Engineering Commons^™

Axon: Application-Oriented Lightweight Transport Protocol Design, James P.G. Sterbenz, Gurudatta M. Parulkar

All Computer Science and Engineering Research

This paper describes the application-oriented lightweight transport protocol for object transfer (ALTP-OT) in the Axon host communication architecture for distributed applications. The Axon Project is investigating an integrated design of host architecture, operating systems, and communication protocols to allow the utilization of the high band-width provided by the next generation of communication networks. ALTP-OT provides the end-to-end transport of segment and message objects for interprocess communication across a very high speed internetwork, supporting demanding applications such as scientific visualization and imaging. ALTP-OT uses rate-based flow control specifically oriented to the transfer of objects directly between application memory spaces. This document …

Axon: A High Speed Communication Architecture For Distributed Applications, James P.G. Sterbenz, Gurudatta M. Parulkar

All Computer Science and Engineering Research

There are two complementary trends in the computer and communication fields. Increasing processor power and memory availability allow more demanding applications, such as scientific visualization and imaging. Advances in network performance and functionality have the potential for supporting programs requiring high bandwidth and predictable performance. However, the bottleneck in increasingly in the host-network interface, and thus the ability to deliver high performance communication capability to applications has not kept up with the advances in computer and network speed. We have proposed a new architecture that meets these challenges called Axon, whose novel aspects include: an integrated design of hardware, operating …

Ampliative Inference, Computation, And Dialectic, R. P. Loui

All Computer Science and Engineering Research

There are three theses here: • Non-computationally conceived inference merely expands notation. This includes induction as well as deduction, and thus both deserve the adjective non-ampliative. Deriving entailments merely expands shorthand. All of the familiar formalisms for reasoning do just this. • There now exist examples of formalism for reasoning that do something else. They are deliberative, and to say in what way they are deliberative requires reference to the process through which they compute their entailments. • The original ampliative/non-ampliative terminology best survives as referring to this new distinction. Viewed formally, all other attempted distinctions either presume deduction to …

1989 Usage Rates And Effectiveness Of Safety Belts And Child Safety Seats In Kentucky, Kenneth R. Agent

Kentucky Transportation Center Research Report

The objective of the survey summarized in this report is to establish 1989 safety belt and child safety seat usage rates in Kentucky to compare to those determined from previous surveys. Also included in this report is an analysis of accident records evaluating the effectiveness of safety belts.

Statewide usage rates in the 19 cities previously surveyed in 1982 through 1988 showed that driver safety belt usage increased substantially in 1989 while child safety seat usage stabilized in 1989 at close to the 1988 level. The statewide usage rate of safety belts by drivers was 25.5 percent in 1989 compared …

Analysis Of Edge Drains On Western Kentucky Parkway Milepost 83 To Milepost 90, David L. Allen

Kentucky Transportation Center Research Report

On August 14. 1989. the Kentucky Transportation Cabinet requested the Kentucky Transportation Center (KTC) to investigate an apparent drainage problem on the Western Kentucky Parkway. The area of concern was a rehabilitation project starting at Milepost 83 and ending at Milepost 90. The old PCC pavement was being broken and seated and was being overlayed with approximately five inches of asphaltic concrete. Longitudinal edge drains (Hydraway brand) were installed in 1988, but the PCC pavement was not broken until July, 1989. Two inches of asphaltic concrete base were placed over the old broken pavement, and were used as a driving …

Safety Belt Usage In Lexington And Opinion Of A Mandatory Safety Belt Law, Kenneth R. Agent, Jerry G. Pigman

Kentucky Transportation Center Research Report

One objective of this study was to obtain data from a large number of locations within Lexington to determine the extent that safety belt usage varies within the city. An observational survey was conducted at two locations in each of 12 geographic zones in Lexington. Overall safety belt usage rates of 37.6 percent for drivers and 65.1 for children under four years of age were observed using data collected in all 12 zones. Rates were higher in zones in the southern half of Lexington. Usage rates for drivers ranged from 31.9 to 43.5 percent in the various zones while the …

Pavement Inspection Derbyshire Estates, R. Clark Graves, David L. Allen

Kentucky Transportation Center Research Report

The subject project was constructed in the fall of 1988. Soon after construction, the pavement began to deteriorate. Areas of alligator cracking were observed along with extensive rutting and pushing of the asphaltic concrete. Distresses occurred soon after the roadway was completed. Personnel of the Jefferson Co. Public Works Department requested that Kentucky Transportation Center (KTC) personnel make a preliminary inspection.

