pinecone/core-2020-05-10-deduplication huggingface dataset:
Visual Targeted Advertisement System Based on User Profiling and Content Consumption for Mobile Broadcasting Television

Content personalisation is one of the main aims of the mobile media delivery business models, as a new way to improve the user’s experience. In broadcasting networks, the content is sent “one to many”, so a complete personalisation where the user may select any content is not possible. But using the mobile bidirectional return channel (e.g. UMTS connection) visual targeted advertising can be performed in a simple way: by off-line storing the advertisement for selectively replacing the normal broadcasted advertisement. In fact, these concepts provide powerful methods to increase the value of the service, mainly in mobile environments. In this article we present a novel intelligent content personalisation system for targeted advertising over mobile broadcasting networks and terminals, based on user profiling and clustering, as a new solution where the use of content personalisation represents the competitive advantage over traditional advertising
Acute effects of endurance exercise on jumping and kicking performance in top-class young soccer players

The aim of this study was to examine the acute effects of endurance exercise on jumping and kicking performance in young soccer players. Twenty-one top-class young soccer players (16.1±0.2 years) performed a countermovement jump test and a maximal instep soccer kick test before and after running for 20 min on a treadmill at 80% of their individual maximum heart rate. Two force platforms were used to obtain the following parameters during the countermovement jump: jump height, maximum power, maximum power relative to body mass, maximum vertical ground reaction force, maximum vertical ground reaction force relative to body mass, and maximum vertical ground reaction force applied to each leg. Maximum vertical ground reaction force and maximum vertical ground reaction force relative to body mass applied to the support leg during the kicks were also calculated with a force platform. The kicking motion was recorded using a three-dimensional motion-capture system. Maximum velocity of the ball, maximum linear velocity of the toe, ankle, knee and hip, and linear velocity of the toe at ball contact during the kicks were calculated. Non-significant differences were found in the parameters measured during the countermovement jump and the maximal instep soccer kick test before and after running, suggesting that the jumping and kicking performances of top-class young soccer players were not significantly affected after 20 min treadmill running at 80% of their individual maximum heart rate
A simple genetic algorithm for calibration of stochastic rock discontinuity networks

Este artículo propone un método para llevar a cabo la calibración de las familias de discontinuidades en macizos rocosos. We present a novel approach for calibration of stochastic discontinuity network parameters based on genetic algorithms (GAs). To validate the approach, examples of application of the method to cases with known parameters of the original Poisson discontinuity network are presented. Parameters of the model are encoded as chromosomes using a binary representation, and such chromosomes evolve as successive generations of a randomly generated initial population, subjected to GA operations of selection, crossover and mutation. Such back-calculated parameters are employed to make assessments about the inference capabilities of the model using different objective functions with different probabilities of crossover and mutation. Results show that the predictive capabilities of GAs significantly depend on the type of objective function considered; and they also show that the calibration capabilities of the genetic algorithm can be acceptable for practical engineering applications, since in most cases they can be expected to provide parameter estimates with relatively small errors for those parameters of the network (such as intensity and mean size of discontinuities) that have the strongest influence on many engineering applications
Mobile gaming: Industry challenges and policy implications

Mobile games are a prime example of a successful mobile application and demonstrate the increasing range of platforms for the media and entertainment industries. Against this convergent background, this paper introduces the basic features of the mobile gaming market and its industrial ecosystem together with its main actors and activities. The focus of the paper lies in the challenges ahead for the evolution of mobile applications into a potentially dominant game platform and the possible disruptions along this road. The deep personal relationships between users and their mobile devices are considered to further explore the link between mobile games, players’ strategies and pending techno-economic developments. The paper concludes with a brief discussion of some policy options to assist with the development of this domain
Electronic structure of copper nitrides as a function of nitrogen content

he nitrogen content dependence of the electronic properties for copper nitride thin films with an atomic percentage of nitrogen ranging from 26 ± 2 to 33 ± 2 have been studied by means of optical (spectroscopic ellipsometry), thermoelectric (Seebeck), and electrical resistivity measurements. The optical spectra are consistent with direct optical transitions corresponding to the stoichiometric semiconductor Cu3N plus a free-carrier contribution, essentially independent of temperature, which can be tuned in accordance with the N-excess. Deviation of the N content from stoichiometry drives to significant decreases from − 5 to − 50 μV/K in the Seebeck coefficient and to large enhancements, from 10− 3 up to 10 Ω cm, in the electrical resistivity. Band structure and density of states calculations have been carried out on the basis of the density functional theory to account for the experimental results
Using multimedia and peer assessment to promote collaborative e-learning

