안전보건에 대한 경영진의 지지가 근로자 안전인식에 미치는 영향

한승조,배영민,Han, Seung Jo,Bae, Young Min 한국디지털정책학회 2021 디지털융복합연구 Vol.19 No.7

The purpose of this study is to investigate effects of management support for health and safety on workers' safety perception. Since the 1990s, Korea's national competitiveness has been rising rapidly, but efforts to prevent and cope with industrial accidents are still insufficient. Particularly there is a big movement to strengthen corporate responsibility for serious accidents in the 2020s. In this study structural equation model(SEM) was constructed and quantitatively analyzed in order to know how management's support affects the organization, system, and communication related to safety and health in the company, and ultimately how it has an effect on workers' safety perception. 4,169 questionnaires conducted by the Institute for Occupational Safety and Health were used as observation variables, and 5 hypotheses were established and were verified in SEM. As management support increases, organization & institution for a safe workplace, communication related with safety and health within the company become more active. Finally management support has a positive effect on workers' safety perception. The results of this study imply that management needs to increase awareness of the importance of safety and health before all measures such as organizations, institutions, and communication related to safety and health. 본 연구의 목적은 안전보건과 관련하여 경영진의 지지가 근로자 안전인식에 미치는 영향을 정량적으로 분석하는 것이다. 1990년대 이후로 우리나라는 국가경쟁력이 급속하게 상승하고 있지만, 아직까지 산업재해 예방과 대처를 위한 노력이 미흡한 실정이며, 특히 2020년대에 들어서면서 기업의 중대재해 책임을 강화하려는 움직임이 크게 일어나고 있다. 본 연구에서는 경영진의 지지가 해당 업체의 안전보건 관련 조직 및 제도, 의사소통에 어떻게 영향을 미치고, 궁극적으로 근로자들이 안전의식에 어떠한 영향을 미치는 지를 구조방정식모델을 구성하여 정량적으로 분석한다. 구조방정식모델을 위해 산업안전보건연구원에서 수행한 4,169명의 설문지가 관측변수로 활용되었으며, 5개의 가설이 설정되어 가설검증이 이루어졌다. 안전보건 경영과 관련된 경영진의 지지가 높아지면 조직 내의 안전보건 관련 조직과 제도의 구성 및 운영, 안전보건 관련 의사소통이 활발해지고, 최종적으로 사업장에서의 근로자 안전의식 및 행동도 증대되는 효과가 있는 것으로 분석되었다. 본 연구결과는 안전보건과 관련된 조직, 제도, 의사소통 등의 제반 조치 이전에 경영진의 안전보건에 대한 중요성 인식 증대가 필요함을 함의한다.

북한에 대한 인지편향(기준점편향) 이 통일인식에 미치는 영향

한승조,배영민,Han, Seung Jo,Bae, Young Min 한국융합보안학회 2021 융합보안 논문지 Vol.21 No.1

The purpose of this study is to investigate reunification perception among groups with different cognitive bias(anchoring bias) through empirical studies. This study assumes that cognitive bias occurs according to the content of N. Korea provided in school education, and that the cognitive bias formed in youth creates a difference in perception of N. Korea and reunification. For empirical study, a survey of reunification awareness conducted by the Institute for Peace an Unification Studies-Seoul National University was used, and the two groups are divided into A-group that chose "anti-communism or security" and B-group that did "reunification interests, multi-culturalism and understanding North Korea" according to N. Korea content which was encountered in school education during adolescence. A-group recognized N. Korea as a hostile target even after becoming an adult, while B-group regarded N. Korea as a one of dialogue and cooperation. This analysis illustrates the existence of cognitive bias between the two groups because of N. Korea content which was given in school education. A-group had a lower percentage than B-group in terms of the benefits of reunification to S. Korea and the need for more dialogue and compromise with N. Korea. However, there was no difference between two groups in terms of acceptance of N. Korean defectors. This research result could be a reference to the direction of school education policies relating to reunification in that early school education affects reunification awareness and perception related with N. Korea even in adulthood.

전쟁이론 관점에서의 COVID-19 Pandemic 분석

한승조,위진우,Han, Seung Jo,We, Jinwoo 한국융합보안학회 2021 융합보안 논문지 Vol.21 No.3

The purpose of this study is to examine COVID-19 situation in temrs of war-theory and to find out ways to overcome it. Just as the war changes the paradigm in the international situation and the national crisis management system, the current COVID-19 pandemic is bringing about the entry of the so-called "New Normal" era having the characteristics including untact culture. Although academic research on COVID-19 is mainly dealt with in terms of medical, tourism, and economics, the military research has not yet begun from the perspective of military science or war theory. In the concept of a comprehensive crisis that COVID-19 can cause enormous damage to the life and property of a country, it can be regarded as a target or enemy to be overcome. Among various war theories, the similarities with COVID-19 incident are analyzed in terms of the nature and aspect of the war and the factors of victory. Qualitative and questionnaire analysis results show that the COVID-19 outbreak is very similar to war when considering a variety of war-characteristics. In addition this research proposes ways to overcome COVID-19 based on the victorious factors of the past war, and predicts the impact of the international community after the end of COVID-19 pandemic. As a result of analyzing the priority of overcoming factors through the Analytical Hierarchy Process (AHP) shows that clear goals and establishment of alliances should be prioritized for successfully overcoming COVID-19.

