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촛불에서 발생하는 미세먼지 측정과 자동정화 시스템 구현
변현섭(Byeon Hyeon Seop),정연만(Jeong Yeon Man) 한국통신학회 2022 한국통신학회 학술대회논문집 Vol.2022 No.2
본 논문은 촛불에서 발생되는 미세먼지를 측정하고 미세먼지 농도에 따라 자동적으로 정화 시스템이 동작하도록 구현하였다. 최근 실내에 좋은 향기와 아늑한 분위기를 연출하기 위해 향초를 사용하고 있지만, 향초를 태운 미세먼지는 실제로 건강에 악영향을 줄뿐만 아니라 밀페된 공간에서 심해진다. 따라서 실내 공간의 내부 미세먼지 농도를 실시간적으로 측정하고, 자동 정화 시스템을 통해 미세먼지 농도를 줄이도록 연구하였다.
국내 양돈장의 사육 온도와 밀사율이 구강액 채취율에 미치는 영향
변현섭 ( Hyeon Seop Byeon ),김미화 ( Mihwa Kim ),권성애 ( Sungae Kwon ),한미나 ( Mina Han ),한성태 ( Sung Tae Han ),장래훈 ( Rae Hoon Jang ),정윤수 ( Yun-soo Chung ),김석현 ( Seokhyun Kim ),전보영 ( Bo-young Jeon ) 한국동물위생학회 2021 韓國家畜衛生學會誌 Vol.44 No.4
We investigated the effect of temperature and stock density on the collection efficiency of oral fluid in the pig farm in Korea. Three pig farms with similar breeding environmental conditions were selected and four pens of each farm (total 12 pens) were tested for the collection efficiency of oral fluid from pigs. Collection rate was considered as significant when oral fluid was collected from 70% of pigs within a pen. In the case of growing pigs, when internal temperature of pig barn increased by one designated degree (5℃), the oral fluid collection rate significantly decreased by 24.7% (P<0.05). The collection rate of oral fluid also decreased by 7.1% (P<0.05) as the density rate increase by one designated degree (12.5%). It was estimated that the collection efficiency of oral fluid decreased when the internal temperature of pig barn was 30℃ or higher, or barn density is higher 25% or high. On the other hand, in the case of stall-housing sows, unlike growing pigs, there was no significant differences according to the temperature, so oral fluid collection was considered to be efficient even in hot season.
Frame Memory 축소를 위한 DWT와 Color Conversion 기반의 Overdrive 구조
변진수(Jin-Su Byeon),김현섭(Hyeon-Seop Kim),김도석(Do-Seok Kim),전은선(Eun-Seon Jeon),홍인성(In-Seong Hong),김보관(Bo-Gwan Kim) 대한전자공학회 2009 電子工學會論文誌-SD (Semiconductor and devices) Vol.46 No.1
최근 LCD가 TV 시장에서 높은 점유율을 보이고 DMB, PMP 그리고 휴대폰과 같이 LCD를 디스플레이로 사용하는 휴대용기기에서의 동영상 이용이 급격히 늘어나고 있다. LCD의 응답시간을 향상 시킬 수 있는 방법의 하나로 Overdrive 기법이 있으나 프레임 메모리의 사용이 필수이기 때문에 메모리의 사용량이 많아진다. 본 논문에서는 Overdrive 기법에 사용되는 프레임 메모리 사용량을 줄이기 위하여 Color Conversion과 수정한 DWT-IDWT를 제안하였다. 이를 통해 화질의 큰 열화가 생기지 않으면서도 프레임 메모리의 사용량을 50%로 줄일 수 있었고, 기존의 방법과 비교하여 메모리 사용량의 약 15%를 더 줄일 수 있었다. 제안한 방법은 Xilinx FPGA로 구현하였고 메모리를 제외하고 2172개의 Slice가 사용되었다. Recently, the LCD has high market share in TV market. The use of motion images in portable devices like DMB, PMP and Cell Phone is growing rapidly. One of the technique of enhancing the LCD's characteristic which is the slow response time. But, the technique requires a lot of memory usage, because of the requirement of frame memory. In this paper, we propose a reduction method for the frame memory that is required for LCD overdrive. Proposed overdrive architecture based on modified DWT-Inverse DWT and Color Conversion. The proposed architecture has a considerable PSNR. At once, it uses 50% of frame memory size and reduces 15 % of frame memory size compare with previous architecture. The design was implemented using Xilinx Vertex4 and had 2172 Slice except Memory.
Han, Mi Na,Byeon, Hyeon Seop,Lee, Cho Yeon,Jo, Nam Sin,Lee, Jong Hwa,Jang, Rae Hoon,Kim, Chang Seop,Na, Ki Jeong The Korean Society of Veterinary Service 2019 韓國家畜衛生學會誌 Vol.42 No.4
Newcastle disease (ND) is an infectious poultry disease that caused high mortality and reduced egg production. NDVs are regularly present in the domestic duck population. And ducks play a possible role in the maintenance and transmission of NDVs. While we were monitoring the Avian Influenza, NDVs were isolated from field samples by accident. So we analysed the biological and genetic characteristics of these viruses. Lentogenic NDVs were isolated from two farms among twenty breeder duck farms. The ages of ducks were 39 weeks old in the 'A' farm and 3~72 weeks old in the 'B' farm. And they were not inoculated with the NDVs vaccine. In the biological characteristics, the both viruses which separated from the farm 'A' and 'B' were thermostable. The amino acid sequence of a site from 112 to 119 in the fusion (F) protein was 'GKQGRLIG' which has monobasic motif in the samples of both farms. And this means the separated NDVs are lentogenic. Phylogenetic analysis was performed by entire nucleotide sequence of F protein. The virus strains from the A farm (MN095239) and the B farm (MN095240) belonged to class II genotype I. Using the analysis of whole F protein nucleic acid sequence, the MN095239 (GenBank) had homology with Ulster strain about 99.95% and the MN095239 (GenBank) had homology with KR/CK/KU_LBM255/09 strain about 99.89%. NDV surveillance is needed to investigate epidemiological relationship of domestic breeder duck isolates in Korea.
