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    Wyświetlanie 1-13 z 13
    Tytuł:
    Isometric Pull and Push Strengths of Paraplegics in the Workspace: 1. Strength Measurement Profiles
    Autorzy:
    Das, B.
    Black, N. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/90074.pdf
    Data publikacji:
    2000
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    isometric strength
    measurement
    pull and push strengths
    workspace
    reach envelopes
    paraplegics
    pomiary
    ciągnięcie
    pchanie
    siła mięśni
    praca mięśni
    Opis:
    The isometric strength profiles of male and female paraplegics were determined for pull and push strengths in the normal, maximum, and extreme working reach envelopes. A computerized isometric strength measurement system was designed and constructed for the purpose. The strongest pull location was at extreme reach vertically above the shoulder and the strength values for males and females were 473 and 318 newtons (N), respectively. The strongest push location was at maximum reach, at vertical ($) angle of 45° and at horizontal (6) angle of 45° for males and at 0° for women and the strength values were 235 and 172 N, respectively. The nature of the strength profiles was found to be similar for both the sexes. The pull and push strengths of the female were 77 and 68% that of the male, respectively.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2000, 6, 1; 47-65
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Isometric Pull and Push Strengths of Paraplegics in the Workspace: 2. Statistical Analysis of Spatial Factors
    Autorzy:
    Das, B.
    Black, N. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/89871.pdf
    Data publikacji:
    2000
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    isometric strength
    pull and push strengths
    workspace reach levels
    horizontal and vertical angles
    paraplegics
    analiza statystyczna
    siła mięśni
    praca mięśni
    Opis:
    The effect of reach levels, horizontal angles, and vertical angles on isometric pull and push strengths of male and female was determined. Highly significant increases in men’s push strength were found between extreme to maximum reaches, and from extreme to normal reaches. However, for women’s push strength, a significant increase was found only between extreme to maximum reach. Significant or highly significant increases were found in men’s and women’s pull strength between the horizontal angle (0) sagittal through the active shoulder (90°) and other angles (0, 45, and 135°). However, for men’s push strength, highly significant increases were found between the horizontal angle 45° from the frontal plane, and other angles. For women’s push strength, significant or highly significant increases were found between the horizontal angles 0° and angles of 90 and 135°. For men’s and women’s pull strength, significant or highly significant increases were found between the vertical angle (), 90°, and other angles (-20, 0, and 45°). Similar increases were found for women’s push strength between the 45° angle and other angles. In the design of a workstation for paraplegics that requires pull and push forces, consideration must be given to the spatial factors.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2000, 6, 1; 67-80
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Prescriptive Exercise Program for Health Maintenance
    Autorzy:
    Yamashita, A.
    Kawakami, M.
    Inagaki, Y.
    Ohkubo, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/89896.pdf
    Data publikacji:
    2001
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    health maintenance
    prescriptive exercise program
    aging society
    heart rate
    relative metabolic rate
    myoelectric potential
    starsi pracownicy
    fizjologia
    praca mięśni
    wydolność
    zdolność fizyczna
    metabolizm
    Opis:
    The aim of this study was to design a prescriptive exercise program for people of various age and fitness basing on the popular in Japan Radio Physical Fitness Exercise, a program based on an experimental approach. The evaluation indices used in the experiment were heart rate (HR), oxygen consumption, and electrical activity of the rectus femoris, latissimus dorsi, and trapezius muscles, which measured during various motion elements of the program performed at various rate. The results of this study enable to calculate equations for predicting HR during exercise from relative metabolic rate (RMR). The data on HR, RMR, and myoelectric potential presented in this study may be a basis for designing individual exercise programs for elderly people.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2001, 7, 2; 195-209
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of the Musculoskeletal Load of the Trapezius and Deltoid Muscles During Hand Activity
    Autorzy:
    Roman-Liu, D.
    Tokarski, T.
    Kamińska, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/91179.pdf
    Data publikacji:
    2001
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    electromyography
    muscle fatigue
    precision work
    hand activities
    choroby narządów ruchu
    fizjologia mięśni
    praca mięśni
    ręka
    Opis:
    The purpose of the study was to analyse the influence of the precision of a task on tension and fatigue of the trapezius and deltoid muscles. Ten young men took part in experiments. Different levels of force and different frequencies of pressing a button defined the precision of the task. Surface electromyography (EMG) was used. Muscle tension and fatigue were reflected by 2 parameters of the EMG signal: the Root Mean Square amplitude related to the maximum value and changes in the Median Power Frequency. The results showed that hand activities influence the descending part of the trapezius muscle and do not influence the deltoid muscle, and that the precision of work can influence the examined muscles of the arm and shoulder even during work in which only the hand is involved in a performed task.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2001, 7, 2; 179-193
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Interaction of Physical and Mental Work
    Autorzy:
    Singh, S.
