bluuebunny/crossref_metadata_2025 huggingface dataset:
OBTENCIÓN DE UN TENSOACTIVO A PARTIR DEL PROCESO DE RECUPERACIÓN DE SEBO DE LAS INDUSTRIAS DE CURTIEMBRE
Authors: Parada Mabel , Andrade Mónica , Carreras Francisco , Flores Bolívar
Published: January 2021

Con el fin de desarrollar procesos nuevos que pretendan aprovechar los residuos sólidos generados por las industrias de curtiembre, se abre paso a la posibilidad de recuperar las grasas generadas en la etapa de descarnado, ya que la grasa animal contiene principalmente ácidos grasos (linoleíco, mirístico, esteárico, palmítico y oleico) de un valor comercial que pueden ser extraídos y transformados en un subproductos de uso industrial, además de incrementar la rentabilidad de este tipo de empresas y reducir su impacto ambiental. Las carnazas, que son pedazos de piel con grasa adheridas a la misma, son separadas y se obtiene tres residuos: grasa, líquido y lodos, siendo el objeto de estudio la grasa sin considerar el resto de residuos. con la grasa recuperada se realizaron análisis físico-químicos (índice de saponificación, yodo, acidez y peróxido) y posteriormente ensayos de laboratorio que iniciaron con la transformación de la grasa a un alcohol, seguido de la sulfonación y por último la neutralización, pruebas que dan como resultado la formación de un tensoactivo a partir de este tipo de grasas.
METODOLOGÍA PARA MEDIR LA MANTENIBILIDAD PROBABILÍSTICA APLICADA A GRUPOS ELECTRÓGENOS, INDICADOR PROPUESTO PARA EVALUAR LOS RETARDOS LOGÍSTICOS, ADMINISTRATIVOS
Authors: Gallegos Londoño César , Calderón Freire Edisson , Viscaíno Cuzco Mayra , Villacres Parra Sergio
Published: January 2021

La investigación se fundamenta en la evaluación global de la mantenibilidad en sistemas industriales, dividida en dos fases. La primera fase es el cálculo del indicador probabilístico de la mantenibilidad, abordando varias aristas como la marca de los equipos y los tipos de falla. Para el análisis probabilístico se utilizó la distribución de Weibull, cuyo análisis se realizó en un grupo de 91 grupos electrógenos en un lapso de diez meses. En la segunda fase se analiza los retardos logísticos y administrativos del mantenimiento que afectan a la mantenibilidad, y se delineó un nuevo indicador que permite evaluar dichos retardos. Estos procedimientos mencionados se complementan, pues el primero evalúa el tiempo de la ejecución técnica del mantenimiento y el segundo evalúa las demoras logísticas y administrativas, lo que proporcionará información útil para la toma de decisiones y la mejora continua.
The Effect of Cyber bullying Victimization on Counterproductive Work Behavior
Authors: Alwansyah Adam Ahmad , Santi Evi , Rahmat Syah Tantri Yanuar
Published: January 2021

Counterproductive Work Behavior (CWB) is a behvaior that is contrary with the norms and the rules of an organization. CWB can give the big problems in financial and non-financial aspect for an organization or a member of organization . In this study we will show the effect of cyberbullying victimization on CWB in organization. In this research CWB will be analyzed with the level of cyberbullying victimization that is a variabel which is rarely been studied. The object of this research is pest contrl sector that is never studied in previoud research. A questionnaire has been designed and distributed to 585 pest control employees at Indonesia and the data will be analyzed with SEM ( Structral Equation modelling). This research show that cyberbullying victimization give the positive and significant effect to CWB. This illustrates that the higher level of cyberbullying victimization within an organization, the higher CWB rate and otherwise.Counterproductive Work Behavior (CWB) is a behavior that is contrary with the norms and the rules of an organization. CWB can give the big problems in financial and non-financial aspect for an organization or a member of organization . In this study we will show the effect of cyber bullying victimization on CWB in organization. In this research CWB will be analyzed with the level of cyber bullying victimization that is a variable which is rarely been studied. The object of this research is pest control sector that is never studied in previous research. A questionnaire has been designed and distributed to 585 pest control employees at Indonesia and the data will be analyzed with SEM ( Structural Equation modelling). These researches show that cyber bullying victimization give the positive and significant effect to CWB. This illustrates that the higher level of cyber bullying victimization within an organization, the higher CWB rate and otherwise.
Classification of methods for implementing enterprise strategy
Authors: Khachemizov A. R. , Zarubin V. Z. , Dorgushaova A. K.
Published: January 2021

Strategy development is one of the most important functions of enterprise management. In addition to a sound strategic plan for the successful development of an enterprise, an effective mechanism for its implementation is required. The set of actions to develop the strategy and its implementation create the prerequisites for the formation of a strategic management system. The purpose of the research is to develop and use a new approach to the classification of methods for implementing enterprise strategy, which is based on the principle of separation of methods in accordance with the tasks of strategic management. Functional approach has been used as a methodological basis of the research. It provides for the division of the strategic planning process into a number of aggregated functional tasks. Scientific publications and works of foreign and domestic scientists were used, devoted to the analysis of the formation of strategic prospects for the enterprise development. The eventual result of the research was a classification of strategic planning methods, where the main stages of the strategic planning process, the tasks of strategic choice and methods of their solution are put in logical correspondence. The main features of the classification of methods for developing and implementing a strategy are: scientific specificity or specialization; characteristics of expert information; stage of the strategy development process; the degree of determinism of the problem conditions. Theoretical significance of the research lies in the development of methodological foundations for the formation and functioning of the strategic management system of an industrial enterprise. The classification of methods of strategic planning proposed in the article in accordance with the functional characteristics of the stage of strategic planning is of practical importance. The results can be used in subdivisions of an enterprise management system that solve the problems of developing and implementing a strategy, as well as in the educational process when training bachelors in the areas of «Management» and «State and Municipal Management».
Optimization of tobacco seed cleaning modes
Authors: Bubnov E. A. , Don D. V.
Published: January 2021

