bluuebunny/crossref_metadata_2025 huggingface dataset:
Purwarupa Antar Muka Graphical User Interface CTD Profiler
Authors: Setyanto Dajad , Pranowo Widodo S. , Delia Luddy Andreas
Published: July 2020

Tulisan ini menjelaskan tentang perakitan purwarupa CTD profiler, yang meliputi desain serta pembuatan casing, desain rangkaian elektronika, desain bahasa program untuk rangkaian elektronika, serta pembuatan program antarmuka untuk akuisisi data. Data tersebut dibutuhkan oleh echosounder untuk mengoreksi pembiasan dan penyerapan berkas suara sepanjang survei batimetri. Purwarupa ini dirancang untuk mengukur suhu, tekanan, dan konduktivitas pada interval yang dibutuhkan pada saat diturunkan sampai kedalaman tertentu pada area survei. Purwarupa ini juga dirancang dapat bekerja dengan ketersediaan pasokan listrik, maupun tanpa pasokan listrik yang stabil. Pada wahana apung yang tidak terdapat pasokan listrik, purwarupa ini menggunakan baterai. Program antarmuka di desain sedemikian rupa pada sistem operasi windows sehingga mudah dimengerti, mudah diinstall dan mudah dijalankan. Penulisan bahasa program untuk instrumen purwarupa menggunakan platform arduino IDE yang bersifat open source. Sedangkan pembuatan program antarmuka menggunakan platform Borland Delphi 7.
Utilidad de Pruebas de cadena de polimerasa, pruebas rápidas y Tomografías en pacientes con Covid-19
Authors: Meza Calvache Johanna Mercedes , Estrada Rodríguez Alex Daniel , Chabusa Chabusa Carlos Bismark , Velasco Paucar Victor Alfonso
Published: July 2020

En la actualidad existe un sinnúmero de métodos diagnósticos para Covid-19  desde pruebas para la detección de virus algunos con ventajas sobre la sensibilidad, especificidad y otros con desventajas sobre costos, infraestructura, personal sanitario capacitado para aplicarlos, si bien el procedimiento de elección es una técnica molecular de detección y amplificación de ácidos nucleicos o material genético como el RT-PCR, también es necesario disponer de pruebas rápidas, simples e idealmente con alta sensibilidad y precisión que se puedan realizar a gran escala para brindar un diagnóstico precoz,  realizar un mejor manejo clínico, epidemiológico de los pacientes. No obstante todas tienen sus limitaciones por esto es importante evaluar el rendimiento de las pruebas ya existentes, calificar cuál de estas es la mejor opción diagnóstica en base al análisis de los estudios públicados y de acuerdo a la realidad de cada estructura sanitaria  sustituir la RT-PCR para aplicarse en los hospitales. Métodos menos invasivos, más accesibles con menor carga económica como la tomografía axial computarizada de tórax pueden ser otras opciones, las alteraciones pueden estar presentes incluso en estadios iniciales especialmente en pacientes de riesgo, además de los moderados y severos, presentan patrones ya establecidos de acuerdo a la gravedad que permiten incluso puntuarlas, además de método diagnostico muy sensible, es importante su uso para el manejo de las complicaciones de Covid-19 como el tromboembolismo pulmonar así como seguimiento de los casos diagnosticados, disminuyendo las  tasas de morbimortalidad y las complicaciones  por esta causa. Realizar un diagnósticos precoz para tratamiento adecuado y oportuno es fundamentales para guiar las decisiones sanitarias en el contexto de covi-19.
Alteraciones oftalmologicas a causa de demodex
Authors: Gaibor Mestanza Pamela Margoth , Augusto Álvarez Maria José , Robles Urgilez Maria Dolores
Published: July 2020

El Demódex spp, es causa frecuente de afecciones oftalmológicas como la blefaritis crónica siendo este un problema mundial de salud pública por su alta prevalencia y por la dificultad para realizar el tratamiento debido a sus recaídas, genera frecuente consulta al area de oftalmológica. Presentamos una actualización sobre las manifestaciones clínicas oftálmicas con énfasis en la blefaritis a causa de D. folliculorum y brevis, mediante revisión de documentos secundarios donde destacan las características clínicas oculares causadas por este ácaro. La recurrencia de ésta enfermedad es muy alta y los tratamientos son limitados se manifiesta con aparición de costras y/o caspa en la base de las pestañas, irritación, prurito en los parpados y sensación de cuerpo extraño causando cuadros crónicos de blefaritis, blefaroconjuntivitis, rosácea ocular, trastornos de pestañas y chalazia, frente a una enfermedad infecciosa de la superficie ocular que no responde a tratamiento convencional, debe sospecharse este ectoparásito.
Aspectos generales de etiología y tratamiento de la sinusitis crónica
Authors: Miranda Cevallos Michelle Stefanía , Herrera Herrera Paola Alejandra , Vargas Baños Cesar Emilio
Published: July 2020

