bluuebunny/crossref_metadata_2025 huggingface dataset:
Extended Interfacial Stability Through Simple Acid Rinsing in a Li-Rich Oxide Cathode Material
Authors: Ramakrishnan Srinivasan , Park Byungchun , Wu Jue , Yang Wanli , McCloskey Bryan D.
Published: October 2019

Layered Li-rich Ni, Mn, Co (NMC) oxide cathodes in Li-ion batteries provide high specific capacities (>250 mAh/g) via O-redox at high voltages. However, associated high-voltage interfacial degradation processes require strategies for effective electrode surface passivation. Here, we show that an acidic surface treatment of a Li-rich NMC layered oxide cathode material leads to a substantial suppression of CO2 and O2 evolution, ~90% and ~100% respectively, during the first charge up to 4.8 V vs. Li+/0. CO2 suppression is related to Li2CO3 removal as well as effective surface passivation against electrolyte degradation. This treatment does not result in any loss of discharge capacity and provides superior long-term cycling and rate performance compared to as-received, untreated materials. We also quantify the extent of lattice oxygen participation in charge compensation (“O-redox”) during Li+ removal by a novel ex-situ acid titration. Our results indicate that the peroxo-like species resulting from O-redox originate on the surface at least 300 mV earlier than the activation plateau region around 4.5 V. X-ray photoelectron spectra and Mn-L X-ray absorption spectra of the cathode powders reveal a Li+ deficiency and a partial reduction of Mn ions on the surface of the acid-treated material. More interestingly, although the irreversible oxygen evolution is greatly suppressed through the surface treatment, our O K-edge resonant inelastic X-ray scattering shows the lattice O-redox behavior largely sustained. The acidic treatment, therefore, only optimizes the surface of the Li-rich material and almost eliminates the irreversible gas evolution, leading to improved cycling and rate performance. This work therefore presents a simple yet effective approach to passivate cathode surfaces against interfacial instabilities during high-voltage battery operation.
Hypoxia-Activated Pro-Drugs of the KDAC Inhibitor Vorinostat (SAHA)
Authors: Calder Ewen D. D. , Skwarska Anna , Mistry Ishna N. , Sneddon Deborah , Conway Stuart , Hammond Ester M.
Published: October 2019

Hypoxia (lower than normal oxygen) is a characteristic of most solid tumours that results in poor cancer patient prognosis. The difference in cellular environment between normoxia (21% oxygen) or physoxia (4.5-7% oxygen) and hypoxia (<2.0% oxygen) causes increased resistance to radio- and chemotherapy, but also provides the opportunity to selectively release hypoxia-activated pro-drugs. This approach potentially allows targeting of chemotherapies, including lysine deacetylase (KDAC) inhibitors, to the hypoxic fraction of cells. Here, we report initial work on the development of KDAC inhibitors that are selectively released in hypoxic conditions. We have shown that the addition of a 4-nitrobenzyl (NB) or 1-methyl-2-nitroimidazole (NI) bioreductive group onto the hydroxamic acid moiety of SAHA, giving NB-SAHA and NI-SAHA, abolishes KDAC inhibition activity. Both NB-SAHA and NI-SAHA undergo enzyme-mediated bioreduction, in a hypoxia-dependent manner, to release SAHA selectively in <0.1% oxygen. This work provides an important foundation for further investigations into the targeted release of KDAC inhibitors in hypoxic tumours.
An Activity-Based Methionine Bioconjugation Approach to Developing Proximity-Activated Imaging Reporters
Authors: Ohata Jun , Krishnamoorthy Lakshmi , Gonzalez Monica , Xiao Tong , Iovan Diana , Toste F. Dean , Miller Evan , Chang Christopher
Published: October 2019

Chemical probes that report on protein activity, rather than protein abundance, with spatial and temporal resolution can enable studies of their native function in biological contexts as well as provide opportunities for developing new types of biochemical reporters. Here we present a sensing platform, termed proximity-activated imaging reporter (PAIR), which combines activity-based methionine bioconjugation and antibody labeling with proximity-dependent oligonucleotide-based amplification to monitor dynamic changes of a given analyte in cells and animals through context-dependent methionine labeling of specific protein targets. We establish this PAIR method to develop sensors for imaging reactive oxygen species (ROS) and calcium ions through oxaziridine-directed labeling of reactive methionine residues on β-actin and calmodulin (CaM), respectively, where the extent of methionine bioconjugation on these protein targets can serve as an indicator of oxidative stress or calcium status. In particular, application of PAIR to activity-based CaM detection provides a method for imaging integrated calcium activity in both in vitro cell and in vivo zebrafish models. By relying on native protein biochemistry, PAIR enables redox and metal imaging without introduction of external small-molecules or genetically encoded indicators that can potentially buffer the natural/existing pools. This approach can be potentially generalized to target a broader range of analytes by pairing appropriate activity-based protein probes with protein detection reagents in a proximity-driven manner, providing a starting point not only for designing new sensors but also for monitoring endogenous activity of specific protein targets in biological specimens with spatial and temporal fidelity.
Influence of Amylose Size on the Structure and NMR Spectrum of Amylose-Palmitic Acid Complexes. Insight from Classical Molecular Dynamics Simulations and DFT Quantum Chemical Computations.
Authors: Schahl Adrien , Réat Valérie , jolibois franck
Published: October 2019

We present, first, structural analysis of small sized amyloses complexed to palmitic acid studied using classical molecular dynamics. We show that even if amylose with a minimum of 11 residues exhibits transitional appearance of a V-type structure, 15 glucoses residues are necessary for the amylose to fold around the palmitic acid in a well-established helix conformation. Second, simulating 13C NMR spectrum using a strategy that combines molecular dynamics and quantum chemical DFT calculations, we demonstrate that part of the NMR spectrum is affected by the amylose size and by the presence of specific intramolecular hydrogen bonds. By mean of deconvolution procedure of NMR spectra of a 19-residues amylose calculated using a series of structures extracted from molecular dynamics, we have been able to precise the attribution of each characteristic resonances. In this context, we postulate that one chemical shift that is usually attributed to a specific carbon can, also, correspond to the presence of two different local conformations of amylose.
Autonomous Discovery of Materials for Intercalation Electrodes
Authors: Bölle Felix Tim , Mathiesen Nicolai Rask , Nielsen Alexander Juul , Vegge Tejs , García Lastra Juan Maria , Castelli Ivano E.
Published: October 2019

