bluuebunny/crossref_metadata_2025 huggingface dataset:
Efficiency improvement with intelligent control of induction motor drives
Authors: R. Mecke
Published: July 2019

The energy saving potential of induction motor drives is investigated. Two new aspects are identified, a multilevel frequency inverter and the speed control with variable rotor flux. Multilevel inverters with new wide-bandgap semiconductors for low voltage electrical drives (<1000 V) reduce power semiconductor losses, voltage transients at the motor windings and harmonic losses in the cables. The power semiconductor losses of a two-level and a three-level inverter are compared. At 20 kHz switching frequency the losses of the three level inverter are 38 % lower compared to the two-level inverter. Another efficiency improvement potential is the speed control with variable rotor flux instead of commonly used constant flux. The rotor flux for maximum efficiency depends on the actual load and speed of the motor. The optimal rotor flux for maximum motor efficiency can be pre-calculated for each load and speed and implemented as reference value for rotor flux control in the frequency inverter. The maximum efficiency improvement with an 11 kW induction motor at small load reaches 35 % in motor and 45 % in generator operation mode. An increase in efficiency can be reached below 2/3 of rated torque in the whole speed range from 10 to 100 Hz.
Design and Analysis of Solar/Wind Power Electronics Converters
Authors: Akram A. Abu-aisheh
Published: July 2019

The primary objective of this paper is to present the design and analysis of a power converter for a hybrid solar/wind micro grid energy conversion system. The power converter can transfer the power from a wind generator and photovoltaic panels and improve the safety and stability of hybrid micro grid systems. This micro grid system consists of Permanent Magnet Synchronous Generator (PMSG), a full wave AC-DC bridge rectifier, a DC-DC boost converter, a bidirectional DC-DC converter, and a full wave bridge DC-AC inverter. The wind generator and the photovoltaic panels are used as the primary power sources of the system, and a battery is used for energy storage and to compensate for the irregularity of the power sources. This paper also presents the structure of the rectifier stage for the power conversion system. This structure provides two energy sources simultaneously yet independently, according to their respective availability. Analysis for the power conversion system will be discussed in this paper and will give a design and analysis plan for hybrid wind/solar converter circuit. The power converter can transfer the power from a wind generator and photovoltaic panel. The wind generator and the photovoltaic panel are used as the primary power sources of the system, and a battery is used for energy storage and to compensate for the irregularity of the power sources. This paper also presents the structure of the beginning rectifier stage for the hybrid wind- solar energy power conversion system. This structure thereby provides two energy sources simultaneously yet independently, according to their respective availability. Analysis for the power conversion system will be discussed in this paper and will give a design and analysis plan for hybrid wind/solar converter circuit.
Intensive Agriculture Production in Low Consumption Energy Environment
Authors: J. Galvão  , A. Nabais  , H. Correia  , P. Amaro  , A. Negrão  , V. Ribeiro
Published: July 2019

This work involves the study and dissemination of energy management practices for greater energy efficiency in a context of renewable energies, intensive production of flowers in greenhouses and the integration of data sensors, which enables the system to connect and exchange information from these systems to end users in a communication network. These several variavles can be monitored in real time with the support of the Internet of Things (IoT). It is intended to conceive a software and hardware prototype, in one new environment consumption, with the change for renewable energy sources, for better control of the variables involved in plant growth and more sustainability, in this intensive agricultural production sector.
A New Software Tool to Highlight Money Savings from a Demand-Side Management System for Home Appliances
Authors: Sébastien Bissey  , Sébastien Jacques  , Jean-Charles Le Bunetel  , Cédric Reymond  , Yves Raingeaud  , Philippe Ravier  , Guy Lamarque
Published: July 2019

In this article, a new software tool named “ECCO” is introduced. This one is intended to highlight money savings from a home electricity management system. The simulation is based on a complete database of real electricity consumption patterns of AC loads. Two case studies are particularly described to point out the relevance of such a simulation tool. The first one consists in postponing the power demand using the delay start function of home appliances. The second one enables to smooth the electricity consumption from a storage system coupled with a converter. The management strategy described in this article uses the difference between electricity prices in peak time and off-peak time. The results demonstrate that this strategy is currently not profitable in France, but it is much more cost-effective in countries, such as in Australia, where this gap of pricing is higher.
Methods for the verification of protective measures for safety of DC charging stations for electric vehicles
Authors: Daniel HERBST  , Robert SCHUERHUBER  , Ernst SCHMAUTZER
Published: July 2019

Due to the rising number of electric vehicles in operation the handling of charging stations concerning testing and personal safety has been becoming more and more a focus of interest in practice. Currently there are still open questions concerning safe installation, inspection and operation of such charging stations. This paper focuses on protective measures for safety and initial as well as periodic testing of DC charging stations. At the beginning of the work an overview of legal regulations and technical standards for charging stations is compiled. Further on different DC charging processes (of charging stations from different manufacturers in normal operation and in cases of faults) are measured as well as analysed. It shows that DC charging stations of different manufacturers react differently with regard to switch-off behaviour or switch-off times to various fault scenarios.
Technical and Economic analysis of a Regulatory Call for PV Plants with Energy Storage in French Islands
Authors: A. Chagnard  , B. Francois
Published: July 2019