La sinusitis crónica es una enfermedad crónica que implica inflamación a largo plazo de la mucosa del seno nasal y paranasal. A pesar de su prevalencia generalizada y su impacto sustancial en la población, no existen medicamentos aprobados para su manejo y tratamiento. Esto se debe en gran medida a la falta de investigación sobre tratamientos seguros y efectivos, que a su vez está relacionado con la falta de comprensión de la fisiopatología de la enfermedad. El objetivo de este articulo proporcionar una revisión de la literatura sobre los referentes teóricos de la sinusitis crónica, con la finalidad de actualizar y profundizar los conocimientos sobre su etiología y de los aspectos generales del tratamiento clínico o quirúrgico que sean de utilidad para la comunidad científica. Se analizaron 20 artículos de revisión de la literatura y 5 artículos de análisis de datos sobre el tema. Se recopilaron artículos desde el año 2010 al 2019, tanto en idioma inglés como en español.  La evidencia respalda la irrigación salina diaria de alto volumen con terapia tópica con corticosteroides como terapia de primera línea para la sinusitis crónica. Se puede considerar un ciclo corto de corticosteroides sistémicos (1-3 semanas), ciclo corto de doxiciclina (3 semanas) o un antagonista de leucotrienos en pacientes con pólipos nasales. Se puede considerar un ciclo prolongado (3 meses) de antibiótico macrólido para pacientes sin pólipos.
Hesap Planı Değişimi Üzerine Bir İnceleme: Tek Düzen Hesap Planı ve Finansal Raporlama Standartlarına Uygun Taslak Hesap Planı Karşılaştırması
Authors: KABLAN Ali
Published: July 2020

Bu çalışmada, Tekdüzen Hesap Planı ile Yeni Hesap Planı Taslağının karşılaştırılması amaçlanmaktadır. Araştırma problemi; mevcut hesap planı ile uluslararası finansal raporlama standardına (UFRS) uyumlu yeni hesap planı taslağı arasında farkların mevcut olup olmadığının belirlenmesi ve varsa farkların tespit edilmesidir. Bu amaçla, mevcut Tek Düzen Hesap Planı (TDHP) ile Kamu Gözetimi Muhasebe ve Denetim Standartları Kurumu’nun (KGK), 28/12/2018 tarihinde yayınladığı Finansal Raporlama Standartlarına Uygun Taslak Hesap Planı karşılaştırması yapılmış, benzerlik ve farkları belirlenmiş, görüş ve önerilerde bulunulmuştur. Araştırmada belgesel gözlem yolu ile veriler toplanmış ve içerik analizine tabi tutulmuştur. Yapılan içerik analizi sonucunda elde edilen bulgulara göre; mevcut hesap planında şuan 250 hesap mevcut iken; taslak ile birlikte bu sayının 476 hesap sayısına ulaşacağı tespit edilmiştir. Taslak, mevcut TDHP’nin genel yapısını bozmamakla birlikte; boş hesap kodları kullanarak yeni hesap grupları oluşturulmuş ve yeni hesaplar eklenmiştir. Birçok hesap ve grup ismi, muhasebe standartları ile uyumlu hale getirilerek yeniden adlandırılmıştır.
Development of a converter unit for reading signals from a wave solid-state gyroscope with a quartz resonator
Authors: Shtek S. G. , Zheglov M. A. , Isaev M. M.
Published: July 2020

This paper describes the main principles of constructing systems for deriving information from wave solidstate gyroscopes with a hemispherical quartz resonator. A method for obtaining the necessary information by demodulating amplitude-modulated gyroscope signals is discussed. An electrical schematic diagram for the amplifier of the signal acquisition unit was developed using a domestic electronic component base. Computer simulation was carried out in the Micro-Cap environment. The prototyping was carried out, and the waveforms of the output signals of the proposed amplifier are presented.
Methodology for estimating the specific fuel consumption of a two-circuit turbojet engine
Authors: Kuznetsov V. I. , Shpakovsky D. D.
Published: July 2020

A technique was developed for determining the minimum specific fuel consumption of a two-circuit turbojet engine using statistical data on the polytropic efficiency of individual compressor and turbine stages. The proposed method allows the presence of a technological advantage in specific fuel consumption compared to similar engines to be identified at the initial stage of designing a two-circuit turbojet engine.
Study of Adverse Drug Reactions Associated with Chemotherapy of Breast Cancer
Authors: Anvisha Barli , Sireesha Bonthu Sai , Anitha Chilla , Sravya Sarvana , Gupta Dr. Shubham Babu , Rama B , Kamal Raj
Published: July 2020

Introduction/ Background Breast carcinoma is an important malignant tumor which occurs as non-invasive and invasive cancer with its various morphologic varieties. One of the treatments used for breast cancer is chemotherapy which has many side-effects. Aim and Objectives The aim of the present study is to assess the adverse drug reactions associated with chemotherapy of breast cancer. Methodology The study is observational, prospective study that includes all female patients admitted in day-care ward for chemotherapy cycles. Result The percentage of common side-effects were Nausea (75%), Alopecia (72%), Emesis (69%), Diarrhoea and Insomnia (64%), Asthenia (50%), Black nails (32%). There was a gradual reduction in weight of the study population. Conclusion The study emphasized the need to focus on management of other side-effects, for close monitoring over side-effects, muscle strength, weight changes, psychological health of the patient.
Analysis of Blast Fragmentation Using WipFrag
Authors: Nanda Suryajyoti , Pal B.K.
Published: July 2020

Fragmentation is the process of breaking of solid in-situ rock mass into several smaller pieces which are being excavated or moved by material handling equipment. It is the major concern of any blasting operation. Information on the degree and size distribution of fragments within a blasted rock mass is essential for efficient loading, transport, crushing and milling operations. An automated image based granulometry system WipFrag is used to analyze the digital image of rock photographs to determine grain size distribution. The method was tested in Dongri Buzurg open-pit manganese mine of Maharashtra (India). WipFrag software was found to be useful for fragmentation analysis of blast fragment sizes in very short interval of time
Consistently Simulating a Wide Range of Atmospheric Scenarios for K2-18b with a Flexible Radiative Transfer Module
Authors: Scheucher Markus , Wunderlich F. , Grenfell J. L. , Godolt M. , Schreier F. , Kappel D. , Haus R. , Herbst K. , Rauer H.
Published: July 2020

