• 사료
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• s.42
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• pp.20-25
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• 2010

2009년은 그야말로 새옹지마(塞翁之馬 : 인생에 있어서 길흉화복은 항상 바뀌어 미리 헤아릴 수 없다)와 같은 한 해로 기억에 오래 남을 듯 하다. 2008년 말에 2009년 양돈산업을 전망할 때 미국발 금융위기에도 불구하고 국내산 돈육 공급량 부족과 환율상승 및 급변으로 인한 돈육 수입량 부족, 그리고 수급 불균형으로 대부분의 전문가들이 역대 최고의 돈가를 예상했고, 실제로 3월에 지육가격이 5,000원/지육kg(전국 비육돈 평균시세)을 상회하면서 성수기에 돈가가 6,000원/지육 kg에 육박할 것이라 기대했었다. 그러나 4월 미국에서 발생한 신종인플루엔자가 초기에 돼지에서 유래된 인플루엔자라고 보도되면서 돈육소비량이 급감하였고 이로 인해 성수기에 돈가가 오히려 하락하는 기현상을 보였다. 다행히 신종플루가 돼지와 무관하다는 사실이 밝혀지면서 소비가 회복되었고 돈가 또한 회복되어 올해는 역대 최고의 돈가가 형성될 것으로 예상되고, 여기에 국제곡물시세가 안정되면서 사료가격도 여러 차례 인하되어 양돈 농장의 수익성은 상당부분 향상될 것으로 판단된다. 하지만 신종플루 사망자가 증가하면서 지금도 여전히 돈육소비가 위축되어 있어 막연히 호황을 기대하기 쉽지 않은 실정이다. 돈가의 급등과 급락, 외부요인에 의한 경제환경의 변화로 인한 환율의 변동 및 소비량의 변화는 2009년 양돈산업에 대한 불안감을 증폭시켜 높은 돈가와 수익성에도 불구하고 전체 산업의 규모가 커지지는 못했다. 여기에 국산 돈육에 대한 소비자들의 무한 신뢰로 인해, 2008년 12월 돈육 원산지 표시제 확대 실시로 국내산 돈육 수요가 증가 하여 여전히 75% 가량의 국산 돈육 자급율을 유지함에도 불구하고 아직까지 맛의 차별화 및 도축, 유통의 안전성에 대한 확고한 신뢰 구축을 위한 브랜드 돈육 유통의 확대가 소비자의 기대치만큼 자리 잡지 못하고 있는 실정이다. 또한 친환경적인 양돈산업 육성 및 분뇨 처리 관련하여도 뚜렷한 해답을 찾지 못하고 있어, 양돈 농가의 입장에서는 규모의 확장 및 신규 진입이 극도로 제한되어 있고 일부 지역에서는 사업의 존폐를 결정하는 주요 원인이 되고 있다. 그간 대한민국 양돈 산업의 경쟁력에 발목을 잡고 있던 낮은 생산성 문제와 소모성 질병에 의한 높은 폐사율 문제 또한 아직도 여전히 해결되지 못한 과제이다. <그림 1> 국가별 양돈 농장 생산성 현황에서 보는 바 와 우리나라 양돈 농장의 생산성은 여전히 PSY(모돈당 연간 이유자돈 두수)가 18두에 못 미치고 있어 국제 경쟁력을 논하기 자제 가 부끄러운 실정이다. 여러 가지 내 외부적인 어려운 환경에도 불구하고 올 2009년은 양돈농가들이 최고의 수익성을 기록한 한 해가 될 것이라는 사실에는 이의가 별로 없을 듯하다. 2년 여간의 고돈가로 인해 대한민국 양돈산업은 새로운 도약을 위한 밑천이 마련된 셈이라고 할 수 있다. 본고에서는 2009년 양돈산업 현황을 돌아보고 다가올 미래를 준비한다는 의미에서 우리나라 양돈산업이 집중해야 할 분야를 짚어보고자 한다.

• Journal of the Korean Institute of Gas
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• v.23 no.4
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• pp.40-45
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• 2019

This paper is a purpose to study the failure example for heavy-duty vehicle fire. The first example, the researcher found the engine over-heating phenomenon causing a coolant leakage by the sealing poor of head-gasket because of D-ring part deformation contacting with cylinder liner top-part and cylinder head. He certified a fire breakout by short transferred to surrounding wiring of air-cleaner. The second example, a brake lining by return fault of break operating S cam causing with much wear of a rear 4 wheel brake lining repeatably was worn by friction. In the long run, it became the cause of fire. The third example, the researcher knew the fire cause was came about the short of wire by overload of tilting motor when the driver tilted up the cap to inspect a engine. Therefore, a heavy-duty fire must minimize the fire occurrence by thorough controlling.

