Massachusetts Institute of Technology

Displaying 361-400 of 491 results

  • White Papers // Jul 2009

    Productivity Differences Between And Within Countries

    The authors document substantial within-country (cross-municipality) differences in incomes for a large number of countries in the Americas. A significant fraction of the within-country differences cannot be explained by observed human capital. They conjecture that the sources of within-country and between-country differences are related. As a first step towards a...

    Provided By Massachusetts Institute of Technology

  • White Papers // Jun 2009

    Programming Manifolds

    Many programming domains involve the manipulation of values distributed through a manifold - examples include sensor networks, smart materials, and biofilms. This paper describes a programming semantics for manifolds based on the amorphous medium abstraction, which places a computational device at every point in the manifold. This abstraction enables the...

    Provided By Massachusetts Institute of Technology

  • White Papers // Jun 2009

    Interactive Visual Histories for Vector Graphics

    Presentation and graphics software enables users to experiment with variations of illustrations. They can revisit recent editing operations using the ubiquitous undo command, but they are limited to sequential exploration. The authors propose a new interaction metaphor and visualization for operation history. While editing, a user can access a history...

    Provided By Massachusetts Institute of Technology

  • White Papers // Jun 2009

    Efficient Cache Attacks on AES, and Countermeasures

    The authors describe several software side-channel attacks based on inter-process leakage through the state of the CPU's memory cache. This leakage reveals memory access patterns, which can be used for cryptanalysis of cryptographic primitives that employ data-dependent table lookups. The attacks allow an unprivileged process to attack other processes running...

    Provided By Massachusetts Institute of Technology

  • White Papers // Jun 2009

    A Distributed Wearable, Wireless Sensor System for Evaluating Professional Baseball Pitchers and Batters

    This paper introduces a compact, wireless, wearable system that measures signals indicative of forces, torques and other descriptive and evaluative features that the human body undergoes during bursts of extreme physical activity (such as during athletic performance). Standard approaches leverage high-speed camera systems, which need significant infrastructure and provide limited...

    Provided By Massachusetts Institute of Technology

  • Webcasts // Jun 2009

    Critical Issues And Grand Challenges

    The panelists use the lens of systems engineering to focus sharply on some signature global challenges in finance, healthcare, energy and IT. The system failure that undid the small but influential financial services industry was a few decades in the making, says one of the presenter.

    Provided By Massachusetts Institute of Technology

  • Webcasts // Jun 2009

    Grand Challenges And Engineering Systems: Inspiring And Educating The Next Generation

    It's a good thing for a world increasingly beset by mammoth challenges that universities are responding with new engineering systems programs. These initiatives, as one of the presenter attests, are swiftly proliferating in the U.S. and abroad to equip students to address such complex issues as health care, sustainable energy,...

    Provided By Massachusetts Institute of Technology

  • White Papers // Jun 2009

    Competition, Market Coverage, and Quality Choice in Interconnected Platforms

    The authors study duopoly competition between two interconnected Internet Service Providers (ISP) that compete in quality and prices for both Content Providers (CP) and consumers. They develop a game theoretic model using a two-sided market framework, where ISP's are modeled as interconnected plat-forms with quality bottlenecks; a consumer on a...

    Provided By Massachusetts Institute of Technology

  • Webcasts // Jun 2009

    Global And Domestic Imbalances: Why Rural China Is The Key

    China owes its astonishing economic expansion not to far-sighted government policy but to hundreds of millions of entrepreneurial peasants. Yasheng Huang's research reveals not only how small-scale rural businesses created China's miracle but how that nation's recovery from the global recession and righting the massive East-West trade imbalance depend on...

    Provided By Massachusetts Institute of Technology

  • Webcasts // Jun 2009

    The Power Of Competition: How To Focus The World's Brains On Your Innovation Challenges

    Cooperation may be making us "A little bit too nice" when it comes to innovation, suggests Fiona Murray. She believes there's nothing like competition for injecting energy into the process of solving key innovation problems, whether in business or society.

