INCREASE OF EFFICIENCY OF Li+-INTERCALATED CURRENT GENERATION IN SUPRAMOLECULAR ENSEMBLES WITH HIERARCHICAL ARCHITECTURE MCM-41〈HYDROQUINONE〉

2013 ◽  
Vol 12 (05) ◽  
pp. 1350037
Author(s):  
D. V. MATULKA ◽  
I. I. GRYGORCHAK ◽  
B. A. LUKIYANETS
Keyword(s):  
Diffusion Coefficient ◽  
Theoretical Model ◽  
Hierarchical Structure ◽  
Hierarchical Architecture ◽  
Discharge Process ◽  
Current Generation ◽  
Cathode Process ◽  
Discharge Curve ◽  
Supramolecular Ensembles ◽  
Mcm 41

Double-matrix hierarchical structure of the 〈molecular-lattice matrix MCM-41〈hydroquinone〉〉 is synthesized. Its use in the cathode process in the Li +-intercalation current generation showed a significant improvement in the structure of the discharge curve and the practical constancy of diffusion coefficient throughout the discharge process. Theoretical model describing the peculiarities of observed characteristics in the structure is presented.

MCM-41@ZIF-8/PDMS hybrid membranes with micro- and nanoscaled hierarchical structure for alcohol permselective pervaporation

2015 ◽  
Vol 153 ◽  
pp. 146-155 ◽  
Author(s):  
Naixin Wang ◽  
Guixiong Shi ◽  
Jing Gao ◽  
Jie Li ◽  
Lin Wang ◽  
...  
Keyword(s):  
Hierarchical Structure ◽  
Hybrid Membranes ◽  
Mcm 41

A poly-(styrene-acrylonitrile) copolymer-derived hierarchical architecture in electrode materials for lithium-ion batteries

2016 ◽  
Vol 4 (29) ◽  
pp. 11481-11490 ◽  
Author(s):  
Lu Jin ◽  
Guobo Zeng ◽  
Hua Wu ◽  
Markus Niederberger ◽  
Massimo Morbidelli
Keyword(s):  
Lithium Ion Batteries ◽  
Hierarchical Structure ◽  
Anode Materials ◽  
Electrode Materials ◽  
Lithium Ion ◽  
Hierarchical Architecture ◽  
Acrylonitrile Copolymer ◽  
General Methodology ◽  
Styrene Acrylonitrile

A general methodology is proposed to produce active cathode/anode materials for lithium-ion batteries with a hierarchical structure.

Vanadium- and chromium-containing mesoporous MCM-41 molecular sieves with hierarchical structure

2001 ◽  
Vol 43 (2) ◽  
pp. 227-236 ◽  
Author(s):  
Z.Y. Yuan ◽  
J.Z. Wang ◽  
Z.L. Zhang ◽  
T.H. Chen ◽  
H.X. Li
Keyword(s):  
Hierarchical Structure ◽  
Molecular Sieves ◽  
Mcm 41

scholarly journals Quality And Prosumership. Proserv: A New Tool For Measuring The Customer Satisfaction

2017 ◽  
Vol 18 (3) ◽  
pp. 409-426
Author(s):  
Enrico Ciavolino ◽  
Sergio Salvatore ◽  
Piergiorgio Mossi ◽  
Marta Vernai
Keyword(s):  
Theoretical Model ◽  
Customer Satisfaction ◽  
Service Quality ◽  
Hierarchical Structure ◽  
Quality Model ◽  
Global Satisfaction ◽  
Satisfaction Index ◽  
Fundamental Part ◽  
Path Modelling ◽  
Constitutive Components

The current paper aims to present a new modelfor assessingthe Customer Satisfaction. The model, named Prosumership Service Quality Model (PROSERV), can be seen as an extension ofthe European Customer Satisfaction Index (ECSI), where the centrality of the customer is developed in order to take into account the prosumership as a fundamental part of service quality and satisfaction. The theoretical model has been formalized in 4hypotheses: (HP1) the PROSERV-Q questionnaire has a good level of reliability; (HP2) the PROSERV-Q underlies the three level abstraction modelled by PROSERV; the estimated level of overall satisfactionhas high correlation with the external global satisfaction index (HP3) and Loyalty (HP4).In order to test these hypotheses, the PROSERV -and the associated questionnaire PROSERV-Q –are applied to a sample of 680 customers of services. The theoretical model has been conceptualized as a three levels hierarchical structure, and statistically formalized with the PLS Path Modelling (PLS-PM) with higher-order constructs.Results are consistent with hypotheses, in that providing evidence that the three-level PROSERV model is able to capture the fundamental constitutive components of customer satisfactionand, at same time, affects the loyalty.

