[arc/sec] (Exhibition Review)

Inverse Trigonometric Functions Arcsec and Arccosec

The papers [1], [2], [16], [3], [12], [17], [13], [5], [8], [11], [14], [4], [6], [7], [10], [15], and [9] provide the notation and terminology for this paper. In this paper x, r denote real numbers. The following propositions are true: (1) [0, π2 [⊆ dom (the function sec). (2) ]π2 , π] ⊆ dom (the function sec). (3) [−π2 , 0[⊆ dom (the function cosec). (4) ]0, π2 ] ⊆ dom (the function cosec). (...

Peer review and competition in the Art Exhibition Game.

To investigate the effect of competitive incentives under peer review, we designed a novel experimental setup called the Art Exhibition Game. We present experimental evidence of how competition introduces both positive and negative effects when creative artifacts are evaluated and selected by peer review. Competition proved to be a double-edged sword: on the one hand, it fosters innovation and ...

Time FWHM Dates filter (s) (arcsec) Air Mass

LBQS 0103 − 2753 : A 0 . 3 Arcsec Binary Quasar

Imaging and spectroscopy with HST show that LBQS 0103−2753 (V = 17.8, z = 0.848) is a binary quasar with a separation of 0 .3 or 2.3 kpc. This is by far the smallest separation binary quasar reported to date. The two components have very different spectra, including the presence of strong broad absorption lines (BALs) in component A only. The emission-line redshifts, based on the broad high ion...

Micro-arcsec Astrometry of the Milky Way and Beyond

Recently we have been able to achieve parallaxes and proper motions with accuracies approaching microarcseconds using the VLBA. The apparent proper motion of Sgr A* has been measured with extremely high accuracy, strongly constraining Θ0/R0 and potentially offering a new dynamical definition of the Galactic plane. The intrinsic motion of Sgr A* perpendicular to the Galactic plane is extremely s...