Miracle-dz/UniFAR-FTUs huggingface dataset:
Sparse Bayesian Learning For Joint Channel Estimation Data Detection In OFDM Systems

Bayesian approaches for sparse signal recovery have enjoyed a long-standing history in signal processing and machine learning literature. Among the Bayesian techniques, the expectation maximization based Sparse Bayesian Learning (SBL) approach is an iterative procedure with global convergence guarantee to a local optimum, which uses a parameterized prior that encourages sparsity under an evidence maximization framework. SBL has been successfully employed in a wide range of applications ranging from image processing to communications. In this thesis, we propose novel, efficient and low-complexity SBL-based algorithms that exploit structured sparsity in the presence of fully/partially known measurement matrices. We apply the proposed algorithms to the problem of channel estimation and data detection in Orthogonal Frequency Division Multiplexing (OFDM) systems. Further, we derive Cramer Rao type lower Bounds (CRB) for the single and multiple measurement vector SBL problem of estimating compressible vectors and their prior distribution parameters. The main contributions of the thesis are as follows: • We derive Hybrid, Bayesian and Marginalized Cramer Rao lower bounds for the problem of estimating compressible vectors drawn from a Student-t prior distribution. We derive CRBs that encompass the deterministic or random nature of the unknown parameters of the prior distribution and the regression noise variance. We use the derived bounds to uncover the relationship between the compressibility and Mean Square Error (MSE) in the estimates. Through simulations, we demonstrate the dependence of the MSE performance of SBL based estimators on the compressibility of the vector. • OFDM is a well-known multi-carrier modulation technique that provides high spectral efficiency and resilience to multi-path distortion of the wireless channel. iii
On Growth of Sobolev Norms for Energy Critical NLS on Irrational Tori: Small Energy Case

We consider the energy‐critical nonlinear Schrödinger equation on a generic irrational torus. Tλ3 Using the long‐time Strichartz estimates proved in [8], we establish polynomial upper bounds for higher Sobolev norms for solutions with small energy. © 2018 Wiley Periodicals, Inc.
Risk perception and communication.

Many health risks are the result of deliberate decisions by individuals consciously trying to get the best deal possible for themselves and for those important to them. Some of these choices are private ones, such as whether to wear bicycle helmets and seatbelts, whether to read and follow safety warnings, whether to buy and use condoms, and how to select and cook food. Other choices involve societal issues, such as whether to protest the siting of hazardous waste incinerators and half-way houses, whether to vote for fluoridation and "green" candidates, and whether to support sex education in the schools. In some cases, single choices can have a large effect on health risks (e.g. buying a car with airbags, taking a dangerous job, getting pregnant). In other
New Insights for a Better Understanding of the Pusher Behavior: From Clinical to Neuroimaging Features

Disorders of postural balance are common in patients with encephalic lesions. According Tyson et al. (Tyson et al., 2006), around 80% of patients experiencing their first cerebrovascular event have static or dynamic postural imbalance. Historically, the first description of postural balance dysfunction in stroke patients dates back to more than one hundred years ago. In 1909, Beevor described the occasional lack of lateral balance in stroke patients that cause them to fall towards their contralesional side due to their paresis (Beevor, 1909). Later, Brunnstrom reported the ‘listing phenomenon’ as a list toward the affected side that patients cope by climbing onto something with their nonparetic hand to prevent listing (Brunnstrom, 1970). In 1968, a tendency to fall towards the lesion side and lateropulsion were described by Bjerver and coworkers in patients with Wallenberg’s syndrome due to dorsolateral medullary infarction (Bjerver S Brandt D Dieterich, 2007). Another postural imbalance observed in patients with encephalic lesions is thalamic astasia. According to Masdeu and Gorelick, this disorder is characterized by the inability to maintain an unsupported upright posture even without paresis or sensory or cerebellar deficits.8 When asked to sit up, patients with this disorder use the unaffected arm to pull themselves up (Masdeu & Gorelick, 1988). This behavior could be explained in part by a vestibular tone imbalance in the roll plane, especially since skew deviation was included as a feature of the syndrome (Brandt & Dieterich, 2000; Dieterich, 2007). As opposed to all other syndromes and phenomena described above, the pusher behavior (PB) is characterized by actively pushing away from the nonparetic side (Davies, 1985). Moreover, patients with PB lean to the side opposite the lesion and strongly resist any attempt at passive correction of their tilted body while sitting or standing. In the most severe cases, this resistance occurs even in a supine position (Pedersen et al., 1996; Lafosse et al., 2005). Such patients report a fear of falling towards their ipsilesional side (Davies, 1985; Pedersen et al., 1996; Lafosse et al., 2005) and are not aware that their active pushing is counterproductive and makes it impossible for them to stand without assistance (D'Aquila
Performance of electronics e-commerce during the COVID-19 pandemic: a comparative analysis

