Results 81 to 90 of about 20,619 (262)
Focus drive mechanism for the IUE scientific instrument [PDF]
, 1977 A compact, lightweight mechanism was developed for in-orbit adjustment of the position of the secondary mirror (focusing) of the International Ultraviolet Explored telescope. This device is a linear drive with small (.0004 in.) and highly repeatable step
Dennis, T. B., Jr., Devine, E. J.
core +1 more source
Basins of attraction in nonsmooth models of gear rattle [PDF]
, 2008 This paper is concerned with the computation of the basins of attraction of a simple one degree-of-freedom backlash oscillator using cell-to-cell mapping techniques. This analysis is motivated by the modeling of order vibration in geared systems.
Homer, ME +3 more
core +2 more sources
Fisheries Management and Ecology, EarlyView.ABSTRACT In fisheries management, socioeconomic data, specifically qualitative data analysis, is often underutilized. This study qualitatively analyzed a primary federal data collection effort in the Northeast United States, The Greater Atlantic Region Commercial Fishing Business Cost Survey.
Elizabeth D. Conley +4 more
wiley +1 more source
Environmental Drivers of Jumbo Squid During Fishery Collapse in the Gulf of California (2019–2024)
Fisheries Oceanography, EarlyView.ABSTRACT The jumbo squid (Dosidicus gigas) is a cephalopod endemic to the eastern Pacific with significant ecological and economic importance. Its exploitation in the Gulf of California (GC) peaked in the 1990s, with catches exceeding 100,000 tons, but collapsed in 2009 and virtually disappeared by 2015, largely due to environmental changes and ...
Mario Vásquez‐Ortiz +5 more
wiley +1 more source
Jixie chuandong, 2009 A dynamic model of a gear rotor with transverse crack,gear backlash and nonlinear oil-film force of journal bearing is built and dimensionless equations of the system are derived.The system’s nonlinear dynamics characteristic are studied using the ...
李同杰, 王娟, 杨金龙, 孙启国
doaj
Shock and Vibration, 2017 A spiral bevel gear system supported on thrust bearings considering the coupled bending-torsional nonlinear vibration is proposed and an eight degrees of freedom (8DOF) lumped parameter dynamic model of the spiral bevel gear system combined with time ...
Jinli Xu, Fancong Zeng, Xingyi Su
doaj +1 more source
Energy absorption device Patent [PDF]
, 1966 Energy absorption device in high precision gear train for protection against damage to components caused by stop ...
Fredrickson, C. A.
core +1 more source
Can Europe Sustain a New Rules‐Based Geopolitical Order?
JCMS: Journal of Common Market Studies, EarlyView.Abstract The European Union (EU) faces a unique opportunity to lead a new rules‐based international order in an era of American retreat and heightened global uncertainty. Yet its path to leadership is rife with obstacles. In this article, we draw on international relations literatures on international political economy and comparative politics ...
Kathleen R. McNamara, Federico Steinberg
wiley +1 more source
Periodontitis and Periodontal Conditions in Systemically Healthy Children and Adolescents
Journal of Clinical Periodontology, EarlyView.ABSTRACT Objective To answer the PICoS question ‘in systemically healthy children and adolescents (Population), what are the main features of periodontitis, necrotising periodontal diseases (NPD) and other periodontal conditions (periodontal abscesses, endo‐periodontal lesions, traumatic occlusal forces, prosthesis‐ and tooth‐related factors ...
Inbar Eshkol‐Yogev +5 more
wiley +1 more source
Study on the Nonlinear Vibration Characteristic of Bending-torsional Coupled Single-stage Gear
Jixie chuandong, 2019 Taking spur gear pair as the research object, a 6-DOF coupled bending-torsion nonlinear vibration model including time-varying meshing stiffness, comprehensive error, backlash and input torque is established. Based on the bifurcation diagram and Poincare
Rongju Liu +3 more
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