A “friend finder” is a Location Based Service (LBS) that informs users about the presence of participants in a geographical area. In particular, one of the functionalities of this kind of application, reveals the users that are in proximity. Several implementations of the friend finder service already exist but, to the best of our knowledge, none of them provides a satisfactory technique to pro...

In recent years a lot of attention has been paid to geographic latitude and its relationship with key variables like economic growth, development, and institutional quality. In this paper we show that longitude (time zones) also matters. Using bilateral Foreign Direct Investment (FDI) data and gravity model estimations, we find that time zones have a significant impact on the location of FDI. F...

NoAA-AvHRn level 1b data have been widely used for environmental rcsearch at rcgional and global scales' There are, however, problems in preprocessing level 1b tape data in small sysiems, including a general lack of avnna-spectfc softwaie possessing suitable levels of sophistication, efficiency, and geographic covercge. This paper desctibes a onestep preprocessing algorithm which combines simpl...

[1] New observations obtained by the satellite CHAMP reveal a detailed picture of the noon-time equatorial electrojet (EEJ). The low orbit of CHAMP and its high-precision magnetometers reveal the spatial structure of the EEJ with unprecedented accuracy. Data from more than two and a half years have been used to investigate average features and also the global characteristics of the EEJ. Rather ...

A survey is presented of the galactic plane in the J = 1 − 0 transition of CO. About 73,000 spectra were obtained with the 7 m telescope at Bell Laboratories over a ten-year period. The coverage of the survey is (l, b) = (−5◦ to 117◦,−1◦ to +1), or 244 square degrees, with a grid spacing of 3 for |b| < 0.5, and a grid spacing of 6 for |b| > 0.5. The data presented here have been resampled onto ...

Observations of radar speckle patterns tied to the rotation of Mercury establish that the planet occupies a Cassini state with obliquity of 2.11 +/- 0.1 arc minutes. The measurements show that the planet exhibits librations in longitude that are forced at the 88-day orbital period, as predicted by theory. The large amplitude of the oscillations, 35.8 +/- 2 arc seconds, together with the Mariner...

It is of great important to study pulsar beam shapes if we are concerned with emission theories and pulsar birth rate. Both observations[9, 16] and/or the ICS model[10] show that different emission components are emitted from different heights. The relative longitude phase shifts due to different heights of emission components and to the toroidal velocity of electron are considered in this pape...

We have analyzed the origin of cardiac progenitors in the zebrafish embryo by injection of single blastomeres with a lineage tracer dye, and examined the formation of the zebrafish heart tube by serial sectioning of immunostained embryos. At the 512-cell stage (early blastula), most cardiac progenitors lie in a marginal zone that extends from 90 degrees longitude (midway between the future dors...