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김대진,심규민,김성수,이원복,김경용,Kim, Dae-Jin,Sim, Kyu-Min,Kim, Sung-Su,Lee, Won-Bok,Kim, Kyung-Yong 한국현미경학회 2003 Applied microscopy Vol.33 No.1
사람 태아의 지라를 대상으로 투과전자현미경을 이용해 지라에서 혈구형성이 일어나는 가에 대해 연구를 진행하였다. 태아 지라에서는 적혈구형성에서 볼 수 있는 미분화세포인 전적혈구모세포를 포함해 염기호성적혈구 모세포, 뭇염색성적혈구모세포, 호산성적혈구모세포를 모두 관찰할 수 있었다. 이외에도 호산성적혈구모세포에서 핵의 탈출, 유사분열중인 적혈구모세포가 있었다. 하나의 세포가 적혈구모세포 집단을 에워싸고 있는 적혈구모세포섬과 유사한 형태의 구조가 있었으며, 이러한 구조는 태아 간 적혈구형성에서 보이는 적혈구모세포섬과 매우 유사한 구조로서 지라에서도 적혈구모세포섬이 형성되어 적혈구형성을 이루고 있었다. 거대핵세포 계통의 세포들도 지라에서 관찰할 수 있었으나 더욱 발달된 거대핵세포나 유사분열중인 거대핵모세포를 관찰할 수 없었으며, 혈소판을 만들어내는 세포질의 분리현상을 볼 수 없었다. 지라의 기능으로 볼 때 본 실험에서 관찰한 거대핵모세포는 순환중인 거대핵모세포가 단순히 지라에서 걸려있는 여과기능에 의한 것인지, 아니면 이곳에서 증식하여 혈구형성에 관여하는지는 분명하지 않았다. 이상의 결과를 종합하여 볼 때, 사람의 태아 지라에서도 적혈구형성이 일어나고 있으며, 그 방식은 골수나 간에서 일어나는 것과 유사한 방식으로 진행된다고 생각된다. 그러나 혈소판형성에 관여하는 거대핵세포의 형성의 유무는 확실하지 않았다. The hemopoiesis in human fetal spleen was studied with transmission electron microscope. There were undifferentiated proerythroblast, basophilic erythroblast, polychromatophilic erythroblast, and acidophilic erythroblast. Besides, enucleated nuclei and mitoses were present. Groups of erythroblastic cells were surrounded by certain cell. The structure was identical to erythropoietic island found in fetal liver. So, erythropoisis in spleen was developing in a pattern similar to fetal liver. Megakaryobalst were found in spleen, but there was no mature cells, cells in mitosis nor platelet formation. It was not clear whether megakaryoblast in circulation was trapped in spleen or participated in megakaryopoiesis. In summary, erythropoiesis took place in fetal spleen in a pattern similar to fetal liver and bone marrow. But it was not certain whether megakaryopoiesis took place in fetal spleen.
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Broiler 사료에 합성아미노산의 첨가효과에 관한 연구 1 . Broiler 초기 사료에 DL - methionine 과 L - lysine 의 첨가효과
김대진,김영길,방극승,최경문,김진성 ( D . J . Kim,Y . K . Kim,K . S . Bang,K . M . Choi,J . S . Kim ) 한국축산학회 1981 한국축산학회지 Vol.23 No.2
The experiment was carried out to investigate the effect of synthetic amino acid to broiler starter with Anak broiler strain. The five treatments in this experiment was that of Control (basal diet:no addition of amino acid), T₁(basal diet+methionine 0.15% and lysine 0.2%), T₂(basal diets methionine 0.3% and lysine 0.4%), T₃(basal diet-methionine 0.15%)and T₄(basal diet-lysine 0.2%) with four replicates. The trial was carried out from 0 week to 4 weeks of age. The results obtained are as follows; 1. The live weight gain of T₁, T₂, T₃, T₄and Control group were 806±2 g, 803±25g, 783±14g, 780±22g, 751±10g respectively and showing no significant difference among treatments. 2. Feed conversion of T₂(1.48) and T₄(1.48) were improved significantly (p$lt;0.05) compared with that of other groups. 3. Energy efficiency ratio of T₄(4.74) and T₂(4.75) were superior by 8-11% to that of control and T₃. 4. Protein efficiency ratio of T₂(2.9) and T₄(3.0) were the highest efficient by approximately 6 -10% compared with that of other groups. 5. In conclusion, the group fed higher methionine and lysine content than the recommendation of NRC feeding standard feed tend to improve for broiler feed conversion, E. E. R. and P. E. R.
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KAPE, 축산 명인을 만나다 - 경북 영주시 안정면 <소백양계> 손병원 대표 건강이 담긴 계란 하나가 바로 내 운명!
김대진,Kim, Dae-Jin 축산물품질평가원 2016 KAPE누리 Vol.240 No.-
전국 최대 단일규모의 직영농장인 <소백양계>. 매일 50만 개 이상의 건강한 계란만을 담아내는 이곳에 60여 년간 한 길을 걸어온 사람이 있다. 바로 대한민국 양계의 산증인이라 말할 수 있는 손병원 대표(83), "계란이 내 인생의 전부"라고 단언할 수 있는 명인을 만나 양계에 대한 조언을 들어본다.