• The Journal of the Korea Contents Association
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• v.19 no.6
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• pp.368-378
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• 2019

This study examined the differences of importance and performance perception level among the food & beverage festival attributes of visitors participating 'Daegu Chimac Festival' and also conducted importance-performance analysis (IPA) of food & beverage festival Attributes. The results were as follows: firstly, food & beverage festival attributes were grouped into four factors such as 'sanitation environment', 'food taste and variety', 'food quality and supplementary service' and 'food purchase convenient.' Secondly, the 4 factors and 21 items of festival attributes showed statistically significant differences in their levels of importance and performance. Finally, results of the questionnaire survey of 322 visitors at '2018 Daegu Chimac Festival' indicated that 'food purchase convenient' and 'food taste and variety' were important to visitors and had high performance. Although attributes related to 'food quality and supplementary service' had an low importance and low performance, and also 'sanitation environment' had an low importance and high performance in the IPA results, they were identified as the key determinants affecting food & beverage festival' success.

• Journal of Food Hygiene and Safety
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• v.34 no.3
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• pp.309-315
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• 2019

To enumerate Staphylococcus aureus in food, Baird-Parker Agar (BPA) is usually used in the conventional method, However it requires time and space for the preparation and plating, and incubation. Thus, use of the $3M^{TM}$ $Petrifilm^{TM}$ Staph Express Count Plate (STX Petrifilm) might be appropriate to solve these challenging problems. The purpose of this study was to compare the efficiency of STX Petrifilm with BPA for enumeration of S. aureus in various foods. A mixture of S. aureus strains ATCC29213, ATCC25923, and ATCC13565 was inoculated on marinated pork chop, beef (chuck tender), dried filefish, semi-dried squid, rice cake, and Japchae (stir-fried glass noodles) at 2, 3, 5, and 7 Log CFU/g. S. aureus cell counts were enumerated by spread-plating on STX Petrifilm and BPA after 0 and 24 hours at $4^{\circ}C$ (marinated pork chop, beef, semi-dried squid, and stir-fried glass noodles) and $25^{\circ}C$ (dried filefish and rice cake). Recovery of STX Petrifilm for S. aureus from various food samples was compared with BPA, and the results showed that there were no significant differences between two selective media in all cases. The results indicated that STX Petrifilm had enough efficiency to recover S. aureus from various foods as well as saving time and space.

• Journal of Korean Library and Information Science Society
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• v.54 no.1
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• pp.25-44
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• 2023

This study was to prepare a development plan for nationwide authority control system based on national authority sharing system of NLK through the survey targeting on libraries which do not participate in the system. Six plans were suggested to establish a nationwide authority control system based on this survey. First, an authority data construction module and a module linked to the national authority sharing system should be developed. Second, describing external identifiers such as ISNI to the national authority sharing system is to provides reliability of data and to utilizes to build linked data. Third, it is necessary to prepare strategies for promoting the national authority sharing system and diversifying services. Fourth, both authority establishment and non-establishment show difficulties and diversity in the selection and description of authorized access point, so it is necessary to prepare rules related to authorized access points. Fifth, since the data described in authority records is not enough, it is necessary to improve and upgrade authority records by using bibliographic records. Sixth, it is necessary to educate librarians about the necessity and function of authority control. As such, this study is meaningful in that it investigated the current status and requirements of libraries that do not participate in the nationwide authority system and sought ways to establish a nationwide cooperative authority control system.

• Nuclear Engineering and Technology
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• v.27 no.6
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• pp.877-887
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• 1995

YGN 3 is the first nuclear power plant to use the Core Protection Calculator (CPC) as the core protection system and the Core Operating Limit Supervisory System (COLSS) as the core monitor-ing system in Korea. The CPC is designed to provide on-line calculations of Departure from Nucleate Boiling Ratio (DNBR) and Local Power Density (LPD) and to initiate reactor trip if the core conditions exceed the DNBR or LPD design limit. The COLSS is designed to assist the operator in implementing the Limiting Conditions for Operation (LCOs) in Technical Specifications for DNBR/Linear Heat Rate (LHR) margin, azimuthal tilt, and axial shape index and to provide alarm when the LCOs are reached. During YGN 3 initial startup testing, extensive CPC/COLSS related tests ore peformed to ver-ify the CPC/COLSS performance and to obtain optimum CPC/COLSS calibration constants at var, -ious core conditions. Most of test results met their specific acceptance criteria. In the case of missing the acceptance criteria, the test results ore analyzed, evaluated, and justified. Through the analysis and evaluation of each of the CPC/COLSS related test results, it can be concluded that the CPC/COLSS are successfully Implemented as designed at YGN 3.

