bluuebunny/crossref_metadata_2025 huggingface dataset:
Liquidity Management in the Large Value Payment Systems
Authors: Arciero Luca , Picillo Cristina
Published: September 2014

With the advent of Large Value Interbank Fund Transfer Systems operating on an RTGS basis, the bank liquidity management problem has become a crucial issue in payment system analysis for its interrelations with the key monetary policy variables, namely, the short-term interbank interest rate. The analysis of the RTGS system is far from being a trivial task due—mostly—to the complexity and the endogeneity. These stem from the multiplicity of heterogeneous participants (complexity) usually joining a system, whose decisions produce a spillover effect on the rest of the system, which prevents any participant from solving its liquidity demand problem in isolation (endogeneity). Agent Based Models seem to present a few advantages in analysing the payment system in comparison to microfounded ones, as well as to standard simulations: behavioural rules can be assigned to a multiplicity of banks defining the lending or borrowing timing as well as the liquidity sources. Therefore, Agent Based Modelling seems to represent an additional instrument by which to analyse the connection between the payment system and the functioning of one of the most important liquidity sources, the interbank money market.
A Competitive Approach to Financial Issues
Authors: Okur Mustafa , Gurbuz A. Osman
Published: September 2014

Efficient Market Hypothesis (EMH) is a cornerstone in modern finance theory. Efficient market hypothesis states that it is impossible to make abnormal returns in financial markets because financial asset prices always reflect all available information. This chapter was undertaken in order to give a brief survey of modern finance theory by mainly focusing on the efficient market hypothesis. The authors also discuss the empirical foundations of the efficient market hypothesis. Finally, the main challenges to the efficient market hypothesis are introduced in order to point out a perspective for future research.
A Game Theoretic Approach to Corporate Lending by the Banks in India
Authors: Das Rituparna
Published: September 2014

A series of corporate loan defaults facing the Indian banks in the post-crisis period of 2008 led to the downgrading of India's global credit rating in 2012. Against this backdrop, this chapter delivers an insight to the reader into the games that occur between lending banks and corporate borrowers in addition to the games between the banks themselves in lending competition. The chapter covers various strategies of actions in the structures of bilateral monopoly, duopoly, and oligopoly, the Nash equilibrium, prisoners' dilemma, decision trees, and binomial analysis. In modeling the default probability, the profits of the lender and the borrower, a number of corollaries, one lemma, and one theorem are deduced in this chapter.
Money Supply
Authors: Das Rituparna
Published: September 2014

Money supply is nowadays expected to contain precise, comprehensive, and real-time information about the macroeconomic system to facilitate decision making of the Central Bank. Because money supply, as driver or driven, is linked from time to time to several other variables like inflation, it touches every lair of civil society and politics. An important aspect of understanding such information is to identify other variables and their interrelations with money supply and the models to quantify and predict the same. This chapter covers various facets and issues of modeling and forecasting money supply in India in a comparative tone between pre- and post-crisis periods.
A Conceptual Framework for Online Stock Trading Service Adoption
Authors: Abroud Alireza , Choong Yap Voon , Muthaiyah Saravanan
Published: September 2014

Globalization and recent advancement in the deployment of Internet and related technologies, have significantly transformed all sectors of the modern economy. For instance, electronic service has enabled the application of Internet platform in stock trading, thereby empowering individuals across diverse location to engage in trading activities. As established by extant theories on technology acceptance, individuals are expected to exhibit different attitude and behaviour towards new technology. This study aims to develop a conceptual model, which can explain the antecedents of individual investors' intention to adopt online stock trading service. Specifically, this study identifies three new constructs (trust perception, investors' knowledge and economic value) by integrating theory of planed behavior (TPB) and technology acceptance model (TAM), with perspective from transaction cost theory (TCT).
Structural Models for E-Banking Adoption in Vietnam
Authors: Pham Long , Cao Nhi Y. , Nguyen Thanh D. , Tran Phong T.
Published: September 2014

E-banking is seen as the newest delivery channel for banking services in many developed countries and is believed to have a significant impact on the bank market. E-banking is providing numerous opportunities for banks and non-bank financial institutions to add a low cost distribution channel to their existent distribution channels. Little research on factors influencing the adoption of e-banking has been implemented in countries with very high economic growth rates (such as Vietnam) that are emerging as new potential markets. Thus, this study has, based on an extensive literature review on e-banking benefits for both banks and their customers and relevant theories on innovation adoption, proposed alternative models (including both moderator and mediating effects) of e-banking intention to use by customers in Vietnam. Furthermore, a set of model hypotheses presenting relationships among factors influencing e-banking intention to use have been set up. Practical implications and future studies were also discussed.
ICT Infrastructure Framework for Microfinance Institutions and Banks in Pakistan
Authors: Ali Sadiq Shahbaz , Khan M. N. A.
Published: September 2014

