• Journal of Labour Economics
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• v.26 no.3
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• pp.77-114
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• 2003

Analyses of the special data sets constructed from the National Longitudinal Survey of Youth and the Panel Study of Income Dynamics reveal that, compared with an annual wage measure, survey week wages are significantly counter-cyclically biased due to selecting workers with strong labor market attachment. We also find that survey week wages are more counter-cyclically biased in high-wage industries than in low-wage industries, that is, inter-industry gaps of survey week wages are counter-cyclically biased. Unlike existing longitudinal studies, the current study concludes that real wages are much more procyclical in high-wage industries than in low-wage industries, which is attributed to our adoption of annual wages that is less subject to the selectivity bias. Our finding is consistent with the empirical regularity that real wages are much more procyclical for men than for women, as men are overrepresented in industries with greater real wage procyclicalities. Overall, current results do not support the predictions of segmented labor market theories for the cyclicality of real wages.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.36 no.10
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• pp.1139-1146
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• 2012

An alternative approach for topology optimization of steady incompressible Navier-Stokes flow problems is presented by using P1 nonconforming finite elements. This study is the extended research of the earlier application of P1 nonconforming elements to topology optimization of Stokes problems. The advantages of the P1 nonconforming elements for topology optimization of incompressible materials based on locking-free property and linear shape functions are investigated if they are also valid in fluid equations with the inertia term. Compared with a mixed finite element formulation, the number of degrees of freedom of P1 nonconforming elements is reduced by using the discrete divergence-free property; the continuity equation of incompressible flow can be imposed by using the penalty method into the momentum equation. The effect of penalty parameters on the solution accuracy and proper bounds will be investigated. While nodes of most quadrilateral nonconforming elements are located at the midpoints of element edges and higher order shape functions are used, the present P1 nonconforming elements have P1, {1, x, y}, shape functions and vertex-wisely defined degrees of freedom. So its implentation is as simple as in the standard bilinear conforming elements. The effectiveness of the proposed formulation is verified by showing examples with various Reynolds numbers.

• Journal of the Korea Organic Resources Recycling Association
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• v.22 no.1
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• pp.49-56
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• 2014

This study was conducted to investigate the biodegradation characteristics of swine and cattle using anaerobic batch tests. The results showed that the maximum methane production rate($MPR_{max}$) and acclimation time(AT) of swine were 46.7 mL $CH_4/g$ VS.d and 17.2 d, respectively. The $MPR_{max}$ and AT of cattle were 56.5% and 24.0% lower than those of swine. The characteristics of anaerobic biodegradation varied with livestock species but $MPR_{max}$ and AT increased linearly with the content of lipid. The $MPR_{max}$ and AT of cattle with content of lipid were more sensitive than those of swine.

• Journal of Convergence for Information Technology
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• v.8 no.4
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• pp.9-14
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• 2018

The purpose of this study was to analyse the relationship between the characteristics of the patients who received oral antihyperglycemic drugs and their medical adherence in Korea. The study method was a cross-sectional study using the patient sample data of the Health Insurance Review and Assessment Service for 2016, and it was analyzed with 109 major components of diabetes drug. The medical adherence was slightly higher in male than female. The patriots & veterans(free) type had the highest medication adherence because they have low self burden to access medical institutions compared to other insurance types. It is expect that this study result will be used as a basic data to understand the burden of outpatients with health insurance and establish a policy to reduce of the self outpatients' burden with chronic diseases such as type 2 diabetes.

• Proceedings of the KAIS Fall Conference
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• 2011.05b
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• pp.572-575
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• 2011

본 연구는 프랜차이즈 본사의 성과에 직접적인 영향을 미치는 가맹점 순응에 대해 관계교환이론 관점에서 살핀 본사와의 갈등과 본사에 대한 신뢰의 영향관계를 실증 고찰한 연구이다. 연구결과는 본사에 대한 신뢰가 갈등과 순응을 완전매개 함을 보여줌으로써 가맹점 관리를 위한 프랜차이즈 본사의 신뢰 구축 필요성에 힘을 실어주고 있다. 이는 문서상 계약에 미처 명기하지 못한 공백에 대한 관계적 지배를 가능케 할 뿐만 아니라 이해의 불일치와 불공정한 힘의 관계로 인한 갈등을 관리하여 상호 호혜적 관계를 가능케 한다는 점에서 대단히 중요하다. 이와 같은 갈등관리로 인한 신뢰의 구축 그리고 가맹점 순응으로 이어지는 관계의 메커니즘을 이론적 논의와 실증분석을 통해 국내 처음으로 규명했다는 점에서 본 연구는 이론적 실무적 공헌이 크다.

• International Area Studies Review
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• v.22 no.2
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• pp.41-59
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• 2018

After global financial crisis, policy makers in major countries tried to find a new bank recovery and resolution policy. The new policy intends to normalize the market not by bail-out approach in which public funds should be provided bankrupt banks, but by market discipline approach in which unsecured creditors take part in liquidation process. Bail-in system is a new and dominant financial policy after crisis period in resolution regimes led by the government administration. This study tries to analyze the relationship between bail-in system and pro-cyclicality. Empirical analysis has been done by taking the basis of the 8 year data from 2008 to 2015, which is selected from financial statistics information system of Korea Financial Supervisory Service. Accounting and financial data are collected from the dataguide 5.0 between 2008 and 2015. Through the analysis, the effect of bail-out system and bail-in system on pro-cyclicality of total loans did not show the statistically significant relationship. However the effect of bail-out system on pro-cyclicality of SME loans showed the statistically significant relationship, meanwhile the effect of bail-in system on pro-cyclicality of SME loans did not show the statistically significant relationship. In conclusion, bail-in system can be useful policy which improves the support and promotion of SMEs.

