Ruhul Kabir RizviBangladesh Nationalist Party (BNP) on Saturday demanded resignation of road transport and bridges minister Obaidul Quader for his ‘failure’ to ensure smooth journeys for holidaymakers ahead of Eid-ul-Fitr.”The sufferings the home-goers facing are indescribable. The minister [Quader] has utterly failed… we think he is mainly responsible for the public sufferings, and he should step down,” said BNP senior joint secretary general Ruhul Kabir Rizvi Ahmed.He came up with remarks at a press conference at BNP’s Naya Paltan central office.The BNP leader said people are going through immense sufferings on their way to home due to rundown highways, mismanagement, exorbitant transport fares and unabated extortion on roads.Referring to Quader’s comment that people are going home smoothly without facing any tailback, Rizvi said the minister made the remark to hide his failures.”He also mocked the sufferers with his comment. We think he’s resorting to such falsehood only to protect his cabinet membership by appeasing the prime minister.”He alleged that the government has continued repression on BNP leaders and activists by implicating them in ‘false and fabricated’ cases. “Many of our leaders and activists have long been on the run to avoid harassment and repressive acts. They can’t return their home even on the occasion Eid.”The BNP leader criticised prime minister Sheikh Hasina for repeatedly seeking vote for her party enjoying government facilities. “The prime minister again sought vote for her party yesterday [Friday]. Seeking vote for a party holding the important post of prime minister is a complete violation of the election code of conduct.”He alleged that the prime minister has been begging votes desperately as she has realised that people will not cast their votes for Bangladesh Awami League for snatching their voting rights.Rizvi Ahmed also said the AL leaders and activists have got scared realising that they will suffer a massive debacle in the next polls.
Explore further “I remember waiting in line to scan my ticket inside the terminal, I believe it was at the Seattle airport,” Steffen told PhysOrg.com. “I remember being quite disappointed when I saw how long the second line was – the one at the entrance to the airplane – and how slowly it moved. . . . That’s when I thought that there had to be a better way to get people onto the airplane than the one that was being employed. I didn’t have the time to work on it right then, so I brooded over it for almost 18 months. Last year, I decided that I either needed to solve the problem or stop thinking about it.”In his analysis, Steffen found that the worst method for boarding a plane is boarding from the front to the back, since passengers have to wait and step over each other to get to their seats. As he explains in a paper submitted to the Journal of Air Transport Management, conventional wisdom suggests that boarding in a manner opposite to the slowest method seems like it should be the fastest method. Quite unexpectedly, then, Steffen found that the common back-to-front boarding method is actually the second worst method possible, only slightly better than boarding front to back.“I was certain that the worst way to load the airplane was from front to back, so I ran my simulation in that configuration first to set a baseline,” Steffen said. “I was also somewhat convinced that the optimal way would be from back to front or something like it. I half expected to find that back-to-front loading is several times faster than front-to-back. Had that been true, I was prepared to run the two simulations, see how much faster it was, be satisfied, and put it aside. When the results were almost identical, I first thought that there was a bug in my code. Once I was convinced that my code worked properly, I realized that the problem was more interesting than I had anticipated, and I got more serious about it.”Using a combination of a Monte Carlo optimization algorithm and intuition, Steffen determined an optimal boarding method, which could make boarding go 4 to 10 times faster than the worst method, depending on the size of the plane. In the optimal method, passengers would board 10 at a time in every other row (since loading luggage requires about two aisles of space). This way, passengers could always be boarding luggage or sitting in their seats, rather than waiting in the aisle, as in the two previous methods. Citation: The Best Way to Board a Plane (2008, February 14) retrieved 18 August 2019 from https://phys.org/news/2008-02-board-plane.html Tackling the forensic unknowns of 3-D-printed firearms This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. A Boeing 747 passenger plane. Most airlines board passengers the same way, first filling the seats in the back of the plane, and then moving to the front. After a recent experience boarding a plane in this manner, Fermilab physicist Jason Steffen wondered if there might be a better way. So, in the midst of studying gravitation and axion-like particles, Steffen took a short break to investigate an optimal boarding method for airline passengers. However, Steffen also acknowledged that the optimal method might not be practical, since passengers who sit next to each other often travel together, and prefer to board together. He proposed a modified version, where passengers board in blocks of three consecutive seats on one side of the plane in every other row. In this strategy, there would be four boarding groups, with passengers in the same row on the same side boarding together. This method provided a decent middle ground, as it was twice as slow as the optimal method, but twice as fast as the conventional method. Although getting passengers to line up in their correct groups might sound challenging, Steffen noted that Southwest Airlines has been experimenting with having its passengers line up in numerical order – so the logistics wouldn’t be inconceivable.Steffen also identified several other boarding strategies with results superior to the conventional method. Contrary to our tendency for order, even completely random boarding proved to be a good alternative. In fact, random boarding was nearly as fast as the modified optimal method. Plus, by its very nature, it has the advantage of not requiring airline attendants to organize boarding passengers in any way. And the random result also shows that, when passengers board out of order in the other strategies, the results will still be better than the conventional boarding method.The main advantage of the alternative boarding methods is that they allow several passengers to load their overhead luggage simultaneously, which Steffen identified as the largest factor in determining boarding time. By spreading the passengers throughout the airplane instead of concentrating them together, more passengers could load their luggage at once. Steffen noted that, although he has recently heard of other boarding optimization studies, his analysis uses a unique method and is the first to generate this specific optimization strategy.“I think that the biggest challenge to implementing one of these methods is cracking into the industry,” he said. “Right now, I have a model where the parameters need to be calibrated with data. But that would require an investment from an airline company or manufacturer. While I could be wrong, I doubt that when an airline company needs to study an issue like this one that their first thought is, “Let’s go talk to a physicist” (followed by, “Look, here’s one that’s studied axions and extrasolar planets. He’s our man.”) The two fields just don’t talk to each other enough to have that kind of understanding.”Still, Steffen thinks that reducing the boarding time could benefit airlines in a number of ways, especially for short flights between nearby cities. In such cases, quicker boarding might allow an additional daily flight to be scheduled, or it could reduce the number of gates an airline requires, since each gate could be cleared more rapidly. With thousands of flights taking off around the globe every day, a few minutes could save a lot of people a lot of time.More information: Steffen, Jason H. “Optimal boarding method for airline passengers.” ArXiv:0802.0733v1 [physics.soc-ph] 6 Feb 2008.Copyright 2008 PhysOrg.com. All rights reserved. This material may not be published, broadcast, rewritten or redistributed in whole or part without the express written permission of PhysOrg.com.
