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109 Resources for

harvard university

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Evaluating Automatic Brain Tissue Classifiers: This paper presents a quantitative evaluation of MR brain images segmentation. Five classifiers were tested. The task was to classify an MR image into four different classes: background, cortical spinal fluid, gray matter and white matter. The performance was rated by first estimating a ground truth EGT using STAPLE and...; Tags: Harvard University, performance; White papers
Temporal Unfolding of Mental Calculation: A 3D PRESTO fMRI Study: This paper is the result of an event-related fMRI study of mental multiplication and estimation using the 3D BOLD PRESTO pulse sequence. The initial goal was to investigate the rapid analog numerical magnitude assessing system. Emphasis was put on an experimental design sensitized to several parametric aspects inherently present in...; Tags: Harvard University, 3D; White papers
Computational Risk Management For Building Highly Reliable Network Services: Building reliable network services that can deliver consistent high performance to clients in the presence of failures and bursty demand is expensive and inefficient. Resources often need to be heavily overprovisioned to accommodate peak demand and the cost of such over-provisioning "Prices out" many applications that could stand to benefit...; Tags: Business services, Harvard University, network service, service provider, risk management, high-performance, network, storage, benefit, performance; White papers
Anatomical Guided Segmentation With Non-Stationary Tissue Class Distributions in an Expectation-Maximization Framework: High quality segmentation of brain MR images is a challenging task. To deal with this problem many automatic segmentation methods rely on atlas information of anatomical structures. We further investigate this line of research by introducing hierarchical representations of anatomical structures in an Expectation-Maximization framework. This new approach enables us...; Tags: Harvard University, segmentation; White papers
A Prospective Multi-Institutional Study of the Reproducibility of fMRI: A Preliminary Report From the Biomedical Informatics Research Network: Functional magnetic resonance imaging fMRI has significantly contributed to understanding both normal and diseased human brains. Variability often exists in the magnitude, spatial distribution, and statistical significance of the resulting fMRI maps due to differences in equipment and other site-specific differences. In addition, because of costly imaging, demanding tasks, and...; Tags: Harvard University, biomedical, imaging; White papers

