46 research outputs found
Medical Radioisotopes Produced with Cyclotron Beams in Warsaw
The various production routes of the prospective medical radioisotopes 43Sc, 44gSc, 44mSc, 47Sc,
44Ti/44gSc, 99mTc, 72Se/72As and 211At were investigated by a team from the Heavy Ion Laboratory,
University of Warsaw (HIL-UW), the University of Silesia (US) and the National Centre for
Nuclear Research (NCNR). Three cyclotrons were employed: the K=160 heavy-ion cyclotron with
an internal 32 MeV alpha particle beam and the p/d PETtrace medical cyclotron at HIL and the C30
proton cyclotron at NCNR in Świerk, near Warsaw. The Thick Target Yields, activity at the End of
Bombardment (EOB) and the impurities produced in addition to the main isotope are reported. The
possible medical applications of these radioisotopes are briefly discussed
Influence of Shear-Thinning Rheology on the Mixing Dynamics in Taylor-Couette Flow
Non‐Newtonian rheology can have a significant effect on mixing efficiency, which remains poorly understood. The effect of shear‐thinning rheology in a Taylor‐Couette reactor is studied using a combination of particle image velocimetry and flow visualization. Shear‐thinning is found to alter the critical Reynolds numbers for the formation of Taylor vortices and the higher‐order wavy instability, and is associated with an increase in the axial wavelength. Strong shear‐thinning and weak viscoelasticity can also lead to sudden transitions in wavelength as the Reynolds number is varied. Finally, it is shown that shear‐thinning causes an increase in the mixing time within vortices, due to a reduction in their circulation, but enhances the axial dispersion of fluid in the reactor
From Cadomian arc to Ordovician passive margin: geochemical records preserved in metasedimentary successions of the Orlica-Śnieżnik Dome in SW Poland
Analysis of PID type ANFC with Petri Transition Layer for linear permanent magnet motor control
Pierwsza część artykułu jest częścią teoretyczną. Opisano w niej zasadę działania
rozważanego Adaptacyjnego Regulatora Neuronowo-Rozmytego (ARN-R) z Warstwą
Tranzycji Petriego (WTP). Przeanalizowano wpływ WTP na działanie i złożoność
obliczeniową algorytmu, a także rozważania na temat stabilności i zbieżności algorytmu.
W części drugiej – eksperymentalnej, po krótce opisano obiekt badawczy w postaci
silnika liniowego zasilanego z falownika. Następnie przeanalizowano wyniki uzyskane
w trakcie badań eksperymentalnych. W końcowej części przedstawiono wnioski płynące
z przeprowadzonych badań.The first part of the paper is theoretical. It describes operation principle of an
Adaptive Neuro Fuzzy Controller (ANFC) with Petri Transition Layer (PTL). The
influence of PTL on performance and numerical complexity of the algorithm is
analyzed. Also discussion on algorithm stability and convergence condition has been
made. Second part is experimental. The object consisting of linear permanent magnet
motor with inverter has been described. Afterwards experimental results have been
analyzed. Eventually summary and conclusions have been presented
The CΣ State of KLi Studied by Polarisation Labelling Spectroscopy Technique
The polarisation labelling spectroscopy method is applied to study the CΣ← X Σ band system of the KLi molecule. Rotationally resolved polarisation spectra are observed in the spectral range of 17150-20350 cm. A set of Dunham coefficients describes the CΣ state to 95% of its potential well depth, and the potential curve is constructed by the Rydberg-Klein-Rees procedure. The molecular parameters deduced from this work are compared with theoretical calculations
Molecular modelling techniques in environmental research
Over the last few decades significant increase in computational methods (in silico) was annotated. Novel methods have been developed and applied for hypothesis improvement and testing in regions of industrial, pharmaceutical and environmental research. The term in silico methods include variety of approaches. Considerable attention has been attracted to databases, data analysis tools, quantitative structure-activity relationships (QSAR), pharmacophore models, molecular docking and dynamics, pharmacokinetics and other molecular modelling techniques. In silico methods are often accompanied by experimental data, both to create the model and to test it. Such models are frequently used in the discovery and optimization of novel molecules with expected affinity to a target, the estimation of absorption, distribution, metabolism, excretion and toxicity properties as well as physicochemical characterization. The review summarizes briefly the applications of most common molecular modelling techniques and evaluates their application in environmental research. Additionally, this study considers computer aided methods as potential and complex tools that may serve as valuable partnership with wet-lab experiments and may provide a rational aid to minimize the cost and time of research
Molecular modelling techniques in environmental research
Over the last few decades significant increase in computational methods (in silico) was annotated. Novel methods have been developed and applied for hypothesis improvement and testing in regions of industrial, pharmaceutical and environmental research. The term in silico methods include variety of approaches. Considerable attention has been attracted to databases, data analysis tools, quantitative structure-activity relationships (QSAR), pharmacophore models, molecular docking and dynamics, pharmacokinetics and other molecular modelling techniques. In silico methods are often accompanied by experimental data, both to create the model and to test it. Such models are frequently used in the discovery and optimization of novel molecules with expected affinity to a target, the estimation of absorption, distribution, metabolism, excretion and toxicity properties as well as physicochemical characterization. The review summarizes briefly the applications of most common molecular modelling techniques and evaluates their application in environmental research. Additionally, this study considers computer aided methods as potential and complex tools that may serve as valuable partnership with wet-lab experiments and may provide a rational aid to minimize the cost and time of research