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김태경,박제선,이주형,윤경구 江原大學校 産業技術硏究所 1998 産業技術硏究 Vol.18 No.-
This study focused on the development of an alternative stress estimation procedure to instantly calculate the critical stresses bonded concrete pavement. Closed form analysis is commonly used to analyze pavement structures. This type of analysis assumes linearelastic material properties and static loading conditions. The well-known ILLI-SLAB finite element program was used for the analysis. Bonded concrete overlay analyzed the stress distribution, behavior and load carrying capacity under track load is made evaluation standard of bonded concrete overlay. In the study, the following results were derived; The properties of strength is that compress and 3-point bending strength of existing pavement is deteriorated with 184 kg/㎠, 59kg/㎠ but compress and splitting tensile strength of overlay is satisfied with 464 kg/㎠, 45kg/㎠. Load transfers is happen at adjacent slab by interlocking under track load. The stress distribution under interior, corner and edge load is described high loading position surrounding then loading position.
멀티미디어 데이타를 위한 DMA 스케쥴링을 포함한 ULS의 설계
허미경,송태섭,이강두 진주여자전문대학 1994 論文集 Vol.17 No.-
Next generation computer will have hardware support for digital "Continuous Media"(CM) such as audio and video. CM applications handle at high rate, with strict timing requirment. To run effienciently such application, an operating system must provide scheduling and IPC mechanism that reflect these needs. We propose that lightweight process to run effienciently mutiple address space, that is, user level scheduling of split-leve scheduling combines DMA scheduling by analysing multimedia data. These mechanism reduce kernel interaction and CPU overhead.
최대근력부하와 폭발적 근력부하에 의한 신경-근피로와 그 회복과정 비교 분석
유관호,이무연,이승훈,김민섭,육조영,임정일,임완기,김대경 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.5
The result which was gained from this study is as follows. From the conclusion of this study it was confirmed that resistant motion at high level strength brings about rise in density of lactate in blood at the same time decline of muscular power and generates acute fatigue of nerve-muscle accompanied by decline in electrical activity of muscle. On the other hand explosive loading produced fatigue at body center and decline in nervine-muscular activity particularly for men, In case of women explosive load did not produce fatigue in the same level as men and they were also quicker in recovery after exercise. Based on 2 types of loading method used in this study there was clearly difference in the process of restoration from resistant motion. For greater decline in muscular power and electromyogram activity more longer period of recovery was require.
남궁문,성수련,이병주,김경태 圓光大學校 1996 論文集 Vol.32 No.2
본 논문은 통행전 정보가 운전자의 경로선택에 미치는 영향을 연구하는데 있으며 통행전정보 제공에 대한 운전자의 경로선택을 분석하기 위하여 선호의식조사를 실시하였다. 통행전 정보로 대체경로에 대한 통행시간 정보를 사용하였으며 운전자의 경로선택행동을 분석하기 위하여 비집계분석모델을 이용하였다. 결과, 운전자의 사회ㆍ경제적 속성과 통행전정보가 운전자의 경로선택에 영향을 미침을 알 수 있다. The main purpose of this paper is to investigate the effects of pre-trip information for drivers' route choice. Stated preference survey is performed to analyze the drivers' route choice for pre-trip information. In this paper, the consuming time for alternative pass is considered as the pre-trip information. Descrete choice analysis is used to model the drivers' route choice behavior. As a result, it shows that social income attribute of the driver and the travel time with pre-trip information affect the drivers' route choice behavior.
박제선,윤경구,이주형,최성용,김태환 강원대학교 부설 석재복합신소재 제품연구센터 1999 석재연 논문집 Vol.4 No.-
최근에 폴리프로필렌 섬유를 첨가하여 콘크리트의 인성을 증가시키고, 균열에 대한 저항성을 향상시키고자 하는 노력이 계속되어 왔다. 그러나 첨가된 섬유의 구조에 대한 이해부족으로 인하여 연구자들간에 실험결과에 대한 해석이 상이한 경우가 많았다. 이러한 연구의 일환으로 섬유의 첨가에 따른 건조수축 균열의 조절 가능성을 분석하기 위하여 섬유의 첨가에 따른 유동성과 건조수축의 변화를 조사하였다. 섬유의 첨가에 따른 유동성의 변화와 건조수축을 측정하기 위한 강제링 시편을 제작하였다. 본 연구에서는 섬유를 첨가한 콘크리트의 역학적 거동특성인 압축강도, 휨강도, 인성, 그리고 균열특성을 실험적으로 규명하고자 하였다. 본 연구는 강도 및 건조수축특성을 규명하기 위하여 수행되었고 섬유의 영향으로 인한 건조수축특성을 예견할 수 있다. Polypropylene Fibers have been used to increase the toughness of concrete and to increase the resistance to crack formation. However, there are many contradictory argument about the effectiveness of the fiber due to the lack of knowledge about the mechanism of fiber in concrete. In order to study the effect of fibers on possible crack control, the effects of fibers on workability and drying shrinkage have been studied. The workability change due to the addition of fibers has been studied, and full size concrete steel ring specimen have been cast at field to investigate the effect of fibers on the shrinkage properties. This laboratory have been performed to obtain the properties of pp fiber reinforced concrete such as compressive, flexural strength, toughness, slump, drying shrinkage crack and drying shrinkage characteristics. The present study was performed clarify the strength and drying shrinkage properties. From these results, we can expect the effect of the admixtures of polypropylene fiber for concrete and mortar about strength and drying shrinkage properties.
