The Velocity of the Propagating Wave for General Coupled Scalar Systems

We consider spatially coupled systems governed by a set of scalar density evolution equations. Such equations track the behavior of message-passing algorithms used, for example, in coding, sparse sensing, or constraint-satisfaction problems. Assuming that the "profile" describing the average state of the algorithm exhibits a solitonic wave-like behavior after initial transient iterations, we derive a formula for the propagation velocity of the wave. We illustrate the formula with two applications, namely Generalized LDPC codes and compressive sensing.Comment: 5 pages, 5 figures, submitted to the Information Theory Workshop (ITW) 2016 in Cambridge, U

A layered fuzzy logic controller for nonholonomic car-like robot

A system for real time navigation of a nonholonomic car-like robot in a dynamic environment consists of two layers is described: a Sugeno-type fuzzy motion planner; and a modified proportional navigation based fuzzy controller. The system philosophy is inspired by human routing when moving between obstacles based on visual information including right and left views to identify the next step to the goal. A Sugeno-type fuzzy motion planner of four inputs one output is introduced to give a clear direction to the robot controller. The second stage is a modified proportional navigation based fuzzy controller based on the proportional navigation guidance law and able to optimize the robot's behavior in real time, i.e. to avoid stationary and moving obstacles in its local environment obeying kinematics constraints. The system has an intelligent combination of two behaviors to cope with obstacle avoidance as well as approaching a target using a proportional navigation path. The system was simulated and tested on different environments with various obstacle distributions. The simulation reveals that the system gives good results for various simple environments

Packaging of RF Mems Switching Functions on Alumina Substrate

Recently the strong demands in wireless communication requires expanding development for the application of RF MEMS (Radio Frequency micro electro mechanical systems) sensing devices such as micro-switches, tunable capacitors because it offers lower power consumption, lower losses, higher linearity and higher Q factors compared with conventional communications components. To accelerate commercialisation of RF MEMS products, development for packaging technologies is one of the most critical issues should be solved beforehand.Comment: Submitted on behalf of TIMA Editions (http://irevues.inist.fr/tima-editions

Editorial

كلمة العدد (الإنجليزي)Editorial in Englis

Educating interior design & architecture clients about sustainable design : issues, perceptions, and expectations

Cette recherche explore les obstacles qui interdisent le succès des projets de conception durable. L'étude explore les problèmes qui empêchent la mise en oeuvre durable des projets à partir des perspectives d'éducateurs et de professionnels expérimentés. L'examen de certifications privées et de systèmes visant à certifier la durabilité dans l'industrie du design a été présenté dans cette recherche. La collecte de données comprenait des études de cas en général, des entretiens avec des éducateurs expérimentés et des professionnels et deux études de cas détaillées qui servaient d'exemples réussis d'adaptation dans un procès pour une meilleure mise en oeuvre de projets durables, à Beyrouth et à Montréal. Les études des cas situés à Montréal, Canada et Beyrouth, Liban sont mises en avant. L'approche méthodologique interprétative a été utilisée pour analyser les données fournies par les participants à l'entrevue et deux études de cas réussies. L'éducation du client d'architecture a été la cible principale de cette recherche en reconnaissant l'importance du contexte social lors de la planification d'un projet durable. La discussion finale a présenté une nouvelle évaluation du processus de design qui permettra de mieux évaluer le processus de design environnemental. Les résultats sont présentés dans une discussion qui a réévalué le processus de design pour former une idée précise des potentiels durables trouvés à la fois à Beyrouth, Liban et à Montréal, au Canada. La discussion finale présente de la perspective émergente de la façon dont un processus de design durable peut conduire à une meilleure évaluation du processus de design environnemental.This research explores the barriers that prohibit the success of a sustainable design project. The study explores what issues prevent sustainable project implementation from the perspectives of experienced educators and professionals. Different approaches are examined in the implementation phase. The literature review included the examination of private certifications and systems that provide sustainable certifications in the design industry. Data collection included case studies as a general view, interviews with experienced educators and professionals, and the examination of two detailed case studies. Case studies are examined in Beirut, Lebanon and Montreal, Canada, along with other practices found with a better implementation of sustainable projects. The methodological approach includes exploratory interviews and interpretive analytic methods to analyze the data provided by the interview participants, as well as a comparison between two case studies in sustainable development. Educating the client was the primary target of this research alongside acknowledging the importance of social context when approaching a sustainable design project. Findings are presented in a discussion considering a re-evaluation of the design process to form a precise idea of the sustainable potential that might be found in Beirut, Lebanon and Montreal, Canada. The final discussion presents emergent perspectives of how a sustainable design process can lead to a better evaluation of environmental design