Engineering Commons^™

Effect Of Carbon Nanotubes On Anodic Properties Of Ti/Ru-Ir-Sn Oxides, Feng Lian, Yong-Lei Xin, Bo-Jiang Ma, Li-Kun Xu

Journal of Electrochemistry

The Ru-Ir-Sn metal oxide anodes coated on titanium (Ti/Ru-Ir-Sn) were prepared by thermal decomposition. The effects of amounts of carbon naotubes (CNTs) on anodic properties were studied by TGA, SEM, EDS, cyclic voltammetry, EIS, polarization measurements and accelerated life test. The thermogravimetric analysis and EDS spectrum data showed that the high temperature oxidation decomposition of CNTs did not take place under the condition of the sintering temperature of 470 ℃, and the CNTS still existed in the anode coating in an element form. Compared with the contrast samples, the surface crack of the coating increased, but remained typical morphology. Adding …

Reaction Mechanisms Study Of Pb Electrodes In Sulfuric Acid And Sodium Sulfate Solutions By Eqcm, Xian-Ping Zou, Zong-Xuan Kang, Yu-Lan Huang, Dong Shu, Ya-Yun Zhong, Jun-Nan Hao, Yu-Qing Liao

Journal of Electrochemistry

Surface reaction processes of Pb electrodes were investigated in H₂SO₄ and Na₂SO₄ solutions by LSV, CV and EQCM. The results in the voltammogram and the mass change curve of the Pb electrode indicated that the oxide products of lead included PbSO4 and PbO·PbSO₄ in sulfuric acid solution with a positive-going potential scan from -1.0 V to -0.4 V and then PbO·PbSO₄ transformed into PbSO₄. However, the oxide product of lead was only PbSO₄ in sodium sulfate solution. The experimental results revealed that the acid solution is necessary for the …

Synthesis Of Unmanned Aircraft Systems Safety Reports, Robert Joslin

Journal of Aviation Technology and Engineering

The proliferation and extension of unmanned aircraft systems from military to civil and public use applications has rapidly outpaced the safety analysis that is normally associated with the introduction of a new and novel aircraft. Insights into the types of anomalous events associated with accidents and incidents involving civil and public use unmanned aircraft systems operating in the National Airspace System were derived from an information synthesis of archival, publically available reports from the Aviation Safety Information and Analysis Sharing system. The vast majority of anomalous events were related to equipment failures, primarily lost link, distantly followed by a variety …

Assessment Of Empirical Equations For The Compression Index Of Fine-Grained Soils In Missouri, Site Onyejekwe, Xin Kang, Louis Ge

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The use of correlations and empirical relationships in geotechnical engineering provides a fast, cost-effective means of predicting the value of a parameter based on the values of certain other, possibly more easily determined, parameters. The correlation between two or more soil properties has been found to be dependent in varying degrees on soil type, the testing method used to obtain the numerical value of the parameter itself and the homogeneity of the soil. Many empirical correlations among soil properties have been published. These correlations, based on widely sourced data, may not be appropriate for local situations. Hence, there is a …

Augmented Reality In Android Devices, Fatima Aldaeif

Theses and Dissertations

Augmented Reality is a computer graphic system combines a virtual object with a real physical world, and this work present kind of augmented reality which is called a 3D Eyeglasses Try-on real time tracking system, with help of the mobile phone camera. This system follow the motion of the face user, and renders the glasses immediately in front of the user eyes. This thesis tells that Android OpenCV SDK is applied to recognize the features, extract the characteristic target and make the camera calibration to create an Augmented Reality application.

Developing Pavement Performance Prediction Models For The State Of Arkansas, Lena Baker Abu-Ennab

Theses and Dissertations

Pavement management systems (PMS) provide a methodology for synthesizing all the activities related to the pavement network. These include all the activities involved in the planning and programming, design, construction, maintenance, and rehabilitation (1). The effective implementation and utilization of PMS requires a systematic approach involving condition assessment and performance modelling. A very important part of such approach is the use of pavement performance prediction models to predict the future condition of pavements based on present condition. This study presents a methodology used to develop network level pavement performance prediction models for the pavement network in the state of Arkansas. …

Direct Regularization From Co-Registered Anatomical Images For Mri-Guided Near-Infrared Spectral Tomographic Image Reconstruction, Limin Zhang, Yan Zhao, Shudong Jiang, Brian W. Pogue, Keith Paulsen

