bluuebunny/crossref_metadata_2025 huggingface dataset:
Reflexiones sobre patriarcalismo y discapacidad: una mirada desde el ámbito educativo
Authors: García Ríos Diana Patricia
Published: December 2019

Artículo de reflexión que busca incitar la consciencia individual y social sobre los efectos del modelo patriarcal en el sistema educativo, de manera particular en la educación de las personas en situación de discapacidad. Se describen algunas características de la cultura patriarcal y las formas de actuación que ha instaurado en el ámbito educativo, configurándose como mecanismo de control, dominación y exclusión de los sujetos y de la vida misma. El artículo resalta la necesidad de propiciar una educación incluyente pensada desde una ética del cuidado y desde una perspectiva de educar para cuidar la vida; enfoques que invitan a desplegar la subjetividad y la conexión con la vida desde experiencias pedagógicas que vinculen la amorosidad, el cuidado mutuo, la solidaridad y la aceptación de la diferencia como elementos esenciales que deben incorporar los procesos pedagógicos. Se propone avanzar hacia una educación otra donde todos y todas sean aceptados y acogidos sin distinciones y exclusiones.
Literatura, fantasía y realidad
Authors: Román Celso
Published: December 2019

La conferencia se basa en la exposición de los siguientes temas: la palabra como entidad generadora de realidades en nuestra mente, a la vez que es una herramienta creadora de mundos; la metáfora como un recurso literario que identifica dos términos entre los cuales existe alguna semejanza, asumida como instrumento que por comparación permite apropiar ideas del mundo; la palabraen relación con el habla humana, más allá de la simple comunicación de un mensaje, asumida como transformadora de la realidad a lo largo de la historia; el mito de creación como explicación mágica del mundo por todos los pueblos; la leyenda, como un encuentro entre dioses y humanos, ya sea para ayudarles, o para ponerles condiciones; los cuentos de hadas y populares como historias que le suceden, simple y llanamente, a los seres humanos y son el resultado de la confluencia entre Europa y América, a lo largo de varios siglos.
Tendencias de investigaciones sobre prácticas de crianza en Latinoamérica
Authors: Varela Londoño Sandra Patricia , Salguero Reyes Lizeth Paola , Galindo Mendoza Martha Cecilia , Moreno Benavides Ana Maria , Castañeda Orejuela Diana
Published: December 2019

Este artículo recoge y analiza investigaciones relacionadas con prácticas de crianza en Latinoamérica a partir de un estado del arte en el periodo 2002-2019. Se identificaron las principales tendencias actuales y las perspectivas que los estudios sugieren. El método empleado fue de revisión integrativa, cuya finalidad es obtener nuevas conclusiones a partir de resultados de investigaciones ya realizadas. La metodología fue cualitativa desde una perspectiva teórica hermenéutica a partir de estudios aplicados y teóricos que expresan modos de interrelación y tipos de prácticas parentales. Se concluye que los investigadores tienden al uso de combinaciones teóricas para comprender las prácticas de crianza, lo que da cuenta de la importancia de la educación que ofrece la familia o entorno cercano en los primeros años de vida. Se presenta un fenómeno característico: el grado de corresponsabilidad de actores que intervienen en el desarrollo de niños y jóvenes está mediado por un factor cultural.
La educación matemática inclusiva: una experiencia en la formación de estudiantes para profesor
Authors: Castro Cortés Claudia Cecilia , Torres Puentes Elizabeth
Published: December 2019

En este artículo se muestra una experiencia de formación de estudiantes para profesor de matemáticas en y para la diversidad, de la Licenciatura en Educación Básica con Énfasis en Matemáticas - Lebem, de la Universidad Distrital Francisco José de Caldas. La experiencia tiene como propósito la colaboración mutua y solidaria en contextos de diversidad, para hacer posible el acceso a la matemática a todos los niños, niñas y jóvenes de la educación básica y media de dos instituciones educativas públicas de la ciudad de Bogotá. Los principales aportes de esta vivencia de carácter exploratorio son el desarrollado en una pasantía de extensión, acompañada de unos referentes de formación, que ha permitido generar aprendizajes; y las reflexiones de carácter pedagógico y didáctico en los estudiantes para profesor sobre cómo debe realizarse los procesos de inclusión de estudiantes en condición de discapacidad visual en la clase de matemáticas en el aula regular.
Learner-adaptive partial and synchronized captions for L2 listening skill
development
Authors: Mirzaei Maryam Sadat , Meshgi Kourosh
Published: November 2019

Many language learners have difficulty practicing listening skills using
authentic materials, and thus use captions to map text with speech, and they
benefit from reading along while listening to comprehend content. However,
many learners over-rely on reading the text and many have difficulty in
dividing their attention to the multimodal input. We have proposed a
captioning tool, Partial and Synchronized Captions (PSC), which detects the
useful words to be shown in the caption for addressing learners’ listening
difficulties. To handle individual learner demands, PSC should adapt its
word selection criteria. This study proposes an Adaptive PSC (APSC), which
improves its word selection and retrains itself on-the-fly by applying
learner feedback on the generated caption to provide individualized and
effective assistance that satisfies the learners’ requirements. Preliminary
results revealed that the system was relatively successful to adapt itself
to the demand of the L2 learner, which raised learner satisfaction on the
resultant captions.
Virtual reality from the perspective of Saudi faculty
Authors: Alhudaithy Hana
Published: November 2019

