조직구성원의 정보보안 준수 및 미준수 원인에 대한 연구

황인호,허성호,Hwang, In-Ho,Hu, Sung-Ho 한국융합학회 2020 한국융합학회논문지 Vol.11 No.9

본 연구의 목적은 정보보안 준수의도에 영향을 주는 긍정적, 부정적 측면의 환경적 요인을 제시하고, 개인의 보안 준수의도와의 영향관계를 찾는 것이다. 연구대상은 정보보안 정책 및 기술을 적용하는 조직의 구성원들이며, 설문 조사를 통하여 유효표본을 확보하였다. 분석과정에서 구조방정식모델링을 통해 연구모델에 대한 검증을 하였다. 측정변수는 정보보안 정책, 정보보안 시스템, 정보보안 기술적 지원, 업무장애, 비가시성, 조직몰입, 준수의도로 구성하여 분석에 활용하였다. 결과는 보안 준수요인인 정책, 시스템, 기술적 지원과 미준수 요인인 업무 장애가 각각 조직몰입에 영향을 주었으며, 준수의도로 이어지는 것을 확인하였다. 연구 모델의 검증 결과를 토대로 조직의 정보보안 준수 수준 향상을 위한 구성원들의 보안 준수 전략 수립의 방향성을 제시하였다. The purpose of this study is to present the environmental factors of positive and negative aspects that affect the information security compliance intention, and reveals the relationship of the individual's the security compliance intention. The subjects of this study are employees of organizations that apply information security policies and technologies, and effective samples were obtained through surveys. In the process of analysis, the study model was verified through structural equation modeling. The measurement variables consisted of security policy, security system, technical support, work impediment, security non-visibility, compliance intention and organizational commitment and used for analysis. The results confirmed that security compliance factors such as policy, system, technical support, and non-compliance factors, work impediment, respectively, had an impact on organizational commitment, leading to compliance intention. The verification result of the research model suggests the direction of establishing a security compliance strategy for employees to improve the level of information security compliance of the organization.

무극 함금석영맥광상 화강암질모암에서의 원소들의 분산형태와 분산범위

황인호,전효택,Hwang, In Ho,Chon, Hyo Taek 대한자원환경지질학회 1994 자원환경지질 Vol.27 No.5

Geochemical studies on gold-bearing quartz veins and granitic wallrocks from the Mugeug mine were carried out in order to investigate primary dispersion patterns of elements and to quantify primary dispersion widths of elements with distance from the gold-bearing quartz veins. The best fitting model of dispersion pattern in altered wallrock around the gold-bearing quartz veins is an exponential function for Au, As, Sb, $Na_2O$ and Sr, and a quadratic function for CaO, $K_2O$, MnO, Ba, Rb and Cs. The primary dispersion widths are 15~343 cm in the hanging wall, and 33~173 cm in the footwall. The width of primary dispersion in the hanging wall is twice as thick as that in the footwall mainly due to the thermal effect and volatile components. The primary dispersion width is increased as the increase of gold-bearing quartz vein width and contents of As and Sb in gold-bearing quartz veins, but is not related to Au content in gold-bearing quartz veins.

교량검사 굴절로봇 작업붐의 진동제어

황인호,이후석,이종세,Hwang, In-Ho,Lee, Hu-Seok,Lee, Jong-Seh 한국전산구조공학회 2008 한국전산구조공학회논문집 Vol.21 No.5

