Search results for "model."
showing 10 items of 23664 documents
Toward Quaternary QCA : Novel Majority and XOR Fuzzy Gates
2022
As an emerging nanotechnology, quantum-dot cellular automata (QCA) has been considered an alternative to CMOS technology that suffers from problems such as leakage current. Moreover, QCA is suitable for multi-valued logic due to the simplicity of implementing fuzzy logic in a way much easier than CMOS technology. In this paper, a quaternary cell is proposed with two isolated layers because of requiring three particles to design this quaternary cell. Moreover, due to the instability of the basic gates, the three particles cannot be placed in one layer. The first layer of the proposed two-layer cell includes a ternary cell and the second one includes a binary cell. It is assumed that the over…
La Policía Local como Policía Integral Básica en el modelo policial español
2015
La Policía Local es una de las instituciones públicas menos investigadas. Esta ausencia de estudios contrasta con su importancia y con la evolución sufrida en los últimos tiempos, a lo que se añade que cuando existen publicaciones sobre la misma, estas se centran en aspectos políticos o jurídicos pero no abundan en el funcionamiento organizativo, las tareas o las relaciones con la población, es decir, se discute el modelo en sus aspectos normativos y/o políticos pero no la realidad. Por añadidura, la mayoría de los estudios son de carácter interno y apenas trascienden a nivel social. Es muy llamativa la ausencia de miembros de la Policía Local en ámbitos de debate público, congresos no corp…
Latvijas dienas laikrakstu politisko žurnālistu un 12. Saeimas deputātu naratīvi par Laimdotas Straujumas otrās valdības nomaiņu ar Māra Kučinska val…
2016
Bakalaura darba “Latvijas dienas laikrakstu politisko žurnālistu un 12. Saeimas deputātu naratīvi par Laimdotas Straujumas otrās valdības nomaiņu ar Māra Kučinska valdību” mērķis ir saprast, kādi naratīvi dominē mediju un politiķu mijiedarbībā. Darba teorētiskajā daļā ir skaidrots politiskās komunikācijas process, skaidrots krīžu jēdziens un to komunikācija, kā arī raksturota naratīva paradigma. Metdoloģiskajā daļā ir aplūkotas pētījumā izmantotās metodes- naratīva analīze, izmantojot A. J. Greimasa aktantu modeli un naratīva intervija. Pētnieciskajā daļā ir atspoguļota Latvijas dienas laikrakstu naratīvu analīze, rezultāti, veikts mediju salīdzinājums un veiktie secinājumi. Pētījumā se…
Latvijas iedzīvotāju politiskā līdzdalība internetā
2019
Bakalaura darba “Latvijas iedzīvotāju politiskā līdzdalība internetā” mērķis ir izpētīt un novērtēt, kā izpaužas Latvijas iedzīvotāju politiskā līdzdalība internetā. Pētījuma pamatuzdevumi ir: 1) noskaidrot, kādas ar politisko līdzdalību sasitītas darbības iedzīvotāji veic interneta vidē; 2) noteikt un salīdzināt dažādu sociālo grupu politiskās līdzdalības līmeni; 3) noteikt un salīdzināt ar kādām vērtībām sevi saista Latvijas iedzīvotāji, kādas politiskās līdzdalības aktivitātes veic saskaņā ar savām vērtībām. Darba teorētiskā ietvara veidošanā tika izmantots Verbas, Bredija un Šlozmanes brīvprātīgā pilsoniskuma modelis. Bakalaura darba empīriskajā pētījumā tika veikta tiešsaistes aptauja.…
Alder pollen in Finland ripens after a short exposure to warm days in early spring, showing biennial variation in the onset of pollen ripening
2017
We developed a temperature sum model to predict the daily pollen release of alder, based on pollen data collected with pollen traps at seven locations in Finland over the years 2000–2014. We estimated the model parameters by minimizing the sum of squared errors (SSE) of the model, with weights that put more weight on binary recognition of daily presence or absence of pollen. The model results suggest that alder pollen ripens after a couple of warm days in February, while the whole pollen release period typically takes up to 4 weeks. We tested the model residuals against air humidity, precipitation and wind speed, but adding these meteorological features did not improve the model prediction …
Regulation of Chromatin Remodeling through poly-ADP-ribosylation
2008
Sequestration of biogenic amines by alginic and fulvic acids.
2006
The interaction of natural (alginic and fulvic acids) and synthetic (polyacrylic acid 2.0 kDa) polyelectrolytes with some protonated polyamines [diamines: ethylendiamine, 1,4-diaminobutane (or putrescine), 1,5-diaminopentane (or cadaverine); triamines: N-(3-aminopropyl)-1,4diaminobutane (or spermidine), diethylenetriamine; tetramine: N.N'-bis(3-aminopropyl)-1,4-diaminobutane (or spermine); pentamine: tetraethylene-pentamine; hexamine: pentaethylenehexamine] was studied at T=25 degrees C by potentiometry and calorimetry. Measurements were performed without supporting electrolyte, in order to avoid interference, and results were reported at I=0 mol L(-1). For all the systems, the formation of…
Enhanced chain dynamics in loop-sorting-systems by means of layout optimization and a kinematic model of the polygon action
2012
Published version of an article in the journal: Structural and Multidisciplinary Optimization. Also available from the publisher at: http://dx.doi.org/10.1007/s00158-011-0743-7 Poor dynamics owing to polygon action is a known concern in mechanical applications of closed articulated chains. In this paper a kinematic model of the polygon action in large chains of loop-sorting-systems is proposed. Through optimization techniques the chain dynamics is improved by minimizing the polygon action using a parametric model of the track layout as design variables. Three formulations of the kinematic polygon action are tested on an average sized planer tracks layout to find a superior model. Verificati…
Impact of Separator Thickness on Temperature Distribution in Single Cell of Polymer Electrolyte Fuel Cell Operated at Higher Temperature of 90 °C and…
2022
The New Energy and Industry Technology Development Organization (NEDO) road map (Japan, 2017) has proposed that a polymer electrolyte fuel cell (PEFC) system, which operates at a temperature of 90 °C and 100 °C, be applied for stationary and mobility usage, respectively. This study suggests using a thin polymer electrolyte membrane (PEM) and a thin gas diffusion layer (GDL), at the same time, to achieve better power-generation performance, at a higher temperature than usual. The focus of this paper is to clarify the effect of separator thickness on the distribution of temperature at the reaction surface (Treact), with the relative humidity (RH) of the supply gasses and initial operation tem…
Weryfikacja kinetycznego modelu polimeryzacji etylenu wobec metaloorganicznych katalizatorów wanadowych na nośniku magnezowym
1998
The kinetic studies are reviewed on low-pressure polymerization of ethylene over two types of organovanadium catalysts, viz., MgCl 2(THF) 2/VCl 4/Et 2AlCl and MgCl 2(THF) 2VOCl 3Et 2AlCl, each deposited on a magnesium carrier. The polymerization rate was found to be directly related to the catalyst and monomer concentrations (Figs. 2 and 3), unless when the access of the monomer to the reactive V-C bond is restricted by diffusion. Polymer chain termination step was found to result from the reaction of the transfer onto the monomer and to be associated with the regeneration of the active site on which a new macromolecule can be formed. A kinetic model was developed for the ethylene polymeriz…