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        • KCI등재
        • KCI우수등재

          측쇄에 전 방향족 올리고 아미드를 가지는 고분자의 합성 및 그 열적 성질

          전승범,박원호,하완식,Jeon, Seung-Beom,Park, Won-Ho,Ha, Wan-Sik 한국섬유공학회 1988 한국섬유공학회지 Vol.25 No.1

          New polymers which have wholly aromatic oligoamides as side chains were synthesized. Poly(N-phenyl acrylamide) (PPA) and poly(N-acryloyl-$\rho$-aminobenzanilide) (PBA) were prepared by the reaction of poly(acrylor chloride) with aniline and $\rho$-aminobenzanilide, respectively. The thermal properties of both polymers were examined by differnetial scanning calorimetry and thermogravimetry. It was found that PPA and PBA were in partly crystalline form, but no melting point could be detected. The Thermal property of the polymers was superior to that of poly(acrylic acid).

        • SCOPUSKCI등재

          습식화학 방법에 의한 안정화된 $ZrO_2$의 제조 및 특성에 대한 연구

          전승범,변수일 한국세라믹학회 1979 한국세라믹학회지 Vol.16 No.3

          This study was to explore the characteristics of 6 mole% CaO stabilized $ZrO_2$ prepared by wet chemical methods. The results of the experiments were as follows: 1. The powder calcined at 1000$^{\circ}$-110$0^{\circ}C$ was partly agglomerated. The morphology of agglomerate was spherical of 0.5-1$\mu{m}$ in size for Hot Petroleum Drying Method, chain-like of 1-2$\mu{m}$ for Freeze Drying Method, and irreqular of 2-3$\mu{m}$ for Coprecipitation Method. 2. Optimum calcining conditions for powder prepared by wet chemical methods were found: 110$0^{\circ}C$, 2h in air for Hot Petroleum Drying Method and Freeze Drying Method, and 100$0^{\circ}C$, 2h in air for Coprecipitation Method. 3. When specimen was calcined at 1000$^{\circ}$-110$0^{\circ}C$ in air for 2h and then sintered at 1$600^{\circ}C$ in air for 4h, the specimens prepared by wet chemical methods showed a high sintered density (94% of theoretical density) and a low open porosity (<0.8%); however, the sintered density of the specimen prepared by Oxide Wet Mixing Method was 90%. 4. The amount of cubic phase of sintered body prepared by wet chemical methods was observed to be higher than the one prepared by Oxide Wet Mixing Method. 5. It was found that Hot petroleum Drying Method, Freeze Drying Method and Coprecipitation Method were nearly the same in respect of the results of stabilization grade and sintered density of CaO-stabilized $ZrO_2$.

        • WLAN용 SiGe HBT MMIC 가변이득 증폭기 설계 및 제작

          전승범,김창우 慶熙大學校 레이저 工學硏究所 2002 레이저공학 Vol.13 No.-

          A SiGe HBT variable-gain amplifier(VGA) has been designed and fabricated for Wireless LAN systems. The VGA circuit is based on a Gilbert Cell structure which has good linearity. Design result of the amplifier exhibits a 20.5 dB maximum gain, over 40 dB of gain-control range and fabrication result exhibits a 8.2 dB maximum gain, over 47 dB of gain-control range in 5.15 ∼ 5.35 GHz band. The gain varies linearly as the gain-control voltage varies from O to 3 V.

        • KCI등재
        • KCI등재

          불안 민감성과 부적 정서가 걱정에 미치는 영향

          전승범(Jun, Seungbum),김은정(Kim, Eunjung) 한국청소년정책연구원 2016 한국청소년연구 Vol.27 No.4

          본 연구에서는 불안 민감성과 부적 정서가 걱정에 미치는 영향을 지각된 위협과 불안 통제감이 매개하는지를 검증하였다. 이를 위해 대학생 294명을 대상으로 그들의 걱정 수준과 불안 민감성, 부적정서, 지각된 위협, 불안 통제감의 정도를 측정하였다. 그리고 불안 민감성과 부적 정서가 걱정에 미치는 영향을 지각된 위협과 불안 통제감이 완전 또는 부분 매개 하는지에 따라 네 가지 형태의 연구모형을 설정하고 각각의 모형에 대해 구조 방정식 모형 검증을 수행하여 각 모형의 적합도 정도를 확인하였으며, 연구 모형들 중 가장 자료에 적합한 모형을 찾기 위해 연구 모형들 간의 χ²(df)차이 검증을 수행하였다. 그 결과, 불안 민감성과 부적 정서가 지각된 위협과 불안 민감성을 순차적으로 거쳐 걱정에 영향을 주는 간접 경로와 부적 정서가 걱정에 직접적으로 영향을 주는 직접 경로를 포함한 모형이 자료를 가장 잘 설명하는 것으로 확인되었다. 보다 자세히 살펴보면, 불안 민감성과 걱정 증상과의 관계는 지각된 위협의 하위 요인인 가능성 평가와 불안 통제감에 의해 완전 매개되는 것으로 나타났다. 그리고 부적 정서와 걱정 증상 간의 관계는 지각된 위협의 하위 요인인 가능성 평가와 대가평가 그리고 불안 통제감에 의해 부분 매개되는 것으로 밝혀졌다. 이러한 결과를 중심으로 본 연구의 시사점과 제한점 및 후속 연구에 대한 제안을 논의하였다. The purpose of this study was to investigate and understand how worry occurs and is maintained. The study examined the mediating effects of perceived threat (;PT consists of probability estimates and cost estimates) and anxiety control in relationships between anxiety related variables (i.e., anxiety sensitivity, negative affect) and worry. For the purposes of this study, structural equation modeling analyses, using data from 294 university students was performed. The results indicated that the relationship between anxiety sensitivity and worry was fully mediated by probability estimates and anxiety control. Moreover, the influence of negative affect on worry was partially mediated by probability estimates, cost estimates, and anxiety control. Finally, the implications and limitations of this study and suggestions for future study were discussed.