scholarly journals Hydroconversion of Waste Cooking Oil into Bio-Jet Fuel over NiMo/SBUY-MCM-41

Catalysts ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 466 ◽  
Author(s):  
Zongwei Zhang ◽  
Qingfa Wang ◽  
Xiangwen Zhang
Keyword(s):  
Hierarchical Structure ◽  
Active Sites ◽  
Hydrocarbon Fuel ◽  
Waste Cooking Oil ◽  
Jet Fuel ◽  
Cooking Oil ◽  
New Strategy ◽  
Cyclic Compounds ◽  
Alternative Jet Fuel ◽  
Mcm 41

A hierarchical SBUY-MCM-41 catalyst was prepared by sacrificing USY (a microporous molecular sieve) to synthesize the MCM-41 zeolite via a hydrothermal method. The hydroconversion of waste cooking oil into hydrocarbon fuel over a NiMo/SBUY-MCM-41 catalyst was investigated. The micropores of the Y building units were inherited by the SBUY-MCM-41 zeolite, in which a special hierarchical structure was formed and the accessibility of reactants to the micropore active sites was improved. The hierarchical SBUY-MCM-41 showed high acidity and hydrothermal stability. Compared with mesoporous Al-MCM-41 and microporous USY zeolites, the SBUY-MCM-41-supported NiMo catalyst significantly enhanced the selective cracking of waste cooking oil for the production of jet-fuel-range hydrocarbons (37.3%), with the highest selectivity for the formation of C10–C14 hydrocarbons and a satisfactory selectivity for the formation of jet-fuel-range aromatics (7.6%), as well as a few cyclic compounds. The improved selectivity is the result of the special hierarchical structure and acid distribution of SBUY-MCM-41. This work provides a new strategy to synthesize a hierarchical catalyst for producing alternative jet fuel from waste cooking oil and vegetable oils.

scholarly journals Diagnostic test for number concept development during early childhood

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Hanrie S. Bezuidenhout
Keyword(s):  
Theoretical Model ◽  
Diagnostic Test ◽  
Hierarchical Structure ◽  
Primary Schools ◽  
Rasch Analysis ◽  
Concept Development ◽  
Number Concept ◽  
The Hierarchical Structure ◽  
The Individual ◽  
Grade One

Background: This article presents the Afrikaans translation of an originally German diagnostic test for early number concept development. The process of ‘importing’ a test to South Africa by considering linguistic-, functional-, cultural and metric equivalence is outlined. A theoretical model describes five levels of young children’s hierarchical number concept development which collectively contribute to early mathematical understanding. The five-level hierarchical structure has previously been confirmed by testing the theoretical model in a one-dimensional Rasch analysis in Germany. Aim: The current study aimed to determine whether the individual items, allocated to test the concepts of each level of the Afrikaans translation of the diagnostic test, confirm the hierarchical structure of the theoretical model. Setting: A Rasch analysis indicated that the model was fit for the Afrikaans translation. A sample of 165 Afrikaans-speaking grade one children was tested in six Afrikaans medium primary schools in Gauteng. Methods: Analysis of fit values, person and item reliability and a person–item map was used as part of a Rasch analysis. Results: The theoretical model of hierarchical number concept development holds for the Afrikaans MARKO-D. Five levels were clearly distinguishable on a Write map and the individual items tested the concepts according to the levels of the theoretical model. Conclusion: The Afrikaans MARKO-D can now successfully be used to describe young Afrikaans children’s number concept development. A five-level theoretical model is a useful tool for teachers using the MARKO-D to assess young children’s numerical competence.

scholarly journals Self-efficacy beliefs of youth entering the labour market

2012 ◽  
Vol 18 (1-2) ◽  
pp. 193-214
Author(s):  
Paweł Kot ◽  
Bohdan Rożnowski
Keyword(s):  
Theoretical Model ◽  
Young People ◽  
Labour Market ◽  
Hierarchical Structure ◽  
Self Efficacy ◽  
Social Roles ◽  
Efficacy Beliefs ◽  
School To Work ◽  
Work Transition ◽  
Life Roles

Abstract This article presents the psychological meaning of school-to-work transition. Transition to taking up new social roles entails numerous difficulties, and that is why young people see it as a crisis point. According to researchers one of the predictors of effective transition to the labour market is self-efficacy. This article presents the two obtaining approaches to the psychology of self-efficacy beliefs. Both specific and generalized self-efficacy belief are good predictors of human behaviour, which has been repeatedly confirmed in the studies (main overview in this article). The authors of this compilation have integrated the two dominating approaches into one theoretical model, taking account of the three levels of generality proposed by Rosch. By doing that, a theoretical model has been created which allows for organising self-efficacy beliefs relating to life roles into a three-level hierarchical structure.

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