Results 41 to 50 of about 60,417 (275)

A Revised Broad-Line Region Radius and Black Hole Mass for the Narrow-Line Seyfert 1 NGC 4051 [PDF]

, 2008
We present the first results from a high sampling rate, multi-month reverberation mapping campaign undertaken primarily at MDM Observatory with supporting observations from telescopes around the world.
A. E. Watkins, A. K. Kruse, B. M. Peterson, Bennert, Bentz, Bentz, Bentz, Bentz, Boller, C. H. Hedrick, C. M. Gaskell, C. Unterborn, Chonis, Christopoulou, D. J. Brokofsky, D. W. Atlee, Denney, Denney, E. A. Petersen, E. S. Klimek, Edelson, Ferrarese, Ferrarese, Fine, Gebhardt, Gebhardt, Hopkins, J. B. Lamb, J. C. Bird, J. D. Eastman, J. J. Tobin, K. D. Denney, K. J. Sakata, K. Leighly, Kaspi, Kaspi, Klimek, Kollmeier, Kormendy, L. C. Watson, M. C. Bentz, M. Dietrich, M. L. Comins, M. Vestergaard, Magorrian, Marconi, Marconi, Minezaki, Nelson, Netzer, Onken, P. Peterson, Peterson, Peterson, Peterson, Peterson, R. W. Pogge, Rodriguez-Pascual, Russell, S. A. Klimanov, S. G. Sergeev, S. Poindexter, S. V. Nazarov, Sergeev, Shankar, Shen, Shen, Suganuma, T. Minezaki, Tremaine, Ulrich, V. T. Doroshenko, Vestergaard, Vestergaard, Vestergaard, Wandel, Welsh, Y. S. Efimov, Y. Schlesinger, Y. Yoshii, Yoshii, Yoshii   +81 more
core   +5 more sources

Knowledge and attitudes of teachers regarding the impact of classroom acoustics on speech perception and learning

South African Journal of Communication Disorders, 2009
This study investigated the knowledge and attitude of primary school teachers regarding the impact of poor classroom acoustics on learners’ speech perception and learning in class.
Lebogang Ramma
doaj   +1 more source

Determination of the Reverberation Time Using the Measurement of Sound Decay Curves

Applied Sciences, 2023
In the measurements of reverberation time, measurement methods of different accuracy are used depending on the room. For ordinary rooms, the measurements are made using the interrupted noise method, which consists of determining the decay curve after ...
Artur Nowoświat
doaj   +1 more source

Spring Reverberation: A Physical Perspective [PDF]

, 2009
Spring-based artificial reverberation was one of the earliest attempts at compact replication of room-like reverberation for studio use. The popularity and unique sound of this effect have given it a status and desirability apart from its original use ...
Bilbao, Stefan, Parker, Julian
core   +1 more source

Simultaneous spectral and reverberation modelling of relativistic reflection in Mrk 335 [PDF]

, 2015
We present an X-ray spectral and timing model to investigate the broad and variable iron line seen in the high flux state of Mrk 335. The model consists of a variable X-ray source positioned along the rotation axis of the black hole that illuminates the ...
Chainakun, P., Young, A. J.
core   +3 more sources

Pulmonary Dysfunction Is Associated With Sleep Study Abnormalities in Children With Sickle Cell Disease: A Multicenter Study

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Introduction Pulmonary dysfunction and sleep abnormalities are common in children with sickle cell disease (SCD) and are associated with worse clinical outcomes. Whether spirometry abnormalities are associated with polysomnography (PSG) findings remains unclear.
Ammar Saadoon Alishlash, Anis Rabbani Nourani, A. K. M. Fazlur Rahman, Dima Ezmigna, Tarig Ali‐Dinar   +4 more
wiley   +1 more source

Cascaded-Filter-Based Reverberation Suppression Method of Short-Pulse Continuous Wave for Active Sonar

Remote Sensing
Reverberation is the main background interference in active sonar and seriously interferes with the extraction of the target echo. Active sonar systems can use short-pulse continuous wave (CW) signals to reduce the reverberation intensity.
Yonglin Cui, Shuhan Liao, Juncheng Gao, Haidong Zhu, Nengtong Zhao, An Luo   +5 more
doaj   +1 more source

The dust origin of the Broad Line Region and the model consequences for AGN unification scheme [PDF]

, 2015
We propose a very simple physical mechanism responsible for the formation of the Low Ionization Line part of the Broad Line Region in Active Galactic Nuclei.
Adhikari, Tek P., Czerny, Bozena, Hryniewicz, Krzysztof, Krupa, Magdalena, Kurcz, Agnieszka, Modzelewska, Justyna, Nikolajuk, Marek, Petrogalli, Francesco, Pych, Wojtek, Zycki, Piotr T.   +9 more
core   +1 more source

Financial Burden Associated With Hospitalisation Among Families of Childhood Brain Tumours in Australia

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Families of children with cancer experience significant financial strain, even with universal healthcare. Indirect costs, such as productivity losses and non‐medical expenses, are rarely included in economic evaluations, and little is known about how effectively financial aid programmes alleviate this burden. Childhood brain tumours
Megumi Lim, Natalie Bradford, David Brain, Sameera Senanayake, Sanjeewa Kularatna, Kate Young, Christine Cashion, Tim Hassall, Susanna Cramb   +8 more
wiley   +1 more source

Central Masses and Broad-Line Region Sizes of Active Galactic Nuclei: I. Comparing the Photoionization and Reverberation Techniques

, 1999
The masses and emission-line region sizes of Active Galactic Nuclei (AGNs) can be measured by ``reverberation-mapping'' (measuring the lag of the emission-line luminosity after changes in the continuum). We use tis technique to calibrate similar size and
A. Wandel, Alloin D., B. M. Peterson, Boller Th., Laor A., M. A. Malkan, Rokaki E., Rokaki E., Wandel A.   +8 more
core   +2 more sources