Search results for "39"

CALIBRATION OF LÉVY PROCESSES USING OPTIMAL CONTROL OF KOLMOGOROV EQUATIONS WITH PERIODIC BOUNDARY CONDITIONS

2018

We present an optimal control approach to the problem of model calibration for L\'evy processes based on a non parametric estimation procedure. The calibration problem is of considerable interest in mathematical finance and beyond. Calibration of L\'evy processes is particularly challenging as the jump distribution is given by an arbitrary L\'evy measure, which form a infinite dimensional space. In this work, we follow an approach which is related to the maximum likelihood theory of sieves. The sampling of the L\'evy process is modelled as independent observations of the stochastic process at some terminal time $T$. We use a generic spline discretization of the L\'evy jump measure and selec…

Evapotranspiración de la cubierta vegetal mediante la determinación del coeficiente de cultivo por teledetección. Extensión a escala regional: Acuífe…

2006

En el seguimiento de las necesidades h´ýdricas de las cubiertas vegetales se utiliza,en pr´acticamente todo el mundo, la metodolog´ýa Kc−ETo (conocida comometodolog´ýa en dos pasos), donde Kc es el coeficiente de cultivo y ETo la evapotranspiraci´on de referencia.Desde la perspectiva operacional, la determinaci´on desde sat´elite del coeficientede cultivo Kc permite hacer una estimaci´on continua de la evapotranspiraci´on, y, por tanto, unas previsiones de las necesidades h´ýdricas de la cubiertavegetal. La teledetecci´on permite determinar dicho coeficiente sobre grandes´areas. Teniendo en cuenta estos precedentes, esta tesis es una continuaci´onde los trabajos previos existentes en …

Els significats de l'activitat física al poliesportiu d'una presó: una etnografia.

2005

L'objectiu d'aquesta etnografia consisteix en comprendre les interpretacions i significats que les persones preses i els treballadors de la presó tenen dels successos que ocorren al poliesportiu d'una presó. Aconseguit l'accés a la presó i als diversos col·lectius informants, es recullen dades durant dos anys. L' investigador, com un instrument recolector d'informació, decideix como, què i a qui observa i entrevista o què documents recull. L'anàlisi de les esmentades dades consisteix en separar la informació en unitats d'anàlisi, classificar-les i agruparles codificades amb etiquetes extretes inductivament. D'aquesta manera es reduixen les dades i es facilita l'extracció de categories que r…

Valenza e insegnamento della lingua straniera

2015

This work deals with valency, a key syntactic notion whose chemistry-inspired label was established by Lucien Tesnière (1959), one of the most well-known contributors to the Prague Linguistic Circle. We will concentrate on two questions: (a) to what extent does valency play a role in Second Language Learning (SLL)?; and (b) what role should the use of valency play in language teaching practices? This paper will provide answers to these questions and propose reasons for motivating the use of valency in SLL.

Which Helpless Nature Drops When Pushed Upon a Scene : readymade i antropocen

2016

Masteroppgave kunstfag- Universitetet i Agder, 2016

Ethics and education of psychiatrists dealing with mentally disordered young patients offenders in a detention setting

2010

Student participation in peer interaction

2021

This study explores how students deal with material resources in their peer interaction when working in pairs in an open-ended problem-solving task. The productive use of material resources can be expected to support successful peer work. However, research into social phenomena in peer interaction is needed in order to identify and describe productive and less productive forms of dealing with material resources as students participate in open-ended problem-solving tasks. Consequently, this explorative study responds to this research need. Based on multimodal data, including video recordings, transcribed talk and the written contributions from four pairs of Year 7 students aged 12-13 years, …

Chikage Oba-Smidt, The Oral Chronicle of the Boorana in Southern Ethiopia: Modes of Construction and Preservation of History among People without Wri…

2017

Review

Liminaalitilan käsite työn muutosten jäsentäjänä

2013

Liminaalitila on antropologiassa määritelty välitilaksi, kynnyksellä olemiseksi. Liminaalisuus on nykypäivän työelämälle ominainen piirre, joka voi näyttäytyä kaaoksena, mutta myös uutta luovana muutosvaiheena.

Extremal Irregular Digraphs

2018

A digraph is called irregular if its distinct vertices have distinct degree pairs. An irregular digraph is called minimal (maximal) if the removal of any arc (addition of any new arc) results in a non-irregular digraph. It is easily seen that the minimum sizes among irregular n-vertex whether digraphs or oriented graphs are the same and are asymptotic to (√2/3) n3/2; maximum sizes, however, are asymptotic to n2 and n2/2, respectively. Let s stand for the sum of initial positive integers, s = 1, 3, 6, . . . . An oriented graph Hs and a digraph Fs, both large (in terms of the size), minimal irregular, and on any such s vertices, s ≥ 21, are constructed in [Large minimal irregular digraphs, Op…