Miracle-dz/UniFAR-FTUs huggingface dataset:
Understanding mobile game success : a study of features related to acquisition , retention and monetization

As mobile game distribution costs gets near zero, the number of available games on app stores, which is already enormous, continues to grow. It gets increasingly difficult for game developers to build a mobile game and achieve the top positions on charts. With it in mind, this paper’s main purpose is to investigate the relationship between game features and the performance achieved by mobile games in terms of number of downloads and gross revenue. A total of 37 game features were analyzed in order to study how each of them influence mobile games’ performance on app stores. The performance of mobile games is measured based on their current position in download and revenue charts on Google Play store. A linear regression model that maps game features and charts performance is trained using a M5 prime classifier and data from 64 mobile games. Results show how each game feature influences the download and revenue performance of successful mobile games. Keywords—mobile games, app stores, top charts, game design, game features, data mining
Hierarchical linear modeling against the "Gold Standard" of visual analysis in single-subject design

Visual analysis is the “Gold Standard” for single-subject data because of two assumptions: a low Type I error rate and consistency across raters. However, research has shown it less reliable and accurate than desired. Autocorrelation, variability, trend, lack of obvious mean shift, and differences in the physical presentation of graphs contribute to inconsistencies and higher error rates. Statistical analysis has been advocated as a judgmental aid to visual analysis, but an appropriate statistic has not been found. In the present study, the accuracy of Hierarchical Linear Modeling was compared to raters’ visual analysis of previously published data using Receiver Operating Characteristic curves. The statistic was established as a potentially useful judgmental aid; however, definite conclusions were hindered by low power.
Consumers’ preferences for animal-source foods and retail outlets: The case of Tanzania

Growth in population and income, as well as urbanisation, are contributing to the growing consumption of high-value foods in developing countries. However, public and private investments targeting high-value agricultural markets are constrained by limited information on the quality dimensions of the market, the nature of traditional retail formats, and consumer segmentation. This paper presents a simple and appropriate methodology to provide such information, and applies it in Tanzania to animal-sourced foods. It features a rapid survey, which is then aligned with nationally representative survey data. The results show that Tanzanian consumers demand, and are anticipated to continue demanding, relatively good-quality animal products but in rather low-valued product forms. Consumer segments are differentiated by level of wealth and by choice of retail format and retail product form, rather than by quality per se.
The Underperformance of IPOs: the Sensitivity of the Choice of Empirical Method

This paper investigates the performance of Jordanian initial public offerings (IPOs) using data from Amman Stock Exchange (ASE) over the period 19812002. We studied the sensitivity of the model used to estimate the cumulative average abnormal returns. In doing that, we employed three different models and used two approaches to test the result: Standard event-time analysis and the calendar-time approach. The three models used to estimate the cumulative average abnormal returns produce significant negative abnormal returns when we employ event-time analysis. However, the calendar-time approach concludes that the long-term performance of Jordanian IPOs is not different than that of the overall market.
Predicting occurrence of wolf territories in Scandinavia

We used logistic regression to compare a set of habitat features inside known Scandinavian wolf Canis lupus territories with the same habitat features in areas outside known territories, but still close enough to be available for wolf colonization. In addition, we analysed changes in habitat variables over time within wolf territories. Wolf territories had lower densities of roads, built-up areas and open land than areas outside wolf territories, but there was no difference in the density of the wolves' main prey, elk Alces alces. The logistic regression model classified 79% of Scandinavia outside the reindeer husbandry area as suitable wolf habitat, that is with a probability of wolf occurrence >0.5. The proportion of built-up areas within the wolf territory decreased as the ‘borders’ of the wolf territory changed over time. Our model had a reasonably high predictive power, with correct classification in 90% (18 of 20) of the observed wolf territories in the study area. Polygons, randomly distributed outside the observed wolf territories, were correctly classified as not being occupied by wolves in 85% of the cases (17 of 20). This allows a more effective use of resources to, for example, prevent wolf depredation on livestock and dogs.
Why Grandes Ecoles are so valued

