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Cornell University
(832 results)-
White Papers
Timing-Based Detection of Packet Forwarding in MANETs
April 9, 2010, 12:00am PDT
In Mobile Ad hoc NETworks (MANETs), timing information is easily available due to the use of a shared medium, even when the traffic is encrypted. This paper addresses how such timing information...
Provided by Cornell University
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White Papers
Multiuser Cognitive Access of Continuous Time Markov Channels: Maximum Throughput and Effective Bandwidth Regions
February 2, 2010, 12:00am PST
The problem of sharing multiple channels owned by primary users with multiple cognitive users is considered. Each primary user transmits on its dedicated channel, and its occupancy is modeled by a...
Provided by Cornell University
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White Papers
A Sensing-Based Cognitive Coexistence Method for Interfering Infrastructure and Ad-Hoc Systems
September 19, 2009, 12:00am PDT
The rapid proliferation of wireless systems makes interference management more and more important. This paper presents a novel cognitive coexistence framework, which enables an infrastructure...
Provided by Cornell University
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White Papers
Cognitive Frequency Hopping Based on Interference Prediction: Theory and Experimental Results
September 25, 2009, 12:00am PDT
Wireless services in the unlicensed bands are proliferating, but frequently face high interference from other devices due to a lack of coordination among heterogeneous technologies. In this paper,...
Provided by Cornell University
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White Papers
Adjoints And Automatic (Algorithmic) Differentiation In Computational Finance
July 10, 2011, 12:00am PDT
Two of the most important areas in computational finance: Greeks and, respectively, calibration, are based on efficient and accurate computation of a large number of sensitivities. This paper...
Provided by Cornell University
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White Papers
Rough Paths In Idealized Financial Markets
May 31, 2011, 12:00am PDT
This paper considers possible price paths of a financial security in an idealized market. Its main result is that the variation index of typical price paths is at most 2; in this sense, typical...
Provided by Cornell University
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White Papers
Is Unlevered Firm Volatility Asymmetric?
June 1, 2009, 12:00am PDT
Asymmetric volatility refers to the stylized fact that stock volatility is negatively correlated to stock returns. Traditionally, this phenomenon has been explained by the financial leverage...
Provided by Cornell University
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White Papers
Correlation Structure And Fat Tails In Finance: A New Mechanism
February 1, 2008, 12:00am PST
Fat tails in financial time series and increase of stocks cross correlations in high volatility periods are puzzling facts that ask for new paradigms. Both points are of key importance in...
Provided by Cornell University
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White Papers
Levels Of Complexity In Financial Markets
February 1, 2008, 12:00am PST
The authors consider different levels of complexity which are observed in the empirical investigation of financial time series. They discuss recent empirical and theoretical work showing that...
Provided by Cornell University
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White Papers
Agent-Based Simulation Of A Financial Market
February 1, 2008, 12:00am PST
This paper introduces an agent-based artificial financial market in which heterogeneous agents trade one single asset through a realistic trading mechanism for price formation. Agents are...
Provided by Cornell University
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Whitepapers
An Agent-Based Framework for Cooperation in Supply Chain
September 4, 2012, 12:00am PDT
Supply Chain coordination has become a critical success factor for Supply Chain management (SCM) and effectively improving the performance of organizations in various industries. Companies are...
Provided by Cornell University
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Whitepapers
Inferring the Underlying Structure of Information Cascades
October 12, 2012, 12:00am PDT
In social networks, information and influence diffuse among users as cascades. While the importance of studying cascades has been recognized in various applications, it is difficult to observe the...
Provided by Cornell University
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Whitepapers
Artex is Another Text Summarizer
October 11, 2012, 12:00am PDT
This paper describes Artex, another algorithm for Automatic Text Summarization. In order to rank sentences, a simple inner product is calculated between each sentence, a document vector (text...
Provided by Cornell University
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Whitepapers
Variable-Length Hill Cipher with MDS Key Matrix
October 6, 2012, 12:00am PDT
The Hill Cipher is a classical symmetric cipher which breaks plaintext into blocks of size and then multiplies each block by an key matrix to yield ciphertext. However, it is well known that the...
