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Articles 1 - 30 of 156
Full-Text Articles in Physical Sciences and Mathematics
An Evaluation Of Decision Tree And Survival Analysis Techniques For Business Failure Prediction, Adrian Gepp
An Evaluation Of Decision Tree And Survival Analysis Techniques For Business Failure Prediction, Adrian Gepp
Adrian Gepp
Accurate business failure prediction models would be extremely valuable to many industry sectors, particularly in financial investment and lending. The potential value of such models has been recently emphasised by the extremely costly failure of high profile businesses in both Australia and overseas, such as HIH (Australia) and Enron (USA). Consequently, there has been a significant increase in interest in business failure prediction, from both industry and academia. Statistical models attempt to predict the failure or success of a business based on publicly available information about that business (or its industry and the overall economy), such as accounting ratios from …
Stressed Liquid-Crystal Optical Phased Array For Fast Tip-Tilt Wavefront Correction, Bin Wang, Guoqiang Zhang, Anatoliy Glushchenko, John L. West, Philip Bos, Paul F. Mcmanamon
Stressed Liquid-Crystal Optical Phased Array For Fast Tip-Tilt Wavefront Correction, Bin Wang, Guoqiang Zhang, Anatoliy Glushchenko, John L. West, Philip Bos, Paul F. Mcmanamon
Philip J. Bos
A liquid-crystal optical phased-array technology that uses stressed liquid crystals provides a new type of tip-tilt wavefront corrector. It demonstrates a very fast time response (10 kHz) and high beam-steering efficiency (similar to 91%). The new technology presented here will allow for a nonmechanical, high-speed correction with simple device construction.
Self Consistent Bathymetric Mapping Using Sub-Maps: Survey Results From The Tag Hydrothermal Structure, C. Roman, R. Reves-Sohn, H. Singh, S. Humphris
Self Consistent Bathymetric Mapping Using Sub-Maps: Survey Results From The Tag Hydrothermal Structure, C. Roman, R. Reves-Sohn, H. Singh, S. Humphris
Christopher N. Roman
The spatial resolution of microbathymetry maps created using robotic vehicles such as ROVs, AUVs and manned submersibles in the deep ocean is currently limited by the accuracy of the vehicle navigation data. Errors in the vehicle position estimate commonly exceed the ranging errors of the acoustic mapping sensor itself, which creates inconsistency in the map making process and produces artifacts that lower resolution and distort map integrity. We present a methodology for producing self-consistent maps and improving vehicle position estimation by exploiting accurate local navigation and utilizing terrain relative measurements. The complete map is broken down into individual "sub-maps'', which …
Optimization Of Electrode Alignment For Electrochemical Detection In Capillary Electrophoresis Using A Scanning Electrochemical Microscope, David Roach, Stephanie Hooper, Mark Anderson
Optimization Of Electrode Alignment For Electrochemical Detection In Capillary Electrophoresis Using A Scanning Electrochemical Microscope, David Roach, Stephanie Hooper, Mark Anderson
Mark R. Anderson
Electrochemical detection in capillary electrophoresis requires decoupling the voltage applied to the working electrode from the separation voltage applied across the capillary. End-capillary electrochemical detection achieves this by placing the electrode just outside the ground end of the separation capillary. Obtaining adequate signal-to-noise in this arrangement requires using small inner diameter capillaries. Decreasing the inner diameter of the separation capillary, however, increases the difficulty of aligning the microelectrode with the open end of the capillary. Using scanning electrochemical microscopy (SECM), the position of the capillary opening is determined while electroactive material is continuously emerging from the end of the capillary. …
The Centrality Of Awareness In The Formation Of User Behavioral Intention Toward Preventive Technologies In The Context Of Voluntary Use, Tamara Dinev, Qing Hu
The Centrality Of Awareness In The Formation Of User Behavioral Intention Toward Preventive Technologies In The Context Of Voluntary Use, Tamara Dinev, Qing Hu
Qing Hu
Little is known about user behavior toward what we call preventive computer technologies that have become increasingly important in the networked economy and society to secure data and systems from viruses, unauthorized access, disruptions, spyware, and similar harmful technologies. We present the results of a study of user behavior toward preventive technologies based on the frameworks of theory of planned behavior in the context of anti-spyware technologies. We find that the user awareness of the issues and threats from harmful technologies is a strong predictor of user behavioral intention toward the use of preventive technologies. In the presence of awareness, …
Biosecurity And The Role Of Statisticians, Ron Brookmeyer
Biosecurity And The Role Of Statisticians, Ron Brookmeyer
Ron Brookmeyer
No abstract provided.
