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Extensions And Topological Conditions Of Nj Rings, Meimei Jiang, Yao Wang, Yanli Ren

Turkish Journal of Mathematics

A ring $R$ is said to be NJ if $J(R)=N(R)$. This paper mainly studies the relationship between NJ rings and related rings, and investigates the Dorroh extension, the Nagata extension, the Jordan extension, and some other extensions of NJ rings. At the same time, we also prove that if $R$ is a weakly 2-primal $\alpha$-compatible ring with an isomorphism $\alpha$ of $R$, then $R[x;\alpha]$ is NJ; if $R$ is a weakly 2-primal $\delta$-compatible ring with a derivation $\delta$ of $R$, then $R[x;\delta]$ is NJ. Moreover, we consider some topological conditions for NJ rings and show for a NJ ring $R$ …

Degenerate Maximal Hyponormal Differential Operators For The First Order, Meltem Sertbaş, Fati̇h Yilmaz

Turkish Journal of Mathematics

In this study, all maximal hyponormal extensions are given for the degenerate first order in the Hilbert space of vector-functions on a finite interval. The extensions are defined in terms of the boundary values. The structure of the spectrum of the maximal hyponormal extensions is also investigated.

The $X$-Coordinates Of Pell Equations And Padovan Numbers, Salah Eddine Rihane, Mohand Ouamar Hernane, Alain Togbe

Turkish Journal of Mathematics

In this paper, we show that there is at most one value of the positive integer $X$ participating in the Pell equation $X^2-dY^2=k$, where $k\in\{\pm1,\pm4\}$, which is a Padovan number, with a few exceptions that we completely characterize.

A Neutral Relation Between Metallic Structure And Almost Quadratic $\Phi $-Structure, Si̇nem Gönül, İrem Küpeli̇ Erken, Azi̇z Yazla, Cengi̇zhan Murathan

Turkish Journal of Mathematics

In this paper, we give a neutral relation between metallic structure and almost quadratic metric $\phi $-structure. Considering $N$ as a metallic Riemannian manifold, we show that the warped product manifold $\mathbb{R} \times _{f}N$ has an almost quadratic metric $\phi $-structure. We define Kenmotsu quadratic metric manifolds, which include cosymplectic quadratic manifolds when $\beta =0$. Then we give nice almost quadratic metric $\phi $-structure examples. In the last section, we construct a quadratic $\phi $-structure on the hypersurface $M^{n}$ of a locally metallic Riemannian manifold $\tilde{M}^{n+1}.$

Enveloping Algebras Of Color Hom-Lie Algebras, Abdoreza Armakan, Sergei Silvestrov, Mohammad Reza Farhangdoost

Turkish Journal of Mathematics

In this paper, the universal enveloping algebra of color hom-Lie algebras is studied. A construction of the free involutive hom-associative color algebra on a hom-module is described and applied to obtain the universal enveloping algebra of an involutive hom-Lie color algebra. Finally, the construction is applied to obtain the well-known Poincaré-Birkhoff-Witt theorem for Lie algebras to the enveloping algebra of an involutive color hom-Lie algebra.

Properties In $L_P$ Of Root Functions For A Nonlocal Problem With Involution, Leonid Kritskov, Makhmud Sadybekov, Abdizhahan Sarsenbi

Turkish Journal of Mathematics

The spectral problem $-u''(x)+\alpha u''(-x)=\lambda u(x)$, $-1$%lt; $x$ < $1$, with nonlocal boundary conditions $u(-1)=\beta u(1)$, $u'(-1)=u'(1)$, is studied in the spaces $L_p(-1,1)$ for any $\alpha\in (-1,1)$ and $\beta\ne\pm 1$. It is proved that if $r=\sqrt{(1-\alpha)/(1+\alpha)}$ is irrational then the system of its eigenfunctions is complete and minimal in $L_p(-1,1)$ for any $p>1$, but does not form a basis. In the case of a rational value of $r$, the way of supplying this system with associated functions is specified to make all the root functions a basis in $L_p(-1,1)$.

