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University of Michigan (Ross)
(417 results)-
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Iterative Path Optimization for Practical Robot Planning
July 16, 2011, 12:00am PDT
The authors present a hybrid path planner that combines two common methods for robotic planning: a Dijkstra graph search for the minimum distance path through the configuration space and an...
Provided by University of Michigan
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AprilTag: A Robust and Flexible Visual Fiducial System
June 16, 2011, 12:00am PDT
While the use of naturally-occurring features is a central focus of machine perception, artificial features (fiducials) play an important role in creating controllable experiments, ground...
Provided by University of Michigan
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A Passive Solution to the Sensor Synchronization Problem
July 20, 2010, 12:00am PDT
Knowing the time at which sensors acquired data is critical to the proper processing and interpretation of that data, particularly for mobile robots attempting to project sensor data into a...
Provided by University of Michigan
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Graph-Based Segmentation for Colored 3D Laser Point Clouds
July 15, 2010, 12:00am PDT
The authors present an efficient graph-theoretic algorithm for segmenting a colored laser point cloud derived from a laser scanner and camera. Segmentation of raw sensor data is a crucial first...
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A General Purpose Feature Extractor for Light Detection and Ranging Data
November 17, 2010, 12:00am PST
Feature extraction is a central step of processing LIght Detection And Ranging (LIDAR) data. Existing detectors tend to exploit characteristics of specific environments: corners and lines from...
Provided by University of Michigan
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Security in Practice: Security-Usability Chasm
October 5, 2007, 12:00am PDT
Computer systems security area has received increased attention from both academics and in industry. However, recent work indicates that substantial security gaps emerge when systems are deployed,...
Provided by University of Michigan
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Protecting Confidential Data on Personal Computers With Storage Capsules
May 28, 2009, 12:00am PDT
Protecting confidential information is a major concern for organizations and individuals alike, who stand to suffer huge losses if private data falls into the wrong hands. One of the primary...
Provided by University of Michigan
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Quantifying Information Leaks in Outbound Web Traffic
March 12, 2009, 12:00am PDT
As the Internet grows and network bandwidth continues to increase, administrators are faced with the task of keeping confidential information from leaving their networks. Today's network traffic...
Provided by University of Michigan
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CloudAV: N-Version Antivirus in the Network Cloud
May 12, 2008, 12:00am PDT
Antivirus software is one of the most widely used tools for detecting and stopping malicious and unwanted files. However, the long term effectiveness of traditional host-based antivirus is...
Provided by University of Michigan (Ross)
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A Simulation Study of IEEE 802.11 With Optimal Rate Control in Multi-Hop Topologies
July 12, 2010, 12:00am PDT
The most commonly used scheduling scheme to build wireless multi-hop networks is CSMA-CA as off-the shelf IEEE 802.11 radios can be used to easily and cheaply deploy a multi-hop network. However,...
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Scalability and Efficiency of Push-Driven P2PTV Systems
December 3, 2011, 12:00am PST
TeleVision transmitted over IP (IPTV) presents numerous opportunities for users as well as service providers, and has attracted significant interest from industry as well as research communities...
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Impacts of Peer Characteristics on P2PTV Networks Scalability
January 21, 2009, 12:00am PST
A P2PTV system allows users to watch live video streams redistributed by other users via a Peer-To-Peer (P2P) network. In an ideal world, each peer in a P2P network would be able to redistribute...
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On the Scalability of P2P-Based Push-Driven Live Streaming Systems
February 5, 2010, 12:00am PST
TeleVision transmitted over IP (IPTV) presents numerous opportunities for users as well as service providers, and has attracted significant interest from business and research communities in...
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Information Rates of Densely Sampled Gaussian Data: Distributed Vector Quantization and Scalar Quantization With Transforms
December 13, 2011, 12:00am PST
Motivated by the question of the efficiency of dense sensor networks for sampling and encoding spatial random fields, this paper investigates the rates attainable by several lossy schemes for...
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Distributed Source Coding Using Abelian Group Codes: Extracting Performance From Structure
October 17, 2008, 12:00am PDT
In this paper, the authors consider a distributed source coding problem with a joint distortion criterion depending on the sources and the reconstruction. This includes as a special case the...
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On the Achievable Rates of Sources Having a Group Alphabet in a Distributed Source Coding Setting
July 9, 2010, 12:00am PDT
The authors consider the problem of compression via homomorphic encoding of a source having a group alphabet. This is motivated by the problem of distributed function computation, where it is...
