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Effect Of Calorie Restriction On Circadian Rhythms Of Glycolytic Enzymes In Mice, Enas A. Muhammad, Artem Astafev, Kuldeep Makwana Jan 2016

Effect Of Calorie Restriction On Circadian Rhythms Of Glycolytic Enzymes In Mice, Enas A. Muhammad, Artem Astafev, Kuldeep Makwana

Undergraduate Research Posters 2016

Multicellular and unicellular organisms have all proven to exhibit circadian rhythms which persist over approximately 24 hours. This internal time keeping system is responsible for regulating the body's biological functions. It has been known that calorie restriction effects circadian rhythms by causing a response in clock gene expression. These clock genes react to food intake and become either upregulated or downregulated accordingly. With glycolysis being a biological pathway that occurs in most organisms, measuring glycolytic gene expression in the liver tissue of young male mice becomes of interest. More specifically, hexokinase, PFK-1, and pyruvate kinase are the enzymes of interest. …

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Expression Of Recombinant Proteins In Bacteria For Antibody Production, John Sabljic, Anton Denisyuk, Hallie Schmolz, Olivera Prica Jan 2016

Expression Of Recombinant Proteins In Bacteria For Antibody Production, John Sabljic, Anton Denisyuk, Hallie Schmolz, Olivera Prica

Undergraduate Research Posters 2016

The protozoan parasite Trypanosoma brucei causes fatal African trypanosomiasis in humans and nagana in cattle. Transmitted by the tsetse fly, T. brucei proliferates in the bloodstream of its mammalian host and evades the host's immune response by regularly switching its major surface antigen, VSG, which forms a thick coat on its cell membrane. VSGs are exclusively expressed from sub-telomeric regions of the T. brucei genome in a strictly monoallelic fashion. Telomeres, DNA-protein complexes located at chromosome ends, help maintain chromosome stability and integrity. We have also found that telomere proteins are important for regulating VSG expression and switching. We are …

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The Identification Of Anti-Cancer Molecular Targets Of Cox-2 Inhibitor Nimesulide, Yuridia Olivera Ortiz, Nethrie D. Idippily Jan 2016

The Identification Of Anti-Cancer Molecular Targets Of Cox-2 Inhibitor Nimesulide, Yuridia Olivera Ortiz, Nethrie D. Idippily

Undergraduate Research Posters 2016

Non-steroidal anti inflammatory drugs which were primarily used for the treatment inflammation and pain have also shown anti-cancer activity in many studies. The mechanism of action of NSAIDs in cancer may involve cyclooxygenase (COX) dependent or independent pathways. According to studies, COX-2 is overexpressed in several cancers such as prostate, breast, nonsmall-cell lung, colon, and pancreas. Nimesulide is an NSAID with COX-2 inhibitory activity and investigations show that it could induce apoptosis in cancer. Previously, a library of compounds was synthesized using Nimesulide as a lead compound. However, they displayed different molecular targets: tubulin and heat shock protein 27 (HSP27). …

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Light Scattering Characterization Of Elastin-Like Polypeptide Trimer Micelles, Ilona Tsuper, Daniel Terrano, Adam Maraschky Jan 2016

Light Scattering Characterization Of Elastin-Like Polypeptide Trimer Micelles, Ilona Tsuper, Daniel Terrano, Adam Maraschky

Undergraduate Research Posters 2016

Elastin-Like Polypeptides (ELP) can be used to form thermo-reversible vehicles for drug delivery systems. The ELP nanoparticles are composed of three-armed star polypeptides. Each of the three arms extending from the negatively charged foldon domain includes 20 repeats of the (GVGVP) amino acid sequence. The ELP polymer chains are soluble at room temperature and become insoluble at the transition temperature (close to 50 oC), forming micelles. The size and shape of the micelle is dependent on the temperature and the pH of solution, along with the concentration of the Phosphate Buffered Saline (PBS) solvent. The technique of Depolarized Dynamic Light …

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Variation Of Bone Microarchitecture Within And Among Contemporaneous Species Of Fossil Horses: Feasibility, Emily A. Edwards Jan 2016

