The development of an appropriate and appropriate lubricant is very important for the design of medical devices. However, often thermosetting lubricants are bonded at the high temperatures used for device processing. Therefore, the most popular material for cool lubricants is room-temperature vulcanizable (RTV) silicone. In this study, the thermosetting lubricant-blended polyorganosiloxane-terminated polydimethylsiloxane (PTPS) and polydimethylsiloxane (PDMS) were synthesized by hydrosilylation reaction and these are used as a lubricant. The mechanical properties of the lubricant containing PTPS/PDMS were compared with those of lubricant containing poly(dimethylsiloxane)-terminated poly(dimethylvinylsiloxane) (PvTS) and with those of lubricant containing polyorganosiloxane (PPS). For two mixtures, mechanical properties were measured using a tensile test and an impact test. According to the results, it was found that the stiffness and the elongation at break in PTPS/PDMS were larger than those of PvTS/PDMS and PPS/PDMS. Moreover, the glass transition temperatures of PTPS/PDMS were higher than those of PvTS/PDMS and PPS/PDMS. Therefore, lubricant in which PTPS/PDMS was blended was demonstrated to have a high safety.Keywords: polyorganosiloxane; polydimethylsiloxane; polyvinylsiloxane; polydimethylvinylsiloxane; lubricant; rubber; elastomer; liquid silicone; mechanical; thermal processes; motion
If you’re confident that performance will be the same, these functions are presumably preferable to dbms_subsql . But it’s good to be sure, and the performance of the two functions is likely different in cases where there are multiple subqueries.
A colleague of mine is doing some tests of RAC performance and reported that it’s much better with SQL than PL/SQL. I’ve taken a look at the SQL and so far it does seem to be universally better (according to https://www.pgadmin.org/wiki/Performance). d2c66b5586