Search results for "riga"

Usançen der Börse und Convention der über See handelnden Kaufmannschaft in Riga: neuerdings revidirt und festgesetzt im November 1859

1860

Discussion of “Modified Hazen–Williams and Darcy–Weisbach Equations for Friction and Local Head Losses along Irrigation Laterals” by John D. Valiantz…

2007

Using the ARP-03 for high-resolution mapping of calcic horizons

2013

A b s t r a c t. The aim of this work is to present a fast and cheap method for high-resolution mapping of calcic horizons in vineyards based on geoelectrical proximal sensing. The study area, 45 ha located in southern Sicily (Italy), was characterized by an old, partially dismantled marine terrace and soils with a calcic horizon at different depths. The geoelectrical investigation consisted of a survey of the soil electrical resistivity recorded with the Automatic Resistivity Profiling-03 sensor. The electrical resistivity values at three pseudo-depths, 0-50, 0-100 and 0-170 cm, were spatialized by means of ordinary kriging. A principal component analysis of the three electrical resistivit…

Versatile Pedagogical and Social Activities of a Graduate of Riga Polytechnic Institute Jānis Stiprais (1870–1946)

2021

The research discusses continuous effort of a pedagogue, economist and journalist Jānis Stiprais (1870–1946) in his pursuit to obtain education and his versatile pedagogical activities in Tomsk (Russia), Tukums, Valka and Riga, as well as the contribution he made in such areas as journalism, folklore and social work. J. Stiprais shared his knowledge of economics gained at Riga Polytechnic Institute (RPI) with the students at the University of Latvia (UL), Latvia People’s University and Vilis Olavs Commercial School; in the first half of the 20th century he was the principal of educational institutions in Tukums, Valka and Riga, he also was one of the signatories of the Memorandum of the Cen…

Special issue on Trends and challenges of sustainable irrigated agriculture

2014

In the twenty-first century, the shortage of freshwater is one of the most important environmental concerns facing several regions of the world because of the growing demand of increasing population, agricultural intensification, and economic growth. Global climate change will contribute to exacerbate the problem, generating new drought-prone areas and increasing those already characterized by severe aridity. Worldwide it is estimated that, on average, agriculture accounts for 70% of the total water consumption, compared with 10% for domestic consume and the remaining used by industry. Moreover, according to FAO estimates, by 2050 agricultural production has to increase by 60% to satisfy th…

Rigaer Handels-Archiv: alphabetisches Register zum Rigaer Handels-Archiv und zu den demselben vorausgegangenen Druckschriften des Rigaer Börsen-Comité

1883

Rigaer Handels-Archiv: alphabetisches Register zum Rigaer Handels-Archiv und zu den demselben vorausgegangenen Druckschriften des Rigaer Börsen-Comit…

1898

PUÒ IL POTERE ESSERE NEUTRALE? AGONISMO, RESISTENZA E SOGGETTIVITÀ NOTE SUL FOUCAULT DI BRIGAGLIA

2020

In questo articolo sottopongo ad alcune considerazioni critiche la tesi di Brigaglia secondo la quale il Foucault degli anni ’80 avrebbe maturato ed esplicitato una concezione del potere, neutrale e pragmatica, qualitativamente molto diversa da quella, conflittualista e ultra-radicale, che attraverserebbe invece i suoi lavori degli anni ’70. In contrario, sosterrò che, pur con diverse accentazioni, il pensiero di Foucault è costantemente informato all’idea secondo cui ogni relazione di potere comporta sempre un agonismo, attuale o anche solo potenziale, che ha come contraltare una resistenza, anche questa attuale o potenziale, del bersaglio; sosterrò, altresì, che questa dinamica potere-res…

A carbon budget model to predict branch carbohydrate deficiencies as a function of water stress and crop load in pistachio (Pistacia veraL.)

2018

The effect of irrigation and crop load on alternate bearing was studied in pistachio tree using a “branch carbon budget model” developed to calculate branch carbohydrate balance. Experiences were conducted in Sicily (37°26’N, 14°03’E, 360 m a.s.l.) on female trees of ‘Bianca’. Two treatments were applied: rainfed (T0) and 100 mm of irrigation (T100). At 29, 44, 65, 86, 103 and 121 DAFB, on one fully expanded leaf selected on three trees per treatment, were monitored leaf gas exchanges. At 15 days interval, three branches treatment-1 were excised and, in the lab, the following parameters were measured: total photosynthetically active leaf surface; number of leaves, fruits, shoot fresh weight…

CommercialOriganum compactumBenth. andCinnamomum zeylanicumBlume essential oils against natural mycoflora in Valencia rice

2015

Chemical composition of commercial Origanum compactum and Cinnamomum zeylanicum essential oils and the antifungal activity against pathogenic fungi isolated from Mediterranean rice grains have been investigated. Sixty-one compounds accounting for more than 99.5% of the total essential oil were identified by using gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS). Carvacrol (43.26%), thymol (21.64%) and their biogenetic precursors p-cymene (13.95%) and γ-terpinene (11.28%) were the main compounds in oregano essential oil, while the phenylpropanoids, eugenol (62.75%), eugenol acetate (16.36%) and (E)-cinnamyl acetate (6.65%) were found in cinnamon essential oil. Both es…