Results 211 to 220 of about 143,515 (296)
A Century of Learning: The Story of ESA's Education Committee, 1918–2025
Abstract The Education Committee and its precursors have been highly influential within the Ecological Society of America. Here we document the Education Committee's history, from its origins in reviewing curricular materials through major contributions to ecological literacy, teaching innovation, diversity initiatives, and professional development ...
Kenneth M. Klemow +6 more
wiley +1 more source
The Degradation of Access‐Based Business Models: Customer Misbehavior and Shared Mobility
ABSTRACT Access‐based services are considered one of the strategies to embed sustainability in business models. Yet, because the evolution of these business models has been overlooked, we do not know whether their promise to create triple value is sustained.
Andres Camacho, Carmen Valor
wiley +1 more source
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Extremal graphs for odd wheels
Journal of Graph Theory, 2021For a graph H , the Turán number of H , denoted by ex (n,H) , is the maximum number of edges of an n ‐vertex H ‐free graph. Let g(n,H) denote the maximum number of edges not contained in any monochromatic copy of H in a 2‐edge‐coloring of Kn . A wheel Wm
Longtu Yuan
exaly +2 more sources
Wear, 2019
Sometimes, railway wheels cannot be re-turned and have to be discarded far before its time in service due to local defects and severe wear. Laser cladding which deposits a surface layer of a repair material may be an approach to repair wheels locally. In
Yimin Zhu +5 more
exaly +2 more sources
Sometimes, railway wheels cannot be re-turned and have to be discarded far before its time in service due to local defects and severe wear. Laser cladding which deposits a surface layer of a repair material may be an approach to repair wheels locally. In
Yimin Zhu +5 more
exaly +2 more sources
A Shape-Changing Wheeling and Jumping Robot Using Tensegrity Wheels and Bistable Mechanism
IEEE/ASME transactions on mechatronics, 2023Tensegrity structures made from rigid rods and elastic cables have unique characteristics, such as being lightweight, easy to fabricate, and high load-carrying to weight capacity.
Sydney B. Spiegel +2 more
semanticscholar +1 more source
Fundamental realization of longitudinal slip efficiency of tractor wheels in a tillage practice
, 2021Longitudinal slip efficiency of driving wheels of off road vehicles is function of not only slip of all driving wheels but also their gross traction force.
S. Shafaei, M. Loghavi, S. Kamgar
semanticscholar +1 more source
Greasing the Wheels of the Cancer Machine: The Role of Lipid Metabolism in Cancer.
Cell Metabolism, 2019Altered lipid metabolism is among the most prominent metabolic alterations in cancer. Enhanced synthesis or uptake of lipids contributes to rapid cancer cell growth and tumor formation.
M. Snaebjornsson +2 more
semanticscholar +1 more source
Cusps on Wheels on Wheels on Wheels
Mathematics Magazine, 1998where d1, d2 are real, and q, r are positive integers this makes the curve close up at t = 2-r. We ask: For which q, r, dl, d2, does the curve given by (1) have cusps and, when it does, how many are there? We begin by changing variables and turning the question into one about intersecting circles in the plane.
Peter Giblin, Matthew Trout
openaire +1 more source
STEP: A New Mobile Platform With 2-DOF Transformable Wheels for Service Robots
IEEE/ASME transactions on mechatronics, 2020This article presents a new mobile platform with two-degree-of-freedom (2-DOF) transformable wheels for service robots, which can overcome steps and stairs of various sizes encountered in indoor environments.
Youngsoo Kim +5 more
semanticscholar +1 more source

