소유구조가 기업정보공개활동에 미치는 영향 : 최대주주지분율과 외국인지분율을 중심으로

김현일(Kim Hyun il),안미강(Ahn Mi Gang),고대영(Ko Dae Young) 한국국제회계학회 2011 국제회계연구 Vol.0 No.35

주주들은 자신의 부를 위하여 경영자를 효율적으로 통제하려 하거나 기업의 정보를 적극적으로 습득하기 위하여 노력한다. 이러한 주주들의 정보습득 욕구를 충족시키기 위하여 시행된 각종 공시제도를 통해 기업은 자발적으로 정보를 외부에 알리도록 되었다. 그러나 공시활동은 경영통제수단 등 여러 가지 요인에 의해 영향을 받을 수 있다. 본 연구에서는 그 중에서도 기업소유구조를 중심으로 대주주지분율과 외국인지분율이 기업정보 공개활동에 어떠한 영향을 미치는지 알아보고자 한다. 2003년부터 2006년까지 기업설명회를 개최한 299개 기업을 포함한 전체표본 2,100개를 대상으로 분석한 결과, 개최여부에 대한 로지스틱분석에서 최대주주지분율은 유의한 음(-)의 계수를, 외국인지분율은 유의한 양(+)의 계수를 가졌다. 이는 최대주주지분율은 기업설명회 개최를 억제하는 반면, 외국인지분율은 개최를 유도하는 수단 중 하나임을 의미한다. 실시기업만을 대상으로 한 회귀분석에서도 지분율 변수가 모두 예상대로 유의한 회귀계수를 가져 최대주주지분율이 낮은 기업일수록 기업설명회를 더 자주 개최하며, 외국인지분율이 높은 기업일수록 기업설명회 개최횟수가 더 많아짐을 알 수 있었다. 이러한 결과는 외국인투자자가 기업에게 정보공시를 위한 외부활동을 유도함으로써 경영자의 기회주의적 행위에 대해 견제수단이 될 수 있음을 나타낸다. 통제변수 중에서는 기업규모, 연구개발비가 개최여부와 개최횟수 모두에 유의한 양(+)의 영향을 미쳤다. 즉 기업규모가 큰 기업일수록, 그리고 연구개발활동이 많은 기업일수록 기업설명회를 더 개최하고, 더 자주 개최함을 뜻한다. 본 연구는 기업설명회 개최를 촉진시키는 요인 중 하나로 소유구조에 대해 연구함으로써 지분율 차이와 공시정보간 관련성을 입증하였다. 소유구조가 기업의 자발적 공시 활동에 유의한 영향을 미치는 것으로 나타난 본 연구의 결과는 기업의 IR관련부서와 공시제도 관계당국에 시사점을 가질 것이며 이와 관련된 연구에도 도움이 될 수 있을 것으로 보인다. This study tests on firm disclosure for outside investor is guaranteed as ownership structure. An effective ownership structure diminishes agency problems by encouraging voluntary disclosure. But it is to be regretted with little study that ownership structure is improving voluntary disclosure to present in Korea. Hence, we study how ownership structure are associated with disclosure practice which are proxy for holding Investor Relations(IR) here. And the ownership structure were measured by the largest shareholder and foreign ownership. In our tests, sample firms were obtained from firms listed in the Korean Stock Exchange from 2003 to 2006. We consider IR frequencies made by 299(2,100-total sample firms) disclosed electronic disclosure systems from KINDS. In logistic regression, we found that ownership structure influenced a likelihood of holding IR significantly. And the regression results showed that the largest shareholder influenced inversely IR frequencies. And foreign ownership have positive relations with the IR frequencies. The results of the paper are expected to contribute to the betterment of the financial disclosure system by studying Investor Relations in Korea. Also our results suggest that foreign investors are responsible for monitoring managerial performance in general and disclosure practices in particular. It helps enhance shareholder value by protecting shareholder interests against managerial opportunism.

