• decay
  • Rutherford applied the principle of a radioactive element's half-life to studies of age determination of rocks by measuring the decay period of radium to lead-206. (wikipedia.org)
  • Half-life is constant over the lifetime of an exponentially decaying quantity, and it is a characteristic unit for the exponential decay equation. (wikipedia.org)
  • A half-life usually describes the decay of discrete entities, such as radioactive atoms. (wikipedia.org)
  • N(t) is the quantity that still remains and has not yet decayed after a time t, t1⁄2 is the half-life of the decaying quantity, τ is a positive number called the mean lifetime of the decaying quantity, λ is a positive number called the decay constant of the decaying quantity. (wikipedia.org)
  • There is a half-life describing any exponential-decay process. (wikipedia.org)
  • In radioactive decay, the half-life is the length of time after which there is a 50% chance that an atom will have undergone nuclear decay. (wikipedia.org)
  • Another isotope 240Cm was produced in a similar reaction in March 1945: 94 239 P u + 2 4 H e ⟶ 96 240 C m + 3 0 1 n {\displaystyle \mathrm {^{239}_{\ 94}Pu\ +\ _{2}^{4}He\ \longrightarrow \ _{\ 96}^{240}Cm\ +\ 3\ _{0}^{1}n} } The half-life of the 240Cm α-decay was correctly determined as 26.7 days. (wikipedia.org)
  • λ {\displaystyle \lambda } is the decay constant, in the reciprocal of the time units of the X axis. (wikipedia.org)
  • 1950s
  • The original term, half-life period, dating to Ernest Rutherford's discovery of the principle in 1907, was shortened to half-life in the early 1950s. (wikipedia.org)
  • Up to this time, lysosomes, discovered in the 1950s by the Belgian cytologist Christian de Duve, were thought responsible for the complete digestion of intra- and extracellular proteins by the lysosomal hydrolytic enzymes. (wikipedia.org)
  • years
  • Two successful zombie games released in 2 years following a 1-year layoff from the release of one of the most well-received, well-bought packages in gaming history has led to now, when you have millions of rabid fans clamoring for a new Half-Life game. (rockpapershotgun.com)
  • game
  • Returns the game time based on the game tick. (amxmodx.org)
  • Half-Life (stylized as HλLF-LIFE) is a science fiction first-person shooter video game developed by Valve and published by Sierra Studios for Microsoft Windows in 1998. (wikipedia.org)
  • It won over fifty PC "Game of the Year" awards and is considered one of the greatest video games of all time. (wikipedia.org)
  • Half-Life is a first-person shooter that requires the player to perform combat tasks and puzzle solving to advance through the game. (wikipedia.org)
  • Valve employee Erik Johnson explained the engine's nomenclature on the Valve Developer Community: When we were getting very close to releasing Half-Life (less than a week or so), we found there were already some projects that we needed to start working on, but we couldn't risk checking in code to the shipping version of the game. (wikipedia.org)
  • birds
  • My internship ends on June 1st which seems like it is such a long time away, a time when the sun will be shining, the birds will be playing in birdbaths and there will be no slippery spots on the road, but that is only four months away. (treeoflifeuu.org)
  • radiation
  • Absorbing five sieverts of radiation over a year's time is not fatal, but exposure to five sieverts in just 60 seconds, for example, will almost certainly kill you from radiation poisoning (it's a miserable way to die, by the way). (blogspot.com)
  • The residents of this area are exposed to a naturally occurring radiation dose ten times higher than the worldwide average. (wikipedia.org)
  • Some radiation taints large amounts of land and drinking water causing formal mutations throughout animal and human life. (wikipedia.org)
  • Unlike
  • Unlike many other games at the time the player has almost complete uninterrupted control of Freeman, and the story is told through scripted sequences seen through his eyes. (wikipedia.org)
  • Unlike most of its peers at the time, Half-Life used scripted sequences, such as a Vortigaunt ramming down a door, to advance major plot points. (wikipedia.org)
  • days
  • It wasn't this most recent surge of Half-Life 2 nostalgia that led me to play through the final chapter of Half-Life 2 a total of 15 times in 2 days. (pcgamer.com)
  • But when I play it, I never play the last chapter, and I didn't want to this week, and I certainly didn't want to play it 15 times in two days. (pcgamer.com)
  • release
  • There's been a lot of Half-Life 2 talk lately, what with Marc Laidlaw creatively writing some gender-swapped fan fiction that revealed his vision for the missing Episode 3 and Lever Softworks speeding up the release schedule of its Half-Life 2: Aftermath mod . (pcgamer.com)
  • I have been researching it and it seems that it keeps insulin release at bay, however, for the life of me I can't find an article explaining how long it has this effect. (anabolicminds.com)
