Miracle-dz/UniFAR-FTUs huggingface dataset:
K2 observations of the sdBV + dM/bd binaries PHL 457 and EQ Psc

We present an analysis of two pulsating subdwarf B stars PHL 457 and EQ Psc observed during the K2 mission. The K2 light curves of both stars show variation consistent with irradiation of a cooler companion by the hot subdwarf. They also show higher frequency oscillations consistent with pulsation. Using new spectroscopic data, we measured the radial velocity, effective temperature, surface gravity, and helium abundance of both hot subdwarfs as a function of orbital phase. We confirm the previously published spectroscopic orbit of PHL 457, and present the first spectroscopic orbit of EQ Psc. The orbital periods are 0.313 and 0.801 d, respectively. For EQ Psc, we find a strong correlation between Teff and orbital phase, due to contribution of light from the irradiated companion. We calculated amplitude spectra, identified significant pulsation frequencies, and searched for multiplets and asymptotic period spacings. By means of multiplets and period spacing, we identified the degrees of several pulsation modes in each star. The g-mode multiplets indicate subsynchronous core rotation with periods of 4.6 d (PHL 457) and 9.4 d (EQ Psc). We made spectral energy disctribution (SED) fits of PHL 457 and EQ Psc using available broad-band photometry and Gaia data. While the SED of PHL 457 shows no evidence of a cool companion, the SED for EQ Psc clearly shows an infrared (IR) access consistent with a secondary with a temperature of about 6800 K and a radius of 0.23 R⊙. This is the first detection of an IR access in any sdB + dM binary.
Contamination of Sachet Water in Nigeria: Assessment and Health Impact

Adequate supply of fresh and clean drinking water is a basic need for all human beings. Water consumers are frequently unaware of the potential health risks associated with exposure to water borne contaminants which have often led to diseases like diarrhoea, cholera, dysentery, typhoid fever, legionnaire’s disease and parasitic diseases. The inadequacy of pipe borne water-supply in Nigeria is a growing problem; as a result people resort to buying water from vendors, and sachet or bottled water became a major source of drinking water. Although, portable and affordable, the problems of its purity and other health concerns have begun to manifest. Sachet water have been reported to contain bacteria such as Bacillus sp. , Pseudomonas sp. , Klebsiella sp. , Streptococcus sp. , and oocysts of Cryptosporidia sp. Apart from environmental contaminants, improper storage and handling by vendors also poses a serious threat to the health of the ignorant consumers. This paper tends to review the quality of these ‘pure water’; its physical examination, microbial assessments, its impacts on health, and the various strategies adopted by the concerned authorities to regulate this thriving industry.
Harnessing the power of social media in predictive analytics

This paper seeks to assess the added value of a Facebook user’s friends data in event attendance prediction over and above user data. For this purpose we gathered data of users that have liked an anonymous European soccer team on Facebook. In addition we obtained data from all their friends. In order to assess the added value of friends data we have built two models for five different algorithms (logistic regression, random forest, adaboost, neural networks and naive Bayes). The baseline model contained only user data and the augmented model contained both user and friends data. We employed five times two-fold cross-validation and the Wilcoxon signed rank test to validate our findings. The results suggest that the inclusion of friends data in our predictive model increases the area under the receiver operating characteristic curve (AUC). Out of five algorithms, the increase is significant for three algorithms, marginally significant for one algorithm, and not significant for one algorithm. The increase in AUC ranged from 0.21%-points to 0.82%-points. The analyses show that a top predictor is the number of friends that are attending the focal event. To the best of our knowledge this is the first study Based on: Bogaert, M. , Ballings, M. , & Van den Poel, D. (2016). The added value of facebook friends data in event attendance prediction. Decision Support Systems, 82, 26 —34.
IMPLEMENTASI TECHNOLOGY ACCEPTANCE MODEL UNTUK MENGUKUR PENERIMAAN GURU TERHADAP INOVASI PEMBELAJARAN (Studi Kasus Model Pembelajaran CBR Di SMK)