    Provided By Massachusetts Institute of Technology

  • White Papers // Jun 2009

    Modeling Radio Networks

    The authors describe a modeling framework and collection of foundational composition results for the study of probabilistic distributed algorithms in synchronous radio networks. Existing results in this setting rely on informal descriptions of the channel behavior and therefore lack easy comparability and are prone to error caused by definition subtleties....

    Provided By Massachusetts Institute of Technology

  • White Papers // Jun 2009

    VPriv: Protecting Privacy in Location-Based Vehicular Services

    A variety of location-based vehicular services are currently being woven into the national transportation infrastructure in many countries. These include usage- or congestion-based road pricing, traffic law enforcement, traffic monitoring, "Pay-as-you-go" insurance, and vehicle safety systems. Although such applications promise clear benefits, there are significant potential violations of the location...

    Provided By Massachusetts Institute of Technology

  • White Papers // Jun 2009

    Wishbone: Profile-Based Partitioning for Sensor net Applications

    The ability to partition sensor network application code across sensor nodes and back-end servers is important for running complex, data-intensive applications on sensor platforms that have CPU, energy, and bandwidth limitations. This paper presents Wishbone, a system that takes a data flow graph of operators and produces an optimal partitioning....

    Provided By Massachusetts Institute of Technology

  • White Papers // Jun 2009

    Wishbone: Profile-Based Partitioning for Sensornet Applications

    The ability to partition sensor network application code across sensor nodes and backend servers is important for running complex, data-intensive applications on sensor platforms that have CPU, energy, and bandwidth limitations. This paper presents Wishbone, a system that takes a dataflow graph of operators and produces an optimal partitioning. With...

    Provided By Massachusetts Institute of Technology

  • White Papers // Jun 2009

    Income And Health Spending: Evidence From Oil Price Shocks

    Health expenditures as a share of GDP have more than tripled over the last half century. A common conjecture is that this is primarily a consequence of rising real per capita income, which more than doubled over the same period. The authors investigate this hypothesis empirically by instrumenting for local...

    Provided By Massachusetts Institute of Technology

  • White Papers // Jun 2009

    Disciplined Agility For Process Control & Automation

    Process Automation systems can impact the operating cost of manufacturing equipment, the safe control of large quantities of energy and the safety of dangerous substances used during manufacturing. The manufacturing segment expects greater automation of larger processes, increased capability of process automation systems, and higher quality of those systems. At...

    Provided By Massachusetts Institute of Technology

  • White Papers // Jun 2009

    Lean Visual Management In An ERP/MES-Controlled Production Cell

    As a company grows, more and more effort is needed to control and coordinate operations. Typically, this is accomplished through an evolving collection of systems and processes, such as an Enterprise Resource Planning (ERP) system, but such systems also influence how a company does business, reviews performance, and communicate results....

    Provided By Massachusetts Institute of Technology

  • White Papers // Jun 2009

    Mitigating The Risk Of A New Workforce By Reducing Rework And Rightsizing On Hand Inventory

    Dramatically increasing the hourly workforce at a rapid pace to support accelerated product demand in an aircraft manufacturing facility in a short amount of time resulted in: increased rework, and increased part damage during assembly. The majority of rework results from simple workmanship mistakes from the new workforce. The approach...

    Provided By Massachusetts Institute of Technology

  • White Papers // Jun 2009

    Understanding Enterprise Behavior Using Hybrid Simulation Of Enterprise Architecture

    Today, the design of business enterprises is much more art than science. The complex structure and behavior of enterprises makes it difficult to untangle cause and effect amidst its components and their relationships. In order for managers to understand how an enterprise's architecture affects its behavior, they need tools and...

    Provided By Massachusetts Institute of Technology

  • White Papers // Jun 2009

    Enabling Cultural Shifts: An Enterprise Approach Toward Lean Thinking

    The Supply Planning Operations team, in a large manufacturing firm, faced a future where their complexity of scope was increasing without an increase in resource levels. As an effort to improve both efficiency and effectively within the organization, they chose to adopt Lean Thinking as a method to streamline and...