Provided by Cornell University
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Whitepapers
Detecting Dense Communities in Large Social and Information Networks with the Core & Peel Algorithm
October 11, 2012, 12:00am PDT
Detecting and characterizing dense subgraphs (tight communities) in social and information networks is an important exploratory tool in social network analysis. Several approaches have been...
Provided by Cornell University
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Whitepapers
Scheduling Resources for Executing a Partial Set of Jobs
October 10, 2012, 12:00am PDT
In this paper, the authors consider the problem of choosing a minimum cost set of resources for executing a specified set of jobs. Each input job is an interval, determined by its start-time and...
Provided by Cornell University
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Whitepapers
Sudoku as a Special Transportation Problem
October 9, 2012, 12:00am PDT
Sudoku is a popular combinatorial puzzle. A new method of solving Sudoku is presented, which involves formulating a puzzle as a special type of transportation problem. This model allows one to...
Provided by Cornell University
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Whitepapers
Local Search Is Better Than Random Assignment for Bounded Occurrence Ordering K-CSPs
October 5, 2012, 12:00am PDT
The authors prove that the Bounded Occurrence Ordering k-CSP Problem is not approximation resistant. They give a very simple local search algorithm that always performs better than the random...
Provided by Cornell University
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Whitepapers
Providing an Object Allocation Algorithm in Distributed Databases Using Efficient Factors
October 5, 2012, 12:00am PDT
Data replication is a common method used to improve the performance of data access in distributed database systems. In this paper, the authors present an Object Replication Algorithm in...
Provided by Cornell University
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Whitepapers
Investigating Decision Support Techniques for Automating Cloud Service Selection
October 6, 2012, 12:00am PDT
The compass of Cloud infrastructure services advances steadily leaving users in the agony of choice. To be able to select the best mix of service offering from an abundance of possibilities, users...
Provided by Cornell University
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Whitepapers
A Map-Reduce Parallel Approach to Automatic Synthesis of Control Software
October 11, 2012, 12:00am PDT
Many Control Systems are indeed Software Based Control Systems, i.e. control systems whose controller consists of control software running on a microcontroller device. This motivates investigation...
Provided by Cornell University
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White Papers
A Minsky Perspective On The Global Recession Of 2009
July 1, 2009, 12:00am PDT
As the U.S. credit crunch of 2007 evolved into a global recession in late 2008 and early 2009, the economic ideas of the late Hyman Minsky received increasing attention on both sides of the...
Provided by Cornell University
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Whitepapers
Location-Based Events Detection on Micro-Blogs
October 15, 2012, 12:00am PDT
The increasing use of social networks generates enormous amounts of data that can be used for various types of analysis. Some of these data have temporal and geographical information, which can be...
Provided by Cornell University
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Whitepapers
Opinion Mining for Relating Subjective Expressions and Annual Earnings in US Financial Statements
October 15, 2012, 12:00am PDT
Financial statements contain quantitative information and manager's subjective evaluation of firm's financial status. Using information released in U.S. 10-K filings. Both qualitative and...
Provided by Cornell University
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Whitepapers
Wireless Network-Coded Four-Way Relaying Using Latin Hyper-Cubes
October 15, 2012, 12:00am PDT
This paper deals with physical layer network-coding for the four-way wireless relaying scenario where four nodes A, B, C and D wish to communicate their messages to all the other nodes with the...
Provided by Cornell University
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Whitepapers
The Limitation of Random Network Coding
October 9, 2012, 12:00am PDT
It is already known that in multicast (single source, multiple sinks) network, random linear network coding can achieve the maximum flow upper bound. In this paper, the authors investigate how...
Provided by Cornell University
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Whitepapers
Online Computation of Sparse Representations of Time Varying Stimuli Using a Biologically Motivated Neural Network
October 13, 2012, 12:00am PDT
Natural stimuli are highly redundant, possessing significant spatial and temporal correlations. While sparse coding has been proposed as an efficient strategy employed by neural systems to encode...