Collaborative e-learning is increasingly appealing as a pedagogical approach that can positively affect student learning. We propose a didactical model that integrates multimedia with collaborative tools and peer assessment to foster collaborative e-learning. In this paper, we explain it and present the results of its application to the “International Seminars on Materials Science” online course. The proposed didactical model consists of five educational activities. In the first three, students review the multimedia resources proposed by the teacher in collaboration with their classmates. Then, in the last two activities, they create their own multimedia resources and assess those created by their classmates. These activities foster communication and collaboration among students and their ability to use and create multimedia resources. Our purpose is to encourage the creativity, motivation, and dynamism of the learning process for both teachers and students
A practical approach to project management in a very small company

This article shows how a very small company has tailored Scrum according to its own needs. The main additions made were the “sprint design” phase and the “sprint test” phase. Before the sprint 0, the requirements elicitation and the functional specification were made in order to meet deadlines and costs agreed with clients. Besides, the introduction of an agile project management tool has supported all the process and it is considered the main success factor for the institutionalization of the Scrum process
A second-order numerical method for a cell population model with asymmetric division

Producción CientíficaPopulation balance models represent an accurate and general way of describing the complicated
dynamics of cell growth. In this paper we study the numerical integration of a model
for the evolution of a size-structured cell population with asymmetric division. We present
and analyze a novel and efficient second-order numerical method based on the integration
along the characteristic curves. We prove the optimal rate of convergence of the scheme
andweratify it by numerical simulation. Finally,weshow that the numerical scheme serves
as a valuable tool in order to approximate the stable size distribution of the model.Junta de Castilla y León (programa de apoyo a proyectos de investigación – Ref. VA191U13
Why There Isn't Intel-Level Causation in Mechanisms

The experimental interventions that provide evidence of causal relations are notably similar to those that provide evidence of constitutive relevance relations. In the first two sections, I show that this similarity creates a tension: there is an inconsistent triad between (1) Woodward's popular interventionist theory of causation, (2) Craver's mutual manipulability account of constitutive relevance in mechanisms, and a variety of arguments for (3) the incoherence of inter-level causation. I argue for an interpretation of the views in which the tension is merely apparent. I propose to explain inter-level relations without inter-level causation by appealing to the notion of fat-handed interventions, and an argument against inter-level causation which dissolves the problem
The spinal curvature of three different sitting positions analysed in an open MRI scanner

Sitting is the most frequently performed posture of everyday life. Biomechanical interactions with office chairs have therefore a long-term effect on our musculoskeletal system and ultimately on our health and wellbeing. This paper highlights the kinematic effect of office chairs on the spinal column and its single segments. Novel chair concepts with multiple degrees of freedom provide enhanced spinal mobility. The angular changes of the spinal column in the sagittal plane in three different sitting positions (forward inclined, reclined, and upright) for six healthy subjects (aged 23 to 45 years) were determined using an open magnetic resonance imaging (MRI) scanner. An MRI-compatible and commercially available office chair was adapted for use in the scanner. The midpoint coordinates of the vertebral bodies, the wedge angles of the intervertebral discs, and the lumbar lordotic angle were analysed. The mean lordotic angles were (mean ± standard deviation) in a forward inclined position, in an upright position, and in a reclined position. All segments from T10-T11 to L5-S1 were involved in movement during positional changes, whereas the range of motion in the lower lumbar segments was increased in comparison to the upper segments
Reaction pathways in the solid state synthesis of multiferroic BiFeO3

The obtaining of multiferroic BiFeO3 as a pure single-phase product is particularly complex since the formation of secondary phases seems to be unavoidable. The process by which these secondary impurities are formed is studied by analyzing the diffusion and solid state reactivity of the Bi2O3?Fe2O3 system. Experimental evidence is reported which indicates that the progressive diffusion of Bi3+ ions into the Fe2O3 particles governs the solid state synthesis of the perovskite BiFeO3 phase. However a competition is established between the diffusion process which tends to complete the formation of BiFeO3, and the crystallization of stable Bi2Fe4O9 mullite crystals, which tend to block that formation reaction
Intraply fracture of fiber-reinforced composites: microscopic mechanisms and modeling

The fracture behavior parallel to the fibers of an E-glass/epoxy unidirectional laminate was studied by\ud
means of three-point tests on notched beams. Selected tests were carried out within a scanning electron\ud
microscope to ascertain the damage and fracture micromechanisms upon loading. The mechanical behavior\ud
of the notched beam was simulated within the framework of the embedded cell model, in which the\ud
actual composite microstructure was resolved in front of the notch tip. In addition, matrix and interface\ud
properties were independently measured in situ using a nanoindentor. The numerical simulations very\ud
accurately predicted the macroscopic response of the composite as well as the damage development\ud
and crack growth in front of the notch tip, demonstrating the ability of the embedded cell approach to\ud
simulate the fracture behavior of heterogeneous materials. Finally, this methodology was exploited to\ud
ascertain the influence of matrix and interface properties on the intraply toughness
Opening up spaces through symbolic objects: harnessing students' resources in developing academic literacy practices in engineering.

