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Fellowship Program (NASA-CR -195533) RESEARCH REPORTS: 1y95-1a967 1994 NASA/AS€E SUMMER FACULTY --THRU-- F ECLUWSH IP PROGRAM Final Report N95-19016 < A 1 a bama Univ.) 302 p Unclas 42552 G3/80 0030890 NASA CONTRACTOR REPORT I I r ,a NASA CR- 196533 p ;*- RESEARCH REPORTS - 1994 NASNASEE SUMMER FACULTY FELLOWSHIP PROGRAM The University of Alabama Tuscaloosa, Alabama and The University of Alabama in Huntsville October 1994 Id Find Report Prepared for NASA, George C. Marshall Space Flight Center, Marshall Space Flight Center, Alabama 35812 h RESEARCH REPORTS 1994 NASNASEE SUMMER FACULTY FELLOWSHIP PROGRAM George C. Marshall Space Flight Center The University of Alabama Tuscaloosa, AL and The University of Alabama in Huntsville EDITORS : Dr. L. Michael Freeman Associate Professor of Aerospace Engineering The University of Alabama Dr. Charles R. Chappell Associate Director for Science Marshall Space Flight Center Dr. Frank Six University Mairs Officer Marshall Space Flight Center Dr. Gerald R. Karr Professor and Chairman of Mechanical and Aerospace Engineering The University of Alabama in Huntsville NASA CR- 196533 , TABLE OF CONTENTS I. Amin, Ashok T. University of Alabama in Huntsville MSFC Institutional Area Network and ATM Technology II. Anderson, Richard University of Missouri-Rolla A Comparison Between Using Incoherent or Coherent Sources to Align and Test 0 an Adaptive Optical Telescope * m. Antar, Basil N. The University of Tennessee Space Institute Bubble Formation in Microgravity IV. Benn, Karen P. Oakwood College The Assessment of Virtual Reality for Human Anatomy Instruction V. Bernsteh, Edward L. Alabama A&M University Residual Stresses in Welded Plates VI. Bucinell, Ronald B. Union College, Schenectady, NY Foreign Body Impact Event Damage Formation in Composite Structures VII. Campbell, C. Warren The University of Alabama in Huntsville A Finite Element Code for Electric Motor Design vm. caria9a,vikram Marquette University Concept of Using a Benchmark Part to Evaluate Rapid Prototyping Processes Ix. Chu, Tsuchin 4 Southern Illinois University at Carbondale Composite Structures for Magnetosphere Imager Spacecraft X. Clark, J0hnH.E. The Pennsylvania State University Implications of Summertime Marine Stratocumulus on the North American Climate XI. DeBrunner, Linda S. The University of Oklahoma Performance Evaluation of the Engineering Analysis and Data System (EADS)II XII. Feikerna, Douglas A. The University of Alabama in Huntsville Optical Measurements in Rocket Engine Liquid Sprays xm. Gerth, Richard J. The Ohio University Data Driven Propulsion System Weight Prediction Model XIV. Greenway, R. Bryan, Jr. University of Kansas Real-Time Thickness Measurement of MCC Ablator Material xv. Gross, R. Steven Auburn University Steady and Unsteady Blade Stresses Within the SSME ATD/"OTP Inducer XVI. Gudimetla, V.S.Rao Oregon Graduate Institute Special Relativity Effects for Space-Based Coherent Lidar Experiments xvn. Howard, Thomas G. Northwest-Shoals Community College Surface Roughness Measurements xvm. Isaac, Bryan J. Catawba College Probing the Chemistry of Nickel / Metal Hydride Battery Cells Using Electrochemical Impedance Spectroscopy XIX. Jackson, Jeff The University of Alabama A Hypertext-Based Internet-Assessable Database for the MSFC Technology Transfer Office xx. Jenkins, Rhonald M. Auburn University A Preliminary Analysis of Low Frequency Pressure Oscillations in Hybrid Rocket Motors iv XXI. Jones, Kenneth M. North Carolina A&T State University Development of CFD Model for Augmented Core Tripropellant Rocket Enghe XXII. Landrum, D. Brian The University of Alabama in Huntsville Computational Simulation of Liquid Fuel Rocket Injectors XXIII. Lindsey, Patricia F. East Carolina university Development of Microgravity, Full Body Functional Reach Envelope Using 3-D Computer Graphic Models and Virtual Reality Technology XXIV. Lo, Chor P. The University of Georgia A GIs Approach to Urban Heat Island Research: The Case of Huntsville, AL m. Luxemburg, Leon A. Texas A&M University Neural Networks Applications to Control and Computations m. Mahanta, Kamala The State University of New York College at Oneonta A CMC Database for Use in the Next Generation Launch Vehicles (Rockets) XXVII. Main, John A. Vanderbilt University Lean Spacecrafl Avionics Trade Study xxvm. Matthys, Donald R Marquette University MA" - A Program to Transfer Designs for Difiactive Optical Elements to a MA" Photolithographic Mask Generator XXIX. Mazzoleni, Andre P. Texas Christian University Design of High Pressure Waterjet Nozzles xxx. Moriarity, Debra M. The University of Alabama in Huntsville Concentration and Temperature Effects on Ovostatin Activity XXXI. Noble, Viveca K. Tuskegee University Error Coding Simulations in c V XXXII. Olivier, Philip