• 정보관리학회지
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• 제33권2호
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• pp.103-133
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• 2016

최근 특허기술의 가치평가가 크게 강조되고 있으며, 특허의 피인용횟수는 특허기술 가치평가에 있어 중요한 척도이다. 본 연구에서는 국내 특허를 대상으로 피인용횟수에 영향을 주는 변수들을 도출하기 위하여 일반화 선형모형 회귀분석을 실시하였다. 총 12개의 변수를 형태적, 기술적 그리고 개념적 요인으로 분류하였고, 국내 의료기기 특허 14개의 분야에 적용하여 분석한 결과 출원인 국적, 출원인 유형, 발명자 수, 출원국가 수, IPC 수, 참고문헌 수, 서지결합도가 특허 피인용횟수에 유의미한 영향을 미치는 것으로 나타났다. 본 연구는 국내 실정에 적용 가능한 연구를 수행함으로써 국내 특허에 대한 인용분석 방법론에 있어서 실질적인 기초적 자료를 제공했다는데 의의가 있다.

• Applied Science and Convergence Technology
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• 제25권6호
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• pp.120-123
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• 2016

The rotor of a turbomolecular drag pump is generally made of an aluminum alloy. Its surface finish is affected by various processes that the rotor itself undergoes during the manufacturing phase. The impact of different surface finishes on the pumping performances of a turbomolecular pump has been mainly investigated by Sawada et al [1]. The present work aims to broaden the previous bibliographic study to the drag stages of a turbomolecular pump by testing the impact of different surface finishes on the compression ratio of the pump. Experimental tests have been made focusing on two processes: the corundum sandblasting and the glass microspheres shot-peening. Both the processes flatten and/or physically remove EDM melted spheres; in particular, blasted surfaces obtained by glass shot-peening are generally smoother than surfaces obtained by corundum sandblasting. In order to characterize the surface texture left by such processes, preliminary surface roughness measurements have been made on the drag rotor disks of several pumps. The experimental tests conducted on both sandblasted and shot-peened rotors confirms previous results obtained on the turbo stages by Sawada et al. [1], showing that the average roughness of the surface has an impact on the compression ratio of the pump; in particular, an increment in the surface roughness causes a corresponding increment in the compression ratio of the pump and vice versa. For the tested pumps, the higher surface roughness gives a factor of increment of about 2 on the measured hydrogen maximum compression ratio of the pump.

• 한국문헌정보학회지
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• 제33권1호
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• pp.67-86
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• 1999

연구자의 인용행위는 정태적 과정이기 보다는 인용자를 둘러싼 제 사회와의 상호작용에 의해 지식을 생산 재생산하고, 유통하는 역동적 과정으로 파악할 필요가 있다. 본 연구의 목적은 인용이 선행연구와의 관련성을 토대로 인용자의 연구논거를 확립하고, 설득하기 위한 보편적인 행위이지만 이러한 보편적인 인용행위를 수행하는 인용자의 다양한 인용환경적 맥락이 인용자의 인용동기에 영향을 미칠 것이라는 전제를 이론적으로 논의하기 위한 연구이다. 본 연구에서는 인용동기 관련 선행연구의 검토를 통해 일반적인 인용동기 요인으로서 (1) 실질적 동기 (2) 설득적 동기 (3) 형식적 동기 (4) 사회적 관계 동기를 도출하고, 이러한 일반적 인용동기에 영향을 미치는 인용환경요인으로서 (1) 인용자와 문헌 요인 (2) 사회문화적 환경 (3) 정보환경 (4) 국제적인 지식체제 환경을 제시하였다. 제시된 각각의 인용환경은 인용자를 둘러싼 별개적인 인용환경 범주로 파악하기 보다는, 서로 유기적인 관련성이라는 맥락에서 인용환경요인의 이론적 모형을 개발하고 인용이란 그 사회의 다양한 인용환경과 인용자와의 상호작용을 반영한 사회적 산물로서 이해되어져야 함을 제안하였다.

