Results 71 to 80 of about 487,525 (312)

The visual core of a hyperbolic 3-manifold [PDF]

arXiv, 1999
We introduce the notion of the visual core of a hyperbolic 3-manifold N and explore its basic properties. The visual core can be thought of as a harmonic analysis analogue of the convex core. We investigate circumstances in which the visual core of a cover N' of N embeds under the covering map from N' to N.
arxiv  

Probing neural networks with t-SNE, class-specific projections and a guided tour [PDF]

arXiv, 2021
We use graphical methods to probe neural nets that classify images. Plots of t-SNE outputs at successive layers in a network reveal increasingly organized arrangement of the data points. They can also reveal how a network can diminish or even forget about within-class structure as the data proceeds through layers.
arxiv  

Comparative Wear and Friction Analysis of Sliding Surface Materials for Hydrostatic Bearing under Oil Supply Failure Conditions

Advanced Engineering Materials, EarlyView.
Hydrostatic bearings excel in high‐precision applications, but their performance hinges on a continuous external supply. This study evaluates various material combinations for sliding surfaces to mitigate damage during supply failures or misalignment and to discover the most effective materials identified for enhancing the reliability and efficiency of
Michal Michalec, Lukáš Daněk, Jan Foltýn, Petr Svoboda, Carsten Gachot, Martin Hartl, Ivan Křupka   +6 more
wiley   +1 more source

Dimensionless Investigations on Energy Conversion and Analysis of Interlayer Time in Laser‐Based Powder Bed Fusion of Polymers for Polyamide 12 with Nanoadditives and Polypropylene

Advanced Engineering Materials, EarlyView.
This study explores the energy conversion in powder bed fusion of polymers using laser beam for polyamide 12 and polypropylene powders. It combines material and process data, using dimensionless parameters and numerical models, to enable the prediction of suitable printing parameters.
Christian Schlör, Moritz Grünewald, Kevin Popp, Ihsan Murat Kusoglu, Stephan Barcikowski, Stan Gann, Thomas Schuffenhauer, Martin Bastian, Claas Bierwisch, Johannes Rudloff   +9 more
wiley   +1 more source

Visual Analogue Scale: Evaluation of the Instrument for the Assess­ment of Pruritus

Acta Dermato Venereologica, 2012
The aim of this study was to evaluate the visual analogue scale (VAS) as a method of pruritus assessment. A total of 310 subjects with pruritic dermatoses (148 Caucasian subjects and 162 Asian subjects) were recruited. The patients assessed pruritus intensity using the horizontal and vertical VAS, numeric rating scale (NRS) and verbal rating scale (VRS)
Kenji Takamori, Jacek C Szepietowski, Jacek C Szepietowski, Monika Heisig, Masutaka Furue, Ngoc Quan Phan, Christine Blome, Satoshi Takeuchi, Kenichi Taneda, Sonja Ständer, Matthias Augustin, Adam Reich   +11 more
openaire   +4 more sources

Powder Metallurgy and Additive Manufacturing of High‐Nitrogen Alloyed FeCr(Si)N Stainless Steel

Advanced Engineering Materials, EarlyView.
The alloying element Nitrogen enhances stainless steel strength, corrosion resistance, and stabilizes austenite. This study develops austenitic FeCr(Si)N steel production via powder metallurgy. Fe20Cr and Si3N4 are hot isostatically pressed, creating an austenitic microstructure.
Louis Becker, Felix Radtke, Jonathan Lentz, Santiago Benito, Christoph Broeckmann, Sebastian Weber   +5 more
wiley   +1 more source

Nanoparticle‐Coated X2CrNiMo17‐12‐2 Powder for Additive Manufacturing—Part II: Processability by Powder Bed Fusion of Metals Using a Laser Beam

Advanced Engineering Materials, EarlyView.
In this manuscript, the processability of X2CrNiMo17‐12‐2 powder coated with silicon carbide, silicon, and silicon nitride nanoparticles is investigated. The amount of nanoparticles varies from 0.25 to 1 vol%. By coating the powder feedstock material with nanoparticles, an enlargement of the process window and an increase in the build rate are achieved.
Nick Hantke, Tim R. Brocksieper, Arne Lüddecke, Tobias Grimm, Arno Kwade, Jan T. Sehrt   +5 more
wiley   +1 more source

COMPARISON OF DEXXMEDETOMIDINE AND MIDAZOLAM FOR SEDATION AND ANALGESIA DURING SEPTOPLASTY UNDER MONITORED ANESTHESIA CARE

Pakistan Armed Forces Medical Journal, 2020
Objective: To compare dexmedetomidine and midazolam for effective sedation and pain relief during monitored anesthesia care for septoplasty using ramsay sedation scale and visual analogue scale. Study Design: Prospective observational study.
Faisal Wahid, Aftab Hussain, Hina Iftikhar, Faiz Ur Rehman, Ahmed Mushtaq, Muhammad Javad Yousaf   +5 more
doaj  

Enhancing Corrosion Resistance and Mechanical Strength of 3D‐Printed Iron Polylactic Acid for Marine Applications via Laser Surface Texturing

Advanced Engineering Materials, EarlyView.
Laser surface texturing significantly improves the corrosion resistance and mechanical strength of 3D‐printed iron polylactic acid (Ir‐PLA) for marine applications. Optimal laser parameters reduce corrosion by 80% and enhance tensile strength by 25% and ductility by 15%.
Mohammad Rezayat, Mojtaba Karamimoghadam, Mohammadreza Lalegani Dezaki, Ali Zolfagharian, Giuseppe Casalino, Antonio Mateo, Mahdi Bodaghi   +6 more
wiley   +1 more source

Parturient perineal distensibility tolerance assessed by EPI-NO: an observational study

Einstein (São Paulo)
Objective : To determine how parturient women tolerate the use of a perineal distensibility assessment technique using the EPI-NO device. Methods : An observational study with a total of 227 full-term parturient women was performed.
Mary Uchiyama Nakamura, Nelson Sass, Julio Elito Júnior, Carla Dellabarba Petricelli, Sandra Maria Alexandre, Edward Araujo Júnior, Miriam Raquel Diniz Zanetti   +6 more
doaj   +1 more source