The atmospheres of small, potentially rocky exoplanets are expected to cover a diverse range in composition and mass. Studying such objects therefore requires flexible and wide-ranging modeling capabilities. We present in this work the essential development steps that lead to our flexible radiative transfer module, REDFOX, and validate REDFOX for the solar system planets Earth, Venus, and Mars, as well as for steam atmospheres. REDFOX is a k-distribution model using the correlated-k approach with the random overlap method for the calculation of opacities used in the δ-two-stream approximation for radiative transfer. Opacity contributions from Rayleigh scattering, UV/visible cross sections, and continua can be added selectively. With the improved capabilities of our new model, we calculate various atmospheric scenarios for K2-18b, a super-Earth/sub-Neptune with ∼8 M
⊕ orbiting in the temperate zone around an M star, with recently observed H2O spectral features in the infrared. We model Earth-like, Venus-like, and H2–He primary atmospheres of different solar metallicity and show resulting climates and spectral characteristics compared to observed data. Our results suggest that K2-18b has an H2–He atmosphere with limited amounts of H2O and CH4. Results do not support the possibility of K2-18b having a water reservoir directly exposed to the atmosphere, which would reduce atmospheric scale heights, and with it the amplitudes of spectral features, making the latter inconsistent with the observations. We also performed tests for H2–He atmospheres up to 50 times solar metallicity, all compatible with the observations.
Peculiar Prompt Emission and Afterglow in the H.E.S.S.-detected GRB 190829A
Authors: Chand Vikas , Banerjee Ankush , Gupta Rahul , Dimple  , Pal Partha Sarathi , Joshi Jagdish C. , Zhang Bin-Bin , Basak R. , Tam P. H. T. , Sharma Vidushi , Pandey S. B. , Kumar Amit , Yang Yi-Si
Published: July 2020

We present the results of a detailed investigation of the prompt and afterglow emission in the High Energy Stereoscopic System (H.E.S.S.)-detected GRB 190829A. Swift and Fermi observations of the prompt phase of this gamma-ray burst (GRB) reveal two isolated subbursts or episodes, separated by a quiescent phase. The energetic and the spectral properties of the first episode are in stark contrast to the second. The first episode, which has a higher spectral peak ∼120 keV and a low isotropic energy ∼1050 erg is an outlier to the Amati correlation and marginally satisfies the Yonetoku correlation. However, the energetically dominant second episode has lower peak energy and is consistent with the above correlations. We compared this GRB to other low-luminosity GRBs (LLGRBs). Prompt emission of LLGRBs also indicates a relativistic shock breakout origin of the radiation. For GRB 190829A, some of the properties of a shock breakout origin are satisfied. However, the absence of an accompanying thermal component and energy above the shock breakout critical limit precludes a shock breakout origin. In the afterglow, an unusual long-lasting late-time flare of duration ∼104 s is observed. We also analyzed the late-time Fermi Large Area Telescope (LAT) emission that encapsulates the H.E.S.S. detection. Some of the LAT photons are likely to be associated with the source. All of the above observational facts suggest GRB 190829A is a peculiar low-luminosity GRB that is not powered by a shock breakout, and has an unusual rebrightening due to patchy emission or a refreshed shock during the afterglow. Furthermore, our results show that teraelectronvolt-energy photons seem common in both high-luminosity GRBs and LLGRBs.
Investigating the Physical Conditions in Extended System Hosting Mid-infrared Bubble N14
Authors: Dewangan L. K. , Baug T. , Pirogov L. E. , Ojha D. K.
Published: July 2020

To observationally explore physical processes, we present a multiwavelength study of a wide-scale environment toward l = 13.°7–14.°9 containing a mid-infrared bubble N14. The analysis of 12CO, 13CO, and C18O gas at [31.6, 46] km s−1 reveals an extended physical system (extension ∼59 pc × 29 pc), which hosts at least five groups of the APEX Telescope Large Area Survey of the Galaxy (ATLASGAL) 870 μm dust clumps at d ∼3.1 kpc. These spatially distinct groups/subregions contain unstable molecular clumps and are associated with several Class I young stellar objects (mean age ∼0.44 Myr). At least three groups of ATLASGAL clumps associated with the expanding H ii regions (including the bubble N14) and embedded infrared dark clouds, devoid of the ionized gas, are found in the system. The observed spectral indices derived using the Giant Metrewave Radio Telescope (GMRT) and THOR radio continuum data suggest the presence of nonthermal emission with the H ii regions. The high-resolution GMRT radio continuum map at 1280 MHz traces several ionized clumps powered by massive B-type stars toward N14, which are considerably young (age ∼103–104 yr). Locally, the early stage of star formation is evident toward all the groups of clumps. The position–velocity maps of 12CO, 13CO, and C18O exhibit an oscillatory-like velocity pattern toward the selected longitude range. Considering the presence of different groups/subregions in the system, the oscillatory pattern in velocity is indicative of the fragmentation process. All these observed findings favor the applicability of the global collapse scenario in the extended physical system, which also seems to explain the observed hierarchy.
Timing the Pulsations of the Accreting Millisecond Pulsar SAX J1808.4–3658 during Its 2019 Outburst
Authors: Bult Peter , Chakrabarty Deepto , Arzoumanian Zaven , Gendreau Keith C. , Guillot Sebastien , Malacaria Christian , Ray Paul. S. , Strohmayer Tod E.
Published: July 2020

