• 해양환경안전학회지
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• 제18권5호
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• pp.388-397
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• 2012

본 연구에서는 3차원수치파동수조에 규칙파뿐만 아니라 안정적인 불규칙파가 조파될 수 있는 새로운 조파시스템 3D-NIT(3-Dimensional Numerical Irregular wave Tank)모델을 제안한다. 그의 타당성을 검증하기 위하여 1) 조파지점에서 계산파형과 목표파형을 비교 검토하고, 2) 경사수심역에 설치된 호안구조물을 대상으로 산정된 기존 월파량에 대한 실험치와 비교 검토하며, 3) 연직원주 구조물에 작용하는 파력 및 구조물에 의한 파랑변형의 해석에 적용하여 기존의 수치 및 수리실험결과와 비교한다. 이상의 결과를 기초로 3D-NIT모델을 경사수심역에 설치된 원주구조물에 작용하는 쇄파력의 해석에 적용하여 입사파고, 구조물의 이격거리 등에 따른 작용쇄파력의 특성을 규명하고, 더불어 국내현장의 특수방파제에 적용하여 반사율, 월파량 등을 검토하였다. 그 결과 본 연구에서 제안하는 3D-NIT모델을 이용한 수치실험결과는 기존의 수리모형실험을 잘 재현하고 있음을 확인하였고 복잡한 형상을 갖는 해안구조물의 해석에 적용할 수 있음이 확인되었다.

• Geomechanics and Engineering
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• 제28권3호
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• pp.299-311
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• 2022

Water-resisting key stratum (WKS) between coal seams is an important barrier that prevents water inrush from goaf in roof under multi-seam mining. The occurrence of water inrush can be evaluated effectively by analyzing the fracture of WKS in multi-seam mining. A "long beam" water inrush mechanical model was established using the multi-seam mining of No. 2+3 and No. 8 coal seams in Xiqu Mine as the research basis. The model comprehensively considers the pressure from goaf, the gravity of overburden rock, the gravity of accumulated water, and the constraint conditions. The stress distribution expression of the WKS was obtained under different mining distances in No. 8 coal seam. The criterion of breakage at any point of the WKS was obtained by introducing linear Mohr strength theory. By using the mechanical model, the fracture of the WKS in Xiqu Mine was examined and its breaking position was calculated. And the risk of water inrush was also evaluated. Moreover, breaking process of the WKS was reproduced with Flac3D numerical software, and was analyzed with on-site microseismic monitoring data. The results showed that when the coal face of No. 8 coal seam in Xiqu Mine advances to about 80 m ~ 100 m, the WKS is stretched and broken at the position of 60 m ~ 70 m away from the open-off cut, increasing the risk of water inrush from goaf in roof. This finding matched the result of microseismic analysis, confirming the reliability of the water inrush mechanical model. This study therefore provides a theoretical basis for the prevention of water inrush from goaf in roof in Xiqu Mine. It also provides a method for evaluating and monitoring water inrush from goaf in roof.

• 한국간호교육학회지
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• 제7권2호
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• pp.196-206
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• 2001

The purpose of this study was to identify Korean adolescents' sexual harassment conditions and patterns in schools as well as their psychological reactions when they are under sexual harassments or they committed sexual harassments. The subjects were 475 middle and high schoolers in Pusan and Gyeong Sang Nam-Do. The survey was executed from July 1 through Dec. 31, 2000. The collected data was analyzed by SPSS WIN 8.0 using percentage, mean. The results of this study were as follows: 1. the linguistic sexual harassment such as 'lewd jokes or dirty talks' was the major pattern(35.4%), The body touching such as 'kiss or embracing', 'internet transmission of pornography', 'sexual harassing of body characteristics', touching breast', 'grasping of hands or body touching', 'body touching in secret place', 'urging to sit in touch or on knees', 'exposing of special body areas', and 'showing pornography' followed in a row. 2. The eighteen point three percents of subjects had the experience to commit sexual harassment. The forty four point seven percent of above subjects committed it against their classmates. The first time to commit sexual harassment was their middle school period (38.4%). Their motives to commit it were as under: 'killing time'(48.8%), 'annoying', 'attracting attention from the other sex', 'expressing lovely emotions', 'urging of their friends', 'misunderstanding that the other partners felt good when they experienced sexual harassment, 'showing their strength' etc. their with committing harassments they felt as under ; 'joyful'(61.6%), 'funny,' 'desirous to try again', 'thrilling', 'breaking stress', very pleasant', 'exciting', 'regretful', 'guilty', and 'feeling fear' etc. 3. Twenty four point two percents of the population exposed to sexual harassments. The sexual harassers were almost their classmates (42.7%). And then unknown people', 'boy or girl friends and school staffs' followed in a row. The places where harassments happened were 'inside classroom'(69.8%), 'school bus and subway', 'outside school', etc. The feelings when experienced harassments were 'anger' (51.3%), 'hurting self-respect', 'embarrassing', 'rejection', 'insulting', 'shame', 'fear', 'dislike', 'anxiety', 'melancholy' etc. The reasons not to have consultations after sexual harassments were 'worrying to be well-known'(49.6%), 'believing not helpful enough', 'regarding simple mischief', 'trying to revenge directly', 'understanding their mistakes', 'worrying retaliation' etc.

