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Articles 142051 - 142080 of 302967
Full-Text Articles in Physical Sciences and Mathematics
Adding Syntax Parameters To The Sweet.Js Macro Library For Javascript, Vimal Kumar
Adding Syntax Parameters To The Sweet.Js Macro Library For Javascript, Vimal Kumar
Master's Projects
Lisp and Scheme have demonstrated the power of macros to enable programmers to evolve and craft languages. A macro is a rule or pattern that specifies how a certain input sequence should be mapped to an output sequence according to some defined procedure. Using a macro system a programmer can introduce new syntactic elements to the programming language. Macros found in a program are expanded by a macro expander and allow a programmer to enable code reuse. Mozilla Sweet.JS provides a way for developers to enrich their JavaScript code by adding new syntax to the language through the use of …
Support Vector Machines And Metamorphic Malware Detection, Tanuvir Singh
Support Vector Machines And Metamorphic Malware Detection, Tanuvir Singh
Master's Projects
Metamorphic malware changes its internal structure with each infection, which makes it challenging to detect. In this research, we test several scor- ing techniques that have shown promise in metamorphic detection. We then perform a careful robustness analysis by employing morphing strategies that cause each score to fail. Finally, we show that combining scores using a Sup- port Vector Machine (SVM) yields results that are significantly more robust than we obtained using any of the individual scores.
Introducing Faceted Exception Handling For Dynamic Information Flow, Sri Tej Narala
Introducing Faceted Exception Handling For Dynamic Information Flow, Sri Tej Narala
Master's Projects
JavaScript is most commonly used as a part of web browsers, especially client- side scripts interacting with the user. JavaScript is also the source of many security problems, which includes cross-site scripting attacks. The primary challenge is that code from untrusted sources run with full privileges on the client side, thus lead- ing to security breaches. This paper develops information flow controls with proper exception handling to prevent violations of data confidentiality and integrity.
Faceted values are a mechanism to handle dynamic information flow security in a way that overcomes the limitations caused by dynamic execution, but previous work has …
Cryptanalysis Of Classic Ciphers Using Hidden Markov Models, Rohit Vobbilisetty
Cryptanalysis Of Classic Ciphers Using Hidden Markov Models, Rohit Vobbilisetty
Master's Projects
Cryptanalysis is the study of identifying weaknesses in the implementation of cryptographic algorithms. This process would improve the complexity of such algo- rithms, making the system secure.
In this research, we apply Hidden Markov Models (HMMs) to classic cryptanaly- sis problems. We show that with sufficient ciphertext, an HMM can be used to break a simple substitution cipher. We also show that when limited ciphertext is avail- able, using multiple random restarts for the HMM increases our chance of successful decryption.
Entropy Vs. Energy Waveform Processing: A Comparison Based On The Heat Equation, Michael S. Hughes, John E. Mccarthy, Paul J. Bruillard, Jon N. Marsh, Samuel A. Wickline
Entropy Vs. Energy Waveform Processing: A Comparison Based On The Heat Equation, Michael S. Hughes, John E. Mccarthy, Paul J. Bruillard, Jon N. Marsh, Samuel A. Wickline
Mathematics Faculty Publications
Virtually all modern imaging devices collect electromagnetic or acoustic waves and use the energy carried by these waves to determine pixel values to create what is basically an “energy” picture. However, waves also carry “information,” as quantified by some form of entropy, and this may also be used to produce an “information” image. Numerous published studies have demonstrated the advantages of entropy, or “information imaging”, over conventional methods. The most sensitive information measure appears to be the joint entropy of the collected wave and a reference signal. The sensitivity of repeated experimental observations of a slowly-changing quantity may be defined …
Malware Detection Using Dynamic Analysis, Swapna Vemparala
Malware Detection Using Dynamic Analysis, Swapna Vemparala
Master's Projects
In this research, we explore the field of dynamic analysis which has shown promis- ing results in the field of malware detection. Here, we extract dynamic software birth- marks during malware execution and apply machine learning based detection tech- niques to the resulting feature set. Specifically, we consider Hidden Markov Models and Profile Hidden Markov Models. To determine the effectiveness of this dynamic analysis approach, we compare our detection results to the results obtained by using static analysis. We show that in some cases, significantly stronger results can be obtained using our dynamic approach.