Penelelitian bertujuan untuk mengetahui tingkat penerimaan guru terhadap pembejaran model CBR. Metode penelitian yang digunakan adalah metode survey. Seubjek penelitian ini adalah 8 orang guru dari 7 SMK dengan program keahlian TKJ. Hasil penelitia menunjukan baik ditinjau dari faktor internal maupun faktor eksternal, penerimaan guru terhadap model pembejaran CBR positif dan signifikan, dengan rerata nilai koofisien korelasi sebesar 78,98%.
Optimum Design of Cable-Stayed Bridges

Owing to their excellent structural characteristics, aesthetic appearance, low maintenance cost, and efficient use of structural materials, cable-stayed bridges have gained much popularity in recent decades. Stay cables of a cable stayed bridge are post-tensioned to counteract the effect of the bridge dead load. The solution for an optimum distribution of post-tensioning cable forces is considered one of the most important and difficult tasks in the design of cable-stayed bridges. A novel approach that utilizes the finite element method, B-spline curves, and real coded genetic algorithm to determine the global optimum post-tensioning cable forces is developed. The effect of geometric nonlinearity on the determination of the post-tensioning cable forces is assessed. The study is further extended to develop the first surrogate polynomial functions that can be used to evaluate the post-tensioning cable forces in semi-fan cable stayed bridges. The developed posttensioning functions are then used to investigate the optimal geometric configurations, which lead to the most uniform distribution of the post-tensioning cable forces. Details of an optimization code developed in-house specifically to optimize the design of composite cable-stayed bridges with semi-fan cable arrangement are then reported. The optimization design code integrates a finite element model, the real coded genetic algorithm, the posttensioning polynomial functions, and the design provisions provided by the Canadian Highway Bridge Design Code. An extensive parametric study is then conducted using this optimization code to develop a database for the optimum design of semi-fan cablestayed bridges. The database covers bridge lengths ranging from 250 m to 700 m. It describes the variations of the optimum design parameters, such as the main span length,
The ideal structure of graph algebras

For an nxn {0, 1}-matrix A= [A(i,j)] without zero rows or columns the corresponding Cuntz-Krieger algebra OA is defined in [4] as a C*algebra generated by partial isometries { Si I i = 1, . , n} on a Hilbert space satisfying sisi = L. =l A(i,j)sjsj. Almost from the start it was observed [25] that instead of a matrix we can use a directed graph to encode this data. It took a little bit longer though before it was realized that graphical approach may be equally successfully applied to infinite graphs. This extension ( cf. [16, 15, 6, 2, 19] and references there) allows us to study by similar tools and within the same framework objects as diverse as classical Cuntz-Krieger algebras On, 0 00 , AF-algebras, and many other C* -algebras. A variety of methods have been employed in the investigations of graph algebras. The arguments in [16] and several subsequent papers ( eg see [17]) rely heavily on the machinery of groupoids. A different approach is based on the realization of graph algebras as Cuntz-Pimsner algebras ( cf. [18, 13, 7]) corresponding to suitable Hilbert bimodules over discrete abelian C* -algebras. However it may well be that the direct approach yields the sharpest results (cf. [2, 19]). The structure of graph algebras is fairly well-known by now. Indeed, after several earlier partial results a criterion for their simplicity has been found [21] (see also [17]). Their K-theory is readily computable [19, 23]. Their stable rank can be determined from the graph [5]. A number of other questions, like injectivity of their homomorphisms ( cf. [24]) or direct sum decomposability ( cf. [8]) can now be easily answered. Modelling with graph algebras has been employed in the studies of semiprojectivity (cf. [22, 20]) and pure-infiniteness (cf. [10]). We begin this article with a brief overview of basic facts about graph algebras, illustrated with a number of examples. Then we move to our
Search for the production of 
W±W±W∓
 events at 
s=13  TeV

