9,319 results on '"SECONDARY"'
Search Results
102. Intervention in Textual Comprehension of Mathematical Word Problems: A Case Study.
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Toxtle-Colotl, Adriana, Antonio Juárez-López, José, and Socorro García-González, María del
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PROBLEM solving ,MATHEMATICAL models ,HIGH school students ,SEMI-structured interviews ,QUALITATIVE research - Abstract
Word Mathematical Problem solving involves a phase of Comprehension or construction of a Situational Model. This paper presents an intervention with a high school student who presented difficulties in the construction of situational models in Word Mathematical Problem Solving. A qualitative research with an instrumental case study design was developed to obtain a profile of the type of difficulties and to intervene by means of semi-structured interviews. The role of situation drawing and the use of concrete materials during the interviews as a strategy to encourage the construction of situation models is also reported. [ABSTRACT FROM AUTHOR]
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- 2024
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103. Challenges of Post-Venipuncture Jugular Venous Thrombosis in Patients with Secondary Hyperparathyroidism: A Case Report.
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Jian Zeng, Li Zhao, Hui Jiang, Xiongtiao Yang, Lin Liao, Yanli Zhang, and Hongyi Lei
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VENOUS thrombosis , *HYPERPARATHYROIDISM , *ARTERIAL calcification , *CENTRAL venous catheters , *JUGULAR vein - Abstract
Objective: Unusual clinical course. Background: Hyperparathyroidism is a common issue in patients on long-term hemodialysis, necessitating parathyroidectomy with deep venipuncture. These patients frequently exhibit a heightened incidence of vascular calcification, complicating deep venipuncture and increasing the risk of associated complications. Therefore, a crucial aspect of preoperative assessment in this population involves identifying vascular calcification, with a preference for ultrasound-guided intraplane puncture. Special care is required to prevent blood vessel injuries and postoperative complications such as deep vein thrombosis. Case Report: We present the case of a 66-year-old woman with secondary hyperparathyroidism who encountered challenges during an internal jugular vein puncture, leading to subsequent thrombosis. Initial attempts were hindered by calcification of the internal jugular vein's vascular wall, resulting in stratified damage to the vessel's wall. However, the ultrasound-guided in-plane puncture technique successfully allowed the insertion of a central venous catheter without further damage to the vascular wall. On the postoperative fourth day, thrombus formation was observed in the damaged vascular wall from the initial puncture. Conclusions: The ultrasound-guided in-plane puncture technique is advantageous in overcoming the difficulties associated with puncturing through deep vein calcification in patients with secondary hyperparathyroidism. This technique also diminishes the likelihood of complications such as venous thrombosis. [ABSTRACT FROM AUTHOR]
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- 2024
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104. Patterns of Diversity and Community Assembly and Their Environmental Explanation across Different Types of Shrublands in the Western Loess Plateau.
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Xu, Jinshi, Dang, Han, Hu, Dechang, Zhang, Ping, and Liu, Xiao
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SHRUBLANDS ,SOIL biodiversity ,ARID regions ,WATER conservation ,SOIL conservation ,SOIL moisture - Abstract
Shrubland is an important type of vegetation in the semi-arid region of the western Loess Plateau, and it is of great value to the maintenance of biodiversity and soil and water conservation. Equally, there may be significant differences in the level of diversity and the community assembly patterns across different types of shrublands (desert, alpine, and secondary shrublands). This study aimed to reveal the diversity and the community assembly patterns of different types of shrublands and the environmental explanations for these by using a taxonomic and phylogenetic analysis approach, as well as by considering soil and climate factors. The diversity level of the desert shrublands was low, and the habitats of the three types of shrubland were significantly different. Precipitation may be the main environmental factor driving the variation in and diversity of these types of shrubland. All three types of shrubland were strongly affected by environmental filtering and competitive exclusion, and their community assembly patterns were similar. [ABSTRACT FROM AUTHOR]
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- 2024
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105. Evaluation of Quality and Equality in Education Using the European Foundation for Quality Management Excellence Model—A Literature Review.
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Taraza, Effrosyni, Anastasiadou, Sofia, Papademetriou, Christos, and Masouras, Andreas
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Purpose: The purpose of this study was to determine the effects of the European Foundation for Quality Management (EFQM) Excellence Model on education and its contribution to ensuring high-quality education equality. Design/Methodology/Approach: A systematic literature review was conducted based on data from three academic publishers (Taylor & Francis, Emerald, and Elsevier Science Direct). Of the 69 journal articles, 61 were published between 2003 and 2023 and documented the results of the EFQM quality tool, and 8 articles were removed. Findings: The study highlights the results of applying the EFQM Excellence Model in the educational sector. Based on the bibliographic review, the feasibility of using the model in primary, secondary, and tertiary education is identified. We examine the findings related to using the model to ensure equality in high-quality education and the challenges faced by educational systems, with the ultimate goal of meeting student expectations. Research limitations/Implications: An important limitation is that the data were only drawn from three major publishers and the authors did not have access to all the relevant databases, since the search for articles was carried out in English only. The search for articles was limited by the keywords, as the EFQM Excellence Model was originally designed for the private sector. Practical implications: The results and limitations recorded in the study and the presentation of the 88 articles motivate academic researchers to conduct further study and fill the gap left by the limited number of publications on the application of the EFQM Excellence Model in the educational sector. Originality/Value: The EFQM Excellence Model has not been widely implemented in the high-quality educational sector and the existing literature reviews are limited. More research in the field of education is needed to determine the contribution of the excellence model to the evaluation of high-quality education. [ABSTRACT FROM AUTHOR]
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- 2024
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106. Visual Snow: Updates and Narrative Review.
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Stern, Jennifer I. and Robertson, Carrie E.
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Purpose of Review: Visual snow (VS) involves visualization of innumerable dots throughout the visual field, sometimes resembling "TV static." Patients who experience this symptom may also have additional visual symptoms (e.g., photophobia, palinopsia, floaters, and nyctalopia) with a pattern now defined as visual snow syndrome (VSS). This manuscript describes both VS and VSS in detail and provides an updated review on the clinical features, pathophysiology, and optimal management strategies for these symptoms. Recent Findings: VS/VSS may be primary or secondary to a variety of etiologies, including ophthalmologic or brain disorders, systemic disease, and medication/hallucinogen exposure. Evaluation involves ruling out secondary causes and mimics of VS. Increasing evidence suggests that VSS is a widespread process extending beyond the visual system. Pathophysiology may involve cortical hyperexcitability or dysfunctional connectivity of thalamocortical or attention/salience networks. Summary: VSS is typically a benign, non-progressive syndrome and can be managed with non-medicine strategies. Though no medication provides complete relief, some may provide partial improvement in severity of VS. [ABSTRACT FROM AUTHOR]
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- 2024
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107. Stable Separation of Orbits for Finite Abelian Group Actions.
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Cahill, Jameson, Contreras, Andres, and Hip, Andres Contreras
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In this paper we construct two new families of invariant maps that separate the orbits of the action of a finite Abelian group on a finite dimensional complex vector space. One of these families is Lipschitz continuous with respect to the quotient metric on the space of orbits, but involves computing large powers of the components of the vectors which can lead to instabilities. The other family avoids this issue by putting the powers only on the phase of the components, but in turn is not continuous. However, we show that they are Lipschitz continuous on the set of vectors with fixed support, so in particular they are Lipschitz on the set of vectors with no zero entries. Furthermore, the target dimension of these maps is small, i.e., linear in the original dimension. [ABSTRACT FROM AUTHOR]
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- 2024
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108. Creating Spaces of Engagement: Exploring High School Youth’s Voices in Reshaping the Social Justice Curriculum
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Shuyuan Liu, Kenneth Gyamerah, Claire Ahn, and Thashika Pillay
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Engagement ,Secondary ,Social Justice ,Education - Abstract
The current structure of formal education makes it difficult for teachers and students to hold meaningful conversations to support high-school youth’s meaning-making of critical social-justice issues. This paper presents data on three high-school youth’s knowledge and experiences with social justice issues during the pandemic. Specifically, the paper aims to explore how youth construct knowledge and counter dominant discourses through utilizing informal learning spaces, such as social media platforms, peer and family conversations, as well as personal encounters. In addition, and more importantly, an exploration of how formal education can incorporate social-justice issues into the curriculum is considered. The analysis of these high school youth’s interview conversations presents their diverging needs to learn about social-justice topics in both formal and informal learning contexts. The data also illustrates the power of their voices in a way that could inform future curriculum development. Discussions and implications highlight the possibility of creating such ethical spaces in formal education to engage in social-justice topics.
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- 2024
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109. Facilitating Productive Struggle in an Online Secondary Education Mathematics Methods Course: Experiences of Pre-Service Teachers
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Shelli Casler-Failing
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Productive Struggle ,Online ,Mathematics ,Secondary ,Pre-service Education ,Education - Abstract
This research investigated preservice teachers’ (PSTs) experiences with productive struggle in an online environment, and how it influenced their pedagogical knowledge. This action research study reports on secondary mathematics pre-service teachers (PSTs) who completed mathematical tasks in weekly synchronous Zoom sessions to develop their understanding of productive struggle. Vygotsky’s (1978) Social Constructivist Theory and the growth mindset framework (Boaler, 2016; Dweck 2006; 2008) provided the lenses through which the research was designed and analyzed. Findings show that presenting opportunities for PSTs to experience productive struggle informs their pedagogical practice, and that providing this experience in an online environment is possible. PSTs gained an increased understanding of the importance of collaborative work, asking purposeful questions, and the alignment between productive struggle and improved mathematical understanding.
