149 research outputs found
Investigating the correspondence between driver head position and glance location
No full textThe relationship between a driver’s glance orientation and corresponding head rotation is highly complex due to its nonlinear dependence on the individual, task, and driving context. This paper presents expanded analytic detail and findings from an effort that explored the ability of head pose to serve as an estimator for driver gaze by connecting head rotation data with manually coded gaze region data using both a statistical analysis approach and a predictive (i.e., machine learning) approach. For the latter, classification accuracy increased as visual angles between two glance locations increased. In other words, the greater the shift in gaze, the higher the accuracy of classification. This is an intuitive but important concept that we make explicit through our analysis. The highest accuracy achieved was 83% using the method of Hidden Markov Models (HMM) for the binary gaze classification problem of (a) glances to the forward roadway versus (b) glances to the center stack. Results suggest that although there are individual differences in head-glance correspondence while driving, classifier models based on head-rotation data may be robust to these differences and therefore can serve as reasonable estimators for glance location. The results suggest that driver head pose can be used as a surrogate for eye gaze in several key conditions including the identification of high-eccentricity glances. Inexpensive driver head pose tracking may be a key element in detection systems developed to mitigate driver distraction and inattention
Baryon asymmetry from the generalized uncertainty principle
No full textThe unexplained observed baryon asymmetry in the Universe is a long-standing problem in physics, with no satisfactory resolution so far. To explain this asymmetry, three Sakharov conditions must be met. An interaction term which couples space-time and the baryon current is considered, which satisfies the first two Sakharov conditions. Furthermore, it is shown that the Generalized Uncertainty Principle (GUP) from quantum gravity induces corrections to the Friedmann equations in cosmology, via the holographic principle. GUP also induces variations of energy and pressure density in the radiation dominated era, which satisfies the third Sakharov condition. Therefore, this construction provides a viable explanation for the observed baryon asymmetry. This also fixes the GUP parameters to alpha(0) approximate to 10(4) and beta(0) approximate to -10(8). (C) 2021 The Author(s). Published by Elsevier B.V
-
No full textEsta dissertação trata das descobertas sonoras advindas da relação entre humano e matéria em uma intenção musical que parte da percussão. Pesquisamos o uso musical percussivo de variados objetos do cotidiano e materiais naturais como água, pedras, folhas, frutas, madeiras, bambus em contextos culturais e em práticas artísticas de grupos e artistas em diversos lugres do mundo: Brasil, Venezuela, Camarões, República Democrática do Congo, Espanha, Itália, Vanuatu e Ilhas Salomão. Através do levantamento dessas práticas culturais e artísticas, compreende-se que há tempos, e em lugares distintos do planeta, o ser humano expressa suas musicalidades com o que se tem à disposição em seu entorno de variadas formas, tornando instrumento o que originalmente possuía outra função o que chamamos neste trabalho por objetos percussivos. Além desse levantamento, fazemos um aprofundamento na prática pedagógica da oficina Percussão, Descoberta e Criação, ministrada pelo autor desta dissertação. Esta abordagem pedagógica visa aproximar a música da vida das pessoas e trazer à tona as potencialidades musicais, criativas, sociais, políticas e ambientais da criação e educação musical com esses objetos. Do ponto de vista da fundamentação teórica, o pensamento filosófico de Gaston Bachelard (1948), em confluência com os antropólogos Daniel Miller (2013) e Bruno Latour (2007), nos auxiliam no entendimento acerca das relações humano-matéria e dialogam com os pensamentos musicais de Pierre Schaeffer (1966), Murray Schafer (2011, 2013), Teca Alencar de Brito (2003, 2007, 2019), Ari Colares (2018), Ana Fridman (2013, 2015, 2016), Rogério Costa (2008), Consiglia Latorre (2014) e Fátima Carneiro dos Santos (2006), e com a ideia de fluxo criativo do psicólogo Mihaly Csikszentmihalyi (1999). Com esse caminho, buscamos mostrar a relevância desta temática para a educação musical, para as artes e para a pesquisa acadêmica, e contribuir com a ampliação das possibilidades musicais nessas áreas.This dissertation deals with sound discoveries arising from the relationship between human and matter in a musical intention that starts from percussion. We researched the percussive musical use of various everyday objects and natural materials such as water, stones, leaves, fruits, wood, bamboo in cultural contexts and in artistic practices of groups and artists in different parts of the world: Brazil, Venezuela, Cameroon, Democratic Republic of Congo, Spain, Italy, Vanuatu and Solomon Islands. By surveying these cultural and artistic practices, it is understood that for a long time, and in different places on the planet, human beings have expressed their musicality with what is available in their surroundings in various ways, turning into an instrument what originally had another function what we call percussive objects in this work. In addition to this survey, we deepen the pedagogical practice of the Percussion, Discovery and Creation workshop, taught by the author of this dissertation. This pedagogical approach aims to bring music closer to people\'s lives and bring to light the musical, creative, social, political and environmental potential of musical creation and education with these objects. From the point of view of theoretical foundation, the philosophical thought of Gaston Bachelard (1948), in confluence with the anthropologists Daniel Miller (2013) and Bruno Latour (2007), help us to understand the human-matter relations and dialogue with the musical thoughts of Pierre Schaeffer (1966), Murray Schafer (2011, 2013), Teca Alencar de Brito (2003, 2007, 2019), Ari Colares (2018), Ana Fridman (2013, 2015, 2016), Rogério Costa (2008), Consiglia Latorre (2014) and Fátima Carneiro dos Santos (2006), and with the idea of creative flow by psychologist Mihaly Csikszentmihalyi (1999). With this path, we seek to show the relevance of this theme for music education, for the arts and for academic research, and to contribute to the expansion of musical possibilities in these areas
