bluuebunny/crossref_metadata_2025 huggingface dataset:
Care Team Perspectives and Acceptance of Telehealth in Scaling a Home-Based Primary Care Program: Qualitative Study
Authors: Kozikowski Andrzej , Shotwell Jillian , Wool Eve , Slaboda Jill C , Abrashkin Karen A , Rhodes Karin , Smith Kristofer L , Pekmezaris Renee , Norman Gregory J
Published: April 2019

Background

Novel and sustainable approaches to optimizing home-based primary care (HBPC) programs are needed to meet the medical needs of a growing number of homebound older adults in the United States. Telehealth may be a viable option for scaling HBPC programs.

Objective

The purpose of this qualitative study was to gain insight into the perspectives of HBPC staff regarding adopting telehealth technology to increase the reach of HBPC to more homebound patients.

Methods

We collected qualitative data from HBPC staff (ie, physicians, registered nurses, nurse practitioners, care managers, social workers, and medical coordinators) at a practice in the New York metropolitan area through 16 semistructured interviews and three focus groups. Data were analyzed thematically using the template analysis approach with Self-Determination Theory concepts (ie, relatedness, competence, and autonomy) as an analytical lens.

Results

Four broad themes—pros and cons of scaling, technology impact on staff autonomy, technology impact on competence in providing care, and technology impact on the patient-caregiver-provider relationship—and multiple second-level themes emerged from the analysis. Staff acknowledged the need to scale the program without diminishing effective patient-centered care. Participants perceived alerts generated from patients and caregivers using telehealth as potentially increasing burden and necessitating a rapid response from an already busy staff while increasing ambiguity. However, they also noted that telehealth could increase efficiency and enable more informed care provision. Telehealth could enhance the patient-provider relationship by enabling caregivers to be an integral part of the patient’s care team. Staff members raised the concern that patients or caregivers might unnecessarily overutilize the technology, and that some home visits are more appropriate in person rather than via telehealth.

Conclusions

These findings suggest the importance of considering the perspectives of medical professionals regarding telehealth adoption. A proactive approach exploring the benefits and concerns professionals perceive in the adoption of health technology within the HBPC program will hopefully facilitate the optimal integration of telehealth innovations.
Hoja de cálculo como recurso interactivo para el aprendizaje de la Física
Authors: Mendoza Román José Manuel , Alvarado Lemus José Alberto , Gómez Santos Saúl Alejandro
Published: April 2019

En este escrito se concreta el aprendizaje de la Física en entornos virtuales de aprendizaje y como las simulaciones pueden facilitar la comprensión de fenómenos físicos por los alumnos; además, se aborda la hoja de cálculo como recurso didáctico desde su historia hasta los recursos utilizados en diversas asignaturas. También se asumirán las fases del diseño de la hoja de cálculo (simulador de vectores) que se utilizó como recurso didáctico. Por último, será analizada la mediación de las actividades en el aprendizaje de las magnitudes vectoriales.
Reseña del libro: La enseñanza en la era digital
Authors: Pastor Angulo Martín
Published: April 2019

Tony (AW) Bates es un autor de origen canadiense con una experiencia amplia y trayectoria internacional como experto consultor en el campo de la educación a distancia y tecnologías en educación. Este es su libro más reciente, editado en formato digital bajo licencia Creative Commons no comercial, disponible de manera abierta para todos los interesados en la dirección indicada dentro de la referencia al texto.Este libro, dirigido en particular a los docentes universitarios (aunque también muchas páginas pueden ser aprovechadas por educadores del nivel básico), se compone de 12 capítulos, cuatro apéndices y un espacio final para retroalimentación y actividades, dispuesto por el autor para interacción con sus lectores, además de una sección bibliográfica e índice analítico. Este último, todavía en construcción, según afirma el mismo Tony Bates.
Editorial
Authors: Ramírez Juárez Oliverio
Published: April 2019

En el editorial del número 19 de la RMBD el maestro Oliverio Ramírez Juárez, de la Universidad Virtual del Estado de Guanajuato (UVEG), aborda los contenidos sobre los recursos con la temática propia de esta edición para utilidad de los asesores, tutores, diseñadores, desarrolladores, gestores, directivos, investigadores y estudiantes que participan de las actividades de la educación en línea del nivel medio superior.
Competencias del siglo XXI en proyectos co-tecnocreativos
Authors: Sanabria Zepeda Jorge Carlos , Romero Margarida
Published: April 2019

Los cambios acelerados del contexto físico-digital, demandan de ciudadanos con competencias que garanticen su productividad en una arena competida y sofisticada. Generar conciencia en los educadores sobre algunas de estas competencias es el primer paso para una adecuada transición a lo largo del siglo XXI. Se presentan ejemplos de los crecientes proyectos co-tecnocreativos, la metodología #InmersiónGradual para apoyar su implementación, y la herramienta #5c21 para la evaluación de competencias del siglo XXI.
Economía visual en el diseño educativo en entornos virtuales de enseñanza y aprendizaje
Authors: García Trigos Rafael Oliver , Cavazos Salazar Rosario Lucero , Habib Mireles Lizbeth
Published: April 2019

El uso de las Tecnologías de la Información y la Comunicación (TIC) en entornos virtuales de enseñanza y aprendizaje resulta de suma importancia, ya que las tecnologías sensoriales y multidimensionales ofrecen la oportunidad de mejorar la experiencia del estudiante, al aportar sonidos, imágenes y textos. 