Provided by Cornell University
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Whitepapers
A Flexible Mixed Integer Programming Framework for Nurse Scheduling
October 12, 2012, 12:00am PDT
In this paper, a nurse-scheduling model is developed using mixed integer programming model. It is deployed to a general care ward to replace and automate the current manual approach for...
Provided by Cornell University
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Whitepapers
Classification Of Heterogeneous Operating System
September 12, 2012, 12:00am PDT
Operating system is a bridge between system and user. An Operating System (OS) is a software program that manages the hardware and software resources of a computer. The OS performs basic tasks,...
Provided by Cornell University
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Whitepapers
Fast Packed String Matching for Short Patterns
February 9, 2012, 12:00am PST
Searching for all occurrences of a pattern in a text is a fundamental problem in computer science with applications in many other fields, like natural language processing, information retrieval...
Provided by Cornell University
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Whitepapers
Predicting Group Evolution in the Social Network
October 18, 2012, 12:00am PDT
Social communities are important components of entire societies, analyzed by means of the social network concept. Their immanent feature is continuous evolution over time. If user's know how...
Provided by Cornell University
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Whitepapers
Graph-Coupled HMMs for Modeling the Spread of Infection
June 28, 2012, 12:00am PDT
The authors develop Graph-Coupled Hidden Markov Models (GCHMMs) for modeling the spread of infectious disease locally within a social network. Unlike most previous research in epidemiology, which...
Provided by Cornell University
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Whitepapers
Contrasting Multiple Social Network Autocorrelations for Binary Outcomes, with Applications to Technology Adoption
October 15, 2012, 12:00am PDT
The rise of socially targeted marketing suggests that decisions made by consumers can be predicted not only from their personal tastes and characteristics, but also from the decisions of people...
Provided by Cornell University
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Whitepapers
Secure Abstraction with Code Capabilities
October 19, 2012, 12:00am PDT
The authors propose embedding executable code fragments in cryptographically protected capabilities to enable flexible discretionary access control in cloud-like computing infrastructures. They...
Provided by Cornell University
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Whitepapers
Secure Electronic Lock Using Pic 16f628a Microcontroller
September 21, 2012, 12:00am PDT
The proposed system implements an electronic embedded lock that provides a great benefit over a traditional lock, which uses only a manual key. If in case, the key is lost or stolen then anyone...
Provided by Cornell University
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Whitepapers
Coordination in Network Security Games: a Monotone Comparative Statics Approach
August 20, 2012, 12:00am PDT
Malicious softwares or malwares for short have become a major security threat. While originating in criminal behavior, their impacts are also influenced by the decisions of legitimate end users....
Provided by Cornell University
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Whitepapers
Securing Speech in GSM Networks Using DES with Random Permutation and Inversion Algorithm
July 1, 2012, 12:00am PDT
Global System for Mobile Communications (GSM) is one of the most commonly used cellular technologies in the world. One of the objectives in mobile communication systems is the security of the...
Provided by Cornell University
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Whitepapers
Securing Instrumented Environments Over Content-Centric Networking: The Case of Lighting Control
August 7, 2012, 12:00am PDT
Instrumented environments, such as modern Building Automation Systems (BAS), are becoming commonplace and are increasingly interconnected with (and sometimes by) enterprise networks and the...
Provided by Cornell University
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Whitepapers
JASF: Jasta Security Framework
August 6, 2012, 12:00am PDT
JASM is a model designed to increase the security level in authentication systems. It uses IP Address of the user in the authentication process to enhance the security. On-line security plays a...
Provided by Cornell University
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Whitepapers
Enhancing Data Security in Medical Information System Using the Watermarking Techniques and Oracle SecureFile LOBs
July 1, 2012, 12:00am PDT
In this paper, the authors propose an efficient digital watermarking scheme to strengthen the security level already present in the database management system and to avoid illegal access to...
