• 한국가정과교육학회지
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• 제11권1호
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• pp.73-87
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• 1999

The objectives of this study were to survey stress, eating behavior, and the influences of stress on eating behavior of high school boys and girls. The subjects of this study were 510 high school students(boys 240, girls 270) in Cheongju area. The questionaires were distributed to 510 students, self-evaluated and collected from Mar. 23 to Apr. 4, 1998. The results of this study were as follows： First, the third grade students of high school were suffering from many stress. The rate of such students was 33.9% of total students. Second, eating problems of students were unbalanced diet, irregular diet, omitting a meal. The most irregular meal was breakfast, especially girl students ate breakfast more irregular than boy students. Third, the higher the level of stress of stress of the students, the more eating problem existed. The more students met with stress, the more eating behavior was irregular in eating quantity. In conclusion, stress influences eating behavior of high school students negatively. Therefore, to improve eating behavior of students who are suffering from stress, the program on stress release and nutrition education should be developed and supplied to them.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2004년도 하계학술대회 논문집 Vol.5 No.2
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• pp.748-752
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• 2004

The Hydrogenated amorphous carbon (a-C:H) thin films are deposited to fabricate suppored layer on silicon substrate with a closed field unbalanced magnetron(CFUBM) sputtering system. This study focuses on the characteristic of Diamond like carbon (DLC) films and Pb(Zr,Ti)$O_3$ (PZT) films for membrane structure. The deposition rate and the surface roughness of DLC fims decrease with DC bias voltage. hardness is 26 GPa at -200 V. Interface of DLC/Si and Pt/DLC layers was excellent.

• 한국문헌정보학회지
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• 제23권
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• pp.33-62
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• 1992

The purpose of this is to evaluate the contents through the anal us is of the merits and demerits, and its special quality of the Cutter-Sanborn Three-figure Author Table. table. The abstract of this study is as follows : With the results of the analysis of Cutter-Sanborn's Tabls, several advent-age were found in the area of enumerative-ordinal numbering system, mixed notation, and information retrieval. A defect is that each corporate author and serials and reference book's titles are difficult to be numbered, and there is serious diviation in percentages of the numbers assigned to each letter because each letter apportion rate was applied without any criteria. Such phenomenon decrease the effectiveness as author notation in several letters. The separation of headings are seriously unbalanced because the separation of heading is not consistent with actual publishing trends. This phenomenon made difficult individualization of materials in several letters.

• 벤처창업연구
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• 제1권1호
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• pp.105-125
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• 2006

This paper relates recent empirical research on the growth. Smaller and younger firms have been growing more quickly than larger and older firms, thus, generating proportionately more new jobs. It is not difficult to understand why small and medium firms receive so much attention. Because SMEs provide about 80 percent of private sector employment so SMEs performance is an important economic and social factor. Despite this, they are subject to higher risk and mobility than those at the large firms. This paper is analyzes the relationship between firm growth measured as growth in employment, sales and production and firms age, size and R&D investment. The growth and its relationship with the determinants is linked to industrial policy in Korea. Empirical results are based on an unbalanced panel data covering period 1999-2002. Results show significant relationship between growth, size and age of firm.

• ETRI Journal
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• 제40권5호
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• pp.604-612
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• 2018

To solve the problem of unbalanced loads and the short network lifetime of heterogeneous wireless sensor networks, this paper proposes a node-selection algorithm based on energy balance and dynamic adjustment. The spacing and energy of the nodes are calculated according to the proximity to the network nodes and the characteristics of the link structure. The direction factor and the energy-adjustment factor are introduced to optimize the node-selection probability in order to realize the dynamic selection of network nodes. On this basis, the target path is selected by the relevance of the nodes, and nodes with insufficient energy values are excluded in real time by the establishment of the node-selection mechanism, which guarantees the normal operation of the network and a balanced energy consumption. Simulation results show that this algorithm can effectively extend the network lifetime, and it has better stability, higher accuracy, and an enhanced data-receiving rate in sufficient time.

• 농업과학연구
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• 제38권2호
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• pp.269-275
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• 2011

The objective of this study was to develop a rapid and reliable PCR method for sexing of morula or blastocyst stage bovine embryo. BOV97M and bovine 1.715 satellite DNA sequences were selected for amplification of male and bovine specific DNA, respectively. But the unbalanced number of copies of these two repetitive sequences required some modification of PCR method. Karyotyping of blastomeres were carried for the confirmation of sex determination in bovine embryos. The coincidence rate of sex between biopsied-single blastomere and matched blastocyst was 80.0%. When in vivo- and in vitro- derived embryos were compared, 61.8% and 56.7% were male in in vitro- and in vivo-derived embryos, respectively. In vivo-derived embryos showed better hatching rate than in vitro-derived embryos following biopsy of blastomeres. In conclusion, rapid and effective PCR could be applied to sexing of bovine preimplantation embryos using single blastomere. The sensitivity of this assay may eliminate the need for biopsy of more than one nucleated blastomere and reduce trauma to the embryos derived from biopsy procedure.

