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Wednesday, September 1, 2010

On Monday, Australian telecommunications company Telstra has introduced dual carrier HSPA+ standard for broadband Internet business customers in the Next G network. This is the first time this technology is being introduced on national scale. The bandwidths the users can deploy increased into two to three times, with Telstra becoming the world’s fastest national mobile broadband service. The switch started with enabling the service for premium users. After some feedback, Telstra may expand the plan.

The higher speeds for wireless are intended to simplify and ease multitasking of users.

John Paitaridis, Telstra’s executive director, network products and services in Enterprise & Government, said “One of the reasons we decided to launch first to Enterprise And Government and Business customers is that clients are saying that their ability to access applications quicker makes a difference to their business and when they start to equate time savings and doing calculations around productivity it does become a return on investment.”

Telstra Business Group Managing Director Deena Shiff also stated that the efforts aren’t as sudden as it might seem, having feedback of many users as the base.

Australians are telling us they can’t afford to be tied to the desk all day and these new speeds mean they can now access mobile broadband at speeds typically reserved for the office. We have been deploying the high-speed capability in the network since December 2009 and now, with the launch of the new Ultimate USB Modem, these new speeds are available to customers across all capital city CBDs and associated airports, selected metropolitan areas and in more than 100 regional locations. These high-speed zones cover approximately 50 per cent of the Australian population and match the areas of highest customer demand and will make the frustration of waiting around for files to download a thing of the past. In other metropolitan and regional areas, the Telstra Ultimate USB Modem offers typical download speeds ranging from 550kbps up to 8Mbps… Our customers have told us that they want higher speed mobile broadband so they can work more flexibly outside of the office and we are delighted to be the first in the world to offer these new blistering speeds on a national network. The new Telstra Ultimate USB Modem provides customers with the speeds needed to handle large files, multi-task and update cloud-hosted applications effortlessly on the go when they are in a coverage area.

Previous modems were able to reach peak speed 21Mbps, with real life speeds ranging from 0.5Mbps to 8 Mbps. The theoretically expected maximum of the new technology is 42Mbps with user speeds varying between 1.1 and 20 Mbps. The new speed is twice as fast. This is caused by that the dual-carrier “Evolved High-Speed Packet Access” technology allows networks to send and receive wireless data using two channels simultaneously. This technology can be deployed on Next G networks. Telstra switched to them in February, thus making the switch to HSPA possible now.

Telstra delayed the implementation of the new technology until elections end. This decision was intended to avoid wrong interpretation of them by Coalition. Coalition’s claims include that wireless networks can be an alternative to the Labor party “fibre-to-the-home” proposal to introduce more expensive wired Internet. The announcement of the new technology, initially planned on August 25, was delayed, with Telstra spokesman Craig Middleton explaining, “We just didn’t want to feel like we were influencing the [telecommunications] debate.”

The political parties have different plans on development and funds on the Internet. The Labor party aims to spend AUD 43 billion to bring 1 Gbps wired Internet nationwide, and the Coalition plans to spend AUD 6 billion to introduce a variety of improvements including upgrade of existing copper Internet as well as expansion of wireless Internet to support 12Mbps. Opposition leader Tony Abbott has said in the past that Australians shouldn’t assume wireless technologies won’t ever be comparable to fixed-line technology. Telstra’s upgrade shows that wireless broadband is reaching the 100 Mbps minimum speeds promised by Labor’s national broadband network.

Telstra has only 2000 devices which support the new technology. This is why the opportunity to try it out is being given only to the Business plan customers, and they receive it for the same price as they were paying for the previous NextG plan. Since October 5, the device will be available for sale, with the Business customers able to buy it with 75% discount and a prepaid data allowance. The upgrade is expected to cover roughly 50% of the population. This is happening at the same time as one of Telstra’s competitors Vodafone is doubling data download quotas on mobile cap plans.

