Operations Research, Systems Engineering and Industrial Engineering Commons^™

Acuta Enews December 1992, Vol. 21, No. 12

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Regulatory update

President's column

Dual routing protects Duke

Talking clock "tells" time

Seminar ratings

Director's column

Acuta Enews November 1992, Vol. 21, No. 11

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Interchangeable NPA, NNX

President's Message

Permanent 800 numbers

Industry/ Regulatory updates

Making voice mail effective

The fax-on-demand solution

Acuta Enews October 1992, Vol. 21, No. 10

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CMSU testing VISIT

President's message

A telecom intern's report

Annual ACUTA budget

Answers from "Regional Feud"

Membership Director's report

Acuta Enews Septmber 1992, Vol. 21, No. 9

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Merging technologies to compete

President's column

Award, election winners

Innovation spurs productivity

Conference evaluations

Welcome to new members

Acuta Enews August 1992, Vol. 21, No. 8

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FCC gives nod to touch-tone video

President's column

West Chester starting student resale

Security at Yale

ACUTA Calender

Phone taps snare hackers

Acuta Enews July 1992, Vol. 21, No. 7

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President's column

Two Region Directors elected

Party Line

Northeast Region meeting

Introduction To Intellisim 1.0, Paul Savory

Department of Industrial and Management Systems Engineering: Faculty Publications

IntelliSIM is a prototype for a new generation of knowledge-based simulation tool that has been developed by the Systems Simulation Laboratory at Arizona State University. This tool is a computer environment that allows non-simulation trained modelers to predict the performance of a manufacturing system for which the necessary data is available. The system provides predictive data on such items as throughput time, queue levels, equipment utilization, reactions to machine failures, etc. With IntelliSIM, the benefits of discrete-event simulation can be exploited without requiring the high level of expertise necessary to successfully conduct a sound simulation study. The approach offered with …

Acuta Enews June 1992, Vol. 21, No. 6

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Connectivity, Database Center

President's column

WISE participants

Billed party preference

Keene State gets "slammed"

New Membership Director

Acuta Enews May 1992, Vol. 21, No. 5

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Nominations for officers sought

President's column

AT&T opens development site

Northeast regional meeting

Acuta Enews April 1992, Vol. 21, No. 4

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Call for Award nominations

President's column

Managing Telecom review

Creighton opens access, ends fraud

Membership Service Coordinator

San Francisco registration form

Acuta Enews February 1992, Vol. 21, No. 2

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Call for RD Nominations

President's column

Workshop announcement

Alabama college takes case to PSC

Party Line

Rating to Tucson seminars

Acuta Enews January 1992, Vol. 21, No. 1

ACUTA Newsletters

In This Issue

Are you ready for the ADA?

Alabama regulators take aim at campus phone services

NATA asks that blocking services be mandatory for LECS

Distance education programs, technology continue to mature

Message From The President

Merging technologies may mean crossfire of competition

Monographs: opportunity to share knowledge

ADA to have far-reaching effect on telecommunications

Party Line

Annenberg announces distance learning grants

Marketplace Update

The Application Of Ultrasonic Surface Detectors To Hopper Dredge Production Monitoring, Stephen H. Scott, Angela Freeman

US Army Research

Ultrasonic surface detectors were installed on the us Army Corps of Engineers hopper dredge WHEELER for measuring dredge production. Ultrasonic sensors were installed over the bow and stern of the vessel, port and starboard, to measure vessel draft as a function of dredged material load in the hopper. Four ultrasonic sensors were installed over the hopper to measure the bin water depth in the hopper. This paper describes the ultrasonic sensor operation and installation, and data acquisition and analysis for the test series.

Reduced Recharge Capacity Of A Pump And Treat System, Cynthia L. Teeter, Douglas Gunnison, Norman R. Francingues, Mark E. Zappi

US Army Research

The North Boundary treatment system at Rocky Mountain Arsenal (RMA), Commerce City, Colorado, involves pumping of contaminated groundwater from an unconfined aquifer from one side of a soil-bentonite (SB) slurry wall to three pulsed-bed activated carbon adsorbers and prefilter and postfilter systems. The treated water is injected into the unconfined aquifer on the other side of the slurry wall via 38 recharge wells and 15 recharge trenches, collectively referred to as the recharge system. Recharge capacity of the recharge system has declined over time, limiting the operating capacity of the system. Two probable causes for reduction of the recharge systems …

Three-Dimensional Incompressible Flow Calculations With Maccormack's Method, Robert S. Bernard, Michael L. Schneider

US Army Research

MAC3D is a finite-volume computer code that uses MacCormack's method to calculate three-dimensional incompressible flow on staggered Marker-and-Cell grids. The code accepts nonuniform, nonorthogonal grids for any curvilinear domain that can be mapped onto a single rectangular block. It is applicable for free-surface flow at low Froude number, and for confined flow in general. Computed results from MAC3D are presented for laminar flow in channels with internal obstacles and curved boundaries.

