Results 91 to 100 of about 19,320 (310)

Analysis of the structural complexity of Crab Nebula observed at radio frequency using a multifractal approach

Journal of Physics: Complexity
The Crab Nebula is an astrophysical system that exhibits complex morphological patterns at different observing frequencies. We carry out a systematic investigation of the structural complexity of the nebula using publicly available imaging data at radio ...
Athokpam Langlen Chanu, Pravabati Chingangbam, Fazlu Rahman, R K Brojen Singh, Preeti Kharb   +4 more
doaj   +1 more source

Are Pound and Euro the Same Currency? - Updated [PDF]

Based on long range dependence, some analysts claim that the exchange rate time series of the pound sterling and of an artificially extended euro have been locked together for years despite daily changes [1, 9].
Da Silva, Sergio, Figueiredo, Annibal, Gleria, Iram, Matsushita, Raul   +3 more
core   +1 more source

Long-term correlations and multifractal nature in the intertrade durations of a liquid Chinese stock and its warrant

, 2010
Intertrade duration of equities is an important financial measure characterizing the trading activities, which is defined as the waiting time between successive trades of an equity.
Alessio, Alvarez-Ramirez, Anatolyev, Arianos, Ausloos, Bacry, Balcilar, Barabási, Bartiromo, Bashan, Calvet, Carbone, Carbone, Carbone, Castro e Silva, Chen, Eisler, Eisler, Engle, Engle, Engle, Engle, Frisch, Ghashghaie, Gu, Górski, Halsey, He, He, Heneghan, Holschneider, Hu, Hurst, Ivanov, Ivanova, Jasiak, Jiang, Jiang, Jiang, Jiang, Jiang, Kantelhardt, Kantelhardt, Kim, Kim, Kwapień, Lee, Lee, Lim, Mainardi, Mandelbrot, Mandelbrot, Mandelbrot, Mantegna, Masoliver, Masoliver, Matia, Matsushita, Montanari, Muzy, Muzy, Muzy, Oświȩcimka, Oświȩcimka, Peng, Peng, Politi, Politi, Raberto, Sabatelli, Sazuka, Scalas, Scalas, Scalas, Schmitt, Serletis, Serletis, Serletis, Struzik, Su, Su, Talkner, Talkner, Taqqu, Tsallis, Tsallis, Turiel, Turiel, Vandewalle, Vandewalle, Varotsos, Vázquez, Wei-Xing Zhou, Xu, Yong-Ping Ruan, Yoon, Zhou   +96 more
core   +2 more sources

Spatiotemporal Droughts Propagation and Direct Driving Variables Under Climate Change Projections: A Case Study of Tunisia

International Journal of Climatology, EarlyView.
Drought spatiotemporal propagation and direct driving variables are assessed at multiple time steps with high spatial resolution using various drought indices (SPI, SPEI and SPDI) and entropy based mutual information under an ensemble of climate change projections over Tunisia. ABSTRACT Projecting drought occurrence and spatiotemporal propagation under
Haykel Sellami
wiley   +1 more source

Detection of Pipeline Leaks Using Fractal Analysis of Acoustic Signals

Fractal and Fractional
In this paper, the possibility of using monofractal and multifractal analysis of acoustic signals of pipelines to detect leaks is considered. An experimental stand has been created to study the fractal characteristics of acoustic signals of pipelines ...
Ayrat Zagretdinov, Shamil Ziganshin, Eugenia Izmailova, Yuri Vankov, Ilya Klyukin, Roman Alexandrov   +5 more
doaj   +1 more source

Volatility distribution in the S&P500 Stock Index

, 1997
We study the volatility of the S&P500 stock index from 1984 to 1996 and find that the volatility distribution can be very well described by a log-normal function.
Admati, Beran, Bollerslev, Bouchaud, Bunde, C.-K. Peng, Dacorogna, Ding, Ekman, Engle, Fama, Ghashgaie, Granger, H. Eugene Stanley, Harris, Liu, Mantegna, Mantegna, Mantegna, Martin Meyer, Peng, Pierre Cizeau, Sornette, Wood, Yanhui Liu   +24 more
core   +1 more source

Last‐minute coordination: Adapting to demand to support last‐mile operations

Journal of Operations Management, Volume 71, Issue 2, Page 176-194, March 2025.
Abstract In the highly competitive e‐commerce industry, customer‐facing warehouses are crucial as the “order penetration points” for e‐commerce last‐mile operations. This research examines how warehouses use last‐minute coordination, an unstructured mechanism, to ensure sufficient inventory at the order penetration points. Previous research has focused
Kedong Chen, Hung‐Chung Su, Kevin Linderman, William Li   +3 more
wiley   +1 more source

Aquatic and Littoral Successions in Various Post‐Mining Sites—Patterns and Possible Use in Ecological Restoration

Land Degradation &Development, EarlyView.
ABSTRACT Vegetation succession in aquatic and littoral habitats has received much less attention than terrestrial habitats have. We sampled differently aged successional stages at five different types of post‐mining sites, that is, sandpits, stone quarries, clay quarries, brown coal spoil heaps and black coal subsidences, across the Czech Republic ...
Anna Müllerová, Klára Řehounková, Karel Prach   +2 more
wiley   +1 more source

Detrended fluctuation analysis as a statistical tool to monitor the climate

, 2004
Detrended fluctuation analysis is used to investigate power law relationship between the monthly averages of the maximum daily temperatures for different locations in the western US.
, Bodri L, Bodri L, Eichner J, Fluegeman R H, Ivanova K, Ivanova K, Joachims T, Koeppen W, Koscielny-Bunde E, Koscielny-Bunde E Kantelhardt J W Braun P Bunde A Havlin S, Kurnaz M L, Livina V, M L Kurnaz, Mandelbrot B B, Mandelbrot B B, Peng C K, Talkner P, Vapnik V N, Vjushin D, Wang Y   +20 more
core   +1 more source

A Hybrid RF Coil for Whole‐Brain Imaging in Non‐Human Primates at 7 T

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Ultra‐high field MRI (≥ 7 T) offers unprecedented potential for mapping non‐human primate (NHP) brain function. However, complex electromagnetic systems are required to meet the challenges of UHF imaging and the mechanical demands of awake NHP studies.
Elias Djaballah, Éric Giacomini, Paul‐François Gapais, Michel Luong, Alexis Amadon, Qi Zhu   +5 more
wiley   +1 more source