Este trabajo presenta el sustento de la economía visual, mediante la selección de los componentes como: los elementos gráficos o los colores, entre otros, los cuales intervienen en el diseño de material para entornos virtuales. Dado lo anterior, la importancia de la economía visual en la búsqueda de un aprendizaje significativo, cada vez tiene mayor impacto. En este trabajo, se presentan dos casos donde puede observarse dicho impacto en economía visual en el diseño de material didáctico y de difusión institucional. Asimismo, se explica cómo esto favorece la enseñanza aprendizaje en entornos virtuales, haciendo énfasis en la pertinencia del diseño gráfico y la labor del diseñador en la búsqueda de la generación de material que permita la comunicación eficaz en entornos virtuales.
Formación-evaluación-actualización docente, triada inseparable para mejorar la calidad del acompañamiento de los estudiantes del bachillerato virtual de la Universidad Autónoma de Sinaloa
Authors: Sánchez Santos Mireya Guadalupe , Torres Domínguez Araceli
Published: April 2019

Sin lugar a dudas, uno de los factores que tienen mayor peso en el aprendizaje de los estudiantes lo constituye la calidad de las prácticas de enseñanza. 

Desde el surgimiento del Bachillerato Virtual de la Universidad Autónoma de Sinaloa (UAS), se ha vivido un proceso de formación docente para habilitar a los profesores en la modalidad; asimismo, se ha estado en constante evaluación de la práctica docente. 

En el presente texto se aborda la experiencia del Bachillerato virtual de la UAS con respecto a la evaluación docente, los avances logrados y las tareas pendientes por llevar a cabo.
Herramienta Web 2.0 para el acompañamiento tutorial colaborativo académico-administrativo de la educación en línea del nivel medio superior
Authors: Ramos García Anny Frid
Published: April 2019

Un programa de acompañamiento tutorial en el proceso de aprendizaje resulta efectivo, pertinente y relevante en congruencia con los recursos humanos y tecnológicos empleados para su aplicación, de ahí la importancia de aprovechar herramientas Web 2.0 como son formularios y hojas de cálculo Google-Drive para el diseño de instrumentos que permitan dar seguimiento puntual al desempeño académico de los estudiantes de bachillerato en la modalidad a distancia. Por consiguiente, se requiere de la participación experta, valiosa y comprometida de los profesionistas académicos (facilitadores) y personal administrativo según los lineamientos de la enseñanza on line en aras de elevar la calidad del aprendizaje con participaciones colaborativas de tipo multidisciplinar
Observaciones sobre la relación entre economistas y políticos
Authors: Sánchez-Fung José R.
Published: April 2019

No precisa de un resumen
Falsabilidad en la Economía Dominicana
Authors: Vásquez Harold
Published: April 2019

No precisa de resumen
PROPOSTA METODOLÓGICA PARA O DESENVOLVIMENTO DE HABILIDADES EM RESOLUÇÃO DE PROBLEMAS POR MEIO DO ENSINO DE QUIMIOMETRIA
Authors: Guerra Raíza Rosa G. , Ribeiro Juliano Souza , Comarú Michele Waltz
Published: April 2019

Num mundo onde cada vez mais somos bombardeados com muitas informações, a capacidade de lidar com múltiplos dados, aprender a selecioná-los e a utilizá-los de maneira adequada, por vezes é tão ou mais importante do que o conhecimento de como gerar esses dados. É assim também com os instrumentos de análise química, que geram grande quantidade de dados. A quimiometria representa ferramenta importante para interpretação de dados. Todavia, a disciplina Quimiometria não está efetivada no currículo de cursos superiores de química. Este trabalho visou investigar a contribuição que os conhecimentos de quimiometria trazem para alunos de graduação em química na resolução de problemas. Dois grupos de alunos resolveram uma atividade-problema que exigia lógica e visão multivariada para interpretação de dados. Um grupo formado por alunos com conhecimento de quimiometria, apresentou habilidades específicas facilitadoras, capacidade de seleção e escolhas, mas ambos os grupos conseguiram negociar argumentos e trabalhar em grupo. Dessa forma conclui-se que a quimiometria funciona como ferramenta importante para se ter melhor dimensão de análise geral de dados em situações em que esses sejam numerosos e confusos. Também se defende que o uso das metodologias ativas promove mais autonomia para os futuros professores. Acredita-se que esse conhecimento pode contribuir na formação dos estudantes de licenciatura em química.
VISIBILIDADE E DIREITO: ESBOÇO DE UM PROBLEMA
Authors: Rabenhorst Eduardo Ramalho
Published: April 2019

O propósito deste artigo é apresentar um esboço de investigação sobre a relação entre cultura visual (visual culture) e direito. Ainda que incipientes, os estudos sobre o tema estimulam uma reflexão teórica sobre o reconhecimento social e jurídico de grupos minoritários ou vulneráveis, e oferecem novos pontos de vista sobre os temas da segurança e da representação política em uma era marcada pelo predomínio da visibilidade.
(DIS)PARIDADES DE GÊNERO AO NÍVEL DAS SENTENÇAS JUDICIAIS: UMA REVISÃO ESTRUTURADA DA LITERATURA
Authors: Paula Catarina Sofia Pereira , Caridade Sónia Maria Martins
Published: April 2019

Com esta revisão estruturada da literatura pretendeu-se analisar as disparidades nas sentenças judiciais que envolvem mulheres agressoras. Foi efetuada uma pesquisa em diversas bases de dados eletrónicas, acedendo-se a um total de 30 artigos. A análise destes diferentes estudos permitiu perceber que ainda são escassos os trabalhos de investigação nesta área. Entre os diferentes fatores com potencial influência no resultado das sentenças judiciais, identificaram-se: idade, existência de filhos, raça, tipo de crime praticado, escolaridade e antecedentes criminais. Concluiu-se pela necessidade de haver transformações nas práticas sociais e jurídicas, promovendo a eficácia normativa e a credibilização do sistema judicial.
Javanese-Christian Church Belief and Inter-religious Dialogue
Authors: Fauzi Maria Ulfa
Published: April 2019

