Search results for "Ocean engineering"

Tetrapod footprint ichno-associations from French Permian basins. Comparisons with other Euramerican ichnofaunas.

2006

21 pages; In order to take into account the studies of the European and American (USA) collections carried out by one of the authors, and of the recent nomenclatural revisions from new footprint discoveries, which have occurred during the last decade, the authors present a critical review of the French Permian palichnofauna. The distribution of the ichnospecies in the stratigraphy of the Lodève Basin, taken as a reference, is outlined. The ichno-associations are then compared with those of other French (Provence), European (Italy, Germany) and USA basins. Based on the ages of different ichnofossiliferous formations, three successive ichnofaunal units can be distinguished in the Permian of E…

Enzyme recovery and fouling mitigation by ultrasound-enhanced ultrafiltration

2013

Abstract The development of second-generation biofuels from cellulosic/lignocellulosic biomass has advantages from energy and environmental aspects, but the overall cost of the process is mainly dependent on the cost of the enzymes. Enzyme recovery and recycling is one of the most important and effective means of increasing the efficiency of enzymatic hydrolysis processes by lowering the enzyme costs. The primary objective of this study was to investigate the possibilities of enzyme recovery by membrane separation. Ultrafiltration (UF) membranes with various cut-off values and materials were used to recycle cellulase and cellobiase in model solutions and cellulosic hydrolysates. The membran…

Fracture and vein patterns as indicators of deformation history: a numerical study

2005

A non-linear stochastic approach of ligaments and tendons fractional-order hereditariness

2020

Abstract In this study the non-linear hereditariness of knee tendons and ligaments is framed in the context of stochastic mechanics. Without losing the possibility of generalization, this work was focused on knee Anterior Cruciate Ligament (ACL) and the tendons used in its surgical reconstruction. The proposed constitutive equations of fibrous tissues involves three material parameters for the creep tests and three material parameters for relaxation tests. One-to-one relations among material parameters estimated in creep and relaxations were established and reported in the paper. Data scattering, observed with a novel experimental protocol used to characterize the mechanics of the tissue, w…

Vers une approche globale de l'évolution des Hominidés

1998

Abstract Two models of diversification of the common ancestor of gorillas, chimpanzees and men can be proposed on the basis of the distribution of chromosomal rearrangements in extant species and reconsideration of the role played by climate. The small genetic divergence between chimpanzees and humans is greatly amplified at the morphological level, thus constituting the ‘human paradox’. This paradox is resolved by the economical and flexible evolutionary mechanism of mutations in regulator genes and the heterochronies they control, which are the true internal clocks of evolution. Changes in cranial morphology are quantified and used to analyse and explain the steps in the transition from g…

The origin of fibrous veins: constraints from geochemistry

2002

Identifying the characteristics of China’s maritime trading partners on the basis of bilateral shipping connectivity: a cluster analysis

2021

China is ranked as the number one maritime connected country in the world. This study attempts to analyse the characteristics of its 155 maritime trading partners. Five components of maritime conne...

Evolution saisonnière des corrélations entre précipitations en Afrique guinéenne et températures de surface de la mer (1945–1994)

1997

Resume Les precipitations en Afrique de l'Ouest au sud de 10∘ N ont fortement baisse entre les decennies 1950 et 1980, pour tous les mois, excepte juillet et aout. Une analyse des correlations entre temperatures de surface de mer et precipitations sur la periode 1945–1994 montre que: 1) la grande saison seche (novembre a avril) ainsi que la premiere saison des pluies (mai-juin) sont associees a une structure globale de correlations, negatives/positives dans l'hemisphere Sud/Nord ; 2) la petite saison seche (juillet-aout) est associee a des correlations positives dans l'Atlantique Sud et equatorial ; 3) la deuxieme saison des pluies (septembre–octobre) est associee a des correlations positiv…

HEALTH BEHAVIORS OF UNDERGRADUATE STUDENTS: A COMPARISON OF PHYSICAL EDUCATION AND TECHNICAL FACULTIES

2016

INTRODUCTION: A healthy lifestyle is related to healthy practices, such as healthy diet, avoidance of psychoactive stimulants, appropriate level of physical activity, preventive behaviors, coping with stress, positive social relationships, and adjustments. University students do not usually engage in a healthy lifestyle. Moreover, excessive alcohol drinking among students is truly a health problem. OBJECTIVES : The primary objective of this study was to examine the association between alcohol drinking and healthy behaviors in undergraduate students from a large public technical university in the south of Poland (Europe). METHODS: A cross-sectional study was used with participants of 283 sec…

Corrigendum: ILTER – The International Long-Term Ecological Research Network as a Platform for Global Coastal and Ocean Observation

2020

CORRECTION ARTICLEA Corrigendum on ILTER – The International Long-Term Ecological Research Network as a Platform for Global Coastal and Ocean Observation. doi: 10.3389/fmars.2019.00527