Saturday, May 18, 2013

Ask me something.

I realized I've never really tried having my readers just post questions for me.   Have at it!

90 comments:

Cesar Uliana said...

Hi prof. Natelson,

I have recently been wondering on the periodic table. How come we can talk about orbitals for complex nuclei, say copper, when there should exist a lot of correlation between electrons in different shells? The entaglement bewteen these electrons should prevent one fro meaningfully talk about orbitals, very naively. In other words, do we have a compelling explanation for madelung's rule from quantum mechanics? I understand techniques such as DFT can predict the correc electron density, but not the separate wave fucntions.

Excuse the verborragia,
Cesar Uliana

Doru Constantin said...

I noticed you've got a few publications in open journals. What do you think about open access publishing?

Doru Constantin
http://blitiri.blogspot.com/

Anonymous said...

Dear Prof. Natelson,

I am a fourth year Ph.D. student looking to apply for postdocs soon. I have thre papers in preparation, including one that was submitted. However, none have been published yet. I have presented my work at conferences and have gotten positive feedback on my results from fellow scientists.

Naively, it seems to me that the business of academia places a lot more emphasis on the number of papers one published than it does on the science that those papers are about.

This concerns me with regards to applying for postdocs, and eventually faculty positions. I feel like the job pressures would push me to think more about publishing ten 'average' papers a year, rather than publishing a few papers that I put a lot of effort into. This is especially true with the sequester coming up, and funding becoming ever more competitive.

Furthermore, I feel like I would be discouraged from taking risks or doing work that will not produce immediate publications. P.W. Anderson in his latest book, "More And Different", wrote about how if Schrodinger, Heisenberg and Dirac were assistant professors in modern America, they would never have been able to invent Wave Mechanics.

I guess my question is: am I being overly pessimistic? What advice would you give to young scientists concerned about the pressure to publish? Is it really a zero-sum game? I feel that a lot of young people have these concerns but do not articulate them.

Anzel said...

On a blog discussion here some months ago, you mentioned you were going to discuss what engineers need from freshman physics. Did you have any further thoughts on that?

Anonymous said...

What would you say has been the greatest moment in your scientific career so far and what was your worst/biggest failure?

Anonymous said...

What’s up with the story of the “memristor” – the so-called fourth fundamental circuit element?

Douglas Natelson said...

Thanks for the responses so far. Plenty of food for thought here.

Cesar, you're right that in some ways it's a miracle that the atomic orbital structure we learn about when solving the hydrogen atom for one electron is applicable for, e.g., uranium, with 92 electrons in an atomic-scale volume. It's the same main reason why the free electron picture works as well as it does for metals like aluminum and even gold. The Pauli exclusion principle leads to two consequences here. First, the kinetic energy tends to grow faster with increasing electron density than the interelectron interactions. Second, the requirement that the many-electron wavefunction be antisymmetric under exchange of any two electrons tends to keep the electrons comparatively far apart. It is impressive, though, isn't it!

Doru, I actually haven't published much in open access journals, but I try to put as much of my work as possible up on the arxiv. Open access is a great idea, but the current business model in many open access journals is a bit broken. I can't afford a relative thousands of dollars increase in publication costs per paper for the sake of open access. At the same time, putting a paper up on the arxiv costs me basically nothing and makes the work accessible to anyone with an internet connection.

Douglas Natelson said...

