7 results on '"Emily Duan"'
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2. Implications of Spatially Constrained Bipennate Topology on Fluidic Artificial Muscle Bundle Actuation
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Emily Duan and Matthew Bryant
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biomimetic ,pennate topology ,soft actuators ,fluidic artificial muscles ,muscle topology ,Materials of engineering and construction. Mechanics of materials ,TA401-492 ,Production of electric energy or power. Powerplants. Central stations ,TK1001-1841 - Abstract
In this paper, we investigate the design of pennate topology fluidic artificial muscle bundles under spatial constraints. Soft fluidic actuators are of great interest to roboticists and engineers, due to their potential for inherent compliance and safe human–robot interaction. McKibben fluidic artificial muscles are an especially attractive type of soft fluidic actuator, due to their high force-to-weight ratio, inherent flexibility, inexpensive construction, and muscle-like force-contraction behavior. The examination of natural muscles has shown that those with pennate fiber topology can achieve higher output force per geometric cross-sectional area. Yet, this is not universally true for fluidic artificial muscle bundles, because the contraction and rotation behavior of individual actuator units (fibers) are both key factors contributing to situations where bipennate muscle topologies are advantageous, as compared to parallel muscle topologies. This paper analytically explores the implications of pennation angle on pennate fluidic artificial muscle bundle performance with spatial bounds. A method for muscle bundle parameterization as a function of desired bundle spatial envelope dimensions has been developed. An analysis of actuation performance metrics for bipennate and parallel topologies shows that bipennate artificial muscle bundles can be designed to amplify the muscle contraction, output force, stiffness, or work output capacity, as compared to a parallel bundle with the same envelope dimensions. In addition to quantifying the performance trade space associated with different pennate topologies, analyzing bundles with different fiber boundary conditions reveals how bipennate fluidic artificial muscle bundles can be designed for extensile motion and negative stiffness behaviors. This study, therefore, enables tailoring the muscle bundle parameters for custom compliant actuation applications.
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- 2022
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3. Flow cytometric assessment of leukemia-associated monocytes in childhood B-cell acute lymphoblastic leukemia outcome
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Gloria Paz Contreras Yametti, Nikki A Evensen, Jennifer Schloss, Clemence Aldebert, Emily Duan, Yan Zhang, Jiyuan Hu, Tiffany M Chambers, Michael E Scheurer, David T Teachey, Karen R Rabin, Elizabeth A. Raetz, Iannis Aifantis, William L Carroll, and Matthew T Witkowski
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Hematology - Published
- 2023
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4. Six-Month Outcomes in Patients Hospitalized with Severe COVID-19
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Emily Duan, Leora I. Horwitz, Kira Garry, Himali Weerahandi, Felicia Mendoza, Tamara Kahan, Sneha Sharma, Alexander M Prete, Hannah C. Karpel, and Katherine Hochman
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Pediatrics ,medicine.medical_specialty ,Coronavirus disease 2019 (COVID-19) ,Aftercare ,Discharged alive ,Interquartile range ,post-discharge outcomes ,Internal Medicine ,Hospital discharge ,Medicine ,long-COVID ,Humans ,In patient ,Prospective Studies ,Original Research ,business.industry ,SARS-CoV-2 ,COVID-19 ,Mental health ,Patient Discharge ,Hospitalization ,patient-reported outcomes ,Functional status ,Female ,business ,Cohort study - Abstract
Background Previous work has demonstrated that patients experience functional decline at 1–3 months post-discharge after COVID-19 hospitalization. Objective To determine whether symptoms persist further or improve over time, we followed patients discharged after hospitalization for severe COVID-19 to characterize their overall health status and their physical and mental health at 6 months post-hospital discharge. Design Prospective observational cohort study. Participants Patients ≥ 18 years hospitalized for COVID-19 at a single health system, who required at minimum 6 l of supplemental oxygen during admission, had intact baseline functional status, and were discharged alive. Main Measures Overall health status, physical health, mental health, and dyspnea were assessed with validated surveys: the PROMIS® Global Health-10 and PROMIS® Dyspnea Characteristics instruments. Key Results Of 152 patients who completed the 1 month post-discharge survey, 126 (83%) completed the 6-month survey. Median age of 6-month respondents was 62; 40% were female. Ninety-three (74%) patients reported that their health had not returned to baseline at 6 months, and endorsed a mean of 7.1 symptoms. Participants’ summary t-scores in both the physical health and mental health domains at 6 months (45.2, standard deviation [SD] 9.8; 47.4, SD 9.8, respectively) remained lower than their baseline (physical health 53.7, SD 9.4; mental health 54.2, SD 8.0; p