Nowadays, we live in an ever-evolving technological world. There is thus
a growing need to explore the use of modern technology in education in
general, and in higher education in particular. The present paper
investigates the use and effectiveness of Virtual Reality (VR) in higher
education from the perspective of Saudi faculty at the College of Languages
and Translation, King Khalid University (KKU). A mixed-method research
design was applied. A questionnaire and focus group interviews were used to
collect quantitative and qualitative data. Results indicated a limited use
of VR among faculty due to lack of facilities, insufficient support
(particularly for junior faculty), and lack of female technicians for the
female-only campus and cultural aspects (e.g. female privacy). It is
important to consider the need for high-speed internet and enhanced
facilities for both students and faculty alike.
Negotiating for meaning in interaction: differences between virtual
exchanges and regular online activities
Authors: Canals Laia
Published: November 2019

The present research explores the interactional nature of oral tasks
carried out in two types of learner dyads in terms of their likelihood to
foster negotiation for meaning during Language Related Episodes (LREs).
Quantitative data analyses reveal how learners in same L1 dyads, Spanish
English as a Foreign Language (EFL) learners, and in different L1 dyads,
Canadian learners of Spanish and Spanish learners of English participating
in a virtual exchange, modify their speech using negotiations and
clarifications to make it comprehensible to their interlocutors. Eighteen
different L1 dyads of university learners doing a virtual exchange
(Canada-Spain) and eighteen dyads of Spanish-speakers learning English at
the Spanish university carried out three oral communicative tasks online
following the same procedures. Data were transcribed, LREs were identified,
quantified for each dyad, and analyzed to determine their characteristics in
terms of types of triggers, modified output, and type of feedback provided.
Initial findings point to substantial differences in meaning negotiation
occurring during LREs in each group. Different-L1 dyads exhibit more
clarifications, meaning negotiation, and provide more feedback, which leads
to higher amounts of comprehensible and modified output than learners in
same L1 dyads.
Potential Adsorption of Heavy Metal Ions by Eugenol Compounds and Derivatives through Ion Imprinted Polymer
Authors: Djunaidi Muhammad Cholid , Khabibi Khabibi
Published: December 2019

Research on the potential of Ion Imprinted Polymer (IIP) selective adsorption of heavy metals using eugenol compounds and their derivatives has been carried out. Isolation and synthesis of eugenol derivatives with metal selective active groups and their use as selective metal carriers have been carried out with satisfactory results. Carrier effectiveness can still be improved by methods that focus on the target molecule recognition model. This adsorption method is called Ion Imprinted Polymer (IIP). The main components of IIP are functional monomers, crosslinkers, and target molecules. The use of acrylamide and its derivatives as functional monomers is useful with a lot of success achieved but also invites danger because it includes carcinogenic substances, a nerve poison, and so on. Moreover, the N group, which is an active acrylamide group, and its derivatives are only selective towards borderline metals (HSAB theory). Alternatives that are safe and can increase their selectivity are therefore needed. Eugenol, with its three potential functional groups, is believed to be able to replace the function of acrylamide and its derivatives that can even increase the effectiveness of IIP. The purpose of this study is to determine the potential of eugenol derivatives as selective adsorbents through the IIP method. This synthesis of IIP involved the use of basic ingredients of eugenol and its derivatives (polyeugenol, EOA, polyacetate). Each base material is contacted with a metal template then crosslinked with three kinds of crosslinking agents, namely EGDMA, DVB, and bisphenol. IIP is formed after the metal template is released using acid/HCl. The outcomes obtained demonstrate that the IIP method is able to increase the metal adsorption capacity and that the IIP method for metals is largely determined by the release of metals, which will form a hole for metal entry through adsorption. Poly-Cd-DVB, Eug-Cr-DVB, Poly-Cu-bisphenol, Polyacetate -Cr-DVB are polymer materials that have the potential to make up an IIP.
The potential of Endophytic Fungal Extract Isolated from Cinnamon (Cinnamomum burmannii) as Antidiabetic and Antioxidant
Authors: Septiana Eris , Rachman Fauzy , Hapsari Yatri , Yadi Yadi , Bustanussalam Bustanussalam , Rahmawati Siti Irma , Izzati Fauzia Nurul , Simanjuntak Partomuan
Published: December 2019

An increase in blood glucose levels in people with diabetes can cause an increase in free radicals, which can worsen the disease. Thus, drugs that have antidiabetic and antioxidant activities are needed. The cinnamon plant is high in antioxidants and has long been used as a source for a diabetes drug. The utilization of endophytic fungi isolated from cinnamon plants as antidiabetic and antioxidant has never been reported. This study aims to investigate the antidiabetic as well as antioxidant activity from the extract of endophytic fungi from the cinnamon plant. The antidiabetic activity was tested using the α-glucosidase enzyme inhibition method, while antioxidant activity was tested using the DPPH free radical scavenging method. Total phenol content was measured based on the Follin-Ciocalteu reagent reaction. All endophytic fungal extracts from the cinnamon leaves, twigs, flowers, and fruit have antidiabetic and antioxidant activity as well as high total phenol content. The three parameters measured showed a positive correlation. Endophytic fungal extract of Cb.D6 isolate derived from the leaf had the highest antidiabetic and antioxidant activity among the other isolates amounting to 92.41% and 90.28%, respectively. In addition, the total phenol content of Cb.D6 isolates was also the highest with 357.83 mg equivalent to gallic acid/g extract. Therefore, the endophytic fungal extract of Cb.D6 isolate has the potential to be developed as a source of the antidiabetic and antioxidant ingredients.
Total Hyptolide of Indonesian Hyptis pectinata extracts in a various solvent using HPLC and UV-Vis spectroscopy and their toxicities
Authors: Suzery Meiny , Khumairoh Siti , Cahyono Bambang
Published: December 2019

