Miracle-dz/UniFAR-FTUs huggingface dataset:
An Admission Control Scheme Based on Transmissions Scheduling for Wireless Mesh Networks

WMNs are a very attractive field of research as they are low cost, easily deployed and high performance solution to last mile broadband Internet access. However they have to deal with a lack of bandwidth which prevents the deployment of applications with strict constraints (e.g. VoIP, streaming video, etc.). To overcome this limitation, we introduce a novel WMN model which integrates a bandwidth-based admission control scheme with an efficient transmission scheduling algorithm. The proposed admission control is based on an accurate new method to calculate link's bandwidth considering link's length and on a transmissions scheduling algorithm which favors parallel transmission, thus optimizing network's bandwidth.
2 Standard models of inflation in the short run build upon the work of Friedman

This paper considers whether the Phillips curve can explain the recent behavior of inflation in the United States. Standard formulations of the model predict that the ongoing large shortfall in economic activity relative to full employment should have led to deflation over the past several years. I confirm previous findings that the slope of the Phillips curve has varied over time and probably is lower today than it was several decades ago. This implies that estimates using historical data will overstate the responsiveness of inflation to present-day economic conditions. I modify the traditional Phillips curve to explicitly account for time variation in its slope and show how this modified model can explain the recent behavior of inflation without relying on anchored expectations. Specifically, I explore reasons why the slope might vary over time, focusing on implications of the sticky-price and sticky-information approaches to price adjustment. These implications suggest that the inflation environment and uncertainty about regional economic conditions should influence the slope of the Phillips curve. I introduce proxies to account for these effects and find that a Phillips curve modified to allow its slope to vary with uncertainty about regional economic conditions can best explain the recent path of inflation. JEL Classification: E30, E31
Effects of polarization and radiation diagram of antennas in RFID systems for positioning purposes

Radio Frequency Identification (RFID) is a wireless system designed to identify the presence of objects attached by tags. In recent times, RFID is also used for positioning purposes. We show a scenario of wireless propagation observed by eight antennas with different polarization located in different positions. In this way, the polarization and diagram radiation of the antennas will play a significant role in producing electromagnetic field in the region.
On the Weakness of Fully Homomorphic Encryption

Fully homomorphic encryption (FHE) allows anyone to perform computations on encrypted data, despite not having the secret decryption key. Since the Gentry's work in 2009, the primitive has interested many researchers. In this paper, we stress that any computations performed on encrypted data are constrained to the encrypted domain (finite fields or rings). This restriction makes the primitive useless for most computations involving common arithmetic expressions and relational expressions. It is only applicable to the computations related to modular arithmetic. We want to reaffirm that cryptography uses modular arithmetic a lot in order to obscure and dissipate the redundancies in a plaintext message, not to perform any numerical calculations. We think it might be an overstated claim that FHE is of great importance to client-server computing or cloud computing.
Phase-gradient metasurfaces for beam steerable antennas

Metasurfaces presenting a phase-gradient are designed at 10 GHz and are proposed to steer an antenna's radiated beam from broadside towards endfire direction. The metasurfaces are composed of both inductive and capacitive grids and the phase-gradient is achieved by modifying the elements in the inductive grid. Such phase-gradient metasurfaces are utilized as Partially Reflecting Surfaces (PRS) in Fabry-Pérot (FP) leaky-wave antennas (LWAs). Depending on the gradient used, beam steering up to 60° has been observed numerically and verified experimentally.
Multiple Views on Filtering: Consumers, Producers and Filtering Technology Designers

information filtering We discuss the implications of information consumer and producer needs for the provider of basic filtering technology. To understand the consumer point of view, we outline seven different filtering goals that cover a wide variety of filtering questions, including obtaining an overview, identifying a trend, and finding a match between a prototype and an instantiation. We discuss three problems from the producer point of view: structuring information, disseminating information and selecting a medium in which to express information. Both the consumer and producer perspectives are illustrated by examples from the domains of clinical patient care, medical research, and industrial product development.
Teacher-teacher aide teaming: investigating collaboration using cogenerative dialoguing and CHAT

i Declaration by author . iii Acknowledgements . v Table of contents . viii List of figures . xiv List of tables . xv List of appendices . xv List of abbreviations . xv Chapter
Book Reviews: The Computational Nature of Language Learning and Evolution, by Partha Niyogi

