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Improved Geometry Modeling For High Fidelity Parametric Design, James Gloudemans, Robert McDonald 2010 California Polytechnic State University, San Luis Obispo

Improved Geometry Modeling For High Fidelity Parametric Design, James Gloudemans, Robert Mcdonald

Robert A. McDonald

Advanced multidisciplinary physics-based design and analysis capabilities are required to pursue the revolutionary vehicle and technology concepts needed to meet the goals of the aerospace industry for the next 10-30 years. The multidisciplinary physics critical to advancing aerospace technology all have one common bond, the shape, size, and form of the underlying aircraft - its geometry. An aircraft shape is the natural starting point for multidisciplinary analysis and optimization (MDAO). Vehicle Sketch Pad (VSP) is an aircraft geometry tool for rapid evaluation of advanced design concepts which was developed by NASA and is available to industry at large. VSP allows designers ...


Floornet: Deployment And Evaluation Of Amultihop Wireless 802.11 Testbed, Pablo Serrano, Carlos J. Bernardos, Antonio de la Oliva, Albert Banchs, Ignacio Soto, Michael Zink 2010 University of Massachusetts - Amherst

Floornet: Deployment And Evaluation Of Amultihop Wireless 802.11 Testbed, Pablo Serrano, Carlos J. Bernardos, Antonio De La Oliva, Albert Banchs, Ignacio Soto, Michael Zink

Michael Zink

A lot of attention has been given to multihop wireless networks lately, but further research—in particular, through experimentation—is needed. This attention has motivated an increase in the number of 802.11-based deployments, both indoor and outdoor. These testbeds, which require a significant amount of resources during both deployment and maintenance, are used to run measurements in order to analyze and understand the limitation and differences between analytical or simulation-based figures and the results from real-life experimentation. This paper makes two major contributions: (i) first, we describe a novel wireless multihop testbed, which we name FloorNet, that is deployed ...


Parameter Estimation Of Fundamental Technical Aircraft Information Applied To Aircraft Performance, Mike Vallone, Robert A. McDonald 2010 California Polytechnic State University - San Luis Obispo

Parameter Estimation Of Fundamental Technical Aircraft Information Applied To Aircraft Performance, Mike Vallone, Robert A. Mcdonald

Robert A. McDonald

Inverse problems can be applied to aircraft in many areas. One of the disciplines within the aerospace industry with the most openly published data is in the area of aircraft performance. Many aircraft manufacturers publish performance claims, flight manuals and Standard Aircraft Characteristic (SAC) charts without any mention of the more fundamental technical information such as CD0. With accurate tools, generalized aircraft models and a few curve-fitting techniques, it is possible to evaluate vehicle performance and estimate these technical parameters.

With this goal a program has been written in Matlab to calculate the fundamental information behind a general ...


Designing A Green Aircraft: Cal Poly's 2009 Undergraduate Aircraft Designs, Robert A. McDonald, Bruce Wright 2010 California Polytechnic State University, San Luis Obispo

Designing A Green Aircraft: Cal Poly's 2009 Undergraduate Aircraft Designs, Robert A. Mcdonald, Bruce Wright

Robert A. McDonald

The Cal Poly senior design class submitted six designs this year in response to the 2009 Undergraduate Team Aircraft Design Competition. This paper summarizes our experiences teaching design through this RFP and brings the student's insights together.


Anticipating Technological Change: Predictions, Trends And Gadgets, Carol Watson 2010 University of Georgia School of Law Library

Anticipating Technological Change: Predictions, Trends And Gadgets, Carol Watson

Carol A. Watson

With the current economic downtown, today's business environment is more competitive than ever. Businesses that distinguish themselves in any small way and provide cost-savings, can gain a significant advantage over their rivals. To emphasize the point, note that the ABA Techshow 2009 has a session titled: If You’re Not Serving Your Clients Online, Someone Else Will Be. It is, therefore, essential that attorneys harness technology and remain up-to-date on the latest computer developments . In this paper, I will begin by discussing technologies that are currently available on the web that will increase your abilities to collaborate, reduce your ...


