Results 61 to 70 of about 48,747 (310)

Fluctuaciones de las variables físicas y químicas de los ríos Salí, Vipos y Tapia (Tucumán, Argentina)

Lilloa, 2007
Martínez De Marco, Silvia N.; Beatriz C. Tracanna; María A. Barrionuevo; María G. Navarro; Gladys S. Meoni & Adriana P. Chaile. “Fluctuaciones de las variables físicas y químicas de los ríos Salí, Vipos y Tapia (Tucumán, Argentina)”. Lilloa 44 (1-2). En
Silvia N. Martínez De Marco, Beatriz C. Tracanna, María A. Barrionuevo, María G. Navarro, Gladys S. Meoni, Adriana P. Chaile   +5 more
doaj  

Influence of Test Temperature and Test Frequency on Fatigue Life of Aluminum Alloy EN AW‐2618A

Advanced Engineering Materials, EarlyView.
The influence of test temperature and test frequency on the fatigue life of EN AW‐2618A is investigated. High‐cycle fatigue tests are performed at different test temperatures and frequencies on the 1000 h/230°C overaged state. Both test parameters reduce fatigue life due to time‐dependent damage mechanisms.
Ying Han, Julian M. Rosalie, Jan Radners, Mauro Madia, Philipp von Hartrott, Birgit Skrotzki   +5 more
wiley   +1 more source

High‐Temperature Nanoindentation of Metals: Assessing Thermal Drift, Frame Compliance, and Chemical Composition Effects on the Reported Mechanical Properties

Advanced Engineering Materials, EarlyView.
Do not let thermal drift and instrument artifacts deceive high‐temperature nanoindentation results. We compare classical Oliver–Pharr and automatic image recognition analyses across steels and a Ni alloy to quantify these effects. Accounting for artifacts reveals systematic softening with temperature, while Cr and Ni additions boost resistance ...
Velislava Yonkova, Steffen Brinckmann, Ruth Schwaiger   +2 more
wiley   +1 more source

Políticas de control y regulación ambiental

Expresión Económica, 2016
En el presente trabajo se analiza la literatura referente a la aplicación de políticas ambientales específicas por parte del gobierno que empaten armónicamente el progreso económico y la sustentabilidad en el largo plazo.
Salvador Sandoval Bravo
doaj   +1 more source

O uso do cadastro técnico multifinalitário na avaliação de impactos ambientais e na gestão ambiental na mineração do carvão: estudo de caso Mina do Trevo, Rio Albina, Siderópolis SC / [PDF]

, 2000
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico.O objetivo desta pesquisa é a análise e avaliação ambiental de uma área onde vem ocorrendo mineração de carvão no subsolo, denominada "Mina do Trevo" e outra onde houve ...
Bortot, Adhyles
core  

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

Advanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara, Vincent Rat, Quentin Dubreuil, Patrice Valorge, Simon Goutier, Alain Denoirjean, Olivier Messe, Céline Ruelle, Jean‐Philippe Poli   +8 more
wiley   +1 more source

Manejo integral de un brote de dengue en el corregimiento la Buitrera, Santiago de Cali, Colombia

Interdisciplinary Journal of Epidemiology and Public Health
Antecedentes: El dengue es una arbovirosis de alta prevalencia, con gran impacto epidemiológico, social y económico a nivel mundial. En Cali, esta enfermedad presenta un comportamiento asincrónico.
Olga Lucía Velásquez Escobar, Olga Lucía Cuéllar, Clara Inés Solís Sandoval, Walter Correa, Nelson Hinestroza, Jaime López Velasco, Eduardo Cruz, Genny Martinez   +7 more
doaj   +1 more source

Direct Metal Deposition of Graphene–Ti28Nb35.4Zr Matrix Composites With Enhanced Mechanical, Corrosion, and Biocompatibility Properties for Bone Implants

Advanced Engineering Materials, EarlyView.
Graphene nanoplatelet (0.1 wt.%) reinforcement significantly enhances the performance of β Ti‐28Nb‐35.4Zr alloy. Grain refinement, reduced water contact angle, and improved surface characteristics promote osteoblast adhesion and complete surface coverage after 7 days.
Khurram Munir, Jixing Lin, Yuncang Li, Li Zhu, Paul F. A. Wright, Cuie Wen   +5 more
wiley   +1 more source

Um aporte da Contabilidade à Gestão Ambiental: estudo de Caso em uma empresa do Ramo Cerâmico [PDF]

, 2007
TCC (Graduação) - Universidade Federal de Santa Catarina. Centro Socioeconômico. Curso de Ciências ContábeisDurante um longo período, e com mais intensidade a partir da revolução industrial, observou-se uma exploração indevida dos recursos naturais, que ...
Furtado, Ana Paula Peixoto
core  

Encyclopedia of 2D β′‐In2Se3 Growth Using Chemical Vapor Deposition: The Effects of Synthesis Parameters Onto Material Quality

Advanced Engineering Materials, EarlyView.
A distinct semi‐confined inner‐tube chemical vapor deposition geometry enables reproducible, large‐area growth of phase‐pure 2D β′‐In2Se3 from InI + Se precursors. Engineering local vapor transport and optimizing precursor delivery and temperature–time conditions yield uniform continuous films.
Dasun P. W. Guruge, P. Sanju S. Panawala, Joseph F. S. Fernando, Zhenhuan Chen, Chao Zhang, Dong‐Chen Qi, Liangzhi Kou, Konstantin L. Firestein, Dmitri V. Golberg   +8 more
wiley   +1 more source