426,194 research outputs found
Utility Manning: Young Filipino Men, Servitude and the Moral Economy of Becoming a Seafarer and Attaining Adulthood
To get a job as a seafarer in the global maritime industry, thousands of male Filipino youths work for free as ‘utility men’ for manning agencies that supply seafarers to ship operators around the world. Based on ethnographic fieldwork and approached from a moral economy perspective, this article examines how manning agencies and utility men differentially rationalize this exploitative work (utility manning). Manning agencies use it as a technology of servitude that, through physical and verbal abuse and other techniques, enforces docility to prepare utility men for the harsher conditions on-board a ship. In contrast, utility men use it as a technology of imagination, gleaning from it a capacity to shape their future. Faced with few social possibilities in the Philippines, they deploy servitude as a strategy for attaining economic mobility and male adulthood
Utility Manning: Young Filipino Men, Servitude and the Moral Economy of Becoming a Seafarer and Attaining Adulthood
To get a job as a seafarer in the global maritime industry, thousands of male Filipino youths work for free as ‘utility men’ for manning agencies that supply seafarers to ship operators around the world. Based on ethnographic fieldwork and approached from a moral economy perspective, this article examines how manning agencies and utility men differentially rationalize this exploitative work (utility manning). Manning agencies use it as a technology of servitude that, through physical and verbal abuse and other techniques, enforces docility to prepare utility men for the harsher conditions on-board a ship. In contrast, utility men use it as a technology of imagination, gleaning from it a capacity to shape their future. Faced with few social possibilities in the Philippines, they deploy servitude as a strategy for attaining economic mobility and male adulthood
KOPE /Kalendar Oriented Program Efforts/ provides data for management decisions
KOPE /Kalendar Oriented Program Efforts/ is a computer program that establishes control over project efforts to assure management of meeting a specified completion date. With the appropriate input data, KOPE computes the starting and completion dates, the manning level for each activity, and the composite manning level for the program
Attraction and unbinding of like-charged rods
We investigate the effective interaction between two like-charged rods in the
regime of large electrostatic coupling parameters using both Molecular Dynamics
simulation techniques and the recently introduced strong-coupling theory. We
obtain attraction between the rods for elevated Manning parameters accompanied
by an equilibrium surface-to-surface separation of the order of the
Gouy-Chapman length. A continuous unbinding between the rods is predicted at a
threshold Manning parameter of 2/3.Comment: 8 pages, 2 figure
Attraction of like-charged macroions in the strong-coupling limit
Like-charged macroions attract each other as a result of strong electrostatic
correlations in the presence of multivalent counterions or at low temperatures.
We investigate the effective electrostatic interaction between i) two
like-charged rods and ii) two like-charged spheres using the recently
introduced strong-coupling theory, which becomes asymptotically exact in the
limit of large coupling parameter (i.e. for large counterion valency, low
temperature, or high surface charge density on macroions). Since we deal with
curved surfaces, an additional parameter, referred to as Manning parameter, is
introduced, which measures the ratio between the radius of curvature of
macroions to the Gouy-Chapman length and controls the counterion-condensation
process that directly affects the effective interactions. For sufficiently
large Manning parameters (weakly-curved surfaces), we find a strong long-ranged
attraction between two macroions that form a closely-packed bound state with
small surface-to-surface separation of the order of the counterion diameter in
agreement with recent simulations. For small Manning parameters (highly-curved
surfaces), on the other hand, the equilibrium separation increases and the
macroions unbind from each other as the confinement volume increases to
infinity. This occurs via a continuous universal unbinding transition for two
charged rods at a threshold Manning parameter of 2/3, while the transition is
discontinuous for spheres because of a pronounced potential barrier at
intermediate distances.Comment: 16 pages, 10 figure
Analytical solutions of the Klein-Fock-Gordon equation with the Manning-Rosen potential plus a Ring-Shaped like potential
In this work, on the condition that scalar potential is equal to vector
potential, the bound state solutions of the Klein-Fock-Gordon equation of the
Manning-Rosen plus ring-shaped like potential are obtained by Nikiforov-Uvarov
method. The energy levels are worked out and the corresponding normalized
eigenfunctions are obtained in terms of orthogonal polynomials for arbitrary
states. The conclusion also contain central Manning-Rosen, central and
non-central Hulth\'en potential.Comment: 14 pages. arXiv admin note: substantial text overlap with
arXiv:1210.537
Manning condensation in two dimensions
We consider a macroion confined to a cylindrical cell and neutralized by
oppositely charged counterions. Exact results are obtained for the
two-dimensional version of this problem, in which ion-ion and ion-macroion
interactions are logarithmic. In particular, the threshold for counterion
condensation is found to be the same as predicted by mean-field theory. With
further increase of the macroion charge, a series of single-ion condensation
transitions takes place. Our analytical results are expected to be exact in the
vicinity of these transitions and are in very good agreement with recent
Monte-Carlo simulation data.Comment: 4 pages, 4 figure
Kosterlitz-Thouless and Manning Condensation
A comparison between the Kosterlitz-Thouless theory of metal insulator
transition in a two dimensional plasma and a counterion condensation in a
polyelectrolyte solution is made. It is demonstrated that, unlike some of the
recent suggestions, the counterion condensation and the Kosterlitz-Thouless
transition are distinct.Comment: 3 pages, uses multicol.sty, accepted to Physica
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