The process of obtaining high-quality tobacco seeds is very laborious, and at present many operations are performed manually at All-Russian Research Institute of Tobacco, Makhorka and Tobacco Products. The process of obtaining tobacco seeds at the Institute consists of the following operations: harvesting of inflorescences, drying of inflorescences, destruction of inflorescences, screening out coarse impurities, final cleaning in an air stream. An attempt was made earlier to mechanize and improve working conditions at the stage of final purification of the seed mixture. A unit for the final purification of tobacco seeds was developed, manufactured and tested. In this article other modes of final purification of the tobacco seed mixture to improve mechanization and productivity of the same unit have been tested. The seed mix of the 2019 harvest has been used in the studies. Coarse impurities have been separated from the seed mix by sieving through sieves with different hole sizes. Earlier modes of double final purification of seed mixture were proposed. In this research the previously proposed double cleaning modes have been taken as control ones, and in the experiment three-fold modes with a higher feed rate of the seed mixture have been used. As a result, the experimental modes provide identical removal of contaminants, however, the productivity of the unit increases 2 – 3 times due to the shorter total duration of purification, and mechanization is also improved due to a more uniform flow of the seed mixture. In this case, there is no need for the constant presence of an operator, and the process of final purification of the tobacco seed mixture is reduced only to its loading and unloading.
The effect of mineral fertilizers and methods of basic soil tillage on the productivity of new promising soybean varieties
Authors: Khatkov K. H. , Mamsirov N. I.
Published: January 2021

The agrotechnical significance of leguminous crops, in particular soybeans, consists in its ability to provide a huge bulk of vegetable protein and less nitrogen depletion of soils than non-legume crops [2]. Despite the fact that nitrogen symbiotically fixed by soybean plants is alienated with the harvest and taken out of the field with organic residues of leguminous crops, more nitrogen remains in the soil after them than with residues of other crops. In this regard soybeans are good predecessors in various stages of crop rotation. The article discusses topical issues of increasing productivity of leguminous crops, in particular, soybeans, when using different doses of ammophos against the background of its placement in various ways of main tillage of drained leached chernozems. In 2018–2019 studies were carried out to establish the influence of the optimal dose of mineral nutrition and the best method of soil cultivation on the productivity and quality indicators of soybeans of the French selection of the Amphora, Mentor and Isidor varieties. According to the results of the research, different effectiveness of the considered variants of the experiment was established. Thus, higher rates of soybean yield were noted in the later-maturing Isidor variety within 2,03–2,30 t/ha for plowing, and 1,70–1,91 for soil disking. The most cost-effective dose of mineral nutrition for all studied soybean varieties was the dose of 50 kg/ha of Ammophos (N6H26) against the background of plowing, where the profit from the increase in yield relative to the control was in the range of 2900–3650 rubles/ha, and against the background of disking soil the dose of Ammophos was 100 kg/ha (N12H52), where the profit was in the range of 1300–2050 rubles/ha.
Conexão Sustentável: um projeto de fomento à educação ambiental
Authors: Garufe Gomes Danilo , Calil Ana Maria Gimenes Corrêa , Silva Antonio Rodolfo Souza da , Marcondes Bussolotti Juliana , Novaes Laura Rechdan Ribeiro , Próspero da Cunha Virginia Mara
Published: January 2021

O presente estudo objetiva-se em debater a aplicação do projeto Conexão Sustentável nos contextos escolares nos quais ele foi desenvolvido. Para tanto, ocorreu uma influência mútua entre as escolas e etapas educacionais, com tarefas distintas – Escola A (alunos dos anos iniciais do Ensino Fundamental – 5º ano), Escola B (alunos dos anos finais do Ensino Fundamental – 8º ano) e Escola C (alunos do 3º ano do Ensino Médio). O Ensino Médio (Escola C) se encarregou de construir um jogo de tabuleiro, fundamentado na preservação do meio ambiente e a importância da reciclagem. O Ensino Fundamental (escola B) produziu um vídeo de sensibilização sobre a proteção do planeta, enquanto que na escola C, os educandos interagiram com as obras produzidas pelas escolas B e C. Logo após, os alunos, desta escola, produziram cartas para retornar aos produtores do vídeo e do jogo de tabuleiro o que eles sentiram e acharam sobre os materiais. Como apontamentos finais deste trabalho, percebeu-se que os alunos construíram consciência da preservação do meio ambiente, seja na hora da participação nas atividades propostas, quanto pós-execução.
Licenciatura em educação do campo e interdisciplinaridade: a realidade como fim e a práxis como meio
Authors: De Sousa Silva Paulo Roberto , Pinto Botelho Raimundo Edson
Published: January 2021

