Modified Paik–Mansour formula for ultimate strength calculations of ship hulls

Paik, J.K.,Kim, D.K.,Park, D.H.,Kim, H.B.,Mansour, A.E.,Caldwell, J.B. Taylor Francis 2013 SHIPS AND OFFSHORE STRUCTURES Vol.8 No.3

보강판의 트리핑에 관한 연구

백점기,이원호 釜山大學校生産技術硏究所 1997 生産技術硏究所論文集 Vol.52 No.-

본 연구의 목적은 보강재의 트리핑의 특성을 수치적으로 조사하고 보강재웨브의 국부좌굴강도를 예측하기 위한 설계식의 정도를 검증하는데 있다. 또한 비선형 유한요소법을 이용하여 보강재의 트리핑과 보강재간 패널의 국부좌굴의 상관효과 및 판과 보강재의 접합선에서 탄소성 회전구속의 영향등을 조사하는 것이다. 기존의 유한요소법은 구조물의 비선형해석을 수행함에 있어서 상당한 컴퓨터계산을 요하지만, 본 연구에서는 보강판의 비선형거동을 보다 효율적으로 계산하기 위하여 간이화된 비선형유한요소법을 적용하였다. 압축력을 받는 flat-bar형 보강재가 붙은 보강판에 대하여 탄소성대변형 유한요소해석을 판과 보강재웨브의 치수를 변화시켜 가면서 시리즈해석을 수행하여, 그 결과를 바탕으로 flat-bar형 보강재의 트리핑에 대한 기본적인 조사를 수행하였다. 또한, 본 연구에서는 보강재웨브의 임계 좌굴강도를 예측하기 위한 2개의 설계식 즉, IACS설계식과 Paik등이 개발한 간이식을 이용한 이론해와 유한요소해석 결과를 비교함으로써 그 정도를 검증하였다. The twin aims of the present study are to numerically investigate the characteristics of tripping failure of flat-bar stiffened panels subject to uniaxial compressive loads and also to study the accuracy of two available design formulations. A special purpose nonlinear finite element method capable of efficiently analyzing the elasto-plastic large deformation behavior of stiffened panels is developed and used in the study. A benefit of the application of the nonlinear finite element method is that it makes possible a rigorous accounting of the interacting effects of stiffener tripping and plating collapse and also the inclusion of the influence of elasto-plastic rotational restraints at the plate-stiffener intersection prior to and during failure. A parametric series of elasto-plastic large deformation analyses for stiffened panels with flat-bar type of stiffeners under uniaxial compressive loads are carried out varying member proportions and structural parameters. Based on the computed results, a basic investigation of tripping behavior of flat-bars is made, and the accuracy of design formulations is studied.

스포츠생리학 : Creatine 투여가 쇼트트랙 스피드 스케이팅 선수의 운동 수행력과 혈중 피로 요인에 미치는 영향

백일영(Paik11-Young),우진희(WooJin-Hee),채지훈(ChaefJi-Hoon) 한국체육학회 2000 한국체육학회지 Vol.39 No.2

The purpose of this study was to examine the effect of oral creatine supplementation on exercise performance, and to follow the changes of blood fatigue elements, such as lactate, ammonia, inorganic phosphate, pH & 5-HT. All of the tests were performed on a international standard arena ice rink. The subject of present study was divided into two groups; 500m skaters(500-AT), and 3,000m skaters (3,000-AT). Each skaters participated in their own skating distances(500 and 3,000m). After the preliminary test, all subjects were given a 5-day supplementation of Creatine monohydrate at a rate of 20g·d^-1. When the study was performed, we could not find a significant difference in developing a record by Cr supplementation(p>.05). However, as the rank of skating is determined by hundreds of second, we could find a result, which can change the rank of the skating competition by the Cr supplementation. There were significant differences in mean blood lactate between Cr supplementation and Cr non-supplementation for the 500-AT and the 3,000-AT groups(p< .05). Also, there were big significant differences in mean blood inorganic phosphate and ammonia concentrations between Cr supplementation and Cr non-supplementation for the 500-AT and the 3,000-AT groups(p < .05). The mean blood pH in Cr supplementation experimental condition was higher than Cr non-supplementation experimental condition, but we could not find a significant differences in mean blood pH between Cr supplementation and Cr non-supplementation for the 500-AT and the 3,000-AT groups(p >.05). Blood 5-HT concentrations in Cr supplementation experimental condition was higher than non supplementation experimental condition, and there were significant differences between Cr supplementation and Cr non-supplementation for the 500-AT and the 3,000-AT groups.(p<.05). However, it was difficult to explain that 5-HT occurs fatigue unless the physiological mechanism of 5-HT was provided. Therefore, this study concluded that Cr supplementation had a ergogenic effect on energy metabolism. Especially, in a high intensive exercise as short-track skating, Cr supplementation will help for fatigue elements reduction and exercise performance improvement. Also, we believe the additional research of 5-HT must be accomplished so that we can provide the scientific evidence of fatigue, which was cause by 5-HT.

