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Blue Versus Red: Towards a Model of Distributed Security Attacks

This paper develops a two-sided multiplayer model of security in which attackers aim to deny service and defenders strategize to secure their assets. Attackers benefit from the successful compromise of target systems, however, may suffer penalties for increased attack activities. Defenders weigh the force of an attack against the cost...

Tags: University Of California, Attack, Security

White papers 2009-06-16

MapScale: A Cloud Environment for Scientific Computing

Parallel programming languages have sought out many different means by which many numbers of cores can be utilized for a common goal. Programming languages such as MPI provide a low-level, message passing system, while others such as UPC provide a high-level, shared memory model. Both of these languages and many...

Tags: Environment, Programming Language, Computing, Programming, University Of California, MapReduce, Programming Languages, Development Tools, Software Development, Software/Web Development

White papers 2009-06-12

Realizing Cost and Energy Savings on Campus

Members of the Sustainability Advisory Committee at the University of California, Davis, are always looking for ways to help meet the campus's aggressive goals for reducing energy usage and waste. University of California, wanted to reduce energy and paper use from computer printing on campus leading to reduced greenhouse gas...

Tags: Hewlett-Packard Co., University Of California, Printers, Document Management, Hardware, Peripherals, Enterprise Software, Software, Finance, Managerial Accounting

Case studies 2009-06-01

Spamcraft: An Inside Look at Spam Campaign Orchestration

This paper has presented a detailed study of spam campaign orchestration as observed in the wild. Their investigation was enabled by a long-term infiltration of the Storm botnet, comprising both passive probing and active manipulation of the botnet's C&C traffic. Their study includes over 800,000 spam templates, more than 3...

Tags: Anti-spam, Spamming, E-mail Address, University Of California, Spam, E-mail, Viruses And Worms, Security, Spam And Phishing, Online Communications

White papers 2009-04-24

Social Networks and Contract Enforcement in IT Outsourcing

Most prior research on Information Technology Outsourcing has characterized the dominant governance modes as either 'Formal' or 'Relational,' which rely on stringent assumptions of perfect foresight or about the extent to which one party can punish unilateral deviations by the other. Based on a large dataset of publically announced IT...

Tags: Social Networking, Network, Information Technology, IT Outsourcing, University Of California, Managed Hosting, Outsourcing, It Services, Strategy, It Operations, Business Operations, Outsourcing & Subcontracting, Management

White papers 2009-02-17

An Architecture for Highly Available Wide-Area Service Composition

Service composition provides a flexible way to quickly enable new application functionalities in next generation networks. This paper focus on the scenario where next generation portal providers "Compose" the component services of other providers. Architecture has developed based on an overlay network of service clusters to provide failure-resilient composition of...

Tags: Composition, University Of California, Service Composition, Portals, Web Technology, Internet

White papers 2009-01-01

Ad Hoc Wireless Multicast With Mobility Prediction

An ad hoc wireless network is an infrastructureless network composed of mobile hosts. The primary concerns in ad hoc networks are bandwidth limitations and unpredictable topology changes. Thus, efficient utilization of routing packets and immediate recovery of route breaks are critical in routing and multicasting protocols. A multicast scheme, On-Demand...

Tags: Advertisement, Mobile, Network, Mobility, Multicasting, University Of California, ODMRP, Managed Hosting, Wireless And Mobility

White papers 2009-01-01

Spam Filtering Using a Markov Random Field Model With Variable Weighting Schemas

This paper presents a Markov Random Field model based approach to filter spam. Their approach examines the importance of the neighborhood relationship MRF cliques among words in an email message for the purpose of spam classification. They propose and test several different theoretical bases for weighting schemes among corresponding neighborhood...

Tags: Spam Filtering, University Of California, E-mail, Spam, Construction, Viruses And Worms, Security, Online Communications, Spam And Phishing

White papers 2009-01-01

Using the Triangle Inequality to Accelerate k-Means

The k-means algorithm is by far the most widely used method for discovering clusters in data. The paper shows how to accelerate it dramatically, while still always computing exactly the same result as the standard algorithm. The accelerated algorithm avoids unnecessary distance calculations by applying the triangle inequality in two...

Tags: Algorithm, Inequality, University Of California, K-means Algorithm, Engineering

White papers 2009-01-01

Tribology and Nano-Tribology Problems in Data Storage on Hard Disks

In current "State of the art" disk drives, the flying height between slider and disk is on the order of 10 nm. The flying height will need to be reduced to approximately 3 nm to meet future storage density goals. At a spacing of 3 nm, severe tribological problems will...

