IoT / Wearable 향 SiP 패키징 기술

박상혁,김소영 한국전자파학회 2016 전자파기술 Vol.27 No.2

위성 궤도오차 산출을 위한 민감도 해석

박상혁,유창경,최수진 한국항공우주학회 2011 한국항공우주학회 학술발표회 논문집 Vol.2011 No.11

위성의 충돌위험 예측을 위해 이용되는 충돌확률은 궤도오차의 분산정보를 바탕으로 산출된다. 충돌확률에 따라 회피기동의 범위가 결정되므로 정확한 궤도오차분산 산출은 효율적인 충돌회피를 위하여 중요하다. 이전의 연구들은 대게 위성의 궤적 정보를 이용하여 추정한 오차 정보 중에서 위치오차의 전파에만 관심을 두고 속도오차의 전파에는 관심을 두지 않는다. 그러나 위성의 궤도오차는 속도오차의 전파에도 큰 영향을 받기 때문에 정확한 궤도오차분산의 산출에는 속도오차가 고려되어야 한다. 본 연구에서는 위치오차와 속도오차의 전파를 위하여 궤도방정식으로부터 유도된 민감도 함수를 이용한 해석을 수행한다. 이때 단순히 민감도 함수를 이용해 초기오차를 전파하는 것은 초기오차분산을 전파하는 것과 다르기 때문에 초기오차분산으로부터 전파된 궤도오차분산을 산출하는데 Unscented 변환을 적용한다. A probability of collision required to predict a collision risk is calculated on the basis of orbital error covariance. To calculate accurate error covariance is important for efficient collision avoidance because the range of avoidance maneuver is determined through a probability of collision. The previous studies have an interest to only the propagation of position error of the error covariance estimated from orbital data of satellite. However the velocity error has to be considered for accurate calculation because the orbital error is affected by propagation of the velocity error. In this paper, we perform an analysis through the sensitivity function derived from the orbital equation for the propagation of position and velocity error. In here, we apply unscented transformation in order to obtain the propagated error covariance of the orbit because the propagation of initial error covariance is different from the propagation of the initial error through the Sensitivity Analysis.

Critical Success Factors for Implementation of e-Business in the Public Sector:A Case Study of the Korean ‘Onbid’ Asset-Management System

박상혁,김석규 한국데이터전략학회 2008 Journal of information technology applications & m Vol.15 No.3

The purpose of this study is to identify the critical factors for the successful implementation of e-business in the public sector. The paper reports on a case study of the ‘Onbid’ asset-management system developed by the Korean Asset Management Corporation (KAMCO). ‘Onbid’ system is an e-marketplace for trading in public assets, including the disposition by public sale of real estate. Through this case study, the paper: (i) explores the changes in organizational culture that are required for successful e-transformation in organizations of public sectors; and (ii) identifies the critical success factors for the implementation of e-business in the public sector.

도덕은 정언명법인가 아니면 가언명법인가?

