• The Journal of Korean Institute of Communications and Information Sciences
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• v.26 no.5A
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• pp.873-878
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• 2001

광케이블을 이용한 기가비트 이더넷은 8B/10B 선로부호 방식을 채택하여 전이중 통신뿐만 아니라 CSMA/CD 방식의 반이중 통신을 지원토록 규정되어 있다. 또한 링크를 공유하고 있는 2대의 1000BASE-X 장치 사이에 구성정보를 교환하여 가장 적합한 통신모드로 동작시킬 수 있는 자동절충 기능을 지원해야 한다. 본 논문에서는 비교적 기능이 간단하고 구현이 용이한 기존의 전이중 방식만의 PCS 설계 방법과 비교하여 반이중 방식까지 지원할 수 있는 PCS 부계층을 기가비트 이더넷 스위치 시스템의 ASIC 칩 안에 구현한 적용 예를 바탕으로 PCS 설계 규격, 구조 및 방법 등을 제시한다.

• Proceedings of the KGS Conference
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• 2002.11a
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• pp.68-73
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• 2002

14~19세기를 거치면서 종법사상의 보급, 동성동본의식의 강화, 부계혈통 중심의 친족의식, 장자우대 관행, 족보간행 등과 더불어 한국의 종족집단(宗族集團)은 사회적 구성에서 중요한 단위로 부각되었다. 종족집단이 갖는 당대의 이 같은 사회적 단위성은 시ㆍ공간상에 다양한 패턴과 경관으로 표출되었는데, 그 중에서 지리학적으로 가장 의미 있는 현상이 '거주지 이동'과 '종족촌락(宗族村落)의 기원'이다.(중략)

• Proceedings of the Korean Information Science Society Conference
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• 2002.04a
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• pp.226-228
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• 2002

이동통신망이 발달하면서 기존의 인프라를 생성하였던 ATM망을 음성서비스에 활용하기 위한 Voice over ATM기술이 많은 발전을 하고 있다. 본 논문에서는 ATM 망에서 Low-bit-rate voice 트래픽을 처리하기 위해 1020개의 커넥션을 지원하는 AAL2 Voice gateway를 구현하였다. 본 논문에서 구현된 AAL2 Voice gateway는 ITU-T Recommendations 1.363.2와 1.366.2에 근거하여 설계하였다. 또한, SSCS(Service Specific Convergence Sublayer)와 CPS(Common Part Sublayer) 부계층을 모두 하드웨어로 구현하였다. 본 AAL2 Voice gateway는 VHDL로 구현되었으며, 이동통신망과 VoDSL의 Voice gateway에서 그 효용 가치가 높을 것으로 사료된다.

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 2006.07a
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• pp.343-343
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• 2006

• Journal of the Korean Home Economics Association
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• v.17 no.3
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• pp.61-69
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• 1979

사회의 가장 기초적인 단위인 가족은 핵가족에서부터 시작된다. Hill(1957)에 의하면 가족에 대한 연구는 일곱가지 면으로 나누어 연구되어 질수 있으며 그 중 하나인 구조적- 기능적 면을 중심으로 한국가족을 이론적으로 분석해 보려는데 본 연구의 목적이 있다. 가족에 대한 구조적 기능적인 면의 분석은 사회학에서 중심적인 연구분야이다. 사회가 변화, 발전함에 따라 가족의 구조와 그 고유한 기능도 변화되어 간다. 사회학적으로 사망, 이혼, 별거, 결혼, 출산에 의해 가족의 구조와 그 기능은 변화되어간다. 한국가족의 구조는 부계직계 확대가족에서 점차 핵가족으로 변화되고 있으며 그 기능도 따라서 변화되어 가고 있다.

• 월간 기계설비
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• s.307
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• pp.69-69
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• 2016

지방계약법 시행령 개정을 통해 공사 분야의 최저가낙찰제가 과도한 가격경쟁을 유발함에 따라 300억원 이상인 공사입찰의 경우 국제표준에 맞게 시공실적, 기술능력, 시공품질 등을 종합적으로 고려하여 낙찰자를 선정하는 종합평가낙찰제로 전환하고, 지방재정 조기집행 활성화를 위하여 계약이행 대가의 지급기간을 단축했다. 또한 지방계약예규 개정을 통해 주계약자공동도급 시 주계약자가 선금 수령일로부터 5일 이내에 부계약자에게 지급토록 하였다.

