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Array Bounds Check Elimination using Ineguality Graph in Java Just-in-Time Compiler (대소관계 그래프를 이용한 Just-in-Time 컴파일 환경에서의 배열 경계 검사 제거)

  • Choi Sun-il;Moon Soo-mook
    • Journal of KIISE:Software and Applications
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    • v.32 no.12
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    • pp.1283-1291
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    • 2005
  • One of the problems in boosting Java performance using a Just-in-Time (JIT) compiler is removing redundant array bound checks. In conventional static compilers, many powerful algorithms have been developed, yet they are not directly applicable to JIT compilation where the compilation time is part of the whole running time. In the current JIT compilers, we tan use either a naive algorithm that is not powerful enough or an aggressive algorithm which requires the transformation into a static single assignment (SSA) form of programs (and back to the original form after optimization), thus causing too much overhead not appropriate for JIT compilation This paper proposes a new algorithm based on an inequality graph which can eliminate array bounds check codes aggressively without resorting to the SSA form. When we actually perform this type of optimization, there are many constraints in code motion caused by the precise exception rule in Java specification, which would cause the algorithm to miss many opportunities for eliminating away bound checks. We also propose a new method to overcome these constraints.

Effect of N Levels on Dry Matter Yields and Quality of Turf Type Mixtures (하번초형 혼파초지의 N 시비수준이 건물수량과 사료가치에 미치는 영향)

  • 이중해;이인덕;이형석
    • Journal of The Korean Society of Grassland and Forage Science
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    • v.24 no.2
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    • pp.137-144
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    • 2004
  • The objective of this experiment was to suggest the optimum N fertilization level for turf type mixtures {Kentucky bluegrass(Newport) 40% + tall fescue(Rebell Jr.) 20%. + perennial ryegrass(Palmer II) 10% + redtop(Barricuda) 10% + red fescue(Salem) 10% + creeping bentgrass(Crenshaw) 10%}. The field trials were conducted from 1998 to 2000 at Chungnam National University in order to evaluate the dry matter yield and quality on the N levels(100, 150 and 200kg/ha). With increasing the N level, the average DM yields over 2-years of turf type mixtures significantly increased. The average total DM yields were obtained 6,551, 8,182 and 9,501kg/ha at N 100, 150 and 200kg/ha level(p<0.05), respectively. CP content and DMD were increased, whereas fibrous constituents was decreased(p<0.05), but CPDM and DDM yields were significantly increased with increasing the N levels over 2-year(p<0.05). Based on the results, considering the total DM yield and the quality of herbages which were incidentally produced from turf type mixtures, it can be suggested that the suitable N level was 200kg/ha. But increased N fertilizer usage for general purpose use and expenses on turf type mixtures should be considered in advance.

Relationships between subjective teeth awareness and satisfaction on self-esteem (주관적인 치아에 대한 인식 및 만족도와 자아존중감과의 관련성)

  • Jung, Eun-Seo;Lee, Kyeong-Hee
    • Journal of Digital Convergence
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    • v.14 no.2
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    • pp.315-324
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    • 2016
  • The purpose of the study are expected to provide some basic information on counseling, diagnosis and treatment planning for patients related to teeth care. A self-reported questionnaire was filled out by 320 subjects in Seoul and Gyeonggi from May to August, 2015 after permission from Institutional Review Board (IRB). Except 18 copies, 302 data were analyzed using SPSS WIN 19.0 program. The questionnaire consisted of four questions of the general characteristics of the subjects, ten questions of the awareness toward of subjective teeth, five questions of the influence of teeth on appearance, and ten questions of self-esteem. The dependent variables made a 23.4% prediction of self-esteem. If they have higher education(p<0.001), influence of teeth on appearance(p<0.001) and the awareness toward of subjective teeth(p<0.001) had significant influence on self-esteem. The findings suggest that heightened subjective awareness toward teeth seems to be of use for the improvement of self-esteem. Therefore it's required to make an effort to take good care of teeth in terms of color or arrangement as well as oral health.