European incentive policies led to a faster development of renewable energy sources. This energy transition is bringing new challenges, in particular for grid stability. Photovoltaic energy combined with electrical storage system is one of the most promising technology to enable a massive insertion of green energy into the grid. The task of this paper is to study a call for tender launched by the French government in French insular regions, to develop PV plants equipped with electrical storage systems. The technical sizing will be carried on, using the software PVsyst. Then, the energy flows between the PV panels, the battery and the grid will be optimized thanks to an algorithm. The purpose is also to study the benefits and costs of such a system, and so different scenario will be considered, each one leading to a different economic interest. More broadly, this paper considers the role of batteries today, and how it should be rewarded or compensated for service delivery.
Study of the requirements of an autonomous system for surface water quality monitoring
Authors: M. Barros  , P. Granchinho  , C. Ferreira  , P. Neves  , H. Magalhães  , L. Santos  , B. Lopes  , J. Marques  , H. Pinho  , S. Mourato  , A. Martins
Published: July 2019

In recent years, there has been increasing awareness of the preservation, protection and sustainable use of natural resources. Water resources, being one of the most important natural resources, face major threats due to contamination by pollutants of various types and origins. Maintaining the quality of water resources requires more robust, reliable and more frequent monitoring than traditional techniques of data collection based on sporadic, discontinuous and manual processes. The management of large geographical areas, the insufficient spatiotemporal discretization of the values of samples collected by traditional processes and the unpredictability of natural phenomena, require a new approach to data collection procedures. This article, which is the result of ongoing research, defines the technical requirements and technologies used in a continuous and regular monitoring of surface water quality in freshwater systems, whose data acquisition system helps to identify the sources of pollution and the contaminants flow along the waterways. The design of a versatile real-time water quality monitoring system, which, due to its environmental constraints should be based on renewable energies and wireless transfer of energy, will contribute to improve the management and effective protection of water resources.
Use of FACTS for Improving Voltage Stability in Mining Applications
Authors: J. L. Olabarrieta Rubio  , P. Eguia Lopez  , E. Torres Iglesias  , A. Etxegarai Madina
Published: July 2019

FACTS systems provide a well proven solution for actual different power system problems. FACTS devices can be effectively used for reactive power support, enhance controllability, improve stability and increase power transfer capability of AC transmission systems. This paper analyses the utilisation of FACTS systems in the expansion project of a mine, as an environmental solution for optimizing existing exploitations instead of opening new mines.
Monitoring Systems Parameters, Sensors and Technologies for Renewable Energies: Biogas Case Study
Authors: F.P. Silva  , R.B. Otto  , A.A. Braggio  , D.S. Kitamura
Published: July 2019

The pig farming brought a large generation of waste in confined places as an environmental problem. In the biological treatment of this waste, one of the by-products is the biogas. This source of energy has become a growing alternative for the increasing environmental problem in swine farming. With the generation of electricity from biogas it is possible that projects become feasible when investing in this renewable energy. However, with the usage growth, an effective monitoring is even more necessary in order to better understand the process and increase its efficiency. At this point, this work aimed to list parameters and sensors that can be used to monitor all stages of the processes. As a complement, it gives a general insight in two case studies that can be used as a basis for other similar studies.
Assessment of the Performance of Frequency Domain Models Based on Different Reference Points for Linearization
Authors: E. Tavukcu  , S. Müller  , J. Meyer
Published: July 2019

Power electronic-based loads are increasingly used in modern distribution systems. Such appliances inject harmonic currents into the power system and thus, they can have serious impacts on the power quality of the system. Therefore, it is necessary to find suitable frequency domain models of these loads to predict their contribution to the harmonic voltage levels. So far, various modeling approaches have been proposed in the relevant literature. Usually, they are parameterized based on laboratory measurements. In this paper, however, a circuit-based time domain model of a Compact Fluorescent Lamp (CFL) is implemented in MATLAB®/Simulink® and used for the parameter identification of three different frequency domain models. These models usually rely on a linearization of their emission characteristic and therefore, it is required to choose an appropriate reference voltage. As the supply voltage in real distribution systems is already distorted, the commonly made assumption of a sinusoidal reference voltage may increase the inaccuracy of models for strongly non-linear devices. Therefore, different reference points for the model parameterization are specified and their impact on the model performance under typical voltage distortions is studied.
Characterization of Production under feed-in tariffs in Portugal Mainland
Authors: M. Margalho  , P. Lourenço
Published: July 2019

EDP Serviço Universal (EDP SU), in its core business, must ensure the purchase of energy from producers under special regime and distributed production, with feed-in tariffs, and sell it through spot and future markets. Furthermore, the company must ensure the purchase of energy in those markets for the supply of its customers. The process of buying and selling electricity is quite complex from the legislative and regulatory point of view. In Portugal, over the last two and a half decades, high focus on the promotion of renewable energies has been set, particularly through power plants with feed-in tariffs, which has increased the use of internal energy resources and has stimulated the reduction of the country’s energy dependence. During this process, the development of related legislation and the dynamism of the sector, with the introduction of incentives which prompted the investment and promoted the maturation of new technologies, has been essential. The present work characterizes the producers to whom EDP SU purchases energy, with emphasis on technologies, number of installations, installed power, geographic location and acquired energy, showing the evolution over last years.
Study of biocarbon supported Fe2P particles for HER with energy applications
Authors: E. Leal da Silva  , G.R. Gonçalves  , Miguel A. Schettino Jr.  , Jair C. C. Freitas  , C.F. Malfatti  , A.  Cuña
Published: July 2019