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An Achievable Rate Region for Distributed Source Coding With Reconstruction of an Arbitrary Function of the Sources
January 8, 2008, 12:00am PST
A new rate region is presented for a very general framework of distributed source coding where the decoder is interested in lossy reconstruction of an arbitrary function of the sources. The coding...
Provided by University of Michigan
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Transform Coding of Densely Sampled Gaussian Data
January 1, 2012, 12:00am PST
With mean-squared error D as a goal, it is well known that one may approach the Rate-Distortion function R(D) of a non-bandlimited, continuous-time Gaussian source by sampling at a sufficiently...
Provided by University of Michigan
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Error Exponent for Multiple-Access Channels: Upper Bounds
November 4, 2011, 12:00am PDT
The problem of bounding the reliability function of a Multiple-Access Channel (MAC) is studied. Two new upper bounds on the error exponent of a two-user Discrete Memoryless (DM) Multiple-Access...
Provided by University of Michigan
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New Bounds on the Maximal Error Exponent for Multiple-Access Channels
January 14, 2009, 12:00am PST
The problem of bounding the reliability function of a Multiple-Access Channel (MAC) is studied. An upper bound on the minimum Bhattacharyya distance between codeword pairs is derived. For a...
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A New Lower Bound on the Maximal Error Probability for Discrete Memoryless Multiple-Access Channels
January 30, 2008, 12:00am PST
In this paper, a new lower bound for the maximal error probability of a two-user Discrete Memory-less (DM) Multiple-Access Channel (MAC) is derived. This is the first bound of this type that...
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Representation of Correlated Sources Into Graphs for Transmission Over Broadcast Channels
January 1, 2012, 12:00am PST
In this paper, the authors consider the communication problem that involves transmission of correlated sources over broadcast channels. They consider a graph-based framework for this information...
Provided by University of Michigan
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Multiple Descriptions With Feed-Forward: A Single-Letter Achievable Rate Region
December 24, 2007, 12:00am PST
The authors study the two-channel multiple descriptions problem for an i.i.d source, with feed-forward to one or both side-decoders. They derive a single-letter achievable rate-region that...
Provided by University of Michigan
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Building Multistate Cost Models for Dynamic Multidatabase Environments
July 7, 2008, 12:00am PDT
Local cost estimation is essential to global query optimization in a MultiDataBase System (MDBS). The techniques suggested in the literature to develop local cost models in an MDBS are suitable...
Provided by University of Michigan
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Trusted Collaborative Spectrum Sensing for Mobile Cognitive Radio Networks
January 15, 2012, 12:00am PST
Collaborative spectrum sensing is a key technology in Cognitive Radio Networks (CRNs). It is inaccurate if spectrum sensing nodes are malicious. Although mobility is an inherent property of...
Provided by University of Michigan
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Full-System Critical Path Analysis
June 10, 2008, 12:00am PDT
Many interesting workloads today are limited not by CPU processing power but by the interactions between the CPU, memory system, I/O devices, and the complex software that ties all the components...
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You Can Run, But You Can't Hide: Exposing Network Location for Targeted DoS Attacks in Cellular Networks
November 28, 2011, 12:00am PST
An important class of attacks against cellular network infrastructures, i.e., signaling DoS attack, paging channel overload, and channel exhaustion attack, operates by sending low rate data...
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Designing Scalable and Effective Decision Support for Mitigating Attacks in Large Enterprise Networks
July 20, 2011, 12:00am PDT
Managing numerous security vulnerabilities has long been a difficult and daunting task especially due to the complexity, heterogeneity, and various operational constraints of the network. In this...
Provided by University of Michigan
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TOP: Tail Optimization Protocol for Cellular Radio Resource Allocation
September 13, 2010, 12:00am PDT
In 3G cellular networks, the release of radio resources is controlled by inactivity timers. However, the timeout value itself, also known as the tail time, can last up to 15 seconds due to the...
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Full-System Analysis and Characterization of Interactive Smartphone Applications
December 27, 2011, 12:00am PST
Smartphones have recently overtaken PCs as the primary consumer computing device in terms of annual unit shipments. Given this rapid market growth, it is important that mobile system designers and...
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System-Level Implications of Disaggregated Memory
January 13, 2012, 12:00am PST
Recent research on memory disaggregation introduces a new architectural building block - the memory blade - as a cost-effective approach for memory capacity expansion and sharing for an ensemble...
