• 한국콘텐츠학회논문지
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• 제20권3호
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• pp.687-694
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• 2020

스티로폼은 각종 포장용기, 장난감, 부표 등 일상에서 흔히 사용되는 소재 중 하나이며, 범죄현장에서 발견 될 가능성 또한 매우 높다. 하지만 스티로폼은 구조적인 특성으로 인해 지문이 거의 남지 않아 지문 현출 기법의 효과가 크지 않다. 선행연구에 따르면 스티로폼에서의 지문 현출 방법으로 주로 분말법이나 CA 훈증법(Cyanoacrylate fuming method)을 제시하고 있다. 본 연구에서는 분말법과 MMD I의 비교 실험을 통해 MMD I의 잠재지문 현출 효과를 알아보고자 하였다. 스티로폼에 지문을 유류한 뒤 1일, 3일, 5일, 1주, 2주, 3주 경과한 검체를 분말법과 MMD I을 적용한 결과, MMD I은 지문 aging 기간에 구애받지 않고 전반적으로 매우 우수한 현출 결과를 보인 반면 분말법은 오래된 지문일수록 현출되지 않았으며 신선한 지문에서도 매우 낮은 품질의 지문이 현출되었다. MMD I은 비용과 시간이 들고, 기법이 다소 어렵다는 단점이 존재한다. 하지만 MMD I이 스티로폼 표면의 신선한 지문과 오래된 지문을 현출하는데 매우 효과적인 것으로 나타났다.

• Journal of Korean Neurosurgical Society
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• 제46권6호
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• pp.558-563
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• 2009

Objective : Moyamoya disease (MMD) is an uncommon cerebrovascular disorder, characterized by progressive occlusion at the terminal portion of the internal carotid artery. Incidence of the disease is high in East Asia and familial MMD accounts for about 15% of the disease. Although the pathogenesis is unknown, association of HLA class I or II alleles with MMD has been reported with conflicting results. We investigated whether there is a difference in HLA class II association between familial and non-familial forms of the disease. Methods : A total of 70 Korean children with MMD, including 16 familial cases (10 probands), and 207 healthy controls were studied. Among familial cases, only 10 probands were used for the HLA frequency analysis. High resolution HLA-DRB1 and DQB1 genotyping was performed using polymerase chain reaction (PCR)-sequence specific oligonucleotide hybridization and PCR-single strand conformation polymorphism methods. Results : The phenotype frequencies of HLA-DRB1*1302 (70.0%) and DQB1*0609 (40.0%) were significantly increased in familial MMD compared to both controls [vs. 15.5%, corrected p ($p_c$) = 0.008, odds ratio (OR) = 12.76; vs. 4.3%, $p_c\;=\;0.02$, OR = 14.67] and non-familial MMD patients (vs. 14.8%, $p_c\;=\;0.02$, OR = 13.42; vs. 1.9%, $p_c\;=\;0.02$, OR = 35.33). The frequencies of DRB1 and DQB1 alleles in non-familial MMD patients were not significantly different from those in controls. Conclusion : Our findings suggest that the genetic polymorphism of HLA class II genes or other closely linked disease relevant gene(s) could be a genetic predisposing factor for familial MMD.

• Bulletin of the Korean Chemical Society
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• 제20권9호
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• pp.1040-1044
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• 1999

A micro porous PTFE membrane desolvator (MMD) was built and evaluated for the on-line removal of organic solvents to facilitate the determination of trace metal contaminants in the solvents by ICP-AES. Three organic solvents, isopropyl alcohol (IPA), methanol, and dimethy sulfoxide (DMSO) were studied. The MMD reduced organic solvent concentration in the sample aerosol stream by 82% to 89%, as indicated by monitoring C(I) emission. Net signal intensity of Fe, Al, and Cu was increasing with higher organic solvent concentration, with the rate of increase being solvent dependent. The signal intensities for Mg and Pb followed the trend with the C(I) signal. Changing the sweep gas flow rate affected the optimum signal intensity. Wine samples were analyzed by the method of standard addition. The concentrations of B, Al, and Mg were determined with a relative precision of less than 2.3%.

