악성코드에 의해 파괴된 저장장치 복구 방안

김진국(Jinkook Kim) 한국정보보호학회 2016 情報保護學會誌 Vol.26 No.5

저장장치 파괴가 피해 효과를 가장 극명하게 보여줄 수 있다는 점 때문에 최근 침해사고에서 자주 사용된다. 저장장치 파괴는 공격 목적을 모두 달성한 후 마지막 수단으로 사용되기도 하지만 공격의 목적 자체인 경우도 종종 있다. 침해사고에서는 주로 저장장치 전체를 파괴하기 보다는 짧은 시간에 파괴 효과를 극대화할 수 있도록 파일시스템의 주요 데이터 구조를 파괴한다. 본 논문에서는 윈도우 운영체제 환경을 대상으로 악성코드에 의해 파괴된 저장장치 유형을 소개하고 복구 방안을 기술한다.

Synthesis and Structure of $\eta^4$-1-Functionally Substituted-2,3,4,5-Tetraphenyl-1-Silacyclopentadienyl Complexes of Irontricarbonyl. Crystal Structure of ($\eta^4$-exo-Cyclopentadienyldicarbonyliron-endo-1-Methyl-2,3,4,5-Tetraphenyl-1-Silacyclopentadi

Jinkook Kang,Jaejung Ko,Youngkun Kong,Chang Hwan Kim,Myong Euy Lee,Patrick J. Carroll Korean Chemical Society 1992 Bulletin of the Korean Chemical Society Vol.13 No.5

New silicon-monosubstituted (${\eta}^4$-2,3,4,5-tetraphenyl-1-silacyclopentadiene)transi tion metal complexes are described. The new (silole-transition metal complex)Fe$(CO)_3$ was obtained from the reaction of silole-tansition metal complex and Fe$(CO)_5$. We have determined the crystal structure of (${\eta}^4$-exo-cyclopentadienyldicarbonyliron-endo-1-meth yl-2,3,4,5-tetraphenyl-1-silacyclopentadienyl)tric arbonyliron by using graphitemonochromated Mo-$K_{\alpha}radiation. The compound was crystallized in the monoclinic space group $P2_1$/c with a = 8.925(1), b = 18.689(3), c = 19.930(3) ${\AA}$, and ${\beta}$ = 102.02$(1)^{\circ}$. The iron moiety CpFe$(CO)_2$ on silicon is in an axal position. The (silole-transition metal complex) Fe$(CO)_3$ was also prepared through the reaction of (${\eta}^4$-1-chloro-2,3,4,5-tetraphenylsilacyclopentadiene) Fe$(CO)_3$ and metal complex nucleophile. The structure configuration was studied by conventional spectroscopy.

히스테리아에 관한 임상적 고찰

金振國,金顯宇 大韓神經精神醫學會 1974 신경정신의학 Vol.13 No.4

The clinical feature, sociocultural pattern and family statas of 109 in-patients diagnosed as hysterical neurosis at Department of Psychiatry, Seoul National University Hospital in 1970, 1971 and 1973 were studied. 1) Admission rate of hysteria per total psychiatic cases were 1.45%, which revealed higher rate in contrast with the reports of Hahn a Seoul National Univ. Hosp. and that of Stephens at Henry Phipps Psychiatric Clinic. 2) Comparing with the previous Hahn's study, the classical symptoms decreased and hypochondriacal complaints increased profoundly. 3) The conflict with husband gave a precipitation to attack in 43.1% of housewives. 4) The youngest daughters with younger brothers have the highest morbid rate (44%). 5) 12.2% of the female patients had made suicide attempts. 6) All cases were received with psychotherapy and 10% of them also treated with E.S.T. Majority of the cases (81.7%) were improved. 7) In the premorbid personality, the hysterical personality was found in 44% of female patients.

LOSA를 통한 항공기 사고예방 (실행원칙 및 성공요인을 중심으로)

최진국(Jinkook Choi),김대호(Daeho Kim),최연철(Yeonchul Choi) 항공우주시스템공학회 2017 항공우주시스템공학회 학술대회 발표집 Vol.2017 No.4

The study on the comparison of the operation performance of different type of solar collectors

김휘동(Kim, Huidong),백남춘(Baek, Namchoon),이진국(Lee, Jinkook),주문창(Joo, Moonchang) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.11

The objective of this study is to make a comparative study of the operation performance of different type of solar collectors. A flat-plate collector, a single-glazed evacuated collector and a double-glazed evacuated collector are used in this study. These 3 type of collectors are connected in series in the order of a flat-plate collector, a single-glazed evacuated collector and a double-glazed evacuated collector. This experimental facility is a kind of a solar system with a controller, a heat exchanger, a storage tank and a circulation pump. Each collector has a different collection area(flat-plate collector-6.00m² total area/5.61m² aperture area, double-glazed evacuated collector-6.04m² total area/4.92m² aperture area, single-glazed evacuated collector-7.65m² total area/5.61m² aperture area) and its performance characteristic respectively. The experiments have been demonstrated at around 70?C operating temperature(flat-plate collector inlet temperature). The thermal collecting efficiencies of each collector are obtained under the different insolation and operation condition as a result.

