Results 51 to 60 of about 3,511 (220)
Continuous ultrasonic thickness measurement technology
ITM Web of Conferences, 2017 The article describes the technologies and means of ultrasonic thickness measurement for pipeline base metal and welded joints using phased array antennas with linear scanning by TOFD and DAF methods.
Pronin Vitaliy +3 more
doaj +1 more source
Ultrasonic flaw sizing—An overview [PDF]
, 2012 The time-of-flight diffraction (TOFD) technique is one of the most common sizing methods in practical use by industry today. This method was developed over 40 years ago and is based on the technology and state of knowledge present at that time.
Engle, Brady J. +3 more
core +2 more sources
Strain, Volume 61, Issue 2, April 2025.ABSTRACT The present paper investigates the low‐velocity impact behaviour and the compression‐after‐impact (CAI) behaviour of carbon‐fibre reinforced‐plastic (CFRP) composite panels after two impacts in different locations on a test coupon. The effect of changing the separation distance between the two impacts, as well as changing the impact energy, is
R. A. Brooks +7 more
wiley +1 more source
Improving CO2 Fixation with Epoxides by Replacing Zirconium by Hafnium in UiO66 MOFs
ChemCatChem, Volume 17, Issue 5, March 6, 2025.Substituting Zr⁴⁺ with Hf⁴⁺ in UiO66‐NH₂ functionalized with N,N'‐dicyclohexylcarbodiimide (DCC) and N,N'‐diisopropylcarbodiimide (DIC) significantly enhances CO₂ adsorption and catalytic activity. Hf‐based catalysts, UiO66(Hf)‐DCCBr and UiO66(Hf)‐DICBr, possess stronger Lewis acidity and oxophilicity leading to high TOFs and yields under 0.1 MPa CO₂ ...
Seyedeh Molood Masoom Nataj +3 more
wiley +1 more source
Inspeksi Cacat Retakan Pada Material Dengan Uji Tak Merusak Ultasonik Menggunakan Metoda Analisis Frekuensi Spektroskopi [PDF]
, 2012 Pada uji tak merusak ultrasonik biasanya suatu gelombang ultrasonik diradiasikan ke dalam material oleh sebuah transduser. Bila ada cacat, maka akan terjadi interaksi antara berkas gelombang ultrasonik dan cacat tersebut yang dapat berupa pamantulan atau
nehru, N. (nehru)
core
Optimisation of a two-wire thermal sensor for flow and sound measurements [PDF]
, 2001 The Microflown is an acoustic sensor measuring particle velocity instead of pressure, which is usually measured by conventional microphones. In this paper an analytical model is presented to describe the physical processes that govern the behaviour of ...
de Bree, H.E. +5 more
core +2 more sources
Detectability of Welding Imperfections in Non-Destructive PA and TOFD Ultrasonic Tests
Biuletyn Instytutu Spawalnictwa, 2022 The primary objective of the article was to compare the PA and TOFD ultrasonic technique-based detectability of internal imperfections in welded joints.
Borys Bednarek +2 more
semanticscholar +1 more source
ChemCatChem, Volume 17, Issue 5, March 6, 2025.Phosphine and phosphine oxide‐decorated polymer‐immobilized ionic liquid stabilized AuNPs are highly selective catalysts for the solvent‐dependent partial reduction of nitrobenzene to N‐phenylhydroxylamine in water and azoxybenzene in ethanol. Catalysts generated from phosphine oxide‐decorated support impregnated with either Au(I) or Au(III) are ...
Simon Doherty +11 more
wiley +1 more source
Применение динамических и контактно-резонансных твердомеров производства НПФ УЛЬТРАКОН для контроля металлопродукции [PDF]
, 2017 Конференція проходила за підтримки Кафедри приладів і систем неруйнівного контролю ПБФ КПІ ім.
Глабец, С. Н.
core
Uncertainty in the Representation of Orography in Weather and Climate Models and Implications for Parameterized Drag [PDF]
, 2019 The representation of orographic drag remains a major source of uncertainty for numerical weather prediction (NWP) and climate models. Its accuracy depends on contributions from both the model grid‐scale orography (GSO) and the subgrid‐scale orography ...
Andrew D. Elvidge +11 more
core +1 more source