Search results for " system"

Decoupled control scheme of grid-connected split-source inverters

2017

Grid-connected power conversion systems for renewable energy sources must fulfill several requirements, e.g., the high efficiency, the reduced cost and complexity, and, quite often, the boost capabilities that is usually achieved using a front-end dc–dc boost converter before the inversion stage, leading to a two-stage architecture. Meanwhile, single-stage power conversion systems, which perform the boosting operation within the inversion one, offer some potential advantages, in terms of reducing the complexity and the volume of the whole system. Among several proposed options, the split-source inverter (SSI) has been recently proposed by Abdelhakim et al. as an alternative option with some…

Voluntary Private Investments Role in Pension System in Latvia

2021

Pension systems have become one of the main priorities for the national governments. Developed countries population is getting older by putting the pressure on the state budgets and work age people tax load. The current pension system in Latvia performs according to regulation of state compulsory unfunded pension scheme since 1996 and regulation of the state funded or accumulated pension scheme since 2001. The third pension system pillar is private voluntary pension schemes realized in form of people contributions into pension funds and life insurance policies. Aim of the research – deeper analyses of voluntary private investments as the pension system part and its development challenges in…

Voluntary pension funds contribution in the pension system of Latvia in comparison with Estonia and Lithuania

2020

Pension system formation is one of the questions on the daily agenda for most countries of the world. Most attention and discussion focus on the first two pension system pillars – state compulsory unfunded pension scheme and the state-funded or accumulated pension scheme in pension funds, both based on mandatory contributions. Private voluntary investments are the “third pillar” of pension systems and the gear to ensure an adequate level of income at retirement age by creating private pension funds. Voluntary savings are becoming the source of retirement income received on a monthly basis in line with the progress of private pension funds and expansion of the choice of pension schemes. This…

Anatomical and electrophysiological study of the vomeronasal circuits: Amygdaloid response to odours and pheromones

2017

Rodents detect information concerning the world around them mainly through two chemosensory systems: the olfactory and the vomeronasal systems. In order to develop an appropriate behavioural response to their environment, these systems exhibit both functional and physiological convergence. Further understanding of the organization and function of the olfactory systems would allow us to comprehend how their information is integrated in the brain. In a first approach we performed a thorough analysis of the connections of key structures involved in the processing of vomeronasal information: the medial (Me) and the posteromedial cortical (PMCo) amygdaloid nucleus. Then, we enquire the populatio…

Wybory niekonkurencyjne w Polsce na poziomie lokalnym – wstępne oceny

2020

Artykuł podejmuje problem obsadzania mandatów bez głosowania w wyborach do rad gmin w gminach liczących do 20 tys. mieszkańców. W stosunku do wyborów z 2014 r. liczba takich przypadków wzrosła w 2018 r. o 77%. Wydaje się, że obowiązujące prawo wyborcze, w szczególności art. 418 § 1 (podział gmin na jednomandatowe okręgi wyborcze), art. 434 § 1 i 2 (zasady organizacji wyborów w przypadku zgłoszenia liczby kandydatów równej liczbie mandatów do obsadzenia) i art. 478 § 2 (tryb zgłaszania kandydatów na wójta lub burmistrza) Kodeksu wyborczego, w połączeniu z uwarunkowaniami lokalnej rywalizacji wyborczej, może sprzyjać powstawaniu zjawiska niekonkurencyjnych wyborów, które skutkują m.in. spadki…

E-health systems in digital environments

2019

As we live in the digital world, people can be provided with more effective treatment methods that allow them to live longer in their home and to live there better. People can be provided with better home care and preventive health care. People can easily carry portable sensors and intelligent devices in their bodies and wrists that relay their vital information to hospital systems in real time, from which healthcare staff can track human vitality even in real time. Although the digital world offers good opportunities to improve healthcare systems and make disease analyses more effective, we must look deeper about that issue. Devices and systems may not work well together. Almost every manu…

Ontology and protocol secure for SCADA

2014

In this work, we present a semantic cyber security system and we study its semantic intelligent systems vulnerabilities, focusing on the semantic attacks. For resolving semantic problems we propose a security global solution for the new generation of SCADA systems. The proposed solution aims at protecting critical semantic SCADA processes from the effects of major failures and semantic vulnerabilities in the modern IT-SCADA network. We used a security block in the global network access point, security protocols deployed in different network (OSI) levels and security ontologies deployed in security devices. We used our mixed coordinates (ECC) cryptography solution, this is an encryption tech…

Beyond early: Decision support for improved typhoon warning systems

2015

International audience; Warnings can help prevent damage and harm if they are issued timely and provide information that help responders and population to adequately prepare for the disaster to come. Today, there are many indicator and sensor systems that are designed to reduce disaster risks, or issue early warnings. In this paper we analyze the different systems in the light of the initial decisions that need to be made in the response to sudden onset disasters. We outline challenges of current practices and methods, and provide an agenda for future research.To illustrate our approach, we present a case study of Typhoon Haiyan. Although meteorological services had issued warnings; relief …

Intentiolähtöinen lähestymistapa käytettävyyttä koskevien vaatimusten määrittelyyn : kuluttajamarkkinoille suunnatun innovatiivisen ohjelmistotuottee…

2012

Complex plant quality—microbiota–population interactions modulate the response of a specialist herbivore to the defence of its host plant

2022

Many specialist herbivores have evolved strategies to cope with plant defences, with gut microbiota potentially participating to such adaptations. In this study, we assessed whether the history of plant use (population origin) and microbiota may interact with plant defence adaptation. We tested whether microbiota enhance the performance of Melitaea cinxia larvae on their host plant, Plantago lanceolata and increase their ability to cope the defensive compounds, iridoid glycosides (IGs). The gut microbiota were significantly affected by both larval population origin and host plant IG level. Contrary to our prediction, impoverishing the microbiota with antibiotic treatment did not reduce larv…