Equilibrium temperature of water-ice aerosols in the high-latitude summer mesosphere

first_imgPrevious models of the equilibrium temperature and existence regions of mesospheric aerosols have shown significant radiative heating of the aerosols and, consequently, a substantially reduced existence region. We have developed an iterative model that extends this previous work by incorporating a complete collisional energy transfer algorithm, including the effects of vertical winds and particle fall velocity, that is appropriate for the free molecular flow conditions found in the mesosphere. We have also updated the ice refractive index used in the model and accounted for the dependence of the radiative heating and collisional cooling terms on particle tempe;ature. Finally, a radiation model has been used to calculate the solar, terrestrial and atmospheric radiative inputs including the effects of multiple scattering and atmospheric absorption. As with the previous models, the particle temperature is calculated under steady-state conditions, assuming the background gas temperature remains constant and the aerosol does not change size, state or altitude. Under these conditions, the largest differences from previous models occur as a result of the updated ice index of refraction, particularly in the visible, which produces significantly less aerosol heating. These temperatures are combined with the observed properties of mesospheric aerosols to place limits on the water vapour mixing ratio, vertical-wind speeds, and maximum particle sizes. It is found that H2O mixing ratios of 10 ppmv and vertical winds of order 0.02 m s(-1) are consistent with observed particle distributions, and these lead to a radiative limit on the maximum particle radius of 250 nm.last_img read more

Bouncer and lie detector called into Queen’s JCR

first_imgThe new Chair of Queen’s College JCR has introduced a bouncer and a lie-detector to common room meetings in an attempt to increase attendance among students.Dipender Gill, a third-year medic, brought along a St. Hugh’s student as a bouncer to the first meeting of term and also introduced a ‘lie detector’, which involved checking a speaker’s heart rate with a stethoscope.Gill said that the measures were introduced not just to increase security but also as “a crowd-pleaser, something to raise a smile.”The second-year ‘bouncer’ was responsible for checking students’ Bodleian cards as they entered the meeting, crossing their names off a list all Queen’s JCR members.  Gill claimed that as well as adding an element of excitement to the event the system ensured that motions were voted on only by Queen’s students. However, the method proved too time-consuming and students were eventually let in without requiring identification.The ‘lie detector’ consisted of a student in a lab coat with a stethoscope who checked the heart rate of those selected to speak by the Chair, to see if it quickened when they were asked questions.  Gill stressed that the test was included to make meetings more enjoyable but also said that the detection technique would ensure increased transparency within the JCR committee, claiming that transparency was “the theme of the term”.However, both Gill and JCR President Johnny Medland said they doubted the bouncer and lie detector would return, saying that while the JCR had found the initiatives fun, they had not been taken entirely seriously. “The rest of the JCR executive refused to take it seriously, so it made it difficult to enforce any kind of authority. The crowd seemed to enjoy it though,” Gill said.  Medland said that it would be “disappointing” to see them go, despite being put under more scrutiny by the lie detector than other JCR members.Gill promised that he had more ideas to make JCR meetings more entertaining in future weeks, including projecting each speaker at the meeting onto a television screen at the back of the room. “Something new every week would certainly keep everyone entertained. I think the important thing is to get the job done. If this is possible with the odd smile and joke, then all the better,” he said.by Nadya Thormanlast_img read more

Tax Office to Be Open on Saturday, Dec. 30

first_imgThe Tax Office will be open 9 a.m. to 1 p.m. Saturday, Dec. 30 to accept prepayment of 2018 property taxes in response to the federal Tax Cuts and Jobs Act.Payments also can be made online at www.ocnj.us/Tax through Dec. 31 using direct payment from bank accounts.Anybody making payment on Saturday can use the Ninth Street entrance to City Hall (861 Asbury Avenue) and proceed down the hall to the Tax Office. City Hall is lit up with festive lights as crowds enjoy the 2017 Christmas parade.last_img

