A Bit Like Cash: Understanding Cash-For-Bitcoin Transactions Through Individual Vendors,
2018
University of Central Oklahoma
A Bit Like Cash: Understanding Cash-For-Bitcoin Transactions Through Individual Vendors, Stephanie J. Robberson, Mark R. Mccoy
Journal of Digital Forensics, Security and Law
As technology improves and economies become more globalized, the concept of currency has evolved. Bitcoin, a cryptographic digital currency, has been embraced as a secure and convenient type of money. Due to its security and privacy for the user, Bitcoin is a good tool for conducting criminal trades. The Financial Crimes Enforcement Network (FinCEN) has regulations in place to make identification information of Bitcoin purchasers accessible to law enforcement, but enforcing these rules with cash-for-Bitcoin traders is difficult. This study surveyed cash-for-Bitcoin vendors in Oklahoma, Texas, Arkansas, Missouri, Kansas, Colorado, and New Mexico to determine personal demographic information, knowledge of ...
Using Cyclical Components To Improve The Forecasts Of The Stock Market And Macroeconomic Variables,
2018
Curtin University Malaysia
Using Cyclical Components To Improve The Forecasts Of The Stock Market And Macroeconomic Variables, Kenneth R. Szulczyk, Shibley Sadique
Journal of Modern Applied Statistical Methods
Economic variables such as stock market indices, interest rates, and national output measures contain cyclical components. Forecasting methods excluding these cyclical components yield inaccurate out-of-sample forecasts. Accordingly, a three-stage procedure is developed to estimate a vector autoregression (VAR) with cyclical components. A Monte Carlo simulation shows the procedure estimates the parameters accurately. Subsequently, a VAR with cyclical components improves the root-mean-square error of out-of-sample forecasts by 50% for a stock market model with macroeconomic variables.
Using Coherent Phonons For Ultrafast Control Of The Dirac Node Of Srmnsb2,
2018
Santa Clara University
Using Coherent Phonons For Ultrafast Control Of The Dirac Node Of Srmnsb2, Christopher P. Weber, Madison G. Masten, Thomas C. Ogloza, Bryan S. Berggren, Michael K. L. Man, Keshav M. Dani, Jinyu Liu, Zhiqiang Mao, Dennis D. Klug, Adebayo A. Adeleke, Yansun Yao
Physics
SrMnSb2 is a candidate Dirac semimetal whose electrons near the Y point have the linear dispersion and low mass of a Dirac cone. Here we demonstrate that ultrafast, 800-nm optical pulses can launch coherent phonon oscillations in Sr0.94Mn0.92Sb2, particularly an Ag mode at 4.4 THz. Through first-principles calculations of the electronic and phononic structure of SrMnSb2, we show that high-amplitude oscillations of this mode would displace the atoms in a way that transiently opens and closes a gap at the node of the Dirac cone. The ability to control ...
Land-Use/Land-Cover Changes And Their Influence On The Ecosystem In Chengdu City, China During The Period Of 1992–2018,
2018
Chinese Academy of Sciences
Land-Use/Land-Cover Changes And Their Influence On The Ecosystem In Chengdu City, China During The Period Of 1992–2018, Xiaojuan Lin, Min Xu, Chunxiang Cao, Ramesh P. Singh, Wei Chen, Hongrun Ju
Mathematics, Physics, and Computer Science Faculty Articles and Research
Due to urban expansion, economic development, and rapid population growth, land use/land cover (LULC) is changing in major cities around the globe. Quantitative analysis of LULC change is important for studying the corresponding impact on the ecosystem service value (ESV) that helps in decision-making and ecosystem conservation. Based on LULC data retrieved from remote-sensing interpretation, we computed the changes of ESV associated with the LULC dynamics using the benefits transfer method and geographic information system (GIS) technologies during the period of 1992–2018 following self-modified coefficients which were corrected by net primary productivity (NPP). This improved approach aimed to ...
Positive And Z-Operators On Closed Convex Cones,
2018
University of Maryland Baltimore County
Positive And Z-Operators On Closed Convex Cones, Michael J. Orlitzky
Electronic Journal of Linear Algebra
Let $K$ be a closed convex cone with dual $\dual{K}$ in a finite-dimensional real Hilbert space. A \emph{positive operator} on $K$ is a linear operator $L$ such that $L\of{K} \subseteq K$. Positive operators generalize the nonnegative matrices and are essential to the Perron-Frobenius theory. It is said that $L$ is a \emph{\textbf{Z}-operator} on $K$ if % \begin{equation*} \ip{L\of{x}}{s} \le 0 \;\text{ for all } \pair{x}{s} \in \cartprod{K}{\dual{K}} \text{ such that } \ip{x}{s} = 0. \end{equation*} % The \textbf{Z}-operators are generalizations of \textbf{Z ...
Spectral Bounds For The Connectivity Of Regular Graphs With Given Order,
2018
Maastricht University
Spectral Bounds For The Connectivity Of Regular Graphs With Given Order, Aida Abiad, Boris Brimkov, Xavier Martinez-Rivera, Suil O, Jingmei Zhang
Electronic Journal of Linear Algebra
The second-largest eigenvalue and second-smallest Laplacian eigenvalue of a graph are measures of its connectivity. These eigenvalues can be used to analyze the robustness, resilience, and synchronizability of networks, and are related to connectivity attributes such as the vertex- and edge-connectivity, isoperimetric number, and characteristic path length. In this paper, two upper bounds are presented for the second-largest eigenvalues of regular graphs and multigraphs of a given order which guarantee a desired vertex- or edge-connectivity. The given bounds are in terms of the order and degree of the graphs, and hold with equality for infinite families of graphs. These results ...
