bluuebunny/crossref_metadata_2025 huggingface dataset:
Quantum Chemical Studies on the Spectroscopic, Electronic Structural and Nonlinear Properties of an Organic N-Methyl-N- (2,4,6-Trinitrophenyl) Nitramide Energetic Molecule
Authors: Veerappan Anbu , Arumugam Vijayalakshmi Karattadipalayam
Published: February 2019

Background:

Earlier studies on the energetic molecule MTNPN show a small HOMO-LUMO energy gap. In general, the material which acquires small energy gap exhibits NLO response and identical counterparts in both IR and Raman spectra. Hence, the combined experimental and theoretical studies were performed to explore the fundamental properties of the molecule.

Objective:

The objective of this study was to explore the fundamental structural properties of an energetic molecule MTNPN in addition to its application as a nonlinear optical material.

Methods:

FT-IR technique and quantum chemical methods were used to analyze the vibrational normal modes and structural properties of the molecule. Kurtz and Perry technique is used to find second harmonic generation efficiency in comparison to the standard NLO reference material.

Results:

The potential energy distribution was used to assign the vibrational normal modes of the molecule. The second order perturbation energies between the lone pair and anti-bonding species were predicted to understand the driving forces of molecular stability. The chemical reactivity of the molecule was determined from the molecular electrostatic potential surface and global reactivity descriptor results. The second-order hyperpolarizability of MTNPN and SHG efficiency of MTNPN were studied to find its NLO response and it was found from the results that MTNPN exhibits high NLO response than the standard NLO reference material.

Conclusion:

The vibrational degrees of freedom of MTNPN molecule were assigned and the experimental FT-IR spectra were compared with the scaled harmonic frequencies. The predicted second-order hyperpolarizability of MTNPN was about 6.46 times greater than the standard NLO reference urea. The interacting species between the lone pair orbitals and antibonding orbitals such as n3O8→ π*(N7-O9), n3O11→ π*(N10-O12) and n3O14→ π*(N13-O15) stabilized the molecule to a greater extent.
Field Experiment Testbed for Forest Fire Detection using Wireless Multimedia Sensor Network
Authors: Noureddine Houache , Bouabdellah Kechar
Published: February 2019

Forest fire disasters have arisen each year due to a number of factors. The main interest of
the authorities is to fight against these fires as early as possible with a minimum of damage, by exploiting
recent technologies suitable for this field. In this paper, we present the design and the implementation
of a forest fire detection system based on the Wireless Multimedia Sensor Networks
(WMSN) technology applied to our region (M'sila forest, Oran city - Algeria) using a field experiment
testbed with low cost hardware and software. In our previous study, the designed system detects
the fire using a mono modal approach (the sensed data was scalar in nature such as the temperature
and humidity). In this work, we enhanced this system by collecting, in addition, richer information
sources using cameras as data sources (by capturing images) to eliminate the false alarms
which present the main weakness of the first system. We call this new system as Multimedia Forest
Fire System (M2FS). Field experiments that we have carried out using the testbed under different
scenarios by evaluating the image compression, time constraint and energy consumption, allowed us
to validate our chosen technology (Arduino mote) for any application (scalar or multimedia), and also
revealed the supremacy of the multimodal approach to mitigate efficiently false alarms.
Optimization of Solid Lipid Nanoparticles of Ezetimibe in Combination with Simvastatin Using Quality by Design (QbD)
Authors: Borderwala Kruti , Swain Ganesh , Mange Namrata , Gandhi Jaimini , Lalan Manisha , Singhvi Gautam , Shah Pranav
Published: February 2019

Background:

The objective of this study was to develop solid lipid nanoparticles (SLNs) of
poorly water soluble anti-hyperlipidemic drugs-Ezetimibe in combination with Simvastatin.

Methods:

This study describes a 32 full factorial experimental design to optimize the formulation of drug
loaded lipid nanoparticles (SLN) by the high speed homogenization technique. The independent variables
amount of lipid (GMS) and amount of surfactant (Poloxamer 188) were studied at three levels and arranged
in a 32 factorial design to study the influence on the response variables- particle size, % entrapment
efficiency (%EE) and cumulative drug release (% CDR) at 24 h.

Results:

The particle size, % EE and % CDR at 24 h for the 9 batches (B1 to B9) showed a wide variation
of 104.6-496.6 nm, 47.80-82.05% (Simvastatin); 48.60-84.23% (Ezetimibe) and 54.64-92.27% (Simvastatin);
43.8-97.1% (Ezetimibe), respectively. The responses of the design were analysed using Design Expert
10.0.2. (Stat-Ease, Inc, USA), and the analytical tools of software were used to draw response surface
plots. From the statistical analysis of data, polynomial equations were generated. Optimized formulation
showed particle size of 169.5 nm, % EE of 75.43% (Simvastatin); 79.10% (Ezetimibe) and 74.13%
(Simvastatin); 77.11% (Ezetimibe) %CDR after 24 h. Thermal analysis of prepared solid lipid nanoparticles
gave indication of solubilisation of drugs within lipid matrix.

