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Background: Acute complete gastric volvulus is a rare and life-threatening disease, which is prone to gastric wall ischemia, perforation, and necrosis. If it is not treated by surgery in time, the mortality rate can range from 30 to 50%. Clinical presentations of acute gastric volvulus are atypical and often mimic other abdominal conditions such as gastritis, gastroesophageal reflux, gastric dilation, and pancreatitis. Imaging studies are crucial for diagnosis, with barium meal fluoroscopy being the primary modality for diagnosing gastric volvulus. Cases of acute gastric volvulus diagnosed by ultrasound are rarely reported. Case presentation: We reported a rare case of acute gastric volvulus in a 4-year-old Chinese girl who presented with vomiting and abdominal pain. Ultrasound examination revealed the "whirlpool sign" in the cardia region, raising suspicion of gastric volvulus. Diagnosis was confirmed by X-ray barium meal fluoroscopy, which indicated left-sided diaphragmatic hernia and obstruction at the cardia region. Surgical intervention confirmed our suspicion of acute complete gastric volvulus combined with diaphragmatic hernia. Conclusion: In this case, we reported an instance of acute complete gastric volvulus. Ultrasound revealed a "whirlpool sign" in the cardia, which is likely to be a key sign for the diagnosis of complete gastric volvulus. [ABSTRACT FROM AUTHOR]

Contemporary systems are trending toward 3D computer-aided design systems that integrate, network, and exhibit intelligence. The integration of parametric technology with ancient Chinese architecture can enhance the efficiency and quality of managing information on ancient buildings, thereby expanding the application scenarios of ancient architectural information models. By analyzing the construction characteristics of ancient Chinese carpentry work and modular systems, this research outlines the logic and methods for generating Chinese ancient architecture. The program’s parametric technology allows for adjusting variable parameters to produce carpentry work structures of varying scales and forms. Furthermore, this research establishes a library of parametric 3D components for ancient architecture, which can simplify the design process of contemporary antique architecture. Additionally, the parametrization of Chinese ancient architectures can function as an auxiliary tool for maintenance and repair techniques, serving as a storage mechanism for whole-life cycle information. This can enable the digital archiving of component information and model entities in an informative manner for managing existing ancient architectures.

White light-emitting diodes (WLEDs) have attracted a lot of attention for their small size, low energy consumption, and fast response time. However, developing a green material to replace the non-renewable rare earths in the preparation of WLEDs remains a big challenge at present. Here, biomass carbon dots (CDs) are compounded with polyvinyl alcohol (PVA) to obtain a solid fluorescent material that can replace rare earth phosphors for the preparation of WLEDs. Lignosulfonate CDs (L-CDs) prepared using sodium lignosulfonate as the carbon source show a unique characteristic of triple emission peaks under ultraviolet excitation. L-CDs@PVA prepared by combining CDs with PVA can overcome the aggregation-induced quenching (AIQ) effect and exhibit white fluorescence under ultraviolet (UV) due to supramolecular cross-linking. Chromaticity coordinate (CIE) analysis shows that the light coordinates emitted by L-CDs@PVA (0.297, 0.318) are very close to the standard white light coordinates (0.330, 0.330). The WLEDs were prepared by using L-CDs@PVA as a white light conversion layer, and finally, the lighting modules and backlight modules were assembled in surface mount technology for illumination and display. The cross-combination of optical materials and bioenergy has a positive effect on sustainable development. [ABSTRACT FROM AUTHOR]