• 경영과정보연구
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• 제34권2호
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• pp.193-206
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• 2015

본 연구에서는 기업의 대리비용이 판매관리비의 비대칭적 원가행태에 어떠한 영향을 미치는지를 살펴보고, 기업 지배구조가 대리비용이 판매관리비의 하방경직적 원가행태에 미치는 영향관계에 어떠한 조절효과를 보이는지를 분석해 보았다. 2007년부터 2012년까지 국내 유가증권 시장에 상장된 1,780개 제조기업을 바탕으로 다중회귀분석을 통해 실증 분석한 결과를 요약하면 다음과 같다. 첫째, 대리인 문제가 큰 기업의 경우 그렇지 않은 기업에 비해 판매관리비의 하방경직성은 증가하는 것으로 나타났다. 이는 경영자가 매출액이 하락하더라도 자신의 특권적 소비를 줄이지 않기 때문에 판매관리비의 하방경직적 원가행태가 증가된다고 해석할 수 있다. 둘째, 대리인 문제가 심각할 것으로 예상되는 기업을 대상으로 기업 지배구조가 판매관리비의 원가행태에 영향을 미치는 지를 분석한 결과, 좋은 기업 지배구조를 가지고 있는 기업의 경우 판매관리비의 하방경직적 원가행태가 완화되는 것으로 나타났다. 이는 경영자의 대리인 문제 통제에 효과적인 지배구조를 가진 기업일수록 대리인 문제에 기인한 판매관리비의 하방경직적 원가행태가 완화되는 것으로 해석할 수 있다. 본 연구는 대리인 문제의 크기가 판매관리비의 원가행태에 어떠한 영향을 미치며, 이런 영향관계에 기업지배구조가 조절효과를 가진다는 것을 실증적으로 규명해 보았다는 데 연구의 의의를 찾을 수 있다.

• 한국통신학회:학술대회논문집
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• 한국통신학회 1986년도 추계학술발표회 논문집
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• pp.110-113
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• 1986

• 한국전문물리치료학회지
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• 제16권4호
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• pp.31-36
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• 2009

Hemiplegia-induced immobilizatoin and reduction of mechanical loading in chronic stroke limbs are common cause of disuse osteoporosis. The purpose of this study was to investigate the effects of asymmetrical weight bearing on the loss of bone mineral in the individual with chronic stroke. Sixteen hemiplegic patients with strokes were evaluated. The measurements of bone mineral density (BMD) were evaluated with the quantitative ultrasound system on the calcaneus region of the paretic and non-paretic side. Plantar pressure was measured using the Mat-Scan system. The paretic side showed significantly smaller values in the T-score of BMD, and peak value of plantar pressure, which included forefoot, midfoot, and hindfoot, than the non-paretic side (p<.05). Results from the pearson correlation analysis showed statistically significant correlation between the BMD difference and the peak-pressure difference of midfoot pressure (p<.05). This finding indicated that BMD loss depended on decrease of body weight born on the paretic leg.

• ETRI Journal
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• 제32권6호
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• pp.911-920
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• 2010

This paper presents a method of designing hybrid analog/asymmetrical square-root (SR) FIR filters. In addition to the conventional frequency domain constraints, the proposed method considers time-domain constraints as well, including the inter-symbol interference (ISI) and the opening of the eye pattern at the receiver output. This paper also reviews a systematic way to find the discrete-time equivalence of analog parts in a band-limited digital communication system. Thus, a phase equalizer can be easily realized to compensate for the nonlinear phase responses of the analog components. With the hybrid analog/SR FIR filter co-design, examples show that using the proposed method can result in a more robust ISI performance in the presence of the receiver clock jitter.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.188-190
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• 2006

This paper describes the effects of air gap eccentricity in induction machines. Asymmetric electro-magnetic force caused by the frictional worn bearing, rotor misalignment and unbalanced rotor etc. generates an asymmetrical operation, vibration and electro-magnetic noise. The need for detection of these rotor eccentricities has pushed the development of monitoring methods with increasing sensitivity and noise immunity. In this paper, we focus on investigating the asymmetrical operation considering of unbalanced magnetic force in squirrel-cage induction motor with 380 [V], 7.5 [kW], 4P, 1,768 [rpm]. The effects of the rotor eccentricity, magnetic force are investigated by finite element method (FEM).

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제51권5호
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• pp.228-233
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• 2002

A computational method for analysis of the 3 dimensional electro-magnetic induction problems has been developed. The developed method is capable of modeling the induced current and analyzing its characteristics using only scalar Potential at each node. A benchmark model of asymmetrical conductor with a hole is analyzed to verify the application of the developed method. The calculated value of magnetic flux density are compared with the measured value, and the results indicate that the developed method is valid. Also, Comparing with 3-D finite element method (FEM) results, we conformed effectiveness of the developed method for the accuracy and computation times.

• 소성∙가공
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• 제15권7호
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• pp.479-484
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• 2006

The evolution of strain states and textures during rolling with various conditions was investigated by finite element method (FEM) simulations and measurements of rolling textures. Symmetrical rolling with a high friction gives rise to a strong variation of shear strains in rolled sample leading to the formation of texture gradients throughout the thickness layers. A small variation of shear strains during rolling with a well lubrication condition leads to the formation of a fairly homogeneous rolling texture throughout the sheet thickness. During asymmetrical rolling, a proper control of rolling parameters provides the evolution of a fairly homogeneous shear texture throughout the whole sheet thickness.

• Journal of electromagnetic engineering and science
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• 제18권3호
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• pp.182-187
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• 2018

A low profile asymmetrical fractal boundary patch antenna based on reactive impedance surface (RIS) and a mushroom unit cell (MUC) is proposed and studied for dual band operation. The sides of the square patch antenna are replaced with asymmetrical half circled fractal curves for circular polarization operation at patch mode band. The fractal patch antenna is loaded with MUC for dual band operation. The antenna radiation characteristics are investigated and illustrated with both simulated and experimental results in detail. The 10-dB return loss bandwidth are 8.48% (3.21-3.49 GHz) and 2.59% (2.30-2.36 GHz) at upper and lower resonance frequencies, respectively. The 3-dB axial ratio bandwidth is 4.26% (3.21-3.35 GHz). A close agreement between simulation data with experimental results is observed.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2007년도 추계학술대회 논문집
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• pp.121-123
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• 2007

In this paper, a multiple-output converter using a coupledinductor is proposed. The Asymmetrical Half-Bridge Converter (AHBC), which is used as a master converter, obtains ZVS in the primary side switches. For the tight output voltage regulation of the slave output, the Secondary Side Post Regulator (SSPR) is adopted. The proposed magnetically coupled output filter inductor reduces the number of semi-conductor devices and magnetic components. Also, the circuit enables ZCS off switching in the SSPR MOSFET and rectifying diodes. The modes of operation which are caused by the coupled-inductor and post regulator are explained. The analyzed modes of operation of the proposed multiple-output converter are verified by the simulation and experimental results.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2007년도 추계학술대회 논문집
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• pp.124-126
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• 2007

This paper presents an asymmetrical half-bridge flyback converter with universal input voltage range. The leakage inductance and output capacitance of active switches are used to realize zero voltage switching(ZVS) operation during the transition state between two switches. In this paper, the operating principle and system analysis of the adopted converter are discussed in detail. A 5V/20A prototype has been implemented to verify the proposed topology and theoretical operation under various load condition and universal input voltage range.