bluuebunny/crossref_metadata_2025 huggingface dataset:
ON THE HOTELLING’S T, MCUSUM AND MEWMA CONTROL CHARTS' PERFORMANCE WITH DIFFERENT VARISBILITY SOURCES: A SIMULATION STUDY
Authors: Moraes D. A. O. , Oliveira F. L. P. , Duczmal L. H.
Published: December 2015

This work is a simulation study to investigate the sensitivity of multivariate control charts for monitoring mean vectors in a bivariate Gaussian process with individual observations. The multivariate cumulative sum (MCUSUM), the multivariate exponentially weighted moving average (MEWMA) and Hotelling’s T charts are selected for analysis due to their common dependency on the noncentrality parameter. The chart performance is evaluated through the average run length (ARL) or the average time to signal. The impact of utilising in-control limits computed from known parameters or Phase I sample estimates is considered for mean vector shifts. Although designed to monitor mean vectors, the sensibility of the control charts is additionally analysed through different variability sources, including the mixing effect of mean vector shifts with increasing variances or positive autocorrelation in the out-of-control process.
CAPABILITY INDICES FOR CONTROL CHARTS BASED ON REGRESSION MODELS
Authors: Souza Fernanda Siqueira , Pedrini Danilo Cuzzuol , Ten Caten Carla Schwengber
Published: December 2015

Process capability analysis is extremely important for optimization and quality improvement. It verifies whether the process under analysis is capable of producing items within engineering and customers’ specifications. The use of capability indices when assumptions are not satisfied leads to erroneous conclusions, compromising the study and analysis of the process, jeopardizing the fulfillment of requirements from management or external customers. Aiming at filling a gap identified in the literature, the main contributions of this work are: (i) proposition of capability indices for processes monitored through control charts based on regression models, for symmetric and asymmetric specifications; and (ii) comparison of the proposed indices with traditional capability indices through a simulated process.
Free time management scale: Validity and reliability analysis
Boş zaman yönetimi ölçeği: Geçerlik- güvenirlik çalışması
Authors: Akgül Beyza Merve , Karaküçük Suat
Published: December 2015

The aim of this research is to adapt the Free time management scale (Wei-Ching Wang,  Chin-Hsung Kao, Tzung-Cheng Huan, Chung-Chi Wu, 2011) to Turkish and to examine its psychometric properties. The research was conducted on 447 university students from various faculties of Gazi University, Turkey. First of all, lingual equivalence of the scale was applied.  Explanatory (EFA) and confirmatory factor analysis (CFA) were used for validity analysis of the scale. In the result of the EFA, Being in English originally, this scale consisted of 15 items and 4 dimensions. While the number of the items were exactly the same in the ‘leisure attitude’ and ‘scheduling’, ‘goal setting and technique’ was 6 items and ‘evaluating’ was 3 items. Confirmatory factor analysis (CFA) was applied to test the four factor construct of the scale. Internal consistency coefficient of the whole scale was found to be .83 and test retest reliability of the scale was found to be .86. To this end, According to the validity and reliability analyses, it was found that this scale is a reliable and valid scale to be used to determine free time management  of university students in Turkey.

 

Özet

Bu çalışmanın amacı, Wei-Ching Wang,  Chin-Hsung Kao, Tzung-Cheng Huan, Chung-Chi Wu isimli kişiler (2011) tarafından geliştirilen Boş Zaman Yönetimi Ölçeğini Türkçeye uyarlamak ve ölçeğin geçerlik ve güvenirlik analizlerini yapmaktır. Araştırmaya Gazi Üniversitesi’nin çeşitli bölümlerinde öğrenim gören 447 üniversite öğrencisi katılmıştır. Öncelikle ölçeğin dilsel eşdeğerliği incelenmiş ve dilsel eşdeğerliğe sahip olduğu görüldükten sonra geçerlik ve güvenirlik analizleri yapılmıştır. Ölçeğin geçerlik çalışmasına, açımlayıcı (AFA) ve doğrulayıcı faktör analizleri (DFA) kullanılmıştır. AFA sonucunda, , 15 madde ve 4 alt boyuttan oluşan bir ölçme aracı elde edilmiş ve alt boyutlarda yer alan maddelerin ‘boş zaman tutumu’ ve ’programlama’ alt boyutlarındaki maddelerin orijinal formdaki maddelerle birebir örtüştüğü gözlenirken, ‘amaç belirleme ve yöntem’ alt boyutunda 6 madde, ‘değerlendirme’ alt boyutunda ise 3 madde gözlemlenmiştir. Yapılan doğrulayıcı faktör analizinde ölçeğin orijinal formla uyumlu olduğu görülmüştür. Ölçeğin Cronbach Alpha değeri .83 ve test-tekrar test güvenirliği ise .86 bulunmuştur. Alt boyutlar için ise iç tutarlık katsayıları .71-.81 arasında değişmektedir. Bu sonuçlara göre ölçeğin geçerli ve güvenilir bir ölçme aracı olduğu söylenebilir.
Effectiveness of the argumentation method: A meta-analysis
Authors: Çömek Arif , Sarıçayır Hakan , Erdoğan Yavuz
Published: December 2015

