• Title/Summary/Keyword: research from the inside

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The Physicochemical Properties of Starch from Inside White Fresh Ginseng (내백 수삼 전분의 특성)

  • Park, Hoon;Lee, Mi-Ja;Cho, Byung-goo;Lee, Joung-ryoul
    • Journal of Ginseng Research
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    • v.18 no.3
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    • pp.191-195
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    • 1994
  • Among many kinds of constituents of ginseng root, starch was the most noticeable component related to inside white in fresh ginseng. The ash of inside white section was higher in content and greenish gray in color. The water binding capacity and ash content of the starch from inside white fresh ginseng were higher than those of starch from normal fresh ginseng, but amylase content was not significantly different. Ash of inside white fresh ginseng starch contained higher in Ca, Mn and Fe content. Complexes of small granular starch and amino acids were rich in swelling power, and solubility by temperature change were similar between inside white fresh ginseng starch and normal one, but the former was more easily swelled than the latter.

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Structuralist view of Knowledge and the Structure of Knowledge in Mathematics (지식에 대한 구조주의적 관점과 수학에서의 '지식의 구조')

  • 임재훈
    • Journal of Educational Research in Mathematics
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    • v.8 no.1
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    • pp.365-380
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    • 1998
  • Structualist view distinguishes structure(reality) from phenomenon(appearance). Phenomenon is the outside aspect of structure and structure is the inside aspect of phenomenon. From the structualist view, the knowledge could e divided into two parts, the appearance of knowledge(the outside aspect of knowledge)and the structure of knowledge(the inside aspect of knowledge). Structualist view advices teachers to understand knowledge more totally from the inside-outside viewpoint, and not to teach mere the one aspect of knowledge, especially the outside aspect of knowledge, that is, the written expressions in textbook, but to teach the inside and outside aspects fo knowledge totally. In the history of mathematics education, the attempts to teach the structure of knowledge were flourishing in the period of discipline-centered curriculum. 'New Math movement' represents the attempts. The advocators of New Math, however, did not succeed sufficiently to understand the inside-outside view which the term the structure of knowledge represents, and failed to make mathematics teachers to understand the view well. Their attention was put on to introduce the modern mathematics to school math rather than to understand the educational and epistemological perspective which the term the structure of knowledge represents. To teach the structure of knowledge, mathematics teacher should be able to understand mathematical knowledge more totally from the inside-outside viewpoint. Especially, s/he should not regard the outside aspect of mathematical knowledge written in textbook as the totality of knowledge, but inquire into the inside aspect of mathematical knowledge from the outside aspect of mathematical knowledge.

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Biochemical and Histological Charaeteristics of Inferior Red Ginseng (불량홍삼(내백삼)의 생화학적 및 조직학적 특성)

  • Do, Jae-Ho;Kim, Sang-Dal;Seong, Hyeon-Sun
    • Journal of Ginseng Research
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    • v.9 no.2
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    • pp.256-263
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    • 1985
  • In order to investigate the inferior factor of red ginseng quality, the contents of various chemical components, physico-chemical properties and arrangement state of ginseng cells were observed. Contents of total reducing sugar, reducing sugar, crude protein, crude fibre and specific gravity of inside white part of red ginseng were less than those of normal part. But differences in content of crude saponin, HPLC pattern of ginsenosides and reducing ability for DP P H(1,1-dipheny 1-2-picrylhydrazyl) between normal and inside white part of red ginseng were not found. The optical density of 1 water extract of normal part of red ginseng did not differ from that of inside white 1 part of red ginseng, but the visible and UV absorbance of acid hydrolyzate of normal red ginseng showed higher than those of inside white part of red ginseng. The differences in the internal color and tissue of normal and inside white part of red ginseng were easily found with naked eye, and by the microscopic fractography, the orangement state of ginseng cell in the inside white part of red ginseng was less dense than that in normal red ginseng.

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Studies on the Aging Characteristics in Different Parts of Beeswax-treated Duplicates during Humidified Artificial Aging (습식 인공열화 시 밀랍본 복제품의 제책 부위별 열화특성)

