전파조정기를 이용한 마이크로파 소자용 Calibration

석은영,조현광,서영석,한교용 영남대학교 공업기술연구소 2000 工業技術硏究所論文集 Vol.28 No.1

A microwave device measurement tool kit using the TRL method for microwave tuner was developed. Teflon substrate was used for easy manufacturing. An adapter from CDI was used for the junction transition between microstrip and coaxial line. Mask production procedure which have the 3:1 reduction ratio was developed for microstrip transmission line manufacturing. Using these procedure the Cal Kit which can have Thru, Reflect, and Line was manufactured. TRL error correction method can be applied to the Kit. We tested the Cal kit and the error due to the microstrip line could be corrected. It can be applicable to the accurate measurement of microwave transistors.

최근 5년간 약진으로 입원한 환자의 고찰 - 임상양상 및 검사소견(1986∼1990) -

고우석,조광현,윤재일 大韓臨床藥理學會 1993 臨床藥理學會誌 Vol.1 No.1

인천국제공항 탑승동에 적용 가능한 적정 공조시스템에 관한 연구

석호태,정만석,김지현,여명석,김광우 대한건축학회 2005 대한건축학회논문집 Vol.21 No.1

Generally, indoor thermal environment control consumes much energy in the building Appropriate performance evaluation of the building and HVAC facilities are achieved by an energy simulation The result Which does the energy simulation of property HVAC system in airport Primary, there seems to be reasonable method which save window conduction loads and solar radiation loads on the element for an energy saving Secondly, According to the existence of contact outside in building Loads, the Important factor of influence is divided into solar radiation, window conduction loads and interior loads(lighting, equivalent, occupancy etc) The last, the result which does the energy simulation of each HVAC system, CAV + V AV System is determined profitably in energy performance

광통신을 위한 광다중화 방식

이광석,김현덕 진주산업대학교 1999 論文集 Vol.38 No.-

Wavelength division multiplexing is considered as a proper one to be used network application with high performance of application element related to the recent rapid development such as laser diod with narrow width of wave length, optical filter, separator and optical amplifier. Furthermore wavelength division multiplexing is now under the examination and expected to be used practical way sooner or later.

기관내 삽관이 어려웠던 폐동맥 sling을 동반한 기관협착 환아1예

염석란,신중호,신종환,이근,류일,현성열,진욱,김재광 대한응급의학회 2001 대한응급의학회지 Vol.12 No.4

Pulmonary arterial sling, a rare developmental vascular anomaly forms a sling around the distal trachea and the proximal right main bronchus, where it sometimes makes tracheo-bronchial stenosis. Tracheo-bronchial stenosis from pulmonary arterial sling may produce non-specific symptoms of stridor, noisy breathing, dyspnea, recurrent upper respiratory tract infection, chronic cough, and dysphagia. The diagnosis of this anomaly begins with a high index of suspicion because of the lack of pathognomonic finding on usual evaluation. In this case, initial difficult intubation makes us evaluate further. Other cases reported the diagnosis is established by imaging studies, usually MRI and angiography. But, when our case was evaluated, we used cervico-thoracic enhanced computered tomography and tracheal fluoroscopy. Up to now, tracheobronchial stenosis from vascular anomaly is a rare and challenging disorder with a poor prognosis. However, early exact diagnosis would make us perform the accurate surgical treatment and reduce the mortality and morbidity.

갑상선기능항진증성 근병증 1예

김진석,박현영,장혁,김요식,조광호 圓光大學校 醫科學硏究所 2005 圓光醫科學 Vol.20 No.2

ATM망에서의 음성 트래픽 전송

이광석,김현덕 진주산업대학교 2001 論文集 Vol.40 No.-

A future Asynchronous Transfer Mode(ATM) based network must be able to support a variety service widely. Therefore ATM is transport all types of traffic, including motion video, still image data and voice. The voice includes all traffic that is currently sent over a voice circuit in a conventional telephony network and does not include high quality audio coded at speeds greater than 64Kbps. In this paper, to overcomes the above problems, associated signaling interworking and architectural alternatives for transport of voice traffic over access ATM network and Non-ATM network is proposed. In the architectural alternatives, in order to provide a voice service over an ATM network, it is necessary to service classes and adaptation types. Therefore, in order to evaluate the alternative adaptation for voice service and structure of data, source clock recovery and detection of cell loss/miss insertion is discussed.

케토프로펜 로오숀의 약물동력학적 특성과 항염증작용

단현광,배준호,박은석,지상철 성균관대학교 약학연구소 1998 成均藥硏論文集 Vol.10 No.1

The pharmacokinetic properties and antiinflammatory activity of 3% ketoprofen lotion (ID-lotion), formulated with poloxamer 407, were evaluated using rats. For the pharmacokinetic study, the lotion, at the dose of 4.5㎎/㎏, was applied on the dorsal skin of rats and the drug concentration in plasma was determined using an HPLC method. As references, ketoprofen suspended in saline was administered orally, and E-lotion, which is a 3% ketoprofen lotion in the Japanese market, was applied transdermally. Following the transdermal application of ID-lotion and E-lotion, C_max were 316±22.3ng/㎖ and 163±12.2ng/㎖, respectively, at the same T_max of 2 hours postdose, while C_max and T_max after oral administration of the drug were 1,030±89.1ng/㎖ and 0.25 hours, respectively. The antiinflammatory activity of the two 3% ketoprofen lotions was evaluated with carrageenen-induced edema method after 50㎎ of the lotions was applied on the paw of rats. ID-lotion showed 67.6% inhibition of the edema formation, while E-lotion showed 34.7%. The calculated ED_50 after transdermal application of ID-lotion was 2.5㎎/㎏, while that after oral administration was 7.0 ㎎/㎏. Based on these results, the relative equiponderal availability of ID-lotion was 296% compared to the oral administration of ketoprofen.

