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:
[email protected]
Li vi [email protected]
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