bluuebunny/crossref_metadata_2025 huggingface dataset:
Reliability and Validity of the Positive and Negative Perfectionism Scale Among Chinese College Students
Authors: Zhou Xueting , Wu Siyao , Zhu Hong , Cai Taisheng
Published: June 2016

Our objective was to revise the Positive and Negative Perfectionism Scale (PANPS) and then to test the reliability and validity of the Positive and Negative Perfectionism Scale-Chinese Revised (PANPS-CR). University students (N = 378) completed the PANPS, the Depression Anxiety
Stress Scale, the Satisfaction With Life Scale, and the Positive and Negative Affect Scale. Two student samples (N = 519 and 458) completed the PANPS-CR. Results of Pearson's correlation coefficients, independent samples t tests, exploratory factor analysis, and confirmatory
factor analysis showed that the PANPS-CR is a reliable and valid instrument to assess positive and negative aspects of perfectionism among Chinese college students.
Alternatives of menopausal hormone therapy
Authors: Kutlesic Ranko , Popovic Jasmina , Stefanovic Milan , Vukomanovic Predrag , Lukic Bojan , Lilic Goran
Published: June 2016

Introduction. It has been generally accepted that the benefits of menopausal
hormone therapy outweigh the risks, but there are still some concerns about
the administration of menopausal hormone therapy, which has introduced
alternative treatments. Pharmacological Alternatives. Central alpha-2 agonist
clonidine is only marginally more effective than placebo, and significantly
less effective than estrogen. Antiepileptic drug gabapentin reduces hot
flashes; however, it is less effective than estrogen. Selective serotonin
reuptake inhibitors (paroxetine and fluoxetine) and selective noradrenaline
reuptake inhibitors (venlafaxine) reduce vasomotor symptoms and improve
depression, anxiety and sleep. Results of studies about
dehydroepiandrosterone effects on menopausal symptoms are inconsistent and
additional investigations are needed. Non-Pharmacological Alternatives.
Stellatum ganglion blockade is a successful treatment for reducing vasomotor
symptoms in patients with contraindications for menopausal hormone therapy.
Efficacy of acupuncture, homeopathy and reflexology should be proved by
adequate studies. Phytoestrogens could reduce vasomotor symptoms but to a
lesser extent than conventional menopausal hormone therapy. However, they
have not been proved yet to provide cardiovascular protection and prevention
of osteoporosis, nor they could be recommended instead of traditional
menopausal hormone therapy. There is a concern about their undesirable
effects. Adequate diet, unchanging body weight within ideal values and
adequate physical activities have beneficial long-term effects, first of all
on preservation of bone density. Alternatives for Atrophic Changes of Vaginal
Epithelium. Menopausal symptoms resulting from vaginal atrophy could be
resolved by use of hydrophilic preparations, lubricants and topical lidocaine
cream or 4% lidocaine water solution for dyspareunia. Conclusion. If there
are contrain?dications to menopausal hormone therapy or patients are
unwilling to take hormone therapy, alternative treatments, which can also
solve menopausal symptoms, should be considered.
Predictors of overweight and obesity among adults aged 50 years and above: Serbian national health survey
Authors: Grujic Vera , Dragnic Natasa , Mijatovic-Jovanovic Vesna , Ukropina Snezana , Harhaji Sanja , Radic Ivana , Kvrgic Svetlana
Published: June 2016

Background/Aim. Obesity is a complex and multifactorial condition related to morbidity, mortality, poor quality of life and many other problems. The aim of the study was to determine the prevalence of overweight and obesity and factors associated with them (demographic, socioeconomic factors and lifestyle) in adults aged 50 years and above in Serbia. Methods. This cross-sectional study, representative for the population in Serbia, was carried out in one-year period, including 6,932 people aged 50 and over. Individuals were interviewed and anthropometrically examined. The association between overweight and obesity with demographic, socioeconomic and behavioral factors was analyzed using multivariate logistic regression. Results. Age, level of education and smoking were significantly associated with overweight and obesity, regardless of gender. Marital status was significantly associated with obesity, regardless of gender and with overweight only in women. Breakfast consumption habit was significantly associated with obesity only in men. There was no significant association of overweight and obesity with the type of settlement, alcohol consumption and physical activity, regardless of gender. Conclusion. The results of our study indicate the need for more intensive implementation of measures affecting the factors which contribute to overweight and obesity. Emphasis should be put on the population-based policies and programs that support environmental changes.
Protection of privacy related to criminal procedure
Authors: Pisaric Milana
Published: June 2016