Provided by Cornell University
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White Papers
Performance Analysis of Sequential Method for Handover in Cognitive Radio Networks
January 4, 2012, 12:00am PST
Powerful spectrum handover schemes enable Cognitive Radios (CRs) to use transmission opportunities in primary users' channels appropriately. In this paper, the authors consider the cognitive...
Provided by Cornell University
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White Papers
Near-Optimal Quantization and Linear Network Coding for Relay Networks
March 13, 2012, 12:00am PDT
The authors introduce a discrete network corresponding to any Gaussian wireless network that is obtained by simply quantizing the received signals and restricting the transmitted signals to a...
Provided by Cornell University
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White Papers
Minimum Cost Multicast With Decentralized Sources
March 11, 2012, 12:00am PST
In this paper, the authors study the multisource multicast problem where every sink in a given directed acyclic graph is a client and is interested in a common file. They consider the case where...
Provided by Cornell University
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White Papers
Accomplish the Application Area in Cloud Computing
February 21, 2012, 12:00am PST
In the cloud computing application area of accomplish, the authors find the fact that cloud computing covers a lot of areas are its main asset. At a top level, it is an approach to IT where many...
Provided by Cornell University
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White Papers
Design and Implementation of IEEE 802.15.4 Mac Protocol on FPGA
September 16, 2011, 12:00am PDT
The IEEE 802.15.4 is a wireless standard introduced for low power, low cost wireless communication with moderate data rates. In the next few years, it is expected that Low Rate Wireless Personal...
Provided by Cornell University
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White Papers
Secure and Reliable Routing in Mobile Adhoc Networks
February 1, 2012, 12:00am PST
The growing diffusion of wireless-enabled portable devices and the recent advances in Mobile Ad-hoc NETworks (MANETs) open new scenarios where users can benefit from anywhere and at any time for...
Provided by Cornell University
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White Papers
Optimal Control of End-User Energy Storage
March 8, 2012, 12:00am PST
An increasing number of retail energy markets exhibit price fluctuations and provide customers such as data centers and residential users the opportunity to buy energy at lower than average...
Provided by Cornell University
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White Papers
Analyzing the Performance of Probabilistic Algorithm in Noisy MANETs
August 1, 2010, 12:00am PDT
Probabilistic broadcast has been widely used as a flooding optimization mechanism to alleviate the effect of broadcast storm problem (BSP) in mobile ad hoc networks (MANETs). Many research studies...
Provided by Cornell University
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White Papers
A Comprehensive Approach to WSN-Based ITS Applications: A Survey
October 28, 2011, 12:00am PDT
In order to perform sensing tasks, most current Intelligent Transportation Systems (ITS) rely on expensive sensors, which offer only limited functionality. A more recent trend consists of using...
Provided by Cornell University
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White Papers
Malicious Data Attacks on the Smart Grid
August 1, 2011, 12:00am PDT
Malicious attacks against power systems are investigated, in which an adversary controls a set of meters and is able to alter the measurements from those meters. Two regimes of attacks are...
Provided by Cornell University
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White Papers
Securing Mobile Ad Hoc Networks
January 1, 2012, 12:00am PST
The vision of nomadic computing with its ubiquitous access has stimulated much interest in the Mobile Ad Hoc NETworking (MANET) technology. Those infrastructureless, self-organized networks that...
Provided by Cornell University
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White Papers
Group-Decodable Space-Time Block Codes With Code Rate > 1
November 18, 2010, 12:00am PST
High-rate space-time block codes (STBC with code rate > 1) in Multi-Input Multi-Output (MIMO) systems are able to provide both spatial multiplexing gain and diversity gain, but have high Maximum...
Provided by Cornell University
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White Papers
Stability of Networks Under General File Size Distribution With Alpha Fair Rate Allocation
September 18, 2009, 12:00am PDT
Convex optimization has been widely used to model bandwidth allocation policies among TCP flows in the Internet. When the offered load is less than capacity, stochastic stability of networks using...
