Concepts Of Theory Research Articles

Clinical Implications of Ivabradine in the Contemporary Era.

Ivabradine is a recently introduced inhibitor of the If ion channel, which exhibits the capacity to reduce heart rate while preserving hemodynamic stability. At present, ivabradine finds its clinical indication in patients suffering from heart failure with reduced ejection fraction and maintaining a relative sinus rhythm refractory to beta-blockers. To optimize heart rate control, it is recommended to pursue an aggressive up-titration of ivabradine. This approach may ameliorate tachycardia-induced hypotension by incrementally enhancing cardiac output and allow further up-titration of agents aimed at ameliorating heart failure, such as beta-blockers. Both the modulation of heart rate itself and the up-titration of agents targeting heart failure lead to cardiac reverse remodeling, consequently culminating in a subsequent reduction in mortality and morbidity. A novel overlap theory that our team proposed recently has emerged in recent times. Under trans-mitral Doppler echocardiography, the E-wave and A-wave closely juxtapose one another without any overlapping at the optimal heart rate. Employing echocardiography-guided ivabradine for heart-rate modulation to minimize the overlap between the E-wave and A-wave appears to confer substantial benefits to patients with heart failure. This approach facilitates superior cardiac reverse remodeling and yields more favorable clinical outcomes when compared to those patients who do not receive echocardiography-guided care. The next pertinent issue revolves around the potential expansion of ivabradine's clinical indications to encompass a broader spectrum of diseases. It is imperative to acknowledge that ivabradine may not yield clinically significant benefits in patients afflicted by heart failure with preserved ejection fraction, acute heart failure, sepsis, or stable angina. An important fact yet to be explored is the clinical applicability of ivabradine in patients with atrial fibrillation, a concern that beckons future investigation. In this review, the concept of overlap theory it introduced, along with its application to expand the indication of ivabradine and the overlap theory-guided optimal ivabradine therapy.

Recognizing LBFS trees of bipartite graphs

The graph searches Breadth First Search (BFS) and Depth First Search (DFS) and the spanning trees constructed by them are some of the most basic concepts in algorithmic graph theory. BFS trees are first-in trees, i.e., every vertex is connected to its first visited neighbor. DFS trees are last-in trees, i.e., every vertex is connected to the last visited neighbor before it. The problem whether a given spanning tree can be the first-in tree or last-in tree of a graph search ordering was introduced in the 1980s and has been studied for several graph searches and graph classes. Here, we consider the problem of deciding whether a given spanning tree of a bipartite graph can be a first-in tree or a last-in tree of the Lexicographic Breadth First Search (LBFS), a special variant of BFS that is commonly used in graph algorithms. We show that the recognition of both first-in trees and last-in trees of LBFS is NP-hard even if the start vertex of the search ordering is fixed and the height of the tree is four. We prove that the bound on the height is tight (unless P=NP) by showing that for all spanning trees of bipartite graphs with height smaller than four we can solve both search tree recognition problems of LBFS in polynomial time. Finally, we give a linear-time algorithm that solves both problems for chordal bipartite graphs and fixed start vertices.

When heritage speakers study in their heritage countries

Abstract With a well-established bedrock of literature exploring the benefits of study abroad (SA) in second/foreign/additional language learning contexts (e.g., Anderson et al., 2006; Smith & Mitry, 2008; Williams, 2005), Spanish as a heritage language scholars have only recently begun to explore SA settings (e.g., Pozzi et al., 2021; Quan et al., 2018; Shively, 2018). This short-term longitudinal multiple case study examines the experiences of four Mexican American college students during a SA program in Mexico, their heritage country, and their interplay with their evolving identities. We draw from social identity theory concepts and tools (e.g., Bucholtz & Hall, 2005; Hogg & Abrams, 1988) to compare the students’ individual expectations, experiences, and outcomes of participating in the program. Data were collected using personal reflections and individual interviews at three stages (prior to, during, and after completing the program). Results reveal general positive experiences at the superficial level, with changes in each individual’s ethnic identification, supporting the need to further examine individual differences in future SA research. Finally, drawing from these findings, we make recommendations to prepare students, host families, and instructors to engage practices that will aid in SA program success.

