• Journal of the Institute of Electronics Engineers of Korea SD
• /
• v.38 no.12
• /
• pp.25-35
• /
• 2001

In order to analyze the electrical characteristics of complicated thin film transistor-liquid crystal display (TFT-LCD) array circuits, it is indispensible to use simulation programs such as PSPICE and AIM-SPICE. In this paper, we present a systematic method of extracting the input parameters of poly-Si TFT for SPICE simulations. This method was applied to two different types of poly-Si TFTs, fabricated by excimer laser annealing and silicide mediated crystallization methods, and yielded good fitting results to experimental data. Among the SPICE simulators, PSPICE has the graphic user interface feature making the composition of complicated circuits easier. We added successfully a poly-Si TFT device model to the PSPICE simulator, and analyzed easily the electrical characteristics of pixels considering the line RC delay. The results of this work would contribute to efficient simulations of poly-Si TFT-LCD arrays.

• Asian Pacific Journal of Cancer Prevention
• /
• v.17 no.5
• /
• pp.2637-2641
• /
• 2016

Tumor necrosis factor ($TNF-{\alpha}$), an inflammatory cytokine that plays an important role in the control of cell proliferation, differentiation, and apoptosis, has previously been used in anti-cancer therapy. However, the therapeutic applications of $TNF-{\alpha}$ are largely limited due to its general toxicity and anti-apoptotic influence. To overcome this problem, the present study focused on the effect of active constituents isolated from a medicinal plant on $TNF-{\alpha}$-induced apoptosis in human colon adenocarcinoma (HT-29) cells. Nimbolide from Azadirachta indica was evaluated for cytotoxicity by methyl tetrazolium 3-[4,5-dimethylthiazol-2-yl]-2, 5-diphenyltetrazolium bromide (MTT) assay and phase contrast microscopy. Effects on apoptotic signaling proteins were investigated using Western blot analysis. Nimbolide showed cytotoxicity against HT-29 cells that was significantly different from the control group (p<0.01), a concentration of $10{\mu}M$ significantly inducing cell death (p<0.01). In combination with $TNF-{\alpha}$, nimbolide significantly enhanced-induced cell death. In apoptotic pathway, nimbolide activated c-Jun N-terminal kinase (JNK) phosphorylation, BH3 interacting-domain death agonist (Bid) and up-regulated the death receptor 5 (DR5) level. In the combination group, nimbolide markedly sensitized $TNF-{\alpha}$-induced JNK, Bid, caspase-3 activation and the up-regulation of DR5. Our findings overall indicate that nimbolide may enhance $TNF-{\alpha}$-mediated cellular proliferation inhibition through increasing cell apoptosis of HT-29 cells by up-reglation of DR5 expression via the JNK pathway.

• Journal of Information Management
• /
• v.36 no.4
• /
• pp.199-215
• /
• 2005

Experts participating in the knowledge expert network externalize their implicit knowledge by providing information or writing reports. Almost all the members of the network share externalized knowledge and the network facilitate the dissemination and diffusion of knowledge. Individuals reproduce another implicit knowledge by internalizing shared knowledge through the network and re-created knowledge is externalized, establishing knowledge circulation. In this paper, we analyze the expert groups of the Global Network of Korean Scientists & Engineers(KOSEN, www.kosen21.org), the Korea's No. 1 science and engineering knowledge expert community, with the application of the theory of policy network proposed by Marsh & Rhodes. According to the principal standards of policy network classification such as the number of participants, interaction among participants, consistency, distribution of resources and dependency, we categorize the KOSEN expert groups as closed policy network and opened issue network, and divide closed policy network into core community and periphery community.

