Engineering Commons^™

Novel Test Fixture For Characterizing Mems Switch Microcontact Reliability And Performance, Protap Mahanta, Farhana Anwar, Ronald A. Coutu Jr.

Electrical and Computer Engineering Faculty Research and Publications

In microelectromechanical systems (MEMS) switches, the microcontact is crucial in determining reliability and performance. In the past, actual MEMS devices and atomic force microscopes (AFM)/scanning probe microscopes (SPM)/nanoindentation-based test fixtures have been used to collect relevant microcontact data. In this work, we designed a unique microcontact support structure for improved post-mortem analysis. The effects of contact closure timing on various switching conditions (e.g., cold-switching and hot-switching) was investigated with respect to the test signal. Mechanical contact closing time was found to be approximately 1 us for the contact force ranging from 10–900 μN. On the other hand, for the 1 …

1885 - Royal Commission On Water Supply Irrigation In Western America, First Progress Report. A. Deakin

Related Research and Documents

A report prepared for the members of the Australian Royal Commission on Water Supply concerning irrigation in Western America as it related to water supply conditions in Australia, including a discussion of the historic irrigation practices on the North America continent, extent of irrigation in the West and various irrigation laws.

The Scientific Information Exchange General Model At Digital Library Context: Internet Of Things, Nayere Soleimanzade, Asefeh Asemi, Mozafar Cheshmehsohrabi, Ahmad Shabani

Library Philosophy and Practice (e-journal)

Introduction: This paper aims to develop a Scientific Information Exchange General Model at Digital Library in Context of Internet of things, which would enable automated and efficient library services. To accomplish its objective, the main classes (Concepts), sub-classes, attributes are identified in order to introduce an appropriate model.

Methodology: The approach of this study is basic, exploratory, and developmental and is run through a mixed method consisting of documentary, Delphi, and data modeling methods. The study population in the documentary section includes the study of information resources retrieved in related subjects. The study population in the Delphi section is …

An Experimental Study Of Fractional Wettability Effects On Gas Assisted Gravity Drainage (Gagd), Abdullah Abdulrahman A. Al-Tameemi

LSU Master's Theses

Utilizing the power of nature to solve engineering problems has been a time-honored tradition, for example, using the sunlight as a heat and light source. From this principle, the visionary idea of Gas Assisted Gravity Drainage (GAGD) came. The GAGD process utilizes the natural segregation phenomenon of fluids with different densities in order to produce oil efficiently and economically. Waterflooding processes typically do not recover more than 40% of the original oil in place (OOIP), leaving a vast amount of oil behind. A practical and well-planned enhanced oil recovery (EOR) method is needed. However, to plan a successful project, the …

Low-Density Static Granular Media Filter Bed Turbidity Removal Model, Matthew Louque

LSU Master's Theses

The scattering of light within a fluid, referred to as its turbidity, was investigated against the presence of suspended solids. A linear regression analysis was conduced against turbidity and the total count, combined surface area, and combined volume of the suspended particles for various surface water sources (lakes, rivers, indoor aquaculture systems). It was found that the total combined surface area of suspended particles had the best linear correlation to turbidity, with an adjusted R² of 81.79%. This correlation was integrated with a current theoretical model for predicting solids removal across a granular bed to yield an Integrated Turbidity …

Long-Term Durability Of Frp Bond In The Midwest United States For Externally-Strengthened Bridge Components, Sasan Siavashi, Christopher D. Eamon, Abdel A. Makkawy, Hwai-Chung Wu

Civil and Environmental Engineering Faculty Research Publications

In this study, the bond strength of a typical FRP system subjected to long-term natural weathering in the Midwest United States is experimentally investigated, and the rate of degradation is estimated. To do this, the bond strength of an FRP system exposed to over fifteen years of weathering is determined with pull-off testing, and a relationship between strength reduction and exposure time is developed using regression analysis. For unweathered specimens, it was found that the attachment strength of the FRP system was governed by the concrete substrate, while for weathered specimens, the FRP system could detach by either a failure …

Key Engineering Challenges In The Biomanufacturing Of Lentiviral Viral Vectors, Peter Jones

Advancing Manufacture of Cell and Gene Therapies VI [2019]

No Abstract.

A Triaxial Applicator For The Measurement Of The Electromagnetic Properties Of Materials, Saranraj Karuppuswami, Edward Rothwell, Premjeet Chahal, Michael J. Havrilla

Faculty Publications

The design, analysis, and fabrication of a prototype triaxial applicator is described. The applicator provides both reflected and transmitted signals that can be used to characterize the electromagnetic properties of materials in situ. A method for calibrating the probe is outlined and validated using simulated data. Fabrication of the probe is discussed, and measured data for typical absorbing materials and for the probe situated in air are presented. The simulations and measurements suggest that the probe should be useful for measuring the properties of common radar absorbing materials under usual in situ conditions.

