Physical Sciences and Mathematics Commons^™

The Feasibility And Effectiveness Of A Common Consumer Device As An Electromagnetic Interference (Emi) Source, George H. Baker, Nathan L. Olive, Joseph M. Darragh, Joseph D. Rudmin

George H Baker

Because the operation and control of most critical infrastructures are highly dependent on electronics, it is important to understand the feasibility and effectiveness of devices that may be used to intentionally interfere with electronic system operation. This research project investigated (1) the feasibility of building a high power electromagnetic interference source from a common consumer item and (2) the effects of this source on the operation of personal computers. We were successful in fabricating a “shop-expedient” high power microwave (HPM) source by modifying a common microwave oven. Project results confirm that, with straightforward modifications, a common microwave oven can be …

Application Of Correlation-Gas Chromatography To Evaluate The Vaporization Enthalpy Of A Component In An Equilibrium Mixture, Manuel Temprado, James S. Chickos

James Chickos

No abstract provided.

Co-Generation Of Text And Graphics, David G. Novick, Brian Lowe

David G. Novick

content in documentation, it is possible to produce both text and graphics from a single common source. One approach to co-generation of text and graphics uses a single logical specification; a second approach starts with CAD-based representation and produces a corresponding textual account. This paper explores these two different approaches, reports the results of using prototypes embodying the approaches to represent simple figures, and discusses issues that were identified through use of the prototypes. While it appears feasible to co-generate text and graphics automatically, the process raises deep issues of design of communications, including the intent of the producer of …

Unraveling The Mechanism Of A Potent Transcriptional Activator, Brian Brennan, Zhen Lu, Steven Rowe, Sarah Davis, Renee Metzler, Johnathan Nau, Chinmay Majmudar, Anna Mapp, Aseem Ansari

Brian B. Brennan

Despite their enormous potential as novel research tools and therapeutic agents, artificial transcription factors (ATFs) that up-regulate transcription robustly in vivo remain elusive. In investigating an ATF that does function exceptionally well in vivo, we uncovered an unexpected relationship between transcription function and a binding interaction between the activation domain and an adjacent region of the DNA binding domain. Disruption of this interaction leads to complete loss of function in vivo, even though the activation domain is still able to bind to its target in the transcriptional machinery. We propose that this interaction parallels those between natural activation domains and …

Improved Vehicle Based Multibeam Bathymetry Using Sub-Maps And Slam, Christopher Roman, Hanumant Singh

Christopher N. Roman

This paper presents an algorithm to improve sub-sea acoustic multibeam bottom mapping based on the simultaneous mapping and localization (SLAM) methodology. Multibeam bathymetry from underwater water vehicles can yield valuable large scale terrain maps of the sea door, but the overall accuracy of these maps is typically limited by the accuracy of the vehicle position estimates. The solution presented here uses small bathymetric patches created over short time scales in a sub-mapping context. These patches are registered with respect to one another and assembled in a single coordinate frame to produce a more accurate terrain estimate and provide improved renavigation …

Using Containers To Enforce Smart Constraints For Performance In Industrial Systems, Scott A. Hissam, Gabriel A. Moreno, Kurt C. Wallnau

Gabriel A. Moreno

Criteria Analysis And Validation Of The Reliability Of Web Services-Oriented Systems,, Jia Zhang, Liang-Jie Zhang

Jia Zhang

No abstract provided.

Bridging Units And Business Incubation In A Technology Research Lab, Arcot Desai Narasimhalu

Arcot Desai NARASIMHALU

This paper describes a new model of incubation practices at Singapore’s Kent Ridge Digital Labs from 1998 till 2002. The model deviates from previously known models where by research institutions including institutions of higher learning license their technologies to companies or entrepreneurs who wished to either productize the technology or start a new company using the technology. The model was successfully applied towards the creation of more than fifteen start ups. These start ups attracted significant investments from venture capitalists from Singapore and elsewhere. Several of these companies are still in business.

Polymers With Pendant Coumarins: Synthesis And Characterization Of Polystyrenes And Polymethacrylates With Pendant Coumarin Moieties, T. Christopher Corkery

Chris Corkery

No abstract provided.

Testing First: Emphasizing Testing In Early Programming Courses, Will Marrero, Amber Settle

Amber Settle

A Case For Exhaustive Optimization, Sanza Kazadi, Michele Lee, Lauren Lee

Sanza Kazadi

Decoherence As A Measure Of Entanglement, Padmanabhan Aravind, Denis Tolkunov, Vladimir Privman

Padmanabhan K. Aravind

For a solvable pure-decoherence model, we confirm by an explicit model calculation that the decay of entanglement of two state systems (two quibits) is approximately governed by the product of the suppression factors describing decoherence of the subsystems, provided that they are subject to uncorrelated sources of quantum noise. This demonstrates an important physical property that separated open quantum systems can evolve quantum mechanically on time scales larger than the times for which they remain entangled.

