Abstract: Disclosed herein is a disc drive apparatus for recording and reproducing data to and from an optical disc-like storage medium. The apparatus includes a wobble signal generating element for generating a wobble signal representative of information about the wobble detected based on reflected light from the optical disc-like storage medium, and a land/groove detecting element for determining, when the light beam fails to trace a specific track correctly on the storage medium, whether the emitted light beam is located on a land field or in a groove field. The land/groove detecting element further outputs a land/groove detection signal having a waveform inverted depending on whether the light beam is located on the land field or in the groove field.

Abstract: A disc drive apparatus for recording or playing back data onto and from an optical-disc recording medium having a plurality of signal surface areas outputting detected information as reflected detection signals with different amplitudes, the disc drive apparatus including: reflected-light quantity detection means for detecting a total quantity of a light reflected by a signal surface of the optical-disc recording medium and outputting a reflected-light quantity detection signal representing the total quantity; integration means for integrating the reflected-light quantity detection signal and providing an integration output representing a result of integration of the reflected-light quantity detection signal; and identification-signal generation means for comparing the level of the reflected-light quantity detection signal with the level of the integration output used as a threshold value and for outputting an identification signal identifying a specific signal surface area among the signal surface areas as a

Abstract: An electronic device is provided which is configured for attachment to a coaxial cable having a central conductor and an outer conductor. The electronic circuit includes connection conductors that each have a central conductor connection end that is configured to have a portion for engaging and penetrating into the central conductor and to have a further portion serving to impede the connection conductors from becoming withdrawn from the coaxial cable. The configuration of the ends of the connection conductors can be that of an arrowhead. An enclosure is provided around the electronic circuit and the portion of the coaxial cable to which the electronic circuit will be coupled by the connection conductors. In addition, the central conductor are made discontinuous between the points at which the connection conductors engage into the central conductor.

Abstract: An adsorbent for removing low and/or very low density lipoprotein from body fluid in extracorporeal circulation treatment, which comprises a water-insoluble porous hard gel with exclusion limit of 10.sup.6 to 10.sup.9 daltons on which a sulfated compound is immobilized by a covalent linkage.

Abstract: Adsorbent for removing a harmful substance to be removed from body fluid such as blood or plasma composed of a porous hard gel on which a ligand having an affinity for the harmful substance is immobilized. The adsorbent is suitable for selective removal of harmful substances such as VLDL, LDL, harmful proteins, viruses and harmful cells, in extracorporeal circulation treatment.