bluuebunny/crossref_metadata_2025 huggingface dataset:
PENGARUH MODEL PEMBELAJARAN CRH BERBANTUAN MEDIA AUDIO VISUAL TERHADAP HASIL BELAJAR IPS
Authors: Pratama G.H. Andika , Renda Ndara Tanggu , Pudjawan Ketut
Published: September 2019

Penelitian ini bertujuan untuk mengetahui perbedaan hasil belajar IPS siswa kelas V SD di Gugus II Kecamatan Tejakula semester genap tahun pelajaran 2017/2018 antara kelompok siswa yang dibelajarkan menggunakan model pembelajaran Course Review Horay berbantuan media audio visual dan kelompok siswa yang dibelajarkan bukan menggunakan model pembelajaran Course Review Horay. Jenis penelitian ini adalah eksperimen semu dengan rancangan non equivalent post-test only control group design. Populasi penelitian ini adalah seluruh siswa kelas V SD di Gugus II Kecamatan Tejakula tahun pelajaran 2016/2017 sebanyak 162 orang. Sampel dalam penelitian ini adalah siswa kelas V SD Negeri 5 Les sebanyak 30 orang dan siswa kelas V SD Negeri 1 Les sebanyak 39 orang, yang ditentukan melalui teknik rondom sampling.  Data hasil penelitian diperoleh melalui metode tes instrumen pilihan ganda yang dianalaisis menggunakan teknik analisis statistik deskriptif dan statistik infrensial (uji-t). Hasil penelitian menunjukkan bahwa terdapat pengaruh yang signifikan hasil belajar IPS antara kelompok siswa yang dibelajarkan menggunakan model pembelajaran Course Review Horay berbantuan media audio visual dan kelompok siswa yang dibelajarkan bukan menggunakan model Course Review Horay, dengan nilai t hitung = 2,384 lebih besar dari t tab =1,980. Artinya perbedaan dalam penerapan model pembelajaran dapat memengaruhi hasil belajar IPS siswa kelas V SD di Gugus II Kecamatan Tejakula semester genap tahun pelajaran 2017/2018. Rekomendasi untuk guru dalam meningkatkan hasil belajar IPS siswa kelas V di gugus II Kecamatan Tejakula adalah menggunakan model pembelajaran Course Review Horay  berbantuan media audio visual. Kata-kata kunci : model pembelajaran course review horay, media audio visual, hasil belajar IPS.
Conhecimentos Pedagógico, Tecnológico e do Conteúdo na Formação Inicial do Professor de Matemática
Pedagogical, Technological and Content Knowledge in the Prospective Teacher Education in Mathematics
Authors: Richit Adriana , Colling Juliane
Published: September 2019

O artigo aborda as perspectivas de uso das tecnologias digitais na formação inicial em matemática com ênfase na prática docente na educação básica. A análise, baseada nos conhecimentos tecnológico, pedagógico e de conteúdo de Mishra e Koehler, centrou-se nos documentos curriculares de um Curso de Licenciatura em Matemática de uma universidade pública federal de Santa Catarina, bem como sobre os planos de ensino das diferentes disciplinas e nos dados constituídos mediante a aplicação de questionários e a realização de entrevistas com professores e estudantes do referido Curso. Os resultados apontam quatro perspectivas de articulação das tecnologias aos conhecimentos do conteúdo e pedagógico no Curso. A análise e discussão destas perspectivas indica que a articulação entre os conhecimentos pedagógico, tecnológico e do conteúdo nas atividades formativas do Curso contribuem para a formação inicial do professor em direção às mudanças nas práticas profissionais na educação básica.
Tendências em Tecnologias Digitais no Ensino da Matemática Reveladas no EBRAPEM
Authors: Felcher Carla Denize Ott , Pinto Ana Cristina , Folmer Vanderlei
Published: September 2019

Neste artigo apresentamos e analisamos as tendências em Tecnologias Digitais no ensino da Matemática, apontadas nas edições XVIII, XIX, XX e XXI do Encontro Brasileiro de Estudante de Pós-Graduação em Educação Matemática. Como procedimentos metodológicos, utilizou-se da combinação de estado da arte e da meta-análise de 141 trabalhos, entre resumos e artigos completos, publicados nos anais dos anos de 2014 a 2017. Os resultados apontam que predominam as pesquisas de mestrado, envolvendo principalmente estudantes da educação básica. Ainda, observam-se como tendência nos anos de 2014 e 2015 as pesquisas envolvendo a temática tecnologia digital. No ano de 2016, o destaque foi para o software GeoGebra, seguido do tema Tecnologias Digitais e do uso de vídeos. E por fim, em 2017, permanece o software GeoGebra em destaque, seguido dos vídeos.
A confecção de histórias em quadrinhos como mecanismo de aprendizagem de geometria
The making of comics as a learning mechanism of geometry
Authors: Assis Elias Santiago de
Published: September 2019

A presente investigação, de natureza qualitativa, tem como objetivo investigar os contributos da confecção de histórias em quadrinhos (HQs) na aprendizagem de geometria de futuros professores de matemática. Para isso, foi realizado um estudo de caso envolvendo um grupo de estudantes de um curso de licenciatura em matemática de uma universidade pública do estado da Bahia. Estes sujeitos produziram HQs cujos conteúdos versavam sobre assuntos da geometria euclidiana plana estudados em um componente curricular de nome quase homônimo. Além das HQs, constituiu-se enquanto instrumento de recolha de dados um questionário aplicado aos participantes na perspectiva de compreender o processo de criação das HQs sob a ótica desses sujeitos. Os resultados revelaram que, além da produção de um material de didático, a elaboração das HQs fez com que os futuros docentes expusessem os ganhos e as fragilidades quanto à aprendizagem de geometria.
Peirce’s Convergence Theory of Truth Redux
Authors: Liszka James Jakób
Published: August 2019

