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“…BACKGROUND: To evaluate the safety and efficacy of the pre-chop technique using a novel reverse chopper vs. the classic stop-and-chop technique in phacoemulsification for patients with high myopia and associated grade III–IV nuclear cataracts. …”
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“…BACKGROUND: To compare the intraoperative challenges, complications, and operation time of illuminated chopper-assisted cataract surgery between cataract surgery only and phacovitrectomy in eyes with diabetic retinopathy. …”
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“…Recently, a new prechop technique assisted with the reverse chopper is showed to be more efficient and safe, by splitting the nuclei in situ without using any US energy. …”
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“…Using the proposed technique, a capacitively-coupled chopper instrumentation amplifier (CCIA) was fabricated using a 0.18-µm CMOS process. …”
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“…However, traditional time-resolved systems require expensive lab equipment such as high-speed excitation sources and detectors or complicated mechanical choppers to achieve high repetition rates. Here, we present a cost-effective and miniaturized smartphone lifetime imaging system integrated with a pulsed ultraviolet (UV) light-emitting diode (LED) for 2D luminescence lifetime imaging using a videoscopy-based virtual chopper (V-chopper) mechanism combined with machine learning. …”
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“…It was found that the extracted velocity is dependent on the driving voltage of the chopper. Upstream of the chopper a pair of permanent sextupoles is used for polarizing the beam and velocity selection. …”
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“…The other part of the pulse, deflected vertically by the chopper, is lost on the surface of the cone.…”
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“…A dynamic IA that can reduce power consumption with a timely piecewise power-gating method, and noise level with an alternating input and chopper stabilization technique is fabricated with a 0.13-μm CMOS. …”
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“…Electrophysiological measurements of auditory chopper neurons in different species show oscillations with periods which are integer multiples of 0.4 ms. …”
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“…Linac4 will be equipped with a low energy chopper and an energy modulation system to tailor the beam structure to the needs of the PS Booster. …”
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“…A DC servo loop (DSL) is designed to minimize the offset voltage in the chopper amplifier and low frequency respiration artifacts. …”
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“…Previous researchers have studied the performance of choppers and crushers as separate units powered by diesel or gasoline engines. …”
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“…METHODS: Patients were classified into 3 groups (Grade II, Grade III, and Grade IV; n = 50 each) according to the firmness of their lens nuclei. The Eight-chopper I was used for Grade II, Eight-chopper II for Grade III, and Lance-chopper for Grade IV. …”
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“…The Superconducting H- Linac under study at CERN, and thus the LINAC 4 and, well before, the 3 MeV test stand, require a high performance beam chopper. It has to establish the required beam time-structure by deflecting towards a dump part of the beam entering the chopper line. …”
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“…This behaviour was observed explicitly for 10 keV X-rays in measurements with the ionization chamber placed before and after the chopper.…”
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“…The CORELLI instrument at Oak Ridge National Laboratory is a statistical chopper spectrometer designed and optimized to probe complex disorder in crystalline materials through diffuse scattering experiments. …”
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“…Compared with the traditional chopper measurement method for response time, this approach avoids mechanical delay induced by chopper blades. …”
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