Results 21 to 30 of about 234,218 (345)

Swift observations of the very intense flaring activity of Mrk 421 during 2006: I. Phenomenological picture of electron acceleration and predictions for the MeV/GeV emission [PDF]

open access: yes, 2009
We present results from a deep spectral analysis of all the Swift observations of Mrk 421 from April 2006 to July 2006, when it reached its largest X-ray flux recorded until 2006.
A. Tramacere   +52 more
core   +2 more sources

Spectral modeling for accelerated pH spectroscopy using EPR [PDF]

open access: yesJournal of Magnetic Resonance, 2012
A data modeling and processing method for electron paramagnetic resonance (EPR)-based pH spectroscopy is presented. The proposed method models the EPR spectrum of a pH-sensitive probe in both protonated and unprotonated forms. Under slow-exchange conditions, the EPR spectrum of a sample with an unknown pH value can be accurately represented by a ...
R, Ahmad, L C, Potter, V V, Khramtsov
openaire   +2 more sources

Ground motion prediction equations based on shallow crustal earthquakes in Georgia and the surrounding Caucasus

open access: yesEarthquake Science, 2022
Strong ground motions caused by earthquakes with magnitudes ranging from 3.5 to 6.9 and hypocentral distances of up to 300 km were recorded by local broadband stations and three-component accelerograms within Georgia’s enhanced digital seismic network ...
Nato Jorjiashvili   +4 more
doaj   +1 more source

HST optical spectral index map of the jet of 3C 273 [PDF]

open access: yes, 2001
We present HST images at 622 nm and 300 nm of the jet in 3C273 and determine the run of the optical spectral index at 0.2" along the jet. The smoothness of spectral index changes shows that the physical conditions are varying smoothly across the jet ...
Abraham   +41 more
core   +2 more sources

A Logic-Tree Approach for Probabilistic Seismic Hazard Assessment in the Administrative Region of Attica (Greece)

open access: yesApplied Sciences, 2023
Probabilistic Seismic Hazard Assessment (PSHA) was carried out for the administrative region of Attica (Greece). Peak Ground Acceleration (PGA) and Peak Ground Velocity (PGV) values were calculated for return periods of 475 and 950 years for five sub ...
George Kaviris   +8 more
doaj   +1 more source

Accelerating Consensus by Spectral Clustering and Polynomial Filters [PDF]

open access: yesIEEE Transactions on Control of Network Systems, 2017
It is known that polynomial filtering can accelerate the convergence towards average consensus on an undirected network. In this paper the gain of a second-order filtering is investigated. A set of graphs is determined for which consensus can be attained in finite time, and a preconditioner is proposed to adapt the undirected weights of any given graph
Apers, Simon, Sarlette, Alain
openaire   +5 more sources

2007 VE 2018 TÜRK DEPREM YÖNETMELİKLERİNE GÖRE SPEKTRAL KARAKTERİSTİKLERİN KARŞILAŞTIRILMASI: ESKİŞEHİR ÖRNEĞİ

open access: yesEskişehir Osmangazi Üniversitesi Mühendislik ve Mimarlık Fakültesi Dergisi, 2022
Tasarım aşamasında yapılara etkiyecek deprem yüklerinin belirlenebilmesi için statik ve dinamik analiz yöntemleri kullanılmaktadır. Statik analiz yöntemlerinden biri de tasarım ivme spektrumlarının hesaplanmasıdır.
Yücel Güney   +3 more
doaj   +1 more source

Implications of multiply-charged anomalous cosmic rays [PDF]

open access: yes, 2006
During the acceleration of anomalous cosmic rays (ACRs) some singly-charged ions are stripped of additional electrons. The resulting multiply-charged ions are accelerated more efficiently, and most ACRs with >=30 MeV/nuc are multiply-charged.
Mewaldt, R. A.
core   +1 more source

Active Galactic Nuclei as High Energy Engines [PDF]

open access: yes, 1999
Active Galactic Nuclei are considered as possible sites of cosmic ray acceleration and some of them have been observed as high energy gamma ray emitters (Blazars). There naturally comes an appealing idea that the acceleration of the highest energy cosmic
Aharonian   +31 more
core   +3 more sources

Probabilistic seismic hazard assessment of Nepal using multiple seismic source models

open access: yesEarth and Planetary Physics, 2018
The potential for devastating earthquakes in the Himalayan orogeny has long been recognized. The 2015 MW7.8 Gorkha, Nepal earthquake has heightened the likelihood that major earthquakes will occur along this orogenic belt in the future.
Md Moklesur Rahman, Ling Bai
doaj   +1 more source

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