Export 4246 results:
Sort by: Author Title Type [ Year  (Desc)]
2018
Braslavsky, {Isaak Ya}, {Vladimir P. } Metelkov, {Alex V. } Kostylev, and Stanimir Valtchev. "On reliability and energy efficiency increasing of the vehicles electric drives." Proceedings - 2018 17th International Ural Conference on AC Electric Drives, ACED 2018. Vol. 2018-April. United States: Institute of Electrical and Electronics Engineers Inc., 2018. 1-6. Abstract

Problem of the reliability increasing of the vehicles electric drives is discussed in context of the reduction of the electric motor heating during variable character of movement. Opportunities of the induction motor stator winding heating reduction by means of the control of the vehicles electric drives in transient and steady state modes of movement are shown. Analytical expressions for dynamic torque, optimal on minimal of the winding temperature rise during acceleration, as well as expressions for dynamic torque and value of the motor torque limitation, optimal on energy consumption during acceleration are presented. It is shown that desire to reduce the stator winding temperature rise by means of dynamic torque optimal value selection or motor torque limitation can lead to the rise of energy consumption. Results of the modeling are presented.

Baikova, {E. N. }, L. Romba, {S. S. } Valtchev, R. Melicio, V. {Fernão Pires}, A. Krusteva, and G. Gigov. "Electromagnetic field generated by a wireless energy transfer system: comparison of simulation to measurement." Journal of Electromagnetic Waves and Applications. 32 (2018): 554-571. Abstract

This paper presents a wireless energy transfer system operating at the frequency values of kHz order: modeling, simulation, and comparison with prototype measurement results. Wireless energy transfer system model using finite element method was carried out to simulate the electric field and the magnetic flux density for different air gap sizes between the transmitter and the receiver coils. Results are presented and compared with the electromagnetic emission measurements radiated by the wireless energy transfer system prototype. The electric field comparison between the simulated and the prototype measurement values shows an error of roughly 8.7{%}. In the recent years, the interest in the wireless energy transfer technology, especially for electric vehicles batteries charging, is rapidly increasing. As a result of the increasing application of this technology in the industrial and consumer electronic products, more concerns are raised about the electromagnetic compatibility, since the wireless energy transfer systems produce electromagnetic emissions in the surrounding environment.

Pereira, Pedro, and João Martins. "Sustainable Heritage Management Towards Mass Tourism Impact: the HERIT-DATA project." 9th International Conference on Intelligent Systems IS’18. Madeira - PT: IEEE, 2018. Abstract

Although tourism is a major engine of economic growth, it also creates a burden hard to manage, and has a great impact on the conservation of the heritage. The HERIT-DATA project aims to reduce the impact of human activities, related to tourism, on cultural heritage, with a special focus on two kind of cultural destinations that can benefit from and be affected by mass tourism: Old towns and places of specific cultural heritage or archaeological interest for visitors, including UNESCO World Heritage Sites. In that framework, HERIT-DATA plans to develop of a sustainable and responsible tourism management towards cultural heritage in MED regions, in particular by taking advantage of technology and innovation in management tools (Smart Cities), as well as other policy and social measures.

Al-Mansoori, T., J. Norambuena-Contreras, R. Micaelo, and A. Garcia. "Self-healing of asphalt mastic by the action of polymeric capsules containing rejuvenators." Construction and Building Materials. 161 (2018): 330-339. AbstractWebsite

n/a

Ferrari, Arianna, Brandão A. Moniz, Christopher Coenen, Daniel Frank, Helge Torgersen, Leonhard Hennen, Ingrid Geesink, and Emilio Mordini Additive bio-manufacturing: 3D printing for medical recovery and human enhancement. Strasbourg: European Parliament, 2018. Abstracteprs_ida2018614571ann1_en.pdf

