Tag Archives: 爱上海TU

ScienceShot: An Icy Road to the Forbidden City

first_imgTwo thousand years after the Chinese began using wheeled vehicles, they turned back to a much more primitive method of transportation. In order to construct the Forbidden City, an imperial palace for the emperor, throughout the 15th and 16th centuries, workers slid giant stones—some weighing more than 300 tons—down artificial paths of ice that extended from Dashiwo quarry, 70 kilometers southwest of the city, to the Beijing site of the new palace. A team of engineers has for the first time examined the benefits that an ice path—created by freezing water spewed onto the ground from a series of wells—would have over other transport methods. Many of the giant stones, such as the central carving shown above, were above the capacity of wheeled vehicles at the time, so a pulled sledge would have been more reliable, the researchers found. What’s more, to pull a single 123-ton stone on a dirt road would have required 1537 men, they report this week in the Proceedings of the National Academy of Sciences; to drag the same stone across frozen ice would take 338 men; and to tug the stone on ice lubricated with a thin film of fresh water: only 46 men.See more ScienceShots.Sign up for our daily newsletterGet more great content like this delivered right to you!Country *AfghanistanAland IslandsAlbaniaAlgeriaAndorraAngolaAnguillaAntarcticaAntigua and BarbudaArgentinaArmeniaArubaAustraliaAustriaAzerbaijanBahamasBahrainBangladeshBarbadosBelarusBelgiumBelizeBeninBermudaBhutanBolivia, Plurinational State ofBonaire, Sint Eustatius and SabaBosnia and HerzegovinaBotswanaBouvet IslandBrazilBritish Indian Ocean TerritoryBrunei DarussalamBulgariaBurkina FasoBurundiCambodiaCameroonCanadaCape VerdeCayman IslandsCentral African RepublicChadChileChinaChristmas IslandCocos (Keeling) IslandsColombiaComorosCongoCongo, The Democratic Republic of theCook IslandsCosta RicaCote D’IvoireCroatiaCubaCuraçaoCyprusCzech RepublicDenmarkDjiboutiDominicaDominican RepublicEcuadorEgyptEl SalvadorEquatorial GuineaEritreaEstoniaEthiopiaFalkland Islands (Malvinas)Faroe IslandsFijiFinlandFranceFrench GuianaFrench PolynesiaFrench Southern TerritoriesGabonGambiaGeorgiaGermanyGhanaGibraltarGreeceGreenlandGrenadaGuadeloupeGuatemalaGuernseyGuineaGuinea-BissauGuyanaHaitiHeard Island and Mcdonald IslandsHoly See (Vatican City State)HondurasHong KongHungaryIcelandIndiaIndonesiaIran, Islamic Republic ofIraqIrelandIsle of ManIsraelItalyJamaicaJapanJerseyJordanKazakhstanKenyaKiribatiKorea, Democratic People’s Republic ofKorea, Republic ofKuwaitKyrgyzstanLao People’s Democratic RepublicLatviaLebanonLesothoLiberiaLibyan Arab JamahiriyaLiechtensteinLithuaniaLuxembourgMacaoMacedonia, The Former Yugoslav Republic ofMadagascarMalawiMalaysiaMaldivesMaliMaltaMartiniqueMauritaniaMauritiusMayotteMexicoMoldova, Republic ofMonacoMongoliaMontenegroMontserratMoroccoMozambiqueMyanmarNamibiaNauruNepalNetherlandsNew CaledoniaNew ZealandNicaraguaNigerNigeriaNiueNorfolk IslandNorwayOmanPakistanPalestinianPanamaPapua New GuineaParaguayPeruPhilippinesPitcairnPolandPortugalQatarReunionRomaniaRussian FederationRWANDASaint Barthélemy Saint Helena, Ascension and Tristan da CunhaSaint Kitts and NevisSaint LuciaSaint Martin (French part)Saint Pierre and MiquelonSaint Vincent and the GrenadinesSamoaSan MarinoSao Tome and PrincipeSaudi ArabiaSenegalSerbiaSeychellesSierra LeoneSingaporeSint Maarten (Dutch part)SlovakiaSloveniaSolomon IslandsSomaliaSouth AfricaSouth Georgia and the South Sandwich IslandsSouth SudanSpainSri LankaSudanSurinameSvalbard and Jan MayenSwazilandSwedenSwitzerlandSyrian Arab RepublicTaiwanTajikistanTanzania, United Republic ofThailandTimor-LesteTogoTokelauTongaTrinidad and TobagoTunisiaTurkeyTurkmenistanTurks and Caicos IslandsTuvaluUgandaUkraineUnited Arab EmiratesUnited KingdomUnited StatesUruguayUzbekistanVanuatuVenezuela, Bolivarian Republic ofVietnamVirgin Islands, BritishWallis and FutunaWestern SaharaYemenZambiaZimbabweI also wish to receive emails from AAAS/Science and Science advertisers, including information on products, services and special offers which may include but are not limited to news, careers information & upcoming events.Required fields are included by an asterisk(*)last_img read more

Go back to the enewsletter This holiday season

first_imgGo back to the e-newsletter >This holiday season, Hyatt Regency Hong Kong and Hugo’s head chef, Marco Mehr, will present his first festive menus to Hong Kong diners.Silent Night A dinner party with live music on Christmas Eve features an extensive six-course European gourmet menu starting with blue lobster and scallop tartar with compressed beetroot, horseradish and champagne vinaigrette; followed by pan-fried Bresse pigeon with French foie gras, persimmon, brioche and Cassis pigeon jus.For the mains, diners can feast on poached French sea bass with Oscietra caviar, sous vide fennel and sea urchin foam and crispy roasted US beef tenderloin with Bayonne ham wrapped black truffle mashed potatoes, arugula and pumpkin. A finale of  European Christmas dessert, chocolate and Morello cherry mille-feuille with eggnog ice cream, complete the experience.New Year’s EveGourmands can usher in 2016 with a six-course New Year’s Eve set dinner at Hugo’s,  starting with a French foie gras variation with passion fruit, mango and christstollen.  Then, Hokkaido scallop confit with Oscietra caviar, endive, persimmon and sea urchin foam as well as cepe velouté which is served with poached quail egg, crispy enoki mushroom and hazelnut oil.  For the mains, seared Spanish wild turbot with brioche thyme crust, champagne risotto and garden herbs;and slow roasted US beef tenderloin with braised beef short rib croquette, cauliflower truffle mousseline, braised onion and natural beef jus.  A vanilla bean and saffron cream served with red currant and yuzu apricot sauce is served for dessert.Festive BrunchOn Christmas Day and New Year’s Day, Hugo’s festive-licious brunch offers diners seafood-on-ice including oysters, lobsters and crab legs,  and signature hors d’oeuvres. Made-to-order main courses include roasted US beef ribs, roasted French guinea fowl with foie gras, slow braised Australian lamb shank, herb roasted French monkfish, as well as egg specialities such as scrambled eggs with black truffle, European seasonal mushroom omelette or egg benedict cardinal. To complete the culinary experience, a selection of hand-crafted desserts will be offered; while free-flowing champagne, white wine and red wine will be available for guests seeking premium indulgence during the festive season.Go back to the e-newsletter >last_img read more