• Fisheries and Aquatic Sciences
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• 제19권4호
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• pp.20.1-20.12
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• 2016

The osteological development in Sebastes koreanus is described and illustrated on the basis of 32 larvae [6.11-11.10 mm body length (BL)] and a single juvenile (18.60 mm BL) collected from the Yellow Sea. The first-ossified skeletal elements, which are related to feeding, swimming, and respiration, appear in larvae of 6.27 mm BL; these include the jaw bones, palatine, opercular, hyoid arch, and pectoral girdle. All skeletal elements are fully ossified in the juvenile observed in the study. Ossification of the neurocranium started in the frontal, pterotic, and parietal regions at 6.27 mm BL, and then in the parasphenoid and basioccipital regions at 8.17 mm BL. The vertebrae had started to ossify at ~7.17 mm BL, and their ossification was nearly complete at 11.10 mm BL. In the juvenile, although ossification of the pectoral girdle was fully complete, the fusion of the scapula and uppermost radial had not yet occurred. Thus, the scapula and uppermost radial fuse during or after the juvenile stage. The five hypurals in the caudal skeleton were also fused to form three hypural elements. The osteological results are discussed from a functional viewpoint and in terms of the comparative osteological development in related species.

• 대한가정학회지
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• 제31권3호
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• pp.143-155
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• 1993

In recent years, behavioral disorders of young people and juvenile delinquency tend to increase remarkably in number, and closed up highly as a social and educational problems in Korea. It goes without saying that parents generally play important roles in children's development of personality, and the home is mostly responsible for juvenile delinquency. Therefore, first this paper describes a relation between broken family and juvenile delinquents. Burt, Shideler, Neumayer, and Glueck maintain that broken family is a cause of delinquency, on the other hand, Healy and Sutherland assume a critical attitude toward their contentions. Second, Breckinridge, Merril, and Glueck maintain that poor family is as cause of delinquency, while Sullenger, Neumayer, and Dirksen make a considerable point which poverty has no direct connection with delinquency. Third, abnormal family relationships namely, discord family, abnormal parent-child relationship, and immoral family exert a bad influence upon formation of personality, esepecialy during the period of preschool childhood. These results give some empirical support to the theory that children's conduct disorders and juvenile delinquency are caused by defective family relationships. It is necessary that a community has a supporting structure of children's wholesome development and the prevention of juvenile delinquency.

• 한국발생생물학회지:발생과생식
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• 제19권1호
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• pp.25-31
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• 2015

We have launched an investigation for Embryonic Development, Larvae and Juvenile Morphology, of Buenos aires tetra in order to build basic data of Characidae and fish seeding production. We brought 50 couples of Characidae from Bizidduck aquarium in Yeosu-si, Jeollanamdo, from Korea on March of 2015. We put them in the tetragonal glass aquarium ($50{\times}50{\times}30cm$). Breeding water temperature was $27.5{\sim}28.5^{\circ}C$ (mean $28.0{\pm}0.05^{\circ}C$) and being maintained. The shape of fertilized egg was round shape, and it was adhesive demersal egg. The egg size was 0.63~0.91 mm (mean $0.74{\pm}0.07mm$, n=20). After getting fertilized egg, the developmental stage was gastrula stage, and embryo covered almost two-thirds of Yolk. Incubation was happened after 16 hours 13 minutes from gastrula stage, and the tail of juvenile came out first with tearing egg capsule. Immediately after the incubation, prelarvae had 3.78~3.88 mm length (mean $3.84{\pm}0.04mm$, n=5), and it had no mouth and anus yet. 34 days after hatching from the incubation, juvenile had 8.63~13.1 mm (mean $10.9{\pm}1.66mm$), and it had similar silver-colored body shape with its mother.

