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Columbia University
(387 results)-
White Papers
Detecting and Mitigating Denial-of-Service Attacks on Voice Over IP Networks
April 11, 2008, 12:00am PDT
Voice over IP (VoIP) is more susceptible to Denial of Service attacks than traditional data traffic, due to the former's low tolerance to delay and jitter. This paper describes the design of their...
Provided by Columbia University
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White Papers
Brave New World: Pervasive Insecurity of Embedded Network Devices
June 21, 2009, 12:00am PDT
Embedded network devices have become a ubiquitous fixture in the modern home, office as well as in the global communication infrastructure. Devices like routers, NAS appliances, home entertainment...
Provided by Columbia University
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White Papers
Spectrogram: A Mixture-of-Markov-Chains Model for Anomaly Detection in Web Traffic
January 5, 2009, 12:00am PST
This paper presents a new model and sensor framework that offers a favorable balance under this constraint and demonstrates improvement over some existing approaches. Spectrogram is a network...
Provided by Columbia University
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White Papers
Behavior-Profile Clustering for False Alert Reduction in Anomaly Detection Sensors
October 22, 2008, 12:00am PDT
Anomaly Detection (AD) sensors compute behavior profiles to recognize malicious or anomalous activities. The behavior of a host is checked continuously by the AD sensor and an alert is raised when...
Provided by Columbia University
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White Papers
Behavior-Based Network Access Control: A Proof-of-Concept
June 21, 2008, 12:00am PDT
Current Network Access Control (NAC) technologies implement a pre-connect phase where the status of a device is checked against a set of policies before being granted access to a network, and a...
Provided by Columbia University
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White Papers
FLIPS: Hybrid Adaptive Intrusion Prevention
January 1, 2009, 12:00am PST
Intrusion detection systems are fundamentally passive and fail-open. Because their primary task is classification, they do nothing to prevent an attack from succeeding. An Intrusion Prevention...
Provided by Columbia University
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White Papers
Collaborative Distributed Intrusion Detection
January 1, 2009, 12:00am PST
The rapidly increasing array of Internet - scale threats is a pressing problem for every organization that utilizes the network. Organizations often have limited resources to detect, and respond...
Provided by Columbia University
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White Papers
Behavior Profiling of Email
January 1, 2009, 12:00am PST
This paper describes the forensic and intelligence analysis capabilities of the Email Mining Toolkit (EMT) under development at the Columbia Intrusion Detection (IDS) Lab. EMT provides the means...
Provided by Columbia University
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White Papers
Security Assurance for Web Device APIs
November 6, 2008, 12:00am PST
There are many obvious reasons why web developers would like enhanced access to the facilities of the client platform. It is equally obvious that such access represents an enormous potential...
Provided by Columbia University
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White Papers
Interaction With the Environment: Sensor Data Visualization in Outdoor Augmented Reality
September 29, 2009, 12:00am PDT
Proliferating sensor systems provide a rich source of data for understanding the dynamic characteristics of the environment. Visualization of, and interaction with, such data in outdoor augmented...
Provided by Columbia University
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White Papers
Design of the Netmate Network Management System
November 7, 2007, 12:00am PST
The Network management, analysis, and testing environment (Netmate) project addresses research and experimental issues in distributed network management of large, heterogeneous networks. This...
Provided by Columbia University
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White Papers
NETMATE: A Network Management Environment
November 6, 2007, 12:00am PST
The Network Management, Analysis, and Testing Environment (NETMATE) project proposes the design and implementation of a comprehensive data model to address the problems in distributed network...
Provided by Columbia University
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White Papers
Statistics 695V: Data Visualization, Spring 2005
January 1, 2008, 12:00am PST
Many approaches to learning from data today involve the use of complex tools that extent tailor themselves to the patterns of the data, a form of automated learning. But human guidance from data...
