University of Bologna

Displaying 1-40 of 51 results

  • White Papers // Jan 2013

    Clone Removal in Java Programs as a Process of Stepwise Unification

    Cloned code is one of the most important obstacles against consistent software maintenance and evolution. Although today's clone detection tools find a variety of clones, they do not offer any advice how to remove such clones. The authors explain the problems involved in finding a sequence of changes for clone...

    Provided By University of Bologna

  • White Papers // Jan 2013

    Towards an Application of Update Propagation on Logic Programs Representing Java Source Code

    Logic programs are now used as a representation of object oriented source code in academic prototypes for about a decade. This representation allows a clear and concise implementation of analyses of the object-oriented source code. The full potential of this approach is far from being explored. In this paper, the...

    Provided By University of Bologna

  • White Papers // Jul 2010

    An Analytical Model of the Service Provisioning Time Within the Harmony Network Service Plane

    Grid computing aims at offering standardized access to heterogeneous and distributed resources for scientific communities. However, in order to support emerging next generation Grid applications with specific Quality of Service requirements, the interconnecting networks have also been considered as first-class allocable Grid resources and have been also taken into account...

    Provided By University of Bologna

  • White Papers // Mar 2009

    A Data Mining Approach to the Monitoring of Public Programs for the Retraining of Unemployed Workers

    A recent report of the Upjohn Institute on a framework for an optimal labour market information (hereafter LMI) system said that "Government must play a major role to ensure there is a public LMI system, which produces reliable and relevant information, and that LMI is disseminated in user friendly ways...

    Provided By University of Bologna

  • White Papers // Oct 2009

    Using the Outdoor Lighting Infrastructure for Wireless Services

    The authors investigate the possibility of using the outdoor lighting system to provide a low-cost, pervasive wide area wireless system. The authors use the outdoor lighting system as the infrastructure for a wireless access, putting a node on each lamp which is connected by high data rate Power Line Communication...

    Provided By University of Bologna

  • White Papers // Mar 2009

    AEqualized: A Novel Routing Algorithm for the Spidergon Network on Chip

    This paper presents the aEqualized routing algorithm: a novel algorithm for the Spidergon Network on Chip. AEqualized combines the well known aFirst and aLast algorithms proposed in literature obtaining an optimized use of the channels of the network. This optimization allows to reduce the number of channels actually implemented on...

    Provided By University of Bologna

  • White Papers // Jan 2010

    Sophisticated Hypertext Functionalities for Software Engineering

    Hypertext functionalities represent a form of the distilled wisdom of the hypermedia community. Given the peculiar nature of the World Wide Web, it is very difficult to successfully propose functionalities that become widely accepted. XMLC is a prototype of an XML browser that, given its modular architecture and general scope,...

    Provided By University of Bologna

  • White Papers // Sep 2009

    E-Government, Accountability, And Performance: A Comparative Analysis Between European Governments

    Given the growing importance of performance and accountability in government, discussion has not been as robust as it should be regarding the role of e-government in understanding these challenges. Much has been claimed and written about the influence of e-government on the modernization and growth of public sector initiatives in...

    Provided By University of Bologna

  • White Papers // Oct 2010

    On Competition And The Strategic Management Of Intellectual Property In Oligopoly

    An innovative firm with private information about its indivisible process innovation chooses strategically whether to apply for a patent with probabilistic validity or rely on secrecy. By doing so, the firm manages its rivals' beliefs about the size of the innovation, and affects the incentives in the product market. A...

    Provided By University of Bologna

  • White Papers // Feb 2011

    Adaptive Approaches for Data Dissemination in Unstructured Networks

    In this paper the authors study the performance of gossip protocols for data dissemination in unstructured networks. More in detail, the goal is to propose a methodology for the assessment of such kind of protocols and to evaluate new methods for data dissemination that are based on adaptive approaches. In...

    Provided By University of Bologna

  • White Papers // Jan 2011

    Server Consolidation in Clouds Through Gossiping

    The success of Cloud computing, where computing power is treated as a utility, has resulted in the creation of many large data centers that are very expensive to build and operate. In particular, the energy bill accounts for a significant fraction of the total operation costs. For this reason a...

