Identification of staphylococcus aureus spondylitis in patients with spinal infections using machine learning based on routine laboratory tests: a multicenter retrospective study.

Rapid etiological identification of Staphylococcus aureus (S. aureus) in spinal infections can be challenging, often delaying targeted therapy. We developed a machine learning model leveraging XGBoost to predict S.

Spontaneous generation of singlet oxygen on microemulsion-derived manganese oxides with rich oxygen vacancies for efficient aerobic oxidation.

Developing innovative catalysts for efficiently activating O into singlet oxygen (O) is a cutting-edge field with the potential to revolutionize green chemical synthesis. Despite its potential, practical implementation remains a significant challenge. In this study, we design a series of nitrogen (N)-doped manganese oxides (N-MnO, where represents the molar amount of the N precursor used) nanocatalysts using compartmentalized-microemulsion crystallization followed by post-calcination.

Ultralow Doppler frequency extraction for the self-mixing dual-frequency laser velocimetry.

In self-mixing dual-frequency laser Doppler velocimetry, the self-mixing Doppler frequency shift of the optical frequency difference is a linear function of the velocity of an external dynamic object; however, it is always ultralow for signal processing. Therefore, an ultralow frequency extraction method based on artificial neural networks (NNs) is presented because NNs can accurately create a fitting function for a Doppler signal and extend the signal to the DC value, increasing the signal length and sampling points without yielding unnecessary influences on the Doppler frequency. We precisely measured Doppler frequencies in the frequency domain with a low sampling rate and calculated the velocities for a target with longitudinal movements.

Fringe double for self-mixing interference based on the narrow transmission spectrum mapping.

In this work, a novel fringe double scheme with a Fabry-Pérot (F-P) cavity is proposed for self-mixing interferometry based on the narrow transmission spectrum mapping. While the laser beam with self-mixing interference (SMI) propagates through the F-P cavity with the narrow transmission spectrum, the SMI fringe doubles as the optical frequency modulation caused by SMI sweeps the peak of the transmission spectrum of the F-P cavity completely. The doubled SMI signal is very suitable for displacement reconstruction with fringe counting and velocity monitoring with joint time-frequency analysis, since it inherits the merits of the transmission spectrum of the F-P cavity (sharp, neat, and stable).

Self-mixing birefringent dual-frequency laser Doppler velocimeter.

A self-mixing birefringent dual-frequency laser Doppler velocimeter (SBD-LDV) for high-resolution velocity measurements is presented in this paper. The velocity information of the object can be accurately extracted from the self-mixing Doppler frequency shift of the birefringent light-carried microwave signal. We generate a virtual stable light-carried microwave by using a birefringent dual-frequency He-Ne laser which further simplifies the structure of the light source.

Birefringent dual-frequency laser Doppler velocimeter using a low-frequency lock-in amplifier technique for high-resolution measurements.

A birefringent dual-frequency laser with a half-intracavity has been used to develop a laser Doppler velocimeter (LDV). The developed LDV utilizes a new signal-processing method based on a lock-in amplifier to achieve high-resolution velocity measurements and the discrimination of positive and negative velocities. Theoretical analysis and simulation results are presented.

Curcumin protects against acetaminophen-induced apoptosis in hepatic injury.

Aim: To explore the effects of curcumin (CMN) on hepatic injury induced by acetaminophen (APAP) in vivo.

Methods: Male mice were randomly divided into three groups: group I (control) mice received the equivalent volumes of phosphate-buffered saline (PBS) intraperitoneally (ip); Group II [APAP + carboxymethylcellulose (CMC)] mice received 1% CMC (vehicle) 2 h before APAP injection; Group III (APAP + CMN) mice received curcumin (10 or 20 mg/kg, ip) 2 h before before or after APAP challenge. In Groups II and III, APAP was dissolved in pyrogen-free PBS and injected at a single dose of 300 mg/kg.