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- 2024
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110. Validation of a Spanish version of the Foreign Language Classroom Anxiety Scale in Peruvian secondary education students
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Ruth V. Quispe-Sanca, Gissel Arteta-Sandoval, David Quispe-Sanca, and Wilter C. Morales-García
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anxiety ,secondary ,education ,classroom ,students ,Education (General) ,L7-991 - Abstract
BackgroundAnxiety in learning foreign languages is a global phenomenon that impacts students’ academic performance, with English being a critical language in secondary education. The Foreign Language Classroom Anxiety Scale (FLCAS) has been widely used to assess this anxiety. However, the need to validate and adapt the scale for specific cultural contexts remains a priority in educational research.ObjectiveTo assess the validity and reliability of a Spanish version of the FLCAS among a sample of Peruvian secondary education students, in order to better understand the structure of language learning anxiety in this context.MethodsA total of 818 students from four public educational institutions in southern Peru participated. An instrumental design was used, which included descriptive analysis, exploratory factor analysis (EFA), confirmatory factor analysis (CFA), and assessments of convergent, divergent validity, and measurement invariance by gender.ResultsThe EFA recommended a four-factor model that explained 32% of the total variance. Subsequent CFA adjusted this model to 24 items with optimal fit indices (CFI = 0.969; RMSEA = 0.045). The reliability of the factors was acceptable (α > 0.70 for all factors). Convergent and divergent validity was confirmed through significant correlations with related constructs (Fear of Negative Evaluation and Enjoyment of Foreign Language). Gender invariance analysis indicated that the scale is equally applicable to men and women.ConclusionThe Spanish version of the FLCAS is a valid and reliable tool for assessing foreign language classroom anxiety among Peruvian secondary education students. This study contributes to the field of language teaching by providing evidence of the cultural applicability of the FLCAS in the Peruvian context, thus facilitating more effective pedagogical interventions to address language learning anxiety.
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- 2024
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111. Therapy-related myeloid neoplasms resembling juvenile myelomonocytic leukemia: a case series and review of the literature.
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Wintering, Astrid, Smith, Stephen, Fuh, Beng, Rangaswami, Arun, Dahl, Gary, Chien, May, Gruber, Tanja A, Dang, Jinjun, Li, Loretta S, Lenzen, Alicia, Savelli, Stephanie, Dvorak, Christopher C, Agrawal, Anurag K, and Stieglitz, Elliot
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Humans ,Neoplasms ,Second Primary ,Myelodysplastic Syndromes ,Myeloproliferative Disorders ,Leukemia ,Myelomonocytic ,Juvenile ,AML ,JMML ,MDS ,secondary ,therapy related ,Cancer ,Pediatric ,Clinical Research ,Childhood Leukemia ,Pediatric Cancer ,Orphan Drug ,Rare Diseases ,Hematology ,Pediatric Research Initiative ,Clinical Sciences ,Oncology and Carcinogenesis ,Paediatrics and Reproductive Medicine ,Oncology & Carcinogenesis - Abstract
Therapy-related myeloid neoplasms (t-MN) are a distinct subgroup of myeloid malignancies with a poor prognosis that include cases of therapy-related myelodysplastic syndrome (t-MDS), therapy-related myeloproliferative neoplasms (t-MPN) and therapy-related acute myeloid leukemia (t-AML). Here, we report a series of patients with clinical features consistent with juvenile myelomonocytic leukemia (JMML), an overlap syndrome of MDS and myeloproliferative neoplasms that developed after treatment for another malignancy.
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- 2022
112. Clinicopathological Outcomes in Focal Segmental Glomerulosclerosis: A Retrospective Cohort Study
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Girish P Vakrani, R Priyashree, Tanuja Nambakam, and KY Yashavantha Kumar
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immunosuppressives ,nephrotic syndrome ,secondary ,Medicine - Abstract
Introduction: Focal Segmental Glomerulosclerosis (FSGS) is a nephrotic syndrome with a variety of clinicopathological presentations and varied responses to treatment. Hence, this study attempts to classify FSGS based on clinical presentation and pathological findings on kidney biopsy, which is essential for appropriate treatment and avoidance of inappropriate use of immunosuppressants. Aim: To analyse clinicopathological findings and responses to immunosuppressants in FSGS. Materials and Methods: A retrospective cohort study was conducted at Department of Nephrology, Vydehi Institute of Medical Sciences and Research Centre Bengaluru, Karnataka, India, to analyse clinicopathological parameters such as urine analysis, 24-hour urine protein, serum creatinine, serum albumin, lipid profile, renal biopsy details, and response to treatment in 97 patients. The study was planned, analysed, and executed between January 2023 and February 2023. All variables were expressed as mean±standard deviation or percentage. Statistical analysis was performed using Statistical Package for Social Sciences (SPSS) software version 16.0. Results: Among a total of 97 patients, 64% were males. Sudden onset oedema was observed in 90% of the cases, while nephrotic proteinuria was seen in 71%. The Not Otherwise Specified (NOS) variant was noted in 60% of the cases. Complete remission was observed in 61%, suggesting a possible primary FSGS. Persistent nephrotic proteinuria with a poor response to therapy was noted in 32%, indicating a possible secondary/genetic FSGS, despite adequate immunosuppressive therapy. Therefore, differentiating between primary and secondary forms of FSGS has therapeutic and prognostic implications. Accurate diagnosis of each form of FSGS is vital to avoid unnecessary immunosuppressive-based therapy and establish appropriate treatment. Conclusion: Resistance to steroid therapy was observed in one-third of FSGS patients. It is likely that unrecognised genetic FSGS or secondary FSGS were included among the study group of primary FSGS, leading to misinterpretation of treatment responses in primary FSGS. Hence, a clinicopathological approach for correctly differentiating between primary FSGS, secondary (maladaptive, viral, or toxic) FSGS, and genetic FSGS helps in making correct treatment decisions.
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- 2024
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113. A mixed-methods investigation of third and sixth graders’ academic sentence knowledge
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Townsend Dianna, Knecht Rachel, Lupo Sarah, Chen Li-Ting, and Barrios Vickie Smith
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academic language ,cohesion ,metalinguistic awareness ,mixed methods ,elementary ,secondary ,Language and Literature - Abstract
This qualitative-dominant mixed methods study aimed to investigate how native English speaking third graders (n = 72) and sixth graders (n = 88) navigate cohesive ties in academic sentences. There are studies on supporting students with academic language at the word and text levels, but less research has been done on readers’ knowledge of the dense and challenging sentences in academic texts. The current study examines both how students navigate cohesion in academic sentences as well as how their knowledge of cohesion relates to their performance on reading comprehension measures. With a multi-case study framework, we analyzed students’ (n = 6) metalinguistic interviews with academic sentences. We then designed Maze tasks for a larger sample (n = 160) to identify patterns in students’ knowledge of cohesion. We also conducted correlational analyses between students’ sentence-level knowledge and performance on measures of reading comprehension. Qualitative findings suggest that students draw on both metalinguistic and epilinguistic knowledge to explain cohesion, and that students value explicit instruction with academic sentences. Quantitative findings show that knowledge of cohesive ties is significantly correlated with performance on reading comprehension measures. Implications and future research for both monolingual and multilingual learners are addressed.
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- 2023
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114. Hidden in the dark under umbrellas: two new Psilolechia species (lichenized Ascomycota , Lecanorales ) described from the Czech Republic
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Zdeněk Palice, Stanislav Svoboda, and Jan Vondrák
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ascomycetes ,hyphomycetous lichens ,lecanorales ,psilolechiaceae ,secondary ,chemistry ,sterile lichens ,taxonomy ,Botany ,QK1-989 - Abstract
Recent lichenological fieldwork in the Czech Republic resulted in the discovery of two previously unrecognized entities in the genus Psilolechia which are described below as new species: the saxicolous P. cretacea and the lignicolous P. torii . Both taxa regularly produce a hyphomycetous anamorph in the form of erect, elongate conidiogenous cells on the thallus surface, and both contain unidentified specific secondary metabolites. The placement of the two new species within the genus is primarily based on morphology and chemistry. In addition, three barcodes were received for P. cretacea (ITS, mtSSU) and P. torii (ITS). A key to the five species of Psilolechia currently known from Europe is included.
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- 2023
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115. Field Cancerization in Action; A Case of Synchronous Triple Primary Malignancies in the Head and Neck.