Optimization Of Scheduling And Dispatching Cars On Demand, Vu Tran
Optimization Of Scheduling And Dispatching Cars On Demand, Vu Tran
Master's Projects
Taxicab is the most common type of on-demand transportation service in the city because its dispatching system offers better services in terms of shorter wait time. However, the shorter wait time and travel time for multiple passengers and destinations are very considerable. There are recent companies implemented the real-time ridesharing model that expects to reduce the riding cost when passengers are willing to share their rides with the others. This model does not solve the shorter wait time and travel time when there are multiple passengers and destinations. This paper investigates how the ridesharing can be improved by using the …
A Comparison Of Clustering Techniques For Malware Analysis, Swathi Pai
A Comparison Of Clustering Techniques For Malware Analysis, Swathi Pai
Master's Projects
In this research, we apply clustering techniques to the malware detection problem. Our goal is to classify malware as part of a fully automated detection strategy. We compute clusters using the well-known �-means and EM clustering algorithms, with scores obtained from Hidden Markov Models (HMM). The previous work in this area consists of using HMM and �-means clustering technique to achieve the same. The current effort aims to extend it to use EM clustering technique for detection and also compare this technique with the �-means clustering.
Clustering Versus Svm For Malware Detection, Usha Narra
Clustering Versus Svm For Malware Detection, Usha Narra
Master's Projects
Previous work has shown that we can effectively cluster certain classes of mal- ware into their respective families. In this research, we extend this previous work to the problem of developing an automated malware detection system. We first compute clusters for a collection of malware families. Then we analyze the effectiveness of clas- sifying new samples based on these existing clusters. We compare results obtained using �-means and Expectation Maximization (EM) clustering to those obtained us- ing Support Vector Machines (SVM). Using clustering, we are able to detect some malware families with an accuracy comparable to that of SVMs. One …
Using Cellular Automata And Lattice Boltzmann Methods To Model Cancer Growth: Analysis Of Combination Treatment Outcomes, Jenna L. Butler
Using Cellular Automata And Lattice Boltzmann Methods To Model Cancer Growth: Analysis Of Combination Treatment Outcomes, Jenna L. Butler
Electronic Thesis and Dissertation Repository
In Canada it is estimated that 76,600 people will die of cancer in 2014. Cancer, a collection of over 200 diseases, has differences existing between globally, between individuals and overtime in one individual. Treatment options are similarly varied. These differences make selecting the best possible treatment for every type of cancer very challenging. In addition, with no single cure for cancer, treatments are often combined in different ways to form the best overall option. In an attempt to synthesize the properties of these diseases into a collection of common cellular changes, Hanahan and Weinberg proposed ``the hallmarks of cancer" -- …
Crop Rotational Diversity Enhances Belowground Communities And Functions In An Agroecosystem, L. K. Tiemann, A. Stuart Grandy, E. E. Atkinson, E. Marin-Spiotta, M. D. Mcdaniel
Crop Rotational Diversity Enhances Belowground Communities And Functions In An Agroecosystem, L. K. Tiemann, A. Stuart Grandy, E. E. Atkinson, E. Marin-Spiotta, M. D. Mcdaniel
Faculty Publications
Biodiversity loss, an important consequence of agricultural intensification, can lead to reductions in agroecosystem functions and services. Increasing crop diversity through rotation may alleviate these negative consequences by restoring positive aboveground–belowground interactions. Positive impacts of aboveground biodiversity on belowground communities and processes have primarily been observed in natural systems. Here, we test for the effects of increased diversity in an agroecosystem, where plant diversity is increased over time through crop rotation. As crop diversity increased from one to five species, distinct soil microbial communities were related to increases in soil aggregation, organic carbon, total nitrogen, microbial activity and decreases in …
Exploring The Chemistry Of Phosphorus For Photopolymer Applications, Ryan Guterman
Exploring The Chemistry Of Phosphorus For Photopolymer Applications, Ryan Guterman
Electronic Thesis and Dissertation Repository
Prior to this thesis, phosphorus-containing polymers and photopolymerization represented two distinct, non-overlapping fields of study. This thesis examined the prospect of combining these two approaches to create a system possessing the benefits of both techniques. By exploiting the chemistry of phosphorus, and using photopolymerization as a fabrication method, new materials were developed and assessed for their use in various applications.
