23 research outputs found

    Electronic elections employing DES smartcards

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    This paper covers the design of a voting protocol which can be used to perform local electronic elections with the use of currently commercial available devices. In contradiction with other proposed voting schemes the new proposed protocol does not rely on properties of asymmetric cryptographic algorithms like RSA. If needed an asymetric protocol can be used to attain the needed functions in the new protocol. It uses some of the techniques proposed in [Rob98] to authenticate messages without the need of cryptographic keys on public systems. Design characteristics are anonymously, democratically, non-coercion and public verifiably. Meeting all of these requirements is probably impossible. In any proposed scheme implementing all but one of these requirements is achieved. A nice implementation feature of the designed system is that the needed technology is already available and widely spread implemented in electronic purse smartcards.Applied Science

    Hominin homelands of East Java: Revised stratigraphy and landscape reconstructions for Plio-Pleistocene Trinil

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    Trinil (Java, Indonesia) yielded the type fossils of Homo erectus and the world?s oldest hominin-made engraving. As such, the site is of iconic relevance for paleoanthropology. However, our understanding of its larger geological context is unsatisfactory. Previous sedimentological studies are around 100 years old and their interpretations sometimes contradictory. Moreover, the existing stratigraphic framework is based on regional correlations, which obscure differences in local depositional dynamics. Therefore, a new and more local framework is urgently needed. We carried out a comprehensive geological study of the Trinil area. Using a Digital Elevation Model, we identified seven fluvial terraces. Terrace deposits were described and OSL-dated and fluvial behaviour was reconstructed. The terraces were correlated with terraces of the Kendeng Hills (e.g. the hominin-bearing Ngandong terrace) and date back to the past -350 ka. Thus far, most of the Trinil terraces and their deposits had remained unidentified, confounding sedimentological and stratigraphic interpretations. The exposed pre-terrace series has a thickness of -230 m. Together with the terraces, it forms a -3 Ma record of tectonism, volcanism, climate change and sea-level fluctuations. We subdivided the series into five new and/or revised stratigraphic units, representing different depositional environments: Kalibeng Formation, Padas Malang Formation, Batu Gajah Formation, Trinil Formation and Solo Formation. Special attention was paid to erosional contacts and weathering profiles, forming hiatuses in the depositional series, and offering insight into paleoclimate and base-level change. The Trinil Formation provides a new landscape context of Homo erectus. Between -550 and 350 ka, the area was part of a lake basin (Ngawi Lake Basin), separated from the marine base level by a volcanic barrier, under dry, seasonal conditions and a regular supply of volcanic ash. An expanding and retreating lake provided favourable living conditions for hominin populations. After 350 ka, this role was taken over by the perennial Solo River. Landscape reconstructions suggest that the Solo formed by headward erosion and stream piracy, re-connecting the Ngawi Lake Basin to the plains in the west. Our study offers a local framework, but its Pleistocene landscape record has regional significance. Most of all, it forms a much-needed basis for future, detailed studies on the build-up of the hominin site of Trinil, its fossil assemblages and numerical ages. (c) 2021 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)

    Studies of charm and beauty hadron long-range correlations in pp and pPb collisions at LHC energies

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    © 2020 The Author(s).Measurements of the second Fourier harmonic coefficient (v2) of the azimuthal distributions of prompt and nonprompt D0 mesons produced in pp and pPb collisions are presented. Nonprompt D0 mesons come from beauty hadron decays. The data samples are collected by the CMS experiment at nucleon-nucleon center-of-mass energies of 13 and 8.16 TeV, respectively. In high multiplicity pp collisions, v2 signals for prompt charm hadrons are reported for the first time, and are found to be comparable to those for light-flavor hadron species over a transverse momentum (pT) range of 2-6 GeV. Compared at similar event multiplicities, the prompt D0 meson v2 values in pp and pPb collisions are similar in magnitude. The v2 values for open beauty hadrons are extracted for the first time via nonprompt D0 mesons in pPb collisions. For pT in the range of 2-5 GeV, the results suggest that v2 for nonprompt D0 mesons is smaller than that for prompt D0 mesons. These new measurements indicate a positive charm hadron v2 in pp collisions and suggest a mass dependence in v2 between charm and beauty hadrons in the pPb system. These results provide insights into the origin of heavy-flavor quark collectivity in small systems

    Study of vector boson scattering and search for new physics in events with two same-sign leptons and two jets

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    This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.A study of vector boson scattering in pp collisions at a center-of-mass energy of 8 TeV is presented. The data sample corresponds to an integrated luminosity of 19.4fb-1 collected with the CMS detector. Candidate events are selected with exactly two leptons of the same charge, two jets with large rapidity separation and high dijet mass, and moderate missing transverse energy. The signal region is expected to be dominated by electroweak same-sign W-boson pair production. The observation agrees with the standard model prediction. The observed significance is 2.0 standard deviations, where a significance of 3.1 standard deviations is expected based on the standard model. Cross section measurements for W±W± and WZ processes in the fiducial region are reported. Bounds on the structure of quartic vector-boson interactions are given in the framework of dimension-eight effective field theory operators, as well as limits on the production of doubly charged Higgs bosons

