Describes NREL's work on next-generation vehicle cooling technologies (jets, sprays, microchannels) and novel packaging topologies to reduce costs and increase performance and reliability.

Describes NREL's R&D to develop a multi-scale model to assist in designing better, more reliable lithium-ion battery cells for advanced vehicles.

December 2008 DOE Algal Biofuels Technology Roadmap Workshop plenary presentation: summarizes past and current algal biofuels activity, status of research funding, and recent roadmapping activities.

Presentation for the 2008 International Conference on Dublin Core and Metadata Applications on assessing descriptive substance in free-text collection-level metadata.

The US has a national set of codes and standards that address the use of hydrogen technologies. These documents are published by several organizations and are not all directly adopted by government authorities. The US Department of Energy (DOE) has acted as the central organizing group to identify these documents and present them as a coherent and integrated set of requirements.

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Discussion of the formation of CdTe thin-film PV junctions and optimization of CdTe thin-film PV solar cells.

Overview of nominal operating cell temperature research, hypothesis, and testing at NREL.

2010 International Pyrheliometer Comparisons, IPC-XI Conference presentation titled: Uncertainty in Pyranometer and Pyrheliometer Calibrations Using GUM for NREL's ISO-17025 Accreditation Effort.

Presentation highlighting practical considerations for photovoltaic technologies and strategies for future reductions in cost and increases in efficiency.

This presentation discusses how preservation systems can share objects and specifically a collaboration between Chronopolis, MetaArchive, and the University of North Texas (UNT).

Overview of the PV module model. PVWatts module power estimates were compared with those using the Sandia model for three modules and data sets.

Presentation on shaded PV power loss, practical issues with modeling shaded PV, and methods of implementing partially shaded PV modeling.

This presentation discusses the University of North Texas (UNT) Digital Library Program and possible solutions for sudden growth in digital content.

This presentation addresses the engineering challenges of airborne wind technology.

Presentation for the 2011 International Symposium on ETDs. This presentation discusses data desiccation and facilitating long-term access, use and reuse of electronic theses and dissertations (ETDs).

This presentation describes the basic components of software-based energy analysis for residential buildings, explores the concepts of 'error' and 'accuracy' when analysis predictions are compared to measured data, and explains how NREL is working to continuously improve the accuracy of energy analysis methods.

The ability to accurately predict power delivery over the course of time is of vital importance to the growth of the photovoltaic (PV) industry. Two key cost drivers are the efficiency with which sunlight is converted into power and secondly how this relationship develops over time. The accurate knowledge of power decline over time, also known as degradation rates, is essential and important to all stakeholders?utility companies, integrators, investors, and scientist alike. Outdoor testing plays a vital part in quantifying degradation rates of different technologies in various climates. Due to seasonal changes, however, several complete cycles (typically 3-5 years) need to be completed traditionally to obtain reasonably accurate degradation rates. In a rapidly evolving industry such a time span is often unacceptable and the need exists to determine degradation rates more accurately in a shorter period of time. Advanced time series modeling such as ARIMA (Autoregressive Integrated Moving Average) modeling can be utilized to decrease the required time span and is compared with some non-linear modeling. In addition, it will be demonstrated how the JMP 9 map feature was used to reveal important technological trends by climate.

This research is to illustrate the use of statistical inference techniques in order to quantify the uncertainty surrounding reliability estimates in a step-stress accelerated degradation testing (SSADT) scenario. SSADT can be used when a researcher is faced with a resource-constrained environment, e.g., limits on chamber time or on the number of units to test. We apply the SSADT methodology to a degradation experiment involving concentrated solar power (CSP) mirrors and compare the results to a more traditional multiple accelerated testing paradigm. Specifically, our work includes: (1) designing a durability testing plan for solar mirrors (3M's new improved silvered acrylic "Solar Reflector Film (SFM) 1100") through the ultra-accelerated weathering system (UAWS), (2) defining degradation paths of optical performance based on the SSADT model which is accelerated by high UV-radiant exposure, and (3) developing service lifetime prediction models for solar mirrors using advanced statistical inference. We use the method of least squares to estimate the model parameters and this serves as the basis for the statistical inference in SSADT. Several quantities of interest can be estimated from this procedure, e.g., mean-time-to-failure (MTTF) and warranty time. The methods allow for the estimation of quantities that may be of interest to the domain scientists.

This presentation was given as an invited talk to faculty and students at Universidad Autónoma del Estado de México (UAEM) in Toluca, Mexico. The presentation discusses research on multilingual information access and the Metadata Records Translation (MRT) Project.

This presentation describes the Battery Second Use Project. Preliminary analysis results show (1) the impact of competing technologies, (2) potential revenue generation, and (3) supply and demand of the second use of plug-in electric vehicle batteries. The impact of competing technologies are: maximum salve value of a used battery will be limited by future battery prices, under favorable conditions, second use can only discount today's battery prices by 12% or less, however, second use will offer batteries to second applications at reduced cost (typically < $170/kWh). Revenue streams are highly variable, allowable battery costs are highly sensitive to balance-of-system costs, and batteries need to be very cheap for these applications to be viable. Supply and demand show that high-value applications have both competition and small markets, and supply from plug-in electric vehicles has the potential to overwhelm many second use markets.

The high-statistics data samples from the BABAR and Belle B-Factory experiments provide stringent constraints on charged Higgs bosons within the context of specific New Physics models. These constraints are obtained by comparing Standard Model predictions with experimental observations in rare B decays with potential sensitivity to contributions mediated by a virtual H{sup {+-}} in tree or loop diagrams. Recent experimental results on the decays B{sup +} {yields} {mu}{sup +}{nu}, B{sup +} {yields} {tau}{sup +}{nu} and inclusive B {yields} X{sub s}{gamma} are described and the implications of these measurements for charged Higgs bosons is discussed.

This presentation is designed to provide institutions with Electronic Theses and Dissertation (ETD) initiatives with information about preserving ETDs. In this presentation, the authors discuss ETDs and preservation needs, MetaArchive and distributed preservation, Networked Digital Library of Theses and Dissertations (NDLTD)/MetaArchive ETD DDPN Archive, collections management for preservation, MetaArchive and its member roles and responsibilities, and the ETD Lifecycle Management Project.