A teoria convergente da verdade de Peirce é uma abordagem intuitiva e razoável da verdade. No seu sentido mais geral, vincula a verdade aos resultados da investigação. De acordo com a máxima pragmática, Peirce percebeu que as consequências práticas de afirmações verdadeiras são de trazer investigações à fruição e resolver opinião. No entanto, a teoria da verdade de Peirce é muitas vezes difamada e mal-entendida. Argumenta-se, aqui, que uma vez que se entende que a teoria convergente é uma inferência e generalização oriunda do notável teorema matemático conhecido como a Lei dos Grandes Números, e como esse teorema fornece certeza matemática à indução como o cerne do método científico, muitos dos problemas desaparecem. Parte do mal-entendido também se deve ao fato que Peirce tinha três sentidos distintos de convergência, os quais muitos comentadores confundem ou interpretam erroneamente. Com esse entendimento, será mostrado que ao contrário das análises de Cheryl Misak e Christopher Hookway, Peirce argumenta que investigação persistente por bons métodos não é apenas um ideal regulador para atingir a verdade – uma esperança intelectual – mas uma possibilidade comprovada matematicamente que já resultou em verdades estabelecidas.
Häpeä ja stigma mielisairaaloiden potilaiden ja heidän omaistensa muistoissa
Authors: Maanmieli Taija Karoliina
Published: September 2019

Mielenterveysongelmiin liittyy korostunut häpeän tunne. Erityisesti mielisairaalaan joutuminen on monelle häpeällinen kokemus, josta on vaikeaa puhua. Tässä artikkelissa tarkastelen mielisairaalaan liittyvää häpeää psykiatristen sairaaloiden potilaiden ja heidän omaistensa kirjoittamien muistojen valossa. Artikkeli pohjautuu Suomalaisen Kirjallisuuden Seura ry:n Muistoja ja kokemuksia mielisairaaloista –muistoaineistoon, joka on kerätty 90 eri kirjoittajalta vuosina 2014-15. Muistoista vanhin sijoittuu 1930 –luvulle ja tuoreimmat 2010 –luvulle. Pohdin, miten häpeää kuvataan muistoissa, millaisiin tilanteisiin se liittyy ja miten se rakentuu keruukutsun pohjalta muodostuneessa muistoaineistossa. Muistokeruumateriaalin erityisyys on otettu huomioon aineiston analyysissa liittämällä tekstiin runsaasti aineisto-otteita, joiden kautta lukija saa kokonaisnäkemyksen aineiston luonteesta sekä voi seurata analyysia ja sen johtopäätöksiä. Potilaiden häpeän tunteissa korostuu stigma, joka on rakentunut osaksi omaa identiteettiä. Häpeä kytkeytyy hoitojärjestelmän valtarakenteisiin ja käytettyihin pakkokeinoihin, kuten eristykseen joutumiseen tai vastentahtoiseen psyykenlääkitykseen. Traumaattisia kokemuksia on aineistossa usein kuvattu metaforisen kielen kautta. Koko aineistoa, mutta erityisesti potilaiden omaisten muistoja, sävyttää ajatus häpeän ylisukupolvisuudesta ja taakkasiirtymistä. Vaikka asenteet mielenterveysongelmia kohtaan ovat muuttuneet, on häpeä yhä toipumista hankaloittava seikka. Sen vastavoimana voi kuitenkin nähdä toivon, jonka ylläpitämisessä ja herättämisessä potilaan läheiset ja hoitotyöntekijät ovat keskeisessä roolissa.
The Right of Peoples to Self-Determination (a Case of Abkhazia)
Authors:   Kuban State Technological University, Tuzhba Emir Nodarievich , Pchegatluk Svetlana Kalacherievna ,   Kuban State Technological University
Published: August 2019

There are two opposing trends in national self-determination: the separating, national libera-tion trend and the unifying, often imperial one. The right of peoples to self-determination is con-fronted with political and legal realities where territorial integrity is institution-alized. At the same time, self-proclamation is a logi-cal process of world history and international law, as exemplified by the increased number of independent states. To preserve their cultural identity, peoples seek self-determination and state sovereignty. Their readiness to make sacrifices for this purpose causes many conflicts while the territory serves as the mate-rial basis for nation-state sovereignty. The study shows that the current standards of interstate rela-tions are imperfect, and states use these standards for their own benefit when recognizing new states.
Collision-Free Autonomous Robot Navigation in Unknown Environments Utilizing PSO for Path Planning
Authors: Krell Evan , Sheta Alaa , Balasubramanian Arun Prassanth Ramaswamy , King Scott A.
Published: August 2019

The autonomous navigation of robots in unknown environments is a challenge since it needs the integration of a several subsystems to implement different functionality. It needs drawing a map of the environment, robot map localization, motion planning or path following, implementing the path in real-world, and many others; all have to be implemented simultaneously. Thus, the development of autonomous robot navigation (ARN) problem is essential for the growth of the robotics field of research. In this paper, we present a simulation of a swarm intelligence method is known as Particle Swarm Optimization (PSO) to develop an ARN system that can navigate in an unknown environment, reaching a pre-defined goal and become collision-free. The proposed system is built such that each subsystem manipulates a specific task which integrated to achieve the robot mission. PSO is used to optimize the robot path by providing several waypoints that minimize the robot traveling distance. The Gazebo simulator was used to test the response of the system under various envirvector representing a solution to the optimization problem.onmental conditions. The proposed ARN system maintained robust navigation and avoided the obstacles in different unknown environments. vector representing a solution to the optimization problem.
Decision-Making Enhancement in a Big Data Environment: Application of the K-Means Algorithm to Mixed Data
Authors: Koren Oded , Hallin Carina Antonia , Perel Nir , Bendet Dror
Published: August 2019

