Search results for "Dependence"
showing 10 items of 2462 documents
Observations of Forbush Decreases of cosmic ray electrons and positrons with the Dark Matter Particle Explorer
2021
The Forbush Decrease (FD) represents the rapid decrease of the intensities of charged particles accompanied with the coronal mass ejections (CMEs) or high-speed streams from coronal holes. It has been mainly explored with ground-based neutron monitors network which indirectly measure the integrated intensities of all species of cosmic rays by counting secondary neutrons produced from interaction between atmosphere atoms and cosmic rays. The space-based experiments can resolve the species of particles but the energy ranges are limited by the relative small acceptances except for the most abundant particles like protons and helium. Therefore, the FD of cosmic ray electrons and positrons have …
Perovskite CH3NH3PbI3–XClx Solar Cells. Experimental Study of Initial Degradation Kinetics and Fill Factor Spectral Dependence
2021
The main drawback of the methylammonium lead halide perovskite solar cells is their degradation in ambient atmosphere. To investigate ambient-air-induced cell degradation, spec-tral dependencies of open-circuit voltage (VOC), fill factor (FF) and the power conversion effi-ciency (PCE) have been acquired (for the first time reported in literature). Our custom-made measurement system allowed us to perform measurements of the above-mentioned entities in situ directly in vacuum during and after thermal deposition of the elec-trode. We also studied how these parameters in vacuum changed after cell exposure to ambient air for 85 min (50 nm top electrode) and for 180 min (100 nm top Ag electrode).…
Party Leadership Selection in Latvia: Divergent Practices of Precursory Delegation
2020
The pattern of political competition in Latvia has been notably stable. A majority of right-of-centre parties represent the interests of ethnic Latvians and faces a minority of left-of-centre parties claiming to advocate the interests of East Slavic minorities. However, actors in this pattern have changed notably. Every parliamentary election since the restoration of independence has generated at least one new party represented in the Latvian parliament, with the turnover of members of parliament oscillating between 25 per cent and 60 per cent.
Density-dependent regulation of natural and laboratory rotifer populations
2001
Density-dependent regulation of abundance is fundamentally important in the dynamics of most animal populations. Density effects, however, have rarely been quantified in natural populations, so population models typically have a large uncertainty in their predictions. We used models generated from time series analysis to explore the form and strength of density-dependence in several natural rotifer populations. Population growth rate (r) decreased linearly or non-linearly with increased population density, depending on the rotifer species. Density effects in natural populations reduced r to 0 at densities of 1–101−1 for 8 of the 9 rotifer species investigated. The sensitivities of these spe…
Post‐Soviet Reform in Latvia: Early Progress and Future Prospects
1992
After the rapid and dramatic demise of the Soviet Union in 1991, 15 newly autonomous republics are restructuring their economies after decades of central Communist planning. The three Baltic states of Latvia, Lithuania and Estonia had successful market‐oriented economies during more than two decades of independence between World Wars I and II and were comparatively strong performers within the USSR after being occupied in 1940. A case study of Latvia looks at the historic factors and political issues which are shaping the current reform process. A contrast of state‐run, collective and private enterprises is used to illustrate the rapid changes which now place Latvia at the forefront among p…
"Table 6" of "Transverse momentum of J / psi produced in p Cu, p U, O-16 Cu, O-16 U and S-32 U collisions at 200-GeV per nucleon."
1991
CONTINUUM MUONS ORIGINATE MAINLY FROM VECTOR MESON DECAYS, SEMI-LEPTONIC DECAYS OF D DBAR PAIRS AND FROM DRELL-YAN MECHANISM.
"Table 8" of "Transverse momentum of J / psi produced in p Cu, p U, O-16 Cu, O-16 U and S-32 U collisions at 200-GeV per nucleon."
1991
CONTINUUM MUONS ORIGINATE MAINLY FROM VECTOR MESON DECAYS, SEMI-LEPTONIC DECAYS OF D DBAR PAIRS AND FROM DRELL-YAN MECHANISM.
"Table 4" of "Transverse momentum of J / psi produced in p Cu, p U, O-16 Cu, O-16 U and S-32 U collisions at 200-GeV per nucleon."
1991
CONTINUUM MUONS ORIGINATE MAINLY FROM VECTOR MESON DECAYS, SEMI-LEPTONIC DECAYS OF D DBAR PAIRS AND FROM DRELL-YAN MECHANISM.
"Table 3" of "Heavy flavour decay muon production at forward rapidity in proton--proton collisions at \sqrt(s) = 7 TeV"
2012
pT-differential production cross section of muons from heavy flavour decays, in the rapidity range 2.5
"Table 1" of "Heavy flavour decay muon production at forward rapidity in proton--proton collisions at \sqrt(s) = 7 TeV"
2012
pT-differential production cross section of muons from heavy flavour decays, in the rapidity range 2.5