Relative Importance and Priority of Evaluation Elements in University Department Homepage Selection Process -with Special Reference to College Prep Students in Busan- (대학 학과홈페이지의 평가요소에 대한 상대적 중요도 분석 -부산지역 수험생들의 인식을 중심으로-)

  • Kang, Kyoung-Soo;Lee, Young-Woo;Lee, Kang-Hyuk;Lee, Young-Sook
    • The Journal of the Korea Contents Association
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    • v.15 no.3
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    • pp.488-498
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    • 2015
  • Form the observation that the successful management and operation of university websites brings about university branding effects, this paper attempts to identify the problems in relation to evaluation elements of university homepages and establish a new evaluation model that allows us to grasp the importance and priority of phased evaluation elements. In particular, we tried to secure the objectivity of the importance of department homepage evaluation elements by using AHP(Analytic Hierarchy Process). Our analysis shows that among 29 evaluation elements of department homepage, mobile service, curriculum, description of department's characteristics, guide to homepage usage/accessibility to site map and differentiated educational method were considered to be relatively important whereas the relative importance of department's slogan, differentiated image and identity, linkage to SNS, Q&A bulletin board, operation of department community, and FAQ was low. Based on the findings from our analysis, we present the basic foundation for successful management and operation of university department homepages along with a few suggestions for vitalizing those hompages.

RET Modelling through the Phase Function Measurement at 12.5 GHz (12.5 GHz 대역 위상 함수 특성 측정을 통한 RET 모델링)

  • Han, Il-Tak;Bae, Seok-Hee;Jung, Myoung-Won;Pack, Jung-Ki
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.18 no.3 s.118
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    • pp.334-340
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    • 2007
  • The prediction for vegetation attenuation using the RET model recommended in the ITU-R requires six RET input parameters. Among these, 4 parameters are related to the scattering characteristics of vegetation. To extract these parameters, two methods can be used. One is to extract the parameters by curve fitting of the measured vegetation-attenuation curve with the RET prediction model, and the other is to use the additional phase function measurement data. In the former method, fitting is quite complex and it does not result in the unique results in some cases. In addition, the extracted parameters lack the physical meaning as well. Thus, in this paper, the measurement method of phase function, and the method of extracting the RET model parameters which lead to more accurate and physically more meaningful results are presented. The extracted RET model parameters are also presented. The RET modeling method, measurement data, and the extracted RET model parameters presented in this paper were submitted to the ITU-R meeting in 2006, and adapted for ITU-R report and recommendation P.833.

Survey Studies on the Korean Dietary Life of Red Pepper (한국인(韓國人)의 고추식생활(食生活)에 관한 조사연구(調査硏究))

  • Park, Sang-Ki;Chun, Jae-Kun
    • Applied Biological Chemistry
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    • v.20 no.1
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    • pp.95-100
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    • 1977
  • To get a basic information for improving Korean's pattern of comsuming red pepper and the possibility of its industrial production, consumer's ways of red pepper processing and his present dietary habits were surveyed and the results are follows; (1) Korean's daily consumption of red pepper was on the average 9.2 g on the basis of the whole dried red pepper. (2) The tendency of evading the home drying method was increased; 72.22% in urban community and 50.4% in rural community purchased the dried red pepper in the lump yearly. The household purchasing the fresh red pepper and using the home drying was 27.8% in urban community and 49.6% in rural community, so one third of urban household was still using the home drying method. The case of dependence on tine drying factory was no more than 2.6%. (3) Drying method was mainly sun drying which done on the poor circumstance like as the street side without the proper equipment of drying. Home process of red pepper by housewife was 70.8%, and the old, housekeeper were only 7.3% respectively. (4) The hygienic sense in the drying was rare; 68.8% was not washed and 51.9% of decayed red pepper was eaten. (5) Koreans prefered the strong pungency, deep red color and fine powder form. (6) While the 45.5% of seed was collected by second hand dealer and made use of as resources of edible oil, it was not used effectively due to complexity of its collection system. (7) While 40.1% desired the improvement of red pepper dietary life, 41.1% distrusted the present commercial red pepper powder on the market. From the results above, we conclude the fact many households have still hygienically poor red pepper processed at home, in spite of the red pepper is one of the most important spices in Korea. Considering the growing urban population, reduction of unemployed labor due to the increasing nuclear family and hygienic problems caused by the serious pollution, the improvement of red pepper processing method is urgently required. And it is believed that red pepper has a good prospect to be processed on the industrial scale in Korea.

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A Study to Promote the Export of Korean Hang Over Drinks in Russia (숙취해소음료의 러시아권 시장 수출활성화 방안)

  • Kim, Jihoon;Lim, Sungsoo
    • Journal of Convergence for Information Technology
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    • v.10 no.4
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    • pp.35-45
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    • 2020
  • To diversify the agro-food exports of Korea, this study selected Russia, which is located closet to CIS countries, as a sampling area and sought ways to promote the export of Korean hang over drinks to Russia. This study analyzed the contributing factors to the export, such as Russian consumers' purchasing intentions, as well as the willingness to pay of korean hang over drinks in Russia, using the paper review and on-off line survey data correction method. Major results are as follows. First, Russian consumers' intention of purchasing Korean hang over drinks is higher than Europe and the other products. Therefore, it is necessary to understand the demographic characteristics of Russian consumers and then actively use niche marketing strategies. Second, the purchase intention of Russian consumers towards increased when buying behavior occurred in supermarket, hypermarket- and convenience stores. Third, it seems prefer to pricing of Korean hang over drinks in Russian export market similar to the domestic price level.