    Search for long-lived particles produced in association with a Z boson in proton-proton collisions at √s = 13 TeV

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    © 2022, The Author(s).A search for long-lived particles (LLPs) produced in association with a Z boson is presented. The study is performed using data from proton-proton collisions with a center-of-mass energy of 13 TeV recorded by the CMS experiment during 2016–2018, corresponding to an integrated luminosity of 117 fb−1. The LLPs are assumed to decay to a pair of standard model quarks that are identified as displaced jets within the CMS tracker system. Triggers and selections based on Z boson decays to electron or muon pairs improve the sensitivity to light LLPs (down to 15 GeV). This search provides sensitivity to beyond the standard model scenarios which predict LLPs produced in association with a Z boson. In particular, the results are interpreted in the context of exotic decays of the Higgs boson to a pair of scalar LLPs (H → SS). The Higgs boson decay branching fraction is constrained to values less than 6% for proper decay lengths of 10–100 mm and for LLP masses between 40 and 55 GeV. In the case of low-mass (≈ 15 GeV) scalar particles that subsequently decay to a pair of b quarks, the search is sensitive to branching fractions B(H → SS) < 20% for proper decay lengths of 10–50 mm. The use of associated production with a Z boson increases the sensitivity to low-mass LLPs of this analysis with respect to gluon fusion searches. In the case of 15 GeV scalar LLPs, the improvement corresponds to a factor of 2 at a proper decay length of 30 mm. [Figure not available: see fulltext.

