• 한국태양에너지학회 논문집
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• 제28권5호
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• pp.36-48
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• 2008

This study examines the influence of control algorithms on dimming performance to determine appropriate control setting when direct/indirect lighting is controlled by a daylight dimming system. Computer simulation were performed for a small office with double skin envelope under various daylight conditions. A retractable fabric shading and Venetian blind were applied for internal and external envelopes under three CIE standard sky conditions. Unshielded and partially-shielded photosensors were used, and three control algorithms were applied for the sensors. In general, dimming level was too excessive due to the direct impact of light from lighting fixture to the photosensor. Providing insufficient lighting output, the unshielded photosensor completely failed to secure required illuminance under any daylight condition. When a partially-shielded photosensor was applied under clear sky, three setting points functioned effectively. Less sensitivity for the partially-shielded photosensor was effective to control the dimming system optimally with reasonable energy saving. However, the daylight dimming control system for direct/indirect lighting does not appear to be energy effective when photosensors without enough shielded area is installed on ceiling where light from fixtures reaches directly.

• 한국콘텐츠학회논문지
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• 제18권1호
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• pp.90-107
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• 2018

본 연구는 영업사원의 학습목표지향성, 창의성, 직무관련 행동인 업무방법과 업무강도, 그리고 업무성과에 대한 구조적 관계를 규명하고, 변인들 간에 직 간접적 효과를 확인함과 동시에 창의성과 학습목표지향성, 직무관련 행동, 업무성과의 영향을 구명하는 것을 연구 목적으로 하였다. 본 연구를 위해 588명의 다양한 산업군의 영업사원에게 온라인을 통하여 설문조사를 진행하였고, 연구결과는 다음과 같다. 먼저 변인간의 직접효과를 검증한 결과, 학습목표지향성은 창의성, 업무방법, 업무성과에, 창의성은 업무방법과 업무성과에, 업무방법은 업무성과에 정적으로 유의한 영향을 보였다. 그러나 업무강도는 어떤 변인과도 유의한 직접효과를 나타내지 않았다. 학습목표지향성과 업무성과와의 관계에서 창의성과 업무방법은 간접효과를 가지는 것으로 나타났다. 또한 학습목표지향성과 업무성과의 관계에서 창의성이 포함된 모형이 포함되지 않은 모형보다 매개효과가 더 큰 것으로 밝혀졌다. 이러한 연구결과를 바탕으로 창의성은 직무수행자 개인으로서 영업사원의 업무성과를 높이기 위해 지속적인 개발이 필요한 개인의 역량이라는 결론을 도출하였다.

• 한국생활과학회지
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• 제14권4호
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• pp.547-559
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• 2005

The purpose of this study was to explore the effects of mothers' self-efficacy, parenting behaviors, and children's achievement motivation on children's self-efficacy. Subjects were 591 fifth- and sixth-graders and their mothers in Busan. Statistics and methods used for data analysis were Cronbach's alpha, Pearson's correlation, Multiple Regression, and Path Analysis. Several major findings of this study were as follows: 1) Any difference was not found by sex in children's general and total self-efficacy. Girls' social efficacy, however, was higher than boys'. 2) Achievement motivation had a direct positive effect and was the first positive contribution factor to the self-efficacy of both sexes. 3) On boys' self-efficacy, mothers' own had an indirect positive effect through achievement motivation, and their parental role efficacy had a positive effect, direct or indirect, through their affective parenting behaviors and the boys' achievement motivation; also mothers' affective parenting behaviors had an indirect positive effect through achievement motivation, and their controlling parenting had a direct negative effect. 4) On girls' self-efficacy, mothers' own had a direct positive effect, and their parental role efficacy had an indirect positive effect through their affective and controlling parenting behaviors and the girls' achievement motivation; also mothers' affective parenting behaviors had a positive effect, direct or indirect, through achievement motivation, and the controlling parenting had a negative effect, direct or indirect.

• 한국발생생물학회지:발생과생식
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• 제18권1호
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• pp.1-11
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• 2014

Early growth response 1 (Egr1) is a zinc-finger transcription factor to direct second-wave gene expression leading to cell growth, differentiation and/or apoptosis. While it is well-known that Egr1 controls transcription of an array of targets in various cell types, downstream target gene(s) whose transcription is regulated by Egr1 in the uterus has not been identified yet. Thus, we have tried to identify a list of potential target genes of Egr1 in the uterus by performing multi-step in silico promoter analyses. Analyses of mRNA microarray data provided a cohort of genes (102 genes) which were differentially expressed (DEGs) in the uterus between Egr1(+/+) and Egr1(-/-) mice. In mice, the frequency of putative EGR1 binding sites (EBS) in the promoter of DEGs is significantly higher than that of randomly selected non-DEGs, although it is not correlated with expression levels of DEGs. Furthermore, EBS are considerably enriched within -500 bp of DEG's promoters. Comparative analyses for EBS of DEGs with the promoters of other species provided power to distinguish DEGs with higher probability as EGR1 direct target genes. Eleven EBS in the promoters of 9 genes among analyzed DEGs are conserved between various species including human. In conclusion, this study provides evidence that analyses of mRNA expression profiles followed by two-step in silico analyses could provide a list of putative Egr1 direct target genes in the uterus where any known direct target genes are yet reported for further functional studies.

