The long-run decline in the share of agricultural and food products in international trade, 1951-2000: a gravity equation approach of its causes [PDF]
The objective of this study is to determine the causes of the loss of share of agricultural products and food in international trade. The article compares, using a gravity model, the impact of various factors upon bilateral trade in agricultural products,
Raúl Serrano, Vicent Pinilla
core
A Soft Robotic Fish With a Dielectric Elastomer Actuator Body and Negative Stiffness Spine
Advanced Robotics Research, EarlyView.This work introduces a bio‐mimetic soft robotic fish driven by fiber‐reinforced dielectric elastomer actuators integrated as its body. By prestretching this active skin against a flexible spine, a negative stiffness system is created, enabling large‐amplitude bending.
Markus Koenigsdorff +4 more
wiley +1 more source
Active Support Correction and Variable Triangular Layout Optimization for an Annular Thin Mirror in Optical Remote-Sensing Systems. [PDF]
Sensors (Basel)Peng L, Chen C.
europepmc +1 more source
Does Aid Cause Trade? Evidence from an Asymmetric Gravity Model [PDF]
Anderson and vanWincoop (2003) developed what has become the standard framework for framing and interpreting empirical work using the gravity model. Its main advantage is that it recognizes and tackles the issue of endogeneity of prices.
Simone Juhasz Silva, Douglas Nelson
core
Advanced Robotics Research, EarlyView.This work presents a robotic control method for human–robot collaborative assembly based on a biomechanics‐constrained digital human model. Reinforcement learning is used to generate physiologically plausible human motion trajectories, which are integrated into a virtual environment for robot control learning.
Bitao Yao +4 more
wiley +1 more source
Reciprocal trade agreements in gravity models: a meta-analysis [PDF]
Over the time a large number of reciprocal preferential trade agreements (RTAs) have been concluded among countries. Recently many studies have used gravity equations in order to estimate the effect of RTAs on trade flows between partners.
Cipollina, Maria, Salvatici, Luca
core
Efficient and Robust Standing Postures of Quadruped Robots
Advanced Robotics Research, EarlyView.A calibrated static framework estimates load, optimizes torques, and adapts posture so quadruped robots stand efficiently and robustly under external payloads, achieving up to 50% lower torque demand. Inspired by the natural posture adjustments of animals under external loading, this article presents an optimization‐based framework for minimizing joint
Mohamad Kanaan +5 more
wiley +1 more source
Horizon data: existence results and a near-horizon equation on general null hypersurfaces. [PDF]
Gen Relativ GravitManzano M, Mars M.
europepmc +1 more source
Estimating Gravity Equations: To Log or Not to Log? [PDF]
This study compares two alternative approaches to estimate parameters in gravity equations. We compare the traditional OLS approach applied to the log-linear form of the gravity model with the Poisson Quasi Maximum Likelihood (PQML) estimation procedure ...
Dieter Schumacher, Boriss Siliverstovs
core
3D‐Printing Aided Rapid Prototyping of Pretensioned Tensegrity Structures for Robotic Applications
Advanced Robotics Research, EarlyView.Printing, injection molding, and assembly (PMA) is a method for rapid prototyping mesoscale, topologically complex, and tensioned tensegrity structures. In combination with PMA method, two mold design strategies: modular mold and compact channel layout, enable efficiency and scalability for tensegrity fabrication.
Yi Sun +3 more
wiley +1 more source