• Nuclear Engineering and Technology
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• v.18 no.1
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• pp.1-8
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• 1986

A magnetic quadrupole doublet was fabricated for use at the pre-target position of SNU 1.5MV Van de Graaff accelerator and then its optical characteristics were measured and analysed. The physical dimensions are: pole length 180mm, aperture radius 25mm, pole tip radius 28.75mm. Material for poles and return yokes is carbon steel KS-SM40C. Coils have 480 turns per one pole and air-cooling is adopted. Applying the d.c. current 2.99$\pm$0.03A to the lens, and using the Hall probe, magnetic field elements $B_{\theta}$ , $B_{\gamma}$, were measured at the selected Points along each coordinate direction r,$\theta$, z. From the area integration and orthogonal polynomial fitting for the measured data, the magnetic Field gradient G=566.3$\pm$2.1 gauss/cm at lens center, the effective length L=208.3$\pm$1.44mm along the lens axis have been obtained. The harmonic contents were determined up to 20-pole from the generalized least squares fitting. The results indicate that sextupole/quadrupole is below 1.4$\pm$0.9% and all the other multipoles are below 0.5% in the region within 18mm radius at the center of lens.

• The Journal of Engineering Geology
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• v.32 no.1
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• pp.13-26
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• 2022

Calcite twins were analyzed in six oriented samples of the Pungchon limestone, Joseon Supergroup, to reconstruct the paleostress field. The orientations of c-axis of calcite and e twin plane were measured along with the average thickness and numbers of twins, and the widths of calcite grains. Twin strain, mean width, and intensity of twinning, and the relative magnitude and orientations of principal stresses were calculated using Calcite Strain Gauge program. Twin strain, mean width, and intensity of twinning showed ranges of 1.09-15.36%, 0.53-3.72 ㎛ and 21.0-53.1 twim/mm, respectively. Metamorphic temperatures calculated from the twins were 170-200℃, indicating that the twins developed after the Pungchon limestone was uplifted to at least half of the maximum burial depth. Results for five of the samples indicate that the calcite twins formed during two events with principal stress axes of different orientations, while the remaining sample recorded only one event that produced calcite twins. The axis of maximum compressive stress was oriented mainly WNW-ESE to ENE-WSW, and to a lesser degree NW-SE and NE-SW. Comparison of paleostress orientations measured here and in other studies indicates that most twins were produced during the Songrim orogeny. However, the Daebo orogeny and the Bulguksa orogeny also produced calcite twins in the Punchon limestone.

• Journal of the Korean Society of Radiology
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• v.81 no.1
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• pp.135-146
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• 2020

Purpose To describe magnetic resonance imaging (MRI) findings in 10 cases of Toxocara canis myelitis and to analyze these findings to aid in the diagnosis of this condition. Materials and Methods From June 2015 to March 2018, we retrospectively analyzed the electronic medical records and MR images of patients who were diagnosed with Toxocara canis myelitis. The analysis of the MR images was based on a discussion between an experienced spinal radiologist and a radiology resident. Results This study classified MRI findings into the following two types. Type 1 was defined as central and diffuse T2 high signal intensity on the axial plane, which was observed in 50% of all cases. All lesions showed avid enhancement, mostly in the posterolateral or posterior region (4 cases, 80%). Type 2 was defined as wedge-shaped or focal T2 high signal intensity in the posterolateral or posterior region and corresponded to the remaining 50% of the cases. In this case, the extent of the lesion was relatively small and contrast enhancement was observed in only one case. Conclusion This study revealed that various imaging findings could be observed in cases of Toxocara canis myelitis, and the findings were classified into two types.

• Journal of Christian Education in Korea
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• v.77
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• pp.171-201
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• 2024

Purpose of Research : Since ChatGPT's 2022 release, the educational sector faces mixed reactions to generative AI, sparking innovation but raising concerns about student cognition and communication. While Christian colleges employ AI reflecting their values, secular institutions stress ethical usage. This study explores ethical AI use in these settings, aiming to integrate findings into educational practices. Research content and method : Analyzing AI use and ethics guidelines from 50 domestic and international universities, differences between Christian and secular institutions were explored. Data was categorized, conceptualized via open coding, and components were identified through axial coding. The importance of components for Christian colleges' AI guides was assessed based on the initial data and previous research, leading to the development of tailored AI utilization components for Christian universities. Conclusion : Studies revealed secular institutions have six AI guide components, while Christian colleges found seven in both utilization and ethics guides, focusing on truthfulness, responsibility, and diversity. Emphasizing the need for ethical AI use in Christian colleges, the findings advocate developing AI ethics guidelines to aid marginalized groups and establish a new educational paradigm through further research.