bluuebunny/crossref_metadata_2025_split huggingface dataset:
Exploring complex and big data
Authors: Stefanowski Jerzy , Krawiec Krzysztof , Wrembel Robert 
Published: January 2018

AbstractThis paper shows how big data analysis opens a range of research and technological problems and calls for new approaches. We start with defining the essential properties of big data and discussing the main types of data involved. We then survey the dedicated solutions for storing and processing big data, including a data lake, virtual integration, and a polystore architecture. Difficulties in managing data quality and provenance are also highlighted. The characteristics of big data imply also specific requirements and challenges for data mining algorithms, which we address as well. The links with related areas, including data streams and deep learning, are discussed. The common theme that naturally emerges from this characterization is complexity. All in all, we consider it to be the truly defining feature of big data (posing particular research and technological challenges), which ultimately seems to be of greater importance than the sheer data volume.
Actuator failure compensation for two linked 2WD mobile robots based on multiple-model control
Authors: Ma Yajie , Cocquempot Vincent , El Badaoui El Najjar Maan , Jiang Bin 
Published: January 2018

Abstract
This paper develops a new actuator failure compensation scheme for two linked two-wheel drive (2WD) mobile robots based on multiple-model control. First, a configuration of two linked 2WD robots is described, and their kinematics and dynamics are modeled. Then, a multiple-model based failure compensation scheme is developed to compensate for actuator failures, consisting of a kinematic controller, multiple dynamic controllers and a control switching mechanism, which ensures system stability and asymptotic tracking properties. Finally, simulation results verify the effectiveness of the proposed failure compensation control system.
Can Naturbanization Promote Environmentally Friendly Built-Up Areas? A Comparison Between Cadí-Moixeró (Catalonia, Spain) and Comana (Romania) Natural Parks
Authors: Tulla Antoni-Francesc , Stoica Ilinca-Valentina , Pallarès-Blanch Marta , Zamfir Daniela 
Published: January 2018

AbstractThe study compares the on-going naturbanization processes in and around two Natural Parks under the impact of newcomers, but also tourists from Barcelona and Bucharest and their metropolitan areas. The landscape value of these areas attracts the urban population, which contributes to local sustainable development process but also promotes construction. New businesses associated with rural multifunctionality and value-added activities related to environmental quality were identified. New residents have contributed introducing responsible patterns of consumer, ecoentrepreneurship by women, recovery of abandoned buildings and intensification of rural-urban relationships. Negative impacts such as intensive construction of second homes, with a lower use, in some areas around Cadí-Moixeró threaten biodiversity and habitat connectivity. Insufficient integration of environmental policies, particularly in the Comana wetlands, reduces the potential for rural renewal. Research methods included a review of the counterurbanization literature and the statistical data related to processes of naturbanization in both areas, along with the conduct of 30 structured interviews with key local actors in each area. Naturbanization still offers the potential to enhance local development; however, it is urgent to assess social perspectives in natural parks management in order to achieve environmentally friendly built-up areas.
Rural Tourism – Evaluating the Quality of Destination
Authors: Ryglová Kateřina , Rašovská Ida , Šácha Jakub 
Published: January 2018

Abstract
This paper concerns the topic of rural destination quality from the viewpoint of tourism development. The research exploring crucial quality factors from the viewpoint of demand is presented. Rural tourism participants attribute the highest significance to Destination cleanliness and Sense of security. The evaluation of the importance of most research quality factors is not dependent on gender and on the contrary, the importance of 16 quality factors depends on the visitor´s age. In the case of the factor of “Friendly acceptance by the locals”, the most significant influence on the visitor´s return to the destination was confirmed. On the contrary, this impact was not proven for the factor of “Level of prices of services and goods in the destination”. The research and the successive factor analysis revealed 6 dimensions representing the rural destination quality: Services, Image, Transportation, Well-being, Information/Communication and Attractions/ Experiences; Well-being was identified as the most important. This was consecutively confirmed by the analysis of the quality factors’ impact on the visitor´s overall satisfaction and loyalty to the destination. The research findings provide the theory with topical destination quality dimensions as well as contribute to better understanding of visitor´s behavioural mechanisms in rural areas.
Assessing the Regionality Degree of Regional Products o The Ustí Region (Czechia)
Authors: Hruška Vladan , Broumová Lucie , Píša Jan 
Published: January 2018

