• Proceedings of the Korean Aquaculture Society Conference
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• 2003.10a
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• pp.22-22
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• 2003

로티퍼는 해산어와 담수어뿐만 아니라 식용어와 관상어에 이르기까지 모든 어류의 인공 종묘 생산 과정에서 초기 먹이생물로 이용되고 있는 중요한 동물 플랑크톤이다. 그리고 로티퍼를 초기 자어의 첫 먹이로 사용하는 것을 시작으로 알테미아, 코페포다 또는 초미립자 사료 등을 사용하는 어류 인공종묘 생산 과정에서의 먹이계열이 확립되어 있다. 그러나, 사육하고자 하는 어종에 따라 초기 자어기에서 로티퍼를 섭이하는 시기와 사육 일령별 자어의 로티퍼 포식수를 알 수 있는 정확한 방법이 없다는 이유로 지금까지는 자어의 로티퍼 최초 포식 일령 및 로티퍼 포식수를 개개의 연구자들 나름대로의 방법으로 관찰하여 왔다. 일반적으로 자어가 로티퍼를 포식하였는지의 여부 및 포식수는 자어 소화기내에 존재하는 소화가 진행되기 전의 로티퍼 몸체의 수를 계수하는 방법으로 이루어졌다. 로티퍼의 체내에는 섬모환으로 모은 수중의 먹이 현탁액을 소화기계로 이동시키기 전에 먹이를 잘게 다지고 부수는 기능을 하는 저작기 (trophi)가 존재한다. 그리고 이 저작기는 로티퍼의 종에 따라서 다른 형태를 하고 있는 것으로 알려져 있다. 이 연구에서는 자어가 섭이한 로티퍼는 어류의 소화기내에서 소화가 진행되는 과정에서 로티퍼의 체 구조 중 저작기가 쉽게 소화되기 어렵고 소화기관의 연동 운동에 의해서도 쉽게 그 모양이 손상되지 않는다는 것을 발견하고 이 저작기의 수를 계수하므로서 로티퍼의 최초 섭이 일령 및 일령별 로티퍼 포식수를 계수할 수 있는 방법을 검토하였다. 그 결과, 소화기내의 잔존 로티퍼 몸체만으로 계수 관찰하던 기존 방법에 비교하여 로티퍼의 저작기를 계수하는 방법을 이용할 경우 보다 신뢰도가 높은 결과를 도출할 수 있음을 확인하였다. 경제적 가치의 우수성 때문만은 아니다. 미국은 자국의 대두 생산자들이 생산해 낸 대두를 판매하면서 조성한 자조금을 모아 대두의 생산성을 향상시키기 위한 연구 개발과 국내외 시장을 확대하기 위한 마케팅 활동에 쓰고 있다. 이런 자조 노력은 비단 미국의 대두 농민들에게만 국한된 것이 아니다. 가깝게는 일본의 수산업과 해산어 양식산업의 발전은 중앙 및 지방 정부, 수협과 같은 어민 조합 및 연근해 수산업 종사자들이 출연한 기금을 통해 이루어지고 있음을 지난 8월 북해도의 양식산업을 시찰했을 때 확인할 수 있었던 사실이다. 이제 우리나라도 국민소득 1만불 시대를 넘어 2만불 시대를 열기 위한 청사진을 그릴 만큼 모든 경제의 규모가 확대되었을 뿐 아니라 질적으로 고도화되었다. 우리에게 필요한 것은 성숙된 산업사회에 걸맞는 각 산업 주체들의 의식이다. 한국의 양식산업도 자조 정신을 갖추어 생산성 향상에 초점을 맞춘 양식기술의 개발, 환경 보전을 고려한 양식장 관리 및 소비를 확대하기 위한 유통시스템의 선진화에 스스로 투자를 해야 할 시기에 와 있다.치가 완전히 익은 15일 후에는 무첨가 김치, 0.1%, 0.2% 및 0.3% 고분자 키토산 김치의 젖산균 수는 5.4X107 cfu/g, 3.3X107 cfu/g, 8.6X106 cfu/g 및 2.6X106 cfu/g로 나타났다. 5. 발효가 진행 중에 대장균 군 수가 시간과 더불어 대장균군 수가 모든 구에 있어서 6일까지는 서서히 증가하다가 그 후부터는 대장균 군 수가 감소하였다. 즉, 발효초기에는 모든 구가 2.0X104∼4.0X105 cfu/g이었고, 6일 경에는 8.9X104∼4.5X105 cfu/g로 약간 증가하였으며 15일후에는 키토산 무첨가 김치가 2.0X