The nature of the interplay between language learning and the evolution of a language over generational time is subtle. We can observe the learning of language by children and marvel at the phenomenon of language acquisition; the evolution of a language, however, is not so directly experienced. Language learning by children is robust and reliable, but it cannot be perfect or languages would never change -- and English, for example, would not have evolved from the language of the Anglo-Saxon Chronicles. In this book Partha Niyogi introduces a framework for analyzing the precise nature of the relationship between learning by the individual and evolution of the population. Learning is the mechanism by which language is transferred from old speakers to new. Niyogi shows that the evolution of language over time will depend upon the learning procedure -- that different learning algorithms may have different evolutionary consequences. He finds that the dynamics of language evolution are typically nonlinear, with bifurcations that can be seen as the natural explanatory construct for the dramatic patterns of change observed in historical linguistics. Niyogi investigates the roles of natural selection, communicative efficiency, and learning in the origin and evolution of language -- in particular, whether natural selection is necessary for the emergence of shared languages. Over the years, historical linguists have postulated several accounts of documented language change. Additionally, biologists have postulated accounts of the evolution of communication systems in the animal world. This book creates a mathematical and computational framework within which to embed those accounts, offering a research tool to aid analysis in an area in which data is often sparse and speculation often plentiful.
Profiling for Mobility Context Management and Transport Service Provision in 4G Networks

Currently, mobile service provision is facing important advancements towards more flexible business models and fresh Internet-like services with the internetworking of several complementary access technologies using the Internet Protocol (IP) as a mean of integration. The result of such integration, also known as ? 4th Generation Networks? , will require the provision of a ? persistent transport service? of for users? session flows and transactions. In this paper we present the conceptual high level description of a context-based management distributed service and profiling system in order to provide this persistent transport for mobile user? s data applications in a heterogeneous environment of IP-based network.
Vascular remodeling of the mouse yolk sac requires hemodynamic force

The embryonic heart and vessels are dynamic and form and remodel while functional. Much has been learned about the genetic mechanisms underlying the development of the cardiovascular system, but we are just beginning to understand how changes in heart and vessel structure are influenced by hemodynamic forces such as shear stress. Recent work has shown that vessel remodeling in the mouse yolk sac is secondarily effected when cardiac function is reduced or absent. These findings indicate that proper circulation is required for vessel remodeling, but have not defined whether the role of circulation is to provide mechanical cues, to deliver oxygen or to circulate signaling molecules. Here, we used time-lapse confocal microscopy to determine the role of fluid-derived forces in vessel remodeling in the developing murine yolk sac. Novel methods were used to characterize flows in normal embryos and in embryos with impaired contractility (Mlc2a-/-). We found abnormal plasma and erythroblast circulation in these embryos, which led us to hypothesize that the entry of erythroblasts into circulation is a key event in triggering vessel remodeling. We tested this by sequestering erythroblasts in the blood islands, thereby lowering the hematocrit and reducing shear stress, and found that vessel remodeling and the expression of eNOS (Nos3) depends on erythroblast flow. Further, we rescued remodeling defects and eNOS expression in low-hematocrit embryos by restoring the viscosity of the blood. These data show that hemodynamic force is necessary and sufficient to induce vessel remodeling in the mammalian yolk sac.
MARISIL – User Interface Framework for Future Mobile

Mobile mediaphone is personal wireless telecommunication device foreseen to come within the next three to five years along the 3 generation broadband mobile networks, known as UMTS and IMT2000. The mediaphone will enable a range of advanced multimedia services, such as personal navigation, mobile shopping, multimedia entertainment, interactive games, and telepresence. Mediaphone concept design poses a difficult tradeoff between physical size, weight, functionality and usability. Reducing size and weight can be done as long as usability is there, but going further, it is becoming more difficult for people to use a terminal and its services. Yet the mediaphone will be richer in features than any portable device before. A novel approach is proposed to come out of the difficult tradeoff between physical dimensions, functionality and usability. Our approach is based on augmented reality extension of the user interface and image processing based user interaction scheme. We propose a table-driven MARISIL sign language mechanisms to be employed. In this short paper we describe the basic principles.
Effects of guided arrows on head-up display towards the vehicle windshield

The concept of head-up display has gained wide acceptance being used for military aviation and has also spread to commercial aviation. Head up display (HUD) is now being used in automobiles to assist with navigation. The advantage of this system is reducing the number and duration of the driver's sight deviations from the road, by projecting graphic information on the windshield. Nevertheless, there has been little study as to how to use the super-imposed graphic such as guided arrows for car navigation system. The aim of the study is to evaluate the superimposition properties between the guided arrow marked on the road and the guided arrow on the center of the driver's field of vision, including the position of arrows. The subjects are assigned to carry out a car simulation test using an eye tracking device. The data was recorded in terms of eye movement and response time from both types of graphics in order to measure the driver's distraction. The results show that though the shape of the graphic has no effect, the location of the arrows does. The guide arrow also did not distract experienced drivers. This study can contribute a guideline for road safety.
Power Management of Extreme-Scale Networks with On/Off Links in Runtime Systems