A partir de pesquisa documental e bibliográfica, o texto analisa a categoria interdisciplinaridade na Educação do Campo, tendo em vista aportar contribuições por ocasião da reestruturação dos Projetos Pedagógicos do Curso de Licenciatura em Educação do Campo, da Universidade Federal do Maranhão, em Bacabal. Além de um breve percurso histórico e uma revisão da literatura, partindo da crítica à disciplinaridade à crítica à interdisciplinaridade, o texto segue com uma retomada da Licenciatura em Educação do Campo em suas origens teórica e política, situando o lugar da interdisciplinaridade no currículo do curso, posicionando-se em favor da necessidade de uma abordagem interdisciplinar no ensino de conhecimentos produzidos interdisciplinarmente e para a compreensão da realidade do campo como totalidade, situando o conhecimento e a respectiva abordagem pedagógica como práxis. E aponta como possíveis caminhos para a Interdisciplinaridade na Educação do Campo: a pesquisa e o trabalho como princípios educativos e a organização curricular por alternância, que se integram a partir de um plano de atividades organizador do trabalho coletivo interdisciplinar, orientado por eixos integradores representativos de fenômenos relevantes da realidade camponesa, tomada como objeto de estudo e intervenção pedagógica, através do ensino, pesquisa e extensão.
Educação superior do campo: Reflexões e críticas da formação de professores no curso de Licenciatura em Educação do Campo Ciências da Natureza e Matemática na UFMA
Authors: Costa Diniz Diana , Ghedin Evandro
Published: January 2021

Neste artigo apresentaremos a experiência de formação de professores no Curso de Licenciatura em Educação do Campo Ciências da Natureza e Matemática na Universidade Federal do Maranhão – UFMA. Sua construção é resultante dos estudos de doutoramento no programa de Pós-graduação em Educação em Ciências e Matemática da Rede Amazônica de Educação em Ciências e Matemática (Reamec). Ele resulta de pesquisa bibliográfica e documental na análise dos dados com fundamentação no materialismo histórico e dialético. Pretendeu-se neste trabalho discutir a formação de professores no contexto da expansão da Educação Superior do Campo em contraposição a concepção de Educação Rural, arraigada no velho ruralismo pedagógico considerando as mudanças políticas e sociais a partir dos anos de 1990 no Estado Brasileiro.
Integração de Saberes na Educação do Campo: Proposições teórico-metodológicas
Authors: Mauricio Pomuchenq Felipe Junior
Published: January 2021

Com o objetivo de, Apresentar aprofundamentos teóricos e metodológicos sobre a integração dos saberes, em especial na educação do campo; e Refletir sobre a importância da visão ampla do conhecimento para a aprendizagem do estudante, o presente trabalho busca trazer orientações para a integração de saberes no ensino na educação do campo. Utilizou-se da Revisão de Literatura, a partir de artigos apresentados no Encontro Nacional de Didática e Práticas de Ensino (ENDIPE) entre 2012 e 2016 e nas produções do Programa de Pós-Graduação em Ensino na Educação Básica (CEUNES/UFES). Verificou-se que a integração dos saberes pode se concretizar de diversas formas, tais como projetos, interdisciplinaridade, estudo da realidade, mas sempre prezando pelo respeito aos diversos saberes que a humanidade produz. Aspectos como a articulação entre desenvolvimento científico e capitalismo, formação fragmentada dos professores, práticas individualistas, estrutura “fechada” dos currículos, e a sobreposição da ciência, vem se mostrando um desafio na superação de uma visão reducionista do conhecimento.
Um olhar sobre a Escola Comunitária Municipal Rural "São João Bosco".
Authors: Silva de Souza Lucas , Rodrigues Hastenreiter Taysnara , Fabem Jardel Zanette
Published: January 2021

A educação do Campo vem sendo construída pelos movimentos sociais há mais de 20 anos. Neste contexto as Escolas em Alternância tem se destacado em garantir uma educação própria e apropriada para os filhos dos camponeses. Este artigo tem como objetivo relatar a experiência da Escola Comunitária Municipal Rural “São João Bosco”, localizada na comunidade Dezoito, Município de Jaguaré, ES, enfatizando o seu processo organizacional, os instrumentos pedagógicos realizados na escola, práxis, currículo e avaliação. Esta vivência permitiu visualizar a importância dessa escola para a comunidade local e a contribuição desses conhecimentos práticos e teóricos para os agricultores, tendo em vista o elo que existe entre Família – Monitor – estudante.
pedagogia da alternância na França: de uma discreta experiência a institucionalização na educação profissional
Authors: Teixeira da Silva Luciane
Published: January 2021

O artigo trata da Pedagogia da Alternância desenvolvida na França. Por meio de revisão bibliográfica foi possível identificar três momentos da Alternância neste país. A primeira experiencia com a Alternância, de caráter popular, baseado na organização dos movimentos sociais e da Igreja Católica; o início do processo de institucionalização e por fim desde os anos 80 até momento atual onde a alternância é identificada como uma via pedagógica primordial para o ingresso no mercado de trabalho. A Alternância é um conceito em processo de evolução e atualmente se constitui como o caminho de excelência para a Educação Profissional na França.
Meningkatkan Kemampuan Belajar Membaca Al Quran Melalui Metode Preview, Question, Read, Reflect, Recite, Review Sebuah Literasi Siswa Raudhatul Atfal
Authors: Parida Parida
Published: January 2021

