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

Digital Commons Network™

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

2008

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 331 - 360 of 32220

Full-Text Articles in Entire DC Network

Organic Chemostratigraphic Markers Characteristic Of The (Informally Designated) Anthropocene Epoch, Michael A. Kruge Dec 2008

Organic Chemostratigraphic Markers Characteristic Of The (Informally Designated) Anthropocene Epoch, Michael A. Kruge

Department of Earth and Environmental Studies Faculty Scholarship and Creative Works

Recognizing the tremendous collective impact of humans on the environment in the industrial age, the proposed designation of the current time period as the Anthropocene Epoch has considerable merit. One of the signature activities during this time continues to be the intensive extraction, processing, and combustion of fossil fuels. While fossil fuels themselves are naturally-occurring, they are most often millions of years old and associated with deeply buried strata. They may be found at the surface, for example, as natural oil seeps or coal seam outcrops, but these are relatively rare occurrences. Fossil fuels and their myriad by-products become the …

Go to article

Transport-Based Dopant Metrology In Advanced Finfets, Gabriel P. Lansbergen, Rajib Rahman, Cameron J. Wellard, Jaap Caro, Nadine Collaert, Serge Biesemans, Gerhard Klimeck, Lloyd C. L. Hollenberg, Sven Rogge Dec 2008

Transport-Based Dopant Metrology In Advanced Finfets, Gabriel P. Lansbergen, Rajib Rahman, Cameron J. Wellard, Jaap Caro, Nadine Collaert, Serge Biesemans, Gerhard Klimeck, Lloyd C. L. Hollenberg, Sven Rogge

Other Nanotechnology Publications

Ultra-scaled FinFET transistors bear unique fingerprint-like device-to-device differences attributed to random single impurities. Through correlation of experimental data with multimillion atom simulations in NEMO 3-D, we can identify the impurity’s chemical species and determine their concentration, local electric field and depth below the Si/SiO2 interface. The ability to model the excited states rather than just the ground states is the critical need. We therefore demonstrate a new approach to atomistic impurity metrology and confirm the assumption of tunneling through individual impurity quantum states.

Go to article

Atomic-Layer-Deposited Al2o3/Gaas Metal-Oxide-Semiconductor Field-Effect Transistor On Si Substrate Using Aspect Ratio Trapping Technique, Y Q. Wu, M Xu, P. D. Ye, Z Cheng, J Li, J Park, J Hydrick, J Bai, M Carroll, J G. Fiorenza, A Lochtefeld Dec 2008

Atomic-Layer-Deposited Al2o3/Gaas Metal-Oxide-Semiconductor Field-Effect Transistor On Si Substrate Using Aspect Ratio Trapping Technique, Y Q. Wu, M Xu, P. D. Ye, Z Cheng, J Li, J Park, J Hydrick, J Bai, M Carroll, J G. Fiorenza, A Lochtefeld

Birck and NCN Publications

High quality GaAs epilayers grown by metal-organic chemical vapor deposition are demonstrated on a SiO2-patterned silicon substrate using aspect ratio trapping technique, whereby threading dislocations from lattice mismatch are largely reduced via trapping in SiO2 trenches during growth. A depletion-mode metal-oxide-semiconductor field-effect transistor (MOSFET) is demonstrated on a n-doped GaAs channel with atomic-layer deposited Al2O3 as the gate oxide. The 10 mu m gate length transistor has a maximum drain current of 88 mA/mm and a transconductance of 19 mS/mm. The surface mobility estimated from the accumulation drain current has a peak value of similar to 500 cm(2)/Vs, which is …

Go to article

Full-Band And Atomisic Simulation Of Realistic 40 Nm Inas Hemt, Mathieu Luisier, Neophytos Neophytou, Neerav Kharche, Gerhard Klimeck Dec 2008

Full-Band And Atomisic Simulation Of Realistic 40 Nm Inas Hemt, Mathieu Luisier, Neophytos Neophytou, Neerav Kharche, Gerhard Klimeck

Other Nanotechnology Publications

A realistic 40 nm InAs high electron mobility transistor is studied using a two-dimensional, full-band, and atomistic Schr¨odinger-Poisson solver based on the sp3d5s∗ tightbinding model. Bandstructure non-parabolicity effects, strain, alloy disorder in the InGaAs and InAlAs barriers, as well as band-to-band tunneling in the transistor OFF-state are automatically included through the full-band atomistic model. The source and drain contact extensions are taken into account a posteriori by adding two series resistances to the device channel. The simulated current characteristics are compared to measured data and show a good quantitative agreement.

