• 한국어류학회지
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• 제8권1호
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• pp.49-55
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• 1996

무지개송어, Oncorhynchus mykiss 난황자어의 부상기 이전까지의 부화일수에 따른 전장(TL)성장식은 $TLt=2.7e^{-1.24{\cdot}e^{-0.11t}}(r^{2}=0.66)$, 전중(TW)성장식은 $TWt=1.8e^{-2.03{\cdot}e^{-0.11t}}(r^{2}=0.66)$, 체세포중량(SW)성장식은 $SWt=1.8e^{-5.41{\cdot}e^{-0.13t}}(r^{2}=0.83)$로 나타났다. 부화일수 경과에 따른 난황장, 난황고, 난황부피는 감소를 나타내는 직선식이였다. 전중-전장, 체세포중량-전장, 난황장-전장, 난황고-전장, 난황부피-전장, 난황중-전장, 난황중-전중, 난황중-난황고 및 난황중-난황장의 성장형질간의 상대성장식은 부화일 경과에 따라 난황홉수 경향을 반영하였다.

• 한국수산과학회지
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• 제49권5호
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• pp.612-619
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• 2016

In this study, we crossbred Epinephelus akaara and E. lanceolatus to produce a hybrid grouper with faster growth and adaptation to domestic aquaculture environments. The plasma cortisol and glucose levels and osmoregulation (stress response indicators) of the hybrid grouper, E. akaara ♀ × E. lanceolatus ♂, were investigated under several salinity levels (32, 24, 16, and 8 psu). The body lengths and weights of E. akaara (8.2 ± 0.1 cm, 8.3 ± 0.4 g) and the hybrid (8.6 ± 0.1 cm, 10.0 ± 0.4 g) were similar at the start of the experiment, but were significantly different at the end of the experiment. Juveniles of both E. akaara and the hybrid showed greater weight gain, specific growth, and feed conversion rate (FCR) under low salinity of 16 psu. Under the 8 psu treatment, the juvenile E. akaara all died, while the hybrid juveniles survived. Plasma cortisol levels were not affected by lower salinity in both species. The above results indicate that the hybrid is more tolerant of low salinity than is E. akaara, although both species exhibited higher growth and FCR at 16 psu, lower than the salinity of natural seawater. Thus, juveniles of both E. akaara and the hybrid can be more effectively cultured in brackish areas or waters with salinity lower than that of seawater.

• Journal of Korea Trade
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• 제23권7호
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• pp.34-44
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• 2019

Purpose - The purpose of this study is to present what the port of Pyeongtaek, the hub of Korean trade with China, should improve in the current situation, wherein the e-commerce trade volume between Korea and China is increasing due to the development of online technology. Design/methodology - In this study, through prior research and expert interviews on e-commerce and port activation between borders, we derived the main improvement factors for 1) Administration and Systems, 2) Facilities, 3) Transport, and 4) Manpower, and selected 12 detailed variables for the major improvement factors. To identify the relative importance of the major improvement factors, the Analytic Hierarchy Process (AHP) method was applied, and a survey was conducted among 15 related experts. Findings - As a result, among the 12 detailed variables, Composition of Association (0.267) was the first factor to be improved, followed by Incentive Support (0.143) and E-Commerce Cluster (0.131). Based on these analyses, the main implications of this study are, first, in the current situation where the cross-border e-commerce market is growing, Pyeongtaek Port needs to form a consultative body among the government, local governments, and related businesses in connection with cross-border e-commerce and develop various support policies for the e-commerce market. Second, it will have to be able to provide differentiated services from competing ports by establishing e-commerce market-oriented clusters. Originality/value - In existing related studies, various improvements were presented to revitalize trade in line with the growth of the cross-border e-commerce market. However, with regard to most cross-border e-commerce businesses, one-dimensional improvement measures, such as improvement of payment systems, improvement of customs clearance services, and promotion of human resources, are presented in a piecemeal manner. In other words, none of the studies have proposed the importance and priority of each measure in terms of both the forward-looking and efficient allocation of resources, which is the purpose of this study. Therefore, this study contributed politically, practically, and academically by presenting countermeasures for ports to revitalize cross-border e-commerce and presenting strategic priorities using quantitative analysis methods.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2007년도 추계 종합학술대회 논문집
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• pp.421-425
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• 2007