Information and communication technology (ICT) can be termed as a reagent for the microfinance sector. It has contributed significantly for the growth of this sector, which is clearly depicted from the reviewed literature as well as the market evaluation. The paper analyzes the impact of technological advancements within the microfinance industry from academic as well as practitioner's point of view. The true advantage of that advancement in the technology is yet to be realized by this sector. The paper proposed that ICT components on an optimized approach can be beneficial for a new as well as an experienced microfinance player for the efficient and cost effective delivery of its services to the masses without any major hindrance.
Mutual Fund Performance and Investor's Perception
Authors: Adhikary Anindita , Bora Bedanta , Kumar Jitendra
Published: September 2014

The Indian mutual fund industry is playing a significant role in the development of capital market and in the growth of the Indian economy. It is considered to be a better opportunity where savings are collected from investors and diverted to the capital market to generate better returns for them with lower risk and volatility. Hence, it is of utmost significance to understand the mutual fund industry in India. As such, this chapter makes an attempt to review the various literatures available in regard to mutual funds to evaluate the performance of various mutual fund schemes and to study the investor's perception in selection of a mutual fund. The study shows that mutual funds have failed to offer advantages of diversification and professionalism to the investors and hence could not fulfil their scheme's objectives. It is also found that retail investors are still confused about the mutual funds as an investment avenue. In order to attain sustained profitable growth, the industry should focus on developing distribution networks, increasing retail participation and expanding the reach of mutual funds by conducting awareness programs and extending financial literacy.
Agricultural Investment Risk Relationship to National Domestic Production
Authors: Omankhanlen Alex Ehimare
Published: September 2014

This empirical case study investigated the uncertainty of agricultural investment schemes in Nigeria and their relationship to national domestic production. Government administrations have invested a substantial amount of money into the agricultural sector, yet thus far, there have been very few visible results to show for it. The private sector does not seem to be interested in developing agriculture even with government incentives. The purpose of this study is to identify investment risk factors for national agriculture development as perceived by business stakeholders. Ordinary Least Square (OLS) was then used to examine the strength of the cause-effect relationship for the agricultural investment factors in terms of expected domestic production. The findings were that there was no significant relationship between commercial bank credit granting to businesses for agricultural development and therefore no impact on national domestic production. On the other hand, the regression analysis did support the hypotheses that there was a significant relationship between government funding towards the agricultural sector and national domestic production as well as a significant relationship between the public agriculture credit guarantee scheme and national domestic production, respectively. Based on this positive finding, the study closes with several unique recommendations for policy makers in order to stimulate the investment into the agricultural sector to increase national production.
Use and Management of Conventional ICT and Mobile Technology in Microfinance
Authors: Mia Mohammad Badruddozza , Ramage Magnus
Published: September 2014

Microfinance has been a significant means of reducing poverty since the mid-1970s. With the economic, social, and demographic characteristics, Bangladesh has been one of the countries where microfinance interventions are notable. In Bangladesh, hundreds of microfinance organisations have been implementing microfinance programs covering almost one-third of the rural population of the country. Studies show that the proper use of Information and Communication Technology (ICT) may help microfinance intervention in different ways. It may help increase operational performance, organisational upsizing, and poverty outreach, and decrease interest rate with many other organisational and social implications. This chapter looks into the Information Systems (IS) of microfinance of Bangladesh, the extent and intensity of the use of ICT, the factors that hinder the use of ICT in microfinance, the approaches to ICT management, and the emerging mobile technology-based operational model of microfinance and perceived implications of the changing landscape of ICT on this development program.
Racial Differences in Financial Socialization and Financial Behaviors of U.S. College Students
Authors: Gutter Michael S. , Copur Zeynep , Blanco Amanda
Published: September 2014

This chapter focuses on the effect of race on financial socialization and financial behavior of college students. Data (N = 13,845) were collected from current college students age 18 and over via an online survey throughout the United States during spring and fall of 2008. Results from means comparisons showed significant differences on the financial socialization between Black and White college students. Logistic regression results suggest important relationship exist between race and financial behaviors. Black students were less likely to save and more likely to engage in risky credit card behavior than White students after controlling for the effects of all other variables.
The Behavior Intention of Tunisian Banks' Customers on using Internet Banking
Authors: Charfeddine Lanouar , Nasri Wadie
Published: September 2014

This paper examines empirically the factors affecting the adoption of internet banking in Tunisia using the Theory of Acceptance Model (TAM) and the Theory of Planned Behavior (TPB). Security and privacy construct were selected as additional factors because of their potent influence on the use of internet banking system. For this purpose, a Structural Equation Modelling (SEM) is employed to examine the inter-correlations among the seven proposed constructs. A survey involving a total of 284 respondents is conducted and confirmatory factor analysis used to determine the measurement efficacies. This study confirms the appropriateness of TAM, TPB, and the security and privacy construct in predicting intention to use internet banking in a Tunisian banking environment. This research reveals that TAM and TPB could be used to provide a solid theoretical foundation of internet banking in Tunisian acceptance case. The study contributes to the literature of internet banking in Tunisia.
Corruption's Effect on Foreign Direct Investment
Authors: Pupović Elvira
Published: September 2014

