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Wyświetlanie 1-15 z 59
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:
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:
Effects of Carbon Dioxide Inhalation on Psychomotor and Mental Performance During Exercise and Recovery
Autorzy:
Vercruyssen, M.
Kamon, E.
Hancock, P. A.
Powiązania:
https://bibliotekanauki.pl/articles/91095.pdf
Data publikacji:
2007
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
carbon dioxide
behavioral toxicology
SCBA
cognition motor performance
psychomotor performance
praca umysłowa
dwutlenek węgla
wydolność
praca fizyczna
wdychanie
Opis:
On separate days, 6 highly trained participants performed psychomotor tests while breathing for 60 min 3 carbon dioxide (CO2) mixtures (room air, 3% CO2, or 4% CO2) prior to, between, and following two 15- min treadmill exercise bouts (70% VO2max). Each individual was extensively practiced (at least 4 days) before testing began, and both gas conditions and order of tasks were counterbalanced. Results showed physiological reactions and work-related psychomotor effects, but no effects of gas concentration on addition, multiplication, grammatical reasoning, or dynamic postural balance. These findings help define behavioral toxicity levels and support a re-evaluation of existing standards for the maximum allowable concentrations (also emergency and continuous exposure guidance levels) of CO2. This research explored the selection of psychometric instruments of sufficient sensitivity and reliability to detect subtle changes in performance caused by exposure to low levels of environmental stress, in this case differential levels of CO2 in the inspired air.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2007, 13, 1; 15-27
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison Between the Strain Indicator HRV of a Head-Based Virtual Retinal Display and LC-Head Mounted Displays for Augmented Reality
Autorzy:
Oehme, O.
Schmidt, L.
Luczak, H.
Powiązania:
https://bibliotekanauki.pl/articles/90667.pdf
Data publikacji:
2003
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
virtual retinal display
heart rate variability
workload
strain
augmented reality
stres
komputer
obciążenie pracą umysłową
zagrożenia zdrowia
praca przy komputerze
Opis:
Augmented Reality uses Head Mounted Displays (HMD) to overlay the real word with additional virtual information. Virtual Retinal Displays (VRD), a new display technology, no longer requires Liquid Crystal Displays (LCD). VRD technology addresses the retina directly with a single laser stream of pixels. There are no studies on the user’s informational strain in this new VRD technology. Various papers have shown that Heart Rate Variability (HRV) is a valid indicator for the user’s informational strain. An empirical test revealed no difference in the user’s HRV between VRD technology and LCD technology. Consequently, there seems to be a comparable user informational strain regarding the display types.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2003, 9, 4; 419-430
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ergonomics in Practice: Physical Workload and Heat Stress in Thailand
Autorzy:
Yoopat, P.
Toicharoen, P.
Glinsukon, T.
Vanwonterghem, K.
Louhevaara, V.
Powiązania:
https://bibliotekanauki.pl/articles/91204.pdf
Data publikacji:
2002
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
ergonomics
heat stress
physiological strain
ciepło
Tajlandia
ergonomia
obciążenie pracą umysłową
stres
praca w wysokiej temperaturze
fizjologia pracy
warunki pracy
Opis:
This study consists of assessments of the thermal environment and physiological strain in tasks associated with airport, construction, and metal jobs. The number of male and female participants was 108. Environmental heat stress was evaluated with the WBGT index. Physiological strain was evaluated by the relative cardiovascular load (%CVL) based on the measurements of heart rate. Also the increase of body temperature, weight loss, and perceived discomfort were determinated. At work sites the assessments lasted for 2 to 4 hrs for each participant. The mean physiological strain exceeded the level of 30%CVL. Severe peaks (over 60%CVL) were observed in specific tasks being in agreement with perceived discomfort ratings. The increase of body temperature and weight loss in most cases remained within acceptable limits. For the most strenuous tasks, various ergonomic improvements were developed in consultation with workers and managers.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2002, 8, 1; 83-93
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:
Occupational Medicine - Its Contribution to Protection and Promotion of Health at Work
Autorzy:
Scheuch, K.
Haufe, E.
Khan, A.
