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Papers by Nancy Janeth Diaz

Research paper thumbnail of How Do Internal Medicine Residency Programs Evaluate Their Resident Float Experiences?

Southern Medical Journal, 2006

We surveyed the nation's internal... more We surveyed the nation's internal medicine residency training program directors to determine the range and frequency of existing methods by which float experiences are evaluated. We sent questionnaires to the program directors of all 396 internal medicine residency training program sites in the country. Information requested included program characteristics, months devoted to float experiences in each year of training, and the location and purpose of the rotation. Program directors were also asked to choose among descriptors characterizing the evaluative process. There were 139 responding programs (39%), 134 with data that could be aggregated. Responding programs were similar to all programs nationally in the distributions of size and university sponsorship. Overall, 76% of programs employed a night float for any period of time, and 71% currently had one, on average for 6.7 years. Mean months of float experience during residency was 2.4 months, significantly longer in programs that were not university based. Float experiences were evaluated in 89% of those programs who employed them, with ten different methods reported. University-based programs were significantly less likely to use chart review as a method of evaluation, but no other differences in methodology were significant. Float rotations are common among internal medicine residency training programs. Evaluative methods vary, but one or more are applied in the vast majority of programs.

Research paper thumbnail of Landscape Pattern, Timber Extraction, and Biological Conservation

Applying Landscape Ecology in Biological Conservation, 2002

... l. A key strength of this approach is that it clearly links the broader (ie, land ... lands a... more ... l. A key strength of this approach is that it clearly links the broader (ie, land ... lands are managed for a variety of uses, including timber, water, wildlife, recreation, and scenery. ... Models to predict how entire communities will re-spond to vegetation management are urgently needed. ...

Research paper thumbnail of Self-Assembled Nanotubes in Organic Solvents

Macromolecular Symposia, 2006

Page 1. Self-Assembled Nanotubes in Organic Solvents Nancy Diaīz, Francļois-Xavier Simon, Marc Sc... more Page 1. Self-Assembled Nanotubes in Organic Solvents Nancy Diaīz, Francļois-Xavier Simon, Marc Schmutz, Philippe Meīsini* Summary: Self-assembled nanotubes are formed spontaneously in alkane solvents by a simple ...

Research paper thumbnail of Formation of Helical Mesopores in Organic Polymer Matrices

Journal of the American Chemical Society, 2007

JA067261E Figure 3. TEM of microsections of the resins. (a) with templates; (b) after leaching ou... more JA067261E Figure 3. TEM of microsections of the resins. (a) with templates; (b) after leaching out the template. Black arrows: helical tape (a) and helical pores (b) viewed perpendicular to their axis. White arrows: same objects, tilted. White arrow heads: helical pores, viewed along their axis.

Research paper thumbnail of Self-Assembled Diamide Nanotubes in Organic Solvents

Angewandte Chemie, 2005

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Research paper thumbnail of Self-Assembled Diamide Nanotubes in Organic Solvents

Angewandte Chemie International Edition, 2005

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Research paper thumbnail of Environmental Impact Characterization of Milling and Implications for Potential Energy Savings in Industry

Procedia CIRP, 2012

Since machining is a prevalent process in product manufacture this study reviews the accuracy of ... more Since machining is a prevalent process in product manufacture this study reviews the accuracy of a specific energy characterization model to predict the electrical energy consumed by a 3-axis milling machine tool during processing. The energy characterization model had an accuracy of 97.4% for the part manufactured under varied material removal rate conditions and highlighted the potential for energy reduction using higher cutting speeds. Interviews with cutting tool manufacturers and end users showed that there is a genuine potential for energy reduction during milling operations due to the extensive use of uncoated cutting tools in industry.

Research paper thumbnail of Environmental analysis of milling machine tool use in various manufacturing environments

Proceedings of the 2010 IEEE International Symposium on Sustainable Systems and Technology, 2010

A life-cycle energy consumption analysis of a Bridgeport manual mill and a Mori Seiki DuraVertica... more A life-cycle energy consumption analysis of a Bridgeport manual mill and a Mori Seiki DuraVertical 5060 has been conducted. The use phase incorporated three manufacturing environments: a community shop, a job shop, and a commercial facility. The CO2-equivalent emissions were presented per machined part. While the use phase comprised the majority of the overall emissions, the manufacturing phase emissions were significant especially for the job shop, which is not as efficient as the other facilities due to its inherent need for flexibility. Since the Mori Seiki is heavier, the manufacturing phase of this machine tool had a greater impact on emissions than the Bridgeport. Transportation was small relative to the use phase, which was dominated by cutting, HVAC, and lighting. These results highlight areas for energy reductions in machine tool design as well as the importance of facility type to the manufacture of any product.

Research paper thumbnail of Energy Consumption Characterization and Reduction Strategies for Milling Machine Tool Use

Glocalized Solutions for Sustainability in Manufacturing, 2011

Since machine tools are used extensively throughout their functional life and consequently consum... more Since machine tools are used extensively throughout their functional life and consequently consuming valuable natural resources and emitting harmful pollutants during this time, this study reviews strategies for characterizing and reducing the energy consumption of milling machine tools during their use. The power demanded by a micromachining center while cutting low carbon steel under varied material removal rates was measured to model the specific energy of the machine tool. Thereafter the power demanded was studied for cutting aluminum and polycarbonate work pieces for the purpose of comparing the difference in cutting power demand relative to that of steel.

Research paper thumbnail of Cost and Energy Consumption Optimization of Product Manufacture in a Flexible Manufacturing System

Leveraging Technology for a Sustainable World, 2012

Research paper thumbnail of Closed-Loop Production Systems

Green Manufacturing, 2012

Research paper thumbnail of Introduction to Green Manufacturing

Green Manufacturing, 2012

Research paper thumbnail of How Do Internal Medicine Residency Programs Evaluate Their Resident Float Experiences?

