Results 31 to 40 of about 2,718,600 (295)

Physical Time and Thermal Clocks [PDF]

Foundations of Physics, 2016
In this paper I discuss the concept of time in physics. I consider the thermal time hypothesis and I claim that thermal clocks and atomic clocks measure different physical times, whereby thermal time and relativistic time are not compatible with each other.
openaire   +2 more sources

Determination of cardinal temperatures and thermal time requirement during germination and emergence of chickpea genotypes (Cicer arietinum L.) [PDF]

پژوهش‌های حبوبات ایران, 2012
Determination of cardinal temperatures during seed germination and emergence as well as the thermal time requirement for each stage is essential in crop management and modeling of plant growth and development.
Ali Ganjeali, Mehdi Parsa, Reza Amiri-Deh-Ahmadi   +2 more
doaj   +1 more source

Thermal contact: mischief and time scales [PDF]

Journal of Physics A: Mathematical and Theoretical, 2019
We discuss what kind of quantum channels can enable thermalization processes. We show that in order to determine a system's temperature, a thermometer needs to dynamically gain information about the system's local Hamiltonian and not just its state. We illustrate this showing that any temperature measurement protocol that does not resolve the system's ...
Daniel Grimmer, Robert B Mann, Eduardo Martín-Martínez   +2 more
openaire   +3 more sources

Emissão e expansão foliar em três genótipos de tomateiro (Lycopersicon esculentum Mill.) Leaf emergence and expansion in three tomato (Lycopersicon esculentum Mill.) genotypes

Ciência Rural, 2007
O objetivo deste trabalho foi estimar o filocrono na haste principal e em hastes laterais de primeira ordem e estimar a área foliar a partir do número de folhas em três genótipos de tomateiro cultivados em estufa plástica. Um experimento foi conduzido em
Carina Rejane Pivetta, Ivonete Fatima Tazzo, Guilherme Fabiano Maass, Nereu Augusto Streck, Arno Bernardo Heldwein   +4 more
doaj   +1 more source

Thermal Niche for Seed Germination and Species Distribution Modelling of Swietenia macrophylla King (Mahogany) under Climate Change Scenarios

Plants, 2021
Swietenia macrophylla is an economically important tree species propagated by seeds that lose their viability in a short time, making seed germination a key stage for the species recruitment.
Salvador Sampayo-Maldonado, Cesar A. Ordoñez-Salanueva, Efisio Mattana, Michael Way, Elena Castillo-Lorenzo, Patricia D. Dávila-Aranda, Rafael Lira-Saade, Oswaldo Téllez-Valdés, Norma I. Rodriguez-Arevalo, Tiziana Ulian, Cesar M. Flores-Ortíz   +10 more
doaj   +1 more source

Growing Degree Day Climatology in Aydın, Türkiye

Turkish Journal of Agriculture: Food Science and Technology
Plants need to accumalate heat to complete a particular or whole growth period. This accumalation depends on temperature thresholds above or below which plant growth ceases, and on air temperature.
Ercan Yeşilırmak
doaj   +1 more source

Temperatura base para emissão de folhas e nós, filocrono e plastocrono das plantas daninhas papuã e corriola Base temperature for leaf and node appearance, phyllochron and plastochron in the weeds Alexander grass and Morning glory

Ciência Rural, 2008
O papuã (Brachiaria plantaginea) e a corriola (Ipomoea triloba) são importantes plantas daninhas de culturas anuais. O filocrono (intervalo de tempo entre o aparecimento de duas folhas sucessivas) e o plastocrono (intervalo de tempo entre o aparecimento ...
Gizelli Moiano de Paula, Nereu Augusto Streck   +1 more
doaj   +1 more source

Thermal conductivity of hot pionic medium due to pion self-energy for $\pi\sigma$ and $\pi\rho$ loops

, 2015
The thermal conductivity of pionic medium has been evaluated with the help of its standard expression from the relaxation time approximation, where inverse of pion relaxation time or pion thermal width has been obtained from the imaginary part of pion ...
Ghosh, Sabyasachi
core   +1 more source

Time-dependent thermoelectric transport for nanoscale thermal machines

, 2016
We analyze an electronic nanoscale thermal machine driven by time-dependent environment: besides bias and gate voltage variations, we consider also the less prevailing time modulation of the couplings between leads and dot.
Daré, A. -M., Lombardo, P.
core   +3 more sources

Functional Traits, Morphology, and Herbage Production of Vernalised and Non-Vernalised Chicory cv. Choice (Cichorium intybus L.) in Response to Defoliation Frequency and Height

Plants, 2020
Chicory (Cichorium intybus L.) used in pastoral systems has the attributes required of a forage species to reduce animal urinary nitrogen loading to soil, increase milk production, and enhance milk fatty acid profile to improve pastoral farm systems for ...
Mancoba C. Mangwe, Racheal H. Bryant, Cristian A. Moreno García, Thomas M.R. Maxwell, Pablo Gregorini   +4 more
doaj   +1 more source