• 한국환경복원기술학회지
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• 제14권1호
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• pp.11-22
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• 2011

This study was established to build and suggest the Ecological Performance Standards for replaced wetlands as the mitigation strategies for the construction projects. The request performance and assessment factors and standards were derived by bibliographic review and verified by the field survey for the reference wetlands. And the weights for each factor were derived by AHP(Analytical Hierarchy Process) method. The results are as follows : 1) Assessment factors were induced by in-depth research of many wetland assessment models and benchmarks evaluated ecological functions. This study proposed final 12 assessment factors through ecological specialist and experts interviews added with literature analysis. 2) 10 natural wetlands were selected as Reference Wetlands as the measure to propose assessment factors and assessment criteria. Those reference wetlands are well-conserved inland natural wetlands classified to the one having worthy to conserve (grade "high") according to RAM(Rapid Assessment Method). Reference wetlands chosen by the study are Parksilji, Jeongyangji, Mulkubi, Bawineupkubi, Jilnalneup, Jinchonneup, Doomoso, Haepyung wetland, Whangjeong wetland, and Whapo wetland. The research developed assessment criteria for the performance assessment factors based on several explorations of the reference wetlands. 3) "Requiring performance" of replaced wetlands is defined as "to carry out similar or same ecological functions provided by natural wetlands", in overall. The detailed requiring performances are as follows; ${\bullet}$ to play a role of wildlife habitats ${\bullet}$ to have biological diversity ${\bullet}$ to connect with other ecosystems ${\bullet}$ to provide water environment to perform good ecological functions 4) The assessment factors for required performance are categorized by wildlife habitat function, biological diversity, connectivity of adjacent ecosystem, and water environment. Wildlife habitat category is consisted of wildlife habitat creation, size of replacement wetland, and site suitability. Biological diversity category contains the number of plant species, the number of wildlife species, and number of protected species as the sub-factors. Connectivity of adjacent ecosystem is comprised of wildlife corridor, green network and distance from other ecosystem. Finally, water environment make up with water quality, depth of water body, and shape of waterfront. 5) Finally, every assessment factors were verified and weighted by the AHP methods and the final standards were proposed. The weights of factors of requiring performance suggested as habitat (0.280), connectivity (0.261), diversity (0.260), hydraulic environment (0.199). And those of detailed sub-factors are site suitability (0.118), protected species (0.096), distance to neighbor ecosystem (0.093), habitat creating (0.091), green corridor (0.090) etc.

• Asian Pacific Journal of Cancer Prevention
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• 제15권2호
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• pp.847-853
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• 2014

There is a lot of debate on the relationship between vitamin D receptor polymorphisms and risk of breast cancer. Herein, we quantitatively analyzed the published case-control studies on this relationship by meta-analysis, performing a bibliographic search from Pubmed and CNKI up to July 31, 2013. The included case-control studies for Fok1, Bsm1, Taq1, Apa1, Cdx2 and Poly-A were 16, 19, 20, 10, 4, 6, respectively. Crude and adjusted odd ratios and 95% confidence intervals were calculated to present and compare the strength of any associations. The results of combined analyses indicated that Fok1, Bsm1, Apa1, Cdx2 and Poly-A were not significantly associated with the risk of breast cancer. In contrast, the tt genotype of Taq1 was a modest risk factor for breast cancer development (tt vs. TT: OR = 1.21, 95% CI: 1.01-1.44). To further confirm the above results, adjusted effects for the six polymorphisms were pooled based on adjusted ORs reported in the original studies. Adjusted ORs of Fok1, Apa1, Cdx2 and Poly-A were similar to the crude ORs. However, Bsm1 and Taq1 showed inconsistent results. For Bsm1, OR for BB vs. bb was 0.85, 95% CI: 0.74-0.98; for Taq1, OR for tt vs. TT was 1.03, 95% CI: 0.92-1.15, and not associated with risk. Subgroup analyses for crude ORs showed some association between Bsm1, Taq1 and breast cancer in Caucasians only, but for adjusted ORs, no associations were found. This meta-analysis suggests that the roles that Fok1, Apa1, Cdx2 and Poly-A polymorphisms play in breast cancer risk are negligible, with Bsm1 and Taq1 as possible exceptions. To be conservative, we still assumed that they may play a modest role in determining breast cancer risk. Further studies are needed to validate our findings.

• 한국콘텐츠학회논문지
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• 제21권4호
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• pp.50-59
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• 2021

