Colonial and Postcolonial Histories: comparative reflections on the legacies of empire

human development, culture

IDeF-X ASIC for Cd(Zn)Te spectro-imaging systems

Joint progresses in Cd(Zn)Te detectors, microelectronics and interconnection technologies open the way for a new generation of instruments for physics and astrophysics applications in the energy range from 1 to 1000 keV. Even working between -20 and 20 degrees Celsius, these instruments will offer high spatial resolution (pixel size ranging from 300 x 300 square micrometers to few square millimeters), high spectral response and high detection efficiency. To reach these goals, reliable, highly integrated, low noise and low power consumption electronics is mandatory. Our group is currently developing a new ASIC detector front-end named IDeF-X, for modular spectro-imaging system based on the use of Cd(Zn)Te detectors. We present here the first version of IDeF-X which consists in a set of ten low noise charge sensitive preamplifiers (CSA). It has been processed with the standard AMS 0.35 micrometer CMOS technology. The CSA are designed to be DC coupled to detectors having a low dark current at room temperature. The various preamps implemented are optimized for detector capacitances ranging from 0.5 up to 30 pF.Comment: 8 pages, 11 figures, IEEE NSS-MIC conference in Rome 2004, submitted to IEEE TNS, correction in unit of figure

Experimental library screening demonstrates the successful application of computational protein design to large structural ensembles

The stability, activity, and solubility of a protein sequence are determined by a delicate balance of molecular interactions in a variety of conformational states. Even so, most computational protein design methods model sequences in the context of a single native conformation. Simulations that model the native state as an ensemble have been mostly neglected due to the lack of sufficiently powerful optimization algorithms for multistate design. Here, we have applied our multistate design algorithm to study the potential utility of various forms of input structural data for design. To facilitate a more thorough analysis, we developed new methods for the design and high-throughput stability determination of combinatorial mutation libraries based on protein design calculations. The application of these methods to the core design of a small model system produced many variants with improved thermodynamic stability and showed that multistate design methods can be readily applied to large structural ensembles. We found that exhaustive screening of our designed libraries helped to clarify several sources of simulation error that would have otherwise been difficult to ascertain. Interestingly, the lack of correlation between our simulated and experimentally measured stability values shows clearly that a design procedure need not reproduce experimental data exactly to achieve success. This surprising result suggests potentially fruitful directions for the improvement of computational protein design technology

Transport Through Andreev Bound States in a Graphene Quantum Dot

Andreev reflection-where an electron in a normal metal backscatters off a superconductor into a hole-forms the basis of low energy transport through superconducting junctions. Andreev reflection in confined regions gives rise to discrete Andreev bound states (ABS), which can carry a supercurrent and have recently been proposed as the basis of qubits [1-3]. Although signatures of Andreev reflection and bound states in conductance have been widely reported [4], it has been difficult to directly probe individual ABS. Here, we report transport measurements of sharp, gate-tunable ABS formed in a superconductor-quantum dot (QD)-normal system, which incorporates graphene. The QD exists in the graphene under the superconducting contact, due to a work-function mismatch [5, 6]. The ABS form when the discrete QD levels are proximity coupled to the superconducting contact. Due to the low density of states of graphene and the sensitivity of the QD levels to an applied gate voltage, the ABS spectra are narrow, can be tuned to zero energy via gate voltage, and show a striking pattern in transport measurements.Comment: 25 Pages, included SO

The Invention of Caste: Civil Society in Colonial India

Also CSST Working Paper #11.http://deepblue.lib.umich.edu/bitstream/2027.42/51136/1/368.pd

Ritual and Resistance: Subversion as a Social Fact

Also CSST Working Paper #16.http://deepblue.lib.umich.edu/bitstream/2027.42/51143/1/375.pd

The Original Caste: Power, History, and Hierarchy in South Asia

Also CSST Working Paper #10.http://deepblue.lib.umich.edu/bitstream/2027.42/51135/1/367.pd

The pasts of a Pālaiyakārar : the ethnohistory of a south Indian little king

This paper examines a text which is the family history of a line of south Indian "little kings," or pālaiyakārars. Beginning with a discussion of different modes of history, I analyze this text as both a statement of a particular history and a cultural representation of a more general modality of history. As a particular history, this text enables me to talk about conceptions of royal appropriateness and sovereignty, of political relations, and of kingly privileges; as a cultural form the text provides clues about the relations of these cultural conceptions to a structural form of narrative emplotment with all its underlying assumptions about time, causation, and process. Finally, I consider how a hermeneutical exercise of this sort is very important for Western analysts who wish to reconstruct the "history" of south Indian politics

From little king to landlord: property, law and the gift under permanent settlement

This paper concerns the set of issues surrounding the imposition in south India of a Permanent Settlement in 1803 for the local "nobility" -- the "ancient zamindars and polygars." I focus here on the "little kings" themselves, their transformation into "landlords", and the implications of the new political economy for the old political logic in which law, property, and the state were linked in very different ways. I look in particular at the problems concerning "alienation" under the Permanent Settlement, the fact that landlords, in contravention of the principles of profit and management, continued to make gifts of land. I conclude by examining the implications of my narratives for a consideration of colonial state and society, with respect in particular to the praxis of culture and the discourse of law. I demonstrate that all colonial transformations were, for inherent structural reasons, incompletely realized

Vortex dynamics in layered superconductors with correlated defects: influence of interlayer coupling

We report a detailed study of the vortex dynamics and vortex phase diagrams of two amorphous Ta_0.3Ge_0.7/Ge multilayered films with intrinsic coplanar defects, but different interlayer coupling. A pinned Bose-glass phase in the more weakly coupled sample exists only below a cross-over field H* in striking contrast to the strongly coupled film. Above H* the flux lines are thought to break up into pancake vortices and the cross-over field is significantly increased when the field is aligned along the extended defects. The two films show different vortex creep excitations in the Bose-glass phase.Comment: zip file: 1 RevTex, 5 figures (png