acta universitatis cibiniensis
Transcription
acta universitatis cibiniensis
"LUCIAN BLAGA" UNIVERSITY OF SIBIU ACTA UNIVERSITATIS CIBINIENSIS Vol. LIV Technical series Sibiu, 2007 "LUCIAN BLAGA" UNIVERSITY OF SIBIU ACTA UNIVERSITATIS CIBINIENSIS Vol. LIV Technical Series Sibiu 2007 Editorial Board: "Lucian Blaga" University of Sibiu, Romania "Hermann Oberth" Faculty of Engineering Liviu RO~CA loan ~TEFANUTA Raluca BRAD - Prof., Ph.D., Economic-Engineering Department - Assoc.Prof., Ph.D., Head of Textile Technologies Department - Lecturer, Textile Technologies Department Advisory Board (reviewers): Textile Technology Section Gheorghe ANTONIU Costea BUDULAN - Prof. PhD., Faculty of Textiles and Leather Engineering, la~i, Romania - Prof. PhD., Faculty of Textiles and Leather Engineering, la~i, Romania Mrazek TIRI Radko KOV AR Alexandru POP A Cri~an POPESCU . - Prof. PhD., Technical University of Liberec, Czeh Republic - Prof. PhD., Technical University of Liberec, Czeh Republic - Assoc. Prof. PhD., "Aurel Vlaicu" University of Arad, Romania - Prof. PhD., DWI an der RWTH Aachen e.V., Germany Business and Management Section Ronald 1. EBERT Charles FRANZ - Prof. Emeritus, Ph.D., Management Department, College of Business, University of Missouri, Columbia, USA - Assoc.Prof, Ph.D., Management Department, College of Business, University of Missouri, Columbia, USA ISSN 1583 - 7149 Address for correspondence: "Lucian Blaga" University of Sibiu "Hermann Oberth" Faculty of Engineering 4 Emil Cioran Str. 550025 - Sibiu, Romania e-mail: Textile Technology Section: Business And Management Section: Raluca.Brad@ulbsibiu.ro Li vi U.Rosca@ulbsibiu.ro CONTENTS TEXTILE SECTION 1. Supramolecular Structure and Strain Measure in Fibre Drawing Vasile BLA$CU, Costea BUDULAN, CorinaBRAN, Narcisa VR.ANCEANU...... 2. 3 Polyester Fiber Morphology and Related Dyeing Properties by the Critical Dissolution Time Vasile BLA$CU, Narcisa VRANCEANU 3. 4. ............................. 9 Studies on the Morphology of PES Fibers by Critical Dissolution Time Vasile BLA$CU, Narcisa NCEANU. . . . .. . . .. . .. . . . . . . . .. . . .. . . . . . . . . . .. .. . . .. . . . . The Influence on the Stitching of Some Technological Parameters 15 Strength of the Fabrics Used for Footwear Uppers Florentina HARNAGEA 5. THOMAS. . . . .. .. . . . . . . . . .. . .. . . . . . . . . . . . . . .. .. . . . . . . .. . . .. . . . . . . . . .. . .. . . . .. . .. . 32 Practical Reliability Analysis Method for Repairable Entities Teodor VASIU, Adina BUDIUL BERGHlAN 8. 24 A Study on Colour Base of Complexion Aney THOMAS......................................................................... 7. 20 A study on Retail Fashion Marketing boom to the Textile industry Aney 6. .. . .. .. . . . .. .. .. .. .. . .. .. . ... . .. .. . .. . . .. . ... .. . . . . .. .. .. ,... 38 Chitosan Based Post Treatment for Cotton Fabric Ink Jet Printed with Pigmented Inks: Part I Nasar MOMIN, Rajiv PADHYE, Kanesalingam SINNAPPOO ............... BUSINESS & MANAGEMENT 9. SECTION Sustaineble Corporate Governance Sunhilde CUC ........................................................................... 10. 43 Communication 53 Technologes for Master Degree in Quality Management Liviu MOLDOVAN. . . .. . . . . .. .. .. .. . . . . . . . . . . . . . . .. . . . . . . . . . . . . .. . . .. . . . . . . .. . . . ... .. . . . 57 11. Annual Energy Saving for Power Delivery Capacitor Compensation MarianaDUMITRESCU. ... .. ........ .. .... .. ." .. .. ... ... .. ..... ... .... .. ..... 63 12. How to Compute Economical Damages for Power System Outages Mariana D UMITRESCU . .. .. . . . . .. . . .. .. . .. . . . . . .. . .. . . . .. . . .. . . . . . . . . . . . . . . . . . . . .. . . .. .. 69 13. Innovation, Key Factor for the Economic Development of Today's Romania Irina Gabriela MDULESCU.. . . . . . .. . .. . .. . . .. .. . . .. .. . . . . .. .. . . . . . . . . . . . .. . . . .. .. .. . .., 75 14. Knowledge Based Organizations on Public Sector IonPOPA, IrinaGabrielaRadulescuandLiviuDumitra~cu 15. Strategic Risk, Uncertainty 80 ... ........... 