bluuebunny/crossref_metadata_2025 huggingface dataset:
The Interplay among Molecular Structures, Crystal Symmetries and Lattice Energy Landscapes Revealed by Unsupervised Machine Learning: A Closer Look at Pyrrole Azaphenacenes
Authors: Yang Jack , Li Nathan , Li Sean
Published: July 2019

The ability to perform large-scale crystal structure predictions (CSP) have significantly advanced the synthesis of functional molecular solids by designs. In our recent work [Chem. Mater., 30, 4361 (2018)], we demonstrated our latest developments in organic CSPs by screening a set of 28 pyrrole azaphenacene isomers which led to one new molecule with higher thermodynamic stability and carrier mobilities in its crystalline form, compared to the one reported experimentally. Hereby, using the lattice energy landscapes for pyrrole azaphenacenes as examples, we applied machine-learning techniques to statistically reveal in more details, on how molecular symmetry and Z' values translate to the crystal packing landscapes, which in terms affect the coverage of landscape through quasi-random crystal structure samplings. A recurring theme in crystal engineering is to identify the probabilities of targeting isostructures to a specific reference crystal upon chemical functionalisations. For this, we propose here a global similarity index in conjunction with the Energy-Density Isostructurality (EDI) map to analyse the lattice energy landscapes for halogen substituted pyrrole azaphenacenes. A continue effort in the field is to accelerate CSPs for sampling a much wider chemical space for high-throughput material screenings, we propose a potential solution to this challenge drawn upon this study. Our work will hopefully stimulate the crystal engineering community in adapting a more statistically-oriented approach in understanding crystal packing of organic molecules in the age of digitisation.
Solubility of Polar and Non-Polar Aromatic Molecules in Subcritical Water: The Role of the Dielectric Constant
Authors: Galamba Nuno , Paiva Alexandre , Barreiros Susana , Simões Pedro
Published: July 2019

Liquid water at temperatures above the boiling point and high pressures, also known as pressurized hot water, or subcritical water (SBCW), is an effective solvent for both polar and non-polar organic solutes. This is often associated to the decrease of water's dielectric constant at high temperatures, apparently allowing water to behave like an organic solvent. The decrease of the solubility at high pressures, in turn, is explained by a mild increase of the dielectric constant of water. Nevertheless, the relationship between the dielectric constant of water, hydration, and the solubility of polar and non-polar molecules in SBCW, remains poorly understood. Here, we study through molecular dynamics, the hydration thermodynamic parameters and the solubility of non-polar and polar aromatic model systems, for which a solubility increase in SBCW is observed. We show that the temperature dependence of the hydration free energy of the model non-polar solutes is nonmonotonic, exhibiting a solute size independent maximum at ~475 K, above which hydration becomes entropically favorable and enthalpically unfavorable. The monotonic increase of the solubility, separated here in hydration and vaporization or sublimation components of the pure liquid or solid solute, respectively, is, in turn, related to the temperature increase of the latter, and only to a minor extent with the decrease of the hydration free energy above ~475 K, via the hydration entropy. A solubility increase or decrease is also found at high pressures for different solutes, explained by the relative magnitude of the hydration and the vaporization or sublimation components of the solubility. For the model solid polar system studied, the hydration free energy increases monotonically with the temperature, instead, and the solubility increase is caused by the decrease of the sublimation component of the solubility. Thus, despite of the observed increase of the hydration free energy with pressure, related to the entropic component decrease, our results indicate that the dielectric constant plays no significant role on the solubility increase of non-polar and polar solutes in SBCW, opposite to the dielectric constant picture. The structure of water next to the solutes is also investigated and a structural enhancement at room temperature is observed, resulting in significantly stronger pair interactions between a water molecule and its third and fourth nearest water neighbors. This structural and energetic enhancement nearly vanishes, however, at high temperatures, contributing to a positive hydration entropy.
Low Concentration Measurements of Nuclear Spin-Induced Optical Rotation Using SABRE Hyperpolarization
Authors: Štěpánek Petr , Kantola Anu M.
Published: July 2019

Nuclear spin-induced optical rotation (NSOR) is a promising phenomenon for molecular structure elucidation due to its sensitivity to electronic structure near atomic nuclei. It is the only experimentally verified nuclear magneto-optic effect, so far observed usually in neat liquids or in concentrated binary mixtures, with the proportion of the minor component at least 10\%. We report a method to extend the lower concentration range of NSOR measurements by two orders of magnitude by employing continuous-flow SABRE (signal amplification by reversible exchange) hyperpolarization. This approach significantly increases sensitivity of NSOR and enables its detection in dilute samples, as demonstrated with measurements of NSOR of 90 mmol/l solutions of pyridine and pyrazine. The results are compared with first principles calculations and a good agreement is found. The possibility to measure low concentration solutions significantly extends the pool of samples available for further studies of nuclear magneto-optic effects.
A Heterogeneous CPU + GPU Algorithm for Variational Two-Electron Reduced-Density Matrix Driven Complete Active Space Self-Consistent Field Theory
Authors: Mullinax J. Wayne , Maradzike Elvis , Koulias Lauren N. , Mostafanejad Mohammad , Epifanovsky Evgeny , Gidofalvi Gergely , DePrince Eugene
Published: July 2019

