Miracle-dz/UniFAR-FTUs huggingface dataset:
Learning from video

Leergedrag studenten gebaat bij betere mediaspelers Studenten die leren van video’s zijn gebaat bij mediaspelers die meer opties bieden bij het zoeken naar specifieke delen van een filmpje. Voor het leereffect is het belangrijk dat het eenvoudiger wordt om een bepaald fragment nog eens terug te kijken. Dat stelt Jelle de Boer, die promoveert op een onderzoek naar de kijkpatronen van studenten bij het bestuderen van video’s. De Boer onderzocht het kijkgedrag van studenten in verschillende experimenten. Studenten kregen daarbij onder meer een instructie over mogelijk alternatief kijkgedrag, om te onderzoeken in hoeverre die alternatieve strategie hun leereffecten zou verhogen. De Boer vond dat de leereffecten van kijkers met een smal kijkrepertoire lager waren dan de leereffecten van strategische kijkers en studenten met een breed kijkrepertoire. Studenten met enige basiskennis over de onderwerpen die aan bod kwamen in de video’s hadden het meeste voordeel van het gebruik van mogelijk alternatief kijkgedrag en studenten met weinig voorkennis hadden het minste voordeel. De leerwinst van studenten met weinig voorkennis verdween na een aantal weken; kennisverwerking lijkt slecht te gaan wanneer twee dingen tegelijk worden gedaan.
THE INFORMATION CONTENT OF ABNORMAL TRADING

This paper investigates the role of abnormal trading volume on the Italian equity market as revealing new information. In an efficient market, volume should be correlated to simultaneous returns, but should have no predictive power for future returns. When new information arrives in the market, prices should adjust to a new equilibrium and the increase of volume should be the natural effect of informed trades. However, empirical evidence documents that the release of new information, price changes and volume increases are not necessarily simultaneous phenomena, as market efficiency would suggest. If information is not perfectly spread out in the market, but rather held by more informed traders, observation of trading volumes may enhance the information set. The hypothesis is that large changes in volume, especially when not accompanied by any news disclosure, incorporate a non-public information content and signal future excess returns. Evidence confirms this intuition. I find strong excess returns (higher when no new information is simultaneously released) around extreme trading levels and strong evidence of price continuation, even though mainly concentrated on the day after the event. The magnitude of post-event excess returns is also profitably tradable with a portfolio strategy. These findings strongly corroborate the hypothesis of an information content of abnormal volume. Acknowledgements: I wish to thank the anonymous referees for the valuable suggestions and Marco Bigelli, Sandro Sandri, Raghavendra Rau, Nikhil Varaiya, Ariadna Dumitrescu, Petko Kalev and Antonio Della Bina for their precious comments. I thank Elena Sapienza and Stefano Mengoli for providing me with some of the data. I am the sole responsible for any remaining errors.
Grossman personality facets among partner-violent men in prison 1

Assessment of personality is one of the key yet most difficult issues in the study of violent behavior. Recent research on intimate-partner violence highlights the need to describe offender typologies in order to tailor interventions to their needs. The Millon Clinical Multiaxial Inventory-III (MCMI-III) is commonly used in clinical and forensic settings, and Grossman facets are the latest additions to this instrument. They allow a more molecular diagnosis and may provide greater predictive ability when assessing violence. This study examines MCMI-III Grossman facets in 175 partnerviolent men in prison. The results suggest the existence of three personality profiles that differ in their personality pathology severity, from lower pathological (Group 1; 27%) to greater pathological (Group 3; 30%). Subjects in Group 3 are more likely to show pathologies related to paranoid, sadistic, antisocial, negativistic, and borderline facets, which are all related to violent behavior. This group reported significantly more psychological aggression and minor sexual coercion (using the Conflict Tactics Scales2, CTS-2), however, no differences regarding physical violence were found. Implications of these findings for interventions with intimate partner violence perpetrators are discussed.
Large-scale molecular dynamics simulations of cluster impact and erosion processes on a diamond surface

