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- A Study on Using Network Flows in Hierarchical QoS Routing
- QoS routing is the process of routing a connection based on the connection's resource requirements. The overhead involved in QoS routing increases with the network size. State aggregation is an important technique that helps to reduce the overhead. This paper proposes a new state aggregation technique based on "Network-flow". The...
- Tags: technique, pennsylvania state university, qos, network, domain, productivity
- White papers 2008-01-01
- Sensor Relocation With Mobile Sensors: Design, Implementation, and Evaluation
- Mobile sensors are useful in many environments because they can move to increase the sensing coverage. This paper presents a mobile sensor prototype in which the Mica2 sensor node is used to control the movement of the robot built with Commercial Off-The-Shelf COTS components. The authors use a sensor relocation...
- Tags: pennsylvania state university, mobile, sensor, advertising & promotion, marketing
- White papers 2007-07-23
- Distributed Software-Based Attestation for Node Compromise Detection in Sensor Networks
- Sensors that operate in an unattended, harsh or hostile environment are vulnerable to compromises because their low costs preclude the use of expensive tamper-resistant hardware. Thus, an adversary may reprogram them with malicious code to launch various insider attacks. Based on verifying the genuineness of the running program, the paper...
- Tags: software, pennsylvania state university, network, sensor, attestation
- White papers 2007-07-19
- Why do we trust established search engines?
- The answer is simple: because we trust well-known brands more than others. Researchers from Penn State University PSU have integrated Google results pages into pages looking like coming from other search engines, such as Yahoo!, MSN Live Search or an in-house PSU search application. Then they asked a panel of...
- Tags: social sciences, computers &, internet
- Blog posts 2007-06-30
- Combinatorics of TCP Reordering
- This paper studies a combinatorial problem motivated by a receiver-oriented model of TCP traffic from, that incorporates information on both arrival times, and the dynamics of packet IDs. It shows that given a buffer sequence B, constructing a sequence A of IDs that belongs to the preimage of B is...
- Tags: pennsylvania state university, packet, tcp, bound, tcp/ip, networking
- White papers 2007-04-10
- Let There Be Light and Broadband Internet
- Home users are in need for broadband communications access, globally. Broadband over power-lines transmission has advanced throughout the last decade, and it is going to be a mature last-mile access in near future. Meanwhile, indoor optical wireless communications optical WiFi through lighting LEDs has been investigated, recently. Suitable channel models...
- Tags: pennsylvania state university, internet, broadband, broadband internet, network technology, telecommunications, networking
- White papers 2007-02-08
- Graceful Operation of Disk Drives Under Thermal Emergencies
- Thermal-aware design of disk-drives is an important concern because high temperatures can cause reliability problems. Hence, Dynamic Thermal Management DTM has been proposed to operate the disk at the average case, rather than the worst case by modulating the activities to avoid thermal emergencies at run time while pushing the...
- Tags: pennsylvania state university, disk, disk drive
- White papers 2007-01-06
- Communication-Aware CPU Management for Consolidated Virtualization-Based Hosting Platforms
- Recent advances in software and architectural support for server virtualization have created interest in using this technology in the design of consolidated hosting platforms. Since virtualization enables easier and faster application migration as well as secure co-location of antagonistic applications, higher degrees of server consolidation are likely to result in...
- Tags: pennsylvania state university, aware, cpu, virtualization, storage management, utility computing, hardware, storage
- White papers 2006-10-17
- Mitigating Attacks on Open Functionality in SMS-Capable Cellular Networks
- The transformation of telecommunications networks from homogeneous closed systems providing only voice services to internet-connected open networks that provide voice and data services presents significant security challenges. For example, recent research illustrated that a carefully crafted DoS attack via text messaging could incapacitate all voice communications in a metropolitan area...
- Tags: pennsylvania state university, sms, attack, text messaging/sms/mms, modems, telephony, cable, internet, cellular phones, telecommunications, security, consumer electronics, personal technology, online communications, hardware, components, networking
- White papers 2006-10-03
- Inventory Service Level Agreements as Coordination Mechanisms: The Effect of Review Periods
- A supplier stocking goods for delivery to a retailer may face a finite-horizon service-level agreement. In this context, the service-level agreement is a commitment by a supplier to achieve a minimum fill-rate over a specified horizon. This kind of service level agreement is an important, but under-studied coordination mechanism. The...