On Linear Dynamics Of Sets Of Operators, Mohamed Amouch, Otmane Benchiheb

Turkish Journal of Mathematics

Let $X$ be a complex topological vector space with $dim(X)>1$ and $\mathcal{B}(X)$ the set of all continuous linear operators on $X$. The concept of hypercyclicity for a subset of $\mathcal{B}(X)$ was introduced in [1]. In this work, we introduce the notion of hypercyclic criterion for a subset of $\mathcal{B}(X)$. We extend some results known for a single operator and $C_0$-semigroup to a subset of $\mathcal{B}(X)$ and we give applications for $C$-regularized groups of operators.

On Product Complex Finsler Manifolds, Hongchuan Xia, Qian Wei

Turkish Journal of Mathematics

Let $(M, F)$ be the product complex Finsler manifold of two strongly pseudoconvex complex Finsler manifolds $(M_1, F_1)$ and $(M_2, F_2)$ with $F=\sqrt{f(K, H)}$ and $K=F_1^2$, $H=F_2^2$. In this paper, we prove that $(M, F)$ is a weakly Käahler-Finsler (resp. weakly complex Berwald) manifold if and only if $(M_1, F_1)$ and $(M_2, F_2)$ are both weakly Kähler-Finsler (resp. weakly complex Berwald) manifolds, which is independent of the choice of function $f$. Meanwhile, we prove that $(M, F)$ is a complex Landsberg manifold if and only if either $(M_1, F_1)$ and $(M_2, F_2)$ are both complex Landsberg manifolds and $f=c_1K+c_2H$ with …

Properties Of A Generalized Class Of Analytic Functions With Coefficient Inequality, Ben Wongsaijai, Nattakorn Sukantamala

Turkish Journal of Mathematics

Let $(\beta_n)_{n\ge 2}$ be a sequence of nonnegative real numbers and $\delta$ be a positive real number. We introduce the subclass $\mathcal{A}(\beta_n,\delta)$ of analytic functions, with the property that the Taylor coefficients of the function $f$ satisfies $\sum_{n\ge2}^{\infty}\beta_n a_n \le \delta$, where $f(z)=z+\sum_{n=2}^{\infty}a_nz^n$. The class $\mathcal{A}(\beta_n,\delta)$ contains nonunivalent functions for some choices of $(\beta_n)_{n\ge 2}$. In this paper, we provide some general properties of functions belonging to the class $\mathcal{A}(\beta_n,\delta)$, such as the radii of univalence, distortion theorem, and invariant property. Furthermore, we derive the best approximation of an analytic function in such class by using the semiinfinite quadratic programming. …

Some General Results On Fractional Banach Sets, Faruk Özger

Turkish Journal of Mathematics

The gamma function which is expressed by an improper integral is used to establish the fractional difference operators and fractional Banach sets. In this study, we achieve some comprehensive and complementary results related to characterizations of the matrix classes of fractional Banach sets. We also obtain some identities or inequalities for the Hausdorff measure of noncompactness of the corresponding matrix operators, and finally find the necessary and sufficient conditions for those matrix operators to be compact.

A Bernstein-Type Theorem For $\Xi$-Submanifolds Withflat Normal Bundle In The Euclidean Spaces, Xu-Yong Jiang, He-Jun Sun, Peibiao Zhao

Turkish Journal of Mathematics

$\xi$-Submanifolds in the Euclidean spaces are a natural extension of self-shrinkers and a generalization of $\lambda$-hypersurfaces. Moreover, $\xi$-submanifolds are expected to take the place of submanifolds with parallel mean curvature vector. In this paper, we establish a Bernstein-type theorem for $\xi$-submanifolds in the Euclidean spaces. More precisely, we prove that an $n$-dimensional smooth graphic $\xi$-submanifold with flat normal bundle in $\mathbb{R}^{n+p}$ is an affine $n$-plane.