A search for the production of events containing three W bosons predicted by the standard model is reported. The search is based on a data sample of proton-proton collisions at a center-of-mass energy of 13 TeV recorded by the CMS experiment at the CERN LHC and corresponding to a total integrated luminosity of 35.9 fb^(−1(. The search is performed in final states with three leptons (electrons or muons), or with two same-charge leptons plus two jets. The observed (expected) significance of the signal for W^±W^±W^∓ production is 0.60 (1.78) standard deviations, and the ratio of the measured signal yield to that expected from the standard model is 0.34^(+0.62)_(−0.34). Limits are placed on three anomalous quartic gauge couplings and on the production of massive axionlike particles.
MISKONSEPSI SISWA PADA PEMBELAJARAN IPA SERTA REMEDIASINYA

Abstrak Artikel ini sebagai literature review bertujuan untuk mengetahui berbagai penyebab miskonsepsi yang dialami oleh siswa pada pembelajaran IPA beserta remediasinya. Dalam pembelajaran IPA, kemampuan memahami konsep merupakan salah satu indikator penting. Namun pada kenyataannya salah satu permasalahan yang ditemukan adalah masih banyak siswa yang mengalami miskonsepsi, hal tersebut disinyalir dapat berdapak pada rendahnya hasil belajar siswa khususnya pada pembelajaran IPA. Miskonsepsi merujuk pada suatu konsep yang tidak sesuai dengan pengertian ilmiah yang diterima oleh para ahli. Ada begitu banyak hal yang menjadi faktor penyebab terjadinya miskosepsi yang dialami oleh siswa diantanya adalah prakonsepsi yang dimiliki oleh siswa itu sendiri, guru, pembelajaran yang dilakukan oleh guru, atau bahkan bahan ajar yang digunakan. Permasalahan miskonsepsi ini tidaklah mudah untuk diselesaikan. Berdasarkan kondisi tersebut sangat penting untuk dilakukan remediasi. Oleh karena itu, pada proses pembelajaran di sekolah, sangat dianjurkan pada guru untuk menggunakan model atau metode pembelajaran yang lebih menantang dan mengajak siswa untuk mengkonstruksi pengetahuan baru melalui pengalaman belajar yang tepat. Kata Kunci : Miskonsepsi, Remediasi Miskosepsi, Pembelajaran IPA
Design of vision-based indoor positioning based on embedded system

Indoor positioning techniques have become very important in recent years. Due to the wide deployment of surveillance cameras, it has become feasible to use the videos for indoor positioning. The success of using this approach can also reduce the load of security persons of watching the monitors all the time. In this study, the authors propose a vision-based indoor positioning system. The proposed method uses a frame processing technique and applies the Gaussian mixture learning for video background model. The foreground object can be extracted by using the background subtraction. Based on the foreground object, the objects can be tracked and used in the direct linear transform, and generate a bird's-eye map with camera information. A real-time demonstration has been also provided. It shows the tracing of the moving objects and the bird's-eye view.
Biased-Belief Equilibrium

We investigate how distorted, yet structured, beliefs can persist in strategic situations. Specifically, we study two-player games in which each player is endowed with a biased-belief function that represents the discrepancy between a player’s beliefs about the opponent’s strategy and the actual strategy. Our equilibrium condition requires that (i) each player choose a best-response strategy to his distorted belief about the opponent’s strategy, and (ii) the distortion functions form best responses to one another. We obtain sharp predictions and novel insights into the set of stable outcomes and their supporting stable biases in various classes of games. (JEL C73, D83)
Classifier-Constrained Deep Adversarial Domain Adaptation for Cross-Domain Semisupervised Classification in Remote Sensing Images

This letter presents a classifier-constrained deep adversarial domain adaptation (CDADA) method for cross-domain semisupervised classification in remote sensing (RS) images. A deep convolutional neural network (DCNN) is used to build feature representations to describe the semantic content of scenes before the adaptation process. Then, adversarial domain adaptation is used to align the feature distribution of the source and the target. Specifically, two different land-cover classifiers are used as a discriminator to consider land-cover decision boundaries between classes and increase their distance to separate them from the original land-cover class boundaries. The generator then creates robust transferable features far from the original land-cover class boundaries under the classifier constraint. The experimental results of six scenarios built from three benchmark RS scene data sets (AID, Merced, and RSI-CB data sets) are reported and discussed.
Near-Field to Far-Field Transformation on Arbitrary Surfaces via Multi-Level Spherical Wave Expansion

