• Proceedings of the KIEE Conference
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• 2005.10a
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• pp.106-108
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• 2005

3상 4선식 배전방식은 우리나라 저압 수용가에 널리 채용되고 있다. 단상과 3상을 혼합하여 사용하는 경우가 많아 전압불평형에 의한 여러 가지 문제를 발생하고 있다. 3상 4선식 배전시스템에서 3상 동력용으로 단독사용일 경우에는 별로 문제가 되지 않지만, 단상부하와 3상 부하를 혼용사용할 경우에는 부하의 불평형에 의한 어떤 문제를 발생하는지에 대해 저항성 및 유도성 부하를 대상으로 전압불평형율을 측정하고 분석하였다.

• Journal of rehabilitation welfare engineering & assistive technology
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• v.10 no.2
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• pp.113-118
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• 2016

This study was aimed to analyze the Influence of Reasonable Accommodation on the Employment Probability and Job Retention of the People with disabilities. Survey on the employment discrimination of people with disabilities was utilized. The methodologies used in the study are logistic regression estimating job probability, multiple regression to evaluate job retention. As a result, reasonable accommodation for initial exam was not statistically significant on the employment probability. While, exam process reasonable accommodation was statistically significant on the employment probability. For job retention, recruit accommodation, workplace access accommodation were not significant on the job retention. While, company regulation and job adjustment was statistically significant on the job retention. It is necessary to be provided with reasonable accommodations in the direction of increasing the employment and strengthening job retention of people with disabilities. There is a need to support and expand the reasonable accommodation to the employer by the policy.

• Journal of Labour Economics
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• v.41 no.1
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• pp.83-124
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• 2018

In this study, with the data of Human Capital Corporate Panel(HCCP) we find that the explaining power of the new hiring rate of experienced regular workers is very strong and statistically significant as a main causal factor to the decreasing trend of investment on education and training for workers in corporates, which means a sign of weakening of the internal labor market. Possibility of wage penalty from switching jobs has been weakened considerably too. The effective alternative policy measures to the weakening or laxity of the internal labor markets and whereby followed reduction in investment on education and training for workers in corporates are construction of social system outside of individual corporates to upbring field-tailored manpower of high quality for young generations and small and medium sized enterprises.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.21 no.4
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• pp.149-160
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• 2010

In 1997, Lavagnino defined four stages of technology trends in libraries; but, he left a question about the fifth stage. Based on literature review, the following; Web technology, open source application, library consortia, digitization, wireless, and social media are the main trends in the fifth stage. Analyzing the job advertisements (ads) dating from 2006 to 2010 in systems librarianship, the analysis showed that there are three patterns. The first pattern is that the title of 'system librarian' is no longer specific to managing only the ILS at many libraries. The second pattern - network management skills - is not highly required in the job ads. And the last pattern - especially academic institutions which have archive or special collection departments - was looking for a systems librarian. In addition, Web technology has evolved as the most required skill according to the advertisements, as well as inter-personal skills in a team environment.

• Journal of the Korean Professional Engineers Association
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• v.19 no.2
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• pp.10-20
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• 1986

This paper describes a countermeasure of electric utilities and customer equipment in order to minimize an effect of sensitive electrical and electronic equipment on the voltage disturbances. After being studied, some schemes to solve were discovered. Firstly, in the electric utilities, the reduction of frequency and influence of voltage drop's time are not easy to realize because of the standpoint of effect and economy. Secondly, in the customer equipment, there are some equipment to minimize the voltage disturbances, Such as an UPSs, a noise suppressors and a power conditioners. One of them should be established on the computer control and automated systems, the electromagnetic switch of delay-release type should be adopted on the electromagnetic switch, the controlling circuit should be adopted on the variable speed motors which is being considered a countermeasure for a momentary under-voltage drops, the luminaire adhering a instantaneous restrike device should be adopted on the HID lamp. And also, the scheme of extending a setting time of relay on the undervoltage relay and the forming method of sequence which is automatic reclosing at this time of instantaneous suspension of an electric supply have been studied.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.18 no.3
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• pp.291-302
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• 2005