In this paper we present a coherent timing analysis of the 401 Hz pulsations of the accreting millisecond X-ray pulsar SAX J1808.4–3658 during its 2019 outburst. Using observations collected with the Neutron Star Interior Composition Explorer (NICER), we establish the pulsar spin frequency and orbital phase during its latest epoch. We find that the 2019 outburst shows a pronounced evolution in pulse phase over the course of the outburst. These phase shifts are found to correlate with the source flux and are interpreted in terms of hot-spot drift on the stellar surface, driven by changes in the mass accretion rate. Additionally, we find that the long-term evolution of the pulsar spin frequency shows evidence for a modulation at the Earth's orbital period, allowing for pulsar timing based astrometry of this accreting millisecond pulsar.
Local Simulations of Spiral Galaxies with the TIGRESS Framework. I. Star Formation and Arm Spurs/Feathers
Authors: Kim Woong-Tae , Kim Chang-Goo , Ostriker Eve C.
Published: July 2020

Spiral arms greatly affect gas flows and star formation in disk galaxies. We use local three-dimensional simulations of the vertically stratified, self-gravitating, differentially rotating interstellar medium (ISM) subject to a stellar spiral potential to study the effects of spiral arms on star formation and formation of arm spurs/feathers. We adopt the TIGRESS framework of Kim & Ostriker to handle radiative heating and cooling, star formation, and ensuing supernova (SN) feedback. We find that more than 90% of star formation takes place in spiral arms, but the global star formation rate (SFR) in models with spiral arms is enhanced by less than a factor of 2 compared to the no-arm counterpart. This results from a quasi-linear relationship between the SFR surface density

and the gas surface density Σ, and supports the picture that spiral arms do not trigger star formation but rather concentrate star-forming regions. Correlated SN feedback produces gaseous spurs/feathers downstream from arms in both magnetized and unmagnetized models. These spurs/feathers are short lived and have magnetic fields parallel to their length, in contrast to the longer-lived features with perpendicular magnetic fields induced by gravitational instability. SN feedback drives the turbulent component of magnetic fields, with the total magnetic field strength sublinearly proportional to Σ. The total midplane pressure varies by a factor of ∼10 between arm and interarm regions but agrees locally with the total vertical ISM weight, while

is locally consistent with the prediction of pressure-regulated, feedback-modulated theory.
Evaluation and sensitivity analysis of the ecosystem service functions of haze absorption by green space based on its quality in China
Authors: Zhang Ping , Wang Ning , Yang Lianwei , Zhang Xin , Liu Qi
Published: July 2020

Evaluation of the ecosystem service functions of haze absorption by green space is important for controlling haze. In this study, the ecosystem service functions of haze absorption by green space in China in 2001, 2004, 2007, 2010, 2013, 2016 and 2018 are analyzed based on green space quality and sensitivity using a geographic information system (GIS) and Moderate Resolution Imaging Spectroradiometer (MODIS) imagery. The results showed that the benchmark ecosystem service functions of haze absorption by green space when considering only the area of green space showed a trend that increases first and then decreases in 2001–2018, with 9000458.55 million Kg, 9145110.75 million Kg and 7734526.75 million Kg in 2001, 2013 and 2018, respectively. However, the corrected functions based on green space quality were 7724215.34 million Kg, 8320301.79 million Kg and 6510132.55 million Kg in the corresponding years. This indicated large differences between ecosystem service functions of haze absorption based on the quality and area of green space; only considering the area of green space to evaluate ecosystem service functions will result in overestimation. In terms of the spatial distribution of the ecosystem service functions of haze absorption by green space, there were greater differences in the benchmark and corrected functions, and the spatial distributions of the maximum, intermediate and minimum ecosystem service functions were notably different. However, the benchmark and corrected functions all showed a consistent trend in the rank of their contribution rates and ecosystem service functions as well as consistent distribution trends: the spatial distribution of ecosystem service functions of haze absorption by green space was very different in the same year, but there was little difference among different years. The change coefficients for the ecosystem service functions of haze absorption by arable land and grass land remained stable, whereas the coefficient of sensitivity for forest cover was elastic. Patch density (PD) and the ecosystem service functions of SO2 absorption, NOx absorption, dust retention and total ecosystem services showed a significant negative correlation, with correlation coefficients of -0.407, -0.511, -.330 and -0.332, respectively. In contrast, the area-weighted mean shape index (SAPE_AM) and ecosystem service functions exhibited significant positive relationships with correlation coefficients of 0.650, 0.634, 0.568 and 0.570, respectively. The results provide an improved method for evaluating the ecosystem service functions of haze absorption by green space as well as a reference for the prevention and control of haze and the coordinated development of regional societies, the economy and the environment.
Security and Privacy Challenges of Deep Learning
Authors: Onesimu J. Andrew , J. Karthikeyan , Viswas D. Samuel Joshua , Sebastian Robin D
Published: July 2020

