• Title/Summary/Keyword: order structure

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A Study On Order Structure of SERVPERVAL's 5 Dimensions

  • Cho, Yoon-Shik;Lee, Mi-Ock
    • Journal of the Korean Data and Information Science Society
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    • v.18 no.3
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    • pp.705-711
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    • 2007
  • This Paper has adapted SERVPERVAL scale so that hotel manager can use it to determine how customers perceive the service Quality in hotel. A considerable amount of research has focused on the dimensionality of service quality construct. As later found with the generic SERVQUAL, tangible was the most important out of the 5 dimensions. Listed in descending order of importance to hotel customers, the orders of the other 4 dimensions are assurance, reliability, responsiveness, and empathy. But there was order structure in SERVPERVAL's 5 dimensions. Order structure of 5 dimensions is divided by 3 order groups because there was same order among the 5 dimensions.

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Liquid Crystal Emulsions Containing High Content Ceramides for Improved Skin Barrier Functions

  • Lee, Jun Bae;Noh, Minjoo;Kim, Su Ji;Jang, Jihui
    • Korea Journal of Cosmetic Science
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    • v.1 no.1
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    • pp.19-29
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    • 2019
  • In this work, we fabricated liquid crystal (LC) emulsions with fatty alcohol in order to stabilize high content ceramide in cosmetic formulation. We investigated the role of fatty alcohol and surfactant in the formation of higher order structure. As a result, we found that they play a crucial role to form higher order structure. SAXS study shows that ceramide can be incorporated up to 3% in cosmetic formulation with higher order structure and its stability was maintained up to 12 weeks at room temperature. According to WAXS study, the higher order structure can suppress the re-crystallization of ceramide in cosmetic formulation. Finally, we performed in vivo skin barrier recovery test for the damaged skin. LC emulsions with ceramide and O/W emulsions show significant effect in skin barrier recovery at D 1, D 2 and D 6 compared to the untreated condition. While only LC emulsions show significant skin recovery effect at D 14. We expect that LC emulsions are the promising skin carrier to stabilize ceramide and LC emulsions with ceramide can improve the skin barrier function.

순서와 위상구조의 관계

  • 홍성사;홍영희
    • Journal for History of Mathematics
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    • v.10 no.1
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    • pp.19-32
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    • 1997
  • This paper deals with the relationship between the order structure and topological structure in the historical point of view. We first investigate how the order structure has developed along with the set theory and logic in the second half of the nineteenth century. After the general topology has emerged in the beginning of the twentieth century, two disciplines of the order theory and topology give each other a great deal of effect for their development via various dualities, compactifications by maximal filter spaces and Alexandroff's specialization order, which form eventually a fundamental setting for the development of the category theory or functor theory.

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Relationship between Replication and Structure of Micro/Nano Molded Parts

  • Ito, Hiroshi;Kazama, Kunihiko;Kikutani, Takeshi
    • Proceedings of the Polymer Society of Korea Conference
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    • pp.368-368
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    • 2006
  • Micro-molded parts can be defined as parts with microgram weight, parts with micro-structured surface, and parts with micro-precision. In this study, various micro-scale molded parts for various polymers were produced by using a precision micro-molding machine. Molded parts with nano-structure surface were also produced to analyze the effect of molding conditions on replication of surface pattern and higher-order structure development of molded parts. Replication of molded parts was influenced by material properties, molding conditions and size of surface pattern. Higher-order structure of molded parts was investigated by using polarized microscope. Skin-shear-core regions inside the molded parts were observed and shear region affected to surface replication.

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FIXED POINT PROPERTY AND COMPLETENESS OF ORDERED SETS

  • Kang, Byung-Gai
    • The Pure and Applied Mathematics
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    • v.4 no.1
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    • pp.19-26
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    • 1997
  • In this paper, we characterize the existence of fixed points of a multivalued function by the existence of complete preorder on the given domain. Also we investigate relations between the completeness of a given order and the fixed point property of some multivalued functions.

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Mathematical Structures of Jeong Yag-yong's Gugo Wonlyu (정약용(丁若鏞)의 산서(算書) 구고원류(勾股源流)의 수학적(數學的) 구조(構造))

  • HONG, Sung Sa;HONG, Young Hee;LEE, Seung On
    • Journal for History of Mathematics
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    • v.28 no.6
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    • pp.301-310
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    • 2015
  • Since Jiuzhang Suanshu, the main tools in the theory of right triangles, known as Gougushu in East Asia were algebraic identities about three sides of a right triangle derived from the Pythagorean theorem. Using tianyuanshu up to siyuanshu, Song-Yuan mathematicians could skip over those identities in the theory. Chinese Mathematics in the 17-18th centuries were mainly concerned with the identities along with the western geometrical proofs. Jeong Yag-yong (1762-1836), a well known Joseon scholar and writer of the school of Silhak, noticed that those identities can be derived through algebra and then wrote Gugo Wonlyu (勾股源流) in the early 19th century. We show that Jeong reveals the algebraic structure of polynomials with the three indeterminates in the book along with their order structure. Although the title refers to right triangles, it is the first pure algebra book in Joseon mathematics, if not in East Asia.

