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Case History Of Aquifer Thermal Energy Storage (Ates), C. Mirza

International Conference on Case Histories in Geotechnical Engineering

Aquifer Thermal Energy storage (ATES) is a relatively new energy conserving technology which enables subsurface seasonal storage of freely available cold of winters and heat of summers for re-use in the opposite season. Thermal energy is stored in aquifers, groundwater serving as the medium of energy transfer. This case history describes an ATES installation for an office building in Ontario. Groundwater from a 10 m thick sandy aquifer at the 60 m depth is pumped from one pair of wells and re-injected, after extraction or addition of heat, into an opposing pair of wells. ATES technology not only conserves non-renewable …

General Report On Session No. 5: Case Histories Of Retaining Structures And Deep Excavations, John T. Christian, Çetin Soydemir, Alan J. Lutenegger

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

Lining Of Perennial Canals Under Flowing Conditions By Ulomat Grouted Mattress Technique, D. L. Shah, A. V. Shroff, Piyush V. Parikh

International Conference on Case Histories in Geotechnical Engineering

Irrigation water is made available to the farmers by means of construction of a dam/weir and a canal system taking off from the reservoir impounded behind the dam. This water is therefore very precious. If the canal system is not lined, about 25 to 30 per cent of water released in the canal is lost by way of seepage through canals. Canals should therefore be lined not only to save this water but also to irrigate additional area. A pilot project of providing such lining on experimental basis was taken up for the first time in India by Irrigation Department …

Experimental Investigation Of The Effects Of Blowing Ratio Parameter On Heat Transfer To A Film-Cooled Flat Plate, Marco R. Valencia

Theses and Dissertations

The effects of blowing ratio on film cooling effectiveness were investigated. Two round-nosed test plates were used. One made of aluminum and the second of corian (low thermal conductivity). Injection at 35 degrees in the downstream direction was studied. Helium was mixed with air to produce a density ratio (coolant to mainstream) of 1.6 and 2.0, while the blowing ratio varied from 0.3 to 2.2. Surface temperature was measured by thin film gages located up to a nondimensional downstream distance X/D of 30. Two injection regimes, weak and strong, were found. In the weak regime, film cooling reduced gage heat …

Radome Depolarization Effects On Monopulse Receiver Tracking Performance, Michael A. Temple

Theses and Dissertations

Boresight Error (BSE), defined as the angular deviation between the true position and the apparent position of a target as indicated by a radar, is an important figure of merit for a tracking radar. A significant contributor to system BSE is the protective radome. This research effort employed a GO technique to investigate the effects of a radome on BSE, expanding previous ray- trace receive techniques to include: (1) a uniquely defined/developed mathematical description for each surface within arbitrary multi-layer tapered radomes, (2) an 'ideal' taper function concept for obtaining optimum BSE prediction performance, (3) a generalized technique for calculating …

Nonlinear Dynamic Finite Element Simulation Of Hydroelastic Mounts For Light Weight Vehicles, Talla Jayapal Reddy

Masters Theses

Modern light weight vehicles generate large noise levels, that may need bulky classical rubber mounts to suppress. Hydroelastic mounts can significantly reduce the vibration level of current production automobiles without weight penalty. However, the highly nonlinear behavior of hydroelastic mounts has not been established yet and its use is, therefore, limited to trial and error design methods.

This study discusses the implementation of nonlinear finite element simulation of hydroelastic mounts using the ANSYS finite element code. Fluid elements are limited to linear analysis and therefore are incompatible with the nonlinear hyperelastic elements. A method is proposed to simulate the fluid …

Seepage Through Mine Tailings Dams, D. C. Cowherd, K. C. Miller, V. G. Perlea

International Conference on Case Histories in Geotechnical Engineering

A determination of the phreatic surface in dams constructed of coal refuse, under the criteria set forth in the National Dam Safety Act was made. All of these dams were over 20 years old. Most of the embankments studied were not constructed with any compaction specification and no effort was made to compact the coal refuse. A comparison of actual phreatic surface to the theoretically predicted surface is made using the classical seepage theory and the computer program SEEP. The embankments are old enough to present the steady slope phreatic surface, and thus, provide a good check of the ability …

Geomechanical Studies For A Himalayan Tunnel In Jointed Dolomites: A Case History, G. S. Saini, A. K. Dube

International Conference on Case Histories in Geotechnical Engineering

Reported case history of Himalayan tunnel reveals that Barton's and Bieniawski's classification systems provide better assessment of the rock mass behavior. The design and shear strength parameters derived from these classifications provided a preliminary design of the tunnel, which has been critically evaluated with the design, adopted at site. Based on the structural feature and ground water conditions, a number of tunnelling conditions have been predicted. The studies indicated the loosening rock pressures would be occuring at site with an estimated range of 0. 25 kg/cm² to 3. 58 kg/cm². Problems of roof collapse, flowing ground condition …

