Digital Commons Network^™

Effects Of Sleep Deprivation On Autonomic Nervous System, Jaeyeaon Cho

Theses

Sleep deprivation (SD) has been thought a potential factor to trigger cardiovascular events by increasing the sympathetic nervous system activity. The aim of the present study was to evaluate the relationship between sleep deprivation and the autonomic nervous system activity by means of heart rate variability (HRV) and blood pressure variability (BPV). All data were acquired in the sleep lab of Columbia University.

Data were acquired from the two groups, SD and control. Subjects in the SD group did not sleep for thirty-six hours but subjects in the control group slept at night as usual. There were five different data …

Fabrication Of Nanofiber Scaffolds By Electrospinning And It's Potential For Tissue Engineering, Shobana Shanmugasundaram

Theses

Electrospinning is a fabrication process that uses an electric field to control the deposition of polymer fibers on to a target substrate. This electrospinning strategy can be used to fabricate fibrous polymer mats composed of fiber diameters ranging from several microns down to tens of nanometers. This study assesses the potential of electrospinning, as an alternative scaffold fabrication technique for tissue engineering applications. In this study, electrospinning is adapted to produce tissue-engineering scaffolds of two different size ranges composed of non-woven poly-L-lactide (PLLA) nanofibers and as a first study, the potential use of these scaffolds as tissue engineering scaffolds was …

Particles In The Great Pinatubo Volcanic Cloud Of June 1991:The Role Of Ice, Song Guo, William I. Rose, Gregg J. S. Bluth, M. I. Watson

Department of Geological and Mining Engineering and Sciences Publications

Pinatubo's 15 June 1991 eruption was Earth's largest of the last 25 years, and it formed a substantial volcanic cloud. We present results of analysis of satellite-based infrared remote sensing using Advanced Very High Resolution Radiometer (AVHRR) and TIROS Operational Vertical Sounder/High Resolution Infrared Radiation Sounder/2 (TOVS/HIRS/2) sensors, during the first few days of atmospheric residence of the Pinatubo volcanic cloud, as it drifted from the Philippines toward Africa. An SO₂-rich upper (25 km) portion drifted westward slightly faster than an ash-rich lower (22 km) part, though uncertainty exists due to difficulty in precisely locating the ash cloud. …

Design Concepts And Process Analysis For Transmuter Fuel Manufacturing, Georg F. Mauer

Fuels Campaign (TRP)

This proposal addresses the subject heading ‘Transmutation Fuel Development’ in the 2004 research topic list of the UNLV Transmutation Research Program (TRP) and DOE Advanced Fuel Cycle Initiative (AFCI). The large-scale deployment of remote fabrication and refabrication processes (with a capacity of approx. 100 metric tons of Minor Actinides (MA) annually) will be required for all transmutation scenarios. The objective of this project is the design, analysis, and evaluation of manufacturing processes for transmuter fuel fabrication. Fabrication processes for different fuel types differ in terms of equipment types, throughput, and cost. The evaluation of the fabrication processes will create a …

Zone Heating For Wean-To-Finish Facilities: A Performance Comparison, Rick R. Stowell

Department of Agricultural and Biological Systems Engineering: Faculty Publications

Farm research trials were conducted in 2003 and 2004 to assess the effects of the type of zone heater and floor mat used in a wean-to-finish building on the thermal environment created for newly weaned pigs and resulting pig performance. Modulated LP gas-fired brooder heaters were compared to electric heat lamps, and floor mats made from farm-cut wood sheathing (3/8” oriented-strand board, OSB) were compared to commercial [unheated] rubber mats in a replicated 2x2 factorial experiment. No consistent differences in air temperature near the heating zone were found between either of the treatments, with treatment means within 1^oF …

The Influence Of Environmental Temperature And Substrate Initial Moisture Content On Aspergillus Niger Growth And Phytase Production In Solid−State Cultivation, Seaborn B. Carter, Sue E. Nokes, Czarena L. Crofcheck

Biosystems and Agricultural Engineering Faculty Publications

Aspergillus niger is being used commercially for phytase production utilizing solid-state cultivation; however, no studies have been published that investigated the optimal environmental temperature and initial substrate water content to maximize fungal growth and/or phytase production. Solid-state cultivations of Aspergillus niger on wheat bran and soybean meal were conducted at three temperatures (25°C, 30°C, and 35°C) and three initial moisture contents (50%, 55%, and 60% wet basis) in a split-plot full-factorial experimental design. Fermentations were conducted for 0, 24, 48, 72, and 120 h. The containers were sampled destructively and assayed for phytase activity and glucosamine concentration as an estimate …

Immobilized Pseudornonas Cepacia Lipase For Biodiesel Fuel Production From Soybean Oil,, Hossein Noureddini, X Gao, R S. Philkana

Papers in Biomaterials

No abstract provided.

