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Full-Text Articles in Physical Sciences and Mathematics
Development Of Large-Area Gem Detectors For The Forward Muon Endcap Upgrade Of The Cms Experiment And Search For Sm Higgs Boson Decay In The H → Τ+Τ− → Μ+Μ−¯Νμνμ¯Ντντ Channel At √ S = 13 Tev, Vallary Shashikant Bhopatkar
Development Of Large-Area Gem Detectors For The Forward Muon Endcap Upgrade Of The Cms Experiment And Search For Sm Higgs Boson Decay In The H → Τ+Τ− → Μ+Μ−¯Νμνμ¯Ντντ Channel At √ S = 13 Tev, Vallary Shashikant Bhopatkar
Theses and Dissertations
Gas Electron Multiplier (GEM) technology is being considered for the forward muon upgrade of the Compact Muon Solenoid (CMS) experiment in Phase II of the CERN LHC. The first GEM Endcap (GE1/1) is going to be installed in the 1.5 <| η |< 2.2 region of the muon endcap mainly to control muon level-1 trigger rates after the second long LHC shutdown. A GE1/1 triple-GEM detector is read out by 3,072 radial strips with 453 µrad pitch arranged in eight η-sectors. A meter-long GE1/1 prototype-III was assembled at Florida Tech and tested in 20-120 GeV hadron beams at Fermilab using Ar/CO2 70:30 and the RD51 Scalable Readout System (SRS). Four GEM detectors with 2-D readout and an average measured azimuthal resolution of 36µrad provided precise reference tracks. Construction of this GE1/1 prototype-III detector and its performance in the test beam are described. Strip cluster parameters, detection efficiency, and spatial resolution are studied with position and high voltage scans. The plateau detection efficiency is [97.80 ± 0.2 (stat)]%. The azimuthal resolution is found to be [123.5 ± 1.6 (stat)] µrad when operating in the center of the efficiency plateau and using full pulse height information. The CMS upgrade design calls for readout electronics with binary hit output. When strip clusters are formed correspondingly without charge-weighting and with fixed hit thresholds, a position resolution of [136.8 ± 2.5 stat] µrad is measured, consistent with the expected resolution from strip-pitch/√ 12 = 131.3 µrad. The eight η-sectors of the detector show a similar response and performance. VFAT3 electronics are being considered for the readout system of GE1/1 detectors. The charge that is induced on the GE1/1 readout strips by minimum-ionizing particles is an important parameter that informs the design of the amplifier-shaper input stage of the VFAT3 chip. To estimate the input charge range for these electronics, the most probable value, mean value, and 99th percentile value of the Landau distribution of the charge induced on a single strip are measured and found to be 4 fC, 11 fC, and 115 fC, respectively. The Z/γ∗ → τ τ cross section in proton-proton collisions at √ s = 13 TeV is measured, using data recorded by the CMS experiment at the LHC during 2015 and corresponding to an integrated luminosity of 2.3 fb−1 . The product of the cross section and branching fraction is measured in the dimuon final state to be 1967 ± 121 (stat.) ± 92 (syst.) ± 37 (lumi.) pb, in agreement with the standard model expectation, computed at next-to-next-to-leading order accuracy in perturbative quantum chromodynamics. A search for Standard Model (SM) Higgs bosons decaying into pairs of tau leptons and then to two muons plus (anti)-neutrinos is performed using the data collected by the CMS detector in 2016 with 35.9 fb−1 of integrated luminosity. The upper limits on the cross section relative to SM prediction are calculated in three event categories with different jet multiplicities focusing on Higgs boson signal events produced via gluon-gluon fusion and vector boson fusion. A multivariate analysis with Boosted Decision Trees (BDT) is used to suppress the large Drell-Yan background. The di-tau mass is reconstructed using a Secondary-Vertex fit (SVFit) algorithm using a maximum likelihood approach. Experimental limits are presented in all three categories extracted from the maximum likelihood fit of reconstructed di-tau mass and the visible mass of the dimuon system. The signal strength for the combination of all three categories is estimated as -1.0 ± 1.7. The expected and observed upper limits with 95% CL is at 3.2 and 2.7, respectively, with respect to the SM cross section times branching fraction.