Variation Of Bone Microarchitecture Within And Among Contemporaneous Species Of Fossil Horses: Feasibility, Emily A. Edwards

Undergraduate Research Posters 2016

Mesohippus, Miohippus, and Merychippus are extinct horse species that date back fifteen to thirty million years ago, which spanned over three time periods in North America. Each of the horses habituated different terrains from wet to dry. The third metacarpal became the prominent one-toe of horse evolution and is the specimen of this study. The aim is to determine if reorientation, segmentation, correcting size differences, and isolation are feasible. Horse fossils are extensive, documented, and are used as an analogous fossil lineage to humans for this study. Imaging of the third metacarpal was accomplished by micro-CT scanning with a focus …

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Elimination Of Acoustic Noise In Stm Analysis Of Polymer Crystallization On Au (111), Mark Bowling, William Myers Jan 2016

Elimination Of Acoustic Noise In Stm Analysis Of Polymer Crystallization On Au (111), Mark Bowling, William Myers

Undergraduate Research Posters 2016

Organic molecules offer a potentially cheap and environmentally friendly alternative to traditional silicon based electronics. The main limitation is that they are not as conductive as their inorganic counter parts. By crystalizing organic molecules, it is possible to increase the conductivity so that they can be more competitive with silicon electronics. This project examines the crystallization of polymers through selfassembly on the Au(111) surface reconstruction. The success of the crystallization is characterized with scanning tunneling microscopy (STM). In order to achieve high resolution STM images, we examined acoustic isolation by enclosing the microscope within a rubber-coated box, which was not …

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Which Clouds Are Important: Variation Of Cloud Size Distribution Functions In Large Eddy Simulations, Dorothy Pharis, Nicholas Barron Jan 2016

Which Clouds Are Important: Variation Of Cloud Size Distribution Functions In Large Eddy Simulations, Dorothy Pharis, Nicholas Barron

Undergraduate Research Posters 2016

Accurately measuring and modeling clouds is an important factor in improving weather and climate prediction. One way of measuring the most important cloud size in a cloud field is a cloud size distribution (CSD) function, or the number of clouds per cloud size within the field. The information from a cloud size distribution can then be used to determine which cloud sizes contribute the most to cloud cover. This research focuses on creating and comparing cloud size distributions for a variety of cumulus cloud fields generated by Large Eddy Simulations (LES), a high resolution computer model. Our work found that …

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How Dry Is The Lower Atmosphere: Finding Relations Between Various Moments In The Atmospheric Boundary Layer, Vladimir Sworski Jan 2016

How Dry Is The Lower Atmosphere: Finding Relations Between Various Moments In The Atmospheric Boundary Layer, Vladimir Sworski

Undergraduate Research Posters 2016

The Atmospheric Boundary Layer (ABL), consisting of the bottom few kilometers of the troposphere, is a highly turbulent region with strong mixing of moisture and winds. This region's activity is driven by thermals, which rise to the top of the boundary layer and thicken it through entrainment of warm air from above. To better predict the behavior of the ABL, a good understanding of the distribution of heat, moisture and momentum is important. In this study, we use a high resolution computer model (LES) to determine those distributions. We were able to reproduce observations when using a temporal averaging that …

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Optimizing Dynamic Light Scattering For The Analysis Of Anisotropic Nanoparticles In Solution, Tony Dobrila Jan 2016

Optimizing Dynamic Light Scattering For The Analysis Of Anisotropic Nanoparticles In Solution, Tony Dobrila

Undergraduate Research Posters 2016

To further understanding of light scattering on solution of anisotropic hard-to-image soft particles such as elastin-like polypeptide micelles the light scattering characterization of anisotropic easy-to-image inorganic gold nanoparticles was undertaken. We used Depolarized Dynamic Light Scattering (DDLS) and Scanning Electron Microscopy (SEM) to study commercial gold nanoparticles: nanospheres, nanorods with aspect-ratio=3, and nanorods with aspect ratio=7. According to SEM particles appeared to be larger than manufacturer specs, namely 2R=18.9±1.3nm, (26.1±4.1)x(65.5±9.5)nm, and (16.3±2.2)x(103.6±16.7)nm, respectively. DDLS on nanospheres showed no rotational diffusion (VH) signal, q dependence of decay rate consistent with that of spherical particles, no concentration dependence of translational diffusion coef- …