Big data research has become an important discipline in information systems research. However, the flood of data being generated on the Internet is increasingly unstructured and non-numeric in the form of images and texts. Thus, research indicates that there is an increasing need to develop more efficient algorithms for treating mixed data in big data for effective decision making. In this paper, we apply the classical K-means algorithm to both numeric and categorical attributes in big data platforms. We first present an algorithm that handles the problem of mixed data. We then use big data platforms to implement the algorithm, demonstrating its functionalities by applying the algorithm in a detailed case study. This provides us with a solid basis for performing more targeted profiling for decision making and research using big data. Consequently, the decision makers will be able to treat mixed data, numerical and categorical data, to explain and predict phenomena in the big data ecosystem. Our research includes a detailed end-to-end case study that presents an implementation of the suggested procedure. This demonstrates its capabilities and the advantages that allow it to improve the decision-making process by targeting organizations’ business requirements to a specific cluster[s]/profiles[s] based on the enhancement outcomes.
GAMBARAN MINAT KEWIRAUSAHAAN MAHASISWA
Authors: Pujiastuti Yanti , Filantrovi Eldes Willy
Published: August 2019

This study aims to find out the description of students' entreprenership interests and the factors that influence them. Factors studied are motivation, education and family environment. The study was conducted on STIE Bank BPD Central Java students who have taken entrepreneurship courses. Sampling using purposive sampling and obtained 90 samples. Data collected through questionnaires were analyzed using regression techniques. The test results found that partially the entrepreneurship motivation and entrepreneurship education had a positive and significant effect on entrepreneurial intention. Simultaneous testing shows that entrepreneurship motivation, entrepreneurial education and family environment together have a significant effect on entrepreneurial intention. Efforts to increase entrepreneurship intention can be done by increasing entrepreneurship motivation and entrepreneurship education.
PENGARUH KOMPENSASI TERHADAP TURNOVER INTENTION YANG DIMEDIASI OLEH ORGANIZATIONAL COMMITMENT KARYAWAN PT IDX
Authors: Sandy Fransiskus Billy
Published: August 2019

This study aims to determine the condition of the Compensation, Organizational Commitment, and Turnover Intention on employees of PT IDX.  The population in this study were employees of PT IDX totaling 108 employees. Data retrieval is done by using questionnaire. Data is processed using SPSS ver. 25 for Window and Hayes Macro Process. The results of the study show that: First, the Compensation has no significant effect on Turnover Intention. Second, the Compensation has a positive and significant effect on the Organizational Commitment. Third, the Organization Commitment has a negative and significant effect on Turnover Intention. Fourth, the Organizational Commitment mediates the relationship between the Compensation to Turnover Intention.
INTERVENSI KEADILAN DAN ENGAGEMENT TERHADAP KEPEMIMPINAN DALAM MENINGKATKAN KOMITMEN ORGANISASIONAL KARYAWAN PERUSAHAAN DI JABODETABEK
Authors: Mulyana Sopyan
Published: August 2019

This research aims is to investigate the effects of transformational leadership, organizational justice, employee engagement toward organizational commitment. The background of this research based on the Gallup’s survey 2017 which reported that Indonesian’s employees who were engaged to their job and companies at the low level of 15% compare to four Southeast Asian countries: Malaysia 17%, Singapore 23%, Thailand 23%, and Philippines 36%. In response, to chase this lagging behind is required to conduct empirical studies to find the predictors that have significant effect toward employee engagement particularly in the Indonesian context.

Due to the population is too broad hence this research is limited by area of Jakarta, Bogor, Depok, Tanggerang and Bekasi (JABODETABEK). The data was collected by questionnaire method through online survey with snowball sampling technique. The survey was responded by 188 repondents from various industries and position levels, which then selected only 128 respondents who qualified for this research are non-Board of Director and working in JABODETABEK area.

This research apply path analysis technique and the data was processed using macro process SPSS by Andrew F. Hayes which aims to investigate the direct and indirect effects of the independent variables on the dependent through the mediators. The finding is transformational leadership has the indirect effect on organizational commitment through organizational justice and employee engagement, both alone or in serial, and organizational justice found has the strongest mediation effect on non-serial mediation.
The Impact of Investment Decision and Funding on Financial Performance and Firm Value
Authors: Santoso Hadi
Published: August 2019

Managers who are responsible for the management of companies are faced with two important decisions - investment and funding. The right investment decisions and choice of funding sources are important because they affect the company's financial performance. The selection of the types of assets to be invested and the right types of financing sources result in optimal returns for the company. It reflects good company performance and future prospects. In addition, optimal return is a good sign for investors. Companies that perform well experience increase in the value of their firm. This study examined the effect of investment decisions and the selection of appropriate sources of funds on the performance of the company and the consequent impact on the firm value. The study was conducted in two parts. The first part examined the effect of investment decisions on long-term assets with long-term funding on the rate of return and firm value. The second part examined the effect of investment decisions on the company's short-term assets and funding for financial performance and firm value. The case study used in this research is a consumer goods sub-sector company listed on the Indonesia Stock Exchange in the period 2010 to 2017. Path analysis is the data analysis tools that was used. The results of data analysis showed that the asset structure has an effect on financial performance and firm value. The capital structure affects the financial performance but does not affect the firm value of the company. Financial performance was measured by ROI.
Grand-Reaction Method for Simulations of Ionization Equilibria and Ion Partitioning in a Broad Range of pH and Ionic Strength
Authors: Landsgesell Jonas , Rud Oleg , Hebbeker Pascal , Lunkad Raju , Košovan Peter , Holm Christian
Published: August 2019