The development of automated computational tools is required to accelerate the discovery of novel battery

materials. In this work, we design and implement a workflow, in the framework of Density Functional

Theory, which autonomously identifies materials to be used as intercalation electrodes in batteries, based

on descriptors like adsorption energies and diffusion barriers. A substantial acceleration for the calculations

of the kinetic properties is obtained due to a recent implementation of the Nudged Elastic Bands (NEB)

method, which takes into consideration the symmetries of the system to reduce the number of images to

calculate. We have applied this workflow to discover new cathode materials for Mg-ion batteries, where

two of these materials display a threefold increase in the potential of the Chevrel phase, the state-of-the-art

cathode in Mg-ion batteries.
An Autonomous Electrochemical Test stand for Machine Learning Informed Electrolyte Optimization
Authors: Whitacre Jay , Mitchell Jared , Dave Adarsh , Burke Sven , Viswanathan Venkatasubramanian
Published: October 2019

A fully automated, computer-controlled test stand capable of rapidly creating and electrochemically characterizing any arbitrary liquid electrolyte solution is described. Hundreds of different electrolytes were studied, and the results were used to verify the precision and accuracy of the system. To test the functionality of the approach, several 2-dimensional co-solvated electrolyte solutions containing blends of aqueous sulfates and nitrates were rapidly created and examined automatically. The test stand took less than a day to conduct these searches, while conventional manual methods would have taken much longer. The demonstrated standard error of the test-stand was 0.5 mS/cm on conductivity and 0.02 V for voltage stability window measurements, and several of the combinations studied revealing surprisingly high voltage stability and conductivity values. The demonstrated success of the test-stand in a 2-dimensional search spaces shows the promise of conducting high speed co-optimization studies of liquid electrolytes in particular when used in concert with a machine learning-based real time/in-loop data assessment computational package.
Electrochemical Reduction of Homo– and Hetero–tri(aryl)borohydrides
Authors: Blagg Robin , Lawrence Elliot , Wildgoose Gregory
Published: October 2019

Authentic terminal homo– and hetero–tri(aryl)borohydrides of the form [HB(C6F5)x{m,m–(CF3)2C6H3}y(C6Cl5)z]− have been synthesised by reaction of their parent borane with a hydride source; their electrochemical properties have been studied, together with a computational investigation using density functional theory (DFT). The three of these compounds incorporating at least two pentachlorophenyl rings have been identified as, upon electrochemical oxidation, regenerating their parent borane, one of the essential steps (together with rapid cleavage under mild conditions of H2 together with an appropriate Lewis base), in implementing the electrochemically coupled – frustrated Lewis pair concept. The resulting mechanism upon oxidation is supported by modelling the cyclic voltammetry data obtained. The DFT studies have allowed for the structures of these compounds to be assessed, along with quantifying their hydride ion affinities (HIAs).
Electrochemical Vicinal Difluorination of Alkenes: Sustainable, Scalable, and Amenable to Electron-rich Substrates
Authors: Doobary Sayad , Sedikides Alexi , caldora Henry , poole Darren , Lennox Alastair
Published: October 2019

Fluorinated alkyl groups are important motifs in bioactive compounds, positively influencing pharmacokinetics, potency and F conformation. The oxidative difluorination of alkenes represents an H important strategy for their preparation, yet current methods are limited in their alkene-types and tolerance of electron-rich, readily oxidized functionalities, as well as in their scalability. Herein, we report a method for the difluorination of a number of unactivated alkene-types that is tolerant of electron-rich functionality, giving products that are otherwise unattainable. Key to success is the electrochemical generation of a hypervalent iodine mediator (in the presence of nucleophilic fluoride and HFIP) using an ‘ex-cell’ approach, which avoids the oxidative decomposition of the substrate. The more sustainable conditions give good to excellent yields of product in up to decagram scales
Assessment of Dynamic Structural Instabilities Across 24 Cubic Inorganic Halide Perovskites
Authors: Yang Ruo Xi , Skelton Jonathan , Da Silva E Lora , Frost Jarvist Moore , Walsh Aron
Published: October 2019

Metal halide perovskites are promising candidates for next-generation photovoltaic and optoelectronic applications. The flexible nature of the octahedral network introduces complexity when understanding their physical behavior. It has been shown that these materials are prone to decomposition, phase competition, and the local crystal structure often deviates from the average space group symmetry. To make stable phase-pure perovskites, understanding their structure-composition relations is of central importance. We demonstrate, from lattice dynamics calculations, that the 24 inorganic perovskites ABX3 (A = Cs, Rb; B = Ge, Sn, Pb; X = F, Cl, Br, I) exhibit instabilities in their cubic phase. These instabilities include cation displacements, octahedral tilting, and Jahn-Teller distortions. The magnitudes of the instabilities vary depending on the chemical identity and ionic radii of the composition. The tilting instabilities are energetically dominant, and reduce as the tolerance factor increases, whereas cation displacements and Jahn-Teller type distortions depend on the interactions between the constituent ions. We further considered representative tetragonal, orthorhombic and monoclinic perovskites phases to obtain phonon-stable phases for each composition. This work provides insights into the thermodynamic driving force of the instabilities and will help guide synthesis in material screening.
Kinetic study, optimization and comparison of sun drying and superheated steam drying of asam gelugor (Garcinia cambogia)
Authors: Lim G.W. , Jafarzadeh S. , M.R. Norazatul Hanim
Published: October 2019