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Effects Of Flanking Bigrams On Decision Performance In Selective And Divided Attention Tasks, Nicole Russo, Jamie Rodman Jan 2016

Effects Of Flanking Bigrams On Decision Performance In Selective And Divided Attention Tasks, Nicole Russo, Jamie Rodman

Undergraduate Research Posters 2016

In previous research, lexical decision performance for word targets flanked by pairs of letters was better when flankers consisted of letters in the target (e.g., BI BIRD RD; RD BIRD BI; IB BIRD DR; DR BIRD IB) than of non-target letters (e.g., CE BIRD NT). Also, performance was better when flankers contained letters ordered as in the target (e.g., BI BIRD RD; RD BIRD BI) than switched (e.g., IB BIRD DR; DR BIRD IB), but flanker order relative to the target did not affect performance. That flankers affect lexical decision performance indicates that participants do not attend selectively to the …

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How Does Educational Opportunities Influence Decisions For Nigerian Girls And The Society?, Shalonda Swanson Jan 2016

How Does Educational Opportunities Influence Decisions For Nigerian Girls And The Society?, Shalonda Swanson

Undergraduate Research Posters 2016

This paper raises questions about educational opportunities for Nigerian girls to understand if traditional Islamic or Western education influence the girls on various factors; including, their religious connections, optimism for their future, and the value in Islamic education compared to Western education. To discuss the current status of the country the paper discusses the historical underlying factors that influenced Nigeria's policies for educational opportunities for girls. Nigeria has struggled with gender disparities that disproportionately provided educational opportunities for boys at an increased rate compared to girls. This research reports the traditional values that restricted girls' access to education and the …

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Effect Of Parental Communication On Adjustment Of Typically Developing Children With An Atypically Developing Sibling, Christina Adkins, Meghan Murray Jan 2016

Effect Of Parental Communication On Adjustment Of Typically Developing Children With An Atypically Developing Sibling, Christina Adkins, Meghan Murray

Undergraduate Research Posters 2016

Disorders comprised of intellectual and developmental disabilities (IDD) as a group are comprised of autism spectrum disorders, Down syndrome, and various genetic conditions that stunt the intellectual and functional development of an individual. These disorders affect roughly 14% of families in the US (Boyle et al., 2011), which approximates to seven million households in the US. The presence of IDD in a child is often associated with increased stress for the parents, given that IDD is often accompanied by behavioral problems in the affected child. Surprisingly, relatively little work has been done on the effects of IDD on typically developing …

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Design And Fabrication Of A Microfluidic Device Using A 3d Printer, Aaron Smith Jan 2016

Design And Fabrication Of A Microfluidic Device Using A 3d Printer, Aaron Smith

Undergraduate Research Posters 2016

The goal of this work was to design and implement a microfluidic mixer-based chemical reactor using a 3-D printer. Microfluidic devices are very useful for processes that use expensive reactants or require a high level of control, and we hypothesize that the ability to develop a prototype using a 3-D printer would lower their costs and help overcome some of the limitations of soft-lithography based devices. One-level and two-level designs were made using SolidWorks® software, and various stages of the model were printed on Objet® and FDM® printers. The Objet printer offers the advantage of printing a prototype using a …

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Light Scattering Study Of Mixed Micelles Made From Elastin-Like Polypeptide Linear Chains And Trimers, Ilona Tsuper, Daniel Terrano, Adam Maraschky Jan 2016

Light Scattering Study Of Mixed Micelles Made From Elastin-Like Polypeptide Linear Chains And Trimers, Ilona Tsuper, Daniel Terrano, Adam Maraschky

Undergraduate Research Posters 2016

Temperature sensitive nanoparticles (E20F) were generated from a construct of three chains of Elastin- Like Polypeptides (ELP) linked to a negatively charged foldon domain. This ELP system was mixed at different ratios with a single linear chain of ELP (H40L) which was deprived of the foldon domain. The mixed system is soluble at room temperature and at a transition temperature will form swollen micelles with the hydrophobic linear chains hidden inside. This system was studied using Depolarized Dynamic Light Scattering (DDLS) and Static Light Scattering (SLS) to model the size, shape, and internal structure of the mixed micelles. The mixed …

