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成煥泰 慶熙大學校 1983 論文集 Vol.12 No.-
Under machine elements. Gears are the most important element of power transmission. The more requisite of machinery heavy-loading, high speed, lightweight increased, which gears demand severe operating conditions. Gear design set a subject the most important of machine design, and connected with vibration, noise and environment matters, efficiency elevation of gears equipment was treated. The representative Gear strength formulas are AGMA formula of America, B.S. formula of England, DIN formula of Germary, JSME formula of Japan etc. In this paper introduces gear strength formula of each state, which compared and examined.
췌장암 환자에서 알코올 내장신경 신경파괴블럭 후 발생한 간염
이상은,최석환,김영환,임세훈,이정한,이근무,정순호,최영균,김영재,신치만 인제대학교 2008 仁濟醫學 Vol.29 No.-
Splanchnic neurolytic block(SNB) with alcohol improves the management of pancreatic cancer pain. Adverse effects of alcohol SNB which include regional pain, hypotension, diarrhea, and acute alcohol intoxication are common, but acute hepatitis caused by alcohol neurolytic block is rare. A 63-year-old patient with pancreatic head cancer and liver metastasis had complete pain relief after both retrocrural tansdiscal SNB with 100% alcohol 10 ml. But, 1 day later, liver function test showed a high elevation in the aspartate aminotransferase (AST, 2182 IU/L) and alanine aminotransferase (ALT, 1807 IU/L). The patient had slight jaundice, general weakness, chilling, nausea and vomiting after SNB. Both AST and ALT decreased to 46 and 119 IU/L within 10 days with only supportive therapy. But, 19 days later, the patient died due to pneumonia. Our case illustrates the importance of clinical surveillance especially in patient with hepatic disease after alcohol SNB.
Isonitrosoethylacetoacetate Imine 리간드의 니켈(II) 착물 합성 및 구조 특성
김인환,구본창,최강열,김상태,이만호 大邱大學校附設 基礎科學硏究所 1993 基礎科學硏究 Vol.10 No.-
Nickel(lI) Complexes of the type Ni(IEAA-NH)(IEAA-NR) (R = H₁, CH₃, C₂H_(5), n-C₃H_(7), n-C₄H_(9), or CH₂C_(6)H_(5)), where IEAA-NH and IEAA-NR represents isonitrosoethylacetoacetate imine and its N-alkyl derivative, respectively, have been prepared. And the structure of the complexes have been studied by elemental analyses, electronic, infrared,1H and 13C-NMR spectra. It has been determined that IEAA-NH ligand coordinates to nickel through the nitrogen of imine group and the oxygen of isonitroso group to form 6-membered chelate ring and IEAA-NR coordinates to nickel through the nitrogens of imino group and isonitroso group to form 5-membered chelate ring in the square-planar Ni(IEAA-NH)(IEAA-NR) complexes.
이중혈류유발 심폐소생술이 심정지를 유발한 개의 단기 생존율에 미치는 영향
황성오,조준휘,강구현,김성환,문중범,이강현,이승환,윤정한,최경훈,홍은석 대한응급의학회 2000 대한응급의학회지 Vol.11 No.3
Background and Objectives: We previously reported that, compared with standard cardiopulmonary resuscitation(S-CPR), better hemodynamic effects could be achieved by simultaneous sterno-thoracic cardiopulmonary resuscitation(SST-CPR) in which we compressed the sternum and constricted the thorax circumferentially during the systolic period by using a device. This study was designed to assess whether SST-CPR, compared with S-CPR, improve the survival rate of dogs with cardiac arrest. Subjects and methods: Twenty-five mongrel dogs(19∼31㎏) were enrolled in this study. After four minutes of ventricular fibrillation induced by an AC current, animals were randomized to resuscitate with either S-CPR(n=13) or SST-CPR(n=12). Epinephrine(1 ㎎) was injected into the right atrium every three minutes after the beginning of CPR. Defibrillation was attempted after 6 minutes of CPR. Standard advanced cardiac life support was started if defibrillation was not successful. Results: SST-CPR resulted in significantly(p<0.001) higher systolic arterial pressure(91±47 vs 47±24 ㎜ Hg), diastolic pressure(43±24 vs 17±10 ㎜ Hg), coronary perfusion pressure(35±25 vs 13±9㎜ Hg), and end tidal CO2 tension(9±4 vs 3±2 ㎜ Hg). Two of 13 animals(15 %) resuscitated with S-CPR and six of 12 animals(50%) resuscitated with SST-CPR survived until 12 hours after cardiac arrest(p<0.05). Donclusion: SST-CPR, compared with S-CPR, improves the short-term survival rate in canine cardiac arrest.