The purposes of present study are to compare the kinetic drying of the G. cambogia
through sun drying and superheated steam drying (SSD) method and optimizing the
quality of SSD of it through response surface methodology. G. cambogia fruit rinds were
dried at temperature of 150°C, 200°C and 250°C. The drying curves were fitted into the
mathematical model of Page, Lewis and Henderson-Pabis models. Page model was found
to be the best in describing the drying behavior of G. cambogia. Drying rate constant (k)
increased as temperature increased and SSD method had overall higher drying rates
ranged from 5.929 x 10-5 to 5.861 x 10-4 min-1
than sun drying method which was 4.980 x
10-6 min-1
. Total acid number showed a trend of increased followed by decreased over
drying time. superheated steam drying process of G. cambogia fruit rinds was optimized
by using response surface methodology employing a central composite design. Drying
time and temperature were the factors in optimization while moisture content (wet basis),
acid number and lightness (*L) were the response parameters. Experimental results were
fitted to a second-order polynomial model and the model fitness and optimal drying
condition were determined by regression analysis and analysis of variance. The optimal
conditions for superheated steam drying of G. cambogia fruit rinds were identified as
46.60 mins and 150°C with the composite desirability of 0.913. Application of
superheated steam drying under controlled conditions resulted in faster drying process and
better quality of dried G. cambogia than conventional sun drying technique.
PERANAN GURU PEMBIMBING KHUSUS LULUSAN NON-PENDIDIKAN LUAR BIASA (PLB) TERHADAP PELAYANAN ANAK BERKEBUTUHAN KHUSUS DI SEKOLAH INKLUSI KABUPATEN LUMAJANG
Authors: Wardah Erika Yunia
Published: October 2019

Abstrak Pendidikan inklusif merupakan pendidikan yang memberikan kesempatan yang sama pada peserta didik baik yang memiliki kelainan mental ataupun fisik untuk belajar bersama dengan teman seusianya di sekolah regular. Pendidikan inklusif memiliki tujuan untuk mengurangi sikap diskriminatif pada anak berkebutuhan khusus. Peranan seorang guru pembimbing khusus sangat diperlukan dalam mengoptimalkan perkembangan anak secara akademik maupun non akademik. Guru pembimbing khusus bukan semata-mata mendampingi anak dalam belajar melainkan juga memberikan pelayanan yang sesuai dengan kebutuhannya. Terselenggaranya sekolah inklusif di kabupaten Lumajang memunculkan suatu isu di masyarakat mengenai kemampuan guru pembimbing khusus dalam memberikan pelayanan bagi anak berkebutuhan khusus yang notabenenya bukanlah dari lulusan Sarjana Pendidikan Luar Biasa.   Penelitian ini menggunakan metode deskriptif kualitatif dengan mengungkapkan kejadian secara mendalam dan terfokus pada kejadian yang ditemukan secara alami. Sumber data pada penelitian ini diperoleh dari guru pembimbing khusus, kepala sekolah dan koordinator bagian sekolah inklusif di Dinas Pendidikan Kabupaten Lumajang. Sehingga data yang ditemukan berupa data deskriptif hasil wawancara, observasi dan dokumentasi terkait dengan fokus penelitian. Melalui metode penelitian kualitatif didapatkan hasil penelitian sebagai berikut: (1) Dalam suatu lingkung sekolah Inklusif Guru Pembimbing Khusus bukanlah lulusan Sarjana Pendidikan Luar Biasa, melainkan lulusan Pendidikan Bahasa Indonesia, Matematika, Olahraga, Sains, PGSD. Mereka adalah guru kelas ataupun guru matapelajaran yang ditunjuk oleh kepala sekolah untuk menjadi Guru Pembimbing Khusus di instansi tersebut. (2) Perencanaan pelayanan bagi anak berkebutuhan khusus masih belum berjalan dengan baik, terutama dalam perencanaan program kekhususan bagi anak berkebutuhan khusus. (3) Pelayanan bagi anak berkebutuhan khusus tidak dapat berjalan dengan efektif dikarenakan minimnya pengetahuan guru pembimbing khusus non-PLB tentang anak berkebutuhan khusus. (4) Dinas Pendidikan Kabupaten Lumajang telah mengupayakan pelatihan untuk guru pembimbing khusus non-PLB tentang program inklusif dan pelayanan bagi anak berkebutuhan khusus. Kata Kunci: Guru Pembimbing Khusus, Sekolah Inklusi, Anak Berkebutuhan Khusus.
Pemahaman Siswa SMP Perempuan Berkemampuan Rendah pada Masalah Kalimat Matematika
Authors: Listiawati Enny
Published: October 2019

Abstrak.Fokus masalah dalam penelitian ini adalah pemahaman siswa SMP pada masalah kalimat matematika karena hal ini sangat penting dan mempengaruhi kemampuan siswa dalam memecahkan masalah kalimat matematika. Adapun tujuan penelitan ini adalah untuk mendeskripsikan pemahaman siswa SMP perempuan dengan kemampuan matematika rendah pada masalah kalimat matematika. Subjek penelitian ini adalah satu orang siswa SMP perempuan kelas VIII yang mempunyai kemampuan matematika rendah. Instrumen penelitian ini adalah peneliti sendiri dengan instrumen pendukung yaitu soal tes kemampuan matematika, soal tes pemahaman pada kalimat matematika dan pedoman wawancara. Hasil penelitian yang diperoleh adalah bahwa pemahaman subjek perempuan pada masalah kalimat matematika yaitu pada komponen pemahaman interpreting subjek menginterpretasi masalah tersebut dengan menggunakan kalimat sendiri secara lengkap. Sedangkan pada komponen pemahaman summarizing subjek tidak menyatakan kalimat matematika dengan menggunakan notasi matematika akan tetapi dengan menggunakan kata-kata. Pada komponen pemahaman inferring subjek menyelesaikan masalah kalimat matematika secara terperinci dengan menggunakan perhitungan perkalian yang dituliskan secara lengkap dan subjek menyimpulkan jawaban sesuai dengan pertanyaan yang diajukan pada masalah kalimat matematika. Pada komponen pemahaman explaining subjek menjelaskan setiap langkah penyelesaiannya secara rinci serta menuliskannya pada hasil pekerjaanya.Abstract.The focus of the problem in this study is an understanding of junior high school students in mathemarical word problem because it is very important and affects the student's ability in solving mathematical problems sentences. The purpose of this research is to describe the understanding of female junior high school students with low mathematic competence in mathematical word problem. The subjects were a junior high students of class VIII women who have low mathematic competence. The instrument of this study is the researchers themselves with instruments that support mathematic competence test questions, test questions on sentence comprehension of mathematics and interview guidelines. The results obtained is that the understanding of the subject matter of women in mathematical word is on understanding components of interpreting the subject interpret these problems by using their own sentences in full. While on the subject summarizing understanding of the components do not declare the sentence mathematics using mathematical notation but by using words. On the subject component inferring understanding solve problems detailed mathematical sentence using the multiplication calculation is written in full and in accordance with the subject concludes answers to questions on the issue of mathematical sentence. In the component of understanding explaining the subject to explain each step of the solution in detail and write it on the results of his work.
Pemetaan Fungsi Kognitif Siswa SMP DENGAN Menggunakan Feuerstein’s Instrumental Enrichment
Authors: Amirudin Mochammad , Amalina Ijtihadi Kamilia
Published: October 2019