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Lakshmanan, Jijitha, Kushwaha, Akshat, Raja, Kalaiarasi, and G., Sivaraman
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NECK , *SQUAMOUS cell carcinoma , *TONGUE cancer - Abstract
Field cancerization is the phenomenon that classically describes the occurrence of multiple primary malignancies in the head and neck subsites, either synchronous or metachronous. It's unusual to come across synchronous primaries, that too three at a time. Here is a patient who presented to us with triple primary squamous cell carcinomas involving the floor of the mouth, base of the tongue, and glottis at the same time....... [ABSTRACT FROM AUTHOR]
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- 2024
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116. SARS-CoV-2 vaccine protection and deaths among US veterans during 2021
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Cohn, Barbara A, Cirillo, Piera M, Murphy, Caitlin C, Krigbaum, Nickilou Y, and Wallace, Arthur W
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Biomedical and Clinical Sciences ,Clinical Sciences ,Immunization ,Emerging Infectious Diseases ,Pneumonia ,Lung ,Prevention ,Infectious Diseases ,Vaccine Related ,Biodefense ,3.4 Vaccines ,Prevention of disease and conditions ,and promotion of well-being ,Infection ,Good Health and Well Being ,2019-nCoV Vaccine mRNA-1273 ,Ad26COVS1 ,Aged ,BNT162 Vaccine ,COVID-19 ,COVID-19 Vaccines ,Comorbidity ,Female ,Humans ,Immunization ,Secondary ,Male ,Middle Aged ,SARS-CoV-2 ,United States ,Vaccination ,Vaccine Efficacy ,Veterans ,General Science & Technology - Abstract
We report severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccine effectiveness against infection (VE-I) and death (VE-D) by vaccine type in 780,225 veterans in the Veterans Health Administration, covering 2.7% of the US population. From February to October 2021, VE-I declined for all vaccine types, and the decline was greatest for the Janssen vaccine, resulting in a VE-I of 13.1%. Although breakthrough infection increased risk of death, vaccination remained protective against death in persons who became infected during the Delta variant surge. From July to October 2021, VE-D for age
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- 2022
117. Effectiveness of a Third Dose of Pfizer-BioNTech and Moderna Vaccines in Preventing COVID-19 Hospitalization Among Immunocompetent and Immunocompromised Adults — United States, August–December 2021
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Tenforde, Mark W, Patel, Manish M, Gaglani, Manjusha, Ginde, Adit A, Douin, David J, Talbot, H Keipp, Casey, Jonathan D, Mohr, Nicholas M, Zepeski, Anne, McNeal, Tresa, Ghamande, Shekhar, Gibbs, Kevin W, Files, D Clark, Hager, David N, Shehu, Arber, Prekker, Matthew E, Erickson, Heidi L, Gong, Michelle N, Mohamed, Amira, Johnson, Nicholas J, Srinivasan, Vasisht, Steingrub, Jay S, Peltan, Ithan D, Brown, Samuel M, Martin, Emily T, Monto, Arnold S, Khan, Akram, Hough, Catherine L, Busse, Laurence W, Duggal, Abhijit, Wilson, Jennifer G, Qadir, Nida, Chang, Steven Y, Mallow, Christopher, Rivas, Carolina, Babcock, Hilary M, Kwon, Jennie H, Exline, Matthew C, Botros, Mena, Lauring, Adam S, Shapiro, Nathan I, Halasa, Natasha, Chappell, James D, Grijalva, Carlos G, Rice, Todd W, Jones, Ian D, Stubblefield, William B, Baughman, Adrienne, Womack, Kelsey N, Rhoads, Jillian P, Lindsell, Christopher J, Hart, Kimberly W, Zhu, Yuwei, Naioti, Eric A, Adams, Katherine, Lewis, Nathaniel M, Surie, Diya, McMorrow, Meredith L, Self, Wesley H, Calhoun, Nicole, Murthy, Kempapura, Herrick, Judy, McKillop, Amanda, Hoffman, Eric, Zayed, Martha, Smith, Michael, Kindle, Ryan, Kozikowski, Lori-Ann, De Souza, Lesley, Ouellette, Scott, Thornton-Thompson, Sherell, Mehkri, Omar, Ashok, Kiran, Gole, Susan, King, Alexander, Poynter, Bryan, ten Lohuis, Caitlin, Stanley, Nicholas, Hendrickson, Audrey, Caspers, Sean, Tordsen, Walker, Kaus, Olivia, Scharber, Tyler, Jorgensen, Jeffrey, Bowers, Robert, King, Jennifer, Aston, Valerie, Rothman, Richard E, Ali, Harith, Nair, Rahul, Karow, Sarah, Robart, Emily, Maldonado, Paulo Nunes, Khan, Maryiam, So, Preston, Krol, Olivia, Martinez, Jesus, Zouyed, Zachary, Acosta, Michael, and Bazyarboroujeni, Reihaneh
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Immunization ,Infectious Diseases ,Prevention ,Vaccine Related ,Clinical Research ,Evaluation of treatments and therapeutic interventions ,6.1 Pharmaceuticals ,Good Health and Well Being ,2019-nCoV Vaccine mRNA-1273 ,Adult ,Aged ,BNT162 Vaccine ,COVID-19 ,Female ,Hospitalization ,Humans ,Immunization ,Secondary ,Immunocompetence ,Immunocompromised Host ,Male ,Middle Aged ,SARS-CoV-2 ,United States ,Vaccine Efficacy ,IVY Network ,General & Internal Medicine - Abstract
COVID-19 mRNA vaccines (BNT162b2 [Pfizer-BioNTech] and mRNA-1273 [Moderna]) provide protection against infection with SARS-CoV-2, the virus that causes COVID-19, and are highly effective against COVID-19-associated hospitalization among eligible persons who receive 2 doses (1,2). However, vaccine effectiveness (VE) among persons with immunocompromising conditions* is lower than that among immunocompetent persons (2), and VE declines after several months among all persons (3). On August 12, 2021, the Food and Drug Administration (FDA) issued an emergency use authorization (EUA) for a third mRNA vaccine dose as part of a primary series ≥28 days after dose 2 for persons aged ≥12 years with immunocompromising conditions, and, on November 19, 2021, as a booster dose for all adults aged ≥18 years at least 6 months after dose 2, changed to ≥5 months after dose 2 on January 3, 2022 (4,5,6). Among 2,952 adults (including 1,385 COVID-19 case-patients and 1,567 COVID-19-negative controls) hospitalized at 21 U.S. hospitals during August 19-December 15, 2021, effectiveness of mRNA vaccines against COVID-19-associated hospitalization was compared between adults eligible for but who had not received a third vaccine dose (1,251) and vaccine-eligible adults who received a third dose ≥7 days before illness onset (312). Among 1,875 adults without immunocompromising conditions (including 1,065 [57%] unvaccinated, 679 [36%] 2-dose recipients, and 131 [7%] 3-dose [booster] recipients), VE against COVID-19 hospitalization was higher among those who received a booster dose (97%; 95% CI = 95%-99%) compared with that among 2-dose recipients (82%; 95% CI = 77%-86%) (p
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- 2022
118. Emulation of the structure of the Saposin protein fold by a lung surfactant peptide construct of surfactant Protein B
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Waring, Alan J, Whitelegge, Julian P, Sharma, Shantanu K, Gordon, Larry M, and Walther, Frans J
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Analytical Chemistry ,Biochemistry and Cell Biology ,Chemical Sciences ,Biological Sciences ,Lung ,Bioengineering ,Protein Structure ,Secondary ,Saposins ,Pulmonary Surfactants ,Peptides ,Spectroscopy ,Fourier Transform Infrared ,Surface-Active Agents ,Disulfides ,Solvents ,General Science & Technology - Abstract
The three-dimensional structure of the synthetic lung Surfactant Protein B Peptide Super Mini-B was determined using an integrative experimental approach, including mass spectrometry and isotope enhanced Fourier-transform infrared (FTIR) spectroscopy. Mass spectral analysis of the peptide, oxidized by solvent assisted region-specific disulfide formation, confirmed that the correct folding and disulfide pairing could be facilitated using two different oxidative structure-promoting solvent systems. Residue specific analysis by isotope enhanced FTIR indicated that the N-terminal and C-terminal domains have well defined α-helical amino acid sequences. Using these experimentally derived measures of distance constraints and disulfide connectivity, the ensemble was further refined with molecular dynamics to provide a medium resolution, residue-specific structure for the peptide construct in a simulated synthetic lung surfactant lipid multilayer environment. The disulfide connectivity combined with the α-helical elements stabilize the peptide conformationally to form a helical hairpin structure that resembles critical elements of the Saposin protein fold of the predicted full-length Surfactant Protein B structure.
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- 2022
119. Fusion protein strategies for cryo-EM study of G protein-coupled receptors
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Zhang, Kaihua, Wu, Hao, Hoppe, Nicholas, Manglik, Aashish, and Cheng, Yifan
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Underpinning research ,1.1 Normal biological development and functioning ,Generic health relevance ,Cryoelectron Microscopy ,Crystallography ,GTP-Binding Proteins ,Protein Structure ,Secondary ,Receptors ,G-Protein-Coupled - Abstract
Single particle cryogenic-electron microscopy (cryo-EM) is used extensively to determine structures of activated G protein-coupled receptors (GPCRs) in complex with G proteins or arrestins. However, applying it to GPCRs without signaling proteins remains challenging because most receptors lack structural features in their soluble domains to facilitate image alignment. In GPCR crystallography, inserting a fusion protein between transmembrane helices 5 and 6 is a highly successful strategy for crystallization. Although a similar strategy has the potential to broadly facilitate cryo-EM structure determination of GPCRs alone without signaling protein, the critical determinants that make this approach successful are not yet clear. Here, we address this shortcoming by exploring different fusion protein designs, which lead to structures of antagonist bound A2A adenosine receptor at 3.4 Å resolution and unliganded Smoothened at 3.7 Å resolution. The fusion strategies explored here are likely applicable to cryo-EM interrogation of other GPCRs and small integral membrane proteins.