Converse Theorems In Lyapunov's Second Method And Applications For Fractional Order Systems, Javier Gallegos, Manuel Duarte-Mermoud

Turkish Journal of Mathematics

We establish a characterization of the Lyapunov and Mittag-Leffler stability through (fractional) Lyapunov functions, by proving converse theorems for Caputo fractional order systems. A hierarchy for the Mittag-Leffler order convergence is also proved which shows, in particular, that fractional differential equation with derivation order lesser than one cannot be exponentially stable. The converse results are then applied to show that if an integer order system is (exponentially) stable, then its corresponding fractional system, obtained from changing its differentiation order, is (Mittag-Leffler) stable. Hence, available integer order control techniques can be disposed to control nonlinear fractional systems. Finally, we provide examples …

On The Cover Ideals Of Chordal Graphs, Nursel Erey

Turkish Journal of Mathematics

The independence complex of a chordal graph is known to be shellable which is equivalent to the fact that cover ideal of a chordal graph has linear quotients. We use this result to obtain recursive formulas for the Betti numbers of cover ideals of chordal graphs. Moreover, we give a new proof of such result which yields different shellings of the independence complex.

A Circulant Functional Equation For The Additive Function And Its Stability, Vichian Laohakosol, Watcharapon Pimsert, Kanet Ponpetch

Turkish Journal of Mathematics

A general solution of a matrix functional equation involving circulant matrices of the additive function is determined, and its stability is established.

The Perceived Appeal, Challenge, And Learning Choice For Gifted And Talented Students In Advanced Placement Mathematics Courses, Emma Marie Denise Biggs

Theses and Dissertations

The Advanced Placement program has undergone many changes since its post Sputnik surge when it was designed to accelerate learners. The number of students enrolled in AP courses has swelled, demographics of participants have diversified, and course curriculums and designs have altered. The homogenous Ivy League bound population of gifted and talented students who made up the initial 1,299 students enrolled in the program has morphed into a heterogeneous population of over 2,800,000 students with many learning needs. With the increase in the testing culture of the United States, the focus in education has shifted towards closing the achievement gap …

Chemometric Applications In Fire Debris Analysis: Likelihood Ratios From Naive Bayes And Frequency Of Component And Pyrolysis Product Occurrence, Anuradha Akmeemana

Electronic Theses and Dissertations

One of the major challenges in fire investigation is the determination of the cause of fire. The fire can be accidental or intentional. The determination of ignitable liquid residue (ILR) from fire debris helps the process and this process is called fire debris analysis in forensic science. This is one of the most complex areas in the field of forensics because of the evaporation of the ILR from the debris and the interference of the substrate matrix with the ILR if present. In the present, the final decisions in fire debris analysis are based on categorical statements and it only …

A Statistical Analysis And Machine Learning Of Genomic Data, Jongyun Jung

All Graduate Theses, Dissertations, and Other Capstone Projects

Machine learning enables a computer to learn a relationship between two assumingly related types of information. One type of information could thus be used to predict any lack of informaion in the other using the learned relationship. During the last decades, it has become cheaper to collect biological information, which has resulted in increasingly large amounts of data. Biological information such as DNA is currently analyzed by a variety of tools. Although machine learning has already been used in various projects, a flexible tool for analyzing generic biological challenges has not yet been made. The recent advancements in the DNA …

Adaptive Smoothing Parameter In Kernel Density Estimation And Parameter Estimation In Normal Mixture Distributions, Sabiha Mahzabeen

All Graduate Theses, Dissertations, and Other Capstone Projects

Kernel density estimation is a widely used tool in nonparametric density estimation procedures. Choice of a kernel function and a smoothing parameter are two important issues in implementing kernel density estimation procedures. In this paper, four different kernel functions are considered in implementing an adaptive selection procedure in choosing the smoothing parameter. In simulation, a skewed bimodal density which is a mixture of two normal distributions is considered along with the standard normal and the standard exponential densities. In skewed bimodal data, parameter estimation is also explored in the context of the parameter estimation in mixtures of normal distributions. Maximum …

The Pre-Roche Lobe Overflow Evolution Of Massive Close Binary Stars: A Study Of Rotation, Wind Enhanced Mass-Loss, And The Bi-Stability Jump, Thomas C. Gehrman Jr.