Deep learning is the buzz word in recent times in the research field due to its various advantages in the fields of healthcare, medicine, automobiles, etc. A huge amount of data is required for deep learning to achieve better accuracy; thus, it is important to protect the data from security and privacy breaches. In this chapter, a comprehensive survey of security and privacy challenges in deep learning is presented. The security attacks such as poisoning attacks, evasion attacks, and black-box attacks are explored with its prevention and defence techniques. A comparative analysis is done on various techniques to prevent the data from such security attacks. Privacy is another major challenge in deep learning. In this chapter, the authors presented an in-depth survey on various privacy-preserving techniques for deep learning such as differential privacy, homomorphic encryption, secret sharing, and secure multi-party computation. A detailed comparison table to compare the various privacy-preserving techniques and approaches is also presented.
The Threat of Intelligent Attackers Using Deep Learning
Authors: Parras Juan , Zazo Santiago
Published: July 2020

The significant increase in the number of interconnected devices has brought new services and applications, as well as new network vulnerabilities. The increasing hardware capacities of these devices and the developments in the artificial intelligence field mean that new and complex attack methods are being developed. This chapter focuses on the backoff attack in a wireless network using CSMA/CA multiple access, and it shows that an intelligent attacker, making use of control theory, can successfully exploit a sequential probability ratio test-based defense mechanism. Also, recent developments in the deep reinforcement learning field allows that attackers that do not have full knowledge of the defense mechanism are able to successfully learn to attack it. Thus, this chapter illustrates by means of the backoff attack, the possibilities that the recent advances in the artificial intelligence field bring to intelligent attackers, and highlights the importance of researching in intelligent defense methods able to cope with such attackers.
Recent Trends in Channel Assignment Techniques in Wireless Mesh Networks
Authors: David D. Jasmine , V. Jegathesan , Jebaseeli T. Jemima , Ambrose Anand Babu , D. Justin David
Published: July 2020

Wireless mesh networks have numerous advantages in terms of connectivity as well as reliability. Traditionally, the nodes in wireless mesh networks are equipped with a single radio, but the limitations are lower throughput and limited use of the available wireless channel. To overcome this, the recent advances in wireless mesh networks are based on a multi-channel multi-radio approach. Channel assignment is a technique that selects the best channel for a node or to the entire network just to increase the network capacity. To maximize the throughput and the capacity of the network, multiple channels with multiple radios were introduced in these networks. In this work, algorithms are developed to improve throughput, minimize delay, reduce average energy consumption, and increase the residual energy for multi-radio multi-channel wireless mesh networks.
Thin Films of Nanocrystalline Vanadium Dioxide: Modification of the Properties, and Electrical Switching
Authors: Pergament A.L. , Berezina O.Ya. , Burdyukh S.V. , Zlomanov V.P. , Tutov Evgeniy A.
Published: July 2020

Vanadium oxide films have been fabricated by the acetylacetonate and triethoxy vanadyl sol-gel methods on silicon substrates, as well as by magnetron sputtering on glass-ceramic substrates. Additional annealing in reducing atmosphere results in formation of vanadium dioxide or mixed phases with a VO2 predominance. The obtained films demonstrate the metal-insulator transition and electrical switching. In the films produced from triethoxy vanadyl, the peculiarities of electrical properties are related to the size effect, heterophase character of vanadium oxide films, and different types of charge carriers in the bulk of nanocrystallites and on their surfaces. Also, the effect of doping with hydrogen by means of plasma-immersion ion implantation on the properties of vanadium dioxide is explored. It is shown that the transition parameters in VO2 thin films depend on the hydrogen implantation dose. At doses exceeding a certain threshold value, the films are metallized, and the phase transition no longer occurs.
Development of Flux for Protection of the Surface of Liquid-Metallic Low-Melting-Point Fusible Melt
Authors: Sivenkov Aleksei V. , Chirkova Olga S. , Konchus Darina A. , Mihailov Andrey V.
Published: July 2020

The results of the development of the flux CaO-Li2CO3-B2O3, operating in the oxidizing environment of the furnace, are shown. Flux is used to protect the melt from oxidation and removal of oxides from the coated sample surface. The use of this flux in open furnaces made it possible to apply high-quality nickel coatings with a thickness of 18 μm, which is comparable to the thickness of coatings obtained in vacuum furnaces in argon atmosphere. The negative effect of flux components on the sample surface was noted during prolonged contact under the conditions of the oxidizing environment of the furnace. Practical application of the research results will provide high-quality diffusion coatings on metal products. In addition, economic efficiency is maintained through accessibility of the equipment and flux components.
Analysis of the Causes of Cracks in the Production of Ingots and Forgings from Austenitic Stainless Steel 08Х18Н10Т (AISI 321)
Authors: Davydov Artem D. , Erokhina Olga O. , Ryaboshuk Sergey Vladimirovich , Kovalev Pavel Valer'evich
Published: July 2020

Austenitic stainless steels are widely used in industry. Increased requirements for the quality of products from these steel grades, the difficulties associated with the implementation of technological processes, as well as the high cost of steel, determine the necessity to assess probable causes of defects. This article presents an analysis of the influence of main process parameters on the quality of products from the grade 08X18H10T steel. Based on the results of statistical analysis and thermodynamic modeling, it was concluded that the increased content of titanium and nitrogen affects the quality of products, which is caused by the formation of titanium carbonitrides in the process of steel solidification.
Detection of Intermediate Phases in Metal Alloys
Authors: Shakhnazarov K.Yu. , Pryakhin E.I.
Published: July 2020

