• 노동경제논집
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• 제25권3호
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• pp.59-86
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• 2002

Using the simulated data set which is based upon the data set merging Economically Active Population Survey(EAPS) and the Supplementary Survey (SS) in 1998-2001, this paper examines the relevance of alternative programs Unemployment Insurance Savings Account (UISA) and Pension-funded Unemployment Benefit (PUB) - to unemployment insurance system in Korea. Estimating the relative size of unemployment benefit and IA balance under a specific type of UISA or PUB by simulation, this paper yields the two main results. First, replacing UI by UISA with the same benefit being maintained would be beneficial in terms of search efficiency in general, although its effectiveness is a little doubtful as for the non-regular workers. Second, the PUB is better than UISA as an alternative to UI, and also works relatively well even for the non-regular workers.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2003년도 춘계학술대회 논문집
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• pp.709-712
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• 2003

The existing technical limitation makes engineer imitate nature to solve engineering problems. Recently Micro Air Vehicle(MAV) imitating the mechanism of birds or insects is being developed. Especially Ultra Flite supported by DARPA is studying hummingbird aerodynamics to relate that information to MAV. To drive MAV bender piezoelectric(PZT) actuators are used due to the convinience of control and the small size. But the displacement of the PZT actuators are very small, and the wing driving mechanism which amplifies the stroke generated by the PZT actuators has constraints in design and manufacture because of the small dimension. In this paper a wing design concept and a efficient driving mechanism are proposed. Electroactive polymers(EAPs) are used as wing mechanism actuators. Using OpenGL the mechanisms are simulated graphically. Also a prototype actuator is being developed and verified by digital Mockup with CATIA. Basic kinematics of the mechanism is studied.

• 전기학회논문지P
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• 제67권3호
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• pp.149-154
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• 2018

We consider the system is subject to the linearly polarized oscillatory external field. We study the optical quantum transition Line shapes(QTLS) which show the absorption power and the quantum transition line widths(QTLW) of electron-piezoelectric phonon interacting system. We analyze the magnetic field dependence of the QTLS and the QTLW in various cases. In order to analysis the quantum transition, we compare the magnetic field dependence of the QTLW and the QTLS of two transition process, the intra-Landau level transition process and the inter-Landau level transition process.

• 노동경제논집
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• 제41권4호
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• pp.1-30
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• 2018

1995년 소득세제 개편으로 인해 1996년 귀속분 소득부터 적용되는 한계세율, 과세표준구간, 그리고 각종 공제제도가 조정되면서 누진도가 크게 낮아졌다. 본 연구에서는 소득세제 개편으로 인한 세후 임금률 변화가 노동공급에 미친 인과효과를 분석하기 위해 이중차분 분석을 시행하였다. 자료로는 1989~2000년 "경제활동인구조사"와 1992~97년 "대우패널데이터"를 이용하였다. 25~55세 남성 가구주 임금근로자를 대상으로 분석한 결과 세제개편의 영향을 받은 근로자의 연간 근로시간이 1.5% 정도 통계적으로 유의하게 증가한 것으로 나타났다.

• Elastomers and Composites
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• 제56권2호
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• pp.57-64
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• 2021

This paper reviews recent developments and applications of dielectric elastomers (DEs) and suggests various techniques to improve DE properties. DEs as smart materials are a variety of electro-active polymers (EAPs) that convert electrical energy into mechanical energy and cause a large deformation when a voltage is applied. The dielectric constant, modulus, and dielectric loss of DEs determine the efficiency of deformation. Among these, the dielectric constant significantly affects their performance. Therefore, various recent approaches to improve the dielectric constant are reviewed, including the enhancement of polarization, introduction of microporous structures in the matrix, and introduction of ferroelectric fillers. Furthermore, the basic principles of DEs are examined, as well as their various applications such as actuators, generators, sensors, and artificial muscles.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2002년도 춘계학술대회논문집
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• pp.495-498
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• 2002

Recently, the advent of electro-active papers (EAPap) actuators has been reported. In this paper, the possibility of the actuators is demonstrated. EAPap is a paper that produces large displacement with small force under an electrical excitation. EAPap is made with a chemically treated paper by constructing thin electrodes on both sides of the paper. When electrical voltage is applied on the electrodes the EAPap produces bending displacement. To improve the bending performance of EAPap, different paper fibers-softwood, hardwood, bacteria cellulose, cellophane, carbon mixture paper, electrolyte containing paper and Korean traditional paper, in conjunction with additive chemicals were tested. Two attempts were made to construct the electrodes: the direct use of aluminum foil and the gold sputtering technique. It was found that a cellophane paper exhibits a remarkable bending performance. When 2MV/m of excitation voltage was applied on the paper actuator, more than 3mm of tip displacement was observed out of the 30 mm long paper beam. This is quite low excitation voltage compared to that of other EAPs. The actuation principle of electro-active paper (EAPap) and possible applications are addressed.

