Results 71 to 80 of about 15,495,130 (258)
Occurrence and evolution of cannibal behaviour in extant snakes
Biological Reviews, EarlyView.ABSTRACT Extant snakes (Serpentes) are a highly diverse group of squamate reptiles, which have independently evolved key morphological adaptations to consume a large variety of vertebrate and invertebrate prey. While these predator–prey interactions have been widely addressed by several studies, little is known regarding the occurrence of cannibal ...
Bruna B. Falcão +2 more
wiley +1 more source
Modeling and Control of a Front-Axle Bicycle Robot
, 2022 This paper develops feasible control strategies and associated system responses to bring an autonomous front-axle bicycle robot from specified initial conditions to final conditions such that a specific performance index is minimized. To solve the problem, the following approach is used: The feasible controls derived from the normal equations of ...
openaire +1 more source
Striking for a Just Transition? North American Auto Unions and the Electric Vehicle Transition
Industrial Relations: A Journal of Economy and Society, EarlyView.ABSTRACT Decarbonization heightens risks for workers, but union strategies shape how these risks are managed and whether new jobs offer quality employment. This paper compares U.S. and Canadian auto unions during the 2023 Detroit Three bargaining, focusing on strategic capacities and internal politics to explain their divergent responses to the EV ...
Mathieu Dupuis, Ian Greer, Dongwoo Park
wiley +1 more source
Bridge expansion joint in road transition curve: effects assessment on heavy vehicles [PDF]
, 2017 Properly-designed road surfaces provide a durable surface on which traffic can pass smoothly and safely. In fact, the main causes that determine the structural decay of the pavement and its parts are the traffic loads.
Bonin +10 more
core +2 more sources
Scheduling optimization of optical lens polishing
International Transactions in Operational Research, EarlyView.Abstract Optical systems have achieved notable progress in focusing and imaging technologies; however, manual grinding remains indispensable, resulting in elevated costs, extended timelines, and inefficiencies. These difficulties are compounded by operational constraints, uneven machine utilization, and risks of order delays and escalating expenses ...
Tzu‐Chin Lin, Bertrand M. T. Lin
wiley +1 more source
Fast Compact Laser Shutter Using a Direct Current Motor and 3D Printing [PDF]
, 2015 We present a mechanical laser shutter design that utilizes a DC electric motor to rotate a blade which blocks and unblocks a light beam. The blade and the main body of the shutter are modeled with computer aided design (CAD) and are produced by 3D ...
Braverman, Boris +3 more
core +2 more sources
Estimating National and Foreign Trade Elasticities Using Generalized Transport Costs
Journal of Regional Science, Volume 65, Issue 2, Page 471-496, March 2025.ABSTRACT We introduce the definition of two distinct trade elasticities corresponding to imports from regions located in the same country (national elasticities) and foreign regions located in other countries (foreign elasticities). We resort to a three‐tier nested CES utility structure to derive the corresponding demand gravity equations.
José L. Zofío +3 more
wiley +1 more source
Nonlinear optimal control for the five-axle and three-steering coupled-vehicle system
Autonomous Intelligent SystemsTransportation of heavy loads is often performed by multi-axle multi-steered heavy duty vehicles In this article a novel nonlinear optimal control method is applied to the kinematic model of the five-axle and three-steering coupled vehicle system. First,
G. Rigatos +6 more
doaj +1 more source
Research on axle load transfer of low-medium speed maglev tractor
机车电传动, 2022 In order to study the axle load transfer of low-medium speed maglev tractor, the theoretical calculation formula of axle load transfer of maglev tractor was derived, and the axle load transfer results of maglev tractor under quasi-static condition were ...
LUO Jianli
doaj
Journal of Phycology, EarlyView.Abstract Alkaline phosphatase (AP) plays an important role in phosphorus (P) cycling in aquatic ecosystems, particularly under nutrient limitation. In post‐mining lakes of Czechia, periphyton forms extensive mats despite chronic P deficiency, suggesting dissolved organic P (DOP) may serve as a key P source.
Eliška Konopáčová +5 more
wiley +1 more source