© 2012 Phys.org (Phys.org)—Researchers studying the cosmos have been stumped by an observation first made by Monique and François Spite of the Paris Observatory some thirty years ago; they noted that in studying the halos of older stars, that there should be more lithium 7 than there appeared to be in the universe. Since that time many studies have been conducted in trying to explain this apparent anomaly, but thus far no one has been able to come up with a reasonable explanation. And now, new research has deepened the mystery further by finding that the amount of lithium 7 in the path between us and a very young star aligns with would have been expected shortly after the Big Bang, but doesn’t take into account the creation of new amounts since that time. In their paper published in the journal Nature, Christopher Howk and colleagues suggest the discrepancy is troubling because it can’t be explained with normal astrophysics models. Journal information: Nature This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. New ideas add further mystery to why there is less lithium-7 in the universe than expected Estimates of the lithium abundance in the SMC interstellar medium and in other environments. Credit: Nature, 489, 121–123. More information: Observation of interstellar lithium in the low-metallicity Small Magellanic Cloud, Nature, 489, 121–123 (06 September 2012) doi:10.1038/nature11407AbstractThe primordial abundances of light elements produced in the standard theory of Big Bang nucleosynthesis (BBN) depend only on the cosmic ratio of baryons to photons, a quantity inferred from observations of the microwave background. The predicted primordial 7Li abundance is four times that measured in the atmospheres of Galactic halo stars. This discrepancy could be caused by modification of surface lithium abundances during the stars’ lifetimes or by physics beyond the Standard Model that affects early nucleosynthesis. The lithium abundance of low-metallicity gas provides an alternative constraint on the primordial abundance and cosmic evolution of lithium that is not susceptible to the in situ modifications that may affect stellar atmospheres. Here we report observations of interstellar 7Li in the low-metallicity gas of the Small Magellanic Cloud, a nearby galaxy with a quarter the Sun’s metallicity. The present-day 7Li abundance of the Small Magellanic Cloud is nearly equal to the BBN predictions, severely constraining the amount of possible subsequent enrichment of the gas by stellar and cosmic-ray nucleosynthesis. Our measurements can be reconciled with standard BBN with an extremely fine-tuned depletion of stellar Li with metallicity. They are also consistent with non-standard BBN.Press release What’s really bothering all the scientists working on the lithium problem is the fact that it’s the only element that doesn’t fit with models of how things should have come to exist right after the Big Bang. All known elements occur in amounts predicted, except for lithium 7; there’s just a third as much as theorists think there should be. In trying to understand why, researchers have looked at old stars that surround the Milky Way galaxy, low mass bosons called axions, and more recently binary stars that are believed to harbor black holes. Unfortunately, such studies have only made the problem worse by suggesting that even more lithium 7 ought to be hanging around somewhere than was predicted earlier.In this new research the team looked at one single huge young star in the Small Magellanic Cloud, or more precisely, at the spectrum measured of gas and dust through which light must travel to get from there to here, and found that the amount of lithium 7 is consistent with theories that suggest how much of the element there should have been shortly after the Big Bang, which is unsettling because scientists know that more of it should have been created between then and now. Thus, these new results only add to the mystery of where all the rest of it is, or worse, why it wasn’t created in the first place as models suggest. Citation: Mystery over apparent dearth of lithium 7 in universe deepens (2012, September 6) retrieved 18 August 2019 from https://phys.org/news/2012-09-mystery-apparent-dearth-lithium-universe.html Explore further
Travelweek Group TravelBrands rolls out rebrand of its wholesale brands Posted by Tags: TravelBrands Share MISSISSAUGA — TravelBrands has unveiled an updated rebrand across all subsidiaries as a way to streamline its market presence.The rebrand focuses on its products and services available through Access, TravelBrands’ one-stop shop platform, and reflects the company’s vision and strategy to “reduce its brands and focus on stronger market presence while keeping the vast product lines intact”.The new branding has already begun to roll out, with a complete transition by next week.Some notable examples of the updated branding include:TravelBrands Flights, by IntairTravelBrands Cruises, by Encore CruisesTravelBrands Packages, by SunquestTravelBrands Luxury Villas, by LujureTravelBrands Dynamic Packages, by TravelGenieTravelBrands Specialty, by Exotik JourneysAccording to Frank DeMarinis, President & CEO of TravelBrands, the updated branding of its wholesale brands will ultimately assist agents in working smarter, not harder.“We believe that this updated branding will better reflect who TravelBrands is as a leading travel organization,” he said. “By unifying our branding, we are able to simplify and streamline our communications across all channels, bringing TravelBrands to the forefront with our Access platform. I am confident the Canadian travel industry will respond well to our changes.”More news: Sunwing offers ultimate package deal ahead of YXU flights to SNU, PUJTo learn more go to travelbrandsaccess.com. Wednesday, April 11, 2018 << Previous PostNext Post >>