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Hitchcock Military Academy of San Rarael, Fremont High of San Fran. ■■two Berkeley Hitch and Alameda High. The flret match game of the man- -■-ni'.- series for Palo Alto will be oa Stanford Beld a we«k from next Saturday end will be witb Sao Jose Hitch. Stanford haa donated the une of the field for practice and came*. "Ited" Reynolds, former Varait soccer captain at Stanford and now a graduate stndent in the univeraity. baa volunteered to ajd and wlll coach tbe Palo Alto High Scbooi soccer aquad, Jimmy" Adams, Stanford soccer fullback aod himself a Phi Beta Kappa, which Impll-sa hlith acholas- alandlnc. baa volunteered to so frequently to San Joae and coach the high acbool team there. proposition of Jolnlns the Saturday league of schools playing soccer waa made to the Palo Alto Hist. School Wedneadar afternoon Harry Maloney. the Stanford trainer. |n a apeech in the asaem* room at the sebool. The Idea mnthusiajitically received, and enough iwrsons Hlgned nt om-e to rm two team**. Announcement of the schedule of ten me* will be made aa aoon as fur* ler details hsve been completed. McOovern. one of the asutstant •rretarles of the Panama Mpoel- tlon. haa sold Harry Maloney that in connection with the comprehensive athletic program and the na* tlonat and International ■■...-■- games and cbamplonehlpa tbe expo- altion'a athletic management hoi>es alao to have a California high school soccer nerles for the state champion* ■hip among preparatory achoola and an intercollegiate aeries between the California and Stanford varaltlea as added stlraclions on the ex|ioalt1on| fields. With Its proximity to the Stanford campus, tu Ki-i'h a Stanford captain and the fart tbst Stanford haa never lost a noccer nerles OaJIfornla. Palo Alto High enters the new league with ususual oppor- tunltlea for rapid advancement toward a champlomihip team. J. C. Templeton, eupertntendent of achoola ln Palo Alto, one of the ofnelaU and promoters of the new high echool atblatk foderatlon. likes the Idea nf hnvlng snecer adopted as a t-.tan-.anl aport by the federation and bellevea it will he. He himself win bring tbe matter up at a federation committee meeting to be held at the Olympic Club In flan Pranclwo next Saturday evening. It may not be generally known, but wicmt i- played by more in-li- vlduala und In more coiiiitrlef* thnn any other outdoor athletic game In the world. Soccer league* for international matchea exist in Italy. Austria. I'm- els, Norway, Sweden, !>enmark, Ilt-l* gium. Wale*. Ireland. England. Prance. 0*»rroany, Netberlandf.. Hungary. Switzerland. There are aocrer tumoriationn throughout Aun- tralla and New -Zealand and ln Canada, while many states of tha I'nlted Stat*-* have tbelr soc-aer rli-tm and tournsmenta Soccer Is also played in Cuba. South Afrira. ftrll- Ish India and ln many other locnll- II*". wh*>re the BrliUher haa aown th« need. Only last June. *.n the Internationa) ■■■■-... Denmark defeated England 3 to 0, and' then England dt-feated Sweden In two games, first '■ to 1 and then * to 0. Then came the war and put a atop to the great number of International ni-'iii iv But today IlrltlHh troops tire playing soccer behind tbe Qrlng line as exhilarating recreation after cramped and anxioua confinement In the trenches. ~^" PAGE THREE Cawling by Ftaas* It la barO to appreciate tbst fire bsr widely different degrees of heat, IW every buralng blase aeems to have the extreme best ur Qrn, yet the flame st burning alcohol la actually used for cooling purTKM-iw lo oa* msks of sssrtb- llght because tb* alcohol flame Is not nceny so but ss tbs point of firs st tbs center of tbs aesrcbtlgbt^ A eotml -tetttxhlight needs to bave Its lamp ,ie -*mill as possible, snd tbs in-.-1it H is to Juat a point of light, tli.-.n'i -tin having Intense tight, lbs r.M i.i mn Its beams be thrown. The ..ii.-. »>v (o i.'i.i-.-utratt tbe light Is to it I.*■ ti..- Octirew wr best of tbe light »-r.*ur\v. aucti a« an electric arc. but lo ttuar heat Ls likely to result In melting tbe whole nppsratua. *** Tbe above avarcnilgbt s*i-rcseda In highly ioiKt-ntrating tbe light source. and tben to prevent this co-acentrsteit light fr-nn ni-*)ting everything ueer It * alcnbol .;i*Kir la fed round It. The alcohol vapor Iniriw of course, bnt aa it naturally bums at a temperature far lower than that -of tbe electric arc It seta something tike tbe water Jacket of sn aufomoblle engine and prevents the metal and glaaa of tbe acarvblight from becoming excesalvely bot.-Bsturds*/ Kvsntog Poet. Ewo Stanford Engagements Mi*-*. Alice Rogers *1*>. member of the Staoford English Club, member of the Sequ'oln staff and ot Delta Delta 3orortty, and John Hagsr 'li, Bow on his way to Harvard for ad* vaocsd work la preparation for business, announced thslr engage-* ment to s gathering of frlenda Id Los Atticles New Yesr'a dsy. Miss Helen Horton '14. Phi Nets Kappa, member of Cap and down. president of Itoble Cluh, and J. B. Cox '14, sn Enrlna man from Honolulu, have announced their engagement. LIST PROPERTY NOW Ftm H.W.K, KXCHAX-flK. HENT BYXBEE & SLOCUM tOl l.-tH-m \\i-nur PHONE 4ft PaloAlto. DAIRY STATISTICS FOR OCTOBER. NOVEMBER. DECEMBER. 1914. Av. ->snttary Av. Bacteria Av. Butt-** Dairy Permit. Bears. Tsr QC Kst Pe. ' Inapected" 1'HIU.IPS * 8EQPE1KA . . ..»&.t) 16.006 4,3 tl. X, U Dairy) L. H. BARKEIt 94.7 8,S00 *..',' < Psrsgon1 W. C. WILBUB .' M.I I0.R00 tl (Horns) A. E. 1 wiui 1.1. gT.o 34.000 4.8 PKKKOTON A STinri! 80.0 4t>,000 4.3 (Menlo Hslgbts) C. A V. in il i M- It 7>,3 3.:-00 4.5 (Sunset Dslryl BARRON ESTATE 7B.0 7f.,000 ■ 4.5 B. MAl'RAUX 74.0 4R.000 3.0 (Jersey Dairy) J. MEI.1.0 Tl.t 3S.O0O S.O PALO ALTO CREAMERY CO. 31.000 -f.J ("Psatcurlied") PALO ALTO CREAMERY COMPANY is the dlatrlbutlng creamery for the following aupplles: Sequclra A Phllllits "Inspected." Barron Estate. J. Mello.** Atl milk and cream from Ibis creamery, except "lus-tectod," ia psateitrixed. All milk and cre-ani, et-.-cpt ]..i-.ii-nt i.-. .1 ftom turtH-rvulln teated and 9m*pM*/9a*\ .-.iwa oraly. Il*l*lt—Ad^t > 11. E. ORAY Heslth Officer. ♦s-sssssssssssssssssssssssssssssssosssssssssssssssss DID YOU KNOW IT? We are Selling COAL and WOOD For Cash And the difference in price will take you to a show ABERDEEN (VIAL fll per lo*. Km k M-KiM.-. OOA1 911 pec i"i.. Hslf fon tSrJJO, fill Mill Iota 92.711. One mark OO .. nt- Wood Prices in Proportion PHONE 944 and pocket the Difference Green & Green 431 High Street Back Number Wanted We need one copy of The Pslo Allan for June 26, 1914, In order jto rum pie te our file for binding. We ahall be glsd to pay 10 cents for thii copy If anybody has one. •1J Mi:.-. PUBLISHING CO. Low Round Trip Rates to SAN DIEGO FOR ihe SAN DIEGO FAIR TICKETS SOLD JANUARY i TO FEBRUARY 28. .....nr: Iln.,. (rau .la-s. Rr.urn Until tlir,.- month, fnnn rl.,1. nf -sir. STOPOVERS ALLOWED BOTH GOING AND RETURNING Southern Pacifi
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