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Articles 1081 - 1110 of 5872
Full-Text Articles in Physical Sciences and Mathematics
Occurrence Of Sulfonamide Antimicrobials In Private Water Wells In Washington County, Idaho, Usa, Angela L. Batt, Daniel D. Snow, Diana S. Aga
Occurrence Of Sulfonamide Antimicrobials In Private Water Wells In Washington County, Idaho, Usa, Angela L. Batt, Daniel D. Snow, Diana S. Aga
Nebraska Water Center: Faculty Publications
County (Weiser, Idaho) were collected to assess the impact of a nearby confined animal feeding operation (CAFO) on the quality of the local groundwater. All six samples were found contaminated by two veterinary antimicrobials, sulfamethazine (at concentrations from 0.076 to 0.22 μg/l) and sulfadimethoxine (at concentrations from 0.046 to 0.068 μg/l). These groundwater samples also contained elevated concentrations of nitrate and ammonium. Three of the sampled wells have nitrate levels that exceeded the maximum contaminant level set by the US Environmental Protection Agency for drinking water, with nitrate concentration as high as 39.1 mg/l. All but one well showed nitrate, …
Robustness With Respect To Sampling For Stabilization Of Riesz Spectral Systems, Richard Rebarber, Stuart Townley
Robustness With Respect To Sampling For Stabilization Of Riesz Spectral Systems, Richard Rebarber, Stuart Townley
Department of Mathematics: Faculty Publications
We suppose that a continuous-time feedback is input–output stabilizing for an infinite-dimensional system. We address the question of whether the sampled-data controller obtained by applying idealized sample-and-hold to this continuous-time feedback is also input–output stabilizing if the sampling time is small enough. This question has been previously addressed for fairly general systems under various conditions. In this note, we restrict our attention to Riesz spectral systems, for which we generalize the existing results. Specifically, we give two relatively simple conditions which, combined, are sufficient for the sampled-data controller to be stabilizing. The first condition is a spectrum decomposition for the …
Necessary Conditions In Multiobjective Optimization With Equilibrium Constraints, Truong Q. Bao, Panjak Gupta, Boris S. Mordukhovich
Necessary Conditions In Multiobjective Optimization With Equilibrium Constraints, Truong Q. Bao, Panjak Gupta, Boris S. Mordukhovich
Mathematics Research Reports
In this paper we study multiobjective optimization problems with equilibrium constraints (MOECs) described by generalized equations in the form 0 is an element of the set G(x,y) + Q(x,y), where both mappings G and Q are set-valued. Such models particularly arise from certain optimization-related problems governed by variational inequalities and first-order optimality conditions in nondifferentiable programming. We establish verifiable necessary conditions for the general problems under consideration and for their important specifications using modern tools of variational analysis and generalized differentiation. The application of the obtained necessary optimality conditions is illustrated by a numerical example from bilevel programming with convex …
Composition Operators With Maximal Norm On Weighted Bergman Spaces, Brent J. Carswell, Christopher Hammond
Composition Operators With Maximal Norm On Weighted Bergman Spaces, Brent J. Carswell, Christopher Hammond
Mathematics Faculty Publications
We prove that any composition operator with maximal norm on one of the weighted Bergman spaces is induced by a disk automorphism or a map that fixes the origin. This result demonstrates a major difference between the weighted Bergman spaces and the Hardy space H2, where every inner function induces a composition operator with maximal norm.