Improved Thermal Predictions In Ce-Qual-W2, Raymond S. Chapman, Thomas M. Cole

US Army Research

Recent modifications to the transport scheme within the two-dimensional hydrodynamic and water quality model CEQUAL- W2 have resulted in a significant improvement in the prediction of temperature distributions by reducing numerical diffusion. These changes allow for a more accurate description of wind effects in the model. This paper briefly describes the modifications to CE-QUAL-W2 and presents results of two simulations both with and without the improvements to the transport algorithm.

Hydrodynamics For Water Quality Models, Mark Dortch, Billy Johnson

US Army Research

During the past decade, the US Army Engineer Waterways Experiment station (WES) has developed and applied a variety of numerical water quality models for surface waters. In most cases, the transport terms of these models have been computed using output from numerical hydrodynamic models. This paper summarizes the experience of linking water quality models to hydrodynamic models and examines the need for such linkages.

Verification Techniques Used In Modeling Charleston Harbor, South Carolina, Samuel B. Heltzel

US Army Research

Verification to field data provides a means to assess a model's ability to reproduce behavior of the natural system being modeled. Often neither time nor funds are available to collect extensive sets of field data, and alternate techniques are required. This study used the results of a laterally averaged model to provide limited verification for a two-dimensional depthaveraged hydrodynamic and sediment model.

This numerical model investigation used the US Army Corps of Engineers TABS-MD numerical modeling system for open channel flow and sedimentation. Boundary conditions and a verification data set were obtained from the laterally averaged numerical model FIne-Grained Bed …

Flow Impingement Velocities, Snake River, Wyoming, Stephen T. Maynord

US Army Research

Flow impingement, which occurs when approach channels direct flow into a bank line at large acute angles, results in flow concentration along bank lines, which creates large forces on bank material or bank protection. As part of studies conducted to determine the required riprap size for impinged flow, velocities were measured on the Snake River near Jackson, Wyoming. High velocities and steep water-surface slopes were observed at each impingement site.

Release Alternatives On A 3-D Salinity Simulation, Bernard B. Hsieh

US Army Research

Hydraulic structures such as darns, locks or diversion gates, in the upstream or tributary of an estuary system can control necessary freshwater discharge to meet downstream water quality standards. One of the most significant purposes of these structures is maintaining target salinity to satisfy the environment concerns, such as fishery spawning in the high-flow season and drinking water criteria in the low-flow period. In order to evaluate possible alternative regulations for the reservoir operation, a reliable three-dimensional (3-D) hydrodynamic model is required as a management tool to simulate the impact of salinity variations due to release policy changes. This paper …

Gas Transfer In Diffused Bubble Plumes, Steven C. Wilhelms, Sandra K. Martin

US Army Research

The gas transfer in aeration systems is broken into two processes: gas transfer at the bubble interface and gas transfer at the water surface. Experiments were conducted to separate these two sources of dissolved gas. Oxygen absorption was measured in a laboratory tank with air being diffused through a porous diffuser and then with nitrogen gas being diffused. The combination of these experiments along with reformulation of the theoretical transfer equation permit separation of the gas transfer at the water surface and in the rising bubble plume. Estimates of the exchange coefficient for the plume and surface are given.

Hydraulic Structures Versus Zebra Mussels, John J. Ingram, Andrew C. Miller

US Army Research

The United States Army Corps of Engineers (USAE) has begun a four-year research program to develop environmentally sound control strategies for zebra mussel (Dreissena polymorpha) infestations at public facilities. The USAE Waterways Experiment Station has initiated research for these facilities which include water-intake structures, navigation locks, gated dams, outlet works, pumping plants, hydropower plants, drainage structures, dredges and commercial vessels.

