• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.31 no.2
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• pp.107-111
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• 2018

In this study, we designed the temperature coefficient of resistance (TCR) and heat radiation properties of shunt fixed resistors by adjusting the atomic composition of a metal alloy resistor, and fabricated a resistor that satisfied the designed properties. Resistors with similar atomic composition of copper and nickel showed low TCR and excellent shunt fixed resistor properties such as short-time overload, rated load, humidity load, and high temperature load. Finally, we expect that improved sensor accuracy will be obtained in current-distribution-type shunt fixed resistor for IoT sensors by designing the atomic composition of the metal alloy resistor proposed in this work.

• IE interfaces
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• v.10 no.2
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• pp.115-125
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• 1997

The main purpose of this study is to establish standard times of several manufacturing processes in a small-sized manufacturing company located in Taegu. This company produces two types of products; single parts and part assemblies of bicycles. Due to lack of the standards on daily or hourly production volumes, the production manager could not assign workers daily production volume at the start of production, and could not exercise tight supervision. The standard times established in this study were much less than the average production times found in the daily production report. Based on these standard times, we calculated the number of machines that a worker can operate properly without bringing overload on him, and established a line balanced production system in each manufacturing process to minimize work-in-process inventory.

• Journal of Korean Library and Information Science Society
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• v.30 no.4
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• pp.163-181
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• 1999

The purpose of this study is to confirm what the stress factors are in performing their jobs among librarians in Public libraries. The study further investigates to figure out the difference of the degree in cognition of job stress according to demographic characteristics of individuals and the impacts of the stress factors on job satisfaction. A survey was conducted for the study sending questionaires to 113 librarians working in 14 Public libraries in Pusan. The results of the study are followings: 1) Females experience higher job stress than males. 2) The younger the age, the higher the job stress. Also, the shorter the year at work, the higher the job stress. 3) The lower the license class, the higher the job stress. Also, singles than married have higher job stress. 4) In the impacts of stress factors on job satisfaction, role conflict is the most powerful factor, and then role overload, career development, role underload, role ambiguity and interpersonal relation, each in order.

• Journal of the Korean Society of Safety
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• v.31 no.4
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• pp.22-26
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• 2016

"Always-on" small ventilators are likely to experience thermal decomposition of insulating material due to thermal, electrical, mechanical and environmental influences, and lose insulating properties by the process of oxidation and physiochemical reaction. This increases the risk of electrical fire because of layer short, short circuit, overload and Plastics are usually used to make ventilator and ventilator enclosures since they make less noise and are cheaper. Although more preferred than iron, plastic, a combustible material, has a higher risk of fire. In this study, several experiments were carried out to find out how RCD(Residual Current Protective Device) and Thermal fuses, which are electric motor protection devices, work and what needs to be done to reduce the risk of fire.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2008.11a
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• pp.290-295
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• 2008

The purpose of this study was to establish the housing welfare delivery system in Incheon. Documentary research and content analysis methods and survey were used in this study. Data drawn from internet homepage of each community center, gu-office and city hall in Incheon.. The major results of this study are as follows. 1) Related works of housing welfare are housing welfare facility management, self helf center, support service of housing life, residential environment management 2) Housing welfare delivery system consists of city, gu-office, community center order. There are many problems that the lack of experts and department of housing welfare and inconsistent works. 3) There should be optimize the related works of housing welfare in order to increase of efficiency of works and to prevent overload to public servant. 4) Housing welfare delivery system needs to co-work through collaborative network in order to realize welfare society. And each main groups have to establish their horizontal relationships.

• Proceedings of the KSME Conference
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• 2001.11a
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• pp.810-814
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• 2001

power transfer breaker is a device used to transfer the load from the electricity power line to the emergency generators. In case of overload, it also functions as a circuit breaker. In this work, a new mechanism for the device is suggested. Among the various design challenges, optimization of the trigger mechanism is identified as of central importance. Optimal design decisions are made with the use of Taguchi method.

• Korean Management Science Review
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• v.11 no.1
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• pp.91-106
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• 1994

In mixed model assembly lines, products are assembled seqeuntially that have different combination of options specified by customers. In just in time (JIT) environment, production smoothing becomes an important issue for sub-lines which supply the necessary parts to each workstation of the assembly line. Another important issue is to avoid line stopping caused by work overload in workstations. To find a sequence which minimizes the costs associated with line stoppage and the option parts inventory level, a nonlinear mixed integer programming is formulated. Recognizing the limit of the Branch and Bound technique in large sized problems, a heuristic solution procedure is proposed. The performance of the heuristic is compared with the Branch and Bound technique through randomly generated test problems. The computational results indicate that on the average the heuristic solutions deviate approximately 3.6% from the optimal solutions.

• Journal of Korea Society of Digital Industry and Information Management
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• v.18 no.4
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• pp.85-96
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• 2022

Personalized recommendation technology is one of the most important technologies in electronic commerce environment. It helps users overcome information overload by suggesting information that match user's interests. In e-commerce environment, both mobile device users and smart device users have risen dramatically. It creates new challenges. Our method suggests product information that match user's device interests beyond only user's interests. We propose a device-centered personalized recommendation method. Our method uses both purchase and share behavior for user's devices interests. Moreover, it considers data type preference for each device. This paper presents a new recommendation method and algorithm. Then, an e-commerce scenario with a computer, a smartphone and an AI-speaker are described. The scenario shows our work is better than previous researches.

• Proceedings of the Korean Nuclear Society Conference
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• 1995.10a
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• pp.147-152
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• 1995

During transients or major upsets, operators of a nuclear power plant are faced with a significant amount of information which oftentimes exceeds their capability of processing information in such a time-critical situation. To help resolve this problem of information overload, considerable work is underway worldwide to improve its man-machine interface systems (MMISs). The I&C research team of KAERI is developing a DYNamic Alarm processing System, called DYNAS, to suppress unnecessary or nuisance alarms, and at the same time, emphasize vital information. This paper describes our basic strategy to process alarms in DYNAS.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2021.05a
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• pp.30-31
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• 2021

The construction industry is an industry in which skilled construction workers should be secured and trained because of the quality and productivity of buildings, but the negative image makes it difficult to supply and demand skilled construction workers. In response, this study derived the factors influencing the intention of transferring construction workers to other occupations and investigated ways to improve the prevention of leaving other occupations by age of construction workers. The factors influencing the turnover of construction workers have also been derived, and work overload, salary, workplace stability, and employment competitiveness have a significant impact on the intention of new employees to change jobs. According to a survey on ways to improve the prevention of leaving other jobs, those in their 20s and 30s are "improving working conditions, such as providing holidays, paying overtime, compliance with working hours," and those in their 50s and 60s.