Provided by Columbia University
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White Papers
Information Literacy in the Laptop Classroom
April 25, 2008, 12:00am PDT
This paper analyzes the information literacy and research practice in a purposely stratified selection of 10 one-to-one laptop K - 12 schools in California and Maine. Research Design/Data...
Provided by Columbia University
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White Papers
Research Directions for Network Intrusion Recovery
July 25, 2009, 12:00am PDT
One of the most significant unsolved problems for network managers and system administrators is how to repair a network infrastructure after discovering evidence of an extensive compromise. The...
Provided by Columbia University
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White Papers
Automated Data Cleaning Linking Data Manager to Study Coordinator: Error Finding by Variable and Error Fixing by Subject
March 19, 2010, 12:00am PDT
Many researchers using the SAS System software receive data sets with incomplete data or data errors. Data cleaning can become an extremely tedious task for the Coordinators who must return to...
Provided by Columbia University
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White Papers
The Goal-Gradient Hypothesis Resurrected: Purchase Acceleration, Illusionary Goal Progress, And Customer Retention
July 12, 2008, 12:00am PDT
The goal-gradient hypothesis denotes the classic finding from behaviorism that animals expend more effort as they approach a reward. Building on this hypothesis, the authors of this paper generate...
Provided by Columbia University
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White Papers
Financial Models: Why All The Fuss?
December 10, 2009, 12:00am PST
This article covers the discussion in the research symposium "The Quantitative Revolution and the Crisis: How Have Quantitative Financial Models Been Used and Misused" at Columbia Business School...
Provided by Columbia University
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White Papers
The Best Time To Start A Business
June 20, 2008, 12:00am PDT
Becoming an entrepreneur is a very personal decision, and the right time to start a business is when it's right for you. On average, 90 percent of the entrepreneurs surveyed felt it was a good...
Provided by Columbia University
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White Papers
Entrepreneurs: What To Do When You Are Out On A Long, Thin Limb
February 10, 2009, 12:00am PST
How are entrepreneurs weathering the financial storm? Panelists in a recent Master Class on Innovation and the Economy discussed some of the ways entrepreneurs can stay competitive in a down...
Provided by Columbia University
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White Papers
Opportunities In Alternative Energy
November 18, 2009, 12:00am PST
In an event held at Columbia Business School, Warren Buffett and Bill Gates spoke on opportunities in alternative energy. Gates identified energy - including renewable sources, like solar -...
Provided by Columbia University
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White Papers
The Next Great Globalization: How Disadvantaged Nations Can Harness Their Financial Systems To Get Rich
August 4, 2006, 12:00am PDT
In 1960 South Korea was one of the poorest countries in the world, with an average income per person less than that in many countries in sub-Saharan Africa. Today South Korea is a member of the...
Provided by Columbia University
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White Papers
Banking On Recycling
August 8, 2008, 12:00am PDT
Ron Gonen will change the way you think about recycling. He's been honing his strategy ever since the day he convinced his high school of the economic benefits of purchasing reusable metal...
Provided by Columbia University
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White Papers
Tips For Managing A Fast-Growing Company
May 9, 2008, 12:00am PDT
It seems like any entrepreneur would kill for the chance to become an early leader in one of the many fast-growing global industries. Yet fast growth can lead to a wide range of problems, from...
Provided by Columbia University
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White Papers
Lab Work For Your Business Model
April 9, 2010, 12:00am PDT
Management professor Rita McGrath says experimentation must be an integral part of a company's strategy in order to remain competitive in the future. "The level of uncertainty and speed of change...
Provided by Columbia University
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White Papers
Beyond The Five-year Strategic Plan
October 24, 2007, 12:00am PDT
In his new book, Bill Duggan reveals how to cultivate strategic intuition to drive innovation, solve problems and capitalize on unforeseen opportunities. Professor Duggan is the author of three...
Provided by Columbia University
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White Papers
From The Start-Up Frontline
June 19, 2009, 12:00am PDT
For the MBA grad who is launching his or her own venture this year, the current economy is a mixed blessing. "Suddenly every investment banker wants to be an entrepreneur," says Tom Bowen Wright...
