231 research outputs found
Beyond "causes of causes": Health, stigma and the settler colonial urban territory in the Negev\Naqab
This article critically analyses and theoretically conceptualises the links between settler colonialism, planning and health. Based on the case of the Bedouin community in the Negev\Naqab, we argue that the production of settler colonial space has a profound impact on health, and should therefore be referred to as a specific category for analysing health disparities, simultaneously entangling territorial control and biopolitics towards indigenous communities. Furthermore, we suggest that this relationship between space and health constructs stigma that justifies and facilitates – in turn – the ongoing territorial control over the indigenous Bedouin population in Israel. By reviewing existing data on health and planning, especially in relation to infrastructure and access to services, we contribute to the growing literature on the nexus of settler-colonialism\health with urban and regional planning. Importantly, throughout this paper we refer to the Bedouin localities as part of the production of urban territory, illuminating the urban as a multidimensional process of political struggle, including the metropolin informal fringes
Neo-settler colonialism and the re-formation of territory: Privatization and nationalization in Israel
In this article we critically analyse the production of Israeli territory vis a vis the ongoing transformation of land and planning policies from ones based on pure nationalism to those purporting neo-liberal logic. Unlike the existing literature − including the most recent critical body of knowledge on planning, resource management and public policy in Israel − we contend that this transformation must be understood within the framework of settler colonialism. Our main argument is that the growing dominance of neo-liberal policies, expressed in the form of new public management, privatization of space, planning and territorial management, is bound up with Israel’s settler-colonial politics. Based on our detailed study of the dynamics of the privatization of space in Israel, we conceptualize the interplay between centralistic-national territorial management and new public management, free market-driven, privatization-prone, liberal planning and land policies as neo-settler colonialism. This concept focuses on the symbiotic relationships between these two vectors, with the latter providing a new mechanism of colonial control
Modeling Algae Self-Replenishment
This paper presents a sunlight-dependent algae growth model. Driven by the circumstances surrounding Lake Chapala, Mexico, this theoretical model is an endeavor to understand the resilient sustainability of algae that threatens the area’s ecosystem. In this paper, free-floating algae (phytoplankton) are treated as two distinct populations according to their location in the body of water: the vibrant sunlit upper region and the stagnate lower region where photosynthesis is not possible. The numerical solution for the model is analyzed and results are discussed in light of previous studies and the state of Lake Chapala
Resonant multiple Andreev reflections in mesoscopic superconducting junctions
We investigate the properties of subharmonic gap structure (SGS) in
superconducting quantum contacts with normal-electron resonances. We find two
distinct new features of the SGS in resonant junctions which distinguish them
from non-resonant point contacts: (i) The odd-order structures on the
current-voltage characteristics of resonant junctions are strongly enhanced and
have pronounced peaks, while the even-order structures are suppressed, in the
case of a normal electron resonance being close to the Fermi level. (ii)
Tremendous current peaks develop at where indicates a
distance of the resonance to the Fermi level. These properties are determined
by the effect of narrowing of the resonance during multiple Andreev reflections
and by overlap of electron and hole resonances.Comment: 13 pages, 10 figure
Bias and temperature dependence of the 0.7 conductance anomaly in Quantum Point Contacts
The 0.7 (2e^2/h) conductance anomaly is studied in strongly confined, etched
GaAs/GaAlAs quantum point contacts, by measuring the differential conductance
as a function of source-drain and gate bias as well as a function of
temperature. We investigate in detail how, for a given gate voltage, the
differential conductance depends on the finite bias voltage and find a
so-called self-gating effect, which we correct for. The 0.7 anomaly at zero
bias is found to evolve smoothly into a conductance plateau at 0.85 (2e^2/h) at
finite bias. Varying the gate voltage the transition between the 1.0 and the
0.85 (2e^2/h) plateaus occurs for definite bias voltages, which defines a gate
voltage dependent energy difference . This energy difference is
compared with the activation temperature T_a extracted from the experimentally
observed activated behavior of the 0.7 anomaly at low bias. We find \Delta =
k_B T_a which lends support to the idea that the conductance anomaly is due to
transmission through two conduction channels, of which the one with its subband
edge \Delta below the chemical potential becomes thermally depopulated as the
temperature is increased.Comment: 9 pages (RevTex) with 9 figures (some in low resolution
Kondo resonance effect on persistent currents through a quantum dot in a mesoscopic ring
The persistent current through a quantum dot inserted in a mesoscopic ring of
length L is studied. A cluster representing the dot and its vicinity is exactly
diagonalized and embedded into the rest of the ring. The Kondo resonance
provides a new channel for the current to flow. It is shown that due to scaling
properties, the persistent current at the Kondo regime is enhanced relative to
the current flowing either when the dot is at resonance or along a perfect ring
of same length. In the Kondo regime the current scales as , unlike
the scaling of a perfect ring. We discuss the possibility of detection
of the Kondo effect by means of a persistent current measurement.Comment: 11 pages, 3 Postscript figure
Is there a d.c. Josephson Effect in Bilayer Quantum Hall Systems?