Effect Of Au And Au@Ag Core-Shell Nanoparticles On The Sers Of Bridging Organic Molecules., REMZIYE GUZEL Dr., ZAFER USTUNDAG Dr., HASLET EKSI, SELDA KESKIN Dr., BILGE TANER, ZEYNEP DURGUN, ALI OSMAN SOLAK Prof. Dr. 2010 The Pennsilyvania State University, Department of Chemistry

Effect Of Au And Au@Ag Core-Shell Nanoparticles On The Sers Of Bridging Organic Molecules., Remziye Guzel Dr., Zafer Ustundag Dr., Haslet Eksi, Selda Keskin Dr., Bilge Taner, Zeynep Durgun, Ali Osman Solak Prof. Dr.


No abstract provided.


Modeling Nanoparticle Formation During Early Stages Of Zeolite Growth: A Low-Coordination Lattice Model Of Template Penetration, Peter A. Monson, L. Jin, Scott M. Auerbach 2010 University of Massachusetts - Amherst

Modeling Nanoparticle Formation During Early Stages Of Zeolite Growth: A Low-Coordination Lattice Model Of Template Penetration, Peter A. Monson, L. Jin, Scott M. Auerbach

Peter A. Monson

We present an extension of the simple-cubic lattice model developed by Jorge et al. [ J. Am. Chem. Soc. 2005, 127, 14388] of nanoparticle growth in the clear solution synthesis of silicalite-1 (MFI). We have implemented the model on a body-center cubic (bcc) lattice with second-neighbor repulsions, to generate a four-coordinate network that mimics the tetrahedral structure of silica. With this low-coordination lattice model we observe that the nanoparticles are metastable, possessing a core−shell structure with mostly silica in the core and templates forming a shell. Nanoparticle size is found to increase with temperature and decrease with solution pH, in ...


Activity-Aware Mental Stress Detection Using Physiological Sensors, Feng-Tso Sun, Cynthia Kuo, Heng-Tze Cheng, Senaka Buthpitiya, Patricia Collins, Martin L. Griss 2010 Carnegie Mellon University

Activity-Aware Mental Stress Detection Using Physiological Sensors, Feng-Tso Sun, Cynthia Kuo, Heng-Tze Cheng, Senaka Buthpitiya, Patricia Collins, Martin L. Griss

Silicon Valley Campus

"Continuous stress monitoring may help users better understand their stress patterns and provide physicians with more reliable data for interventions. Previously, studies on mental stress detection were limited to a laboratory environment where participants generally rested in a sedentary position. However, it is impractical to exclude the effects of physical activity while developing a pervasive stress monitoring application for everyday use. The physiological responses caused by mental stress can be masked by variations due to physical activity. We present an activity-aware mental stress detection scheme. Electrocardiogram (ECG), galvanic skin response (GSR), and accelerometer data were gathered from 20 participants across ...


Hyphive : A Hybrid Virtual-Physical Collaboration Environment, Senaka Buthpitiya, Ying Zhang 2010 Carnegie Mellon University

Hyphive : A Hybrid Virtual-Physical Collaboration Environment, Senaka Buthpitiya, Ying Zhang

Silicon Valley Campus

Virtual world conferences have been shown to give users an increased sense of presence in a collaboration as opposed to teleconferences, video-conferences and web- conferences. Such telepresence encourages remote participants to engage in the collaboration. Current virtual world collaboration applications rely on mouse/keyboard interfaces to create pure-virtual collaborations. In this paper we propose HyPhIVE, a system to address hybrid collaboration between the physical world and virtual worlds. In hybrid collaboration scenarios, a group of people collaborate in the real world and others join them remotely via a virtual world. HyPhIVE uses non-intrusive mobile sensors to detect real world users ...


Coral: Solving Complex Constraints For Symbolic Pathfinder, Corina Pasareanu, Marcelo d’Amorim, Mateus Borges, Matheus Souza 2010 Carnegie Mellon University

Coral: Solving Complex Constraints For Symbolic Pathfinder, Corina Pasareanu, Marcelo D’Amorim, Mateus Borges, Matheus Souza

Silicon Valley Campus

Symbolic execution is a powerful automated technique for
generating test cases. Its goal is to achieve high coverage of software.
One major obstacle in adopting the technique in practice is its inability
to handle complex mathematical constraints. To address the problem,
we have integrated CORAL’s heuristic solvers into NASA Ames’ Symbolic
PathFinder symbolic execution tool. CORAL’s solvers have been designed
to deal with mathematical constraints and their heuristics have been
improved based on examples from the aerospace domain. This integration
significantly broadens the application of Symbolic PathFinder at NASA
and in industry.