Online Teaching Practices (Both Best And Worst), Michael Nelson, Bhagyavati, Gail Miles, Amber Settle, Dale Shaffer, Jake Watts, Robert P. Webber
Online Teaching Practices (Both Best And Worst), Michael Nelson, Bhagyavati, Gail Miles, Amber Settle, Dale Shaffer, Jake Watts, Robert P. Webber
Amber Settle
Thursday Test, Sid Twentythree
Thursday Test, Sid Twentythree
Sidney Twentythree Sr.
1,4-Dimethyl-1,4-Diazoniabicyclo[2.2.2]Octane Diiodide Acetonitrile Solvate, Daron E. Janzen, Paul C. Ewbank, Kent R. Mann
1,4-Dimethyl-1,4-Diazoniabicyclo[2.2.2]Octane Diiodide Acetonitrile Solvate, Daron E. Janzen, Paul C. Ewbank, Kent R. Mann
Daron E Janzen, Ph.D.
No abstract provided.
Scaling Laws For Rotating Rayleigh-Bénard Convection, Janet Scheel, M. Cross
Scaling Laws For Rotating Rayleigh-Bénard Convection, Janet Scheel, M. Cross
Janet D. Scheel
Numerical simulations of large aspect ratio, three-dimensional rotating Rayleigh-Bénard convection for no-slip boundary conditions have been performed in both cylinders and periodic boxes. We have focused near the threshold for the supercritical bifurcation from the conducting state to a convecting state exhibiting domain chaos. A detailed analysis of these simulations has been carried out and is compared with experimental results, as well as predictions from multiple scale perturbation theory. We find that the time scaling law agrees with the theoretical prediction, which is in contradiction to experimental results. We also have looked at the scaling of defect lengths and defect …
A Pair Of General Series-Transformation Formulas, Tian-Xiao He, Leetsch Hsu, Peter Shiue
A Pair Of General Series-Transformation Formulas, Tian-Xiao He, Leetsch Hsu, Peter Shiue
Tian-Xiao He
No abstract provided.
Network Structure And Inter-Organizational Knowledge Sharing Capability, Samaddar Subhashish, Jennifer Priestley
Network Structure And Inter-Organizational Knowledge Sharing Capability, Samaddar Subhashish, Jennifer Priestley
Jennifer L. Priestley
No abstract is currently available.
High-Efficiency, Liquid-Crystal-Based, Controllable Diffraction Grating, Yanli Zhang, Bin Wang, Philip J. Bos, Jennifer Colegrove, David B. Chung
High-Efficiency, Liquid-Crystal-Based, Controllable Diffraction Grating, Yanli Zhang, Bin Wang, Philip J. Bos, Jennifer Colegrove, David B. Chung
Philip J. Bos
We propose a new reflective liquid-crystal diffraction grating design attained by combining the use of a polymer wall to reduce the detrimental effect of the fringing electric field in a high-resolution grating and a quarterwave plate to make the device polarization independent. This design could offer significant performance advantages in a projection display system. Results of calculations are compared with experimental data. (c) 2005 Optical Society of America.
Building A Research Lab: An Experimental And Theoretical Study Of The Aeroacoustics Of External-Gas Flares, S. Andrews, Caroline Lubert
Building A Research Lab: An Experimental And Theoretical Study Of The Aeroacoustics Of External-Gas Flares, S. Andrews, Caroline Lubert
Caroline P Lubert
No abstract provided.
High-Resolution Sonar Surveying: Techniques And Strategies For Improved Micro-Bathymetic Mapping, Vicki Ferrini, D. Fornari, T. Shank, D. Kelley, M. Tivey, S. Carbotte, D. Glickson, C. Roman, A. Sterling
High-Resolution Sonar Surveying: Techniques And Strategies For Improved Micro-Bathymetic Mapping, Vicki Ferrini, D. Fornari, T. Shank, D. Kelley, M. Tivey, S. Carbotte, D. Glickson, C. Roman, A. Sterling
Christopher N. Roman
No abstract provided.
