Search results for " phenomenon"

Design of dispersion-managed fiber systems for transmitting chirp-free Gaussian pulses

2008

International audience; We present a general method to analytically design a dispersion-managed (DM) fiber system for any desired fiber (dispersion, nonlinearity and losses) and pulse (width and energy) parameters. This analytical design allows one to transmit chirp-free Gaussian pulses (for very long distances) in almost all kinds of DM fiber systems that have appeared so far in the literature, including systems with dispersion map length greater, equal or shorter with respect to the amplification period.

Qualitative remarks on some non-linear aspects of the radio-pulsar magnetosphere

2011

In the class of the submodels SCLF (space-charge limited flow) of the family of "gap-plus-PPF" models, let us exposes some qualitative remarks on the possible turbulent dynamics showed by the zone (II) (see Fig. 1 of the text) of the acceleration zone of the "direct inner gap". Furthermore, we will discuss some consequent physical implications (as, for instance, self-focussing phenomena, Petviashvili's diamagnetism, and so on) concerning structure and physical phenomenology of the remaining subzones (above the subzone (II)) of the given acceleration zone, in connection with possible models for the external solid crust of the radio-pulsar.

Adaptive interpolation with maximum order close to discontinuities

2022

Abstract Adaptive rational interpolation has been designed in the context of image processing as a new nonlinear technique that avoids the Gibbs phenomenon when we approximate a discontinuous function. In this work, we present a generalization to this method giving explicit expressions for all the weights for any order of the algorithm. It has a similar behavior to weighted essentially non oscillatory (WENO) technique but the design of the weights in this case is more simple. Also, we propose a new way to construct them obtaining the maximum order near the discontinuities. Some experiments are performed to demonstrate our results and to compare them with standard methods.

Groupanalytical studies of mafia phenomenon.

2009

Bilaterale Nierenrindennekrosen im Rahmen eines Sanarelli-Shwartzman-Ph�nomens nach Pneumokokkenmeningitis bei chronisch-essentieller Erythroblastope…

1966

Es wird uber den Verlauf einer chronisch-essentiellen Erythroblastopenie (sog. Blackfan-Diamond-Anamie) bei einem 4 Jahre, 11 Monate alten Madchen berichtet. Dabei erweckten die lange Verlaufsdauer, die Therapie sowie deren Komplikationen besonderes Interesse, wobei wir der interkurrenten Meningokokken-Meningitis sowie der todlichen Pneumokokkenmeningitis in Verbindung mit Anurie, hamorrhagischer Diathese und Kreislaufkollaps besondere Bedeutung beimasen. Pathologisch-anatomisch wurden Organveranderungen gefunden, die sich einem Sanarelli-Shwartzman-Phanomen zuordnen liesen. Dabei standen bilaterale Nierenrindennekrosen, die Verstopfung kleiner Nierenrindengefase sowie der Glomeruluscapilla…

The Warm Water in my Heart - The Meanings of Love among the Finnish Country Population in the Second Half of the 17th Century

2011

This article examines the meanings and contents given to the emotion called love in early modern Finnish culture. The study takes as its starting point three distinct love affairs found in the district court records. These cases violated the boundaries between the estates, for the women were of noble birth and the men came from peasant backgrounds. Historical love is here approached using the theories of Catherine A. Lutz, Carol & Peter Stearns and Barbara Rosenwein. Following these scholars, love is seen as a cultural and social phenomenon, bound up with the culture and mentalities of the era. In early modern times marriage was the basis of society and promoted by both the state and the ch…

Post-Supernatural Cultures: There and Back Again

2020

The abandonment of supernatural religious beliefs and rituals seems to occur quite easily in some contexts, but post-supernaturalist cultures require a specific set of conditions that are difficult to produce and sustain on a large scale and thus are historically rare. Despite the worldwide resurgence of supernaturalist religion, some subcultures reliably produce people who deny the existence of supernatural entities. This social phenomenon has evoked competing explanations, many of which enjoy empirical support. We synthesize six of the most influential social-science explanations, demonstrating that they provide complementary perspectives on a complex causal architecture. We incorporate t…

Hysteresis and frequency tunability of gyrotrons

2015

We present the first devoted experimental and theoretical study of hysteresis phenomenon in relation to frequency tunability of gyrotrons.

Un/doing calculation: on knowledge practices of risk management

2011

From small enterprises all the way up to financial markets, economic calculation is an activity routinely conducted in economic life-worlds. This paper argues that calculation is situated in the practice of participants involved in these life-worlds as well as in the technological tools they use. It champions a sociological analysis of the world-constituting character of calculation. As empirical examples the paper discusses risk management strategies, the embeddedness of calculation practices in banking infrastructure, and the process of internal rating procedures. Contesting the idea of the omnipresence of calculation, the paper analyzes the social phenomenon of the neutralization of calc…

Introduction: The Late Chalcolithic of Northern Mesopotamia in Context. Building on a Long and Eventful Debate

2022

Many of the debates that have until recently driven research into Mesopotamia’s proto-urban phase (5th– 4th millennia BCE) have now been reassessed thanks to new fieldwork in Iraqi Kurdistan and new data into the relationships between the north and south of the Alluvium from hitherto poorly-documented regions. These debates were re-examined in the light of this new material during a workshop held at the ICAANE in 2018 in Munich, leading to unprecedented perspectives on the patterns of early urbanization, social mobility, and the organization of Late Chalcolithic communities. Drawing on research first presented at ICAANE, and building on the most recent data from surveys and excavations, thi…