Energy Levels And Transition Probabilities For Boron-Like Fe Xxii, V. Jonauskas, P. Bogdanovich, F. P. Keenan, R. Kisielius, M. E. Foord, R. F. Heeter, S. J. Rose, Gary J. Ferland, P. H. Norrington
Energy Levels And Transition Probabilities For Boron-Like Fe Xxii, V. Jonauskas, P. Bogdanovich, F. P. Keenan, R. Kisielius, M. E. Foord, R. F. Heeter, S. J. Rose, Gary J. Ferland, P. H. Norrington
Physics and Astronomy Faculty Publications
The Multiconfiguration Dirac-Fock method is used to calculate the energies of the 407 lowest levels in FeXXII. These results are cross-checked using a suite of codes which employ the configuration interaction method on the basis set of transformed radial orbitals with variable parameters, and takes into account relativistic corrections in the Breit-Pauli approximation. Transition probabilities, oscillator and line strengths are presented for electric dipole (E1), electric quadrupole (E2) and magnetic dipole (M1) transitions among these levels. The total radiative transition probabilities, as well as the five largest values from each level be it of E1, M1, E2, M2, or E3 …
Size And Properties Of The Narrow-Line Region In Seyfert-1 Galaxies From Spatially-Resolved Optical Spectroscopy, N. Bennert, B. Jungwiert, S. Komossa, M. Hass, R. Chini
Size And Properties Of The Narrow-Line Region In Seyfert-1 Galaxies From Spatially-Resolved Optical Spectroscopy, N. Bennert, B. Jungwiert, S. Komossa, M. Hass, R. Chini
Physics
Context.Spatially resolved emission-line spectroscopy is a powerful tool for determining the physical conditions in the narrow-line region (NLR) of active galactic nuclei (AGNs). We recently used optical long-slit spectroscopy to study the NLRs of a sample of six Seyfert-2 galaxies. We have shown that such an approach, in comparison to the commonly used [ ] narrow-band imaging alone, allows us to probe the size of the NLR in terms of AGN photoionisation. Moreover, several physical parameters of the NLR can be directly accessed. Aims.We here apply the same methods to study the NLR of six Seyfert-1 galaxies and …
Size And Properties Of The Narrow-Line Region In Seyfert-2 Galaxies From Spatially-Resolved Optical Spectroscopy, N. Bennert, B. Jungwiert, S. Komossa, M. Haas, R. Chini
Size And Properties Of The Narrow-Line Region In Seyfert-2 Galaxies From Spatially-Resolved Optical Spectroscopy, N. Bennert, B. Jungwiert, S. Komossa, M. Haas, R. Chini
Physics
Context. While [O III] narrow-band imaging is commonly used to measure the size of the narrow-line regions (NLRs) in active galactic nuclei (AGNs), it can be contaminated by emission from surrounding starbursts. Recently, we have shown that long-slit spectroscopy provides a valuable alternative approach to probe the size in terms of AGN photoionisation. Moreover, several parameters of the NLR can be directly accessed. Aims. We here apply the same methods developed and described for the Seyfert-2 galaxy NGC 1386 to study the NLR of five other Seyfert-2 galaxies by using high-sensitivity spatially-resolved optical spectroscopy obtained at the VLT and the …
New Cuoricino Results On The Way To Cuore, P Gorla, F Alessandria, R Ardito, C Arnaboldi, Dr Artusa, Ft Avignone Iii, M Balata, I Bandac, M Barucci, Jw Beeman, F Bellini, C Brofferio, C Bucci, S Capelli, L Carbone, S Cebrian, M Clemenza, C Cosmelli, O Cremonesi, Rj Creswick, I Dafinei, S Di Domizio, M Diemoz, Mj Dolinski, Ha Farach, F Ferroni, E Fiorini, Sj Freedman, C Gargiulo, A Giachero, E Guardincerri, A Giuliani, Td Gutierrez, Ee Haller, K Heeger, Ig Irastorza, E Longo, G Maier, R Maruyama, S Morganti, S Nisi, C Nones, Eb Norman, A Nucciotti, P Ottonello, M Pallavicini, V Palmieri, M Pavan, M Pedretti, G Pessina, S Pirro, E Previtali, L Risegari, C Rosenfeld, S Sangiorgio, M Sisti, Ar Smith, L Torres, G Ventura, M Vignati, N Xu, L Zanotti