We introduce the grand-reaction method for coarse-grained simulations of acid-base equilibria in a system coupled to a reservoir at a given pH and concentration of added salt. It can be viewed as an extension of the constant-pH method and the reaction ensemble, combining explicit simulations of reactions within the system, and grand-canonical exchange of particles with the reservoir. Unlike the previously introduced methods, the grand-reaction method is applicable to acid-base equilibria in the whole pH range because it avoids known artifacts. However, the method is more general, and can be used for simulations of any reactive system coupled to a reservoir of a known composition. To demonstrate the advantages of the grand-reaction method, we simulated a model system: A solution of weak polyelectrolytes in equilibrium with a buffer solution. By carefully accounting for the exchange of all constituents, the method ensures that all chemical potentials are equal in the system and in the multi-component reservoir. Thus, the grand-reaction method is able to predict non-monotonic swelling of weak polyelectrolytes as a function of pH, that has been known from mean-field predictions and from experiments but has never been observed in coarse-grained simulations. Finally, we outline possible extensions and further generalizations of the method, and provide a set of guidelines to enable safe usage of the method by a broad community of users.
A Machine Learning Approach for Predicting Defluorination of Per- and Polyfluoroalkyl Substances (PFAS) for Their Efficient Treatment and Removal
Authors: Raza Akber , Xu Lihua , Yamijala Sharma , Lian Chao , Kwon Hyuna , Wong Bryan
Published: September 2019

We present the first application of machine learning on per- and polyfluoroalkyl substances (PFAS) for predicting and rationalizing carbon-fluorine (C–F) bond dissociation energies to aid in their efficient treatment and removal. Using a variety of machine learning algorithms (including Random Forest, Least Absolute Shrinkage and Selection Operator Regression, and Feed-forward Neural Networks), we were able to obtain extremely accurate predictions for C–F bond dissociation energies (with deviations less than 0.70 kcal/mol) that are within chemical accuracy of the PFAS reference data. In addition, we show that our machine learning approach is extremely efficient (requiring less than 10 minutes to train the data and less than a second to predict the C–F bond dissociation energy of a new compound) and only needs knowledge of the simple chemical connectivity in a PFAS structure to yield reliable results – without recourse to a computationally expensive quantum mechanical calculation or a three-dimensional structure. Finally, we present an unsupervised machine learning algorithm that can automatically classify and rationalize chemical trends in PFAS structures that would otherwise have been difficult to humanly visualize/process manually. Collectively, these studies (1) comprise the first application of machine learning techniques for PFAS structures to predict/rationalize C–F bond dissociation energies and (2) show immense promise for assisting experimentalists in the targeted defluorination of specific bonds in PFAS structures (or other unknown environmental contaminants) of increasing complexity.
The Geode Process I: Hollow Silica Microcapsules as a High Surface Area Substrate for Semiconductor Nanowire Growth
Authors: Mujica Maritza , Tutuncuoglu Gozde , Mohabir Amar , Breedveld Victor , Behrens Sven , Filler Michael
Published: September 2019

We introduce and demonstrate critical steps toward the Geode process for the bottom-up synthesis of semiconductor nanowires. Central to the process is the design and fabrication of an unconventional, high surface area substrate: the interior surface of hollow silica microcapsules, assembled from silica particles via emulsion templating, and featuring porous walls to enable efficient gas transport. The interior surface of these hollow silica microcapsules is decorated with gold nanoparticles that seed nanowire growth via the vapor-liquid-solid (VLS) mechanism. We demonstrate the production of the necessary microcapsules and show how microcapsule structure and stability upon drying is influenced by the type of silica particles and use of a particle cross-linking agent. Finally, we demonstrate the synthesis of Si nanowires in the microcapsule interior.
Perfiles y roles de los conductores de TV en momentos de desastres: propuesta conceptual a partir del caso del terremoto del 27F en Chile
Authors: Grassau Daniela , Puente Soledad , Vatter Nicolás , Rojas Rodrigo
Published: September 2019

A partir del análisis de discurso de las intervenciones de los conductores de noticiarios de TV abierta de Chile durante el terremoto de 8,8 Mw de 2010, se desarrolló una propuesta conceptual de perfiles y roles que estos pueden asumir durante la cobertura de un desastre. Esta se usó para identificar y describir la presencia de tres potenciales perfiles: informativo (presentación descriptiva del contenido), opinante (predominio del juicio de valor), y de diálogo con la audiencia (mensaje directo a los espectadores). Los datos muestran que el perfil predominante fue el informativo, que el opinante aparece con fuerza durante los primeros días de desastre y luego se debilita, y que el de diálogo con la audiencia comienza a tomar fuerza desde el tercer día. Estos resultados abren una línea de investigación sobre el rol de los medios en la promoción de la recuperación espontánea del trauma que experimenta la población.
Problems of learning and intervention
Authors: Macías María Elizabeth Lucas , Martinez María Elena Moya
Published: August 2019

This article refers to the different learning problems that the students present and that should have detected in time by the teachers so that they receive the pedagogical intervention in a timely manner. Among these difficulties are learning disorders, such as dyslexia, dyscalculia, dysgraphia, discography, dyslalia, and attention deficit and hyperactivity. The objective is to meet the educational needs of students with appropriate strategies and methodologies to avoid school failure; the methodology used was a bibliographic review to find out the causes and the treatment that the teacher must apply in the teaching-learning process of the student.
AMANAH DAN KEPUASAN KONSUMEN DALAM MEMPREDIKSI PRODUKTIVITAS RIDER OJEK ONLINE
Authors: Oktarisa Fidia , Nanda Citra Anisa
Published: August 2019