Innovative Foundations In Poor Ground, B. G. Rao, M. P. Jain

International Conference on Case Histories in Geotechnical Engineering

In the present paper, attention is chiefly focused on ground treatment approach which merits designers’ preference in most situations, not because of greater latitude in terms of choice but also because of better assurance of performance. Some innovative foundation techniques have been introduced. The performance of these techniques have been evaluated through full scale field installation and insitu testing in deep deposits of soft saturated marine clays. The field study has indicated that the new foundation technologies carry the best assurance of safety, speed and economy and may provide an efficient alternatives to existing foundations in difficult soil conditions.

Site Geology And Tunneling Methods, S. K. Jain

International Conference on Case Histories in Geotechnical Engineering

Site geology, subsurface and ground water conditions play a vital role in the design of underground structures and the selection of appropriate construction methods and equipments. This paper describes a tunnel project where site subsoils and geo-hydrology dictated the use of various tunneling methods employed at the site. The project is an interceptor sewer tunnel in Staten Island, New York, as a part of the Oakwood Beach Water Pollution Control Project, and consists of two pumping stations and approximately 6.5 miles of sewer along Hylan Boulevard, as shown on Figure 1. The diameter of the tunnel varies from 66 to …

Kinetic Study Of Decomposition Of Azo Dyes And Phenol In Advanced Oxidation Processes Reaction Mechanisms, Pathways And Intermediates, Hung-Yee Shu

Dissertations

Advanced Oxidation Processes (AOP) are an emerging technology for treatment of various hazardous organics in wastewater and groundwater. However, the kinetics and mechanisms for AOP have not been well understood. A mechanism including light intensity was studied for the decomposition of azo dyes and phenol in an AOP reactor with a 5,000 watt low pressure mercury lamp. UV light absorption is an important parameter. The effect of pH, hydrogen peroxide dosage, and dye concentration on the decomposition of azo dyes in an H₂O₂/UV reactor were also studied. Reaction pathways and intermediates of phenol oxidation by different …

Competition Between Two Microbial Populations In A Sequencing Fed-Batch Reactor And Its Implications For Waste Treatment Applications, Sitaram Dikshitulu

Dissertations

Pure and simple competition between two microbial populations in a sequencing fed-batch reactor (SFBR) was studied both at the theoretical and experimental level. Competition occurred for a single chemical pollutant which could serve as the sole carbon and energy source for both competitors. A mathematical model describing the process under inhibitory kinetics (as is usually the case with hazardous and toxic substances) was derived and theoretically analyzed. The model predicts that the dynamics of a SFBR, and the kinetics of biodegradation, result in a complex set of operating regimes in which neither species, only one species, or both species survive …

Mechanism Of Pneumatic Fracturing, Trevor Compton King

Theses

This thesis investigates the mechanism of pneumatic fracturing in geologic materials such as soil and rock. Pneumatic fracturing is a recently developed technique for increasing the permeability of geologic formations by the controlled injection of high pressure air. Present applications are focusing on the in situ remediation of contaminated soil and ground water, although pneumatic fracturing has other geotechnical uses such as pumping well enhancement.

A comprehensive literature review of a related technology known as hydraulic fracturing is presented, which serves as background for development of a pneumatic fracturing model. Pressure-time histories from actual pneumatic injections are analyzed in detail …

Geometric Dimensioning And Tolerancing A Tool For Concurrent Engineering, Tapan Kumar S. K. Jain

Theses

The concept of Concurrent Engineering recognizes an immediate need for a new design environment and technology and so requires extensive interdisciplinary cooperation and integration of diverse functions of a manufacturing organization such as marketing, design, manufacturing and finance. One of the key factors to achieve successful integration among the departments is better communication and it becomes imperative in cases of varying levels of communication needs, especially in interdepartmental cases.

