642 research outputs found
Introduzione all'Opera,
No full textlessicografia cinese e sua positiva apertura democratica per lo studio universitari
sj-pdf-1-jcb-10.1177_0271678X231200117 - Supplemental material for Prediction of early neurological deterioration in acute ischemic stroke patients treated with intravenous thrombolysis
No full textSupplemental material, sj-pdf-1-jcb-10.1177_0271678X231200117 for Prediction of early neurological deterioration in acute ischemic stroke patients treated with intravenous thrombolysis by Tian Tian, Lanjing Wang, Jiali Xu, Yujie Jia, Kun Xue, Shuangfeng Huang, Tong Shen, Yumin Luo, Sijie Li and Lianqiu Min in Journal of Cerebral Blood Flow & Metabolism</p
HSK zai Yidali hanyu jiaoxue fazhan jincheng zhong de zuoyong - HSK zai Yidali Milan de 12 nian (Il ruolo dell'esame HSK nel processo di sviluppo della didattica della lingua cinese in Italia: 12 anni di esami HSK a Milano)
No full textModulation of molecular mobility in sucrose-based amorphous solids detected by phosphorescence of erythrosin B
No full textThis project studied the temperature and composition dependence of molecular mobility in amorphous sucrose. Phosphorescence of erythrosin B provided parameters sensitive to localized molecular mobility in the glass and to more global modes of mobility activated at the glass transition and provided evidence of dynamic site heterogeneity in amorphous sucrose solids. In sucrose-based binary matrices, plasticizer (glycerol), salts (NaCl, CaCl2, MgCl2, Na-citrate, Na-acetate, Na-phosphates), maltodextrins (DE 5 to 18), protein (gelatin), and polysaccharides (xanthan and high amylose starch) were selected to investigate how variations in nature and content of each additive influence the molecular mobility as well as dynamic site heterogeneity in amorphous sucrose matrix.
Measurements of phosphorescence intensity, lifetime, and emission energy were made in amorphous sucrose-additive films containing the probe erythrosin B. Results showed the complex effects of additives on the mobility in a hydrogen-bonded sugar matrix. Glycerol exhibited an antiplasticization effect shown as decreased mobility at glycerol/sucrose mole ratio ≤ 0.27 and at temperature ≤ 45° C. On the contrary, all the polymers studied, including gelatin, xanthan and high amylose starch, displayed a ‘plasticization’ effect (increasing mobility) at very low while a rigidification effect (decreasing mobility) at higher concentration without significant change in Tg. Maltodextrins, mixtures of molecules with a variety of molecular weights, increase the mobility in spite of their high Tg. Sodium chloride showed a strong rigidification effect on the sucrose matrix; however, this effect was weakened at mole ratio NaCl/sucrose above 0.5. Other salts showed effects resulting from a compromise between two opposite actions (decreasing mobility due to salt itself and increasing mobility due to absorbed moisture). All above behaviors are difficult to interpret using Tg alone. Molecular mobility appears to be more accurate to evaluate the physical stability of the matrix.
Phosphorescence of erythrosin B was also able to report dynamic site heterogeneity that is an intrinsic property of the amorphous solid state. The heterogeneity was be evaluated by the variation of lifetime and lifetime heterogeneity across the excitation and emission band and the temperature dependence of bandwidth and lifetime heterogeneity. The composition influence on the dynamic site heterogeneity was discussed as well.Ph.D.Includes bibliographical references
Campus France programmes de soutien à la mobilité des chercheurs
No full text Les candidatures pour les programmes de soutien à la mobilité des chercheurs de Campus France sont ouverts. Il y a deux programmes: - Découverte Chine: premier contact avec la recherche chinoise - Xu Guangqi : soutien aux échanges scientifiques amorcés. Les infos sont disponibles sur : https://www.campusfrance.org/fr/decouverte-chine https://www.campusfrance.org/fr/xuguangq
RETHINKING INDUSTRIAL POLICY
No full textDespite the hold of the neoliberal orthodoxy on policy making in developing countries, industrial policy remains important for the promotion of industrial development. However, the context for the design of industrial policy has profoundly changed as a result of new rules governing international trade, the rise of global value chains and marketing networks, and other aspects of globalization. Traditionally, the case for industrial policy has been framed in terms of “market failures” but the paper argues that that is not a sufficient basis. After addressing the traditional points of criticism, an attempt is made to outline the “domains” of industrial policy in the current circumstances, especially for industrially lagging countries. As country contexts differ widely there are no satisfactory blueprints for policy making that countries can readily adopt. As in production decisions, considerable ingenuity and innovation is needed in designing policies. This is all the more necessary as the WTO rules have become increasingly stringent and the rise of international trading networks has created new barriers for young firms to enter the world market. These developments have changed the context but not the importance of policy in industrial development. The paper identifies areas where government intervention is needed and can still make a positive difference.