On Estimation of Shannon’s Entropy of Maxwell Distribution Based on Progressively First-Failure Censored Data

Shannon’s entropy is a fundamental concept in information theory that quantifies the uncertainty or information in a random variable or data set. This article addresses the estimation of Shannon’s entropy for the Maxwell lifetime model based on progressively first-failure-censored data from both classical and Bayesian points of view. In the classical perspective, the entropy is estimated using maximum likelihood estimation and bootstrap methods. For Bayesian estimation, two approximation techniques, including the Tierney-Kadane (T-K) approximation and the Markov Chain Monte Carlo (MCMC) method, are used to compute the Bayes estimate of Shannon’s entropy under the linear exponential (LINEX) loss function. We also obtained the highest posterior density (HPD) credible interval of Shannon’s entropy using the MCMC technique. A Monte Carlo simulation study is performed to investigate the performance of the estimation procedures and methodologies studied in this manuscript. A numerical example is used to illustrate the methodologies. This paper aims to provide practical values in applied statistics, especially in the areas of reliability and lifetime data analysis.

Advocacy coalitions as political organizations

Abstract Conceptually, advocacy coalitions are referenced in several policy process theories and frameworks to describe groups of actors that share beliefs and coordinate efforts to influence public policy. In the past decades, advocacy coalitions have received increased attention as a concept and a theoretical approach to understanding collective action in the policy process. In this study, we argue that despite its growing popularity, past empirical research has mainly focused on identifying and describing advocacy coalitions while largely overlooking their role and impact as political organizations. Many of the core premises and assumptions about advocacy coalitions hereby remain understudied and untested. Here, we depart from the Advocacy Coalition Framework (ACF) to discuss the political organization of advocacy coalitions by focusing on four dimensions: (1) a basis for engagement in joint strategies, (2) capacity to mobilize political resources, (3) ability to gain influence in policy processes, and (4) perceptions of advocacy coalitions as a political entity. We briefly review the theory and evidence of each dimension and conclude that several core assumptions about advocacy coalitions yet remain to be empirically tested to enable further conceptual specification and theory development within the ACF and beyond. To this end, we propose a research agenda with suggested research questions, designs, and methodological considerations for advancing empirical research on the role and impact of advocacy coalitions in different cases and contexts.

Development and implementation of Concept-Test questions in abstract algebra

In tertiary mathematics courses, students often have difficulties acquiring an understanding of the mathematical concepts covered. One approach to address this problem is to implement so-called Concept-Tests. These are multiple-choice questions whose distractors represent common problems and misconceptions related to the concepts. While there exist lots of such questions for calculus, Concept-Test questions focusing on basic concepts of abstract algebra are still rare, although previous research has shown that students have many problems with these. We therefore developed such questions for important concepts of basic group and ring theory in the years 2020–2022. In this paper, we first want to present the questions and the developmental process. Furthermore, we want to present an empirical study investigating to what extent the questions helped students in a proof-oriented abstract algebra course to acquire an understanding of the concepts covered. This study especially indicates that the developed Concept-Test questions provided good starting points for conceptual changes.

İlkokul Dönemi Üstün Yetenekli Çocuklar İçin Aday Bildirim Ölçeği (İDABÖ) Geliştirme Çalışması

Introduction: The aim of this study is to develop a teacher nomination scale for gifted students in primary schools. The developed scale is theoretically based on Renzulli’s Three-Ring Conception of Giftedness Theory. Method: In this study, a Teacher Nomination Scale for Gifted Children in Primary Schools (TNSG-P) was developed to identify gifted children attending primary school. The descriptive survey design was used in this study. In study 1, the exploratory factor analysis (EFA) using principal axis method was conducted. In study 2, the confirmatory factor analysis (CFA) using robust maximum likelihood estimation method was carried out. In study 3, the validity of the scale was tested. Findings: A pilot study involving 507 participants was carried out using the 89-item trial form. After the pilot phase, 50 items remained in the scale. A confirmatory factor analysis was conducted on the 50-item scale in a sample of 225 participants. This showed that the fit indices of the scale had a perfect fit and the second level three-factor structure of the scale with 27 items was confirmed. In the validity analysis of the scale, gifted students and typical students were compared and a statistically significant difference was obtained in favor of the gifted students. Cronbach’s α and stratified Cronbach’s α, McDonald’s ω, composite reliability coefficients and average variance extracted (AVE) values regarding the reliability of the scale were also examined. The reliability coefficients for both the overall scale and its subscales were found to be above .95. Discussion: The findings have revealed that the Teacher Nomination Scale for Gifted Children in Primary Schools is a valid assessment instrument and gives reliable scores in identifying gifted children.