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- 2022
120. Efficacy of the mRNA-1273 SARS-CoV-2 Vaccine at Completion of Blinded Phase
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El Sahly, Hana M, Baden, Lindsey R, Essink, Brandon, Doblecki-Lewis, Susanne, Martin, Judith M, Anderson, Evan J, Campbell, Thomas B, Clark, Jesse, Jackson, Lisa A, Fichtenbaum, Carl J, Zervos, Marcus, Rankin, Bruce, Eder, Frank, Feldman, Gregory, Kennelly, Christina, Han-Conrad, Laurie, Levin, Michael, Neuzil, Kathleen M, Corey, Lawrence, Gilbert, Peter, Janes, Holly, Follmann, Dean, Marovich, Mary, Polakowski, Laura, Mascola, John R, Ledgerwood, Julie E, Graham, Barney S, August, Allison, Clouting, Heather, Deng, Weiping, Han, Shu, Leav, Brett, Manzo, Deb, Pajon, Rolando, Schödel, Florian, Tomassini, Joanne E, Zhou, Honghong, and Miller, Jacqueline
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Biomedical and Clinical Sciences ,Clinical Sciences ,Clinical Trials and Supportive Activities ,Coronaviruses ,Immunization ,Infectious Diseases ,Emerging Infectious Diseases ,Vaccine Related ,Biotechnology ,Clinical Research ,Prevention ,Genetics ,6.1 Pharmaceuticals ,Infection ,Good Health and Well Being ,2019-nCoV Vaccine mRNA-1273 ,Adolescent ,Adult ,Aged ,COVID-19 ,COVID-19 Vaccines ,Follow-Up Studies ,Humans ,Immunization ,Secondary ,Immunogenicity ,Vaccine ,Incidence ,Intention to Treat Analysis ,Male ,Middle Aged ,Patient Acuity ,Single-Blind Method ,Treatment Outcome ,Young Adult ,COVE Study Group ,Medical and Health Sciences ,General & Internal Medicine ,Biomedical and clinical sciences ,Health sciences - Abstract
BackgroundAt interim analysis in a phase 3, observer-blinded, placebo-controlled clinical trial, the mRNA-1273 vaccine showed 94.1% efficacy in preventing coronavirus disease 2019 (Covid-19). After emergency use of the vaccine was authorized, the protocol was amended to include an open-label phase. Final analyses of efficacy and safety data from the blinded phase of the trial are reported.MethodsWe enrolled volunteers who were at high risk for Covid-19 or its complications; participants were randomly assigned in a 1:1 ratio to receive two intramuscular injections of mRNA-1273 (100 μg) or placebo, 28 days apart, at 99 centers across the United States. The primary end point was prevention of Covid-19 illness with onset at least 14 days after the second injection in participants who had not previously been infected with the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The data cutoff date was March 26, 2021.ResultsThe trial enrolled 30,415 participants; 15,209 were assigned to receive the mRNA-1273 vaccine, and 15,206 to receive placebo. More than 96% of participants received both injections, 2.3% had evidence of SARS-CoV-2 infection at baseline, and the median follow-up was 5.3 months in the blinded phase. Vaccine efficacy in preventing Covid-19 illness was 93.2% (95% confidence interval [CI], 91.0 to 94.8), with 55 confirmed cases in the mRNA-1273 group (9.6 per 1000 person-years; 95% CI, 7.2 to 12.5) and 744 in the placebo group (136.6 per 1000 person-years; 95% CI, 127.0 to 146.8). The efficacy in preventing severe disease was 98.2% (95% CI, 92.8 to 99.6), with 2 cases in the mRNA-1273 group and 106 in the placebo group, and the efficacy in preventing asymptomatic infection starting 14 days after the second injection was 63.0% (95% CI, 56.6 to 68.5), with 214 cases in the mRNA-1273 group and 498 in the placebo group. Vaccine efficacy was consistent across ethnic and racial groups, age groups, and participants with coexisting conditions. No safety concerns were identified.ConclusionsThe mRNA-1273 vaccine continued to be efficacious in preventing Covid-19 illness and severe disease at more than 5 months, with an acceptable safety profile, and protection against asymptomatic infection was observed. (Funded by the Biomedical Advanced Research and Development Authority and the National Institute of Allergy and Infectious Diseases; COVE ClinicalTrials.gov number, NCT04470427.).
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- 2021
121. How to provide the needed protection from COVID-19 to patients with hematologic malignancies
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Ribas, Antoni, Dhodapkar, Madhav V, Campbell, Katie M, Davies, Faith E, Gore, Steven D, Levy, Ronald, and Greenberger, Lee M
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Prevention ,Immunization ,Cancer ,Vaccine Related ,Emerging Infectious Diseases ,Patient Safety ,Hematology ,Good Health and Well Being ,Adult ,COVID-19 ,COVID-19 Vaccines ,Hematologic Neoplasms ,Humans ,Immunization ,Secondary ,SARS-CoV-2 - Abstract
Patients with hematologic malignancies are particularly vulnerable to COVID-19 infections, and upon a pooled data analysis of 24 publications, there is evidence that they have suboptimal antibody responses to COVID-19 vaccination and boosters. To provide them the needed additional protection from COVID-19, it is imperative to achieve a 100% full immunization rate in health care workers and adult caretakers, and to foster research to test higher doses and repeated rounds of COVID-19 vaccines and the use of passive immune prophylaxis and therapy.
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- 2021
122. Splenic infarction secondary to polycythemia Vera: Case report and literature review
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Qusay Abdoh, PhD, Mohammad Alnees, MD, Islam Rajab, MD, Alaa Zayed, MD, Hamza Salim, MD, Abdelkarim Barqawi, PhD, and Riad Amer, PhD
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Splenic ,Infarction ,Secondary ,Polycythemia Vera ,Case ,Report ,Medical physics. Medical radiology. Nuclear medicine ,R895-920 - Abstract
Splenic infarction is a medical condition characterized by compromised blood flow to the spleen, resulting in partial or complete organ infarction. This condition is commonly observed in patients with an increased risk of thrombosis, such as those with Polycythemia Vera (PV).A 40-year-old female patient presented with fatigue, weakness, and an enlarged spleen, further tests revealed elevated levels of hemoglobin, white blood cells, and platelets. A bone marrow biopsy and positive Jack II mutations confirmed the diagnosis of PV. The patient later developed portal hypertension, varices, and splenic infarction.This case report aims to raise awareness about the potential complications of PV and emphasizes the importance of early intervention to prevent serious consequences such as splenic infarction. Additionally, it highlights the role of splenectomy in managing complications associated with PV.
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- 2023
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123. MRI findings in children with migraine or tension-type headache
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Rabia Tütüncü Toker, Ilknur Ozdeniz Mutlucan, Cigdem Tanrıverdi, and Aylin Bican Demir
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Headache ,Primary ,Secondary ,Neuroimaging ,Mrı ,Papilledema ,Pediatrics ,RJ1-570 - Abstract
Abstract Purpose Migraine and tension-type headache are common primary headaches in children. There is a risk of developing secondary headache in children. The current study was aimed to evaluate magnetic resonance imaging findings (MRI) in children with migraine or tension-type headache. Methods The study was planned in children with migraine or tension-type headaches who have been followed up in the pediatric neurology outpatient clinic with regular office visits for at least two years and had neuroimaging in the last year. Results 280 patients (187 female patients) datas were studied. 91 (61 female patients) were followed up with the diagnosis of migraine and 189 (126 female patients) with the diagnosis of tension-type headaches. The age of patients was found to be 13.1 ± 3.4 years. Brain tumor was found in one child with tension-type headache who had papilledema. Incidental MRI findings found 7.7% and 12.7% in migraine and tension-type headache, respectively. MRI findings in the study were arachnoid cyst (14), pituitary adenoma (6), mega cisterna magna (6), pineal cyst (3), non-specific gliosis (2) and tumor (1). Conclusion Arachnoid cysts were found incidental as the most common MRI finding in children with migraine or tension-type headache. The rare life-threatening secondary headache may develop in children. The fundus examination as a complement to the neurological examination can be useful for requesting MRI.
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- 2023
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124. Simple closed curves in inverse limits with set-valued functions
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Juárez-Villa, Leonardo
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- 2025
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125. Some remarks on Phelps property U of a Banach space into C(K) spaces.
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Cobollo, Christian, Guirao, Antonio José, and Montesinos, Vicente
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A subspace X of a Banach space Y has Property U whenever every continuous linear functional on X has a unique norm-preserving (i.e., Hahn–Banach) extension to Y (Phelps in Trans Am Math Soc 95:238–255, 1960). Throughout this document, we introduce and develop a systematic study of the existence of U-embeddings between Banach spaces X and Y, that is, isometric embeddings of X into Y whose ranges have property U. In particular, we focus on the case Y = C (K) , where K is a compact Hausdorff topological space. We provide results for X a reflexive or another C(K) space. [ABSTRACT FROM AUTHOR]
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- 2024
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126. 'Me hizo sentir como científica': the expressed science identities of multilingual learners in high school biology classrooms.
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Staggs, Molly M. and Brown, Julie C.
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SCIENCE education , *BIOLOGY , *SCIENCE students , *HIGH school students , *MULTILINGUALISM - Abstract
To make sound science-related decisions in a global society, individuals must possess a science identity, or see themselves as capable of doing and understanding science. Science identity development begins in school-aged years, when multilingual students (MLs) are often marginalised in the classroom due to language challenges and low expectations placed on them. This descriptive multiple case study explores the science identities expressed by six US high school MLs in their biology classrooms. Data from semi structured interviews were analysed through qualitative coding methods. Secondary data sources included field notes from observations conducted in each student's classroom six times during the school year. Results revealed that all MLs expressed science identity indicators, including feeling like a scientist, having a personal interest in science, and seeing science as related to their worlds. Other important identity indicators were not expressed among all students, such as views of themselves as 'good' science students, doing or using science outside of school, and career aspirations. Over half of MLs cited language as a direct barrier to their science identities. The study makes several contributions to the field of science education, which are detailed. Implications are presented for nurturing MLs' science identities in the formal classroom. [ABSTRACT FROM AUTHOR]
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- 2024
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127. ASIA syndrome and the nociceptive storm: A case report of a refractory headache and a pathophysiological hypothesis.