New Cuoricino Results On The Way To Cuore, P Gorla, F Alessandria, R Ardito, C Arnaboldi, Dr Artusa, Ft Avignone Iii, M Balata, I Bandac, M Barucci, Jw Beeman, F Bellini, C Brofferio, C Bucci, S Capelli, L Carbone, S Cebrian, M Clemenza, C Cosmelli, O Cremonesi, Rj Creswick, I Dafinei, S Di Domizio, M Diemoz, Mj Dolinski, Ha Farach, F Ferroni, E Fiorini, Sj Freedman, C Gargiulo, A Giachero, E Guardincerri, A Giuliani, Td Gutierrez, Ee Haller, K Heeger, Ig Irastorza, E Longo, G Maier, R Maruyama, S Morganti, S Nisi, C Nones, Eb Norman, A Nucciotti, P Ottonello, M Pallavicini, V Palmieri, M Pavan, M Pedretti, G Pessina, S Pirro, E Previtali, L Risegari, C Rosenfeld, S Sangiorgio, M Sisti, Ar Smith, L Torres, G Ventura, M Vignati, N Xu, L Zanotti
Physics
CUORE is a 0.75 ton experiment to search for neutrinoless double beta decay of Te130 using 988 TeO2 bolometers. It aims at reaching a sensitivity on the effective neutrino mass of the order of few tens of meV. CUORICINO, a single CUORE tower running since 2003, plays an important role as a stand alone experiment and for developing the future CUORE setup. Present results already achieved and studies that are underway are here presented and discussed.
Illustrating Physics With Ray-Traced Computer Graphics, Thomas J. Bensky
Illustrating Physics With Ray-Traced Computer Graphics, Thomas J. Bensky
Physics
This paper provides a brief introduction to using ray-traced computer graphics for creating illustrations to be used in physics teaching. The article focuses on Povray, a freely available ray-tracing software program. We have found that a ray-traced illustration produced with this software provides a final-image quality that is far superior to hand-drawn illustrations and those produced using standard click-and-draw computer drawing software. Techniques for illustrating time-dependent scenarios are discussed as well.
A Stochastic Model For Psa Levels: Behavior Of Solutions And Population Statistics, Pavel Bělík, P W A Dayananda, John T. Kemper, Mikhail M. Shvartsman
A Stochastic Model For Psa Levels: Behavior Of Solutions And Population Statistics, Pavel Bělík, P W A Dayananda, John T. Kemper, Mikhail M. Shvartsman
Faculty Authored Articles
This paper investigates the partial differential equation for the evolving distribution of prostate-specific antigen (PSA) levels following radiotherapy. We also present results on the behavior of moments for the evolving distribution of PSA levels and estimate the probability of long-term treatment success and failure related to values of treatment and disease parameters. Results apply to a much wider range of parameter values than was considered in earlier studies, including parameter combinations that are patient specific.
Five-Year Watershed Action Plan For The Taunton River Watershed, Geosyntec Consultants
Five-Year Watershed Action Plan For The Taunton River Watershed, Geosyntec Consultants
Reference Documents
No abstract provided.
Comparison Of Tropospheric Ozone Columns Calculated From Mls, Omi, And Ozonesonde Data, Gary A. Morris, Bojan Bojkov, Mark R. Schoeberl, Amy Wozniak, Jerry Ziemke, Sushil Chandra, Jack Fishman, Ivanka Stajner
Comparison Of Tropospheric Ozone Columns Calculated From Mls, Omi, And Ozonesonde Data, Gary A. Morris, Bojan Bojkov, Mark R. Schoeberl, Amy Wozniak, Jerry Ziemke, Sushil Chandra, Jack Fishman, Ivanka Stajner
Physics and Astronomy Faculty Presentations