Development of DIGaKiT: identifying students’ alternative conceptions by Rasch analysis model

Alternative conceptions become obstacles in physics. However, it is difficult to find instruments that can identify students' alternative conceptions, especially in gases kinetic theory (DIGaKiT). The purpose of this research was to development of diagnostic instrument of DIGaKiT in identifying students’ alternative conceptions by Rasch analysis model. The research method used the defining, designing, developing, and disseminating (4D). The samples are 31 students (12 male students and 19 female students, their ages were typically 16 years old) at one of the senior high schools at Belitung. Rasch analysis was used to identify the validity, reliability, and distribution of students' alternative conceptions. The result is that the level of validity and reliability of the instrument is in a good category. Meanwhile, alternative conceptions of the kinetic theory of gases can be identified in all questions, and the questions with the highest alternative conceptions are questions with code Q11 (77%) and the lowest are questions with codes Q1, Q5, and Q6 (4%). Therefore, teachers must design learning processes that can reduce students’ alternative conceptions of the kinetic theory of gases material.

A Seminar on Prospective Theory Building: The Life-centric Art and Collaborative Science of Appreciative Inquiry as World-making

This article provides a glimpse into a Ph.D. research course on theory building. The seminar is inspired by a holistic interweaving of Appreciative Inquiry and portraiture research; the method of grounded theory; and the great call of our time for future-forming generative theory. In this article we define the umbrella concept of prospective theory and visualize six core constituents for propelling this kind of theory building, while also speaking to what’s been called ‘AI’s lost minor detail’.

Entanglement Monogamy via Multivariate Trace Inequalities

Entropy is a fundamental concept in quantum information theory that allows to quantify entanglement and investigate its properties, for example its monogamy over multipartite systems. Here, we derive variational formulas for relative entropies based on restricted measurements of multipartite quantum systems. By combining these with multivariate matrix trace inequalities, we recover and sometimes strengthen various existing entanglement monogamy inequalities. In particular, we give direct, matrix-analysis-based proofs for the faithfulness of squashed entanglement by relating it to the relative entropy of entanglement measured with one-way local operations and classical communication, as well as for the faithfulness of conditional entanglement of mutual information by relating it to the separably measured relative entropy of entanglement. We discuss variations of these results using the relative entropy to states with positive partial transpose, and multipartite setups. Our results simplify and generalize previous derivations in the literature that employed operational arguments about the asymptotic achievability of information-theoretic tasks.

Culturally Competent Care for Diverse Populations: A Review of Transcultural Nursing Education.

Transcultural nursing is a discipline that emphasizes culturally competent care for diverse populations, recognizing the influence of culture on health beliefs, values, practices, and outcomes. It requires nurses to respect cultural differences and similarities, but faces challenges in curriculum design, faculty development, and student assessment. This paper explores transcultural nursing education's current state and future directions, addressing the American Association of Colleges of Nursing essentials for integrating cultural content into nursing curricula, reviewing Madeleine Leininger's transcultural nursing theory, diversity, equity, and inclusion concepts, and discussing the main challenges of transcultural nursing education, including lack of student diversity, training, and resources. Strategies to overcome these challenges include interprofessional collaboration, cultural immersion, and evidence-based practice. The paper concludes with how emergency department nurses should incorporate this into practice.

Wave amplitude gain within wedge waveguides through scattering by simple obstacles.