This study attempts to elucidate both of Muslim and Christian understandings toward the idea of religious pluralism, with the case study of Javanese-Christian Church of Pogung and its relation to the surrounding community. It provides the discussion with some theological analyses on how people conceive the meaning of truth and, how this has led to the possibility and necessity of a dialogue; more specifically how their religious doctrines maintain their communities in dealing with other communities. Based on the qualitative approach, wherein the data gathered through in-depth interview and observation, the result of this study revealed that dialogue must be based on personal religious experiences and firm truth claims. Without personal religious experience, there is no way of grasping what the dialogue is all about. Dialogue must be based on the recognition of the possible truth in all religions; the ability to recognize this truth must be grounded in the hypothesis of common ground and goal for all religions. Dialogue must be based on openness to the possibility of genuine change or conversion.Keywords: Religious doctrine, Religious pluralism, DialogueÂ
ÙƒÙŠÙ Ù†ÙÙ‡Ù… Ø§Ù„Ø¯ÙŠÙ†ØŸ
Authors: Mohammed Dheen
Published: April 2019

This paper attempts to present the concept of religion as articulated by Muslim scholars contributing thus to the ongoing current debate on understanding religion. The need for the paper arises from the factual position that western perceptions about approaches to religion have inundated the Muslim world (and the world at large) to the extent that the intellectual endeavors of many Muslim academics are largely shaped by these perceptions while the Muslim contribution in this regards is minimal if not significantly absent from the scene. This paper endeavors to situate the Muslim perception of understanding other religions within the context of the general framework.Â Keywords:Religion, Concept of Religion, Approaches to Religion
A pilot study on improve the functioning of extensive green roofs in city centers using mosses
Authors: Burszta-Adamiak Ewa , Fudali Ewa , Kolasińska Karolina , Łomotowski Janusz
Published: April 2019

Most of environmental benefits of green roofs results from the presence of a vegetation layer. However vascular plants quickly die in harsh urban conditions. This paper presents research involving moss species appearing spontaneously on green roofs in cities to test whether we can create a vegetation layer with simplifi ed structure introducing that moss. It was checked using two transplant methods and three models of such roofs. Research evidenced that moss Ceratodon purpureus Hedw. is able to survive on green roofs in cities with high efficiency and can develop after transplant on roofs with a simple structure. Maximum weight of the moss layer during the year did not exceed 7.0 kg·m–2.
Groundwater assessment at east side of Mosul City during 2014–2017
Authors: Al-Abedeen Al-Ozeer Ali , Fakhraldeen Ahmed Mohammed
Published: April 2019

This study assesses groundwater quality GWQ at the east side of Mosul city for different purposes during 2014–2017. Eighteen shallow wells distributed in residential areas are selected and assessed by analyzing their physical, chemical and biological properties. This study reviews the textures of sub-layers by using groundwater modelling system (GMS) to show the probability of infiltration of nearby wastewater and gray water. This study analyzes epidemiological data about diarrhea cases that were increased during that period and calculating the relative, attributed and odd risk. There are three types of assessment are conducted including ranking assessment, weighted assessment and geographical information systems (GIS) assessment. A final map is created to show the most suitable area for live stock and irrigation purposes. The results show that the studied groundwater samples are unsuitable for drinking. High damage can happen for crops with sensitivity for salinity. Most wells are acceptable for live stock purpose.
Zredukowane współrzędne obrysu strumienia na trapezowym progu przepuszczalnym z przelewem o ostrej krawędzi na skarpie górnej
Authors: Bajkowski Sławomir , Piątek Sebastian , Tymińska Aneta
Published: April 2019

The purpose of the work was to develop a typical shape of water surface profi le above trapezoidal gabion sill with the sharpcrested weir on the upstream slope. Reduced co-ordinates of the water surface profile above trapezoidal gabion sill with a sharp-crested weir on the upstream slope were developed. The ordinate points of the contour were reduced in relation to the height of the upstream water level above the sharp-crested weir. The cut off points of the contour were reduced according to the length of the zone influencing the stream to the inside of the stone sill. In the analyzes, the results of laboratory tests were used, according to which the shape of the free surface profile reduced coordinates was developed. The analyzed sill consisted of the permeable part filled natural aggregates and the solid part in the form of an inclined sharp-crested weir. The sill had a symetrical trapezoidal shape with the slopes of 1 : 1. The shape of the stream flowing over the analyzed sill depends on the head of the upstream water level above the crest of the slope weir. As a result of the conducted analyzes, a uniform stream shape was obtained for both the free and wave flow of the disturbance zone. The profiles obtained have strong correlation dependence. The obtained results can be taken into account during design similar hydraulic structures.
Evaluation of bioactivities and phenolic composition of extracts of Salvia officinalis L. (Lamiaceae) collected in Montenegro
Authors: Duletic-Lausevic Sonja , Alimpic-Aradski Ana , Zivkovic Jelena , Gligorijevic Nevenka , Savikin Katarina , Radulovic Sinisa , Cocic Danijela , Marin Petar
Published: April 2019

