title stringlengths 1 105 | content stringlengths 5 58.1k |
|---|---|
Loran-C | retained phase master signal long enough secondary signal arrive.gating secondary signal compared master signal phase detector varying voltage produced depending difference phase.voltage represented finepositioning measurement.the system generally successful testing concerns raised signal power long range possibility j... |
Loran-C | also added fixed ° phase shift every pulse simple continuouswave jamming signals could identified rejected.the cytac system underwent enormous series tests across united states offshore.given potential accuracy system even minor changes groundwave synchronization found cause errors could eliminated — issues number rive... |
Loran-C | although reasons well recorded appears idea fully automated bombing system using radio aids longer considered possible.aaf involved missions covering km distance london berlin cytac system would work well ranges mission changed transpolar missions km even cytac offer range accuracy needed.turned attention use inertial ... |
Loran-C | extensive series tests across atlantic carried uscgc androscoggin starting april .meanwhile loranb proved serious problems keeping transmitters phase work abandoned.minor changes made cytac systems simplify including reduction pulsechain spacing µs pulse rate changed pps match existing lorana system phaseshifting pulse... |
Loran-C | chains covering north atlantic large areas pacific followed.time global charts printed shaded sections representing area mile .km accurate fix could obtained operational conditions.loranc operated khz frequency range.improving systems loranc originally designed highly automated allowing system operated rapidly original... |
Loran-C | also operated chains linked stations allowing fix made simultaneously comparing two secondaries single master.downside approach required electronic equipment built using sera tube technology large.looking companies knowledge seaborne multichannel phasecomparison electronics led ironically decca built anspn first widely... |
Loran-C | number commercial airline operators experimented system well using navigation great circle route north america europe.however inertial platforms ultimately became common role.in decca sued united states navy patent infringement producing ample documentation work basic concept early along missing f frequency khz set asi... |
Loran-C | provide extrafine guidance signal lorand interleaved another train eight pulses immediately signals one existing loranc stations folding two signals together.technique became known supernumary interpulse modulation sim.broadcast lowpower portable transmitters offering relatively shortrange service high accuracy.lorand ... |
Loran-C | m. sim concept later became system sending additional data.at time motorola proposed new system using pseudorandom pulsechains.mechanism ensures two chains within given period order many seconds pattern making easy determine signal groundwave recent transmission multihop signal previous one.system multiuser tactical na... |
Loran-C | additionally military users upgraded lorana loranc large numbers surplus lorana receivers dumped market.made lorana popular spite less accurate fairly difficult operate.early introduction integrated circuits combining complete radio receiver began greatly reduce complexity lorana measurements fully automated units size... |
Loran-C | switch c extremely rapid due largely rapidly falling prices led many users first receiver loranc.late coast guard decided turn lorana favour adding additional loranc stations cover gaps coverage.original lorana network shut units used pacific time.given widespread availability lorana charts many loranc receivers includ... |
Loran-C | gps difficult receive decode required electronics already small inexpensive loranc leading rapid adoption become largely universal.loranc st century although loranc largely redundant universally disappeared due number concerns.one gps system jammed variety means.although true loranc transmitters closeathand adjusted ne... |
Loran-C | loran located entirely atmosphere offers resilience issues.considerable debate relative merits keeping loranc system operational result considerations.in november united states coast guard announced loranc needed u.s. maritime navigation.decision left fate loran eloran united states secretary department homeland securi... |
Loran-C | part wider eurofix system combines gps galileo nine loran stations single integrated system.in norway france announced remaining transmitters make significant part eurofix system would shut december .two remaining transmitters europe anthorn uk sylt germany would longer able sustain positioning navigation loran service... |
Loran-C | accurate radio navigation made using pulse timing phase comparison techniques rely timeofflight signals.comparison angle measurements remain fairly steady time effects change values fixed objects like rivers lakes accounted charts.timing systems reveal absolute distance object case radar.problem navigational case recei... |
Loran-C | based difference times phase instead absolute time.basic idea relatively easy synchronize two ground stations using signal shared phone line instance one sure signals received sent exactly time.received exactly time however receiver receive signal closer station first.timing difference two signals easily accomplished f... |
