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초등학교 학생들의 귀납연역적 추론 능력과 정신 용량 및 보석 오류와의 관계
김설한,정진우,김효남 한국교원대학교 과학교육연구소 1998 청람과학교육연구논총 Vol.8 No.1
The purpose of this study was to analyze the problem solving strategies of elementary school students and to find out correlations between the functional mental capacity, the perseveration error and the Creature Card Task solving ability. To study this purpose, four categories were selected through pilot test. The sample consisted of 231, the 4th grade students and the 5th grade students in Inchon, Korea and selected 32 students among them. Three instruments were used in this study, Creature Card Task, FIT(Figural Intersection Test) and WCST(Wisconsin Card Sorting Test). Researcher interviewed 32 students about Creature Card Task solving strategies and tests with FIT, WCST. Major findings of the study are as follows: 1. Creature Card Task solving strategies of the selected 4th & 5th grade students were different. Some students solved problems during individual interviews. 2. Creature Card Task solving abilities were significantly correlated with the functional mental capacity and the perseveration error.
김상연,최항문,한진우,이설미 대한구강악안면방사선학회 2004 Imaging Science in Dentistry Vol.34 No.2
Purpose : To make a focal trough (image layer) for an average maxillary dental arch of 6-year-old korean in panoramic radiography. Materials and Methods : Phantom for the maxillary dental arch was designed using intercanine width, intermolar width, tooth size, and interdental spacing to record the data of 6-year-old child. The characteristics of pre-corrected panoramic machine (for adult) was evaluated using the phantom, resolution test pattern for margin of the image layer, and metal ball for the center of the image layer. Panoramic image layer of the child was developed by means of decreasing the speed of film-cassette and positioning the phantom backwards, and then the characteristics of post-corrected panoramic machine (for child) were reevaluated. Results : At post-corrected panoramic image layer, beam projection angles at all interdental areas increased for about 2.6-3.8.., the position of the image layer was shifted toward the rotation center for about 2.5 mm at the deciduous central incisior area. The width of image layer decreased at all areas. Conclusion : Increased beam projection angle will reduce the disadvantage of tooth overlap, and the same form between the center of the image layer and dental arch will improve image resolution.
이행남,박길문,이덕구,정한별,김건일,설재림 朝鮮大學校 機械技術硏究所 2005 機械技術硏究 Vol.8 No.1
The sirocco fan is used to get low noise, and it has been applied to a lot of industry field like the heat engine, the fluid instrument power plant, the food industry, environment industry etc... because there are not problems even it is mixed with a any kind of liquid, gas, and solid. The flow characteristics in sirocco fan are investigated by PIV. The experiment using PIV measurement for Test section's flow characteristics acquired velocity distribution, Condition : when sirocco fan in automobile air controller maximum 1450RPM, and a revolution is a variation (l)950RPM, (2)l100RPM, (3) 1250RPM. The agreement a experiment shows the validity of this study and the results of this study would be useful to the engineers who design for the flow systems
Han, Kyu-Sul,Seol, In-Chan,Ryu, Ho-Ryong,Jo, Hyun-Kyung,An, Jung-Jo,NamGung, Uk,Kim, Yoon-Sik The Physiological Society of Korean Medicine and T 2007 동의생리병리학회지 Vol.21 No.6
In oriental medicine, Sukjihwang (SJH, Rehmanniae radix preparat) has been used as one of the key ingredients for the prescription of several herbal decoctions and applied clinically for the treatment of several diseases including nervous system and cardiovascular disease. Here, possible growth-promoting effects of SJH on injured spinal cord axons were investigated in the rats. SJH administration increased levels of active form of ERK1/2 protein and Cdc2 proteins in the injured spinal cord tissue. Anterograde DiI-tracing of corticospinal tract axons showed that SJH-treatment enhanced axonal arborization in the injury area and extensive axonal extension into the caudal area. In SJH-treated group, glial scar formed after spinal cord injury was confined in a smaller area compared to the control group, and the trabecula structure was well observed within the injury cavity. Furthermore, increased proliferation and migration of astrocytes in the injury cavity were observed by SJH treatment. Thus, these present data provide a biological evidence on potential importance of SJH therapy for the treatment of injured spinal cord.
