[en] Objective: To determine the frequency of coronary artery lesion (CAL) in children with Kawasaki disease (KD) and to analyse the related risk factors of CAL and the predictive value of risk factors for CAL. Study Design: A descriptive study. Place and Duration of Study: Department of Pediatrics, People's Hospital of Linquan County, Anhui Province, China, from January 2019 to January 2022. Methodology: Clinical data of 71 children with KD were retrospectively analysed, including 31 in the CAL group and 40 in the non-CAL group. The age, gender, days of fever, blood routine, plasma N-terminal B-type natriuretic peptide (NT-proBNP), and Kobayashi score were registered as independent variables of all the children, and the presence or absence of CAL was used as the dependent variable. All the independent variables were subjected to univariate analysis between the groups, and those with significance in univariate analysis were further subjected to unconditional binary logistic regression analysis. A receiver operating curve (ROC) was drawn to analyse the predictive power and optimal cut-off value of related risk factors for CAL. Results: On univariate analysis, age, NT-proBNP and Kobayashi's score were closely related to CAL (all p<0.05). Multivariate analysis showed that NT-proBNP and Kobayashi scores were independent risk factors for CAL in children with KD. ROC curve analysis showed that the area under the curve (AUC) of NT-proBNP and Kobayashi scores were 0.771 and 0.732, respectively, at optimal critical values of 543.12 ng/L and 7.50 points, respectively. Conclusion: The frequency of CAL in children with KD is high. NT-proBNP and Kobayashi scores are independent risk factors for the occurrence of CAL in children with KD, and they have good predictive performance for the diagnosis of CAL. (author)

[en] Four hundred and fifty four cases of H.S.G. in infertility were analyzed and following brief results were obtained. 1. Most frequent age group was 25-29 year old, and those number of patient were 188 (41.4%). 2. Most frequent abnormal uterine findings was intravasation (113 cases), and malposition (119), irregular margin (104), filling defect (37), and diverticulum (6) in decreasing order. 3. Most frequent abnormal tubal finding was obstruction (199 cases), and hydrosalpinx (99), diverticulosis (22), intravasation (17), peritubal adhesion (13), and beaded tube (10) in decreasing order. 4. Nagative findings was seen in 155 cases (34.1%) of uterus and in 227 cases (50.0%) of fallopian tubes. 5. Nagative findings in both uterus and fallopian tubes was seen only 87 cases (19.2%)

[en] Flow and temperature fields during the solidification of hypereutectic and hypoeutectic NH₄Cl-H₂O solution in rectangular cavities were measured by a particle image velocimetry(PIV) and a weak perturbation thermocouple network, respectively. Double-diffusive convections caused by the coupling effects of temperature and solute gradients were studied by the experiment. During the solidification of hypereutectic solution, the rejected water near the solidification interface will lead to dilute solute layers and double-diffusive interfaces. As the continued rejection of water, the layer and interface will evolve into instability and a multi-layer and multi-interface structure will be formed. To the hypoeutectic solution, the rejection of NH₄Cl near the solidification interface will form a dense solute layer. When the thickness of the dense solute layer is large enough, the coupling effects of stabilizing solute gradient and unstable temperature gradient will lead to new solute layers. The solute layers and double-diffusive interfaces will evolve stably and have no breakup of the double-diffusive interfaces during the solidification of hypoeutectic solution.

[en] It is more accurate to predict the critical heat flux (CHF) from the start of churn flow rather than the start of annular flow. High-speed photography has been employed for qualitative investigation of entrainment in vertical two-phase flow under churn flow condition. This paper mainly focuses on the evolution of the flooding waves close to the water inlet section and liquid distribution in the cross-section of tube. The properties of flooding wave such as frequency and amplitude have been obtained. (author)

[en] Perturbed angular correlation of gamma rays (PAC) is applied to study the atomic structure of grain boundaries (gb) in fcc metals using nuclear quadrupole interactions. ¹¹¹In probes were diffused in samples of Au, Cu, Ni and Pt which had first been annealed to form high-angle gbs. Diffusions were carried out at such low temperatures that only gb diffusion should occur (Harrison's type-C kinetic regime), and measurements were made after removing any residual surface activity. For three Pt samples, a unique signal attributed to a gb site was detected with a site fraction of about 50%, coupling frequency ω₁ = 80.0(2) Mrad/s and electric-field-gradient asymmetry parameter η = 0. A Pt sample of 99.9995% purity exhibited much less inhomogeneous signal broadening than 99.998% pure samples, indicating the level of purity necessary to observe the gb sites via quadrupole interactions. The broadening is attributed to gb segregation. For Au, Cu and Ni, only ill-defined, non-unique signals were detected, apparently because of gb segregation. The small broadening in the high-purity Pt sample indicates a high degree of uniformity in the crystal structure of the high-angle gb sites. The large site fraction of the 80 Mrad/s signal demonstrates the dominance of a single site for Cd probes in high-angle gbs. (orig.)

