scholarly journals An exploratory study on the impact of static and dynamic sitting postures on lumbar and pelvic mobility during visual display terminal work

2021 ◽  
Vol 33 (5) ◽  
pp. 406-412
Author(s):  
Hironori Tanoue ◽  
Toshitaka Mitsuhashi ◽  
Shunji Sako ◽  
Ryoichi Inaba
2019 ◽  
Vol 29 (7) ◽  
pp. 942-955 ◽  
Author(s):  
F Leccese ◽  
G Salvadori ◽  
M Öner ◽  
T Kazanasmaz

The authors examined the effect of external shading system on cognitive performance, alertness and visual comfort of visual display terminal (VDT) users under two realistic office lighting settings in this study. Daylight was the source of illumination being considered as the most significant and preferred one. A total of 26 participants performed visual and cognitive demanding tasks as well as providing subjective alertness, performance and visual evaluations in a full-scale mock-up VDT workstation. Two trials (with and without shading system) were executed during one experimental session. Results revealed that the use of a shading system improves the performance of a user on colour-naming task requiring sustained attention, while no differential effects were observed on tasks involving other cognitive skills such as search velocity and vigilance. Within-subject performance differences were more pronounced during morning hours. Higher performance was reported in some cognitive tests when the subjective sensation of visual discomfort was lower.


2019 ◽  
Vol 41 (2) ◽  
pp. 167-182 ◽  
Author(s):  
M Öner ◽  
T Kazanasmaz ◽  
F Leccese ◽  
G Salvadori

This study explored the impact of daylight illuminance on cognitive load during visual display terminal use by means of various physiological, performance and subjective measures. Repeated-measures design was adopted to identify the impact of variations in daylight levels that were manipulated through the shading system configurations (shading-on; shading-off). A total of 30 subjects performed visual and cognitive demanding tests. Performance measures were supported by subjective data and eye-related measures during the experimental analysis. Results revealed that the use of a shading system had positive impact on sustained attention. Concerning ocular measures, percentage of eye closure values showed opposite tendencies among vigilance and sustained attention demanding tests. Eye aspect ratio-max and blink duration were significantly correlated with reported glare sensation. In all tests, eye aspect ratio-max was found significantly higher in lower illuminances. Search velocity was significantly correlated with ocular variables in higher illuminances whereas sustained attention showed an opposite trend. This, initially, explains that even slight differences in daylight illuminance might have distinctive effects on the relationship between different groups of assessment variables while measuring cognitive load. Secondly, it proves the significance of carrying out sensitive experiments in terms of both light levels and test characteristics. Practical application: The findings of this study could suggest that a practical application, the use of a shading device, might deliver an efficient solution on such a multifaceted question about the potential effects of luminous environment on the evaluation of cognitive load. Work environments might be considered as cognitively efficient if only the harmony of less mental effort, more satisfaction and less health problems exist, which together ultimately deliver higher work performance. In real-world work environments, application of such shading devices involves advantages not only for avoiding excessive daylight exposure or optimizing energy consumption, but also facilitating cognitive, affective and physiological processes of individuals.


2011 ◽  
Vol 152 (6) ◽  
pp. 933-940.e2 ◽  
Author(s):  
Takashi Kojima ◽  
Osama M.A. Ibrahim ◽  
Tais Wakamatsu ◽  
Atsushi Tsuyama ◽  
Junko Ogawa ◽  
...  

2016 ◽  
Vol 49 (8) ◽  
pp. 1034-1051 ◽  
Author(s):  
Y Wang ◽  
X Zhong ◽  
Y Zhang ◽  
Y Tu ◽  
L Wang ◽  
...  

Although visual display terminals have been used in office work for many years, research on the effect of long time work using them is still insufficient. Also, the impact of a LED light source for all day work is not clear. In this paper, the visual fatigue caused by long-term VDT work under fluorescent and LED luminaires was investigated though subjective reports of symptoms, ophthalmological parameters and physiological signals. The results show that visual fatigue becomes more serious with increasing time spent at VDT work. Compared to fluorescent luminaires, the LED luminaires produced significantly greater near point accommodation, blink amplitude and oxygen saturation but less dry eye symptoms, less best corrected distance visual acuity and less high-frequency electrocardiogram power as time passed, although all were of small effect size. Although the participants carried out eight hours of VDT work under the two light sources, at the end the symptom ‘tired eyes’ was rated as moderate while all the other reported symptoms were rated as slight.


2000 ◽  
Vol 28 (2) ◽  
pp. 109-118 ◽  
Author(s):  
Hessel J. Zondag

Expectancy theory has been utilized by organizational psychology to explore the expectations and valuations of individuals in various professions. This study employs expectancy theory to clergy, investigating pastors' personal motivations, or values, for assuming pastoral ministry and the subsequent expectation that these values will be honored by their activities within the pastorate. The responses of 235 pastors from Catholic and Protestant denominations on a 24-item questionnaire devised to gauge pastoral motivation and adapted to assess pastoral expectations were factor analyzed and correlated in this exploratory study. The analysis yielded four robust factors. The first two motives found to be dominant were the pursuit of a Christian Way of Life and Anthropocentric Altruism. Anthropocentric Egoism and Theocentric Egoism, although secondary motivations, were theoretically meaningful in the understanding of pastoral motivations and expectations. The impact of expectations upon pastoral well-being and resilience against burnout is discussed.


2021 ◽  
pp. 106648072110098
Author(s):  
Carla Sílvia Fernandes ◽  
Bruno Magalhães ◽  
Sílvia Silva ◽  
Beatriz Edra

The COVID-19 pandemic represents a global threat and crisis situation, and its wide-reaching impact has also affected marital satisfaction. Dysfunction of the marital system puts the survival of the family unit at risk. This research aimed to determine the level of marital satisfaction of Portuguese families during the social lockdown and the association between the variables under study. A descriptive, exploratory study was conducted. During the social lockdown, 276 people of Portuguese nationality and residing in Portugal were recruited using nonprobabilistic convenience sampling. Marital satisfaction in the pandemic phase showed low values that may be associated with the social, economic, and political context experienced by the pandemic situation. Future research must be carried out in order to identify, prevent, and intervene in situations of violence. In addition, future research should explore not only marital satisfaction during the current pandemic but a more systemic assessment of marital relations during crises, expanding the impact of marital satisfaction in family functioning.


Author(s):  
Khalid Alkharabsheh ◽  
Yania Crespo ◽  
Manuel Fernández-Delgado ◽  
José R. Viqueira ◽  
José A. Taboada

2007 ◽  
Vol 2 (1) ◽  
pp. 76-85
Author(s):  
Booi Hon Kam ◽  
Hernan Riquelme

The advent of Internet has provided banks an opportunity to reduce costs, increase customer base, and mass customize by delivering their products and services through this medium. A flurry of studies on Internet banking (IB) has since emerged. The majority of these studies, however, have been directed to either IB adoption or IB service quality delivery. With few exceptions, the impact that customer satisfaction with e-banking service qualities has on IB usage remains unexplored. This study examines a sample of Australian IB users based on their frequency and length of usage. The results show that as customers become more acclimatized to IB, they use these services more often. Further, daily and frequent IB users are more pleased with “ease of use” and “aesthetics” and tend to use IB more for electronic fund transfer and foreign exchange transactions than the less frequent users. The findings suggest that banks need to develop more customized services since there are distinct market segments with different banking requirements.


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