The bioactive compound of hyptolide has been isolated from an Indonesian plant Hyptis pectinata using various solvents. The pure compound was then used as a standard in quantitative analysis using HPLC and UV-Vis spectroscopy in ethanol (EEth), ethyl acetate (EEa), acetone (Eac) and hexane (Ehex) extract each earned 3.14%, 0.01%, 1.33% and 0.04% (dry weight per sample). The standard curve of hyptolide using UV spectroscopy has been obtained with the coefficient of relationship (r) of 0.997. However, the use of spectroscopy was not recommended for the standardization of hyptolide in the extract due to interference from other compounds that absorb the same wavelength. Furthermore, the toxicity test using the Brine Shrimp lethality test shows LC50 value of 92-181 ppm, which was in EEa compared to EEth, Eac, and Ehex.
Job competition, human capital, and the lock-in effect: can unemployment insurance efficiently allocate human capital
Authors: Schwartz Jeremy
Published: November 2019

Workers, firms and policymakers often face a trade-off between shorter unemployment spells on the one hand, and better quality matches on the other. During recessions this manifests itself through job competition, where high skilled workers misallocate their labor to positions for which they are over-qualified in order get back to work faster. In the presence of job-specific human capital, as high skilled workers gain experience in this low skilled sector they may find themselves “locked in” to these jobs. This is because workers will not want to lose their seniority by searching for a job that better utilizes their general human capital. As a result, this misallocation can persist even in economic recoveries leading to inefficient outcomes. This paper explores such an economy and finds that a UI system that becomes more generous during a recession increases welfare and better allocates human capital over the business cycle.
Thrombo-inflammatory prognostic score improves qSOFA for risk stratification in patients with sepsis: a retrospective cohort study
Authors: Li Dongze , Cheng Yisong , Yu Jing , Jia Yu , Liu Bofu , Xia Yiqin , Zhang Qin , Liu Yanmei , Ma Yan , Yao Rong , Zeng Zhi , Cao Yu , Xu Shuyun
Published: November 2019

Background

Both the thrombo-inflammatory prognostic score (TIPS) and the quick sequential (sepsis-related) organ failure assessment (qSOFA) are quick prognostic scores for sepsis during the early phase, while either of two scores has limited prognostic value for sepsis patients. This study aimed to evaluate whether TIPS adds more information of sepsis risk stratification for qSOFA.

Methods

This was a retrospective cohort study of patients with sepsis in the emergency department (ED). We performed a receiver-operating characteristic curve, integrated discrimination improvement (IDI), net reclassification improvement (NRI) and decision-curve analysis (DCA) analyses to investigate whether TIPS can improve qSOFA for risk prediction in patients with sepsis. The primary endpoint was mortality and the secondary endpoints were mechanical ventilation and admission to the intensive care unit (ICU) during the 28-day follow-up.

Results

We identified 821 patients with sepsis. We randomly assigned the patients’ data to a derivation group (n = 498; n = 112 died during the 28-days follow-up) or to a validation group (n = 323; n = 61). The addition of TIPS to qSOFA (T-qSOFA) improved the area under the curve (AUC) from 0.724 to 0.824 (p < 0.001) for predicting 28-day mortality. The discrimination improvement was confirmed by an IDI of 0.092 (p < 0.001). Addition of TIPS to the qSOFA resulted in a NRI of 0.247 (p < 0.001). The DCA showed that the net benefit of T-qSOFA was higher than that of TIPS or qSOFA for any threshold probabilities.

Conclusions

The prognostic value of qSOFA for patients with sepsis was enhanced by adding the TIPS score on admission for risk prediction in patients with sepsis during early phases in the ED.
Modelling Bark Thickness of Norway Spruce (Picea abies Karst)
Authors: Musić Jusuf , Halilović Velid , Knežević Jelena , Avdagić Admir , Ibrahimspahić Aida , Balić Besim , Lojo Ahmet
Published: December 2019

