바닥복사냉방의 공동주택 현장적용에 관한 연구

조영흠,임재한,여명석,김광우 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1

The objective of this study is to analyze the applicability of the Radiant Floor Cooling integrated with dehumidification system through field experiments. The experiments are performed to evaluate the thermal environments and system operations according to varying the load conditions which is able to happen to field and show the available cooling source for radiant cooling system. The results of this study are as follows. 1) The radian floor cooling integrated with dehumidification system shows stable thermal environments and system operations in view of these aspects : control offset room air temperature, preventing condensation, stayed within the comfort range. 2) A supplementary cooling device can reduce the cooling time at the beginning because it can utilize radiant and convective cooling method. 3) The result of analyzing the change of the cooling water temperature in the actual apartment building shows that the system can operate according to the planning value.

IMT-2000용 광중계기 개발

임재봉,조기현 국민대학교 생산기술연구소 2002 공학기술논문집 Vol.25 No.-

This paper presents an analog optic-repeater system for the wideband CDMA IMT-2000 service. The presented system has achieved the requirements of optic-repeater system for SK Telecom, which are based on the 3GPP(3^(rd) Generation Partnership Projects) standards. Furthermore, the repeater system of this paper can transmit 4FAs wideband CDMA optic-signals up to 40Km distances. Several experiments on the achieved repeater system have been performed to show the validities of this paper.

Possibility of Application of Artificial Insemination Buffer (AIB) for Increasing of Production Efficiency of Female Cow Offspring

Jae‐Il Bang,A‐Na Ha,A‐Ra Cho,Kyeong‐Lim Lee,MD. Fakruzzaman,Il‐Keun Kong 한국동물생명공학회(구 한국동물번식학회) 2011 발생공학 국제심포지엄 및 학술대회 Vol.2011 No.1

The present research was carried out to evaluate the possibility of female offspring production using artificial insemination buffer (AIB) before artificial insemination (AI). To do it, we carried out the optimization of AIB, making of AIB gun and analysis of affecting AI rate after AIB treatment. AIB made with the base of Tris‐buffer supplemented with L‐arginine and several materials that could be reduced the motility of male sperm compared with female one. This mean that female sperm could be increased the possibility of fertilization with ovum compared with male one. AIB must be deposited into 2nd to 4th cervix by the guide of AIB gun. After 15 min of AIB insertion, frozen semen was deposited into same place after. Total 352 cattle were inseminated with AIB insemination and was not significant difference between AIB and traditional AI rate (56.8 vs. 55.7%). However, AIB AI rate was significantly differs among 12 different farms. The parturition number of cows did not effect on AIB AI rate among 1st to 7th parturition number of cows. The proportion of AIB AI success rates in hanwoo cows was significantly higher than in dairy cows (61.0% vs. 48.7%), but the average AI success rate was not different between AIB and conventional AI (56.8% vs. 55.7%). The female offspring production rate in 2nd to 4th cervix deposition place was significantly higher than in uterus body (77.7% vs. 59.6%, p<0.05). The injection volume of AIB in 5 and 10 ml was significantly higher than in 2 ml (77.7, 78.7 vs. 51.8%, p<0.05), but not different between 5 and 10 ml ABI volume. The best exposure time of AIB in the cervix was 10 and 15 min rather than that of 5 min (79.2%, 77.2% vs. 63.2%, p< 0.05), and so AIB have to expose at least 10 min to get higher female offspring. In conclusion, AIB could be used in AI industry to produce female offspring and also AIB AI can be increased the AI success rate compared with traditional AI rate.

