Ever since the earthquake and subsequent Fukushima nuclear disaster that occurred in Japan last year technology has been developed to help if such an event were ever to occur again. One of the biggest problems to overcome in Japan was a lack of power, which has led one Japanese company to create a light that runs purely on salt water.Green House Co. Ltd. has developed the LED Lantern (GH-LED 10WBW), which contains no battery, instead replacing it with a water bag. A mix of 350 milliliters of water and 16 grams of salt allow the lantern to act as a light source for up to 8 hours. After that, you just refill the bag for another 8 hours of light.The LED Lantern functions by using the salt water as an electrolyte. Once placed inside the lantern the solution works with magnesium and carbon rods to produce the necessary power for the light. The magnesium rod also needs replacing, but works for at least 120 hours and replacing it with a new rod is thought to be a simple task.The luminous power of the light is rated at 55 lumen, but the lantern isn’t just limited to acting as a light source. On its casing you will find a USB port, allowing you to plug in and charge other devices. So if you are stuck in a power outage at night you can use the LED Lantern to light the way while it charges your smartphone.Green House is expected to release the LED Lantern before the end of September in Japan. The one thing not yet know is the price, but due to the limited parts it uses I can’t see this being a very expensive device, but it’s certainly one lots of Japanese households will want to have ready in a cupboard just in casevia Tech-On!
The UV environment of the Beagle 2 landing site: detailed investigations and detection of atmospheric state
December 25th 2003 will see the Beagle 2 lander arrive at the surface of Mars in the Isidis region, allowing for the first time in situ measurements of ultraviolet (UV) flux directly from the surface of Mars through the use of a sensor designed as part of a miniaturised environmental package. The expected conditions the sensor will experience are studied here, and the detection signatures for phenomenon such as dust devils. H2O clouds ands near-surface fogs are presented. The beginning and end of mission surface fluxes show little variation, though the period towards mid-nominal mission does experience a maximum in total daily dose levels. Diurnal profiles are calculated highlighting the effects of increased scattering towards shorter wavelengths. A possible dust storm scenario is presented, and the effect upon component UV fluxes is shown to reverse the relative contributions of direct and diffuse components of the total UV flux. The presence of cloud formation above the landing site will be detectable though the observation of elevated diffuse/direct flux ratios. Near-surface morning fogs show a characteristic ‘dip’ in the morning profile when compared to clear mornings, allowing their detection on cloud-free mornings through post-event analysis of long term data. Predicted Phobos eclipses are investigated at each of the sensor centre wavelengths, and show greatest reduction in relative intensity at short wavelengths. Observations of near-miss eclipse events will also be possible, through monitoring of the diffuse UV flux. Dust devil encounters are shown to create a double minima lightcurve, with the depth of the minima dependent upon the total dust loading of the vortex. The effects of these changing conditions on DNA-weighted irradiances are investigated. Possible dust storms provide the greatest increase in biological protection, whereas expected cloud formations at the Beagle 2 site are found to offer negligible protection. Within just five minutes of landing > 95% of any Bacillus subtilis-like bacteria present on the surface of the craft will have lost viability.