Anon@3:25, you're not alone in having these concerns. I do think that most good people are aware of the timescale for publication, for example - that your big work from your thesis may not be all the way into print when you're giving talks about it to land a postdoc. Regarding the risk vs reward aspects of scientific publishing these days, there is cause for concern, but the situation isn't as bad as, e.g., Anderson outlines, in my view. It is true that assistant professors in the US are under many pressures and have lots of demands on their time, compared to, e.g., Heisenberg at his academic start. It's a fair question to ask whether that environment is the best for iconoclastic geniuses. It is also true that in my view there is too much emphasis (particularly at the hiring stage, but also at the promotion stage) on the idea that Science and Nature papers are the end-all and be-all. It is not a zero-sum game, though, in the sense that someone else's success does not take away success from you. (Well, I suppose there is a little of that, in the sense that there are a fixed number of, e.g., Nature covers per year, but that's the exception rather than the rule.) The adage is, professors are hired on promise and tenured on accomplishment. While publications in good journals and citations are not perfect metrics, they're better than nothing. It would be extremely risky for a junior faculty member to spend all of their time pursuing a "homerun" project that would not result in publications for the first five years. (That would also not be good for the students working on it, by the way.) Part of being successful is having a portfolio of projects that produce some results along the way. Remember, even Andrew Wiles waited until he had tenure before he spent several years chasing Fermat. (I also think Anderson is exaggerating for effect. Heisenberg and Pauli were recognized early as off-scale genius prodigies. They would've done fine.) I am happy to talk more about this, by the way.

Anzel, I really should write a full post about this. In short, engineers should come away learning quantitative reasoning and the crucial ideas of approximations (how to make them, and when do the ones underlying their favorite formulas break down) and limiting cases. The stereotype of engineer undergrads as people who just want to memorize the right formula is not the way to end up with good engineers.

Anon@10:43, that's tricky. I've certainly had ideas that didn't pan out. We had to yank back the last paper I'd worked on as a grad student after it had been accepted (but prior to publication) in PRL because we realized (thanks to follow-up experiments by my successor in the lab) that our assumptions about one tricky piece of thermometry were breaking down just where things seemed to be getting interesting. On the success front, I'm very pleased with how the simultaneous Raman and electronic transport measurements have worked out, particularly as it has become clearer recently that in many ways we got lucky (with our particular choice of device shape, for example).

Anon@5:24, I've posted about this a couple of times here and here. Short version: good marketing, not as fundamental as the inductor or the capacitor, and the colloquial definition has broadened now to include all history-dependent electronic elements.

Anonymous said...

http://nanoscale.blogspot.ca/2013/03/aps-march-meeting-day-4-and-wrapup-for.html

"I did make it to John Martinis' talk about whether materials are good enough to build a superconducting quantum computer. It sounds like there is cause for cautious optimism, but wow is it going to be a difficult engineering task"

What are the specific challenges?

Unknown said...

What is the spin Seebeck effect?

Anonymous said...

Doug-

I am wondering about your perspective on the recent purchase of a D-wave "quantum computer" by Google (and Lockheed).

Last I heard - this was a few years ago - these D-wave machines were a bit of a joke. As far as I know, the company has never proven that they work as true quantum computers.

So I was really surprised to see that well-respected companies actually spent hard-earned cash on the equipment. For Lockheed Martin, one plausible explanation is that they are really interested in the early patents behind these systems.

But do you really believe that D-wave is able to solve NP-complete optimization problems better than classical computers?

Thanks!

Anonymous said...

Does the so called multiscale modelling a credible field of study at this time or is it a simply an ad-hoc coupling of phenomenological models

Anonymous said...

I am concerned about the invasion of string theorists into the field of condensed matter. Can we expect anything positive from this development?

More recently, close connections between condensed matter problems and string theory have emerged. The AdS/CFT correspondence, discovered by string theorists, connects a string theory and gravity to a quantum field theory without gravity in one lower dimension. This correspondence has been applied to quantum condensed matter systems, revealing new insights into quantum phase transitions (transitions at zero temperature) and strongly correlated electron states.

Douglas Natelson said...

Anon@2:48 - From what I remember, there are serious engineering issues with device uniformity, control of oxide properties, and even things like optimized layout to minimize the numbers of wirebonds. Martinis et al. want to implement an error correction scheme based on surface codes, and like most such approaches requires more physical qubits than logical qubits. This makes the layout particularly challenging.

Unknown, the ordinary Seebeck effect is the creation of a voltage (through the buildup of a charge imbalance) due to a temperature difference. The spin Seebeck effect is, I believe, the buildup of a net spin imbalance across some structure due to a temperature difference across the structure. The energy dependence of the density of states (the breaking of particle-hole symmetry) is important in the Seebeck coefficient. Naively (meaning I haven't really looked at this), I'd guess that the spin splitting of the band structure in a ferromagnet could lead to a different Seebeck coefficient for the different spin species. Likewise, the presence of strong spin-orbit coupling should matter. Sorry - I haven't had time to read up on this.