This poster shows a comparison of three derived tropospheric ozone residual (TOR) products with integrated tropospheric ozone columns from ozonesonde profile: (1) the method of Ziemke et al. (2006), (2) a modified version of Fishman et al. (2003), and (3) a trajectory mapping approach. In each case, MLS ozone profiles are integrated to the tropopause and subtracted from OMI (TOMS retrieval) total column ozone. The effectiveness of each of these techniques is examined as a function of latitude, time, and geographic region. In general, we find good agreement between the derived products and the ozonesondes, with the Fishman et al. …
Demographic Change And Response: Social Context And The Practice Of Birth Control In Six Countries, Sangeeta Parashar, Harriet B. Presser, Megan L. Klein Hattori, Sara Raley, Zhihong Sa
Demographic Change And Response: Social Context And The Practice Of Birth Control In Six Countries, Sangeeta Parashar, Harriet B. Presser, Megan L. Klein Hattori, Sara Raley, Zhihong Sa
Department of Sociology Faculty Scholarship and Creative Works
This paper expands on Kingsley Davis’s demographic thesis of change and re- sponse. Specifically, we consider the social context that accounts for the primacy of particular birth control methods that bring about fertility change during specific time periods. We examine the relevance of state policy (including national family planning programs), the international population establishment, the medical profession, organized religion, and women’s groups using case studies from Japan, Russia, Puerto Rico, China, India, and Cameroon. Some of these countries are undergoing the second demographic transition, others the first. Despite variations in context, heavy reliance on sterilization and/or abortion as a means …
Tris(1,9-Diethyladeninium) Triiodide Diiodide, Elizabeth F. Day, Norman S. Dean, Andreas H. Franz
Tris(1,9-Diethyladeninium) Triiodide Diiodide, Elizabeth F. Day, Norman S. Dean, Andreas H. Franz
College of the Pacific Faculty Articles
X-ray analysis of the title compound reveals three crystallographically distinct cations of 1,9-diethyladeninium, two iodide anions and one triiodide anion in the asymmetric unit, giving six residues and the formula 3C9H14N5+·I3-·2I-. Standard purine nomenclature is used to identify the atoms of each adenine moiety. Hydrogen bonding is observed between atoms N6 and N7 of a pair of cations [N...N = 2.885 (4)/2.902 (3) and 2.854 (3)/2.854 (3) Å], with additional hydrogen bonding to I- anions via the other N6 H atom [N...I = 3.708 (3), 3.738 (3) and 3.638 (3) Å]. The triiodide anion is not involved in hydrogen bonding. …
Refuge Update – September/October 2006, Volume 3, Number 5
Refuge Update – September/October 2006, Volume 3, Number 5
RefugeUpdate (USFWS-NWRS)
Table of Contents:
Birds On Every Refuge, page 5 New Refuge System Birding Initiative aims to help birders fully appreciate the importance of refuges in the lives of their favorite species.
Focus on . . Farm Bill, pages 10-16 America’s farmers and ranchers play a critical role in sustaining healthy fi sh and wildlife populations, making the Farm Bill an especially important issue.
Where Has All the Cordgrass Gone, page 21 Sudden wetland dieback is the rapid loss of vegetation in salt marshes. So, why does it happen?
Less Than “Purr-Fect” in the Wild, page 26 Feral cars threaten birds …
Single-Crystal, Polarized, Raman Scattering Study Of The Molecular And Lattice Vibrations For The Energetic Material Cyclotrimethylene Trinitramine, James C. Haycraft, Lewis L. Stevens, Craig J. Eckhardt
Single-Crystal, Polarized, Raman Scattering Study Of The Molecular And Lattice Vibrations For The Energetic Material Cyclotrimethylene Trinitramine, James C. Haycraft, Lewis L. Stevens, Craig J. Eckhardt
Craig J. Eckhardt Publications