Abstract
In Czechia, especially in the last decade, there has been an unusual expansion of regional labelling of products, experience, and services. This trend confirms the paradigmatic change in the approach to rural development, as well as the growing popularity of alternative food networks and forms of consumption. The boom of regional labelling, however, can threaten the future perspectives of regional products. Too many regional or supra-regional labels (and subsequently too many regional products) can reduce the presented uniqueness of these products and increase the danger of them becoming mainstream. The aim of this paper is to assess regional products' relational intensity to a particular region. For this purpose, a specific method for the assessment of regional products of the Ústí Region (Czechia) has been developed and applied. The resulting “regionality degree” should express the rate of traditionality of each regional product. Based on the application of this methodological approach, the paper confirms the concern of the expansion of regional labelling, even on those products whose embeddedness in the region is relatively weak. The reason for this might also be the specific economic history of the region influencing the degree of regionality of given products or, more precisely, their existence, to some extent.
Assessment of the Environmental Tax System in Latvia
Authors: Jurušs Māris , Brizga Jānis 
Published: January 2018

AbstractEnvironmental taxes should play an important part in environmental policy as they help to internalize externalities, reduce damage, and increase the quality of life; besides they allow raising revenue for national and local governments. The aim of this paper is to evaluate environmental effectiveness, economic efficiency, equity impact, administrative feasibility and cost, and political acceptability of environmental (energy, transport, and natural-resource) taxes in Latvia. The study is based on desk research. The results demonstrate little evidence that existing environmental taxes lead to a significant reduction in environmental pollution and waste flows, but they have a significant fiscal effect. Most of the environmental taxes in Latvia apply direct and indirect subsidies, but most of the revenue comes from taxes on energy and transport. Environmental tax rates in Latvia are the result of political compromise and are not backed by the research on environmental costs of the particular activity. This paper fills the gap in environmental policy evaluation by looking at the performance and effectiveness of environmental taxes in Latvia.
Multi-Objective Weather Routing of Sailing Vessels
Authors: Życzkowski Marcin , Szłapczyński Rafał 
Published: January 2018

Abstract
The paper presents a multi-objective deterministic method of weather routing for sailing vessels. Depending on a particular purpose of sailboat weather routing, the presented method makes it possible to customize the criteria and constraints so as to fit a particular user’s needs. Apart from a typical shortest time criterion, safety and comfort can also be taken into account. Additionally, the method supports dynamic weather data: in its present version short-term, mid-term and long-term term weather forecasts are used during optimization process. In the paper the multi-objective optimization problem is first defined and analysed. Following this, the proposed method solving this problem is described in detail. The method has been implemented as an online SailAssistance application. Some representative examples solutions are presented, emphasizing the effects of applying different criteria or different values of customized parameters.
Assessment of Energy Use and Elimination of Co2 Emissions in the Life Cycle of an Offshore Wind Power Plant Farm
Authors: Tomporowski Andrzej , Flizikowski Józef , Opielak Marek , Kasner Robert , Kruszelnicka Weronika 
Published: January 2018