Interaction Between Fragments Of Tau Protein Investigated By Force Spectroscopy Using Afm, Anad Mohamed Afhaima
Interaction Between Fragments Of Tau Protein Investigated By Force Spectroscopy Using Afm, Anad Mohamed Afhaima
Theses and Dissertations
Over the last couple of decades, there has been rapidly growing interest in research of natively unfolded proteins. Some proteins from this group are implicated in a number of neurodegenerative diseases. One group of neurodegenerative diseases, taupathies, is associated with tau protein. A number of biophysical and spectroscopic studies have revealed that tau protein can expand to a largely extended state and to transition rapidly between many different conformations. Although many of the techniques that elucidate structure of macromolecules have provided important information about the folded states of proteins, important information about the transition between the extended conformation states remain …
Metastable-State Photoacids And The Related Photo-Responsive Polymers, Zhuozhi Wang
Metastable-State Photoacids And The Related Photo-Responsive Polymers, Zhuozhi Wang
Theses and Dissertations
Metastable-state photoacid is a type of photo-sensitive compounds that can release large amount of protons reversibly upon visible-light irradiation. Since being developed by our group in 2011, metastable-state photoacid has been utilized to develop many applications that involve controlling proton transfer processes. Since proton transfer process is one of the most common processes in nature, metastable-state photoacid is a powerful tool to control various processes with light. A introduction of metastable state photoacid is described in Chapter 1. In Chapter 2, metastable-state photoacids with different substituents were designed to study the relationship between their structures and physicochemical properties. In Chapter …
Parametric And Non-Parametric Regression Models With Applications To Climate Change, Osita Eluemuno Onyejekwe
Parametric And Non-Parametric Regression Models With Applications To Climate Change, Osita Eluemuno Onyejekwe
Theses and Dissertations
In this dissertation we have studied the climate factors that contribute to climate change using univariate and multivariate parametric methods as well as nonparametric models. In this study, we have three major contributions. First, the extent of mountain glaciers around the globe and their responses to climate factors are investigated using multivariate methods and we have proposed a predictive model to estimate the mountain glacier response to climate factors. Second, we have addressed the important problem of bandwidth selection in presence of correlated noise in nonparametric regression analysis. We have proposed a denoising method based on an ensemble bandwidth optimization …
A Mixed-Reality Approach For Cyber-Situation Awareness, Tapas Dipakkumar Joshi
A Mixed-Reality Approach For Cyber-Situation Awareness, Tapas Dipakkumar Joshi
Theses and Dissertations
As the proliferation and adoption of smart devices increase, there is an unprecedented amount of data being released into the network every second. Computer networks are the carriers for the movement of this ever generating amounts of data, but are dumb in a way that they do not distinguish between suspicious data traffic and valid data traffic. Also, for however secure a computer network be, suspicious network traffic activities are bound to happen. These suspicious traffic activities have to be detected, analyzed and stopped before it compromises the entire network and leaves the information and data security of an organization …
A Context-Free Method Of Visualizing Streaming Object Data For The Purpose Of Identifying Known Events: An Implementation And Analysis, Quinn Gregory Carver
A Context-Free Method Of Visualizing Streaming Object Data For The Purpose Of Identifying Known Events: An Implementation And Analysis, Quinn Gregory Carver
Theses and Dissertations
This year, every second, five gigabytes of new data will be streamed to storage and yet less than half a percent of all this data will ever be analyzed. Much of this muted data is high-variety object data, unnoticed in a void of sorely needed tools to make it readily understandable. A software tool for visualizing streaming object data in a context-free manner can be built, and this tool would aid in finding predictor data for known events which are functions of the data. The design of the tool to support the hypothesis is presented and field results from over …