Concurrent Engineering is a philosophy which provides certain benefits. There are various tools and methods available for implementation of Concurrent Engineering concepts. One of the tools is Geometric Dimensioning & Tolerancing …

Design Of A 320x122 Mwir-Ccd Ptsi-Si Imaging Radiometer With Automatic Optical Integration Time Control, Nathaniel Joseph Mccaffrey

Theses

An infrared CCD camera system was designed and developed to operate a 320X244 Schottky-barrier IR-CCD Focal Plane Array (FPA) as an imaging radiometer. The goal of this research was to develop a reliable radiometer capable of resolving temperatures between 50 and 1000°C to within 1°C accuracy using non-contact spectral thermographic methods. To accomodate this wide dynamic range, the imager was operated in a non-interlaced format with variable optical integration times ranging from 120µsec to 122msec. Variable integration control was achieved by employing a "dump and read" timing procedure. To facilitate this operation, novel circuitry was developed for dynamically controlling the …

Cone Penetration In Cemented Deposits-A Field Study, Semih Arslan

LSU Historical Dissertations and Theses

Neglecting cementation results in an underestimation of slope stability and pile capacity in design and analysis of geotechnical engineering problems related to cemented deposits. Developing methods to identify and assess the engineering characteristics of cemented deposits is an important subject in geotechnical engineering.

This study is conducted to evaluate the reliability of the prediction schemes proposed by previous investigators through a field study of cone penetration in a cemented deposit and respective laboratory triaxial study on undisturbed cemented specimens. The effect of cementation on cone penetration resistance is investigated through the field study, and the effects of cementation on drained …

Effects Of Crosstalk On Fidelity In Page-Oriented Volume Holographic Optical Data Storage, Gregory P. Nordin, P. Asthana

Faculty Publications

Using numerical simulation, we quantitatively examine the effects of cross talk on the recall fidelity of stored binary data in a page-oriented volume holographic memory system. We discuss the trade-off between the signal-to-noise ratio of the reconstructed bits and the optical throughput of the system (i.e., the fraction of the incident beam that is diffracted to the detector plane). We show that significant gains in the signal-to-noise ratio can be achieved with modest decreases in optical throughput in the region where the highest throughput occurs. The magnitude of this trade-off is influenced by both beam degeneracy and coherent recording cross …

Acuta Enews May 1993, Vol. 22, No. 5

ACUTA Newsletters

In This Issue

Call for Nominations page 2

President's Message page 3

MHEC $aves with Virtual Private Network page 4

Board of Directors Meeting page 5

Tireed Dues page 5

Toll Fraud Takes Aim page 6

Infrastructure page 7

Toll Fraud Checklist page 8

Will My Cellular Phone Fry My Brain? page 9

Executive Director's Message page 11

Bulletin No 4242 - The Lyre Trellis For Viticulture, Alain Carbonneau Dr, Vincent P. Desplat, John F. Elliott, Peter Watt

Bulletins 4000 -

The lyre vine training system uses wide rows, an open canopy, and shoot positioning to increase grape maturity and quality while maintaining production levels. It is so named because the end-on view of the vine canopy trained to this type of trellis resembles the shape of the musical instrument, the lyre.

This improvement in quality has not only been established in the diverse experimental vineyards of the National Institute for Agronomic Research (INRA) in France but also in many commercial vineyards throughout the major wine growing regions of the world.

Santa Clara Magazine, Volume 35 Number 2, Spring 1993, Santa Clara University

Santa Clara Magazine

9 - HOW SCU ALUMS PUT CLINTON IN THE DRIVER'S SEAT Before there was a President Clinton, there was a long-shot campaign energized by SCU grads. In Ride Around America, White House Press Sec retary Dec Dee Myers '83 details some decisive days on the road to Washington (page 10). Voting the Unthinkable: Why Silicon Valley Got on the Clinton-Gore Bus by Susan Frey describes how Apple's Dave Barram MBA '73 convinced high-tech Republicans to take a chance on Clinton (page 14).

16 - HIV-POSITIVE One of every 250 Americans is infected with the AIDS-causing human immunodeficiency virus. This chilling, …

A Technical Paper On Automated Pouring And The Selection Process Used By One North American Foundry, R. Stanley Weaver

Graduate Research Papers

This report on automated pouring focuses on the selection process used by one North American iron foundry. The problem facing this facility and any operation wishing to implement this technology lies in the number of variables which must be addressed in their quest for a suitable system.

Bulletin - Spring, 1993, Civil Aviation Medical Association

Browse all Civil Aviation Medical Association Newsletters

A sixteen page newsletter of the Civil Aviation Medical Association. The newsletter provided news about civil aviation medicine and information related to the organization.

