bluuebunny/crossref_metadata_2025 huggingface dataset:
Oversize Yield in Underground Mine Development
Authors:   Siberian Federal University, Krasnoyarsk, Russia., Vokhmin* Sergey Antonovich , Kytmanov Alexey Aleksandrovich ,   Siberian Federal University, Krasnoyarsk, Russia, Kurchin Georgij Sergeevich ,   Siberian Federal University, Krasnoyarsk, Russia, Kirsanov Aleksandr Konstantinovich ,   Siberian Federal University, Krasnoyarsk, Russia, Bovin Konstantin Anatol’evich ,   Siberian Federal University, Krasnoyarsk, Russia, Zaitseva Ekaterina Vasil’evna ,   Siberian Federal University, Krasnoyarsk, Russia, Shigin Andrey Olegovich ,   Siberian Federal University, Krasnoyarsk, Russia
Published: January 2020

Stoping, which is the initial link in the chain of the production processes of coal-face operation, significantly determines the performance of handling and mining-and-conveyor equipment, as well as losses and ore contamination. The size of the broken ore determines the cost of its mechanical crushing before lifting. Besides, the quality of breaking has a direct effect on the efficiency of ore enrichment. This influence manifests itself mainly in a significant increase in the cost of mechanical crushing and grinding of the ore, which are the most energy-consuming processes in ore dressing. The share of breaking in the direct financial costs of hard ore development, depending on the rock strength, reaches 20 – 35 %. Assuming that the main purpose of blasting operations in the mine is the destruction of the rock massif with creating the conditions for high-performance execution of the subsequent production processes of ore extraction, one should be careful about cost savings on breaking. The fact is that the proposed activities that reduce the cost of drilling and blasting may result in general deterioration of the quality of breaking. Therefore, the criterion of efficiency of any variant of blast hole drilling is to be an integrated indicator of the overall economic result of the entire production process chain, from coal-face operation to enrichment. Naturally, under certain conditions, when the effect of the results of stoping has local nature, the calculations can be made not for the entire production complex. This work analyzes the existing methods of calculating the parameters of blast hole drilling (BHD) in longhole stoping and considers the mining factors that affect the efficiency of stoping in similar geological conditions, namely, the oversize yield and the cost of coal-face operation. In practice, there are no methods for calculating the parameters of BHD that would be recognized as uniform and quite satisfying the needs of enterprises in all regions and types of mining. Depending on the local conditions, the home-developed methods proven by the practice are used, which are improved with experience. This work shows the experience in ore stoping at the Zapolyarny mine, and provides the results of industrial observations of the actual oversize yield.
Native Language Recognition using Bidirectional Long Short-Term Memory Network
Authors:   Research Scholar, Department of Computer Applications, BIHER - Bharath Institute of Higher Education and Research, Chennai, India., Shamrao* Kadam Sarika , Muthukumaravel A ,   Dean, Arts & Science, BIHER - Bharath Institute of Higher Education and Research, Chennai, India.
Published: January 2020

Speech Recognition of native language is the process of recognizing the language of a client dependent on the speech or content writing in another language. This article proposes the utilization of spectrogram as well as on cochleagram-oriented concepts separated from extremely short speech expressions (0.8 s by and large) to deduce the local language of the speaking person. The bidirectional long short-term memory (BLSTM) neural systems are received to classify the expressions between the local dialects. A lot of analyses is completed for the system engineering look and the framework's precision is assessed on the approval informational index. By and large precision is accomplished utilizing the Mel-recurrence Cepstral coefficients (MRCC) and Gammatone Recurrence Cepstral Coefficients (GRCC), separately. In addition, the advanced MFCC oriented BLSTM system and GFCC based BLSTM systems are combined to make use of their features. The examinations demonstrate that the execution of the combined system outperforms the individual BLSTM systems and precision of 75.69% is accomplished on the assessment information.
Leakage Current Mitigation in Transformer-less Photovoltaic Inverter Systems for Mining Equipment
Authors:   Research Scholar, Department of Mining Engineering, National Institute Technology Karnataka, Surathkal, India., Krishna* B. N. V. V. Prudhvi , Kunar B. M. ,   Assistant Professor, Department of Mining Engineering, National Institute Technology Karnataka, Surathkal, India., Murthy Ch.S.N. ,   Professor, Department of Mining Engineering, National Institute Technology Karnataka, Surathkal, India.
Published: January 2020

Challenging task of leakage current in photovoltaic converter is dealt for the application of portable mining electrical equipment. Inductive load and earth leakage causes distortion in the performance of the equipment in the transformer-less photovoltaic inverter systems. This leakage current introduce electromagnetic interference with neighboring circuits. The basic six device B6 type voltage source inverter is widely used for photovoltaic inverter systems, but leakage current is not addressed. H7 and H8 with additional switching device topologies reduces the leakage current problem and control strategy detects zero voltage states for reduction in switching losses. The proposed concept minimizes the leakage current due to inductance of RL loads, in general and specifically for mining equipment. Simulations study was carried out using MATLAB simulation software. Experimental were also carried out in real time, results showed that, reduced leakage current and total harmonic distortion in the output voltage and current waveforms. The elimination of the transformer and loading effects were analyzed for mining equipment having 1 kW Photovoltaic inverter system.
Design of various Automatic Control Topologies for Load Frequency Control of Six Area Hybrid Multi-Generation Power System
Authors:   M.Tech (Student), Dept of Electrical Engineering, JNTUA, Anantapur,AP,India., Karthik* Karnati , Kumar P. Bharat ,   Assistant Professor (Adhoc), Dept of Electrical Engineering ,JNTUA,Anantapur, AP , India., Sujatha P. ,   Professor, Dept of Electrical Engineering, JNTUA, Anantapur , AP, India.
Published: January 2020

