Application and Evaluation of Continuous Care Model Based on the Omaha System in Stroke Patients after Discharge

[Objectives]To explore the effect of continuous nursing model based on the Omaha system on stroke patients.[Methods]A total of 40 stroke patients in the inpatient department of the Rehabilitation Department of Affiliated Hospital of Jinggangshan University were selected and divided into two groups by the random number table method.Patients in the control group were given routine nursing,and those of the observation group were given continuous nursing based on the Omaha system theory.The score of neurological impairment,daily living ability scale and the quality of life,as well as patients satisfaction rate before and after treatment were compared between the two groups.[Results]The score of neurological impairment,daily living activity ability and the quality of life,as well as patients nursing satisfaction rate in the observation group were significantly better than those of the control group,with statistical significance(P<0.05).[Conclusions]The continuous nursing model based on the Omaha system can significantly improve the neurological function of stroke patients,improve their quality of life and life ability,and promote their rehabilitation.

Optical transmitter module with hybrid integration of DFB laser diode and proton-exchanged LiNbO_(3)modulator chip

In this work,a hybrid integrated optical transmitter module was designed and fabricated.A proton-exchanged Mach–Zehnder lithium niobate(LiNbO_(3))modulator chip was chosen to enhance the output extinction ratio.A fiber was used to adjust the rotation of the polarization direction caused by the optical isolator.The whole optical path structure,including the laser chip,lens,fiber,and modulator chip,was simulated to achieve high optical output efficiency.After a series of process improvements,a module with an output extinction ratio of 34 dB and a bandwidth of 20.5 GHz(from 2 GHz)was obtained.The optical output efficiency of the whole module reached approximately 21%.The link performance of the module was also measured.

Stable graphene oxide-based lyotropic liquid crystals for interfacial lubrication

Lyotropic liquid crystals have lubricating properties due to their ordered assembly and fluidity,whose mesogens are often characterized by amphiphilic properties.Despite the attention that graphene oxide(GO)has been studied as a novel amphiphilic lyotropic mesogen this decade,and GO applied as a lubrication additive has been demonstrated in both oil and water-based systems,little research reveals the interfacial lubrication of GO liquid crystals yet.This work reports that GO aqueous dispersion can form lyotropic liquid crystals above a specific critical concentration of 5.00 mg/mL,providing a form of stable water-based lubricant,which can keep stable for several months and can reduce friction by 37.3%and wear by 25.24%.The liquid crystal phase was verified by polarizing microscope and synchrotron radiation small-angle X-ray scattering,and its rheological properties and viscoelasticity were studied by interfacial rheometer.The formation of lyotropic liquid crystals can enhance the stability of GO aqueous dispersions at high density,simultaneously ensuring friction decrease and anti-wear effect.It is attributed to the stable nematic network by the ordered GO sheets.The ordered assembly structure bears vertical shear force,therefore,reducing the wear.It is also assumed that the wide lateral size of graphene oxide promotes the nematic phase thus smoothes the graphene oxide film composed spontaneously under the coincidence of lamellar liquid crystal and 2D layered material.Through this work,the interlayer lubrication of GO was optimized,and the problem of GO dispersion sedimentation was solved by self-assembly.The range of interfacial lubrication of GO aqueous dispersion has been expanded and the synergistic effect is conducive to the environmentally friendly lubricants.

The First Case of Serogroup Y Neisseria meningitidis and An Expanded Investigation of Healthy Carriers—Shijiazhuang City,Hebei Province,China,2023

Summary What is already known about this topic?Neisseria meningitidis(Nm)is a bacterial pathogen that causes meningococcal disease.Serogroups A,B,C,W,X,and Y account for the vast majority of cases.However,invasive meningococcal disease(IMD)caused by NmY is rare in China and has been reported only in Tianjin,Guangdong,Shanghai,and Hunan provinces and cities.What is added by this report?This article reports the first case of NmY:cc23 meningococcal disease in Hebei Province,confirmed by metagenomic sequencing.We also present the results of expanded surveillance in the healthy population associated with the case.What are the implications for public health practice?NmY has caused multiple case reports across China,especially in southern cities.The first report of a serogroup Y case in Hebei Province,and the carriage rate in the healthy population,reminds us to increase public health attention on Nm.The results of this study suggest that surveillance of the Nm carriage rate among healthy carriers and serogroup changes in Nm should be strengthened.

