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Nanyang Technological University
(152 results)-
White Papers
3D Visualization and Segmentation of Brain MRI Data
January 16, 2009, 12:00am PST
Automatic segmentation of brain MRI data usually leaves some segmentation errors behind that are to be subsequently removed interactively using computer graphics tools. This interactive removal is...
Provided by Nanyang Technological University
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White Papers
Probe Station Selection for Robust Network Monitoring
October 31, 2009, 12:00am PDT
Probing is a promising approach for network monitoring. An important problem that needs to be addressed while developing probing-based solutions is the selection of probe station nodes. Probe...
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White Papers
Building Latent Growth Models Using PROC CALIS: A Structural Equation Modeling Approach
March 19, 2010, 12:00am PDT
This paper illustrates the structural equation modeling approach of building Latent Growth Models (LGMs) using PROC CALIS. In the past decade, LGM has become one of the commonly used statistical...
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White Papers
Business Process Management (BPM) Standards: A Survey
August 26, 2009, 12:00am PDT
Through the combination of SOA (Service Oriented Architecture) with an intelligent Business Process Management that guaranties the immediate execution of the defined processes in multiple...
Provided by Nanyang Technological University
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White Papers
Multi-paths Routing with Load Balancing for Internet Access in Wireless Mesh Networks
February 1, 2010, 12:00am PST
Wireless Mesh Networks (WMN) has different characteristics compared with the mobile ad hoc networks (MANET). The issue of Internet access with wireless mesh connectivity is a very important issue...
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White Papers
Comparison of Overlay and Peer Models in IP over Optical Networks
December 9, 2008, 12:00am PST
This paper study's the performance of connection establishment of Label Switched Paths (LSPs) under two different interconnection models in IP over optical networks. Authors show that the add/drop...
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White Papers
IPV6 Network Mobility on Ad Hoc Network for Transportation Systems
January 1, 2010, 12:00am PST
The authors introduce the network architecture which consists of fleets of mobile routers interconnected using the at ad hoc routing protocol and access router discovery protocol. This network...
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White Papers
Foreign Institutional Investors And Security Returns: Evidence From Indian Stock Exchanges
June 18, 2008, 12:00am PDT
One of the outstanding features of globalization in the financial services industry is the increased access provided to non-local investors in several major stock markets of the world....
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White Papers
Deriving Value in Digital Media Networks
May 21, 2009, 12:00am PDT
This paper presents a framework for the analyzing revenue distribution in the delivery of digital content such as music, movies, games, books, and news. In such content delivery networks, there...
Provided by Nanyang Technological University
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White Papers
Forecasting Business Cycles In A Small Open Economy: A Dynamic Factor Model For Singapore
April 18, 2008, 12:00am PDT
The authors apply multivariate statistical methods to a large dataset of Singapore's macroeconomic variables and global economic indicators with the objective of forecasting business cycles in a...
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White Papers
Easy Impossibility Proofs for K-Set Agreement in Message Passing Systems
March 21, 2011, 12:00am PDT
Despite of being quite similar agreement problems, consensus and general k-set agreement require surprisingly different techniques for proving the impossibility in asynchronous systems with crash...
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White Papers
Homophonic Coding Design for Communication Systems Employing the Encoding-Encryption Paradigm
December 30, 2010, 12:00am PST
This paper addresses the design of a dedicated homophonic coding for a class of communication systems which, in order to provide both reliability and security, first encode the data before...
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White Papers
Secure Index Coding With Side Information
November 25, 2010, 12:00am PST
The problem of Index Coding with Side Information (ICSI) was introduced by Birk and Kol,. It was motivated by applications such as audio and video-on-demand, and daily newspaper delivery. In these...
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White Papers
SNAP: SNowbAll Multi-Tree Pushing for Peer-to-Peer Media Streaming
September 13, 2010, 12:00am PDT
Given the respective advantages of the two complimentary techniques for peer-to-peer media streaming (namely tree-based push and mesh-based pull), there is a strong trend of combining them into a...
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White Papers
Infinite Families of Optimal Splitting Authentication Codes Secure Against Spoofing Attacks of Higher Order
October 2, 2010, 12:00am PDT
In the standard model of authentication theory, a transmitter wants to send some information to a receiver across an insecure channel while an opponent with access to the channel wants to deceive...