관상동맥질환의 중증도와 혈중지질치 및 아포지단백과의 상관관계

임현주,황종현,류재근,정병천,조용근,채성철,전재은,박의현 慶北大學校 醫科大學 1997 慶北醫大誌 Vol.38 No.1

목적 : 관상동맥질환의 위험인자로서 혈청지질 및 혈장 지단백에 대한 관심이 높아지고 있고 또 아포지단백이 관상동맥 질환을 일으키는데 다른 지질보다 더 중요하다는 연구가 많이 발표되고 있으나 우리나라에서는 아포지단백에 대한 연구가 그리 많지 않은 편이다. 이에 저자등은 혈중지질치와 새로운 위험인자로 알려지고 있는 아포지단백치를 측정하고 이들과 관상동맥질환 중증도와의 상관 관계를 알아보았다. 대상 및 방법 : 관상동맥질환이 의심되어 관상동맥조영술을 실시한 69명의 환자를 대상으로 하였으며 12시간 이상 공복후 혈청을 채취하여 총콜레스테롤, 중성지방, HDL-콜레스테롤, 아포지단백 AI (ape AI), 아포지단백 B (ape B)를 측정하였다. 관상동맥조영상 50%이상의 협착이 있는 혈관의 수 (lesion number), 최대협착을 합한 값 (lesion score), 각 분절의 최대협착을 합한 값 (total score), 가장 심한 협착 값 (peak stenosis) 등으로 관상동맥 중증도를 알아본 다음 이들과 혈청지질치, 아포지단백과의 상관 관계를 비교해 보았다. 상관 관계는 Spearman's correlation coefficient를 구하였다. 결과 : 관상동맥질환의 중증도와 각 지질치 간의 상관 관계를 비교해 보았을때 lesion number와 관계있는 것은 연령 (r=0.2789), 중성지방치 (r=0.2829)이며 lesion score와 관계있는 것은 연령(r=0.2911), 중성지방치0 (r=0.3316), 총콜레스테롤과 HDL-콜레스테롤의 비 (r=0.2361), apo B 치(r=0.2759), apo AI과 apo B의 비 (-0.3154)로 나타났다. Total score는 연령 (r=0.3100), 총콜레스테롤치 (r=0.2452), 중성지방치 (r=0.3022), 총콜레스테롤과 HDL-콜레스테롤의 비 (r=0.2770), apo B치 (r=0.2927), apo AI과 apo B의 비 (r=-0.3408)와 연관이 있었고 peak stenosis는 중성지방 치(r=0.3305), ape B 치 (r=0.2968), apo AI과 apo B의 비 (r=-0.3977)와 관계가 있었다. 연령으로 조정하여 partial correlation을 좌면, 관상동맥조영술상 중증도는 중성지방치 (r=0.3408), apo B 치(r=0.2877), apo AI과 apo B의 비 (r=-0.3460)와 유의한 상관 관계가 있었다. 이중 ape AI과 ape B의 비는 lesion score (r=-0.2640), total score (r=-0.3057), peak stenosis (r=-0.3460)와 유의한 상관관계를 보였다. 결론 : 이상의 결과로 보아 apo B치 그리고 apo AI과 apo B의 비가 관상동맥 중증도의 예견인자로 다른 혈중 지질 치보다 더 유용하다는 것을 알 수 있었다. Objectives : Recently, it was reported that the measurements of apolipoprotein levels may be valuable in the clinical assessment of coronary artery disease severity. However there are a few reports regarding to the relationship between coronary artery disease severity and apolipoprotein levels in Korea. Thus, we measured serum lipid and apolipoprotein levels and studied the relationship between coronary artery disease severity and serum lipids and apolipoproteins levels. Subjects and Methods : The 69 patients who underwent coronary angiography to evaluate chest pain were subjected to this study. We measured the levels of serum cholesterol, triglycerides, HDL cholesterol, apolipoprotein AI(apo AI) and apolipoprotein B(Apo B) and measured the severity of coronary artery disease by lesion number, lesion score, total score and peak stenosis. Then, we studied the relationship between coronary artery disease severity and apolipoproteins and calculated the correlation coefficient. Results : The results were as follows. There are significant correlation(r=0.3) between age, triglycerides, apo B levels, apo AI/B ratio and coronary artery disease severity. In controlling for age, tyiglycerides, apo B levels and apo AI/B ratio shows significant correlation(r=0.3) with coronary artery disease severity. Especially, apo AI/B ratio shows significant correlation(r=0.3) with lesion number, total score and peak stenosis. Conclusion : These results suggest that the apo B levels and the ratio of apo AI/B can be used as significant independent predictor for coronary artery disease severity rather than other serum lipid levels.