Berpikir merupakan kegiatan yang paling utama ketika melakukan suatu hal. Berpikir selalu melibatkan kognitif. Penggunaan kognitif secara maksimal tentu melibatkan kehadiran dari fungsi kognitif. Kehadiran fungsi kognitif seseorang dalam menyelesaikan permasalahan matematika mengakibatkan berkembangnya fungsi kognitif seseorang tersebut. Penelitian ini merupakan penelitian deskriptif yang bertujuan untuk mendeskripsikan hasil pemetaan fungsi kognitif dan kemampuan matematika siswa. Subjek penelitian ini adalah siswa SMP kelas VIII sebanyak 32 siswa (15 laki-laki dan 17 perempuan). Data dikumpulkan dengan menggunakan metode tes dan wawancara. Instrumen yang digunakan dalam penelitian ini adalah instrument tes Feuersteins’s Instrumental Enrichment (FIE) (pengorganisasian titik, pengelompokan, dan progress numeral) dan instrumen tes matematika. Hasil penelitian menunjukkan bahwa peta fungsi kognitif dan kemampuan matematika siswa dengan menggunakan FIE jenis Pengorganisasian Titik menunjukkan bahwa, sebanyak 32 subjek terbagi menjadi sebesar 18,75% termasuk dalam kemampuan matematika tinggi, sebesar 71,875% termasuk dalam kemampuan matematika sedang, dan sebesar 9,375% termasuk dalam kemampuan matematika rendah. Untuk Jenis Pengelompokan menunjukkan bahwa masingmasing sebesar 6,25% pada fungsi kognitif yang pertama dan kedua, termasuk dalam kemampuan matematika rendah. pada fungsi kognitif yang ketiga terdapat 6,25% termasuk dalam kemampuan matematika tinggi, 3,125% termasuk dalam kemampuan matematika sedang, dan 78,125% termasuk dalam kemampuan matematika rendah. Sedangkan pada jenis Numerical Progression menunjukkan bahwa pada fungsi kognitif yang pertama sebesar 18,75% termasuk dalam kemampuan matematika rendah. sedangkan pada fungsi kognitif yang kedua sebesar 59,375% termasuk dalam kemampuan matematika tinggi, sebesar 3,125% termasuk dalam kemampuan matematika sedang, dan sebesar 18,75% termasuk dalam kemampuan matematika rendah
Students’ Combinatorial Thinking Processes in Solving Mathematics Problem
Authors: Uripno Gusti , Rosyidi Abdul Haris
Published: October 2019

Combinatorial thinking is a way of thinking in solving combinatory problems. Combinatory problems are one of the difficult problems for students to solve. This study aims to analyses students’ combinatorial thinking processes in solving problems. Given two combinatory problems that consist of problems with multiplication rule and combination. The Problems were given to two 11th grade senior-high school students. The results obtained were that there was a tendency for male Participants to do the two different ways which are direct counting and using diagram. The female participants did the work with one way which is direct counting. On more complex issues, namely about combination, students' thinking models go through stages of set of outcomes. From this research, it is expected that combinatory material learning is emphasized on the discovery of formulas by students themselves inductively, especially deductively. So that in this case the students interpret the combinatory formula more.
Analisis Kesalahan Mahasiswa dalam Pembuktian Transformasi Geometri
Authors: Maifa Talisadika Serrisanti
Published: October 2019

Tujuan penelitian ini adalah untuk mengetahui kesalahan apa saja yang dilakukan mahasiswa dalam membuktikan sebuah pemetaan merupakan transformasi geometri. Subjek penelitian adalah mahasiswa kelas Geometri Transformasi pada Program Studi Pendidikan Matematika Universitas Timor. Penelitian ini merupakan penelitian deskriptif kualitatif. Adapun tekhnik pengumpulan data yang digunakan adalah, observasi, tes, dan wawancara. Berdasarkan hasil penelitian diperoleh bahwa jenis kesalahan yang dilakukan mahasiswa adalah (1) Kesalahan dalam menginterpretasi definisi dari sebuah pemetaan, (2) Kesalahan dalam menentukan daerah asal dan daerah hasil sebuah pemetaan dan (3) Kesalahan dalam menentukan 2 hal yang kontradiksi dalam membuktikan sebuah pemetaan merupakan fungsi injektif.
Metodologias para o ensino de geografia física
Authors: Louzada Camila De Oliveira , Frota Filho Armando Brito
Published: October 2019

