ARKive - Discover the world's most endangered species Wildscreen's Arkive project was launched in 2003 and grew to become the world's biggest encyclopaedia of life on Earth. With the help of over 7,000 of the world’s best wildlife filmmakers and photographers, conservationists and scientists, Arkive.org featured multi-media fact-files for more than 16,000 endangered species. Freely accessible to everyone, over half a million people every month, from over 200 countries, used Arkive to learn and discover the wonders of the natural world. Since 2013 Wildscreen was unable to raise sufficient funds from trusts, foundations, corporates and individual donors to support the year-round costs of keeping Arkive online. As a small conservation charity, Wildscreen eventually reached the point where it could no longer financially sustain the ongoing costs of keeping Arkive free and online or invest in its much needed development. Therefore, a very hard decision was made to take the www.arkive.org website offline in February 2019.
Mediestream - Herunder fri adgang til danske aviser før 1918! Video: Introduktion og søgevejledning På eKurser.nu kan du finde et ekursus, som via to korte videoer giver en god introduktion til aviserne i Mediestream og leverer brugbare søgetips. Hvis du er mere til tekst end video, kan du finde vores egne guides her. Visualisér dine søgninger med Smurf Med værktøjet Smurf kan man få visualiseret sine søgninger i de digitaliserede aviser over tid. Andre digitale avisarkiver Flere mediehuse har selv gjort deres digitale aviser tilgængelige online, så alle kan få adgang – enten gratis eller mod betaling. Du kan desuden få gratis adgang til alle digitaliserede færøske aviser i det Færøske Nationalbiblioteks avisportal. Driftsstatus - opdateres kun i hverdagene Alle systemer burde virke normalt. Hvis du oplever andre problemer med Mediestream, så send os en mail. Udvidet adgang til udvalgte aviser På en række danske folkebiblioteker kan du få udvidet adgang til Mediestream Aviser. Introduktion til gotisk skrift
Videnskab.dk | Fysik Hjemmesidens ejer og kontaktoplysningerDenne hjemmeside er drevet og ejet af:Danmarks Medie- og JournalisthøjskoleCarl Jacobsens Vej 16, opg. 16, 2. sal2500 ValbyCVR-nr: 31111048Tlf: 70 70 17 88 CookiesCookies er små tekstfiler, der indeholder bogstaver og tal som sættes på din computer eller anden enhed. Cookies sættes, når du besøger et websted, der bruger cookies og de kan bruges til at holde styr på hvilke sider du har besøgt, de kan hjælpe dig til at fortsætte, hvor du slap eller de kan huske dine sprogindstillinger eller andre præferencer. Cookies er vigtige for os for de hjælper til at gøre vores online-tjenester lettere at bruge, til at følge med i hvordan vores website bruges og til at hjælpe os med at levere den bedste service til dig.For at gøre det lettere for dig at overskue den måde hjemmesiden bruger cookies på, har vi grupperet vores cookies i nogle let-forståelige kategorier. Man kan se hver kategori og hver cookie i cookiedeklarationen.
Bjerrumdiagrammer - pufferligningen Andre navne: (Eng.: Bjerrum chart, bjerrum plot, species distribution diagram) Bjerrumdiagrammer er en måde at visualisere hvilke ioner der dominerer i en opløsning ved en given pH, diagrammerne udvikledes af Niels Bjerrum (1879-1958) som var en Dansk kemiker. For at optegne et bjerrumdiagram må pufferligningen omskrives så forholdet mellem ionerne i et korresponderende syre/basepar kun udtrykkes ved syrens koncentration, dette gøres med syrebrøken. Syrebrøken som y-akse og pH-værdien som x-akse, dvs ionsammensætningen som funktion af pH. Regneeksempler, fx hvad er den procentvise sammensætning af ionerne i en opløsning af aminosyren glutaminsyre ved pH 7,4? Pufferligningen omskrives vha nedenstående formler til kun at indeholde syrebrøken og syrens pKs-værdi
Welcome | Newton Project ScienceOpen Uvildig udredning af Danmarks militære engagement – Københavns Universitet HyperPhysics About HyperPhysics Rationale for Development HyperPhysics is an exploration environment for concepts in physics which employs concept maps and other linking strategies to facilitate smooth navigation. For the most part, it is laid out in small segments or "cards", true to its original development in HyperCard. The entire environment is interconnected with thousands of links, reminiscent of a neural network. Part of the intent for this exploration environment is to provide many opportunities for numerical exploration in the form of active formuli and standard problems implemented in Javascript. New content for HyperPhysics will be posted as it is developed. A resource that was initiated as a resource for local high school physics teachers whom I had taught has expanded into an intensively used website worldwide. CD or DVD versions have been sent to 86 countries to date, and translations into German, Italian, Chinese, and Español have been licensed and are underway. HyperPhysics (©C.R.
Total Syntheses from A to Z Please use the following URL if you want to set a link: www.organic-chemistry.org/totalsynthesis/ . Total Synthesis - An Introduction As a scientific discipline, total synthesis has its formative roots in the mid-19th century, primarily as means for confirmation of structure. In those early days, the analytical tools available to the synthetic chemist were extraordinarily basic, so following in nature's footsteps was essential in the process of characterisation. In the centuries which have passed, the phenomenal advances in spectroscopy and crystallography have left few unknowns in the course of structure determination - so, why in this day of such powerful analytical tools, do we continue to emulate nature? Perhaps the most important rationale is as a 'real-world' test-bed for new synthetic methodology. Another excellent grant-winner is confirmation, scale-up and analogue synthesis of recently uncovered biochemically active species. Post a Job Medicinal Chemistry- Sr.
Kvant - Tidskrift for Fysik og Astronomi Sjældne sygdomme Brödtext I Socialstyrelsens kunskapsdatabas om ovanliga diagnoser finns utförlig information om drygt 300 ovanliga sjukdomar och tillstånd. Informationen skrivs i samarbete med ledande medicinska specialister och i samverkan med intresseorganisationer för brukare. Ytterligare diagnosbeskrivningar tillkommer kontinuerligt och texterna uppdateras regelbundet. Läs mer om databasen och ovanliga diagnoser här. Databasen är inte en förteckning över alla befintliga ovanliga diagnoser. Diplomatarium Danicum 4.3 Projectile Motion - University Physics Volume 1 | OpenStax A Fireworks Projectile Explodes High and Away During a fireworks display, a shell is shot into the air with an initial speed of 70.0 m/s at an angle of above the horizontal, as illustrated in Figure 4.13. The fuse is timed to ignite the shell just as it reaches its highest point above the ground. (a) Calculate the height at which the shell explodes. Figure 4.13 The trajectory of a fireworks shell. Strategy The motion can be broken into horizontal and vertical motions in which and We can then define and to be zero and solve for the desired quantities. Solution (a) By “height” we mean the altitude or vertical position y above the starting point. Because and are both zero, the equation simplifies to Solving for y gives Now we must find the component of the initial velocity in the y direction. and y is Thus, we have Note that because up is positive, the initial vertical velocity is positive, as is the maximum height, but the acceleration resulting from gravity is negative. or