This article presents a general technique for the far-field transformation of near fields measured over arbitrary surfaces and multimode probe correction in an efficient and accurate way. The use of not only one but several spherical wave expansions to model the antenna under test fields allows to incorporate full probe correction for arbitrary orientations with low computation cost. Combining this approach with a hierarchical subdomain decomposition strategy, the transformation problem is solved with a low computational complexity. In this method, the fields produced by neighbor subdomains are gradually aggregated and interpolated following a multilevel scheme, leading to a good scalability with frequency compared with other matrix-based transformation methods. The numerical and experimental results are provided to show the efficiency and capabilities of the proposed algorithm.
Electron and hole transport in disordered monolayer 
MoS2
: Atomic vacancy induced short-range and Coulomb disorder scattering

Atomic disorder is a common limiting factor for the low-temperature mobility in monolayer transition-metal dichalcogenides (TMDs; MX2). Here, we study the effect of often occurring atomic vacancies on carrier scattering and transport in p- and n-type monolayer MoS2. Due to charge trapping in vacancy-induced in-gap states, both neutral and charged vacancies resembling, respectively, short-range and combined short-range and long-range Coulomb scatterers, must be considered. Using the T-matrix formalism, we demonstrate a strong renormalization of the Born description of short-range scattering, manifested in a pronounced reduction and a characteristic energy dependence of the scattering rate. As a consequence, carrier scattering in TMDs with charged vacancies is dominated by the long-range Coulomb-disorder scattering, giving rise to a strong screening-induced temperature and density dependence of the low-temperature carrier mobility. For TMDs with neutral vacancies, the absence of intrinsic Coulomb disorder results in significantly higher mobilities as well as an unusual density dependence of the mobility which decreases with the carrier density. Our work illuminates the transport-limiting effects of atomic-vacancy scattering relevant for high-mobility TMD devices.
Graft fixation in ACL reconstruction

9 INTRODUCTION 11 REVIEW OF THE LITERATURE 13 1. Knee joint motion and stability 13 2. Anatomy and function of the ACL 14 3. ACL reconstruction 16 3.1. Operative technique 16 3.2. Graft selection 16 3.3. Graft placement 20 3.4. Graft preconditioning and tension 21 3.5. Graft healing 22 4. ACL graft fixation 23 4.1. Tibial and femoral fixations 24 4.2. Ideal graft fixation 24 5. Biomechanics of ACL graft and fixation 26 5.1. Material properties of the graft 26
Fundamental properties of Kepler and CoRoT targets – IV. Masses and radii from frequencies of minimum Δν and their implications

Recently, by analysing the oscillation frequencies of 90 stars, Yıldız, Çelik Orhan & Kayhan have shown that the reference frequencies (νmin0, νmin1, and νmin2) derived from glitches due to He ii ionization zone have very strong diagnostic potential for the determination of their effective temperatures. In this study, we continue to analyse the same stars and compute their mass, radius, and age from different scaling relations including relations based on νmin0, νmin1, and νmin2. For most of the stars, the masses computed using νmin0 and νmin1 are very close to each other. For 38 stars, the difference between these masses is less than 0.024 M$\odot$. The radii of these stars from νmin0 and νmin1 are even closer, with differences of less than 0.007 R$\odot$. These stars may be the most well known solar-like oscillating stars and deserve to be studied in detail. The asteroseismic expressions we derive for mass and radius show slight dependence on metallicity. We therefore develop a new method for computing initial metallicity from this surface metallicity by taking into account the effect of microscopic diffusion. The time dependence of initial metallicity shows some very interesting features that may be important for our understanding of chemical enrichment of Galactic Disc. According to our findings, every epoch of the disc has its own lowest and highest values for metallicity. It seems that rotational velocity is inversely proportional to 1/2 power of age as given by the Skumanich relation.
Modelling and simulations of a viscous model for cell migration

