Results 41 to 50 of about 1,896,797 (391)

Work, Energy, and Efficiency of a Recurve Bow

open access: yesInternational Scholastic Journal of Science, 2023
The shooting of a recurve bow was varied in two ways, changing draw distance and string length, to determine the relationship between work done in drawing the bowstring and the resulting kinetic energy of the arrow.
Sedthasard Kasetcharoenkit   +1 more
doaj  

Comparison of headspace–SPME and SPME-Arrow–GC–MS methods for the determination of volatile compounds in Korean salt–fermented fish sauce

open access: yesApplied Biological Chemistry, 2019
A new solid phase microextraction (SPME)-Arrow method was evaluated for the analysis of volatile compounds in kanari-aekjeot, a Korean traditional salt–fermented sand lance sauce, and compared it to the standard headspace–SPME method. Factors observed to
Nho-Eul Song   +4 more
semanticscholar   +1 more source

On the Arrow of Time [PDF]

open access: yesTheoretical Physics, 2017
AMS LaTeX file, 22 pages; added content, submitted to Foundations of ...
openaire   +2 more sources

Arrow update synthesis [PDF]

open access: yesInformation and Computation, 2020
In this contribution we present arbitrary arrow update model logic (AAUML). This is a dynamic epistemic logic or update logic. In update logics, static/basic modalities are interpreted on a given relational model whereas dynamic/update modalities induce transformations (updates) of relational models.
Wiebe van der Hoek   +3 more
openaire   +6 more sources

On the arrow of time

open access: yesDiscrete & Continuous Dynamical Systems - S, 2014
We believe the following three ingredients are enough to explain the mystery of the arrow of time: (1). equations of dynamics of gas molecules, (2). chaotic instabilities of the equations of dynamics, (3). unavoidable perturbations to the gas molecules. The level of physical rigor or mathematical rigor that can be reached for such a theory is unclear.
Hong Yang, Y. Charles Li
openaire   +3 more sources

ЗАСТОСУВАННЯ АВТОМАТИЧНИХ СТРІЛОК ТРОЛЕЙБУСУ ЯК ДЕТЕКТОРІВ В СИСТЕМАХ СВІТЛОФОРНОГО АВТОРЕГУЛЮВАННЯ

open access: yesElektrotehnìka ta Elektroenergetika, 2014
Для удосконалення світлофорного регулювання пропонується пристрій з пасивним датчиком, що передає сигнал про приближення до перехрестя тролейбусу та напрям його подальшого руху на дорожній ...
V. E. Trushevsky
doaj   +1 more source

Modeling Time's Arrow

open access: yes, 2012
Quantum gravity, the initial low entropy state of the Universe, and the problem of time are interlocking puzzles. In this article, we address the origin of the arrow of time from a cosmological perspective motivated by a novel approach to quantum ...
Ashtekar   +21 more
core   +2 more sources

The Thermodynamical Arrow and the Historical Arrow; Are They Equivalent? [PDF]

open access: yesEntropy, 2017
In this paper, the relationship between the thermodynamic and historical arrows of time is studied. In the context of a simple combinatorial model, their definitions are made more precise and in particular strong versions (which are not compatible with time symmetric microscopic laws) and weak versions (which can be compatible with time symmetric ...
openaire   +2 more sources

Pathophysiological, Neuropsychological, and Psychosocial Influences on Neurological and Neuropsychiatric Symptoms of Post-Acute COVID-19 Syndrome: Impacts on Recovery and Symptom Persistence

open access: yesBiomedicines
Although the impact of post-acute COVID-19 syndrome (PACS) on patients and public health is undeniably significant, its etiology remains largely unclear. Much research has been conducted on the pathophysiology, shedding light on various aspects; however,
Alex Malioukis   +3 more
doaj   +1 more source

A method to validate viral copy-number assay involving a hybrid amplicon and duplex droplet digital PCR

open access: yesMolecular Therapy: Methods & Clinical Development
Viral copy-number (VCN) assay is a powerful, effective method to quantify toxicity, cellular kinetics, and durability of virus-modified cell therapy products. The qualification and validation of assay requires reference control.
Raymond Wu   +3 more
doaj   +1 more source

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