The Cost Estimation for Decommissioning of a Nuclear Fuel Cycle Facility Using CERREX Based on ISDC Structure

JaeHyun Ha,KwanSeong Jeong,SeungKook Park,DaeSeo Koo,InHye Hahm,SangBum Hong,BumKyoung Seo 한국방사성폐기물학회 2018 한국방사성폐기물학회 학술논문요약집 Vol.2018 No.05

The Mediating Effect of Spectator Satisfaction in the Relationship between Affective Reaction and Intention to Attend Future Games: Comparison of Three Models

( Ha Jaehyun ),( Ha Jae-pil ) 한국체육학회 2018 International journal of human movement science Vol.12 No.1

The purpose of this study was to examine the potential mediating effect of spectator satisfaction in the relationship between affective reaction and intention to attend games through model comparisons. In order to accomplish the purpose of this study, three different models (direct effect, partial mediation, and fully mediation) were developed and tested. Total 261 questionnaires were disseminated and returned. Among them, nine questionnaires were discarded because they were not applicable. There were 252 usable questionnaires. Data were analyzed with frequency analysis, correlation analysis, confirmatory factor analysis, and structural equation modeling using SPSS 18.0 version and AMOS 18.0. The results of this study revealed that the fully mediated model was better because it was more parsimonious although both the partially mediated model and fully mediated model were not different. The fully mediated model indicated that spectators who exhibited more positive affective reaction to the team were more likely to be a great correspondence with intention to attend a game, which was fully mediated by spectator satisfaction.

Study on Creating and Optimizing a Task Sequence for Robotic Underwater Laser Cutting Using a Digital Manufacturing System

Jaehyun Ha,Dongjun Hyun,Sungmoon Joo,Ikjune Kim,Jonghwan Lee 한국방사성폐기물학회 2022 한국방사성폐기물학회 학술논문요약집 Vol.20 No.2

This study presents an example of creating and optimizing a task sequence required in an automated remote dismantling system using a digital manufacturing system. An automated remote dismantling system using a robotic arm has recently been widely studied to improve the efficiency and safety of the dismantling operations. The task sequence must be verified in advance through discrete eventbased process simulation in a digital manufacturing system to avoid problems in actual remote cutting operations as the main input of the automated remote dismantling system. The laser cutting method can precisely cut complicated target structures such as reactor internals with versatility, but a robot and a pre-prepared program are required to deploy sophisticated motion of the laser cutting head on the target structure. For safe and efficient dismantling operations, the robot’s program must be verified in advance in a virtual environment that can represent the actual dismantling site. This study presents creating and optimizing the task sequence of a robotic underwater laser cutting as part of the project of developing an automated remote dismantling system. A task sequence is created to implement the desired cutting path for the target structure using the automated remote dismantling system in the virtual environment. The task sequence is optimized for the posture of the laser cutting head and the robot to avoid collisions during the operation through discrete event-based process simulation since the target structure is complicated and the volume occupied by the laser cutting head and the robot arm is considerably large. The task sequence verified in the digital manufacturing system is demonstrated by experiments cutting the target structure along the desired cutting path without any problems. The various simulation cases presented in this study are expected to contribute not only to the development of the automated remote dismantling system, but also to the establishment of a safe and efficient dismantling process in the nuclear facility decommissioning.

Endoscopic Ultrasound신장 종양에 대한 내시경 초음파 유도하 세침흡인생검

Jaehyun Ha,Daejin Kim,Hyunsoo Kim,Chang Keun Park,Jaekwon Jung,Yun Jin Chung,Jaekwang Lee,Hanjun Ryu 대한상부위장관ㆍ헬리코박터학회 2021 Korean Journal of Helicobacter Upper Gastrointesti Vol.21 No.1

Traditionally, tissue biopsies of kidney lesions are usually performed with CT or percutaneous ultrasound guidance, but biopsies using EUS have rarely been reported. In this report, we describe a case of renal cell carcinoma (RCC) diagnosed using EUS-guided fine-needle aspiration biopsy. A 75-year-old woman taking aspirin due to stable angina continued to exhibit weight loss and anemia and visited the gastroenterology department. No bleeding was observed on upper and lower gastrointestinal endoscopy. A contrast- enhanced mass was observed in the left kidney, accompanied by 8.9×10.8 cm-sized necrosis suggesting RCC on abdominal CT. Chest CT showed masses in both lungs. We planned to administer targeted therapy after pathological confirmation using EUS. Aspirin was continued, and we performed fine-needle biopsy using a 22-gauge needle three times. No adverse events were observed after the procedure. Pathological examination confirmed RCC, clear cell type, and the patient is currently undergoing treatment with sunitinib. EUS-guided fine-needle aspiration biopsy is safe for liver, pancreatic, or other tumors accessible from the upper gastrointestinal tract. This technique shows fewer adverse events. To the best of our knowledge, there have been no other reports on EUS-guided fine-needle aspiration biopsy to identify RCC in Korea.