Provided by Columbia University
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White Papers
Integrating Conjoint Analysis And Engineering Design
August 3, 2006, 12:00am PDT
The authors describe an approach to integrating conjoint analysis and engineering design. Developed in collaboration with General Motors, the proposed approach can be used for designing products...
Provided by Columbia University
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White Papers
Strategic Competition in Social Entrepreneurship
December 8, 2008, 12:00am PST
This post on the challenges facing social entrepreneurship is drawn from remarks made on October. 23, 2008 at "Leadership for the 21st Century," an interactive training session held at the U.S....
Provided by Columbia University
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White Papers
Reflexive Modeling For An Uncertain Economy
February 3, 2009, 12:00am PST
Models pose a paradox. They hold the key to extraordinary profits but can inflict destructive losses on a bank. Because a model entails a complex perspective on issues that are typically fuzzy and...
Provided by Columbia University
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White Papers
Idea Generation, Creativity, And Incentives
October 13, 2006, 12:00am PDT
Idea generation (ideation) is critical to the design and marketing of new products, to marketing strategy, and to the creation of effective advertising copy. However, there has been relatively...
Provided by Columbia University
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White Papers
The Usefulness Of Accounting Fundamentals And Other Prospectus Information In The Valuation Of IPO Firms
August 16, 2006, 12:00am PDT
The authors of this paper empirically examine the usefulness of (i) forward-looking accounting fundamentals, and (ii) 'Other prospectus information' variables that prior literature suggests are...
Provided by Columbia University
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White Papers
Too Small To Fail?
January 26, 2009, 12:00am PST
Innovative, upstart ventures have a crucial role to play in economic recovery, says Michael A. M. Keehner, who suggests it may be time to give entrepreneurs a stimulus package of their own....
Provided by Columbia University
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White Papers
The Cost Of Latency
March 16, 2010, 12:00am PDT
Modern electronic markets have been characterized by a relentless drive towards faster decision making. Significant technological investments have lead to dramatic improvements in latency, or, the...
Provided by Columbia University
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White Papers
Smartphones and Emerging Markets: A New Technology Revolution?
June 17, 2009, 12:00am PDT
It is no secret that the mobile phone industry is thriving in emerging markets, and that this growth has helped make cell phones the fastest spreading technology in human history. Less known, but...
Provided by Columbia University
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White Papers
The Art Of Choosing
March 26, 2010, 12:00am PDT
This story covers professor Sheena Iyengar's views on strategies for managing choices in an era of seemingly boundless options. Sheena Iyengar is the S. T. Lee Professor of Business in the...
Provided by Columbia University
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White Papers
A Conversation With ... Rita Gunther McGrath, On Obstacles To Innovation-Led Growth
January 26, 2009, 12:00am PST
In this conversation with Ruth Gunther McGrath, faculty director - Columbia University, she covers her views on on Obstacles to Innovation-Led Growth. Ruth maintains that the economic problems are...
Provided by Columbia University
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White Papers
Strategy As Learning
April 22, 2010, 12:00am PDT
Businesses that seek sustainable competitive advantage must set aside the view that strategy is planning and embrace the idea that strategy is learning, says Willie Pietersen - Professor of the...
Provided by Columbia University
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White Papers
Deriving Value From Social Commerce Networks
April 6, 2010, 12:00am PDT
Social commerce is an emerging trend in which sellers are connected in online social networks, and where sellers are individuals instead of firms. This paper examines the economic value...
Provided by Columbia University
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White Papers
Engaging Consumers, Creating Value
August 31, 2009, 12:00am PDT
Findings on value creation and regulatory fit offer far-ranging implications for management, marketing and even mental health. Value - how much importance or worth people place on any given thing...
