Results 51 to 60 of about 3,387,563 (289)

Disc Tool Profiling for Air Compressor Screws with Complex Characteristic Curves

open access: yesJournal of Machine Engineering, 2021
One of the best practical methods to machine the air compressor screw pairs is milling or grinding by disc tools. The mathematics involved in disc tool profiling is quite complex and requires representing the machined surface by mathematical equations ...
Tuan-Linh Nguyen, Long Hoang
doaj   +1 more source

Reverse Mathematics of Complexity Lower Bounds

open access: yesIEEE Annual Symposium on Foundations of Computer Science
Reverse mathematics is a program in mathematical logic that seeks to determine which axioms are necessary to prove a given theorem. In this work, we systematically explore the reverse mathematics of complexity lower bounds.
Lijie Chen, Jiatu Li, Igor C. Oliveira
semanticscholar   +1 more source

THE FACTORS INFLUENCING THE MATHEMATICS EXAM SUCCESS RATE IN THE STUDY PROGRAMMES TAUGHT AT THE COLLEGE OF POLYTECHNICS JIHLAVA (2006–2015)

open access: yesJournal on Efficiency and Responsibility in Education and Science, 2016
This paper addresses the exam success rates in Mathematics 1 at the College of Polytechnics in Jihlava (CPJ). Primary data taken from the school information system cover the years 2006–2015.
PROKOP, Martin, STOLÍN, Radek
doaj   +1 more source

A NOTE ON THE REVERSE MATHEMATICS OF THE SORITES [PDF]

open access: yesThe Review of Symbolic Logic, 2018
AbstractSorites is an ancient piece of paradoxical reasoning pertaining to sets with the following properties: (Supervenience) elements of the set are mapped into some set of “attributes”; (Tolerance) if an element has a given attribute then so are the elements in some vicinity of this element; and (Connectedness) such vicinities can be arranged into ...
openaire   +2 more sources

Mathematics gender gaps in Kenya: Are resource differentials between boys and girls to blame?

open access: yesCogent Education, 2018
The Blinder-Oaxaca approach has been used to decompose the gender gap in mathematics test scores in private and public primary schools in Kenya. That is, the mathematics production functions are estimated separately for boys and girls, the difference ...
Alice Ng’ang’a   +2 more
doaj   +1 more source

Evaluation of effectiveness of engineering drawing course on improvement of engineering and basic science disciplines students' 3D spatial abilities

open access: yesآموزش مهندسی ایران, 2015
3D Spatial ability is an important and vital ability for engineering disciplines in the fields such as designing, modeling, reverse engineering, production and manufacturing and etc.
Mahdi Motaghipour
doaj   +1 more source

The reverse mathematics of Hindman’s Theorem for sums of exactly two elements [PDF]

open access: yesDe Computis, 2018
Hindman’s Theorem (HT) states that for every coloring of N with finitely many colors, there is an infinite set H ⊆ N such that all nonempty sums of distinct elements of H have the same color.
Barbara F. Csima   +5 more
semanticscholar   +1 more source

Reverse mathematics and initial intervals

open access: yesAnnals of Pure and Applied Logic, 2014
updated draft after referees' suggestions; simpler proof of Lemma 3.3; improved statement of Lemma 5.7 (former Lemma 5.6)
Emanuele Frittaion, Alberto Marcone
openaire   +2 more sources

Partial orders and immunity in reverse mathematics [PDF]

open access: yesConference on Computability in Europe, 2016
We identify computability-theoretic properties enabling us to separate various statements about partial orders in reverse mathematics. We obtain simpler proofs of existing separations, and deduce new compound ones.
Ludovic Patey
semanticscholar   +1 more source

Valosin‐containing protein counteracts ATP‐driven dissolution of FUS condensates through its ATPase activity in vitro

open access: yesFEBS Letters, EarlyView.
Biomolecular condensates formed by fused in sarcoma (FUS) are dissolved by high ATP concentrations yet persist in cells. Using a reconstituted system, we demonstrate that valosin‐containing protein (VCP), an AAA+ ATPase, counteracts ATP‐driven dissolution of FUS condensates through its D2 ATPase activity.
Hitomi Kimura   +2 more
wiley   +1 more source

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