• Ocean and Polar Research
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• 제34권3호
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• pp.275-286
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• 2012

Over the last 20 years there have been more than 3000 peer-reviewed papers relating to climate change and biodiversity published, and still the numbers are increasing. However, most studies focused on the impacts of climate change at population or community levels, and the results invariably reveal that there has been, or will be, a negative effect on the structure and pattern of biodiversity. Moreover, the climate change models and statistical analyses used to test the impacts are only newly developed, and the analyses or predictions can often be misled. In this review, I ask why an individual's life history is considered in the study how climate change affects biodiversity, and what ecological factors are impacted by climate change. Using evidence from a range of species, I demonstrate that diverse life history traits, such as early growth rate, migration/foraging behaviour and lifespan, can be shifted by climate change at individual level. Particularly I discuss that the optimal decision under unknown circumstance (climate change) would be the reduction of the ecological fitness at individual level, and hence, a shift in the balance of the ecosystem could be affected without having a critical impact on any one species. To conclude, I summarize the links between climate changes, ecological decision in life history, the revised consequence at individual level, and discuss how the finely-balanced relationship affects biodiversity and population structure.

• 예술인문사회 융합 멀티미디어 논문지
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• 제7권9호
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• pp.509-518
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• 2017

본 연구는 국내 거주 중국동포 여성 단체장에 대한 생애사 연구로 연구주체의 생애사 재구성 작업을 통해 한국사회와의 긍정적인 상호작용인 인정투쟁의 경험을 살펴보고자 했다. 연구는 내러티브-생애사 분석 방법으로 진행되었다. 생애사 자료는 심층 인터뷰을 통해 수집했다. 연구결과 생애사 연구주체의 생애는 끊임없는 도전의 결과로 한국을 기회의 땅으로 생각하고 한국으로 자발적으로 이주를 하였다. 그는 한국에서 긍정적인 적응전략을 활용하여 인정을 획득하기 위한 치열한 삶으로 분석할 수 있다. 즉 인정투쟁이라는 긍정적인 상호작용을 통하여 주류사회와 협상하고, 긍정적인 경험들을 통하여 자신의 정체성을 확립해 나갔다. 또, 단체활동을 통하여 개인뿐 만 아니라 동포사회 전반의 권리수호와 이미지 향상을 도모하며 주류사회와 융합되기 위해 끊임없이 노력하였다. 이러한 생애사 재구성을 통하여 중국동포 단체장의 생활 실상에 대하여 이해할 수 있고, 그들이 한국사회에서 받고 싶은 인정의 모습들에 대하여 알 수 있다. 따라서 이러한 개별적인 생애사 재구성을 통하여 사회복지 실천에 함의하는 점도 제언하였다.

• Journal of Ecology and Environment
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• 제30권4호
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• pp.319-324
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• 2007

To investigate the impacts of transgenic rice on freshwater organisms, we conducted two life table experiments using Daphnia magna for fifteen and twenty days, respectively. We examined life history traits such as population growth rates (r), reproductive rates ($R_0$), generation times, and survivorship. In the first experiment, we used non-drought-stressed transgenic and non-transgenic rice harvested in 2005. In the second study, we used non-transgenic and transgenic rice harvested in 2006 following drought stress. Each experiment involved three treatments in which D. magna neonates were fed with Selenastrum capricornutum (control treatment) and S. capricornutum with 5% aqueous extracts of non-transgenic rice (N-T) and transgenic rice (T). In the first experiment, D. magna showed reduced population growth rates and lowered fecundity in the N-T and T treatments. In the second experiment, D. magna receiving both transgenic and non-transgenic rice extracts showed very high mortality, low population growth rates and reproduction rates. We could not detect any significant negative effects of extracts from transgenic rice on D. magna life history traits at 95%.

• ALGAE
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• 제20권4호
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• pp.325-331
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• 2005

Populations of Campylaephora borealis (Nakamura) Seo, Cho et Boo and C. crassa (Okamura) Nakamura show a year-around occurrence of all life-history stages. Such a concurrency of life-history stages produces problems in recognizing species in the field. Here, we invesitgated the morphological variation and life-history stages of both species using a statistical character analysis. Life-history stage was correlated with the seawater temperature in C. borealis, whereas it was dependant on biomass in C. crassa. Thalli had dichotomous branches with adaxial branchlets. The statistics showed that the seasonal change in morphology of C. borealis was significantly different from that of C. crassa in seven qualitative characters and five quantitative characters (p < 0.001), although six quantitative features including tetrasporangial size were similar in both species. The morphological difference between the two species may be due to the annual variation of branchlet number and the variance of branch subangle.

• 한국콘텐츠학회논문지
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• 제20권1호
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• pp.505-518
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• 2020

본 연구는 단주과정에 있는 여성의 자기실현에 관한 생애사 연구이다. 연구의 목적은 여성 알코올 중독에 관한 정황들을 탐색하여 치료 및 회복을 위한 논의의 지평을 확장시키고 사회복지적인 개입방안을 제시하는데 있다. 이를 위해 7년 이상 단주 중인 여성 알코올 중독 회복자가 참여했으며, 생애사 분석을 위한 텍스트는 Mandelbaum이 제안한 생애사 분석틀에 의거하여 '삶의 영역', '전환점', '적응'으로 나눴다. 자료분석 결과 <삶의 영역>은 '개인적인 삶의 차원', '자족차원의 삶의 차원', '사회적인 삶의 차원'의 총 3개의 영역으로 분석되었다. <전환점>은 '술을 마시고 폭력을 행사하는 아버지로부터 탈출', '상사의 폭행을 피해 직장을 포기함', 'AA(단주 자조모임) 참여로 서서히 치유의 길을 걸어감'으로 드러났다. <적응>은 '공부를 잘하는 적응전략', '술을 마심으로써 분노를 삭이는 적응전략', 'AA로의 의탁과 자기실현을 생각하는 적응전략' 으로 도출되었다. 이러한 연구결과를 바탕으로 자기실현에 입각한 사회복지 실천 및 정책 차원의 논의를 제시하였다.

