슬관절 등속성 운동시 근골격 모델의 검증:실험 및 모의실험 연구 : 실험 및 모의실험 연구 An Experimental and Simulatio study

배태수,강성재,최경주,김신기,유재욱,진미령,문무성 대한정형외과연구학회 2003 대한정형외과연구학회지 Vol.6 No.2

비신경교종 1례

김재욱,이배혁,오일준,전경명 釜算慶南耳鼻咽喉科學會 1993 임상이비인후과 Vol.4 No.2

알코올 용매로부터 알콕사이드졸겔법에 의한 알루미나 미분말의 제조

김창은,이해욱,안용진,김배연 연세대학교 산업기술연구소 1989 논문집 Vol.21 No.1

Al(??)₃를 알코올 용매하에 아세틸아세톤과 반응시킨 후 부분가수분해 하여 alumina precusor sol을 얻었다. 생성된 졸의 특성을 알아보기 위하여 산의 농도에 따른 졸의 상태를 조사하였다. 또한 이 졸로부터 얻어진 분말은 각 온도별로 열처리하여 결정의 전이과정 및 각 온도에서의 결정상태 등을 조사하였다. 건조분말은 90℃에서 비정질로서 polymenc sol의 특성을 나타내었으며 900℃에서는 ? -Al₂O₃, 1050 ℃에서는 α- Al₂O₃의 단일상이 각각 관찰되었다. 또, 비정질분말과 α- Al₂O₃에서는 6배위한 Al을, 그리고 ??-Al₂O₃에서는 4배위한 Al을 각각 확인할 수 있었다. Alumina precusor sol was obtained by the reaction of Al(??)₃ and acetylacetone in the alcohol solvent followed by the partial hydrolysis. In order to investigate the characteristics of the obtained sol, the state of the sol with the concentration of the acid was investigated. The powders obtained from this sol were calcined at the various temperatures. The transition of crystals and crystal state were investigated at the various temperatures. The powders dried at 90 ℃ showed the characteristies of polymeric sol and at 900℃ showed ??-Al₂O₃, at 1050℃ showed the single phase of α-Al₂O₃.

광학활성 산화제인 Cobalt(Ⅲ) 착물과 라세미 ?? 간의 입체선택적 전자전달반응

이배욱,김복조,도명기 嶺南大學校 基礎科學硏究所 1995 基礎科學硏究 Vol.15 No.-

The effect of oxidant on the electron-transfer reaction of rac- ?? and optically active oxidants were examined. The optical purities of the product for the oxidants were increased in the order of ?? < ?? ∼ ?? < ??. This observation suggests that stereoselective ionic association and electron transfer reaction between complexes are strongly dependent upon geometric structure, orientation and charge of the oxidants.

FIDIC 계약조건과 국내계약조건의 클레임 관련조항 비교 연구

이동욱,김창학,이배호 중앙대학교 기술과학연구소 1998 기술과학연구소 논문집 Vol.28 No.-

본 연구는 건설시장 개방에 따른 표준계약조건을 정립하기 위해 FIDIC 제정 계약조건과 국내에서 계약조건으로 적용되는 관련법규의 내용을 문헌조사를 통해 비교ㆍ검토하였다. 국내계약조건은 공사관련 사항을 여러 법규에 산발적으로 규정하고 있어 비정형성을 보이고 있으며, 책임기준 또한 모호하며, FIDIC 조건과의 비교분석에서 알수 있듯이 세부적ㅇ니 면에서 많은 차이점을 보이고 있어 클레임의 발생가능성이 높음을 알 수 있었다. 또한 클레임과 분쟁의 처리절차에 있어서 국내계약조건은 클레임의 제기, 감리자의 책임과 권한, 클레임의 유효성 기준, 클레임의 처리절차에 대한 규정이 미비한 실정임을 알 수 있었다. 또한 FIDC 계약조건의 분석을 통하여 시공자가 제기할 수 있는 클레임 사항을 본 연구에서는 제시하고 있다. IN this study, with a purpose to establish the standard construction contract conditions, the FIDIC conditions of contract and the corresponding legal systems from the various domestic laws and regulations, used as the construction conditions, were compared. The study shows problems such as inconsistence and atypicality between current provisions and FIDIC contract. The possibility of claim occurrence in Korea construction market is significant. Through a comparison of domestic and foreign construction contract, the study presents that domestic contracts don't have provisions about procedure of submission, engineer's responsibility and authority, and effective procedure of claims. The study also presents technical considerations under the FIDIC Contract by Employer and Contractor.

