• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2021년도 춘계학술대회
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• pp.204-206
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• 2021

실시간 시추매개변수 예측은 시추효율의 극대화 관점에서 상당히 중요한 연구이다. 시추 극대화 방법 중 시추속도를 향상시키는 방법이 일반적인데 이는 굴진율, 시추스트링 회전속도, 비트 하중, 시추이수 유량과 연관관계를 지니고 있다. 본 연구는 실시간 시추매개변수 중 하나인 굴진율을 순환신경망기반 딥러닝 모델을 이용하여 예측하는 방법을 제안하였으며 기존의 물리적 기반의 굴진율 모델과 딥러닝 모델을 이용한 예측 모델을 비교해 보고자 한다.

• 물과 미래
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• 제10권2호
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• pp.91-100
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• 1977

This is an experimental study to raise higher efficiency of filteration than conve ntional filteration by increasing of filteration capacity for per unit area and by extending of filteration lasting time with biflow filter system which was improved from the conventional rapid sand filteration method in the process of water purification treatment. In order to raise more efficient function of filteration and giving consideration to the filter layer at upper and lower parts of the filter, the fine sand & an thracite were used as a filter medium. Although there is some difficulty than previous fine sand in procurement, it could confirm that such filter medium (fine sand & anthracite) was more effective in the field of load, lasting time and back wash, etc. In consideration of practical effect of filteration. The raw water which was used for this experimental study was not coagulated. As a result of this experiment, the filteration volume could increase more than 2 times than that of conventional method. Besides, much more advantages could be obtained for instance, the requirement of installation area was not much and installation cost could economize. On the other hand, the following results were found. The quality of filtered water became worse as time goes by and the turbidity of filtered water was more influenced by raw water turbidity than by rate of filteration. Lasting time of filteration on change of filteration rate in the filter layer reached 2 times in comparison with previous filter basin, and until loss gead reached to 1.0 meter and 1.5 meter, the following relate formulas between lasting time and rate of filteration were formed. ($T_{1.5}=181.96V^{-0.46},\;T_{1.0}=121.31V^{-0.46}$) Even though the lasting time can be shorten in case of the increase of the filteration rate, but the lasting time was prolonged more than 2 times than of previous method. With taking aim at contribution to the development of water treatment technique, we are planning to study continuously for the future study basing on the results in this papers.

• 한국수정란이식학회지
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• 제22권4호
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• pp.219-222
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• 2007

These study was carried out to investigate the effects of the collection time, culture time and activation of canine oocytes on in vitro maturation rates. The activated oocytes were cultured in 10% FCS+TCM-199 media containing hormonal supplements (10 IU/ml HCG, 10 IU/ml PMSG, 10 ug/ml gonadotropin) at 5% $CO_2$, 95% air, $38^{\circ}C$. 1. IVM rate of in vitro cultured cumulus-attached oocytes recovered from ovaries that collected at follicular and luteal stages of the reproductive cycles were 11.4% and 5.7%, respectively. IVM rate of oocytes recovered from ovaries that collected at follicular stages of the reproductive cycles was significantly higher than that of luteal stage (p<0.05). 2. When IVM was carried out at different periods of 40, 48, and 70 hrs, the IVM rates of oocytes matured in vitro were 2.9%, 8.6%, 5.7%, respectively. These results indicate that the IVM time between $48{\sim}70$ hrs gives the highest maturation rate for the oocytes matured at the different stages. 3. IVM rate of oocytes matured in vitro for 10 hrs after single and combined activation treatment by ET, IP and CH and Ca+DMAP, CH+DMAP, ET+CH were $11.5{\pm}1.2%,\;10.8{\pm}1.0%,\;9.6{\pm}1.2%\;and\;12.4{\pm}1.5%,\;11.8{\pm}1.5%,\;11.2{\pm}1.4%$ respectively. This was higher than that in both single and combined stimulated groups compared to control group ($6.2{\sim}7.2%$).

• 한국임상수의학회지
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• 제15권2호
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• pp.399-403
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• 1998

To clarify the anesthetic effect of acupoint injection(aquapupuncture) using general anasthetics in dogs, 18 mongrel dogs were divided into control and two experimental groups(Tian-ping+Bai-hui : Tian-ping group and San-yang-luo+Gong-sun group : San -yang- lux group). Control group was intramuscularly injected with ketamine hydrochloride, 22 mg/ kg of body weight into the thigh and experimental groups were injected into each acupoint with half volume of dosage, respectively. Clinical findings(recumbency time, induction time of anesthesia, time of head lift and standing time) and changes of vital sign(temperature, heart rate and respiration rate) were investigates at pre-anesthesia, during anesthesia and poststanding, respectively. In recumbency time San-yang-luo groupui<0.05) and Tian-ping group (p<0.05) were faster than that of control, respectively and Tian-ping group was the fastest. In induction time of anesthesia San-yang-luo group was similar to that of control, however, Tian-ping group was faster than that of control(p

• Structural Engineering and Mechanics
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• 제89권6호
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• pp.589-599
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• 2024