Uma das principais dificuldades dos alunos de Ensino Fundamental (1° a 9° Ano) e Ensino Médio (1° a 3° Ano) nas instituições de ensino do Brasil é a assimilação dos conteúdos de Geografia Física apresentados nos livros didáticos de Geografia. Dentre as metodologias a serem apresentadas, a primeira delas é o Reálias que consiste em apresentar conjunto de objetos que representem um conteúdo, propiciando a associação entre este objeto com o tema a ser estudo, outra metodologia e recurso didático é o Terrário, que consiste na reprodução integral de um ecossistema em miniatura dentro de objetos. E como uma terceira alternativa, que envolve a relação entre teórico e a práxis é a utilização do Trabalho de Campo devido a sua importância para a visualização das dinâmicas socioambientais in loco. Outra metodologia é o Estudo do Meio, que permite ao aluno relacionar os conteúdos estudados com os fenômenos relacionados com o cotidiano dos mesmos. Como quinta, alternativa apresentará a metodologia dos Mapas Mentais, que são representações através de desenhos, da percepção dos lugares vividos por parte dos entrevistados. Visando propiciar um conjunto de ferramentas metodológicas para auxiliar professores e alunos no ensino e aprendizagem dos conteúdos de geografia física.
Desafios e contribuições da aula de campo em escola pública de altamira-pará
Authors: Braga Keslen Da Costa , De Oliveira Bruno Santos , Morais Enoque Gomes de
Published: October 2019

O presente trabalho aborda a aula de campo como proposta metodológica no ensino da Geografia, e seus desafios e contribuição no ensino fundamental, em uma escola municipal de Altamira-PA, com objetivo de discutir sobre a aula de campo, sua importância principalmente no ensino de Geografia, seus desafios e suas contribuições para o desenvolvimento do conhecimento dos alunos, bem como apresentar experiência vivenciada em campo e em sala de aula. Foi realizado levantamento de dados através de aplicação de questionários, suscitando a necessidade, a importância da aula de campo e a aplicabilidade da pratica em campo, com intuito de analisar a relação teoria-pratica. Essa pesquisa ocorreu referida a unidade de ensino com a turma do 6º ano C, composto por aula teórica, aula em campo e discussões em campo. A aula de campo contribuiu para que os alunos tenha uma real aprendizagem por parte da assimilação do conteúdo ministrado em sala, havendo um elo essencial entre a prática e a teoria.
Students’ and teachers’ perceptions of Moxtra as an online space for blended learning
Authors: Davies Renaud Jonathan
Published: October 2019

In this exploratory study, the author examines both students’ and teachers’ perceptions of Moxtra, a cross-platform cloud collaboration service, as a blended learning tool in a language course. Participants were 242 first-year students studying General English and 8 teachers at the Bunkyo English Communication Centre (becc) at Hiroshima Bunkyo Women’s University in Japan. Both students and teachers were given an iPad self-efficacy survey along with a Moxtra Perceptions and Attitudes questionnaire with student survey results being followed by principal components analysis. Findings showed positive indicators regarding the potential for Moxtra in a language learning context, not only as a tool to support blended learning, but also as a tool to support teachers in a collaborative working environment. With that said, the results also indicate that for Moxtra to reach its full potential, students need to be inculcated, nurtured and encouraged to engage fully with the application. Similarly, teachers must also be encouraged to utilize Moxtra’s many features with their students in order to benefit from all of its affordances. The study provides both curriculum developers and language instructors with insights into the adoption of Moxtra in an efl context.
THE USAGE OF ALEXANDER TECHNIQUE IN VOICE TRAINING Absract
Authors: HELVACI Ayhan
Published: October 2019

Alexander Tekniği psiko-fiziksel bir yeniden eğitim yoludur. Alışılagelen otomatik tepkileri bastırarak vücudu yanlış kullanmayı engelleyen ve daha çok güven ve rahatlık verici bir duyguyla birlikte düzgün reaksiyon kullanım yolunu
ortaya çıkarmaktadır. Bu teknik Avustralyalı bir oyuncu olan Frederick Methias Alexander tarafından 1904 yılında geliştirilmiştir. Çocukluk çağında başlayan ve yoğun stresli yaşam boyunca vücudumuzda biriken istenmeyen kas gerilimi,
çalgı çalmanın da gerektirdiği duruş sebebiyle, kontrol edilmediği takdirde boyun, sırt ağrıları, duruş bozuklukları gibi rahatsızlıkların ortaya çıkmasına sebep olabilmektedir. Alexander tekniği, müzisyenlerin çalgılarını çalarken
ya da şarkı söylerken fiziksel hareket gerektiren pasajlardaki performanslarının kalitesini yükseltmelerine yardımcı olduğu ve dünyada çok sayıda müzik okulunda ayrı bir ders olarak verildiği görülmektedir. Bu çalışmada; Alexander
tekniğinin ses eğitimi derslerinde özellikle doğru duruş, vücut rahatlığı ve doğru nefes kullanımı üzerinde durulmuştur. Çalışma sonucunda, Alexander Tekniğinin ses eğitimi derslerinde doğru duruş, vücut rahatlığı ve doğru nefesi
anlama da güçlük çeken öğrencilere anlama ve uygulama kolaylığı sağladığı ve alternatif bir sorun çözme yöntemi olarak kullanılabileceği görülmüştür.
FROM FILM TO POEM: LILI
Authors: BAYRAK Özcan , ÇELİK Mehmet
Published: October 2019

“Lili” ismi kelime anlamı itibariyle Fransızcada zambak, nâzik, lekesiz, pak ve tertemiz anlamlarına gelmektedir. Bu manasıyla şiire ve içinde bulunan karaktere uymaktadır. Bugüne kadar birçok tanımı yapılmış olan aşk Sezai Karakoç’ta maddeden ayrı olarak lekesiz, nazik, tertemizdir. Aynı zamanda yazıldığı dönem itibariyle Sezai Karakoç’un ruh dünyasının özetidir. Bu şiir bu vesileyle ortaya çıkmıştır. Sinema sanatının Muhsin Ertuğrul’un etkisinde şekillenen döneminde 1953 yapımı Lili adlı filmi izleyen şair, bu şiiri kaleme almıştır. Bu vesile ile sinema sanatının şiiri etkilemesi hususunda örnek bir çalışma ortaya koymuştur. Filmin şiirselleştirildiği edebi bir eser meydana gelmiştir. “Lili” şiiri, Sezai Karakoç’un “Mona Roza” ile başlayıp “Pinpon Topu” ile devam eden aşk şiirlerinin devamı niteliğindedir. Bu şiir şairin gençlik dönemi şiirlerindendir. Bu dönemde modern bir tavır sergileyerek evrensel değer olan aşk, şiirin öznesi olan Lili ile Sezai Karakoç’un ilişkisi, şiirin bitiş dizesidir.
THE ECONOMICAL IMPACT OF FOREIGN DIRECT INVESTMENTS AND ‘THE FOREIGN DIRECT INVESTMENTS IN TURKEY’
Authors: ÇELİK Emre
Published: October 2019

