The phrase "is however used" is grammatically correct and can be used in written English.
It is typically used to introduce a contrast or exception to the previous statement. Example: I believe that technology has greatly improved our lives, but there are some people who disagree. This is however used mostly by older generations who are not as familiar with technology.
The chemical reduction method is, however, used only for nanofluid containing Cu nanoparticle in water.
Today, cycling is however used for only a small share of everyday trips.
The authors of [19] propose a lightweight intrusion detection system that is however used for sensor networks and their related attacks (e.g. sinkhole attack), while our prototype is for infrastructure networks and different attack types.
It is, however, used as an outcome measure [ 33, 40].
CPB using a membrane oxygenator is, however, used for 1⌓2 h during cardiocirculatory arrest, and thus differs from CVVHD and haemodialysis.
The second difference is that the texture information is not included in the statistical model; texture is however used in form of a blob detector, but how that information is used by the objective function is fixed.
He is, however, using the same desk that Mr. Clinton worked at, a desk best known as the one at which John F. Kennedy Jr. played at his father's feet.
Donated bodies are, however, used for plastinating organs and body parts.
It was, however, used by supporters of nuclear weapons to try to discredit nuclear winter.
The Jabulani was, however, used in domestic leagues in Switzerland, Portugal, the United States, South Africa and the Netherlands last season, and in the French Cup and the Africa Cup of Nations.
Zyklon-B was, however, used to disinfect immigrants as they crossed the border at El Paso a practice that did not go unnoticed by Gerhard Peters, the chemist who supplied a modified version of Zyklon-B to Auschwitz.
