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        • SCOPUSKCI등재

          우선방위를 갖는 Pb(Zr, Ti)$\textrm{O}_3$ 박막의 강유전체 특성에 관한 연구

          고가연,박진성,이종국,이은구,우선,이재갑,Go, Ga-Yeon,Park, Jin-Seong,Lee, Jong-Guk,Lee, Eun-Gu,Lee, U-Seon,Lee, Jae-Gap 한국재료학회 1997 한국재료학회지 Vol.7 No.8

          (111)과 (100)우선방위의 정방정계의 Pb(Zr$_{0.2}$, Ti$_{0.8}$)O$_{3}$박막의 강유전체 특성과 신뢰성특성을 상부 전극의 두께를 변화시키면서 연구하였다. (111)우선방위의 박막이 (100)우선방위의 박막보다 큰 잔류분극과 항전계 값을 갖고 있어 정방형의 이력곡선 특성을 보여주었다. 스위칭전하의 상부전극의 두께 의존성은 상부전극을 열처리 할 때 유도되는 압축응력에 의한 stress효과로 설명할 수 있었다. 상부전극의 두께가 얇은 박막은 초기에는 작은 스위칭 전하를 갖고 있으나 스위칭 횟수가 증대됨에 따라 기계적인 응력의 감소로 인하여 부분 수위칭 영역이 확대되어 내구성이 향상되었다.

        • KCI등재

          Efficient isolation of intact RNA from the soft coral Scleronephthya gracillimum (Küenthal) for gene expression analyses

          우선,Seungshic Yum,윤문근,Sa Heung Kim,Jongrak Lee,Jeong Ha Kim,Taek-Kyun Lee 한국통합생물학회 2005 Animal cells and systems Vol.9 No.4

          A rapid, simple and efficient method to extract RNA from the adult polyps of a soft coral, marine cnidarian, Scleronephthya gracillimum (Kkenthal), was developed in this study. The highest yield and purity of RNA was obtained with the lysis solution containing 35 mM EDTA, 0.7 M LiCl, 7.0% SDS, and 200 mM Tris-Cl (pH 9.0). Approximately 40 g of total RNA was extracted from 200 mg of liquid nitrogen-pulverized polyp tissue. The ratio of absorbance at 260 nm and 280 nm ranged from 1.8 to 2.0. The results of the reverse transcription polymerase chain reaction (RT-PCR) with -actin gene specific primers and Northern blot analysis using the same gene probe revealed that the RNA extracted by our method had high quality, and was sufficient for subsequent molecular biological analyses. This method was effective for RNA extraction from other soft coral species which belong to the genus Dendronephthya.

        • KCI등재

          연구논문 : 기후변화를 고려한 김해시의 지역별 확률강우강도식 개발

          우선봉 ( Sun Bong Woo ),박종길 ( Jong Gil Park ),최선호 ( Sun Ho Choi ),윤종성 ( Jong Sung Yoon ) 한국환경과학회 2014 한국환경과학회지 Vol.23 No.11

          The regional rainfall intensity formula for Gimhae in Gyeongsangnam-do province is developed in this study. The nine points of rainfall observations were selected. In order to demonstrate the accuracy and the versatility of the proposed rainfall intensity formula, three regions under the jurisdiction of the Meteorological Agency near Gimhae, namely Busan, Changwon, Miryang observatories were selected. The present formula can be effectively employed for various design of hydraulic structures in Gimhae area since it is divided into several refined regions.

        • KCI등재

          Characteristics of High-intent Suicide Attempters Admitted to Emergency Departments

          우선,이상원,이광훈,서완석,이종훈,김희철,원승희 대한의학회 2018 Journal of Korean medical science Vol.33 No.41

          Background: The suicide rate in Korea has been the highest among the Organization for Economic Cooperation and Development countries since 2003. However, there is a lack of in-depth data regarding the characteristics of suicide attempters. Understanding the intent of suicide attempters will help improve the effectiveness of suicide prevention strategies. Therefore, to provide a resource for developing the necessary interventions, this study aimed to examine the differences in suicide-related and clinical variables according to the strength of suicidal intent. Methods: The subjects were 328 suicide attempters admitted to emergency departments at 5 university hospitals in Daegu-Gyeongbuk province between 2011 and 2014. We used various scales to examine suicide-related and clinical variables and a structured questionnaire to explore psychosocial characteristics. We evaluated suicidal intent using the Pierce Suicide Intent Scale and a clinician-rated scale that measured suicidal authenticity. Results: Individuals with high suicidal intent were significantly older, had higher Hamilton Depression Rating Scale (HDRS) scores, higher rates of premeditation, and sustained suicidal ideation. Furthermore, suicide methods, timing, and psychiatric treatment histories differed by the strength of subjects' suicidal intent. Moreover, multiple logistic regression showed that depressed mood as a reason for attempting suicide, premeditation, and higher HDRS scores were significantly associated with higher suicidal intent. Conclusion: Depression, premeditation, older age, and sustained suicidal ideation were characteristics of individuals with high suicidal intent, and it is necessary to evaluate and monitor these factors to prevent repeated suicide attempts.