The single-crystal, polarized, Raman spectra for cyclotrimethylene trinitramine (RDX) have been studied at room temperature and pressure over the region of 5–3400 cm-1. While the observed Raman bands agree well with a previous Raman study, this work provides a consistent interpretation of the Raman spectra by assignment of fundamental modes, overtones, and combination bands. A total of 56 internal vibrations were observed, 36 of which were labeled as fundamental molecular vibrations. In addition, all 24 lattice optical phonons are identified. All six possible polarizations were probed to obtain the Ag, B1g, B2 …
“Reductive Ozonolysis” Via A New Fragmentation Of Carbonyl Oxides, Chris Schwartz, Joseph Raible, Kyle Mott, Patrick Dussault
“Reductive Ozonolysis” Via A New Fragmentation Of Carbonyl Oxides, Chris Schwartz, Joseph Raible, Kyle Mott, Patrick Dussault
Patrick Dussault Publications
This account describes the development of methodologies for ‘reductive’ ozonolysis, the direct ozonolytic conversion of alkenes into carbonyl groups without the intermediacy of 1,2,4-trioxolanes (ozonides). Ozonolysis of alkenes in the presence of DMSO produces a mixture of aldehyde and ozonide. The combination of DMSO and Et3N results in improved yields of carbonyls but still leaves unacceptable levels of residual ozonides; similar results are obtained using secondary or tertiary amines in the absence of DMSO. The influence of amines is believed to result from conversion to the corresponding N-oxides; ozonolysis in the presence of amine N-oxides efficiently …
Interlayer Exchange Coupling In Fe/Mgo/Fe Magnetic Tunnel Junctions, T. Katayama, S. Yuasa, Julian P. Velev, M. Ye. Zhuravlev, Sitaram S. Jaswal, Evgeny Y. Tsymbal
Interlayer Exchange Coupling In Fe/Mgo/Fe Magnetic Tunnel Junctions, T. Katayama, S. Yuasa, Julian P. Velev, M. Ye. Zhuravlev, Sitaram S. Jaswal, Evgeny Y. Tsymbal
Evgeny Tsymbal Publications
Interlayer exchange coupling (IEC) in fully epitaxial Fe/MgO/Fe (001) tunnel junctions with wedge-shaped MgO layers is measured at room temperature from the unidirectional shift of the Kerr hysteresis loop. It is found that the IEC is antiferromagnetic for small MgO thickness but changes sign at 0.8 nm. Ab initio calculations of IEC show that this behavior can be explained by the presence of O vacancies in the MgO barrier which makes IEC antiferromagnetic for thin barriers. With increasing MgO thickness the resonance contribution to IEC from localized defect states is reduced resulting in the ferromagnetic coupling typical for perfect MgO …
Comparison Of Tropospheric Ozone Columns Calculated From Mls, Omi, And Ozonesonde Data, Gary A. Morris, Bojan Bojkov, Mark R. Schoeberl, Amy Wozniak, Jerry Ziemke, Sushil Chandra, Jack Fishman, Ivanka Stajner
Comparison Of Tropospheric Ozone Columns Calculated From Mls, Omi, And Ozonesonde Data, Gary A. Morris, Bojan Bojkov, Mark R. Schoeberl, Amy Wozniak, Jerry Ziemke, Sushil Chandra, Jack Fishman, Ivanka Stajner
Gary A. Morris
This poster shows a comparison of three derived tropospheric ozone residual (TOR) products with integrated tropospheric ozone columns from ozonesonde profile: (1) the method of Ziemke et al. (2006), (2) a modified version of Fishman et al. (2003), and (3) a trajectory mapping approach. In each case, MLS ozone profiles are integrated to the tropopause and subtracted from OMI (TOMS retrieval) total column ozone. The effectiveness of each of these techniques is examined as a function of latitude, time, and geographic region. In general, we find good agreement between the derived products and the ozonesondes, with the Fishman et al. …
Statistical Learning Of Origin-Specific Statically Optimal Individualized Treatment Rules, Mark J. Van Der Laan, Maya L. Petersen
Statistical Learning Of Origin-Specific Statically Optimal Individualized Treatment Rules, Mark J. Van Der Laan, Maya L. Petersen