Study on the Operation of the Solar Heating System with Ground Source Heat Pump as a Back-up Device

김휘동(Kim, Hwidong),백남춘(Baek, Namchoon),이진국(Lee, Jinkook),신우철(Shin, Uchul) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.06

The study on the operation characteristics of solar space and water heating system with ground source heat pump (GSHP) as a back-up device was carried out. This system, called solar thermal and geothermal hybrid system (ST/G), was installed at Zero Energy Solar House II (KIER ZeSH-II) in Korea Institute of Energy Research. This ST/G hybrid system was developed to supply all thermal load in a house by renewable energy. The purpose of this study is to find out that this system is optimized and operated normally for the heating load of ZeSH-II. Experiment was continued for seven months, from October to April. The analysis was conducted as followings ; - the contribution of solar thermal system. - the appropriateness of GSHP as a back-up device. - the performance of solar thermal and ground source heat pump system respectively. - the adaptation of thermal peak load - the operation characteristics of hybrid system under different weather conditions. Finally the complementary measures for the system simplification was referred for the commercialization of this hybrid system.

전기자동차용 배터리 셀 전압 측정을 위한 아날로그 Front-End 회로 설계

김규호(Kyuho Kim),윤진국(Jinkook Yun),최호열(Ho-Yul Choi),정동길(Donggil Jeong),진호정(Hojeong Jin),조경록(Kyoungrok Cho) 대한전자공학회 2020 전자공학회논문지 Vol.57 No.4

본 논문에서는 전기 자동차 배터리 성능 최적화 관리와 실시간 상태 진단을 위한 배터리 셀의 고정밀 전압 측정을 위한 아날로그 Front-End 회로를 설계하였다. 회로는 크게 고전압 멀티플레서와 레벨 시프터r, 델타-시그마 모듈레이터와 선형성을 개선한 밴드갭 기준전압 생성 회로와 ADC 기준전압 생성 회로로 구성하였다. 설계한 회로는 40V용 0.18um BCD 공정과 0.18um CMOS 공정으로 설계하여 MCP로 제작하였다. 선형성을 개선한 밴드갭 기준전압 생성 회로는 BJT의 VBE의 비선형성을 보정 가능하도록 설계하였고 측정 결과 300uV 미만의 선형성을 확보하였다. 설계 제작한 회로는 -20℃에서 60℃ 온도구간과 1.5V에서 4.3V 배터리 셀 전압 영역에서 측정하고 보정한 결과 460uV 미만의 전압 측정 정밀도를 달성하였다. This paper presents the design of an analog front-end circuits for high-precision voltage measurement of battery cells for optimization of electric vehicle battery performance and real-time condition diagnosis. The circuit consists of a high voltage multiplexer, a level shifter, a delta-sigma modulator, a bandgap reference voltage generator improving linearity, and ADC reference voltage generator. The circuit is designed by 40V 0.18um BCD process and 0.18um CMOS process and fabricated with MCP. The bandgap voltage reference circuit compensates the VBE of the BJT which improves linearity of less than 300uV. As the results, The chip shows voltage measurement accuracy less than 460uV in the temperature range of -20℃ to 60℃ and battery cell voltage range of 1.5V to 4.3V.

항공기 조종사에게 요구되는 인간행동 심리역량에 관한 연구

김소연(Soyeon Kim),최진국(Jinkook Choi) 대한인간공학회 2018 大韓人間工學會誌 Vol.37 No.3

Objective: The Purpose of this paper is to study psychological competency and human behavior required to be a safe and efficient pilot. The success of the airlines are depend upon the safety records, so to provide psychological support programs and the selection of good pilot are becoming so important. Background: The safety always comes first in aviation field since the accidents are usually associated with human casualties and property damages. The aviation industry is expanding rapidly, and the demands for the pilot are increasing. Method: It was required to interview the subject matter expert in pilot training in military, airline and general aviation fields to find out the psychological competency and human behavior required to be a safe and efficient pilot. Results: The resilience which is the core psychological competencies of pilots is the competency based on the technical proficiency and personality. The resilience is the function utilizes the knowledge and proficiency through intentional self-control under unexpected situation or environment. Conclusion: It is recommended to consider the concentration of attention distribution and resilience related with personal factor as self-efficacy, sincerity, openness and self-control on hiring and selecting pilots. Application: The aviation organizations are expected to review psychological competencies and human behavior on hiring process for a cadet program for long term management.