The automatic load frequency control of six unequal areas hybrid model consist of thermal, reheat thermal plants, hydraulic governor system, nuclear, diesel, gas turbine plants. These generating units are represented from area one to area six. If any disturbance occurs in load results to variation of frequency and tie-line. When the generating area doesn’t meet load unit gives abnormal limits in response. This can be solved by the implementation of Proportional integral controller(PI), Artificial Neural Network controller(ANN), Adaptive Neuro Fuzzy Inference System controller (ANFIS).But still there is a chance to achieve better responses can be done by the proposed Genetic Algorithm (GA) based PI controller. In the MAT LAB environment hybrid model is developed. The Step varying input is applied that will leads to creating the disturbances and controlled by applying controller respectively. The evaluation of responses will be carried out by the control strategies of frequency responses and tie-lie power responses in all six areas hybrid model system. This work gives the information about the dynamic responses achieved by GA controller is more efficient than that of existing controllers and evaluated by MATLAB Simulink results.
An Efficient Framework using Deep Learning for Skin Cancer Classification
Authors:   Department of Computer Science and Engineering, Graphic Era deemed to be university, Dehradun, India., Garg* Sarthak , Garg Harshit ,   Department of Computer Science and Engineering, Graphic Era deemed to be university, Dehradun, India., Tripathi Vikas ,   Department of Computer Science and Engineering, Graphic Era deemed to be university, Dehradun, India., Pant Bhasker ,   Department of Computer Science and Engineering, Graphic Era deemed to be university, Dehradun, India., Pant Kumud ,   Department of Computer Science and Engineering, Graphic Era deemed to be university, Dehradun, India.
Published: January 2020

A good image analysis model can be very helpful in accurate diagnosis/classification of diseases for which images are available. Due to a plethora of public image databases, training and testing of algorithms on the dataset have helped in the development of an efficient framework for image classification. Skin cancer is one such disease for which recently image databases have been developed. Of the various methods of classification of skin cancer based on image analysis, convolutional neural network (CNN) has proven to be better performing than conventional machine learning approach. Realizing the importance of developing an efficient framework for skin cancer classification, this paper proposes a framework which utilizes VGG-16 CNN model to classify cancer images into categories namely, malignant or benign. We have trained the model using the skin cancer images freely accessible on the ISIC archive and attained an accuracy of 97.81%.
Implementation of a Line Follower Robot using Microcontroller
Authors:   Instrumentation & Control, AISSMS IOIT(Savitribai Phule Pune University), Pune, INDIA., Mohapatra* Badri Narayan , Husain Khan Usama Javed ,   Department Instrumentation & Control, AISSMS IOIT(Savitribai Phule Pune University), Pune, India.., Mohapatra Rashmita K. ,   Department E&TC, TCET, Mumbai University, Mumbai, India.
Published: January 2020

Implementation of new idea and new technology are the valuable gift to the recent generation. Utilization of new technology has shrunk the world and brought very easy within our reach. The expansion and growth of the ideas and concepts, are directly linked to the economic growth as well as development of the country. This paper presents microcontroller based line following robot. Successful implementation on control is depend upon the logic utilization and with proper knowledge on the specific design model. Basically a line following robot can easily follow the line as per instructions loaded in the controller.
Spectral Filtering Copper Coated Hibiscus-Methanol Extract for Photovoltaic Module Applications
Authors:   Department of Physics, Covenant University Canaan land, P.M.B 1023, Ota, Nigeria and Department of Mechanical Engineering Science, University of Johannesburg, South Africa.., Moses E* Emetere , Testimony Gabe-Oji ,   Department of Physics, Covenant University Canaan land, P.M.B 1023, Ota, Nigeria.
Published: January 2020

This research focuses on ways to protect the photovoltaic solar panel from harmful radiation during harsh weather conditions. The bio-filter made up of copper coated hibiscus extract from methanol was proposed. It was discovered that the bio-filter was able stabilize the fluctuations and in some cases improved on the output of the PV panel. It was recommended that the onward study on this kind of bio-filter would enhance higher patronage of PV products in the African market.
ЧЕТ ТИЛИ ДАРСЛАРИДА АУТЕНТИК АУДИО-ВИДЕО МАТЕРИАЛЛАРДАН ФОЙДАЛАНИШ
Authors: TEMIROVA Shakhlo
Published: January 2020

Ушбу мақолада чет тилини ўқитишда аудио ва видеоматериаллардан фойдаланишнинг самарали усуллари таҳлил қилинган. Ҳар қандай тил ўрганувчи учун хорижий (она тили бўлмаган) тилни ўрганиш қийинчиликлар туғдиради. Ана шундай қийинчиликларни бартараф этиш мақсадида, дастлаб, тил ўрганувчиларнинг коммуникатив компетенциясини шакллантириш масалалари кўриб чиқилди. Шунингдек, тил ўргатиш жараёнида ўқитувчи томонидан турли ёшдаги тил ўрганувчиларга тақдим этилаётган аудио ва видеоматериалларни саралаш босқичма-босқич амалга оширилди. Тил ўргатиш жараёнида видеоматериаллар муҳим аҳамиятга эга. Аудио ва видеоматериаллардаги нутқ эгасининг фикри, психо-эмоционал ҳолати, юз ифодалари, имо-ишоралари ёдамида талабаларнинг тил ўрганиш имконияти янада ортади. Бундай материаллардан фойдаланиш жараёнида тил ўрганувчи видеоматериалдан нутқ эгасини тўлақонли тушунмаслиги мумкин, аммо унинг имо-ишора ва мимикаларидан сўзловчи нутқини тахмин қилиши ёки қисман тушуниши мумкин. Бундай материаллар орқали тил ўрганувчида аста-секин тил ўрганишга кўникма ҳосил бўлади. Тадқиқот натижасига кўра, фақат овоз орқали тақдим этилган маълумотларга нисбатан овозли видеотасвирлар ёрдамида тақдим этилган маълумотлар тил ўрганувчиларга воқеликни яхлит англашга ёрдам беради.
Тил ўрганувчилар аудиториясига мавзу жиҳатдан мослаштирилган аудиовизуал материаллар ёрдамида уларнинг коммуникатив компетенциясини ошириш мумкин.
ШАХС ФОЖИАСИНИНГ БАДИИЙ ТАЛҚИНИ
Authors: KHOLDOROV Dilmurad
Published: January 2020

