3D ISM-Shock Spectral Emission: X-ray models for Radio Galaxy SED Modeling

Galaxies form out of small fluctuations in a smoothly expanding Universe. However, the initial gravitational collapse phase is accompanied by the formation of supermassive black holes and clusters of massive stars. Black holes and star clusters generate powerful outflows in the form of jets and superwinds that interact with still infalling gas, possibly regulating the galaxy formation process, initiating new sites of star formation, and carrying chemically enriched gas to the intergalactic medium. Unfortunately, beyond this qualitative description our detailed theoretical understanding is poor. New results from 3D simulations of a GPS/CSS galaxy, with gravitational potentials included, shed some new light on the jet driven outflow process in particular. New code capabilites to predict detailed X-ray spectra from multi-dimensional time-dependent dynamics simulations of Galaxy Feedback, and will be useful for future interpretation of X-ray and radio SEDs of forming galaxies.Comment: 10 pages, 5 figures, Invited Conference Talk, The Spectral Energy Distribution of Gas Rich Galaxies: Confronting Models with Data, Heidelberg, Germany,October 4-8, 200

Character and Candor Requirements for FCC Licensees

The Communications Act explicitly makes the applicant\u27s character an element in licensing. Applications must set forth such facts as the Commission by regulation may prescribe as to the citizenship, character, and financial, technical, and other qualifications of the applicant to operate the station. Even in the absence of such guidance, the Commission could scarcely ignore evidence of bad character in making its ultimate determination whether a grant will serve the public convenience, interest, or necessity. The Act mentions the related problem of misrepresentation only in connection with the Commission\u27s power to revoke licenses. Misrepresentation, or lack of candor, may, nevertheless, be treated as a defect of character, or as an independent ground for finding that public interest does not call for licensing someone who deceives the licensing authority. There is, it will appear, not much question about the Commission\u27s power to demand high standards of truthfulness and candor as well as of character. There is also little doubt that, at least for the last decade, the Commission has set high standards. The questions that merit attention are rather these: 1) In what circumstances is the power exercised? 2) Is it abused, either by the Commission or by parties who bring before the Commission unwarranted charges of bad character or of deception? 3) If there are abuses, how can they be checked? It may be said at the outset, without trying to prefigure any recommendations in conclusion, that there appear to be two forms of excessive concern with character and candor. The first is a tendency of parties, in hard-fought comparative proceedings, to dredge up remote and far-fetched charges of any conceivable kind of wrongdoing. The second, in which the Commission has taken the lead, is to make questionable inquiries about radical or subversive political associations. Examples of these practices will emerge from the discussion that follows

Consolidation causes little austerity

There is a widespread view that reducing national debts and deficits, or “consolidating” them, causes austerity or would hinder the recovery. The reality is that reducing structural debts and deficits and “stimulus debts” is easily done without any significant deflationary effects. In contrast, stimulus deficits cannot be reduced in that they are required to deal with recessions, thought they can perfectly well accumulate as extra monetary base rather than as extra debt. Money for the above debt and deficit reduction can be obtained from raised taxes and/or public spending cuts, while making good the deflationary effect of the latter with quantitative easing. As long as the deflationary effect of the former equals the stimulatory effect of the latter, there is little net effect on GDP, aggregate employment and so on. Meanwhile debts or deficits are reduced.consolidation; debt; deficit; austerity; stimulus

The Infrastructure and Other Costs of Immigration

Since 2002, the British Government department responsible for immigration, the Home Office, has claimed immigrants pay £2-5bn more in tax than they withdraw from the public purse. The workings behind this figure omit the cost of the additional infrastructure investments that immigrants necessitate (no small omission). The conventional wisdom is that funding government owned assets is a burden on the community at large, whereas funding private sector business assets is not. However the distinction between public and private sectors is artificial. Thus funding the private sector investments is just as much a burden on the community as funding the public sector. Thus it is the community at large funds the additional private sector business assets that immigrants necessitate. The important distinction is not between public and private sector assets, but between what might be called “communally used” assets (public and private) and assets which only one person or family benefits from, of which housing is much the most important. That is, the community at large does not pay for immigrants’ housing: immigrants themselves do. Assets other than housing in the UK amount to about £30,000 per head. The investment burden on the community is around double this because the typical immigrant has one child shortly after arriving. Immigrants do eventually pay this back – after about a generation. But by that time interest on the debt (which is not paid back) resembles the debt itself. Having arrived at a figure for the investment burden that immigrants impose, there is then the question as to what effect this has on the overall contribution that immigrants make, or burden that they impose. Answering this question involves answering a number of subsidiary questions about what can and cannot be debited to immigration. The four main subsidiary questions are thus. 1. Should the cost of educating immigrants’ children (£7.6bn a year) be attributed to immigration? The Home Office, Migrationwatch and others have disagreed on this for some time. It is shown that Migrationwatch is right: these educational costs should be attributed to immigration. 2. In past years, some Government current spending (as opposed to capital spending) was financed by increasing the national debt. Are immigrants (who have not benefited from this spending) effectively paying interest on this part of the national debt? If so, this would be unfair. It is shown that immigrants are not in fact paying for this past current spending. 3. Several studies have recently claimed that immigrants reduce interest rates. These studies all make the same mistake: they assume that interest rate reductions are the only weapon that governments have to raise demand with a view to employing extra workers (immigrants). In fact it is an expansion of the monetary base over the decades and centuries which has created the extra demand that immigrants necessitate. Moreover, interest rates have to rise a finite amount in reaction to immigration because someone somewhere has to forgo consumption to fund the additional investments that immigrants necessitate. 4. Do remittances reduce real incomes for natives? It is concluded that they do. The final figure for the cost imposed on UK natives by immigrants (about £12bn a year) is tentative, first because quantifying the variables that produce the £12bn is more informed guesswork than accurate measurement. Second, some of the official figures on which the estimate is based could be inaccurate. For example, there is evidence that the official figure for the total value of all assets in the UK could have been underestimated by 100% or more; and the real figure for remittances could conceivably be ten times the official figure. In short the cost imposed on UK natives by immigrants could easily be half or double the above £12bn.Immigration, infrastructure, cost, Musgrave, Migrationwatch, IPPR, Home Office, immigrants, migration, education, children, interest rates, remittances

