Abstract With the widespread use of networked and geo-positioned mobile devices, e.g., smartphones, Spatial Crowdsourcing (SC), which refers to assignment location-based tasks moving workers, is drawing increasing attention. One critical issues in SC task that allocates appropriate workers. We propose study a novel problem, namely Coalition-based Task Assignment (CTA), where spatial (e.g., home...

author reports a case of 67- years- old men referred to donga university hospital silicosis who had worked in tunnel drilling where presumably had been exposed to high concentration free silica for almost 20 yr. this report is considered the first in korea to the best of our knowledge since no cases on silicosis could be reported in this occupation in reviewing various literature sources in kor...

rapid urban growth is resulting into increase in travel demand and private vehicle ownership in urban areas. in the present scenario the existing infrastructure has failed to match the demand that leads to traffic congestion, vehicular pollution and accidents. with traffic congestion augmentation on the road, delay of commuters has increased and reliability of road network has decreased. four s...

This paper models and analyzes serial production lines with specialists at each station and a single, cross-trained ßoating worker who can work at any station. We formulate Markov decision process models of two and three station production lines in which (1) workers do not collaborate on the same job, (2) two workers can work at the same task/workstation on different jobs at the same time. Our ...

Certain types of manufacturing processes can be modelled by assembly line balancing problems. In this work we deal with a specific assembly line balancing problem that is know as the assembly line worker assignment and balancing problem (ALWABP). This problem appears in settings where tasks must be assigned to workers, and workers to work stations. Task processing times are worker specific, and...

A major source of oppression in industrial and post-industrial society is the restrictive and highly authoritarian nature of the workplace. One response is to democratize the workplace by increasing the participation of workers in making decisions and in choosing and evaluating managers as well as sharing in the ownership of the firm. These are not new ideas, and there are many examples of orga...

a method for solving the descriptor discrete-time linear system is focused. for easily, it is converted to a standard discrete-time linear system by the definition of a derivative state feedback. then partial eigenvalue assignment is used for obtaining state feedback and solving the standard system. in partial eigenvalue assignment, just a part of the open loop spectrum of the standard linear s...

in this paper, a new approach was presented for bus network design which took the effects of three out of four stages of the bus planning process into account. the presented model consisted of three majors steps 1- network design procedure (ndp), 2- frequency determination and assignment procedure (fdap), and 3- network evaluation procedure (nep). genetic algorithm (ga) was utilized to solve th...

background :work ability assessment and its affecting factors are important in the field of occupational health. one of the factors affecting work ability is sleep disorder, which is very common among workers. therefore, the present study aimed to assess work ability and its relationship with sleep disorder in workers of a manufacturing plant.   methods : this cross- sectional study was conduct...