ХХ аср жаҳон афкор оммасини турли-турли синовларга рўбарў қилди. Дунёни қайта тақсимлашга уринишлар оқибатида пайдо бўлган жаҳон урушига ҳам шу ўтган аср гувоҳ бўлди. Агар назарни кенг, қамровни катта олиб қараладиган бўлса, жамият ҳаётидаги ижтимоий-сиёсий ва маънавий-маърифий ўзгаришлар инсоният поэтик тафаккурида ҳам янгича қарашларни вужудга келтирди. Айниқса, аср сўнггида юз берган қизил империянинг таназзулга юз тутиши, унинг ғоялари таъсирида шаклланган инсонлар руҳиятини алғов-далғов қилиб ташлади. Ўзбек ижодкорлари томонидан яратилган кўпгина асарларда алданган инсонлар тийнати, илоҳий эътиқодсизлик оқибатида пайдо бўлган руҳий бўшлиқлар, қалб фожиаларини акс эттирган бадиият намуналари пайдо бўлди. Мана шундай ижодкорлар сафида иқтидорли ёзувчи Шойим Бўтаев ҳам бор эди. Мазкур мақолада ўзбек қиссачилигида рўй бераётган услубий янгиланишлар, инсон муаммосининг турли ракурсларда акс этиши, турфа образлар дунёси таниқли ёзувчи Шойим Бўтаевнинг “Шамол ўйини” қиссаси услуби мисолида ёритиб берилган. Ёзувчи ижодида бугунги қиссалар услубининг етакчи хусусиятлари, уларда замонамизнинг долзарб ижтимоий-маънавий масалалари бадиий талқин этилаётганлиги характерлидир. Қолаверса, истиқлол давридаги эркин ижодий муҳит самаралари қисса жанрида қандай намоён бўлаётганлиги кузатилган.
ANALISIS KINERJA PEMERINTAH DESA DALAM PEMBANGUNAN MASYARAKAT DI DESA BONTOMANAI KECAMATAN MANGARABOMBANG KABUPATEN TAKALAR
Authors: Torau Sofyanto
Published: January 2020

Pemerintah desa sangat berperan dalam setiap kegiatan penyelenggaraan pemerintahan di desanya  serta harus mampu  menjalankan tugasnya dalam melaksanakan pembinaan masyarakat, pembangunan serta pemberdayaan masyarakat desa . Sejalan dengan hal ini, maka penelitian ini berujuan untuk mengetahui kinerja pemerintah desa dalam rangka pelaksanaan pembangunan masyarakat desa  di desa Bontomanai Kecamatan Mangarabombang Kabupaten Takalar. Pendekatan penelitian yang digunakan adalah kualitatif yang memberikan gambaran mengenai permasalahan yang diteliti serta menyajikan data dan menganalisisnya. Teknik pengumpulan  data melalui wawancara serta observasi dan dokumentasi. Hasil penelitian menunjukkan bahwa kinerja pemerintah desa dalam rangka pembangunan masyarakat desa sudah cukup baik, dengan beberapa indicator yang dikemukakan oleh Beranndian dan Russel yakni kuantitas kerja, kualitas kerja, pengetahuan kerja, kerjasama, kreativitas dan kualitias pribadi pemerintah desa dalam pelaksanaan pembangunan sehingga masih perlu ditingkatkan. Adapun indicator yang belum tercapai adalah pengetahuan kerja dan kreativitas pemerintah desa yang masih kurang dalam pelaksanaan pembangunan.
GEOESPACIALIZAÇÃO DE UM PROJETO FLORESTAL EM FUNÇÃO DO VPL
Authors: Fonseca Domingues Getúlio , Alves Barbosa Rodolfo
Published: January 2020

A silvicultura é de fundamental importância para uma produção sustentável em bacias hidrográficas na região da mata atlântica. As culturas de ciclo longo contribuem para a preservação do solo devido ao diminuto número de operações durante todo o ciclo. O fomento florestal realizado por grandes empresas do setor proporciona suporte técnico e operacional à produtores rurais que desejam ingressar na atividade silvicultural. Nesse sentido, o mapeamento das áreas viáveis economicamente para implantação de um plantio florestal dá suporte ao planejamento e garantia de rentabilidade ao produtor rural. Neste trabalho é apresentada uma metodologia para obter o valor presente líquido (VPL) distribuído espacialmente ao longo de uma bacia hidrográfica em função da produtividade local e dos custos de implantação, manutenção e extração da madeira. Os resultados mostram que o mapeamento do VPL determinou as áreas economicamente viáveis para projetos florestais ao longo de uma bacia hidrográfica e o uso do geoprocessamento basilar para a sustentabilidade.
A IMPORTÂNCIA DA REALIZAÇÃO DO ESTÁGIO SUPERVISIONADO NO CURSO TÉCNICO EM MECÂNICA
Authors: Auer Eliane Queiroz
Published: January 2020