This study introduces a new perspective on the role of corruption in investment growth and provides quantitative estimates of the impact of corruption on the investment inflows. Motivated by these issues, the main objective of this article is to empirically reexamine the effects of corruption on foreign direct investment (FDI) inflows in Bosnia and Herzegovina, by incorporating a further link between corruption and investment inflows as new understanding investment concepts. Using data from Transparency International report, World Bank and National Banking Statistical data, it is manifested in a cross sectional setting that corruption has a negative and significant impact on the foreign direct investment inflows. The new model of eliminated unexpected risk involved managing corruption's effect on investments. One has to immediately consider the linkage between corruption and investment inflows and to learn how to manage this phenomenon like old risk of a new model.
Computing Skills in Forecasting for Liquidity Risk Management in the Indian Banking Industry
Authors: Das Rituparna
Published: September 2014

Liquidity Risk Management (LRM) in the banking industry happens at two levels: (1) the Central Bank (i.e. the regulator) and (2) the commercial banks. The term “liquidity” for the Central Bank means the monetary base consisting of the currency and the reserves in the banking system. These are the supply side of the interest rate market. The Central Bank being the only supplier of the same can target the interest rates by varying supply of monetary base and vice versa. There are several ways including auctioning and redeeming the government securities for squeezing and pumping liquidity into the system. However, before such recourse, the Central Bank needs an assessment of the liquidity requirement of the system and applies the forecasting techniques, which are mostly econometric by nature involving the time series data. This chapter explores this process.
Enabling Factors for Knowledge Sharing among Employees in the Workplace
Authors: Assefa Temtim , Garfield Monica , Meshesha Million
Published: September 2014

This chapter investigates enabling factors that promote knowledge sharing among employees in the workplace. The study was conducted on employees of Commercial Bank of Ethiopia (CBE) as a research case. Banks in particular and financial institutions in general are now becoming knowledge intensive organizations where knowledge is used as a key strategic resource to achieve their business goals as well as competitive advantage. This study uses an exploratory case study research method that allows deeper understanding and interpretation. Although there is plenty of literature on knowledge sharing, existing findings are not consistent due to the influence of contextual factors on knowledge sharing. This study identifies organizational, individual, task characteristics, and technological factors as main enabling factors that promote knowledge sharing in the workplace. Although organizations put much emphasis on technology to promote knowledge sharing in the workplace, non-technological factors (organizational and individual factors) appear more significant. As the study was conducted on a commercial bank within developing economies context, it contributes additional perspectives to confirm or extend existing findings on knowledge sharing.
Business Intelligence Enterprise Solution at Abu Dhabi Finance
Authors: Abdallah Salam
Published: September 2014

The challenge of transforming data and information in enterprise information systems into knowledge that can be rolled up and presented to management as key performance indicators is business-critical. The implementation of a business intelligence layer on top of the transaction processing systems and management information systems is viewed as an opportunity to move up a level to promote knowledge-based decision-making and strategic planning. This chapter attempts to examine the issues and challenges associated with the initiative by Abu Dhabi Finance to implement business intelligence solutions that extract information from the enterprise information systems, present them as KPIs for senior management, and produce knowledge that can be used to support decision-making and strategic planning.
Does Geography Matter?
Authors: Zhou Bin
Published: September 2014

This study investigates the role of geography in shaping the average bank office size in Illinois banking. “Geography” here refers to a host of socioeconomic, demographic, and local community characteristics at the bank market level. The study finds that larger bank markets, higher levels of market concentration, higher percentages of whites within the total population, and less physical fragmentation within a geographical bank market contribute to larger average bank office sizes. The use of technology, represented by higher percentages of physical capital and premises in the total assets, is found to reduce the bank office size. This tendency is further reinforced by a lack of economies of scale at the bank office level. At the same time, the study finds that the greater adoption of internet banking is associated with larger bank offices. These findings provide indirect evidence that market structure has an impact on the adoption of alternative banking technologies. A study of bank office size has practical implications in providing insights into the future branch strategy, as well as the inadequate nature of measures of market power currently used in antitrust regulation.
An Empirical Investigation on Credit Card Adoption in India
Authors: Varaprasad G. , Chandran Kailas Sree , Sridharan R. , Unnithan Anandakuttan B.
Published: September 2014