• 수산해양기술연구
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• 제51권4호
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• pp.637-643
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• 2015

The diet composition of juvenile Trachurus japonicus were studied using 195 specimens collected from 2013 (May, June, July, and September) to 2014 (May, June, and July) in the coastal waters of Geumodo, Yeosu, Korea. The size of juvenile T. japonicus ranged from 4.3 to 15.2 cm in body length (BL). Juvenile T. japonicus was carnivorous and crustaceans predators that consumes mainly consumed copepods. Its diet also included small quantities of decapods, cirripedians, nematods, chaetognathans, fishes, amphipods, cumaceans, ostracods and euphausiids. The graphical method for feeding strategy revealed that juvenile T. japonicus is an opportunistic and specialized predator on copepods, especially Corycaeus. affinis, and showed narrow niche width. Juvenile T. japonicus showed ontogenetic diet change. Small size group individuals (4.3-8.0 cm BL) mainly consumed copepods. The portion of this prey item decreased in the large size group (8.0-15.2 cm BL), and this decrease was paralleled with increased consumption of decapods.

• 한국컴퓨터정보학회논문지
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• 제25권8호
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• pp.151-157
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• 2020

소년 범죄를 예방 하는 방안으로는 범죄자를 처벌하는 방안을 우선 고려할 수 있다. 그러나 범죄자 처벌이 능사는 아니다. 더구나 판단력이 부족한 특성이 있는 소년기의 특성을 고려하면 처벌 위주 보다는 개선 교육을 제공함으로써 당사자로 하여금 범죄자에게 사회가 가하는 낙인을 피할 수 있게 할 수 있으며 사회 복귀를 통해서 사회적 기술도 터득할 수 있을 뿐만 아니라 사회 발전에 기여할 수 있는 직업 능력을 계발할 수 있는 기회를 상실하지 않을 수 있을 것이다. 소년범죄예방을 위한 해외사례를 종합해보면 미국의 종합전략프로그램 중 배치 매트릭스를 통해서 소년의 요보호성 정도와 위험 노출 정도를 종합적으로 평가하고 범죄 경력의 진행을 고려하여 그에 상응하는 제재를 가하고 그 제재의 정도를 세분화해서 적용하고 있다. 청소년 범죄 예방의 주체로는 사법기관의 독자적인 업무로 보기보다는 가정·학교·지역사회·사법기관 공동으로 청소년 범죄 예방의 주체가 되어야 할 것이다.

• 한국심리학회지:법
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• 제11권2호
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• pp.117-134
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• 2020

본 연구는 냉담-무정서 특질의 하위요인인 냉담성, 부주의/무신경, 감정표현결여와 부모양육행동, 사회경제적 지위가 소년범죄에 미치는 영향을 살펴보고자 했다. 이를 위해 2016년 7월부터 2017년 3월까지 서울 소재 보호관찰소에서 만 15~17세의 소년법 위반 청소년 103명, 2018년 7월에 수도권 소재 고등학교 1, 2학년 123명의 자기보고식 자료를 수집하였다. 먼저 범죄 유무에 따라 주요 변인의 차이를 살펴본 결과, 범죄 집단이 일반 집단에 비해 냉담-무정서 특질의 부주의/무신경이 더 높았고, 사회경제적 지위가 더 낮았다. 또한, 두 집단 모두에서 냉담-무정서 특질 중 유일하게 부주의/무신경이 부모의 수용, 일상생활 모니터링과 유의미한 부적 상관을 나타냈다. 마지막으로, 부주의/무신경과 가정의 경제 수준이 소년범죄를 유의미하게 예측하였다. 이러한 결과는 냉담-무정서 특질이 높은 청소년은 범죄 유무와 상관없이 부모의 긍정적인 양육행동을 적게 지각함을 보여주며, 부주의/무신경과 가정의 경제 수준이 소년범죄의 발생에 기여하는 잠재적 요인임을 시사한다.

