• 대한치과보철학회지
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• 제33권3호
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• pp.569-583
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• 1995

Disinfection of dental impressions are necessary due to contamination with patient’s saliva and blood, which is a potential for cross-infection. The purpose of this study was to evaluate the effects of disinfection of four hydrophilic rubber impression materials with three disinfecting solutions, on the dimensional stability and surface hardness of improved stone casts. Three hydrophilic vinyl polysiloxane impression materials(Express, Reprosil, Exafine) and one polyether impression material(Impregum-F) were mixed according to the manufacturer’s directions and impressions were made on a ADA specification No. 19 stainless-steeldie. On removal of the impressions, each impression was immersed in one of the disinfectants(Banicide, Potadine, Clorox) for 10 minutes. After disinfection, type IV improved stone. casts were poured. On this cast, the linear dimension and surface hardness were measuredusing a Measurescope(Nikon, Japan) and a Barcol hardness tester(Barber, Colman Co U. S. A). The results were as follows : 1. The improved stone casts from disinfected Reprosil and Impregum-F impression material did not show dimensional changes(P>0.01). Those from disinfected Express and Exafine impression material showed dimensional changes(P<0.01). The amount of shrinkage was not clinically significant. 2. The improved stone casts from disinfected Express impression material did not exhibit changes in surface hardness(P>0.01), but those from disinfected Reprosil, Exafine, Imp regnum-F impression material showed changes in surface hardness(P<0.01). 3. The dimensinal stability and surface hardness of the improved stone casts were satisfactory using Banicide on Express, all disinfectants used in this study on Reprosil, Potadin and Clorox on Exafine, Banicide and Clorox on Impregum-F. According to these results, immersion disinfection of hydrophilic rubber impression mate rials did not adversely affect the resultant casts. Nevertheless compatibility tests of impression materials and disinfectants should be done when disinfecting impressions.

• Asian-Australasian Journal of Animal Sciences
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• 제23권4호
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• pp.537-542
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• 2010

The goal of this study was to investigate how spectrographic features of ultrasonic vocalizations (USVs) in rats vary among individuals and behaviors. Eighteen pairs of rats were allocated to individual pair cages. Each pair's behaviors and vocalizations were recorded during the 900s a known cage-mate was returning to the cage. The effects of individuals, behaviors, and the interaction between individuals and behaviors ($individuals{\times}behaviors$) were tested on the duration and peak frequencies. There was difference in the duration and peak frequency: i) among individuals (p<0.0001 and p<0.0001, respectively); ii) among behaviors (p = 0.0667 and p<0.0001, respectively); iii) among individuals${\times}$behaviors (p<0.0001 and p<0.0001, respectively). The frequency of ultrasonic vocalizations changed with a frequency ranging from 40 to 71 kHz which were emitted by individuals, whereas the frequency of ultrasonic vocalizations changed with a frequency ranging from 60 to 70 kHz which were emitted by behaviors. The peak frequency of call on 'contact' behavior was lower than that of call on other behaviors, but call duration of call on 'contact' was longer than on other behaviors. Especially, 40 kHz calls were found on 'contact' and 'other' behaviors. We suggest that ultrasonic vocalizations need to be subdivided and the effects of individuals and behaviors must be considered to assess emotional state of rats because these may influence the features of ultrasonic vocalizations.

• 한국수정란이식학회지
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• 제1권1호
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• pp.35-49
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• 1986