Two-Stage Bagging Pruning For Reducing The Ensemble Size And Improving The Classification Performance, Hua Zhang, Yujie Song, Bo Jiang, Bi Chen, Guogen Shan

Environmental & Global Health Faculty Research

Ensemble methods, such as the traditional bagging algorithm, can usually improve the performance of a single classifier. However, they usually require large storage space as well as relatively time-consuming predictions. Many approaches were developed to reduce the ensemble size and improve the classification performance by pruning the traditional bagging algorithms. In this article, we proposed a two-stage strategy to prune the traditional bagging algorithm by combining two simple approaches: accuracy-based pruning (AP) and distance-based pruning (DP). These two methods, as well as their two combinations, “AP+DP” and “DP+AP” as the two-stage pruning strategy, were all examined. Comparing with the single …

Major Grant Awarded To Usu Biological Engineering Professor | College Of Engineering, Utah State University

College of Engineering News

USU biological engineering assistant professor Elizabeth Vargis received a three-year grant from the National Eye Institute for her ongoing research in better understanding why new blood cells form during retinal disease.

1883 - A Popular History Of California _ From The Earliest Period Of Its Discovery To The Present Time, Lucia Norman

Miscellaneous Documents and Reports

Published originally in 1867, this second edition included events that transpired during the intervening years (1867-1883). Topics covered included, but not limited to, were a eescription of California, it’s discovery, the sufferings of Cortez and his Followers, Spaniards neglect of California, the commerce of Spain disrupted by Privateers, Viscaino’s second expedition, Father Salva-Tierra at San Dionysio, the insurrection of the Pericues, earliest settlements in Upper California, the Discovery of the Bay of San Francisco, establishment of missions, Mission Delores, the state of the converted Indians, Captain John A. Sutter, Stockton subjugation of California, California ceded to the United States by …

Tangential Flow Filtration And Scalability In Viral Vector Purification, Eni Sterjanaj, Heather Mall, Rachel Legmann, Jacky Dang

Advancing Manufacture of Cell and Gene Therapies VI [2019]

Pall Biotech has linearly scalable tangential flow filtration technology that can cover processing volume ranges from less than a liter to over 2000 liters. Manual assemblies can be used with Pall TFF filters in scales under 20L and programmable skids are available for larger scales. In this document TFF linear scalability of up to 200 liters is covered starting from a 7L initial volume and maintaining similar pressures, processing times and yields at all scales. Using this scalable technology Pall biotech can help biologics companies go to clinical trials and to commercial scale manufacturing successfully.

Please click Additional Files below …

An Experimental And Numerical Investigation Of Flow Accelerated Flibe Corrosion, David B. Weitzel

Nuclear Engineering ETDs

Renewed interest in molten salt reactor technology has brought to light the need for a better understanding of FLiBe corrosion. To this end a flowing FLiBe corrosion test loop was designed to test the flow effects of FLiBe corrosion. The loop consists of a pump, melt tank, and stainless-steel tubing assembly that heats the molten salt to high temperatures and circulates it over test specimens. The experiment has been constructed and has completed initial shakedown testing.

To support the flowing FLiBe experiment, a numerical corrosion model that couples FLiBe electrochemistry, solid metal diffusion, and mass transport was implemented. The model …

Low Temperature Multi Effects Desalination-Mechanical Vapor Compression Powered By Supercritical Organic Rankine Cycle, Eydhah Almatrafi

USF Tampa Graduate Theses and Dissertations

Utilizing low grade heat sources such as geothermal, solar or waste heat has received a high attention in recent years. A lot of research has discussed using Organic Rankine Cycle (ORC) as subcritical or supercritical in power generation. However, very few studies extend their research in utilizing ORC in other applications such as desalination. For reverse osmosis (RO) desalination, which is considered a membrane technology, the use of supercritical-ORC in low grade heat sources is more favorable than subcritical-ORC. Thus, studies of utilizing either subcritical-ORC or supercritical-ORC for thermal desalination that use power and heat from Rankine cycle are rare …

Conference Program, Dolores Baksh, Rod Rietze, Ivan Wall

Advancing Manufacture of Cell and Gene Therapies VI [2019]

No abstract provided.

Workshop Agenda, Fernanda Masri

Advancing Manufacture of Cell and Gene Therapies VI [2019]

No abstract provided.