Hydrogen gas (H2) is a molecule with several applications that can be used as clean and renewable fuel to produce electrical energy through its use in fuel cells. Although H2 can be found rarely in its pure form on earth, is possible to obtain it in large quantities from the water electrolysis. In this process, the electrochemical hydrogen evolution reaction (HER) occurs on the surface of a suitable electrocatalyst. Pt is one of the most studied and applied catalyst for HER but its low abundance and high cost discourage it application at large scale. This has stimulated the study of other types of catalysts based on non noble metals with low cost and available in large ammount. In the present work, a Fe2P/activated biocarbon composite sample was prepared from a porous carbon obtained by chemical activation of a lignocellulosic precursor. The prepared electrocatalyst presents good physicochemical and electrochemical properties for its application in HER, showing low overpotential for the hydrogen evolution (54 mV vs. reversible hydrogen electrode) and high Tafel slope of 120 mV dec-1. Future work should aim to improve the electrocatalytic stability of the material and to perform other experiments to elucidate the mechanism by which HER occurs on the electrocatalyst.
Photovoltaic charging multi-station with modular architecture for Light Electric Vehicles
Authors: Guillén-Arenas  , Francisco Jesús  , Fernández-Ramos  , José  , Gago-Calderón  , Alfonso
Published: July 2019

This paper deals with a modular architecture for recharging the batteries of light electric vehicles (LEVs) using a photovoltaic (PV) generator. The architecture is organized into two hierarchical levels. At the top level (master), a microcontroller tracks the maximum power point of the PV generator. This microcontroller executes a proportional-integral-derivative (PID) control algorithm whose output is the setpoint of the microcontrollers of the lower level. At the lower level (slaves), there is a microcontroller for each vehicle charging station. Each microcontroller controls the recharge current of the vehicle battery connected to the station by executing another PID control algorithm. Modular architecture allows the number of charging stations to be extended up to 112. Other characteristics of the system are the automatic detection of the nominal voltage of the battery (it allows to recharge batteries of 24V, 36V or 48V) and the inclusion of protection functions as battery overload or detection of not allowed batteries.
Estimation of required power and energy for bicycle electrification using global positioning system
Authors: D. Penić  , M. Štambuk  , N. Raičević  , M. Vražić
Published: July 2019

When designing an electric motor drive for a conversion of bicycle to an electric vehicle it is obligatory to determine the required power of the electric motor and the energy of a battery pack. By using a classical method, drive requirements can be established with speed and torque measurement on the drive wheel of the vehicle using a torque meter. The given traction profile is used for the design of the drive. This paper describes the method for estimation of power and required energy of vehicle only by means of global positioning system (GPS). When selecting a GPS device, it is necessary to take the resolution of the device and accuracy of vehicle speed and altitude into account. Using the measured track (speed and altitude profile) and the drag model of the vehicle it is possible to calculate both power that the vehicle develops, and energy consumed for a certain distance. The GPS device measurements, selection of electric drive, bicycle electrification and analysis of processed KTM Knoxville electric bicycle is presented.
Use of commercial TiO2 as direct ethanol fuel cell electrocatalyst support
Authors: L. M. M. Brasil  , C. F. Malfatti  , Andrés Cuña  , M. Cadorin  , L.A.S. Ries
Published: July 2019

Direct ethanol fuel cells (DEFCs) are efficient converters of chemical energy into electrical energy. DEFCs operate at low temperatures, and an anode, a cathode and an electrolyte are the main constituents. In alkaline media, electrocatalysts, responsible for promoting anodic and cathodic reactions, are generally composed of palladium supported on carbon black. Other materials have been studied in order to make the ethanol oxidation reaction (EOR) more efficient. In this work, the effect of commercial TiO2 as alternative support to Pd-based catalysts for the EOR was evaluated. The synthesized materials were characterized by X-ray diffraction, linear voltammetry and chronoamperometry, aiming to determine the effect of different supports on the performance of the EOR.
Transient Analysis of Electric Energy Distribution Systems with Distributed Generators during Contingencies
Authors: Wandry Rodrigues Faria  , Marcelo Escobar de Oliveira  , Jonas Villela de Souza  , Luis Gustavo Wesz  da Silva  , Ghunter Paulo Viajante
Published: July 2019

This paper analyzes the static and dynamic impact of the massive insertion of distributed generators into the distribution systems. For this study the IEEE 33-bus test system is represented on the Simulight platform. Three short-circuit situations are simulated. The results obtained in the simulations are compared with the operating ranges described in module 8 of the Electric Power Distribution Procedures in the Brazilian National Electric System. The comparison between the dynamic regimes of the test system with and without distributed generators points out the greater stability sensitivity of the synchronous generators used in industrial cogeneration projects and reaffirms the need to perform contingency simulations to determine the protection parameters of the installed generators.
COMPETITIVENESS-MAPPING OF RESTAURANTS BASED ON ITS PRODUCT AS A REFERENCE OF CULINARY TOURISM OBJECTS
Authors: Widi Nugraha Kristian Suhartadi , Suryaningsih Ika Barokah
Published: July 2019

