Results 81 to 90 of about 2,448 (172)

Roads and Woody Vegetation Structure Are Associated With Chimpanzee (Pan troglodytes) Occurrence at Its Northern Range Limit

Journal of Biogeography, Volume 52, Issue 2, Page 294-303, February 2025.
ABSTRACT Aim The purported defining features of chimpanzee (Pan troglodytes) biogeography are sometimes simplistic and contradictory, yet we rely on these metrics to shape conservation and management planning for this endangered ape. We analysed the cover and configuration of woody vegetation at the northern margins of the species' range in Senegal to ...
Stacy Lindshield, Kelly Boyer Ontl, Maja Gašperšič, Assane Goudiaby, Papa Ibnou Ndiaye, Gray Tappan, Kaia J. Tombak, Erin Wessling, Jill D. Pruetz   +8 more
wiley   +1 more source

The origin of short-lived radionuclides and the astrophysical environment of solar system formation

, 2008
Based on early solar system abundances of short-lived radionuclides (SRs), such as $^{26}$Al (T$_{1/2} = 0.74$ Myr) and $^{60}$Fe (T$_{1/2} = 1.5$ Myr), it is often asserted that the Sun was born in a large stellar cluster, where a massive star ...
Amelin Y., Amelin Y., Anders Meibom, Boss A. P., de Graauw T., Knee L. B. G., Knodlseder J., Larson R. B., Matthieu Gounelle, Meyer B. S., Quitte G., Regelous M., Scalo J. M., Schaller G., Sugiura N., Tachibana S.   +15 more
core   +1 more source

Emulsion sheet doublets as interface trackers for the OPERA experiment [PDF]

, 2008
New methods for efficient and unambiguous interconnection between electronic counters and target units based on nuclear photographic emulsion films have been developed.
, , A Anokhina, A Ariga, A Ariga, A Badertscher, A Bertolin, A Cazes, A Chukanov, A Di Giovanni, A Dominjon, A E Ball, A Ereditato, A Garfagnini, A Ljubicic, A Longhin, A Marotta, A Meregaglia, A Paoloni, A Pastore, A Rubbia, A Russo, A Schembri, A Zghiche, B D Park, B Janutta, B Wonsak, C Bozza, C Di Troia, C Goellnitz, C Gustavino, C Hagner, C Jollet, C Lazzaro, C Pistillo, C S Yoon, C Sirignano, D Autiero, D Bick, D Di Ferdinando, D Duchesneau, D Frekers, D Golubkov, D Ossetski, D Ryzhikov, E Carrara, E Pennacchio, F Bay, F Bersani Greggio, F Dal Corso, F Di Capua, F Grianti, F Juget, F Meisel, F Pupilli, F Terranova, G Acquistapace, G Brunetti, G D'Amato, G De Lellis, G Felici, G Giacomelli, G Grella, G Gusev, G Lutter, G Mandrioli, G Rosa, G Sazhina, G Sirri, G Wilquet, H Matsuoka, H Pessard, H Shibuya, I G Park, I Kreslo, I Laktineh, I Rostovtseva, I Tezuka, J Ebert, J Favier, J Goldberg, J Janicsko Csathy, J Knuesel, J L Vuilleumier, J Lenkeit, J Marteau, J S Song, J Yoshida, K Hoshino, K Jakovcic, K Kodama, K Manai, K Morishima, K Niwa, K Pretzl, L Arrabito, L Arrabito, L Chaussard, L Consiglio, L Patrizii, L S Esposito, L Scotto Lavina, L Stanco, L Votano, M Besnier, M Chernyavsky, M Cozzi, M De Serio, M Dracos, M Giorgini, M Guler, M Hierholzer, M Ieva, M Kazuyama, M Komatsu, M Messina, M Nakamura, M Pozzato, M Sioli, M Spinetti, M Stipcevic, M T Muciaccia, M Tenti, M Vladimirov, N Chon-Sen, N D'Ambrosio, N Di Marco, N Mauri, N Naganawa, N Polukhina, N Starkov, N Ushida, O Egorov, O Ryazhskaya, O Sato, P Migliozzi, P Monacelli, P Publichenko, P Strolin, P Tolun, P Vilain, R Acquafredda, R Bailey, R Brugnera, R Enikeev, R Fini, R Zimmermann, S Aoki, S Buontempo, S Dmitrievski, S Dusini, S H Kim, S Hiramatsu, S Mikado, S Miyamoto, S Ogawa, S Simone, S Takahashi, S Tufanli, S Zemskova, T Brugiere, T Ferber, T Fukuda, T Hara, T Kawai, T Matsuo, T Naka, T Nakamura, T Nakano, T Nakano, T Roganova, T Strauss, The OPERA collaboration, The OPERA collaboration, U Kose, U Moser, V A Galkin, V Chiarella, V Cuha, V I Galkin, V Nikitina, V Osedlo, V Pilipenko, V Saveliev, V Sugonyaev, V Tioukov, V Tsarev, Y Déclais, Y Gornushkin, Y Nonoyama, Y Sato, Y Taira, Y Zaitsev   +192 more
core   +4 more sources