In India, the credit card usage as well as the penetration has been found to be very low compared to that of debit cards. Though banks offer the best of the services, still there are apprehensions about the risks involved in using a credit card in India. Hence, this study investigates the customer's adoption behavior of credit cards and determines the factors which influence the acceptance among Indian customers. Many studies have been reported in the literature to analyze the customer's adoption behavior of online banking, Automated Teller Machines, e-shopping etc. But, there are not many studies that analyze the adoption behavior of credit cards. In this study, an empirical model that includes ten behavioral factors has been proposed. Along with the main determinants identified from the literature, two new parameters such as perceived benefits and self-esteem have been included in the model. The analysis of the model reveals that factors such as perceived usefulness, perceived ease of use, perceived risk, relative advantage, perceived trust, social influence and perceived benefits have been found to be the main determinants of credit cards adoption in India. The findings are of great use primarily for the banks which are planning to offer credit cards, and for already existing banks to focus on the gaps.
Determinants of Behavioral Intention to Mobile Banking in Arab Culture
Authors: Rashed Abdullah , Santos Henrique
Published: September 2014

Nowadays, new tools and technologies are emerging rapidly. They are often used cross-culturally before being tested for suitability and validity. However, they would be validated to ensure that they work with all users, not just part of them. Mobile banking (as a new technology tool) has been introduced assuming that it performs well concerning authentication among all members of the society. We aim to validate mobile banking intention to use, through Technology Acceptance Model (TAM), focused on security, in Arabic countries, namely Yemen. The results confirm the previous studies that have shown the importance of perceived ease of use and perceived usefulness.
Assessing the Maturity of Control Objectives for Information and Related Technology (COBIT) Framework in the Egyptian Banking Sector
Authors: Abdelsalam Hisham M. , Marzouk Ahmed M , Hamza Haitham S.
Published: September 2014

Banking sector in Egypt is one of the largest business sectors in terms of contributing to country economic growth and in terms of investing in information technology (IT). Thus, implementing a good Information Technology (IT) governance framework inside Egyptian banks is a rather critical issue. The purpose of this chapter is to assess the importance and the implementation of Control Objectives for Information and Related Technology (COBIT) high level processes in the Egyptian banking sector. A total of 25 working banks in Egypt which are registered in the Central Bank of Egypt (CBE) from (public sector, private and joint venture and foreign) banks were interviewed in a series of one-to-one interviews. The results of this study showed that although the majority of interviewed Chief Information Officer (CIO), IT Managers, IT Auditors and others perceived the importance of COBIT high level processes in their organizations, the majority of the Egyptian banks have a below average maturity level for most of the COBIT processes.
Emerging Legal Issues in Banking Operations
Authors: Aslanova Kemale
Published: September 2014

This chapter deals with legal issues in banking activities, which have gained interest during the past decade. It determines the place of legal issues related to banking activities, such as consumer loans, credit cards, and electronic banking, which all have gained even more importance after the last global financial crisis. The chapter focuses on the comparative analysis of current legal issues in Turkey and in the European Union and the legal issues related to risks in the sphere of electronic banking and suggests potential strategies.
Data Mining using Advanced Ant Colony Optimization Algorithm and Application to Bankruptcy Prediction
Authors: Arora Vishal , Ravi Vadlamani
Published: September 2014

Ant Colony Optimization (ACO) is gaining popularity as data mining technique in the domain of Swarm Intelligence for its simple, accurate and comprehensive nature of classification. In this paper the authors propose a novel advanced version of the original ant colony based miner (Ant-Miner) in order to extract classification rules from data. They call this Advanced ACO-Miner (ADACOM). The main goal of ADACOM is to explore the flexibility of using a different knowledge extraction heuristic approach viz. Gini's Index to increase the predictive accuracy and the simplicity of the rules extracted. Further, the authors increase the information and the prediction level of the set of rules extracted by dynamically changing specific parameters. Simulations are performed with ADACOM on a few benchmark datasets Wine, WBC (Wisconsin Breast Cancer) and Iris from UCI (University of California at Irvine) data repository and compared with Ant-Miner (Parpinelli, Lopes, & Freitas, 2002), Ant-Miner2 (Liu, Abbass, & McKay, 2002), Ant-Miner3 (Liu, Abbass, & McKay, 2003), Ant-Miner+ (Martens, De Backer, Haesen, Vanthienen, Snoeck, & Baesens, 2007) and C4.5 (Quinlan, 1993). The results show that ADACOM outperforms the above mentioned algorithms in terms of predictive accuracy, simplicity of rules, sensitivity, specificity and AUC values (area under ROC curve). In addition, the ADACOM is also employed to extract rules from bank datasets (UK, US, Spanish and Turkish) for bankruptcy prediction and the results are compared with that obtained by Ant-Miner. Again ADACOM yielded better results and is proven to be the better choice for solving bankruptcy prediction problems in banks
A Complementary Cyber Swarm Algorithm
Authors: Yin Peng-Yeng , Glover Fred , Laguna Manuel , Zhu Jia-Xian
Published: September 2014