Dartmouth Scholarship

Combining anatomical information from high resolution imaging modalities to guide near-infrared spectral tomography (NIRST) is an efficient strategy for improving the quality of the reconstructed spectral images. A new approach for incorporating image information directly into the inversion matrix regularization was examined using Direct Regularization from Images (DRI), which encodes the gray-scale data into the NIRST image reconstruction problem. This process has the benefit of eliminating user intervention such as image segmentation of distinct regions. Specifically, the Dynamic Contrast Enhanced Magnetic Resonance (DCE-MR) image intensity value differences within the anatomical image were used to implement an exponentially-weighted regularization function between …

Vessel Tracking Using Automatic Identification System Data In The Arctic, Torkild Eriksen, Øystein Olsen

ShipArc 2015 Conference

No abstract provided.

Medium-Range Forecast Of The Arctic Sea-Ice Cover Using The Satellite Observation Data, Kimura Noriaki

ShipArc 2015 Conference

No abstract provided.

Use Of Satellite Sar Observations Integrated In Arctic Maritime Situational Awareness, Hans Eilif Larsen

ShipArc 2015 Conference

No abstract provided.

A Brief History Of Space - Sse 120 Questions 01, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs on "A Brief History of Space - Questions 01" from August 26, 2015.

Carbon Dioxide Sorption In A Nanoporous Octahedral Molecular Sieve, Izaak Williamson, Eric B. Nelson, Lan Li

Materials Science and Engineering Faculty Publications and Presentations

We have performed first-principles density functional theory calculations, incorporated with van der Waals interactions, to study CO₂ adsorption and diffusion in nanoporous solid – OMS-2 (Octahedral Molecular Sieve). We found the charge, type, and mobility of a cation, accommodated in a porous OMS-2 material for structural stability, can affect not only the OMS-2 structural features but also CO₂ sorption performance. This paper targets K⁺, Na⁺, and Ba²⁺ cations. First-principles energetics and electronic structure calculations indicate that Ba²⁺ has the strongest interaction with the OMS-2 porous surface due to valence electrons donation to …

System And Method For Estimating States Of Spacecraft In Planet-Moon Environment, Piyush Grover

Department of Mechanical and Materials Engineering: Faculty Publications

A method estimates a state of a spacecraft in a planet-moon environment by executing iteratively a particle filter. The particle filter comprising integrates individually states of each particle of the particle filter according to a probability-evolution equation using a model of the state of the spacecraft represented as a planar circular restricted three-body problem and determines a prior probability of each particle as a previous posterior probability of a corresponding particle during a previous iteration. A joint probability distribution of the state of the spacecraft is determines using the states of each particle and the prior probabilities of each particle …

Logarithmic Intensity Compression In Fluorescence Guided Surgery Applications, Alisha V. Dsouza, Huiyun Lin, Jason Gunn, Brian W. Pogue

Dartmouth Scholarship

The use of fluorescence video imaging to guide surgery is rapidly expanding, and improvements in camera readout dynamic range have not matched display capabilities. Logarithmic intensity compression is a fast, single-step mapping technique that can map the useable dynamic range of high-bit fluorescence images onto the typical 8-bit display and potentially be a variable dynamic contrast enhancement tool. We demonstrate a ∼4.6  times improvement in image quality quantified by image entropy and a dynamic range reduction by a factor of ∼380 by the use of log-compression tools in processing in vivo fluorescence images.

A Brief History Of Space - Sse 120 Questions 02, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs on "A Brief History of Space - Questions 02" from August 25, 2015.

A Brief History Of Space - Sse 120 Questions 04, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs on "A Brief History of Space - Questions 04" from August 25, 2015.

A Brief History Of Space - Sse 120 Questions 03, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs on "A Brief History of Space - Questions 03" from August 25, 2015.

