211 research outputs found
A fast generation cycling system for oat and triticale breeding
No full textA fast generation cycling system (FGCS) was developed in oat and triticale, allowing the production of pure line populations of the crops within 1‐year timeframe. Twelve oat and 12 triticale cultivars were tested using the FGCS, and most of them completed a generation cycle within 48–61 days under the system achieving up to seven generations a year. This system involves growing plants under stressed conditions to promote reproduction and in vitro culture of immature embryos bypassing full seed maturation. The developed system could be widely adopted in breeding and genetic studies of crops for producing desired segregating pure line populations, which could significantly shorten the breeding cycles.Hui Liu, Pamela Zwer, Haibo Wang, Chunji Liu, Zhanyuan Lu, Yanxia Wang
Guijun Ya
Magnetic levitation using neodymium magnets for vertical axis wind turbine (VAWT) II
No full textThe project, “Magnetic Levitation using Neodymium Magnets for Vertical Axis Wind Turbine” can be breakdown into 2 parts. First, the use of vertical axis wind turbine to generate energy. Secondly and also the main focus of the project, to achieve magnetic levitation using neodymium magnets. This project involved the design and fabrication of a test model vertical axis wind turbine, however as this experiment was carried out indoor without any wind condition, the author used a dc motor to simulate the wind required to spin the turbine. The advantage of this motor allows the author some control over the speed of the turbine. Achieving magnetic levitation is the ultimate goal of the project. Bearing this in mind, the author and his partner did their research and study on magnetic levitation especially on the Inductrack system. This includes the reviewing the project done by the previous project group as well as other researchers. Many ideas were discussed and some were tested out to improve the existing test model design by the previous group.Bachelor of Engineerin
Correction to: Dissociating motor learning from recovery in exoskeleton training post-stroke
No full textThe original article [1] contained an error whereby the co-author, Karima Bakhti’s name was displayed incorrectly
Technology, labour, livestock, and the Maoist developmental state:four-wheeled tractors in China, 1953–1963
No full textFour-wheeled, 25–50 horsepower tractors imported to China from other socialist countries in the 1950s were a symbol of modernity and a source of problems. They were introduced to North China to increase multiple cropping. No significant increase in multiple cropping occurred in that region. The cost of tractor services far outweighed what could be earned with the labour they displaced in the 1950s and early 1960s. However, the government remained committed to them, even as it promoted cheaper five horsepower two-wheeled tractors. Greater use of four-wheeled tractors was sustained by the rapid downgrading of the hitherto privileged role of the tractor driver, alongside an ad hoc system of tacit subsidies. These changes meant deviation from the original vision for tractors. The dire fate of draught livestock during the era of rural collectivisation was an important reason for persevering with four-wheeled tractors even as the country turned away from Soviet development models
Impact of preoperative fasting duration and prostate mass on postoperative bleeding after transurethral enucleation of the prostate: A risk factor analysis
No full textObjective This study explored the impact of preoperative fasting duration on patients who underwent transurethral enucleation of the prostate and analyzed the risk factors for postoperative bleeding. Methods A retrospective analysis was conducted among 51 patients who underwent transurethral enucleation of the prostate for benign prostatic hyperplasia between December 2021 and March 2024. Baseline and perioperative data were collected. The impact of long versus short preoperative fasting was compared. Univariate and multivariate logistic regression analyses were used to identify risk factors for bleeding complications after transurethral enucleation of the prostate. Results The mean hemoglobin difference in the short fasting group was 14.43 ± 11.23 g/L, while that in the long fasting group was 17.21 ± 12.21 g/L, showing a statistically significant difference (p = 0.048). The mean postoperative hospital stay was 3.39 ± 1.05 days in the short fasting group and 4.21 ± 1.68 days in the long fasting group, showing a statistically significant difference (p = 0.047). Univariate and multivariate regression analyses identified prostate mass (p = 0.045) and preoperative fasting duration (p = 0.033) as independent risk factors for postoperative bleeding in patients who had undergone transurethral enucleation of the prostate. Conclusion Patients who had undergone transurethral enucleation of the prostate after longer preoperative fasting experienced a more significant decline in hemoglobin levels and required longer postoperative hospitalization. Prostate mass and preoperative fasting duration were identified as independent risk factors for postoperative bleeding after transurethral enucleation of the prostate