This research is conducted to analyze the map positioning product attributes of Lestari restaurant and the competitors in Jember Regency. The basis used to determine the position of the restaurants is consumers’ perceptions regarding to the similarity of determinant attributes consisting of price, convenience, human resources services, taste quality, menu variants, location of each restaurant. The analysis technique is Multidimensional Scaling (MDS). This research was conducted by taking respondents as many as 60 respondents with purposive sampling method. The results of the restaurant positioning map (Lestari, Terapung, Legian, Wong Solo, Bu Lanny) are based on consumer perceptions and the similarity of respondents' attitudes in giving the assessment. Based on the analysis, there are differences in the position of each restaurant based on consumer perceptions and it shows that Lestari restaurant is direct competitor from Terapung restaurants, Wong Solo and Bu Lanny which do not have a strong or clear positioning, because they do not have many similarities and differences with other restaurants in the minds of consumers. Lestari and Legian restaurants are direct competitors because they have clear and unique differentiation. Therefore, Lestari restaurant in Jember Regency has a strong competitiveness in the market that comes from product attributes, namely the quality of taste and menu variants. The results of the consistency and similarity tests of respondents' attitudes also showed that the respondents did not have the same attitude in assessing the similarity of restaurants in Jember Regency.
Collaborative learning in kindergarten: Challenge or reality?
Authors: Zisopoulou Eleni
Published: July 2019

Collaborative learning is a twenty-first-century education trend with its main characteristic being the interaction among classmates. Collaborative learning in kindergarten, however, presents many difficulties, as preschoolers do not have advanced cooperation skills. As a result, teachers face challenges when applying this method. The study aimed to evaluate teachers’ opinions about collaborative learning. The study’s sample was composed of 107 kindergarten teachers in Greek schools. The tool was an improvised questionnaire that included personal characteristics of the sample, 14 multiple-choice questions on the application of collaborative learning and 33 questions regarding teachers’ opinions about collaborative learning. Analysis of the data has shown that collaborative learning is frequently used in kindergarten schools, even though almost half of the teachers have never attended a relevant training course. In addition, teachers have highly evaluated the results of the method, which includes social and cognitive skills and the effects of collaborative learning evaluation and skills advancement.
Gazing over the horizon: Will an equitable Green Climate Fund allocation policy be significant for the Pacific post-2020?
Authors: Samuwai Jale , Hills Jeremy Maxwell
Published: July 2019

The establishment of the Green Climate Fund (GCF) has increased expectations and optimism amongst developing countries, especially those that are particularly vulnerable to climate change. The GCF aims to channel a significant portion of global funds for climate change response, with a goal of reaching US$100 billion per year by 2020. Portrayed as a timely saviour to the climate finance needs of vulnerable countries, the allocation of GCF funds among countries will be key to low carbon and resilient futures. Its broad allocation policy increases the possibility that particularly vulnerable countries which have struggled to access international climate finance will continue to face such challenges. Adopting an equitable/fair principle of allocation, this article highlights a number of scenarios on the possible impact of the post-2020 climate financing environment on particularly vulnerable countries with a special focus on the Pacific Small Island Developing States (PSIDS). This study argues that PSIDS are extremely sensitive to GCF allocation mechanisms. While the study supports the notion of balanced allocation as currently advanced by the GCF, the precarious situation of PSIDS necessitates a re-think of how the GCF finance is to be allocated in the future.
Framing statelessness and ‘belonging’: Rohingya refugees in Bangladesh’s The Daily Star newspaper
Authors: Ubayasiri Kasun
Published: July 2019

Stripped of Myanmarese citizenship in 1982 and persecuted for three decades, stateless Rohingya have long found precarious refuge in neighbouring Bangladesh. This study explores the framing of the Rohingya in Bangladesh’s largest circulating English language newspaper The Daily Star, to examine how one of the nation’s most prominent newspapers of record framed refugee migration into the country. Analysing two distinct random samples of news stories published on The Daily Star website between 1 December 2011– 31 November 2012 and 1 August 2017–31 October 2017, this article argues that The Daily Star’s press identity, defined though a nationalist frame, failed to successfully deliver human rights-based journalism though a globalist Fourth Estate imperative.
The Transformation of the Higher Education System and Future Risks for the Welfare State in the Russian Federation
Authors:   Moscow State University of Education, Limonova Mariya Aleksandrovna , Sinyaev Maksim Viktorovich ,   Moscow State University of Education
Published: July 2019