As some testing showed, real life download speeds reached only about the half of the maximum. Telstra executive director of wireless Mike Wright explained that the predicted figures were the estimates, with real life speeds lower due to interfering environmental conditions: “It’s possible to achieve better than the typical user speed claims, but those claims occur in the ideal network environment with good signal quality. When you’re out on the streets you get a lot of variation where the network is subject to signal quality, your location and the network load.”

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Due to the damage by Hurricane Katrina and subsequent flooding, a number of colleges and universities in the New Orleans metropolitan area will not be able to hold classes for the fall 2005 semester. It is estimated that 75,000 to 100,000 students have been displaced. [1]. In response, institutions across the United States and Canada are offering late registration for displaced students so that their academic progress is not unduly delayed. Some are offering free or reduced admission to displaced students. At some universities, especially state universities, this offer is limited to residents of the area.

Monday, May 23, 2005

The staff of the British Broadcasting Corporation (BBC) have entered a one-day strike this morning in dispute of impending job cuts and partial privatisation.

The industrial action follows union ballots at three of the leaders of journalism and broadcasting: Amicus, National Union of Jounalists and BECTU. The NUJ have already described the action as an “astonishing success” and its general secretary, Jeremy Dear, describes the union as “absolutely delighted with the level of support we have received for the strike.” The unions expect 11,000 of 27,000 BBC staff to take part in the strikes.

Due to the extensiveness of the strike it has affected the output of the BBC on its television and radio services. News and live services have been particularly badly affected following the unions aims to leave “blank screens and dead air”.

BBC Radio 4‘s Today, The World at One, PM and The World Tonight have all been cancelled; BBC One‘s 1 O’Clock News and 6 O’Clock News was shortened from half an hour to 15 minutes, although the 10 O’Clock News was unaffected. Live programming of BBC News 24, BBC World and Five Live have been extensively cut; and international output on the World Service has been impacted.

The most noticeable impact have been on the Breakfast programme, headed by just one presenter (against the usual two) and cut short for a pre-recorded interview. The leading serious news magazine programme, Newsnight, was also cancelled.

Some BBC radio celebrities appeared for work on their shows despite the strike. These include breakfast radio presenters Chris Moyles of BBC Radio 1, Terry Wogan of BBC Radio 2, and Shelagh Fogarty of BBC Radio 5.

Unlike a similar 1989 strike in which presenter Nicholas Witchell crossed the pickets to read news, those presenters who have decided to continue their positions have not been publicly denounced.

Striking staff have been picketing outside the main entrances of the BBC Television Centre in west London.

The strikes have occurred following the Corporation’s plans to cut 3780 jobs and privatise parts of the national service. It has claimed that these cuts are necessary to spend more on programming when they were announced in March by governing director Mark Thompson. The cuts aim to make savings of GBP 355 million (US$663.37 million, EUR 487 million ).

Unions have defied calls by BBC executives to partake in consultations over impending actions. The unions have responded by claiming that consultations would give their staff little say and that negotiations are the only way in which they will be listened to.

The ballot to strike which was held on May 12 also determined to strike for 48 hours on May 31 and June 1. It is unclear if any further action is planned.

Saturday, October 14, 2006

An American inventor has patented a pair of new time formats with a footprint less than 50% of that of conventional four-digit time. The more unusual of the two new formats, called “TWELV”, dispenses with numerals altogether. In place of clock hands or digits, the new clock uses color to convey the hour and a moon image to convey the minute, which moon slowly grows throughout the course of an hour from a narrow crescent to a full-fledged circle.

The second and more approachable of the new formats retains numerical digits to indicate the minute but uses colors to convey the hour.

Early critics question whether the aesthetic benefits of the moon-clock will be sufficient to encourage users to learn the color-based time-telling system. However, the size advantages of the new system may make it particularly suitable for mobile applications, particularly cell phones, wearable computers, and head-mounted displays.

