I am writing this in iPad and it is very difficult to type in. Not only keyboard is small, but also it is difcult to move around in the screen. So I have too many typos.
I do not think I will use the iPad for the blog so much.
As some one said, iPad is for infant. The best thing about iPad is quiet and energy efficient. I am just transforming it into a decent tool. I will elaborate on this more later.
It is very difficult to transform iPad to a more useful tool. This typesetting is so limiting. Getting a key board will help the problem but I do not why they can put full key board. I think there is a plenty of space.
But this wordpresss application is really nice. I can write a blog with this but it is very slow and typo prone.
To be honest, the setting was boring. Bad audio?? He is an excellent and friendly prof.
Prepare for the risk: Real conservatives ignoring their own principles
A terrific op-ed in WashPost from CAP’s Bracken Hendricks: I stopped reading the WP long time ago but from time to time it surprises me in a good way. Hope more people wake up and listen to him. Japan should do more on alternative energy stuffs.
The best science available suggests that without taking action to fundamentally change how we produce and use energy, we could see temperatures rise 9 to 11 degrees Fahrenheit over much of the United States by 2090. These estimates have sometimes been called high-end predictions, but the corresponding low-end forecasts assume we will rally as a country to shift course. That hasn’t happened, so the worst case must become our best guess….
Today’s conservatives would do well to start thinking more like military planners, reexamining the risks inherent in their strategy. If, instead, newly elected Republicans do nothing, they will doom us all to bigger government interventions and a large dose of suffering – a reckless choice that’s anything but conservative.
Few causes unite the conservatives of the newly elected 112th Congress as unanimously as their opposition to government action on climate change. In September, the Center for American Progress Action Fund surveyed Republican candidates in congressional and gubernatorial races and found that nearly all disputed the scientific consensus on global warming, and none supported measures to mitigate it. For example, Robert Hurt, who won Tom Perriello’s House seat in Virginia, says clean-energy legislation would fail to “do anything except harm people.” The tea party’s “Contract From America” calls proposed climate policies “costly new regulations that would increase unemployment, raise consumer prices, and weaken the nation’s global competitiveness with virtually no impact on global temperatures.” Even conservatives who once argued for action on climate change, such as as Sen. John McCain (Ariz.) and Rep. Mark Kirk (Ill.), have run for cover. But it’s conservatives who should fear climate change the most. To put it simply, if you hate big government, try global warming on for size. Many conservatives say they oppose clean-energy policies because they want to keep government off our backs. But they have it exactly backward. Doing nothing will set our country on a course toward narrower choices for businesses and individuals, along with an expanded role for government. When catastrophe strikes – and yes, the science is quite solid that it will – it will be the feds who are left conducting triage. My economic views are progressive, and I think government has an important role in tackling big problems. But I admire many cherished conservative values, from personal responsibility to thrift to accountability, and I worry that conservatives’ lock-step posture on climate change is seriously out of step with their professed priorities. A strong defense of our national interests, rigorous cost-benefit analysis, fiscal discipline and the ability to avoid unnecessary intrusions into personal liberty will all be seriously compromised in a world marked by climate change. In fact, far from being conservative, the Republican stance on global warming shows a stunning appetite for risk. When faced with uncertainty and the possibility of costly outcomes, smart businessmen buy insurance, reduce their downside exposure and protect their assets. When confronted with a disease outbreak of unknown proportions, front-line public health workers get busy producing vaccines, pre-positioning supplies and tracking pathogens. And when military planners assess an enemy, they get ready for a worst-case encounter. When it comes to climate change, conservatives are doing none of this. Instead, they are recklessly betting the farm on a single, best-case scenario: That the scientific consensus about global warming will turn out to be wrong. This is bad risk management and an irresponsible way to run anything, whether a business, an economy or a planet.
A new mechanism for generating broadband pulsar-like polarization
(Submitted on 2 Mar 2009)
Abstract: Observational data imply the presence of superluminal electric currents in pulsar magnetospheres. Such sources are not inconsistent with special relativity; they have already been created in the laboratory.
Here we describe the distinctive features of the radiation beam that is generated by a rotating superluminal source and show that (i) it consists of subbeams that are narrower the farther the observer is from the source: subbeams whose intensities decay as 1/R instead of 1/R^2 with distance (R),
(ii) the fields of its subbeams are characterized by three concurrent polarization modes: two modes that are ‘orthogonal’ and a third mode whose position angle swings across the subbeam bridging those of the other two,
(iii) its overall beam consists of an incoherent superposition of such coherent subbeams and has an intensity profile that reflects the azimuthal distribution of the contributing part of the source (the part of the source that approaches the observer with the speed of light and zero acceleration),
(iv) its spectrum (the superluminal counterpart of synchrotron spectrum) is broader than that of any other known emission and entails oscillations whose spacings and amplitudes respectively increase and decrease algebraically with increasing frequency,
(v) the degree of its mean polarization and the fraction of its linear polarization both increase with frequency beyond the frequency for which the observer falls within the Fresnel zone. We also compare these features with those of the radiation received from the Crab pulsar.