检索结果-南通市图书馆

Red-emitting tetraphenylethylene derivative with aggregation-induced enhanced emission for luminescent solar concentrators:A combined experimental and density functional theory study

Aggregate

引用

Aggregate 2022年第2期3卷 177-186页

作者： cosimo micheletti Qinfan Wang Francesco Ventura Michele Turelli Ilaria Ciofini Carlo Adamo Andrea Pucci Department of Chemistry and Industrial Chemistry University of PisaPisaItaly École nationale supérieure de chimie de Paris Centre national de la recherche scientifiqueInstitute of Chemistry for Life and Health SciencesPSL Research UniversityParisFrance Institut Universitaire de France ParisFrance

This study examines the use of an aggregation-induced enhanced emission fluorophore(TPE-MRh)to prepare red-emitting luminescent solar concentrators(LSCs)based on poly(methyl methacrylate)(PMMA)and poly(cyclohexyl methacrylate)(PCMA).TPE-MRh is a tetraphenylethylene(TPE)derivative bearing two dimethylamino push groups and a 3-methyl-rhodanine pull moiety,with absorption maxima at around 500 nm and fluorescence peak at 700 nm that strongly increases in ***-MRh displays a typical crystallizationinduced enhanced emission that has been rationalized by modeling the compound behavior in solution and solid-state via density functional theory calculations with the inclusion of the ***-MRh dispersed into 5×5 cm2 polymer films with a thickness of 25±5μm has revealed a partial fluorescence quenching with fluorophore *** yields(QYs)below 10%for the 2 wt.%of doping have been addressed to the formation of less emissive micro-sized clusters of *** slabs with the same surface size but 3 mm of thickness and 200 ppm of TPE-MRh have provided QY of 36.5%thanks to the attenuation of the detrimental effects of fluorophore *** feature is reflected in the LSCs performance,with devices achieving the largest power collected by the photovoltaic cell.

关键词： aggregation-induced enhanced emission density functional theory luminescent solar concentrators poly(methyl methacrylate) tetraphenylethylene core

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Emission or scattering?Discriminating the origin of responsiveness in AIEgen-doped smart polymers using the TPE dye

Aggregate

引用

Aggregate 2023年第6期4卷 85-94页

作者： Valentina A.Dini Damiano Genovese cosimo micheletti Nelsi Zaccheroni Andrea Pucci Chiara Gualandi Department of Chemistry“Giacomo Ciamician” University of BolognaBolognaItaly INSTM UdR of Bologna University of BolognaBolognaItaly Department of Chemistry and Industrial Chemistry University of PisaPisaItaly INSTM UdR of Pisa University of PisaPisaItaly Health Sciences and Technologies(HST)CIRI University of BolognaOzano Emilia BolognaItaly Advanced Applications in Mechanical Engineering and Materials Technology CIRI University of BolognaBolognaItaly

Aggregation-induced emission(AIE)luminogens are attractive dyes to probe poly-mer properties that depend on changes in chain mobility and free *** embedded in polymers the restriction of intramolecular motion(RIM)can lead to their photoluminescence quantum yield(PLQY)strong enhancement if local microviscosity increases(lowering of chain mobility and free volume).Nonethe-less,measuring PLQY during stimuli,*** or mechanical stress,is technically challenging;thus,emission intensity is commonly used instead,assuming its direct correlation with the ***,by usingﬂuorescence lifetime as an absoluteﬂuorescence parameter,it is demonstrated that this assumption can be invalid in many commonly encountered *** this aim,different poly-mers are loaded with tetraphenylenethylene(TPE)and characterized during the application of thermal and mechanical stress and physical *** these con-ditions,polymer matrix transparency variation is observed,possibly due to local changes in refractive index and to the formation of *** combin-ing different characterization techniques,it is proved that scattering can affect the apparent emission intensity,while lifetime measurements can be used to ascertain whether the observed phenomenon is due to modiﬁcations of the photophysi-cal properties of AIE dyes(RIM effect)or to alterations in the matrix optical properties.

关键词： AIE luminogens glass transition mechanochromism physical aging scattering smart polymer

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chestnut tannin:New use,research and bioeconomy

引用

Journal of Bioresources and Bioproducts 2024年第3期9卷 246-252页

作者： Rosaria Ciriminna Francesco Meneguzzo Giovanna Li Petri cosimo Meneguzzo Giuseppe Angellotti Mario Pagliaro Istituto per lo Studio dei Materiali Nanostrutturati CNRvia U.La Malfa 15390146 PalermoItaly Istituto per la Bioeconomia CNRvia Madonna del Piano 1050019 Sesto Fiorentino(FI)Italy HyRes Srl via Salvator Rosa 1882100 BeneventoItaly

Chestnut tannin,extracted from the bark or wood of chestnut trees,possesses unique properties that make it valuable in various *** serves as a natural source of tannins,which are widely used in the production of leather,textiles,and wood *** research continues to explore its potential applications,chestnut tannin remains a promising resource with diverse industrial *** new use,research and bioeconomy aspects,this study provides a unified perspective on chestnut *** advanced applications will likely emerge shortly.