• Journal of KIISE:Software and Applications
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• v.28 no.2
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• pp.179-191
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• 2001

Comparison shopping is a merchant brokering process that finds the best price for the desired product from several Web-based online stores. To get a scalable comparison shopper, we need an agent that automatically constructs a simple information extraction procedure, called a wrapper, for each semi-structured store. Automatic construction of wrappers for HTML-based Web stores is difficult because HTML only defines how information is to be displayed, not what it means, and different stores employ different ways of manipulating customer queries and different presentation formats for displaying product descriptions. Wrapper induction has been suggested as a promising strategy for overcoming this heterogeneity. However, previous scalable comparison-shoppers such as ShopBot rely on a strong bias in the product descriptions, and as a result, many stores that do not confirm to this bias were unable to be recognized. This paper proposes a more scalable comparison-shopping agent named MORPHEUS. MORPHEUS presents a simple but robust inductive learning algorithm that antomatically constructs wrappers. The main idea of the proposed algorithm is to recognize the position and the structure of a product description unit by finding the most frequent pattern from the sequence of logical line information in output HTML pages. MORPHEUS successfully constructs correct wtappers for most stores by weakening a bias assumed in previous systems. It also tolerates some noises that might be present in production descriptions such as missing attributes. MORPHEUS generates the wrappers rapidly by excluding the pre-processing phase of removing redundant fragments in a page such as a header, a tailer, and advertisements. Eventually, MORPHEUS provides a framework from which a customized comparison-shopping agent can be organized for a user by facilitating the dynamic addition of new stores.

• Horticultural Science & Technology
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• v.19 no.4
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• pp.526-529
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• 2001

The study was conducted to investigate quality changes of red pepper by different shelf temperatures after storage at $7^{\circ}C$ for 30 days. Red pepper fruits produced high volume of $C_2H_4$ and $CO_2$ when alternating temperatures exceeded $10^{\circ}C$. Total sugar contents were not different among all the treatments. In contrast, sucrose content decreased about half at higher shelf temperature conditions than at $7^{\circ}C$. Capsaicinoid content was not influenced by alternating temperature, but ascorbic acid content tended to decrease by high shelf temperature after storage at $7^{\circ}C$. Decay did not occur under $13^{\circ}C$, while it occurred in 22.2% of hits at $15^{\circ}C$ and 68.8% at room temperature, respectively. From this results, it is suggested that the optimum shelf temperature of red pepper after low temperature storage should be under $13^{\circ}C$ and that fruits of red pepper stored at $7^{\circ}C$ for 30 days could be sold within 10 days on the shelf.

• The Journal of the Korea Contents Association
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• v.20 no.11
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• pp.249-257
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• 2020

The study aims to explore whether the Supplier's social medial activities and the consumer's social media activities mediate between the characteristics of purchasing cosmetics and the intention of purchasing. To answer this question, a total of 321 consumers participated in the study, and a self-report type of questionnaires were utilized to collect the data. For the data analysis, descriptive statistical analysis and structural equation modeling(SEM) were applied. The results from the study are as follows. First, the characteristics of purchasing cosmetics did not affect the intention of purchasing cosmetics. Second, both the Supplier's and the consumer's social media activities positively predicted the intention of purchasing, among which the consumer's activities were ascertained to make more influential impact on the intention of purchasing cosmetics. Third, both Supplier's and consumer's social media activities completely mediated between the characteristics of purchasing cosmetics and the intention of purchasing. More discussions are suggested for marketing strategies in the study.

• Management & Information Systems Review
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• v.30 no.1
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• pp.1-37
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• 2011

Prior researches on Internet shopping have focused on cognitive, technological factors, but this research is focused on emotions experienced during internet shopping. Examines emotion types experienced during internet shopping and shopping mall characteristics influencing emotional response and effect of emotions on internet shopping behavior, specifically focusing on shopping motivation difference. The data, collected from a sample of 323 internet shoppers, indicate that emotion types experienced during internet shopping and shopping mall characteristics influencing emotional response and emotional response influencing internet shopping behavior are difference among shopping motivation. Theses results provide insights on internet shopping mall management according to shopping motivation.

