통일논단 : 남북한의 짝체계 모형 -분단에서 통일로 가는 가교

장기웅 평화문제연구소 1988 통일한국 Vol.53 No.-

메타버스 사용경험에 따른 메타버스 정보시스템의 사용의도에 관한 연구 : 중소기업의 도입 중심으로

장기웅,이상준,박재성 (사)디지털산업정보학회 2024 디지털산업정보학회논문지 Vol.20 No.2

The demand for metaverse is increasing rapidly due to the development of 3D information technology and the pandemic situation caused by COVID-19. Small and medium-sized enterprises(SMEs) are also in increasing demand for metaverse in the community, meetings, and customer services of their employees. Based on the UTAUT model, this study investigated the acceptance of the Metaverse-type information system(IS) by employees of SMEs. Using the responses from 170 SMEs employees, we conducted the regression analyses SMEs employees’ usage intention on Metaverse-type IS. The results of the research analyses were as follows. First, among the variables of the UTAUT model, performance expectations, social influence, and promotion conditions had a significant effect on the intention to use. Second, among the variables derived from the industrial specificity of Metaverse-type IS, only individual innovation had a significant influence on the intention to use. Last but not least, in the relationship between the intention to use Metaverse-type IS and the influencing factors, only individual innovation was significant in the moderating effect according to past metaverse use experience.

과학사적 수업을 통한 낙하운동 관련 오인 변화에 관한 연구

장기웅,오희균 全南大學校 師範大學 科學敎育硏究所 1998 科學敎育硏究誌 Vol.22 No.1

In the field of sCIence education, there is a tendency to introduce history of science into school lessons as a way to the effective teaching of science and a new direction of science education. This study aims at the effective way of correcting the misconceptions related to falling movement by investigating the development stages of scientific conceptions through lessons on history of science. To achieve this object, with use of "The inquiry and answer method" the misconceptions of students' on the weight and speed of falling matter, falling movement in vacuum, direction of motion and force direction, change in velocity and force in the gravity field have been investigated before the lesson has been performed. The traditional model of lesson(TL) and the model based on the science history(SHL) have been developed and applied to misconceptions mentioned above. The results of · the two models have been compared and analyzed to find out the effective way to overcome the misconceptions. Data were collected from 128 high school students in first and second grades. The results of this study are as follows, First, students have following misconceptions as follows, ① The heavier an object is, the faster it falls down. ② Gravity has nq effect on the motion in the vacuum, ③ Object moves in the same direction of force. ④ Force is in proportional to the speed of an object. ⑤ Force is transferred to the object form the applier and remains in the object. ⑥ Object needs a lasting force to maintain movement. ⑦ No force is being applied to an object at rest. Seconds, misconceptions of the students are very similar to those appeared on the development stages of concepts in the history of science. Third, SHL is much more effective than TL for the positive change In misconceptions about the falling movement. That is, in the rate of change In positive conception on each item, the former is higher than the latter by 4.5% to 45.1%. Fourth, many ~tudents responded informally . thi,l.t the{'fe,lt much . interested and excited to find out that the thoughts similar to their own also discussed on the developmental stage of science history. Fifth, lesson on science history is rather effective in correcting the misconceptions by letting students to realize how their opinions on particular concepts were criticized and revised in the history of science. In SHL students compare their concepts . with those appeared , qn the development stage of history of science. The concepts in the history of science may be similar or dissimilar with the students' own concepts. Through the comparing activities students correct their misconceptions. Therefore, SHL is more effective in correcting the misconceptions than TL without those activities. Sixth, the science education can be carried out more effectively when students take part in the lesson actively and eagerly. SHL reflects more positively the students' activities than the teacher- oriented TL does, resulting in effective change in the misconceptions of students.

大邱地下鐵計劃의 現況과 問題點

張基雄 慶北大學校 經營大學院 1992 最高經營者課程 論文集 Vol.- No.15

단군전승(檀君傳承)의 비교신화학적(比較神話學的) 고찰(考察)

장기웅 조선대학교 인문학연구원 2001 인문학연구 Vol.25 No.-

제27차 학술대회 : 19. 상부위장관출혈의 임상적 고찰

장기웅,서정언,홍순덕,최광임 대한외과학회 1975 대한외과학회 학술대회자료집 Vol.- No.-

Prognostic Factors in Terms of the Number of Metastatic Nodules in Patients With Colorectal Cancer Liver Metastases

장기웅,김찬욱,김기훈,임석병,유창식,김태원,김표년,김종훈,김진천 대한대장항문학회 2016 Annals of Coloproctolgy Vol.32 No.3

Purpose: The hepatic resection is the gold-standard treatment for patients with colorectal-cancer liver metastases (CLM). This study aimed to identify prognostic factors in patients with synchronous CLM who underwent a surgical curative (R0) resection with respect to the number of metastatic nodules. Methods: Of 1,261 CLM patients treated between January 1991 and December 2010, 339 who underwent a R0 resection for synchronous CLM were included in this retrospective analysis. Patients were grouped according to the number of CLM nodules: 1–2 CLM nodules, n = 272 (group 1) and 3–8 CLM nodules, n = 67 (group 2). Results: The 5-year progression-free survival (PFS) rate in group 1was better than that in group 2 (P = 0.020). The multivariate analysis identified lymph-node metastasis (N2), lymphovascular invasion (LVI), and three or more CLM nodules as independent poor prognostic factors for PFS in all patients and lymph-node metastasis (N2) and LVI as independent poor prognostic factors for patients in group 1. No independent prognostic factors were identified for patients in group 2. CLM treatment method and neoadjuvant chemotherapy were not associated with survival. Conclusion: Three or more metastatic nodules, lymph-node metastasis (N2), and LVI were independent poor prognostic factors for PFS in patients with synchronous CLM who underwent a R0 resection. The latter 2 factors were also independent prognostic factors for PFS in patients with less than 3 CLM nodules; however, in patients with three or more CLM nodules, the prognosis for PFS may be related only to liver metastasis.

