1,459 research outputs found
Les villages tanzaniens ujamaa 40 ans plus tard : Moralisation et commémoration du collectivisme
Entre 1967 et 1977, quelque 10 millions de Tanzaniens ont Ă©tĂ© dĂ©placĂ©s de leur terre affermĂ©e et regroupĂ©s dans des villages ujamaa (littĂ©ralement, familyhood) bĂątis par suite dâune dĂ©cision gouvernementale, donnant lieu ainsi Ă lâun des plus vastes programmes de rĂ©installation de lâhistoire. Le prĂ©sident Julius Nyerere, « pĂšre » et philosophe du socialisme tanzanien, a justifiĂ© la villagisation en allĂ©guant quâelle permettrait dâamĂ©liorer la prestation de services de base Ă la population, tels que des cliniques mĂ©dicales, des Ă©coles et de lâeau potable. Or, dans la foulĂ©e de lâabandon progressif du programme et du discours socialistes au milieu des annĂ©es 1980, le sort de ces villages demeure dans une large mesure inconnu. Comment les villageois Ă©valuent-ils de nos jours la vie dans ces villages comparativement Ă ce quâelle Ă©tait Ă lâĂ©poque socialiste? Quels Ă©lĂ©ments de la coopĂ©ration communale, sâil sâavĂšre que celleâci a vĂ©ritablement existĂ©, ont Ă©tĂ© maintenus? Cet article fait Ă©tat dâune enquĂȘte rĂ©alisĂ©e auprĂšs de rĂ©sidants dâanciens villages ujamaa de la rĂ©gion de Mwanza. Leurs tĂ©moignages apportent certaines rĂ©ponses Ă ces questions et sont mis en contexte dans une plus vaste analyse de la politique agricole tanzanienne sous les rĂ©gimes socialiste et postsocialiste.Between 1967 and 1977, some 10 million Tanzanians were moved from scattered individual holdings into government mandated Ujamaa (literally, âfamilyhoodâ) villages in one of the largest resettlement movements in history. President Julius Nyerere, âfatherâ and philosopher of Tanzanian socialism, justified villagization on the grounds of being better able to provide basic services, such as medical clinics, schools, and clean water, to the citizenry. Yet in the wake of the quiet abandonment of socialist policy and rhetoric in the mid-1980s, the fate of these villages remains largely unknown. How do villagers evaluate life in these villages now as compared to socialist times? Have any elements of communal cooperation that may have existed been retained? In this paper, interviewed with residents in former Ujamaa villages in Mwanza Region provide some answers to these questions and are contextualized within a broader analysis of agricultural policy in socialist and postsocialist Tanzania.Entre 1967 y 1977, cerca de 10 millones de tanzano fueron desplazados de las tierras que rentaban y reagrupados en pueblos ujamaa (literalmente, lotes familiares) construidos por designio gubernamental, justificando asĂ uno de los mĂĄs vastos programas de re-localizaciĂłn de la historia. El presidente Julios Nyerere «padre» y filĂłsofo del socialismo tanzano, habĂa justificado la creaciĂłn de esos pueblos argumentando que eso permitirĂa mejorar la prestaciĂłn de servicios de base a la poblaciĂłn, tal y como las clĂnicas mĂ©dicas, las escuelas y el agua potable. Ahora bien, con el abandono progresivo del programa y del discurso socialista a mediados de los años 1980, aun se ignora cual serĂĄ el destino de dichos pueblos. ÂżCĂłmo sus habitantes evalĂșan actualmente la vida en esos pueblos comparada con lo que vivĂan durante la Ă©poca socialista? ÂżCuĂĄles son los elementos de la cooperaciĂłn comunal, si realmente existiĂł, que han perdurado? Este artĂculo reporta una investigaciĂłn realizada entre los residentes de los antiguos pueblos ujamaa de la regiĂłn de Mwanza. Sus afirmaciones permiten dilucidar ciertas cuestiones y han sido contextualizadas en el cuadro de un anĂĄlisis mĂĄs vasto de la polĂtica agrĂcola tanzana bajo los regĂmenes socialistas y post-socialistas
Search for New Physics with Jets and Missing Transverse Momentum in pp collisions at sqrt(s) = 7 TeV
A search for new physics is presented based on an event signature of at least
three jets accompanied by large missing transverse momentum, using a data
sample corresponding to an integrated luminosity of 36 inverse picobarns
collected in proton--proton collisions at sqrt(s)=7 TeV with the CMS detector
at the LHC. No excess of events is observed above the expected standard model
backgrounds, which are all estimated from the data. Exclusion limits are
presented for the constrained minimal supersymmetric extension of the standard
model. Cross section limits are also presented using simplified models with new
