태연혈(太淵穴)의 유침 시간에 따른 체온 변화 -적외선체열촬영(赤外線體熱撮影)을 중심으로-

이봉효 ( Bong Hyo Lee ),이경민 ( Kyung Min Lee ),박지하 ( Ji Ha Park ),김민서 ( Min Seo Kim ),김산들 ( San Deul Kim ),박병규 ( Byeong Gyu Park ),양현동 ( Hyun Dong Yang ),예성호 ( Sung Ho Yea ),이호정 ( Ho Jung Lee ),최재원 ( Jae 경락경혈학회 2012 Korean Journal of Acupuncture Vol.29 No.2

Objectives: This study was performed to find the desirable remaining time of needle in the acupuncture treatment. Methods: The 21 volunteers were given acupuncture at LU9 vertically and needles were remained for 2 min, 10 min, 15 min, 30 min, respectively. The thermographic change induced by acupuncture was measured with Digital Infrared Thermographic Image at the following acupoints: LU11, LU10, LU9, LU8, LU5, LU1, and PC7. The statistical significance of thermographi change was evaluated using paired t-test and post hoc Wilcoxon test. Results: The most significant changes after acupuncture were produced when needles were remained for 10 min or 15 min. LU11, LU5, LU1, and PC7 were the point at which all of the remaining time produced significant change commonly. At LU11, the biggest change was produced when needle was remained for 15 min, while at LU5, LU1, and PC7, the biggest change was produced when needle was remained for 30 min, and the smallest change was produced when needle was remained for 10 min at all of acupoints of LU11, LU5, LU1, and PC7. The unbalance between left side and right was decreased the most largely in 15 min group. Conclusions: The results of this study suggest that the desirable remaining time of acupuncture needle might be 15 min.

Efficient Recycling of WC-Co Hardmetal Sludge by Oxidation Followed by Alkali and Sulfuric Acid Treatments

Dong-hyo Yang,Rajiv Ranjan Srivastava,Min-seuk Kim,Dao Duy Nam,Jae-chun Lee,Hai Trung Huynh 대한금속·재료학회 2016 METALS AND MATERIALS International Vol.22 No.5

We present a process to recycle strategic metals, viz. tungsten and cobalt, from a WC-Co hardmetal sludge (WCHS) via oxidation followed by a two-step hydrometallurgical treatment with alkali and acid solutions. The oxidation of WCHS was investigated in the temperature range of 500 to 1000 °C and optimized at 600 °C to transform the maximum WC into an alkali-soluble WO3. The conditions for the selective dissolution of WO3 in stage-I were optimized as follows: 4.0 M NaOH, pulp density of 175 g/L, and temperature of 100 °C for 1 h, yielding maximum efficacy. Subsequently, in the second step, the optimal conditions for cobalt leaching from the alkali-treated residue were established as follows: 2.0 M H2SO4, 25 g/L pulp density, and 75 °C temperature for 30 min. Downstream processing of the obtained metal ions in solutions was also easier, as the only impurity of dicobaltite ions with the Na2WO4 solution was precipitated as Co(OH)3 under atmospheric O2; meanwhile, the CoSO4 solution obtained through the second step of processing can be treated via electrolysis to recover the metallic cobalt. The present process is simpler in operation, and the efficient use of eco-friendly lixiviants eliminates the previously reported disadvantage.

자바리, Epinephelus bruneus의 난 발생과 부화에 미치는 수온의 영향

양문호,최영웅,정민민,구학동,오봉세,문태석,이창훈,김경민,한석중,Yang, Moon-Ho,Choi, Young-Ung,Jung, Min-Min,Ku, Hag-Dong,Oh, Bong-Sae,Moon, Tae-Seok,Lee, Chang-Hoon,Kim, Kyong-Min,Han, Seock-Jung 한국발생생물학회 2007 발생과 생식 Vol.11 No.2