Loran-C | instance two stations km apart receiver measures difference two signals implies receiver somewhere along line equidistant two.signal one received exactly µs receiver kilometres mi closer one station other.plotting locations one station km closer produces curved line.taking fix accomplished making two measurements diffe... |
Loran-C | others secondaries positioned lops cross acute angles increases accuracy fix.instance given chain might four stations master center allowing receiver pick signals two secondaries currently close right angles possible given current location.modern systems know locations broadcasters automate stations pick.loran method c... |
Loran-C | curves referred td lines.in practice loran implemented integrated regional arrays chains consisting one primary station least two often secondary stations uniform group repetition interval gri defined microseconds.amount time transmitting next set pulses defined distance start transmission primary next start transmissi... |
Loran-C | practice delays many chains multiples microseconds.loran chains often referred designation e.g.gri designation loran chain serving northeastern united states.due nature hyperbolic curves particular combination primary two secondary stations possibly result grid grid lines intersect shallow angles.ideal positional accur... |
Loran-C | result selection one secondaries changed td lines new combination closer right angles.allow nearly chains provide least three many five secondaries.loran charts available common marine nautical charts include visible representations td lines regular intervals water areas.td lines representing given primarysecondary pai... |
Loran-C | color official charts stations timedlines position follow specific conformance purpose international hydrographic organization iho.however local chart producers may color specific conformance standard.always consult chart notes administrations chart reference information given chart accurate information regarding surve... |
Loran-C | result nautical charts show td lines areas prevent reliance loranc navigation.traditional loran receivers display time difference pairing primary one two selected secondary stations used find appropriate td line chart.modern loran receivers display latitude longitude coordinates instead time differences advent time dif... |
Loran-C | transmitters antennas loranc transmitters operate peak powers – kilowatts comparable longwave broadcasting stations.use – metre tall mast radiators insulated ground.masts inductively lengthened fed loading coil see electrical length.well knownexample station using antenna rantum.freestanding tower radiators height rang... |
Loran-C | carolina beach uses freestanding antenna tower.loranc transmitters output powers kw higher used extremely tall metre mast radiators see below.high power loranc stations like george used four tantennas mounted four guyed masts arranged square.all loranc antennas designed radiate omnidirectional pattern.unlike longwave b... |
Loran-C | limitations loran suffers electronic effects weather ionospheric effects sunrise sunset.accurate signal groundwave follows earths surface ideally seawater.night indirect skywave bent back surface ionosphere problem multiple signals may arrive via different paths multipath interference.ionospheres reaction sunrise sunse... |
Loran-C | coverage quite good north america europe pacific rim.the absolute accuracy loranc varies ..nmi m. repeatable accuracy much greater typically ft m. loran data channel ldc loran data channel ldc project underway faa united states coast guard send low bit rate data using loran system.messages sent include station identifi... |
Loran-C | november test messages using ldc broadcast several u.s. loran stations.in recent years loranc used europe send differential gps messages employing similar method transmission known eurofix.a system called sps saudi positioning system similar eurofix use saudi arabia.gps differential corrections gps integrity informatio... |
Loran-C | supporters continued improved loran operation note loran uses strong signal difficult jam loran independent dissimilar complementary system forms electronic navigation helps ensure availability navigation signals.on february u.s. office management budget released first blueprint fiscal year budget.document identified l... |
Loran-C | millionyear loran citing redundancy alongside gps.regard pending congressional bill h.r.subsequently announced administration supports committees aim achieve orderly termination phased decommissioning beginning january requirement certifications provided document loranc termination impair maritime safety development po... |
Loran-C | originally completed march presented cosponsoring department transportation department homeland security dhs executive committees report carefully considered existing navigation systems including gps.unanimous recommendation keeping loran system upgrading eloran based teams conclusion loran operational deployed suffici... |
Loran-C | transmission canadian loranc signals terminated august .eloran potential vulnerability gnss systems propagation reception limitations renewed interest loran applications development appeared.enhanced loran also known eloran eloran comprises advancement receiver design transmission characteristics increase accuracy usef... |
Loran-C | enhancements loran make adequate substitute scenarios gps unavailable degraded.in recent years united states coast guard reported several episodes gps interference black sea.south korea claimed north korea jammed gps near border interfering airplanes ships.united states build new eloran system complement backup gps sys... |