Wave confinement, e.g., in waveguides, gives rise to a huge number of distinct phenomena. Among them, amplitude gain is a recurrent and relevant effect in undulatory processes. Using a general purpose protocol to solve wave equations, the boundary wall method, we demonstrate that for relatively simple geometries, namely, a few leaky or opaque obstacles inside a θ wedge waveguide (described by the Helmholtz equation), one can obtain a considerable wave amplification in certain spatially localized regions of the system. The approach relies on an expression for the wedge waveguide exact Green's function in the case of θ=π/M (M=1,2,...), derived through the method of images allied to group theory concepts. The formula is particularly amenable to numerical calculations, greatly facilitating simulations. As an interesting by-product of the present framework, we are able to obtain the eigenstates of certain closed shapes (billiards) placed within the waveguide, as demonstrated for triangular structures. Finally, we briefly discuss possible concrete realizations for our setups in the context of matter and electromagnetic (for some particular modes and conditions) waves.

Evaluation of damage and failure analysis of CPVC pipes

In this paper, the work we have carried out has focused on the failure analysis of CPVC (chlorinated polyvinyl chloride) pipes. We stimulated the damage by notch effect and evaluated its properties using models available in the literature, specifically, the linear damage of Miner, the normalized damage and the unified theory. Burst tests allowed us to obtain ultimate pressure and time parameters for the virgin specimens and the residual parameters for the damaged ones. Then, we analyzed the effect of defect on the mechanical behavior of the studied structures; we found that the mechanical properties of the material were lost as defects increased. An observation and analysis of the pressure drop and thereafter the residual ultimate resistance brings out acceleration from it around the critical depth. Then, an evaluation of the static damage of the studied CPVC pipes was made according to model based on the experimental results of the burst tests and on the modification of the unified theory concepts and the static damage. Indeed, we evaluated the static damage of blank and notched tubes using mainly burst pressure parameters.

Theory of Manu and human qualities in every age according to the Upanishad and Purana literature

Intelligent beings, often referred to as atma or spirit, are described as "atma" in the Upanishads, or as Brahman. Brahman represents the principle of the universe. Seeking guidance, humans turn to the words of God found in the Puranas and Upanishads. The concept of the manu theory and human qualities in different eras is prevalent in Vedic literature. The Puranas and Upanishads contain a section dedicated to the theory of manu and human qualities for each era. The Puranas hold a significant and strategic position in the hierarchy of the Vedas and Hindu Literature. This research aims to analyze the Manu Theory and human qualities of each era as described in Purana and Upanishad literature using qualitative descriptive research methods. The findings of this research reveal that the concept of manu theory and human qualities, as depicted in Purana and Upanishad literature, reflects Hindus' pride and increasing belief in the teachings of Hinduism as a suitable guide for navigating life in this world and the natural environment.

The Philosophy of Probability Values Behaviour, through Fractions and Composite Probability Function in the Continuous Case

This paper deals with probability theory, and it is an extension to a published paper that has the same title, but for the discrete case. This present paper is aiming to study probability values behavior, in the case of continuous sample space, through fractions intervals and composite function. This aim tends to study the value behavior rather than finding the value itself. Also, this aim requires usage of some concepts of continuity, geometric probability, and measure theory, which also need a brief treatment. This paper is mainly using an experiment with a design that helps to study the probability fractions values in the form of intervals in the case of one direction movement and in the case of different directions. As a result, every case reflects some aspects of probability values behavior and can clarify many important characteristics of the probability theory. In addition to applying the composite function by some important theorems of conditional probability. These are besides a proven proposition that helps to design experiment, upon the understanding of the case nature. In addition to a corollary that allows to visualize negative probability values, as a particular case (trial), that upon the validity of the explanation of negativity which should be consistent with the probability axioms.

M-polar Q-hesitant Anti-fuzzy Set in BCK/BCI-algebras

The main objective of this paper is to effectively define a new concept of the fabulous fuzzy set theory that is called m-polar Q-hesitant anti-fuzzy set and apply it to the BCK/BCI-algebras. The m-polar Q-hesitant anti-fuzzy set is an astonishing development of the combination between the m-polar fuzzy set and the Q-hesitant fuzzy set. However, we introduce knowledge of the m-polar Q-hesitant anti-fuzzy subalgebra, m-polar Q-hesitant anti-fuzzy ideal, closed m-polar Q-hesitant anti-fuzzy ideal, m-polar Q hesitant anti-fuzzy commutative ideal, m-polar Q-hesitant anti-fuzzy implicative ideal, and m-polar Q-hesitant anti-fuzzy positive implicative of BCK/BCI- algebras. In addition, we investigate several theorems, examples, and properties of these notions.

