Results 71 to 80 of about 2,246,970 (302)
THE DESIGN OF A CATAPULT MACHINE
Journal of Industrial Design and Engineering Graphics, 2021 This article will present the elements of the external structure of the catapulting machine, together with the catapulting mechanism and the operating principle of the whole assembly.
Matei Toma
doaj
Вестник Самарского государственного технического университета. Серия: Психолого-педагогические науки, 2019 The paper analyzes the theoretical approaches to the definition and analysis of the content of education and the content of teaching in didactics. It is concluded that the process of changing the concept of the content of education and training is ...
Elena V. Buntova
doaj +1 more source
Darwin's Principle of Divergence [PDF]
, 2004 Darwin's famous book, is not an easy book for the reader. Especially, the central part of his doctrine addressing the problem of how a small difference between varieties of a single species may become larger and larger and become a large difference ...
Uchii, Soshichi
core
Structural and biochemical analysis of a B12 superbinder
FEBS Letters, EarlyView.BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices +3 more
wiley +1 more source
Journal of Magnetic Resonance, 2011 The circumstances surrounding the realisation that NMR signal reception could be quantified in a simple fundamental manner using Lorentz's Principle of Reciprocity are described. The poor signal-to-noise ratio of the first European superconducting magnet is identified as a major motivating factor, together with the author's need to understand phenomena
openaire +3 more sources
FEBS Letters, EarlyView.How do genomes gain new functional parts? In eukaryotes, which tend to evolve under weak selection, much of the genome is junk. Palazzo and Qiu borrow the logic of Markov chains to show how non‐functional DNA becomes functional through the appearance of intermediate states, which arise due to epistasis, buffering, and biochemical messiness, allowing ...
Alexander F. Palazzo, Yi Qiu
wiley +1 more source
The Principles of Interpretability
Notre Dame Journal of Formal Logic, 1999 A generalized Veltman semantics developed by de Jongh is used to investigate correspondences between several extensions of interpretability logic, IL. In this paper we present some new results on independences.
openaire +5 more sources
Prospecting the protein design landscape
FEBS Letters, EarlyView.This review outlines the current state of various protein design approaches. We discuss the current possibilities enabled by recently released tools, highlight future avenues to pursue in protein design, and underscore the crucial role of key databases and resources for successful protein design workflows.
Jakob R. Riccabona +4 more
wiley +1 more source
Islamic Foreign Policy Principles Derived from the Covenants of Prophet Muhammad [PDF]
Journal of Islamic Political StudiesCountries often establish principles to guide their foreign policies, often prioritizing their own interests over those of others. This paper will explore Islamic principles of foreign policy, drawing from the covenants of Prophet Muhammad. The Prophet’s
Abubakar Salati +4 more
doaj +1 more source
Artificial molecular machines and motors—Design and control of nanoscale motion
FEBS Letters, EarlyView.Molecules are constantly moving because of thermal fluctuations, but random motion alone cannot be exploited to perform directional tasks. Artificial molecular machines use chemical, electrical, or light energy to bias this motion. Molecular shuttles, rotary motors, and supramolecular pumps illustrate how nanoscale movement can be controlled and ...
Leonardo Andreoni, Alberto Credi
wiley +1 more source