디지털 콘텐트의 폭발적인 증가로 인해, 어떻게 하면 e-resource를 효율적으로 관리하고, Dead Link를 방지하며, 이용자들에게 관련된 콘텐트나 서비스를 체계적으로 안내하고 서비스할 수 있을까? 하는 e-Challenge에 직면해 있다. 본 논문에서는 분산되어 있는 다양한 과학기술정보를 수집하여 지식베이스화(Knowledge Base)하고, 관련정보 간 밀겹합된 링크를 생성함으로써 정보자원에 대한 접근성을 획기적으로 개선하고, 참조링킹 등 차별화된 서비스와 이용자별 최적 정보자원을 제공하는 지식 나침반인 과학기술정보링크센터(CLICK)를 구축하였다. 과학기술정보링크센터를 통하여 전 세계 출판사, 초록 & 색인DB, 검색포털, 원문복사서비스(DDS), 전자도서관, Full Text DB, Aggregator 등이 표준화된 방식으로 연계되면 서비스 채널을 다양화할 수 있으며, 이용자들은 자신들의 이용목적이나 상황에 따라 서비스 채널을 자유롭게 선택할 수 있는 이점이 있다.

• Asian-Australasian Journal of Animal Sciences
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• 제20권3호
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• pp.328-333
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• 2007

Carboxypeptidase E (CPE) plays an important role in the regulation of the body fat content. Therefore, it has been suggested as candidate gene for traits related to meat quality in beef cattle. This study was conducted to identify single nucleotide polymorphisms (SNPs) in the CPE gene and to investigate association of SNP marker with carcass and meat quality traits in Korean cattle. Three SNPs were identified in the intron 4 (A309G SNP and C445T SNP) and exon 5 (C601T SNP) of the CPE gene by sequence analyses of CPE cDNA and genomic DNA samples. The sequences have been deposited in GenBank database with accession numbers AY970664 and AY970663. Genotyping of the gene-specific SNP marker was carried out using the PCR-RFLP with restriction enzymes DdeI for C445T SNP and NlaIII for C601T SNP. The frequencies of C and T alleles were 0.43 and 0.57 for C445T SNP and 0.42 and 0.58 for C601T SNP, respectively. Statistical analysis indicated that the C445T SNP showed a significant effect (p<0.05) on marbling score (MS) and breeding value of backfat thickness (BF-EBV), respectively. Animals with the CT genotype showed higher marbling score and backfat thickness than those with the TT genotype. This marker also showed a significant dominance effect for the MS and BF-EBV (p<0.05). However, no significant associations were observed between C601T SNP genotypes and all traits examined. The results suggest that the CPE gene may be used as a marker for carcass traits in Korean cattle.

• 한국자원식물학회지
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• 제18권1호
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• pp.64-70
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• 2005

부존자원의 최대생산과 농경지 활용 극대화를 위해 패모에 참깨, 들깨, 열무, 홍화 등 간작물을 도입하여 2001년부터 2003년까지 3년에 걸쳐 시험한 바, 패모의 간작물로 도입 된 홍화, 들깨, 참깨, 열무 등은 패모 생육에 지장 없이 재배가 가능하였으며, 작부 유형에 따른 패모의 지상부 생육은 차이가 미미하였으나, 지하부 수량은 단작에서 많았다. 소득은 패모 단작에 비하여 패모+열무와 패모+홍화+들깨의 작부유형에서 각각 $45\%$, $35\%$ 증대되었다.

• 자원리싸이클링
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• 제22권4호
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• pp.55-61
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• 2013

본 연구에서 네오디뮴 (Nd)를 함유한 영구자석의 재활용 공정에 대한 Eco-efficiency 평가를 수행하였다. Eco-efficiency를 분석하기 위해 환경전과정평가 (LCA)와 전과정비용평가 (LCC)가 수행되었다. 환경적 측면에서, 1 kg의 영구자석을 재활용하기 위해서 1.25E + 00 kg $CO_2$ eq.에 해당하는 지구온난화영향을 나타내었으며, 자원고갈 측면에서는 1.10E - 02 Sb eq.에 해당하는 환경영향이 도출되었다. 이 재활용을 위해서 약 2130원의 비용이 소요되었다. 순수한 Nd와 비교를 수행했을 때, 지구온난화 측면에서 6.43배의 효율성이 나타나는 것으로 분석되었으며, 자원고갈 측면에서 분석하였을 때에는 5.32배의 효율성이 나타나는 것으로 분석되었다. 경제적 측면에서, 약 6.74배의 효율성이 나타났으므로, 본 재활용 공정은 환경적 및 경제적으로 모두 개선된 지속가능한 시스템이라고 분석되었다.

