A liquid-jet head includes: a plurality of individual passages communicating with nozzle orifices that jet liquid; a manifold communicating with the plurality of individual passages, in which a surface of the manifold on the liquid-jetting face side is sealed with a sealing member; and a rib provided in the manifold on the sealing member side. A tape recording andor reading system with adjustable wrap angles is described which can be used with the method of the invention. However, the virtual local oscillator signal is constructed using signals that do not contain a significant amount of power at the wanted output RF frequency, so there is no LO component to leak to the output. In addition, methanol may be sourced from the gasification of biomass to exploit a potential synergy between biodiesel manufacture and biomass gasification. To this end, the first component is a spring element connecting the moving object and the second component is a force-measurement device which releases an electrical signal corresponding to the force that is exerted on the spring element. The resin coating layer contains metal boride particles having a volume average primary particle diameter of from about 300 nm to about 2,500 nm.