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기계학습 기반의 실내 측위 성능 향상을 위한 학습 데이터 전처리 기법
김대진,황치곤,윤창표,Kim, Dae-Jin,Hwang, Chi-Gon,Yoon, Chang-Pyo 한국정보통신학회 2020 한국정보통신학회논문지 Vol.24 No.11
최근 Wi-Fi 전파 지문을 이용한 실내 위치 인식 기술이 다양한 산업 분야 및 공공 서비스에서 적용되어 운영되고 있다. 기계학습 기술의 관심과 함께 단말 주변의 무선 신호 데이터를 사용한 기계학습 기반의 위치 인식 기술이 빠르게 발전하고 있다. 이때 기계학습에 필요한 무선 신호 데이터의 수집 과정에서 왜곡되거나 학습에 적합하지 않은 데이터가 포함되어 위치 인식의 정확도가 낮아지는 결과가 발생한다. 또한 특정 위치에서 수집된 데이터를 기반의 위치 인식을 수행하는 경우 학습에 포함되지 않은 주변 위치에서의 위치 인식에 문제가 발생한다. 본 논문에서는 수집된 학습 데이터의 전처리 과정을 통해 향상된 위치 인식 결과를 얻기 위한 학습 데이터 전처리 기법을 제안한다. Recently, indoor location recognition technology using Wi-Fi fingerprints has been applied and operated in various industrial fields and public services. Along with the interest in machine learning technology, location recognition technology based on machine learning using wireless signal data around a terminal is rapidly developing. At this time, in the process of collecting radio signal data required for machine learning, the accuracy of location recognition is lowered due to distorted or unsuitable data for learning. In addition, when location recognition is performed based on data collected at a specific location, a problem occurs in location recognition at surrounding locations that are not included in the learning. In this paper, we propose a learning data preprocessing technique to obtain an improved position recognition result through the preprocessing of the collected learning data.
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목뼈와 등뼈 폄 복합운동이 척주세움근 근활성도에 미치는 영향
김대진,강민혁,Dae-Jin Kim,Min-Hyeok Kang 대한고유수용성신경근촉진법학회 2023 PNF and Movement Vol.21 No.3
Purpose: The purpose of this study was to compare the effects of new exercises (combined cervical and thoracic extension exercises) with those of conventional cervical extensor strengthening exercises (sitting cervical extension exercises) and thoracic extensor strengthening exercises (prone thoracic extension exercises). Method: Fifteen healthy subjects performed sitting cervical extension exercises, prone thoracic extension exercises, and combined cervical and thoracic extension exercises. During each exercise, electromyography was used to measure muscle activity in the erector spinae with C4 and T4 levels. The measured data were analyzed using one-way repeated analysis of variance. Results: With different exercises, there were significant differences in activity in the erector spinae muscle (p < 0.05). The activity in the erector spinae muscle increased significantly during the combined cervical and thoracic extension exercises compared to the sitting cervical extension (p < 0.05) and prone thoracic extension exercises (p < 0.05). The sitting cervical extension exercises significantly increased activity in the cervical erector spinae muscle compared to the prone thoracic extension exercises (p < 0.05). Activity in the thoracic erector spinae muscles was significantly increased during the prone thoracic extension exercises compared to during the sitting cervical extension exercises (p < 0.05). Conclusion: These findings suggest that the newer exercises effectively increase activity in the cervical and thoracic extensor muscles.
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다낭성난소증후군 환자들에서 Clomiphene Citrate에 대한 난소 반응의 예측 인자들에 관한 연구
김대진,채희동,손철,김정훈,강병문,장윤석,목정은,Kim, Dae-Jin,Chae, Hee-Dong,Sohn, Cherl,Kim, Chung-Hoon,Kang, Byung-Moon,Chang, Yoon-Seok,Mok, Jung-Eun 대한생식의학회 1998 Clinical and Experimental Reproductive Medicine Vol.25 No.2
Objectives: To determine whether the body weight, body mass index (BMI), and basal serum level of LH, FSH, testosterone (T), dehydroepiandrosterone sulfate (DHEA-S) are related to the ovarian response to clomiphene citrate (CC) in patients with polycystic ovarian syndrome (PCOS). Materials and Method: From January 1996 to June 1997, total 57 patients with PCOS were enrolled in the present study. Women who had other infertility factors were excluded from our study. The ovulation induction using CC was used in all patients. The patients were grouped into 50 mg group, 100 mg group, and 150 mg group according to their daily CC dose. The patients were also grouped to ovulatory and non-ovulatory group. The body weight, BMI, and basal serum level of LH, FSH, T, DHEA-S were measured in all patients on the 2nd or 3rd day of the menstrual cycle. Results were analysed with Student's t-test and Fisher's exact test. Results: The body weight and BMI of the nonovulating group were significantly higher than those of the ovulating group in all groups (50, 100, 150 mg of CC). However, there were no significant differences of the level of LH and FSH between ovulating and nonovulating groups in all CC groups (50, 100, 150 mg). The level of T of nonovulating group was significantly higher in 50 and 100 mg of CC groups, but not in 150 mg group. The level of DHEA-S of the non-ovulating group is significantly higher in 50 mg group, but not in 100 and 150 mg groups. Conclusion: The body weight and BMI could be useful predictors of ovarian response to CC in patients with PCOS, and basal T and DHEA-S also might be useful in cases of low-dose CC treatment.
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