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Solar Photovoltaics Technology: No longer an Outlier

  • Kazmerski, Lawrence L.
    • 한국진공학회:학술대회논문집
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    • 한국진공학회 2011년도 제41회 하계 정기 학술대회 초록집
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    • pp.70-70
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    • 2011
  • The prospects of current and coming solar-photovoltaic (PV) technologies are envisioned, arguing this solar-electricity source is beyond a tipping point in the complex worldwide energy outlook. Truly, a revolution in both the technological advancements of solar PV and the deployment of this energy technology is underway; PV is no longer an outlier. The birth of modern photovoltaics (PV) traces only to the mid-1950s, with the Bell Telephone Laboratories' development of an efficient, single-crystal Si solar cell. Since then, Si has dominated the technology and the markets, from space through terrestrial applications. Recently, some significant shift toward technology diversity have taken place. Some focus of this presentation will be directed toward PV R&D and technology advances, with indications of the limitations and relative strengths of crystalline (Si and GaAs) and thin-film (a-Si:H, Si, Cu(In,Ga)(Se,S)2, CdTe). Recent advances, contributions, industry growth, and technological pathways for transformational now and near-term technologies (Si and primarily thin films) and status and forecasts for next-generation PV (nanotechnologies and non-conventional and "new-physics" approaches) are evaluated. The need for R&D accelerating the now and imminent (evolutionary) technologies balanced with work in mid-term (disruptive) approaches is highlighted. Moreover, technology progress and ownership for next generation solar PV mandates a balanced investment in research on longer-term (the revolution needs revolutionary approaches to sustain itself) technologies (quantum dots, multi-multijunctions, intermediate-band concepts, nanotubes, bio-inspired, thermophotonics, ${\ldots}$ and solar hydrogen) having high-risk, but extremely high performance and cost returns for our next generations of energy consumers. This presentation provides insights to the reasons for PV technology emergence, how these technologies have to be developed (an appreciation of the history of solar PV)-and where we can expect to be by this mid-21st century.

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일부대학생의 성의식 및 성행동에 관한 연구 (A Study on Sexual Behavior and Attitudes among College Students in Seoul)

  • 문인옥
    • 보건교육건강증진학회지
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    • 제14권2호
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    • pp.95-112
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    • 1997
  • This study examines knowledge, attitudes and behaviors toward sexual activity among 412 college students in Seoul. An 127-item questionnaire is used in order to understand and consider alcircumstances involved in decisions about sexual activity, and to reflect to the course on healthy sexuality. The major findings are as follows: 1. ‘Books/media’ and ‘friends’ are the primary source of sexual knowledge. 2. Despite the increased number of sxeducation programs, peers apparently remain the major source of information and the counsellor of the sexual problems(71.6%). 3. About ninety percent of males and 14.2 percent of females masurbate. Although mastubation is anormal response to pleasurable bodily feelings, students feel ‘unnatural’, ‘bad’ or ‘guilty’. 4. For some students, sexual intercourse is perceived as the natural outgrowth of love. More than thirty oercent of males and 8. 1 percent of females are engaged in inter -course. 5. Asking parents or teachers to be specific in talking about sex makes it uncomfortable to discuss sex. 6. Sex education should begin in the family and in school in early childhood and continue throughout life. 7. Sexual feelings and emotions are stirred up differently between male and female by sexual sensations. 8. Half of the intimate relationship with opposite sex shows a love relationship with sexual closeness and pleasure. Unguided reading or peers remain the primary source of information about topics like masurbation and sexual technique. Thus, schools should be responsible for the more value-laden subjects (such as birth control, homosexuality, and sexual techniques). And inclusionof a peer education componebt that modified college students' perceived peer norms may be the intervention method of choice. The prevention of health problems is far more desirable than treatment. The earlier the knowledge and skill to make healthful decisions are instilled, the greater the chance a healthful lifestyle will be adopted. School is the logical place in our society to provide the college students learning opportunities essential to developing the knowledge and skills to choose a healthful life course.

