ioc.ee的 10 大竞争对手

knzhou.github.io

Oscillating forces, torques, and mass shifts from dark matter average to zero, but can yield a nonzero second order effect enhanced at low frequency, analogous to the ponderomotive force or gravitational wave memory.

ipho.olimpicos.net

past ipho problems and solutions, from 1967 until 2024. a pdf collection of problems and solutions from the international physics olympiad

arxiv.org

A system of non-tradable credits that flow between individuals like karma, hence proposed under that name, is a mechanism for repeated resource allocation that comes with attractive efficiency and fairness properties, in theory. In this study, we test karma in an online experiment in which human subjects repeatedly compete for a resource with time-varying and stochastic individual preferences or urgency to acquire the resource. We confirm that karma has significant and sustained welfare benefits even in a population with no prior training. We identify mechanism usage in contexts with sporadic high urgency, more so than with frequent moderate urgency, and implemented as a simple (binary) karma bidding scheme as particularly effective for welfare improvements: relatively larger aggregate efficiency gains are realized that are (almost) Pareto superior. These findings provide guidance for further testing and for future implementation plans of such mechanisms in the real world.

artofproblemsolving.com

Art of Problem Solving brings together creative thinkers and problem solvers from diverse backgrounds. We are connected by our passion for helping students succeed.

aapt.org

american association of physics teachers - aapt.org

indico.ictp.it

An IMPA - ICTP Online School -  held in Spanish and Portuguese The AGRA series of summer schools (Santiago de Chile, 2012; Cusco, 2015; Córdoba, 2018) has as its goal to foster the development of number theory in Latin America: it provides a formative experience for young researchers, and it also brings together senior and mid-career mathematicians working in the field. The primary

rae.ru

официальный сайт российской академии естествознания

faculty.uci.edu

fps