    Provided By University of Bologna

  • White Papers // Feb 2010

    QoS Analysis for Web Service Applications: A Survey of Performance-Oriented Approaches From an Architectural Viewpoint

    Building applications from independently developed services is one of the current trends in software development. In this context, the quality - and specifically performance - of a composition of services is a crucial factor for deciding which components must be selected, or to choose whether a given sequence of interactions...

    Provided By University of Bologna

  • White Papers // Feb 2010

    Modeling Self-Organizing, Faulty Peer-to-Peer Systems as Complex Networks

    The theory of complex networks provides effective mathematical tools for analyzing properties of communication systems. This paper discusses an approach for modeling fault-tolerance in self-organizing peer-to-peer overlays. The evolution of the network is characterized by resorting to a failure and attachment rate probabilities, together with equations modeling the protocol that...

    Provided By University of Bologna

  • White Papers // Mar 2009

    Probabilistic Data Integration

    In this paper the authors propose and experimentally evaluate a data integration approach where the uncertainty generated during the comparison and merging of the input data sources is included into the resulting mediated schema, and can be used to provide richer answers to the users. They describe a system implementing...

    Provided By University of Bologna

  • White Papers // Feb 2009

    Log-Concavity Property of the Error Probability With Application to Local Bounds for Wireless Communications

    A clear understanding the behavior of the Error Probability (EP) as a function of Signal-to-Noise Ratio (SNR) and other system parameters is fundamental for assessing the design of digital wireless communication systems. The authors propose an analytical framework based on the log-concavity property of the EP which they prove for...

    Provided By University of Bologna

  • White Papers // Apr 2010

    Multinational Banking In Europe: Financial Stability And Regulatory Implications. Lessons From The Financial Crisis

    This paper examines whether multinational banks have a stabilising or a destabilising role during times of financial distress. With a focus on Europe, it looks at how these banks' foreign affiliates have been faring during the recent financial crisis. It finds that retail and corporate lending of these foreign affiliates...

    Provided By University of Bologna

  • White Papers // Jun 2009

    Reasoning About a Service-Oriented Programming Paradigm

    This paper is about a new way for programming distributed applications: The service-oriented one. It is a concept paper based upon the experience in developing a theory and a language for programming services. The work started some years ago when the authors began to formalize the basic mechanisms of the...

    Provided By University of Bologna

  • White Papers // Jul 2009

    ChOrDa: A Methodology for the Modeling of Business Processes With BPMN

    While it is typical to deal with business processes that start and end inside a single organization, many processes are not constrained inside the walls of a single company. For example, supply chains can be seen as large processes involving suppliers, manufacturers, distributors and retailers. Unfortunately, processes involving many actors...

    Provided By University of Bologna

  • White Papers // Jan 2011

    Tribal Art Market Signs And Signals: Conspicuous Consumption And Market Segmentation

    Does a form of socially relevant conspicuous consumption segment the Tribal Art market? In this paper, the authors address this question presenting a model based on the signaling theory and they test this model empirically using a unique hand-collected dataset, which comprises the worldwide Tribal Art market auctions between 1999...

    Provided By University of Bologna

  • White Papers // Mar 2011

    Forecasting Long-Term Interest Rates With A Dynamic General Equilibrium Model Of The Euro Area: The Role Of The Feedback

    This paper studies the forecasting performance of the general equilibrium model of bond yields of Marzo, S?derstr?m and Zagaglia (2008), where long-term interest rates are an integral part of the monetary transmission mechanism. The model is estimated with Bayesian methods on Euro area data. The author compares the out-of-sample predictive...

    Provided By University of Bologna

  • White Papers // May 2011

    The Formation Of Share Market Prices Under Heterogeneous Beliefs And Common Knowledge

    Financial economic models often assume that investors know (or agree on) the fundamental value of the shares of the firm, easing the passage from the individual to the collective dimension of the financial system generated by the Share Exchange over time. The authors' model relaxes that heroic assumption of one...