This is an Accepted Manuscript of an article published by Taylor & Francis in English Studies in Africa on 30 January 2009. Available online: http://www.tandfonline.com/10.1080/00138390608691349.This article reports on one aspect of my PhD study, which I undertook as a teacher-researcher in the context of a first year Communication Course in a South African engineering foundation programme. The programme caters for students from less advantaged educational backgrounds and the course focuses on developing students' academic literacy in English. I argue that less regulated spaces need to be created in the curriculum in order to allow student resources to emerge and to be validated. These resources include English, indigenous languages, local knowledges, personal experience and multimodal competencies. By less regulated spaces, I mean classroom environments which require open tasks with no strict generic guidelines specified. Also, classroom environments which place less emphasis on assessment and more emphasis on creativity, and the use of students' own resources. I analyse the texts the students produce in one of these less regulated spaces in order to identify and describe the discourses that they draw on and propagate. Once visible, these discourses become resources for both teacher and students to draw on. I attempt to suspend 'teacherly' judgement, put learning and the formal curriculum aside and look at students' texts free of a norm-driven, evaluative eye in order to see the ways in which traces of their lives manifest
Coulomb barriers in the dissociation of doubly charged clusters

Producción CientíficaThe barrier height for the most asymmetric fission decay of doubly charged sodium clusters
(Na_N^2+) into singly ionized fragments has been computed with use of density-functional theory and
the jellium model. We have found that the barrier is sizable for large or intermediate-size clusters,
but vanishes for N<=9. We have also computed the energy DeltaH_e, needed to evaporate a neutral
monomer from Na_N ^2+. For N<=40, the barrier height is smaller than DeltaH_e and emission of a Na^+
ion is the preferred decay channel of hot Na_N^2+ clusters. On the other hand, the barrier height is
larger than DeltaH_e, for N>40 and, in this case, monomer evaporation becomes competitive. The critical
cluster size, N_c=40, for the transition from one decay mode to the other is in reasonable agreement
with the experimental result. Our calculations suggest that the mechanism for neutralmonomer
evaporation is different from the one currently assumed
Leisure activities and social factors influence the generation of cultural ecosystem service benefits

The relationship between cultural ecosystem services (CES) and the many diverse aspects of biodiversity is complex and multi-faceted. A large public survey in Wiltshire, UK, was used to assess associations between public benefits from certain species groups in the local countryside, and (i) social antecedents, (ii) engagement in different outdoor leisure activities (iii) indirect nature experience via media-related activities and (iv) species group charisma and abundance.

Practitioners of leisure activities with a nature-related theme, whether outdoor activities or indoor media-related activities, reported significantly higher levels of benefit from named species groups, as did respondents whose personal background demonstrated an elevated degree of nature-relatedness. Benefits were also related to the charisma of the species group: enhanced benefit through nature-related activities and social factors was significant for less charismatic species, but inconclusive for more charismatic species. Respondents who participated in outdoor leisure activities without a nature focus were unlikely to report enhanced benefits from species groups in the local landscape.

To maximise people’s CES benefits from broader aspects of biodiversity it may be necessary to encourage an active interest in biodiversity, leading people to participate or seek knowledge and understanding, and in turn develop a stronger sense of connectedness to nature
Detection of organic compounds in impact glasses formed by the collision of an extraterrestrial material with the Libyan Desert (Africa) and Tasmania (Australia)

Impact glasses are rich silica melted formed at high temperature and pressure by the impact of an extraterrestrial body on Earth.
Here, Libyan Desert glasses (LDGs) and Darwin glasses (DGs) were studied. Two non-destructive analytical techniques were
used to detect and characterize organic compounds present in their inclusions: Raman spectroscopy and scanning electron
microscopy coupled to energy-dispersive X-ray spectroscopy (SEM-EDS). Phytoliths, humboldtine, palmitic acid, myristic acid,
oleic acid, 4-methyl phthalic acid, and S-H stretching vibrations of amino acids were identified. The presence of these particular
organic compounds in such materials has not been reported so far, providing information about (a) the ancient matter of the area
where the impact glasses were formed, (b) organic matter belonging to the extraterrestrial body which impacted on the Earth, or
(c) even to current plant or bacterial life, which could indicate an active interaction of the LDG and DG with the surrounding
environment. Moreover, the identification of fullerene allowed us to know a pressure (15 GPa) and temperatures (670 K or 1800–
1900 K) at which samples could be subjected.Proyecto MINECO Retos de la Sociedad. Ref. ESP2014-56138-C3-2-
Two-Way Regionalized Classification of Multivariate Datasets and its Application to the Assessment of Hydrodynamic Dispersion

