218,421 research outputs found
Low noise high performance 50nm T-gate metamorphic HEMT with cut-off frequency f<sub>T</sub> of 440 GHz for millimeterwave imaging receivers applications
No full textThe 50 nm m-HEMT exhibits extremely high f<sub>T</sub>, of 440GHz, low F<sub>min</sub> of 0.7 dB, associated gain of 13 dB at 26 GHz with an exceptionally high Id of 200 mA/mm and gm of 950 ms/mm at low noise biased point
Immunoprophylaxie des cancers colorectaux par des glucides indigestibles fermentables : études chez la souris Min
No full textCertaines fibres alimentaires réduiraient l'apparition des cancers colorectaux mais l'hypothèse reste controversée. Un des mécanismes fait intervenir la production par fermentation de butyrate. Nous avons testé deux fibres butyrogènes chimiquement différentes (fructo-oligosaccharides à chaîne courte scFOS, et amidon résistant) versus une fibre faiblement productrice de butyrate (son de blé désamidonné) chez la souris Min, un modèle de carcinogenèse intestinale spontanée. Seul le régime scFOS réduisait le nombre de tumeurs coliques et stimulait l'immunité locale. La nature chimique de la fibre ou bien les propriétés prébiotiques des scFOS (ils favorisent la croissance de bactéries lactiques qui agiraient sur la réaction immunitaire) sont donc impliquées. Deux autres types d'amidons résistants réduisaient le nombre de petites tumeurs. L'addition de bifidobactéries à l'un de ces deux régimes réduisait le nombre de petites tumeurs, mais augmentait celui de grosses tumeurs illustrant le concept de modulation par l'immunogénicité de la dualité immunofacilitation surveillance. La déplétion en lymphocytes T associée au régime scFOS doublait le nombre de tumeurs par rapport aux
souris immunocompétentes. Le régime scFOS diminuait l'expression du récepteur à l'IL2 à la surface des lymphocytes intra-épithéliaux (LIE) suggérant la mise en anergie temporaire du système immunitaire, mais pouvant aussi signifier l'implication d'une autre voie d'activation des LIE. Enfin, pour mettre en place une modélisation des intéractions lympho-épithéliales, nous avons croisé des
souris C57BL6 et Min avec la souris transgénique Immortomouse et isolé à partir de primo-cultures
de muqueuses des lignées cellulaires conditionnellement immortalisées saines et mutées sur Apc. Ce modèle permettra d'étudier en co-culture sur filtre, l'influence des glucides indigestibles et de leurs produits de fermentation sur les interactions lympho-épithéliales au cours de la carcinogenèse
Letter, [Author unclear] to Paulina T. Merritt
No full textHandwritten letter to Paulina Merritt from an unknown author, October 1, 1876.
Exploration in stochastic algorithms: An application on MAX-MIN Ant System
No full textIn this paper a definition of the exploration performed by stochastic algorithms is proposed. It is based on the observation through cluster analysis of the solutions generated during a run. The probabilities associated by an algorithm to solution components are considered. Moreover, a consequent method for quantifying the exploration is provided. Such a measurement is applied to MAX-MIN Ant System. The results of the experimental analysis allow to observe the impact of the parameters of the algorithm on the exploration.exploration, cluster analysis, MAX-MIN Ant System
Energy Crop Supply in France: A Min-Max Regret Approach
No full textThis paper attempts to estimate energy crop supply using an LP model comprising hundreds of representative farms of the arable cropping sector in France. In order to enhance the predictive ability of such a model and to provide an analytical tool useful to policy makers, interval linear programming (ILP) is used to formalise bounded rationality conditions. In the presence of uncertainty related to yields and prices it is assumed that the farmer minimises the distance from optimality once uncertainty resolves introducing an alternative criterion to the classic profit maximisation rationale. Model validation based on observed activity levels suggests that about 40% of the farms adopt the min-max regret criterion. Then energy crop supply curves, generated by the min-max regret model, are proved to be upward sloped alike classic LP supply curves.interval linear programming, min-max regret, energy crops, France, Crop Production/Industries, Resource /Energy Economics and Policy, C61, D81, Q18,
Fuzzy Data Processing Beyond Min t-Norm
No full textUsual algorithms for fuzzy data processing -- based on the usual form of Zadeh\u27s extension principle -- implicitly assume that we use the min and -operation (t-norm). It is known, however, that in many practical situations, other t-norms more adequately describe human reasoning. It is therefore desirable to extend the usual algorithms to situations when we use t-norms different from min. Such an extension is provided in this paper
The geometry (A) and the activity distribution within the Revolver insert at (B) t = 0min, (C) t = 45 min, and (D) t = 80 min.
No full textThe geometry (A) and the activity distribution within the Revolver insert at (B) t = 0min, (C) t = 45 min, and (D) t = 80 min.</p
Delay-guaranteed energy saving algorithm for the delay-sensitive applications in IEEE 802.16e systems 1339
No full textThe 802.16e power management helps to increase the lifetime of Mobile Subscriber Stations (MSSs) by reducing their energy consumption, but this reduction results in Medium Access Control (MAC) Service Data Unit (SDU) response delay. Hence, both energy consumption and MAC SDU response delay are important performance metrics; however, they have a trade-off relationship. To guarantee the delay constraints of delay-sensitive applications, operating parameters in sleep-mode operation such as minimum sleep interval, T-min and maximum sleep interval, T-max, should be considered seriously. Especially, large T-max results in high MAC SDU response delay. However, in the IEEE 802.16e standard, this point is not given enough attention. In this paper, we first propose a numerical model to determine T-max based on MAC SDU response delay. Then, we propose a Delay -Guaranteed Energy Saving (DGES) algorithm to minimize energy consumption with a given MAC SDU response delay by finding the optimal T-max under a fixed T-min. Our proposed numerical model and DGES algorithm are verified by simulation results(1).This work was supported in part by the Korea Science and Engineering
Foundation (KOSEF) grant funded by the Korea government (MOST) (No.
R11-2000-074-01001-0) and MIC, Korea under the ITRC program (C-1090-
0603-0036) supervised by IITA
- …