• 분석과학
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• 제33권2호
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• pp.108-114
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• 2020

Gloves are very important evidence at a crime scene; specifically, rubber gloves can be found easily at homes. Therefore, crime scene investigators attempt to develop fingerprints inside the rubber gloves that are discovered, for identifying unknown suspects. This study compared the effectiveness of three different methods that are used for developing latent prints on gloves with aging time. These were the powder, cyanoacrylate fuming, and multi-metal deposition I methods. The powder method achieved good results for 1-3 days of aged prints, and the cyanoacrylate fuming method worked well on 2-week-old prints. In comparison, multi-metal deposition I method developed good quality fingerprints for 6 weeks of aging time.

• 동의생리병리학회지
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• 제17권3호
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• pp.700-710
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• 2003

For the experiment of the effects between cadmium aerosol inhalation toxicity and ethyl acetate extracts of Folium Mori, 4 inhalation exposure groups of rat were exposed to cadmium aerosol in air by whole-body inhalation exposure for 6 hours/day, 5 days/week, and 4 weeks. Cadmium concentration in the air was 0.96㎎/㎥ and mass median diameter (MMD) was 2.48㎛ with 1.85 of geometric standard deviation(GSD). Intraperitoneal injections of ethyl acetate extracts of Folium Mori to inhalation exposure groups were performed for 4 weeks and the results were as follows: The highest body weight gain for 4 weeks and food intake per day were 159.29/4 weeks in treated group III and 18.45g/day in treated group I, respectively. The highest lung and liver weights were 1.31 g in treated group I and 9.42g in treated group III, respectively. The highest kidney weight was 2.21g from treated group I. The lowest cadmium content in lung was 86.39㎍/g from treated group III and the lowest cadmium concentration in blood was 2.72㎍/㎗ from treated group II. Cadmium concentrations of 22.09㎍/g in liver and 24.82㎍/g in kidney were the lowest from inhalation exposure group I and III, respectively. For weekly cadmium concentration in urine, the value of the fourth week from treated group III was the highest, 1.35㎍/㎖. For weekly cadmium concentration in feces, the values of the second and fourth week from treated group I were the highest, 1.11㎍/g. The highest metallothionein concentration in lung was 31.85㎍/g from treated group III and the highest metallothionein concentration in liver was 205.77㎍/g from treated group III. The highest metallothionein concentration in kidney was 206.55㎍/g from treated group III. The highest Hct and Hb values were 38.26% and 11.63g/㎗ from treated group III, respectively. The highest RBC and WBC values were 7.68×106/㎣ and 9.85×10³/㎣ from treated group I, respectively.

• 동의생리병리학회지
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• 제18권2호
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• pp.474-483
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• 2004

To know the effects between Cd inhalation toxicity and extract of Radix Achyranthis Bidentatae, 4 rat groups were exposed to Cd aerosol in air using whole-body inhalation exposure for 6 hours/day, 5 days/week, and 4 weeks. Cd concentration in air was 1.03㎎/㎥ and mass median diameter(MMD) was 1.69㎛. 3 different dose intraperitoneal injections of extract of Radix Achyranthis Bidentatae to 3 inhalation exposure groups was done for 4 weeks and the results were as follows: The highest body weight gain for 4 weeks and food intake per day were from inhalation exposure group I and the highest lung and liver weight were also from inhalation exposure group I. The highest kidney weight was from inhalation exposure group III. The lowest Cd content in lung was 33.49㎍/g from inhalation exposure group I. The lowest Cd concentration in blood was 9.36㎍/㎗ from inhalation exposure control. Cd concentrations of 40.02㎍/g in liver and 69.18㎍/g in kidney were the lowest from inhalation exposure group I and III, respectively. The lowest Cd concentration in liver was 21.08㎍/g from inhalation exposure group III and The lowest Cd concentration in kidney was 15.78㎍/g from inhalation exposure group II. For weekly Cd concentration in urine, the value of the fourth week from inhalation exposure group III was the highest. For weekly Cd concentration in feces, the value of the first week from inhalation exposure group III was the highest. The highest metallothionein concentration in lung was 53.42 ㎍/g from inhalation exposure group III and the highest metallothionein concentration in liver was 188.18㎍/g from inhalation exposure group III. The highest metallothionein concentration in kidney was 143.92㎍/g from inhalation exposure group III. The highest Hct, Hb, and WBC values were from inhalation exposure group II and the highest RBC value was from inhalation exposure group III.