Kentucky Transportation Center (KTC) personnel conducted preliminary tests at the site on July 11, 1989. Results of tests were outlined in a letter to Schimpeler-Corradino Associates, on July 19, 1989. After review, of those results, Schimpeler-Corradino principals requested that …

Test 1626: John Deere 4055 Quadrange Diesel 16-Speed, Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF THE TEST PROCEDURE General Tractors are tested at the University of Nebraska according to the Agricultural Tractor Test Code approved by the American Society of Agricultural Engineers and the Society of Automotive Engineers or official Nebraska test procedure. The manufacturer selects the tractor to be tested and certifies that it is a stock model. Each tractor is equipped with the common power consuming accessories such as power steering, power lift pump, generator, etc., if available. Power consuming accessories may be disconnected only when the means for disconnecting can be reached from the operating station. An official representative of …

Paper El-89-10 V. 1: Fort Monmouth, New Jersey, Water Distribution Systems, Wayne W. Sharp, Donald V. Chase, P. R. Schroeder

Civil and Environmental Engineering and Engineering Mechanics Faculty Publications

This report was prepared by the Environmental Laboratory (EL), US Army Engineer Waterways Experiment Station (WES), in partial fulfillment of Reimbursable Order No. 88-G4-07 from the Fort Monmouth Directorate of Engineering and Housing (DLH), Fort Monmouth, NJ.

The report was prepared by Mr. Wayne W. Sharp, Mr. Donald V. Chase, and Dr. Paul R. Schroeder of the Water Resources Engineering Group (WREG), Environmental Engineering Division (EED), EL. The work was accomplished under the direct supervision of Dr. John J. Ingram. Chief, WREG, and Dr. Raymond L. Montgomery, Chif, EED: qnA -Asr the general supervision of Dr. John Keeley, Assistant Chief, …

Test 1628: John Deere 4455 Quadrange Diesel 16-Speed, Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF THE TEST PROCEDURE General Tractors are tested at the University of Nebraska according to the Agricultural Tractor Test Code approved by the American Society of Agricultural Engineers and the Society of Automotive Engineers or official Nebraska test procedure. The manufacturer selects the tractor to be tested and certifies that it is a stock model. Each tractor is equipped with the common power consuming accessories such as power steering, power lift pump, generator, etc., if available. Power consuming accessories may be disconnected only when the means for disconnecting can be reached from the operating station. An official representative of …

Efficient Interconnection Schemes For Vlsi And Parallel Computation, Ronald I. Greenberg

Computer Science: Faculty Publications and Other Works

This thesis is primarily concerned with two problems of interconnecting components in VLSI technologies. In the first case, the goal is to construct efficient interconnection networks for general-purpose parallel computers. The second problem is a more specialized problem in the design of VLSI chips, namely multilayer channel routing. In addition, a final part of this thesis provides lower bounds on the area required for VLSI implementations of finite-state machines. This thesis shows that networks based on Leiserson's fat-tree architecture are nearly as good as any network built in a comparable amount of physical space. It shows that these "universal" networks …

Aluminum Deposition On Polyimides: The Effect Of In Situ Ion Bombardment, M. J. Vasile, Bonnie Bachman

Economics Faculty Research & Creative Works

The chemistry of the Al polyimide interface is examined by x‐ray photoelectron spectroscopy sputter profiling. Al deposited on polyimide films without an in situ Ar backsputter shows a clearly defined 50‐Å Al₂O₃ layer just prior to the polyimide. This layer is identified by the O/Al atom ratio at 1.5, and the binding energy of the Al 2p transition. There is a clear separation of the Al/Al₂O₃/polyimide layers in the sputter profiles. Deposition of Al on polyimide surfaces after Argon backsputtering produces a diffuse Al/polyimide interface with no Al₂O₃ present. There …

Irish Building Services News

Building Services Engineering

No abstract provided.

Mocvd Of Cds Onto (111) Silicon Substrates, Jack L. Boone, Scott A. Howard, Don D. Martin, Gene Cantwell

Electrical and Computer Engineering Faculty Research & Creative Works

Thin films of CdS were grown onto (111) silicon substrates (wafers 2 in in diameter) by employing a horizontal, low-pressure MOCVD system. The observed growth of heteroepitaxial films occurred in the temperature range of 275-325 ±5 °C. The growth of polycrystalline samples with a high degree of preferred orientation occurred at temperatures above 325 ± 5 °C. The later films exhibited irregularly shaped surface pits about 1 μm in depth. These pits were observed by sectioning the substrates and examining them with an SEM; no significant crystallinity was apparent. X-ray analysis of an heteroepitaxial and a polycrystalline film via a …

Aerodynamic Forces On Flight Crew Helmets, Timothy A. Sestak, Richard M. Howard, Chester A. Heard

