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50 articles for “altitude”
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Research ArticleOpen accessIn the abstractManaging Air in Olympic CitiesQing Wen Tian, Peter BrimblecombeThe 21st century Olympic Agenda aims to align itself with the concept of sustainable development and has driven improved environmental quality in host cities, such as the Green Games in Sydney 2000 and the planned Beijing 2008 Games and in London 2012 as the Low Carbon Games. Air quality has long been a concern of Olympic mega-cities, although the air … …American Journal of Environmental Sciences, Vol. 4, Issue 5 · 31 Oct 2008 · 7,689 accessesView PDFCite
Research ArticleOpen accessIn the abstractVegetation Dynamics in the Tafileh Woodlands of Southern JordanSaleh Al-Qura'nWoodland vegetation in the Tafileh highlands of southern Jordan was investigated and quantitatively surveyed to determine the patterns of vegetation dynamics associated with altitude and topography. Three tree species (Juniperus phoenicea L. (evergreen needle-leaved woodland resistant to cold), Pistacia atlantica Desf. and Quercus aegilps L. (cold-deciduos broad-leaved woodland) and five shrubs (Colutea istria Miller, Gomphocarpus sinaicus R. Br., Thymelaea hirsute … …American Journal of Environmental Sciences, Vol. 1, Issue 1 · 31 Mar 2005 · 6,929 accessesView PDFCite
Research ArticleOpen accessIn the abstractCharacterization of Fructan Content from Stem Juices of Different Varieties of Agave Atrovirens, Traditionally Used for the Production of Pulque. Production of a Sweetening Syrup by Chemical and Enzymatic ProcessingKaren Gott-Bravo, Arnulfo Pluma-Pluma, Victor Eric López-López et al.Agave atrovirens, the hardiest species of Agave in Mexico, thrives in tough, infertile soils and extreme temperatures across a wide range of altitudes, particularly in impoverished rural areas of Central and Northern Mexico. Its potential for agroindustrial use could offer a pathway to social and economic prosperity for many communities. Traditionally, A. atrovirens is tapped for its sap, known as … …American Journal of Agricultural and Biological Sciences, Vol. 19, Issue 1 · 4 Mar 2025 · 7,670 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 abstractAn Annotated Checklist of Powdery Mildew Fungi (Erysiphaceae) in the Ile-Alatau Mountains (within Kazakhstan)G. Sypabekkyzy, T. Bulgakov et al.The Erysiphaceae family is a diverse group of fungi with complex evolutionary relationships. All previous data for powdery mildew fungi in Ile-Alatau are outdated and needed to be revised due to changes in the Erysiphaceae taxonomy. The purpose of our research was to revise all data and to compile an actual checklist of Erysiphaceae in the Ile-Alatau based on revisions … …OnLine Journal of Biological Sciences, Vol. 24, Issue 1 · 14 Nov 2023 · 5,623 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
Research ArticleOpen accessIn the abstractAssessing the Trend of Climate Change in the Western NepalPurna Bahadur Khand, Vikash Kumar KC, Ananta Raj Dhungana, Surya Mani DhunganaThis study assesses the change in the climatic variables in the western region of Nepal. Monthly data on minimum temperature, maximum temperature and rainfall for five stations, namely, Chame, Lumle, Khudibazar, Khairenitar and Dumkauli of Manang, Kaski, Lumjung, Tanahu and Nawalparasi districts respectively, obtained from the Department of Hydrology and Meteorology (DHM) of Nepal are considered. Data availability for these … …American Journal of Environmental Sciences, Vol. 16, Issue 6 · 22 Dec 2020 · 7,589 accessesView PDFCite
Review ArticleOpen accessIn the abstractSome Special AircraftRelly Victoria Petrescu, Raffaella Aversa, Bilal Akash et al.In this study, the authors want to present a few more distinct aircraft from a constructive and functional point of view. Their role has often been determined by the need to achieve or fulfill certain more or less strategic objectives. Such ships will also be built in the future more and more often in order to be able to respond … …Journal of Aircraft and Spacecraft Technology, Vol. 1, Issue 3 · 19 Aug 2017 · 7,458 accessesView PDFCite
Review ArticleOpen accessIn the abstractAbout Northrop GrummanRelly Victoria Petrescu, Raffaella Aversa, Bilal Akash et al.The Northrop Grumman (formerly Ryan Aeronautical) RQ-4 Global Hawk (known as Tier II+ during development) is an Unmanned Aerial Vehicle (UAV) used by the United States Air Force and Navy and the German Air Force as a surveillance aircraft. The Northrop Grumman B-2 Spirit (also known as the Stealth Bomber) is an American strategic bomber, featuring low observable stealth technology … …Journal of Aircraft and Spacecraft Technology, Vol. 1, Issue 3 · 19 Aug 2017 · 9,172 accessesView PDFCite
Research ArticleOpen accessIn the abstractResponses in Nitrogen Mass and Nitrogen Metabolism of Wild Sugarcane (Saccharum spontaneum L.) UV-B Radiation Under Field ConditionsYanqun Zu, Yuan Li, Haiyun Wang, Yongmei HeField experiments were conducted to evaluate effects of enhanced UV-B radiation (280-315 nm) on intraspecific responses in nitrogen mass and nitrogen metabolism of six wild sugarcane (Saccharum spontaneum L.) clones. The clones were collected from original sites with different altitudes (4-1780 m above sea-level) and latitudes (18-38°N). The supplemental UV-B radiation was 5.00 kJ⋅m-2, simulating a depletion of 20% stratospheric … …American Journal of Environmental Sciences, Vol. 9, Issue 6 · 7 Jan 2014 · 6,656 accessesView PDFCite