Tag: 上海宝贝贵族

Letterkenny gardaí take in new paw patrol recruit – is it yours?

first_imgA dog is staying in Letterkenny garda station for ‘arrest’ today after being found lost on Pearse Road last night.A search has been launched for the pup’s owner – but they may not want to leave while gardaí host their charity coffee morning today!Treats will be plentiful all morning from 10.30am and everyone is welcome to enjoy them in aid of Mary’s Meals. But the little dog can’t have all the pawty food to himself, so if you are its owner, please contact Letterkenny Garda Station on 074 9167100.Lost dog in Letterkenny Garda Station – All queries to Letterkenny Garda Station on 074 9167100. Letterkenny gardaí take in new paw patrol recruit – is it yours? was last modified: November 8th, 2019 by Rachel McLaughlinShare this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pocket (Opens in new window)Click to share on Telegram (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to share on Skype (Opens in new window)Click to print (Opens in new window)last_img read more

December 21, 2019 0

Dating Stars as Models

first_imgMany have dreamed of dating a star, but the way astronomers do it is less glamorous.  For one thing, they need to know how old she is first, and how good a model she makes.  In a Perspectives piece for Science,1 David R. Soderblom of the Space Telescope Science Institute explained the requirements for stellar dating in an article entitled, “How Old Is That Star?”    It’s not that simple lining up a date.  Many agents tend to get in the way:Determining how long it has been since a star formed is a lot harder than it seems like it ought to be, and many very basic questions hinge on stellar ages.  For instance, we’d like to know the ages of stars that have planets.  We hope to detect signs of life on planets around other stars, but if we do, knowing the star’s age is central to interpreting what is observed.  Among the youngest stars, we’d like to know how long it takes for planetary systems to form and evolve.  On a grander scale, the ages of stars and clusters of stars are needed to infer the history of our Milky Way galaxy and the pieces from which it was built.  Did the halo of our galaxy form on its own or from fragments of captured satellite galaxies?  Did the thick disk form after the halo or contemporaneously?  Has the thin disk (of which the Sun is a member) formed stars continuously, or in episodes?  Many very basic questions can only be addressed if we can establish reliable ages.The parameters we measure are in the present (with regard to the time of light travel from source to observer): mass, chemical composition, magnetic field, and other characteristics teased from the spectrum.  Soderblom claims “we can measure a precise and exact age for just one star–the Sun–and that’s because we can analyze solar system material in the laboratory, something we can do for no other star.”  Even that age, however, is highly model dependent.  That makes estimates of other stars’ ages derived from it even further model dependent:By calibrating models against the Sun, we can comprehend stars that are both more and less massive.  Our understanding of the evolution of stars is closely tied to studying star clusters, groups of hundreds to thousands of stars that were formed together and so share the same composition and age.  Or do they?  Some of the most exciting astrophysics from the Hubble Space Telescope has been the discovery of multiple populations within single globular clusters, which are some of the oldest components of the Milky Way.  Given what we now know about stellar physics, the available explanations include multiple ages (i.e., several epochs of star formation spread well apart in time), very different compositions of the cluster’s members, or both.  Neither alternative satisfactorily explains the observations, and a very basic conundrum has been exposed.The model uncertainties are on the order of 10-20%, he claimed, but one should also keep in mind that these uncertainties have “poorly understood systematic effects.”  Relative ages are more believable, he said.  Even when using radiometric ages, the derived dates must be interpreted from when the isotopes formed without knowing the initial abundances.  These do not necessarily reflect the age of the star.    Soderblom examines some of the “empirical” measurements for dating stars: loss of angular momentum over time, and asteroseismology (oscillations).  Both these methods are also model dependent: “We can see a consistent relation between a physical quantity and age, but we do not understand the underlying physical relation, even though we may have at least a reasonable scenario.”  What is considered reasonable becomes subjective.  Some techniques seem more “promising” – language indicative that the key component of the spectrum may be the human element.    “Overall, the situation for determining stellar ages is still sobering, and progress has been slow,” he ended.  It has reached the point where cosmologists claim better precision for their measurements than we can for the ages of the nearest and brightest stars.”  He did not distinguish between claims and realities, however, since cosmological claims are also highly model dependent.  Within his own subject matter, “The challenge of determining an accurate age for a star therefore remains outstanding.”1.  David R. Soderblom, “Astronomy: How Old Is That Star?”, Science, 2 January 2009: Vol. 323. no. 5910, pp. 45-46, DOI: 10.1126/science.1168230.People need to know the hand-waving and speculation that belies the confidence expressed on TV science specials.  One can detect enough wiggle room to permit major paradigm shifts.  Notice that model dependence is not observation dependence.  We can observe emanations from objects that hit our eyeballs in the present; what does that mean about their origins and histories?  One cannot know that without making assumptions.  The reasonableness of assumptions is a matter of opinion.  It may seem reasonable to you, but if a member of the Space Telescope Science Institute says that “The challenge of determining an accurate age for a star therefore remains outstanding,” that should at least be noted in the minutes.(Visited 8 times, 1 visits today)FacebookTwitterPinterestSave分享0last_img read more