Recipients are an integral part of embryo transfer and they are expensive to maintain as a good recipient. Recipient management is one of the most important components in a successful embryo transfer program. Management includes selection and subsequent care of the animals. A good recipient is basically on "open" cows or heffers whose reproductive tract is capable of receiving one or two embryos and incubating it to term. Potential recipients should be always be healthy and cycling normally ranging from 18 to 23 days. A thorough veterinary examination is recommended for candidate of recipients and cattle for questionable health should be eliminated from the recipient herd. Age and size of recipients are particularly important considerations when heifers are used, because of most embryos available for transfer are from large dams and sires. Body condition can influence a recipient's production, reproduction and health. Obese and underconditioned cattle should be avoided for use. Transfer of fresh embryos especially requires precise synchronization of donors and recipients. For estrus synchronization, PGF$_2$$\alpha$ is injected twice 10 to 12 days apart and short4erm progestagen treatment is applied to potential recipient cattle by coil into vagina (PRID) or ear implant (Synchro-Mate-B). The highest pregnancy results are achieved in recipients at exact synchrony with donors or 12 to 24 hr earlier than donors. Estrus detection is a major factor in breeding efficiency. High accuracy can be achieved by use of heat mount detection alds or by obserbing cattle for 30-minute peroids 3 times daily. Assay progesterone in milk can be used to discrIminate between pregnant and nonprenant recipients. Rectal palpation on day 35 to 70 after is an accurate and safe method of pregnancy diagnosis. Embryonic mortality in recipients may be associated with factors such as high environmental temperature and nutritional or lactational stress in early lactation period. Achievement of short calving interval requires concentrated management activity during the first 90 days following calving. Acceptable candidate for a recipient should be routinely vaccinated for infectious diseases. Proper nutritional programs according to NRC requirements and body condition scoring system for recipient cattles are vital to the ultimate success of an embryo transfer program.r program.

• 한국정밀공학회지
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• 제27권4호
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• pp.95-101
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• 2010

The aim of this study was to detect longitudinal alterations on lumbar vertebral trabecular bone quality (microarchitecture and degree of mineralization) and bone mineral density (BMD) during pregnancy Virginal eighteen mice were used. Then, twelve mice were mated. Mice lumbar vertebrae were scanned before mate, at 7 days of pregnancy (early pregnancy, 6 mice) and immediately after delivery (late pregnancy, 6 mice) by using in-vivo micro-computed tomography Structural parameters, degree of mineralization and BMD were measured. During early pregnancy, there were no significant alterations on structural parameters, degree of mineralization and BMD. At late pregnancy, Tb.Th (11.8%) and BMD (12.7%) were significantly decreased and Tb.N (6.3%), Tb.Pf (43.0%) and BS/BV (15.1%) were significantly increased (p<0.05). Additionally, the lower degree of mineralization was increased, although, the higher degree of mineralization was decreased. These results indicated that the quality and BMD might be not affected during early pregnancy. At late pregnancy, however the bone quality and BMD were likely to be negatively affected.

• 한국도로학회논문집
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• 제7권1호
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• pp.1-9
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• 2005

본 연구는 재생 아스팔트 혼합물의 취 약 특성을 파악하고 이를 보완하기 위한 기초연구이다. 본 연구의 목적은 재생혼합물 내의 신 구 재료에 묻어 있는 바인더의 노화상태를 균등하게 할 수 있는 여러 가지 혼합방법을 제안하고 바인더의 노화특성을 개선하기 위한 방안을 제시하는 것이다. 재생혼합물의 굵은골재 및 매트릭스의 바인더 노화특성 분석은 Gel-permeation chromatography(GPC)를 통해 수행되었다. 재생혼합물 내 바인더의 노화상태 분석을 위한 혼합물 제조에는 원형골재(13mm 강자갈)가 굵은골재로 사용되어 RAP 굵은골재와의 구분이 용이토록 하였다. GPC를 통한 재생혼합물 내 바인더의 노화상태를 분석한 결과 신 구 바인더의 노화 정도에 차이가 있음을 확인하였다. 따라서 이를 개선하기 위해 본 연구에서는 5가지 혼합방법(AE)을 검토하였으며 D방법(RAP과 신규바인더를 선 비빔 후 신규골재 투입)에 의한 혼합방법의 개선으로 재생혼합물 내의 노화 정도의 차이가 크게 작아지는 것으로 나타났다.