Objective(s): This study aimed to analyze the performance of electronics e-commerce during the pandemic and verify which were the most used resources in this process, listing the digital marketing strategies used to boost online sales within organizations. Method(s): Thus, a basic, descriptive, and quantitative research was developed in the first half of 2022, when a structured questionnaire was applied to the e-commerce of electronics in Sananduva, Rio Grande do Sul, Brazil. By the results presented, it was found that digital marketing is important for companies and organizations that seek to apply it on social media, in which the number of users and consumers has increased. It was found that 37% of companies believe that digital marketing has increased the dissemination of products and services and improved communication and connection with customers. Results: It is concluded that the interactivity that digital marketing provides between market and consumer has improved the approach of companies with their potential customers, since the internet offers an opening to expose products and services, in addition to knowing the opinion of the public. Contributions: It is suggested to verify consumer behavior and e-commerce after the pandemic period in the municipality of Sananduva, with the possibility of extending the study to the region.
1 0 O ct 2 01 8 A van Benthem Theorem for antitative Probabilistic Modal Logic

In probabilistic transition systems, behavioural metrics provide a more fine-grained and stable measure of system equivalence than crisp notions of bisimilarity. They correlate strongly to quantitative probabilistic logics, and in fact the distance induced by a probabilistic modal logic taking values in the real unit interval has been shown to coincide with behavioural distance. For probabilistic systems, probabilistic modal logic thus plays an analogous role to that of Hennessy-Milner logic on classical labelled transition systems. In the quantitative setting, invariance of modal logic under bisimilarity becomes non-expansivity of formula evaluation w.r. t. behavioural distance. In the present paper, we provide a characterization of the expressive power of probabilistic modal logic based on this observation:We prove a probabilistic analogue of the classical van Benthem theorem, which states that modal logic is precisely the bisimulation-invariant fragment of first-order logic. Specifically, we show that quantitative probabilistic modal logic lies dense in the bisimulation-invariant fragment, in the indicated sense of non-expansive formula evaluation, of quantitative probabilistic first-order logic; more precisely, bisimulation-invariant first-order formulas are approximable by modal formulas of bounded rank.
On the symmetry of finite sums of exponentials II

In this note we extend our study of the rich geometry of the graph of a curve defined as the weighted sum of two exponentials. Let $\gamma_{a,b}^{s}: [0,1] \rightarrow \mathbb{C}$ be defined as $$\gamma_{a,b}^s(t) = (1-s) \exp(2 \pi i a t) + (1+s) \exp(2\pi i b t) $$ in which $1\leq a<b$ are two positive integers and $s \in [-1,1]$. In the first part we determined the symmetry groups of the graphs of $\gamma_{a,b}:=\gamma_{a,b}^0$. The main aim of this note is to study the continuous transition of the graph of the curve when $s$ changes from $-1$ to $1$. As a main result we determine the winding numbers $\mathrm{wind}(\gamma_{a,b}^s,0)$ for $s \in [-1,1] \setminus \{ 0 \}$ as well as the set of cusp points of each such curve. This sheds further light on our initial symmetry result and provides more non-trivial albeit easy-to-state examples of advanced concepts of geometry and topology.
Parents of Children with Cancer Psychological Long-Term Consequences and Development of a Psychological Treatment for Parents of Survivors