• 해양환경안전학회지
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• 제24권2호
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• pp.140-145
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• 2018

본 연구는 두점식 선박 계류시스템의 종방향 외력에 대한 비선형 동적거동 해석을 수행하였다. 특정 입력 매개변수에 대한 카오스 운동과 한계주기궤도 등의 비선형 거동의 특성을 연구하였다. 주로 비선형복원력은 계류시스템의 강한 비선형성과 동적거동의 다양성을 제공한다. 계의 운동방정식 시뮬레이션에 사용된 수치 적분기는 4차 룽게쿠타법이다. 외력진폭과 주파수를 변화시킬 때 분기 그림과 동적불안정 현상들을 볼 수 있다. 외력의 주파수(진동수)가 0.4 rad/s인 경우 수많은 혼돈상태 점들 사이에 주기창이라 불리는 안정적인 주기해가 관측된다. 주파수가 0.7 rad/s인 경우는 외력진폭이 1.0을 초과할 때 혼돈 영역이 갑자기 증가한다. 주파수가 1.0 rad/s인 경우는 주파수가 0.4 rad/s 및 0.7 rad/s인 경우와 비교해 볼 때, 혼돈 운동이 약화된다. 아울러, 두점식 계류시스템은 각 매개변수에서 준주기 운동, 한계주기궤도, 대칭성의 깨짐과 같은 다양한 정상상태의 궤적이 관측된다.

• International Journal of Internet, Broadcasting and Communication
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• 제14권3호
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• pp.115-130
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• 2022

Barrage is an interactive method based on video, and the video itself is visualized from the viewer's point of view to play people's emotions, and it already has an advantage in communication by attracting people's attention using stories and plays. Advances in digital and mobile technology have enabled video viewing anytime, anywhere. Due to the nature of the barrage site that relies on the same video content or playback to participate in video sharing through computers or mobile clients, a barrage that can express users' feelings and thoughts will be added, breaking down the limit of content acceptance by a single user. Barrage satisfy users' entertainment needs, and their influence is growing. Gradually, they are heading to offline movie theaters and TV from barrage videos on the Internet. Attempts to function as offline ammunition facilitated technological innovation for media convergence by converging mobile media with PCs and screens. At the same time, the trend of media convergence shown by coal screens is also a trend of overall technological development. A barrage is an extension of human communication skills. The properties of the barrage fit well with the need for experiential marketing (via video). It can provide a visual experience and create an atmosphere of "surrounding and watching" and eliminate loneliness. Barrage itself provides a function to comment on videos, which is a trigger point for the reason, and donation adds to the amount of information in the video, adding to the fun of the video. Through the barrage, sarcastic, teasing, and expressing emotions can bring entertainment experiences, and users can produce and communicate their shooting text while consuming the satisfaction brought by the shooting. At the same time, Barrage attaches great importance to the needs of the masses, is more individual and diversified, and has commercial significance in line with the current development trend of the Internet. As a new interactive method, barrage contains huge potential value. However, the impact of the interactive way of barrage should also be viewed from a dialectical point of view, how to solve the difficulties in the development of barrage. The way to solve the difficulties in the development of barrage is worth studying. This research will analyze the reasons for the development of barrage and the analysis of Chinese barrage websites, the case analysis of barrage videos, the exploration of the characteristics and values of barrage, and the problems in the process of barrage communication. Provide reference for the development of industrial culture.

• 한국실내디자인학회논문집
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• 제23권6호
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• pp.51-59
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• 2014

Rem Koolhaas has pursued new architectural approaches breaking with conventional ones. Around the 1990s when large-scale projects occurred with the union of Europe ahead, Koolhaas recognized the limits to the existing methods for responding to such changes. Accordingly, he came to use design methods based on 'congestion' and 'void' as strategical alternatives, which became the moment for him to leap forward from the previous working sphere based in Europe to becoming an architect who would be commissioned a number of large-scale global projects. Therefore, this study intends to investigate his design methods which utilized congestion and void, and to derive spatial characteristics from the projects based on such methods. First of all, the study looked into the historical background, definition and process of congestion and the void as design methods, and analyzed his projects to which such methods were applied by classifying them into the following categories: 1) the void that removes a space of singularity; 2) the void that penetrates space while making a flow; and 3) the void that is formed by vertical extrusion. Then, the characteristics of architectural spaces made in this way were identified as 1)the single-body appearance made by congestion and the following types of space made by the void: 2) the non-uniformly shaped space that looks like floating; 3) the flexible space with various flows and directions; and 4) the space with virtual possibilities that embrace contingent events. This understanding of Rem Koolhaas's design methods which were attempted in various ways at his critical turning point will be the foundation to understand the overall world of his works.