87 and Fuzziness Mirela ILOIU, Diana CSIMINGA... ... 16. .. ... ..... .. .. .. , .., Some Aspects Concerning System's Reliability Calin DENE~ Author Index. ... . . . . .. ., . .. . ... . .. . . . ... ... .. . . .. . . .. . .. . . ... .. .. . .. .. . .. . . . .. . . . . . . . . . . ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... 2 92 100 SUPRAMOLECULAR STRUCTURE AND STRAIN MEASURE IN FIBRE DRAWING Vasile BLA~CU, Costea BUDULAN, Corina BRAN, Narcisa VRANCEANU Technical University, Faculty of Textile and Leather Engineering Ia$i, Romania Abstract: Dependent on the type of polymer, the micelles would have either a fibrillar (prolate) or lamellar (oblate) shape and be linked by connective chain molecules, like beads on a string, while either in one, or in both lateral directions they would be joined by traversing molecules. The shape of the micelles inferred agree with those published in a survey of morphological observations. It has been found that the semi-empirical relation also applies to the deformation and orientation of polymers in the rubber-like state. Keywords: Textile fibres, supramolecular structure, fibre drawing, micelle POLYESTER FIBER MORPHOLOGY AND RELATED DYEING PROPERTIES BY THE CRITICAL DISSOLUTION TIME Vasile BLA~CU, Narcisa VRANCEANU Technical University, Faculty of Textile and Leather Engineering Ia~i, Romania Abstract: Critical Dissolution Time (CDT) of polyester yam in phenol or phenol/tetrachlorethane (TCE) mixture was found to be an extremely sensitive technique for measuring fiber crista1linity and for detecting small morphological differences between untextured fibers and differences due to heat treatment. Pure phenol at 60° C is quite suitable for measuring differences in fiber crystallinity due to local treatment, while phenolrrCE 1:3 at 25° C amplifies the differences between yams before heat treatment. The effect of phenolrrCE ratio was studied and an increase in phenol percent in the mixture decreases the CDT. Log CDT was found to have a linear relationship with fiber density and dye adsorption, CDT technique was used to monitor uniformity of untextured and textured. Keywords: Polyester fiber, fiber density, crystallinity, untextured yarn, textured yarn STUDIES ON THE MORPHOLOGY OF PES FIBERS BY CRITICAL DISSOLUTION TIME Vasile BLA~CU*, Narcisa VRINCEANU** Technical University, Faculty of Textile and Leather, Ia$i, ROMANIA * ** "Lucian Blaga" University, Faculty of Engineering, Textile Technology Department, Sibiu, ROMANIA Abstract. The dissolution of the fibre takes place on the penetration of the solvent sufficient enough to break down the intennolecular forces to an extent that molecular chains become virtually free, and this is observed as a mechanical failure of the fibre under tension due to the load. The tension on the fiber influences the critical dissolution time (CDT) significantly. Since the tension leads to the orientation of the molecular chains, it appears that the increase in CDT is due to the restriction to the diffusion of phenol molecules into the oriented space of the polyester (PES) fibre kept under tension. The results imply that in addition to the crystallinity, the size, and the stability of the crystalline portions of the fibre, the orientation also influences the CDT. Keywords: PES fibres, critical dissolution time (CDT), crystallinity THE INFLUENCE OF SOME TECHNOLOGICAL PARAMETERS ON THE STITCHING STRENGTH OF THE FABRICS USED FOR FOOTWEAR UPPERS Florentina HARNAGEA Technical University "Gh.Asachi", Iassy Faculty of Textile and Leather Abstract: The manufacturing of sport and protective shoes implies the use of various fabrics. The stitching strength is influenced by a series of technological parameters such as: the shape of the needle's top, the needle's diameter, the seam thickness, the number of seams, the gauge of the thread, the type of seam and the components arrangement in the joint. This paper presents the results of the research concerning the stitching strength of the coated textiles used for footwear