This thesis presents a mathematical model for cell migration that couples a system of reaction-advection-diffusion equations describing the interations between F-actin and myosin II toa force balance equation describing the velocity vector of the actin-myosin network. Cell migration plays a crucial role in many biological processes. In eukaryotic cells, this migration is largely powered by a system of actin and myosin II. At the leading edge of the cell, cross-inked actin filaments polymerise by adding actin monomers to their ends while at the back of the cell, myosin II binds to a bundle of actin filaments. These processes create protrusive and contractile forces generated by the action of actin polymerisation and myosin II contraction. Based on the idea that cell migration is powered by the actin-myosin network of the cell, we formulate model equations for migrating cell which comprises reaction-advection-diffusion equations that are coupled to a force balance describing the velocity vector of the network. This is a viscous model with active stresses coming from the actin-myosin system. These equations describing the migrating cells are highly nonlinear partial differential equations with no closed form solutions and we therefore result to numerical methods in order to compute the approximate solution. F-actin and myosin II solution are the solution for the reaction-advection-diffusion equations while the speeds of the cell come from the solution of the force balance equation. We begin simulations on a unit disk at zero initial velocity with different data for the initial conditions of F-actin and myosin II concentrations. We also vary some parameters at a time while keeping all the other parameters constant: for example (i) total amount of actin ρtotα and (ii) contraction coefficient for myosin II η0m. Actin polymerisation causes protrusive stress at the cell periphery which results in expansion of the cell. We observe that the initial conditions play an important role in the spatiotemporal dynamics of F-actin as well as the evolution of the cell shape. Actin changes from the active state (F-actin) to inactive state (G-actin) and vice-versa through polymerisation and depolymerisation processes and hence the total amount of actin is conserved at any time. We note that in our model, myosin II only diffuses inside the cell and exerts contractile stress in the cell. Its total concentration in the entire cell is conserved.
Análise da eficiência do uso de grampos verticais em estruturas de solo grampeado

As estruturas de solo grampeado sao estruturas que viabilizam cortes verticais ou subverticais, permitindo um maior aproveitamento de espaco. Este tipo de estrutura mostra-se presente tanto no meio urbano quanto rodoviario e ferroviario, por exemplo. Atraves da insercao de grampos na massa de solo aumenta-se o fator de seguranca contra a ruptura do talude e desta forma consegue-se manter cortes na condicao subvertical ou mesmo vertical estaveis. Na tecnica classica os grampos sao posicionados na posicao sub-horizontal. No Brasil, recentemente algumas empresas vem utilizando o procedimento de grampos na posicao subvertical ou vertical proximos a face da estrutura. O intuito desta variante da tecnica classica e aumentar a estabilidade do macico, diminuindo as deformacoes horizontais finais e durante a escavacao e tambem aumentar o fator de seguranca contra ruptura. Busca-se nesta pesquisa verificar a eficiencia do uso de grampos verticais posicionados proximos a face, verificando se estes grampos contribuem para reducao da tracao gerada nos grampos sub-horizontais, reducao das deformacoes horizontais da face e aumento do fator de seguranca da estrutura. Para modelar as estruturas sera utilizado o programa de elementos finitos Plaxis 2D e o Plaxis 3D. Para analisar o fator de seguranca tambem sera utilizado o programa Slide baseado em equilibrio limite. Os resultados para algumas analises, algumas com rigidezes usuais e outras com rigidezes mais baixas, para verificar se um sistema menos rigido sofre alteracoes significativas com a introducao de grampos verticais, ja que um sistema muito rigido pode tornar ineficiente o uso de grampos verticais. Constatou-se atraves dos resultados que houve ganhos significativos para a diminuicao dos deslocamentos horizontais e da tracao nos grampos sub-horizontais, porem, para isso foi necessario a utilizacao de um numero muito alto de grampos verticais, o que pode nao ser economicamente viavel.