A Study on Managerial Strategies of Electronic Mail(E-Mail) Messages as Records (전자우편문서의 기록관리적 접근전략에 관한 연구)

  • Seo, Eun-Gyoung
    • Journal of Korean Society of Archives and Records Management
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    • v.4 no.1
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    • pp.1-21
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    • 2004
  • Records may furnish proof of a particular action, contain information that protects the rights of individuals or government, and document decisions made during the course of government business. As business in and between government agencies will increasingly be conducted through electronic messaging service, the need to manage e-mail messages and systems is the same as for other record management systems concerning the creation of, retention of, and access to public records. Therefore government agencies that use electronic mail(e-mail) have an obligation to make employee aware that e-mail messages, like paper records, must be managed according to established record management procedures. The purpose of this paper is to suggest guidelines and/or strategies on managing e-mail messages as records for agencies which must take steps in order to make, capture, maintain, dispose, store, protect, and provide access to e-mail messages. This paper discusses on the definition of e-mail messages, principles on managing e-mail message, and how to manage e-mail messages as records.

Comparison of Effective Constituents of Korean Paeony Roots(Paeoniae radix) Cultivated in Different Regions (한국산 작약의 산지별 유효성분 비교)

  • Sung, Won-Yong;Yoon, Gwang-Ro;Jang, Sang-Moon
    • Food Science and Preservation
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    • v.7 no.3
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    • pp.297-302
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    • 2000
  • To compare the contents of well-known effective constituents, paeoniflorin, albiflorin and benzoic acid, of Korean paeony roots cultivated at different regions, this study was to provide the basic information for the quality evaluation of paeony roots. HPLC analysis showed that the paeoniflorin contents of white paeony roots of 3 years grown at Eui-seong gun, Kyungpook was the highest of 2.06% and red paeony roots of 3 years grown at Im-sil gun, Junpook was the lowest of 1.33%. The highest level of albiflorin contents was 2.04% of red paeony root grown at Ul-jin gun, Kyungpook, while the lowest levels were 0.05% of Eui-seong gun, Kyungpook and 0.06% of Im-shil gun, Junpook. The highest level of benzoic acid contents was 0.12% of red paony roots grown at Choung-do gun, Kyungpook and that grown at Ul-jin gun, Kyungpook was the lowest. Based on the average of three available constituents, the paeony roots cultivated at Kyungpook province was the highest contents of 2.03%, while 1.47% at Junpook province. These results suggest that Kyungpook province is the best region for the cultivation of white and red paeony roots, the combining of three available constituents would be more accurate than use of paeoniflorin only.

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An Empirical Study on the Effects of Store-IT Management Service Quality on Continuous Intention (점포IT관리 서비스품질이 지속사용의도에 미치는 영향에 관한 실증 연구)

  • Han, Byung-Sung;An, Yong-Jun;Han, Kyeong-Seok
    • Journal of Digital Convergence
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    • v.14 no.8
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    • pp.115-125
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    • 2016
  • Recently, there has been a demand for high quality services as the number of stores that use IT devices increases, and the importance regarding that matter has been emphasized. This study analyzed the factors that influence the effects of Store-IT Management Service. With customers who experienced Store-IT Management Service Quality as targets, it figured out the effects that Store-IT Management Service Quality had on Service Confirmation, Customer Satisfaction, and Continuous Intention. As a result, looking closely at the effects that Store-IT Management Service Quality had on Service Confirmation, it turned out that empathy, reliability, tangibility, and assurance had positive effects. As for the effects that Store-IT Management Service Quality had on Customer Satisfaction, empathy, reliability, and tangibility turned out to be important factors that had positive effects. In addition, Service Confirmation and Customer Satisfaction to Store-IT Management Service Quality turned out to have positive effects on Continuous Intention. With these results, given factors of Store-IT Management Service Quality, via Service Confirmation and Customer Satisfaction, were verified to have positive effect relationships with Continuous Intention. The result of this study is expected to help enhance Store-IT Management Service Quality.