Search results for "HTI"

Enhanced field-of-view integral imaging display using multi-Köhler illumination.

2014

A common drawback in 3D integral imaging displays is the appearance of pseudoimages beyond the viewing angle. These pseudoimages appear when the light rays coming from each elemental image are not passing through the corresponding microlens, and a set of barriers must be used to avoid this flipping effect. We present a pure optical arrangement based on Köhler illumination to generate these barriers thus avoiding the pseudoimages. The proposed system does not use additional lenses to project the elemental images, so no optical aberrations are introduced. As an added benefit, Köhler illumination provides a higher contrast 3D display. This work was supported in part by the Plan Nacional I + D …

Primeras consideraciones a la Ley Orga?nica 3/2021, de 24 de marzo, de regulación de la eutanasia. el reconocimiento de un nuevo derecho

2021

The aim of this paper is to carry out a brief study of the recent Organic Law 3/2021, of March 24, on the regulation of euthanasia (BOE. March 25, 2021) approved in Spain, from a constitutional perspective, highlighting its main aspects. The matter under study is not exempt from controversy because it covers legal, medical and ethical considerations of great complexity.

Bioloģijas sekcija "Latvijas ūdeņu vides pētījumi un aizsardzība": Referātu tēžu krājums

2022

Vaalirahoituskohu Aamulehden, Helsingin Sanomien ja Keskisuomalaisen pääkirjoituksissa

2011

Tässä tutkielmassa kuvataan, mistä ja miten Aamulehti, Helsingin Sanomat ja Keskisuomalainen kirjoittivat vaalirahoitusta käsittelevissä pääkirjoituksissaan aikavälillä 7.5.2008–17.9.2010. Tutkielmassa kiinnitetään huomiota siihen, mitä aiheita lehdet vaalirahoituksen yhteydessä käsittelivät, keitä toimijoita lehdet nostivat esiin ja mihin lähteisiin nojaten lehdet kirjoittivat pääkirjoituksensa. Tutkielman pääasiallisena tutkimusmenetelmänä on käytetty määrällistä sisällön erittelyä, jonka avulla kirjoitukset on luokiteltu sisältöluokkiin aihe-, toimija- ja lähdeulottuvuuksien mukaan. Tulosten analyysivaiheessa apuna on käytetty laadullista kehysanalyysia. Vaalirahoituskirjoittelun yhteyde…

Karl Ove Knausgård: Aamutähti

2021

Kirja-arvostelu teoksesta Karl Ove Knausgård: Aamutähti, suom. Heikki Linnove, Like 2021 nonPeerReviewed

Forest Road Planning, Construction and Maintenance to Improve Forest Fire Fighting: a Review

2019

Forest roads play a key-role in fire fighting activities. In fact, all ground-based activities are strictly related to the presence of forest roads as access to fire edge. In spite of this important role, forest roads are often planned and built without considering their use in fire fighting, and this also occurs in literature, where few studies are dedicated to the importance of forest roads in fire fighting. A well-developed and well-maintained forest road network is the answer to different needs in fire management. The objective of this review is to clarify basic principles for obtaining efficient road network also for fire fighting, collecting, defining and resuming the main roles, the …

Information content of data and variables and types of weighting in least-squares regression methods

1990

Abstract Algorithms are given for evaluating the relative amount of useful information related to a particular parameter which is carried by individual data points and intervals of the variables. The algorithms provide an efficient means of using the information contained in a set of data. Applications to the optimization of weighting in regression methods are described. Several informational and combined informational-statistical types of weighting are studied as a means of improving the accuracy and precision of the parameters obtained by non-linear regression.

Dynamic Volatility Weighting in the Presence of Transaction Costs

2015

Numerous empirical studies demonstrate the superiority of dynamic strategies with volatility weighting over time mechanism. These strategies control the portfolio risk over time by adjusting the risk exposure according to updated volatility forecasts. Yet, in order to reap all benefits promised by volatility weighting over time, the composition of the active portfolio must be revised rather frequently. Transaction costs represent a serious obstacle to benefiting from this dynamic risk control technique. In this paper we propose a modified volatility weighting strategy that allows one to reduce dramatically the amount of trading costs. The empirical evidence shows that the advantages of the …

Myopia, the challenge of Ophthalmology and its worldwide “explosive epidemic”

2018

Improved usability of the minimal model of insulin sensitivity based on an automated approach and genetic algorithms for parameter estimation.

2006

Minimal model analysis of glucose and insulin data from an IVGTT (intravenous glucose tolerance test) is widely used to estimate insulin sensitivity; however, the use of the model often requires intervention by a trained operator and some problems can occur in the estimation of model parameters. In the present study, a new method for minimal model analysis, termed GAMMOD, was developed based on genetic algorithms for the estimation of model parameters. Such an algorithm does not require the fixing of initial values for the parameters (that may lead to unreliable estimates). Our method also implements an automated weighting scheme not requiring manual intervention of the operator, thus impro…