  • Choi, Kyoung-Hwa;Cho, Jung Hye;Kang, Yeong Seok;Yang, Eun Jung;Jeong, Hye Young
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.44 no.5
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    • pp.72-79
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    • 2012
  • In this study, to understand the aging factor and mechanism in different partitions of the beeswax-treated volumes, the duplicated beeswax-treated volume was artificially aged at $80^{\circ}C$ of temperature and 65% of relative humidity and then a physical and optical properties of an aged volumes was analyzed. Also, the degraded components of the beeswax samples isolated from different partitions of aged volumes was measured using a gas chromatography/mass spectroscopy (GC/MS). In results, the surface of beeswax-treated volume which is primarily affected by a main aging factors such as light, oxygen, moisture was more deteriorated than the inside of that volume. However, unlike inside of the book volume which was made from paper, the inside of beeswax-treated volume wax was also considerably deteriorated. The inside of the beeswax-treated volume is largely unaffected by the oxygen and humidity during aging due to the water repellency and the air permeation resistance of beeswax. Therefore, it is confirmed that aging factors and mechanisms in the inside of the volume are different from thats of the outside of the volume. This fact was also verified by the results of GC/MS analysis of an beeswax samples which was sampled from different partitions of aged volumes. As result as GC/MS analysis of the beeswax extracted from the outside of the aged volume, the low molecular compounds with a carbon length of $C_9-C_{20}$ (fatty acid, etc) were increased and the compounds with a carbon length of above $C_{34}$ (ester, etc) were also increased. But the compounds with a chain length of $C_{21}-C_{36}$ (hydrocarbon, alcohol, etc) were decreased. In case of the aged beeswax of inside, the low molecular compounds with a carbon length of $C_9-C_{20}$ (fatty acid, etc) and the compounds with a chain length of $C_{21}-C_{36}$ (hydrocarbon, alcohol, etc) were increased. While, the compounds with a carbon length of above $C_{34}$ (ester, etc) were decreased.

General Education for Science and Engineering Students

  • Lee, Duck-Joo
    • Journal of Engineering Education Research
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    • v.17 no.4
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    • pp.38-42
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    • 2014
  • The principle of materialized world is the same as of human life. The human life is governed by the human mind composed of the copies of the materialized world. The stress is due to the human mind inside. The creativity is prevented by the copies in the human mind. The convergence is not easy due to the individual copy world which is different from each other. By subtraction of the copies inside the human, the creativity and convergence can be fulfilled. Syllabus of the lecture at KAIST is introduced. Students taking the lecture express the non-materialized world of human mind clearly after the subtraction the copies inside. The students who recognize the stress inside specifically can be free from the stress by discarding the copies inside.

Eulerian Two-Phase Flow Analysis for Solid-Liquid Mixing in a Industrial Mixer (산업용 교반기의 고체-액체 혼합에 대한 Eulerian Two-Phase 유동해석)

  • Song, Ae-Kyung;Hur, Nahm-Keon;Won, Chan-Shik;Ahn, Ick-Jin
    • 유체기계공업학회:학술대회논문집
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    • 2006.08a
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    • pp.471-474
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    • 2006
  • The Mixer is apparatus that help precipitation or an inhomogeneous distribution of various phases to be mixed and that user makes necessary material mixing one or the other. Mainly the mixer which is used from chemical and food industry is very important system in engineering that mixes the material. The inside flow of the mixer under the actual states which put a basis in flow of the fluid is formed rotation of the impeller. The inside flow of impeller will be caused by various reasons change with shape of impeller, number of rotation, mixing material and flow pattern of free surface etc. Also mixer study depended in single-phase flow and experimental research. So the numerical analysis of flow mixing solid-fluid particle is simulated. It is become known, that the case where agitator inside working fluid includes the solid particle the sinkage reverse which the solid particle has decreases an agitation efficiency. From the research which it sees the hazard solid which examines the effect where the change of the sinkage territory which it follows agitation number of revolution and diameter of the particle goes mad to an agitator inside flow distribution - numerical analysis the inside flow distribution of liquid state with Eulerian Two-Phase Method.

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A simple formula for insertion loss prediction of large acoustical enclosures using statistical energy analysis method

  • Kim, Hyun-Sil;Kim, Jae-Seung;Lee, Seong-Hyun;Seo, Yun-Ho
    • International Journal of Naval Architecture and Ocean Engineering
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    • v.6 no.4
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    • pp.894-903
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    • 2014
  • Insertion loss prediction of large acoustical enclosures using Statistical Energy Analysis (SEA) method is presented. The SEA model consists of three elements: sound field inside the enclosure, vibration energy of the enclosure panel, and sound field outside the enclosure. It is assumed that the space surrounding the enclosure is sufficiently large so that there is no energy flow from the outside to the wall panel or to air cavity inside the enclosure. The comparison of the predicted insertion loss to the measured data for typical large acoustical enclosures shows good agreements. It is found that if the critical frequency of the wall panel falls above the frequency region of interest, insertion loss is dominated by the sound transmission loss of the wall panel and averaged sound absorption coefficient inside the enclosure. However, if the critical frequency of the wall panel falls into the frequency region of interest, acoustic power from the sound radiation by the wall panel must be added to the acoustic power from transmission through the panel.

