A membrane electrode assembly for a fuel cell which exhibits enhanced reversal tolerance. Therefore, even when the video signal is distorted, this data slicer can set appropriate slice level data to binarize the video signal, thereby suppressing the occurrence rate of decoding errors. The composition is useful, for example, as a bulk molding compound. Varying the relaxation step size prevents divergence. Moreover, a method for making the sheet-shaped heat and light source and a method for heating an object adopting the same are also included. The front light includes an optical film provided on the large face of a lightguide which faces the liquid crystal display device.