Engineering Commons^™

Standard For Cold-Formed Steel Framing - Truss Design, 2004 Edition, American Iron And Steel Institute

American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)

The material contained herein has been developed by the American Iron and Steel Institute Committee on Framing Standards. The Committee has made a diligent effort to present accurate, reliable, and useful information on cold-formed steel framing design and installation. The Committee acknowledges and is grateful for the contributions of the numerous researchers, engineers, and others who have contributed to the body of knowledge on the subject. Specific references are included in the Commentary.

With anticipated improvements in understanding of the behavior of cold-formed steel framing and the continuing development of new technology, this material may eventually become dated. It is …

Stormwater Utility Fees: Considerations & Options For Interlocal Stormwater Working Group (Iswg), New England Environmental Finance Center

Water

Stormwater utilities are a concept whose time seems to have arrived. Established by relatively few communities in the 1970s as a method of funding flood control measures, stormwater utilities now exist in over 400 municipalities and counties throughout the United States. During the next 10 years, their numbers are expected to swell dramatically – by one estimate to over 2,000 by the year 2014.

The reasons for this growth are multifold. Federal stormwater regulations passed in the 1980s (Phase I of the National Pollutant Discharge Elimination System Program, or NPDES), motivated many larger communities to seek alternative funding sources and …

Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, Volume 21, Number 8, May 2005, College Of Engineering And Computer Science, Wright State University

BITs and PCs Newsletter

An eight page newsletter created by the Wright State University College of Engineering and Computer Science that addresses the current affairs of the college.

Development Of A Linear Control Model For A Camless Valvetrain, Domenic R. Albert

Electronic Dissertations and Theses

The disciplines of mechanical and electrical engineering have been merging slowly over the last few decades. More specifically, the automotive industry has reaped the benefits of using electronics to improve upon the economics and ergonomics of business well as product. Although electronic systems have proved to be useful throughout consumer vehicles, the engine is arguably the area that benefits the most. Essentially, efficiency and power output of an internal combustion engine can be improved by optimizing the airflow of the cylinders. Since this airflow is controlled by the valve train, their manipulation affects the overall performance of an engine. Additionally, …

New Algorithms For Statistical Analysis Of Interval Data, Gang Xiang, Scott A. Starks, Vladik Kreinovich, Luc Longpre

Departmental Technical Reports (CS)

It is known that in general, statistical analysis of interval data is an NP-hard problem: even computing the variance of interval data is, in general, NP-hard. Until now, only one case was known for which a feasible algorithm can compute the variance of interval data: the case when all the measurements are accurate enough -- so that even after the measurement, we can distinguish between different measured values Xi. In this paper, we describe several new cases in which feasible algorithms are possible -- e.g., the case when all the measurements are done by using the same (not necessarily very …

Determination Of Surface And Thickness Characteristics Of Textured Geomembranes Using Image Analysis, Nazli Yesiller, Arif Cekic

Civil and Environmental Engineering

Image analysis was used to determine surface topography and thickness of textured geomembranes. Images of cross sections (specimen length × thickness) of geomembranes were obtained at 50× magnification using a digital optical microscope. Thickness was determined as the distance between the top and bottom surfaces along an entire cross section. For surface analysis, profiles of top and bottom surfaces were extracted from the cross section images. Amplitude, spatial, hybrid, and functional texture parameters were determined. Tests were conducted on eleven samples of HDPE and LLDPE geomembranes manufactured by co-extrusion and embossing at varying thicknesses. The geomembranes were classified into three …

Ronan Point Apartment Tower Collapse And Its Effect On Building Codes, Cynthia Pearson, Norbert Delatte

Civil and Environmental Engineering Faculty Publications

In the early morning hours of May 16, 1968, the occupant of apartment 90 on the 18th floor of the 22-story Ronan Point apartment tower, in London, lit a match to brew her morning cup of tea. The resulting gas explosion initiated a partial collapse of the structure that killed four people and injured 17 (one of whom subsequently died). On investigation, the apartment tower was found to be deeply flawed in both design and construction. The existing building codes were found to be inadequate for ensuring the safety and integrity of high-rise precast concrete apartment buildings. The Larsen–Nielson building …