A Kinetic Study Of Arsenic Removal Using Iron Enhanced Activated Alumina, P. Dimick, Samuel Morton, A. Kney, A. Baker
A Kinetic Study Of Arsenic Removal Using Iron Enhanced Activated Alumina, P. Dimick, Samuel Morton, A. Kney, A. Baker
Samuel A Morton
No abstract provided.
An Investigation Into The Effects Of Salt Concentration On Surfactant Adsorption Using A Qcm, Samuel Morton, S. Ray, R. Counce
An Investigation Into The Effects Of Salt Concentration On Surfactant Adsorption Using A Qcm, Samuel Morton, S. Ray, R. Counce
Samuel A Morton
No abstract provided.
Simulation Of Ultrashort Laser Pulse Propagation With High-Order Dispersion, Raman Scattering, And Shock Formation, Jeremy Gulley, Erik Zeek, William Dennis
Simulation Of Ultrashort Laser Pulse Propagation With High-Order Dispersion, Raman Scattering, And Shock Formation, Jeremy Gulley, Erik Zeek, William Dennis
Jeremy R. Gulley
No abstract is currently available.
Building A Classification Cascade For Visual Identification From One Example, Andras Ferencz, Erik G. Learned-Miller, Jitendra Malik
Building A Classification Cascade For Visual Identification From One Example, Andras Ferencz, Erik G. Learned-Miller, Jitendra Malik
Erik G Learned-Miller
Object identification (OID) is specialized recognition where the category is known (e.g. cars) and the algorithm recognizes an object's exact identity (e.g. Bob's BMW). Two special challenges characterize OID. (1) Interclass variation is often small (many cars look alike) and may be dwarfed by illumination or pose changes. (2) There may be many classes but few or just one positive "training" examples per class. Due to (1), a solution must locate possibly subtle object-specific salient features (a door handle) while avoiding distracting ones (a specular highlight). However, (2) rules out direct techniques of feature selection. We describe an online algorithm …
Spatial Sampling Design For Parameter Estimation Of The Covariance Function, Zhengyuan Zhu, Michael L. Stein
Spatial Sampling Design For Parameter Estimation Of The Covariance Function, Zhengyuan Zhu, Michael L. Stein
Zhengyuan Zhu
Graduate Student Satisfaction With An Online Discrete Mathematics Course, Amber Settle, Chad Settle
Graduate Student Satisfaction With An Online Discrete Mathematics Course, Amber Settle, Chad Settle
Amber Settle
Can A Divorced Mom/Dad Take Care Of The Child?, Vijay Dialani
Can A Divorced Mom/Dad Take Care Of The Child?, Vijay Dialani
Vijay Dialani
The Future Of Journal Publishing, Gordon C. Tibbitts
The Future Of Journal Publishing, Gordon C. Tibbitts
Gordon C. Tibbitts III
The seminar helped publishing neophytes understand where they can add value. It also focused on the challenges of the day and likely challenges in the future. Some predictions include a complete move to e-journals, article-at-a-time publishing, an increase in "meta" articles, and the demise of general search engine prominence.