Douglas Natelson said...

Anon@6:35, while I don't think of multiscale modeling as a discipline unto itself, it's a very important general problem. For example, right now there is no nice way even to do something relatively straightforward to state, like solve Maxwell's equations efficiently on length scales spanning from deep sub-wavelength to several wavelengths. That's even a simple case, solving one kind of problem across a large range of scales. Once you have to do, e.g., optical properties + electronic and heat transport across multiple intrinsic length scales, then things are very difficult. Describing that as ad hoc linking of models is rather pejorative. The people doing this right are not making ad hoc assumptions, but well-grounded ones.

Anon@6:45, if string-based math (and we can decide whether things like conformal field theory results are automatically stringy) lets people map hard strong-coupling (CM) problems onto simple weak-coupling (gravitational) analogs, then that's a good thing. However, it would be great if Subir Sachdev and the other practitioners of this would write a readable-for-non-field-theorists discussion of how these mappings work. Maybe such an article exists, but I haven't found it.

Anonymous said...

Here is a review article that Subir Sachdev wrote last year:

http://arxiv.org/abs/1108.1197

It's got some specialist stuff in there, but I found it to be the most helpful 'general' intro to AdS/CFT for condensed matter.

grumpy said...

would you care to speculate on the logn-term future of computing technology over the next century? What types of new devices might replace/augment the traditional transistor? For example, do you think photonic logic might be used at the nanoscale? Surface plasmons? Individual spins/molecules/atoms?

David Brown said...

Ray Kurzweil has conjectured that the full onset of the Technological Singularity will occur by the year 2045 C.E. What probability would you assign to the probability that Kurzweil's conjecture is correct? By the end of the year 2018 C.E. how many states in the U.S.A. do you think will have licensed Google's driverless automobiles?

Douglas Natelson said...

Grumpy, my best guess is, for mainstream computing applications over the next couple of decades, silicon all the way down (to a few nm critical feature size), followed by 3d integration and architecture advances to allow cooling in such geometries. Longer term, probably some kind of quantum computation in niche applications. A rise in optical interconnect technology, but right now I don't see nanoscale photonic logic happening any time soon.

David Brown, while I respect Kurzweil's contributions in computing (e.g., optical character recognition), on this topic frankly I think he's a bit around the bend. I'm a bit sci-fi fan, but the Singularity as envisioned by some just isn't something I worry about. I think the probability that the Singularity (I'd be curious for your precise definition - strong AI, mind uploading, ubiquitous molecular nanofab or at least 3d printing, a post-scarcity societ?) happens for a significant part of the world's population by 2045 is very very small. Less than 1%. Regarding driverless cars, at most one state (California), though I think you are going to see some serious irrationality about risk from the general public on this one. Wait until the first accident where a driverless car has a failure or design glitch and kills a pedestrian. It won't matter what the ordinary per-mile-driven accident rates are - there will be big-dollar lawsuits and a backlash. I do think driverless cars will happen eventually, but five years is way to fast.

Anonymous said...

I would like your opinion on the relationship between theorists and experimentalists in condensed matter.
It seems there exists a substantial divide.

http://condensedconcepts.blogspot.ca/2013/05/listen-to-experimentalists-sometimes.html#comment-form

Anonymous said...

F + P = C + 2 Gibbs
F + V = E + 2 Euler

Are these two equations the same thing? Is Gibbs’ degrees of Freedom, number of Phases, and Components related to Euler’s Faces, Vertices, and Edges?

Love,
Deeth Keynes-Neff

Anonymous said...

There are at least five linear transport laws, named after Ohm, Fick, Fourier, Darcy, and Newton. Newton’s Law is not F = ma, it is the transport of momentum across a velocity gradient. The laws have much in common. All of them go nonlinear if you try to go too fast. At low temperatures, Ohm’s Law and Darcy’s Law become supertransporters: something moves without a potential gradient.

