• Title/Summary/Keyword: Protecting

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Molecular Dynamics and Quantum Chemical Molecular Dynamics Simulations for the Design of MgO Protecting Layer in Plasma Display Panel

  • Kubo, Momoji;Serizawa, Kazumi;Kikuchi, Hiromi;Suzuki, Ai;Koyama, Michihisa;Tsuboi, Hideyuki;Hatakeyama, Nozomu;Endou, Akira;Takaba, Hiromitsu;Kajiyama, Hiroshi;Shinoda, Tsutae;Miyamoto, Akira
    • 한국정보디스플레이학회:학술대회논문집
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    • 2008.10a
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    • pp.1049-1052
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    • 2008
  • We developed novel molecular dynamics and quantum chemical molecular dynamics simulators for the design of MgO protecting layer in plasma display panel. These simulators were applied to the investigations on the destruction processes of the MgO protecting layer as well as the evaluation of its second electron emission ability. From the simulation results, we successfully proposed new guidelines for MgO protecting layer with high durability and high second electron emission ability.

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Rule Protecting Scheme for Snort

  • Son, Hyeong-Seo;Lee, Sung-Woon;Kim, Hyun-Sung
    • Proceedings of the Korea Society of Information Technology Applications Conference
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    • 2005.11a
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    • pp.259-262
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    • 2005
  • This paper addresses the problem of protecting security policies in security mechanisms, such as the detection policy of an Intrusion Detection System. Unauthorized disclosure of such information might reveal the fundamental principles and methods for the protection of the whole network. In order to avoid this risk, we suggest two schemes for protecting security policies in Snort using the symmetric cryptosystem, Triple-DES.

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One-pot Synthesis of Cinnamylamines with Various Protecting Groups from Cinnamyl Ethers

  • Jung, Young-Hoon;Kim, Ji-Duck
    • Archives of Pharmacal Research
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    • v.24 no.5
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    • pp.371-376
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    • 2001
  • The reaction of various alkyl cinnamyl ethers with CSI afforded the corresponding cinnamylamines with various protecting groups, such as -NHMoc, -NHiPoc, -NHCbz, -NHPnz, -NHTroc and -NHAloc. In the case of cinnamyl t-butyl ether and cinnamyl p-methoxybenzyl ether, the corresponding cinnamyl carbamates were formed via a different reaction pathway from the above.

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The Influence of Protecting Groups on the β-Sheet Structure Stability of Protected Peptides

  • 이진식;이동진
    • Bulletin of the Korean Chemical Society
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    • v.16 no.7
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    • pp.591-594
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    • 1995
  • The influence of protecting groups on the β-sheet-structure-stability of protected peptides was studied in organic solvents. α-amino groups, carboxyl groups and side chain functional groups of model peptides were protected by suitable groups commonly used in peptide synthesis. The difference of the solubilities of model peptides was investigated by the solvent-titration method by using IR absorption spectra. The β-sheet structure of model peptide in CH2Cl2 was easily disrupted by increasing the amounts of DMSO. The β-sheet-structure-stabilizing potentials of each protecting group showed similar behaviors except Npys, Mts and Z2. The result exhibits that the < SPβ > values of protected peptides are almost independent of the kinds of their protecting groups.

Weathering and Crack Development in the Rocks of Protecting-Chamber for Standing-Buddha of Mireuk-ri Temple site at Jungwon (중원 미륵리사지 입상석불 보호석실의 암석의 풍화와 균열의 발달양상)

  • Lee, Sang Hun
    • Journal of Conservation Science
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    • v.7 no.2
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    • pp.68-79
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    • 1998
  • The protecting-chamber for a standing Buddha of Mireuk-ri temple site at Jungwon is composed of granite of Cretaceous age which mainly consists of quartz, perthite, plagioclase, and biotite with minor amounts of muscovite, apatite, chlorite, sericite and opaque mineral. There are abundant cracks which may be developed by strong weathering and differential loading by structural unbalances of the whole protecting-chamber. Cracks can be divided into three types based on genesis as those formed by exfoliation, intrinsic, and pressure. The exfoliation occurred along the onion structure of the granite. The pressure cracks are generally superimposed on the exfoliation ones, which might be developed by structural unbalance of the protecting-chamber resulted from differential loading in places. The structural unbalance may be due to change in physical properties of the rocks according to strong weathering, differential settling of basement soil by difference in loading in places of protecting-chamber, westward creep of the basement soil below the West wall and related different resistance of the basement soil against the loading, and partial depression of the West wall. For the conservation of the protecting-chamber, it must be considered the method of stabilizing the basement and treatment of the cracks.

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Hermetically Sealed Refrigeration Compressor Motors and it's Protecting Device (밀폐형압축기용 전동기및 그 보호장치에 관하여)

  • 경원기계공업㈜ 압축기연구실
    • The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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    • v.7 no.4
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    • pp.257-267
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    • 1978
  • Hermetically sealed refrigeration comperessor use for household refrigerotor, room air conditioner, require effective performance, stable condifion. From now, I'm going to tell you about characteristics of motors, starters and protecting device for compressors.

