• Title, Summary, Keyword: Segment type

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Numerical study on the connection type of inner-slab in double deck tunnel (복층터널 내부슬래브의 연결형식에 관한 수치해석적 연구)

  • Lee, Ho-Seong;Moon, Hyun-Koo
    • Journal of Korean Tunnelling and Underground Space Association
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    • v.18 no.5
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    • pp.441-451
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    • 2016
  • This study analyzed behavior of the segment lining considering connection type between inner-slab and segment lining for a double deck tunnel by Shield TBM. In order to establish the design requirements of inner-slab and segment lining in double deck tunnel, inner structure of double deck tunnel at each purpose was analyzed and compared connection type between inner-slab and segment lining. And analyses have been carried out through the beam-spring model by MIDAS Civil 2012. As a result of this study, inner-slab, connection type of between inner-slab and segment lining and Lateral earth pressure coefficients were analyzed to verify the significant design factors.

Characteristics of a 4-phase Segment Type Switched Reluctance Motor

  • Higuchi, Tsuyoshi;Yamaguchi, Daiki;Abe, Takashi;Yokoi, Yuichi
    • Journal of international Conference on Electrical Machines and Systems
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    • v.3 no.3
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    • pp.235-240
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    • 2014
  • A novel segment type switched reluctance motor (SRM) as a rare-earth-less motor is proposed. The torque was increased by 40% and the radial force was decreased by 76% compared with the same size usual variable reluctance (VR) type SRM. Increasing the average torque, however, caused increasing torque ripple. In this paper we develop a 4-phase segment type SRM and show that the torque ripple can be decreased well.

An Ergonomic Study on the Search of Body Surface Area Changed by Movements -In the Lower Trunk and Leg- (동작(動作)에 따른 체표면변화부위(體表面變化部位)의 모색(摸索)에 관한 인간공학적(人間工學的) 연구(硏究) - 하반신(下半身)을 중심(中心)으로 -)

  • Cho, Sung Hee
    • Journal of the Korean Society of Clothing and Textiles
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    • v.17 no.4
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    • pp.608-621
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    • 1993
  • The Purposes of this study were 1)to find the body surface total line and segment line significantly(${\alpha}$=0.05) changed by the leg movement including all movement direction of hip joint, knee joint and ankle joint for the more functional clothing. 2)to classify them into 3 types-expansion type, contraction type, expansion & contraction type, and 3)to identify the characteristics of the body surface length changes. 10 Crosswise and 5 lengthwise body surface total lines and 48 crosswise & 39 lengthwise body surface segment lines of 26 female college students aged from 18 to 24 years were measured directly on the body surface and were analyzed by ANOVA & Multiple Comparison Test (Tukey). The results were as following : Body surface total lines significantly changed were all the body surface total lines except abdoman girth, 1/2thigh girth of lower leg and ankle girth, and these were classified into 3 types : Center front leg line belonged to expansion & contraction type, whereas lateral leg line, legscye girth, and total crotch length belonged to contraction type. The rest belonged to expansion type. Knee girth showed maximum expansion, whereas center front leg line showed maximum contraction. Body surface total lines have shown large expansion crosswise whereas lengthwise they have mainly shown contraction. At least more than one component segment line of each body surface total lines except abdoman girth and ankle girth have shown significant change. Top segment of inner leg line showed maximum expansion. whereas just below top segment of center front leg line showed maximum contraction. Crosswise all the body surface segment lines have shown expansion except inner back segments of thigh girth and 1/2thigh girth of upper leg which have shown contraction. Lengthwise they have shown both expansion and contraction according to the location of front or back, and below or upper 1/2thigh girth line except the component segment lines of lateral leg line, which has shown contraction only.(cf. figure 2. figure 3. and table 2-2).

