Search results for "OLT"
showing 10 items of 5524 documents
Radioteorian alkuvaiheita Weimarin tasavallasta sodan ajan Yhdysvaltoihin : Bertolt Brecht ja Theodor Adorno
2018
Generalized wave propagation problems and discrete exterior calculus
2018
We introduce a general class of second-order boundary value problems unifying application areas such as acoustics, electromagnetism, elastodynamics, quantum mechanics, and so on, into a single framework. This also enables us to solve wave propagation problems very efficiently with a single software system. The solution method precisely follows the conservation laws in finite-dimensional systems, whereas the constitutive relations are imposed approximately. We employ discrete exterior calculus for the spatial discretization, use natural crystal structures for three-dimensional meshing, and derive a “discrete Hodge” adapted to harmonic wave. The numerical experiments indicate that the cumulat…
Mass spectrometric analysis of heavy and base oils
2018
Base oil production from crude oil has become more complex as demanded product properties, yield objective and field competition have increased interest in research towards high viscosity index (VI) base oils. Conventional lubricant grade base oil enjoyed biggest market share until 2000-2004 but now high VHVI product demands have introduced also novel production methods for heavy-type base oils such as Ficsher-Tropsch method based gas-to-liquid (GTL) and poly-internal-olefin (PIO) base oils. In this MSc, different mass spectrometric methods for heavy and base oils where compared and in-house field ionization method was characterized and method validation was begun. Base oil mass analytics u…
Effects of high-intensity interval training on VO2max and post-exercise fat consumption in recreationally active adults compared to steady-state runn…
2016
Johdanto. Korkeatehoista intervalliharjoittelua on käytetty jo pitkään urheilijoiden valmennuksessa. Lisäksi viime vuosikymmeninä on julkaistu useita tutkimuksia harjoitusmuodon vaikutuksesta sekä vähän liikkuvien että kuntoliikkujien terveyteen ja fyysiseen kuntoon. Korkeatehoisen intervalliharjoittelun on todettu aiheuttavan positiivisia sentraalisia ja perifeerisiä muutoksia, kuten kohonnut aerobinen kunto ja tehostunut rasvan oksidointikyky. Tämän tutkimuksen tavoitteena oli tutkia 1) 8 viikon korkeatehoisen intervallijuoksun (HIIR), korkeatehoisen intervallikuntopiirin (HIICT) ja tasavauhtisen juoksun (SSR) vaikutuksia maksimaaliseen hapenottokykyyn sekä harjoituksen jälkeiseen rasvan …
Suunnistuksen lajianalyysi ja nuorten miessuunnistajien harjoittelun ohjelmointi
2006
Pasi Ikonen 2006. Suunnistuksen lajianalyysi ja nuorten miessuunnistajien harjoittelun ohjelmointi. Valmennusopin jatkokurssin seminaarityö, Liikuntabiologian laitos, Jyväskylän yliopisto, 38s. Suunnistuksen lajianalyysissä selvitetään ne tekijät, jotka ensisijaisesti vaikuttavat suorituskykyyn ja tuloksiin. Suunnistus on fysiologisesti samantyyppinen kuin muutkin kestävyyslajit, mutta biomekaanisesti suunnistussuorituksen vaatimukset vaihtelevat suunnistusmaaston mukaan. Suunnistustaidon osuus suunnistussuorituksessa on merkittävä ja tuloksen lajissa määrää fyysisen ja psyykkisen suorituskyvyn yhdistelmä, psykofyysinen kapasiteetti. Urheilija-analyysissä selvitetään niitä tekijöitä, jotka …
Il ruolo della comprensione del testo nel processo di matematizzazione e modellizzazione
2017
In questo articolo vengono analizzate le risposte fornite a un interessante item relativo alla Prova standardizzata di matematica somministrata nel maggio 2015 a tutti gli allievi di quinta elementare del Canton Ticino. A partire dai risultati statistici emersi da un campione di 508 protocolli selezionati, viene presentata un’analisi qualitativa effettuata su un campione più ristretto di 174 studenti di prima media, allo scopo di rintracciare le cause delle difficoltà emerse nella risoluzione. Da questa analisi si rileva come le risposte sbagliate di diversi studenti siano legate a difficoltà nella comprensione del testo dell’item, in particolare a difficoltà di interpretazione linguistica.…
Longhorn beetles of the Ficuzza woods (W Sicily, Italy) and their relationship with plant diversity (Coleoptera, Cerambycidae
2010
The woods in Sicily are the result of centuries of anthropogenic activities that have reduced the surface of wood and changed the original composition even with the introduction of alien species to native flora. The value in terms of biodiversity of these forests remains, however, high for they are the last refuge areas for many animals and plant species. This study was conducted within the Ficuzza woods (West Sicily), extended about 5,000 hectares on the slopes of limestone-dolomite rock of Busambra (1615 m asl), within which lies the largest remaining forest area in western Sicily. It is an area with a wide diversity of vegetation, represented mainly by native forests (holm oak, cork oak,…
Polysubstituted ferrocenes as tunable redox mediators
2018
A series of four ferrocenyl ester compounds, 1-methoxycarbonyl- (1), 1,1’-bis(methoxycarbonyl)- (2), 1,1’,3-tris(methoxycarbonyl)- (3) and 1,1’,3,3’-tetrakis(methoxycarbonyl)ferrocene (4), has been studied with respect to their potential use as redox mediators. The impact of the number and position of ester groups present in 1–4 on the electrochemical potential E1/2 is correlated with the sum of Hammett constants. The 1/1+–4/4+ redox couples are chemically stable under the conditions of electrolysis as demonstrated by IR and UV–vis spectroelectrochemical methods. The energies of the C=O stretching vibrations of the ester moieties and the energies of the UV–vis absorptions of 1–4 and 1+–4+ c…
Rimboschimento e recupero di soprassuoli forestali artificiali degradati: due aspetti fondamentali per la salvaguardia del territorio montano - Refor…
2015
I fenomeni di dissesto del territorio che in questi ultimi anni sembrano acutizzarsi e recare ferite profonde in tutto il Paese, se da un lato sono quasi endemici data la morfologia e la natura dei terreni, certamente dall'altro sono frutto della mancanza di gestione pianificata e programmatica dell'uso del territorio. Ad esse si unisce il profondo mutamento del tessuto sociale e il conseguente abbandono di molte aree agricole e forestali divenute marginali all'attività economica, cui non ha fatto fronte una politica di salvaguardia del territorio efficace e duratura. Ai problemi di stabilità del territorio montano e collinare, spesso originati da inadeguate attività umane, si è fatto front…
Straw uses trade-off only after soil organic carbon steady-state
2018
Soil organic matter (SOM) is the key for a healthy soil and a relevant property to achieve the sustainability on soil management. However, soils are still net exporters of organic matter. One example is the use of wheat straw residue for industrial and energy applications, which has gained attention in the last years. The offfarm use of this abundant and low cost resource should follow sustainability criteria to avoid soil degradation and SOM losses. Straw residue incorporation is recognized as a recommended management practice to control erosion and mitigate CO2 emissions by increasing SOM. The goal of this work was: i) to evaluate the steady-state carbon (C) level in relation to C input a…