First Glimpse Results On The Stellar Structure Of The Galaxy., R. A. Benjamin, E. Churchwell, B. L. Babler, R. Indebetouw, M. R. Meade, B. A. Whitney, C. Watson, M. G. Wolfire, M. J. Wolff, R. Ignace, T. M. Bania, S. Bracker, D. P. Clemens, L. Chomiuk, M. Cohen, J. M. Dickey, J. M. Jackson, H. A. Kobulnicky, E. P. Mercer, J. S. Mathis, S. R. Stolovy, B. Uzpen
First Glimpse Results On The Stellar Structure Of The Galaxy., R. A. Benjamin, E. Churchwell, B. L. Babler, R. Indebetouw, M. R. Meade, B. A. Whitney, C. Watson, M. G. Wolfire, M. J. Wolff, R. Ignace, T. M. Bania, S. Bracker, D. P. Clemens, L. Chomiuk, M. Cohen, J. M. Dickey, J. M. Jackson, H. A. Kobulnicky, E. P. Mercer, J. S. Mathis, S. R. Stolovy, B. Uzpen
Richard Ignace
The GLIMPSE (Galactic Legacy Mid-Plane Survey Extraordinaire) Point Source Catalog of ~ 30 million mid-infrared sources towards the inner Galaxy, 10 < |l| < 65 degrees and |b| < 1 degree, was used to determine the distribution of stars in Galactic longitude, latitude, and apparent magnitude. The counts versus longitude can be approximated by the modified Bessel function N=N_0*(l/l_0)*K_1(l/l_0), where l_0 is insensitive to limiting magnitude, band choice, and side of Galactic center: l_0= 17-30 degrees with a best fit value in the the 4.5 micron band of l_0=24 +/- 4 degrees. Modeling the source distribution as an exponential disk yields a radial scale length of H= 3.9 +/- 0.6 kpc. There is a pronounced north-south asymmetry in source counts for |l| < 30 degrees, with ~ 25% more stars in the north. For l=10-30 degrees, there is a strong enhancement of stars of m= 11.5-13.5 mag. A linear bar passing through the Galactic center with half-length R_bar=4.4 +/- 0.5 kpc, tilted by phi=44 +/- 10 degrees to the Sun-Galactic Center line, provides the simplest interpretation of this data. We examine the possibility that enhanced source counts at l=26-28 degrees, 31.5-34 degrees, and 306-309 degrees are related to Galactic spiral structure. Total source counts are depressed in regions where the counts of red objects (m_K-m_[8.0] >3) peak. In these areas, the counts are reduced by extinction due to molecular gas and/or high diffuse backgrounds associated with star formation.
A Framework To Ensure Trustworthy Web Services, Jia Zhang, Liang-Jie Zhang
A Framework To Ensure Trustworthy Web Services, Jia Zhang, Liang-Jie Zhang
Jia Zhang
No abstract provided.
Policies And Guidelines Related To Sustainable Land Management In Jordan, Raed Al-Tabini, M. Shatanawi, J. Al-Bakri
Policies And Guidelines Related To Sustainable Land Management In Jordan, Raed Al-Tabini, M. Shatanawi, J. Al-Bakri
Raed Al-Tabini
No abstract provided.
Numb3rs: The Intersection Between Mathematics And Hollywood Is Not Empty, Ron Buckmire
Numb3rs: The Intersection Between Mathematics And Hollywood Is Not Empty, Ron Buckmire
Ron Buckmire
No abstract provided.
Defect Structure Of Sb2−Xmnxte3 Single Crystals., Jaromír Horák, Petr LošŤÁK, Čestmír Drašar, Jeffrey Dyck, Zengzua Zhou, Cterid Uher
Defect Structure Of Sb2−Xmnxte3 Single Crystals., Jaromír Horák, Petr LošŤÁK, Čestmír Drašar, Jeffrey Dyck, Zengzua Zhou, Cterid Uher
Jeffrey Dyck
Incorporation of the transition metal elements in the tetradymite structure of Sb2Te3 has a strong influence on electronic properties. Recent studies have indicated that Mn substitutes on the Sb sublattice increases the carrier concentration of holes. However, the doping efficiency of Mn appears rather low in comparison to what it should be based on the measurements of magnetization, structural analysis, and transport properties. In this paper we address this issue by making detailed studies of the Hall effect and electrical resistivity and we explain the results with the aid of a model that takes into account interactions of the Mn …
Graduate Colloquium, Borbala Mazzag
Root Causes Of Lost Time And User Stress In A Simple Dialog System, Nigel Ward, Anais Rivera, Karen Ward, David G. Novick
Root Causes Of Lost Time And User Stress In A Simple Dialog System, Nigel Ward, Anais Rivera, Karen Ward, David G. Novick
David G. Novick
As a priority-setting exercise, we compared interactions between users and a simple spoken dialog system to interactions between users and a human operator. We observed usability events, places in which system behavior differed from human behavior, and for each we noted the impact, root causes, and prospects for improvement. We suggest some priority issues for research, involving not only such core areas as speech recognition and synthesis and language understanding and generation, but also less-studied topics such as adaptive or flexible timeouts, turn-taking and speaking rate.