Kavli Affiliate: Tom Melia | Summary:Extending the original work on the development of a magnetic avalanche detector using Mn$_12$-ac single-molecule magnet (SMM), we report the results on a significantly lower threshold magnetic avalanche detector using Fe$_8$ SMM. Fe$_8$ has an order of magnitude smaller relaxation time that is expected to produce at least 3 orders […]
Kavli Affiliate: Kenneth Miller | Authors: Shen Wang, Agostina Palmigiano, Kenneth D Miller and Stephen David Van Hooser | Summary: Cross-orientation suppression is a classic form of contextual normalization in visual cortex, yet the degree to which cortical circuits participate in the normalization computation is unclear. We visualized orientation maps of individual ferrets, and provided […]
Kavli Affiliate: David T. Limmer | Summary:The kinetic Wulff construction predicts symmetric nonequilibrium shapes when crystallographically equivalent facets share a fixed growth rate. However, nanocrystals grow through finite facets whose nucleation barriers and ligand coverages depend on facet size. Here we develop a size-dependent kinetic construction and show that as a consequence infinitesimal seed asymmetries […]
Kavli Affiliate: David Charbonneau | Summary:Complex periodic variables (CPVs) are young low-mass stars whose light curves show periodic dips indicative of transiting corotating material. The origin and composition of this material are unclear. Here we present new optical and near-infrared spectroscopy and photometry of four CPVs from Magellan, Keck, Hale, MuSCAT1, MuSCAT2, Tierras, KeplerCam, and […]
Kavli Affiliate: Mark Vogelsberger | Summary:Recent JWST observations have revealed a large population of compact red sources at $z gtrsim 4$, known as Little Red Dots (LRDs), many of which show signatures of accreting massive black holes (BHs). The physical nature of these sources and their connection to host galaxies are under debate. We propose […]
Kavli Affiliate: Kohei Inayoshi | Summary:We present the Skyfire program, a 21-hour Cycle 3 JWST/NIRSpec survey with the G395M medium-resolution grating covering five pointings in the Extended Groth Strip. The survey is designed to carry out a systematic census of faint, broad-line AGN candidates with a range of rest-optical colors identified at z > 3 […]
Kavli Affiliate: E. P. S. Shellard | Summary:Nambu-Goto cosmic string loops generically develop cusps, points where the string momentarily reaches the speed of light. These cusps produce strong gravitational wave bursts with a characteristic strain spectrum $tildeh(ω)propto (Gμ),ω^-4/3$, making them prime targets for gravitational wave searches, where $μ$ is the string mass per unit length. […]
Kavli Affiliate: Menno Witter | Authors: Sihui Cheng, Qirun Wang, Ye Feng, Cong Chen, Guge Suri, Yilan Liang, Yikai Yang, Kai Gao, Menno Witter, Huixia Yang, Jie Lin and Chenglin Miao | Summary: The hippocampus (HPC) and medial entorhinal cortex (MEC) are essential for learning, memory, and spatial cognition, and both exhibit dorsoventral (longitudinal) organization […]
Kavli Affiliate: Robert Cameron | Summary:Refusals are often treated as face-threatening acts in pragmatics because they can challenge the requester’s socially claimed self-image. Large language models (LLMs) are increasingly trained to refuse unsafe and inappropriate requests, and these refusals may harm users when models fail to manage this interactional cost properly. While existing work has […]