Provided by Nanyang Technological University
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White Papers
Self-Repairing Homomorphic Codes for Distributed Storage Systems
July 31, 2010, 12:00am PDT
Erasure codes provide a storage efficient alternative to replication based redundancy in (networked) storage systems. They however entail high communication overhead for maintenance, when some of...
Provided by Nanyang Technological University
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White Papers
A Light-Weight Mutual Authentication and Key-Exchange Protocol Based on Elliptical Curve Cryptogaphy for Energy-Constrained Devices
April 1, 2010, 12:00am PDT
Wireless devices are characterized by low computational power and memory. Hence security protocols dealing with these devices have to be designed to give minimal computational and memory load. The...
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White Papers
A 60 Ghz Analog Phase Shifter in 65 Nm Bulk CMOS Process
July 1, 2010, 12:00am PDT
A 60 GHz Analog Phase Shifter in 65nm bulk CMOS process has been explored for microwave frequency applications. It is an analog phase shifter with three transistors in the form of an active...
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White Papers
Differential Privacy Via Wavelet Transforms
September 30, 2009, 12:00am PDT
Numerous organizations, like census bureaus and hospitals, maintain large collections of personal information (e.g., census data and medical records). Such data collections are of significant...
Provided by Nanyang Technological University
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White Papers
Making Palm Print Matching Mobile
November 29, 2009, 12:00am PST
With the growing importance of personal identification and authentication in today's highly advanced world where most business and personal tasks are being replaced by electronic means, the need...
Provided by Nanyang Technological University
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White Papers
Speaker Independent Emotion Recognition System - SIERS
April 25, 2008, 12:00am PDT
Most speech emotion recognition system proposed to date uses the Hidden Markov Model (HMM). Such system is compute intensive and would require longer training and testing time that may not be...
Provided by Nanyang Technological University
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White Papers
Real-Time Facial Emotion Recognition System Using Fuzzy Neural Networks
May 16, 2008, 12:00am PDT
This paper presents a real-time computer-based system to recognize human facial emotion using fuzzy neural network approach. The system first locates the human face in an image, and then...
Provided by Nanyang Technological University
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White Papers
ECG Biometric System
April 25, 2008, 12:00am PDT
Researchers have investigated the possibilities of using ECG as a new biometric to perform individual identification. The authors propose the use of conventional 12-lead ECG analysis systems to...
Provided by Nanyang Technological University
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White Papers
A Multi-Objective Memetic Algorithm Based Clustering Method
May 16, 2008, 12:00am PDT
Data clustering is a challenging problem where clustering algorithms are only based on one criterion, which is able to reveal all types of structures presenting in the data. It is unfeasible to...
Provided by Nanyang Technological University
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White Papers
Asia's Sovereign Wealth Funds And Reform Of The Global Reserve System
August 1, 2010, 12:00am PDT
This paper explores the potential contribution of Asia's Sovereign Wealth Funds (SWFs) to the reform of the global foreign exchange reserve system. By diversifying the investment of Asia's huge...
Provided by Nanyang Technological University
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White Papers
Improved Meet-in-the-Middle Cryptanalysis of KTANTAN
April 27, 2011, 12:00am PDT
The authors revisit meet-in-the-middle attacks on block ciphers and recent developments in meet-in-the-middle preimage attacks on hash functions. Despite the presence of a secret key in the block...
Provided by Nanyang Technological University
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White Papers
Cooperative Virtual Machine Management for Multi-Organization Cloud Computing Environment
December 8, 2010, 12:00am PST
In cloud computing, organizations can form the cooperation to share the available resource to reduce the cost. This is referred to as the multi-organization cloud computing environment. In this...
Provided by Nanyang Technological University
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White Papers
DelQue: A Socially-Aware Delegation Query Scheme in Delay Tolerant Networks
October 27, 2010, 12:00am PDT
In Delay Tolerant Networks (DTNs), information search is an important topic, which has not been widely investigated yet. Recently, pervasive and ubiquitous computing scenarios are pushing...
Provided by Nanyang Technological University
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White Papers
A Distributed MAC Scheme Supporting Voice Services in Mobile Ad Hoc Networks
February 18, 2009, 12:00am PST
Future mobile ad hoc networks are expected to support voice traffic. The requirement for small delay and jitter of voice traffic poses a significant challenge for Medium Access Control (MAC) in...
