Search results for "aid"
showing 10 items of 3031 documents
Editorial for Special Issue “Fine Art Pattern Extraction and Recognition”
2021
Cultural heritage, especially the fine arts, plays an invaluable role in the cultural, historical, and economic growth of our societies [...]
A comparison study of evolutive algorithms for solving the partitioning problem in distributed virtual environment systems
2004
Fast Internet connections and the widespread use of high performance graphic cards are making Distributed Virtual Environment (DVE) systems very common nowadays. However, there are several key issues in these systems that should still be improved in order to design a scalable and cost-effective system. One of these key issues is the partitioning problem. This problem consists of efficiently assigning clients (3D avatars) to the servers in the system. In this paper, we present a comparison study of different modern heuristics for solving the partitioning problem in DVE systems, as an alternative to the ad hoc heuristic proposed in the literature. Performance evaluation results show that some…
Computer-Aided Simulation of Die Filling Processes
1989
Summary A numerical method for analysing the filling of axisymmetrical dies of complex shape is proposed. The method, which is a further development of a LP finite element model, is able to take into account the contact conditions directly in the mathematical formulation of the problem. In such a way the solution of the die filling process is obtained by solving a LP problem, avoiding problems of numerical convergence and the heavier calculations requested by other iterative methods.
A Qualitative-Quantitative Approach to V-Belt Mechanics
1996
A simplified formulation is adopted for the theoretical problem of tension distribution and radial penetration of a V-belt along the pulley groove. The trajectory portrait of the second order differential system describing the belt behavior is carefully analyzed and asymptotic approximations for the tension solutions are derived which are well suited for design purposes.
Helical Shift Mechanics of Rubber V-Belt Variators
2011
A very common configuration of V-belt variators for motorcycles considers the correction of the belt tensioning depending on the resistant torque by means of suitable helical-shaped tracks allowing the driven half-pulleys to close/open. The theoretical model for belt-pulley coupling is rather complex for this configuration, where one half-pulley may run in advance and the other one behind with respect to the belt, and requires the repeated numerical solution of a strongly nonlinear differential system by a sort of shooting technique, until all the operating conditions are fulfilled (angular contact extent, torque, and axial force). After solving the full equations, the present study develop…
Mikokompozīti kā alternatīva tradicionāli izmantotajiem iepakojuma materiāliem
2021
Nemainīga globāla problēma ir plastmasas piesārņojums, tādēļ pēdējā laikā aktualizējušies ekoloģiski iepakojuma materiāli no micēlija un augu biomasas. Pētījumā tika izveidoti sējas kaņepju spaļu, āra bērza ēveļskaidu un zāģskaidu un Trametes versicolor micēlija mikokompozīti ar pievienotām kviešu klijām un bērza mizu. Tika izvērtēta substrāta granulometrijas un sastāva ietekme uz mikokompozīta spiedes stiprību, ūdens uzsūcamību un noturību pret pelējumu. Labāko micēlija augšanu un mehāniskās uzrādīja paraugi ar pievienotām klijām, pazeminātu ūdens absorbciju – bērza mizu saturošie paraugi, pret pelējumu visiem paraugiem bija ļoti zema noturība. Būtiskāk par granulometriju bija micēlija dau…
Optisko metožu un ierīču izstrāde kardiovaskulārā stāvokļa kontrolei reālā laikā
2013
Elektroniskā versija nesatur pielikumus
Turaidas muiža 1871.g.-20.gs.20.gadi
2015
Muiža Latvijā 19. gadsimta otrajā pusē bija organizējošais elements lauku vidē, centrs ap kuru organizējās visa dzīve, gan saimnieciskajā, gan juridiskajā gan arī kultūras jomā. Bakalaura darba mērķis ir izpētīt Turaidas muižas sabiedrību no 1871. gada, kad muiža nonāk barona Baltazara Fon Kampenhauzena īpašumā līdz 20. gadsimta 20. gadiem. Lai to sasniegtu darbā tika apkopoti, sistematizēti un analizēti vēstures avoti par Turaidas muižas saimniecisko stāvokli šajā laika posmā, informācija par Turaidas muižas ļaudīm, to pienākumiem un hierarhisko struktūru Vidzemes kontekstā. Pētījumā izmantoto dokumentālo materiālu papildina mutvārdu liecību pieraksti. Darba rezultātā tiks papildināta hist…
Implementation of the inclusive CICO Plus intervention for pupils at risk of severe behaviour problems in SWPBS schools
2020
Check in–check out (CICO) is a widely used and studied behavioural intervention. Although CICO is an effective way to support pupils’ behaviour in a school context, not all pupils benefit from basic CICO. A single-case experimental study was designed to evaluate the effects of CICO Plus support (CICO Plus) for participants whose behaviour was determined to be non-responsive to basic CICO. CICO Plus was planned and implemented with four pupils identified by school CICO teams as needing additional behavioural support. Individual CICO Plus support was planned by multiprofessional teams working on each pupil’s case. The CICO Plus support was based on teaching social skills and behaviour at leas…
Theoretical studies on cycloaddition reactions
2014
Cycloaddition reactions represent one of the most powerful processes in organic chemistry. The most common types of cycloaddition reactions are the Diels-Alder (DA) and the 1,3-dipolar cycloaddition reactions (1,3-DCs) which lead to five and six membered rings, respectively. In our ongoing efforts to contribute to the understanding of DA and 1,3-DCs; we studied the following using the B3LYP/6-31G(d) level of theory: 1. The 1,3-DCs of the pyridinium-3-olates and pyrazinium-3-olates with methyl acrylate and methyl methacrylate [1,2]. 2. The competitive hetero-DA and 1,3-DCs of methyl glyoxylate oxime and its tautomeric nitrone with cyclopentadiene in the absence and in the presence of BF3 as …