• 농약과학회지
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• 제15권3호
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• pp.254-268
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• 2011

HPLC-UVD/MS를 이용하여 농산물 시료에서 JH mimic 살충제인 fenoxycarb, pyriproxyfen 및 methoprene의 잔류 분석법을 확립하였다. 농산물 시료에 acetone을 가하여 추출된 fenoxycarb, pyriproxyfen 및 methoprene의 잔류분은 n-hexane/dichloromethane 분배법과 florisil 흡착 크로마토그래피법으로 정제하여 분석대상 시료로 하였다. $C_{18}$ 칼럼을 이용한 HPLC 분석 시 불순물의 간섭은 없었으며, 대표 농산물 중 fenoxycarb, pyriproxyfen 및 methoprene의 정량한계(LOQ)는 0.04 mg/kg이었다. 전체 농산물에 대한 회수율은 80.0~104.3%였으며, 농산물 시료 및 처리수준에 관계없이 10%미만의 분석오차를 나타내어 잔류분석 기준이내를 만족하였다. 본 연구에서 확립한 fenoxycarb, pyriproxyfen 및 methoprlene의 잔류분석법은 검출한계, 회수율 및 분석오차 면에서 국제적 분석기준을 만족할 뿐만 아니라, LC/MS SIM을 이용한 잔류분의 재확인과정 및 회수율 검증의 결과를 총괄해 볼 때 분석과정의 편이성 및 신뢰성이 확보된 공정분석으로 사용이 가능 할 것으로 판단된다.

• Asia pacific journal of information systems
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• 제7권1호
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• pp.85-97
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• 1997

This paper is concerned with knowledge representation schemes best suited for human resource management (HRM) problem domains including human resource planing, selection, placement, compensations, performance evaluation, training and labor-management relations. In order to suggest the scheme we consider two research gods. First, we evaluate and prioritize. The knowledge representation techniques of frames rules, semantic nets and predicate logic that hove been recommended to managerial domains. The combined Analytic Hierarchy Process technique is employed to combine individual judgments effectively between two different expert groups. As a result if we are to select a single knowledge representation technique, a frame representation is best for most HRM domains and to combine frames with others is another choice. Second as a strategy for knowledge representation schemes we show some examples for each damn in terms of labeled semantic nets and two types of rules derived from the semantic nets. We propose nine knowledge components as ontologies. The labeled semantic nets con provide some benefits compared with conventional one. More clearly definea node rode information maces it easy to find the ac information. In the rule sets, the variables are the node of the semantic nets. The consistency of rules is validated by the relationship of the knowledge components.

• 정보처리학회논문지C
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• 제14C권2호
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• pp.155-162
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• 2007

널리 이용되고 있는 공정 큐잉 방식인 WFQ(Weighted Fair Queoing)는 특히 인터넷 전화와 같이 저속이지만 엄격한 지연한계를 요구하는 서비스에 대해 대역폭 이용도가 저하되는 고질적인 문제점을 갖고 있었다. 이러한 WFQ의 문제점은 흐름의 레이턴시가 최적화 되지 않았기 때문으로 최근에 밝혀졌고, 이어서 최적 레이턴시 기반 공정 큐잉 방식인 LOFQ(Latency-Optimized Fair Queuing)가 도입되었다. 그리고 LOFQ에 점유자원 최적화 기능을 추가하여 대역폭 이용도를 개선하고, 반복적으로 수행되던 자원변환 알고리즘을 개선하여 수행 복잡성을 줄이는 등 LOFQ의 성능특성이 향상되었다. 하지만 여전 시뮬레이션에 의해 성능을 평가하고 있어 평가의 정확성과 소요시간 측면에서 어려움이 있다. 따라서 본 연구에서는 LOFQ의 대역폭 이용도를 수학적으로 계산하는 방법을 연구하고자 한다.

• Journal of information and communication convergence engineering
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• 제12권2호
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• pp.109-115
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• 2014

This paper presents a concurrent channel time allocation scheme used in the reservation period for concurrent transmissions in 60-GHz wireless personal area networks (WPANs). To this end, the proposed resource allocation scheme includes an efficient method for creating a concurrent transmission group by using a table that indicates whether individual streams experience interference from other streams or not. The coordinator device calculates the number of streams that can be concurrently transmitted with each stream and groups them together on the basis of the calculation result. Then, the coordinator device allocates resources to each group such that the streams belonging to the same group can transmit data concurrently. Therefore, when the piconet coordinator (PNC) allocates the channel time to the individual groups, it should allow for maximizing the overall capacity. The performance evaluation result demonstrates that the proposed scheme outperforms the random grouping scheme in terms of the overall capacity when the beamwidth is $30^{\circ}C$ and the radiation efficiency is 0.9.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2009년도 하계학술발표대회 논문집
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• pp.409-414
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• 2009

The SK Chemical R&D center is an eco-friendly building designed as top score in the GBCC(GREEN BUILDING CERTIFICATE CRITERIA). This building has applied various eco-friendly technologies such as energy /water resource cutdown, improvement of indoor quality and improvement of user convenience, etc through eco-friendly concept from the design phase. In this thesis, an economic efficiency evaluation has been performed on building energy cwater resource cutdown technologies among them and the results are as follows. The building energy has cut down about 40% compared to ordinary buildings and the investment recovery period was shown as about 5 years. The water resource has cut down about 63% compared to ordinary buildings and the investment recovery period was shown as about 10 years.

