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23 articles for “Different Altitude”
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Research ArticleOpen accessIn the abstractThe Relationship between Habitat Altitude, Enviromental Factors and Morphological Characteristics of Pluchea Indica, Ageratum Conyzoides and Elephantopus ScaberYuliani, Soemarno, Bagyo Yanuwiadi, Amin Setyo LeksonoAsteraceae family has various benefit as herbal medicine and phytochemical affect (biopesticides). It can grow in different habitats but the morphological and physiological characters of Asteraceae depend on the environmental factor. The aims of the study is to describe the variation of height of stems and width of leaves from three species of Asteraceae family (Pluchea indica, Ageratum conyzoides and … …OnLine Journal of Biological Sciences, Vol. 15, Issue 3 · 23 Jul 2015 · 7,842 accessesView PDFCite
Research ArticleOpen accessIn the abstractEVALUATION OF THE ADEQUACY OF THE WIND SPEED EXTRAPOLATION LAWS FOR TWO DIFFERENT ROUGHNESS METEOROLOGICAL SITESDalila Khalfa, Abdelouaheb Benretem, Lazher Herous, Issam MeghlaouiIncreasing knowledge on wind shear models to strengthen their reliability appears as a crucial issue, markedly for energy investors to accurately predict the average wind speed at different turbine hub heights and thus the expected wind energy output. This is particularly helpful during the feasibility study to abate the costs of a wind power project. The extrapolation laws were found … …American Journal of Applied Sciences, Vol. 11, Issue 4 · 1 Feb 2014 · 7,439 accessesView PDFCite
Research ArticleOpen accessIn the abstractStabilized Controller Design for Attitude and Altitude Controlling of Quad-Rotor Under Disturbance and Noisy ConditionsM. Hassan Tanveer, S. Faiz Ahmed, D. Hazry et al.This article presents a control approach to obtain the better stabilization in attitude and altitude of quad-rotor under different disturbance conditions. In the standard Quad-rotor rotor type UAV, controlling of attitude and altitude is one of the most critical tasks and appropriate controller for stabilization of UAV is essential and necessary. These two controls under various conditions of disturbances was … …American Journal of Applied Sciences, Vol. 10, Issue 8 · 24 Jul 2013 · 8,524 accessesView PDFCite
Research ArticleOpen accessIn the abstractEvaluation of Theoretical and Practical Education of Mineral Trioxide Aggregate Manipulation for Dental StudentsE. Farokh Gisour, M. Hashemi PourProblem statement: The aim was to find out whether undergraduate students in Iranian dental schools were taught about and used clinically Mineral Trioxide Aggregate (MTA). Approach: Iranian senior dentistry students (487) were evaluated in this cross-sectional study. A questioner was prepared which contained personal questions in addition to theoretical and practical information about the use of MTA in senior dentistry … …Current Research in Dentistry, Vol. 1, Issue 2 · 16 Jul 2011 · 7,467 accessesView PDFCite
Research ArticleOpen accessIn the abstractVegetation Analysis of Sutan-Chay Basin in ArasbaranT. Ebrahimi Gajoti, V. Haciyev, A. Javanshir et al.Problem statement: Plants associations differ in relation to environmental gradients. Therefore, it is necessary to study the interaction between ecological factors and vegetation. Approach: In this study vegetation and flora of Sutan-Chay Basin in Arasbaran was investigated using Braun Blanquet method as physiognomic floristic. Sampling of soil and vegetation was carried out by selecting areas with homogenous plant compositions. The … …American Journal of Agricultural and Biological Sciences, Vol. 5, Issue 3 · 30 Sep 2010 · 7,879 accessesView PDFCite
Research ArticleOpen accessIn the abstractEvaluating Plant Species Diversity and Physiographical Factors in Natural Broad Leaf ForestSeyed Armin HashemiProblem statement: Species diversity is one of the most important specifications of biological societies. Diversity of organisms, measurement of variety and examination of those hypotheses that are about reasons of diversity are such as affairs that have been desired by the ecologists for a long time. Approach: In this research, diversity of plant species in forest region, numbers of 60 … …American Journal of Environmental Sciences, Vol. 6, Issue 1 · 28 Feb 2010 · 7,609 accessesView PDFCite
Research ArticleOpen accessIn the abstractDetecting Hornbeam Trees Phenological Characteristics of Mountain ForestSasan Babaei Kafaki, Asadollah Mataji, Seyed Armin HashemiProblem statement: Phenology is the study of the seasonal occurrence of developmental or life cycle events, such as bud break, flowering, or autumn leaf drop. The proposed study attempted to quantify changes in Carpinus betulus L. phenology of deciduous broad leaf forest between the years 2003-2006. Approach: Phenological studies were fulfilled during four years as from January 2003-December 2006 by … …American Journal of Environmental Sciences, Vol. 5, Issue 5 · 31 Oct 2009 · 7,273 accessesView PDFCite
Research ArticleOpen accessIn the abstractPreliminary Design and Performance-Stability Analysis of a Fixed-Wing UAV Using XFLR5Campos Rodriguez Victor Antonio, Su YanThis research aims to find the best airfoil and tail configuration for the designing of a UAV of 30 kg capable of carrying a payload of at least 5 kg; for this purpose, work focuses on the analysis of different airfoils for low Reynolds numbers in specific do airfoils with an under cambered design and capable of reaching high lift … …Journal of Aircraft and Spacecraft Technology, Vol. 7, Issue 1 · 26 Dec 2023 · 8,058 accessesView PDFCite
Research ArticleOpen accessIn the abstractAnalysis of Tree-Ring Chronologies in Coniferous Forests of Southeastern KazakhstanAinur Utebekova, Bagila Maisupova, Bulkair Mambetov et al.The aim of the present research was to study the spatial and temporal patterns in the growth response of spruce to climate change at different altitudes (upper, middle and lower) of mountainous terrain in Southern Kazakhstan. The analysis of the climatic response of the generalized chronologies was carried out by calculating the correlation coefficients (Rs) between the growth indices and … …OnLine Journal of Biological Sciences, Vol. 21, Issue 1 · 5 Feb 2021 · 6,641 accessesView PDFCite
Literature ReviewOpen accessIn the abstractAbout Bell Helicopter FCX-001 Concept Aircraft-A Short ReviewRelly Victoria Petrescu, Raffaella Aversa, Bilal Akash et al.Bell Helicopter is always preparing beautiful surprises for us, so this year has not been outdone and has revealed its vision of its future aircraft model FCX-001, a true vertical elevator, ment to can climb to high altitudes in a record time, with an enviable dynamics and maneuverability. The first appearance of the new model FCX-001 took place at Heli … …Journal of Aircraft and Spacecraft Technology, Vol. 1, Issue 2 · 29 Jun 2017 · 14,021 accessesView PDFCite