This study presents the usability of the high-rate single-frequency Precise Point Positioning (SF-PPP) technique based on 20 Hz Global Positioning Systems (GPS)-only observations in detecting dynamic motions. SF-PPP solutions were obtained from post-mission and real-time GNSS corrections. These include the International GNSS Service (IGS)-Final, IGS real-time (RT), real-time MADOCA (Multi-GNSS Advanced Demonstration tool for Orbit and Clock Analysis), and real-time products from the Australian/New Zealand satellite-based augmentation systems (SBAS, known as SouthPAN). SF-PPP results were compared with LVDT (Linear Variable Differential Transformer) sensor and single-frequency relative positioning (SF-RP) solutions. The findings show that the SF-PPP technique successfully detects the harmonic motions, and the real-time products-based PPP solutions were as accurate as the final post-mission products. In the frequency domain, all GNSS-based methods evaluated in this contribution correctly detect the dominant frequency of short-term harmonic oscillations, while the differences in the amplitude values corresponding to the peak frequency do not exceed 1.1 mm. However, evaluations in the time domain show that SF-PPP needs high-pass filtering to detect accurate displacement since SF-PPP solutions include trends and low-frequency fluctuations, mainly due to atmospheric effects. Findings obtained in the time domain indicate that final, real-time, and MADOCA-based PPP results capture short-term dynamic behaviors with an accuracy ranging from 3.4 mm to 8.5 mm, and SBAS-based PPP solutions have several times higher RMSE values compared to other methods. However, after high-pass filtering, the accuracies obtained from PPP methods decreased to a few mm. The outcomes demonstrate the potential of the high-rate SF-PPP method to reliably monitor structural and earthquake-induced ground motions and vibration frequencies of structures.

• 한국가스학회지
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• 제19권3호
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• pp.54-59
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• 2015

가스하이드레이트(GH: Gas Hydrate)는 전 세계적으로 약 10조 톤에 이르는 엄청난 양이 대부분 해양의 대륙사면에 부존되어 있으나(동토 지역 : 2 %, 해양 대륙사면 98 %), 현재까지 가스하이드레이트 저류층으로부터 상업화할 수 있을 만큼 가스를 회수하는 기술이 개발되어 있지 않은 실정이다. 일반적으로 회수하는 방법은 감압법, 열자극법, 억제재 주입법 및 치환법 등으로 크게 나누어 볼 수 있으며, 본 연구에서는 가스하이드레이트 포화율과 감압률에 따라서 가스하이드레이트 해리시간 및 가스생산이 어떻게 달라지는 지, 그에 대한 특성을 분석하고자 하였다. 연구분석 결과 감압률과 해리시간의 상관 관계식을 도출($Y=0.0004X^2-0.499X+176.86$)할 수 있었고, 또한 감압률이 클수록 메탄생산량이 좋다는 것을 알 수 있었지만(감압률 40% 대비 50%에서 메탄가스생산량이 46.2% 향상), 감압률이 60%에서는 오히려 생산량이 줄어드는데, 이는 가스하이드레이트 재형성에 기인한 것으로 판단된다.

• 대한한의학회지
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• 제16권1호통권29호
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• pp.184-197
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• 1995