- Tags: pennsylvania state university, sla, supplier, channel management, service level management, marketing, it operations, it service management
- White papers 2006-06-30
- Making IT Work for Municipalities: Building Municipal Wireless Networks
- Wireless technologies create possibilities for ubiquitous, low cost internet access. This possibility has consequently raised questions of who will fund, own, design, deploy and manage these networks and under what terms and conditions. The debates over these questions have resulted in legislation that aims to achieve three objectives: measuring local...
- Tags: pennsylvania state university, financial, network, information technology, wireless network, wireless, wi-fi, financial accounting, telecom & utilities, telecommunications, finance
- White papers 2006-06-20
- Innovative Technologies in a Systems Integration Curriculum: XML and Microsoft Visual Studio .NET
- As a part of an upper-level systems integration course, the author incorporated instruction and projects in current integrative programming technologies, XML and Microsoft Visual Studio.NET. This paper provides an overall background on XML and IDEs and a review of the literature concerning their instructional implementations. A program of basic instruction...
- Tags: microsoft visual studio, pennsylvania state university, curriculum, microsoft visual studio.net, author, microsoft corp., systems integration, programming, microsoft development tools, xml, development tools, .net, it services, enterprise software, software development, software/web development, web development, software
- White papers 2006-03-28
- End-to-End Optimal Algorithms for Integrated QoS, Traffic Engineering, and Failure Recovery
- This paper addresses the problem of optimal Quality of Service QoS, Traffic Engineering TE and Failure Recovery FR in Computer Networks by introducing novel algorithms that only use source inferrable information. More precisely, optimal data rate adaptation and load balancing laws are provided which are applicable to networks where multiple...
- Tags: algorithm, pennsylvania state university, qos, recovery, path, engineering, network technology, networking
- White papers 2006-03-10
- When Mother Nature gets frustrated...
- When you make a choice between two things, be it a place for your next vacation or a decision about your job, one part in you is satisfied while another is frustrated. The same phenomenon exists in nature, where this state of frustration is an important factor of interaction between...
- Tags: pennsylvania state university, atom
- Blog posts 2006-01-24
- Public-Private Partnerships and the Role of State and Federal Legislation in Wireless Municipal Networks
- Current and pending laws will be examined to understand how cities can deploy a wireless broadband network under these regulations. An analysis of municipal facilities and technology expertise illustrates the opportunity for public-private cooperation in wireless deployments. This paper will show that cooperation is beneficial in many cases. Finally, current...
- Tags: pennsylvania state university, network, cooperation, wi-fi, wireless
- White papers 2005-08-31
- System Design Considerations for High Data Rate Communications Over Multi-Wire Overhead Power-Lines
- Broadband power-line communications over multi-wire overheard lines using Orthogonal Frequency Division Multiplexing OFDM is considered in this paper. From earlier investigations, it is known that this channel suffers with multipath fading and frequency selectivity. Nevertheless, the calculated channel capacity limit promises very high data rates over this channel, subject to...
- Tags: pennsylvania state university, powerline, ofdm, wireless
- White papers 2005-07-01
- Project Highlight: GeoCollaborative Crisis Management
- The major natural disasters that occurred in the last few months have shown the importance and necessity for collaborative, international crisis management. Current geoinformation technologies are potentially powerful tools for mitigation, preparation, response, and recovery tasks in crisis situations; however, they fail to support group work and have typically been...
- Tags: pennsylvania state university, crisis situation, crisis management
- White papers 2005-05-18
- Geographic Surveillance and Hotspot Detection for Homeland Security: Cyber Security and Computer Network Diagnostics
- Securing the nation's computer networks from cyber attack is an important aspect of Homeland Security. Project develops diagnostic tools for detecting security attacks, infrastructure failures, and other operational aberrations of computer networks. They have developed models for studying the equilibrium behavior of multidimensional loss systems. The probabilistic finite state automaton...
- Tags: computer network, pennsylvania state university, hotspot, network, network element, cyber security, computer, homeland security, networking, productivity, government
- Case studies
- Interplay of Energy and Performance for Disk Arrays Running Transaction Processing Workloads
- The growth of business enterprises and the emergence of the Internet as a medium for data processing has led to a proliferation of applications that are server-centric. The power dissipation of such servers has a major consequence not only on the costs and environmental concerns of power generation and delivery,...
- Tags: pennsylvania state university, disk, performance, transaction processing, disk array, performance management, human resources, workforce management
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