A recent study (Yin, et al., 2010) showed that combining Particle Swarm Optimization (PSO) with the strategies of Scatter Search (SS) and Path Relinking (PR) produces a Cyber Swarm Algorithm that creates a more effective form of PSO than methods that do not incorporate such mechanisms. In this chapter, the authors propose a Complementary Cyber Swarm Algorithm (C/CyberSA) that performs in the same league as the original Cyber Swarm Algorithm but adopts different sets of ideas from the Tabu Search (TS) and the SS/PR template. The C/CyberSA exploits the guidance information and restriction information produced in the history of swarm search and the manipulation of adaptive memory. Responsive strategies using long-term memory and path relinking implementations are proposed that make use of critical events encountered in the search. Experimental results with a large set of challenging test functions show that the C/CyberSA outperforms two recently proposed swarm-based methods by finding more optimal solutions while simultaneously using a smaller number of function evaluations. The C/CyberSA approach further produces improvements comparable to those obtained by the original CyberSA in relation to the Standard PSO 2007 method (Clerc, 2008). These findings motivate future investigations of Cyber Swarm methods that combine features of both the original and complementary variants and incorporate additional strategic notions from the SS/PR template as a basis for creating a still more effective form of swarm optimization.
Hybrid Swarm Intelligence-Based Biclustering Approach for Recommendation of Web Pages
Authors: Rathipriya R. , Thangavel K.
Published: September 2014

This chapter focuses on recommender systems based on the coherent user's browsing patterns. Biclustering approach is used to discover the aggregate usage profiles from the preprocessed Web data. A combination of Discrete Artificial Bees Colony Optimization and Simulated Annealing technique is used for optimizing the aggregate usage profiles from the preprocessed clickstream data. Web page recommendation process is structured in to two components performed online and offline with respect to Web server activity. Offline component builds the usage profiles or usage models by analyzing historical data, such as server access log file or Web logs from the server using hybrid biclustering approach. Recommendation process is the online component. Current user's session is used in the online component for capturing the user's interest so as to recommend pages to the user for next navigation. The experiment was conducted on the benchmark clickstream data (i.e. MSNBC dataset and MSWEB dataset from UCI repository). The results signify the improved prediction accuracy of recommendations using biclustering approach.
Path Relinking Scheme for the Max-Cut Problem
Authors: Shylo Volodymyr P. , Shylo Oleg V.
Published: September 2014

In this chapter, a path relinking method for the maximum cut problem is investigated. The authors consider an implementation of the path-relinking, where it is utilized as a subroutine for another meta-heuristic search procedure. Particularly, the authors focus on the global equilibrium search method to provide a set of high quality solutions, the set that is used within the path relinking method. The computational experiment on a set of standard benchmark problems is provided to study the proposed approach. The authors show that when the size of the solution set that is passed to the path relinking procedure is too large, the resulting running times follow the restart distribution, which guarantees that an underlying algorithm can be accelerated by removing all of the accumulated data (set P) and re-initiating its execution after a certain number of elite solutions is obtained.
Image Segmentation Based on Bio-Inspired Optimization Algorithms
Authors: Mo Hongwei , Xu Lifang , Geng Mengjiao
Published: September 2014

This chapter addresses the issue of image segmentation by clustering in the domain of image processing. Fuzzy C-Means is a widely adopted clustering algorithm. Bio-inspired optimization algorithms are optimal methods inspired by the principles or behaviors of biology. For the purpose of reinforcing the global search capability of FCM, five Bio-Inspired Optimization Algorithms (BIOA) including Biogeography-Based Optimization (BBO), Artificial Fish School Algorithm (AFSA), Artificial Bees Colony (ABC), Particle Swarm Optimization (PSO), and Bacterial Foraging Algorithm (BFA) are used to optimize the objective criterion function, which is interrelated to centroids in FCM. The optimized FCMs by the five algorithms are used for image segmentation, respectively. They have different effects on the results.
Investigation of Liquid-Steam Stream Compressor
Authors: Prokopov M.G. , Levchenko D.A. , Artyukhov A.E.
Published: September 2014

Thermophysical model of liquid-steam stream compressor, results of analysis of experimental researches of boiling up streams of liquid in the broadening ducting and running part of liquid-steam stream compressor, description of forming of three critical modes of flow and structural inversion of stream are presented in this article. The mathematical model of working process which allows to determine parameters and characteristics of liquid-steam stream compressor is presented.
Development of Mathematical Model of Working Process of Multi-Functional Heat-Generating Aggregate-Hydromill
Authors: Papchenko Andrej , Kovalyov Sergiy , Ovcharenko Mykhailo , Barykin Oleg
Published: September 2014

Analytical model of working process, which reflects dependence of energy curve from constructive and regime parameters of machine, is developed by means of mathematical analysis in the article. Adjustment of mathematical model was implemented by physical modelling of working process of multi-functional aggregate-hydromill. Adequacy of obtained regularities was checked.
Axial Flow Seal/Bearing Efficient Pressure Formulation for a Reynolds Equation Solution
Authors: Allaire Paul , Yurko Vladimir , Cao Jian Ming , Dimond Tim
Published: September 2014

