In this paper we develop fundamental convexity properties of unfinished work and packet waiting time in a work conserving */*/1 queue. The queue input consists of an uncontrollable background process and a rate-controllable input stream. We show that any moment of unfinished work is a convex function of the controllable input rate. The convexity properties are then extended to address the probl...

This study aimed to elucidate cardiovascular loads (CVL) in construction workers during work and leisure by relative heart rate (RHR) over several days. Furthermore, we sought to evaluate the level of CVL in relation to individual factors, work ability, musculoskeletal pain and subjective general health. From a group of 255 construction workers responding to the baseline questionnaire, the CVL ...

The objective of this study was to determine whether the 4 pieces of equipment for cutting moulding, cutting reinforcement rods, carrying carpet rolls, and fitting drain pipes can lighten the work load of construction work. The results indicate that the effect of using the new ergonomically designed equipment was positive. The cutter for reinforcement rods proved to be useful, bent back posture...

Kesesuaian antara jumlah SDM dengan beban kerja, merupakan salah satu faktor psikologis yang dapat mempengaruhi produktivitas kerja. Staf Teknologi Informasi Pengembangan Rantai Pasok. Kepala Biro Sistem menyebutkan bahwa perlu Penelitian ini berforkus pada dilakukan analisis Beban kerja diterima oleh seseorang dalam melaksanakan tugas diberikan harus sesuai kemampuan dan keterbatasan. Desain p...

A relatively small decrease in intraocular pressure secondary to submaximal work can be demonstrated when factors other than the work load itself are eliminated--diurnal variation, body position, and the effect of repeated examinations. A feedback mechanism that causes a return of IOP towards its normal value after work-induced decreases is postulated.