U.C. Berkeley Division of Biostatistics Working Paper Series
Consider a longitudinal observational or controlled study in which one collects chronological data over time on n randomly sampled subjects. The time-dependent process one observes on each randomly sampled subject contains time-dependent covariates, time-dependent treatment actions, and an outcome process or single final outcome of interest. A statically optimal individualized treatment rule (as introduced in van der Laan, Petersen & Joffe (2005), Petersen & van der Laan (2006)) is a (unknown) treatment rule which at any point in time conditions on a user-supplied subset of the past, computes the future static treatment regimen that maximizes a (conditional) mean future outcome …
Structure Effects Of Benzene Hydrogenation Studied With Sum Frequency Generation Vibrational Spectroscopy And Kinetics On Pt(111) And Pt(100) Single-Crystal Surfaces, Kaitlin M. Bratlie, Christopher J. Kliewer, Gabor A. Somorjai
Structure Effects Of Benzene Hydrogenation Studied With Sum Frequency Generation Vibrational Spectroscopy And Kinetics On Pt(111) And Pt(100) Single-Crystal Surfaces, Kaitlin M. Bratlie, Christopher J. Kliewer, Gabor A. Somorjai
Kaitlin M. Bratlie
Sum frequency generation (SFG) surface vibrational spectroscopy and kinetic measurements using gas chromatography have identified at least two reaction pathways for benzene hydrogenation on the Pt(100) and Pt(111) single-crystal surfaces at Torr pressures. Kinetic studies at low temperatures (310-370 K) show that benzene hydrogenation does not proceed through cyclohexene. A Langmuir-Hinshelwood-type rate law for the low-temperature reaction pathway is identified. The rate-determining step for this pathway is the addition of the first hydrogen atom to adsorbed benzene for both single-crystal surfaces, which is verified by the spectroscopic observation of adsorbed benzene at low temperatures on both the Pt(100) and Pt(111) …
Posterminaries: The Scales Of Judgement, Alexander H. King
Posterminaries: The Scales Of Judgement, Alexander H. King
Alexander H. King
Materials scientists are generally well-versed in physics, and physics, above all, is a science of measurements. The first instinct of a physicist is to parse a problem in terms of its measurables in the dimensions of mass, length, and time, and it is the shifting of attention down the scale of length that particularly characterizes our present times as the Nano Age.
N-(2-Aminobenzyl)-N,N-Bis(Quinolin- 2-Ylmethyl)Amine, Abhijit Mitra, Pamela J. Seaton, Kraig A. Wheeler
N-(2-Aminobenzyl)-N,N-Bis(Quinolin- 2-Ylmethyl)Amine, Abhijit Mitra, Pamela J. Seaton, Kraig A. Wheeler
Kraig A. Wheeler
The title new diquinaldine derivative, C27H24N4, forms molecular assemblies organized by intermolecular quinoline π–π stacking [3.356 (3) and 3.440 (3) Å] and both inter- and intramolecular N—H⋯N hydrogen bonds [3.039 (3)–3.104 (3) Å and 129 (2)–172 (2)°]. The combination of such interactions provides readily definable contacts that propagate along each crystallographic axis.
Congruences For The Coefficients Of Weakly Holomorphic Modular Forms, Stephanie Treneer
Congruences For The Coefficients Of Weakly Holomorphic Modular Forms, Stephanie Treneer
Mathematics Faculty Publications
Recent works have used the theory of modular forms to establish linear congruences for the partition function and for traces of singular moduli. We show that this type of phenomenon is completely general, by finding similar congruences for the coefficients of any weakly holomorphic modular form on any congruence subgroup Γ0 (N). In particular, we give congruences for a wide class of partition functions and for traces of CM values of arbitrary modular functions on certain congruence subgroups of prime level.