Guru pada hakekatnya merupakan tenaga kependidikan yang memikul berat tanggung jawab kemanusian, khususnya berkaitan dengan proses pendidikan generasi penerus bangsa menuju gerbang pencerahan dalam melepaskan diri dari belenggu kebodohan. Betapa berat tugas dan kewajiban yang harus diemban oleh guru tersebut sehingga menuntut profesionalitas tinggi dalam proses pembelajaran. Melalui kompetensi profesionalnya, guru harus mampu mewujudkan langkah-langkah pembelajaran inovatif dan kreatif, sehingga proses belajar mengajar dapat bermakna serta tranfer of knowledge dan transfer of value dapat dengan mudah tersampaikan. Pembelajaran membaca Al Quran terdapat dalam pembelajaran kelas dan out kelas.
Pembelajaran Membaca Al Quran masih belum banyak mendapat perhatian dari guru. Siswa pun masih kurang terbiasa untuk membaca, apalagi jika pembelajaran membaca Al Quran dari refleksi kehidupan sehari-hari. Hal ini terjadi karena guru belum memberikan bimbingan kepada siswa secara maksimal. Akibatnya siswa mengalami kesulitan. Jika mendapat tugas membaca Al Quran dengan menggunakan metode PQ4R (Preview, Question, Read, Reflect, Recite, Review ) diharapkan siswa dapat termotivasi untuk Membaca Al Quran dari refleksi kehidupan sehari-hari.
Understanding the Drivers of Household Energy Spending: Micro Evidence for Latin
America
Authors: Jimenez Mori Raul , Yepez-Garcia Ariel
Published: January 2021

The paper investigates the determinants of household energy spending and energy budget shares, with a focus on understanding their non-linear relationship with income, and the presence of economies of scale. The analysis is based on a unique, harmonized collection of official household surveys from 13 Latin American countries. This dataset allows distinguishing between expenditures on electricity, domestic gas, and fuel for private transportation, providing a comprehensive distributional view of the energy spending profile of the residential sector. The estimated empirical Engel curves behave similarly; however, the derived income elasticities show marked distinctions by fuel, and their actual values depend on the households’ relative position over the income distribution. For electricity, the elasticity tends to increase in income but stabilize at the wealthiest segments. For gas and transport fuel, it decreases under different income paths. In this dataset, the examination returns income elasticities on the (0,1) interval, suggesting that energy commodities are necessity goods. However, the distribution of aggregate energy expenditure needs to be considered. Specifically, there is a great concentration among the richer groups, particularly for transport fuels, where the top quintile gathers more than half of the aggregate spending. The results also indicate economies of scale ––for electricity and domestic gas–– with respect to family-age composition, and to a lesser extent with respect to dwelling size. In the case of electricity, these economies are more pronounced for richer households. These results join the previous literature in emphasizing the relevance of accounting for household demographic and socioeconomic trends for energy management.
LOSS ALLOCATION OF TRANSMISSION LINE AND MINIMIZATION OF LOSS FOR 5 BUS,14 BUS &30 BUS SYSTEMS
Authors: A.V. SUNIL KUMAR , K.C KUMUDEESH , C.M REKHA , .C DR.SHIVASHARANAPPAG
Published: January 2021

The paper focuses on the issue of transmission loss allocation and transmission loss minimization by incorporating UPFC injection model using load flow analysis. To investigate the effect of the UPFC on the steady state condition of the system and load flow, different models can be used. These models are usually based on modification of traditional load flow methods. In this project, a mathematical model for UPFC referred as UPFC injection model is used. Since accurate power tracing is very difficult, allocation of losses for a particular transaction (in power business it is buying and selling system) may not be effectively realized. However loss allocation is an important aspect in determining the cost of transmission. Thus a methodology to find the losses accurately is vital. It is imperative to make sure that all users of the transmission network are charged proportionate to their usage and this aspect is all the more important because of the common infrastructure they use. The Z-bus loss allocation method is used to achieve the required objective. This method will promote more efficient network operations when implemented in deregulated electric industries. The Unified Power Flow Controller (UPFC) injection model is incorporated in Load Flow Model by the method of Newton Raphson Algorithm to study its effects for power flow control and losses minimization in the power system. In this project optimal placement of UPFC is conducted based on active power loss Sensitivity factors. Based on these sensitivity factors the UPFC is optimally placed in the required transmission line to investigate the impact of UPFC in the system. The changes in the system are studied to see the impact of the UPFC. The impact of UPFC are analyzed by using 5-Bus, IEEE.
GESTURE BASED TOUCHPAD SECURITY SYSTEM WITH DESIGN OF TOUCH SCREEN CONTROLLER
Authors: S SOWMYA , MATHAPATI AKSHAY , M P SHRUTHILAYA , SHETTY SANTOSH
Published: January 2021

The purpose of the project is to present a new approach on the design of security systems by using a touch sensitive device. Security is a permanent concern in a variety of environments ranging from physical access restriction in home and industrial settings to information security in digital systems. Numeric passwords, fingerprint recognition, and many other techniques have been extensively implemented in the past but they present certain drawbacks. The proposed technique makes use of a touch device to recognize symbols as passwords and takes time into account to add a new dimension and prevent password theft. We implemented a prototype that demonstrates the capabilities of the proposed security approach by showing one direct application in physical access restriction systems.
A NOVEL MATLAB/SIMELECTRONICS MODEL OF PV ARRAY WITH MPPT CONTROLLER
Authors: DEEPTHI P SIVA , GURURAJ B , KISHORE G. , ACHARI K. NARASIMHAIAH
Published: January 2021