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- 2021
5. 'I Am Not the Same as I Was Before': A Qualitative Analysis of COVID-19 Survivors
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Emily Duan, Kira Garry, Leora I. Horwitz, and Himali Weerahandi
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Applied Psychology - Abstract
Background Little is known about the illness experience of patients’ long-term emotional and physical recovery from severe COVID-19 infection. This study aimed to expand upon the recovery process of COVID-19 survivors up to 6 months after hospital discharge. Methods Qualitative analysis of free-response answers from a cohort study of 152 patients ≥ 18 years hospitalized with laboratory-confirmed SARS-CoV-2 surveyed at 1-month post hospital discharge and 6-months post hospital discharge. Responses were analyzed with a grounded theory approach to identify overarching themes. Results Participants described persistent complications, both physical and mental, that have affected their recovery from COVID-19. Five overarching themes of post-acute patient experiences were generated: (1) an increased awareness of a mind and body connection, (2) feelings of premature aging, (3) an overall decline in quality of life, (4) a continued fear of infection, and (5) methods of coping. Conclusions Patients described lasting changes to their mental health and overall quality of life in connection to physical complications after severe COVID-19 infection. Patients’ reports of their experience call for a greater awareness of the psychological aspects of COVID-19 recovery to provide both physical and psychological rehabilitation services. Additional resources such as education around re-infection and financial resources are needed.
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- 2022
6. The Role of Relapse Specific over-Expression of S100A8/A9 B Leukemic Cells in Promoting Chemoresistance
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Clemence Aldebert, Emily Duan, Sylwia Jasinski, Talia H Ostrow, Isaiah Gonzalez, Aristotelis Tsirigos, Elizabeth A. Raetz, Nikki Ann Evensen, and William L. Carroll
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Immunology ,Cell Biology ,Hematology ,Biochemistry - Published
- 2022
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7. Post-discharge health status and symptoms in patients with severe COVID-19
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Hannah C. Karpel, Kanan Shah, Tamara Kahan, Himali Weerahandi, Caroline Blaum, Katherine Hochman, Leora I. Horwitz, Joshua Chodosh, Sneha Sharma, Emma Simon, Ana Z. Stirniman, Emily Duan, Felicia Mendoza, Jennifer Rutishauser, Kira Garry, Lindsey Quintana, Elias Simon, Savannah Karmen-Tuohy, Alexander M Prete, and Leticia Santos Martinez
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Male ,medicine.medical_specialty ,Coronavirus disease 2019 (COVID-19) ,Post discharge ,Population ,Aftercare ,Discharged alive ,Disease ,01 natural sciences ,Article ,Cohort Studies ,03 medical and health sciences ,0302 clinical medicine ,COVID-19 Testing ,Interquartile range ,Internal medicine ,Internal Medicine ,Humans ,Medicine ,In patient ,030212 general & internal medicine ,Prospective Studies ,0101 mathematics ,Statistics & numerical data ,education ,Prospective cohort study ,Original Research ,Aged ,education.field_of_study ,business.industry ,010102 general mathematics ,COVID-19 ,Middle Aged ,Respiration, Artificial ,Mental health ,Patient Discharge ,Mental Health ,Disease Progression ,Observational study ,Female ,business ,Cohort study - Abstract
BackgroundLittle is known about long-term recovery from severe COVID-19 disease. Here, we characterize overall health, physical health and mental health of patients one month after discharge for severe COVID-19.MethodsThis was a prospective single health system observational cohort study of patients ≥18 years hospitalized with laboratory-confirmed COVID-19 disease who required at least 6 liters of oxygen during admission, had intact baseline cognitive and functional status and were discharged alive. Participants were enrolled between 30 and 40 days after discharge. Outcomes were elicited through validated survey instruments: the PROMIS® Dyspnea Characteristics and PROMIS® Global Health-10.ResultsA total of 161 patients (40.6% of eligible) were enrolled; 152 (38.3%) completed the survey. Median age was 62 years (interquartile range [IQR], 50-67); 57 (37%) were female. Overall, 113/152 (74%) participants reported shortness of breath within the prior week (median score 3 out of 10 [IQR 0-5]), vs. 47/152 (31%) pre-COVID-19 infection (0, IQR 0-1), pConclusionsPatients with severe COVID-19 disease typically experience sequelae affecting their respiratory status, physical health and mental health for at least several weeks after hospital discharge.
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- 2020
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