7 results on '"Michaelidou E"'
Search Results
2. The geometrical model of number line as a representation of equivalence and addition of fractions
- Author
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Michaelidou, E., Gagatsis, Athanasios, and Gagatsis, Athanasios [0000-0002-7996-0041]
- Abstract
Images et représentations géométriques sont utilisées dans l'enseignement des mathématiques en vue d'améliorer la compréhension (Gagatsis, & Patronis, 1990). La ligne des nombres est une représentation géométrique utilisée dans l'enseignement pour représenter les nombres entiers, les nombres rationnels et les opérations pouvant être effectuées avec ces nombres. Les résultats de recherche portant sur la contribution de représentation spécifique de l'enseignement des fractions ne convergent pas nécessairement. Ainsi, certains résultats avancent que l'utilisation de la ligne des nombres peut occasionner dans certains cas des difficultés additionnelles pour les élèves ne conceptualisant pas de la même manière que le modèle encode les informations (Behr, Lesh, Post, & Silver, 1983; Bright, Behr, Post, & Wachsmuth, 1988; Michaelidou, 2003). D'autres à l'opposé prouvent que l'utilisation de la ligne de nombres (a) augmente la compréhension du concept du nombre ainsi que le développement de la connaissance spécifique relative aux fractions (Keijzer, 2003; Keijzer, & Terwel, 2000; Keijzer, & Terwel, 2001) et (b) qu'il permet -en tant qu'instrument d'évaluation- de tracer les conceptions erronées d'élèves (Behr, Wachmouth, Post, & Lesh, 1984; Ni, 2000). L'étude présente analyse l'utilité de la ligne de nombres comme moyen de représentation d'équivalence et d'addition de fractions. 42 2 185 204 ID: 197394959
- Published
- 2005
3. Improved childhood asthma control after exposure reduction interventions for desert dust and anthropogenic air pollution: the MEDEA randomised controlled trial.
- Author
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Kouis P, Galanakis E, Michaelidou E, Kinni P, Michanikou A, Pitsios C, Perez J, Achilleos S, Middleton N, Anagnostopoulou P, Dimitriou H, Revvas E, Stamatelatos G, Zacharatos H, Savvides C, Vasiliadou E, Kalivitis N, Chrysanthou A, Tymvios F, Papatheodorou SI, Koutrakis P, and Yiallouros PK
- Subjects
- Humans, Child, Male, Female, Cyprus, Particulate Matter analysis, Particulate Matter adverse effects, Air Pollution adverse effects, Air Pollution analysis, Environmental Exposure adverse effects, Environmental Exposure prevention & control, Greece, Air Filters, Air Pollution, Indoor adverse effects, Air Pollution, Indoor prevention & control, Nitric Oxide analysis, Air Pollutants analysis, Air Pollutants adverse effects, Forced Expiratory Volume, Asthma prevention & control, Dust
- Abstract
Introduction: Elevated particulate matter (PM) concentrations of anthropogenic and/or desert dust origin are associated with increased morbidity among children with asthma., Objective: The Mitigating the Health Effects of Desert Dust Storms Using Exposure-Reduction Approaches randomised controlled trial assessed the impact of exposure reduction recommendations, including indoor air filtration, on childhood asthma control during high desert dust storms (DDS) season in Cyprus and Greece., Design, Participants, Interventions and Setting: Primary school children with asthma were randomised into three parallel groups: (a) no intervention (controls); (b) outdoor intervention (early alerts notifications, recommendations to stay indoors and limit outdoor physical activity during DDS) and (c) combined intervention (same as (b) combined with indoor air purification with high efficiency particulate air filters in children's homes and school classrooms. Asthma symptom control was assessed using the childhood Asthma Control Test (c-ACT), spirometry (forced expiratory volume in 1 s (FEV1), forced vital capacity (FVC)) and fractional exhaled nitric oxide (FeNO)., Results: In total, 182 children with asthma (age; mean=9.5, SD=1.63) were evaluated during 2019 and 2021. After three follow-up months, the combined intervention group demonstrated a significant improvement in c-ACT in comparison to controls (β=2.63, 95% CI 0.72 to 4.54, p=0.007), which was more profound among atopic children (β=3.56, 95% CI 0.04 to 7.07, p=0.047). Similarly, FEV1% predicted (β=4.26, 95% CI 0.54 to 7.99, p=0.025), the need for any asthma medication and unscheduled clinician visits, but not FVC% and FeNO, were significantly improved in the combined intervention compared with controls., Conclusion: Recommendations to reduce exposure and use of indoor air filtration in areas with high PM pollution may improve symptom control and lung function in children with asthma., Trial Registration Number: NCT03503812., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2024. No commercial re-use. See rights and permissions. Published by BMJ.)
