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S-Function Builder를 이용한 UWB 시스템의 성능해석
이성신,김기표,최정식,변건식 東亞大學校附設情報技術硏究所 2005 情報技術硏究所論文誌 Vol.12 No.2
The application of UWB not only complies with the requirements of remote sensors system(ECG), it also contributes to the effectiveness of the implementations through its unique qualities such as ultra low transmission power - an important factor when dealing with biomedical equipment. In this paper, the aim is to replace the wired ECG sensor with a wireless link and design wireless UWB communication system. The various pulse shapes are presented that satisfies the FCC spectral mask and FCC part 15 rule. It is shown that UWB can be a high rate transmission over short ranges using rake receiver, with the capability for reliably transmitting 100Mbps over distance at about 10 meters.
김경징,최영규,이상범 단국대학교 2001 산업기술연구 Vol.2 No.-
Natural Language Process is a research to get many benefits from computer by human knowledge of language transplant to computer. This paper concern induced the concept of natural language of recognition grapheme string, is the result of Hangeul Handwritten Character Recognition, in the post process The research about post process for better recognition performance in off-line Hangeul Handwritten Character Recognition was performed. It searches a feasible mistaken recognition string through non-ksc5601 character scan and morpheme search toward to the recognition grapheme, is the result of recognition module. and performs string conversion and correction to a searched mistaken recognition string and the performing is based on similarity of shape. It performed research for remove a mistaken recognition and better recognition performance in Hangeul Handwritten Character Recognition through post process.
장세진,고상백,강동묵,김성아,강명근,이철갑,정진주,조정진,손미아,채창호,김정원,김정일,김형수,노상철,박재범,우종민,김수영,김정연,하미나,박정선,이경용,김형렬,공정옥,김인아,김정수,박준호,현숙정,손동국 大韓産業醫學會 2005 대한직업환경의학회지 Vol.17 No.4
Background and Purposes: Over the past three decades, numerous studies performed in Korea have reported that job stress is a determinant risk factor for chronic diseases and work disability. Every society has its own culture and occupational climate particular to their organizations, and hence experiences different occupational stress. An occupational stress measurement tool therefore needs to be developed to estimate it objectively. The purpose of this study is to develop and standardize the Korean Occupational Stress Scale (KOSS) which is considered to be unique and specific occupational stressors in Korean employees. Subjects and Methods: Data were obtained from the National Study for Development and Standardization of Occupational Stress (NSDSOS Project: 2002-2004). A total of 12,631 employees from a nationwide sample proportional to the Korean Standard Industrial Classification and the Korean Standard Occupational Classification were administered. The KOSS was developed for 2 years (2002-2004). In the first year, we collected 255 items from the most popular job stress measurement tools such as JCQ, ERI, NIOSH and OSI, and 44 items derived from the a qualitative study (depth interview). Forty-three items of KOSS, in the second year, were retained for use in the final version of the KOSS by using Delphi and factor analysis. Items were scored using conventional 1-2-3-4 Likert scores for the response categories. Results: We developed eight subscales by using factor analysis and validation process: physical environment (3 items), job demand (8 items), insufficient job control (5 items), interpersonal conflict (4 items), job insecurity (6 items), organizational system (7 items), lack of reward (6 items), and occupational climate (4 items). Together they explained 50.0% of total variance. Internal consistency alpha scores were ranged from 0.51 to 0.82. Twenty-four items of the short form of the KOSS (KOSS-SF) were also developed to estimate job stress in the work setting. Because the levels of the subscales of occupational stress were gender dependent, gender-specific standard norms for both the 43-item full version and the 24-item short form using a quartile for the subscales of KOSS were presented. Conclusion: The results of this study suggest that KOSS might be an appropriate measurement scale to estimate occupational stress of Korean employees. Further and more detailed study needs to be conducted to improve the validity of this scale.
Geocrete와 규산액을 이용한 매립지 사면 침출수 누출제어
조재범,현재혁,나진성,김자영 충남대학교 환경문제연구소 2000 環境硏究 Vol.18 No.-
There are two strategies to cope with the troubles in landfill site after closure. The first method is active in a way that the wastes are dug up and the recyclable materials are reutilized, meanwhile the materials not recyclable are incinerated in order to minimize the volume of residues to be disposed of. The second method is rather passive and defensive in a way that the source of contamination, that is, buried wastes are not treated. Instead, the transport of leaking leachate and gases generated from the wastes are intercepted and controlled. In the study, as a passive way, the efficient leachate blocking process will be investigated, and how well geocrete and soluble sodium silicate can be utilized as a substitute to controls leachate leaking from landfill sidewall. In case of compression test, the strength of mixture ( I ) and (Ⅱ), even after 7 days' curing were higher than the criteria threshold (5 kg/cm2). Soaking in the acrid for 4 days and 7 days respectively, the compressive strength of the specimens reduced seriously. The toxicity of geocrete is not detected through the bioassay test, once it is mixed with sodium silicate and the complex is formed. The hydraulic conductivity of the mixtures even after 7 days' curing satisfied the threshold limit (1.0×10-7cm/s).