Provided by Cornell University
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White Papers
Nearly Optimal Bounds for Distributed Wireless Scheduling in the SINR Model
April 27, 2011, 12:00am PDT
The authors study the wireless scheduling problem in the physically realistic SINR model. More specifically: they are given a set of n links, each a sender-receiver pair. They would like to...
Provided by Cornell University
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White Papers
Wireless MIMO Switching
April 20, 2011, 12:00am PDT
In a generic switching problem, a switching pattern consists of a one-to-one mapping from a set of inputs to a set of outputs (i.e., a permutation). The authors propose and investigate a wireless...
Provided by Cornell University
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White Papers
A Large Family of Multi-Path Dual Congestion Control Algorithms
April 19, 2011, 12:00am PDT
The goal of traffic management is efficiently utilizing network resources via adapting of source sending rates and routes selection. Traditionally, this problem is formulated into a utilization...
Provided by Cornell University
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White Papers
Modeling Network Technology Deployment Rates With Different Network Models
April 6, 2011, 12:00am PDT
With a simple model for how new networking technologies get deployed throughout a network and applying it to different network models, the authors have seen how different network structures and...
Provided by Cornell University
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White Papers
Biometric Authentication Using Nonparametric Methods
August 10, 2010, 12:00am PDT
The physiological and behavioral trait is employed to develop biometric authentication systems. The proposed work deals with the authentication of iris and signature based on minimum variance...
Provided by Cornell University
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White Papers
Top-Down Paradigm in Engineering Software Integration
August 6, 2009, 12:00am PDT
The top-down approach of engineering software integration is considered in this paper. A set of advantages of this approach are presented, by examples. All examples are supplied by open source...
Provided by Cornell University
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White Papers
Mathematical Principles in Software Quality Engineering
March 1, 2010, 12:00am PST
Mathematics has many useful properties for developing of complex software systems. One is that it can exactly describe a physical situation of the object or outcome of an action. Mathematics...
Provided by Cornell University
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White Papers
A Theoretical and Empirical Evaluation of Software Component Search Engines, Semantic Search Engines and Google Search Engine in the Context of COTS-Based Development
January 8, 2012, 12:00am PST
COTS-based development is a component reuse approach promising to reduce costs and risks, and ensure higher quality. The growing availability of COTS components on the Web has concretized the...
Provided by Cornell University
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White Papers
Models of Quantum Computation and Quantum Programming Languages
December 3, 2011, 12:00am PST
The goal of this paper is to provide an introduction to the basic computational models used in quantum information theory. The authors review various models of quantum Turing machine, quantum...
Provided by Cornell University
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White Papers
Managing Communication Latency-Hiding at Runtime for Parallel Programming Languages and Libraries
January 18, 2012, 12:00am PST
This paper introduces a runtime model for managing communication with support for latency-hiding. The model enables non-computer science researchers to exploit communication latency-hiding...
Provided by Cornell University
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White Papers
MyProLang - My Programming Language
October 24, 2008, 12:00am PDT
Modern computer programming languages are governed by complex syntactic rules. They are unlike natural languages; they require extensive manual work and a significant amount of learning and...
Provided by Cornell University
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White Papers
Convergence Analysis of Saddle Point Problems in Time Varying Wireless Systems - Control Theoretical Approach
September 13, 2011, 12:00am PDT
Saddle point problems arise from many wireless applications, and primal-dual iterative algorithms are widely applied to find the saddle points. In the existing literature, the convergence results...
Provided by Cornell University
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White Papers
Wireless Capacity and Admission Control in Cognitive Radio
January 19, 2012, 12:00am PST
The authors give algorithms with constant-factor performance guarantees for several capacity and throughput problems in the SINR model. The algorithms are all based on a novel LP formulation for...
Provided by Cornell University
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White Papers
On the Impact of Energy Dissipation Model on Characteristic Distance in Wireless Networks
November 11, 2011, 12:00am PST
In this paper, the authors investigate the dependency of characteristic distance on energy dissipation model. Both the many-to-one and any-to-any communication paradigm have been presented for...