    Provided By Massachusetts Institute of Technology

  • White Papers // May 2009

    Gradient Clock Synchronization in Dynamic Networks

    Establishing coordination between participants is at the core of many algorithmic challenges in distributed computing. A fundamental coordination task, and a basic prerequisite for many applications, is achieving a common notion of time. Typically every node in the network has access to a local hardware clock, but the hardware clocks...

    Provided By Massachusetts Institute of Technology

  • White Papers // May 2009

    Oblivious Routing in On-Chip Bandwidth-Adaptive Networks

    Oblivious routing can be implemented on simple router hardware, but network performance suffers when routes become congested. Adaptive routing attempts to avoid hot spots by re-routing flows, but requires more complex hardware to determine and configure new routing paths. The authors propose on-chip bandwidth-adaptive networks to mitigate the performance problems...

    Provided By Massachusetts Institute of Technology

  • White Papers // May 2009

    A Screening Model To Explore Planning Decisions In Automotive Manufacturing Systems Under Demand Uncertainty

    Large-scale, complex engineering systems, as for automotive manufacturing, often require significant capital investment and resources for systems configuration. Furthermore, these systems operate in environments that are constantly changing due to shifts in macroeconomic, market demand and regulations, which can significantly influence systems' performance. It is often very difficult or prohibitively...

    Provided By Massachusetts Institute of Technology

  • Webcasts // May 2009

    Energy Entrepreneurship And Innovation: Today's Challenges, Tomorrow's Opportunities

    There are sample opportunities for new energy entrepreneurs, these panelists agree, but motivation and certain kinds of know how play key roles in bringing new ventures to fruition. Idealism led Christina Lampe-Onnerud to "Go into the energy space" at 23, but "Inertia" surrounding the energy business may intimidate today's entrepreneurs.

    Provided By Massachusetts Institute of Technology

  • White Papers // May 2009

    ATAC: A Manycore Processor With On-Chip Optical Network

    Ever since industry has turned to parallelism instead of frequency scaling to improve processor performance, multicore processors have continued to scale to larger and larger numbers of cores. Some believe that multicores will have 1000 cores or more by the middle of the next decade. However, their promise of increased...

    Provided By Massachusetts Institute of Technology

  • Webcasts // May 2009

    U.S.-Iran Relations

    While Barrack Obama has rejected the Bush administration's harsh stance toward Iran, the authors warn that they're far from the start of fruitful relations, and that achieving real diplomacy will paradoxically require both patience and a sense of urgency.

    Provided By Massachusetts Institute of Technology

  • White Papers // May 2009

    Spectrum Pooling for Next Generation Public Safety Radio Systems

    The Dynamic Spectrum Access (DSA) research and development community is maturing technologies that will enable radios to share RF spectrum much more intensively. Adoption of DSA technologies by the public safety community can better align systems with the future of wireless services more generally and can contribute to making next...

    Provided By Massachusetts Institute of Technology

  • Webcasts // May 2009

    Engineering For The Ecological Age: Lessons From History

    The author, a structural engineer, "Fell in love with archaeology" during college. The senior thesis at Cornell involved a 600-year-old Incan suspension bridge made entirely out of grass. The author learned that this apparently primitive structure owed its astonishing longevity to regular rebuilds by the locals (during a community festival),...

    Provided By Massachusetts Institute of Technology

  • White Papers // May 2009

    Measuring And Understanding Hierarchy As An Architectural Element In Industry Sectors

    Hierarchy is a generic structure in which levels are asymmetrically ordered. In an industry setting, classic supply chains display strict hierarchy, whereas clusters of firms have linkages going in many different directions. The empirical measurement and model analysis together indicate that it is the low transaction specificity that drives down...