Sage (Salvia officinalis) is the best-known species of the genus Salvia, due
to its medicinal and flavouring properties. This research was conducted on
samples of S. officinalis collected from Potoci (SOP) in the continental
part of Montenegro and from Valdanos (SOV) and Lustica (SOL) in the
country?s coastal region. Extracts prepared using 96% ethanol, 50% ethanol
and hot distilled water were examined for phenolic composition, as well as
for their antioxidant, enzyme-inhibiting and cytotoxic activities. The
HPLC-DAD method was employed for quantitative-qualitative analysis of
phenolic compounds in extracts, which confirmed the presence of rosmarinic
and caffeic acids and luteolin-7-O-glucoside. Total phenolic and flavonoid
contents, antioxidant activity, and inhibition of acetylcholinesterase and
tyrosinase were measured spectrophotometrically. In the applied antioxidant
tests (DPPH, FRAP and ?-carotene/linoleic acid tests) and tests of
inhibition of the enzymes acetylcholinesterase and tyrosinase, the SOP
extracts showed stronger antioxidant and enzyme-inhibiting activities
compared to SOV and SOL, while the most efficient solvent was 50% ethanol.
The highest cytotoxic activity in the MTT test was recorded for 96% ethanol
extracts, especially in the case of the SOL sample, against the A375 cell
line. All of the tested bioactivities were more strongly correlated with
total phenolic content than with flavonoid content. Differences in the
tested bioactivities of extracts obtained from plants collected at
ecologically different localities and with different extraction solvents
could be explained by variations in total phenolic and flavonoid contents.
Rediscovery of Chara canescens Loiseleur in Serbia
Authors: Trbojevic Ivana , Subakov-Simic Gordana , Blazencic Jelena , Predojevic Dragana
Published: April 2019

Chara canescens is the only charophyte performing parthenogenetic
reproduction. Although most recently found populations consist solely of
parthenogenetically reproducing females, bisexual populations exist as well,
making the species a unique example of the sympatric occurrence of both
reproductive modes. In Serbia, C. canescens was found only once for certain,
near Prokuplje in 2005. The purpose of the present study is to report a
reliable new finding of C. canescens in Serbia, in a stable parthenogenetic
female population. Sampling was conducted on 7 July 2018 from the Plava
Banja pond near the city of Kikinda. Results of water analyses revealed high
concentrations of almost all measured parameters, but especially high levels
of salinity and alkalinity markers. Very high concentrations of sulphates
and chlorides in the Plava Banja pond pointed to extreme ion anomalies. On
the basis of the concentration of nutrients in it, the Plava Banja pond can
be characterised as a eutrophic water body. Chara specimens collected from
this pond were identified as C. canescens, and only females in the
reproductive phase were detected. The environmental features of this habitat
are typical in relation to preferences of the given species for light and
salinity (ion concentration). This record is of great importance because C.
canescens has been declared to be probably extinct in the wild in Serbia.
Solvability of a system of integral equations of Volterra type in the Fréchet space lp loc(R+) via measure of noncompactness
Authors: Banaei Shahram
Published: April 2019

The purpose of this article is to analyze the existence of solutions for a
system of integral equations of Volterra type in the Fr?chet space Lp
loc(R+) and prove a fixed point theorem of Darbo-type in this space. The
technique of measure of noncompactness by applying fixed point theorem is
the main tool in carrying out our proof. Moreover, we present an example to
show the efficiency of our results.
Majorization problems for certain classes of multivalent analytic functions related with the Srivastava-Khairnar-More operator and exponential function
Authors: Tang Huo , Deng Guantie
Published: April 2019

In the present paper, weinvestigate several majorizaton problems for certain
Classes M?,? ?,p(a,b,c,?) and N?,? ?,p(a,b,c,?) of multivalent analytic
functions related to exponential function, which are defined through the
Srivastava-Khairnar-More operator I?,? ?,p(a,b,c) given by (1.4).
Meanwhile, some special cases of our main results in form of corollaries are
given.
An extension of the schwarz inequality in inner product spaces
Authors: Ye Yun
Published: April 2019

We extend the improved Schwarz inequality of Dragomir [1, Theorem 2] to any
power p ? 2, ||x||p||y||p-|?x,y?|p ? |det [|?x,e?| |?y,e?|(||y||p - |?x,e?|p)1/p (||y||p- |?y,e?|p)1/p]|p for any vectors x, y, e ? Cn with ||e|| = 1. Applications to n-tuples of complex
numbers are also included.
Quasihyperbolic quasi-isometry and Schwarz lemma of planar flat harmonic mappings
Authors: Shi Qingtian , Qi Yi
Published: April 2019

A sufficient condition of a flat harmonic quasiconformal mapping to be a
quasihyperbolic quasiisometry on any subdomain of C is given in this paper,
which generalizes the corresponding results of Euclidean and 1/|?|2 harmonic
mappings. As an application, Schwarz lemma of flat harmonic mapping is also
investigated. Besides, properties and constructions of flat harmonic mapping
are obtained at the same time.
Selection principles in function spaces with the compact-open topology
Authors: Osipov Alexander
Published: April 2019

For a Tychonoff space X, we denote by Ck(X) the space of all real-valued
continuous functions on X with the compact-open topology. A subset A ? X is
said to be sequentially dense in X if every point of X is the limit of a
convergent sequence in A. In this paper, the following properties for Ck(X)
are considered. S1(S,S)=> Sfin(S,S) => Sfin(S,D) <=S1(S,D) S1(D,S)
=> Sfin(D,S) => Sfin(D,D) <= S1(D,D) For example, a space Ck(X) satisfies
S1(S,D) (resp., Sfin(S,D)) if whenever (Sn : n ? N) is a sequence of
sequentially dense subsets of Ck(X), one can take points fn ? Sn (resp.,
finite Fn ? Sn) such that {fn : n ? N} (resp.,U {Fn : n ? Ng) is dense in
Ck(X). Other properties are defined similarly. In [22], we obtained
characterizations these selection properties for Cp(X). In this paper, we
give characterizations for Ck(X).
Asymptotically deferred f-statistical equivalence of sequences
Authors: Konca Şukran
Published: April 2019