All Graduate Theses, Dissertations, and Other Capstone Projects

Massive stars have the ability to enrich their environment with heavy elements and influence star formation in galaxies. Some massive stars exist in binary systems with short orbital periods. These are called massive close binaries. It is important to understand the evolution of massive close binary systems to gain insight about galaxy evolution. Massive stars above 20 solar masses experience a bi-stability jump where there is a sudden increase in mass-loss rate in their winds. There is ongoing research in this field, but the study of the bi-stability jump and its effects on massive close binary star properties has not …

Strategies Hospital Administrators Utilize To Optimize Patient Services, Vicente Njoku

Walden Dissertations and Doctoral Studies

Hospital administrators face challenges that arise from environmental factors or psychosocial factors, and lack resources to deliver valuable medical services to stakeholders, including patients and employees. A multicase study served to explore experiences and gain a broader perspective of hospital administrators' use of strategies to optimize patient services. Ten hospital administrators from acute care hospitals in Nevada and California were purposefully selected from the population of hospital managers with a minimum of 2 years of documented experience in successfully implementing management strategies to improve patient services. The conceptual framework was Drucker's management theory. Data were collected from semistructured interviews with …

Wage And Property Income, Anwar Shaikh Phd

Archives of Anwar Shaikh

This collection includes:

• Folder Cover Label
  Shaikh, A. (2019). Wage & property income. Department of Economics, New School for Social Research.
  This item is a label on a blue folder. It marks papers about wages and property wealth.
• Textbook Chapter Excerpt
  Casella, G., & Berger, R. L. (1990). Statistical inference. Wadsworth & Brooks/Cole Advanced Books & Software.
  This item is a chapter from a statistics textbook. It explains how math rules change random numbers. It tells how to find averages.
• Handwritten Research Notes
  Shaikh, A. (2019, January 11). Non-linear + log-log property. Department of Economics, New School …

Assessment Of Adaptability Of A Supply Chain Trading Agent’S Strategy: Evolutionary Game Theory Approach, Yoon Sang Lee, Riyaz T. Sikora

Journal of International Technology and Information Management

With the increase in the complexity of supply chain management, the use of intelligent agents for automated trading has gained popularity (Collins, Arunachalam, B, et al. 2006). The performance of supply-chain agents depends on not just the market environment (supply and demand patterns) but also on what types of other agents they are competing with. For designers of such agents it is important to ascertain that their agents are robust and can adapt to changing market and competitive environments. However, to date there has not been any work done that assesses the adaptability of a trading agent’s strategy in the …

This Is Your Brain On Music: The Study Of Musical Influence On The Cognitive Mindset And Learning, Allysa N. Lipsey

Honors Theses

This thesis examines the use of musical influence on the brain with an emphasis on the effects on cognitive mindset and learning in mathematics education. It explores the idea of the use of different trials and methods to potentially unlock new knowledge about the brain through listening to music during in-class group work, individual work, and class assessments. It allows for an analysis of the music’s effect on the brain and creates discussion in multiple classrooms and age groups through the eyes of a participant observer in an ethnographic research scenario. By analyzing behaviors of body language, musical taste and …

Measurements Of The Primary Bjerknes Force In A Cavitating Ultrasonic Field, Mason Smith

Honors Theses

Cavitation is the result when there are rapid changes in pressure in a liquid. These vapor-filled cavities can occur when ultrasound propagates through water at sufficient power. The volumes of these cavities can pulsate and can even couple with the radiation pressure from the ultrasound. The result is a translational force on the bubbles. This translational force on the bubble is called the primary Bjerknes force. The secondary Bjerknes force is the result of two pulsating cavities, but this force is ignored since the buoyant force and the primary Bjerknes force are the dominant forces. Immediately before a bubble begins …