Conclusion:

Fourier Transformation Infrared Spectroscopy (FTIR) showed the absence of new bands for
loaded solid lipid nanoparticles indicating no interaction between drugs and lipid matrix and being only
dissolved in it. Electron microscope of transmission techniques indicated sphere form of prepared solid
lipid nanoparticles with smooth surface with size approximately around 100 nm.
Fabrication and Characterization of Gelatin Electrospun Fiber Containing Cardamom Essential Oil
Authors: Farahmand Maryam , Alavi Nasireh , Khalesi Mohammadreza
Published: February 2019

Background:

Gelatin electrospun fibers incorporated with extracted cardamom Essential
Oil (EO) were developed and characterized.

Materials & Methods:

The gelatin solutions were evaluated in terms of conductivity, morphology,
fourier transform infrared spectroscopy, and the effect of cardamom EO on the gelatin fibers. Cardamom
EO showed significant antioxidant activity with IC50 value of 5 μg/mL. The extract contained
several active components including Cyclohexene, 1-methyl-4-(1-methylethylidene) and
Eucalyptol (1.8-cineol) as the most abundant components.

Results:

The images of the scanning electron microscopy revealed formation of nanofibers from
gelatin solution with significant entanglement. Furthermore, discrete beads were appeared by
increasing the concentrations of cardamom EO in the gelatin fibers. Reduction in conductivity
parameter of EO solutions could explain the observed defects. The fourier transform infrared spectra
showed the formation of hydrogen bonds in gelatin fibers. The infrared as well as spectrophotometric
spectra confirmed that EO was effectively involved in electrospun fibers.

Conclusion:

In conclusion, gelatin –a natural biopolymer, incorporated with cardamom EO forms
smooth fabricated electrospun nanofibers.
Intuitionistic Level Set Segmentation for Medical Image Segmentation
Authors: Arora Jyoti , Tushir Meena
Published: February 2019

Introduction:

Image segmentation is one of the basic practices that involve dividing an
image into mutually exclusive partitions. Learning how to partition an image into different segments
is considered as one of the most critical and crucial step in the area of medical image analysis.

Objective:

The primary objective of the work is to design an integrated approach for automating the
process of level set segmentation for medical image segmentation. This method will help to overcome
the problem of manual initialization of parameters.

Methods:

In the proposed method, input image is simplified by the process of intuitionistic fuzzification
of an image. Further segmentation is done by intuitionistic based clustering technique incorporated
with local spatial information (S-IFCM). The controlling parameters of level set method are
automated by S-IFCM, for defining anatomical boundaries.

Results:

Experimental results were carried out on MRI and CT-scan images of brain and liver. The
results are compared with existing Fuzzy Level set segmentation; Spatial Fuzzy Level set segmentation
using MSE, PSNR and Segmentation Accuracy. Qualitatively results achieved after proposed
segmentation technique shows more clear definition of boundaries. The attain PSNR and MSE value
of propose algorithm proves the robustness of algorithm. Segmentation accuracy is calculated for the
segmentation results of the T-1 weighted axial slice of MRI image with 0.909 value.

Conclusion:

The proposed method shows good accuracy for the segmentation of medical images.
This method is a good substitute for the segmentation of different clinical images with different modalities
and proves to give better result than fuzzy technique.
SDRFHBLoc- A Secure Framework for Localization in Wireless Sensor Networks
Authors: Prashar Deepak , Jyoti Kiran , Kumar Dilip
Published: February 2019

Background:

Deployment of nodes and their security always remain the main point of
concern in Wireless Sensor Networks (WSNs). Applications that are position-centric, location estimation
is the major requirement and this leads to the emergence of various localization techniques.
There are broadly two types of localization methods: range-based and free- range. Along with the
position estimation, security of the position computation process is the prime concern as the wrong
position estimation through the presence of adversaries in the environment may compromise the
whole process. There are some localization systems that are estimating the position coordinate values
of the nodes, but none of them has addressed the issues to overcome the inclusion of the adversaries
effect on the localization process.

Methods:

Here, we develop and analyze a new framework SDRFHBLoc (Secure Distributed Range
Free Hop Based Localization) that provides the functionality for the deployment of nodes based on
different aspects like the node amount, malicious node amount, range and deployment area. Security
features are also integrated in the system based on authentication of the nodes who are participating
in the localization process using the signature generation and verification.

Results:

The proposed security framework removes the faulty nodes from the network before they
participate in the localization process through the improved DV-Hop approach which is implemented
in the system. Also, the optimization of the entire process provides the best and precise position
estimation using the Particle Swarm Optimization (PSO) module.
Method for experimentally determining N-A-S-(H) solubility
Authors: Williamson Trevor , Han Joonkyoung , Katz Lynn , Sant Gaurav , Juenger Maria
Published: February 2019

Inorganic polymer binders, also sometimes called geopolymers or alkali-activated cements, can serve as an alternative to ordinary portland cement (OPC) in concrete.  The development of thermodynamic models to predict phase development and, ultimately, engineering properties, of inorganic polymer binders is an important step toward enabling their widespread use. However, such models require self-consistent solubility data of the primary phase in inorganic polymer binders, sodium aluminosilicate hydrate(s). To date, there is very little solubility information available for this phase. Here, a rigorous method for synthesizing sodium aluminosilicate hydrate(s) of controlled composition, and for measuring its solubility is presented. This approach allows complete stoichiometric control over the (initial) solution composition to elucidate directly the development of N-A-S-H composition as it relates to a given solution composition. A review of previous literature related to the solubility of other cementitious materials is presented, and the need for thermodynamic data is discussed. Finally, a sample calculation is presented for determining the solubility product (Ksp) of a laboratory synthesized sodium aluminosilicate hydrate.
Фотонные кристаллы на основе сред с произвольной анизотропией диэлектрической и магнитной проницаемостей
Authors: Глинский Г.Ф.
Published: February 2019