Publications

Wind tunnel tests were conducted to deter- mine the aerodynamic forces generated on aircrew flight helmets. Three helmets were tested: two used by aircrews flying ejection seat aircraft in the U.S. military, the Navy HGU-33/P and the Air Force HGU-53/P; and one prototype helmet of significantly different shape and volume. Axial and normal forces were measured through a range of pitch and yaw angles. It was found that large forces exist tending to promote helmet loss during ejection, and that simple modifications to the current helmet configurations can reduce those forces by as much as 40%. It is demonstrated that …

Protein Separation With Mathematical Modeling For Chromatographic Operation, Hsien-Chih Ma

Dissertations

We have performed experiments and derived mathematical models for packed bed columns used for liquid phase chromatographic separations of proteins with impulse input of feed solutions. These models can now be used to describe the relationships between the elution characteristics (peak height, peak position, and shapes) and the operating conditions (flow rate and buffer conditions) of ion exchange and gel permeation column chromatography for protein separations.

The surface adsorption model was discussed relative to the nature of the mobile and stationary phases in ion exchange column chromatography for two distinct cases: with and without pore diffusion. For large solute molecules, …

Effects Of N>M Clos Networks On Edge Coloring And Matrix Decomposition Algorithms, Ming-Hsing Lin

Theses

Considered in this thesis are n > m Clos networks on edge coloring and matrix decomposition algorithms. This work uses a two-fold approach to examine the effects of n > m Clos networks on edge coloring and matrix decomposition algorithms. First, edge coloring and matching on bipartite multigraphs are applied to routing on Clos networks. It is demonstrated that edge coloring algorithms which find a minimum edge coloring set up the routing for n > m Clos networks with redundancy. The results presented here indicate that the Euler coloring algorithm has applications on n > m Clos networks because it has fast time complexity …

A Comparison Of The Fracture Toughness, Hardness, Impact Strength, And Thermal Expansion Of Two Dental Porcelains, Nancy Maignon

Theses

Dental Porcelains are known to be very brittle materials. Ongoing research is being undertaken to obtain a porcelain of optimum strength. A recent development in this field is the new porcelain Optec HSP.

In this comparative study, a series of mechanical test were performed on both Optec HSP and Ceramco II.

An indentation technique was used to calculate the hardness and fracture toughness, the Izod method with a 1 ft-lb pendulum was used to obtain the impact strength, and the thermal expansion was calculated with the Dupont thermal analyser.

For each material, a sample size of five and twenty specimens …

Protocol Processing Delay Analysis On Ethernet By Simulation Of Njit Ethernet, Jagdish Gangrimal Rangwani

Theses

CSMA/CD based Local Area Networks account for about 75% of the installed LAN base today. As these networks are becoming available for high channel bandwidth, it is important to identify the bottlenecks in these networks. As channels are becoming high speed, bottleneck is shifting from channel to protocol processing. This delay depends on a particular implementation of the protocol and not the protocol standard itself.

This Thesis presents the analysis of delay on Ethernet. To achieve realistic results NJIT Ethernet, as it is configured, is modelled and simulated. Traffic on this network is measured and load on each segment is …

A Cad For Edif Pattern Generation, Mohammad Akram Khan

Theses

Generating a set of test vector for a digital circuit is the most critical step in design and test. It is very important to generate test sequence easily and efficiently. The importance is enhanced by the fact that the simulation database is being used to create test programs. A CAD tool ATPG (Automatic Test Pattern Generator) has been developed to specify and satisfy requirements of designers and test engineers. EDIF (Electronic Design Interchange Format) is followed closely. EDIF targets compatability among foundry services and CAD/CAE systems.

Semiconductor Pressure Sensor And Amplifier With Extended Temperature Range, Abhay Mahadeo Joshi

Theses

In this thesis work, a unique raicrosensor was designed for pressure measurements over the temperature range of -80 C to 125 C. The sensor has CMOS circuitry powered by a single voltage supply. It can be used for military and space applications including monitoring the pressure acting on the nose of the space shuttle.

The sensor consists of a thin silicon diaphragm, which is stressed by external pressure. Four resistors in a Wheatstone bridge configuration are diffused into the diaphragm. The temperature drift in the silicon sensors is dominated by the temperature dependence of the piezoresistive coefficients. The resistors are …

Optimization Of Throughput And Stability For Csma/Cd Channel, Liangshyng Jou

Theses

Multiple access technologies plays an important role in designing distributed computer communication system. Here, CSMA/CD has attracted researchers' attentions in the last ten years. In this paper, based on attributions of the slotted, nonpersistent CSMA/CD system, performance of CSMA/CD channel is analyzed. Adaptive Retransmission Technique is adopted to obtain the maximum throughput. Also, equilibrium contours are derived to discuss the stability of the system. And use FET to measure the stability of CSMA/CD channel that FET gives an approximate measure of the average uptime of an unstable channel.