Renewables & Refugees: A Solution For Jordan, Lauren Burns

Honors Theses

As the Hashemite Kingdom of Jordan continues to host the third largest Syrian refugee population in the world, the state’s infrastructure and its people are taking a toll. Before the war in Syria began, Jordan was already suffering from a weak economy, resource scarcity, and an enormous population boom. Since accepting nearly 2.5 million refugees, these issues have compounded year after year—nearly reaching a breaking point. I propose an unconventional solution to some aspects of the refugee crisis: renewable energy. Renewables are cheaper than fossil fuels, consume less water in electricity generation, emit fewer greenhouse gases, and promote job creation …

Economic Advancement Across The European Playing Field, Zac Herring

Honors Theses

This project seeks to examine the relationship between economic history, soccer, and economic institutions in countries who have attained varying levels of success on the soccer field and economically. The work of several influential scholars in recent decades has drawn attention to the need for a shift in the goal for economic achievement from industrialization to institutional effectiveness. This study develops a model to further understand the relationship between economic achievement and soccer success. It then includes case studies of three countries from the model in order to further understand the impact of the institutions that have a significant presence …

A Comprehensive Review Of Accounting And Financial Reporting Principles, Nicholas Egorshin

Honors Theses

The following Thesis is comprised of twelve case studies that were completed over one year in the course ACCY 420. This course, led by Dr. Victoria Dickinson, challenged students to dive deeper into accounting concepts and principles through the analysis of financial statements presented from real companies. The companies analyzed do business in a variety of industries and disciplines, so students were able to see the accounting process through a multitude of lenses. Some companies examined used foreign currency and adhered to International Accounting policies, so analysis and critical thinking skills were necessary in truly understanding the significance of the …

Dworkinian Liberalism, The Right To Pornography, And The Internet, Will Nowell

Honors Theses

In a 1981 journal article, “Is There A Right to Pornography?,” Ronald Dworkin argues that we have a right to ethical independence that includes the right to consume pornography. The purpose of this thesis is to inquire as to whether Dworkinian liberalism does entail a right to specifically internet pornography. This research is primarily focused on Ronald Dworkin’s writings in Justice for Hedgehogs, Sovereign Virtue: The Theory and Practice of Equality, and Taking Rights Seriously to describe the principles and character of Dworkinian liberalism and its philosophical relationship to the question of the right to pornography. This thesis considers contemporary …

Emerging Policy And Practice Issues (2018), Steven L. Schooner, David Berteau

GW Law Faculty Publications & Other Works

This paper/chapter, presented at the Thomson Reuters Government Contracts Year in Review Conference (covering 2018), attempts to identify the key evolving trends and issues in U.S. federal procurement for 2018 and beyond. Consistent with prior practice, this chapter offers extensive coverage of the federal procurement, grant, and defense spending trends and attempts to predict what lies ahead, particularly with regard to legislative and executive activity. This year's paper discusses, among other things, the high degree of uncertainty currently being experienced in the public procurement sphere, dramatic increases to the micro-purchase and simplified acquisition thresholds, the work of the Congressionally-mandated Section …

Analyzing Happiness: Investigation On Happy Moments Using A Bag-Of-Words Approach And Related Ethical Discussions, Riddhiman Adib, Eyad Aldawood, Nathan Lang, Nina Lasswell, Shion Guha

Computer Science Faculty Research and Publications

In this research paper, we analyzed what moments and activities make people happy, based on a collection of happy moments. We are focusing on specific happy moments from a collection of text responses that people have shared through the crowd-sourcing platform: Amazon Mechanical Turk (MTurk). Using crowd-sourcing to collect our data allows us to advance our understanding of the cause of happiness, by focusing on words and real human experiences. Workers of MTurk were asked to reflect on what makes them happy in a given period and share three specific moments in complete sentences. Through text-based analysis, we will look …