Additive manufacturing (commonly known as 3D printing or rapid prototyping) refers to processes used to produce parts in an additive manner by means of computer-aided design (CAD). While additive manufacturing is a technology that can be used in many different application areas, this project focuses on future trends in additive manufacturing (AM) aimed at improving biological functionality (bio-AM) and on its opportunities, barriers and challenges. The big advantage of this technique is that small batches can be produced more economically than with any other manufacturing process. Virtually any structure can be customized, which is particularly important in the healthcare sector. Possible applications include biological implants such as organs and tissues, nutrients, drugs and their transport mechanisms, equipment such as surgical knives and drilling guides, tissues for research, development and training, and personalized prostheses, supports and exoskeletons. Besides exploring such applications, the project will also systematically analyze potential "human enhancement" uses of AM technology and developments in the emerging do-it-yourself (DIY) cultures ("bio/body-hacking"; cyborgism; open source 3D printing movement).

In the first phase of the project, the technological state of the art will be analyzed, as will a wide variety of non-technical aspects, regulatory issues and future trends, also with a special focus on sociotechnical imaginaries (e.g., in science fiction), human enhancement and DIY cultures. This horizon scanning will be accomplished partly by means of expert and stakeholder interviews.

In the second phase, the project will use a variety of foresight and technology assessment methods and will carry out a 360° envisioning exercise with contributions by external experts, entailing an in-depth analysis of selected applications of bio-AM.

The project work will end with a scenario development phase in which the focus will be on likely outcomes of already emerging developments, though further-reaching future perspectives will be taken into account to a certain extent. Taken together, these scenarios will allow for both a broader understanding of the wide range of potential impacts of AM applications and a clearer picture of potential policy challenges relevant to the Members of the European Parliament.

Baptista, AC, I. Ropio, B. Romba, JP Nobre, C. Henriques, JC Silva, JI Martins, J. P. Borges, and I. Ferreira. "Cellulose-based electrospun fibers functionalized with polypyrrole and polyaniline for fully organic batteries." 6.1 (2018): 256-265. Abstract
n/a
Agnolin, Federico L., Octávio Mateus, Jesper Milàn, Marco Marzola, Oliver Wings, Jan Schulz Adolfssen, and Lars B. Clemmensen. "Ceratodus tunuensis, sp. nov., a new lungfish (Sarcopterygii, Dipnoi) from the Upper Triassic of central East Greenland." Journal of Vertebrate PaleontologyJournal of Vertebrate Paleontology (2018): e1439834. Abstractagnolin_et_al_2018_ceratodus_tunuensis_greenland.pdfWebsite

ABSTRACTThe fossil record of post-Paleozoic lungfishes in Greenland is currently restricted to a few brief reports of isolated and undetermined tooth plates coming from the uppermost Fleming Fjord Formation (late Norian) in Jameson Land, central East Greenland. Here, we describe Ceratodus tunuensis, sp. nov., a new dipnoan from a thin bed of calcareous lake mudstone from the ?rsted Dal Member of the Fleming Fjord Formation. The Ceratodus fossil record indicates that during the Late Triassic, this genus was restricted to the middle latitudes of the Northern Hemisphere. This record matches previous paleobiogeographical analyses and indicates that terrestrial biota during the Late Triassic was strongly influenced by paleolatitude.Citation for this article: Agnolin, F. L., O. Mateus, J. Milàn, M. Marzola, O. Wings, J. Schulz Adolfssen, and L. B. Clemmensen. 2018. Ceratodus tunuensis, sp. nov., a new lungfish (Sarcopterygii, Dipnoi) from the Upper Triassic of central East Greenland. Journal of Vertebrate Paleontology. DOI: 10.1080/02724634.2018.1439834.