3축 로봇 개념을 이용한 시뮬레이션 기반 모바일 위성안테나 설계

김현일(Hyun-il Kim),김성수(Sung-Soo Kim),원문철(Moon-cheol Won),허재영(Jae-young Huh) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5

A mobile satellite antenna has been virtually designed using 3-axes robot design concept. Mobile satellite antennas must have abilities to target a satellite and at the same time to stabilize the antenna dish in order to maintain its orientation toward the satellite. To achieve such design requirements, three axes robot design concept has been employed. A 3-D CAD model has been creel ted to virtually realize the design concept. In order to insure the created CAD model. kinematic analyses have been carried out for collision detection of the parts. Inverse dynamic analyses have been also carried out to compute required torques for motor selection using multibody dynamic analysis program ADAMS. Since mobile satellite antennas experience base motions, a relevant control system should control the three antenna axis to maintain the dish orientation to point the satellites accurately. A PIDA control algorithm are designed and Implemented into the virtual multi body model to control the yaw. level (roll). and cross-level (pitch) angle of a mobile satellite antenna. ADAMS and Matlab co-simulation scheme is employed in order to examine whether proposed PIDA control algorithm provides effective characteristics comparing with PID control.

전기화학적 산화처리가 탄소섬유/극성화된 폴리프로필렌 복합재의 기계적 계면 특성에 미치는 영향

김현일 ( Hyun Il Kim ),최웅기 ( Woong Ki Choi ),오상엽 ( Sang Yub Oh ),안계혁 ( Kay Hyeok An ),김병주 ( Byung Joo Kim ) 한국공업화학회 2013 공업화학 Vol.24 No.5

In this work, the effects of electrochemical oxidation of carbon fiber surfaces on mechanical interfacial properties of carbon fibers-reinforced polarized-polypropylene matrix composites were studied with various current densities during the treatments. Surface properties of the fibers before and after treatments were observed by SEM, AFM, XPS, and contact angle measurements. Mechanical interfacial properties of the composites were measured in terms of critical stress intensity factor (KIC). From the results it was found that O1s peaks of the fiber surfaces were strengthened after electrochemical oxidation which led to the enhancement of surface free energy of the fiber, resulting in good mechanical performance of the composites. It can be concluded that electrochemical oxidation of the carbon fiber surfaces can control the interfacial adhesion between the carbon fibers and polarized-polypropylene in this composites system.

동시성 전이가 있는 위암 환자에서의 예후 인자

김현일(Hyun Il Kim),하태경(Tae Kyung Ha),권성준(Sung Joon Kwon) 대한외과학회 2011 Annals of Surgical Treatment and Research(ASRT) Vol.80 No.1

Purpose: The prognosis for gastric cancer patients with distant metastasis is very poor. The purpose of this study was to evaluate the prognosis and survival for gastric cancer patients with synchronous metastasis. Methods: Among 2,083 gastric cancer patients who received surgery at the Department of Surgery, Hanyang University Hospital from 1992 to 2009, 164 patients revealed distant metastasis. However, 3 patients who died of postoperative complications were excluded. For the remaining patients, various clinicopathological factors were analyzed using univariate and multivariate survival analyses. Results: Systemic chemotherapy (SC), type of surgery, lymph node dissection, degree of peritoneal carcinomatosis (PC), presence of ascites and tumor location were significant prognostic factors. However, sex, age, number of metastatic sites and histologic classification were not significant prognostic factors. In multivariate analysis, the type of surgery, the SC and the degree of PC were independent prognostic factors. Survival benefit by SC was significant in single site metastasis. The significant survival difference between resection and non-resection groups was observed regardless of number of metastatic sites. Conclusion: In gastric cancer patients with metastasis, the favorable prognostic factors were type of surgery and SC in single metastasis. The gastrectomy improves the prognosis regardless of number of metastatic sites. However, a prospective randomized clinical trial is mandatory to attain more accurate information.

마이크로 버블 발생을 위한 노즐의 수치적 연구

김현일(Kim Hyun-il),황재순(Hwang Jaesoon),이상민(Lee Sang Min),신명선(Shin Myung Sun),이종호(Lee Jong Ho) (사)한국CDE학회 2012 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2012 No.2

Recently, with the growth of living standards and income, the interest to the environment pollution is increased. According to the reinforcement of a water pollution regulation, a study for an efficiency improvement of sewage disposal carried out. There are many ways to efficiency improvement of sewage disposal. One of them way is to increase the dissolved oxygen content of water in water treatment tank. In this paper, we suggest a nozzle which can generate micro bubbles and increase the dissolved oxygen content of water. The micro bubbles through the flow of spiral and crash is generated in nozzle. This results of analysis show bad result that is large size of bubble by flow of crash because of limited velocity to inlet condition. The bubble size of 20~50 ㎛ has captured about 78% of the air to the nozzle using the flow of spiral in control volume. We can most likely increase efficiency improvement of sewage disposal by this study.

