Split Hopkinson pressure bar (SHPB) experiments were conducted to investigate the mechanical behavior and microstructure evolution of CoCrFeMnNi alloy (Cantor alloy) under three strain rates ...(3 × 103, 6 × 103, and 9 × 103 s−1) at room temperature. The corresponding deformed samples were studied mainly by transmission electron microscopy (TEM), with the focus on the defected structures. The results indicate that the flow stress and strain-hardening rate are both significantly dependent on strain rate. Nano-twinning occurred during deformation at 9 × 103 s−1, whereas dislocation-glide was dominant during deformation at 3 × 103 s−1. The transition of deformation modes under different dynamic compression rates is discussed.
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•High-entropy CoCrFeMnNi alloy was subjected to high-strain-rate compressive deformation (3 × 103, 6 × 103, and 9 × 103 s−1).•Mechanical responses and microstructures under various strain rates were investigated.•Dislocation glides prevailed under the strain rates of 3 × 103 s−1.•With increasing strain rates up to 9 × 103 s−1, nano-twins formed, multiplied, and eventually intersected.•The evolution of deformed substructures was discussed.
While the international nEDM collaboration at the Paul Scherrer Institut (PSI) took data in 2017 that covered a considerable fraction of the parameter space of claimed potential signals of ...hypothetical neutron (n) to mirror-neutron (n′) transitions, it could not test all claimed signal regions at various mirror magnetic fields. Therefore, a new study of n−n′ oscillations using stored ultracold neutrons (UCNs) is underway at PSI, considerably expanding the reach in parameter space of mirror magnetic fields (B′) and oscillation time constants (τnn′). The new apparatus is designed to test for the anomalous loss of stored ultracold neutrons as a function of an applied magnetic field. The experiment is distinguished from its predecessors by its very large storage vessel (1.47 m3), enhancing its statistical sensitivity. In a test experiment in 2020 we have demonstrated the capabilities of our apparatus. However, the full analysis of our recent data is still pending. Based on already demonstrated performance, we will reach sensitivity to oscillation times τnn′/cos(β) well above a hundred seconds, with β being the angle between B′ and the applied magnetic field B. The scan of B will allow the finding or the comprehensive exclusion of potential signals reported in the analysis of previous experiments and suggested to be consistent with neutron to mirror-neutron oscillations.
Survival rates of the juvenile grouper Epinephelus fuscoguttatus against Streptococcus sp. and an iridovirus, and non-specific immune parameters such as alternative complement activity (ACH50), ...lysozyme activity, natural hemagglutination activity, respiratory bursts, superoxide dismutase (SOD) activity, and phagocytic activity were determined when the fish were fed diets containing sodium alginate at 1.0, or 2.0 g kg−1. Fish fed a diet containing sodium alginate at the level of 1.0 or 2.0 g kg−1 had a significantly higher survival rate than those fed the control diet after challenge with Streptococcus sp. and an iridovirus. The ACH50 level, lysozyme activity, respiratory bursts, phagocytic activity, and SOD level of fish fed diets containing sodium alginate at 1.0 and 2.0 g kg−1 after 6–9 days significantly increased, compared to those of fish fed the control diet. We therefore recommend dietary sodium alginate administration at ≥1.0 g kg−1 to enhance immunity and resistance against Streptococcus sp. and an iridovirus of E. fuscoguttatus.
Purpose
The surgical management of neonates with duodenal atresia (DA) involves re-establishment of intestinal continuity, either by duodeno-duodenostomy (DD) or by duodeno-jejunostomy (DJ). Although ...the majority of pediatric surgeons perform DD repair preferentially, we aimed to analyze the outcome of DA neonates treated with either surgical technique.
Methods
Following ethical approval (REB:1000047737), we retrospectively reviewed the charts of all patients who underwent DA repair between 2004 and 2014. Patients with associated esophageal/intestinal atresias and/or anorectal malformations were excluded. Outcome measures included demographics (gender, gestational age, and birth weight), length of mechanical ventilation, time to first and full feed, length of hospital admission, weight at discharge (z-scores), and postoperative complications (anastomotic stricture/leak, adhesive obstruction, and need for re-laparotomy). Both DD and DJ groups were compared using parametric or non-parametric tests, with data presented as mean ± SD or median (interquartile range).
Results
During the study period, 92 neonates met the inclusion criteria. Of these, 47 (51%) had DD and 45 (49%) DJ repair. All procedures were performed open, apart from one laparoscopic DJ. Overall, DD and DJ groups had similar demographics. Likewise, we found no differences between the two groups for length of ventilation (p = 0.6), time to first feed (p = 0.5), time to full feed (p = 0.4), length of admission (p = 0.6), prokinetic use (p = 0.5), nor weight at discharge (p = 0.1). When the 30/92 (33%) patients with trisomy-21 (DD = 16, DJ = 14) were excluded from analysis, the groups still had similar weight at discharge (p = 0.2). Postoperative complication rate was not different between the two groups. One patient per group died, due to respiratory failure (DD) and sepsis (DJ).
Conclusions
This study demonstrates that in neonates with duodenal atresia, duodeno-duodenostomy and duodeno-jejunostomy have similar outcomes. These findings are relevant for surgeons who repair duodenal atresia laparoscopically, as duodeno-jejunostomy had equal clinical outcomes and may be easier to perform.