• 한국수산과학회지
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• 제54권4호
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• pp.467-479
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• 2021

The distribution and abundance of fish eggs and larvae were investigated from February to December 2020 along the coastal waters of Korea. The eggs and larvae were identified using the mitochondrial DNA cytochrome c oxidase subunit I (mtDNA COI) and 16s rRNA gene. During the study period, eggs of overall 45 taxa belonging to 26 families were collected and larvae of overall 39 taxa belonging to 23 families were collected. In Yeongil Bay, eggs of Engraulis japonicus, which accounted for 83.9% of the total population, was the most dominant species, followed by Sardinops sagax (4.0%), Repomucenus valenciennei (3.8%) and E. japonicus larvae, which accounted for 34.9% of the total population. These were followed by Sebastiscus marmoratus (31.0%). In Gomso Bay, E. japonicus eggs accounted for 61.7% of the total population, followed by Sillago japonica (14.0%), Johnius grypotus (8.8%) and Pholis fangi larvae, which accounted for 53.5% of the total population, followed by Ammodytes personatus (34.1%). In Jinhae Bay, E. japonicus eggs accounted for 86.0% of the total population, followed by Leiognathus nuchalis (4.1%), Konosirus punctatus (3.7%) and E. japonicus larvae, which accounted for 48.7% of the total population, followed by Parablennius yatabei (21.6%).

• 한국지하수토양환경학회지:지하수토양환경
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• 제28권3호
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• pp.12-28
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• 2023

Each national groundwater monitoring well showed distinct change patterns in groundwater levels and electrical conductivity (EC) in the Nakdong River Estuary, implying different external forces (EFs) on each well. According to the annual average data in 1997-2020, seawater was invaded into Well C. The desalination rate of -1,062 µS/cm/year represents the adaptive capacity of the well to seawater intrusion. The water levels and EC in Well E responded to precipitation, indicating the low absorptive capacity to climate changes. Meanwhile, Well B showed constant increases in water levels, suggesting that problems by rising groundwater should be considered in the study area where confined aquifers are overlaid by clay aquitards. The other wells showed consistent water levels and EC, indicating resilience to EFs. Here, resilience is the capacity of a well to resist changes by EFs, including the absorptive and adaptive capacity. The resilience of Wells E and F to climate changes was quantitatively compared using a resilience cost (RC). The RC showed Well F was more resilient than Well E, and the bedrock aquifer was more resilient than the alluvium aquifer, supporting the usefulness of RC. The resilience assessment against EFs (e.g., changes in land use and climate) helps sustainable groundwater management.

• 한국지구과학회지
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• 제39권2호
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• pp.164-177
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• 2018

다양한 지질명소가 국내에 분포하고 있음에도 불구하고, 지질명소를 야외학습장으로 활용하지 못하고 있다. 이 연구의 목적은 상세한 지질조사를 통해 서낭바위 일대를 야외학습장으로 활용 가능하게 하는데 있다. 서낭바위는 강원도 죽왕면 송지호해수욕장 부근에 위치하며, 송지호에서 남동쪽으로 약 1km 떨어져 있다. 서낭바위 일대는 중생대 백악기 속초화강암과 이를 부정합으로 충적층이 덮고 있는 단순한 암석분포를 보인다. 서낭바위 일대는 초중등학생과 일반인들에게 화강암 암상, 구성광물, 풍화과정뿐만 아니라, 절리(N50E/80SW, N40W/84NW), 단층(N42W/83SW), 엽리(N32E/54SE), 암맥(N35E/40SE, N26W/63SW)과 같은 지질구조와, 토르, 타포니, 그루부, 나마와 같은 지형들을 학습할 수 있는 장소이다. 그러므로 서낭바위 일대는 작은 규모의 공간에서 여러 지질 및 지형학적 현상들을 학습하고 서낭바위의 성인을 토론할 수 있는 최적의 야외학습장이다.