Metastable-State Nh Photoacids And Organic Photo Carbon Monoxide Releasing Materials, Aluthwatte Rallage Nawodi Madhusanka Abeyrathna
Metastable-State Nh Photoacids And Organic Photo Carbon Monoxide Releasing Materials, Aluthwatte Rallage Nawodi Madhusanka Abeyrathna
Theses and Dissertations
The recently discovered metastable-state photoacids (mPAHs) can produce a large proton concentration with high efficiency and good reversibility upon irradiation with visible light with moderate intensity. Therefore, mPAHs can be conveniently incorporated in to different systems to control various proton-transfer processes. Recently, several applications of mPAHs have been demonstrated. However, none of the previously reported mPAHs can function at a pH 7.4. Thus, biological applications of mPAHs are limited. In this work, mPAHs that can reversibly release a proton in PBS buffer (pH = 7.4) under visible light are designed and synthesized. NH-PAH-1 is the first of this type of …
St. Lucie Shoal Complex: Regional Sediment Resource Or Submerged Storm Breakwater, Leaf Erickson
St. Lucie Shoal Complex: Regional Sediment Resource Or Submerged Storm Breakwater, Leaf Erickson
Theses and Dissertations
Nearshore sand shoals have become the predominant sediment resource for beach nourishment projects on the east coast of Florida. Along this coast, the St. Lucie Shoal Complex (SLSC) is comprised of several shoals designated as sediment resources for beach nourishment, many having depths less than 7 meters, at their crests. This group of shoals represents the largest high-quality beach nourishment sediment resource in southeast Florida. Among these shoals, the St. Lucie shoal is the largest and shallowest at the crest. This project explores the current best practice methodologies to explore impacts of excavating sand resources from shallow-crested shoal systems like …
High Volume Test Automation With Yeager, Casey Doran
High Volume Test Automation With Yeager, Casey Doran
Theses and Dissertations
High Volume Automated Testing is a powerful family of software testing techniques which enable a variety of testing goals, including the discovery of hard-to-reproduce bugs, which can enable new levels of quality assurance when applied correctly. This thesis presents a software tool, Yeager, which may be used in conjunction with existing test code to execute tests similar to Long Sequence Regression Tests based on an inferred state-model of the system under test as provided by tester annotations of state transitions caused by individual test code snippets. The usefulness of the package is evaluated through the development and deployment of a …
The Growth, Structure, And Dynamics Of Crime In Cities, Marcos Oliveira
The Growth, Structure, And Dynamics Of Crime In Cities, Marcos Oliveira
Theses and Dissertations
Crime is ubiquitous in cities but lacks a statistical characterization that could lead to uncovering its underlying mechanisms. Cities are, however, in a constant process of organization making difficult to analyze urban phenomena. Yet, to understand urbanization and its consequences, we need to approach cities as evolving processes, instead of static objects. With this perspective, we examined regularities in crime regarding its growth, structure, and dynamics. We developed frameworks to examine the spatial, temporal, and periodic variations of crime in cities. Though thefts increase super-linearly with the population, we found burglaries showing a linear increase. Our analyses also confirmed crime …
Surface Modification Of Core-Shell Silver-Titania Nanocomposites With Copper Bipyridine–Phosphonates And Studies On Ag@Tio₂ Mediated Degradation Of Organophosphates, Somayeh Talebzadeh Farooji
Surface Modification Of Core-Shell Silver-Titania Nanocomposites With Copper Bipyridine–Phosphonates And Studies On Ag@Tio₂ Mediated Degradation Of Organophosphates, Somayeh Talebzadeh Farooji
Theses and Dissertations