• Journal of Animal Reproduction and Biotechnology
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• v.34 no.3
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• pp.197-204
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• 2019

This study was investigated to test whether the zygote recognized the topoisomerase II beta (TOP2B) mediated DNA fragmentation in epididymal spermatozoa or the nuclease degradation in vas deferens spermatozoa by testing for the presence of gammaH2AX (γH2AX). The γH2AX is phosphorylation of histone protein H2AX on serine 139 occurs at sites flanking DNA double-stranded breaks (DSBs). The presence of γH2AX in the pronuclei of mouse zygotes which were injected with DNA broke epididymal spermatozoa was tested by immunohistochemistry at 5 and 9 h post fertilization, respectively. Paternal pronuclei that arose from epididymal spermatozoa treated with divalent cations did not stain for γH2AX at 5 h. On the other hand, in embryos injected with vas deferences spermatozoa that had been treated with divalent cations, γH2AX was only present in paternal pronuclei, and not the maternal pronuclei at 5 h. Interestingly, both pronuclei stained positively for γH2AX for all treatments and controls at 9 h after sperm injection. In conclusion, the embryos recognize DNA that is damaged by nuclease, but not by TOP2B because H2AX in phosphorylated in paternal pronuclei resulting from spermatozoa treated with fragmented DNA from vas deferens spermatozoa treated with divalent cations, but not from epididymal spermatozoa treated the same way.

• Journal of Aquaculture
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• v.22 no.1
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• pp.79-82
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• 2009

Reciprocal interspecific hybrids between two bitterling species Rhodeus uyekii (RU) and R. notatus (RN) were genetically identified based on the partial sequence analysis of recombination activating gene-1 (RAG-1) gene. Out of 863 bp positions analyzed, 13 nucleotide substitutions were detected between the two parental species (RU and RN genotypes). Both the induced hybrids (RU female$\times$RN male; UN genotype) and their reciprocal counterparts (RN female$\times$RU male; NU genotype) displayed the double peaks (or polymorphism) of sequence chromatograms at the 13 diagnostic positions, indicating that those hybrids were actual karyogamy derived from the two parental haploid genomes. However, it was not possible to distinguish between the reciprocal interspecific hybrids.

• Journal of Family Relations
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• v.21 no.1
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• pp.123-141
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• 2016

Objective: This study examined correlates of residential proximity between parents and non-coresident married children. A majority of existing studies on intergenerational living arrangement has focused on exploring factors that are associated with intergenerational coresidence only, despite an increasing number of parents and children who do not live together but close by. Because residential proximity facilitates frequent contacts and support exchanges between the two generations, it is important to understand its correlates. Method: The data were drawn from first wave of the Korean Longitudinal Study of Ageing (KLoSA, 2006), a nationally representative sample of adults 45 years or older and their spouses. The analytic sample consisted of 3,950 parents with 10,946 non-coresident married children. Both regression with robust standard errors and sibling fixed effects regression models were estimated using the reg and xtreg procedures in STATA. Results: Younger, less depressed, and more physically impaired parents lived closer to at least one of their married children (within a 30-minute distance by public transportation). Fathers (compared to mothers), parents living in cities (compared to those living in rural areas), parents with at least one co-resident child or fewer numbers of married children tended to have at least one married child living nearby. With regard to child characteristics, married children who were less educated, homeowners, and had more children lived closer to their parents. Also, sons (compared to daughters) lived in closer distance to their parents. Conclusion: Overall, findings suggest that intergenerational residential proximity may primarily be motivated by the childcare needs of married children or parents' needs for assistance with functional impairment. Also, the traditional patrilineal norms of intergenerational support may still be a critical factor in residential decisions as observed in the difference between married sons and daughters in proximity to their parents.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.24 no.1
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• pp.65-70
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• 2020

This paper describes hierarchically stratifying and analyzing haplotrees of haplogroups from haplotypes on the Y and X chromosomes of human cells for genetic and Korean traditional and genealogical trees. The specific region is Chungcheong province, and the Y-DNA of the paternal lines has high frequency of O3a∗ and O2b∗ in the O group, and the mtDNA of the maternal line has a relatively high frequency of D∗ and M∗ in the L3 group. Each combination of these constructs the family tree of the father lines and mother lines. Genetic distances using Nei's standard genetic distance, are very close relatives of less than 0.1 and close relatives of 0.1 to 0.8. Provided, the distance is more than 1.0, it is difficult to estimate relatives. STR has the identified kinship, and SNP has the personal genetic identification. A scientific stratification of the Korean genealogical tree is created by the three factors.