Slope Based Intelligent 3D Disaster Simulation Using Physics Engine

Kim, Joo-Chang,Jung, Hoill,Kim, Sungho,Chung, Kyungyong Kluwer Academic Publishers 2016 WIRELESS PERSONAL COMMUNICATIONS Vol. No.

<P>In the modern society, the forms of disasters are getting larger and more diverse by abnormal weather phenomena due to rapid social changes. As human and economic damage is increasing by these disasters, interest in disaster observation and prevention is increasing and studies have been carried out in various fields. In order to minimize disaster damage, National Disaster Information Center provides disaster-related information such as disaster situations, risk index, local situation and so on. At present, however, various descriptive studies on action tips in the event of a disaster, disaster alert, disaster communications network have been in progress but there are few studies on prediction or simulation for preventing disasters etc. Therefore, this paper proposes a slope-based intelligent 3D disaster simulation using a physics engine. The proposed method is to infer a variety of disaster situations that may occur in reality through ontology and apply it to 3D simulation. Disaster situation ontology constitutes context information of outside, inside, disasters etc. and generates rule bases using Jena 2.0 inference engine. Inference results are derived in the form of XML and applicable to a variety of devices. The expression of 3D simulation virtual space is divided into interior and exterior. Interior constitutes the index information based on actually measured terrain and then expresses it into 3D compound type terrain data. Exterior expresses six planes into a hexahedron by using Sky Box technique. Simulation operates object collision, movement, surroundings etc. in real time by using a physics engine and represents a disaster situation in 3D virtual space by using particles function. Based on ontology based context awareness, environment context information on slope, including landslides, snow, rain, fogs, fire, explosion, and smoke, is developed into the slope based intelligent 3D disaster simulation. As a result, depending on geomorphic characteristics, disaster management service can realistically and visually be offered to users in 3D virtual reality. In addition, it is possible to experimentally apply disaster situations virtually through 3D virtual reality, and thereby judge their potential risk.</P>

신정부 과학기술정책 방향 모색

홍성주(Sung Joo Hong),이다은(Da Eun Lee),홍창의(Chang Ui Hong),강민지(Min Ji Kang),우청원(Chung Won Woo),강홍렬,전찬미 과학기술정책연구원 2017 정책연구 Vol.- No.-

With the presidential election in 2017 as a momentum, many people in science and engineering and social organizations gave various science and technology policy proposals. Most of them were reflected in each party’s election pledges. The media also covered lots of science and technology policy issues, which mainly included agendas reflecting the voices of the fields of R&D like research autonomy and people-oriented investment. This task aims to understand how the landscape of science and technology policies changed in an era of political change. To achieve this, we pursued to answer three research questions. First, how are we going to look at the vitalization of science and technology policy issues that occurred in the presidential election and its results? Second, what was it like in the past? Did the previous governments faithfully carry out their science and technology pledges in their science and technology policies? Third, what is the blind spot of policies that failed to attract attention or became a dilemma despite the change in science and technology policies? In order to answer these questions, the research team analyzed the way of establishing the window for science and technology policies during the presidential election in 2017, while also looked at the path taken for science and technology pledges to be implemented as policies during the past 15 years after the Rho Moo Hyun Government. The analysis results showed that we need to take largely four different approaches to science and technology issues. From the medium and long term perspective, it can be divided into issues that need access, issues that need enhancement, issues that need to gain political interests and issues that need to improve rationality. The research team’s results presented important perspective and methodology of looking at science and technology policy by not only being applied as a standard and means, but also provided a framework for devising various methods and means by policy issue. Hopefully, our researches are helpful in the planning and implementation of science and technology policy by the new government, which will be inaugurated in May 2017.

Association Between Gut Regulatory Hormones and Post-operative Weight Loss Following Gastrectomy in Patients With Gastric Cancer

Hye-Kyung Jung,Chung Hyun Tae,Hye Ah Lee,Ko Eun Lee,Chang Mo Moon,Seong Eun Kim,Ju Young Seoh,Joo-Ho Lee 대한소화기 기능성질환·운동학회 2022 Journal of Neurogastroenterology and Motility (JNM Vol.28 No.3