Loran-C | united kingdom eloran implementation may uk department transport dft via general lighthouse authorities awarded year contract provide stateoftheart enhanced loran eloran service improve safety mariners uk western europe.service contract operate two phases development work focus european agreement eloran service provisi... |
Loran-C | seven differential reference stations provided additional position navigation timing pnt information via lowfrequency pulses ships fitted eloran receivers.service help ensure could navigate safely event gps failure one busiest shipping regions world expected annual traffic vessels .despite plans light decision france n... |
Loran-C | see also alpha navigation russian counterpart omega navigation system still use .chayka russian counterpart lorandecca navigator system british system used phase difference instead time difference.gee navigationgeeh navigationglobal positioning systemlocal positioning systemoboe navigationomega navigation system wester... |
Loran-C | hyperbolic airborne radio navigation aids.journal navigation –.doi.s.l.e. gatterer development loranc navigation timing national bureau standards october conant jennet .tuxedo park wall street tycoon secret palace science changed course world war ii. |
Loran-C | new york simon schuster.pp.–.isbn .halford john alvin davidson d. waldschmitt j. a. .history loran pdf. |
Loran-C | pierce john alvin mckenzie alexander anderson woodward richard horace eds.. loran long range navigation.office scientific research development national defence research committee.mit radiation laboratory series.vol.. |
Loran-C | new york mcgraw hill.pp.–.external links united states national institute standards technology site using loran c timekeeping.european loranc network websiteloranc transmitter rantum structuraehellissandur transmission tower structurae former loranc transmitter mast used longwave broadcastingloranc facility antenna gil... |
Youdao | case loran.international loran association.archived original january .retrieved july .featured search engine parent companys web portal .com lets users search web pages images news music blogs chinesetoenglish dictionary entries more.history youdao subsidiary netease developing mobile applications using big data techno... |
Youdao | january first mobile version youdao dictionary pushed onto market.youdao dictionary launched online dictionarylike software related services including wholeparagraph translation.translation based data youdao search engine massive web data generated data mining natural language processing.large number chinese parallel c... |
Youdao | beta using cloud storage technology.cloud storage technology aims help users build virtualized pools access data easily securely.solves crossplatform crosssite issues personal information data management.december cloud notes .beta formally upgraded full version changed name youdao cloud notes. |
Youdao | june youdao cloud notes exceeded million users.youdao shopping products also developed.september original youdao shopping search engine youdao shopping assistant youdao shopping cash back fully integrated huihui assistant purpose speaking consumers.huihui assistant web browser extension compares products previous consu... |
Youdao | products youdao dictionary offline version youdao dictionary offline version uses huge number builtin vocabulary example sentences meet needs users unable access internet.desktop versionyoudao dictionary desktop version uses user interface offline version.however limited lexicon.application need identify word needed se... |
Youdao | typical acoustic translation smart screen word identification realtime synchronization network uptodate vocabulary word lookup features.youdao dictionary could also translate text picture using ocr technology.compatible windows xp os x. also provides extensions firefoxchromeie.youdao dictionary .integrated collins engl... |
Youdao | supports symbian android windows phone ios java generic phones.youdao cloud note youdao cloud note originally youdao note launched june netease.cloud base online notebook software supports variety attachment formats initial free g storage capacity.youdao cloud note uses triple backup means storing data three times impr... |
Youdao | early december youdao cloud note launched .version pc iphone android webside application.upgraded version adds todo feature multiple version restore feature improve management users schedule notes.huihui shopping assistant huihui shopping assistant netease product developed youdao.comparison tool online shopping browsi... |
SONAR (Symantec) | references external links official websiteunlike virus signatures sonar examines behavior applications decide whether malicious.sonar built upon technology symantec acquired late purchase wholesecurity developer behavioral antimalware antiphishing software solutions united states.works algorithm used evaluate hundreds ... |
SONAR (Symantec) | main use sonar enhance detection zero day threats.symantec claims sonar also prevent attackers leveraging unpatched software vulnerabilities.ed kim director product management symantec expressed confidence sonar weve done extensive testing emerging threats catches early threats variants existing threats.history symante... |
SONAR (Symantec) | sonar sonar part norton norton v. antivirus software.according company version leverages data sources including reputation data program.therefore sonar able accurately detect security risks before.sonar sonar came norton public beta.available norton customers legitimate subscriptions updates norton customers norton v. ... |