Cold-rolling Fe22Co22Ni20Cr22Mn14 high entropy alloy (with a deformation of 70%), and annealing it at two temperatures (1100 and 800 °C) respectively created a bimodal grain size distribution in ...large-grain (LG) samples having an average grain size of 45.9 ± 20.0 μm and in small-grain (SG) samples having an average grain size of 4.3 ± 3.0 μm. Under three cryogenic temperatures (−50, −100, and −150 °C), high-speed deformation (~9 × 103 s−1) was conducted on a split Hopkinson pressure bar (SHPB) system to investigate the microstructural evolution of deformation nanotwins in the bimodal-structured samples. Subjected to high-speed deformation at decreasing cryogenic temperatures, the mechanical behaviors of LG samples were superior to those of SG samples. Notably, under high-speed deformation at −150 °C, LG structures achieved excellent mechanical strength of ~3.3 GPa with good ductility of ~31.9%. Profuse lamellar annealing nanotwins, which pre-existed in the coarse grains of LG samples, promoted efficient refinement strengthening. High-resolution transmission electron microscopy (HR-TEM) clearly revealed that the deformation nanotwins induced by high-speed deformation further refined the pre-existing annealing nanotwins in the coarse grains of LG samples, presumably providing advanced mechanical sustainability for high-speed deformation at cryogenic temperatures. It is suggested that the micrometer-scaled and nanometer-scaled annealing twins appear first in the matrices of coarse grains, enhancing the initial work-hardening; subsequently the deformation nanotwins form in pre-existing annealing nanotwins and narrow strips of the matrix, effectively providing the dynamic grain refinement and the work hardening capacity.
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•70% cold-rolling Fe22Co22Ni22Cr22Mn14 alloys and then annealing at 1100 and 800°C creates bimodal structures in large and small grain samples, respectively.•Under ~9 × 103 s−1 compressive deformation on a split Hopkinson pressure bar (SHPB) system at 150 °C, LG structures achieve ultra-strength of ~3.3GPa with good ductility of ∼31.9%.•LG and SG samples subjected to SHPB deformation exhibit sharp increases in strength with decreasing cryogenic temperatures.•Annealing nano-twins are significantly further refined by deformation nano-twins under SHPB compressive deformation at 150 °C.
There are several factors to influence effectiveness of manufacturing. People productivity is one of very important factor that helps to construct lean manufacturing that provides profit of company. ...We separate operators' work hour into effective productivity and non-effective productivity to point out opportunity to improve productivity without heavy invest. Through constructed visible people loading with BI (Business Intelligent) software analysis system using existing KPI (Key performance Index), we can see whole picture of actual factory runs. Benchmark, resource leverage and re-organize job become possible and precise by visible chart within those huge data. Several truly opportunities and effective activities will be discussed as below that exposure by visible BI; most of them was executed and help us to improve at least 30% people productivity without extra heavy invest.
3D reconstruction, inferring 3D shape information from a single 2D image, has drawn attention from learning and vision communities. In this paper, we propose a framework for learning pose-aware 3D ...shape reconstruction. Our proposed model learns deep representation for recovering the 3D object, with the ability to extract camera pose information but without any direct supervision of ground truth camera pose. This is realized by exploitation of 2D-3D self-consistency between 2D masks and 3D voxels. Experiments qualitatively and quantitatively demonstrate the effectiveness and robustness of our model, which performs favorably against state-of-the-art methods.
Survival rates of the juvenile grouper Epinephelus fuscoguttatus against Streptococcus sp. and an iridovirus, and non-specific immune parameters such as alternative complement activity (ACH...), ...lysozyme activity, natural hemagglutination activity, respiratory bursts, superoxide dismutase (SOD) activity, and phagocytic activity were determined when the fish were fed diets containing sodium alginate at 1.0, or 2.0 g kg... Fish fed a diet containing sodium alginate at the level of 1.0 or 2.0 g kg... had a significantly higher survival rate than those fed the control diet after challenge with Streptococcus sp. and an iridovirus. The ACH... level, lysozyme activity, respiratory bursts, phagocytic activity, and SOD level of fish fed diets containing sodium alginate at 1.0 and 2.0 g kg... after 6-9 days significantly increased, compared to those of fish fed the control diet. We therefore recommend dietary sodium alginate administration at ≥ 1.0 g kg... to enhance immunity and resistance against Streptococcus sp. and an iridovirus of E. fuscoguttatus. (ProQuest: ... denotes formulae/symbols omitted.)
People productivity is one important factor of manufacturing that constructs profit of company. How to improve productivity is always one topic that managers want to run after. We separate operators' ...work hour into effective productivity and non-effective productivity to point out opportunity to improve productivity without heavy invest. Through constructed x-dimension people loading diagnosis system with existing KPI (Key performance Index), we can see whole picture of actual factory runs. Benchmark, resource leverage and re-organize job become possible and precise by x-dimension loading diagnosis. Several truly opportunities and effective activities will be discussed as below; most of them was executed and help us to improve 13% people productivity without extra heavy invest.
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