Abstract
Power stations in marine locations cause multi-faceted impact on the environment, man and the economy. There are not many studies devoted to modeling energy benefits for CO2 emissions. The paper presents the issues of assessing the efficiency of offshore wind farms, defined as the ratio of benefits to life cycle inputs. The scientific goal was to develop a mathematical model for efficiency in the design, manufacture, use and management of offshore wind power. The papers practical purpose is the experimental designation of the impact of selected post-use management methods, time of use and maritime location, i.e. average annual productivity of wind power plants on the efficiency of energy benefits from greenhouse gas emissions. The mathematical model of the integrated cost-benefit ratio has been developed for energy use assessment, taking into account the benefits generated by electricity production and the life-cycle CO2 emissions based on the LCA analysis using the CML method. Mathematical model validation was performed by determining the value of the indicator for an existing 2 MW offshore wind farm and comparatively for fossil fuel production: lignite, stone, fuel oil and natural gas. Analytical and research work carried out showed that the higher the efficiency index, the higher the value of the indicator. It has been shown that the location of the power station at sea produces more favorable CO2 elimination rates, due to higher productivity compared to in-land wind power plants. A more favorable form of post-consumer management for CO2 has been determined as recycling. It was found that for electricity generated from offshore wind farms, the value of the energy efficiency benefit from CO2 emissions is higher than for fossil fuel energy production.
Improvement of the Accuracy of the Orientation of an Object by Using a Pair of Rotating IMS
Authors: Kajánek Pavol , Kopáčik Alojz 
Published: January 2018

Abstract
Inertial measurement systems (IMS) belong among navigation systems which permit the monitoring of the position and orientation of an object in three-dimensional space. The functional principle of IMS is based on the integration of the output signal (acceleration and angular rate) of inertial sensors to the actual position and orientation of IMS. This integration causes the rapid accumulation of systematic IMS’s errors, which leads to a rapid increase in position and orientation errors over time. The paper deals with the design of a prototype for a pair of lowcost IMSs, which are regularly rotated around their vertical axis by stepper motors. To eliminate the systematic errors of gyroscopes in the direction of the rotation axis, two counter-rotating IMSs are used. An optimal model of the data processing was developed and presented.
Gender- and Muscle-Specific Responses During Fatiguing Exercise
Authors: Hill Ethan C. , Housh Terry J. , Smith Cory M. , Schmidt Richard J. , Johnson Glen O. 
Published: January 2018

Abstract
Hill, EC, Housh, TJ, Smith, CM, Schmidt, RJ, and Johnson, GO. Gender- and muscle-specific responses during fatiguing exercise. J Strength Cond Res 32(5): 1471–1478, 2018—The purpose of the present investigation was to examine potential gender-related differences in electromyographic (EMG) and mechanomyographic (MMG) responses during submaximal, concentric, isokinetic, forearm flexion muscle contractions. Twelve men and 12 women performed concentric peak torque trials before (pretest) and after (posttest) a fatiguing exercise bout that consisted of 50 submaximal (65% of concentric peak torque), concentric, isokinetic (60°·s−1), forearm flexion muscle contractions. Surface EMG and MMG signals were simultaneously recorded from the biceps brachii and brachioradialis muscles. There was a gender-related difference in the decline in absolute concentric peak torque for the men (23.8%) vs. women (18.5%) that was eliminated when covaried for differences in pretest concentric peak torque values. During the fatiguing exercise bout, EMG amplitude(AMP) increased and EMG mean power frequency (MPF) decreased for both genders and muscles. There were, however, muscle- and gender-specific increases, decreases, and no changes for MMG AMP and MMG MPF. The gender-related difference for the posttest decline in concentric peak torque was associated with differences in muscle strength which may have resulted in greater blood flow occlusion in the men than the women. The muscles with the most pronounced fatigue-induced neuromuscular responses were the biceps brachii in men and the brachioradialis in women. These findings may be related to gender differences in the usage patterns of synergistic muscles during a fatiguing task.
Carbohydrate Mouth Rinsing Does Not Prevent the Decline in Maximal Strength After Fatiguing Exercise
Authors: Black Christopher D. , Schubert Daniel J. , Szczyglowski Marcin K. , Wren Joshua D. 
Published: January 2018

