Aspect and Modality in Indonesian the Case of Sudah, Telah, Pernah, and Sempat

In this paper, I describe four Indonesian aspect markers, sudah, telah, pernah, and sempat, showing that the main opposition between them relies not only on their aspectual meanings, but also on the various modalities they express. The opposition between the very frequent markers sudah and telah is analysed in detail. The syntactic and semantic survey shows that these two markers are not synonyms in most contexts

Aspect and Modality in Indonesian the Case of Sudah, Telah, Pernah, and Sempat

In this paper, I describe four Indonesian aspect markers, sudah, telah, pernah, and sempat, showing that the main opposition between them relies not only on their aspectual meanings, but also on the various modalities they express. The opposition between the very frequent markers sudah and telah is analysed in detail. The syntactic and semantic survey shows that these two markers are not synonyms in most contexts

The Indonesian Verbal Suffix –Nya; Nominalization or Subordination?

The suffix ‑nya is one of the most frequent and polysemic suffixes in Indonesian. It can provide definite determination and topicalization. The “Verb‑nya“, which often appears in a topicalized subject Noun Phrase (NP), is generally labelled as a deverbal noun. Nevertheless, many syntactic constraints set it apart from Indonesian deverbal nouns. “Verb‑nya“ must be complemented by a NP, which can easily be reconstructed as a former subject: a sentence is topicalized and thus becomes a noun clause, generally the subject of the main clause Verb Phrase (VP). I argue that “Verb‑nya“ is a subordinate noun clause, almost always conveying causality. This causal noun clause, an innovation in formal written Indonesian (especially in the media), seems to fill a “gap“: the impossibility of beginning a sentence with a subordinating morpheme (‘that', ‘because')

Applicability of Boussinesq approximation in a turbulent fluid with constant properties

The equations of motion describing buoyant fluids are often simplified using a set of approximations proposed by J. Boussinesq one century ago. To resume, they consist in assuming constant fluid properties, incompressibility and conservation of calories during heat transport. Assuming fulfilment of the first requirement (constant fluid properties), we derive a set of 4 criteria for assessing the validity of the two other requirements in turbulent Rayleigh-B\'enard convection. The first criterion $\alpha \Delta \ll 1$ simply results from the incompressibility condition in the thermal boundary layer ($\alpha$ and $\Delta$ are the thermal expansion coefficient and the temperature difference driving the flow). The 3 other criteria are proportional or quadratic with the density stratification or, equivalently with the temperature difference resulting from the adiabatic gradient across the cell $\Delta_{h}$. Numerical evaluations with air, water and cryogenic helium show that most laboratory experiments are free from such Boussinesq violation as long as the first criterion is fulfilled. In ultra high Rayleigh numbers ($Ra>10^{16}$) experiments in He, one of the stratification criteria, scaling with $\alpha \Delta_{h}$, could be violated. This criterion garanties that pressure fluctuations have a negligible influence both on the density variation and on the heat transfer equation through compression/expansion cycles. Extrapolation to higher $Ra$ suggests that strong violation of Boussinesq approximation could occur in atmospheric convection.Comment: Submitted to Phys.Fluids (oct 2007

Optimal Addition of Images for Detection and Photometry

In this paper we describe weighting techniques used for the optimal coaddition of CCD frames with differing characteristics. Optimal means maximum signal-to-noise (s/n) for stellar objects. We derive formulae for four applications: 1) object detection via matched filter, 2) object detection identical to DAOFIND, 3) aperture photometry, and 4) ALLSTAR profile-fitting photometry. We have included examples involving 21 frames for which either the sky brightness or image resolution varied by a factor of three. The gains in s/n were modest for most of the examples, except for DAOFIND detection with varying image resolution which exhibited a substantial s/n increase. Even though the only consideration was maximizing s/n, the image resolution was seen to improve for most of the variable resolution examples. Also discussed are empirical fits for the weighting and the availability of the program, WEIGHT, used to generate the weighting for the individual frames. Finally, we include appendices describing the effects of clipping algorithms and a scheme for star/galaxy and cosmic ray/star discrimination.Comment: 27 pages (uuencoded compressed postscript), 199

Cosmological Simulations Using Special Purpose Computers: Implementing P3M on Grape

An adaptation of the Particle-Particle/Particle-Mesh (P3M) code to the special purpose hardware GRAPE is presented. The short range force is calculated by a four chip GRAPE-3A board, while the rest of the calculation is performed on a Sun Sparc 10/51 workstation. The limited precision of the GRAPE hardware and algorithm constraints introduce stochastic errors of the order of a few percent in the gravitational forces. Tests of this new P3MG3A code show that it is a robust tool for cosmological simulations. The code currently achieves a peak efficiency of one third the speed of the vectorized P3M code on a Cray C-90 and significant improvements are planned in the near future. Special purpose computers like GRAPE are therefore an attractive alternative to supercomputers for numerical cosmology.Comment: 9 pages (ApJS style); uuencoded compressed PostScript file (371 kb) Also available by anonymous 'ftp' to astro.Princeton.EDU [128.112.24.45] in: summers/grape/p3mg3a.ps (668 kb) and WWW at: http://astro.Princeton.EDU/~library/prep.html (as POPe-600) Send all comments, questions, requests, etc. to: [email protected]

The Optimal Number of Charities

In this paper charity brings some joy of giving; it yields more contributions to public goods than standard "subscription", but its creation is costly. We compare the laissez-faire number of charities with both the second and the first-best level. In general, laissez-faire implies an underprovision of both charities and public goods.Charities, Public Good

New atmospheric parameters and spectral interpolator for the MILES cool stars

Context: The full spectrum fitting of stellar spectra against a library of empirical spectra is a well-established approach to measure the atmospheric parameters of FGK stars with a high internal consistency. Extending it towards cooler stars still remains a challenge. Aims: We address this question by improving the interpolator of the MILES (Medium-resolution INT Library of Empirical Spectra) library in the low effective temperature regime (Tefff < 4800 K), and we refine the determination of the parameters of the cool MILES stars. Methods: We use the ULySS package to determine the atmospheric parameters (Teff, logg and [Fe/H]), and measure the biases of the results with respect to our updated compilation of parameters calibrated against theoretical spectra. After correcting some systematic effects, we compute a new interpolator that we finally use to redetermine the atmospheric parameters homogeneously and assess the biases. Results: Based on an updated literature compilation, we determine Teff in a more accurate and unbiased manner compared to those determined with the original interpolator. The validity range is extended downwards to about Teff = 2900 K compared to 3500 K previously. The mean residual biases on Teff, logg, and [Fe/H], with respect to the literature compilation for the coolest stars (Teff <= 3800 K) computed using the new interpolator, are -15 K, -0.02 dex, and 0.02 dex respectively. The corresponding estimations of the external precision are 63 K, 0.23 dex, and 0.15 dex respectively. For the stars with Teff in the range 3800 - 4200 K, the determinations of Teff and [Fe/H] have been slightly improved. At higher temperatures, the new interpolator is comparable to the original one. The new version of the interpolator is publicly available.Comment: A&A Accepted, 30 pages, 10 figure

Trends in Income Inequality, Pro-Poor Income Growth and Income Mobility

We provide an analytical framework within which changes in income inequality over time are related to the pattern of income growth across the income range, and the reshuffling of individuals in the income pecking order. We use it to explain how it was possible both for 'the poor' to have fared badly relatively to 'the rich' in the USA during the 1980s (when income inequality grew substantially), and also for income growth to have been pro-poor. Income growth was also pro-poor in Western Germany, more so than in the USA, and inequality did not rise as much.inequality; income growth; income mobility; pro-poor growth; reranking