Processing And Optimization Of Natural Fiber Reinforced Composites Using Date Palm Fibers, Khalifa Musabbeh Suwaidan Hamad Al-Kaabi

Theses

During the last twenty years, ecological concerns have resulted in a renewed interest in natural materials. Composite materials usually depend on using man-made fibers as the reinforcing element. The possibility of using natural fibers instead of synthetic fibers is gaining acceptance among users. This work aims to investigate the possibility of extracting natural fibers from date palm trees to be used as reinforcement with polymeric materials. The objective was achieved by characterizing fibers through different chemical, physical and mechanical tests and using different treatment methods in order to modify the fiber properties. Date Palm Fibers (DPF) exhibit a cylindrical shape …

Interim Sediment Management Plan For First Dam, Logan River, Thirumurugan Bose

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

Sediment is a serious problem in the management of dams all over the world. In this project an interim sediment management plan for First Dam, on the Logan River in northern Utah, is discussed. The objective of the plan is to control the sediment budget of the reservoir in such a way that other reservoir maintenance activities (e.g., unusual draw downs for structural repairs) will produce minimal downstream environmental impacts on water quality and aquatic resources.

This report presents a detailed literature review of the various sediment management practices used for reservoir sediment control. It also discusses the downstream effects …

Numerical Modeling Of Friction Stir Welding: A Comparison Of Alegra And Forge3, Alma H. Oliphant

Theses and Dissertations

The objective of this research was to evaluate the capabilities of ALEGRA, a Sandia National Labs hydrocode, and Forge3, a Transvalor S.A. product, to accurately model the Friction Stir Welding Process. ALEGRA and Forge3 are discussed in light of the inherent challenges of modeling Friction Stir Welding, and a rotational boundary condition is added to ALEGRA. Results are presented from Friction Stir Welding modeling outputs from both ALEGRA and Forge3. ALEGRA is shown to be incapable of modeling the Friction Stir Welding process, in large part due to its focus on shock propagation, which causes extremely small time steps. Forge3 …

Noble Metal Nanostructures Synthesized Inside Mesoporous Nanotemplate Pores, J. Arbiol, E. Rossinyol, A. Cabot, F. Peiro, A. Cornet, J. R. Morante, Fanglin Chen, Meilin Liu

Faculty Publications

Noble metal impregnation has resulted in the inclusion of metal nanostructures within the SBA-15 mesoporous silica hexagonal pores (from nanoclusters to nanowires). A bright-field transmission electron microscopy three-dimensional reconstruction is proposed to analyze the localization of nanostructures within the pores of mesoporous nanotemplates. The method allows corroboration whether the nanostructures are synthesized inside the pores or they are synthesized alternatively on the nanotemplate aggregates exterior surface.

Molecular-Dynamics Simulation Of The Effect Of Ions On A Liquid–Liquid Interface For A Partially Miscible Mixture, Richard L. Rowley, Kent E. Wardle, Eric Carlson, Douglas Henderson

Faculty Publications

Molecular-dynamics simulations were performed to model the effect of added salt ions on the liquid-liquid interface in a partially miscible system. Simulations of the interface between saturated phases of a model 1-hexanol + water system show a bilayer structure of 1-hexanol molecules at the interface with OH heads of the first layer directed into the water phase and the opposite orientation for the second layer. The alignment of the polar OH groups at the interface stabilizes a charge separation of sodium and chloride ions when salt is introduced into the aqueous phase, producing an electrical double layer. Chloride ions aggregate …

Hazards Identification Model For Rail Rapid Transit Accidents, Lung-Chuang Wang

Journal of Marine Science and Technology–Taiwan

In comparison with the other transportation modes, rail rapid transit already enjoys a higher degree of safety as it is designed with the exclusive right of way and the automatic train control and monitoring systems. Nevertheless, rail rapid transit systems are not free from serious accidents, which often led to human injuries and facility damages. The planning of accident prevention and emergency measures, therefore, are still important issues of the rail rapid transit operations. The model presented in this study analyses the process of hazard identification in two stages, which clearly indicate the factors of the inherent and direct hazard …

2004 - The Ninth Annual Symposium Of Student Scholars

Symposium of Student Scholars Program Books

The full program book from the Ninth Annual Symposium of Student Scholars, held on April 16, 2004. Includes abstracts from the presentations and posters.