Every person has the right to privacy and protection of personal data and
these rights may be restricted only in order to protect the general interest
or the preservation of important values in society. If there is a certain
degree of suspicion that a person committed a criminal offense, the
competent authorities are authorized to limit his/her privacy rights and to
collect and process personal data for the purposes of criminal proceedings,
by taking certain actions and measures in accordance with the law. On the
basis of legal authorization certain subjects may take regular and special
evidentiary actions and measures, but possible privacy infringement and data
collection should be limited to the extent necessary to suppress a specific
criminal offense in accordance with the principle of proportionality. It is
necessary and useful to apply the methods and techniques of information
technology in order to detect and prove criminal offenses. However,
uncritical regulation and voluntary application of advanced methods and
techniques of surveillance and monitoring of user?s activities (whose daily
activities increasingly rely on information technology) would create a real
risk of expanding and deepening the scope of spheres of life to be monitored
to a much greater extent than legitimate monitoring within the concept of
pro?activity and creation of a complete and panoptic surveillance of
personal data. This could not be justified by the needs to oppose even the
most severe forms of criminal offenses. Thus, actions and measures based on
the use of these techniques and methods should be laid down and applied in
accordance with the principles of specificity, necessity and
proportionality, and with control of the judicial authorities, so the right
to privacy would not be jeopardized. It is necessary to find a proper
balance between the needs of criminal proceedings and respect for human
rights, with regard to regulating powers of investigative bodies in
collecting data of individuals. In online environment, the protection of the
right to legal personality and the right to free development of personality
through the right to privacy as well as the protection of personal data are
necessary to be provided by legal regulations containing even stricter and
more precise rules (comparing to offline environment) that determine the
scope of powers of the authorities to collect evidence for the purposes of
criminal proceedings, because certain actions or measures can greatly
interfere with the private sphere of individuals in the direction of a
complete privacy annulment.
Serbian written word in the First World War struggling for national and statehood survival
Authors: Mircov Svetlana
Published: June 2016

Books and periodicals published during the First World War are expressive
witnesses of heroism and suffering of our people, of the patriotism and the
vitality, of the victims and the superhuman efforts in fighting for freedom.
Publications dedicated to the small Serbian nation, whose heroism was admired
not only by friends but also by foes, were published in Serbian language, as
well as in major world languages across Europe, North and South America and
Africa. The data on books and periodicals published in Corfu, Thessaloniki
and in Bizerte were collected, written materials bibliographically described
and systematized and will soon be published in a book under the title
Publikacije objavljene tokom Prvog svetskog rata na Krfu, u Solunu i Bizerti:
bibliografija (Publications published during the World War I in Corfu,
Thessaloniki and in Bizerte: a bibliography). In this article the author of
the bibliography presents the results of the research that resulted in a
detailed list of over 300 monographs and 16 periodicals. In addition of the
bibliographic corpus, the book contains an extensive preface, introductory
bibliographic notes and indexes, which provide a comprehensive insight into
our government, military, political, cultural and educational activities in
the Great War.
The Effect of Information Choice on Auditors' Judgments and Confidence
Authors: Smith Steven D. , Tayler William B. , Prawitt Douglas F.
Published: June 2016

SYNOPSIS

Previous research finds that individuals place more weight on information when they choose to obtain it than when they acquire the same information without explicit choice. We examine whether litigation risk and auditor experience influence auditors' susceptibility to the information choice effect, which has potential implications for audit effectiveness and efficiency. In our experiment, auditors evaluate the likelihood of an inventory obsolescence issue for a hypothetical client. We find that in a high litigation risk setting, less experienced auditors exhibit a choice effect. Surprisingly, in a low litigation risk setting, less experienced auditors appear to exhibit the reverse of a choice effect, weighting information they pursued less heavily than auditors who obtained the information without choice. We do not observe these effects of choice in the judgments of more experienced auditors. Further, we predict and find that auditors choosing to acquire information are more confident in their judgments than auditors who acquire the same information without choice. Interestingly, the effect of choice on confidence is exacerbated by experience, and is especially pronounced when litigation risk is high. Our study contributes to the auditing, management, and psychology literatures on information choice, with practical and theoretical implications for judgment and decision making in accounting settings.

Data Availability: Contact the authors.
Psychosocial Factors and Community College Student Success
Authors: Fong Carlton J. , Davis Coreen W. , Kim Yughi , Kim Young Won , Marriott Lauren , Kim SooYeon
Published: June 2016

This meta-analysis examined the relationship between psychosocial factors and community college student success. Informed by college persistence models and motivational theory, we statistically integrated past research on five psychosocial categories (motivation, self-perceptions, attributions, self-regulation, and anxiety), examining their relationship with two student success outcomes: community college persistence (58 samples, N = 23,372) and achievement (186 samples, N = 56,095). Results indicated that psychosocial factors had small but meaningful relationships with community college persistence and achievement. Correlations were larger overall for motivation and self-perceptions, and when outcomes were more proximally related with student engagement. Implications for research and practice are discussed.
Visions of prosperity and conspiracy in Timor-Leste
Authors: Bovensiepen Judith
Published: June 2016