News story: Sherwood Forester and an unknown soldier buried 100 years after their deaths in the great war

first_imgThe remains of both soldiers were discovered on the edge of the village of Ginchy, during work on a wind turbine project. Whilst 1 soldier was identified as being a Sherwood Forester through artefacts found with his remains, no artefacts were found with the other soldier. His identity and regiment are therefore unknown. The JCCC believe both soldiers were killed in September 1916 during heavy fighting in the area. Capt Benedict Griffiths and Lt Col Ret’d Dominic Hancock participate in the burial service of the unknown Sherwood Forester at Guillemont Road Cemetery, Crown Copyright, All rights reservedDespite extensive research by the MOD team, it was not possible to identify the Sherwood Forester, although it is believed that he was most likely a member of the 2nd Battalion of that regiment. However, there are still too many members of that Battalion missing in the area from that period to identify him.Both men were laid to rest by a burial party composed of members of The Mercian Regiment, the antecedent regiment of the Sherwood Foresters.The new graves were prepared by the CWGC.Mel Donnelly, CWGC Commemorations Manager said: It is a tremendous honour and privilege for me today to conduct the funeral service of 1 our fallen comrades over 100 years since he fell in battle. He is known unto God. Two burial services have taken place on the Western Front for an unknown soldier of the Sherwood Foresters (Nottinghamshire and Derbyshire Regiment) and an unknown soldier of an unknown regiment, who both fell during World War 1 on the Somme in France. The first service of the unknown solider of an unknown regiment took place on Tuesday 16 April at the Commonwealth War Graves Commission’s (CWGC) Guards’ Cemetery, Lesboeufs. The unknown Sherwood Forester was buried yesterday (Wednesday 17 April) at Guillemont Road Cemetery. It has been a privilege to organise these burial services here on the Somme. Although the identities of these two 2 soldiers remain unknown, it is only right that they are afforded the burial and recognition that they deserve. They are now at rest amongst their comrades who lived and fought with them in the cause of freedom.center_img The Reverend Tim Flowers conducts the burial service at the graveside of the unknown soldier in Guards Cemetery, Lesboeufs, Crown Copyright, All rights reservedThe Reverend Tim Flowers referring to the service for the unknown Sherwood Forester, said: A bearer party from The Mercian Regiment carry the coffin of an unknown soldier into Guards Cemetery, Lesboeufs, led by the Reverend Tim Flowers, Crown Copyright, All rights reservedThe services, organised by the MOD’s Joint Casualty and Compassionate Centre (JCCC), part of Defence Business Services, were conducted by the Reverend Tim Flowers CF, Chaplain to 4th Battalion The Mercian Regiment.Rosie Barron, JCCC said: These 2 soldiers, unknown but not forgotten, have been laid to rest alongside their comrades in Guards’ Cemetery and Guillemont Road Cemetery with honour and dignity. The Commonwealth War Graves Commission will ensure that their sacrifice is not forgotten and their graves, together with all of those who served and fell, are cared for in perpetuity.last_img read more

Courtney Barnett Absolutely Dominated Saturday Night Live Yesterday

first_imgThose paying attention of late may have caught the name Courtney Barnett in passing. The Australian rocker opened for, and collaborated with, Jack White a couple years ago, and her debut album Sometimes I Sit and Think, and Sometimes I Just Sit took the world by storm last year. She even contributed a rocking version of “New Speedway Boogie” for the Day of the Dead 59-track tribute album to the Grateful Dead, which you can stream here.Last night, Barnett made her debut on last night’s season finale of Saturday Night Live, playing two tunes from her 2015 album. If you’ve never heard Barnett, SNL provided the optimal stage for her to show off some sensational chops. Her music has something of a 1980’s rock and roll vibe to it, drawing from influences like Joan Jett and Billy Idol. Still, she manages to imbue the music with a modern freshness, smoothly belting playful lyrics while keeping the guitar licks rocking. With a tight rhythm section, Barnett is well on her way to capturing the hearts of millions after last night’s showing.Check out the two songs from the evening, “No One Really Cares If You Don’t Go To The Party” and “Pedestrian At Best,” and let us know what you think.“No One Really Cares If You Don’t Go To The Party”“Pedestrian At Best”last_img read more