    Provided By University of Bologna

  • White Papers // Oct 2009

    Is Competition For FDI Bad For Regional Welfare?

    The authors investigate the impact on regional welfare of policy competition for FDI when a multinational firm can strategically react to differences in statutory corporate tax rates and shift taxable profits to lower-tax jurisdictions. They show that competing governments may have an incentive to tax discriminate between domestic and multinational...

    Provided By University of Bologna

  • White Papers // Sep 2010

    Horizontal And Vertical FDI: A Comparative Analysis Of Technological Determinants

    The paper analyzes the role played by technological determinants, using the approach of National System of Innovation (NSI), in enhancing or hampering Foreign Direct Investments (FDI) with different motivations, namely horizontal and vertical FDI. The empirical analysis is carried out using data relative to the final destination of sales of...

    Provided By University of Bologna

  • White Papers // Dec 2009

    Exports And FDI Motivations: Empirical Evidence From US Foreign Subsidiaries

    The expected indirect benefits Foreign Direct Investments (FDI) are supposed to bring into the host countries are drawn mainly from studies at the microeconomic level. Empirical analyses examine whether FDI may be the source of productivity spillover effect on local firms and a new emerging literature analyses the effect with...

    Provided By University of Bologna

  • White Papers // Aug 2009

    Endogenous Information And Self-insurance In Insurance Markets: A Welfare Analysis

    The authors develop a model where consumers do not have ex-ante private information on their risk but can decide to acquire such information before insurance policy purchase. Adverse selection can arise endogenously in the insurance market. They focus on the case where information has decision-making value: information allows consumers to...

    Provided By University of Bologna

  • White Papers // Jul 2011

    Fee Structure, Financing, And Investment Decisions: The Case Of REITS

    The authors propose a model to show how the fee structure of listed Real Estate Investment Trusts (REITs) can increase instead of decrease Management Company opportunistic behaviors. Distinguishing between performance fees paid on the fund market value and management fees paid either on the Net Asset Value (NAV) or on...

    Provided By University of Bologna

  • White Papers // May 2011

    Distributed Computing in the 21st Century: Some Aspects of Cloud Computing

    The Cloud Computing paradigm has gained considerable attention owing to the notable commercial success of many Cloud service providers. Typically, a Cloud Computing service provides its customers with resources as a utility, using a pay-as-you-go model. Thus, Cloud Computing customers can reduce costs related to the acquisition and management of...

    Provided By University of Bologna

  • White Papers // Apr 2011

    A DRAM Centric NoC Architecture and Topology Design Approach

    Most communication traffic in today's System on Chips (SoC) is DRAM centric. The NoC should be designed to efficiently handle the many-to-one communication pattern, funneling to and from the DRAM controller. In this paper, the authors motivate the use of a separate network for the DRAM traffic and justify the...

    Provided By University of Bologna

  • White Papers // Apr 2010

    The Real Ad-Hoc Multi-Hop Peer-to-Peer (RAMP) Middleware: An Easy-to-Use Support for Spontaneous Networking

    Spontaneous (or opportunistic) networks are multi-hop ad-hoc networks where nodes opportunistically exploit peer-to-peer contacts to share content and available resources in an impromptu way. Even if spontaneous networking has recently received growing interest, there is still the lack of impactful and wide-scale applications fully exploiting its potential. The authors claim...

    Provided By University of Bologna

  • White Papers // Sep 2009

    Social Sharing of Connectivity Resources: Control and Encouragement of Unselfishness in Mobile Environments

    In the last years has clearly emerged the opportunity of extending traditional single-hop wireless technologies for Internet connectivity, by introducing practical effective solutions to dynamically use the best multi-hop heterogeneous paths available at runtime. The authors' primary idea is to enable, via proper, context-aware, and effective middleware, the mass of...

    Provided By University of Bologna

  • White Papers // Feb 2009

    Middleware Solutions for Self-Organizing Multi-Hop Multi-Path Internet Connectivity Based on Bluetooth

    The availability of heterogeneous wireless interfaces and of growing computing resources on widespread portable devices pushes for enabling innovative deployment scenarios where mobile nodes dynamically self-organize to offer Internet connectivity to their peers via dynamically established multi-hop multi-path opportunities. The authors claim the suitability of novel, mobility-aware, and application-layer middleware...