After 45 patients examined as to the result of medical treatment among the ones who came to Dept. of Pain Clinic, Oriental Medical Hospital, Chunju Woosuk University complaining low back pain chiefly from Dec/19/1994 to Feb/7/1995 for 50 days or so were observed clinically, the results were obtained as follows: 1. In duration of the case history, acute stage(37.8%) was the most predominant, and subacute stage(35.6%) and chronic stage(26.7%) were revealed in turn. 2. In opinions of radiation, Spondylosis(26.7%) was the most predominant, Scoliosis(15.6%) and HIVD(11.1%) were revealed in order, and 3 cases were revealed to be negative. 3. In the radiating pain of the lower limb, the radiating pains of the left lower limb were the most predominant and those of the right lower limb and those of both lower limbs were revealed in turn. By the way, 31.1% of patients didn't suffer from the radiating pain of the lower limb. 4. In the grade of the seriousness of subsective symptom, Grade 2(66.7%) was the most predominant, and Grade 3, Grade 4, and Grade 1 followed it in order. 5. In the period of the treatments of medi-acupuncture, 2-5 day treatments(31.1%) were major and 6-10 day treatments(26.7%), 16-20 day treatments(11.1%), 26-30 day treatments(11.1%), over 31 day treatments(11.1%), 11-15 day treatments(4.4%), and 21-25 day treatments(4.4%) followed it by turns. Thus 2-10 day treatments are 57.8% and under 30 day treatments are 57.8% of all. 6. In the frequency of use of each medi-acupuncture, V was most frequency used in 41 cases(91.1%), and 11 cases of HN(24.4%), 8 cases of MOK(17.8%), 4 cases of OK(8.9%), 2 cases of B(4.4%), and a case of I(2.2%) were revealed in turn. 7. In the effect of treatments, 10 cases(22.2%) were excellent, 25 cases(55.6%) were good, 5 cases(11.1%) were fair, and 5 cases(11.1%) were poor. As the result, 88.9% of all changed for the better and all of these were improved within the third trial. 8. The effect of the treatments per durations was 100% in acute stage, 93.8% in subacute stage, and 66.7% in chronic stage. According to that, it was reavealed that the rate of treatments decreased as it came near to the chronic stage. 9. The effect of treatments per radiating pains was 87.5% in the radiating pains of the left lower limb, 81.8% in those of the right lower limb, 100% in those of both lower limbs, and 92.9% in case that patients have no radiating pains. So in the rate of treatments on radiating pains of the lower limbs, the case of both sides or no radiating pains was higher than that of one side. 10. In the effect of treatments per the condition of patients, Grade 4 showed 100% of improvement, Grade 3 showed 90.9% of improvement, Grade 2 showed 86.7% of improvement, and Grade 1 showed 100% of improvement. 11. In the effect of treatments per contents of treatments, the group treated with medi-acupuncture therapy, herb medication therapy, acupuncture therapy, and physiothrapy at the same time(Group 1) showed 100% of improvement, the group treated with medi-acupuncture therapy, acupuncture therapy, and physiotherapy simultaneously(Group 2) showed 73.7% of improvement, and the group treated with medi-acupuncture therapy and acupuncture therapy at the same time(Group 3) showed 100% of improvement. 12. 2-5 day treatments showed 78.6% of improvement, 6-10 day treatments showed 91.7% of improvement, and over 31 day treatments showed 100% of improvement. As the result, genarally the longer the period of treatment was, the better the effect of treatment was. 13. When only V was used, the rate of treatment was 96.2%. When only HN was used, the rate of treatment was 100%. When only MOK was used, the rate of treatment was 100%. When V and HN were used at the same time, the rate of treatment was 33.3%. When V and MOK were used at the same time, the rate of treatment was 100%. When V and OK were used at the same time, the rate of treatment was 100%. When V, HN, and MOK were used at the same time, the rate of treatment was 100%. When V, OK, and MOK were used at the same time, the rate of treatment was 100%. When V, MOK, and B were used at the same time, the rate of treatment was 100%. When V, HN, OK, and I were used at the same time, the rate of treatment was 100%. When V, HN, and B were used at the same time, the rate of treatment was 100%.

• 한국환경보건학회지
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• 제17권2호
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• pp.41-47
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• 1991

A study on the effects of volumetric loading rate, surface loading rate and hydraulic. retention time (HRT) for the anaerobic treatment was conducted with the anaerobic fixed-film process using synthetic wastewater at lower temperature than that of conventional anaerobic treatment. The results are as follows 1. Alkalinity and pH value decreased as the hydraulic retention time increased 2. Increase of the volumetric lodaing rate led to increasl of effluent COD concentration and decrease of COD removal efficiency. 3. The removed volumetric loading rate increased linearly according to the increase of the volumrtric loading rate. 4. Similarly, the linear increase of the removed surface loading rate was noticed with an increase of the surface loading rate.

• 한국임상수의학회지
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• 제21권2호
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• pp.115-121
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• 2004

The purpose of this study was to ascertain the breeding efficiency in Thoroughbred mare. A total of 106 mares were investigated for the status of follicle (462 cases), ovulation (179 cases) and pregnancy (346 cases). Of total examination, 46.8% was follicle measure to determine breeding time, and mating rate per cases examined was 39.9%. There was no correlation between reproductive results and size of follicles or endometrial edema or degrees of teasing alone. 143 cases were ovulated among 179 cases which were performed ovulation examination, and ovulation rate and fertilization rate per mating times were 79.9% and 39.0%, respectively. The use of hCG(human chorionic gonadotropin), to facilitate ovulation, presented to increase occurrence of double ovulations and twin fertilizations In conclusion, though more examination to estimate the optimal breeding time and higher mating rate was performed, fertilization rate per mating times was lower and then reproductive efficiency also became decreased. Therefore, it seemed that accurate examination of reproductive tracks, appropriate teasing programme and hCG administration before ovulation were of help to improve ovulation rate and fertilization rate.

• 한국임상수의학회지
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• 제8권2호
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• pp.171-175
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• 1991

This study was carried out to evaluate the effects of doxapram after ketamine treatment. Twelve healthy dogs were anesthetized with ketamine(15mg/kg IM) and then twenty minutes after the injection of ketamine six dogs received doxapram(2mg/kg IV)and six dogs received saline(5$m\ell$ IV)as a control group. Recovery time, respiratory rate, heart rate and electrocardiogram findings(ECG)were recorded. Recovery time was significantly decreased(p<0.05)by doxapram. Respiratory rate showed a maximal increase immediately after the administration of doxapram. Thereafter respiratory rate gradually decreased and revealed normal levels 10 minutes after the injection of doxapram. Ketamine increased significantly (p<0.05) heart rate. Heart rate showed slight increase immediately after the administration of doxapram. Thereafter heart rate gradually decreased, and revealed normal levels 20 minutes after the injection of doxapram.