1,146 research outputs found
Trichloroethylene catalytic conversion over acidic solid catalysts
No full textThe conversion of trichloroethylene (TCE) vapor (1000 cm3/m3) in humid and dry conditions has been comparatively tested over several
acidic catalists: HY zeolite, silica–alumina, tungsta–alumina, and pure -alumina. Among them, alumina shows the higher activity in TCE decomposition
to COx and HCl at lower temperature (total conversion around 820 K) and no deactivation phenomena occur at the laboratory scale
time. AddingWO3 could even enhance catalytic activity. The use of alumina catalysts, although much less active than noble-metal containing
catalysts, allows, in principle, the destruction of different chlorided organics and the recovery of HCl in a versatile authotermic process
Elderly labor supply, endogenous grandparental childcare, and fertility in an OLG model
No full textThis paper explores how grandparental childcare influences fertility decisions, elderly labor supply, and economic development. We model the time elderly individuals allocate between work and caring for grandchildren. In high-income countries, higher wages lead to increased investments in children’s education and human capital. Interestingly, the decision to work in old age does not depend on economic development but on wage dynamics. Specifically, when the effective wage grows rapidly, grandparents are more likely
to work, even while caring for grandchildren. These findings highlight the importance of intergenerational time transfers in shaping economic outcomes. Future research could explore the long-term effects of aging populations on labor markets and family dynamics
Educational support by grandparents and human capital growth: an OLG model with endogenous time allocation
No full textThis study explores the role of grandparents in the education of their grandchildren within an overlapping generations model. We introduce an endogenously determined time allocation, where grandparents decide how much time to dedicate to their grandchildren's education based on a trade-off between leisure and educational contributions. The model shows that grandparental involvement in education
influences the intergenerational transmission of human capital, with the potential for long-term effects on economic outcomes. By combining theoretical analysis and simulations, we highlight the dynamic relationship between grandparental education, human capital development, and the generational transmission process
The k-logistic growth model. Qualitative and quantitative dynamics
No full textThe κ-exponential function, representing a generalization of the exponential function, has been
firstly introduced in physics, and, then, it has been considered in a noteworthy number of
fields because of its ability to take rare events into account. Among the possible applications
of this function, one of particular interest is in economics in which rare events may consist
in natural disasters, such as earthquakes that reduce the supply of capital, or epidemics or
other external shocks influencing the supply of intermediate inputs, human or physical capital.
Starting from the κ-exponential function, the κ-logistic function, which is a generalization of
the sigmoidal function, can be obtained and used to describe production functions in a unique
setting to take into account (1) several shapes usually considered in economics (i.e. concave and
non-concave production functions), (2) economies at different development levels, and, (3) the
possible occurrence of rare events. In this paper, we investigate the economic growth model as
proposed by Böhm and Kaas (2000), wherein the production function utilizes the κ-logistic
function. We provide theoretical results confirmed by extensive computational experiments
and in line with economic literature showing that a poverty trap may emerge together with
fluctuations, multistability and complex dynamics
Correction to: Size‐Dependent Enforcement, Tax Evasion and Dimensional Trap
No full textThe article “Size‐Dependent Enforcement, Tax Evasion and Dimensional Trap”, written by Raffaella Coppier, Elisabetta Michetti and Luisa Scaccia, was originally published electronically on the publisher’s internet portal on 05 July 2023 without open access. With the author(s)’ decision to opt for Open Choice the copyright of the article changed on 24 February 2024 to © The Author(s) 2024 and the article is forthwith distributed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made
Decomposition of hexamethylcyclotrisiloxane over solid oxides
No full textThe decomposition of hexamethylcyclotrisiloxane (HMCTS) has been studied at room temperature and in
the range 473–673 K over the surface of basic (CaO, MgO) and acidic oxides (Al2O3, SiO2). Alumina allows
the complete removal of HMCTS from synthetic biogases at 673 K. A reactive adsorption occurs with surface
silication and release of methane. The adsorption capacity of our alumina adsorbent (180 m2 g1),
until saturation, at 673 K, is 0.31 g (HMCTS) g(Al2O3)
1, which corresponds to one silicon atom per 9 Å2, i.e.
the silication monolayer capacity.
On the contrary, silica, which is an excellent adsorbent for siloxanes at room temperature, looses its
adsorption ability at high temperature as it is typical of a molecular adsorption behavior. Basic oxides
such as MgO and CaO have strong reactivity in decomposing siloxanes in the absence of CO2, but loose
reactivity when in contact with carbon dioxide because of surface carbonation
Brevi note a margine di alcune recenti edizioni del De consolatione di Cardano
No full textReview article of:
Girolamo Cardano, De consolatione, a cura di Marialuisa Baldi, revisione filologica a cura di Elisabetta Tonello, Leo S. Olschki, Firenze 2019 (Hyperchen. Testi e Studi per la Storia della Cultura del Rinascimento, 6), pp. vi + 284, ISBN: 9788822266231.
Girolamo Cardano, Sulla consolazione, a cura di Marialuisa Baldi, Leo S. Olschki, Firenze 2021 (Hyperchen. Testi e Studi per la Storia della Cultura del Rinascimento, 7), pp. xvi + 194, ISBN: 9788822267450.Analisi di:
Girolamo Cardano, De consolatione, a cura di Marialuisa Baldi, revisione filologica a cura di Elisabetta Tonello, Leo S. Olschki, Firenze 2019 (Hyperchen. Testi e Studi per la Storia della Cultura del Rinascimento, 6), pp. vi + 284, ISBN: 9788822266231.
Girolamo Cardano, Sulla consolazione, a cura di Marialuisa Baldi, Leo S. Olschki, Firenze 2021 (Hyperchen. Testi e Studi per la Storia della Cultura del Rinascimento, 7), pp. xvi + 194, ISBN: 9788822267450.Review article of:
Girolamo Cardano, De consolatione, a cura di Marialuisa Baldi, revisione filologica a cura di Elisabetta Tonello, Leo S. Olschki, Firenze 2019 (Hyperchen. Testi e Studi per la Storia della Cultura del Rinascimento, 6), pp. vi + 284, ISBN: 9788822266231.
Girolamo Cardano, Sulla consolazione, a cura di Marialuisa Baldi, Leo S. Olschki, Firenze 2021 (Hyperchen. Testi e Studi per la Storia della Cultura del Rinascimento, 7), pp. xvi + 194, ISBN: 9788822267450
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