• The Research Journal of the Costume Culture
• /
• v.7 no.6
• /
• pp.98-115
• /
• 1999

As sports infiltrates each field of modern society and becomes familiar, sports wear was changed functionally and was introduced and enveloped into everyday dress. Modern sports wear has been the settled in everyday life deeply and become the clothes of life which are worn regardless of place, time and age. The aim of this paper was to clarify what kind of fashion of sports style would be given to the modern people. In this study, sports wear which has become everyday dress classified from a gender point of view. It was divided into masculine image, feminine image, and neutral image. Sports wear of masculine image generated a silhouette which emphasized the shoulder with the aspiration for youth and health. Wide shoulder was considered as the symbol of masculine beauty and the expression of healthy beauty. It was reflected well in body conscious look. And owing to the development of up-to-data materials, innovation of design, and the study of human body technology, the functional character was settled in the sports wear which showed masculine image. Sports wear of feminine image was represented fashion of body exposure, body feet with body conscious look, and romantic mode. This image was expressed fashion as comforts, pleasant, active design, materials, color, and romantic feminine beauty. Sports wear of neutral image was expressed into unisex clothes. This cloths have no difference in gender, age, and class. It was used as casual sports wear. In the 1960s, young generation participated in such street sports as street basketball and skate. They usually sore the sports wears of neutral image such as cycling, skating, and ski. In the materials of sports, the development of up-to-data material like lycra made the sayings lifelike, “up-to-data material is the second skin” It show that glamorous feminine image and strong masculine image coexisted. The contemporary concept of sportswear is no longer limited to those clothes for sports found in such places like tennis court or swimming pool. Now, the sports wear become more like casual activity wear all classes of people can enjoy in their life regardless of where they are, when they wear, and even how old they are.

• Journal of the Korean BIBLIA Society for library and Information Science
• /
• v.29 no.2
• /
• pp.127-148
• /
• 2018

This study defined the influence of the quality of job information websites and of user characteristic factors on the user satisfaction and on the intention of the use thereof based on the technical acceptance model to activate research on job information or job information websites in the category of Library and Information Science, amid studies on the Fourth Industrial Revolution in various disciplines emerging. 230 users experienced in job information websites were surveyed. The surveyed data were analyzed by applying the structural equation model. The results are as follows. Accuracy, security, self-efficacy, the perceived easiness of use had a positive effect on the perceived usefulness. Up-to-dateness, self-efficacy, individual innovation had a significant effect on the perceived easiness of use. The perceived usefulness and the perceived easiness of use had a positive effect on user satisfaction, and the user satisfaction had a significant effect on the intention of use.

• Journal of the Korean Society for Library and Information Science
• /
• v.44 no.2
• /
• pp.427-445
• /
• 2010

In our knowledge-based society, a corporation's main growth engine consists of its unique core competences and how these are organized rather than materialized competitive advantage. Intangible factors such as creative organizational culture, learning capability, brands, marketing ability and technology are notable examples of such core competencies. To ensure constant development of a corporation, it is important to understand the environment in which these factors operate. Drawing on literature research, this paper looks at organizational culture and change, and employees' attitudes and resistance factors to such change. To strengthen the explanation of this study the Korea Asset Management Corporation was used as a case study. From the point of view of information science, knowledge has been viewed as that which is found in books and databases. Such "knowledge" is storable, passive and unchangeable. However, more recently it is seen by many researchers that this approach is limited in that it ignores the knowledge that "sits" in human "bodyminds" and organizations. Such knowledge forms the backbone of organizational culture and should be considered in any meaningful study of information.

• The Journal of the Korea Contents Association
• /
• v.10 no.9
• /
• pp.232-242
• /
• 2010

The design consultancy, with the development of economic integration, globalization of industrial design, technology revolution in the world and social economy, has come into being and grown gradually, which has injected new energy for the innovation of products and the expansion of new markets. Meanwhile, designers' function and their means to create value have started to diversify, instead of the single one, designing products only. As far as the thesis is concerned, it introduces relevant literature first so that basic concept, classification and etc. of the present design consultation are given. Second, with the help of certain research in advance, it shows the growth and the trend of design consultancy in UK, Japan and South Korea, as well as designers' progress and the diversion of their function with economy development. Finally, the conclusion is given on the basis of the ambiguity of designers' function in industrial design consultation in present corporations. Besides, it points out what roles are likely to be played by designers, as the planner of the whole project, the maker of the strategy, the provider of the whole program, the guide of clients and the supplier of related database, while providing industrial design consultation.