In this age of rapidly developing science and technology and with all the ease of access to information regardless of time and location, it is an indispensable component of every country’s educational policy to educate individuals who can think, defend their ideas and make innovations. The purpose of this research is to determine the effect of the argumentation method on the students’ academic achievement. To achieve this purposes, Meta-analysis, also known as the analysis of other analyses, is employed in this study. All the experimental studies in Turkey have been reviewed and examined by means of national and international electronic database searching for this research, and 25 of them have been found to meet our criteria so that we could examine them through meta-analysis. As a result of these analyses, calculated effect size is found to be large. Consequently, the argumentation method has been determined to have a significantly positive effect on the academic achievement (ES=0,997; p<0,05). Considering the population of Turkey, this result indicates that the argumentation method proves itself to be more effective on students' academic achievement than the traditional education.
Compilación teórica: emprendimientos en la República Dominicana
Authors: Acosta Guzmán José Alberto Alberto
Published: December 2015

Este artículo presenta una revisión bibliográfica  a las investigaciones realizados sobre el tema del emprendimiento en la República Dominicana y el mundo. La revisión realizada pone de relieve el hecho que, aunque es un tema que no ha sido  muy investigado en la República Dominicana, existe un interés  marcado por  entender y comprender los factores que condicionan, influyen y determinan los emprendimientos por parte de los dominicanos,  de forma específica  en lo relacionado con la creación de las microempresa  empresas.Además, se trataran temas vinculados a las características de las Empresas de las persona emprendedoras,   los principales indicadores de las microempresas se expondrán, dado que el desempeño de las microempresas está asociado a un conjunto de factores relacionados con el tamaño de la empresa y el nivel de organización que exhibe, el sector donde se ubica y las características de sus propietarios.http://dx.doi.org/10.15304/rips.14.2.2451
Dominación y reproducción de las élites. Lectura sociológica del proceso de estructuración de las minorías selectas en el elitismo clásico
Authors: Osorio Rauld Nelson Alejandro
Published: December 2015

Es posible constatar que actualmente en el campo de las ciencias sociales existe un predominio significativo de los estudios empíricos sobre las élites políticas, y al mismo tiempo, una escasa problematización teórica en el uso de las teorías elitistas para el estudio de las minorías selectas. En tal sentido, en este artículo se analizan las dimensiones sociológicas de la agencia y estructura en la teoría de las élites de Gaetano Mosca, Vilfredo Pareto y Robert Michels, con el fin de actualizar dichos marcos interpretativos desde una mirada sociológica, lo que permitirá a los investigadores producir conocimiento crítico para dar cuenta de la reproducción de las élites y de la división entre dominantes y dominados.http://dx.doi.org/10.15304/rips.14.2.2469
Structure of the Fundamental Solution of Cauchy Problem for Kolmogorov Systems of Second-Order
Authors: Burtnyak I. , Malytska H.
Published: December 2015

We study a structure of the fundamental solution of the Cauchy problemfor a class of ultra parabolic equations with a finite number of groups of variables withdegenerated parabolicity.
The Fourth Order Mixed Periodic Recurrence Fractions
Authors: Semenchuk A. , Zatorsky R.
Published: December 2015

Offered economical algorithm for calculation of rational shortenings of thefourth-order mixed periodic recurrence fraction
Institutional effects on economic performance in post-socialist transition: A dynamic panel analysis
Authors: Efendic Adnan , Pugh Geoff
Published: December 2015

This article uses dynamic panel analysis to investigate the relationship between institutional improvement and economic performance in 29 transition countries. The contribution of this paper is two-fold. First, we find that per capita GDP is determined by the entire history of institutional reform under transition and that, conditional on this history, per capita GDP adjusts to recent institutional changes. Moreover, we find that the time-horizon over which we measure institutional change matters, with five-year changes showing the clearest effects on current levels of per capita GDP. Secondly, we address the pronounced methodological heterogeneity of this literature. To compensate for incomplete theoretical guidance from the institutional literature, we draw upon an institutional meta-regression analysis to inform our model specification. Our analysis covers the period 1992–2007.
Bear market periods during the 2007–2009 financial crisis: Direct evidence from the Visegrad countries
Authors: Olbryś Joanna , Majewska Elżbieta
Published: December 2015