We argue on the basis of phenomenological and microscopic considerations that
there is no d.c. Josephson effect in ordered bilayer quantum Hall systems, even
at T=0. Instead the tunnel conductance is strongly enhanced, approaching a
finite value proportional to the square of the order parameter as the
interlayer tunneling amplitude vanishes.Comment: 5 pages, 2 figure
Interacting fermions in self-similar potentials
We consider interacting spinless fermions in one dimension embedded in
self-similar quasiperiodic potentials. We examine generalizations of the
Fibonacci potential known as precious mean potentials. Using a bosonization
technique and a renormalization group analysis, we study the low-energy physics
of the system. We show that it undergoes a metal-insulator transition for any
filling factor, with a critical interaction that strongly depends on the
position of the Fermi level in the Fourier spectrum of the potential. For some
positions of the Fermi level the metal-insulator transition occurs at the non
interacting point. The repulsive side is an insulator with a gapped spectrum
whereas in the attractive side the spectrum is gapless and the properties of
the system are described by a Luttinger liquid. We compute the transport
properties and give the characteristic exponents associated to the frequency
and temperature dependence of the conductivity.Comment: 18 pages, 10 EPS figure
The Effect of Fluorine Doping on the Characteristic Behaviour of CdTe
Fluorine which is an n-type dopant of cadmium telluride thin films was included during growth from a cadmium nitrate [Cd(NO3)2Æ4H2O] bath using an electrodeposition technique. The fluorine concentration in the Cd(NO3)2Æ4H2O
baths were varied between 0.5 ppm and 50 ppm in order to determine its effect on the optical, structural, morphological and electrical properties of the
as-deposited and the post-growth-treated layers. These characterisations were carried out using x-ray diffraction, ultraviolet–visible spectrophotometry, scanning electron microscopy, energy dispersive x-rays spectroscopy, photoelectrochemical cell measurement, direct current conductivity measurement and fully fabricated device characterisation. The results are systematically
reported in this paper
Simple model to explain effects of plasma protein binding and tissue binding on calculated volumes of distribution, apparent elimination rate constants and clearances
A simple pharmacokinetic model, incorporating linear plasma protein binding, linear tissue binding, and first order elimination of free (unbound) drug, was studied. If Cl p is the plasma clearance, V f is the “true” volume of distribution of free drug, β is the apparent elimination rate constant, σ is the fraction of the drug which is free in plasma, f is the fraction of the drug which is free in the entire body, k f is the intrinsic elimination rate constant for free drug, and A TB o is the initial amount of drug which is bound to tissues, then the model indicates that the following relationships hold: (1) Cl p = V f σ k f ; (2) β = f k f ; and V dext = (σ/f) V f . Only σ, and not f, can be measured experimentally . Dividing Cl p by σ provides an estimate of the intrinsic clearance of free drug, V f k f . A plot of V dext versus σ has an intercept equal to V f , and the ratio of the slope/intercept is an estimate of A TB o /A f o , where A f o is the initial amount of free drug (equal to V f times initial concentration of free drug in plasma). Thus, an estimate of A TB o may be obtained. Dividing the intrinsic clearance by V f provides an estimate of k f . Thus, theoretically, estimates of V f , k f , A TB o and f may be obtained. The variables are not separated when β is plotted versus σ, and curvature of such plots is expected; no useful information is obtained from such plots.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/46634/1/228_2004_Article_BF00563079.pd
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