Provided by Columbia University
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White Papers
Source Prefix Filtering in ROFL
July 26, 2009, 12:00am PDT
Traditional firewalls have the ability to allow or block traffic based on source address as well as destination address and port number. The authors' original ROFL scheme implements firewalling by...
Provided by Columbia University
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White Papers
Privacy Enhanced Access Control for Outsourced Data Sharing
September 21, 2011, 12:00am PDT
Traditional access control models often assume that the entity enforcing access control policies is also the owner of data and re-sources. This assumption no longer holds when data is outsourced...
Provided by Columbia University
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White Papers
A Study of Privacy Setting Errors in an Online Social Network
January 31, 2012, 12:00am PST
Access control policies are notoriously difficult to configure correctly, even people who are professionally trained system administrators experience difficulty with the task. With the increasing...
Provided by Columbia University
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White Papers
Lost in Translation: Improving Decoy Documents Via Automated Translation
April 13, 2012, 12:00am PDT
Detecting insider attacks continues to prove to be one of the most difficult challenges in securing sensitive data. Decoy information and documents represent a promising approach to detecting...
Provided by Columbia University
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White Papers
Fog Computing: Mitigating Insider Data Theft Attacks in the Cloud
March 22, 2012, 12:00am PDT
Cloud computing promises to significantly change the way the people use computers and access and store their personal and business information. With these new computing and communications...
Provided by Columbia University
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Software
EarthObserver 2.2 (iOS)
December 23, 2010, 12:00am PST
Explore your planet as never before with the mobility of EarthObserver. Use your fingertips to travel through terrestrial landscapes and across the ocean floor. Visit frozen icecaps, study...
Provided by Columbia University
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White Papers
KVM for ARM
June 4, 2010, 12:00am PDT
As ARM CPUs grow in performance and ubiquity across phones, netbooks, and embedded computers, providing virtualization support for ARM-based devices is increasingly important. The authors present...
Provided by Columbia University
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White Papers
Linux-CR: Transparent Application Checkpoint-Restart in Linux
July 1, 2010, 12:00am PDT
Application checkpoint-restart is the ability to save the state of a running application so that it can later resume its execution from the time of the checkpoint. Application checkpoint-restart...
Provided by Columbia University
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White Papers
Bypassing Races in Live Applications With Execution Filters
September 24, 2010, 12:00am PDT
Deployed multithreaded applications contain many races because these applications are difficult to write, test, and debug. Worse, the number of races in deployed applications may drastically...
Provided by Columbia University
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White Papers
Finding Concurrency Errors in Sequential Code -OS-level, In-Vivo Model Checking of Process Races
April 15, 2011, 12:00am PDT
While thread races have drawn huge attention from the research community, little has been done for process races, where multiple - possibly sequential - processes access a shared resource, such as...
Provided by Columbia University
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White Papers
Efficient Deterministic Multithreading Through Schedule Relaxation
October 26, 2011, 12:00am PDT
Deterministic MultiThreading (DMT) eliminates many pernicious software problems caused by non-determinism. It works by constraining a program to repeat the same thread interleavings, or schedules,...
Provided by Columbia University
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White Papers
Concurrency Attacks
April 21, 2012, 12:00am PDT
Just as errors in sequential programs can lead to security exploits, errors in concurrent programs can lead to concurrency attacks. Questions such as whether these attacks are real and what...
Provided by Columbia University
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White Papers
The Time-Correlated Update Problem
August 24, 2007, 12:00am PDT
Recent advances in the fields of sensor networks and mobile robotics have provided the means to place monitoring/sensing equipment in an increasingly wide variety of environments - a significant...
Provided by Columbia University
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White Papers
Roomba MADNeT: A Mobile Ad-Hoc Delay Tolerant Network Testbed
November 29, 2007, 12:00am PST
The authors have built a Mobile, Ad-hoc, Delay tolerant, Network Testbed (MADNeT). Their testbed is geared towards enabling the exploration of highly disconnected networks whose nodes must store...