AbstractA general approach to analyzing eigenmodes in anisotropic and gyrotropic 3D photonic crystals based on dielectric and magnetic media is proposed. This approach is based on the representation of stationary macroscopic Maxwell equations in the operator form corresponding to the quantum-mechanical equation for a photon with spin s = 1. In these equations, the strengths of electric and magnetic fields are put into correspondence with state vectors in the complex Hilbert space. The permittivity and permeability serve as operators acting on these vectors. It is shown that the problem of determining the eigenmodes of a photonic crystal is reduced to searching for eigenvectors and eigenvalues of the Hermitian operator characterizing the spin–orbit interaction of a photon in the periodic anisotropic medium under study. It is proposed to use photon states with a certain wave vector (certain momentum) and a certain linear or circular spin polarization as a basis for the representation operator equations. One-dimensional photonic crystals are considered as an example. The influence of anisotropy and gyrotropy on the dispersion of eigenmodes in these crystals is investigated. The group velocity of the eigenmodes, momentum transferred by them, and spin angular momentum are analyzed for the case of gyrotropic media.
Оптические и кинетические характеристики импульсного разряда в гелии с парами железа при атмосферном давлении
Authors: Курбанисмаилов В.С. , Майоров С.А. , Омаров О.А. , Рагимханов Г.Б.
Published: February 2019

AbstractThe emission spectrum of a near-cathode plasma of a pulsed discharge in atmospheric pressure helium reveals spectral lines of electrode material. Numerical simulation of the kinetics by the Monte Carlo method shows that starting with a fraction of percent, the addition of iron atoms to helium strongly affect the ionization-drift characteristics of electrons in gas.
Численное и экспериментальное исследования оптимизированного p-SOS-диода
Authors: Люблинский А.Г. , Белякова Е.И. , Грехов И.В.
Published: February 2019

AbstractWe report on the results of experimental investigation and numerical simulation of switching of SOS diode with p ^+ P _0 n ^+ structure and with reduced thickness of P _0-base. The proposed 1D diffusion-drift model of electron–hole plasma dynamics is found to be in good agreement with the experiment. The reduction of the P _0-base thickness has allowed us to double the output pulse voltage with the same switching current density. This has been reached by a considerable reduction of switching losses as well as due to the formation of the domain of a strong quasi-rectangular electric field at the P _0 n ^+ junction during the current interruption. As a result, output pulse amplitude considerably exceeds the static breakdown voltage of P _0 n ^+ junction. This effect has been observed for the first time for high-voltage semiconductor opening switches.
Кристаллическая структура и люминесценция комплекса [Dy(NO-=SUB=-3-=/SUB=-)-=SUB=-2-=/SUB=-(HMPA)-=SUB=-4-=/SUB=-](NO-=SUB=-3-=/SUB=-)
Authors: Буквецкий Б.В. , Мирочник А.Г. , Жихарева П.А.
Published: February 2019

AbstractThe crystal structure of the [Dy(NО_3)_2(HMPA)_4](NО_3) complex (HMPA is hexamethylphosphorotriamide) is studied by X-ray diffraction analysis. The crystals are constructed of two crystallographically independent complex cations [Dy(NО_3)_2(HMPA)_4]^+ and outer-sphere [NO_3]^−1 groups. The structure is represented by separate С_24Н_72DyN_15O_13P_4 complexes bound by van der Waals interactions with pronounced layered morphology. The coordination polyhedron of Dy(III) with coordination number 8 is represented by a distorted trigonal prism with two centered square faces. The results of investigation of the luminescent properties in the visible and near-IR regions are presented.
Оптико-энергетические свойства тонких пленок CdS, полученных методом высокочастотного магнетронного распыления
Authors: Петрусь Р.Ю. , Ильчук Г.А. , Кашуба А.И. , Семкив И.В. , Змийовська Е.О.
Published: February 2019

AbstractThe results of experimental and theoretical studies of the optical-energy properties of CdS thin films are reported. The synthesis procedure and the results of structural and optical studies of CdS thin films deposited on the surface of a glass substrate are given. Within the framework of the pseudopotential method, the dynamics of changing the parameters of the electronic subsystem of the CdS film is theoretically studied. The direct gap nature of the bandgap of the film and the genesis of the conduction and valence bands are established. Using the Kramers–Kronig relations, absorption and reflection spectra that satisfactorily correlate with the experimental data are obtained.
Исследование внутренней структуры микрорезонаторов методом оптической томографии
Authors: Левин Г.Г. , Минаев В.Л. , Миньков К.Н. , Ермаков М.М. , Самойленко А.А.
Published: February 2019

AbstractA microscope for studying internal inhomogeneities of the refractive index of optical dielectric microcavities by optical tomography is developed. The influence of these inhomogeneities on the Q factor of optical dielectric microcavities formed by thermal treatment is experimentally studied.
End User–Informed Mobile Health Intervention Development for Adolescent Cannabis Use Disorder: Qualitative Study (Preprint)
Authors: Bagot Kara , Hodgdon Elizabeth , Sidhu Natasha , Patrick Kevin , Kelly Mikaela , Lu Yang , Bath Eraka
Published: February 2019

BACKGROUND

The rates of cannabis use continue to increase among adolescents and the current interventions have modest effects and high rates of relapse following treatment. There is increasing evidence for the efficacy of mobile technology–based interventions for adults with substance use disorders, but there is limited study of this technology in adolescents who use cannabis.