Networks are among major power consumers in large-scale parallel systems. During execution of common parallel applications, a sizeable fraction of the links in the high-radix interconnects are either never used or are underutilized. We propose a runtime system based adaptive approach to turn off unused links, which has various advantages over the previously proposed hardware and compiler based approaches. We discuss why the runtime system is the best system component to accomplish this task, and test the effectiveness of our approach using real applications (including NAMD, MILC), and application benchmarks (including NAS Parallel Benchmarks, Stencil). These codes are simulated on representative topologies such as 6-D Torus and multilevel directly connected network (similar to IBM PERCS in Power 775 and Dragonfly in Cray Aries). For common applications with near-neighbor communication pattern, our approach can save up to 20% of total machine's power and energy, without any performance penalty.
Ultrasound-Guided Percutaneous Ethanol Injection Protocol to Treat Solid and Mixed Thyroid Nodules

Context Ultrasound (US)-guided percutaneous ethanol injection (PEI) has been proposed for treatment of benign thyroid nodules (TNs). However, there is no consensus for the optimal amount of ethanol injection, number of applications, and time to re-evaluation in order to achieve maximum volume reduction with minimum adverse effects. Objective The purpose of the present study was to analyze the effectiveness of an US-guided PEI protocol to treat solid and mixed TNs based on a new target outcome. Patients and methods We performed a prospective study evaluating the results of PEI in 52 patients with benign solid and mixed TNs. The ethanol dose was fixed in 30% of the nodular volume per session. Patients returned 1 month after each session for US re-evaluation. Therapeutic success was defined as volume reduction of at least 30% associated with disappearance of clinical symptoms and a complete esthetic satisfaction reported by the patient. Results We performed a mean of 2.8 ± 1.9 PEI sessions, with an average total volume of ethanol injected of 9.1 ± 10.3 ml, and a follow-up time of 10.0 ± 8.7 months. There was a reduction of at least 50% of the initial nodular volume in 33 patients (63.5%). In 11 patients (21.2%), the reduction did not reach 50% (mean reduction of 31 ± 11%), but 6 of them reported esthetically satisfactory results and treatment was stopped. Our therapeutic success rate considering the patients with esthetic improvement was 75%. There were no severe complications. Conclusion Our protocol is effective and safe to treat solid and mixed benign TNs based on our established outcome.
Rule-based improvement of maximum likelihood classified LIDAR data fused with co-registered bands

In the past decade, LIght Detection And Ranging (LIDAR) has been recognised by both the commercial and public sector as a reliable and accurate source for land surveying. Object classification in LIDAR data tends towards data fusion by employing additional simultaneously recorded bands. In this paper, a rule-based approach is presented for improving classification accuracy obtained in a supervised classification based on Maximum Likelihood using high resolution LIDAR data, co-registered bands, and further height derived texture features. The issues regarding feature and class selection as well as differentiated accuracy assessment are addressed. The results show that incorporating additional knowledge and considering relationship among classes is beneficial for improving classification accuracy in fused LIDAR data sets.
Branch-Explore-Merge : Facilitating Real-Time Revision Control in Co-Located Collaborative Visual Exploration

Collaborative work is characterized by participants seamlessly transitioning from working together (coupled) to working alone (decoupled). Groupware should therefore facilitate smoothly varying coupling throughout the entire collaborative session. Towards achieving such transitions for collaborative exploration and search, we propose a protocol based on managing revisions for each collaborator exploring a dataset. The protocol allows participants to diverge from the shared analysis path (branch), study the data independently (explore), and then contribute back their findings onto the shared display (merge). We apply this concept to collaborative search in multidimensional data, and propose an implementation where the public view is a tabletop display and the private views are embedded in handheld tablets. We then use this implementation to perform a qualitative user study involving a real estate dataset. Results show that participants leverage the BEM protocol, spend significant time using their private views (40% to 80% of total task time), and apply public view changes for consultation with collaborators. Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. ITS’12, November 11–14, 2012, Cambridge, Massachusetts, USA. Copyright 2012 ACM 978-1-4503-1209-7/12/11. $15.00. ACM Classification: H.5. 2 [Information Interfaces and Presentation]: User Interfaces—Interaction styles
A revisão sistemática de literatura como ferramenta de incentivo a iniciação à pesquisa em gestão ambiental: um relato de experiência / The systematic review of literature as a tool to estimulate the research learning in environmental management: an experience report