The main goal of this paper is a quantitative identification of bear market periods during the 2007–2009 global financial crisis in the case of the Visegrad Group stock markets. We analyse four countries, namely Poland, the Czech Republic, Hungary, and Slovakia and, for comparison, the US stock market. The sample period begins on May1, 2004, and ends on April 30, 2013, i.e. it includes the 2007 US subprime crisis. We use the statistical method of dividing market states into bullish and bearish markets. Our results reveal October 2007–February 2009 as the common downmarket period of the recent global financial crisis, except for Slovakia. It is instructive to formally identify crises, as it enables sensitivity analyses of various relationships and linkages among international stock markets using econometric and statistical tools, with respect to the pre-, post- and crisis periods. Moreover, we investigate the effect of increasing cross-market correlations in the crisis compared to the pre-crisis period, applying both standard contemporaneous correlations and volatility-adjusted correlation coefficients. The results confirm that accommodating heteroskedasticity is critical for detecting contagion across economies. A number of studies document that crossmarket correlations vary over time, thereby making the benefits of international portfolio choice and diversification questionable.
Macro- and microeconomic risks of student loans in an international context
Authors: Vona Máté
Published: December 2015

The risk of individual investment in higher education is not a well-researched topic compared to the rate of return to education. In many countries tuition fees are low, but there is a possibility to borrow for investment in education. This can lead to irresponsible investment behaviour. The paper will show that the student loan market is too small to cause a macroeconomic crisis, but that it is a market with many stakeholders and irresponsible behaviour should not be encouraged. With the examination of a Hungarian sample, it can be concluded that in the context of higher education, signs of rational investment behaviour can be found. The risks of post-secondary studies are not yet fully understood and measured, and for this reason further research is suggested.
Polymyalgia rheumatica update, 2015
Authors: Schmidt Zsuzsa , Poór Gyula
Published: December 2015

Polymyalgia rheumatica is an inflammatory musculoskeletal disorder of people aged 50 years or over, characterised by pain, aching and morning stiffness in the shoulder girdle and often hip girdle and neck. Marked systemic inflammation and rapid response to corticosteroid therapy are characteristic features. Giant cell arteritis is a well-known association of polymyalgia rheumatica. Recent clinical evidence and scientific results in the field have provided new challenges for rheumatologists. Besides the aspecific – although characteristic – proximal syndrome, less well recognizable and more variable distal musculoskeletal manifestations were observed. Magnetic resonance and ultrasound studies showed mild, remitting and non-erosive synovitis, with dominating inflammation of the extraarticular synovial structures. As no pathognostic sign is known, the diagnosis of polymyalgia rheumatica is based on its differential diagnosis, differentiation from the polymyalgia mimics; particularly from elderly onset inflammatory arthritides, such as elderly onset rheumatoid arthritis and late onset seronegative spondylarthritis. In 2012 the international polymyalgia rheumatica work group under the guidance of the American College of Rheumatology and European League Against Rheumatism elaborated new classification criteria, the scoring algorythm of which is based on clinical symptoms, with ultrasonography increasing the specificity. Corticosteroids remain the cornerstone of the therapy of polymyalgia rheumatica. No effective steroid-sparing drug has been found to date. Corticosteroids are generally needed for 1–1.5 years, though some patients have a chronic-relapsing course and require corticosteroids for several years. Well known corticosteroid-related side effects (diabetes, hypertension, hyperlipidaemia and osteoporosis) cause significant morbidity and economic burden on the society. Novel therapeautic approaches are on trial. Early recognition of the disease, early start of corticosteroids and a well-defined course, prevention and management of side effects are everyday tasks for rheumatologists and family doctors. Knowledge of polymyalgia rheumatica is essential for all medical specialties. Orv. Hetil., 2016, 157(1), 2–12.
THE USE OF THE EXPERIMENT PLANNING METHOD TO EVALUATE THE ACCURACY OF FLEXIBLE UNITS IDENTIFICATION
Authors: Yehorov O. Y.
Published: December 2015

Purpose. The identification of rolling stock on the railroads is an integral part of many automation systems as trains in general and cars separately. Various information management systems at sorting yards require the operational information about the object while performing the manufacturing operations. The improvement of the determination accuracy of different parameters characterizing the rolling stock, leads to the immediate quality progress in the traffic volumes management. The aim of the paper is to develop a method to estimate the errors of determination the interaxle distance of the flexible units in the control section using the point path-control transducer for future identification of cars and locomotives. Methodology. To achieve this goal the simulation method and experiment planning were used. The simulation model allowing determining the time intervals between the collisions of wheelset of movable units in point path-control transducer on the control section with variable characteristics of identification devices was developed. The values of the time intervals obtained with using the simulation mode were applied in the method of experiment planning to the final target. Findings. The calculated analytical values of the errors of the interaxle distances do not have the significant differences from values obtained using the simulation model. It makes possible to use the received functional dependence to estimate the possible errors in the identification of rolling stock. The results of this work can be used to identify separate flexible units, and trains in general. Originality. The functional dependence of the error of the interaxle distance error from the fixing point of the wheel path-control transducer, the distance between the sensors and the measured distance was derived using a previously conducted research of the factors influencing the error in determining the interaxle distance of the movable units, and developed simulation model to calculate the interaxle distance. Practical value. This functional dependence allows solving the following tasks: to calculate the maximum possible error of determining the interaxle distance of the movable units at known parameters of control section and calculation of parameters of the control section, when the possible acceptable error of determining the interaxle distance of the flexible units is known.
ENERGY EFFICIENCY OF DIESEL LOCOMOTIVE HYDRAULIC TRANSMISSION TESTS AT LOCOMOTIVE REPAIR PLANT
Authors: Bodnar B. E. , Kapitsa M. I. , Ochkasov O. B. , Korenyuk R. O.
Published: December 2015

