Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Other

Discipline
Institution
Keyword
Publication Year
Publication
Publication Type

Articles 16291 - 16320 of 25826

Full-Text Articles in Entire DC Network

Chemostratigraphy And Paleoenvironment Of The Haynesville Formation, Harrison County, Texas, Nidal R. Jabri Jan 2013

Chemostratigraphy And Paleoenvironment Of The Haynesville Formation, Harrison County, Texas, Nidal R. Jabri

Earth & Environmental Sciences Theses - Archive

The Late Jurassic (Kimmeridgian) Haynesville formation consist of post rift siliciclastics, carbonate, and evaporite deposits that accumulated in continental to deeper marine environments on an asymmetrical basin where topography was modified by salt and basement tectonics. The Haynesville stretches from East Texas to West Louisiana, deposited on the Smackover lime and overlayed by the slightly coarser grained Bossier Formation and the interbedded sands of the Cotton Valley Formation in some places. Complex basin morphology and later stage salt tectonics have played an important role in the development of the sediment fill. The evacuation of salt from overburden increased accommodation space. …

Go to article

Major, Minor And Trace Element Geochemistry Of The Eagle Ford Formation, South Texas, Shariva T.R. Darmaoen Jan 2013

Major, Minor And Trace Element Geochemistry Of The Eagle Ford Formation, South Texas, Shariva T.R. Darmaoen

Earth & Environmental Sciences Theses - Archive

Major, minor and trace element concentrations analyzed through hand-held ED-XRF and several laboratory techniques characterize geochemical heterogeneity in strata that appear homogeneous within the Eagle Ford Formation. Two major facies were discovered in the study area; one that is rich in carbonates toward the southwest and another that increases in clay minerals toward the northeast. Both facies are enriched in proxies of micronutrients for planktonic organisms. Nutrients precipitated by two possible mechanisms; volcanic input or nutrient cycling from Large Igneous Provinces through upwelling of bottom waters. The provenance indicating rare earth element pattern for both facies deviate from average shale …

Go to article

Viewing The Champ-Elysses As A Transitional Space, Staci L. Swiney Jan 2013

Viewing The Champ-Elysses As A Transitional Space, Staci L. Swiney

History Theses - Archive

Today the Champs-Élysées serves as one of the most iconic boulevards in the world; however, in the eighteenth century the area functioned similar to a modern day park. The transitional space provided fresh air and entertainment to the citizens of Paris.Contemporary documents illustrate both the many uses of the Champs-Élysées and the Comte d'Angiviller's determination to conserve the area as a transitional space. Although ultimately Angiviller failed to preserve the Champs-Élysées, he deserves recognition, as his efforts predate the park movement by nearly sixty years.

Go to article

The Walloon Immigrants Of Northeast Wisconsin: An Examination Of Ethnic Retention, Jacqueline Lee Tinkler Jan 2013

The Walloon Immigrants Of Northeast Wisconsin: An Examination Of Ethnic Retention, Jacqueline Lee Tinkler

History Theses - Archive

This thesis examines the unusually enduring retention of ethnic culture by the Walloon Belgian immigrants who settled in northeastern Wisconsin between 1853 and 1857, as well as the combination of circumstances which enabled this ethnic island to form and continue, well into the twenty-first century. A review of the historiography focusing on European immigrants to the United States from the post-revolutionary period to the present reveals an emphasis on urban settlement and the assumed inevitability of the weakening of ethnic identity. Less attention has been given those immigrants settling in rural areas and even less to those few rural immigrant …

Go to article

In The Shade Of The Mushroom Clouds: How Christian Fudamentalists Sabotaged Atomic Scientists' Visions Of Utopia, Robert Edward Fuller Jan 2013

In The Shade Of The Mushroom Clouds: How Christian Fudamentalists Sabotaged Atomic Scientists' Visions Of Utopia, Robert Edward Fuller

History Theses - Archive

Prior to August 6, 1945, the end of the world had been an abstract concept left to the gods to enact via supernatural means. Yet on that day, humanity saw for the first time the actual mechanism whereby it might end the world. So it was that in the aftermath of Hiroshima, two diametrically opposed messages emerged to give Americans a framework in which to assimilate the advent of nuclear weaponry. The first, articulated by atomic scientists and other intellectuals, reasoned that the threat of nuclear annihilation meant that war must be abolished through the formation of a One World …