Design, construction, and characterization of a Prompt Gamma Neutron Activation Analysis (PGNAA) system at Isfahan MNSR

  • M.H. Choopan Dastjerdi;J. Mokhtari;M. Toghyani
    • Nuclear Engineering and Technology
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    • v.55 no.12
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    • pp.4329-4334
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    • 2023
  • In this research, a prompt gamma neutron activation analysis (PGNAA) system is designed and constructed based on the use of a low power research reactor. For this purpose, despite the fact that this reactor did not include beam tubes, a thermal neutron beam line is installed inside the reactor tank. The extraction of the beam line from inside the tank made it possible to provide the neutron flux from the order of 106 n.cm-2.s-1. Also, because the beam line is installed in a tangential position to the reactor core, its gamma level has been minimized. Also, a suitable radiation shield is considered for the detector to minimize the background radiation and prevent radiation damage to the detector. Calculations and measurements are done in order to characterize this system, as well as spectrometry of several samples. The results of evaluations and experiments show that this system is suitable for performing PGNAA.

The Relationship between Clothing Microclimate and Physiological Responses at $15^{\circ}C$ Environment ($15^{\circ}C$ 환경에서 의복기후와 인체생리반응과의 관련성)

  • Park, Joon-Hee;Choi, Jeong-Wha
    • Journal of the Korean Home Economics Association
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    • v.46 no.4
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    • pp.97-105
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    • 2008
  • The objective of this study is to investigate the relationship between clothing microclimate and physiological responses, including subjective sensations, when, in a $15^{\circ}C$ environment, a range of temperatures inside clothing is broadly produced from using various combinations of upper and lower garments. Six male subjects participated in the investigation and the results were as follows. For all types of inside garments, the temperature of the clothing was lower than the skin temperature for the whole body in each case. The mean temperature for inside clothing ($\bar{T}_{cl}$) significantly showed the highest correlation with mean weighted skin temperature (r = 0.816) and was less positively correlated with the temperature of the inside clothing at the chest (r = 0.326) (p < .01). Values for both the energy expenditure and the heart rate were less positively correlated with the clothing microclimate (p < .01). The change of body heat content showed a negative correlation with the surface temperature of the innermost clothing (r = -0.519) and there was a difference between the innermost surface temperature and the outermost surface temperature of the clothing at the chest (r = -0.577). As td increased, the increase of body heat content declined (p < .01). There was a negative correlation between body fat and some of the temperatures inside the clothing (p < .01) and body fat had no significant correlation with the humidity inside the clothing. Subjective sensations were more highly correlated with $\bar{T}_{cl}$ than with the temperature of the inside clothing at the chest and had not significantly correlation with the humidity of the inside clothing. In conclusion, through these results, it can be seen that the temperature inside the clothing was related to various physiological responses and subjective sensations, and that the mean temperature of the inside clothing ($\bar{T}_{cl}$) showed a higher relationship with the temperature of the inside clothing at the abdomen than that at the chest.

Measurement of the Shape in the Radioactive Area by Ultrasonic Wave Sensor

  • Park, Koon-Nam;Sim, Chuel-Muu;Park, Chang-Oong;Lee, Chang-Hee;Park, Jong-Hark
    • Journal of Mechanical Science and Technology
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    • v.16 no.7
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    • pp.927-934
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    • 2002
  • The HANARO ( High-flux Advanced Neutron Application Reactor) has been operated since 1995. The Cold Neutron (CN) hole was implanted in the reflector tank from the design stage. Before a vacuum chamber and a moderator cell for the cold neutron source are installed into the CN hole, it is necessary to measure exactly the size of the inside diameter and thickness of the CN hole to prevent the interference problem. Due to inaccessibility and high radiation field in the CN hole, a mechanical measurement method is not permitted. The immersed ultrasonic technique is considered as the best way to measure the thickness and the diameter of the CN hole. The 4-Axis manipulator was designed and fabricated for locating the ultrasonic sensors. The transducer of an ultrasonic sensor having 10 MHz frequency leads to high resolution as much as 0.03mm. The inside diameter and thickness of 550 points of the CN hole were measured using 2 channel ultrasonic sensors. The results show that the thickness and inside diameter of the CN hole is in the range of 3.3∼6.7mm and 156∼ 165mm, respectively. This data will be a good reference for the design of the cold neutron source facility.