Once the energy of the gamma ray has fallen below 100 keV, photolectric absorption dominates: gamma rays are eventually absorbed by the formation.

Once the concept of angular bandwidth is understood, the optical scientist can " jump back and forth " between the spatial and spectral domains to quickly gain insights which would ordinarily not be so readily available just through spatial domain or ray optics considerations alone.

Once again, the case of the ray passing through a vertex may pose numerical problems in finite precision arithmetics: for two sides adjacent to the same vertex the straightforward computation of the intersection with a ray may not give the vertex in both cases.

Once you add ray guns and power armor to the game, you have a fundamentally different experience.

Once a year, on 11 November at 11 a. m. ( Remembrance Day ), a ray of sunlight shines through an aperture in the roof to light up the word " Love " in the inscription.

Once the Transmat Device was finished, it suddenly kicked into operation and causes three Utroms to appear ; these Utroms blast Leatherhead with a ray gun, and take him away, destroying the Transmat Device as they leave.

Once logged in, a user can perform functions such as uploading and downloading software and data, reading news and bulletins, and exchanging messages with other users, either through email, public message boards, and sometimes via direct chatting.

Once this complex is formed, it is identified via either a " tag " attached directly to the antibody, or added in an additional technical step.

Once all the best evidence is assessed, treatment is categorized as " likely to be beneficial ", " likely to be harmful ", or " evidence did not support either benefit or harm ".

Once they were cut, they were carried by boat either up or down the Nile River to the pyramid.

Once the punch has been evaded, the boxer " weaves " back to an upright position, emerging on either the outside or inside of the opponent's still-extended arm.

Once irradiated the sample is left for a specific decay period then placed into a detector, which will measure the nuclear decay according to either the emitted particles, or more commonly the emitted gamma rays.

Once completed, the card is then mailed ( or, in more modern times, emailed ) to the game master, where it is either processed, or held until the next turn processing window begins.

Once activated, p53 will induce a cell cycle arrest to allow either repair and survival of the cell or apoptosis to discard the damaged cell.

Once proposed to the Curiate Assembly, the people of Rome could either accept or reject him.

Once legislation proposed by the king passed the Comitia Curiata, the Senate could either veto it or accept it as law.

Once the results from data mining ( potential prospect / customer and channel / offer ) are determined, this " sophisticated application " can either automatically send an e-mail or a regular mail.

Once these sequences have been amplified, they are resolved either through gel electrophoresis or capillary electrophoresis, which will allow the analyst to determine how many repeats of the microsatellites sequence in question there are.

Once targets are identified, candidate drugs can be selected, either from drugs already known to have appropriate effects, or by actually designing the candidate at the molecular level with a computer-aided design program.

Once care moves beyond the services required by the Canada Health Act — for which universal comprehensive coverage applies — there is inconsistency from province to province in the extent of publicly funded coverage, particularly for such items as outpatient drug coverage and rehabilitation, as well as vision care, mental health, and long-term care, with a substantial portion of such services being paid for privately, either through private insurance, or out-of-pocket.

Once the worm is executed, either automatically by the buggy HTML engine or manually by a user, it searches for addresses to send itself to.

Once germinated, the seedling grows either within the fruit ( e. g. Aegialitis, Avicennia and Aegiceras ), or out through the fruit ( e. g. Rhizophora, Ceriops, Bruguiera and Nypa ) to form a propagule ( a ready-to-go seedling ) which can produce its own food via photosynthesis.

Once adopted, the international conventions are enforced by the individual nations which are signatories, either through their local Coast Guards, or through their courts.

Once again, City Council did not accept the proposal without their own amendments, specifically the Fowler Amendment, which read that " all persons employed by the City should express their willingness to execute an agreement, undertaking that they will not either collectively or individually at any time go on strike but will resort to arbitration as a means of settlement of all grievances and differences which may not be capable of amicable settlement.

Once back in military company outside Troy, they employed either Machaon the surgeon ( who may have been killed by Eurypylus of Mysia, son of Telephus, depending on the account ) or more likely Podalirius the physician, both sons of the immortal physician Asclepius, to heal his wound permanently.

Once a determination of eligibility is met, either by litter application or registry research, the dog can be registered as purebred by the AKC.

Once dissolution proceedings commence, either party may seek interim or pendente lite support during the course of the litigation.

Once inside a lucid dream, the dreamer either shifts the subject matter of the dream in an OBE direction or banishes the dream imagery completely, in doing so gaining access to the underlying state of sleep paralysis ideal for visualization of separation from the body.

Once a pupil reaches ninth grade, students from Lyme either attend Thetford Academy in Thetford, Vermont ( across the Connecticut River ), Hanover High School in Hanover, New Hampshire ( about 10 miles south of Lyme ), Hartford High School in Hartford, Vermont, Lebanon High School in Lebanon, New Hampshire, St. Johnsbury Academy in St. Johnsbury, Vermont or various private high schools.

Once the player has collected enough Shine Sprites, a new level is available at Delfino Plaza, either by the acquisition of a new ability or a plot-related event.

Once a predator has sampled one of these, it is likely to remember the colouration next time it encounters a similar animal.

Once again, Liz encounters her future self, Beth ( once more played by Mary Preston ).

Once in France, experiences numerous and risky sexual encounters ; his only rule is that he never pays for sex-a rule he eventually breaks.

Once this photon beam passes through the film frame, it encounters a series of dichroic mirrors which separate the image into its primary red, green and blue components.

Once there, he encounters Wessell and discovers that the Nazi treasure and the Romanian treasure are one and the same, having been captured by the Red Army during the Battle of Berlin.

Once more he encounters the Doctor, and they wrestle in combat.

Once inside the occupied city, their patrol came face to face with Italian soldiers several times ; Maclean, with his excellent Italian, managed to bluff his way out of all of these encounters by pretending to be a staff officer.

Once a B cell encounters its cognate ( or specific ) antigen ( and receives additional signals from a helper T cell ( predominately Th2 type )), it further differentiates into an effector cell, known as a plasma cell.

Once inside Trollenberg's memory, she encounters a shell program and is approached by an interactive recording of John Connor, who goes on to explain the Skynet war, concluding with the " Skynet Resurrection Program " which used a model known as the Crypto Terminators ( of which Trollenberg was one ) which were capable of existing in civilization indefinitely until such time that technological advancements would allow for a new generation of Terminators which would be unstoppable ( during this, scenes from Trollenberg's existence are shown, including the creation of the super soldier ).

Once again the reader encounters a prehistoric man ( Beast-Killer ) who gains new insight upon encountering a monolith as did Moon-Watcher in the film.

Once within the complex, she encounters Shrike, who carries her out into the Sahara Desert.