Abstract: A leadless biostimulator includes a housing, and distal and proximal electrodes disposed on or integrated into the housing. The distal electrode includes an electrode body and an electrode tip mounted on a distal end of the electrode body, wherein the electrode tip is electrically conductive and configured to be placed in contact with a stimulation site. The electrode tip includes a distal tip end facing a surrounding environment and opposite a proximal tip end. The electrode tip defines a tip hole extending through the electrode tip along a longitudinal axis of the housing from the distal tip end to the proximal tip end. The tip hole comprises a through hole having a first diameter at the distal tip end and a second diameter at the proximal tip end of the tip electrode, wherein the first diameter of the tip hole is less than the second diameter of the tip hole.

Abstract: A leadless biostimulator has a housing including an electronics compartment, an electronics assembly mounted in the electronics compartment, a proximal electrode that disposed on and/or integrated into the housing, and an electrical feedthrough assembly. The electrical feedthrough assembly includes a distal electrode and a flange. The flange is mounted on the housing. The distal electrode is electrically isolated from the flange by an insulator and configured to be placed in contact with target tissue to which a pacing impulse is to be transmitted by the leadless biostimulator. A mount is mounted on the flange and thereby mounted on the electrical feedthrough assembly. A fixation element is mounted on the mount and configured to facilitate fixation of the leadless biostimulator to tissue of a patient.

Abstract: Servicing of a water treatment system of a swimming pool is facilitated by an accessory that is placed over the intake/return port of the water treatment system to fluidically isolate that intake/return port from the water in the swimming pool. The accessory is held in place by water pressure exerted thereon and water in the accessory is drained so water from the swimming pool will not flow into the water treatment system when the accessory is in place. The accessory can be used with above-ground pools as well as other pools.

Abstract: Electric-field funneling length is measured while irradiating a semiconductor charge-collecting junction with electron-hole-pair generating charged particles at a first junction bias voltage. The bias voltage is then reduced to a second level in order to reduce the depth of the depletion region such that the total charge can no longer be collected by drift and measured in the energy band previously displayed in the multichannel analyzer. This is representative of the maximum electric field funnelling length which may be calculated by measuring the difference at the second bias voltage level of the depletion width and the ion penetration range. The bias voltage is further lowered to a third level at which the particles are collected over a spread of energy levels while at least some of the particles are still collected at the selected energy level. From this the different depths of penetration of the particles are determined while additional effects due to diffusion are minimized.