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Active Control of Vibrational Intensity in a Compound Vibratory System (복합진동계의 진동 인텐시티 능동 제어)

  • Kim, Gi-Man
    • Journal of the Korean Society for Precision Engineering
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    • v.19 no.6
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    • pp.109-118
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    • 2002
  • The vibrational intensity and the dynamic response of a compound vibratory system had been controlled actively by means of a feedforward control method. A compound vibratory system consists of a flexible beam and two discrete systems - a vibrating source and a dynamic absorber. By considering the interactive motions between discrete systems and a flexible beam, the equations of motion for a compound vibratory system were derived using a method of variation of parameters. To define the optimal conditions of a controller the cost function, which denotes a time averaged power flow, was evaluated numerically. The possibility of reductions of both of vibrational intensity and dynamic response at a control point located at a distance from a source were fecund to depend on the positions of a source, a control point and a controller. Especially the presence of a dynamic absorber gives the more reduction on the dynamic response but the less on the vibrational intensity than those without a dynamic absorber.

A Study on the Commercial Customs and Practices in Indonesia (인도네시아의 통상환경과 상관습에 대한 소고)

  • Kim, Hee-Jun
    • International Commerce and Information Review
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    • v.1 no.1
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    • pp.87-105
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    • 1999
  • A objective of this study is to examine a commercial practices and analyze a trade environment for a successful launch of Indonesian market. In general, Indonesian trade environment is composed of a natural environment, religious peculiarity, history and politic, an economic prospect. In order to understand a commercial practice exactly and then be possible a favorable business achievement, a natural character, a mode of living, custom of a meal and invitation, custom of gift, religious taboo, a human relationship, commercial power, a tendency of product preference should be recognized. The results of the study indicate mostly that even though an excellent brand image, a good Quality and an efficient sales network are a basic factor for making of a successful business. However practically it is more important to understand a business custom and a natural character of Indonesian. Because business is made up of through relation between human being eventually.

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Genetic diversity in kiwifruit germplasm evaluated using RAPD and SRAP markers (RAPD와 SRAP 마커를 이용한 참다래 유전자원의 유전적 다양성)

  • Cho, Kang Hee;Kwack, Yong-Bum;Park, Seo Jun;Kim, Se Hee;Lee, Han Chan;Kim, Mi Young
    • Journal of Plant Biotechnology
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    • v.44 no.3
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    • pp.303-311
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    • 2017
  • In this study, random amplified polymorphic DNA (RAPD) and sequence-related amplified polymorphism (SRAP) analyses were used for evaluation of genetic diversity of 61 kiwifruit (Actinidia spp.) germplasms including domestic and overseas collection cultivars. Forty RAPD primers were detected in a total of 230 polymorphic bands with an average of 5.75. Thirty-two SRAP primer combinations were detected in a total of 204 polymorphic bands with an average 6.38. By unweighted pair-group method arithmetic average cluster analysis using 434 polymorphic bands, kiwifruit germplasms were classified in three groups with similarity value of 0.680. Cluster I consisted of 46 kiwifruit germplasms belonging to A. deliciosa, A. chinensis, A. deliciosa ${\times}$ A. arguta, A. chinensis ${\times}$ A. arguta, and A. chinensis ${\times}$ A. deliciosa. Cluster II consisted of seven germplasms belonging to A. arguta and 'Skinny Green', a cultivar derived from a cross between A. arguta and A. deliciosa. Cluster III consisted of seven germplasms belonging to A. rufa, A. hemsleyana, A. macrosperma, A. polygama, and A. eriantha. Genetic similarity values among tested kiwifruit germplasms ranged from 0.479-0.991, and average similarity value was 0.717. Similarity value was highest (0.991) between NHK0038 (A. deliciosa) and NHK0040 (A. deliciosa), and lowest (0.479) between 'Hayward' (A. deliciosa) and K5-1-22 (A. arguta).

A NOTE ON CONNECTEDNESS IM KLEINEN IN C(X)

  • BAIK, BONG SHIN;RHEE, CHOON JAI
    • The Pure and Applied Mathematics
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    • v.22 no.2
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    • pp.139-144
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    • 2015
  • Abstract. In this paper, we investigate the relationships between the space X and the hyperspace C(X) concerning admissibility and connectedness im kleinen. The following results are obtained: Let X be a Hausdorff continuum, and let A ∈ C(X). (1) If for each open set U containing A there is a continuum K and a neighborhood V of a point of A such that V ⊂ IntK ⊂ K ⊂ U, then C(X) is connected im kleinen. at A. (2) If IntA ≠ ø, then for each open set U containing A there is a continuum K and a neighborhood V of a point of A such that V ⊂ IntK ⊂ K ⊂ U. (3) If X is connected im kleinen. at A, then A is admissible. (4) If A is admissible, then for any open subset U of C(X) containing A, there is an open subset V of X such that A ⊂ V ⊂ ∪U. (5) If for any open subset U of C(X) containing A, there is a subcontinuum K of X such that A ∈ IntK ⊂ K ⊂ U and there is an open subset V of X such that A ⊂ V ⊂ ∪ IntK, then A is admissible.