소기업과 소상공인 고용주 관점에서의 직원 팔로워십 척도개발 및 타당화

김혜균(Hyegyun Kim),탁진국(Jinkook Tak) 연세대학교 경영연구소 2020 연세경영연구 Vol.57 No.1

본 연구는 소기업과 소상공인 고용주의 경영성과에 직접적이고 치명적인 영향을 미치는 직원채용, 직원관리 및 직원유지에 필요한 실용적 도구를 제공하기 위해 수행되었다. 이를 위하여 10인 이하 소상공인과 50인 이하 소기업 고용주 15인을 대상으로 델파이조사법과 FGI를 수행하여 고용주의 경영에 중요한 영항을 미치는 직원의 핵심 소양을 구성하는 기본 단위로서 조직, 목표, 참여, 수행자, 수혜, 책임, 주체성, 공동성, 공유, 보상이라는 10개의 키워드를 도출하였다. 고용주들은 이 소양들이 각각 태도, 신념, 가치, 행동이라는 4개의 차원으로 직원의 직무소양으로 반영되기 원하는 것으로 조사되었고 본 연구에서는 이러한 조사 결과를 바탕으로 새로운 개념의 팔로워십을 정의하였다. 직원의 팔로워십을 측정할 수 있는 도구를 개발하기 위하여 고용주와 전문가 회의를 통하여 예비조사용 설문문항을 개발하였고 20대와 30대 남 · 녀 각각 150명씩 총 300명을 대상으로 예비조사와 본 조사를 순차적으로 실시하였다. 예비조사는 취업 준비 중이거나 이직 준비 중인 경우를 모두 포함한 성인을 대상으로 실시하였고 본 조사는 준거변인과의 타당성 검증을 위하여 50인 이하 소기업에 재직 중인 남 · 녀 직장인 300명을 대상으로 실시하였다. 확인적요인 분석을 통하여 최종적으로는 긍정적 유연성, 자기절제성, 조직본분성, 성실원칙준수성, 일에 대한 주체성 등 이상 5개 요인과 총 25개의 문항으로 구성된 팔로워십 척도 모형을 개발하였다. This study was conducted to provide practical tools for staff recruitment, employee management and staff retention, which have a direct and lethal impact on the business performance of small enterprise employers. For this purpose, Delphi survey and FGI were conducted for 50 employers of small enterprise. The ten key words of organization, goal, participation, performer, beneficiary, responsibility, subjectivity, commonality, sharing, and reward are derived as basic units constituting the core character of employees who have an important influence on the management of employers. Employers wanted to be reflected in their job skills in four dimensions: attitudes, beliefs, values, and behaviors. In this study, we defined a new concept of followership based on the results of this survey. In order to develop a tool to measure employees" follow-up, a questionnaire was prepared through an employer and an expert meeting. A preliminary survey questionnaire was developed for 150 people in their 20s and 30s for a total of 300 people. The preliminary survey was conducted for adults who are preparing for employment or preparing to leave the job. In order to verify the validity of this study with the criterion variables, the main study was conducted for 300 male and female workers in small enterprise with less than 50 employees. Finally, through the confirmatory factor analysis, a followership scale model consisting of 25 items including five items such as compliance with sincerity, self-control, work identity, organizational identity, and positive flexibility was developed. The implications, implications, limitations and necessity of followership study were discussed with the employers participating in this study.

초고층 건설공사 시공단계 리스크 요인 도출 및 분석

김수용,김성현,양진국,Kim, Sooyong,Kim, Sunghyun,Yang, Jinkook 한국건설관리학회 2016 한국건설관리학회 논문집 Vol.17 No.2

고층 건설 프로젝트는 다양한 위험 요인이 있다. 주요 위험 요인은 시간 지연과 비용의 증가 등의 부정적인 결과이다. 따라서, 본 연구는 PROMETHEE 기법을 사용하여 초고층 건설공사 시공 단계에서의 위험 요인을 분석하였다. 이를 위해, 본 연구는 전문가 표적집단면접법(FGI)을 통해 위험 인자를 확인 하였다. 그리고 PROMETHEE는 초고층 건설공사 위험 분석을 위한 설정 평가기준으로 사용 하였다. 다음으로, 평가지표 계산의 기준은 PDRI에서 정의 레벨을 사용하여 구성하였다. 선호지수 및 평가 지표는 설문을 통해 규명되었다. 이러한 과정을 통해, PROMETHEE 기법을 이용하여 본 연구는 초고층 건설공사 시공 리스크의 중요도를 산정하였다. 그 결과, 높은 수준의 위험 요인은 다음과 같이 나타났다. 이것은 '재료 리프팅 운영 계획', '아웃리거 벨트 트러스 건설', '고층 건물의 기초 작업 계획'과 '고층 건물의 구조 개념을 고려'이다. High-rise buildings construction project have various risk factors. Major risk factors are negative results such as time delay and increase of costs. Therefore, this study was analyzed risk factors in construction stages of high-rise buildings using by PROMETHEE technique. For this, this research were identified risk factors through experts Focus Group Interview(FGI). And, PROMETHEE was used to setup evaluation standard for analysis of high-rise building construction risks. Next, the standard of evaluation index calculation was composed by using the definition level in PDRI. Preference function and evaluation index were identified through questionnaires. Through these processes, this study has calculated the importance of high-rise building construction risks using by PROMETHEE technique. As a result, high degree risk factors were as following. These are 'Operation plan of material lifting', 'Outrigger & Belt Truss Construction', 'Foundation work plan of high-rise building' and 'Considering a Structure concept of high-rise building'.