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Physiological Study on the Effect of Preventing the Browning Reaction by Corn Starch and Sucrose on Maillard Browning of Casein -Excretion phenomenon and contents of free amino acids and fructosyl-lysine of serum, liver and small intestinal diesta by rats- (옥수수 전분과 서탕에 의한 Casein갈변저지 효과에 관한 생리적 연구 -흰쥐에 의한 fructosyl-lysine 및 유리아미노산의 배설양상과 혈청, 간 및 소장내용물중의 함량-)

  • 우강융
    • Journal of Nutrition and Health
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    • v.21 no.4
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    • pp.197-212
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    • 1988
  • To study the effect of preventing the browning reaction between casein and glucose by protecting the reactants using corn starch with coating material, rats were fed for 30 days nonbrowning diet, nonprotected browning diet, browning diet protected only casein, browning diet protected both casein and glucose and browning diet supplement sucrose simultaneously with protecting both casein and glucose. The amounts of fructosyl-lysine excreted through urine were greater than those through feces regardless of diets and the both side of the excreted amounts of fructosly-lysine through urine or feces were greater for rats fed browning diets regardless protecting compared to rats fed the nonbrowning diet. Through urine, the excreted amounts of fructosyl-lysine were decreased for rats fed the browning diet supplemented sucrose simultaneously with protecting both casein and glucose than those for rats fed the nonprotected browning diet and through feces, were decreased for rats fed protected browning diets regardless of protecting method than the nonprotected browning diet. The excreted amounts of all individual essential free amino acids through feces were increased for rats fed browning diets irrespective of protecting compared to the nonbrowning diet, but through urine, were increased or similar level for rate fed the nonbrowning diet compared to browning diets except histidine. The excreted amount of free lysine through feces were decreased for rats fed protected browning diets than nonprotected browning diet. Fructosyl-lysine contents of serum, liver and small intestinal digesta were increased for rats fed browning diets regardless of protecting by starch compared to nonbrowning diet but, of serum and small intestinal digesta were decreased for rats fed protected browning diets than the nonprotected browning diet.

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A Study on Patients' Perception of Nurse's Behavior in Protecting Patient Privacy (간호사의 환자 프라이버시 보호행동에 대한 환자의 인식도)

  • Lee, Mi-Young;Song, Young-Shin
    • Journal of Korean Academy of Fundamentals of Nursing
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    • v.14 no.2
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    • pp.204-212
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    • 2007
  • Purpose: The purpose of this study was to investigate the patient's perception of the nurse's behavior in protecting patient privacy and to make suggestions for medical facilities to increase protection of patient privacy. Method: The research was a survey study The data on protection of privacy in primary nursing, for physical privacy, of patient information and in private conversations were collected in October 2005 from 187 patients in a university hospital. Frequencies, means, t-test, ANOVA, and $x^2$-test were used to analyze the data. The SPSS 13.0 for Windows program was used. Results: The mean score for patients' perception of nurse protection of their privacy was 3.33. There were significant differences in perception of protecting patients' privacy according to gender for private conversation, according to level of education for all but physical nursing and for number of admissions for total score and for primary nursing. Conclusion: The results of this study suggest the following: a) Institutional polices and nursing guideline should be clearly stated as to the nurses' duty to protect patient privacy. b) Medical facilities should be arranged in a way that allows for the protection of patients' medical information, and should focus on patient privacy. c) It is necessary of nurses to receive periodic in-service education on protecting patient privacy.

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Frirtion and wear properties of plasma-sprayed $Cr_2$$O_3$ composite coatings at high temperature ($MoO_3$가 첨가된 $Cr_2$$O_3$, 플라스마 용사코팅의 고온 마찰 마멸 특성)

  • Lyo, I. W.;Ahn, H.-S.;Lim, D. S.
    • Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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    • 2001.11a
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    • pp.96-102
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    • 2001
  • plasma-sprayed Cr$_2$O$_3$-based coatings containing MoO$_3$ were studied to gain a better understanding of the influence of MoO$_3$ composition in the coatings on their tribological behaviour. A reciprocal type tribo-tester was employed to examine friction and wear behavior of the specimens at high temperature(450。C). The physical characteristics of worn surfaces were investigated by scanning electron microscopy and chemical composition of the coating surfaces was analyzed using a X-ray photoelectron spectrometer. The results showed that friction coefficient of the MoO$_3$-added coatings were lower than those without MoO$_3$ addition. The larger protecting layers were observed at the worn surface of plasma spray coated specimens with MoO$_3$ addition. XPS analysis of the protecting layer indicated that MoO$_3$ composition was dominantly formed at the surface. MoO$_3$ composition in the protecting layer appears to be more favorable in reducing the friction.

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Stability and in Vivo UV-Protecting Efficacy of Emulsions Stabilized with Cinnamoyl Surfactants

  • Park, Seok Ho;Kwon, Kyeongnan;Kim, Jin-Chul
    • Korean Chemical Engineering Research
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    • v.56 no.2
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    • pp.143-150
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    • 2018
  • Oil-in-water emulsion was prepared using cinnamoyl surfactants as emulsifiers. Cinnamoyl surfactants used in the present study were polyoxyethylene (20) sorbitan monolaurate-cinnamic acid conjugate (TW20CA), polyoxyethylene (20) cetyl ether-cinnamic acid conjugate (CE20CA), and polyoxyethylene(20) oleyl ether-cinnamic acid conjugate (OE20CA). The emulsion stabilized with TW20CA was the most stable, possibly because the polyoxyethylene segment of TW20CA would sterically stabilize the oil droplets effectively. In vivo UV protecting efficacy of surfactant and emulsion was investigated by determining the minimum amount of UV light (MAUL) to induce a black point on the back of hairless mice (HRM2). The mean MAUL of PARSOL, OE20CA, and emulsion stabilized with TW20CA was $1046.5mJ/cm^2$, $1163mJ/cm^2$, and $1308.5mJ/cm^2$, respectively. The high UV-protecting efficacy of the emulsion could be ascribed to not only the UV-absorbing property of cinnamoyl group but also the UV-scattering property of the oil droplets.