In the old Engineering Library at Princeton, I read a speculation that cooled materials become supertransporters of Newtonian momentum, and for some materials super transport extends above room temperature. Consider the legs of your desk; they shrinketh not but they transporteth momentum. Gravity distorts telescope lenses less than a quarter wavelength of light during 100 years.

Later, I went back to the E-Quad library and couldn’t find the original reference.

Regards,
Que es, Dee

Anonymous said...

The second edition of Pitzer and Brewer’s rewrite of Lewis and Randall’s Thermodynamics lists on page 513 eight pairs of intensive and extensive properties. For each pair, the product of intensive times extensive has the units of energy. (Their list can be extended, how about E = mc2)

However, right after their list, Pitzer and Brewer had to punt. They don’t list magnetic properties; the intensive-extensive pair does not have the units of energy. The intensive SI Tesla seems OK. But the conventional extensive side of the pair has units of ampere meter. Their product is not energy. On the other hand, magnetic moment has the units of ampere (turns) times the area of the coil. That’s much more intuitive than ampere-meter and the product has the units of energy.

Would “Killer E&M” need to have its textbook rewritten?

Wasn’t Ken Pitzer the President of Rice?
BEE & AITCH

Anonymous said...

Here’s one from condensed matter:

The mineral pyrite, fool’s gold, has the formula FeS2. Pyrite recently turned up in primary lithium batteries. What are the valences of iron and sulfur in pyrite?

Enjoy,
Rox for Jacques

Anonymous said...

With some pain, in high-school chemistry we all learned to balance oxidation-reduction equations. Up for discussion is the rumor that anyone with a program that solves simultaneous linear equations can balance a redox reaction. It’s built into the TI-84 pocket calculator.

For an example, try balancing the equation for a mixture of ammonium nitrate and nitromethane (CH3NO2). You want to end up with only nitrogen gas, water vapor, and carbon dioxide. It’s not very nice, but that was the recipe for the Oklahoma City bomb.

Sincerely,
Born in Oklahoma City

Anonymous said...

Hi Doug,

I think I found the answer to my previous question about the D-wave news... Scott Aaronson has a very informative post about the "quantum annealer":

http://www.scottaaronson.com/blog/?p=1400

Vive l'internet!

David Brown said...

@Doug replying to Grumpy & David Brown: I hope Kurzweil is wrong, but I am not sure his prediction is nothing to worry about. My definition of the full onset of the Singularity is when (and if) the net AI IQ exceeds the sum of all the human IQs by a factor of at least one billion. The human brain might have about 100 billion neurons and 100 trillion synapses. The nervous system of the nematode C. elegans might have about 300 neurons. Thus my definition is roughly when (and if) the net AI IQ makes the net human IQ seem like a nematode level. (Bad news if it happens)
http://www.singularityweblog.com/17-definitions-of-the-technological-singularity/
http://en.wikipedia.org/wiki/Google_driverless_car
http://www.ted.com/talks/sebastian_thrun_google_s_driverless_car.html According to Wikipedia, Nevada, Florida, and California have already licensed the testing of Google's driverless automobiles on public streets. One such car has driven across the Golden Gate Bridge in ordinary traffic.

Douglas Natelson said...

Anon re: Dwave - sorry - somehow blogger ate my original response to you and I didn't notice. Short version: I basically agree w/ Scott Aaronson on most things. Dwave's approach to publicity doesn't sit terribly well with me, though I understand it. Just because Google and LMCO spend money on something doesn't automatically make it correct, and both companies are willing to look at long-shot investment as a form of insurance.

Anon@4:25pm - There is a natural symbiosis between theorists and experimentalists. The best experimentalists understand a lot of theory, and know when to worry about quantitative precision vs. qualitative scaling; the best theorists understand quite a bit about relevant experiments.

Douglas Natelson said...