This contribution was aimed at examining if the privileged position of Grandes Ecoles on the French labour market could be linked to training and, in particular, knowledge acquired in these courses. The REFLEX survey data allows to test this hypothesis for a sample of French graduates from Grandes Ecoles and University master programmes. Our results show that actually some useful skills on the labour market are more easily acquired in Grandes Ecoles. This is the case in particular of 'analytical thinking' or 'ability to command a foreign language', domains on which Grandes Ecoles have heavily focused their curriculum in the 1990s. We show however that the competencies acquisition process is not unique and that professional or extra-school experiences during studies can have positive effects on the attainment of skills.
Influence of SOC on the Mental Health Status of Postgraduate Trainee Dentists in Japan

Purpose: The aim of this research is to examine whether dental trainees’ stress-coping ability and health-maintenance capability affect their mental health during training. Methods: Trainee dentists who began their postgraduate clinical training for one year in 2010 (n = 60) and 2011 (n = 64) at Kyushu University Hospital were eligible to participate in the study. The questionnaire survey was conducted five times throughout the training year using the 13-item Sense of Coherence (SOC-13), the 28-item General Health Questionnaire (GHQ-28), and the 22-item Job Content Questionnaire (JCQ-22). Results: A 107 trainee dentists were completed (female n = 48, male n = 59). We identified the influence of SOC on the mental health status of postgraduate trainee dentists; that is, trainee dentists with high SOC showed favorable mental health, whereas those with low SOC showed poor mental health during the training. Concerning work conditions, trainee dentists with high SOC had adequate support from their supervisors and coworkers. Conclusion: This study showed the possibility of applying SOC for predicting the mental health status of trainee dentists. The results also suggest the need to introduce a solid support system from the early stages of training, in order to achieve the effects of mental health support for trainee dentists with low SOC.
The bordism version of the h-principle

In view of the Segal construction each category with a coherent operation gives rise to a cohomology theory. Similarly each open stable differential relation $R$ imposed on smooth maps of manifolds determines cohomology theories $k^*$ and $h^*$; the cohomology theory $k^*$ describes invariants of solutions of $R$, while $h^*$ describes invariants of so-called stable formal solutions of $R$. We prove the bordism version of the h-principle: The cohomology theories $k^*$ and $h^*$ are equivalent for a fairly arbitrary open stable differential relation $R$. Furthermore, we determine the homotopy type of $h^*$. Thus, we show that for a fairly arbitrary open stable differential relation $R$, the machinery of stable homotopy theory can be applied to perform explicit computations and determine invariants of solutions. In the case of the differential relation whose solutions are all maps, our construction amounts to the Pontrjagin-Thom construction. In the case of the covering differential relation our result is equivalent to the Barratt-Priddy-Quillen theorem asserting that the direct limit of classifying spaces $B\Sigma_n$ of permutation groups $\Sigma_n$ of finite sets of n elements is homology equivalent to each path component of the infinite loop space $\Omega^{\infty}S^{\infty}$. In the case of the submersion differential relation imposed on maps of dimension $d=2$ the cohomology theories $k^*$ and $h^*$ are not equivalent. Nevertheless, our methods still apply and can be used to recover the Madsen-Weiss theorem (the Mumford Conjecture).
SKIN LESIONS DUE TO MUSTARD GAS

The paper aims at undertaking a Bayesian evaluation of surrogate endpoints which has the potential to decrease the exposure of patients while at the same time being cost-effective. As such, the current research, with an individual-level evaluation, intends to introduce a new Bayesian criterion based on some of the previous research works. Taking into account the surrogate and the true endpoint variables, the statistics that derived for the exponential family of distributions particularly is for a binomial one. In due process, the paper shows the relationship between the Bayesian likelihood reduction factor (LRFB) and its frequentist counterpart (LRF). Finally, to show some intuition in the nature of LRFB, it has been applied in a multi-center simulation and a uni-center real example. In real data, LRFB is carried out to evaluate the immunological factor IL-18 BPa Serum in the long-term effect of skin lesions of people who were exposed to mustard gas.
ICOPER Deliverable D-2.3 - ISURE: Report on implementation and validation of a standardized model for learning needs analysis and the provision of learning opportunities