A study announcement about the game feeling decrease that is a sensitivity enemy in computer Based play (CBP) game transplant of a non-computer Based play (NCBP) game (비 컴퓨터플레이(NCBP)게임의 컴퓨터플레이(CBP)게임화에 따른 감성적 게임 체감(遞減)도 감소에 대한 연구 (인터페이스 디자인 및 게임도구디자인의 변화를 중심으로))

  • Kyung, Byung-Pyo
    • Journal of Korea Game Society
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    • v.3 no.1
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    • pp.18-23
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    • 2003
  • Internal organs are in a game paduk[go] to play on a printing, and a poker, Korean playing cards having cards we. And I am with all kinds of electronic amusements to do a computer with a partner and baseball, soccer, golf, tennis, several hundred to enjoy in a stadium. Most games except a computer game are local, and a case to receive a courtship is in a game during this because I need time, personnel (the other party)? and a game tool. But a computer game is single, and a game is possible, and a number for the merit that can easily play a game by an offer of all tools is, and for this reason a lot of games to enjoy in a computer please be, and it has been transplanted. I do I in order to announce that interface of a game studied a problem and an improvement plan to have let there be a few I (to game interface) if a game is ported with a computer in this study by this.

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A Study about a Characteristic to have been Reflected on Classic Dwelling Construction around Gang-Reung, a new Expressway between Sok-cho (강릉${\sim}$속초간 신설고속도로 주변 전통주거건축에 나타난 특성에 관한 연구)

  • Lee, Kun-Hyeng;Jung, Jae-Han
    • Proceeding of Spring/Autumn Annual Conference of KHA
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    • 2003.11a
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    • pp.265-270
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    • 2003
  • This expressway passing the address region that is sightseeing of our country must consider in what do a convenience sincerity chase and a cultural side view. A region with development possibility and a spinoff about a cultural element must hold consideration at the same time to a sightseeing resort. This route that passed Gang-Reung, Yang-Yang, Sok-cho was connecting an obstetrics acid, and accessibility along investigation was a hard place. In this region, a classic house is tying scattered, and JeonSaCheong inviting an ancestral mortuary tablet is appearing. The private house was divided during a classic house by using typical Gangwon to the room where a floor was introduced by house with several wings Korean floor heater center form. A characteristic form a characteristic change was appearing on each rooms and structure, a plane according to the times, and to execute extension with a lease in a direction too was able to be seen, and Confucianism a little culture very remained in construction, and a memorial service space, a closet were able to be seen. Also, this local high house had a lot of regions composed of a relative and was with doing in the village that did to these house several houses.

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LOCAL PERMUTATION POLYNOMIALS OVER FINITE FIELDS

  • Lee, Jung-Bok;Ko, Hyoung-June
    • Communications of the Korean Mathematical Society
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    • v.9 no.3
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    • pp.539-545
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    • 1994
  • Let $q = p^r$, where p is a prime. A polynomial $f(x) \in GF(q)[x]$ is called a permutation polynomial (PP) over GF(q) if the numbers f(a) where $a \in GF(Q)$ are a permutation of the a's. In other words, the equation f(x) = a has a unique solution in GF(q) for each $a \in GF(q)$. More generally, $f(x_1, \cdots, x_n)$ is a PP in n variables if $f(x_1,\cdots,x_n) = \alpha$ has exactly $q^{n-1}$ solutions in $GF(q)^n$ for each $\alpha \in GF(q)$. Mullen ([3], [4], [5]) has studied the concepts of local permutation polynomials (LPP's) over finite fields. A polynomial $f(x_i, x_2, \cdots, x_n) \in GF(q)[x_i, \codts,x_n]$ is called a LPP if for each i = 1,\cdots, n, f(a_i,\cdots,x_n]$ is a PP in $x_i$ for all $a_j \in GF(q), j \neq 1$.Mullen ([3],[4]) found a set of necessary and three variables over GF(q) in order that f be a LPP. As examples, there are 12 LPP's over GF(3) in two indeterminates ; $f(x_1, x_2) = a_{10}x_1 + a_{10}x_2 + a_{00}$ where $a_{10} = 1$ or 2, $a_{01} = 1$ or x, $a_{00} = 0,1$, or 2. There are 24 LPP's over GF(3) of three indeterminates ; $F(x_1, x_2, x_3) = ax_1 + bx_2 +cx_3 +d$ where a,b and c = 1 or 2, d = 0,1, or 2.

