Results 51 to 60 of about 13,475 (217)

An Improved Split-Step Wavelet Transform Method for Anomalous Radio Wave Propagation Modelling [PDF]

, 2014
Anomalous tropospheric propagation caused by ducting phenomenon is a major problem in wireless communication. Thus, it is important to study the behavior of radio wave propagation in tropospheric ducts.
Iqbal, A., Jeoti, V.
core   +1 more source

On the Possibility of Detecting Evaporation Ducts Through GNSS Reflectometry

Remote Sensing
An evaporation duct is a kind of atmospheric event with a refractive index exceeding the curvature of the Earth, which mostly exists on the ocean surface.
Fu Li, Yueqiang Sun, Xianyi Wang, Junming Xia, Feixiong Huang, Qifei Du, Weihua Bai, Zhuoyan Wang, Tongsheng Qiu   +8 more
doaj   +1 more source

Analysis of the pathogenic factors and management of dry eye in ocular surface disorders [PDF]

, 2017
The tear film represents the interface between the eye and the environment. The alteration of the delicate balance that regulates the secretion and distribution of the tear film determines the dry eye (DE) syndrome. Despite having a multifactorial origin,
Albietz, Alio, Ambrosio, Djalilian, Dogru, Li, Nebbioso, Nebbioso, Patel, Rajan, Solomon, Suzuki, Toda, Wilson, Zhu   +14 more
core   +1 more source

Evaporation Duct Anomalies Caused by Mesoscale Eddies in the Kuroshio Extension

Geophysical Research Letters
Evaporation duct anomalies are always present above various oceanic processes, and their response to ubiquitous mesoscale eddies in the Kuroshio Extension region is quantitatively analyzed for the first time in this study using a synthetic analysis ...
Yuan Gao, Yongchui Zhang, Xiaofeng Zhao, Yang Shi, Xiangming Guo, Bo Wang   +5 more
doaj   +1 more source

Beyond the Horizon, Backhaul Connectivity for Offshore IoT Devices

Energies, 2021
The prevalent use of the Internet of Things (IoT) devices over the Sea, such as, on oil and gas platforms, cargo, and cruise ships, requires high-speed connectivity of these devices. Although satellite based backhaul links provide vast coverage, but they
Khurram Shabih Zaidi, Sadaf Hina, Muhammad Jawad, Ali Nawaz Khan, Muhammad Usman Shahid Khan, Haris Bin Pervaiz, Raheel Nawaz   +6 more
doaj   +1 more source

Fabrication process of a high temperature polymer matrix engine duct [PDF]

, 1985
The process that was used in the molding of an advanced composite outer by-pass duct planned for the F404 engine is discussed. This duct was developed as a potential replacement for the existing titanium duct in order to reduce both the weight and cost ...
Pratt, R. D., Wilson, A. J.
core   +1 more source

Diffuser/ejector system for a very high vacuum environment [PDF]

, 1984
Turbo jet engines are used to furnish the necessary high temperature, high volume, medium pressure gas to provide a high vacuum test environment at comparatively low cost for space engines at sea level.
Riggs, K. E., Wojciechowski, C. J.
core   +1 more source

Statistical Analysis of Atmospheric Ducts in the Yellow and Bohai Seas of China and Study of Their Electromagnetic Wave Propagation Characteristics

Atmosphere
Atmospheric ducts play a critical role in the propagation of electromagnetic waves by minimizing signal loss and extending transmission distances, which is essential for radar, communication, and navigation systems.
Xiao Yang, Lei Li, Leke Lin, Rui Zhang, Shuaishuai Liang, Zhenwei Zhao   +5 more
doaj   +1 more source

Refractivity variations and propagation at Ultra High Frequency

Results in Physics, 2017
Present framework is established to deal with the refractivity variations normally affected the radio waves propagation at different frequencies, ranges and different environments.
I. Alam, M. Najam-Ul-Islam, U. Mujahid, S.A.A. Shah, Rizwan Ul Haq   +4 more
doaj   +1 more source

Fuel distribution measurements in a model low NOx double annular combustor using laser induced fluorescence [PDF]

, 2010
Planar laser induced fluorescence (PLIF) was employed in a three sector, low NOx double annular combustor in order to characterise the combusting fuel spray.
Greenhalgh, D. A., Lockett, R. D.
core