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The late third-millennium BC Longshan period was a crucial time for state formation in central China. During these centuries, long-distance networks expanded and shared material culture and then cultural practices spread across wider areas precipitating social and ideological developments that presaged the rise of states and cities on the Central Plain. In this research, the authors use multiple (strontium, oxygen and carbon) isotope analyses from the dental enamel of 67 individuals buried at the Xiajin cemetery, Shanxi Province. The results indicate significant long-distance migration among females during the Longshan period, which the authors interpret as evidence of exogamous marriage for political alliance-building--a phenomenon found more widely across Eurasia at the start of the Bronze Age. Keywords: central China, Neolithic, Bronze Age, Taosi culture, burial, isotopic analysis, migration, exogamy, Introduction The Longshan period (c. 2500-1900 BC) was a crucial time for state formation in central China. During this period, inter-regional networks developed rapidly, transmitting shared material forms and cultural [...]

In this work, an image classification based on deep learning for quantitative field determination of aluminum ions (Al.sup.3+) was developed. Carbon quantum dots with yellow fluorescence were synthesized by a one-pot hydrothermal method which could specifically recognize Al.sup.3+ and produce enhanced green fluorescence. Using the convolutional neural network model in deep learning, an image classification was constructed to classify Al.sup.3+ samples at different concentrations. Then, a fitting method for classification information was proposed for the first time which could convert discontinuous, semi-quantitative concentration classification information into continuous, quantitative, and accurate concentration information. Recoveries of 92.0-110.3% in the concentration range of 0.3-320 [mu]M were obtained with a lower limit of detection of 0.3 [mu]M, exhibiting excellent accuracy and sensitivity. It could be completed in 2 min simply without requiring large equipment. Thus, the deep learning-enabled image classification paves a new way for the determination of metal ions., Author(s): Ce Wang [sup.1] , Zhaoliang Wang [sup.2] , Yifei Lu [sup.1] , Tingting Hao [sup.1] , Yufang Hu [sup.1] , Sui Wang [sup.1] , Zhiyong Guo [sup.1] Author Affiliations: [...]

Objective To describe a tobacco cessation intervention using personalized mobile phone text messages based on behaviour change theory and to assess why the intervention was effective. Methods We conducted a two-arm, double-blind, randomized controlled trial in five cities in China from April to July 2021. We recruited daily or weekly smokers aged 18 years or older. The 90-day intervention was delivered using a mobile phone chat application. At different stages of quitting, intervention group participants received personalized text messages based on analyses of the strength of their intention to quit, their motivation to quit and their self-reported success at quitting. Control group participants received non-personalized text messages. The primary outcome was the biochemically verified 6-month abstinence rate. Secondary outcomes were changes in scores on the components of protection motivation theory. All analyses were by intention to treat. Findings We randomly assigned 722 participants to intervention or control groups. Biochemically verified continuous abstinence at 6 months was 6.9% (25/360) in the intervention group and 3.0% (11/362) in the control group. Smokers who received the personalized intervention had lower scores on intrinsic rewards of smoking and response costs of quitting in the protection motivation theory analysis. These two variables were also determinants of sustained abstinence, thus explaining why the intervention group had a higher quitting rate. Conclusion The study confirmed the psychological determinants of long-term abstinence from smoking and provided a framework to explore why such an intervention is effective. This approach may be applicable to the development or analysis of interventions targeting other health behaviours. Objectif Presenter une intervention de sevrage tabagique articulee autour de messages SMS envoyes sur les telephones mobiles et personnalises en fonction de la theorie du changement de comportement, puis determiner pourquoi cette intervention