Business management technologies in the management system

The study considered approaches to defining "management system" and "management technology," characterized their classification, and established the relationship between them. It was determined that the main elements of management are systems, processes, management decisions, and labor resources, and the organizational management system is one of the main concepts of organizational theory and is closely related to goals, functions, management processes, and the work of managers. It is proven that the entire management process takes place within the framework of this system, in which managers of all levels, categories, and fields of knowledge participate. It was determined that the basis of the management system is technology, which is precisely the tool by which the transformation process of systems takes place. Technologies, through the subject of management, influence the object. It is proven that management technologies have a clearly defined goal of ensuring the transformation of the management object from the initial state to a new target competitive state or quality or to ensure its guaranteed effective functioning. The improvement of the social development system of the team, which leads to an increase in the social activity of the staff, an increase in the efficiency of the enterprise, and an increase in the material well-being of the staff, is considered. It has been studied that the most common method in our country is the thematic and sectoral grouping of technologies according to the relevant sections of management, management functions, and the main perspectives of management. Given the global tendency of the role of human resources to prevail over factors of a material and technical nature and the problems of the social sphere of management, the use of grading and sociometric technologies is proposed as the most effective among those considered to solve the problems existing at domestic enterprises. Keywords: management technology, management system, sociometry, grading, enterprise management.

METHODOLOGICAL ANALYSIS OF EVOLUTIONISM AND CREATIONISM

In modern natural science, a significant place is given to the concept of global evolutionism and evolutionary theory in biology (in particular). It is considered fundamental and undeniable. Evolutionism was replaced by early worldview ideas about the immutability of the world, which are usually denoted by the term creationism (creation). In scientific and popular literature, evolutionism is presented as something fundamentally new in understanding the picture of the world. Is the difference between the "created world" and the "self-creating world" (evolutionary darwinism) so fundamental? In the work, an attempt is made, if not to refute the fundamental opposition of evolutionism and creationism, then at least to illustrate the hidden methodological connection between them.

Stakeholder perspectives on mosque management and accountability: A stakeholder theory approach

This study focuses on stakeholder assessments of mosque management. The researchers identified and investigated stakeholders' perceptions of mosque management using a descriptive qualitative case study of a historical mosque in the Sleman Regency. The concepts of stakeholder theory and accountability were used as part of the analytical framework. The results show that stakeholders view the religious programs and activities of the mosque positively, feeling that they benefit both the mosque and the surrounding community. Stakeholders also feel that the programs reflect the mosque’s commitment to building trust and stakeholder confidence. In terms of accountability, the mosque emphasizes moral, ethical, and spiritual accountability towards God and relationships with God and humans. Financial reporting is transparent, with reports posted publicly each month. Stakeholders believe that the chief administrator carries out his/her responsibilities honestly, openly, and responsibly. Overall, the research demonstrates the importance of considering stakeholder interests and aspirations to improve mosque management performance related to quality of services, transparency, accountability, and contributing to community development.

The development of RBL-stem learning materials to improve students’ combinatorial thinking skills in solving b-coloring problems for companion farming

Research Based Learning can be packaged with STEM approach. In a RBL, students will find a problem that requires a solution, problem solving skills are very important in learning. One of these mathematical thinking skills is combinatorial thinking skills. b-coloring is one of the concepts of graph theory. b-Coloring is widely applied in various fields, one of which we can apply to companion farming precision agriculture The development of RBL-STEM learning tools to improve students' combinatorial thinking skills in this research meet the criteria of valid, practical, and effective. The validity scores was 3.87. The observation results of learning implementation were 3.83 with a percentage of 95.75%, and student responses were 96.5% positive so that they met practical criteria. Based on the test results, researchers found that 97.5% of students were complete so that they met the effective criteria. Quantitative analysis involves processing pretest and posttest data, where normality test and paired sample t-test are conducted. Based on the normality test, it can be concluded that the pretest and posttest scores have a normal distribution, because the p-value is greater than 0.05, namely 0.053 and 0.059. Furthermore, a paired sample t-test was conducted which showed a p-value of 0.000. These results show that there is a significant increase in students' combinatorial thinking skills after participating in the learning.