UWB시스템용 초광대역 통과 필터 설계

임재현,김은정,김학선 한밭대학교 정보통신전문대학원 2004 정보통신전문대학원 논문집 Vol.2 No.1

본 논문에서는 UWB (Ultra-WidrBand)시스템에 사용되는 초광대역 통과 필터를 설계하였다. 고역 통과 필터와 저역 통과 필터를 직렬 연결하여 구현하였다. 10.6 GHz의 cut off주파수를 갖는 저역 통과 필터는 단락된 전송선로와 개방된 전송선로를 이용 하여 구현하였고, 3.1 GHz의 cut of주파수를 갖는 고역 통과 필터는 L과 C의 lumped소자를 이용하였다. 시뮬레이션 결과 통과 대역에서는 S11 값이 18 dB의 값을 얻었으며 두개의 cut off 주파수에서는 S21의 값이 10 dB 감쇄한 결과를 얻었다. In this paper, it was designed ultra-wide band pass filter for UWB(Ultra-Wide Band) system. There was inplemented series connection of high pass filter and low pass filter. Low pass filter accessed cut off frequency of 10.6GHz was designed using short-circuited stubs and open-circuited stubs. High pass filter assessed cut off frequency of 3.1GHz was designed using lumped elements of L and C. Simulation results were obtained 18 dB of S11 from pass band and attenuated 10dB of S21 from two cut off frequencies.

교내 실내 공기에서 부유 미생물의 분포

박창은,임미소,이다은,김설아,강재원 남서울대학교 2010 남서울대학교 논문집 Vol.16 No.2

The pathogenic and non-pathogenic microorganism have been isolated from the indoor airborne, the closest environment of human beings. Our purpose were to investigate the distribution of fungi and bacteria in indoor airborne sampled from 7 locations in Namseoul University for 2 months from September to October, 2010. The isolated bacteria were identified by Gram stain and biochemical test using VITEKTM system, also The fungus were identified by LPCB. The experiment on microorganism concentration of indoor air carried out and the average of total microorganism was measured. When airborne bacteria were isolated and identified. The isolation rates of Gram positive cocci, Gram positive bacilli, Gram negative bacilli, and Gram negative cocci were 38.3%, 22.4%, 2.7%, 0%, respectively. In Gram positive cocci, the most strains were identified as Micrococcus spp. In Gram positive bacilli, the most strains were identified as Bacillus spp. The frequently isolated fungi were Aspergillus sp, Penicillium sp, Alternaria sp, Rhizopus sp, Mucor sp. respectively. Further systematic studies are necessary with an emphasis on species identification. Key Words : Microorganism, Fungus, Indoor Airborne, Micrococcus, Aspergillus