Tags: Hard Drive, Data Storage, University Of California, Storage, Hardware

White papers 2008-12-04

Reformulation of XML Queries and Constraints

The authors state and solve the query reformulation problem for XML publishing in a general setting that allows mixed XML and relational storage for the proprietary data and exploits redundancies (materialized views, indexes and caches) to enhance performance. The correspondence between published and proprietary schemas is specified by views in...

Tags: Algorithm, XML Query, University Of California, XML, Engineering, Software/Web Development, Web Development

White papers 2008-10-18

Toward a Uni?ed Ontology of Cloud Computing

Progress of research efforts in a novel technology is contingent on having a rigorous organization of its knowledge domain and a comprehensive understanding of all the relevant components of this technology and their relationships. Cloud Computing is one contemporary technology in which the research community has recently embarked. Manifesting itself...

Tags: University Of California, Cloud Computing, Virtualization, Hardware

White papers 2008-10-13

Sketch-Based Summarization of Ordered XML Streams

XML streams, such as RSS feeds or complex event streams, are becoming increasingly pervasive as they provide the foundation for a wide range of emerging applications. An important problem in this context is the realization of continuous queries that can support on-line monitoring and analysis of the streaming XML data....

Tags: University Of California, XML, Productivity, Software/Web Development, Web Development

White papers 2008-07-14

WG: Requirements for Network Monitoring From an IDS Perspective

Detection of malicious traffic is based on its input data, the information that is coming from network-based monitoring systems. Best detection rates would only be possible by monitoring all data transferred over all network lines in a distributed network. Monitoring and reporting this amount of data are feasible in neither...

Tags: Network, Monitoring, Network Monitoring, University Of California, Networking

White papers 2008-05-20

Nomatic*IM 0.0.5 (Mac)

"Nomatic*IM will provide a service that supports the convenient, and appropriate broadcasting of presence through instant messaging clients. It will provide the flexibility to support multiple IM protocols, IM clients, and operating systems."

Tags: Irvine, Apple Macintosh, IM, University Of California, Instant Messaging, Internet, Online Communications

Software downloads 2008-05-08

On the Spam Campaign Trail

Over the last decade, unsolicited bulk email, or spam, has transitioned from a minor nuisance to a major scourge, adversely affecting virtually every Internet user. Industry estimates suggest that the total daily volume of spam now exceeds 120 billion messages per day; even if the actual figure is 10 times...

Tags: Internet User, University Of California, E-mail, Internet, Online Communications

White papers 2008-04-06

Power Efficiency in High Performance Computing

This paper provides power measurements for various computational loads on the largest scale HPC systems ever involved in such an assessment. This paper demonstrates clearly that, contrary to conventional wisdom, the power consumed while running the High Performance Linpack HPL benchmark is very close to the power consumed by any...

Tags: Measurement, High-performance Computing, High-performance, University Of California, Cloud Computing, Leadership, Performance Management, Management, Human Resources, Workforce Management

White papers 2008-01-28

Uncoordinated Load Balancing and Congestion Games in P2P Systems

In P2P systems, users often have many choices of peers from whom to download their data. Each user cares primarily about its own response time, which depends on how many other users also choose that same peer. This interaction is best modeled as a game among self-interested agents, which is...

Tags: Load Balancing, P2P, University Of California, Games, Peer To Peer (P2P), Network Technology, Personal Technology, Internet, Networking

White papers 2008-01-01

Energy Characterization of the Stargate Sensor Network Gateway

This paper presents a new energy estimation model for sensor network intermediate nodes (i.e. the Crossbow XScale Stargate). Such devices are battery powered and resource constrained and commonly employed as communication, processing, and gateway elements within sensor networks. Understanding and accurately characterizing the energy behavior of such devices is the...

Tags: Gateway Inc., Network, Battery, Sensor, University Of California, Engineering

White papers 2008-01-01

Insecurity in ATM-Based Passive Optical Networks

This paper considers the security of an ITU standard for ATM-based passive optical networks. First, it shows that the standard's encryption algorithm, called churning, has an effective 8-bit key length and thus is trivial to break with exhaustive keysearch. Second, it shows that the authentication mechanisms have significant weaknesses. The...

Tags: Optical Network, University Of California, ATM, Fiber Optics, Optical Networking, Networking, Network Technology, Security, Telecommunications

White papers 2008-01-01