The impact of preoperative fasting time on patients undergoing partial nephrectomy and analysis of risk factors for postoperative hemorrhage
No full textObjectiveThis study investigates the impact of preoperative fasting time on patients undergoing partial nephrectomy and analyzes the risk factors for postoperative hemorrhage to provide clinical reference for physicians treating patients undergoing partial nephrectomy.MethodsA retrospective analysis was conducted on 74 patients who underwent partial nephrectomy for renal tumors between January 2022 and March 2024. Baseline and perioperative data were collected. The effects of long-term and short-term preoperative fasting on patients undergoing partial nephrectomy were compared. Additionally, univariate and multivariate logistic regression analyses were performed to identify risk factors for hemorrhagic complications following partial nephrectomy.ResultsAmong the patients in this study, 26 (35.14%) underwent short-term preoperative fasting, while 48 (64.86%) underwent long-term preoperative fasting. The hemoglobin difference in the short-term fasting group was 21.08 ± 12.44 ml, compared to 13.65 ± 11.69 ml in the long-term fasting group, showing a statistically significant difference (p = 0.020). Differences in serum calcium (p = 0.003), serum magnesium (p = 0.031), and serum phosphorus (p = 0.001) between the short-term and long-term fasting groups were also statistically significant. Univariate and multivariate regression analyses identified the type of surgery (p = 0.050) and preoperative fasting time (p < 0.001) as independent risk factors for postoperative hemorrhage following partial nephrectomy.ConclusionPatients undergoing partial nephrectomy with short-term preoperative fasting experience a more significant decrease in hemoglobin compared to those with long-term fasting. The type of surgery and preoperative fasting time are independent risk factors for postoperative hemorrhage in patients undergoing partial nephrectomy
Evaluation and Optimization of Rendering Techniques for Autonomous Driving Simulation
No full textIn order to meet the demand for higher scene rendering quality from some
autonomous driving teams (such as those focused on CV), we have decided to use
an offline simulation industrial rendering framework instead of real-time
rendering in our autonomous driving simulator. Our plan is to generate
lower-quality scenes using a game engine, extract them, and then use an IQA
algorithm to validate the improvement in scene quality achieved through offline
rendering. The improved scenes will then be used for training
Neoproterozoic Aksu Diabase Dyke, Chinese South Tianshan: Magma Sources and Implications for Regional Gold Metallogeny
No full textTianshan is one of the world’s largest gold provinces; however, the relationship between gold mineralization and metasomatized subcontinental lithospheric mantle (SCLM) remains poorly understood. To improve our understanding, we present new bulk-rock geochemistry and platinum group element (PGE) concentrations of the SCLM-sourced Aksu Neoproterozoic diabase dykes in Chinese South Tianshan. These data, combined with in situ laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) analyses of hydrothermal pyrite grains in the diabase dykes, are used to discuss the SCLM source characteristics in the region and their potential links to formation of gold deposits. The diabase dykes exhibit high Th/Yb (0.47–0.62) and low Nb/U (13.4–16.3) ratios, indicating that magma evolution involves subduction-related fluid metasomatism and limited contamination of the continental crust. This is consistent with little variation in whole-rock Pd/Zr, Cu/Zr, and Ni/MgO ratios, suggesting that no sulfide segregation was caused by crustal contamination and magma mixing. In addition, the diabase dykes show low PGE and Au contents, with high Cu/Pd (>105) and low Cu/Zr (<0.5) ratios, indicating that magmas were derived from low-degree partial melting of the SCLM under S-saturated conditions. Such source characteristics indicate residual sulfides and chalcophile elements (e.g., PGEs, Au, and Cu) were concentrated at the SCLM reservoir in South Tianshan. Hydrothermal pyrite in the studied dykes has similar Au/Ag ratios and trace element distribution patterns to gold-bearing pyrite of lode gold deposits in Chinese South Tianshan, indicating that metasomatized SCLM may have contributed ore metals during the formation of these gold deposits. Adding to the available data, our study highlights that the SCLM may be a potential metal source reservoir, and it may have contributed to formation of the lode gold deposits in Chinese South Tianshan
<i>cis</i> -1,4-Selective Copolymerization of Ethylene and Butadiene: A Compromise between Two Mechanisms
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