Current fluid film seal/bearing pressure numerical solutions taking into account both circumferential and axial lubricant flows are not in wide spread use. The most common method is to solve a two dimensional finite element method of Reynolds equation. However, this type of solution often leads to a long computer solution times when employed in an advanced seal/bearing code. A new approximate solution of Reynolds equation for oil seal or bearing flows is proposed in this paper which includes the axial flow modeling. The objective is achieved by means of an axial approximation that can be used to develop a one dimensional centerline circumferential pressure finite element solution to Reynolds equation. Optimization of the parameters associated with the approximate solution parameters is shown. Example seal/bearing pressure and load capacity calculations are presented and the solution verified by comparison with a full finite element 2-D solution. Also, the method of calculating the axial and circumferential lubricant flows as well as axial and circumferential power losses are presented and validated.
Modeling of Centrifugal Pumps Operating Modes
Authors: Boiko Valeriy S. , Sotnyk Mykola I. , Khovanskyy Sergey O. , Gapich Lidia V.
Published: September 2014

Research of centrifugal pumps’ workflow through their modeling is made. The methods of modeling such processes are viewed: by traditional numerical method and by proposed purely electrical methods of modeling. By comparing modeling results with test results the adequacy of modeling by purely electrical methods is proved.
Analysis of a Nonlinear Elastic Force in a Relatively Long Annular Seal and its Impact on the Dynamics of the Rotor
Authors: Beda Alexandr , Simonowsky Vitaliy
Published: September 2014

The authors have developed a method of calculating the non-linear elastic force that arises in the clearance seal of a finite length. The authors have analysed the force impact on the dynamics of the rotor of a centrifugal machine.
Static and Dynamic Analysis of the Closing Rotor Balancing Device of the Multistage Centrifugal Pump
Authors: Pavlenko Ivan
Published: September 2014

In this paper the methods of static and dynamic analysis of the closing rotor balancing device of the multistage centrifugal pump are represented. On an example of the feed pump PE 600-300 static and dynamic characteristics are determined. Defined the resonance frequencies and investigated stability of the system “pump rotor – automatic balancing device – pressure difference regulator”. The dependence for the pressure difference and conditions to ensure reliable operation of the locking rotor balancing device are determined.
The Lubrication Regimes of Mechanical Face Seals
Authors: Brunetiere Noël
Published: September 2014

Mechanical face seals are usually described as contacting seals because their faces are in partial contact during static conditions. However, many experiments demonstrated that this contact is not maintained during operation. Indeed a full fluid film can separate the seal surfaces leading to lower friction and wear. In this paper, the mechanisms of lubrication taking place at the seal interface are reviewed and analyzed through simulations and experiments. It is shown that several lubrication regimes can be experienced, depending on the operating conditions and on the seal design. At low speed values the lubrication regime is mixed and turns to hydrodynamic lubrication regime when the speed is increased. At higher rotation velocity, the dissipated power generates thermal gradients and leads to thermally controlled lubrication regime. The transition between the lubrication regimes is also discussed and dimensionless parameters controlling the transition are proposed.
The Calculation of Static Characteristics of Impulse Gas Seal
Authors: Martsynkovskyy Volodymyr , Kundera Czeslaw , Khalizeva Alona
Published: September 2014

Mathematical background for static analysis of impulse gas seal is created in current paper. It includes evaluation of gap and flow rates of gas in turbocompressors. This paper consists of two parts. In the first one all logical steps of creation of the theoretical model for impulse gas seals are given. It should be mentioned, that they are valid for isothermal steady process which is observed here. The verification of derived theory is shown in the second part on a calculation example.
Sealing of Pipelines Flange Connections in Conditions of Fasteners Tightening Torque Reducing
Authors: Bondarenko Oleg , Dziuba Anatoliy
Published: September 2014

Flanged connections are widely used in pipelines of various technical systems. Task of reducing the consumption of materials pipelines , ensuring their long-term tightness is highly relevant for shipbuilding , aviation and space technology and other mashinebuilding. In this paper, the task of deliberately reducing torque fasteners flange connection at build pipelines to ensure the initial tightness of the connection , reducing the weight of the pipeline , the alignment of the stress- strain state of the compound and determining the residual torque fasteners, providing connections for leaks. With decreasing torque fasteners ( intentional or natural ) will be sealed flanged if the remaining torque is sufficient to compensate for the pressure in the pipeline and prevent shear movement of the flange and gasket relative to each other . Found that the flange connection remains sealed with natural and deliberate reduction torque fasteners to 75-80 % compared to the initial .Sealing flange connections using technology and standard fastenings to reduce their weight by 10-50 %, and the replacement of flanges and pipe material - a whole lot of pipelines at 30-65 %.
Study of Flow Pattern in Components of Intermediate Stage Vanes Diffuser of Centrifugal Pump
Authors: Lugova Svitlana , Olshtynskyi Pavlo , Tverdokhleb Igor , Davidenko Andryi
Published: September 2014