Background/AimsPost-operative weight loss in patients with gastric cancer lead to a poor quality of life and long-term survival. This study aims to evaluate the effects of gut regulatory hormones on post-operative weight loss in patients with subtotal gastrectomy for gastric cancer. MethodsThis prospective study was conducted for 12 months post-surgery in 14 controls and 13 gastrectomy patients who underwent subtotal gastrectomy for gastric cancer. Serum plasma ghrelin, glucagon-like peptide-1, gastric inhibitory peptide-1, peptide YY, insulin, and homeostatic model assessment for insulin resistance responses to a standardized test meal were recorded at multiple time points before and after gastrectomy at 4 and 12 months. ResultsThe mean weight difference between the pre-operative state and the 4-month period was significantly reduced to 6.6 kg (P = 0.032), but significant weight reduction was not observed from 4 months to 12 months. The plasma levels of glucagon-like peptide-1, gastric inhibitory peptide-1, and peptide YY were significantly increased 4 months postoperatively compared to the pre-operative state (all P = 0.035); however, pre-operative levels and relative changes over a period of 0-4 months of hormones were not correlated with body weight changes. Only the pre-operative ghrelin at peak had a negative correlation with changes in weight reduction in the 4 months after surgery (ρ = −0.8, P = 0.024). ConclusionsSignificant weight reduction was common after subtotal gastrectomy for gastric cancer with a negative correlation pre-operative plasma ghrelin levels. Incretin hormones are modestly but significantly increased after subtotal gastrectomy; however, these changes did not affect the weight changes.

자궁비대가 있는 여성에서의 질식자궁적출술

정철권 ( Chul Gwon Chung ),주장오 ( Jang Oh Joo ),김창운 ( Chang Woon Kim ),엄상탁 ( Sang Tak Eum ),박경도 ( Kyung Do Park ) 대한산부인과학회 2004 Obstetrics & Gynecology Science Vol.47 No.6

목적 : 본 연구의 목적은 질식자궁적출술을 시행함에 있어 자궁무게와 수술성적간의 관계를 평가함으로서 자궁비대가 있는 여성에서의 질식자궁적출술의 안전성과 효율성을 밝히고자 함에 있다. 연구 방법 : 2001년 2월부터 2003년 11월까지 본원에서 질식자궁적출술을 시행한 170명의 환자들을 자궁 무게가 300 gm에서 1000 gm 사이인 40명 (Group I)과 자궁무게가 300 gm 미만인 130명 (GroupsII)으로 나누어 분류하여, 각각 의무 기록지를 통해 연령, 분만력, 자궁무게, 수술기왕력, 동반수술, 수술 후 입원기간, 출혈량, 수술 전 후 헤모글로빈 변화, 수술시간, 합병증을 비교분석 하였다. 결과 : 임상적 분석의 결과 두 집단간의 연령, 분만력, 수술기왕력, 수술 후 입원기간, 동반수술, 출혈량, 수술 전 후 헤모글로빈 변화 비교에서는 유의한 차이가 없었으며, 수술 합병증 발생률의 비교에서도 Group I에서 12.5%, GroupII에서 13.1%로 유의한 차이는 없었다 (p=.660). 수술시간의 비교에서는 Group Ido서 GroupII에서 보다 평균 16분 가량 수술시간이 더 소요되었으나 통계학적 유의성은 없는 것으로 나타났다 (Group I 78.4±27.1분; GroupII 62.9±22.7분) (p=.176). 결론 : 자궁무게가 300 gm과 1000 gm 사이로 자궁비대가 있는 여성에서의 질식자궁적출술은 자궁무게가 300 gm 미만인 경우와 비교하여 안정성 및 효율성에 차이가 없었으며, 자궁비대가 질식자궁적출술의 금기증이 되지 않으며, 자궁세절술 (morcellation)을 능숙하게 사용함으로서 수술시간을 줄일 수 있을 뿐 아니라 더욱 안전하게 질식자궁적출술을 시행할 수 있을 거라 사료된다. Objective : The purpose of this study was to evaluate the relationship between uterine size and surgical outcomes in women undergoing total vaginal hysterectomy. Methods : We revieres the medical records of the 170 patients who underwent total vaginal hysterectomy from February 2001 to November 2003. These patients were stratified into two groups; Group I, patients with uterine weight of between 300 gm to 1000 gm; GroupII, patients with uterine weight of <300 gm. The two groups were compared for ages, parity, uterine weight, previous abdominal operations, concurrent surgical procedures, postoperative discharge day, bleeding amount, perioperative hemoglobin concentration change and operative time. Results : 1. There were no significant difference between the two groups with respect to postoperative discharge day, concurrent surgical procedures, bleeding amount and perioperative hemoglobin concentration change. 2. The rate of surgical complications were similar in the two group (Group I 12.5%; GroupII 1301%) (p=.660). 3. Operative time for vaginal hysterectomy was slightly longer for women in Group I than Group II (Group I 78.4±27.1 minutes; GroupII 62.9±22.7 minutes) (p=.176), but the difference between the two groups in operative time was not statistically significant. Conclusion : The vaginal hysterectomy is as safe and effective for the woman with enlarged uterus (300-100 gm) as for the woman with uterine weight of <300 gm. Uterine enlargement (Uterine weight>300 gm) is not an absolute contraindication to vaginal hystrectomy.