OBJECTIVE

The goal of our study was to elucidate elements of an app-based adjunctive intervention for cannabis cessation that resonate with adolescents who use cannabis.

METHODS

Adolescents, aged between 14 and 17 years, who used cannabis were recruited from San Diego County high schools. Semistructured focus groups (6 total; N=37) were conducted to examine the ways in which participants used smartphones, including the use of any health behavior change apps, as well as to elicit opinions about elements that would promote engagement with an app-based intervention for adolescent cannabis cessation. An iterative coding structure was used with first cycle structural coding, followed by pattern coding.

RESULTS

Themes that emerged from the analysis included (1) youth valued rewards to incentivize the progressive reduction of cannabis use, which included both nontangible rewards that mimic those obtained on social media platforms and prosocial activity-related rewards, (2) having the ability to self-monitor progression, (3) peer social support, (4) privacy and confidentiality discrete logo and name and usernames within the app, and (5) individualizing frequency and content of notifications and reminders.

CONCLUSIONS

Integrating content, language, interfaces, delivery systems, and rewards with which adolescents who use cannabis are familiar, engage with on a day-to-day basis, and identify as relevant, may increase treatment engagement and retention for adolescents in substance use treatment. We may increase treatment effectiveness by adapting and individualizing current evidence-based interventions, so that they target the needs of adolescents and are more easily incorporated into their everyday routines.
A Design of Educational Game to Prevent Cyber-Bullying among Teenagers and An Analysis of Its Effect (Preprint)
Authors: Yoon Hyung
Published: February 2019

UNSTRUCTURED

This paper is a case study on the design of an educational game for the prevention of cyberbullying and an analysis of its educational effect. I selected a game titled “Angry Daddy,” which was developed based on the request of Korean government authority and analyzed the mode of development of the game and its educational effect. For this research, both qualitative and quantitative research methods were used. Moreover, advice regarding the game design was obtained from many experts belonging to various fields. Based on the analysis of the game design and its educational effect, it was confirmed that the following factors are important to design an educational game meant for the prevention of cyberbullying and to enhance its educational effect: First, cooperation between content experts and game development experts is essential to develop an educational game. Second, it should be verified whether the contents and the format of the game are appropriate by analyzing the play test results of the target audience. Third, it is essential to prepare a manual to guide teachers to apply the game to the field. Fourth, it was confirmed that educating students on sensitive topics like cyberbullying is very effective when educational games that make them feel and experience the outcomes of bullying are utilized. This research is expected to be helpful for future design of educational games and the research and development of the format of cyberbullying prevention education.
Pregnancy-Related Information Seeking and Sharing in the Social Media Era Among Expectant Mothers: Qualitative Study (Preprint)
Authors: Zhu Chengyan , Zeng Runxi , Zhang Wei , Evans Richard , He Rongrong
Published: February 2019

BACKGROUND

Social media has become the most popular communication tool used by Chinese citizens, including expectant mothers. An increasing number of women have adopted various forms of social media channels, such as interactive websites, instant messaging, and mobile apps, to solve problems and obtain answers to queries during pregnancy. Although the use of the internet by pregnant women has been studied extensively worldwide, limited research exists that explores the changing social media usage habits in China, where the 1 child policy ended in 2015.

OBJECTIVE

This study aimed to (1) present the status quo of pregnancy-related information seeking and sharing via social media among Chinese expectant mothers, (2) reveal the impact of social media usage, and (3) shed light on pregnancy-related health services delivered via social media channels.

METHODS

A qualitative approach was employed to examine social media usage and its consequences on pregnant women. A total of 20 women who had conceived and were at various stages of pregnancy were interviewed from July 20 to August 10, 2017. Thematic analysis was conducted on the collected data to identify patterns in usage.

RESULTS

Overall, 80% (16/20) of participants were aged in their 20s (mean 28.5 years [SD 4.3]). All had used social media for pregnancy-related purposes. For the seeking behavior, 18 codes were merged into 4 themes, namely, gravida, fetus, delivery, and the postpartum period; whereas for sharing behaviors, 10 codes were merged into 4 themes, namely, gravida, fetus, delivery, and caretaker. Lurking, small group sharing, bad news avoidance, and cross-checking were identified as the preferred patterns for using social media. Overall, 95% (19/20) of participants reported a positive mental impact from using social media during their pregnancy.