• Asian-Australasian Journal of Animal Sciences
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• 제26권4호
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• pp.573-578
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• 2013

A total of 720 1-d-old male broilers (Arbor Acres) with the initial BW = $45{\pm}2$ g were used in a 32-d experiment. Birds were randomly allotted into 1 of 4 treatments according to a completely random block design. Dietary treatments included: i) CON (basal diet), ii) ANT (CON+0.5 g antibiotics/kg feed (bacitracin methylene disalicylate)), iii) BP1 (CON+0.25 bacteriophage/kg feed), and iv) BP2 (CON+0.5 g bacteriophage/kg feed). The BWG and FI were not affected by dietary treatments throughout the whole experiment, whereas BP2 treatment reduced (p<0.05) the feed conversion ratio compared with the CON treatment during 0 to 14 d. The birds fed bacteriophages at the level of 0.25 g/kg increased (p<0.05) the relative liver weight. The inclusion of antibiotic and bacteriophage significantly reduced (p<0.05) the Escherichia coli and Salmonella concentration in the excreta compared with the NC group. Broilers fed the BP2 treatment had higher (p<0.05) lactobacillus counts compared with those fed NC and PC treatments. In conclusion, dietary supplementation of 0.5 g/kg bacteriophages increased feed efficiency and liver weight without effects on the breast muscle properties; also pathogens were inhibited by addition of bacteriophages.

• 한국멀티미디어학회논문지
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• 제17권12호
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• pp.1453-1460
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• 2014

WFQ (Weighted Fair Queuing) provides not only fairness among traffic flows in using bandwidth but also guarantees the Quality of Service (QoS) that individual flow requires, which is why it has been applied to the resource reservation protocol (RSVP)-capable router. The RSVP allocates an enough resource to satisfy both the rate and end-to-end delay requirements of the flow in the condition of no packet loss, and the WFQ scheduler guarantees those QoS requirements with the allocated resource. In practice, however, most QoS-guaranteed services allow a degree of packet loss, especially from 0.1% to 3% for Voice over IP. This paper discovers that the packet loss rate of each traffic flow is determined by only its time-stamp adjustment value, and then enhances the WFQ to provide a differentiated packet loss guarantee under general traffic conditions in terms of both traffic characteristics and QoS requirements. The performance evaluation showed that the proposed WFQ could increase the utilization of bandwidth by 8~11%.

• 지식경영연구
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• 제10권4호
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• pp.115-131
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• 2009

This paper attempts to show that consumers' own information processing mode can play an important role in inducing favorable product evaluations, which is the most key goal of marketing. Th elaboration likelihood model contends that consumers' motivation and knowledge, in addition to the outside marketing information, affects the evaluation process. On the other hand, The resource matching hypothesis suggests that an excessively high level of information processing may lead to negative evaluations. In this study, Need for closure exacerbated overall evaluations of consumers. Such relationship was more salient in the condition of low severity that in the condition of high severity. Also under the situation of low severity, consumers with high level of relevant knowledge made evaluations more favorable, compared to the consumers of low knowledge. On contrast under the situation of high severity, relevant knowledge leaded to less favorable evaluations. This experiment identifies the appropriateness of the elaboration likelihood model and the resource matching hypothesis. Especially This study suggests an rare example that consumers' knowledge may not paly an desirable role in making their judgments.

• 가족자원경영과 정책
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• 제12권1호
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• pp.159-176
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• 2008

The purpose of this study was to review housework research studies in the Journal of Korean Home Economics Association, the Journal of Korean Home Management Association and the Journal of Korean Family Resource Management Association. For this purpose, 109 housework research studies were analyzed according to the themes, published years, the subjects and the research methods. The major findings of this study were as follows. The research on the evaluation of the value of housework was the theme most frequently studied, followed by research on the socialization of housework, housework time, the attitudes on and satisfaction with housework, and the division of housework, in that order. During the periods of 1990-2000 years, housework studies had increased, but since then have slowly decreased. The majority of respondents to housework studies were married women. With respect to employment status of the subjects, both employed and unemployed people were sampled in half of the studies. The sample size was over 300 in almost half of the research reviewed. The most frequently used research method was the surveys using questionnaires. Descriptive statistics, one way ANOVA and multiple regression analysis were the statistical methods used most frequently.

• 수산해양교육연구
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• 제25권1호
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• pp.139-151
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• 2013

Recently, in the context of increased interest for marine tourism, Jeju region of South Korea has attractive waterfront space and also has potential requirements for development. The objective of this paper was to analyze the priority for resource development of waterfront in Jeju region. In order to calculate the importance of factors related to the development of waterfront in Jeju area, this study conducted exploratory factor analysis to extract the factors and established the AHP model based on the factors name focusing on a total of 198 tourists. In this study, in accordance with the procedures of AHP analysis, pairwise comparisons were conducted focusing on a total of 15 experts. Especially, difference test between groups (academics and bureaucratic) was conducted. In the 1st criterion for evaluation, 'exploring experience' factor is most important thing and 'facilities & infrastructure' factors were in the following order. In the secondary criterion, AHP analysis showed that experience facilities, environmental management, and absence of residents consciousness were the important factors. In the future time, the results of this research can be utilized as basic data in the aspects of tourism development in Jeju waterfront region.