Search results for "sun"
showing 10 items of 935 documents
Sunnuntaikahveja ja asumisdemokratiaa : Kortepohjan ylioppilaskylä opiskelija-asuinyhteisönä vuosina 1968-1988
2004
SCOPE-Based Emulators for Fast Generation of Synthetic Canopy Reflectance and Sun-Induced Fluorescence Spectra
2017
Progress in advanced radiative transfer models (RTMs) led to an improved understanding of reflectance (R) and sun-induced chlorophyll fluorescence (SIF) emission throughout the leaf and canopy. Among advanced canopy RTMs that have been recently modified to deliver SIF spectral outputs are the energy balance model SCOPE and the 3D models DART and FLIGHT. The downside of these RTMs is that they are computationally expensive, which makes them impractical in routine processing, such as scene generation and retrieval applications. To bypass their computational burden, a computationally effective technique has been proposed by only using a limited number of model runs, called emulation. The idea …
Impact of Structural, Photochemical and Instrumental Effects on Leaf and Canopy Reflectance Variability in the 500–600 nm Range
2021
Current rapid technological improvement in optical radiometric instrumentation provides an opportunity to develop innovative measurements protocols where the remote quantification of the plant physiological status can be determined with higher accuracy. In this study, the leaf and canopy reflectance variability in the PRI spectral region (i.e., 500–600 nm) is quantified using different laboratory protocols that consider both instrumental and experimental set-up aspects, as well as canopy structural effects and vegetation photoprotection dynamics. First, we studied how an incorrect characterization of the at-target incoming radiance translated into an erroneous vegetation reflectance spectru…
Wokół problemu wznowienia obrad IV Forum Polsko - Niemieckiego w listopadzie 1985 roku
2018
Forum polsko - niemieckie powołane do życia w 1976 roku stało się płaszczyzną rozmów i konsultacji bilateralnych. Po wprowadzeniu stanu wojennego jego prace zawieszono. Z uwagi na znaczenie Forum podjęto, zarówno w PRL, jak i w RFN, wiele działań mających na celu zniwelowanie niekorzystnych wypowiedzi stojących na przeszkodzie przywróceniu jego prac. Dotyczyło to szczególnie wypowiedzi polityków chadeckich w sp[rawie granicy polsko - niemieckiej i mniejszości niemieckiej w Polsce czy braku zgody na udział w Forum przedstawicieli koncesjonowanych polskich związków zawodowych. Natomiast strona polska zgodziła się przede wszystkim na udział w pracach Forum polityków niemieckich związanych z kr…
The structure of coronal plasma in active stellar coronae from density measurements
2005
We have analyzed high-resolution X-ray spectra of a sample of 22 active stars observed with the High Energy Transmission Grating Spectrometer (HETGS) on Chandra in order to investigate their coronal plasma density, using the lines of the He-like ions O VII, Mg XI, and Si XIII. Si XII lines in all stars of the sample axe compatible with the low-density limit (i.e. n(e) = 10(30) erg/s); O VII lines yield much lower densities of a few 10(10) cm(-3). Our results indicate that the "hot" and "cool" plasma resides in physically different structures. Our findings imply remarkably compact coronal structures, especially for the hotter (similar to 7 MK) plasma emitting the Mg xi lines characterized by…
Skin surveillance attitudes and behaviors in relation to skin checks for early signs of skin cancer in a sample of secondary school students and teac…
2012
<p><strong>Background</strong>: Malignant melanoma (MM) can be readily treated in its earliest stages: survival rate, when detected early, is up to 95,0%. This justifies investigations on contributive factors and measures for precocious detection of skin tumors to improve early detection and to increase survival rates. The purpose of this survey was to collect information about knowledge, attitudes and behaviors on prevention in relation to skin checks for early signs of skin cancer on a sample of secondary school students and teachers.</p><p><strong>Methods</strong>: A sample of secondary school students and teachers from Palermo, was recruited usi…
La nuisibilité directe des adventices en grandes cultures : quelles réponses nous apportent les essais désherbages ?
2016
The direct harmful effect of weeds in field crops : what do herbicide trials tell us ? Weeds are plants whose undesirable qualities (“harmfulness") outweigh their desirable qualities (trophic resources). Few studies conclude that weeds do not affect crop yield. However, it is difficult to generalize since weeds compete with crops for resources and these resources are spatially and temporally variable. This study analyzed 110 herbicide trials (untreated vs. treated plots) performed in France from 1993 to 2015 on three major grain crops: winter wheat, winter oilseed rape and sunflower. Significant yield losses were found in 92% of wheat trials (average over all trials: -2.6 t/ha), 51% of wint…
Koeteltavien markkinoiden teoria ja tietokonevarausjärjestelmät : miksi teorian oletukset eivät toteudu Yhdysvaltain sisäisessä reittilentoliikentees…
1997
Suorituskykyindeksin toistettavuuteen vaikuttavia tekijöitä
2015
Marko Heikkinen (2015). Suorituskykyindeksin toistettavuuteen vaikuttavat tekijät. Lii-kuntabiologian laitos, Jyväskylän yliopisto, Pro gradu -tutkielma, 71 s. Tämän tutkimuksen tarkoituksena oli tutkia tavanomaisesta juoksuharjoituksesta lasketta-van suorituskykyindeksin toistettavuutta sekä eri tekijöiden vaikutusta toistettavuuteen. Suorituskykyindeksi perustuu syke-, nopeus- ja maaston korkeustietojen mittaamiseen juoksun aikana. Suorituskykyindeksi on arvio maksimaalisesta teoreettisesta hapenkulu-tuksesta ja säännöllisesti mitattuna se heijastelee harjoittelijan suoritustasoa. Tutkimuksessa käytettiin aineistona erään yrityksen internetpohjaista harjoitustietokantaa, johon palvelun kä…
Guía Práctica de la Educación Digital
2015
En esta guía se ofrece recomendaciones pedagógicas sobre el uso educativo de las tabletas en el aula apoyadas en la investigación del proyecto Samsung Smart School. Por un lado, se busca conocer cómo es la práctica educativa con tabletas en las aulas en el que la aplica el proyecto (cómo es) y, desde esta evidencia, proponer cómo se podría mejorar y potenciar esa práctica a través de una serie de recomendaciones pedagógicas (cómo puede ser). La estructura es: Prólogo de Francesc Pedró (UNESCO) Cap. 1: A modo de introducción Cap. 2: Ecosistema educativo con tecnología: “Samsung Smart School” Cap. 3: “Samsung Smart School” desde la práctica docente Cap. 4: Construcción del aula con tecnología…