Go to article

A Multi-Level Parallel Simulation Approach To Electron Transport In Nano-Scale Transistors, Mathieu Luisier Purdue University - Main Campus, Gerhard Klimeck Dec 2008

A Multi-Level Parallel Simulation Approach To Electron Transport In Nano-Scale Transistors, Mathieu Luisier Purdue University - Main Campus, Gerhard Klimeck

Other Nanotechnology Publications

Physics-based simulation of electron transport in nanoelectronic devices requires the solution of thousands of highly complex equations to obtain the output characteristics of one single input voltage. The only way to obtain a complete set of bias points within a reasonable amount of time is the recourse to supercomputers offering several hundreds to thousands of cores. To prot from the rapidly increasing availability of such machines we have developed a state-of-the-art quantum mechanical transport simulator dedicated to nanodevices and working with four levels of parallelism. Using these four levels we demonstrate that an almost ideal scaling of the walltime up …

Go to article

From Nemo1d And Nemo3d To Omen: Moving Towards Atomistic 3-D Quantum Transport In Nano-Scale Semiconductors, Gerhard Klimeck, Mathieu Luisier Dec 2008

From Nemo1d And Nemo3d To Omen: Moving Towards Atomistic 3-D Quantum Transport In Nano-Scale Semiconductors, Gerhard Klimeck, Mathieu Luisier

Other Nanotechnology Publications

Lessons learned in 15 years of NEMO development starting from quantitative and predictive resonant tunneling diode (RTD) to multi-million atom electronic structure modeling and the path for OMEN are laid out. The recent OMEN capabilities enable realistically large 3D atomistic nano-scale device simulation.

Go to article

Theoretical Elucidation On The Corrosion Tube Growth Mechanism Of Mild Steel In The Effect Of Ph On Oxygen Corrosion At Elevated Pressures, Ming-Te Liang Dec 2008

Theoretical Elucidation On The Corrosion Tube Growth Mechanism Of Mild Steel In The Effect Of Ph On Oxygen Corrosion At Elevated Pressures, Ming-Te Liang

Journal of Marine Science and Technology–Taiwan

The major purpose of this paper is the theoretical elucidation of the corrosion tube growth mechanism of mild steel occurred from the effect of pH value and oxygen corrosion at elevated pressure provided by Riggs et al. [6]. Based on the Nernst-Planck equation, continuity principle, Green's theorem, Stokes's theorem and the equation of Newton's second law of motion, the mechanism of corrosion tube development can be explained theoretically. The Bernoulli sum is contant at any cross-section of tubular corrosion product. The implication of the present results are theoretically enhanced the formation of corrosion tube mechanism.

Go to article

Case Study Of Wind-Resistant Design And Analysis Of High Mast Structures Based On Different Wind Codes, Ching-Wen Chien, Jing-Jong Jang Dec 2008

Case Study Of Wind-Resistant Design And Analysis Of High Mast Structures Based On Different Wind Codes, Ching-Wen Chien, Jing-Jong Jang

Journal of Marine Science and Technology–Taiwan

The high mast structure (HMS) has the characters of light weight and high cost efficiency. Therefore, it is widely used in the modern construction industry. It has a large the ratio of height (H) to least horizontal dimension (D) that makes it a particularly more slender and wind-sensitive than any other structures. Therefore, the purpose of this research is to develop the wind-resistant design (WRD) procedure for the slender, tapered support structures of HMS subjected to wind-induced excitation from vortex shedding and gust buffeting. This paper illustrates the theoretical basis and the analytical development of the WRD; including calculating gust …

