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A Study on the Extru-Bending Process of the Angle Product with non-Symmetric "ㄱ" Section (비대칭 "ㄱ" 단면 앵글제품의 압출굽힘 가공에 관한 연구)

  • 이경국;진인태
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • pp.277-280
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    • 2003
  • It was investigated that the "ㄱ" type angle product could be bended with a curvature during extrusion by extru-bending process. The bending process for the "ㄱ" type angle product can be developed by the hot metal extru-bending machine with the two punches moving in the different velocity. Because of non-symmetry of product, it is important to design the ruled surface contour of dies cavity for the welding and bending with two billets. So it is designed that the multi-hole container has two non-symmetric holes and non-symmetric contour of dies entrance. The results of the experiment show that "ㄱ" type angle product can be bended by the extrusion process and that the curvature of the product can be controlled by the velocity of punch and that the defects such as the distortion of section and the thickness change of the product and the folding and wrinkling of the product did not happen after the bending processing by the extrusion bending machine.

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Development of a STEP-compliant Web RPD Environment (STEP표준과 Web을 이용한 RPD환경 구축)

  • 강석호;김민수;김영호
    • Korean Journal of Computational Design and Engineering
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    • v.5 no.1
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    • pp.23-32
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    • 2000
  • In this paper, we present a Web-enabled product data sharing system for the support of RPD (Rapid Product Development) process by incorporating STEP (STandard for the Exchange of Product model data) with Web technology such as VRML (Virtual Reality Markup Language), SGML (Structured Generalized Markup Language) and Java. Extreme competition makes product life cycle short by incessantly deprecating current products with a brand-new one, and thus urges enterprises to devise a new product faster than ever. In this environment, an RPD process with effective product data sharing system is essential to outstrip competitors by speeding up the development process. However, the diversity of product data schema and heterogeneous systems make it difficult to exchange the product data. We chose STEP as a neutral product data schema and Web as an independent exchange environment to overcome these problems. While implementing our system, we focused on the support of STEP AP 203 UoF (Units of Functionality) views to efficiently employ STEP data models that are maximally normalized, and therefore very cumbersome to handle. Our functionality-oriented UoF view approach can increase users'appreciation since it facilitates the modular usage of STEP data models. This can also enhance the accuracy of product data. We demonstrate that our view approach is applicable to the configuration control of mechanical assemblies.

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An Integration of Product Data Management and Software Configuration Mangement (제품자료관리와 소프트웨어구성관리 통합)

  • Do, Nam-Chul;Chae, Gyoeng-Seok
    • Korean Journal of Computational Design and Engineering
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    • v.13 no.4
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    • pp.314-322
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    • 2008
  • This paper introduces an integration of Product Data Management (PDM) and Software Configuration Management (SCM). PDM and SCM have supported development of mechanical products and software products respectively. The importance of software components in the current products increases rapidly since the software enables the products to satisfy various customer requirements efficiently. Therefore the current product development needs enhanced product data management that can control both the hardware and software data seamlessly. This paper proposes an extended product data model for integrating SCM into PDM. The extension enables PDM document management to support the version control for software development. It also enables engineers to control both the software and hardware parts as integrated data objects during product configuration and engineering change management. The proposed model is implemented by using a commercial Product Lifecycle Management (PLM) system and a development of a network based robot system is tested by the implemented product development environment.

Shrimp By-product Feeding and Growth Performance of Growing Pigs Kept on Small Holdings in Central Vietnam