Jing-Jing Bai,Jung-Gyu Lee,Sang-Yoon Lee,Soojin Kim,Mi-Jung Choi,Youngjae Cho 한국축산식품학회 2017 한국축산식품학회지 Vol.37 No.5
Marine fish skin peptides (FSP) have been widely studied due to their antioxidant and antimicrobial properties. We aimed to use a natural antioxidant, FSP, to replacing synthetic preservatives in a pork patty model, which is safer for human body. Moreover, nano-liposome technology can be applied for masking the fishy smell and improving the stability of this peptide. Therefore, in this study, the effects of FSP and FSP-loaded liposomes (FSPL) on pork patty were evaluated through the tests of thiobarbituric acid reactive substances (TBARS), color, cooking loss, texture, volatile basic nitrogen (VBN), and the pH value, during 14 d of refrigerated (4°C) storage. The results showed that all FSP-treated patties had lower TBARS values than control patties, which indicated an inhibitory effect of FSP on lipid oxidation. This effect in the patties depended on the FSP concentration. However, FSPL-treated patties showed significantly higher and undesirable TBARS values compared to the control, and this effect depended on the FSPL concentration. None of the physicochemical results showed remarkable changes except the pH and VBN values. Therefore, this study provides evidence that FSP has great potential to inhibit the lipid oxidation of pork patties and is capable of maintaining the quality and extending the shelf life. However, it is necessary to study the application of FSP treatments greater than 3% to improve the antioxidant effect on pork patties and search for other coating materials and technology to reduce the drawbacks of FSP.
Research on the Origin and Development of Heated Kang in Northeast Asia
Sang Jing fei 국제온돌학회 2012 International Journal of Ondol Vol.2012 No.-
This paper gives a definition of the heating facility—Heated Kang and its primary form in northeast Asia using the method of typology. It also analyzes the origin and development of Heated Kang based on archaeological traces and literature materials, and traces back the word “Kang” from the viewpoint of linguistics, in order to make clear the origin time, place and development of Heated Kang.
Metabolic Engineering of Probiotic <i>Saccharomyces boulardii</i>
Liu, Jing-Jing,Kong, In Iok,Zhang, Guo-Chang,Jayakody, Lahiru N.,Kim, Heejin,Xia, Peng-Fei,Kwak, Suryang,Sung, Bong Hyun,Sohn, Jung-Hoon,Walukiewicz, Hanna E.,Rao, Christopher V.,Jin, Yong-Su American Society for Microbiology 2016 Applied and environmental microbiology Vol.82 No.8
<P>Saccharomyces boulardii is a probiotic yeast that has been used for promoting gut health as well as preventing diarrheal diseases. This yeast not only exhibits beneficial phenotypes for gut health but also can stay longer in the gut than Saccharomyces cerevisiae. Therefore, S. boulardii is an attractive host for metabolic engineering to produce biomolecules of interest in the gut. However, the lack of auxotrophic strains with defined genetic backgrounds has hampered the use of this strain for metabolic engineering. Here, we report the development of well-defined auxotrophic mutants (leu2, ura3, his3, and trp1) through clustered regularly interspaced short palindromic repeat (CRISPR)-Cas9-based genome editing. The resulting auxotrophic mutants can be used as a host for introducing various genetic perturbations, such as overexpression or deletion of a target gene, using existing genetic tools for S. cerevisiae. We demonstrated the overexpression of a heterologous gene (lacZ), the correct localization of a target protein (red fluorescent protein) into mitochondria by using a protein localization signal, and the introduction of a heterologous metabolic pathway (xylose-assimilating pathway) in the genome of S. boulardii. We further demonstrated that human lysozyme, which is beneficial for human gut health, could be secreted by S. boulardii. Our results suggest that more sophisticated genetic perturbations to improve S. boulardii can be performed without using a drug resistance marker, which is a prerequisite for in vivo applications using engineered S. boulardii.</P>