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White Papers
Payoff Allocation of Service Coalition in Wireless Mesh Network: A Cooperative Game Perspective
July 25, 2011, 12:00am PDT
In Wireless Mesh Network (WMN), multiple Service Providers (SPs) can cooperate to share resources (e.g., relay nodes and spectrum), to serve their collective subscribed customers for better...
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White Papers
On Hierarchical Cooperation Formation in Mobile Infostation Networks
July 23, 2011, 12:00am PDT
Mobile infostation networks which achieve content distribution by exploiting the opportunistic contact among Mobile Users (MUs) and Access Points (APs) have attracted a lot of attention in the...
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White Papers
Dynamic Bandwidth Allocation Under Uncertainty in Cognitive Radio Networks
July 26, 2011, 12:00am PDT
The authors consider the problem of dynamic bandwidth allocation among different service classes under uncertainty in cognitive radio networks. In such networks, the secondary users compete for...
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White Papers
Performance Analysis of Cognitive Radio Spectrum Access With Prioritized Traffic
January 27, 2011, 12:00am PST
Dynamic Spectrum Access (DSA) is an important design aspect for the cognitive radio networks. Most of the existing DSA schemes are to govern the unlicensed user (i.e., secondary user) traffic in a...
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White Papers
Optimal Power Allocation for Secondary Users in Cognitive Relay Networks
December 21, 2010, 12:00am PST
The authors consider a Cognitive Relay Network (CRN) where the Secondary Users (SUs) are involved as cooperative relays in a Primary User's (PU) communication. To avoid generating interference to...
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White Papers
A Dynamic Relay Selection Scheme for Mobile Users in Wireless Relay Networks
December 29, 2010, 12:00am PST
Cooperative communication has attracted dramatic attention in the last few years due to its advantage in mitigating channel fading. Despite much effort that has been made in theoretical analysis...
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White Papers
Optimal Power Control in Interference-Limited Cognitive Radio Networks
August 13, 2010, 12:00am PDT
Power control for multiple cognitive radios is investigated for broadcast service under the coverage of primary base station. Multiple secondary broadcasting base stations are assumed to operate...
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White Papers
Maximize Secondary User Throughput Via Optimal Sensing in Multi-Channel Cognitive Radio Networks
July 20, 2010, 12:00am PDT
In a cognitive radio network, the full-spectrum is usually divided into multiple channels. However, due to the hardware and energy constraints, a cognitive user (also called secondary user) may...
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White Papers
Optimal Content Transmission Policy in Publish-Subscribe Mobile Social Networks
July 15, 2010, 12:00am PDT
The authors consider the problem of dynamic content distribution in publish-subscribe mobile social networks. Mobile users subscribe to the content provider. Then, when new content is created, the...
Provided by Nanyang Technological University
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White Papers
Optimal Bandwidth Allocation With Dynamic Service Selection in Heterogeneous Wireless Networks
July 15, 2010, 12:00am PDT
Bandwidth allocation for different service classes in heterogeneous wireless networks is an important issue for service provider in terms of balancing service quality and profit. It is especially...
Provided by Nanyang Technological University
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White Papers
An Opportunistic Spectrum Scheduling Scheme for Multi-Channel Cognitive Radio Networks
May 4, 2010, 12:00am PDT
In this paper, the authors develop an opportunistic spectrum scheduling scheme for cognitive radio networks. In the proposed scheme, the channel status (i.e., whether being occupied by primary...
Provided by Nanyang Technological University
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Whitepapers
Data Insertion & Archiving in Erasure-Coding Based Large-Scale Storage Systems
November 10, 2012, 12:00am PST
Given the vast volume of data that needs to be stored reliably, many data-centers and large-scale file systems have started using erasure codes to achieve reliable storage while keeping the...
Provided by Nanyang Technological University
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Whitepapers
RapidRAID: Pipelined Erasure Codes for Fast Data Archival in Distributed Storage Systems
August 3, 2012, 12:00am PDT
To achieve reliability in distributed storage systems, data has usually been replicated across different nodes. However the increasing volume of data to be stored has motivated the introduction of...