    Provided By Massachusetts Institute of Technology

  • Webcasts // Apr 2009

    Ethics And Enlightened Leadership

    His Holiness the Dalai Lama spoke at an inaugural event for a new institute in his name, the Dalai Lama Center for Ethics and Transformative Values. He tempered his provocative ideas about promoting ethics in a secular society with a stream of lively banter.

    Provided By Massachusetts Institute of Technology

  • Webcasts // Apr 2009

    The Future Of Science Journalism

    The authors states that science journalism "Is now, and in the decades ahead, absolutely indispensable." As they confront global warming and health pandemics, science reporting must be sustained, the author says, "In its rightful place, at the top of the profession and in the thick of the national conversation." But...

    Provided By Massachusetts Institute of Technology

  • Webcasts // Apr 2009

    The Future Of Computing

    Wielding numerous analogies for his audience of MIT students, the author makes the case that the next generation of computers, not to mention much of the technology in everyday life, will be built with smaller, simpler parts "Combined in a clever way."

    Provided By Massachusetts Institute of Technology

  • Webcasts // Apr 2009

    Contemplative Dimensions Of Human Experience

    In a mind-stretching talk covering the history of the planet, development of higher-order consciousness, and East-West religious practices, the author claims that humanity is poised to take its next evolutionary step, to the "Furthest levels of human understanding."

    Provided By Massachusetts Institute of Technology

  • Webcasts // Apr 2009

    Media In Transition 6: Summary Perspectives

    At the end of the three-day Media in Transition conference, panelists swap impressions and reactions, offering some notional themes for future symposia. The next conference might wish to "Mobilize and re-territorialize" itself across borders, making itself available in multiple host locations.

    Provided By Massachusetts Institute of Technology

  • White Papers // Apr 2009

    Security Impact Ratings Considered Harmful

    In this paper, the authors question the common practice of assigning security impact ratings to OS updates. Specifically, they present evidence that ranking updates by their perceived security importance, in order to defer applying some updates, exposes systems to significant risk. They argue that OS vendors and security groups should...

    Provided By Massachusetts Institute of Technology

  • Webcasts // Apr 2009

    The Future Of Publishing

    Nostalgia, anxiety and optimism mix in this panel devoted to imagining what lies ahead for the book, as publishing professionals and others discuss the impact of digital technology on the business.

    Provided By Massachusetts Institute of Technology

  • Webcasts // Apr 2009

    New Media, Civic Media

    As old media die, new forms are emerging, but it's not clear they will serve such vital civic functions as "Helping people form publics," as the moderator puts it. The panelists point to promising experiments in "Public Media 2.0," but caution that new media are not guaranteed to shore up...

    Provided By Massachusetts Institute of Technology

  • Webcasts // Apr 2009

    Learning To See In The Dark: The Roots Of Ethical Resistance

    In this complex narrative documenting paradigm shifts in developmental thinking, the author defines the very capacity of the human nature - to have a voice and to communicate - as the grounds of both love and democratic citizenship. Dissecting the roots of healthy ethical resistance, the author weaves together developmental...

    Provided By Massachusetts Institute of Technology

  • Webcasts // Apr 2009

    Global Media

    Just as digital technology has expanded the means of producing media, so has it increased the geographic range new media may travel. Locally generated content can zip around the world in a heartbeat. But, says moderator, "As a society we're in a contradictory state in terms of having greater access...

    Provided By Massachusetts Institute of Technology

  • White Papers // Apr 2009

    Risk Allocation for Multi-Agent Systems Using T??tonnement

    This paper proposes a new market-based distributed planning algorithm for multi-agent systems under uncertainty; called MIRA (Market based Iterative Risk Allocation). In large coordination problems, from power grid management to multi-vehicle missions, multiple agents act collectively in order to optimize the performance of the system, while satisfying mission constraints. These...

