• Journal of Radiation Protection and Research
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• 제11권1호
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• pp.22-28
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• 1986

우라늄의 용존농도(溶存濃度)와 토륨의 용존농도(溶存濃度) 및 질산(窒酸)의 노르말농도(濃度)가 서로 다른 여러가지 질산(窒酸) 우라늄-질산(窒酸)토륨 혼합용액(混合溶液)을 만들어 피크노메타(pycnometer)로서 그 밀도를 측정한 후 우라늄의 용존농도, 토륨의 용존농도 및 질산의 노르말농도만의 함수로서 물함량(含量)을 결정할 수 있는 실험식을 유도하였다. 그 결과 유도된 실험식은 $W=1.0-0.358\;C_u-0.4538\;C_{Th}-0.0307\;H^+$로서 여기에서 $W,\;C_u,\;C_{Th}$ 및 $H^+$은 각각 혼합용액중(混合溶液中)의 물함량(含量)(g/cc), 우라늄의 용존농도(溶存濃度)(g/cc), 토륨의 용존농도(溶存濃度)(g/cc) 및 질산(窒酸)의 노르말농도(濃度)를 나타낸다. 유도된 실험식에 의하여 산출된 물함량을 Bouly 등(等)의 방법으로 계산한 결과치(結果値)와 비교하였는데 그 차이는 2.7%이하인 것으로 나타났다.

• 디지털융복합연구
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• 제13권5호
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• pp.169-176
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• 2015

가상사설망(VPN)은 마치 전용선으로 사설망을 구축한 것처럼 사용할 수 있는 방식을 말한다. 가상사설망의 보안성의 품질은 보안감사성, 암호지원, 사용자 데이터의 보호, 접근통제 등에 좌우되며 효율성의 품질은 패킷처리량, 전송지연, 처리할 수 있는 세션의 수 등에 좌우된다. 본 논문에서는 가상사설망의 보안성을 고려한 효율성에 관한 품질 수준을 평가하기 위해 CC(ISO/IEC 15408)와 ISO/IEC 25000 시리즈의 품질평가 표준을 근간으로 평가모델을 구성하였다. 본 연구를 통해 최근 중요성이 더욱 부각되고 있는 지식정보보안 시스템의 하나인 가상사설망의 품질수준을 CC와 ISO 품질평가 표준에 입각하여 평가할 수 있는 융합 평가체계 구축에 기여할 수 있을 것이라 사료된다.

• 농업과학연구
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• 제48권3호
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• pp.387-396
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• 2021

This study was conducted to provide basic data for efficient Hanwoo beef production by conducting a comparison of growth performance, blood metabolites, testosterone, and carcass characteristics of Hanwoo according to complete and hemi-castration. Twelve Hanwoo calves were allotted to two treatment groups as follows: CC = complete-castration and HC = hemi-castration method of removing only one testicle. At the end of the test, the body weight was 66 kg higher in HC than in CC, and the average daily gain increased by 12.6% (p < 0.05). The feed conversion ratio was significantly improved in HC compared to CC (p < 0.05). Serum cholesterol and triglyceride concentrations were significantly higher in CC than HC in both the growing and fattening periods (p < 0.05), and serum testosterone concentrations before castration were similar between HC and CC, but steadily increasing in HC after castration. Back fat thickness and marbling score were significantly higher in CC than HC in the entire period (p < 0.01). In the results of this study, hemi-castration can improve body weight gain and feed conversion ratio due to the influence of male hormones compared to complete castration, but it is considered that there will be difficulties in producing high-quality meat with a high marbling score.