A photovoltaic array (PVA) simulation model to be used in Matlab-Simelectronic GUI environment will be developed and analyzed in this paper. In Simelectronic environment the simulink signal is converted to physical signal and again physical signal is converted to simulink signal. The model is developed using basic circuit equations of the photovoltaic (PV) solar cells including the effects of solar irradiation and temperature changes. The new model developed will be tested using a directly coupled dc load. A new implemented Photovoltaic Array Simulation model is to be developed by using Matlab/ Simelectronic Simulation Software. Test and validation studies with proper load matching circuits are simulated and results are presented here.
ANALYSIS AND CONTROL OF HARMONICS OF THREE PHASE INDUCTION MACHINE BY SPACE VECTOR DECOMPOSITION USING MATLAB SIMULATION
Authors: PATWA SHARDA , AMHIA HEMANT
Published: January 2021

The technique of vector space decomposition control of three phase induction machine is presented in this paper. By vector space decomposition the analytical modeling and control of machine are accomplished. The space vector decomposition technique limits the 5th, 7th, 17th, 19th….harmonic currents, which in such a system is otherwise difficult to control. This synopsis present harmonic analysis of motor current of medium and high power Variable Frequency Drive (VFD) Systems. Computer simulation of an IGBT fed induction motor based on constant voltage/frequency (V/f) operation is implemented using simulation software.
A HIGH SPEED VLSI ARCHITECTURE FOR DIGITAL SPEECH WATERMARKING WITH COMPRESSION
Authors: AVIRNENI RAJA SREE. , VASAVI K. PADMA
Published: January 2021

The need to provide a copy right protection on digital watermarking to multimedia data like speech, image or video is rapidly increasing with an intensification in the application in these areas. Digital watermarking has received a lot of attention in the past few years. A hardware system based solely on DSP processors are fast but may require more area, cost or power if the target application requires a large amount of parallel processing. An FPGA co-processor can provide as many as 550 parallel multiply and accumulate operations on a single device, but FPGAs excel at processing large amounts of data in parallel, as they are not optimized as processors for tasks such as periodic coefficient updates, decision- making control tasks. Combination of both the FPGA and DSP processor delivers an attractive solution for a wide range of applications. A hardware implementation of digital speech watermarking combined with speech compression, encryption on heterogeneous platform is made in this paper. It is observed that the proposed architecture is able to attain high speed while utilizing optimal resources in terms of area.
FUZZY BASED CASCADED MULTILEVEL SHUNT ACTIVE POWER FILTER FOR POWER LINE CONDITIONERS
Authors: YADAV B. SOUJANYA , RAMADEVI L. , MURTHY DR. P. S. R.
Published: January 2021

In this paper shunt active power filter is used to improve the power quality at distribution system. Due to nonlinear loads, current harmonics, unbalanced voltages and current and reactive power problems will be created in the network. The Instantaneous real power theory (IRPT) provides the real power calculation with PI controller will not provide accurate result and good performance under both steady state and transient state. Compensating above problems by using fuzzy based on Cascaded multi-level voltage source inverter. The inverter switching signals are generated based on the triangular sampling current controller provides power line conditioning. The Paper deals with three phase, five level cascaded multi level voltage source inverter based shunt active filter with PI and Fuzzy controller by using MATLAB/Simulink.
STUDIES ON GE-ON-INSULATOR MOSFETS USING METAL SOURCE/DRAIN CONTACTS FOR ANALOG/ MIXED SIGNAL APPLICATIONS
Authors: MONDAL CHANDRIMA , BISWAS ABHIJIT
Published: January 2021

In this paper, we report the effect of source/drain metal contacts on the electrical behavior of GeOI MOSFETs. The band diagram and current-voltage characteristics of the MOSFET are obtained using SILVACOATLAS, a 2D numerical device simulator, for various metals having a range of work function values. Our investigation reveals that the device using metals having a work function value more than 5 eV exhibits enhanced ON current, transconductance, intrinsic voltage gain, and also reduced subthreshold slope and OFF current.
EXPERIMENTAL INVESTIGATIONS OF CONVECTIVE HEAT TRANSFER OVER AN AIRFOIL SURFACE
Authors: EMANI SAMPATH , SEETALA SIDDHARDHA , KAPPAGANTULA SIVAYAZI
Published: January 2021

As experimentation becomes more complex, the need for the co-operation in it of technical elements from outside becomes greater and the modern laboratory tends increasingly to resemble the factory and to employ in its service increasing numbers of purely routine workers. This experimentation involves calculation of flow and Convective heat transfer characteristics of an airfoil. Firstly we are placing the airfoil in the wind tunnel having pressure distribution measurement equipment. There we are placing Digital 2 –component force measuring Transducer by which we are getting the lift and drag values acting on the airfoil .so from the above information we are going to calculate the coefficient of drag so that we can know design considerations so as to reduce the drag and lift force acting on the airfoil shaped bodies. Another parameter we are analyzing here is the temperature distribution at various points which requires an airfoil drilled at different points and counter sunken with respective screws for thermocouples insertion. Thermocouples are used to measure the reading of the temperature distribution at given points .Initially the reading is taken without any heat input to the airfoil specimen, after giving the heat energy externally we are going to determine the value of convective heat transfer from the airfoil element to the surroundings. So according to this we are going to temperature distribution of the airfoil.
FREE INTERACTOR MATRIX METHOD FOR CONTROL PERFORMANCE ASSESSMENT OF MULTI-VARIATE SYSTEMS
Authors: SARABI BEHROOZ KHEIRI , MAGHADE D. K. , MALWATKAR G. M.
Published: January 2021