A small-gain-theorem-like approach to nonlinear observability via finite capacity channels
No full textThe paper is concerned with observation of discrete-time, nonlinear, deterministic, and maybe chaotic systems via communication channels with finite data rates, with a focus on minimum data-rates needed for various types of observability. With the objective of developing tractable techniques to estimate these rates, the paper discloses benefits from regard to the operational structure of the system in the case where the system is representable as a feedback interconnection of two subsystems with inputs and outputs. To this end, a novel estimation method is elaborated, which is alike in flavor to the celebrated small gain theorem on input-to-output stability. The utility of this approach is demonstrated for general nonlinear time-delay systems by rigorously justifying an experimentally discovered phenomenon: Their topological entropy stays bounded as the delay grows without limits. This is extended on the studied observability rates and appended by constructive finite upper bounds independent of the delay. It is shown that these bounds are asymptotically tight for a time-delay analog of the bouncing ball dynamics. Team Tamas Keviczk
On adaptive sliding mode control without a priori bounded uncertainty
No full textAdaptive Sliding Mode Control (ASMC) aims to adapt the switching gain in such a way to cope with possibly unknown uncertainty. In state-of-the-art ASMC methods, a priori boundedness of the uncertainty is crucial to ensure boundedness for the switching gain and uniformly ultimately boundedness. A priori bounded uncertainty might impose a priori bounds on the system state before obtaining closed-loop stability. A design removing this assumption is still missing in literature. A positive answer to this quest is given by this note where a novel ASMC methodology is proposed which does not require a priori bounded uncertainty. An illustrative example is presented to highlight the main features of the approach, after which a general class of Euler–Lagrange systems is taken as a case study to show the applicability of the proposed design.Accepted Author ManuscriptShip Design, Production and OperationsTeam Bart De Schutte
Gift-Giving, Disreputable Exchange, and the Management of Donations in a Police Department
No full text
Robust optimal power control for ad hoc networks
No full textIn this paper we apply robust optimization techniques to the problem of power control in mobile ad hoc wireless networks. Our approach is inherently multi-objective in that we seek a solution set that trades off the dual objectives of achieving optimality and maintaining feasibility. In particular, our objective is to minimize the aggregate power employed by the transmitters and the constraints are that the SINR at each receiver must exceed the threshold required for successful reception. The selection of the powers is complicated, however, by the fact that the channels incorporate random and unknown fading and attenuation components. A robust optimization framework for this problem is developed that penalizes the expected infeasibility of the proposed solution. The "cost of uncertainty" is measured by the total additional power required when all channel states are known. Our results demonstrate that communication dependability is enhanced through the robust formulation
Artis perspectiuae plurium generum elegantissimae formulae [graphic], multigenis fontibus, nonnullisq[ue] hortulis affabre factis exornatae, in cõmodum artificum, eorumq[ue] qui architectura, aedificiorumq[ue] cõmensurata uarietate delectantur, antea nunquam impressae,
No full textAt head of title: Ioannes à Duetecum, Lucas à Duetecum fecerunt.Added title in German: Vilerleij kunstliche Stuck der edlen Perspectiue, sampt mehrerleij Wasserbrunnen vnd etlichen Lustgärten gantz wercklich gezieret, allen kunst-liebenden Werckleuten vnd Liebhabern der Architectur vnd Bawmeijstereij fast nutzlich. Vor nie in Truck auszgangen. Newlich erdacht vnd ordonnirt durch Hans Fridman Friesz.Mode of access: Internet.Binding: modern decorated paper. Author written on spine label
Quantum Meruit
No full textThis article analyzes the theoretical and practical differences between contractual and restitutionary quantum meruit Instances of quasi-contractual meruit are also considered. The author explores the evolution and historical foundations for these various claims. While claims for restitutionary quantum meruit are well established today, the scope and range of relief as -well as the theoretical basis upon which these claims are invoked, remain undecided. Factors for a successful claim of restitutionary quantum meruit include the intention to be compensated or reimbursed, having not acted gratuitously, and the existence of a special relationship. While recovery was thought to be dependent on whether the defendant receives a benefit, the author explains that this is not always crucial. An examination of Justice judgment in the Peel case concludes the author\u27s article
- …