    Provided By Massachusetts Institute of Technology

  • White Papers // Jun 2012

    Diversity Versus Channel Knowledge at Finite Block-Length

    The authors study the maximal achievable rate for a given block-length n and block error probability over Rayleigh block-fading channels in the non-coherent setting and in the finite block-length regime. Their results show that for a given block-length and error probability, is not monotonic in the channel's coherence time, but...

    Provided By Massachusetts Institute of Technology

  • White Papers // Jul 2012

    The Adversarial Joint Source-Channel Problem

    This paper introduces the problem of joint source-channel coding in the setup where channel errors are adversarial and the distortion is worst case. Unlike the situation in the case of stochastic source-channel model, the separation principle does not hold in adversarial setup. This surprising observation demonstrates that designing good distortion-correcting...

    Provided By Massachusetts Institute of Technology

  • White Papers // Feb 2012

    On Asynchronous Capacity and Dispersion

    Recently Tchamkerten et al. proposed a mathematical formulation of the problem of joint synchronization and error-correction in noisy channels. A variation of their formulation in this paper considers a strengthened requirement that the decoder estimate both the message and the location of the codeword exactly. It is shown that the...

    Provided By Massachusetts Institute of Technology

  • White Papers // May 2010

    Learning Gaussian Tree Models: Analysis of Error Exponents and Extremal Structures

    The problem of learning tree-structured Gaussian graphical models from independent and identically distributed (i.i.d.) samples is considered. The influence of the tree structure and the parameters of the Gaussian distribution on the learning rate as the number of samples increases is discussed. Specifically, the error exponent corresponding to the event...

    Provided By Massachusetts Institute of Technology

  • White Papers // Mar 2011

    Sample Complexity for Topology Estimation in Networks of LTI Systems

    In this paper, the authors propose a consistent and computationally efficient FFT-based algorithm for inferring the network topology where each node in the network is associated to a widesense stationary, ergodic, Gaussian process. Each edge of the tree network is characterized by a linear, time-invariant dynamical system and additive white...

    Provided By Massachusetts Institute of Technology

  • White Papers // Jul 2011

    The Sender-Excited Secret Key Agreement Model: Capacity Theorems

    The authors consider the fundamental limits of the secret key generation problem when the sources are excited by the sender. In many practical communication settings, the channel may be influenced by the parties involved. Similar to recent works on probing capacity and channels with action-dependent states, their system model captures...

    Provided By Massachusetts Institute of Technology

  • White Papers // Jun 2011

    Rank Minimization Over Finite Fields

    The problem of matrix completion has been well studied in recent years. Essentially, one is given a (small) subset of entries of a low-rank matrix and one is required to estimate all the the remaining entries. In this paper, the authors establish information-theoretic limits in estimating a finite field low-rank...

    Provided By Massachusetts Institute of Technology

  • White Papers // Aug 2009

    Caching in Wireless Networks

    The authors consider the problem of delivering content cached in a wireless network of n nodes randomly located on a square of area n. They provide an inner bound on this caching capacity region, and, in the high path-loss regime, a matching (in the scaling sense) outer bound. For large...

    Provided By Massachusetts Institute of Technology

  • White Papers // Aug 2008

    Secure Transmission With Multiple Antennas: The MIMOME Channel

    The Gaussian wiretap channel model is studied when there are multiple antennas at the sender, the receiver and the eavesdropper and the channel matrices are fixed and known to all the terminals. The secrecy capacity is characterized using a Sato type upper bound. A computable characterization of the capacity is...

    Provided By Massachusetts Institute of Technology

  • White Papers // Feb 2011

    Optimality of Network Coding in Packet Networks

    The authors resolve the question of optimality for a well studied packetized implementation of random linear network coding, called PNC. In PNC, in contrast to the classical memory-less setting, nodes store received information in memory to later produce coded packets that reflect this information. PNC is known to achieve order...