Anon 8:57-9:13:
1) No, I don't think there's a deep connection between the Gibbs phase rule and geometric solids, though I'm prepared to learn if there is something deep there.
2) Don't know what you're asking here. The "laws" you mention (except Newton) are all related to linear-order solutions to transport-like equations. I suppose you could say that a "rigid body" is a super-tranporter of momentum, but I don't see how that's a useful way to think about things.
3) Magnetic units are awful, but if you properly treat magnetic work self-consistently you can find appropriate thermodynamic relations. See here: http://cdn.intechopen.com/pdfs/33437/InTech-Thermodynamics_of_electric_and_magnetic_systems.pdf
Yes, Pitzer was president at Rice, before my time.
4) Wikipedia is your friend: http://en.wikipedia.org/wiki/Pyrite
5) Again, not sure what you're asking, though this comment sounds like Uncle Al a bit.

Anonymous said...

Anon 9:01 - Be careful. Science is pretty sloppy with the word "Law". When I teach freshman physics, I call Ohm's Law "Ohm's observation that was approximately true for materials of interest in 1827". Ohm also has a law of acoustics that is widely held to be untrue.

Anonymous said...

Do you have a personal list of the top 10 outstanding theoretical problems to consider in condensed matter?

Anonymous said...

Is there any in depth books on the subtle issues of experimentation at the microscopic and mesoscopic scales

Anonymous said...

Doug- Thanks for your response to my question about D-wave. Knowing how fragile these nanoscale circuits can be, I wonder what will happen when one of the Josephson junctions of their fancy computer fails, and the $10M machine stops "annealing". I hope they have a good warranty!

Curious said...

Dear Prof. Natelson,

Could you please comment on those recent experiments on MoS2 films? I read that MoS2 may be better than graphene for electronics applications because it has a large bandgap, while graphene does not.

Does MoS2 have drawbacks that might make its large-scale use problematic? Do you think one could achieve current densities in planar MoS2 that could compete with Si FinFETs?

And, lastly, is it an interesting material from the physicist's point of view?

Best regards,

Douglas Natelson said...

Anon@4:40 - Perhaps that's a better question to ask a theorist. I think there are plenty of problems out there (e.g., general mechanism of high-Tc; computationally better ways to deal w/ exchange/correlations in DFT; strong coupling problems; quantum systems out of equilibrium).

Anon@12:58, I don't know of a book that really takes the experimental perspective like that. There are a couple of very nice books about low temperature experiments (Pobell; Richardson and Smith), but if there's a meso/nano one, I don't know it. I have a colleague yesterday who was bemoaning even the lack of a really definitive work about the experimental details of scanning tunneling spectroscopy.

Curious, MoS2 and other related dichalcogenides are very interesting. Spin orbit physics, correlation effects like charge density waves, the ability to intercalate things between the layers - all of these make these materials exciting. As for large scale use, I've said before there is an enormous economic inertia behind silicon. Given that growth of high quality, large-area MoS2 and the technology for making complementary devices on it are both rather immature, it seems unlikely that it will be a major player in conventional electronics applications for a long, long time. Still, it's early days yet.

Anonymous said...

Cynical question, lets say i'm an amateur who has studied all the volumes of the Course of Theoretical Physics:

http://en.wikipedia.org/wiki/Course_of_Theoretical_Physics

and wish to study Cell Biology. am i actually missing in regards to a proper grounding in physics due to recent research?

Douglas Natelson said...

Anon@3:24, well, the last revisions to Landau and Lifschitz are about fifty years in the past as far as I know. That means that it omits many things that have become very useful in modern experimental biology. That being said, LL is a tremendous set of books, and if you've really mastered it, you should be in great shape for a quantitative approach to many disciplines.

Anonymous said...

You have addressed molecular electronics so I will ask 'what is the state of superconductors?'

Anonymous said...

http://en.wikipedia.org/wiki/Quantum_biology

The physics department should get funds for this?

Anwar Fazil said...

Online Marketing is the Best way to increase your income and Get online visitors or Customer on your company. Many Marketing Way like Facebook Marketing, Website Marketing, SMS Marketing, Products Marketing and Social Media Marketing such as Facebook Likes, Twitter Follow, Youtube Views and Much More International Advertising Systems, Just Visit
HotCurrentAffairs.com

saleem mohd. said...