No abstract available

[en] Research on the Alcator C-Mod tokamak is focused on high particle- and power-density plasma regimes to understand particle and energy transport in the core, the dynamics of the H-mode pedestal, and scrape-off layer and divertor physics. The auxiliary heating is provided exclusively by RF waves, and both the physics and technology of RF heating and current drive are studied. The momentum which is manifested in strong toroidal rotation, in the absence of direct momentum input, has been shown to be transported in from the edge of the plasma following the L-H transition, with timescale comparable to that for energy transport. In discharges which develop internal transport barriers, the rotation slows first inside the barrier region, and then subsequently outside of the barrier foot. Heat pulse propagation studies using sawteeth indicate a very narrow region of strongly reduced energy transport, located near r/a = 0.5. Addition of on-axis ICRF heating arrests the buildup of density and impurities, leading to quasi-steady conditions. The quasi-coherent mode associated with enhanced D-Alpha (EDA) H-mode appears to be due to a resistive ballooning instability. As the pedestal pressure gradient and temperature are increased in EDA H-mode, small ELMs appear; detailed modelling indicates that these are due to intermediate n peeling-ballooning modes. Phase contrast imaging has been used to directly detect density fluctuations driven by ICRF waves in the core of the plasma, and mode conversion to an intermediate wavelength ion cyclotron wave has been observed for the first time. The bursty turbulent density fluctuations, observed to drive rapid cross-field particle transport in the edge plasma, appear to play a key role in the dynamics of the density limit. Preparations for quasi-steady-state advanced tokamak studies with lower hybrid current drive are well underway, and time dependent modelling indicates that regimes with high bootstrap fraction can be produced. (author)

[en] Research on the Alcator C-Mod tokamak is focused on high particle- and power-density plasma regimes to understand particle and energy transport in the core, the dynamics of the H-mode pedestal, and scrape-off layer and divertor physics. The auxiliary heating is provided exclusively by RF waves, and both the physics and technology of RF heating and current drive are studied. The momentum which is manifested in strong toroidal rotation, in the absence of direct momentum input, has been shown to be transported in from the edge of the plasma following the L to H transition, with time scale comparable to that for energy transport. In discharges which develop internal transport barriers (ITBs), the rotation slows first inside the barrier region, and then subsequently outside of the barrier foot. Heat pulse propagation studies using sawteeth indicate a very narrow region of strongly reduced energy transport, located near r/a = 0.5. Addition of on-axis ICRF heating arrests the buildup of density and impurities, leading to quasi-steady conditions. The quasi-coherent mode associated with EDA H-mode appears to be due to a resistive ballooning instability. As the pedestal pressure gradient and temperature are increased in EDA H-mode, small ELMs appear; detailed modeling indicates that these are due to intermediate n peeling-ballooning modes. Phase Contrast Imaging (PCI) has been used to directly detect density fluctuations driven by ICRF waves in the core of the plasma, and mode conversion to an intermediate wavelength Ion Cyclotron Wave has been observed for the first time. The bursty turbulent density fluctuations, observed to drive rapid cross-field particle transport in the edge plasma, appear to play a key role the dynamics of the density limit. Preparations for quasi-steady-state Advanced Tokamak studies with lower hybrid current drive are well underway, and time dependent modeling indicates that regimes with high bootstrap fraction can be produced. (author)

[en] An analysis is carried out on the natural vibration characteristics of the main shaft system of a hydro-turbine generating set. The critical speed of rotation in different orders are calculated based on simplified real parameters and the influences of different guide bearing stiffness on the critical speed are analyzed. The results show that the up guide bearing has little influence on the critical speed; however, the down and the water guide bearings strongly affect the critical speed and to a certain extent the 'saturation' phenomenon happens; as all of these three bearings stiffness become larger at the same time, the critical speed also increases significantly. So it is necessary to consider the effect of the bearing stiffness when doing an estimation of the critical speed.

[en] As a new class of macrocyclic compounds akin to calixarenes, pillar(n)arenes have received considerable attention since the first report in 2008. The unique pillar architectures with readily funactionalizable rims provide the possibility of using them as a macrocyclic platform for preorganizing chelating groups. We have recently revealed that pillar(5)arenes functionalized with phosphine oxides (PAPO) are able to differentiate UO_2"2"+ and Th"4"+ more efficiently and selectively than their acyclic analogues from acidic media using molecular solvents. Preorganizing diglycolamide (DGA) moieties on the pillararene platform resulted in high efficiency towards partitioning of Eu(III) over Am(III) in highly acidic media. When attaching CMPO moieties to pillar(5)arenes, these homoditopic molecules exhibited efficient and selective extraction of Am(III) over Eu(III) under acidic feed conditions. A bimetallic complex was found to form in a stepwise manner via a host-guest recognition process, which is correlated to the separation process. Since we initiated the investigation of pillararene-based extractants for actinide and lanthanide separation in 2013, our follow-up reports are still limited to traditional solvent extraction systems. Our recent work demonstrated that RTIL (C_8mimNTf_2) can serve as an excellent solvent extraction system for actinide separation with pillar(5)arene-based diglycolamides (P5DGAs, L-I, L-II and L-III) as extractants. The high distribution ratios and favorable separation of Am"3"+ and Pu"4"+ in nitric acid media were observed. Particularly, a unique competitive displacement mechanism associated with host-guest interactions in the extraction process was proposed based on NMR technique and DFT calculations. These results suggest the promising use with pillar(5)arene-based extractants for separation of actinides and lanthanides at high acidity. (author)