In this work, we obtain a generalization of asymptotically deferred
statistical equivalence of non-negative real-valued sequences with the aid
of a modulus function. Further, we examine some of main properties of
asymptotically deferred f-statistical equivalence and obtain some
equivalence results and inclusion relations.
A new approach for soft semi-topological groups based on soft element
Authors: Polat Çakmak , Yaylalı Gözde , Tanay Bekir
Published: April 2019

Molodtsov introduced a theory of soft sets which can be seen as an effective
tool to deal with uncertainties in [16] and then, the development of the
theory gradually increased. In this paper we define the notion of soft
semi-topological groups based on the notion of soft element which is defined
by Wardovski in [28]. Also some theoretical results are given. Thus soft
topological group theory become open to improvement with these new
definitions and results.
The quaternionic expression of ruled surfaces
Authors: Şenyurt Süleyman , Çalışkan Abdussamet
Published: April 2019

In this paper, firstly, the ruled surface is expressed as a spatial
quaternionic. Also, the spatial quaternionic definitions of the Striction
curve, the distribution parameter, angle of pitch and the pitch are given.
Finally, integral invariants of the closed spatial quaternionic ruled
surfaces drawn by the motion of the Frenet vectors {t,n1,n2} belonging to
the spatial quaternionic curve ? are calculated.
Investigation of s-convex functions by using convex combinations
Authors: Gürbüz Mustafa
Published: April 2019

This work is inspired by the paper [7], where the authors consider m-convex
functions. The main aim of this paper is to establish some inequalities for
s-convex functions without using their derivatives. Also we obtain some new
results in discrete form.
Relationships between some distance-based topological indices
Authors: Hua Hongbo , Gutman Ivan , Wang Hongzhuan , Das Kinkar
Published: April 2019

The Harary index (HI), the average distance (AD), the Wiener polarity index
(WPI) and the connective eccentricity index (CEI) are distance-based graph
invariants, some of which found applications in chemistry. We investigate
the relationship between HI, AD, and CEI, and between WPI, AD, and CEI.
First, we prove that HI > AD for any connected graph and that HI > CEI for
trees, with only three exceptions. We compare WPI with CEI for trees, and
give a classification of trees for which CEI ? WPI or CEI < WPI.
Furthermore, we prove that for trees, WPI > AD, with only three exceptions.
NEC rings
Authors: Pan Yong , Li Decai , Wei Junchao
Published: April 2019

A ring R is called NEC if for any a, b ? N(R), ab = ba. The class of NEC
rings is a proper generalization of the class of CN rings. First, with the
aid of NEC rings, some characterizations of CN rings and reduced rings are
given. Next we extend many properties of CN rings to NEC rings such as we
show that NEC rings are directly finite and left min-abel; NEC regular ring
are strongly regular; a ring R is NEC if and only if every Pierce stalk of
R is NEC; Also we discuss some properties of NEC exchange rings; Finally, we
give some properities of MP-invertible elements.
Leaping Cauchy numbers
Authors: Komatsu Takao
Published: April 2019

We introduce leaping Cauchy numbers, that are generalizations of the
analogous numbers to Euler numbers, as Cauchy numbers corresponds to
Bernoulli numbers, in particular, in terms of determinant expressions. We
also give several properties including sums of products.
The global behavior of a quadratic difference equation
Authors: Hadziabdic Vahidin , Mehuljic Midhat , Bektesevic Jasmin , Mujic Naida
Published: April 2019

In this paper we will present the Julia set and the global behavior of a
quadratic second order difference equation of type xn+1 = axnxn-1 + ax2n-1
+ bxn-1 where a > 0 and 0 ? b < 1 with non-negative initial conditions.
Classes of analytic functions related to Blaschke products
Authors: Lecko Adam , Śmiarowska Barbara
Published: April 2019

Basing on the well known Riesz Theorem on the canonical factorization of
bounded analytic functions, we distinguished the subfamilies of the
Carath?odory class of functions. The basic properties of introduced classes
have been proved. Related classes of analytic functions are discussed also.
Dynamical behavior of a stochastic ratio-dependent predator-prey system with Holling type IV functional response
Authors: Fu Jing , Jiang Daqing , Shi Ningzhong , Hayat Tasawar , Abmad Baslur
Published: April 2019

In this paper, we investigate the dynamical properties of a stochastic
ratio-dependent predatorprey system with Holling type IV functional
response. The existence of the globally positive solutions to the system
with positive initial value is shown employing comparison theorem of
stochastic equation and It??s formula. We derived some sufficient
conditions for the persistence in mean and extinction. This system has a
stable stationary distribution which is ergodic. Numerical simulations are
carried out for further support of present research.
Properweak regular splitting and its application to convergence of alternating iterations
Authors: Mishra Debasisha
Published: April 2019