CONCLUSIONS

It is indisputable that social media has played an increasingly important role in supporting expectant mothers in China. The specific seeking and sharing patterns identified in this study indicate that the general quality of pregnancy-related information on social media, as well as Chinese culture toward pregnancy, is improving. The new themes that merge in pregnancy-related social media use represent a shift toward safe pregnancy and the promotion of a more enjoyable pregnancy. Future prenatal care should provide further information on services related to being comfortable during pregnancy and reducing the inequality of social media–based services caused by the digital divide.
The effect of silk concentration on the flexural strength of FRC as a Bone Graft
Authors: Moechtar Rifki , Sunarintyas Siti , Herliansyah Muhammad Kusumawan
Published: February 2019

Bone fractures are mostly caused by trauma and disease. In the therapeutic process of bone healing which often meets some constraints, bone graft is mainly used to ensure that the healing process takes place. A fiber reinforced composite (FRC) is a popular bone graft material that is made to resemble bone properties. FRC is normally comprised of polymer matrix, hydroxyapatite filler, and fiber. Hydroxyapatite is a bioactive material widely used as a bone graft. Silk fiber is known as a reliable material to increase mechanical strength of the FRC. On this basis, this study aims to determine the effect of silk fiber concentration on the flexural strength of FRC. Fiber reinforced composite made of Bis-GMA/TEGDMA/ UDMA resin (CharmFil®, DenKist, Korea), hydroxyapatite (Bioceramic Laboratory, DTMI UGM) and silk fiber (Perhutani, Pati) were divided into three groups. Each group contained different silk fiber concentrations which were 1%, 5% and 10%. The flexural strength test was performed with 3-point bending test according to ISO 10477. The result showed that FRC with silk fiber 1%, 5% and 10% respectively had flexural strength of 61.21 ± 8.43 MPa, 62.97 ± 3.92 MPa and 85.01 ± 7.71 MPa. The result of one way ANAVA analysis showed that mean of FRCs flexural strength were significantly different between one treatment group to another. Thus, it is conclusive that silk fiber has a significant effect on FRCs flexural strength. The addition of 10% concentration of silk fiber is proven to increase FRCs flexural strength.
University Students’ Perceptions of MALL in EFL Classes
Authors: Kwangsawad Thooptong
Published: February 2019

Mobile technologies are rapidly attracting new users, providing increasing capacity, and allowing more sophisticated use such as accessing the Internet for searching information, emailing and reading e-books. As the mobile technology has been more powerful and inclusive in people’s daily lives, the issue of mobile assisted language learning (MALL) has also been widely studied. Many researchers of MALL consider the emerging mobile technologies to have potential for the effective language learning. The majority of MALL activities appear to make use of mobile phones, and nowadays, smartphones replace feature phones. This study focuses on the investigation of students’ perceptions of the benefits and challenges associated with the use of smartphones for learning.
Cidade educadora: viver a urbe no ensino de geografia
Authors: Nedel Oliveira Victor Hugo
Published: February 2019

RESUMO Este artigo trabalha a Educação Geográfica a partir das saídas de estudos e suas potencialidades para o ensino de Geografia. A cidade, que surge como cenário para as saídas de campo, não se configura apenas como agente passivo neste contexto, mas como espaço que educa através de seus objetos e ações. Demonstra-se, a partir destes entendimentos, uma proposta de saída de estudos por dois espaços da cidade de Porto Alegre – RS: o Centro Histórico e o Cemitério da Santa Casa de Misericórdia. Os conceitos vivenciados neste trabalho de campo vão além das questões de Geografia urbana, uma vez que existem diversas possibilidades conceituais e analíticas a serem exploradas nos espaços visitados, como é demonstrado no decorrer do texto. Pensar o ensino de Geografia a partir de vivências urbanas coloca o estudante como sujeito social, inserido em um contexto real de uma cidade que pulsa, vibra e se movimenta.   Palavras-chave: Geografia. Cidade. Saída de campo. Educação.   ABSTRACT This following paper deals with Geographical Education through field trips and their potentialities in teaching Geography. The city, which emerges as a stage for field trips, is not only a passive agent in this context, but a space that educates through its objects and actions. It shows, from such understandings, a proposal of field trips to two places in the city of Porto Alegre - RS: the Historic District and the Cemetery of Santa Casa de Misericordia. The concepts experienced in this field trip go beyond the issues of urban geography, since there are various conceptual and analytical possibilities to be explored in the places visited, as demonstrated throughout the text. Considering teaching Geography from urban experiences place the student as a social subject, inserted in a real context of a city that pulsates, vibrates and moves. Keywords: Geography. City. Field Trip. Education. RESUMEN Este artículo trabaja la Educación Geográfica a partir de las salidas de estudios y sus potencialidades para la enseñanza de Geografía. La ciudad, que surge como escenario para las salidas de campo, no se configura sólo como agente pasivo en este contexto, sino como espacio que educa a través de sus objetos y acciones. Se demuestra, a partir de estos entendimientos, una propuesta de salida de estudios por dos espacios de la ciudad de Porto Alegre - RS: el Centro Histórico y el Cementerio de la Santa Casa de Misericordia. Los conceptos vivenciados en este trabajo de campo van más allá de las cuestiones de Geografía urbana, ya que existen diversas posibilidades conceptuales y analíticas a ser exploradas en los espacios visitados, como se demuestra en el transcurso del texto. Pensar la enseñanza de Geografía a partir de vivencias urbanas coloca al estudiante como sujeto social, inserto en un contexto real de una ciudad que pulsa, vibra y se mueve.   Palabras-clave: Geografía. Ciudad. Salida De Campo. Educación.  DOI: http://dx.doi.org/10.22169/revint.v13i29.1407
Arquiteturas Pedagógicas na formação de professores a distância
Authors: Aragón Rosane , Michels Ana Beatriz , Araújo Alexandre
Published: February 2019