Purpose. In difficult economic conditions, cost reduction of electricity consumption for the needs of production is an urgent task for the country’s industrial enterprises. Technical specifications of enterprises, which repair diesel locomotive hydraulic transmission, recommend conducting a certain amount of evaluation and regulatory tests to monitor their condition after repair. Experience shows that a significant portion of hydraulic transmission defects is revealed by bench tests. The advantages of bench tests include the ability to detect defects after repair, ease of maintenance of the hydraulic transmission and relatively low labour intensity for eliminating defects. The quality of these tests results in the transmission resource and its efficiency. Improvement of the technology of plant post-repairs hydraulic tests in order to reduce electricity consumption while testing. Methodology. The possible options for hydraulic transmission test bench improvement were analysed. There was proposed an energy efficiency method for diesel locomotive hydraulic transmission testing in locomotive repair plant environment. This is achieved by installing additional drive motor which receives power from the load generator. Findings. Based on the conducted analysis the necessity of improving the plant stand testing of hydraulic transmission was proved. The variants of the stand modernization were examined. The test stand modernization analysis was conducted. Originality. The possibility of using electric power load generator to power the stand electric drive motor or the additional drive motor was theoretically substantiated. Practical value. A variant of hydraulic transmission test stand based on the mutual load method was proposed. Using this method increases the hydraulic transmission load range and power consumption by stand remains unchanged. The additional drive motor will increase the speed of the input shaft that in its turn wil allow testing in closer to real conditions as a result of increased load on the hydraulic transmission. Increased load on the hydraulic transmission will help to detect possible defects and hence will improve the quality of transmission repairs.
COMPLEX SIMULATION MODEL OF TRAIN BREAKING-UP PROCESS AT THE HUMPS
Authors: Demchenko E. B.
Published: December 2015

Purpose. One of the priorities of station sorting complex functioning improvement is the breaking-up process energy consumptions reduction, namely: fuel consumption for train pushing and electric energy consumption for cut braking. In this regard, an effective solution of the problem of energy consumption reduction at breaking-up subsystem requires a comprehensive handling of train pushing and cut rolling down processes. At the same time, the analysis showed that the current task of pushing process improvement and cut rolling down effectiveness increase are solved separately. To solve this problem it is necessary to develop the complex simulation model of train breaking up process at humps. Methodology. Pushing process simulation was done based on adapted under the shunting conditions traction calculations. In addition, the features of shunting locomotives work at the humps were taken into account. In order to realize the current pushing mode the special algorithm of hump locomotive controlling, which along with the safety shunting operation requirements takes into account behavioral factors associated with engineer control actions was applied. This algorithm provides train smooth acceleration and further movement with speed, which is close to the set speed. Hump locomotive fuel consumptions were determined based on the amount of mechanical work performed by locomotive traction. Findings. The simulation model of train pushing process was developed and combined with existing cut rolling down model. Cut initial velocity is determined during simulation process. The obtained initial velocity is used for further cut rolling process modeling. In addition, the modeling resulted in sufficiently accurate determination of the fuel rates consumed for train breaking-up. Originality. The simulation model of train breaking-up process at the humps, which in contrast to the existing models allows reproducing complexly all the elements of this process in detail and evaluate accurately its quality, was improved by the author. Practical value. The developed model can help to determine a rational processing mode of sorting complex. For this purpose, it is appropriate to include the model into the decision support system of dispatching station staff.
FEATURES OF THE DEFORMATION WORK OF THE RAILWAY TRACK
Authors: Bondarenko I. O.
Published: December 2015