The effect of extract from leaves and stalks of Angelica gigas on the innate immunity
Kang, Shin-Seok,Byeon, Hyeon-Seop,Kang, Shin-Kwon,Ko, Duk-Hwan,Lim, Dae-Jun,Lee, Jung-Hwa,Kang, Sung-Ho The Korean Society of Veterinary Service 2013 韓國家畜衛生學會誌 Vol.36 No.4
The dried root of Angelica gigas (A. gigas) has been traditionally used as an oriental medicine, which is known to improve blood circulation and blood stasis. In the present study, leaves and stalks of A. gigas were used to investigate their effects on the innate immunity. The extracts were prepared from leaves and stalks of A. gigas and were fed to mice. The numbers of blood cells, total WBCs, neutrophils, lymphocytes, eosinophils and basophils were increased by 50% in mice fed with leaves extract of A. gigas compared to control mice. However, the numbers of blood cells were decreased when treated with stalks extract of A. gigas. The level of cholesterol and triglyceride in serum was markedly reduced in both mice group fed with leaves extract and stalks extract of A. gigas compared to control group (P<0.01). There was no significant change in the level of albumin, total protein, phosphate and calcium in serum. Activity of cationic peptide was found to be diffused in the testicles of mice fed with leaves extract of A. gigas compared to control group, which might be due to increased lysozyme in testicle. The lysoplate assay and immunohistochemistry assay suggest that the extract of leaves and stalks of A. gigas are immunogenic, but the effects might be related with acquired immune response rather than innate immunity.
Mi Na Han,Hyeon Seop Byeon,Cho Yeon Lee,Nam Sin Jo,Jong Hwa Lee,Rae Hoon Jang,Chang Seop Kim,Ki Jeong Na 한국동물위생학회 2019 韓國家畜衛生學會誌 Vol.42 No.4
Newcastle disease (ND) is an infectious poultry disease that caused high mortality and reduced egg production. NDVs are regularly present in the domestic duck population. And ducks play a possible role in the maintenance and transmission of NDVs. While we were monitoring the Avian Influenza, NDVs were isolated from field samples by accident. So we analysed the biological and genetic characteristics of these viruses. Lentogenic NDVs were isolated from two farms among twenty breeder duck farms. The ages of ducks were 39 weeks old in the ‘A’ farm and 3∼72 weeks old in the ‘B’ farm. And they were not inoculated with the NDVs vaccine. In the biological characteristics, the both viruses which separated from the farm ‘A’ and ‘B’ were thermostable. The amino acid sequence of a site from 112 to 119 in the fusion (F) protein was ‘GKQGRLIG’ which has monobasic motif in the samples of both farms. And this means the separated NDVs are lentogenic. Phylogenetic analysis was performed by en-tire nucleotide sequence of F protein. The virus strains from the A farm (MN095239) and the B farm (MN095240) belonged to class II genotype I. Using the analysis of whole F protein nucleic acid se-quence, the MN095239 (GenBank) had homology with Ulster strain about 99.95% and the MN095239 (GenBank) had homology with KR/CK/KU_LBM255/09 strain about 99.89%. NDV surveillance is needed to investigate epidemiological relationship of domestic breeder duck isolates in Korea.
Han, Mi Na,Byeon, Hyeon Seop,Han, Seong Tae,Jang, Rae Hoon,Kim, Chang Seop,Choi, Seok Hwa The Korean Society of Veterinary Service 2018 韓國家畜衛生學會誌 Vol.41 No.4
Avian pathogenic E. coli (APEC) causes severe economic losses in the poultry farms, due to systemic infections leading to lethal colisepticemia. It causes a variety of diseases from air sac infection to systemic spread leading to septicemia. Secondary infection contains opportunistic infections due to immunosuppression disease. Collibacillosis causes the great problems in the poultry industry in Korea. Thus, it is necessary to identify and classify the characteristics of E. coli isolate of chicken origin to confirm the diversity of symptoms and whether they are transmitted among the farms. Fragment analysis is identify the difference in the number of Variable-Number Tandem-Repeats (VNTRs) for genotyping. VNTRs have repeating structure (Microsatellite, Short tandem repeats; STR, Simple sequence repeats; SSR) in the chromosome. This region can be used as a genetic marker because of its high mutation rate. And various lengths of the amplified DNA fragment cause the difference in the number of repetition of the DNA specific site. The number of repetition sequences indicates the separated size of fragments, so the each fragments can be distinguished by specific samples. The results of the sample show that there is no difference in six microsatellite loci (yjiD, aidB, molR_1, ftsZ, b1668, yibA). There are differences among the farms in relation of the number of repetitions of other six microsatellite loci (ycgW, yaiN, yiaB, mhpR, b0829, caiF). Four (ycgW, yiaB, b0829, caiF) of these six microsatellite loci show statistically significant differences (P<0.05). It means that the analysis using four microsatellite loci including ycgW, yiaB, b0829, and caiF can confirm among the farms. Five E. coli samples in one farm have same SSR repetition at all markers. But, there are significant differences from other farms at Four (ycgW, yiaB, b0829, caiF) microsatellite loci. These results emphasize again that the four microsatellite loci makes a difference in the amplified DNA fragments, enabling it to be used for E. coli genotyping.