- Published
- 2024
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4. Responses of schoolchildren with asthma to recommendations to reduce desert dust exposure: Results from the LIFE-MEDEA intervention project using wearable technology.
- Author
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Kouis P, Michanikou A, Galanakis E, Michaelidou E, Dimitriou H, Perez J, Kinni P, Achilleos S, Revvas E, Stamatelatos G, Zacharatos H, Savvides C, Vasiliadou E, Kalivitis N, Chrysanthou A, Tymvios F, Papatheodorou SI, Koutrakis P, and Yiallouros PK
- Subjects
- Child, Humans, Dust prevention & control, Schools, Communication, Asthma prevention & control, Asthma epidemiology, Wearable Electronic Devices
- Abstract
Current public health recommendations for desert dust storms (DDS) events focus on vulnerable population groups, such as children with asthma, and include advice to stay indoors and limit outdoor physical activity. To date, no scientific evidence exists on the efficacy of these recommendations in reducing DDS exposure. We aimed to objectively assess the behavioral responses of children with asthma to recommendations for reduction of DDS exposure. In two heavily affected by DDS Mediterranean regions (Cyprus & Crete, Greece), schoolchildren with asthma (6-11 years) were recruited from primary schools and were randomized to control (business as usual scenario) and intervention groups. All children were equipped with pedometer and GPS sensors embedded in smartwatches for objective real-time data collection from inside and outside their classroom and household settings. Interventions included the timely communication of personal DDS alerts accompanied by exposure reduction recommendations to both the parents and school-teachers of children in the intervention group. A mixed effect model was used to assess changes in daily levels of time spent, and steps performed outside classrooms and households, between non-DDS and DDS days across the study groups. The change in the time spent outside classrooms and homes, between non-DDS and DDS days, was 37.2 min (p
value = 0.098) in the control group and -62.4 min (pvalue < 0.001) in the intervention group. The difference in the effects between the two groups was statistically significant (interaction pvalue < 0.001). The change in daily steps performed outside classrooms and homes, was -495.1 steps (pvalue = 0.350) in the control group and -1039.5 (pvalue = 0.003) in the intervention group (interaction pvalue = 0.575). The effects on both the time and steps performed outside were more profound during after-school hours. To summarize, among children with asthma, we demonstrated that timely personal DDS alerts and detailed recommendations lead to significant behavioral changes in contrast to the usual public health recommendations., Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Panayiotis K. Yiallouros reports financial support was provided by European Commission., (Copyright © 2022 Elsevier B.V. All rights reserved.)- Published
- 2023
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5. Pediatric asthma symptom control during lockdown for the COVID-19 pandemic in Spring 2020: A prospective community-based study in Cyprus and Greece.
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Kouis P, Michaelidou E, Kinni P, Michanikou A, Anagnostopoulou P, Dimitriou H, Karanicolas K, Matthaiou AM, Achilleos S, Papatheodorou SI, Koutrakis P, Middleton N, Galanakis E, and Yiallouros PK
- Subjects
- Child, Communicable Disease Control, Cyprus epidemiology, Greece epidemiology, Humans, Pandemics, Prospective Studies, SARS-CoV-2, Asthma drug therapy, Asthma epidemiology, COVID-19
- Abstract
Objectives: To prospectively quantify at the community level changes in asthma symptom control and other morbidity indices, among asthmatic schoolchildren in response to coronavirus disease 2019 (COVID-19) lockdown measures., Methods: In Spring 2019 and Spring 2020, we prospectively assessed monthly changes in pediatric asthma control test (c-ACT), asthma medication usage, infections and unscheduled visits for asthma among schoolchildren with active asthma in Cyprus and Greece. We compared asthma symptom control and other morbidity indices before and during lockdown measures, while participants' time spent at home was objectively assessed by wearable sensors., Results: A total of 119 asthmatic children participated in the study during Spring 2020. Compared to a mean baseline (pre-COVID-19 lockdown) c-ACT score of 22.70, adjusted mean increases of 2.58 (95% confidence interval [CI]: 1.91, 3.26, p < 0.001) and 3.57 (95% CI: 2.88, 4.27, p < 0.001) in the 2nd and 3rd monthly assessments were observed after implementation of lockdown measures. A mean increase in c-ACT score of 0.32 (95% CI: 0.17, 0.47, p < 0.001) was noted per 10% increase in the time spent at home. Improvement was more profound in children with severe asthma, while significant reductions in infections, asthma medication usage and unscheduled visits for asthma were also observed. During Spring 2019, 39 children participated in the study in the absence of lockdown measures and no changes in c-ACT or other indices of disease severity were observed., Conclusions: Clinically meaningful improvements in asthma symptom control, among asthmatic schoolchildren were observed during the COVID-19 lockdown measures in Spring 2020. Improvements were independently associated with time spent at home and were more profound in the children with severe asthma., (© 2021 Wiley Periodicals LLC.)
