Results 41 to 50 of about 4,968,550 (330)

Development of a Real-Time Geometric Quality Monitoring System for Extruded Filaments of 3D Concrete Printing Construction

IEEE Access
Extrusion-based 3D concrete printing (3DCP) is an additive manufacturing (AM) technology in the construction field and is gaining significant attention as an emerging construction method for the future.
Jihye Jhun, Dong-Hyun Lee, Atta Ur Rehman, Seungwoo Kang, Jung-Hoon Kim   +4 more
doaj   +1 more source

Exploring Pre-Service Teachers’ Conceptual Understanding and Confidence in Geometrical Optics: A Focus on Gender and Prior Course Achievement

Education Sciences, 2023
This study investigated pre-service science teachers’ conceptual understanding and confidence in geometrical optics with respect to gender and their previous achievement in geometrical optics course.
Derya Kaltakci-Gurel
doaj   +1 more source

Geometrical Analysis of 3D-Printed Polymer Spur Gears

Machines
In this paper, we are looking for the answer to the following question: what geometric deviations do polymer gears made by 3D printing have from the theoretical geometry?
Levente Czégé, Gábor Ruzicska
doaj   +1 more source

Sewing Thread Consumption for Different Lockstitches of Class 300 Using Geometrical and Multi-Linear Regression Models

AUTEX Research Journal, 2020
This paper aims to provide rapid and precise methods to allow industrials to predict the amount of sewing thread needed to sew a garment using different lockstitches of class 300 (301, 301/301, 304, 308, 309, 310, 311, 312, and 315).
Sarah Malek, Boubaker Jaouachi, Faouzi Khedher, Adolphe Dominique   +3 more
doaj   +1 more source

Geometric Accuracy of Large Machine Tools [PDF]

Acta Mechanica Slovaca, 2020
This article describes the issue of geometric accuracy of large machine tools. The operation and maintenance of large CNC machine tools is usually affected by a number of aspects related to large workpieces and spaces at the machine installation site. It is the size of the working space and the large dimensions of the production halls that very often ...
Michal Holub, Jiri Rosenfeld
openaire   +1 more source

Cell geometry and membrane protein crowding constrain Escherichia coli growth rate, overflow metabolism, respiration, and maintenance energy

FEBS Letters, EarlyView.
The physical dimensions and shape of bacterial cells define the surface area available to acquire nutrients and the volume available for synthesizing proteins and DNA. Here, we use computational systems biology to decode the importance of cell geometry as a major determinant of prokaryotic phenotype, including growth rate and metabolic efficiency. This
Ross P. Carlson, Tomáš Gedeon, Mauricio Garcia Benitez, Campbell Putnam, William R. Harcombe, Radhakrishnan Mahadevan, Ashley E. Beck   +6 more
wiley   +1 more source

A newly conceived cylinder measuring machine and methods that eliminate the spindle errors [PDF]

, 2012
Advanced manufacturing processes require improving dimensional metrology applications to reach a nanometric accuracy level. Such measurements may be carried out using conventional highly accurate roundness measuring machines.
David, Jean Marie, GIBARU, Olivier, DAVID, Jean-Marie, NOUIRA, H, VISSIERE, Alain, NOUIRA, Hichem, DAMAK, Mohamed   +6 more
core   +1 more source

Prediction of Geometrical Accuracy in Wire EDM by Analyzing Process Data

, 2022
2328In order to digitalize the wire EDM process, data-driven models for the evaluation of the process performance have to be developed. The challenge is the huge amount of data and the stochastically process behavior.
Tchoupe Sambou, Elio, Küpper, Ugur, Bergs, Thomas, Klink, Andreas, Tchoupe, Elio   +4 more
core   +1 more source

Effect of 3D Printing Orientation on the Accuracy and Surface Roughness of Polycarbonate Samples

Machines
The study evaluates models produced using fused deposition modeling (FDM) technology in five orientations, fabricated from polycarbonate (PC) material with a FORTUS 360mc printer.
Paweł Turek, Anna Bazan, Marcin Bulicz
doaj   +1 more source

Interpreting the effects of DNA polymerase variants at the structural level

Molecular Oncology, EarlyView.
Using MAVISp and molecular dynamics simulations, we analyzed over 60 000 missense variants in POLE and POLD1 from ClinVar, COSMIC, cBioPortal, and saturation mutagenesis. Identified mechanistic indicators, including stability, binding, and long‐range, enable structural interpretation, providing ACMG‐like evidence for possible reclassification of VUS ...
Matteo Arnaudi, Karolina Krzesińska, Ludovica Beltrame, Pablo Sánchez‐Izquierdo Besora, Matteo Tiberti, Mef Nilbert, Anna Rohlin, Elena Papaleo   +7 more
wiley   +1 more source