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우리나라 서민녀의 일상복에 관한 민속학적 연구 (조선조말~1950년대) (A Study on Everday Wear of Korean Common Woman with Folklore)

  • 이주원
    • 대한가정학회지
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    • 제28권4호
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    • pp.15-30
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    • 1990
  • From now, we've made a study of Korean Clothing about our Royal family's or high birth person's and made little of our plain folk's. Our traditional clothing is plain folk's clothing and that is our fundamental clothing, so plain folk's clothing has an important part in our life. In this point, first we were concerned about the plain folk woman's clothing in the plain folk's clothing and it consists of the way of ethnographic method like listening from the lod about their contant living wear-daily wear. This research covers the time from the end of the Yee-Dynasty to 1950's and the place, each province where the primitive dwellers still live and respondent's age range is about from 60 to 80. In the viwepoint of our climate and construction, women should be over-worn an underwear and they have worn the underwear for the purpose of their heating and the inflating of the skirt. The end of the Yee-Dynasty, high society person wore underwear 7-8 layers thick and also the sow society person wore it 3-4 layers thick. The Plain folk woman clothing's basic system is the skirt and Korean jacket and dari-sok-got, sok-sok-got, pants, dan-sok-got as an underwear, and Korean socks and Korean shoes(straw shoes) are added. This research discusses these clothing by dividing them into each part and enlighten the peculiarity, shape, cloth and how to construct and especially about the difficult-making Korean jacket, we handled the method of rough guess sizing. As the result, we found that each province had a similar peculiarity in the general clothing but they had a different cloth name and a wearing method. Especially, An-dong an Eum-sung, they'd worn their own traditional wear, sal-chang-hojaengiee. We made a good product of rough guess sizing data those have not been known.

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우리 성명(姓名)의 생성 발달에 대하여 (The Origin and Development of Korean Names)

  • 도수희
    • 인문언어
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    • 제1권1호
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    • pp.255-274
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    • 2001
  • This paper examines the history of Korean names, focusing on the structural characteristics and the literal meanings of those for kings and ordinary people. Roughly speaking, the Korean surname system traces its source to China. Historical records show that the Chinese were already using their family names around 1000 B.C. After a millennium or so, the Korean began to follow suit. Initially, however, surnames were in regular use among kings and their kin only: it was not until the late Shilla dynasty, around A.D. 800, that the commoners began to have Heir surnames. And yet, surnames still tended to be limited to men of noble birth, until around A.D. 1000. Though the Korean surname system may be said to have its origin in Chinese, there are no lack of native surnames that have as long a history, e.g., Hae, Bak, Sok, Sol, Ul, and Ol. Typical surnames of Chinese origin that are found during the late Shilla dynasty, around A.D. 900, include Jang (as in Jang Bogo) and Choi (as in Choi Chiwon). Unlike those of Chinese origin, typical Korean names during the age of Three Nations tended to allude to nature or natural phenomena, as can be witnessed in Bit 'light,' Balgum 'bright,' Nuri 'world,' and Soidori where soi means 'steel' and dol 'stone,' Other surnames abound that have to do with river, stream, field, prairie, and so on. King Muryong's original name was Sama, a variant of som 'island,' indicating where he was born. A person skilled in archery was called Jumong or Hwalbo. Baembo was so called because he 'crawls like a snake, baem,' In these last two examples, bo, as well as its variant bu, functions as a suffix, and is also found in Cochilbu, Isabu, Babo, Nolbu, Hungbu, etc. The tradition of using this kind of native Korean names has gradually disappeared, giving place to the names of Chinese style-although very recently we see an on-going movement toward using native names.

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쌍태임신에 관한 임상적 고찰;I. 주산기 사망 (Clinical Study in Twin-Pregnancy;I. Perinatal Mortality)

  • 박찬규;곽현모
    • Clinical and Experimental Reproductive Medicine
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    • 제8권1호
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    • pp.23-34
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    • 1981
  • In order to study twin pregnancies, a retrospective survey was carried out in Yonsei University, Severance Hospital. Twin deliveries during 1967-1976 numbered altogether 264, and their relative frequency was 1.30%. Clinical palpation in addition to auscultation and roentgenologic technique had been used in the twin diagnosis. The diagnosis was made prior to delivery in 93.18% of the cases. The deliveries took place in the 37.26th (S.D. 3.95) gestational weeks on an average. The mean weights of the infants were-A (first baby) 2416.03g. (S.D. 802.61), and B (second baby) 2299.81g. (S.D. 190.31). The most common manner of twin delivery was spontaneous vaginal delivery. Cesarean section was done in 14.39%, of which the most common indication was hypotonic uterine dysfunction (34.21 %). Low one minute Apgar scores occured more often in B twins than among A twins. Breech delivery gave low one minute Apgar scores more often than did spontaneous vertex delivery in both twins. Full term twins and infants weighing more than 2500g. had fewer low one minute Apgar scores than the preterm infants and those with low birth weight. Perinatal mortality (PNM) in the total series was 14.77% (A 12.50% and B17.05%). The most common cause of perinatal mortality was prematurity in 44.87%. The worst outcome was recorded for the age groups 15-19 and ${\geqq}$40, in which perinatal mortality were 50.00%, respectively. The perinatal mortality of both A and B infants was lowest in the group diagnosed early during antenatal care before delivery. On the basis of our findings, we wish to emphasize particularly the importance of the early diagnosis of twins.