Neste artigo constam as colaborações acerca de um estudo sobre a importância do estágio supervisionado para a continuidade da formação acadêmica e profissional no Curso Técnico em Mecânica. Tem como objetivo destacar a dimensão do estágio supervisionado no curso, considerando a prática e o percentual de empregabilidade. O presente estudo se desenvolveu a fim de demonstrar a relevância do estágio no processo de formação técnica, salientando sobre o manuseio dos instrumentos mecânicos, unindo o conhecimento teórico à experiência prática. Por meio do contato com ambiente de oficinas e laboratórios, os estudantes têm a oportunidade de desenvolver atividades relacionadas ao curso, assim, passam a integrar o mercado de trabalho, a que se propõem desenvolver a profissão após concluírem o curso, bem como ampliam os conhecimentos, e podem dar sequência aos estudos em nível superior. Trata-se de um estudo de caso com pesquisa de natureza qualitativa. A coleta de dados realizou-se por meio de entrevistas semiestruturadas e os participantes foram estudantes do curso técnico em mecânica ofertado no turno noturno. Com a realização deste trabalho pudemos concluir que o estágio supervisionado é fator crucial na formação acadêmica dos estudantes.
RECONFIGURAÇÃO INTELIGENTE DE REDES DE DISTRIBUIÇÃO DE ENERGIA ELÉTRICA CONSIDERANDO O INDICADOR FIC POR MEIO DO ALGORITMO BUSCA TABU
Authors: Reuter Carréra Torres Vitor , Farias Fardin Jussara , Frizera Encarnação Lucas , Bravin Donadel Clainer , Fiorotti Rodrigo , Lucio Pereira Adan , César Rueda Medina Augusto
Published: January 2020

O processo de reconfiguração da rede elétrica visa atender a critérios técnico-econômicos como o número de consumidores atendidos, a redução das perdas, a manutenção dos níveis de tensão e carregamento do sistema em patamares adequados, a redução do número de manobras das chaves, dentre outros. Diversos métodos vêm sendo desenvolvidos a fim de determinar a configuração ótima para o sistema. Entretanto, diversos métodos propostos não consideram indicadores de continuidade do sistema como, por exemplo, a frequência de interrupção individual por unidade consumidora ou ponto de conexão (FIC), os quais podem acarretar multas pelo lado da distribuidora caso seus limites não sejam respeitados. Em outros casos, mesmo incluindo indicadores de continuidade tais como o FIC, os métodos propostos não conseguem evitar o desligamento repetido de unidades consumidores em caso de contingências sucessivas. Desta forma, é apresentada neste trabalho uma nova metodologia para reconfiguração das redes de distribuição de energia elétrica que atenda às restrições operacionais do sistema, incluindo o indicador de continuidade FIC, a fim de evitar que um mesmo conjunto de consumidores seja penalizado repetidamente em caso de desligamentos sucessivos. Para lidar com os múltiplos objetivos e restrições do problema de reconfiguração da rede elétrica de distribuição, a metodologia proposta foi baseada no Tabu Search Algorithm (Algoritmo Busca Tabu). O método proposto foi aplicado à rede IEEE 123 barras, rede padrão de testes estabelecida pelo IEEE (Institute of Electrical and Electronics Engineers), apresentando resultados coerentes com a proposta.
Korespondencja – źródłem do badań biograficznych
Authors: Kocurek Danuta
Published: January 2020

W badaniach biograficznych wykorzystuje się różne źródła, a wśród nich ważne miejsce zajmuje korespondencja, która pozwala przybliżyć zarówno osoby, jak i wiele wątków historycznych w całej ich złożoności i wieloznaczności. Celem niniejszego artykułu jest ukazanie korespondencji jako źródła w opracowaniu biografii ks. dra Józefa Knosały (1878-1951).Realizowane poczynania badawcze prezentują korespondencję (38 listów) skierowaną do ks. dra Knosały w latach 1923-1938. Pisma i listy przybliżyły relacje ks. Knosały w wieloma dostojnikami kościelnymi (bp. Augustem Hlondem, ks. Józefem Gawliną), państwowymi (wojewodą śląskim Michałem Grażyńskim), politykami (Wojciechem Korfantym) i osobami zainteresowanymi historią. Analiza korespondencji pozwoliła ukazać ks. Knosałę jako człowieka wielkiego formatu, powszechnie szanowanego i cenionego ze względu na wiedzę i badania historyczne, które prowadził, oraz zaangażowanie w życie religijne i społeczne na Górnym Śląsku.
The Effects of Foliar Spraying of Folic Acid and Cysteine on Growth, Chemical Composition of Leaves and Green Yield of Faba Bean (Vicia faba L.)
Authors: Al-Maliky Azhar W.A. , Jerry Awatif N. , Obead Faris I.
Published: January 2020

An experiment was conducted during winter growing season of  2018 /2019 at Al-Qurnah sub-district, Basrah Governorate to study the effect of foliar spraying of folic acid and amino acid cysteine at different concentrations on growth, Minerals, chlorophyll contents and green yield faba bean (Vicia faba cv. Luz de otono). The study included sixteen treatments Consist of four concentration of folic acid (o,10,20 and 30) mg.L-1 in combination with four concentrations of Cysteine (0,10,20 and 30) mg.L-1. The results indicated that spraying with folic acid or cysteine significantly increased all vegetative growth characteristics (shoot height, branch number, leaflet number and fresh and dry weight of shoot system per plant), N, P, K, chlorophyll content of leaves and green pod yield/plant and fresh seed yields /plant. Spraying with folic acid at 30 mg.L.-1 and cysteine at 30 mg.L.-1 gave the greatest values of growth parameters, chlorophyll and yield, whereas 20 mg.L-1 folic acid with 30 mg.L-1 Cysteine was produced the highest values of N, P and K in faba bean leaves as compared with other combination treatments. Control treatment gave the lowest values for growth parameters, chlorophyll, N, P, K and yield.
Rising carbon dioxide is decreasing nutrition in crops and endangering health among the less wealthy
Authors: Smith Matthew , Myers Samuel S.
Published: January 2020

