• Title, Summary, Keyword: 발달단계

Search Result 1,410, Processing Time 0.048 seconds

DEVELOPMENTAL PERSPECTIVE ON DEPRESSION IN CHILDHOOD AND ADOLESCENCE (발달적 관점에서 본 아동 및 청소년기 우울증상)

  • Kim, Eun-Jeong;Oh, Kyung-Ja
    • Journal of the Korean Academy of Child and Adolescent Psychiatry
    • /
    • v.3 no.1
    • /
    • pp.117-128
    • /
    • 1992
  • For many years, a number of critical issues have been raised in relation to classification criteria. prevalence and clinical features as well as the concept of childhood depression itself. In order to achieve a better understanding of the childhood depression, empirical data on the prevalence and clinical features of depression in childhood and adolescence were reviewed and discussed from the developmental perspective. The developmental perspective proposes that maladaptive behaviors are products of the coping process to normal developmental tasks and it is necessary to make out the normative and adaptive developmental process in order to understand maladaptive behaviors. Age associated changes in depression symptomatology were discussed in relation to cognitive and socio-emotional development and directions for future research in childhood depression were suggested.

  • PDF

Effect of Anoxia Treatment on the Placental Alcohol Fermentation of Oriental Melon (Cucumis meio) at Different Developmental Stage (발달단계가 다른 참외 태좌부의 알콜발효에 미치는 무산소처리효과)

  • Suh, Dong-Hwan;Choi, Hong-Jip;Choi, Sung-Kuk;Jung, Jin;Hwang, Young-Soo;Kim, Dong-Hern
    • Applied Biological Chemistry
    • /
    • v.40 no.6
    • /
    • pp.572-576
    • /
    • 1997
  • Effect of anoxia treatment on alcohol fermentation in the placenta of oriental melons (Cucumis melo) at different developmental stages was studied. Results showed that fruits at the rapid growth stage (stage III) contained the lowest amount of acetaldehyde and ethanol as compared with fruits at other developmental stages. During anoxia treatment, a steady increase in ethanol content was observed in the placenta of oriental melons, regardless of their developmental stages, while the increment of acetaldehyde content was relatively small. Alcohol dehydrogenase in growing and maturing stage fruits showed increased activity with the maximum value at one day after the onset of anoxia treatment and then decreased gradually. An increase in the activity of pyruvate decarboxylase was also observed during anoxia.

  • PDF

A Comparison between Korean and American College Students' Evolution Concepts based on the History of Evolutionary Ideas (진화개념의 역사에 근거한 한국과 미국 대학생의 진화개념 수준 비교)

  • Ha, Minsu
    • Journal of The Korean Association For Science Education
    • /
    • v.37 no.4
    • /
    • pp.659-668
    • /
    • 2017
  • This study was conducted to identify whether there is a significant difference in the developmental stages of the evolution concept depending on the major and the country. For this study, college students (both biology major and non-biology major) in Korea and the United States answered evolution concept assessment developed by Ha (2007). The data were analyzed based on the method of developed by Ha (2016). As a result of this study, Cronbach alpha for internal consistency reliability and MNSQ indices for item response fitness of the ordered multiple choice method providing 0 to 4 point scores to creationism, teleology, intentionality, use/disuse, and natural selection respectively, satisfied the benchmark. The level of Korean college students' evolution concepts was located in use/disuse and the level of USA college students' evolution concepts was located in teleology. No interaction effect was found between the difference of conceptual progressions of evolution concept by major and country and evolution contexts (human, animal, and plant). There was a significant relationship between developmental stages of evolution concept and their religiosity. Based on the results of this study, we discuss developmental characteristics of evolutionary concepts.

Constant Ratios of Total Chloroplast Volume to Cell Volume in Tobacco and Arabidopsis thaliana at Various Developmetal Stages (담배와 애기장대의 발달단계에 따른 세포부피에 대한 엽록체의 총 부피의 일정한 비율)