BIRDI(Bridge Inspection Robot Development Inter)ace)에서 현재 개발된 첨단굴절로봇차는 기존의 굴절차에 비해 소형이며, 12m에 이르는 작업붐으로 인해 교량의 진동, 풍하중 등에 의해 쉽게 진동이 발생할 것으로 예상된다. 본 연구에서는 첨단굴절로봇차의 머신비전 시스템을 통한 점검 성능 확보를 위해 작업붐에 엑츄에이터를 장착하여 유해 진동을 제어할 수 있는 시스템을 제안하였으며, 성능 평가를 위해 수치적, 실험적 연구를 수행하였다. 제안된 제어시스템의 수치적 연구를 위해 현재 제작된 작업붐의 제원을 이용하여 모델링하였고, 적당한 주파수 특성을 가진 하중을 가정하였으며, 최적 제어이론인 LQ 조정기를 설계하였다. 수치해석 결과, 제안된 제어시스템은 작업붐에 발생되는 유해 진동을 저감시킬 수 있었다. 실험적 연구를 위해 작업붐의 축소 모형을 제작하였고 제어시스템을 구축하였다. 또한 실험결과 작업붐의 진동을 짧은 시간에 제어하는 우수한 성능을 보였다. 본 연구를 통해 제안된 시스템의 진동제어 성능을 입증하였으며, 실제 첨단굴절로봇차에 적용될 경우 점검 시스템의 성능을 향상시킬 수 있을 것으로 사료된다. A robot crane truck is developed by the Bridge Inspection Robot Development Interface(BRIDI) for an automated and/or teleoperated bridge inspection. This crane truck looks similar to the conventional bucket crane, but is much smaller in size and light-weight. At the end of the telescoping boom which is 12m long, a robot platform is mounted which allows the operator to scan the bridge structure under the deck trough the camera. Boom vibration induced by wind and deck movement can cause serious problems in this scanning system. This paper presents a control system to mitigate such vibration of the robot boom. In the proposed control system, an actuator is installed at the end of the working boom. This control system is studied using a mathematical model analysis with LQ control algorithm and a scaled model test in the laboratory. The study indicates that the proposed system is efficient for the vibration control of the robot booms, thereby demonstrating its immediate applicability in the field.

태양광 발전기술과 개발 동향

황인호,Hwang, In-Ho 한국전기산업진흥회 1998 電氣産業 Vol.9 No.1

Dead-Time 적응제어 기능을 갖는 PWM CMOS DC-DC 부스트 변환기

황인호,윤은정,박종태,유종근,Hwang, In-Ho,Yoon, Eun-Jung,Park, Jong-Tae,Yu, Chong-Gun 한국전기전자학회 2012 전기전자학회논문지 Vol.16 No.3

기존의 DC-DC 부스트 변환기에 사용되는 non-overlapping gate driver는 dead-time이 고정되어 있기 때문에 body-diode conduction loss 또는 charge-sharing loss가 발생하는 문제점을 가지고 있다. 이러한 loss에 의한 효율 감소를 줄이기 위해 본 논문에서는 dead-time 적응제어 기능을 갖는 PWM DC-DC 부스트 변환기를 설계하였다. 제안된 DC-DC 부스트 변환기는 CMOS $0.35{\mu}m$ 공정으로 설계되었고, 입력전압 2.5V를 받아서 3.3V의 출력전압으로 승압시킨다. 스위칭 주파수는 500kHz이며, 최대효율은 97.3%이다. Since the non-overlapping gate driver used in conventional DC-DC boost converters generates fixed dead-times, the converters suffer from the body-diode conduction loss or the charge-sharing loss. To reduce the efficiency degradation due to these losses, this paper presents a PWM DC-DC boost converter with adaptive dead-time control. The proposed DC-DC boost converter delivering 3.3V output from a 2.5V input is designed with CMOS $0.3{\mu}m$ technology. It operates at 500kHz and has a maximum power efficiency of 97.3%.

소비자 만족도에 영향을 미치는 한우고기의 관능 특성

황인호,Hwang In-Ho 한국축산식품학회 2004 한국축산식품학회지 Vol.24 No.3

Eating quality is a reflection of consumer satisfaction, while beef quality grade describes carcass characteristics of chiller assessment which are largely influenced by production systems including breeding and feeding schemes. On the other hand, it should be emphasized that high palatability of beef is a function of production and processing components including breed, nutrition, animal handling, post-slaughter intervention and cookery. Numerous efforts have been made by Korean beef industry and research institutes to deliver high quality beef with which domestic beef consumers are satisfied. However, majority of studies have tended to focus on improvement of intramuscular fat content with little attention on its effect on consumer-based eating quality. Furthermore, there is very limited accessible information(if any) on relative importance of eating characteristics (eg, tenderness, juiciness and flavor intensity) to consumer satisfactory rate and palatability grade. On this regard, our recent results indicated, for example, that when m. longissimus was prepared by a thin-slice style BBQ, relative weightings of tenderness, juiciness and flavor intensity for consumer satisfactory rate were 0.4, 0.35 and 0.25, respectively. When eating quality was graded into 4 groups by a sum of tenderness, juiciness and flavor intensity after multiplying these coefficients, consumers responded that the palatability score for high quality beef should be higher than 79 points. Based on our recent experiments, the current report is intended to highlight relative importance of eating quality characteristics on consumer satisfactory rate, and threshold of eating quality grade. In addition, post-slaughter intervention techniques such as electrical stimulation and tenderstretch are given as examples of critical control points of palatability assurance program of Hanwoo beef.

