Results 81 to 90 of about 35,657 (302)

Scintillation Studies of Transionospheric Signal [PDF]

, 1988
37-41Single scattering theory is applied to the problem of ionospheric scintillations. The characteristics of scintillation indices computed with two power spectra, namely, Gaussian and Kolmogorov, are studied in detail.
Reddy, B M, Mohan, Mahendra
core  

Mixing‐Driven Defects and Composition Evolution in Multi‐Material Metal Additive Manufacturing

Advanced Science, EarlyView.
Operando synchrotron X‐ray imaging coupled with high‐fidelity multiphysics modeling uncovers how inter‐material mixing reshapes keyhole dynamics and drives distinct pore‐formation pathways in multi‐material laser powder bed fusion (LPBF). Composition‐dependent instabilities trigger defects, whereas rescanning suppresses porosity and homogenizes Cu ...
Zhilang Zhang, Steve Gaudez, Mario Togni, Steven Van Petegem, Markus Bambach, Mamzi Afrasiabi   +5 more
wiley   +1 more source

Development of a Scintillation Fiber Detector for Determination of Directional Distribution of Radiations

, 1997
P(論文)The purposes of the radiation measurements are the determination of kinds of radiation, intensity of energy, and direction of incident radiations.
占部, 逸正, 42989, 佐川, 宏幸, 42988   +3 more
core  

RADIO STAR SCINTILLATION NEAR THE AURORAL ZONE

, 1964
The Queen's University Radio Observatory at Kingston, Ontario, geomagnetic latitude 55° 33′ N, is particularly well situated for radio star scintillation observations looking both north into the auroral zone and south away from the auroral zone.
W. D. Ryan
core   +1 more source

A comparison of satellite scintillation measurements with HF radar backscatter characteristics [PDF]

, 2005
International audienceWe examine the correspondence between high latitude ionospheric scintillation measurements made at 250MHz with the occurrence of 10MHz HF coherent radar backscatter, on 13 and 14 December 2002.
S. Basu, T. K. Yeoman, R. E. Sheehan (7659011), S. E. Milan, Milan, S. E., Sheehan, R. E., Stephen Eric Milan (7631354), Timothy Kenneth Yeoman (7635005), Basu, S., Yeoman, T. K., S. Basu (1815256), R. E. Sheehan   +11 more
core   +1 more source

Rare‐Earth Mediated Engineering in ZnSe@ZnS:Eu3+ to Simultaneously Achieve Structural Modulation and Atomic Eu Doping Sites for X‐Ray Imaging

Advanced Science, EarlyView.
A dual hard‐base anchoring strategy was developed to synthesize ZnSe@ZnS:Eu3+ quantum dots, leveraging fluoride‐oleylamine interactions to create surface atomic Eu doping sites. By precisely tuning temperature, Eu3+ concentration, and fluoride levels, we obtain morphologies ranging from tip growth to coupled flower‐like structures.
Jicun Ma, Chenhao Yang, Jiada Fan, Haorong Jiao, Jiawang Liu, Jialiang Xu, Hui Cai, Yinghui Wang, Boyuan Shen, Jiabin Cui   +9 more
wiley   +1 more source

From Materials to Medical Images: Translating Perovskite‐Based X‐Ray Detectors Toward Clinical Imaging

Advanced Science, EarlyView.
This review examines perovskite‐based X‐ray detectors from a materials‐to‐medical‐images perspective. Recent progress in perovskite‐based X‐ray detectors is discussed with emphasis on their relevance to clinical imaging. The key barriers to clinical implementation are analyzed.
Sibin Wang, Yongrui Yang, Kun Zhang, Xiaojuan Lu, Hong Yin, Yali Qiao, Xiaojia Zheng, Xiao Zhang, Yanlin Song   +8 more
wiley   +1 more source

Discussion of the Direct Detection Rx-power Distribution as derived from Intensity Statistics and Comparision with Measurements

, 2003
The intensity of a laser beam after propagation through turbulent media such as the atmosphere may follow different probability density functions (PDFs) depending on the fluctuation regime. For non-coherent receivers the aperture averaging effect reduces
Perlot, Nicolas, Bischl, Hermann, Giggenbach, Dirk, David, Florian   +3 more
core  

Ionospheric scintillation characteristics in IRNSS L5 and S-band signals [PDF]

, 2017
15-19Ionospheric scintillation is a common phenomenon observed over the low latitude Indian region. It occurs due to the rapid fluctuations in phase and amplitude of the signal and affects Global Navigation Satellite Systems (GNSS) very severely ...
Sujimol, M R, Shahana, K
core  

Ultra‐Radiostable Covalent Conformationally Interlocked Networks Enabling a Universal Radiometal‐Labeling Platform for Cancer Radioembolization

Advanced Science, EarlyView.
Conjugated poly(imide dioxime)‐based microspheres establish a radiometal coordination‐driven conformational interlocked network with ultra‐high radiostability. This platform enables low‐temperature, multi‐radionuclide labeling for SPECT/PET/MRI imaging and radionuclide therapy. Mechanistic insights from EXAFS and DFT reveal enhanced stability, while in
Xiao Xu, Zhenwen Zhao, Yangjie Wang, Zhigang Liu, Zhijie Liu, Xiaoling Li, Zhichen Mao, Lu Xu, Gan Lin, Gang Liu, Hongjuan Ma   +10 more
wiley   +1 more source