O-Cell Testing Of Reinforced Concrete Driven Piles, Sanjeev Kumar, Cesar Alarcon, Alyass Hosin

International Conference on Case Histories in Geotechnical Engineering

Precast and prestressed concrete piles, approximately 12 to 18 inch diameter or width are frequently used to support heavy building and bridge structures. Fly ash has long been recognized as a construction material used frequently in several Portland cement and concrete products, structural fills, embankments, and road bases/subbases. However, use of Illinois PCC bottom ash in construction of precast concrete piles so far has been very limited, if any, mainly due to the lack of technical data to convince the engineering community that bottom ash could be used in precast and prestressed concrete piles without jeopardizing their performance and the …

A Dangerous Place To Dig Excavation At The Toe Of Saluda Dam, Elena Sossenkina, Scott Newhouse, Matt Glunt

International Conference on Case Histories in Geotechnical Engineering

Remedial work on the Saluda Dam will entail excavation at the toe to depths of over 50 ft. Excavation at the toe of a large high hazard dam is an unusual event. Although statically stable the Dam doesn’t meet modern standards for dynamic stability. Based on the assessment of liquefaction potential, the dam requires remediation. The downstream hazard entails consequences of failure of potential loss of life. Due to such consequence, the Regulator called for renovation of Saluda Dam. Engineers evaluated several remedial alternatives. The chosen alternative entails excavation at the toe for construction of new RCC and Rockfill Berms. …

Groundwater Abstraction From Aquitard, Aquiclude And Thin Aquifer In Barind, M. Asad Uz Zaman

International Conference on Case Histories in Geotechnical Engineering

Barind is the land where the quality of life is inextricably linked to the availability of water. We are trying to help the section of people of such area where water is considered only from the viewpoint of quantity; they do not have the scope to think from quality aspect for their survival. The scale of poverty level here is normally measured on the basis of per capita income; however, to give a better indication about the quality of life, the accessibility for food, education, health, safe drinking water, sanitation, medicine and social empowerment for decision-making should also be included …

Fifth International Conference On Case Histories In Geotechnical Engineering, Multiple Authors

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

Table Of Contents - Papers, Multiple Authors

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

Seismogenic Landslides In Himalaya With Special Reference To Uttaranchal, Kishor Kumar, Dinesh Sati

International Conference on Case Histories in Geotechnical Engineering

The continued compression between Indian and Asian continental plates which ultimately led to the collision of the two, is regarded as the most likely phenomenon responsible for the emergence of Himalaya. The stress build up across the strike of the orogen produced regional north-south compressional structures including two major tectonic boundaries/ discontinuities namely the Main Central Thrust (MCT) and the Main Boundary Thrust (MBT). In the mountain building process the seismic outbursts (earthquakes) and tectonic adjustments are indicators of strain release. In the last century, this region has experienced four major earthquakes measuring above 8 in the Richter Scale besides …

Slope Failure And Piping Potential Due To Root Decomposition In An Aged Embankment Dam, Ali M. Oskoorouchi, Philip J. Lane

International Conference on Case Histories in Geotechnical Engineering

Lake Storey Embankment Dam originally built in 1929 to provide water for steam locomotives. This 133-acre public lake is located near Galesburg in Knox County, Illinois. The dam is a zoned embankment (with clay cores on each side of a concrete core wall, 12 inches thick), 51 ft high above the streambed, approximately 850 ft long, with a concrete free ogee spillway. Numerous minor to moderate damaged spots including a moderate size downstream slope failure have been detected during the dam inspection of Year 2000. This paper discusses the results of the investigation to identify the problems and the proposed …

Two Case Histories Of Blast- & Traffic-Induced Vibrations On The Stability Of Burrows Of Endangered Sensitive Ground Dwelling Animals, John A. Barneich, Jay Arabshshi, Steven K. Duke

International Conference on Case Histories in Geotechnical Engineering

Two case histories are presented where jurisdictional authorities expressed a concern regarding the impact of blast and construction traffic induced vibrations on the stability of the burrows of endangered ground dwelling species. The first case history involved the use of explosives proposed to be used for a seismic survey in the vicinity of desert tortoise burrows. The concern was that the use of explosives in the vicinity of a tortoise burrow could cause the collapse of an occupied burrow potentially trapping the tortoise within the burrow. Field tests were performed by constructing artificial tortoise burrows and inducing progressively higher vibration …

The Geotechnical Hazard Induced By 8.1 Earthquake In West Pass Of Kunlun Mountatin In China In 2001, Lanmin Wang, Zhongxia Yuan, Xu Liu, Yongming Chen, Weifeng Wang

