Several independent mass estimates, obtained by different methods, suggest that an adult Albertosaurus weighed between 1. 3 tonnes ( 1. 4 short tons ) and 1. 7 tonnes ( 1. 9 tons ).

Several different computer printers were simply computer-controllable versions of existing electric typewriters.

" Several different terms are used in different situations, several of which are of modern origin:

Several churches, such as the Anabaptists and Socinians of the Reformation, then Seventh-day Adventist Church, Christadelphians, Jehovah's Witnesses, and theologians of different traditions reject the idea of the immortality of a non-physical soul as a vestige of Neoplatonism, and other pagan traditions.

Several different techniques exist to study cells are

Several different versions of a Wiccan Charge of the God have since been created to mirror and accompany the Charge of the Goddess.

The first computer using a multiprogramming system was the British Leo III owned by J. Lyons and Co .. Several different programs in batch were loaded in the computer memory, and the first one began to run.

Several different control strategies have been devised in the past years.

Several regions of the world are in different stages of adaptation and are implementing different broadcasting standards.

Several normal forms exist with different properties.

Several different telephone line modulation techniques are used by fax machines.

Several of them gained their positions through the patronage of Yasser Arafat, who balanced above the different factions, and the era after his death in 2004 has seen increased infighting among these groups, who jockey for influence over future development, the political line, funds, and constituencies.

Several different accounts of his death exist.

Several different powder samples

Several different locations claim to possess the severed head of John the Baptist.

Several different types of light sources exist, each having different properties that affect their appropriateness for certain tasks, particularly efficiency and spectral power distribution.

Several different mitigation / prevention strategies are currently employed, from the development of infertile triploids to land-based farms which are completely isolated from any marine environment.

Several companies did succeed in making 68000-based Unix workstations with virtual memory that worked by using two 68000 chips running in parallel on different phased clocks.

Several Gnostic writings, usually dated to 2nd and 3rd centuries, paint a drastically different picture of Mary Magdalene from that of the canonical Gospels.

Several layers of decision-making authority is used to allow further concessions each time the agreement goes through a different level of authority.

Several different political spectrums have been proposed.

Several different proofs of it were found, including the " elementary " proofs of Atle Selberg and Paul Erdős ( 1949 ).

Several proteins are involved, but two main methods of regulation have been identified: targeting mitochondria functionality, or directly transducing the signal via adaptor proteins to the apoptotic mechanisms.

* Several computer operating systems have various methods of running software originally designed for older versions or other OSs:

Several methods exist to compute the value of without actually expanding a binomial power or counting k-combinations.

Several of these methods may be directly extended to give definitions of e < sup > z </ sup > for complex values of z simply by substituting z in place of x and using the complex algebraic operations.

Several methods of calculation have been proposed, and although there may be small differences in the numerical values of the electronegativity, all methods show the same periodic trends between elements.

Several methods of loading are available, including pellet loading, cast loading, and press loading, the choice being determined by the characteristics of the explosive.

Several cooking methods used to soften often tough cuts have evolved into national specialties, including Sauerbraten ( sour roast ), involving marinating beef or venison in a vinegar or wine vinegar mixture over several days.

Several methods exist to dispel the curse, depending on the actor.

Several methods exist for disseminating nerve agents on the battlefield.

Several detailed studies using various methods to measure growth curves among known specimens have demonstrated that there is actually only one valid Pterodactylus species, P. antiquus.

Several methods to protect user's privacy when using location based services have been proposed, including the use of anonymizing servers, blurring of information e. a.

Several methods exist to aid the design of real-time systems, an example of which is MASCOT, an old but very successful method which represents the concurrent structure of the system.

Several methods of RNA splicing occur in nature ; the type of splicing depends on the structure of the spliced intron and the catalysts required for splicing to occur.

Several potential methods of altering the climate of Mars may fall within humanity's technological capabilities, but at present the economic resources required to do so are far beyond that which any government or society is willing to allocate to the purpose.

) Several types of naval " torpedo " were developed and deployed, most often by the Confederates, who faced a severe disadvantage in more traditional warfare methods.

Several of the trials were intended to established tactical methods of using submarines in warfare.

Several methods for heating an exhaust fluid using the gamma rays produced by positron annihilation have been proposed.

Several methods have been proposed to remedy this by increasing genetic diversity somehow and preventing early convergence, either by increasing the probability of mutation when the solution quality drops ( called triggered hypermutation ), or by occasionally introducing entirely new, randomly generated elements into the gene pool ( called random immigrants ).

Several but not all methods of altitude classification treat clouds with significant vertical extent as a separate family.

Several clinical trials have already reported positive results using rAAV to treat Leber's Congenital Amaurosis, showing that the therapy was both safe and effective There were no serious adverse events, and patients in all three studies showed improvement in their visual function as measured by a number of methods.

Several methods of Bayesian estimation select measurements of central tendency from the posterior distribution.

Several methods that can reduce the exposure to ionizing radiation during a CT scan exist.

Several geostatistical methods provide ways of relaxing this stationarity assumption.