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Atomic Congestion Games on Graphs and Its Applications in Networking
December 28, 2011, 12:00am PST
In this paper, the authors introduce and analyze the properties of a class of game, the Atomic Congestion Game on Graphs (ACGG), which is a generalization of the classical congestion game. In...
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Approximately Optimal Adaptive Learning in Opportunistic Spectrum Access
January 10, 2012, 12:00am PST
In this paper, the authors develop an adaptive learning algorithm which is approximately optimal for an Opportunistic Spectrum Access (OSA) problem with polynomial complexity. In this OSA problem...
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Is Diversity Gain Worth the Pain: Performance Comparison Between Opportunistic Multi-Channel MAC and Single-Channel MAC
January 11, 2012, 12:00am PST
In this paper, the authors analyze the delay performance of an opportunistic multi-channel medium access control scheme and compare it to that of the corresponding single channel MAC scheme. In...
Provided by University of Michigan
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Performance and Convergence of Multi-User Online Learning
December 10, 2010, 12:00am PST
The authors study the problem of allocating multiple users to a set of wireless channels in a decentralized manner when the channel qualities are time-varying and unknown to the users, and...
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Online Algorithms for the Multi-Armed Bandit Problem With Markovian Rewards
July 26, 2010, 12:00am PDT
The authors consider the classical multi-armed bandit problem with Markovian rewards. When played an arm changes its state in a Markovian fashion while it remains frozen when not played. The...
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Dynamic Clock Calibration Via Temperature Measurement
August 23, 2009, 12:00am PDT
The authors study a clock calibration problem for an ultra-low power timer on a sensor node platform. When the sensor is put into sleep mode, this timer is the only thing left running, so power...
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Congestion Games With Resource Reuse and Applications in Spectrum Sharing
March 31, 2009, 12:00am PDT
In this paper, the authors consider an extension to the classical definition of Congestion Games (CG) in which multiple users share the same set of resources and their payoff for using any...
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Spectrum Sharing as Congestion Games
September 17, 2008, 12:00am PDT
A fundamental problem in wireless networking is efficient spectrum sharing. In this paper, the authors study this problem in the context of decentralized multi-user frequency adaptation, with the...
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Competitive Analysis of Opportunistic Spectrum Access Strategies
January 15, 2008, 12:00am PST
The authors consider Opportunistic Spectrum Access (OSA) strategies for a transmitter in a multichannel wireless system, where a channel may or may not be available and the transmitter must...
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New Game Strategies To Create And Capture Value
June 16, 2009, 12:00am PDT
In his book Strategic Innovation (Routledge, 2009), professor Allan Afuah demonstrates the value of "New game" strategies in the face of rapid technological change and increasing globalization....
Provided by University of Michigan (Ross)
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More Competitors = Less Competition
February 17, 2009, 12:00am PST
In a forthcoming research paper in Psychological Science, a series of studies by Stephen Garcia, adjunct assistant professor of management and organizations and assistant professor of psychology...
Provided by University of Michigan (Ross)
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Hedge Fund Manager's Alma Mater Matters
August 15, 2007, 12:00am PDT
Hedge fund investors seeking superior performance are well-advised to select younger, well-educated fund managers who are highly devoted to their jobs, says a University of Michigan business...
Provided by University of Michigan (Ross)
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Anatomy Of A Loyal Customer
August 18, 2008, 12:00am PDT
Heads, hearts, and hands: All play a unique role when it comes to brand loyalty and consumers. "Head loyals" exhibit different behavior in the marketplace than "Heart loyals" or "Hand loyals," and...
Provided by University of Michigan (Ross)
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And In This Corner, Google
July 27, 2009, 12:00am PDT
Google fired another salvo in its ongoing battle with Microsoft recently when it announced plans to offer an operating system based on its Chrome software. The two giants already face off in the...
Provided by University of Michigan (Ross)
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Moving Beyond The Moving Anecdote
May 18, 2009, 12:00am PDT
For years, groups working on poverty-fighting ventures have used stories, anecdotes, and milestone markers to highlight their work and secure funding. Unfortunately, these things don't actually...
Provided by University of Michigan (Ross)
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Closing Deals And Closing Incisions
August 12, 2008, 12:00am PDT
For surgeon Jafar Hasan, MBA '06, the term "closing" took on new meaning recently when he secured funding to commercialize his own medical invention. Surgimatix is the decidedly catchy name of a...
Provided by University of Michigan (Ross)
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To Franchise Or Not To Franchise?
March 17, 2008, 12:00am PDT
For a company pondering the question, "To franchise or not to franchise?" new research from Michigan's Ross School of Business suggests that performance differences between corporate-owned and...
