Lifetimes and Gj factors in excited states of chromium. Hyperfine structure of Cr53

Electronic and nuclear properties of excited chromium isotopes using level crossing and double resonance spectroscopy technique

CLUSTERS IN THE THEORY AND PRACTICE OF LOCAL AND REGIONAL POLICY

The notion of clusters, as a tool of the local and regional development policy in Poland is a completely new one in our economic reality: it is only recently that it has raised considerable interest on the part of both economic theory and practice. In order that clusters could provide an effective tool of policy that serves the purpose of development and increase the level of competitiveness of the economy, it is indispensable to provide a precise definition of the term. However, defining it is far from an easy task, yet indispensable as regards cognitive procedures exerting a strong influence on the ąuality of scientific knowledge created by researchers of a given phenomenon. Moreover, defining is particularly important if its goal is description or analysis of a given phenomenon since precision in doing so facilitates establishing a proper scope of research and helps exclude from it immaterial features or elements.   &nbsp

Astrophysical Reaction Rates for 10^{10}B(p,α\alpha)7^{7}Be and 11^{11}B(p,α\alpha)8^{8}Be From a Direct Model

The reactions $^{10}$B(p,$\alpha$)$^{7}$Be and $^{11}$B(p,$\alpha$)$^{8}$Be are studied at thermonuclear energies using DWBA calculations. For both reactions, transitions to the ground states and first excited states are investigated. In the case of $^{10}$B(p,$\alpha$)$^{7}$Be, a resonance at $E_{Res}=10$ keV can be consistently described in the potential model, thereby allowing the extension of the astrophysical $S$-factor data to very low energies. Strong interference with a resonance at about $E_{Res}=550$ keV require a Breit-Wigner description of that resonance and the introduction of an interference term for the reaction $^{10}$B(p,$\alpha_1$)$^{7}$Be$^*$. Two isospin $T=1$ resonances (at $E_{Res1}=149$ keV and $E_{Res2}=619$ keV) observed in the $^{11}$B+p reactions necessitate Breit-Wigner resonance and interference terms to fit the data of the $^{11}$B(p,$\alpha$)$^{8}$Be reaction. $S$-factors and thermonuclear reaction rates are given for each reaction. The present calculation is the first consistent parametrization for the transition to the ground states and first excited states at low energies.Comment: 27 pages, 5 Postscript figures, uses RevTex and aps.sty; preprint also available at http://quasar.physik.unibas.ch/ Phys. Rev. C, in pres

Małe i średnie przedsiębiorstwa jako forma przedsiębiorczości na obszarach wiejskich

Na obszarach wiejskich mamy obecnie do czynienia z nadwyżką siły roboczej w rolnictwie i brakiem miejsc pracy dla ludności bezrolnej. Zmniejszająca się rola rolnictwa i korzyści z produkcji rolnej, jako podstawowego źródła utrzymania ludności wiejskiej, stwarzają konieczność uzupełniania dochodów z innej działalności. Podejmowanie działalności w sektorze małych i średnich przedsiębiorstw może w znacznym stopniu te braki uzupełnić. Małe i średnie przedsiębiorstwa mogą być traktowane jako przejaw przedsiębiorczości na obszarach wiejskich. Celem opracowania jest wskazanie roli i znaczenia małych i średnich przedsiębiorstw w aktywizacji obszarów wiejskich. W opracowaniu wykorzystano dostępny materiał statystyczny GUS, zawarty w publikacjach dotyczących obszarów wiejskich w Polsce oraz literaturę przedmiotu

Soil heterogeneity and the challenge of identifying a trajectory of soil properties development at a mine rehabilitated site

Rehabilitation following open-cast mining aims to build a long-term functional and sustainable soil cover for a stable landscape development. The objective of this study was to assess changes in soil recovery of rehabilitation performed at different times (1980, 1998, 2009, 2016, 2017) measured as soil hydraulic and mechanical properties (shear stress) at an open-cast Yallourn mine site in south-east Australia (Victoria) in 2021. Soil hydraulic properties (SHP) were determined using the extended evaporation method and the water retention and hydraulic conductivity curves were fitted using the van Genuchten-Mualem model. The vane shear tests were performed at two depths (0–8 and 10–18 cm) combined with soil water content measurements. The results of the SHP showed a shift in the soil water retention curve when comparing 1980 and 2017 sites. While the saturated water content i.e., total porosity was the same, the saturated hydraulic conductivity (Ks) decreased from 36.7 to 1.02 cm da

Rozwijanie kompetencji wychowawczych nauczyciela. Drogowskazy

Nauczyciel jako osoba znacząca towarzyszy uczniowi i wspomaga jego rozwój – wzmacnia wiarę we własne możliwości, buduje poczucie własnej wartości, stawia przed nim wyzwania rozwojowe, ale też zaspokaja jego potrzeby rozwojowe.Myśląc o rozwoju osobistym nauczyciela, przekazujemy Państwu podręcznik, który składa się z pięciu części: 1. Coaching jako metoda rozwoju kompetencji wychowawczych nauczycieli; 2. Doświadczenia w procesie wspierania pracy wychowawczej nauczycieli metodami coachingowymi w obszarze zarządzania zachowaniem uczniów; 3 Autocoaching (selfcoaching); 4. Rozwój kompetencji osobistych i wychowawczych nauczyciela; 5. Drogowskazy. Pragniemy, aby nasza książka posłużyła wychowawcom jako ekwipunek – umieściłyśmy tu mapy z wyraźnie zaznaczonym kierunkiem podróży, a także bogaty prowiant, który pomaga podróżnikom przebyć ścieżki ich osobistego rozwoju

Impact of bare fallow management on soil carbon storage and aggregates across a rock fragment gradient

Background: Our understanding of C storage in soils lacks insights investigating organic matter (OM) depletion, often studied in bare fallow systems. The content of coarse rock fragments is often excluded, whereas it may affect C storage. Aims: We aim to contribute to a better understanding of the impact of bare fallow on C storage mechanisms in the soil as influenced by its coarse rock fragment contents. We investigated whether bare fallow induced a depletion of C in OM fractions and analyzed to which extent this affected soil aggregate size distribution and the C loading of the clay‐sized fraction. Methods: A comparison of 14 years bare fallow management with adjacent cropped soils located in Selhausen (Germany) provided a gradient of coarse rock fragments of 34%–71%, from which sites with three different fine earth (FE) contents were compared. Across the FE gradient, we isolated particulate OM and mineral‐associated OM fractions, obtained microaggregate and macroaggregate size fractions, and quantified the C loading. Results: Bare fallow management induced an OM depletion at lower contents of FE. There, the management influence was more concentrated onto less FE volume. The contribution of both particulate and mineral‐associated OM fractions to the C in the low‐FE soils decreased. The C loading increased under bare fallow, compared to cropped soil. In the low‐FE soil, we also found less macroaggregates, whereas the C content decreased in some microaggregate size fractions. Conclusions: A high content of coarse rock fragments can enhance OM depletion decreasing mineral‐associated and particulate C under bare fallow