• Reproductive and Developmental Biology
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• 제36권3호
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• pp.163-166
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• 2012

This study was conducted to determine the relationship between elapsed time after semen preservation on the changes of bacteria and semen quality. Semen was diluted with BTS(Beltsville Thawing Solution) extender without antibiotic for 7 days and sperm parameter and fertility were measured. Sperm motility was measured by CASA and total bacteria number was counted after 22~24 hr incubation from counting agar plate in which sperm dilute to $10{\sim}10^6$ in 0.9% saline solution and inoculate to agar. Acrosomal integrity was measured by Chlortetracycline (CTC) staining. CTC patterns were uniform fluorescence over the whole head (pattern F), characteristic of incapacitated acrosome-intact spermatozoa; fluorescence-free band in the post-acrosomal region (pattern B), characteristic of capacitated acrosome-intact spermatozoa; and almost no fluorescence over the whole head except for a thin band in the equatorial segment (pattern AR), characteristic of acrosome reacted spermatozoa. Total number of bacteria was significantly increased (p<0.0001) 3 days after preservation. Sperm motility, viability, and morphological abnormality on elapsed time after preservation were lower from 5 ($77.24{\pm}6.47$, p<0.001) and 7 days ($77.24{\pm}6.47$, p<0.001) after preservation compared to 1 ($15.71{\pm}7.18$) and 3 days($18.39{\pm}7.22$) after preservation, respectively. Sperm viability was significantly lower ($53.25{\pm}35.03$, p<0.0001) at 7 days after preservation. Morphological abnormality of sperm was lower (p<0.001) at 1 ($15.71{\pm}7.18$) and 3 ($18.39{\pm}7.22$) days compared to 5 ($21.84{\pm}7.91$) and 7 ($22.59{\pm}9.93$) days after preservation. Acrosomal integrity and capacitation rate (pattern F) were significantly lower (p<0.001) from 5 days after preservation. Based on the data we obtained from this study suggested that semen preserved more than 5 days without antibiotic would not recommend use for artificial insemination.

• 한국조경학회지
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• 제13권2호
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• pp.71-90
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• 1985

^x This study is composed of four Process. Process 1 suggests the background, purpose and necessity to provide with criteria for establishing Korean-style house preservation area including the present situation of the established area in our country. Also it is provided with the approach and the substantial realm to discuss the established criteria for the subject of this thesis. Process 2 dealt with theoretical parts as a premise to suggest the established criteria for the Korean- style house preservation area : 1) Original background of the Korean- style house, characteristic of the Korean traditional housing, changed situation of the Korean- style house based on the epoch, classified into the characteristic of the Korean- style house. 2) The characteristic of the Korean- style house and its values existed in the present urban areas are investigated by synthesizing such contents. 3) The significance for establishing the preservation area of the Korean- style houses in urban areas which is insufficient systematically in suggested as follows : First, establishment of the preservation area of the Korean- style houses with regard to the traditional succession of cultural properties. Second, acknowledging preservation problems of cultural properties in our country due to the world- wide tendency, preservation of historical environment of new comprehensive concept for the preservation of cultural properties. Process 3, as a case study on the establishment of the preservation area, describes a framework for investigating and analyzing the status by reviewing the present situation of the Korean- style preservation area in Seoul city which is established as the preservation area. Process 4 suggests seven criteria with regard to the establishment of the preservation area. 1) A decisive criterion for the Korean- style house to divide into Korean- style house and non- Korean style house (proper building and nonproper building) for the preservation. 2) A concrete decisive criterion for the Korean- style house with regard to valuable endowment with dominent factors in its landscape. 3) A decisive criterion for the review of the landscape preservation for the nonproper building. 4) Suggesting logical evidences for the above second and third criterion (suggesting appropriateness). 5) Dividing into following two criteria for the decision of the building condition. a) A decisive criterion of the Korean- style house's condition. b) A decisive criterion of non- Korean style house's condition. 6) A selective criterion for the preservation building after synthesizing above five criteria. 7) Final criterion for establishing the preservation area with regard to systematic particulars.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2011년도 춘계학술발표대회
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• pp.986-989
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• 2011

Reversible data hiding is a technique that can embed information into cover media (image, video, voice signal) and can recover the original cover media after extracting the embedded information. In this papa, we propose a new reversible data hiding methods that based on block median preservation and the image local characteristic. By using the median value of a block, a high payload can be got and by considering the image local characteristic, a lot of distortion can be avoided and a high PSNR can be got. In the experiment, our methods can generate better result than the previous reversible data hiding methods.