Keberadaan rider ojek online sebagai salah satu dampak perkembangan teknologi di industri transportasi. Penting bagi perusahaan untuk meninjau produktivitas, sebagai bentuk pencapaian dalam memberikan kepuasan terhadap pelanggan dengan memegang nilai amanah sebagai salah satu keyakinan dalam menjalankan sistem online. Sehingga peneliti tertarik melihat korelasi antara kepuasan pelanggan dan amanah dalam memprediksi produktivitas rider ojek. Teknik sampling yang digunakan pada penelitian ini adalah purposive sampling. Pengumpulan data menggunakan skala amanah dan skala kepuasan konsumen, dengan jumlah subjek 112 pelanggan dan untuk variabel produktivitas rider menggunakan 112 data survey produktivitas melalui akun pribadi rider ojek online dengan metode wawancara. Hasil analisis regresi linier berganda menunjukkan bahwa nilai F (2,109)=0,62, p < 0,540, dengan R2=0,01 menyatakan bahwa secara signifikan kepuasan konsumen dan amanah tidak memberi pengaruh terhadap pencapaian produktivitas riderojek online PT. X.
NEUROPHYSIOLOGY AND ULTRASOUND IN THE EVALUATION OF PHRENIC NERVE IN NORMAL AND PATHOLOGIC CONDITIONS
Authors: Voitenkov V. B. , Komantsev V. N. , Ekusheva E. V. , Klimkin A. V. , Skripchenko N. V.
Published: September 2019

We provide data on neurophysiology and ultrasound of phrenic nerve. In the visualization of the phrenic nerve the main role is played by ultrasound. Conduction study of the phrenic nerve, if performed properly, is a simple and reliable method. In pediatric population, though, age dynamic and wide range of normative parameters has to be taken into the consideration. Ultrasound of the phrenic nerve allows visualization of the anatomical continuity of the nerve trunk of the nerve at the level of the neck and objectively assess the thickness of the nerve, which provides additional information to the doctor in clinical practice.
PENYISIHAN ION LOGAM Fe PADA AIR GAMBUT MENGGUNAKAN ADSORBEN ARANG AKTIF KULIT SINGKONG
Authors: Rosita Elia , Zaini Halim , Fauzan Reza
Published: September 2019

Arang aktif dapat dibuat dari berbagai macam bahan baku  salah satunya adalah kulit singkong karena kulit singkong memiliki kandungan karbon sebesar 59,31%. Salah satu pemanfaatan arang aktif adalah sebagai adsorben arang aktif pada pemurnian air gambut. Pada rancangan percobaan, sebagai variabel tetap digunakan berat adsorben arang, yaitu sebesar 50 g, ukuran partikel 10 mesh dan volume adsorbat digunakan 10 liter, laju alir 4 liter/menit. Variabel bebas waktu adsorpsi 0; 30; 60; 90; 120; 180; 240 menit dan jenis adsorben: aktivasi fisik dan aktivasi kimia (H2SO4 5N dan NaOH 5N). Hasil penelitian menunjukan bahwa adsorpsi logam Fe dipengaruhi oleh waktu dan aktivator. Model kinetika adsorpsi memenuhi kinetika pseudo orde dua terjadi pada waktu 180 menit untuk aktivasi fisika sebesar 0,05228 mg/g, aktivasi kimia H2SO4 0,5 N 0,09199 mg/g dan aktivasi kimia NaOH 0,5 N 0,11298 mg/g. Persen masa penyisihan Fe tertinggi untuk aktivasi fisika 33,25%, aktivasi kimia dengan H2SO4 5N 80,20% dan aktivasi kimia dengan NaOH 5N 52,55%.
Cromosomas y evolución en Arachis (Leguminosae)
Authors: Fernández Aveliano , Krapovickas Antonio
Published: September 2019

Fueron analizadas citológicamente cuarenta y un especies pertenecientes a ocho de las nueve secciones del género Arachis. Se analizaron en detalle los cariotipos veinticuatro de las cuarenta y un especies. Todas las especies tienen un par de cromosomas con satélite, excepto A. valida, que tiene dos pares. Los satélites se clasifican en diez tipos. Las secciones Procumbentes, Erectoides, Extranervosae, Caulorrhizae, Rhizomatosae, Heteranthae y Trierectoides tienen sólo uno o dos tipos de cromosomas con satélite, mientras que la sect. Arachis tiene seis tipos. Un par de cromosomas pequeños se encuentran en la sect. Arachis, excepto en A.batizocoi, A. ipaensis, A. glandulifera, A. magna y A. benensis. A. glandulifera (sect. Arachis) tiene el cariotipo más asimétrico, con seis pares de cromosomas subtelocéntricos y A.guaranitica (sect. Trierectoides) tiene el cariotipo más simétrico. Esto apoya la hipótesis de que la sect. Trierectoides es la más antigua en el género y la sect. Arachis tiene un origen más reciente. Teniendo en cuenta los cariotipos, morfología externa y la distribución geográfica, A. duranensis y A. ipaensis son probablemente los donantes del genoma de A.hypogaea.
Relaciones, rupturas y puentes entre sindicalismo y jóvenes precarizados durante la postconvertibilidad. Un estudio a partir del caso de pasantes de la Administración Pública entre 2008 y 2012
Authors: Adamini Marina
Published: September 2019