Silver nanoparticles, coated with a titania shell were prepared and were shown to be catalytically active for the rapid degradation of organothiophosphate methyl parathion (MeP). Formation of the degradation product, p-nitrophenolate (PNP) was monitored as a function of pH, using UV-Vis spectroscopy, and 31P NMR spectroscopy confirmed the hydrolysis is the predominant pathway for substrate breakdown under non-photocatalytic degradation. We have demonstrated that the unique combination of TiO2 and silver nanoparticles is required for catalytic hydrolysis with good reproducibility. This work represents the first example of MeP degradation using TiO2 doped with AgNP under mild and ambient conditions. It is …
5-Oxo-Ete Antagonists In Allergic Disease; Design And Synthesis Of Affinity Chromatography Ligand For 5-Hedh; And Synthesis Of Isoprostanes As An Index For The Diagnosis In Alzheimer’S Disease, Qiuji Ye
Theses and Dissertations
Arachidonic acid (AA, 4, Figure 1) is a 20:4 (ω-6) fatty acid with a 20-carbon chain and four cis-double bonds, and the esterified form of AA in phospholipids can be enzymatically liberated by phospholipases (PL) and subsequently metabolized into a variety of physiologically important mediators known as eicosanoids (Figure 2). One of the most important eicosanoids is 5-oxo-6,8,11,14-eicosatetraenoic acid (5-oxo-ETE, 17). The 5-oxo-ETE (17) is the most known potent chemotactic factors for human eosinophils, and it can stimulate the late-phase asthma attacks.¹ To determine how the biosynthesis of 5-oxo-ETE is regulated, so as to determine its pathophysiological roles in the …
Information Densification Of Social Constructs Via Behavior Analysis Of Social Media Users – A Study On Twitter, Diogo F. Pacheco
Information Densification Of Social Constructs Via Behavior Analysis Of Social Media Users – A Study On Twitter, Diogo F. Pacheco
Theses and Dissertations
We live in a digital era where everyday activities are increasingly being replaced by online interactions. In addition, technology advances and data availability are changing the way we expand our knowledge about ourselves, society, and the environment. The increasing availability of data, especially social media data, has called the attention of researchers, and we have been witnessing an outbreak in studies relying on this rich source of information. However, most social media research is tuned to improve the outcomes of specific problems. Therefore, the reuse of techniques used in different areas is limited to data specialists. We propose a straightforward …
Mining Location And User Information From Users’ Trajectories, Marcello Tomasini
Mining Location And User Information From Users’ Trajectories, Marcello Tomasini
Theses and Dissertations
The understanding of human mobility is integral to the advancement of many fields including public health, city planning, economic forecasting, and it attracts the interest of researchers from a broad number of fields. The work of such researchers would not have been possible without the availability of large localized datasets such as mobile phone Call Detail Records (CDRs) provided by telco operators and Location Based Social Networks (LBSNs) check-ins provided by popular applications such as Twitter, Facebook and Foursquare. However, such datasets are often incomplete, anonymized, and/or inaccurate. Hence there is a need to partially reconstruct or extract more information …
Testing The Wind-Shock Paradigm For B-Type Star X-Ray Production With Θ Carinae, Trisha F. Doyle
Testing The Wind-Shock Paradigm For B-Type Star X-Ray Production With Θ Carinae, Trisha F. Doyle
Theses and Dissertations
We present Chandra X-ray grating spectroscopy of the B0.2V star, θ Carinae. θ Car is in a critical transition region between the latest O-type and earliest B-type stars, where some of these stars are observed to have UV-determined mass-loss rates much lower than theoretically expected. In general, X-ray emission in this low-luminosity regime should be less prominent than in O-star winds, but observations have shown a higher than expected production of X-ray emission from the winds of these stars (e.g., Cohen et al. 2008; Huenemoerder et al. 2012). A hot wind could explain weak UV wind signatures, but this severely …
Decision Support For Shared Responsibility Of Cloud Security Metrics, Moteeb Aieed Al Moteri
Decision Support For Shared Responsibility Of Cloud Security Metrics, Moteeb Aieed Al Moteri
Theses and Dissertations