    Provided By Massachusetts Institute of Technology

  • White Papers // Feb 2011

    One Packet Suffices - Highly Efficient Packetized Network Coding with Finite Memory

    Random Linear Network Coding (RLNC) has emerged as a powerful tool for robust high-throughput multicast. Projection analysis, a recently introduced technique, shows that the distributed packetized RLNC protocol achieves (order) optimal and perfectly pipelined information dissemination in many settings. In the original approach to RNLC intermediate nodes code together all...

    Provided By Massachusetts Institute of Technology

  • White Papers // Dec 2011

    Sparse Random Linear Network Codes

    In this paper, the authors presented a randomized approach to linear network coding. In this scheme each intermediate node chooses linear coding coefficients randomly and uniformly from the finite field Fq. This approach can be used in various types of networks. It is shown that the capacity of multicast network...

    Provided By Massachusetts Institute of Technology

  • White Papers // Jul 2009

    ATAC: On-Chip Optical Networks for Multicore Processors

    ˆe trend in modern microprocessor architectures is clear: multicore is here. As silicon resources become increasingly abundant, processor designers are able to place more and more cores on a chip: AMD and Intel have released 2-core chips with 4-core offerings coming soon. Forecasts show that by 2014, processors may contain...

    Provided By Massachusetts Institute of Technology

  • White Papers // Mar 2010

    Secure Network Coding for Multi-Resolution Wireless Video Streaming

    Emerging practical schemes indicate that algebraic mixing of different packets by means of random linear network coding can increase the throughput and robustness of streaming services over wireless networks. However, concerns with the security of wireless video, in particular when only some of the users are entitled to the highest...

    Provided By Massachusetts Institute of Technology

  • White Papers // Aug 2010

    Towards An Integration Of The Lean Enterprise System, Total Quality Management, Six Sigma And Related Enterprise Process Improvement Methods

    The lean enterprise system, total quality management, six sigma, theory of constraints, agile manufacturing, and business process reengineering have been introduced as universally applicable best methods to improve the performance of enterprise operations through continuous process improvement and systemic planned enterprise change. Generally speaking, they represent practice-based, rather than theory-grounded,...

    Provided By Massachusetts Institute of Technology

  • White Papers // Jun 2009

    Disciplined Agility For Process Control & Automation

    Process Automation systems can impact the operating cost of manufacturing equipment, the safe control of large quantities of energy and the safety of dangerous substances used during manufacturing. The manufacturing segment expects greater automation of larger processes, increased capability of process automation systems, and higher quality of those systems. At...

    Provided By Massachusetts Institute of Technology

  • White Papers // Jun 2009

    Lean Visual Management In An ERP/MES-Controlled Production Cell

    As a company grows, more and more effort is needed to control and coordinate operations. Typically, this is accomplished through an evolving collection of systems and processes, such as an Enterprise Resource Planning (ERP) system, but such systems also influence how a company does business, reviews performance, and communicate results....

    Provided By Massachusetts Institute of Technology

  • White Papers // Jun 2009

    Mitigating The Risk Of A New Workforce By Reducing Rework And Rightsizing On Hand Inventory

    Dramatically increasing the hourly workforce at a rapid pace to support accelerated product demand in an aircraft manufacturing facility in a short amount of time resulted in: increased rework, and increased part damage during assembly. The majority of rework results from simple workmanship mistakes from the new workforce. The approach...

    Provided By Massachusetts Institute of Technology

  • White Papers // Jun 2009

    Understanding Enterprise Behavior Using Hybrid Simulation Of Enterprise Architecture

    Today, the design of business enterprises is much more art than science. The complex structure and behavior of enterprises makes it difficult to untangle cause and effect amidst its components and their relationships. In order for managers to understand how an enterprise's architecture affects its behavior, they need tools and...

    Provided By Massachusetts Institute of Technology

  • White Papers // Jun 2009

    Enabling Cultural Shifts: An Enterprise Approach Toward Lean Thinking

    The Supply Planning Operations team, in a large manufacturing firm, faced a future where their complexity of scope was increasing without an increase in resource levels. As an effort to improve both efficiency and effectively within the organization, they chose to adopt Lean Thinking as a method to streamline and...