- Published
- 2022
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6. Use of wearable sensors to assess compliance of asthmatic children in response to lockdown measures for the COVID-19 epidemic.
- Author
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Kouis P, Michanikou A, Anagnostopoulou P, Galanakis E, Michaelidou E, Dimitriou H, Matthaiou AM, Kinni P, Achilleos S, Zacharatos H, Papatheodorou SI, Koutrakis P, Nikolopoulos GK, and Yiallouros PK
- Subjects
- Adolescent, Asthma diagnosis, Child, Child, Preschool, Cyprus, Female, Greece, Humans, Male, Monitoring, Physiologic instrumentation, Public Health Surveillance, Severity of Illness Index, Social Mobility, Asthma epidemiology, COVID-19 epidemiology, Monitoring, Physiologic methods, SARS-CoV-2, Wearable Electronic Devices
- Abstract
Between March and April 2020, Cyprus and Greece health authorities enforced three escalated levels of public health interventions to control the COVID-19 pandemic. We quantified compliance of 108 asthmatic schoolchildren (53 from Cyprus, 55 from Greece, mean age 9.7 years) from both countries to intervention levels, using wearable sensors to continuously track personal location and physical activity. Changes in 'fraction time spent at home' and 'total steps/day' were assessed with a mixed-effects model adjusting for confounders. We observed significant mean increases in 'fraction time spent at home' in Cyprus and Greece, during each intervention level by 41.4% and 14.3% (level 1), 48.7% and 23.1% (level 2) and 45.2% and 32.0% (level 3), respectively. Physical activity in Cyprus and Greece demonstrated significant mean decreases by - 2,531 and - 1,191 (level 1), - 3,638 and - 2,337 (level 2) and - 3,644 and - 1,961 (level 3) total steps/day, respectively. Significant independent effects of weekends and age were found on 'fraction time spent at home'. Similarly, weekends, age, humidity and gender had an independent effect on physical activity. We suggest that wearable technology provides objective, continuous, real-time location and activity data making possible to inform in a timely manner public health officials on compliance to various tiers of public health interventions during a pandemic.
- Published
- 2021
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7. Impact of estrogen receptor α gene and oxytocin receptor gene polymorphisms on female sexuality.
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Armeni AK, Assimakopoulos K, Marioli D, Koika V, Michaelidou E, Mourtzi N, Iconomou G, and Georgopoulos NA
- Abstract
Over the past decades, research attention has increasingly been paid to the neurobiological component of sexual behavior. The aim of the present study was to investigate the correlation of estrogen receptor α (ERA) gene polymorphism (rs2234693-PvuII) (T→C substitution) and oxytocin receptor gene polymorphism (rs53576) (G→A substitution) with sexuality parameters of young, healthy women. One hundred thirty-three Greek heterosexual women, students in higher education institutions, 20-25 years of age, sexually active, with normal menstrual cycles (28-35 days), were recruited in the study. Exclusion criteria were chronic and/or major psychiatric diseases, use of oral contraceptive pills (OCs), polycystic ovary syndrome (PCOS), thyroid diseases as well as drugs that are implicated in hypothalamus-pituitary-gonadal axis. T allele (wildtype) of rs2234693 (PvuII) polymorphism of ERA gene was correlated with increased levels of arousal and lubrication, whereas A allele (polymorphic) of rs53576 (OXTR) polymorphism was correlated with increased arousal levels. The simultaneous presence of both T allele of rs2234693 (PvuII) and A allele of rs53576 (OXTR) polymorphisms (T + A group) was correlated with increased arousal, orgasm levels as well as female sexual function index full score. To our knowledge, this is the first study to investigate the interaction between ERA and OXTR with regard to sexual function in women. Female sexuality is a complex behavioral trait that encompasses both biological and psychological components. It seems that variability in female sexual response stems from genetic variability that characterizes endocrine, neurotransmitter and central nervous system influences., (© 2017 The authors.)
- Published
- 2017
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