Zones of mixing between shallow groundwaters of different composition were unravelled by “two-way regionalized classification,” a technique based on correspondence analysis (CA), cluster analysis (ClA) and discriminant analysis (DA), aided by gridding, map-overlay and contouring tools. The shallow groundwaters are from a granitoid plutonite in the Fundão region (central Portugal). Correspondence analysis detected three natural clusters in the working dataset: 1, weathering; 2, domestic effluents; 3, fertilizers. Cluster analysis set an alternative distribution of the samples by the three clusters. Group memberships obtained by correspondence analysis and by cluster analysis were optimized by discriminant analysis, gridded over the entire Fundão region, and converted into “two-way regionalized classification” memberships as follows: codes 1, 2 or 3 were used when classification by correspondence analysis and cluster analysis produced the same results; code 0 when the grid node was first assigned to cluster 1 and then to cluster 2 or vice versa (mixing between weathering and effluents); code 4 in the other cases (mixing between agriculture and the other influences). Code-3 areas were systematically surrounded by code-4 areas, an observation attributed to hydrodynamic dispersion. Accordingly, the extent of code-4 areas in two orthogonal directions was assumed proportional to the longitudinal and transverse dispersivities of local soils. The results (0.7–16.8 and 0.4–4.3 m, respectively) are acceptable at the macroscopic scale. The ratios between longitudinal and transverse dispersivities (1.2–11.1) are also in agreement with results obtained by other studies.http://dx.doi.org/10.1007/s11004-005-5955-
PROQOS—Dynamic SLA Management in DiffServ Space Links

Several base elements for the provision of quality of service guarantees have been developed in the recent past. Of these, the Differentiated Services (DiffServ) architecture stands out as the most promising. In spite of this, various issues remain, especially when multidomain DiffServ services are concerned. In this case, some forms of distributed management of Service Level Agreements that allow the specification, exchange, enforcement and monitoring of quality of service data must be in place. Although, again, some isolated solutions exist for each of these problems, considerable effort is necessary to make them work together. The project presented in this paper tried to assess the feasibility of providing differentiated quality of service in satellite IP networks, by developing a dynamic Service Level Agreement management solution for an IP over Digital Video Broadcast Satellite system. The functionality of the implemented system comprises system configuration, dynamic SLA negotiation, QoS monitoring and metering, SLA conformance checking, and QoS reporting to customers.http://dx.doi.org/10.1007/s10922-004-0671-
Molecular cloning and characterization of cDNA encoding cardosin B, an aspartic proteinase accumulating extracellularly in the transmitting tissue of Cynara cardunculus L.

Cardosins A and B are related aspartic proteinases from the pistils of Cynara cardunculus L., whose milk-clotting activity has been exploited for the manufacture of cheese. Here we report the cloning of cardosin B cDNA and its organ, tissue and cytological localization. The cDNA-derived amino acid sequence has 73% similarity with that of cardosin A and displays several distinguishing features. Cardosin B mRNA was detected in young inflorescences but not in pistils of fully opened inflorescences, indicating that its expression is developmentally regulated. The proteinase, however, accumulates in the pistil until the later stages of floral development. Immunocytochemistry with a monospecific antibody localized cardosin B to the cell wall and extracellular matrix of the floral transmitting tissue. The location of cardosin B in the pistil is therefore clearly different from that of cardosin A, which was found at protein storage vacuoles of the stigmatic papillae and has been suggested to be involved in RGD-mediated proteolytic mechanisms. In view of these results the possible functions of cardosin B in the transmitting tissue are discussed.http://dx.doi.org/10.1023/A:101067501531
Another Approach to Topological Descent Theory

In the category Top of topological spaces and continuous functions, we prove that surjective maps which are descent morphisms with respect to the class E of continuous bijections are exactly the descent morphisms, providing a new characterization of the latter in terms of subfibrations E(X) of the basic fibration given by Top/X which are, essentially, complete lattices. Also effective descent morphisms are characterized in terms of effective morphisms with respect to continuous bijections. For classes E satisfying suitable conditions, we show that the class of effective descent morphisms coincides with the one of effective E-descent morphisms.http://dx.doi.org/10.1023/A:101208272687
Decoherence induced spontaneous symmetry breaking

We study time dependence of exchange symmetry properties of Bell states when
two qubits interact with local baths having identical parameters. In case of
classical noise, we consider a decoherence Hamiltonian which is invariant under
swapping the first and second qubits. We find that as the system evolves in
time, two of the three symmetric Bell states preserve their qubit exchange
symmetry with unit probability, whereas the symmetry of the remaining state
survives with a maximum probability of 0.5 at the asymptotic limit. Next, we
examine the exchange symmetry properties of the same states under local,
quantum mechanical noise which is modeled by two identical spin baths. Results
turn out to be very similar to the classical case. We identify decoherence as
the main mechanism leading to breaking of qubit exchange symmetry.Comment: 12 page