자기 효능감이 직장 스트레스 및 워라밸에 미치는 영향: 구조방정식모델 활용을 중심으로

한승조(Seung Jo Han),이세호(Se Ho Lee) 한국산학기술학회 2020 한국산학기술학회논문지 Vol.21 No.12

본 연구의 목적은 구조방정식 모델을 이용하여 직장 내 자기 효능감이 직장 스트레스와 워라밸에 미치는 영향을 정량적으로 분석하고, 워라밸을 높이는 방안을 제시하는 것이다. 정부에서 주 52시간 근로정책을 추진하면서 일과 삶의 균형을 의미하는 워라밸이 사회 전반에 걸쳐 중요한 이슈가 되고 있다. 또한, 가정이나 교육계에서 주로 언급되고 있는 자기 효능감은 그 범위가 가정 및 교육계뿐만 아니라 직장 내에서도 그 중요성이 날로 증대되고 있는 실정이다. 구조방정식 모델에 포함될 관측변수용 자료들은 5,454명의 성인으로부터의 설문을 통해 획득되었으며, 모델 구축 및 통계분석을 위해 AMOS 21이 활용되었다. 직장에서의 자기 효능감은 직장 스트레스와 음의 상관관계를 보이고 있으며, 자기효능감이 높아질수록 워라밸 수준도 높아지는 것이 분석되었다. 이러한 연구결과는 직장 내에서 업무 중심적인 직장인이 가정보다 직장에 노력과 시간을 더 투자하기 때문에 워라밸이 낮을 것이라는 의견을 부정한다. 추가적으로 본 연구결과는 육군에서 추진하고 있는 워라밸 정책의 분석에도 활용될 수 있다. This study quantitatively analyzed the effects of self-efficacy in the workplace on job-stress and work-life balance (WLB) using a structural equation model (SEM) to seek ways to increase the WLB. Because the current government promotes the 52-hour weekly policy, WLB that refers to the balance between work and life that is used throughout society. In addition, self-efficacy, which was used mainly in the home and education system, has expanded its scope of application, and efforts to increase it in the workplace are working as demand for the times. The observation variables to be included in the SEM were collected from a questionnaire of 5,454 adults, and AMOS 21 was used for statistical analysis. As a result of the analysis, self-efficacy in the workplace has a negative correlation with stress, and a higher self-efficacy means a higher WLB. The results of this study did not show that the more workers are passionate about their work in the workplace due to work-oriented thinking and behavior rather than home had a lower WLB. In addition, these results can be used to analyze the WLB policy in the ROK Army.

미사일 비행시험과 관련된 정량적 의사결정: 자료포락분석(DEA)을 통한 시험장 선정을 중심으로

한승조(Seung Jo Han),이승만(Syng-Man Rhee),박용수(Yong-Soo Park),윤성한(Sung-Han Yoon),김헌수(Heun-Soo Kim) 한국항공우주학회 2020 한국항공우주학회 학술발표회 논문집 Vol.2020 No.7

비대칭무게중심을 지닌 물체 들기 작업시 허리부위 등근육 부하 및 피로 분석

한승조(Seung Jo Han),김선욱(Sun-Uk Kim) 한국산업경영시스템학회 2012 한국산업경영시스템학회지 Vol.35 No.2

This study is aimed to show that an asymmetric load in the frontal plane leads to an increase in low back loading and fatigue in comparison with a symmetric load when workers lift an external weight by investigating previous studies and verifying the phenomenon with an experiment. Ten male subjects are required to lift and hold an given external load at 70cm height during 50sec, then the EMG amplitude and median frequency on bilateral low back muscle groups (Longissimus, Iliocostalis, and Multifidus) are recorded and analyzed. Independent variables are two-level load weight (13kg, 20kg) and three-level LCG (Center, 6.5cm to the right, and 13cm to the right), and dependent variables are EMG amplitude average, difference, and Fatigue Index (FI). Results show that load weight increases significantly amplitude average and FI, but LCG does significantly amplitude difference and FI significanlty (P-value < 0.05). Also the correlation coefficient between amplitude difference and FI is over 0.99. These implies that trunk loading should be explained by not EMG amplitude but muscle fatigue aspect since the association between an external load and amplitude is linear, but the relationship between an external load and median frequency as muscle fatigue index is almost exponential.