Among the many phosphorus compounds that may be used in polymer science, phosphonium salts and primary phosphines were of specific focus. First, highly fluorinated phosphonium monomers were developed to create photopolymerized hydrophobic surfaces. A structure-activity relationship was established, as both …
Combinatorial Techniques In The Galois Theory Of P-Extensions, Michael Rogelstad
Combinatorial Techniques In The Galois Theory Of P-Extensions, Michael Rogelstad
Electronic Thesis and Dissertation Repository
A major open problem in current Galois theory is to characterize those profinite groups which appear as absolute Galois groups of various fields. Obtaining detailed knowledge of the structure of quotients and subgroup filtrations of Galois groups of p-extensions is an important step toward a solution. We illustrate several techniques for counting Galois p-extensions of various fields, including pythagorean fields and local fields. An expression for the number of extensions of a formally real pythagorean field having Galois group the dihedral group of order 8 is developed. We derive a formula for computing the Fp-dimension of an n-th …
Environmental Social Activism In The San Diego-Tijuana Transborder Region, Christina M. Hirt
Environmental Social Activism In The San Diego-Tijuana Transborder Region, Christina M. Hirt
Undergraduate Honors Theses
This paper examines the obstacles and opportunities social activists face when attempting to fight environmental injustices in the San Diego-Tijuana transborder region. The study undertakes a case study of the Environmental Health Coalition (EHC) - the leading environmental justice organization in the region, which operates on both sides of the US-Mexico Border. The analyses conclude that despite a strong rhetoric of binationalism employed throughout border activists’ campaigns, the strategies that are utilized on the ground have been vastly local and short-term in focus. While activist organizations like the EHC demonstrate a keen awareness of the binational implications of environmental injustices …
Antibacterial Activity Of Native California Medicinal Plant Extracts Isolated From Rhamnus Californica And Umbellularia Californica., Maria G. Carranza, Mary B. Sevigny, Debashree Banerjee, Lacie Fox-Cubley
Antibacterial Activity Of Native California Medicinal Plant Extracts Isolated From Rhamnus Californica And Umbellularia Californica., Maria G. Carranza, Mary B. Sevigny, Debashree Banerjee, Lacie Fox-Cubley
Natural Sciences and Mathematics | Faculty Scholarship
BACKGROUND: Antimicrobial resistance (AMR) is a major threat to global public health. Medicinal plants have long been used as remedies for infectious diseases by native cultures around the world and have the potential for providing effective treatments for antibiotic-resistant infections. Rhamnus californica (Rhamnaceae) and Umbellularia californica (Lauraceae) are two indigenous California plant species historically used by Native Americans to treat skin, respiratory and gastrointestinal infections. This study aimed to assess the in vitro antimicrobial activity of methanolic extracts of leaves and bark of R. and U. californica against methicillin-resistant Staphylococcus aureus (MRSA) and other Gram-positive and Gram-negative bacteria.
METHODS: Methanolic …
A Solution In Weyl Gravity With Planar Symmetry, James Thomas Wheeler
A Solution In Weyl Gravity With Planar Symmetry, James Thomas Wheeler
James Thomas Wheeler
We solve the Bach equation for Weyl gravity for the case of a static metric with planar symmetry. The solution is not conformal to the solution to the corresponding Einstein equation.
Electrolyte Effects On The Kinetics Of Comproportionation Electron-Transfer Reactions And On Intervalence Charge-Transfer Band Energies Of Binuclear Ruthenium Ammine Complexes, Zhiji Han
Master's Theses
Chapter 1 describes an overview of electron-transfer reactions. The kinetic equations for ET reactions have also been described in detail.