Optimization of Drying Temperature and Time for Pork Jerky Using Response Surface Methodology
Han-Sul Yang,Sung-Won Kang,Jin-Yeon Jeong,Ji-Yeon Chun,Seon-Tea Joo,Gu-Boo Park,Sung-Gil Choi 한국식품과학회 2009 Food Science and Biotechnology Vol.18 No.4
Response surface methodology (RSM) was applied to determine the optimum drying conditions for pork jerky. The physicochemical properties of pork jerky, such as final moisture content, water activity (Aw), pH, and shear force were investigated. In addition, sensory characteristics of pork jerky were evaluated and were used as a parameter for determining the optimum condition. Pork jerky samples were dried at different temperatures between 40 to 80℃ for the time ranged from 0 to 10 hr. The predicted values for moisture content, Aw, and shear force of dried pork samples were in good agreement with the experimental values with correlation coefficients (R²) of 0.95, 0.96, and 0.97, respectively. Both drying temperature and time significantly (p<0.01) affected moisture content, Aw, pH, and shear force and their interactions were also significant at p<0.01 except for Aw. RSM showed the optimum drying conditions for pork jerky, based on moisture content, shear force, and sensory evaluation to be 65-70℃ for 7-8 hr.
Physical and Sensory Properties of Low Fat Sausage Amended with Hydrated Oatmeal and Various Meats
Han Sul Yang,Gap Don Kim,Sung Gil Choi,Seon Tea Joo 한국축산식품학회 2010 한국축산식품학회지 Vol.30 No.3
Low-fat sausages were prepared with various meats to investigate the effect of the addition of oatmeal at 10% as a fat substitute. The sausages were made with beef, pork and chicken after trimming the visible fat, and the physical and sensory properties of the sausages were evaluated. Beef sausage had the lowest cooking yield and the highest hardness, while chicken sausage showed the opposite properties. The addition of oatmeal resulted in sausage products with less cooking loss and softer texture for all types of meat sausages. Such changes were more pronounced for beef low-fat sausage than for the other types of sausages. The results of moisture absorption suggested that the difference in cooking yield and hardness among sausage products was due to the water-retention properties of different meats and the substitute in response to heat treatment. Sensory evaluation indicated that the greatest overall acceptability of the sausage products were obtained from 10% oatmeal-added pork sausage and that the addition of oatmeal led to better acceptability for all types meat sausages.
Han, Seungnam,Nam, Jungyong,Li, Yan,Kim, Seho,Cho, Suk-Hee,Cho, Yi Sul,Choi, So-Yeon,Choi, Jeonghoon,Han, Kihoon,Kim, Youngrim,Na, Moonseok,Kim, Hyun,Bae, Yong Chul,Choi, Se-Young,Kim, Eunjoon The Society 2010 The Journal of neuroscience Vol.30 No.45
<P>PSD-95 (postsynaptic density-95) is thought to play important roles in the regulation of dendritic spines and excitatory synapses, but the underlying mechanisms have not been fully elucidated. TANC1 is a PSD-95-interacting synaptic protein that contains multiple domains for protein-protein interactions but whose function is not well understood. In the present study, we provide evidence that TANC1 and its close relative TANC2 regulate dendritic spines and excitatory synapses. Overexpression of TANC1 and TANC2 in cultured neurons increases the density of dendritic spines and excitatory synapses in a manner that requires the PDZ (PSD-95/Dlg/ZO-1)-binding C termini of TANC proteins. TANC1-deficient mice exhibit reduced spine density in the CA3 region of the hippocampus, but not in the CA1 or dentate gyrus regions, and show impaired spatial memory. TANC2 deficiency, however, causes embryonic lethality. These results suggest that TANC1 is important for dendritic spine maintenance and spatial memory, and implicate TANC2 in embryonic development.</P>
Photosensitizing Property of Some Anthraquinone Derivatives
Han, Dong-Sul,Park, Byung-Kwan 木浦大學校基礎科學硏究所 1988 基礎科學硏究誌 Vol.6 No.-
The photosensitizing property of some anthraquinone derivatives was examined. The chemical evidence for involvement of singlet oxygen during photoirradiation for chrysophanol glucoside, physcion glucoside and quinalizarin was based on the rapid disappearance of DPBF in appropriate experiments. And the βvalue for DPBF in methanol solution was determined by using chryso-phanol glucoside as the singlet oxygen sensitizer. Resulting βvalue was ??.