Watch Greensky Bluegrass Cover Prince’s ‘1999’ In The Middle Of ‘Don’t Lie’ At HSMF

first_imgLast weekend, a number of truly talented performers descended on the High Sierra Music Festival last weekend, bringing great jams from a diverse spectrum of artists. Among those musicians were the talented folks of Greensky Bluegrass, who not only played a set on the main stage, but also let loose for an extraordinary late night set.Thanks to Must Have Media, we have our first glimpse into the band’s late night jamboree. The group opened their set with their fan-favorite tune, “Don’t Lie,” before looping into a cover of Prince’s “1999,” only to bring it back into “Don’t Lie.” What a jam! Watch the footage below.Next up for GSBG is a performance at the Ryman Auditorium in Nashville, TN scheduled for tomorrow, July 7th. Don’t miss out!last_img

James Murphy Credits David Bowie For The Reunion Of LCD Soundsystem

first_imgTimes are good with LCD Soundsystem back in our lives, and the band shows no signs of slowing down. Since reuniting in 2016, LCD Soundsystem has played numerous concerts and festivals, finally confirmed a new album on the way—even releasing their newest tunes “american dream.” and “call the police.”—and plotted an extensive tour ahead of them this fall. Having said goodbye five years prior, it’s been an exciting year for fans of LCD Soundsystem. This is all, apparently, a result of Sir David Bowie.According to LCD frontman James Murphy, in a new interview with BBC 6 Music, the decision was partially influenced by David Bowie. The two had worked together on Bowie’s farewell album Blackstar, during which Murphy was also exploring the idea of reuniting his band. David Bowie’s response is what made him leap to a final conclusion. Read the transcript of his comments below:“I spent a good amount of time with David Bowie, and I was talking about coming back, putting the band together. And I was going through the hems and haws of it, and he said, ‘Does it make you uncomfortable?’ And I said, ‘Yeah,’ and he said, ‘Good. It should. You should be uncomfortable.’ And the first thing that popped into my head was, ‘What the? What do you know? You don’t know what it’s like to be uncomfortable.’ That was my thinking. Because, of course, I’m imagining that if I was David Bowie, I’d just be walking around flipping everybody off, like, ‘I’m David Bowie!’ Like, nobody can say anything! Unless maybe Lou Reed’s there, and then he can be like, ‘Alright.’ There are maybe one or two people that get to literally not—nothing can be said about them. But that’s not who he was ever in his life. He was always making himself uncomfortable. And it was such a great feeling of, like, you just don’t know what you are to anybody else.”You can listen for yourself in the audio bit below:last_img read more