Provided by Columbia University
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White Papers
Embedded Processor Virtualization for Broadband Grid Computing
November 10, 2011, 12:00am PST
The authors implemented and evaluated a heterogeneous system architecture that combines a traditional computer cluster with a broadband network of embedded Set-Top Box (STB) devices to provide a...
Provided by Columbia University
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White Papers
Maximizing GFLOPS-Per-Watt: High-Bandwidth, Low Power Photonic On-Chip Networks
September 20, 2006, 12:00am PDT
As high-performance processors move towards multi-core architectures, packet-switched on-chip networks are gaining wide acceptance as interconnect solutions that can directly address the bandwidth...
Provided by Columbia University
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White Papers
On the Design of a Photonic Network-on-Chip
March 4, 2007, 12:00am PST
Recent remarkable advances in nanoscale siliconphotonic integrated circuitry specifically compatible with CMOS fabrication have generated new opportunities for leveraging the unique capabilities...
Provided by Columbia University
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White Papers
Nanophotonic Optical Interconnection Network Architecture for On-Chip and Off-Chip Communications
January 22, 2008, 12:00am PST
An architecture for an integrated low-power, high-bandwidth optical interconnection network based on microring resonator technology is presented. The layout of the non-blocking network is...
Provided by Columbia University
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White Papers
On-Chip Photonic Communication for High-Performance Multi-Core Processors
October 11, 2008, 12:00am PDT
The quest for high-performance and low-power has brought computer architects to design multi-core architectures where an increasing number of parallel processing cores are integrated on a single...
Provided by Columbia University
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White Papers
An Integrated Four-Phase Buck Converter Delivering 1A/mm2 With 700ps Controller Delay and Network-on-Chip Load in 45-Nm SOI
April 19, 2011, 12:00am PDT
Performance-per-watt is an increasingly important metric for microprocessors as it is now common for the thermal envelope to limit computational performance of an IC. Dynamic Voltage and Frequency...
Provided by Columbia University
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Software
Columbia University Commencement Week 2012 1.0 (iOS)
April 30, 2012, 12:00am PDT
Congratulations Columbia University Class of 2012! Join us incelebrating the remarkable accomplishments of our students during theweek of May 13 - 17, 2012. Download this app to access...
Provided by Columbia University
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White Papers
Performance Evaluation of Resource Allocation Policies for Energy Harvesting Devices
April 12, 2011, 12:00am PDT
The authors focus on resource allocation for energy harvesting devices. They analytically and numerically evaluate the performance of algorithms that determine time fair energy allocation in...
Provided by Columbia University
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White Papers
Toward Practical Private Access to Data Centers Via Parallel ORAM
March 23, 2012, 12:00am PDT
Today, accessing maps, pictures, status updates, and other data from online services is de rigueur, but these accesses may leak private information. Previous work proposed using a secure...
Provided by Columbia University
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White Papers
Selective Gossip
October 13, 2009, 12:00am PDT
Motivated by applications in compression and distributed transform coding, the authors propose a new gossip algorithm called Selective Gossip to efficiently compute sparse approximations of...
Provided by Columbia University
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White Papers
Adaptive Spectrum Sensing for Agile Cognitive Radios
January 15, 2010, 12:00am PST
Vast segments of the frequency spectrum are licensed to specific users for particular applications. These legacy users, however, often under-utilize their designated spectrum segments. Unlicensed...
Provided by Columbia University
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White Papers
Sharpness a Tight Condition for Scalability
May 5, 2008, 12:00am PDT
A distributed system is scalable if the rate at which it completes its computation and communication tasks does not depend on its size. As an example, the scalability of a peer-to-peer application...
Provided by Columbia University
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White Papers
Energy Efficient Offloading of 3G Networks
August 25, 2011, 12:00am PDT
The increase in data consumed by smart-phones is becoming a huge problem for mobile operators. In three years, mobile data traffic in AT&T's network rose 5000%. The US operators invest $50 billion...