  • The release of Half-Life 2: Episode One and The Orange Box both introduced new versions of the engine that could not be used to run older games or mods without the developers performing upgrades to code and, in some cases, content. (wikipedia.org)
  • citation needed] Since Source engine's release in 2004, the following major architectural changes have been made: The Source 2006 branch was the term used for Valve's games using technology that culminated with the release of Half-Life 2: Episode One. (wikipedia.org)
  • citation needed] Image-based rendering technology had been in development for Half-Life 2, but was cut from the engine before its release. (wikipedia.org)
  • Show
  • When it came down to show Half-Life 2 for the first time at E3, it was part of our internal communication to refer to the "Source" engine vs. the "Goldsource" engine, and the name stuck. (wikipedia.org)
  • levels
  • Thorium is found at low levels in most rocks and soils, where it is about three times more abundant than uranium, and is about as common as lead. (wikipedia.org)
  • long time
  • Why I played it this week: I was working on some Half-Life 2 stuff for an upcoming issue of our magazine, and my contribution involved using Garry's Mod, which I have not used in a very, very long time. (pcgamer.com)
  • Image
  • This time there's this image floating around, although I've yet to track down whether it's sourced from Valve, which reveals the ghostly face of one G-Man at the bottom of what might be a flyer. (rockpapershotgun.com)
  • higher
  • He cites a USA Today study from 2004 that found that "wrestlers have death rates roughly seven times higher than the general population. (nytimes.com)
  • exactly
  • Note that after one half-life there are not exactly one-half of the atoms remaining, only approximately, because of the random variation in the process. (wikipedia.org)
  • given
  • The total amount of activity deposited up to any given time is the same irrespective of the wind pattern, so overall casualty figures from fallout are generally independent of winds. (wikipedia.org)
  • jump
  • If there is a ping jump in time or a failure along the route then that will indicate potential issues. (geekstogo.com)
  • total
  • More than half the total bomb debris lands on the ground within about 24 hours as local fallout. (wikipedia.org)
  • series
  • It was Valve's debut product and the first in the Half-Life series. (wikipedia.org)
  • It was the third transuranium element to be discovered even though it is the fourth in the series - the lighter element americium was unknown at the time. (wikipedia.org)
  • development
  • Yet nearly the entire mainstream media remains in a complete news blackout over this devastating development that threatens the sustainability of all life in the Northern hemisphere . (blogspot.com)
  • It debuted with Counter-Strike: Source in June 2004, followed shortly by Half-Life 2, and has been in active development since. (wikipedia.org)
  • seven
  • The seven developers who spent over six months online creating the demo met one another for the first time. (wikipedia.org)
  • News
  • Natural News ) There are times when I'm convinced humanity is a suicidal cult of complete idiots whose only real achievement is figuring out increasingly obscene ways to distract themselves from reality. (blogspot.com)
  • remains
  • They communicate information about the activity of the pacemaker, such as how much time remains before the batteries need to be replaced. (wikipedia.org)
  • play
  • Whenever I play MP HL2(be it DM, CS, or anything else), withOUT fail, every 7 minutes I time out. (geekstogo.com)
  • initial
  • Half-life (symbol t1⁄2) is the time required for a quantity to reduce to half its initial value. (wikipedia.org)
  • The half life of a species is the time it takes for the concentration of the substance to fall to half of its initial value. (wikipedia.org)
  • The general equation for an exponentially damped sinusoid may be represented as: y ( t ) = A ⋅ e − λ t ⋅ ( cos ⁡ ( ω t + ϕ ) + sin ⁡ ( ω t + ϕ ) ) {\displaystyle y(t)=A\cdot e^{-\lambda t}\cdot (\cos(\omega t+\phi )+\sin(\omega t+\phi ))} where: y ( t ) {\displaystyle y(t)} is the instantaneous amplitude at time t A {\displaystyle A} is the initial amplitude of the envelope. (wikipedia.org)
  • large
  • Intra-articular half lives can thus be used to consider such questions as whether immune complexes are significantly reflected by the synovial surface, how the reflective property changes in arthritides or with treatment, and how significantly reflection might influence the intra-articular concentration of large "markers" of joint disease activity. (bmj.com)
  • Nevertheless, when there are many identical atoms decaying (right boxes), the law of large numbers suggests that it is a very good approximation to say that half of the atoms remain after one half-life. (wikipedia.org)
  • important
  • Other important parameters include: Period τ {\displaystyle \tau } , the time it takes for a single cycle, in units of time t. (wikipedia.org)
  • although
  • In stronger winds, fallout travels faster but takes the same time to descend, so although it covers a larger path, it is more spread out or diluted. (wikipedia.org)