Single ${\mathrm{Ar}}_{n}$ or $({\mathrm{CO}}_{2}{)}_{n}$ $(n\ensuremath{\simeq}960)$ cluster impacts on a diamond (111) surface are studied by large-scale molecular dynamics simulations in order to investigate highly energetic cluster-surface interactions. For a cluster impact energy ${E}_{a}$ of 100 keV, a hemispherical crater and multilayered shockwaves are observed. Rebounding hot fluidized carbon material is seen to replenish the transient crater very quickly, with a central peak appearing as a long time phenomenon in the case of a ${\mathrm{CO}}_{2}$ cluster impact. Transient craters develop also for lower impact energies of $30l~{E}_{a}l~75\mathrm{keV}$ while only an elastic deformation is observed for ${E}_{a}=10\mathrm{keV}. $ The volume of the transient crater is approximately proportional to ${E}_{a}$ while the volume of the plastically deformed region and the kinetic energy transfer via the shockwave are linear functions of ${E}_{a}$ minus a threshold energy of about 10 keV. At an impact energy of 100 keV, the number of carbon atoms emitted from the target is much larger for a ${\mathrm{CO}}_{2}$ cluster impact than for an Ar cluster impact with a factor of about 3.35. The reactive enhancement of the surface erosion in the ${\mathrm{CO}}_{2}$ case is also proven by a strong CO signal in the spectrum of the emitted fragments. On the other hand, the surface of the relaxed crater is more densely packed and smoother in the case of the Ar cluster impact.
Cost efficiency and economies of diversification of biogas-fuelled cogeneration plants in Austria: a nonparametric approach

This paper investigates the existence and the degree of economies of diversification for small-scaled, renewable-fuelled cogeneration systems using 2014 cross-sectional data from 67 Austrian biogas plants. In addition, cost efficiency of those biogas plants is estimated with a non-parametric linear programming technique, known as Data Envelopment Analysis. This is the first study applying the methodology proposed by Chavas and Kim (2010). Economies of diversification are decomposed into three additive parts: a part measuring complementarity among outputs; a part reflecting economies of scale; a part reflecting convexity. Furthermore, this paper extends the decomposition introduced by Chavas and Kim (2010) in such a way that the contribution of each input to economies of diversification and its components can be investigated. The results indicate substantial cost savings from diversification. For very-small scaled plants ( 250 kWel) positive complementarity and convexity effects are the main source of economies of diversification and outweigh the negative effect from scale diseconomies. In addition to substantial fuel/feedstock cost reductions, significant costs saving effects from the jointness in labour and other inputs positively contribute to the complementarity effect. While on average capital and labour costs positively contribute to economies of scale, feedstock costs work in the direction of diseconomies of scale.
How Useful Are Multimodal Texts in Motivating Vietnamese Primary School Children in Learning English Vocabulary ?

Motivating young learners in learning vocabulary is not easy, especially in the context that children learning English at weekends in language schools in Vietnam feel stressful and tired after schooldays at their primary schools. But if we fail to do that, we are unable to help them improve their language skills. As a result, this action research examined the roles of multimodal texts in motivating Vietnamese primary school children in learning English vocabulary. It was conducted in two classes at a language school where the researcher has been teaching English for five years and a conclusion was withdrawn that in spite of challenges facing the teachers multimodality engaged the primary school children, both boys and girls, at different ages in learning vocabulary.
POPULATION DYNAMICS OF SPIDERS IN SELECTED COTTON FIELDS OF VIRUDHUNAGAR DISTRICT, TAMIL NADU, INDIA S. Jeyaparvathi*, S. Baskaran and Ga. Bakavathiappan

