아연계 탈황제의 장기연속 반응성 연구

박노국,이종욱,이승철,이종대,류시옥,이태진 영남대학교 공업기술연구소 2000 工業技術硏究所論文集 Vol.28 No.2

The zinc titanate sorbents(ZTG40) were prepared and the tests for durability and attrition resistance were carried out to develop the highly effective desulfurization sorbents. In the attrition tests for ZTG40 the results showed that the attrition resistance was 94.08% and that the sulfur capacity was maintained above 15g S/100g sorbent throughout the 100-cycle test, its maximum being 23.05g S/100g sorbent. As compared to sorbents developed by the developed countries, ZTG40 showed superior performances. In the advanced countries 15g S/100g sorbent is a yardstick of excellency for the sulfur capacity of desulfurization sorbents. Therefore, ZTG40 developed in this study has the desirable physical and chemical properties for fluidized desulfurization of coal gases.

불안과 우울의 예언변인들에 대한 탐색 연구(Ⅱ) : 잠재적 불안과 우울집단을 중심으로

이진환,김태희 부산대학교 학생생활연구소 2000 硏究報 Vol.32 No.1

본 연구에서는 잠재적 불안과 우울집단을 예언하는 변인들을 탐색하였다. 전체 2286명의 응답자들(남자, 1074; 여자, 1212) 중에서 144명이 잠재적 불안집단으로 116명이 잠재적 우울집단으로 선별되었다. 잠재적 불안집단은 불안점수에서 SD 1.5 이상이고 우울점수에서 SD 1.5 이하인 응답자들로 구성되어 있으며, 잠재적 우울집단은 그 반대이다. 이렇게 함으로써, 본 연구에서는 (불안만을 가지거나 우울만을 가지는) 순수한 사례들만을 선별하였다. 불안과 우울을 포함하여 총 17개의 변인들이 측정되었다. 본 연구의 결과는 두 변인, 즉 주거형태와 불만/분노가 잠재적 불안집단을 예언하는 것으로 나타났고, 세 변인, 즉 주거형태, 불만/분노, 그리고 양육태도가 잠재적 우울집단을 예언하였다. 본 연구자들은 이와 같은 결과를 불안과 우울간의 관계에 초점을 두어 논의하였다. Focused on the groups of potential anxiety and derpession the present study explored the variables predicting anxiety and depression. By screening among total 2286 participants(Male, 1074; Female, 1212), we extracted potential anxiety group and potential depression group from total sample. The potential anxiety group consisted of 144 respondents of SD 1.5 or more scores on anxiety scale and SD 1.5 or less scores on depression scale and vise versa was true in 116 potential depression group members. Total 17 variables including anxiety and depression was measured in this study. The resualts found in this study are following: (1) In the potential anxiety group, the predicting variables of anxiety were two variables, dwelling type and anger. (2) In the potential depression group, the predicting variables of depression were three variables, dwelling type, anger, and parenting style. We discussed such results in terms of relationships between anxiety and depression especially focused implication of such results about 'common latent structures' of anxiety disorder and depession disorder.

혐기성 소화반응에서 Aeration 유무에 따른 수소가스 발생 변화

김태형,이명주,장현섭,황선진 경희대학교 2006 環境硏究 論文集 Vol.15 No.-

This study was proceeded to know affect of the aeration on the anaerobic digest reaction by operating the acid reactor and hydrogen reactor and take the aeration at the feeding period of sludge in hydrogen reactor. All experiments were conducted at 35℃ using mineral salts-gluco-se(20 g/L) medium. In the acid reactor, the methane gas production was lasted during the an-aerobic reaction period. In the hydrogen reactor, the hydrogen gas production was lasted during the 9 days, especially high production of hydrogen occurred in 6∼9 days. The initial production of methane gas in hydrogen reactor was limited by aeration which to deteriorate the activity of methanogen, but production of methane gas was increased after 12 days. At the time to produce the hydrogen gas in the anaerobic digestion, the aeration reduce the activity of metanogen which known as obligate anaerobes, the created hydrogen can't covert to methane gas and keep the high production of hydrogen. And we think that hydrogen reactor have to take the occasional aeration to keep production of hydrogen cause the long SRT induce the activation of metanogen.