Minimum Velocities For The Suspension Of Fine Sediment In The Green River Canal, Michael W. Stoeber

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

This paper focuses on a canal in the Gunnison Valley, located in central Utah, which diverts water from the sediment-laden Green River. Grain size analyses were performed on sediment samples taken from the canal. These grain size analyses were used to determine the grain size distribution of the fine sediment, classify the fine sediment, and compare the fine sediment to a sediment deposit in the Green River. The critical incipient velocity for the D₅₀ and D₁₀₀ and the critical grain entrainment velocity corresponding to the D₉₅ were determined through flume experimentation. Two methods, developed by prior researchers, …

Studies On Novel Semiconductor Detectors And Front-End Electronics For Heavy Flavor Decay Studies, Gustavo Kertzscher

Renée Crown University Honors Thesis Projects - All

I have studied novel semiconductor detectors designed to provide precise space point information of the trajectory of charged subatomic particles produced in high energy physics (HEP) collisions. The technological thrust aims toward maintaining good performance of these detectors in a hard radiation environment for an extended period of time. My studies approached two different types of silicon devices: a whole wafer comprised of test structures and pixel devices designed for the inner vertex detector of the BTeV experiment, and small test structures of a novel type of quasi-3D detectors developed in the context of the CERN RD50 collaboration. This collaboration …

Design, Development, Test, And Calibration Of The Floating Potential Measurement Unit Sensor Suite, Chad Fish

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

To provide in-situ plasma diagnostic ability aboard the International Space Station, NASA-Johnson procured the Floating Potential Measurement Unit (FPMU) from Utah State University - Space Dynamics Laboratory in September 2001. The FPMU sensor suite is comprised of a Floating Potential Probe, two sweeping Langmuir Probes, and a Radio Frequency Probe. The FPMU is to be operational for a period of at least three years to cover the major construction phase of the International Space Station. The FPMU will make measurements of ISS floating potential as well as plasma density and temperature, which are the primary environmental factors that effect ISS …

Hide It Or Unbundle It: A Comparison Of The Antitrust Investigations Against Microsoft In The U.S. And The E.U., Sue Ann Mota

The University of New Hampshire Law Review

[Excerpt] "Microsoft Corporation, the world’s largest software company, has been facing antitrust scrutiny globally. In the U.S., after what’s been called the antitrust trial of the century, a consent decree was reached between Microsoft, the United States government, and several states, that closely resembled the litigated remedy that the remaining states received. Only Massachusetts appealed the litigated remedy, which was approved by the appeals court on June 30, 2004. In the United States, Microsoft was required to hide, but not remove, the Internet Explorer browser on the Windows Operating System. While antitrust litigation was ongoing in the United States against …

Validating Surface Energy Balance Fluxes Derived From Airborne Remote Sensing, José Luis Chávez Egüez

Biological Engineering

Remote sensing-derived energy balance components were compared against measured eddy covariance energy balance terms using heat flux source area models to validate the airborne multispectral remote sensing procedure in the estimation of instantaneous and daily evapotranspiration rates.

A procedure was developed to generate raster layers of the footprint weights for weighting/integrating the different components of the energy balance model and obtain meaningful comparisons to similar energy balance terms measured at eddy covariance and/or Bowen ratio stations.

