Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Cartilage (2)
- Alloys (1)
- Asynchronous learning (1)
- Autonomy support (1)
- Bioreactor (1)
-
- Bondability (1)
- Collagen (1)
- Experiments (1)
- Finite element analysis (1)
- Fluid Mechanics (1)
- Glycosaminoglycans (1)
- Growth (1)
- Laboratory (1)
- Lifelong learning (1)
- Mixture (1)
- Multiple-response process; solder paste stencil printing process; Mahalonobis distance; desirability function; Taguchi method (1)
- Organic substrate (1)
- Permeation (1)
- Podcast (1)
- Reliability (1)
- Remodeling (1)
- Self-directed learning (1)
- Social interactions (1)
- Soldering (1)
- Solders (1)
- Student autonomy (1)
- Symmetric and asymmetric tolerance design; Taguchi's quadratic loss function; inverted normal loss function; revised inverted normal loss function (1)
- Thermal properties of materials (1)
- Ultrasonic frequency (1)
- Viscoelastic (1)
Articles 1 - 18 of 18
Full-Text Articles in Engineering
Enhanced Vehicle Identification Utilizing Sensor Fusion And Statistical Algorithms, Stephane Roussel, Hemanth Porumamilla, Charles Birdsong, Peter Schuster, Christopher Clark
Enhanced Vehicle Identification Utilizing Sensor Fusion And Statistical Algorithms, Stephane Roussel, Hemanth Porumamilla, Charles Birdsong, Peter Schuster, Christopher Clark
Mechanical Engineering
Several studies in the area of vehicle detection and identification involve the use of probabilistic analysis and sensor fusion. While several sensors utilized for identifying vehicle presence and proximity have been researched, their effectiveness in identifying vehicle types has remained inadequate. This study presents the utilization of an ultrasonic sensor coupled with a magnetic sensor and the development of statistical algorithms to overcome this limitation. Mathematical models of both the ultrasonic and magnetic sensors were constructed to first understand the intrinsic characteristics of the individual sensors and also to provide a means of simulating the performance of the combined sensor …
Work In Progress - Role Of Faculty In Promoting Lifelong Learning, Jonathon Stolk, Susan M. Lord, Candice Stefanou, John Chen, Katharyn E. K. Nottis, Michael J. Prince
Work In Progress - Role Of Faculty In Promoting Lifelong Learning, Jonathon Stolk, Susan M. Lord, Candice Stefanou, John Chen, Katharyn E. K. Nottis, Michael J. Prince
Mechanical Engineering
Students’ development of self-directed and lifelong learning capacities is vital for their success in today’s engineering environment. Instructors play a critical role in influencing outcomes related to self-directed learning (SDL) through their design of courses that support students’ transitions from controlled to autonomous learning behaviors. Yet there is a critical lack of research examining how instructor choices promote self-directed (and eventually lifelong) learning development in undergraduate engineering students. In this work in progress, we introduce a project that explores how instructor choices affect a range of student outcomes related to their development as self-directed and lifelong learners. Drawing on existing …
A Nonlinear Constituent Based Viscoelastic Model For Articular Cartilage And Analysis Of Tissue Remodeling Due To Altered Glycosaminoglycan-Collagen Interactions, Gregory C. Thomas, Anna Asanbaeva, Pasquale Vena, Robert L. Sah, Stephen M. Klisch
A Nonlinear Constituent Based Viscoelastic Model For Articular Cartilage And Analysis Of Tissue Remodeling Due To Altered Glycosaminoglycan-Collagen Interactions, Gregory C. Thomas, Anna Asanbaeva, Pasquale Vena, Robert L. Sah, Stephen M. Klisch
Mechanical Engineering
A constituent based nonlinear viscoelastic (VE) model was modified from a previous study (Vena, et al., 2006, “A Constituent-Based Model for the Nonlinear Viscoelastic Behavior of Ligaments,” J. Biomech. Eng., 128, pp. 449–457) to incorporate a glycosaminoglycan (GAG)-collagen (COL) stress balance using compressible elastic stress constitutive equations specific to articular cartilage (AC). For uniaxial loading of a mixture of quasilinear VE constituents, time constant and relaxation ratio equations are derived to highlight how a mixture of constituents with distinct quasilinear VE properties is one mechanism that produces a nonlinear VE tissue. Uniaxial tension experiments were performed with newborn bovine AC …