Sermayenin küreselleşmesi ile birlikte, bir firmanın ülkesinin sınırları dışında üretim yapması veya ülkesi dışındaki topraklarda üretim tesisi satın alması gibi fikirler uygulanabilirlik açısından git gide ivme kazanmıştır. Özellikle
gelişmiş ülkelerdeki firmalar tarafından gelişme yolundaki ülkelere doğru, doğrudan yabancı yatırımların akışının son yıllarda hızlanması da şirketlerin gelirlerini maksimize etme fikriyle ile ilgilidir. Gelişmekte olan ülkelerde
ekonomik kalkınma sürecindeki en önemli engellerinden birisi, ülke içindeki tasarrufların az olmasından dolayı birikimlerin yetersizliğidir. Özellikle az gelişmiş ülkelerde milli gelirin düşük olması, devletin yatırım politikalarının
azalmasına yol açar. Ödemeler bilançosundaki açıklar, işsizlik gibi durumlar karşısında doğrudan yabancı sermayenin önemi daha da arttırmaktadır. Doğrudan yabancı yatırımlar genelde çok uluslu şirketler aracılığı ile yürütülür.
Birden fazla ülkede faaliyet yürüten şirketlerin bir kaçını; Wal –Mart Stores(perakende sektörü ), Shell (petrol sektörü ), Exxon Mobil(petrol sektörü) , BP(petrol sektörü ), Toyota Motor (motorlu taşıtlar ), Sinopec (petrol ve
kimya ) olarak sayabiliriz. Bu gibi firmaların toplam satışları birçok devletin ihracatından fazla olup, uluslararası finans piyasasını da bu şirketler yönlendirir. Doğrudan yabancı sermayenin dünyada yaygınlaşması 1950’lere rastlasa
da ülkemize ciddi anlamda 2000 yılından sonra doğrudan yabancı sermaye gelmeye başlayarak, 2001 krizinde birçok banka yabancılar tarafından satın alınmış, gelen yatırımlar da telekomünikasyon başta olmak üzere özelleştirmeler yoluyla,
şirketlerin birleşmeleri ve gayrimenkul satın alımı gibi alanlarda yoğunlaşmıştır. 2018 sonu itibariyle, dünyadaki doğrudan yabancı sermayenin ancak %1 ‘ine isabet eden kısmı ülkemizde yatırım yaptığı göz önünde bulundurulursa,
son 10 yıldır doğrudan yabancı yatırımcı sayısında artış olsa da gelen sermaye ile karşılaştırıldığında birçok doğrudan yabancı yatırım çeken ülkenin gerisinde kaldığımız çalışmadaki tablolardan anlaşılacaktır.
The Effects of Organic Matter and N, P, K Fertilizer on Nutrient Uptake and Yield of Corn in Inceptisol Ternate
Authors: Rachman Idris Abd , Djuniwati Sri , Idris Komarudin
Published: October 2019

The objective oj the research was to study the effects oj organic matter and N, P, K Jertilizer on nutrients uptake andyield oj corn in Inceptisol Ternate. The design oj the research was Jactorial completely randomized block design with twoJactors. The first Jactor was the rate oj organic matter (0, 20, 40 tlha) or (B(), B, and B z) and the second Jactor was the rate oj N, P, KJertilizer (0.5; I and /.5 recommended rate) or (Flo F] and F JJ. The results oj research showed that combination oj B ,F] gave the highest amount oj the corn leave at 42 days afterplanting, the weight oj corn with husk cover, the weight corn grains, and K-availability oj soil. Whereas, the rate oj 20 tlhaorganic matter (B,) significantly increased and gave the highest weight oj corn without husk cover, NPK corn plant contentand P uptake. The average NPK plant uptake oJcorn was 31.41-39.39 kg Nlha, 6.03-/2.54 kg Plha, 37.5-41.70 kg Klha. The average production oj corn was 5. /6-7.83 tlha.
Soil Moisture Characteristics on Several Soil Types
Authors: Baskoro Dwi Putro Tejo , Tarigan Suria Darma
Published: October 2019

Soil water availability is one of the important factors injluencing plant growth. Soil that can store more water in alonger time can support a better plant growth. This study was aimed to evaluate the dynamics of soil water of four differentsoils with different characteristics. Four soils classes are clayey textured soils-Red Yellowish Podsolik Jasinga, Clayeytextured soils-Latosol Darmaga, . Sandy Textured soil-Regosol Sindang Barang, and highly organic mater content soi/sAndosolSukamantri. The result showed that at every-suction analyzed, Andosol Sukamantri had consistently highest watercontent while Regosol Sindang Barang was consistently lowest. Similar tendency wasfoundfor available water capacity. Theresult also showed that moisture content at Regosol decrease more rapidly than those of the other three soils. The time need to reach likely constant moisture content is variable with soil type; lowest at Regosol Sindangbarang (45 hours after completely saturated and drained) followed by Podsolik Jasinga (73 hours), Latosol darmaga (74 hours) and Andosol Sulcamatri (76 hours).
A Study on the Current Status of Digital Literacy Education in Secondary Mathematics Curriculum and Lesson Plan
Authors:   The Korea Society Of Educational Studies In Mathematics, Noh Eunhee , Park Ji Hyun
Published: October 2019

