The Development of Global Science.

How do we build research capacity throughout the world and capture the great human potential? To us, the answer is rather straightforward: the time-honored tradition of scientific mentoring must be practiced on a wider scale across borders. Herein, we detail the necessity for expanding mentorship to a global scale and provide several important principles to be considered when designing, planning, and implementing programs and centers of research around the world

The incidence of graft on developing-country firms

This paper measures the extent to which firms in developing countries are the target of bribes. Using new firm-level survey data from 33 African and Latin American countries, we first show that perceptions adjust slowly tofirms'experience with corrupt officials and hence are an imperfect proxy for the true incidence of graft. We then construct an experience-based index that reflects the probability that a firm will be asked for a bribe in order to complete a specified set of business transactions. On average, African firms are three times as likely to be asked for bribes as are firms in Latin America, although there is substantial variation within each region. Last, we show that graft appears to be more prevalent in countries with excessive regulation and where democracy is weak. In particular, our results suggest that the incidence of graft in Africa would fall by approximately 85 percent if countries in the region had levels of democracy and regulation similar to those that exist in Latin America.Public Sector Corruption&Anticorruption Measures,Corruption&Anitcorruption Law,Crime and Society,E-Business,Access to Finance

Troubleshooting Time-Dependent Density-Functional Theory for Photochemical Applications: Oxirane

The development of analytic-gradient methodology for excited states within conventional time-dependent density-functional theory (TDDFT) would seem to offer a relatively inexpensive alternative to better established quantum-chemical approaches for the modeling of photochemical reactions. However, even though TDDFT is formally exact, practical calculations involve the use of approximate functionals, in particular the TDDFT adiabatic approximation, whose use in photochemical applications must be further validated. Here, we investigate the prototypical case of the symmetric CC ring opening of oxirane. We demonstrate by direct comparison with the results of high-quality quantum Monte Carlo calculations that, far from being an approximation on TDDFT, the Tamm-Dancoff approximation (TDA) is a practical necessity for avoiding triplet instabilities and singlet near instabilities, thus helping maintain energetically reasonable excited-state potential energy surfaces during bond breaking. Other difficulties one would encounter in modeling oxirane photodynamics are pointed out but none of these is likely to prevent a qualitatively correct TDDFT/TDA description of photochemistry in this prototypical molecule.Comment: 19 pages, 17 figures, submitted to the Journal of Chemical Physic

First XMM-Newton observations of strongly magnetic cataclysmic variables - II. Timing studies of DP Leo and WW Hor

XMM-Newton was used to observe two eclipsing, magnetic cataclysmic variables, DP Leo and WW Hor, continuously for three orbital cycles each. Both systems were in an intermediate state of accretion. For WW Hor we also obtained optical light curves with the XMM-Newton Optical Monitor and from ground-based observations. Our analysis of the X-ray and optical light curves allows us to constrain physical and geometrical parameters of the accretion regions and derive orbital parameters and eclipse ephemerides of the systems. For WW Hor we directly measure horizontal and vertical temperature variations in the accretion column. From comparisons with previous observations we find that changes in the accretion spot longitude are correlated with the accretion rate. For DP Leo the shape of the hard X-ray light curve is not as expected for optically thin emission, showing the importance of optical depth effects in the post-shock region. We find that the spin period of the white dwarf is slightly shorter than the orbital period and that the orbital period is decreasing faster than expected for energy loss by gravitational radiation alone.Comment: Accepted for publication in MNRAS, 12 pages, 6 figure

Plaza de la Memoria Localidad de San Javier

50 p.El proyecto de título nace de la reflexión sobre los limites urbano-rurales de la ciudad y como estos se han ido convirtiendo muchas veces en basurales de la ciudad. La inquietud por el estudio de estos limites de ciudad fue el punto de partida de la búsquedad en esta problemática, ese interés apuntó a poner atención en la localidad de San Javier y en su problemática, de cómo llegaba a su limite con la rivera colindante de el Loncomilla. En la cual, era evidente su condición de límite ya que dividia ambos mundos tanto el río como la ciudad. La propuesta plantea la aparición de un borde entre ciudad y río (urbano-rural) un concepto más amable que conecte ambas situaciones. El "hacia una arquitectura de la integración de las partes" fue la mirada aplicada, una vez en el lugar, sumar elementos propios de lugar, que se fueron convirtiendo en los elementos de proyectación: una historia muy rica que encerraba dicho lugar, una escalera hecha por los vecinos para bajar al río, una defensa para las crecidas del río, las ruinas del antiguo puente loncomilla, paisaje, topografía. Con una idea de ser puestos en valor como un total