Tschopp, Emanuel, Octávio Mateus, and Mark Norell. "Complex Overlapping Joints between Facial Bones Allowing Limited Anterior Sliding Movements of the Snout in Diplodocid Sauropods." American Museum NovitatesAmerican Museum Novitates.3911 (2018): 1-16. Abstracttschopp_et_al_2018.pdfWebsite

ABSTRACT Diplodocid sauropods had a unique skull morphology, with posteriorly retracted nares, an elongated snout, and anteriorly restricted, peglike teeth. Because of the lack of extant analogs in skull structure and tooth morphology, understanding their feeding strategy and diet has been difficult. Furthermore, the general rarity of sauropod skulls and the fragility of their facial elements resulted in a restricted knowledge of cranial anatomy, in particular regarding the internal surface of the facial skull. Here, we describe in detail a well-preserved diplodocid skull visible in medial view. Diagnostic features recognized in other skulls observable in lateral view, such as the extended contribution of the jugal to the antorbital fenestra, are obliterated in medial view due to extensive overlapping joints between the maxilla, jugal, quadratojugal, and the lacrimal. These overlapping joints permitted limited anterior sliding movement of the snout, which likely served as a kind of ?shock-absorbing? mechanism during feeding. Diplodocid skulls therefore seem to have evolved to alleviate stresses inflicted on the snout during backward movements of the head, as would be expected during branch-stripping or raking.ABSTRACT Diplodocid sauropods had a unique skull morphology, with posteriorly retracted nares, an elongated snout, and anteriorly restricted, peglike teeth. Because of the lack of extant analogs in skull structure and tooth morphology, understanding their feeding strategy and diet has been difficult. Furthermore, the general rarity of sauropod skulls and the fragility of their facial elements resulted in a restricted knowledge of cranial anatomy, in particular regarding the internal surface of the facial skull. Here, we describe in detail a well-preserved diplodocid skull visible in medial view. Diagnostic features recognized in other skulls observable in lateral view, such as the extended contribution of the jugal to the antorbital fenestra, are obliterated in medial view due to extensive overlapping joints between the maxilla, jugal, quadratojugal, and the lacrimal. These overlapping joints permitted limited anterior sliding movement of the snout, which likely served as a kind of ?shock-absorbing? mechanism during feeding. Diplodocid skulls therefore seem to have evolved to alleviate stresses inflicted on the snout during backward movements of the head, as would be expected during branch-stripping or raking.

Biscaia, Hugo, Rui Micaelo, Carlos Chastre, and João Cardoso. "Cyclic Loading Behaviour of Double Strap Bonded Joints with CFRP and Aluminium." Key Engineering Materials. 774 (2018): 36-41. AbstractWebsite

The adhesively bonded joints behaviour under cyclic loading is not yet well understood due to its inherent complexity. Numerical approaches appear, therefore, as the easiest way to simulate such mechanical behaviour. In this work, double strap bonded joints with Carbon Fibres Reinforced Polymers (CFRP) and aluminium are numerically simulated and subjected to a cyclic loading history. In the numerical simulation, the Distinct Element Method (DEM) is used and it is assumed cohesive bi-linear bond-slip models with local damage of the interface. The evaluation of the bonded joints under cyclic loading is made by comparing the results with those simulated with a monotonic loading.

Samhan-Arias, A. K., S. Fortalezas, C. M. Cordas, I. Moura, JJG Moura, and C. Gutierrez-Merino. "Cytochrome b5 reductase is the component from neuronal synaptic plasma membrane vesicles that generates superoxide anion upon stimulation by cytochrome c." Redox Biology. 15 (2018): 109-114. AbstractWebsite
n/a
Matos, Ricardo JR, Catarina IP Chaparro, Jorge C. Silva, Manuel Almeida Valente, João Paulo Borges, and Paula I. P. Soares. "Electrospun composite cellulose acetate/iron oxide nanoparticles non-woven membranes for magnetic hyperthermia applications." (2018). Abstract
n/a
Carreira, C., O. Mestre, R. F. Nunes, I. Moura, and S. R. Pauleta. "Genomic organization, gene expression and activity profile of Marinobacter hydrocarbonoclasticus denitrification enzymes." PeerJ. 2018.9 (2018). AbstractWebsite
n/a
Cidade, M. T., DJ Ramos, J. Santos, N. Calero, J. Muñoz, and J. P. Borges. "Injectable hydrogels based on pluronic/water systems filled with alginate microparticles: Rheological characterization." Vol. 1981. AIP Publishing, 2018. 020091. Abstract
n/a
Santarsia, Sabrina, Ana Sofia Grosso, Filipa Trovão, Jesús Jiménez-Barbero, Ana Luísa Carvalho, Cristina Nativi, and Filipa Marcelo. "Molecular recognition of a Thomsen-Friedenreich antigen mimetic targeting human galectin-3." ChemMedChem. Aug 9. doi: 10.1002/cmdc.201800525. [Epub ahead of print] (2018). AbstractWebsite