This study examined temperature effect in egg development and hatching of longtooth grouper, Epinephelus bruneus. Fertilized embryos was not growth after morula stage at $15^{\circ}C$, at 18, 21, 24 and $27^{\circ}C$, the required time from fertilized embryos to hatching were 70 h. 30 min., 44 h. 10 min., 29 h. 10 min. and 24 h. 30 min., respectively. The hatching rates at $24^{\circ}C$ were higher than the other conditions and the hatching was not occurred at $15^{\circ}C$. These results suggest that the water temperature range of egg development and hatching was $18{\sim}27^{\circ}C$. 이 연구는 실내 사육수조에서 자연산란 후 수정된 난을 대상으로 수온에 따른 난 발생속도와 부화율을 조사하였다. 부화에 이르기까지 각 수온조건에서 소요된 시간은 $15^{\circ}C$에서 상실기 이후 발생이 진행되지 않았고, 18, 21, 24, $27^{\circ}C$에서 각각 70시간 30분, 44시간 10분, 29시간 10분 그리고 24시간 30분이 소요되었다. 부화율은 $15^{\circ}C$에서 0%였고, 18, 21, 24 그리고 $27^{\circ}C$에서 각각 $8.3{\pm}1.2%$, $18.0{\pm}6.2%$, $24.0{\pm}4.0%$ 그리고 $17.0{\pm}7.2%$로 뚜렷한 차이 없이 $24^{\circ}C$에서 다소 높았고 21와 $27^{\circ}C$에서 비슷한 경향이었으며 $18^{\circ}C$에서 가장 낮게 나타났다. 이러한 결과에서 자바리의 난발생 수온범위는 $18{\sim}27^{\circ}C$로 제안된다.

개의 췌도분리에서 췌장의 팽창과 콜라겐 분해요소

이상훈,김성주,박정환,김종성,오승훈,한진수,정인경,양태영,김동준,김광원,이문규,민용기,이명식,정재훈,함종렬 대한당뇨병학회 2000 Diabetes and Metabolism Journal Vol.24 No.2

Backgrounds: One of the main problems conditioning the outcome of islet transplantation is the ability to separate a sufficient number of viable islets with preserved function. Islet purification is critically affected by all of the isolation stages. Thus, it is necessary to set up the standard isolation method that islets are separate well from acinar without compromising islet yield and viability. Methods: Twenty three adult mongrel dogs were used for the experiment of total pancreatectomy with islet isolation. The islets were properly isolated by a modified Recordi method. The obtained islets were further purified by centrifugation on discontinuous gradients using cell separation system (Model 2991, Cobe, Lakewood Colo). We evaluated islet number (islet equivalent number, 150 um equivalents/kg of recipient body weight, IEq/kg), purity, cell volume, viabilty, recovery rate, and comparison of outcome according to the isolation conditions. Results: 1) The mean of islet numbers before purification were 13543±9431Eq/kg, digestion times were 13.8±2.6 min., digestion temperature was 37.4±0.2℃, purity was 59.7?.0%, viability was 90.0±2.1%, cell volume was 4.7±1.1 mL, islet number after purification were 4064±361 IEq/kg, and recovery rate was 29±2.9%. 2) Isolated islet numbers were different according to the degree of pancreas distension with collagenase, digestion temperature, and digestion time. 3) The best conditions for islet isolation were above 37.5℃ in temperature at recirculation of collagenase, within 12 min in digestion time and well distended pancreas with collagenase. 4) According to multiple regression adjusted by variable factors, the degree of pancreas distension with collagenase and digestion time were independently associated factors for successful islet isolation. Conclusions: In this study, we concluded that the degree of pancreas distension with collagenase and digestion time were independent factors for successful islet isolation and the best conditions for islet isolation were above 37.5℃ in temperature at recirculation of collagenase, within 12 min in digestion time and well distended pancreas with collagenase.

左則 上두骨 및 頰骨에 發生한 殲維性 骨異形成症의 治驗例

梁棟奎,朴相俊,金秉民,金基元,金鍾烈 大韓顎顔面成形再建外科學會 1990 Maxillofacial Plastic Reconstructive Surgery Vol.12 No.3

Fibrous dysplasia is an idiopathic skeletal disorder in which medullary bone is replaced and disturbed by poorly organized, structually unsound fibroosseous tissue, which may produce cortical expansion. When facial bones are involed, considerable esthetic deformity may result. The term monostotic fibrous dysplasia has been applied when one bone is involved : when more than one bone is affected, the term polyostotic used. The polyostotic form may be accomplished by pigmented skin lesion (Jaffe type), or by pigmented skin lesions with endocrine disturbance (Albright syndrome). No general agreement exists on the cause of fibrous dysplasia. A few authors have suggested that fibrous dysplasia arises as a resujlt of trauma. It occurs predominantly in infant, adolescent females and runs a variable clinical course. When several bones are involed, it tends to be unilateral. Involements of alveolar bone may produce displacement of teeth with malocclusion, or loss of teeth, or both. Radiographycally, ti shows an indistinctly delimited osteolytic defect with a bubble - like pattern, but without a sclerotic rim. The preferred treatment is almost always surgery. If the lesion is extensive, surgical intervention with use of recontouring procedures aimed at the correction of esthetic or funtional disturbances is preferred treatment. Now, we present a case of fibrous dysplasia on the left maxilla and the zygoma treated by bony contourign via hemicoronal flap and intraoral approach with good results.