Provided by Columbia University
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White Papers
On the Design and Execution of Cyber-Security User Studies: Methodology, Challenges, and Lessons Learned
June 21, 2011, 12:00am PDT
Real-world data collection poses an important challenge in the security field. Insider and masquerader attack data collection poses even a greater challenge. Very few organizations acknowledge...
Provided by Columbia University
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White Papers
Killing the Myth of Cisco IOS Diversity: Recent Advances in Reliable Shellcode Design
June 12, 2011, 12:00am PDT
IOS firmware diversity, the unintended consequence of a complex firmware compilation process, has historically made reliable exploitation of Cisco routers difficult. With approximately 300,000...
Provided by Columbia University
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White Papers
Cross-Domain Collaborative Anomaly Detection: So Far Yet so Close
August 17, 2011, 12:00am PDT
Web applications have emerged as the primary means of access to vital and sensitive services such as online payment systems and databases storing personally identifiable information....
Provided by Columbia University
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White Papers
Defending Embedded Systems With Software Symbiotes
August 9, 2011, 12:00am PDT
A large number of embedded devices on the internet, such as routers and VOIP phones, are typically ripe for exploitation. Little to no defensive technology, such as AV scanners or IDS's, are...
Provided by Columbia University
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White Papers
ALDR: A New Metric for Measuring Effective Layering of Defenses
November 21, 2011, 12:00am PST
Attackers continually innovate and craft attacks that penetrate existing defenses. New security product purchasing decisions are key in order to keep organizations as secure as possible. Current...
Provided by Columbia University
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White Papers
Data Persistence for Zero-Configuration Sensor Networks
November 8, 2006, 12:00am PST
Sensor networks are especially useful in catastrophic or emergency scenarios such as floods, fires, terrorist attacks or earthquakes where human participation may be too dangerous. However, such...
Provided by Columbia University
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White Papers
Generalized Slotted-Aloha in Cooperative, Competitive and Adversarial Environments
January 1, 2012, 12:00am PST
Aloha and its slotted variation are commonly deployed Medium Access Control (MAC) protocols in environments where multiple transmitting devices compete for a medium, yet may have difficulty...
Provided by Columbia University
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White Papers
Throughput and Fairness in Random Access Networks
January 1, 2012, 12:00am PST
This paper present an throughput analysis of log-utility and max-min fairness. Assuming all nodes interfere with each other, completely or partially, log-utility fairness significantly enhances...
Provided by Columbia University
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White Papers
An Analysis of Generalized Slotted-Aloha Protocols
October 24, 2007, 12:00am PDT
Aloha and its slotted variation are commonly deployed Medium Access Control (MAC) protocols in environments where multiple transmitting devices compete for a medium, yet may have difficulty...
Provided by Columbia University
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White Papers
Spreadable Connected Autonomic Networks (SCAN)
March 30, 2008, 12:00am PDT
A Spreadable Connected Autonomic Network (SCAN) is a mobile network that automatically maintains its own connectivity as nodes move. The authors envision SCANs to enable a diverse set of...
Provided by Columbia University
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White Papers
The Shapley Profit for Content, Transit and Eyeball Internet Service Providers
October 7, 2010, 12:00am PDT
Internet Service Providers (ISPs) depend on one another to provide global network services. However, the profit-seeking nature of the ISPs leads to selfish behaviors that result in inefficiencies...
Provided by Columbia University
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White Papers
Impact of Load Sharing on Provisioning Services With Consistency Requirements
January 1, 2012, 12:00am PST
Providers of services such as online auctions must provision servers to respond quickly to users' requests. Assigning each service to its own set of servers can result in some servers being...
Provided by Columbia University
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White Papers
Control Plane Resilience: The Method of Strong Detection
January 1, 2012, 12:00am PST
For the past several decades, work that develops and analyzes network routing protocols has assumed that each network node properly implements the algorithm that establishes routes through the...
Provided by Columbia University
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