Purpose. The purpose of study is to identify the features of the railway track work deformation by establishing the boundaries of the track sustainability depending on the design and condition of systems of the upper and lower track structure, plan of a line for the possibility of forming a regulatory framework for reliability and functional safety of railway track in Ukraine. Methodology. The complete method of S. P. Pershyn of determination the critical values of compressive strength was used for the achievement of the purpose. Findings. The author found that the ratio of the minimum values of compressive force under the certain bending deformation can be used as evaluation conditions of the track deformation resistance and basis for formation the base of reliability and functional safety of the Ukrainian railway track. Originality. The theoretical position for the consideration the deformation stability of the upper and lower track structure were proposed. It will allow studying the process of deformation work of the system, which changes its state during a particular operating time. Thus, it allows determining the parameters of the functional reliability of the train as a part of security pass of the rolling stock on the track, accounting its technical condition. Practical value. Usually for the safe passage of rolling stock the parameters of the oscillations of the «vehicle – track» are determined. These parameters are normalized with the instructions on design and maintenance of the railway track. Changes in the regulatory framework of rail transport in recent years provide the observance of its functional safety that are not included in the existing regulations of the railway track. Therefore it is necessary the issue of effect impact assessment of the rolling stock on the track to consider as a dynamic process, limit states criteria of which are determined on the basis of existing norms, correlated with the reliability states, and to develop criteria for security throughout the life cycle on their basis. At considering the dynamic process of track oscillation and rolling stock must take into account the deformation resistance of the track. This issue was addressed only in terms of changes in temperature deformations. This study provides a basis at which it is possible to take into account the stiffness of deformation for the ability of regulatory framework formation for reliability and functional safety of railway track in Ukraine.
EXPERIMENTAL INVESTIGATIONS OF HORIZONTAL LATERAL STIFFNESS OF RAILS UNDER DIFFERENT DESIGNS OF RAIL FASTENERS
Authors: Velinets V. P.
Published: December 2015

Purpose. Calculation of a railway track on the strength is one of the sections of the overall complex research problems of interaction track and rolling stock. This paper describes the experimental study of horizontal transverse stiffness of railway rails with various strands of rail fasteners. Materials of this article should be relevant and will make it possible to calculate the strength of railway track using the correct and corrected performance of horizontal transverse stiffness of rail threads. Methodology. Determination of horizontal transverse rigidity of rail yarns with different designs of rail fasteners was conducted by measuring the quantities of transverse displacement of rails calculation points – namely the head and sole. For research the specialist equipment was created, made up of lineside jack DC-20, equipped with a hydraulic pressure gauge to measure pressure and rigid rod for horizontal rail stop in the thread, the opposite of the jack. Lateral movement of the head and sole of the track were recorded, and measured with indicators of clock type within a few hundredths of a millimeter. The horizontal lateral load on the rail jack was created by the injection pressure in the cylinder which was fixed with manometer into the jack. Load of rails was conducted over 2 tons of degrees ranging from 0 to 8 tons. To obtain reliable measurement results of lateral movement of the head and the base rails, its movement was conducted for each type fasteners not less than in 3 sections. Measurements were carried out without the creation of vertical load. Findings. With the developed method was found transverse displacement magnitude of rails calculation points at different designs of rail fasteners. Originality. The experimental studies were first found the mentioned horizontal transverse stiffness of rail threads in the head and sole of modern designs for different rail fasteners. Practical value. The values of horizontal transverse stiffness of rail threads in the head and sole of modern designs for different rail fasteners that were found by the author make it possible to calculate the strength of railway track using correct and corrected values of these characteristics.
RECENT RESEARCHES OF THE LATERAL FLEXIBILITY OF RAIL THREAD UNDER COMBINED ACTION OF VERTICAL AND HORIZONTAL FORCES
Authors: Danilenko E. I.
Published: December 2015

Purpose. Studying the characteristics of spatial flexibility of rail thread is necessary for solving problems in calculation rails durability in full formulation, namely under combined action of vertical and horizontal forces and torque moment on the track. Characteristics of torsional lateral horizontal elasticity and rail thread are the least researched under combined action of vertical and horizontal forces on the track. In the current method of engineering calculation the track durability the impact on track horizontal forces are counted only indirectly through the use of so-called «factors of influence», which are not connected with calculations. That is, the current method cannot let obtain the exact strains and stresses of rails under combined action on the track vertical and horizontal forces. The article purpose is solving the problem of calculation the real lateral modulus of railway track under combined action of vertical and horizontal forces. Methodology. In this paper the complex method of solving the problem was used: with the help of experimental method characteristics of rail horizontal transverse stiffness when exposed only horizontal force were measured; theoretical researches were used for calculation the actual lateral elastic modulus of track Uy(T) (when combined action of vertical and horizontal forces on track takes place). Findings. New data characteristics of lateral flexibility of rail thread were obtained for modern designs of the railway track on concrete and wooden sleepers with rails R65, UIC60, R50, R43 and with fastenings КБ, КПП-5, КПП-1, Д0. Originality. For the first time in domestic researches, experimental and theoretical solution of characteristics of lateral flexibility of rail threads under combined action of vertical and horizontal wheel loads with positioning the functional dependence of variable transverse modulus of the rail elasticity Uy(T) from the ratio of co-operating vertical and horizontal dynamic forces Pdyn / Нdyn . Practical value. The results allow calculating the strength of rail threads considering combined action of vertical and horizontal forces on the track for concrete and wooden sleepers with significantly higher accuracy than with the current method of calculation the track for strength.
PROBLEM OF THE DEFINITION THE «RELIABILITY» TERM. METHODOLOGY OF CONSTRUCTION AND STUDY THE RELIABILITY OF FREIGHT CARS
Authors: Myamlin S. V. , Muradian L. A. , Baranovsky D. M.
Published: December 2015

