Research

Senior Researcher:
The Triangle Census Research Network (TCRN), established by NISS and Duke University, develops broadly-applicable methodologies intended to transform and improve data dissemination practice in the federal statistical system. It focuses primarily on methods for (1) handling missing data and... more
Senior Researcher:
The Internet is rapidly becoming the main way people read and process information. The Internet requires additional reading, comprehension skills, beyond those needed for printed text. One dilemma is how do students discern what information is correct and what is incorrect? NISS participated in a $... more
Senior Researcher:
The Longitudinal Business Database (LBD) is a census of business establishments in the U.S. with paid employees that was developed by the Center for Economic Studies at the U.S. Bureau of the Census. It supports an active research agenda focusing on business entry and exit, gross employment flows,... more
Senior Researcher:
NISS and Duke University are collaborating on the Triangle Census Research Network (TCRN), one of eight research nodes that are working on the National Census Research Network (NCRN). NISS and Duke are looking at ways to improve how federal statistical (“FedStats”) agencies disseminate data to the... more
Senior Researcher:
Take yourself back to 1960. Despite the Cold War, it was a time of optimism in the United States.Our economy was booming, the industrial age was at its peak and we expected to continue our growth and prosperity. Civil rights and the Viet Nam war were still in the future. In the spring of 1960, the... more
Senior Researcher:
Users of the nation’s road and highway network are increasingly dependent on estimates of travel times from where they are to where they want to go. Such information is available from traffic system managers and commercial sources, and multiple mechanisms ranging from variable message signs to GPS... more
Senior Researcher:
Syndromic surveillance uses syndrome (a specific collection of clinical symptoms) data to monitor for indications of a potential or incipient disease outbreak. Other advanced surveillance systems have been implemented globally for early detection of infectious disease outbreaks and bioterrorist... more
Senior Researcher:
Official statistics surveys face a constant tradeoff between data quality and cost, which is dictated by current and anticipated budget pressures.   The World’s Simplest Survey Microsimulator (WSSM) was developed to work as a laboratory for survey scientists so they can try various scenarios out in... more
The National Institute of Statistical Sciences (NISS), at the request of the National Center for Education Statistics (NCES) convened a Technical Expert Panel (TEP) to review and make recommendations concerning NCES' Comparable Wage Index (CWI). The CWI is a statistical tool developed by NCES for... more
Senior Researcher:
Emerging OMICS technologies such as microarray and highthroughput screening have been adopted across a broad spectrum of applications as these technologies are capable of simultaneous measurements of very large numbers of channels. Thus they enable rapid experimental turnaround with an accompanying... more
Senior Researcher:
NISS has joined the Clinical Proteomic Technologies for Cancer research initiative that focuses on technologies for cancer biomarker discovery. The overall goal is to foster the building of an integrated foundation of proteomic technologies, data, reagents and reference materials, and analysis... more
Senior Researcher:
NISS joined the Clinical Proteomic Technologies for Cancer research initiative that focuses on technologies for cancer biomarker discovery. The overall goal was to foster the building of an integrated foundation of proteomic technologies, data, reagents and reference materials, and analysis systems... more
Senior Researcher:
Two postdoctoral fellows will work on research aspects of longitudinal analyses using the Survey of Doctoral Recipients and small domain estimation for several SRS surveys.According to the NSF website, "The Survey of Doctorate Recipients is a longitudinal biennial survey conducted since 1973 that... more
Senior Researcher:
 Working through the Education Statistics Services Institute-Statistics (ESSI-Stat) and NAEP Education Statistics Services Institute (NESSI), NISS has convened a series of task forces to bring nationwide expertise to bear on problems of importance to the National Center for Education Statistics (... more
The National Institute of Statistical Sciences (NISS) established a Cross-Sector Research in Residence Program in partnership with the National Agricultural Statistics Service (NASS), the survey and estimation arm of the U.S. Department of Agriculture. This new collaborative venture by NISS and the... more
Senior Researcher:
One of the factors the Federal Drug Administration (FDA) looks for when evaluating a drug is the potential for that drug to induce a cardiac arrhythmia. When a drug is administered to a patient, some of them can interfere with the normal electrical signals of the heart. In a normal heartbeat, the... more
Senior Researcher:
The goal of this project is to reconcile two methods for modeling change in social networks over time: a class of statistical models and intelligent agent models. The research contrasts the roperties of these two approaches, exploring what qualitative dynamic behaviors in social networks are... more
Senior Researcher:
NISS conducted research in data confidentiality, data quality, and data integration. Prototypes were built which could scale to operate on large sets of Federally held data. Researchers partnered with several large Federal Government statistical agencies. This topic was of particular importance... more
Senior Researcher:
Under a cooperative agreement with the EPA, NISS provided the EPA rapid access to the national statistics community, which in turn furnished statistical input and commentary on environmental issues in a timely basis to policy and decision makers, other officials and researchers. This project... more
Senior Researcher:
NISS studied how to conduct data swapping, one of a number of techniques meant to distort confidentiality-threatening high-dimensional characteristics of a database while preserving non-threatening low-dimensional characteristics. Data swapping exchanges attribute values between records. The issues... more
Senior Researcher:
Though inherently statistical, model evaluation lacks a unifying statistical framework. NISS was hired to help find a overlying system to help with model evaluation. The research team used Bayesian techniques to measure the degree to which a model captures the underlying reality; theory and methods... more
Senior Researcher:
The Chicago Department of Transportation (CDOT) implemented NISS-developed strategies for operation of traffic signals on the near North side of Chicago. A team consisting of NISS, North Carolina State University, the University of Illinois at Chicago, and CDOT developed prediction models using... more
Senior Researcher:
The goal was to design, implement and evaluate light weight instrumentation for software testing and profiling. The underlying concept was that different instances (users' copies) of the software are instrumented to collect information differently bu lightly so that performance is not impaired.... more
Senior Researcher:
A critical problem for users of the World Wide Web is that many sites are difficult to navigate, hard to use and have confusing structure. Users may become lost, and they may make large leaps within a website (for example, returning unnecessarily to the home page) that are inconsistent with its... more
Senior Researcher:
Data quality issues were being explored, along with paths to resolve them, for the Bureau of Transporation Studies' (BTS) Intermodal Transportation Database (ITDB). One principal recommendation is that BTS develop a software toolkit that would automate generic aspects of data quality assessments... more
Senior Researcher:
NISS was hired to help develop and build systems that expanded to Federal data but that preserved the confidentiality of the data and privacy of subjects. The systems would respond to queries from networked users of Federal data bases by performing and reporting statistical analyses that extract... more
Senior Researcher:
The Toxic Release Inventory (TRI) is used for purposes ranging from estimation of trend to environmental justice. It was created to force public disclosure of releases of toxic chemicals to the air, water and land. Under a cooperative agreement with EPA's Office of Environmental Information, NISS... more
Senior Researcher:
NISS examined emission models for integrating on road emissions data with traffic parameters and produced a usable method for traffic management operations. The team verified results by integrating results from remote sensor data on emission measurements and traffic data using area wide detectors.... more
Senior Researcher:
The Indices of Environmental Status and Trend project was part of a consortium including American, George Mason, Maryland-Baltimore County and Penn State that was organized by the EPA's Center of Environmental Information and Statistics. NISS worked on the protocols and case studies for the public... more
Senior Researcher:
NISS defined and developed a strategy for the evaluation of GM computer models, in cooperation with GM scientists, and implemented the strategy on test bed problems. Central research issues included the association of confidence limits to predictions of computer models; uncertainty estimates for... more
Senior Researcher:
One of the main features of the evolution of large software systems is that change-which is necessary to add new functionality, accommodate new hardware, and repair faults-becomes increasingly difficult over time. This phenomenon, which NISS called code decay, was studied by the team. They proposed... more
Senior Researcher:
This research provides surrogate statistical models for the usually deterministic output of complex computer models which cannot be directly explored in great detail because of their size and limitations on the number of runs. The models ate based on a set of runs at selected inputs to aid in... more
Senior Researcher:
The Environmental Protection Agency and scientists from several universities across the United States and Canada worked on network design for environmental monitoring; space-time models, data fusion, health and pharmacokinetics; risk assesment of toxicants; and data representation and reporting.
Senior Researcher:
NISS was hired by the NAEP to develop new statistical methods to analyze complex surveys in the field of education. NISS developed more effective designs for answering basic questions facing education policy. A group of researchers including statisticians, psychometricians, and education... more
Senior Researcher:
Large data sets are a given in modern industry, technology and science and central issues concerning them demand statistical attention. While the need is apparent, paths to bringing statistical science to bear on large data sets are not clearly mapped. General approaches will emerge most rapidly if... more