The mean populations of spiders in three different places like Thayilpatti, Madathuppatti and Vembakkottai, Virudhunagar district, Tamil Nadu, India were studied. In these areas, twenty common species of spiders belonging to six families from these three selected areas were collected and identified. The collected spiders belonging to the family, Salticidae, Oxyopidae, Araneidae, Lycosidae, Gnaphosidae and Sparassidae. In this study, two species of spiders were observed, one is web weaver and another one is non - web weaver. The web weaving spiders belonging to the family Araneidae and Lycosidae. The non-web weaving spiders belonging to the family Salticidae, Oxyopidae, Gnaphosidae, Lycosidae and Sparassidae. P. viridana, O. birmanicus, O. hindostanicus, P. latikae and A. anasuja a dominant predator recorded in these three selected areas. The population dynamics of the individual spider species in different months showed that the population of spider species mainly P. vridana, O. birmanicus, O. hindostanicus, A. anasuja, N. lugubris, P. latikae, C. cicatrosa and L. pseudoannulata were very high throughout the study period. The increase in the spiders density suggested that the spider density is influenced by the increase in prey density.
Stochastic Forcing of Potential Vorticity: Observations

AbstractThe linear theory of point correlation maps for synoptic systems relies so far mainly on specifications of stochastic forcing due to nonlinear processes that are not based on observations. Forty-year ECMWF Re-Analysis (ERA-40) data are used to derive time series of the forcing terms in a potential vorticity equation for a correlation point in the North Atlantic storm-track region. It is found that the forcing correlations are restricted to distances less than 1500 km to the correlation point in zonal direction and just a few hundred kilometers in meridional direction. The forcing is not even approximately white in time. Covariances of forcing and potential vorticity are presented as well. An advection equation with simple damping and realistic stochastic forcing is solved to approximate the observed covariances of forcing and potential vorticity.
Relationship Leadership, Employee Engagement and Organizational Citizenship Behavior

Our research focuses on the impact of supportive leadership and employee engagement on the organizational citizenship behavior (OCB). The research study setting with the individual unit of analysis. A survey was conducted by using questionnaires from previous research. The questionnaires were sent to 300 employees in service organizations in Yogyakarta, Indonesia, 252 completed surveys data were returned anonymously in sealed envelopes. Validity and reliability tests were used to test the questionnaires contents. The structural equation modeling (SEM) was used to test the relationship among variables. The result proved that supportive leadership and employee engagement have direct positive relationship with OCB and employee engagement mediated the relationship between supportive leadership and OCB. A thorough discussion on the relationship among the variables as well as on self-rating is presented in this paper.
INFLUENCE OF TEMPERATURE AND OSMOTIC STRESS ON GERMINATION INDUCTION OF DIFFERENT CASTOR BEAN CULTIVARS

Among the different factors temperature and moisture are considered very important for germination, crop maturity and productivity. Experiments were conducted in the laboratory to determine the effect of temperature and moisture stress on the speed and total germination of four Castor bean cultivars (DS-30, PR-7/1, PR-101 and Local) obtained from two locations viz., Attock and Chakwal. The seeds were conditioned to different moisture content ranging from 0 to -14 bars and temperature ranging from 0 to 35°C in hot air chamber/oven. The highest value indicated the fastest germination that was obtained from Attock location (3.992), in comparison with value (3.933) obtained from Chakwal when the Castor bean cultivars were incubated at 25 o C. The maximum GRI was recorded at the osmotic pressure of 0 bar (control), whose value in case of Attock seed location was 3.857 and Chakwal seed location (4.788). The interaction effects of moisture, temperature and cultivars were found significant for GRI. The cultivars performed differently under different temperature and moisture conditions.
In vitro kinetic parameters of marandu palisadegrass associated with nonfiber carbohydrates