    Aghazadeh, F.
    Ray, T. G.
    Powiązania:
    https://bibliotekanauki.pl/articles/90541.pdf
    Data publikacji:
    2002
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    physical work
    mental work
    psychophysical methods
    acceptable load limit
    fatigue
    praca a choroby
    praca mięśni
    praca umysłowa
    obciążenie pracą umysłową
    obciążenie fizyczne
    zmęczenie
    zmęczenie fizyczne
    Opis:
    The objective of the research was to determine the effect of mental load on the physical capacity of an individual. An experiment involving 9 combinations of lifting tasks, 1 lowering task, and 3 treadmill tasks was conducted. Heart rate was measured and maximum acceptable weight of lift was determined using the psychophysical method. A simple multiplication task was used as the mental load. The output variables were determined with and without the mental task. The results indicate that the individual’s physical capacity decreased with the mental task while lifting from floor to knuckle and shoulder to reach lifting heights.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2002, 8, 4; 451-463
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Three-Dimensional Lifting Model For Non-Homogeneous Loads
    Autorzy:
    Gilad, I.
    Boughanim, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/89919.pdf
    Data publikacji:
    2002
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    manual lifting
    non-symmetric lifting
    biomechanics modeling
    posture analysis
    fizjologia pracy
    pozycja przy pracy
    praca mięśni
    modele matematyczne
    podnoszenie ładunku
    Opis:
    A 3-dimensional model and analysis methodology is suggested for treating lifting tasks when unbalanced loads are involved. The paper describes the biomechanical equations that are coupled with the worker’s posture geometry, to address a practical problem of non-symmetric lifting. The analysis has a dominant biomechanical modeling scope, as it contains a breakdown of the internal lifting forces resulting from posture and external loads acting on the body. The load model represents the acting forces due to unbalanced lifting, which is commonly found in industrial situations. The suggested model allows the user to simulate the influence of the practical load distribution, aiding safe design of a lifting job.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2002, 8, 4; 511-524
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reasons for Applying Innovations for Scaffolding Work
    Autorzy:
    Jong, A. M.
    Molen, H. v. d.
    Vink, P.
    Eikhout, S.
    Koningsveld, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/90714.pdf
    Data publikacji:
    2003
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    scaffolding work
    innovations
    participatory ergonomics
    musculoskeletal problems
    construction industry
    choroby narządów ruchu
    prace budowlane
    praca na wysokości
    ergonomia
    praca mięśni
    obciążenie fizyczne
    Opis:
    In this paper reasons for applying and for not applying technical and organizational innovations in scaffolding work are studied. In a participatory ergonomic approach these innovations were developed to reduce problems concerning physical load of scaffolders. In this study reasons for the adoption of the innovations in the scaffolding sector are evaluated in 2 studies, in 48 companies. More than half of the scaffolding sector in the Netherlands adopted the innovations. Reasons for applying innovations concerned improvement of work and health and satisfaction with usage. The reason for not applying the innovations concerned specific situations, such as offshore work, in which innovations were not applicable.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2003, 9, 2; 161-175
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Isometric Pull-Push Strengths in Workspace. 1, Strength Profiles
    Autorzy:
    Das, B.
    Wang, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/90551.pdf
    Data publikacji:
    2004
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    isometric strength
    push and pull strengths
    workspace reach levels
    vertical and horizontal angles
    workstation design
    pchanie
    siła mięśni
    praca mięśni
    pozycja przy pracy
    pozycja siedząca
    pozycja stojąca
    Opis:
    The isometric pull and push strength profiles of males and females were determined in seated and standing positions in the workspace. The strongest pull strength location was at extreme reach vertically above the shoulder for both males and females. The greatest pull strength of 400 Newtons (N) for males was recorded in the seated and standing positions. Females. pull strengths in the seated and standing positions were 222 and 244 N, respectively. The strongest push strength was always at the maximum reach at the overhead location. Males. maximum push strength was 227 N in the seated position and 251 N in the standing position. Females’ maximum push strength was 96 N in the seated position and 140 N in the standing position. On the average the strength in the standing position was 79% of the seated position. The push strength was 71% of the pull strength and females were 56% as strong as males.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2004, 10, 1; 43-58
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Isometric Pull-Push Strengths in Workspace. 2, Analysis of Spatial Factors
    Autorzy:
    Das, B.