Go to article

Development Of A Model To Simulate The Single-Limb Stance Phase Of Walking To Determine The Limits Of Stability, Clifford Lee Hancock Jan 2013

Development Of A Model To Simulate The Single-Limb Stance Phase Of Walking To Determine The Limits Of Stability, Clifford Lee Hancock

Bioengineering Theses - Archive

Falls during walking are the primary cause of injuries for older persons and present a high associated cost to society due to the resulting treatment. Hence, the control of balance while moving is an essential issue especially amongst the elderly population. Better understanding of why and how these falls occur could lead to better fall prevention methods, therapies, or devices. These changes could effectively decrease overall emergency room visits, create more room in hospitals for other demands, and decrease medical costs for fall-related disabilities and deaths amongst patients overall. This study attempted to develop an inverted pendulum model of the …

Go to article

Microfluidic Device For Determining Preferential Cell Migration Toward Extracellular Matrix Proteins, Neil Hall Jan 2013

Microfluidic Device For Determining Preferential Cell Migration Toward Extracellular Matrix Proteins, Neil Hall

Bioengineering Theses - Archive

Extracellular matrix (ECM) proteins interact with cells in bodily microenvironments by influencing their essential cellular processes in growth, survival, migration and repair after injury. In this study, a novel microfluidic device was developed to study preferential interactions of cells with multiple extracellular matrix proteins simultaneously in an unbiased manner. The implementation of PDITC-treated glass and a controlled laminar flow of multiple separated, soluble proteins was used to create an unbiased microenvironment in which ECM proteins are adsorbed on the glass surface in a manner that simultaneously exposes cells to multiple proteins, and allows them to migrate or outgrow toward the …

Go to article

Recombinant Expression, Purification And Kinetic Characterization Of F₄₂₀-Cofactor Dependent Glucose-6-Phosphate Dehydrogenase From Mycobacterium Tuberculosis, Tijani Osumah Jan 2013

Recombinant Expression, Purification And Kinetic Characterization Of F₄₂₀-Cofactor Dependent Glucose-6-Phosphate Dehydrogenase From Mycobacterium Tuberculosis, Tijani Osumah

Bioengineering Theses - Archive

The FGD (F₄₂₀-dependent Glucose-6-phosphate dehydrogenase) enzyme is an F₄₂₀ Cofactor (7,8-didemethyl-8-hydroxy-5-deazariboflavin) dependent enzyme found in Mycobacterium tuberculosis, the causative agent of tuberculosis (TB). TB is still a prominent cause of illness and death worldwide. Because FGD is not found in humans, makes it a good target for drug development. By understanding the hydride transfer mechanism of the FGD in detail, we can aid in the improvement of drug targeting and development for the treatment of TB. FGD catalyzes the conversion of glucose-6-phosphate to 6-phosophogluconolactone. This project focuses on the purification and kinetic characterization of recombinant FGD using steady-state and pre-steady …

Go to article

Local And Watershed Influences On The Species Composition And Functional Organization Of Stream Diatom Communities In The Acid-Impacted Adirondack Region Of New York, Katrina Lynn Pound Jan 2013

Local And Watershed Influences On The Species Composition And Functional Organization Of Stream Diatom Communities In The Acid-Impacted Adirondack Region Of New York, Katrina Lynn Pound

Biology Dissertations - Archive

For over 40 years, acid deposition has been recognized as a serious international environmental problem, but efforts to restore acidified streams and biota have had limited success. The need to better understand the effects of different sources of acidity on streams has become more pressing with the recent increases in surface water organic acids, or `brownification', associated with climate change and decreased acid deposition. This dissertation is a large scale multi-seasonal investigation of stream diatom communities in the Adirondack region of New York, one of the most acid-impacted regions in the United States. My first objective is to explore the …

Go to article

Biological Relevance Of Jaz Proteins In The Interaction Between Pseudomonas Syrinage And Arabiopsis Thaliana, Nisita Obulareddy Jan 2013

Biological Relevance Of Jaz Proteins In The Interaction Between Pseudomonas Syrinage And Arabiopsis Thaliana, Nisita Obulareddy