본 연구는 2000년 이후 최근 20년간 우리나라 영어교육의 연구동향을 파악해보는 것을 목적으로 한다. 이를 위해 영어교육 관련 주요 학술지 12개를 선정하여 해당 기간 동안에 게재된 논문 7,329편의 서지정보를 수집하여 분석하였다. 분석 대상이 된 영어교육 학술지의 논문 게재 현황은 2000년대부터 2010년대 전반기까지 계속 증가하였다가 2010년대 후반기에 다소 감소하였다. 그리고 2010년대 후반기에 학술지별 논문 게재 수도 비슷해졌다. 이와 같은 결과는 양적인 측면에서 영어교육 학술지의 영향력이 전반적으로 감소하면서 평준화된 것이라고 볼 수 있다. 다음으로 논문의 영문 초록을 데이터로 잠재 디리클레 할당(LDA) 토픽 모델링을 적용한 결과 34개 토픽(주제)이 추출되었다. 영어교육 분야에서 많이 연구된 토픽은 교사, 단어, 문화/미디어, 문법 등이었다. 단어, 어휘, 평가 등의 주제는 독특한 키워드를 통해 나타났고, 학습자요인 관련하여 여러 토픽들이 나타나면서 영어교육 연구의 관심 주제가 되었다. 다음으로, 상승 및 하강 토픽을 분석한 결과 상승 토픽으로 질적 연구, 어휘, 학습자요인, 평가요소 등이 있었고, 하강 토픽으로 CALL, 언어, 교수, 문법 등이 있었다. 이런 연구 주제의 변화는 영어교육 분야의 연구 관심사가 정적인 연구 주제에서 데이터 중심적이고 동적인 연구 주제로 이동하고 있음을 보여주는 것이다.

• 대한한방내과학회지
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• 제18권2호
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• pp.268-295
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• 1997

Sweating is natural phenomenon necessary for the regulation of an individual's body-temperature. The secretion of sweat is mediated by a portion of our vegetative nervous system(the sympathetic nervous system). In some people, this system is working at a very high activity level, far higher than needed to keep a constant temperature. This condition is referred to as hyperhidrosis. Especially excessive sweating of the hands and the feet is palmoplantar hyperhidrosis or volar hyperhidrosis. This is by far the most distressing condition. It was founded that the first important cause of this was emotional factor. The hands are much more exposed in social and prefessional activities than any other part of our body. Many individuals with palmoplantar hyperhidrosis are limited in their choice of proffession, because unable to manipulate materials sensitive to humidity or reluctant to shake hands; some patients arrive to the point to avoid social contact. The occidental medical treatments for palmoplantar hyperhidrosis include application of topical agents(chemical antiperspirants such as aluminum chloride), iontophoresis(treatment with electrical current), or surgery(thoracic sympathectomy). It was reported that the most effective treatment was thoracic sympathectomy. So this study was started to find the easy and effective oriental medical treatments against the occidental medical treatments through the oriental medical literature. The occidental medical idea for palmoplantar hyperhidrosis is only limited in neurologic system, so surgery is the best treatment. But the oriental medical idea for palmoplantar hyperhidrosis is much wider, so the oriental medical causes and treatments for this are able to be veriety. And the oriental medical teatment is freely in treating the patients of palmoplantar hyperhidrosis, because entire idea including pulse, facial color, mental condition, constitution and other symptom exists in the oriental medicine. The results of a bibliographic study of causes and treatments for palmoplantar are as follows; 1. The main causes of pa1moplantar hyperhidrosis are heat in the stomach, damp-heat in the spleen and the stomach, insufficiency of the spleen-qi and the stomach-qi, deficiency of the spleen-yin and the stomach-yin, and the others are the stomach-cold syndrome, stasis of blood and dyspepsia in the stomach, disorder of the liver-qi, deficiency of the heart-yin and the kidney-yin, deficiency of the heart-yang and the kidney-yang, stagnated heat in the liver and the spleen, the lung channel-heat etc. 2. The main methods of medical treatments for palmoplantar hyperhidrosis are clearing out the stomach-heat, eliminating dampness and heat in the spleen and the stomach, invigorating the spleen-qi and the stomach-qi, reinforcing the spleen-yin and the stomach-yin, warming the stomach, relaxing the liver and alleviating of mental depression and tonifying the heart and the kidney etc. 3. The main prescriptions of palmoplantar hyperhidrosis are Taesihotang, Palmultang-kakam, Samyeongbaechusan, Chongbisan, Sasammaekmundongtang, the others are Leejungtang, Hwangkikonjungtang, Seungkitang, Boyumtang, Baekhotang, Chongsimyonjayum, Moyrosan, etc. 4. Local medicine for external use are liquid after boiling alum in water for about 1 or 2 hours, liquid after boiling alum and pueraria root in water and liquid after boiling stragalus root, pueraria root, ledebouriella root and schizonepeta in water, etc. 5. The methods of acupuncture therapy include invigorating Bokyru, Yumkuk and purgating Hapkouk, or invigorating Bokyru, Kihae and purgating Hapkouk, or steadying Hapkouk, Nokung.