Carbon dioxide levels are rising globally. The increasing CO2 levels reduce the concentration of nutrients in many of the crops that are consumed worldwide (wheat, rice, barley, maize, legumes, and potatoes). The larger effects for human health are concentrated in regions that heavily rely on these crops for their nutrition such as South and Southeast Asia, North Africa, and the Middle East. Because these effects are likely to be hidden, we should better monitor the nutritional status of populations as well as crop nutrient content over the coming decades.
Rapid and coarse face detection: With a lack of evidence for a nasal-temporal asymmetry
Authors: Cabral Laura , Stojanoski Bobby , Cusack Rhodri
Published: January 2020

Humans have structures dedicated to the processing of faces, which include cortical components (e.g., areas in occipital and temporal lobes) and subcortical components (e.g., superior colliculus and amygdala). Although faces are processed more quickly than stimuli from other categories, there is a lack of consensus regarding whether subcortical structures are responsible for rapid face processing. In order to probe this, we exploited the asymmetry in the strength of projections to subcortical structures between the nasal and temporal hemiretina. Participants detected faces from unrecognizable control stimuli and performed the same task for houses. In Experiments 1 and 3, at the fastest reaction times, participants detected faces more accurately than houses. However, there was no benefit of presenting to the subcortical pathway. In Experiment 2, we probed the coarseness of the rapid pathway, making the foil stimuli more similar to faces and houses. This eliminated the rapid detection advantage, suggesting that rapid face processing is limited to coarse representations. In Experiment 4, we sought to determine whether the natural difference between spatial frequencies of faces and houses were driving the effects seen in Experiments 1 and 3. We spatially filtered the faces and houses so that they were matched. Better rapid detection was again found for faces relative to houses, but we found no benefit of preferentially presenting to the subcortical pathway. Taken together, the results of our experiments suggest a coarse rapid detection mechanism, which was not dependent on spatial frequency, with no advantage for presenting preferentially to subcortical structures.
The effect of heat treatment on the morphology and mobility of Au nanoparticles
Authors: Oras Sven , Vlassov Sergei , Vigonski Simon , Polyakov Boris , Antsov Mikk , Zadin Vahur , Lõhmus Rünno , Mougin Karine
Published: January 2020

In the present paper, we investigate the effect of heat treatment on the geometry and mobility of Au nanoparticles (NPs) on a Si substrate. Chemically synthesized Au NPs of diameter ranging from 5 to 27 nm were annealed at 200, 400, 600 and 800 °C for 1 h. A change in the geometry from faceted to more rounded shapes were observed with increasing annealing temperature. Kinetic Monte Carlo simulations indicate that the NPs become rounded due to the minimization of the surface area and the transition to lower energy surface types {111} and {100}. The NPs were manipulated on a silica substrate with an atomic force microscope (AFM) in tapping mode. Initially, the NPs were immovable by AFM energy dissipation. However, annealed NPs became movable, and less energy was required to displace the NPs annealed at higher temperature. However, after annealing at 800 °C, the particles became immovable again. This effect was attributed to the diffusion of Au into the Si substrate and to the growth of the SiO2 layer.
Does Weather Contribute to Stock Price Variation? A Cointegration Analysis
Authors: Gunasekara A. L. , Jayasinghe J. A. D. K.
Published: January 2020

The objectives of this study are to investigate whether there is a long term relationship between stock returns and weather factors and to examine whether the weather factors have an outperforming effect over macroeconomic variables when explaining the stock price variation. This study is motivated by the emergence of behavioral branch of asset pricing which pays attention towards the irrationality of investors who are influenced by the mood and the sentiment. This study investigates this phenomenon taking evidence from an emerging market, Colombo Stock Exchange.  The study uses Johansen Cointegration Test with VAR - Vector Error Correction Estimates and Variance Decomposition. The results confirm that weather factors are related with the stock prices in the long run and reveal that temperature has an outperforming contribution to the stock price variation whiles supporting the Temperature Anomaly which is widely tested in this background.
WhatsApp as 'technology of life': Reframing research agendas
Authors: Cruz Edgar Gómez , Harindranath Ramaswami
Published: January 2020

In this paper, we present a few ethnographic vignettes on the use of WhatsApp from a study in Mexico City. We suggest WhatsApp is a paradigmatic example of how a particular technology becomes an infrastructure to sustain, and therefore shape, a wide range of quotidian activities, from personal to economic, from spiritual to political. WhatsApp exemplifies what we call technologies of life, as such technologies mediate almost all aspects of social life. On this basis, we propose two interventions into the research agenda that go beyond data-centric approaches and focus on the lived-experiences of individuals, families, and communities.
Black Orthodox “Visual Piety”: People, Saints, and Icons in Pursuit of Reconciliation
Authors: Kravchenko Elena
Published: January 2020