The study discusses the welfare state development in the Russian Federation. The type of the welfare state depends on the long historical evolution of the state as an institution, its adaptation to changes in social relations in the industrial society. The welfare state was founded because of the need to fend off new social risks that did not exist in the agrarian society. Any society is capable of being a system that passes through certain stages of its development and interacts with the environment. While developing, society regularly finds itself in risky and unstable situations. Risk is an immanent feature of a complex and dynamic society. In the authors’ opinion, the Russian model of the welfare state was strongly affected by the rental economy. A nascent crisis of the rental economy is demanding the country’s transition to innovative ways of development. However, the transition has not still been the reality because of many reasons. They include the crisis of the domestic education system incapable of proper interacting with the rental economy. The decisions to reduce state-financed university admissions which have been taken over the past ten years can generate both economic problems and societal risks. These risks can block the development of the welfare state in the Russian Federation for the next decade.
Social Well-Being of the Evens in the Arctic Zone of the Republic of Sakha (Yakutia): A Sociological Aspect
Authors:   North-Eastern Federal University, Mayakunov Aleksandr Edisonovich
Published: July 2019

The study discusses the social well-being of the Evens, an ethnic group of the Arctic zone of the Republic of Sakha (Yakutia), based on a sociological survey of the indigenous peoples in the Ust-Yansky District in September 2018. The paper highlights the main social problems that concern the Evens in this region. The research identifies and analyzes the key factors in decreasing their social well-being and quality of life. The study proves that the modern arrangement of traditional natural resource use helps preserve and develop the traditional life models of the indigenous peoples of the North by granting them a wider set of rights and authorities in this field. The author determines that the state should provide the legal support for reindeer herding, fishery, hunting and other businesses of the Evens and the creation of tribal and family communities.
Human Capacity Development Management in the Arctic Region
Authors:   Industrial University of Tyumen, Gyurdzhinyan Aleksandr Sergeevich
Published: July 2019

The study discusses the category of human capacity, its structure and specific nature, the problems of managerial interactions during its establishment in the Arctic region. Special attention is paid to this concept as an integral element of social capacity in close connection with the resource and institutional capacities and aspects of their management. The paper presents several results of the author’s sociological research proving the theoretical conclusions. The author analyzes the opinions of respondents in the Arctic region on key indicators of human capacity such as public health, health care system, vocational education of future developers of the Arctic region, ethnic and regional education of the indigenous peoples of the North. The study proposes the key areas of improvement in the education system and relationships among residents of Northern settlements, government, and public organizations.
The Impact of Family on Educational and Career Choice in Russia and Germany
Authors:   Lomonosov Moscow State University, Savenkova Anastasiya Sergeevna
Published: July 2019

The study deals with the specific nature of career and educational choice of young people. The author highlights several categories of reasons that motivate parents to influence the child’s decision: social and cultural, economic, mental ones. The paper reveals their characteristics and a range of their manifestations in modern life. The study determines the prerequisites for the development of this type of behavior. In addition, there is a relationship of the child’s labor and educational preferences with the characteristics of intra-family relations, family structure. The empirical part of the study presents the results of a survey of Russian youth on the subject matter, a survey of Russian and German experts. The author identifies a significant similarity in the intra-family relations of large city residents in the field of education and employment choices; several differences can be explained by the social and cultural and economic aspects.
The Budget of the Elderly in China: the Strategy of Its Creation
Authors:   St. Petersburg State University, Wang Jingting
Published: July 2019

The research identifies and analyzes the strategies for generating personal revenue used by elderly people in China. The purpose of the study is to determine the personal budgeting strategies of the elderly in the People’s Republic of China. The methodological basis involves such areas of sociology as structuralism and network approach. These areas are outlined in relation to the assessment of the situation of elderly people in society. In addition, the study describes the relationship of this social group with society as a whole. An in-depth semi-structured interview has become an empirical method of data collection. In total, nine basic strategies have been identified that are typical for elderly residents of the city and village, men and women. The research notes that these strategies differ from the budgeting strategies of elderly people in Western countries.
Cooperativas pampeanas, recambio generacional y diversidad rural en las primeras décadas del siglo XXI. Estudio de la cooperativa agropecuaria Unión de Justiniano Posse
Authors: Carricart Pedro , Carricart Valeria , Albaladejo Christophe
Published: July 2019

Esta investigación se refiere a un análisis de las transformaciones de los vínculos entre las cooperativas agropecuarias pampeanas y sus socios, abordando este tema desde una mirada más amplia de transformaciones de las relaciones de “los productores” con “el mundo asociativo” y también con el territorio local y la actividad agropecuaria. El enfoque se centra específicamente sobre los recambios generacionales analizados en las siguientes dimensiones de la actividad agropecuaria: la dimensión privada (las diversidades familiares), la dimensión económica (la diversidad del trabajo) y la dimensión de la vida pública (la diversidad de participación en la cooperativa y otros ámbitos). En un contexto de profundas transformaciones de la actividad agropecuaria y de los territorios rurales, más aún en la zona núcleo pampeana, el objetivo es caracterizar la diversidad de productores vinculados a las cooperativas, sus formas de realizar la actividad agropecuaria y modos de participación, y qué nuevos estilos están adoptando estas relaciones con las cooperativas. Este abanico de diversidades está en efecto atravesado por las transformaciones producidas por los recambios generacionales. Tomamos el caso de la cooperativa Unión de Justiniano Posse de la localidad de San Marcos, en la provincia de Córdoba, situada en plena zona núcleo y que ha formulado una demanda de investigación sobre el tema de los recambios generacionales en la organización y en la actividad agropecuaria. La metodología de la investigación se enmarca entonces en la etapa de diagnóstico de una “investigación acción”. Asimismo, se trabaja con una base de datos elaborada sobre una muestra razonada de 50 miembros activos de esta cooperativa en esa localidad.
Plantas usadas en medicina popular en el sector sur de los humedales rioplatenses de la Provincia de Buenos Aires, Argentina
Authors: Hernández Marcelo Paulo , Calonge Felipe Santiago , Fernández Virginia Ruth , Sona María Florencia , Hernández María Victoria
Published: July 2019