사장교 케이블 진동저감을 위한 능동제어시스템

황인호,정철오,이종한,이종세,Hwang, In-Ho,Jeong, Cheol-Oh,Lee, Jong-Han,Lee, Jong-Seh 한국전산구조공학회 2007 한국전산구조공학회논문집 Vol.20 No.5

사장교 케이블은 구조적으로 휨강성과 감쇠력이 작아 풍우에 의해 쉽게 유해진동이 발생한다. 이러한 풍우진동을 저감시키기 위한 효과적인 방법으로 부가댐퍼를 장착하여 케이블의 감쇠력을 증가시키는 제어시스템이 널리 사용되어왔다. 그러나 댐퍼를 케이블의 정착부 부근에 설치할 수밖에 없는 구조적 한계로 인하여 충분한 감쇠력을 발휘하기 어렵다. 그러므로 본 논문은 수동제어시스템 보다 효과적으로 풍하중에 의한 케이블 진동을 제어하기 위한 능동제어시스템을 제안하였다. 제안된 능동제어시스템은 케이블의 정착단에 베어링 장치를 장착하여 케이블 단부에서 횡방향 변위가 가능하도록 모델링 하였으며, 앵커리지 내부에 장착된 능동댐퍼를 이용하여 적절한 제어력을 제공하도록 하였다. 능동제어를 위하여 최적제어 이론을 이용 LQG 조정기를 설계하였으며, 수치해석은 실제 교량인 서해대교의 최장 케이블을 대상으로 하여 기존의 댐퍼 시스템과 수동, 능동 댐퍼 부착에 따른 케이블의 진동제어성능을 비교 및 분석하였다. 연구결과 제안된 능동제어시스템은 효과적으로 사장교 케이블의 진동을 저감시킬 수 있는 시스템임을 입증하였으며, 기존의 부가댐퍼 시스템 보다 효과적으로 진동을 저감시킬 수 있을 것으로 사료된다. Rain-wind induced cable vibration can cause serious problems in cable-stayed bridge. External dampers attached to the cables have become widely accepted as an effective means for stay-cable vibration suppression. For very long stay-cables, however, such damper systems are rendered ineffective, as the dampers need be attached near the end of cables for aesthetic reasons. A recent study by the authors proposed that a movable anchorage system is replaced direct fixed support of the cable with a support through a bearing and damper. This paper extends the previous work by adding active control system to mitigate the cable vibration. The response of a cable with the proposed active control system is obtained and then compared to those of the cable with and without an external passive damper. The results show that the active control system can provide superior protection than the passive control system for a cable vibration.

공황장애의 임상적 특성과 Brain-Derived Neurotrophic Factor 농도와의 관계

황인호,박종일,양종철,Hwang, In-Ho,Park, Jong-Il,Yang, Jong-Chul 대한불안의학회 2015 대한불안의학회지 Vol.11 No.2

Objective : Brain-derived neurotrophic factor (BDNF) is implicated in the pathophysiology of several neuropsychiatric disorders. However, there are few studies on BDNF of panic disorder. In this study, we investigated plasma BDNF levels in patients with panic disorder, and evaluated whether there are associations between clinical characteristics of panic disorder and plasma BDNF levels. Methods : We included 110 patients with panic disorder and 110 health controls in the current study. Plasma BDNF levels were measured by the enzyme-linked immunosorbent assay (ELISA). Plasma BDNF level differences were evaluated according to the clinical characteristics, such as duration of illness, recent stressful life event, agoraphobia, and insomnia. Results : The mean plasma BDNF levels of patients with panic disorder were significantly lower, as compared with those of controls (192.50 pg/mL vs. 693.75 pg/mL, t=8.838, p<0.001). The mean plasma BDNF levels of patients who had recent stressful life events were significantly higher, as compared with those who did not ($269.79{\pm}358.96pg/mL$ vs. $136.94{\pm}187.06pg/mL$, t=-2.525, p=0.013). Conclusion : These results suggested that BDNF plays a potential role in the pathophysiology of panic disorder.

세풍대교 케이블 진동저감을 위한 댐퍼 시스템

황인호,안중산,윤자걸,Hwang, In-Ho,An, Jung-San,Yun, Ja-Geol 한국전산구조공학회 2013 전산구조공학 Vol.26 No.1

칼럼 - 생체기억 메카니즘과 한우고기 맛

황인호,Hwang, In-Ho 축산물품질평가원 2012 KAPE누리 Vol.196 No.-