태양광발전 도시 프로젝트의 개발현황과 발전방향 고찰

김현일(Kim Hyun-Il),서승직(Suh Seung-Jik),박경은(Park Kyung-Eun),강기환(Kang Gi-Hwan),유권종(Yu Gwon-Jong) 한국태양에너지학회 2008 한국태양에너지학회 논문집 Vol.28 No.6

Buildings are responsible for approximately 50% of current carbon dioxide emissions. Energy planning at a town and city scale needs a strategic approach, supported by strong planning policies. The purpose of this study was to investigate the urban scale grid-connected photovoltaic(PV) system for urban residential and commercial sector applications. The integration of PV technology into roof of houses is an approach that is being championed in Germany, Japan and United states etc. In the Korea, PV roofing systems already are given the large number of houses which are projected to be built by 2012. However unlike germany and Japan, urban scale grid-connected PV system is not yet installed. The solar city which is installed building-integrated photovoltaic system is available to use of renewable energy sources such as solar to meet demand, instead of fossil fuels, with the goal of realizing an ecologically oriented energy supply.

2018 Korean Society of Hypertension guidelines for the management of hypertension: part I-epidemiology of hypertension

김현창,Sang-Hyun Ihm,김근호,Ju Han Kim,Kwang-Il Kim,Hae-Young Lee,이장훈,Jong-Moo Park,박성하,편욱범,신진호,채성철 대한고혈압학회 2019 Clinical Hypertension Vol.25 No.4

The Korean Society of Hypertension guideline defines hypertension as systolic blood pressure ≥ 140 mmHg or diastolic blood pressure ≥ 90 mmHg, where the effectiveness of pharmacological treatment has been established. It is confirmed that higher blood pressure levels are associated with increased risk of cardiovascular disease and mortality also in the Korean population. About one third of Korean adults aged 30 years or older are estimated to have hypertension, and the prevalence of hypertension gradually increases as the age increases. The awareness, treatment, and control rates of hypertension are generally improving in Korea, but more efforts are required to increase awareness and treatment among younger patients with hypertension and to improve lifestyle modification compliance at all ages. More studies are required to determine the magnitude and impact of white coat hypertension and masked hypertension in the Korean population.

관측 강우와 심층신경망의 적용을 통한 도시홍수 분석

김현일(Kim, Hyun Il),이재영(Lee, Jae Young),한건연(Han, Kun Yeun),조재웅(Cho, Jae Woong) 한국방재학회 2020 한국방재학회논문집 Vol.20 No.1

도시유역의 홍수 발생은 주로 저지대의 유수 집중과 배수관거의 만관에 의해 발생하는데, 이는 높은 강우강도와 집중적인양상을 가지는 강우 사상과 함께 나타난다. 도시유역에 대한 유출량 사전 분석을 위해서는 SWMM이 이용될 수 있지만, 대상 유역이 넓고 배수시스템이 복잡한 경우 1차원 도시유출해석에 적지않은 시간이 발생할 수 있다. 또한, 특정 도시 유역에대하여 많지 않은 침수 사례와 침수 유발 관측강우의 부족은 홍수 대비에 대한 기초자료를 제공하는데 어려움이 있다. 홍수를일으킬 위험 강우 발생 시 긴급하게 도시 유출량을 예측하기 위해서, 본 연구에서는 6시간 지속시간을 가지는 전국단위관측 강우사상을 반영하여 심층신경망 모형을 구축하였다. 하나의 강우사상에서 10개의 통계적 특성을 입력 자료로서 고려하였으며, 예측하고자 하는 목표값은 SWMM을 통한 10분 단위 총 누가 월류량으로 하였다. SWMM모의 결과의 적절성을 검증하기위해 2차원 수리해석 모형과 침수흔적도를 연계한 검증을 실시하였다. 대상지역에 대한 SWMM의 모의 시간은 14분이 소요되었으며, 본 연구에서 제시된 심층신경망과 관측 강우 자료 기반 모형은 2~3초 내외에서 수행되었다. 예측은 강남(400) AWS에서2011년 7월 27일에 관측된 강우사상에 대한 총 누가 월류량을 대상으로 하여 모형의 실용성을 검증하였다. Urban flooding primarily occurs due to flash floods in low-lying regions or insufficient capacity of drainage systems. Urban inundation has become more dangerous to residents because of an increase in impermeable areas, uncertainties in urban sewage planning, and the accumulation of sedimentation in drainage pipes. As an urban watershed with a drainage system and an urbanized river is complicated, a specific time interval is required for the preparation and processing of urban runoff analysis. To allow for rapid simulations of urban runoff estimation during heavy rainfall, a deep neural network model that imitates the conditions of a 6-h duration rainfall was developed in this study. Ten different statistical aspects for each rainfall event were considered as input data, and the total accumulated overflow from a manhole was calculated at intervals of 10 min using storm water management model (SWMM). To verify the accuracy of the results from SWMM, the results obtained from a two-dimensional hydraulic model and an inundation trace map were compared. The computational times for the deep neural network and rainfall data-based models proposed in this study were estimated to be within 1 s, whereas the simulation using SWMM required 14 min. The proposed deep learning model was tested using the total accumulated overflow for the rainfall event observed at Gangnam (400) automatic weather station on July 27, 2011. The simulated results agreed with the observed results in terms of the total accumulated discharge.

