Search

Your search keyword '"Du, Andrew"' showing total 63 results
Start Over Author "Du, Andrew"
63 results on '"Du, Andrew"'

54. Erratum: Corrigendum: Holocene shifts in the assembly of plant and animal communities implicate human impacts

Author

Lyons, S. Kathleen, primary, Amatangelo, Kathryn L., additional, Behrensmeyer, Anna K., additional, Bercovici, Antoine, additional, Blois, Jessica L., additional, Davis, Matt, additional, DiMichele, William A., additional, Du, Andrew, additional, Eronen, Jussi T., additional, Faith, J. Tyler, additional, Graves, Gary R., additional, Jud, Nathan, additional, Labandeira, Conrad, additional, Looy, Cindy V., additional, McGill, Brian, additional, Miller, Joshua H., additional, Patterson, David, additional, Pineda-Munoz, Silvia, additional, Potts, Richard, additional, Riddle, Brett, additional, Terry, Rebecca, additional, Tóth, Anikó, additional, Ulrich, Werner, additional, Villaseñor, Amelia, additional, Wing, Scott, additional, Anderson, Heidi, additional, Anderson, John, additional, Waller, Donald, additional, and Gotelli, Nicholas J., additional

Published
2016
Full Text
View/download PDF

56. Holocene shifts in the assembly of plant and animal communities implicate human impacts

Author

Kathleen Lyons, S., primary, Amatangelo, Kathryn L., additional, Behrensmeyer, Anna K., additional, Bercovici, Antoine, additional, Blois, Jessica L., additional, Davis, Matt, additional, DiMichele, William A., additional, Du, Andrew, additional, Eronen, Jussi T., additional, Tyler Faith, J., additional, Graves, Gary R., additional, Jud, Nathan, additional, Labandeira, Conrad, additional, Looy, Cindy V., additional, McGill, Brian, additional, Miller, Joshua H., additional, Patterson, David, additional, Pineda-Munoz, Silvia, additional, Potts, Richard, additional, Riddle, Brett, additional, Terry, Rebecca, additional, Tóth, Anikó, additional, Ulrich, Werner, additional, Villaseñor, Amelia, additional, Wing, Scott, additional, Anderson, Heidi, additional, Anderson, John, additional, Waller, Donald, additional, and Gotelli, Nicholas J., additional

Published
2015
Full Text
View/download PDF

60. Physical adversarial attacks on an aerial imagery object detector

Author

Andrew Du, Bo Chen, Tat-Jun Chin, Yee Wei Law, Michele Sasdelli, Ramesh Rajasegaran, Dillon Campbell, Du, Andrew, Chen, Bo, Chin, Tat-Jun, Law, Yee Wei, Sasdelli, Michele, Rajasegaran, Ramesh, Campbell, Dillon, and 22nd IEEE/CVF Winter Conference on Applications of Computer Vision (WACV) Waikoloa 4-8 January 2022

Subjects
FOS: Computer and information sciences, Computer Vision and Pattern Recognition (cs.CV), Computer Science - Computer Vision and Pattern Recognition, ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, adversarial attack and defense methods, deep learning, adversarial learning
Abstract

Deep neural networks (DNNs) have become essential for processing the vast amounts of aerial imagery collected using earth-observing satellite platforms. However, DNNs are vulnerable towards adversarial examples, and it is expected that this weakness also plagues DNNs for aerial imagery. In this work, we demonstrate one of the first efforts on physical adversarial attacks on aerial imagery, whereby adversarial patches were optimised, fabricated and installed on or near target objects (cars) to significantly reduce the efficacy of an object detector applied on overhead images. Physical adversarial attacks on aerial images, particularly those captured from satellite platforms, are challenged by atmospheric factors (lighting, weather, seasons) and the distance between the observer and target. To investigate the effects of these challenges, we devised novel experiments and metrics to evaluate the efficacy of physical adversarial attacks against object detectors in aerial scenes. Our results indicate the palpable threat posed by physical adversarial attacks towards DNNs for processing satellite imagery(1). Refereed/Peer-reviewed

