• Title/Summary/Keyword: Joint development

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A coupled finite element/meshfreemoving boundary method for self-piercing riveting simulation

  • Cai, Wayne;Wang, Hui-Ping;Wu, C.T.
    • Interaction and multiscale mechanics
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    • v.6 no.2
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    • pp.257-270
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    • 2013
  • The use of lightweight materials has been steadily increasing in the automotive industry, and presents new challenges to material joining. Among many joining processes, self-piercing riveting (SPR) is particularly promising for joining lightweight materials (such as aluminum alloys) and dissimilar materials (such as steel to Al, and metal to polymer). However, to establish a process window for optimal joint performance, it often requires a long trial-and-error testing of the SPR process. This is because current state of the art in numerical analysis still cannot effectively resolve the problems of severe material distortion and separation in the SPR simulation. This paper presents a coupled meshfree/finite element with a moving boundary algorithm to overcome these numerical difficulties. The simulation results are compared with physical measurements to demonstrate the effectiveness of the present method.

The Development of Multiple Talents : Conceptualization and Empirical Studies (중다지능 이론을 적용한 창의적인 영재 양성교육)

  • Wu, Wu-Tien
    • Proceedings of the Korean Society for the Gifted Conference
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    • 2002.05a
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    • pp.9-30
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    • 2002
  • A 4-year joint research project (1999-2003), entitled "The Development of Multiple Talents (DMT)", has been designed and carrying out under the sponsorship of the National Science Council, R.O.C. (Taiwan). A 3-dimension construct is proposed for the DMT: form of talents (10 forms, mainly based on Gardner′s theory of multiple intelligences), function of talents (3 functions, based on Stemberg′s conception of successful intelligence), and developmental stage (4 stages, from pre-school to senior high). To take an example of its empirical studies, Wu and Chien (2000), based on a renovated conception of personal intelligence, developed the "Personal Intelligence Inventory" (PII). By means of the PII, it was found that there were some personal intelligence differences between gifted and regular pupils: however, gifted group was not as superior as on academic performance to the regular one (Wu '||'&'||' Chien, 2000). It was also found that there were significant relationships between pupils′personal intelligence and school adjustment in both groups (Tsai '||'&'||' Wu, 2000).

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Development of High-Frequency Induction Heating Method Using Adhesive Waterproofing Sheet Laminated with Aluminum Sheet (알루미늄 박판 점착 복합 방수시트를 이용한 고주파 유도가열 방수공법 개발 평가 연구)

  • Kim, Yun Ho;Kim, Dong Bum;Park, Jin-Sang;Oh, Sang Keun
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2011.05a
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    • pp.111-114
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    • 2011
  • Waterprooping Method with sheet need to study technology and multilateral verification considering the arctic conditions as low temperature and humidity, which is the result only considered of material aspects without environmental condition in construction But there are no measures up until now. To solve this problem by using high frequency induction heating method developed waterproof sheets, cold (5 ℃ or less) can be applied in a more stable environment, water-resistant materials and construction methods were studied for development. The results of the test showed that high frequency induction heating method is effective for usability in low temperature condition and securement of proper quality than existing Waterprooping Method with sheet need.

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The Development of Multiple Talents: Conceptualization and Empirical Studies

  • Wu, Wu-Tien
    • Journal of Gifted/Talented Education
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    • v.12 no.2
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    • pp.59-69
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    • 2002
  • A 4-year joint research project(1999-2003), entitled "The Development of Multiple Talents(DMT)", has been designed and carrying out under the sponsorship of the National Science Council, R.O.C. (Taiwan). A 3-dimension construct is proposed for the DMT: form of talents (10 forms, mainly based on Gardner's theory of multiple intelligences), function of talents (3 functions, based on Sternberg's conception of successfulintelligence), and developmental stage (4 stages, from pre-school to senior high). To take an example of its empirical studies, Wu and Chien (2000), based on a renovated conception of personal intelligence, developed the "Personal Intelligence Inventory" (PII). By means of the PII, it was found that there were some personal intelligence differences between gifted and regular pupils; however, gifted group was not as superior as on academic performance to the regular one (Wu & Chien, 2000). It was also found that there were significant relationships between pupils' personal intelligence and school adjustment in both groups (Tsai & Wu, 2000).

Application of Steel-tubed Concrete Structures in High-rise Buildings

  • Zhou, Xuhong;Liu, Jiepeng
    • International Journal of High-Rise Buildings
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    • v.8 no.3
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    • pp.161-167
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    • 2019
  • Making full use of material strength, maintaining sufficient ductility of structural components, and ensuring simple and robust connections are crucial to the development of steel-concrete composite structures. The steel-tubed concrete structure uses thin-walled steel tube to provide confinement, so that the strength and ductility of the concrete core are improved. Meanwhile, the thin-walled steel tube is terminated at the beam-column joint to avoid the local buckling problem and simplify the connections between steel tube and RC members. A brief overview of the development of steel-tubed concrete structures is presented. Through the discussion on the structural behavior of steel-tubed concrete and the introduction of typical practical projects, the prospects for future research are highlighted.

Experimental Study on the Dynamic Characteristics of a Missile Structure Depending on Fastening Method (체결 방식에 따른 유도탄의 동적 특성에 관한 실험적 연구)

  • Jeon, Ho-Chan;Song, Ohseop
    • Journal of the Korea Institute of Military Science and Technology
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    • v.22 no.4
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    • pp.452-459
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    • 2019
  • In order to design and manufacture structures such as a guided missile, assembly process with fastener is an essential method of fabrication. In this study, the dynamic characteristics of a cylindrical structure with bolted joints were studied using experimental methods. The change of the natural frequency of the structure with the change of the fastening method and the tightening torque were measured by the test and the finite element analysis was performed using the stiffness model of the fastening part according to the fastening method and compared with the test results.

