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A Synthetic Biological Engineering Approach To Secretion- Based Recovery Of Polyhydroxyalkanoates And Other Cellular Products, Elisabeth Linton 2010 Utah State University

A Synthetic Biological Engineering Approach To Secretion- Based Recovery Of Polyhydroxyalkanoates And Other Cellular Products, Elisabeth Linton

All Graduate Theses and Dissertations

The costs associated with cellular product recovery commonly account for as much as 80% of the total production expense. As a specific example, significant recovery costs limit commercial use of polyhydroxyalkanoates (PHA), which comprise a class of microbially-accumulated polyesters. PHAs are biodegradable compounds that are of interest as a sustainable alternative to petrochemically-derived plastics. Secretion-based recovery of PHAs was studied to decrease PHA production costs. Type I and II secretory pathways are commonly used for the translocation of recombinant proteins out of the cytoplasm of E. coli. Proteins were targeted for translocation using four signal peptides (HlyA, TorA, GeneIII, and ...


Design Of Adaptive Collective Foraging In Swarm Robotic Systems, Hanyi Dai 2010 Western Michigan University

Design Of Adaptive Collective Foraging In Swarm Robotic Systems, Hanyi Dai

Dissertations

Inspired by the collective behavior observed in biological colonies, swarm robotics is a new approach to design a distributed control algorithm in order to coordinate a group of simple robots performing a complex group task. With only limited computation and communication ability of individual robots, one of the challenges in designing such multi-robotic systems is to understand the effect of individual robots behavior on the group performance. This thesis dedicates the research to designing a set of local interaction and adaptation rule for individual robots so that optimized collective foraging performance can be achieved at group level.

The research starts ...


Optimizing Green Sand Properties Of Fluidized Sand From Aeration And Developing New Green Sand Testing Technique, Ananda Mani Paudel 2010 Western Michigan University

Optimizing Green Sand Properties Of Fluidized Sand From Aeration And Developing New Green Sand Testing Technique, Ananda Mani Paudel

Dissertations

Aeration sand filling is a new molding technique in foundry. Using this technique, sand with smooth flow can be filled in any orientation and shape using low-pressure air. This is not possible by conventional gravity and high-pressure blow filling techniques. Aeration was introduced as an energy-efficient and environmentally- friendly sand molding technique. In addition, aeration has its niche on quality of molds it could produce. Friability, one of the crucial green properties for the quality mold was significantly low in aeration in comparison to the gravity and high-pressure blow filling. The fluidization action in aeration acted upon the sand clay ...


A Decision Model For Nurse-To-Patient Assignment, Ilgin Acar 2010 Western Michigan University

A Decision Model For Nurse-To-Patient Assignment, Ilgin Acar

Dissertations

A critical consequence of the current nurse shortage in the US may be an increase in the workloads on hospital nurses. Heavy workloads have been identified as a major cause of job dissatisfaction among hospital nurses and may ultimately lead to a reduction in the quality of patient care. A focus on the balancing of the workload among scheduled nurses through patient assignments can help to alleviate the chance of assigning excessive workloads to one or more nurses during a shift. Nurse-to-patient assignment, the final stage of the nurse planning was the main intention of this study. It is reasonable ...


Roundabout Perception: Review Of Standards And Guidelines For Advanced Warning, Antonio Pratelli, Reginald R. Souleyrette, C. Harding 2010 Iowa State University

Roundabout Perception: Review Of Standards And Guidelines For Advanced Warning, Antonio Pratelli, Reginald R. Souleyrette, C. Harding

Reginald R. Souleyrette

This paper deals with roundabout visibility and perception design requirements, including available standards and guidelines in the US and Europe for warning signs. To provide for the highest levels of safety, visual perception of junctions is important even where advance warning signs are provided, to reinforce driver knowledge and confidence in their actions. For roundabouts, three different types of central island development are recently suggested to affect their visual perception, and the related classification defines the reduced, the compressed and the streamlined, or slender, central island development. The paper proposes new methodologies to test this perceptibility of various roundabout designs ...


Modeling And Control Of A Wind Farm And Electrolyzer System Connected To An Electrical Gird, Dr. Adel A. Elbaset, Prof. Dr. Omar H. Abdalla 2010 Minia University

Modeling And Control Of A Wind Farm And Electrolyzer System Connected To An Electrical Gird, Dr. Adel A. Elbaset, Prof. Dr. Omar H. Abdalla

Dr. Adel A. Elbaset

This paper presents modeling and control analysis of a combined Wind-H2 system connected to an electrical grid and supplying a local electric load. The system consists of a wind farm for electricity generation and an electrolyzer to produce hydrogen for a filling station. A computer program has been developed in MATLAB for simulating the operation and control of the integrated system. Energy balances and hydrogen flow balances are calculated for each time step based on a system model and the specified control strategy. The input of this program are hourly wind speed, characteristics of wind turbine generators, hourly load demand ...


