Results 111 to 120 of about 37,425 (308)

The Doppler Spectra of Medium Grazing Angle Sea Clutter; Part 1: Characterisation

, 2016
This paper is concerned with the characterisation of Doppler spectra from high range resolution X-band radar sea clutter observed from an airborne platform over the range of grazing angles, 15° to 45°.
Rosenberg, L, Ritchie, MA, Watts, S, Bocquet, S   +3 more
core  

Implant‐related orofacial pain managed with implant apicoectomy: A case report

Clinical Advances in Periodontics, EarlyView.
Abstract Background In recent years, the use of implants has emerged as a widely accepted method for the replacement of missing teeth. Although rare, chronic pain associated with implant placement has been reported in the literature. Conversely, apicoectomy, the removal of the apical portion has been integrated into the implantology field in cases with
Oscar Durán‐Garnica, Karen Villarreal‐Arizpe, Hong Chen, Hsun‐Liang Chan, Guo‐Liang Cheng   +4 more
wiley   +1 more source

Joint estimation of target time delay and Doppler frequency in passive radar system

Tongxin xuebao, 2015
A novel method of joint estimation of time delay and Doppler shift in passive radar system based on short-time fractional Fourier transform (STFRFT) was proposed.Firstly,the mathematical expression of the STFRFT time-frequency resolution was studied for ...
ANGPeng W, IUTian-shuang Q, IJing-chun L, ANHai-feng T   +3 more
doaj   +2 more sources

Evaluasi Kinerja Sistem Gaussian Minimum Shift Keying (GMSK) untuk Pengiriman Citra dari Satelit Nano ke Stasiun Bumi

Jurnal Teknik ITS, 2012
Satelit nano IiNUSAT merupakan satelit nano pertama yang dibuat dan diluncurkan oleh mahasiswa dari beberapa perguruan tinggi di Indonesia. Riset terkait satelit nano IiNUSAT telah mencapai tahap kedua yang bernama IiNUSAT II.
Muhammad Rizal Habibi, Gamantyo Hendrantoro, Devy Kuswidiastuti   +2 more
doaj  

Transcatheter Repair of Sinus Venosus Defect Using a 12‐zig Covered Cheatham‐Platinum Stent in Large Superior Vena Cava—Right Atrium Junctions: Early Multicenter Experience

Catheterization and Cardiovascular Interventions, EarlyView.
ABSTRACT Sinus venosus defect (SVD) is a rare congenital heart anomaly characterised by an abnormal communication between the atria, often associated with partial anomalous pulmonary venous connection (PAPVC). Traditional surgical repair carries significant risks, prompting exploration into less invasive transcatheter approaches.
Alberto Fuensalida, Eric Rosenthal, Saleha Kabir, Gergely Szantho, Sophia Yong, Demetris Taliotis, Mark Turner, Radwa Bedair   +7 more
wiley   +1 more source

On Doppler-Shift Attenuation Measurements

, 1972
An improved analysis of Doppler-shifted γ spectra is outlined. This analysis is exact within the Lindhard theory of slowing down of heavy ions in solids.With an approximate cross section applicable at low energies, the equations become independent of ...
K. B. Winterbon
core   +1 more source

Unveiling the Microvasculature: The Index of Microcirculatory Resistance and Its Expanding Role in Cardiovascular Care

Catheterization and Cardiovascular Interventions, EarlyView.
ABSTRACT Index of microcirculatory resistance (IMR) is a cutting‐edge, wire‐based tool that advances the capability assessment of coronary microvascular function. By utilizing distal coronary pressure and mean transit time under maximal hyperemia, IMR delivers consistent, reproducible insights into the microvasculature's dynamic health.
Joanna Sohn, Matthew A. Soderstrom, Ariana Ramirez, John‐Henry Dean, Raj Shah, Debanshu Roy, Kenneth Stone, Ariel Vinas, Bryan Ramsey, Charles Lin, Robert Chilton   +10 more
wiley   +1 more source

Clinical and Echocardiographic Outcomes After Implantation of the ALLEGRA Transcatheter Valve Using the Fully Repositionable IMPERIA Delivery System: One‐Year Results of the EMPIRE I Study

Catheterization and Cardiovascular Interventions, EarlyView.
ABSTRACT Background The EMPIRE I study assessed the early (30 days) safety and efficacy of a new fully repositionable delivery system (IMPERIA) for the commercially available ALLEGRA transcatheter aortic valve in patients with either severe native aortic stenosis or a degenerated surgical bioprosthesis.
José Antonio Baz, Claire B. Ren, Christof Burgdorf, Christian Frerker, Ignacio Cruz‐González, Joan Antoni Gómez, José Maria Hernândez, Pilar Jimenez, Ernest Spitzer, Pim Tonino, Pieter Vriesendorp, Nicolas van Mieghem, Samuel Copt, Anders Jönsson, Keith G. Oldroyd, Nicolas Doll   +15 more
wiley   +1 more source

Teaching the Doppler effect in astrophysics

, 2017
\ud \ud The Doppler effect is a shift in the frequency of waves emitted from an object moving relative to the observer. By observing and analysing the Doppler shift in electromagnetic waves from astronomical objects, astronomers gain greater insight into
Cowley, Michael, Hughes, Stephen W.
core   +1 more source

Numerical investigation on the influence of mesoscopic deformation on contact area and hydraulic aperture to fracture seepage

Deep Underground Science and Engineering, EarlyView.
Fluid flow through a single fracture is commonly described by the cubic law. However, deviations from this model are expected because natural fracture surfaces are rough and in contact with each other in discrete regions. In this study, the interactions between fracture closure, contact area, and hydraulic characterization of mesoscopic‐scale rough ...
Chenghao Han, Yuanlin Bai, Weijie Zhang, Jicheng Zhang, Hongfa Ma, Weiye Li   +5 more
wiley   +1 more source