Results 61 to 70 of about 641,569 (258)

Multi-UAV Obstacle Avoidance and Formation Control in Unknown Environments

Drones
To address the issues of local minima, target unreachability, and significant formation disruption during obstacle avoidance in the conventional artificial potential field (APF), a control approach that integrates APF with optimal consensus control which
Yawen Li, Pengfei Zhang, Zhongliu Wang, Dian Rong, Muyang Niu, Cong Liu   +5 more
doaj   +1 more source

Deterring a Nuclear Iran: The Devil in the Details [PDF]

, 2010
Explores the technical requirements for a deterrence regime against Iran should it acquire a nuclear weapons capability. Considers red lines, treaty arrangements, force deployment and bases, military assistance to Iran's neighbors, and crisis ...
Kenneth M. Pollack
core  

Comparative cranial biomechanics reveal macroevolutionary trends in theropod dinosaurs, with emphasis on Tyrannosauroidea

The Anatomical Record, EarlyView.
Abstract Tyrannosaurus is viewed as a model organism in vertebrate paleontology, with numerous studies analyzing its feeding biomechanics. Nonetheless, the evolution of this feeding performance has been under‐addressed in Tyrannosauroidea, especially in basal tyrannosauroids. Here we used muscle‐force reconstruction and finite element analysis (FEA) to
Evan Johnson‐Ransom, Paul Gignac, Daniel E. Barta, Ryan N. Felice, Eric Snively   +4 more
wiley   +1 more source

Risk and Recreation: Differences Due to Gender, Age and Education [PDF]

, 1999
Dr. Burger explores the differences in risk perception due to gender, age and education with regard to recreation activities on former U.S.
Burger, Joanna
core   +2 more sources

Under the Shade of a Coolabah Tree: A Second Cache of Tulas From the Boulia District, Western Queensland

Archaeology in Oceania, EarlyView.
ABSTRACT This paper reports on the excavation of a cache of stone artefacts, buried on the bank of a waterhole or ‘billabong’ in central western Queensland. This is an extremely rare find, and yet it is the second such site to be reported within less than a 10 km radius.
Yinika L. Perston, Lynley A. Wallis, Heather Burke, Lorna Bogdanek, Trevina Rogers, Justine Kemp   +5 more
wiley   +1 more source

Information retrieval or document retrieval? Terminological confusions and unrealistic goals in information science, exemplified in relation to generative artificial intelligence

Journal of the Association for Information Science and Technology, EarlyView.
Abstract ChatGPT and related technologies have revived an old issue in information science (IS) concerning information retrieval (IR) versus document retrieval. Since 1950, the term IR has primarily been used as a misnomer for document retrieval. This problematic terminology reflects a desire to go beyond documents and provide, in response to user ...
Birger Hjørland
wiley   +1 more source

Study on Thermophysical Properties and Electrical Conductivity Characteristics of Combustion Products from Propellants with Ionization Seeds

Aerospace
Detailed knowledge regarding the thermophysical properties and electrical conductivity of the combustion products derived from solid propellants is essential for the optimized design and operation of solid-fuel rocket engines employing ...
Chunlin Chen, Lei Chang, Baoquan Mao, Qijin Zhao, Renbin Li, Xianghua Bai   +5 more
doaj   +1 more source

Shake & Bake: Dual-Use Chemicals, Contexts, and the Illegality of American White Phosphorus Attacks in Iraq [PDF]

, 2007
[Excerpt] “On November 29, 2005, in a Department of Defense press conference with Secretary of Defense Donald Rumsfeld and Gen. Peter Pace, Chairman of the Joint Chiefs of Staff, General Pace stated that white phosphorus “is a legitimate tool of the ...
Tessier, Joseph D.
core   +1 more source

To protect and preserve? Explaining the gap between structural and superficial racial equality regimes in North Atlantic Rim universities

British Educational Research Journal, EarlyView.
Abstract This article examines how UK and US universities manage racial equality regimes through governance structures that prioritise institutional reputation over substantive racial justice reform. Drawing on Bourdieu's field, habitus and capital theory, the study demonstrates how universities neutralise racial justice efforts through bureaucratic ...
David Roberts
wiley   +1 more source

Mechanical Behavior of Ultrafine Gradient Grain Structures Produced via Ambient and Cryogenic Surface Mechanical Attrition Treatment in Iron

Metals, 2015
Ambient and cryogenic surface mechanical attrition treatments (SMAT) are applied to bcc iron plate. Both processes result in significant surface grain refinement down to the ultrafine-grained regime; the cryogenic treatment results in a 45% greater grain
Heather A. Murdoch, Kristopher A. Darling, Anthony J. Roberts, Laszlo Kecskes   +3 more
doaj   +1 more source