Global Outsourcing Of Services: Issues And Implications: Global outsourcing has clearly made the structure of international competition and consequent labor market adjustments more intense. However it is not a new phenomenon. While global outsourcing is not a zero-sum game, there will inevitably be adjustment costs and job losses that need to be addressed in a timely and...; Tags: Harvard University, outsourcing, adjustment, job, game; White papers 2007-07-26
Flattening The World Efficiently: Digital Sustainability For The 21st Century: Information Technology IT infrastructure will drive globalization and growth in the world economy of the twenty-first century. These technologies expose comparative advantages and increase productivity, effectively flattening the competitive landscape. While the economic benefits of digital adoption are often cited, the environmental impact of these technologies remains unclear. Policy research...; Tags: Strategy, Harvard University, sustainability, globalization, knowledge management, information technology, data center, knowledge, environment, benefit; White papers 2007-04-23
Theory And Empirical Work On Imperfectly Competitive Markets: This paper reviews developments in the empirical analysis of imperfectly competitive markets highlighting issues which still get in the way of analyzing certain questions and/or particular markets. Some of the problematic issues are econometric. The need for a deeper understanding of the properties of estimators based on moment inequalities and...; Tags: Harvard University, theory, analysis; White papers 2007-03-31
The Structure Of The Product Space And The Evolution Of Comparative Advantage: This paper establishes a robust stylized fact: changes in the revealed comparative advantage of nations are governed by the pattern of relatedness of products at the global level. As countries change their export mix, there is a strong tendency to move towards related goods rather than to goods that are...; Tags: Harvard University; White papers 2007-04-01
Developing A Leading Indicator For The Remodeling Industry: This paper describes the process for developing the Leading Indicator of Remodeling Activity LIRA, designed to estimate quarterly current and future home improvement expenditures by homeowners. The indicator, measured as an annual rate-of-change of its components, provides a short-term outlook of remodeling activity, with a horizon of three quarters. Like...; Tags: Harvard University, home improvement; White papers 2007-04-01
Capital Structure With Risky Foreign Investment: Firms facing significant business risks have incentives to mitigate the costs of these risks by adjusting their capital structures. This paper investigates this link by analyzing the exposures of multinational firms to political risks. The evidence indicates that returns on investment in politically risky foreign countries are more volatile than...; Tags: Capital structures, Strategy, Harvard University, capital structure, risk, incentive, industry; White papers 2007-03-01
Multinational Firms, FDI Flows And Imperfect Capital Markets: This paper examines how costly financial contracting and weak investor protection influence the cross-border operational, financing and investment decisions of firms. A model is developed in which product developers have a comparative advantage in monitoring the deployment of their technology abroad. The paper demonstrates that when firms want to exploit...; Tags: Foreign direct investment (FDI), Currency & Foreign exchange, Investment, Financial accounting, Harvard University, foreign direct investment, monitoring, capital market, financial, financing; White papers 2007-01-01
Reinventing The Role Of Information And Communications Technologies In Education: This paper sketches a vision, not a prediction, of how emerging ICT might shape the evolution of teaching, learning, and schooling. A prediction portrays the future as like a train track leading us to a predestined outcome for which one must prepare. In contrast, a forecast depicts the future as...; Tags: Strategy, Harvard University, trunk, Information and Communication Technology, vision; White papers 2007-01-01
How Does Foreign Direct Investment Promote Economic Growth?: The empirical literature finds mixed evidence on the existence of positive productivity externalities in the host country generated by foreign multinational companies. We propose a mechanism that emphasizes the role of local financial markets in enabling Foreign Direct Investment FDI to promote growth through backward linkages, shedding light on this...; Tags: Foreign direct investment (FDI), Currency & Foreign exchange, Investment, Financial accounting, Harvard University, foreign direct investment, financial market, financial; White papers 2006-12-01
A Retrospective Look At The U.S. Productivity Growth Resurgence: It is now widely recognized that Information Technology IT was the key to the dramatic acceleration of U.S. labor productivity growth in the mid-1990s. This paper traces the evolution of productivity estimates to document how and when this perception emerged. Early studies concluded that IT was relatively unimportant. It was...; Tags: Strategy, Harvard University, information technology, IT investment, dot-com; White papers 2006-12-01
Financial Globalization: A Reappraisal: This paper on the benefits and costs of financial globalization for developing countries has exploded in last few years, but along many disparate channels with a variety of apparently conflicting results. There is still little robust evidence of the growth benefits of broad capital account liberalization, but a number of...; Tags: Free trade, Financial accounting, Benefits, Harvard University, liberalization, financial integration, benefit, financial, developing country, equity, finance; White papers 2006-12-01
How Efficient Information Diffusion Drives Out Diversity And Lowers Collective Problem Solving Ability: Whether as team members brainstorming, or cultures experimenting with new technologies, problem solvers communicate and share ideas. This paper examines how the structure of communication networks among actors can affect system-level performance. We present an agent-based model of information sharing, where the less successful emulate the more successful. Results suggest...; Tags: Real estate, Performance management, Harvard University, agent, performance, network, team; White papers 2006-11-25
Contractual Frictions And Global Sourcing: This paper explains the model of international organization of production in order to accommodate varying degrees of contractual frictions. In particular, we allow the degree of contractibility to vary across inputs and countries. A continuum of firms with heterogeneous productivities decides whether to integrate or outsource the production of intermediate...; Tags: Channel management, Harvard University, friction, ownership structure, supplier, outsource; White papers 2006-11-22
Cross Functional Alignment in Supply Chain Planning: A Case Study of Sales & Operations Planning: The purpose of case studies is not to argue for specific solutions but rather develop explanations (Yin 1984). Still the question of how far an explanation goes to help with a particular range of problems is a fair one. In terms of whether this is a problem faced by other...; Tags: Supply chain management (SCM), Harvard University, SCM, supply chain, sales; Case studies 2006-10-11
Managing Functional Biases in Organizational Forecasts: A Case Study of Consensus Forecasting in Supply Chain Planning: To date, little research has been done on managing the organizational and political dimensions of generating and improving forecasts in corporate settings. This paper examines the implementation of a supply chain planning process at a consumer electronics company, concentrating on the consensus forecasting approach around which the process revolves. The...; Tags: Sales force management, Harvard University, forecasting, differentiation, supply chain, consumer electronics, analysis; Case studies 2006-10-10