Results 31 to 40 of about 286,840 (295)

Cosmological Constraints from the Anisotropic Clustering Analysis using BOSS DR9

, 2013
Our observations of the Universe are fundamentally anisotropic, with data from galaxies separated transverse to the line of sight coming from the same epoch while that from galaxies separated parallel to the line of sight coming from different times ...
Linder, Eric V., Oh, MinJi, Okumura, Teppei, Sabiu, Cristiano G., Song, Yong-Seon   +4 more
core   +1 more source

Inertial measurement unit–aided dual-frequency radio frequency identification localization in line-of-sight and non-line-of-sight hybrid environment

International Journal of Distributed Sensor Networks, 2018
The mitigation of non-line-of-sight propagation conditions is one of main challenges in wireless signal–based indoor localization. When radio frequency identification localization technology is applied in applications, the received signal strength ...
Jie Wu, Minghua Zhu, Bo Xiao, Wei He
doaj   +1 more source

Optimum Model for Tracking of Moving Objects

Pakistan Journal of Engineering & Technology, 2023
 In wireless communication, it is a challenge to find the accurate position of moving objects. The presented work proposes the GPS receiver to measure the position and velocity of moving objects.
Muzaffar Hussain, Lubna Farhi, Farhan Ur Rehman   +2 more
doaj   +1 more source

A mobile localization method based on a robust extend Kalman filter and improved M-estimation in Internet of things

International Journal of Distributed Sensor Networks, 2020
As the key technology for Internet of things, wireless sensor networks have received more attentions in recent years. Mobile localization is one of the significant topics in wireless sensor networks.
Nan Hu, Chuan Lin, Fangjun Luan, Chengdong Wu, Qi Song, Li Chen   +5 more
doaj   +1 more source

CO Line Emission and Absorption from the HL Tau Disk: Where is all the dust?

, 2005
We present high-resolution infrared spectra of HL Tau, a heavily embedded young star. The spectra exhibit broad emission lines of hot CO gas as well as narrow absorption lines of cold CO gas. The column density for this cooler material (7.5+/-0.2 x 10^18
Carr J. S., Craig Kulesa, Monin J. L., Sean D. Brittain, Terrence W. Rettig, Theodore Simon, Whittet D. C. B., Whittet D. C. B.   +7 more
core   +1 more source

Understanding the Geometry of Astrophysical Magnetic Fields

, 2009
Faraday rotation measurements have provided an invaluable technique with which to measure the properties of astrophysical magnetized plasmas. Unfortunately, typical observations provide information only about the density-weighted average of the magnetic ...
Agol, Avery E. Broderick, Bahcall, Bastian, Bjornsson, Broderick, Budden, Budden, Crutcher, Falcke, Ghez, Gillessen, Ginzburg, Han, Jorstad, Kharb, Lacki, Lang, LaRosa, Law, Lister, Lister, Lister, Lister, Loeb, Macquart, Manchester, Mancuso, Marrone, Porcas, Quataert, Roger D. Blandford, Taylor, Taylor, Taylor, Thompson, Udomprasert, Uyaniker, Wilson, Yuan, Yusef-Zadeh, Zavala, Zavala, Zheleznyakov, Zheleznyakov   +44 more
core   +1 more source

Empowering IoT: leveraging data sensor communication with LoRAWAN in diverse environments

Acta Polytechnica
The Internet of Things (IoT) connects countless devices, such as sensors and actuators, necessitating an efficient long-range communication technology.
Noprianto Noprianto, Habibie Ed Dien, Septian Enggar Sukmana, Fayyadh Al Baity, Mustika Mentari   +4 more
doaj   +1 more source

Measurements and Models of 915 MHz LoRa Radio Propagation in an Underground Gold Mine

Sensors, 2022
Underground mining increasingly relies on wireless communications for its operations. The move to automating many underground mining processes makes an understanding of the propagation characteristics of key wireless technologies underground a topic of ...
Philip Branch
doaj   +1 more source

Non-line of Sight Transient Rendering

Jornada de Jóvenes Investigadores del I3A, 2022
Non-line of sight imaging reconstructs hidden geometry using time-resolved measurements of indirect diffuse reflections emitted by a laser. To help develop new applications, we simulate light transport in these occluded scenes and introduce a set of simple, yet effective subpath sampling techniques for efficiency, with an open-source implementation.
Royo, Diego, García, Jorge, Muñoz, Adolfo, Jarabo, Adrian   +3 more
openaire   +3 more sources

Optimal Constrained Wireless Emergency Network Antennae Placement [PDF]

, 2018
With increasing number of mobile devices, newly introduced smart devices, and the Internet of things (IoT) sensors, the current microwave frequency spectrum is getting rapidly congested.
Gaikwad, Swapnil Mohan
core   +1 more source