This article presents the analysis of the flow pattern in the vanes diffuser with discontinuous crossover channels. We observe design features of the crossover channels and their influence on the flow pattern
Elastic Bellows Prepared by Selective Laser Sintering
Authors: Kundera Czesław , Kozior Tomasz
Published: September 2014

The article contains the results of studies concerning the effects of selected parameters of the manufacturing process of elastic bellows on their elastic properties and strength. Bellows models were made using additive technology SLS selective laser sintering, in which the material used to construct models was a polyamide PA 2200. Bellows printing process proceeded in a surface parallel to the axis of the bellows and in a surface perpendicular to it. Based on measurements of deformation coefficients of elasticity of bellows were determined, also the measure of the maximum axial force exerted by the bellows while loading the internal pressure was carried out. Comparing the measurement results a significant effect of process parameters on the flexible properties of elastic bellows and their resistance to internal pressure were determined.
Assessment of the Mechanical Properties of a Diesel Engine Injector
Authors: Bąkowski Andrzej , Jaroszewicz Jerzy , Radziszewski Leszek
Published: September 2014

An analytical and experimental model was proposed to determine sac volume pressure changes and fuel doses injected into the diesel engine cylinders. The model takes into account friction forces and identifies the mechanical properties of the injector. The engine performance results were analysed statistically. The results of the Lilliefors, Pearson, Shapiro-Wilk and Jarque-Bera tests provided evidence that, under certain engine operating conditions, the null hypothesis about the compatibility of the measurement data with the normal distribution can be rejected. The measurement uncertainty for the injector needle lift was estimated. The engine was powered with diesel or biofuel. The difference between the measured and the predicted fuel doses amounted to approximately 3%.
Determination of Reliability of Rotor-Annular Seals System by Theory of Runs of Random Functions
Authors: Tarasevich Yulia , Savchenko Anna
Published: September 2014

The paper discusses forced combined angular-radial oscillations of rotor centrifugal pump model under the influence of random forcings. System reliability is evaluated using the theory of random functions runs: the probability of finding a random vector of quality system “rotor-annular seals” in the range of admissible values of its parameters is determined. Evaluation of the influence of erosive wear of sealing surfaces in the process of pump operating on reliability system is made.
Dynamics of the Interaction between Human Circulatory System and Centrifugal Pump as a Left Ventricle Assist Device
Authors: Altyntsev Ievgenii , Korczak Andrzej
Published: September 2014

Mathematical modeling of the complex process in the human cardiovascular system is powerful tool to evaluate the dynamic system response for the parameters change. Widely used continuous flow pumps (Left Ventricle Assist Device - LVAD) interacting with the circulatory system and work parameters of the assist device are changing dynamically. Different parameters of the system affect the pump operating conditions and on the contrary. Mathematical modeling of interaction between the cardiovascular system and mechanical assist device allows to identify the dangerous effects in the pump and system operation, and to eliminate such situations in the practical using of such pumps.
Considerations Regarding the Pumps Vibration Monitoring Using Proactive and Predictive Maintenance Programs
Authors: Oprea Alisa Filofteia , Popa Nicolae , Onescu Constantin
Published: September 2014

The purpose of the pumps safety and failure mechanism used in processing industry is the loss limitation using mechanical face seals. Studying the notified damages analysis, the conclusion shows that in a high percent these were induced by vibrations. The vibration monitoring, as part of a proactive and predictive maintenance program, becomes necessary to reduce the environment pollution and the mechanical face seals damages. Due to the fact that the analyzed system is made of centrifugal pump, coupling, bearings and electric motor, we will use vibrations in the diagnose process.
New Method of Friction Assemblies Reliability and Endurance Improvement
Authors: Tarelnyk Viacheslav , Martsynkovskyy Vasyl , Dziuba Aleksandr
Published: September 2014

Thus a new method of shaft necks processing is suggested for practical application, including application of soft antifriction metal coating, chosen from group: indium, tin, copper, silver, which differs that the coating is applied by electroerosion alloying on the shaft neck surface with discharge energy 0,01-0,03 J in the final operation, or the coating of copper or silver is applied with discharge energy 0,04-0,4 J and subject to post-processing, for example nonabrasive ultrasonic finishing. In such cases the surface layer with the microhardness less that the microhardness of the backing is formed. That promotes the fall of friction assembly normal operation and reduces the possibility of babbit microfractures formation in cubic crystals SnSb, which subsequently become the center of fractions formation in bulk of the layer.
Methods Development for Determining the Aerodynamic Characteristics of Vertical Exist of Wind Turbine
Authors: Lupoviy Vitaliy , Papchenko Andrej
Published: September 2014