Recognition of Pet Heart Failure Using Dual-stream Convolutional Neural Network

lae-Hyun Paik十,Jun-Young Oh+, Euijong Lee, and Ji-Hoon Jeong 충북대학교 컴퓨터 정보통신 연구소 2022 컴퓨터정보통신연구 Vol.30 No.2

본문 참고

내국신용장의 전자화에 관한 연구

서백현 한라대학교 2007 論文集 Vol.10 No.-

전자내국신용장 이용과정에 대한 적정 모델과 보완해야할 과제를 고찰하였다. 요약하여 무역금융 취급세칙의 개정이 필요하다. 내국신용장거래는 사실상 무역금융 취급세칙이 사실상 신용장통일규칙을 상당부분 대체하고 있으므로 무역금융취급세칙은 eUCP의 주요 내용을 반영하여 개정하는 것이 바람직할 것이다. 다음으로 내국신용장거래의 형식을 양도가능, 선급내국신용장의 형태로 다양화하여 내국신용장의 효용을 제고시키는 것이 바람직하며, 전자내국신용장 유통시스템개발과정에서 이러한 점을 반영하여야할 것이다. 그리고 전체 거래과정을 완전 전자화하기 위해서 일치성 검토를 위한 엔진을 장착할 필요가 있으며 또한 중소기업의 이용을 촉진시키기 위해서 저비용으로 참여할 수 있는 전자내국신용장 유통시스템을 개발하고 교육지원과 같은 체계적인 프로그램이 필요하다고 하겠다.

日本의 「家元制度」가 傳統保全에 미친 影響硏究 : 1984學年度 敎授硏究費 受惠論文

金白峰 경희대학교 체육대학 한국체육과학연구소 1984 體育學論文集 Vol.12 No.-

This thesis, centering on Japanese IEMOTO and IEMOTO SYSTEM, is dealing with what kind of mental continuity and spirit of art created modern traditional art, with making a balance between the preservation and creation of one artistic connection. For the purpose of this study, 1 tried to observe the way of accomplishing art and trace the foundation which have supported the spirit of art. And also I tried to reveal the logical foundation, which has been called the ideal form of the spirit of art, emphasizing the matrix of motion and at the same time developing beyond that matrix of motion. Finally, I made a general survey of the function and system of IEMOTO and IEMOTO SYSTEM which have contributed to the preservation and development of the traditional art in spite of the recent mammonistic trend of art and also tried to induce from this survey the various methods of the establishment and development of Korean traditional art. I proposed following contents to deal with above mentioned study. ● Preface ● The main subject. 1. Way of accomplishment to art and IEMOTO SYSTEM 2. Manner of accomplishment to art and it’s value. 3. The reality and falsity of IEMOTO SYSTEM. 4. The exact position of the idea of Matrix of Motion. ● Conclusion.

떨어진 코끝의 코성형술 : 분류 및 교정 Classification & Correction

이백권,송진경,이종원,안상태,오영환 大韓成形外科學會 2004 Archives of Plastic Surgery Vol.31 No.2

측뇌실로 파열된 중대뇌동맥 진균성 동맥류 1예

금동인,백지현,조성옥 대한신경외과학회 1977 Journal of Korean neurosurgical society Vol.6 No.2

Approximately 4% of cerebral aneurysms are of mycotic origin. The desination of "mycotic" for arterial lesions of infectious origin was provided by Osier in 1885, and. The relationship of mycotic aneurysms in any location to bacterial endocarditis was made clear by the review of Stengel and Wolferth in 1923. Mycotic aneurysms are abnormalities of the vessel wall resulting from infacted emboli, most commonly arising from the heart as a part of the spectrum of bacterial endocarditis. The middle cerebral artery is most commonly involved, including its proximal division which is a common site for congenital aneurysms also. Recently we experienced a case of middle cerebral mycotic anenrysm ruptured into the lateral ventricle and sucessful removal of the hematoma after clipping of the aneurysm. The patient was discharged uneventhly in mild left hemiplegias we discussed with a brief review of the literature.

