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Stanford University


Latest Content From Stanford University

Whitepaper: Iterative Water-Filling for Optimal Resource Allocation in OFDM Multiple-Access and Broadcast Channels

by Stanford UniversityJan 01, 2008

A class of optimal resource allocation problems in linear Gaussian Multiple-Access and Broadcast Channels (MAC and BC) can be summarized as weighted sum power minimization problem. In this research paper an iterative water-filling algorithm is proposed to solve this problem efficiently. It is shown that by formulating an explicit rate expression for MAC, though non-convex of power spectral densities, the KKT conditions demonstrate a strong water-filling flavor.


Whitepaper: The Impact Of Rating Systems On Subcontracting Decisions A Transaction Cost Analysis

by Stanford UniversityJan 01, 2008

This research paper published by Stanford University investigates how different types of rating mechanisms can affect transaction costs in business-to-business electronic commerce. In consumer electronic marketplaces, where the asset-specificity of the transactions is generally low, simple un-weighted rating mechanisms have been shown to increase trust and therefore also decrease the transactions costs associated with opportunistic behavior. However, the paper argues that if a reputation mechanism is to decrease the transaction costs for highly asset specific transactions, it is necessary that the rating mechanism account for the relationship between the user and the rater.


Whitepaper: Universal Telecommunications Service In India

by Stanford UniversityJan 01, 2008

This research paper evaluates India’s universal service policies. Nearly every country in the world, including India, has policies intended to promote universal access to telecommunications services, despite the absence of evidence of a market failure in the industry. Universal service policies typically involve cross-subsidies among types of telecom consumers and among telecom providers. India’s New Telecom Policy of 1999 set goals of providing telephone and Internet access in all villages by 2002. This plan was not successful, so in 2003 DoT established a program to subsidize some telecommunications services in Indian villages.


Whitepaper: Construction Supply Chain Visualization Through Web Services Integration

by Stanford UniversityJan 01, 2008

This paper published by CIEF presents SCVisualizer, a real-time information visualization tool for construction supply chain management. SCVisualizer leverages Web Services and computer agent?s technology for building a virtual construction supply chain. Having real-time information available at any time can increase information transparency, which in turn, makes it easier for project managers to identify potential risks. However, this is not an easy task since this information has to be retrieved from heterogeneous systems. In addition, the process of information retrieval is intractable for practitioners.


Whitepaper: Adaptive Subcarrier and Power Allocation for Multiuser OFDM in Wireless Environments - A Survey

by Stanford UniversityJan 01, 2008

In this paper published by Stanford University, Yu-Kuan Lin describes about dynamically allocating different subcarriers and transmits power to users; this scheme can enhance system performance beyond a fixed-power, fixed-subcarrier scheme. Furthermore, OFDM is typically used as a physical layer modulation scheme, on top of which a MAC scheme, such as TDMA, CDMA, or FDMA is used. By allocating different subcarriers to different users, this approach can also be viewed as a MAC scheme, where the entire sets of subcarriers are shared between different users.


Whitepaper: Finding Security Vulnerabilities in Java Applications With Static Analysis

by Stanford UniversityJan 01, 2008

This research paper shows how a general class of security errors in Java applications can be formulated as instances of the general tainted object propagation problem, which involves finding all sink objects derivable from source objects via a set of given derivation rules. The researchers developed a precise and scalable analysis for this problem based on a precise context-sensitive pointer alias analysis and introduced extensions to the handling of strings and containers to further improve the precision. Their approach finds all vulnerabilities matching the specification within the statically analyzed code.


Whitepaper: Quality Risk In Outsourcing: Noncontractible Product Quality And Private Quality Cost Information

by Stanford UniversityJan 01, 2008

Recent trends in outsourcing have spread contract manufacturers’ (CMs) responsibility to new areas such as sourcing, design, and even research and development. This research paper from Stanford University is based on quality risk as lower OEM profits and product quality in the OEM-CM channel relative to a vertically integrated firm. The objective is to characterize the effects of each quality risk factor, and to design contracts that maximize the OEM’s profit by mitigating quality risk. It also explains the effect of the OEM’s product-pricing strategy on OEM’s profit and on product quality.


Whitepaper: Reflection Analysis for Java

by Stanford UniversityJan 01, 2008

Reflection has always been a thorn in the side of Java static analysis tools. Without a full treatment of reflection, static analysis tools are both incomplete because some parts of the program may not be included in the application call graph, and unsound because the static analysis does not take into account reflective features of Java that allow writes to object fields and method invocations. However, accurately analyzing reflection has always been difficult, leading to most static analysis tools treating reflection in an unsound manner or just ignoring it entirely. Java applications also make significant use of reflection.


Whitepaper: Advancing Economic Research On The Free And Open Source Software Mode Of Production

by Stanford UniversityJan 01, 2008

Early contribution to the academic literature on Free/Libre and Open Source Software (F/LOSS) movements have been directed primarily at identifying the motivations that account for the sustained and often intensive involvement of many people in this non-contractual and unremunerated productive activity. This research paper has been particularly prominent in economists’ contributions to the literature, and it reflects a view that widespread voluntary participation in the creation of economically valuable goods that is to be distributed without charge constitutes a significant behavioral anomaly.


Whitepaper: Generic Entity Resolution With Data Confidences

by Stanford UniversityJan 01, 2008

The Entity Resolution (ER) problem, in which records determined to represent the same real-world entity are successively located and merged. The approach to the ER problem is generic, in the sense that the functions for comparing and merging records are viewed as black-boxes. This paper from Stanford University, proposes a sound and flexible model for the ER problem with confidences, and proposes efficient algorithms to solve it. They validate algorithms through experiments that show significant performance improvements over naive schemes.