Provided by Nanyang Technological University
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Whitepapers
In-Network Redundancy Generation for Opportunistic Speedup of Data Backup
February 19, 2013, 12:00am PST
Erasure coding is a storage-efficient alternative to replication for achieving reliable data backup in distributed storage systems. During the storage process, traditional erasure codes require a...
Provided by Nanyang Technological University
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Whitepapers
The CORE Storage Primitive: Cross-Object Redundancy for Efficient Data Repair & Access in Erasure Coded Storage
February 21, 2013, 12:00am PST
Erasure codes are an integral part of many distributed storage systems aimed at Big Data, since they provide high fault-tolerance for low overheads. However, traditional erasure codes are...
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Whitepapers
Locally Repairable Codes With Multiple Repair Alternatives
May 15, 2013, 12:00am PDT
Distributed storage systems need to store data redundantly in order to provide some fault-tolerance and guarantee system reliability. Different coding techniques have been proposed to provide the...
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Whitepapers
Decentralized Erasure Coding for Efficient Data Archival in Distributed Storage Systems
October 13, 2012, 12:00am PDT
Distributed storage systems usually achieve fault tolerance by replicating data across different nodes. However, redundancy schemes based on erasure codes can provide a storage-efficient...
Provided by Nanyang Technological University
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Whitepapers
Network Performance Aware MPI Collective Communication Operations in the Cloud
April 28, 2013, 12:00am PDT
In this paper, the authors examine the performance of collective communication operations in Message Passing Interfaces (MPI) in the cloud computing environment. The awareness of network topology...
Provided by Nanyang Technological University
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Whitepapers
Streamforce: Outsourcing Access Control Enforcement for Stream Data to the Clouds
May 28, 2013, 12:00am PDT
As tremendous amount of data being generated everyday from human activity and from devices equipped with sensing capabilities, cloud computing emerges as a scalable and cost-effective platform to...
Provided by Nanyang Technological University
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Whitepapers
On P2P Mechanisms for VM Image Distribution in Cloud Data Centers: Modeling, Analysis and Improvement
August 1, 2012, 12:00am PDT
To provide elastic cloud services with QoS guarantee, it is essential for cloud data centers to provision virtual machines rapidly according to user requests. Due to bandwidth bottleneck of...
Provided by Nanyang Technological University
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Whitepapers
Towards Optimal Deployment of Cloud-Assisted Video Distribution Services
March 20, 2013, 12:00am PDT
For Internet video services, the high fluctuation of user demands in geographically distributed regions results in low resource utilizations of traditional CDN systems. Due to the capability of...
Provided by Nanyang Technological University
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Whitepapers
An Auction Mechanism for Resource Allocation in Mobile Cloud Computing Systems
April 23, 2013, 12:00am PDT
A mobile cloud computing system is composed of heterogeneous services and resources to be allocated by the cloud service provider to mobile cloud users. On one hand, some of these resources are...
Provided by Nanyang Technological University
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Whitepapers
Design of Low Hardware Complexity Filter Banks for Communications Systems Employing Folding Number System
October 27, 2009, 12:00am PDT
In this paper, a new architecture to compute 1-D Discrete Wavelet Transform (DWT) based on Folding Number System (FNS) is introduced. Numbers for FNS are extracted directly from analog input...
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Whitepapers
A CMOS Frequency Divider for 2.4/5GHz WLAN Applications With a Simplified Structure
December 1, 2011, 12:00am PST
In this paper, a dual-band integer-N frequency divider is proposed for 2.4/5.2 GHz multi-standard wireless local area networks. It consists of a multi-modulus imbalance phase switching prescaler...
Provided by Nanyang Technological University
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Whitepapers
Improved Linear Precoding Over Block Diagonalization in Multi-Cell Cooperative Networks
February 23, 2012, 12:00am PST
In downlink multiuser Multiple-Input Multiple-Output (MIMO) systems, Block Diagonalization (BD) is a practical linear pre-coding scheme which achieves the same Degrees of Freedom (DoF) as the...
Provided by Nanyang Technological University
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Whitepapers
Design of Congestion Control Based on Instantaneous Queue Sizes in the Routers
October 27, 2009, 12:00am PDT
Recently, eXplicit Control Protocol (XCP), Rate Control Protocol (RCP), and Adaptive Proportional-Integral Rate Control Protocol (API-RCP) have been proposed for congestion control, with the main...