Abstract
Black, CD, Schubert, DJ, Szczyglowski, MK, and Wren, JD. Carbohydrate mouth rinsing does not prevent the decline in maximal strength after fatiguing exercise. J Strength Cond Res 32(9): 2466–2473, 2018—Carbohydrate (CHO) rinsing has been shown to attenuate the decline of maximal voluntary contractions (MVCs) after fatiguing exercise—perhaps through a central mechanism. This study sought to determine the effect of a CHO rinse on MVC, voluntary activation, and contractile properties after fatiguing exercise. Thirteen adults participated in a double-blind, cross-over study. Maximal voluntary contraction of the dominant knee extensors was assessed, and voluntary activation (%VA) was determined using twitch interpolation. Participants then held 50% of MVC until volitional fatigue followed by a 20-second rinse with a solution of 8% maltodextrin (CHO) or placebo (PLA). Maximal voluntary contraction and %VA were reassessed immediately and 5 minutes after exercise. Maximal voluntary contraction did not differ between the CHO and PLA conditions initially (230 ± 90 vs. 232 ± 90 N·m; p = 0.69). Maximal voluntary contraction declined after exercise (p ≤ 0.01), but no differences were found between the CHO and PLA conditions (p ≥ 0.59). %VA did not differ between conditions (91.9 ± 2.9% vs. 91.5 ± 3.8%; p ≥ 0.11) nor did it change after exercise (p = 0.57). Twitch torque, rate of torque development, and rate of torque relaxation were reduced after exercise (p ≤ 0.05) but were unaffected by CHO rinsing (p > 0.05). Unlike a previous study, a CHO rinse did not preserve MVC after fatiguing exercise. This was likely due to a lack of central fatigue induced by the exercise protocol (as %VA was unaffected) as the CHO rinse is thought to work through a central mechanism.
An Experimental Study on Cement-Solidified Cd-Contaminated Soils under Drying-Wetting Cycles
Authors: Liu Huikai , Lu Haijun , Zhang Xiong , Li Jixiang , Wang Weiwei 
Published: January 2018

Abstract
Many human activities can produce and release cadmium (Cd) to air, water, and soils. Soils are the major sink for Cd released into the environment. Unlike organic contaminants, which are oxidized to carbon (IV) oxide by microbial action, Cd does not undergo microbial or chemical degradation, and its total concentration in soils persists for a long time after introduction. The excessive presence of Cd in soil poses great risks and hazards to human health and is detrimental to the ecosystem. In the past 50 years, cement-based solidification/stabilization (S/S) of heavy metal–contaminated soil has received increasing research attention, and its application has expanded because of its advantages over many other existing methods such as relatively low cost, good long-term effectiveness and performance, ready commercial availability, general acceptance by the public, etc. However, considering the lasting effect and environmental impact of the S/S method, as well as the complicated surroundings of cement-solidified Cd-contaminated soils, further research is needed. In this study, a comprehensive series of tests such as low-temperature nitrogen gas adsorption/desorption, permeability, and Cd leaching were performed to investigate the performance of Cd-contaminated soils solidified with 2 %, 5 %, 8 %, and 10 % of cement during a various number of drying-wetting (D-W) cycles. The focus was put on the cracking occurrences and evolution with the number of D-W cycles, their influences on the pore/crack size and distribution, hydraulic conductivity, and final concentration of Cd leaching. Based upon the analyses of the test results, some conclusions are drawn and the optimum percentage of cement treatment was suggested for the soils under investigation.
Single Bursts of Individual Granule Cells Functionally Rearrange Feedforward Inhibition
Authors: Neubrandt Máté , Oláh Viktor János , Brunner János , Marosi Endre Levente , Soltesz Ivan , Szabadics János 
Published: January 2018