a porte ses fruits. Methodes Nous avons mene un essai controle randomise en double aveugle et a deux volets dans cinq villes de Chine entre avril et juillet 2021. Nous avons recrute des fumeurs quotidiens ou hebdomadaires ages de 18 ans et plus. L'intervention, qui s'etalait sur 90 jours, s'est deroulee par l'intermediaire d'une application de chat sur telephone mobile. A differents stades du sevrage, les participants du groupe d'intervention ont recu des messages SMS personnalises bases sur une analyse de leur degre de volonte et de leur motivation a arreter de fumer, mais aussi de leurs capacites autodeclarees a y parvenir. De leur cote, les participants du groupe de controle ont recu des messages SMS non personnalises. Le taux d'abstinence a six mois verifie par test biochimique constituait le critere d'evaluation principal. Les criteres d'evaluation secondaires etaient l'evolution des scores au niveau des composantes de la theorie de la motivation a la protection. Toutes les analyses reposaient sur l'intention de traiter. Resultats Nous avons reparti aleatoirement 722 participants entre groupes d'intervention et de controle. Le taux d'abstinence a six mois verifie par test biochimique s'elevait a 6,9% (25/360) au sein du groupe d'intervention et a 3,0% (11/362) au sein du groupe de controle. Dans le cadre de l'analyse fondee sur la theorie de la motivation a la protection, les fumeurs ayant fait l'objet d'une action personnalisee ont obtenu des scores plus faibles en matiere de recompense intrinseque provoquee par le tabagisme et de couts d'intervention du sevrage. Ces deux variables se sont egalement revelees decisives dans l'abstinence prolongee, ce qui explique pourquoi le groupe d'intervention a affiche un taux de sevrage plus consequent. Conclusion L'etude a confirme l'impact des determinants psychologiques de l'abstinence a long terme et fourni des pistes d'exploration des raisons pour lesquelles une telle action est efficace. Cette approche pourrait etre utilisee dans le developpement ou l'analyse d'interventions ciblant d'autres comportements lies a la sante. Objetivo Describir una intervencion para dejar de fumar mediante el uso de mensajes de texto personalizados para telefonos moviles basada en la teoria del cambio de conducta y evaluar por que la intervencion fue eficaz. Metodos Se realizo un ensayo aleatorizado, con enmascaramiento doble y con dos grupos en cinco ciudades de China entre abril y julio de 2021. Se preseleccionaron fumadores diarios o semanales mayores de 18 anos. La intervencion de 90 dias se realizo mediante una aplicacion de chat para telefonos moviles. En las diferentes etapas de abstinencia, los participantes del grupo de intervencion recibieron mensajes de texto personalizados segun los analisis de la fuerza de su intencion de dejar de fumar, su motivacion para dejar de fumar y su exito autoinformado al dejar de fumar. Los participantes del grupo comparativo recibieron mensajes de texto no personalizados. El criterio de valoracion principal fue la tasa de abstinencia verificada mediante pruebas bioquimicas a los 6 meses. Los criterios de valoracion secundarios fueron los cambios en las puntuaciones de los componentes de la teoria de la motivacion de proteccion. Todos los analisis se realizaron por intencion de tratar. Resultados Se asignaron aleatoriamente 722 participantes a los grupos de intervencion o comparativos. La abstinencia continua verificada mediante pruebas bioquimicas a los 6 meses fue del 6,9% (25/360) en el grupo de intervencion y del 3,0% (11/362) en el grupo comparativo. Los fumadores que recibieron la intervencion personalizada tuvieron puntuaciones mas bajas en las recompensas intrinsecas de fumar y en los costes de respuesta de dejar de fumar en el analisis de la teoria de la motivacion de proteccion. Estas dos variables tambien fueron determinantes de la abstinencia prolongada, lo que explica por que el grupo de intervencion tuvo una tasa de abstinencia mas elevada. Conclusion El estudio confirmo los determinantes psicologicos de la abstinencia del tabaco a largo plazo y proporciono un marco para explorar por que una intervencion de este tipo es eficaz. Este enfoque podria aplicarse al desarrollo o analisis de intervenciones dirigidas a otros habitos saludables., Introduction Tobacco use is still a major public health problem worldwide. The most common type of tobacco use is cigarette smoking, which is one of the leading preventable causes of [...]