With the rapid growth of cloud computing and the increasing importance of measuring the security of cloud systems, more attention has been focused on the need for security metrics that are specific to cloud computing. The use of metrics in cloud computing enables improved service selection, service agreement, and service verification. This dissertation presents a taxonomy of cloud security metrics and guideline and a framework for allocating cloud security metrics shared responsibility. The taxonomy considers several novel viewpoints. Metrics are organized by cloud capability type (Application, Platform, Infrastructure) along with the type of cloud deployment (public, private, hybrid, community), and …
On Logconcavity Of Multivariate Discrete Distributions, Majed Ghazi Alharbi
On Logconcavity Of Multivariate Discrete Distributions, Majed Ghazi Alharbi
Theses and Dissertations
The contribution of this dissertation to the literature is twofold. First, we use a geometric perspective to present all possible subdivisions of R³ into tetrahedra with disjoint interiors and adopt a combinatorial approach to obtain a special subdivision of Rⁿ into simplices with disjoint interiors, where two simplices are called neighbors if they share a common facet. We then use the neighborhood relationship of the simplices in each subdivision to fully describe the sufficient conditions for the strong unimodality/logconcavity of the trivariate discrete distributions and further extend these results to present a new sufcient condition for the strong unimodality/logconcavity of …
Copper Tolerance Of Amphibalanus Amphitrite As Observed In Central Florida, Hannah Grace Brinson
Copper Tolerance Of Amphibalanus Amphitrite As Observed In Central Florida, Hannah Grace Brinson
Theses and Dissertations
Copper tolerance in the invasive barnacle Amphibalanus amphitrite has been observed in Florida by the Center for Corrosion and Biofouling Control since 2012 and by Weiss (1947). To test the theory that this barnacle preferentially settles on copper coated surfaces to avoid settlement competition by other sessile species, a series of two experiments and a literature review of historical copper toxicity tests on larval barnacles was conducted. The barnacle A amphitrite was preferentially used in many previous toxicity studies because it is readily available, has high fecundity, and is more sensitive to some toxicants than other species, including the native …
Distributions Of Polychaetes As A Function Of Sediment Composition In A Subtropical Lagoon, Anthony William Cox
Distributions Of Polychaetes As A Function Of Sediment Composition In A Subtropical Lagoon, Anthony William Cox
Theses and Dissertations
Fine-grained organic-rich sediments (FGORS) in the Indian River Lagoon (IRL), Florida, the human activities and nutrient inputs and have a varied composition, including water content, silt-clay content, and organic matter. When these constituents reach, by weight, 75%, 60% dry, and 10% dry, respectively, this is sometimes referred to as IRL “muck”. Many polychaetes inhabit the benthic sediments of estuaries and must tolerate various degrees of FGORS. The Cox IRL Muck Index (CMI) is proposed as a mechanism for determining the organic sediment tolerances of infaunal species in a simple and direct manner. IRL muck will have a minimum CMI of …
Evaluating Ensemble Wind Downscaling Methodologies Over A Coastal Estuary, Bryan Paul Holman
Evaluating Ensemble Wind Downscaling Methodologies Over A Coastal Estuary, Bryan Paul Holman
Theses and Dissertations
Current numerical weather prediction (NWP) ensemble systems are biased and under dispersive. While statistical methods have been developed to correct for these errors, the resulting post processed forecasts are typically available at observing stations only. Yet post processed forecasts are needed everywhere. Additionally, the horizontal grid spacing of current ensemble systems is too coarse to resolve the Indian River Lagoon (IRL), a coastal estuary in central Florida that impacts the local wind climatology. Thus, computationally reasonable approaches are needed that simultaneously downscale and post process ensemble wind forecasts. Currently no approach exists to do this, particularly in coastal areas such …
Novel Hyperspectral Imagery And Platforms For Shallow Water Environments, Taylor Scott Oney
Novel Hyperspectral Imagery And Platforms For Shallow Water Environments, Taylor Scott Oney
Theses and Dissertations
