Campbell, B. C.V. et al. (2019) Penumbral imaging and functional outcome in patients with anterior circulation ischaemic stroke treated with endovascular thrombectomy versus medical therapy: a meta-analysis of individual patient-level data.ABSTRACT Background: CT-perfusion (CTP) and MRI may assist patient selection for endovascular thrombectomy. We aimed to establish whether imaging assessments of ischaemic core and penumbra volumes were associated with functional outcomes and treatment effect.
Implant design can significantly affect the fixation strength and cutout resistance of implants for pertrochanteric fracture fixation. The novel cutout model can predict differences in cutout resistance between distinct implant designs.
1.The bullhead Cottus gobio is a small-sized fish that occurs in stony streams and lakes in Switzerland. Its numbers have declined and its distribution has become narrower over the last 30 years, most probably due to chemical pollution and/or structural habitat deterioration, and at present it is classified as a potentially endangered species. 2. This study evaluated whether chemical parameters and/or structural habitat heterogeneity have an effect on the occurrence and density of bullhead in a river system, in order to assess the potential usefulness of this species as an indicator for these parameters. Ten sites were chosen, where chemical parameters were measured monthly over a period of 2 years. Habitat heterogeneity was assessed with respect to river width and maximum depth. Correlations were drawn between the density of bullhead, the chemical water constituents and the structural habitat diversity. The longitudinal distribution of bullhead in the whole river system was determined and all obstructions with a height of at least lOcm were investigated. In two sites, the total population density of bullhead older than O+ was assessed using both multiple removal collecting and a mark-recapture method. 3. Structural habitat diversity appeared not to be important for bullhead, and the only chemical parameter that correlated with the density of this species was dissolved organic carbon. 4. Obstructions with a height of 18-20 cm were impassable for upstream movement of bullhead and thus acted as migration barriers. The longitudinal connectivity of the main river was interrupted by 48 such obstructions, which were all human-made.
5.Multiple removal collecting of bullhead resulted in small catching probabilities of 0.1 7 and 0.34. The total estimated population densities of bullhead were high, with 118 and 327 in 100 m*. The mark-recapture method revealed even higher estimated densities, of 121 and 444 in loom'. 6. It is concluded that the bullhead is a useful indicator species for determining to what extent the longitudinal connectivity of a river is interrupted by obstructions. For restoration of rivers, it is recommended that any human-made obstructions with a height of 20cm or above are removed, starting at confluences with joining rivers and moving upstream.
Abstract-Digital IC designers often use SRAM macrocells to implement on-chip memory functionality. In this paper we argue that in several situations, standard cell based memories (SCMs) can have advantages over SRAM macrocells. Various ways to implement SCMs are presented and compared to each other for different CMOS technologies and standard cell libraries and to corresponding macrocells, aiming for finding the most adequate memory option for each application. The benefits and drawbacks of SCMs compared to macrocells are illustrated with the example of a low-power low-density parity check (LDPC) decoder.
Abstract-We present a low-power quasi-cyclic (QC) low density parity check (LDPC) decoder that meets the throughput requirements of the highest-rate (600 Mbps) modes of the IEEE 802.11n WLAN standard. The design is based on the layered offset-min-sum algorithm and is runtime-programmable to process different code matrices (including all rates and block lengths specified by IEEE 802.11n). The register-transferlevel implementation has been optimized for best energy efficiency. The corresponding 90 nm CMOS ASIC has a core area of 1.77 mm 2 and achieves a maximum throughput of 680 Mbps at 346 MHz clock frequency and 10 decoding iterations. The measured energy efficiency is 15.8 pJ/bit/iteration at a nominal operating voltage of 1.0 V.
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