The purpose of this study is to examine the current status of digital literacy education of the mathematics in accordance with the 2015 revised national curriculum and to draw up substantial improvements to foster digital literacy education in mathematics. This study intends to carry out a multi-layered inspection on how contents related to digital literacy has been adopted in the mathematics curriculum, how the math teacher perceive digital literacy education, and how they put this into practice in real classes. The study investigated how digital literacy has been adopted according to the changes of the mathematics curriculum and aggregate and considerate aspects how mathematics adopted digital literacy by characteristics in mathematics through analysis of standards in the 2015 revised national mathematics curriculum. In addition, this study analysis the current status of digital literacy education in mathematics education through surveying teaching cases, and exploring the improvements for digital literacy education in Mathematics education Through this study drew three suggestions so as to enhance digital literacy education of the mathematics: reinforcement of learning contents for strengthen digital literacy education of mathematics; activation of cooperative learning for digital literacy education of mathematics; and establishing a system to improve math teachers’ professionality.
Resistência docente à educação a distância (EAD): análise de trajetórias em busca de novas epistemologias
Authors: Silva Maria Aparecida da , Costa Lucineide Alvez , Bizarria Fabiana Pinto de Almeida
Published: October 2019

O estudo objetiva compreender processos de resistência docente em relação a EaD. Para tanto, realizou-se pesquisa fundamentada na metodologia história de vida, na perspectiva da abordagem qualitativa, com suporte na análise de quatro entrevistas com docentes de uma Instituição de Ensino Superior (IES), pública e federal localizada no estado do Ceará. Os dados foram analisados com referência nas categorias história de vida, vida profissional, domínio das TICs, EaD no ensino superior, ensino-aprendizagem e envolvimento com a EaD. O estudo sugere a existência de novas elaborações em torno da relação docência-ensino-aprendizagem suscitadas pelas experiências na EaD, e que convergem para discussões em torno de mudanças na identidade docente. A análise das entrevistados proporciona uma reflexão sobre o tema e, assim, outros estudos podem aprofundar a discussão de forma a contribuir com um novo discurso docente de forma que impacte a formação de professores com vistas a instituir novos processos de ensino-aprendizagem.
As redes sociais digitais e as possibilidades de uma educação bilíngue de surdos no ciberespaço
Authors: Pereira Simone Lorena Silva , Perlin Gladis Teresinha Taschetto
Published: October 2019

O presente trabalho teve como objetivo conhecer as motivações que tornam as redes sociais digitais, potencializadas pelos dispositivos de conexão permanente, cada vez mais atrativas e as possibilidades de tornar-se uma interface que privilegie uma educação bilíngue de surdos, na perspectiva da pedagogia surda. O artigo é a continuação do trabalho “As redes sociais digitais e a educação bilíngue: a emergência das ‘bolhas’ e ‘espumas’ surdas” acrescendo a questão da mobilidade, da ubiquidade e de dados coletados com 10 acadêmicos surdos do Curso de Letras-Libras da Universidade Federal de Sergipe através de questionários com questões abertas e fechadas. Os informantes deveriam dissertar sobre quais as redes sociais que utilizavam, quanto tempo usufruíam delas e qual a percepção das utilidades das informações disponibilizadas nesses espaços. Percebeu-se que, os estudantes surdos participam ativamente das redes sociais digitais impulsionados pela necessidade de agregar-se, de interagir e informar-se; apresentando-se, portanto, como ambientes que privilegiam as narrativas viso-culturais surdas em que a liberdade de emissão, a convergência midiática, as hipersintaxes híbridas, e a mobilidade podem fortalecer o empoderamento do “ser” surdo e contribuir para consolidar a Pedagogia Surda no ciberespaço.
A influência da gamificação na Educação a Distância com base nas percepções de pesquisadores brasileiros
Authors: Tenório Thaís , Silva André Rodrigues , Tenório André
Published: October 2019

A gamificação, emprego de elementos e estratégias de jogos em contextos educacionais, é uma metodologia recente possível de ser aproveitada no processo de ensino-aprendizagem a distância. Neste estudo de caso, o objetivo foi analisar as percepções de pesquisadores cadastrados no Conselho Nacional de Desenvolvimento Científico e Tecnológico brasileiro sobre as possíveis motivações, benefícios e dificuldades de usar a gamificação na educação a distância. Para os respondentes, as motivações frequentes para um educador a distância aproveitar a gamificação seriam dinamizar a aprendizagem e atrair e reter a atenção do aluno.Em relação aos benefícios dessa metodologia, motivar o aluno, instigar a participação, e incorporar entretenimento ao aprendizado foram os mais citados. No que tange às dificuldades, as respostas que se destacaram foram treinar o educador para aplicar a gamificação no ensino‑aprendizagem e conciliar elementos de jogos com as tecnologias de informação e comunicação disponíveis em ambientes virtuais de aprendizagem. A gamificação pode influenciar o ensino-aprendizagem a distância, mas os efeitos do uso dessa metodologia ainda são pouco compreendidos.
Formação Significativa: reflexões sobre a prática docente na Educação a Distância
Authors: Bezerra de Oliveira Falconiere Leone , Ferreida do Nascimento Hostina Maria
Published: October 2019

O presente Trabalho trata-se de um relato de experiência de um professor do Núcleo de Educação a Distância (NEAD) da Universidade Federal Rural do Semiárido (UFERSA), na disciplina Filosofia e Educação, do curso de Licenciatura em Computação, no qual foi utilizado como referencial teórico e metodológico os Três Momentos Pedagógicos (3MP), denominados Estudo da Realidade, Organização do Conhecimento e Aplicação do Conhecimento, desenvolvidos por Delizoicov; Angotti; Pernambuco (2009). A experiência aponta para a importância dos 3MP na construção do conhecimento significativas dos alunos do NEAD/UFERSA, tomando com ponto de partida os conhecimentos prévios dos alunos, o planejamento coletivo da equipe de professores da disciplina. Então, a reflexão sobre a prática docente de professores da Educação a distância (EaD)a partir dos 3MP torna-se essencial para a formação significativa dos sujeitos.
Caracterização de cultivares de amendoim quanto ao dano de Enneothrips flavens (Thysanoptera: Thripidae)
Authors: Nogueira Luciano , Almeida André Cirilo De Sousa , Godoy Ignácio José , Boiça Júnior Arlindo Leal , Jesus Flávio Gonçalves de
Published: October 2019