uppers. Keywords: coated fabric, stitch strengtfL,_'!:.eedle,stitch density, open seam, lapped seam A STUDY ON RETAIL FASHION MARKETING BOOM TO THE TEXTILE INDUSTRY Aney THOMAS Textile Engineering Department, Bahirdar University, Bahirdar, Ethiopia Abstract: Retail Fashion Marketing includes all activities involved in the selling of fashion products or services directly to final customers for their personal, non-business use. It encompasses all the activities needed to sell merchandise but focuses especially on visuals, advertisements, publicity and special events. Though the list of such activities is exhaustive, Retail Fashion Marketing has its limits. The idea of fashion advertising is to create wants that ultimately lead to purchase behavior. It is aimed at creating an overwhelming desire for a specific fashion product or accessory. A fashion product normally transcends the level of a basic human need. It may be possible for one to do without it. Thus the job of a fashion advertiser is made more difficult. He has to not only create a perceived value for the product but also make it brand specific. This calls for unique creative and marketing skills. Keywords: Trickle up, trickle down, Fashion marketing, retail marketing. A STUDY ON COLOUR BASE OF COMPLEXION Aney THOMAS Textile Engineering Department, Bahirdar University, Bahirdar, Ethiopia Abstract: Selection of dress on the basis of complexion is no more applicable. The studies have shown that more than complexion, the color bases of the individual's affects the personality of the person. Earlier theories were based on complexion like Tan, dark, wheat, and fair skin. But many research studies were again bringing another classification of these complexions. Each body complexions like Tan, dark, wheat and fair, may be base on yellow base and blue base. on the basis of this theory the present study proved that color base has a good influence on the personality. PRACTICAL RELIABILITY ANALYSIS METHOD FOR REPAIRABLE ENTITIES Teodor VASIU, Adina BUDIUL BERGHIAN Engineering Faculty of Hunedoara Abstract: In this research report are reviewed mathematical models which can be applied in order to asses reliability of complex entities and in this respect here is presented a real example of reliability determination for a rolling mill, starting from collection of experimental data up to interpretation of conclusions resulted from statistical processing. Keywords: mathe/11atical models, operation/failure process, reliability CHITOSAN BASED POST TREATMENT FOR COTTON FABRIC INK JET PRINTED WITH PIGMENTED INKS: PART I Nasar MOMIN, Rajiv PADHYE, Kanesalingam SINNAPPOO School of Fashion & Textiles, RMIT University Melbourne, Victoria, Australia Abstract: In this study, chitosan based post treatment for fixation of pigmented inks on digitally printed cotton fabric was investigated. The cotton samples were printed with HP Deskjet 880C Printer using the pigment based black ink and Epson Stylus C45 printer using the four colours Cyan, Magenta, Yellow, Black (CMYK) pigment based inks respectively. Chitosan and its water soluble derivative, N-carboxymethyl Chitosan (NCMC) were applied to printed cotton samples by pad-dry-cure method. Three commercial textile binders were also applied in the similar manner for comparative study. The post treated samples were analysed for degree of fixation, Colour difference, Hue difference, Lightness, Chroma, wash fastness as well as dry and wet rub fastness. It was found that chitosan could fix the pigmented inks unto cotton if applied by pad dry cure method. The water soluble chitosan derivative was not that effective in telIDS of degree of fixation. Chitosan outperformed the commercial binders in terms of degree of fixation. The fabric samples post treated with chitosan showed excellent fastness to washing. The dry rub fastness was good for the Chitosan treated samples while the wet rub fastness were also found to be acceptable. The patent application for the findings of this work is in progress. Key words: ink jet printing, chitosan, pigmented