Vapor-phase transport synthesis of ZnAPO-34 molecular sieve

ZnAPO-34 molecular sieve can be synthesized by the vapor-phase transport technique using triethylamine as a structure-directing agent

Predefined-time synchronization of 5D Hindmarsh–Rose neuron networks via backstepping design and application in secure communication

In this paper, the fast synchronization problem of 5D Hindmarsh–Rose neuron networks is studied. Firstly, the global predefined-time stability of a class of nonlinear dynamical systems is investigated under the complete beta function. Then an active controller via backstepping design is proposed to achieve predefined-time synchronization of two 5D Hindmarsh–Rose neuron networks in which the synchronization time of each state variable of the master-slave 5D Hindmarsh–Rose neuron networks is different and can be defined in advance, respectively. To show the applicability of the obtained theoretical results, the designed predefined-time backstepping controller is applied to secure communication to realize asynchronous communication of multiple different messages. Three numerical simulations are provided to validate the theoretical results

Travelling-Wave Modeling of Dynamics of Ultrafast Reflective-Intracavity-Filter Tunable Fabry-Pérot Lasers for Optical Coherent Tomography

The dynamics of Fabry-Pérot external-cavity laser diodes frequency-swept at a high rate using a tunable intracavity filter are investigated by travelling-wave modelling. The effect of broad and narrow bandwidth filter properties and linewidth enhancement factor of the laser performance is assessed in this project. The phenomenon of self mode locking in a laser with a broad filter is discovered and analysed

Continuous fabrication of calcium sulfate whiskers with adjustable aspect ratio in microdroplets

Hemi-hydrate and anhydrous CaSO₄ whiskers with adjustable aspect ratio were continuously synthesized by the reactive crystallization of CaCl₂ to K₂ S₂ O₈ in microdroplets. The effects of solvent and reactive temperature were examined, with SEM and XRD characterizations. Hemi-hydrate and anhydrous CaSO₄ whiskers can be, respectively, obtained in aqueous and N,N-dimethylformamide solutions at 90 °C in 180 s. The addition of ethylene glycol or glycerol as well as increasing temperature could lead to the increase in length and aspect ratio of the whiskers. Thus this preparation technique provides a simple continuous route to synthesize CaSO₄ whiskers with two kinds of crystal structures in a short time, and adjustable lengths and aspect ratios

Therapeutic efficacy of combined administration of thymosin and oxaliplatin in elderly gastric ulcer patients and its effect on cellular immunity and matrix metalloproteinase

Purpose: To investigate the clinical efficacy of thymosin combined with oxaliplatin and tiggio in aged gastric cancer (GC) sufferers, as well as their impact on cellular immunity and matrix metalloproteinase.Methods: Elderly GC sufferers (n = 82) were divided into study and control groups by random allocation (41 patients/group). Control group was treated with oxaliplatin combined with tiggio, while the study group was treated with thymopeptide injection, in addition to oxaliplatin combined with tiggio. Each treatment course lasted 21 days, and the study involved three courses. Clinical effectiveness and toxicity in the two groups were determined and compared before and after treatment.Results: Total effectiveness in the study group (73.16 %) and disease remission (95.11 %) were superior to the corresponding values for control patients given oxaliplatin and tiggio (48.78 and 85.37 %, respectively, p ˂ 0.05). There were markedly lower incidences of nausea, vomiting and leukopenia in the study group than in control (p ˂ 0.05).Conclusion: The use of thymosin-oxaliplatin-tigeo triple therapy for aged GC sufferers has a definite clinical benefits and low toxic side effects.Keywords: Thymosin, Asha Leigh Per, Teggio, Gastric cancer, Cellular immunity, Matrix metalloproteinas

Crowding Out the Crowd:The Transformation of Network Disaster Communication Patterns on Weibo

There is a surge in people turning to social media in disasters in China. In the 2010 Yushu earthquake, 5,979 Weibos were posted. Almost 10 years on, in the 2019 Yibin earthquake it was 17,495. This study presents a Social Network Analysis of the dynamics of this growth, taking the six major Chinese earthquakes of this decade as a case study. By constructing relationship matrices, the research reveals a transformation of networked crisis communication patterns on Weibo. We show how communication relationships between verified organisational users, government agencies, verified individual users (such as celebrities) and unverified ordinary users have changed, and we observe that government agencies are ‘crowding out the crowd’ of other users. We consider key aspects and the ethical complexities of this phenomenon

Feuille de route de l’indépendance tibétaine

Wang Lixiong publie « Feuille de route de l’indépendance tibétaine » sur la Toile en novembre 2008, après une accalmie relative des tensions de la révolte tibétaine du printemps 2008, et une fois les jeux Olympiques terminés(1). Il expose sa nouvelle interprétation de la question tibétaine, une approche analytique, inédite chez lui auparavant, mûrie à la lueur des événements récents. Il propose une vision novatrice de la crise tibétaine, de ses origines profondes et, finalement, de son évolution vers l’indépendance tibétaine. « Feuille de route » se compose de trois parties : 1) Ligne de démarcation : les événements de mars, 2) Le dilemme du régime impérial, 3) Comment le Tibet se dirige vers l’indépendance. La première partie a été traduite en anglais par Lingxi Kong, et largement diffusée sur le net(2). C’est pourquoi il a été décidé de traduire en français la deuxième partie qui est sans doute la plus pertinente pour comprendre la réflexion de l’auteur. Il élabore une analyse de la nature des institutions bureaucratiques et montre les apories du système. Afin de donner une vue d’ensemble de son long texte, un court résumé de la première partie précèdera la traduction. La troisième partie, non traduite ici, présente la vision de l’auteur des différents scénarios pour aboutir à l’indépendance qui selon lui ne pourra se faire qu’au prix d’une grande violence et d’effusions de sang. Au moment où cette traduction est achevée, le 13 juin 2009, TibetInfoNet annonce l’arrivée de Wang Lixiong à Dharamsala pour une visite de deux mois organisée par l’Association des écrivains tibétains(3). Note de la traductrice