Results 61 to 70 of about 179,884 (271)

Mechanistic Origin of Photodegradation and Impurity Effects in Donor–Acceptor Luminescent Radicals

Advanced Optical Materials, EarlyView.
Purification‐dependent impurities distort the apparent optical and analytical data of TTM‐based radicals without altering their intrinsic photophysical properties. Carbazole attachment elevates the activation barrier of the photodegradation pathway, offering design principles for achieving more robust luminescent radical materials.
Takuya Hosokai, Wataru Ota, Kenshiro Matsuda, Hikaru Ishii, Amane Niwa, Yasuo Nakayama, Keisuke Nakamura, Daiki Asakawa, Emiko Fujiwara, Tohru Sato, Ken Albrecht   +10 more
wiley   +1 more source

¿Váscones o Wascónes? Acerca del Ducado de Cantabria y la fundación de ciudades en el norte peninsular en época visigoda

E-Spania, 2013
The Chronicles of Juan de Biclaro and Isidore of Seville news Visigothic foundation of two cities in Vasconia: Victoriacum and Ologicus. Traditionally identified with a point near Vitoria, the first, and the villa of Olite in Navarra, the second, this ...
Rafael Barroso Cabrera, Jesús Carrobles Santos, Jorge Morín de Pablos   +2 more
doaj   +1 more source

An Isotopic Perturbation Lemma Along Periodic Orbits [PDF]

, 2012
A well-known lemma by John Franks asserts that one obtains any perturbation of the derivative of a diffeomorphism along a periodic orbit by a $C^1$-perturbation of the whole diffeomorphism on a small neighbourhood of the orbit.
Gourmelon, Nicolas
core   +1 more source

Entropy zero area preserving diffeomorphisms of $S^2$

, 2012
In this paper we formulate and prove a structure theorem for area preserving diffeomorphisms of genus zero surfaces with zero entropy. As an application we relate the existence of faithful actions of a finite index subgroup of the mapping class group of ...
Bowen, Casson, Farb, Fathi, Fisher, Franks, Franks, Hirsch, Ivanov, John Franks, Katok, Kirby, Korkmaz, Mather, Michael Handel   +14 more
core   +1 more source

Accelerating Luminescence in Nanostructures: Exploring the Physical Limits and Impact of Ultrafast Emission in Nanoscale Materials

Advanced Photonics Research, EarlyView.
This review highlights recent advances in accelerating luminescence in nanostructures through cooperative emission, resonator coupling, and nonlocal light–matter interactions. By unifying concepts such as excitonic superradiance, superfluorescence, and the plasmonic Purcell effect, it reveals physical limits of ultrafast emission and their potential ...
Masaaki Ashida, Koichi Okamoto, Takuya Matsuda, Hajime Ishihara   +3 more
wiley   +1 more source

Midbrain PAG Astrocytes Modulate Mouse Defensive and Panic‐Like Behaviors

Advanced Science, EarlyView.
Astrocytes in the midbrain periaqueductal gray (PAG) dynamically encode threat intensity and shape defensive action selection in mice. Real‐time Ca2+ imaging reveals robust astrocytic activation during predator odor and CO2 exposure. Aberrant astrocytic Ca2+ overactivation disrupts goal‐directed escape, biases behavior toward freezing, and induces ...
Ellane Barcelon, Kyungchul Noh, Minkyu Hwang, Yoon‐Jung Kim, Unjin Lee, Yeon Joo Ryu, Je‐Kyung Ryu, Sang Beom Jun, Se‐Young Choi, Woo‐Hyun Cho, Sung Joong Lee   +10 more
wiley   +1 more source

Identification of a change in climate state using regional flood data [PDF]

Hydrology and Earth System Sciences, 2002
Flood frequency analysis typically assumes that annual floods arise from a single distribution and are independent. However, there is significant evidence for the existence of persistent climate modes. Timescales associated with climate variability range
S. W. Franks, S. W. Franks
doaj  

The rationality of history and the history of rationality: Menachem Fisch on the analytic idealist predicament

Open Philosophy, 2020
Two essential Kantian insights are the significance for rationality of the capacity for criticism and the limits of cognition, discovered when criticism is pursued methodically, that are due to the perspectival character of the human standpoint.
Franks Paul
doaj   +1 more source

Nanoscale Mapping of the Subcellular Glycosylation Landscape

Advanced Science, EarlyView.
Using multiplexed super‐resolution imaging with fluorophore‐labeled lectins, this study reports intracellular glycosylation at the nanoscale across organelles and synaptic specializations. Extending glycan analysis beyond the cell surface, Glyco‐STORM reveals distinct glycosylation nanodomains in the ER, Golgi, lysosomes, and synaptic sites.
Helene Gregoria Schroeter, Steffen Sass, Mike Heilemann, Thomas Kuner, Maja Klevanski   +4 more
wiley   +1 more source

Helix Alignment, Chevrons, and Edge Dislocations in Twist‐Bend Ferroelectric Nematics

Advanced Science, EarlyView.
The recently discovered twist‐bend ferroelectric nematic (NTBF) is the new member of the multiferroic family, representing a fluid with an oblique helicoidal (heliconical) periodic structure of spontaneous electric polarization. The work presents a thorough exploration of the material properties of this phase, how the periodic modulation of ...
Bijaya Basnet, Priyanka Kumari, Sathyanarayana Paladugu, Damian Pociecha, Jakub Karcz, Przemysław Kula, Nataša Vaupotič, Ewa Górecka, Oleg D Lavrentovich   +8 more
wiley   +1 more source