In Timor-Leste, visions of radical societal transformation and future
wealth derived from gold and oil are accompanied by concerns that outsiders
might be conspiring to rob the country of its riches, as well as conjuring up dystopian
scenarios of sinister plots and future mayhem. Examining national narratives
and local accounts, this article argues that visions of prosperity and visions of conspiracy
are two sides of the same coin; both are embedded in an understanding
that power works in invisible ways. In discussing these visions in relation to the
literature on “conspiracy theories” and “cargo cults” (terms that have recently been
imported to the study of Timor-Leste), it explores the critical potential of these
visions. Whereas the labels “conspiracy theory” and “cargo cult” create distinctions
between the “rational” perspective of the West and the “irrationality” of non-Western others, as practices these visions end up collapsing such distinctions by
appropriating the power of the outside.
Somatosensory evoked potential monitoring detection of carotid compression during ACDF surgery in a patient with a vascularly isolated hemisphere
Authors: Legatt Alan D. , Laarakker Avra S. , Nakhla Jonathan P. , Nasser Rani , Altschul David J.
Published: June 2016

The authors report herein a case of anterior cervical discectomy and fusion (ACDF) surgery in which findings on somatosensory evoked potential (SSEP) monitoring led to the correction of carotid artery compression in a patient with a vascularly isolated hemisphere (no significant collateral blood vessels to the carotid artery territory). The amplitude of the cortical SSEP component to left ulnar nerve stimulation progressively decreased in multiple runs, but there were no changes in the cervicomedullary SSEP component to the same stimulus. When the lateral (right-sided) retractor was removed, the cortical SSEP component returned to baseline. The retraction was then intermittently relaxed during the rest of the operation, and the patient suffered no neurological morbidity. Magnetic resonance angiography demonstrated a vascularly isolated right hemisphere.

During anterior cervical spine surgery, carotid artery compression by the retractor can cause hemispheric ischemia and infarction in patients with inadequate collateral circulation. The primary purpose of SSEP monitoring during ACDF surgery is to detect compromise of the dorsal column somatosensory pathways within the cervical spinal cord, but intraoperative SSEP monitoring can also detect hemispheric ischemia. Concurrent recording of cervicomedullary SSEPs can help differentiate cortical SSEP changes due to hemispheric ischemia from those due to compromise of the dorsal column pathways. If there are adverse changes in the cortical SSEPs but no changes in the cervicomedullary SSEPs, the possibility of hemispheric ischemia due to carotid artery compression by the retractor should be considered.
Synchronising Effect of Microwave and Cytosine for the Synthesis of Hybrid Homogenised Nanosized Cerium Oxide and Cerium Oxycarbonate Hydrate Material
Authors: Verma Sarika , Amritphale S.S. , Das Satyabrata
Published: June 2016

A novel microwave irradiation process has been developed for the synthesis of hybrid homogenised nanosized cerium oxide and cerium oxycarbonate hydrate material. Aqueous cerium(IV) sulfate and cytosine were reacted in the presence of microwave irradiation for 10–15 min at a temperature of 40–45 °C. Cytosine acts as a novel multifunctional agent, as a source of alkaline amine, a source of carbon-containing moieties and also as a highly effective capping agent. This enables the synthesis of light yellow hybrid homogenised nanosized advanced material.

The synthesised material was characterised by various complementary techniques, namely X-ray diffraction, Fourier transform infrared spectroscopy, UV-Vis spectroscopy, field emission scanning electron microscopy and energy dispersive X-ray analysis. The characterisation showed that the size of the nano particles were in the range 27–48.3 nm.
Short Stereoselective Synthesis of (+)-Monocerin via a Palladium-Catalysed Intramolecular Alkoxycarbonylation
Authors: Punganuru Surendra R. , Aviraboina Sivaprasad , Srivenugopal Kalkunte S.
Published: June 2016

A concise stereoselective total synthesis of (+)-monocerin has been accomplished using cross metathesis, tandem dihydroxylation-SN2 cyclisation and intramolecular alkoxycarbonylation as key steps. Cross-metathesis of 2-iodo-3,4,5-trimethoxyvinylbenzene and ( R)-hepten-4-ol, followed by tandem dihydroxylation-SN2 cyclisation generated a tri-substituted tetrahydrofuran ring. Finally, the dihydroisocoumarin was obtained by an intramolecular alkoxycarbonylation. In this paper, we have developed an expedient operationally simple Pd(OAc)2/bathocuproine catalysed alkoxycarbonylation under atmospheric pressure of carbon monoxide. The catalytic system developed here can be useful for the synthesis of various dihydroisocoumarins and phthalides.
Effect of Oregano Essential Oil (Origanum vulgare subsp. hirtum) on the Storage Stability and Quality Parameters of Ground Chicken Breast Meat
Authors: Al-Hijazeen Marwan , Lee Eun , Mendonca Aubrey , Ahn Dong
Published: June 2016

