Search results for "environnemen"
showing 10 items of 328 documents
Agroecological engineering
2015
Earth has recently entered the new era of the Anthropocene, during which the rise of human activities are impacting for the first time ecosystems and climate on the global scale. Since the 1960s the green revolution has improved food production in quantity using industrially-designed agriculture, which has led to global pollution by pesticides and losses of food quality, biodiversity and soil carbon. As a consequence there is a need to implement agroecological practices in order to produce food safely and in a sustainable way. This virtual issue presents principles and applications of agroecological engineering, exemplified in 19 selected review articles from the journal Agronomy for Sustai…
Handover management in heterogenous mobile and wireless networks
2015
Since 1990, networking and mobile technologies have made a phenomenal unprecedented progress. This progress has been experienced on multiple fronts in parallel; especially on the application level and the user's needs one. This rapid evolution of the technology imposed a need for the existence of heterogeneous environments where the coverage is ensured throughout the different available networks. The challenge with such architecture would be to provide the user with the ability to navigate through the different available networks in a transparent and seamless fashion. However, the navigation among different types of networks is commonly referred to as vertical Handover. The IEEE 802.21 stan…
Worldwide Diffusion of ISO 14001 Standard
2008
We conduct an empirical examination of national conditions that promote the diffusion of the ISO 14001 standard. Our estimates confirm earlier studies on several determinants. While environmental considerations are important in the diffusion of the ISO 14001 standard, we show that other factors play a significant role as well, such as the prior diffusion of ISO 9000 and the country’s education level. Our main contribution is to provide empirical evidence for the hypothesis that the participation of a country or an economic sector in the standard-setting process is a major driver of its future adoption of the standard.
Theoretical approaches for geometric optimization of urban forms : towards a fractal development of the city
2017
This thesis aims to establish a urban structure that optimizes inhabitant's preferences. In other words, we want to find out which city shape answers the best the residents' aspirations, according to their consumption preferences for urban and green amenities. By considering a theoretical field of study and by characterizing the population by a Cobb-Douglas behavioral pattern, we will build step by step a city, assuming successive arrivais of new individuals, in order to find out which geometric shape gives the most suitable answer. The final goal of this thesis is there to suggest a city with a fractal shape as an appro- priate answer to the resident's expectations. We will show that this …
Impacts interculturels au Néolithique moyen. Du terroir au territoire : sociétés et espaces.
2006
International audience; INTERACTIONS CULTURELLES ET EMPRISE DES SOCIÉTÉS NÉOLITHIQUES SUR LES ESPACES"Interactions culturelles", "espaces", voilà bien des sujets que certains pourraient qualifier de rebattus ! Diverses éditions antérieures du colloque néolithique n'ont-elles pas fait de l'un ou l'autre leur thème central ? Leur choix, pour ce colloque ne relèverait-il alors que d'une soumission aux vogues du moment ? On privilégie en effet volontiers ces derniers temps les débats touchant aux relations interculturelles. Et il paraît de bon ton de sacrifier aux approches spatiales, quand ce n'est pas à leur seul instrument, le "SIG". Mais, au delà de ces considérations un peu simplistes, ce …
Winter long dry spells in the Mediterranean basin and associated atmospheric conditions : contemporary and future variability (1957-2100)
2017
In the context of climate change, as reflected by a dryer Mediterraneanbasin, this thesis focused on the study of the contemporary and future variability(1957-2100) of the wintertime (September to April) very long dryspells events (called VLDSe) in the Mediterranean basin. An original methodologywas developed in this thesis in order to define VLDSe as singularclimatic events, characterized by location, duration and spatial extent criteria.76 VLDSe were detected in the Mediterranean basin on the contemporaryperiod (1957-2013). These events are divided into 4 main geographicalpatterns: North-East, West, Scattered Localized and South-East. North-East and West configurations are associated with…
Vers une tridimensionalité du contrôle interactif
2011
We propose in this paper to revisit the concept of interactive control, highlighted by Robert Simons, examining the use of "environmental control systems" in Ten French Companies proactive in ecology. By showing that interactivity of "control systems" is not limited to a vertical dimension as suggested by Simons, but it tends towards three-dimensional (vertical, transversal and external), this study highlights the interest of explore further upstream the concept of interactive control little studied in the literature.
Influence of interaction techniques o n VIMS in virtual environments : estimation and prediction
2014
Understanding oculo-vestibular dynamics during sensory rearrangement in the central nervous system plays an extremely important role in better understanding human perception, and improves the technology in many engineering fields. Besides, the sensory conflict that occurs between ocular, vestibular and proprioception during sensory rearrangement at certain occasions might adversely affect the user performance in a wide variety of domains including flight/car simulators, scale-one 3D systems, large-scale displays, serious games, and so on. Therefore, knowing the condition in which the sensory conflict happens has a great deal of importance. This study aims at understanding the nature of sens…
"Being Flexible": graduates Facing Changes in Their Work Environment
2011
According to the crucial importance of innovation for modern economies, the role of graduates regarding innovation appears to be a major topic when their performances in the labour market at stake. Five main questions are addressed in this chapter: (1) What does innovation mean? (2) Which organisations are likely to be more innovative? (3) What role do Higher Education graduates play regarding innovation? (4) Are they equipped to do develop innovation? (5) Which are the occupations more related to innovation, and are innovative activities rewarded? The results presented in this chapter confirm that higher education graduates are crucial actors in the innovation process. The jobs of innovati…
Lower Cretaceous formations (Berriasian/Valanginian to Albian) from the East of the Paris Basin: lithostratigraphy and depositional environments.
2023
The Paris Basin is a Meso-Cenozoic intracontinental basin characterised during the Early Cretaceous by a continental evolution. However, in its southeastern part, due to transgressions originating from the Tethys, the Lower Cretaceous continental deposits were occasionally interrupted by the deposition of marine sediments. In this area, the sedimentary succession includes above the Lower Tithonian “Calcaires du Barrois”, the transgressive “Sables de Soulaines” Formation on the Late Jurassic emersion surface. This formation showing facies characteristic of a tidal flat is reputed to be Valanginian in age, but there is no dating element and could as well begin in the Late Berriasian. Above,…