Resumo : O trabalho teve como objetivo relatar a experiencia dos alunos do 5° periodo do Curso de Tecnologia em Gestao Ambiental do IFNMG – Campus Aracuai em elaborar artigos cientificos de revisao sistematica de literatura, que e uma investigacao de cunho cientifico, e, consequentemente, apresenta-los em formato de posteres. Esta apresentacao ocorreu na I Mostra de Artigos Cientificos da Gestao Ambiental que foi idealizada e organizada como parte das exigencias da disciplina de Metodologia Cientifica. Os posteres foram organizados lado a lado no corredor do IFNMG onde cada autor se posicionou ao lado de seu trabalho para explicacoes. Para cada um foram disponibilizados cinco minutos para apresentacao e vinte minutos para as explanacoes dos pareceristas que avaliaram a apresentacao seguindo um modelo de barema criado para a ocasiao. Ao final das avaliacoes, a menor media foi de 74,21%, o que demonstra que os trabalhos apresentados tiveram qualidade cientifica. A vivencia dos discentes configurou-se como nova forma de trilhar novos caminhos para renovar o processo educativo da gestao ambiental. Abstract: This paper aims to report an experience of the students from the 5th period of the Technological Course in Environmental Management of the IFNMG - Campus Aracuai to elaborate scientific articles of systematic literature review. This research of a centific nature was later displayed in format of poster by students. This presentation was part of the 1 st Scientific Articles’ Show of Environmental Management that was idealized and organized as part of the requirements for scientific methodology classes. The posters were organized side by side in the IFNMG corridor where each author stands next to their work for public elucidations. Each of them had five minutes for presentation and twenty minutes for the elucidations of reviewers that evaluate the presentation following a model of barema. At the end of the analysis, the lowest average was 74.21%, which shows that the work was of scientific quality. The experience of the speeches was set up as a new way of finding new paths to renew the educational process of environmental management
Lip-motion events analysis and lip segmentation using optical flow

We propose an algorithm for detecting the mouth events of opening and closing. Our method is translation and rotation invariant, works at very fast speeds, and does not require segmented lips. The approach is based on a recently developed optical flow algorithm that handles the motion of linear structure in a stable and consistent way. Furthermore, we provide a semi-automatic tool for generating groundtruth segmentation of video data, also based on the optical flow algorithm used for tracking keypoints at faster than 200 frames/second. We provide groundtruth for 50 sessions of speech of the XM2VTS database [16] available for download, and the means to segment further sessions at a relatively small amount of user interaction. We use the generated groundtruth to test the proposed algorithm for detecting events, and show it to yield promising result. The semi-automatic tool will be a useful resource for researchers in need of groundtruth segmentation from video for the XM2VTS database and others.
$\ell_1$ Regularized Gradient Temporal-Difference Learning

In this paper, we study the Temporal Difference (TD) learning with linear value function approximation. It is well known that most TD learning algorithms are unstable with linear function approximation and off-policy learning. Recent development of Gradient TD (GTD) algorithms has addressed this problem successfully. However, the success of GTD algorithms requires a set of well chosen features, which are not always available. When the number of features is huge, the GTD algorithms might face the problem of overfitting and being computationally expensive. To cope with this difficulty, regularization techniques, in particular $\ell_1$ regularization, have attracted significant attentions in developing TD learning algorithms. The present work combines the GTD algorithms with $\ell_1$ regularization. We propose a family of $\ell_1$ regularized GTD algorithms, which employ the well known soft thresholding operator. We investigate convergence properties of the proposed algorithms, and depict their performance with several numerical experiments.
A Convergent Finite Volume Scheme for Diffusion on Evolving Surfaces

A finite volume scheme for transport and diffusion problems on evolving hypersurfaces is discussed. The underlying motion is assumed to be described by a fixed, not necessarily normal, velocity field. The ingredients of the numerical method are an approximation of the family of surfaces by a family of interpolating simplicial meshes, where grid vertices move on motion trajectories, a consistent finite volume discretization of the induced transport on the simplices, and a proper incorporation of a diffusive flux balance at simplicial faces. The semi-implicit scheme is derived via a discretization of the underlying conservation law, and discrete counterparts of continuous a priori estimates in this geometric setup are proved. The continuous solution on the continuous family of evolving surfaces is compared to the finite volume solution on the discrete sequence of simplicial surfaces, and convergence of the family of discrete solutions on successively refined meshes is proved under suitable assumptions on the geometry and the discrete meshes. Furthermore, numerical results show remarkable aspects of transport and diffusion phenomena on evolving surfaces and experimentally reflect the established convergence results. Finally, we discuss how to combine the presented scheme with a corresponding finite volume scheme for advective transport on the surface via an operator splitting and present some applications.