Provided by Nanyang Technological University
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Whitepapers
An Interference Minimization Game Theoretic Subcarrier Allocation Algorithm for OFDMA-Based Distributed Systems
October 27, 2009, 12:00am PDT
In this paper, the authors consider a scenario where distributed users in an OFDM-based system share the spectrum for transmission. Each network user (player) comprises a pair of transmit and...
Provided by Nanyang Technological University
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Whitepapers
A Real-Time Group Auction System for Efficient Allocation of Cloud Internet Applications
April 2, 2013, 12:00am PDT
Increasing number of the cloud-based Internet applications demands for efficient resource and cost management. This paper proposes a real-time group auction system for the cloud instance market....
Provided by Nanyang Technological University
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Whitepapers
Robust Performance of Spectrum Sensing in Cognitive Radio Networks
December 27, 2012, 12:00am PST
The successful coexistence of Secondary Users (SUs) and Primary Users (PUs) in cognitive radio networks requires SUs to be spectrum aware and know which spectrum bands are occupied by PUs. Such...
Provided by Nanyang Technological University
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Whitepapers
Community Detection in Weighted Networks: Algorithms and Applications
January 30, 2013, 12:00am PST
Community detection is an important issue due to its wide use in designing network protocols such as data forwarding in Delay Tolerant Networks (DTN) and worm containment in Online Social Networks...
Provided by Nanyang Technological University
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Whitepapers
Green-Aware Workload Scheduling in Geographically Distributed Data Centers
September 29, 2012, 12:00am PDT
Renewable (or green) energy, such as solar or wind, has at least partially powered data centers to reduce the environmental impact of traditional energy sources (brown energy with high carbon...
Provided by Nanyang Technological University
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Whitepapers
Wireless Compressive Sensing for Energy Harvesting Sensor Nodes
November 7, 2012, 12:00am PST
The authors consider the scenario in which multiple sensors send spatially correlated data to a Fusion Center (FC) via independent Rayleigh-fading channels with additive noise. Assuming that the...
Provided by Nanyang Technological University
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Whitepapers
Unified Handover Authentication Between Heterogeneous Access Systems in LTE Networks
November 21, 2012, 12:00am PST
To achieve seamless handovers between the Evolved Universal Terrestrial Radio Access Network (E-UTRAN) and other access networks is a challenging task as it requires comprehensive real-time...
Provided by Nanyang Technological University
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Whitepapers
Transmit Optimization With Improper Gaussian Signaling for Interference Channels
July 24, 2012, 12:00am PDT
This paper studies the achievable rates of Gaussian interference channels, when the improper or circularly asymmetric complex Gaussian signaling is applied. For the Gaussian Multiple-Input...
Provided by Nanyang Technological University
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Whitepapers
Harmonic Quorum Systems: Data Management in 2D/3D Wireless Sensor Networks With Holes
April 9, 2012, 12:00am PDT
With the development of ever-expanding Wireless Sensor Networks (WSNs) that are meant to connect physical worlds with human societies, gathering sensory data at a single point is becoming less and...
Provided by Nanyang Technological University
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Whitepapers
DECA: Recovering Fields of Physical Quantities from Incomplete Sensory Data
March 30, 2012, 12:00am PDT
Although, Wireless Sensor Networks (WSNs) are powerful in monitoring physical events, the data collected from a WSN are almost always incomplete if the surveyed physical event spreads over a wide...
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Whitepapers
Algorithm Design for Data Communications in Duty-Cycled Wireless Sensor Networks: A Survey
November 20, 2012, 12:00am PST
Though duty-cycling has long been a critical mechanism for energy conservation in wireless sensor networks, it is only recently that research efforts have been put to design data communication...
Provided by Nanyang Technological University
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Whitepapers
Machine-to-Machine Communications for Home Energy Management System in Smart Grid
January 25, 2011, 12:00am PST
Machine-To-Machine (M2M) communications have emerged as a cutting edge technology for next-generation communications, and are undergoing rapid development and inspiring numerous applications. This...