The sparse single-spike activity of dentate gyrus granule cells (DG GCs) is punctuated by occasional brief bursts of 3–7 action potentials. It is well-known that such presynaptic bursts in individual mossy fibers (MFs; axons of granule cells) are often able to discharge postsynaptic CA3 pyramidal cells due to powerful short-term facilitation. However, what happens in the CA3 network after the passage of a brief MF burst, before the arrival of the next burst or solitary spike, is not understood. Because MFs innervate significantly more CA3 interneurons than pyramidal cells, we focused on unitary MF responses in identified interneurons in the seconds-long postburst period, using paired recordings in rat hippocampal slices. Single bursts as short as 5 spikes in <30 ms in individual presynaptic MFs caused a sustained, large increase (tripling) in the amplitude of the unitary MF-EPSCs for several seconds in ivy, axo-axonic/chandelier and basket interneurons. The postburst unitary MF-EPSCs in these feedforward interneurons reached amplitudes that were even larger than the MF-EPSCs during the bursts in the same cells. In contrast, no comparable postburst enhancement of MF-EPSCs could be observed in pyramidal cells or nonfeedforward interneurons. The robust postburst increase in MF-EPSCs in feedforward interneurons was associated with significant shortening of the unitary synaptic delay and large downstream increases in disynaptic IPSCs in pyramidal cells. These results reveal a new cell type-specific plasticity that enables even solitary brief bursts in single GCs to powerfully enhance inhibition at the DG-CA3 interface in the seconds-long time-scales of interburst intervals.SIGNIFICANCE STATEMENTThe hippocampal formation is a brain region that plays key roles in spatial navigation and learning and memory. The first stage of information processing occurs in the dentate gyrus, where principal cells are remarkably quiet, discharging low-frequency single action potentials interspersed with occasional brief bursts of spikes. Such bursts, in particular, have attracted a lot of attention because they appear to be critical for efficient coding, storage, and recall of information. We show that single bursts of a few spikes in individual granule cells result in seconds-long potentiation of excitatory inputs to downstream interneurons. Thus, while it has been known that bursts powerfully discharge (“detonate”) hippocampal excitatory cells, this study clarifies that they also regulate inhibition during the interburst intervals.
Historias de vida de comunicadores populares: búsquedas constantes de vida y de formación en liderazgo / Life stories of popular communicators: constant searches for life and training in leadership
Authors: Cifuentes Andrade Andrés Enrique 
Published: January 2018

Las historias de vida son una intensa y elaborada indagación de experiencias humanas individuales y colectivas. Son la interioridad de una persona expresada y vivida a través de mediaciones sicológicas, sociales y políticas, que a través de la vida de este encontrar el sentir vital y la mirada profunda de una comunidad en todo su entorno. Al interpretar los relatos de cuatro historias de vida de comunicadores colombianos para el cambio social, se identifican que el liderazgo es un aspecto en el cual no se ha trabajado de manera constante y clara en sus saberes y quehaceres comunicativos. De esa manera se muestran los hallazgos parciales y las relaciones encontradas entre el liderazgo-comunicación.
Participación política y periodismo: análisis de la cobertura de Televisión Española de la segunda asamblea ciudadana de Podemos / Political participation and journalism: analysis of the TVE coverage of the Podemos second citizens assembly
Authors: Bañon Castellón Lola 
Published: January 2018

ResumenEl incremento de la participación en la vida de los partidos políticos se ha mostrado como un ideal en los últimos años de la democracia española. Podemos, una de las formaciones de la llamada nueva política ha utilizado el voto telemático para establecer interconexión con sus inscritos y decidir sus estructuras organizativas y sus documentos políticos. A pesar de la ampliación de posibilidades de participación en las decisiones internas, la definición de visibilidades mediáticas se circunscribe al tándem Iglesias-Errejón y el debate interior encuentra límites en su representación externa. Este estudio trata de analizar los discursos derivados de la cobertura de Televisión Española del congreso de Vista Alegre para valorar la ausencia de la narración de la propuesta política y la conversión de la información en un relato basado en la confrontación y la épica. AbstractThe participation’s increase in the political parties has been shown as an ideal in the last years of Spanish democracy. Podemos, one of the so-called new policy groups has used the telematic vote to establish interconnection with its members and decide their organizational structures and political documents. Despite the expansion of possibilities for participation in internal decisions, the definition of media visibilities is confined to the Iglesias-Errejón tandem and the internal debate finds limits in its external representation. This study tries to analyze the discourses derived from the Televisión Española coverage of the congress of Vistalegre in order to evaluate the absence of the narration of the political proposal and the conversion of the information in a discourse based on the confrontation and the epic.