Compression Of Laser Radiation In Plasmas Using Electromagnetic Cascading, Serguei Y. Kalmykov, Gennady Shvets

Serge Youri Kalmykov

Compressing high-power laser beams in plasmas via generation of a coherent cascade of electromagnetic sidebands is described. The technique requires two copropagating beams detuned by a near-resonant frequency, \Omega < \omega_{p}. The ponderomotive force of the laser beat wave drives an electron plasma wave which modifies the refractive index of plasma so as to produce a periodic phase modulation of the laser field with the beat period t_b = 2\pi/\Omega. A train of chirped laser beat notes (each of duration t_b) is thus created. The group velocity dispersion of radiation in plasma can then compress each beat note to a few-laser-cycle duration. As a result, a train of sharp electromagnetic spikes separated in time by t_b is formed. Depending on the plasma and laser parameters, chirping and compression can be implemented either concurrently in the same plasma or sequentially in different plasmas.

The Air Is Always Cleaner On The Other Side: Race, Space, And Ambient Air Toxics Exposures In California, Manuel Pastor, Rachel Morello-Frosch, James Sadd

James Sadd

Environmental justice advocates have recently focused attention on cumulative exposure in minority neighborhoods due to multiple sources of pollution. This article uses U.S. EPA’s National Air Toxics Assessment (NATA) for 1996 to examine environmental inequality in California, a state that has been a recent innovator in environmental justice policy. We first estimate potential lifetime cancer risks from mobile and stationary sources. We then consider the distribution of these risks using both simple comparisons and a multivariate model in which we control for income, land use, and other explanatory factors, as well as spatial correlation. We find large racial disparities in …

Web Services Quality Testing, Jia Zhang, Liang-Jie Zhang

Jia Zhang

No abstract provided.

Innovation Cube: Triggers, Drivers And Enablers For Successful Innovations, Arcot Desai Narasimhalu

Arcot Desai NARASIMHALU

Research on innovation has explained the relationships between institutions of higher learning, companies and the markets from both market driven and resource driven perspectives. However, innovation still remains more of an art than a science. Key researchers have lamented that it is difficult for most companies to scan the market place to identify new innovation opportunities. This paper describes a framework called Innovation Cube that is the building block for helping companies identify new innovation opportunities. This cube is constructed using three attribute-pairs called drivers, triggers and enablers of innovation. The paper discusses examples of the types of innovations represented …

If F(X) =∫X2x F(T) Dt Is Constant, Must F(T) = C/T ?, Tian-Xiao He

Tian-Xiao He

No abstract provided.

Stationary States And Energy Cascades In Inelastic Gases, E. Ben-Naim, J. Machta

Eli Ben-Naim

We find a general class of nontrivial stationary states in inelastic gases where, due to dissipation, energy is transfered from large velocity scales to small velocity scales. These steady-states exist for arbitrary collision rules and arbitrary dimension. Their signature is a stationary velocity distribution f(v) with an algebraic high-energy tail, f(v) ~ v^{-sigma}. The exponent sigma is obtained analytically and it varies continuously with the spatial dimension, the homogeneity index characterizing the collision rate, and the restitution coefficient. We observe these stationary states in numerical simulations in which energy is injected into the system by infrequently boosting particles to high …

Strongly Coupled Large-Angle Stimulated Raman Scattering Of Short Laser Pulse In Plasma-Filled Capillary, Serguei Y. Kalmykov, Patrick Mora

Serge Youri Kalmykov

Strongly coupled large-angle stimulated Raman scattering sLA SRSd of a short intense laser pulse develops in a plane plasma-filled capillary differently than in a plasma with open boundaries. Coupling the laser pulse to a capillary seeds the LA SRS in the forward direction (scattering angle smaller than \pi / 2 ) and can thus produce a high instability level in the vicinity of the entrance plane. In addition, oblique mirror reflections off capillary walls partly suppress the lateral convection of scattered radiation and increase the growth rate of the SRS under arbitrary (not too small) angle. Hence, the saturated convective …

Citizen Based Public Health Surveillance, Monitoring And Post-Event Assessments, Thomas Lyons Carr Iii

Thomas Lyons (Thom) Carr III Appl.Sc., CEM

When a sudden on-set emergency or disaster affects a region or the whole country, communities and neighborhoods should plan for the possibility that emergency and other civic services will be disrupted and unavailable (District of Columbia 2003a, 2003b, 2004; Doyle 2004; Siskiyou County Public Health/NorCalBT.com 2004). The event may be severe enough that the routine public health surveillance and monitoring system will be disrupted or the system will not be able to provide data quickly enough to support state and local decisionmaking. A temporary post-disaster system should be planned for and implemented. The epidemiologist supporting the local decision makers must …

Chapter 12 - Part Ii: A New Way Of Thinking About Achieving And Preserving Peace, Raymond Wilson

