Friday, November 9, 2007

Chemists from the University of Delaware, Newark, in collaboration with the University of Wisconsin-Madison, recently reported their preparation of a complex containing two chromium atoms connected by the shortest ever metal-metal bond, 1.8028 Å (0.2 nm) long. 1 Å is 1×10^?10 meters or 1/10,000,000,000 meters. The scientists, including Prof. Klaus H. Theopold and graduate student Kevin A. Kreisel, believe the compound contains a quintuple bond, i.e., five bonds between the two chromium atoms.

In general, shorter bonds containing more electrons will be stronger. Although single, double and triple bonds occur in nature, quadruple and quintuple bonds have so far only been found in the laboratory. The first compound with a quintuple bond was reported in 2005.

To make the complex, the scientists first reacted chromium chloride with a bis(2,6-diisopropylphenyl)diazadiene ligand, which has the structure Ar-N=C-C=N-Ar (Ar is a bulky aryl group). This intermediate dark-green compound was then reduced using KC₈ (potassium metal in graphite) to give the unusual product. The compound crystallises from ether as red/green plates. The quintuple bond between the metals is weakened by some mixing in from antibonding orbitals, reducing the overall bond order to around 4.28. The bond length is 0.026 Å shorter than the previous record, a dichromium complex reported in 1978 by F. Albert Cotton and coworkers, which featured a quadruple bond 1.828 Å long.

See the discussion page for instructions on adding schools to this list and for an alphabetically arranged listing of schools.

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.

Sunday, June 26, 2005

The median house price in the United States plunged 6.5% in May to $217,000. In February of 2005, the median price of a home was $237,300.

The Economist newspaper said in its June 16th issue; “In other words, it looks like the biggest bubble in history.” by way of reference to what is happening with housing prices in the USA and much of Europe.

Japan provides an example of how a boom can turn to bust. Property prices have dropped for 14 years in a row (40% from their peak in 1991); and yet, the rise in prices in Japan during the decade before 1991 was less than the increase over the past ten years in most of today’s “housing boom” countries.

The total value of residential property rose by more than $30 trillion over the past five years in developed economies, an increase equivalent to 100% of the combined GDPs of those countries. This increase dwarfs all previous house-price booms and is greater than the global stockmarket bubble in the late 1990s. Much of the recent housing activity is being driven by speculative demand. The National Association of Realtors (NAR) reported that 23% of all American houses bought in 2004 were for investment, not for owners to live in. Another 13% were bought as second homes. NAR also found that 42% of all first-time buyers made no down-payment on their home purchase last year.

Many investors are buying solely because they think prices will keep rising, which is a warning sign of a financial bubble. In Miami, Florida, as many as half of the original buyers resell new apartments even before they are built, and properties can change hands two or three times before somebody finally moves in.

Britain’s Royal Institution of Chartered Surveyors (RICS) reported prices have been falling for ten consecutive months. Forty nine percent of their surveyors reported falling prices in May. This was the weakest report since 1992 during Britain’s previous house-price bust.

Thursday, July 3, 2014

Ian Narev, the CEO of the Commonwealth Bank of Australia, this morning “unreservedly” apologised to clients who lost money in a scandal involving the bank’s financial planning services arm.

Last week, a Senate enquiry found financial advisers from the Commonwealth Bank had made high-risk investments of clients’ money without the clients’ permission, resulting in hundreds of millions of dollars lost. The Senate enquiry called for a Royal Commission into the bank, and the Australian Securities and Investments Commission (ASIC).

Mr Narev stated the bank’s performance in providing financial advice was “unacceptable”, and the bank was launching a scheme to compensate clients who lost money due to the planners’ actions.

In a statement Mr Narev said, “Poor advice provided by some of our advisers between 2003 and 2012 caused financial loss and distress and I am truly sorry for that. […] There have been changes in management, structure and culture. We have also invested in new systems, implemented new processes, enhanced adviser supervision and improved training.”

