We have conducted an Hα survey of 38 0.77 z 1 galaxies over ∼100 arcmin2 of the Hubble Deep Field-North and Flanking Fields, to determine star formation rates (SFRs), with the near-IR multi-object spectrograph Cambridge Infrared Panoramic Survey Spectrograph (CIRPASS) on the William Herschel Telescope (WHT). This represents the first successful application of this technique to observing high-re...

In this article I review recent developments in near-infrared emission line searches for star-forming galaxies at high redshift. Using the J-, H& K-bands we can potentially chart the history of star formation over the range 1 < z < 5 using the prominent rest-optical nebular emission lines alone, filling in the “redshift desert” at z ∼ 1 − 3 where most common emission lines lie outside the optic...

This ISR documents the capability of WFC3 to detect high redshift galaxies using the Lyman break technique. We show that the broad wavelength coverage of the camera and its filter set allow efficient color selection of star-forming galaxy candidates over the redshift range 1<z<10. In multi-band imaging programs of ~100,000 seconds of total time, the instrument reaches the sensitivity required t...

The quality, depth, and multi–color nature of the Hubble Deep Field images makes them an excellent resource for studying galaxies at z > 2 using selection techniques based on the presence of the 912Å Lyman break. I present a descriptive review of this method and of the properties of the objects which it identifies, and summarize spectroscopic progress on galaxies with 2 < z < 4 in the HDF. Usin...

We present the results of detailed studies of the astrophysical conditions in z ∼ 3 Lyman Break Galaxies (LBGs), placing particular emphasis on what is learned from LBG rest frame UV spectra. By drawing from our database of ∼ 1000 spectra, and constructing higher S/N composite spectra from galaxies grouped according to properties such as luminosity, extinction, morphology, and environment, we c...

This paper investigates how to track a desired trajectory by a mobile manipulator that has redundant degrees of freedom (DOFs). Our approach is based on the analysis of its position and orientation. In the first part of the analysis, the manipulator contributes sub-vectors projected on the Z axis in the world frame, including position and orientation. In the second part, the mobile base and the...

Methods In Fig. 1, the low-power rf pulse (ω1)y and frequency offset ∆ω constitute an effective spin-locking field along the z′ axis of a tilted rotating frame, with an effective frequency 2 2 1 ( ) e ω ω ω = + ∆ and a tilt angle θ = arctan(ω1/∆ω) with respect to the normal Larmor rotating frame (θ = π/2 for an on-resonance spin-locking pulse without frequency offset) [1,2]. The magnetization a...

The rapid acquisition of positions by the upcoming Swift satellite will allow the monitoring for X-ray lines in GRB afterglows at much earlier epochs than was previously feasible. We calculate the possible significance levels of iron line detections as a function of source redshift and observing time after the trigger, for the Swift XRT, Chandra ACIS and XMM Epic detectors. For bursts with stan...

Structural skeletal differences of the femoral neck of older Beijing-Chinese and Perth-Caucasian women were compared; adjusting for frame size-related differences, Beijing-Chinese have lower periosteal width; however, indices of internal bone distribution suggest that Beijing-Chinese may exhibit increased resistance to fracture that may relate to the reduced hip fracture incidence. INTRODUCTI...