Perancangan Sistem Pengendalian Suhu Kumbung Jamur Dengan Logika Fuzzy

Penelitian ini difokuskan pada pengendalian suhu kumbung jamur tiram dengan kontrol fuzzy gain scheduling yang digunakan untuk mentuning Kp, Ki, dan Kd agar diperoleh respon yang terbaik untuk aktuator sprayer dan blower. Pemodelan matematis ARX untuk membuat fungsi pengendalian suhu terhadap kelembaban. Variabel input yang digunakan dalam kontrol logika fuzzy GS ini adalah nilai setpoint suhu dan error suhu. Hasil output dari kontrol logika fuzzy adalah nilai otomatis tuning dari Kp, Ki, Kd Dari hasil fitting data real plant dengan data estimasi dengan menggunakan pemodelan ARX, diperoleh angka 66, 69% dan 54,49% untuk hasil fitting data real plant dengan data validasi. Dilihat dari bentuk kurva yang diperoleh, terdapat kesamaan tren antara data real plant dengan data estimasi maupun validasi. Telah dilakukan uji open loop dan juga close pada sistem pengendalian yang dirancang. Pemberian nilai set point pada suhu yang sesuai untuk pertumbuhan jamur yaitu pada suhu 28° C dapat dicapai dan dipertahankan dengan nilai maximum overshoot dari pengendali tersebut sebesar 0.89% dan time settling sekitar 325 detik. Fungsi suhu terhadap kelembaban dengan pemodelan ARX menghasilkan respon sistem dengan maximum overshoot dari pengendali tersebut sebesar 35% dan time settling sekitar 240 detik, dan error steady state sebesar 0,03%

An XMM and Chandra view of massive clusters of galaxies to z=1

The X-ray properties of a sample of high redshift (z>0.6), massive clusters observed with XMM-Newton and Chandra are described, including two exceptional systems. One, at z=0.89, has an X-ray temperature of T=11.5 (+1.1, -0.9) keV (the highest temperature of any cluster known at z>0.6), an estimated mass of (1.4+/-0.2)x10^15 solar masses and appears relaxed. The other, at z=0.83, has at least three sub-clumps, probably in the process of merging, and may also show signs of faint filamentary structure at large radii,observed in X-rays. In general there is a mix of X-ray morphologies, from those clusters which appear relaxed and containing little substructure to some highly non-virialized and probably merging systems. The X-ray gas metallicities and gas mass fractions of the relaxed systems are similar to those of low redshift clusters of the same temperature, suggesting that the gas was in place, and containing its metals, by z=0.8. The evolution of the mass-temperature relation may be consistent with no evolution or with the ``late formation'' assumption. The effect of point source contamination in the ROSAT survey from which these clusters were selected is estimated, and the implications for the ROSAT X-ray luminosity function discussed.Comment: 9 pages, in Carnegie Observatories Astrophysics Series, Vol. 3: Clusters of Galaxies: Probes of Cosmological Structure and Galaxy Evolution, ed. J. S. Mulchaey, A. Dressler, and A. Oemler. See http://www.ociw.edu/ociw/symposia/series/symposium3/proceedings.html for a full-resolution versio

Contamination of Cd and Pb on Milkfish Chanos Chanos Cultured in Seribu Islands, Jakarta

Seribu Islands located in the north of Jakarta Bay; it is potentially polluted by heavy metal such as Cd and Pb. The aims of this study is to prove contamination presumption, by analyzing and determine correlation Cd and Pb concentration in the sediment, in the water and on milkfish Chanos chanos cultured in this area. On this study, we collected water quality data (pH, temperature, dissolve oxygen and salinity) and heavy metals contamination (Cd and Pb) in the sediment, in the water and on milkfish. We compare collected data with quality standar and correlate heavy metal concentration between in the water and in the sediment; in the water and on milkfish organ; and, in the sediment and on milkfish organ. In general, water quality is sufficient enough to support the life of farmed milkfish. Cd and Pb contamination level in the water lied below the quality standard of Ministry of Environment decree No. 51/2004 in the last April and July. However, the contamination exceeds the standard in the last October. The contamination in sediment lied below RNO (1981), EPA (1999) and IACD/CEDA (1997). Gills, viscera and the meat of the milkfish are contaminated with Cd and Pb, yet, still lied below the quality standard of Ministry of Environment Decree No. 51/2004. The results showed that farmed milkfish in Thousand Islands are safe to eat. We also found that the correlation of Cd and Pb contamination between water and sediment is positive. The correlation of Cd is much higher than Pb. The correlation of Cd between water and viscera as well as between sediment and viscera are the most closely related than any other organ