제약업종 부산물 및 화장품 제조업 폐수처리오니 처리토양에 대한 유기화합물 및 Bioassay 분석 평가

임동규,이상범,이승환,남재작,나영은,권장식,권순익,소규호 한국환경농학회 2004 한국환경농학회지 Vol.23 No.4

본 연구는 퇴비원료로 지정된 제약업종 부산물(공정오니) 및 화장품 제조업 폐수처리오니를 퇴비로서 활용 가능성을 판단하기 위하여 기존의 일반성분이나 중금속 성분 분석 이외 유기성 화합물과 기타 여러 생물검정법 등을 활용하여 시용한 오니에 의한 토양 내 비료의 피해를 밝혀내고 이들의 평가방법을 확립하고자 포장시험을 수행하였다. 오니의 처리에 따른 HEM의 함량은 제약업종 오니2(PS2)와 화장품 오니(CS)처리가 각각 0.51, 1.10 mg/kg로 가장 높았고, PAHs의 함량은 제약업종 오니2(PS2) 처리에서 3,406.8 μg/kg로 가장 높았다. 토양에 서식하는 미소동물의 밀도변화는 생육 중기(7월 23일) 및 수확기(10월 1일) 모두 제약오니2 및 돈분 처리구에서 가장 높았으며, 기타 처리구는 차이가 없이 아주 낮았다. 오니의 처리에 따른 세균 및 사상균의 균수는 제약업종 오니2처리에서 각각 736, 909 cfu/g로 가장 많았고, 화장품 오니도 각각 440, 236 cfu/g으로 다른 처리에 비해 많은 경향을 보였다. 제약오니 및 화장품오니 처리시 우점세균은 무비, 돈분처리에 비해 일정한 경향이 없었으나 3요소 처리보다 다양한 세균이 검출되었다. 오니의 처리에 따른 우점사상균은 무처리에 비해 제약업종 오니3와 화장품 오니처리에서 형태적 특징이 다른 콜로니가 검출되었으나 다른 처리는 비슷한 경향으로 종류 간에 큰 차이는 보이지 않았다. Microcosm test를 통하여 오니 처리 후 3개월이 경과한 토양의 오염정도를 평가한 결과는 제약업종 오니3과 화장품 오니처리는 약간 영향을 받아서 80~90% 생존하였으나, 제약업종 오니1처리는 처리 2주(14일) 이후에는 급격히 생존율이 떨어져서 4주 이후에는 10%만 생존하였다. 그러나 6개월이 경과한 토양에서는 지렁이의 생존율은 제약업종 오니1처리만 약간 영향을 받은 것으로 보였으며 다른 처리들은 전혀 영향을 받지 않았던 것으로 조사되었다. 유기성 오니의 퇴비원료로 활용은 비료관리법의 비료공정 규격 중 퇴비의 비고란에 "퇴비의 원료로 사용 가능한 물질과 사용 불가능한 물질'(별표1)에서 "희비의 원료 중 사전 분석검토 후 사용 가능한 원료에 대한 지정요령'에는 유기물과 중금속(8성분) 함량(건물증)과 제조공정 등을 검토하여 지정하고 있으나, 지정된 원료가 과연 회비원료로 적합한지 잘 알 수 없으며 또한 앞으로 현재의 퇴비원료 규정을 변경할 필요가 있을 경우를 대비하여 희비원료의 적합성 여부를 판별할 수 있는 방법의 개발이 필요하다. 따라서 퇴비원료로 이미 지정('02. 12. 31)된 제약오니 및 화장품 오니를 과량으로 토양에 시용한 후 유해 유기화합물, 미소동물, 미생물 및 생물학적(지렁이) 유해성 검정방법의 도입 가능성을 평가하기 위하여 고추를 재배한 포장에서 비료의 피해시험을 실시한 결과 유해 유기화합물과 생물학적(지렁이) 유해성 검정방법은 앞으로 연구를 통해서 보완할 경우 상당히 활용 가능성이 있는 좋은 평가방법인 것으로 생각된다. This study was conducted to assessment organic compound and bioassay (density of inhabited animal, fluctuation of predominant fungi, and survival ratio of earthworm) for finding damage on red pepper by heavily amount application of sludges in soil, which was treated with 3 pharmaceutical byproducts and a cosmetic industry wastewater sludge as raw materials of compost, and for establishing estimation method. HEM contents in the soil treated with pharmaceutical byproducts sludge2 (PS2) and cosmetic sludge (CS) were 0.51, 1.10 mg/kg respectively. PAHs content of PS2 treatment in the soil was 3406.8 ug/kg on July 8. In abundance of soil faunas, the pharmaceutical byproducts sludge2 treatment was the most highest. The next was decreased in the order of pig manure (PM) and the cosmetic sludge treatment. However the other pharmaceutical sludge treatments were remarkably reduced populations of soil inhabited animals. In upland soil treated with organic sludges, the numbers of bacteria and fungi of the pharmaceutical sludge treatment were 736, 909 cfu/g and those of the cosmetic sludge treatment were 440, 236 cfu/g, respectively. The pharmaceutical sludge treatments and the cosmetic sludge treatment in identification of predominant bacteria were not any tendency to compare with non fertilizer and pig manure treatments, but they had diverse bacteria than NPK treatment. In microcosm tests, the survival of the tiger earthworm in five soil samples was hardly affected against the soil of PSI (20%) after three months treated in the upland. But after six months, survival of PSI was 80%. At present, raw material of compost was authorized by contents of organic matter, heavy metal (8 elements), and product processing according to "The specified gist on possible materials of using after analysis and investigation among raw materials of compost", however, for preparing to change regulation of raw material of compost and for considering to possibility of application, this study was conducted to investigate toxic organic compound and bioassay methods using inhabited animal, fungi, and earthworm without current regulation.

