Physical Sciences and Mathematics Commons™

All Articles in Physical Sciences and Mathematics

154141 full-text articles. Page 1 of 3758.

In Operando Mechanism Analysis On Nanocrystalline Silicon Anode Material For Reversible And Ultrafast Sodium Storage, 2018 University of Wollongong

In Operando Mechanism Analysis On Nanocrystalline Silicon Anode Material For Reversible And Ultrafast Sodium Storage, Lei Zhang, Xianluo Hu, Chaoji Chen, Haipeng Guo, Xiaoxiao Liu, Gengzhao Xu, Haijian Zhong, Shuang Cheng, Peng Wu, Jiashen Meng, Yunhui Huang, Shi Xue Dou, Hua-Kun Liu

Australian Institute for Innovative Materials - Papers

Presently, lithium-ion batteries (LIBs) are the most promising commercialized electrochemical energy storage systems. Unfortunately, the limited resource of Li results in increasing cost for its scalable application and a general consciousness of the need to find new type of energy storage technologies. Very recently, substantial effort has been invested to sodium-ion batteries (SIBs) due to their effectively unlimited nature of sodium resources. Furthermore, the potential of Li/Li+ is 0.3 V lower than that of Na/Na+, which makes it more effective to limit the electrolyte degradation on the outer surface of the electrode.[1] Nevertheless, one major obstacle ...

Cybercrime Deterrence And International Legislation: Evidence From Distributed Denial Of Service Attacks, 2017 Singapore Management University

Cybercrime Deterrence And International Legislation: Evidence From Distributed Denial Of Service Attacks, Kai-Lung Hui, Seung Hyun Kim, Qiu-Hong Wang

Research Collection School Of Information Systems

In this paper, we estimate the impact of enforcing the Convention on Cybercrime (COC) on deterring distributed denial of service (DDOS) attacks. Our data set comprises a sample of real, random spoof-source DDOS attacks recorded in 106 countries in 177 days in the period 2004-2008. We find that enforcing the COC decreases DDOS attacks by at least 11.8 percent, but a similar deterrence effect does not exist if the enforcing countries make a reservation on international cooperation. We also find evidence of network and displacement effects in COC enforcement. Our findings imply attackers in cyberspace are rational, motivated by ...

Elimination For Systems Of Algebraic Differential Equations, 2017 The Graduate Center, City University of New York

Elimination For Systems Of Algebraic Differential Equations, Richard Gustavson

All Graduate Works by Year: Dissertations, Theses, and Capstone Projects

We develop new upper bounds for several effective differential elimination techniques for systems of algebraic ordinary and partial differential equations. Differential elimination, also known as decoupling, is the process of eliminating a fixed subset of unknown functions from a system of differential equations in order to obtain differential algebraic consequences of the original system that do not depend on that fixed subset of unknowns. A special case of differential elimination, which we study extensively, is the question of consistency, that is, if the given system of differential equations has a solution. We first look solely at the algebraic data" of ...

2017 The Graduate Center, City University of New York

Diophantine Approximation And The Atypical Numbers Of Nathanson And O'Bryant, David Seff

