676 research outputs found
A study of the dual problem of the one-dimensional L-infinity optimal transport problem with applications
The Monge-Kantorovich problem for the infinite Wasserstein distance presents
several peculiarities. Among them the lack of convexity and then of a direct
duality. We study in dimension 1 the dual problem introduced by Barron, Bocea
and Jensen. We construct a couple of Kantorovich potentials which is "as less
trivial as possible". More precisely, we build a potential which is non
constant around any point that the plan which is locally optimal moves at
maximal distance. As an application, we show that the set of points which are
displaced to maximal distance by a locally optimal transport plan is minimal
The Monge problem with vanishing gradient penalization: Vortices and asymptotic profile
We investigate the approximation of the Monge problem (minimizing
\int\_ |T (x) -- x| d(x) among the vector-valued maps T with
prescribed image measure T \# ) by adding a vanishing Dirichlet energy,
namely \int\_ |DT |^2. We study the -convergence as
0, proving a density result for Sobolev (or Lipschitz)
transport maps in the class of transport plans. In a certain two-dimensional
framework that we analyze in details, when no optimal plan is induced by an H
^1 map, we study the selected limit map, which is a new "special" Monge
transport, possibly different from the monotone one, and we find the precise
asymptotics of the optimal cost depending on , where the leading term
is of order | log |
Katse taululle : Opas koululaisen nÀönseulonnasta Oulun seudun kouluterveydenhoitajille
Koululaisella on useita työkaluja kÀytössÀÀn liittyen koulumenestykseensÀ. NÀistÀ työkaluista nÀkökyky on yksi tÀrkeimmistÀ. Kouluissa tehtÀvÀt nÀköseulat ovat erittÀin hyödyllinen keino kouluikÀisten lasten nÀköongelmien tunnistamisessa. Koulujen nÀköseulojen avulla ongelmat voidaan tunnistaa ajoissa ja hoitaa riittÀvÀn aikaisessa vaiheessa.
Toteutimme opinnÀytetyönÀmme projektin, jonka tavoitteena oli tuottaa opas Oulun seudun kouluterveydenhoitajille nÀönseulontojen tueksi. Oppaan tarkoituksena oli helpottaa ja nopeuttaa nÀönseulontojen tekemistÀ sekÀ avata nÀönseulonnan kÀytÀnteitÀ ja toimintatapoja. Opas toteutettiin yhteistyössÀ Oulun kaupungin terveyspalvelujen kanssa. Oppaan ensimmÀinen kokonaisuus sisÀltÀÀ teoriaa koululaisen nÀkemiseen liittyvistÀ perustermeistÀ. Toisena kokonaisuutena oppaassa kÀsitellÀÀn nÀönseulonnan eri vaiheet sekÀ jatkotutkimuksiin lÀhettÀmisen perusteet.
Opas esiteltiin kouluterveydenhoitajille Oulun kaupungin jÀrjestÀmÀn koulutuspÀivÀn yhteydessÀ. Oppaan laatua arvioitiin esitestauspalautteen sekÀ suullisen palautteen avulla. Saamamme palaute oli positiivista koskien rakennetta, ulkoasua ja sisÀltöÀ. Suurin osa esitestaajista koki oppaan hyödylliseksi ja uskoi kÀyttÀvÀnsÀ opasta työssÀÀn. Opas on toimitettu Oulun seudun kouluterveydenhoitajien kÀyttöön sÀhköpostilla ja heillÀ on myös mahdollisuus ladata se kÀyttöönsÀ Oulun kaupungin sisÀisestÀ verkosta.Academic achievement among school aged children depends on many different factors. One important factor is good eyesight. School-based vision screening can help identify vision problems. Early detection and treatment are vital to prevent problems such as poor school success.
The aim was to design and produce a guide concerning school-based vision screening for public health nurses in the city of Oulu. The purpose was also to improve the reliability and uniformity in the practices concerning the vision screenings in the city of Oulu.
The guide includes specific instructions how to conduct vision screening in primary and secondary schools. It also includes useful terminology and information about refractive errors among school aged children. The guide was launched on an education day. Public health nurses working in schools in the city of Oulu were sent the guide by e-mail. The guide is also available in the intranet of the city of Oulu. Before the guide was launched we collected feedback from five public health nurses regarding the layout and the content of the guide.
