Results 31 to 40 of about 692,979 (283)

Power Quality Issues and Mitigation for Electric Grids with Wind Power Penetration

Applied Sciences, 2020
Large penetration of wind energy systems into electric-grids results in many power quality problems. This paper presents a classification of power quality issues, namely harmonics and short-duration voltage variation observed due to the integration of ...
Sulaiman A. Almohaimeed, Mamdouh Abdel-Akher   +1 more
doaj   +1 more source

Numerical Algorithm for Dynamic Impedance of Bridge Pile-Group Foundation and Its Validation

Algorithms, 2021
The characteristics of bridge pile-group foundation have a significant influence on the dynamic performance of the superstructure. Most of the existing analysis methods for the pile-group foundation impedance take the trait of strong specialty, which ...
Chenyu Wang, Hong Qiao, Yi Wang, Xianting Du   +3 more
doaj   +1 more source

Spherical Orbifolds for Cosmic Topology [PDF]

, 2012
Harmonic analysis is a tool to infer cosmic topology from the measured astrophysical cosmic microwave background CMB radiation. For overall positive curvature, Platonic spherical manifolds are candidates for this analysis.
Aurich R, Coxeter H S M, Edmonds A R, Einstein A, Kramer P, Kramer P, Kramer P, Kramer P, Kramer P, Kramer P, Kramer P, Kramer P, Larson D, Laue M v, Lax M, Misner Ch W, Peter Kramer, Ratcliffe J G, Seifert H, Sommerville D M Y, Weeks J, Wolf J A   +21 more
core   +1 more source

The HIT Network for Children and Adolescents With CNS Tumors Facilitates Improvements of Diagnostic Assessments, Multimodal Treatments, Individual Counseling, and Research in Germany, Austria, and Switzerland

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background The HIT network was established in 2000 to create a population‐based structure aiming to improve survival rates and reduce late effects for children with central nervous system (CNS) tumors by conducting comprehensive clinical trials.
Stefan Rutkowski, Michael C. Frühwald, Gudrun Fleischhack, Stephan Tippelt, Pablo Hernáiz‐Driever, Olaf Witt, Astrid Gnekow, Christof Kramm, Matthias Eyrich, Johannes E. A. Wolf, Hermann Müller, Carsten Friedrich, Uwe R. Kordes, Denise Obrecht‐Sturm, Petra Ketteler, Barbara von Zezschwitz, Pascal Johann, Dominik Sturm, Karoline Nemes, Stefan Schönberger, Till Milde, Brigitte Bison, Monika Warmuth‐Metz, Torsten Pietsch, Ulrich Schüller, Arend Koch, David Capper, Martin Hasselblatt, Christian Thomas, Christian Hagel, Stefan M. Pfister, Felix Sahm, David T. W. Jones, Martin U. Schuhmann, Jürgen Krauss, Pedram Emami, Ahmed El Damaty, Rolf D. Kortmann, Rudolf Schwarz, Jürgen Debus, Mechthild Krause, Fabian Pohl, Holger Ottensmeier, Lisa Bußenius, Katja Baust, Andreas Faldum, Cecile Ronckers, Desiree Grabow, Martin Benesch, Thomas Perwein, Karin Dieckmann, Irene Slavc, Johannes Gojo, Nicolas U. Gerber, André O. von Bueren, Katrin Scheinemann, Gabriele Calaminus, Beate Timmermann, Ulrich‐Wilhelm Thomale, Martin Mynarek   +59 more
wiley   +1 more source

Enerji Kalitesi Açısından Harmonikli Bir Sağlık Tesisinin İncelenmesi

Düzce Üniversitesi Bilim ve Teknoloji Dergisi, 2019
Elektrik güç sistemlerinde ve tesislerinde enerjinin kalitesini belirlemede temel unsurlardan birideharmoniklerdir. Olumsuz etkilere neden olan bu harmoniklerin etkilerin yok edilmesi gerekmektedir.
Özkan Alkan, Salih Tosun, Özge Alkan
doaj   +1 more source

Quantifying the Response of German Forests to Drought Events via Satellite Imagery

Remote Sensing, 2021
Forest systems provide crucial ecosystem functions to our environment, such as balancing carbon stocks and influencing the local, regional and global climate.
Marius Philipp, Martin Wegmann, Carina Kübert-Flock   +2 more
doaj   +1 more source

Super-harmonic injection locking of nano-contact spin-torque vortex oscillators

, 2016
Super-harmonic injection locking of single nano-contact (NC) spin-torque vortex oscillators (STVOs) subject to a small microwave current has been explored. Frequency locking was observed up to the fourth harmonic of the STVO fundamental frequency $f_{0}$
Dürrenfeld, P., Hicken, R. J., Hrkac, G., Keatley, P. S., Mohseni, S. M., Sani, S. R., Åkerman, J.   +6 more
core   +1 more source

Carcinomas and Carcinoid Tumors of the Lungs and Bronchi in Children and Adolescents: The EXPeRT Recommendations

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Primary lung carcinomas and bronchial carcinoid tumors (BC) are very rare malignancies in childhood. While typical BC and mucoepidermoid carcinomas are mostly low‐grade, localized tumors with a more favorable prognosis than in adults, necessitating avoidance of overtreatment, adenocarcinomas of the lung are often diagnosed at advanced disease ...
Michael Abele, Calogero Virgone, Michaela Kuhlen, Sabine Irtan, Yves Reguerre, Malgorzata Krawczyk, Ewa Bien, Tal Ben‐Ami, Maja Cesen, Ricardo Lopez‐Almaraz, Andrea Ferrari, Gianni Bisogno, Dominik T. Schneider, Abbas Agaimy, Constantin Lapa, Hubert Ducou le Pointe, Rainer Claus, Catherine Daniel, Ines B. Brecht, Daniel Orbach   +19 more
wiley   +1 more source

Assessment of Ocean Circulation Characteristics off the West Coast of Ireland Using HF Radar

Remote Sensing, 2023
Research on coastal ocean circulation patterns over long time periods is significant for various marine endeavors: environmental protection, coastal engineering construction, and marine renewable energy extraction.
Lei Ren, Guangwei Pan, Lingna Yang, Yaqi Wang, Gang Zheng, Peng Yao, Qin Zhu, Zhenchang Zhu, Michael Hartnett   +8 more
doaj   +1 more source

Harmonic analysis for real spherical spaces

, 2017
We give an introduction to basic harmonic analysis and representation theory for homogeneous spaces $Z=G/H$ attached to a real reductive Lie group $G$.
Krötz, Bernhard, Schlichtkrull, Henrik
core   +1 more source