박상혁 철학연구회 2006 哲學硏究 Vol.0 No.73

실내 위치추적 시스템의 비즈니스 모델 사례 연구

박상혁,박영식,김진영 사단법인 한국위성정보통신학회 2013 한국위성정보통신학회논문지 Vol.8 No.4

Recently, users who are interested in the service at indoor spaces is increasing. An indoor positioning system can minimizea range of positioning error using a variety of wireless communication infrastructure. Also, the system improves an indoorpositioning accuracy by combining a mobile communication network. However, flexible positioning technologies regardlessof an environment are insufficient. Therefore, this is time for a systematic study on an indoor positioning system businessmodel. This paper classify differences between an indoor positioning system technology and outdoor positioning systemtechnology. And we research a construction and application of the indoor positioning system that is adapted a wirelesscommunication system (Wi-Fi, Bluetooth, RFID, UWE, Fingerprint, etc.) in domestic and foreign. We present a successfulmodel of indoor positioning system and the development for future systems. 최근 실내 공간 사용자들을 대상으로 한 서비스의 관심이 증가하고 있다. 실내 위치추적 시스템은 다양한 무선통신 인프라를 활용하여 측위 오차의 범위를 최소화 할 수 있고 이동통신망과 결합하여 실내 측위 정확도를 향상시킬 수 있다. 하지만 환경에 상관없이유연하게 동작하는 위치추적 시스템의 기술은 미흡한 실정이다. 따라서 체계화된 실내 위치추적 비즈니스 모델에 관한 연구가 더욱필요한 시점이다. 본 논문의 목적은 실내·외 위치추적 시스템의 측위기술 차이점을 분류하고 실내 위치추적 시스템에 적용되는 무선통신 방식(Wi-Fi, Bluetooth, RFID, UWB, Fingerprint 등)의 기술방식과 다양한 국내·외 구축사례 및 활용사례를 연구하고 이를통해 성공적인 실내 위치추적 시스템 모델 설정과 향후 시스템 발전방향을 제시한다.

엘리트 유도 선수들의 심리적 강점 측정 도구 개발 연구

박상혁,김태완 한국체육측정평가학회 2018 한국체육측정평가학회지 Vol.20 No.1

The purpose of this study was to develop a scale to measure the psychological strengths that elite Judo athletes utilize in a successful competition through an open questionnaire. Therefore, open questionnaires were conducted for 23 national players to explore psychological strengths factors. And then, the Judo athlete psychological strengths questionnaire developed through the triangle verification was given to 186 players(high school, collage, national and business team). As a result of contents analysis, the factors of psychological strength perceived by elite Judo athletes were 11 items and 73 questions(belief, regulation, endurance, creativity, analysis, sincerity, practice, concentration, self-control, confidence, fight). Also, as a results of exploratory factor analysis of 11 items(73 questions), the concentration factor was deleted and it was revealed that the primary factor structure of 10 items and 62 questions, The results of confirmatory factor analysis of 10 items(62 questions) were finally confirmed with 10 items and 30 questions(belief, regulation, endurance, creativity, analysis, sincerity, practice, self-control, confidence, fight). Therefore, in order to examine the discriminant validity of elite Judo psychological strengths, the multivarirate analysis was conducted according to the affiliation. This results showed that national and business team players had higher psychological strengths than high school athletes in regulation, endurance, analysis, and self-control 본 연구는 엘리트 유도 선수들이 성공적인 시합상황에서 활용하는 심리적 강점에 대한 내용을 개방형 설문을 통해 알아보고 이를 측정할 수 있는 도구를 개발하는데 목적이 있다 . 따라서 23 명의 국가대표 선수들을 대상으로 개방형 설문을 실시하여 심리적 강점 요인을 탐색하였으며 , 이후 3 인 합의 검증을 통해 개발된 유도 선수 심리적 강점 설문지를 186 명의 고등학교 , 대학교 , 실업 및 국가대표 선수들에게 배부 작성 회수토록 하였다 . 이에 따른 내용분석결과 엘리트 유도 선수들이 지각하는 심리적 강점 요인은 신념 , 조절 , 끈기 , 창의 , 분석 , 성실 , 실천 , 집중 , 절제 , 자신감 , 투지의 11 개 73 문항으로 나타났다 . 또한 11 개 73 문항에 대한 탐색적 요인분석결과 집중 요인이 삭제되어10 개요인 62 문항의 1 차 요인구조가 나타났으며 , 10 개요인 62 문항에 대한 확인적 요인분석결과 각각 요인에 3 개 문항을 포함하여 신념 , 조절 , 끈기 , 창의 , 분석 , 성실 , 실천 , 절제 , 자신감 , 투지의 10 개요인 30 문항으로 최종 확인되었다 . 따라서 이러한 과정을 거쳐 개발된 엘리트 유도 심리적 강점 척도에 대한 변별타당도를 알아보기 위하여 소속에 따른 다변량 분석을 실시한 결과 조절 , 끈기 , 분석 , 절제 요인에서 국가대표 및 실업 팀 선수들이 고등학교 선수들에 비하여 높은 심리적 강점을 갖고 있는 것으로 확인되었다.

