105 research outputs found
Design and Research of Electron Cyclotron Resonance Heating and Current Dive System on HL-2M Tokamak
A research has been conducted to develop an 8MW electron cyclotron resonance heating and current drive (ECRH/ECCD) system on HL-2M tokamak. The ECRH system compromise eight 1MW gyrotrons, eight evacuated transmission lines and three launchers. The main purpose of the ECRH system was to suppress the neo-classical tearing modes and control the plasma profile. This paper presents an overview of the design and studies performed in this framework. Some primary test results of the critical components have been released in this paper, e.g. polarizers, power monitor and fast steering launchers
RNA-seq analysis and compound screening highlight multiple signalling pathways regulating secondary cell death after acute CNS injury in vivo
Role of tumor size in the pre-operative management of rectal cancer patients
Clinical management of rectal cancer patients relies on pre-operative staging. Studies however continue to report moderate degrees of over/understaging as well as inter-observer variability. The aim of this study was to determine the sensitivity, specificity and accuracy of tumor size for predicting T and N stages in pre-operatively untreated rectal cancers
Mitotic rates in infant mouse livers following oral administration of diethylnitrosamine or its precursors. Abstr.
�ber Eisen(III)-Komplexe mit Phenolen. I. Reaktion zwischen Eisen(III)-Ionen und Monophenolderivaten
Faster Isogeny-Based Compressed Key Agreement
Supersingular isogeny-based cryptography is one of the more recent families of post-quantum proposals. An interesting feature is the comparatively low bandwidth occupation in key agreement protocols, which stems from the possibility of key compression. However, compression and decompression introduce a significant overhead to the overall processing cost despite recent progress. In this paper we address the main processing bottlenecks involved in key compression and decompression, and suggest substantial improvements for each of them. Some of our techniques may have an independent interest for other, more conventional areas of elliptic curve cryptography as well
Metabolic Incorporation of Azide Functionality into Cellular RNA
Real-time tracking of RNA expression can provide insight into the mechanisms used to generate cellular diversity, as well as help determine the underlying causes of disease. Here we present the exploration of azide-modified nucleoside analogues and their ability to be metabolically incorporated into cellular RNA. We report robust incorporation of adenosine analogues bearing azide handles at both the 2′- and N6-positions; 5-methylazidouridine was not incorporated into cellular RNA. We further demonstrate selectivity of our adenosine analogues for transcription and polyadenylation. We predict that azidonucleosides will find widespread utility in examining RNA functions inside living cells, as well as in more complex systems such as tissues and living animals
Controlling Exciton/Exciton Recombination in 2‑D Perovskite Using Exciton–Polariton Coupling
In this paper, we
demonstrate that exciton/exciton annihilation
in the 2D perovskite (PEA)2PbI4 (PEPI)a
major loss mechanism in solar cells and light-emitting diodes, can
be controlled through coupling of excitons with cavity polaritons.
We study the excited state dynamics using time-resolved transient
absorption spectroscopy and show that the system can be tuned through
a strong coupling regime by varying the cavity width through the PEPI
layer thickness. Remarkably, strong coupling occurs even when the
cavity quality factor remains poor, providing easy optical access.
We demonstrate that the observed derivative-like transient absorption
spectra can be modeled using a time-dependent Rabi splitting that
occurs because of transient bleaching of the excitonic states. When
PEPI is strongly coupled to the cavity, the exciton/exciton annihilation
rate is suppressed by 1 order of magnitude. A model that relies on
the partly photonic character of polaritons explains the results as
a function of detuning
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