Sign inSubmit
Tips: “quotes” for a phrase · author:Lee · a DOI goes straight to its article

50 articles for “Altitude”

Set a search alert
Also matching:1 special issue
Review ArticleOpen accessIn the abstractSome Aspects Related to DronesRelly Victoria Virgil PetrescuDrones developed very quickly and today have come to conquer airspace even more than conventional aviation. Whether they are unmanned or with a crew, whether they are on autopilot, usually remotely coordinated, or remote-controlled or even manned, drones in their diversity today have taken on a very large scale and they will surely develop rapidly and further, being the ones … …American Journal of Engineering and Applied Sciences, Vol. 13, Issue 3 · 23 Sep 2020 · 7,110 accessesView PDFCite
Research ArticleOpen accessIn the abstractDistribution Pattern of SN in Qinghai-Tibet Plateau and Its Relationship with Environmental FactorsXibo Feng, Yan He, Yi Zhang et al.Studying the distribution pattern and driving mechanism of Soil Nitrogen (SN) in the agricultural areas of the Qinghai-Tibet Plateau is of certain significance for the rational use of N fertilizer, improving the quality of land use and protecting the environment. The SN content of cultivated soil in Qinghai-Tibet Plateau agricultural areas was analyzed by combining geographical and meteorological factors. It … …American Journal of Biochemistry and Biotechnology, Vol. 16, Issue 3 · 2 Jul 2020 · 6,625 accessesView PDFCite
Review ArticleOpen accessIn the abstractMission Shakti aka Project XSV-1: India’s First Anti-Satellite Test (ASAT)Santosh KosambeThe Mission Shakti, also called as Project XSV-1 was India’s first Anti-Satellite Test (ASAT) conducted successfully on 27 March 2019. The PDV-MK II interceptor missile designed and developed by Defence Research and Development Organisation (DRDO) was launched from Dr A.P.J. Abdul Kalam Island to intercept the Microsat-R satellite. The Microsat-R satellite, which acts as a prime target for the mission … …Journal of Aircraft and Spacecraft Technology, Vol. 3, Issue 1 · 25 Jul 2019 · 13,826 accessesView PDFCite
Research ArticleOpen accessIn the abstractMapping of Temperature Trend Slope in Iran′s Zayanderud River Basin: A Comparison of Interpolation MethodsAli Zahraei, Saeid Eslamian, Ali Saeidi Rizi et al.The spatial distribution of daily, nightly and mean temperature trend in Iran′s Zayanderud river basin was carried out in this study by applying three approaches of interpolation including Inverse Distance Weighting (IDW), Multiple Linear Regression (MLR) and integration of these two methods (IDW+MLR). In this paper, t-test and statistical measures including Mean Absolute Error (MAE), Root Mean Square Error (RMSE), … …American Journal of Engineering and Applied Sciences, Vol. 12, Issue 2 · 26 Jun 2019 · 7,470 accessesView PDFCite
Research ArticleOpen accessIn the abstractSpace Distribution of Highland Barley GNS and its Relationship with Environmental Factors in the Qinghai-Tibet PlateauXibo Feng, Gaihua Wang, Jianlin WangIn order to study the space distribution of Grain Number per spike (GNS) and its relationship with the environmental factors in the Qinghai-Tibet Plateau, 83 data samples from different ecological areas were selected for GNS inverstigation. Meanwhile, the seeds of highland barley were harvested and planted in the farm of Xizang Agriculture and Animal Husbandry College; the varieties without genetic … …American Journal of Biochemistry and Biotechnology, Vol. 14, Issue 2 · 26 Apr 2018 · 10,833 accessesView PDFCite
Review ArticleOpen accessIn the abstractNASA Sees First in 2018 the Direct Proof of Ozone Hole RecoveryRelly Victoria Petrescu, Raffaella Aversa, Antonio Apicella, Florian Ion Tiberiu PetrescuFor the first time, scientists have shown through direct observations of the ozone hole by a satellite instrument, built by NASA's Jet Propulsion Laboratory in Pasadena, California, that levels of ozone-destroying chlorine are declining, resulting in less ozone depletion. Measurements show that the decline in chlorine, resulting from an international ban on chlorine-containing human-produced chemicals called Chlorofluorocarbons (CFCs), has resulted … …Journal of Aircraft and Spacecraft Technology, Vol. 2, Issue 1 · 22 Jan 2018 · 10,688 accessesView PDFCite
Research ArticleOpen accessIn the abstractAirlanderRelly Victoria Virgil Petrescu, Raffaella Aversa, Bilal Akash et al.Man always dreamed of flying. The important thing is not that it succeeded but that it has evolved permanently, improving its flight. The main problem in aviation was also the safety of the flight. How to keeps in the air, even when serious problems arise. Generally, the porting was made with engines and wings. But such support can’t be very … …Journal of Aircraft and Spacecraft Technology, Vol. 1, Issue 2 · 5 Jul 2017 · 7,925 accessesView PDFCite
Review ArticleOpen accessIn the abstractHistory of Aviation-A Short ReviewRelly Victoria Virgil Petrescu, Raffaella Aversa, Bilal Akash et al.The man has always wanted to be able to fly. The dream or although it has achieved, has not been reached yet fully. The fuse of the flight today is much higher than in the past, but is not yet complete. Although they have carried out the steps in the increase of the safety of a ship in flight, there … …Journal of Aircraft and Spacecraft Technology, Vol. 1, Issue 1 · 22 May 2017 · 16,578 accessesView PDFCite
Review ArticleOpen accessIn the abstractWhen Boeing is Dreaming – a ReviewRelly Victoria Virgil Petrescu, Raffaella Aversa, Bilal Akash et al.Boeing is an aeronautical and aerospace manufacturer. Its head office is located in Chicago, Illinois. Its two largest plants are located in Wichita, Kansas and Everett, near Seattle. This aircraft manufacturer specializes in the design of civil aircraft, but also in military aircraft, helicopters and in satellites and rockets with its Boeing Defense, Space and Security division. In 2012, it … …Journal of Aircraft and Spacecraft Technology, Vol. 1, Issue 3 · 7 Jul 2017 · 13,868 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