• Animal Bioscience
• /
• 제34권9호
• /
• pp.1451-1459
• /
• 2021

Objective: The objectives of the study were to evaluate reproductive performance and selection response through genetic trend of community-based breeding programs (CBBPs) of Bonga sheep. Methods: Reproduction traits data were collected between 2012 and 2018 from Bonga sheep CBBPs. Phenotypic performance was analyzed using the general linear model procedures of Statistical Analysis System. Genetic parameters were estimated by univariate animal model for age at first lambing (AFL) and repeatability models for lambing interval (LI), litter size (LS), and annual reproductive rate (ARR) traits using restricted maximum likelihood method of WOMBAT. For correlations bivariate animal model was used. Best model was chosen based on likelihood ratio test. The genetic trends were estimated by the weighted regression of the average breeding value of the animals on the year of birth/lambing. Results: The overall least squares mean±standard error of AFL, LI, LS, and ARR were 375±12.5, 284±9.9, 1.45±0.010, and 2.31±0.050, respectively. Direct heritability estimates for AFL, LI, LS, and ARR were 0.07±0.190, 0.06±0.120, 0.18±0.070, and 0.25±0.203, respectively. The low heritability for both AFL and LI showed that these traits respond little to selection programs but rather highly depend on animal management options. The annual genetic gains were -0.0281 days, -0.016 days, -0.0002 lambs and 0.0003 lambs for AFL, LI, LS, and ARR, respectively. Conclusion: Implications of the result to future improvement programs were improving management of animals, conservation of prolific flocks and out scaling the CBBP to get better results.

• Animal Bioscience
• /
• 제36권7호
• /
• pp.1067-1074
• /
• 2023

Objective: Better feed efficiency can be achieved by selecting rabbit genotypes with lower residual feed intake (RFI) under high ambient temperatures. Methods: Two genotypes of rabbits (Jabali, Saudi local breed and imported, Spanish V-line) were used to derive RFI and to investigate the relationship between RFI and productive traits. In total, 250 animals (125 each) were housed in individual wire mesh cages in a semi-closed rabbitry. Growth performance, feed criteria, carcass evaluation, biochemical blood analysis, and immune responses were determined. Results: Superiority in growth performance, feed efficiency, carcass characteristics, and cellular immunity was recorded in the Jabali breed compared to the V-line genotype. According to regression analysis, a significant effect of daily body weight gain was found, upon computing the expected feed intake in both genotypes. Moreover, mid-body weight^0.75 had a significant effect only in the Jabali breed. Positive correlation coefficients between RFI and dry matter feed intake or feed conversion ratio were found. The same trend in this relationship between RFI and productive traits was observed in some cases for both genotypes. An opposite trend in correlations was observed in the studied genotypes for some traits. Conclusion: The results suggest that the relationship between RFI and productive traits must be taken into consideration in rabbit breeding programs under the prevailing environment. However, further studies are required to investigate the effect of rabbit genotype and environmental factors on computing RFI.

• 유통과학연구
• /
• 제20권3호
• /
• pp.59-69
• /
• 2022

Purpose: The purpose of this study is to provide information for other journals as well as the continuous development of distribution science research by confirming the globalization performance of the Journal of Distribution Science (JDS), the main journal of KODISA. Research Design, Data, and Methodology: A total of 863 papers published in JDS from 2011 to 2021 searched by scienceON were divided into 4 periods and analyzed under the headings of submission system, standardity, collaboration, and degree of achievement of publication goals. SPSS 24.0 and R 4.1.1 package were used to perform the publication frequency analysis, crosstab-analysis, keyword frequency analysis, and LDA topic modeling were performed. In addition, trend analysis with weight applied to each word was performed. Results: It was found that the ratio of English-written papers, which is the indicator of a journal's starndardity, is continuously increasing, and the ratio of overseas authors, which is the indicator of collaboration, is also continuously increasing. It was confirmed through keyword trend analysis by period and LDA topic modeling results - which were weighted to confirm the degree of achievement of the journal's publication goal - that the articles published by the journal has been in agreement with monthly research topic proposed by JDS. Conclusion: By examining the five criteria for globalization, it can be concluded that JDS's efforts for globalization are achieving significant results and providing effective directions for other academic journals. However, in order for JDS to become a top academic journal, it was suggested that efforts should be made to establish a system for collaborative research by domestic and foreign authors, as well as to provide a clear definition for the monthly research topics and classification of sub-topics.