속박 (束縛) 과 침수 (浸水) 로 유도된 흰쥐의 스트레스성 급성 (急性) 위점막병변 (胃粘膜病變) 발생에 있어서 위산분비의 (胃酸分泌) 역할

민영일(Young Il Min),박충기(Choong Kee Park),장린(Rin Chang),김병호(Byung Ho Kim),장영운(Young Woon Chang),이정일(Jung Il Lee),박승준(Seung Joon Park),정주호(Joo Ho chung),정지창(Jee Chang Jung) 대한소화기학회 1989 대한소화기학회지 Vol.21 No.1

N/A The possible roles of gastric acid secretion in the pathogenesis of stress ulcers induced by restraint with water-immersion for 7 hours in pylorus-ligated rats were investigated. Control rats with pylorus-ligation only did not show any gastric mucosa} lesion, and their mean gastric acid output was 449.2 ± 36.1 umol/rat. In contrast, the stressed rats, group II, showed multiple, punctate and hemorrhagic erosions in gastric mucosa, and mean gastric acid output was decreased to the level of 253.7 ± 27.3 umol/rat. Subcutaneous administration of histamine(40 mg/kg every 2.5 h for a total three times) to stressed rats augmented the lesion with severe multiple, linear and hemorrhagic erosions and mean acid output increased significantly (328.1 ± 31.5 umol/, p<0.005) compared with group II. Pretreatment with rantidine(20 mg/kg) or prostaglandin E2 (30 ug/kg) before exposure to stress reduced gastric lesion formation slightly with no significance. In ranitidine pretreated rats, mean gastric acid output was decreased significantly (120.1 ± 15.3 umol/rat, p<0.005) compared with group II. However, in prostaglandin pretreated rats, mean gastric acid output showed no significant changes. Therefore, it is suggested that increased gastric acid secretion seems to be an aggravating or a permissive factor rather than a major factor in the pathogenesis of stress-induced gastric mucosal lesions.

CdIn₂S₄단결성 박막 성장과 광발광 특성

정헌상,최창주 조선대학교 에너지.자원신기술연구소 2002 에너지·자원신기술연구소 논문지 Vol.24 No.2

A stoichiometric mixture of evaporating materials for CdIn₂S₄single crystal thin films was prepared from horizontal furnace To obtain the single crystal thin films. CdIn₂S₄mixed crystal was deposited on thoroughly etched semi-insulating GaAs(100) substrate by hot wall epitaxy(HWE) system. The source and substrate temperatures were 630℃ and 420℃, respectively. The crystalline structure of single crystal thin films was investigated by the photoluminescence and double crystal X-ray diffraction(DCXD). The carrier density and mobility of CdIn₂S₄single crystal thin films measured from Hall effect by van der Pauw method are 9.01×1^(16)cm^(-3) and 219 ㎠/V·s at 293 K, respectively. From the optical absorption measurement, the temperature dependence of energy band gap on CdIn₂S₄single crystal thin films was found to be E_(g)(T) = 2.7116 eV - (7.74 × 10^(-4) eV) T²/(T+434). After the as-grown CdIn₂S₄single crystal thin films was annealed in Cd-, S-, and In-atmospheres, the origin of point defects of CdIn₂S₄ single crystal thin films has been investigated by the photoluminescence(PL) at 10 K. The native defects of VCd, VS, Cdint, and Sint obtained by PL measurements were classified as a donors or acceptors type. And we concluded that the heat-treatment in the S-atmosphere converted CdIn₂S₄single crystal thin films to an optical p-type. Also, we confirmed that In in CdIn₂S₄/GaAs did not form the native defects because In in CdIn₂S₄single crystal thin films existed in the form of stable bonds.

안면신경 마비 환자에 있어서의 측두근 및 근막피판을 이용한 안면근 기능 회복 증례보고

정창주,권혁도,엄인웅,우승철,민승기,정호용 大韓顎顔面成形再建外科學會 1994 Maxillofacial Plastic Reconstructive Surgery Vol.16 No.1

Generally, the totally paralyzed face can never be made normal by any of the current methods of reconstruction. Careful selection of patients based on sound judgment of what can and cannot be achieved by the proposed surgical technique is paramount to a successful operation and a satisfied patient. The results are related to time of delayed between injury and repair : the shorter the delay the better are the results. The objectives in correcting facial paralysis are to achieve normal appearance at rest ; symmetry with voluntary motion ; control of the ocular, oral, and nasal sphincter; symmetry with involuntary emotion and controlled balance when expressing when expressing emotion ; and no significant functional deficit secondary to the reconstructive surgery. It must be employed a number of concepts, for treatment of the paralyzed face by surgeon, depending on the cause, time interval, and wound characteristics, as well as the availability of and necessity for neuromuscular substitution. Nerve grafts, crossovers, muscle transfers, free muscle and nerve-muscle grafts, micronuerovascular muscle transfers, and regional muscle transpostion are the principal methods being developed. We applied the tmporal musle transposition for reanimation of unilatrally paralyzed faces for long times on two patients. The results of muscle transposition can be enhanced by the patient's learning to activate the transposed muscle by voluntary effort, and are best in patients who are motivated to learn the necessary motor-sensory coordination techniques.