Los humedales rioplatenses bonaerenses se extienden desde la localidad de Punta Lara hasta la localidad de Magdalena. Esta zona ha comenzado a degradarse desde finales del siglo XIX por la acción antrópica. El incumplimiento de las leyes de protección y conservación ambiental bonaerenses 11.723 y 12.756, ha acelerado la retracción areal de los humedales y la pérdida de su biodiversidad. La ley 12.756, declara Paisaje Protegido de Interés Provincial para el desarrollo ecoturístico al área del norte y centro de los humedales rioplatenses comprendida entre la Isla Santiago y el balneario Bagliardi, sin incluir su extremo sur que se extiende desde el balneario La Balandra hasta la zona ribereña de las localidades de Atalaya y Magdalena. Existiendo estudios previos sobre el valor alimenticio, condimentario y medicinal de numerosas especies vegetales presentes en el norte y centro de estos humedales, realizamos un inventario informativo de las especies vegetales medicinales utilizadas por los habitantes del extremo sur de esta ribera, comprendido entre las localidades de Atalaya y Magdalena, con el fin de revalorizar este recurso fitoterapéutico, como un nuevo elemento a ser tenido en cuenta por el Poder Legislativo y Judicial de la Provincia de Buenos Aires, para la protección y conservación de los humedales en toda su extensión. El inventario incluye: nombre científico, nombre vulgar, familia, hábito, origen geográfico y estatus, uso medicinal, parte del vegetal utilizada para la elaboración del producto fitoterapéutico y forma de preparación y de administración del producto medicinal.
Palacio sive teatro: villas y palacios del Renacimiento según la tipología del teatro clásico
Authors: González Román Carmen
Published: July 2019

La planimetría del anfiteatro y del teatro clásico está presente de forma explícita o metafórica en la arquitectura palaciega del Renacimiento. Este trabajo pretende mostrar, a partir de la obra de grandes arquitectos italianos del período, cómo la imagen del clasicismo romano latente en aquellos insignes monumentos de la Antigüedad fue utilizada para diseñar la vivienda de una egregia clientela
La ermita de la Cruz del barrio del Molinillo (capilla de la Piedad) y sus pinturas murales
Authors: Camacho Martínez Rosario , Arcos von Haartman Estrella
Published: July 2019

El articulo presenta el proceso de formación y significación de la ermita de la Cruz del Molinillo, hoy de la Piedad, analizando las pinturas murales que cubrían sus paramentos exteriores, recientemente descubiertas con motivo de su próxima demolición, cuyo interes patrimonial ha determinado su arranque y la construcción de una nueva ermita en la que se ubicaran dichas pinturas.
El valor patrimonial de las pinturas murales de Málaga
Authors: Asenjo Rubio Eduardo
Published: July 2019

Con la valoración de las pinturas murales, el color histórico de la ciudad, se continúa esta llamada de atención sobre esa parcela menoscabada del patrimonio cultural, leyendo y analizando los valores que le son propios, entendidos como vectores necesarios para la recuperación de la imagen de la ciudad.
Salus infirmorum. Mito e iconografía de la Virgen de la Salud en la escultura española
Authors: López-Guadalupe Muñoz Juan Jesús
Published: July 2019

La riqueza de las manifestaciones artísticas de temática mariana en España constituye un hecho de indiscutible interés histórico e iconográfico. De entre la pluralidad de advocaciones que recibe la figura de la Virgen, la de la Salud sirve de excusa para constatar esta variedad iconográfica en el género escultórico, examinar algunos de sus ejemplos de mayor interés artístico y explicarlos en un contexto simbólico que mitifica con orígenes legendarios la aparición de las imagenes de devoción o incluso su misteriosa autoría.
Nuevos prototipos femeninos para el cruce de siglos (XIX-XX): de la mujer germánica a la Isolda wagneriana
Authors: Jiménez Fernández Lourdes
Published: July 2019

En el llamado Cruce de Siglos (XIX-XX), aparecieron unos nuevos prototipos femeninos importados su mayoría desde latitudes nórdicas: Ondinas, Loreleys, Walkirias, doncellas medievalizantes de antiguas leyendas... que se incorporaron con fuerza al panorama plástico del momento bajo los postulados del Simbolismo y el Art Nouveau. Mas será el prototipo de Mujer Germánica característico de un nuevo modelo de mujer real, fuerte, de físico imponente, el que se convierta en referente general de otros nuevos prototipos femeninos como las heroínas de los dramas wagnerianos: Brunilda, Kundry, Isolda, Elsa ... Por tanto partimos del modelo general al particular de Isolda, para ver cómo son interpretados por los artistas del momento.
Nuevos datos para la biografía del escultor Pedro de Mena
Authors: López-Guadalupe Muñoz Juan Jesús
Published: July 2019