  • Nguyen, Linh Q.;Everts, Henk;Beynen, Anton C.
    • Asian-Australasian Journal of Animal Sciences
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    • v.16 no.7
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    • pp.1025-1029
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    • 2003
  • The effect studied was that of the feeding of shrimp by-product meal, as a source of eicosapentaenoic and docosahexaenoic acid, on growth performance and fatty acid composition of adipose tissue in growing pigs kept on small holdings in Central Vietnam. Shrimp by-product meal was exchanged with ruminant meal so that the diets contained either 0, 10 or 20% shrimp byproduct meal in the dry matter. The diets were fed on 6 different small-holder farms. The farmers fed a base diet according to their personal choice, but were instructed as to the use of shrimp by-product and ruminant meal. The diets were fed to the pigs from 70 to 126 days of age. There were three animals per treatment group per farm. The diets without and with 20% shrimp by-product meal on average contained 0.01 and 0.14 g docosahexaenoic acid/MJ of metabolisable energy (ME). Due to the higher contents of ash and crude fiber, the shrimp by-product meal containing diets had lower energy densities than the control diets. Eicosapentaenoic acid was not detectable in adipose tissue; the content of docosahexaenoic acid was generally increased after consumption of shrimp by-product meal. In spite of the concurrent high intakes of ash and crude fiber, the feeding of shrimp by-product meal had a general stimulatory effect on growth performance of the growing pigs. The intake of docosahexaenoic acid or its content in adipose tissue was not related with average daily gain. It is suggested that shrimp by-product meal may contain an unknown growth enhancing factor.

Quality Characteristics of Pan Bread containing Red Ginseng Jung Kwa By-Product (홍삼정과 부산물을 첨가한 식빵의 품질 특성)

  • Lee, Eui-Seok;You, Kwan-Mo;Jeong, Young-Nam;Jeon, Byeong-Seon;Ko, Bong-Soo;Hong, Soon-Taek
    • The Korean Journal of Food And Nutrition
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    • v.30 no.5
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    • pp.1096-1104
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    • 2017
  • This study was carried out to investigate the characteristics of the quality of bread containing Red Ginseng Jung Kwa by-product, added in ratios of 0, 10, 20 and 30% of flour. It was found in dough and bread containing red ginseng Jung Kwa by-product that dough and loaf volume, specific loaf volume, baking loss, and pH decreased with an increasing amount of red ginseng Jung Kwa by-product. In addition, loaf weight and hardness were also reduced. In particular, hardness appeared to be 2.18 times higher for bread containing 30% Red Ginseng Jung Kwa by-product as compared to the amounts found in the control. For color, increasing the amount of Red Ginseng Jung Kwa by-product reduced the L value, whereas the a and b values were increased. In the sensory evaluation, the highest overall preference score was observed in the bread containing 20% red ginseng Jung Kwa by-product, whereas the lowest score was found in the control (no red ginseng Jung Kwa by-product added). It was concluded that pan bread containing red ginseng Jung Kwa by-product could be prepared with good acceptability, and that its optimum concentrate was found to be 20% of flour.

Assessment of Anti-nutritive Activity of Tannins in Tea By-products Based on In vitro Rumen Fermentation

  • Kondo, Makoto;Hirano, Yoshiaki;Ikai, Noriyuki;Kita, Kazumi;Jayanegara, Anuraga;Yokota, Hiro-Omi
    • Asian-Australasian Journal of Animal Sciences
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    • v.27 no.11
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    • pp.1571-1576
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    • 2014
  • Nutritive values of green and black tea by-products and anti-nutritive activity of their tannins were evaluated in an in vitro rumen fermentation using various molecular weights of polyethylene glycols (PEG), polyvinyl pyrrolidone (PVP) and polyvinyl polypyrrolidone as tannin-binding agents. Significant improvement in gas production by addition of PEG4000, 6000 and 20000 and PVP was observed only from black tea by-product, but not from green tea by-product. All tannin binding agents increased $NH_3$-N concentration from both green and black tea by-products in the fermentation medium, and the PEG6000 and 20000 showed relatively higher improvement in the $NH_3$-N concentration. The PEG6000 and 20000 also improved in vitro organic matter digestibility and metabolizable energy contents of both tea by-products. It was concluded that high molecular PEG would be suitable to assess the suppressive activity of tannins in tea by-products by in vitro fermentation. Higher responses to gas production and $NH_3$-N concentration from black tea by-product than green tea by-product due to PEG indicate that tannins in black tea by-product could suppress rumen fermentation more strongly than that in green tea by-product.

