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      • KCI우수등재

        한국소비재 신제품성패의 결정요인 분석

        조남신(Cho Nam Shin),이진주(Lee Jin Joo) 한국경영학회 1980 經營學硏究 Vol.9 No.-

        The modern decision environment is characterized by the presence of multiple objectives or goals, which are generally competing or conflicting. Therfore, it has been well established that virtually every decision making problem involves several key criteria. Mathematical programming techniques based on a single objective criterion such as cost minimization or profit maximization are restricted in application to real-world problems. Radford (14) contended that the goal of a global optimum solution should be discarded when considering complex and multiple objective decision problems. Under the modern complex decision environment, it is necessary to simultaneously consider all of the multiple and often conflicting objectives appropriately in selecting a best strategy or policy. Among the various techniques which have been developed to handle multicriteria decision making problems, goal programming is perhaps the most promising approach as it is an appropriate, powerful, flexible, and pragmatic tool. This technique was originally introduced by Charnes and Cooper (2, 3), and further developed by Ijiri (g) and Lee (11). The goal programming model can be solved through the use of a computer program based on an iterative algorithm. Currently, the most widely used computer program is Lee`s program (11) written in Fortran. Another popular algorithm was developed by Ignizio (7). Lee`s and Ignizio`s programs were designed using the modified simplex method. Lee`s and Ignizio`s programs did not consider efficiency in terms of the running time and storage requirements. Computational inefficiency results from unnecessary information being computed from iteration. to iteration. Recently Arthur (1) attempted to design a more efficient algorithm. This algorithm was tested in comparison with Lee`s algorithm in terms of computational time. Arthur`s goal partitioning algorithm is more efficient than the other two algorithms because it reduces the number of computations by modifying the matrix size when the number of subproblems increases and by eliminating unnecessary nonbasic variables. The critical disadvantage of this algorithm is its inability to provide the final optimal simplex tableau required to perform sensitivity analysis. This paper presents a new efficient GP algorithm based on the product represenation of the revised simplex method in order to overcome deficiencies of computational inefficiency on the part of the Lee and Ignizio algorithms and the lack of the final simplex tableau on the part of the Arthur algorithm.

      • 정량펌프내부 리필밸브의 개폐 간극에서 발생하는 압력강하 해석

        진주석(Joo-Seok Jin),김상우(Sang-Woo Kim),신태석(Tae-Seok Sin),이도형(Do-Hyung Lee) 한국유체기계학회 2008 유체기계 연구개발 발표회 논문집 Vol.2008 No.-

        A three-dimensional numerical analysis was carried out on incompressible flows in the refill valve of check valve type containing ball by using commercial code. A numerical simulation is a useful technique to investigate the physical phenomena of the flow field. This study focused on the flow analysis in the tiny gap between valve body and ball in order to prevent pressure drop of refill valve. Characteristics of complex flows including cavitation effect investigated for different gap's size. when length of tiny gap's size become smaller, speed of fluid is rising rapidly and pressure is on the ebb by Bernoulli's theorem. while the pressure fall off below the saturation vapour pressure, we can saw that happening the cavitation phenomenon in this research.

      • KCI등재

        모폴로지 코너 검출을 이용한 고속 파노라마 비디오 제작 기법

        이정호,이관수,양원근,진주,정동석,Lee Jung-Ho,Lee Kwan-Su,Yang Won-Keun,Jin Joo-Kyung,Jeong Dong-Seok 한국통신학회 2006 한국통신학회논문지 Vol.31 No.4C

