Search results for "Frame of reference"
showing 5 items of 55 documents
Localization from inertial data and sporadic position measurements
2020
International audience; A novel estimation strategy for inertial navigation in indoor/outdoor environments is proposed with a specific attention to the sporadic nature of the non-periodic measurements. After introducing the inertial navigation model, we introduce an observer providing an asymptotic estimate of the plant state. We use a hybrid dynamical systems representation for our results, in order to provide an effective, and elegant theoretical framework. The estimation error dynamics with the proposed observer shows a peculiar cascaded interconnection of three subsystems (allowing for intuitive gain tuning), with perturbations occurring either on the jump or on the flow dynamics (depen…
Comparative Analyses between the Zero-Inertia and Fully Dynamic Models of the Shallow Water Equations for Unsteady Overland Flow Propagation
2018
The shallow water equations are a mathematical tool widely applied for the simulation of flow routing in rivers and floodplains, as well as for flood inundation mapping. The interest of many researchers has been focused on the study of simplified forms of the original set of equations. One of the most commonly applied simplifications consists of neglecting the inertial terms. The effects of such a choice on the outputs of the simulations of flooding events are controversial and are an important topic of debate. In the present paper, two numerical models recently proposed for the solution of the complete and zero-inertia forms of the shallow water equations, are applied to several unsteady f…
Validity of an inertial system for measuring velocity, force, and power during hamstring exercises performed on a flywheel resistance training device
2020
Background Inertial hamstring exercises promote functional changes leading to lower rates of hamstring injuries. However, variable training measurement systems have not been specifically validated for hamstring exercises. Accordingly, this study aimed to evaluate the validity of the Inertial Measurement System (IMS) to measure the velocity, force, and power during the performance of different hamstring exercises on a flywheel resistance training device. Methods Fifteen males (average age: 22.4 ± 2.5 years; body mass: 77.3 ± 9.8 kg; height: 179.5 ± 7.4 cm; weekly physical activity: 434.0 ± 169.2 min; years of strength training: 4.3 ± 2.2 years) performed the bilateral stiff-leg deadlift (SD…
Il pagamento al creditore apparente nella prospettiva di un diritto europeo dell'obbligazione
2009
Il saggio analizza l’istituto del pagamento al creditore apparente e ne offre una rilettura in chiave di modi di estinzione dell’obbligazione diverso dell’inadempimento fondato sulla rottura del nesso di correlazione tra debito e credito. Lo studio del pagamento al creditore apparente offre, inoltre, una decisiva conferma della nozione di obbligazione come rapporto giuridico al cui interno trovano la sintesi due situazioni giuridiche dal contenuto diverso: il debito e il credito. La diversità di contenuto di debito e credito rappresenta la più significativa caratteristica dell’obbligazione e fa segnare la distanza dalla nozione tradizionale di obbligazione connotata invece dalla specularità…
Netaisnas iedzīvošanās institūta regulējums Civillikumā, tā salīdzinājums ar kopējā modeļa projektu (draft common frame of reference)
2017
Par netaisnu iedzīvošanos pēc neatkarības atjaunošanas Latvijā rakstīts ārkārtīgi maz. Izsmeļošākais avots ir Civillikuma saistību tiesību daļas komentāri, kuri gan arī sastādīti pirms vairāk nekā 16 gadiem. Tiesu prakse gan rāda, ka strīdi no netaisnas iedzīvošanās izceļas pietiekami bieži, tomēr šobrīd likumā atrodamā sistēma ir arhaiska, smagnēja un sadrumstalota. Eiropā ir izstrādāts Kopējā modeļa projekts (Draft Common Frame of Reference), kurš netaisnas iedzīvošanās regulējumam veltījis atsevišķu grāmatu. Darbā autore analizē netaisnas iedzīvošanās sistēmu Civillikumā un meklē efektīvāko regulējumu šim institūtam, salīdzinot to ar Kopējā modeļa izstrādāto netaisnas iedzīvošanās sistēm…