Results 31 to 40 of about 76,520 (193)

Investigation of the effect of alpha-aluminum oxide nanoparticles addition to UV-curable resin for 3D printing: Material characterization and mechanical properties analysis

Results in Engineering
In this research, we tried to study the printer's ability to handle high additive ratios, starting with adding 5 wt. % of aluminum oxide nanopowder and incrementing by 5 wt. % to research the maximum ratio of the printer, 30 wt. %.
Ali H. Al-helli, Ali N. Alobiedy
doaj   +1 more source

Analisis Bahan Bakar Campuran Methanol dengan Minyak Jarak terhadap Performa Engine 0S 4.6LA Pesawat Terbang Unmanned Aerial Vehicle (UAV)

Quantum Teknika, 2021
Technological progress is evidenced by the creation of sophisticated equipment made to simplify human life. One of the advanced equipment continuously developed is an uncrewed aircraft called the Unmanned Aerial Vehicle (UAV). This study used an Unmanned
Sotya Anggroro
doaj   +1 more source

The Feasibility of Counting Songbirds Using Unmanned Aerial Vehicles

, 2017
Obtaining unbiased survey data for vocal bird species is inherently challenging due to observer biases, habitat coverage biases, and logistical constraints.
Barr, Janine M., Wilson, Andrew M., Zagorski, Megan E.   +2 more
core   +1 more source

Mathematical modeling and vertical flight control of a tilt-wing UAV [PDF]

, 2012
This paper presents a mathematical model and vertical flight control algorithms for a new tilt-wing unmanned aerial vehicle (UAV). The vehicle is capable of vertical take-off and landing (VTOL).
Aksit, Mahmut Faruk, Akşit, Mahmut Faruk, Cetinsoy, Ertugrul, Gulez, Kayhan, Gülez, Kayhan, Hancer, Cevdet, Hançer, Cevdet, Kandemir, İlyas, Kandemir, Ilyas, Oner, Kaan Taha, Sirimoglu, Efe, Sırımoğlu, Efe, Unel, Mustafa, Çetinsoy, Ertuğrul, Öner, Kaan Taha, Ünel, Mustafa   +15 more
core   +1 more source

UAV-assisted cooperative downlink NOMA with virtual full-duplex operation

ICT Express, 2019
In this paper, we consider an unmanned aerial vehicle (UAV)-assisted downlink cellular network consisting of a single base station (BS), two mobile stations (MSs) with N antennas, and K UAV relay stations (RSs). We assume that there exists no direct link
Jeong Seon Yeom, Young-bin Kim, Bang Chul Jung   +2 more
doaj   +1 more source

Unmanned Aerial Vehicles (UAV) [PDF]

, 2014
It is envisioned by the FAA that by 2016 UAVs will be flying in the NAS in fairly large numbers. There will be an increased need for TE potential hazards cannot be easily mitigated by aircrew action. Human factors and workload must be evaluated with respect to the envisioned mission, which may require long missions at remote sites.
openaire   +1 more source

Predicting growing stock volume of Eucalyptus plantations using 3-D point clouds derived from UAV imagery and ALS data [PDF]

, 2019
Estimating forest inventory variables is important in monitoring forest resources and mitigating climate change. In this respect, forest managers require flexible, non-destructive methods for estimating volume and biomass.
Botequim, Brigite, Cardil, Adrian, Cozensa, Diogo N., Diaz-Varela, Ramón, González-Ferreiro, Eduardo, Guerra-Hernández, Juan, Silva, Carlos Alberto, Silva, Margarida, Soares, Paula   +8 more
core   +2 more sources

Enhanced Spectral Efficiency in RIS-Assisted MIMO Systems Through Joint Precoding and RIS Configuration

IEEE Access
Reconfigurable Intelligent Surfaces (RIS) offer a promising solution to enhance wireless communication performance, particularly for 6G networks. This paper proposes a unified joint optimization framework to enhance spectral efficiency in reconfigurable ...
Mohammed Adil Abbas, Aqiel N. Almamori, Ahmed Jumaa Lafta, Asaad H. Sahar   +3 more
doaj   +1 more source

A Survey of Air-to-Ground Propagation Channel Modeling for Unmanned Aerial Vehicles

, 2018
In recent years, there has been a dramatic increase in the use of unmanned aerial vehicles (UAVs), particularly for small UAVs, due to their affordable prices, ease of availability, and ease of operability.
Aboudebra A., Ahmed N., Alzenad Mohamed, Alzenad Mohamed, Al‐Hourani A., Amorim R., Amorim R., Asadpour M., Athukoralage Dasun, Azari M. M., Bandoim Lana, Blandino Steve, Bluemm Christian, Bohagen Frode, Bor‐Yaliniz R Irem, Cai X., Chandhar P., Chen J., Chen J., Cheng Chen‐Mou, Cheng Xiang, Child JR, Daniel Kai, David Blom John, Desjardins Jeff, Essaadali R., Feng Qixing, Gao Xijun, Gates B. G., George Pierce Jones IV, Goddemeier N., Goddemeier Niklas, Gulfam S. M., Gulfam S. M., Hemanth Kumar Zhiqiang Wu, Ibrahim M., Jackson B. R. P., Jamal Hosseinali, Jiang F., Johnsson J., Joo Park Pyung, Kalantari E., Kaul S., Kawamata F., Kerczewski Bob, Khawaja W., Khawaja Wahab, Khawaja Wahab, Khawaja Wahab, Kovacs I., Ksendzov Alexander, Kung H. T., Kunisch J., Kvicera Milan, Lamiano D. F., Lemos Cid E., Levis Curt, Lin X., Lyu J., Malik W. Q., Matolak D. W., Matolak D. W., Matolak D. W., Matolak D. W., Matolak D. W., Matolak D. W., Matolak D. W., Matolak David W, Matolak David W., Matolak David W., Matolak David W., Newhall W. G., Ono F., Paier A., Pavel Pechac Michal Simunek, Rappaport T. S., Ravi V. V. C., Rieth D., Romeu J., Ruddle A. R., Schneckenburger N., Sharp C. S., Shim D. H., Song Meng Yu, Sun R., Sun Ruoyu, Sun Ruoyu, Takizawa K., Tavares T., Teng E., Tu H. D., Vahidi Vahid, Walter Michael, Wentz Michael, White F., Wu Y., Yang J., Yanmaz Evşen, Yanmaz Evşen, Zelenỳ Jan, Zhang Chao, Zheng Yi   +101 more
core   +1 more source

Application of NDT thermographic imaging of aerospace structures [PDF]

, 2019
This work aims to address the effectiveness and challenges of Non-Destructive Testing (NDT) inspection and improve the detection of defects without causing damage to the material or operator.
Avdelidis, N. P., Davis, M. J., Deane, S., Ibarra-Castanedo, C., Mackley, T., Maldague, X., Tsourdos, A., Williamson, A. A., Yazdani Nezhad, H., Zhang, H.   +9 more
core   +2 more sources