Success rates

When considering exploration economics, the possibility of spending funds with no future returns must be taken into account. A typical world-wide success rate for rank exploration activity is one commercial discovery for every ten wells drilled. Hence a probabilistic estimation of the reserves resulting from exploration activity must take into account the main risks and uncertainties in the volume of hydrocarbons in place, the recoverable hydrocarbons, and importantly the risk of finding no hydrocarbons at all. 

The CAMEO system is a remarkable achievement that is able to model the mechanism and course of a wide range of organic reactions with a reasonable success rate. In this sense it is also highly valuable as a tool for teaching mechanistic organic chemistiy... 

METHOD 4 This is a P2P recipe that Strike has no hand in. Strike never even knew about it until Strike saw everybody talking about it on the net. But it seems to be extremely popular. Shulgin has written about it. Uncle Fester, Strike understands, has written about it. And there seems to be a lot of posts regarding its high success rates. Most people get started from the method description in the patent literature where they were first published. The following are some representative examples from the U.S. Patent 4,638,094 Process for Producing Phenylacetones ... 

Consumption of natural gas, as of the mid-1990s, was about 2000 x 10 /yr. Using seismic detection equipment, exploration firms search for gas reserves buried deep underground and beneath the sea floor. Advanced computer systems process the seismic data to pinpoint the most likely locations for reserves. These advanced systems have both cut the time required for data analysis, by 80%, and gready improved the success rate for new drill rigs. 

Attempts have also been made at predicting the secondary stmcture of proteins from the propensities for residues to occur in the a-helix or the P-sheet (23). However, the assignment of secondary stmcture for a residue only has an average accuracy of about 60%. A better success rate (70%) is achieved when multiple-aligned sequences having high sequence similarity are available. 

Subperiosteal. The subperiosteal implants are placed on the residual bony ridge and are not osseointegrated. This implant is most commonly used in the mandible but sometimes is used in the maxilla. Subperiosteal implants have been installed since the 1940s (311) and still have a success rate after five years of only 50 to 60%. A success rate of over 90% for five years and 50% for 15 years also has been quoted (312). Subperiosteal implants are fitted by casting, which is an individual procedure. The casting can be coated with a porous metal coating or other coating and then put in the patient. This may result in an improvement for these implants. 

Transosteal and Staple Implants. This implant goes through the bone and is for the purpose of attaching dentures. The mandibular bone staple plate has replaced the transosteal pin. Since 1975 the five-pin staple bone plate has been used predominantiy, and in 1985 showed a success rate of 93% after five years (317). 

Two quite successful rate equations of catalytic industrial processes are cited by Rase Chemical Reactor De.sign for Proce.s.s Plants, vol. 2, Wiley, 1977) ... 

New guidelines therefore advocate the use of non-acid phosphates plus some caustic to avoid low pH level depressions. Nevertheless, this type of program is likely to achieve a good success rate in the long term under constant load conditions and careful attention to iron oxide transport and control. 

A rough estimate is that alliances put together without any training will deliver meaningful results for one or both parties in perhaps three out of ten relationships. If the helper is well trained, the success rate rises to around seven out of ten. If the learner is also trained, both parties are likely to record significant benefits in nine out of ten relationships. If third parties are also trained to support the relationship, the success rate may be even higher. 

An eight minute cycle time does not allow any tolerance for error. Fabricators require a part success rate of approximately 95% therefore, the actual operating conditions chosen were more conservative than the ones optimized here. The conditions used in the actual process were as follows an A/E ratio of 1.05, a wind time of 3.8 minutes and mold and press temperatures of 90 and 115 C, respectively. These conditions resulted in a cycle time of eleven minutes which is three minutes more than the optimized cycle time. Figures 6a-9b, which were previously... 

Diet should be modified only in cases where foods have been proven to elicit symptoms. Patients with mastocytosis and Hymenoptera venom exposure are at risk for severe anaphylaxis. Thus, specific immunotherapy should be considered in patients with Hymenoptera venom allergy and then administered under close supervision [31]. The majority of patients with mastocytosis reportedly tolerate immunotherapy without significant side effects and appear protected following this approach [33,40]. However, there does appear to be some increased risk for adverse reactions during initiation of immunotherapy, as well as for therapy failures [31, 33]. An increased maintenance dose of insect venom has been reported to carry better success rates by sting provocation [41]. Also, in the light of 2 fatal cases of anaphylaxis after discontinuation of SIT in patients with mastocytosis [30], lifelong immunotherapy should be considered [26]. 

The process was repeated until an ensemble of chains had been tested. The fractional success rate at each radial position defined... 

The procedure is obviously a very simple one, but suffers from the fact that the success rate diminishes very rapidly as the pore radius becomes smaller. The root-mean-square radius of gyration of... 

DiMasi JA. Risks in new drug development approval success rates for investigational drugs. Clin Pharmacol Ther 2001 69 297-307. 

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