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Life Behind Glass: Bioreactor Studies On The Salt-Water Adaptation Of Scenedesmus Dimorphus, Joshua Hartranft, Alex Fedai, Sahar Ataya Jan 2016

Life Behind Glass: Bioreactor Studies On The Salt-Water Adaptation Of Scenedesmus Dimorphus, Joshua Hartranft, Alex Fedai, Sahar Ataya

Undergraduate Research Posters 2016

Algae has considerable promise as source for liquid biofuel because of high productivity and because algae farms do not compete with food crops for arable land. Freshwater algae is preferred over saltwater algae because of the higher lipid content in the former. Unfortunately, freshwater algae “farms” would require a vast amount of fresh water, and given the scarcity of fresh water, this is not a viable long-term solution. Therefore, the adaption of a fresh-water species of algae to a salt-water environment is a potential solution. In this study, it was shown that the growth rate of the freshwater algae S. …

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Scalable Assembly Of Nanoparticles Onto Templated Substrates, John Juchnowski Jan 2016

Scalable Assembly Of Nanoparticles Onto Templated Substrates, John Juchnowski

Undergraduate Research Posters 2016

Anisotropic nanoparticles, such as carbon nanotubes and noble metal nanorods, have excellent electrical, mechanical, and thermal properties. This work examined techniques for the nanopatterning of silicon substrates for the subsequent deposition of anisotropic nanoparticles in order to exploit their properties in macroscopic applications. Argon-ion-sputter induced rippling of Si (100) as well as a microparticle mask were examined as methods for templating a silicon substrate. For the ion-sputter

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Identifying Patterns Of Stress Through Biological Markers, Kristyn Oravec Jan 2016

Identifying Patterns Of Stress Through Biological Markers, Kristyn Oravec

Undergraduate Research Posters 2016

technique, the angle of incidence of the ion beam was 67° from the surface normal,

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Bachelor Of Science Esol Endorsement 2016-2017, Nova Southeastern University Jan 2016

Bachelor Of Science Esol Endorsement 2016-2017, Nova Southeastern University

Abraham S. Fischler College of Education and School of Criminal Justice Undergraduate Course Catalogs

No abstract provided.

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Lazer: Distributed Memory-Efficient Assembly Of Large-Scale Genomes, Sayan Goswami, Arghya Kusum Das, Richard Platania, Kisung Lee, Seung Jong Park Jan 2016

Lazer: Distributed Memory-Efficient Assembly Of Large-Scale Genomes, Sayan Goswami, Arghya Kusum Das, Richard Platania, Kisung Lee, Seung Jong Park

Computer Science Faculty Research & Creative Works

Genome sequencing technology has witnessed tremendous progress in terms of throughput as well as cost per base pair, resulting in an explosion in the size of data. Consequently, typical sequence assembly tools demand a lot of processing power and memory and are unable to assemble big datasets unless run on hundreds of nodes. In this paper, we present a distributed assembler that achieves both scalability and memory efficiency by using partitioned de Bruijn graphs. By enhancing the memory-to-disk swapping and reducing the network communication in the cluster, we can assemble large sequences such as human genomes (452 GB) on just …

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Hlarp7 C-Terminal Domain Contains An Xrrm That Binds The 3' Hairpin Of 7sk Rna, Catherine D. Eichhorn, Rahul Chug, Juli Feigon Jan 2016

Hlarp7 C-Terminal Domain Contains An Xrrm That Binds The 3' Hairpin Of 7sk Rna, Catherine D. Eichhorn, Rahul Chug, Juli Feigon