SONAR (Symantec) | according company sonar finetuned better detect fake antivirus software better integrated network component.advise sonar enhanced integration network component order classify convict remediate malware basis malicious network activity.feature place continue block remove many new variants malware leave network footprint ... |
SONAR (Symantec) | according norton protection blog post norton community titled whats new norton internet security introducing sonar policy enforcement – ability convict suspicious process based behavioral “profile.” create profiles analyst looks attributes sonar tracks make series associations.example let’s say particular process tried... |
SONAR (Symantec) | big deal—we aren’t looking process computer also looking communication characteristicssonar .also introduces protection non process threats npts.name suggests threats active processes inject legitimate active processes.sonar .technology able much aggressively remove threats preinfected machines. |
Thin client | referencesserver work include launching software programs performing calculations storing data.contrasts rich client conventional personal computer former also intended working client–server model significant local processing power latter aims perform function mostly locally.thin clients occur components broader comput... |
Thin client | benefits centralization hardware resource optimization reduced software maintenance improved security.example hardware resource optimization cabling bussing io minimized idle memory processing power applied user sessions need it.example reduced software maintenance software patching operating system os migrations appli... |
Thin client | rdp ica pcoip local web browser terminal emulators cases basic set local utilities.characteristics architecture using cloudbased architecture server takes processing load several client sessions acting host endpoint device.client software narrowly purposed lightweight therefore host server server farm needs secured rat... |
Thin client | simplicity thin client computing known simplify desktop endpoints reducing clientside software footprint.lightweight readonly operating system os clientside setup administration greatly reduced.cloud access primary role thin client eliminates need large suite local user applications data storage utilities.architecture ... |
Thin client | data recovery desktop repurposing tasks also centralized faster service greater scalability.hardware server must robust enough handle several client sessions thin client hardware requirements minimal compared traditional pc desktop.thin clients low energy processors flash storage memory moving parts.reduces cost power ... |
Thin client | typically dont store critical data locally risk theft minimized little user data compromised.graphics modern thin clients come long way meet demands todays graphical computing needs.new generations low energy chipset cpu central processing unit combinations improve processing power graphical capabilities.minimize laten... |
Thin client | host software stacks makes use user datagram protocol udp order accelerate fast changing pixel updates required modern video content.thin clients typically support local software agents capable accepting decoding udp.some graphically intense use cases remain challenge thin clients.use cases might include applications l... |
Thin client | limitations achieve simplicity thin clients sometimes lag behind desktop pcs terms extensibility.example local software utility set device drivers needed order support locally attached peripheral device e.g.printer scanner biometric security device thin client operating system may lack resources needed fully integrate ... |
Thin client | therefore good practice perform validation tests locally attached peripherals advance ensure compatibility.large distributed desktop environments printers often networked negating need device drivers every desktop.while running local productivity applications goes beyond normal scope thin client sometimes needed rare u... |
Thin client | demand bandwidth exceeds network limits could result major loss end user productivity.a similar risk exists inside data center.servers must sized correctly order deliver adequate performance end users.cloudbased computing model servers also represent single point failure risk.server fails end users lose access resource... |
Thin client | redundancy provides reliable host availability add cost smaller user populations lack scale.providers popular providers thin clients include chip pc technologies chip pc wyse technology ncomputing dell acquired wyse hp clearcube technology igel technology zeetim lg samsung electronics.history thin clients roots multius... |
Thin client | devices running display server software .x terminals remained relatively popular even arrival thin clients midlate s. modern unix derivatives like bsd linux continue tradition multiuser remote displayinput session.typically x software made available nonxbased thin clients although technical reason exclusion would preve... |
Thin client | terminal server edition project codenamed hydra.windows nt became basis windows windows xp.microsoft windows systems support graphical terminals via remote desktop services component.wyse winterm first windowsdisplayfocused thin client aka windows terminal access environment.the term thin client coined tim negris vp se... |