Analysis Of Pultrusion Processing For Long Fiber Reinforced Thermoplastic Composite System, Wen Tso

Mechanical & Aerospace Engineering Theses & Dissertations

Pultrusion is one of the composite processing technology, commonly recognized as a simple and cost-effective means for the manufacturing of fiber-reinforced, resin matrix composite parts with different regular geometries. Previously, because the majority of the pultruded composite parts were made of thermosetting resin matrix, emphasis of the analysis on the process has been on the conservation of energy from various sources, such as heat conduction and the curing kinetics of the resin system. Analysis on the flow aspect of the process was almost absent in the literature for thermosetting process. With the increasing uses of thermoplastic materials, it is desirable …

Competitive Enzyme Immunoassay By Polyclonal Antibodies Against Organophosphorus Pesticides, Kuo-Lan Wen

Theses and Dissertations in Biomedical Sciences

Organophosphorus compounds (OPs) comprise one of the major classes of pesticides in use today because they are highly effective and less toxic. Because of their extensive use, there is a need for monitoring OPs in water and vegetables. Gas chromatography (GC) is the usual method for OPs screening, but it is time-consuming and has the high cost of instrumentation. The goal of this project was to find an easy method which was sensitive and had less instrumentation required to test OPs.

Microwells and microtubes were utilized as the solid-phase immobilization for the development of an enzyme immunoassay for OPs. A …

Analysis Of Weighted Fan-Out/Fan-In Volume Holographic Interconnections, Gregory P. Nordin, P. Asthana, B. Keith Jenkins, A. R. Tanguay

Faculty Publications

The feasibility of employing volume holographic techniques for the implementation of highly multiplexed weighted fan-out/fan-in interconnections is analyzed on the basis of interconnection fidelity, optical throughput, and complexity of recording schedule or implementation hardware. These feasibility criteria were quantitatively evaluated using the optical beam propagation method to numerically simulate the diffraction characteristics of volume holographic interconnections recorded in a linear holographic material. We find that conventional interconnection architectures (that are based on a single coherent optical source) exhibit a direct trade-off between interconnection fidelity and optical throughput on the one hand, and recording schedule or hardware complexity on the other. …

Integrating Psychological Operations Into The Joint Theater Level Simulation (Jtls), C. Matthew Pecot Iii

Theses and Dissertations

This thesis provides a prototype and methodology for integrating psychological operations (PSYOP) into the Joint Theater Level Simulation (JTLS) combat model. The requirement rose out of the need for aggregate-level training models to reflect the role of PSYOP so that commanders and their staffs can learn how to manage plan for, and conduct PSYOP within the context of AirLand battle doctrine. As the JTLS model currently exists, there is no representation of psychological operations whatsoever. This thesis outlines a methodology for incorporating the PSYOP analysis process (including the target audience analysis), the PSYOP product development and production process, the PSYOP …

Terrain Classification In Sar Images Using Principal Components Analysis And Neural Networks, Mahmood R. Azimi-Sadjadi, Saleem Ghaloum, R. Zoughi

Electrical and Computer Engineering Faculty Research & Creative Works

The development of a neural network-based classifier for classifying three distinct scenes (urban, park and water) from several polarized SAR images of San Francisco Bay area is discussed. The principal component (PC) scheme or Karhunen-Loeve (KL) transform is used to extract the salient features of the input data, and to reduce the dimensionality of the feature space prior to the application to the neural networks. Employing PC scheme along with polarized images used in this study, led to substantial improvements in the classification rates when compared with previous studies. When a combined polarization architecture is used the classification rate for …

Pavement Drainage And Pavement-Shoulder Joint Evaluation And Rehabilitation, Zubair Ahmed, Thomas D. White, Philippe L. Bourdeau

JTRP Technical Reports

The objectives of this research were i) to evaluate the performance of pavement subdrainage systems ii) study the behavior of moisture conditions below pavements and iii) provide recommendations for unproved drainage criteria based on analysis of field data. Existing and retrofitted subdrainage collector systems were inspected through external visual inspection in combination with a probe for internal inspection. Distresses and deficiencies in construction observed were listed and compiled on video. A methodology for inspection is presented that can be used by highway agencies in monitoring the condition, need for maintenance, and performance of collector systems. Pavements with various types of …

Acuta Enews February 1993, Vol. 22, No. 2

ACUTA Newsletters

In This Side

Region Director Nominations

President's column

Institutional Excellence Award

Drew Uinv. Voice Mail

New Publications Editor

Miami Univ. Voice Mail

Tampa Exhibits Review

Executive Director

Why American Engineers Aren't Unionized - A Comparative Perspective, Peter F. Meiksins, Chris Smith

Sociology & Criminology Faculty Publications

This article presents a comparative perspective on why U.S. engineers are not unionized. The decline of organized labor in the U.S. has stimulated a new interest in comparative research. Explanations of the prolonged stagnation and contraction of the U.S. labor movement that focus on the U.S. alone run the risk of assuming that the U.S. case is normal, and that the decline of organized labor is a structural inevitability of advanced capitalism. By broadening their scope to include other industrialized countries with similar political economies and different labor histories, students of the labor movement will be better able to identify …