고능력 젖소 축군의 집단번식관리프로그램 적용에 의한 번식효율의 개선

노경수,김의형,남현욱,서국현,강현구,김일화 충남대학교 형질전환복제돼지연구센터 2004 논문집 Vol. No.8

We investigated the effect of reproductive herd health program (RHHP) on the reproductive performance in high yielding dairy herds. Data collected from 205 lactations at Boeun County, Chungbuk from April 2001 to Dec. 2003 included postpartum reproductive and metabolic diseases, body condition score (BCS), reproductive performance and milking records. First we compared the reproductive performance of cows without RHHP (pre-RHHP group) and cows with RHHP (RHHP group). Intervals from calving to first service (99.6 vs. 81.8 days) and to conception (160.3 vs. 131.8 days) were shorter in the RHHP group than in the pre-RHHP group. Secondly, we determined the effect of milk yield (305 days) on the occurrence of postpartum diseases, BCS changes, and reproductive performance in cows under RHHP, The occurrence of metritis and metabolic diseases were greater in the over-10,000 kg group than in the under-l0,000 kg group. The over-10,000 kg group lost more body condition than the under-10,000 kg group from calving to month 3 postpartum. Nevertheless, reproductive performance did not differ between the two groups. These results indicate that reproductive performance can be improved by the application of RHHP in high yielding dairy herds and that reproductive performance in the cows under RHHP are not affected by high milk yielding.

1988 년 가을 강원도 영서지역에서 발생한 쭈쭈가무시병 24 예의 임상적 관찰

최동성(Dong Seong Choi),이광훈(Kwang Hoon Lee),박진현(Jin Hyun Park),신계철(Gae Chul Shin),조한선(Han Sun Jo),심영학(Young Hak Shim),윤갑준(Gap Jun Yun),백일기(Ill Ki Baek),임채선(Chae Sun Im),호휘남(Whi Nam Ho) 대한내과학회 1989 대한내과학회지 Vol.37 No.3

N/A We obserbed 24 cases of tsutsugamushi disease occur- ring in the Gang-Won-Do area from September to October 1988, which were confirmed by indirect immunofluorescent antibody test, and analysed their clinical findings. On physical examination eschars which can be a clinical clue to tsutsugamushi disease in the early stage of infection were recorded in 11 cases (45%). Common laboratory features included thrombocytopenia in 19 cases (95/o), and increased SGOT in 22 cases (92%), SGPT in 49 cases (79%), LDH in 19 out of 20 cases (95%) tested, CK in 7 out of 20 cases (35%) tested and serum ADA level in 12 of 13 cases (92%) tested. Serum fibrinogen was decreased in 5 of 13 cases (38%) tested, FDP was positive in 8 of 13 cases (62%) tested and prolonged prothrombin time was observed in 9 cases (38%). When IgM and IgG titers were measured separately, two distinct responses were seen. The IgM titers gradually declined during the period from 14-40 days. The IgG responses in the same patients developed more slowly. In our study, tsutsugamushi disease was a mild to severe febrile illness of 1 to 2 weeks duration. We think that more concern about tsutsugamushi disease is necessary because of possible mortality in poorly treated cases as well as a need for more precise differential diagnosis of acute febrile illness.

석면관련 폐질환의 진단에 있어서 흉부고해상도전산화단층촬영검사(HRCT)의 유용성

이현재,손지언,,홍영습,,이영일,예병진,유창훈,정갑열,김상훈,임형준,장은철,김정만,김준연 大韓産業醫學會 2006 대한직업환경의학회지 Vol.18 No.2