관상동맥질환의 중증도와 혈중지질치 및 아포지단백과의 상관관계

임현주,황종현,류재근,정병천,조용근,채성철,전재은,박의현 慶北大學校 醫科大學 1997 慶北醫大誌 Vol.38 No.1

목적 : 관상동맥질환의 위험인자로서 혈청지질 및 혈장 지단백에 대한 관심이 높아지고 있고 또 아포지단백이 관상동맥 질환을 일으키는데 다른 지질보다 더 중요하다는 연구가 많이 발표되고 있으나 우리나라에서는 아포지단백에 대한 연구가 그리 많지 않은 편이다. 이에 저자등은 혈중지질치와 새로운 위험인자로 알려지고 있는 아포지단백치를 측정하고 이들과 관상동맥질환 중증도와의 상관 관계를 알아보았다. 대상 및 방법 : 관상동맥질환이 의심되어 관상동맥조영술을 실시한 69명의 환자를 대상으로 하였으며 12시간 이상 공복후 혈청을 채취하여 총콜레스테롤, 중성지방, HDL-콜레스테롤, 아포지단백 AI (ape AI), 아포지단백 B (ape B)를 측정하였다. 관상동맥조영상 50%이상의 협착이 있는 혈관의 수 (lesion number), 최대협착을 합한 값 (lesion score), 각 분절의 최대협착을 합한 값 (total score), 가장 심한 협착 값 (peak stenosis) 등으로 관상동맥 중증도를 알아본 다음 이들과 혈청지질치, 아포지단백과의 상관 관계를 비교해 보았다. 상관 관계는 Spearman's correlation coefficient를 구하였다. 결과 : 관상동맥질환의 중증도와 각 지질치 간의 상관 관계를 비교해 보았을때 lesion number와 관계있는 것은 연령 (r=0.2789), 중성지방치 (r=0.2829)이며 lesion score와 관계있는 것은 연령(r=0.2911), 중성지방치0 (r=0.3316), 총콜레스테롤과 HDL-콜레스테롤의 비 (r=0.2361), apo B 치(r=0.2759), apo AI과 apo B의 비 (-0.3154)로 나타났다. Total score는 연령 (r=0.3100), 총콜레스테롤치 (r=0.2452), 중성지방치 (r=0.3022), 총콜레스테롤과 HDL-콜레스테롤의 비 (r=0.2770), apo B치 (r=0.2927), apo AI과 apo B의 비 (r=-0.3408)와 연관이 있었고 peak stenosis는 중성지방 치(r=0.3305), ape B 치 (r=0.2968), apo AI과 apo B의 비 (r=-0.3977)와 관계가 있었다. 연령으로 조정하여 partial correlation을 좌면, 관상동맥조영술상 중증도는 중성지방치 (r=0.3408), apo B 치(r=0.2877), apo AI과 apo B의 비 (r=-0.3460)와 유의한 상관 관계가 있었다. 이중 ape AI과 ape B의 비는 lesion score (r=-0.2640), total score (r=-0.3057), peak stenosis (r=-0.3460)와 유의한 상관관계를 보였다. 결론 : 이상의 결과로 보아 apo B치 그리고 apo AI과 apo B의 비가 관상동맥 중증도의 예견인자로 다른 혈중 지질 치보다 더 유용하다는 것을 알 수 있었다. Objectives : Recently, it was reported that the measurements of apolipoprotein levels may be valuable in the clinical assessment of coronary artery disease severity. However there are a few reports regarding to the relationship between coronary artery disease severity and apolipoprotein levels in Korea. Thus, we measured serum lipid and apolipoprotein levels and studied the relationship between coronary artery disease severity and serum lipids and apolipoproteins levels. Subjects and Methods : The 69 patients who underwent coronary angiography to evaluate chest pain were subjected to this study. We measured the levels of serum cholesterol, triglycerides, HDL cholesterol, apolipoprotein AI(apo AI) and apolipoprotein B(Apo B) and measured the severity of coronary artery disease by lesion number, lesion score, total score and peak stenosis. Then, we studied the relationship between coronary artery disease severity and apolipoproteins and calculated the correlation coefficient. Results : The results were as follows. There are significant correlation(r=0.3) between age, triglycerides, apo B levels, apo AI/B ratio and coronary artery disease severity. In controlling for age, tyiglycerides, apo B levels and apo AI/B ratio shows significant correlation(r=0.3) with coronary artery disease severity. Especially, apo AI/B ratio shows significant correlation(r=0.3) with lesion number, total score and peak stenosis. Conclusion : These results suggest that the apo B levels and the ratio of apo AI/B can be used as significant independent predictor for coronary artery disease severity rather than other serum lipid levels.