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Makita, Luana Miyahira, Grossklags Locatelli, Giovanna, Josetti, Giovanna Porreca, Itimura, Giovana Takeshita, and Piovesan, Elcio Juliato
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IMMUNOLOGIC receptors , *SLEEP interruptions , *BREAST implants , *FATIGUE (Physiology) , *MEDICAL care - Abstract
Background: Autoimmune/inflammatory syndrome induced by adjuvants (ASIA) encompasses a set of immune rare diseases triggered by adjuvants, like silicone. Although headache is typical in these cases, the literature lacks information about its characteristics and pathophysiology in ASIA. Objective: Describe and discuss a case of ASIA with headache as the main symptom, approaching its immunopathological and clinical aspects. Case: A 45-year-old woman with silicone prosthesis presented an intense headache, accompanied by chronic fatigue, sleep and skin disturbances, paresthesia, and generalized body aches. She had sought medical care over the past 2 years, with no underlying identified until then. The fulfillment of ASIA diagnostic criteria and subsequent prosthesis explantation resulted in symptom resolution. Conclusion: Additional research is required to understand the semiotic patterns linked to ASIA syndrome-induced headaches. A dysregulation in histaminergic GPCR and GRK levels is hypothesized by the authors to be involved in the main mechanisms responsible for leading the headache nociceptive storm induced in ASIA. [ABSTRACT FROM AUTHOR]
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- 2024
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128. Impact of COVID‐19 pandemic on secondary school teaching staff and primary to secondary transitions.
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Edge, David, Redwood, Sabi, Jindal‐Snape, Divya, and Crawley, Esther
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COVID-19 pandemic , *SECONDARY schools , *EMOTIONAL intelligence , *SECONDARY education , *PRIMARY education , *VIRTUAL tourism - Abstract
In common with many countries, UK schools closed for most pupils for periods between March 2020 and March 2021 because of the Covid‐19 pandemic, with significant implications for school education and the primary to secondary school transition. The transition to secondary school occurs at a crucial time of child development, with evidence suggesting transition may have a range of impacts on pupil wellbeing and academic performance. We wanted to understand how the pandemic had affected secondary teaching staff and their pupils during the move to secondary school. The study involved semistructured interviews with transition leaders from 12 secondary schools with subsequent thematic analysis. The findings of the study include; potential benefits from the digitalization of teaching practice; improving both pupil inclusion and staff efficiency, an enhanced interface with new parents resulting from virtual tours and open evenings, implications for the scope of existing teacher training with regard to virtual learning and concerns over pupil wellbeing, with increased levels of anxiety and a lack of emotional intelligence resulting from lockdowns. The study concludes that whilst the overall impact of the pandemic was probably detrimental to pupils' education and transitions practice, some potentially significant educational opportunities have arisen. Practitioners points: 1.The Covid‐19 pandemic forced significant changes to the degree of digitalization within schools and the delivery of education. Some of these changes may be permanent, which has significant implications for the skills presently gained during teacher training.2.The use of digital platforms to deliver education was seen by participants to have a range of potential benefits including the ability to deliver education more inclusively to students not previously truly engaged with the school such as persistent absentees or indeed those absent through illness. They also provide an enhanced ability to support pupils who were struggling with schoolwork by them being able to revisit lessons in their own time and at their own pace.3.Participants reported increased levels of anxiety amongst pupils and some participants observed that the year 7 s entering school in 2020 demonstrated: immaturity, a lack of socialization and an inability to manage their emotions when involved in a dispute. This may result in longer term wellbeing issues. [ABSTRACT FROM AUTHOR]
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- 2024
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129. Cord blood transplantation for AML: Comparable LFS in patients with de novo versus secondary AML in CR1, an ALWP/EBMT study.
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Baron, Frédéric, Nagler, Arnon, Galimard, Jacques‐Emmanuel, Sanz, Jaime, Versluis, Jurjen, Forcade, Edouard, Chevallier, Patrice, Sirvent, Anne, Anthias, Chloe, Kuball, Jürgen, Furst, Sabine, Rambaldi, Alessandro, Sierra, Jorge, von dem Borne, Peter A., Gallego Hernanz, Maria Pilar, Cluzeau, Thomas, Robinson, Stephen, Raiola, Anna Maria, Labussière‐Wallet, Hélène, and Byrne, Jenny L.
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CORD blood transplantation , *ACUTE myeloid leukemia , *ACUTE leukemia , *CELL transplantation - Abstract
Summary: We investigated whether secondary versus de novo acute myeloid leukaemia (AML) would be associated with poor outcomes in adult acute AML patients in first complete remission (CR1) receiving unrelated cord blood transplantation (CBT). This is a retrospective study from the acute leukaemia working party of the European Society for Blood and Marrow Transplantation. Inclusion criteria included adult at first allogeneic haematopoietic cell transplantation between 2000 and 2021, unrelated single or double unit CBT, AML in CR1, no ex vivo T‐cell depletion and no post‐transplant cyclophosphamide. The primary end‐point of the study was leukaemia‐free survival (LFS). A total of 879 patients with de novo (n = 696) or secondary (n = 183) AML met the inclusion criteria. In multivariable analyses, sAML patients had non‐significantly different LFS (HR = 0.98, p = 0.86), overall survival (HR = 1.07, p = 0.58), relapse incidence (HR = 0.74, p = 0.09) and non‐relapse mortality (HR = 1.26, p = 0.13) than those with de novo AML. Our results demonstrate non‐significantly different LFS following CBT in adult patients with secondary versus de novo AML. [ABSTRACT FROM AUTHOR]
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- 2024
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130. Solvable Stationary Non Equilibrium States.
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Carinci, G., Franceschini, C., Gabrielli, D., Giardinà, C., and Tsagkarogiannis, D.
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We consider the one dimensional boundary driven harmonic model and its continuous version, both introduced in (Frassek et al. in J Stat Phys 180: 135–171, 2020). By combining duality and integrability the authors of (Frassek and Giardiná in J Math Phys 63: 103301, 2022) obtained the invariant measures in a combinatorial representation. Here we give an integral representation of the invariant measures which turns out to be a convex combination of inhomogeneous product of geometric distributions for the discrete model and a convex combination of inhomogeneous product of exponential distributions for the continuous one. The mean values of the geometric and of the exponential variables are distributed according to the order statistics of i.i.d. uniform random variables on a suitable interval fixed by the boundary sources. The result is obtained solving exactly the stationary condition written in terms of the joint generating function. The method has an interest in itself and can be generalized to study other models. We briefly discuss some applications. [ABSTRACT FROM AUTHOR]
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- 2024
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131. Persistent headache attributed to past ischemic stroke: A prospective cohort study.
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de Oliveira, Felipe A. A., Dourado‐Filho, Mario G., and Sampaio Rocha‐Filho, Pedro A.
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KRUSKAL-Wallis Test , *CONFIDENCE intervals , *ISCHEMIC stroke , *RESEARCH methodology , *QUANTITATIVE research , *MAGNETIC resonance imaging , *INTERVIEWING , *RISK assessment , *T-test (Statistics) , *PEARSON correlation (Statistics) , *SYMPTOMS , *RESEARCH funding , *DESCRIPTIVE statistics , *CHI-squared test , *HEADACHE , *DATA analysis software , *ODDS ratio , *LONGITUDINAL method , *DISEASE risk factors , *DISEASE complications - Abstract
Objective: To assess the incidence, characteristics, and risk factors for developing persistent headache attributed to past ischemic stroke. Background: Although the most recent International Classification of Headache Disorders has recognized the existence of persistent headache attributed to past ischemic stroke, there has been limited research in this area. Methods: This was a prospective cohort study. We initially assessed patients hospitalized with ischemic stroke admitted within 72 h of symptom onset. All patients underwent diffusion‐weighted magnetic resonance imaging. These patients were re‐interviewed by telephone 1 year after the stroke. Semi‐structured questionnaires, the National Institutes of Health Stroke Scale (NIHSS), and six‐item Headache Impact Test were used. Results: A total of 119 participants answered the interview conducted 1 year after the stroke. The mean (standard deviation) age was 64 (13.1) years, 82/119 (68.9%) were female, and the median (interquartile range) NIHSS score was 2 (1.0–4.0). The incidence rate of persistent headache attributed to past ischemic stroke was 12/119 (10.1%; 95% confidence interval [CI] 5.3–17.0%). The most frequent pattern presented was a migraine‐like pattern in seven of the 12 (58.3%) patients, which had a substantial/severe impact on five of the 12 (41.7%). For most patients this headache continued, although it began to improve. Previous migraine (odds ratio 7.1, 95% CI 1.06–50.0; p = 0.043) and headache intensity in the acute phase of stroke (odds ratio 1.75, 95% CI 1.13–2.7; p = 0.012) were associated with the occurrence of persistent headache attributed to past ischemic stroke. Conclusion: Persistent headache attributed to past ischemic stroke is a frequent complication after stroke. It often has a significant impact on patients' lives and presents a migraine‐like pattern as its most frequent phenotype. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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132. Newcomer Emergent Bilingual Students' Meaning-Making in Urban Biology Classrooms: A Communities of Practice Perspective.
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Pacheco, Mark B. and Brown, Julie C.