Modeling And Control Of A Wind Farm And Electrolyzer System Connected To An Electrical Gird, Adel A. Albaset, Omar H. Abdalla 2010 Minia University

Modeling And Control Of A Wind Farm And Electrolyzer System Connected To An Electrical Gird, Adel A. Albaset, Omar H. Abdalla

Omar H. Abdalla

This paper presents modeling and control analysis of a combined Wind-H2 system connected to an electrical grid and supplying a local electric load. The system consists of a wind farm for electricity generation and an electrolyzer to produce hydrogen for a filling station. A computer program has been developed in MATLAB for simulating the operation and control of the integrated system. Energy balances and hydrogen flow balances are calculated for each time step based on a system model and the specified control strategy. The input of this program are hourly wind speed, characteristics of wind turbine generators, hourly load demand ...


Secure Patient Information And Privacy In Medical Imaging, Ming Yang, Monica Trifas, Lei Chen, Lei Song, Dorothy Buenos-Aires, Jaleesa Elston 2010 Jacksonville State University

Secure Patient Information And Privacy In Medical Imaging, Ming Yang, Monica Trifas, Lei Chen, Lei Song, Dorothy Buenos-Aires, Jaleesa Elston

Lei Chen

In present times, identity protection is becoming increasingly jeopardized. Numerous ways of protecting one's personal, financial or medical information are therefore being utilized by individuals, businesses, and governments. When it comes to protecting patient information in medical images, we have developed an information hiding methodology that includes the RSA encryption algorithm and a Discrete Cosine Transform (DCT) based hiding technique. With this system, any medical image that will be electronically transferred (i.e. emailed, faxed, etc.) will have the patient's information hidden and embedded in the image outside of the Region of Interest (ROI). For example, an X-ray ...


Proceedings Of The 2009 Nrc Federal Facilities Council/James Madison University Symposium On Protecting Large Facility Complexes;, George H. Baker, Cheryl E. Wilkins 2010 James Madison University

Proceedings Of The 2009 Nrc Federal Facilities Council/James Madison University Symposium On Protecting Large Facility Complexes;, George H. Baker, Cheryl E. Wilkins

George H Baker

Large, complex facilities pose unique protection challenges involving multidisciplinary expertise and collaboration among government, academia, and the private sector. The symposium served as a forum for sharing experiences in dealing with large facility catastrophic events and risk management. The symposium was organized based on the value of interaction among different people representing diverse disciplines. In many instances, such interactions lead to solutions that would not have been developed within disciplinary stovepipes. The venue was divided into three panels addressing physical security, cyber security, and real facility case studies. We were also privileged to have three keynote speakers including Dr. Charles ...


Understanding The Scalability Of Bayesian Network Inference Using Clique Tree Growth Curves, Ole J. Mengshoel 2010 Carnegie Mellon University

Understanding The Scalability Of Bayesian Network Inference Using Clique Tree Growth Curves, Ole J. Mengshoel

Ole J Mengshoel

One of the main approaches to performing computation in Bayesian networks (BNs) is clique tree clustering and propagation. The clique tree approach consists of propagation in a clique tree compiled from a BN, and while it was introduced in the 1980s, there is still a lack of understanding of how clique tree computation time depends on variations in BN size and structure. In this article, we improve this understanding by developing an approach to characterizing clique tree growth as a function of parameters that can be computed in polynomial time from BNs, specifically: (i) the ratio of the number of ...


2010 Pacific Undergraduate Research And Creativity Conference (Purcc) Full Program, Pacific Undergraduate Research and Creativity Conference (PURCC) 2010 University of the Pacific

2010 Pacific Undergraduate Research And Creativity Conference (Purcc) Full Program, Pacific Undergraduate Research And Creativity Conference (Purcc)

Pacific Undergraduate Research and Creativity Conference (PURCC)

No abstract provided.


Six Sigma Process Simplified-Explained Through Spc And Control Limits, Raman Attri 2010 SelectedWorks

Six Sigma Process Simplified-Explained Through Spc And Control Limits, Raman Attri

Raman K. Attri

No abstract provided.


College Of Engineering Senior Design Competition Spring 2010, University of Nevada, Las Vegas 2010 University of Nevada, Las Vegas

College Of Engineering Senior Design Competition Spring 2010, University Of Nevada, Las Vegas

Senior Projects (COE)

Each student in his or her senior year chooses, plans, designs, and prototypes a product in this required element of the curriculum. The senior design project encourages the student to use everything learned in the engineering program to create a practical, real-world solution to an engineering challenge.

A highlight of the year-long senior design project is the senior design competition. This competition, which usually takes place the week before finals each semester, helps focus the senior students on increasing the quality and potential for commercial application for their design projects.

Judges from local industry evaluate the projects on innovation, commercial ...


The Department Of Engineering And Computer Science Class Of 2010 Convocation, Cedarville University 2010 Cedarville University

The Department Of Engineering And Computer Science Class Of 2010 Convocation, Cedarville University

Engineering and Computer Science Academic Celebrations

No abstract provided.