Este artículo busca problematizar la relación entre jóvenes trabajadores y organizaciones sindicales durante la postconvertibilidad, en el marco de un contexto laboral atravesado por el crecimiento del empleo y la reactivación de las acciones colectivas en los lugares de trabajo, que mantiene la precariedad laboral. Dicha problemática será abordada a través de un estudio de caso centrado en pasantes universitarios de un organismo de la Administración Pública bonaerense en la ciudad de La Plata, provincia de Buenos Aires, entre 2008 y 2012. Desde una perspectiva cualitativa, se utilizará como herramienta metodológica la realización las entrevistas en profundidad y el análisis del discurso. Se analizarán los sentidos y prácticas de estos jóvenes en relación con las organizaciones sindicales, en el marco del proceso de lucha por ellos desarrollado frente a la precarización de su lugar de trabajo.
Periodismo alternativo: lecciones y desafíos Experiencias locales de prensa alternativa en Bogotá
Authors: Valenzuela Echeverri Carlos Eduardo
Published: September 2019

Se presentan aquí los resultados parciales de una investigación etnográfica llevada a cabo en Bogotá, a propósito de la noción de periodismo que respalda el quehacer de dos experiencias locales de prensa comunitaria y alternativa. El objeto de tal análisis radicó en caracterizar tanto el enfoque ideológico que los moviliza, como el sentido progresista de su práctica periodística y comunicativa en el contexto urbano.
Principales líneas sobre la persona jurídica en el Código Civil y Comercial
Authors: Junyent Bas Francisco A.
Published: September 2019

l Código de Vélez receptó una teoría general de las personas físicas y jurídicas cuando estableció en el art. 30 que: “son personas todos los entes susceptibles de adquirir derechos y contraer obligaciones”. A su vez, el art. 31 de dicho cuerpo legal sigue el sistema “binario” al señalar que las personas son: “de existencia ideal o de existencia visible”. Igualmente, el art. 32 conceptualizó por exclusión a las personas de existencia ideal, y en el art. 51, a las personas de existencia física. El nuevo Código Civil y Comercial (CCC) pareciera apartarse de esta teoría general, sin perjuicio de lo cual, cabe aclarar que una correcta articulación del art. 19 y siguientes, que regulan la “persona humana”, como así también del art. 141, referido a la persona jurídica, permite afirmar que el término “persona” sigue siendo una “categoría jurídica”, más allá de que por obvias razones el hombre es anterior al derecho, y consecuentemente, éste último es siempre instrumental y no podría desconocerse, como en otras épocas, el carácter de persona del ser humano. En los “Fundamentos” del Anteproyecto, la Comisión redactora nada dice en este aspecto, pero cabe afirmar que la nueva compilación sigue respetando el sistema “binario” al reglar por un lado, lo que ahora se denomina “persona humana”, y por el otro, a la “jurídica”.
La moderación de la cláusula penal en el derecho español: cuestiones actuales
Authors: Álvarez Álvarez Henar
Published: September 2019

En el presente trabajo se aborda la cuestión de cuándo procede la moderación de la cláusula penal en el ordenamiento jurídico español, teniendo en cuenta la reciente jurisprudencia al respecto. Así, se llega a la conclusión de que solo procede la moderación de la cláusula penal cuando hay cumplimiento parcial de la obligación, pues el supuesto de hecho de la moderación judicial es el cumplimiento parcial o irregular, porque así resulta de lo previsto en el art. 1154 del Código Civil español. Por ello, cuando las partes pactan una pena es para indemnizar el incumplimiento total, y no procederá la moderación cuando la pena se estipuló para indemnizar el cumplimiento parcial o defectuoso. Además, según la jurisprudencia más reciente, procede la moderación de la pena en los casos de incumplimiento parcial del contrato con cláusula penal prevista para el caso de incumplimiento total del resto del precio pendiente de pago en los contratos de compraventa. Además, el Tribunal Supremo español ha descartado que el art. 1154 CC sea aplicable a los supuestos de pena moratoria.
Pobreza cero: la metodología de las promesas rotas
Authors: Zack Guido , Favata Federico , Fares Florencia
Published: September 2019

En 2016 el INDEC volvió a difundir los datos de pobreza e indigencia de la Argentina; luego de haberlos interrumpido en 2013 por resultar estos muy alejados de la realidad. El instituto de estadística implementó también una actualización metodológica que hace a las nuevas series no comparables en relación a las anteriores. En este artículo se detallan todas las modificaciones realizadas y se muestra su impacto marginal y total en las tasas y en las brechas de pobreza e indigencia. Asimismo, a partir de los datos del segundo trimestre de 2016, se evalúan las combinaciones de crecimiento y mejora en la distribución del ingreso necesarias para la eliminación de la pobreza y/o la indigencia para finales de 2019 y 2023.
Knowledge about family and school contributions in academic achievement-The context of schooling and social representations in India
Authors: Sinha Chetan
Published: August 2019

The
present paper seeks to identify the social representations of the family and
school contribution in students’ academic achievement. Earlier studies have
taken family and school contribution in terms of taken for granted causal
factors but how they are embedded in our everyday understanding and
interactions may provide an alternative perspective. The qualitative
methodology of content and correspondence analysis of categorical data derived
from interviews and written responses from parents, teachers and students are
utilized. It is discussed that family and school contributions are not just
representations as portrayed in the dominant theories but its notions depend
upon the identities and roles people are conscious. However, people think in a
context which may further have shaped by the interaction patterns, so, social
representations becomes not some stagnant appropriations but crosses the
boundaries of mainstream understanding. Thus family and school contributions
comprise multidimensional pictures and diversified meanings which are not
particularly dependent upon the given or generally expected notions of family
and school contributions to academic achievement.
TEKNIK DAN MODEL PERENCANAAN PENDIDIKAN
Authors: Nurhasanah Nurhasanah
Published: August 2019

