The annual variation in quiet time plasmaspheric electron density, determined from whistler mode group delays

first_imgWhistler mode group delays from the VLF Doppler experiment at Faraday, Antarctica (65°S, 64°W) show an annual variation that has a maximum in December and a minimum in June/July. Assuming signal propagation at constant L (L = 2.5), this implies an annual equatorial electron density (Neq) variation, with December values 3 times higher than in June (during solar minimum—1986). This annual variation in Neq can be modelled from the combined ƒƒoF2medians at each end of the field line (Argentine Islands and Wallops Island), by assuming that diffusive equilibrium is maintained from the F2 layer to the equator over long (≥ 1 month) time scales during quiet magnetic conditions. The use of this model enables the longitude dependence of the annual Neq variation to be investigated. ƒƒoF2data from two other pairs of near-conjugate stations at ∼ 50°E and ∼ 180°E suggest that there are probably no other regions where there are such large annual variations in Neq at L = 2.5. Whistler mode group delays from a similar VLF Doppler experiment at Dunedin, New Zealand (45.8°S, 170.5°E) show an annual variation that is much smaller, and in agreement with the model results at that longitude. At Faraday during solar maximum conditions, the phase of the annual variation is similar to that observed at solar minimum, but the amplitude is smaller, the December–June ratio in Neq being about 2:1.last_img read more

OAS Against Arms Trafficking

first_imgBy Dialogo August 24, 2011 The Organization of American States (OAS) is promoting an initiative to combat illicit firearms trafficking through a program implemented in Latin American and Caribbean countries. The program consists in adding to the manufacturers’ marks the weapons normally carry, such as serial number, model, and caliber, others such as the importing country, where the weapon was seized, and others that can enable identification of the weapon’s trajectory from its point of origin to its destination. This can help “to identify at what point a weapon entered the illicit arms market and/or help to identify the perpetrator of a crime,” something that is “a very effective tool for combating the trafficking of firearms in the hemisphere,” according to the statement. The OAS indicated that 25 member states have expressed interest in participating in the program, and 13 of them have so far signed a cooperation agreement. These countries are Barbados, the Bahamas, Belize, Costa Rica, El Salvador, Grenada, Guatemala, Uruguay, Paraguay, Saint Lucia, Saint Kitts and Nevis, Saint Vincent and the Grenadines, and Trinidad and Tobago. It is expected that as a result of this program, it will be possible to mark at least 25,000 firearms throughout the hemisphere in 2012.last_img read more

Beat writers predict blowout win for Syracuse in season-opener

first_img Published on September 4, 2015 at 4:46 pm Before Syracuse kicks off its season against Rhode Island at 7 p.m., our beat writers predict the score of the Orange’s season debut. All four see a blowout SU win in the cards and for Scott Shafer to cruise to a 1-0 start in 2015.Sam BlumSyracuse 54, Rhode Island 0Open RhodeLast year it took Syracuse two overtimes to defeat Villanova, 27-26. And while the Wildcats might be in Rhode Island’s conference, they aren’t in the same league. The Orange will make quick and easy work of the Rams, with the only drama late in the game surrounding whether or not SU’s second-team defense can preserve the shutout.Jesse DoughertySyracuse 35, Rhode Island 14Grab life by the hornsIt will look more like a landslide than the scoreboard may indicate. The first week of the season always calls for a fluke or two, but Syracuse doesn’t completely fall victim this time. AdvertisementThis is placeholder textMatt SchneidmanSyracuse 42, Rhode Island 7Dodging the ramRhode Island is not Villanova. This game won’t be like last year’s season-opener against an FCS opponent since the Rams are one of the worst in the country. Syracuse finds a way to get in the end zone six times and the Orange exhales in the fourth quarter.Paul SchwedelsonSyracuse 38, Rhode Island 7Rhode TripThe ride back to Kingston, Rhode Island will be a long one as Syracuse will get out to an early lead and subsequently milk the clock and empty the bench. The only way the Rams compete is if … Well, that just won’t happen for the team coming off a 1-11 season. Comments Facebook Twitter Google+last_img read more