Ljungman, L. 2016. Parents of Children with Cancer: Psychological Long-Term Consequences and Development of a Psychological Treatment for Parents of Survivors. Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Medicine 1273. 65 pp. Uppsala: Acta Universitatis Upsaliensis. ISBN 978-91-554-9745-3. The aims of this thesis were to increase the knowledge about the long-term psychological consequences in parents of children diagnosed with cancer, including parents of childhood cancer survivors (CCSs) and bereaved parents, and to take the first steps towards developing a psychological treatment for parents of CCSs. Study I was a systematic review synthesizing the literature on psychological long-term consequences in parents of CCSs. Study II had a longitudinal design assessing posttraumatic stress symptoms (PTSS) from shortly after the child’s diagnosis (T1, N=259) up to five years after end of the child’s treatment or death (T7, n=169). Study I and II concluded that while most parents show resilience in the long-term, a subgroup report high levels of general distress and/or PTSS. In Study III, interview data from the last assessment in the longitudinal project (T7, n=168) was used. Participants described particularly negative and/or positive experiences in relation to their child’s cancer, and results pointed to the wide range of such experiences involved in parenting a child with cancer. In Study IV and V, parents of CCSs reporting cancer-related psychological distress were included (N=15). In Study IV, a conceptualization of this distress was generated by aggregation of individual behavioral case formulations. The conceptualization consisted of two separate but overlapping paths describing development and maintenance of symptoms of traumatic stress and depressive symptoms. In Study V, cognitive behavior therapy (CBT) based on the individual case formulations were preliminarily evaluated in an open trial. The CBT appeared feasible, and at post-assessment participants reported significant decreases in PTSS (p<.001), depression (p<.001), and anxiety (p<.01) with medium to large effect sizes (Cohen’s d=0.65-0.92). Findings indicate that psychological long-term consequences in parents of children with cancer consist of a broad range of negative as well as positive experiences, and that while most parents show resilience in the long-term, a subgroup report high levels of psychological distress. For parents of CCSs this distress is suggested to primarily consist of symptoms of traumatic stress and depression, and a preliminary evaluation of CBT targeting hypothesized maintaining mechanisms showed promise in terms of feasibility and treatment effect.
On the Implicit Bias Towards Minimal Depth in Deep Neural Networks

We study the implicit bias of gradient based training methods to favor low-depth solutions when training deep neural networks. Recent results in the literature suggest that penultimate layer representations learned by a classiﬁer over multiple classes exhibit a clustering property, called neural collapse. We demonstrate empirically that the neural collapse property extends beyond the penultimate layer and tends to emerge in intermediate layers as well. In this regards, we hypothesize that gradient based methods are implicitly biased towards selecting neural networks of minimal depth for achieving this clustering property
Two-Phase Pulsed Flow of a Non Newtonian Fluid in Pipe with Elastic Wall

The object of this study is to show certain specific effects caused by rheological and elastic parameters in a pulsating flow of non Newtonian two-fluid models through elastic tube. A numerical finite difference method using Crank Nicholson scheme is employed to determine pressure and velocity profiles. This study is considered as a step in two-phase flow of blood in small vessels.
× 1 S : K × C Compute Inverse Density Scale tile F : Conv Fout

Unlike images which are represented in regular dense grids, 3D point clouds are irregular and unordered, hence applying convolution on them can be difficult. In this paper, we extend the dynamic filter to a new convolution operation, named PointConv. PointConv can be applied on point clouds to build deep convolutional networks. We treat convolution kernels as nonlinear functions of the local coordinates of 3D points comprised of weight and density functions. With respect to a given point, the weight functions are learned with multi-layer perceptron networks and the density functions through kernel density estimation. A novel reformulation is proposed for efficiently computing the weight functions, which allowed us to dramatically scale up the network and significantly improve its performance. The learned convolution kernel can be used to compute translation-invariant and permutation-invariant convolution on any point set in the 3D space. Besides, PointConv can also be used as deconvolution operators to propagate features from a subsampled point cloud back to its original resolution. Experiments on ModelNet40, ShapeNet, and ScanNet show that deep convolutional neural networks built on PointConv are able to achieve state-ofthe-art on challenging semantic segmentation benchmarks on 3D point clouds. Besides, our experiments converting CIFAR-10 into a point cloud showed that networks built on PointConv can match the performance of convolutional networks in 2D images of a similar structure.
Where are the missing galactic satellites?