Purpose. Scientific paper is aimed at disclosing the existing problem of the «reliability» definition and provides a reasoned definition of the term. The study assumes the development of a complex that includes the methodology and appropriate terminology that will be true. Methodology. Currently there is reliability theory in the special case of the probabilistic and statistical theory, which is used to determine or predict the occurrence of object failures. Within the existing theories the term «reliability» is formulated, the parameters related to it are described. Findings. On the basis of the conducted analysis of the research within the existing theory of reliability and personal considerations of the authors, they formulated a definition of the term «reliability». The methodology and study of the object reliability on the example of a freight car was proposed. Originality. The authors proposed a new definition of the «reliability» term. Namely: reliability is an assessment of the ability of an object to maintain the original property within the established limits and temporary space, in the conditions of storage and transportation, as well as to perform the required functions in predetermined modes of operation with maintenance and repair facility. The reliability parameters include: reliability, durability, maintainability and safety that characterize the object. Also a methodology for developing and study the reliability of a freight car was developed, which comprises: 1) design, technological and operational reliability; 2) scientific experiment, including the modeling of the freight car in different conditions and operating modes; 3) the reliability theory is presented as combined or modified, covering the mathematical and physical foundations; 4) Bayesian statistics that describe the different states of a freight car with a breakdown of its basic components and with the appropriate probability for each component to describe the overall reliability. Practical value. The results of the study allow to provide a full and accurate picture with a corresponding failure of a freight car and to improve approaches to the construction and study of the reliability of the car overall.
PUBLICATION OF SCIENTIFIC PERIODICALS AT UNIVERSITIES:NEW CHALLENGES, PARTICIPANTS, TECHNOLOGY
Authors: Kolesnykova T. O. , Kliushnyk I. A.
Published: December 2015

Purpose. Publication of scientific periodicals in the Universities is very important and necessary element in the infrastructure of scientific communication. The aim of the article is: 1) providing a new model of publication system of the University scientific periodicals (on the example of Dnipropetrovsk National University of Railway Transport named after Academician V. Lazaryan – DNURT); 2) studying the peculiarities of the «Library publishing» model (Library Publishing) and library as a new participant in the publication of world scientific periodicals of the University; 3) description of the developed software automation typesetting of scientific articles and their integration into international databases of scientific and technical information. Methodology. The scientists investigated: 1) the system of publication of scientific periodicals at DNURT; 2) integration system of electronic versions of periodicals and individual articles of scientists from DNURT into the world scientific databases; 3) publishing activity of the scientific and technical library of the University. Findings. The authors proved the need for the fast updates in each higher education institution of Ukrainian management system of scientific periodicals and the creation of the periodicals development concept. The conditions for the occurrence of positive changes in the publishing process in Universities were determined and named as a new participant in these processes – University library. The list of new tasks inherent in the scientific periodicals of the Universities was presented. The software product «Digital designer» was created as a new applied information technology solution to extend the functionality of the basic system information of the publication according to its editorial policy. Originality. The scientists studied the transformation process of the organizational structure of scientific periodicals publishing in the Universities of Ukraine and the world. It is proved that in today's conditions for the University publishers of scientific periodicals transition to a new model of publication system of the University scientific periodicals is the most rational, a feature of which is the rejection of purely printing and the introduction of hybrid model of publication. This model assumes that traditional print products is complemented with a form of «Epub ahead of print» (e-publication before printing) using the journal's website as an operational channel for the dissemination of publications. Practical value. The Universities transition to the new model system for the publication of scientific periodicals, modern concept formation of the scientific journal, creation of relevant software tools (e.g. automation of typesetting the scientific articles and the integration of publications in the database of scientific and technical information) will allow improving the quality of journals and their competitiveness at the international level.
Network Coded Transmission in a Wireless Grid Network with an Energy Constraint
Authors: Stoian Rodica , Raileanu Adrian Victor , Perisoara Lucian Andrei
Published: December 2015

In wireless networks, routing based on packet forwarding does hardly yield optimum transmission performance in terms of network utilization and throughput. As an alternative to routing, network coding has been introduced in the recent years, where nodes are mixing the data instead of forwarding. In applications, random linear network coding is the most used method, due to its decentralized mode, and due to preserving the achievability of multicast capacity bounds. In this paper, we study the performance of network coding used for multicast transmission of messages in a wireless grid network with an energy constraint. Several energy saving schemes have been proposed in the literature, but in this study we will focus on duty cycling scheme, in which nodes are not always in on state. The performance is measured as the end-to-end delay, i.e. the duration until each node can decode the message sent by the source, and the CDF of observations is used to make analysis.
On Polar, Trivially Perfect Graphs
Authors: Talmaciu Mihai , Nechita Elena
Published: December 2015