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롱샹 성당의 설계 변형 과정 연구 (A Study on the Transformation in Design Process of Ronchamp Chapel)

  • 이정규
    • 건축역사연구
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    • 제8권1호
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    • pp.81-94
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    • 1999
  • This Study aims at searching the meanings in the creative process of Ronchamp chapel by analyzing the drawings of the site, plan, section and elevation in chronological order. The origins of his architectural creation are identifying with the site(memories of Acropolis), analogies of crab shell, air plane wing and hydraulic dams. The architect informed himself about the site ,the tradition of pilgrimage associated with the place, and its devotion to the Holy Virgin; he looked into the rituals of the Catholic religion, spoke with ecclesiastics; he studied and annotated a monograph devoted to the site of Ronchamp. Also ,the plan required that it be possible to collect rainwater, since such was rare on the hill. In the first design phase, overall conception of building was carried out in the sketches and drawings from June 1950 to November 1950. The second phase in the elaboration of the project was from January 1951(at which time preliminary project was presented to the Commission of Holy Art) to April 1953. The modifications made were in response to opinions expressed by the patrons. The building moved to east and gargoyle moved to west, then, the elevations of north and west were changed. He designed the artificial land and bell tower from the first phase even after the beginning of construction ,he wanted them to be built .But they were not constructed, so the outer space for rituals of religion had no tension. I concluded that Le Corbusier had gifted ability and efforts to create spontaneous birth(after incubation) of the whole work, and the execution of drawings itself. He devoted himself to accomplish the project in spite of the change in situation or by clients.

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여성의 피부미용관리 지식 및 행태와 관련요인 (Knowledge, Behavior, and related Factors of Skin Care of Women)

  • 김복희;남철현
    • 보건교육건강증진학회지
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    • 제15권1호
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    • pp.1-30
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    • 1998
  • A study on skin care was conducted in order to develop proper skin care program and disseminate the Information to the consumers. The study was performed from October 2, 1997 though April 30 1997 by using questionnaires. The subjects were 1,793 from lug cities of Seoul, Pusan and, and 800 from medium and small cities of Kyongsan, Kimchon, Mokpo and KimHae cities. All subjects were females over 20 years. 1. 64.3% of the subjects said that they chose the massage packs after considering their skin condition. 55.1% of the subjects said that they did not know the side effects of the massage packs. 2. 53.3% of the subjects reported that they knew the cause of acne. and 73.3% of the respondents reported that they knew the nature of their body classified by oriental medicine. 3. The average knowledge and attitude was 10.61 :t3.46%( who it is converted to percent, it is 53.1%). The upper limit was 18.9% and lower limit was 19.0%. 4. The factors which are under the influence on knowledge of skin care were the times of massage, education level, the height of subjects, disease of skin, age, the degree of fatty body, the hour of make-up(R2=0.137). 5. The factors which are under the influence on the times of massage were education level, the experience of skin side effect, the status of physic8I health and the birth place of the subjects(R2=0.139). 6. The main factors which had significant effect on the status of face skin health were the status of physical health, economic status, age, the side effect of skin cosmetic, and the hour of make-up(R2=0.140). 7. Finally, it is recommended that training package on side effect of cosmetics, massage, physical characteristics and proper way of make-ups, and the public should be educated on the above mentioned areas.