On Implicational Dependency Families Possessing Finite Armstrong Relations, Kazem Taghva

Electrical & Computer Engineering Faculty Research

Let X ≠ 0 be a finite collection of nonempty relations over the relation scheme R(A1, A2 , ... , A,.); then the closure of X under embedding and direct product (up to isomorphism) is a finitely generated Implicational Dependency family (ID-family) generated by X. In this paper, we show that the class of finitely generated ID-families is identical to the class of those ID-families which possess a finite Armstrong relation.

Acuta Enews August 1989, Vol. 18, No. 8

ACUTA Newsletters

In This Issue

ACUTA Conference o Success in Philly!

PHILADELPHIA BOARD MEETING

MESSAGE FROM THE PRESIDENT

First Timers Contest

USER Groups

Party Line

Xeriscape: Landscape That Saves, Florida Solar Energy Center, Carolyn King Burns

FSEC Energy Research Center®

Today's headlines trumpet urgent energy concerns. Still, there are ways in which individual effort cumulatively can slow, stop, and even reverse the negative impact of poor conservation habits.

Landscaping spends energy in a variety of ways: in the manufacture and use of fertilizers; in the manufacture, use, and fueling of landscaping equipment; in the production and distribution of our water supply; and in physical effort. But Xeriscaping saves energy.

With 800 - 900 people a day moving to the land of sunshine, water is increasingly precious. In Florida outdoor irrigation alone can consume up to 50 percent of the average …

Quantification Of Refining Actions, Hari R. Goyal

Masters Theses

The repeated action of compression-decompression pulses on a wet web of fiber, created by dropping a weight from a height, loosens the internal structure of the fiber. The impaction of fiber did not cause any change in average weighted fiber length, fine content or Canadian Standard Freeness. The sheet made from these fibers showed an increase in tensile strength with increased number of impacts or impact intensity.

In a blend of impacted fibers (internally fibrillated), abraded fibers (externally fibrillated) and fines (fibers shorter than 0.23 mm and created by prolonged beating in a Valley beater), fines were found to be …

An Ergonomic Training Program For Manual Handling Tasks, Akhilesh Agrawal

Masters Theses

The objective of this study was to test whether or not muscular endurance of individuals engaged in industrial manual handling tasks can be improved through a short and intensive training program. This investigation also involved the study of the effect of muscular endurance training program on muscular strength.

The study revealed that, over a six-week period, the muscular endurance can be improved significantly. After sixteen sessions of training, the endurance time increased over 500% for manual materials handling tasks and over 1200% for upper extremity manual handling tasks. The endurance training program, however, did not increase both static and dynamic …

Spontaneous Mode Locking In Long-Cavity Xenon Lasers, Manuela Fe Tarroja, Mohammad Sharafi, Lee W. Casperson

Electrical and Computer Engineering Faculty Publications and Presentations

Spontaneous mode locking in Fabry—Perot xenon lasers has been experimentally investigated for cavity lengths up to 66 m. Our results show dependence of the number of pulses per round-trip time on the cavity length and the excitation current. Other dynamical effects such as the ringing and modulation of the mode-locked pulses have been observed. A semiclassical model for the self-locking of an inhomogeneously broadened laser is also presented. Numerical results based on this model describe many dynamical features observed in our experiments.

Host-Network Interface Architecture For Gigabit Communications, James P. G. Sterbenz

All Computer Science and Engineering Research

There are two complementary trends in the computer and communications fields. Increasing processor power and memory availability allow more demanding applications, such as scientific visualizations and imaging. Advances in network performance and functionality have the potential for supporting applications requiring high bandwidth communications. However, the bottleneck is increasingly in the host-network interface, and thus the ability to deliver high performance communications capability to applications has not kept up with the advance in computer and network speed. We have proposed a new architecture that meets these challenges, called Axon. The Axon thesis is that an essential requirement for the support of …

Agricultural Mechanics Instruction In Nebraska Secondary Vocational Agriculture Programs For The 1990s, Neal Joseph Schlautman

Department of Agricultural Leadership, Education, and Communication: Dissertations, Theses, and Student Research

The study was conducted to determine agricultural mechanics units of instruction that should be included and the extent to which they should be included in the Nebraska high school vocational agriculture curriculum in the 1990's as perceived by three respondent groups. The respondent groups included 36 vocational agriculture instructors, 36 farm operators and 36 managers of mechanics related agribusinesses in Nebraska. A mailed survey was used to collect data for the study. The survey return rate for the vocational agriculture instructors was 100 percent, the return rate for the farm operators was 89 percent and the return rate for the …