We present a heterogeneous CPU+GPU algorithm for the direct variational optimization of the two-electron reduced-density matrix (2RDM) under two-particle N-representability conditions. This variational 2RDM (v2RDM) approach is the driver for a polynomially-scaling approximation to configuration-interaction-driven complete active space self-consistent field (CASSCF) theory. For v2RDM-based CASSCF com- putations involving an active space consisting of 50 electrons in 50 orbitals [denoted (50e,50o)], we observe a speedup of a factor of 3.7 when the code is executed on a combination of an NVIDIA TITAN V GPU and an Intel Core i7-6850k CPU, relative to the case when the code is executed on the CPU alone. We use this GPU-accelerated v2RDM-CASSCF algorithm to explore the electronic structure of the 3,k-circumacene and 3,k-periacene series (k=2–7) and compare indicators of polyradical character in the lowest-energy singlet states to those observed for oligoacene molecules. The singlet states in larger circumacene and periacene molecules display the same polyradical characteristics observed in oligoacenes, with the onset of this behavior occuring at smallest k for periacenes, followed by the circumacenes and then the oligoacenes. However, the unpaired electron density that accumulates along the zig-zag edge of the circumacenes is slightly less than that which accumulates in the oligoacenes, while periacenes clearly exhibit the greatest build-up of unpaired electron density in this region.
Highly Porous Hybrid Metallosilicate Materials Prepared by Non-Hydrolytic Sol-Gel: Hydrothermal Stability and Catalytic Properties in Ethanol Dehydration
Authors: Styskalik Ales , Kordoghli Imene , Poleunis Claude , Delcorte Arnaud , Aprile Carmela , Fusaro Luca , Debecker Damien
Published: July 2019

Herein, we present novel phenylene- and xylylene-bridged silica and metallosilicate materials prepared by non-hydrolytic sol-gel. The hybrid silica are highly porous, chemically similar to periodic mesoporous organosilica (PMO), but amorphous. Analogous hybrid metallosilicates are obtained by directly incorporating Al, Nb, or Sn in the hybrid silica framework. Exhibiting open texture, surface acidity and tunable hydrophobicity, these materials are excellent candidates for catalytic alcohol dehydration reactions. The gas-phase hydrothermal and thermal stability of these materials is examined. While the hybrid silica is expectedly stable, a stark decrease in stability is observed for phenylene bridged silsesquioxanes upon metal introduction. The extent of the hydrolytic Si−C(sp2) bond cleavage is quantitatively followed by 29Si MAS NMR, TG analysis, and GC-FID analysis of effluent coming from samples exposed to water vapor. Two important features affecting the hydrothermal and thermal stability are identified: (i) the homogeneity of metal dispersion within the silica matrix, and (ii) the electronegativity of the incorporated metal. The stability of hybrid metallosilicates is significantly improved by replacing the phenylene bridges with xylylene bridges, due to the presence of more stable Si−C(sp3) bonds. Interestingly, the latter hybrid metallosilicate proves to be an active catalyst for the dehydration of ethanol to ethylene. Unlike the other hybrid materials presented here, it reaches high ethylene yields without undergoing degradation and deactivation.
Interleukin-6 gene polymorphism (-174 G/C) association with seropositive Toxoplasma gondii infection patients in Al-Diwaniyah hospital
Authors: Fatima Ibrahim Mohammad  , Mustafa Ali Abdul Ameer
Published: July 2019

The present study aims to detection Interleukin-6 gene polymorphism (-174 G/C) from seropositive Toxoplasma gondii pregnant women patients and healthy control from individuals reviewers to AL-Diwaniyah hospital. 80 samples were collected for the period from October 2018- April 2019, including two groups of 30 samples healthy control and 50 samples from pregnant women infected with Toxoplasma gondii. The results of the present study indicated the presence of IL-6 (-174 G/C) polymorphism in pregnant women infected with Toxoplasma gondii and healthy control. Where was observed that CG genotype more frequent in patients indicating the association of this genotype with the disease compared to the control group where CG genotype appears less. Also, the results of the current study indicate the appearance of allele C more frequently in pregnant women patients compared to healthy control. We can conclude from the present study there association of appearance allele C with Toxoplasma gondii infection.
Identidades migrantes, fronteira e cidadania.
Authors: Alvarez Gabriel O
Published: July 2019

O trabalho se apóia numa pesquisa de campo extensiva que visitou 14 cidades localizadas nas fronteiras do Brasil com os países do Mercosul. Ao longo do trabalho se analisa os diferentes tipos de migrantes e a dinâmica das identidades, (estigmatizadas, mimetizadas ou invocadas). A pesquisa abordou diferentes tipos de migrantes: os estrangeiros, os que realizam migração pendular e aqueles migrantes de retorno. A fronteira como locus de pesquisa permite também analisar diferentes dimensões analíticas: internacional, transnacional, translocal e regional. O trabalho analisa também as percepções e expectativas destes trabalhadores migrantes sobre o processo de integração regional do Mercosul
Os Guarani na fronteira do Brasil, Paraguay e Argentina: Uma viagem de intercâmbio Guarani
Authors: Brand Antonio , Colman Rosa Sebastiana
Published: July 2019