Go to article

Confidence Intervals For A Common Mean With Missing Data With Applications In An Aids Study, Hua Liang, Haiyan Su, Guohua Zou Dec 2008

Confidence Intervals For A Common Mean With Missing Data With Applications In An Aids Study, Hua Liang, Haiyan Su, Guohua Zou

Department of Applied Mathematics and Statistics Faculty Scholarship and Creative Works

In practical data analysis, nonresponse phenomenon frequently occurs. In this paper, we propose an empirical likelihood based confidence interval for a common mean by combining the imputed data, assuming that data are missing completely at random. Simulation studies show that such confidence intervals perform well, even when the missing proportion is high. Our method is applied to an analysis of a real data set from an AIDS clinic trial study.

Go to article

Jewish Family Service Employee Development Plan, Brenda Bothel, Karen Gould, Dorothy L. O'Hagan Dec 2008

Jewish Family Service Employee Development Plan, Brenda Bothel, Karen Gould, Dorothy L. O'Hagan

Human Resource and Volunteer Management

Working as consultants on behalf of the USD Nonprofit Leadership program, Brenda Bothel, Dorothy O’Hagan, and Karen Gould partnered with Jewish Family Service (JFS) in San Diego, California to redesign and implement a new employee performance evaluation process. The following pages document the steps taken and research used by the USD consulting team in order to come up with a new employee evaluation process for JFS which will be referred to as the Employee Development Plan.

Go to article

Cityland – Vol. 5, No. 11, Center For New York City Law Dec 2008

Cityland – Vol. 5, No. 11, Center For New York City Law

CityLand - 2008

The December 2008 issue of CityLand covers significant land use and legal developments in New York City. Highlights include the City Council’s approval of the East Village/Lower East Side rezoning and the controversial Willets Point Redevelopment Plan, both with concessions on affordable housing and community engagement. The issue also reports on the approval of the Hunter’s Point South waterfront development and the Via Verde affordable housing project in Melrose, Bronx. Landmark coverage includes the designation of NYU’s Silver Towers and the Prospect Heights Historic District, as well as criticism of the South Street Seaport redevelopment proposal. Legal decisions include the …

Go to article

Monitor Newsletter December 15, 2008, Bowling Green State University Dec 2008

Monitor Newsletter December 15, 2008, Bowling Green State University

Monitor

Official Publication of Bowling Green State University for Faculty and Staff

Go to article

Search For The Higgs Boson Produced In Association With Z→ℓ+ℓ- In Pp̄ Collisions At S=1.96tev, T. Aaltonen, J. Adelman, T. Akimoto, M. G. Albrow, B. Álvarez González, S. Amerio, D. Amidei, A. Anastassov, A. Annovi, J. Antos, G. Apollinari, A. Apresyan, T. Arisawa, A. Artikov, W. Ashmanskas, A. Attal, A. Aurisano, F. Azfar, P. Azzurri, W. Badgett, A. Barbaro-Galtieri, V. E. Barnes, B. A. Barnett, V. Bartsch, G. Bauer, P. H. Beauchemin, F. Bedeschi, P. Bednar Dec 2008

Search For The Higgs Boson Produced In Association With Z→ℓ+ℓ- In Pp̄ Collisions At S=1.96tev, T. Aaltonen, J. Adelman, T. Akimoto, M. G. Albrow, B. Álvarez González, S. Amerio, D. Amidei, A. Anastassov, A. Annovi, J. Antos, G. Apollinari, A. Apresyan, T. Arisawa, A. Artikov, W. Ashmanskas, A. Attal, A. Aurisano, F. Azfar, P. Azzurri, W. Badgett, A. Barbaro-Galtieri, V. E. Barnes, B. A. Barnett, V. Bartsch, G. Bauer, P. H. Beauchemin, F. Bedeschi, P. Bednar

