Miracle-dz/UniFAR-FTUs huggingface dataset:
Ieee Transactions on Wireless Communications 1 Simultaneous Water Filling in Mutually Interfering Systems

In this paper we investigate properties of simultaneous water filling for a wireless system with two mutually interfering transmitters and receivers with non-cooperative coding strategies. This is slightly different from the traditional interference channel problem which assumes that transmitters cooperate in their respective coding strategies, and that interference cancellation can be performed at the receivers. In this non-cooperative setup, greedy capacity optimization by individual transmitters through various algorithms leads to simultaneous water filling fixed points where the spectrum of the transmit covariance matrix of one user water fills over the spectrum of its corresponding interference-plus-noise covariance matrix, and in our paper we study the properties of these fixed points. We show that at a simultaneous water filling point the eigenvectors of transmit covariance matrices at each receiver are aligned, and identify three regimes which correspond to simultaneous water filling that depend on the interference gains: a) complete spectral overlap, b) partial spectral overlap, and c) spectral segregation. These imply that the transmit covariance matrices will be white in regions of both overlap and segregation, but not necessarily white overall. We also consider performance as a function of interference gain and show that complete spectral overlap is a strongly suboptimal solution over a wide range of gains. Overall, our results suggest that for strong mutual interference, an effort should be made to do joint decoding over receivers since such collaboration can provide large capacity increases. For moderate interference, distributed and/or centralized conflict resolution algorithms would be most effective since more complex collaborative methods do not afford much improvement and strictly greedy methods such as water filling perform poorly, while for weak interference a laissez faire approach seems reasonable.
Stability Analysis and Stabilization of Systems With Input Backlash

This technical note deals with the stability analysis and stabilization of linear systems with backlash in the input. Uniform ultimate boundedness stability and stabilization problems are tackled allowing to characterize suitable regions of the state space in which the closed-loop trajectories can be captured. In the state feedback control design, computational oriented solutions are derived to solve suboptimal convex optimization problems able to give a constructive solution.
Genome-Wide Transcriptional Profiling Reveals Two Distinct Outcomes in Central Nervous System Infections of Rabies Virus

Rabies remains a major public health concern in many developing countries. The precise neuropathogenesis of rabies is unknown, though it is hypothesized to be due to neuronal death or dysfunction. Mice that received intranasal inoculation of an attenuated rabies virus (RABV) strain HEP-Flury exhibited subtle clinical signs, and eventually recovered, which is different from the fatal encephalitis caused by the virulent RABV strain CVS-11. To understand the neuropathogenesis of rabies and the mechanisms of viral clearance, we applied RNA sequencing (RNA-Seq) to compare the brain transcriptomes of normal mice vs. HEP-Flury or CVS-11 intranasally inoculated mice. Our results revealed that both RABV strains altered positively and negatively the expression levels of many host genes, including genes associated with innate and adaptive immunity, inflammation and cell death. It is found that HEP-Flury infection can activate the innate immunity earlier through the RIG-I/MDA-5 signaling, and the innate immunity pre-activated by HEP-Flury or Newcastle disease virus (NDV) infection can effectively prevent the CVS-11 to invade central nervous system (CNS), but fails to clear the CVS-11 after its entry into the CNS. In addition, following CVS-11 infection, genes implicated in cell adhesion, blood vessel morphogenesis and coagulation were mainly up-regulated, while the genes involved in synaptic transmission and ion transport were significantly down-regulated. On the other hand, several genes involved in the MHC class II-mediated antigen presentation pathway were activated to a greater extent after the HEP-Flury infection as compared with the CVS-11 infection suggesting that the collaboration of CD4+ T cells and MHC class II-mediated antigen presentation is critical for the clearance of attenuated RABV from the CNS. The differentially regulated genes reported here are likely to include potential therapeutic targets for expanding the post-exposure treatment window for RABV infection.
Mesenchymal Stem Cells and Induced Pluripotent Stem Cells as Therapies for Multiple Sclerosis

Multiple sclerosis (MS) is a chronic, autoimmune, inflammatory demyelinating disorder of the central nervous system that leads to permanent neurological deficits. Current MS treatment regimens are insufficient to treat the irreversible neurological disabilities. Tremendous progress in the experimental and clinical applications of cell-based therapies has recognized stem cells as potential candidates for regenerative therapy for many neurodegenerative disorders including MS. Mesenchymal stem cells (MSC) and induced pluripotent stem cell (iPSCs) derived precursor cells can modulate the autoimmune response in the central nervous system (CNS) and promote endogenous remyelination and repair process in animal models. This review highlights studies involving the immunomodulatory and regenerative effects of mesenchymal stem cells and iPSCs derived cells in animal models, and their translation into immunomodulatory and neuroregenerative treatment strategies for MS.
Monocular vision-based vehicular speed estimation from compressed video streams

