Two cases of occupational vitiligo were observed in a resin factory where p-tert-butylphenol (PTBP) has been used as a starting material or an intermediate of synthetic resin. In this resin factory (A shop) and another resin factory (B shop), occupational exposure to PTBP was assessed in workers charging this chemical into the reaction vessel by means of a gas-chromatographic measurement of the...

We consider the open shop, job shop, and ow shop scheduling problems with integral processing times. We give polynomial-time algorithms to determine if an instance has a schedule of length at most 3, and show that deciding if there is a schedule of length at most 4 is N P-complete. The latter result implies that, unless P = N P, there does not exist a polynomial-time approximation algorithm for...

Job shop scheduling is one of the most explored areas in the last few decades. Although it is very commonly witnessed in real-life situations, very less investigation has been carried out in scheduling operations of multi-level jobs, which undergo serial, parallel, and assembly operations in an assembly job shop. In this work, some of the dispatch rules, which have best performances in scheduli...

We describe a new solution approach for order sequencing which reflects the build-to-order strategy of the European automobile industry. Therefore, it has to cope with a daily changing variety of customer orders. Each order consists of a set of commodities which are implemented while the order sequence passes through a body shop, a paint shop, and an assembly shop. Existing solution approaches ...

BACKGROUND Assessing and predicting memory performance in everyday life is a common assignment for neuropsychologists. However, most traditional neuropsychological tasks are not conceived to capture everyday memory performance. NEW METHOD The Virtual Shop is a fully immersive task developed to assess memory in a more ecological way than traditional neuropsychological assessments. Two studies ...

This paper responds to two observations regarding current government service delivery. First, despite reasonable efforts to improve the design of forms and to establish single points of contacts in the course of one-stop-shops, citizens still perceive forms as cumbersome. Second, citizens expect governments to act more proactively by initiating relevant government services themselves instead of...