O presente artigo é resultado da participação em viagem de intercâmbio entre os Guarani Mbya, Ñandeva e Kaiowá/Paĩ, do Paraguay, Brasil e Argentina, realizada entre os dias 30 de Março e 06 de Abril de 2009, com a participação de 13 representantes indígenas dos três países. O objetivo desse intercâmbio era, além deconhecer a realidade vivenciada nos três países, fortalecer as articulações entre os Guarani. A iniciativa está inserida num projeto voltado para o “Apoio ao Fortalecimento das Políticas Públicas entre os Índios Guarani na Região Transfronteiriça: Brasil, Paraguai e Argentina”, desenvolvido por diversas Universidades do Brasil, Paraguai eArgentina, com apoio do Ministério Público Federal e recursos da agência espanhola decooperação (AECID). As visitas foram documentadas por escrito e filmadas porrepresentantes guarani. Algumas observações conclusivas podem ser destacadas. Aconstatação de problemas comuns relacionados à posse dos territórios guarani nos trêspaíses, o comprometimento dos recursos naturais em toda a extensão do território e, emespecial, a crescente interferência das fronteiras nacionais sobrepondo-se e remodelandoas fronteiras indígenas, apesar da persistência da mobilidade transfronteiriça dosGuarani.
Cosmopolítica constituinte da complexidade na Bolívia: A Constituição “aberta” e o surgimento do Estado Plurinacional
Authors: Schavelzon Salvador
Published: July 2019

A partir do estudo etnográfico da elaboração de uma nova Constituição na Bolívia (2006 a 2009), este artigo busca mapear o debate sobre a emergência do Estado Plurinacional e descrever o modo segundo qual "camponeses indígenas" e seus aliados redigiram a Constituição, combinando um projeto estatal de soberania e inclusão com um projeto pluralista em favor de autonomias. Paralelamente a uma reflexão epistemológica sobre a complexidade, examinamos também as contestações levantadas contra um projeto de texto constitucional que incluiu a comunidade e o objetivo de descolonizar a Bolívia a partir de formas abertas e ambíguas de redação, que consideramos como uso estratégico e "selvagem" da lei estatal.
Reversible data hiding method by extending reduced difference expansion
Authors: Syahlan Zainal , Ahmad Tohari
Published: July 2019

To keep hiding secret data in multimedia files, such as video, audio, and image considers essential for information security. Image, for instance, as the media aids data insertion securely. The use of insertion technique must ensure a reliable process on retaining data quality and capacity. However, a trade-off between the resulted image quality and the embedded payload capacity after the embedding process often occurs. Therefore, this research aims at extending the existing method of integrating confidential messages using the Reduced Difference Expansion (RDE), transform into a medical image by changing the base point, block size, and recalculating of difference. The results display that the proposed method enhances the quality of the stego image and capacity of the hidden message.
Miedo y sentido de pertenencia del territorio del estado-nación colombiano
Authors: Rojas Rojas Carlos Eduardo
Published: July 2019

Este escrito se ocupa del miedo y el sentido de pertenencia del territorio del Estado-nación colombiano y es uno de los productos de una investigación[1] que se realizó con base en el modelo conceptual nombrado Emoterras, cuyos rasgos generales se presentan en la introducción. Inicialmente, se exponen los hallazgos a partir de una de las objetivaciones del miedo: el Palacio de Justicia localizado en la Plaza de Bolívar de Bogotá. Luego se abordan el gobierno desde el miedo a la democracia y al pueblo; y los miedos de los sectores subalternos y la defensa de sus derechos. Adicionalmente, se presenta un apartado titulado del miedo al terror: violencia política y acciones de las víctimas, y se finaliza con el paso del miedo a la subjetivación de la esperanza; para concluir que el miedo ha obstaculizado la formación del sentimiento de pertenencia de los territorios del Estado-nación colombiano.
Procesos de subjetivación política en el ciclo electoral de los movimientos populares en Argentina
Authors: Palumbo María Mercedes
Published: July 2019

Este artículo analiza los procesos de subjetivación política de militantes de base pertenecientes a movimientos populares de la izquierda independiente en la Argentina en el marco de las reconfiguraciones comportadas por el denominado ciclo electoral. Se llevó adelante una estrategia metodológica cualitativa que supuso una triangulación de técnicas. Los hallazgos muestran que la teoría política nativa articulada en torno a las categorías “la política de ellos” y “nuestra política” se reconfigura a medida que los movimientos populares despliegan tácticas en las cuales “nuestra política” juega en el campo de “la política de ellos”. Esta recolocación de los movimientos en relación al Estado y a las elecciones conlleva a mutaciones en los procesos de subjetivación política de los militantes de base en términos de su definición de sí como militantes y de sus prácticas
eficiencia (tarifas) y la equidad (subsidios) en la prestación del servicio público domiciliario de agua potable en la ciudad de Bucaramanga, (2004-2018)
Authors: Silva Ruiz Jose
Published: July 2019

El sistema tarifario del servicio de acueducto en Colombia está constituido por el cargo fijo (cuota fija CMA/suscriptores) y el cargo por consumo (CMLP), a su vez referentes para determinar las tarifas del estrato 4 y para establecer los subsidios (estratos 1, 2 y 3) y los sobre precios o subsidios cruzados a los estratos 5 y 6 así como a los sectores de la industria y del comercio; lo anterior, sumado a los bloques de consumo, se constituye en la base de la factura de acueducto por usuario según estrato y sector. En el Acueducto Metropolitano de Bucaramanga S.A.E.S.P., AMB el valor de las tarifas del consumo básico (a precios corrientes), estuvieron cerca de cuadruplicarse entre los años 2004 y 2018 para algunos estratos y sectores; además, se triplicaron para el caso del consumo complementario durante ese mismo periodo de tiempo. El alto valor de las tarifas ha llevado a los usuarios de los estratos 4 y 5 a restringir el consumo de agua a niveles por debajo de los 14m3 mensuales, al pasar de 19,41 m3 de consumo mensual en el año 2015 a 14,2 en el año 2017. El total de suscriptores residenciales aumentó en 90.959 entre los años 2000 y 2017, y en 10.035 para los no residenciales. El aumento total de suscriptores entre los años 2000 y 20017 fue de 102.182; esto evidencia la expansión de la ciudad de Bucaramanga.
Violence, post-conflict and electoral trends in Colombia: notes for reflection
Authors: Ríos Jerónimo , Morales Correa Jennifer
Published: July 2019

