La interlengua y el proceso de la adquisición de la competencia escrita de los estudiantes de español. Estudio contrastivo y análisis de errores

[ES] Este trabajo tiene como objetivo investigar, por una parte, la interlengua de los estudiantes universitarios del primer curso al cuarto de español en China y, por otra parte, la influencia de los manuales y métodos aplicados en el aula a través del análisis de errores, para conocer el proceso de adquisición de la competencia escrita por parte de los estudiantes chinos. Para realizar este objetivo, hemos realizado dos pruebas: un cuestionario y una producción escrita. Además, seleccionamos dos muestras: en la muestra A encontramos a participantes que usan generalmente los mismos manuales y sus profesores emplean los mismos métodos de enseñanza. Son alumnos del primer al cuarto curso que provienen de dos universidades chinas. En la muestra B los participantes son del cuarto curso pero de distintas universidades en las que utilizan diferentes manuales y métodos de enseñanza. Por último, una vez analizadas las redacciones, tratamos de analizar las causas de los errores encontrados y proponer algunas propuestas didácticas en las conclusiones del capítulo IV de este trabajo

Research status and development trend of compressed air energy storage in abandoned coal mines

Compressed air energy storage (CAES) has the advantages of low construction cost, small equipment footprint, long storage cycle and environmental protection. Exploring the development of CAES technology in underground space is one of the innovative approaches to achieve China’s “dual-carbon” goal. Underground energy storage reservoirs can be classified into salt caverns, aquifers, depleted oil and gas fields, abandoned coal mines, and caverns. With the increasing number of abandoned coal mines in China, the direct closure of resource-depleted coal mines not only cause a significant waste of underground space resources, but also induce a series of safety, environmental and other issues. Therefore, utilizing the underground space of abandoned coal mines as CAES reservoirs holds great application prospects. The analysis shows that, ① There is a large amount of usable space in abandoned coal mines, and eight reuse modes of underground space in abandoned coal mines have been summarized: agricultural and forestry land, construction land, site greening, watershed utilization, water-heat combination, wetland park, mine park, and space reuse. ② The research on CAES in abandoned coal mines in China started late, the basic theoretical research is weak, the key technologies is immature, and geological conditions in coal mines are complex, the relevant applications of basic research is insufficient, and the commercialization, large-scale promotion and application have not yet been achieved. ③ Three key technologies are summarized and proposed to cope with the CAES in abandoned coal mines, i.e., the evaluation method of site selection for the construction of abandoned coal mine energy storage reservoirs, the key technology for the sealing of abandoned coal mine energy storage reservoirs, and the stability and safety evaluation of abandoned coal mine energy storage reservoirs. A flowchart for siting the construction of CAES reservoirs in abandoned coal mines has been established

The Data Acquisition System for the KOTO Detector

AbstractThe Data Acquisition (DAQ) for the KOTO detector is designed around a 14-bit 125MHz ADC module, which measures the energy and the time of photomultiplier pulses from about 4000 readout channels. The Trigger has a two-tiered design, with a first level decision based on the time-aligned energy sum over the entire calorimeter and a second level decision based on clustering and in-time veto signal rejection. Data accepted by the second level trigger are read out via Gigabit Ethernet and passed to a computer farm for event building and data storage

Safety and effectiveness of indocyanine green fluorescence imaging-guided laparoscopic hepatectomy for hepatic tumor: a systematic review and meta-analysis