A study was conducted to investigate the effect of oregano essential oil on the oxidative stability and color of raw and cooked chicken breast meats. Five treatments, including (1) control (none added); (2) 100 ppm oregano essential oil; (3) 300 ppm oregano essential oil; (4) 400 ppm oregano essential oil; and (5) 5 ppm butylated hydroxyanisole (BHA), were prepared with ground boneless, skinless chicken breast meat and used for both raw and cooked meat studies. For raw meat study, samples were individually packaged in oxygen-permeable bags and stored in a cold room (4 °C) for 7 days. For cooked meat study, the raw meat samples were vacuum-packaged in oxygen-impermeable vacuum bags and then cooked in-bag to an internal temperature of 75 °C. After cooling to room temperature, the cooked meats were repackaged in new oxygen-permeable bags and then stored at 4 °C for 7 days. Both raw and cooked meats were analyzed for lipid and protein oxidation, volatiles, and color at 0, 3, and 7 days of storage. Oregano essential oil significantly reduced (p < 0.05) lipid and protein oxidation, and improved color stability of raw and cooked meat. However, oregano oil at 400 ppm showed the strongest effect for all these parameters. Hexanal was the major aldehyde, which was decreased significantly (p < 0.05) by oregano oil treatment, in cooked meat. Overall, oregano essential oil at 100–400 ppm levels could be a good preservative that can replace the synthetic antioxidant in chicken meat.
An Overview of the Fuzzy Axiomatic Systems and Characterizations Proposed at Ghent University
Authors: Kerre Etienne , D´eer Lynn , Van Gasse Bart
Published: June 2016

During the past 40 years of fuzzy research at the Fuzziness and Uncertainty Modeling research unit of Ghent University several axiomatic systems and characterizations have been introduced. In this paper we highlight some of them. The main purpose of this paper consists of an invitation to continue research on these first attempts to axiomatize important concepts and systems in fuzzy set theory. Currently, these attempts are spread over many journals; with this paper they are now collected in a neat overview. In the literature, many axiom systems have been introduced, but as far as we know the axiomatic system of Huntington concerning a Boolean algebra has been the only one where the axioms have been proven independent. Another line of further research could be with respect to the simplification of these systems, in discovering redundancies between the axioms.
Two-Dimensional Electronics — Prospects and Challenges
Authors: Schwierz Frank
Published: June 2016

For about a decade, 2D (two-dimensional) materials have represented one of the hottest directions in solid-state research.[...]
A Comparison of the Stress Analysis of an Unrestored and Restored Tooth with Amalgam and Composite Resin
Authors: Aykul Halil , Toparlı Mustafa
Published: June 2016

Finite element models were developed for an unrestored tooth and restored tooth. The tooth was considered to be in a restored state with amalgam and composite resin on glass-ionomer as the base material. For this study, an axisymmetric model of a maxillary second premolar that included an alveolar bone was used. A load of 200 N at an angle of 45o to the radial axis was applied on the occlusal margin of the tooth. The tooth was assumed isotropic, homogenous and elastic. The authors using FORTRAN 77 prepared all calculation programs. The distributions of radial axial and shear stresses were plotted with length of radial for some critical points.
Pruning Decision Trees using Rules3 Inductive Learning Algorithm
Authors: Aksoy Mehmet
Published: June 2016

One important disadvantage of decision tree based inductive learning algorithms is that they use some irrelevant values to establish the decision tree. This causes the final rule set to be less general. To overcome with this problem the tree has to be pruned. In this article using the recently developed RULES inductive learning algorithm, pruning of a decision tree is explained. The decision tree is extracted for an example problem using the ID3 algorithm and then is pruned using RULES. The results obtained before and after pruning are compared. This shows that the pruned decision tree is more general.
Heuristic Approach for N-Job, 3-Machine Flow Shop Scheduling Problem Involving Transportation Time, Break Down Time and Weights of Jobs
Authors: Chandramouli A.
Published: June 2016

This paper provides a new simple heuristic algorithm for a ‘3-Machine, n-job’ flow-shop scheduling problem in which jobs are attached with weights to indicate their relative importance and the transportation time and break down intervals of machine are given. A heuristic approach method to find optimal or near optimal sequence minimizing the total weighted mean production flow time for the problem has been discussed.
Free Energies and Specific Heats of the Nematics within Nonextensive Thermostatistics
Authors: Afsar O. , Kayacan O.
Published: June 2016

In this study, the free energies and specific heats of the nematic liquid crystals are studied within Tsallis thermostatistics. In equilibrium, free energy of PAA (para-azoxyanisole) vs the order parameter is plotted, as well as its the specific heat vs temperature. The effect of the nonextensivity is illustrated for some values of the entropic index q.
Natural Frequencies of Beam-Mass Systems in Transverse Motion for Different End Conditions
Authors: Öz H. , Özkaya E.
Published: June 2016

In this study, an Euler-Bernoulli type beam carrying masses at different locations is considered. Natural frequencies for transverse vibrations are investigated for different end conditions. Frequency equations are obtained for two and three mass cases. Analytical and numerical results are compared with each other.
Symmetry Reduction of Unsteady MHD Aligned Second Grade Flow Equations
Authors: Ali Asif , Mehmood Ahmer
Published: June 2016

Exact solutions for the unsteady flow equations of an incompressible MHD aligned second grade fluid are obtained. Translational symmetries are used successively to reduce the governing partial differential equations into ordinary differential equations.
The Decision of Intrauerine Growth Retardation from Ultrasonographic Examinations with Neural Networks
Authors: Gürgen Fikret , Önal Emrah , Varol Füsun
Published: June 2016

