단일 술자가 시행한 복강경 담낭 절제술 621예에 대한 임상적 고찰

박하경,이윤식,박진현 대한내시경복강경외과학회 2009 Journal of Minimally Invasive Surgery Vol.12 No.2

Purpose: Laparoscopic cholecystectomy (LC) has been the treatment of choice for acute and chronic disease of the gallbladder. We have performed 621 cases of LC from January 02 2001 to April 30 2008. This study aims to clinically analyze 621 cases of LC that were performed by a single surgeon over a 7 year period and to evaluate the effectiveness and safety of laparoscopic treatment for gallbladder disease. Methods: From January 02 2001 to April 30 2008, 621 patients underwent LC at the Department of Surgery by a single surgeon. We retrospectively analyzed the patients' ages, gender distribution and chief complaints, the operation times, the duration of hospitalization, the conversion rate to open cholecystectomy and the causes, the diagnostic methods and the postoperative complications through a review of the patients' charts. Results: The mean age was 46 years and the ratio of males to females was 1:1.4. The most common chief complaint was right upper quadrant pain (52.97%). The mean operative time was 67.37 minutes and the duration of hospitalization was 5.12 days and the duration of postoperative hospitalization was 3.86 days. The conversion rate was 3.29% and the most common cause of conversion was anatomic uncertainty due to inflammatory adhesion. Abdominal sonography was the most common diagnostic method and this was performed in 73.27% of the patients. The postoperative complication rate was 1.93%. Conclusion: LC has become the gold standard for the treatment of benign gallbladder diseases. We think that LC is effective and safe, and even at a secondary care hospital, if the surgeon has accumulated operative experience and improved operative skill.

STS 자료를 활용한 ARCS 수업전략이 중학생의 학업성취도 및 과학에 대한 학습태도에 미치는 영향 : 생식과 발생 단원을 중심으로

박하경,김선영,문두호 韓國生物敎育學會 2010 생물교육 Vol.38 No.4

The purpose of this study was to investigate the effect of Keller's ARCS strategy using STS materials on the middle school students' learning achievement in the unit of reproduction and development, learning attitude toward science, and the perception on STS. The experimental group was taught by the ARCS strategy using STS materials, while the control group was taught by the traditional teaching method. The results indicated that the experimental group and control group students represented the similar scores on learning achievement in the post-test 1 right after the treatment (p>.05). In the post-test 2 after 4 months, however, the experimental group represented the higher scores than the control group did (p<.01), indicating that the experimental group students retained their knowledge. In addition, the experimental group students represented the higher scores in learning attitude toward science as well as STS perception than the control group students did (p<.05). Overall, ARCS strategy using STS materials helped retain students' knowledge, and improved learning attitude toward science, as well as perception on STS.