• 한국식물학회:학술대회논문집
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• 한국식물학회 1987년도 식물생명공학 심포지움 논문집 Proceedings of Symposia on Plant Biotechnology
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• pp.191-211
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• 1987

Common usage of the concept of juvenility implies that there is one physiological phase, the juvenile phase, which manifests itself in the various morphological and physiological phenomena observed in juvenile higher plants. The juvenile phase is often defined as that time from seed germination until the plant attains the ability to flower regulating such behaviour. This definition precludes plants from flowering in the juvenile phase. It is of major interest, therefore, to identify the physiological controls(Bluehreife) regulating such behavior. The length of the juvenile period in higher plants ranges from one year to over 60 years in different species. The long juvenile period of seedling is the main cause of the long duration of the breeding process. I determined the length of the juvenile period in various plants and its control of phase changes in natural system in relation to factors such as plant size and age, shoot morphology, apex size, root system and phytohormonal and nutritional status is reviewed. From the own experimental and observational evidence available it appears that both hormonal and nutritional factors can be involved in control of juvenility but that a specific juvenile or flowering hormone is not involved. Grafting, ringing, scoring, root pruning and fertilization have been used to accelerate flowering, but in most cases these cultured treatments are only successful on plants that were passed the juvenile phase. It is suggested that there are intrinsic difference between the meristematic cells of the apieces of juvenile and adult shoot, which are thus determined with respect to there development potentialities. The problems associated with the maintenance of the determined state through mitosis are discussed. The properties of transitional forms of Ribes nigrum L. intermediate between the juvenile and adult phase, are descrived and there implications discussed. Analogies are drawn between juvenile phenomena in woody perennials and in herbaceous species.

• Animal Systematics, Evolution and Diversity
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• 제17권1호
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• pp.35-47
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• 2001

한국산 가재 (Cambaroides similis)의 후기배발생과정을 상세히 기재하고, Astacidae와 미국산 가재과(Cambaridae)에서 후기배발생과정이 알려진 종들과 아시아산 가재속 (Cambaroides)의 종들에서, 그 계통적 유연관계를 비교 조사하였다. 한국산 가재의 포란한 암컷은 5월에 출현하였다. 제1, 2 어린시기는 15.0$\pm$0.5$^{\circ}C$에서 각기 2주일과 4주일이 소요되었다. 제3 어린시기에는 모체로부터 이탈하였다. 제1 어린시기의 제1소악과 제2 어린시기의 제2촉각, 제2소악, 복지, 그리고 미지에서 그 형태적 특징들이 가재과(Cambaridae)보다 Astacidae와 매우 유사함을 알 수 있었다.

• 직업교육연구
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• 제33권3호
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• pp.1-17
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• 2014

본 연구는 사회적 약자인 보호소년의 직업능력개발을 위해 보호소년의 직업능력개발훈련 실태를 분석하고, 성공적인 사회 복귀를 위한 개선 방안을 제시하는 데 목적이 있다. 연구목적의 달성을 위해, 직업훈련교사 전수(23명)와 현재 직업훈련에 1개월 이상 참여한 보호소년 533명을 대상으로 설문조사를 실시하였다. 연구 결과, 직업훈련교사와 보호소년 모두 소년원 직업훈련의 내실화를 위한 현장실습강화, 보호소년 학습능력 보완, 전문 인력 확보 등의 개선방안이 요구되었다.

• 수산해양기술연구
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• 제49권3호
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• pp.270-281
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• 2013

Hydro-acoustic surveys with scientific echo sounder were carried out to estimate the total density and distribution of the juvenile cod in Jinhae bay, Korea. The surveys were conducted 4 times from May to June using 2 frequency method (38kHz and 120kHz) and beam trawl were used to investigate the species composition. Also the catch amounts of juvenile cod were compared with the cod density estimated by the hydro-acoustic method. It was confirmed that the juvenile cod was stayed in Jinhae bay in early June and There was the relationship between catch of juvenile cod and the estimated density by hydro-acoustic survey. The number of juvenile cod was consequently about 365,000 fish (CV 12.9%) in May and 113,000 fish (CV 9.2%) in May based on the hydro-acoustic data.