Objetivou-se avaliar efeitos de niveis (0, 10, 20 e 30%) de amido ou glicose associado ao capim Urochloa brizantha cv. Marandu sobre os parâmetros cineticos e digestao da fibra do por meio da tecnica in vitro de producao de gases. O experimento foi organizado em um delineamento inteiramente casualizado, com quatro tratamentos e 6 repeticoes para cada fonte energetica. O capim Marandu associado aos niveis de carboidratos nao fibrosos foi incubado em frascos de 120 mL, com tampao de McDougall e inoculo ruminal proveniente de dois ovinos canulados no rumen. Foram realizadas leituras da pressao dos gases no interior dos frascos, bem como dois frascos foram retirados nos tempos 24, 48 e 96 horas (h) para avaliacao da FDN residual. Utilizou-se modelo logistico com um compartimento para estimar os parâmetros cineticos para a forragem ou da forragem associada a amido, entretanto foi necessario utilizar o modelo bicompartimental quando da adicao de glicose. Cada 1% de amido adicionado promoveu aumento linear na producao total de gases em 0,2254 mL e reducao do periodo de latencia em 0,2451 h, mas nao afetou a taxa de digestao. Ja os niveis de glicose causaram efeito quadratico sobre a taxa de digestao e latencia, sendo estimado valor minimo da taxa de digestao de 0,01689 h-1 no nivel de glicose de 10,07% e latencia minima igual a zero. Os niveis de amido causaram reducao linear da digestao da FDN em 0,296% apenas no tempo 24 h, enquanto que os niveis de glicose reduziram linearmente a digestao da FDN em todos os tempos avaliados (0,3269; 0,4171 e 0,234%, nos tempos 24, 48 e 96 h, respectivamente). Os niveis de glicose promovem efeitos diferenciados sobre os parâmetros cineticos da producao de gas in vitro do capim Marandu comparado a suplementacao com amido, destacando seus efeitos negativos prolongados sobre a digestao da FDN.
The Implication of Large Class Size in the Teaching and Learning of Business Education in Tertiary Institution in Ekiti State

Large class size is one of the problems in the educational sector that developing nations have been grappling with. Nigeria as a developing nation is no exception. The purpose of this study is to provide views of both lecturers and students on large class size and how it affects teaching and learning in tertiary institutions in Ekiti State of Nigeria. The study employed survey design; the population consisted of all lecturers and students in College of Education in Ikere-Ekiti, Ekiti State, University of Nigeria, Nsukka, Ikere Campus and Ekiti State University, Ado Ekiti, Ekiti State. The total populations of thirty (30) lecturers were used for the sample, while five hundred and twenty (520) final year students were randomly selected. The research instruments used in data collection were questionnaire. The findings of this study revealed that large class size has negative implications on effective teaching and learning of Business Education in tertiary institutions. The relationship between large class and effective teaching and learning is very low. The authors recommended among others that management should employ more lecturers for the teaching of Business Education in tertiary institutions if they want to admit large number of students because of income, also the institution should make extra effort to provide more resources and facilities to promote effective teaching and learning of Business Education. Keywords : Class Size, Teaching and Learning
Motivational Duality in Online Consumer Behaviour: Website Usability and Flow State as Moderating Factors

The present study explores the influence of website usability (utilitarian motivation) and user flow state (hedonic motivation) on online purchasing behaviour in the context of a site promoting a tourist destination. A 2x2 (high vs. low website usability and high vs. low flow state) experimental design was chosen. The sample comprised 227 Spanish individuals. The results underline the importance of utilitarian aspects for the effectiveness of the purchasing process and the formation of perceived risk online. The findings also demonstrate the influence of hedonic aspects on attitudes and loyalty towards the tourist destination, and affirm that message involvement plays an important role in reducing perceived risk and augmenting attitudes and loyalty. It is recommended that websites should reflect the different types of motivation so as to make browsing both appealing and useful for the online consumer.
Switched Nonuniform and Piecewise Uniform Scalar Quantization of Laplacian Source

In this paper switched nonuniform and piecewise uniform scalar quantization of Laplacian source are analyzed. This scalar quantization techniques are used in order to obtain higher signal quality by increasing signal-to-quantization noise ratio (SNRQ) with respect to it’s necessary robustness over a broad range of input variances in a wide range of signal volumes. We observe μ-law compandor implementation to achieve compromise between high-rate digitalization and variance adaptation. The main contribution of this model is kipping almost the same quality as the nonuniform compandor model, with simpler realization structure and the possibility of it’s applying for digitalization of wide range continuous signals.
One Canvas, Two Audiences: How Faculty and Students use a Newly Adopted Learning Management System

