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648 articles for “DRA”
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Research ArticleOpen accessEvery word in the titleReclamation of Irrigated Lands and Improvement of the Groundwater Regime Under Vertical Drainage OperationBalzhan Amanbayeva, Raushan Dzhaisambekova, Alexander Basmanov et al.The aim of the study was to identify patterns of seasonal groundwater-level fluctuations and assess the effectiveness of vertical drainage in regulating the reclamation regime of saline lands in Kazakhstan. The methods included monitoring-well observations, calculation of seasonal amplitudes, Student’s t-test, the Mann-Whitney U test, and Pearson correlation analysis. Before the growing season, groundwater occurred at a depth of 1.5-1.7 … …OnLine Journal of Biological Sciences, Vol. 26, Issue 4 · 23 Sep 2026 · 619 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleEvaluation of Surface Drag Interval in the Variable SituationsParisa Ashrafi, Amir Hossein Ashrafi, Hossein Gholami et al.Tools applied in different fields of engineering are artificial neural networks to model non-linear systems which are efficient and useful. Artificial neural networks consist of input and output layers with one or more hidden layers between them. In fact, one or more processing elements or neurons are used in each layer. Input layer neurons are the independent variables studied and … …American Journal of Engineering and Applied Sciences, Vol. 15, Issue 1 · 12 Mar 2022 · 6,005 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleImpact of the Drainage Slope Experimental Study on the Manning Roughness CoefficientKaveh Ostad-Ali-Askari, Hossein Gholami, Shahide Dehghan, Morteza SoltaniIt was Determined the current persistence components were significant in hydraulic designs of highland zone with sharp slopes. It was defined to examine the consequence of gradient, rapidity, depth and dimension of coarseness on the manning coarseness factor in this superficial river area. This is an investigational education about manning coarseness defined for highland zones protected by elements in three … …American Journal of Engineering and Applied Sciences, Vol. 14, Issue 1 · 15 Jan 2021 · 6,722 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleDetermination of Draft Force for a 3-bottom Disc Plough Under Sandy Loam Soil ConditionsPaul Okoko, Emmanuel A. AjavThis study was performed to determine the draft force for a 3-bottom disc plough under sandy loam soil conditions. The experiments were conducted using five different tractor speeds (3.6, 5.4, 7.2, 9.0 and 10.8 kilometer per hour(km)) and three tillage depths (10, 20 and 30 centimeter(cm)) with a view to determine the actual implement speed at the different tillage depths. … …American Journal of Agricultural and Biological Sciences, Vol. 15, Issue 1 · 15 May 2020 · 7,390 accessesView PDFCite
Research ArticleOpen accessEvery word in the titlePrediction and Remediation of Water Quality in Monitoring Potential of Acid Mine DrainageNur Athirah Mohamad Basir, Wan Zuhairi Wan Yaacob, Nuur Hani Mohammed et al.Acid Mine Drainage (AMD) associated with both active and abandoned mining operations related to sulfide minerals, oxidation of pyrite affording an acidic solution that contains toxic metal ions. Result shows that pH value of water in Kg. Aur, Chini and Sg. Lembing are acidic with value of 2.81, 4.16 and 3.60 respectively. Maximum concentrations of heavy metals in the study … …American Journal of Engineering and Applied Sciences, Vol. 12, Issue 2 · 24 May 2019 · 7,014 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleDeep Erosion by Continental Ice Sheets: A Northern Missouri River Drainage Basin Perspective: North AmericaEric ClausenWhile accepting some erosion by continental ice sheets most geologists reject a previously proposed deep erosion by continental ice sheets hypothesis, yet common sense logic suggests continental ice sheets should have eroded much more than they are usually given credit for. Such situations arise in scientific communities when an accepted paradigm cannot adequately explain significant observable evidence. A new and … …Current Research in Geoscience, Vol. 8, Issue 1 · 18 Jan 2019 · 8,889 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleStudy of the Parameters of Steam Assisted Gravity Drainage (SAGD) Method for Enhanced Oil Recovery in a Heavy Oil Fractured Carbonate ReservoirArzhang NabilouBy increasing in the use of nonrenewable energy and decreasing in discovering hydrocarbonic reservoirs, in near future the world will encounter with a new challenge in the field of energy, so increase in recovery factor of the existing oil reservoirs is necessary after the primary production. In one hand the existence of untouched heavy oil reservoirs in Iran and lack … …American Journal of Engineering and Applied Sciences, Vol. 9, Issue 3 · 6 Sep 2016 · 8,343 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleProximate Analysis of Dragon Fruit (Hylecereus polyhizus)Ruzainah Ali Jaafar, Ahmad Ridhwan Bin Abdul Rahman, Nor Zaini Che Mahmod, R. VasudevanProblem statement: Dragon fruit (Hylecereus polyhizus) is well known for the rich nutrient contents and it is commercially available worldwide for improving many health problems. Several studies show the proximity value of red pitaya fruits but the nutrient composition of the stem has not been extensively studied. Approach: This study was carried out to measure the proximate analysis of moisture … …American Journal of Applied Sciences, Vol. 6, Issue 7 · 31 Jul 2009 · 14,059 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleThe First Report of the Occurrence of Anthracnose Disease Caused by Colletotrichum gloeosporioides (Penz.) Penz. & Sacc. on Dragon Fruit (Hylocereus spp.) in Peninsular MalaysiaMasanto Masyahit, Kamaruzaman Sijam, Yahya Awang, Mohd Ghazali Mohd SatarProblem statement: The increasing of dragon fruit (Hylocereus spp.) plantations in Malaysia enhances the researches on this crop, particularly focusing on its physico-chemical characteristics, great potential health benefits and nutritional value. However, its scientific report of disease is still lacking, primarily on anthracnose disease. This study was then conducted to investigate the distribution of anthracnose disease on dragon fruit and … …American Journal of Applied Sciences, Vol. 6, Issue 5 · 31 May 2009 · 11,833 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleExperimental Comparison Between Evolutionary Algorithm and Barycenter Heuristic for the Bipartite Drawing ProblemZoheir EzzianeThis research investigates the use of intelligent techniques for the bipartite drawing problem (BDP). Due to the combinatorial nature of the solution space, the use of traditional search methods lead to exponential time. Hence, the aim of this paper is to speed up the search time when solving the BDP through the use of Evolutionary Algorithms (EAs) and Barycenter Heuristic … …Journal of Computer Science, Vol. 3, Issue 9 · 30 Sep 2007 · 6,723 accessesView PDFCite