Soil heat flux and surface aerodynamic temperature models were studied in an effort to improve the remote sensing estimation of distributed evapotranspiration rates. Aerial …

A Case Study On Implementation Of Quality Function Deployment Into The Design Process Of A Small Job Shop, Benjamin A. Thomson

All-Inclusive List of Electronic Theses and Dissertations

The majority of research involving Quality Function Deployment (QFD) was focused on large consumer based companies and not small job shop business-to-business companies. This case study involved the implementation of QFD into the design process at Reynolds & Co., a small job shop in Terre Haute, IN. The specific objectives of the research were to find the QFD concepts that apply to the improvement of Reynolds & Co.'s (small job shop) design process. The next objective was to reduce the average design time associated with Reynolds & Co.'s design process. The final objective of this case study was to reduce …

Changing To A Student-Centred Paradigm: The Why, What And How, Mike Murphy

Presentations

No abstract provided.

Derivation Of A Numerical Method For Computing 3-D Magnetoplasmadynamic Flows In Thermodynamic Non-Equilibrium, Caroline CéCile Marcelle Liron

Master's Theses - Daytona Beach

Various models exist for the propulsion concept using magnetohydrodynamics (MHD). Various authors, such as Powell, Canupp, Candler, and MacCormack have dealt with issues of solving the magnetic field induction equations simultaneously with Navier-Stokes equations using Computational Fluid Dynamics (CFD). Although most authors deal with species non-equilibrium and thermal non-equilibrium, a new emphasis is set to study the impact of electrons with the electron energy and the electronic excitation energy, as well as a complex energy non-equilibrium.

This thesis presents the derivation of a numerical method for computing 3-D MHD flows for the purpose of modeling steady-state magnetoplasma …

Acuta Enews May 2005, Vol. 34, No. 5

ACUTA Newsletters

ln This lssue

Board Approves Slate of Nominees

From ACUTA Headquarters...................... Jeri A. Semer, CAE, ACUTA Executive Director

Tech Talk: Proxy Appliances Are Network Rules Enforcers................. Kevin Tanzillo, Dux PR

Nominate Now for ACUTA Ruth A. Michalecki Leadership Award

Volunteer at Annual Conference

Dues Notices to Mail May 2

Board Report...................... Carmine Piscopo, Providence College

Regional Workshop: Strategic Trade-offs in Campus Wireless Mobility

DC Update.................... Whitney Johnson, Retired, No. Michigan Univ.

Canadian Commission Says VoIP Must Have 911 Emergency Service

Welcome New Members

Web Tip: Listserv & Resource Library...................... Aaron Fuehrer, ACUTA Computer Services Mgr.

ACUTA Online Press Room

Modeling Of Immunoglobulin Uptake By N,N,N′,N′-Ethylenediaminetetramethylenephosphonic Acid-Modified Zirconia Particles Under Static And Dynamic Conditions, Sabyasachi Sarkar, Anuradha Subramanian

Papers in Biotechnology

A matrix developed from N,N,N′,N′-ethylenediaminetetramethylenephosphonic acid-modified zirconia beads (further referred to as r_PEZ); 25–38 μm in diameter and with a pore size of 22 ± 3 nm, was utilized for the separation of immunoglobulins (Igs). r_PEZ has been shown to bind to various Igs originating from a wide variety of species. To understand the mechanisms controlling the uptake of Igs by r_PEZ, static protein uptake experiments were carried out. The protein uptake profiles were further modeled with a kinetic rate constant model. Individual studies were undertaken for human immunoglobulin A, G and M (HIgA, HIgG and HIgM). The kinetic rate …

Permeability Of Corn, Soybeans, And Soft Red And White Winter Wheat As Affected By Bulk Density, Michael D. Montross, Samuel G. Mcneill

Biosystems and Agricultural Engineering Faculty Publications

Darcy’s law is a function of viscosity, permeability, and velocity and can be used to predict the airflow resistance in granular materials at low air velocities. Permeability also governs the magnitude of natural convection currents during periods of non-aerated grain storage. The permeability of corn, soybeans, soft white winter wheat, and soft red winter wheat were measured as a function of bulk density and moisture content. Air was passed through a column of grain and the flow rate and pressure drop measured. Bulk density and kernel density were also measured to determine the porosity of grain in the test column. …