Perencanaan pendidikan adalah suatu proses menetapkan keputusan yang berkaitan dengan tujuan yang akan dicapai, sumber sumber yang akan diberdayakan, dan teknik atau metode akan dipilih secara tepat untuk melaksanakan tindakan selama kurun waktu tertentu agar penyelenggaraan pendidikan dapat dilaksanakan secara efektif, efisien dan bermutu. Depdikbud (1982), mengemukakan langkah-langkah yang ditempuh dalam proses penyususnan perencanaan pendidikan yaitu: (a) pengumpulan dan pengolahan data, (b) diagnosis, (c) perumusan kebijakan, (d) perkiraan kebutuhan masa depan, (e) perhtungan biaya, (f) penetapan sasaran, (g) perumsan rencana, (h) perincian rencana, (i) implementasi rencana, (j) evaluasi rencana, dan (k) revisi rencana. Dengan adanya langkah-langkah perencanaan pendidikan tersebut diharapkan pendidikan di Indonesia akan semakin maju. Masalah pendidikan di Indonesia seakan menjadi masalah pula untuk pemerintah dalam merencanakan Sistem Pendidikan Nasional. Sistem Pendidikan Nasional selama ini seakan belum meng-cover tujuan pendidikan nasional. Tujuan pendidikan nasional begitu mulia, tetapi implementasinya tidak sanggup mewujudkannya. Perencanaan sistem pendidikan ini akan sesuai dengan tujuan pendidikan nasional, apabila masalah dalam pendidikan yang telah dibahas dapat teratasi.
ANALISIS PERSEPSI KONSUMEN TERHADAP MEREK “MAJALAH EKSEKUTIF” DIKAITKAN DENGAN KEPUASAN PELANGGAN
Authors: Suprapta
Published: September 2019

The study focuses on the consumers’ perception on the brand of Majalah Eksekutif related to the consumers’ satisfaction. Respondents taken in this study live in Jakarta. One of the reasons why consumers buy that magazine product is the image (brand). Most of the respondents suggest that the magazine is attractive, and the contents of the Majalah Eksekutif plays the crucial role to attract the consumers.
Implicit Statistical Learning across Modalities and its Relationship with Reading in Childhood
Authors: Pavlidou Elpis V. , Bogaerts Louisa
Published: August 2019

Implicit statistical learning (ISL) describes our ability to tacitly pick up regularities from our environment therefore, shaping our behavior. A broad understanding of ISL incorporates a great range of possible computations, which render it highly relevant to reading. In the light of this hypothesized relationship, ISL performance was explored in young (M = 8.47 years) typical readers (N=31) across 3 different modalities (i.e. visual, auditory and tactile) using the Artificial Grammar Learning (AGL) paradigm. Adopting repeated measures and correlational designs, the obtained data revealed modality constraints: (1) above-chance performance was observed on the visual and tactile tasks but not on the auditory task, (2) there was no significant correlation of ISL performance across modalities and (3) split-half reliability of visual and auditory tasks was reasonably high, yet for the tactile task it was close to zero. Evaluating the relation between ISL ability and language skills, we observed a positive correlation between visual ISL performance and phonological awareness. We discuss these findings in view of current perspectives on the nature of ISL and its potential involvement in mastering successful (i.e. accurate and fluent) reading.
Brain electrical activity during bench press weight training exercise
Authors: Engchuan Pipat , Wongsuphasawat Karnt , Sittiprapaporn Phakkharawat
Published: September 2019

Background: Weight training is one type of exercises which some people interest. When the body has a physical exercise with enough intensity, it can produce a positive effect on brain function by changing amplitude of electroencephalographic activity.
Aims and Objective: The purpose of this investigation was to examine a more comprehensive range of the electroencephalographic activity including delta, theta, alpha, beta, and gamma brainwaves during bench press weight training exercise.
Materials and Methods: Electroencephalographic activities were recorded with nine participants by using the commercial lightweight electroencephalographic device, NeuroSky Mindwave Mobile, both before and during bench press weight training exercise.
Results: The present study was conducted to find out how bench press weight training exercise effected to human brainwave. The electroencephalographic activity could be recorded during bench press weight training. The findings of the present study documented increase in beta and gamma brainwaves during bench press weight training exercise. This electrophysiological changes could represent the rearrangement of different systems as a consequence of exercise.
Conclusion: This bench press weight training might significantly alter the intense exercise. Future studies may want to examine how these changes in electroencephalographic activity influence or are associated with changes in cognition, affect and/or perception during/after bench press weight training exercise. The impact of peripheral physiology on electroencephalographic activity of bench press weight training exercise also needs to be examined.
Study of abnormal umbilical artery doppler and neonatal outcome
Authors: Merina Gyawali , Ramesh Poudel
Published: September 2019