This paper introduces a monocular vision-based vehicular speed estimation algorithm that operates in the compressed domain. The algorithm relies on the use of motion vectors associated with video compression to achieve computationally efficient and accurate speed estimation. Building the speed estimation directly into the compression step adds only a small amount of computation which is conducive to real-time performance. We demonstrate the effectiveness of the algorithm on 30 fps video of one hundred and forty vehicles travelling at speeds ranging from 30 to 60 mph. The average speed estimation accuracy of our algorithm across the test set was better than 2.50% at a yield of 100%, with the accuracy increasing as the yield decreases and as the frame rate increases.
Bcl6 in pulmonary epithelium coordinately controls the expression of the CC‐type chemokine genes and attenuates allergic airway inflammation

Background There is synteny in the CC‐type chemokine gene clusters between humans (CCL2/MCP‐1, CCL7MCP‐3, CCL11/eotaxin, CCL8/MCP‐2, CCL13/MCP‐4, and CCL1/I‐309) and mice (CCL2, CCL7, CCL11, CCL12/MCP‐5, CCL8, and CCL1).
Optimization of the Material of External Fixator with FEM Simulation

Patients and surgeons with tibia fracture using external fixator are worried about a higher weight of metal fixator´s construction and therefore also poor manipulation ability with this tool [1]. During the last few years the bone tissue engineering has improved significantly and along with that also material development has increased [2,3]. Therefore patients requirements can be achieved by optimizing the material composition of this product. The main objective of this research is a weight reduction by material and design changes of the external fixator. Another aim is the evaluation of the final model. The model of innovative fixator was created and also computed in software CATIA V5-6 using finite element method simulation. Appropriate forces were applied and the simulation was performed. Results of FEM simulation indicate that the final weight of complete product declined significantly after application of carbon-fiber composite. Test results also suggest that the rigidity and the stability of complete fixator are safe. Hence this research describes that application of carbon fiber composite into the external fixator design is an important improvement of the external fixator.
Interval Minors of Complete Bipartite Graphs

Interval minors of bipartite graphs were recently introduced by Jacob Fox in the study of Stanley–Wilf limits. We investigate the maximum number of edges in Kr,s ‐interval minor‐free bipartite graphs. We determine exact values when r=2 and describe the extremal graphs. For r=3 , lower and upper bounds are given and the structure of K3,s ‐interval minor‐free graphs is studied.
DSNotify - Detecting and Fixing Broken Links in Linked Data Sets

The Linking Open Data (LOD) initiative has motivated numerous institutions to publish their data on the Web and to interlink them with those of other data sources. But since LOD sources are subject to change, links between resources can break and lead to processing errors in applications that consume linked data. The current practice is to ignore this problem and leave it to the applications what to do when broken links are detected. We believe, however, that LOD data sources should provide the highest possible degree of link integrity in order to relieve applications from this issue, similar to databases that provide mechanisms to preserve referential integrity in their data. As a possible solution, we propose DSNotify, an add-on for LOD sources that detects broken links and assists the data source in fixing them, e.g., when resources were moved to other Web locations.
Computational Gene knockout reveals Transdisease-Transgene Association Structure

Genome-wide association studies for a variety of diseases are identifying increasing numbers of candidate genes. Now we are confronted with the fact that some genes are common candidates across diseases. Thus there is a strong need to develop a hypothesis formulation methodology to comprehend multifaceted associations between genes and diseases. We have developed a computational method for building transdisease-transgene association structure. By introducing the basic rationale underlying the gene knockout approach as an information processing procedure to a network constructed on the basis of hyperlinks between disease and gene pages listed in the Online Mendelian Inheritance in Man (OMIM) database, relations of genes with diseases are computationally quantified. We did successively eliminate gene pages (called "computational gene knockout" in this paper) expected to contribute to metabolic syndrome, and catalogued each association with various disease pages. We thereby apply a co-clustering method to the gene-disease relations to obtain an association structure by classifying diseases and genes simultaneously. Observing an association structure between over 100 diseases and their related genes, we then found that the structure revealed gene classes that were commonly associated with diseases as well as gene classes that were selectively associated with a specific disease class.
Study of a low Re airfoil considering laminar separation bubbles in static and pitching motion