El trabajo que se presenta a continuación, en un ejercicio descriptivo, sugiere una cierta relación espacial entre los lugares de Colombia que durante años presentaron mayores niveles de vulnerabilidad territorial, en términos derivados del conflicto armado interno y violencia estructural, con respecto a la posición predominante tanto a tenor del plebiscito con las FARC-EP, como con las elecciones presidenciales de la segunda vuelta, acontecidas en 2018. Con una alta proximidad al campo de estudio que representa la geografía electoral, se proponen reflexiones que sugerirían indagar en un posible voting for peace en Colombia, especialmente perceptible en la periferia territorial del país, en donde el apoyo a Gustavo Petro y el respaldo al Acuerdo de Paz suscrito con la guerrilla de las FARC-EP encuentra mayores adeptos.
Screen time activity and its impact to sleep duration of school-aged
Authors: Amelia Vivi Leona , Ramdani Meida Laely
Published: July 2019

Background: Nowadays, massive development of technology impacts to human of all ages. One of the impacts to children is the increase of screen time activity duration. The activity correlates to children’s sleep quality, it reduces their sleep duration.Objective: this study aims to identify factors of screen time activities and its different impact to boys and girls with age range 9-11 years old.Methods: This study uses an observational analytic study design with a cross-sectional approach. The respondents are school-aged children aged 9-11 years old with a total of 368 respondents.Results: This study find that children have sleeping average duration 8.704 (SD ± 1.36) h/day, and 63.9% of the children is reported to get sleep insufficiency. The screen time factor relates to sleep insufficiency of boys who spend more than 2 hours for screen time (p=0.000) and got difficulty to sleep (p=0.006). While the girls spend 2 hours or more for watching TV (p=0.013) and have difficulty of sleep (p=0.000).Conclusion: School-aged children who have sleep insufficiency are associated with bad media habits, in a form of excessive screen time activity. It is a challenge for the parents, children, and nurses to be aware of good media habit importance.
Cognitive Structures and Misconceptions with a Thematic Framework: The Case of Chemical Bonding
Authors: ŞEN Şenol , VAROĞLU Lütfiye , YILMAZ Ayhan
Published: July 2019

This study aims to investigate undergraduate
students’ cognitive structures and determinate misconceptions about chemical
bonding phenomena. On the other hand, the study achieves to recommend an
alternative technique for the evaluation of Word Associations Tests (WAT). The
study was carried out with the participation of first year studens; 141 from
engineering faculty and 73 from medical sciences faculty of a foundation
university in the spring semester of 2017-2018 academic year. WAT about
chemical bonds prepared by the researchers was used as a data collection tool.
Content analysis were used to analyze the data. The students’ responds to the
key words given to them were divided into themes and cut-off technique was used
according to the themes distinguished. In this context, students' cognitive
structures related to chemical bonds were determined within the framework of
themes. It has been determined that the students’ WAT results regarding to
chemical bonding, which supported with concept maps within the framework of the
themes, provides convenience in determining the misconceptions because of
reflects the concepts and the relationships between the concepts more clearly.
In consequence, it is suggested that the new technique of evaluation
recommended could be used in prospective studies.
Examining Preservice Teachers’ Questioning and Feedback
Authors: BAYRAKTAR Ayşegül , YALÇIN Seher
Published: July 2019

This study examined the questioning styles of
preservice teachers along with the frequency and types of feedback provided
according to students’ responses. This was a pre-experimental design study with
a one-group pre-post-test design. The questioning ways of 13 preservice
teachers who taught in two public primary schools in Ankara, Turkey was investigated.
The study data were obtained by the video recording of 26 hours of classroom
instruction. Moreover, chi-square analysis was conducted to determine
relationships between wait time, cognitive level and type of question.
According to the results, it was determined that preservice teachers, both
before and after training, preferred to use redirecting questions more
frequently than creating new questions. It was also observed that preservice teachers
frequently asked questions which measured lower level cognitive competencies
and that there was an increase for all types of response feedback following the
training. However, there was no relationship found between the types of
feedback provided and the cognitive levels of the questions asked. The possible
reasons for these results might be over-crowded classrooms, focusing on grammar
instruction more than reading and writing, and/or inexperience among the
preservice teachers to deliver lessons that include high quality questioning
and effective feedback.
Active Learning Methods and Techniques Preferred by Teacher Candidates
Authors: ERDEM Aliye , KOÇ Emine Seda
Published: July 2019