• Communications of the Korean Mathematical Society
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• v.16 no.4
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• pp.543-566
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• 2001

이차원 선형 탄성방정식을 소개하고 약한 형식 타원성을 보여준다(P-1)순응 유한요소를 사용할 때 나타나는 잠김현상을 설명하고 그 해결책으로서 비순응 유한요소법과 penalty 항을 가진 혼합문제, 일계 최소자승법 등을 소개한다.

• Journal of Korea Fair Competition Federation
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• no.99
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• pp.2-15
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• 2003

기업결합심사는 경쟁당국의 여러 업무 가운데에서도 경쟁당국의 전문성을 가장 잘 나타낼 수 있는 분야라고 할 수 있다. 따라서 기업결합 심사결과에 대한 순응성 및 신뢰성을 높이기 위해서는 관련규정의 객관성 및 국제적 보편성 확보는 물론 기업결합심사의 전문성을 제고시킬 필요가 있다. 이를 위해 관련 제도의 계속적인 보완, 발전을 위해 노력하여야 함은 물론 기업결합 심사능력의 제고와 함께 관련조직의 확대 개편 및 전문능력을 가진 인력 확충이 필요하다. 지금과 같이 경쟁법의 역외적용 및 경제분석 위주의 입체적 심사방식이 주류인 국제적 추세에도 잘 대응하는 것이 필요하다. 이를 위해 외국 심사당국과의 미팅, 인력 및 정보교환 등을 통한 교류나 접촉도 필요할 것이다.

• Journal of the Korea Society of Computer and Information
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• v.24 no.12
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• pp.25-33
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• 2019

This paper presents a novel evolutionary framework for optimizing a bio-inspired fully dynamic neurocontroller for the maneuverable flapping flight of a simulated bird-sized ornithopter robot which takes advantage of the morphological computation and mechansensory feedback to improve flight stability. In order to cope with the difficulty of generating robust flapping flight and its maneuver, the wing of robot is modelled as a series of sub-plates joined by passive torsional springs, which implements the simplified version of feathers attached to the forearm skeleton. The neural controller is designed to have a bilaterally symmetric structure which consists of two fully connected neural network modules receiving mirrored sensory inputs from a series of flight navigation sensors as well as feather mechanosensors to let them participate in pattern generation. The synergy of wing compliance and its sensory reflexes gives a possibility that the robot can feel and exploit aerodynamic forces on its wings to potentially contribute to the agility and stability during flight. The evolved robot exhibited target-following flight maneuver using asymmetric wing movements as well as its tail, showing robustness to external aerodynamic disturbances.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• v.15 no.2
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• pp.160-167
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• 2004

Objectives : There have been very few studies on the compliance of methylphenidate-immediate releasing form(MPH-IR), which is the most frequently used drug in Korea, in Attention Deficit Hyperactivity Disorder(ADHD). This study was conducted to investigate the compliance rate and the related factors in the one year pharmacotherapy process via OPD for children with ADHD. Method : Total 100 ADHD patients were selected randomly among patients who have been treated with MPH-IR from September in 2002 to December in 2002. All the selected patients were diagnosed with DSM-IV-ADHD criteria and fulfilled the inclusion criteria. In March, 2003(at the time of 6 month treatment), all the patients and parents received the questionnaire for the compliance and satisfaction for MPH-IR treatment. In October 2003(at time of 1 year treatment), we, investigators evaluated the socio-demographic variables, developmental data, medical data, family data, comorbid disorders, treatment variables, and compliance rate. Through these very comprehensive data, The compliance rate at the time of mean 1 year treatment and the related factors were investigated. Result : 1) In the questionnaire for compliance and satisfaction for MPND treatment, the 60% of respondents(parents) reported more than moderate degree of satisfaction in the effectiveness of MPND. Their compliance rate for the morning prescription was 81%, but the rate of afternoon prescription was 43%. 2) In the evaluation at the time of 1 year treatment(October 2003), the 38% of parents were dropped out from the OPD treatment. The mean compliance rate for the 1 year treatment was 62%. the 38% of parents were dropped out from the OPD treatment. The mean compliance rate for the 1year treatment was 62%. 3) Compared with the noncompliant group(drop-out group), compliant group showed higher total, verbal and performance IQ scores. In the treatment variables, higher reposponder rate(clinician rating), higher medication dosage and more compliance rate in afternoon prescription were found in the compliant group compared with the noncompliant group. There were no statistical differences in the demographic variables(age, sex, SES, parental education level), medical data, developmental profiles and academic function. Conclusion : To our knowledge, this is the first report about the compliance rate of the MPH-IR treatment for the children with ADHD. The compliance rate at the time of mean 1year treatment was 62%, which was comparable with other studies performed in foreign countries, especially States. In this study, the compliance related factors were IQ score, clinical treatment response, dosage of MPH-IR, and early compliance for the afternoon prescription. These results suggest that clinician plan the strategies for the promotion of the early compliance for the after prescription and enhancement of overall treatment response.