Raymond Wilson

Transport Coefficients Of Titanium-Doped Sb2te3 Single Crystals., Č. Drašar, M. Steinhart, P. Lošťák, H.-K. Shin, Jeffrey Dyck, C. Uher

Jeffrey Dyck

Titanium-doped single crystals (cTi=0–2×1020atomscm−3) were prepared from the elements Sb, Ti, and Te of 5N purity by a modified Bridgman method. The obtained crystals were characterized by measurements of the temperature dependence of the electrical resistivity, Hall coefficient, Seebeck coefficient and thermal conductivity in the temperature range of 3–300K. It was observed that with an increasing Ti content in the samples the electrical resistivity, the Hall coefficient and the Seebeck coefficient increase. This means that the incorporation of Ti atoms into the Sb2Te3 crystal structure results in a decrease in the concentration of holes in the doped crystals. For the …

Maximizing The Chances Of A Color Match, Ramin Naimi, Roberto Pelayo

Ramin Naimi

No abstract provided.

The Synthesis Of Chiral Lactones From Racemic -Hydroxyamides Using The Amidase From Brevibacterium Sp. Strain R312, Thomas Goyne, Jennifer Yamaoka, Matthew Pridgeon, Kyle Miner, Stephen Taylor, Min-Ken Liao

Thomas Goyne

No abstract provided.

Using A Microplate Reader To Add A ‘Taste Of Research’ To An Undergraduate Biochemistry Teaching Laboratory, Thomas Goyne, Kasey Hammond, Kevin Mccusker, Jacob Riehm

Thomas Goyne

No abstract provided.

Keys To Successful Learning, Michael J. White, '09, Leah A. Nillas

Leah A. Nillas

A nationwide push for the use of technology has influenced classroom teaching in the United States. This study examined the use of technology in elementary classrooms. Specific aspects of technology such as PowerPoint and word processing were examined in relation to developing skills in writing. Data from 46 fifth and third grade students as well as self-evaluation interviews with teachers were used to understand the overall comprehensive value of technology in teaching how to write. I expect my results to support previous research findings which assert that using computer technology in writing motivates students to do better work and is …

Additivity Of Information Value In Two-Act Linear Loss Decisions With Normal Priors, Jeffrey Keisler

Jeffrey Keisler

For the two-act linear loss decision problem with normal priors, conditions are derived for which the expected value of perfect information about two independent risks is super-additive in value. Several applications show how a variety of decision problems can reduce to the canonical problem, and how the general results obtained here can be translated simply to prescriptions for specific situations.

The Importance Of Experimental Design In Proteomic Mass Spectrometry Experiments: Some Cautionary Tales, Jeffrey S. Morris, Jianhua Hu, Kevin R. Coombes, Keith A. Baggerly

Jeffrey S. Morris

Proteomic expression patterns derived from mass spectrometry have been put forward as potential biomarkers for the early diagnosis of cancer and other diseases. This approach has generated much excitement and has led to a large number of new experiments and vast amounts of new data. The data, derived at great expense, can have very little value if careful attention is not paid to the experimental design and analysis. Using examples from surfaceenhanced laser desorption/ionisation time-of-flight (SELDI-TOF) and matrix-assisted laser desorption–ionisation/time-of-flight (MALDI-TOF) experiments, we describe several experimental design issues that can corrupt a dataset. Fortunately, the problems we identify can be …

Low-Temperature Ferromagnetic Properties Of The Diluted Magnetic Semiconductor Sb2-X Crx Te3 ., Jeffrey Dyck, Č. Drašar, P. LošŤÁK, C. Uher

Jeffrey Dyck

We report on magnetic and electrical transport properties of Sb2-x Crx Te3 single crystals with 0⩽x⩽0.095 over temperatures from 2 K to 300 K . A ferromagnetic state develops in these crystals at low temperatures with Curie temperatures that are proportional to x (for x>0.014 ), attaining a maximum value of 20 K for x=0.095 . Hysteresis below TC for the applied field parallel to the c axis is observed in both magnetization and Hall-effect measurements. Magnetic as well as transport data indicate that Cr takes the 3+ (3 d3 ) valence state, substituting for antimony in the host …

The Ames Mer Microscopic Imager Toolkit, Randy Sargent, Matt Deans, Clay Kunz, Ken Herkenhoff

Randy Sargent

The Mars Exploration Rovers, spirit and opportunity, have spent several successful months on Mars, returning gigabytes of images and spectral data to scientists on Earth. One of the instruments on the MER rovers, the Athena microscopic imager (MI), is a fixed focus, megapixel camera providing a ±3mm depth of field and a 31×31 mm field of view at a working distance of 63 mm from the lens to the object being imaged. In order to maximize the science return from this instrument, we developed the Ames MI toolkit and supported its use during the primary mission. The MI toolkit is …