The aim of this study is to determine the
active learning methods and techniques that teacher candidates prefer. The
study was conducted in accordance with scanning method. The participants of the
study were consisted of teacher candidates (n=266) who were received
pedagogical formation education in Kastamonu University at 2017-2018 spring
term. All of the participants had taken the lessons of “Teaching Principles and
Methods” and “Special Teaching Methods”. The survey form developed by the
researchers was used as data collection tool in the study. The survey form was
formed as ranking scale by consulting the field specialists’ opinions.
Accordingly, to state the active learning methods and techniques preferred by teacher
candidates 5 Likert-type items, from always to never, were used in the scale.
According to the pre-implementation results the Cronbach’s alpha value of the
form was calculated .86 and after the revision of the scale, final form was
consisted of 25 items. Percentage, frequency and descriptive analysis were used
for the analysis of the data obtained from teacher candidates’ opinions.
According to the findings of the study, it was concluded that question-answer,
brainstorming and problem-solving were the most preferred active learning
methods and techniques while gossip, court and buzz were the least preferred
ones.
PEMBERDAYAAN PEREMPUAN MARGINAL MELALUI PROGRAM PENDIDIKAN KECAKAPAN HIDUP-PEREMPUAN (PKH-P)
Authors: Suhardi A.
Published: July 2019

This paper describes the empowerment of marginal women through women's life skill education program. Lack of access to education, economy, employment, public policy, basic rights, gender equality, politics, and health are the causes of women getting marginalized. Empowering women through life skills education are an effort to empower women through various activities. The result of program “PKH-P (Pendidikan Kecakapan Hidup-Perempuan” is behavior change, that is the increasing of knowledge, skill, and attitude of self. So that marginal women can help themselves to be more empowered and out of the condition of their marginality towards the quality of life and higher level of living welfare.
PERAN WANITA DALAM PENDIDIKAN ANAK PERSPEKTIF ISLAM
Authors: Nurlina Nurlina
Published: July 2019

This paper examines the role of women in the education of children in the Islamic perspective that the role of women against children is very large in the formation of future generations. Given the magnitude of opportunities and opportunities of women as a mother role in initiating the process of education of children from an early age. The potential and ability of Muslim women is very influential to shape the colors and patterns of future generations of Muslims. Therefore, as a woman is expected to have a love that manifestly manifests in the way of raising, hugging, meet needs and make friends with children. Therefore women should seek to be a smart woman as a provision to educate their children, because a smart mother will give birth to intelligent children. Creating a great generation there are points that need to be a record for a woman to be played to her child that is aqidah, morals and prayers. Then the intelligence, tenacity, and the mother's temperament is the dominant factor for the child's future. That is the word of the wise man of old, If there are men who become scholars, scholar, prominent figures or warrior heroes, See who their mother is. Because Mother has a big role in shaping one's character and knowledge. Therefore, the mother is the center of children's education.
DUNIA PENUH DENGAN TIPUAN (Telaah atas Konsep al-Gurur dalam al-Qur’an)
Authors: Kallang Abdul
Published: July 2019

This paper examines the world is full of trickery review of the concept of al-Gurur in the Qur'an. This paper discusses the tendency of most people to be deceived by the life of almost instantaneous. Religion is a system of values that are recognized and believed to be true because the road to survival. Disbelievers are those who do not follow the rules of the truth that has been determined in religion, so that al-Gurur is a challenge for people who embrace the challenge for those who follow the formula of truth, the challenge for those who are obedient and faithful to the rule safety. Al-Gurur are thorns that are destroying the human life.  Religion as divine rules that can control the people who have common sense voluntarily to the good fortune of living in the world and in the hereafter. Therefore Al-Gurur is a mental illness that is misleading because of a trick of the devil. trap someone in the destruction and devastation of their own desires.
A organização do streaming no Brasil: Telmex, Globo e a associação entre telecomunicações e audiovisual
Authors: Martins Ladeira Joao
Published: July 2019

O artigo investiga a estruturação do streaming no

Brasil, analisando as interações entre dois dos

principais agentes neste processo: Telmex e Globo.

Analisa-se uma dimensão particular da renovação

do audiovisual, com atenção à sua progressiva

associação com tecnologias da informação. A

institucionalização desta forma de acesso a conteúdo

implica o uso de software, técnica para difundir

material através de dispositivos dos mais diversos.

Com ênfase na arqueologia da mídia, observa-se esta

transição como parte de um cenário mais amplo. Na

expectativa de compreender a lógica de definição

deste objeto, relaciona-se este audiovisual dependente

de software à trajetória pregressa da televisão. Como

questão empírica, observa-se a dimensão histórica

do vínculo entre Telmex e Globo, com atenção às

múltiplas contradições contidas na rede instituída

por ambas, no interesse de compreender como estes

processos tomam parte na formulação dos sistemas

contemporâneos de comunicação.
O êxito da gula: a indestrutibilidade da imagem totem no caso Aylan Kurdi
Authors: Da Rosa Ana Paula
Published: July 2019

Em um cenário marcado pela midiatização, a cultura

é atravessada por lógicas comunicacionais que se

evidenciam nos dispositivos midiáticos. Tal contexto

é o pano de fundo deste artigo que visa a discutir a

circulação da imagem de Aylan Kurdi, encontrado

morto em uma praia em setembro de 2015. A partir

da hipótese de cinco movimentos de circulação

(ROSA, 2015), questiona-se: em que medida as

fagias social e midiática, perceptíveis pelo consumo

e replicação de fotografias, permitem mobilizar

o programa da gula, criado por Flusser? Para

responder a esta questão desenvolvemos a análise

empírica do caso, além do tensionamento conceitual

de iconofagia (BAITELLO JR, 2005), de gula

(FLUSSER,2006), além dos aportes da midiatização.
Comics Tattoos: normas e singularidade
Authors: Cardoso João Batista Freitas
Published: July 2019