Due to the importance of the parameter in structural response, the uncertain elastic modulus was located at the center of stochastic analysis, where the response variability caused by the uncertain system parameters is pursued. However when we analyze the so-called stochastic systems, as many parameters as possible must be included in the analysis if we want to obtain the response variability that can reach a true one, even in an approximate sense. In this paper, a formulation to determine the statistical behavior of in-plane structures due to multiple uncertain material parameters, i.e., elastic modulus and Poisson's ratio, is suggested. To this end, the polynomial expansion on the coefficients of constitutive matrix is employed. In constructing the modified auto-and cross-correlation functions, use is made of the general equation for n-th moment. For the computational purpose, the infinite series of stochastic sub-stiffness matrices is truncated preserving required accuracy. To demons4rate the validity of the proposed formulation, an exemplary example is analyzed and the results are compared with those obtained by means of classical Monte Carlo simulation, which is based on the local averaging scheme.

• Journal of Korean Society of Transportation
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• v.26 no.1
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• pp.165-180
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• 2008

The purpose of this research is to propose an effective traffic safety countermeasure to reduce both violations of road traffic acts and accident rates related to the driver's characteristics by measuring them using Q analysis method, a microscopic statistics analysis method. As a result, violators of the road traffic act could be divided into five driving characteristics and causers of traffic accident could be classified into six driving characteristics. By understanding these characteristics, We could establish a proper traffic safety countermeasure for each driving characteristic. The accomplishments of this research are as follows: The first, We could classify the decisive driving characteristics, which cause road traffic acts and traffic accidents, into internal and external causes. The relationship between each driver's characteristic and the occurrence of the road traffic act and traffic accident could be recognized more clearly. We could find the dangerous driver samples who have Accidents proneness. The second, As a result of analyzing the characteristics of these factors, We could sort out and suggest countermeasure for reducing violation of road traffic acts and traffic accidents as a priority countermeasure and complementary countermeasure. Finally, transportation companies most closely related to automobile accidents can judge new personnels on the basis of their driving characteristics before hiring, and also apply this principle to the traffic safety education vigorously.

• Journal of Convergence Society for SMB
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• v.2 no.1
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• pp.59-67
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• 2012

As industrial software domain is recognizing with one of areas producing high added values, almost software company is running around in securing skilled workers. However, the hiring of software engineers without the consideration of long-term business goals can be caused the lack of manpower again. Also if there is no strategic workforce management plan, it is impossible to gain high performance despite many software engineers have been employed. One of ways to empower the software development capability, this paper identifies the software job functions in detail and proposes how to define the competency profile for the job function. We also propose the career path management scheme using the profile. The proposed workforce management approach which is based on the competency profile, enables to keep the appropriate size of human resources, and to achieve the business performance of software organization.

• Journal of KIISE:Computer Systems and Theory
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• v.31 no.9
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• pp.487-494
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• 2004

The multiprocessor system suffers interconnection network contension while exploiting the program's parallelism. A CC-NUMA system based on point-to-point link ring structure is one of the scalable architectures that expand the system bandwidth the number of processors/nodes increases. The dual-ring system is a simple solution to enhance the system performance and scalability by duplicating the links. In ring-based systems, an unbalanced transaction among links makes a hot spot on the interconnection network. In this situation, total system performance and scalability are bound by the hot spot of the links In this paper, I propose a dual-link CC-NUMA system, which alleviates the concentration of transactions among the links. By the simulation results, the proposed system significantly outperforms the single-ring and bidirection dual-ring systems. In addition, the proposed system show better distribution of transactions among the links that achieves an extended scalability.

• The Transactions of the Korean Institute of Power Electronics
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• v.7 no.2
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• pp.121-128
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• 2002

A new high-efficient energy-recovery circuit is proposed to drive a plasma display panel (PDP) and compared with the conventional circuit. The proposed circuit uses only two inductors and no auxiliary circuit to recover the energy stored in the equivalent intrinsic capacitance of PDP. Therefore it features a simpler structure, less mass, lower cost of production, higher efficiency, and fewer power devices. The very stable and uniform light emitted from PDP proves the high quality of screen. It is suitable for wall-hanging color TVs. The proposed circuit, operating at 200kHz, is verified to be applicable on a 42-inch PDP by experimental results.