James Madison University (JMU) adopted a new Learning Management System in the 2013-2014 academic year. In the 2014-2015 academic year, a small group of instructors and 2 instructional technologists conducted survey research to evaluate the faculty’s and student body’s experiences with the Canvas learning management system (LMS) roll-out. The results of the study indicated that while faculty and students were generally satisfied with Canvas, there are distinct differences in the way each group uses technology: faculty design their courses for delivery on laptops, but students use smartphones to access Canvas. Unfortunately, the interface, navigation, and features on Canvas for mobile devices are very limited. In addition, the course structure and learning modules cannot be viewed on smartphones. This creates a usability issue for the students, and presents a distinct challenge for instructors who are unaware that their students are not able to see or use the course, as they intended.
Crack Detection in Shafts Using Mechanical Impedance Measurements

In this study, experimental and analytical investigations are carried out on an overhanging cylindrical shaft carrying a propeller at the cantilever end, in order to identify the crack existence in shafts using the mechanical impedance approach. Also the experimental study uses the modal analysis software, LMS Test Lab TM , for measuring and analyzing the response results from un-cracked and cracked shafts. In the numerical study, both the un-cracked and the cracked shafts (with varying crack depths) are modeled by finite element procedure. 3-D iso-parametric elements (element types 186 and 187), available in the ANSYS FEM program, are utilized to model the system. The impedance and velocity frequency response functions are used to identify the crack depth in the shaft system. Impedance and mobility were measured and simulated in the vertical direction for the resonant frequencies and anti-resonant frequencies. The experimental results are used to validate the numerical results. A better crack detection procedure was obtained by the plot of the slope of the non-dimensional frequency ratio (in the resonant and anti-resonant regimes) vs. the non-dimensional crack depth ratio. By this method crack presence could be definite detected when the non-dimensional crack ratio is greater than 0.20 to 0.25. In addition monitoring of the lower torsional frequency indicated the crack presence even from the beginning stages.
Covalency, double-counting, and the metal-insulator phase diagram in transition metal oxides

Dynamical mean field theory calculations are used to show that for late transition metal oxides a critical variable for the Mott/charge-transfer transition is the number of d electrons, which is determined by charge transfer from oxygen ions. Insulating behavior is found only for a narrow range of d occupancy, irrespective of the size of the intra-d Coulomb repulsion. The result is useful in interpreting “density functional + U ” and “density functional plus dynamical mean field” methods in which additional correlations are applied to a specific set of orbitals and an important role is played by the “double counting correction” which dictates the occupancy of these correlated orbitals. General considerations are presented and are illustrated by calculations for two representative transition metal oxide systems: layered perovskite Cu-based high-Tc materials, an orbitally nondegenerate electronically quasi-two-dimensional system, and pseudocubic rare earch nickelates, an orbitally degenerate electronically three-dimensional system. Density functional calculations yield d occupancies very far from the Mott metal-insulator phase boundary in the nickelate materials, but closer to it in the cuprates, indicating the sensitivity of theoretical models of the cuprates to the choice of double counting correction, and corroborating the critical role of lattice distortions in attaining the experimentally observed insulating phase in the nickelates.
A simple dynamical model for gravity drainage of brine from growing sea ice

Gravity drainage of brine through liquid brine channels is the dominant mechanism for the desalination of growing sea ice. We describe and determine mathematically the essential physics of this process, elucidating the connection between downward flow in brine channels and a convective upward flow in the rest of the porous ice, which we show has a vertically linear structure and strength proportional to a Rayleigh number. Our simple dynamical model of this process is used to interpret the exponential propagation of dye fronts in laboratory experiments. We propose that using our new, derived parameterization for gravity drainage in sea ice in terms of two unknown parameters could lead to computationally feasible improvements to thermodynamic sea‐ice models.