Biology Dissertations - Archive

Stomata, micro-pores on the leaf surface, are formed by a pair of guard cells. In addition to controlling water loss and gas exchange between the plant and the environment, these cells act as immunity gates to prevent pathogen invasion of the plant apoplast. Some Plant pathogens produce virulence factors that enable them to reopen the stomatal immunity gates to favor bacterial entry. Pseudomonas syringae pv. Tomato strain DC3000 (Pst DC3000) produces a phytotoxin called coronatine that assists pathogen entry via re-opening the closed stomata. Earlier studies report that Pst DC3000 regulates a family of genes called JASMONATE ZIM-DOMAIN (JAZ) genes …

Go to article

Role Of The Extracytoplasmic Function Sigma Factor Carq In Oxidative Response Of Bradyrhizobium Japonicum, Anchana Thaweethawakorn Jan 2013

Role Of The Extracytoplasmic Function Sigma Factor Carq In Oxidative Response Of Bradyrhizobium Japonicum, Anchana Thaweethawakorn

Biology Theses - Archive

Bradyrhizobium japonicum is a nitrogen-fixing bacterium that can establish a symbiotic relationship with the soybean plant. To be a successful symbiont, B. japonicum must have an effective mechanism to deal with plant defense responses such as oxidative burst. Our previous transcriptomic study showed that carQ (bll1028) encoding extracytoplasmic function (ECF) sigma factor was highly expressed (108-fold induction) in response to Hâ‚‚Oâ‚‚-mediated oxidative stress. In this study, a carQ knock-out mutant was constructed to identify the role of carQ in the oxidative response of B. japonicum. The mutant exhibited a significant decrease in survival at 10 mM Hâ‚‚Oâ‚‚ for 10 min …

Go to article

Improving Cooling Efficiency Of Servers By Replacing Smaller Chassis Enclosed Fans With Larger Rack-Mount Fans, Bharath Nagendran Jan 2013

Improving Cooling Efficiency Of Servers By Replacing Smaller Chassis Enclosed Fans With Larger Rack-Mount Fans, Bharath Nagendran

Mechanical and Aerospace Engineering Theses - Archive

As a common practice in the data center industry, chassis fans are used to direct air flow independent from neighboring servers. However, these fans are less efficient compared to larger rack level counterparts and also operate at higher sound levels. In this study, a novel approach is proposed whereby the smaller chassis enclosed fans are replaced with an array of larger fans, installed behind the stacked servers that share air flow. As a baseline study for comparison of the current scenario, a CPU dominated 1.5U Open Compute server, with four 60mm fans installed within the server, is characterized experimentally for …

Go to article

Comparative Analysis Of Widely Used Air Containment Systems In Commercial Data Centers For Maximum Cooling Performance, Kasturi Rangan Rajagopalan Jan 2013

Comparative Analysis Of Widely Used Air Containment Systems In Commercial Data Centers For Maximum Cooling Performance, Kasturi Rangan Rajagopalan

Mechanical and Aerospace Engineering Theses - Archive

Many data centers implement containment systems to improve cooling system performance. Literature review shows that Hot Aisle Containment System (HACS) have higher supply air temperature set point than Cold Aisle Containment Systems (CACS) [1]. CACS in data centers have claims to support higher density loads when compared to HACS systems [2]. Data center owners suggest that containment of a group of racks can be a very effective technique to improve cooling performance. On the other hand, others suggest that fewer area for containment is better than no containment in data centers that favours the partially contained architectures of HACS and …

Go to article

Real Time Temperature Prediction In A Data Center Environment Using An Adaptive Algorithm, Vishok Amar Kumar Jan 2013

Real Time Temperature Prediction In A Data Center Environment Using An Adaptive Algorithm, Vishok Amar Kumar

Mechanical and Aerospace Engineering Theses - Archive

Most organizations around the world rely on information systems to run their operations. Data centers are hence a crucial aspect of most organizational operations to ensure business continuity. Disruption in the working of a system can impair the business largely and hence optimizing the environment in which the servers and storage devises of a data center are housed becomes extremely challenging. Most industries design the data center infrastructure to handle peak load conditions thus ensuring a continual functionality of its hosted environment. However, the cost of maintaining such a system is very high. This gives rise to the need of …

Go to article

A Computational Model To Characterize Different Flow Regimes For Microscale Re-Entry Satellites, Sudharsan Thiruvenkadam Jan 2013