남북한 산업 규격의 비교 연구

이상조,김욱배 연세대학교 통일연구원 2003 통일연구 Vol.7 No.2

The technological and industrial traits of North Korean today are very different with those of South Korea as politics, economy, culture of both Koreas are, which have been developed in respective ways during the last fifty years. Facing with today's many real activities for the interchange and the cooperation like the construction of railroads and industrial complexes, lack of the general understanding of dissimilarities in characteristics of both countries are making it difficult to accomplish joint objects. However, any examination about those problems has never been tried because of the lack of practical materials and data about the technology and the industry in the North. This paper addresses the analysis procedure and method of the difference of the national industrial standard between South and North Korea in order to understand the difference. We already investigated the hierarchical classifications, organization, regulative items before and the systematic analysis procedure including the comparative study of the national standard based on the characteristics of each standard and the guide table which can be used in the comparison of the standards are accomplished in this paper. Based on the suggested comparison procedure, we reported the difference of the standard in the area of mechanical industry as a result of the comparison of the standards of South and North Korea over 360.

Ultrastrong Graphene-Copper Core-Shell Wires for High-Performance Electrical Cables

Kim, Sang Jin,Shin, Dong Heon,Choi, Yong Seok,Rho, Hokyun,Park, Min,Moon, Byung Joon,Kim, Youngsoo,Lee, Seuoung-Ki,Lee, Dong Su,Kim, Tae-Wook,Lee, Sang Hyun,Kim, Keun Soo,Hong, Byung Hee,Bae, Sukang American Chemical Society 2018 ACS NANO Vol.12 No.3

<P>Recent development in mobile electronic devices and electric vehicles requires electrical wires with reduced weight as well as enhanced stability. In addition, since electric energy is mostly generated from power plants located far from its consuming places, mechanically stronger and higher electric power transmission cables are strongly demanded. However, there has been no alternative materials that can practically replace copper materials. Here, we report a method to prepare ultrastrong graphene fibers (GFs)-Cu core-shell wires with significantly enhanced electrical and mechanical properties. The core GFs are synthesized by chemical vapor deposition, followed by electroplating of Cu shells, where the large surface area of GFs in contact with Cu maximizes the mechanical toughness of the core-shell wires. At the same time, the unique electrical and thermal characteristics of graphene allow a ∼10 times higher current density limit, providing more efficient and reliable delivery of electrical energies through the GFs-Cu wires. We believe that our results would be useful to overcome the current limit in electrical wires and cables for lightweight, energy-saving, and high-power applications.</P> [FIG OMISSION]</BR>

Lower serum uric acid level predicts mortality in dialysis patients

Bae, Eunjin,Cho, Hyun-Jeong,Shin, Nara,Kim, Sun Moon,Yang, Seung Hee,Kim, Dong Ki,Kim, Yong-Lim,Kang, Shin-Wook,Yang, Chul Woo,Kim, Nam Ho,Kim, Yon Su,Lee, Hajeong Wolters Kluwer Health 2016 Medicine Vol.95 No.24

<▼1><P>Supplemental Digital Content is available in the text</P></▼1><▼2><P><B>Abstract</B></P><P>We evaluated the impact of serum uric acid (SUA) on mortality in patients with chronic dialysis. A total of 4132 adult patients on dialysis were enrolled prospectively between August 2008 and September 2014. Among them, we included 1738 patients who maintained dialysis for at least 3 months and had available SUA in the database. We categorized the time averaged-SUA (TA-SUA) into 5 groups: <5.5, 5.5–6.4, 6.5–7.4, 7.5–8.4, and ≥8.5 mg/dL. Cox regression analysis was used to calculate the hazard ratio (HR) of all-cause mortality according to SUA group. The mean TA-SUA level was slightly higher in men than in women. Patients with lower TA-SUA level tended to have lower body mass index (BMI), phosphorus, serum albumin level, higher proportion of diabetes mellitus (DM), and higher proportion of malnourishment on the subjective global assessment (SGA). During a median follow-up of 43.9 months, 206 patients died. Patients with the highest SUA had a similar risk to the middle 3 TA-SUA groups, but the lowest TA-SUA group had a significantly elevated HR for mortality. The lowest TA-SUA group was significantly associated with increased all-cause mortality (adjusted HR, 1.720; 95% confidence interval, 1.007–2.937; <I>P</I> = 0.047) even after adjusting for demographic, comorbid, nutritional covariables, and medication use that could affect SUA levels. This association was prominent in patients with well nourishment on the SGA, a preserved serum albumin level, a higher BMI, and concomitant DM although these parameters had no significant interaction in the TA-SUA-mortality relationship except DM. In conclusion, a lower TA-SUA level <5.5 mg/dL predicted all-cause mortality in patients with chronic dialysis.</P></▼2>