Theory of matrix splittings is a useful tool for finding the solution of a
rectangular linear system of equations, iteratively. The purpose of this
paper is two-fold. Firstly, we revisit the theory of weak regular splittings
for rectangular matrices. Secondly, we propose an alternating iterative
method for solving rectangular linear systems by using the Moore-Penrose
inverse and discuss its convergence theory, by extending the work of Benzi
and Szyld [Numererische Mathematik 76 (1997) 309-321; MR1452511].
Furthermore, a comparison result is obtained which ensures the faster
convergence rate of the proposed alternating iterative scheme.
The extremal ranks and inertias of matrix expressions with respect to generalized reflexive and anti-reflexive matrices with applications
Authors: Liu Xifu
Published: April 2019

The extremal ranks of matrix expressions of A-BXC and D-EYE*, and the
extremal inertias of D-EYE* are discussed, where X and Y are reflexive
(or anti-reflexive) and Hermitian reflexive (or anti-reflexive) matrices
respectively. For the applications, we derive the extremal ranks of the
reflexive and anti-reflexive solutions to AX = B. In addition, we also
establish some conditions for the existence of common reflexive and
anti-reflexive solutions to AX = B and CXD = E, and conditions for the
solvability of some matrix equations and matrix inequalities.
A nonmonotone line search method for stochastic optimization problems
Authors: Krejic Natasa , Loncar Sanja
Published: April 2019

A nonmonotone line search method for solving unconstrained optimization
problems with the objective function in the form of mathematical expectation
is proposed and analyzed. The method works with approximate values of the
objective function obtained with increasing sample sizes and improves
accuracy gradually. Nonmonotone rule significantly enlarges the set of
admissible search directions and prevents unnecessarily small steps at the
beginning of the iterative procedure. The convergence is shown for any
search direction that approaches the negative gradient in the limit. The
convergence results are obtained in the sense of zero upper density. Initial
numerical results confirm theoretical results and show efficiency of the
proposed approach.
Perturbation bounds for the metric projection of a point onto a linear manifold in reflexive strictly convex Banach spaces
Authors: Cao Jianbing , Jiao Hongwei
Published: April 2019

In this paper, by using some recent perturbation bounds for the Moore-Penrose
metric generalized inverse, we present some results on the perturbation
analysis for projecting a point onto a linear manifold in reflexive strictly
convex Banach spaces. The main results have two parts, part one covers
consistent operator equations and part two covers the general so-called ill
posed operator equations.
Combinatorial identities and sums for special numbers and polynomials
Authors: Simsek Yilmaz
Published: April 2019

In this paper, by using some families of special numbers and polynomials with
their generating functions and functional equations, we derive many new
identities and relations related to these numbers and polynomials. These
results are associated with well-known numbers and polynomials such as Euler
numbers, Stirling numbers of the second kind, central factorial numbers and
array polynomials. Furthermore, by using higher-order partial differential
equations, we derive some combinatorial sums and identities. Finally, we
give two computation algorithms for Euler numbers and central factorial
numbers.
Error estimations of Turán formulas with Gori-Micchelli and generalized Chebyshev weight functions
Authors: Mihic Ljubica , Pejcev Aleksandar , Spalevic Miodrag
Published: April 2019

S. Li in [Studia Sci. Math. Hungar. 29 (1994) 71-83] proposed a Kronrod type
extension to the well-known Tur?n formula. He showed that such an extension
exists for any weight function. For the classical Chebyshev weight function
of the first kind, Li found the Kronrod extension of Tur?n formula that has
all its nodes real and belonging to the interval of integration, [-1,1].
In this paper we show the existence and the uniqueness of the additional two
cases - the Kronrod exstensions of corresponding Gauss-Tur?n quadrature
formulas for special case of Gori-Micchelli weight function and for
generalized Chebyshev weight function of the second kind, that have all
their nodes real and belonging to the integration interval [-1,1].
Numerical results for the weight coefficients in these cases are presented,
while the analytic formulas of the nodes are known.
An integrated model of work engagement: How the satisfaction of basic psychological needs explains the relationship between personality and work engagement
Authors: Prokesova Lenka , Vaculik Martin , Kasparkova Ludmila , Prochazka Jakub
Published: April 2019

This paper aims to broaden the understanding of work engagement antecedents. It focuses on impact of personality characteristics ? positive affectivity, proactive personality, and conscientiousness on work engagement, and examines whether personality influence can be explained by self-determination theory, i.e., the satisfaction of needs for competence, autonomy, and relatedness. An online questionnaire on a sample of 783 Czech workers provided our data. Structured equation modelling showed the influence of positive affectivity and conscientiousness on engagement can be partly explained by the satisfaction of the need for competence. The relationship between proactive personality and engagement cannot be explained by the satisfaction of any of the basic psychological needs. More specifically, positive affectivity predicts the satisfaction of all three needs, conscientiousness predicts only the satisfaction of the need for competence, and proactive personality does not predict the satisfaction of any need. Interestingly, engagement is predicted only by the satisfaction of the need for competence.
Micro-level modeling of the detonation wave attenuation by inert particles
Authors: Bedarev Igor
Published: April 2019

A computational technology for direct modeling of the detonation waves
interaction with a set of particles at the micro level has been developed. A
simulation of the detonation waves passage through a system of particles
with their different relative positions was carried out. Stoichiometric
hydrogen air mixture is considered. The combustion process is described
using a reduced kinetic mechanism. Estimates of the ratios between times of
the velocity and thermal relaxation are obtained. Detailed shock-wave
patterns of gas flow in the particles vicinity are obtained. The possibility
of detonation failure at particles volume fractions of close to the
concentrations obtained in modeling at the macro level has been revealed.
Simulation of CH4 recovery from hydrate deposits by injection of CO2
Authors: Belova Svetlana , Chiglintseva Angelina , Khasanov Marat , Dudareva Olga , Shagapov Vladislav
Published: April 2019