Department of Chemistry: Faculty Publications

The 7SK small nuclear ribonucleoprotein (snRNP) sequesters and inactivates the positive transcription elongation factor b (P-TEFb), an essential eukaryotic mRNA transcription factor. The human La-related protein group 7 (hLARP7) is a constitutive component of the 7SK snRNP and localizes to the 3' terminus of the 7SK long noncoding RNA. hLARP7, and in particular its C-terminal domain (CTD), is essential for 7SK RNA stability and assembly with P-TEFb. The hLARP7 N-terminal Lamodule binds and protects the 3' end from degradation, but the structural and functional role of its CTD is unclear.We report the solution NMR structure of the hLARP7 CTD and …

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Analytic Ab Initio-Based Molecular Interaction Potential For The Bro·H2O Complex, Ross D. Hoehn, Sachin D. Yeole, Sabre Kais, Joseph S. Francisco Jan 2016

Analytic Ab Initio-Based Molecular Interaction Potential For The Bro·H2O Complex, Ross D. Hoehn, Sachin D. Yeole, Sabre Kais, Joseph S. Francisco

Department of Chemistry: Faculty Publications

Radical halogen oxide species play important roles within atmospheric processes, specifically those responsible for the removal of O3. To facilitate future investigations on this family of compounds, RCCSD(T)/aug-cc-pVQZ-level electronic structure calculations were employed to generate individual-molecule optimized geometries, as well as to determine the global minimum energy structure for the BrO·H2O complex. This information facilitated the generation of several one-dimensional potential energy surface (PES) scans for the BrO·H2O complex. Scans were performed for both the ground state and the first excited state; this inclusion is due to a low-lying first electronic excited-state energy. These rigid-geometry PES …

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Ring Closures And The Hammond Postulate, Charles A. Kingsbury Jan 2016

Ring Closures And The Hammond Postulate, Charles A. Kingsbury

Department of Chemistry: Faculty Publications

This work reports an investigation of ring closure processes in relation to the Hammond postulate. Calculations favor the importance of thermodynamics, not kinetics, as the basis for the Hammond postulate. A kinetically rapid, but thermodynamically unfavorable reaction is shown to resemble product. The ease of ring closure to three-membered rings, compared to four-membered rings, is thought to be associated with conformational mobility and perhaps vibrations coupled to the reaction coordinate motion in the case of four-membered rings.

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Method For Monitoring Gaas Photocathode Heat Cleaning Temperature, Nathan B. Clayburn, Kenneth Wayne Trantham, M. Dunn, Timothy J. Gay Jan 2016

Method For Monitoring Gaas Photocathode Heat Cleaning Temperature, Nathan B. Clayburn, Kenneth Wayne Trantham, M. Dunn, Timothy J. Gay

Timothy J. Gay Publications

Before a GaAs photocathode can be activated to achieve a negative electron affinity condition, the GaAs crystal must be cleaned. This is most commonly done by ohmic, radiative, or electron bombardment heating. We report a new technique to monitor the temperature of heated GaAs photocathodes by observation with a camera. The method is robust and yields the same temperatures for different GaAs samples heated using different methods in different mounting configurations.

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U.S. Lags Behind In Many Areas Of Higher Ed, Aldemaro Romero Jr. Jan 2016

U.S. Lags Behind In Many Areas Of Higher Ed, Aldemaro Romero Jr.

Publications and Research

No abstract provided.

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Agricultural Fires In The Southeastern U.S. During Seac4Rs: Emissions Of Trace Gases And Particles And Evolution Of Ozone, Reactive Nitrogen, And Organic Aerosol, Xiaoxi Liu, Y. Zhang, L. G. Huey, R. J. Yokelson, Y. Wang, J. L. Jimenez, P. Campuzano-Jost, A. J. Beyersdorf, D. R. Blake, Y. Choi, J. M. St. Clair, J. D. Crounse, D. A. Day, G. S. Diskin, A. Ried, S. R. Hall, T. F. Hanisco, L. E. King, S. Meinardi, T. Mikoviny, B. B. Palm, J. Peischl, A. E. Perring, I. B. Pollack, T. B. Ryerson, G. Sachse, J. P. Schwarz, I. J. Simpson, D. J. Tanner, K. L. Thornhil, K. Ullmann, R. J. Weber, P. O. Wennberg Jan 2016