Performance of low Reynolds number (Re) devices is highly dependent on their airfoil design. Small wind turbines that usually work in areas with poor wind resources with a vast application from remote to busy urban regions are no exception. The unsteady flow field around the turbine blade results in an unsteady boundary layer that makes aerodynamics of these turbines complex and interesting. But due to the complexity of unsteady low Reynolds flow, and the small scale of boundary layer flow there are still unanswered questions in this area. Therefore, this study is arranged to fully investigate low Reynolds number boundary layer flow in steady and unsteady flow using small scale experiments. For this goal, three non-intrusive experimental techniques used to study low Re flow behavior over a miniature SD7037 airfoil including surface oil flow visualization (SOFV), IR-Thermography (IT), and particle image velocimetry (PIV) at 14000 ≤ Re ≤ 48000 have been developed and utilized. To model unsteady flow a pitch oscillation about the static stall angle of attack with amplitude 9◦ was considered. The quality of acquired results from all the experimental methods confirms the possibility of downscaling of low Reynolds flow experiments. Flow parameters such as the separation and reattachment points were quantitatively determined from SOFV and IT. The high-resolution PIV measurements provided an accurate velocity field so that surface pressure distribution and estimation of skin friction coefficient were determined from the velocity fields in both the steady and unsteady flow where due to the scale of the experiment and low magnitude of shear stress other measurement techniques would be intrusive or cannot be used. Estimated surface pressure coefficient (Cp) from PIV data revealed vortical structure effects as lowpressure waves that cannot be captured with coarse resolution methods. Integral boundary layer parameters are calculated in steady and unsteady conditions that provide in-depth information regarding low Re boundary layer flow behavior and laminar separation bubble characteristics. Boundary layer flow and reversed flow under the separated bubble were captured precisely while the Field of View covers the whole airfoil and results were confirmed by acquired data using finer spatial resolution. The measured aerodynamic force shows the effect of the height of the bubble on increasing the drag and the proper orthogonal decomposition method provided more information regarding the time-dependent behavior of vortices.
Exposure Reduction or Retaliation? The Effects of Domestic Violence Resources on Intimate‐Partner Homicide

Rates of homicide involving intimate partners have declined substantially over the past 25 years in the United States, while public awareness of and policy responses to domestic violence have grown. To what extent has the social response to domestic violence contributed to the decline in intimate-partner homicide? We evaluate the relationship between intimate-partner homicide and domestic violence prevention resources in 48 large cities between 1976 and 1996. Controlling for other influences, several types of prevention resources are linked to lower levels of intimate-partner homicide, which we interpret in terms of their capacity to effectively reduce victims' exposure to abusive or violent partners. Other resources, however, are related to higher levels of homicide, suggesting a retaliation effect when interventions stimulate increased aggression without adequately reducing exposure. In light of other research on deficiencies in accessing and implementing prevention resources, our results suggest that too little exposure reduction in severely violent relationships may be worse than none at all.
Secure the Internet, One Home at a Time

These growing threats and broad damages have made it imperative to understand, characterize, filter, and reduce exploit traffic towards millions of home routers and billions of connected devices in the home. This paper presents a bloom-filter based analytic framework to capture persistent threats towards the same home routers and to identify correlated attacks towards distributed home networks. Our experimental results based on network traffic collected from real homes over 18 months have revealed a number of interesting findings on persistent and correlated threats towards home networks, which calls for improved security and management of home networks. To the best of our knowledge, this paper is the first effort to characterize cyber threats towards home networks and to propose a simple and yet effective approach to identify persistent and aggressive attacks towards home networks.
Interference Assisted Secret Communication

Wireless communication is susceptible to eavesdropping attacks because of its broadcast nature. This paper illustrates how interference can be used to counter eavesdropping and assist secrecy. In particular, a wiretap channel with a helping interferer (WT-HI) is considered. Here, a transmitter sends a confidential message to its intended receiver in the presence of a passive eavesdropper and with the help of an independent interferer. The interferer, which does not know the confidential message, helps in ensuring the secrecy of the message by sending an independent signal. An achievable secrecy rate and several computable outer bounds on the secrecy capacity of the WT-HI are given for both discrete memoryless and Gaussian channels.
Identification of predominent frequencies in a speech signal using modeling of vocal chord

A great problem in speech communication is to identify the shape and characteristics of the vocal apparatus. This task is normally done by using a vocal tract model, based on the calculation of the function, area would be performed. We will show that these models have good performance in experiments. A mathematical model of voice box has been obtained. We suggest a new numerical method without saturation, which allows solving the problem in a wide range of frequencies with an arbitrary and controlled precision. The low sound frequencies cause the detection of the membrane at the upper part of the cochlea, whereas high sound frequencies cause the detection of the main volute of the cochlea.
Scheduler Vulnerabilities and Attacks in Cloud Computing