particles decaying to an undetected particle and one or two jets
X-ray emission from the Sombrero galaxy: discrete sources
We present a study of discrete X-ray sources in and around the
bulge-dominated, massive Sa galaxy, Sombrero (M104), based on new and archival
Chandra observations with a total exposure of ~200 ks. With a detection limit
of L_X = 1E37 erg/s and a field of view covering a galactocentric radius of ~30
kpc (11.5 arcminute), 383 sources are detected. Cross-correlation with Spitler
et al.'s catalogue of Sombrero globular clusters (GCs) identified from HST/ACS
observations reveals 41 X-rays sources in GCs, presumably low-mass X-ray
binaries (LMXBs). We quantify the differential luminosity functions (LFs) for
both the detected GC and field LMXBs, whose power-low indices (~1.1 for the
GC-LF and ~1.6 for field-LF) are consistent with previous studies for
elliptical galaxies. With precise sky positions of the GCs without a detected
X-ray source, we further quantify, through a fluctuation analysis, the GC LF at
fainter luminosities down to 1E35 erg/s. The derived index rules out a
faint-end slope flatter than 1.1 at a 2 sigma significance, contrary to recent
findings in several elliptical galaxies and the bulge of M31. On the other
hand, the 2-6 keV unresolved emission places a tight constraint on the field
LF, implying a flattened index of ~1.0 below 1E37 erg/s. We also detect 101
sources in the halo of Sombrero. The presence of these sources cannot be
interpreted as galactic LMXBs whose spatial distribution empirically follows
the starlight. Their number is also higher than the expected number of cosmic
AGNs (52+/-11 [1 sigma]) whose surface density is constrained by deep X-ray
surveys. We suggest that either the cosmic X-ray background is unusually high
in the direction of Sombrero, or a distinct population of X-ray sources is
present in the halo of Sombrero.Comment: 11 figures, 5 tables, ApJ in pres
Performance of the CMS Cathode Strip Chambers with Cosmic Rays
The Cathode Strip Chambers (CSCs) constitute the primary muon tracking device
in the CMS endcaps. Their performance has been evaluated using data taken
during a cosmic ray run in fall 2008. Measured noise levels are low, with the
number of noisy channels well below 1%. Coordinate resolution was measured for
all types of chambers, and fall in the range 47 microns to 243 microns. The
efficiencies for local charged track triggers, for hit and for segments
reconstruction were measured, and are above 99%. The timing resolution per
layer is approximately 5 ns
Measurement of the Forward-Backward Asymmetry in the B -> K(*) mu+ mu- Decay and First Observation of the Bs -> phi mu+ mu- Decay
We reconstruct the rare decays , , and in a data sample
corresponding to collected in collisions at
by the CDF II detector at the Fermilab Tevatron
Collider. Using and decays we report the branching ratios. In addition, we report
the measurement of the differential branching ratio and the muon
forward-backward asymmetry in the and decay modes, and the
longitudinal polarization in the decay mode with respect to the squared
dimuon mass. These are consistent with the theoretical prediction from the
standard model, and most recent determinations from other experiments and of
comparable accuracy. We also report the first observation of the {\mathcal{B}}(B^0_s \to
\phi\mu^+\mu^-) = [1.44 \pm 0.33 \pm 0.46] \times 10^{-6}27 \pm 6B^0_s$ decay observed.Comment: 7 pages, 2 figures, 3 tables. Submitted to Phys. Rev. Let
Measurements of the properties of Lambda_c(2595), Lambda_c(2625), Sigma_c(2455), and Sigma_c(2520) baryons
We report measurements of the resonance properties of Lambda_c(2595)+ and
Lambda_c(2625)+ baryons in their decays to Lambda_c+ pi+ pi- as well as
Sigma_c(2455)++,0 and Sigma_c(2520)++,0 baryons in their decays to Lambda_c+
pi+/- final states. These measurements are performed using data corresponding
to 5.2/fb of integrated luminosity from ppbar collisions at sqrt(s) = 1.96 TeV,
collected with the CDF II detector at the Fermilab Tevatron. Exploiting the
largest available charmed baryon sample, we measure masses and decay widths
with uncertainties comparable to the world averages for Sigma_c states, and
significantly smaller uncertainties than the world averages for excited
Lambda_c+ states.Comment: added one reference and one table, changed order of figures, 17