Airflow Resistance Of Seeds At Different Bulk Densities Using Ergun's Equation, Marek Molenda, Michael D. Montross, Samuel G. Mcneill, Jozef Horabik

Biosystems and Agricultural Engineering Faculty Publications

Airflow resistance of grains and oilseeds has been extensively studied. Traditionally the data has been presented using Shedd’s curves. However, this assumes that airflow resistance is independent of grain depth. Grain undergoes compaction during storage that changes the bulk density, porosity, and therefore the airflow resistance. Ergun’s equation is a function of particle size and porosity of the granular material. Airflow resistance by Ergun’s equation was used to predict the pressure drop across a column of corn, soft white winter wheat, soft red winter wheat, and soybeans at three moisture content levels and two bulk densities. The maximum root mean …

Crop Yield Response To Precision Deep Tillage, Larry G. Wells, Timothy S. Stombaugh, Scott A. Shearer

Biosystems and Agricultural Engineering Faculty Publications

Experimental precision deep tillage was applied at three sites in central Kentucky with relatively well-drained silt loam soils in no-till crop production. Fields were divided into 0.4 ha (1 ac) grid cells using DGPS mapping. Assessment of soil compaction by machinery traffic was made using multiple soil cone penetrometer measurements and expressed as cone index (CI). Corn, wheat, and soybean yields were depressed in grid cells with CI_avg ≥ 1.5 MPa (218 psi) prior to application of tillage treatments at sites 1 and 3, whereas at site 2, where most of the highest average CI values ranged from 1.44 …

Effect Of Fat And Casein Particles In Milk On The Scattering Of Elliptically Polarized Light, Czarena L. Crofcheck, Jeremie Wade, Janakiraman N. Swamy, Mustafa M. Aslan, M. Pinar Mengüç

Biosystems and Agricultural Engineering Faculty Publications

In this article, we present an experimental approach to determine the milk fat content using scattered light intensity profiles. The elements of the scattering (Mueller) matrix have been shown to provide valuable information about variation of the optical properties of scattering particles. The scattering behavior of fat and casein in terms of the scattering matrix elements was experimentally determined for milk with varying fat levels ranging from 0.05 wt% (skim) to 3.20 wt% (whole). Three of the scattering Mueller matrix elements, specifically S₁₁, S₁₂/S₁₁, and S₃₃/S₁₁, were found to be …

Failure Of Cold-Formed Steel Beams During Concrete Placement, Norbert Delatte

Civil and Environmental Engineering Faculty Publications

During a concrete placement on the second story of a building under construction, the supporting cold-formed steel beams collapsed. Four workers were injured. The collapse occurred while concrete was being placed onto steel decking on the second floor of the structure. Cold-formed steel beams, without shoring, supported the steel decking. Analysis of the steel beams under the weight of concrete and workers using the applicable American Concrete Institute and American Iron and Steel Institute documents indicated that the beams were overstressed for construction loads. After the collapse, part of the structure was rebuilt using thicker beams. For the reconstruction, the …

Distributed Control Of Hybrid Motor Drives, Shuai Lu, Keith Corzine, T. H. Fikse

Electrical and Computer Engineering Faculty Research & Creative Works

No abstract provided.

Prevention Of Atrophic Nonunion Development By Recombinant Human Bone Morphogenetic Protein-7, Takeshi Makino, David J. Hak, Scott Hazelwood, Shane Curtiss, A. Hari Reddi

Biomedical Engineering

Severe periosteal and soft tissue disruption at the time of fracture may result in the formation of an atrophic nonunion. We have developed a reproducible atrophic nonunion in an animal model. The purpose of this study was to evaluate whether the immediate application of recombinant human BMP-7 to the fracture site could rescue the healing process in this nonunion model. A total of 56 three month old Fisher 344 rats were utilized. A 1.25mm diameter K-wire was inserted into the femur in a retrograde fashion, and a mid-diaphyseal closed transverse fracture was created using a standard three point bending device. …