La biografía de Pedro de Mena está jalonada de éxitos profesionales que le reportaron prestigio y posición. El conocimiento de su trayectoria vital se incrementa ahora con cierta correspondencia que revela cómo el escultor servía de agente comercial en Málaga para el cabildo de la Catedral de Granada. Por la fecha de esas cartas (1675-1677), deben ponerse en relación con la ejecución de las estatuas orantes de Jos Reyes Católicos para la capilla mayor de esa Catedral.
Antonio Palomino, tasador de la colección pictórica de don Pedro Ignacio de Arce, caballero de la Orden de Santiago (1693)
Authors: Barrio Moya José Luis
Published: July 2019

Acisclo Antonio Palomino y Velasco nació en la localidad cordobesa de Bujalance, siendo bautizado en la iglesia parroquial de aquella localidad el día 1 de diciembre de 1655, falleciendo en Madrid en agosto de 1726, vivió pues 71 años que desde luego fueron bien aprovechados en una carrera llena de éxitos y de importantes encargos.
Campillo Garrigós, Rosa: La Gestión y el Gestor del Patrimonio Cultural
Authors: Pineda Carbó María Ana
Published: July 2019

Asistimos a una etapa en la que, siendo conscientes de la importancia que el Patrimonio Cultural supone para el hombre y su historia, se afianza en términos cada vez más perfilados la figura del profesional especializado en esta disciplina, el Gestor de Patrimonio Cultural.
Lapierre, Alexandra: Artemisia
Authors: Martínez Silvente María Jesús
Published: July 2019

La figura de Artemisia Gentileschi (1593-1653) -primera mujer pintora de incuestionable relevancia- ha permanecido injustamente alejada del estudio artístico y de la investigación hasta fechas bien recientes.
Anónimo: Segunda parte de los soñados regocijos de la Puebla
Authors: González Acosta Alejandro
Published: July 2019

Siempre regocija que lo oculto salga a la luz y cuando esta revelación deseada expone un documento que ayuda para perfilar mejor las huellas que nos vienen del pasado, la alegría se acrecienta y estimula. Es el caso de la publicación del manuscrito hasta hoy inédito de una pieza que la pasión acuciosa de José Pascual Buxó rescató del olvido, para iluminar un rincón aún penumbroso de la literatura novohispana...
García Torralbo, M.ª Cruz: Baeza Conventual. El espacio conventual en el contexto urbano de Baeza en los siglos XVI y XVII
Authors: Rodríguez Marín Francisco José
Published: July 2019

Desde que hace ya casi cinco décadas, Luis Cervera Vera acuñara el acertado término de ciudad conventual, quedó definido el aspecto más relevante de muchas de nuestras ciudades del Quinientos y del Barroco. Baeza, que en el siglo XVI acogía una población de 4.487 habitantes, mantuvo a diecisiete conventos, de los que quince fueron fundados durante esta centuria.
Gauguin, Paul: Escritos de un salvaje
Authors: Montijano Cañellas Marc
Published: July 2019

Gauguin personaje mítico, la leyenda de un espíritu seguro de ser grande, un hombre incomprendido que se sabía gran artista. Mil historias se cuentan sobre este salvaje, todas ellas falsas, todas ellas verdaderas. Siempre con hambre, en la miseria, sin ganas de pintar, con la muerte acechando, y sin embargo, siempre gozando, viviendo en la hermosura de un lugar idílico repleto de olores, colores y sabores intensos.
AA. VV.: MOMO Andalucía. Arquitectura del Movimiento Moderno en Andalucía 1925-1965
Authors: Arjones Fernández Aurora
Published: July 2019

En los últimos años, el catálogo se ha incorporado de una forma decidida al acervo instrumental de los profesionales de la cultura, con especial incidencia en el mundo del arte. Hace permanente lo temporal. Presenta el estado de la cuestión. Aporta nuevos puntos de vista a la imagen consagrada del objeto. Coadyuva a la actualización del tema a partir del compendio de las aportaciones con mayor repercusión en el foro académico. Rejuvenece la imagen del objeto de estudio.
Balló, Jordi y Pérez, Xavier: La semilla inmortal. Los argumentos universales en el cine
Authors: García Gómez Francisco
Published: July 2019

Prácticamente desde su nacimiento, el cine recurrió -y sigue recurriendo- a todo el rico acervo narrativo de las diferentes culturas mundiales. Desde que el hombre es hombre, ha dedicado algunos de sus más creativos esfuerzos a contar historias, tanto verdaderas corno falsas. Y el cine es, aparte de una gran ilusión (y de otras muchas cosas), un magnífico medio para narrar historias.
Common Femoral Artery Diameters Determined by Doppler Ultrasonography
Authors: Irina Prună Ion , Carmen Ciufu , Petru Bordei
Published: July 2019