During the last decades, different types of decompositions have been processed in the field of graph theory. In various problems, for example in the construction of recognition algorithms, frequently appears the so-called weakly decomposition of graphs.
Polar graphs are a natural extension of some classes of graphs like bipartite graphs, split graphs and complements of bipartite graphs. Recognizing a polar graph is known to be NP-complete. For this class of graphs, polynomial algorithms for the maximum stable set problem are unknown and algorithms for the dominating set problem are also NP-complete.
In this paper we characterize the polar graphs using the weakly decomposition, give a polynomial time algorithm for recognizing graphs that are both trivially perfect and polar, and directly calculate the domination number. For the stability number and clique number, we give polynomial time algorithms. 
Robust 2-DoF PID control for Congestion control of TCP/IP Networks
Authors: Vilanova Ramón , Alfaro Víctor M.
Published: December 2015

This paper presents how Robust PID control can improve the performance of congesion control on TCP/IP networks. The proposed approach is compared with other control methods, such as PI control or RED/AQM, showing the advantages of the proposed technique.
Tolerance of Elevated Ozone and Water Stress in a California Population of Palmer Amaranth (Amaranthus palmeri)
Authors: Paudel Rama , Grantz David A. , Vu Hai-Bang , Shrestha Anil
Published: December 2015

Palmer amaranth is a highly invasive weed species causing huge economic losses in agricultural cropping systems under a broad range of environmental conditions. Sensitivity of this species to ozone (O3) air pollution and to soil water deficit, relative to native species or competing crops, may affect its competitiveness and invasive potential. In recent years, both high tropospheric O3and soil water deficiency have become common in the San Joaquin Valley of California. Responses to these environmental parameters may help predict the invasiveness of this species and have implications for landscape hydrology. We assessed the impact of O3and soil water deficit on Palmer amaranth. Five- to seven-leaf–stage potted plants were placed in continuous stirred tank reactor chambers and maintained for 30 to 35 d under 12-h mean daylight O3exposures (0700–1900 hours) of 4, 59, or 114 ppb O3. Within the chambers the plants were either well-watered (WW) or exposed to regulated deficit irrigation (RDI) and grown for about 7 wk. Dry weights of the leaves, stems, roots, and leaf area were determined. Day- and nighttime stomatal conductances (gs) were measured at 1.5-h intervals. Nocturnalgswas about 16 to 29% of daytimegs; this suggests that the species could have substantial nighttime water loss, uncoupled from carbon gain in the weed, and could affect water availability for crops and reduce irrigation efficiency. Nocturnalgswas lower in the RDI than in the WW, but daytimegswas not affected by O3or irrigation regime. Neither O3nor irrigation regime affected root or shoot parameters. As O3and drought are two key stressors in the San Joaquin Valley, to which potential competing species have been found to be sensitive, Palmer amaranth may proliferate and become more invasive in the future, potentially altering landscape hydrology and reducing irrigation efficiency.
Угасание образовательного этоса
Authors: Lubimov Lev
Published: December 2015

Образование — создававшийся тысячелетиями институт воспроизводства человека не только как существа мыслящего и наученного какой-то работе, но и как субъекта, в котором сформированы духовные основы его существования. Эти основы всегда закладывали церковь, семья и образование. Увы, сегодня главная надежда — на образование. И тем более тревожно, если этос этого старейшего социального института угасает. Тогда возникает угроза и воспроизводству человека как мыслящего и наученного чтo-то делать индивида. В статье рассматривается состояние образовательного этоса в России.
Foolproof. Научить или уличить?
Authors: Teterina Olga
Published: December 2015

Краткий анализ современных тенденций развития системы образования с точки зрения практика, проработавшего в школе 30 лет. Революционные преобразования: могут ли верхи и хотят ли низы?
Результаты школьного образования в 2020 г.
Authors: Lebedev Oleg
Published: December 2015

В статье рассматривается роль социального заказа на результаты деятельности общеобразовательной школы в управлении качеством образования. Достижение новых образовательных результатов становится возможным, если школы воспринимают сигналы о существовании социального спроса на такие результаты. Значимыми сигналами для школы являются критерии оценки ее деятельности и направленность мер по стимулированию активности педагогических коллективов. Существующие сигналы направляют школу скорее на сохранение привычных целевых ориентиров, чем на их изменение. Если в ближайшие годы школа не получит убедительных подтверждений заинтересованности общества в действительном изменении качества образования, то результаты образовательной деятельности школ в 2020 г. будут мало отличаться от результатов 2008 г.
Interview with Leon Botstein (Bard College)
Authors: Botstein Leon
Published: December 2015