Swimming robo roach makes a splash

first_img Harvard scientists help drive new age of machines, aiming for transformative impact in medicine, on Main Street, and beyond In nature, cockroaches can survive underwater for up to 30 minutes. Now, a robotic cockroach can do even better. Harvard’s Ambulatory Microrobot, known as HAMR, can walk on land, swim on the surface of water, and walk underwater for as long as necessary, opening up new environments for this little bot to explore.This next generation HAMR uses multifunctional foot pads that rely on surface tension and surface tension induced buoyancy when HAMR needs to swim but can also apply a voltage to break the water surface when HAMR needs to sink. This process is called electrowetting, which is the reduction of the contact angle between a material and the water surface under an applied voltage. This change of contact angle makes it easier for objects to break the water surface.Moving on the surface of water allows a microrobot to evade submerged obstacles and reduces drag. Using four pairs of asymmetric flaps and custom designed swimming gaits, HAMR robo-paddles on the water surface to swim. Exploiting the unsteady interaction between the robot’s passive flaps and the surrounding water, the robot generates swimming gaits similar to that of a diving beetle. This allows the robot to effectively swim forward and turn.“This research demonstrates that microrobotics can leverage small-scale physics — in this case surface tension — to perform functions and capabilities that are challenging for larger robots,” said Kevin Chen, a postdoctoral fellow at the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) and first author of the paper.The most recent research is published in the journal Nature Communications.,“HAMR’s size is key to its performance,” said Neel Doshi, graduate student at SEAS and co-author of the paper.  “If it were much bigger, it would be challenging to support the robot with surface tension and if it were much smaller, the robot might not be able to generate enough force to break it.”HAMR weighs 1.65 grams (about as much as a large paper clip), can carry 1.44 grams of additional payload without sinking and can paddle its legs with a frequency up to 10 Hz. It’s coated in Parylene to keep it from shorting under water.Once below the surface of the water, HAMR uses the same gait to walk as it does on dry land and is just as mobile. To return to dry land HAMR faces enormous challenge from the water’s hold. A water surface tension force that is twice the robot weight pushes down on the robot, and in addition the induced torque causes a dramatic increase of friction on the robot’s hind legs. The researchers stiffened the robot’s transmission and installed soft pads to the robot’s front legs to increase payload capacity and redistribute friction during climbing. Finally, walking up a modest incline, the robot is able break out of the water’s hold. “This robot nicely illustrates some of the challenges and opportunities with small-scale robots,” said senior author Robert Wood, Charles River Professor of Engineering and Applied Sciences at SEAS and core faculty member of the Harvard Wyss Institute for Biologically Inspired Engineering. “Shrinking brings opportunities for increased mobility – such as walking on the surface of water – but also challenges since the forces that we take for granted at larger scales can start to dominate at the size of an insect.” Next, the researchers hope to further improve HAMR’s locomotion and find a way to return to land without a ramp, perhaps incorporating gecko-inspired adhesives or impulsive jumping mechanisms.This research was co-authored by Benjamin Goldberg and Hongqiang Wang.  It was supported by the Harvard John A. Paulson School of Engineering and Applied Science, the Wyss Institute for Biologically Inspired Engineering and the Office of Naval Research’s Defense University Research Instrumentation Program. Related Onward and upward, robotslast_img read more

A look inside how CBS planned Super Sunday coverage

first_imgLOS ANGELES (AP) — CBS and NBC trading Super Bowls is one of the rare times it might end up benefitting both networks. While NBC gets an Olympic/Super Bowl doubleheader next year,  CBS gets one of the best quarterback matchups in the game’s 55-year history on Sunday with Tom Brady’s Tampa Bay Buccaneers facing Patrick Mahomes’ Kansas City Chiefs. The matchup also is the lynchpin to a day of programming that has been planned for over a year _ and in the midst of the coronavirus pandemic.last_img

Clinton the Musical Sets Closing Date Off-Broadway

first_imgWe’re going to have to go back to getting our pantsuit fix in Iowa and New Hampshire over the next few months. Clinton the Musical will close off-Broadway on June 21. Starring Kerry Butler, Tom Galantich and Duke Lafoon, the production is playing at New World Stages and began previews on March 25, officially opening on April 9.Clinton The Musical, which features a book by Michael and Paul Hodge and a score by Paul, explores the two very different sides of the 42nd President of the United States: “WJ,” the wholesome, intelligent one, and “Billy,” the randy, charming one. With Hillary (Rodham) Clinton at their side, the two handle issues from The White House to Whitewater, the sax to the sex, social security to social climbers, and in the process make history. Maybe. Dan Knechtges directs.Additional cast members include Judy Gold, John Treacy Egan, Veronica J. Kuehn, Kevin Zak, Kara Guy, Dale Hensley, Rob Richardson and Gretchen Wylder.Broadway.com customers with tickets to canceled performances will be contacted with information on refunds or exchanges. View Comments Related Shows Clinton the Musical Show Closed This production ended its run on June 21, 2015last_img read more