Search results for "hill"

Claiming the sea: Bronze Age fortified sites of the north-eastern Adriatic Sea (Cres and Lošinj islands, Croatia)

2017

ABSTRACTMore than 1,000 Bronze and Iron Age hillforts can be listed for the eastern Adriatic region. These constructions left a mark on the landscape which is still perceptible today. In some cases, such as the island of Losinj, this density is challenging to explain: almost thirty hillfort (or simply hilltop) sites were recorded on a rugged island with an area of 74km2. Different factors potentially involved in the formation of this settlement pattern are discussed (territorial control, surveillance, control of maritime networks), only to show that without considering some kind of symbolic display a plausible explanatory model cannot be devised. A new reading of the coastal seascape is pro…

6 Self-organising Maps To Analyse Effects Of Low Intensity Concentric Combined With Blood Flow Restriction

2014

Introduction Self-Organising Maps (SOM) are a type of Artificial Neural Network (ANN) model used to visualise multidimensional data [Kohonen-00]. SOM provides a correspondence between the original N-dimensional space and a twodimensional space [Haykin-08]. In the case presented in this work, this means that two subjects with similar values of the different variables should appear near in the two-dimensional space [Kohonen-00], [Haykin-08]. Method In order to test this method, 15 athletes were selected. Subjects’ measurements were performed in three different periods: before the exercise test, immediately after performing the exercise and twenty-four hours later. The control measures were th…

Stable Automatic Unsupervised Segmentation of Retinal Vessels Using Self-Organizing Maps and a Modified Fuzzy C-Means Clustering

2011

In this paper an automatic unsupervised method for the segmentation of retinal vessels is proposed. Three features are extracted from the tested image. The features are scaled down by a factor of 2 and mapped into a Self-Organizing Map. A modified Fuzzy C-Means clustering algorithm is used to divide the neuron units of the map in 2 classes. The entire image is again input for the Self-Organizing Map and the class of each pixel will be the class of its best matching unit in the Self-Organizing Map. Finally, the vessel network is post-processed using a hill climbing strategy on the connected components of the segmented image. The experimental evaluation on the DRIVE database shows accurate ex…

Automatic Unsupervised Segmentation of Retinal Vessels Using Self-Organizing Maps and K-Means Clustering

2011

In this paper an automatic unsupervised method for the segmentation of retinal vessels is proposed. A Self-Organizing Map is trained on a portion of the same image that is tested and K-means clustering algorithm is used to divide the map units in 2 classes. The entire image is again input for the Self-Organizing Map, and the class of each pixel will be the class of the best matching unit on the Self-Organizing Map. Finally, the vessel network is post-processed using a hill climbing strategy on the connected components of the segmented image. The experimental evaluation on the publicly available DRIVE database shows accurate extraction of vessels network and a good agreement between our segm…

Debito e ingratitudine: la sovversione del tumulo donum nelle Troades di Seneca

2017

Il contributo indaga il sovvertimento delle dinamiche di dono e debito nelle Troades senecane, alla luce dei modelli etici illustrati nel De beneficiis. Nella tragedia, Seneca riscrive la relazione di reciprocità vigente tra Achille e i Greci secondo il modello analogico del debito. L’ombra di Achille, infatti, accusa gli Achei di sottrarre gli honores dovuti ai suoi Mani, dando prova di ingratitudine. Come praemium, l’eroe esige quindi il sacrificio di Polissena, che rappresenta un sovvertimento della pratica rituale dei doni ai morti. Per comprendere il significato antropologico di questa lettura, si opererà un confronto ragionato tra la rappresentazione della prassi cultuale con cui a Ro…

Use of phenoclimatic models to estimate the chill and heat requirements of four sweet cherry cultivars in Italy

2017

During their dormant period, fruit trees require a certain amount of relatively low temperatures to complete bud differentiation processes and regularly resume growth the following spring. Unsatisfied chilling needs can result in delayed foliation, severe yield and fruit quality losses. There is a need for a method to estimate accurately the chilling requirement of a cultivar. This is especially important in those areas where the potential of chill accumulation in winter is low and for those crops, such as sweet cherry, which generally have a high chilling requirement. Historical temperature records and blooming dates of four sweet cherry cultivars widely cultivated in Italy - 'Burlat', 'Sw…

Utilizzazione di modelli fenoclimatici ai fini della valutazione delle esigenze termiche del ciliegio nelle diverse fasi del ciclo di sviluppo annuale

2011

Quality changes in fresh-cut mango cubes submitted to different gas partial pressure of active MAPs

2018

The study was performed to assess chemical-physical and sensory quality changes in 4±1°C stored fresh-cut mangos and to test the effect of active modified atmosphere packaging (MAP) with different gas partial pressures. Sicilian fruits of ‘Keitt’ mango (Mangifera indica L.) were immerged in hydrogen peroxide (H2O2) after being peeled. Next, the flesh was cut in cubes and dipped in citric acid (0.5%, w/v) and ascorbic acid (0.5%, w/v). Treated fruits were placed in a non-perforated high density polyethylene package flushing different gas mixtures and kept at 4°C for 21 days. We used four different gas partial pressures: a) 60 kPa N2, 30 kPa CO2 and 10 kPa O2; b) 30 kPa CO2 and 70 kPa N2; c) …

Hot dips and high temperature conditioning to improve shelf quality of late-crop cactus pear fruit (Opuntia ficus-indica L. Mill.)

1996

Effects of 1-MCP on post harvest quality and internal browning of white-flesh loquat fruit during cold storage

2017

Introduction – Treatments with 1-methylcyclopropene (1-MCP), an inhibitor of ethylene perception, were investigated on white-flesh loquat fruit to extend its shelf life and to prevent chilling injury. Ma- terials and methods – The loquat (Eriobotrya japonica Lindl.) white-flesh fruits (cv. Claudia) were submitted to applications of 1-MCP at 1 °C for 20 h and at concentrations from 1 to 5 μL L . The treated fruits were stored at 1 °C for 21 days before removal to 20 °C for ripening (shelf life). Fruit quality was analyzed at harvest, at the end of each storage period (7, 14, 21 days at 1 °C). Results and discussion - The 1-MCP treatment slowed fruit softening depending on concentration, and …