Drop Impact Reliability Of Edge-Bonded Lead-Free Chip Scale Packages, Andrew Farris, Jianbiao Pan, Albert Liddicoat, Michael Krist, Nicholas Vickers, Brian J. Toleno, Dan Maslyk, Dongkai Shangguan, Jasbir Bath, Dennis Willie, David A. Geiger
Drop Impact Reliability Of Edge-Bonded Lead-Free Chip Scale Packages, Andrew Farris, Jianbiao Pan, Albert Liddicoat, Michael Krist, Nicholas Vickers, Brian J. Toleno, Dan Maslyk, Dongkai Shangguan, Jasbir Bath, Dennis Willie, David A. Geiger
Industrial and Manufacturing Engineering
This paper presents the drop test reliability results for edge-bonded 0.5 mm pitch lead-free chip scale packages (CSPs) on a standard JEDEC drop reliability test board. The test boards were subjected to drop tests at several impact pulses, including a peak acceleration of 900 Gs with a pulse duration of 0.7 ms, a peak acceleration of 1500 Gs with a pulse duration of 0.5 ms, and a peak acceleration of 2900 Gs with a pulse duration of 0.3 ms. A high-speed dynamic resistance measurement system was used to monitor the failure of the solder joints. Two edge-bond materials used in …
Development Of A Reusable Aerospike Nozzle For Hybrid Rocket Motors, Patrick Lemieux
Development Of A Reusable Aerospike Nozzle For Hybrid Rocket Motors, Patrick Lemieux
Mechanical Engineering
The Department of Mechanical Engineering at the California Polytechnic State University, San Luis Obispo, has developed an innovative program of experimental research and development on hybrid rocket motors (where the fuel and the oxidizer are in different phases prior to combustion). One project currently underway involves the development of aerospike nozzles for such motors. These nozzles, however, are even more susceptible to throat ablation than regular converging-diverging nozzles, due the nature of their flow expansion mechanism. This paper presents the result of a recent development project focused on reducing throat ablation in hybrid rocket motor nozzles. Although the method is …
Dynamics Simulation And Malfunction Diagnosis Of Heavy Machinery Using Msc Adams, Dewen Kong, Jim M. Meagher, Xi Wu
Dynamics Simulation And Malfunction Diagnosis Of Heavy Machinery Using Msc Adams, Dewen Kong, Jim M. Meagher, Xi Wu
Mechanical Engineering
No abstract provided.
Integrating Adams Software Into An Upper Division Mechanical Design And Analysis Course, Xi Wu, Dewen Kong, Jim Meagher
Integrating Adams Software Into An Upper Division Mechanical Design And Analysis Course, Xi Wu, Dewen Kong, Jim Meagher
Mechanical Engineering
No abstract provided.
Simulating The Growth Of Articular Cartilage Explants In A Permeation Bioreactor To Aid In Experimental Protocol Design, Timothy P. Ficklin, Andrew Davol, Stephen M. Klisch
Simulating The Growth Of Articular Cartilage Explants In A Permeation Bioreactor To Aid In Experimental Protocol Design, Timothy P. Ficklin, Andrew Davol, Stephen M. Klisch
Mechanical Engineering
Recently a cartilage growth finite element model (CGFEM) was developed to solve nonhomogeneous and time-dependent growth boundary-value problems (Davol et al., 2008, “A Nonlinear Finite Element Model of Cartilage Growth,” Biomech. Model. Mechanobiol., 7, pp. 295–307). The CGFEM allows distinct stress constitutive equations and growth laws for the major components of the solid matrix, collagens and proteoglycans. The objective of the current work was to simulate in vitro growth of articular cartilage explants in a steady-state permeation bioreactor in order to obtain results that aid experimental design. The steady-state permeation protocol induces different types of mechanical stimuli. When the specimen …
Teaming Multi-Level Classes On Industry Projects, Lizabeth Schlemer, Jose Macedo
Teaming Multi-Level Classes On Industry Projects, Lizabeth Schlemer, Jose Macedo
Industrial and Manufacturing Engineering
For the past few years we experimented with teaming students from a sophomore-level class and a senior-level class to work on industry projects. The classes are “work design” and “facilities design.” Projects are selected to require the application of knowledge from both disciplines. In addition, the projects are selected from small local companies. The intent of this paper is to describe the benefits and difficulties associated with this methodology. While specific classes in this experience are typical of an industrial engineering curriculum, the lessons learned and benefits could translate to other disciplines.
