Analysis upper limb EMG and time factor analysis between Kendo head strike types

2021 ◽  
Vol 30 (2) ◽  
pp. 967-975
Author(s):  
Sang-Hyup Choi ◽  
Yong-Gwan Song
Keyword(s):  
Factor Analysis ◽  
Upper Limb ◽  
Time Factor

scholarly journals Structural validity and reliability of the patient experience measure: A new approach to assessing psychosocial experience of upper limb prosthesis users

PLoS ONE ◽  
2021 ◽  
Vol 16 (12) ◽  
pp. e0261865
Author(s):  
Linda J. Resnik ◽  
Mathew L. Borgia ◽  
Melissa A. Clark ◽  
Emily Graczyk ◽  
Jacob Segil ◽  
...  
Keyword(s):  
Factor Analysis ◽  
Social Interaction ◽  
Differential Item Functioning ◽  
Patient Experience ◽  
Upper Limb ◽  
Validity And Reliability ◽  
Structural Validity ◽  
Large Sample ◽  
Item Functioning ◽  
Experience Measure

Recent advances in upper limb prosthetics include sensory restoration techniques and osseointegration technology that introduce additional risks, higher costs, and longer periods of rehabilitation. To inform regulatory and clinical decision making, validated patient reported outcome measures are required to understand the relative benefits of these interventions. The Patient Experience Measure (PEM) was developed to quantify psychosocial outcomes for research studies on sensory-enabled upper limb prostheses. While the PEM was responsive to changes in prosthesis experience in prior studies, its psychometric properties had not been assessed. Here, the PEM was examined for structural validity and reliability across a large sample of people with upper limb loss (n = 677). The PEM was modified and tested in three phases: initial refinement and cognitive testing, pilot testing, and field testing. Exploratory factor analysis (EFA) was used to discover the underlying factor structure of the PEM items and confirmatory factor analysis (CFA) verified the structure. Rasch partial credit modeling evaluated monotonicity, fit, and magnitude of differential item functioning by age, sex, and prosthesis use for all scales. EFA resulted in a seven-factor solution that was reduced to the following six scales after CFA: social interaction, self-efficacy, embodiment, intuitiveness, wellbeing, and self-consciousness. After removal of two items during Rasch analyses, the overall model fit was acceptable (CFI = 0.973, TLI = 0.979, RMSEA = 0.038). The social interaction, self-efficacy and embodiment scales had strong person reliability (0.81, 0.80 and 0.77), Cronbach’s alpha (0.90, 0.80 and 0.71), and intraclass correlation coefficients (0.82, 0.85 and 0.74), respectively. The large sample size and use of contemporary measurement methods enabled identification of unidimensional constructs, differential item functioning by participant characteristics, and the rank ordering of the difficulty of each item in the scales. The PEM enables quantification of critical psychosocial impacts of advanced prosthetic technologies and provides a rigorous foundation for future studies of clinical and prosthetic interventions.

Subjective Workload Assessment during 48 Continuous Hours of LOS-F-H Operations

1989 ◽  
Vol 33 (16) ◽  
pp. 1129-1133 ◽  
Author(s):  
Susan G. Hill ◽  
James C. Byers ◽  
Allen L. Zaklad ◽  
Richard E. Christ
Keyword(s):  
Factor Analysis ◽  
Motion Sickness ◽  
Rating Scales ◽  
Time Factor ◽  
Subjective Rating ◽  
Regression Analyses ◽  
Task Load ◽  
Subjective Workload ◽  
Operator Workload

Two operator workload (OWL) subjective rating scales were used to obtain judgments of workload during 48 hours of operation. The Task Load Index (TLX) and Overall Workload (OW) scales were administered to two crews during 48-hour operations. A 16-item symptoms ratings scale was also administered to investigate motion sickness and other physical ailments. Results indicated that workload increases across time. Factor analysis on the symptoms found three significant: (1) Heat; (2) Eyestrain/Headache; and (3) Allergy/Dust. Regression analyses suggest that OWL scores can be described as a combination of hour into mission and job being performed. These findings are discussed in the context of a methodology for assessing OWL.

scholarly journals FAKTOR-FAKTOR YANG MEMPENGARUHI KEPUASAN PELANGGAN PADA JASA TRANSPORTASI PERUSAHAAN OTOBUS BUDIMAN JURUSAN TASIKMALAYA-CIKARANG