목적: 석면에 노출된 근로자에서 석면관련 폐질환의 양상을 분석하고 진단에 있어 HRCT의 유용성을 연구하여 석면에 대한 의학적 감시프로그램의 개발에 기여하고자 하였다. 방법: 석면에 직접 노출되는 작업자 68명과 간접 노출되는 작업자 94명 등 총 162명에 대해 OSHA 석면 표준, 의학적 감시 프로그램에 따라 단순 흉부방사선검사, 폐활량검사 및 우리나라 실정에 맞게 일부 수정한 의학적 설문지를 통해 면접조사의 방식으로 환자에 관한 정보를 수집하였으며, 자료의 신뢰성을 확보하기 위하여 면접조사는 1달 이상의 기간을 두고 2차례에 걸쳐 실시된 후 확인, 수정하였다. 또한, 석면관련 폐질환을 확진하기 위하여 HRCT를 추가적으로 실시하였다. 결과: HRCT결과 석면관련 폐질환의 유병율은 162명의 근로자중 17명으로 10.5%였는데, 직접 노출군에서 10명 (14.7%), 간접 노출군에서 7명 (7.4%)이었다. HRCT와 비교할 때 단순 흉부방사선검사의 민감도와 특이도는 각각 70.6%와 98.6%이었고, 양성 예측도와 음성 예측도는 각각 85.7%와 96.6%으로, HRCT는 단순흉부방사선검사에 비해 민감도가 높아 초기 석면관련 폐질환을 진단하는데 효과적이었다. 석면관련 폐질환의 진단에 있어 HRCT와 폐활량검사 사이에 유의한 관련성이 관찰되었다. HRCT 결과 석면관련 폐질환의 유무와 의학적 설문조사 결과의 빈도분석을 실시한 결과, 유의한 변수는 작업기간, 흡연량, 호흡기질환의 과거력, 기침, 호흡곤란이었다. 결론: HRCT는 석면관련 폐질환의 진단에 있어 단순 흉부방사선검사와 비교하여 민감도가 높아 초기 진단에 유용하므로 단순 흉부방사선선검사 결과 석면관련 폐질환소견을 보일 때뿐만 아니라, 정상소견을 보이더라도 폐활량 검사결과와 근무력, 흡연력, 호흡기질환의 과거력, 기침, 호흡곤란 등의 호흡기 증상을 참고하여 HRCT검사를 고려해야 한다. 또한, 본 연구에서 관련성이 없었던 요인들에 대해서도 향후 연관성을 규명하는 광범위한 전향적 연구가 필요하다. Objectives: This study was carried out to improve the medical surveillance program of workers exposed to asbestos by examining the usefulness of High Resolution Computed Tomography (HRCT) in the diagnosis of asbestos-related lung disease. Methods: The study subjects comprised 162 workers in a ship-repairing yard, 68 of whom had been directly exposed to asbestos and 94 indirectly exposed. The 'Occupational Safety & Health Administration (OSHA) asbestos standard, medical surveilance program' and HRCT were conducted to analyze the aspects of the asbestos-related lung disease. The OSHA asbestos standard, medical surveilance program consists of simple chest x-ray, spirometry and medical questionnarie. Results: Seventeen (10.5%) of the 162 subjects, 10 (14.7%) directly exposed and 7 (7.4%) indirectly exposed, revealed asbestos-related lung disease on HRCT. The sensitivity and specificity of simple chest x-ray for asbestos-related lung disease were 70.6% and 98.6%, and the positive and negative predictive values were 85.7% and 96.6% respectively, as compared with HRCT, HRCT was an effective diagnostic tool especially to detect early asbestos-related lung disease. The study results indicated a relative significant association between the results of spirometry and HRCT. The variables significantly associated with asbestos-related lung disease on HRCT were work duration, smoking history (pack-years), past history of respiratory disease, cough and dyspnea. Conclusions: In the diagnosis of asbestos-related lung disease, HRCT should be considered not only for workers with positive findings on simple chest x-ray, but also workers with specific findings on spirometry, occupational history, smoking history, and past history of respiratory disease, or with respiratory symptoms such as cough and dyspnea.