Faculty Publications

We present a search for the Higgs boson in the process qq̄→ ZH→ℓ+ℓ-bb̄. The analysis uses an integrated luminosity of 1fb-1 of pp̄ collisions produced at s=1.96TeV and accumulated by the upgraded Collider Detector at Fermilab (CDF II). We employ artificial neural networks both to correct jets mismeasured in the calorimeter and to distinguish the signal kinematic distributions from those of the background. We see no evidence for Higgs boson production, and set 95% C.L. upper limits on σZHB(H→bb̄), ranging from 1.5 to 1.2 pb for a Higgs boson mass (mH) of 110 to 150GeV/c2. © 2008 The American Physical …

Go to article

Measurement Of The Single-Top-Quark Production Cross Section At Cdf, T. Aaltonen, J. Adelman, T. Akimoto, M. G. Albrow, B. Álvarez González, S. Amerio, D. Amidei, A. Anastassov, A. Annovi, J. Antos, G. Apollinari, A. Apresyan, T. Arisawa, A. Artikov, W. Ashmanskas, A. Attal, A. Aurisano, F. Azfar, P. Azzurri, W. Badgett, A. Barbaro-Galtieri, V. E. Barnes, B. A. Barnett, V. Bartsch, G. Bauer, P. H. Beauchemin, F. Bedeschi, P. Bednar Dec 2008

Measurement Of The Single-Top-Quark Production Cross Section At Cdf, T. Aaltonen, J. Adelman, T. Akimoto, M. G. Albrow, B. Álvarez González, S. Amerio, D. Amidei, A. Anastassov, A. Annovi, J. Antos, G. Apollinari, A. Apresyan, T. Arisawa, A. Artikov, W. Ashmanskas, A. Attal, A. Aurisano, F. Azfar, P. Azzurri, W. Badgett, A. Barbaro-Galtieri, V. E. Barnes, B. A. Barnett, V. Bartsch, G. Bauer, P. H. Beauchemin, F. Bedeschi, P. Bednar

Faculty Publications

We report a measurement of the single-top-quark production cross section in 2.2fb-1 of pp̄ collision data collected by the Collider Detector at Fermilab at s=1.96TeV. Candidate events are classified as signal-like by three parallel analyses which use likelihood, matrix element, and neural network discriminants. These results are combined in order to improve the sensitivity. We observe a signal consistent with the standard model prediction, but inconsistent with the background-only model by 3.7 standard deviations with a median expected sensitivity of 4.9 standard deviations. We measure a cross section of 2.2-0.6+0.7(stat+syst)pb, extract the Cabibbo-Kobayashi-Maskawa matrix-element value |Vtb|=0.88-0.12+0.13(stat+syst)±0.07(theory), and set the limit …

Go to article

Search For Supersymmetry In Pp Collisions At S=1.96tev Using The Trilepton Signature For Chargino-Neutralino Production, T. Aaltonen, J. Adelman, T. Akimoto, M. G. Albrow, B. Álvarez González, S. Amerio, D. Amidei, A. Anastassov, A. Annovi, J. Antos, G. Apollinari, A. Apresyan, T. Arisawa, A. Artikov, W. Ashmanskas, A. Attal, A. Aurisano, F. Azfar, P. Azzurri, W. Badgett, A. Barbaro-Galtieri, V. E. Barnes, B. A. Barnett, V. Bartsch, G. Bauer, P. H. Beauchemin, F. Bedeschi, P. Bednar Dec 2008

Search For Supersymmetry In Pp Collisions At S=1.96tev Using The Trilepton Signature For Chargino-Neutralino Production, T. Aaltonen, J. Adelman, T. Akimoto, M. G. Albrow, B. Álvarez González, S. Amerio, D. Amidei, A. Anastassov, A. Annovi, J. Antos, G. Apollinari, A. Apresyan, T. Arisawa, A. Artikov, W. Ashmanskas, A. Attal, A. Aurisano, F. Azfar, P. Azzurri, W. Badgett, A. Barbaro-Galtieri, V. E. Barnes, B. A. Barnett, V. Bartsch, G. Bauer, P. H. Beauchemin, F. Bedeschi, P. Bednar

Faculty Publications

We use the three lepton and missing energy trilepton signature to search for chargino-neutralino production with 2.0fb-1 of integrated luminosity collected by the CDF II experiment at the Tevatron pp collider. We expect an excess of approximately 11 supersymmetric events for a choice of parameters of the mSUGRA model, but our observation of 7 events is consistent with the standard model expectation of 6.4 events. We constrain the mSUGRA model of supersymmetry and rule out chargino masses up to 145GeV/c2 for a specific choice of parameters. © 2008 The American Physical Society.