Saturday, October 15, 2005

In the November issue of the Journal of Clinical Investigation,researchers announce that they have found that cannabinoids promoted a generation of new neurons in rats’ hippocampi. The study held true for both a plant-derived and a synthetic cannabinoid. The hippocampus is a part of the brain that contributes to learning and memory. In particular, it has been shown that the hippocampus is essential for the formation of new episodic memories.

“This is quite a surprise, chronic use of marijuana may actually improve learning memory when the new neurons in the hippocampus can mature in two or three months,” said Xia Zhang, with the Neuropsychiatry Research Unit of the University of Saskatchewan.

“Our results were obtained from rats, and there’s a big difference between rats and humans,” added Zhang, “So, I really don’t know yet if our findings apply to humans. But our results indicate that the clinical use of marijuana could make people feel better by helping control anxiety and depression.”

Zhang and his co-workers performed behavioral tests on two purified cannabinoids. The test results indicated that these two cannabinoids have anti-anxiety and antidepression-like effects in rats that may depend on the ability of cannabinoids to promote the production of new neurons in the hippocampus. Marijuana contains a complex mixture of chemicals including cannabinoids and may have somewhat different behavioral effects than the purified cannabinoids tested so far.

Previous studies examining the effects of cannabis have highlighted negative aspects of the drug’s use, such as short term memory difficulties, increased heart rate, nausea, and (in a very small percentage of people) hallucinations. Long term studies about cannabis use tend to be controversial as the data is seen to be biased or flawed. The most agreed upon effect of long term cannabis use is lung damage. However, proponents argue that the correlation between cannabis consumption and lung cancer is misleading suggesting that cannabis use may correlate with tobacco use or that the data is not being properly analyzed.

Monday, April 21, 2014

Scientists at Chicago’s Field Museum and New York’s American Museum of Natural History have discovered three new species of yellow-shouldered bats, genus Sturnira, in the Neotropics. On Wednesday open-access journal ZooKeys published their paper on two of the new species, Sturnira bakeri and Sturnira burtonlimi. The two new species were previously confused with S. ludovici, and S. lilium and S. luisi, respectively. With the discovery, genus Sturnira now has the most species of any genus in family Phyllostomidae, the leaf-nosed bats.

Species S. bakeri was named after Dr. Robert J. Baker, who “has made enormous contributions to our [Authors of the ZooKey paper] understanding of bats, particularly to the evolution of Neotropical phyllostomids”; and S. burtonlimi after Dr. Burton K. Lim, who “collected the type series of this species and has made many other important collections throughout the Neotropics and beyond”, the authors noted in the paper.

Within the New World tropics, the distribution range of the genus, the new species’ known living areas are in Costa Rica and Panama for S. burtonlimi, and Western Ecuador for S. bakeri. The researchers identified differences between different specimens, including those in their teeth, skull shapes, and DNA sequences.

Wikinews interviewed one of the chiropterologists, Paúl M. Velazco of the American Museum of Natural History, about the study.

((Wikinews)) The Sturnira genus now has 22 species, over 1.5 times larger than it was a year ago (14 species). Who contributed to this change? Did you participate throughout the entire process, or only the discovery of the last 2 species?

Paúl M. Velazco: The last Mammal Species of the World (Simmons, 2005) recognized 14 species for Sturnira. Since then three new species have been described [S. sorianoi Sánchez-Hernández et al., 2005; S. koopmanhilli McCarthy et al., 2006; and S. perla Jarrín-V. and Kunz, 2011] and one subspecies was elevated to the species level (S. hondurensis) by Gardner (2008). This brought the number of species of Sturnira to 18 by 2011. Along with my coauthor Bruce Patterson, we generated the most comprehensive phylogeny of the genus. For this we sequenced two nuclear and three mitochondrial genes from the liver or muscle tissue that had been frozen or preserved from each bat specimen, isolating nearly 5,000 base pairs of DNA. These sequences were obtained from specimens we have collected in the past (38) and from tissues we borrowed from different natural history collections. We published this phylogeny last year in the journal Molecular Phylogenetics and Evolution. Results of this study found that two subspecies of Sturnira lilium should be recognized as valid species (S. parvidens and S. paulsoni). Additionally we found three new species, two of them described in the ZooKeys paper. The third one hopefully will be published later this year.