    Provided By Massachusetts Institute of Technology

  • White Papers // Sep 2008

    Commonality In Complex Product Families: Implications Of Divergence And Lifecycle Offsets

    Commonality, or the sharing of components, processes, technologies, interfaces and/or infrastructure across a product family, represents one of many potential tools for increasing corporate profitability. Industrial interest in commonality is strong, but results appear to be mixed. A rich stream of academic research has examined commonality (typically under terms such...

    Provided By Massachusetts Institute of Technology

  • White Papers // May 2009

    A Screening Model To Explore Planning Decisions In Automotive Manufacturing Systems Under Demand Uncertainty

    Large-scale, complex engineering systems, as for automotive manufacturing, often require significant capital investment and resources for systems configuration. Furthermore, these systems operate in environments that are constantly changing due to shifts in macroeconomic, market demand and regulations, which can significantly influence systems' performance. It is often very difficult or prohibitively...

    Provided By Massachusetts Institute of Technology

  • White Papers // Jul 2009

    Electricity Transmission Policy For America: Enabling A Smart Grid, End-to-End

    This paper proposes a framework of policies to guide the future development of America's electric transmission grid so that the electric power industry will be able to serve more effectively the changing needs of the U.S. economy and society. The paper provides a factual overview of the American electric power...

    Provided By Massachusetts Institute of Technology

  • White Papers // Oct 2010

    Dynamic Pricing Through Sampling Based Optimization

    In this paper the authors develop an approach to dynamic pricing that combines ideas from data-driven and robust optimization to address the uncertain and dynamic aspects of the problem. In this setting, a firm offers multiple products to be sold over a fixed discrete time horizon. Each product sold consumes...

    Provided By Massachusetts Institute of Technology

  • White Papers // May 2010

    Transparent Detection of Computer Malware Using Virtualization

    In this paper, the author explores malware detection using a combination of virtualization- and storage-based intrusion detection techniques. By monitoring disk activity of a virtual machine and correlating that activity to knowledge of the filesystem structure on the virtual machine's disk, an intrusion detection system can react to file changes...

    Provided By Massachusetts Institute of Technology

  • Webcasts // Sep 2008

    Climate Change: Challenges And Opportunities For Business And Society

    Richard Locke explains, sustainability is not an "In vogue concept" that is about environment or climate change. Rather, it is "An incredible opportunity for new business, and for existing enterprise to reinvent their practices". He invites panelists and audience at Convocation sessions to engage in dialog about moving beyond theory...

    Provided By Massachusetts Institute of Technology

  • Webcasts // Sep 2008

    Opportunities In Building More Sustainable Supply Chains

    When a global corporation implements sustainability standards, it pays to work closely with supply chains, as these panelists attest. From his research, Richard M. Locke knows that the traditional methods of achieving decent labor conditions don't work well.

    Provided By Massachusetts Institute of Technology

  • Webcasts // Sep 2008

    Getting Unstuck: How To Promote More Sustainable Practices In Our Organizations

    All that's required to achieve sustainability says Rebecca Henderson, is to clean up your current operations and/or rethink the business. "That's easy," she says. Henderson has spent much of her career trying to help firms embrace and survive such transformations. She and her colleagues have analyzed why businesses get stuck...

    Provided By Massachusetts Institute of Technology

  • White Papers // May 2013

    Efficient Private Information Retrieval Using Secure Hardware

    Existing crypto-based Private Information Retrieval (PIR) schemes are either limited in the set of queries they can per-form, or have prohibitively large performance overheads in making query comparisons. On the other hand, most previous tamper-resistant hardware schemes can support more general queries and have lower performance overheads, but need to...