        • KCI등재
        • KCI등재
        • KCI등재

          The Concentration of Tartrate Resistant Acid Phosphatase in Synovial Fluid of Canine Stifle Joint

          이해,알람,최성진,박상렬,이영훈,전승,최익혁,김남수,Lee Hae-beom,Alam Md.Rafiqul,Choi Sung-jin,Park Sang-youel,Lee Young-hoon,Chon Seung-ki,Choi In-hyuk,Kim Nam-soo The Korean Society of Veterinary Clinics 2005 한국임상수의학회지 Vol.22 No.3

          본 연구에서는 십자인대 손상견의 무릎관절액의 TRAP의 농도와 비교 할 수 있는 정상 관절액의 TRAP 농도의 지표를 제시 하기 위하여, 정상 무릎 관절액의 TRAP의 농도를 측정하였다. 십자인대 손상이 없는 23두 건강한 잡종견(14두 노령견과 9두 성견)을 실험견으로 선택하고 성별, 나이, 몸무게로 구별하였다. 무릎 관절액을 채취 한뒤, Lang method로 관절액의 TRAP을 측정하였다. 측정된 TRAP의 농도를 성별, 나이, 몸무게 등으로 구별하여 $Mean{\pm}SD$로 표시 하였으며, 유의성 차이를 T-test로 구별하였다. 노령견(14두, 2년이상) TRAP의 농도는 $0.083{\pm}0.039\;IU/ml(mean{\pm}SD$, 성견(9두, 2년 이하) $0.064{\pm}0.023\;IU/ml$, 대형견(15두, >22 kg) $0.075{\pm}0.028\;IU/ml$, 소형견(8두, <22 kg) $0.076{\pm}0.046\;IU/ml$, 중성화견(15두) $0.085{\pm}0.036\;IU/ml$, 중성화 되지 않은견(8두) $0.056{\pm}0.022\;IU/ml\;(Mean{\pm}SD)$로 나타났으며, 중성화 견과 중성화 되지 않은 견에서만 유의성 있는 차이 (P<0.05)가 보였다. 본 연구의 정상견에서 TRAP 농도는 십자인대의 손상견과 비교할수 있는 지표로 활용할 수 있을 것으로 사료된다. The concentration of tartrate resistant acid phosphatase (TRAP) in synovial fluid of normal stifle joint was investigated in order to establish a baseline data to distinguish between healthy joint and joint with injury of cranial cruciate ligament (CCL). Twenty three mixed-breed healthy dogs free from joint diseases (fourteen adult and nine young) were used in this study. The dogs were sedated and synovial fluid was collected from the femoropatellar compartment of stifle joints by direct arthrocentesis. The concentration of TRAP in synovial fluid was determined using the method of Lang. The concentration of TRAP were $0.083{\pm}0.039$ IU/ml in adult dogs, $0.064{\pm}0.023$ IU/ml in young dogs, $0.075{\pm}0.028$ IU/ml in large dogs (>22 kg), $0.076{\pm}0.046$ IU/ml in small dogs (<22 kg), $0.085{\pm}0.036$ IU/ml in neutered dogs and $0.056{\pm}0.022$ IU/ml in intact dogs. The concentration of TRAP in the neutered dogs was significantly (p<0.05) higher than the intact dogs. This data can be used baseline data for a comparison with joint with injury of cranial cruciate ligament.

        • KCI등재

          실험적 담도폐색에 의한 혈액화학치의 변화

          이해,이병곤,전승,김남수,Lee, Hae-Beom,Lee, Byung-Gon,Chon, Seung-Ki,Kim, Nam-Soo 한국임상수의학회 2008 한국임상수의학회지 Vol.25 No.5

          The aim of this study was to establish an experiment animal model for easy diagnosis and monitoring effect of treatment of cholelithiasis by cholesterol and mixed gall stone. In 12 adult beagle dogs, five dogs there were in the control group and seven dogs in the experiment group with ligated cystic duct. General clinical signs were recorded, CBC and blood chemistry were examined. Control group and experiment group were evaluated every 2 weeks for a period of 20 weeks. The results were (1) Total blirubin, cholesterol, alanine aminotransferase (ALT), aspartate aminotransferase (AST) activity were significantly higher in the experiment group with ligated cystic duct than control group during 2-8 weeks. (2) Total alkaline phosphatase (TALP) activity was significantly higher when compare with control group during 2-8 weeks. Bone alkaline phosphatase(BALP) activity was increased slightly between 2 and 8 weeks but was decreased between 10 and 20 weeks. (3) Blood urea nitrogen (BUN) was decreased between 2 and 8 weeks. After 10 weeks, this was in normal range. (4) On complate blood count (CBC), $Ca^{2+}$ and P were not changed until 20 weeks. (5) On clinical signs in experimental group, they observed a depression, yellow color of mucus membrane and conjunctiva, xanthinuria and xanthochromic. The present study showed that the experimental animal model with ligated cystic duct was a useful model to study biliary tract disease.

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