Map-Aware Adaptive Automotive Radar, Jae Seung Lee, Nikola Steven Subotic, James Paul Ebling, Helen Kourous-Harrigan

Michigan Tech Patents

A dedicated short range radar system is provided for use with a GPS system. The radar system includes a transmitter which transmits a microwave radio signal. A receiver is coupled to a horizontally scanning receiver antenna array which receives an echo, if present, from the radio signal transmitted by the transmitter. The radio receiver then generates an output signal representative of the echo. A control circuit then receives the output signal from the antenna array as well as the output signal from the GPS system. The control circuit then varies the mode of operation of the receiver and/or the transmitter …

Impaired Regulation Post-Stroke Of Motor Unit Firing Behavior During Volitional Relaxation Of Knee Extensor Torque Assessed Using High Density Surface Emg Decomposition, Spencer A. Murphy, Reivian Berrios, P. Andrew Nelson, Francesco Negro, Dario Farina, Brian D. Schmit, Allison S. Hyngstrom

Physical Therapy Faculty Research and Publications

The purpose of this study was to use high density surface EMG recordings to quantify stroke-related abnormalities in motor unit firing behavior during repeated sub-maximal knee extensor contractions. A high density surface EMG system (sEMG) was used to record and extract single motor unit firing behavior in the vastus lateralis muscle of 6 individuals with chronic stroke and 8 controls during repeated sub-maximal isometric knee extension contractions. Paretic motor unit firing rates were increased with subsequent contractions (6.19±0.35 pps vs 7.89±0.66 pps, P

Experimental Investigation Of Mechanical And Thermal Properties Of Silica Nanoparticle-Reinforced Poly(Acrylamide) Nanocomposite Hydrogels, Josergio Zaragoza, Nasim Babhadiashar, Victor O’Brien, Andrew Chang, Matthew Blanco, Aitor Zabalegui, Hohyun Lee, Prashanth Asuri

Bioengineering

Current studies investigating properties of nanoparticle-reinforced polymers have shown that nanocomposites often exhibit improved properties compared to neat polymers. However, over two decades of research, using both experimental studies and modeling analyses, has not fully elucidated the mechanistic underpinnings behind these enhancements. Moreover, few studies have focused on developing an understanding among two or more polymer properties affected by incorporation of nanomaterials. In our study, we investigated the elastic and thermal properties of poly(acrylamide) hydrogels containing silica nanoparticles. Both nanoparticle concentration and size affected hydrogel properties, with similar trends in enhancements observed for elastic modulus and thermal diffusivity. We also …

Scalable Speech Coding For Ip Networks, Koji Seto

Engineering Ph.D. Theses

The emergence of Voice over Internet Protocol (VoIP) has posed new challenges to the development of speech codecs. The key issue of transporting real-time voice packet over IP networks is the lack of guarantee for reasonable speech quality due to packet delay or loss.

Most of the widely used narrowband codecs depend on the Code Excited Linear Prediction (CELP) coding technique. The CELP technique utilizes the long-term prediction across the frame boundaries and therefore causes error propagation in the case of packet loss and need to transmit redundant information in order to mitigate the problem. The internet Low Bit-rate Codec …

What Is Orbital Debris?, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs on "What is Orbital Debris?" from August 24, 2015.

Brief Look At The Environment Of Space, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs titled "Brief Look at the Environment of Space" from August 24, 2015.

Research On Prevention Of Ship-Induced Pollution To Drinking Water Source In The Yangtze Estuary Of Shanghai Sector, Detong Zhu

Maritime Safety & Environment Management Dissertations (Dalian)

No abstract provided.

A Study On Navigation Safety On Putou Branch Channel Extension Project For Meizhou Bay, Kui Zhao

Maritime Safety & Environment Management Dissertations (Dalian)

No abstract provided.

Design And Research Of Vlcc Vessel Virtual Marine Engine Room, Chuang Zhao

Maritime Safety & Environment Management Dissertations (Dalian)

No abstract provided.

Risk Assessment On Carriage Of Maritime Dangerous Goods In Packaged Form By Ship, Sifang Zeng

Maritime Safety & Environment Management Dissertations (Dalian)

No abstract provided.

Optimization Of Containership Speed Based On Operation And Environment Regulations, Changjiang Yu

Maritime Safety & Environment Management Dissertations (Dalian)

No abstract provided.

Safety Evaluation Of Navigation Environment In Yangzhou Section Of The Yangtze River, Wei Xu

Maritime Safety & Environment Management Dissertations (Dalian)

No abstract provided.

Risk Assessment Of Water Area In The Shanghai Port, Na Lin

Maritime Safety & Environment Management Dissertations (Dalian)

No abstract provided.