Development Of A Closed Car-T Manufacturing Process, Loo-Yong Steven Kee, Calley Hirsch, Devina Ramsaroop, Elizabeth Csaszar, Danylo Sirskyj, Aaron Dulgar-Tulloch

Advancing Manufacture of Cell and Gene Therapies VI [2019]

The field of immunotherapy has emerged as a promising new type of treatment for cancer with the approval of the first two CAR-T therapies. The clinical success of T-cell based immunotherapies necessitates a robust manufacturing process for these products to be consistently produced at commercial scale. Our CAR-T workflow combines unit operation specific solutions for thaw of an apheresis unit, wash, CD3 selection, T-cell activation, lentiviral transduction, incubator- and reactor-based expansion culture, harvest, formulation, cryopreservation and thaw of CAR-T product. We have evaluated the impact of both serum-containing and xeno-free culture media, commercially available T-cell selection and activation reagents, closed …

Scale-Up Study For Ex-Vivo Expansion Of Allogeneic Natural Killer Cells In Stirred-Tank Bioreactor, Juyoung Kim, Hyung Jin Nam, Sang Hyun Lee, Jong Beom Ku, Seung Ryel Han, Hye Jin Shin, Yu Kyeong Hwang, Sang Hoon Paik

Advancing Manufacture of Cell and Gene Therapies VI [2019]

Natural killer (NK) cells are a type of lymphocyte in the blood that are responsible for innate and adaptive immune response, and they mature in the liver and bone marrow. Being a key role in host defense system with direct and indirect killing of virus-infected cells or cancer cells, NK cell has been considered an attractive candidate for cancer therapy. Peripheral blood shows the low frequency of NK cells, so ex vivo expansion method is important to obtain sufficient NK cells for therapeutic use. Currently, we successfully developed bioreactor process for NK cell expansion on lab-scale. Stirred-tank bioreactor could be …

Single Use Disposable Biosettler Removes The Dead Cells And Cell Debris Selectively To Increase The Viability Percentage Of Mammalian Cells (E.G., Car-T) During Expansion, Dhinakar Kompala

Advancing Manufacture of Cell and Gene Therapies VI [2019]

Current challenge in a FDA approved cell therapy product for adult B-cell leukemia is reported to be the percentage of viable cells after manufacturing is sometimes out of specified range. As the head of a large contract development and manufacturing organization observed, this fall in viability percentage during CAR-T cell manufacturing is a challenge to the whole industry.

We present a simple and powerful off-the-shelf solution to this big challenge in all mammalian cell culture expansion bioreactor system. Our single use disposable BioSettler has been demonstrated to be uniquely capable of removing dead cells and cell debris selectively from the …

Disciplinary Learning From An Authentic Engineering Context, Catherine Langman, Judith Zawojewski, Patricia Mcnicholas, Ali Cinar, Eric Brey, Mustafa Bilgic, Hamidreza Mehdizadeh

Journal of Pre-College Engineering Education Research (J-PEER)

This small-scale design study describes disciplinary learning in mathematical modeling and science from an authentic engineeringthemed module. Current research in tissue engineering served as source material for the module, including science content for readings and a mathematical modeling activity in which students work in small teams to design a model in response to a problem from a client. The design of the module was guided by well-established principles of model-eliciting activities (a special class of problem-solving activities deeply studied in mathematics education) and recently published implementation design principles, which emphasize the portability of model-eliciting activities to many classroom settings.

Two …

Adsorbability Of Shale In Coal Measures And Its Influencing Factors, Zhang Baoxin, Fu Xuehai, Zhang Qinghui, Zhou Baoyan, Liu Zheng

Coal Geology & Exploration

In order to reveal the adsorption and gas-bearing characteristics of shale in coal measures, this study was based on the gas content, isotherm adsorption, high-pressure mercury injection, and liquid nitrogen adsorption of more than 200 coal shale in six major coal fields in Shanxi Province and Junggar basin. XRD diffraction and other measured data, the adsorption and gas characteristics of shale were analyzed, and the influencing factors were discussed. The results show that the measured gas content of shale is between 0-5.87 cm³/g, concentrated at 0.90-2.00 cm³/g; V_L is between 0.11-6.3 cm³/g with …

Distribution Characteristics Of Associated Elements In Middle Jurassic Coal In The North Of Datong Coalfield And Their Geological Significance, Qu Xiaorong

Coal Geology & Exploration

In order to study the geochemical characteristics and geological significance of associated elements in Middle Jurassic coal of Datong coalfield, the distribution and occurrence of the associated elements in 9 coal seams in the northern Datong coalfield were analyzed by inductively coupled plasma mass spectrometry(ICP-MS), X-ray diffraction(XRD), optical electron microscopy and scanning electron microscopy(SEM). The results show that the Jurassic coal in Datong coalfield has low trace element content, and beneficial elements(Li, Ga) are far lower than the boundary grade, which has no development potential. But the harmful elements such as Co and Zn in No.2 coal, Tl in No.9, …

Storage Rule And Controlling Factors Of Coalbed Gas In Zhaoguan Mine Field Of Huanghebei Coalfiled, Song Xiaozhong