Leon Botstein is President of Bard College, Director of the American Symphony Orchestra, and Board Chairman of the Central European University. He is also an accomplished musicologist and historian of education. Among his publications on education is his book, Jefferson’s Children: Education and the Promise of American Culture. The following interview took place in Moscow, on April 1, 2015, when Dr. Botstein was in Russia to conduct the Russian National Or-chestra’s performance of pieces by Prokofiev and Bartok at the Tchaikovsky Concert Hall the following day.
Academic Advising for the Liberal Arts and Sciences
Authors: Shein David
Published: December 2015

In this article, I provide an overview of academic advising in the United States, articulate a definition of academic advising for the liberal arts and sciences, and defend three theses about the role of academic advising in promoting the sorts of critical thinking and civic engagement that makes the liberal arts and sciences an important catalyst for social and political change. First, I argue that academic advising is essential to the effective implementation of a liberal arts and sciences education and so, even if it were not a part of the concept of the liberal arts and sciences, it is essential to the realization of that concept. Second, I argue that advising is a part of the concept of a liberal arts and sciences education because of the role it plays in student-centered pedagogy, which is a cornerstone of the liberal arts and sciences. Finally, I argue that student-centered pedagogy is not limited to the classroom context, that it includes extraand co-curricular life, and so our account of liberal arts and sciences education needs to be expanded. These three theses constitute a series of increasingly robust challenges to the model of liberal arts and sciences education developed by Jonathan Becker in “Liberal Arts and Sciences Education: Responding to the Challenges of the XXIst Century” and, for educators who have been trained in the Humboltian/European tradition, provide some practical lessons in the development and implementation of that model.
On the Role of Mass Media in Promoting The Mission of Russian Education Policy (A Case Study of Talk Shows)
Authors: Radina Nadezhda , Shamanina Svetlana
Published: December 2015

The paper presents results of analyzing the 2012–2013 episodes of talk shows broadcasted by regional (Challenges of Life, NNTV channel, Nizhny Novgorod) and national (Let Them Talk, Channel One OJSC) channels devoted to education and education policy issues. The need for research reflection on these materials was justified by studying the documents of the recent years regulating the Russian education policy (laws, bylaws, programs, conventions, etc.), which allowed us to identify the key priorities of this policy: solving the staffing problem, enhancing the quality of education, improving its transparency, and equalizing education in Russia. Narrative analysis was performed to study the talk show data, namely we used open coding with creation of a coding system based on utterance qualitative assessment and with subsequent use of statistical procedures to analyze the data matrix. We also used the social problem rhetorical deconstruction method offered by Ibarra and Kitsuse. Based on the data obtained, we describe two education policy promotion strategies: 1) instruction and enlightenment integration of education policy principles and practices), realized to some extent in the regional talk show, and 2) entertainment and control (accentuated negative practices of controlling viewers’ minds through emotional pressure and shock) used in the One Channel talk show. We also discuss the attitude of the State towards such mass media strategies and the quality of media ef fects caused by talk shows in terms of education policies.
Education and Democracy: Cooperation or Conflict? Review of the book: Delbanco A. (2015) College: What it Was, Is, and Should Be
Authors: Lyubzhin Aleksey
Published: December 2015

The reviewer believes that A. Delbanco’s analysis of challenges produced by democratization of access to higher education in America should be of great interest to a Russian reader. His book investigates into the meaning higher education has for the country as a whole and for each individual, into the specifics of goals pursued by colleges and universities, into the abundance of academic dishonesty in American higher education institutions, as well as into the effect of modern education development trends on social inequality. Briefly outlining the author’s key bullet points on the history of American colleges, triggers of their establishment, teachers’ and students’ lifestyle, consequences of the reputation race, the reviewer keeps drawing parallels with the Russian education system. He argues that blurring the specifics of higher education under the rationale of wide public accessibility is even more dangerous for Russia than for America, where the background situation was much better.
Liberal Arts and Sciences in the Russian University Education System
Authors: Kudrin Aleksei
Published: December 2015

The liberal arts and sciences model is characterized by a number of specific features: Individual educational path, interactive teaching technologies, development of common cultural competencies (formation of basic learning and research skills, the distribution requirement), developing professional competencies and selecting the training profile, Interdisciplinary curriculum and individualized possibilities for accomplishing it. Fif teen years of experience in the development of liberal education within Russian higher education give grounds to conclude that this educational model helps assure a high quality of training that meets the top international standards. Many higher education institutions contact Faculty of Liberal Arts & Sciences at St. Petersburg State University asking for advisory and methodological assistance in transferring these technologies. In this connection Faculty of Liberal Arts & Sciences have developed, approved and launched the implementation of a supplementary educational program of advanced training for the teaching staff at higher education institutions, aimed at helping teachers learn to use liberal education techniques.