In this paper, an alternative method for the assessment of multi-vitiate control loop performance with consider twocircumstances. First, known time delays between each pair of inputs and outputs, and second, without relying on any a priori knowledge about the process model or timedelays. The performance of the control loop is calculated from data driven autoregressive moving average (ARMA) and prediction error model. It is clear that the limited data in scalar measure used for performance assessment results tends to steady-state as time tends to infinity, but large number of samples gives risen in scalar measures and tends to infinity as time samples tends to infinity and therefore it becomes difficult to calculate the performance index. In this paper, the later problem is solved by considering initial part of scalar measures with steady value for next-to-next time samples to calculate the control-loop performance index which would be utilized to decide healthy working of the control loop. Simulation example is included to show the performance index of multi-variate control loop.
MECHANICAL DESIGN OF A LEGGED-WHEEL HYBRID QUADRUPED ROBOT FOR MULTI-TERRAIN NAVIGATION
Authors: UPADHYAY HARSHAL , JAISWAL GAURAV KUMAR
Published: January 2021

The two most common modes of locomotion used by humans are legged mode and wheeled mode, the former an inherent gift while the latter being an ingenious invention on their part. While both have their advantages, they may fall short in some aspects for instance, legs may fail in terms of high speeds and wheels might prove not so handy in the more demanding and uneven terrains Thus, a leg-wheel hybrid platform promises to ensure both high speeds and good stability on a variety of terrains .
NUMERICAL STIMULATION OF RAYLEIGH BERNARD CONVECTION IN WAVY ENCLOSURES
Authors: SUBHA S.
Published: January 2021

Enclosures are frequently encountered in practice, and heat transfer through them is of practical interest. Heat transfer in enclosed space is complicated by the fact that fluid in the enclosure, in general, does not remain constant. The fluid adjacent to the hotter surface rises and the fluid adjacent to the cooler one falls, setting a rotionary motion within the enclosure that enhances the heat transfer through the enclosure. This paper describes a numerical predication of heat transfer and fluid flow characteristics inside an enclosure bounded by horizontal wavy walls and two periodic straight vertical walls. Governing equation were discretized using an implicit finite difference method, based on finite volume approach. Simulation was carried out for a range of Rayleigh number (104-106) and Aspect ratio (0.35-0.75) for the fluid having Prandtl number 0.71. Results are presented by streamlines, isotherms and local Nusselt numbers. It is observed that flow and thermal field inside the enclosure are affected by the shape of enclosure and heat transfer rate increases as Rayleigh number increase.
Singular Value Decomposition Based Image Coding for Achieving Additional Compression to JPEG Images
Authors: J Rehna. V. , K Jeyakumar. M.
Published: January 2021

Computer technology these days is most focused on storage space and speed. Considerable advancements in this direction can be achieved through the usage of digital image compression techniques. In this paper we present a well studied singular value decomposition based JPEG image compression technique. Singular Value Decomposition is a way of factorizing matrices into a series of linear approximations that expose the underlying structure of the matrix. SVD is extraordinarily useful and has many applications such as data analysis, signal processing, pattern recognition, objects detection and weather prediction. An attempt is made to implement this method of factorization to perform second round of compression on JPEG images to optimize storage space. Compression is further enhanced by the removal of singularity after the initial compression performed using SVD. MATLAB R2010a with image processing toolbox is used as the development tool for implementing the algorithm.
A Hybrid Filter with Impulse Detection for Removal of Random Valued Impulse Noise from Colour Videos
Authors: Anusha S. , Kumar Hemanth , Chaitanya S.K.P.
Published: January 2021

This paper presents a three dimensional hybrid filter to remove random valued impulse noise from colour video sequences. The switching median technique is utilized to protect noise free isolated pixels from filtering so as to avoid blurring of frames. The restoration of noisy pixels is done by brightness information obtained from median filtering and chromaticity information is obtained from vector directional filtering. This hybrid filter is applied in three dimensional sliding window where spatial as well as temporal information about neighbourhood is available for restoration of frame under consideration. Only noise free pixels of three dimensional sliding window are used for restoration of frame under consideration. Simulation results show that the proposed three dimensional hybrid filter yields superior performance in comparison to other filtering methods
UNRESTRAINED MEASUREMENT OF ARM MOTION BASED ON A WEARABLE WIRELESS SENSOR NETWORK
Authors: SREENIVASULU SREENIVASULU , SUBBARAO N.
Published: January 2021

Techniques that could precisely monitor human motion are useful in applications such as rehabilitation, virtual reality, sports science, and surveillance. Most of the existing systems require wiring that restrains the natural movement. To overcome this limitation, a wearable wireless sensor network using accelerometers has been developed in this paper to determine the arm motion in the sagittal plane. The system provides unrestrained movements and improves its usability. The lightweight and compact size of the developed sensor node makes its attachment to the limb easy. Experimental results have shown that the system has good accuracy and response rate when compared with a goniometer.
STUDY AND ANALYSIS OF STATISTICAL FEATURES OF FACE EXPRESSION IN NOISY ENVIRONMENT
Authors: KASHYAP KANCHAN LATA , SHANTAIYA SANJIVANI
Published: January 2021