Background: Doppler provides assessment of uteroplacental and fetoplacental circulation during pregnancy. It is a sensitive tool in early detection of fetal compromise and allows needful intervention.
Aims and Objective: To study the role of umbilical artery doppler in clinically suspected IUGR and its implication on neonatal outcome.
Materials and Methods: A total of 104 singleton pregnancies with gestational age of more than 34 weeks who had clinical suspicion of IUGR were evaluated using obstetric ultrasound and doppler. Umbilical arteryvelocimetry with S/D >3 and RI >0.7 were considered abnormal. Newborns were classified as either small for gestational age (SGA) ie, IUGR or appropriate for gestational age (AGA). Neonatal outcome were classified as either normal or adverse events that included still birth, NICU admissions, perinatal asphyxia and/or neonatal death.
Results: Out of 104 clinically suspected IUGR, 55 were born with small for gestational age. Among these SGA neonates, 45 subjects had abnormal umbilical artery S/D and 42 had abnormal RI. Abnormal umbilicalartery S/D ratio had a sensitivity of 81.8 %, specificity of 59.2 %, the positive predictive value of 69.2 % and negative predictive value of 74.4 %. Abnormal Umbilical artery RI had a sensitivity of 76.4 %, specificity of 69.4 %, positive predictive value of 73.7 % and negative predictive value of 72.3 % in diagnosing IUGR. Abnormal umbilical artery velocimetry was associated with increased morbidity and mortality in IUGR neonates.
Conclusions: Umbilical artery doppler plays an important role in diagnosing IUGR and predicting neonatal outcome.
Structural and optical characterization of the crystalline phase transformation of electrospinning TiO2 nanofibres by high-temperatures annealing
Authors: Secundino-Sánchez O. , Diaz-Reyes J. , Sánchez-Ramírez J. F. , Jiménez-Pérez And J.L.
Published: September 2019

The electrospinning technique has been used to synthesize TiO2 nanofibres, which by annealing at high temperatures in a wide range achieves the crystal phase transformation of anatase to rutile passing through the anatase+rutile mixed. The investigated temperature range was 0-1000°C. The TiO2 nanofibres chemical stoichiometry and surface morphology were obtained by Scanning Electron Microscopy and Energy Dispersive Spectrometry. The nanofibres diameter was ranged from 137.0 to 115.3 nm in the annealing temperature interval of 0-1000°C. The influence of the annealing temperature on the structure and crystal phase quality of the TiO2crystal has been investigated by X-ray diffraction and Raman scattering. Clear evidence of nanofibres structural transformation from pure anatase to pure rutile structures, including the quasi-amorphous and anatase+rutile mixed phases has been confirmed by Raman scattering. By X-ray diffraction was found that the nanofibres crystalline phases present as preferential growth direction (101) for anatase and (110) for rutile. The Raman spectroscopy exhibits the anomalous behaviour for band broadening and shifting of Raman bands with increasing crystallite size that form the nanofibres. The room-temperature photoluminescence presents radiative bands whose main band redshifts, from 2.56 to 1.32 eV, as the crystalline phase transforms in the investigated annealing temperature range.
Superintendents as Collaborative Learners in Communities of Practice: A Sociocultural Perspective on Professional Learning
Authors: Bredeson Paul V. , Klar Hans W. , Johansson Olof
Published: August 2019

This cross-national empirical study examines superintendents’ professional learning and leadership in Sweden and the United States. Based on a sociocultural perspective, the study highlights the superintendents’ preferences for collaborative forms of learning for enhancing their professional knowledge and for building organizational capacity. Findings from the study underscore the importance of professional work as the primary opportunity to develop professional knowledge and practice, as well as the potential of collaborative forms of learning to create shared meaning and strengthen organizational capacity.
Community Cultural Wealth and Chicano/Latino Students
Authors: Valdez Trina M. , Lugg Catherine
Published: August 2019

This article offers a vision of how educators can better foster the various forms of knowledge and wealth that Chicano/Latino students bring to their public schools. By using LatCrit (i.e., Latino/a critical race theory) to conceptualize community cultural wealth, we hope to give educational leaders greater insights into culturally appropriate strategies in serving all public school students. Yosso (2005) defined community cultural wealth as “an array of knowledges, skills, abilities and contacts possessed and used by Communities of Color to survive and resist racism and other forms of oppression” (p. 154). Employing a LatCrit lens allows us to take an in-depth look into how schools can better relate to communities of color. We are “conceptualizing community cultural wealth as a critical race theory challenge to traditional interpretations of cultural capital and then offering suggestions on how community cultural wealth can ‘transform the process of schooling’” (Yosso, 2005, p. 70). Cultural wealth sees communities of color as “holders and creators of knowledge” (Delgado-Bernal, 2002, p. 106) in an educational system that, we believe, sees students of color as being deficient and lacking critical knowledge. Furthermore, school and community relations is a topic that has been placed at the top of many educators’ lists, and we believe rightly so. Therefore, this article reexamines how schools can better relate and communicate with communities of color—particularly, Chicana/os and Latina/os—to increase these students’ educational and academic acumen in U.S. public schools.
Parent-School Councils in Beijing, China
Authors: Lewis Wayne D. , Björk Lars G. , Zhao Yuru , Chi Bin
Published: August 2019

This exploratory study examines how schools in Beijing have responded to a Chinese national policy mandate to establish and maintain parent councils. We surveyed principals and parent council members across schools in the Beijing municipality about the establishment and functions of their schools’ parent councils. Survey results provide insights into who comprises parent councils in Beijing schools, what parent councils’ primary functions have been, how parent council members and principals perceive the value of parent councils, and the working relationships between parent councils and school principals.
Medical Surprise Anticipation and Recognition Capability: A New Concept for Better Health Care
Authors: Laurencin Cato T. , McClinton Aneesah
Published: August 2019

Predicting and preparing for the unforeseen is challenging. Medicine and health care are continuously changing based on science, technology, and regulation. This very process of change creates pathways for surprise and leaves us vulnerable to its impact. The armed forces have established strategies to identify and address surprising events, a framework that can be adapted to benefit the medical community. We introduce Medical Surprise Anticipation and Recognition Capability (SARC), adapted from an established military strategy. SARC is the process of addressing surprising events before they emerge. We explore the framework for mitigating surprise as developed by the Committee on Capability Surprise on U.S. Naval Forces. We recommend further exploration of this concept in health care as a potential asset in our quest towards high reliability.