Use Of Ultrasonic Sensors In The Development Of An Electronic Travel Aid, Chris Gearhart, Alex Herold, Brian Self, Charles Birdsong, Lynne Slivovsky
Use Of Ultrasonic Sensors In The Development Of An Electronic Travel Aid, Chris Gearhart, Alex Herold, Brian Self, Charles Birdsong, Lynne Slivovsky
Mechanical Engineering
Ultrasonic sensors present one of the most cost-effective digital distance measurement systems available for mobile applications. Their effectiveness is limited, however, in applications involving complex environments and when information on sensor position is unavailable. This paper focuses on the implementation and limitations of ultrasonic sensors and system design considerations during development of an Electronic Travel Aid [ETA] for the visually impaired utilizing ultrasonic sensors and vibrotactile feedback. Our work with sensors included signal filtering and triangulation to improve performance characteristics of ultrasonic-based measurements. Additionally, we describe the use of computer modeling to aid in the design of ultrasonic sensor systems.
Undergraduate Engineers Develop Hydraulic Servo Control Systems Using Model-Based Design With Simulink, Charles Birdsong
Undergraduate Engineers Develop Hydraulic Servo Control Systems Using Model-Based Design With Simulink, Charles Birdsong
Mechanical Engineering
In the past, control engineering was the exclusive province of computer and electrical engineers with advanced degrees and years of experience in low-level programming languages. Today, engineers and students alike can use Model-Based Design to rapidly design and implement real-time control systems without having to learn low-level programming. Used throughout the automotive and aerospace industries, Model-Based Design places a high-level system model at the center of development. This approach helps engineering students understand not only the basic physics of system components, but also the interaction between components and the behavior of the overall system.
Optimization Of Engineering Tolerance Design Using Revised Loss Functions, Jeh-Nan Pan, Jianbiao Pan
Optimization Of Engineering Tolerance Design Using Revised Loss Functions, Jeh-Nan Pan, Jianbiao Pan
Industrial and Manufacturing Engineering
Engineering tolerance design plays an important role in modern manufacturing. Both symmetric and asymmetric tolerances are common in many manufacturing processes. Recently, various revised loss functions have been proposed for overcoming the drawbacks of Taguchi's loss function. In this article, Kapur's economic tolerance design model is modified and the economic specification limits for both symmetric and asymmetric losses are established. Three different loss functions are compared in the optimal symmetric and asymmetric tolerance design: a revised Taguchi quadratic loss function, an inverted normal loss function and a revised inverted normal loss function. The relationships among the three loss functions and …
Me 347 Fluid Mechanics Lab Experiments, 7th Edition
Me 347 Fluid Mechanics Lab Experiments, 7th Edition
Mechanical Engineering Lab Manuals
Welcome to the documentation used to describe and conduct ten fluid mechanics experiments that are located in the Fluid Mechanics Laboratory in Building 192, Room 102, at Cal Poly State University. All of the experiments are designed to illustrate many of the concepts presented in undergraduate fluid mechanics classes. The first objective of each lab is to give students hands-on experience with fluid mechanics experiments. This includes working with standard facilities and instrumentation found in fluid mechanics laboratories. The second objective of each lab is to learn how to use experimentally collected data to either validate an analytical model for …
The Effectiveness Of Asynchronous Podcasting Of Classes, John Chen
The Effectiveness Of Asynchronous Podcasting Of Classes, John Chen
Mechanical Engineering