서정길,김종수,김용태,이경식,한성현 한국공작기계학회 2004 한국공작기계학회 춘계학술대회논문집 Vol.2004 No.-
In this paper, we developed a Windows XP version off-line programming system which can simulate a track vehicle model in 3D graphics space. The track vehicle was adopted as an objective model. The interface between users and the off-line program system in the Windows XP's graphic user interface environment was also studied. The developing language is Microsoft Visual C++. Graphic libraries, OpenGL, by Silicon Graphics, Inc. were utilized for 3D Graphics.
Lee, Hae-Young,Choi, Bong-Hwan,Lee, Jung-Sim,Jang, Gul-Won,Lee, Kyung-Tai,Chung, Ho-Young,Jeon, Jin-Tea,Cho, Byung-Wook,Lee, Jun-Heon,Kim, Tae-Hun Asian Australasian Association of Animal Productio 2007 Animal Bioscience Vol.20 No.5
AMP-activated protein kinase alpha 2 (PRKAA2) plays a key role in regulation of fatty acid and cholesterol metabolism. This study investigated the porcine PRKAA2 gene as a positional candidate for intramuscular fat and backfat thickness traits in pig chromosome 6. A partial fragment of the porcine PRKAA2 gene, amplified by PCR, contained a putative intron 3 including a part of exon 3 and 4, comparable with that of human PRKAA2 gene. Within the fragment, several single nucleotide polymorphisms were identified using multiple sequence alignments. Of these, TaqI restriction enzyme polymorphism was used for genotyping various pig breeds including Korean reference family. Using linkage and physical mapping, the porcine PRKAA2 gene was mapped in the region between microsatellite markers SW1881 and SW1680 on chromosome 6. Allele frequencies were quite different among pig breeds. The full length cDNA of the porcine PRKAA2 (2,145 bp) obtained by RACE containing 1,656 bp open reading frame of deduced 552 amino acids, had sequence identities with PRKAA2 of human (98.2%), rat (97.8%), and mouse (97.5%). These results suggested that the porcine PRKAA2 is a positional candidate gene for fat deposition trait at near telomeric region of the long arm of SSC 6.
Integration of 4.5' Active Matrix Organic Light-emitting Display with Organic Transistors
Lee, Sang-Yun,Koo, Bon-Won,Jeong, Eun-Jeong,Lee, Eun-Kyung,Kim, Sang-Yeol,Kim, Jung-Woo,Lee, Ho-Nyeon,Ko, Ick-Hwan,Lee, Young-Gu,Chun, Young-Tea,Park, Jun-Yong,Lee, Sung-Hoon,Song, In-Sung,Seo, O-Gweo The Korean Infomation Display Society 2006 Journal of information display Vol.7 No.4
We developed a 4.5" 192${\times}$64 active matrix organic light-emitting diode display on a glass using organic thin-film transistor (OTFT) switching-arrays with two transistors and a capacitor in each sub-pixel. The OTFTs has bottom contact structure with a unique gate insulator and pentacene for the active layer. The width and length of the switching OTFT is 800${\mu}m$ and lO${\mu}m$ respectively and the driving OTFT has 1200${\mu}m$ channel width with the same channel length. On/off ratio, mobility, on-current of switching OTFT and on-current of driving OTFT were $10^6,0.3{\sim}0.5$ $cm^2$/V·sec, order of 10 ${\mu}A$ and over 100 ${\mu}A$, respectively. AMOLEDs composed of the OTFT switching arrays and OLEDs made using vacuum deposition method were fabricated and driven to make moving images, successfully.
낙동강에서 유기오염 및 SS 농도 변화에 따른 DOC 농도 변화의 특성
이규열 ( Kyu Yeol Lee ),김주언 ( Ju Eon Kim ),이권철 ( Kwon Chul Lee ),이경락 ( Kyung Lak Lee ),이인정 ( In Jung Lee ),임태효 ( Tea Hyo Im ) 한국물환경학회 2013 한국물환경학회지 Vol.29 No.4
Temporal increase of SS induces concentrations in various forms of organic matter including BOD, COD, TOC. Consequently, it causes hard to identify sources of water pollution during or after precipitation. The objective of this study is to investigate variations of DOC concentration caused by increase of flow and changes of external factors in river by comparing to SS concentration. In results, monitoring sites (e.g., Banbyeonchen) consisting of hard riverbed showed high correlation between SS and organic matters, except BOD. On the contrary, other sites (e.g., Naesungcheon) where riverbed consists of sand were found in a wide range of annual fluctuation in SS level, whereas these sites showed a narrow range in annual DOC fluctuation. In Gumhogang and Namgang, a lower correlation between SS and other factors was found most likely because of high concentration in organic matter. However, lower annual fluctuation values of DOC were observed in comparison to those of COD and TOC. Similar results were also confirmed in main river sites, Sangju and Mulgeum. In conclusion, DOC concentration is better indicator for monitoring organic matter which cannot be provided by BOD, COD, TOC in the Nakdong river basin.