Chapter 2 describes a series of novel kinetic accelerations which deviate strongly from the predictions of the classical Debye-Huckle theory with a range of different added “inert” electrolytes. The greater catalytic effects seen with the heavier halides and other catalytic electrolytes (especially certain dicarboxylates) indicate an important role for hole-transfer superexchange in the ET transition state. The hypothesis of a catalytic ternary association complex, [RuII--X--RuIII] has also been explored by kinetic modeling of the reaction. An increasing ratio of anion-catalyzed …
Measuring Charge Carrier Mobility In Graphene, Christina A. Harmon
Measuring Charge Carrier Mobility In Graphene, Christina A. Harmon
Senior Theses
This research reports measurements of electron mobility in Graphene Field Effect Transistors (GFET), gated with liquid. Mobility is a quantity describing how easily charge carriers move through a material. GFET biosensors have the greatest sensitivity when the mobility is high; therefore, increasing mobility should improve sensitivity of these and similar devices. An optimal method was established for preparing samples and taking measurements of a liquid-gate device. Sheet conductivity was measured using van der Pauw geometry and carrier density was determined from measurements of the liquid-gate capacitance. It is shown that mobility improves after the graphene surface is cleaned by an …
Antigen Discovery For The Identification Of Vaccine Candidates And Biomarkers Using A T Cell Driven Approach In Combination With Positional Scanning Peptide Libraries, Valeria A. Judkowski, Radleigh Santos, Gonzalo R. Acevedo, Marc Giulianotti, Jon R. Appel, Silvia A. Longhi, Karina A. Gomez, Clemencia Pinilla
Antigen Discovery For The Identification Of Vaccine Candidates And Biomarkers Using A T Cell Driven Approach In Combination With Positional Scanning Peptide Libraries, Valeria A. Judkowski, Radleigh Santos, Gonzalo R. Acevedo, Marc Giulianotti, Jon R. Appel, Silvia A. Longhi, Karina A. Gomez, Clemencia Pinilla
Mathematics Faculty Articles
The prevention and treatment of infectious diseases is highly dependent on the availability of reliable diagnostic tests and protective or therapeutic vaccines. There also exists an urgent need to develop reliable biomarkers to monitor treatment success and to predict disease progression from asymptomatic to symptomatic disease in several disease scenarios. The elucidation of the disease-relevant antigens that elicit the protective immune responses is critical and required for the development of biomarkers, diagnostics, and vaccines. However; one of the main obstacles to the study of antigen specificity in human T cells is their low frequency in PBMC samples. To overcome this …
Wpływ Instalacji Termicznego Przekształcania Odpadów Komunalnych Na Jakość Powietrza, Robert Oleniacz
Wpływ Instalacji Termicznego Przekształcania Odpadów Komunalnych Na Jakość Powietrza, Robert Oleniacz
Robert Oleniacz
At the turn of 2015/2016 it is planned to launch in Poland a few new municipal solid waste incineration plants. This type activities causes usually concerns of the local community due to their potential negative impact on air quality. Are these fears are, however, justified? The article describes allowable air emissions for new waste incinerators, the actual emissions that occur from such installations, and the current state of knowledge about their impact on air pollution.English title: The impact of installations of municipal solid waste thermal treatment on air quality.
Chiral Structures And Defects Of Lyotropic Chromonic Liquid Crystals Induced By Saddle-Splay Elasticity, Z. S. Davidson, L. Kang, J. Jeong, T. Still, Peter J. Collings, T. C. Lubensky, A. G. Yodh
Chiral Structures And Defects Of Lyotropic Chromonic Liquid Crystals Induced By Saddle-Splay Elasticity, Z. S. Davidson, L. Kang, J. Jeong, T. Still, Peter J. Collings, T. C. Lubensky, A. G. Yodh
Physics & Astronomy Faculty Works
An experimental and theoretical study of lyotropic chromonic liquid crystals (LCLCs) confined in cylinders with degenerate planar boundary conditions elucidates LCLC director configurations. When the Frank saddle-splay modulus is more than twice the twist modulus, the ground state adopts an inhomogeneous escaped-twisted configuration. Analysis of the configuration yields a large saddle-splay modulus, which violates Ericksen inequalities but not thermodynamic stability. Lastly, we observe point defects between opposite-handed domains, and we explain a preference for point defects over domain walls.
Investigations Of Thioether Generation For S-D-Ribosyl-L-Homocysteine Synthesis, Brendan Corcoran
Investigations Of Thioether Generation For S-D-Ribosyl-L-Homocysteine Synthesis, Brendan Corcoran
Master's Theses
Creation of the thioether linkage is a fundamental step for the chemical preparation of the bacterial quorum sensing molecule S-D-ribosyl-L-homocysteine (SRH). Although previous preparations of SRH and its analogues have been reported in the literature, they employ assorted methods with varied results. Therefore, a reassessment of the methodology used for synthetic preparation of the thioether bond in SRH-like molecules is here considered. This work examines four methods of thioether generation following two mechanisms, bimolecular nucleophilic substitution (SN2) and radical-initiated thiol-ene coupling, in an attempt to generate SRH in a more efficient and reproducible manner. Both mechanisms address …
Reducing Coastal Risk – Structural Protection Around Greater New Orleans, Rick Luettich
Reducing Coastal Risk – Structural Protection Around Greater New Orleans, Rick Luettich
May 22, 2015: Megaproject Protective Structures for Hampton Roads
No abstract provided.