• 기술혁신연구
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• 제7권1호
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• pp.151-175
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• 1999

This study develops principles for determining and managing costs applicable to grants and cooperative agreements for basic research. We investigated financial management policies of funding agencies and foundations in the United States, United Kingdom, Canada, Germany, Japan and Korea. Also we surveyed opinions of researchers and research fund administrators in Korean universities. Based on our review of funding agencies and our survey, the recommended management policies for grants and cooperative agreements are as follows: (1) Cost Structure. Cost of a sponsored agreement is comprised of the allowable direct costs and allocable portion of the allowable indirect costs. Direct costs can be further divided into salaries and wages, equipment, and other direct costs. (2) Salaries and Wages. Salaries and wages applied to a grant are paid for services rendered to the project during the period of performance of the particular agreement. In order to give researchers financial incentive, researcher allowance can be paid up to 30% of his/her regular salary. (3) Equipment. Any property purchased with grants which has an acquisition cost of 5,000,000 won or more per item and a normal life expectancy of two years or more is defined as equipment. Expenditures for special purpose equipment are allowable provided the acquisition of items is necessary for the research supported by the grant. (4) Other Direct Costs. Other direct costs are comprised of travel (both domestic and foreign), materials, other costs. Other costs may not exceed 30% of total other direct costs. (5) Indirect Costs. Since there is no clear consensus on indirect costs and additional budget is necessary to support actual indirect costs, the practical policy at the moment is to give a research support expense in lieu of indirect costs. In the future, however, some form of actual indirect costs should be supported. This study develops principles for determining and managing costs applicable to grants and cooperative agreements funded by the Ministry of Science and Technology. This research can be applied to other governmental agencies to give consistency and uniformity in administration of grants and cooperative agreements.

• 대한치과교정학회지
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• 제52권4호
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• pp.249-257
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• 2022

Objective: The purpose of this study was to evaluate and compare the dimensional accuracy between thermoformed and direct-printed aligners. Methods: Three types of aligners were manufactured from the same reference standard tessellation language (STL) file: thermoformed aligners were manufactured using Zendura FLX^TM (n = 12) and Essix ACE^TM (n = 12), and direct-printed aligners were printed using Tera Harz^TM TC-85DAP 3D Printer UV Resin (n = 12). The teeth were not manipulated with any tooth-moving software in this study. The samples were sprayed with an opaque scanning spray, scanned, imported to Geomagic^® Control X^TM metrology software, and superimposed on the reference STL file by using the best-fit alignment algorithm. Distances between the aligner meshes and the reference STL file were measured at nine anatomical landmarks. Results: Mean absolute discrepancies in the Zendura FLX^TM aligners ranged from 0.076 ± 0.057 mm to 0.260 ± 0.089 mm and those in the Essix ACE^TM aligners ranged from 0.188 ± 0.271 mm to 0.457 ± 0.350 mm, while in the direct-printed aligners, they ranged from 0.079 ± 0.054 mm to 0.224 ± 0.041 mm. Root mean square values, representing the overall trueness, ranged from 0.209 ± 0.094 mm for Essix ACE^TM, 0.188 ± 0.074 mm for Zendura FLX^TM, and 0.140 ± 0.020 mm for the direct-printed aligners. Conclusions: This study showed greater trueness and precision of direct-printed aligners than thermoformed aligners.

• Weed & Turfgrass Science
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• 제4권1호
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• pp.44-48
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• 2015

형질전환 CPPO06 이벤트 벼를 이용하여 담수직파 재배에서 oxyfluorfen의 적정 처리시기 및 처리량에 대한 연구를 수행하였다. 모본인 동진벼는 10 g a.i. $ha^{-1}$의 농도에서 생육이 억제되었으나, CPPO06 이벤트 벼는 oxyfluorfen 10,000 g a.i. $ha^{-1}$의 농도에서도 생육억제를 보이지 않아 높은 oxyfluorfen 저항성을 보이는 것으로 나타났다. Oxyfluorfen을 써레질 직후와 파종 직후 처리한 결과 가래를 제외한 모든 발생 초종의 방제효과가 뛰어났으며, 파종 5일 후의 경우는 가래를 포함하여 모든 발생 초종이 95% 이상 방제되었다. Oxyfluorfen의 처리시기와 처리량에 따른 생육저해 현상은 없었으며, 안정적인 수확량을 확보할 수 있었다. 담수직파재배에서 oxyfluorfen 처리시기 및 처리량에 따른 CPPO06 이벤트 벼의 안전성 및 잡초방제 효과로 볼 때 담수직파재배면적의 확대가 기대된다.

