Search results for "rives"
showing 10 items of 60 documents
Optimization of Delayed-State Kalman-Filter-based Algorithm via Differential Evolution for Sensorless Control of Induction Motors
2010
This paper proposes the employment of the differential evolution (DE) to offline optimize the covariance matrices of a new reduced delayed-state Kalman-filter (DSKF)-based algorithm which estimates the stator-flux linkage components, in the stationary reference frame, to realize sensorless control of induction motors (IMs). The DSKF-based algorithm uses the derivatives of the stator-flux components as mathematical model and the stator-voltage equations as observation model so that only a vector of four variables has to be offline optimized. Numerical results, carried out using a low-speed training test, show that the proposed DE-based approach is very promising and clearly outperforms a cla…
Les sites du lit mineur de la Saône en Chalonnais (Saône-et Loire) à la fin du Bronze final
2017
The underwater archaeological campaigns carried out over twenty years, from 1970 to 1990, in the Saône valley, more particularly in the area of Chalon-sur-Saône, first by Louis Bonnamour and then by Annie Dumont, generated a considerable quantity of data concerning settlements, located on fjords or river banks. This documentation, stored at the Musée Denon in Chalon-sur-Saône, was the subject of new studies, initiated by Jean-Michel Treffort for the Ouroux-sur-Saône “Marnay” site and continued by Franck Ducreux, notably for the Chalon-sur-Saône “le gué des Piles” site. On this occasion most of the sites of the region having yielded protohistoric assemblages were reconsidered. This article p…
Oriveden yhteiskoulun 8-luokkalaisten vapaa-ajan liikunta-aktiivisuus ja sen yhteys kestävyyskuntoon
2012
Tämän tutkimuksen tarkoituksena oli selvittää oppilaiden vapaa-ajan liikunta-aktiivisuuden yhteyttä kestävyyskuntoon sekä näiden yhteyttä ruutuajan käyttöön. Taustatekijöinä olivat urheiluseura-aktiivisuus sekä sukupuoli. Tutkimukseen osallistui 94 henkilöä, joista tyttöjä oli 55 ja poikia 39. Tutkimusjoukko koostui Oriveden yhteiskoulun 8-luokkalaisista oppilaista, joista kaikki kyselyn toteuttamispäivänä koulussa olleet oppilaat osallistuivat kyselyyn. Kysely toteutettiin syksyllä 2010 oppilaiden normaalien oppituntien alussa luokkatilassa yhden päivän aikana. Cooperin testin suoritti yhteensä 84 henkilöä, josta tyttöjä oli 46 ja poikia 38. Cooperin testit juostiin syksyn 2010 aikana oppi…
The “Seili-index” For The Prediction of Chlorophyll-α Levels In The Archipelago Sea of The Northern Baltic Sea, Southwest Finland
2021
AbstractTo build a forecasting tool for the state of eutrophication in the Archipelago Sea, we fitted a Generalized Additive Mixed Model (GAMM) to marine environmental monitoring data, which were collected over the years 2011–2019 by an automated profiling buoy at the Seili ODAS-station. The resulting “Seili-index” can be used to predict the chlorophyll-α (chl-a) concentration in the seawater a number of days ahead by using the temperature forecast as a covariate. An array of test predictions with two separate models on the 2019 data set showed that the index is adept at predicting the amount of chl-a especially in the upper water layer. The visualization with 10 days of chl-a level predict…
Progrip self-gripping mesh in Rives-Stoppa repair: Are there any differences in outcomes versus a retromuscular polypropylene mesh fixed with sutures…
2017
Highlights • The Rives-Stoppa technique is an excellent repair in midline incisional hernia. • Prospective comparative analysis between retromuscular Self-gripping mesh and PPL fixed with sutures. • Self-gripping mesh is related to less postoperative pain the first 48 h after repair. • There were more postoperative hematomas in Non-Progrip group. • There were no differences in hernia recurrence in both groups.
Increased sulfate availability in saline water promotes hydrogen sulfide production in fish organic waste
2020
The risk of hydrogen sulfide (H2S) production can be a challenge in marine land-based recirculating aquaculture systems (RAS). Hydrogen sulfide is a toxic gas that can cause massive fish mortality even at low concentrations, and in addition, serious odour problems in the surroundings. It is a bacterial by-product originating from the degradation of organic matter in sulfur-rich waters such as marine waters. In order to hinder H2S production in marine land-based RAS, more information on the H2S production conditions and the associated microbiology is needed. In this study, the production of H2S from rainbow trout (Oncorhynchus mykiss) organic waste was examined using a novel H2S measurement …
Design and Performance Evaluation of a High Power-Density EMI Filter for PWM Inverter-Fed Induction-Motor Drives
2016
This paper presents the design of an electromagnetic interference (EMI) filter for a low-voltage high-current induction-motor drives supplied by dc power grids. In order to effectively design the EMI filter, a suitable common-mode/differential-mode (CM/DM) separation technique has been used. Due to the high operating currents, the software-based separation technique using time-domain measurements has been applied. The proposed technique allows the CM and DM sections of the EMI filter to be properly selected in a more economical way, i.e., without the need of a dedicated hardware or costly radio frequency (RF) instrumentation. The design has been done according to a power-density criterion. …
Mater semper certa est ? Passé, présent, avenir d'un adage, Actes du colloque de Dijon des 24-25 novembre 2016, K. Fiorentino et A. Fiorentino (dir.)…
2018
International audience; La preuve de la filiation maternelle, résumée par l’un des adages les plus connus en droit de la famille, Mater semper certa est, a pendant longtemps semblé être une évidence voulue par la nature, donc ne posant que peu de problème juridique, à l’inverse de la paternité. Pourtant, l’évidence a-t-elle toujours été aussi flagrante ? Pourquoi ressentir le besoin de forger un adage ? Quelle fut sa valeur et a-t-il toujours parfaitement reflété la réalité ? Force est de constater que si la maternité est certaine, la preuve de celle-ci se heurte à plusieurs difficultés tant matérielles que processuelles. Il s’agit donc ici de s’interroger sur la place accordée en droit à l…
Intonaci e decorazioni in terra cruda espressione di un'arte ancestrale che si rinnova nel tempo
2014
In molte aree del nostro pianeta, nel passato come oggi, la terra viene utilizzata come unico materiale nella costruzione di tutti gli elementi architettonici e strutturali di un’abitazione. Il genio creativo dei costruttori, ispirati dalla natura stessa della materia prima, si esprime nella modellazione e decorazione di forme morbide e avvolgenti che armonizzano lo spazio trasformando il manufatto in un’opera d’arte unica e irripetibile. Numerose sono le tecniche sperimentate in tutto il mondo per la realizzazione di intonaci in terra cruda sufficientemente resistenti e durevoli nel tempo; così come altrettanto numerose sono le pratiche di preparazione e stesura delle decorazioni, spesso e…
The (im)possible success of disadvantaged students. Reflections on education, migration and social change
2019
The paper focuses on the ?unexpected pathways? of successful students with an immigrant background: these biographical routes, that seems socially impossible, raise theoretical issues around the individual-society, actor-structure relationship. Disadvantaged students who succeed represent a sociological challenge in the attempt to understand atypical situations and to identify the institutional processes and the structural opportunities that facilitate them, reducing ethnic inequalities in education. This framework is the starting point of the Su.Per. project (Success in educational pathways of students with immigrant background), based on the collection of written autobiographies of 65 imm…