Bounded Linear Operators That Preserve The Weak Supermajorization On $\Ell^1(I)^+$,
2018
Faculty of Mechanical Engineering, Department of Mathematics,University of Niš, Serbia
Bounded Linear Operators That Preserve The Weak Supermajorization On $\Ell^1(I)^+$, Martin Z. Ljubenović, Dragan S. Djordjevic
Electronic Journal of Linear Algebra
Linear preservers of weak supermajorization which is defined on positive functions contained in the discrete Lebesgue space $\ell^1(I)$ are characterized. Two different classes of operators that preserve the weak supermajorization are formed. It is shown that every linear preserver may be decomposed as sum of two operators from the above classes, and conversely, the sum of two operators which satisfy an additional condition is a linear preserver. Necessary and sufficient conditions under which a bounded linear operator is a linear preserver of the weak supermajorization are given. It is concluded that positive linear preservers of the weak supermajorization ...
Of Mice And Math: Four Models, Four Collaborations.,
2018
Pomona College
Of Mice And Math: Four Models, Four Collaborations., Ami Radunskaya
Annual Symposium on Biomathematics and Ecology: Education and Research
No abstract provided.
Novel Cell-Based Model Of The Generation And Maintenance Of The Shape And Structure Of The Multi-Layered Shoot Apical Meristem Of Arabidopsis Thaliana,
2018
University of California, Riverside
Novel Cell-Based Model Of The Generation And Maintenance Of The Shape And Structure Of The Multi-Layered Shoot Apical Meristem Of Arabidopsis Thaliana, Mikahl Banwarth-Kuhn, Ali Nematbakhsh, Stephen Snipes, Kevin Rodriguez, Carolyn Rasmussen, G. Venugopala Reddy, Mark Alber
Annual Symposium on Biomathematics and Ecology: Education and Research
No abstract provided.
Theory On Thermodynamic Constraints To Biogeochemical And Metabolic Diversity,
2018
Arizona State University
Theory On Thermodynamic Constraints To Biogeochemical And Metabolic Diversity, Jordan Okie, Everett Shock
Annual Symposium on Biomathematics and Ecology: Education and Research
No abstract provided.
Color Space Standardization And Image Analysis For High-Throughput Phenotyping Of Sorghum Bicolor,
2018
Department of Mathematics, Illinois State University
Color Space Standardization And Image Analysis For High-Throughput Phenotyping Of Sorghum Bicolor, Alexandria A. Pokorny
Annual Symposium on Biomathematics and Ecology: Education and Research
No abstract provided.
A Mathematical Model Of The Inflammatory Response To Pathogen Challenge,
2018
University of Richmond
A Mathematical Model Of The Inflammatory Response To Pathogen Challenge, Lester Caudill, Fiona Lynch
Annual Symposium on Biomathematics and Ecology: Education and Research
No abstract provided.
Transformations On Double Occurrence Words Motivated By Dna Rearrangement,
2018
University of South Florida
Transformations On Double Occurrence Words Motivated By Dna Rearrangement, Daniel Cruz, Margherita Maria Ferrari, Lukas Nabergall, Natasa Jonoska, Masahico Saito
Annual Symposium on Biomathematics and Ecology: Education and Research
No abstract provided.
Analyzing Bigger Networks With Polynomial Algebra,
2018
Portland State University
Analyzing Bigger Networks With Polynomial Algebra, Ian H. Dinwoodie
Annual Symposium on Biomathematics and Ecology: Education and Research
No abstract provided.
Application Of Data Assimilation In Forecasting Of Influenza In The United States,
2018
University of Arizona
Application Of Data Assimilation In Forecasting Of Influenza In The United States, Hannah Biegel
Annual Symposium on Biomathematics and Ecology: Education and Research
No abstract provided.
Semi-Tensor Product Representations Of Boolean Networks,
2018
Illinois State University
Semi-Tensor Product Representations Of Boolean Networks, Matthew Macauley
Annual Symposium on Biomathematics and Ecology: Education and Research
No abstract provided.
Modeling The Transmission Of Wolbachia In Mosquitoes For Controlling Mosquito-Borne Diseases,
2018
Illinois State University
Modeling The Transmission Of Wolbachia In Mosquitoes For Controlling Mosquito-Borne Diseases, Zhuolin Qu
Annual Symposium on Biomathematics and Ecology: Education and Research
No abstract provided.
The Influence Of Canalization On The Robustness Of Finite Dynamical Systems,
2018
Illinois State University
The Influence Of Canalization On The Robustness Of Finite Dynamical Systems, Claus Kadelka
Annual Symposium on Biomathematics and Ecology: Education and Research
No abstract provided.
Using Canalization For The Control Of Discrete Networks,
2018
University of Kentucky
Using Canalization For The Control Of Discrete Networks, David Murrugarra
Annual Symposium on Biomathematics and Ecology: Education and Research
No abstract provided.
Modeling Influenza Outbreaks On A College Campus,
2018
University of Colorado Boulder
Modeling Influenza Outbreaks On A College Campus, Eli Goldwyn, Subekshya Bidari
Annual Symposium on Biomathematics and Ecology: Education and Research
No abstract provided.