Go to article

An Online Learning Approach To Community Building Among Asian Journalists, Ma. Mercedes T. Rodrigo, Violet B. Valdez Dec 2008

An Online Learning Approach To Community Building Among Asian Journalists, Ma. Mercedes T. Rodrigo, Violet B. Valdez

Department of Information Systems & Computer Science Faculty Publications

This chapter describes a master's program in journalism designed for professional Asian journalists which has drawn students from 13 Asian countries and is run by faculty members from five countries. The program uses blended learning methods combining synchronous, asynchronous, and classroom-based approaches. An exploratory study was conducted to describe the strategies used by the students and teachers to build a community of learners (Garrison, Anderson, & Archer, 2000) and hence achieve the program's learning goals. The study took into consideration cultural differences, in particular, those referring to educational experiences. Results show that the respondents tended to use the strategies of …

Go to article

Daily Eastern News: December 15, 2008, Eastern Illinois University Dec 2008

Daily Eastern News: December 15, 2008, Eastern Illinois University

December

No abstract provided.

Go to article

The Tiffanian Land-Mammal Age (Middle And Late Paleocene) In The Northern Bighorn Basin, Wyoming, Ross Secord Dec 2008

The Tiffanian Land-Mammal Age (Middle And Late Paleocene) In The Northern Bighorn Basin, Wyoming, Ross Secord

Department of Earth and Atmospheric Sciences: Faculty Publications

The Tiffanian North American land-mammal age is an informal biochronologic unit that spans 4.5 myr of the middle and late Paleocene. It is preceded and succeeded by the Torrejonian and Clarkforkian land-mammal ages, respectively. The Tiffanian was initially based on a small collection of mammals from southern Colorado, but faunas of Tiffanian age are now known throughout the Rocky Mountain region. The richest and most complete sequence of middle and late Tiffanian faunas known occurs in the northern Bighorn Basin. These faunas are the primary basis for regional Tiffanian biochronology. The Bighorn Basin sequence is also important because it preserves …

Go to article

The Bg News December 15, 2008, Bowling Green State University Dec 2008

The Bg News December 15, 2008, Bowling Green State University

BG News (Student Newspaper)

The BGSU campus student newspaper. December 15, 2008. Volume 99-Issue 73.

Go to article

Sediment Transport Rate-Based Model For Rainfall-Induced Soil Erosion, Zhi Qiang Deng, João L.M.P. De Lima, Hoon Shin Jung Dec 2008

Sediment Transport Rate-Based Model For Rainfall-Induced Soil Erosion, Zhi Qiang Deng, João L.M.P. De Lima, Hoon Shin Jung

Faculty Publications

A one-dimensional mathematical model, termed sediment transport rate-based model, is developed for determining rainfall-induced soil erosion and sediment transport. The model is comprised of (1) the kinematic-wave equation for overland flow, (2) a transport rate-based advection equation for rainfall-induced soil erosion and sediment transport, and (3) a semi-Lagrangian algorithm for numerical solution of the soil erosion and sediment transport equation. A series of soil flume experiments under simulated rainfalls were conducted to simulate the overland flow and sediment transport and to test the sediment transport rate-based model. Numerical results of sediment transport rate-based model indicate that (i) hydrographs display an …

Go to article

Identification Of G1-Regulated Genes In Normally Cycling Human Cells, Maroun J. Beyrouthy, Karen E. Alexander, Amy Baldwin, Michael L. Whitfield, Hank W. Bass, Dan Mcgee, Myra M. Hurt Dec 2008

Identification Of G1-Regulated Genes In Normally Cycling Human Cells, Maroun J. Beyrouthy, Karen E. Alexander, Amy Baldwin, Michael L. Whitfield, Hank W. Bass, Dan Mcgee, Myra M. Hurt