• 국제지역연구
• /
• 제13권1호
• /
• pp.39-51
• /
• 2009

물가상승률과 실업률을 합한 수치를 미저리 지수(misery index)라고 칭한다. 미저리 지수가 높을수록 국민경제의 성과는 저조한 것을 나타낸다. Lee and Cheong (2007)은 미저리 지수에 경상수지의 GDP대비 비율(%)을 합한 수치를 개방 미저리 지수로 정의하였으며, 동 지수가 개방도가 높은 경제의 성과를 잘 나타낼 수 있다고 주장하였다. 본 논문은 미국에서 개방 미저리 지수가 증가하는 시기는 미국경제의 성과가 저조한 때와 일치한다는 것을 보인다. 특히 2008년에 시작된 현재의 경제위기 이전에 약 10년간 지속적으로 개방 미저리 지수가 상승하는 추세임을 보여준다. 이는, 미국의 현 경제위기에 앞서 지난 10여년간 미국경제의 내부 및 외부불균형이 누적되어 왔음을 보여주는 것이다. 본 논문은 이와 같이 최근의 증가하는 추세의 개방 미저리 지수를 현재의 경제위기의 전조로 해석한다.

• Animal Bioscience
• /
• 제36권11호
• /
• pp.1718-1726
• /
• 2023

Objective: The objective of this study was to investigate the effect of supplementation with enzymolytic soybean meal (ESBM) on broilers fed low crude protein (CP) diets. Methods: A total of 360 one-day-old broilers were randomly assigned to six treatments with 6 replicates per treatment and 10 chicks per replicate for a period of 42 days. Chicks were fed a basal standard high-CP diet as a positive control (PC), a low-CP diet (reducing 10 g/kg CP from the PC) as a negative control (NC), or an NC + 0.5%, 1.0%, 1.5%, or 2.0% ESBM diet. Results: Compared to chicks fed the PC, chicks fed the NC had a decreased body weight gain (BWG, p<0.05) from 1 to 42 days, but supplementation with 2.0% ESBM restored BWG (p<0.05) and even linearly improved the feed conversion rate (FCR, p<0.05). Digestibility of CP and ether extract was increased (p<0.05) in chicks fed a 1.0% ESBM diet compared to the PC. With increasing levels of ESBM, nitrogen (N) excretion decreased (p<0.05). The addition of ESBM to the diet did not affect (p>0.05) serum concentrations of total protein, albumin and total cholesterol but led to a descending trend in triglycerides and an ascending trend in calcium and urea N at 42 days (p<0.10). There were no differences (p>0.05) in villus height (VH), crypt depth (CD), and VH/CD (V/C) of the duodenum and jejunum between the PC and NC at both 21 days and 42 days, while increasing dietary ESBM levels linearly (p<0.05) decreased CD and increased V/C of the duodenum and jejunum at both 21 days and 42 days. Conclusion: The findings indicated that ESBM could be used in broiler low-CP diets to improve production performance, decrease N excretion, and enhance intestinal health.

• 한국엔터테인먼트산업학회논문지
• /
• 제14권6호
• /
• pp.53-60
• /
• 2020

이 연구는 현상의 흐름과 연구의 경향이 맥락적으로 일치한다는 가정을 바탕에 두고 있다. 이에 텍스트 마이닝을 활용하여 한국창작무용 연구의 주제 분석을 통해 춤의 경향을 탐색하는 것에 목적이 있다. 이에 논문 검색 웹사이트에 구축되어 있는 616편의 논문제목에서 1,291개의 단어를 분석하였다. 데이터의 수집 및 정제, 분석은 모두 R 3.6.0 SW을 사용하였다. 연구결과 첫째, 2000년대 이전에는 시대를 나타내는 키워드가 높은 빈도를 나타내었으나 교육 및 신체훈련 측면에서의 한국창작무용 연구유형도 발견되었다. 둘째, 2000년대 이후에는 무용단의 공연활동과 관련된 키워드의 빈도가 높게 나타났으나 최승희가 여전히 한국창작무용 연구에서 중요한 위치에 있다는 것이 확인되었다. 셋째, 한국창작무용 연구의 전체 연구주제를 분석한 결과 '근대시대 최승희의 예술', '현대 전통의 수용 양상과 가치', '전통춤의 안무적 표현 및 활용', '국립무용단의 공연 활동', '시대별 춤 표현', '교육 프로그램의 적용'으로 총 6개의 토픽이 추출되었다. 이 중 '근대시대 최승희의 예술'에 관한 연구가 가장 높은 비중을 차지하고 있는 것으로 나타났다. 넷째, 2000년을 기준으로 상승하고 있는 Hot 토픽은 '국립무용단의 공연 활동'과 '전통춤의 안무적 표현 및 활용'으로 나타났다. 그러나 최근 국립무용단의 공연 기조가 '전통을 기반으로 한 현대화'를 표방하고 있으므로 2000년대 이후 한국창작무용의 경향이 전통춤을 모티프로 한 안무적 표현과 그 활용에 공통적으로 집중되어 있음이 확인되었다. 다섯째, 2000년을 기준으로 하락하고 있는 Cold 토픽은 '시대별 춤 표현'에 관한 연구로 나타났다. 이것은 한국창작춤의 장르적 정착 이후 다양한 춤 스타일의 혼재에 따른 경향으로 연구에 대한 관심도 역시 저하된 것으로 판단되었다.

