-
Article
Open AccessInferring the diurnal variability of OH radical concentrations over the Amazon from BVOC measurements
The atmospheric oxidation of biogenic volatile organic compounds (BVOC) by OH radicals over tropical rainforests impacts local particle production and the lifetime of globally distributed chemically and radiat...
-
Article
De Sitter-Invariant Special Relativity and Galaxy Rotation Curves
Owing to the existence of an invariant length at the Planck scale, Einstein’s special relativity breaks down at that scale. A possible solution to this problem is arguably to replace the Poincaré-invariant Ein...
-
Article
87Sr/86Sr applied to age discrimination of the Palaeozoic carbonates of the Ossa-Morena zone (SW Iberia Variscides)
Four distinct Palaeozoic episodes of marine carbonate sedimentation are reported in the Ossa-Morena Zone (SW Iberian Variscides). Among them, the Cambrian and the Devonian episodes are those that are well repr...
-
Chapter
Lighting Assessment at Workplaces in a Granite Manufacturing Company
The workers’ safety and wellbeing is the key to achieve higher levels of productivity and efficiency. An adequate lighting is one of the factors that influences the workplace and consequently, the comfort and ...
-
Article
Enhanced UV Flexible Photodetectors and Photocatalysts Based on TiO2 Nanoplatforms
In this study, titanium dioxide (TiO2) nanostructured films were synthesized under microwave irradiation through low temperature synthesis (80 °C) and integrated in ultraviolet (UV) photodetectors and as photocat...
-
Article
Open AccessStrong sesquiterpene emissions from Amazonian soils
The Amazon rainforest is the world’s largest source of reactive volatile isoprenoids to the atmosphere. It is generally assumed that these emissions are products of photosynthetically driven secondary metaboli...
-
Article
Cross-Diffusion Systems for Image Processing: II. The Nonlinear Case
In this paper we study the application of \(2\times 2\) ...
-
Article
Cross-Diffusion Systems for Image Processing: I. The Linear Case
The use of cross-diffusion problems as mathematical models of different image processes is investigated. Here the image is represented by two real-valued functions which evolve in a coupled way, generalizing t...
-
Chapter and Conference Paper
Industrial Plant Layout Analyzing Based on SNA
Social network analysis (SNA) is a widely studied research topics, which has been increasingly being applied for solving different kind of problems, including industrial manufacturing ones. This paper focuses ...
-
Article
On the spacetime connecting two aeons in conformal cyclic cosmology
As quotient spaces, Minkowski and de Sitter are fundamental, non-gravitational spacetimes for the construction of physical theories. When general relativity is constructed on a de Sitter spacetime, the usual R...
-
Article
Open AccessMortality in an ICU of a tertiary hospital
-
Article
Pro- and Anticonvulsant Effects of the Ant Dinoponera quadriceps (Kempf) Venom in Mice
Epilepsy affects at least 50 million people worldwide, and the available treatment is associated with various side effects. Approximately 20–30% of the patients develop seizures that persist despite careful mo...
-
Chapter and Conference Paper
On the Experimental Intradiscal Pressure Measurement Techniques: A Review
The intradiscal pressure has been essential for prevent the spinal complaints by forming a basis for clinical advice to promote the correct sitting postures. As a consequence, it is evident the need of an accu...
-
Article
Ag and Sn Nanoparticles to Enhance the Near-Infrared Absorbance of a-Si:H Thin Films
Silver (Ag) and tin (Sn) nanoparticles (NPs) were deposited by thermal evaporation onto heated glass substrates with a good control of size, shape and surface coverage. This process has the advantage of allowi...
-
Article
Biodegradation assessment of PLA and its nanocomposites
Poly(lactic acid) nanocomposites containing Cloisite 15A, Cloisite 30B, and Dellite 43B were prepared by melt-mixing in a batch mixer and were exposed to UV radiation, temperature, and microorganism in solutio...
-
Article
Workers’ Extra-Nest Behavioral Changes During Colony Fission in Dinoponera quadriceps (Santschi)
Ant colonies can reproduce by two strategies: independent foundation, wherein the queen starts a new colony alone, and dependent foundation, in which workers assist the queen. In the queenless species Dinoponera ...
-
Article
Open AccessInfluence of the layer thickness in plasmonic gold nanoparticles produced by thermal evaporation
Metallic nanoparticles (NPs) have received recently considerable interest of photonic and photovoltaic communities. In this work, we report the optoelectronic properties of gold NPs (Au-NPs) obtained by deposi...
-
Chapter
Laboratory for Computational Mathematics: An Interface Between Academia and Industry
“If Europe is to achieve its goal of becoming the leading knowledge-based economy in the world, mathematics has a vital role to play” (MACSI-net 2004). In spite of the fact that in many industrial sectors the ...
-
Article
1280 What Parents (Don't) Know About Oral Hygiene…
Background and aims: In 2005, the Portuguese National Program for the Promotion of Oral Health was published, with the aim to reduce oral cavity's diseases since the birthday until adulthood. With this study, ...
-
Article
485 Evaluation of Oral Hygiene Habits in a Portuguese Primary School Children Population
Background and aims: Good oral hygiene habits should be implemented very soon in children's development. It is important to quantify the improvements and the dental plaque index can be an easy mean to do it.
