109 research outputs found
INVESTORSʼ REACTIONS FOR SUSTAINABILITY INDEX INCLUSION – IS CSR A GOOD NEWS?
This article presents the problem of measuring the impact of information disclosure aboutCSR activities on stock performance. The research was performed on two indexes which representPan-European capital market and local Central and Eastern European capital market. Differentmarket characteristics could limit the application of results presented in numerous studiesperformed on well-established markets. The information with relatively strong signal for investoris the inclusion to CSR index. In order to measure the investors’ reaction the event study analysiswas performed. It was proved that the short–term reaction was very similar on each market. Thereaction to announcement of CSR index inclusion was slightly negative, but this effect was offsetby the opposite reaction in the day of inclusion. The total reaction in the seven days event windowwas close to zero. However, the long-term reaction measured in 30 trading days window wasnegative for two markets, but the local market investors show more discontent
Stability Diagram of a Few-Electron Triple Dot
Quantum dots are considered building blocks for future quantum information
circuits. We present here experimental results on a quantum dot circuit
consisting of three quantum dots with controlled electron numbers down to one
per dot and tunable coupling. We experimentally map out for the first time the
stability diagram of the triatomic system and reveal the existence of quadruple
points, a signature of the three dots being in resonance. In their vicinity we
observe a surprising effect, a 'cloning' of charge transfer transitions related
to charge and spin reconfigurations. The experimental results are reproduced by
equivalent circuit analysis and Hubbard models
Landau-Zener-Stuckelberg-Majorana interferometry of a single hole
We perform Landau-Zener-Stuckelberg-Majorana (LZSM) spectroscopy on a system
with strong spin-orbit interaction (SOI), realized as a single hole confined in
a gated double quantum dot. In analogy to the electron systems, at magnetic
field B=0 and high modulation frequencies we observe the photon-assisted
tunneling (PAT) between dots, which smoothly evolves into the typical LZSM
funnel-shaped interference pattern as the frequency is decreased. In contrast
to electrons, the SOI enables an additional, efficient spin-flipping interdot
tunneling channel, introducing a distinct interference pattern at finite B.
Magneto-transport spectra at low-frequency LZSM driving show the two channels
to be equally coherent. High-frequency LZSM driving reveals complex
photon-assisted tunneling pathways, both spin-conserving and spin-flipping,
which form closed loops at critical magnetic fields. In one such loop an
arbitrary hole spin state is inverted, opening the way toward its
all-electrical manipulation.Comment: 6 pages, 4 figures, and supplementary materia
Lung transplantation as a viable option of treatment for pulmonary veno-occlusive disease
Pulmonary veno-occlusive disease (PVOD) is a rare form of pulmonary hypertension caused by alteration of pulmonary veins. Many clinical and hemodynamic similarities to idiopathic pulmonary arterial hypertension (IPAH) may cause diagnostic and therapeutic difficulties. This case report is about a patient with PVOD, whose first symptoms of the disease occurred after infectious mononucleosis. Patient was administered with prostacycline (PGI2) mimetic (Treprostinil), what made qualification process and lung transplantation possible. Despite more and more knowledge about causes, ethiopathogenesis and changes in pulmonary veins on molecular level, lung transplantation is the only successful therapeutic option for patients suffering from PVOD
Retrospective cohort study of patients qualified for lung transplantation due to idiopathic pulmonary fibrosis - single-centre experience
Model for end-stage liver disease (MELD) score among patients qualified for lung transplantation with end-stage lung diseases with particular consideration of median pulmonary artery pressure
Secondary pulmonary hypertension among patients qualified for lung transplantation: single-center study
In pursuit of COVID-19 surgical risk stratification to manage a limited workforce and supplies in minimally invasive surgery
The protective barriers used so far in surgery do not provide adequate protection against SARS-CoV-2 virus, and reinforced protective equipment is needed. The rapid increase in the number of patients and the worldwide panic associated with the increasingly low availability of protective equipment has resulted in a shortage of protective equipment In many hospitals. Appropriatepersonal protective equipment must be provided so that the surgical team proceeding to surgery is not excluded from the further struggle for patients’ health, especially in MIS. Reckless and excessive use of maximum protective equipment may result in a severe shortage of these products when the number of infected person
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