Search results for " element"
showing 10 items of 2679 documents
Computational Fluid Dynamics (CFD) and Finite Element Analysis (FEM) of a Customized Stent-Graft for Endovascular (EVAR) Treatment of Abdominal Aorti…
2023
Background: The treatment of abdominal aortic aneurysm (AAA) is today commonly treated by inserting a stent-graft by the endovascular route, without resorting to open surgery. However, some clinical cases do not allow this less invasive approach, meaning that the stent-graft cannot be inserted and open surgery is used. Methods: In the study, we propose a fluid–structure interaction (FSI) analysis of an aneurysmatic aorta that could not be treated with Endovascular Aneurysm Repair (EVAR). The vessel is reconstructed through segmentation from CT scans and subsequently modeled on CAD software to create the surface and thickness of the vessel itself. Subsequently, we proceeded to carry out Comp…
Kūdras sastāva ietekme uz elementu akumulāciju zemajos purvos
2016
Elektroniskā versija nesatur pielikumus
Liiketoimintatiedon hallinnan pelillistäminen
2018
Tämä työ on Pro gradu -tutkielma, jossa on haettu vastauksia siihen, mitä on liiketoimintatiedon hallinta ja pelillistäminen. Työn tarkoituksena on selvittää, mistä liiketoimintatiedon hallinnassa ja pelillistämisessä on kysymys, ja kuin-ka pelillistämistä voitaisiin soveltaa liiketoimintatiedon hallintaan ja mitä hyö-tyä pelillistämisellä voidaan saavuttaa liiketoimintatiedonhallinnassa. Liike-toimintatiedon hallinta on organisaatioille erittäin hyödyllistä ja nykypäivänä erittäin tärkeää menestymisen kannalta, mutta se koetaan usein hyvin työlääksi ja hankalaksi. Tutkielmassa tarkastellaan kirjallisuuskatsauksen kautta liike-toimintatiedon hallintaa pelillistämisen näkökulmasta ja esitetä…
Oppimispelit ja oppijan motivointi pelillistämisen avulla
2015
Tämä työ on kirjallisuuskatsaus, jossa perehdytään oppimispeleihin ja pellistämiseen sekä oppijan motivointiin. Tutkielmassa on pyritty selvittämään se, mitä tarkoitetaan pelillistämisellä, mikä on oppimispeli ja kuinka oppijaa voidaan motivoida oppimispeleissä käyttäen pelillistämistä. Pelaaminen on 2000-luvulla yleistynyt ja siitä on tullut osa lähes kaikkien ihmisten arkea. Tästä syystä pelejä ja pellistämistä on tutkittu paljon ja pohdittu pelien potentiaalia ja hyödyntämistä opetuksessa. Pelillistämisellä tarkoitetaan pelillisten elementtien käyttöä ei-pelillisessä kontekstissa. Tutkielmassa on tuotu esille kolme teoriaa motivoinnista ja sovellettu niitä oppimispeleihin. ARCS-malli kes…
Efficiency Improvement of Permanent-magnet Synchronous Motor Drives for Household Appliances
2011
This paper deals with some aspects of efficiency improvement of PMSMD (Permanent Magnet Synchronous Motor Drives). Particularly two aspects are focused: the control algorithm for the PMSMD, which allows to reduce the power losses of the electric drive without penalty on its dynamic performances and the optimization of an IPMSM (Interior Permanent Magnet Synchronous Motor) rotor configuration capable to increase the performances in terms of shaft torque production, limiting at the same time the rotor leakage flux. The loss minimization algorithm is here briefly analysed, a test bed for experimental validation is presented and the data are analysed. Experimental tests have been performed aimi…
Study of very forward energy and its correlation with particle production at midrapidity in pp and p-Pb collisions at the LHC
2022
Journal of high energy physics 08(8), 86 (2022). doi:10.1007/JHEP08(2022)086
BEM analysis of a piezoelectric structural health monitoring system for delamination detection
2013
In the present work a piezoelectric based structural health monitoring (SHM) system is analyzed with the aim of assessing the ability of the piezoelectric patch to detect both edge and embedded delaminations proper of flange-skin composite laminated structures. he boundary element model is developed for piezoelectric solids and is implemented by taking advantage of the multidomain technique to model laminated and cracked configurations. A non-linear spring model interface is then implemented in conjunction with an iterative procedure allowing for the simulation of the finite stiffness of the bonding layers as well as of the non-penetration condition of the delamination surfaces. he dynamic …
Improved pairwise comparison transitivity using strategically selected reduced information
2021
To judge the mutual relationship among elements, pairwise comparisons (PC) are widely used in decision modelling. PC is especially useful when the involved elements are intangible. Frequently, the number of elements to be compared may be very large. When dealing with n elements, the number of PCs is, under the reciprocity hypothesis, n(n − 1)/2. PCs are compiled in so-called pairwise comparison matrices (PCM). In the presence of missing entries due to uncertainty or lack of information, decision-making must be performed from the available incomplete information. Making all the comparisons in the complete case may be tedious, strenuous and time-consuming for the actors, may blur the body of …
COMPUTATIONAL HOMOGENIZATION OF POLYCRYSTALLINE MATERIALS WITH PORES: A THREE-DIMENSIONAL GRAIN BOUNDARY FORMULATION
2012
In this study, the influence of porosity on the elastic effective properties of polycrystalline materials is investigated using a 3D grain boundary micro mechanical model. The volume fraction of pores, their size and distribution can be varied to better simulate the response of real porous materials. The formulation is built on a boundary integral representation of the elastic problem for the grains, which are modeled as 3D linearly elastic orthotropic domains with arbitrary spatial orientation. The artificial polycrystalline morphology is represented using 3D Voronoi Tessellations. The formulation is expressed in terms of intergranular fields, namely displacements and tractions that play …