Agenda, Hr Adaptation Forum
Agenda, Hr Adaptation Forum
May 22, 2015: Megaproject Protective Structures for Hampton Roads
No abstract provided.
Planning And Design For Hurricane Protection With Sea Level Rise, Bob Ivarson
Planning And Design For Hurricane Protection With Sea Level Rise, Bob Ivarson
May 22, 2015: Megaproject Protective Structures for Hampton Roads
No abstract provided.
You're Going To Need A Bigger Boat..., Michelle Hamor
You're Going To Need A Bigger Boat..., Michelle Hamor
May 22, 2015: Megaproject Protective Structures for Hampton Roads
No abstract provided.
Some Studies On Selected Stream Ciphers Analysis Fault Attack & Related Results., Subhadeep Banik Dr.
Some Studies On Selected Stream Ciphers Analysis Fault Attack & Related Results., Subhadeep Banik Dr.
Doctoral Theses
Stream Ciphers are important Symmetric Cryptological primitives, built for the purpose of providing secure message encryption. As no formal security proofs exist, our confidence in these algorithms is largely based on the fact that intense cryptanalysis has been carried out over several years without revealing any weakness. This thesis makes some independent contributions to the cryptanalysis of a selection of stream ciphers.In this thesis, we take a closer look at two stream ciphers viz. RC4+ designed by Maitra et al. at Indocrypt 2008 and GGHN designed by Gong et al. at CISC 2005. Both these ciphers were designed as viable …
Management Recommendations For Restoration Of The Degraded Olympia Oyster, Ostrea Lurida Carpenter 1864 In Tomales Bay, Ca, Carolyn M. Gibson
Management Recommendations For Restoration Of The Degraded Olympia Oyster, Ostrea Lurida Carpenter 1864 In Tomales Bay, Ca, Carolyn M. Gibson
Master's Projects and Capstones
This research addresses the effective restoration of Olympia oyster populations in Tomales Bay, Marin County, California. Chapter 2 provides background information on the Tomales Bay estuary, regional history, and ecology of the Olympia oyster. Following this background discussion, each of the three aforementioned degraders of Olympia oyster populations in Tomales Bay is presented: ocean acidification (Chapter 3), sedimentation (Chapter 4), and invasive species (Chapter 5). Each of these issues creates numerous barriers that require the attention of resource protection managers. Chapter 6 presents overall Research Conclusions and Chapter 7 identifies management recommendations to effectively begin the restoration of the Olympia …
Effective Mitigation Of Sedimentation On Riparian Riverbeds And Salmonid Populations After Dam Removal, Monica Oey
Effective Mitigation Of Sedimentation On Riparian Riverbeds And Salmonid Populations After Dam Removal, Monica Oey
Master's Projects and Capstones
Riparian ecosystems rely on longitudinal connectivity of their streams and tributaries to maintain a healthy ecosystem. Longitudinal connectivity is especially important for salmonid populations, which and rely on longitudinal connectivity to reach spawning habitat. Dams prevent longitudinal connectivity while providing cities with potable water, hydroelectricity, and irrigation. With increasing knowledge of how dams negatively affect the riparian ecosystem and various polices, dam removals are increasing in popularly. However, a major concern with dam removal projects is the release of large loads of impounded sediment. Sediment is known to negatively impact salmonids life cycle through increasing turbidity and causing fine sediment …
An Analysis Of The Los Angeles Metropolitan Transportation Authority’S Ability To Achieve Sustainability As Defined By The Transportation Index For Sustainable Places, Vanessa Trafas
Master's Projects and Capstones
This paper analysis the ability of the Los Angeles Metropolitan Transportation Authority to adhere to sustainability under the Transportation Index for Sustainable Places (TISP). Analysis focuses solely on the environmental domain of the TISP and the criteria included within that domain. Three pieces are analyzed: the Los Angeles Sustainable Implementation Plan, the Sustainable Rail Plan, and the Regional Connector Transit Project. These pieces are found to adhere to the sustainability criteria under the environmental domain of the TISP.