An investigation by Fairfax Media instigated the Senate inquiry into the Commonwealth Bank’s financial planning division and ASIC.

Whistleblower Jeff Morris, who reported the misconduct of the bank to ASIC six years ago, said in an article for The Sydney Morning Herald that neither the bank nor ASIC should be in control of the compensation program.

Wednesday, November 22, 2006

The 1999 and 2000 year model Honda Civic SiR tops the list of Canada’s most stolen cars.

Consumer popularity also assures the cars will be popular with thieves. Its the second year in a row the Honda SiR has topped the list.

Rick Dubin Vice President of Investigations for the Insurance Bureau of Canada said “The Civics are easy targets.”

Dubin said that once stolen, the cars are most often sold to “chop shops” where thieves completely dismantle the vehicles. The automobile’s individual parts are worth more than the entire car.

The sheer numbers of the cars and their lack of theft deterrent systems make them thieves’ preferred choices.

1999 and 2000 Honda Civics do not come with an electronic immobilizer, however all Hondas from 2001 and onward are equipped with an immobilizer. Immobilizers will be mandatory on all new cars sold beginning September 2007. The devices enable an engine computer to recognize an electronic code in the key. If the code in the key and the engine don’t match exactly, the vehicle can’t be started.

In third place was the 2004 Subaru Impreza, while the 1999 Acura Integra came in fourth, with the 1994 Honda Civic rounding out the top five.

In sixth place, the 1998 Acura Integra, and the 1993 Dodge Shadow completed seventh.

When asked why early model vehicles are selected, he said that, “auto thieves continue to find it easier to steal older vehicles lacking an IBC-approved immobilizer. We’ve seen this trend developing for several years, and these results confirm it.”

Another Honda automobile, the 1996 year model Civic filled eighth place, with the 2000 German Audi TT Quattro in ninth.

The American 1996 Chevrolet/GMC Blazer rounded out the top ten.

None of the above cars had an electronic immobilizer.

Wednesday, June 12, 2013

In May, periodical cicadas with 17 years life cycle emerged on the East Coast of the USA after underground development as juveniles since 1996. Researchers and scientists worked to map and study the rare wave, and the locals prepared for the noisy event. First recorded in 1666, the Magicicada septendecim species recently emerged in 1979, 1996, this year, with a next wave due in 2030.

This week, Wikinews interviewed Chris Simon, an ecology and evolutionary biologist at University of Connecticut, about the cicadas.

((Wikinews)) What caused your initial interest in periodical cicadas?

Chris Simon: As an undergraduate student, I was interested in the formation of species so when I went to graduate school I looked for a study organism that was likely to be in the process of forming new species. I chose periodical cicadas because they are broken up into reproductively isolated broods (or year classes). Reproductive isolation leads to speciation so I planned to study biochemical differences among the broods.

((WN)) You study the emergence of the periodical cicadas. What do you study? What observations are you making?

CS: We record exactly where each cicada population emerges (using GPS automated mapping and crowd sourcing). We record the presence or absence of each of the three morphologically distinct species groups of periodical cicadas (Decim group, Cassini group, and Decula group). We collect specimens for DNA analysis. We look for cicadas coming up one and four years early and late. We dig up cicada nymphs and monitor their growth rates.

((WN)) What equipment do you use?

CS: Nets, shovels, automated GPS recorders, cameras, laptop computers, automated DNA sequencers.

((WN)) Do you study the periodical cicadas with anyone else? What is their role?