The paper presents a mathematical model of CH4 recovery from gas hydrate
deposits via injection of liquid CO2. The process of CH4 recovery is
supposed to occur on the moving frontal boundary separating the deposit
into two domains. The near domain is saturated with liquid CO2 and its
hydrate while the far one is saturated with CH4 and its hydrate.
Self-similar solutions describing the temperature and pressure fields were
obtained. The effect of main parameters on the dynamics of the process
under study was explored. It was revealed that at low temperatures of the
CO2 being injected the temperature in the far domain did not exceed that of
equilibrium for decomposition of CH4 gas hydrate. It was also found that
with increasing pressure at which CO2 was injected into the gas hydrate
do-main, the extension of the region saturated with CO2 hydrate was
increasing.
Simplified mathematical model of the hydrothermal regime of the Krasnoyarsk reservoir
Authors: Belolipetskii Victor , Genova Svetlana
Published: April 2019

The scheme of the reservoir bed is applied to numerical study of the
hydrothermal regime of the Krasnoyarsk Reservoir in the form of regions
with continuous depth variation and abrupt width change. A numerical
algorithm for the research of 2-D stratified currents in vertical plane in
flowing reservoirs is considered taking into account Coriolis force. The
numerical model determines the vertical distributions of water temperature
in various areas of a reservoir real meteodata. There are given examples of
water currents and temperature calculations in the Krasnoyarsk Reservoir.
The results of the calculations are consistent with the observational data.
Studying permeability of nanostructures obtained from polyethylene threads
Authors: Bubenchikov Michael , Bubenchikov Alexey , Malozemov Alexander
Published: April 2019

The paper studies process of interaction of a moving molecule with structure
atoms. The mathematical description is based on application of Hamiltonian
systems model and numerical methods for solving the basic problem of
molecular dynamics. The interaction between individual atoms and the
simplest molecules is cared out using the classical Lennard-Jones potential.
Polyethylene nanostructures are considered as filtering elements for
selective separation of natural gas mixtures, in particular, their light
components: hydrogen and helium. The influence of geometric dimensions and
geometric features of a nanostructure on selectivity of gas mixtures
separation is studied.
Investigating permeability of porous graphene
Authors: Malozemov Alexander
Published: April 2019

A graphene sheet with regular pores similar to the surface form of boron
nitride is simulated be means of crystallographic constructions. The sheet
is represented by the aggregate of carbon atoms in the corresponding
positions of the crystal structure which do not experience thermal
oscillations. Within the framework of the presented approximation,
permeability of porous graphene with respect to natural gas components is
theoretically analysed. Based on the results obtained, selectivity of
separation for methane-helium mixtures is determined.
Investigation of working processes in a flowing channel of ramjet engine
Authors: Maslov Eugene , Faraponov Valery , Arkhipov Vladimir , Zharova Irina , Kozlov Eugene , Savkina Nadezhda
Published: April 2019

The technique and results of experimental-theoretical study of gas-dynamics,
heat transfer and the structure of gas-flow in the flowing channel of a
ramjet engine in Mach number range M = (5-7) are presented. The temperature
distribution along the flowing channel of a ramjet engine was experimentally
obtained. The temperature along the wall of the flowing channel of the
axisymmetric model was measured using the developed thermo-probe.
Distributions of Mach number and temperature along the symmetry axis of the
flowing channel of the model are obtained numerically. Comparison of the
numerical and experimentally obtained values of the Mach number showed their
qualitative agreement.
Multilayer method for solving a problem of metals rupture under creep conditions
Authors: Kuznetsov Evgenii , Leonov Sergey , Tarkhov Dmitry , Vasilyev Alexander
Published: April 2019

The paper deals with a parameter identification problem for creep and
fracture model. The system of ordinary differential equations of kinetic
creep theory is applied for describing this model. As for solving the
parameter identification problem, we proposed to use the technique of neural
network modeling, as well as the multilayer approach. The procedures of
neural network modeling and multilayer approximation constructing
application is demonstrated by the example of finding parameters for
uniaxial tension model for isotropic steel 45 specimens at creep conditions.
The solution corresponding to the obtained parameters agrees well with
theoretical strain-damage characteristics, experimental data, and results
of other authors.
PENGARUH PERBANDINGAN SERBUK KAYU MANIS (Cinnamomum burmannii) DENGAN CENGKEH (Syzygium aromaticum L.) DAN KONSENTRASI GULA STEVIA (Stevia rebaudiana B.) TERHADAP KARAKTERISTIK TEH CELUP DAUN MENGKUDU (Morinda citrifolia L.)
Authors: Nurminabari Ina Siti
Published: April 2019

Teh herbal adalah minuman yang terbuat dari bunga, daun, biji, akar atau buah kering tanpa menggunakan daun teh (Camelia sinensis). Penelitian ini bertujuan untuk mengetahui pengaruh penambahan serbuk kayu manis dengan cengkeh dan konsentrasi gula stevia terhadap karakteristik teh daun mengkudu. Metode penelitian ini menggunakan metode RAK (Rancangan Acak Kelompok) dengan pola faktorial 3 x 3. Metode penelitian ini dibagi dua, yaitu penelitian pendahuluan dan penelitian utama. Berdasarkan hasil penelitian pendahuluan didapatkan aktivitas  antioksidan pada setiap bahan baku yaitu serbuk kayu manis, serbuk cengkeh, daun mengkudu kering dan pucuk daun mengkudu masing-masing sebesar 6,43 ppm, 7,51 ppm, 69,59 ppm, 75,71 ppm dan memiliki kadar air masing-masing sebesar 8 %,11%, 7%, dan 12,72%. Sedangkan pada penelitian utama didapat rata-rata kadar air pada teh daun mengkudu berkisar antara 7,33 % - 9,33 %. Rata-rata kadar karbohidrat berkisar antara 1,28% - 1,70%. Serta aktivitas antioksidan pada seduhan teh daun mengkudu yaitu sebesar 747,132 ppm.
PENGARUH SUBSTITUSI UBI JALAR UNGU (Ipomoea batatas) SERTA PERBANDINGAN KACANG KORO (Canavalia ensiformis) DENGAN SUSU SKIM TERHADAP KARAKTERISTIK ES KRIM
Authors: Widiantara Tantan
Published: April 2019