In addition to property anomalies, a distinguishing feature of the intermediate phase is the qualitative change of the crystallization or recrystallization interval (Q∆LS) that occurs at congruent and incongruent melting phases, at eutectic or eutectoid points, at the ends of eutectic or eutectoid horizontals, and also at any nonmonotonicity of the liquidus, since the solidus or solidoid is a horizontal in eutectic or eutectoid systems. A technique has been developed that allows us to associate anomalies in the properties of industrial alloys with state diagrams based on the first established criterion - a qualitative change (length in temperature) of the crystallization (recrystallization) interval (Q∆LS), as well as with a difference in the structural heredity (genealogy) of the component atoms that make up dual system. A joint analysis of the anomalies in the properties of binary alloys with state diagrams (based on the established criterion (Q∆LS)) allows us to relate the latter to the presence of intermediate phases in Al − Si, Fe − C, Al − Cu systems. The intermediate phases AnBm-Q∆LS explaining the anomalies of properties are declared: ~Al7Si, Al41Cu9 − correspond to the eutectic point; Fe24C − eutectoid point; Al11Si, AlSi6 − the bend of the liquidus; Fe42C − bending liquidoid; Al49Cu, Al98.5Si1.5 − the end of the eutectic horizontal; Cu4Al, Cu7Al3 − to the ends of the eutectoid horizontal.
Influence of Structural Parameters of Cutting Ceramics on Quality of Processing of Machine Slideways of Metal-Cutting Equipment in Selective Formation of Instrumentation
Authors: Gorshkov Ilya V. , Popov M.A.
Published: July 2020

Modern methods of machining of bed slideways with the required parameters of accuracy and quality of the processed surfaces are considered in order to increase productivity in the treatment of the surface of machine stands. To improve productivity, the finishing sanding operation has been replaced with finishing milling to ensure the required roughness, flatness and parallelism. The method of replacement of technological operations as exemplified by processing of a bed made of gray cast iron of grade “СЧ-20” is studied. The priority method of increasing the productivity of the processing of machine slideways of metal-cutting equipment, based on the use of cutting ceramics during the processing of the bed as a final technological operation, is determined. Based on the microstructural characteristics of oxide-carbide cutting ceramics, a uniform method of equipping cutters with cutting inserts with equal lifespan is used to increase productivity and achieve the required surface finish. This method of the milling cutter layout allows for longer life and provides the required margin of tool accuracy as well as allows predicting premature wear of the cutting tool. The results of the work are the identification of the patterns of influence of structural parameters of cutting ceramics on the quality of machine slideways of metal-cutting equipment in the selective formation of instrumentation. Studies have shown that the quality of machining depends on the microstructure characteristics of each insert used in the machining process when using interchangeable multi-sided oxide carbide ceramic inserts. The increase in productivity and quality of machining is achieved by monitoring the microstructure of the cutting oxide-carbide ceramics.
A Comparison of Hedonic and Utilitarian Digital Products Based on Consumer Evaluation and Technology Frustration
Authors: Hazarika Bidyut Bikash , Mousavizadeh Mohammadreza , Tarn Mike
Published: July 2020

This study explores how hedonic mobile applications (apps) compare to utilitarian apps in consumer evaluation. We posit that achieving a set of passionate consumers is a pre-cursor to product success in markets, whereas technology frustration is a negative hindrance to the product success. Also, we argue that technology frustration may act as a negative complementing factor to consumer passion, and this effect is higher for hedonic products than utilitarian products. We contextualize our study to the android apps, and used a dataset that tracked 18136 apps in the android market for three months and coded our variables from this dataset. We conducted empirical analysis and found support for our hypotheses. This study contributes to the information systems and marketing literature in providing a new dimension associated with consumer evaluation of digital products, and draws evaluative comparisons between hedonic and utilitarian digital products.
Blockchain, IoT and Fog Computing for Smart Education Management
Authors: Chaiyarak Sakchai , Koednet Alongkorn , Nilsook Prachyanun
Published: July 2020

The objective of this research is to present the use of blockchain technology, the internet of things and fog computing to develop the potential of school management for smart education. By using the blockchain to record and store various pieces of information the organization will create credibility of administrative data in all departments and will reduce corruption. Data can be examined transparently, especially the financial and budget management and procurement of durable articles. Regarding the academic work and registration, it can be used to store learners' information, educational history, information of enrollment, academic results, and participation in the various activities of the educational institutions. It can create credibility in the management of information about content, learning and ability assessment results that students receive, and these can be recorded and stored in a blockchain that can be safely distributed. In addition, IoT and fog computing are integrated with AI systems embedded in various modern devices to be applied in environmental management and smart education management. IoT and fog computing help to support and respond quickly to questions about the use of all types of equipment for real-time management of executives, personnel and students, as well as creating new work and learning styles that can solve the situation of dangerous communicable diseases, such as the COVID-19 situation, or can solve emergency situations that will emerge in the future by working and studying from home. It can organize and share resources for work and learning together to access the organization from outside anywhere and at any time
O Caso Lou:
Authors: Magalhães Bulhões Marcelo , Ribeiro dos Santos Ana Carolina
Published: July 2020

Este artigo flagra a gênese jornalístico-textual do que ficou conhecido no Brasil como romancereportagem, “ciclo” editorial iniciado pela editora Civilização Brasileira em 1975. Busca demonstrar, por meio de amostragem e análise de material textual inédito em pesquisas, que O Caso Lou, o primeiro romance-reportagem, possui vínculo estreitíssimo com a cobertura realizada por uma das principais revistas brasileiras daquele período, a Manchete. Tal associação, aliás, é mais direta do que se pode supor, pois as reportagens publicadas por Carlos Heitor Cony foram “transpostas”, com pequenas modificações, para a publicação no livro que deflagrou o romance-reportagem. Tal relação estreita não implica, todavia, equivalência semântica, uma vez que os distintos suportes ematerialidades editoriais de cada veículo participam profundamente da construção de seussignificados. A análise foi orientada pelos conceitos de mediação editorial e materialidade textual deRoger Chartier, os quais ensejaram como procedimento metodológico cotejo entre o materialjornalístico e o romance-reportagem.
Jornalismo e mudanças climáticas:
Authors: Beling Loose Eloisa
Published: July 2020