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ARM11 기반의 Baby Care System Platform 구현 (Implementation for Baby Care System Using ARM11)

  • 신효섭;이광현;김영길
    • 한국정보통신학회논문지
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    • 제15권3호
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    • pp.719-724
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    • 2011
  • 최근 대부분의 가정에서 자식을 하나만 나아서 기르는 저출산 시대가 왔다. 이에 따라 부모들은 태어나면서부터 아이에게 지대한 관심을 가지게 되고, 헬스케어(Healthcare) 분야가 새로운 성장산업으로 부상하면서 (베이비 케어)Baby Care에 대한 관심 또한 높아졌다. 지금까지의 Baby Care 제품은 식품, 목욕용품 그리고 의복 등에서 발전을 해 왔지만 유비쿼터스 컴퓨팅 환경의 발달과 헬스케어산업의 발달과 함께 Baby Care 전자 제품 개발이 이루어지고 있다. 유럽이나 미국 등에서는 유아를 다른 방에서 키운다. 이때 유아가 돌연사하는 현상이 종종 일어나는데 이를 예방하기 위해서 유아의 상태를 측정하고, 부모가 유아에게 떨어져 있어도 유아의 상태를 확인할 수 있는 Platform를 구현하였다. 본 논문에서는 기존의 라디오 주파수를 이용하여 데이터 저장 없이 부모의 실시간 관찰에 의해서만 판단했던 시스템을 고속의 ARM11 기반의 S3C6410 CPU를 이용하고, 무선 WI-FI(IEEE8.2.11)기술을 활용한 유아 돌연사 방지 Platform구현에 대한 연구를 진행하였다.

일제강점기의 통영인근지역 어업권 분쟁과 어업·수산업관련 협동조합 설립에 대한 역사적 고찰 (A Study on Relationship between Fishing Rights Conflict and Fisheries Cooperatives Establishment in Tongyeong during the Period of Japanese Colonial Rule)

  • 이동호
    • 수산경영론집
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    • 제46권1호
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    • pp.41-62
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    • 2015
  • Though the debate of the establishment time, place and characteristic of the first fisheries cooperatives in Korea has been existed, it is clear that they had been established in the neighborhood of Tongyeong during the period of Japanese colonial rule. But the objective, motive and historical background of the first fisheries cooperatives are still slightly vague. To explain and explore that of fisheries cooperatives, over 1,000 articles of media, about 100 document of the Japanese government-general of Korea and the annals of the Joseon dynasty, many of research paper and others were included and refined. Through the result of that process, three core factors were founded that affect both the emergence of fisheries cooperatives and relationship of the them. The first one is about the royal family's fishing area where in the neighborhood of Tongyeong. The next one is Kentaro Kashii who was called king or devil of the Korean fisheries industry and the last one is fishermen and their organizations including fisheries cooperatives. Some of the above and the fishing rights conflict that make a guidance for understanding them has not been clearly mentioned. The result of this study shows that the birth of the first fisheries cooperatives were caused by not only the Japanese government-general of Korea but mainly Korean fishermen's voluntary activity and free will against fishing rights conflict between them. And both of the first fisheries cooperatives had somewhat difference in their constitution of organization and their characteristics but it was a tragic irony that the more exploitation and despoliation were conducted by Japanese government-general and Japanese capitalist the more movement and activity of Korean were frequently and severely occurred. Even though the findings and results of this study would be a proof and helpful material for understanding the establishment and their activity of fisheries cooperatives in Tongyeong, more research and contribution would be need by members of fisheries academic and business world.

A Comparison of Obesity Prevalence between Korean-American Children and Korean Children

  • Sim Young-Ja;Kim Eun-Kyung;Park Kye-Wol;Kim Hee-Sun
    • Journal of Community Nutrition
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    • 제8권1호
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    • pp.31-37
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    • 2006
  • This study is to compare the prevalence of obesity between Korean-American children and Korean children, and to investigate the role of environmental factors in obesity development. Prevalence of child obesity is compared by their residence, parents' anthropometric data, education and occupation, and the length of immigration, and birth place of the children. A total of 593 children between the ages of 9 and 12 were examined. 262 Korean-American children (KcUS group) from New Jersey, USA and 331 Korean children (KcK group) from Seoul, Korea were compared. KcUS group showed a higher obesity rate (male: 12.6% and female: 8.2%), compared to KcK group (male: 8.0% and female: 5.1 %). KcK male children showed lower weight and prevalence of obesity than Korean-American male children who lived in the United States for more than three years. Korean-American female children had higher weight and obesity rate than Korean female children. Waist circumference and hip circumference were also higher in obese children in both KcK and KcUS groups. The children who live in America had an odds ratio of 1.69 to be obese compared to KcK, while those born in America and those who have lived in America for more than 3 years had odds ratios of 1.53 and 1.25 to be obese, respectively. This study found that environmental factors, immigration to America for instance, could playa bigger role in child obese development than the genetic factor.