Results 61 to 70 of about 5,690,335 (402)

The role of sexual preferences in intrasexual female competition

BMC Evolutionary Biology, 2012
Background While search costs have long been understood to affect the evolution of female preference, other costs associated with mating have been the focus of much less attention.
Frame Alicia M
doaj   +1 more source

End-to-End Learning of Action Detection from Frame Glimpses in Videos [PDF]

Computer Vision and Pattern Recognition, 2015
In this work we introduce a fully end-to-end approach for action detection in videos that learns to directly predict the temporal bounds of actions. Our intuition is that the process of detecting actions is naturally one of observation and refinement ...
Serena Yeung, Olga Russakovsky, Greg Mori, Li Fei-Fei   +3 more
semanticscholar   +1 more source

Frame Permutation Quantization [PDF]

, 2010
Frame permutation quantization (FPQ) is a new vector quantization technique using finite frames. In FPQ, a vector is encoded using a permutation source code to quantize its frame expansion.
Abdelkefi, Beferull-Lozano, Benedetto, Berger, Berger, Berger, Bodmann, Bodmann, Brajovic, Cover, Cvetković, Cvetković, Cvetković, Daubechies, David, Donoho, Eldar, Gersho, Goyal, Goyal, Goyal, Gray, Guo, György, Ha Q. Nguyen, Han, Holmes, Jelinek, Kovačević, Kovačević, Lav R. Varshney, Marco, Nguyen, Powell, Rangan, Sakrison, Slepian, Slepian, Strohmer, Strohmer, Sustik, Thao, Thao, Thao, Tropp, Viswanathan, Vivek K. Goyal   +46 more
core   +4 more sources

ITRF2014: A new release of the International Terrestrial Reference Frame modeling nonlinear station motions

, 2016
For the first time in the International Terrestrial Reference Frame (ITRF) history, the ITRF2014 is generated with an enhanced modeling of nonlinear station motions, including seasonal (annual and semiannual) signals of station positions and postseismic ...
Z. Altamimi, P. Rebischung, L. Métivier, X. Collilieux   +3 more
semanticscholar   +1 more source

Handheld multi-frame super-resolution [PDF]

ACM Transactions on Graphics, 2019
Compared to DSLR cameras, smartphone cameras have smaller sensors, which limits their spatial resolution; smaller apertures, which limits their light gathering ability; and smaller pixels, which reduces their signal-to-noise ratio.
Bartlomiej Wronski, I. Garcia-Dorado, M. Ernst, D. Kelly, Michael Krainin, Chia-Kai Liang, M. Levoy, P. Milanfar   +7 more
semanticscholar   +1 more source

Blurry Video Frame Interpolation [PDF]

Computer Vision and Pattern Recognition, 2020
Existing works reduce motion blur and up-convert frame rate through two separate ways, including frame deblurring and frame interpolation. However, few studies have approached the joint video enhancement problem, namely synthesizing high-frame-rate clear
Wang Shen, Wenbo Bao, Guangtao Zhai, Li Chen, Xiongkuo Min, Zhiyong Gao   +5 more
semanticscholar   +1 more source

Structural and mechanistic basis for the regulation of the chloroplast signal recognition particle by (p)ppGpp

FEBS Letters, EarlyView.
LHCPs are transported to the thylakoid membrane via the (cp)SRP pathway. This process involves a transit complex of (cp)SRP43, (cp)SRP54 and LHCP, which interacts with (cp)FtsY and Alb3 at the membrane. GTP hydrolysis by (cp)SRP54 and (cp)FtsY triggers complex dissociation.
Victor Zegarra, Paul Weiland, Pauline Anka Plitzko, Julia Thiery, Laura Czech, Felix Willmund, Patricia Bedrunka, Gert Bange   +7 more
wiley   +1 more source

Effect of fly ash-lime treatment on the acute toxicity of greywater towards Daphnia magna

Nova Biotechnologica et Chimica, 2019
Acute toxicity of raw and treated greywater towards Daphnia magna was assessed in this study. Treatment was performed with exposure of greywater to the fly-lime mixture After 48 h of exposure, 100 % mortality of D.
Nondlazi Sinoyolo, Ngqwala Nosiphiwe, Zuma Bongumusa M., Mensah Paul K., Tandlich Roman   +4 more
doaj   +1 more source

The solution supramolecular structure of α2 → 8 polysialic acid suggests a structural cause for its low immunogenicity

FEBS Letters, EarlyView.
α2 → 8 polysialic acid elicits poor immunogenicity. Small‐angle scattering shows a supramolecular structure with parallel‐chain binding, although in different forms at μm and mm calcium. The major histocompatibility complex requires molecular weights around 2000 Da to produce antibodies, and 2000 Da polysialic oligomers will bind in these structures ...
Kenneth A. Rubinson
wiley   +1 more source

∗-K-Operator Frame for Hom∗A(X)

European Journal of Mathematical Analysis, 2021
In this work, we introduce the concept of ∗-K-operator frames in Hilbert pro-C∗-modules, which is a generalization of K-operator frame. We present the analysis operator, the synthesis operator and the frame operator.
Mohamed Rossafi, Roumaissae El Jazzar, Ali Kacha   +2 more
doaj   +1 more source