The feedback was mainly positive and majority of the informants regarded the guide as useful for their future vision screenings. The informants thought that the guide was easy to use and the content was clear and logical. The beneficiaries of the guide are mainly the public health nurses but also school aged children benefit from reliably conducted vision screening
A sharp inequality for transport maps in W^{1,p}(R) via approximation
For convex and increasing, we prove the inequality , every time that is a Sobolev function of one variable and
is the non-decreasing map defined on the same interval with the same image
measure as , and the function takes into account the number of
pre-images of at each point. This may be applied to some variational
problems in a mass-transport framework or under volume constraints
ENVISAT ASAR
This document is a series of viewgraphs on the Envisat advanced synthetic aperture radar (ASAR). Viewgraphs cover mission objectives, modes of operation, instrument parameters, a comparison with the European Remote Sensing Satellite (ERS-1) active microwave instrument (AMI), instrument design, transmit/receive module and antenna tile specifications, data rates, swath coverage, and ASAR program schedule
Large-scale Spatial Distribution Identification of Base Stations in Cellular Networks
The performance of cellular system significantly depends on its network
topology, where the spatial deployment of base stations (BSs) plays a key role
in the downlink scenario. Moreover, cellular networks are undergoing a
heterogeneous evolution, which introduces unplanned deployment of smaller BSs,
thus complicating the performance evaluation even further. In this paper, based
on large amount of real BS locations data, we present a comprehensive analysis
on the spatial modeling of cellular network structure. Unlike the related
works, we divide the BSs into different subsets according to geographical
factor (e.g. urban or rural) and functional type (e.g. macrocells or
microcells), and perform detailed spatial analysis to each subset. After
examining the accuracy of Poisson point process (PPP) in BS locations modeling,
we take into account the Gibbs point processes as well as Neyman-Scott point
processes and compare their accuracy in view of large-scale modeling test.
Finally, we declare the inaccuracy of the PPP model, and reveal the general
clustering nature of BSs deployment, which distinctly violates the traditional
assumption. This paper carries out a first large-scale identification regarding
available literatures, and provides more realistic and more general results to
contribute to the performance analysis for the forthcoming heterogeneous
cellular networks
La morale dialectique de Barbe-bleue (Christian-Jaque, 1951) : la portĂ©e parodique dâun tribunal de la fiction
Certains films, en composant un tribunal de la fiction, mettent en jugement leurs personnages. DĂšs lors, si le sens moral caractĂ©rise les contes, quâen est-il dans une parodie cinĂ©matographique du genre ? Lâexamen de Barbe-bleue (Christian-Jaque, France, 1951) montre que ce type dâadaptation sâinscrit dans le paradigme du tribunal de la fiction et prolonge dialectiquement la morale des contes Ă©crits quâil semblait pourtant subvertir. Certes, cette production semble repousser la perversitĂ© de son personnage principal pour modifier la morale du conte de Perrault. Mais le film sâavĂšre polyphonique, ce qui interroge sa version littĂ©raire sans nĂ©gliger sa portĂ©e morale.Some films put their characters in judgment. In this context, if moral sense characterizes tales, what about a cinematic parody of the genre? The examination of Barbe-bleue (Christian-Jaque, France, 1951) shows that this type of adaptation is part of the paradigm of the imaginary court and dialectically prolongs the morality of the written tales that he seemed to subvert. On the one hand, this production seems to repel the perversity of its main character in order to change the morals of Perraultâs tale. But, on the other hand, the film turns out to be polyphonic, which questions the literary tale without rejecting its moral aspect
An algorithm proposal for a minimum cost SDR multi-standard system using graph theory
