August 15, 2024 – Kavli Institute Pre-Print Publications

Valleytronics and negative differential resistance in cubic boron nitride: a first-principles study

Posted by klaurent August 15, 2024Caltech

Kavli Affiliate: Austin Minnich | Summary:Cubic boron nitride (c-BN) is an ultrawide-bandgap semiconductor of significant interest for high-frequency and high-power electronics applications owing to its high saturation drift velocity and high electric breakdown field. Beyond transistors, devices exploiting the valley degree of freedom or negative differential resistance are of keen interest. While diamond has been […]

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Dynamics of the unitary Bose gas near a narrow Feshbach resonance: universal coherent atom-molecule oscillations

Posted by dbos August 15, 2024August 27, 2024Peking

Kavli Affiliate: Ke Wang | First 5 Authors: Ke Wang, Zhendong Zhang, Shu Nagata, Zhiqiang Wang, K. Levin | Summary: Quench experiments on a unitary Bose gas around a broad Feshbach resonance have led to the discovery of universal dynamics. This universality is manifested in the measured atomic momentum distributions where, asymptotically, a quasi-equilibrated metastable […]

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FancyVideo: Towards Dynamic and Consistent Video Generation via Cross-frame Textual Guidance

Posted by klaurent August 15, 2024Peking

Kavli Affiliate: Jing Wang | First 5 Authors: Jiasong Feng, Jiasong Feng, , , | Summary: Synthesizing motion-rich and temporally consistent videos remains a challenge in artificial intelligence, especially when dealing with extended durations. Existing text-to-video (T2V) models commonly employ spatial cross-attention for text control, equivalently guiding different frame generations without frame-specific textual guidance. Thus, […]

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FancyVideo: Towards Dynamic and Consistent Video Generation via Cross-frame Textual Guidance

Posted by dbos August 15, 2024August 27, 2024Peking

Kavli Affiliate: Jing Wang | First 5 Authors: Jiasong Feng, Ao Ma, Jing Wang, Bo Cheng, Xiaodan Liang | Summary: Synthesizing motion-rich and temporally consistent videos remains a challenge in artificial intelligence, especially when dealing with extended durations. Existing text-to-video (T2V) models commonly employ spatial cross-attention for text control, equivalently guiding different frame generations without […]

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The free boundary for the singular obstacle problem with logarithmic forcing term

Posted by dbos August 15, 2024August 27, 2024UCAS

Kavli Affiliate: Yi Zhou | First 5 Authors: Lili Du, Yi Zhou, , , | Summary: In the previous work [Interfaces Free Bound., 19, 351-369, 2017], de Queiroz and Shahgholian investigated the regularity of the solution to the obstacle problem with singular logarithmic forcing term begin{equation*} -Delta u = log u , chi_{{u>0}} quad text{in} […]

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Unveiling the Cosmic Chemistry: Revisiting the Mass-Metallicity Relation with JWST/NIRSpec at 4 < z < 10

Posted by dbos August 15, 2024MIT

Kavli Affiliate: Eric Miller | First 5 Authors: Arnab Sarkar, Priyanka Chakraborty, Mark Vogelsberger, Michael McDonald, Paul Torrey | Summary: We present star formation rates (SFR), the mass-metallicity relation (MZR), and the SFR-dependent MZR across redshifts 4 to 10 using 81 star-forming galaxies observed by the JWST NIRSpec employing both low-resolution PRISM and medium-resolution gratings, […]

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Joint Optimization of Buffer Delay and HARQ for Video Communications

Posted by dbos August 15, 2024August 27, 2024UCAS

Kavli Affiliate: Cheng Peng | First 5 Authors: Baoping Cheng, Peng Lei, Xiaoyan Xie, Tao Fu, Yukun Zhang | Summary: To improve the quality of experience (QoE) in video communication over lossy networks, this paper presents a transmission method that jointly optimizes buffer delay and Hybrid Automatic Repeat request (HARQ), referred to as BD-HARQ. This […]

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