Background and Purpose: Bark thickness and its share in the volume of roundwood are the most important characteristics of the bark, particularly in the process of timber harvesting, and during scaling of processed logs. Therefore it is very important to have at disposal relatively accurate data regarding these characteristics of bark for particular tree species. The main goal of this paper is to investigate the thickness of the bark and its share in the volume of roundwood of Norway spruce.
Materials and Methods: The research was carried out in the area of the Canton 10 of the Federation of Bosnia and Herzegovina and it encompassed 393 trees of Norway spruce from 10 cm to 115 cm of thickness at breast height. Measuring of the mean diameter and double thickness of bark was conducted by section method. In total, 4,647 diameters and bark thicknesses were measured in different relative lengths of stems or in average 10.6 measurements per one stem.
Results: As an optimal model for the evaluation of double thickness of the bark of Norway spruce depending on mean diameter of roundwood the function with designated determination coefficient of 0.7142 was selected. The obtained results have confirmed the previously defined relations of investigate characteristics, which are as following: a) with the increase of mean diameter of roundwood (section) double bark thickness is increased from 9.26 mm (thickness class 12.5 cm) to 31.65 mm (thickness class 92.5 cm); b) with the increase of mean diameter of roundwood the share of bark in its volume decreased from 14.26% (thickness class 12.5 cm) to 6.73% (thickness class 92.5 cm).
Conclusions: By the actual method of estimating bark thickness or the share of bark in the volume of roundwood of Norway spruce in the forestry of the Federation of Bosnia and Herzegovina a significant error was created which increases with the increase of mean diameter. The obtained results point to the necessity of investigation of these bark characteristics in Bosnia and Herzegovina and represent an inevitable starting point for making adequate tables of bark thickness and its percentage share in the volume of roundwood of Norway spruce.
Anti-insulin resistance effects of salidroside through mitochondrial quality control
Authors: You Baiyang , Dun Yaoshan , Zhang Wenliang , Jiang Lingjun , Li Hui , Xie Murong , Liu Yuan , Liu Suixin
Published: December 2019

Mitochondrial quality control (MQC) and function are determinants for cellular energy metabolism, and their disorders are reported to play an important role in the development of insulin resistance (IR). Salidroside was reported to have beneficial effects on MQC through AMPK pathway; however, it is unknown whether salidroside exerts anti-IR effect with this action. This study sought to investigate the effects of salidroside on IR with an exploration of the mechanisms of its action. Experimental IR models were adopted in high-fat-diet (HFD)-fed mice and palmitate-treated C2C12 myotubes, respectively. Blood levels of glucose and insulin as well as cellular glucose uptake were determined, and mitochondrial function and MQC-associated parameters and reactive oxygen species (ROS) production were analyzed based on treatments with the activator (AICAR), inhibitors (compound C and EX-527) or specific siRNA of Ampk/Sirt1 and mitochondrial ROS scavenger (mito-TEMPO). Protein expression level was determined by Western blot, cellular observation by transmission electron microscope and ROS production by functional analysis kits. Salidroside reduced IR and activated insulin signaling along with the stimulation of AMPK/SIRT1 signaling and downstream regulation of MQC and ROS production. These salidroside effects were comparable to those of AICAR and could be prevented by AMPK/SIRT1 inhibitors or siRNAs, respectively. Salidroside reduces IR and regulates MQC and ROS production by activating AMPK/SIRT1 signaling pathway. Since IR is a critical issue for public health, to explore a potent agent against IR is of high interest. The anti-IR effects of salidroside warrant further experimental and clinical studies.
Thin Ferromagnetic Films Deposition by Facing Target Sputtering Method
Authors: Iljinas A. , Dudonis J. , Bručas R. , Meškauskas A.
Published: December 2019

Facing targets sputtering system, constructed specially for ferromagnetic cathode sputtering, was investigated in this study. The currentvoltage (I-V ) characteristics, deposition rate dependence on the discharge power, dependence on the distance between the center axis of targets and substrate, and on distance between the targets were investigated. Magnetic field distribution between two targets was measured. FTS system has been used successfully to prepare Fe films on glass substrate in various temperatures. The highest deposition rate for this film was 2.2 nm/s when distance between targets was 70 mm and the distance between substrate and a distance from the center axis of targets was 60 mm. X-ray diffraction (XRD) and Atomic Force Microscope (AFM) were used to analyze the surface structure of Fe thin films. It was found that films crystallite sizes depend on deposition temperature.
Reflectivity Modelling of All-Porous-Silicon Distributed Bragg Reflectors and Fabry-Perot Microcavities
Authors: Samuolienė N. , Šatkovskis E.
Published: December 2019

Herein, the problem of nanocrystaline silicon laser and its importance in microelectronics are discussed upon. The features of vertical Fabry-Perot microcavities made on the base of porous silicon are described. The responses of the reflectivity of the distributed reflection Bragg mirrors and Fabry-Perot microcavities were found using transfer matrixes method for this purpose. Inherent optical parameters of porous silicon, deposited by electrochemical etch, were used in the calculations. The calculation of the reflectivity of the distributed reflection Bragg mirrors with front active layer of nanostructural porous silicon had been examined. In the second part, the features of Fabry-Perot microcavities on variation of the number of layers of the front or rear mirrors are described. The impact of the thickness of the active nanocrystaline silicon spacer between two distributed reflection Bragg mirrors upon the spectra of optical reflectivity of Fabry-Perot microcavities in the wavelength range of 0.4–0.9 µm had been examined as well. The made conclusions are important for improvement of the thickness of the active porous silicon spacer in front of Bragg mirror and the features of Fabry-Perot microcavities.
On Some Extremal Problems on Linearly Invariant Classes
Authors: Kiriyatzkii E. G. , Kirjackis J.
Published: December 2019

In present paper the definition of linearly invariant class of analytical in the right half-plane is given and some extremal problems on introduced class are solved. For solving we use method based on variational formulas with specially introduced omega-operator, defined on these classes. In case when domain is unit disk similar linearly invariant classes were considered by Ch. Pommerenke, V. Starkov, E.G. Kiriyatzkii.
Weakly Nonlocal Supersymmetric KdV Hierarchy
Authors: Miškinis P.
Published: December 2019