International audienceThe design of future multi-standard systems remains a challenge due to increasing flexibility requirements. Promising solutions include designing flexible radio architectures that exploit common aspects between the different set of standards cohabiting in the device. In this paper, graph theory appears and particularly the study of directed hypergraphs, which helps in the research concerning minimum cost multistandard designs. A cost function which calculates the cost of any possible option of implementation is mentioned but its derivations won't be in the scope of this paper. Our objective is to optimize this proposed cost function to its minimum possible value and thus solving the optimization problem that finds balance between flexibility and computing efficiency. For this, we propose a Minimum Cost Design (MCD) algorithm capable of selecting the option which has the minimum cost to pay and will present its complete set of instructions in this paper. This algorithm exploits various definitions and notations of directed hypergraphs
Le vestige et la ruine dans Few of us (1996) de Sharunas Bartas : les ornements sonores de lâoubli dâun peuple disparaissant
Si, selon Marc AugĂ©, « [l]âopĂ©rateur principal de la mise en âfictionâ de la vie individuelle et collective, câest lâoubli », comment signifier, sans commentaire ni dialogue, lâoubli dâun peuple - un peuple oubliĂ© et qui, peut-ĂȘtre, sâoublie ? Comment faire en sorte que lâoubli dâun peuple prĂšs dâĂȘtre englouti ne se rĂ©sume pas Ă un thĂšme ni Ă une reconstitution et devienne une figure dâĂ©criture ? Câest Ă ces questions que rĂ©pond Few of us. Cette fiction cinĂ©matographique lituanienne de Sharunas Bartas met en scĂšne quelques membres de la communautĂ© des Tofalars, de lâOblast dâIrkoutsk, en SibĂ©rie, figurant un peuple constituĂ© dâenviron sept cents personnes, jadis nomade, dĂ©sormais sĂ©dentarisĂ©, oubliĂ© du monde et peut ĂȘtre oublieux de sa culture et de son histoire. Le film se caractĂ©rise dâabord par une Ă©criture inhabituelle qui met en avant le silence et le mutisme des personnages, traversĂ©s de douces fulgurances sonores qui apparaissent comme un art de lâestompe. Cependant des formes survivantes des bruits et des chants du peuple des Tofalars traversent le vide apparent des paysages sonores, des formes se souvenant des quelques-uns qui vivent encore lĂ . Aussi semble-t-on fondĂ© Ă percevoir dans ces traces sonores les guenilles de lâhistoire dâun peuple disparaissant. Cette Ă©criture de lâhistoire rĂ©vĂšle le souffle continuĂ© des hommes Ă travers le tamis de la respiration du temps. Few of us met ainsi en Ćuvre lâoubli qui conditionne le dĂ©ploiement des possibilitĂ©s de se souvenir et la mise en mouvement du passĂ©.How represent, without comment or dialogue, oblivion of a people? In Few of us, a Lithuanian film fiction, Sharunas Bartas stages some members of the Tofalars community, living in Siberia. This people consists of about seven hundred people, formerly nomadic, now sedentary, forgotten by the world and perhaps partly oblivious to its own culture, forgetful to its own history. The film is primarily characterized by an unusual writing that highlights the silence and the mutism of the characters. However, the ancestral sounds and songs of the Tofalars cross the empty soundscape: these very simple shapes suggest the life of the people who still live there. These sounds are the rags and the footsteps of the story of a disappearing people
LâĆil sensible aux jeux de surface : la provocation comme appel Ă juger lâapparence des images dans Hi, Mom! et Redacted de Brian De Palma
La provocatio Ă©tait autrefois non seulement un « dĂ©fi » mais aussi un imprescriptible « droit d'appel » au peuple, un « appel en justice » qui protĂ©geait les citoyens. Le sens de ce droit a perdurĂ©. Aussi peut-on faire le lien entre la provocation et lâappel au jugement, tel quâil apparaĂźt dans deux films de Brian De Palma. Avec Hi, Mom ! (1969) et Redacted (2007), le goĂ»t de la provocation procĂšde dâune pratique de la rĂ©Ă©criture et dâun appel au jugement des images en vue de rendre lâĆil sensible Ă leur apparence.Provocatio was once not only a âchallengeâ but also an inalienable âright of appealâ to the people, a âright of appealâ that protected citizens. The meaning of this right has endured. Thus we can make the connection between provocation and judgment, as it appears in two films by Brian De Palma. With Hi, Mom ! and Redacted, the taste for provocation is embodied in a practice of rewriting and requires spectatorâs judgment on picture. That way the eye can become responsive to imagesâ aspect
- âŠ