Results 21 to 30 of about 593,784 (199)

OLIA: An open-source digital lock-in amplifier

open access: yesFrontiers in Sensors, 2023
The Open Lock-In Amplifier (OLIA) is a microcontroller-based digital lock-in amplifier built from a small number of inexpensive and easily sourced electronic components.
Andrew J. Harvie   +2 more
doaj   +1 more source

Design and Implementation of Intelligent Entrance Guard Lock Based on NB-IoT

open access: yesNantong Daxue xuebao. Ziran kexue ban, 2020
The key of conventional mechanical lock is easy to be lost and duplicated; the password entrance guard lock shares similar problems, like the high possibility of leaking and forgetting the password; the entrance guard lock based on Wi-Fi is limited by ...
ZHANG Tianqi;WANG Jin;LI Yuehua
doaj   +1 more source

On latches in biological systems: a comparative morphological and functional study of the retinaculum and the dens lock in Collembola

open access: yesFrontiers in Zoology, 2023
Background Springtails have the ability to jump using morphological structures consisting of a catapult, the furca, and a latching system constructed with interaction of the retinaculum and the dens lock.
Birk Rillich, Fábio G. L. Oliveira
doaj   +1 more source

Design, Detection and Management of Mechanical Security Code Manhole Cover

open access: yesMATEC Web of Conferences, 2018
In this paper, the researches and the application of manhole over as well as the existing problems have been described. The mechanical security code manhole cover with the built-in locking mechanism has been designed.
Su Zhonghua   +4 more
doaj   +1 more source

Sterically stabilized lock and key colloids: A self-consistent field theory study

open access: yes, 2011
A self-consistent field theory study of lock and key type interactions between sterically stabilized colloids in polymer solution is performed. Both the key particle and the lock cavity are assumed to have cylindrical shape, and their surfaces are ...
Fleer G. J., S. A. Egorov
core   +1 more source

Non-destructive lock-picking of a historical treasure chest by means of X-ray computed tomography.

open access: yesPLoS ONE, 2020
An innovative approach to a non-destructive lock mechanism examination by means of X-ray computed tomography (CT) was involved in a careful opening of a locked 19th century chest missing the key, as an interdisciplinary cooperation with the restorers. In
Eva Zikmundová   +3 more
doaj   +1 more source

Multi-Photon Quantum Key Distribution Based on Double-Lock Encryption

open access: yes, 2015
This paper presents a multi-stage, multi-photon quantum key distribution protocol based on the double-lock cryptography. It exploits the asymmetry in the detection strategies between the legitimate users and the eavesdropper. The security analysis of the
Gottesman   +6 more
core   +1 more source

Heterogeneous and rate-dependent streptavidin-biotin unbinding revealed by high-speed force spectroscopy and atomistic simulations [PDF]

open access: yes, 2019
Receptor-ligand interactions are essential for biological function and their binding strength is commonly explained in terms of static lock-and-key models based on molecular complementarity.
Gonzalez, Laura   +4 more
core   +4 more sources

Smart Molecular Recognition: From Key-to-Lock Principle to Memory-Based Selectivity

open access: yesFrontiers in Chemistry, 2020
The formation and decomposition of inclusion compounds with a solid-solid phase transition may be very selective to the guest molecular structure. This selectivity may function in essentially different ways than defined by the classical concept of ...
Askar K. Gatiatulin   +2 more
doaj   +1 more source

Entropic torque

open access: yes, 2002
Quantitative predictions are presented of a depletion-induced torque and force acting on a single colloidal hard rod immersed in a solvent of hard spheres close to a planar hard wall. This torque and force, which are entirely of entropic origin, may play
A. Vrij   +16 more
core   +2 more sources

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