Este artigo de revisão tem o objetivo de apresentar resultados e interconexões de diferentes estudos feitos sobre a cobertura das mudanças climáticas publicados até início de 2018, em diversos países, de modo a verificar quais são as diferenças e semelhanças em relação ao contexto brasileiro. Buscase avançar na discussão dos possíveis efeitos da cobertura jornalística, especialmente sobre riscos climáticos e suas formas de enfrentamento. A partir de um mapeamento das pesquisas internacionais, articulam-se os modos de dar visibilidade à questão fomentada pela imprensa a respeito de uma das temáticas mais urgentes e necessárias da nossa contemporaneidade, apontando caminhos possíveis.
Experiências de Consumo no Samba:
Authors: Francisco de Araujo Fábio , Pinheiro Bitar Nina , Maria Antonieta de Souza Santos Marta , Ribeiro Baião Mirian , Pereira da Silva Tamires Christine
Published: July 2020

O samba é considerado um símbolo carioca, sendo muito comum encontros em grupos específicos para compartilhar o estilo musical. Esses encontros funcionam como espaço de representação e expressão sociocultural, interações e festejos, em que o consumo de variados tipos de pratos resulta em produção de sentidos que articulam festividade e alimento. Este trabalho tem como objetivo compreender o processo de construção de significados da tradicional feijoada na quadra da Portela por meio de uma pesquisa etnográfica. Realizou-se visitas à quadra da Portela para reconhecimento local, particularidades e identificação de interlocutores que mediassem a entrada no campo de estudo para empreender uma observação participante. Os resultados indicam que, embora tenha passado por mudanças no preparo, a feijoada da Portela se tornou um evento em que ocorrem as trocas simbólicas, contribuindo para construção dos significados que refletem e reconstroem a própria noção de “tradição” elaborada pelos integrantes da escola de samba.
Cinema e engajamento político:
Authors: Ferreira Ceiça , Solberg Helena
Published: July 2020

A cineasta Helena Solberg tem um papel fundamental na história do cinema brasileiro, pelo pioneirismo e pelo legado crítico de sua filmografia realizada nas últimas cinco décadas, que abrange o Cinema Novo, a militância feminista nos Estados Unidos e na América Latina, a ficção e o documentário contemporâneo. Apesar dessa trajetória singular, é somente em 2014 que essa cineasta começa a ser reconhecida no Brasil. Ao longo da entrevista que se segue, Helena Solberg aponta as inquietações que a levaram a fazer cinema nos anos de 1960, suas referências estéticas, experiências e trabalhos mais recentes, nos quais reitera seu engajamento político.
Quando o tempo importa:
Authors: Mendonça Domingues da Silva Juliano
Published: July 2020

O presente artigo tem propósito especialmente metodológico com base no seguinte problema: como surgem (e também como não surgem) políticas de comunicação? Esta investigação recorre a elementos da abordagem institucionalista histórica de modo a verificar sua aderência ao campo da comunicação. Para isso, (i) faz-se uma introdução de pressupostos da abordagem institucionalista histórica; (ii) aborda-se suas ferramentas teórico-conceituais que dão conta de fenômenos de continuidade e mudança; (iii) e, por último, (iv) aplica-se o IH aos casos “Lei da Mídia Democrática”, no Brasil, e Ley de Medios, na Argentina, com o objetivo de ilustrar sua operacionalização metodológica. Conclui-se que a abordagem institucionalista histórica representa um aderente e robusto conjunto de ferramentas para análise de gênese e desenvolvimento de políticas decomunicação.
Paisagem e autobiografia em Agnès Varda:
Authors: Heynemann Liliane Ruth
Published: July 2020

O ensaio empreende a análise de determinadas instâncias em Agnès Varda relacionadas à ideia de autobiografia, ao uso da paisagem e à conexão entre imagem, morte e memória. Nesse sentido, refletimos sobre os filmes As praias e Visages, villages, investigando como se atualizam em suas imagens os problemas que energizaram a cinematografia de Varda: os lugares e pessoas anônimos, os retratos, a errância, o trânsito entre narrativa de si e enunciação coletiva.
Exílio, feminismo e racismo:
Authors: Furtado Mendes Machado Patrícia
Published: July 2020

A proposta do artigo é mobilizar categorias historicamente importantes na luta por transformações políticas – como o feminismo, o racismo e o exílio – e analisar de que forma aparecem nos filmes de Agnès Varda. Para pensar na configuração de um cinema político de Varda não levaremos em conta o caráter panfletário ou militante no entendimento da política, mas aproximaremos a prática cinematográfica à prática filosófica de Hannah Arendt, que procurou esclarecer o que entendia por política não só por uma discussão conceitual, mas também pela narração de histórias de vidas.
Memória e esquecimento no jornalismo
Authors: Barsotti Adriana
Published: July 2020