Overexpression of the Thomsen-Friedenreich (TF) antigen in cell membrane proteins occurs in 90% of adenocarcinomas. Additionally, the binding of the TF-antigen to human galectin-3 (Gal-3), also frequently overexpressed in malignancy, promotes cancer progression and metastasis. In this context, structures that interfere with this specific interaction display the potential to prevent cancer metastasis. Herein, a multidisciplinary approach, combining the optimized synthesis of a TF-antigen mimetic with NMR, X-ray crystallography methods and isothermal titration calorimetry assays has been employed to unravel the molecular structural details that govern the Gal-3/TF-mimetic interaction. The TF-mimetic presents a binding affinity for Gal-3 similar to the TF-natural antigen and retains the binding epitope and the bioactive conformation observed for the native antigen. Furthermore, from a thermodynamic perspective a decrease in the enthalpic contribution was observed for the Gal-3/TF-mimetic complex, however this behaviour is compensated by a favourable entropy gain. From a structural perspective, these results establish our TF-mimetic as a scaffold to design multivalent solutions to potentially interfere with Gal-3 aberrant interactions and likely be used to hamper Gal-3-mediated cancer cells adhesion and metastasis.

Gomes, F. O., L. B. Maia, C. Cordas, C. Delerue-Matos, I. Moura, JJG Moura, and S. Morais. "Nitric Oxide Detection Using Electrochemical Third-generation Biosensors – Based on Heme Proteins and Porphyrins." Electroanalysis. 30.11 (2018): 2485-2503. AbstractWebsite
n/a
Samhan-Arias, A. K., L. B. Maia, C. M. Cordas, I. Moura, C. Gutierrez-Merino, and JJG Moura. "Peroxidase-like activity of cytochrome b5 is triggered upon hemichrome formation in alkaline pH." Biochimica et Biophysica Acta - Proteins and Proteomics. 1866.2 (2018): 373-378. AbstractWebsite
n/a
Samhan-Arias, A. K., R. M. Almeida, S. Ramos, C. M. Cordas, I. Moura, C. Gutierrez-Merino, and JJG Moura. "Topography of human cytochrome b5/cytochrome b5 reductase interacting domain and redox alterations upon complex formation." Biochimica et Biophysica Acta - Bioenergetics. 1859.2 (2018): 78-87. AbstractWebsite
n/a
Maiti, B. K., L. B. Maia, AJ Moro, J. C. Lima, C. M. Cordas, I. Moura, and JJG Moura. "Unusual Reduction Mechanism of Copper in Cysteine-Rich Environment." Inorganic Chemistry. 57.14 (2018): 8078-8088. AbstractWebsite
n/a
Moniz, António B. Trabalho com robôs: um desafio para o movimento sindical. esquerda.net., 2018.
Mudrov, Mikhail, Anatoliy Ziuzev, Konstantin Nesterov, and Stanimir Valtchev. "Power electrical drive Power-Hardware-in-the-Loop system: 2018 X International Conference on Electrical Power Drive Systems (ICEPDS)." 2018 10th International Conference on Electrical Power Drive Systems, ICEPDS 2018 - Conference Proceedings. United States: Institute of Electrical and Electronics Engineers Inc., 2018. Abstract

Power Hardware-in-the-Loop (PHiL) system for electric drives application based on power converter with Field Programmable Gate Array (FPGA) -based control system which realizes in real time model of converter, motor and mechanism is discussed. Two PHiL structures are under consideration. Difference between both of them is shown. Test results obtained in the PHiLs with Converter Under Test (CUT) control system are presented in the paper. Proposed PHIL is intended for converters testing and for their operating modes studying. The PHIL repeats electric drive instantaneous current and angular velocity.

