Search results for "i.i.d."
showing 10 items of 4310 documents
Un modello F.E.M. 3D per valutare le vibrazioni in campo ferroviario
2009
La stima del crossing-point nel modello di Cox per l'analisi di sopravvivenza: una proposta
2008
La variazione dell'effetto di un fattore di rischio in un modello di sopravvivenza a rischi proporzionali di Cox è di particolare interesse in molte applicazioni, in quanto l'allontanamento dall'ipotesi di proporzionalità dei rischi rende il modello inadeguato. Di particolare interesse è il caso in cui le funzioni di rischio di due gruppi si intersecano, ovvero, più in generale, il coefficiente di regressione cambia segno dopo un istante temporale detto crossing-point. In questo lavoro si propone una procedura per la stima del crossing-point applicabile anche al caso di variabili quantitative, e si discutono tre diversi metodi per la corrispondente stima intervallare. L'approccio è illustra…
Analisi numerica degli effetti della deformazione di membrane a scambio ionico sulla distribuzione dei fluidi in canali di Elettrodialisi
2019
L’elettrodialisi (ED) è una promettente tecnologia a membrana utilizzata in diversi campi, ad esempio nella dissalazione delle acque e nell’industria alimentare. L’ED usa un potenziale elettrico per indurre una migrazione selettiva di cationi ed anioni da una soluzione elettrolitica ad un’altra, sfruttando membrane a scambio ionico. Membrane anioniche e cationiche sono alternativamente collocate all’interno di una unità ED. A queste sono solitamente interposti spaziatori che prevengono il contatto tra le membrane e delineano i canali in cui scorrono le soluzioni. L’utilizzo di membrane profilate consente di costruire unità prive di tradizionali spaziatori a rete non conduttivi. In genere, l…
LINQ modeļu repozitorijiem
2016
Modeļu vadīta pieeja programmatūras izstrādes pasaulē pēdējā laikā kļūst arvien populārāka un attiecīgi arī aug pieprasījums pēc rīkiem, kas spēj efektīvi strādāt ar modeļiem. “LINQ modeļu repozitorijiem” darba ietvaros uzmanība tiek pievērsta iespējām strādāt ar modeļu repozitorijiem .NET satvarā C# programmēšanas valodā. Darbā tiek izpētītas LINQ adapteru izstrādes iespējas, modeļu repozitoriju piekļuves iespējas un izstrādāts LINQ adapteris modeļu repozitorijiem, kas balstās uz universālu RA API, kas ļauj izmantot dažādus modeļu repozitorijus, piemēram, populāro EMF.
Chemical-Based Methodologies to Extend the Shelf Life of Fresh Fish—A Review
2021
Due to its characteristics, fresh fish is a highly perishable food with a very short shelf-life under refrigeration. Several methods have been introduced to slow down its deterioration, such as by means of oxygen depletion of the food package (vacuum packaging), or by changing the natural atmosphere that is in contact with the fresh fish (modified atmosphere packaging), or by the use of chemicals generally recognized as safe: such compounds can be directly applied (by dipping or spraying) or incorporated into packaging materials and slowly migrate to the product, exerting a hurdle effect against microbial development and lipid oxidation (active packaging). This review aims to cover the most…
Tieto, tulkinta ja ymmärrys : elämismaailmallinen moraali ja moraalinen toiminta 5-6-vuotiaiden päiväkotilasten vertaissuhteiden konfliktitilanteissa
2013
Tämän monitieteistä lapsuudentutkimusta edustavan teoreettis-empiirisen tutkielman tehtävänä oli tarkastella, määrittää ja syventää tietoa koskien fenomenologis-hermeneuttista moraalia sekä pienten lasten moraalista toimintaa päiväkotikontekstissa. Tutkielman filosofisessa viitekehyksessä luonnosteltiin elämismaailmallista moraali-teoriaa, joka pohjautui ennen kaikkea Husserlin, Heideggerin ja Merleau-Pontyn fenomenologiaan. Tutkielma pohjasi ontologialtaan fenomenologiaan ja empirialtaan reflektiiviseen elämismaailmatutkimukseen sekä etnometodologiaan. Lasten moraali käsitettiin tutkielmassa osaksi yksilön elämismaailmaa ja kulttuuria. Tutkimustehtävinä oli määrittää 1) Millaisia käsityksi…
Do testate amoebae communities recover in concordance with vegetation after restoration of drained peatlands?
2016
The environmental importance of peatlands has stimulated efforts to restore their specific ecosystem structure and functions. Monitoring and assessment of the ecological state of the peatland is fundamental in restoration programmes. Most studies have focused on the responses of vegetation and, to a lesser extent, on testate amoebae (TA). To our knowledge, none have investigated whether these two groups show concordance in the context of restoration of drained peatland. Here we assess community concordance between TA and vegetation in boreal peatlands belonging to four different land use management classes (natural, drained, restored 3–7 years ago, and restored 9–12 years ago). TA and veget…
La sensibilità agli indizi semantici e alla struttura morfologica della parola: un confronto tra dislessici evolutivi e normolettori
2008
The Use of Moss Pleurozium schreberi (Brid.) Mitt. as Bioindicator of Radionuclide Contamination in Industrial Areas of Upper Silesia
2017
Mosses are good bioaccumulators of radionuclides and from the 60 of the last century, they are used as bioindicators of radioactive contamination in the environment. Concentration of impurities in moss represent the accumulation in mosses during the past 2-3 years. As a result, the moss composition analysis provides information on an average contamination within a few vegetation seasons. During our survey the measurements of radionuclide activity concentrations in P. schreberi transplanted from places relatively clean to heavily contaminated areas of Upper Silesia were carried out. An increase in the radionuclides activity concentrations in P. schreberi transplants may indicate not only dep…
Students' Physical Activity, Physical Education Enjoyment, and Motivational Determinants through a Three-Year School-Initiated Program
2023
Patterns of physical activity in adulthood are often established during adolescence, making this an important period for promoting physical activity. To address this, the Sotkamo Physical Activity as Civil Skill Program 2010–2014 was implemented to increase Grade 5 to 9 students’ physical activity on a daily basis. The purpose of this study was to examine the effects of program on students’ physical activity and enjoyment. Furthermore, the relationship between motivational climate and enjoyment, and the percentages of students who engaged in 60 minutes of moderate to vigorous physical activity on the daily basis were examined.