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An Optimal Design of a Vertical Guide Bearing for Vibration Reduction (축계 진동 저감을 위한 수직형 안내 베어링의 최적 설계)

  • Ha, Hyun-Cheon;Park, Chul-Hyun;Kim, Hyung-Ja
    • Journal of the Korea Society For Power System Engineering
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    • v.5 no.3
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    • pp.64-72
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    • 2001
  • This paper describes an optimal design technology in a segment type vertical guide bearing for vertical rotating machinery. Segment type vertical guide bearings have widely used for vertical rotating machinery, however bearing problems, such as excessive vibration and temperature rise, frequently take place in the actual machine. Such excessive vibration magnitude and/or abnormal bearing metal temperature rise result in serious damage and economic losses. Thus the segment type vertical guide bearing should be designed to get optimal characteristics in order to maintain stable operation without bearing failure due to abnormal vibration and/or abnormal bearing metal temperature. The preload ratio is the most important parameter in designing the segment type vertical guide bearing. Because adjustment of the bearing preload by changing the bearing clearance could easily control both the bearing stiffness and the cooling effect. In the paper, the influence of the preload effects on the bearing metal temperature and the bearing stiffness has been investigated both theoretically and experimentally in order to find out an optimum preload ratio. Results show that the segment type vertical guide bearing has an optimum preload ratio at which the bearing stiffness reaches a masimum value while the bearing metal temperature is minimized.

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Approximate Solution of Vertical Wave Board Oscillating in Submerged Condition and Its Design Application (수직 평판 요소의 수중동요 근사해와 설계 적용)

  • Oh, Jungkeun;Kim, Ju-Yeol;Kim, Hyochul;Kwon, Jongho;Lew, Jae-Moon
    • Journal of the Society of Naval Architects of Korea
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    • v.55 no.6
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    • pp.527-534
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    • 2018
  • The segment of the piston type wave board has been expressed as a submerged vertical line segment in the two dimensional wave flume. Either end of vertical line segment representing wave board could be located in fluid domain from free surface to the bottom of the flume. Naturally the segment could be extended from the bottom to the free surface of the flume. It is assumed that the piston motion of the wave board could be defined by the sinusoidal oscillation in horizontal direction. Simplified analytic solution of the submerged segment of wave board has been derived through the first order perturbation method in water of finite depth. The analytic solution has been utilized in expressing the wave generated by the piston type wave board installed on the upper or lower half of the flume. The wave form derived by the analytic solution have been compared with the wave profile obtained through the CFD calculation for the either of the above cases. It is appeared that the wave length and the wave height are coincided each other between analytic solution and CFD calculation. However the wave form obtained by CFD calculations are more closer to real wave form than those from analytic calculation. It is appeared that the linear solutions could be not only superposed by segment but also integrated by finite elements without limitation. Finally it is proven that the wave generated by the oscillation of flap type wave board could be derived by integrating the wave generated by the sinusoidal motion of the finite segment of the piston type wave board.

Synthesis and Properties of Poly (trifluoropropylmethyl -dimethyl) Siloxane-Polyurea Copolymers (II)-Synthesis and Mechanical Properties of Polysiloxane-Polyurea Copolymers- (폴리(트리플루오로프로필메틸-디메틸)실록산-폴리요소 공중합체의 합성과 성질(II) -폴리실록산-폴리요소 공중합체의 합성과 기계적 성질-)

  • 박성균;고석원
    • Textile Science and Engineering
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    • v.33 no.3
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    • pp.263-272
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    • 1996
  • In order to improve the mechanical properties and to utilize the useful properties of siloxane, -(AB) - type copolymers hove been the subject of study. The copolymers composed of siloxane(A) with functionalized end group as a soft segment and organic polymer(B) as a hard segment. In this study, -(AB) - type polysiloxane-polyurea copolymers were synthesized by reacting the g, m aminopropyl-terminated poly(1,1,1-kifluoropropylmethyl-dimethy1) siloxane as a soft segment and 4,4'-dicyclohexyl methane diisocyanate(H-MDI) and then 4,4'-methylenebis(cyclohexyl amice)Pl-DAM) as a hard segment in a mixed solvent system of THFINMP. It was found that there was THF/NMP mixture ratio to dissolve the copolymers according to the variations of siloxane content and F/O composition. The effects of the siloxane content, molecular weight, block length and the composition upon the mechanical properties were investigated. It was shown that the mechanical properties related to the degree of phase mixing of hard segment and soft segment.

