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An Exhaustive Study of the Workspace Topologies of all 3R Orthogonal Manipulators with Geometric Simplifications
Description :
This paper analyses the workspace of the three-revolute orthogonal manipulators that have at least one of their DH parameters equal to zero. These manipulators are classified into different groups with similar kinematic properties. The classification criteria are based on the topology of the workspa...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
An Exhaustive Study of the Workspaces Tolopogies of all 3R Orthogonal Manipulators with Geometric Simplifications
Description :
This paper proposes a classification of three-revolute orthogonal manipulators that have at least one of their DH parameters equal to zero. This classification is based on the topology of their workspace. The workspace is characterized in a half-cross section by the singular curves. The workspace to...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
Nucléation, croissance et comportement de poussières dans les plasmas réactifs radiofréquence basse pression : Des nanocristaux aux grains submicroniques polycristallins
Author(s) :
Cavarroc, Marjorie
Description :
Les gaz ionisés contenant des particules solides, appelés plasmas poussiéreux, sont principalement utilisés pour le dépôt de couches minces et la synthèse de nanoparticules aux propriétés maîtrisées.
L'objectif de cette thèse était de synthétiser des poussières de taille et/ou composition chimi...
L'objectif de cette thèse était de synthétiser des poussières de taille et/ou composition chimi...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
Study on the hydraulic conductivity of Boom clay
Description :
The hydraulic conductivity is a key parameter in geotechnical engineering practice for the seepage and consolidation analysis. Experimental results show that the hydraulic conductivity is mainly governed by the soil porosity, and the correlations with void ratio are usually proposed. The validity of...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
Laboratory Hydro-mechanical Characterisation of Boom Clay at Essen and Mol
Author(s) :
Deng, Yongfeng
,
Tang, Anh-Minh
,
Cui, Yu-Jun
,
Nguyen, Xuan-Phu
,
Li, Xiang-Ling
,
Wouters, Laurent
Description :
Boom clay has been selected as a potential host rock formation for the geological disposal of radioactive waste in Belgium. In the present work, the hydro-mechanical behaviour of Boom clay samples from the borehole Essen-1 at a depth of 220 - 260 m and from HADES that is the underground rock laborat...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
Self-excited void instability in dusty plasmas: plasma and dust cloud dynamics during the heartbeat instability
Author(s) :
Mikikian, Maxime
,
Couëdel, Lénaïc
,
Cavarroc, Marjorie
,
Tessier, Yves
,
Boufendi, Laifa
Description :
When a three-dimensional dust cloud is present in a plasma, a dust-free region, called a void, is usually obtained in the plasma centre. Under certain conditions, this region exhibits a self-excited unstable behaviour consisting of successive contractions and expansions of its size. In this paper, t...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
Formation and behaviour of dust particle clouds in a radio-frequency discharge: results in the laboratory and under microgravity conditions
Author(s) :
Mikikian, Maxime
,
Boufendi, Laifa
,
Bouchoule, André
,
Thomas, Hubertus
,
Morfill, Gregor
,
Nefedov, Anatoly
,
Fortov, Vladimir
Description :
In this paper we report the first observation on submicron dust particle clouds grown in a radio-frequency sputtering discharge under microgravity conditions. These results have been obtained in the PKE-Nefedov (Plasma Kristall Experiment) chamber in the framework of a French–German–Russian programm...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
Particular Threshold Behavior of Dusty Plasma Instabilities
Author(s) :
Mikikian, Maxime
,
Cavarroc, Marjorie
,
Couëdel, Lénaïc
,
Tessier, Yves
,
Boufendi, Laifa
Description :
We show that some experimentally observed instabilities, concerning the void region of a dust cloud, are similar to oscillations obtained in chemical systems or neuronal dynamics. The time evolution of these instabilities follows a well-defined process particularly visible in the instability shape a...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
Dust Successive Generations in Ar/SiH4: Dust Cloud Dynamics
Description :
Successive generations of dust particles in an Ar/SiH4 plasma, are shown to take place in the void region. We evidence that this cyclic phenomenon is also related to self-excited low frequency oscillations. These different results are obtained by correlating several diagnostics. We studied dust part...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
Dusty Plasma Dynamics During a Void Instability: Heartbeat Instability
Author(s) :
Mikikian, Maxime
,
Couëdel, Lénaïc
,
Cavarroc, Marjorie
,
Tessier, Yves
,
Boufendi, Laïfa
Description :
When a three-dimensional dust cloud is present in a plasma, a dust-free region, called void, is usually observed in the plasma centre. Forces involved in the void existence are an inward electrostatic force and an outward ion drag one. Under certain conditions, this force balance can be disturbed an...
Repository :
HAL - Hyper Article on Line
Language(s) :
English