27,111 research outputs found
Family structure and work satisfaction : can work-life balance policies foster happiness in the workplace?
Peripheral corridors: the post-metropolitan landscape of Leganes (Madrid) and Melville (Johannesburg)
The file attached to this record is the author's final peer reviewed versionThesis describing main arguments: This paper consists of a general history of the concept of periphery and aims to introduce the different definitions of periphery in architectural and other theories. It begins by setting out some of the difficulties encountered when attempting to define the periphery, before continuing with the three main parts to the paper. The first of these provides a general taxonomy and describes the characteristics of the periphery in architecture, based on historical general discourses; the second examines architectural discourse and typologies in more detail, developing a particular focus on the European context and thirdly it focuses in more detail on this difficulty of defining the peripheral condition in architecture theory. The architects Jonathan Woodroff, Dominic Papa and Ian Mac Burnie write (Woodroffe, J., Papa, D., and Mac Burnie, I 1994:6): âToday, it seems an almost impossible task to define a contemporary peripheral condition; and yet it is that very quality, its extreme elusiveness, that ensures its attractiveness for debate [âŠ] In Western Europe with the exception of Britain, the notion of periphery has historically been associated with the âmarginalââ.
This quote summarises recent discourse on peripheries, where the difficulty of the theme through its elusiveness has made the discourse marginal. So it is through these marginal figures that the exploration of the theme can be carried out in order to understand its language
Surface forces generated by the action of electric fields across liquid films
We explore the force generation and surface interactions arising when
electric fields are applied across fluid films. Using a surface force balance
(SFB) we measure directly the force between two electrodes in crossed-cylinder
geometry across dielectric and electrolytic fluids. In the case of dielectric
films the field between the electrodes exerts a force which can be well
explained using classic expressions and with no fitting parameters. However
when the electrodes are separated by a film of electrolyte, an alternating
electric field induces a force which diverges substantially from the calculated
static response of the electrolyte. The magnitude of the force is larger than
predicted, and the interaction can switch from attractive to repulsive.
Furthermore, the approach to steady state in electrolyte takes place over
-- ~s which is very slow compared to both the charging and viscous
timescales of the system. The non-trivial electrolyte response in AC electric
fields, measured here directly, is likely to underlie several recent reports of
unexpected and bifurcating forces driving colloids in AC fields. Our
measurements suggest ways to control colloidal and soft matter using electric
fields, as well as providing a direct measure of the length- and time-scales
relevant in AC electrochemical and electrokinetic systems
Magnetic Collapse of a Neutron Gas: No Magnetar Formation
A degenerate neutron gas in equilibrium with a background of electrons and
protons in a magnetic field exerts its pressure anisotropically, having a
smaller value perpendicular than along the magnetic field. For critical fields
the magnetic pressure may produce the vanishing of the equatorial pressure of
the neutron gas, and the outcome could be a transverse collapse of the star.
This fixes a limit to the fields to be observable in stable pulsars as a
function of their density. The final structure left over after the implosion
might be a mixed phase of nucleons and meson ()
condensate (a strange star also likely) or a black string, but no magnetar at
all.Comment: 5 pages, 1 latex file, 1 encapsulated figure. Submitted to Physical
Review Letters (24/11/2000
Magnetic collapse of a neutron gas: Can magnetars indeed be formed
A relativistic degenerate neutron gas in equilibrium with a background of
electrons and protons in a magnetic field exerts its pressure anisotropically,
having a smaller value perpendicular than along the magnetic field. For
critical fields the magnetic pressure may produce the vanishing of the
equatorial pressure of the neutron gas. Taking it as a model for neutron stars,
the outcome could be a transverse collapse of the star. This fixes a limit to
the fields to be observable in stable neutron star pulsars as a function of
their density. The final structure left over after the implosion might be a
mixed phase of nucleons and meson condensate, a strange star, or a highly
distorted black hole or black "cigar", but no any magnetar, if viewed as a
super strongly magnetized neutron star. However, we do not exclude the
possibility of a supersotrong magnetic fields arising in supernova explosions
which lead directly to strange stars. In other words, if any magnetars exist,
they cannot be neutron stars.Comment: 15 pages, 3 figures. European Physical Journal C in pres
INSA scientific activities in the space astronomy area
Support to Astronomy operations is an important and long-lived activity
within INSA. Probably the best known (and traditional) INSA activities are
those related with real-time spacecraft operations: Ground station maintenance
and operation (Ground station engineers and operators); spacecraft and payload
real-time operation (spacecraft and instruments controllers); computing
infrastructure maintenance (operators, analysts) and general site services.In
this paper, we'll show a different perspective, probably not so well-known,
presenting some INSA recent activities at the European Space Astronomy Centre
(ESAC) and NASA Madrid Deep Space Communication Complex (MDSCC) directly
related to scientific operations. Basic lines of activity involved include:
Operations support for science operations; system and software support for real
time systems; technical administration and IT support; R \& D activities,
radioastronomy (at MDSCC and ESAC) and scientific research projects. This paper
is structured as follows: first, INSA activities in two ESA cornerstone
astrophysics missions, XMM-Newton and Herschel, will be outlined. Then, our
activities related to Science infrastructure services, represented by the
Virtual Observatory (VO) framework and the Science Archives development
facilities are briefly shown. Radio Astronomy activities will be described
afterwards, and finally, a few research topics in which INSA scientists are
involved will be also described.Comment: 6 pages. Highlights of Spanish Astrophysics V Proceedings of the VIII
Scientific Meeting of the Spanish AstronomicalSociety (SEA) held in
Santander, 7-11 July, 200
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