African Americans regularly join Eastern Orthodox churches in the United States. By focusing on what practitioners do with Orthodox icons, this case study explores the processes through which specific experiences and expressions of being an Orthodox Christian become possible and meaningful for African American practitioners. This article suggests that saint veneration became a compelling Orthodox practice to practitioners because it provided a unique way to connect to the divine and to resist continuing racial discrimination in the United States. With the help of icons, African American men and women demonstrated that African people were saints, that African women contributed significantly to the history of Christianity, and that African Americans performed saintly acts. In this way, practitioners aimed to cultivate a reconciled Christian community where the full and equal membership of people of African descent is taken for granted. In following how Orthodox Christians put the materiality of their icons to work to deconstruct the assumption that whiteness is a universal default for religious experience, this article urges scholars of African American religions to make room for Eastern Orthodoxy as yet another tradition that supplies African Americans with creative tools to craft a compelling way of being a religious person.
Irrelevance of inflation: The Dow stocks
Authors: Azar Samih Antoine
Published: January 2020

The irrelevance of inflation is a proposition, inherited from corporate finance, which states that inflation is irrelevant for the valuation of nominal and real stock prices. In other terms, Net Present Values (NPVs) and stock returns are independent of the inflation rate.  The issue at stake is both theoretical and empirical, although the first came much before the latter. In the empirical realm, stock returns are found to be statistically negatively related to inflation. However, and theoretically, the classical school predicted that they should be related positively one-to-one. Moreover long run analysis, that came later, found that stock prices are positively related to price indexes. This stems from the fact that stocks are claims upon real assets, and, therefore, should be a hedge against inflation with the same one-to-one relation. This paper differs by subjecting all these hypotheses to the individual stocks included in the Dow Jones Industrial Index, and not to returns calculated from stock indexes, which is the usage. The empirical results in this paper support strongly the irrelevance of inflation.  This is true whatever the price index, whatever the econometric procedure, whatever the industry to which the stock belongs, and whatever the specification of the model.  Hence inflation is neither negatively nor positively related to stock returns, whether nominal or real.
Cost - Driving Strategy Under the Use of E-Business to Achieve a Competitive Advantage in a Digital Economy Environment
Authors: Al-Khasawneh Reem Oqab Hussein
Published: January 2020

The study has aimed at identifying the developments the modern business environment, i.e e-business, witnessed; it also identify to which extent accounting information systems contribute to the achievement of competitive advantage of economic advantage through cost leadership strategy, which represents one of  strategies of achieving competitive advantage. This strategy is significant and links to accounting work in digital economy environment and shifting toward e-application in business environment. 

The study has illustrated a set of fields which can be used in e-business environment in order to reduce the costs of economic units’ products in digital economy environment; industrial, marketing, administrative and finance cost may be reduced. 

In addition, the study has explained a set of accounting methods contributing to the achievement of cost strategy’s goals and competitive advantage of economic unit. The most important methods are as follows: activity-based cost system (ABC), value chain (VC), product life cycle (PLC), just on time product cost system (JIT) and target cost (TC).

Research study has found that working in e-business environment have various advantages which can contribute to the reduction of product costs. It has also concluded that IT environment required by e-business can be used, thereby shifting towards e-accounting. Accordingly, designing a central database containing the data of applying cost management strategies is a necessity; this database also provides positive relationships among all accounting methods, thereby achieving the general goal, i.e the achievement of competitive advantage of economic unit through the reduction of product costs; product prices can be reduced at the markets.
Evaluation of error types and quality on panoramic radiography
Authors: Aktuna Belgin Ceren , Serindere Gözde
Published: January 2020

Aim: The aim of this study was to investigate the prevalence of panoramic radiographic errors and to evaluate the correlation between age and panoramic radiographic error types.

Methodology: A total of 500 panoramic radiographs (259 male, 241 female) which have been taken for various reasons were randomly selected from the archive of our dentomaxillofacial radiology department.  Patients were divided into six age groups and by sex. The assessed errors included the tongue not in contact with palate, slumped position, patients not biting on bite block, patient movement, the chin tipped high, the chin tipped low, the patient positioned forward, the patient positioned backward, patient’ head turned to one side, foreign bodies in the image, exposure errors, positioning error of the lips and missing image. Each radiograph was quality rated as excellent, diagnostically acceptable or unacceptable.

Results: One or more errors were detected in 317 (63.4%) of the 500 panoramic radiographs, while no error was found in 183 (%36.6). It was observed that the most common error type was the slumped position (13.2%). Quality of the panoramic radiographs was evaluated according to the criteria, only 15% images were classified as “excellent”, 48.2% was as “inadequate for diagnosis” and 36.8% was as “adequate for diagnosis”. It was recorded that “slumped position” and “patient movement” errors were statistically significant in >56 years (p <0.05).

Conclusion: Patients can be protected from unnecessary radiation reception by investigating the causes of panoramic radiographic errors and training of technicians in this direction.

 

How to cite this article: Aktuna Belgin C, Serindere G. Evaluation of error types and quality on panoramic radiography. Int Dent Res 2019;9(3):99-104.

 

Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.
Successful establishment of third-line antiretroviral therapy in Malawi: lessons learned
Authors: Heller T. , Ganesh P. , Gumulira J. , Nkhoma L. , Chipingu C. , Kanyama C. , Kalua T. , Nyrienda R. , Phiri S. , Schooley A.
Published: January 2020