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- *
COMMUNITIES of practice , *BILINGUAL students , *SOCIAL skills , *CLASSROOMS , *STUDENT participation , *FLIPPED classrooms - Abstract
This study investigated how newcomer emergent bilinguals made meaning in two 9th-grade biology classrooms. Methods relevant to naturalistic inquiry were used to collect and analyze data. Findings indicate that newcomers bridged aspects of personal experiences with social competencies valued in classrooms through using heritage languages, engaging as brokers and collaborators, and attempting to realize goals of learning English and content simultaneously. Findings also show that misalignments between social competence and personal experience constrained meaning-making. This study illustrates a need for activities that reflect and expand newcomer resources and experiences, and for activities that can take shape through student participation. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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133. Desarrollo del pensamiento computacional a través de BlocksCAD, Blockly y la resolución de problemas en matemáticas.
- Author
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MAGREÑÁN-RUIZ, Ángel-Alberto, GONZÁLEZ-CRESPO, Rubén-Arístides, JIMÉNEZ-HERNÁNDEZ, Cristina, and ORCOS-PALMA, Lara
- Subjects
- *
PROBLEM solving , *CLIENT satisfaction , *MATHEMATICS , *SECONDARY education , *CLASSROOMS , *ALGORITHMS , *CUSTOMER loyalty - Abstract
The development of computational thinking has become one of the educational priorities in several countries around the world. In this article, two experiences are described in which two block programming tools are used. The first experience only used BlocksCAD, while the second added the use of Blockly and the work on some mathematical algorithms in a maths classroom. The number of participants in the experience was twenty-eight in the group that only used Blocky and thirteen in the group that combined the use of both tools, all of them of the third year of secondary education (between 14 and 15 years old) in a school in Spain. The results show that, although the use of Blocks-CAD alone allows an increase in the development of CT, if other resources such as Blockly are also used in the mathematics classroom, the effect is multiplied. In addition, considering the satisfaction results of the participants in the experience, together with the possibility of printing their own creations through 3D modelling (a fact claimed by the students themselves), this encourages us to continue using both tools and even to try to combine them with other tools and to design experiences that encompass entire academic courses or, at least, entire trimesters. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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134. Clinicopathological Outcomes in Focal Segmental Glomerulosclerosis: A Retrospective Cohort Study.
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VAKRANI, GIRISH P., PRIYASHREE, R., NAMBAKAM, TANUJA, and KUMAR, KY YASHAVANTHA
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FOCAL segmental glomerulosclerosis ,PROGNOSIS ,MEDICAL sciences ,CLINICAL pathology ,MEDICAL research ,COHORT analysis - Abstract
Introduction: Focal Segmental Glomerulosclerosis (FSGS) is a nephrotic syndrome with a variety of clinicopathological presentations and varied responses to treatment. Hence, this study attempts to classify FSGS based on clinical presentation and pathological findings on kidney biopsy, which is essential for appropriate treatment and avoidance of inappropriate use of immunosuppressants. Aim: To analyse clinicopathological findings and responses to immunosuppressants in FSGS. Materials and Methods: A retrospective cohort study was conducted at Department of Nephrology, Vydehi Institute of Medical Sciences and Research Centre Bengaluru, Karnataka, India, to analyse clinicopathological parameters such as urine analysis, 24-hour urine protein, serum creatinine, serum albumin, lipid profile, renal biopsy details, and response to treatment in 97 patients. The study was planned, analysed, and executed between January 2023 and February 2023. All variables were expressed as mean±standard deviation or percentage. Statistical analysis was performed using Statistical Package for Social Sciences (SPSS) software version 16.0. Results: Among a total of 97 patients, 64% were males. Sudden onset oedema was observed in 90% of the cases, while nephrotic proteinuria was seen in 71%. The Not Otherwise Specified (NOS) variant was noted in 60% of the cases. Complete remission was observed in 61%, suggesting a possible primary FSGS. Persistent nephrotic proteinuria with a poor response to therapy was noted in 32%, indicating a possible secondary/genetic FSGS, despite adequate immunosuppressive therapy. Therefore, differentiating between primary and secondary forms of FSGS has therapeutic and prognostic implications. Accurate diagnosis of each form of FSGS is vital to avoid unnecessary immunosuppressive-based therapy and establish appropriate treatment. Conclusion: Resistance to steroid therapy was observed in one-third of FSGS patients. It is likely that unrecognised genetic FSGS or secondary FSGS were included among the study group of primary FSGS, leading to misinterpretation of treatment responses in primary FSGS. Hence, a clinicopathological approach for correctly differentiating between primary FSGS, secondary (maladaptive, viral, or toxic) FSGS, and genetic FSGS helps in making correct treatment decisions. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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135. Surgery for Recurrent Epithelial Ovarian Cancer.
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Fotopoulou, Christina, Eriksson, Ane Gerda, Yagel, Itai, Chang, Suk-Joon, and Lim, Myong Cheol
- Abstract
Purpose of Review: To review evidence around the value and challenges of surgery for recurrent epithelial ovarian cancer (ROC). Both cytoreductive and palliative aspects will be addressed Recent Findings: Prospective and retrospective evidence demonstrates a significantly longer remission derived from the combination of surgical and systemic modalities as opposed to systemic treatment alone in carefully selected ROC-patients who have relapsed more than 6 months from the end of their 1st line platinum-based chemotherapy. Nevertheless, this benefit appears to be limited when total macroscopic tumor clearance is not achieved. Selection algorithms to identify optimal surgical candidates are of paramount importance to prevent surgical morbidity without the equivalent oncological benefit. In the palliative setting, the risks and benefits of salvage surgery need to be counterbalanced with the advances of conservative techniques for optimal care. Summary: Well-defined selection algorithms to identify those who will benefit from surgery in the relapsed setting appear to be the key to oncologic and surgical success. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
136. EXPLORANDO EL PASADO A TRAVÉS DE LAS MONEDAS. UNA EXPERIENCIA DE DIVULGACIÓN CON ALUMNADO DE SECUNDARIA.
- Author
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Ruiz López, Ildefonso David
- Abstract
Copyright of Aula de Encuentro is the property of Editorial de la Universidad de Jaen and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2024
- Full Text
- View/download PDF
137. Adjustive Behaviours Performed by Teachers at Secondary Level.
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MUTHUSAMY, P. and MOSHAHID, MOHD.
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SECONDARY education ,TEACHER attitudes ,WORK environment ,STATISTICAL sampling ,ACQUISITION of data - Abstract
In the present study the investigators identified the adjustive behaviours perform by teachers in their working environment because these behaviours are need based one to coping with situation and also to perform their profession in an effective way by make use of available resources in the working environment. The investigators used survey method to collect the data from teacher and used simple random sampling technique to select the samples from target population. Percentage and differential analysis were used to know the level of adjustive behaviour performed by teachers. This study reveals that the teachers performing their adjustive behaviours are found to be high and also they belong to different sex and working in different nature of school to perform same level of adjustive behaviours. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
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138. La enseñanza del fútbol y deportes de invasión en una Educación Física coeducativa en Educación Secundaria. Revisión sistemática.
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Martin-Labrador, Matias, Caballero-Julia, Daniel, and Cuellar-Moreno, Maria
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PHYSICAL education ,GENDER ,TEXT mining ,POWER (Social sciences) ,PSYCHOTHERAPY ,GENDER inequality - Abstract
Copyright of Retos: Nuevas Perspectivas de Educación Física, Deporte y Recreación is the property of Federacion Espanola de Asociaciones de Docentes de Educacion Fisica and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2024
139. The Impact of Two Proposed Strategies Based on Active Learning on Students' Achievement at the Computer and Their Social Intelligence.
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Yousif, Maysam Raad, Ameen, Linda Talib, Jassim, Basim Mohamed, and Majeed, Ban Hassan
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SOCIAL intelligence ,ACTIVE learning ,ACADEMIC achievement ,SCIENCE education ,TEACHER role - Abstract
Active learning is a teaching method that involves students actively participating in activities, exercises, and projects within a rich and diverse educational environment. The teacher plays a role in encouraging students to take responsibility for their own education under their scientific and pedagogical supervision and motivates them to achieve ambitious educational goals that focus on developing an integrated personality for today's students and tomorrow's leaders. It is important to understand the impact of two proposed strategies based on active learning on the academic performance of first-class intermediate students in computer subjects and their social intelligence. The research sample was intentionally selected, consisting of 99 students. The experimental group comprised 33 students from division (B) who were taught according to the first proposed strategy, while the second experimental group, represented by division (A), and also consisted of 33 students. The control group, made up of 33 students from division (C), was taught using the usual method. Two tools have been prepared: an achievement test with 40 items and a measure of social intelligence consisting of 20 items. The research results indicated that the experimental groups, which utilized the first and second proposed strategies based on active learning, outperformed the control group. As a result, several conclusions, recommendations, and proposals were made. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
140. Participación de las familias en los centros de secundaria, de lo institucional a lo transformador.
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HIPÓLITO-RUIZ, Natalia, MARTÍNEZ-MARTÍN, Irene, and BEJARANO-FRANCO, María Teresa
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FAMILY-school relationships ,SOCIAL participation ,PARTICIPATION ,CITIZENSHIP ,SECONDARY education ,FAMILIES ,SOCIAL context ,SECONDARY schools ,ORGANIZATIONAL citizenship behavior - Abstract
Copyright of Pedagogía Social is the property of Pedagogia Social and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2024
- Full Text
- View/download PDF
141. The Emotionally Sensitive Child-Adverse Parenting Experiences-Allostatic (Over)Load (ESCAPE-AL) Model for the Development of Secondary Psychopathic Traits.
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Kimonis, Eva R.