• 한국기계가공학회지
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• 제11권1호
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• pp.125-133
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• 2012

This study aims at structural analysis with fatigue on the shock absorber mount of automobile. Two kinds of mount as original model 1 and reinforced model 2 are applied. Among the cases of nonuniform fatigue loads at both models, 'SAE bracket history' with the severest change of load becomes most unstable but 'Sample history' becomes most stable. In case of 'SAE bracket history' or 'SAE transmission', the maximum fatigue life at model 2 is 5 to 6 times as much as model 1 and the minimum damage at model 2 is decreased 5 to 6 times as much as model 1. In case of 'Sample history' as slow fatigue loading history, the minimum damage at model 2 becomes same as model 1 but the maximum fatigue life at model 2 is decreased more than 17 times as much as model 1. In case of 'Sample History' with the average stress of -$10^4MPa$ to $10^4MPa$ and the amplitude stress of 0MPa to $10^4MPa$, the possibility of maximum damage becomes 3%. This stress state can be shown with 5 times more than the damage possibility of 'SAE bracket history' or 'SAE transmission'. Safe and durable design of shock absorber can be effectively improved by using this study result on mount frame.

• 한국사회복지학
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• 제65권1호
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• pp.83-107
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• 2013

이 연구의 목적은 성인입양인의 생애경험을 이해하고자 하는 것이다. 이러한 목적을 달성하기 위하여, 이 연구에서는 한명의 성인입양인을 대상으로 한 심층면접, 관찰, 기록물 등의 방법을 활용하여 자료를 수집하였으며, 생애사 접근을 통해 분석하였다. 자료분석 과정은 우선 연구참여자의 생애 과정을 연대기 형식으로 요약한 뒤, 인생 이야기를 구체적으로 서술하였고, 연구참여자 사례에서 나타난 의미 있는 주제들을 파악하여 기술하고 해석하였다. 또한 앞서 분석된 내용들을 검토하여 입양현장에서 고려해야 할 개입이슈들을 파악하여 논의하였다. 주제분석에서는 '옹이 신세', '나비가 되려는 애벌레', '괜찮아요. 아니, 안괜찮아요', '내가 잘못한 건 아니니까', '사랑, 삶을 이끄는 결정적 요소' 등의 주제들을 발견하여 제시하였으며, 입양 시점, 사후관리, 비밀입양과 공개입양, 뿌리찾기, 성인입양인 대상 개입 등의 개입이슈들을 검토하였다. 이러한 연구결과를 토대로 성인입양인을 지원하기 위한 정책 방향과 실천 지침들을 제언하였다.

• 소음진동
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• 제10권4호
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• pp.686-691
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• 2000

In this paper a computer aided analysis method is proposed for durability assessment in the early design stages using dynamic analysis, stress analysis and fatigue life prediction method. From dynamic analysis of a vehicle suspension system, dynamic load time histories of a suspension component are calculated. From the dynamic load time histories and the stress of the suspension component, a dynamic stress time history at the critical location is produced using the superposition principle. Using linear damage law and cycle counting method, fatigue life cycle is calculated. The predicted fatigue life cycle is verified by experimental durability tests.

• 대한한의학원전학회지
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• 제23권5호
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• pp.1-9
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• 2010

Chuneunja(天隱子) was publication that described the life nurturing(養生) of Taoism, consisted of 8 chapters. It was comparative primary writing and contained important contents in related to the life nurturing of Taoism. It belonged to the life nurturing of Taoism that influenced by Confucianism and Buddhism. It emphasized on the practical and rational thought that mastered morality by performing gradually. It showed the concrete asceticism method like to the basic regimen training of Taoism, for example mind control(調心), flesh control(調身), breath control(調息), conduction exercise(導引), raping teeth (叩齒法) and swallowing saliva(嚥津法). Oriental traditional regimen focused on realizing balanced human character by practicing human mind and body. It may show the direction to modern person that are troubled with harmful effect of modern civilization. If we throw away superstitious and unreal part in the traditional regimen and apply regimen in one's life, we may consider that regimen contribute to human health. Therefore, we require clear understanding for the classic data inherited from predecessors.

• 한국수학교육학회지시리즈D:수학교육연구
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• 제20권1호
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• pp.39-49
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• 2016

The History of Mathematics (HOM) was integrated in teaching the Cartesian Coordinate Plane (CCP) to Grade Seven learners of Moonwalk National High School using Lesson Study. After the lesson was taught, there were three valuable issues emerged: (1) HOM is a Springboard and/or a Medium of Motivation in Teaching CCP; (2) The History of CCP Opened a Wider Perspective about Its Real-life Application in the Modern World (3) Integration of History Developed a Sense of Purpose and an Appreciation of Mathematics Among Learners. Feedbacks solicited from the learners showed that they have understanding of the importance of studying Mathematics after they learned the life and contributions of Rene Descartes to Mathematics. Hence, integration of history plays a vital role in developing positive attitudes among learners towards Math.