Search results for "City."
showing 10 items of 12094 documents
Performance of an asymmetric and asynchronous decode-and-forward FBMC relay system
2014
End-to-end link performance of an asymmetric and asynchronous dual-hop decode-and-forward (DF) relay system built up using a causal multirate filter bank multicarrier (FBMC) technique operated under Rayleigh fading is presented. Three main performance measures namely bit error rate (BER), outage probability and channel capacity are used for this evaluation and approximate closed-form expressions for them are also made available. FBMC setup is modeled in exact form without any approximations while customizing to one of the most efficient subcarrier filter. Simulations are carried out in quasi-static multipath fading channels under symmetric, asymmetric, synchronous and asynchronous condition…
Design of a Cleaning Program for a PV Plant Based on Analysis of Energy Losses
2015
Solar photovoltaic (PV) energy has grown significantly over the past few years. However, despite the increase in installed capacity, this energy source still raises important concerns related to the variability of power production. The short-term effects such as cloud shadowing and supply interruptions, as well as long-term effects such as dust accumulation, seasonal variation, and ageing of PV modules, can cause variability of power production. Therefore, the analysis of all the variability sources in order to provide statistically consistent power production data is an important challenge. This study presents a methodology to analyze data from a PV plant in order to have an independent ev…
Crystal Structures and Density Functional Theory Calculations of o-and p-Nitroaniline Derivatives: Combined Effect of Hydrogen Bonding and aromatic i…
2013
The interplay of strong and weak hydrogen bonds, dipole–dipole interactions, and aromatic interactions of o- and p-nitroaniline derivatives was studied by combining crystal structure analysis and density functional theory (DFT) calculations. Crystal structures of four 2-nitroaniline derivatives, 2-((2-nitrophenyl)amino)ethyl methanesulfonate (1A), 2-((2-nitrophenyl)amino)ethyl 4-methylbenzenesulfonate (2A), N,N′-((1,3-phenylenebis(oxy))bis(ethane-2,1-diyl))bis(2-nitroaniline) (3A), and N-(2-chloroethyl)-2-nitroaniline (4A), and crystal structures of three 4-nitroaniline derivatives, 2-((4-nitrophenyl)amino)ethyl methanesulfonate (1B), 2-((4-nitrophenyl)amino)ethyl 4-methylbenzenesulfonate (…
Does innovativeness reduce startup survival rates?
2015
There are two competing hypotheses explaining how innovativeness influences the survival of startups: On the one hand, innovativeness is argued to foster survival-enhancing attributes (e.g., market power and cost efficiency) and capabilities (e.g., absorptive capacity). On the other hand, an innovative startup faces (and bears the associated risks of) liabilities of newness and smallness that exceed those of its non-innovative counterparts. The available empirical literature addressing this theoretical tension mostly supports the former hypothesis; we suggest that this finding is, in part, driven by the common practice of employing an ex post measure that already embodies a degree of succes…
Reciprocal commitment in academic careers? : Finnish implications and international trends
2016
This study explores the nature of reciprocal commitment in academic careers. The article is based on a survey conducted in autumn 2013 among fixed-term employees at eight major universities in Finland (N = 810). The analysis is focusing on researchers who have a doctoral degree and who are working on a fixed-term contract at their university (n = 308). According to our study, researchers experience their working conditions are insecure and many of them have considered leaving their universities. Despite the fact that they find their work meaningful their uncertain and poor working conditions are related to their thoughts of leaving the university. In addition in many of the cases leaving th…
Vapaaehtoistyöntekijöiden kokemuksia vastavuoroisuudesta ikääntyneiden ihmisten vapaaehtoistyössä
2019
Sosiaalisen vaihdon teorian mukaan vastavuoroisuus on tärkeää ikääntyneiden ihmisten suhteissa. Vapaaehtoistyössä vastavuoroisuus on oleellista, mutta sitä ei ole juuri tutkittu eläkeikäisten vapaaehtoistyöntekijöiden kannalta. Tämän tutkimuksen tarkoituksena on selvittää, kuinka eläkeikäiset vapaaehtoistyöntekijät kokevat vastavuoroisuuden vapaaehtoistyössä. Kolme kuukautta kestäneen toimintajakson aikana vapaaehtoistyöntekijät auttoivat liikkumiskyvyn ongelmista kärsiviä ikäihmisiä osallistumaan kodin ulkopuoliseen toimintaan osana Vapaaehtoistyö, ulkoliikunta ja vanhusten hyvinvointi (VAU) -tutkimushanketta. Tämän laadullisen osatutkimuksen 17 osallistujaa olivat 61 - 72-vuotiaita. Tutki…
Scaffolding teachers to foster inclusive pedagogy and presence through collaborative action research
2017
Teachers can be influential change agents in transforming their schools if they regularly reflect on their pedagogical practices, looking for improvements that will help all learners reach their fu...
Rola technologii informacyjnych w kreowaniu smart city na przykładzie monitorowania rozprzestrzeniania się pandemii COVID-19
2022
Współczesne miasta stoją w obliczu ogromnych zmian, związanych nie tylko z postępującą urbanizacją, ale także ze starzeniem się społeczeństwa, szeroko rozumianym bezpieczeństwem i zdrowiem publicznym. Zrównoważony i dynamiczny rozwój miasta prowadzi do powstania nowej formy rozwoju urbanistycznego, który wykorzystuje nowe technologie informacyjno- informatyczne, takie jak m.in. IoT i Claud Computing, Big Data, Blockchain czy Industry 4.0. Narzędzia te wspierają procesy zarządcze w mieście i pozwalają na większą integrację wszystkich interesariuszy. Podłączenie do globalnej sieci wszystkich urządzeń przetwarzających dane pozwala na wzajemne komunikowanie się bez pośrednictwa człowieka. Zasto…
High-Performance Lead-Acid Batteries Enabled by Pb and PbO2 Nanostructured Electrodes: Effect of Operating Temperature
2021
Lead-acid batteries are now widely used for energy storage, as result of an established and reliable technology. In the last decade, several studies have been carried out to improve the performance of this type of batteries, with the main objective to replace the conventional plates with innovative electrodes with improved stability, increased capacity and a larger active surface. Such studies ultimately aim to improve the kinetics of electrochemical conversion reactions at the electrode-solution interface and to guarantee a good electrical continuity during the repeated charge/discharge cycles. To achieve these objectives, our contribution focuses on the employment of nanostructured electr…
Współczesna metropolia: tożsamość i formy bycia razem jej mieszkańców
2018
The following paper examines the Baumanian “forms of togethernes” in the space of the contemporary metropolis, both in the West (Europe, the USA), and the developing world (China). Zygmunt Bauman understands togetherness as a totality of interhuman actions, occurring in the city space. Paradoxically, the contemporary metropolis which often seems hostile towards traditional bourgeois urban life opens up new possibilities of mutual relations between contemporary citizens. The space in the contemporary city is neither fully artificial, nor natural, but it merges some features of both. Although its infrastructure is governed by effectiveness of molecular capitalism, it is not fully predicable i…