Dartmouth Scholarship

Background: Obtaining synchronous cell populations is essential for cell-cycle studies. Methods such as serum withdrawal or use of drugs which block cells at specific points in the cell cycle alter cellular events upon re-entry into the cell cycle. Regulatory events occurring in early G1 phase of a new cell cycle could have been overlooked. Methodology and Findings: We used a robotic mitotic shake-off apparatus to select cells in late mitosis for genome-wide gene expression studies. Two separate microarray experiments were conducted, one which involved isolation of RNA hourly for several hours from synchronous cell populations, and one experiment which examined …

Go to article

The Acs Survey Of Galactic Globular Clusters. Vi. Ngc 6366: A Heavily Stripped Galactic Globular Cluster, Nathaniel E. Q. Paust, Antonio Aparicio, Giampaolo Piotto, I. Neill Reid, Jay Anderson, Ata Sarajedini, Luigi R. Bedin, Brian Chaboyer Dec 2008

The Acs Survey Of Galactic Globular Clusters. Vi. Ngc 6366: A Heavily Stripped Galactic Globular Cluster, Nathaniel E. Q. Paust, Antonio Aparicio, Giampaolo Piotto, I. Neill Reid, Jay Anderson, Ata Sarajedini, Luigi R. Bedin, Brian Chaboyer

Dartmouth Scholarship

We have used observations obtained as part of the Hubble Space Telescope/ACS Survey of Galactic globular clusters (GCs) to construct a color-magnitude diagram for the bulge cluster, NGC 6366. The luminosity function derived from those data extends to M F606W ~ 9, or masses of ~0.3 M ☉. Unlike most GCs, the mass function peaks near the main-sequence turnoff with significantly fewer low-mass stars even after correction for completeness and mass segregation. Using a multimass King model, we extrapolate the global cluster behavior and find the global mass function to be poorly matched by a power law, with …

Go to article

Comparison Of Two Training Programs On Acceleration Out Of The Break In American Football, Micah Adam Alba Dec 2008

Comparison Of Two Training Programs On Acceleration Out Of The Break In American Football, Micah Adam Alba

Theses and Dissertations

Athletes of American football need the ability to stop, start, and reach top speed in an efficient manner. Football players on the defensive side of the ball require the skill of stopping a backward run and accelerating to a forward run. This action is termed the break. Football players receive year-round training in an effort to improve performance. Yet, many times, these athletes may not focus specifically on the muscular systems that are unique to the position they play. The law of specificity states that the more specific the training is for the action required, the more beneficial the outcome. …

Go to article

The Development Of Hyaluronic Acid Biomaterials For Vascular Tissue Engineering, Samir Ibrahim Dec 2008

The Development Of Hyaluronic Acid Biomaterials For Vascular Tissue Engineering, Samir Ibrahim

All Dissertations

Current vascular implant materials poorly interact with medial smooth muscle cells (SMCs) allowing the permanent loss of vascular elastin, eliminated by trauma or disease, a crucial element in maintaining the natural biomechanics of the blood vessel and overall vascular homeostasis. In addition, these materials insufficiently recruit vascular endothelial cells (ECs) to form a normally functional, confluent endothelium that acts as the interface between the blood and vascular tissue and regulates numerous vital vascular processes. As a result, the restenosis, or re-occlusion, rate within these devices has remained fairly high stimulating the investigation of numerous new materials capable of providing the …

Go to article

2008-12-15 Unm News Minute, University Of New Mexico Communication And Marketing Department Dec 2008

2008-12-15 Unm News Minute, University Of New Mexico Communication And Marketing Department

UNM News Minute 2008

No abstract provided.