Effect Of Film Thickness On The Thermal Resistance Of Confined Semiconductor Thin Films, Eric S. Landry, Alan J.H. McGaughey 2010 Carnegie Mellon University

Effect Of Film Thickness On The Thermal Resistance Of Confined Semiconductor Thin Films, Eric S. Landry, Alan J.H. Mcgaughey

Department of Mechanical Engineering

The thermal resistance of semiconductor thin films is predicted using lattice dynamics (LD) calculations and molecular dynamics (MD) simulations. We consider Si and Gefilms with thicknesses, LF, between 0.2 and 30 nm that are confined between larger extents of the other species (i.e., Ge/Si/Ge and Si/Ge/Si structures). The LD predictions are made in the classical limit for comparison to the classical MD simulations, which are performed at a temperature of 500 K. For structures with LF<2 nm, the thin film thermal resistance increases rapidly with increasing film thickness, a trend we attribute to changes in the allowed vibrational states in the film. These changes are found to affect the dependence of the phonontransmission coefficient on incidence angle for the Ge/Si/Ge structures and on frequency for the Si/Ge/Si structures. When LF>2 nm, the MD-predicted thermal resistances are independent of the film thickness for the Ge/Si/Ge structures ...


Thermal Conductivity And Phonon Transport In Empty And Water-Filled Carbon Nanotubes, John A. Thomas, Ryan M. Iutzi, Alan J.H. McGaughey 2010 Carnegie Mellon University

Thermal Conductivity And Phonon Transport In Empty And Water-Filled Carbon Nanotubes, John A. Thomas, Ryan M. Iutzi, Alan J.H. Mcgaughey

Department of Mechanical Engineering

The thermal conductivities of empty and water-filled single-walled carbon nanotubes (CNTs) with diameters between 0.83 and 1.36 nm and lengths ranging from 200 to 1400 nm are predicted using molecular dynamics simulation. Using a direct application of the Fourier law, we explore the transition to fully diffusive phonon transport with increasing CNT length. For empty CNTs, we find that the CNT length required to obtain fully diffusive phonon transport decreases from 1090 nm for the 0.83-nm-diameter CNT to 510 nm for the 1.36-nm-diameter CNT. The magnitude of the fully diffusive thermal conductivity also decreases monotonically with ...


In-Plane Phonon Transport In Thin Films, Joseph E. Turney, Alan J.H. McGaughey, Cristina H. Amon 2010 Carnegie Mellon University

In-Plane Phonon Transport In Thin Films, Joseph E. Turney, Alan J.H. Mcgaughey, Cristina H. Amon

Department of Mechanical Engineering

The in-plane phononthermal conductivities of argon and siliconthin films are predicted from the Boltzmann transport equation under the relaxation time approximation. We model the thin films using bulk phononproperties obtained from harmonic and anharmonic lattice dynamics calculations. The input required for the lattice dynamics calculations is obtained from interatomic potentials: Lennard-Jones for argon and Stillinger–Weber for silicon. The effect of the boundaries is included by considering only phonons with wavelengths that fit within the film and adjusting the relaxation times to account for mode-dependent, diffuse boundary scattering. Our model does not rely on the isotropic approximation or any fitting ...


Msematters Newsletter Fall 2010, Department of Materials Science & Engineering 2010 University of Tennessee, Knoxville

Msematters Newsletter Fall 2010, Department Of Materials Science & Engineering

MSEMatters Newsletter

No abstract provided.


Mobile Context-Aware Personal Messaging Assistant, Senaka Buthpitiya, Deepthi Madamanchi, Sumalatha Kommaraju, Martin L. Griss 2010 Carnegie Mellon University

Mobile Context-Aware Personal Messaging Assistant, Senaka Buthpitiya, Deepthi Madamanchi, Sumalatha Kommaraju, Martin L. Griss

Silicon Valley Campus

A previous study shows that busy professionals receive in excess of 50 emails per day of which approximately 23% require immediate attention, 13% require attention later and 64% are unimportant and typically ignored. The flood of emails impact mobile users even more heavily. Flooded inboxes cause busy professionals to spend considerable amounts of time searching for important messages, and there has been much research into automating the process using email content for classification; but we find email priority depends also on user context. In this paper we describe the Personal Messaging Assistant (PMA), an advanced rule-based email management system which ...