상악 결손부 수복을 위한 측두피판의 이용

정창주,진국범,이동근,윤성필,김귀희,김영조 大韓顎顔面成形再建外科學會 1994 Maxillofacial Plastic Reconstructive Surgery Vol.16 No.1

The functional deformity following removal of the maxilla is considerable, especially following maxilla cancer excision. Rehabilitation of oral and maxillofacial region used to be very difficult with prosthesis or traditional flaps. Temporal muscle and fascia flaps have been described for immediate reconstruction following hemi-maxillectomy, but not total maxillectomy. The muscle and superficial fascia of the temporal area differ in their physical characteristics, vascular supply and clinical applications. Both can be employed independently or simultaneously as regional flaps in the reconstruction of a variety of complex craniofacial defects. Four case is presented in which 3 case maxilla cancer, one case non-union after maxilla fracture, and all case showed successful use of this flap. Only one patient developed partial necrosis of the flap ; significant necrosis did not occur in any other patient. This present paper reviews the anatomy, surgical technique and utilisation of temporal muscle and fascia flaps.

한국인 직무 스트레스 측정도구의 개발 및 표준화

장세진,고상백,강동묵,김성아,강명근,이철갑,정진주,조정진,손미아,채창호,김정원,김정일,김형수,노상철,박재범,우종민,김수영,김정연,하미나,박정선,이경용,김형렬,공정옥,김인아,김정수,박준호,현숙정,손동국 大韓産業醫學會 2005 대한직업환경의학회지 Vol.17 No.4

Background and Purposes: Over the past three decades, numerous studies performed in Korea have reported that job stress is a determinant risk factor for chronic diseases and work disability. Every society has its own culture and occupational climate particular to their organizations, and hence experiences different occupational stress. An occupational stress measurement tool therefore needs to be developed to estimate it objectively. The purpose of this study is to develop and standardize the Korean Occupational Stress Scale (KOSS) which is considered to be unique and specific occupational stressors in Korean employees. Subjects and Methods: Data were obtained from the National Study for Development and Standardization of Occupational Stress (NSDSOS Project: 2002-2004). A total of 12,631 employees from a nationwide sample proportional to the Korean Standard Industrial Classification and the Korean Standard Occupational Classification were administered. The KOSS was developed for 2 years (2002-2004). In the first year, we collected 255 items from the most popular job stress measurement tools such as JCQ, ERI, NIOSH and OSI, and 44 items derived from the a qualitative study (depth interview). Forty-three items of KOSS, in the second year, were retained for use in the final version of the KOSS by using Delphi and factor analysis. Items were scored using conventional 1-2-3-4 Likert scores for the response categories. Results: We developed eight subscales by using factor analysis and validation process: physical environment (3 items), job demand (8 items), insufficient job control (5 items), interpersonal conflict (4 items), job insecurity (6 items), organizational system (7 items), lack of reward (6 items), and occupational climate (4 items). Together they explained 50.0% of total variance. Internal consistency alpha scores were ranged from 0.51 to 0.82. Twenty-four items of the short form of the KOSS (KOSS-SF) were also developed to estimate job stress in the work setting. Because the levels of the subscales of occupational stress were gender dependent, gender-specific standard norms for both the 43-item full version and the 24-item short form using a quartile for the subscales of KOSS were presented. Conclusion: The results of this study suggest that KOSS might be an appropriate measurement scale to estimate occupational stress of Korean employees. Further and more detailed study needs to be conducted to improve the validity of this scale.

土中施液機의 開發에 關한 연구

鄭昌柱,鄭夏禹 서울大學校 農科大學 1977 서울대농학연구지 Vol.2 No.1

This study was undertaken to develop a new subsoil liquid injector applicable to a muddy soil and to compare with that developed by the International Rice Research Institute. To improve the mobility and operational stability, three different pilot liquid injectors were designed and manufactured. These were the single-rotation-disk-float type, double-rotating-disk type, and double-rotating-disk-float type, which are shown in Photo 2 through 4. According to the comparative tests, it was shown that the single-rotating-disk-float type and double-rotating-disk type did not have a enough flotation, which resulted in the decreased mobility. The double-rotation-disk-float type may be in practical use because of its best performance on mobitity and operational stability compared to the other types developed and the float type developed by the IRRI.