Thin client | ellison subsequently popularized negris buzzword frequent use speeches interviews oracle products.ellison would go founding board member thin client maker network computer inc nci later renamed liberate.the term stuck several reasons.earlier term graphical terminal chosen distinguish terminals textbased terminals thus ... |
Boot image | however little size difference thin clients retained key advantages competitors needing local drive.however thin client misnomer slim formfactor computers using flash memory compactflash sd card permanent flash memory hard disk substitute.see also client typesdumb terminal like thin clients zero local processing power ... |
Boot image | pure boot images contain missioncritical data.definition pure boot image contains data cannot reproduced configurations offtheshelf executables.particular enduser data part boot image although operating systems require copy user preferences configuration files kept within boot image e.g.microsoft windows registry.utili... |
Boot image | virtual machine virtual machine infrastructure directly import export boot image direct installation bare metal i.e.disk.standard technique oems install identical copies operating system many identical machines boot image created virtual machine exported created one disk copied via boot image control infrastructure als... |
Boot image | goals keeping boot image entirely separate disposable mandating boot image control organizations seek keep total cost operations including total cost ownership component low.often organizations look uptime service.one goal boot image control minimize number boot images used organization reduce support costs.includes le... |
Security Vision | use networks store data secure servers.hardware acceptance testing new machine confirms fit use standardized boot image environment.boot image installation ensure supportable standardized boot images used.troubleshooting help desk functions employ standardized tests identify source problems boot software hardware.deskt... |
Security Vision | certification software core level comprises functionality stocktaking integrity control certified means level control absence nondeclared capabilities listed national catalog certified information security means federal office technical export control also usedin automatic systems class g included «management document.... |
Security Vision | nomination «emc – creation powerful applications technology».infobez award .nomination «meteor – speed reaction quick right solutions»solution № russia monitoring enterprise security management based analysis results expert magazineprofessional award area information security «silver dagger».diploma medal nomination «r... |
Immobiliser | prizewinning place.press «how automate measurement information security scale enterprise»«it co protected personally identifiable information «rostelekom j.s.c.» irkutsk subscribers»«virtual systems security illusion pointless fear»«managed security»«creation automatic information security management system»«the soc en... |
Immobiliser | modern immobiliser systems automatic meaning owner remember activate it.immobilisers mandatory new cars sold germany since january united kingdom since october finland since australia since canada since .early models used static code ignition key key fob recognised rfid loop around lock barrel checked vehicles engine c... |
Immobiliser | information used insurance investigations warranty claims technical troubleshooting.availability addon immobilisers available older cars vehicles come equipped factory immobilisers.insurance approval selfarming immobiliser known thatcham motor insurance repair research centre thatcham england.approved immobilisers must... |
Immobiliser | immobilisers fitted around cars australia account cars stolen.many instances vehicle fitted immobiliser stolen thief access original key.around one four stolen vehicles stolen professional thieves.majority vehicles stolen opportunistic thieves relying finding older vehicles ineffective security none all.honda first mot... |
Immobiliser | many vehicle immobilisers use megamoschip proven crackable.megamos transponder one many different transponders found todays immobiliser systems also comes many different versions.hacking immobiliser real world would performed vehicle key.would faster program new key vehicle try clone existing key especially modern vehi... |
Colin Percival | benefits terms prevented thefts least three times higher costs installing device.see also antitheft systemantihijack systemignition interlock deviceonboard diagnosticssecurity issuesvehicle theft protection programremote keyless systemsmart keykey lock references external links motor insurance repair research centre th... |
Colin Percival | sfu studied number theory peter borwein competed william lowell putnam mathematical competition placing top putnam fellow top six .ran pihex project organizing contributors world help calculate specific bits pi.percival graduated sfu awarded commonwealth scholarship university oxford.in oxford percival set research dis... |
Colin Percival | commenter mailing list suggested using xdelta reduce size files transferred percival began working efficient delta compression algorithm.new algorithm called bsdiff became new focus doctoral research later widelyused standard freebsdupdate became part freebsd.contributed portsnap uses bsdiff distribute snapshots freebs... |
Colin Percival | discovered security flaw would allow malicious thread use timingbased sidechannel attack steal secret data another thread executing processor core sharing cache.months reporting problem intel operating system vendors suggestions mitigate system software made details public may .finished thesis returned sfu visiting res... |