Hyperspectral measurements of the water surface in urban coastal waters are presented. Oblique bidirectional reflectance factor (BRF) imagery was acquired of coastal shallow waters within the watershed of the Indian River Lagoon, Florida and along littoral zone waters of the nearby Atlantic Ocean. Oblique imagery of the shoreline and subsurface features clearly shows subsurface bottom features and rip current features within the surf zone water column. The imagery was collected using a pushbroom hyperspectral imager mounted on a fixed platform with a calibrated circular mechatronic rotation stage. Hyperspectral imaging using the fixed platform techniques were used to calculate hyperspectral bidirectional …
A Reinforcement Learning Approach To Autonomous Speed Control In Robotic Systems, Nima Aghli
A Reinforcement Learning Approach To Autonomous Speed Control In Robotic Systems, Nima Aghli
Theses and Dissertations
Model-free reinforcement learning techniques have been successfully used in diverse robotic applications. In this thesis, we Implement the Q-learning algorithm as one of the most used model-free algorithms to find an optimal control signal for driving fast running trains on fixed tracks without flipping over or derailing. We examine the performance of the human driver and compare the results of reinforcement learning based controller to human driver performance. To test the proposed algorithm, a complete hardware and software testbed has been designed. We conclude that in simple tasks, human drivers perform identical to reinforcement learning algorithm, but in more complicated …
High Fidelity Adaptive Cyber Emulation, Samir Mammadov
High Fidelity Adaptive Cyber Emulation, Samir Mammadov
Theses and Dissertations
While looking for a high-level adaptive traffic generation tool, we came to realize that no such tool exists that can be used for rapid development while being platform agnostic. Having reviewed a wide array of tools to either implement user models or simulate traffic, we were unable to find a tool with the right capabilities while maintaining complexity, portability and extensibility. To overcome these issues, we introduce a new adaptive user-modelling framework for the specific use case of cyber activity emulation. Our framework supports the creation of high-level user models that can react to changes in their environments and vary …
Open Census For Addressing False Identity Attacks In Decentralized Social Networks, Song Qin
Open Census For Addressing False Identity Attacks In Decentralized Social Networks, Song Qin
Theses and Dissertations
We address the problem of estimating the population of a given area (e.g., a city). Unlike a centralized census where identities are reported to a single principal agency (e.g., U.S. Census Bureau) and are stored on a centralized data server, the proposed decentralized census distributes reported identities in a peer-to-peer (P2P) network. Peers in this network can also distribute opinions on whether some of the reported identities are correct or false. The estimation of the count of correct identities is based on the available information. A decentralized census enables individuals to independently verify governmental census data. The results of a …
The Effects Of Thunderstorm Static And Quasi-Static Electric Fields On The Lower Ionosphere, Mohammad Ahmad Salem
The Effects Of Thunderstorm Static And Quasi-Static Electric Fields On The Lower Ionosphere, Mohammad Ahmad Salem
Theses and Dissertations
Thunderstorms and their lightning discharges are of great interest to many areas of geophysics and atmospheric electricity. A thunderstorm is an electric generator; it can produce both electrostatic and quasi-electrostatic fields in the overhead atmospheric D region. The D region is the lower part of the ionosphere that extends from about 40-90 km altitude where the electrons and ions are sufficient enough to affect the propagation of radio waves. In contrast to the electrostatic field, the quasi-electrostatic fields can be much stronger in magnitude, but shorter in duration, and can trigger halos. A halo is one type of the transient …
Part (I): Synthesis, Characterization And Antibacterial Activity Of Vanadium(V) Complexes With Ons Schiff Bases Part (Ii): Synthesis Of 9-Cd₃-11-Cis-Retinal For The Investigation Of The Activation Mechanism Of Gpcr Rhodopsin By Solid-State ²H Nmr Spectroscopy, Samira M. Faylough
Theses and Dissertations