Mudrov, Mikhail, Anatoliy Ziuzev, Konstantin Nesterov, and Stanimir Valtchev. "Electric Drives Power-Hardware-in-the-Loop System Structures." 2018 20th European Conference on Power Electronics and Applications, EPE 2018 ECCE Europe. United States: Institute of Electrical and Electronics Engineers Inc., 2018. Abstract

Power-Hardware-in-the-Loop (PHiL) system for electric drives application based on power converter with Field Programmable Gate Array (FPGA)-based control system is discussed. PHiL structures are under discussion as well. During the PHiL mathematical model analysis instantaneous current repeating quality is increased. Variable frequency drive (VFD) was selected for testing.

Baikova, {E. N. }, L. Romba, R. Melicio, and {S. S. } Valtchev. "Simulation and experiment on electric field emissions generated by wireless energy transfer." Technological Innovation for Resilient Systems - 9th IFIP WG 5.5/SOCOLNET Advanced Doctoral Conference on Computing, Electrical and Industrial Systems, DoCEIS 2018, Proceedings. Eds. {L. M. } Camarinha-Matos, {K. O. } Adu-Kankam, and M. Julashokri. IFIP Advances in Information and Communication Technology. Springer New York LLC, 2018. 243-251. Abstract

This paper presents a wireless energy transfer (WET) system operating at the frequency of tens of kHz. It treats the modeling and simulation of WET prototype and its comparison with experimental measuring results. The wireless energy transfer system model was created to simulate the electric field between the emitting and the receiving coils, applying the finite element method. The results from the simulation are compared to the measured values of the electric field emission from the wireless energy transfer equipment. In the recent years the interest in the WET technology, especially for the electric vehicles (EV) batteries charging, is rapidly growing. The WET systems pollute the environment by electromagnetic emissions. Due to the expanding use of this technology in industrial and consumer electronics products, the problems associated with the electromagnetic compatibility (EMC), and the adverse impact on the human health becomes highly important.

Romba, L., {E. N. } Baikova, C. Borges, R. Melicio, and {S. S. } Valtchev. "Wireless battery charger for EV with circular or planar coils: comparison." Technological Innovation for Resilient Systems - 9th IFIP WG 5.5/SOCOLNET Advanced Doctoral Conference on Computing, Electrical and Industrial Systems, DoCEIS 2018, Proceedings. Eds. {L. M. } Camarinha-Matos, {K. O. } Adu-Kankam, and M. Julashokri. IFIP Advances in Information and Communication Technology. Springer New York LLC, 2018. 214-223. Abstract

This paper presents the experimental results obtained in the wireless energy transfer (WET) system prototype based on coils: circular or planar. With these experimental results we can choose the tuning settings to improve the efficiency of power transmission of the WET systems. In WET for electric vehicle batteries charging, the coil shape and the range between the coils are the most important issues of those systems.

Marzola, M., O. Mateus, and(eds) M. Moreno-Azanza Abstract book of the XVI Annual Meeting of the European Association of Vertebrate Palaeontology. XVI Annual Meeting of the European Association of Vertebrate Palaeontologists. Caparica: Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa, 2018.eavp_2018_abstract_book.pdf
Costa, F., and O. Mateus Alcovasaurus longispinus as a dacentrurine stegosaur (Dinosauria) and contributions to the diagnosis of Dacentrurinae. XVI Annual Meeting of the European Association of Vertebrate Palaeontologists, .Abstract Book. Abstract book of the XVI Annual Meeting of the European Association of Vertebrate Palaeontologists, Caparica, Portugal June 26th-July 1st, 2018., 2018. Abstractcosta__mateus_2018_eavp_abstract.pdf

n/a