965 research outputs found
(G,ϕ) -crossed product on (G,ϕ)-quasiassociative algebras
No full textThe notions of (G,ϕ)-crossed product and quasicrossed system are introduced in the setting of (G,ϕ)-quasiassociative algebras, i.e., algebras endowed with a grading by a group G, satisfying a ``quasiassociative'' law. It is presented two equivalence relations, one for quasicrossed systems and another for (G,ϕ)-crossed products. Also the notion of graded-bimodule in order to study simple (G,ϕ)-crossed products is studied.∗The first and the second authors acknowledge financial assistance by the Centre
for Mathematics of the University of Coimbra – UID/MAT/00324/2013, funded by the
Portuguese Government through FCT/MEC and co-funded by the European Regional
Development Fund through the Partnership Agreement PT2020. The third author
acknowledges the Fundação para a Ciência e a Tecnologia for the grant with reference
SFRH/BPD/101675/2014.
The authors would like to thank the referee for the detailed reading of this work and for his helpful suggestions which have improved the final version of the same.
The first and the second authors acknowledge financial assistance by the Centrefor Mathematics of the University of Coimbra – UID/MAT/00324/2013, funded by the Portuguese Government through FCT/MEC and co-funded by the European Regional Development Fund through the Partnership Agreement PT2020. The third authorac knowledges the Fundação para a Ciência e a Tecnologia for the grant with referenceSFRH/BPD/101675/2014
(G,ϕ) -crossed product on (G,ϕ)-quasiassociative algebras
No full textThe notions of (G,ϕ)-crossed product and quasicrossed system are introduced in the setting of (G,ϕ)-quasiassociative algebras, i.e., algebras endowed with a grading by a group G, satisfying a ``quasiassociative'' law. It is presented two equivalence relations, one for quasicrossed systems and another for (G,ϕ)-crossed products. Also the notion of graded-bimodule in order to study simple (G,ϕ)-crossed products is studied.∗The first and the second authors acknowledge financial assistance by the Centre
for Mathematics of the University of Coimbra – UID/MAT/00324/2013, funded by the
Portuguese Government through FCT/MEC and co-funded by the European Regional
Development Fund through the Partnership Agreement PT2020. The third author
acknowledges the Fundação para a Ciência e a Tecnologia for the grant with reference
SFRH/BPD/101675/2014.
The authors would like to thank the referee for the detailed reading of this work and for his helpful suggestions which have improved the final version of the same.
The first and the second authors acknowledge financial assistance by the Centrefor Mathematics of the University of Coimbra – UID/MAT/00324/2013, funded by the Portuguese Government through FCT/MEC and co-funded by the European Regional Development Fund through the Partnership Agreement PT2020. The third authorac knowledges the Fundação para a Ciência e a Tecnologia for the grant with referenceSFRH/BPD/101675/2014
(G,ϕ) -crossed product on (G,ϕ)-quasiassociative algebras
No full textThe notions of (G,ϕ)-crossed product and quasicrossed system are introduced in the setting of (G,ϕ)-quasiassociative algebras, i.e., algebras endowed with a grading by a group G, satisfying a ``quasiassociative'' law. It is presented two equivalence relations, one for quasicrossed systems and another for (G,ϕ)-crossed products. Also the notion of graded-bimodule in order to study simple (G,ϕ)-crossed products is studied.∗The first and the second authors acknowledge financial assistance by the Centre
for Mathematics of the University of Coimbra – UID/MAT/00324/2013, funded by the
Portuguese Government through FCT/MEC and co-funded by the European Regional
Development Fund through the Partnership Agreement PT2020. The third author
acknowledges the Fundação para a Ciência e a Tecnologia for the grant with reference
SFRH/BPD/101675/2014.
The authors would like to thank the referee for the detailed reading of this work and for his helpful suggestions which have improved the final version of the same.