Our putpose is to make decision of intrauterine growth retardation (IUGR) through single and multiple ultrasonographic fetal growth assessments using a neural network (NN). This study was undertaken to show if a feedforward NN can learn nominal growth curves of head circumference (HC), abdominal circumference (AC), and HC/AC ratio versus gestational age and can help doctors in diagnosis ofIUGR Weekly (from 1 to 4 weeks) ultrasonographic examinations are taken as input to NN. A feedforward NN is used as a function approximator. Back propagation (BP) algorithm is used to optimize connection weights using samples from nominal curves. It was observed that a NN can improve the accuracy of the decision of IUGR by the multiple weekly examinations which mean monitoring the dynamic process of a change in size over time. It was concluded that the applicability of NNs to determination of IUGR is possible and it is a fruitfui line of inquiry for further work.
Some Renovations in Transient Analysis of Transmission Lines by State-Space Techniques
Authors: Mamiş M. , Köksal Muhammet
Published: June 2016

A method for transient analysis of single phase transmission lines based on state-space technique is presented. Transmission lines are considered as the interconnection of many lumped parameter sections. By this approach state equations are formulated for the system by choosing the capacitor voltages and inductor currents as the state variables. These equations are solved by state space techniques to compute steady-state and transient responses of transmission lines for various source and load connections. A computer program called LPTLAP (Lumped Parameter Transmission Line Transient Analysis Program) has been prepared for both formulation and solution steps.
A New Technique to Process and Recognize Barcodes Using Induction
Authors: Aksoy M. , Bayram M.
Published: June 2016

In this paper, a new technique to recognize and process Barcodes is introduced. The technique employs Inductive Learning. It is suitable to use, for example, in a factory to control the workers, staff, stock etc. In this technique only vertical lines are considered while the spaces in between are ignored. This results faster processing. Each Barcode is considered to represent an item. For each Barcode a rule is extracted from the necessary information using Inductive Learning. So the unnecessary information is eliminated. This causes faster processing time and less amount of memory. In order to use this technique no special hardware is required. Only a PC and a Barcode reader is enough.
The Group of Twist Knots
Authors: Allin Yılmaz , Bozhüyük Mehmet
Published: June 2016

In this paper some interesting invariants of twist knots are calculated. Especially the first homotopy and the first homology groups of all three sheeted branched covering spaces of the three dimensional sphere branched over twist knots are given.
Experimetntal Detection of the Faults in a Gearbox
Authors: A. Ekrekli , R. Güçlü , N. Tahralı
Published: June 2016

Dynamic analysis of gearboxes especially driven at high speeds has always been an area of interest for researchers. It is important to know the dynamic behaviour of a gearbox to operate it more efficiently from the friction and vibration point of views. This is important for the automotive industry. To evaluate the vibration of gearboxes produced by a military factory based in Tuzla, an accelerometer is used together with an amplifier and an A/D converter fitted in the computer. Nonrecursive digital filtering programmed by the authors manifested the contribution of vibration from each part of the gearbox.
Symmetries of Nonlinear Telegraph Equations in Strong Fields
Authors: Haager G. , Baumann G. , Nonnenmacher T.
Published: June 2016

In this article the symmetries of a class of nonlinear telegraph equations are examined. These equations represent a physical model describing electro magnetic shock waves. The main interest is concentrated on potential symmetries but Lie point and non classical symmetries are also calculated. With the aid of these symmetries explicit new solutions are derived or given implicitly by defining equations.
Multichannel Blind Deconvolution Using a Generalized Gaussian Source Model
Authors: Abu-Taleb A. S. , Zayed E. M. E. , El-Sayed W. M. , Badawy A. M. , Mohammed O. A.
Published: June 2016

In this paper, we present an algorithm for the problem of multi-channel blind deconvolution which can adapt to un-known sources with both sub-Gaussian and super-Gaussian probability density distributions using a generalized gaussian source model. We use a state space representation to model the mixer and demixer respectively, and show how the parameters of the demixer can be adapted using a gradient descent algorithm incorporating the natural gradient extension. We also present a learning method for the unknown parameters of the generalized Gaussian source model. The performance of the proposed generalized Gaussian source model on a typical example is compared with those of other algorithm, viz the switching nonlinearity algorithmproposed by Lee et al. [8].
On the Stability of Delay Integro-Differential Equations
Authors: Yeniçerioğlu Ali , Yalçınbaş Salih
Published: June 2016

Some new stability results are given for a delay integro-differential equation. A basis theorem on the behavior of solutions of delay integro-differential equations is established. As a consequence of this theorem, a stability criterion is obtained.
A Review of Rules Family of Algorithms
Authors: Aksoy Mehmet
Published: June 2016

In recent years, there has been a growing amount of research on inductive learning. Out of this research a number of promising algorithms have surfaced. In the paper after a brief description of knowledge acquisition, induction and inductive learning; RULES family of inductive learning algorithms, their strengths as well as weaknesses are explained and discussed. The applications of inductive learning and particularly the applications of RULES family of algorithms are overviewed.
Generalized Statistical Mechanics for Nucleus
Authors: Babacan Halil , Kayacan Ozhan , Atici Ramazan
Published: June 2016

