Search results for "LIMIT"
showing 10 items of 2826 documents
A fiber-based limiter at 170 Gbit/s for all-optical regeneration
2009
We report the numerical and experimental studies of a spectrally filtered fiber-based optical limiter at 170 Gbit/s. The device, including less than 1 km-long of highly nonlinear optical fiber and a 3 nm-width filter, exhibits good performance at an average input power of 14.5 dBm. No power penalty has been observed and a strong robustness against optical noise has been demonstrated.
Optical spectra beyond the amplifier bandwidth limitation in dispersion-managed mode-locked fiber lasers
2011
We investigate the intracavity pulse dynamics inside dispersionmanaged mode-locked fiber lasers, and show numerically that for a relatively wide range of parameters, pulse compression dynamics in the passive anomalous fiber can be accompanied by a significant enhancement of the spectral width by a factor close to 3. Varying the average cavity dispersion also reveals chaotic dynamics for certain dispersion ranges. The impact of the implementation of an optical output port to tap optimal pulse features is discussed. © 2011 Optical Society of America.
À la recherche des maillages communaux d'antan. Présentation du projet ANR COMMUNES et de quelques résultats préliminaires
2020
The COMMUNES project aims: 1) to produce the first H-GIS in the world providing annualised boundary data for all French municipalities from the Revolution to the present day. Each spatial unit will include population data and metrics of access to networks of transport; 2) to develop a multimodal model of transport to allow the dynamic analysis of the relationship between economic and demographic changes and accessibility from the end of the 18th century to the present day; 3) to represent and analyse on a very fine scale some key demographic and socio-economic phenomena. Our method for reconstructing historic administrative boundaries combines the study of historical and cartographic source…
Qualification Conditions for Calculus Rules of Coderivatives of Multivalued Mappings
1998
AbstractThis paper establishes by a general approach a full calculus for the limiting Fréchet and the approximate coderivatives of multivalued mappings. This approach allows us to produce several new verifiable qualification conditions for such calculus rules.
Mobility decline in old age.
2012
Mobility is important for community independence. With increasing age, underlying pathologies, genetic vulnerabilities, physiological and sensory impairments, and environmental barriers increase the risk for mobility decline. Understanding how mobility declines is paramount to finding ways to promote mobility in old age. peerReviewed
Contribution of musculoskeletal pain to postural balance in community-dwelling people aged 75 years and older.
2010
Background. Balance is among the most important prerequisites for safe and independent mobility. Whether musculoskeletal pain is related to standing balance impairment has received limited attention. The aim of this study was to examine the association of musculoskeletal pain with the control of balance in older people. Methods. A total of 605 participants aged 75 years and older (mean age 80.4, 71 % women) were interviewed about presence and severity of musculoskeletal pain. Balance was measured by a force platform, and impaired balance was defined as a high sway velocity moment or inability to maintain semitandem standing. Results. Musculoskeletal pain was reported by 48% of the participa…
Thermal Parametric and Thermo-Mechanical analyses for the Limiter Blanket Module of ITER
1996
Stability limits of elemental 2D metals in graphene pores
2019
Two-dimensional (2D) materials can be used as stabilizing templates for exotic nanostructures, including pore-stabilized, free-standing patches of elemental metal monolayers. Although these patches represent metal clusters under extreme conditions and are thus bound for investigations, they are poorly understood as their energetic stability trends and the most promising elements remain unknown. Here, using density-functional theory simulations and liquid drop model to explore the properties of 45 elemental metal candidates, we identify metals that enable the largest and most stable patches. Simulations show that pores can stabilize patches up to $\sim 8$ nm$^2$ areas and that the most promi…
The Role of Productivity in Increasing Latvian Competitiveness
2018
Productivity is the main key factor for Latvia to increased prosperity, ensuring efficient use of resources. Due to limited availability of resources and the increasing competition in the global markets, it is important for Latvia to support its economic growth through increased productivity.