반응표면분석법을 통한 Arthrobacter sp.의 amylase 생산 최적화

김현도 ( Hyun Do Kim ),임영금 ( Young Kum Im ),최종일 ( Jong Il Choi ),한세종 ( Se Jong Han ) 한국화학공학회 2016 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.54 No.1

본 연구에서는 극지 연구소로부터 분양 받은 Arthrobacter sp. PAMC 27388 균주에서 생산되는 아밀라아제(amylase)를 물리적 요인(physical factor)들의 변화를 통하여 생산배지 최적화를 수행하였다. 한천 배지 상에서 lugol solution을 이용한 클린환의 확인을 통하여 아밀라아제가 생산됨을 확인하였으며, 16S rDNA를 이용하여 동정한 결과 Arthrobacter sp. 임을 확인할 수 있었다. 최적화 이전의 아밀라아제 생산량은 1.66 mU/L로 확인되었다. 최적화 결과, 2.49 mL의 접종부피, pH 6.85, 42.87 mL의 배지 부피의 조건에서 가장 많은 양의 아밀라아제가 생산될 것으로 예상되었으며, 생산량은 2.84 mU/L로 예상되었다. 확인 실험을 통하여 최적화 이전과 비교하여 생산량이 약 150% 증가한 2.50 mU/L의 아밀라아제가 생산됨을 확인할 수 있었다. In this study, the physical factors for amylase production by Arthrobacter sp. were optimized using response surface methodology(RSM). Antarctic microorganism Arthrobacter sp. PAMC 27388 was obtained from the Polar and Alpine Microbial Collection(PAMC) at the Korea Polar Research Institute. This microorganism was confirmed for the excretion of amylase with Lugol`s solution. The amylase activity was after flask culture was as low as 1.66 mU/L before optimization. The physical factors including the inoculum volume, the initial culture pH, and the medium volume were chosen to be optimized for the enhanced amylase production. The calculated results using RSM indicate that the optimal physical factors were 2.49 mL inoculum volume, 6.85 pH and 42.87 mL medium volume with a predicted amylase production of 2.84 mU/L. The experimentally obtained amylase activity was 2.50 mU/L, which was a 150% increase compared to the level before optimization.

팬터그래프 방식의 전기버스 충전시스템을 위한 충전 인터페이스 및 통신 규약

김현일(Hyun-Il Kim),조현창(Hyun-Chang Cho),오국환(Koog-Hwan Oh) 한국자동차공학회 2022 한국자동차공학회 학술대회 및 전시회 Vol.2022 No.11

Due to the commercialization of electric buses in South Korea, charging methods for electric buses have been studied and implemented. Currently, plug-in charging methods are mainly dominated in South Korea. However, there are various 전기자동차 charging sockets for them and they are inconvenient due to the manual charging method. Recently, in North America and Europe, an automatic charging method, pantograph-type electric bus charging system, is being commercialized. It has the advantage that electric buses can automatically charge fast even when parking or stopping. This paper introduces charging interfaces and communication protocols of the pantograph charging system for electric buses.