• 동아시아경상학회지
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• 제3권2호
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• pp.13-20
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• 2015

Online or e-banking has been adopted as key banking innovation in Uganda adopted by all financial institutions in the country. This research explored the state of e-banking and its efficacy in Uganda banking industry. A correlation analysis approach was adopted for this research. In Uganda, the banking sector has been liberalized with telecommunications allowed to effect e-banking and ecommerce transactions. The study concentrated on the periods of years 2011/2012 and 2012/2013. Findings from this research revealed that BOU uses UNISS for real time gross settlement (RTGS). Since its adoption a +1 coefficient correlation was realized. With the use of mobile money, also a +1 coefficient correlation was achieved for the period under consideration. As regards the use of e-cheques, there was a drop reflected by -2.8 percent which could have been attributed to perception of the users, though there was a +1 coefficient correlation when considering e-cheque transactions and the monetary value. The use of EFT in Uganda generated a +1 coefficient correction considering the number of users and the monetary value involved. Bank of Uganda should work hard and make or go live with electronic banking supervision software which would aid them with their supervisory roles.

• 대한전기학회논문지:전기물성ㆍ응용부문C
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• 제51권9호
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• pp.455-463
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• 2002

Ionic Polymer metal composite(IPMC), one of new actuation materials of EAPs is fabricated by electroless plating of platinum on both sides of the perfluorosulfonic acid film or Nafion film and its electromechanical characteristics are investigated. The IPMC strip bends towards anode under electrical field. As the number of plating cycle increases, the distance between plated platinum electrodes on both sides of Nafion membrane decreases and also the displacement is almost inversely proportional to the number of plating. The displacement of IPMC strip depends on voltage magnitude and applied signal frequency and its maximum deformation is observed at a critical frequency, resonant frequency. Low pressure sandblasting is used for surface treatment of Nafion membrane and at 8 times of plating cycle produced actuator with high displacement performance. For more efficiency of fabricated IPMC, it is useful to add one or two surface developing step which is the second reduction process using hydrazine.

• 한국콘텐츠학회논문지
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• 제15권8호
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• pp.271-279
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• 2015

본 연구는 중소기업 기혼근로자의 직무스트레스와 이직의도의 관계에서 직장-가정갈등(WFC)의 매개효과를 검증하는 것이다. 이를 위하여 2015년 2월부터 3월까지 자기기입식설문을 웹 설문을 통해 비확률 표본추출 가운데 할당추출법으로 표집한 중소기업 기혼근로자 135명이 분석에 이용되었다. 연구결과를 살펴보면, 중소기업 기혼근로자의 직무스트레스는 직장-가정갈등(WFC)과 이직의도에 통계적으로 유의미한 영향을 주었다. 이런 직무스트레스는 이직의도에 영향을 줄 때 직접, 간접효과를 가지고 있는 것으로 나타나 직장-가정갈등(WFC)은 직무스트레스와 이직의도의 관계에 있어서 부분매개효과를 나타냈다. 이에 따라 첫째, 직무스트레스와 직장-가정갈등(WFC)으로 인한 이직의도를 줄이기 위한 방안으로서 중소기업맞춤형 심리사회지원 프로그램의 개발 및 도입이 요구되며 둘째, 기업 내 일-가정 양립을 위한 정부의 제도적 지원이 수반될 필요가 있음을 제언하였다.

• 노동경제논집
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• 제24권2호
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• pp.95-123
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• 2001

1990년대 한국 노동시장의 중요한 변화는 임시 일용직 고용비중의 현격한 증가이다. 그러나 임시 일용직 고용증가에 대한 정확한 현상 파악은 이루어지지 않고 있으며, 정책방향도 정립되지 못하고 있다. 한국노동경제학회는 비정형근로자외 실태파악과 정책방향 수립에 관한 연구를 노동부의 정책용역사업의 일환으로 수행하였으며, 본 논문은 그 일부로서 임시 일용직 근로자의 실태 파악을 위하여 고용형태에 대한 정의와 그 분류기준을 설정하고, 그에 따라 통계청에서 2000년 8월에 실시한 "경제활동인구조사 부가조사"의 결과를 분석한 것이다. 조사 결과에 의하면 종사상 지위상 임시 일용직은 고용계약상의 고용불안정 계층뿐만 아니라 각종 사회보험, 퇴직금 등의 복지혜택을 받지 못하는 계층의 근로자들을 포함하고 있다. 또한 OECD의 일시적 근로자(temporary worker) 개념을 기준으로 외국과 비교하면, 한국의 임금근로자 중 일시적 근로자의 비율은 유럽 국가들보다는 높으며, OECD국가들 중에서도 비교적 높은 편에 속한다.