Provided by Cornell University
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White Papers
Ricean Shadowed Statistical Characterization of Shallow Water Acoustic Channels for Wireless Communications
November 8, 2011, 12:00am PST
In this paper, the statistical behaviour of the shallow water acoustic channel for wireless communications is shown to be well characterized by the Ricean shadowed distribution, which has never...
Provided by Cornell University
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White Papers
Stability of the Max-Weight Protocol in Adversarial Wireless Networks
January 15, 2012, 12:00am PST
In this paper, the authors consider the MAX-WEIGHT protocol for routing and scheduling in wireless networks under an adversarial model. This protocol has received a significant amount of attention...
Provided by Cornell University
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White Papers
Timely Throughput of Heterogeneous Wireless Networks: Fundamental Limits and Algorithms
January 26, 2012, 12:00am PST
Consumer demand for data services over wireless networks has increased dramatically in recent years, fueled both by the success of online video streaming and popularity of video-friendly mobile...
Provided by Cornell University
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White Papers
Design of Wireless Electronic Stethoscope Based on Zigbee
December 22, 2011, 12:00am PST
Heart sound stethoscope is primary stage to access diseases. In this paper design of an electronic stethoscope with the functions of wireless transmission is discussed. This electronic stethoscope...
Provided by Cornell University
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White Papers
Worst-Case Additive Noise in Wireless Networks
February 13, 2012, 12:00am PST
An important classical result in Information Theory states that the Gaussian noise is the worst-case additive noise in point-to-point channels. In this paper, the authors significantly generalize...
Provided by Cornell University
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White Papers
Algorithms for Wireless Capacity
March 2, 2012, 12:00am PST
In this paper, the authors address two basic questions in wireless communication: First, how long does it take to schedule an arbitrary set of communication requests? Second, given a set of...
Provided by Cornell University
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White Papers
A Greedy Link Scheduler for Wireless Networks With Fading Channels
March 9, 2012, 12:00am PST
The authors consider the problem of link scheduling for wireless networks with fading channels, where the link rates are varying with time. Due to the high computational complexity of the...
Provided by Cornell University
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White Papers
A Fully Distributed Algorithm for Throughput Performance in Wireless Networks
March 18, 2012, 12:00am PDT
The authors study link scheduling in wireless networks under stochastic arrival processes of packets, and give an algorithm that achieves stability in the physical (SINR) interference model. The...
Provided by Cornell University
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White Papers
Irida: A Real-Time Wireless Sensor Network Visualization Feedback Protocol
March 19, 2012, 12:00am PDT
In this paper, the authors describe the implementation of a real time visualization and feedback system for Wireless Sensor Network algorithms. The system is based on a fixed hardware testbed,...
Provided by Cornell University
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White Papers
Optimizing the Replay Protection at the Link Layer Security Framework in Wireless Sensor Networks
May 18, 2010, 12:00am PDT
Ensuring communications security in Wireless Sensor Networks (WSNs) is very vital because the security protocols therein, should be devised to work at the link layer. Theoretically, any link layer...
Provided by Cornell University
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White Papers
A Novel Approach for Secure Data Aggregation in Wireless Sensor Networks
September 4, 2010, 12:00am PDT
The Wireless Sensor Networks (WSNs) are composed of resource starved sensor nodes that are deployed to sense, process and communicate vital information to the base station. Due to the stringent...
Provided by Cornell University
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White Papers
Data Gathering Scheme for Wireless Sensor Networks Using a Single Mobile Element
March 15, 2012, 12:00am PDT
In this paper, the authors investigate the problem of gathering the data in wireless sensor network using a single Mobile Element. In particular they consider the case where the data are produced...
Provided by Cornell University
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White Papers
LMEEC: Layered Multi-Hop Energy Efficient Cluster-Based Routing Protocol for Wireless Sensor Networks
April 10, 2012, 12:00am PDT
In this paper, the authors propose LMEEC, a cluster-based routing protocol with low energy consumption for wireless sensor networks. Their protocol is based on a strategy which aims to provide a...
Provided by Cornell University
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