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精密測定 計器用 Stainless Steel의 諸性質에 미치는 熱處理의 影響
金善泰,安幸根,韓泰鍾 Natural Science Research Institute JEONJU UNIVERSI 1987 전주대학교 자연과학연구소 학술논문집 Vol.2 No.2
The changes of microstructure and hardness with the various heat treatments on the properties of Fe-13.36% Cr-0.37%C stainless steel for precision measuring gauge have been investigated. Type 420 stainless steel has the self-hardenability, because the nose of isothermal transformation diagram located greatly to the right. The highest hradness in the martensite martrix with undissolved carbide is obtained by oil and air cooling treatment after austenizing at 1000-1050℃, for 1/6-1/3hr. In case of low temperature tempering, internal stress is reduced without dissolution of martensite matrix, and hardness reduced slightly. In case of high temperature tempering, hardness is reduced greatly, because the martensite matrix is dissolved into a ferrite and carbide.
기관내관 소독방법 개선에 따른 간호업무 시간단축 및 비용 절감 효과
이행선,김해리나,김은숙,김보람,성선숙 한국의료QA학회 2008 한국의료질향상학회지 Vol.14 No.1
Background: The purposeof innercannula is to protect the upperair wayand permitair to pass freely, in addition, to provideendotrachealsuction, artificial respiration and to maintain adequate oxygensaturation. The tubeneeds to be sterilizedformaintenanceand cleannessof air wayand forprevention of bronchospasm. However, it has been reportedthat there is no guideline forsterilization and manyhospitalsconducttheirown sterilization methods, forexample, oncea day(13's generalhospital), three timesa day(TheCatholic University of Korea STMary's hospital) or evenno cleansing. Consequently, the QI team of our hospitalsuggested the SOP(standard operatingprocedure) of sterilization and evaluate cost and timeeffect in nursing. Method: 1) Benchmarking of 13's neurosurgery departmentof generalhospital in Seoul 2) Investigation of test recordsof sputumculture from patientswith intubation for tracheotomy 3) Checkof resultsof 02 Sat. monitoring to confirm of maintainingopenedair way Result : 1) Improvement of process: decrease of excess sterilization of inner cannula (from 3 timesa day to oncea day) 2) Costeffects: saving over10 million wonper oneyear 3) Providing better nursing: time effects (30 mina day) permit to conductmorenursing activities Conclusion: Itcan get Costand timeeffectsin nursing withimproved sterilization methodof innercannula It needs to do researchon improvement of the monthly exchangeprotocol of outercannula and providesupportingdata forthe properexchangeschedule. The resultof additionalmicroorganism detection frompatients withnewprocessneeds to be evaluated furthermore.
김장수,조선행,김형균 韓國實科敎育硏究學會 2002 實科敎育硏究 Vol.8 No.1
The purpose of this study was to examine educational effectiveness for the classroom horticulture program that can be utilized in the culture domain of practical arts in elementary school. The subjects in this study were students in two sixth grade class of elementary school. The statistical technique used for the academic achievement were percentage and t-test. The findings of this study were as follows: (1) when the two class were compared with each other after experiment, the experiment class were significantly better in cognitive achievement than the control class; (2) the culture skill achievement of the experiment class students was higher than that of control class students; (3) most students of the experiment class responded that the classroom horticulture program was very enjoyable and attractive. A summarized above, It was found that the classroom horticulture program for the academic achievement by the elementary school students in practical arts was more effective than the conventional one.
김진숙,한영실,유선미,김행란,전혜경 한국조리과학회 2003 한국식품조리과학회지 Vol.19 No.3
깨다식의 감미 및 물성 등의 개선을 위해 꿀보다 높은 점도와 hardness를 가지는 쌀엿과 조청 등을 첨가 혼합하여 품질을 조사한 결과를 요약하면 다음과 같다. 깨다식의 적정 재료 배합비는 깨가루 100 기준시, 꿀과 쌀엿의 동량 혼합액 50%(w/w)였으며, 이를 기준으로 제조한 깨다식의 이화학적 특성은 당도 17.44 brix˚, tnqns 12.16, 환원당 15.44, 단백질 12.88, 지방 32.02, 조회분 2.82 %이었고, 기계적 특성 중 TPA의 chewiness는 0.28~0.30, hardness는 27.22~27.44 g/㎠이고, 색도의 L값은 41.67, a값 4.58, 그리고 b값은 16.99였다. This study was carried out to investigate the effects of the addition of sweeteners to Sesame Dasiks. Sesame Dasiks were prepared by adding various sweeteners to sesame seeds powder, at 40, 50, 60 and 70%, and their quality characteristics were measured. In the chewiness and hardness analyses of Sesame Dasiks, the 50% group (the same ratio and mixture of honey and lire jelIy) gave the highest results. For the sweetness, taste and overall acceptability of the Sesame Dasiks, the 50% group was also the better The texture profile analyses found the optimal chewiness and hardness of the Sesame Dasik to be 0.28 ~ 0.30 and 27.22 ~ 27.44, respectively.
Electromagnetic Penetration into an Annular Aperture in a Thick Conductor
Haeng-Seon Lee 한국전자파학회JEES 2005 Journal of Electromagnetic Engineering and Science Vol.5 No.3
Electromagnetic penetration into an annular aperture in a thick conducting plane is investigated with the integral transform and eigen-function expansion method. The solution is analytic and is represented in rapidly-convergent series which is amenable to numerical analysis. Numerical computations shows that apertures with narrow annular gap have sharp transmit power peaks in frequency response.
Headache without Cerebrospinal Fluid Leakage
Haeng-Seon Shim,Sung-Il Bae,Seung-Won Choi,Chang-Jin Oh,Myoung-Keun Shin 대한임상노인의학회 2013 대한임상노인의학회지 Vol.14 No.2
요부 경막외 차단후 두통이 발생 할 수 있다. 두통의 원인으로는 저혈압, 경막 천자후 두통, 혈관 주입, 지주막하 출혈과 기뇌증 등이 있다. 본 증례는 63세 된 남자 환자에게 공기를 이용한 저항소실법으로 경막외 차단을 시행하는 도중에 신경학적 증상없이 극심한 두통을 호소한 경우를 보고하고자 한다. 뇌척수액 누출이 없었기 때문에 경막 차단후 두통은 배제하였다. 뇌단층 전산화촬영을 시행하여 기뇌증으로 진단 되어졌다. 적절한 치료후 환자는 회복되었고 입원 4일 만에 퇴원하였다. Headache can occur after a lumbar epidural block. There are several reasons for the development of headache such as hypotension, postdural puncture, vascular injection, subarachnoid hemorrhage and pneumocephalus. We report a case of a 63-year-old male patient who developed a severe headache without neurologic symptoms after a lumbar epidural block with the loss of resistance technique (LORT) using air. We excluded the possibility of postdural puncture headache because there was no cerebrospinal fluid (CSF) leakage. Brain CT was performed and it revealed pneumocephalus. After conservative treatment, the patient recovered and was discharged on the fourth day of hospitalization.