Results 81 to 90 of about 475,002 (275)

Testing the operation of protection devices against parallel arc breakdown and spark gaps in the event of a ground fault

open access: yesИзвестия высших учебных заведений: Проблемы энергетики
Testing the operation of protection devices against parallel arc breakdown and spark gaps in the event of a ground faultTHE PURPOSE. Develop a laboratory rig for testing parallel arc fault and spark gap protection devices for tripping in the event of a ...
A. N. Tyurin   +2 more
doaj   +1 more source

Relationship between Locations of Facial Injury and the Use of Bicycle Helmets: A Systematic Review

open access: yesArchives of Plastic Surgery, 2015
The aim of this study is to review the protective effect of a bicycle helmet on each facial location systematically. PubMed was searched for articles published before December 12, 2014.
Kun Hwang   +3 more
doaj   +1 more source

Portfolios and Assessment of Personal Protective Devices Course Learning [PDF]

open access: yesResearch and Development in Medical Education, 2015
Introduction: Portfolio assessment is one of the new and most accurate assessment methods. The objective of this study was to examine the introduction of portfolios in the assessment of students’ learning in a personal protective devices course. Methods:
Seyedeh Negar Assadi
doaj   +1 more source

Evaluation of the Potential of Laser Shock Peening Compared with Cold Expansion for Improving Fatigue Resistance of Riveted Lap Joints of Aerospace Grade 7175 Al Alloy

open access: yesAdvanced Engineering Materials, EarlyView.
This study investigates laser shock peening for enhancing fatigue performance of riveted aerospace aluminum joints. A comparative approach with cold expansion combines fatigue testing and synchrotron X‐ray methods. Integrating mechanical testing with residual stress and strain characterization provides insights into how different treatments affect the ...
Ogün Baris Tapar   +6 more
wiley   +1 more source

Barriers to the enforcement of motorcycle helmet laws: Insights from police and legislators [PDF]

open access: yesArchives of Trauma Research
Background: Many motorcyclists choose not to wear helmets, yet it remains unclear why they are not being fined by police or other authorities.Objectives: The aim of this study was to explore legislators’ perspectives on the factors contributing to the ...
Shahrokh Yousefzade‑Chabok   +6 more
doaj   +1 more source

Aerodynamic protection for space flight vehicles Patent [PDF]

open access: yes, 1967
Development and characteristics of protective coatings for ...
Parmley, R. T.
core   +1 more source

Adjustment of Coatings Morphology and Particle Distribution of Layered Silicates by Freeze‐Drying for Improved Gas Barriers

open access: yesAdvanced Engineering Materials, EarlyView.
Freeze‐drying of layered silicate is the key to get coatings with superior gas barrier. Freeze‐drying of layered silicates modified with dodecylamine (DDA) is a highly effective technique for the preparation of barrier pigments that significantly mitigate the permeation of oxygen, water vapor, and hydrogen through polymer films containing these ...
Joshua Lommes   +4 more
wiley   +1 more source

Feasibility study of silicon nitride protection of plastic encapsulated semiconductors [PDF]

open access: yes
The application of low temperature silicon nitride protective layers on wire bonded integrated circuits mounted on lead frame assemblies is reported. An evaluation of the mechanical and electrical compatibility of both plasma nitride and photochemical ...
Erickson, J. J.   +3 more
core   +1 more source

Trace Nickel Activated Biphasic Core‐CuOii/Shell‐CuOi Secondary Microspheres Enable Room Temperature Parts‐Per‐Trillion‐Level NO2 Detection

open access: yesAdvanced Engineering Materials, EarlyView.
An idea of designing novel sensors is proposed by creating appropriate Schottky barriers and vacancies between isomorphous Core‐CuOii/ Shell‐CuOi secondary microspheres and enhancing catalytic and spill‐over effects, and electronegativity via spontaneous biphasic separation, self‐assembly, and trace‐Ni‐doping.
Bala Ismail Adamu   +8 more
wiley   +1 more source

Personnel Protective Equipment: Forgotten Protocol, Invigorated by COVID-19

open access: yesPesquisa Brasileira em Odontopediatria e Clínica Integrada, 2021
Objective: To make the readers cognizant about the use of Personnel Protective Equipment (PPEs) and infection control practices which should always form a part of basic patient management and not arise with every emerging disease.
Namdeo Prabhu, Rakhi Issrani
doaj  

Home - About - Disclaimer - Privacy