Continuous Flames and Countably Approximating Frames

  • 이승온
    • Journal for History of Mathematics
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    • v.13 no.2
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    • pp.95-104
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    • 2000
  • This paper is a sequel to [24]. It is well known that the order structure plays the important role in the study of various mathematical structures. In 1972, Scott has introduced a concept of continuous lattices and has shown the equivalence between continuous lattices and injective $T_0-spaces$. There have been many efforts made to generalize continuous lattices and extend corresponding properties to them. We introduce another class of frames, namely countably approximating frames, generalizing continuous frames and study its basic properties.

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Analysis of Higher Order Structure of 5S rRNA from Pseudomonas Alcaligenes by using($\eta^{6}$-mesitylene) manganese-(Ⅰ) Tricarbonyl hexafluorophosphate (($\eta^{6}$-Mesitylene) manganese-(Ⅰ) Tricarbonyl hexafluorophosphate를 사용한 Pseudomonas Alcaligenes 5S rRNA의 고차원 구조 분석)

  • Kim, Sang Bumn;Park, In Won
    • Journal of the Korean Chemical Society
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    • v.42 no.2
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    • pp.209-213
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    • 1998
  • The higher order structure of Pseudomonas alcaligenes 5S rRNA has been investigated by using ($\eta^{6}$-mesitylene) manganese (Ⅰ) tricarbonyl hexafluorophosphate[MTH-Mn (Ⅰ)], dimethylpyrocarbonate, potassium permanganate as chemical probes. The sequences cleaved strongly by MTH-Mn (Ⅰ) on the tertiary structure of the 5S rRNA are $G_{12}AUGG_{16}$ of loop a, $G_{51}AAGUGAAGC_{60}$ of the region b-C, $U_{65}-AGCG_{69}$. of the region B-a, and $G_{72}AUGG_{76}$ of loop d. Based on such cleavage patterns of 5S rRNA by MTH-Mn(Ⅰ) and other chemical probes, we presume that the sequences strongly cleaved form pocket-like structure as in the the corner of L structure of $tRNA^{Phe}$. We also presume that the region b-C and loop d together play a role of hinge in forming the pocket-like structure in the 5S rRNA.

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Higher Order Structure of 5S rRNA from Xanthomonas palargonii (Xanthomonas palargonii 5S rRNA의 고차원 구조)

  • Cho, Bongrae;Kim, Sang Bumn;Lee, Younghoon;Park, Inwon
    • Journal of the Korean Chemical Society
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    • v.39 no.9
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    • pp.734-740
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    • 1995
  • The primary and secondary structures of Xanthomonas palargonii 5S rRNA were determined. The higher order structure of the 5S rRNA was also analysed using several ribonucleases and chemical probes, such as ethylnitrourea, Pb2+, dimethylsulfate and diethyl pyrocarbonate. Ethylnitrourea was used for probing the phosphate groups involved in the tertiary interactions in the 5S rRNA. Nucleotides G72, A73, G75, A78, G98, G100 and A101 in unstable helical region d, nucleotides C36, C37, A39, and C41 in loop c, nucleotides A29 and G33 in stem C became resistant to ethylnitrourea modification in the presence of Mg2+. On the basis of findings from chemical and enzymatic studies, and also Pb2+-induced cleavages, it was concluded that region b-C and unstable helical region d may act as hinges in the folding of 5S rRNA.

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Firing Order Optimization of Medium Speed Diesel Engine Considering Structure and Shaft Vibration (구조 및 축 진동을 고려한 중속 디젤엔진의 착화순서 최적화)

  • Lee, Soo-Mok;Kim, Won-Hyun;Jung, Kun-Hwa
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • pp.840-843
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    • 2006
  • The determination of firing order is very significant procedure in initial stage of design for medium speed diesel engine. Generally, the selection of firing order has been accomplished in view of minimum excitation forces condition. In this paper all possible firing orders under the given number of cylinder were considered to decide the optimum. Meanwhile torsional vibration characteristics using the phase vector sum method and minimum excitation force concept were applied. From these results, some superior cases were selected. And then, the torsional vibration response analysis and the resonance characteristics of engine structure were investigated for the final decision.

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