• 수산해양기술연구
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• 제30권4호
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• pp.312-319
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• 1994

Recently, with the rapid development in the industries such as an iron mill and chemical plants, there is enlarged by the use of the piping. Sepecially, the piping connected with a fluid, if it is increase the speed of running fluid, ought to generate cavitation phenomenon with unbalanced pressure. So, the cavitation phenomenon cause serious damage of the piping, because it generate erosion and corrosion in the piping. In this study, the steel pipe piping water (SPPW) and SPPW on weldment were tested by using of cavitation-erosion test apparatus with nozzle and were investigated under the marine environment of liquid. (specific resistance : 25 $Omega$. cm) The main results obtained are as follows : 1) The total weight loss and weight loss rate of affected zone of weldment by corrosion-erosion in the sea water are more increased than that of base metal. 2) The electrode potential by corrosion-erosion in the sea water becomes less noble than that of base metal, and current density is more increased. 3) As time goes by, the total weight loss and weight loss rate by cavitation erosion-corrosion in air-liquid 2 phase flow become more increased then those in only liquid solution. but these values turn to be decreased.

• 한국멀티미디어학회논문지
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• 제9권7호
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• pp.844-853
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• 2006

미래 근거리망, 도시망 및 광역망을 위해 최근에 표준화된 IEEE 802.17 레질런트 패킷링의 공정성 제어 방식은 비대칭 과부하에서 지연지터 특성을 악화시키고 대역폭 손실까지 초래하는 문제점을 갖고 이다. 본 논문은 이러한 문제를 해결하기 위해 기존 방식과 호환성을 유지하는 대역폭 재분배 기반 공정성 제어 방식을 제안한다. 제안된 방식에서 체증노드는 상단노드들의 병목링크 사용을 통제한 결과 얻어지는 병목링크의 가용 대역폭을 측정하고 대역폭이 더 필요한 상단노드의 수를 추정하여 최적 공정속도를 계산하며, 계산된 공정속도를 상단노드로 통보하여 가용 대역폭을 재분배 한다. 성능평가 결과 단 2회의 재분배 시도로 가용 대역폭의 95%를 공평하게 분배하였다.

• 한국식생활문화학회지
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• 제35권3호
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• pp.265-277
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• 2020

This study was conducted to investigate dietary adaptations and use of university foodservice in Korea according to the religion of international students. The survey was conducted from April to June in 2017 and included 609 subjects studying at a university in Busan. Muslims showed the highest percentage of eating three meals per day (42.4%) but the highest rate of eating unbalanced meals (64.7%) and midnight meals (41.8%). The most frequent problematic eating habit among Buddhists was irregular mealtimes (46.0%). Adaptation frequency to Korean diet was lowest among Muslims and highest among Christians. Securing halal foods was difficult for Muslims in Korea, and demand for halal foods as a school restaurant menu was high. The response rate for experiencing Korean food at university foodservice was highest among Christians (79.7%) and lowest among Muslims (45.3%). The main reason for not using university foodservice for Muslims was "no menu to eat" for religious reasons, and other religious groups cited "lack of menu variety." Preferred types and recipes of meats, fish, and vegetables also showed significant differences according to religion. As a result, efforts should be made to increase adaptation to life abroad in Korea, including changes in university foodservice management, considering the religious characteristics of international students.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권2호
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• pp.522-541
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• 2016

Network virtualization provides an effective way to overcome the Internet ossification problem. As one of the main challenges in network virtualization, virtual network embedding refers to mapping multiple virtual networks onto a shared substrate network. However, existing heuristic embedding algorithms evaluate the embedding potential of the nodes simply by the product of different resource attributes, which would result in an unbalanced embedding. Furthermore, ignoring the hops of substrate paths that the virtual links would be mapped onto may restrict the ability of the substrate network to accept additional virtual network requests, and lead to low utilization rate of resource. In this paper, we introduce and extend five node attributes that quantify the embedding potential of the nodes from both the local and global views, and adopt the technique for order preference by similarity ideal solution (TOPSIS) to rank the nodes, aiming at balancing different node attributes to increase the utilization rate of resource. Moreover, we propose a novel two-stage virtual network embedding algorithm, which maps the virtual nodes onto the substrate nodes according to the node ranks, and adopts a shortest path-based algorithm to map the virtual links. Simulation results show that the new algorithm significantly increases the long-term average revenue, the long-term revenue to cost ratio and the acceptance ratio.