Positive Correlation between Androgen Receptor CAG Repeat Length and Metabolic Syndrome in a Korean Male Population

Kim, Jong Wook,Bae, Young Dae,Ahn, Sun Tae,Kim, Jin Wook,Kim, Je Jong,Moon, Du Geon Korean Society for Sexual Medicine and Andrology 2018 The World Journal of Men's Health Vol.36 No.1

<P><B>Purpose</B></P><P>In epidemiological studies, there are various associations of androgen receptor (AR) CAG with several diseases or phenotypes. However, the relationship between CAG repeat length and metabolic syndrome (MS) remains unclear, especially in Asian populations. This study was designed to evaluate the relationship between AR CAG repeat length polymorphism and MS in a Korean male population.</P><P><B>Materials and Methods</B></P><P>We explored the relationship between AR CAG repeat length polymorphism and MS in a Korean male population (n=337) from 2013 to 2014. AR CAG repeat were determined by microsatellite fragment sizing. Components of MS and laboratory data (lipid profile, fasting glucose, and glycated hemoglobin (HbA1c)) were analyzed with AR CAG repeat length.</P><P><B>Results</B></P><P>The mean AR CAG repeat length was 22.3±4.7. Sixty-nine men (20.5%) were diagnosed with MS. Men with MS showed significantly longer AR CAG repeat lengths compared with men without MS (26.2 <I>vs</I>. 21.4, p<0.001). With increasing CAG repeat, the number of components meeting the NCEP criteria increased significantly. AR CAG repeat length was associated significantly with high density lipoprotein (HDL), triglyceride, and HbA1c levels. In the multivariate analysis, CAG repeat length, waist circumference, and levels of HDL were independently associated with MS. (odds ratio (OR)=1.37, 1.19 and 0.90, p<0.001, 0.045, and 0.001, respectively).</P><P><B>Conclusions</B></P><P>AR CAG repeat length was associated with MS and laboratory test results, such as those for HDL, triglycerides, and HbA1c, in Korean males. Longer CAG repeat length was identified as a risk factor for MS in Korean males.</P>

Impact of Cardiorenal Anemia Syndrome on Short- and Long-Term Clinical Outcomes in Patients Hospitalized with Heart Failure

Kim, Chan Joon,Choi, Ik-Jun,Park, Hun-Jun,Kim, Tae Hoon,Kim, Pum-Joon,Chang, Kiyuk,Baek, Sang Hong,Chung, Wook Sung,Seung, Ki-Bae S. Karger AG 2016 Cardiorenal medicine Vol.6 No.4

<P>Background: Dysfunctional interplay between the heart and kidneys may lead to the development of anemia. The aim of this study was to evaluate the impact of cardiorenal anemia syndrome (CRAS) on short- and long-term outcomes among patients hospitalized with heart failure (HF). Methods: We enrolled 303 patients hospitalized with HF. We divided the patients into two groups: a CRAS group (n = 64) and a non-CRAS group (n = 239). We defined CRAS as HF accompanied by (1) an estimated glomerular filtration rate <60 ml/min/1.73 m(2) calculated by the Modification of Diet in Renal Disease at admission and (2) a hemoglobin level <12 g/dl for females and <13 g/dl for males at admission. The primary outcome was a composite of cardiac death, non-fatal myocardial infarction and rehospitalization for HF. Results: During a median follow-up period of 25.6 months (range 0.1-35.3 months), the patients with CRAS had a significantly increased risk for the primary outcome (27.5 vs. 10.7%, p < 0.001) compared with the patients in the non-CRAS group. Using Cox proportional hazard analyses, the hazard ratio (HR) for the presence of CRAS was found to be 1.874 (95% confidence interval [CI] 1.011-3.475, p = 0.046); HRs were also computed for the presence of diabetes mellitus (HR = 2.241, 95% CI 1.221-4.112, p = 0.009), New York Heart Association class III or IV HF (HR = 2.948, 95% CI 1.206-7.205, p = 0.018) and the use of intravenous loop diuretics (HR = 2.286, 95% CI 0.926-5.641, p = 0.073). Conclusions: Renal dysfunction and anemia are a fatal combination and are associated with poor prognosis in patients with HF. (C) 2016 S. Karger AG, Basel.</P>