• 한국실내디자인학회논문집
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• 제21권4호
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• pp.129-137
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• 2012

This study investigated the architectural characteristics and preservation status of traditional houses, designated as cultural assets in Jecheon. It aimed to provide basic information for cultural assets preservation policy in Jecheon by finding architectural characteristics of traditional houses. This study was conducted using the research methods of the existing literature and field survey to compare a current status of traditional houses. The result are as followings. Firstly, measures to protect the archetype of traditional houses are urgently needed. For systematic maintenance of local cultural assets, the relevant informations have to be constantly updated with ongoing management. Secondly, the site of traditional houses show the typical appearance of Baesanimsu(背山臨水). They were built with the hill or mountain in the north and agricultural land in the south. Types of placement are mostly closed type of 'ㅁ' shape. Thirdly, An-chae is found various type of 'ㄱ' shape, and Toet-khan was developed. Lastly, Sarang-chae is a mostly type of 'ㄴ' shape, and the traces of confucian thinking is found in floor plan.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2021년도 추계학술발표대회
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• pp.655-658
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• 2021

The purpose of multimodal medical image fusion (MMIF) is to integrate images of different modes with different details into a result image with rich information, which is convenient for doctors to accurately diagnose and treat the diseased tissues of patients. Encouraged by this purpose, this paper proposes a novel method based on a two-scale decomposer and detail preservation model. The first step is to use the two-scale decomposer to decompose the source image into the energy layers and structure layers, which have the characteristic of detail preservation. And then, structure tensor operator and max-abs are combined to fuse the structure layers. The detail preservation model is proposed for the fusion of the energy layers, which greatly improves the image performance. The fused image is achieved by summing up the two fused sub-images obtained by the above fusion rules. Experiments demonstrate that the proposed method has superior performance compared with the state-of-the-art fusion methods.

• 한국환경복원기술학회지
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• 제13권5호
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• pp.59-80
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• 2010

This research This research aims at developing systemic evaluation model in terms of biotope preservation through reports, literatures, and expert survey analysis by implementing biotope structure analysis in area level with selecting Hyunpoong and Yuga-myeon, Dalseong county, Daegu metropolitan city as a site. First of all, as a result of biotope type classification of research site, biotope type groups are classified into total 13, and its biotope types are divided into total 61. Also, as a result of literature analysis, total 18 items are drawn such as diversity of biotope typical species as a index item to assess the preservation value of biotope, and the first evaluation index are divided into 10 and the second ones are divided into 8 according to characteristic of index items. As a result of expert survey analysis, All 10 index items, first evaluation index, show high importance average (above 4.7). As a result of implementation of main cause for categorizing evaluation index by characteristic, there are 3 factors such as 'obstructive factor.' Based on above survey analysis result, as a result of estimating the weight of each item, 'restoration factor' showed the highest, 3.4541, but 'factor of habitat stability' showed 3.1468, which is the lowest The systemic value evaluation was set by comprehensively analyzing these results. As a result of biotope preservation value evaluation through applying research site, total 19 types which are abundant in vegetation are classified into I class, 12 types in II class, 5 types in III class, 10 types in IV class, and 15 types in V class respectively. Lastly, as a result of second evaluation, it is analyzed that there are 17 special meaningful space to preserve species and biotope(1a, 1b) and 61 meaningful space to preserve species (2a, 2b, 2c).

• 한국실내디자인학회논문집
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• 제12호
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• pp.67-77
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• 1997

