Results 121 to 130 of about 1,377,098 (387)

Historical Consciousness and Representations of the Political Identity of Young People in MERCOSUL [PDF]

open access: yes, 2014
El presente artículo tiene por objetivo analizar cómo estudiantes de quince años de edad y de países vecinos -Brasil, Argentina y Uruguay- poseen distintas nociones de carácter político-identitario.
Cerri, Luis Fernando   +2 more
core  

Intermetallic Compound Layer Morphology and Distribution in Friction‐Welded Steel–Aluminum Components

open access: yesAdvanced Engineering Materials, EarlyView.
In this study, how friction‐welding parameters (rotational speed, etc.) affect the morphology, distribution, and local thickness of the intermetallic compound layer (IMC‐layer) in friction‐welded steel‐aluminum hybrid components is investigated. In the results, it is shown that lower speeds (700 rpm) lead to a more uniform, thinner IMC‐layer (<0.5 μm),
Christoph Kahra   +6 more
wiley   +1 more source

THE FIRST PERMANENT MOLAR [PDF]

open access: yesJAMA: The Journal of the American Medical Association, 1922
In 1887, Dr. Andrieu of Paris read a paper before the section on dental and oral surgery of the Ninth International Medical Congress, advocating the extraction of the first permanent molars. His argument was based on the fact that 75 per cent, of these teeth decay.
openaire   +2 more sources

Molar Incisor Hypomineralization, Prevalence, and Etiology

open access: yesInternational Journal of Dentistry, 2014
Aim. To evaluate the prevalence and possible etiological factors associated with molar incisor hypomineralization (MIH) among a group of children in Jeddah, Saudi Arabia. Methods.
S. Allazzam, S. Alaki, Omar A El Meligy
semanticscholar   +1 more source

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

open access: yesAdvanced 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   +6 more
wiley   +1 more source

A Perspective on Powder Metallurgy and Additive Manufacturing of High‐Nitrogen Alloyed Stainless Steels

open access: yesAdvanced Engineering Materials, EarlyView.
This perspective article explores an innovative powder metallurgical approach to producing high‐nitrogen steels by utilizing a mixture of stainless steel and Si3N4. This mixture undergoes hot isostatic pressing followed by direct quenching. The article also examines adapting this method to laser powder bed fusion (PBF‐LB/M) to overcome nitrogen ...
Louis Becker   +5 more
wiley   +1 more source

Dental caries characteristics in the first permanent molar in school age children.

open access: yesMedisur, 2009
Background: Dental caries is one of the main health problems in children. The first permanent molar presents caries more frequently than any other. Objective: To describe the characteristics of dental caries in the first permanent molars in children ...
Yoel González Beriau   +3 more
doaj  

Nonmetric traits in permanent teeth as clues to ethnicity in vidarbha subpopulation to aid forensic profiling: Pilot study

open access: yesJournal of Forensic Science and Medicine
Introduction: Nonmetric dental traits have a crucial role in ethnic classification of populations that help in forensic racial identification. Many studies have demonstrated the differences in the expression and frequency of dental traits between various
Vaishali Amarlal Sadhwani   +5 more
doaj   +1 more source

Multiple unilateral accessory mandibular foramina- a case report

open access: yesNational Journal of Clinical Anatomy, 2012
Accessory foramina in the mandible are known to transmit branches of nerves supplying the roots of the teeth. The mandibular foramen is present on the inner surface of the ramus of the mandible which transmits the inferior alveolar nerve.
Seema, Anupama Mahajan
doaj   +1 more source

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