International Conference on Case Histories in Geotechnical Engineering

On November 14, 2001, a great earthquake with a magnitude of Ms=8.1 occurred in the Qinhai-Tibet Plateau, China, which is called as the west pass of Kunlun mountain Ms8.1 earthquake. This earthquake is the largest and the first one with a magnitude greater than 8.0 in mainland China in the recent 50 years. It caused a large-scale deformation zone with a length of 426 km in frozen soil deposit in the plateau with a height of 4000-5500 meters above sea level. Some geotechnical hazards induced in the meizoseismal area, such as compression and tension failure of soil deposit, shaking landslides …

“Value Engineering…?” – Changes During Construction, Maral Papazian Bedian

International Conference on Case Histories in Geotechnical Engineering

“Value Engineering” is a frequently found clause in Construction contracts in the USA, allowing contractor-initiated design changes. Misleading is the interpretation of “value engineering” to imply cost savings shared with the owner, and its implementation during construction, is problematic. It is not surprising that such a clause would simply be ignored because it involves changes in design, often major changes in very short time; and change is feared and vehemently resisted by all parties, owner, designer, and contractor. The problem may lie in the divergence and separation of the designer/engineer and builder/contractor; their priorities and incentives are very different. The …

Past Proceedings: Fifth International Conference On Case Histories In Geotechnical Engineering, New York (2004), Multiple Authors

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

No abstract provided.

Re-Evaluation Of So2 Release Of The 15 June 1991 Pinatubo Eruption Using Ultraviolet And Infrared Satellite Sensors, Song Guo, Gregg J. S. Bluth, William I. Rose, M. I. Watson, A. J. Prata

Department of Geological and Mining Engineering and Sciences Publications

In this study, ultraviolet TOMS (Total Ozone Mapping Spectrometer) satellite data for SO₂ are re-evaluated for the first 15 days following the 15 June 1991 Pinatubo eruption to reflect new data retrieval and reduction methods. Infrared satellite SO₂ data from the TOVS/HIRS/2 (TIROS (Television Infrared Observation Satellite) Optical Vertical Sounder/High Resolution Infrared Radiation Sounder/2) sensor, whose data sets have a higher temporal resolution, are also analyzed for the first time for Pinatubo. Extrapolation of SO₂ masses calculated from TOMS and TOVS satellite measurements 19–118 hours after the eruption suggest initial SO₂ releases of 15 ± 3 …

The Airline Quality Rating 2004, Brent D. Bowen, Dean Headley, Uno Aviation Institute

Faculty Books and Monographs

UNOAI Report 04-1

The Airline Quality Rating (AQR) was developed and first announced in early 1991 as an objective method of comparing airline quality on combined multiple performance criteria. This current report, the Airline Quality Rating 2004, reflects monthly Airline Quality Rating scores for 2003. AQR scores far the calendar year 2003 are based on 15 elements in four major areas that focus on airline performance aspects important to air travel consumers.

The Airline Quality Rating 2004 is a summary of month-by-month quality ratings for U.S. airlines that have at least 1% of domestic passenger volume during 2003. Using the …

Group-Theoretic Approach As A General Framework For Sensors, Neural Networks, Fuzzy Control, And Genetic Boolean Networks, Hung T. Nguyen, Vladik Kreinovich, Chitta Baral, Valery D. Mazin

Departmental Technical Reports (CS)

When describing a system of interacting genes, a useful approximation is provided by a Boolean network model, in which each gene is either switched on or off - i.e., its state is described by a Boolean variable.

Recent papers by I. Shmulevich et al. show that although in principle, arbitrarily complex Boolean functions are possible, in reality, the corresponding Boolean networks can be well described by Boolean functions from one of the so-called Post classes - classes that are closed under composition. These classes were originally described by E. Post.

It is known that the Boolean model is only an …

Nebraska Blueprint - Spring 2004

Nebraska Blueprint (Student Publication)

Table of Contents:

From the Editor
A Well-Earned Yet Charmed Life by Tom Cudd
Combating Tomorrow’s Diseases Today by Kevin Mlnarik
Where We're Headed by Cecelia Orwig
Not Today But Here Tomorrow by Tom Cudd
My So Called Life: 2054 by Cecelia Orwig
What It's All About by Tom Cudd
Why Don't Engineers get involved? by Tom Cudd
ASME Hosts Successful Conference

The Relationship Of Project Team Attributes To Project Interim Performance, Vickie S. Parsons

Engineering Management & Systems Engineering Theses & Dissertations

The factors associated with project success, or failure, have not been conclusively resolved in the project management literature. The purpose of this research was to investigate the relationship of project team attributes and interim project performance using a statistical research design. An abundance of research has focused solely on the importance of technical project components as they relate to cost, schedule, or technical performance. However, research into internal team attributes has been sporadic and, generally, associated with subjective measures of project performance or less than optimal statistical techniques. Prior assessment of project performance has also been concentrated at project completion. …