关键词： Tannin Chestnut Bioeconomy Tannin market Hydrolysable tannin

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frequency stabilization of C-band semiconductor lasers through a SiN photonic integrated circuit

引用

Photonics Research 2024年第8期12卷 1619-1626页

作者： ALESSANDRO BRUGNONI ALI EMRE KAPLAN VALERIO VITALI KYLE BOTTRILL MICHELE RE PERIKLIS PETROPOULOS cosimo LACAVA ILARIA CRISTIANI Photonics Group Department of ElectricalComputer and Biomedical EngineeringUniversity of PaviaPavia 27100Italy Optoelectronics Research Centre University of SouthamptonSouthampton SO171BJUK Huawei Technologies Italia S.r.l Centro direzionale MilanoSegrate 20054Italy

Integrated semiconductor lasers represent essential building blocks for integrated optical components and circuits and their stability in frequency is fundamental for the development of numerous frontier applications and engineering *** dense optical circuits are considered,the stability of integrated laser sources can be impaired by the thermal cross-talk generated by the action of neighboring components,leading to a deterioration of the long-term system performance(on the scale of seconds).In this work we show the design and the experimental characterization of a silicon nitride photonic integrated circuit(PIC)that is able to frequency stabilize 16semiconductor lasers,simultaneously.A stabilized 50 GHz-spaced two-channel system is demonstrated through the detection of the related beating note and the stability of the resulting waveform is characterized via the use of artificially induced thermal cross-talk stimuli.

关键词： stabilization stability impaired

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A Note on Black Hole Information Paradox in de Sitter Spacetimes

引用

Communications in Theoretical Physics 2009年第7期52卷 78-80页

作者： cosimo Bambi Department of Physics and Astronomy Wayne State University Michigan Center for Theoretical Physics University of Michigan

The possibility of stable or quasi-stable Planck mass black hole remnants as solution to the black hole information paradox is commonly believed phenomenologically unacceptable. Since we need a black hole remnant for every possible initial state, the number of remnants is expected to be infinite and that would lead to remnant pair production in any physical process with a total available energy roughly exceeding the Planck mass. In this note I point out that a positive cosmological constant of the Universe would naturally lead to an upper bound on the number of possible remnants.

关键词： black hole information theory evaporation cosmological constant

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

5-ASA in ulcerative colitis:Improving treatment compliance

引用

World Journal of Gastroenterology 2009年第35期15卷 4353-4355页

作者： cosimo Prantera Marina Rizzi Department of Gastroenterology Azienda Ospedaliera San Camillo-ForlaniniCirconvallazione Gianicolense 8700152 RomeItaly Department of Gastroenterology University Campus Bio Medicovia Alvaro del Portillo 20000128 Rome Italy

5-aminosalicylic acid(5-ASA)compounds are a highly effective treatment for ulcerative colitis(UC).While UC patient compliance in clinical studies is over 90%, only 40%of patients in every day life take their prescribed *** to medication has been emphasized recently by a Cochrane meta-analysis that has suggested that future trials of 5-ASA in UC should look at patient compliance rather than drug efficacy. Better compliance can be obtained by reducing the number of tablets and times of *** that the 5-ASA formulations have different delivery systems that split the active moiety in various regions of the intestine,it is particularly important that an adequate dose of the drug arrives at the inflamed part of the colon.5-ASA Multi matrix(MMx)is a novel,high strength(1.2 g),oral formulation designed for oncedaily *** releases the active moiety throughout the *** studies with this compound have shown that it is as effective as 5-ASA enema in the treatment of mild-to-moderate,left-sided UC,and is comparable to a pH-dependent,delayed release 5-ASA (Asacol ),even if given once ***,the effectiveness in the acute phase of UC has been confirmed also in *** conclusion,at present,5-ASA MMx seems theoretically the best agent for maintaining patient compliance,and consequently,treatment effectiveness.