Description of works for development of methods for determining the aerodynamic characteristics of vertical axis wind turbine is given in this article. Algorithm of aerodynamic tunnel designing and mounting is given. Compare air flow characteristics in working section of tunnel obtained by numerical simulation and probing. Describe the method of determining windwheel power. Comparison of the turbine characteristics obtained by this method with experimental dependences obtained earlier
Evaluation of Oil Viscosity Influence on Hydraulic Shock in Long Pipe
Authors: Bureček Adam , Hružík Lumír , Vašina Martin
Published: September 2014

This article is aimed at mathematical simulation and experimental measurement of dynamics of liquid and pipe wall during hydraulic shock. Liquid compressibility and hydraulic line elasticity are taken into account in this case. The mathematical model is created using Matlab SimHydraulics software. The long pipe is simulated by means of segmented pipe. Experimental measurement is performed on a hydraulic system, which consists of flow-controlled aggregate, long pipe and seat valve. The hydraulic shock is caused by step closing of the seat valve that is located at the pipe end. Pressures at the end of the long pipe, oil flow and temperature are experimentally measured.
Mining Submersible Pump - Design, Characteristics and Protections
Authors: Korczak Andrzej , Peczkis Grzegorz , Synowiec Tomasz , Altyntsev Ievgenii
Published: September 2014

This paper presents new construction of a submersible pump which is highly efficient due to the new solutions for flow channels. It includes the results of laboratory tests of the pump of the new construction. It also presents the results of numerical calculations of liquid’s movement in the flow channels of the pump, comparison of computing characteristics and characteristics measured in the laboratory.and an analysis of the essential parameters of the pump’s work which transgression could become a danger for the pump. In case of the danger the security system turns off the engine temporally or permanently.
Global Structure Strength Analysis of SWATH Based on Direct Calculate Method
Authors: Zhen Chun Bo , Feng Liang , Lu Guo Chun , Hou Yuan Hang
Published: September 2014

The stress concentration of SWATH’s cross-deck structure is serious and the problem of its structure strength appears particularly important. In this paper, A 3-D global element model of SWATH was built, the design Loads, load cases and boundary conditions were studied. on the base of that, the structure response analysis was completed. The result show that the global ship’s stress is small in all load cases of head seas and oblique seas, and the bulkheads have serious stress concentration phenomenon in beam seas.The result can offer the reference for SWATH’s design and development.
Renovation of Educational Buildings to Increase Energy Efficiency
Authors: Vatin Nikolai , Petrichenko Mikhail , Nemova Darya , Staritcyna Anastasiia , Tarasova Darya
Published: September 2014

The article presents results of energy inspection of an educational building “Hydrotechnical building-2” of the Saint-Petersburg State Polytechnical University. The energy audit was carried out to estimate energy resources performance and define opportunities for its increase. According to the results of energy audit the analyses of state of energy consumption are provided. The class of energy efficiency is defined. The recommendations and prospective opportunities to save energy and increase power efficiency of “Gidrokorpus-2” are presented as a resume of this article.
Research of Anti-Extrusion Process for Cylinder of Spray-Formed Ultra-High Strength Aluminum Alloy
Authors: Huang Shu Hui , Li Zhi Hui , Xiong Bai Qing , Zhang Yong An , Li Xi Wu , Liu Hong Wei , Wang Feng , Sun Peng
Published: September 2014

Anti-extrusion process for the cylinder of spray-formed ultra-high strength aluminum alloy is researched in this paper. The spray-formed 7xxx aluminum alloy is treated by a two-step homogenization treatment (440 °C / 12h + 472 °C / 24h) after hot isostatic pressing (HIP), and then hot compression tests are carried out for getting the stress-strain relationship under different forming conditions. Anti-extrusion process for the cylinder is improved including changing the shape of mould and billet, and numerical simulation is used for researching the anti-extrusion process. According to the distribution of strain-effective, it can be seen that the improved scheme of anti-extrusion process can get more deformation than the common scheme at the bottom. The result of anti-extrusion experiments shows that the microstructure is evenly distributed across the cylinder under the improved scheme.
Research Progress of Steel Columns Reinforced by Enclosed Reinforced Concrete under Axial Compression with Initial Compressive Load
Authors: Zhou Le , Nie Xiao Mei , Bai Yun Hao
Published: September 2014

With the improvement of requirements for the building, and the effects of various factors for some existing steel structure building during the long-term service process, structural function is damaged, which requires reinforcement for existing structures to meet the requirements of its use of the function. This paper systematically introduces the research and application of steel structure member on strengthening aspects, which is prepared for the research of steel column reinforced by enclosed reinforced concrete under axial compression with initial compressive load. According to development and characteristics of steel columns reinforced by enclosed reinforced concrete under axial compression, this paper analyzes the common working mechanism of steel structure and concrete after reinforcement, and introduces the calculation method and its engineering application in our country.