• Asian-Australasian Journal of Animal Sciences
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• 제16권2호
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• pp.269-276
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• 2003

We studied the gel properties of porcine collagen with microbial transglutaminase (MTGase) as a catalyst. A creep meter was used to measure the mechanical properties of gel. The results showed samples with high concentration of MTGase gelled faster than those with a low concentration of MTGase. The gel strength increased with incubation time and the peaks of breaking strength for 0.1, 0.2 and 0.5% MTGase were obtained at 40, 20 and 10 min incubation time, respectively. According to SDS-PAGE, the MTGase was successfully created a collagen polymer with an increase in molecular weight, whereas no change in formation was shown without MTGase. The sample with 0.5% MTGase began to polymerize after 10 or 20 min incubation at $50^{\circ}C$, and complete polymerization occurred after 40-60 min incubation. Scanning electron microscopic analysis revealed that the gel of porcine collagen in the presence of MTGase produced an extremely well cross-linked network. The differential scanning calorimetric analysis showed the peak thermal transition of porcine collagen gel was at $36^{\circ}C$, and that with MTGase no peak was detected during heating from 20 to $120^{\circ}C$. The melting point of porcine collagen gel could be controlled by MTGase concentration, incubation temperature and protein concentration. Knowledge of the structural and physicochemical properties of porcine collagen gel catalyzed with MTGase could facilitate their use in food products.

• 디자인학연구
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• 제11권2호
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• pp.105-114
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• 1998

20세기초 전통적인 타이포그래피의 양식의 틀을 깨고 획기적인 타이포그래피의 표현양식을 창출한 선구적인 타이포그래퍼 들은 기욤 아폴리네르와 필리포 말네티의 작품들은 같은 시대의 같은 문화적 배경에서 태어난 타이포그래피 라고 할지라도 시각적 관점과 표현 유형의 차이가 있음에도 불구하고 그간의 연구들을 통해 볼 때, 동일한 유형, 즉‘회화적 타이포’,‘표현주의 적 타이포’로 간주되어져 왔다. 따라서 아폴리네르와 마리네티의 타이포그래피의 형성 배경과 작품을 비교, 분석하여 현대 타이포그래피 형상에 끼친 영향과 의의를 재조명해 보았다. 구상적 표현과 추상적 표현이라는 큰 차이점 이외에도 타이포그래피 표현 소재와 표현방법, 지면구성, 구문의 파괴, 문장의 해체 여부에서도 특징을 발견하였으며, 1900년대 중반과 후반에 걸쳐 구상적 표현에는 브래버리 탐슨과 허브 루발린으로 추상적 표현에는 피에트 츠바르트와 네빌 브로디로 확실히 구분되어 이어지고 있음을 발견할 수 있었다.

• 한국해안·해양공학회논문집
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• 제23권1호
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• pp.70-78
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• 2011

2009년 8월 13일과 15일, 부산 해운대 해수욕장 앞 해상에서 이안류가 발생하였다. 또한, 올 여름인 2010년 7월 29일과 30일에도 이안류가 발생하여 피서객 들이 조난된 사고가 발생하였다. 해수욕객들은 전원 구조되어 인명 피해는 발생하지 않았지만 최근 이안류 발생이 너무 잦아져 이에 대한 원인파악과 대책마련이 시급한 실정이다. 본 논문에서는 파랑모형과 조류가 결합된 해빈류 모형을 기본으로 튜브거동까지 재현되는 사용자 편의를 위하여 GUI로 개발된 HAECUM 모형(HAEundae CUrrent Model)을 이용, 해운대 해수욕장의 이안류 발생 수치모의를 실시하였다.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2003년도 학술대회지
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• pp.164-170
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• 2003

우리나라의 건설산업은 건설시장 개방으로 외국기업과의 경쟁체제 돌입이 불가피하고, 건설정책과 각종 행정규제의 급변으로 대웅전략 수립이 불가피하고, 건설정책과 각종 행정규제의 급변으로 대웅전략 수립이 곤란한 반면, 건설 수요자의 요구는 정차 다양화, 고급화 되어가고 있으나, 건설정보의 통합관리체제의 부재와 건설통합시스템의 미구축, 그리고 정보 공유와 공공정보 공개 마인드의 미성숙으로 인하여 적극적인 대처가 불가능한 실정이다. 그러므로 건설계획에서 설계, 시공, 관리유지에 이르기까기 건설 전 단계에서 발생하는 각종 정보를 통합하여 데이터 베이스 즉, ERP를 구축하고, 각종 건설정보를 공유할 수 있는 환경을 제공할 수 있는 건설통합시스템 ERP구축과 건설 CALS의 구현만이 유일한 대안이다. 따라서 건설산업의 정보화실태를 분석하고 건설CALS체제에 의한 건설통합정보시스템 ERP구축 모델을 제시한다.