Using published data, we have compiled the circular velocity (Vc) distribution function (VDF) of galaxy satellites in the Local Group. We find that within the volumes of radius of 570 kpc (400/h kpc for h=0.7) centered on the Milky Way and Andromeda, the average VDF is roughly approximated as n(>Vc)~ 45(Vc/10 km/s)^{-1} h^3 Mpc^{-3} for Vc in the range ~10-70 km/s. The observed VDF is compared with results of high-resolution cosmological simulations. We find that the VDF in models is very different from the observed one: n(>Vc)~1200(Vc/10 km/s)^{-2.75}h^3 Mpc^{-3}. Cosmological models thus predict that a halo of the size of our Galaxy should have about 50 dark matter satellites with circular velocity>20 km/s and mass>3x10^8/h Msun within a 570 kpc radius. This number is significantly higher than the approximate dozen satellites actually observed around our Galaxy. The observed and predicted VDFs cross at ~50 km/s, indicating that the predicted abundance of satellites with Vc>50 km/s is in reasonably good agreement with observations. We conclude, therefore, that unless a large fraction of the Local Group satellites has been missed in observations, there is a dramatic discrepancy between observations and hierarchical models, regardless of the model parameters. We discuss several possible explanations for this discrepancy including identification of some satellites with the High Velocity Clouds observed in the Local Group, and the existence of dark satellites that failed to accrete gas and form stars due either to the expulsion of gas in the supernovae-driven winds or to gas heating by the intergalactic ionizing background. (Abridged)
RESPONSE OF DARK MATTER HALOS TO CONDENSATION OF BARYONS : COSMOLOGICAL SIMULATIONS AND IMPROVED ADIABATIC CONTRACTION MODEL

The cooling of gas in the centers of dark matter halos is expected to lead to a more concentrated dark matter distribution. The response of dark matter to the condensation of baryons is usually calculated using the model of adiabatic contraction, which assumes spherical symmetry and circular orbits. In contrast, halos in the hierarchical structure formation scenarios grow via multiple violent mergers and accretion along filaments, and particle orbits in the halos are highly eccentric. We study the effects of the cooling of gas in the inner regions of halos using high-resolution cosmological simulations which include gas dynamics, radiative cooling, and star formation. We find that the dissipation of gas indeed increases the density of dark matter and steepens its radial profile in the inner regions of halos compared to the case without cooling. For the first time, we test the adiabatic contraction model in cosmological simulations and find that the standard model systematically overpredicts the increase of dark matter density in the inner 5% of the virial radius. We show that the model can be improved by a simple modification of the assumed invariant from M(r)r to M(r̄)r, where r and r̄ are the current and orbit-averaged particle positions. This modification approximately accounts for orbital eccentricities of particles and reproduces simulation profiles to within 10 − 20%. We present analytical fitting functions that accurately describe the transformation of the dark matter profile in the modified model and can be used for interpretation of observations. Subject headings: cosmology: theory — dark matter : halos: structure — galaxies: formation — methods: numerical simulations
Low-Mass X-Ray Binaries and Globular Clusters in Early-Type Galaxies

A high fraction of the low-mass X-ray binaries (LMXBs) in early-type galaxies are associated with globular clusters (GCs). Here we discuss the correlations between LMXBs and GCs in a sample of four early-type galaxies with X-ray source lists determined from Chandra observations. There is some evidence that the fraction of LMXBs associated with GCs (fX-GC) increases along the Hubble sequence from spiral bulges (or spheroids) to S0s to Es to cDs. On the other hand, the fraction of GCs that contain X-ray sources appears to be roughly constant at fGC-X ~ 4%. There is a strong tendency for the X-ray sources to be associated with the optically more luminous GCs. However, this correlation is consistent with a constant probability of finding an LMXB per unit optical luminosity; that is, it seems to result primarily from the larger number of stars in optically luminous GCs. The probability of finding a bright LMXB per unit optical luminosity in the GCs is about 1.5 × 10-7 LMXBs per L☉,I for LX ≳ 1 × 1038 ergs s-1 (0.3-10 keV) and rises to about 2.0 × 10-7 LMXBs per L☉,I at lower X-ray luminosities, LX ≳ 3 × 1037 ergs s-1. This frequency appears to be roughly constant for different galaxies, including the bulges of the Milky Way and M31. There is a tendency for the X-ray sources to be found preferentially in redder GCs, which is independent of optical luminosity correlation. This seems to indicate that the evolution of X-ray binaries in a GC is affected by either the metallicity or the age of the GC, with younger and/or more metal rich GCs having more LMXBs. There is no strong difference in the X-ray luminosities of GC and non-GC LMXBs. There is a weak tendency for the brightest LMXBs, whose luminosities exceed the Eddington luminosity for a 1.4 M☉ neutron star, to avoid GCs. That may indicate that black hole X-ray binaries are somewhat less likely to be found in GCs, as seems to be true in our Galaxy. On the other hand, there are some luminous LMXBs associated with GCs. There is no clear evidence that the X-ray spectra or variability of GC and non-GC X-ray sources differ. We also find no evidence for a difference in the spatial distribution of GC and non-GC LMXBs. Many of these results are similar to those found in NGC 1399 and NGC 4472 by Angelini et al. and Kundu et al., respectively.
Valuasi Ekonomi Kusuma Agrowisata Kota Batu, Jawa Timur

