Design and performance characterization of a hand orthosis prototype to aid activities of daily living in a post-stroke population

2015 ◽  
Author(s):  
Benjamin W. Gasser ◽  
Michael Goldfarb
Keyword(s):  
Activities Of Daily Living ◽  
Daily Living ◽  
Performance Characterization ◽  
Post Stroke ◽  
Stroke Population ◽  
And Performance

Design of a Multigrasp Transradial Prosthesis

2011 ◽  
Vol 5 (3) ◽  
Author(s):  
Tuomas E. Wiste ◽  
Skyler A. Dalley ◽  
H. Atakan Varol ◽  
Michael Goldfarb
Keyword(s):  
Activities Of Daily Living ◽  
Motor Unit ◽  
Daily Living ◽  
Healthy Subjects ◽  
Motor Units ◽  
Prosthetic Hand ◽  
Brushless Motor ◽  
And Performance ◽  
Fingertip Forces

This paper describes the design and performance of a new prosthetic hand capable of multiple grasp configurations, and capable of fingertip forces and speeds comparable to those used by healthy subjects in typical activities of daily living. The hand incorporates four motor units within the palm, which together drive sixteen joints through tendon actuation. Each motor unit consists of a brushless motor that drives one or more tendons through a custom two-way clutch and pulley assembly. After presenting the design of the prosthesis, the paper presents a characterization of the hand’s performance. This includes its ability to provide eight grasp postures, as well as its ability to provide fingertip forces and finger speeds comparable to those described in the biomechanics literature corresponding to activities of daily living.

Design, Installation, and Performance Characterization of a Laboratory-Scale Solar Thermal System for Experiments in Solar Energy Utilization

2012 ◽  
Author(s):  
Stephanie Drozek ◽  
Christopher Damm ◽  
Ryan Enot ◽  
Andrew Hjortland ◽  
Brandon Jackson ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Solar Energy ◽  
Laboratory Scale ◽  
Energy Utilization ◽  
Solar Thermal ◽  
Thermal System ◽  
Performance Characterization ◽  
And Performance ◽  
Solar Thermal System

The purpose of this paper is to describe the implementation of a laboratory-scale solar thermal system for the Renewable Energy Systems Laboratory at the Milwaukee School of Engineering (MSOE). The system development began as a student senior design project where students designed and fabricated a laboratory-scale solar thermal system to complement an existing commercial solar energy system on campus. The solar thermal system is designed specifically for educating engineers. This laboratory equipment, including a solar light simulator, allows for variation of operating parameters to investigate their impact on system performance. The equipment will be utilized in two courses: Applied Thermodynamics, and Renewable Energy Utilization. During the solar thermal laboratories performed in these courses, students conduct experiments based on the American Society of Heating, Refrigeration and Air-Conditioning Engineers (ASHRAE) 93-2010 standard for testing and performance characterization of solar thermal systems. Their measurements are then used to quantify energy output, efficiency and losses of the system and subsystem components.

Interview for Deterioration in Daily Living Activities in Dementia: construct and concurrent validity in patients with mild to moderate dementia

2011 ◽  
Vol 24 (3) ◽  
pp. 382-390 ◽  
Author(s):  
Sebastian Voigt-Radloff ◽  
Rainer Leonhart ◽  
Matthias Schützwohl ◽  
Luisa Jurjanz ◽  
Thomas Reuster ◽  
...  
Keyword(s):  
Activities Of Daily Living ◽  
Internal Consistency ◽  
Concurrent Validity ◽  
Daily Living ◽  
Factor Model ◽  
Cognitive Testing ◽  
Daily Living Activities ◽  
Moderate Dementia ◽  
Dementia Research ◽  
And Performance

ABSTRACTBackground: The purpose of the study was to translate the Interview for Deterioration in Daily Living Activities in Dementia (IDDD) into German and to evaluate the construct and concurrent validity in people with mild to moderate dementia.Methods: IDDD data of two pooled samples (n = 301) were analyzed regarding ceiling and bottom effects, internal consistency, factor reliability and correlations with corresponding scales on cognition and activities of daily living.Results: We found minimal bottom (< 5%) and ceiling (≤ 2%) effects, good internal consistency (Cronbach's α > 0.7) and moderate to good factor reliability (0.66–0.87). Low correlations with cognition (Pearson coefficient: < 0.17) confirmed the differences between cognitive testing and activities of daily living (ADL). Minor correlations with other ADL scores (r < 0.2) indicated that different scores cover a different range of ADLs. The original two factor model could not be confirmed. A suggested four factor model distinguishing initiative and performance of basic and instrumental ADL demonstrated better indices of fit and higher correlations with corresponding scales.Conclusion: A four factor model of the IDDD can be used in dementia research for assessing initiative in and performance of basic and household activities of daily living. The findings suggest that ADL scales correlate only poorly and that further development of the IDDD is needed to cover a broader range of ADLs.

scholarly journals Assessment of Motor Activities of Daily Living: Spanish Cross-Cultural Adaptation, Reliability and Construct Validity of the DCDDaily-Q

2020 ◽  
Vol 17 (13) ◽  
pp. 4802 ◽  
Author(s):  
Laura Delgado-Lobete ◽  
Rebeca Montes-Montes ◽  
Berdien W. van der Linde ◽  
Marina M. Schoemaker
Keyword(s):  
Construct Validity ◽  
Activities Of Daily Living ◽  
Internal Consistency ◽  
Daily Living ◽  
Developmental Coordination Disorder ◽  
Culturally Adapted ◽  
Confirmatory Factor ◽  
Motor Activities ◽  
And Performance ◽  
Coordination Disorder

The DCDDaily-Q is an instrument that aims to comprehensively assess motor performance in a broad range of activities of daily living (ADL) and to identify risk of Developmental Coordination Disorder (DCD) in children. The aim of this study was to cross-culturally adapt the DCDDaily-Q into European Spanish (DCDDaily-Q-ES) and to test its psychometric properties in Spanish 5 to 10 year old children. The DCDDaily-Q was translated and cross-culturally adapted into Spanish following international guidelines. Two-hundred and seventy-six parents of typically developing Spanish children completed the final version of the DCDDaily-Q-ES (M = 7.5 years, SD = 1.7; girls = 50%). Confirmatory Factor Analysis (CFA), internal consistency, and corrected item-total correlations were conducted to test construct validity, internal consistency, and homogeneity of the DCDDaily-Q-ES. The DCDDaily-Q-ES achieved good semantic, conceptual, and cultural equivalence. CFA supported construct validity of the DCDDaily-Q-ES. Reliability values were also good (Cronbach’s alpha = 0.703–0.843; corrected item-total correlations = 0.262–0.567). This is the first study to cross-culturally adapt and examine the DCDDaily-Q outside the Netherlands. The findings suggest that the DCDDaily-Q-ES is a reliable and valid measure to assess learning, participation, and performance in a broad range of ADL.

Fabrication and performance characterization of the membrane from self-dispersed gelatin-coupled cellulose microgels

Cellulose ◽  
2019 ◽  
Vol 26 (5) ◽  
pp. 3255-3269 ◽  
Author(s):  
Yijun Yao ◽  
Hongru Wang ◽  
Ruirui Wang ◽  
Yong Chai ◽  
Wanli Ji
Keyword(s):  
Performance Characterization ◽  
And Performance
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