2021 ◽  
Vol 6 (2) ◽  
pp. 16-27
Author(s):  
Rismawati ◽  
Ina Ratnasari
Keyword(s):  
Factor Analysis ◽  
Customer Satisfaction ◽  
Travel Time ◽  
Safety Factor ◽  
Public Transportation ◽  
Travel Cost ◽  
Time Factor ◽  
Transportation Services ◽  
Cost Factor ◽  
Analysis Technique

Tujuan dari penelitian  ini adalah untuk menguji dan menganalisis faktor-faktor apa saja yang mempengaruhi kepuasan pelanggan pada jasa transportasi perusahaan otobus budiman jurusan tasikmalaya-cikarang.  Faktor-faktor yang akan dianalisis dalam penelitian ini adalah faktor biaya perjalanan, faktor waktu perjalanan, faktor waktu tunggu, faktor aksesibilitas, faktor kesesuaian, faktor keamanan/keselamatan.  Hasil penelitian yang diperoleh dari uji analisis faktor menunjukkan bahwa diperoleh 3 faktor yang berpengaruh paling dominan terhadap kepuasan pelanggan dalam memilih angkutan jasa transportasi umum bus budiman jurusan tasikmalaya-cikarang.  faktor-faktor tersebut adalah : faktor biaya perjalanan 36,59%, faktor waktu perjalanan 12,86%, faktor keamanan/keselamatan 7,422%. Faktor yang paling dominan mempengaruhi kepuasan pelanggan adalah faktor biaya perjalanan, faktor waktu perjalanan dan faktor keamanan/keselamatan.  sedangkan sisanya dipengaruhi oleh faktor lain yang tidak diteliti. Kata Kunci : Analisis Faktor, Jasa Transportasi Umum, kepuasan Pelanggan.   The purpose of this study is to examine and analyze the factors that affect customer satisfaction in the transportation services of the Budiman bus company, majoring in Tasikmalaya-Cikarang.  The factors that will be analyzed in this study are the travel cost factor, the travel time factor, the waiting time factor, the accessibility factor, the suitability factor, the security/safety factor. The data were obtained from distributing questionnaires to 277 respondents who used the Budiman bus majoring in Tasikmalaya-Cikarang. The data analysis technique used is the scale range technique and the factor analysis technique.  The results of the research obtained from the factor analysis test showed that there were 3 factors that had the most dominant influence on customer satisfaction in choosing public transportation services, the Budiman bus majoring in Tasikmalaya-Cikarang. These factors are: travel cost factor 36.59%, travel time factor 12.86%, security/safety factor 7.422%. The most dominant factors affecting customer satisfaction are travel costs, travel time factors and security/safety factors. while the rest is influenced by other factors not examined. Keywords: Factor Analysis, Public Transportation Services, Customer Satisfaction  

scholarly journals Muscle Synergies and Clinical Outcome Measures Describe Different Factors of Upper Limb Motor Function in Stroke Survivors Undergoing Rehabilitation in a Virtual Reality Environment

Sensors ◽  
2021 ◽  
Vol 21 (23) ◽  
pp. 8002
Author(s):  
Lorenza Maistrello ◽  
Daniele Rimini ◽  
Vincent C. K. Cheung ◽  
Giorgia Pregnolato ◽  
Andrea Turolla
Keyword(s):  
Factor Analysis ◽  
Regression Model ◽  
Upper Limb ◽  
Motor Impairment ◽  
Muscle Synergy ◽  
Muscle Synergies ◽  
Clinical Scales ◽  
Clinical Variables ◽  
Rehabilitation Protocols ◽  
General Linear Regression Model

Recent studies have investigated muscle synergies as biomarkers for stroke, but it remains controversial if muscle synergies and clinical observation convey the same information on motor impairment. We aim to identify whether muscle synergies and clinical scales convey the same information or not. Post-stroke patients were administered an upper limb treatment. Before (T0) and after (T1) treatment, we assessed motor performance with clinical scales and motor output with EMG-derived muscle synergies. We implemented an exploratory factor analysis (EFA) and a confirmatory factor analysis (CFA) to identify the underlying relationships among all variables, at T0 and T1, and a general linear regression model to infer any relationships between the similarity between the affected and unaffected synergies (Median-sp) and clinical outcomes at T0. Clinical variables improved with rehabilitation whereas muscle-synergy parameters did not show any significant change. EFA and CFA showed that clinical variables and muscle-synergy parameters (except Median-sp) were grouped into different factors. Regression model showed that Median-sp could be well predicted by clinical scales. The information underlying clinical scales and muscle synergies are therefore different. However, clinical scales well predicted the similarity between the affected and unaffected synergies. Our results may have implications on personalizing rehabilitation protocols.