A Computational Model To Characterize Different Flow Regimes For Microscale Re-Entry Satellites, Sudharsan Thiruvenkadam

Mechanical and Aerospace Engineering Theses - Archive

Atmospheric re-entry vehicles experience different flow regimes during flight due to the change in atmospheric density along the re-entry trajectory. This change in density creates non-equilibrium regions on the order of mean free path, called Knudsen layer. In the design of atmospheric re-entry vehicles, the flux variations near the wall of the re-entry vehicles are of critical importance. Traditional CFD simulations that use Navier-Stokes equations fail to predict the flow in the Knudsen layer. The Direct Simulation Monte Carlo (DSMC) method is accurate for all flow regimes, and correctly models the Knudsen layer but is computationally expensive. The computational cost …

Go to article

City Of Arlington, Texas, Blackland Prairie Preserve Master Plan, David Hopman, Dfl Group Llc Jan 2013

City Of Arlington, Texas, Blackland Prairie Preserve Master Plan, David Hopman, Dfl Group Llc

Landscape Architecture Faculty Publications - Archive

The City of Arlington acquired the Blackland Prairie site in 1998 after a group of concerned citizens identified its value as possibly the last blackland prairie remnant site in the city. Encouraged by the Arlington Conservation Council, the land was purchased by the city to be held as permanent open space. In its current condition, the site remains in transition. Efforts by volunteers have helped maintain native prairie grasses on approximately half of the site. The eastern half however, has remained untouched since acquisition. Invasive grasses, woody and herbaceous plants continue to proliferate in this area, leaving relatively few native …

Go to article

Fabrication And Characterization Of Single Electron Device And Study Of Energy Filtering In Single Electron Transport, Liang-Chieh Ma Jan 2013

Fabrication And Characterization Of Single Electron Device And Study Of Energy Filtering In Single Electron Transport, Liang-Chieh Ma

Material Science and Engineering Dissertations - Archive

Single electron devices, in which transport of single electrons is precisely controlled, hold a great promise as important components of future electronic devices and sensors. However, technical challenges have prevented their implementations to practical electronic and sensing systems. First of all, the fabrication of single electron devices requires their components to be defined and arranged in nanoscale precision, a great challenge for a large-scale fabrication. Secondly, for room temperature operation, the single-electron charging energy should be much larger than the room-temperature thermal energy, ~25 meV, requiring use of extremely small Coulomb island, which is difficult to control. This has limited …

Go to article

Corrosion And Hydrogen Embrittlement Of Nanocrystalline Nickel, Tapas Desai Jan 2013

Corrosion And Hydrogen Embrittlement Of Nanocrystalline Nickel, Tapas Desai

Material Science and Engineering Theses - Archive

Nanocrystalline (nc) materials have attracted the interest of the scientific community because of their unique physical and mechanical properties. However, limited research has been performed to analyze their electrochemical behavior. The majority of research in the field of electrochemical and corrosion behavior exists for electrodeposited nanocrystalline metals.This research studies the behavior of sputter-deposited nc Nickel films in corrosive and hydrogen environment by potentiodynamic polarization and microindentation. The surface morphology and composition of the samples was examined by Scanning Electron Microscopy and Energy Dispersive X-Ray spectroscopy. Bulk Ni samples exhibit mild passivation in 3.5 % NaCl solution. The surface reveals a …

Go to article

Smooth Quantile Processes For Right Censored Data, Katsuhiro Uechi Jan 2013

Smooth Quantile Processes For Right Censored Data, Katsuhiro Uechi

Mathematics Dissertations - Archive

The development of an estimator of a quantile function Q(p) is discussed. The smooth nonparametric estimator Qn(p) of a quantile function Q(p) is defined as the solution to Fn(Qn(p)) = p, where Fn is a smooth Kaplan-Meier estimator of an unknown continuous distribution function F(x). The asymptotic properties of the smooth quantile process, n(Qn(p) - Q(p)) , based on right censored lifetimes are studied. The asymptotic properties of the bootstrap quantile process, n(Q n(p) - Q(p)) are also investigated and shown to have the same limiting distribution as the smooth quantile process. The bootstrap method to approximate the sampling distribution …

