South Pointing Chariot: An Invitation to Differential Geometry [PDF]
arXiv, 2015 We introduce the south-pointing chariot, an intriguing mechanical device from ancient China. We use its ability to keep track of a global direction as it travels on an arbitrary path as a tool to explore the geometry of curved surfaces. This takes us as far as a famous result of Gauss on the impossibility of a faithful map of the globe, which started ...
arxiv
Echo: An Edge-Centric Code Offloading System with Quality of Service Guarantee [PDF]
arXiv, 2018 Code offloading is promising to accelerate mobile applications and save energy of mobile devices by shifting some computation to cloud. However, existing code offloading systems suffer from a long communication delay between mobile devices and cloud. To address this challenge, in this paper, we consider to deploy edge nodes in the proximity of mobile ...
arxiv
Mitigating Sybil Attacks on Differential Privacy based Federated Learning [PDF]
arXiv, 2020 In federated learning, machine learning and deep learning models are trained globally on distributed devices. The state-of-the-art privacy-preserving technique in the context of federated learning is user-level differential privacy. However, such a mechanism is vulnerable to some specific model poisoning attacks such as Sybil attacks.
arxiv
International Journal of Mining Science and Technology, 2023 Investigations on the dynamic mechanical properties and failure mechanisms of coal under in-situ stress is essential for the prevention of dynamic disasters in deep coal mines.
Zhanguo Ma +5 more
doaj
An Electro-Mechanical Device for Solving Non-Linear Differential Equations [PDF]
, 1949 Carl A. Ludeke
openalex +1 more source
Interface engineering of van der Waals heterostructures towards energy-efficient quantum devices operating at high temperatures [PDF]
Quantum devices, which rely on quantum mechanical effects for their operation, may offer advantages, such as reduced dimensions, increased speed, and energy efficiency, compared to conventional devices. However, quantum phenomena are typically observed only at cryogenic temperatures, which limits their practical applications.
arxiv +1 more source
Negative differential conductance and super-Poissonian shot noise in single-molecule magnet junctions [PDF]
arXiv, 2014 Molecular spintroinic device based on a single-molecule magnet is one of the ultimate goals of semiconductor nanofabrication technologies. It is thus necessary to understand the electron transport properties of a single-molecule magnet junction. Here we study the negative differential conductance and super-Poissonian shot noise properties of electron ...
arxiv
Trapping, focusing and sorting of microparticles through bubble streaming [PDF]
arXiv, 2010 Ultrasound-driven microbubbles rectify oscillatory motion into strong steady streaming flow [1, 2]. In this fluid dynamics video, we show size-dependent trapping, focusing and sorting of microparticles, utilizing the interaction between bubble streaming and the induced streaming around the mobile particles.
arxiv
Investigation on Releasing of a Stuck Drill String by Means of a Mechanical Jar
Oil & Gas Science and Technology, 2017 Purpose. In this article the most important part is dedicated to the research of elimination of accident that is caused by drill string sticking during the process.
Moisyshyn V., Levchuk K.
doaj +1 more source
Mayfly: Private Aggregate Insights from Ephemeral Streams of On-Device User Data [PDF]
arXivThis paper introduces Mayfly, a federated analytics approach enabling aggregate queries over ephemeral on-device data streams without central persistence of sensitive user data. Mayfly minimizes data via on-device windowing and contribution bounding through SQL-programmability, anonymizes user data via streaming differential privacy (DP), and mandates ...
arxiv