IT 투자 평가를 위한 시스템 다이나믹스를 활용한 밸런스스코어카드

백승원(Sung-won Baek),주정은(Jung-eun Ju),구상회(Sang-hoe Koo) 한국지능정보시스템학회 2008 지능정보연구 Vol.14 No.1

IT는 도입 비용이 상당히 높고, 단기간에 그 성과가 나타나지 않는다. 하지만 대부분의 IT 도입 성과 평가 모델은 단기간의 성과만을 측정하기 때문에 신뢰성 있는 예측을 하기 힘들다. 또한 성과 측정을 위해 ROI와 같은 재무적인 요소만을 고려하는 경우가 대부분이다. 보다 정확한 성과 측정을 위해서는 재무적 요소뿐 아니라 시스템 활용성, 고객만족, 기업 이미지 등 비재무적인 요소도 고려하여야 한다. 본 연구에서는 장기적인 관점에서 재무적인 요소와 비재무적인 요소 모두를 성과 측정에 반영할 수 있는 방법을 제안한다. 이를 위하여 본 연구에서는 시스템 다이나믹스와 균형성과표(Balanced scorecard)의 연구 성과를 활용하였다. 시스템 다이나믹스는 장기적인 관점에서 대상 시스템의 행태를 분석하는데 유용하며, BSC는 재무적 비재무적 측면에 관한 평가를 가능하게 해 준다. 또한 본 연구의 유용성을 입증하기 위하여, 본 연구 결과를 유통 산업에 있어서 RFID 도입 성과를 측정하는데 적용해 보았다. 적용해 본 결과 RFID는 도입 비용이 많이 들기에 단기적인 관점에서는 부정적인 결과를 가져오나, 장기적인 관점에서는 기업에 이익을 주는 것을 확인할 수 있었다. IT investment is usually very costly and takes a long time to get the results out of investment. However, most of currently available evaluation methods for IT investment are based upon short-term effects, hence their results are not fully trustworthy. In addition, those methods commonly consider only financial aspects such as ROI. For more reliable evaluation, it is necessary to consider non-financial factors such as system utilization, customer satisfaction, public relations, and so on, as well as financial factors. In this research, we propose an evaluation method that can evaluate both financial and non-financial aspects on a long-term base. For this purpose, we employed the research results developed in System dynamics and Balanced scorecard. System dynamics is useful in analyzing long term behavior of a given system, and Balanced scorecard is useful for evaluating both financial and non-financial aspects. We demonstrated the usefulness of our method by applying it to the evaluation of RFID (Radio Frequency Identification) investment in a distribution and retail industry. From this application, we found that RFID investment may not be rewarding in the short term, but is sure to be returning the income relative to its investment in the long run.

벤치마킹을 통한 국내 노후 교통시설물 자산관리 전략 도출

백승원(Baek, Seung Won),윤성민(Yun, Sung Min),유민경(Yoo, Min Kyung),박찬영(Park, Chan Young),한승헌(Han, Seung Heon) 대한토목학회 2020 대한토목학회 학술대회 Vol.2020 No.10

저온 열원을 이용한 흡착식 냉방 시스템의 실증 평가

우성민(Sung Min Woo),손성필(Seong Pil Son),이수용(Su Yong LEE),김광영(Kwang Young Kim),김효상(Hyo Sang Kim),홍주화(Ju Hwa Hong),백승원(Seung Won Baek) 대한기계학회 2020 대한기계학회 춘추학술대회 Vol.2020 No.12

In this paper, the demonstration experiment for adsorption system using LOW Temp Heat Source is experimentally studied. In order to use wasted low temp heat source, adsorption system is designed. In addition, the system uses water as a refrigerant, which is more environmentally friendly and simpler in structure than other refrigeration systems.A 35kW class system is designed and made in the present study. According to the results of the cooling demonstration test, it can be confirmed that the system can be used in an actual environment.

공단밀집지역에 위치한 일개 응급의료센터에 내원한 급성산업중독환자에 대한 분석

신준현,문성우,백승원,임성익,윤영훈,이성우,홍윤식,Shin, Jun-Hyun,Moon, Sung-Woo,Baek, Seung-Won,Lim, Sung-Ik,Yoon, Young-Hun,Lee, Sung-Woo,Hong, Yun-Sik 대한임상독성학회 2008 대한임상독성학회지 Vol.6 No.2

Purpose: Surveys on poisoning usually involves intoxication rather than inhalation, skin contact, etc. Therefore, we examined the characteristics of patients who visited the emergency department in an industrial complex after acute industrial exposure to toxic materials. Methods: Medical records of patients exposed to toxic materials in the work places from April, 2006, to March, 2008, were analyzed retrospectively. Inhalation patients due to fire were excluded. Results: Subjects included 66 patients, with a mean age of $35.4{\pm}10.9$ years, mostly men (91%). Toxicity occurred in 51 patients (77%) by contact, 15 patients (23%) by inhalation, and none by oral ingestion. For toxic materials, 10 patients were exposed to hydrofluoric acid, 8 to hydrochloric acid, 7 to sodium hydroxide, 7 to metals, and others. The face and hands were the most frequent exposure site by contact. Most exposures were caused by accidents, with 29 cases (42%) exposed because of carelessness or not wearing protective equipment. Most complaints were pain on exposure site, but 7 of the inhalation patients complained of dyspnea. The majority of patients with contact exposure were discharged after wound care or observation. After inhalation exposure, 1 patient died and 5 patients were admitted to the intensive care unit. Conclusion: Major causes of workplace exposure were not wearing protective equipment or carelessness. Although contact exposures are usually benign, cautious observation and management are required in patients with inhalation exposure.