    Wang, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/90758.pdf
    Data publikacji:
    2004
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    isometric strength
    push and pull strengths
    workspace reach levels
    vertical and horizontal angles
    workstation design
    pchanie
    siła mięśni
    praca mięśni
    pozycja przy pracy
    pozycja siedząca
    pozycja stojąca
    projektowanie miejsc pracy
    Opis:
    The effect of reach levels, horizontal angles and vertical angles on isometric pull and push strengths of males and females in standing and seated positions was determined. The effect of reach levels on strength varied as a consequence of force direction, working position and gender. Reach level has a significant effect on women's pull strength in the seated position and on push strength in the standing position. The strength value was significantly greater in the extreme reach than in maximum or normal reach. Vertical angle ö had a significant effect on strength consistently in all cases. Strength values increased significantly with the increase of ö angles from 0º to 45º to 90º. The horizontal angle è had a significant influence only on the pull strength of standing and seated men and standing women (not seated woman). The maximum strength was significantly greater at è = 90º.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2004, 10, 1; 59-64
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Upper Limb Load as a Function of Repetitive Task Parameters: Part 1 - A Model of Upper Limb Load
    Autorzy:
    Roman-Liu, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/90123.pdf
    Data publikacji:
    2005
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    external load
    upper limb
    handgrip force
    cycle work
    repetitive task parameters
    praca powtarzalna
    obciążenie fizyczne
    kończyna górna
    siła mięśni
    obciążenie pracą
    Opis:
    The aim of the study was to develop a theoretical indicator of upper limb musculoskeletal load based on repetitive task parameters. As such the dimensionless parameter, Integrated Cycle Load (ICL) was accepted. It expresses upper limb load which occurs during 1 cycle. The indicator is based on a model of a repetitive task, which consists of a model of the upper limb, a model of basic types of upper limb forces and a model of parameters of a repetitive task such as length of the cycle, length of periods of the cycle and external force exerted during each of the periods of the cycle. Calculations of the ICL parameter were performed for 12 different variants of external load characterized by different values of repetitive task parameters. A comparison of ICL, which expresses external load with a physiological indicator of upper limb load, is presented in Part 2 of the paper.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2005, 11, 1; 93-102
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Upper Limb Load as a Function of Repetitive Task Parameters: Part 2 - An Experimental Study
    Autorzy:
    Roman-Liu, D.
    Tokarski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/90499.pdf
    Data publikacji:
    2005
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    electromyography
    upper limb
    handgrip force
    cycle load
    praca powtarzalna
    obciążenie fizyczne
    kończyna górna
    siła mięśni
    elektromiografia
    obciążenie pracą
    Opis:
    The aim of the study was to compare the theoretical indicator of upper limb load with the physiological indicator of musculoskeletal load, which is present while performing a repetitive task (a normalized electromyography [EMG] amplitude recorded from the muscles of the upper limb involved in the performed task). In an experimental study of a repetitive task, the EMG signal from 5 main muscles of the shoulder girdle, arm and forearm was registered: extensor carpi radialis longus, flexor carpi ulnaris, deltoideus anterior, biceps brachii caput breve and trapezius descendent. The results of the study showed a strong correlation between the theoretical indicator (Integrated Cycle Load) and the physiological indicator (root mean square of a normalized EMG amplitude from the 5 muscles). This proves that the developed theoretical indicator can be accepted as an indicator of upper limb musculoskeletal load during a work task.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2005, 11, 1; 103-112
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effective utilization of man shift through sustainable workload testing for underground mining machine operators. An ergonomic based man-machine interface approach
    Autorzy:
    Dey, Netai Chandra
    Dey, Shibaji
    Powiązania:
    https://bibliotekanauki.pl/articles/2064404.pdf
    Data publikacji:
    2019
    Wydawca:
    STE GROUP
    Tematy:
    fatigue sustainability
    FS
    muscle force
    MF
    heart rate ratio
    HR ratio
    exposure time period
    ETP
    effective utilization of man shift
    EUMS
    workload simulation
    siła mięśni
    obciążenie pracą
    okres ekspozycji
    degradacja zmęczeniowa
    tętno
    środowiskowe warunki pracy
    Opis:
    Insight of man-machine interfaces during mining machine operations, better co-ordinance with human efficiencies and suitable workload selection in underground mining machine operation are the main viewpoints of the study. Total 12 side discharge loader (SDL) and load haul dumper (LHD) operators [N = 12] have been taken as participants of the study. The methodology is divided into two parts first part is devoted to measuring and analyzing workload response of machine operation with polar heart rate monitor. Machine operator’s heart rate ratio (HR ratio) for the whole shift is recorded and metabolic rate (MR) has been analyzed. Additionally, fatigue sustainability (FS) and degradation of muscle force (MF) are recorded for each work cycles up to exposure time period (ETP) of 360 minutes. In the second part of the methodology, based on the HR ratio recorded during the mining operation, a workload simulation study is undertaken on a treadmill at the surface following BRUCE protocol. At treadmill, based on HR ratio, workload achieved from mines along with three different workloads i.e. low, moderate and high has been tested. Differences in FS and degradation rate of MF after each workload experiment have been recorded. A result from the underground operational study shows that there is about 43.2% and 32.4% of decreasing MF for SDL and LHD operators after end of spells at mines. Additionally, a negative correlation (r = -0.99) is found between ETP and MF. The workload simulation study shows that there are significant differences between FS (p < 0.05) and MF (p < 0.05) data of mining and treadmill experiment with the same workload. In comparison to an underground operation, FS rate of low, moderate and high workload is recorded 60%, 35%, and 15% higher respectively than of mine workload. Higher FS rate may achieve due to availability of good environment. Among the tested workload only low kind of workload is found suitable for mining machinery job as degradation of MF is found significantly (p < 0.05) low and FS is found significantly (p < 0.01) high in this kind of workload. Therefore, it can be concluded that in mining machinery operation better to adopt low workload for effective utilization of man shift (EUMS) as it gives comparatively low MF degradation and better FS during continuous work.