        • KCI등재

          Molecular Cloning of the Translation Elongation Factor 1A (eEF1A) Gene from the Soft Coral, Scleronephthya gracillimum (Kukenthal) and Implication on Cnidarian Phylogeny

          우선,윤문근,서동상,송준임,김정하,염승식 한국유전학회 2004 Genes & Genomics Vol.26 No.4

          The complete cDNA of eukaryotic translation elongation factor 1A (eEF1A) from the soft coral Scleronephthya gracillimum (Kükenthal) (Alcyonacea, Octocorallia, Anthozoa, Cnidaria) was cloned by RT-PCR and the nucleotide sequences were determined. The information on primary structure of the eEF1A gene and protein may be useful for the gene expression study as well as for the phylogenetic study. The full-length cDNA of S. gracillimum eEF1A comprised 1612 bp, not including the poly (A)+ stretch, and contained a complete open reading frame encoding 461 amino acids. The deduced amino acid sequence showed 85% identity to placozoan, 86% to human and 77% to hydra. Considering that functional domains are highly conserved throughout the evolutionary history, the present study suggests that the amino acid sequence of eEF1A alone may not resolve the phylogenetic relationship of lower metazoans. A possible solution to overcome the long branch problems that appear in cnidiarian phylogeny is discussed.

        • SCOPUSKCI등재

          여성 골다공증의 위험요인에 관한 환자-대조군 연구 - 서울지역 1개 병원 내원환자를 중심으로 -

          우선,배상수,김동현,Woo, Sun-Ok,Bae, Sang-Soo,Kim, Dong-Hyun 대한예방의학회 1995 Journal of Preventive Medicine and Public Health Vol.28 No.3

          Until now there are few available epidemiologic data of osteoporosis in Korea, and the severity of osteoporosis-related health problem has not been widely recognized yet. But the numbers of the old people are increasing in Korea, and in 2000, the proportion of people over 65 will be up to about 6.8% of total population. Therefore, osteoporosis, one of the most common metabolic bone disease among the old people, will be one of the most important public health problem. On this background this study was performed to find out risk factors of the development of osteoporosis in Korean women through case-control approach. The subject of this study were selected among the women who visited menopause clinic in one general hospital in Seoul and were checked bone density from Sep. 1988 to Sep. 1993. Those who were diagnosed to have hypertension, diabetes mellitus, thyroid disease, breast disease, or liver disease, which are thought to influnce bone density, were excluded. Also excluded those who are age-unknown. Finally the subjects were 2,139 women aged between 18 and 79. We operatively defined patient group as those whose bone density is below $1.039/cm^2$, 90% of average bone density of women of 4th decade who visited the same hospital. And we defined control group as whose bone dendity is above $1.15g/cm^2$. We randomly selected 201 women from the patient group and 202 from the control. As independent variables we chose age, menarche age, menopause age, menopause type, the number of siblings, the number of pregnancies, body mass index, taking oral pill or not, feeding type, and educational state. Multiple logistic regression analysis was done to see the influence of these variables on the risk of osteoporosis. Results are as follows; 1. menopausal status was statistically significant risk factor to all women irrespective of her age, while obesity and later menopause age were found to be statistically significant protective factors. 2. The more siblings and pregnancies, the greater tile risk of osteoporosis, but these factors were not statistically significant. This result is not consistent with other studies. Further studies are strongly needed.