In this study, we derived the grand partition function and some thermodynamical quantities of the nucleus in the high temperature limit by adopting the ideal Fermi gas partition function of generalized Tsallis thermostatistics. The behaviour of number of neutron and internal energy are depicted as a function of temperature. Sensitivity of q entropy index to the number neutron are also analyzed.
An Iterative Method for Solving Linear Fraction Programming (LFP) Problem with Sensitivity Analysis
Authors: Tantawy Said
Published: June 2016

In this paper an iterative method for solving linear fraction programming (LFP) problem is proposed, it will be shown that this method can be used for sensitivity analysis when a scalar parameter is introduced in the objective function coefficients and our task of this sensitivity investigation is to maintain the optimality of the problem under consideration. A simple example is given to illustrate this proposed method.
Design Optimization of Electric Motors by Multiobjective Fuzzy Genetic Algorithms
Authors: Çunkaş Mehmet
Published: June 2016

This paper presents a multiobjective fuzzy genetic algorithm optimization approach to design the submersible induction motor with two objective functions: the full load torque and the manufacturing cost. A multiobjective fuzzy optimization problem is formulated and solved using a genetic algorithm. The optimally designed motor is compared with an industrial motor having the same ratings. The results of optimal design show the reduction in the manufacturing cost, and the improvement in the full load torque of the motor.
Network of Tandem and Bi-Tandem Queueing Process with Reneging and Jockeying
Authors: Chandramouli A.B.
Published: June 2016

The steady state behaviour of a queueing model where two bi-tandem channels are linked in tandem with a common channel has been studied using the concept of reneging and jockeying.
CSLS: Connectionist Symbolic Learning System
Authors: Aksoy Mehmet , Mathkou Hassan
Published: June 2016

This paper presents CSLS, a symbiotic combination of inductive and neural learning. CSLS has two components, an induction algorithm to carry out inductive learning and a multi-layer perceptron (MLP) to implement neural learning. The paper outlines the operation of the components of CSLS and describes how the combined system is designed to utilise the individual strengths of inductive and neural learning to the best advantage. The paper gives the results of evaluating CSLS on the IRIS data and Breast-Cancer-Wisconsin-data classification problems. These clearly demonstrate the main benefit of the symbiotic combination: the combined system performs better than either of its components.
A MATLAB/GUI Based Fault Simulation Tool for Power System Education
Authors: Koç Savas , Aydoğmus Zafer
Published: June 2016

A MATLAB/GUI (Graphical User Interface) based simulation tool has been developed to calculate the short-circuit fault currents in power transmission lines and to use as an educational material for courses on power system analysis. Presented program provides the calculation of three-phase (3LS), single line-to-ground (1LG), line-to-line (2LS), and double line-to-ground (2LG) faults on transmission lines. Symmetrical components of currents and voltages are used for calculations in the program. By means of the program, calculated fault currents and voltages on the fault point of the line have been presented both in per-unit and in real values. Furthermore, this calculated currents and voltages can be observed in GUI screen. In this way, an educational tool has been developed for the students to check the accuracy of their calculations and to observe the variations of waveforms. The purpose of this GUI based tool is to help the student to understand the concept of symmetrical components and short-circuit faults.
A Practical Algorithm for Simulation of Transient Performance of Chopper-Controlled R-L and Dc Drive Loads
Authors: Akbaba Mehmet , Özhan Orhan
Published: June 2016

This paper presents a practical algorithm for obtaining transient response of chopper-controlled active and passive loads. Core algorithm given for simulating transient response of chopper-controlled R-L load is extended to chopper-controlled DC drive, covering both the continuous and discontinuous current modes of operation. Although chopper-controlled loads are taken as case studies, with a little effort the core algorithm can be readily extended to handle the transient response of the other system which manifests periodic discontinuous forcing functions of different types. Transient current and speed responses of chopper-controlled DC drive, which are obtained from application of the proposed algorithm are compared with their counterparts obtained from detailed numerical solution of the state-space model of the drive using fourthorder Runge-Kutta method, and the advantages of proposed algorithm are discussed.
Effect of Material Properties on Vibrations of Nonsymmetrical Axially Loaded Thin-Walled Euler-Bernoulli Beams
Authors: Altıntas Gökhan
Published: June 2016

This paper focuses on effect of material properties on free vibration characteristics of nonsymmetrical axially loaded thin-walled Euler-Bernoulli beams. Many scientists studied the vibration of coupled systems but adequate consideration has not been given to detailed and parametric studies on the effect of material properties on vibration properties. The current findings of this study show that there have been quite different effects of material properties on the systems without symmetry axis than on the systems with symmetry axis. Material properties are properties affecting the free vibration behavior. Moreover, effect of axial load on natural frequencies was also investigated in this study. Convergence work revealed that the current mathematical model simulated the problem with excellent accuracy.
Comparison and Coupling of Polynomials for Flierl-Petviashivili Equation
Authors: Mohyud-Din Syed , Noor Muhammad , Noor Khalida
Published: June 2016