inks, cotton SUSTAINABLE CORPORATE GOVERNANCE Sunhilde eue University of Oradea Abstract: After a brief review of corporate governance definition this paper presents the concept of Sustainable Corporate Governance as a strategy to govern the corporation of tomorrow. A company that is well governed is one that is accountable and transparent to its shareholders and other stakeholders such as employees, creditors, customers and society at large. Better corporate governance allows companies to recognize and act to fulfill their environmental and social responsibilities. Accordingly, it contributes long-term, sustainable growth of companies. Keywords: Corporate Governance, Corporate Social Responsibility, Sustainable Development COMMUNICATION TECHNOLOGES FOR MASTER DEGREE IN QUALITY MANAGEMENT By Liviu MOLDOVAN "Petru Maior" University of Targu-Mure~ Abstract: Master education in Quality Management at "Petru Maior" University in Targu-Mure~ has been transformed by use of interactive distance learning. The model for interactive distance learning is a natural extension of its traditional educational environment (regular courses face to face) and will form the foundation for the future development of professional and distance education at the University. In this paper is presented an introduction to the evolution of the distance learning model, a description of the techniques, technologies and design strategies involved in developing the synchronous and asynchronous components of a course, and an overview of implementation issues. Key words: distance learning model, asynchronous/ synchronous technology. ANNUAL ENERGY SAVING FOR POWER DELIVERY CAPACITOR COMPENSATION Mariana DUMITRESCU "Duniirea de ios" University of Galati Abstract: The paper presents the annual savings computation and the economic benefit for a real power delivery system when an adequate reactive power correction system is proposed. First we built a data base for the electrical equipments used in the real power delivery analyzed system. Second, we realized a power flow monitoring and analysis, in the case study, to select the most adequate area from economical point of view for capacitor compensation. As a result, using DINIS professional power system analysis software, active and reactive power flow and bus tension levels calculations are made. After that the size and the location of the capacitor on the primary distribution feeders is obtained. The paper focuses on the procedure for sizing and location optimization of the capacitors. A load duration curve algorithm for the HVILV transformer stations from the analyzed network is presented. The optimization criterion is the annual energy saving maximization. This will involve also the annual economic benefits maximization for the case study. Keywords: capacitor, ennergy saving, power delivery HOW TO COMPUTE ECONOMICAL DAMAGES POWER SYSTEM OUTAGES FOR Mariana DUMITRESCU "Duniirea de Jos" University of Galati ABSTRACT: The paper presents a state-space model for electric power systems reliability study used to compute the outages time and economical damages during a year. The most commonly used dependability models are the state-space models, as generalized stochastic Petri nets (GSPN). Due to its logical subnet, a complex model result even for simple repairable systems. Combining the GSPN properties and high level Petri nets facilities, a simplified model, having the same modeling power as GSPN, is built -Logical Explicit Stochastic Petri Nets (LESPN)-. Architectural modules for parallel, series, series-parallel repairable systems are elaborated. These modules will be used in repairable electric power systems dependability modeling (but not only). A computerized tool SPNE is created to compute the dependability metrics. The paper focuses on LESPN possibility to realize an economical study into an electric power system. We apply the model and the SPNE computation tool for a naval electric power system dependability study. KEY WORDS: electric power system, dependability, Petri