표준 연구 연대기: 표준 및 표준화 인식 제고

박하경,김충환 표준인증안전학회 2023 표준인증안전학회지 Vol.13 No.3

본 연구는 표준과 관련된 다양한 연구 중에서 표준 및 표준화에 대한 이해와 인식을 제고하는 목적의 연구 동향을 살펴보고, 이를 바탕으로 국가기술표준 경쟁력 강화의 한 방법으로써 표준 및 표준화에 대한 인식 제고를 위해 관련 연구자들에게 필요한 역할을 정립하기 위하여 수행되었다. 연구 동향 분석과 관련된 유사 논문을 참조하여, 연구 특성으로 연구 대상, 연구 목적, 연구 방법, 게재 학술지를, 연구자 특성으로 연구자 구성, 소속, 학문 분야를 분석 준거로 하는 분석 틀을 개발하였고, 1999년부터 2022년까지 학술지에 게재된 59편의 표준 및 표준화에 대한 이해와 인식 제고 목적의 논문을 대상으로 분석을 수행하였다. 먼저, 해당 연구가 시기별로 어떤 경향을 보이는지 살펴본 결과, 2012년 이후 관련 논문 수가 증가하다가 2017-2018년을 기점으로 감소하였다. 이는 국가표준․인증제도 선진화 방안이 수립되고 한국이 ISO 이사국으로 선출된 시기와 맞물려 관련 연구가 증가하였으나 이후 이러한 대외적 요소나 정책적 효과가 줄어들어 연구자들의 표준화 인식 및 보급에 대한 관심이 줄어들었기 때문으로 볼 수 있다. 또한, 연구 특성에 대해서 살펴본 결과, 연구 방법은 양적 연구 중에서는 조사 연구의 비중이 높았고, 질적 연구 중에서는 사례 연구의 비중이 크게 나타났다. 개발 연구와 실험 연구의 비중은 낮았으며, 주로 학생 교육이나 동향 파악 등의 목적으로 연구가 이루어졌다. 마지막으로 연구자 특성에 대해서 살펴본 결과, 2015년을 기준으로 2인 및 3인 이상 공동 연구가 크게 증가하였고 연구자 소속도 대학이 크게 증가한 것을 통해 대학이나 산업체와의 공동 연구가 활발하게 이루어졌음을 알 수 있다. 종합적으로, 표준 및 표준화 인식 제고 관련 연구는 2015-2018년 기간에는 정부 지원 사업 중심으로 활발하게 이루어졌지만, 현재는 저조한 것으로 보아 연구자들이 표준 및 표준화 인식 제고에 대한 동기를 얻는 데 정부의 정책적인 지원이 큰 영향을 미쳤다고 분석되었다. 따라서 앞으로의 연구가 활성화되기 위해서는 대학교, 산업체, 행정기관 간의 연계가 활발하게 이루어지고 다양한 지원 체계가 갖추어지는 것이 우선되어야 함을 알 수 있다. 결과에 대한 분석을 바탕으로, 표준화 연구자 및 종사자들의 표준 및 표준화 인식 제고 관련 활동 적극 참여, 일반인과 산업체를 대상으로 하는 홍보 및 교육 확대, 산학관의 역할 명확화 및 유기적인 협력 관계 구축, 국외 연구 및 사례 분석을 통한 벤치마킹 등을 제언하였다. This study aimed to investigate the research trends in various studies related to standards, with the objective of enhancing understanding and awareness of standards and standardization. Additionally, the study sought to identify the roles that researchers play in raising awareness of standards and standardization to strengthen the competitiveness of national technical standards. To analyze these trends, we developed a framework based on research characteristics such as research object, research purpose, research method, and publication journal, as well as researcher characteristics including researcher composition, affiliation, and academic field. The analysis focused on 59 papers published in academic journals between 1999 and 2022 that aimed to raise understanding and awareness of standards and standardization. The temporal trend analysis revealed an increase in studies related to standardization awareness raising after 2012, followed by a decrease in 2017-2018. This increase can be attributed to the establishment of the National Standards and Certification System Advancement Plan and Korea's election to the ISO Board of Directors. However, the subsequent decline in research activity can be attributed to the diminishing influence of these external factors and policy effects, resulting in decreased interest among researchers in standardization awareness and dissemination. Regarding the characteristics of the research, survey research exhibited a higher proportion among quantitative studies, while case studies were more prevalent among qualitative studies. The proportion of developmental and experimental research was relatively low, and research primarily focused on educational purposes or identifying trends. In terms of researcher characteristics, collaborative research involving universities and companies became more common, as evidenced by a significant increase in two-and three-person collaborations since 2015. Additionally, the number of researchers affiliated with universities experienced a notable rise. Overall, research on standards and standardization awareness raising was active during the period of 2015-2018, predominantly driven by support projects. However, the current state of research in this area is relatively low, indicating that government policy support has played a significant role in motivating researchers to raise awareness of standards and standardization. To invigorate future research, it is crucial to establish active connections between research institutes, universities, and companies, and implement diverse support systems. Based on the analysis results, it is recommended to explore methods to promote and educate the general public and industrial companies, support their participation in related research and standardization activities to enhance their capabilities, and facilitate discussions on utilization through literature and content analysis, development, and case studies.

헤테로코어형 광파이버 센서를 이용한 콘크리트 변형량 측정용 매립형 센서모듈의 개발

박하경(Park, Ha Kyoung),양희원(Yang, Hee Won),이환우(Lee, Hwan Woo) 대한토목학회 2021 대한토목학회 학술대회 Vol.2021 No.10

직접 유압 제어 밸브의 설계 인자에 따른 유동 특성 연구

박하경(Hakyung Park),김진용(Jinyong Kim),나병철(Byungchul Na),이창훈(Changhoon Lee) 한국자동차공학회 2016 한국자동차공학회 부문종합 학술대회 Vol.2016 No.5

판별분석을 이용한 변경모델 결정방법

박하경 ( Hakyung Park ),김상수 ( Sangsoo Kim ),인호 ( Hoh In ) 한국정보처리학회 2007 한국정보처리학회 학술대회논문집 Vol.14 No.1