Free Social Media Marketing where Every thing will be Free, Facebook Likes, Twitter Followers, Twitter Tweets, Twitter Re-Tweets, Twitter Favorites, Google Plus Followers, StumbleUpon Followers, Youtube Views, Youtube Likes, Youtube Subsribes, Pinterest Followers, Pinterest Likes, Pinterest PinIt, Free Website Visitors.
Just Join now and Free Increase your Social Media Networks.
GetLikeFast.com

saleem mohd. said...

Lols and Gags, Lol Pictures, Funny Pictures, Lol is the Laugh out of Laugh where you can Fun Unlimited and Laughing Unlimited. Visit the Best Lol Network Ever, where you can every thing is lol and Funny, Troll Images, Funny Vidoes, Prank Peoples, Funny Peoples, Prank Images, Fail Pictures, Epic Pictures and Much More Fun and Entertainment
lolsgag.com

kamran shiakh said...

Lols Gag is the the Best Lol Network Ever, where you can every thing is lol and Funny, Troll Images, Funny Vidoes, Prank Peoples, Funny Peoples, Prank Images, Fail Pictures, Epic Pictures, Epic Videos, Prank Videos, Fail Videos and Much More Fun and Entertainment, Lols and Gags, Lol Pictures, Lol Videos, Funny Pictures, Lol is the Laugh out of Laugh where you can Fun Unlimited and Laughing Unlimited.
lolsgag.com

kamran shiakh said...

Lols Gag is the the Best Lol Network Ever, where you can every thing is lol and Funny, Troll Images, Funny Vidoes, Prank Peoples, Funny Peoples, Prank Images, Fail Pictures, Epic Pictures, Epic Videos, Prank Videos, Fail Videos and Much More Fun and Entertainment, Lols and Gags, Lol Pictures, Lol Videos, Funny Pictures, Lol is the Laugh out of Laugh where you can Fun Unlimited and Laughing Unlimited.
lolsgag.com

hasnain raza said...

Lols Gag is the the Best Lol Network Ever, where you can every thing is lol and Funny, Troll Images, Prank Peoples, Funny Peoples, funny planet, funny facts, funny cartoons, funny movies pics, iphone funny, funny jokes, Prank Images, Fail Pictures, Epic Pictures, Lols and Gags, Lol Pictures, Funny Pictures, Lol is the Laugh out of Laugh where you can Fun Unlimited and Laughing Unlimited.
lolsgag.com

Brad maddox said...

Upcoming Latest cars and vehicles, Latest Mazda Models, Racing Cars, International Sport Cars, Concept Cars, PS-Pod, Strange Vehicles, Nissan, Royce Corniche, Ford Concept Cars, Strange Vehicles, Mercedes and More Sport Cars and Vehicles with Pictures and Info
WorldLatestVehicles.com

hammad sohail said...

Forex Affaris.. Latest Currency news updates, latest forex trading business updates, trading updates, forex trading latest news, forex brokers directory, forex brokers list, Dollars news affairs, Stock Markets, stock market news, stock market analysis, technology news, international forex markets, international forex business news and all updates about Forex Trading
ForexAffairs.Com

Brad maddox said...

Trading is the Best Business Ever in the World.. All News updates about Forex Business, Latest Currency news updates, latest forex trading business updates, trading updates, forex trading latest news, forex brokers directory, forex brokers list, Dollars news affairs, Stock Markets, stock market news, stock market analysis, technology news, international forex markets, international forex business news and all updates about Forex Trading
ForexAffairs.Com

tahir shoukat said...

Best Business Plan without any work from Home
Daily Earning 40 Dollars and Monthly earning 1200 Dollars Guaranteed with Payment Proofs
Plan 1, You can Invest as low as 1 Dollar to 100 Dollars and Get Daily profit of 2.50% for 90 Days.
www.hotfxearnings.com

moosa asim said...