  • 정원중;박연일;박주현;민성란;유장렬
    • Korean Journal of Plant Tissue Culture
    • /
    • v.28 no.6
    • /
    • pp.311-315
    • /
    • 2001
  • The relationship among leaf size, leaf protoplast (cell) size, chloroplast size, and chloroplast number were investigated in tobacco and Arabidopsis thaliana at various developmental stages. In tobacco, protoplasts, less than 15.6 ${\mu}{\textrm}{m}$ in diameter had less than 20 chloroplasts, 0.93 ${\mu}{\textrm}{m}$ in thickness and 3.3 ${\mu}{\textrm}{m}$ in length on average. As protoplast size increased from 30 ${\mu}{\textrm}{m}$ to 45 ${\mu}{\textrm}{m}$ in diameter, chloroplast size remained the same (1.57 ${\mu}{\textrm}{m}$ in diameter and 5.55 ${\mu}{\textrm}{m}$ in length on average), but chloroplast number increase from 42 to 101 on average. A similar relationship was also observed in A. thaliana. The ratio of total chloroplast volume to protoplast volume was constant (0.105 in tobacco and 0.325 in A. thaliana) over various developmental stages.

  • PDF

항만 유형과 정보시스템 역할에 관한 연구

  • Park, Nam-Gyu;Choe, Hyeong-Rim;Lee, Chang-Seop;Gang, Mu-Hong
    • Proceedings of the Korea Association of Information Systems Conference
    • /
    • /
    • pp.362-374
    • /
    • 2005
  • 항만정보시스템의 기능과 항만유형과는 관련성이 있는 것일까? 본 연구에서는 선진항만들의 유형과 정보시스템 기능 분석을 통하여 관련성을 규명하고자 하였다. 항만들은 자산의소유와 운영의 주체에 따라 국유제, 공영자치제, 지방자치제(지방정부자치제) 및 사유제의 4가지로 유형으로 구분된다. 유형에 따른 항만들의 주요 활동도 달라진다. 국유제와 지방자치제의 경우는 행정처리 기능에 중점을 두고 있는 반면, 공영자치제와 사유제는 고객서비스강화에 중점을 두고 있다. 항만의 유형과 정보시스템과의 상관관계를 조사한 결과 국유제, 지방자치제 항만에는 업무처리 중심의 시스템이 발달하여 있으며, 사유제 및 공영자치제 항만에는 고객서비스를 최우선으로하는 커뮤니티 시스템과 e-Business 시스템이 발달되어 있었다. 항만유형별 정보시스템의 차이는 부산항만정보시스템의 개선에 시사점을 던져주고 있다. 그동안 국유제 항만으로서 운영되던 부산항이 공영자치제 유형의 운영방식으로 변경됨에 따라 항만정보시스템도 추세에 따라 개선되어야 한다. 본 연구에서 제안하는 방법으로 3단계 방법을 제안하였다. 제 1단계가 미러링(Mirroring) 단계로서 항만운영을 안정화시키는 단계이며, 제 2단계에서는 커뮤니티 시스템을 구축하여 고객의 서비스를 제고시키는 협업화단계로 설정하였으며, 제 3단계는 부가가치창출을 위한 수익형 시스템을 개발하는e-Business 개발단계로 설정하였다.

  • PDF

A Study on the Boulder Stream of Granitoid in Korea (한국 화강암질암류 산지에서 발달하는 암괴류에 관한 연구)

  • Jeon, Young-Gweon
    • Journal of the Korean association of regional geographers
    • /
    • v.6 no.2
    • /
    • pp.71-82
    • /
    • 2000
  • The purpose of this paper is to clarify geomorphic features and development on the boulder stream of granitoid in Korea. Considering the purpose and the method of this paper, three boulder streams are selected : Biseulsan(Mt. Biseul) boulder stream (Daegu city), Maneosan (Mt. Maneo) boulder stream(Gyeongnam province), Geumjeongsan(Mt. Geumjeong) boulder stream (Busan city). The boulder streams mentioned above are bigger in scale and more typical in shape than any other ones in the Korean Peninsula. The main results are summarized as follows. 1. The following are the main features of the boulder streams morphology : the mean gradient is $3{\sim}25^{\circ}$, the longer axes of the component boulders within the deposits averaged about 2m in length, the shapes of the component boulders may be both subangular and subrounded features. 2. The formation of the component boulders is associated with deep weathering of granitoid under warm humid conditions, and the downward movement of boulders occurred by solifluction and frost creep under periglacial conditions. 3. The geomorphic development stage of the boulder streams may be classified into four stages. These boulder streams come under fossil landform stage, the 4th stage ; evidence provided by lichens and weathering features indicate inactive or fossil landform. 4. In generally, boulder streams are well developed on shallow valley floors.

  • PDF