IntroductionPrevious clinical investigations have reported inconsistent findings regarding the feasibility of utilizing indocyanine green fluorescence imaging (ICGFI) in laparoscopic liver tumor removal. This meta-analysis aims to comprehensively evaluate the safety and effectiveness of ICGFI in laparoscopic hepatectomy (LH).MethodsA systematic search of pertinent clinical studies published before January 30th, 2023 was conducted in databases including PubMed, Embase, Cochrane, and Web of Science. The search strategy encompassed key terms such as “indocyanine green fluorescence,” “ICG fluorescence,” “laparoscopic hepatectomy,” “hepatectomies,” “liver Neoplasms,” “hepatic cancer,” and “liver tumor.” Additionally, we scrutinized the reference lists of included articles to identify supplementary studies. we assessed the quality of the incorporated studies and extracted clinical data. Meta-analysis was performed using STATA v.17.0 software. Either a fixed-effects or a random-effects model was employed to compute combined effect sizes, accompanied by 95% confidence intervals (CIs), based on varying levels of heterogeneity.ResultsThis meta-analysis encompassed eleven retrospective cohort studies, involving 959 patients in total. Our findings revealed that, in comparison to conventional laparoscopic hepatectomy, patients receiving ICGFI-guided LH exhibited a higher R0 resection rate (OR: 3.96, 95% CI: 1.28, 12.25, I2 = 0.00%, P = 0.778) and a diminished incidence of intraoperative blood transfusion (OR: 0.42, 95% CI: 0.22, 0.81, I2 = 51.1%, P = 0.056). Additionally, they experienced shorter postoperative hospital stays (WMD: −1.07, 95% CI: −2.00, −0.14, I2 = 85.1%, P = 0.000). No statistically significant differences emerged between patients receiving ICGFI-guided LH vs. those undergoing conventional LH in terms of minimal margin width and postoperative complications.ConclusionICGFI-guided LH demonstrates marked superiority over conventional laparoscopic liver tumor resection in achieving R0 resection and reducing intraoperative blood transfusion rates. This technique appears to hold substantial promise. Nonetheless, further studies are needed to explore potential long-term benefits associated with patients undergoing ICGFI-guided LH.Systematic review registrationhttps://www.crd.york.ac.uk/prospero/, identifier CRD 42023398195

Estimated pulse wave velocity is associated with all-cause and cardio-cerebrovascular disease mortality in stroke population: Results from NHANES (2003–2014)

BackgroundArterial stiffness is a significant determinant and evaluation of cardio-cerebrovascular disease and all-cause mortality risk in the stroke population. Estimated pulse wave velocity (ePWV) is a well-established indirect measure of arterial stiffness. We examined the association of ePWV with all-cause and cardio-cerebrovascular disease (CCD) mortality in the stroke population in a large sample of US adults.MethodsThe study design was a prospective cohort study with data from the National Health and Nutrition Examination Survey (NHANES) from 2003 to 2014, between the ages of 18–85 years, with follow-up through December 31, 2019. 1,316 individuals with stroke among 58,759 participants were identified and ultimately, 879 stroke patients were included in the analysis. ePWV was calculated from a regression equation using age and mean blood pressure according to the following formula: ePWV = 9.587 − (0.402 × age) + [4.560 × 0.001 × (age2)] − [2.621 × 0.00001 × (age2) × MBP] + (3.176 × 0.001 × age × MBP) − (1.832 × 0.01 × MBP). Survey-weighted Cox regression models were used to assess the association between ePWV and all-cause and CCD mortality risk.ResultsThe high ePWV level group had a higher increased risk of all-cause mortality and CCD mortality compared to the low ePWV level group after fully adjusting for covariates. With an increase in ePWV of 1 m/s, the risk of all-cause and CCD mortality increased by 44%–57% and 47%–72% respectively. ePWV levels were linearly correlated with the risk of all-cause mortality (P for nonlinear = 0.187). With each 1 m/s increase in ePWV, the risk of all-cause mortality increased by 44% (HR 1.44, 95% CI: 1.22–1.69; P < 0.001). When ePWV was <12.1 m/s, an increase in ePWV per 1 m/s was associated with a 119% (HR 2.19, 95% CI: 1.43–3.36; P < 0.001) increase in CCD mortality risk; when ePWV was ≥12.1 m/s, an increase in ePWV per 1 m/s was not associated with in CCD mortality risk.ConclusionePWV is an independent risk factor for all-cause and CCD mortality in stroke patients. Higher levels of ePWV are associated with higher all-cause mortality and CCD mortality in stroke patients