Levee/Floodwall Freeboard Design For An Urban Flood Control Project, Daniel B. Pridal, Edward F. Sing

US Army Research

A methodology for the design of levee/floodwall freeboard using evolving guidelines based on the concept of superiority is presented. A case study illustrating the application of the freeboard design guidelines to the Truckee Meadows Project is shown. The Truckee Meadows Project provides a 100 year level of flood protection through the Reno-Sparks, Nevada metropolitan area along an approximate ten mile reach of the Truckee River. Major features of the project include levees, floodwalls, channel modifications, bridge replacement or reconstruction, a detention basin, and drainage improvements. The project is presently in the Preconstruction, Engineering and Design (PED) Phase within the Sacramento …

Stable Channel And Environmental Design Considerations For An Urban Flood Control Project, Edward F. Sing, Daniel Pridal, Thea Lane

US Army Research

A case study will be presented of a two phase process of development of the hydraulic design of a flood control project incorporating a creek nestled within an urban greenbelt. The green belt reach consists of the existing, 5 to 15 foot wide tree-lined, low flow channel set within an approximate 100 to 150 foot wide floodway to be created by low berms. Any project features proposed for this reach would need to be environmentally and aesthetically acceptable. The design approach taken in developing the flood control and channel stabilization plan for the greenbelt reach will be presented. This approach …

Computation Of Long-Term Three-Dimensional Hydrodynamics Of New York Bight, Keu W. Kim, David J. Mark, Norman W. Scheffner, Lynn M. Bocamazo

US Army Research

A time-varying three-dimensional (3D) numerical hydrodynamic model has been applied to the New York Bight to provide flow fields to a 3D water quality model. The spatial computational domain extends from Cape May, New Jersey at its south-west end and Narragansett Bay, Rhode Island, at the north-east end and seaward to the shelf-break. As illustrated below, the numerical model has more than 2500 active horizontal cells and ten vertical layers. Features of the hydrodynamic model include coupling of temperature grids to better represent geometric features, and an algebraic vertical turbulence model based upon the assumption that turbulence production and dissipation …

Revised Hydraulic Design Of The Los Angeles County Flood Control System, Michael E. Mulvihill, Scott E. Stonestreet

US Army Research

The US Army Engineer District, Los Angeles, recently completed a study regarding the adequacy of an existing flood control system in Los Angeles County. Results of this study indicate that the level of protection afforded by the system is as low as 25-year in heavily urbanized areas. The Corps of Engineers plans to increase the capacity in two mainstem channels, raising the level of protection to greater than 1OO-year, by constructing parapet walls on top of existing levees and modifying constrictive bridges. A physical model study will be conducted to aid in analysis of complex design problems and will provide …

Physical Modeling Of A High Velocity Covered Urban Drainage Channel, Stephen E. Stump, Charles H. Tate, Robert U. Castle

US Army Research

The design of Oak Street Drain, a 3-mile-long rectangular open channel project in Corona, CA, requires a covered section with a sinuous alignment to avoid commercial development. The alignment includes a reverse 100-ft-radius curve and a long 200-ft-radius curve to convey the 100-year design flow of 7,100 cfs at velocities of 40 fps. A physical model was constructed to verify that the proposed design would pass the design flow without adverse hydraulic conditions.

Hydrodynamic Forces And Evolution Of A Nearshore Berm At South Padre Island, Texas, James A. Aidala, Cheryl E. Burke, T. Neil Mclellan

US Army Research

The evolution of a nearshore feeder berm was correlated to the hydrodynamic forces acting on it for periods of time during which bathymetric and hydrodynamic data sets were available. The evolution of the berm was described in the context of movement and erosion based on wave orbital velocity and bottom current. The berm was constructed and placed offshore at South Padre Island, Texas.

Removal Of Extremely Low Levels Of Munitions In A Drinking Water Supply, R. Mark Bricka, Wayne Sharp

US Army Research

Past military operations have resulted in the contamination of soils by chemical munitions such as RDX, HMX and TNT (contaminant description, page 2) . The migration of water through the soils can transport the contaminants into groundwater and contaminate drinking water sources . Many military munitions are known or suspected to be carcinogenic and, therefore, must be removed from drinking water .

Rapid Detection Of Hydrocarbon Contamination In Ground Water And Soil, A. M. Chrestman, G. D. Comes, S. S. Kooper, P. G. Malone

US Army Research

In situ fluorometry is being developed as a method for rapidly detecting and quantifying hydrocarbon contamination in ground water and soil. The results of a fluorometry survey over a site having known fuel contamination are compared to results from a soil gas survey over the same site. The fluorometry data showed three additional contaminated areas that were not detected by soil gas measurements. Soil analyses confirmed the presence of the contaminated areas.