최대 암에르고미터 운동 시 경험 유·무에 따른 척수 장애인의 환기역치 비교

김태수,김성수,윤성진,황부근,이동희,이강우 한국특수체육학회 2004 한국특수체육학회지 Vol.12 No.3

The purpose of this study was to determine the effect of state for training at the VT using other relative physical factors as like a VT-Sec, VT-VO2peak, VT/VO2peak%, VO2peak, VT-HRpeak, VT/HRpeak%, HRpeak, with individuals with spinal cord injuries. The participants were composed of 7 spinal cord injured wheelchair basketball athletes who are involved with regular activity, 5 spinal cord injured sedentaries who are not involved any regular activity. The statistical procedures used to the analysis were unpaired T-test. The results were as follows; First, the significant differences in VT-Sec, VO2peak were observed between 2 groups. Second, the validity of 44-72VT/V O2peak% and 56.78VT/HRpeak% is suggested as an alternative exercise intensity by individuals with all spinal cord injuries.

양극산화와 절연파괴로 형성한 Ti-6Al-7Nb 합금의 산화피막 특성 평가

윤수연,이호진,배태성,송광엽 大韓齒科器材學會 2003 대한치과재료학회지 Vol.30 No.3

This study was performed to investigate the surface properties of electrochemically oxidized Ti-6Al-7Nb by anodic spark deposition technique. Discs of titanium alloy Ti-6Al-lNb of 20 mm in diameter and 2 mm in thickness were polished sequentially from #300 to #1,000 emery paper. They were ultrasonically washed in ethyl alcohol and acetone for 5 min and dried in a desiccator. Ti-6Al-7Nb was anodized in an electrolytic solution that was dissolved calcium and phosphate in water. The electrolytic voltage was set in the range of 170-320 V and the current density was 30 mA/cm^2. The surface oxide film was characterized by X-ray diffractometer, scanning electron microscope (SEM) and X-ray photoemission spectroscopy (XPS). The results obtained were summarized as follows; The main crystal structure of the titanium oxide was anatase type as analyzed with thin-film X-ray diffractometery. The coatings were porous with Pore diameter of 1~4 ㎛. The diameter of micropores increased with increasing the spark forming voltage. The porous coatings showed the growth of cell structure and more compact texture with increasing the voltage. Ca/P ratio in coatings was increased with increasing the voltage.

개에서 발생한 신우신염 증례

유건우,이선희,임수정,박형진,김태신,송은식,송근호 忠南大學校 獸醫科大學 附設 動物醫科學硏究所 2009 動物醫科學硏究誌 Vol.16 No.1

A 6 years old Schunauzer dog (7.2kg, intact female) with history of hematuria for two days was referred to the Veterinary Medical Teaching Hospital of Chungnam National University. Complete blood cell count showed no significant abnormalities and serum chemistry profile showed increased phosphate profile. On urinanalysis, there was evidence of bacterial infection. On ultrasonographic evaluation, irregular renal contour and increased echogenecity, pelvic and uretral dilation, and thickening of urinary bladder wall were observed. Based on these finding, the dog was diagnosed as pyelonephritis. The dog was treated with antibiotics based on antimicrobial susceptibility test results, then successfully resolved after 8 weeks of treatment.