Najjar, J., Grant, S. , Simon, B. , & Klobucar, T. (2010). ICOPER Deliverable D-2.3 - ISURE: Report on implementation and validation of a standardized model for learning needs analysis and the provision of learning opportunities. Vienna: WU Vienna; ICOPER. [contributors: Franz Muller, Michael Totschnig, Evaldas Karazinas, Israel Gutierrez, Mikael Karlsson, Henning Eriksson, Martin Sillaots, Jacek Bubak, Elisabetta Parodi, Roland Klemke, Daniel Muller, Anh Vu Nguyen-Ngoc]
Pharmacokinetics and Bronchopulmonary Disposition of PI3KDelta Inhibitor IC87114 after Intratracheal Administration in a Severe Asthma Model

Type 2 helper T cell-predominant asthma is a refractory type of asthma that has motivated biomedical industries to develop novel drugs. The phosphoinositide 3-kinase pathway has been implicated in asthma and chronic obstructive pulmonary disease. IC87114 (2-[(6-aminopurin-9-yl) methyl]-5-methyl-3-[2-methylphenyl]quinazolin-4-one) was recently developed as a PI3Kδ inhibitor. In a neutrophil type 2 helper T cell dominant asthma model, pharmacokinetic analysis of IC87114 was performed. Following intratracheal administration of 1 mg/kg IC87114 to ovalbumin/lipopolysaccharide-sensitized/challenged mice, airway hyper-responsiveness and structural analysis was performed and the plasma concentration time course and bronchoalveolar lavage fluid concentration of IC87114 were described using a compartment model with a first-order elimination rate constant. Plasma had a three-fold higher Cmax compared to bronchoalveolar lavage fluid. The half-life of IC87114 in plasma and bronchoalveolar lavage fluid was 2.37 and 10.25 h, respectively. Enhanced airway hyper-responsiveness and increased peribroncholar and perivascular inflammatory cell infiltrates in the lungs were significantly reduced in the IC87114-administered group compared with the ovalbumin/lipopolysaccharide-exposed group. Modeling approaches sufficiently explained the relationship between systemic circulation and bronchoalveolar lavage fluid concentration of IC87114 with Kbronchoalveolar lavage/plasma (approximately 0.38 h-1) in ovalbumin/lipopolysaccharide-sensitized/challenged mice. Our results will be useful for understanding the relationship between the pharmacokinetics and pharmacodynamics of IC87114.
The Effect of Kurtosis on the Cross-Section of Stock Returns

In this study, I show an effect of the statistical fourth moment on stock returns. In the mean–variance framework, rational investors follow two strategies: optimize the mean–variance of return and diversify the portfolio. Regarding the first approach, investors intend to generate the maximum level of return while facing a constant level of risk (or, the standard deviation) of return. It is possible that firm specific risk can be concentrated in the portfolio. However, diversification of the assets can eliminate that (idiosyncratic) risk from the portfolio. After a long period of time, in a diversified portfolio the shape of the return distribution appears to be peaked around the average value of the return compared with that of the typical shape of the return distribution. If investors have a preference for skewness in their returns, they also can produce peakedness in the shape of the distribution. The statistical fourth moment (kurtosis) measures the magnitude of peakedness of the distribution. As the kurtosis of the distribution increases the distribution will appear more peaked. I find evidence that kurtosis positively and significantly predicts future stock returns over the period 1981–2011. The effect remains after controlling for other factors in multivariate regressions. Introduction A number of studies state that investors who are undiversified commonly hold a few numbers of assets that result in failure to eliminate idiosyncratic risk (see Kelly, 1995; and Goetzmannand and Kumar, 2004). Under standard portfolio theory, those investors capture the same amount of expected returns as those who have a large number of assets. The former type of investors face higher risk than the latter type of investors. Mitton and Vorkink (2007) mention that if investors show under–diversification in their portfolios, they are likely to earn extreme positive returns while experiencing a high value of skewness. Conine and Tamarkin (1981) provide a similar argument in a different way–investors try to avoid diversification in their portfolios when investors realize they are earning extremely large returns. Therefore, in the mean–variance–skewness framework, investors with a preference for skewness may obtain an efficient portfolio. However, in the mean–variance–skewness framework, stocks that provide extremely large returns ultimately result in portfolio returns that are positively skewed (i.e. skewed to the right). A very low probability is associated with the extreme return above the mean for a positively skewed distribution.
Nonperturbative O(a) improvement of Wilson quark action in three-flavor QCD with plaquette gauge action