Vanadium compounds are known to play many roles in both biology and industry, and the biochemical activity of these compounds has led to their increased importance in both biological and medical research. In the present work, some new substituents for hydrazinecarbodithioate Schiff base ligands and their dioxo vanadium(V) complexes were synthesized and characterized by ¹H NMR, ¹³C NMR, DART mass, FT-IR, UV-vis, fluorescence spectrometer, and single X-ray diffraction analysis for complex K[VO₂{(S-benzyl-3-(2-hydroxy-5-nitrophenyl) methylene dithiocarbazate)}] (212). Dioxovanadium(V) complexes K[VO₂{(S-methyl-3-(2-hydroxy-5-nitrophenyl)methylenedithiocarbazate)}] (211) and 212 have been tested for antibacterial activity against Burkholderia pseudomallei and Burkholderia mallei strains. Ceftazidime was used as a reference …
Effects Of Virtualization In Database Benchmarking, Jigarkumar Jayantibhai Rathod
Effects Of Virtualization In Database Benchmarking, Jigarkumar Jayantibhai Rathod
Theses and Dissertations
Many applications are being deployed on the cloud because virtualization provides inexpensive virtual machines which are easy to create and use. To perform benchmark in scale, one has to rely on virtualization. Virtualization itself, however affects the performance of the database systems. In this thesis, we investigate the unanticipated effects of the virtualization on the database systems by running experiments on virtual machines. The results of our experiments indicate that the performance of a virtual machine is highly influenced by the host machine.
Initial{Boundary And Nonlocal Boundary Value Problems For Higher Order Nonlinear Hyperbolic Equations With Two Independent Variables, Raja Ben-Rabha
Initial{Boundary And Nonlocal Boundary Value Problems For Higher Order Nonlinear Hyperbolic Equations With Two Independent Variables, Raja Ben-Rabha
Theses and Dissertations
Boundary value problems in a characteristic rectangle for nonlinear hyperbolic equations of higher order are considered. The concept of strong well–posedness of a boundary value problem is introduced. For initial–boundary value problems there are established: (i) Necessary and sufficient conditions of strong well–posedness; (ii) Unimprovable sufficient conditions of local and global solvability; (iii) Effective sufficient conditions of solvability of two–point, multi–point, periodic and Dirichlet type problems; (iv) Sharp a priori estimates of solutions of ill–posed initial–boundary value problems; (v) Unimprovable conditions guaranteeing unique solvability of ill–posed initial–boundary value problems. For nonlocal boundary value problems there are established: (i) Necessary and …
Language Relations On Twitter: A Network Science Approach, Priya Saha
Language Relations On Twitter: A Network Science Approach, Priya Saha
Theses and Dissertations
Online social networks (e.g., Twitter and Facebook) play a vital role in the spreading of information in today’s world. Interestingly, the spread of information is enabled by the existence of an underlying connectivity of the users. One factor influencing the online connectivity, which only recently has been receiving attention, is the language used by the user in his or her activities. The understanding of information propagation from the perspective of languages is of particular interest because we live in a world with a very diverse set of languages. Using Network Science approaches, we demonstrate that Twitter users have a strong …
On The Classification Of The Second Minimal Orbits Of The Continuous Endomorphisms On The Real Line And Universality In Chaos, Naveed H. Iqbal
On The Classification Of The Second Minimal Orbits Of The Continuous Endomorphisms On The Real Line And Universality In Chaos, Naveed H. Iqbal
Theses and Dissertations
This dissertation presents full classification of second minimal odd periodic orbits of a continuous endomorphisms on the real line. A (2k + 1)-periodic orbit (k ≥ 3) is called second minimal for the map f , if 2k−1 is a minimal period of f in the Sharkovskii ordering. We prove that there are 4k−3 types of second minimal (2k+1)-orbits, each characterized with unique cyclic permutation and directed graph of transitions with accuracy up to inverses. The result is applied to the problem on the distribution of periodic windows within the chaotic regime of the bifurcation diagram of the one-parameter family …