nets, efficiency. INNOVATION, KEY FACTOR FOR THE ECONOMIC DEVELOPMENT OF TODAY'S ROMANIA Irina Gabriela IUDULESCU Petroleum-Gas University of Ploie:jti Abstract: As the Romanian economy becomes a market economy, influenced by globalisation and by forces of the competition, the economic agents understand that they can no longer resist if they do not permanently adapt their business to the market economy in Romania. The rhythm of innovations, changes in products, technologies, markets and internal organisation, is faster than ever. In Romania, the innovation was brought in the '90s by the big international companies established here. But in the last years, the innovation is more and more used by 5ME's in their fight for survival and enlargement of the market quota (SME or SMEs are companies whose headcount or turnover falls below certain limits) (en.Wikipedia.org); in Romania, an enterprise is considered a 5ME if it has less than 249 employees and a turnover less than 8 million Euro/year (www.mimmc.ro). In this paper, we try to exemplify that by an original method: a scan of one of the best known economic newspapers, for a very short lapse of time, looking for innovations. Indeed, we find all the four types of innovations described in literature, in different variants. We see also the limits of innovation in Romania: no real new products or technologies, but implementation of changes that are well known abroad and new for us. KEYWORDS: innovation in 5MEs, innovation performance, innovation policy To OffP,Twhat the market expects, a firm KNOWLEDGE BASED ORGANIZATIONS ON PUBLIC SECTOR Ion POPAl, Irina Gabriela Radulescu2 and Liviu Dumitra~cu3 lAcademia de Studii Economice Bucure~ti 2Petroleum-Gas University of Ploie~ti 3 Petroleum-Gas University Ploie~ti Abstract: In the 90's, within the context of ample technological changes and under the pressure of the economic globalization, the concept of "organizations/ societies based on knowledge" started to be more used. Nowadays the fundamental features of world economy are the rapid evolution towards globalization and the use of infonnational communication technologies. This is why knowledge policies -research, innovation, education and professional training - are of a great importance for the future of a knowledge~based European Union. The article refers to the main peculiarities of knowledge-based organizations. Keywords: knowledge management, knowledge-based -- company STRATEGIC RISK, UNCERTAINTY AND FUZZINESS Mirela ILOIU and Diana CSIMINGA University of Petro~ani Abstract: Risk analysis tools based on classic probabi1istic theory open for deception through apparent accuracy in some situations because ambiguity and fuzziness is 1argely ignored. In our paper we intended to show that there are other theories that provide a better approach of the strategic risk than the probabi1istic theory. These approaches are based on fuzzy sets and the associated possibiJity theory invented by Zadeh. Keywords: strategic risk, uncertainty, ambiguity, fuzziness, SWOT analysis SOME ASPECTS CONCERNING SYSTEM'S RELIABILITY GUin DENE~ "Lucian Blaga" University of Sibiu ABSTRACT: The paper asserts the issue of calculating the provisional reliability for products with fatigue-exposed components, during the exploitation under normal working conditions. The difficulty of these calculi is caused by the intricate assessment of reliability indexes specific to variable charges. Following a brief introduction in this field, we present the particularities of the reliability calculi for fatigue-influenced elements. We then present some elements characteristic to fatigue, outlining the Wohler (durability) curve used in calculating the resistance to fatigue, (the durability curve) and using the exponential model of the reliability function. The proposed method of calculus is original, easily applicable and it allows the assessment of reliability for several types of complex products with fatigue-exposed components. Key words: products' reliability, calculating reliability indexes, fatigue, variable loads