IT 에 대한 비즈니스 의존성이 증가하면서, 안정된 IT 서비스의 제공과 비용 효과적인 운영의 중요성이 강조되고 있다. ITIL 에서는 효율적이고 신속한 변경 처리를 위해 Service Support 영역에서 변경 관리 프로세스를 제시하고 있다. 하지만 고비용을 요하는 CAB 의 소집 여부 등 의사 결정이 변경 관리자의 자의적인 판단에 의존함으로써, 다른 비즈니스 및 안정된 IT 서비스 제공의 위험요소로 작용하고 있다. 본 논문에서는 이러한 문제점을 해결하기 위하여 요청된 변경 사안이 신중한 검토가 필요한 지 여부를 객관적으로 판단할 수 있도록, 판별분석기법을 적용한 변경 모델 결정 방법을 제안한다. 제안된 모델의 유효성을 검증하기 위해, 실제 운영에 적용된 변경 관리 모델과 제안된 모델을 이용했을 때의 결과를 비교하고 그 결과를 제시하였다. 제안된 방법은 동일한 사안에 대하여 일관성 있는 결정을 도출할 수 있어 프로세스 품질개선에 기여할 수 있으며, 궁극적으로 안정된 IT 서비스 제공에 기여하여 기업성과를 개선할 수 있을 것이다.

판별분석을 통한 ITIL 변경모델 결정 방법

박하경(Ha Kyung Park),김상수(Sang Soo Kim),인호(Hoh Peter In) 한국정보과학회 2007 정보과학회지 Vol.25 No.8

Predictors Associated with the Maintenance of Normal Thyroid Function after Unilateral Total Thyroidectomy in Patients with Papillary Thyroid Microcarcinoma

김지형,박하경,Tae Kwun Ha 대한갑상선-내분비외과학회 2019 The Koreran journal of Endocrine Surgery Vol.19 No.3

Purpose: The goal of this study was to identify factors affecting the maintenance of normal thyroid function in patients who did not receive immediate levothyroxine replacement after unilateral thyroid lobectomy (UTL) for papillary thyroid microcarcinoma (PTMC). Methods: A total of 232 patients were treated for PTMC between January 2015 and December 2017, of whom 40 patients were excluded because of treatment for thyroid disease (n=22) or an inability to maintain normal thyroid function during the preoperative examination (n=18). The remaining 192 patients for whom normal follow-up investigation was possible were then retrospectively analyzed for parameters including sex, age, preoperative free T4, thyroid-stimulating hormone (TSH), thyroglobulin, thyroid autoantibody, body mass index, postoperative histology, and remnant thyroid gland volume. Results: Of the 192 patients included in this study, 97 (50.5%) maintained normal thyroid function without levothyroxine replacement after UTL. The remaining 95 (49.5%) patients developed postoperative hypothyroidism, which was treated with immediate hormonal intervention. Univariate factors associated with postoperative hypothyroidism included sex, postoperative histopathology of the thyroid gland, and the preoperative TSH level. In the multivariate analysis, sex and preoperative TSH levels were identified as significant factors. Conclusion: Female sex and increasing preoperative TSH levels were identified as independent predictors of the development of postoperative hypothyroidism. The cut-off preoperative TSH level for predicting the maintenance of normal thyroid function after UTL was 1.89 mIU/L. Based on these observations, the potential risk of postoperative hypothyroidism in patients exhibiting elevated TSH levels should be discussed before initiating surgery.

유두상 갑상선암에서 최소 갑상선외 침범의 예후인자로서의 유용성

이민재,하태권,박하경,이홍태,신재호,안민성,김광희,배기범,김태현,최창수,김상효,Min Jae Lee,Tae Kwun Ha,Ha Kyoung Park,Hong Tae Lee,Jae Ho Shin,Min Sung An,Kwang Hee Kim,Ki Beom Bae,Tae Hyeon Kim,Chang Soo Choi,and Sang Hyo Kim 대한갑상선-내분비외과학회 2012 The Koreran journal of Endocrine Surgery Vol.12 No.2

Raman Spectroscopy for Optimization of Zn(O, S) buffer layer in CIGS thin film solar cell

고은지,김자영,박하경,김주란,조윌렴,윤석현 한국진공학회 2019 한국진공학회 학술발표회초록집 Vol.2019 No.2