        • 온라인 쇼핑에서 희소성메시지가 구매의도에 미치는 영향 : 사용후기 방향성의 조절역할

          우선연 ( Sunyeon Woo ),박철 ( Cheol Park ) 고려대학교 세종경영연구소 2020 경상논집 Vol.40 No.1

          희소성 메시지는 판매 가능한 제품의 수량이나 시간을 제한하여 그 제품에 대한 가치를 향상시킴으로써 소비자의 제품 구매의지를 증가시키는 메시지 소구법의 하나이다. 본 연구에서는 제품을 구매할 수 있는 수량을 제한하는 수량한정 희소성 메시지와 제품을 구매할 수 있는 시간을 제한하는 시간한정 희소성 메시지에 대한 두가지 희소성 메시지 형태를 통해 온라인에서의 소비자의 구매의도에 미치는 영향을 연구하였다. 이를 위해 실제로 사용되고 있는 시간한정 메시지, 수량한정 메시지, 사용 후기를 자극물로 설정하였으며, 실험 설계를 통하여 희소성 메시지가 주어졌을 때, 주어지지 않았을 때를 구분하여 사용후기의 방향성이 구매의도에 어떻게 영향을 미치는지 살펴보았다. 희소성 메시지의 유무에 따라, 희소성 메시지 유형에 따라, 사용후기의 방향성에 따라 2x2x3의 집단 간 실험설계를 하였다. 연구 결과를 통해 희소성 메시지의 유무에 따라, 희소성 메시지의 유형에 따라 구매의도가 달라지는 것을 확인하였으며, 조절변수로 사용후기의 방향성을 제시하여 이에 따라 구매의도가 달라지는 것도 확인하여 가설이 모두 채택되었다. 이상의 결과에 비추어 볼 때, 본 연구는 희소성 메시지가 소비자의 반응에 미치는 긍정적인 효과가 그 유무에 따라, 유형에 따라 달라질 수 있다는 것을 확인함으로써 희소성 메시지를 더욱 구체적으로 이해할 수 있었다는 시사점을 갖는다. 또한 이와 같은 결과는 온라인에서 희소성 메시지를 통하여 광고 마케팅을 하고 있거나 시도하려는 기업들에게 희소성 메시지에 대한 이해도를 높여주고, 효과적인 사용 후기 관리에 대한 시사점을 제공해 준다. The scarcity message is one of the message appeals that increase the consumer's willingness to purchase a product by limiting the quantity or time of the product that can be sold and improving the value of the product. In this study, the effect of two types of scarcity messages on the quantity limited and time-limited. A experiment was designed including time-limited messages, quantity-limited messages, and online reviews that are actually used were set as stimuli. According to the presence or absence of a scarcity message, the type of scarcity message, and the direction(valence) of the reviews, a 2x2x3 group experiment was designed. As results, the purchase intention varies according to the presence or absence of a scarcity message and the type of scarcity message, and the purchase intention changed accordingly by presenting the direction of the reviews as a control variable. This study has implications that the scarcity message could be understood more specifically by confirming that the positive effect of the scarcity message on the consumer's response can vary depending on the presence or absence of it and depending on the type. In addition, these results enhance the understanding of scarcity messages and provide implications for effective testimonial management to companies that are doing or attempting to market advertisements through scarcity messages online.

        • 도시와 농촌아동의 죽음개념과 죽음불안 비교

          우선향(Woo, Seon Hyang),김정남(Kim, Chung Nam) 계명대학교 간호과학연구소 2011 계명간호과학 Vol.15 No.2

          '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.

          Purpose: This Study was to investigate 5th grade students' recognition of concepts of death(causality, cessation, irreversibility, inevitability) and the death anxiety(fear of death of self, fear of dying of self, fear of death of others, fear of dying of others) and to find out the correlation between the concept of death and the death anxiety among the students' in urban and rural areas. Methods: From September 1st to September 12th of 2008, 305 of 5th grade students from urban elementary schools and 195 of 5th grade students from rural elementary schools(total of 500 students) were interviewed with ready prepared questionnaires. The data were analysed by SPSS 14.0. Results: First, There was no significant difference between the urban and rural 5th grade students on the general concept of death and death anxiety. Second, The student's degree of recognition on the death as the concept of cessation was lowest(F=5.155, p=.006), and rural student's was higher than urban student's(1.59 vs 1.35). Third, The important variable was sex(t= - 4.888, p=.000). The girls' degree of death anxiety in general and subcategory of all were higher than boys'. Conclusion: The development and application of proper death education program based on the result of this study was recommended.

        • KCI등재
        • CO₂ 흡착속도 및 활성탄의 표면분석 연구

          우선향(Woo, Sun-Hyang),김완수(Kim, Wan-Soo),유홍진(Yoo Hong Jin) 한국산학기술학회 2008 한국산학기술학회 학술대회 Vol.- No.-

          본 논문에서는 CO₂ 분리용 활성탄의 표면분석 및 흡착속도를 비교하였다. TGA 방법에 의한 흡착속도 데이터를 획득함으로써 분리장치 설계를 위한 기초자료를 획득하였고, 흡착온도에 따른 결과는 흡착온도가 낮을수록, 흡착량이 증가하고 흡착속도 또한 더 빠름을 알 수 있었다.

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