Agricultural Fires In The Southeastern U.S. During Seac4Rs: Emissions Of Trace Gases And Particles And Evolution Of Ozone, Reactive Nitrogen, And Organic Aerosol, Xiaoxi Liu, Y. Zhang, L. G. Huey, R. J. Yokelson, Y. Wang, J. L. Jimenez, P. Campuzano-Jost, A. J. Beyersdorf, D. R. Blake, Y. Choi, J. M. St. Clair, J. D. Crounse, D. A. Day, G. S. Diskin, A. Ried, S. R. Hall, T. F. Hanisco, L. E. King, S. Meinardi, T. Mikoviny, B. B. Palm, J. Peischl, A. E. Perring, I. B. Pollack, T. B. Ryerson, G. Sachse, J. P. Schwarz, I. J. Simpson, D. J. Tanner, K. L. Thornhil, K. Ullmann, R. J. Weber, P. O. Wennberg

Chemistry and Biochemistry Faculty Publications

Emissions from 15 agricultural fires in the southeastern U.S. were measured from the NASA DC-8 research aircraft during the summer 2013 Studies of Emissions and Atmospheric Composition, Clouds and Climate Coupling by Regional Surveys (SEAC4RS) campaign. This study reports a detailed set of emission factors (EFs) for 25 trace gases and 6 fine particle species. The chemical evolution of the primary emissions in seven plumes was examined in detail for ~1.2 h. A Lagrangian plume cross-section model was used to simulate the evolution of ozone (O3), reactive nitrogen species, and organic aerosol (OA). Observed EFs are generally consistent with previous …

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Planning, Implementation, And Scientific Goals Of The Studies Of Emissions And Atmospheric Composition, Clouds And Climate Coupling By Regional Surveys (Seac4Rs) Field Mission, Owen B. Toon, Hal Maring, Jack Dibb, Richard Ferrare, Daniel J. Jacob, Eric J. Jensen, Z. Johnny Luo, Gerald G. Mace, Laura L. Pan, Lenny Pfister, Karen H. Rosenlof, Jens Redemann, Jeffrey S. Reid, Hanwant B. Singh, Anne M. Thompson, Robert Yokelson, Patrick Minnis, Gao Chen, Kenneth W. Jucks, Alex Pszenny Jan 2016

Planning, Implementation, And Scientific Goals Of The Studies Of Emissions And Atmospheric Composition, Clouds And Climate Coupling By Regional Surveys (Seac4Rs) Field Mission, Owen B. Toon, Hal Maring, Jack Dibb, Richard Ferrare, Daniel J. Jacob, Eric J. Jensen, Z. Johnny Luo, Gerald G. Mace, Laura L. Pan, Lenny Pfister, Karen H. Rosenlof, Jens Redemann, Jeffrey S. Reid, Hanwant B. Singh, Anne M. Thompson, Robert Yokelson, Patrick Minnis, Gao Chen, Kenneth W. Jucks, Alex Pszenny

Chemistry and Biochemistry Faculty Publications

The Studies of Emissions and Atmospheric Composition, Clouds and Climate Coupling by Regional Surveys (SEAC4RS) fieldmission based at Ellington Field, Texas, during August and September 2013 employed the most comprehensive airborne payload to date to investigate atmospheric composition over North America. The NASA ER-2, DC-8, and SPEC Inc. Learjet flew 57 science flights fromthe surface to 20 km. The ER-2 employed seven remote sensing instruments as a satellite surrogate and eight in situ instruments. The DC-8 employed 23 in situ and five remote sensing instruments for radiation, chemistry, and microphysics. The Learjet used 11 instruments to explore cloud microphysics. SEAC4RS …

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Ice-Nucleating Particle Emissions From Biomass Combustion And The Potential Importance Of Soot Aerosol, E. J.T. Levin, G. R. Mcmeeking, P. J. Demott, C. S. Mccluskey, C. M. Carrico, S. Nakao, T. Jayarathne, E. A. Stone, C. E. Stockwell, R. J. Yokelson, S. M. Kreidenweis Jan 2016