Open‐DS: An Open‐Set Modulation Recognition Method for Low Probability of Interception Radar Emitters Based on Dictionary Similarity

IET Radar, Sonar &Navigation, Volume 19, Issue 1, January/December 2025.
(1) To address the radar emitter OMR problem in open‐space environments, a stable and easily portable LPI radar emitter OMR method based on dictionary similarity, Open‐DS, is proposed. (2) Considering that the relationships between features are often nonlinear, a random Fourier transform is applied to the features. (3) ICD and ICS modules are designed,
Gangyin Sun, Shiwen Chen, Chaopeng Wu, Li Zhang, Haikun Fang   +4 more
wiley   +1 more source

Power and Waveform Resource Allocation Method of LPI Netted Radar for Target Search and Tracking

IET Radar, Sonar &Navigation, Volume 19, Issue 1, January/December 2025.
A new scenario is considered for the low probability of intercept (LPI) netted radar in simultaneous target search and tracking, and a joint power and waveform resource allocation algorithm is proposed through the optimization of the multi‐dimensional resources.
Longhao Xie, Wenxing Ren, Ziyang Cheng, Ming Li, Huiyong Li   +4 more
wiley   +1 more source

Intra-pulse Modulation Recognition of LPI Radar Signals Based on Improved MobileNet [PDF]

Radioengineering
Addressing the challenge of feature extraction for Low Probability of Intercept (LPI) radar signals under low signal-to-noise ratio conditions, this study introduces a new method for intra-pulse modulation recognition of LPI radar signals based on an ...
J. Wu, X. Wang, Y. Zhou, B. Chen, W. Li, L. Zhang   +5 more
doaj  

Low Probability of Intercept-Based Optimal OFDM Waveform Design Strategy for an Integrated Radar and Communications System

IEEE Access, 2018
The integration of radar and communications systems can provide great advantages, such as enhanced efficiency, structure simplification, less occupied hardware resources, and interference mitigation, compared with traditional individual radar and ...
Chenguang Shi, Fei Wang, Sana Salous, Jianjiang Zhou   +3 more
doaj   +1 more source

Long‐Tailed Distributed Radar Emitter Signal Automatic Modulation Recognition Based on Decoupled Training

IET Radar, Sonar &Navigation, Volume 19, Issue 1, January/December 2025.
The research on radar emitter recognition under the condition of long tail distribution is proposed for the first time. An automatic modulation recognition method adapted to long‐tail distribution is proposed, which includes feature extraction under unbalanced dataset based on decoupling ResNeXt network design and classifier learning under balanced ...
Gangyin Sun, Shiwen Chen, Li Zhang, Chaopeng Wu, Haikun Fang   +4 more
wiley   +1 more source

Achieving Accurate Modulated Signal Recognition: A Hybrid Neural Network Approach With Data Augmentation

IET Radar, Sonar &Navigation, Volume 19, Issue 1, January/December 2025.
A hybrid neural architecture and incorporate a magnitude rescaling method for data augmentation for automatic modulation classification. The hybrid neural network includes a bidirectional long short‐term memory, a newly designed dynamic feature extraction module, and a transformer module.
Qi Zheng, Guangxiao Song, Kaiyin Yu, Fang Zhou, Dongping Zhang, Daying Quan   +5 more
wiley   +1 more source

Power minimization based robust OFDM radar waveform design for radar and communication systems in coexistence. [PDF]

, 2015
This paper considers the problem of power minimization based robust orthogonal frequency division multiplexing (OFDM) radar waveform design, in which the radar coexists with a communication system in the same frequency band.
Antonio Muro (134062), Belén Vicente (615664), Cristina Carranza-Rodríguez (778299), Javier Gandasegui (778298), José Luis Pérez-Arellano (403078), Julio López-Abán (134057), Pedro Fernández-Soto (403075)   +6 more
core   +4 more sources