We perform a non-perturbative determination of the O(a)-improvement coefficient c_SW for the Wilson quark action in three-flavor QCD with the plaquette gauge action. Numerical simulations are carried out in a range of \beta=12.0-5.2 on a single lattice size of 8^3x16 employing the Schr\"odinger functional setup of lattice QCD. As our main result, we obtain an interpolation formula for c_SW and the critical hopping parameter K_c as a function of the bare coupling. This enables us to remove O(a) scaling violation from physical observables in future numerical simulation in the wide range of \beta. Our analysis with a perturbatively modified improvement condition for c_SW suggests that finite volume effects in c_SW are not large on the 8^3x16 lattice. We investigate N_f dependence of c_SW by additional simulations for N_f=4, 2 and 0 at \beta=9.6. As a preparatory step for this study, we also determine c_SW in two-flavor QCD at \beta=5.2. At this \beta, several groups carried out large-scale calculations of the hadron spectrum, while no systematic determination of c_SW has been performed.
A Novel Single Feed Omnidirectional Circularly Polarized Antenna with Wide AR Bandwidth

A novel omnidirectional circularly polarized (CP) antenna with single feed is proposed for 2.4GHz WLAN applications. Based on the zeroth-order resonance (ZOR) mode of epsilon negative (ENG) transmission line (TL), the antenna excites uniform vertically polarized E-fleld just as the monopole does. A modifled Alford loop with electromagnetic coupling fed by L-shaped strip consists of four curved branches, which is placed on the top of the antenna and generates an equivalent horizontally polarized magnetic dipole mode. Once the two orthogonally polarized components are equal in amplitude but difierent in phase by 90 - , omnidirectional CP wave can be obtained. The measured results show that the impedance bandwidth (S11 < i10dB) is 6% (2.38{2.53GHz), and the 3-dB axial ratio bandwidth in the azimuth plane is very wide which achieves 54% (1.60{2.80GHz). Additionally, the 3-dB axial ratio beamwidth is over 50 - for radiation pattern in elevation plane. Moreover, the antenna achieves excellent omnidirectional right-hand CP performance with a variation of 0.5dB in the azimuth plane and an average gain over 1.5dB across the operating band, which are well applied to the wireless system.
One-pot synthesis of an inorganic heterostructure: uniform occlusion of magnetite nanoparticles within calcite single crystals

A facile one-pot method is described for the formation of novel heterostructures in which inorganic nanoparticles are homogeneously distributed throughout an inorganic single crystal matrix. Our strategy uses nanoparticles functionalised with a poly(sodium 4-styrenesulphonate)-poly(methacrylic acid) [PNaStS-PMAA] diblock copolymer as a soluble crystal growth additive. This copolymer plays a number of essential roles. The PMAA anchor block is physically adsorbed onto the inorganic nanoparticles, while the PNaStS block acts as an electrosteric stabiliser and ensures that the nanoparticles retain their colloidal stability in the crystal growth solution. In addition, this strong acid block promotes binding to both the nanoparticles and the host crystal, which controls nanoparticle incorporation within the host crystal lattice. We show that this approach can be used to achieve encapsulation loadings of at least 12 wt% copolymer-coated magnetite particles within calcite single crystals. Transmission electron microscopy shows that these nanoparticles are uniformly distributed throughout the calcite, and that the crystal lattice retains its continuity around the embedded magnetite particles. Characterisation of these calcite/magnetite nanocomposites confirmed their magnetic properties. This new experimental approach is expected to be quite general, such that a small family of block copolymers could be used to drive the incorporation of a wide range of pre-prepared nanoparticles into host crystals, giving intimate mixing of phases with contrasting properties, while limiting nanoparticle aggregation and migration.
Decomposition of Solutions in Front of the Interface Induced by Directional Crystallization