    Provided By University of Bologna

  • White Papers // Jan 2009

    A Novel Distributed Interference Mitigation Technique Using Power Planning

    This paper introduces a new method for distributed interference mitigation in full spectral-reuse OFDMA cellular networks. This considers the use of pre-defined frequency-domain power profiles helping make the interference more predictable across the subcarriers. The authors propose a method for computing the power profiles so as to maximize the capacity...

    Provided By University of Bologna

  • White Papers // Jun 2011

    Parallel and Distributed Simulation From Many Cores to the Public Cloud

    In this paper, the authors will firstly review some basic simulation concepts and then introduce the parallel and distributed simulation techniques in view of some new challenges of today and tomorrow. More in particular, in the last years there has been a wide diffusion of much cores architecture and they...

    Provided By University of Bologna

  • White Papers // Jan 2011

    Data Broadcasting Algorithms on Error-Prone Wireless Channels

    Broadcasting is an efficient and scalable way of transmitting data over wireless channels to an unlimited number of clients. In this paper the problem of allocating data to multiple channels is studied, assuming flat data scheduling per channel and the presence of unrecoverable channel transmission errors. The objective is that...

    Provided By University of Bologna

  • White Papers // Sep 2011

    Cognitive Cars: Constructing a Cognitive Playground for VANET Research Testbeds

    Simulation today plays a key role in the study and understanding of extremely complex systems, which range from transportation networks to virus spread, and include large-scale Vehicular Ad hoc NETworks (VANETs). Regarding VANET scenarios, until very recently, simulation has represented the only tool with which it was possible to estimate...

    Provided By University of Bologna

  • White Papers // Feb 2009

    On Construction of Moderate-Length LDPC Codes Over Correlated Erasure Channels

    The design of moderate-length erasure correcting Low-Density Parity-Check (LDPC) codes over correlated erasure channels is considered. Although the asymptotic LDPC code design remains the same as for a memoryless erasure channel, robustness to the channel correlation shall be guaranteed for the finite length LDPC code. This further requirement is of...

    Provided By University of Bologna

  • White Papers // Jun 2009

    Effective Spectral Efficiency for Adaptive QAM With Diversity and Pilot Assisted Channel Estimation

    This paper investigates the effects of non-ideal channel state information in adaptive M-ary quadrature amplitude modulation systems with subset diversity. The Slow Adaptive Modulation (SAM) technique, which adapts the modulation parameters to slow channel variations, is considered. With respects to fixed scheme modulation systems, SAM achieves a good gain in...

    Provided By University of Bologna

  • White Papers // Oct 2010

    High-Throughput Random Access Via Codes on Graphs

    Recently, Contention Resolution Diversity Slotted ALOHA (CRDSA) has been introduced as a simple but effective improvement to slotted ALOHA. It relies on MAC burst repetitions and on interference cancellation to increase the normalized throughput of a classic slotted ALOHA access scheme. CRDSA allows achieving a larger throughput than slotted ALOHA,...

    Provided By University of Bologna

  • White Papers // Feb 2010

    Analytical Study of the Outage Probability of ALOHA and CSMA in Bounded Ad Hoc Networks

    The performance of the ALOHA and CSMA protocols is evaluated within a bounded ad hoc network. The authors' network model comprises of packets being distributed in finite space and time according to a 3-D PPP. Upon the formation of each packet, it is transmitted to its intended destination located a...

    Provided By University of Bologna

  • White Papers // Feb 2010

    The Impact of Edge Effects on the Performance of MAC Protocols in Ad Hoc Networks With Fading

    In this paper, the impact of edge effects on the performance of MAC protocols is evaluated. The authors consider a network where packets are distributed in finite space according to a 2-D PPP, while packets arrive in time according to a 1-D PPP. Each transmitter communicates with its own receiver...

    Provided By University of Bologna