공동주택 현장 실험을 통한 바닥복사냉방의 성능평가

조영흠,임재한,석호태,여명석,김광우 대한건축학회 2004 대한건축학회논문집 Vol.20 No.11

The objective of this study is to analyze the performance evaluation of the Radiant Floor Cooling and the dehumidification system included in the integrated system may be utilized as a supplementary cooling device through field experiments. The experiments are performed to evaluate the performance of the radiant floor cooling and confirm the possibility of continuous cooling through the actual field experiments, moreover, analyze specific characters of the radiant floor cooling system according to varying the load conditions which is able to happen to field. Experiment results show that the permissible ambient temperature range was determined by cooling load calculations, and the cooling capacity was calculated from steady-state heat transfer equations. Under these conditions, experiments were performed for an actual apartment building assuming two occupants. During 80% of the cooling period, radiant floor cooling provides sufficient and continuous cooling. The results of analyzing the indoor thermal environment in the actual apartment building show that the set room air temperature is maintained while the floor surface temperature, vertical temperature distribution and PMV remain within the comfort range.

골재생산과 관련한 터널작업에서 효율적인 심빼기 발파공법

임한욱,김재홍,조영동 강원대학교 부설 석재복합신소재 제품연구센터 2000 석재연 논문집 Vol.5 No.-

실린더 컷 심빼기 공법은 일반적으로 터널단면에 관계없이 널리 쓰이는 방법이다. 본 연구에서는 종래의 실린더 컷 공법을 개선한 새로운 방법을 제안하였다. 제안한 방법의 특징은 발파당 굴진장을 증대시킬수 있는데 이를 요약하면 다음과 같다. 발파당 굴진장은 평균 3.8m 이상으로 종래의 심빼기 바법 경우 천공장의 90~95% 인데 비하여 제안한 방법은 천공장의 99.5%까지 가능하다. 또한 비장약량은 1.363에서 1.297 kg/㎥로 약 5%가, 비천공장은 2.393에서 2.130 kg/㎥로 약 8%가 감소되었다. 이외에 발파진동, 비산거리, 파쇄입도면에서도 종래 방법보다 양호함을 확인하였다. The cylindrical cut is most frequently used in tunnelling regardless of their dimensions. In this study the new parallel cut is proposed to raise advance per round, which is considered to be an elevation of the traditional cylinder cuts. The main results of this study are as follows; The average advances per rounds in new cuts can reach 99.5% of drilling length. That of traditional cylinder cuts are known approximately 90~95%; Specific charge weight is approximately reduced 5%(1.363→1.297 kg/㎥); Specific drilling rate is also reduced 8% compared to that of cylinder cut(2.393→2.130 kg/㎥); Vibrations, fly rock, and fragmentation produced by the new blast are to be proved superior to those of the traditional cylinder cuts.

Cyclic 활성슬러지 공정을 이용한 돈사폐수의 영양소 제거특성

조용진,임재명,이호식 江原大學校 附設 環境硏究所 1999 環境硏究 Vol.16 No.-

The cyclic activated sludge process is a modified activated sludge using the sequencing batch reactor(SBR) operation that can achieve the combination of carbon oxidation and nutrient removal. The operational characteristics of cyclic activated sludge process include a time-sequenced operation of anaerobic/aerobic/anoxic condition in a single reactor to achieve a maximum efficiency. The application of cyclic activated sludge process is, however, usually focused on the low strength wastewater including domestic sewage. As a result, limited attention has given to the high strength wastewater, especially for the piggery wastewater. The primary objective of this study is to evaluate an optimum operational cyclic to achieve combination of organic and nutrient removal using the piggery wastewater. The factors affecting inhibitory effects on nitrification during the cyclic operation is further determined. The result of this study, optimum operational cyclic of activated sludge process is 1hr : 2hr A/O(anoxic/oxic) ratio. Also, It was efficient that the SRT is operated more than 10 days and the specific nitrification rates were 0.04~0.24 ㎎N/gMv/hr at 20℃. Nitrification inhibition of piggery wastewater was found to occur at an influent volumetric loading over 0.3 NH₄-N ㎏/㎥/d. After a biological treatment, remaining phosphorus removal experiments were executed in oxidized ferrous column. As a result, the experiment showed the high density of variation in concentration by contact time on air. As for column aeration, completely phosphorus removal time was 25 minutes in contact time on air(20 hr) with aeration and 400 minutes(w/aeration) and 580 minutes(w/o aeration) in contact time on air(0 hr) respectively.