Provided by University of Michigan (Ross)
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More Risk Than Reward
April 17, 2009, 12:00am PDT
Financial market reform is a top-of-mind issue these days, as can be expected after a historic collapse in the global economy. It is particularly top of mind for average Americans whose retirement...
Provided by University of Michigan (Ross)
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Too Many Office Knickknacks? Professional Image May Suffer
September 17, 2007, 12:00am PDT
Family photos, kids' artwork and favorite knickknacks help personalize an office workspace, but too many personal touches may reflect poorly on a worker's professional image, say researchers at...
Provided by University of Michigan (Ross)
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Business Evolution In China
October 21, 2009, 12:00am PDT
Extensive study on industry evolution has produced fairly set models on the ways in which technical innovation drives success and determines winners and losers in the market. A few large,...
Provided by University of Michigan (Ross)
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Effects Of Predictable Tax Liability Variation On Household Labor
May 17, 2010, 12:00am PDT
Economic theory assumes that taxpayers use their true Marginal Tax Rate (MTR) to guide their economic decisions. However, due to complexity of the tax system, taxpayers may incorrectly perceive...
Provided by University of Michigan (Ross)
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Do Emerging Economies Integrate The Internet Better?
April 9, 2008, 12:00am PDT
Don't assume that emerging economies lag developed economies on all business fronts, warns Nigel Melville, assistant professor at Michigan's Ross School of Business. According to his recent study,...
Provided by University of Michigan (Ross)
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Maybe Fine China Really Does Make Food Taste Better
March 18, 2008, 12:00am PDT
Does food served on a paper plate taste worse than the same food served on china? Does a drink served in a glass taste better than the same drink in a plastic cup? For some of us, the answer is...
Provided by University of Michigan (Ross)
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Should Managers Provide Forecasts Of Earnings?
September 24, 2009, 12:00am PDT
Despite the risk of manipulation, management forecasts of earnings in investor communications are beneficial, says a University of Michigan researcher. In a new study commissioned by the...
Provided by University of Michigan (Ross)
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Power Trip: CEOs And Firm Performance
March 4, 2009, 12:00am PST
Despite the public outcry over CEO pay and abuses of authority, powerful chief executives can be good for the bottom line. E. Han Kim, professor of finance at U-M's Ross School of Business, says...
Provided by University of Michigan (Ross)
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ACSI Slip Suggests Tepid Consumer Spending Growth
August 20, 2008, 12:00am PDT
Customer satisfaction continues on a bumpy path without momentum or trend in the second quarter, according to the latest report from the Ross School's American Customer Satisfaction Index. After a...
Provided by University of Michigan (Ross)
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Cause Marketing: Altruism Or Greed?
June 4, 2009, 12:00am PDT
Companies that join with social causes to sell products not only enhance their image, but also improve their bottom line, say researchers at the Ross School of Business. Cause marketing, in which...
Provided by University of Michigan (Ross)
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Overwhelmed, Overloaded
April 1, 2009, 12:00am PDT
Companies invest billions of dollars a year developing leaders by using outside training programs and on-the-job work experience. Previous research and common practice has suggested that the more...
Provided by University of Michigan (Ross)
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Negative Buzz Proves Doubly Damaging
December 21, 2007, 12:00am PST
Companies in the service industry typically spend millions of advertising dollars on the introduction and promotion of new service offerings, in hopes of gaining market share, improving customer...
Provided by University of Michigan (Ross)
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A New Lens For Viewing Team Adaptation
September 12, 2007, 12:00am PDT
Companies have come to rely heavily on downsizing through layoffs, early retirement and buyouts as a quick and relatively easy way to trim costs. But such initiatives often fail to realize their...
Provided by University of Michigan (Ross)
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Election Balance Sheet
October 16, 2008, 12:00am PDT
Business and economic issues are at the forefront of the 2008 presidential election, so voters have to sort through a plethora of complicated issues. To help with that, a panel of Ross professors...
Provided by University of Michigan (Ross)
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Mortgage Crisis: Blame The Bank?
August 28, 2008, 12:00am PDT
Banks have played a big role in the mortgage crisis, not only because they issued loans to suspect borrowers, but because many originated and sold bad loans to other lenders, says a University of...
Provided by University of Michigan (Ross)
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Better Management Through Better HR
June 16, 2009, 12:00am PDT
As the economic downturn rides roughshod over the nation's workforce, human resources professionals face a wide range of new challenges. Whether protecting a collective culture or protecting one's...