Common femoral arteries diameters (left and right) were studied, on a number of 60 cases (26 women and 34 men) with a General Electric – Voluson 730 Expert ultrasonograph. The diameters of the common femoral arteries, left and right, were measured in three points: proximal, middle and inferior, in 60 cases as it follows: 26 cases on women (43,33%) and 34 cases on men (56,70%). Regarding the proximal third of the right common femoral artery, the diameter range was found between 6,1 and 8,9mm, in women being between 6,2-7,9mm, and in men between 6,1-8,9mm. The diameter of the middle third had values between 5,8-9,7mm, in women ranging from 6,1 to 7,8mm, and in men from 5,8 to 9,7mm. At the level of the inferior third, the femoral artery had a diameter between 6,8-12,7mm, in women ranging from 6,5 to 9,8mm, and in men from 6,3 to 12,7mm. The common left femoral artery, in its proximal third had a diameter with values between 5,7 – 9,9mm, in women from 6,2 to 8,0mm, and in men being between 5,7-9,9mm. In the middle third the values were found between 6,1-9,8mm, in women being from 6,6 to 7,9mm, and in men from 6,1 to 9,8mm. Regarding the inferior third, the diameters had values between 7,0-12,5mm, in women ranging from 7,1 to 10,5mm, and in men, from 6,8 to 12,5mm.
Liposomal-lipopolysaccharide vaccine extracted from Proteus mirabilis induces moderate TLR4 and CD14 production
Authors: Nile Ruaa SH. , Darweesh Mayyada F. , Al-Rufaie Mohauman M.
Published: July 2019

Proteus mirabilis is a common cause of recurrent urinary tract infections in individuals with functional or structural abnormalities. It also forms bladder and kidney stones. Lipopolysaccharide (LPS) is a potential Proteus virulence factor that plays a key role in pathogenesis, as well as in stimulating innate immune response. Therefore, this study aimed to extract LPS from a highly resistant isolate and incorporate it in a delivery system (liposome) to stimulate an immune response against virulent pathogens. In the work, 50 isolates of P. mirabilis were taken from 200 urine specimens obtained from recurrent-urinary tract infections (UTI) of patients of AL-Sadar Hospital. Specimens were cultured on specific media, and then bacterial isolates were identified via morphological, biochemical and Vitek-2 systems. The results showed that P. mirabilis was expressed in 11 (22%), 30 (60%) and 9 (18%) recurrent UTI, kidney stone and catheter samples, respectively. All isolates were assessed through antibiogram testing, with the results revealing that most isolates were multidrug resistant to more than 3 classes of antibiotics. Herein, P. mirabilis NO 50 revealed particularly high resistance, so it was chosen for LPS extraction. Lethal dose 50 (LD50) observations indicated that a live suspension of P. mirabilis was at 4.5×107 CFU/ml, while LPS was at 270 μg/ml. LPS was used as an immunogenic to stimulate the immune system through injecting Rats intraperitoneally (I.P.) with 1 ml of LD50%. Subsequently, the efficiency of immunogenes in stimulating the immune response was evaluated by determining the Toll-like receptor and CD14 levels. The results indicate that LPS incorporated in the Liposome released moderate levels of Toll-like receptors-4 (TLR4) that enabled the immune system to clear pathogens. The LPS+ complete Freund’s adjuvant (CFA) and LPS vaccinated groups recorded hyper production for TLR4 (52.2 and 40.9 pg/ml, respectively), this was followed by liposome (LIP) and bacterial suspension (11 and 20.5 pg/ml, respectively) in ranking effectiveness. This study reveals a mean of CD14 that was higher in both LPS and LPS+CFA and moderate in LPS+LIP, in comparison with control and liposome groups.

In conclusion, LPS-Liposomes are a promising nanomedicine for modulating the hyper response of LPS. This may lead to tissue inflammation but appeared beneficial in stimulating the immune response at moderate levels so as to eradicate infection without tissue damage.
Evaluation of the combined effects of doxorubicin and bortezomib on the human acute lymphoblastic leukemia cell line
Authors: Korga Agnieszka , Humeniuk Ewelina , Adamczuk Grzegorz , Iwan Magdalena , Ostrowska Marta , Luszczewska-Sierakowska Iwona , Dudka Jarosław
Published: July 2019

Increasing numbers of oncological patients and growing drug resistance ensure that new methods of cancer treatment are intensively sought. Combining drugs for a synergistic effect is one of several possible ways to mitigate this problem. This leads to reducing the effective drug dose and the occurrence of side effects. Doxorubicin (DOX) is an antineoplastic agent that has several mechanisms of action. DOX intercalates between base pairs of DNA helix, inhibits topoisomerase II and also forms reactive oxygen species. Bortezomib (BZT) is an antitumor agent belonging to the group of proteasome inhibitors. It has been observed that BZT triggers an oxidative stress response in vitro and in vivo.

Accumulation of oxidatively damaged proteins and the simultaneously blocking of the proteasome can be very damaging to the tumour cell. For this reason, the aim of the study was to assess the potentially synergistic effect of DOX and BZT on human acute lymphoblastic leukemia (ALL). In the work, the cells were treated with both agents and their combinations and the effect was evaluated on the basis of morphological assessment, MTT assay and level of reduced glutathione measurement.

The study has shown that on acute lymphoblastic leukemia cells, synergistic effects came about in the combination of 1nM BZT with a wide range of concentrations of DOX. Herein, the visible, coactive effect of DOX and BZT was observed on oxidative stress levels. This phenomenon can be essential in blunting the possibility of rapid manifestation of resistance seen in BZT monotherapy. In addition, the needed very low concentrations of DOX reduce the risk of therapy side effect.