• Journal of Agricultural Extension & Community Development
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• v.20 no.4
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• pp.953-987
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• 2013

This study aimed at identifying level of self-sufficiency, and support need for it in rural multicultural families. Frist, the level of self-sufficiency in rural multicultural families was the lowest in a information sub-area, whereas it was the highest in a socio-psychological relation sub-area. Second, the chi-square test showed that the level of assistant request for a cost-of-living allowance was high in the multicultural family group received the medical social security(MSS) or not prepared the expenditure for children education or the golden years. Whereas the level of assistant request for the education of marketing or agricultural technology was high in the multicultural family group not received MSS or prepared the expenditure for children education or the golden years. Third, rate of PC ownership in the rural multicultural families was lower than that of national whole. and difference of it according to the living characteristics uch as MSS was not statistically significant. Fourth, difference in level of assistant request for children education and social dimension according to the living characteristics such as MSS was not statistically significant. It means that assistant request for children education and social dimension have universality without distinction the living characteristics such as MSS. And to conclude, support for self-sufficiency in rural multicultural families should be selective approach with discriminative or integrational viewpoint according to the living characteristics such as MSS or area of self-sufficiency. Findings of this study may be used as a basic material to establish the policy supporting self-sufficiency in rural multicultural families.

• Journal of Nutrition and Health
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• v.53 no.3
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• pp.255-270
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• 2020

Purpose: The purpose of this study was to identify the factors that influence the consumption of convenience foods among Korean adolescents. Methods: This study had a descriptive cross-sectional study. Data were obtained from the 15th (2019) Korea Youth Risk Behavior Web-based Survey, which involved a nationwide representative sample of 57,303 middle- and high-school students. Convenience-food consumption was defined by frequency of adolescents consuming convenience foods obtained from convenience stores, supermarkets, and cafeterias over the previous 7 days. The analyzed variables were related to sociodemographic, mental health, and health behavior. The Rao-Scott χ² test was applied to examine the difference in the rate of consuming convenience foods obtained from convenience stores according to each factor. Hierarchical logistic regression was conducted to examine the factors that influence convenience-food consumption among Korean adolescents. Results: It was found that 29.1% of Korean adolescents consumed convenience foods obtained from convenience store more than three times per week. The significant influencing factors were female sex; low subjective academic achievement, and subjective household economic status; high perceived stress; low subjective sleep sufficiency; experience of depression; suicidal ideation; lower physical activity; skipping breakfast; lower consumptions of fruit, milk, and vegetables; higher consumptions of soda drinks, sweet drinks, caffeine, and fast food; lower water intake; current smoking and drinking; drug use; and experience of violence. Conclusion: These findings provide a better understanding of the sociodemographic, mental-health, and health-behavior factors that influence the consumption of convenience foods among Korean adolescents. We suggest that differentiated policies, strategies, and nutrition education need to be developed and implemented, in order to address the above-mentioned factors and thereby reduce such behaviors among Korean adolescents.

• Korean Journal of Food Science and Technology
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• v.47 no.1
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• pp.20-26
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• 2015

This study aimed to establish a rapid system for discriminating the cultivation origins and cultivars of dry persimmons, using metabolite fingerprinting by Fourier transform infrared (FT-IR) spectroscopy combined with multivariate analysis. Whole-cell extracts from the sepals of four Korean cultivars and two different Chinese dry persimmons were subjected to FT-IR spectroscopy. Principle component analysis (PCA) and partial least squares discriminant analysis (PLS-DA) of the FT-IR spectral data successfully discriminated six dry persimmons into two groups depending on their cultivation origins. Principal component loading values showed that the 1750-1420 and $1190-950cm^{-1}$ regions of the FT-IR spectra were significantly important for the discrimination of cultivation origins. The accuracy of prediction of the cultivation origins and cultivars by PLS regression was 100% (p<0.01) and 85.9% (p<0.05), respectively. These results clearly show that metabolic fingerprinting of FT-IR spectra can be applied for rapid discrimination of the cultivation origins and cultivars of commercial dry persimmons.

