Search results for "MAZ"
showing 10 items of 3205 documents
Short-duration rainfalls in Sicily
1990
The Italian Hydrographic Service publishes yearly maximum rainfall depths with 1-, 3-, 6-, 12-, and 24-hr duration, recorded by recording rain gauges. It also publishes selected short-duration (t<1 hr) rainfall amounts. It is impossible to carry out a statistical analysis of the short-duration rainfalls for each recording rain gauge because the published data correspond to different record durations and to different recording rain gauges from year to year. Therefore, there is a practical need to derive empirical relationships between the 1-, 3-, 6-, 12-, and 24-hr duration amounts and shorter duration (t<1 hr) rainfall amounts. Such a relationship has been proposed by Bell and has been veri…
Postoperatīvas neiropātijas pēc v.saphena magna vai saphena parva ekstirpācijas vai ablācijas
2019
Mūsdienās HVM ir plaši izplatīta un rada ne tikai medicīniskas,bet arī kosmētiskas problēmas,kā dēļ, sevišķi sievietes,vēršas pēc ķirurģiskas palīdzības.Šobrīd pieejamās mazinvazīvās ārstēšanas metodes,salīdzinot ar flebektomiju,tiek asociētas ar mazāk blakus parādībām un komplikācijām.Tomēr viena no iespējamajām un smagākajām komplikācijām-apakšējo ekstremitāšu nervu bojājuma radīta neiropātija,iespējama visu ārstēšanas metožu rezultātā,lai gan parasti tiek asociēta ar v.saphena magna vai v.saphena parva ekstirpāciju vai ablāciju.Mērķis:noskaidrot neiropātiju biežumu dažādu HVM ķirurģiskās ārstēšanas metožu gadījumā.Materiāli: Prospektīvs pētījums.Pacienti tika sadalīti grupās atkarībā no …
Il territorio e l'uso delle energie rinnovabili nella città
2012
In Italia, secondo quanto riportato nell’Annuario dei Dati Ambientali del 2010, redatto a cura dell’Ispra, le emissioni di gas serra sono state in costante aumento a partire dal 1996 fino al 2004, per poi subire un’inversione di tendenza negli anni successivi con un -5,7% nel 2008 rispetto al 2004. Complessivamente le emissioni energetiche di gas serra nel 2008 sono cresciute del 8,2% rispetto al 1990. Inoltre, sulla base delle quantità di emissioni, l’Italia potrebbe non essere in grado di rispettare l’obiettivo di riduzione fissato per l’Italia dal Protocollo di Kyoto e dal burden sharing interno dell’Unione Europea (una riduzione del 6,5% tra il 2008 e il 2012, con riferimento ai livelli…
Closed-form solutions of the energy balance equation for drip laterals under the Darcy-Weisbach resistance formula
2018
Many studies have investigated easy methods to design drip laterals, as well as the best resistance equation to use, which is fundamental to accurately account for friction losses. This paper addresses both the features of lateral design relationships and the influence of the friction-loss equation on the design variables. First, simple closed-form solutions of the energy balance equation for both sloped and horizontal drip laterals are derived with the simplified Darcy-Weisbach resistance formula by assuming the Darcy friction factor as invariant versus the Reynolds number. Second, an error analysis is performed assuming the friction factor as constant in the design, which is compared to u…
Water need of Energy Crops – one of the environmental problems of Poland
2010
The government policy updates of Poland are presented, showing legal and financial instruments for governing bioenergy developments. The strategy for renewable energy must be co-ordinated with the strategy of water management in the country. The water needs are given for cool climate and extensive agriculture of Central and Eastern Europe which are few times lower than for hotter condition of Southern Europe. Despite this the rain would be not enough for water supply of most of the energy crops.
Dimensional analysis and stage-discharge relationship for weirs: a review
2017
Deducing the weir flow stage-discharge relationship is a classical hydraulic problem. In this regard Buckingham’s theorem of dimensional analysis can be used to find simple and accurate formulas to obtain the rating curves of different weir types. At first, in this review paper the rectangular weir that is a very common hydraulic structure is studied. It is indicated that the crest shape, approach channel width, obliquity (angle between the weir crest and the direction normal to the flow motion) and vertical inclination (pivot weir) are the key-parameters affecting the flow over the rectangular weirs. The flow over the triangular, labyrinth, parabolic, circular, elliptical, and W-weirs are …
Testing mechanical characteristics of chestnut stakes used in bed sills for stream restoration
2017
Using of wood elements for constructing bed sills in Mediterranean streams, where the banks are not protected by tree vegetation, needs an evaluation of biological and mechanical characteristics for evaluating both the wood durability and the effectiveness of the stream restoration project. Very few studies have dealt both with the decay of mechanical characteristics of wood elements employed for stream restoration works and with the changes over time of physical and chemical wood characters. In this paper, for a wood and stone bed sill located in a stream having no shaded banks, the changes of physical and chemical characters detected after 12, 18, 24, 30, 36, 42 and 48 months on chestnut …
Integrated emitter local loss prediction using artificial neural networks.
2010
This paper describes an application of artificial neural networks (ANNs) to the prediction of local losses from integrated emitters. First, the optimum input-output combination was determined. Then, the mapping capability of ANNs and regression models was compared. Afterwards, a five-input ANN model, which considers pipe and emitter internal diameter, emitter length, emitter spacing, and pipe discharge, was used to develop a local losses predicting tool which was obtained from different training strategies while taking into account a completely independent test set. Finally, a performance index was evaluated for the test emitter models studied. Emitter data with low reliability were removed…
User Activity Recognition for Energy Saving in Smart Homes
2015
Abstract Energy demand in typical home environments accounts for a significant fraction of the overall consumption in industrialized countries. In such context, the heterogeneity of the involved devices, and the non negligible influence of the human factor make the optimization of energy use a challenging task; effective automated approaches must take into account basic information about users, such as the prediction of their course of actions. Our proposal consists in learning customized structural models for common user activities for predicting the trend of energy consumption; the approach aims to lower energy demand in the proximity of predicted peak loads so as to keep the overall cons…
THE METAMODEL: A STARTING POINT FOR DESIGN PROCESSES CONSTRUCTION
2010
The construction of ad-hoc design processes following the Situational Method Engineering (SME) paradigm is currently carried out by adopting a set of phases for which, until now, no well defined techniques and guidelines have been established. The consequence is that organizations are very dependent on method designers' skills. In this paper, we propose an approach based on SME for constructing customized agent oriented design processes. Our approach adopts the metamodel as the most important factor leading to the selection and assembly of method fragments and an algorithm for establishing the instantiation order of metamodel elements. The algorithm makes the proposed approach repeatable a…