This paper presents a new approach for the recognition of emotions in noisy environment. The approach presents the cascading of Wiener filter and Mutation based bacteria optimization technique (MBFO) to remove the noise from the highly corrupted face image .After removing the noise by the combination of wiener filter and MBFO technique and then detects the local , global and statistical feature form the image. Bacterial foraging optimization algorithm (BFOA) is inspired by the social foraging behavior of Escherichia coli. BFOA has already drawn the attention of researchers because of its efficiency in solving real-world optimization problems arising in several application domains. In this research paper seven emotions namely anger, fear, happiness, surprise, sad, disgusting and neutral will be tested from database in noisy environment of speckle noise. facial expressions recognition system is based on a representation of the expression, learned from a training set of pre-selected meaningful features. However, in reality the noises that may embed into an image document will affect the performance of face recognition algorithms. Finally, emotion recognition will be performed by giving the extracted eye, lip and mouth blocks as inputs to a feed-forward neural network trained by back-propagation.
TEXTURE CLASSIFICATION USING WEIGHTED PROBABILISTIC NEURAL NETWORKS
Authors: KIRANMAYEE M. , SUBBARAO M.
Published: January 2021

Texture classification is basically the problem of classifying pixels in an image according to their textural cues. This is different from conventional image segmentation as the texture is characterized using both the gray value for a given pixel and gray-level pattern in the neighborhood surrounding the pixel. In this project, the novel temporal updating approach is developed for weighted probabilistic neural network (WPNN) classifiers that can be used to classify the textures. This is done by utilizing the temporal contextual information and adjusting the WPNN to adapt to such changes. Whenever a new set of images arrives, an initial classification is first performed using the WPNN updated to the last frame while at the same time, a prediction using PNN is also based on the classification results of previous frame. The result of both the PNN and WPNN are then compared. Compared to the PNN, WPNN includes weighting factors between pattern layers and summation layer of the PNN. Performance of this approach is compared with model based and feature based methods in terms of signal to noise ratio and classification rate.
Für jeden etwas
Authors: Jungbluth Thomas
Published: January 2021

Drucken: Moderne Drucker gibt es für die unterschiedlichsten Einsatzgebiete. Bestimmte Fähigkeiten, wie die Netzwerkfähigkeit oder die Ansprechmöglichkeit auch via Smartphone oder Tablet, sind inzwischen bei fast allen Geräten Standard. Von Thomas Jungbluth
MexAB-OprM and MexXY-OprM efflux pumps overexpression; additional mechanism for carbapenems resistance among nosocomial Pseudomonas aeruginosa isolates
Authors: M. Elbrolosy Asmaa , H. Elkhayat Amira , M. Hassan Dina , H. Salem Eman
Published: January 2021

Background: Multidrug-resistant pathogens have been on the rise during the last few years. Pseudomonas aeruginosa is commonly encountered in nosocomial infections with remarkable ability to develop antimicrobial resistance of which carbapenems are of great concern. Objectives: To explore the role of MexAB-OprM and MexXY-OprM efflux pumps overexpression as carbapenems resistance mechanisms among nosocomial P. aeruginosa isolates at both Menoufia and Kasr Al Ainy University Hospitals by phenotypic and molecular characterization methods. Methodology: A total of 120 P. aeruginosa isolates were collected from patients with hospital-acquired infections and subjected to antibiotic susceptibility testing by the Kirby-Bauer disk diffusion method. Carbapenems-resistant isolates were selected and investigated phenotypically for the contribution of MexAB-OprM and MexXY-OprM efflux pumps by both disk synergy and MIC reduction assays with cyanide-m-chlorophenyl hydrazone (CCCP) as an efflux pump inhibitor. Real time PCR assay verified the existence of mexA and mexX genes as regulators of MexAB-OprM and MexXY-OprM overexpression. Laboratory results were correlated with data regarding patients' clinical findings as well as risk factors. Results: Out of 120 P. aeruginosa isolates, 88 (73.3%) isolates were carbapenems-resistant of which 100% were MDR isolates. The highest resistance rate was for piperacillin and piperacillin/tazobactam (100% for each) and the lowest rate was seen against colistin (7.5%).The RT-PCR assay revealed that, 54/88 (61.3%) P. aeruginosa isolates harbored the target genes: 21 isolates (38.9%) were positive for mexA alone, 12 isolates (22.2%) were positive for mexX alone and 21 isolates (38.9%) showed co-existence of the two genes. In relation to PCR results, the sensitivity, specificity and accuracy of CCCP disk synergy test respectively were 46%, 94% and 64.8% while, those for MIC method were 88.9%, 55.9% and 76.1% respectively. Conclusion: Carbapenems resistance mediated by the overexpression of efflux pumps has also now emerged. Early recognition of this resistance mechanism to allow the use of alternative b-lactams is imperative.
La Perla de Lima
Authors: Garcia Barrón Carlos
Published: January 2021