        본 논문은 다수의 카메라로부터 입력받은 동영상을 하나의 파노라마 동영상으로 합치는 기법을 제안한다. 서로 인접하면서 겹치는 영상들을 하나의 큰 영상으로 만들어주는 파노라마 영상은 사진 측량법, 위성사진, 컴퓨터 그래픽 등의 분야에서 응용된다. 일반적으로 영상을 모자이크할 때 발생하는 왜곡을 최소화를 위해 투시 변환(perspective transformation)을 사용하는데, 변환 추정에 필요한 특징점을 얻어내는 방법이 결과물의 품질을 결정하게 된다. 본 논문에서는 코너점을 특징점으로 사용했으며, 결과물의 품질이 우수하고 연산 속도가 빠르게 하기 위해 모폴로지 구조를 사용해서 코너점을 추출하였다. 그리고 거의 모든 상황에서 안정적으로 코너점을 검출하기 위해 코너점의 강도를 구분하는 방법을 이용했다. 인접한 영상의 대응점으로부터 추정한 8-변수 투시 변환 값으로 영상 모자이크를 했으며, 결과 영상의 잔상을 제거하기 위해 쌍일차 색상혼합을 적용했다. 실험결과 제안한 방법은 여러 조건에서 빠른 속도와 좋은 화질의 결과를 보였다. This Paper Proposes a method of building a panoramic video from several videos captured from adjacent cameras. The panoramic image which constructed from adjacent and overlapped images is used for photogrammetry, satellite photo or many computer graphic applications. The perspective transformation, which is estimated from the appropriate corresponding pairs of images, can be used to construct the panoramic image without unwarranted distortion and its quality is decided by how to find the features needed for transform estimation. We used the corner points for the corresponding features, and morphological structures were utilized for fast and robust corner detection. We used the criterion of the corner strength, which guarantees the robust detection of the corner in most situations. For the transformation, 8 parameters were estimated from perspective equations which use matched points of adjacent images, and bilinear color blending was used to construct a soapless panoramic video. The experiments showed that the proposed method yields fast results with good quality under various conditions.

      • 버스 통행시간에 미치는 영향 요인 분석

        이진주(LEE, Jin Joo),이영인(LEE, Young Ihn) 대한교통학회 2017 대한교통학회 학술대회지 Vol.76 No.-

        이 연구는 BMS로부터 구득된 정류장 별 출발/도착시각과 교차로 통과시각 자료를 활용하여 정류장 간통행시간의 구성요소 별 변동성을 분석하고, 정시성과 안전을 확보 할 수 있는 적정 통행시간을 산정하는 연구이다. 정류장 간 통행시간은 총 여섯 개의 구성요소로 구분할 수 있으며, 이 중 신호에 의한 통행시간의 변동성이 가장 크게 나타났다. 더하여 정류장의 점유시간의 변동성도 크게 나타났는데, 이는 선행차량의 영향으로 인한 지체에서 기인한 결과이다. 따라서 정시성을 확보하기 위해서는 적정 통행시간 산정 뿐만 아니라 정류장의 설계, 접근 관리 등의 정책을 적극 도입하여야 할 것이다.