O presente texto visa caracterizar diferentes tipos

de usos de Comics Tattoos e verificar seu potencial

de significação. Para alcançar os objetivos, foram

realizadas entrevista em profundidade e análise

documental, com base na semiótica peirciana. As

entrevistas e análises permitiram constatar que

existem diferentes formas de uso dos personagens

como tatuagens, que são definidas em razão da

história que se deseja contar. Ao se apropriarem

de imagens da indústria de comunicação e

entretenimento, o tatuador e o sujeito tatuado

estabelecem “acordos” entre as normas que

orientam a apropriação e reprodução de imagens

de personagens de histórias em quadrinhos e as

convenções e os hábitos relacionados ao uso e

prática de se tatuar.
A ciência na TV aberta: uma exploração da programação de emissoras de Belém-PA
Authors: Malcher Maria Ataide , Raiol Weverton , Lopes Suzana Cunha , Marques Jane Aparecida , Massarani Luisa , Carvalho Vanessa Brasil de
Published: July 2019

O artigo analisa a presença da ciência na grade de

programação televisiva aberta em duas emissoras

de Belém-PA, a TV Liberal e a Record Belém,

respectivamente retransmissoras da Rede Globo e Rede

Record. A partir da técnica de semana construída e de

análise de conteúdo, mapeou-se a presença da ciência

na programação local, considerando as produções locais

e nacionais. Destaca-se que a ciência está presente

diariamente em todas as faixas horárias da TV aberta; a

publicidade é um dos principais agentes configuradores

deste cenário; e a programação local é centrada no que

é produzido nacionalmente, ocasionando uma produção

local esmaecida e com pouca presença da ciência.
Abordagem crítica da cultura da inspiração: produção de narrativas e o ideário da sociedade empreendedora
Authors: Casaqui Vander
Published: July 2019

No contexto contemporâneo, a inspiração é um

termo recorrente, quando observamos os discursos

que difundem a ideologia do empreendedorismo.

Em abordagem crítica, nossa pesquisa tem como

objetivo analisar o papel das narrativas inspiracionais,

na publicização do ideário da “sociedade

empreendedora”. O objeto deste estudo inclui

discursos de empreendedores e empreendedores

sociais, palestras motivacionais, entre outros produtos

midiáticos que assumem a missão de inspirar. O

resultado desse mapeamento aponta para a cultura

da inspiração como elemento chave para promover

o engajamento dos sujeitos no capitalismo de nosso

tempo, como discutem Boltanski e Chiapello (2009).
Entre Lugares e Imagens: o uso de dispositivos de realidade virtual e a percepção espacial
Authors: Zilles Borba Eduardo
Published: July 2019

Este trabalho realiza uma abordagem sociotécnica para investigar as relações do usuário com dispositivos de Realidade Virtual (RV), em específico o Head-Mounted Display (HMD) do modelo Google Cardboard. Além de estudar o envolvimento do sujeito com o ambiente virtual, é investigada a influência do equipamento na sua percepção espacial. Parte-se do princípio de Fragoso (2015), de que as relações e intersecções da agência usuário-ambiente virtual são governadas por três espaços: espaço imaginado, espaço de enunciação e espaço material. Para investigar estas relações e interseções foi conduzida uma experiência empírica, na qual oito participantes – quatro experientes e quatro inexperientes no uso da RV – utilizaram o dispositivo Cardboard para explorar quatro cenários que diferem-se no contexto, design e funcionalidade. Após as explorações foram aplicadas entrevistas semiestruturadas, a fim de recolher dados sobre a percepção de espaço, materialidade, imersão e interação dos participantes. Em suma, a percepção de espaço imaginado foi relevante para usuários inexperientes, enquanto que o espaço de enunciação foi mais relevante para experientes e, por fim, o espaço material foi responsável por conectar as percepções de espaço de cada tipo de usuário.
Dinâmicas de consumo de bens virtuais: práticas e valores no universo de League of Legends
Authors: Macedo Tarcízio , Vieira Manuela do Corral
Published: July 2019

Este artigo busca compreender o consumo de bens virtuais nas práticas cotidianas de jogadores do jogo on-line League of Legends (LoL) para refletir sobre a própria constituição social dos consumidores deste jogo on-line. O objeto de estudo centrou-se nas skins disponíveis em LoL, as quais foram especificamente observadas nas relações estabelecidas com os jogadores e suas motivações de aquisição e interpretação destes bens no ambiente do jogo. O arcabouço teórico-analítico parte da orientação da abordagem antropológica do consumo. Como recorte empírico, a discussão será evidenciada por meio de uma pesquisa com premissas etnográficas com um grupo de consumidores de LoL das cidades de Belém (PA), Diadema (SP) e Osasco (SP). As reflexões indicam que as motivações principais para o consumo dessas mercadorias em League são baseadas na atuação essencial dos valores simbólicos em detrimento dos valores de uso e de troca.
A construção da norma algorítmica: análise dos textos sobre o Feed de Notícias do Facebook
Authors: Fernandes Araujo Willian
Published: July 2019

O artigo analisa a construção do Feed de Notícias nos textos públicos do Facebook. O objetivo do estudo é entender e mapear as lógicas estabelecidas nesses textos em relação ao uso e funcionamento do mecanismo. Foram analisadas 40 publicações em página institucional do Facebook destinada a apresentar e explicar as mudanças no mecanismo. A análise foi orientada por um entendimento performativo do texto inspirado pelos estudos de ciência e tecnologia e pela Teoria Ator-Rede. Como resultado da análise, foi observada a construção de uma lógica normativa sobre o relacionamento entre produtores de conteúdo e o sistema de classificação do Feed de Notícias, nomeada no estudo como norma algorítmica.
Plasticidade das imagens audiovisuais no espaço acústico-ressonante do cinema
Authors: Machado Irene de Araújo
Published: July 2019