La "mini-guerra" entre España y Perú, cuya única acción bélica es el bombardeo del puerto del Callao por la escuadra española el 2 de mayo de 1866, constituye un triste episodio en las relaciones bilaterales entre dichas naciones. No es éste el lugar para proceder a un análisis de las razones o sinrazones que culminan en el duelo de seis horas entre las cinco baterías de tierra y los treinta cañones de la flota española. Baste con decir que hasta el desenlace fue singular pues ambas partes se atribuyeron la victoria. La literatura que surge como resultado de este conflicto es escasa. Este artículo pretende una revisión de la misma.
Present and future aerosol impacts on Arctic climate change in the GISS-E2.1 Earth system model
Authors: Im Ulas , Tsigaridis Kostas , Faluvegi Gregory , Langen Peter L. , French Joshua P. , Mahmood Rashed , Manu Thomas , von Salzen Knut , Thomas Daniel C. , Whaley Cynthia H. , Klimont Zbigniew , Skov Henrik , Brandt Jørgen
Published: January 2021

Abstract. The Arctic is warming two to three times faster than the global average, partly due to changes in short-lived climate forcers (SLCFs) including aerosols. In order to study the effects of atmospheric aerosols in this warming, recent past (1990–2014) and future (2015–2050) simulations have been carried out using the GISS-E2.1 Earth system model to study the aerosol burdens and their radiative and climate impacts over the Arctic (>60° N), using anthropogenic emissions from the Eclipse V6b and the Coupled Model Intercomparison Project Phase 6 (CMIP6) databases. Surface aerosol levels, in particular black carbon (BC) and sulfate (SO42−), have been significantly underestimated by more than 50 %, with the smallest biases calculated for the nudged atmosphere-only simulations. CMIP6 simulations performed slightly better in simulating both surface concentrations of aerosols and climate parameters, compared to the Eclipse simulations. In addition, fully-coupled simulations had slightly smaller biases in aerosol levels compared to atmosphere only simulations without nudging. Arctic BC, organic carbon (OC) and SO42− burdens decrease significantly in all simulations following the emission projections, with the CMIP6 ensemble showing larger reductions in Arctic aerosol burdens compared to the Eclipse ensemble. For the 2030–2050 period, both the Eclipse Current Legislation (CLE) and the Maximum Feasible Reduction (MFR) ensembles simulated an aerosol top of the atmosphere (TOA) forcing of −0.39±0.01 W m−2, of which −0.24±0.01 W m−2 were attributed to the anthropogenic aerosols. The CMIP6 SSP3-7.0 scenario simulated a TOA aerosol forcing of −0.35 W m−2 for the same period, while SSP1-2.6 and SSP2-4.5 scenarios simulated a slightly more negative TOA forcing (−0.40 W m−2), of which the anthropogenic aerosols accounted for −0.26 W m−2. Finally, all simulations showed an increase in the Arctic surface air temperatures both throughout the simulation period. In 2050, surface air temperatures are projected to increase by 2.4 °C to 2.6 °C in the Eclipse ensemble and 1.9 °C to 2.6 °C in the CMIP6 ensemble, compared to the 1990–2010 mean. Overall, results show that even the scenarios with largest emission reductions lead to similar impact on the future Arctic surface air temperatures compared to scenarios with smaller emission reductions, while scenarios no or little mitigation leads to much larger sea-ice loss, implying that even though the magnitude of aerosol reductions lead to similar responses in surface air temperatures, high mitigation of aerosols are still necessary to limit sea-ice loss.
Confronting the opioid crisis with consumer health information: a look at East Tennessee
Authors: Grabeel Kelsey Leonard , Moore Jenny C.
Published: January 2021

Background: Starting in the 1990s, health care providers began prescribing opioids to patients as pain relievers, believing they were safe. However, many patients became addicted to these pills. In 2017, the US Department of Health and Human Services declared a public health emergency to fight the opioid epidemic. This crisis was prevalent in East Tennessee, where many residents were prescribed opioids.Case Presentation: Librarians at an academic medical center library in East Tennessee analyzed the health information requests related to pain, mental health, and addiction over the last fifteen years. We reviewed the pattern of requests related to these topics, the counties requesting this information, and the impact that these hospital policies had on these requests.Conclusions: From 2005 to 2014, there were few requests about mental health, pain, and substance abuse. However, once the library moved into the hospital and there was an increase in awareness of opioid addiction, requests on those topics increased. Most of the requests were about pain, with the height occurring in 2017, during which year the public health emergency to fight the epidemic was declared. Additionally, 2017 was the year the hospital implemented visitor limitations for patients with infections associated with intravenous drug use, which might explain the drastic drop in substance abuse information requests in 2018. Future outreach will target counties that have a high opioid prescription rate.
Unos apuntes inéditos de Arsenio Gutiérrez Palacios sobre las excavaciones de Diego Álvaro (Ávila)
Authors: Velázquez Isabel
Published: January 2021

Este trabajo realiza una revisión de las escasas noticias publicadas de las excavaciones en Diego Álvaro (Ávila) llevadas a cabo por Arsenio Gutiérrez Palacios, a las que no se ha prestado atención suficiente, y se dan a conocer unas informaciones inéditas sobre las pizarras visigodas halladas allí, que el autor dejó manuscritas. En estas páginas analizamos estas noticias y apuntes de trabajo manuscritos de Gutiérrez Palacios, para poner de manifiesto la necesidad de acometer un estudio sistemático sobre la Memoria de excavaciones que llevó a cabo el autor, mucho más amplia y sistemática que estas propias notas, y que aún permanece inédita