Make Money Online is very easy now, In Internet system we have now best earning system without any work, Just Invest some Money into your Business and Make Perfect Life time Earnings with this Business.
Join Now for Make Perfect Business and Earn Money online from home.
www.hotfxearnings.com

abdullah asim said...

Latest cars and vehicles, Latest Mazda Models, Racing Cars, International Sport Cars, Concept Cars, PS-Pod, Strange Vehicles, Nissan, Royce Corniche, Ford Concept Cars, Strange Vehicles, Mercedes and More Sport Cars and Vehicles with Pictures and Info
WorldLatestVehicles.blogspot.com

muhammad asim said...

Photoshop Fail Peoples in this Network... Fail Prank Peoples, Fail Videos, Fail Pictures, Troll Images, Prank Peoples, Funny Peoples, funny planet, funny facts, funny cartoons, funny movies pics, iphone funny, funny jokes, Prank Images, Fail Pictures, Epic Pictures, Lols and Gags, Lol Pictures, Funny Pictures, Lol is the Laugh out of Laugh where you can Fun Unlimited and Laughing Unlimited.
lolsgag.com

tahir shoukat said...

Funny Entertainment or Lol Pictures with full of Fun... Entertainment Articles, Entertainment News, Entertainment Pictures, Bollywood, Hollywood and Lollywood Pictures and Videos, Entertainment Latest updates, Hot Entertainment News and Pictures Funny Entertainment Pictures, lol Pictures, Funny Pictures and Much More Fun Only on 1 Current Affairs Network
hotcurrentaffairs.com

samad abbas said...

Top Ten Classified Website List, Pakistani Classified Sites, USA Classifieds, Indian Classifieds, Entertainment Articles, Entertainment News, Entertainment Pictures, Bollywood, Hollywood and Lollywood Pictures and Videos, Entertainment Latest updates, Hot Entertainment News and Pictures Funny Entertainment Pictures, lol Pictures, Funny Pictures and every thing you want...
www.hotcurrentaffairs.com

nida khan said...

Funny Facts on this Website, Every thing will be funny Troll Images, Prank Peoples, Funny Peoples, funny planet, funny facts, funny cartoons, funny movies pics, iphone funny, funny jokes, Prank Images, Fail Pictures, Epic Pictures, Lols and Gags
LolsGag.Blogspot.Com

samad abbas said...

Troll Images, Prank Peoples, Funny Peoples, funny planet, funny facts, funny cartoons, funny movies pics, iphone funny, funny jokes, Prank Images, Fail Pictures, Epic Pictures, Lols and Gags, Lol Pictures, Funny Pictures, Lol is the Laugh out of Laugh where you can Fun Unlimited and Laughing Unlimited.
LolsGag.Blogspot.Com

daniyal raza said...

Genuines Works of Data Entry, Copy Pasting, Add Posting, Clicking, Web Surfing, Website Visiting, Article Sharing, Data Sharing, Google Business Plan and Much More Business Plans
www.jobzcorner.com

samad abbas said...

Genuines Works of Data Entry, Copy Pasting, Facebook Posting, Add Posting, Link Posting, Clicking, Web Surfing, Website Visiting, Article Sharing, Data Sharing, Google Business Plan and Much More Business Plans.
www.onlinecornerz.ocm

Hassan Asim said...

Genuines Works of Data Entry, Copy Pasting, Facebook Posting, Add Posting, Link Posting, Clicking, Web Surfing, Website Visiting, Article Sharing, Data Sharing, Google Business Plan and Much More Business Plans.
www.onlinecornerz.ocm

Hassan Asim said...

Funny Facts on this Website, Every thing will be funny Troll Images, Prank Peoples, Funny Peoples, funny planet, funny facts, funny cartoons, funny movies pics, iphone funny, funny jokes, Prank Images, Fail Pictures, Epic Pictures, Lols and Gags
LolsGag.Blogspot.Com

adnan khan said...