Development Of Kentucky’S Highway Incident Management Strategic Plan, Monica L. Barrett, Joseph D. Crabtree, Jerry G. Pigman, Jennifer R. Walton

Kentucky Transportation Center Research Report

Even though Kentucky has undertaken many initiatives to improve specific aspects of incident management, there has never been a plan that establishes an overall framework for a systematic, statewide, multi-agency effort to improve the management of highway incidents. The objective of this project was to develop a strategic plan that provides a vision and strategy for significantly improving all aspects of incident management. This report identifies the current and best practices for highway incident management in the United States and in Kentucky and establishes a vision for the future of highway incident management in Kentucky. The Plan developed through the …

Nanocharacterization Of Bio-Silica Using Atomic Force And Ultrasonic Force Microscopy, Vinaypreet S. Gill, Kevin P. Hallinan, N. S. Brar

Mechanical and Aerospace Engineering Faculty Publications

Nanotechnology has become central to our research efforts to fabricate relatively smaller size devices, which are more versatile than their older and larger predecessors. Silica is a very important material in this regard. Recently, a new biomimetically inspired path to silica production has been demonstrated. This processing technique was inspired from biological organisms, such as marine diatoms, which produce silica at ambient conditions and almost neutral ph with beautiful control over location and structure. Recently, several researchers have demonstrated that positional control of silica formed could be achieved by application of an electric field to locate charged enzymes responsible for …

Friction And Adhesion In Rigid Surface Indentation Of Nitrile Rubber, Stephen Jerrams

Articles

When a rigid body in the form of a plane strain indentor is forced into an elastomer, the asperities on the surface of the indentor are filled by the softer material. As depth of ingress increases, the rubber displaced into the indentor asperities exhibits stick-slip behaviour. The rubber adheres to the rigid body and if the depth of ingress is held at a maximum, the level of adhesion remains constant despite short-term load relaxation occurring in the rubber.

This text describes the influence of a range of factors on indentation forces and adhesion in rigid indentation of hydrogenated nitrile rubbers. …

Evaluation Of Auto Incident Recording System (Airs), Eric R. Green, Kenneth R. Agent, Jerry G. Pigman

Kentucky Transportation Center Research Report

The Auto Incident Recording System (AIRS) is a sound-actuated video recording system. It automatically records potential incidents when activated by sound (horns, clashing metal, squealing tires, etc.). The purpose is to detect patterns of crashes at intersections for use in implementing relevant improvements. Videos of incidents and near-incidents were obtained after AIRS was placed in service at an intersection in Louisville, Kentucky on July 22, 2001. Crash reports were obtained from January 1998 through September, 2004 to; a) compare to the available data from AIRS videos, and b) compare the crashes before and after various improvements were made. A traffic …

Speed Estimation For Air Quality Analysis, Mei Chen, Huafeng Gong

Kentucky Transportation Center Research Report

Average speed is an essential input to the air quality analysis model MOBILE6 for emission factor calculation. Traditionally, speed is obtained from travel demand models. However, such models are not usually calibrated to speeds. Furthermore, for rural areas where such models are not available, there has not been a reliable method for estimating speed.

In this study, a procedure was developed based on the Highway Economic Requirement System (HERS) speed model to estimate average speed using as input various data such as roadway characteristics and traffic conditions. This procedure was coded in MS Excel macro and can be attached to …

Kentucky’S Highway Incident Management Strategic Plan, Monica L. Barrett, Joseph D. Crabtree, Jerry G. Pigman, Jennifer R. Walton

Kentucky Transportation Center Research Report

Kentucky ’s Highway Incident Management Strategic Plan consists of a mission statement, 4 goals, 16 objectives, and 49 action strategies. The action strategies are arranged by priority and recommended time frame for implementation. When implemented, the action strategies will help Kentucky achieve its primary goals for incident management: 1) improved safety of responders, highway workers, and motorists; 2) reduced traffic delay; 3) improved motorist awareness; and 4) improved responder and highway worker preparedness.