A management system for a computer system is disclosed. The technique creates a short, wide and almost straight tubular access to the posterior mediastinum, pericardial space and interior of the heart through a penetration in a segment in the GI tract preferably the esophagus in proximity to a cardiac chamber. The requirement for manufacturing accuracy and the effort required for assembly of the silent chain are reduced. The resin blend can improve mechanical and surface characteristics of a resin article. Accordingly, the conductive film is less prone to being peeled off the insulating film. A non-aqueous electrolytic solution including the above-mentioned solvent and a lithium secondary battery using the non-aqueous electrolytic solution are also disclosed.