A Language-Based Approach To Indexing Heterogeneous Multimedia Lifelog, Peng-Wen Cheng, Snehal Chennuru, Senaka Buthpitiya, Ying Zhang 2010 Carnegie Mellon University

A Language-Based Approach To Indexing Heterogeneous Multimedia Lifelog, Peng-Wen Cheng, Snehal Chennuru, Senaka Buthpitiya, Ying Zhang

Silicon Valley Campus

Lifelog systems, inspired by Vannevar Bush’s concept of “MEMory EXtenders” (MEMEX), are capable of storing a person’s lifetime experience as a multimedia database. Despite such systems’ huge potential for improving people’s everyday life, there are major challenges that need to be addressed to make such systems practical. One of them is how to index the inherently large and heterogeneous lifelog data so that a person can efficiently retrieve the log segments that are of interest. In this paper, we present a novel approach to indexing lifelogs using activity language. By quantizing the heterogeneous high dimensional sensory data ...


Anubis: An Attestation Protocol For Distributed Context-Aware Applications, Senaka Buthpitiya, Feng-Tso Sun, Heng-Tze Chen, Patrick Tague, Martin L. Griss, Anind K. Dey 2010 Carnegie Mellon University

Anubis: An Attestation Protocol For Distributed Context-Aware Applications, Senaka Buthpitiya, Feng-Tso Sun, Heng-Tze Chen, Patrick Tague, Martin L. Griss, Anind K. Dey

Silicon Valley Campus

Sharing sensitive context information among multiple distributed components in mobile environments introduces major security concerns. The distributed sensing, processing and actuating components of these applications can be compromised and modified or impersonated to extract private and confidential information or to inject false information. In this paper we present the Anubis protocol for remote code attestation and access control of distributed components using remote execution of trusted code. Our Anubis protocol leverages previous work in the fields of wireless sensor networks and secure web browsing. Anubis allows new components to be introduced to the environment without updating existing components. Our implementation ...


Imirok: Real-Time Imitative Robotic Arm Control For Home Robot Applications, Heng-Tze Cheng, Zheng Sun, Pei Zhang 2010 Carnegie Mellon University

Imirok: Real-Time Imitative Robotic Arm Control For Home Robot Applications, Heng-Tze Cheng, Zheng Sun, Pei Zhang

Silicon Valley Campus

Training home robots to behave like human can help people with their daily chores and repetitive tasks. In this paper, we present Imirok, a system to remotely control robotic arms by user motion using low-cost, off-the-shelf mobile devices and webcam. The motion tracking algorithm detects user motion in real-time, without classifier training or predefined action set. Experimental results show that the system achieves 90% precision and recall rate on motion detection with blank background, and is robust under the change of cluttered background and user-to-camera distance.


Contactless Gesture Recognition For Mobile Devices, Heng-Tze Cheng, An Mei Chen, Ashu Razdan, Elliott Buller 2010 Carnegie Mellon University

Contactless Gesture Recognition For Mobile Devices, Heng-Tze Cheng, An Mei Chen, Ashu Razdan, Elliott Buller

Silicon Valley Campus

While gesture interfaces become pervasive, most existing approaches are undesirable for mobile devices because of the high power consumption, or the inconvenience that users need to wear/hold specific sensors. In this paper, we present a contactless gesture recognition system for mobile devices using proximity sensors. A set of infrared signal feature extraction methods and a decision-tree-based gesture classifier are proposed. The system allows a user to interact with mobile devices using intuitive gestures, without touching the screen or wearing/holding any additional device. Evaluation results show that the system is low-power, and able to recognize gestures with over 98 ...


Contactless Gesture Recognition System Using Proximity Sensors, Heng-Tze Cheng, An Mei Chen, Ashu Razdan, Elliot Buller 2010 Carnegie Mellon University

Contactless Gesture Recognition System Using Proximity Sensors, Heng-Tze Cheng, An Mei Chen, Ashu Razdan, Elliot Buller

Silicon Valley Campus

In this paper, we present a novel contactless gesture recognition system using proximity sensors. A set of infrared signal feature extraction methods and a decision-tree-based gesture classifier are proposed. The system allows a user to interact with mobile devices using intuitive gestures, without touching the screen or wearing/holding any additional device. Evaluation results show that the system is low-power, and able to recognize 3D gestures with over 98% precision in real time.


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