Search results for " MIR"

An Improved Double-Pulse Non-Normal Incidence Pumping Geometry for Transient Collisionally Excited Soft X-Ray Lasers

2009

An optimized pumping geometry for transient collisionally excited soft X-ray lasers is presented, similar to the geometry proposed by [1]. In contrast to usual approaches, where a nanosecond pre-pulse is assumed to provide the optimal plasma preparation and a picosecond pulse performs the final heating- and excitation process, two pulses of equal duration in the range around 10 picoseconds are applied. Both pulses are produced in the front end of the CPA pump laser. They are focused onto the target with the same spherical mirror under non-normal incidence geometry, optimized for efficient traveling wave excitation for the main-pulse. A first experiment was performed on Ni-like palladium (14…

Background Rejection of Charged Particles in the Simbol-X Telescope: Preliminary Study of Protons Scattering

2009

X-ray telescopes equipped with focusing optics in high eccentric orbit, as e.g. Newton-XMM and Chandra, showed a degradation of the detector performance and an important increase of the noise due to soft protons with energy between a few tens of keV and a few MeV, that are focused on the detector through the mirror module. It should be noted that the focusing of the protons by Wolter optics was an unexpected phenomenon. In Simbol-X a magnetic diverter will be implemented to deflect protons, in order to reduce the flux of charged particles impinging upon the focal plane. Obviously the design of the diverter should take into consideration the protons distribution at the exit of the mirror mod…

Super-Allowed β Decay of23Mg Studied with a High-Precision Germanium Detector

2015

Determinationes magistrales contra conclusiones Johannis Pici Mirandulani

1489

Exploring the miRNA-mediated response to combined stresses in melon plants

2021

AbstractClimate change has been associated with a higher incidence of combined adverse environmental conditions that can promote a significant decrease in crop productivity. However, knowledge on how a combination of stresses might affect plant development is still scarce. MicroRNAs (miRNAs) have been proposed as potential targets for improving crop-productivity. Here, we have combined deep-sequencing, computational characterization of responsive miRNAs and validation of their regulatory role in a comprehensive analysis of melon’s response to several combinations of four stresses (cold, salinity, short day, and infection with a fungus). Twenty-two miRNA families responding to double and/or …

Antoniego Zabłockiego relacja o pobycie Katarzyny II i Józefa II w Chersoniu i na Krymie w roku 1787

2022

From July 1784 to mid-1792, a Polish trade and diplomatic post operated in Kherson (until the spring of 1788), and then in Mirgorod, in the Black Sea territories of the Russian Empire. From mid-1784 until the end of 1791, Antoni Zabłocki, a former soldier of the Crown Army, the Bar Confederate, and an exile in Russia, was the head of the facility, and from the summer-autumn 1786, the consul. He did not have any diplomatic preparation, and his qualifications were limited to the knowledge of the Russian language and the realities of social and economic life in the tsarist state, as well as to close contacts with the surroundings of King Stanisław August. This secured him a job as a royal agen…

P2.01-017 Circulating miRNAs in Lung Cancer Are Associated to Pro-Tumorigenic and Immunosuppressive Microenvironment

2017

Zvaigžņotā Debess: 2011/12, Ziema (214)

2011

Saturs: Gamma staru astronomijas problēmas ; Apollo-14 Mēness ekspedīcija ; A.Laure. Protoplanetāro miglāju stadija zvaigžņu evolūcijā ; A.A. Jaunumi īsumā: Oglekļa zvaigzne un rentgenstaru avots ; A.Alksnis. Heršels ielūkojas Miras galvā ; D.Docenko. Jauns dziļš debess apskats WiggleZ ir pabeigts: gaidām rezultātus ; A.A. Jaunumi īsumā: Pundurplanēta Erīda ir precīzi izmērīta. Atvērto durvju dienā Garhingā... ; M.Gertāns. Iepazīstot Kenedija kosmosa centru un atvadoties no Space Shuttle ; J.Dambītis. Ievērojams Latvijas matemātiķis – docents Nikolajs Brāzma (1913-1966) ; J.Jansons. Fiziķu centieni 1950.-1960. gados atgriezt fundamentālo zinātni Universitātē ; V.Fļorovs, A.Cēbers, D.Bočarov…

Dynamics of spontaneous emission in a single-end photonic waveguide

2012

We investigate the spontaneous emission of a two-level system, e.g. an atom or atomlike object, coupled to a single-end, i.e., semi-infinite, one-dimensional photonic waveguide such that one end behaves as a perfect mirror while light can pass through the opposite end with no back-reflection. Through a quantum microscopic model we show that such geometry can cause non-exponential and long-lived atomic decay. Under suitable conditions, a bound atom-photon stationary state appears in the atom-mirror interspace so as to trap a considerable amount of initial atomic excitation. Yet, this can be released by applying an atomic frequency shift causing a revival of photon emission. The resilience of…

Rains of solitons in a figure-of-eight passively mode-locked fiber laser

2014

International audience; We report experimental observation of rains of solitons in figure-of-eight fiber laser passively mode-locked through nonlinear optical loop mirror. Soliton pulses are created from an extended noisy background and drift until they reach a condensed phase comprising several tens of aggregated solitons. The observation of this dynamics tends to strengthen the idea of the universality of the collective behavior of solitons.