D. Mercer University A New Piston Control Strategy for Segmented Mirrors XXMII. Pearson, Earl F. Western Kentucky University Growth of Thin Films of Dicyanovinylanisole on Quartz and Teflon-Coated Quartz by Physical Vapor Transport m. Phanord, Dieudonnk D. University of Wisconsin at Whitewater Two Space Scatterer Formalism Calculation of Bulk Parameters of Thunderclouds t xxxv. Santi, L. Michael Christian Brothers University Evaluation of SSME Test Data Reduction Methods XXXVI. Schonberg, William P. The University of Alabama in Huntsville Cracking Characteristics of a Habitable Module Pressure Wall Following Orbital Debris Penetration XXXVII. Schreur, Barbara Texas A&M University - Kingsville Evaluation of the Efficiency and Reliability of Software Generated by Code Generators XXXVIII. Smith, Willard A. Tennessee State University A Report of Work Activities on the NASA Spacelink Public Electronic Library XXXIX. Solakiewicz, Richard Chicago State University Scattering of Point Source Illumination by an Arbitrary Configuration XL. Talia, George E. The Wichita State University Microstructural Analysis of Cracks Generated During Welding of 2 195 Aluminum- Lithium Alloy XLI. Tawfik, Hazem State University of New York at Farmingdale Quality Optimization of Thermally Sprayed Coatings Produced by the JP-5000 (HVOF) Gun Using Mathematical Modeling vi XLII. Taylor, Charles R. Pacific University Prism Project Optical Instrument XLm. Temple, Enoch C. Alabama A&M University The Probability of Flaw Detection and the Probability of False Calls in Nondestructive Evaluation Equipment 0 XLIV. Walsh, Daniel W. California Polytechnic State University * The Effect of Fabrication on Corrosion in Alumina 2 195: Environmental and Microstructural Considerations XLV. Wan& Jai-Ching Alabama A&M University Numerical Formulation of Composition Segregation at Curved Solid-Liquid Interface During Steady State Solidification Process XLW. Wang, Francis C. The University of Alabama in Huntsville Effects of Vibration (G-JITTERS)on Convection in Micro-gravity XLVII. Williams, George O., Jr. Calhoun Community College Capillary Electrophoresis: Biotechnology for Separation of DNA and Chromosomes XLVIII. Wilson, Lori J. East Tennessee State University Salt-Induced Aggregation of Lysozyme: Implications for Crystal Growth XLm. Wohlman, Richard A. Western Carolina University A Technique for Determining Cloud Free vs. Cloud Contaminated Pixels in Satellite Imagery vii N95- 18968 //2 55-3 1994 P 7 NASA/ASEE SUMMER FACULTY FELLOWSHIP PROGRAM MARSHALL SPACE FLIGHT CENTER THE UNIVERSITY OF ALABAMA MSFC INSTITUTIONAL AREA NETWORK AND ATM TECHNOLOGY Prepared By: Ashok T. Amin Academic Rank: Associate Professor Institution and Department: The University of Alabama in Huntsville Computer Science Department NAS A/MSFC: Laboratory: Information Systems Office Division: Systems and Integration Engineering MSFC Colleagues: AlanForney Michael Savage I 1. INTRODUCTION The New Institutional Area Network (NEWIAN) at Marshall supports over 5000 end users with access to 26 file servers providing Work Presentation Services. It comprises of some 150 Ethernet LANs interconnected by bridgeshouters which are in turn connected to servers over two dual FDDI rings. The network supports various higher level protocols such as IP, IPX, AppleTaUc (AT), and DECNet. At present IPX and AT protocols packets are routed, and IP protocol packets are bridged, however work is in progress to route all IP packets. We examine the impact of routing IP packets on the network operation. Broadband Integrated Services Data Network (BISDN), presently at various stages of development, is intended to provide voice, video, and data transfer services over a single network. BISDN will use Asynchronous Transfer Mode (ATM) as a data transfer technique which provides for transmission, multiplexing, switching, and relaying of small size data units called cells. Limited ATM Wide Area Network (WAN) services are offered by Wiltel, AT&T, and Sprint and others. NASA is testing a pilot ATM WAN with a view to provide Program Support Communication Network services using ATM. ATM supports wide range of data rates and quality of service requirements. It is expected that ATM switches will penetrate campus networks as well. However, presently products in these areas are at various stages of development and standards are not yet complete. We examine development of ATM to help assess its role in the evolution of NEWLAN. 2. ROUTING VERSUS BRIDGING OF IP IN THE NEWIAN The Internet Protocol (IP) is the network layer protocol of the TCP/IP suite of protocols. The unit of the data transferred between network layer entities is called a packet. A host on the Internet has a globally unique 32-bit IP address and is typically written in the form
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