• 한국산업보건학회지
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• 제19권1호
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• pp.8-15
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• 2009

This study was examined to find out asbestos exposure level the factors which affected the level at asbestos abatement sites. We visited a total of thirteen building demolition sites(3 apartments, 3 schools, 4 stores, and 3 houses) were visited to collect samples and related data from August to November, 2006. The results of this study were as follows 1. The results of an analysis of bulk samples to identify types of asbestos at the asbestos abatement sites showed that the kinds of the asbestos detected were chrysotile by 50.0%, were tremolite by 2.6%, and were the contents of chrysotile by 3 to 20%. 2. The geometric mean concentration of asbestos was 0.007 f/cc(range 0.001-0.34 f/cc) and its geometric standard deviation was 5.83. Of the samples, however, 12 exceeded the Korean Occupational Exposure Limit(0.1f/cc). 3. Of the materials, textile material had the highest concentration with geometric mean of 0.016 f/cc. When asbestos-containing materials were removed using T type tools, the geometric mean concentration of asbestos was 0.061 f/cc. The level by this method was much higher than by other removal methods. In analysis by the type of building, the geometric mean concentration of asbestos in stores was 0.042 f/cc and was higher than in other buildings. 4. The Poisson regression analysis was applied to find out the factors that affect the airborne asbestos concentration. As a result of the analysis, removal using a T type tool was the most important factor affecting the asbestos concentration(p<0.01). In conclusion, the airborne asbestos concentration(geometric mean) in asbestos abatement sites was 0.007 f/cc(0.001~0.34 f/cc), and 12(14.6%) of all samples were over the 0.1 f/cc. These results showed that asbestos abatement workers have been exposed to the high level of airborne asbestos because they have not been keeping asbestos removal rule. In accordance with increases of the number of building demolition sites, the better government regulation on asbestos abatement methods should be made and be performed well at building demolition sites.

• 기본간호학회지
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• 제14권2호
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• pp.166-172
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• 2007

Purpose: The purpose of this study was to examine the factors influencing glass particle contamination in single dose glass ampules upon opening. Method: The study was single case experimental design. Different methods of opening ampule (hand, wooden stick), different sizes of ampules(1cc, 2cc) and different sizes of needles(17gauge, 23gauge, $5{\mu}m$ filter) were evaluated. Eighteen ampules were randomly assigned in each group. The number of glass ampule particles ${\ge}10{\mu}m$ was counted by microscope. Results: There was no significant difference in the number of particles aspirated by opening methods. But number of glass particles was much lower when using 1cc ampules rather than 2cc ampules and was also much lower when using smaller size needles and needles which include a $5{\mu}m$ filter rather than larger size of needles. Conclusion: We suggest that larger bore or unfiltered needles increase the risk of aspirating more glass particles than smaller bore or filter needles. In addition, these data show that a wooden stick can be used as a method opening glass ampules.

• 대한가정학회지
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• 제49권5호
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• pp.1-10
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• 2011

To provide the basic data to manufacture superior brassiere, this study was analyzed the evaluation of wear sensation of brassiere and the satisfaction of breast type by breast circumference and volume of 182 twenties-aged women. The results were as follows: First, it was reliable to set up the cup size of brassiere by using the breast circumference. Hemispherical breast was the same as cone-shaped breast in breast classification by breast circumference and volume. Second, the breast sizes were able to classify into under 200cc, 200~300cc, 300~400cc, and over 400cc by volume, but measuring the volume was more difficult than measuring the breast circumference. Last, there were correlations between breast circumference and breast volume by breast type. And there were differences on improvement, brassiere size, and the satisfaction of breast type by breast circumference and volume. This results will give basic informations for brassiere design that reflects breast type according to breast circumference and volume for functional brassiere.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2002년도 추계학술대회 논문집 Vol.15
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• pp.27-30
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• 2002

Boron Phosphide films were deposited on the glass substrate at the low temperature, $550^{\circ}C$, $480^{\circ}C$, by the reaction of $B_{2}H_{6}$, with $PH_{3}$ using CVD. The reactant gas rates were 50 cc/min and 20 cc/min for $B_{2}H_{6}$, 50 cc/min and 40 cc/min for $PH_{3}$ and $1.5\ell$/min for $N_{2}$ carrier gas. The films were annealed for 1hour, 3hours in $N_{2}$ ambient at $550^{\circ}C$ and $400^{\circ}C$. The deposition rate was $1000{\AA}$/min and the refractive index of film was 2.6. From results of XRD measurement the films have the preferred orientation of (1 0 1). For as deposited the film, the data of VIS spectrophotometer show 75.49%, 76.71% for 1hr-annealed and 86.4% for 3hrs-annealed. From AFM datas the surface condition of obtained films are was shown $73{\AA}$, $88.9{\AA}$ and $220{\AA}$ for as-deposited, for 1hr-annealed and for 3hr annealed, respectively.