• 품질경영학회지
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• 제21권1호
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• pp.161-170
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• 1993

This study attempts to present the linear regression analysis that involves more than one regressor variable, because regression analysis is the most widely used statistical technique for describing, predicting and estimating the relationships between given data. The model of multiple linear regression may be solved directly by the two linear programming methods, i.e., to minimize the sum of the absolute deviation (MSD) and to minimize the maximum deviation(MMD). In addition, some results was compared to each techniques for accuracy and tested to the validity of statistical meaning.

• 정보처리학회논문지C
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• 제9C권3호
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• pp.439-444
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• 2002

본 논문은 무선인터넷서되스의 기반기술인 무선CATV 시스템 방식중에 디지털 MMDS(Multipoint Multichannel Distribution System)의 시스템 파라미터에 따른 링크버짓 분석과 송신 출력과 변조방식에 따른 셀반경을 제시한다. 또한, 본 논문에서는 셀 분할에 따른 C/I와 가입자수를 제시한다. 본 논문에서, 디지털 MMDS의 시스템 파라미터에 따른 링크버짓 분석한 결과를 토대로 0dBW에서 -9dBW가지 송신출력과 QPSK, 16QAM, 그리고 64QAM 변조방식에 따라 구한 결과의 셀 반경은 최대 134km에서 최소 4.3km가지 가능했다 또한, 본 논문에서, 4섹터, 6섹터 그리고 8섹터 셀에서, 편파, 주파수 대역, 주파수 재사용 빈도, C/I에 따라 구한 결과의 가입자수는 최대 5,200DSI(Digital Subcriber Interface)에서 최소 1,300DSI까지 가능했다.

• 감성과학
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• 제7권4호
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• pp.25-33
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• 2004

본 연구에서는 경사와 위사의 장력에 기인되는 감성 봉제용 직물의 마찰특성을 KES-FB 계측기를 이용하여 분석하였다. 직물의 마찰특성은 직물표면의 마찰계수, 마찰계수의 평균편차, 그리고 표면요철도를 측정하였다. 이들 표면특성치를 분석하기 위해서 75d/36f PET 필라멘트를 경사로 사용하고 100d/192f PET 필라멘트를 위사로 사용하여 5매 주자직 직물을 Omega와 Picanol 직기에서 각각 제직하고 이들을 같이 연결하여 염색가공 공정을 진행시켰다. 이들 가공된 직물의 직물표면특성은 제직시 측정된 경사와 위사의 장력특성과 함께 분석되어 졌으며 직물의 중앙부위와 양 셀베지 부분의 직물 위치에 따른 표면특성의 차이가 분석되어졌다.

• 한국염색가공학회지
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• 제22권3호
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• pp.282-291
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• 2010

Digital textile printing(DTP) is becoming more important because the production trend of textile printing goods is adapting to small-lot multiple items. Recently enhanced use of DTP is closely connected with production of high value-added products in fashion industry, which is also appropriate for quick response system(QRS). Quality of DTP depends on pre-treatment, after-treatment, ink, media, printer, etc. One of these parameters, Selection of good media is very important to obtain high quality of DTP products. Especially, the effects of media on printing quality of DTP according to yarn twist and structure of knitting fabric were examined in this study. Two types of yarn twist of 830 t.p.m and 1630 t.p.m for cotton knit were used and five types of media structures were knitted with single circular knitting machine. First, MIU, MMD, SMD's values are closely related with surface roughness of sample as well as printing quality. The hard twist samples were higher values than normal twist samples in the same media structure. In case of SMD, the values increased from plain to corduroy types. Second, aspect of line sharpness, line area, and line width values of hard twist samples decreased from plain to corduroy than those of normal twist samples. Third, line deviation values of hard twist samples, blurriness of line, also decreased than those of normal twist samples.