알쯔하이머병 환자의 뇌혈류 장애 : Statistical Parametric Mapping을 이용한 Tc-99m ECD SPECT 분석 Statistical Parametric Mapping analysis of Tc-99m ECD SPECT

양동원,김범생,손영민,박정욱,정용안,손형선,김상윤 대한치매학회 2002 Dementia and Neurocognitive Disorders Vol.1 No.2

Background and Objectives . Alzheimer's disease (AD) is the most common cause of the dementia Pathologic and functional changes of AD are known to be unevenly distributed in the brain. This study investigates changes of cerebral blood flow (CBF) in patients with AD to determine brain regions with hypoperfusion that reflects progression of disease. Methods. Tc-99m-ECD single photon emission computed tomography (SPECT) was performed to measure regional CBF and statistical parametric mapping (SPM) 99 soft ware was used for the automated and objective approach to analyze SPECT image data. Twenty-five patients with mild to moderate dementia who met NINCDS-ADRDA critena for AD (male 11 female 14) and 17 age-matched normal control subjects were studied. The severity of AD was measured by clinical dementia rating (CDR) scale Results. SPM analysis of SPECT images revealed that CBF in the anterior cingulate gyrus left superior panetal cortex left medial frontal cortex left infenor temporal cortex. right thalamus and left hippocampus was significantly decreased in AD patients compared with normal controls (corrected p<0.05). The reduction of CBF according to CDR was localized in the left hippocampus and infenor temporal cortex right antenor and postenor ciagulate cortex and right superior panetal cortex (uncorrected p<0.01). Conclusions : Our data suggest that the cognitive dysfunction of AD is strongly related with functional abnormality in discrete brain areas 99m-Tc ECD SPECT with SPM analysis could be used as a useful functional imaging tool in AD study.

Cementation 법에 의한 흑연 분말상의 구리 코팅

양승봉,민봉기,정동호,최순돈 영남대학교 공업기술연구소 2000 工業技術硏究所論文集 Vol.28 No.2

We studied the copper cementation and homogeneous coating on the graphite powder by changing the activation temperature and the amount of wetting agent. When we peformed the activation process above 380℃, we were able to achieve the homogeneous copper coating layer on the graphite powder. However, it was impossible to get the homogeneous coating layer on the graphite powder without the activation process. In addition, wetting process on the graphite powder is essential for improving the efficiency of copper cementation. As a result, the optimum condition for copper coating on the graphite by cementation is to add 1㎖ glacial acetic acid and mix with 7g copper sulphate(CuSO4 · 5H2O) and 2g zinc.

Self etching primer를 사용하여 부착된 교정용 브라켓의 전단결합강도의 비교

양진영,김민지,임용규,이동렬 대한치과교정학회 2007 대한치과교정학회지 Vol.37 No.4

병원간접원가의 예측수단으로서의 회귀식 모형과 인공신경망 모형에 대한 비교연구

양동현,박광훈,김선민 한국병원경영학회 1999 병원경영학회지 Vol.4 No.2

This research aims to compare between regression and neural network in terms of the predictive ability of the overhead costs in hospitals. For this purpose, this research uses the number of out-patients and complex medical treatments as explaining variables. Thirty-one hospitals were used for the empirical test. The test result shows that the regression model has a more predictive ability than the neural network.

볼트 접합된 반강접 보-기둥 죠인트에 대한 Component Method의 적용

양철민,김동환,김영문 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2(구조계)

Beam-to-column joint transfer reactions from the beam to the column. When subjected to shear forces and in-plane bending moment, they deform, particularly in rotation. In other words, the primary distortion of a steel beam-to-column joint is its rotational deformation (θ), caused by the in-plane bending moment (M). Therefore, the joint behavior is substantially represented through M-θ, which is the most important input data for the analysis and design of semi-rigid frames. The study of the M-θ behavior of steel beam-to-column joints has increased dramatically. Several approaches to create nonlinear M-θ curves for various connection types have been used. In fact, even though simplified methods have been already developed for evaluating the rotational behavior of connections with angles, these models refer only to the behavior of the connection rather than to the joint as a whole, excluding the significant influence of the column components. The case of bolted connections with angles becomes even more complex than others. In this paper, a mechanical model to predict their M-θ curve is presented. To achieve this goal, the component method described in Annex J of Eurocode 3 (CEN, 1997) is used. Also, in order to verify the reliability of the component method, experimental test on bolted semi-rigid beam-to-column connection was conducted.