• 디지털융복합연구
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• 제13권5호
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• pp.251-257
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• 2015

침입방지시스템은 네트워크에서 공격 서명을 찾아내어 자동으로 조치를 취하여 비정상적인 트래픽을 중단시키는 보안시스템이다. 수동적인 방어를 하는 침입차단시스템이나 침입탐지시스템과 달리 침입경고 이전에 침입을 중단시키는 개념의 솔루션이다. 침입방지시스템의 보안성 성능은 보안감사, 사용자 데이터 보호, 보안 인증 등에 좌우되며 성능은 탐지시간, 처리량, 공격차단 성능 등에 좌우된다. 본 연구에서는 이러한 침입방지시스템의 보안성 성능평가를 위한 모델을 구축하기 위해 CC(Common Criteria : ISO/IEC 15408)와 소프트웨어 제품평가에 관한 ISO 국제표준을 근간으로 하여 융합 성능평가 모델을 구성하였다.

• Archives of Plastic Surgery
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• 제37권6호
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• pp.808-814
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• 2010

Purpose: The sunken chest deformity without breast asymmetry is not a rare condition encountered in augmentation mammaplasty. Therefore, failure to recognize the deformity and improper surgical plan will lead to a suboptimal result. The authors review the experience of breast augmentation in simple sunken chest patient based on retrospectively collected data. Methods: From January, 2008 to January, 2009, patients with simple sunken chest underwent endoscopic submuscular augmentation mammaplasty through axilla, using silicone implants. Patient demographics were queried and outcomes were assessed. Results: Eleven patients (22 breasts) were followed up for 8.2 months after surgery. Sunken chests were augmented with implant size of approximately 248.9 cc (range: 213~286 cc) and contralateral chest with 211.4 cc (range: 180~235 cc). Simultaneous camouflaging the chest wall depression with breast augmentation resulted in good aesthetic outcome. All of the patients were satisfied with the surgery. There were no complications among all patients. Conclusion: We have demonstrated proper surgical planning with precise implant selection to optimize results in patients with small breast and simple sunken chest. Even though asymmetry still remains after the operation, it is still considered as acceptable.

• 한방안이비인후피부과학회지
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• 제23권1호
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• pp.169-181
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• 2010

Objective : The purpose of this study was to investigate the effects of Combination therapy with Gwakhyangjeonggisangamibang and Sojangjeonggyeok on patients with verucca plana. Methods : Sixty-five patients(male 19, female 46) with verruca plana were treated with Gwakhyangjeonggisangamibang and Sojangjeonggyeok for at least 3 months. After treatment, a clearance rate was divided into 4 scales such as; complete clearance / partial clearance-good / partial clearance-poor / no change. Statistical analysis was performed by using Independent-sample t-test. Results : Mean age of patients was 30.3 and mean period of disease duration was 64.6 months. Fifty-eight patients(73.8%) showed complete clearance, nine(13.8%) partial clearance-good, and eight(12.3%) partial clearance-poor. Complete clearance group(CC group) was statistically younger than failure group and disease duration of CC group was shorter than failure group. Although treatment period of failure group was statistically longer than CC group and dosage(貼) of herbal medicine of failure group was more than CC group, failure group showed partial clearance. Conclusion : This data demonstrates that combination therapy with Gwakhyangjeonggisangamibang and Sojangjeonggyeok could be an effective and safe treatment for the verucca plana.