((WN)) The genus is called Sturnira Gray in the paper. I’ve not seen extra adjectives in genus names, before. What is the context for such name?

PMV: Usually in papers that deal with taxonomy and nomenclature, the first time that a genus or species is mentioned in text is accompanied by the authority that describes that taxon. In the case of Sturnira, it was Gray in 1842 that named the genus.

((WN)) What caused your initial interest in the question in the genus? When did you become interested?

PMV: I have been studying bats for the past eighteen years and I am especially interested in the family Phyllostomidae that is endemic to the Neotropics. This family includes more than 160 species. It is the most diverse family of bats in the Neotropics, which together exhibits more variation in morphological features and feeding ecology than any other family-level group of mammals. Phyllostomid bats exploit an unusually diverse array of feeding habits including sanguivory, insectivory, carnivory, omnivory, nectarivory, pollennivory, and frugivory. Because of all mentioned before, phyllostomids are a really interesting group to work with. Sturnira and Platyrrhinus are members of this family.

((WN)) The paper mentions that the genus is now the most speciose genus in the Neotropical family Phyllostomidae. What genus did it beat? How many species does it include?

PMV: The other genus with the most species in the family is Platyrrhinus. Currently, it has 20 species, but soon it will increase to 21. Along with another colleague, Burton Lim, we have a paper in press describing a new species based on molecular and morphological data from the Guianan Shield.

((WN)) What equipment did you use?

PMV: For the ZooKeys paper, we examined several specimens under the stereoscope. The molecular phylogeny gave us the separation between species, from there our job was to focus on finding morphological differences between these groups.

((WN)) Did you conduct field study to identify the species’ habits? If so, where and how did you do that?

PMV: I have done fieldwork in Belize and Peru, and my coauthor did field work in Brazil, Ecuador, and Peru, where we collected several specimens of Sturnira (including the third species that has not been described yet). But the two species that were described in the ZooKeys paper are based on specimens collected by our colleagues Dr. Robert Baker from Texas Tech University and Dr. Burton Lim from the Royal Ontario Museum.

((WN)) How do you isolate of the living area of the new species from the living area of the old species?

PMV: We used the phylogeny of Velazco and Patterson 2013 (Molecular Phylogenetics and Evolution) as a framework for this.

((WN)) How long did the study take? What has been the most time-consuming activity?

PMV: It took almost a year. The most time consuming part was spending several hours behind the stereoscope looking for the diagnostic characters.

((WN)) Who participated in the study? What were their roles?

PMV: Dr. Bruce Patterson from the [American] Museum of Natural History and I. I was the one in charge of finding the diagnostic characters and together we both worked on the manuscript.

((WN)) Who do you collaborate with internationally about your study?

PMV: For this study I collaborated directly with Dr. Bruce Patterson from the Field Museum of Natural History, but studies like this cannot be completed without the contribution of scientific collections. We used specimens from the American Museum of Natural History, Carnegie Museum of Natural History, Louisiana State University, Museum of Southwestern Biology, Museo de Historia Natural de la Universidad Nacional de San Marcos, Museo de Zoología of the Pontificia Universidad Católica del Ecuador, Museum of Vertebrate Zoology at Berkeley, Royal Ontario Museum, Texas Tech University, and the National Museum of Natural History.

((WN)) What future research do you plan?

PMV: To keep doing what I love, which is going to the field, working at collections, and collaborating with the wonderful collaborators I have, all of this is an effort to try to understand bat diversity and evolution in the Neotropics, especially why phyllostomid bats are so successful at this. There is still much to discover, and hopefully we could, in time, implement conservation actions for species that have small distributions.