Go to article

Interpersonal Dimensions Of Goal Pursuit: Goal Support, Shared Goals, Communal Strength, And Generativity In Relationship To Self-Determination Theory, Christine O. Mollica Dec 2008

Interpersonal Dimensions Of Goal Pursuit: Goal Support, Shared Goals, Communal Strength, And Generativity In Relationship To Self-Determination Theory, Christine O. Mollica

Open Access Dissertations

Self-Determination Theory (SDT) research on goal pursuit indicates that people with intrinsic goal pursuits experience greater well-being than those with extrinsic goal pursuits. Three nutriments have been suggested by SDT that facilitate intrinsic motivation: autonomy, competence and relatedness. These nutriments, considered social conditions by SDT, have been understudied. However, recent SDT research and the small literature on goal support in relationships suggest that social aspects of goal pursuit are quite relevant and warrant further investigation. This study examined interpersonal dimensions of goal pursuit including Goal Support, Shared Goals, Communal Strength and Generativity. This interpersonal cluster was examined in the context …

Go to article

A Groundwork For The Theory Of Notation, Len O. Olsen Dec 2008

A Groundwork For The Theory Of Notation, Len O. Olsen

Open Access Dissertations

This work is a philosophical investigation of signs. It offers a definition of the term ?sign? and develops three different systems for talking precisely about signs and their properties. The system of object display lines is developed in the first chapter; the ostension notation and the box notation are developed in the second chapter; and the contemporary associationist definition of a sign is developed in the third chapter. These systems, in conjunction with the definition, are proffered as a philosophical foundation for the theory of notation. The first chapter of this work develops the distinction between i) mere objects (non-signs), …

Go to article

The Earthquake Cycle Of Strike-Slip Faults, Gina M. Schmalzle Dec 2008

The Earthquake Cycle Of Strike-Slip Faults, Gina M. Schmalzle

Open Access Dissertations

An earthquake is a mechanism of stress release along plate boundaries due to relative motion between the Earth's lithospheric blocks. The period in which stresses are accruing across the plate boundary is known as the interseismic portion of the earthquake cycle. This dissertation focuses on interseismic portion of the earthquake cycle to extract characteristics of fault, shear zone and rock properties. Global Positioning System (GPS) data are used to observe the pattern of deformation across two primarily strike-slip fault systems: the Carrizo Segment of the San Andreas Fault (SAF) and the Eastern California Shear Zone (ECSZ). Two sets of GPS …

Go to article

Processes, Patterns And Petrophysical Heterogeneity Of Grainstone Shoals At Ocean Cay, Western Great Bahama Bank, Francisco Eduardo Gomes Da Cruz Dec 2008

Processes, Patterns And Petrophysical Heterogeneity Of Grainstone Shoals At Ocean Cay, Western Great Bahama Bank, Francisco Eduardo Gomes Da Cruz

Open Access Dissertations

Holocene and Pleistocene grainstone deposits surrounding Ocean Cay located on the western margin of Great Bahama Bank provide key evidence for the comprehension of patterns, processes and petrophysical heterogeneity of carbonate grainstone shoals. New datasets consisting of high-resolution remote sensing data, acoustic Doppler current measurements, sub-bottom profiles, and sedimentological and petrophysical analyses offer an opportunity to elucidate the various factors in the deposition of a grainstone shoal complex and assess of how much of the sedimentary fabric and early diagenetic overprint influences the petrophysical characteristics of similar ancient deposits. The Holocene shoal complex investigated here includes the Cat Cay ooid …

Go to article

Effects Of Vibration On Spinal Circuitry Related To Spasticity And Walking, Lanitia L. Ness Dec 2008

Effects Of Vibration On Spinal Circuitry Related To Spasticity And Walking, Lanitia L. Ness

Open Access Dissertations

In individuals with spinal cord injury (SCI) who have disrupted communication between the brain and spinal cord, vibration may mimic functions formerly served by the lost or impaired supraspinal inputs resulting in more normal reflex modulation and improved walking function. Three experiments assessed the effects of vibration on spinal locomotor-generating circuitry, spinal reflex activity, and walking function. In Experiment 1, localized leg vibration was used to elicit air-stepping responses in the lower extremities. We compared responses of individuals with SCI to those of non-disabled (ND) individuals and assessed the influence of severity injury and locomotor training on the air-stepping response …

Go to article

First Prev Next Last