• Journal of Acupuncture Research
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• 제23권3호
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• pp.47-56
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• 2006

Methods : 40 of Female rats were allowed to mate with 40 of male rats. Then, female rats were delivered of offspring rats, After birth 28 days, offspring rats were divided 8 groups, The normal group(Group A), the 10 mg/kg Angelicae gig antis radix~treated group(Group B), the 50 mg/kg Angelicae gigantis radix-treated group(Group C), the 100 mg/kg Angelicae gig antis radix-treated group(Group D), The control (noise-treated) group(Group E). the noise -10 mg/kg Angelicae gigantis radix-treated group(Group F), the noise-50 mg/kg Angelicae gigantis radix~treated group(Group G), and the noise-100 mg/kg Angelicae gigantis radix-treated group(Group H)(n = 5 in each group), From the 15th day of pregnancy, all rats were subcutaneously injected with 50 mg/kg BrdU once a day 30 min before the starting of experimental treatment. Rats of the prenatal noise-treated group were applied with 95 decibel supersonic machine sound for 1h once a day until delivery, After birth 28 days, offspring rats intraperitoneally injected with 50 mg/kg of BrdU and offspring rats were treated Angelicae gigantis radix Herb-acupunture on chungwan(CV12) for 7 consecutive days. For the detection of BrdU-positive cells and Ki-67 positive cells in hippocampus, immunohistochemistry was performed. Results : 1. The number of BrdU-positive cells in the dentate gyrus of noise-treated group was significantly decreased to normal group, and the Group F, G, H were significantly increased to control group. 2. The number of Ki-67 positive cells in the dentate gyrus of noise-treated group was significantly decreased to control group, and the Group G, H were significantly increased to control group. Conclusion : We concluded that postnatal Angelicae gigantis radix administration has effect on cell proliferation in offspring rats with prenatal noise stress during pregnancy.

• The Korean Journal of Ecology
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• 제28권5호
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• pp.237-243
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• 2005

To study entering and exiting routes of male and female Hynobius leechii to a breeding site and staying time of them within the breeding site, we monitored a breeding population located in the research forests of Kangwon National University. The breeding site was surrounded by a drift fence associated with nine pitfall traps. The breeding season of this population was about one month, from 16 March to 13 April, 2005. Breeding males arrived earlier at the breeding pond than females did. The operational sex ratio (OSR), defined as the ratio of males to females which are ready to mate, over a breeding season was female-biased as 0.67 male vs 1 female (57 males vs 87 females), but daily OSRs, OSR in a particular day, within the breeding pond were male-biased with $1.36\sim7.5$ male vs f female in six days out of seven investigated days. While breeding males stayed in the breeding pond for about 11 days, breeding females left the pond as soon as they completed oviposition. However, the females stayed at terrestrial areas near the pond for about seven days before completely leaving the breeding site. Entering and exiting routes to the breeding site were different between males and females, and between ovulated and oviposited females. Both males and females arrived earlier at the breeding site stayed longer within the site. Males stayed longer within the breeding site lost more body weight.

• 한국정보과학회논문지:소프트웨어및응용
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• 제31권1호
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• pp.43-53
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• 2004

학계와 산업계 모두 효율적인 재사용 기술인 Component-based Development(CBD)로의 전환을 받아들이고 있다. Product Line Engineering(PLE)에서의 컴포넌트 프레임워크는 컴포넌트, 커넥터와 그들의 시멘틱(Semantic)들의 집합으로 구성된다. 단순한 컴포넌트 조립 보다 반 완성 어플리케이션인 컴포넌트 프레임워크가 재사용의 잠재력이 더 크다. 그러나, 어플리케이션 개발을 위해 여러 업체에서 획득된 COTS 컴포넌트들의 연관관계, 의존관계가 서로 완벽하게 일치하지 않아, 컴포넌트 조립이나 컴포넌트 대체시 구현을 변경해야 하는 문제가 발생된다. 그러므로 커넥터는 관련된 컴포넌트들간의 상호작용 관리뿐만 아니라, 조립될 수 없는 컴포넌트들간의 문제를 보완하여 연결한다. 아직 실용적으로 사용할 수 있는 커넥터에 관한 연구 및 구체적인 해결 방안이 미흡하다. 본 논문에서는 커넥터를 정의 하기 위한 메타모델을 제시하고, 커넥터를 실용적으로 설계하고 구현할 수 있는 5개의 주요 패턴을 제시한다. 제시된 주요패턴들은 설계 지침 및 문제 해결방안을 제공하여 이를 통해 컴포넌트 프레임워크 기반의 실용적이고 효율적인 커넥터를 구성할 수 있도록 한다. 또한, 주요 커넥터 패턴의 적용 기법 및 구현을 통한 적용 사례를 제시하여 컴포넌트의 활용성과 재사용성이 증가됨을 보인다.