Provided by Nanyang Technological University
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Whitepapers
A Hierarchical Framework of Dynamic Relay Selection for Mobile Users and Profit Maximization for Service Providers in Wireless Relay Networks
May 24, 2012, 12:00am PDT
Although, extensive research has been carried out on the issue of how to optimally select relays in wireless relay networks, relay selection for mobile users is still a challenging problem due to...
Provided by Nanyang Technological University
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Whitepapers
Variable-Width Channel Allocation for Access Points: A Game-Theoretic Perspective
April 8, 2012, 12:00am PDT
Channel allocation is a crucial concern in variable-width Wireless Local Area Networks (WLANs). This paper aims to obtain the stable and fair non-overlapped variable-width channel allocation for...
Provided by Nanyang Technological University
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Whitepapers
Shorter IBE and Signatures via Asymmetric Pairings
April 24, 2012, 12:00am PDT
The authors present efficient Identity-Based Encryption (IBE) and signature schemes under the Symmetric eXternal Diffie-Hellman (SXDH) assumption in bilinear groups. In both the IBE and the...
Provided by Nanyang Technological University
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The Arithmetic Codex
November 13, 2012, 12:00am PST
The authors introduce the notion of an arithmetic codex, or codex for short. Codices encompass several well-established notions from cryptography (various types of arithmetic secret sharing...
Provided by Nanyang Technological University
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Whitepapers
Cross-Domain Password-Based Authenticated Key Exchange Revisited
July 16, 2012, 12:00am PDT
The authors revisit the problem of cross-domain secure communication between two users belonging to different security domains within an open and distributed environment. Existing approaches...
Provided by Nanyang Technological University
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Whitepapers
Multi-Receiver Homomorphic Authentication Codes for Network Coding
November 3, 2012, 12:00am PDT
The authors investigate a new class of Authenticate-codes (A-codes) that support verification by a group of message recipients in the network coding setting. That is, a sender generates an A-code...
Provided by Nanyang Technological University
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Whitepapers
Finding Lower Bounds on the Complexity of Secret Sharing Schemes by Linear Programming
August 14, 2012, 12:00am PDT
Optimizing the maximum, or average, length of the shares in relation to the length of the secret for every given access structure is a difficult and long-standing open problem in cryptology. Most...
Provided by Nanyang Technological University
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Whitepapers
On the (Im)Plausibility of Constant-Round Public-Coin Straight-Line-Simulatable Zero-Knowledge Proofs
September 4, 2012, 12:00am PDT
In 2001, a breakthrough result by Barak [FOCS 2001] showed how to achieve public-coin Zero-Knowledge (ZK) arguments in constant rounds, a feature known to be impossible using black-box simulation....
Provided by Nanyang Technological University
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Whitepapers
Enabling 3-Share Threshold Implementations for Any 4-bit S-Box
September 3, 2012, 12:00am PDT
Side Channel Attacks (SCA) were introduced in 1997 by Kocher et al. and exploit the fact that while a device is processing data, information about this data is leaked through different channels,...
Provided by Nanyang Technological University
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Whitepapers
The LED Block Cipher
October 13, 2012, 12:00am PDT
The authors present a new block cipher LED. While dedicated to compact hardware implementation, and offering the smallest silicon footprint among comparable block ciphers, the cipher has been...
Provided by Nanyang Technological University
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Whitepapers
SIR Estimation in Hexagonal Cellular Networks With Best Server Policy
February 2, 2012, 12:00am PST
The evaluation of the Signal to Interference Ratio (SIR) in cellular networks is of primary importance for network dimensioning. For static studies, which evaluate cell capacity and coverage, as...
Provided by Nanyang Technological University
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Whitepapers
Hierarchical Competition for Downlink Power Allocation in OFDMA Femtocell Networks
November 6, 2012, 12:00am PST
This paper considers the problem of downlink power allocation in an Orthogonal Frequency-Division Multiple Access (OFDMA) cellular network with macrocells underlaid with femtocells. The...
Provided by Nanyang Technological University
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Whitepapers
Perceptually Motivated Shape Context Which Uses Shape Interiors
December 20, 2012, 12:00am PST
In this paper, the authors identify some of the limitations of current-day shape matching techniques. They provide examples of how contour-based shape matching techniques cannot provide a good...
Provided by Nanyang Technological University
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