• Archives of Pharmacal Research
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• 제26권10호
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• pp.846-854
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• 2003

The oligomerization of G-proteincoupled receptors (GPCRs) has been shown to occur by various mechanisms, such as via disulfide covalent linkages, non covalent (ionic, hydrophobic) interactions of the N-terminal, and/or transmembrane and/or intracellular domains. Interactions between GPCRs could involve an association between identical proteins (homomers) or non-identical proteins (heteromers), or between two monomers (to form dimers) or multiple monomers (to form oligomers). It is believed that muscarinic receptors may also be arranged into dimeric or oigomeric complexes, but no systematic experimental evidence exists concerning the direct physical interaction between receptor proteins as its mechanism. We undertook this study to determine whether muscarinic receptors form homomers or a heteromers by direct protein-protein interaction within the same or within different subtypes using a yeast two-hybrid system. Intracellular loops (i1, i2 and i3) and the C-terminal cytoplasmic tails (C) of human muscarinic (Hm) receptor subtypes, Hm1, Hm2 and Hm3, were cloned into the vectors (pB42AD and pLexA) of a two-hybrid system and examined for heteromeric or homodimeric interactions between the cytoplasmic domains. No physical interaction was observed between the intracellular domains of any of the Hm/Hm receptor sets tested. The results of our study suggest that the Hm1, Hm2 and Hm3 receptors do not form dimers or oligomers by interacting directly through either the hydrophilic intracellular domains or the C-terminal tail domains. To further investigate extracellular domain interactions, the N-terminus (N) and extracellular loops (o1 and o2) were also cloned into the two-hybrid vectors. Interactions of Hm2N with Hm2N, Hm2o1, Hm2o2, Hm3N, Hm3o1 or Hm3o2 were examined. The N-terminal domain of Hm2 was found to have no direct interaction with any extracellular domain. From our results, we excluded the possibility of a direct interaction between the muscarinic receptor subtypes (Hm1, Hm2 and Hm3) as a mechanism for homo- or hetero-meric dimerization/oligomerization. On the other hand, it remains a possibility that interaction may occur indirectly or require proper conformation or subunit formation or hydrophobic region involvement.

• 유통과학연구
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• 제14권12호
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• pp.71-78
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• 2016

Purpose - This paper is for the Analysis on the Hindrance Factors and Activation Scheme by the Type of Distribution Channel in Direct transaction of Agricultural Products. As the distribution structure of agricultural products has become changable, farmers seem to use the type of direct distribution in order to enhance the receiving price. This study aims to explore the hindrance factors and income variation rate in direct transaction of agricultural produces, specifically focusing on the 167 farmers. Research design, data, and methodology - To ascertain the hindrance factors exactly by the type of distribution channel, the managements were classified by four subcategories, that is high sales percentage with shopping malls, SNS, shopping malls and SNS, and off-line direct transaction. Results - As a result of the hypothesis test, hinderance factors in online direct deal activation were found to be in the order of the difficulty in continuous content production, the difficulty in shopping mall operation and maintenance, and the difficulty in card commission problems, and in the order of the difficulties in continuous content production, the difficulty in continuous content production, the difficulty in shopping mall operation and maintenance, and the difficulty in branding for the SNS group. Thus, it can be seen that the difficulty in continuous content production, shopping mall operation and maintenance were found to be the biggest obstacles. In addition, hindering factors in online direct deal activation were found to be in the order of the difficulty in credit card settlement, the difficulty in publicity, and the difficulty in dealing with unsold goods. The group with high sales rate in shopping mall was found to be increased by 23.9% in the gross income compared to the previous year, the group with high SNS sales ratio increased by 56.5%, the group with direct offline transaction increased by 37.1%, among which the group with the highest increase rate of SNS sales ratio was found to be the highest from the rate of increase/decrease of the income, which was statistically significant. Conclusions - It can be suggested that government and local government may provide agricultural management with supporting plan which in turn can activate direct transaction in any possible ways.

• Asian-Australasian Journal of Animal Sciences
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• 제5권3호
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• pp.567-570
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• 1992

Variance components were estimated for calf daily gain from birth to 45 days of age in small (S), medium (M) and large (L) lines of beef cattle. Analyses involved records collected on 682 (S), 510 (M) and 228 (L) calves in Iowa, USA from 1978 to 1986. Cytoplasmic lines were determined based on the foundation female in the maternal lineage of each animal. Data were analyzed separately by size line using a derivative-free restricted maximum likelihood procedure under an animal model including additive direct (a), additive maternal (m), cytoplasmic lineage effects and covariance (a, m). The heritabilities for direct and maternal, and the cytoplasmic effects, were 0.13, 0.35 and 0.00 for S, 0.14, 0.32 and 0.00 for M, and 0.05, 0.33 and 0.03 for L. Genetic correlations (a, m) for S, M and L were -0.33, -0.57 and -1.00, respectively. The maternal genetic effect was the most important for calf growth between birth and 45 dyas of age and cytoplasmic variances were not important in any line.