The present work offers a weakly nonlocal generalization of superKdV, which possesses also an unlimited number of conservation laws and exact solutions.
Chaos to Order: Role of Toxin Producing Phytoplankton in Aquatic Systems
Authors: Upadhyay R. K. , Chattopadhyay J.
Published: December 2019

Toxin producing phytoplankton (TPP) plays an important role in aquatic systems. To observe the role of TPP, we consider a three species food chain model consisting of TPP-zooplankton-fish population. The similar type of model considered by Upadhyay et al. [1] for terrestrial ecosystem and obtained chaotic dynamics in some region of parametric space. We modify their models by taking into account the toxin liberation process of TPP population and represented as aquatic systems. We consider Holling type I, type II and type III functional forms for this process. We observe that increasing the strength of toxic substance change the state from chaos to order. Our conclusion is that TPP has a stabilizing contribution in aquatic systems and may be used as a bio-control mechanism.
On a Nonlinear System of Reaction-Diffusion Equations
Authors: Afrouzi G. A. , Rasouli S. H.
Published: December 2019

The aim of this article is to study the existence of positive weak solution for a quasilinear reaction-diffusion system with Dirichlet boundary conditions,− div(|∇u1|p1−2∇u1) = λu1α11u2α12... unα1n,   x ∈ Ω,− div(|∇u2|p2−2∇u2) = λu1α21u2α22... unα2n,   x ∈ Ω, ... , − div(|∇un|pn−2∇un) = λu1αn1u2αn2... unαnn,   x ∈ Ω,ui = 0,   x ∈ ∂Ω,   i = 1, 2, ..., n, 

where λ is a positive parameter, Ω is a bounded domain in RN (N > 1) with smooth boundary ∂Ω. In addition, we assume that 1 < pi < N for i = 1, 2, ..., n. For λ large by applying the method of sub-super solutions the existence of a large positive weak solution is established for the above nonlinear elliptic system.
Inclusive rural development: a scientific discourse
Authors: Borodina Olena , Prokopa Ihor
Published: December 2019

The article considers the essential features of rural development as a multi-vector process, which not only involves economic growth in rural areas, but also requires its adaptation to human behavior, social and political structure of rural communities and their involvement in development processes. It also reflects systemic positive changes in rural areas, which are initiated "from bottom" and supported "from top". In this concept of rural development, inclusiveness is inherent. The authors show that the development of the concept of "inclusive rural development" took place in the process of enrichment and specification of the theoretical concepts of sustainable development, inclusive growth and inclusive development in relation to the rural sector of society. This concept denotes a development whose result consists in the creation of proper conditions for the rural population for such purposes as: the use of land and other local resources in the economic activities; adequate distribution of the results of economic growth in the agriculture and other sectors of the rural economy; and participation in social and public life for the consolidation of communities and observance of human rights. Such development leads to the reduction of poverty, overcoming the economic, social and political exclusion of people residing in rural areas. It is pointed out that ensuring the inclusive development is a function of the state regulation of national economy. To implement it in Ukraine, it is necessary to ensure, first of all, the implementation, in the regulatory and legal framework, of the global goals of sustainable development and the objectives for their achievement. That could be realized by adopting the Law on the Strategy for Sustainable Development until 2030, and, in the part of inclusive rural development, also the Law on the Basic Principles of the State Agrarian Policy and State Policy of Rural Development.
On Goldstone Fields with Spin Higher than 1/2
Authors: Sorokin D. P.
Published: November 2019

We review the properties of 3d non-linear models of vector and vector-spinor Goldstone fields associated with the spontaneous breaking of certain higher-spin counterparts of supersymmetry (so-called Hietarinta algebras), whose Lagrangians are of the Volkov–Akulov type. At the quadratic order, these Lagrangians contain, respectively, the Chern–Simons and Rarita–Schwinger terms. The vector Goldstone model has a propagating degree of freedom which, in a decoupling limit, is a quartic Galileon scalar field (similar to those appearing in models of modified gravity). On the other hand, the vector-spinor goldstino retains the gauge symmetry of the Rarita–Schwinger action and eventually reduces to the latter by a non-linear field redefinition. We thus find that, in three space-time dimensions, the free Rarita–Schwinger action is invariant under a hidden rigid symmetry generated by fermionic vector-spinor operators and acting non-linearly on the Rarita–Schwinger goldstino.
A Solution to the Soccer Ball Problem for Generalized Uncertainty Relations
Authors: Lake M. J.
Published: November 2019

We propose a new method for generating generalized uncertainty relations (GURs) including the generalized uncertainty principle (GUP), extended uncertainty principle (EUP), and extended generalized uncertainty principle (EGUP), previously proposed in the quantum gravity literature, without modifying the Heisenberg algebra. Our approach is compatible with the equivalence principle, and with local Poincar´e invariance in the relativistic limit, thus circumventing many of the problems associated with GURs derived from modified commutation relations. In particular, it does not require the existence of a nonlinear additional law for momenta. This allows sensible multi-particle states to be constructed in which the total momentum is macroscopic, even if the momentum of an individual particle is bounded by the Planck momentum, thus providing a resolution of the “soccer ball problem” that plagues current approaches to GURs.
Generalized Uncertainty Principle in Quantum Cosmology
Authors: Kuzmichev V. E. , Kuzmichev V. V.
Published: November 2019