터키안와 및 상부 종양의 임상적 고찰

임재현,하은주,이종수,이승재,박효일 대한신경외과학회 1993 Journal of Korean neurosurgical society Vol.22 No.2

Tumorous lesion of intra- and suprasellar area showed unique clinical pictures and also was very hazardous and difficult to remove surgically because of the surrounding important anatomical structures. Here, authors analyzed 28 confirmed tumor of this area during last two and half years retrospctively. Histopathologically, 28 cases were classified in 14 pituitary adenoma cased6 cases of non-functioning adenoma, 1 GH-secreting adenoma and 7 cases of prolactinoma), 7 craniopharyngioma cases, 3 meninigioma cases and each one case of germinoma, Rathke's cleft cyst, pituitary abscess and hamartoma. Sexual incidence was 6 : 22 in male vs female ratio. Twenty two cases were measured its diameter over 2cm and they extended to suprasellar area in all cases. Five cases of microadenoma were analyzed and they were all enclosed in sella turcica. Visual impairment was the most frequent and prominent clinical symptom. of which incidence was 78.57% (22 cases). The next frequent symptoms were headache and generalized lethargy. Diabetes insipidus was a presenting symptom in 4 cases and hydrocephalus was noted in 4 cases preoperatively. Surgical intervention was carried out in 23 cases, by the way, the performed type of surgery in 21 cases was a conventional transcranial frontotemporal(pterional) microsurgical method. Post-operatively, diabetes insipidus was complicated in 78.26 % and pituitary hypofunction was noted 34.78%. Two cases of intracranial hemorrhage was developed after surgery and one was died. Through 6 to 28 months follow up. 82.1 % of cases were improved in its clinical status including 7 cured cases.

경수손상 환자에서 연령에 따른 재활 치료의 효과

임재영,신형익,김규리,김동아,김지영,나인수,이은선 대한노인병학회 2002 대한노인병학회지 Vol.6 No.3

검지기 데이터를 활용한 연속교통류 특성분석

임재혁,박은미 목원대학교 건축도시연구센터 2003 建築·都市環境硏究 Vol.11 No.-

Since urban Freeway, plays a major function in the city's roadway network, comprehensive and analysis should be performed with volume, speed, occupancy data of the freeway. Row of traffic variables are collected in real-time from the detectors of the recently implemented ITS. And average speed or travel time are produced based on the data. However, there are many things to be desired in interpreting the data. In this context, this research aimed to adopt various methods for analising the detector data, to find out dynamic traffic flow characteristics, such as congestion occurrence point, congestion processing, shock-wave effect of upstream as well as macroscopic u-q-k relationships. It is expected that various analysis methods of detector data presented in this thesis should help the freeway traffic management center produce the more effective control strategies. Productions of the control strategies with the proposed analysis results remains further study.

실험실적 당뇨성 흰쥐에서 acetaminophen의 대사에 관한 연구

임은주,윤병재,윤병재,조희숙,김대재,최종원 경성대학교 환경문제연구소 2000 環境硏報 Vol.10 No.1

Acetaminophen is one of the most important drugs used for the treatment of mild to moderate pain when an anti-inflammatory effect is not necessary. Phenacetin, a prodrug that is metabolized to acetaminophen, is more toxic than its active metabolite and has no rational indications. In this study, we were observed activities of free radical generating enzymes, free radical scavenging enzymes and glutathione-related enzymes as well as detoxification mechanism of against acetaminophen-induced hepatotoxicity in STZ-induced hyperglycemic rat. Activities of cytochrome p450, cytochrome b5, aminopyrine demethylase and aniline hydroxylase were changed by the treatment acetaminophen in hyperglycemic rats. It was also observed that activities of conjugating enzymes as sulfotransferase and UDP-glucuronyltransferase was slightly changes against acetaminophen-induced in hyperglycemic rats. Acetaminophen results in the significantly decrease in the level of hepatic glutathione concentration and √-glutamylcysteon, synthetase activities in hyperglycemic rats. And, glutathine S-transferase, superoxide dismutase and glutathione peroxidase activities were significantly increased against acetaminophen-inducedas in hyperglycemic rats. Glutathione reductase and catalase were not affected for experimental state. Furthemore, acetaminophen highered serum alanine, aspartate aminotransferase, sorbitol dehydrogenase, √-glutamylpeptidase, alkaline phosphatase and lactate dehydrogenase activities in hyperglycemic rats. Key Words: Hepatotoxicity, D/M, Acetaminophen, Glutathione, Glutathlone S-transferase, √-glutamylcystein synthetase

일부 성장기 학생 혈중 연농도의 성별 및 연령별 분포

임재언,강은용,최병선,서지영,홍연표,장임원,박정덕 중앙대학교 의과대학 의과학연구소 2000 中央醫大誌 Vol.25 No.2

생체시료中 Morphine 및 Codeine의 분석

임미애,이종숙,김재균,박세연,성은연,구기서 內務部 國立科學搜査硏究所 1996 國立 科學 搜査 硏究所 年報 Vol.28 No.-