This paper outlines a comparison of the couplings of He’s and Adomian’s polynomials with correction functional of variational iteration method (VIM) to investigate a solution of Flierl-Petviashivili (FP) equation which plays a very important role in mathematical physics, engineering and applied sciences. These elegant couplings give rise to two modified versions of VIM which are very efficient in solving initial and boundary value problems of diversified nature. Moreover, we also introduces a new transformation which is required for the conversion of the Flierl-Petviashivili equation to a first order initial value problem and a reliable framework designed to overcome the difficulty of the singular point at x = 0. The proposed modified versions are applied to the reformulated first order initial value problem which gives the solution in terms of transformed variable. The desired series of solution is obtained by making use of the inverse transformation. It is observed that the modification based on He’s polynomials is much easier to implement and is more user friendly.
Legendre Series Solutions of Fredholm Integral Equations
Authors: Yalçınbas Salih , Aynigül Müge , Akkaya Tuğçe
Published: June 2016

A matrix method for approximately solving linear Fredholm integral equations of the second kind is presented. The solution involves a truncated Legendre series approximation. The method is based on first taking the truncated Legendre series expansions of the functions in equation and then substituting their matrix forms into the equation. Thereby the equation reduces to a matrix equation, which corresponds to a linear system of algebraic equations with unknown Legendre coefficients. In addition, some equations considered by other authors are solved in terms of Legendre polynomials and the results are compared.
Application of Image Processing in Unsteady Flows to Investigate Bed Load Transport
Authors: Bombar Gökçen , Güney M. , Altınakar Mustafa
Published: June 2016

Image processing is a promising technique to investigate bed load characteristics and its movement which has been applied in steady flow conditions for the last few decades. In this study, it is aimed to perform experiments in unsteady flows through generating a hydrograph to apply this technique and calculate the bed load transport. The sediment motion is recorded by a video recorder. The video records are analyzed by image processing techniques to determine the number and area of active grains moving at any instant as well as the average velocity of the grains. A bed load transport formula is introduced particularly used by the digital video analysis in which the time variation of the bed load due to the hydrograph could be precisely determined. It is revealed that the bed load determined at two sections of the flume is in accord and the bed load – time curve has a fluctuating character.
On the Redefinition of the Variational and `Partial' Variational Conservation Laws in a Class of Nonlinear PDEs with Mixed Derivatives
Authors: Narain R. , Kara A.
Published: June 2016

The construction of conserved vectors using Noether’s and partial Noether’s theorems are carried out for high order PDEs with mixed derivatives. The resultant conserved flows display some interesting ‘divergence properties’ owing to the existence of the mixed derivatives. These are spelled out for various equations from mathematical physics.
Study on the Stability of Steiner Tree Structure of Explosion-Proof Textiles
Authors: Wu Ling-Ye , He Ji-Huan
Published: June 2016

The stability of Steiner tree structure of explosion-proof textiles by studying on the tearing strength. We conclude that the Steiner tree structure has good stability.
Hard Fling Objector Contact with Surface of Fluid as a Ricochet
Authors: Xiao Jian-Hua
Published: June 2016

For a hard flying objector contacts with the surface of fluid, there exists a critical contact angle between the flying direction and the surface direction. When the actual contact angle is less than the critical angle, the flying objector will get additional moment in flying direction and be rebounded up to tens grades. This critical angle is determined by the flying velocity and elastic constants of fluid. These phenomena are named as ricochet which essentially is due to the dynamic pressure of the fluid acting upwards on the flying objector to overcome its gravity force. Although the skipping of a flat stone on water surface is well known practices, the essential theoretic interpretation is not suitably formulated. In this research, it is shown that the fluid has two typical deformation modes: one is orthogonal rotational deformation (which is related with conventional contact), another is orthogonal rotation with intrinsic volume expansion. For the first kind of deformation, the dynamic pressure is inward direction, so the objector will sink into the fluid. However, for the second of deformation, the dynamic pressure is upward direction, so the flying objector will be raised up. It is this mechanism that produces the ricochet phenomenon. In this paper, the dynamic stress is determined by the fluid deformation. Then the contact condition equations are used to establish the related phenomenon. Based on these formulations, the critical angle is expressed by the flying velocity, mass and the fluid viscosity parameters. The related mechanic equations are formulated also. These results may promote the researches on the dynamic contact problem with bifurcation, such as ricochet and/or emerging.
Symbolic Computation of Recursion Operators for Nonlinear Differential-Difference Equations
Authors: Göktaş Ünal , Hereman Willy
Published: June 2016

An algorithm for the symbolic computation of recursion operators for systems of nonlinear differential-difference equations (DDEs) is presented. Recursion operators allow one to generate an infinite sequence of generalized symmetries. The existence of a recursion operator therefore guarantees the complete integrability of the DDE. The algorithm is based in part on the concept of dilation invariance and uses our earlier algorithms for the symbolic computation of conservation laws and generalized symmetries. The algorithm has been applied to a number of well-known DDEs, including the Kacvan Moerbeke (Volterra), Toda, and Ablowitz-Ladik lattices, for which recursion operators are shown. The algorithm has been implemented in Mathematica, a leading computer algebra system. The package DDERecursionOperator.m is briefly discussed.
Performance of an Ensemble Clustering Algorithm on Biological Data Sets
Authors: Pirim Harun , Gautam Dilip , Bhowmik Tanmay , Perkins Andy , Ekşioglu Burak , Alkan Ahmet
Published: June 2016