Resumo Este artigo tem como finalidade analisar o processo de apropriação e utilização de arquiteturas pedagógicas num curso de Pedagogia, na modalidade a distância. Os dados empíricos desse estudo, composto por vinte e quatro artigos publicados em periódicos, eventos e capítulos de livros, foram analisados na perspectiva da análise de conteúdo. Os resultados mostram que os objetivos propostos no projeto pedagógico do curso foram colocados em prática na formação, bem como sugerem que as arquiteturas pedagógicas tiveram um papel importante no crescimento gradual do engajamento, da autonomia e da cooperação, sinalizando o alcance do objetivo de construção de redes de aprendizagem e de suporte a reconstrução de arquiteturas pedagógicas para utilização em suas salas de aula. Palavras-chave: Formação de Professores. Inovação Pedagógica. Tecnologias Digitais.       ABSTRACT The following paper analyzes the process of appropriation and usage of Pedagogical Architectures in a Pedagogy distance education program. The empirical data, consisting of twenty-four articles, published in periodicals, symposia and book chapters, were analyzed regarding their content.  The results show that the objectives proposed in the program pedagogical project were put into practice in the training. In addition, they suggest that pedagogical architectures played an important role in the gradual growth of engagement, autonomy and cooperation, substantiating the achievement of the goal of building learning networks and supporting the reconstruction of pedagogical architectures to be used in their classrooms.   Keywords: Teacher Training. Pedagogical Innovation. Digital Technologies.     RESUMEN Este artículo tiene como finalidad analizar el proceso de apropiación y utilización de arquitecturas pedagógicas en un curso de Pedagogía, en la modalidad a distancia. Los datos empíricos de este estudio, compuesto por veinticuatro artículos publicados en periódicos, eventos y capítulos de libros, fueron analizados en la perspectiva del análisis de contenido. Los resultados muestran que los objetivos propuestos en el proyecto pedagógico del curso se pusieron en práctica en la formación, así como sugieren que las arquitecturas pedagógicas desempeñaron un papel importante en el crecimiento gradual del compromiso, de la autonomía y de la cooperación, señalando el alcance del objetivo de construcción de redes de aprendizaje y de soporte a la reconstrucción de arquitecturas pedagógicas para su uso en sus aulas. Palabras clave: Formación de Profesores. Innovación Pedagógica. Tecnologías Digitales. DOI: http://dx.doi.org/10.22169/revint.v13i29.1435
Confrontando educação de jovens e adultos (EJA) com a educação à distância (EAD) na legislação brasileira
Authors: Wachowicz Lilian Anna Anna
Published: February 2019

Este texto homenageia a Professora Onilza Borges Martins.DOI: http://dx.doi.org/10.22169/revint.v13i29.1486
El concepto de fascismo y las dictaduras militares: Agustín Cueva y los debates de teoría política en los años setenta y ochenta
Authors: Tzeiman Andrés
Published: February 2019

El presente trabajo pretende llevar a cabo una recuperación del debate que se suscitara en la bisagra de los años setenta y ochenta en la intelectualidad crítica latinoamericana acerca de la conceptualización de las dictaduras militares que en ese entonces atravesaban la región. Con ese fin, el artículo parte de la figura del sociólogo ecuatoriano Agustín Cueva, quien no solo participó activamente de aquellas controversias, sino que también mantuvo intercambios con otros intelectuales latinoamericanos, especialmente en revistas o publicaciones que por esos años residían en la academia mexicana (como la Revista Mexicana de Sociología o Cuadernos políticos). Los debates en cuestión giran fundamentalmente en torno a la pertinencia teórico-política de la categoría de fascismo para caracterizar a las dictaduras autóctonas de aquella época, y aquí nos concentramos en las intervenciones de intelectuales como Atilio Boron, René Zavaleta y Ruy Mauro Marini.
Análise Comparativa da Inserção Brasileira e Mexicana na América Latina (2000-2015)
Authors: Walid de Magalhães Naddi Beatriz
Published: February 2019

Brasil e México são as duas maiores economias latino-americanas e, além disso, possuem vantagens geográficas óbvias: o Brasil por seu vasto território e o México por sua posição geoestratégica entre América do Norte e América Latina. Por este motivo, ambos exercem uma importante influência na região. Com base nisso, este artigo tem como propósito analisar a inserção de Brasil e México na América Latina entre 2000 e 2015. Para isso, é utilizada análise sistêmica, dividindo a inserção desses países entre posturas semelhantes e divergentes. Ao final, considera-se que fatores como o histórico da relação com a região, a dialética dos interesses nacionais e internacionais, a estratégia de desenvolvimento adotada, sua localização geográfica, a relação estabelecida com os EUA e o contexto regional são preponderantes para as aproximações e distanciamentos das estratégias de inserção de Brasil e México.
ANALISIS PENYELESAIAN MASALAH MATEMATIKA PADA PEMBELAJARAN YANG MENGGUNAKAN PENDEKATAN SAINTIFIK DI KELAS VII
Authors: Hakim Arief Rahman
Published: February 2019