The Impact of Infection Control Policies on Hospital Acquired Infections by MDROs from 2016 to 2023
No full textYichen Wang,1,* Yibo Zhang,1,* Qun Wang,1 Wenhui Li,1 Dake Shi,1 Yumin Xu1,2 1Department of Hospital Infection Management, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People’s Republic of China; 2Department of Infectious Diseases, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People’s Republic of China*These authors contributed equally to this workCorrespondence: Yumin Xu, Email [email protected]: Hospital-acquired infections (HAIs) caused by multidrug-resistant organisms (MDROs) pose a significant challenge to healthcare systems. The present study aimed to evaluate the impact of the infection policy to COVID-19 on the incidence of HAIs caused by MDROs.Methods: We conducted an eight-years retrospective analysis at a hospital in Shanghai, China. Bloodstream, sputum, and urinary tract cultures of MDROs obtained 48h after admission were collected monthly from January 2016 to Dec 2023. Occupied bed days (OBDs) were used to generate monthly HAI incidences per 10,000 OBDs. The study period was divided into pre-control, in-control, and post-control cohorts, in January 2020 and January 2022. The incidence was compared using interrupted time-series regression.Results: In total, 6763 MDRO cultures were identified, comprising 1058 bloodstream, 4581 sputum, and 1124 urine cultures derived from 4549 patients. The incidence rates of all HAIs were 8.68 per 10,000 OBDs in the pre-control cohort, 9.76 per 10,000 OBDs in the in-control cohort and 12.58 per 10,000 OBDs in the post-control cohorts, respectively. A downward trend in the incidence of HAI was observed in the post-control cohort (p< 0.05).Conclusion: This study demonstrates that while the COVID-19 pandemic poses a significant challenge to infection control within hospitals, it provides a unique opportunity to enhance infection control measures and evaluate their effectiveness. In addition, these findings highlight the need for more targeted prevention and control strategies against different pathogens in future epidemics.Keywords: hospital required infection, multidrug-resistant organism, infection control, policy, Covid-19, surveillanc
A RE-EXAMINATION OF THE ARCHITECTURE OF THE INTERNATIONAL ECONOMIC SYSTEM IN A GLOBAL SETTING: ISSUES AND PROPOSALS
No full textThe globalization of the world economy poses major challenges to the prevailing international economic system. The recent trade-investment system raises the issues of the marginalization of countries, firms, and agents if they are not capable to compete with large successful entities. The system engenders conflicts of interest in its interfacing with sovereign domains. In numerous cases such as employment and mutual trade benefits, it can produce zero sum outcomes. Consequently, significant segments of public opinion in many countries have mobilized against it. In the monetary and financial area, the system has from 1945 evolved on a piecemeal and ad hoc basis. In recent years, it has not been able to predict, prevent or effectively deal with financial crisis. It demonstrates a lacuna in global financial governance especially with respect to enforcing its rules on the major countries and bringing the private sector therein. The central institution, the IMF, is shown to be in need of basic reforms involving forging a global vision, reconsidering and updating conditionality, further democratization of political governance, and revamping the exchange rates and surveillance functions.
Multi-energy microgrid optimal operation
No full textWith the increasing demand for global energy, multi-energy microgrids have drawn more attention in recent years. In a multi-energy microgrid (MEMG), different kinds of energies like heat, electricity, cooling, and gas are interacted with each at various levels, aiming to increase the overall energy utilization efficiency. MEMG usually contains many different generation units and ancillary components like combined heat and power (CHP) plant, photovoltaic cell (PV), wind turbine (WT), electric boiler (EB), fuel cell (FC), energy storage (ES) and so on. Since the operational properties and technical limits are quite different, how to optimally dispatch these units is a key research topic in this area.
Besides, the properties of these energy networks are also different. For instance, we usually assume that electricity can be delivered to customers immediately without any time delay. However, in the heat network, thermal energy is transferred by hot water in pipes. Since the flow rate of hot water is much slower than the transmission speed of electricity, there is a transmission delay ranging from minutes to hours in the heat network. Thus, it is valuable to consider the transferring time delay in MEMG. What’s more, the uncertainties of renewable energy resources pose a significant challenge to the operation of MEMG.
The focus of this research topic is to propose a suitable coordinated operation method for MEMG with coupled heat and electrical networks, in which the specific models of electrical network and heat network are systematically studied. Further, demand response management (DRM) and the randomness of renewable energy resources are considered in the proposed method to better operate MEMG.
All the proposed operation and planning methods have been verified in simulation using GAMS and HOMER. The proposed method is simulated on a MEMG with coupled heat and electrical network, which is based on the IEEE 33-bus radial distribution network and a 13-pipe DHN.Master of Engineerin
Optimal operation of combined cooling heat and power (CCHP) systems in future energy networks
No full textWith the rapid development of energy internet, distributed energy resources and energy storage technology, the relationship between cooling, heat and power energy is getting closer and closer. It is evitable that combined cooling, heat and power energy (CCHP) system being widely used in the future. To optimize the operation of CCHP system, this study established a model of CCHP-based microgrid, considering energy storage, operation characteristics of different units and time-of-use electricity prices. Optimization methods based on PSO algorithm and Lingo software were used to minimize the total operational costs of microgrid in the scheduling period. Besides, comparison and discussion were made on three separate scheduling modes of microgrid in order to find the best and most cost-saving mode. The results of calculation indicate that the model established in this paper could effectively reduce the operational costs. Hoping that the outcome of this paper could serve as a reference for future studies on CCHP system-based microgrid.Bachelor of Engineerin
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