For any positive real number $\theta > 1$, and any natural number $n$, it is obvious that sequence $\theta^{1/n}$ goes to 1. Nathanson and O'Bryant studied the details of this convergence and discovered some truly amazing properties. One critical discovery is that for almost all $n$, $\displaystyle\floor{\frac{1}{\fp{\theta^{1/n}}}}$ is equal to $\displaystyle\floor{\frac{n}{\log\theta}-\frac{1}{2}}$, the exceptions, when $n > \log_2 \theta$, being termed atypical $n$ (the set of which for fixed $\theta$ being named $\mcA_\theta$), and that for $\log\theta$ rational, the number of atypical $n ... Selecting Link Resolver And Knowledge Base Software: Implications Of Interoperability, 2017 James Madison University Selecting Link Resolver And Knowledge Base Software: Implications Of Interoperability, Cyndy Chisare, Jody C. Fagan, David J. Gaines, Michael Trocchia Libraries Link resolver software and their associated knowledge bases are essential technologies for modern academic libraries. However, because of the increasing number of possible integrations involving link resolver software and knowledge bases, a library’s vendor relationships, product choices, and consortial arrangements may have the most dramatic effects on the user experience and back-end maintenance workloads. A project team at a large comprehensive university recently investigated link resolver products in an attempt to increase efficiency of back-end workflows while maintaining or improving the patron experience. The methodology used for product comparison may be useful for other libraries. 2017 Embry-Riddle Aeronautical University - Daytona Beach Book Review: Shoot The Moon: A Complete Guide To Lunar Imaging, T. D. Oswalt Publications This document is Dr. Oswalt’s review of Shoot the Moon: a Complete Guide to Lunar Imaging by Dupont-Bloch, Nicolas. Cambridge, 2016, 323 p index, 9781107548442$39.95, 9781316657867 \$32.00.

Mechanistic Mathematical Models: An Underused Platform For Hpv Research, 2017 George Washington University

Mechanistic Mathematical Models: An Underused Platform For Hpv Research, Marc Ryser, Patti Gravitt, Evan R. Myers

Global Health Faculty Publications

Health economic modeling has become an invaluable methodology for the design and evaluation of clinical and public health interventions against the human papillomavirus (HPV) and associated diseases. At the same time, relatively little attention has been paid to a different yet complementary class of models, namely that of mechanistic mathematical models. The primary focus of mechanistic mathematical models is to better understand the intricate biologic mechanisms and dynamics of disease. Inspired by a long and successful history of mechanistic modeling in other biomedical fields, we highlight several areas of HPV research where mechanistic models have the potential to advance the ...

The Recognition Problem For Table Algebras And Reality-Based Algebras, 2017 University of Regina

The Recognition Problem For Table Algebras And Reality-Based Algebras, Allen Herman, Mikhail Muzychuk, Bangteng Xu

EKU Faculty and Staff Scholarship

Given a finite-dimensional noncommutative semisimple algebra A over C with involution, we show that A always has a basis B for which ( A , B ) is a reality-based algebra. For algebras that have a one-dimensional representation δ , we show that there always exists an RBA-basis for which δ is a positive degree map. We characterize all RBA-bases of the 5-dimensional noncommutative semisimple algebra for which the algebra has a positive degree map, and give examples of RBA-bases of C ⊕ M n ( C ) for which the RBA has a positive degree map, for all n ≥ 2

Compact Dual-Band Bandpass Filter Based On Fractal Stub-Loaded Resonator, 2017 Department of Electrical Engineering, University of Technology, Iraq

Fractal geometries have shown to be a suitable choice for the antenna and microwave circuit designers to produce compact size microwave devices and components. Moreover, the multimode resonators are found advantageous in the design of reduced size multiband bandpass filters. In this paper, a stub loaded resonator (SLR) based on modified Minkowski fractal geometry, is suggested to produce a compact microstrip bandpass filter with dual-band response for wireless communication applications. Based on the second iteration Minkowski fractal geometry, dual-band compact microstrip BPF has been presented. The proposed filter structure is composed of two fractal based symmetrical SLRs. The filter structure ...

Compact Dual-Mode Microstrip Band Reject Filter Based On Koch Fractal Geometry, 2017 Department of Electrical, University of Technology, Iraq

Compact Dual-Mode Microstrip Band Reject Filter Based On Koch Fractal Geometry, Hayder S. Ahmed, Ali J. Salim, Jawad K. Ali

In this paper, a new fractal-based microstrip dual-mode band stop filter (BSF) has been
presented. The proposed filter structure is mainly based on that of the triangular patch resonators
with an embedded slit structure. The Koch fractal geometry has been applied to the uncoupled side
lengths of the triangular patch resonator. The filter structure has been modeled, and its performance
is evaluated using the commercially available EM simulator, Sonnet. Results reveal that the
resulting dual-mode response depends heavily on the uncoupled side lengths of the triangular patch
resonator. A parametric study has been conducted to explore the effect of the ...

