We survey the observations of Titan that can be made using equipment available to amateur astronomers. Off-the-shelf hardware includes spectrometers and photometers that can detect Titan’s infrared light curve and potentially its clouds. CCD spectra and photometry (both photoelectric and CCD), even with small (20cm) telescopes, are useful for monitoring seasonal changes in Titan’s haze. Recent ...

Determination of Ionospheric Current Systems by Measuring the Phase Shift on Amateur Satellite Frequencies

Objective: To perform a clinical trial to evaluate human embryos generated in the protein-free medium (PFM). Materials and methods: The quality of embryos generated in medium with (control; Medi-Cult) and without protein (test; ART-7b) and their viability were compared. Sperm was prepared in control or test media as appropriate. Effect of different antibiotic supplements in the PFM was investig...

BACKGROUND Most published studies on injuries in the ballet dancer focus on the lower extremity. The rigors of this activity require special training and care. By understanding prevalence and injury pattern to the musculoskeletal system, targeted prevention and treatment for this population can be developed. PURPOSE To determine the incidence and prevalence of musculoskeletal injuries in ball...

INTRODUCTION Returning an athlete to play following a spinal or concussive injury remains a challenge for the health practitioner making the decision. Among the possible mechanisms responsible for such injuries in amateur football, the concept of "spearing" has attracted a great deal of attention in sport medicine. OBJECTIVE The purpose of this paper is to present a review of the diagnosis an...

Corresponding author: C T Viljoen ([email protected]) Rugby players are exposed to a higher risk of injury than participants in other sports, as players may legitimately be involved in collision incidents.[1] A recent review reported that head injuries, including concussions, are the most frequently reported injuries in professional rugby.[2] Concussion is defined as a ‘traumatically induced...

BACKGROUND Little solid information is available on the possible risks for neuronal injury in amateur boxing. OBJECTIVE To determine whether amateur boxing and severity of hits are associated with elevated levels of biochemical markers for neuronal injury in cerebrospinal fluid. DESIGN Longitudinal study. SETTING Referral center specializing in evaluation of neurodegenerative disorders. ...

We introduce a novel outlook on the self-calibration task, by considering images taken by a camera in motion, allowing for zooming and focusing. Apart from the complex relationship between the lens control settings and the intrinsic camera parameters, a prior o -line calibration allows to neglect the setting of focus, and to x the principal point and aspect ratio throughout distinct views. Thus...

Clio, who has taken History under her gracious patronage, is one of the nine pulchritudinous daughters of Zeus. Since Clio is a Greek maiden it is fair to assume that she may be wooed and can be won. She has many admirers and a few suitors. All these can be classed in three groups-the dilettants, the amateurs, and the cognoscenti. The dilettant flirts with History, the connoisseur is wedded to ...

In this article, we present a Digital Amateur TeleVision (D-ATV) transmission system. Its signal can be received by cheap set-top boxes available for less than 150$. It offers a wide user-selectable trade-off between signal bandwidth and picture quality, and at 4.5 MHz -40 dB bandwidth achieves better picture quality than analog systems.