Search results for "COPT"

Wind gust estimation for precise quasi-hovering control of quadrotor aircraft

2021

Abstract This paper focuses on the control of quadrotor vehicles without wind sensors that are required to accurately track low-speed trajectories in the presence of moderate yet unknown wind gusts. By modeling the wind disturbance as exogenous inputs, and assuming that compensation of its effects can be achieved through quasi-static vehicle motions, this paper proposes an innovative estimation and control scheme comprising a linear dynamic filter for the estimation of such unknown inputs and requiring only position and attitude information. The filter is built upon results from Unknown Input Observer theory and allows estimation of wind and vehicle state without measurement of the wind its…

Expression of the Intracellular COPT3-Mediated Cu Transport Is Temporally Regulated by the TCP16 Transcription Factor

2018

[EN] Copper is an essential element in plants. When scarce, copper is acquired from extracellular environment or remobilized from intracellular sites, through members of the high affinity copper transporters family COPT located at the plasma membrane and internal membrane, respectively. Here, we show that COPT3 is an intracellular copper transporter, located at a compartment of the secretory pathway, that is mainly expressed in pollen grains and vascular bundles. Contrary to the COPT1 plasma membrane member, the expression of the internal COPT3 membrane transporter was higher at 12 h than at 0 h of a neutral photoperiod day under copper deficiency. The screening of a library of conditionall…

Diversity and distribution of feather lice on Greater Flamingoes (Phoenicopterus ruber roseus) in the Camargue, southern France

2002

Feather lice were collected from 2S0 chicks of the Greater Flamingo (Phoenicopterus ruber roseus Pallas) captured alive in the Camargue, southern France, in July 1997. Five louse species were identified: Colpocephalum heterosoma Piaget, Colpocephalum salimalii Clay and Trinoton femoratum Piaget of the family Menoponidae; Anaticola phoenicopteri (Coinde) and Anatoecus pygaspis (Nitzsch [in Giebel]) of the family Philopteridae. Our collecting results also show that there is body-site segregation among the several louse species inhabiting the same host individual.

USING AERIAL IMAGE ANALYSIS AS A TOOL FOR TOPSOIL, SOIL AND SUBSTRATE MAPPING IN VINEYARDS(BURGUNDY, FRANCE)

2013

International audience; In Burgundy, vineyards present a high diversity of Terroirs, controlled by complex interactions between natural and human factors. The relationship between these factors leads to define wine typicity. However, a better understanding of how Terroirs have been defined is necessary for the sustainable, rational management of vineyard soils.The objectives of the study are (i) to identify Terroirs variability in vineyards of Burgundy (France) at hillslope scale and (ii) to highlight natural (soil, substratum) and anthropogenic factors (management practices) controlling Terroir diversity.To study Terroir at a fine scale, we developed a method based on a very high spatial r…

Overparenting hurts me: how does it affect offspring psychological outcomes?

2021

This review focuses on a peculiar typology of parenting characterized by overprotection, overinvolvement, overcontrol and an excess of entanglement; academic literature refers to this parenting style with the term overparenting or helicopter parenting. An in-depth description of overparenting constitutes the first part of this review. The second part of this review reports empirical evidence regarding the effects of overparenting on offspring psychological outcomes with particular regard to internalizing and externalizing disorders, coping strategies and dysfunctional personality traits. Depression and anxiety symptoms are frequently exhibited in offspring exposed to overparenting, as well …

Flamingo studies: a general introduction.

2017

28 pages; International audience; Flamingos are among the most amazing birds in the world. The first part of this chapter provides a general introduction to the various extant species of flamingos, including their physical descriptions, unique characteristics, numbers in the wild, and geographical distributions. The second part depicts a brief history of the discovery and scientific study of flamingos, from the earlier accounts dating from the 16th century to the development of the first long-term studies of banded populations in the second half of the 20th century. The third and final part of this chapter offers some perspectives for future research.

Feinstruktur des ventralen mandibul�ren Muskelrezeptors bei Liposcelis bostrichophilus (Insecta, Psocoptera)

1989

Der ventrale Mandibel-Muskelrezeptor wird im Kopf von Liposcelis bostrichophilus (Psocoptera) nachgewiesen. Er zieht, median der Mandibel-Gelenkachse gelegen, vom vorderen Tentorium-Arm zur hinteren Mandibel-Basis und wird also wahrend der Abduktion der Mandibel gedehnt. Der Rezeptor besteht aus einer motorisch und sensorisch innervierten Muskelfaser und 10 bipolaren, multiterminalen Sinneszellen. Einige der Sinneszellen senden ihre Dendriten ins Innere des Rezeptor-Muskels, wo sie sich verzweigen und jeweils an den Z-Scheiben enden. Die ubrigen Sinneszellen bilden mit ihren Dendriten ein Bundel, das der Oberflache des Rezeptor-Muskels anliegt. Nur die ins Innere ziehenden Dendriten weisen …

A comparative analysis between helicopter and seaplane for passenger transport.

2016

Purpose This study aims to develop a methodology to compare the feasibility of helicopter and seaplane regular transport of passengers towards destinations across a remote regional tourist context, where a lack of road and rail infrastructure make these alternative forms of air transport competitive. Design/methodology/approach The authors use a modal split model identifying the quota of passengers that potentially could utilize these two types of services, determined on the basis of previous studies on air transport demand. A technical analysis regarding transport supply is performed to identify the predominant features that should characterize helicopter/seaplane performances. An optimiza…

– Una versione copta dell’omelia De Davide et Saule III di Giovanni Crisostomo trádita dal papiro VIII Orlandi (Torino, Museo Egizio

2009

Local Recruitment in the Greater Flamingo: A New Approach Using Capture- Mark-Recapture Data

1997

International audience; Although the establishment of new individuals in the breeding component of a population is an essential feature of population regulation, only a few attempts have been made to test biological hypotheses about recruitment. Most previous studies rely on ad hoc calculations or are flawed with unwarranted assumptions about survival. We use a recently developed approach, based on capture-mark-recapture, in which analysis of local recruitment is similar to a time-reversed analysis of survival. The basic data set consists of capture histories viewed in reverse order, with initial capture at year of birth, and subsequent observations corresponding to years when the animal ha…