Setting: Malawi has an extensive national antiretroviral treatment (ART) program, and although less than 2% of all patients receive second-line ART, there are increasingly more patients failing on these regimens.Objective: To establish a virtual ART committee using
limited available local facilities and expertise to recommend third-line regimens based on genotype resistance of samples sent abroad.Design: A secretariat and a laboratory sample hub were established. The committee started work after locally organizing training courses. Decisions
about ART regimens were mainly based on a relatively simple, previously described algorithm, which allowed decisions to be taken without extensive expert knowledge.Results: Of the 25 applications assessed, 23 samples were sent for resistance testing from June 2017 to April 2018.
Major protease inhibitor (PI) resistance was detected in 65% of the samples. PI resistance was found even in patients exposed to PIs for short periods. In particular, patients who received co-administration of PIs and rifampicin frequently showed resistance mutations.Conclusion:
Third-line ART using genotypic resistance testing and algorithm-based treatment regimens are feasible in low-resource settings. Our model can serve as a base for similar programs initiating programmatic third-line ART in other African countries.
Uma Análise do Mercado de Ações Baseada na Correlação entre Ativos no StockTwits
Authors: Alves Gabriela B. , Bastos João Paulo S. R. , Brandão Michele A. , Pereira Adriano C. M.
Published: January 2020

O StockTwits é um microblog social cada vez mais popular e voltado para o público interessado em mercado financeiro. Neste trabalho, o porquê de empresas distintas serem citadas juntas no StockTwits é investigado. Além disso, analisamos como utilizar essa informação para auxiliar na tomada de decisão no mercado de ações. Especificamente, é proposta uma modelagem em grafo na qual os ativos são os nós e as arestas se formam quando os ativos são citados juntos em uma postagem. Em seguida, é feita uma análise das principais características e dos pares isolados da rede. Os resultados mostram que ativos citados juntos estão correlacionados com as variações no mercado financeiro.
Evaluating the Brazilian Portuguese version of the 2015 LIWC Lexicon with sentiment analysis in social networks
Authors: Carvalho Flavio , Rodrigues Rafael  Guimarães , Santos Gabriel , Cruz Pedro , Ferrari Lilian , Guedes Gustavo  Paiva
Published: January 2020

LIWC is a text analysis program that categorizes words into gram- matical and psychologically derived categories. The currently available LIWC lexicon for Brazilian Portuguese (LIWC 2007pt) is based on the 2007 version of LIWC program. As several studies indicated, LIWC 2007pt shows perfor- mance and categorization problems. In this scenario, this work highlights a new Brazilian Portuguese LIWC lexicon (LIWC 2015pt), based on LIWC 2015 program. This work compares the performance of LIWC 2007pt and LIWC 2015pt in classification tasks. Three experiments were conducted and the results indi- cate LIWC 2015pt outperforms LIWC 2007pt in all three tasks.
A culpa é dela! É isso o que dizem nos comentários das notı́cias sobre a tentativa de feminicı́dio de Elaine Caparroz
Authors: Rodrigues Lucas D. F. , Da Silva Júnior Jorge L. F. , Lobato Fábio  M. F.
Published: January 2020

As mı́dias sociais têm um importante papel na agenda de lutas feministas por proporcionarem um canal de denúncia e induzirem à redes de apoio. No entanto, discursos de ódio também são veiculados neste tipo de mı́dia. Visando estudar este contraponto, o presente trabalho analisa comentários de notı́cias sobre a tentativa de feminicı́dio da paisagista Elaine Perez Caparroz. A abordagem realizada foi conduzida com a coleta de dados de notı́cias e seus comentários que, posteriormente, foram analisados a partir de métodos para modelagem de tópicos, análise de sentimentos, correlação com likes e dislikes e também análise do nı́vel de escolaridade dos comentários. Os resultados mos- tram que a maior parte dos comentários comunga da opinião que a culpa foi de Elaine Caparroz, ressaltando o machismo que ainda há em nossa sociedade.
Caracterização de bots no Twitter durante as Eleições Presidenciais no Brasil em 2018
Authors: Nobre Gabriel P. , Almeida Jussara  M. , Ferreira Carlos  H. G.
Published: January 2020

Em 2018 ocorreram as Eleições Presidenciais no Brasil e foi frequenemente divulgado pela mı́dia que bots foram utilizados nas redes sociais para compartilhar fake news e aumentar o engajamento de candidatos. Com isso, o objetivo deste trabalho é caracterizar o comportamento desses usuários no Twitter durante as campanhas eleitorais. Para tanto, foram identificados mais de 2000 usuários bots, com métricas de atividade calculadas e comparadas com usuários comuns. Enfim, a influência de tais usuários foi quantificada e os resultados indicam que os bots afetaram as discussões online.
Caracterizando a campanha presidencial brasileira em 2018 usando dados do Twitter
Authors: Martins Emanuelle Azevedo , Gonçalves Kênia  Carolina , Miranda Filho Renato
Published: January 2020

As redes sociais online são relevantes até mesmo em processos eleitorais. Neste contexto, este trabalho caracterizou dados coletados do Twitter durante as eleições presidenciais brasileiras em 2018. Para tanto, foram analisados os dados ao longo do tempo como o percentual de seguidores, a quantidade de menções aos candidatos oponentes, as palavras mais utilizadas e os tweets compartilhados, curtidos e retweetados. Foi possı́vel identificar que o candidato que venceu as eleições não era o candidato com o maior número de seguidores, e sim aquele que foi mais citado pelos seus oponentes e nos trending topics, que apresentou maior variação em seu número de seguidores e acumulou maior quantidade de curtidas e compartilhamentos em suas publicações.
Evaluating Immersive Approaches to Multidimensional Information Visualization
Authors: Wagner Filho Jorge A. , Freitas Carla M. D. S. , Nedel Luciana
Published: January 2020

This dissertation investigates the use of Virtual Reality for the exploration of multidimensional data represented as 3D scatterplots. After an initial user study indicated that an immersive environment required less effort to find information and less navigation, but resulted in inefficient times and frequent user discomfort, we proposed and evaluated an alternative data exploration approach based on the use of physical movements, direct interaction with data at arms reach and a virtual reproduction of the analysts work desk. Through a second study, we demonstrate that this setup, named VirtualDesk, presents excellent results regarding user comfort, and performs equally or better in all tasks, while adding minimal or no time overhead and amplifying data exploration.
Porque Formar Engenheiros Obsoletos - Um Caso de Estudo
Authors: Da Costa Cesar
Published: January 2020