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 2017.04a
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• pp.52-52
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• 2017

연구목적: 생산자와 소비자의 물리적 사회적 거리가 가까워지고, 1일 유통체계 준수에 의한 높은 신선도 유지, 먹거리에 대한 생산자와 생산정보 공유에 의한 농산물 안전성 향상 등 여러 장점 때문에 늘어나고 있는 로컬 푸드의 지속발전을 모색하고자 로컬 푸드 참여농가의 농작업 어려움 조사 및 기계화 방안 제시 조사방법: 전북 완주군 소재 용진농협에서 운영 중인 로컬 푸드 직매장에 농산물을 공급하는 농업인 21인을 대상으로 2016년 11월에 로컬 푸드의 어려운 점, 주요 생산품목, 가장 힘든 농작업, 기계화가 시급한 농작업, 농기계 도입에 어려운 점, 의견 및 건의사항을 설문 조사 분석하였음 결과 및 고찰: 로컬 푸드 참여 농가들은 4~5개 품목을 소량 생산하고, 농가에서 수확 소포장 라벨 부착 후 매장에 직접 진열하고 있었음. 농협은 정선 선별기, 소형 도정기, 포장기, 바코드 기계 등을 설치하여 농가 공동이용, 안전성 신선도 관리 등 교육, 스마트폰 앱을 매장 재고 현황을 농업인에게 실시간으로 제공 등 지원하고 있음. 조사에 응한 농업인 21명 중 60대(13명) > 50대(5명) > 70대(3명)로 모두 50대 이상이었음. 어려운 점에 대한 물음에 대해서는 '판매가 어렵다'(45%) > '인력이 부족하다'(40%) > '생산비가 많이 든다'(8.5%) > 기타(6.5%) 순이었음. '인력부족'은 파종과 수확 시기에 노동력이 집중적으로 필요한 것에 기인하고, 경지 규모가 다소 큰 농가에서는 농사일을 전문으로 하는 외국인 노동자를 고용함으로 노동력 부족 문제를 해소하지만, 소규모 농가는 품삯을 주고 고용할 경우 오히려 적자이기 때문에 고되더라도 자체 노동력으로 해결하고 있는 것으로 조사되었음. 가장 힘든 작업은 수확(81%) > 파종 정식(19%)으로 수확이 절대적으로 힘든 작업이라고 응답하였고, 기계화가 시급한 작업은 수확(71%) > 파종 정식(29%)으로 응답하였음. 힘든 이유로는 적기에 수확을 끝내야 상품성을 인정받을 수 있기 때문에 단기간에 많은 노동력이 요구된다고 응답하였음. 농기계 도입에 어려운 원인으로는, '적합한 수확기계가 없다'(48%)와 '재배면적이 적어 필요성을 못 느낀다'(29%)가 대부분이었고, 이밖에 '가격이 비싸다'(10%), '기계 정확도가 떨어진다'(10%), '기계 조작이 어렵다'(5%)로 나타났음. 결론: 로컬 푸드 참여 농가를 대상으로 농작업 기계화 현황에 대하여 조사하였음. 로컬 푸드의 지속 발전을 위한 방안을 제시하면; 첫째, 중 소농을 위한 수확기 개발이 가장 시급한 것으로 조사되었고, 둘째, 농기계가 아니더라도 우선 힘든 일을 해소하면서 편하게 자세를 유지할 수 있는 작업 보조기구 또는 편이장비의 개발 보급이 필요함. 셋째, 농가의 영세성과 지역의 특성을 고려하여 기술센터 농기계임대사업이나 시군 보조사업을 통해서 소형 농기계, 농기구, 보조 및 편이장비 보급이 확대되어야 함.

• Korean Journal of Agricultural and Forest Meteorology
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• v.11 no.1
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• pp.27-38
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• 2009

The multi-level profile system is designed to measure the vertical profile of $H_2O$ and $CO_2$ concentrations in the surface layer to estimate the storage effects within the plant canopy. It is suitable for long-term experiments and can be used also in advection studies for estimating the spatial variability and vertical gradients in concentration. It enables the user to calculate vertical fluxes of water vapor, $CO_2$ and other trace gases using the surface layer similarity theory and to infer their sources or sinks. The profile system described in this report includes the following components: sampling system, calibration and flow control system, closed path infrared gas analyzer(IRGA), vacuum pump and a datalogger. The sampling system draws air from 8 inlets into the IRGA in a sequence, so that for 80 seconds air from all levels is measured. The calibration system, controlled by the datalogger, compensates for any deviations in the calibration of the IRGA by using gas sources with known concentrations. The datalogger switches the corresponding valves, measures the linearized voltages from the IRGA, calculates the concentrations for each monitoring level, performs statistical analysis and stores the final data. All critical components are mounted in an environmental enclosure and can operate with little maintenance over long periods of time. This report, as a practical manual, is designed to provide helpful information for those who are interested in using profile system to measure evapotranspiration and net ecosystem exchanges in complex terrain.