- Subjects
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ADVERSE childhood experiences , *PSYCHOPATHY , *PARENTING , *CONCEPTUAL models - Abstract
Understanding and treatment of antisocial behavior have improved through efforts to subtype individuals based on similar risk factors and outcomes. In particular, the presence of psychopathic traits is associated with distinct etiological factors and antisocial behavior that begins early in life, is aggressive, persistent, and less likely to normalize with traditional treatments, relative to individuals low on psychopathy or its childhood precursor, callous-unemotional (CU) traits. However, important distinctions can be made within individuals with CU/psychopathic traits according to the presence of elevated anxiety symptoms and/or adverse childhood experiences, known as secondary psychopathy/CU traits. This paper provides a broad and brief overview of theory and empirical literature supporting the existence of secondary psychopathy/CU variants as a distinct subtype of childhood antisocial behavior. It outlines the Emotionally Sensitive Child-Adverse Parenting Experiences-Allostatic (Over)Load (ESCAPE-AL) model for the developmental psychopathology of secondary psychopathic/CU traits and discusses research and theory supporting this perspective. Future research directions for testing this conceptual model and its implications for assessing and treating high-risk individuals with secondary CU/psychopathic traits are discussed. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
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142. Major vessel resection for complete cytoreduction in primary advanced and recurrent ovarian malignancies: A case series and systematic review of the literature - pushing the boundaries in oncovascular surgery.
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Uccella, Stefano, Bosco, Mariachiara, Mezzetto, Luca, Garzon, Simone, Maggi, Veronica, Giacopuzzi, Simone, Antonelli, Alessandro, Pinali, Lucia, Zorzato, Pier Carlo, Festi, Anna, Polati, Enrico, Montemezzi, Stefania, De Manzoni, Giovanni, Franchi, Massimo P., and Veraldi, Gian Franco
- Subjects
- *
OVARIAN cancer , *VASCULAR surgery , *CANCER patients , *VENA cava inferior , *CANCER invasiveness , *ILIAC vein , *ILIAC artery - Abstract
Oncovascular surgery (the removal of major blood vessels infiltrated by cancer) is challenging but can be key to achieve complete cytoreduction in patient with advanced ovarian cancer. The aim of this study was to review the literature on oncovascular surgery in ovarian cancer and to report the details of all the cases performed at our institution. We retrospectively reviewed the database of ovarian cancer patients who underwent debulking surgery at the Department of Obstetrics and Gynecology of Verona University between January 2021 and 2023. Patients with at least one major vessel resection during cytoreduction were identified. We then systematically review the literature searching Pubmed and Embase from inception to January 2023 to report all cases of surgery for ovarian cancer with concomitant major vessel resection. Five patients with advanced/recurrent ovarian cancer underwent major vascular resection at our institution. Vascular involvement was preoperatively identified in all cases and no case of vascular resection was performed after accidental injury. The major vessels removed were the inferior vena cava (n = 2), the common iliac veins (n = 2), the external iliac arteries (n = 2), the left common iliac artery (n = 1), and the left external iliac vein (n = 1). All patients underwent other non-gynecological cytoreductive procedures prior to vessel removal and had R0 obtained. Three (60%) patients experienced one or more postoperative complications. The literature search identified a total of seven cases of major vessels resection in ovarian cancer surgery. A single or multiple major vessels were removed in two (28.6%) and five (72.4%) cases, respectively. All the seven patients underwent vascular reconstruction. Four (57.1%) patients reported postoperative complications. Overall, 66.7% of the 12 total identified patients were free from disease at the last follow-up [median 15.5 months (range 5–25)]. Oncovascular surgery is feasible in selected patients with ovarian cancer, provided that a multidisciplinary approach with customized care is available. • Oncovascular surgery is the removal of major blood vessels infiltrated by cancer. • It can be key to achieve complete cytoreduction in advanced ovarian cancer. • It seems to be feasible when performed by a multidisciplinary team of experts. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
143. Successional theories.
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Poorter, Lourens, Amissah, Lucy, Bongers, Frans, Hordijk, Iris, Kok, Jazz, Laurance, Susan G. W., Lohbeck, Madelon, Martínez‐Ramos, Miguel, Matsuo, Tomonari, Meave, Jorge A., Muñoz, Rodrigo, Peña‐Claros, Marielos, and van der Sande, Masha T.
- Subjects
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ECOSYSTEM services , *ECOSYSTEMS , *ECOLOGICAL disturbances , *COMPOSITION of seeds , *PLANT succession , *RESTORATION ecology , *SEED dispersal - Abstract
Succession is a fundamental concept in ecology because it indicates how species populations, communities, and ecosystems change over time on new substrate or after a disturbance. A mechanistic understanding of succession is needed to predict how ecosystems will respond to land‐use change and to design effective ecosystem restoration strategies. Yet, despite a century of conceptual advances a comprehensive successional theory is lacking. Here we provide an overview of 19 successional theories ('models') and their key points, group them based on conceptual similarity, explain conceptual development in successional ideas and provide suggestions how to move forward. Four groups of models can be recognised. The first group (patch & plants) focuses on plants at the patch level and consists of three subgroups that originated in the early 20th century. One subgroup focuses on the processes (dispersal, establishment, and performance) that operate sequentially during succession. Another subgroup emphasises individualistic species responses during succession, and how this is driven by species traits. A last subgroup focuses on how vegetation structure and underlying demographic processes change during succession. A second group of models (ecosystems) provides a more holistic view of succession by considering the ecosystem, its biota, interactions, diversity, and ecosystem structure and processes. The third group (landscape) considers a larger spatial scale and includes the effect of the surrounding landscape matrix on succession as the distance to neighbouring vegetation patches determines the potential for seed dispersal, and the quality of the neighbouring patches determines the abundance and composition of seed sources and biotic dispersal vectors. A fourth group (socio‐ecological systems) includes the human component by focusing on socio‐ecological systems where management practices have long‐lasting legacies on successional pathways and where regrowing vegetations deliver a range of ecosystem services to local and global stakeholders. The four groups of models differ in spatial scale (patch, landscape) or organisational level (plant species, ecosystem, socio‐ecological system), increase in scale and scope, and reflect the increasingly broader perspective on succession over time. They coincide approximately with four periods that reflect the prevailing view of succession of that time, although all views still coexist. The four successional views are: succession of plants (from 1910 onwards) where succession was seen through the lens of species replacement; succession of communities and ecosystems (from 1965 onwards) when there was a more holistic view of succession; succession in landscapes (from 2000 onwards) when it was realised that the structure and composition of landscapes strongly impact successional pathways, and increased remote‐sensing technology allowed for a better quantification of the landscape context; and succession with people (from 2015 onwards) when it was realised that people and societal drivers have strong effects on successional pathways, that ecosystem processes and services are important for human well‐being, and that restoration is most successful when it is done by and for local people. Our review suggests that the hierarchical successional framework of Pickett is the best starting point to move forward as this framework already includes several factors, and because it is flexible, enabling application to different systems. The framework focuses mainly on species replacement and could be improved by focusing on succession occurring at different hierarchical scales (population, community, ecosystem, socio‐ecological system), and by integrating it with more recent developments and other successional models: by considering different spatial scales (landscape, region), temporal scales (ecosystem processes occurring over centuries, and evolution), and by taking the effects of the surrounding landscape (landscape integrity and composition, the disperser community) and societal factors (previous and current land‐use intensity) into account. Such a new, comprehensive framework could be tested using a combination of empirical research, experiments, process‐based modelling and novel tools. Applying the framework to seres across broadscale environmental and disturbance gradients allows a better insight into what successional processes matter and under what conditions. [ABSTRACT FROM AUTHOR]
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- 2023
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144. CULTURAL VALUE ORIENTATION AND SELF-EFFICACY OF SECONDARY SCHOOL STUDENTS IN SOUTHERN EDUCATION ZONE OF CROSS RIVER STATE, NIGERIA.
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BEKOMSON, ACHI NDIFON, CKLAIMZ, ENAMHE DORN, and NGBAN, ANTHONY NTOL
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VALUE orientations ,SECONDARY school students ,CULTURAL values ,SELF-efficacy ,LITERATURE reviews ,CRONBACH'S alpha - Abstract
The main purpose of the study was to find out if cultural value orientation have any influence on selfefficacy with reference to social self-efficacy, academic self-efficacy, language self-efficacy and moral self-efficacy. Literature review was done according to the variables under study. The ex-post facto design was adopted for the study. A sample of 1,586 students was randomly selected from the public secondary schools in Cross River State for the study. A questionnaire titled "Cultural Value Orientation and Self-Efficacy (CVOSEQ) was the instrument used for data collection. The face validity of the instrument was determined by three other research experts educational psychology and measurement and evaluation from the department of Educational Foundations, University of Calabar while the reliability of the instrument was determined using Cronbach Alpha reliability method. The data collected were analyzed using One-way Analysis of Variance tested at .05 level of significance. The result of the analysis revealed that cultural value orientation has a significant influence on social self-efficacy, academic self-efficacy, language self-efficacy, moral self-efficacy and overall self-efficacy. Based on the findings of this study, it was recommended among others that parents should educate the children about their cultural heritage. They should be encouraged to communicate in their local language, dress in their cultural outfits and take part in cultural activities. The school should lay emphasis on promotion of cultural heritage and values so that the child can have an understanding of his origin. [ABSTRACT FROM AUTHOR]
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- 2023
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145. Towards justice-oriented science teaching: examining the impact of the science capital teaching approach on teachers.