Colin Percival | already trying two years get freebsd running amazon ec platform increased efforts.building disk images debugging kernel crashes coordinating people amazon freebsd eventually overcame technical obstacles amazon announced official support freebsd ec november .percival continued support freebsd ec recognized aws community... |
Colin Percival | concluded key derivation functions use vulnerable attack sought make attacks costprohibitive designing algorithm must use amount memory nearly proportional run time.defined memoryhard functions terms presented scrypt specific example used key derivation function tarsnap.memoryhard functions since become active area res... |
Spoofing attack | personal life percival typei diabetes.referencesinternet spoofing tcpip many protocols tcpip suite provide mechanisms authenticating source destination message leaving vulnerable spoofing attacks extra precautions taken applications verify identity sending receiving host.ip spoofing arp spoofing particular may used lev... |
Spoofing attack | although website email spoofing attacks widely known service relies domain name resolution may compromised.referrer spoofing websites especially pornographic paysites allow access materials certain approved login pages.enforced checking referrer header http request.referrer header however changed known referrer spoofin... |
Spoofing attack | email address spoofing sender information shown emails field spoofed easily.technique commonly used spammers hide origin emails leads problems misdirected bounces i.e.email spam backscatter.email address spoofing done quite way writing forged return address using snail mail.long letter fits protocol i.e.stamp postal co... |
Spoofing attack | done using mail server telnet.geolocation geolocation spoofing occurs user applies technologies make device appear located somewhere actually located.common geolocation spoofing use virtual private network vpn dns proxy order user appear located different country state territory actually located.according study globalw... |
Spoofing attack | another example geolocation spoofing occurred online poker player california used geolocation spoofing techniques play online poker new jersey contravention california new jersey state law.forensic geolocation evidence proved geolocation spoofing player forfeited winnings.telephony caller id spoofing public telephone n... |
Spoofing attack | since spoofed calls originate countries laws receivers country may apply caller.limits laws effectiveness use spoofed caller id information scam.global navigation satellite system spoofing global navigation satellite system gnss spoofing attack attempts deceive gnss receiver broadcasting fake gnss signals structured re... |
Spoofing attack | power counterfeit signals gradually increased drawn away genuine signals.suggested capture lockheed rq drone aircraft northeastern iran december result attack.gnss spoofing attacks predicted discussed gnss community previously known example malicious spoofing attack yet confirmed.proofofconcept attack successfully perf... |
Spoofing attack | russian gps spoofing june approximately twenty ships black sea complained us gps anomalies showing vessels transpositioned miles actual location professor todd humphreys believed likely spoofing attack.gps anomalies around putins palace moscow kremlin led researchers believe russian authorities use gps spoofing whereve... |
Spoofing attack | preventing gnss spoofing various ways prevent gnss spoofing.hardware softwarebased systems already exist.a simplified approach improve resiliency gnss equipment spoofing attacks require changes hardware agnostic varying gps receivers architecture system using antispoofing software.an antispoofing software similar antiv... |
Spoofing attack | important recommended use areobscure antennas.install antennas visible publicly accessible locations obscure exact locations introducing impediments hide antennas.add sensorblocker.sensors detect characteristics interference jamming spoofing signals provide local indication attack anomalous condition communicate alerts... |
Spoofing attack | receiver misled attack attack recognized reported backup devices may corrupted receiver handover.these installation operation strategies development opportunities significantly enhance ability gps receivers associated equipment defend range interference jamming spoofing attacks.a system receiver agnostic detection soft... |
Spoofing attack | similarly method outlined researchers ieee intelligent vehicles symposium conference paper discuss idea using cooperative adaptive cruise control cacc vehicle vehicle vv communications order achieve similar goal.method communication abilities cars radar measurements used compare supplied gnss position cars determine di... |
Spoofing attack | services called texttospeech tts style transfer services.first one aimed creating new person.second one aimed identifies another voice identification systems.a large number scientists busy developing algorithms would able distinguish synthesized voice machine real one.hand algorithms need thoroughly tested make sure sy... |
Special Protection Group | referencesformed act parliament india.spg protects prime minister times india abroad well prime ministers immediate family members residing official residence.family members however may decline security.previously spgs mandate included protecting prime ministers parents wife sic children resident anywhere india term of... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.