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A Study about Systematic Classification of a Female′s Contemporary Underwear (현대 여자 속옷의 체계적 분류에 관한 연구)

  • 이연수;김선화
    • The Korean Journal of Community Living Science
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    • v.14 no.3
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    • pp.21-30
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    • 2003
  • An underwear originated from when a human lost his purity and recognized his situation. But, it could not be sure when underwear and an outer garment were classified according to a function. An underwear has been used for a decorative and mental function, as well as a practical one. Also, it is the most fundamental medium to understand a human and a period. However, many studies on outer garments not an underwear have been done till now Therefore, this study was done to be arranged and analyzed materials scattered in order to give a correct understanding of an underwear as a clothes. The data were based on the existing fashion pamphlets, fashion magazines and other materials. The main results were as follows; Female's contemporary underwear was classified into Hosiery, Foundation and Lingerie. The Hosiery was again classified into chemise, combination, drawers and brief. The most typical hosiery was a chemise for a health and hygiene, and the drawers was adhered closely to a body. The Foundation which had a function to be well shaped was classified into Brassiere, Girdle, All in one, Body suit, Corset, Waist nipper and Garter belt. A typical contemporary foundation was a brassiere and a girdle. A brassiere had a role to support the breast up and A girdle compensate a hip area. The Lingerie which made body silhouette be vivid was classified into Slip, Panty, Wintum, Linge, Home lingerie, and so on. A slip, a panty and a lingo were typical lingeries. A slip made an outer garment be well-formed.

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SOME REMARKS ON PRIMAL IDEALS

  • Kim, Joong-Ho
    • Bulletin of the Korean Mathematical Society
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    • v.30 no.1
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    • pp.71-77
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    • 1993
  • Every ring considered in the paper will be assumed to be commutative and have a unit element. An ideal A of a ring R will be called primal if the elements of R which are zero divisors modulo A, form an ideal of R, say pp. If A is a primal ideal of R, P is called the adjoint ideal of A. The adjoint ideal of a primal ideal is prime [2]. The definition of primal ideals may also be formulated as follows: An ideal A of a ring R is primal if in the residue class ring R/A the zero divisors form an ideal of R/A. If Q is a primary idel of a ring R then every zero divisor of R/Q is nilpotent; therefore, Q is a primal ideal of R. That a primal ideal need not be primary, is shown by an example in [2]. Let R[X], and R[[X]] denote the polynomial ring and formal power series ring in an indeterminate X over a ring R, respectively. Let S be a multiplicative system in a ring R and S$^{-1}$ R the quotient ring of R. Let Q be a P-primary ideal of a ring R. Then Q[X] is a P[X]-primary ideal of R[X], and S$^{-1}$ Q is a S$^{-1}$ P-primary ideal of a ring S$^{-1}$ R if S.cap.P=.phi., and Q[[X]] is a P[[X]]-primary ideal of R[[X]] if R is Noetherian [1]. We search for analogous results when primary ideals are replaced with primal ideals. To show an ideal A of a ring R to be primal, it sufficies to show that a-b is a zero divisor modulo A whenever a and b are zero divisors modulo A.

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Molecular Phylogenetic Relationships Within the Genus Alexandrium(Dinophyceae) Based on the Nuclear-Encoded SSU and LSU rDNA D1-D2 Sequences

  • Kim, Choong-Jae;Sako Yoshihiko;Uchida Aritsune;Kim, Chang-Hoon
    • Journal of the korean society of oceanography
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    • v.39 no.3
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    • pp.172-185
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    • 2004
  • LSU rDNA D1-D2 and SSU rDNA genes of 23 strains in seven Alexandrium (Halim) species, A. tamarense (Lebour) Balech, A. catenella (Whedon et Kofoid), A. fraterculus (Balech) Balech, A. affine (Inoue et Fukuyo) Balech, A. insuetum Balech, A. pseudogonyaulax (Biecheler) Horiguchi ex Yuki et Fukuyo and A. tamiyavanichii Balech, were sequenced and the data were used for molecular phylogenetic analysis. The sequence data revealed 11 and 7 ribotypes in the LSU rDNA D1-D2 region and 4 and 17 ribotypes in the SSU rDNA region of A. catenella and A. tamarense, respectively. Other Alexandrium species had also 1 to 5 ribotypes in the two regions. With the exception of CMC2 and CMC3 of A. catenella, all A. tamarense and A. catenella strains had a common ribotype, a functionally expressed rRNA gene (here termed type A), in both gene regions. In addition to the functionally expressed gene, several pseudogenes were obtained that were found to be good tools to analyze the population designation of regional isolates by grouping them according to shared ribotypes. From the phylogenetic analysis of the sequence data determined in this study and retrieved from GenBank, the genus Alexandrium was divided into 14 groups: 1) A. tamarense, 2) A. excavatum, 3) A. catenella, 4) Tasmanian A. tamarense, 5) A. affine (and/or A. concavum), 6) Thai A. tamarense, 7) A. tamiyavanichii, 8) A. fraterculus, 9) A. margalefii, 10) A. andersonii, 11) A. ostenfeldii, 12) A. minutum (or A. lusitanicum), 13) A. insuetum, and 14) A. pseudogonyaulax. The SSU rDNA gene sequence of A. fundyense was so similar to those of A. tamarense used in this study that the two species were difficult to discriminate each other. A. tamiyavanichii was closest to the A. tamarense strain isolated in Thailand and close to the long chain-forming species of A. affine and A. fraterculus. The phylogenetic tree showed that A. margalefii, A. andersonii, A. ostenfeldii, A. minutum and A. insuetum constituted the basal relative complex, and that A. pseudogonyaulax is an ancestral taxon in the genus Alexandrium.