Search results for "hill"
showing 10 items of 369 documents
Heroic memory and polis: Achilles and Athens in Zosimus’ Historia Nova
2013
At the time when most people believe in the intercession of the holy man to save the city from barbarians or natural disasters, heroic memory still seems to be venerated by the last pagans. Two passages from Zosimus’ Historia Nova (IV 18 and V 6) tell us how Achilles saved Athens.The first time, the city was spared the earthquake that devastated much of Greece during the empire of Valens; the second time, the city was preserved from Alaric’ ravages in 396-397, thanks to the supernatural precence of Athena Promachos too. These events, told only by Zosimus, are of great importance in the historian’ view, according to whom the neglect of Roman ancestral religion brought about the decline of th…
Phillip II of Macedon: The First European. Asia and Europe as Political Concepts in Classical Greece
2021
El presente artículo tiene como objetivo analizar la evolución histórica y cultural de Europa y Asia como términos políticos en la Grecia clásica. Para ello, abordaremos fuentes de diversa índole como Esquilo, Heródoto, el escrito hipocrático Aires, aguas y lugares y el orador Isócrates. Partiremos de la equiparación inicial entre Europa (= Grecia) y Asia (= Persia) hasta alcanzar la propuesta de Isócrates de considerar a Filipo como un líder europeo. The aim of this paper is to analyse the historical and cultural evolution of Europe and Asia considered as a political terms in Classical Greece. In order to achieve this objective, we will address several primary sources such as Aeschylus’ Pe…
Forward and backward diffusion approximations for haploid exchangeable population models
2001
Abstract The class of haploid population models with non-overlapping generations and fixed population size N is considered such that the family sizes ν1,…,νN within a generation are exchangeable random variables. A criterion for weak convergence in the Skorohod sense is established for a properly time- and space-scaled process counting the number of descendants forward in time. The generator A of the limit process X is constructed using the joint moments of the offspring variables ν1,…,νN. In particular, the Wright–Fisher diffusion with generator Af(x)= 1 2 x(1−x)f″(x) appears in the limit as the population size N tends to infinity if and only if the condition lim N→∞ E((ν 1 −1) 3 )/(N Var …
La escritura expresiva en la orientación. Una metodología educativa para la construcción del proyecto de vida personal y profesional
2020
La scrittura espressiva adottata a scuola come strumento di autorientamento dell’adolescente di 17-18 anni non sostituisce l’intervento educativo dell’insegnante, piuttosto può considerarsi una tecnica efficace per raccogliere tutte le informazioni necessarie con cui formare, con il consenso dell’alunno e insieme a lui, un quadro esaustivo in cui includere lo stato attuale delle sue competenze, le sue attitudini, i suoi interessi, le sue motivazioni, la sua storia formativa, il suo profilo di personalità, i suoi limiti, nonché i suoi obiettivi e le modalità concrete con cui egli pensa di raggiungerli. Essa è pertanto un metodo educativo con cui gli studenti che si approssimano a svolgere gl…
Slope threshold for overland flow resistance on sandy soils
2021
Recent research on rill flows recognised that an 18% slope can be used to distinguish between ‘gentle’ and ‘steep’ slope cases for the detected differences in hydraulic (flow depth and velocity) and sediment transport variables (flow transport capacity, actual sediment load). The effects of slope on flow velocity, friction factor and transport capacity and their interactions affect process-based erosion modelling. The main aim of this paper is to investigate, for the first time, how slope affects the overland flow resistance on sandy soils, which are characterised by loose particles readily available to be transported and deposited. Using literature measurements carried out in sandy soils f…
Slope threshold in rill flow resistance
2022
The applicability of a theoretical rill flow resistance equation, based on the integration of a power velocity distribution, was tested using measurements carried out in mobile and fixed bed rills, shaped on plots having different slopes (9, 14, 15, 18, 22, 24, 25 and 26%) and soil textures (clay fractions ranging from 32.7% to 73% and silt of 19.9–30.9%), and flume measurements available in the literature. The Darcy–Weisbach friction factor resulted dependent on the slope, Froude number, Reynolds number and clay and silt percentages, used as variables representative of soil transportability and detachability, respectively. This theoretical approach was applied to two different databases di…
Estimating flow resistance in steep slope rills
2021
Recent research recognized that the slope of 18% can be used to distinguish between the ‘gentle slope’ case and that of ‘steep slope’ for the detected differences in hydraulic variables (flow depth, velocity, Reynolds number, Froude number) and those representatives of sediment transport (flow transport capacity, actual sediment load). In this paper, using previous measurements carried out in mobile bed rills and flume experiments characterized by steep slopes (i.e., slope greater than or equal to 18%), a theoretical rill flow resistance equation to estimate the Darcy-Weisbach friction factor is tested. The main aim is to deduce a relationship between the velocity profile parameter Γ, the c…
Investigation of Flow and Heat Transfer in Corrugated-Undulated Plate Heat Exchangers
2000
An experimental and numerical investigation of heat transfer and fluid flow was conducted for corrugated-undulated plate heat exchanger configurations under transitional and weakly turbulent conditions. For a given geometry of the corrugated plates the geometrical characteristics of the undulated plates, the angle formed by the latter with the main flow direction, and the Reynolds number were made to vary. Distributions of the local heat transfer coefficient were obtained by using liquid-crystal thermography, and surface-averaged values were computed; friction coefficients were measured by wall pressure tappings. Overall heat transfer and pressure drop correlations were derived. Three-dimen…
Realistische Abrechnung mit Präexistenz und Reinkarnation. Julius von Heydens Gesprächsnovelle "Das Geheimnis der Reminiszenz"
2019
Heyden's story takes up the belief in reincarnation as an element of German idealism, as well as liberal ideas of social equality to critically disprove both of them.
Neuromuscular mechanics and hopping training in elderly.
2014
Purpose The present study examined the effects of repetitive hopping training on muscle activation profiles and fascicle–tendon interaction in the elderly. Methods 20 physically active elderly men were randomly assigned for training (TG) and control groups (CG). TG performed supervised bilateral short contact hopping training with progressively increasing training volume. Measurements were performed before the training period (BEF) as well as after 2 weeks (2 W) and 11 weeks (11 W) of training. During measurements, the gastrocnemius medialis–muscle (GaM) fascicle and its outer Achilles tendon length changes during hopping were examined by ultrasonography together with electromyographic (EMG…