A patch panel including a plurality of electrical connector assemblies, wherein each of the electrical connector assemblies comprises a first jack presented on a first side of a panel frame of the patch panel and a second jack electrically linked to the first jack to form a jack pair and presented on a second side of the panel frame. The substrate placed on the bake plate is heat-treated in a state of the gas exhausted from the minute space through the exhaust bores. In one embodiment a device, such as a prosthesis, is provided which comprises an inorganic matrix into which the gelled, solubilized ECM is dispersed to facilitate in-growth of cells into the ECM and thus adaptation andor attachment of the device to a patient. Alternative embodiments include hub variations which allow internal USB expansion without the use of PCI cards or rerouting of USB connector cables from the exterior of the computer. The present invention disclosed a digital programmable current mirror suitable for the second stage of the trans-conductance amplifier so as to reform the fixed gain trans-conductance amplifier to be digitally programmable. A compound suitable for a liposome contrast medium for performing lesion-selective imaging is provided.