Provided by University of Michigan (Ross)
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Note To IT Professionals: Get An MBA!
April 7, 2008, 12:00am PDT
An IT professional with an MBA degree earns 37 percent more on average than one with any other master's degree, according to a study by M.S. Krishnan, professor of business information technology...
Provided by University of Michigan (Ross)
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Into Africa
December 14, 2009, 12:00am PST
African nations soon could surpass India and China to form the next hub for low-cost labor, resources, and production, said experts at the first Africa Business Seminar at Ross. In addition, the...
Provided by University of Michigan (Ross)
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Not Lost In Translation
February 20, 2009, 12:00am PST
Advertisers pushing products in bilingual countries generally focus on how best to turn a phrase or coin a slogan. But they should be spending time determining the actual language that best suits...
Provided by University of Michigan (Ross)
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Stocks Of Bad Companies Often Outperform Those Of Good Ones
February 14, 2008, 12:00am PST
According to a study by Deniz Anginer, a doctoral student in finance at Michigan's Ross School of Business, stocks of admired companies have lower returns, on average, than stocks of despised...
Provided by University of Michigan (Ross)
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Five Keys To Flourishing In Trying Times
December 1, 2009, 12:00am PST
We are in the midst of the most severe recession in the memories of most anyone alive. Many experts estimate that the causes of this recession are more severe than those that created the Great...
Provided by University of Michigan (Ross)
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Positive Leaders Enables Peak Performance
March 8, 2010, 12:00am PST
Positive Leadership enables extraordinarily positive performance by emphasizing what elevates individuals and systems (not only what diminished them), what goes right (not only what goes wrong),...
Provided by University of Michigan (Ross)
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Build On Your Strengths To Strengthen Others
May 5, 2009, 12:00am PDT
You can't walk into a conference these days without bumping into a speaker who is trumpeting the value of building on your strengths. It's easy to understand why this message resonates. "Build on...
Provided by University of Michigan (Ross)
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Paradoxes Ahead In HR's future
May 6, 2009, 12:00am PDT
No one can predict the future. An executive recently said that a business that took 20 years to create could be gone in two years if it cannot adapt quickly to unpredictable changes. Even with...
Provided by University of Michigan (Ross)
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Change, Change, And Change Some More
May 5, 2009, 12:00am PDT
Change happens. It is in the technology that makes our cell phones internet devices and our new seemingly products out of date. It is in changing global economic cycles with simultaneous growth in...
Provided by University of Michigan (Ross)
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The New HR Organization
May 6, 2009, 12:00am PDT
Increasingly diversified businesses require more complex human resources operations, Dave Ulrich contends. Here, the author and consultant breaks down the roles today's HR departments must fulfill...
Provided by University of Michigan (Ross)
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Culture Change From The Outside/In
May 5, 2009, 12:00am PDT
An senior executive called recently and said that he wanted to "Change his culture." When the author asked what he had in mind, he talked about how he felt that the underlying norms, values, and...
Provided by University of Michigan (Ross)
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Fault-Based Attack of RSA Authentication
December 18, 2009, 12:00am PST
Security of a computer system is of utmost importance, since it acts as the repository of the information. For this purpose, hardware as well as software needs to be reliable. This paper studies...
Provided by University of Michigan (Ross)
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Understanding and Abstracting Total Data Center Power
May 28, 2009, 12:00am PDT
Data centers of various small and large organizations are alarmingly aware of the need for energy-efficient power consumption methods that can reduce energy and costs. With the range and...
Provided by University of Michigan (Ross)
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Using a Few Key Elements of SAS DATA Step Code and a Couple of Procedures to Optimize the Observation Length of a Data Set
March 19, 2010, 12:00am PDT
The SAS DATA step supports quite a few statements and functions. Many of these are usually accompanied with acceptable default values. Due to the nature of SAS programming, however, the function...
Provided by University of Michigan (Ross)
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An Introduction to Multiple Imputation of Complex Sample Data Using SAS v9.2
March 19, 2010, 12:00am PDT
This paper presents practical guidance on the proper use of multiple imputation tools in SAS 9.2 and the subsequent analysis of multiple imputed data sets from a complex sample survey data set....
Provided by University of Michigan (Ross)
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Analysis of Survival Data With Recurrent Events Using SAS
March 19, 2010, 12:00am PDT
This paper presents the application of survival analysis methods using SAS/STAT to a large clinical trial, which was designed to test the treatment effect on preventing recurrent stroke and...
Provided by University of Michigan (Ross)
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