39,596 research outputs found
It's complicated: apprentice leaders on the edge of chaos
A view from the dance floor of ALICSE participants showed that the integrated children's services remain under pressure to become multi-dimensional with the rhetorical push to a joint working becoming increasingly complex and difficult to navigate. This was the view of a 360 degree questionnaire to a number of ALICSE participants and reflections from an in-depth dialogue. The main findings suggested collective professionalism requires collaborative relationships between organisations and individuals, and this collaboration poses the most significant challenge for educational leadership and management. The participants on the dance floor often reciting phrases like: letting go of control, no hierarchy, self-organising. The main conclusion being an individual needs to be self-organised and it takes a leader to be confident to manage ambiguity and complexity. Using complex adaptive systems theory and blended leadership styles theories, we will assert that distributional leadership is required to navigate the complex environment. Futures thinking suggests that we could use complex adaptive systems theory to help build an effective communication strategy for individuals, teams and services allowing them to self-organise
After the fall: globalizing the remnants of the Communist bloc
Globalization ; Europe, Eastern
Fields in Nonaffine Bundles. I. The general bitensorially covariant differentiation procedure
The standard covariant differentiation procedure for fields in vector bundles
is generalised so as to be applicable to fields in general nonaffine bundles in
which the fibres may have an arbitrary nonlinear structure. In addition to the
usual requirement that the base space should be flat or endowed with its own
linear connection, and that there should be an ordinary gauge connection on the
bundle, it is necessary to require also that there should be an intrinsic,
bundle-group invariant connection on the fibre space. The procedure is based on
the use of an appropriate primary-field (i.e. section) independent connector
that is constructed in terms of the natural fibre-tangent-vector realisation of
the gauge connection. The application to gauged harmonic mappings will be
described in a following article.Comment: 17 page Latex file with some minor misprint corrections and added
color for article originally published in black and whit
Computer program for the design of axial-flow turbines
Computer program, capable of analyzing single and multispool units, computes absolute and relative flow fields within the turbine at the first stator inlet, at each interblade row plane, and at the final rotor exit. No simplifying assumptions are made which would result in restrictive design
Techniques for studying gravity waves and turbulence: Horizontal, vertical and temporal resolution needed
One of the most important atmospheric measurements that is needed is a measure of the gravity-wave spectrum. The MST radar has been investigated as means to measure the temporal resolution required to determine gravity-wave oscillations. The required vertical and horizontal resolution is dependent on the particular part of the gravity wave spectrum that is analyzed. Horizontal spacing is also discussed
Design optimisation of multistage depressed collectors for high efficiency travelling wave tubes using genetic algorithm.
The design of a symmetric and an asymmetric collector has been optimised using the genetic algorithm. The improvement in collector efficiency in both cases is remarkable
Entrainment coefficient and effective mass for conduction neutrons in neutron star crust: II Macroscopic treatment
Phenomena such as pulsar frequency glitches are believed to be attributable
to differential rotation of a current of ``free'' superfluid neutrons at
densities above the ``drip'' threshold in the ionic crust of a neutron star.
Such relative flow is shown to be locally describable by adaption of a
canonical two fluid treatment that emphasizes the role of the momentum
covectors constructed by differentiation of action with respect to the
currents, with allowance for stratification whereby the ionic number current
may be conserved even when the ionic charge number Z is altered by beta
processes. It is demonstrated that the gauge freedom to make different choices
of the chemical basis determining which neutrons are counted as ``free'' does
not affect their ``superfluid'' momentum covector, which must locally have the
form of a gradient (though it does affect the ``normal'' momentum covector
characterising the protons and those neutrons that are considered to be
``confined'' in the nuclei). It is shown how the effect of ``entrainment''
(whereby the momentum directions deviate from those of the currents) is
controlled by the (gauge independent) mobility coefficient K, estimated in
recent microscopical quantum mechanical investigations, which suggest that the
corresponding (gauge dependent) ``effective mass'' m* of the free neutrons can
become very large in some layers. The relation between this treatment of the
crust layers and related work (using different definitions of ``effective
mass'') intended for the deeper core layers is discussed.Comment: 21 pages Latex. Part II of article whose Part I (Simple microscopic
models) is given by nucl-th/0402057. New version extended to include figure
Integrability and the Kerr-(A)dS black hole in five dimensions
In this note we prove that the Hamilton-Jacobi equation for a particle in the
five dimensional Kerr-(A)dS black hole is separable, for arbitrary rotation
parameters. As a result we find an irreducible Killing tensor. We also consider
the Klein-Gordon equation in this background and show that this is also
separable. Finally we comment on extensions and implications of these results.Comment: 4 pages, RevTeX. v2: minus sign typos in eq. (17) and (18) of
published version correcte
Transonic Elastic Model for Wiggly Goto-Nambu String
The hitherto controversial proposition that a ``wiggly" Goto-Nambu cosmic
string can be effectively represented by an elastic string model of exactly
transonic type (with energy density inversely proportional to its tension
) is shown to have a firm mathematical basis.Comment: 8 pages, plain TeX, no figure
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