• 복식
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• 제26권
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• pp.29-47
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• 1995

Today, we live in the fastly changing society, rapidly developing scientific civilization and repeatly confusing political culture. Therefore, man persuits the emotional rest in "eros" and sympathizes with eroticism. Such an eroticism represents too much in art and costume all over the world. the purpose of this study is to classify the ex-pressive style of eroticism which is the feature of the costume in the first year of 1990's and to analyze its expression meaning. This study will be a basic data of new design development and help predict the costume in the latter half of the yeat. The method of this study was performed by using the literature related to the eroticism and the study of preceeding researchers. To analyze the costume style the its implied meaning being used to express the eroticism of 1990's, the magazines(Elle, Vogue, WWD, Collections etc) and the literatures related to fashion were used. The styles and meaning of eroticism expressed eroticism by using the minimal design which exposes wholly or partly by using a transparent vinyl and a see-through clothing. The sexy style arose from the expression of social rebellion and the exposure of suppressive sex as a psychological repulsion against the older generation. 2) Deshabille style : This style is the conver-sion to the outer garment of an underwear. The excessive exposure which just concerns the inti-mate parts of the body by using the thin cloth or lace for an underwear. This style can be recognized as the beauty destruction and ugly 3) Glamour style : The style is made up of the high-grade cloth such as silk and velvet and expresses the bodily beauty. This style falls into a rebellious culture and comes from the inten-tional expression to escape the modern life which is straight and hard. 4) metallic style : This style uses variously the new material such as vinyl-coating, enamel and represents the eroticism through the original expressions.pressions.

• 한국산업보건학회지
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• 제30권1호
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• pp.10-17
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• 2020

Objectives: This study was performed to evaluate the total dust, size-selective dust, and heavy metal concentrations generated inside and outside toll booths on an expressway and to identify the source through analysis of the components of the deposited dust. Methods: A total of 32 samples were collected from eight expressway toll booths. Each total dust sample was collected using a 37 mm PVC filter attached to a personal air sampler. Heavy metal samples were collected according to NIOSH method 7300. The size-selective dust concentrations were identified using a DustMate, and deposited dust was analyzed by WD-XRF and UHR-FE-SEM. Results: The geometric mean concentrations of the total dust inside and outside the toll booths were 337.5 ㎍/㎥ and 342.7 ㎍/㎥, respectively. The overall concentrations of TSP, PM₁₀, PM_2.5, and PM1 were higher on the outside of the toll booths, as the particle size of dust was larger, and higher in the underground passage as the dust size was smaller. The real-time analysis of the dust concentrations of TSP, PM₁₀, PM_2.5, and PM1 revealed to be higher at morning and evening times than other times because of heavy traffic. The element components of deposited dust in the toll booth were related to natural sources rather than artificial sources. Among the chemical components in the deposited dust analyzed by WD-XRF, SiO₂ was the highest. For the elements analyzed by UHR-FE-SEM, C was the highest, followed by O, and Si. Conclusions: In order to reduce the dust concentrations around toll booths on an expressway, it is necessary to periodically clean surrounding areas such as underground passages, and it is also necessary to remove deposited dust inside the toll booth from time to time.