Ice-Nucleating Particle Emissions From Biomass Combustion And The Potential Importance Of Soot Aerosol, E. J.T. Levin, G. R. Mcmeeking, P. J. Demott, C. S. Mccluskey, C. M. Carrico, S. Nakao, T. Jayarathne, E. A. Stone, C. E. Stockwell, R. J. Yokelson, S. M. Kreidenweis

Chemistry and Biochemistry Faculty Publications

Ice-nucleating particles (INPs) are required for initial ice crystal formation in clouds at temperatures warmer than about -36°C and thus play a crucial role in cloud and precipitation formation. Biomass burning has been found to be a source of INPs in previous studies and is also a major contributor to atmospheric black carbon (BC) concentrations. This study focuses on isolating the BC contribution to the INP population associated with biomass combustion. Emissions of condensation mode INPs from a number of globally relevant biomass fuels were measured at -30°C and above water saturation as fires progressed from ignition to extinguishment in …

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Rapidly Evolving Ultrafine And Fine Mode Biomass Smoke Physical Properties: Comparing Laboratory And Field Results, Christian M. Carrico, Anthony J. Prenni, Sonia M. Kreidenweis, Ezra J.T. Levin, Christina S. Mccluskey, Paul J. Demott, Gavin R. Mcmeeking, Shunsuke Nakao, Chelsea Stockwell, Robert J. Yokelson Jan 2016

Rapidly Evolving Ultrafine And Fine Mode Biomass Smoke Physical Properties: Comparing Laboratory And Field Results, Christian M. Carrico, Anthony J. Prenni, Sonia M. Kreidenweis, Ezra J.T. Levin, Christina S. Mccluskey, Paul J. Demott, Gavin R. Mcmeeking, Shunsuke Nakao, Chelsea Stockwell, Robert J. Yokelson

Chemistry and Biochemistry Faculty Publications

Combining field and laboratory results, we present biomass smoke physical properties. We report sub-0.56 µm diameter (Dp) particle sizing (fast mobility particle sizer, FMPS) plus light absorption and scattering at 870nm (photoacoustic extinctiometer). For Dp<200 >nm, the FMPS characterized sizing within ±20% compared to standards. As compared to the traditional scanning mobility particle sizer, the FMPS responded most accurately to single-mode polydispersions with mean Dp<200 >nm, which characterized the smoke sampled here. Smoke was measured from laboratory fresh emissions (seconds to hours old), the High Park Fire (hours to<1 >day), and from regional biomass burning (several days). During a High …

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Quantile Regression Analyses Of The Component Skills In Various Comprehension Tests, Anh Ngoc Hua Jan 2016

Quantile Regression Analyses Of The Component Skills In Various Comprehension Tests, Anh Ngoc Hua

Electronic Theses and Dissertations

Many studies to date have examined cognitive factors that drive individual differences in reading comprehension. However, these studies often focused on typical readers, and it is not clear whether their findings apply similarly to readers performing in the extreme ends of the distribution, i.e., poor and good readers. In this dissertation, we used quantile regression on a sample of 834 children (age 8-18) to advance our understanding of the relative importance of different component processes of comprehension not just for the typical but also for poor and skilled readers. In Study 1, we examined how the relative importance of components …

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The Spatial Distribution Of Terrestrial Stable Carbon Isotopes In North America, And The Impacts Of Spatial And Temporal Resolution On Static Ecological Models, Sydney M. Firmin Jan 2016

The Spatial Distribution Of Terrestrial Stable Carbon Isotopes In North America, And The Impacts Of Spatial And Temporal Resolution On Static Ecological Models, Sydney M. Firmin

Electronic Theses and Dissertations

Due to the unique spatial and temporal characteristics of ecological phenomena, the extent and grain size of spatial data sets essentially filter the observations. This thesis examines the impacts of temporal and spatial resolution on the modeling of terrestrial stable carbon isotopic landscapes (isoscapes). I model the distribution of leaf stable carbon isotope composition (delta13C) for the continent of North America at multiple temporal and spatial resolutions. I generate each delta13C isoscape variation by first predicting the relative abundance of C3/C4 vegetation cover using monthly climate grids, crop distribution/type grids, and remote sensing data of plant …

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