Search results for "PAV"

Darba stresa saistība ar apreibinošo vielu lietošanu pavāriem

2021

Bakalaura darba mērķis ir noskaidrot, vai pastāv darba stresa saistība ar apreibinošo vielu lietošanu pavāriem. Darba ietvaros tika pētīti un apkopoti tādi zinātniskie raksti un pētījumi, kas pēc savas būtības apskata stresu, darba stresu, stresa pārvarēšanas stratēģijas un alohola lietošanas paradumus, kā arī pavāra profesijas specifiskās īpatnības. Šī bakalaura darba ietvaros tika aptaujāti 60 respondenti, vecumā no 18 līdz 56 gadiem. 30 respondenti bija vīrieši un 26 bija sievietes. Vīriešu grupā vidējais vecums bija 38,8 gadi, bet sievietēm 30,7 gadi. Aptaujai tika izmantoti divi mērinstrumenti: Darba stresoru skalas (JSS - Job Stressor Scales, Paul E. Spector & Jex, 1997) un Alkohola l…

Selective erasure of a fear memory

2009

International audience; Memories are thought to be encoded by sparsely distributed groups of neurons. However, identifying the precise neurons supporting a given memory (the memory trace) has been a long-standing challenge. We have shown previously that lateral amygdala (LA) neurons with increased cyclic adenosine monophosphate response element-binding protein (CREB) are preferentially activated by fear memory expression, which suggests that they are selectively recruited into the memory trace. We used an inducible diphtheria-toxin strategy to specifically ablate these neurons. Selectively deleting neurons overexpressing CREB (but not a similar portion of random LA neurons) after learning b…

Vēsture: Latvijas Universitātes Žurnāls, Nr.11/12

2021

Projekts: Uzņēmuma SIA "Click&Repair" dibināšana

2019

Maģistra darba ideja ir izveidot digitālu platformu mājaslapas un aplikācijas formā, kas nodrošinās vidi apavu, somu un apģērbu remonta pakalpojuma sniedzējiem un to klientiem. Projekta galvenais mērķis ir realizēt ideju, nodibinot uzņēmumu, kas spēs atmaksāt ieguldītos finanšu līdzekļus, gūs peļņu, sabiedrībai nodrošinās kvalitatīvu, ātru un ērtu pakalpojumu, kā arī veicinās kopējās nozares attīstību. Lai sasniegtu projektā noteikto mērķi, darba ietvaros tiek veikta uzņēmuma saimnieciskās darbības uzsākšanai un attīstībai nepieciešamo plānu izstrāde. Gan platformas, gan paša uzņēmums nosaukums – “Click&Repair”. Projekta pirmajā nodaļā ir analizēta biznesa ideja un tās aktualitāte, pamatojo…

Diversification of CYCLOIDEA-like TCP genes in the basal eudicot families Fumariaceae and Papaveraceae s.str.

2006

CYCLOIDEA-like genes belong to the TCP family of transcriptional regulators and have been shown to control different aspects of shoot development in various angiosperm lineages, including flower monosymmetry in asterids and axillary meristem growth in monocots. Genes related to the CYC gene from ANTIRRHINUM show independent duplications in both asterids and rosids. However, it remains unclear to what extent this affected the evolution of flower symmetry and shoot branching in these and other eudicot lineages. Here, we show that CYC-like genes have also undergone duplications in two related Ranunculales families, Fumariaceae and Papaveraceae s.str. These families exhibit morphological divers…

An ANN model to correlate roughness and structural performance in asphalt pavements

2017

Abstract In this paper, using a large database from the Long Term Pavement Performance program, the authors developed an Artificial Neural Network (ANN) to estimate the structural performance of asphalt pavements from roughness data. Considering advantages of modern high-performance survey devices in the acquisition of road pavement functional parameters, it would be of practical significance if the structural state of a pavement could be estimated from its functional conditions. To differentiate various road section conditions, several significant input parameters, related to traffic, weather, and structural aspects, have been included in the analysis. The results are very interesting and …

Antimuscarinic action of quinidine on the heart? A study in myocardial preparations from cat hearts

1984

Quinidine exerts anticholinergic effects which have been ascribed to atropine-like properties of the drug. We have examined the effects of acetylcholine on the force of contraction in isolated heart muscle preparations from cats and compared the inhibitory effects of atropine with those of quinidine. The effects of acetylcholine were antagonized competitively in the presence of atropine. The Schild-plot yielded a straight line; the slope was not significantly different from unity. In the presence of quinidine, the concentration-response curve of acetylcholine was shifted to the right as with atropine, however, the Schild-plot yielded a regression line which was not linear; the slope was sta…

Automation of Optimized Gabor Filter Parameter Selection for Road Cracks Detection

2016

International audience; Automated systems for road crack detection are extremely important in road maintenance for vehicle safety and traveler's comfort. Emerging cracks in roads need to be detected and accordingly repaired as early as possible to avoid further damage thus reducing rehabilitation cost. In this paper, a robust method for Gabor filter parameters optimization for automatic road crack detection is discussed. Gabor filter has been used in previous literature for similar applications. However, there is a need for automatic selection of optimized Gabor filter parameters due to variation in texture of roads and cracks. The problem of change of background, which in fact is road text…

Optimization of the Mix-Design System for the Sub-ballast Railroad

2017

Bituminous sub-ballast is an alternative solution to the unbound granular sub-ballast used in the railway track due to several benefits that it can provide. Indeed, it contributes to maintain the moisture content in the subgrade unchanged during all year. This decreases the subgrade deterioration process. Moreover, the presence of bituminous sub-ballast can also reduce vertical stiffness variations on the track; it can have a positive effect in the maintenance needs at transition sections (bridge-embankment) and in the attenuation of the vibrations induced by the rail traffic. Despite the importance of the presence of the bituminous sub-ballast to conceive the construction and/or rehabilita…

Food resource partitioning between two sympatric temperate wrasses

2017

The present study analysed two sympatric wrasses, Thalassoma pavo and Coris julis, with similar sizes and morphologies, that are widespread in the reef habitats of the Mediterranean and the eastern Atlantic coast. Ocean warming has induced the northward movement of T. pavo, whereas C. julis has been moving to deeper habitats. In addition, under conditions of high slope of the sea bottom, T. pavo occupies shallow habitats and C. julis is in greater abundance in deeper habitats. By investigating stomach contents and prey availability in the benthos, we assessed whether the two wrasses exploit food resources by choosing different prey within the same habitat both under co-existence and segreg…