The first and the second authors acknowledge financial assistance by the Centrefor Mathematics of the University of Coimbra – UID/MAT/00324/2013, funded by the Portuguese Government through FCT/MEC and co-funded by the European Regional Development Fund through the Partnership Agreement PT2020. The third authorac knowledges the Fundação para a Ciência e a Tecnologia for the grant with referenceSFRH/BPD/101675/2014
Wave energy and the European transmission system
No full textMany questions remain regarding the exploitation of wave energy and its interaction with our energy systems. Particularly about their likely role in future multi-renewable power systems, given the resource’s abundance, predictability, and high energy density. The objective of this paper is to present the expansion of the renewable energy capabilities of an open-source dynamic energy system model with novel wave energy converters subroutines paired with high-resolution metocean from the ERA5. The expansion allows for the model to assess the wave energy technical resource across Europe’s coastlines; Estimate the renewable wave energy capacity potential; Derive renewable wave generation availability time series of different devices; And consider wave energy technologies in a power flow optimization of the European transmission grid. It establishes the basis to perform future exploratory investigations of wave energy converters under a high renewable European electricity grid.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Hydraulic EngineeringOffshore EngineeringEnergie and Industri
Design of Magnetic Variable stiffness actuator for legged hopper
No full textIn rough and highly unstructured terrain, legged locomotion exhibits remarkable capabilities when compared to wheeled systems. The mobility of the wheeled systems are restricted to continuous path with small obstacle, legged locomotion requires only few proper footholds to compromise those obstacle, this makes legged locomotion ideal for scenarios like stairs, gaps, soft surface and other obstacle. These remarkable advantages of legged locomotion have inspired and persuaded robotics researchers to design and build legged robots. Biological studies have proven that the joint elasticity attributes more to the efficiency and robustness of legged animals. This marked the advent of compliance in legged robots. After the introduction of series elastic actuator (SEA) by MIT leg laboratory, several variants were built based on it. Still they lack proper position control characteristics.This gave rise to the concept of Variable impedance. Variable stiffness actuators a subset of variable impedance actuator, where the stiffness are varied either by pre-compression or using a mechanical transmission. current designs are not capable of changing there stiffness at loaded condition and stiffness changing time is slow under unloaded condition. Recent works have shown theoretically, that by varying the leg stiffness at any instance of gait cycle, energy can be added and removed from the system. Similarly using this concept to design a theoretical framework for automated transition from walking to running and vice-versa for a SLIP biped by varying its leg stiffness. This motivates the development of a variable stiffness actuator that can change its stiffness at faster rate independent of its loaded condition. The thesis work aims at conceptualizing, designing and building a variable stiffness actuator which inherits the capability of the previous designs and additionally capable of faster stiffness change under loaded condition.BMDBioMechanical EngineeringMechanical, Maritime and Materials Engineerin
El servicio de referencia digital
No full textThis article analyses digital reference services and offers definitions of the concept as well as recommendations about quality criteria and standardisation. A discussion follows covering the most important technologies from e-mail to web contact software that integrates e-mail, chat, MOO’s, videoconferencing and web co-navigation together with other functionality. The author describes the main projects developed in this area in the US and the UK, as well as specific experiences from Spain
Author Correction: Chronicles of nature calendar, a long-term and large-scale multitaxon database on phenology (Scientific Data, (2020), 7, 1, (47), 10.1038/s41597-020-0376-z)
No full textOvaskainen, O., Meyke, E., Lo, C., Tikhonov, G., Delgado, M.M., Roslin, T., Gurarie, E., Abadonova, M., Abduraimov, O., Adrianova, O., Akimova, T., Akkiev, M., Ananin, A., Andreeva, E., Andriychuk, N., Antipin, M., Arzamascev, K., Babina, S., Babushkin, M., Bakin, O., Barabancova, A., Basilskaja, I., Belova, N., Belyaeva, N., Bespalova, T., Bisikalova, E., Bobretsov, A., Bobrov, V., Bobrovskyi, V., Bochkareva, E., Bogdanov, G., Bolshakov, V., Bondarchuk, S., Bukharova, E., Butunina, A., Buyvolov, Y., Buyvolova, A., Bykov, Y., Chakhireva, E., Chashchina, O., Cherenkova, N., Chistjakov, S., Chuhontseva, S., Davydov, E.A., Demchenko, V., Diadicheva, E., Dobrolyubov, A., Dostoyevskaya, L., Drovnina, S., Drozdova, Z., Dubanaev, A., Dubrovsky, Y., Elsukov, S., Epova, L., Ermakova, O.S., Ermakova, O., Esengeldenova, A., Evstigneev, O., Fedchenko, I., Fedotova, V., Filatova, T., Gashev, S., Gavrilov, A., Gaydysh, I., Golovcov, D., Goncharova, N., Gorbunova, E., Gordeeva, T., Grishchenko, V., Gromyko, L., Hohryakov, V., Hritankov, A., Ignatenko, E., Igosheva, S., Ivanova, U., Ivanova, N., Kalinkin, Y., Kaygorodova, E., Kazansky, F., Kiseleva, D., Knorre, A., Kolpashikov, L., Korobov, E., Korolyova, H., Korotkikh, N., Kosenkov, G., Kossenko, S., Kotlugalyamova, E., Kozlovsky, E., Kozsheechkin, V., Kozurak, A., Kozyr, I., Krasnopevtseva, A., Kruglikov, S., Kuberskaya, O., Kudryavtsev, A., Kulebyakina, E., Kulsha, Y., Kupriyanova, M., Kurbanbagamaev, M., Kutenkov, A., Kutenkova, N., Kuyantseva, N., Kuznetsov, A., Larin, E., Lebedev, P., Litvinov, K., Luzhkova, N., Mahmudov, A., Makovkina, L., Mamontov, V., Mayorova, S., Megalinskaja, I., Meydus, A., Minin, A., Mitrofanov, O., Motruk, M., Myslenkov, A., Nasonova, N., Nemtseva, N., Nesterova, I., Nezdoliy, T., Niroda, T., Novikova, T., Panicheva, D., Pavlov, A., Pavlova, K., Petrenko, P., Podolski, S., Polikarpova, N., Polyanskaya, T., Pospelov, I., Pospelova, E., Prokhorov, I., Prokosheva, I., Puchnina, L., Putrashyk, I., Raiskaya, J., Rozhkov, Y., Rozhkova, O., Rudenko, M., Rybnikova, I., Rykova, S., Sahnevich, M., Samoylov, A., Sanko, V., Sapelnikova, I., Sazonov, S., Selyunina, Z., Shalaeva, K., Shashkov, M., Shcherbakov, A., Shevchyk, V., Shubin, S., Shujskaja, E., Sibgatullin, R., Sikkila, N., Sitnikova, E., Sivkov, A., Skok, N., Skorokhodova, S., Smirnova, E., Sokolova, G., Sopin, V., Spasovski, Y., Stepanov, S., Stratiy, V.I., Strekalovskaya, V., Sukhov, A., Suleymanova, G., Sultangareeva, L., Teleganova, V., Teplov, V., Teplova, V., Tertitsa, T., Timoshkin, V., Tirski, D., Tolmachev, A., Tomilin, A., Tselishcheva, L., Turgunov, M., Tyukh, Y., Vladimir, V., Vargot, E., Vasin, A., Vasina, A., Vekliuk, A., Vetchinnikova, L., Vinogradov, V., Volodchenkov, N., Voloshina, I., Xoliqov, T., Yablonovska-Grishchenko, E., Yakovlev, V., Yakovleva, M., Yantser, O., Yarema, Y., Zahvatov, A., Zakharov, V., Zelenetskiy, N., Zheltukhin, A., Zubina, T., Kurhinen, J
Environmental factors and host genotype control foliar epiphytic microbial community of wild soybeans across China
No full text© 2023 Zhou, Duan, García-Palacios, Yang, Cui, Yan, Yin, Yi, Li, Delgado-Baquerizo and Zhu. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these termsIntroduction: The microbiome inhabiting plant leaves is critical for plant health and productivity. Wild soybean (Glycine soja), which originated in China, is the progenitor of cultivated soybean (Glycine max). So far, the community structure and assembly mechanism of phyllosphere microbial community on G. soja were poorly understood.
Methods: Here, we combined a national-scale survey with high-throughput sequencing and microsatellite data to evaluate the contribution of host genotype vs. climate in explaining the foliar microbiome of G. soja, and the core foliar microbiota of G. soja were identified.
Results: Our findings revealed that both the host genotype and environmental factors (i.e., geographic location and climatic conditions) were important factors regulating foliar community assembly of G. soja. Host genotypes explained 0.4% and 3.6% variations of the foliar bacterial and fungal community composition, respectively, while environmental factors explained 25.8% and 19.9% variations, respectively. We further identified a core microbiome thriving on the foliage of all G. soja populations, including bacterial (dominated by Methylobacterium-Methylorubrum, Pantoea, Quadrisphaera, Pseudomonas, and Sphingomonas) and fungal (dominated by Cladosporium, Alternaria, and Penicillium) taxa.
Conclusion: Our study revealed the significant role of host genetic distance as a driver of the foliar microbiome of the wild progenitor of soya, as well as the effects of climatic changes on foliar microbiomes. These findings would increase our knowledge of assembly mechanisms in the phyllosphere of wild soybeans and suggest the potential to manage the phyllosphere of soya plantations by plant breeding and selecting specific genotypes under climate change.This study was supported by the National Natural Science Foundation of China (grant no. 41991332 and 42090063). MD-B acknowledges support from the Spanish Ministry of Science and Innovation for the I+D+i project PID2020-115813RA-I00 funded by MCIN/AEI/10.13039/501100011033. MD-B is also supported by a project of the Fondo Europeo de Desarrollo Regional (FEDER) and the Consejería de Transformación Económica, Industria, Conocimiento y Universidades of the Junta de Andalucía (FEDER Andalucía 2014–2020 Objetivo temático “01 – Refuerzo de la investigación, el desarrollo tecnológico y la innovación”) associated with the research project P20_00879 (ANDABIOMA).Peer reviewe
A vision-based motion estimator for a legged robot.
No full textDelft Center for Systems and ControlMechanical, Maritime and Materials Engineerin
On the use of Biplot analysis for multivariate bibliometric and scientific indicators
No full textBibliometric mapping and visualization techniques represent one of the main pillars in the field of scientometrics. Traditionally, the main methodologies employed for representing data are Multi-Dimensional Scaling, Principal Component Analysis or Correspondence Analysis. In this paper we aim at presenting a visualization methodology known as Biplot analysis for representing bibliometric and science and technology indicators. A Biplot is a graphical representation of multivariate data, where the elements of a data matrix are represented according to dots and vectors associated with the rows and columns of the matrix. In this paper we explore the possibilities of applying the Biplot analysis in the research policy area. More specifically we will first describe and introduce the reader to this methodology and secondly, we will analyze its strengths and weaknesses through three different study cases: countries, universities and scientific fields. For this, we use a Biplot analysis known as JK-Biplot. Finally we compare the Biplot representation with other multivariate analysis techniques. We conclude that Biplot analysis could be a useful technique in scientometrics when studying multivariate data and an easy-to-read tool for research decision makers
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