Preservation space is a functionally$\ulcorner$core$\lrcorner$in a museum. Gernerally, it is a common view that collections are exhibited within 5% of total stored collections. So that, part of collections are cycled exhibition space centering around preservation space, and that is a important mechanism of collections circulation in a museum. It is the best way that collections should be $\ulcorner$conserve$\lrcorner$ in a stable condition, but inevitably collections are exposed as stable condition, but inevitably collections are exposed as called $\ulcorner$exhibition$\lrcorner$. For that reason the function of $\ulcorner$exhibition$\lrcorner$. For that reason the function of $\ulcorner$exhibition$\lrcorner$for 'showing' and the function of $\ulcorner$preservation$\lrcorner$for 'conserve'are contrary to each other's concept, so it is principle of scheme that these concepts should be functionally connected with and planned$\ulcorner$match$\lrcorner$. In addition, various studies (for example, comparative analysis of collections, examination of collections for conserved condition or special exhibition, and classification of new item, etc.) are worked in preservation space. Therefore, preservation space should not be considered as a warehouse, should be composed not only$\ulcorner$comfortable place to rest of collections$\lrcorner$but also $\ulcorner$part of study room$\lrcorner$in a museum. So that, environment of museum should be established by plan to preservation and management. The point of plan to museum is that minimize dangerous element for collections, and then develop an essencial element of space for$\ulcorner$conservation$\lrcorner$and$\ulcorner$exhibition$\lrcorner$. The reason why with a few exceptions (buildings which have being exposed or extremely minor part of collections) most of collections have been lasting its life during over hundreds of years with adapting itself to natural features, so scheme of preservation facilities should be made up with understanding and analysis generic character of collections, and then establish proper temperature and humidity environment.

• Reproductive and Developmental Biology
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• 제39권1호
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• pp.7-11
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• 2015

Preservation of liquid semen is an important factor for breeding management in swine industry. Oxidative stress of spermatozoa during liquid preservation has a detrimental effect on sperm quality and decreases fertility. Objective of this study was to determine the effect of antioxidant, Quercetin, on capability of porcine liquid semen preservation. Freshly collected porcine semen from boars (n=3), having proven fertility was counted, diluted to $3{\times}10^7/mL$ and divided into 5 different semen extenders. Aliquots of diluted semen with different extenders were subjected to measure the pH, motility, viability and sperm DNA structure status on elapse time after preservation for 10 days. For the first 3 days, semen preserved in all 5 different extenders maintained their initial pH and either gradually decreased or increased thereafter, indicating lipid peroxidation has started. Sperm motility (r=0.52, p=0.01) and viability (r=0.55, p=0.03) had positive correlation with semen pH. Sperm motility was maintained well (p<0.05) in especially 2 extenders containing Tris and antioxidant compared to other extenders, suggesting both Tris and antioxidant worked as pH regulator and had beneficial effects on sperm characteristic during preservation. Sperm DNA structure status accessed by sperm chromatin structure assay on elapsed time after preservation, tended to be higher in semen preserved without antioxidant. Taken together, addition of antioxidant to extender prevents the sperm from oxidative stress during storage in mechanism by which antioxidant slows the lipid peroxidation, and thus reduced the reactive oxygen species in preserved porcine semen resulted in maintaining semen pH, sperm motility and viability for 7~10 days.

• 산업기술연구
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• 제11권
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• pp.27-31
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• 1991

Consider a problem to keep half of the poles unchanged when some of the coefficients of stable characteristic polynomials are perturbed. A procedure was proposed for the problem. However, the pole assignment procedure has not been addressed. A simple algorithm for the procedure is proposed in this paper.

• Korean Chemical Engineering Research
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• 제51권5호
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• pp.602-608
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• 2013

$CO_2$를 포집, 수송, 저장하는 기술에 있어서 경제적이고 친환경적 혁신기술로 주목받고 있는 가스 하이드레이트 이용기술의 연구가 활발히 진행되고 있다. 본 연구에서는 가스 하이드레이트를 이용한 $CO_2$ 수송/저장기술의 핵심이 되는 자기보존효과(self-preservation effect)가 발현하는지를 확인하고자 하였다. 특히 $CO_2$ 하이드레이트 입자의 직경에 대한 효과 정도를 실험적으로 살펴보았다. 밀리미터, 마이크론, 그리고 나노 크기의 각각 다른 직경을 갖는 세 종류 $CO_2$ 하이드레이트 샘플을 준비하였고, 3주간 $-15{\sim}-30^{\circ}C$의 온도 및 대기압 조건에서 각각의 샘플 무게 변화를 측정하였다. 실험연구 결과 $CO_2$ 하이드레이트의 자기보존효과를 최대한 얻기 위해서는 온도는 가능한 낮아야 하며, 샘플의 직경 크기가 클수록 좋고, 샘플은 치밀한 구조로 조직되어 높은 밀도를 갖는 방식으로 제조하는 것이 매우 향상된 결과를 얻을 수 있음을 확인하였다.