주거지역에 따른 남·여 중학생의 체격 및 체력 발달추이

최현주,오수일 江原大學校附設體育科學硏究所 2004 江原大學校附設體育科學硏究所論文集 Vol.- No.27

The purpose of this study was to provide basic information to physical educators. at fields by investigating developmental change at physique and physical fitness of male/female middle school from 1st grade to 3rd grade students from 4 type of residential areas at Gangwondo (urban/rural/sea/mine area), and by confirming the reasons of change through analysis of BMI tendency. The subject was selected as appointing each 100 persons of male/female middle school 3rd students randomly from 4 areas, and performed analysis about the developmental difference according to subject's residential area and the increase ratio according to grades based on data from health record, then also examined BMI. Average/standard deviation of male/female physique & physiacal fitness was calculated respectively as well as in creased amount with collected data, and two-way ANOVA analysis was performed to compare physique and physical fitness. one-way ANOVA analysis was also performed to examine difference per residential area according to grades in case a correlation was observed between grades and residential area. The conclusions is as follows; 1. In the matter of male students, height , weight, chest, sitting height and fatness at urban area showed the highest value, and weight of rural area, height of sea area, chest of mine area showed lower value respectively. Amount of annual increase of height and weight was observed significantly from 1st grade to 2nd grade than from 2nd grade to 3rd grade, and male students of urban area showed highest value among overall school years. Chest of rural area showed the highest increase degree from 2nd grade to 3rd grade th from 1st grade to 2nd grade while no significance was onserved among school years at sitting height except slight decrease tendency as promotion to higher school year. Fatness in urban area showed the highest value for all school years with many cases of over-weight among 4 areas that indicates fatness is arising according to increase of weight and height. 2. In the matter of female students, no significance was observed at heigh, weight, chest according to their residential area, and amount of increase of weight and sitting height even decreased as promotion while mine area showed the highest degree of increase. No significant different was also found at fatness according to residential areas while 1st grad at sea are, 2nd grade at mine area and 3rd grade at urban/mine area showed higher frequency at over-weight case. 3. In the matter of male students, much higher record of 50m sprint was observed at rural/mine area, and the record of mine area increased most significantly as promotion. Overall tendency of increase was found as promotion at total area, and annual development decreased as being 2nd grade except urban area in which high improvement was observed. Similar feature was found at sit-up and urban area showed higher improvemendt of 2nd grade and 3rd grad. Mine area showed high record of standing long jump at 1st grade and 2ne grade while rural area shoued the highest impromement from 1st grade to 3rd grade. 1st grade of urban area, 2nd grade of rural area and 3rd grade of mine area showed high record at sit-stretching, and the highest improvement was observed at mine area from 1st grade to 3rd grad. Continuous improvement was found at running/walking long according promotion as 1st grade/3rd grade at sea area and senior at mine area showed the highest record respectively. 4. In the matter of female students, there was no significance at 50m sprint according to residential area as well as at degree of improvement by promotion. 1st grade of urban area, 2nd grade of sea area and 3rd grade of mine area showed the greatest record at 50m sprint. Hang-down record of rural area and sit-up record of urban area showed the highest one among whole school years respectively. The highest improvement degree from 1st grade to 3rd grade at standing long jump was found at ural/mine area. General improvement as promotion at sit-stretfhing was record at running /walking long while 3rd grade of rural area showed high one. It was observed that the record is decreasing according to promotion.

남사천 하류지역 홍수피해 분석 연구

김가현,김미룡,서진호,민일규 慶南專門大學 2000 論文集 Vol.28 No.1

Omegatron質量分析計에 의한 TiO_2熱分解에 關한 硏究

朴一鉉 成均館大學校 1969 論文集 Vol.14 No.-

The gases evolved during a vacuum reduction treatment of extra pure TiO_2 in the temperature range 800℃∼1300℃, were analyzed by means of the omegatron mass spectrometer which has high sensitibity. No oxygen evolved was detected but the principal products of thermal decomposition were found to be carbon dioxide, carbon monoxide which is reduction products of TiO_2 by impurity carbon contained in rutile crystal. The results establish that the defect structure with oxygen vacancy of non-stoichiometric non-conducting rutile gained by carbon contained on crystal surface. According to this conclusion, the thermodynamic properties of dissociation of oxygen in non-stoichiometric rutile have been calculated. It gives a calculated oxygen dissociation pressure at 1200℃ of only 8.70×10 exp (-20) atmos. And then the value of the heat of formation of 1 mole of oxygen vacancy is seen to be △H^o=104.2㎉/mole.

