51 research outputs found
Koncepcja ideowo-artystyczna zdjęć do filmu Tam i z powrotem. Opis autorski
.Koncepcja ideowo-artystyczna zdjęć do filmu Tam i z powrotem. Opis autorsk
Selected methods for the early diagnostics of oral malignant lesions – a literature review
Early diagnostics of oral cancerous lesions plays a crucial role in the process of treatment and evaluation of the patient's chances for recovery. The article presents new techniques of identifying and detecting abnormal lesions within oral mucosa, such as oral lumenoscopy (ViziLite), TBlue (toluidine blue marking system), VELscope screening system, OralCDx and the brush biopsy. Their application does not allow a definite diagnosis, nor does it replace biopsy or histopathologic assessment, but it permits a more accurate examination of the oral cavity, as well as oral lesion detection at the early stage of progression
Magnetization dynamics down to zero field in dilute (Cd,Mn)Te quantum wells
The evolution of the magnetization in (Cd,Mn)Te quantum wells after a short
pulse of magnetic field was determined from the giant Zeeman shift of
spectroscopic lines. The dynamics in absence of magnetic field was found to be
up to three orders of magnitude faster than that at 1 T. Hyperfine interaction
and strain are mainly responsible for the fast decay. The influence of a hole
gas is clearly visible: at zero field anisotropic holes stabilize the system of
Mn ions, while in a magnetic field of 1 T they are known to speed up the decay
by opening an additional relaxation channel
Towards Exascale Computing Architecture and Its Prototype: Services and Infrastructure
This paper presents the design and implementation of a scalable compute platform for processing large data sets in the scope of the EU H2020 project PROCESS. We are presenting requirements of the platform, related works, infrastructure with focus on the compute components and finally results of our work
Stark Spectroscopy and Radiative Lifetimes in Single Self-Assembled CdTe Quantum Dots
We present studies on Coulomb interactions in single self-assembled CdTe
quantum dots. We use a field effect structure to tune the charge state of the
dot and investigate the impact of the charge state on carrier wave functions.
The analysis of the quantum confined Stark shifts of four excitonic complexes
allows us to conclude that the hole wave function is softer than electron wave
function, i. e. it is subject to stronger modifications upon changing of the
dot charge state. These conclusions are corroborated by time-resolved
photoluminescence studies of recombination lifetimes of different excitonic
complexes. We find that the lifetimes are notably shorter than expected for
strong confinement and result from a relatively shallow potential in the
valence band. This weak confinement facilitates strong hole wave function
redistributions. We analyze spectroscopic shifts of the observed excitonic
complexes and find the same sequence of transitions for all studied dots. We
conclude that the universality of spectroscopic shifts is due to the role of
Coulomb correlations stemming from strong configuration mixing in the valence
band.Comment: sent to Physical Review
Serum metabolomics approach to monitor the changes in metabolite profiles following renal transplantation
Systemic metabolic changes after renal transplantation reflect the key processes that are related to graft accommodation. In order to describe and better understand these changes, the 1HNMR based metabolomics approach was used. The changes of 47 metabolites in the serum samples of 19 individuals were interpreted over time with respect to their levels prior to transplantation. Considering the specific repeated measures design of the experiments, data analysis was mainly focused on the multiple analyses of variance (ANOVA) methods such as ANOVA simultaneous component analysis and ANOVA-target projection. We also propose here the combined use of ANOVA and classification and regression trees (ANOVA-CART) under the assumption that a small set of metabolites the binary splits on which may better describe the graft accommodation processes over time. This assumption is very important for developing a medical protocol for evaluating a patient’s health state. The results showed that besides creatinine, which is routinely used to monitor renal activity, the changes in levels of hippurate, mannitol and alanine may be associated with the changes in renal function during the post-transplantation recovery period. Specifically, the level of hippurate (or histidine) is more sensitive to any short-term changes in renal activity than creatinine
3D Topological Semimetal Phases of Strained -Sn on Insulating Substrate
-Sn is an elemental topological material, whose topological phases
can be tuned by strain and magnetic field. Such tunability offers a substantial
potential for topological electronics. However, InSb substrates, commonly used
to stabilize -Sn allotrope, suffer from parallel conduction,
restricting transport investigations and potential applications. Here, the
successful MBE growth of high-quality -Sn layers on insulating, hybrid
CdTe/GaAs(001) substrates, with bulk electron mobility approaching 20000
cmVs is reported. The electronic properties of the samples
are systematically investigated by independent complementary techniques,
enabling thorough characterization of the 3D Dirac (DSM) and Weyl (WSM)
semimetal phases induced by the strains and magnetic field, respectively.
Magneto-optical experiments, corroborated with band structure modeling, provide
an exhaustive description of the bulk states in the DSM phase. The modeled
electronic structure is directly observed in angle-resolved photoemission
spectroscopy, which reveals linearly dispersing bands near the Fermi level. The
first detailed study of negative longitudinal magnetoresistance relates this
effect to the chiral anomaly and, consequently, to the presence of WSM.
Observation of the Berry phase in Shubnikov-de Haas oscillations agrees
with the topologically non-trivial nature of the investigated samples. Our
findings establish -Sn as an attractive topological material for
exploring relativistic physics and future applications.Comment: Main text: 35 pages, 7 figures; Supplementary Materials: 22 pages, 12
figure
Wspólne stanowisko kardiologiczno-stomatologiczne dotyczące postępowania u pacjentów leczonych przeciwzakrzepowo poddawanych zabiegom stomatologicznym
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