The effects of gravity which manifest themselves when performing the simultaneous measurement of two non-commuting observables in the quantum theory are discussed. Matter and gravity are considered as quantum fields. The Schr¨odinger-type time equation is given for the case of a finite number of degrees of freedom: one for the matter field and one for geometry. For a spatially closed system filled with dust and radiation being in definite quantum states, the solutions to the quantum equations are found, and the existence of the minimum measurable length and the minimum momentum is shown. It appears that the simultaneous measurement of fluctuations of the intrinsic and extrinsic curvatures of the spacelike hypersurface in spacetime cannot be performed with an accuracy exceeding the Planck constant. Unruh’s and Bronstein’s uncertainty relations are discussed.
On Reaction of a Spinning Particle on the Spacetime Curvature
Authors: Plyatsko R. M. , Fenyk M. T.
Published: November 2019

The reaction of a classical (nonquantum) spinning particle on the spacetime curvature according to the Mathisson–Papapetrou equations is analyzed. From the point of view of the observer comoving with the particle in Schwarzschild’s field, this reaction is a reaction on the gravitomagnetic components of the gravitational field. The values of these components significantly depend on the relativistic Lorentz factor calculated by the particle velocity relative to the Schwarzschild mass. As a result, the value of the spinning particle acceleration relative to the geodesic motion is proportional to the second power of the Lorentz factor. At the same time, the intensity of the electromagnetic radiation of a charged spinning particle is proportional to the fourth power of this factor. Some numerical estimates are presented.
Relativistic Equations for Arbitrary Spin, Especially for the Spin s = 2
Authors: Simulik V. M.
Published: November 2019

The further approbation of the equation for the particles of arbitrary spin introduced recently in our papers is under consideration. The comparison with the known equations suggested by Bhabha, Pauli–Fierz, Bargmann–Wigner, Rarita–Schwinger (for spin s =3/2) and other authors is discussed. The advantages of the new equations are considered briefly. The advantage of the new equation is the absence of redundant components. The important partial case of spin s =2 is considered in details. The 10-component Dirac-like wave equation for the spin s =(2,2) particle-antiparticle doublet is suggested. The Poincar´e invariance is proved. The three-level consideration (relativistic canonical quantum mechanics, canonical Foldy–Wouthuysen-type field theory, and locally covariant field theory) is presented. The procedure of our synthesis of arbitrary spin covariant particle equations is demonstrated on the example of spin s =(2,2) doublet.
Polarization of the Vacuum of the Quantized Spinor Field by a Topological Defect in the Two-Dimensional Space
Authors: Sitenko Yu. A. , Gorkavenko V. M.
Published: November 2019

The two-dimensional space with a topological defect is a transverse section of the three-dimensional space with an Abrikosov–Nielsen–Olesen vortex, i.e. a gauge-flux-carrying tube which is impenetrable for quantum matter. Charged spinor matter field is quantized in this section with the most general mathematically admissible boundary condition at the edge of the defect. We show that a current and a magnetic field are induced in the vacuum. The dependence of results on the boundary conditions is studied, and we find that the requirement of finiteness of the total induced vacuum magnetic flux removes an ambiguity in the choice of boundary conditions. The differences between the cases of massive and massless spinor matters are discussed.
Black Hole Mimickers in Astrophysical Configurations with Scalar Fields
Authors: Stashko O. S. , Zhdanov V. I.
Published: November 2019

We study static spherically symmetric configurations of General Relativity in the presence of one scalar field (SF). For a monomial SF potential, the solutions of the Einstein SF equations are obtained numerically; then we get distributions of stable circular orbits around the configuration and build images of the corresponding “accretion disks” from the perspective of a distant observer. We discuss also a similar problem in the case of analytic solution with a specially selected SF potential that allows the existence of a black hole. We show that the images are similar in many cases to the case of ordinary Schwarzschild black hole with a luminous ring and a dark spot at the center. On the other hand, a certain selection of model parameters leads to specific features in these images that may help to exclude some exotic models.
The taxation of subjects and objects of forestry enterprises in Ukraine: features, mechanisms and outlook
Authors: Harasym Petro , Klym Nadia , Hrytsak Oksana , Reverchuk Serhij
Published: November 2019

The research examines the peculiarities of the taxation of forestry enterprises in Ukraine. The current problem is determined by changes in tax legislation, which will negatively affect the activity of forestry enterprises, raise the prices of lumber, lower the quality of forestry indicators, lead to a decline of hunting sector, as well as an insufficiency of financial support for forestry development in general. The study analysis of the current tax legislation of Ukraine, which allowed issues of forestry taxation to be identified, in particular, with regard to a new approach to calculation and payment of a new land tax on forests (land tax). Such tax regulation of forestry can lead to a number of negative consequences for the economy as a whole. The research concludes with the suggestions to cancel this new tax collection on forestry land and to make appropriate amendments to the Tax Code of Ukraine.
Aspect in the English language: a comparative analysis of form and meaning in traditional descriptive grammars
Authors: Lessa Adriana , Salgado Maria das Graças
Published: December 2019

ABSTRACT Aspect in the English language has been described through different categories and terminologies, which might lead teachers and students into some misunderstandings. Considering the importance of understanding the systematic representation of this concept in learning a foreign language, we review and compare the various ways aspect is presented in five of the most traditional descriptive English grammar books. We examined whether aspect is explicitly approached; how it is defined; categorized and whether the types of aspect are clearly explained in terms of meaning. Based on that, we contrasted their classification and terminology with an alternative approach, highlighting ambiguities and common grounds.
O plano de texto do artigo científico: caracterização e perspectivas didáticas
Authors: Silva Paulo Nunes da , Rosa Rute
Published: December 2019