CS: Yes, there are a large number of people studying periodical cicadas in my lab and in other labs. My lab is made up of Research Scientists, Postdoctoral Researchers, a technician, graduate students, and undergraduates. Research Scientist John Cooley is the leader of the GPS mapping project; he invented the automated GPS recorder; he built our crowd-sourcing website, and he is instrumental in public outreach. Postdoctoral research David Marshall also participates in the mapping project and leads the part of the research related to the mapping of stragglers. John and Dave and Technician Kathy Hill all study periodical cicada mating behavior and conduct mating and hybridization experiments. One of my graduate students Beth Wade has participated in the nymph collections and will soon start genetic work involving genome wide association mapping designed to locate genes related to life cycle. My graduate student Russ Meister is studying the genes of the bacterial endosymbionts of cicadas. My current undergraduate honors student Erin Dwyer is also studying the development of Magicicada nymphs and is helping to design a lab exercise for college students around the eastern US to do the same. Many of my past undergraduate students have studied the biochemical genetics and development of periodical cicadas. See the Simon Lab website.

CS: We are collaborating with Teiji Sota at the University Kyoto and Jin Yoshimura at Shizuoka University in Japan. They are studying the phylogeography of Magicicada. We are collaborating with John McCutcheon of the University of Montana who is studying the endosymbiont genomes.

CS: We are also collaborating with ecologists Rick Karban and Louie Yang, both professors at UC Davis who have an interest in cicada population dynamics and nutrient cycling in the ecosystem.

((WN)) You studied the periodical cicadas in 1979 and 1996 too. What changes with time?

CS: I have studied periodical cicadas since I was a student back in 1974. What changes with time is increased human development constantly shrinking the patch size of cicada populations.

((WN)) What are your thoughts on the long life span of the periodical cicadas? Why could it be so? What advantages and what disadvantages does it have?

CS: Most or all cicadas have long life cycles compared to your typical annual insect. Examples have been found of two-year to 9-year cycles in different species. Periodical cicadas evolved an even-longer life cycle and I think that part of this relates to the evolution of their synchronized life cycles and peculiar safety-in-numbers strategy for survival. To become synchronized, periodical cicadas had to evolve an exact length life cycle and all adults would have to appear in the same year. Because the nymphs grow at different rates underground, a longer life cycle and a way of counting years must have evolved so that the individuals that get to the last nymphal (underground juvenile) stage first would wait long enough for all other individuals in the population to become ready to emerge.

((WN)) News reports mention this is ‘Brood II’ of the periodical cicadas. What are the distinctive features of this specific species and what is its full scientific name?

CS: The same species exist in multiple broods. No species is restricted to Brood II. The three species present in Brood II are: Magicicada septendecim, M. cassini, and M. septendecula. These same three species are found in every 17-year brood (except the farthest north which only has M. septendecim).

((WN)) At what depth do the cicadas juveniles live underground?

CS: Most live within the top foot of soil but some have been found deeper. We do not know if they go deeper in winter. We need to do much more digging to understand the nymphs.

((WN)) How do people prepare for the cicada emergence?

CS: Of course various people prepare in different ways. Ideally, everyone prepares by studying information available on the web (especially on our websites Magicicada Central and Magicicada.org).

((WN)) Do cicadas affect transport in the local area?

CS: No, not really. Occasionally individuals can be seeing flying across highways and sometimes they smash into cars.

((WN)) Do cicadas usually stay outside or do they also invade houses too?

CS: They stay outside. One might accidentally fly in through an open window but that would be rare.

((WN)) What do the cicadas eat?

CS: Cicadas suck xylem fluid (the watery fluid coming up from the roots of plants) in deciduous forest trees and herbs. Essential amino acids in the cicada diet are supplied by their bacterial endosymbionts. There are two species of endosymbionts. One makes 8 essential amino acids and one makes two essential amino acids.

((WN)) Do cicadas damage crops or city vegetation? What damage?

CS: Cicadas do not chew leave so they do not damage crops like other insects. They can inflict some damage by their egg laying. Cicadas lay eggs in pencil-sized tree branches. If there are not enough branches available, too many female cicadas may lay eggs in a single branch weakening it and making it susceptible to breakage by wind. This can sometimes cause damage in fruit orchards. If the branches break, the eggs die so this behavior is selected against by natural selection.

((WN)) Thank you.

CS: You’re welcome. I am happy to have this opportunity to communicate with your readers!