O presente ensaio examina a relação entre espaço e comunicação nos meios audiovisuais marcado pelo domínio do regime escópico em detrimento dos objetos sonoros. Reivindica-se o realinhamento do papel do som na definição audiovisual da cultura, de modo a reposicionar a importância da dimensão sonoro-acústica. Para isso, a hipótese de fundo reconhece que o cinema tem um papel decisivo na renovação da relação do som com o ruído, sobretudo no que diz respeito à consolidação do espaço acústico-ressonante criado pelos meios elétricos. Por conseguinte, entende que matérias sonoras são tão determinantes das imagens audiovisuais quanto a visualidade, como se pode averiguar nas análises fílmicas comparativas. Espera-se, assim, resgatar o legado das culturas acústicas agora reprocessadas em termos de experiência audiovisual de caráter eletrônico-digital.
Kendala-Kendala Dalam Pengambilan Keputusan
Authors: nadiayupika  , Rusdinal  , Afriansyah Hade
Published: July 2019

the smallest obstacle to the actual impact comes from the decision making itself concerned. The obstacle that most often appears is education, the role of the inability of someone to act alone or not firmly. Often a manager talks about himself being chosen by doubts that are so master of the way of thinking and acting. A manager who is hesitant in acting will cause him to give up his decision to his subordinates who are often justified by the exercise of authority. He raised the issue of authority more so that the leadership in the hierarchy that is more resistant then made a decision. He looks for reasons in such a way that the role of making decisions shifts horizontally to other managers on a level
PENGGUNAAN LEMBAR KEGIATAN SISWA INKUIRI TERBIMBING DENGAN PENDEKATAN LINGKUNGAN UNTUK MENINGKATKAN PEMAHAMAN SISWA
Authors: Lidi Maria Waldetrudis , Daud Maimunah H
Published: July 2019

Research has been carried out with the title of the use of activity sheets of guided inquiry students with an environmental approach to improve students' understanding. The formulation of the problem in this study is whether there is an increase in students' understanding of the classification of animals after using inkuri worksheets guided by an environmental approach? while the purpose of this study is to improve students' understanding of animal classification material. This research is a type of quantitative research and is carried out in 7th grade students of SMPK. Yos Sudarso in August 2018. The research used a one group pretest-posttest design. Data collection techniques use test techniques while data analysis uses score determination according to rubric and gain score. Based on the results of data analysis it is known that there is an increase in students' understanding of the material that is seen through an increase in scores from pretest to posttest. Reinforced with a gain score of 0.77 high category. This proves that the use of guided inquiry student activity sheets with an environmental approach can improve the understanding of grade 7 students of SMPK. Yos Sudarso on animal classification material.
The role of perceiving calling in career as a mediator in the relationship between personal growth initiative and career commitment among millennials
Authors: Amanda  , Yuliawati Livia
Published: July 2019

As the generation dominating the workforce, millennials are reported to have low work engagement and frequent changes in jobs. Since millennials regard that career is not only limited to organization and prefer to seek purpose and self-development at work, career commitment is one of the interesting topics to investigate. The present study aims to examine whether perceiving calling in carer can serve as a mediator to explain the link between personal growth initiative and career commitment among millennials. Participants were 109 millennials aged 18-32 years. Data collection is carried out through online surveys. The result shows that perceiving calling in career fully mediates the relationship between personal growth initiative and career commitment.
Pantauan perubahan tutupan padang lamun menggunakan citra Sentinel-2 time-series di wilayah pesisir Pulau Derawan
Authors: Fauzan M. Afif , Hartono  , Wicaksono Pramaditya
Published: July 2019

Pemantauan kondisi lamun penting untuk dilakukan terutama pada wilayah yang terdapat kecenderungan mengalami tekanan. Pada penelitian ini, delapan citra penginderaan jauh Sentinel-2 MSI time-series digunakan untuk mengidentifikasi perubahan persentase tutupan lamun pada tahun 2016 hingga 2017, serta mengetahui kemampuan algoritma klasifikasi dan regresi sederhana yang diterapkan pada citra Sentinel-2 MSI dalam memetakan dan memantau perubahan lamun dari waktu ke waktu. Penelitian ini dilakukan di wilayah pesisir Pulau Derawan, Berau, Kalimantan Timur, Indonesia, di mana keberlanjutan ekosistem padang lamun terancam oleh peningkatan aktivitas pariwisata dan overgrazing oleh penyu hijau. Hasil penelitian menunjukkan persentase tutupan di wilayah pesisir Pulau Derawan bervariasi dari waktu ke waktu. Terdapat pola perubahan musiman dengan tren penurunan yang terjadi pada rentang waktu 2016 hingga 2017. Dibandingkan dengan algoritma klasifikasi berbasis statistik Maximum Likelihood, algoritma klasifikasi pembelajaran mesin Random Forest mampu memetakan distribusi lamun secara lebih baik dengan akurasi pemetaan mencapai 93%. Dalam mengestimasi persentase tutupan secara kontinyu, reflektansi saluran hijau dari citra Sentinel-2 MSI ditemukan sebagai prediktor terbaik dengan koefisien determinasi (R2) 0,61 dan standard error of estimate (SE) 17%.
Similarities and Differences in Adolescents’ Organized and Civic Activity Networks among Rural and Non-Rural Youth
Authors: Oosterhoff Benjamin , Alvis Lauren
Published: July 2019