RESUMO Este artigo tem como objetivo explicitar as principais propriedades dos planos de texto de quatro artigos científicos produzidos em áreas disciplinares distintas (Ciências vs. Ciências Sociais e Humanas/Humanidades), com vista a uma aplicação ao ensino de gêneros, no âmbito da promoção do letramento acadêmico e, mais especificamente, da didática dos gêneros. Privilegia-se o quadro teórico do Interacionismo Sociodiscursivo (Bronckart [1997] 1999, 2010), as propostas da escola de língua francesa da Linguística Textual (Adam 2001) e os princípios da Didática dos Gêneros (Schneuwly e Dolz 2004; Dolz e Gagnon 2008; Dolz 2011). Para tal, foi adotada uma abordagem descendente, partindo do social para os textos e privilegiando uma metodologia de análise qualitativa de cunho descritivo, de acordo com a qual se procedeu à análise comparativa das propriedades de quatro exemplares do gênero artigo científico, inscritos em diferentes áreas de investigação. Os dados obtidos mostram a grande flexibilidade do gênero artigo científico a nível do plano de texto, sendo evidenciadas diversas adaptações em função da área de investigação em que cada texto é produzido.
População em situação de rua e políticas públicas: representações na Folha de São Paulo
Authors: Resende Viviane de Melo , Mendonça Daniele Gruppi de
Published: December 2019

Resumo Neste artigo, discutimos a representação da situação de rua nas notícias sobre políticas públicas veiculadas no portal Folha de S. Paulo (FSP) entre 2011 e 2013. Nosso objetivo é refletir sobre como essas representações influenciam na percepção do problema social como foco da ação pública e sua pauta na agenda pública. Para isso, mapeamos 105 textos tematizando políticas públicas dos 460 coletados sobre a situação de rua. O material foi explorado com o auxílio do software NVivo. Com base nos estudos críticos do discurso, investigamos, principalmente, quais vozes são convocadas para falar sobre/por essa população e como o grupo é avaliado nesse contexto temático. A análise permite sustentar que a representação da situação de rua é preconceituosa, e sugerir que essa visão pode contribuir para a definição de políticas públicas higienistas e sua aceitação social.
Chagas disease is associated with a poor outcome at 1-year follow-up after cardiac resynchronization therapy
Authors: Passos Luiz Carlos Santana , Melo Rodrigo Morel Vieira de , Lira Yasmin Menezes , Oliveira Natalia Ferreira Cardoso de , Trindade Thiago , Carvalho William , Fagundes Alexsandro
Published: December 2019

SUMMARY BACKGROUND: Cardiac resynchronization therapy (CRT) is a therapeutic modality for patients with heart failure (HF). The effectiveness of this treatment for event reduction is based on clinical trials where the population of patients with Chagas' disease (DC) is underrepresented. OBJECTIVE: To evaluate the prognosis after CRT of a population in which CD is an endemic cause of HF. METHODS: A retrospective cohort conducted between January 2015 and December 2016 that included patients with HF and left ventricular ejection fraction (LVEF) of less than 35% and undergoing CRT. Clinical and demographic data were collected to search for predictors for the combined outcome of death or hospitalization for HF at one year after CRT implantation. RESULTS: Fifty-four patients were evaluated, and 13 (24.1%) presented CD as the etiology of HF. The mean LVEF was 26.2± 6.1%, and 36 (66.7%) patients presented functional class III or IV HF. After the mean follow-up of 15 (±6,9) months, 17 (32.1%) patients presented the combined outcome. In the univariate analysis, CD was associated with the combined event when compared to other etiologies of HF, 8 (47%) vs. 9 (13,5%), RR: 3,91 CI: 1,46–10,45, p=0,007, as well as lower values of LVEF. In the multivariate analysis, CD and LVEF remained independent risk factors for the combined outcome. CONCLUSION: In a population of HF patients undergoing CRT, CD was independently associated with mortality and hospitalization for HF.
Parkinson's disease and wearable devices, new perspectives for a public health issue: an integrative literature review
Authors: Godoi Bruno Bastos , Amorim Gabriel Donato , Quiroga Daniel Gonçalves , Holanda Vanessa Milanesi , Júlio Thiago , Tournier Marcelo Benedet
Published: December 2019

SUMMARY Parkinson's disease is the second most common neurodegenerative disease, with an estimated prevalence of 41/100,000 individuals affected aged between 40 and 49 years old and 1,900/100,000 aged 80 and over. Based on the essentiality of ascertaining which wearable devices have clinical literary evidence and with the purpose of analyzing the information revealed by such technologies, we conducted this scientific article of integrative review. It is an integrative review, whose main objective is to carry out a summary of the state of the art of wearable devices used in patients with Parkinson's disease. After the review, we retrieved 8 papers. Of the selected articles, only 3 were not systematic reviews; one was a series of cases and two prospective longitudinal studies. These technologies have a very rich field of application; however, research is still necessary to make such evaluations reliable and crucial to the well-being of these patients.
Força de preensão palmar e desempenho funcional em mulheres de meia-idade e idosas com artrite reumatoide
Authors: Diogo Karla Gonçalves , Ribeiro-Samora Giane Amorim , Kakehasi Adriana Maria , Lustosa Lygia Paccini
Published: December 2019