갑상선기능저하증 이환견에 대한 치료 증례

김혜원,이선희,임수정,박형진,김태신,송은식,송근호 忠南大學校 獸醫科大學 附設 動物醫科學硏究所 2009 動物醫科學硏究誌 Vol.16 No.1

A 10-year-old, male, poodle dog was referred to the Veterinary Medical Teaching Hospital of Chungnam National University because of continuous cough and cardiomegaly. Weight gain, lethargy, unwillingness to exercise and decreased activity was revealed on history. Obesty and alopecia was also observed on physical examination. Hypercholesterolemia and increased ALP was revealed on blood exam. So, evaluation of thyroid gland function was performed and cTSH concentration was increased. tT4 and fT4 concentrations was decreased. Results of a history, physical examination, blood exam, and thyroid gland fuction test support a diagnosis of hypothyroidism. Initial therapy with sodium levothyroxine was indicated. On 32 days after treatment of hypothyroidism, clinical signs was relieved and cTSH concentration was decreased, tT4 and fT4 concenctrations was increased.

탄산칼슘의 고온건식 탈황반응성 연구

박노국,유성구,서길수,이태진 영남대학교 공업기술연구소 2000 工業技術硏究所論文集 Vol.28 No.2

The sulfidation reaction of calcium carbonate to remove H2S were investigated. Expecially, the effect of polymorphs of calcium carbonate and reaction temperature on the sulfur capture were determined. It was found that calcination reaction of calcium carbonate were influenced by polymorphs of calcium carbonate. The calcination temperatures of aragonite were lower than those of other calcium carbonates. For the sulfidation of calcite with H2S, the effect of reaction temperature on the sulfur capture were not found. But in caes of vaterite and aragonite, the reaction temperature were found to have a significant effect on the sulfidation reaction. From in these results, optimum temperatures of sulfidation reaction using vaterite and aragonite were determined at 800∼850℃ and 750℃, respectively.

개 원발성 면역매개성 혈소판 감소증 증례

유찬,임수정,이선희,박형진,김태신,송은식,김덕환,송근호 忠南大學校 獸醫科大學 附設 動物醫科學硏究所 2009 動物醫科學硏究誌 Vol.16 No.1

A 13-year-old, castrated male, Maltese-dog was admitted to the Veterinary Medical Teaching Hospital of Chungnam National University with the history fo petechiae. On physical examination, she had petechiae and ecchymoses at her back, bilateral inguinal region, and inner part of ear pinna. CBC indicated neutrophilia and severe thrombocytopenia. A few platelets, no autoagglutination of RBC, and no spherocyte were observed. Coagulation profile demonstrated normal PT, and aPTT. No significant findings was not found on serum biochemical profile and electolytes test. FNA of a splenic mass which was found on the abdominal radiograph and sonograph demonstrated extramedullary hematopoiesis, Proteinuria was observed on urinarysis. Primary immune-mediated thrombocytopenia was diagnosed by ruling out of other underlying disease, severe thrombocytopenia, and response to immunosuppressive therapy. Prednisone and antibiotics were administered orally and parenterally, respectively. After altering prednisone to azathioprine, the number of platelets was recovered to normal range and petechiae and ecchymoses were improved.

Waveguide VCO using GaAs Gunn diode for FMCW radar at 94 ㎓

Jin-Ho Kim,Dong-Sik Ko,Yong-Hyun Baek,Sang-Jin Lee,Seok-Gyu Choi,Min Han,Tea-Jong Beak,Yeon-Sik Chae,Jin-Koo Rhee 대한전자공학회 2010 ICEIC:International Conference on Electronics, Inf Vol.1 No.1

In this paper, a 94 ㎓ waveguide voltage controlled oscillator (VCO) is designed and fabricated. We fabricated the waveguide VCO, which has a good linearity, low phase noise and high output power. The oscillating frequency is tuned by resonant disc and output power is optimized by back-short. A cavity, bias posts and a magic tee are designed to get good performances. The bandwidth is 1.015 ㎓ from 93.865 to 94.880 ㎓ and output power is from 11.15 to 12.46 ㏈m. It has 0.91 % of linearity in 415 ㎒ from 93.910 to 94.325 ㎓. Phase noise is -102.82 ㏈c/㏈ at 1 ㎒ offset.