This research aims to knowing the students when solving mathematical problemsin learning used scientific approach in class VII C SMPN 11 Malang. This type of research is descriptive qualitative approach. This research was conducted in SMPN 11 Malang on 7, 11, and August 14, 2015. Object of this study is the activity of students in solving mathematical problems. The subjects were students of class VII C SMPN 11 Malang. Methods of data collection in this study of student observation sheet, interview, and documentation.The results showed that : Activity of students when solving mathematical problems in learning used scientific approach has been implemented properly in accordance syntax that has been planned although the results are still not optimal. The results of observations at the first meeting showed that there were 36 students who observed the problem, three students were asked 27 students to reason, 23 students tried to solve it, two students presenting answers. The second meeting of the study there were 36 students observe the problem, two students asked 33 students to reason, 29 students tried, 4 students present.The third meeting there were 36 students observe, 4 students asked, 32 reasoning, 28 tries,and no students were present.
AN ANALYSIS OF MATHEMATICAL’S WRITING OF STUDENT’S ABILITY ON THE CLASS VIII
Authors: Syarifah Dita Latifatu , Taufik Marhan , Cholily Yus Mochamad
Published: February 2019

The research has a goal to describe writing mathematical student capabilitybased on mathematics expression aspect and writing text aspect on thesystem equation linear two variable lesson.The research is using qualitativeapproach which creature of descriptive. The collecting technique of datawhich done is about the result of answering test. The result’s analysis ofthe research student capability on writing mathematical expression andwriting text which be on the system equation linear two variable matter isabout the student can writing mathematics model which suitable with thematter has given, but did not write the formula completely. The result’sanalysis of test on the writing text aspect, student can write the symbolexactly but there is notconsistently and less coherent on writing steps. Ashortage of mathematics expression and writing text because of student lesson understanding what it asked on the matter. The abilities’ result of studentsmathematics written based on expression mathematics on the highcathegories and get average about 67,54%, while getting result of writingtext on the middle cathegories as about 60,52%.
ANALYSIS OF CRITICAL THINKING SKILLS BY HOMESCHOOLING’S STUDENTS IN SOLVING MATHEMATICAL PROBLEM
Authors: Sholihah Fitriatus , Inganah Siti , Effendi Moh. Mahfud
Published: February 2019

This study aims to describe the critical thinking skills ofhomeschooling students in solving mathematical problems. The type ofthis research is descriptive research with qualitative approach. Subjects inthis study were six students homeschooling is equivalent to junior highschool students class IX. Data were obtained through tests and interviews.Test are identified and described in accordance with the achievement ofstudents towards critical thinking indicators used in this research thatclarification, assessment, strategy/ tactics, and inference. The results of theinterviews are used to further strengthen the data on homeschoolingstudents' critical thinking skills. The results showed that onehomeschooling student is in the category of less critical, four students areon quite critical category and only one student in a critical category.This suggests that homeschooling students' critical thinking skills arelow. Low critical thinking skills are affected by limitations homeschoolingstudent learning of mathematics is done, students 'mathematical ability andmathematical learning processes that do not yet geared to developinghomeschooling students' critical thinking skills. So that based on the resultsof this study are advised to make the learning process of mathematics todevelop homeschooling students' critical thinking skills.
Description of Difficulties in Implementing The Assessment of Performance Aspects for Understanding Mathemathic Teachers at MTs Al Mustaqim Parepare
Authors: Sari Vernita
Published: February 2019

Performance assessment needs to understand and implement by teachers sothat the teachers can assess the skills aspects of their studentswell. However, some teachers have difficulties in implementingperformance assessment includes mathematic teachers at MTs Al MustaqimParepare. The purpose of this research is to describe the difficulties ofimplementing performance assessment on understanding aspects ofmathematic teachers at MTs Al Mustaqim Parepare. This research wasqualitative research. The subjects of the study were two mathematic teachersof MTs Al-Mustaqim Parepare here in after called subject 1 (H) and subject2 (N). The focus of the research is to describe the difficulties teachers usingthe performance assessment on aspects of teachers' understanding ofmathematic. For revealing the research data, this conducts tests andinterviews to the subject of research. The data of research is validated bydoing triangulation method. The Research of data is analyzed by (a)studying the subject data and comparing data to obtain for valid data, (b)reducing data by creating abstractions, (c) classifying and identifying thedata to draw conclusions from the data. The result research shows thatthe difficulties for teachers, it is for understanding aspect about theassessment performance. For instance, (a) the subject 1 (H) was difficult inunderstanding about the concept of assessment, (b) the subject 1 (H) wasdifficult in understanding the assessment techniques so that it can beimplemented, (c) subject 1 (H) was difficult in understanding the types ofassessment rubrics, and (d) subject 2 (N) was difficult in understanding theconcept of assessment.
Memorizing Qur’an and Mathematics Achievement
Authors: Faiziyah Nuqthy
Published: February 2019