Go to article

The Generalized Two-Component Hunter-Saxton System, Byungsoo Moon Jan 2013

The Generalized Two-Component Hunter-Saxton System, Byungsoo Moon

Mathematics Dissertations - Archive

This thesis is concerned with the generalized two-component Hunter-Saxton system. In the periodic setting, we study the wave-breaking phenomenon and global existence for the generalized two-component Hunter-Saxton system. We obtain a brief derivation of the model. We also briefly sketch a standard local well-posednessresult using Kato's semigroup approach. We establish a wave-breaking criterion for solutions and some interesting results of wave-breaking solutions with certain initial profiles. We demonstrate the exact blow-up rate of strong solutions. Finally, we give a sufficient condition for global solutions.

Go to article

Literacy For All In 100 Days? A Research Based Strategy For Fast Progress In Low Income Countries, Helen Abadzi Jan 2013

Literacy For All In 100 Days? A Research Based Strategy For Fast Progress In Low Income Countries, Helen Abadzi

Curriculum and Instruction Faculty Publications - Archive

In low-income countries many students are marginalized very early and remain illiterate. In grades 1-3 they attend rarely, though they may officially drop out in grade 4. Many others graduate from primary school without having learned letter values. The worrisome outcomes, despite much donor investment in low-income countries, have prompted scrutiny of the methods, and textbooks used to make students literate. This document offers insights from cognitive neuroscience and evidence suggesting that students can be taught basic literacy within the first semester of grade 1, if taught in consistently spelled languages. Teaching students at risk of dropout to read as …

Go to article

Improving Productivity Of Tunnel Boring Machines, Nicholas Jencopale Jan 2013

Improving Productivity Of Tunnel Boring Machines, Nicholas Jencopale

Civil Engineering Theses - Archive

Tunneling with tunnel boring machines (TBMs) is one of the most mechanized and sophisticated processes within the construction industry. However, there are risks when venturing down several hundred feet where the conditions cannot be accurately determined in advance. Months and years of planning, engineering, profiling, researching, and scheduling go into a typical tunneling project before any ground breaking event. This thesis will discuss in detail the growing technologies of the tunneling process using tunnel boring machines (TBM). First, some background information on tunneling and the use of a TBM will be provided to introduce the process and the industry being …

Go to article

Corrosion Potentials Of Lightweight Concrete Wrapped With Fiber Reinforced Polymers (Frp), Eric Goucher Jan 2013

Corrosion Potentials Of Lightweight Concrete Wrapped With Fiber Reinforced Polymers (Frp), Eric Goucher

Civil Engineering Theses - Archive

The purpose of this research was to investigate the effects of Fiber Reinforced Polymer wraps on corrosion protection of lightweight concrete. Many studies have been undertaken for normal density concrete, but there are very few studies regarding lightweight concrete and externally bonded FRP wraps. This experiment involved the use of an accelerated corrosion test to determine the corrosion protection that FRP would afford lightweight concrete, while making a comparison with a similarly proportioned normalweight mix. 42 cylinders were subject to a constant 12 V power from a DC Power Supply while being immersed in a 5% NaCl for a period …

Go to article

Structural And Material Performance Of Rubberized And Hybrid Concrete Pipes, Mohammad Mohammadagha Jan 2013

Structural And Material Performance Of Rubberized And Hybrid Concrete Pipes, Mohammad Mohammadagha

Civil Engineering Theses - Archive

This study investigates how the combination of steel fiber, crumb rubber, synthetic fiber, and conventional steel cage will improve the ductility of regular concrete pipes and thin-walled semi-rigid concrete pipes. In this study, pipes with four different concrete mixtures were produced and tested: (1) Steel Bar Reinforced Concrete Pipe (SBRCP), (2) Crumb Rubber Reinforced Concrete Pipe (CRRCP), (3) Steel Fiber Reinforced Concrete Pipe (SFRCP), and (4) Synthetic Fiber Reinforced Concrete Pipe (SNFRCP). This study investigates how the variation of the fiber volume fraction and crumb rubber content in concrete mix affects the behavior of pipes with diameters ranging from 24in. …

Go to article

Ensemble Streamflow Forecasting For The Upper Trinity River Basin In Texas, Manabendra Saharia Jan 2013