Evaluation Method For Strategic Investments, Olabode Alabi 2010 University of Nebraska at Lincoln

Evaluation Method For Strategic Investments, Olabode Alabi

Industrial and Management Systems Engineering -- Dissertations and Student Research

Real Options Analysis (ROA) has become a complimentary tool for engineering economics. It has become popular due to the limitations of conventional engineering valuation methods; specifically, the assumptions of uncertainty. Industry is seeking to quantify the value of engineering investments with uncertainty. One problem with conventional tools are that they may assume that cash flows are certain, therefore minimizing the possibility of the uncertainty of future values. Real options analysis provides a solution to this problem, but has been used sparingly by practitioners. This paper seeks to provide a new model, referred to as the Beta Distribution Real Options Pricing ...


Improved Walker Design, Meagan Foley, Kelly Johnson, Joseph Kalbach, Brittany McNally 2010 Worcester Polytechnic Institute

Improved Walker Design, Meagan Foley, Kelly Johnson, Joseph Kalbach, Brittany Mcnally

Assistive Technology Resource Center Projects

Over 41,000 people sustain injuries from falls while using a walker each year. An improved walker design that decreases the chance of falling was developed from background research and mathematical modeling of users' falls. Two improvements were embodied as universal accessories that can be attached to any standard walker. The accessories are lateral leg extensions, which temporarily extend the base of support (BOS) and a tactile and electronics guidance package, which indicates the users' location relative to the BOS. Eight volunteers evaluated and compared the prototype to a standard walker. The prototype reduced the occurrence of stepping outside the ...


An Efficient Implementation Of An Exponential Random Number Generator In A Field Programmable Gate Array (Fpga), Smitha Gautham 2010 Virginia Commonwealth University

An Efficient Implementation Of An Exponential Random Number Generator In A Field Programmable Gate Array (Fpga), Smitha Gautham

Theses and Dissertations

Many physical, biological, ecological and behavioral events occur at times and rates that are exponentially distributed. Modeling these systems requires simulators that can accurately generate a large quantity of exponentially distributed random numbers, which is a computationally intensive task. To improve the performance of these simulators, one approach is to move portions of the computationally inefficient simulation tasks from software to custom hardware implemented in Field Programmable Gate Arrays (FPGAs). In this work, we study efficient FPGA implementations of exponentially distributed random number generators to improve simulator performance. Our approach is to generate uniformly distributed random numbers using standard techniques ...


A Concise Model Of 3x7 Wire Rope Used In Cable Guardrail Systems, Cody S. Stolle 2010 University of Nebraska at Lincoln

A Concise Model Of 3x7 Wire Rope Used In Cable Guardrail Systems, Cody S. Stolle

Mechanical (and Materials) Engineering -- Dissertations, Theses, and Student Research

Wire rope is a versatile, flexible, high-strength member that is used in many mechanical systems. However, due to the complexity of wire rope, analytical investigations have been relatively limited. Previous attempts to create simplified models of wire rope were not validated with physical testing and used a cumbersome beam-and-shell or beam-and-solid method for simulating the wire rope.

An improved LS-DYNA model of 19-mm diameter 3x7 wire rope commonly used in roadside cable guardrail installations has been developed. A Belytschko-Schwer beam element was selected along with material *MAT_166. Since wire rope displays internal damping due to friction of strands and wires ...


Multiobjective Optimization Method For Identifying Modular Product Platforms And Modules That Account For Changing Needs Over Time, Patrick K. Lewis 2010 Brigham Young University - Provo

Multiobjective Optimization Method For Identifying Modular Product Platforms And Modules That Account For Changing Needs Over Time, Patrick K. Lewis

All Theses and Dissertations

Natural and predictable changes in consumer needs often require the development of new products. Providing solutions that anticipate, account for, and allow for these changes over time is a significant challenge to manufacturers and design engineers. Products that adapt to these changes through the addition of modules reduce production costs through product commonality and provide a set of products that cater to customization and adaptation. In this thesis, a multiobjective optimization design method using s-Pareto frontiers – sets of non-dominated designs from disparate design models - is developed and used to identify a set of optimal adaptive product designs that satisfy changing ...


Computer Program And Method For Detecting And Predicting Valve Failure In A Reciprocating Compressor, Ming-Chuan Leu, Jagannathan Sarangapani, Raghuram Puthall Ramesh 2010 Missouri University of Science and Technology

Computer Program And Method For Detecting And Predicting Valve Failure In A Reciprocating Compressor, Ming-Chuan Leu, Jagannathan Sarangapani, Raghuram Puthall Ramesh

Mechanical and Aerospace Engineering Faculty Research & Creative Works

Embodiments of the present invention provide a method implemented by a computer program for detecting and identifying valve failure in a reciprocating compressor and further for predicting valve failure in the compressor. Embodiments of the present invention detect and predict the valve failure using wavelet analysis, logistic regression, and neural networks. A pressure signal from the valve of the reciprocating compressor presents a non-stationary waveform from which features can be extracted using wavelet packet decomposition. The extracted features, along with temperature data for the valve, are used to train a logistic regression model to classify defective and normal operation of ...


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