Industri pariwisata menjadi industri yang memiliki potensi untuk dilakukan pengembangan. Jenis pariwisata yang memiliki potensi besar untuk pengembangan adalah wisata alam, salah satunya Kusuma Agrowisata. Kusuma Agrowisata menjadi salah satu wisata alam berbasis agronomi yang terletak di Kota Batu. Tujuan dari penelitian ini adalah 1) Untuk mengetahui bagaimana persepsi konsumen terhadap fasilitas, pelayanan, dan infrastruktur di Kusuma Agrowisata, 2) Untuk menganalisis faktor-faktor yang mempengaruhi permintaan wisata di Kusuma Agrowisata, dan 3) untuk mengestimasi nilai surplus konsumen dan nilai ekonomi wisata dari Kusuma Agrowisata. Dengan melihat nilai tersebut nantinya dapat ditarik kesimpulan apakah biaya yang telah dikeluarkan pengunjung telah sesuai dengan wisata yang ditawarkan Kusuma Agrowisata. Lokasi penelitian ditentukan secara purposive di Kusuma Agrowisata dengan mempertimbangkan bahwa Kusuma Agrowisata merupakan salah satu wisata berbasis agronomi. Penelitian dilakukan pada bulan April – Mei 2016. Sampel ditentukan dengan metode non-probability sampling dengan tipe sampling critical case sampling. Analisis faktor-faktor yang mempengaruhi permintaan wisata dilakukan dengan regresi linier berganda sedangkan metode untuk menganalisis nilai surplus konsumen menggunakan Individual Travel Cost Method (ITCM) yaitu melihat besar surplus konsumen dengan menganalisis seluruh biaya perjalanan yang dikeluarkan. Akumulasi nilai surplus konsumen tersebut dapat menghasilkan nilai ekonomi wisata Kusuma Agrowisata. Hasil dari penelitian ini adalah fasilitas toilet dan tempat ibadah yang disediakan oleh pengelola Kusuma Agrowisata dinilai oleh responden kurang memadai. Sementara itu, faktor-faktor yang berpengaruh signifikan terhadap permintaan wisata adalah biaya perjalanan, tingkat pendidikan, tingkat pendapatan, dan jumlah rombongan. Sedangkan nilai surplus konsumen dan nilai ekonomi wisata Kusuma Agrowisata masing-masing adalah Rp. 1.373. 113,17 dan Rp. 419.623. 385.898,00.
Multiplicative Pacing Equilibria in Auction Markets

Budgets play a significant role in ad markets that implement sequential auctions such as those hosted by internet companies. In “Multiplicative Pacing Equilibria in Auction Markets,” the authors look at pacing in an ad marketplace using the lens of game theory. The goal is understanding how bids must be shaded to maximize advertiser welfare, at equilibrium. Motivated by the real-world auction mechanism, they construct a game where advertisers in the auctions choose a multiplicative factor not larger than 1 to possibly reduce their bids and best respond to the other advertisers. The article studies the theoretical properties of the game such as existence and uniqueness of equilibria, offers an exact algorithm to compute them, connects the game to well-known abstractions such as Fisher markets, and performs a computational study with real-world-inspired instances. The main insights are that the solutions to the studied game can be used to improve the outcomes achieved by a closer-to-reality dynamic pacing algorithm and that buyers do not have an incentive to misreport bids or budgets when there are enough participants in the auction.