      • KCI등재

        파워카드전략 중재가 지적장애아동의 경청하기 기술수행에 미치는 효과

        이진주(Lee, Jin Joo) 단국대학교 특수교육연구소 2017 특수교육논총 Vol.32 No.2

        이 연구에서는 일반초등학교에 재학 중인 특별한 관심영역(SIA)을 가진 3명의 지적장애아동을 한 집단으로 구성하여 각 아동들의 관심영역을 활용한 파워카드 전략 중재가 경청하기 기술수행에 어떠한 영향을 미치는지를 알아보았다. 중재는 지적장애아동 3명을 한 집단으로 구성하여 실시하였으며, 중재효과에 대한 자료 수집은 이야기 듣기 활동 시간에 이루어졌고, 중재 종료 후 유지 검사를 실시하였다. 연구결과는 파워카드 전략 중재를 통하여 대상아동의 경청하기 기술이 향상되었으며, 중재가 종료 후에도 중재효과가 유지되었다. 또한 3명의 대상아동을 한 집단으로 구성하여 파워카드 전략 중재를 실시하는 과정에서 아동들의 관심영역이 확장되고 상호작용이 증가하는 긍정적인 변화가 나타났다. 이 연구는 지적장애아동의 특별한 관심영역(SIA)을 활용하여 동기를 유발시키고, 아동의 요구에 맞춰 스크립트와 파워카드를 제작하여 중재를 실시한 점이 아동들의 흥미를 지속시키는데 긍정적이었다. 또 스크립트와 파워카드를 제작할 때 아동들의 수준에 맞는 문구를 사용하고, 문구에 음률에 넣어 중재를 실시한 점이 아동들에게 목표활동을 상기시키는데 긍정적인 영향을 미쳤다. 자폐스펙트럼장애 아동장애 아동을 대상으로 실시하였던 파워카드 전략 중재를 지적장애아동에게 적용하여 긍정적 결과를 얻었다는 점에서 연구의 의의가 있다. The study on Power Card Intervention is consisted of three Children with Intellectual Disabilities with Special Interest Area in elementary school into one group and examines how Power Card Intervention used interest area of each children affects Listening Skill Performance. Collecting data regarding intervention effect was proceeded during Listening Skill Performance and maintaining test was also proceeded after intervention. Change of interaction between the children was observed during intervention. The results of the study are as follows: First, Three Children with Intellectual Disabilities were improved in Listening Skill Performance after Power Card Intervention. Moreover, intervention effect was maintained after intervention. Second, Interest area of three Children with Intellectual Disabilities was expanded and interaction was also increased. It had positive effect on motivation used Special Interest Area and maintaining interest that script and Power Card produce reflecting needs of the children. In addition, when script and Power Card produce, appropriate words and rhythmic sentence had positive effect on reminder for goal activity. The fact that Power Card Intervention get a positive results applied to Children with Intellectual Disabilities, not Children with Autism Spectrum Disorder is of great significance.

      • KCI등재

        C57BL6 마우스에서 복합생약제인 황금궁의 육모 효과

        진주(Jin Joo Hue),리란(Lan Li),유설혜(Sul Hye Lyu),백인정(In Jeoung Baek),연정민(Jung Min Yon),남상윤(Sang Yoon Nam),윤영원(Young Won Yun),황석연(Seock Yeon Hwang),홍진태(Jin Tae Hong),이범준(Beom Jun Lee) 대한약학회 2005 약학회지 Vol.49 No.6

        Hwanggumgung (HGG) is a hair-care product which is composed of several plant extracts used in oriental medicine. This study was carried out to investigate effect of HGG on hair regrowth in a shaving model of C57BL6 mice. Five-week-old mice were acclimated for 1 week under 23±3℃, 50±10% relative humidity, and 12h of a light/dark cycle before beginning experiment. There were four experimental groups including distilled water (D.W., control), 10% ethanol (EtOH, vehicle control), a positive control of 3% minoxidil (MXD), and HGG for female and male mice, respectively. Six-weeks old mice were trimmed by electric clippers so as not to damage the skin. The next day, mice without visible scraches were selected, randomized and separated in groups of 11 mice. The test compounds were topically treated with 0.15㎖ per mouse per day for 21 days. The hair regrowth was photographically and histologically determined during the experimental period of 21 days. Enzyme activities of γ-glutamyl transpeptidase and alkaline phosphatase were also determined using a rate assay method. There were no clinical signs in all experimental groups. The topical application of 3% MXD and HGG in female mice promoted hair regrowth earlier and faster than the control groups. In male mice, the topical application of 3% MXD and HGG also accelerated hair growth compared with the controls. Ten percent ethanol also promoted hair growth faster than D.W group. The histology of hair growth in experimental groups was strongly associated with the hair regrowth. 3% MXD and HGG promoted elongation of hair follicles compared with the controls in both female and male mice. Activities of alkaline phosphatase and γ-glutamyl transpeptidase, enzymes related to hair growth, significantly increased after treatments of 3% MXD and HGG for 2 weeks in both female and male mice (p<0.05). These results suggest that HGG has hair growth promoting activities and it can be for treatment for alopecia.

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