Lols Gag is the the Best Lol Network Ever, where you can every thing is lol and Funny, Troll Images, Prank Peoples, Funny Peoples, funny planet, funny facts, funny cartoons, funny movies pics, iphone funny, funny jokes, Prank Images, Fail Pictures, Epic Pictures, Lols and Gags, Lol Pictures, Funny Pictures, Lol is the Laugh out of Laugh where you can Fun Unlimited and Laughing Unlimited.
lolsgag.com

hasnain raza said...

Searching for some new Facebook Covers Online...??? Here is the best for Fb Covers, All type of Covers, Ramadan, Eid, Festivals, Exhibitation, Celebrities and Much More
UniqueFbCovers.Com

ali said...

Find Best Online Home based Jobs
www.jobzcorner.com

Rehan Ahmed said...

Online Jobs, work from home, part time online jobs, just join any where in the world
Fb.com/JobzCornerz
JobzCorner.com

Jason Clark said...

For All Latest Hot Current Affairs
www.hotcurrentaffairs.com

Rashid Omer said...

Get Hourly Profit with best business plans ever, Join Now
AllTimeProfit.com

Ahsan Afsar said...

World Most Popular and Top Amazing Speedy Cars
TopAmazingCars.BlogSpot.Com

Danish Here said...

Get Part Time Data Entry, Copy Pasting, Clicking, Facebook and Article Sharing Jobs from Home
Fb.com/JobzCornerz
JobzCorner.com

adnan khan said...

Find Best online home based jobs, data entry, copy pasting, facebook and clicking jobs
JobzCorner.com

najma love said...

Join for Best Online Home based Jobs
JobzCorner

Ahsan Afsar said...

Online Jobs of Data Entry and Copy Pasting with Jobz Corner
JobzCorner.com

Syed Kazim Ali said...

Online Business with hourly profit, Just Invest and Rest
AllTimeProfit.com

najma love said...

Earn with Best Business Plans ever where you can make money online from home without any work, just invest with PayPal and get Double profit within a week
AllTimeProfit.com

Jason Clark said...

For Lol and Funny Pictures online, download any picture any time just for laugh lols
www.lolsgag.com

Asif Ali said...

Find best Online Jobs on Facebook...
JobzCorner

Rehan Ahmed said...

Online Business as low as $1, Join Now and Get Best Business from Home without any work
AllTimeProfit.com

Syed Kazim Ali said...

Online Business with hourly profit, Just Invest and Rest
AllTimeProfit.com

Faheem Zia said...

Find Online Jobs ever in the World
JobzCorner.com

Faheem Zia said...

Find Online Jobs ever in the World
JobzCorner.com

Faheem Zia said...

Find Online Jobs ever in the World
JobzCorner.com

najma love said...

Get More News about Politicians of Pakistan, visit our this page for more details, President Pasban Pakistan Altaf Shakoor Official
AltafShakoorOfficial

najma love said...

Get More News about Politicians of Pakistan, visit our this page for more details, President Pasban Pakistan Altaf Shakoor Official
AltafShakoorOfficial

Rehan Ahmed said...

Funny and Lol Pictures only on this online network in the world, online gags
LolsGag.com

Danish Here said...

This business is best for you on house earnings, just invest some money and get double profit within a week, join now
Fb.com/groups/AlltimeProfit
alltimeprofit.com

Rehan Ahmed said...

Get Facebook Likes on your fb page, likes on your facebook pictures, followers on your facebook id, shares of your facebook posts, every thing is available here, visit for more details
www.jobzcorner.com

najma love said...

Want to Make Website or Software...? Any Type of Website and Software and Desktop and Web Based Applications.
Want to Make Now, Just Contact us at Skype
Skype : Jobz.Corner

Rehan Ahmed said...

Get Free Online Jobs from home, best ad clicking work, join now
JobzCorner.com/FreeEarning

Ahsan Afsar said...

Find best business plan from home without any work, just invest $1 and get 120% Total Profit within a week
EarningsClub.Com

Danish Here said...

Earning is on the way for you, any time get income, best hourly stable plans
EarningsClub.com

Asif Ali said...

Best Free Earning Website where you can earn with just playing games and view some ads, join now
PaidVerts.com