Youth are often involved in multiple organized and civic activities simultaneously, resulting in complex patterns or ‘networks’ of participation. Little research has examined the network structure of adolescents’ organized and civic participation and whether these networks differ for youth from rural and non-rural communities. Youth (N=902; Mage=15.90) from a rural (n=476) and non-rural (n=426) community completed measures assessing engagement in 25 civic and organized activities. Network analysis indicated that activities in the rural community had greater network density relative to the non-rural community. Volunteering to clean up the neighborhood was most central to both networks. Church attendance and community sports were more central for the rural network, whereas protesting and school arts were more central for the non-rural network.
Masking auditory feedback does not eliminate repetition reduction
Authors: Jacobs Cassandra Leigh , Loucks Torrey M. , Watson Duane , Dell Gary S.
Published: July 2019

Repetition reduces word duration. Explanations of this process have appealed to audience design, internal production mechanisms, and combinations thereof (e.g. Kahn & Arnold, 2015). Jacobs, Yiu, Watson, and Dell (2015) proposed the auditory feedback hypothesis, which states that speakers must hear a word, produced either by themselves or another speaker, in order for duration reduction on a subsequent production. We conducted a strong test of the auditory feedback hypothesis in two experiments, in which we masked auditory feedback and whispering to prevent speakers from hearing themselves fully. Both experiments showed that despite limiting the sources of normal feedback, repetition reduction was observed to equal extents in masked and unmasked conditions, suggesting that repetition reduction may be supported by multiple sources, such as somatosensory feedback and feedforward signals, depending on their availability.
Seeking Theoretical Common Ground: An Integrative Framework of Understanding Accountability for Service Delivery in the Community School in Nepal
Authors: Khanal Kul Prasad
Published: July 2019

Existing literature provides ample evidence on how people understand accountability in different contexts. However, little attention has been paid on the integration of various theoretical perspectives about understanding accountability for education service delivery. Discussing theoretical premises against the empirical evidence from the community schools of Nepal, this article explores common ground of various theoretical perspectives about understanding school actors' accountability. It provides a framework for understanding accountability by integrating the ancient principle of 'karma-yoga' and modern theoretical ingredients of structure-agency and knowledge-power. The article argues that both ancient and modern streams of theoretical perspectives are not mutually exclusive rather they share a common ground of process-based accountability which is embedded in broader concept of responsibility. Finally, the paper contributes to existing literature of accountability in education arguing that the school head’s agency rather than working structure of the school played a significant role in creating an accountable space between the school head and other actors in the community school.
AKTIVITAS ANTIBAKTERI EKSTRAK ETANOL DAUN PARIJOTO (Medinilla speciosa Blume) TERHADAP PERTUMBUHAN BAKTERI Propionibacterium acnes DAN Staphylococcus aureus
Authors: Sugiarti Lilis , Fitrianingsih Sri
Published: July 2019

Penyakit kulit seperti jerawat dapat terjadi jika saluran menuju permukaan kulit untuk mengeluarkan sebum yang diproduksi oleh kelenjar minyak rambut pada lapisan dermis tersumbat penyebab utamanya Propionibacterium acnes. Tanaman yang berperan sebagai antibakteri salah satunya adalah parijoto (Medinilla speciosa, Blume). Kandungan bahan aktif dari parijoto yaitu flavonoid, saponin dan tanin. Flavonoid bertindak sebagai penghambat pertumbuhan sel kanker, saponin yang mempunyai aktivitas antitumor dan tanin yang beraktivitas sebagai antibakteri. Penelitian ini bertujuan untuk mengetahui aktivitas antibakteri dan Konsentrasi Hambat Minimal (KHM) ekstrak etanol daun parijoto terhadap bakteri Propionobacterium acnes dan Staphylococcus aureus serta untuk mengetahui adanya korelasi antara aktivitas antibakteri dan konsentrasi ekstrak etanol.  Metode yang dilakukan yaitu pengolahan sampel sampai diperoleh serbuk dan diekstraksi menggunakan metode maserasi serta diujikan pada bakteri dengan metode pour. Hasil uji dilakukan analisis menggunakan SPSS dengan analisis oneway ANOVA. Hasil dari analisis oneway ANOVA diameter zona  hambat terhadap bakteri Propionibacterium acnes dan Staphylococcus aureus diperoleh signifikansi 0,000 (p0,05). Hasil dari korelasi pada bakteri propionibacterium acnes mempunyai besaran korelasi antara jumlah konsentrasi dan daya hambat terhadap bakteri adalah 0,886 dan p value sebesar 0,000 0,05 dan pada bakteri Staphylococcus aureus sebesar 0,903 dan p value sebesar 0,000 0,05 dapat disimpulkan bahwa terdapat hubungan yang signifikan. Ekstrak etanol daun parijoto mempunyai potensi antibakteri terhadap pertumbuhan bakteri Propioniacterium acnes dan Staphylococcus aureus dengan konsentrasi hambat minmal pada konsentrasi 6,25 mg/ml dan terdapat hubungan positif antara konsentrasi ekstrak etanol daun parijoto dengan diameter zona hambat bakteri. Kata kunci: Ekstrak etanol daun parijoto, KHM, Propionibacterium acnes, Staphylococcus aureus.