Southern Medical Journal, 2006

We surveyed the nation's internal... more We surveyed the nation's internal medicine residency training program directors to determine the range and frequency of existing methods by which float experiences are evaluated. We sent questionnaires to the program directors of all 396 internal medicine residency training program sites in the country. Information requested included program characteristics, months devoted to float experiences in each year of training, and the location and purpose of the rotation. Program directors were also asked to choose among descriptors characterizing the evaluative process. There were 139 responding programs (39%), 134 with data that could be aggregated. Responding programs were similar to all programs nationally in the distributions of size and university sponsorship. Overall, 76% of programs employed a night float for any period of time, and 71% currently had one, on average for 6.7 years. Mean months of float experience during residency was 2.4 months, significantly longer in programs that were not university based. Float experiences were evaluated in 89% of those programs who employed them, with ten different methods reported. University-based programs were significantly less likely to use chart review as a method of evaluation, but no other differences in methodology were significant. Float rotations are common among internal medicine residency training programs. Evaluative methods vary, but one or more are applied in the vast majority of programs.

Research paper thumbnail of Landscape Pattern, Timber Extraction, and Biological Conservation

Applying Landscape Ecology in Biological Conservation, 2002

... l. A key strength of this approach is that it clearly links the broader (ie, land ... lands a... more ... l. A key strength of this approach is that it clearly links the broader (ie, land ... lands are managed for a variety of uses, including timber, water, wildlife, recreation, and scenery. ... Models to predict how entire communities will re-spond to vegetation management are urgently needed. ...

Research paper thumbnail of Self-Assembled Nanotubes in Organic Solvents

Macromolecular Symposia, 2006

Page 1. Self-Assembled Nanotubes in Organic Solvents Nancy Diaīz, Francļois-Xavier Simon, Marc Sc... more Page 1. Self-Assembled Nanotubes in Organic Solvents Nancy Diaīz, Francļois-Xavier Simon, Marc Schmutz, Philippe Meīsini* Summary: Self-assembled nanotubes are formed spontaneously in alkane solvents by a simple ...

Research paper thumbnail of Formation of Helical Mesopores in Organic Polymer Matrices

Journal of the American Chemical Society, 2007

JA067261E Figure 3. TEM of microsections of the resins. (a) with templates; (b) after leaching ou... more JA067261E Figure 3. TEM of microsections of the resins. (a) with templates; (b) after leaching out the template. Black arrows: helical tape (a) and helical pores (b) viewed perpendicular to their axis. White arrows: same objects, tilted. White arrow heads: helical pores, viewed along their axis.

Research paper thumbnail of Self-Assembled Diamide Nanotubes in Organic Solvents

Angewandte Chemie, 2005

Skip to Main Content. ...

Research paper thumbnail of Self-Assembled Diamide Nanotubes in Organic Solvents

Angewandte Chemie International Edition, 2005

Skip to Main Content. ...

Research paper thumbnail of Environmental Impact Characterization of Milling and Implications for Potential Energy Savings in Industry

Procedia CIRP, 2012

Since machining is a prevalent process in product manufacture this study reviews the accuracy of ... more Since machining is a prevalent process in product manufacture this study reviews the accuracy of a specific energy characterization model to predict the electrical energy consumed by a 3-axis milling machine tool during processing. The energy characterization model had an accuracy of 97.4% for the part manufactured under varied material removal rate conditions and highlighted the potential for energy reduction using higher cutting speeds. Interviews with cutting tool manufacturers and end users showed that there is a genuine potential for energy reduction during milling operations due to the extensive use of uncoated cutting tools in industry.

Research paper thumbnail of Environmental analysis of milling machine tool use in various manufacturing environments

Proceedings of the 2010 IEEE International Symposium on Sustainable Systems and Technology, 2010

A life-cycle energy consumption analysis of a Bridgeport manual mill and a Mori Seiki DuraVertica... more A life-cycle energy consumption analysis of a Bridgeport manual mill and a Mori Seiki DuraVertical 5060 has been conducted. The use phase incorporated three manufacturing environments: a community shop, a job shop, and a commercial facility. The CO2-equivalent emissions were presented per machined part. While the use phase comprised the majority of the overall emissions, the manufacturing phase emissions were significant especially for the job shop, which is not as efficient as the other facilities due to its inherent need for flexibility. Since the Mori Seiki is heavier, the manufacturing phase of this machine tool had a greater impact on emissions than the Bridgeport. Transportation was small relative to the use phase, which was dominated by cutting, HVAC, and lighting. These results highlight areas for energy reductions in machine tool design as well as the importance of facility type to the manufacture of any product.

Research paper thumbnail of Energy Consumption Characterization and Reduction Strategies for Milling Machine Tool Use

Glocalized Solutions for Sustainability in Manufacturing, 2011

Since machine tools are used extensively throughout their functional life and consequently consum... more Since machine tools are used extensively throughout their functional life and consequently consuming valuable natural resources and emitting harmful pollutants during this time, this study reviews strategies for characterizing and reducing the energy consumption of milling machine tools during their use. The power demanded by a micromachining center while cutting low carbon steel under varied material removal rates was measured to model the specific energy of the machine tool. Thereafter the power demanded was studied for cutting aluminum and polycarbonate work pieces for the purpose of comparing the difference in cutting power demand relative to that of steel.

Research paper thumbnail of Cost and Energy Consumption Optimization of Product Manufacture in a Flexible Manufacturing System

Leveraging Technology for a Sustainable World, 2012

Research paper thumbnail of Closed-Loop Production Systems

Green Manufacturing, 2012

Research paper thumbnail of Introduction to Green Manufacturing

Green Manufacturing, 2012