• The Korean Journal of Community Living Science
• /
• v.20 no.1
• /
• pp.61-69
• /
• 2009

This study was conducted to examine the chemical composition of kiwifruit skin, and to est its anti-microbial activities and cytotoxicities, thus, exploring ways for the economic utilization of kiwifruit skin. Four varieties of kiwifruit were examined: Daeheung, Bidan, Haegeum No.1 and Hayward. Vitamin C content in the fruit skins of Bidan, Daeheung, Haegeum No.1 and Hayward were 72.44, 67.22, 62.51 and 61.44mg/100g, respectively. Total amino acids content in the fruit skins of Bidan, Haegeum No.1, Hayward and Daeheung ere 808.31, 706.02, 629.07 and 464.83mg/100g dry weight, respectively. K and Ca content ere $17.20-45.70{\mu}g/mL$ and $4.58-10.15{\mu}g/mL$. While, other inorganic matter contents were below $4.89{\mu}g/mL$. Anti-microbial activity of kiwifruit skin extracts, in terms of the diameter of inhibition zone when tested against five gram positive and three gram negative microbial trains (even in the concentration of 2,000mg/L), was less than 14.1mm. The hyperplasia inhibition of lung cancer cells by methanol extracts from Bidan and Haegeum No.1 using concentrations of 800mg/L were 27.7% and 14.5%, however, those from Daeheung and Hayward were below 3% Consequently, it will be useful to know that kiwifruit skin can be added to processed goods which demand for higher concentrations of vitamin C, amino acids, K and Ca.

• IE interfaces
• /
• v.16 no.3
• /
• pp.362-374
• /
• 2003

The major objective of this paper is to empirically examine the effect of process maturity on the performance of industrial R&D projects. Process maturity, a fundamental concept of the Capability Maturity Model developed by Software Engineering Institute, represents the essential of Total Quality Management (TQM). Based on literature, our research model constructs process maturity in terms of structured process, goal setting and controlling, metrics, and process learning; and links it to the R&D performance that consists of technical, commercial and managerial successes. The model also includes firm size as a moderator of different effects that process maturity may have across firms. Measures for process maturity are based on the best practices identified in literature. Data are obtained from 77 successful R&D projects carried out by Korean manufacturing firms. Multiple regression and t-test are used to test proposed hypotheses. Findings are as follows. (1) In the R&D process, process maturity partially contributes to the performance of R&D projects. More specifically, goal setting and controlling-related practices drive both technical and commercial successes, while process learning-related practices drive commercial success. In contrast, traditionally emphasized elements such as structured process or metrics are found not to be significant. (2) The degree of process maturity is significantly higher in large firms. (3) Process maturity impacts on commercial success in the case of large firms, whereas it does on technical success in the case of small firms. The results imply that the TQM principles are partially associated with R&D performance, and the nature of benefit from high maturity could vary according to firm size.

• Journal of Engineering Education Research
• /
• v.12 no.4
• /
• pp.30-37
• /
• 2009

The purpose of this study was to examine the difference of problem-solving ability according to student's level of self-efficacy. Participants were 72 junior students who took the course 'Environmental Instrumental Analysis'. Before the PBL activities, students were given the self-efficacy tests to all students. Among them, 44 students(30% of each high and low ranking) were selected and encouraged to complete pre-problem solving tests. The PBL was conducted for 12 weeks using blended learning strategies. After the PBL, 44students completed post-problem solving tests. Results showed that there were differences of problem-solving ability according to student's level of self-efficacy. From the results, instructional strategies for promoting students' self-efficacy should be employed for enhancing problem-solving ability in PBL activities.