经济“脱实向虚”与最优货币政策——基于资产组合视角的理论分析

近年来,中国货币供给保持较快增长,其中大量货币流入房地产市场,使得房地产市场长期繁荣。然而,2022年开始的房价快速回落也客观说明了此前房地产价格上涨是一种泡沫,是经济“脱实向虚”的后果。为了探究经济“脱实向虚”的内在机理,本文通过构建一个包含货币、生产资本和泡沫资产三种资产的“经济增长—资产组合”模型,探索泡沫资产对货币流向及货币政策效率的影响。模型分析结果表明,提高货币增长率具有二重效应。第一重是总量效应,即通过降低货币的实际收益率来提高家庭的非货币资产持有,进而推高储蓄率,推动经济增长。第二重是结构效应,通过影响资产组合来降低生产资本与泡沫资产的比例,加剧“脱实向虚”,抑制经济增长。当泡沫资产的风险较小时,结构效应将占主导,货币增长率的提升只会导致资金不断流向泡沫资产,阻碍经济增长。进一步的政策模拟结果表明,通过宏观审慎政策工具与货币政策相搭配,将能够防范经济“脱实向虚”,最大化社会福利。

Formulation of lyotropic liquid crystal emulsion based on natural sucrose ester and its tribological behavior as novel lubricant

The tribological behavior of oil-in-water emulsions formulated with natural lyotropic liquid crystal(LLC)emulsifiers based on natural sucrose ester was studied for the first time.Polarized optical microscopy,synchrotron radiation small-angle X-ray scattering,wide-angle X-ray scattering,and synchrotron radiation infrared microspectroscopy demonstrated that LLC emulsifiers were tightly ordered at the oil–water interface with a distinct nematic texture.The viscosity of emulsion was observed to change over time.Moreover,the zeta potential and laser particle size distribution verified the emulsion’s satisfactory stability.The frictional shearing test proved that the coefficient of friction of the emulsion versus pure oil decreased by 34.2%.The coefficient of friction of the emulsion with liquid crystal decreased 10.1%versus that without liquid crystal.Although liquid crystal emulsion did not exhibit outstanding anti-wear performance compared with pure oil,its wear volume was 29.4%less than the emulsion without liquid crystal.X-ray photoelectron spectroscopy and scanning electron microscope–energy dispersive X-ray spectroscopy(SEM–EDS)proved that the tribo-film of the emulsion with liquid crystal was formed synergistically by the liquid crystal phase with the base oil.The formulation affecting the lubricant quality was further studied by orthogonal experiments.The resulting Stribeck curve behavior suggested that proper composition with a slightly higher viscosity can better reduce friction in both boundary lubrication and mixed lubrication regimes.The lubrication mechanism indicated that the periodically ordered liquid crystal was transported to the sliding asperity in the form of emulsion droplets,which bored the pressure and released the oil to form a tribo-film.This LLC emulsion is environmentally friendly and potentially non-irritant to the skin.Thus,it has promising application prospects as novel water-based and biological lubricants.

Water lubrication of graphene oxide-based materials

Water is as an economic,eco-friendly,and efficient lubricant that has gained widespread attention for manufacturing.Using graphene oxide(GO)-based materials can improve the lubricant efficacy of water lubrication due to their outstanding mechanical properties,water dispersibility,and broad application scenarios.In this review,we offer a brief introduction about the background of water lubrication and GO.Subsequently,the synthesis,structure,and lubrication theory of GO are analyzed.Particular attention is focused on the relationship between pH,concentration,and lubrication efficacy when discussing the tribology behaviors of pristine GO.By compounding or reacting GO with various modifiers,amounts of GO-composites are synthesized and applied as lubricant additives or into frictional pairs for different usage scenarios.These various strategies of GO-composite generate interesting effects on the tribology behaviors.Several application cases of GO-based materials are described in water lubrication,including metal processing and bio-lubrication.The advantages and drawbacks of GO-composites are then discussed.The development of GO-based materials for water lubrication is described including some challenges.