가변샘플링기법을 이용한 합성관리도의 개발

송서일,박현규 한국품질경영학회 2005 품질경영학회지 Vol.33 No.1

This paper develops a new VSI X￣-CRL synthetic control chart that considers convenience of use in the field, and perception of change of process applying VSI techniques to synthetic control chart, simultaneously. We found the optimal sampling interval and various control limit factor of the suggested chart using markov chain. Comparison and analysis is carried out between synthetic VSI X￣-CRL chart and other chart in the statistical aspect; X￣ control chart, VSI X￣ chart, another synthetic chart. In case that the process follows normal distribution, the proposed VSI X￣ -CRL synthetic control chart in detecting process mean shift showed the best performance in aspect of statistical performance, regardless of control limit L of CRL/S control chart.

남사천 하류지역 홍수피해 분석 연구

김가현,이승휘,서진호,민일규,이영재 동아대학교 건설기술연구소 2000 硏究報告 Vol.24 No.1

Where no records are available at a site, a preliminary estimate may be made from relations between floods and catchment characteristics. Anumber of these characteristics were chosen for testing and were measured for those catchments where mean annual flood estimates were available. Although the improvement using extended data in regression of flood estimates on catchment characteristics was small, this may be due to the limitations of the regression model. When an individual short term record is to be extended, more detailed attention can be given; an example is presented of the technique which should be adopted in practice, particularly when a short term record covers a period which is known to be biassed. A method of extending the peaks over a threshold series is presented with a numerical example. The extension of records directly from rainfall by means of a conceptual model is discussed, although the application of such methods is likely to be limited by lack of recording raingauge information. Methods of combining information from various sources are discussed in terms of information from catchment characteristics supplemented by records, but are generally applicable to different sources of information. The application of this technique to estimating the probable maximum flood requires more conservative assumptions about the antecedent condition, storm profile and unit hydrograph. It is suggested that the profile and catchment wetness index at the start of the design duration should be based on the assumption that the estimated maximum rainfall occurs in all durations centered on the storm peak.

PSTN을 이용한 화상 전화시스템의 음성 보코더

남현도,남일룡 단국대학교 1999 산업기술연구 Vol.1 No.-

This paper presents real-time implementation of a speech vocoder for ITU(International Telecommunications Union) H324 video telephony on the PSTN(Public Switched Telephone Network) using ITU G.723 16Kbps ADPCM(Adaptive Differential Pulse Code Modulation) algorithm. ITU H.324 is a new standard for low bit-rate multimedia communication that provides a foundation for interoperability and high quality video, voice and data based phone calls. The encoder using proposed algorithm accepts 8-bit PCM(Pulse Code Modulation) compressed sign민 and expends them to a 14-bit-per-sample for processing. The predicted values are subtracted from these 14-bit values to produced difference signals that are fed to the quantizer. Adaptive quantization is performed on the difference signals to produce a 2-bit output for transmission over the channel. At the decoder, the 2-bit transmitted values are used to update the inverse adaptive quantizer, whose output is a dequantized version of the difference signals. These dequantized values are added to the values generated by the adaptive predictor to produced the reconstructed speech signals. Computer simulations were performed to evaluate the performance of the speech vocoder that implemented by proposed algorithm.

구기자나무의 잎절편체로 부터의 Callus와 부정근유도에 미치는 영향

설일환,안인숙,조현제 대구산업정보대학 2000 논문집 Vol.14 No.2

Punctured leaf segments from Lycium chinense Mill. were cultured on the 3 different types of medum (B5, MS, WPM) containing different concentrations of auxins (2,4-D and NAA). After 12 weeks in culture, high amount of white and/or yellowish colored callus and number of roots were induced successfully. Among tested three types of medium, WPM containing 10μM of 2,4-D produced calli over 2 g per plate and the same medium containing 20μM NAA produced over 20 roots per leaf segment. The leaf segments on WPM showed the best responses unlike two medium, and lower concentrations of auxins showed the best results on inducing callus and producing adventitious roots. While comparing with control, callus induction did not occur however spontaneous roots were occurred resulting from that endogenous auxin contents in lycium leaf segments are high enough to induce. Currently, large scale of lycium cell culture is proceeding under the suspension culture methods and undergoing regeneration research for genetic transforamtion of Lycium chinense Mill..