    Provided By Massachusetts Institute of Technology

  • White Papers // Apr 2012

    Dynamic On-Chip Thermal Optimization for 3D Networks-on-Chip

    The complex thermal behavior prohibits the advancement of 3D VLSI system. Particularly, the high-density through-silicon-via-based 3D integration could lead to ultra-high temperature hot-spots and permanents silicon device damage. In this paper, the authors introduce an adaptive strategy to effectively diffuse heat throughout the 3D geometry. This strategy employs a dynamic...

    Provided By Massachusetts Institute of Technology

  • White Papers // Sep 2010

    Achieving Non-Inclusive Cache Performance With Inclusive Caches

    Inclusive caches are commonly used by processors to simplify cache coherence. However, the trade-off has been lower performance compared to non-inclusive and exclusive caches. Contrary to conventional wisdom, the authors show that the limited performance of inclusive caches is mostly due to inclusion victims - lines that are evicted from...

    Provided By Massachusetts Institute of Technology

  • White Papers // Jun 2011

    Asymptotic Interference Alignment for Optimal Repair of MDS codes in Distributed Data Storage

    In distributed storage systems, Maximum Distance Separable (MDS) erasure codes are well-known coding schemes that can offer maximum reliability for a given storage overhead. Consider a scenario where a file of size M is to be stored in n distributed storage nodes. The file is split into k equal parts...

    Provided By Massachusetts Institute of Technology

  • White Papers // Nov 2011

    Polynomial Length MDS Codes With Optimal Repair in Distributed Storage

    Erasure coding is a fundamental technique to build redundancy in distributed storage systems. In classical literature in coding theory, erasure codes have been developed so that they provide the maximum tolerance to disk failure (erasures) for a given storage overhead. In particular, it is well known that Maximum Distance Separable...

    Provided By Massachusetts Institute of Technology

  • White Papers // Aug 2004

    Hiding and Revealing in Online Poker Games

    Poker is largely a game of social and psychological information. However, online card room interfaces do not support the subtle communication between players that is integral to the psychological aspect of the game, making the games less authentic and less enjoyable than they could be. The paper explores how card...

    Provided By Massachusetts Institute of Technology

  • White Papers // Feb 2002

    Dispersed Employment, Commuting, and Mixed Land-Use in Modern Cities

    This paper has two objectives. The first is to review a range of empirical evidence that suggests this vision of urban form is largely incorrect. Over time, in most cities, real estate rents and asset prices grow little more than inflation. In addition, recently released data on the spatial distribution...

    Provided By Massachusetts Institute of Technology

  • White Papers // Nov 2000

    Ski Resort Real Estate Markets: Why Not to Invest

    This paper examines the behavior of ski resort property in a major New England market over the last 25 years. A property price series is constructed for the Loon Mountain resort, which is believed to be quite typical of New England Ski areas. This series reveals that nominal prices are...

    Provided By Massachusetts Institute of Technology

  • White Papers // Feb 2004

    The Role of Software in Spacecraft Accidents

    The first and most important step in solving any problem is understanding the problem well enough to create effective solutions. To this end, several software-related spacecraft accidents were studied to determine common systemic factors. Although the details in each accident were different, very similar factors related to flaws in the...

    Provided By Massachusetts Institute of Technology

  • Tools & Templates // May 2006

    Project Control Book

    This is a template for project control book.

    Provided By Massachusetts Institute of Technology

  • White Papers // Sep 2008

    Keyword Programming in Java

    Keyword programming is a novel technique for reducing the need to remember details of programming language syntax and APIs, by translating a small number of unordered keywords provided by the user into a valid expression. In a sense, the keywords act as a query that searches the space of expressions...

    Provided By Massachusetts Institute of Technology

  • White Papers // Sep 2008

    Refactoring Sequential Java Code for Concurrency Via Concurrent Libraries

    Parallelizing existing sequential programs to run efficiently on multicores is hard. The Java 5 package java.util.concurrent (j.u.c.) supports writing concurrent programs: much of the complexity of writing threads-safe and scalable programs is hidden in the library. To use this package, programmers still need to reengineer existing code. This is tedious...

    Provided By Massachusetts Institute of Technology