12주간의 등속성 및 스트레칭 운동이 노인 여성의 체력요인에 미치는 영향

임순길,조재혁 龍仁大學校 體育科學硏究所 2003 體育科學硏究論叢 Vol.13 No.2

The purpose of this study is to find whether isokinetic training and stretching program has a good effect on decrease of physical factors caused by aging and find the training program which has a good effect on physical factors. The subjects of this study are 15 elderly women aged from 61 to 65. The subjects were distributed into two groups, isokinetic training program group(n=8) and stretching group(n=7) respectively. The subjects of isokinetic training group participated in lower extremities isokinetic training program three times a week for 12 weeks, and the subjects of stretching group participated in stretching program three times a week for 12 weeks. Changes of physical factors(power, agility, gait speed, and balance) after training were analyzed through repeated measures anova. Results of this study are following: 1. There was a significant difference in balance test after 12 week training between stretching group and isokinetic group. 2. There was a significant difference in power test after 12 week training between isokinetic group and stretching group. 3. There was a significant difference in agility test after 12 week training between isokinetic group and stretching group. 4. There was a significant difference in gait speed test after 12 week training between stretching group and isokinetic group.

진행성 골화성 섬유 이형성증의 1예

임태영,조영신,정춘해,박유환,하상호,유재원 조선대학교 부설 의학연구소 2002 The Medical Journal of Chosun University Vol.27 No.1

진행성 골화성 섬유 이형성증은 2 백만명 중에 1명 발생하는 매우 드문 유전질환이다. 저자들은 2차례의 외상후 심해진 진행성 섬유 이형성증환자에서 최근 다시 발생된 외상후 생긴 병변부위에 biphosphonate와 steroid 투여로 최근수상부위의 근육 골화와 경화를 현저한 호전을 보였으나, 기존의 골화가 이미 진행된 병변에서는 잘 반응하지 않음을 경험하였기에 문헌고찰과 함께 보고하는 바이다. Fibrodysplasia ossificans progressiva(FOP) is an extremely rare hereditary disorder characterised by progressive heterotopic ossification of the soft tissue. The resulting progressive immobilization of the limbs, jaw and chest wall generally leads to severe disability. We present an 20-rear-old man with advanced FOP. He had two operative interventions by prior traffic accident and recent biopsy. It resulted abnormal ossification. Treatment for this disorder is avoidance of exacerbating factors and medical strategies is biphosphonate and steroid. We observed the course of ossification and muscle atrophy during biphosphonate and steroid therapy in advanced FOP.

TPM 우수기업을 위한 KS A ISO 2859-1과 KS A 3109와의 비교 분석

임재근,조병선,정수일 대한설비관리학회 2004 대한설비관리학회지 Vol.9 No.4

The growing importance of the product quality of the manufacturing industry is becoming more and more apparent as we enter the end of faster and deeper globalization trend. At the same time, among the various factors affecting the quality of the product, the importance of the production equipment is ever increasing. As a result, the TPM activity in Korean industries is getting increasing recognition and is being implemented with faster phase than ever. The companies with superior product quality are heavily involved with TPM activities and the product qualities of these companies are definitely better than the others. When we distinguish the product quality process into 3 steps, i.e. quality secure-quality confirm-quality guarantee, of course the 1st step of secure is the most important, but also the 2nd step of onfirm is one of the most important step. As well in mass production environment, sampling inspection is more desirable than the 100 % inspection procedure. As a part of globalization trend, KS system is also being revised and reestablished based on ISO, IEC, etc. *which are based on international standard. Conventional KS sampling inspection standards were in many areas quite different from ISO sampling inspection standards, only KS A 3102, 3104, 3151 are left and the rest be-come obsolete, and even the ones that are still around are planned to the gone step by step. It has been already 3 years since the new KS A ISO 2859-0--3 sampling inspection process has been established which the abolition of the popular KS A 3101, KS A 3105, KS A 3109, yet the implementation rate is very slow. This study will attempt to compare the old KS A 3109 with new KS A ISO 2859-0~3, and try to understand the difference as that the new standard can be easily understood and used widely among companies, by using examples. Our attempt is to help implement with the companies with active TPM involvement but the final result can be spread among other companies as well in the near future.