pages, 15 figure
Search for a New Heavy Gauge Boson Wprime with Electron + missing ET Event Signature in ppbar collisions at sqrt(s)=1.96 TeV
We present a search for a new heavy charged vector boson decaying
to an electron-neutrino pair in collisions at a center-of-mass
energy of 1.96\unit{TeV}. The data were collected with the CDF II detector
and correspond to an integrated luminosity of 5.3\unit{fb}^{-1}. No
significant excess above the standard model expectation is observed and we set
upper limits on . Assuming standard
model couplings to fermions and the neutrino from the boson decay to
be light, we exclude a boson with mass less than
1.12\unit{TeV/}c^2 at the 95\unit{%} confidence level.Comment: 7 pages, 2 figures Submitted to PR
Performance and Operation of the CMS Electromagnetic Calorimeter
The operation and general performance of the CMS electromagnetic calorimeter
using cosmic-ray muons are described. These muons were recorded after the
closure of the CMS detector in late 2008. The calorimeter is made of lead
tungstate crystals and the overall status of the 75848 channels corresponding
to the barrel and endcap detectors is reported. The stability of crucial
operational parameters, such as high voltage, temperature and electronic noise,
is summarised and the performance of the light monitoring system is presented
From 'One Namibia, One Nation' towards 'Unity in Diversity? Shifting representations of culture and nationhood in Namibian Independence Day celebrations, 1990-2010
In 2010 Namibia celebrated its twentieth anniversary of independence from South African rule. The main celebrations in the
countryâs capital Windhoek became the stage for an impressively orchestrated demonstration of maturing nationhood,
symbolically embracing postcolonial policy concepts such as ânational reconciliationâ, âunityâ and âdiversityâ. At the same time,
nation building in post-apartheid Namibia is characterised by a high degree of social and political fragmentation that manifests
itself in cultural and/or ethnic discourses of belonging. Taking the highly significant independence jubilee as our vantage point,
we map out a shift of cultural representations of the nation in Independence Day celebrations since 1990, embodied by the two
prominent slogans of âOne Namibia, one Nationâ and âUnity in Diversityâ. As we will argue, the difficult and at times highly
fragile postcolonial disposition made it necessary for the SWAPO government, as primary nation builder, to accommodate the
demands of regions and local communities in its policy frameworks. This negotiation of local identifications and national
belonging in turn shaped, and continues to shape, the performative dimension of Independence Day celebrations in Namibia.Web of Scienc
Portrait of Candida albicans Adherence Regulators
Cell-substrate adherence is a fundamental property of microorganisms that enables them to exist in biofilms. Our study focuses on adherence of the fungal pathogen Candida albicans to one substrate, silicone, that is relevant to device-associated infection. We conducted a mutant screen with a quantitative flow-cell assay to identify thirty transcription factors that are required for adherence. We then combined nanoString gene expression profiling with functional analysis to elucidate relationships among these transcription factors, with two major goals: to extend our understanding of transcription factors previously known to govern adherence or biofilm formation, and to gain insight into the many transcription factors we identified that were relatively uncharacterized, particularly in the context of adherence or cell surface biogenesis. With regard to the first goal, we have discovered a role for biofilm regulator Bcr1 in adherence, and found that biofilm regulator Ace2 is a major functional target of chromatin remodeling factor Snf5. In addition, Bcr1 and Ace2 share several target genes, pointing to a new connection between them. With regard to the second goal, our findings reveal existence of a large regulatory network that connects eleven adherence regulators, the zinc-response regulator Zap1, and approximately one quarter of the predicted cell surface protein genes in this organism. This limited yet sensitive glimpse of mutant gene expression changes had thus defined one of the broadest cell surface regulatory networks in C. albicans
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