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Tamer Mohamed Ahmed Khalaf

Assistant Professor

Assistant Professor

كلية الهندسة
Rm# 2A 123/2; Building #3, Department of Industrial Engineering; College of Engineering; King Saud University; PO BOX 800; Riyadh 11421; KSA
المنشورات
مقال فى مجلة
2007

Effects of three keyboard designs on wrist and forearm postures and typing task performance

T., Khalaf, . 2007

The main objective of this study was to investigate postures of both wrists and the right forearm, associated with use of three different computer keyboards. The investigated keyboards were (1) a traditional keyboard, (2) the Microsoft® natural keyboard, and (3) an experimental keyboard. Typing with the experimental keyboard appears to improve left wrist and right forearm postures by reducing left wrist extension angles and right forearm pronation angles, However, non-sagittal plane left wrist posture, as well as sagittal and non-sagittal right wrist posture did not appear to be affected. It was also noted that left wrist postures were in low or moderate injury risk zones for substantially greater percentages of the trial durations with the experimental keyboard, than with either of the other keyboards. Typing speed and accuracy were reduced with the experimental keyboard; however, it was suspected that lack of familiarity with the experimental keyboard was associated with the poorer performance.

رقم المجلد
7
رقم الانشاء
2
مجلة/صحيفة
Occupational Ergonomics
الصفحات
115-123
مزيد من المنشورات
publications

BACKGROUND: Many research studies require recruiting heat-acclimatized workers to participate in heat-stress experiments and application fields. A reliable heat acclimatization program for workers…

بواسطة Khalaf, Tamer Mohamed, Ramadan, Mohamed Zaki, Al-Ashaikh, Riyad A.
2017
publications

Objective

The purpose of this paper is to evaluate the lifting capabilities of individuals while wearing safety shoes in a hot environment and to investigate the behavior of the…

بواسطة Riyad A.Al-Ashaik, Mohamed Z.Ramadan, Khalid S.Al-Saleh, Tamer M.Khalaf
2015
publications

BACKGROUND: Human responses at work may exhibit nonlinear properties where small changes in the initial task conditions can lead to large changes in system behavior. Therefore, it is important to…

بواسطة Tamer Khalaf, Waldemar Karwowski, Nabin Sapkota
2015