    Źródło:
    New Trends in Production Engineering; 2019, 2, 1; 394--403
    2545-2843
    Pojawia się w:
    New Trends in Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nusinersen w leczeniu rdzeniowego zaniku mięśni – praca poglądowa
    Nusinersen in the treatment of the spinal muscular atrophy
    Autorzy:
    Grędowska, Ewa
    Modrzejewska, Sandra
    Mazurkiewicz-Bełdzińska, Maria
    Powiązania:
    https://bibliotekanauki.pl/articles/1819287.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Neurologów Dziecięcych
    Tematy:
    Nusinersen
    rdzeniowy zanik mięśni
    oligo-nukleotyd antysensowny
    spinal muscular atrophy
    antisense oli-gonucleotide
    Opis:
    Nusinersen jest oligonukleotydem antysensownym wpływającym na alternatywny splicing genu SMN2, który wpływa na produkcję pełnowartościowego białka przeżycia neuronów ruchowych. W roku 2016 lek został zarejestrowany w leczeniu rdzeniowego zaniku mięśni (SMA) 5q w Stanach Zjednoczonych a w roku 2017 na obszarze Unii Europejskiej. Rdzeniowy zanik mięśni jest jedną z wiodących, genetycznych chorób będących przyczyną śmierci niemowląt. Choroba związana z dziedziczeniem autosomalnym recesywnym cechuje zapadalność na poziomie 10,3–13,5 przypadków na 100 000 żywych urodzeń. Do momentu rejestracji a później refundacji wąską grupę, 30 pacjentów leczono w Polsce, w ramach programu rozszerzonego dostępu do leku. Refundacja nusinersenu weszła w życie od 1. stycznia 2019 roku zapewniając pacjentom z SMA szeroki dostęp do leczenia, z możliwością włączenia pacjentów przedobjawowych i każdego typu SMA niezależnie od wieku i stanu funkcjonalnego. Kryteria leczenia pacjentów z SMA są ujęte w programie lekowym „Leczenie Rdzeniowego Zaniku Mięśni (B.102)”, na podstawie Obwieszczenia Ministra Zdrowia z dnia 27 grudnia 2018 r. Aktualnie w programie lekowym, na dzień 31 sierpnia 2019 jest leczonych 280 pacjentów.
    Nusinersen is an antisense oligonucleotide that affects thealternative splicing of the SMN2 gene, hence the production of the fully functional survival motor neuron protein. In 2016, the drug was registered for the treatment of spinal muscularatrophy (SMA) 5q in the United States and in 2017 in the European Union. Spinal muscular atrophy is one of the leading genetic diseases that causes infants death. The disease associated with autosomal recessive inheritance is characterized by an incidence of 10.3–13.5 cases per 100,000 live births. Until registration and reimbursement, a narrow group of 30 patients was treated in Poland within expanded access program. The reimbursement of nusinersen was granted on January 1, 2019, providing SMA patients with wide access to treatment, with the option of including pre-symptomatic patients and any type of SMA; regardless of age or functional status. Criteria for the treatment of patients with SMA are outlined in the drug program “Treatment of Spinal Muscular Atrophy (B.102)”; based on the Health Minister Declaration from December 27, 2018.Currently, 280 patients are treated in the drug program as of August 31, 2019.
    Źródło:
    Neurologia Dziecięca; 2019, 28, 56; 17-21
    1230-3690
    2451-1897
    Pojawia się w:
    Neurologia Dziecięca
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-13 z 13

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