産業場의 氣中鉛濃度에 關한 調査

李匡默,白南園 최신의학사 1969 最新醫學 Vol.12 No.2

A study on lead concentration in air of industrial establishments in Korea. Kwang Mook Lee, Nam Won Palk (Dept. of Preventive Medicine, Catholic Medical College) <Profewor Kyu Sang Cho) Lead is a substance among the earliest metals used by men. It, having low melting point, can be refined easily and it is so soft that it can be easily rolled into sheet and foil and extruded cold rods, pipes and tube containers. Alloyed with tin, antimony and other metals, lead proved the most satisfactory substance for using in industry. The importance of lead and its compounds in industry, taken in relation to its physiological effects, is such that the degree of industrial exposure is of great hygienic significance. By our previous report, it was assumed that six percent of the industrial workers as a whole were exposed to lead fume and dust in their work places in Korea. In this survey, we measured lead concentration in air of work places sampled from eight different industries: storage battery manufacturing, printing, earthenware manufacturing, lead refining, electrical machinery, automobile manufacturing, petroleum refining and lead mining industry. The resultsare as follows: 1) The average concentrations of lead in air of lead refining industry show 0.64C.81 mg/m3, 0.31~0.66mg/m3 in storage battery industry, 0.21mg/m3 in cable covering process in electrical machinery industry. The concentrations are higher than the threshold limit value. Those of automobile manufacturing, printing and earthenware manufacturing industries are below the threshold limit value. 2) In petroleum refining industry where organic lead is used, the concentration of lead in air at the process to add tetraethyl lead to petroleum shows 0.065mg/m3. But there is a risk that cause lead poisoning in that process though the concentration is below the threshold limit value, for the organic lead can be absorbed through the intact skin. 3) None of the satisfactory control measures to prevent lead exposure has been found, such as local ventilation, automation, and protection of workers with personal protective devices, even in the industries which show higher concentration of lead in their work places. It seems that the ignorance of both employers and employees concerning the health hazards of lead workers and their control measures causes the defenceless against the lead exposure.

성인의 천미추부 종괴

조길환,이백권,장도명,김영진,안상태 大韓成形外科學會 1999 Archives of Plastic Surgery Vol.26 No.3

We developed an animal model to recreate the condition of an open fracture in communication with the maxillary sinus. We then studied wound healing of the sinus wall structures following fracture in the presence of autogenous bone and alloplastic implant. This model is designed to simulate the repair of an orbital floor fracture in humans. The New Zealand White rabbit was used as the animal model. Standardized 8mm defects were made bilaterally in the maxillary sinuses to include bone and mucosa in 36 rabbits. Two different implants and autogenous calvarial bone graft were placed in the soft-tissue pockets to obturate the defects, exposing one surface of the implant to the open sinus. Medpor porous polyethylene, silicone and calvarial bone implant were compared. Animals were killed at 1, 2 and 8 weeks after implantation. Gross examination of the specimens for the amount of mucosal closure and implant tissue fixation was performed. Histological sections were evaluated for bone and soft-tissue morphology juxtaposed to the implant. Complete closure of the mucosal defect was demonstrated with each type of implant. Medpor implants showed both vascular and soft-tissue ingrowth into pores by week 1. Bone ingrowth was seen by week 2. Closure of the Medpor obturated defects occurred more rapidly than in the silicone group. The Medpor implants and calvarial bone demonstrated bone and soft-tissue fixation, callus formation and maturation, while mature overlying mucosa was reconstituted over the defects. Silicone implants demonstrated a fibrous tissue reaction within 1 week of implantation and they never became fixed to bone or soft tissue. Maxillary sinus wall regeneration occurred in all defects. This study supports clinical observations of maxillary sinus wall regeneration in humans. Although sacrococcygeal mass is rare and usually found in infants or children, adolescent or adult patients with protruding mass in sacrococcygeal region occasionally come to us simply for a cosmetic problem. In this situation, even though there is no definite neurological deficit, it should be evaluated whether or not the underlying bony pathology or dural defect exists. Few cases about the sacrococcygeal mass have been reported in adults. We reviewed our cases including preoperative evaluation methods and postoperative diagnosis. From March, 1993 to February, 1997, we experienced 6 adult patients with sacrococcygeal mass and no neurological abnormality. Preoperative evaluation were made by plain X-ray, myelogram, computed tomography(CT), and magnetic resonance imaging (MRI), as needed. Postoperative diagnoses were 2 meningoceles, 2 lipomyelomeningoceles, 1 desmoid tumor, and 1 teratoma. From our experiences, CT or MRI is essential to evaluate the sacrococcygeal mass preoperatively. These methods can visualize the precise anatomic location and extent of the mass, its relation to the spinal cord, and associated bony abnormalities. MRI is superior to CT, especially in defining the nature of the mass and involvement of the spinal cord. Conclusively, even a simple mass in the sacrococcygeal region in adults needs MRI or CT evaluation, and MRI is the most valuable method of evaluating the mass preoperatively and provides important information to establish a treatment plan.