JSON 스키마 발견법에 대한 서베이 연구

하재현(Jaehyun Ha),윤주형(Joohyung Yun),고진호(Jinho Ko),한욱신(Wook-Shin Han) 한국정보과학회 2022 한국정보과학회 학술발표논문집 Vol.2022 No.12

대학운동선수의 조직공정성이 선수포기의도에 미치는 영향

하제현(Ha, Jaehyun) 한국스포츠산업경영학회 2018 한국스포츠산업경영학회지 Vol.23 No.6

본 연구는 대학운동선수가 지각하는 조직공정성과 선수포기의도와의 영향관계에서 비과업행동과 혁신저항의 매개효과와 종목특성의 조절효과를 규명하는데 그 목적이 있다. 본 연구의 목적을 달성하기 위해 부산광역시, 대구광역시, 경상남·북도에 위치한 6개 대학교의 대학운동선수를 대상으로 직접 방문하여 설문조사를 실시하였고 최종 자료분석에 부적절한 설문지 11부를 제외한 284부를 최종 분석에 사용하였다. 자료 분석을 위하여 SPSS Statistics 22.0과 AMOS 22.0을 사용하여 상관관계분석, 신뢰도 분석, 확인적 요인분석, 구조방정식모형분석을 실시하였다. 본 연구의 결과는 다음과 같다. 첫째, 분배와 상호작용공정성은 조직시민행동에 미치는 영향이 없는 것으로 나타났지만 절차공정성은 조직시민행동에 유의미한 영향을 미치는 것으로 나타났다. 둘째, 분배와 절차공정성은 반생산적 과업행동과 유미한 영향관계가 있는 것으로 나타났지만 상호작용공정성은 반생산적 과업행동에 영향관계가 없는 것으로 나타났다. 셋째, 분배와 절차공정성은 혁신저항과 유미한 영향관계가 있는 것으로 나타났지만 상호작용공정성은 혁신저항에 영향관계가 없는 것으로 나타났다. 넷째, 분배, 절차, 상호작용공정성은 선수포기의도에 미치는 영향이 없는 것으로 나타났다. 다섯째, 조직시민행동과 혁신저항은 선수포기의도에 유의미한 영향을 미쳤지만 반생산적 과업행동은 선수포기의도와 영향관계가 없는 것으로 나타났다. 여섯째, 조직시민행동은 절차공정성과 선수포기의도와의 관계, 혁신저항은 분배 및 절차공정성과 선수포기의도와의 관계에서 완전매개 역할을 하는 것으로 나타났다. 일곱째, 절차공정성과 조직시민행동, 분배공정성과 혁신저항, 상호작용공정성과 선수포기의도 간의 영향관계에서 종목특성의 조절효과가 있는 것으로 나타났다. The purpose of this study was to examine the mediating effect of non-task behavior(organizational citizenship behavior & counterproductive work behavior) and innovation resistance, and the moderating effect of characteristic of sports in the relationship between organizational justice and athlete dropout intention of college student-athletes. In order to accomplish this study, total 295 questionnaires were distributed to college student-athletes at six universities using a convenient sampling method. Among them, eleven questionnaires were excluded because they were not applicable. There were 284 usable questionnaires. Data were analyzed with reliability analysis, correlation analysis, confirmatory factor analysis through measurement model, and structural equation modeling using SPSS Statistics 22.0 and AMOS 22.0. The results of this study revealed that first, distributive and interactional justice didn"t contribute to organizational citizenship behavior, while procedural justice had a positive impact on organizational citizenship behavior. Second, distributive justice and procedural justice negatively contributed to counterproductive work behavior while interactional justice did not have an impact on counterproductive work behavior. Third, distributive justice and procedural justice negatively contributed to innovation resistance, while interactional justice did not have an impact on innovation resistance. Fourth, distributive, procedural, and interactional justice did not have an impact on athlete dropout intention. Fifth, organizational citizenship behavior and innovation resistance had a significant impact on athlete dropout intention, while counterproductive work behavior didn"t contribute to athlete dropout intention. Sixth, organizational citizenship behavior had a full mediating effect on the relationship between procedural justice and athlete dropout intention and innovation resistance had a full mediating effect on the relationship between distributive and procedural justice, and athlete dropout intention. Last, there existed the moderating effect of the sports characteristic on the relationship between procedural justice and organizational citizenship behavior, between distributive justice and innovation resistance, and between interactional justice and athlete dropout intention.

