Systems and methods for removing jump discontinuities in PCR or growth data. To present also a lithium ion secondary battery of light weight and high energy density to be used in various electronic appliances and power source of electric vehicle or the like. The panel assembly held by the panel support unit is placed, together with a receptacle accommodating a liquid material, in a common environment. The light source also includes a second waveguide, which is coupled to the first waveguide. A securing element is provided for securing the loop section in the recess. A selectively fastenable connector extends between the right and left side portions.