• Asian-Australasian Journal of Animal Sciences
• /
• 제11권4호
• /
• pp.434-440
• /
• 1998

Seven hybrid lines of Leucaena leucocephala $\times$ L. diversifolia and two control lines of L. leucocephala were compared for their adaptation to acid-soils and tolerance to damage by the psyllid, Heteropsyla cubana, at four locations over two years in Peninsular Malaysia. Primary data on leaf composition and in vitro digestibility (nutrition variables) and secondary data on plant height, stem girth and psyllid damage (agronomy variables) were the measures of performance. Cluster solutions of the nine lines were different within locations, between locations and between years for nutrition and agronomy variables. Controls and hybrids did not cluster separately. Principal component scores of the nine lines gave rank orders which were different by location and by year. No performance trend could be detected between hybrids and controls. The conclusion is that nutritional and agronomic characteristics in Leucaena are independent, soil composition and weather did not consistently affect performance, and evidence is inconclusive as to the benefits of interspecific crossing with L. diversifolia.

• 한국지진공학회:학술대회논문집
• /
• 한국지진공학회 2002년도 춘계 학술발표회 논문집
• /
• pp.341-348
• /
• 2002

This manuscript introduces the Building Standard Law of Japan revised at 2000, June. Recently, The Building Standard Law of Japan was revised into the performance-based design format following the trend of international. The structural performance was evaluated for two limiting states; serviceability and soundness limit state, and safety limit state. The design earthquake forces were determined on the basis of seismic activities of the construction site, taking into consideration (a)characteristics of focal mechanism, (b)amplification by local surfaces geology, and (c)soil-structure interaction, in addition to the properties of the planned building including scale, configuration, foundation system, and structural characteristics.

• 한국지진공학회:학술대회논문집
• /
• 한국지진공학회 2002년도 춘계 학술발표회 논문집
• /
• pp.349-356
• /
• 2002

There has been an increasing trend toward the use of pushover analysis as a tool for evaluating the seismic resistant and safety of a building structure in the performance based earthquake engineering field. The ATC-40 document proposed a nonlinear static procedure based on the Capacity Spectrum Method to determine earthquake-induced demand given the structure pushover curve, which a curve representing base shear versus roof displacement. However, the procedure is conceptually simple, iterative and time consuming method and may sometimes lead to no solution or multiple solutions. A new improved method of seismic performance evaluation for moment frame building, which take into account the previously mentioned deficiencies of currently used elastic design procedures, is presented in this paper. The results of nonlinear static and nonlinear time history analysis of an example high-rise steel moment frame designed by the proposed method are presented and discussed.

• Journal of Information Technology Applications and Management
• /
• 제19권2호
• /
• pp.1-15
• /
• 2012

Many IS researchers had the greatest interesting in publication in leading IS journals. Studies of measuring research performance of Information Systems (IS) are the most important research areas. Today, many IS researchers considered Management Information Systems Quarterly (MISQ), Information Systems Research (ISR), and Journal of Management Information Systems (JMIS) as the leading IS journals. In this study, we analyzed the published papers of Korean and overseas Koreans related IS researchers in ISR, MISQ, and JMIS from 2001 to 2010. The results of this study appeared the trend of increasing frequency of publication of IS research in south Korea in the leading IS journals such as ISR, MISQ, JMIS. The findings of this research showed the excellent performance of IS researchers and provided valuable information regarding publications performance of IS researchers in leading IS Journals.