Research on the Influences of New Product Design and New Product Development Process Management on New Product Development Performance in Taiwan's Industries

  • Liu, Pang-Lo;Tsai, Chih-Hung
    • The Asian Journal on Quality
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    • v.10 no.1
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    • pp.89-105
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    • 2009
  • This study aims to probe into the influence of new product design and new product development process management on development performance. The research finding demonstrates that product design reveals positive and significant influence on new product development performance. Through statistical analysis, this study finds that companies in Taiwan value new product design. When companies value it more, they tend to have better new product development performance. With regard to the relation between new product development process management and new product development performance, the empirical results demonstrate that companies would pay more attention on new product development process management. With regard to new product idea and assessment, concept design and development, product function test and mass production in the market, through statistical analysis, this study finds that companies that value process management of new product development tend to have better new product development performance. As to the influence of new product design and new product process management on new product development performance, statistical analysis result demonstrates that the integration between new product design valued by companies in Taiwan and development process management would lead to significantly positive influence on new product development performance of the companies.

SOME PROPERTIES OF PRODUCT FUZZY GROUPS, IDEALS, AND SUBRINGS

  • Chon, Inheung
    • Korean Journal of Mathematics
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    • v.13 no.2
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    • pp.203-208
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    • 2005
  • We define a product fuzzy group, which is weaker than the standard fuzzy group defined by Rosenfeld, and characterize some properties of product fuzzy groups, product fuzzy ideals, and product fuzzy subrings.

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A Study on Supplier Involvement and Buyer Strategic Decisions (공급자 참여와 전략적 선택에 대한 실증적 연구)

  • Hwang, Sunil;Suh, Eung-Kyo
    • The Journal of Industrial Distribution & Business
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    • v.9 no.4
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    • pp.53-62
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    • 2018
  • Purpose - In the development of new products, suppliers involvement and developing products jointly can be said to be strategic activities that utilize the lack of knowledge from external organizations. In this new product development, supplier involvement has been proven to have a positive impact on new product development performance for a long time by previous research. However, sufficient academic research has not been conducted on the influence of supplier involvement in various product strategies or sales strategies that buyers make in order to secure a competitive advantage in the market. This study argues that product strategy and sales strategy used by buyers in the development of new products will control the effect of supplier involvement on new product development performance in order to compensate the lack of these academic aspects. Research design, data, and methodology - Specifically, we selected the modularization strategy of the product as the product strategy, which is considered as an important strategy in the new product development through the preceding research, and the mass customer satisfaction strategy was chosen as the sales strategy. In order to achieve these research objectives, regression analysis was conducted using data from manufacturing productivity panel collected jointly by the Ministry of Industry, Trade and Industry and the Korea Productivity Center. Results - As a result, supplier involvement and new product development performances (development cost efficiency, customer satisfaction) were positively related. The product modularity strategy proved to have an interactive effect on the relationship between supplier involvement and new product development performances (development cost efficiency, customer satisfaction). However, it has not been confirmed that there is a statistically significant interaction effect between supplier involvement and new product development performances. Conclusions - Supplier involvement has positive relationships with NPD performance. In addition, product modularity strategies have interaction effects with supplier involvement and affect new product development performance (development cost efficiency and customer satisfaction). The results of this study are of academic significance in the case of lack of empirical studies on the effect of supplier participation on the effect of buyer 's strategy when a supplier participates and develops new products jointly.

Economic Tolerance Design of Quality Characteristics by the TAGUCHI's Loss Function (다구찌의 손실함수를 이용한 특성치의 경제적 허용차 설계)

  • 최문일;강창욱;황의철
    • Journal of the Society of Korea Industrial and Systems Engineering
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    • v.14 no.24
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    • pp.133-139
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    • 1991
  • If the specifications of product. in general. art determined too wide. the precision of product becomes diminished. Otherwise it costs dearly to keep the precision. Therefore, It is realistic to consider various factors in determining specification of qualify characteristics TAGUCH Idefines quality of an object as "Quality is the loss that a product causes to society after being shipped. other than any losses caused by its intrinsic function". Particularly, to improve the performances of product TAGUCHI focuses his attention on the product design and process design which enable the functional characteristics of product to he robust to noises. In this paper, by the TAGUCHI's loss function, the characteristics which affect the variation of a product performance are classified into the scrappable characteristics and the reworkable characteristics when the target values of functional characteristics have been determined. And we will determine the tolerance of each characteristic which minimize the quality cost by the cost function which considers the economic factors and probability features of each characteristic.cteristic.

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