분만 전·후 사료급여 형태가 젖소의 생산성에 미치는 영향

기광석,김현섭,이왕식,이현준,김상범,정하연,은정식,김용국 충남대학교 농업과학연구소 2007 농업과학연구 Vol.34 No.2

This experiment was carried out to protect drops of feed intake should be plural prepartum and postpartum to reduce metabolic diseases after calving to know how feeding systems, which is divided as a low quility, a high quility and total mixed rations(TMR), affects on postpartum productivity of Holistein cows. Three diets (low or high quality forage separately fed with concentrate and TMR containing high quality roughage) were fed to 21 cows from 3 weeks prepartum to 8 weeks postpartum to examine their effects on the productivity of cows. DM intakes was noticed significantly higher with TMR (17.11kg/day) than low- quality (13.48 kg/day) and high-quality forage (13.10kg/day). TDN and CP intakes were also higher with TMR compared to other experimental diets. Mean daily milk yield was non-significant among the cows fed different diets. Blood non-esterified fatty acids(NEFA) content was higher in cows fed low-quality or high-quality forage separately with concentrate compared with those fed TMR. The results concluded that TMR feeding to transitional cows is better than feeding the low or high quality forage separately for their health and productivity. 본 시험은 분만 전 3주부터 분만 후 3주까지 전환기라고 지칭되는 시기의 젖소들에 대한 대사적 변화를 최소화하기 위한 방법으로 사료 섭취량 저하를 방지하고 분만 후 대사성 질병의 발생을 줄이기 위한 목적으로 수행되어졌다. 대사성 질병에 관여하는 주요 요인으로는 건물섭취량, 혈중 glucose 함량, NEFA 함량, 반추위 환경, 면역 등인데, 분만 전·후 Holstein 젖소에 사료급여 형태를 조·농분리(저질 조사료와 양질 조사료 급여구) 및 TMR로 다르게 하였을 때 사료섭취량 변화와 혈중 NEFA 및 glucose 함량 변화를 측정하고 분만 후 젖소의 생산성에 미치는 영향을 구명하기 위하여 수행하였다. 처리별 사료건물 섭취량은 저질 조사료 조·농 분리, 양질조사료 조·농 분리, TMR 급여구에서 각각 13.48, 13.10, 17.11kg으로 TMR 급여구에서 유의성 있게 높았으며(P〈0.05), TDN 섭취량은 처리구별 각각 7.35, 7.19, 5.66kg으로 처리간에 차이가 없었다(P〉0.05). 신체충실지수(BCS)는 저질조사료구에서는 3.03이였으며, 양질 조사료구와 TMR 급여구에서는 각각 3.19, 3.16이었다. 분만후 1주부터 5주까지 측정한 평균 산유량은 저질조사료 조·농 분리, 양질 조사료 조·농 분리, TMR 급여구에서 각각 34.1, 35.1, 35.6kg 였으며, 분만 후 4∼5주에 최고 비유기에 달했다. 처리별 평균 유지율은 저질 조사료 조·농 분리, 양질 조사료 조·농 분리, TMR 급여구에서 각각 3.74, 3.68, 3.95%였다. 혈청내 NEFA 함량은 저질 조사료 조·농 분리, 양질 조사료 조·농 분리, TMR 급여구에서 각각 744.4, 381.8,266.7μEq/L로 처리간에 큰 차이를 보여 양질 조사료 급여와 TMR 급여시 혈중 NEFA 함량이 저질 조사료 급여에 이해 유의성 있게 낮았다(P〈0.05). 혈청내 glucose함량은 저질조사료 및 양질 조사료 조·농 분리, TMR 급여구에서 각각 39.3, 56.3, 62.4mg/dl로 양질 조사료 급여와 TMR 급여시 혈중 glucose 함량이 저질 조사료급여에 비해 유의성 있게 높았다(P〈0.05). 이상의 결과들을 종합해 볼 때, 분만 전 3주부터 분만 후 3주까지의 전환기 동안 사료섭취량 증가와 대사성 질병의 지표로서 혈중 NEFA 및glucose 함량 변화를 살펴 본 결과 분만 전 3주부터는 양질의 조사료나 TMR 형태로 급여하는 것이 사료섭취량 증가와 대사성 질병의 발생을 감소시킬 수 있을 것으로 사료되었다.

교내 현직연수 개선에 관한 연구

신현석,안종광 고려대학교 교육문제연구소 1998 敎育問題硏究 Vol.10 No.-