Monetary and fiscal policy should be merged, which in turn changes the role of central banks

Keeping monetary and fiscal policy separate causes economic distortions, thus the two should be merged. That is, in a recession for example, the government and central bank should simply spend more (and/or collect less tax), and fund the latter from new or “printed” money. Merging monetary and fiscal policy necessitates a different relationship or split of responsibilities as between governments and central banks, but this is not a big problem. Plus the new relationship dispenses with an illogical element in the current typical relationship, namely that both central bank and government influence aggregate demand.fiscal policy: monetary policy: distortions: Abba Lerner: central banks: national debt: modern monetary theory: functional finance

The flaws in Keynsian borrow and spend

Borrow and spend is a policy with several weaknesses. 1, it involves government borrowing something, that is money, which government can create in limitless quantities any time. 2, the “borrow” part of borrow and spend is deflationary: the opposite of the desired effect. 3, borrow and spend may result in interest rate increases and crowding out. To get round this, governments print extra money and buy back government securities. This is a charade: governments here are engaged in “print and spend” while pretending to effect “borrow and spend”. 4, when borrowings are paid back, the initial reflationary effect is reversed, thus borrow and spend does not have a permanent effect, whereas print and spend does. 5, one of the ways that borrow and spend works is that it supplies the private sector with additional assets (bonds which pay interest). This reduces “paradox of thrift” unemployment. But the private sector actually NEEDS or WANTS these assets, thus there is no need to pay interest to induce the recipients to accept those assets. Put another way, governments should issue zero interest bonds (i.e. cash) not interest paying bonds. 6, Borrow and spend expands the national debt, some of which will be held by foreigners. Paying interest to foreigners when no interest needs to be paid makes even less sense than paying such interest to natives. For the purposes of influencing unemployment and inflation, print and spend is a superior policy to adjusting interest rates because the latter is distortionary.Keynes; borrow and spend; national debt; government borrowing; print money; interest rates;

The CLT Analogue for Cyclic Urns

A cyclic urn is an urn model for balls of types $0,\ldots,m-1$ where in each draw the ball drawn, say of type $j$, is returned to the urn together with a new ball of type $j+1 \mod m$. The case $m=2$ is the well-known Friedman urn. The composition vector, i.e., the vector of the numbers of balls of each type after $n$ steps is, after normalization, known to be asymptotically normal for $2\le m\le 6$. For $m\ge 7$ the normalized composition vector does not converge. However, there is an almost sure approximation by a periodic random vector. In this paper the asymptotic fluctuations around this periodic random vector are identified. We show that these fluctuations are asymptotically normal for all $m\ge 7$. However, they are of maximal dimension $m-1$ only when $6$ does not divide $m$. For $m$ being a multiple of $6$ the fluctuations are supported by a two-dimensional subspace.Comment: Extended abstract to be replaced later by a full versio

Pensioners' travel concessions - a misallocation of resources

Everyone has a soft spot for pensioners. This probably explains most peoples’ unquestioning approval of pensioners’ travel concessions. However, it is argued here that concessions do not make sense because pensioners would be better off with the cash equivalent of their concessions. Concessions involve inefficiencies of which the following are the main ones. First, there are good arguments for some subsidies (e.g. health and education). These arguments do not apply well to pensioner travel. For example in the case of health, many people in the absence of the National Health Service would face sudden large bills for medical treatment. In contrast, the bill for essential travel, like going to the shops, is a predictable and modest weekly expense of the same order as the weekly cost of food ( for which pensioners are not given concessions ). Second, about three quarters of the money spent on concessions is wasted in that it goes on transporting those who could afford the full fare or who are on non-essential journeys. In contrast, under a no concession scenario only about a quarter of the expenditure is wasted. Also, concessions are a poor means of supplying transport facilities to pensioners since about a third are not well served by public transport. In contrast, under a no concessions scenario, virtually all less well off pensioners get “transport subsidy money” since this money is contained in an increased state pension. Under a no concessions scenario, pensioners can spend their “subsidy money” on for example home delivery of groceries, taxi trips or subsidising relatives’ car running costs where the latter do the shopping. Fourth, social exclusion is often used to justify concessions. It is shown that abolishing concessions, far from increasing social exclusion, might even reduce it.pensioners; travel; fares; concessions; concessionary; inefficient; waste; bureaucracy

Estimation of gravitational acceleration with quantum optical interferometers

The precise estimation of the gravitational acceleration is important for various disciplines. We consider making such an estimation using quantum optics. A Mach-Zehnder interferometer in an "optical fountain" type arrangement is considered and used to define a standard quantum limit for estimating the gravitational acceleration. We use an approach based on quantum field theory on a curved, Schwarzschild metric background to calculate the coupling between the gravitational field and the optical signal. The analysis is extended to include the injection of a squeezed vacuum to the Mach-Zehnder arrangement and also to consider an active, two-mode SU(1,1) interferometer in a similar arrangement. When detection loss is larger than $8\%$, the SU(1,1) interferometer shows an advantage over the MZ interferometer with single-mode squeezing input. The proposed system is based on current technology and could be used to examine the intersection of quantum theory and general relativity as well as for possible applications.Comment: 9 pages, 5 figure