Published
2022

61. Cas12a/Cpf1 knock-in mice enable efficient multiplexed immune cell engineering.

Author

Dong MB, Tang K, Zhou X, Shen J, Chen K, Kim HR, Zhou J, Cao H, Vandenbulcke E, Zhang Y, Chow RD, Du A, Suzuki K, Fang SY, Majety M, Dai X, and Chen S

Abstract

Cas9 transgenic animals have drastically accelerated the discovery of novel immune modulators. But due to its inability to process its own CRISPR RNAs (crRNAs), simultaneous multiplexed gene perturbations using Cas9 remains limited, especially by pseudoviral vectors. Cas12a/Cpf1, however, can process concatenated crRNA arrays for this purpose. Here, we created conditional and constitutive LbCas12a knock-in transgenic mice. With these mice, we demonstrated efficient multiplexed gene editing and surface protein knockdown within individual primary immune cells. We showed genome editing across multiple types of primary immune cells including CD4 and CD8 T cells, B cells, and bone-marrow derived dendritic cells. These transgenic animals, along with the accompanying viral vectors, together provide a versatile toolkit for a broad range of ex vivo and in vivo gene editing applications, including fundamental immunological discovery and immune gene engineering.

Published
2023
Full Text
View/download PDF

62. Global long-term stability of individual dietary specialization in herbivorous mammals.

Author

DeSantis LRG, Pardi MI, Du A, Greshko MA, Yann LT, Hulbert RC Jr, and Louys J

Subjects
Animals, Biological Evolution, Carbon Isotopes analysis, Humans, Mammals, Diet, Herbivory
Abstract

Dietary variation within species has important ecological and evolutionary implications. While theoreticians have debated the consequences of trait variance (including dietary specialization), empirical studies have yet to examine intraspecific dietary variability across the globe and through time. Here, we use new and published serial sampled δ 13 C enamel values of herbivorous mammals from the Miocene to the present (318 individuals summarized, 4134 samples) to examine how dietary strategy (i.e. browser, mixed-feeder, grazer) affects individual isotopic variation. We find that almost all herbivores, regardless of dietary strategy, are composed of individual specialists. For example, Cormohipparion emsliei (Equidae) from the Pliocene of Florida (approx. 5 Ma) exhibits a δ 13 C enamel range of 13.4‰, but all individuals sampled have δ 13 C enamel ranges of less than or equal to 2‰ (mean = 1.1‰). Most notably, this pattern holds globally and through time, with almost all herbivorous mammal individuals exhibiting narrow δ 13 C enamel ranges (less than or equal to 3‰), demonstrating that individuals are specialized and less representative of their overall species' dietary breadth. Individual specialization probably reduces intraspecific competition, increases carrying capacities, and may have stabilizing effects on species and communities over time. Individual specialization among species with both narrow and broad dietary niches is common over space and time-a phenomenon not previously well recognized or documented empirically.

Published
2022
Full Text
View/download PDF

63. Evolution of the modern human brain.

Author

Beaudet A, Du A, and Wood B

Subjects
Animals, Humans, Biological Evolution, Brain anatomy & histology, Hominidae anatomy & histology
Abstract

When compared to the brains of our closest living relatives, chimpanzees and bonobos, the brains of modern humans are larger and differently shaped. This chapter reviews what we know about the evolutionary history of these differences. We can make an educated guess about the size and shape of the brains of the hypothetical common ancestor of modern humans and chimpanzees/bonobos, but between ca. 8 million years ago and the present day evidence about the size and shape of the brain comes from either natural endocasts, which are literally brain-shaped rocks, or from individuals for which enough of the brain case is preserved to provide estimates of endocranial volume and/or the relative proportions of the different regions of the cerebral hemispheres and the cerebellum. The tempo and mode of brain size increase in the hominin clade has been the subject of spirited debate, but we suggest that some of this controversy is the combination of an overreliance on frequentist statistical tests and researchers addressing these issues at different taxonomic scales. The existence and significance of shape changes are also controversial topics, made more so by the dearth of reliable evidence., (© 2019 Elsevier B.V. All rights reserved.)

Published
2019
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results