A Compact Dual-Band Slot Antenna Based On Koch Fractal Snowflake Annular Ring, 2017 Department of Electrical Engineering, University of Technology, Iraq

A Compact Dual-Band Slot Antenna Based On Koch Fractal Snowflake Annular Ring, Mahmood T. Yassen, Mohammed R. Hussan, Hussain A. Hammas, Hussam Al-Saedi, Jawad K. Ali

This paper presents the design of a compact dual-band slot antenna for use in the
recently available wireless communication applications. The slot structure of the proposed antenna
is based on an annular slot-ring with Koch snowflake fractal geometry of the third iteration. The
antenna slot structure has been etched on the ground plane of a substrate with relative permittivity
of 4.5 and 1.524 mm thickness. On the other side of the substrate, a 50-Ohm microstrip line has
been etched as the antenna feed structure. The proposed antenna has a compact size of (40 × 40 ×
1.524) mm3. Simulation ...

Uncovering Functional Relationships In Leukemia, 2017 Mathematical Biosciences Institute

Uncovering Functional Relationships In Leukemia, Reginald Mcgee

Biology and Medicine Through Mathematics Conference

No abstract provided.

Exploring An Autoimmune Hair Loss Condition Through Mathematical Modeling And Sensitivity Analysis, 2017 Florida State University

Exploring An Autoimmune Hair Loss Condition Through Mathematical Modeling And Sensitivity Analysis, Atanaska Dobreva, Ralf Paus, Nick Cogan

Biology and Medicine Through Mathematics Conference

No abstract provided.

A Deterministic Model Of The Effect Of Electric Field On Chemotherapeutics Delivery Into A Tumor, 2017 Virginia Polytechnic Institute and State University

A Deterministic Model Of The Effect Of Electric Field On Chemotherapeutics Delivery Into A Tumor, Maryam Moarefian, Luke Achenie

Biology and Medicine Through Mathematics Conference

No abstract provided.

Modeling Hiv Dynamics Following 3bnc117 Antibody Infusion, 2017 Virginia Polytechnic Institute and State University

Modeling Hiv Dynamics Following 3bnc117 Antibody Infusion, Samantha Erwin

Biology and Medicine Through Mathematics Conference

No abstract provided.

Simulating The Evolution Of Skin Melanoma Using Heat Transfer, 2017 Rochester Institute of Technology

Simulating The Evolution Of Skin Melanoma Using Heat Transfer, Ephraim Agyingi

Biology and Medicine Through Mathematics Conference

No abstract provided.

A Mathematical Model Of The Eﬀects Of Resistance Training On Body Composition, 2017 Virginia Commonwealth University

A Mathematical Model Of The Eﬀects Of Resistance Training On Body Composition, Marcella Torres, Angela Reynolds, Eric Trexler, Abbie Smith-Ryan

Biology and Medicine Through Mathematics Conference

No abstract provided.

Interaction Of The Tear Film With The Ocular Surface, 2017 University of Delaware

Interaction Of The Tear Film With The Ocular Surface, Richard J. Braun, Amy Janett, Nicholas Gewecke, Spencer Walker

Biology and Medicine Through Mathematics Conference

No abstract provided.

Modeling Original Antigenic Sin In Dengue Viral Infection, 2017 Virginia Polytechnic Institute and State University

Modeling Original Antigenic Sin In Dengue Viral Infection, Ryan Nikin-Beers

Biology and Medicine Through Mathematics Conference

No abstract provided.

2017 University of Southern California

Adaptive Therapy: Modeling Evolutionary Principles In Anticancer Therapy, Jeffrey B. West

Biology and Medicine Through Mathematics Conference

No abstract provided.