보행자 경로안내 API정보를 활용한 대중교통 접근성 영향요인 분석

하재현(Ha, Jaehyun),이수기(Lee, Sugie) 대한국토·도시계획학회 2017 國土計劃 Vol.52 No.3

플로우경험과 마케팅믹스, 관람만족, 팀충성도, 행동의도 간의 구조적 관계: 프로축구를 대상으로

하제현(Ha, Jaehyun) 한국스포츠산업경영학회 2021 한국스포츠산업경영학회지 Vol.26 No.6

본 연구는 프로축구를 대상으로 관중의 플로우경험, 구단의 마케팅믹스, 관람만족, 팀충성도, 행동의도 간의 구조적 관계를 규명하는데 그 목적이 있다. 본 연구의 목적을 달성하기 위해 프로축구 경기를 관람하는 관중을 연구대상으로 선정하고 편의표본추출법을 활용하여 총 250부의 설문지를 배포하여 225부의 설문지를 회수하였고 자료 분석에 부적절한 18부를 제외한 207부를 최종 자료로 사용하여 분석하였다. 자료 분석은 SPSS 25.0과 AMOS 25.0을 활용하였으며 그 결과는 다음과 같다. 첫째, 플로우경험은 관람만족, 팀충성도, 행동의도에 정(+)적인 영향관계가 있는 것으로 나타났다. 둘째, 마케팅믹스는 관람만족, 팀충성도, 행동의도에 유의한 영향관계가 없는 것으로 나타났다. 셋째, 관람만족은 팀충성도와 행동의도에 정(+)적인 영향관계가 있는 것으로 나타났다. 넷째, 팀충성도는 행동의도에 정(+)적인 영향관계가 있는 것으로 나타났다. 본 연구에서 도출된 결과를 근거로 제시할 수 있는 시사점은 다음과 같다. 프로축구 구단의 관중 증가 및 유지를 위한 방안 및 전략을 수립할 때 마케팅믹스 요인 보다는 플로우경험의 구성요인인 즐거움, 주의집중, 시간왜곡을 경험할 수 있는 경기를 제공하는 것이 중요하다고 볼 수 있다. The purpose of this study was to examine the structural relationships among flow experience, marketing mix, spectator satisfaction, team loyalty, and behavioral intention toward professional soccer franchises. In order to achieve the purpose, total 250 questionnaires were distributed to spectators who attend a game of 2020 regular league with use of convenient sampling method. 225 questionnaires were returned. Among them, eighteen questionnaires were excluded due to incompletion. There were 207 usable questionnaires. Data were analyzed with frequency analysis, correlation analysis, reliability analysis, confirmatory factor analysis, and structural equation modeling using SPSSWIN Ver. 25.0 and AMOS 25.0. The results of this study were as follows. First, flow experience positively contributed to spectator satisfaction, team loyalty, and behavioral intention. Second, marketing mix did not have an influence on spectator satisfaction, team loyalty, and behavioral intention. Third, spectator satisfaction positively contributed to team loyalty and behavioral intention. Last, team loyalty positively contributed to behavioral intention.

통행특성별 OD자료와 Community Detection 기법을 활용한 공간위계별 생활권 설정 연구

하재현(Ha, Jaehyun),이수기(Lee, Sugie) 대한국토·도시계획학회 2016 國土計劃 Vol.51 No.6

API 경로안내 정보를 활용한 대중교통 서비스 취약지 분석

하재현(Ha, Jaehyun),이수기(Lee, Sugie) 대한국토·도시계획학회 2016 國土計劃 Vol.51 No.5