O tripes-do-prateamento, Enneothrips flavens Moulton (Thysanoptera: Thripidae) é considerado uma das mais importantes pragas do amendoim. O objetivo deste trabalho foi avaliar a caracterização de quatro cultivares de amendoim de hábito de crescimento rasteiro e cinco eretas ao dano de E. flavens em condições de campo, na safra das águas, nos anos 2009/2010 e 2010/2011. Adotou-se as cultivares IAC 147, IAC 213, IAC Caiapó e IAC Runner 886 de porte rasteiro e IAC Tatu ST, IAC 5, IAC 8112, IAC 22 e IAC 88-1 de porte ereto. O delineamento adotado foi em blocos ao acaso com parcelas subdivididas ao longo do tempo com quatro repetições. Para a avaliação das infestações de E. flavens, foram realizadas avaliações semanais dos 18 aos 67 dias após o plantio. Para a contagem do número de brotos por planta, coletaram-se cinco plantas por parcela aos 30, 60 e 90 DAE e ao final do ciclo, avaliou-se a massa de grãos por planta e a produtividade (kg.ha-1). Observou-se que independente do cultivar, as maiores infestações de E. flavens ocorrem ao redor dos 60 aos 67 DAE. Os cultivares IAC Caiapó e IAC Runner 886 apresentaram as menores infestações de E. flavens.
Características morfométricas, rendimentos de cortes e composição centesimal do híbrido tambacu
Authors: Barros Francisco Alex Lima , Brito Marcos Alan Da Silveira , Silveira Daniele Sousa da , Brabo Marcos Ferreira , Cordeiro Carlos Alberto Martins
Published: October 2019

Objetivou-se avaliar as características morfométricas, os rendimentos de cortes e a composição centesimal do híbrido tambacu. Utilizou-se 40 exemplares distribuídos em delineamento inteiramente casualizado, composto por quatro tratamentos referentes as classes de peso (T1= 800-1000g, T2= 1001- 1200g, T3= 1201-1400g e T4= 1401-1600g), e dez repetições. Foram avaliados os seguintes parâmetros morfométricos: comprimento da cabeça/comprimento padrão (CC/CP), comprimento da cabeça/altura da cabeça (CC/AC), comprimento padrão/comprimento total (CP/CT), largura do tronco/comprimento do tronco (LTR/CTR), largura do tronco/altura do tronco (LTR/ATR) e altura do troco/comprimento do tronco (ATR/CTR) e os seguintes rendimentos (%): carcaça (peixe eviscerado), tronco limpo, filé com pele, filé sem pele e da pele, sobras em “V”, índice de gordura visceral (IGV), espinhaço, cabeça e resíduos. Foram determinados, ainda, a composição centesimal utilizando-se cinco filés de cada classe de peso. Os parâmetros, CC/CP e LTR/ATR, apresentaram efeito da classe de peso (p<0,05). Observou-se diferenças significativas entre os rendimentos de pele e índice de gordura visceral (IGV), com valores médios 8,55% e 3,05% respectivamente. Na avaliação da composição centesimal, apenas a umidade não apresentou diferença significativa entre os tratamentos. Os valores mais elevados de lipídios (LP) foram 10,54%, em T2 e proteína bruta (PB) 16,68%, em T4. Os exemplares com peso médio variando de 800 a 1600g, apresentam semelhanças tanto para as relações morfométricas quanto para rendimentos de cortes. Entretanto, os peixes da classe T4=1401-1600g, apresentam adequados níveis de lipídios e elevados valores de proteínas bruta nos filés de tambacu cultivado.
Trayectoria territorial de la región enológica de Querétaro, México (1970-2017): enoturismo y calidad territorial
Authors: De Jesús- Contreras Daniel , Thomé-Ortiz Humberto , Espinoza Ortega Ángelica , Vizcarra Bordi Ivonne
Published: October 2019

El surgimiento de actividades recreativas en zonas rurales denota un proceso de turistificación del territorio, en el que sus dimensiones material y simbólica son convertidas en mercancías al servicio de los mercados turísticos. Se aborda el caso de la región vitivinícola de Querétaro donde se describen los procesos de apropiación del territorio en el marco del enoturismo. A partir de la perspectiva de la biografía cultural del territorio y desde un enfoque cualitativo, se discute cómo el turismo ha significado un mecanismo de apropiación territorial y dinamización del territorio. Se observa que el enoturismo es una plataforma de exhibición para los vinos queretanos y es una herramienta para la postulación de la calidad territorial, asociado a estos productos. Calidad, turismo y territorio son tres realidades interdependientes que ilustran la consolidación del capitalismo tardío en el espacio rural, al mismo tiempo que son la precondición para la revitalización económica y cultural de los espacios productores de vino.
Regionalización de la producción de maíz de temporal en el Estado de Puebla, México
Authors: Velázquez López Juan , Juárez Sánchez José Pedro , Ramírez Valverde Benito , Del Valle Sánchez Manuel , Jiménez Morales Juan , Taboada Gaytán Oswaldo Rey
Published: October 2019

Ante los requerimientos del dinamismo global y los problemas que trae consigo la división internacional del trabajo en el sector agrícola, surge la necesidad de identificar regiones agrícolas según sus capacidades productivas para contribuir a alcanzar la competitividad en la producción. La investigación se basó en la superficie cosechada y producción de maíz del ciclo agrícola 2013/2014 para evaluar el potencial productivo de las regiones productoras de maíz. Se empleó el método de análisis multicriterio utilizando las variables agronómicas y climáticas siguientes: a) temperatura b) precipitación c) tipo de suelo. El análisis arrojó tres regiones productoras de maíz; de alto potencial (2,64 ton/ha) mediano (0,97 ton/ha) y bajo potencial (0,34 ton/ha). La primera se ubica en el eje neovolcánico que parte del volcán Popocatépetl al Citlaltépec. Y una cuarta, la región óptima, que se localiza en los Llanos de Serdán, con una extensión de 2.590,7 km2 y su producción representó un 24,9% de la producción del Estado. Se concluye que la región más apropiada para producir maíz se localiza en el eje neovolcánico y específicamente en los Llanos de Serdán.