Search results for "application"
showing 10 items of 5559 documents
Enabling Energy Savings in Offshore Mechatronic Systems by using Self-Contained Cylinders
2019
This paper proposes a novel actuation system for an offshore drilling application. It consists of three self-contained electro-hydraulic cylinders that can share and store regenerated energy. The energy saving potential of the proposed solution is analyzed through a multibody system simulation. The self-contained system demonstrates superior energy efficiency compared to the benchmark system representing the state-of-the-art approach used today (i.e., valve-controlled cylinders by means of pressure-compensated directional control valves and counter-balance valves, supplied by a centralized hydraulic power unit). Due to the power on demand capability, the cancellation of the throttling losse…
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…
Iterative Learning Applied to Hydraulic Pressure Control
2018
This paper addresses a performance limiting phenomenon that may occur in the pressure control of hydraulic actuators subjected to external velocity disturbances. It is demonstrated that under certain conditions a severe peaking of the control error may be observed that significantly degrades the performance of the system due to the presence of nonlinearities. The phenomenon is investigated numerically and experimentally using a system that requires pressure control of two hydraulic cylinders. It is demonstrated that the common solution of feed forwarding the velocity disturbance is not effective in reducing the peaking that occurs as a result of this phenomenon. To improve the system perfor…
Trening metaleksykograficzny w globalnej rzeczywistości online - praktyczna pomoc czy archaizm w międzykulturowym procesie glottodydaktycznym XXI wie…
2020
In this article, its author offers the practical considerations of a philologist, a linguist, a translation-studies researcher, and an eager modern-language academic teacher, regarding a rangę of contemporary technological solutions/tools for enhancing the acąuisition of a foreign language (English). In particular, the author refers to electronic pedagogical dictionaries - the monolingual Dictionary.com, the bilingual Wielojęzyczny słownik polski OFFLINE, and the semibilingual Słownik angielskiego Diki, which are presently commonly used by young language learners. Such smart-applications developed for smartphones and tablets — in the author’s view — are remarkable tools for enhancing the co…
Isolation of Four Lytic Phages Infecting Klebsiella pneumoniae K22 Clinical Isolates from Spain
2020
This article belongs to the Special Issue Bacteriophage—Molecular Studies.
Sociālais tīkls filozofijas cienītājiem
2022
Šajā dokumentā ir iekļauta Latvijas Universitātes Datorikas fakultātes kursa “Kvalifikācijas darbs” praktiskā darba ietvaros izstrādāta mobila lietotne “ Sociālais tīkls filozofijas cienītājiem” tehniskā dokumentācija, kas sevī ietver programmatūras prasību specifikāciju, datu bāzes un ekrānu projektējums. Sociālais tīkls filozofijas cienītājiem “Philosofy” ir lietotne Android platformai, kas ir paredzēta, kā specializēta iepazīšanās vietne cilvēkiem, kurā balstoties uz lietotāja piedāvātu, kāda domātāja citātu, lietotājs var izvēlēties vai vēlas iesaistīties diskusijā, lietotnē iestrādātajā sarakstes logā, kā arī apskatīt lietotnes satura izstrādātāja ieteiktajos citātos, vai arī ieteikt c…
A silicon photomultiplier-based analog front-end for DC component rejection and pulse wave recording in photoplethysmographic applications
2022
The growing attention towards healthcare and the constant technological innovations in the field of semiconductor components have allowed a widespread availability of smaller devices, suitable to be worn and able to continuously acquire physiological signals. Wearable devices are, however, more prone to yield signals corrupted by artifacts caused by movement. This issue is particularly relevant in photoplethysmographic (PPG) applications where also, to exploit the whole dynamic range of the acquisition device, the DC component of the signal should be removed and the AC component amplified. In this context, we have designed and realized an analog front-end (AFE) suitable to be integrated wit…
Extending the Power Range of a Solar Inverter
2018
Solar inverters feature a minimum and maximum limit of the maximum power point voltage. Overcoming these limits leads to a disconnection of the power equipment, thus wasting the solar energy. In this paper, a solution to extend the power range of a solar inverter is presented. The proposed solution extends he minimum maximum power point limit of a commercial solar inverter by means of a battery energy storage system, including a DC/DC power converter. The battery energy storage system is connected in series to the photovoltaic module. If the photovoltaic module voltage drops below the minimum maximum power point limit, the battery energy storage system is enabled thus boosting the input vol…
Technological and Economic Factors Determining ICT Level : Evidence from Rural Micro-Businesses in Democratic Republic of Congo
2018
The Democratic Republic of Congo (DRC) is the 11th largest country in the world although wars have devastated the economics of the country. In this vast but poor area, there are a lot of small businesses, particularly in agriculture. Therefore, focusing on small enterprises and their use of Information and Communication Technologies (ICT) can be a key issue in enhancing the nation's infrastructure, communications, social relations and economy. This research aims at increasing our understanding of these issues together by analysing the effects of ICT in micro‐level businesses in a developing country. The research focused on the rural neighbourhood of Ngandanjike in the area of Mbujimayi in s…
Lietotāju pieslēgšanas un pārvaldības sistēmas izstrāde
2021
Kvalifikācijas darbā aprakstītā lietotāju pieslēgšanas sistēmas ir daļa no AS DELFI tīmekļa vietnes. Pieslēgšanas sistēma ir iepriekšējās pieslēgšanas sistēmas uzlabotā un papildinātā versija, kas ļauj lietotājam pieslēgties sitēmai izveidojot jaunu profilu vai piesledzoties pie iepriekš jau izveidotā profila, labot profila datus, kā arī pārvaldīt lietotājam adresētu ziņojumu mainot to statusu vai dzēšot. Kā arī šī darbā aprakstītā pārvaldības, jeb administrēšanas sistēma ļauj privileģētiem lietotājiem piekļūt citu lietotāju datiem, izsūtīt ziņojumus tiem, kā arī iegūt statistikas datus par izsūtītiem ziņojumiem. Mērķis – ir AS DELFI vietnes pieslēgšanas sistēmas veiktspējas un saskarnes uz…