운동 강도가 손 안정성에 미치는 영향

한승조(Seung Jo Han),김선욱(Sun-Uk Kim),구교찬(Kyo Chan Koo) 한국산업경영시스템학회 2013 한국산업경영시스템학회지 Vol.36 No.1

This study is aimed to investigate the association between anaerobicㆍaerobic exercise intensity and hand steadiness. Hand steadiness is the decisive contributor to affecting the job performance just as in the rifle shooting and archery in sports and the microscope-related jobs requiring hand steadiness in industries. In anaerobic exercise condition hand steadiness is measured through hand steadiness tester having 9 different diameter holes after each subject exerts 25%, 50%, 75%, and 100% of maximum back strength. In aerobic exercise occasion it is evaluated at each time heart rate reaches 115%, 130%, and 145% of reference heart rate measured in no task condition after they do jumping jack. The results indicate that an increased intensity in both types of exercise reduces hand steadiness, but hand steadiness at 25% of maximum back strength and 115% of reference heart rate is rather greater than at no exercise. Just as the relation between cognitive stress and job performance has upside-down U form, so does the association of physical loading to hand steadiness, which means that a little exercise tends to improve hand steadiness in comparison with no exercise.

기상조절 기술을 통한 대공위협 방어 가능성 연구 : 전리층 변조기술을 중심으로

한승조(Seung Jo Han),이승만(Seung-Man Rhee),홍동욱(Dong-Wook Hong) 한국항공우주학회 2019 한국항공우주학회 학술발표회 논문집 Vol.2019 No.11

완성형 한글을 위한 압축과 암호화 방법

한승조(Seung Jo Han),이상호(Sang Ho Lee),구연설(Yeon Seol Koo) 한국정보과학회 1993 정보과학회논문지 Vol.20 No.9

정보를 컴퓨터에 저장, 보관하거나 채널을 통해 전송하기 위해서는 효율성 (압축코딩), 안전성 (암호코딩) 그리고 신뢰성 (채널코딩)이 필요하다. 본 논문에서는 LZW알고리즘과 DES알고리즘을 확장하여 LZWH1, LZWH2 그리고 HDES를 설계한다. 또한 한글에 대한 문자사용율을 조사하여, KSC 5601의 완성형 한글에 있어서 압축과 암호의 결합에 대한 S/W(LZWHDES)를 C언어로 구현하며, 평가지표에 따라 성능을 분석한다. 분석에 있어서 LZWH2가 PKZIP보다 압축율이 0.136만큼 우수함을 보이며, HDES는 키 길이가 112비트로 증가되고, Differential Cryptanalysis에 대한 일부 대응방안으로 HDES는 DES보다 암호함수의 반복횟수가 2회 증가되며, 그리고 SAC과 상관계수에 만족하는 S-box를 HDES에 적용한다. 따라서 LZWHDES가 PKZIP과 DES를 결합한것 보다 우수함을 보인다. To store and keep information in computers and transmit it through channels, efficiency (compression coding), security (secrecy coding) and confidentiality (channel coding) are required. This paper is to design LZWH1, LZWH2 and HDES by extending the LZW and DES algorithm. By investigating the ratio of charcter use for Hangenl, we implement S/W(LZWHES) with C-language for the concatenation of compression and secrecy coding in complete form Hangeul of KSC 5601, and analyze their capacity according to estimation indices. From the analysis, it is found that LZMH2 is superior to PKZIP as 0.136 in compression ratio, HDES was increased to 112 bits in key length. HDES was increased 2-rounds in repeat frequency of secure function more than DES as a partial countermeasure of Differential Cryptanalysis, and the S-box satisfying the SAC and correlation coefficient is applied into HDES. Therefore, LZWHDES is superior to the concatenation of PKZIP and DES.

비대칭무게중심의 물체취급이 허리에 미치는 영향에 대한 모델 연구

한승조(Seung Jo Han),김선욱(Sun-Uk Kim) 한국산업경영시스템학회 2012 한국산업경영시스템학회 학술대회 Vol.2012 No.-

The goal of this study is to suggest the conceptual model explaining the mechanism that an asymmetric load elevates low back pain(LBP). The model suggested shows that an asymmetric load in the frontal plane leads to unbalanced hand load, which affects the difference between right and left EMG amplitude on the pairwise back muscles and the increase in muscle fatigue compared with a symmetric load. The model is verified by an experiment that ten male subjects are required to lift and hold at waist height each symmetric and asymmetric load, then the EMG data collected is analyzed concentrating on median frequency used as one muscle fatigue index. The results show that muscle fatigue in lifting an asymmetric load is significantly more than in doing a symmetric load in both low and high load weights. The results means that the movement of load center of gravity(LCG) within a box handled can be one factor elevating LBP, that condition should be controlled by administrative or engineering interventions if possible.