RESUMO A força de preensão palmar em mulheres com artrite reumatoide pode estar comprometida devido à presença de deformidades e restrições funcionais impostas pela doença. Existem poucas informações na literatura sobre a diferença de força de preensão e funcionalidade em mulheres adultas e idosas com artrite reumatoide. O objetivo foi comparar a força de preensão palmar, capacidade funcional, e fadiga entre mulheres adultas (meia idade) e idosas com artrite reumatoide e verificar a associação destas variáveis nas duas faixas etárias. Participaram mulheres com artrite reumatoide, acima de 45 anos, com marcha independente, divididas em grupo de adultas (45 a 59 anos) e idosas (60 anos e mais). Foram mensuradas a força de preensão palmar (dinamômetro Jamar®), capacidade funcional (velocidade de marcha) e fadiga (Functional Assessment of Chronic Illness Therapy); feitas comparações entre grupos de idade pelo teste t-Student independente, e associação entre as variáveis, em cada grupo, pelo teste de correlação de Pearson. Foi verificado nível de significância de 5% e a força de preensão palmar foi maior no grupo de idosas (p=0,01). No grupo de adultas, houve associação entre capacidade funcional e fadiga (r=0,53; p=0,01) e no grupo de idosas, houve associação entre força de preensão palmar e velocidade de marcha (r=0,51; p=0,02). Os resultados demonstraram que as idosas estavam em melhores condições musculares. Parâmetros indicados, como marcadores de desempenho funcional e muscular em idosas demonstraram estar associados, confirmando o uso destes marcadores nesta condição específica.
Déficits motores e preditores de perda de mobilidade ao final da internação em indivíduos com neurotoxoplasmose
Authors: Araujo Isabella Ribeiro , Ferreira Ane Carolline Gonzaga , Vento Daniella Alves , Guimarães Viviane Assunção
Published: December 2019

RESUMO A neurotoxoplasmose (NTX) é uma das principais doenças oportunistas presentes em indivíduos portadores do vírus da imunodeficiência humana (HIV). A doença promove lesões cerebrais focais com efeito de massa que podem gerar uma variedade de sequelas capazes de comprometer a realização das atividades da vida diária, dentre elas, a deambulação. O objetivo deste estudo foi verificar os principais déficits motores apresentados e identificar os fatores de risco para a perda de mobilidade ao final da internação. Trata-se de um estudo observacional cuja amostra foi composta por dados de prontuários de indivíduos portadores do vírus HIV e diagnóstico de NTX. Foi realizada a revisão de prontuários eletrônicos e a classificação da mobilidade hospitalar, além da coleta de dados clínicos e epidemiológicos. Aplicou-se estatística descritiva e regressão logística binária. Foram avaliados 161 prontuários, com prevalência do sexo masculino e mediana de idade de 39 anos. Os déficits motores na admissão foram a ausência de deambulação (42,9%), hemiparesia (42,3%), paresia de membros inferiores (37,3%), déficit de equilíbrio (35,4%). Ao final da internação 32,9% não deambulavam. Os preditores para perda da mobilidade ao final da internação foram: utilização de ventilação mecânica invasiva (VMI), inclusão no programa de cuidados paliativos e não deambular na admissão. Os principais déficits motores foram a ausência de deambulação, a hemiparesia à direita e o déficit de equilíbrio.
Sistematização de instrumentos de avaliação para os dois primeiros anos de vida de bebês típicos ou em risco conforme o modelo da CIF
Authors: Mélo Tainá Ribas , Araujo Luize Bueno de , Novakoski Karize Rafaela Mesquita , Israel Vera Lúcia
Published: December 2019

RESUMO O objetivo deste trabalho foi identificar instrumentos de avaliação do desenvolvimento neuropsicomotor (DNPM) de crianças de 0 a 2 anos, de baixo custo, que possam ser usados no contexto de creche e/ou ambiente clínico em programas de intervenção precoce, sistematizando esses instrumentos conforme o modelo biopsicossocial da Classificação Internacional de Funcionalidade, Incapacidade e Saúde (CIF). Foram selecionados instrumentos de avaliação do DNPM com tradução ou adaptação para o Brasil. Para isso os domínios da CIF foram escolhidos triangulando o checklist da própria CIF-CJ, core set de estimulação precoce e a última versão da CIF, para busca na literatura de instrumentos de avaliação. A sistematização das categorias selecionadas da CIF foi realizada por dois fisioterapeutas, e um terceiro para itens discordantes. As escalas que responderam aos critérios foram: Alberta Infant Motor Scale (AIMS), Teste de Triagem de Denver II, Inventário Pediátrico sobre Qualidade de Vida (PedSQl®), Affordance in the Home Environment for Motor Development-Infant Scale (AHEMD-IS) e vínculo mãe-bebê. Mesmo com essas escalas, verificou-se a necessidade de um questionário de anamnese complementar para o responsável, dados da Caderneta de Saúde da Criança e de um questionário socioeconômico da Associação Brasileira de Empresas de Pesquisa para o Brasil (ABEP). Essa sistematização está disponível no apêndice, e procura facilitar o olhar ampliado do fisioterapeuta ou profissional da educação com abrangência biopsicossocial dos bebês, além de possibilitar a identificação de riscos de forma precoce e subsidiar ações de promoção e intervenção em diferentes contextos.