scholarly journals FACTOR ANALYSIS OF UPPER LIMB PROSTHETIC ACCEPTANCE FROM RETROSPECTIVE PROSTHETIC CLINICIAN SURVEY

2018 ◽  
Author(s):  
Gerald E. Stark
Keyword(s):  
Factor Analysis ◽  
Upper Limb ◽  
Meta Analysis ◽  
Ease Of Use ◽  
Factors Affecting ◽  
National Assembly ◽  
Amputation Level ◽  
Practitioner Survey ◽  
Functional Advantage ◽  
Median Rating

INTRODUCTION Upper limb prosthetic acceptance seems to be relatively unchanged from 1958 where it was measured to be 75% for transradial, 61% for transhumeral, and 35% for shoulder disarticulation levels. A practitioner survey from 2013 by the author found this to be largely unchanged at 79.6%, 57.8%, and 32.8% respectively. An upper limb meta-analysis showed that the most significant factors affecting prosthetic rejection using a median rating were function, comfort, ease of use, weight, heat, lack of sensory feedback, inconvenience, lifestyle, dissatisfaction with technology, irritation, and availability of services. An earlier survey by the author condensed these factors of rejection to amputation level, functional advantage, and comfort, and included confidence of the prosthetist, availability of therapy, and support of the patient context. Also it was speculated that the value of factors influencing rejection of prostheses may not be simply the converse of those accepting the prosthesis but different scales. Abstract PDF  Link: https://jps.library.utoronto.ca/index.php/cpoj/article/view/32045/24459 How to cite: Stark G E.  FACTOR ANALYSIS OF UPPER LIMB PROSTHETIC ACCEPTANCE FROM RETROSPECTIVE PROSTHETIC CLINICIAN SURVEY. CANADIAN PROSTHETICS & ORTHOTICS JOURNAL, VOLUME 1, ISSUE 2, 2018; ABSTRACT, ORAL PRESENTATION AT THE AOPA’S 101ST NATIONAL ASSEMBLY, SEPT. 26-29, VANCOUVER, CANADA, 2018. DOI: https://doi.org/10.33137/cpoj.v1i2.32045 Abstracts were Peer-reviewed by the American Orthotic Prosthetic Association (AOPA) 101st National Assembly Scientific Committee.  http://www.aopanet.org/

scholarly journals TRANSPORT OF THE VERY SMALL INFANT: TIME FACTOR ANALYSIS

1974 ◽  
Vol 8 (4) ◽  
pp. 444-444
Author(s):  
Leandro Cordero ◽  
Pamela D'huyvetter ◽  
Bruce D Graham
Keyword(s):  
Factor Analysis ◽  
Time Factor ◽  
Small Infant

Reflex Responses in Upper Limb Muscles to Cutaneous Stimuli

1993 ◽  
Vol 20 (04) ◽  
pp. 271-278 ◽  
Author(s):  
R. Chen
Keyword(s):  
Stimulus Intensity ◽  
Upper Limb ◽  
Healthy Subjects ◽  
Voluntary Contraction ◽  
Cutaneous Reflexes ◽  
Focal Lesions ◽  
Normal Ranges ◽  
Conduction Velocities ◽  
Limb Muscles ◽  
Biphasic Responses

ABSTRACT:Cutaneous reflexes in the upper limb were elicited by stimulating digital nerves and recorded by averaging rectified EMG from proximal and distal upper limb muscles during voluntary contraction. Distal muscles often showed a triphasic response: an inhibition with onset about 50 ms (Il) followed by a facilitation with onset about 60 ms (E2) followed by another inhibition with onset about 80 ms (12). Proximal muscles generally showed biphasic responses beginning with facilitation or inhibition with onset at about 40 ms. Normal ranges for the amplitude of these components were established from recordings on 22 arms of 11 healthy subjects. An attempt was made to determine the alterent fibers responsible for the various components by varying the stimulus intensity, by causing ischemic block of larger fibers and by estimating the afferent conduction velocities. The central pathways mediating these reflexes were examined by estimating central delays and by studying patients with focal lesions

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