속빈 연속 슬래브교의 거동

곽계환,장기웅 圓光大學校 1996 論文集 Vol.31 No.2

본 연구는 속빈 연속 슬래브교의 실제거동에 근접하는 합리적인 격자해석모델(grillage analysis model)을 구성하고 이방성(orthotropic)과 등방성(isotropic)에 대한 거동특성을 비교, 분석함과 아울러 사하중, 활하중 및 온도하중 등의 설계하중에 대해 구조해석방법을 제시하고자 한다. 이를 위해 본 연구에서는 속빈 연속 슬래브교의 구조거동을 잘 표현함과 동시에 해석하는데 시간과 노력이 비교적 적게 드는 격자망을 구성하기 위해 교축방향과 교축직각방향의 부재수가 각기 다른 세가지의 격자모델에 대해 해석을 실시하고, 각각의 모델에 대해 이방성과 등방성에 단면상수를 적용하여 그 결과 비교 분석한다. 그리고 실제교량에 대해 현장에서의 정적 및 동적재하시험을 실시한 후 그 시험결과와 해석결과를 비교함으로써 격자모델의 타당성을 입증하고 합리적인 격자망을 제시한다. The aim this paper is to present a reasonable grillage model for approximately analysis actual behavior of a voided slab bridge and to compare two geometrical properties of isotropic and orthotropic in the bridge deck. In this study, three models were prepared and analyzed to form the grillage mesh relevant to the voided slab continuous bridge. The grillage mesh was consisted of the longitudinal beams and the transverse beams equivalent to the prototype slab stiffness. By applying the different section properties of isotropic and orthotropic slab to each model, the difference of the resultant force was compared and studied. The loading tests in field were carried out to evaluate the static and dynamic behavior of a existing voided slab bridge. The results from the tests have been compared with it analyzed with the grillage model. Finally, it is concluded that the total number of logitudinal members should be less B(slab width)/1.5, spacing of transverse members should be about L(span length)/2.5.

응급환자 병원내 이송중의 모니터링을 위한 저전력형 휴대용 무선 ECG 시스템 개발

장기웅(Kee-Woong Jang),김지원(Ji-Won Kim),공세진(Se-Jin Kong),김철승(Chul-Seung Kim),엄광문(Gwang-Moon Eom) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7

It is desirable to monitor the vital signals, such as ECG, of a emergency patient during transfer in the hospital as well as in the ambulance. The purpose of this study is to develop a system which provides a real-time and wireless ECG to the medical staff nearby patient during transfer in hospital. In this context, we developed a low-power, low-cost and portable ECG system consisting of 1) ECG measurement and RF transmission module and 2) RF receiving and LCD display module. The developed system is expected to be useful in monitoring ECG of a patient during transfer in the hospital.

항만건설을 위한 케이슨 들고리의 안전성에 관한 연구

곽계환,장기웅,김종효,Kwak, Kae Hwan,Jang, Ki Woong,Kim, Jong Hyo 한국강구조학회 1998 韓國鋼構造學會 論文集 Vol.10 No.1

본 논문은 케이슨의 인양작업중 Fitting Anchor의 취성파괴로 인한 들고리의 붕괴원인을 조사하기 위한 실험적 연구이다. 또한, 본 연구에서는 응력해석을 통하여 들고리의 붕괴메카니즘을 분석하고 이를 실제 붕괴과정과 비교한다. 본 연구에서는 파괴된 강재에 대한 파면해석 뿐만아니라 화학성분시험, 인장시험 및 샤르피 V-노치 충격시험을 실시한다. 그리고 이의 시험 결과를 정상적인 강재에 대한 시험결과와 비교한다. 본 연구의 거시적, 미시적인 방법으로 결함을 관찰한 결과, Fitting Anchor 내부에 원주방향으로 나타난 표면결함은 케이슨의 진수시 발생하는 들고리의 인장응력이 작용하기 전에 발생한 것임을 확인할 수 있었다. 이는 균열선단의 응력집중이 발생하여 작용응력보다 큰 응력이 결함에 발생한 것임을 알 수 있다. 또한, 잠재한 결함의 크기가 임계값 이상으로 증가하여 본 연구대상 강재의 응력확대계수가 증가하였을 것으로 판단된다. 그래서 균열선단의 응력확대계수가 본 강재의 파괴인성보다 크게 되어 케이슨의 인양작업중에 취성파괴를 일으킨 것으로 사료된다. 본 연구결과에 따르면 케이슨 들고리의 붕괴는 Fitting Anchor의 취성파괴로 발생한 것으로 사료된다. This paper describes an experimental study to examine collapse causes of the lifting cable due to brittle failure of an fitting anchor under the lifting works. Also, in this study an collapse mechanism that was obtained from stress analysis was compared with an actual collapse procedure. Fractographical analysis as well as chemical component test, tension test and Charpy V-Notch impact test for the fractured steel members were carried out. And then, its results were compared with that of normal steel members. Circumferential surface flaws were developed at internal facets of the fitting anchor before tensile stress occurred. Hence, a higher stress than nominal stress was occurred at flaws by stress concentration at the crack tip. Also, stress intensity factor of members increased by crack size of the potential flaws. Because the stress intensity factor at the crack tip was greater than critical values(fracture toughness), brittle fracture occurred under the lifting works. It is judged that the main collapse of the lifting cable is due to brittle fracture of the fitting anchor.