In hardware virtualization a hypervisor provides multiple Virtual Machines (VMs) on a single physical system, each executing a separate operating system instance. The hypervisor schedules execution of these VMs much as the scheduler in an operating system does, balancing factors such as fairness and I/O performance. As in an operating system, the scheduler may be vulnerable to malicious behavior on the part of users seeking to deny service to others or maximize their own resource usage. Recently, publically available cloud computing services such as Amazon EC2 have used virtualization to provide customers with virtual machines running on the provider's hardware, typically charging by wall clock time rather than resources consumed. Under this business model, manipulation of the scheduler may allow theft of service at the expense of other customers, rather than merely reallocating resources within the same administrative domain. We describe a flaw in the Xen scheduler allowing virtual machines to consume almost all CPU time, in preference to other users, and demonstrate kernel-based and user-space versions of the attack. We show results demonstrating the vulnerability in the lab, consuming as much as 98% of CPU time regardless of fair share, as well as on Amazon EC2, where Xen modifications protect other users but still allow theft of service. In case of EC2, following the responsible disclosure model, we have reported this vulnerability to Amazon; they have since implemented a fix that we have tested and verified (See Appendix B). We provide a novel analysis of the necessary conditions for such attacks, and describe scheduler modifications to eliminate the vulnerability. We present experimental results demonstrating the effectiveness of these defenses while imposing negligible overhead.
Combined Stellar Structure and Atmosphere Models for Massive Stars I. Interior Evolution and Wind Properties on the Main Sequence

We present the rst \combined stellar structure and atmosphere models" (CoStar) for massive stars, which consistently treat the entire mass loosing star from the center out to the asymptotic wind velocity. The models use up-to-date input physics and state-of-the-art techniques to model both the stellar interior and the spherically expanding non{LTE atmosphere including line blan-keting. Our models thus yield consistent predictions regarding not only the basic stellar parameters, including abundances, but also theoretical spectra along evolutionary tracks. On the same ground they allow us to study the innuence of stellar winds on evolutionary models. In this rst paper, we present our method and investigate the wind properties and the interior evolution on the main sequence (MS) at solar metallicity. The wind momentum and energy deposition associated with the MS evolution is given and the adopted wind properties are discussed. From our atmosphere calculations , which include the eeect of multiple scattering and line overlap, we also derive theoretical estimates of mass loss driven by radiation pressure. These values are compared with the predictions from recent wind models of the Munich group (Pauldrach et al. 1990, 1994, Puls et al. 1995). We nd an overall agreement with most of their results. In addition, our models are better in reproducing the strong wind momentum rates observed in supergiants than those of Puls et al. A comparison between boundary conditions given by the conventional plane parallel and the new spherically expanding atmosphere approach is made. For the MS evolution the evolutionary tracks and the interior evolution are found to be basically unchanged by the new treatment of the outer layers. However, for stars close to the Ed-dington limit, a small uncertainty in the behaviour of the Send ooprint requests to: D. Schaerer deep atmosphere is found which might marginally aaect the evolution. Given the small spherical extension of the continuum forming layers in the considered evolutionary phases, the predicted stellar parameters diier negligibly from those obtained using plane parallel atmospheres. { fundamental parameters { Hertzsprung-Russel (HR) diagram { mass{loss
Comparison of Traditional Inverters and $Z$ -Source Inverter for Fuel Cell Vehicles

In this paper, three different inverters: conventional pulsewidth modulation (PWM) inverter, dc-dc boosted PWM inverter, and Z-source inverter were investigated and compared for fuel cell vehicle application. Total switching device power, passive components requirement, and constant power speed ratio of each of these inverters were calculated. For purposes of comparison, an example of the total switching device power, requirement of passive components, the constant power speed ratio, and the efficiencies of the different inverters for fuel cell vehicle powered by the same fuel cell were conducted. The comparisons show that the Z-source inverter is very promising in applications when the boost ratio is low (1-2).
Single Photoemitter Tips in a DC Gun: Limiting Aberration-induced Emittance

Ultrafast electron diffraction (UED) is a rapidly growing field in which there is an increasing need for higher beam brightness, especially for space charge-dominated singleshot applications. We explore the utilization of a cathode field-enhancing micron-scale tip inside a dc gun to obtain brighter sub-pC electron beams using a nominal cathode electric field of 10 MV/m, and peak tip emission fields up to ∼ 100 MV/m. As a first step, here we consider the effects of the curvature of the tip geometry on the emittance (without space charge), and determine the conditions for a few simple tip shapes that provide geometry-induced emittance growth smaller than the very low intrinsic emittance of cryogenically cooled multialkali photocathodes.
Insitu Self-Assembly of Bacterial Cellulose on Banana Fibers Extracted from Peels

ABSTRACT In this research work, in-situ self-assembly approach was used the first time, to cultivate bacterial cellulose on the surface of fibers, extracted from banana peels. The characterization was performed using SEM, FTIR, and single fiber tensile test in order to determine the surface morphology and mechanical properties of modified fibers. As-prepared hybrid fibers exhibited comparatively better mechanical properties, which can be attributed to the self-assembly of bacterial cellulose on banana fibers’ surface. Overall, this research work suggests a novel route for fiber extraction from banana peels and to use them for the preparation of bio nano-composites with improved mechanical properties.