Powiązania:
https://bibliotekanauki.pl/articles/91130.pdf
Data publikacji:
2001
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
occupational medicine
health
work
future
medycyna pracy
zdrowie
praca
Opis:
This article deals with the special demands on occupational medicine due to the changes of work and of tasks at workplaces. Conclusions for research in occupational medicine are drawn from these processes. They are discussed on the basis on an analysis of literature from the years 1980–1998. Focus of future research in the field of occupational medicine is developed by taking international tendencies, the interdisciplinary setting of occupational medicine, and the close relations between science and practice into consideration.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2001, 7, 4; 527-541
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:
Effect of Subjective and Objective Workload on Asthenopia at VDU Workplaces
Autorzy:
Studeli, T.
Menozzi, M.
Powiązania:
https://bibliotekanauki.pl/articles/90214.pdf
Data publikacji:
2003
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
asthenopia
actual asthenopic complaints
actual psychological strain
workload
customer call center
stock broker
astenopia
zaburzenia widzenia
komputer
obciążenie pracą umysłową
praca przy komputerze
Opis:
An ergophthalmological tool has been developed to investigate effects of subjective and objective workload on work-related visual complaints (asthenopia). In field studies on different visual display unit (VDU) workplaces effects of objective and subjective workload, work intensity, and work breaks (5–9 min/hour) could be found. It could be shown that during the first hours of VDU work, asthenopic complaints have the tendency to follow effective workload. With increasing working time the effect of a general and visual fatigue overlaps other reported visual complaints in the majority of cases.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2003, 9, 4; 441-451
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reliability of a Questionnaire and an Ergonomic Checklist for Assessing Working Conditions and Health at Call Centres
Autorzy:
Norman, K.
Alm, H.
Tornqvist, E. W.
Toomingas, A.
Powiązania:
https://bibliotekanauki.pl/articles/90485.pdf
Data publikacji:
2006
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
test-retest reliability
inter-observer test
questionnaire
ergonomic checklist
call centre
computer work
ergonomia
warunki pracy
praca a choroby
centra telefoniczne
praca przy komputerze
kwestionariusz
Opis:
Background. The purpose was to study the test-retest reliability and internal consistency of questions in a questionnaire concerning working conditions and health and the inter-rater reliability of observations and measurements according to an ergonomic checklist. Method. Fifty-seven operators participated in a retest questionnaire and 58 operators participated in an inter-observer test. Results. The questions had fair to good or higher reliability in 142 of the total of 312. Twenty-seven of the total of 44 variables in the ergonomic checklist were classified as having fair to good or higher reliability. Conclusions. About half of the questions had fair to good or higher reliability and can be recommended for further analyses. The majority of variables in the ergonomic checklist were classified as having fair to good or higher reliability. Low reliability does not necessarily indicate that the reliability of the test, per se, is low but may signify that the conditions measured vary over time or that the answers are aggregated in one part of the scale.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2006, 12, 1; 53-68
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Incidence of Stress and Psychosocial Factors on Musculoskeletal Disorders in CAD and Data Entry
Autorzy:
Cail, F.
Aptel, M.
Powiązania:
https://bibliotekanauki.pl/articles/90018.pdf
Data publikacji:
2005
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
VDU work
MSD
stress
psychosocial factors
ergonomia
warunki pracy
praca biurowa
choroby narządów ruchu
praca i organizacja przemysłu
komputer
bazy danych
stres
zagrożenia zdrowia
układ kostny
Opis:
A comparative study concerning the incidence of psychosocial factors and stress on musculoskeletal disorders (MSD) was conducted on 30 males carrying out a computer-aided design (CAD) task and on 26 females carrying out a data entry task. Both populations completed a questionnaire concerning complaints of MSD, stress symptoms, psychosocial factors and working life. This study showed that the work context was more favourable to the data entry task operators than to the CAD task operators. In addition, there were relationships in CAD and in data entry between complaints of MSD and stress variables as well as between anguish and psychosocial factors. This field study has shown the importance of stress and of the work context in the occurrence of MSD in computer work.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2005, 11, 2; 119-130
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Observation Procedures Characterizing Occupational Physical Activities: Critical Review
Autorzy:
Denis, D.
Lortie, M.
Rossignol, M.