The aim of this research is to know the correlation between memorizingQur‘an and mathematics learning achievement. It is a quantitative researchusing linear regression. The sample was taken by purpose sampling technicand an elementary school in Sragen was chosen. The data source was adocument of the mathematics subject mark and the number surahmemorized. The result shows that there is a correlation between memorizingQur‘an and mathematics learning achievement. The regression linear modelwas able to be built. The coefficient of regression is 1.024. This shows thatmemorizing one surah of Qur‘an more would make the mathematicslearning achievement increases at 1.024 point. The coefficient ofdetermination is 0.365. The conclusion is that memorizing Qur‘an hascontribution to mathematics learning achievement This electronic documentis a ―live‖ template and already defines the components of your paper [title,text, heads, etc.] in its style sheet.
The Influence of the SAVI Approach and Learning Styles on Student’s Creative Math Skills
Authors: Fionika BT Yosi Olda , Kamid Kamid , Anggereini Evita
Published: February 2019

Learning technique at school should concentrate on developing studentscreativity. Creative thinking ability will be the determinant of individualsuccess. But in fact, students are familiar with routine and simple learning.The SAVI approach is an approach that combines physical movement withintellectual activity. Learning style is the capital of a student to absorbinformation. The method used in this research is quantitative method, whichis the purpose is to know the influence of SAVI approach and learning styleto students' creative thinking ability in mathematics when compared withdirect learning. The instruments used are tests of creative thinking abilitiesand learning styles of students. The result of data analysis using statistical testthat is (1) there is influence of SAVI approach and learning style to studentcreative thinking ability. (2) there is influence of SAVI approach to SAVIcreative thinking ability. (3) there is influence of student learning style tostudent creative thinking ability. (4) there is an interaction between SAVIapproach and learning style to students' creative thinking ability.
The Influence Of Intensity And Habits Learning On Mathematical Critical Thinking Ability
Authors: Purwaningsih Dian
Published: February 2019

The problems often faced by students in the learning process are theability to solve mathematical problems. The process of solvingmathematical problems requires thinking skills. Thinking skills needed toprovide creative ideas in solving mathematical problems include criticalthinking skills. The understanding of students in providing creative ideas isstill low and the ability of students to identify a mathematical problem isstill low. The purpose of this study was to determine the effect of learningintensity on the ability to think critically mathematically, to determine theeffect of learning habits on mathematical critical thinking skills, todetermine the effect of learning intensity and learning habits onmathematical critical thinking skills. This type of research is explanatoryresearch. The results of this study, namely there is a positive influence onlearning intensity on mathematical critical thinking skills, there is a positiveinfluence on learning habits on mathematical critical thinking skills, there isa positive influence on intensity and learning habits on mathematical criticalthinking skills.
Sobre a (im)possibilidade de dar voz aos usuários das políticas públicas: reflexões a partir da prática intersetorial
Authors: Romagnoli Roberta Carvalho
Published: February 2019

Esse artigo coloca em análise as relações da prática intersetorial com as famílias no Núcleo Intersetorial Regional Técnico (NIR-T) de uma das regionais de Belo Horizonte, espaço para a discussão de casos graves de violação social. Esse estudo tem a pesquisa-intervenção como metodologia e as ideias de Deleuze e Guattari e René Lourau como marco teórico. No processo da pesquisa tivemos dificuldades com as entrevistas com as famílias, que não puderam ser escutadas como planejado. Examinamos essa inviabilidade como um analisador, que torna visível a tensão do que é reproduzido pelas instituições, mas também a produção do novo, do que gera conflito. Constatamos a presença de alguns “não ditos” institucionais: a mudança de prefeito, a proteção dos profissionais e das famílias, a passividade, mas também a necessidade de sustentar a diferença das famílias. Concluímos que a avaliação das políticas públicas pelos usuários é essencial para a sustentação da prática intersetorial.
COMPREENSÃO TEXTUAL E DEFICIÊNCIA VISUAL: UM OLHAR PARA O ENSINO DE LEITURA EM LÍNGUA INGLESA A PARTIR DE UMA PERSPECTIVA INCLUSIVA
Authors: Marinho José Eric Da Paixão , Maia Angélica Araújo de Melo
Published: February 2019

Com os avanços da legislação e das práticas pedagógicas que ocorreram nas últimas décadas, fica evidente que a temática da educação inclusiva tem chamado a atenção de muitos professores e pesquisadores. Partindo do ensino de língua inglesa, que é o foco desse artigo, observa-se que todos os alunos, com ou sem deficiência, utilizam-se de uma série de estratégias durante o processo de ensino a qual se submetem. Desta maneira, levando em consideração as estratégias de aprendizagem (MALTA, 2009; OXFORD, 2003) mobilizadas pelos/para alunos com deficiência visual, investigamos como ocorre o desenvolvimento da capacidade de compreensão textual, em língua inglesa, por parte desses alunos em contexto de instituição especializada. Buscando mapear essas estratégias, foram analisadas as respostas dadas por três alunos da turma pesquisada a um questionário, produzido pelo pesquisador, a respeito de aspectos relativos às aulas a seus cotidianos, a fim de entender que elementos eles consideram mais favoráveis ao desenvolvimento de sua capacidade de compreensão textual em língua estrangeira. A geração dos dados ocorreu no Instituto dos Cegos da Paraíba Adalgisa Cunha, instituição especializada no atendimento de pessoas com deficiência visual, localizada na cidade de João Pessoa – PB. Os resultados alcançados através da análise do questionário apontam que a estratégia de aprendizagem mais utilizada pelos participantes da pesquisa durante o processo de compreensão textual é a compensatória, através da qual esses alunos buscam superar suas dificuldades.