Coal Geology & Exploration

Storage rule and controlling factors of coalbed gas in Zhaoguan mine field were analyzed on the basis of the generation, storage and migration theory of coalbed gas in combination with the data of geological exploration and mine production. From research on the regional geological evolution, coal generating and storing capacity and lithologic characteristics, geological structure, burial depth, bedrock thickness, hydrogeological conditions and magmatic intrusion, it was found that underground hydrodynamic conditions and magmatic intrusion events are the controlling factors of coalbed gas storage in the mine. Underground hydrodynamic conditions had obvious effect, shallow hydrodynamic conditions were manifested mainly as migration …

Slope Stability Evaluation Based On Set Pair Cloud Model, Yao Jianye, Zhang Shan, Hao Guoqiang

Coal Geology & Exploration

When the set pair analysis is applied to evaluate slope stability, the connection degree is usually decided by linear function, which can't reflect the actual conditions of the engineering project objectively and comprehensively and neglect the system randomness. The set pair analysis theory is improved by application of cloud theory which is superior in dealing with the connection degree and set pair analysis-cloud model of slope stability evaluation is established. In this model, the weight matrix is obtained by using the cloud theory to improve the AHP, and the evaluation matrix is obtained by combining with the connection degree evaluation …

Microseismic Positioning Method Based On Differential Evolution Algorithm, Wang Yunhong, Wang Baoli, Duan Jianhua

Coal Geology & Exploration

Aiming at the problem that the location accuracy of conventional time-based microseismic location method depends on the accuracy of travel time, a differential evolution microseismic location method is proposed to improve the locating target function. Based on the traditional micro-seismic P-wave travel-time location method, the error weighting coefficient was added to the localization objective function, which reduced the impact of the first-time picking accuracy on the microseismic location by reducing the effect of the microseismic signal path with low initial pick-up accuracy on the locating error. The differential evolution algorithm, through population initialization, mutation, crossover, and selection operations, solves the …

Development And Application Of Geocoal For In-Seam Seismic Data Processing, Wang Baoli, Jin Dan

Coal Geology & Exploration

A data processing platform for in-seam seismic exploration(ISS) was developed, which can make ISS better serve safe production in coal mines. The software design architecture was constructed, and the function modules and the software running environment are introduced. Finally, some software interfaces and results were demonstrated.

Analysis Of Influencing Parameters Of Temperature Field In A New Pipe-Roofing Freezing Method, Wu Yuwei, Li Chunfang, Hu Jun, Wang Zhixin, Wang Shucheng

Coal Geology & Exploration

The development status of the temperature field around the freezing pipe in the method of pipe roofing freezing is the technical focus of this construction method. In order to study the development of the temperature field in this method, two paths are selected in the model, and analysis points are placed on the path. By analyzing the effects of soil thermal conductivity, volumetric heat capacity, latent heat of phase change, and original ground temperature on the development law of the temperature field, the following conclusion was drawn:Compared with the method of freezing the pipe curtain of the Gongbei tunnel in …

Table Of Contents, The Editors

Coal Geology & Exploration

No abstract provided.

Present Situation And Prospect Of Drilling Equipment Technology In Coal Mine, Yao Ke, Tian Hongliang, Yao Ningping, Yin Xinsheng, Fang Peng, Yao Yafeng, Wu Di, Wang Longpeng

Coal Geology & Exploration

After over 40 years of development, the technology of underground drilling equipment, vital to guarantee safety and efficient production for coal mines, has been improved greatly. Combining with the characteristics of products, types of technology and application domains, the development of domestic and foreign of underground drilling equipment for coal mines are introduced, the application effects and existing problems of drilling machines are analyzed, especially the development experience and current situation of domestic drilling machines are summarized, detailing on technology status of the five most representative models, such as the split type drill, caterpillar drill, electro-hydraulic control drill, rubber wheel …

Coupling Relationship Between Oil And Gas Of Mesozoic Coal-Bearing Measures And Uranium Metallogenesis In Huangling Area, Si Qinghong, Cao Huifeng, Li Jianguo, Sima Xianzhang, Yu Reng‘An, Liu Houning, Liu Xiaoxue, Zhang Chao

Coal Geology & Exploration

In order to clarify the coupling relationship between oil and gas of Mesozoic coal-bearing measures(reservoir) and uranium deposits(points) in Huangling area, field geology investigations of boreholes and sections, analysis and processing of borehole data and experimental data, and integration of reservoir and uranium(point) information were carried out. Collation and systematic study of tectonic-sedimentary systems of Mesozoic coal-bearing mesure, uranium geological characteristics, oil and gas geology characteristics, spatial distribution relationship between hydrocarbon reservoirs and uranium deposits, genetic relationship between hydrocarbon-bearing fluids and uranium-associated altered minerals, and the time relationship between hydrocarbons and uranium mineralization were discussed. The study shows that the …