Inventory And Monitoring Of Aquatic Bird Species On Lakes Mead And Mohave 2004 - 2006, Joseph Barnes
Inventory And Monitoring Of Aquatic Bird Species On Lakes Mead And Mohave 2004 - 2006, Joseph Barnes
Wildlife Monitoring
This project was completed as part of a task agreements awarded by the National Park Service (NPS), Lake Mead National Recreation Area (LAME), to the Public Lands Institute (PLI) at the University of Nevada, Las Vegas (UNLV). This final report was completed under a task agreement ending on September 30, 2006, and was completed in support of an NPS project funded by the Southern Nevada Public Lands Management Act (PLMA) to inventory and monitor shoreline and near-shore natural resources on Lakes Mead and Mohave (DOI 2005). This report details inventory and monitoring efforts on shoreline and aquatic bird species between …
Precarious Rock Methodology For Seismic Hazard: Physical Testing, Numerical Modeling And Coherence Studies, Rasool Anooshehpoor, Matthew D. Purvance, James N. Brune, Leiph A. Preston, John G. Anderson, Ken Smith, Amy J. Smiecinski
Precarious Rock Methodology For Seismic Hazard: Physical Testing, Numerical Modeling And Coherence Studies, Rasool Anooshehpoor, Matthew D. Purvance, James N. Brune, Leiph A. Preston, John G. Anderson, Ken Smith, Amy J. Smiecinski
Publications (YM)
This report covers the following projects: Shake table tests of precarious rock methodology, field tests of precarious rocks at Yucca Mountain and comparison of the results with PSHA predictions, study of the coherence of the wave field in the ESF, and a limited survey of precarious rocks south of the proposed repository footprint. A series of shake table experiments have been carried out at the University of Nevada, Reno Large Scale Structures Laboratory. The bulk of the experiments involved scaling acceleration time histories (uniaxial forcing) from 0.1g to the point where the objects on the shake table overturned a specified …
Using Computational Methods To Reinvigorate An Undergraduate Physics Curriculum, Jaime R. Taylor, B. A. King Iii
Using Computational Methods To Reinvigorate An Undergraduate Physics Curriculum, Jaime R. Taylor, B. A. King Iii
Physics Faculty Research
Austin Peay State University's Department of Physics and Astronomy has reinvigorated its physics program by adding a required computational methods class and small computational components to classes across its curriculum. A front-to-back problem management approach has required a change in the way the department assesses students' performance.
A Rough Guide To Interdisciplinarity: Graduate Student Perspectives, Jessica K. Graybill, Sarah Dooling, Vivek Shandas, John Withey, Adrienne I. Greve, Gregory L. Simon
A Rough Guide To Interdisciplinarity: Graduate Student Perspectives, Jessica K. Graybill, Sarah Dooling, Vivek Shandas, John Withey, Adrienne I. Greve, Gregory L. Simon
Institute for Sustainable Solutions Publications and Presentations
A widely held belief is that only through interdisciplinarity can academics effectively address today's complex ecological problems, because these problems demand cross-disciplinary efforts and specialized knowledge from natural and social scientists. Innovative interdisciplinary research and curricula have been created to train a new generation of scientists to engage with complex issues. It seems critical that those most affected by interdisciplinary education—doctoral students—provide feedback about such innovations. Without understanding students' experiences in interdisciplinary programs, faculty will not know whether they are "getting it right" for future generations of interdisciplinarians. From our experiences as doctoral students, we provide reflections and perspectives on …
Digital Image Ballistics From Jpeg Quantization, Hany Farid
Digital Image Ballistics From Jpeg Quantization, Hany Farid
Computer Science Technical Reports
Most digital cameras export images in the JPEG file format. This lossy compression scheme employs a quantization table that controls the amount of compression achieved. Different cameras typically employ different tables. A comparison of an image's quantization scheme to a database of known cameras affords a simple technique for confirming or denying an image's source. Similarly, comparison to a database of photo-editing software can be used in a forensic setting to determine if an image was edited after its original recording.
Tools And Algorithms To Advance Interactive Intrusion Analysis Via Machine Learning And Information Retrieval, Javed Aslam, Sergey Bratus, Virgil Pavlu
Tools And Algorithms To Advance Interactive Intrusion Analysis Via Machine Learning And Information Retrieval, Javed Aslam, Sergey Bratus, Virgil Pavlu
Computer Science Technical Reports
We consider typical tasks that arise in the intrusion analysis of log data from the perspectives of Machine Learning and Information Retrieval, and we study a number of data organization and interactive learning techniques to improve the analyst's efficiency. In doing so, we attempt to translate intrusion analysis problems into the language of the abovementioned disciplines and to offer metrics to evaluate the effect of proposed techniques. The Kerf toolkit contains prototype implementations of these techniques, as well as data transformation tools that help bridge the gap between the real world log data formats and the ML and IR data …