Ensemble clustering is a promising approach that combines the results of multiple clustering algorithms to obtain a consensus partition by merging different partitions based upon well-defined rules. In this study, we use an ensemble clustering approach for merging the results of five different clustering algorithms that are sometimes used in bioinformatics applications. The ensemble clustering result is tested on microarray data sets and compared with the results of the individual algorithms. An external cluster validation index, adjusted rand index (C-rand), and two internal cluster validation indices; silhouette, and modularity are used for comparison purposes.
Three Dimensional Cutting Problem: An Integer Programming Approach
Authors: Kahraman Bayram
Published: June 2016

Cutting problem is one of the major problems faced in marble factories. Huge marble blocks coming from marble quarries are first cut into planes according to their depths. Then these planes are sized according to the length and width of the demanded products. In this study, cutting problem of a marble factory is handled. The two problems, which are cutting marble blocks into planes and sizing these planes, are integrated together. An integer programming model is built for the integrated problem. The objective of the model is to minimize total waste of marble while finding the cutting design of the marble block and marble planes. The model is used to solve the cutting problem of a real life marble processing factory. It is shown that the mathematical model decreases wasted amount of marble considerably compared to the industry average.
Calculation of the Mechanical Properties of FeB Layer's by Finite Element Method
Authors: Culha Osman , Toparli Mustafa , Aksoy Tevfik , Akdag Mustafa
Published: June 2016

Surface treatments of engineering materials are important for serviceable engineering components. One of the thermo-chemical surface treatments of steel based materials is the boriding process. In this study, low alloy steel substrates were borided by pack boriding process at 900 °C. Experimental indentation tests were conducted on Dynamic Ultra-micro Hardness test machine, under applied peak loads of 800 mN, 1000 mN, 1200 mN and 1400 mN. To get the mechanical properties of FeB layers, the resulting load–unload test data of the samples obtained from the experimental indentation tests were analyzed and curve-fitted in Kick’s and Meyer’s law for the loading and the unloading part of the load-unload curve respectively. Then, a set of analytical functions that take the pile-up and sink-in effects into account during instrumented sharp indentation were solved using numerical methods. These analytical functions were defined within an identified representative plastic strain, εr, for the Vickers indenter geometry as a strain level that allows for the description of the indentation loading response independent of strain hardening exponent, n. The mechanical characterization of samples, finite element modeling was applied to simulate the mechanical response of FeB layer on low alloy steel substrate by using ABAQUS software package program.
Numerical Approach of High-Order Linear Delay Difference Equations with Variable Coefficients in Terms of Laguerre Polynomials
Authors: Gürbüz Burcu , Gülsu Mustafa , Sezer Mehmet
Published: June 2016

This paper presents a numerical method for the approximate solution of mthorder linear delay difference equations with variable coefficients under the mixed conditions in terms of Laguerre polynomials. The aim of this article is to present an efficient numerical procedure for solving mth-order linear delay difference equations with variable coefficients. Our method depends mainly on a Laguerre series expansion approach. This method transforms linear delay difference equations and the given conditions into matrix equation which corresponds to a system of linear algebraic equation. The reliability and efficiency of the proposed scheme are demonstrated by some numerical experiments and performed on the computer algebraic system Maple.
Earth Fill Modelling with Finite Element Method
Authors: Kavaka Aydın , Okaya Fuat , Doğanb Serdar , Mutmana Utkan
Published: June 2016

The objective of this study was to examine load-deformation characteristics at different fill layers of a high fill and to determine typical modeling parameters by using plate loading tests in a real construction site. The average value of the modulus of elasticity Eplaxis was found to be 53 MN/m2 and Poisson’s ratio was found to be 0.2 for the dense sand soil of the construction site. With proper compaction, load-deformation characteristics were found to be almost identical in different layers of the fill and very close to that of the natural soil.
Determination of Reducing Coefficient Values of Semi-Rigid Frames Using Artificial Neural Network
Authors: Şeker Soner , Uğur Öztürk Ali , Kozanoğlu Celal
Published: June 2016

Lateral rigidity is a great issue in the view of structural analysis in civil engineering applications such as production of buildings, bridges, dams and roads. Furthermore, the connection properties have a remarkable role on the lateral rigidity and the tendency of structures under service loads. In fact, there aren’t any structures with perfectly rigid connections between beams and columns. Therefore, all connections performed by construction process can be defined as semi-rigid as, especially connections in steel structures. The effect of connection type on the lateral rigidity values of structures can be determined by reducing coefficients decreasing lateral rigidity with a certain extent. In the scope of this study, connection flexibility is modeled by linear elastic rotational springs for semi-rigid frames. The reducing coefficients are determined by using a computer program. Results are compared to the values predicted by artificial neural network (ANN) analyses. A strong relationship was established between calculated and predicted values.