Powiązania:
https://bibliotekanauki.pl/articles/89974.pdf
Data publikacji:
2000
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
physical work
observation procedures
reliability
validity
observer training
obserwacja
praca fizyczna
warunki pracy
Opis:
The first objective of this paper is to compare the observation procedures proposed to characterize physical work. The second objective is to examine the following 3 methodological issues: reliability, observer training, and internal validity. Seventy-two papers were reviewed, 38 of which proposed a new or modified observation grid. The observation variables identified were broken down into 7 categories as follows: posture, exertion, load handled, work environment, use of feet, use of hands, and activities or tasks performed. The review revealed the variability of existing procedures. The examination of methodological issues showed that observation data can be reliable and can present an adequate internal validity. However, little information about the conditions necessary to achieve good reliability was available.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2000, 6, 4; 463-491
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Circadian Rhythm of Heart Rate, Urinary Cortisol Excretion, and Sleep in Civil Air Traffic Controllers
Autorzy:
Zużewicz, K.
Kwarecki, K.
Waterhouse, J.
Powiązania:
https://bibliotekanauki.pl/articles/90437.pdf
Data publikacji:
2000
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
heart rate
cortisol
sleep disorders
circadian rhythm
shift work
tętno
zaburzenia snu
praca zmianowa
Opis:
The examination of Air Traffic Controllers (ATCs) from the Warsaw Airport (Poland) included 24-hr ECG monitoring. The participants were 10 civil ATCs, 9 males and 1 woman. The study was carried out on a group of 19 ATCs during their duty periods, 14 of them working 12-hr shifts and 5 performing 24-hr duties. The participants collected urine every 4 hrs, and cortisol concentration was determined. Further, the survey included the quality and duration of sleep, and subjective fatigue in the 62 participants. In ATCs, shift work modifies natural rhythms of the circulatory system and decreases the ability for intensified mental work at night. In consequence ATCs experience frequent sleep disorders.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2000, 6, 3; 383-392
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electromagnetic Fields in Offices
Autorzy:
Sandstrom, M.
Powiązania:
https://bibliotekanauki.pl/articles/90906.pdf
Data publikacji:
2006
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
radio frequency field
office workers
exposure
pole elektromagnetyczne
pomieszczenie biurowe
praca biurowa
zagrożenia zdrowia
Opis:
With the increased use of electric and electronic equipment in our offices, our daily exposure to electromagnetic fields has become increasingly complex due to the great variety of the frequency content of the fields. Today focus has shifted from monitors as the dominating sources of electromagnetic fields to other electronic equipment, cabling, nearby substations, power lines and stray currents in buildings. In the last 5 years wireless communication has become common in our offices. These devices use radio frequency waves to communicate and are therefore sources of radio frequency fields in our offices. To a certain degree, they all add to the complicated issue of the extensive field frequencies found in offices. The exposure of office workers is generally considered to be low and not in conflict with the existing guidelines, but if a precaution approach is applied there are a number of measures that can be taken to reduce the electromagnetic fields in offices in order to obtain a good electrical environment.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2006, 12, 2; 137-147
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Health and Safety Perception of Workers in Turkey: A Survey of Construction Sites
Autorzy:
Ulubeyli, S.
Kazaz, A.
Er, B.
Powiązania:
https://bibliotekanauki.pl/articles/90956.pdf
Data publikacji:
2014
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
construction labor
worker health
occupational safety
survey
Turkey
praca
zdrowie pracownika
bezpieczeństwo pracy
Turcja
Opis:
This study reports the general health and safety (HS) conditions in the Turkish construction industry from the perspective of construction labor. Toward this aim, a questionnaire survey was carried out with 800 workers employed in 32 construction projects in Turkey. Contractors were found to neglect their legal liabilities in paying workers’ insurance premiums. Also, they overlooked safety training and were reluctant to hiring physicians at construction sites and investing in personal protective equipment (PPE). As the real constructors of projects, workers did not attach adequate importance to occupational training. In addition, they were not willing to use some PPE. Key participants of HS affairs such as workers, contractors, unions, and government should comprehend their drawbacks to overcome the current dangerous view of the industry. In this regard, related government bodies should compel contractors and workers to adapt to the relatively new regulations on occupational HS.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2014, 20, 2; 323-338
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 59

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