Considerations in the Diagnosis and Treatment of Temporomandibular Disorders in Children and Adolescents: A Review

  • Ji-Won Ryu
    • Journal of Oral Medicine and Pain
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    • v.48 no.3
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    • pp.75-80
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    • 2023
  • Temporomandibular disorders (TMDs) are a group of musculoskeletal disorders that encompass symptoms caused by abnormalities of the craniofacial structures of the temporomandibular joint (TMJ), muscles involved in the masticatory system, and other related tissues or structures. Although TMDs can occur at any age, research on the prevalence, epidemiology, and treatment strategies of TMDs has been conducted in all age groups, but primarily in adults. Unlike adults, children and adolescents are in a period of cognitive and physical development. Because of this growth potential, children respond better to TMD treatment than adults do. However, clinicians must remember that chronic pain and growth abnormalities can occur if the patient's symptoms and signs are not accurately diagnosed and treated. This article reviews the growth and development of the craniofacial region, including the TMJ, and discusses considerations when diagnosing and treating TMDs in children and adolescents.

The Study on the Promotion of Chinese Animation Industry -A Comparison of Korea.China and Japan (중국 애니메이션산업의 수출증대방안에 관한 연구 -한국.중국.일본을 중심으로)

  • Pei, Ying-Shun;Meng, Hai-Yang;Hou, Sha-Sha;Bae, Ki-Hyung
    • The Journal of the Korea Contents Association
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    • v.18 no.3
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    • pp.456-471
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    • 2018
  • A Comparative Study on the Korean animation industry and 3 of this paper is a matter of Korea, China, Chinese animation industry and the Current Status and Problem of Chinese animation business in overseas markets.Aimed to find ways to expand exports. In order to realize this purpose with theoretical backgrounds, such as animation concept and characteristics of the research literature, look at ways a paper from an animation industry, work, China.Chinese animation development plan based on the bibliographic data and case study based on books. First, by government in terms of development measures and supplement the system and a law on the animation industry. First of all animation industry and producers To help protect the government is to become an active policy must be supported with funds and animation to ease the relevant laws and regulations and joint venture with foreign countries.Pursuing an active policy is needed. Second, an animated feature can get the full benefit of the industrial chain to and create derivative works as a multilateral needs to be improved. Third, the animation expertise to build human resources need to be nurtured. Fourth, in order to cater to overseas markets in China will create various types of Chinese traditional culture based on the animation is important. Fifth, and a mobile home page to get in. Sixth, will be easily exported to overseas markets to the creation of joint international exchange and international.

A COMPARISON STUDY ON THE COMMUNICATIVE INTENT OF CHILDREN WITH REACTIVE ATTACHMENT DISORDER AND DEVELOPMENTAL LANGUAGE DISORDER (반응성 애착장애아와 발달성 언어장애아의 의사소통 의도 비교 연구)

  • Lee, Kyung-Sook;Lee, Ho-Boon;Shin, Cheong-Hyoun;Noh, Kyung-Sun;Im, Yun-Hwa
    • Journal of the Korean Academy of Child and Adolescent Psychiatry
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    • v.8 no.2
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    • pp.207-216
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    • 1997
  • This study was conducted to investigate the communicative intent between Reactive Attachment Disorder(RAD) and Developmental Language Disorder(DLD). The subject of this study were 20 27-51 monthold children(10 RAD Children, 10 DLD children) functioning at similar stage of language development. The communicative intent was investigated vertical and horizontal dimension. Rating of vertical communicative intent was based on the assessment scales devised by Wetherby and Prutting(1984). Horizontal dimension was measured by the assessment guidelines of Wetherby and Prizant(1989). All the data were rated by two rators independantly. 1) In communicative intent, vertical development level of DLD children was more sophiscated than that of RAD children. 2) DLD children expressed more horizontal communicative intent than RAD children. The percentage of the three major categories(behavioral regulation, social interaction, and joint attention) of communicative intent in DLD children was lined up social interaction>joint attention>behavioral regulation. On the contrary, RAD children displayed in order of behavioral regulation>social interaction>joint attention. In addition, DLD children showed diversely as compared with RAD children.

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Development of Artificial Intelligence Joint Model for Hybrid Finite Element Analysis (하이브리드 유한요소해석을 위한 인공지능 조인트 모델 개발)

  • Jang, Kyung Suk;Lim, Hyoung Jun;Hwang, Ji Hye;Shin, Jaeyoon;Yun, Gun Jin
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.48 no.10
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    • pp.773-782
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    • 2020
  • The development of joint FE models for deep learning neural network (DLNN)-based hybrid FEA is presented. Material models of bolts and bearings in the front axle of tractor, showing complex behavior induced by various tightening conditions, were replaced with DLNN models. Bolts are modeled as one-dimensional Timoshenko beam elements with six degrees of freedom, and bearings as three-dimensional solid elements. Stress-strain data were extracted from all elements after finite element analysis subjected to various load conditions, and DLNN for bolts and bearing were trained with Tensorflow. The DLNN-based joint models were implemented in the ABAQUS user subroutines where stresses from the next increment are updated and the algorithmic tangent stiffness matrix is calculated. Generalization of the trained DLNN in the FE model was verified by subjecting it to a new loading condition. Finally, the DLNN-based FEA for the front axle of the tractor was conducted and the feasibility was verified by comparing with results of a static structural experiment of the actual tractor.