December 19, 2019 0

Bahrain Arrests Poet, China Arrests Artist: This Week in Online Tyranny

first_imgTags:#TWiOT#web Related Posts curt hopkins 8 Best WordPress Hosting Solutions on the Market A Web Developer’s New Best Friend is the AI Wai…center_img Top Reasons to Go With Managed WordPress Hosting Poet arrested by Bahrain security. After reciting a satirical poem during the Bahraini protests, Ayat Al-Qormezi was arrested. Her parents were tortured by gunmen, who told them their four sons, who had been forced face-down onto the floor, would be murdered before their eyes if they were not told where their daughter, the poet Ayat, was. Mahmood Al-Yousif, the Bahraini “blogfather” who was arrested last week, was freed shortly thereafter due in part to pressure from the U.S. government. Will the U.S. exert equal pressure to free a young lady whose fame is mostly as a poet? Will Bahrainis agitate for her release? Additional Bahraini bloggers arrested in the crackdown include Mohamed El-Miskati.If anyone has a link to, or copy of, the poem that Ayat recited in Pearl Square on the 23rd of February, please share it with all of us in the comments. American governmental transparency sites to be shuttered. It was reported that Data.gov and a number of related sites, started at the instruction of President Barak Obama to increase transparency in government, are going to be shut down due to budget constraints. Some groups are mounting challenges to those shut-downs. China arrests its best-known artist. Ai Weiwei, a globally-regarded artist and the architect of the “Bird’s Nest” stadium, was arrested this week by Chinese authorities. Ai is a blunt-talker and critic of the government. ReadWriteWeb founder, Richard MacManus, served on a panel last year with Ai and reports on the efforts to free him. U.S. developing cell phone “panic button.” The U.S. government is funding the development of an application that will allow pro-democracy activists to delete all incriminating evidence on their cell phones with a single click while sending out an alert to their fellow activists.LiveJournal suffers DDOS attacks. For the past several weeks, LiveJournal, one of the earliest blogging hosts, has been suffering large-scale distributed denial of service attacks. The company says that the attacks have targeted a number of different users’ journals, some of whom are political in nature. The service has a large number of Russian users, including its president, Dmitry Medvedev.Ayat photo via Islamic Human Rights Commission Why Tech Companies Need Simpler Terms of Servic…last_img read more

December 16, 2019 0

Tax-Deferred Retirement Savings Plans

first_imgBy Barbara O’Neill, Ph.D., CFP®, Rutgers Cooperative Extension, [email protected] Ready? Strategies for Military Families was offered in November Included in the Nov. 1 session was a segment about personal finances and tax-deferred retirement savings plans that are available to military families.Here is a summary of these plans:IRA- An Individual Retirement Account enables workers with earned income (i.e., salary from a job or net earnings from self-employment) to invest for retirement. IRAs are not an investment, per se, but, rather, a special classification for tax purposes.The actual investment will be in different types of securities such as stocks, bonds, certificates of deposit, or mutual funds.Arrangements to open an IRA account are made with a financial institution such as a bank, brokerage firm, or mutual fund.myRA (now ended) A Roth IRA that invests in a new U.S. Treasury savings bond that earns interest at the same rate as investments in the Thrift Savings Plan (TSP) Government Securities (G) Fund available to service members and federal government employees. Workers can transfer a myRA account balance into a private sector Roth IRA at any time.When myRA balances reach $15,000 or accounts have had a lower balance for 30 years, they will also be transferred to a private sector Roth IRA. myRAs were especially designed for workers who don’t have access to a retirement savings plan at work but can also be used by other workers. Deposits can be made from a worker’s paycheck, from a checking or savings account, or with a federal income tax refund.Retirement Savings Plans for the Self-Employed- Can be set up by workers who are self-employed as a whole source of income and those who engage in freelance work in addition to their “day job.”Options include a simplified employee pension or SEP, SIMPLE plans, and Keogh plans. SEPS are often used by freelancers and sole proprietors and are the least complicated account to administer.Employer Salary Reduction Plans- Many employers offer defined contribution plans, such as 401(k)s, where employees voluntarily reduce their salary by a specific dollar amount (generally, a percentage of gross income) which is set aside for retirement.When it’s time to retire, workers have available the amount they have saved, plus or minus earnings (or losses) on their selected investments. The account balance is portable and can be taken when employees leave a job and rolled over into an IRA or a new employer’s retirement savings plan.Available savings plans include the Thrift Savings Plan (TSP) for service members and federal government workers, 401(k) plans for employees of for-profit corporations, 403(b) plans for public and private school and non-profit employees, and 457 plans for state and local government workers. 2016 maximum contributions are to $18,000 (24,000 for those who are age 50 or older before the end of the year). Unlike IRAs, the “menu” of investment options for employer retirement savings plans is limited to securities selected by the employer or the employer’s retirement plan provider. Therefore, investment advisors often recommend balancing investments that are selected within tax-deferred plans with different types of investments that are held in IRAs and/or taxable accounts.Don’t let the large annual maximum contribution limit numbers scare you. The required minimum can be as low as 1% of a worker’s pay or a small amount such as $10 per paycheck. Simply save whatever you can, subject to minimum deposit amounts required by a plan custodian. Any savings is better than no savings!Minimum deposits required to set up an IRA vary with the financial institution and type of investment. A bank may require $500 to purchase a CD for an IRA and a mutual fund may require a $1,000 minimum deposit or higher.Make the most of tax-deferred investments by saving as much as you can and assembling a well-diversified portfolio that includes different asset classes (e.g., stocks, bonds, and cash assets). Want to know more about investments available for retirement savings? Visit Investing for Your Futurelast_img read more

December 12, 2019 0