Transformational Paradigm for Engineering and Engineering Technology Education

Transformational Paradigm for Engineering and Engineering Technology Education

Date: November 2008
Creator: Barbieri, Enrique & Fitzgibbon, William
Description: This paper discusses a transformational paradigm for engineering and engineering technology education at the baccalaureate level.
Contributing Partner: UNT College of Engineering
Direct evidence for the amorphous silicon phase in visible photoluminescent porous silicon

Direct evidence for the amorphous silicon phase in visible photoluminescent porous silicon

Date: August 3, 1992
Creator: Pérez, José M.; Villalobos, J.; McNeill, P.; Prasad, J.; Cheek, R.; Kelber, Jeffry A. et al.
Description: Article on direct evidence for the amorphous silicon phase in visible photoluminescent porous silicon.
Contributing Partner: UNT College of Arts and Sciences
Fracture Toughness Testing of Plastics under Various Environmental Conditions

Fracture Toughness Testing of Plastics under Various Environmental Conditions

Date: December 1997
Creator: Velpuri, Seshagirirao V.
Description: The primary objective of this study is to test the applicability to plastics of a fracture toughness testing tool developed for metals. The intent is to study pre-test conditioning of several plastic materials and the effect of the depth of the razor notch cut in the chevron notched fracture toughness test specimens. The study includes the careful preparation of samples followed by conditioning in various environments. Samples were subjected to laboratory air for a specific duration or to a controlled temperature-humidity condition as per the ASTM D1870. Some of the samples were subjected to vacuum conditioning under standard test specifications. Testing was conducted using the conventional three-point bend test as per ASTM D5045-95. ASTM E1304, which sets a standard for short rod and bar testing of metals and ceramics provides some basis for conducting chevron notched four-point bend tests to duplicate the toughness tool. Correlation of these results with the ASTM test samples is determined. The four-point bend test involves less specimen machining as well as time to perform the fracture toughness tests. This study of fracture toughness testing has potential for quality control as well as the fracture property determination.
Contributing Partner: UNT Libraries
Enhancing the Undergraduate Research Experience in a Senior Design Context

Enhancing the Undergraduate Research Experience in a Senior Design Context

Date: June 2010
Creator: Attarzadeh, Farrokh; Barbieri, Enrique & Ramos, Miguel
Description: This paper discusses enhancing the undergraduate research experience in a senior design context.
Contributing Partner: UNT College of Engineering
Evaluation Results of an E and ET Education Forum

Evaluation Results of an E and ET Education Forum

Date: 2011
Creator: Ramos, Miguel; Chapman, Lauren; Cannady, Mac & Barbieri, Enrique
Description: This article discusses evaluation results of an Engineering (E) and Engineering Technology (ET) education forum at the University of Houston. A central focus to these discussions revolved around whether Engineering and Engineering Technology exist as separate fields or whether there was value in thinking about them as part of a continuum.
Contributing Partner: UNT College of Engineering
The Look of Sound: Acoustic Cancellation in Architecture

The Look of Sound: Acoustic Cancellation in Architecture

Date: April 3, 2008
Creator: McCord, Cameron & Matteson, Samuel E.
Description: This paper discusses research on acoustic cancellation in architecture.
Contributing Partner: UNT Honors College
On B.S.E and B.S.ET for the Engineering Profession

On B.S.E and B.S.ET for the Engineering Profession

Date: 2010
Creator: Barbieri, Enrique; Attarzadeh, Farrokh; Pascali, Raresh; Shireen, Wajiha & Fitzgibbon, William
Description: Article discussing biological systems engineering (B.S.E.) and a proposed model for baccalaureate programs for engineering education.
Contributing Partner: UNT College of Engineering
A Study to Develop a Curriculum in Industrial Destructive Testing Procedures for Ferrous and Non-Ferrous Metals at the University Level

A Study to Develop a Curriculum in Industrial Destructive Testing Procedures for Ferrous and Non-Ferrous Metals at the University Level

Date: May 1971
Creator: Geary, Michael Robert
Description: The problem of this study was to develop a curriculum based on present destructive testing procedures used in industry dealing with the mechanical properties of ferrous and non-ferrous metals, and to organize the curriculum at the university level.
Contributing Partner: UNT Libraries
Laser Cutting Machine: Justification of initial costs

Laser Cutting Machine: Justification of initial costs

Date: May 2001
Creator: Nagaraja, Dwarakish
Description: The Industrial Laser is firmly established in metalcutting as the tool of choice for many applications. The elevator division of Montgomery KONE Inc., in an effort to move towards quality, ontime, complete deliveries and 100% customer satisfaction, decided to invest in new equipment to improve manufacturing processes. A huge investment is proposed for a laser-cutting machine. It is the responsibility of Manufacturing Engineering to direct the management by justifying its benefits, which includes payback time and financial gains. Factors such as common line cutting, automated material handling system and cutting time were involved in justification of the initial cost of a laser-cutting machine. Comparative statistics on appropriate factors accurately determine and justify the initial cost of a laser-cutting machine.
Contributing Partner: UNT Libraries
Drive Level Dependence of Advanced Piezoelectric Resonators

Drive Level Dependence of Advanced Piezoelectric Resonators

Date: August 2012
Creator: Xie, Yuan
Description: Resonators are one of the most important parts of electronic products. They provide a stable reference frequency to ensure the operation of these products. Recently, the electronic products have the trend of miniaturization, which rendered the size reduction of the resonators as well [1]. Better design of the resonators relies on a better understanding of the crystals' nonlinear behavior [2]. The nonlinearities affect the quality factor and acoustic behavior of MEMS (Micro-Electro-Mechanical-System) and nano-structured resonators and filters [3]. Among these nonlinear effects, Drivel Level Dependence (DLD), which describes the instability of the resonator frequency due to voltage level and/or power density, is an urgent problem for miniaturized resonators [2]. Langasite and GaPO4 are new promising piezoelectric material. Resonators made from these new materials have superior performance such as good frequency-temperature characteristics, and low acoustic loss [2]. In this thesis, experimental measurements of drive level dependence of langasite resonators with different configurations (plano-plano, single bevel, and double bevel) are reported. The drive level dependence of GaPO4 resonators are reported as well for the purpose of comparison. The results show that the resonator configuration affects the DLD of the langasite resonator. Experiments for DLD at elevated temperature are also performed, and it ...
Contributing Partner: UNT Libraries
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