Ensemble Streamflow Forecasting For The Upper Trinity River Basin In Texas, Manabendra Saharia

Civil Engineering Theses - Archive

By allowing for routine use of longer-lead quantitative precipitation forecast (QPF) in hydrologic prediction, ensemble forecasting offers hope for extending the lead time for short-range streamflow forecasting. In this work, this potential is assessed by comparatively evaluating ensemble streamflow hindcasts forced by Day 1-3 QPF with those forced by Day 1 QPF for five headwater basins in the Upper Trinity River Basin in North Texas. The hindcasts are generated for a 7-year period of 2004 to 2010 using the Hydrologic Ensemble Forecast Service (HEFS), which operates on the Community Hydrologic Prediction System (CHPS) of the National Weather Service (NWS). HEFS …

Go to article

The Relation Between Freeway Average Speed And Speed Noise, Bahar Zarin Jan 2013

The Relation Between Freeway Average Speed And Speed Noise, Bahar Zarin

Civil Engineering Theses - Archive

A significant amount of energy could be saved by applying traffic management policies. Many factors affect the fuel consumption rate, and the most important traffic-related ones include variables such as speed, number of stops, the speed noise, and the acceleration noise. Fuel consumption models for both urban and highway traffic are used to evaluate the effect of these factors. Previous literature shows the speed and the acceleration of the individual vehicles as well as the aero-dynamic effects are the most considered parameters in highway fuel consumption models. However, the existing models are based on the average or cruising speed and …

Go to article

Overvaluation And Stock Price Crashes: The Effects Of Earnings Management, Qunfeng Liao Jan 2013

Overvaluation And Stock Price Crashes: The Effects Of Earnings Management, Qunfeng Liao

Accounting Dissertations - Archive

Prior literature has shown that managers have incentives to opportunistically and selectively withhold bad news from investors because of career concerns, compensation contracts, litigation risks, earnings targets, and empire building. In their 2006 paper, Jin and Myers develop the “Bad News Hoarding” theory which suggests that when managers conceal bad news for extended periods of time, negative information is likely to get stockpiled within the firm. When managers’ incentives for hiding bad news collapse or when the accumulation of bad news reaches a critical threshold level, all of the hitherto undisclosed negative firm-specific shocks become public at once, resulting in …

Go to article

The Role Of Individual Attributes In Earnings Management Intention Decisions, Janet R. Jones Jan 2013

The Role Of Individual Attributes In Earnings Management Intention Decisions, Janet R. Jones

Accounting Dissertations - Archive

Much research has been conducted, at the firm level, to investigate the market effect of earnings management. However, there is a gap in the literature on individual attributes that may help to explain earnings management decisions. Of the research at individual level research that is available the focus is primarily on the motives of the Chief Executive Officer or top executive teams and not the Chief Financial Officer (CFO). The limited research focusing on the CFO has produced conflicting results with regard to the motivations and decisions of the CFO to engage in earnings management, this conflict in findings stems …

Go to article

Studying Overseas: Factors Impacting Intention Of Female Students In Mainland China, Yi Zhang, Jie Sun, Linda Serra Hagedorn Jan 2013

Studying Overseas: Factors Impacting Intention Of Female Students In Mainland China, Yi Zhang, Jie Sun, Linda Serra Hagedorn

Educational Leadership & Policy Studies Faculty Publications - Archive

No abstract provided.

Go to article

Inside Out: The Dialogics Of Codeswitching In Ana Castillo's So Far From God And Ibis Gómez-Vega's Send My Roots Rain, Carla L. Dye Jan 2013

Inside Out: The Dialogics Of Codeswitching In Ana Castillo's So Far From God And Ibis Gómez-Vega's Send My Roots Rain, Carla L. Dye

English Theses - Archive

In the process of narration, codeswitching, the use of words from one or more language by the same speaker within the same speech situation, reflects certain resistant strategies within the written text, forging a bridge to introduce alternative or alien viewpoints. Because languages develop, change, and often merge over time, reflecting societal and political shifts, the practice of codeswitching in the novel opens new spaces for interpretation, expanding the dialogic interaction within the text. Inside Out takes Bakhtin's concepts of heteroglossia and dialogism with its centrifugal and centripetal influences, and examines Ana Castillo's novel So Far From God and Ibis …

Go to article

First Prev Next Last