O jornalismo sempre contribuiu para a formação da memória social compartilhada. Primeiras páginas de jornais cumpriram uma importante função comunicacional, ajudando a construir nosso imaginário sobre acontecimentos que sequer testemunhamos. Nos primórdios da internet, elas foram transpostas para os sites como home pages. Na contemporaneidade, entretanto, assistimos a uma queda na penetração dos jornais impressos e o surgimento de novas formas de navegação, por links, que podem afetar o modo pelo qual recordamos as notícias. O objetivo deste artigo é analisar a articulação entre memória e esquecimento que são acionados a partir da leitura de primeiras páginas em seus suportes impresso e digital e as consequências da desmaterialização para o jornalismo. Para atingir os objetivos, foram realizadas entrevistas em profundidade com 10 jornalistas que já editaram ou editam primeiras páginas e home pages em jornais de referência.
Estratégias de comunicação na ambiência digital:
Authors: Steffenello Ghisleni Taís , Frainer Knoll Graziela
Published: July 2020

A comunicação na ambiência digital se caracteriza pela interação e pela interatividade, que são responsáveis por várias mudanças nas práticas publicitárias ao longo do tempo. Entretanto, frequentemente, os trabalhos na área da publicidade costumam analisar as estratégias ora pelo viés das estratégias de comunicação, ora por meio das estratégias de marketing, tanto pela ligação das áreas, quanto pela carência de fontes diversas nacionais no campo publicitário. Este trabalho de pesquisa teve como objetivo discutir a respeito das estratégias de comunicação existentes centradas na ambiência digital. Como objetivos específicos, foram realizados o mapeamento do quadro conceitual de estratégias de comunicação e de marketing e a problematização da necessidade da atualização de conceitos nessa área. Para tanto, utilizamos pesquisa exploratória e descritiva, partindo dos conceitos de estratégias de comunicação e de marketing ou promoção de autores basilares. Assim, as estratégias foram identificadas, descritas e problematizadas no trabalho a seguir.
Linguagem e conhecimento por imagens:
Authors: Marques da Silva Godinho Danilo , Sousa Carvalho Cíntia de
Published: July 2020

O artigo aborda a presença das imagens técnicas na produção do conhecimento, problematizando o uso do recurso da videogravação em pesquisa acadêmica. Vale-se, para tanto, da articulação das reflexões acerca da linguagem desenvolvidas por Walter Benjamin (1892-1940) e Mikhail Bakhtin (1895-1975) à análise da produção teórica e cinematográfica de Pier Paolo Pasolini. Constata-se que o universo cinematográfico oferece subsídios para a utilização da imagem técnica na pesquisa em ciências humanas, ensejando a criação de narrativas imagéticas.
2. Rúbrica de diseño instruccional para aulas virtuales en la docencia universitaria
Authors: Polleri Giosianna , Jiménez Juana
Published: July 2020

El presente estudio tuvo  como objetivo diseñar una rúbrica de diseño instruccional para aulas virtuales en la docencia universitaria, se ubicó en la modalidad de proyecto especial apoyado en una investigación de campo descriptiva. La misma se desarrolló en tres fases: la primera diagnosticó  necesidad de la rúbrica, para lo cual se elaboró un instrumento con preguntas dicotómicas, validado por expertos y aplicado a docentes de la Universidad Centroccidental Lisandro Alvarado (UCLA) específicamente del Decanato Experimental de Humanidades y Artes (DEHA) y del Instituto Pedagógico de Barquisimeto (UPEL – IPB). En la segunda fase se diseñó la rúbrica atendiendo a indicadores del Modelo Instruccional del Método Divás (Díaz, 2006). Por último, la tercera fase correspondió a la validación de la rúbrica. La misma representa una guía que incidirá en el fortalecimiento del proceso de desarrollo de aulas virtuales en las Instituciones Educativas universitarias
Athletes and the prevalence of trauma involving the buco-maxillo-facial structure: knowledge and use of mouthguards
Authors: Moimaz Suzely Adas Saliba , Rejaili Jorge Abou , Saliba Tânia Adas , Chiba Fernando Yamamoto , Saliba Orlando
Published: July 2020

Introduction: Epidemiological analysis of buco-maxillo-facial (BMF) fractures is important to provide measures for preventive care and effective treatment of these injuries. Objectives: To verify the prevalence of sport-related accidents involving the BMF structure and factors associated with sport modality, and knowledge and use of mouthguards. Method: This was a cross-sectional, descriptive, survey-based study involving 647 athletes participating in different sports in a Brazilian city in 2019. Respondents answered a questionnaire that addressed the primary outcome - occurrence of trauma to the head and neck region during sporting activities - and the knowledge and use of mouthguards. The following variables were investigated: marital status, sex, age, education, sport, affected region, and cause and consequence of trauma. Results: One hundred forty-eight athletes (22.87%) sustained trauma during sporting activities/competition. The mouth was the most affected site (30.40%) and contact with an elbow was the main cause. In 80 (54.05%) athletes, trauma occurred during game conditions and 68 (45.95%) during training. A total of 536 athletes (82.84%) were familiar with the concept of wearing a mouthguard; however, only 169 (26.12%) actually used one, 13 (7.69%) of whom were fitted with a custom mouthguard recommended by a dentist. There was a significant association between the occurrence of BMF trauma (BMFT) and knowledge of mouthguards (p=0.0042), sport modality (p<0.0001), education (p<0.0001), age (p< 0.0001), and sex (p=0.0421). Conclusion: The occurrence of BMFTs in athletes was high. Although most were familiar with mouthguards, their use was not a usual practice.