This research was aimed to determine and to assess the influence of the substitution of purple sweet potato and the comparison between skim milk and jack bean extract to the characteristic of purple sweet potato ice cream. The benefits of this research are to diversifying local food-based products, to increase the value of jack bean and purple sweet potato, and as the reference for the researchers about the process of making purple sweet potato ice cream. This research consist of two stages. The first stage is preliminary research, then followed by the second stage; main research. The experiment was designed using Randomized Block Design (RBD) with (3x3) factorial pattern which is consist of 2 (two) factors. The first factor is the substitution of purple sweet potato (17,5% ; 22,5% ; 27,5%) and the second factor is the comparison between skim milk and jack bean extract (80%:20% ; 70%:30% ; 60%:40%), each combination was replicated three times. The results of the preliminary stages showed that jack bean extract contains HCN levels of 0.04968 mg/kg and protein content of 2.0499%, antioxidant activity of purple sweet potato paste of 178.218 ppm. The results of the main research showed that the substitution of purple sweet potato had an affect on protein content, fat content, overrun, attributes of color, aroma, taste, and texture of the ice cream. The comparison of skim milk and jack bean extract affect the protein content, attributes of color, aroma, taste, and texture of ice cream. The interaction between the two effects on protein content, fat content, attributes of color, taste, and texture of purple sweet potato ice cream. The antioxidant activity of the highest protein sample was 791.403 ppm.
Ivermectin Protects against Monosodium Glutamate-Induced Excitotoxicity in the Rat
Authors: Arise Rotimi O. , Arise Abimbola K. , Oyewole Oluwole I. , Malomo Sylvia O.
Published: April 2019

Monosodium glutamate (MSG), an established excitotoxic food additive, has been found to induce oxidative stress in all tissues. To examine the protective effects of ivermectin on MSG-induced excitotoxicity, 28 male albino rats were randomized into four groups. Group 1, the control, received 1 ml of oral distilled water, group 2 was administered an aqueous solution of MSG (4 mg/kg body weight/day). Group 3 was co-administered with the same dose of MSG and 0.4 mg/kg body weight of ivermectin, while group 4 rats received orally the same dose of MSG for 2 weeks, after which ivermectin was administered orally for 1 week. Administration of MSG orally for 21 days and for 14 days, followed by oral administration of ivermectin for 7 days, significantly increased (p < 0.05) glutathione-S-transferase, nitric oxide synthase, superoxide dismutase and catalase activities as well as malondialdehyde and intracellular Ca2+ concentrations while Na+ - K+ - ATPase, Ca2+ - Mg2+ - ATPase, acid phosphatase (ACP) and alkaline phosphatase (ALP) activities were significantly reduced (p < 0.05) compared to the control. However, co-administration of MSG and ivermectin for 21 days did not show any significant difference (p > 0.05) in all the parameters studied compared to the control. This result suggests that ivermectin may protect against MSG-induced excitotoxicity in rats.
Using Team-Based Learning to Teach Evidence-Based Medicine to First-Year Residents
Authors: Mousavi Mandana Akbarinejad , Amini Mitra , Delavari Somayeh , Seifi Ali
Published: April 2019

Team-based learning (TBL) is a well-established instructional strategy that provides students with the chance to apply conceptual knowledge through a series of actions, including pre-class, individual, team class activity, and immediate feedback. The purpose of the present study was to introduce a course of teaching the evidence-based medicine (EBM) to all first-year medical residents in different disciplines at Shiraz Medical School in Iran country using the TBL instructional strategy.

The sample included 86 medical residents at Shiraz Medical School. This study had a quasi-experimental design and was conducted in 12 sessions of evidence-based medicine (EBM) based on team-based learning (TBL) strategy. The obtained data were analyzed using SPSS software. In all sections, the results of Individual Readiness Assurance Tests (IRATs) and Group Readiness Assurance Tests (GRATs) were added and calculated. Cronbach’s alpha test was implemented to evaluate the reliability of the questionnaires. For the descriptive analysis of data, descriptive statistics were used. ANOVA and T-test were used for analytic analysis.

There was a significant difference in answering the questions between individual (3.73 ± 2.33) and group (4.71 ± 2.29) stages. Residents gained higher average grades on working in the team (P-value < 0.02). Results of residents’ response about satisfaction questionnaire are shown that the best scores belong to group activities in TBL.

The results of this study showed that TBL could be used as an effective method for residents’ education in different disciplines.
Changes in the Characteristic Impedance of Textile Signal Lines While Mechanically Loaded
Authors: Leśnikowski Jacek , Kubiak Paweł
Published: April 2019

The paper presents studies over the changes in the characteristic impedance of selected type of textile signal lines (TSLs) during mechanical loads. The article describes the construction of tested lines, the measurement method, and statistical analysis of the collected results.