A tecnologia digital cresce de forma exponencial, novos equipamentos e sistemas são especialmente projetados para trabalhar em Automação Industrial. Asáreas ligadas à automação industrial sofreram grandes mudanças nosúltimos anos, sejam mudanças tecnológicas ou mudanças no mercado de trabalho. Este artigo visa, mais que propor soluções, provocar discussões sobre como e por que estudar automação hoje em dia (e como se ensina). Dentro desse cenário, uma nova abordagem faz-se necessária, no sentido de modernizar o ensino de Automação e Controle nos cursos de engenharia.
Uma Aplicação de Sumarização Textual Automática para Dispositivos Móveis
Authors: Cabral Luciano , Neto Manoel , Nunes Henrique , Junior Israel , Oliveira Marlysson
Published: January 2020

Este artigo descreve o desenvolvimento de uma aplicação para sumarização de conteúdos para dispositivos móveis, objetivando auxiliar a sociedade na busca, compreensão e interpretação de textos cujo seu núcleo não esteja suficientemente claro. A geração de sumários é uma atividade que cria uma pequena porção de um determinado texto, sendo pequeno, mas suficiente para cobrir as partes mais importantes do texto. Dentre as aplicações, enumeram-se estudos de língua portuguesa, além de auxiliar no processo de aprendizagem de uma segunda língua estrangeira, demonstrando o núcleo textual em diferentes idiomas.
POSTe-IP: Aplicativo Web para Otimização do Sistema e das Tecnologias de Iluminação Pública
Authors: De Araújo Lucas Mudo , Da Silva Pedro Henrique Campagna Moura , Lomba Luiz Fernando Delboni , Kanashiro Wesley Eiji Sanches
Published: January 2020

O objetivo desta pesquisa é desenvolver uma aplicação Web que receba os dados coletados do sistema de iluminação pública e permita o gerenciamento do sistema via software. Os dados serão coletados por sensores presentes em diversas plataformas distribuídas no parque de iluminação e transmitidos ao servidor central da aplicação, por meio de uma rede de sensores sem fio. O sistema permitirá a consulta da intensidade luminosa ideal de cada poste, além do consumo energético real e o status de cada um. Este artigo apresenta um resumo da estrutura proposta do sistema.
ROBTK: An intelligent robot to transport objects
Authors: Das Mecês Wallyson O. , Da Costa Edson M. , Tavares Jailton  W. , Diniz Patrícia  P. , Torres Renato  H.
Published: January 2020

Studies show that every year the number of accidents and medical care expenses increase due to the work accident. In the context of transporting objects, many activities are still carried out by human labor which in many cases may be subject to disasters due to the high number of hours worked or due to unhealthy activities. Taking into account the presented scenario, this work aims to introduce the robot ROBTK an intelligent robot to transport objects. We developed robot intelligence building a convolutional neural network (CNN) to perform object classification. The tests performed showed that both the intelligence and the mechanics designed are efficient.
MyPetSB - Management system for animals for adoption
Authors: Dornelles Alecsander , Parizi Rafael
Published: January 2020

The information is generated by thousands of people around the world every second on several devices available in the world. As a result of a conversation with ACOPASB members in the city of São Borja, a large amount of abandoned animals were found on the streets of the city and a large amount of animals were available for adoption. It has also been noted that people use social networks to search for animals for adoption or to inform others of lost and / or abandoned animals. Due to these problems, the present work proposes the development of an information system that will manage animals for adoption in the city of São Borja.
Limite Superior para o Problema da Diversidade Máxima
Authors: Soares Pablo Luiz B. , Campêlo Manoel
Published: January 2020

We apply the t-linearization to the straightforward 0 1 quadratic model for the maximum diversity problem. We computationally compare the obtained model with two other linear formulations from the literature. Computational experiments show that the t-linearization generates, on average, fewer constraints than the formulations, in addition to achieving a tighter upper bound in all used instances. On the other hand, one of the formulations can be slightly faster in obtaining the bounds.
Expected Emergence of Algorithmic Information from a Lower Bound for Stationary Prevalence
Authors: Abrahão Felipe S. , Wehmuth Klaus , Ziviani Artur
Published: January 2020

We study emergent information in populations of randomly generated networked computable systems that follow a Susceptible-Infected-Susceptible contagion (or infection) model of imitation of the fittest neighbor. These networks have a scale-free degree distribution in the form of a power-law following the Barabási-Albert model. We show that there is a lower bound for the stationary prevalence (or average density of infected nodes) that triggers an unlimited increase of the expected emergent algorithmic complexity (or information) of a node as the population size grows.
Politopo baseado em distâncias para o problema clássico de coloração de vértices em grafos
Authors: Dias Bruno , De Freitas Rosiane , Marenco Javier , Maculan Nelson
Published: January 2020

Neste trabalho, apresenta-se o modelo baseado em distâncias para o problema clássico de coloração de vértices em grafos (VCP). A formulação de programação linear inteira utiliza variáveis de decisão que representam a distância entre cores atribuídas para cada par de vértices distintos, no lugar de fornecer explicitamente tais cores. Mostra-se que há uma relação próxima entre esta formulação e o modelo baseado em orientação para o VCP, proposto também pelos autores deste trabalho. Em particular, prova-se que desigualdades indutoras de facetas para o modelo baseado em orientação podem ser traduzidas em desigualdades indutoras de facetas para o modelo baseado em distâncias e vice-versa.