Clinical Importance of Morphological Multilineage Dysplasia in Acute Myeloid Leukemia with Myelodysplasia Related Changes

박상혁,지현숙,박서진,장성수,박찬정 대한진단검사의학회 2010 Annals of Laboratory Medicine Vol.30 No.3

Background : AML with myelodysplasia related changes (AML MRC) is known to show a poor prognosis compared with de novo AML, but controversies exist about the prognostic impact of multilineage dysplasia (MLD) among MRC. We investigated the prognostic impact of MLD in AML MRC. Methods : A total of 357 patients newly diagnosed as AML at Asan Medical Center from January 2001 to December 2005 were analyzed. They were diagnosed and classified as AML with recurrent genetic abnormalities, AML MRC, and AML not otherwise specified (AML NOS). Prognostic markers including overall survival (OS) and event free survival (EFS) were obtained through retrospective analysis of electronic medical records. Results : AML MRC patients showed a lower complete remission (CR) rate (44.7% vs. 64.9%, P=0.002) and shorter OS (297 vs. 561 days, P=0.004) and EFS (229 vs. 374 days, P=0.004) than AML NOS patients. Patients with MLD among AML MRC also showed a lower CR rate (37.7%, P=0.001)and shorter OS (351 days, P=0.036) and EFS (242 days, P=0.076) than AML NOS patients. However, among AML MRC patients, there were no differences in OS, EFS and CR between patients with and without MLD. Conclusions : AML MRC patients showed a lower CR rate and shorter OS and EFS than AML NOS patients. AML MRC patients with MLD showed similar results and their prognosis was not different from those without MLD. MLD findings among AML MRC could be an independent poor prognostic factor in de novo AML. (Korean J Lab Med 2010;30:231-8)

Cell Population Data NE-SFL and MO-WX From Sysmex XN-3000 Can Provide Additional Information for Exclusion of Acute Promyelocytic Leukemia From Other Acute Myeloid Leukemias: A Preliminary Study

박상혁,김형회,김인숙,이종윤,장철훈,이은엽 대한진단검사의학회 2016 Annals of Laboratory Medicine Vol.36 No.6

A Case with Coexistence of Major and Minor BCR/ABL Fusion Transcript at Lymphoblastic Crisis of Chronic Myelogenous Leukemia in Patients with Major BCR/ ABL Positivity during Chronic Phase

박상혁,지현숙,조영욱,장성수,박찬정,임호준 대한진단검사의학회 2013 Annals of Laboratory Medicine Vol.33 No.1

Presence of Differentiating Neuroblasts in Bone Marrow is a Favorable Prognostic Factor for Bone Marrow Metastatic Neuroblastoma at Diagnosis

박상혁,김솔잎,박찬정,장성수,지현숙,고경남,임호준,서종진 대한진단검사의학회 2013 Annals of Laboratory Medicine Vol.33 No.2

Background: The prognostic impact of the presence of differentiating neuroblasts in bone marrow (BM) remains unclear in BM metastatic neuroblastoma (NB). We aimed to identify the prognostic impact of differentiating neuroblasts in BM at diagnosis and after chemotherapy. Methods: A total of 51 patients diagnosed with BM metastatic NB at Asan Medical Center between January 1990 and July 2005 were enrolled. BM histology and laboratory data along with overall survival (OS) were compared with regard to the differentiation status of neuroblasts in BM at diagnosis and after chemotherapy. Results: Among the 51 patients, 13 (25.5%) exhibited differentiating neuroblasts in BM at diagnosis and 17/51 (33.3%) exhibited them after chemotherapy. The only significant difference among patient groups was the improved OS in patients with differentiated neuroblasts in BM at diagnosis (P =0.021). In contrast, the differentiation status of neuroblasts in BM after chemotherapy did not affect OS (P =0.852). Conclusions: Our study is the first report describing the presence of differentiating neuroblasts in BM. The presence of differentiating neuroblasts in BM at diagnosis may be a favorable prognostic factor for patients with BM metastatic NB; however, the same phenomenon after chemotherapy is irrelevant to prognosis.