유전적 소인을 고려한 농식품 소비와 질병과의 상관성 분석

김동욱(Dong-Wook Kim),백승원(Baek Seung Won),김성준(Kim Sung Jun) 한국콘텐츠학회 2021 한국콘텐츠학회 종합학술대회 논문집 Vol.2021 No.8

턱관절장애에 대한 수기요법의 체계적 문헌 고찰과 메타분석

김홍국,유덕우,정성목,김성진,백승원,이창희,윤진영,Kim, Hong-Guk,Ryoo, Dek-Woo,Jeong, Seong-Mok,Kim, Sung-Jin,Baek, Seung-Won,Lee, Chang-Hee,Yoon, Jin-Young 척추신경추나의학회 2017 척추신경추나의학회지 Vol.12 No.1

Objectives: To evaluate and summarize the efficacy and safety of manual therapy in temporomandibular disorder(TMD). Methods: Ten databases (Pubmed, Cochrane, EMBASE, AMED, CINAHL, CNKI, and four Korean databases) were searched up to March 2017. Pain and range of motion(ROM) of temporomandibular joint were used as the primary outcome measure, and effective rates, dysfunction scale and adverse events were used as secondary outcome measures. The Cochrane risk of bias tool was used to evaluate the methodological quality. Results: 10 randomized controlled trials(RCTs) involving 603 participants were included. There were no significant differences between the two groups in comparison with placebo manual therapy group. In comparison with Wait-list and conventional treatment groups, manual therapy significantly alleviated pain and ROM. Five RCTs(50.0%) reported adverse events and there were no adverse cases by manual therapy. Conclusions: We found evidence that manual therapy may alleviate symptoms of patients with TMD. A positive effect was observed in comparison with conventional treatment and Wait-list, but no conclusion for the comparisons with placebo manual therapy. There is no evidence of worsening symptoms or causing adverse events.

복부 둔상 및 유강장기 손상에 있어서 초기 나선형 복부전산화 단층촬영의 진단적 가치

조영덕 ( Young Duck Cho ),홍윤식 ( Yun Sik Hong ),이성우 ( Sung Woo Lee ),최성혁 ( Sung Hyuk Choi ),윤영훈 ( Young Hoon Yoon ),임성익 ( Sung Ik Lim ),장익진 ( Ik Jin Jang ),백승원 ( Seung Won Baek ) 대한외상학회 2008 大韓外傷學會誌 Vol.21 No.1

Purpose: This study was conducted to examine the clinical significance IV-contrasted helical abdomen computed tomography (CT) as a diagnostic screening tool to evaluate hollow viscus injury in blunt abdominal trauma patients. Methods: This is a retrospective study encompassing 108 patients, presenting to Korea University Medical Center (KUMC) Emergency Department (ED) from January 2007 to December 2007, with an initial CT finding suggestive of intra-abdominal injury. An initial non-enhanced abdomen CT was taken, followed by an enhanced CT with intravenous contrast. Patients` demographic data, as well as the mechanisms of injury, were inquired upon and obtained, initial diagnosis, as dictated by specialized radiologists, were added to post-operational (post-OP) findings and to additional CT findings acquired during their hospital stays, and all were combined to arrive at final diagnosis. Initial CT findings were further compared with the final diagnosis, yielding values for sensitivity, specificity, and accuracy, as well as positive and negative predictive values. Patients were further divided into two groups, namely, those that underwent operational intervention and those that did not. The initial CT findings of each group were subsequently compared and analyzed. Results: Initial CT scans revealed abnormal findings in a total of 212 cases - solid organ injuries being the most common finding, as was observed in 97 cases. Free fluid accumulation was evident in another 69 cases. Based on the CT findings, 77 cases (71.3%) were initially diagnosed as having a solid organ injury, 20 cases (18.5%) as having a combined (solid organ + hollow viscus) injury, and 11 cases (10.2%), as having an isolated hollow viscus injury. The final diagnosis however, were somewhat different, with only 67 cases (62.0%) attributed to solid organ injury, 31 cases (28.7%) to combined injury (solid + hollow), and 10 cases (9.3%) to hollow viscus injury. The sensitivity (CI 95%) of the initial helical CT in diagnosing hollow viscus injury was 75.6%, and its specificity was 100%. The accuracy in diagnosing hollow viscus injury was also meaningfully lower compared to that in diagnosis of solid organ injury. Among patients initially diagnosed with solid organ injuries, 10 patients (2 from follow-up CT and 8 from post-OP finding) turned out to have combined injuries. A total of 38 patients underwent an operation, and the proportion of initial CT findings suggesting free air, mesenteric hematoma or bowel wall thickening turned out to be significantly higher in the operation group. Conclusion: Abdominal CT was a meaningful screening test for hollow viscus injury, but the sensitivity of abdominal CT was significantly lower in detecting hollow viscus injury as compared to solid organ injury. This calls for special consideration and careful observation by the ED physicians when dealing with cases of blunt abdominal trauma.