Search results for "riga"
showing 10 items of 700 documents
Minor Losses and Best Manifold Position in the Optimal Design of Paired Sloped Drip Laterals
2018
Arranging paired laterals so that two distribution pipes extend in opposite directions from a common manifold contributes to providing more uniform pressure to all laterals in the system, increasing water use and energy efficiency of micro-irrigation. Towards this end, by neglecting emitters’ minor losses, analytical procedures to design paired drip laterals laid on uniform slopes were introduced. More recently, it was shown that for an optimal paired sloped lateral design the best position of the manifold (BMP) equals 24%. In this paper, first the mentioned analytical procedure is extended to the case in which minor losses are considered. Second, by neglecting minor losses, a comparison in…
Papīra locīšanas prasmju apguves veicināšanas iespējas sešgadīgiem bērniem
2019
Darba autors ir Iveta Bankova. Darba temats ir papīra locīšanas prasmju apguves veicināšanas iespējas sešgadīgiem bērniem. Pētījuma mērķis ir teorētiski analizēt un atklāt sešgadīgu bērnu papīru locīšanas prasmju apguves iespējas pirmsskolas izglītības iestādē. Hipotēze: locīšanas prasmes bērni apgūst vislabāk, ja: •tiek ņemts vērā bērna intereses un vajadzības; • mācību procesā izmanto didaktikas principus no vieglākā uz sarežģīto. Pirmajā nodaļā tiek analizēts prasmju jēdziens dažādu autoru I.Žogles, A.Karules, N.Poddjakovas, V.Hibneres, L.Grasmanes, V.Avotiņa skatījumā. Skaidrots prasmju jēdziens pirmsskolas mācību kontekstā. Otrajā nodaļā izzināta un analizēta psihologu V.Renģes, L.Grīn…
Technical English for agriculture
2021
As the world goes global, the agricultural business needs to move across frontiers and oceans. Food, raw and processed, is regularly transported across continents. As space is no longer a limit for food trade and human nutrition, language cannot represent a barrier to this continuous exchange. In the last 60 years, English has been taking a foothold as the primary language for world trade and the exchange of agricultural goods is no exception. Agricultural sciences embrace a large number of disciplines, from botany to environmental physiology, from soil science to meteorology, from plant propagation to cultural management, from soil management to pest control, from field crops to animal husb…
Synergy of Sentinel-1 and Sentinel-2 Time Series for Cloud-Free Vegetation Water Content Mapping with Multi-Output Gaussian Processes
2023
Optical Earth Observation is often limited by weather conditions such as cloudiness. Radar sensors have the potential to overcome these limitations, however, due to the complex radar-surface interaction, the retrieving of crop biophysical variables using this technology remains an open challenge. Aiming to simultaneously benefit from the optical domain background and the all-weather imagery provided by radar systems, we propose a data fusion approach focused on the cross-correlation between radar and optical data streams. To do so, we analyzed several multiple-output Gaussian processes (MOGP) models and their ability to fuse efficiently Sentinel-1 (S1) Radar Vegetation Index (RVI) and Senti…
Recupero e utilizzazione del freddo nella rigassificazione del GNL
2008
Rigassificatori: e se l’Italia diventasse lo snodo d’Europa?
2006
Root hydraulic conductivity in three self-rooted and grafted table grape cultivars
2012
<p style="text-align: justify;"><strong>Aim</strong>: Root hydraulic conductivity is one of the main factors that control water flow in the soil-plant system and ultimately affect crop irrigation requirements. This work sets out to estimate root water conductivity for three self-rooted or grafted table grape cultivars.</p><p style="text-align: justify;"><strong>Methods and results</strong>: We evaluated root water conductivity of the cultivars ‘Black Magic’, ‘Matilde’ and ‘Victoria’ grafted onto 1103 Paulsen rootstock or self-rooted. Measurements were performed on two-year-old table grapes grown in pots filled with pumice. Root water conductivity wa…
Assessing HYDRUS-2D model to simulate water content and salt accumulation in a soil irrigated with a subsurface drip system: Application in a semiari…
2015
In this paper, the suitability of HYDRUS-2D model to predict the average soil water content in the root zone of potato crop irrigated with subsurface drip irrigation plant, is initially assessed on the basis of a field study. Then, the model is tested to predict the salt distribution around a buried emitter, when two different water qualities (i.e. electrical conductivity of 1.0 dS m-1 and 4.0 dS m-1), are used during the growing season (treatments T1 and T2). Finally, the soil volume in which salts accumulates, as well as the effects on crop yield is recognized for both the considered treatments.The results evidenced that predicted values of average soil water content in the root zone were…
Sobre alguns participis actius amb verbs de moviment
2021
L’objectiu d’aquest estudi és analitzar les estructures formades a partir de la combinació d’un participi amb un verb de moviment, en casos com venir plorat de casa. L’interès d’aquestes dades rau en el fet que els participis que descrivim no són actius (plorat, tossit), però adquireixen una lectura activa en combinar-se amb verbs de desplaçament (venir, sortir, arribar). Al llarg de l’article recopilem i descrivim les dades que segueixen aquesta configuració i mirem d’esbossar alguns apunts per a una possible anàlisi formal. D’una banda, seguint la proposta d’Armstrong (2017), defensem que verbs com plorar o tossir permeten la formació d’un participi actiu resultatiu perquè tenen un object…