关键词： 5-aminosalicylic acid Mesalamine Multi matrix Patient compliance Ulcerative colitis

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Electricity demand, GDP and employment： evidence from Italy

引用

Frontiers in Energy 2014年第1期8卷 31-40页

作者： cosimo MAGAZZINO Department of Political Sciences Roma Tre University via G. Chiabrera199 00145 Rome Italy

This paper applies time series methodologies to examine the causal relationship among electricity demand, real per capita GDP and total labor force for Italy from 1970 to 2009. After a brief introduction, a survey of the economic literature on this issue is reported, before discussing the data and introducing the econometric techniques used. The results of estimation indicate that one cointegrating relationship exists among these variables. This equilibrium relation implies that, in the long-run, GDP and labor force are correlated negatively, as well as GDP and electricity. Moreover, there is a bi-directional Granger causality flow between real per capita GDP and electricity demand; while labor force does not Granger- cause neither real per capita GDP nor electricity demand. This implies that electricity demand and economic growth are jointly determined at the same time for the Italian case. The forecast error variance decomposition shows that forecast errors in real per capita GDP are mainly caused by the uncertainty in GDP itself, while forecast errors in labor force are mainly resulted from the labor force itself, although aggregate income and electricity are important, too.

关键词： energy policies electricity demand GDP,labor force stationarity structural breaks cointegration,causality Italy

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Analysis of smart contracts balances

引用

Blockchain(Research and Applications) 2021年第3期2卷 46-67页

作者： cosimo Laneve Claudio Sacerdoti Coen Department of Computer Science and Engineering University of BolognaINRIA FocusBologna40126Italy

We define a technique for analyzing updates of smart contracts balances due to transfers of digital *** analysis addresses a lightweight smart contract language and consists of a two-step ***,we define the input-output behaviors of smart contract functions by means of a simple functional language with static *** we associate the terms of this intermediate language with cost equations that compute the loss or gain of digital *** resulting equations can be fed to an off-the-shelf cost analyzer to provide upper bounds to the loss or *** analysis has been prototyped and we report its assessments and discuss extensions with additional features.

关键词： Smart contracts Blockchain Static analysis Cost analysis Cryptocurrency Movements

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Staging chronic pancreatitis with exocrine function tests: Are we better?

引用

World Journal of Gastroenterology 2017年第38期23卷 6927-6930页

作者： cosimo Sperti Lucia Moletta Department of Surgery Oncology and Gastroenterology 3rd Surgical Clinic University of Padua

Chronic pancreatitis(CP) is an inflammatory disease of the pancreas evolving in progressive fibrotic disruption of the gland with exocrine and endocrine pancreatic insufficiency. Although imaging features of CP are well known, their correlation with exocrine pancreatic function tests are not obvious, particularly in the early stage of the disease. There are many clinical classification of CP, all suggested for better distinguish and manage different forms based on etiological and clinical factors, and severity of the disease. Recently, a new classification of CP has been suggested: the M-ANNHEIM multiple risk factor classification that includes etiology, stage classification and degree of clinical severity. However, more accurate determination of clinical severity of CP requires a correct determination of exocrine function of the pancreas and fecal fat excretion. Recently, Kamath et al demonstrated that the evaluation of exocrine pancreatic function by acid steatocrit and fecal elastase-1(EF-1) was helpful, but EF-1 was able to detect exocrine pancreatic insufficiency in more patients, upgrading some patients in higher stage of disease according to M-ANNHEIM classification. So, EF-1 is a more accurate test to determine exocrine pancreatic insufficiency and to stage chronic pancreatitis in the M-ANNHEIM classification. On the contrary, EF-1 determination shows low sensitivity in detecting exocrine pancreatic insufficiency in early stage of the disease.

关键词： Chronic pancreatitis Exocrine pancreatic insufficiency Fecal elastase-1 Pancreatic function tests Steathorrea

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Practical Implementation and Operational Experience of Dynamic Mode Decomposition in Wide-area Monitoring Systems of Italian Power System

引用

Journal of Modern Power Systems and Clean Energy 2023年第3期11卷 793-802页

作者： Andrea Vicario Alberto Berizzi Giorgio Maria Giannuzzi cosimo Pisani Department of Energy at Politecnico di Milano MilanItaly Terna S.p.A. RomeItaly

This study presents the assumptions and strategies for the practical implementation of the dynamic mode decomposition approach in the wide-area monitoring system of the Italian transmission system operator,*** procedure setup aims to detect poorly damped interarea oscillations of power *** mode decomposition is a data-driven technique that has gained increasing attention in different fields;the proposed implementation can both characterize the oscillatory modes and identify the most influenced *** study presents the results of its practical implementation and operational experience in power system *** focuses on the main characteristics and solutions identified to reliably monitor the interarea electromechanical modes of the interconnected European power ***,conditions to issue an appropriate alarm in case of critical operating conditions are *** effectiveness of the proposed approach is validated by its application in three case studies:a critical oscillatory event and a short-circuit event that occurred in the Italian power system in the previous years,and a 15-min time interval of normal grid operation recorded in March 2021.

关键词： Power system control power system dynamics wide-area monitoring system(WAMS) dynamic mode decomposition

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：