Search results for "Size"
showing 10 items of 2718 documents
Mācību sasniegumus ietekmējošie faktori Latvijas vispārizglītojošās skolās
2017
Promocijas darba mērķis ir izpētīt datus par izglītojamo mācību sasniegumiem starptautiski salīdzinošajos izglītības pētījumos, valsts pārbaudes darbos un izglītojamo gada vērtējumiem mācību priekšmetos, sniegt rekomendācijas par iespējamiem Latvijas vispārējās izglītības optimizācijas virzieniem. Promocijas darba rezultātā ir izstrādāti ierosinājumi, kuru īstenošana ļautu paaugstināt izglītojamo mācību sasniegumus vispārējās izglītības posmā. Promocijas darbu veido ievads, sešas savstarpēji saistītas nodaļas par četrām tēmām un nobeigums. Atslēgas vārdi: vispārējā izglītība, izglītības sistēmas optimizācija, mācību sasniegumi, kavējumi, skolas un klases lielums, obligātās izglītības uzsākš…
ESTIMATING SOIL PARTICLE-SIZE DISTRIBUTION FOR SICILIAN SOILS
2009
The soil particle-size distribution (PSD) is commonly used for soil classification and for estimating soil behavior. An accurate mathematical representation of the PSD is required to estimate soil hydraulic properties and to compare texture measurements from different classification systems. The objective of this study was to evaluate the ability of the Haverkamp and Parlange (HP) and Fredlund et al. (F) PSD models to fit 243 measured PSDs from a wide range of 38 005_Bagarello(547)_33 18-11-2009 11:55 Pagina 38 soil textures in Sicily and to test the effect of the number of measured particle diameters on the fitting of the theoretical PSD. For each soil textural class, the best fitting perf…
MVU ekonomiskās izaugsmes noteicēji Vācijā un Latvijā, fokuss uz ražošanas MVU
2021
Šis darbs ir veltīts mazo un vidējo uzņēmumu (MVU) un to izaugsmes faktoru analīzei. Tajā izklāstīti dažādi faktori, kas ietekmē MVU attīstību, kā arī izaicinājumi un perspektīvas, ar ko tie sastopas mūsdienu globalizētajā un digitalizētajā ekonomikā. Darbā plaši iztirzāta MVU būtiskā loma ekonomikas un sociālās dimensijas iekļaujošā izaugsmē. Šajā darbā arī iekļautas dažādas stratēģijas un valsts programmas, kam ir labvēlīgs iespaids uz uzņēmumu produktivitāti un attīstību. Padziļinātas izpratnes radīšanai kā piemērs ir izvēlēts mazo un vidējo uzņēmumu sektors Latvijā un Vācijā, identificējot abu sektoru trūkumus un priekšrocības.
Study of bubble size distribution in bubbling fluidized beds via Digital Image Analysis Technique
2008
Monitoring WWTP performance using size-exclusion chromatography with simultaneous UV and fluorescence detection to track recalcitrant wastewater frac…
2018
A trial monitoring of a typical full-scale municipal WWTP in Central Finland was aimed to explore applicability of high performance liquid chromatography – size exclusion chromatography (HPSEC) with simultaneous UV and fluorescence detection as a tool for advanced routine monitoring of wastewater treatment. High, intermediate, and low molecular weight (MW) fractions of untreated wastewater (influent) and treated wastewater (secondary effluent) were characterized in terms of UV absorbance at 254 nm (UVA254) and specific fluorescence representing tyrosine-like, tryptophan-like, and humic/fulvic-like compounds. The activated sludge treatment removed 97 ± 1% of BOD, 93 ± 2% of COD, 71 ± 7% of D…
Hormone replacement therapy improves contractile function and myonuclear organization of single fibres from postmenopausal monozygotic female twin pa…
2013
Ageing is associated with a decline in muscle mass and strength leading to increased physical dependency in old age. Postmenopausal women experience a greater decline than men of similar age in parallel with the decrease in female sex steroid hormone production. We recruited six monozygous female twin pairs (55–59 years old) where only one twin pair was on hormone replacement therapy (HRT use = 7.8 ± 4.3 years) to investigate the association of HRT with the cytoplasmic volume supported by individual myonuclei (myonuclear domain (MND) size,) together with specific force at the single fibre level. HRT use was associated with a significantly smaller (∼27%; P < 0.05) mean MND size in muscle fib…
Implementation of IT applications in small and middle size enterprises : controlling the critical success factors
2002
Extraordinary Performance of Carbon‐Coated Anatase TiO 2 as Sodium‐Ion Anode
2015
The synthesis of in situ polymer‐functionalized anatase TiO2 particles using an anchoring block copolymer with hydroxamate as coordinating species is reported, which yields nanoparticles (≈11 nm) in multigram scale. Thermal annealing converts the polymer brushes into a uniform and homogeneous carbon coating as proven by high resolution transmission electron microscopy and Raman spectroscopy. The strong impact of particle size as well as carbon coating on the electrochemical performance of anatase TiO2 is demonstrated. Downsizing the particles leads to higher reversible uptake/release of sodium cations per formula unit TiO2 (e.g., 0.72 eq. Na+ (11 nm) vs only 0.56 eq. Na+ (40 nm)) while the …
Bi-2212 and Y123 highly curved single-crystal-like objects: whiskers, bows and ring-like structures
2012
High-temperature superconducting objects of Bi2Sr2CaCu2O8 and Y Ba2Cu3O7 highly curved in the ab-plane, such as curved/kinked whiskers, bows and ring-like structures, were obtained within a solid?liquid?solid (SLS) grass-like growth mechanism. As-grown objects are crystals with three-dimensional epitaxy similar to conventional single crystals: they can be viewed as crystal parts ?cut? from a conventional rectangular crystal. Between our curved objects and conventional crystals, whiskers or thin films there are some differences in the superconducting properties induced only by the shape factors and no new physics is observed. Some details of the growth mechanism are discussed, emphasizing cu…
Population divergence in maternal investment and embryo energy use and allocation suggests adaptive responses to cool climates
2023
1. The thermal sensitivity of early life stages can play a fundamental role in constraining species distributions. For egg-laying ectotherms, cool temperatures often extend development time and exacerbate developmental energy cost. Despite these costs, egg laying is still observed at high latitudes and altitudes. How embryos overcome the developmental constraints posed by cool climates is crucial knowledge for explaining the persistence of oviparous species in such environments and for understanding thermal adaptation more broadly. 2. Here, we studied maternal investment and embryo energy use and allocation in wall lizards spanning altitudinal regions, as potential mechanisms that enable su…