In this study we examine in some detail the effectiveness of enhanced podcasting compared with traditional face-to-face class meeting. Enhanced podcasting goes beyond simply recording the audio portion of a lecture. It may include the video footage from the class meeting or, as in our case, the presented material (including each written pen stroke) exactly as seen by students sitting in the classroom with the instructor. The course we studied is Applied Thermodynamics, a junior-level course for mechanical engineering students. For this study we had access to three sections of the course, all taught by the same faculty member. For …
Transient Refrigerant Migration And Oil Distribution Of An R134a Automotive A/C System, Steffen Peuker, P. S. Hrnjak
Transient Refrigerant Migration And Oil Distribution Of An R134a Automotive A/C System, Steffen Peuker, P. S. Hrnjak
Mechanical Engineering
Automotive fixed orifice tube (FOT) systems are especially prone to cycling losses due to their clutch cycling operation. Therefore, it is important to better understand the dynamics of the refrigerant and oil migration during transient events such as cycling and start-up. To measure the refrigerant mass and oil distribution of an automotive R134a FOT breadboard system, two ball valves around each component are added. By simultaneously closing the valves, the refrigerant and oil is trapped in different sections of the system and can be measured. The transient refrigerant migration during a stop-start transient as well as the refrigerant mass distribution …
Finding And Optimising The Key Factors For The Multiple-Response Manufacturing Process, Jeh-Nan Pan, Jianbiao Pan, Chun-Yi Lee
Finding And Optimising The Key Factors For The Multiple-Response Manufacturing Process, Jeh-Nan Pan, Jianbiao Pan, Chun-Yi Lee
Industrial and Manufacturing Engineering
With the advent of modern technology, manufacturing processes became so sophisticated that a single quality characteristic cannot reflect the true product quality. Thus, it is essential to perform the key factor analysis for the manufacturing process with multiple-input (factors) and multiple-output (responses). In this paper, an integrated approach of using the desirability function in conjunction with the Mahalanobis-Taguchi-Gram Schmit (MTGS) system is proposed in order to find and optimise the key factors for a multiple-response manufacturing process. The aim of using the MTGS method is to standardise and orthogonalise the multiple responses so that the Mahalanobis distance for each run …
Effects Of Reflow Profile And Thermal Conditioning On Intermetallic Compound Thickness For Snagcu Soldered Joints, Jianbiao Pan, Tzu-Chien Chou, Jasbir Bath, Dennis Willie, Brian J. Toleno
Effects Of Reflow Profile And Thermal Conditioning On Intermetallic Compound Thickness For Snagcu Soldered Joints, Jianbiao Pan, Tzu-Chien Chou, Jasbir Bath, Dennis Willie, Brian J. Toleno
Industrial and Manufacturing Engineering
Purpose – The purpose of this paper is to investigate the effects of reflow time, reflow peak temperature, thermal shock and thermal aging on the intermetallic compound (IMC) thickness for Sn3.0Ag0.5Cu (SAC305) soldered joints.
Design/methodology/approach – A four-factor factorial design with three replications is selected in the experiment. The input variables are the peak temperature, the duration of time above solder liquidus temperature (TAL), solder alloy and thermal shock. The peak temperature has three levels, 12, 22 and 32°C above solder liquidus temperatures (or 230, 240 and 250°C for SAC305 and 195, 205, and 215°C for SnPb). The TAL has …
The Effect Of Ultrasonic Frequency On Gold Wire Bondability And Reliability, Jianbiao Pan, Minh-Nhat Le, Cuong Van Pham
The Effect Of Ultrasonic Frequency On Gold Wire Bondability And Reliability, Jianbiao Pan, Minh-Nhat Le, Cuong Van Pham
Industrial and Manufacturing Engineering
This paper presents a systematic study on the effect of 120 KHz ultrasonic frequency on the bondability and reliability of fine pitch gold wire bonding to pads over an organic substrate with gold metallizations. The study was carried out on a thermosonic ball bonder that is allowed to easily switch between ultrasonic frequencies of 60 KHz and 120 KHz by changing the ultrasonic transducer and the ultrasonic generator. Bonding parameters were optimized through the design of experimental methodology for four different cases: 25.4 mm wire at 60 kHz, 25.4 mm wire at 120 kHz, 17.8 mm wire at 60 kHz, …