Here we show the results of experimental observation of decomposition of the solution components into the neighboring cells. The liquid solution under crystallization first gets into the unstable state and then decomposes. The decomposition result is fixed in the solid phase as inhomogeneous component distribution. Our experimental results enable to argue that the eutectic pattern forms due to interface instability and spinodal decomposition of non-equilibrium solution forming in front of the interface.
Nonlinear Control of Interior PMSM Using Control Lyapunov Functions

In this paper, we introduce a non-linear torque control for an interior permanent-magnet synchronous motor (IPMSM). The nonlinear control is based on a Control Lyapunov Function (CLF) technique. The proposed stabilizing feedback law for the IPMSM drive is a damping control method and is shown to be globally asymptotically stable. The CLF method takes the system nonlinearities into account in the control system design stage. Such nonlinearities are due to the cross coupling between the q and the q currents in addition to the system parameters like the inductances and the flux linkages. The complete IPMSM drive incorporating the proposed CLF has been successfully simulated in a plant model for both motor and inverter. The performance of the proposed drive is investigated in simulation at different operating conditions. It is found that the proposed control technique provides a good torque control performance for the IPMSM drive ensuring the global stability. In later work, we are planning to investigate other phenomena such as magnetic saturation, nonlinear loads, mechanical friction and flexibilities.
Changes of Band I Center and Band II/Band I Area Ratio in Reflectance Spectra of Olivine-Pyroxene Mixtures Due to the Space Weathering and Grain Size Effects

Introduction: In the visible and near-infrared wavelength region, reflectance spectrum of olivine and orthopyroxene (opx), which are two of the most common rock-forming minerals, exhibit some characteristic absorption features especially fit for remote sensing. Opx has two absorption bands around 0.9 μm and 2 μm, whereas olivine shows a complex absorption band around 1 μm and no band around 2 μm. Each of the absorption bands of opx consists of a single absorption, and the 1 μm band of olivine is a composite of three [e.g., 1]. The 1 μm band is generally referred to as the “Band I” and the 2 μm band as the “Band II”. One of the methods for estimating the olivine/opx modal abundances from their reflectance spectra is a plot of the Band I center versus Band II/Band I (BII/BI) area ratio [2, 3]. Cloutis et al. [2] estimated the modal abundance from the reflectance spectra of laboratory olivine-opx mixtures using various methods. Gaffey et al. [3] used the Band I center vs. BII/BI area ratio plot and explained the relationship between the S-type asteroids and ordinary chondrites (OCs). Presented here is the possibility that the space weathering and grain size effects have significant influence on the Band I center vs. the BII/BI area ratio plot.
Live coding in laptop performance

Seeking new forms of expression in computer music, a small number of laptop composers are braving the challenges of coding music on the fly. Not content to submit meekly to the rigid interfaces of performance software like Ableton Live or Reason, they work with programming languages, building their own custom software, tweaking or writing the programs themselves as they perform. Often this activity takes place within some established language for computer music like SuperCollider, but there is no reason to stop errant minds pursuing their innovations in general scripting languages like Perl. This paper presents an introduction to the field of live coding, of real-time scripting during laptop music performance, and the improvisatory power and risks involved. We look at two test cases, the command-line music of slub utilising, amongst a grab-bag of technologies, Perl and REALbasic, and Julian Rohrhuber's Just In Time library for SuperCollider. We try to give a flavour of an exciting but hazardous world at the forefront of live laptop performance.