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Chowdhuri, Meghna Nag, King, Heather, Godec, Spela, and Archer, Louise
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SCIENCE education , *SCIENCE teachers , *SOCIAL justice , *SECONDARY education , *PRIMARY education - Abstract
While several initiatives for justice-oriented pedagogies have been developed and implemented over the years, there is limited understanding of the ways in which teachers, and their practice, are impacted by these. This article presents data documenting the impact of a pedagogical approach - the science capital teaching approach - on a cohort of teachers. The approach, developed over a period of six years working in close partnership with primary and secondary teachers in England, aimed to support teachers to move towards more equitable and socially just pedagogical practice. This article explores the empirical impact of the approach on teacher practice. The data set comprises the experiences of 43 secondary and 20 Primary school teachers from different geographical regions in England, covering both rural and urban schools. Qualitative data include teacher interviews, observations and discussions and indicate that implementation of the approach resulted in a range of changes: (1) a deepened understanding of, and reflection on, issues of power and equity; (2) greater sharing of authorial roles with students; and (3) stronger relationships of trust between students and teachers. The article concludes by arguing that the implementation of the science capital teaching approach has had a positive effect on teachers and has supported their practice of justice-oriented science teaching. [ABSTRACT FROM AUTHOR]
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- 2023
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146. InfluenCEF study: Clinical phenotype and duration of headache attributed to influenza infection.
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García-Azorín, David, Santana-López, Laura, Lozano-Alonso, José Eugenio, Ordax-Díez, Ana, González-Osorio, Yésica, Rojo-Rello, Silvia, Eiros, José M, Sánchez-Martínez, Javier, Recio-García, Andrea, Sierra-Mencía, Álvaro, Sanz-Muñoz, Ivan, and Guerrero-Peral, Ángel Luis
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HEADACHE , *MIGRAINE , *INFLUENZA , *PRIMARY headache disorders , *CLUSTER headache , *VIRUS diseases , *PHENOTYPES - Abstract
Introduction: Headache is a frequent symptom of infections. We aimed to characterize the clinical phenotype and duration of headache attributed to influenza infection. Methods: Prospective cohort study done in 53 primary care centers between January and April 2023. Patients were included if they had a confirmed influenza diagnosis, were older than 15 years and had a new-onset headache. Patients' demographics, prior medical history, headache phenotype and duration, associated symptoms and patients' outcomes were assessed. The International Classification of Headache Disorders criteria for headache attributed to a systemic viral infection, migraine and tension-type headache were assessed. Results: Of the 478 patients 75 fulfilled eligibility criteria. The mean age was 43, 56% were men, and 27% had a prior headache history. The headache phenotype was a bilateral headache (52%), with frontal topography (48%), pressing quality (61%), moderate intensity, rhinorrhea (79%), nasal congestion (76%), and photophobia (59%). All patients fulfilled headache attributed to acute systemic viral infection criteria, 43% fulfilled migraine criteria and 31% tension-type headache criteria. The median duration of the headache was four (Inter-quartile range: two-six) days. Conclusion: The clinical phenotype of headache attributed to influenza infection was similar to other infections, with more pronounced cranial autonomic symptoms. The headache was an early symptom and was self-limited within a few days. Trial Registration: The study protocol is registered in ClinicalTrial.gov (NCT05704335) [ABSTRACT FROM AUTHOR]
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- 2023
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147. Effectiveness of teen Mental Health First Aid in Improving Teen‐to‐Teen Support Among American Adolescents.
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Wilcox, Holly C., Pas, Elise, Murray, Sarah, Kahn, Geoffrey, DeVinney, Aubrey, Bhakta, Sanjana, Rosenbaum, Lacey, and Hart, Laura M.
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AFFINITY groups , *HIGH schools , *SOCIAL support , *EVALUATION of human services programs , *SCHOOL mental health services , *CONFIDENCE , *CLINICAL trials , *STUDENT assistance programs , *RESEARCH methodology , *MULTIPLE regression analysis , *SOCIAL stigma , *COLLEGE teacher attitudes , *PSYCHOLOGY of teachers , *MENTAL health , *FISHER exact test , *HEALTH literacy , *HUMAN services programs , *T-test (Statistics) , *CHILD psychopathology , *PSYCHOLOGY of high school students , *DESCRIPTIVE statistics , *CHI-squared test , *STUDENT attitudes , *ADOLESCENCE - Abstract
BACKGROUND: teen Mental Health First Aid (tMHFA) is an Australian school‐based universal program for grade 10 to 12 students. tMHFA teaches teens how to recognize and respond to a peer in crisis or experiencing mental health concerns. METHODS: Schools implementing tMHFA in 2019 and 2020 were propensity score matched, yielding a sample of instructors (n = 130) and students (n = 1915) in 44 high schools in 24 American states. Effectiveness and acceptability were assessed with student surveys at baseline and after implementation. RESULTS: There were significant findings for primary outcomes, including improved helpful first aid intentions (Cohen ds = 0.57 to 0.58), confidence supporting a peer (ds = 0.19 to 0.31); the number of adults rated as helpful (ds = 0.37 to 0.44); and reductions in stigmatizing beliefs (ds = 0.21 to 0.40) and "harmful first aid intentions" (ds = 0.11 to 0.42). Instructors and students rated the program favorably with students sharing improvements on their recognition and responses to mental health problems and crises. CONCLUSION: tMHFA is an effective, feasible, and scalable training program for increasing mental health literacy and decreasing mental health stigma in adolescents in the short term, consistent with trials of tMHFA in Australian adolescents. [ABSTRACT FROM AUTHOR]
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- 2023
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148. Student Interview-Informed Behavior Contracts for High School Students Identified as at Risk.
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Schrieber, Stefanie R., Ware, Mary E., and Dart, Evan H.
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EXPERIMENTAL design , *INTERVIEWING , *RISK assessment , *PSYCHOLOGY of high school students , *INTERPROFESSIONAL relations , *STUDENT attitudes , *BEHAVIOR modification , *GOAL (Psychology) , *AGE groups - Abstract
Addressing the challenging behavior of students requires evidence-based interventions that can be implemented in school settings; however, there is a relative lack of literature investigating effective strategies for high school students in secondary settings. Behavior contracts have been used to address challenging behavior in elementary and middle settings but less so in high school settings. Furthermore, the extent to which they have involved student input at the high school level has been unclear despite research indicating that collaborative intervention development processes may be associated with several additional benefits beyond effectiveness. Despite these empirical shortcomings, behavior contracts may be well suited to address individual high school students' challenging behavior given their flexibility, collaborative nature, and use of goal setting and clearly stated contingencies (i.e., rules) to promote behavior change. Thus, the purpose of this study was to evaluate the acceptability and effectiveness of a structured interview-informed behavior contract intervention to address the disruptive behavior of high school students. Specifically, we used a multiple baseline design across three students and found that the interview-informed behavior contracts were effective in increasing their academically engaged behavior (Tau =.62) and decreasing disruptive and passive off-task behavior. Limitations and future directions are discussed. [ABSTRACT FROM AUTHOR]
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- 2023
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149. An Exploration of Middle School Literacy Coaching: A Study of Teachers and Instructional Coaches.
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Shelton, Alexandra, Swanson, Elizabeth, Wexler, Jade, Payne, S. Blair, and Hogan, Erin
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LITERACY ,MIDDLE school teachers ,MIDDLE schools ,TEACHERS ,SECONDARY research - Abstract
Secondary teachers benefit from ongoing coaching to support their implementation of evidence-based literacy practices across content areas. However, several factors may facilitate or impede literacy coaching at the secondary level. We conducted an exploratory survey study to investigate 141 middle school teachers' and 64 instructional coaches' experiences with and perceptions of literacy coaching. Both quantitative and qualitative analyses were used. Findings of the teacher survey revealed that, while most teachers had a literacy coach in their school, many did not receive coaching. In addition, many teachers identified the need for coaching related to providing literacy support to students with disabilities. Meanwhile, findings of the coach survey revealed that many instructional coaches do not provide literacy coaching. However, most coaches reported needing support related to incorporating literacy practices into various content areas. Practical implications and areas for future research related to secondary literacy coaching are discussed. [ABSTRACT FROM AUTHOR]
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- 2023
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150. An Improved Turn Structure for Inducing β-Hairpin Formation in Peptides.
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Li, Xingyue, Sabol, Andrew, Wierzbicki, Michał, Salveson, Patrick, and Nowick, James
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amino acid ,peptides ,peptidomimetics ,β-hairpin ,β-turn ,Circular Dichroism ,Crystallography ,X-Ray ,Nuclear Magnetic Resonance ,Biomolecular ,Ornithine ,Peptides ,Protein Structure ,Secondary ,Solid-Phase Synthesis Techniques - Abstract
Although β-hairpins are widespread in proteins, there is no tool to coax any small peptide to adopt a β-hairpin conformation, regardless of sequence. Here, we report that δ-linked γ(R)-methyl-ornithine (δ MeOrn) provides an improved β-turn template for inducing a β-hairpin conformation in peptides. We developed a synthesis of protected δ MeOrn as a building block suitable for use in Fmoc-based solid-phase peptide synthesis. The synthesis begins with l-leucine and affords gram quantities of the Nα -Boc-Nδ -Fmoc-γ(R)-methyl-ornithine building block. X-ray crystallography confirms that the δ MeOrn turn unit adopts a folded structure in a macrocyclic β-hairpin peptide. CD and NMR spectroscopy allow comparison of the δ MeOrn turn template to the δ-linked ornithine (δ Orn) turn template that we previously introduced and to the popular d-Pro-Gly turn template. These studies show that the folding of the δ MeOrn turn template is substantially better than that of δ Orn and is comparable to d-Pro-Gly.
- Published
- 2021
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