골분진과 섬유소 접합물을 이용한 두안면부 골결손의 치료
권성택,박양수,김진환 대한성형외과학회 1992 Archives of Plastic Surgery Vol.19 No.3
In the field of plastic surgery, various forms of craniofacial bone defects may be encountered under such conditions as trauma, congenieal defect, and postoperative condition. Until now, autogenous bone graft, processed homograft or heterograft, and alloplastic implants have been used for the reconstruction of those defecrs. Although each method has its own pros and cons, autogenous bone graft is most widely used because of its high survival rate, low postoperative complication rate, and longterm stability, Recently, the calvarium has become the favorite source of autogenous bone graft since it has many advantages. However, it is not easy to fabricate bone graft to fit in the defect accurately, paricularly for cystic or irregularly shaped depressions of craniofacial bone defects. In 1970, Shehadi reported the use of calvarial bone dust in reconstruction of cranial defects. Bone dust is harvested easily and in reasonably sufficient amount, but has not been used widely due to problems in fixation and survival rate. In our previous study, authors experimentally proved that a miture of fibrin sealant and autogenous bone dust plays an effective role to form a new bone in bone healing process. Fibrin controls bleeding, serves as a surface for adherence and degranulation of platelets, and accelerates would healing in general. In the healing process of bone grafting, fibrin trellis is known to contribute to osteoconduction and osteoinduction by supplying moving channels for undifferentiated mesechymal cells and bone morphogenic protein. Clinically, authors successfully treated 7 cases of craniofacial bony defects using bone dust and fibrin sealant and concluded as follows ; 1. Bone dust is easy to harvest in sufficient amount and is useful in reconstruction of various forms of bony defects. 2. Bone dust can be easily fixed when mixed with fibrin sealant. 3. Fibrin sealant stimulates bone union of bone dust graft. 4. Bone dust can also be harvested simultaneously when harvesting calvarial bone graft and be used in various craniofacial reconstruction as mixture with fibrin sealant.
曺炷煥,金成根 조선대학교 기초과학연구소 1994 自然科學硏究 Vol.17 No.1
The results from investigation for the physical, chemical and biological marine environments during the period from February 1989 to November 1990 in the Wando coastal areas are as follows: 1. The water temperature appeared high in proportion to a amount of diural sun rays and air temperature. 2. The salinity appeared differently every season by a amount of precipitation. 3. The distribution of pH was settled, and the degree of acidity apperared relatively high in the area where the river waters flows. 4. The dissolved oxygen was low in summer season, but high in winter. 5. The distribution of the chemical oxygen demand was distributed irregularly every season. 6. The suspended materials appeared remarkably high on St.1 in 1990. 7. The concentration of the phosphate-phosphorous is higher in river waters than in sea waters, and the phosphate-phosphorous in sea waters was mostly flowed from lands. 8. The concentration of the dissolved inorganic nitrogen appeared high in autumn when nitrite-nitrogen and nitrate-nitrogen is more concentrated. 9. The relative relationship between phosphate-phosphorous and dissolved inorganic nitrogen appeared higher comparatively in 1990 than in 1989. After all. our investigation suggests that the physical, chemical character brings about an abnormal variation of the marine ecosystem, and obstructs the birth and breeding of the submarine livings. Therefore, we must draw up divers shemes for the preservation of the quality of coast water, and concentrate our efforts on doing away with factors of all marine pollution which spread rapidly in proportion to the industrial development.
박성환,손진혁 聖潔大學校 社會科學硏究所 1999 社會科學硏究 Vol.6 No.1
ABSTRACT This Study has proposed marketing strategy of Korean hospital. 1. The general and common strategies needed by hospital in the field of management are to elevate the management efficiency by introducing the re-engineering to be adapted to the environmental change. 2. The medium and small hospitals shall be professionalized by the management strategy of professionalizing the functions based on the medical demand. 3. Marketing strategies are required to set up reliability and competitive power by satisfying the desire of the patients. 4. Successful hospital management need to construct patient-focused care system, improve hospital organization, and re-strategize patient-oriented hospital management.
高等學校 化學科 探究學習의 評價模型 定立과 評價紙 開發
李相協,吳岱燮,呂煥鎭,이병교 경북대학교 과학교육연구소 1983 科學敎育硏究誌 Vol.7 No.-
The current evaluation method of high school chemistry has been emphasized on knowledge. This fact does not satisfy the objective of learning due to lackness of the evaluation method about its inquiry ability and attitude. Therefore we introduce a evaluation model and its items about knowledge, inquiry ability and attitude in order to approach the objective of learning in hiph school chemistry. First, in order to evaluate knowledge of the students, we used the computer Managed Instruction (C.M.I) method which presents a stepwise knowledge of students. Second, for the evaluation of inquiry ability and attitude, we prepared the evaluation items about the contents of chemistry experiment according to an analysis of the objective learning. Thus we applied them to the students in a high school.