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Phonetic Approach or Phonological Approach: Syntax-prosody Interface in Seoul Korean

  • Utsugi, Akira
    • Speech Sciences
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    • v.11 no.4
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    • pp.207-221
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    • 2004
  • There are two different approaches in studying mapping between syntactic structure and prosody, the 'phonetic approach' and the 'phonological approach'. An experiment to examine which approach is more valid was conducted. In the experiment, syntactically ambiguous Seoul Korean sentences in each of which a noun immediately after an adjective starts with either an H-segment (a segment which triggers the AP-initial H tone) or an L-segment (a segment other than H-segments) were recorded. by 3 Seoul Korean speakers. The F0 values in the syllables containing the consonants in question were then measured. The results show that interaction between the segment type and the branching structure is statistically significant. which suggests that it is difficult to use the phonetic .approach to generalize the relationship between syntax and prosody. Thus, it is concluded that the phonological approach is more valid.

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Deriving TrueType Features for Letter Recognition in Word Images (워드이미지로부터 영문인식을 위한 트루타입 특성 추출)

  • SeongAh CHIN
    • Journal of the Korea Society for Simulation
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    • v.11 no.3
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    • pp.35-48
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    • 2002
  • In the work presented here, we describe a method to extract TrueType features for supporting letter recognition. Even if variously existing document processing techniques have been challenged, almost few methods are capable of recognize a letter associated with its TrueType features supporting OCR free, which boost up fast processing time for image text retrieval. By reviewing the mechanism generating digital fonts and birth of TrueType, we realize that each TrueType is drawn by its contour of the glyph table. Hence, we are capable of deriving the segment with density for a letter with a specific TrueType, defined by the number of occurrence over a segment width. A certain number of occurrence appears frequently often due to the fixed segment width. We utilize letter recognition by comparing TrueType feature library of a letter with that from input word images. Experiments have been carried out to justify robustness of the proposed method showing acceptable results.

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A New Moving Mobile Base Station (MMBS) Scheme for Low Power RMIMS Wireless System(PartII:Multiple MMBS service schemes for RMIS QoS guarantee) (저전력 RMIMS 무선 터미널을 위한 새로운 움직이는 이동 기지국 시스템 구조(2부:QoS 보장을 위한 다중 MMBS 서비스 구조))

  • 박수열;고윤호;유상조;김성대
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.24 no.12B
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    • pp.2320-2334
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    • 1999
  • In this paper, we propose multiple IS-MMBS service schemes for very low power and micro-size RMIMS (radio-interfaced micro information monitoring system) terminals. In MMBS service area, when new arrival RMIMS terminals have real-time traffic characteristic or large traffic bandwidth, only single IS-MMBS service scheme can not guarantee RMIMS terminal's QoS(quality of service) such as buffer overflow or packet loss. In this case, the proposed multiple IS-MMBS service schemes can be effectively used for QoS service of RMIMS terminal. According to clustering method of RMIMS terminals and MMBS segment method, the proposed schemes can be divided into terminal segment method, region segment method, application based segment method, traffic type based segment method, overlapping segment method and hybrid segment method

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A Study on Thai Seaweed Market Segmentation by Purchasing Attributes (구매속성에 의한 태국 김 시장세분화에 관한 연구)

  • Jang, Young-Soo;Kim, Ji-Ung
    • The Journal of Fisheries Business Administration
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    • v.48 no.3
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    • pp.1-14
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    • 2017
  • The aim of this study is to examine profiles of consumers in Thai seaweed market segments. A total of 321 consumers were surveyed in bangkok, thailand. The multiple regression analysis performed indicates that consumer preference toward seaweed snack is significantly influenced by seaweed consumption frequency. The cluster analysis performed indicates that there are three segments based on consumer purchasing attributes toward seaweed snack : leading type, pursuing type, beginner type. The results show that there are consumer segment with different purchasing attributes level and seaweed preference. in this study Thai seaweed market's biggest consumer is leading type consumer(n=40.8%) that have high level of purchasing attributes toward seaweed snack when compared to other segments. pursuing type segment(n=27.4%) consists of consumers who have low level of purchasing attributes but have high consumption frequency. beginner type segment(n=31.8%) consists of consumers who rarely eat seaweed snack and have high price sensitivity. This study can inform Thai seaweed consumer's behavior and effective segment market strategies and target consumer based on purchasing behavior toward seaweed snack.