Obestatin is a recently discovered 23 amino acids peptide derived from the ghrelin gene. As opposed to ghrelin, obestatin was shown to inhibit food intake in mice. The aims of this research were to ...study the effects of acute obestatin treatment on feeding behavior in the rat and its effects on GH and corticosterone secretion. Our results demonstrate that in young-adult male rats, obestatin effectively blunts the hunger caused by short-term starvation. Obestatin did not modify GH secretion in 10-day-old rats and did not antagonize the GH-releasing effects of hexarelin. Moreover, obestatin administration had no effects on spontaneous corticosterone secretion. In conclusion, these data demonstrate that in young-adult male rats the newly discovered obestatin can inhibit feeding but does not modify GH and corticosterone release in infant rats.
Four years of TJHE at a glance Donà dalle Rose, Luigi F.; Serbati, Anna
Tuning Journal for Higher Education,
11/2019, Volume:
7, Issue:
1
Journal Article
Peer reviewed
Open access
As an answer to a kind invitation from the present Editor Prof Mary Gobbi, we dare to share as past TJHE Editors some reflections about our four-year period, which edited 8 issues out of a total of ...12 issues since when the Journal was born (2013).Published online: 29 November 2019
The title of the present Issue is Academics, programmes, and methodologies for fostering students’ competences. The focus is again “fostering students’ competences”, but – given the complexity of ...higher education systems – “fostering” may best occur if the several involved actors are accordingly prepared and if the many intermediate steps are properly taken care of. In other terms, as we all know, the winds of innovation may follow quite different paths for new implementations and actual improvements, according to local situations, country- and time- priorities and according to the good will of actors. Indeed, the present Issue starts with the assessment made among some U.S. history academics on the impact of the paradigm shift in teaching and learning brought about by the Tuning and other projects. Next, a quite comprehensive overview of the innovative changes occurring in the field Engineering Education in China in recent years is presented (a most important step at discipline and programme level). The following article deals with the challenge of measuring with a compact operational tool the quality of a degree programme and at the same time the quality of its component units (an innovative step for programme planners and evaluators, carried out in Japan). Then, an experience aimed at re-designing a fourth year of the Bachelor of Education in a South African university on the basis of a constructive alignment methodology is described (again a step at programme planners level). The conclusive article in this issue is quite different from the others and deals with the possible global role to be played by universities as institutions for research, education and any other third mission, in our quickly changing world. We hope that the fundamentals extensively described in this paper may start a fruitful debate among readers and potential future authors.Published online: 29 November 2018
Nowadays, there is a growing awareness that higher education is called to help young people to develop their personal and professional future. The university mission is not only to increase ...opportunities for employability and for better matching of labour market requests and graduates’ skills, but also to prepare people to positively live in local and global communities as well as to actively contribute to personal and community well-being. Therefore, a more holistic approach to education is required, which overcomes the traditional idea of promoting logical, cognitive and linguistic intelligence and which promotes multiple intelligences, including emotional, interpersonal, creative skills. Scholarship of teaching and learning in higher education and educational research have shown that there is a variety of strategies and methods that can foster not only the development of knowledge, but also soft skills. This Issue offers some perspectives and innovative experiences in different subject areas within this framework and moves towards more general visions of educational issues.Published online: 31 May 2018
In thisIssuewe present firstly the answers given so far by Latin America to the challenge of Quality Assurance, with an eye to the perspective involved in a possible forthcoming transition toa ...secondgeneration of QA programs. We then present a “sub-regional” spinoff effect of the AHELO project, involving higher education institutions of Japan and Indonesia, willing to test, with an appropriate tool, the achieved learning outcomes of their students of mechanical engineering (master level). Finally, we present three articles from three African countries – Morocco, Ethiopia, and Tanzania – which deal with different facets of the complex challenge of the relationship between higher education and job market, here inflected in terms of job access, graduates’ wages, employability and actual employment after a competence-based learning path. The last article in thisIssue,focused on a specific aspect of the above landscape of answers to major challenges, investigates the relationship between algebraic competences with emotional intelligence.Published online: 30 November 2017
Editing the Journal during transition Donà dalle Rose, Luigi F.; Serbati, Anna
Tuning Journal for Higher Education,
11/2023, Volume:
11, Issue:
1
Journal Article
Peer reviewed
Open access
Both authors express their gratefulness to the whole Tuning Academy and to the many colleagues who cooperated to their editorial experience. Moreover, revisiting that period, they present some new ...remarks and reflection on that “incredible 5-years journey”. Anna’s contribution focusses on three big added values, that – according to her editorial experience – TJHE offered (and offers) to the higher education community worldwide. Indeed, TJHE offers – in the first place – a platform of individual and collective reflection on the themes emerging in the international scenario; in the second place, it offers an inclusive international approach, the variety of countries represented by authors being very large; finally, it offers a reference database, since it collects a variety of scholarly experience, from more structured projects and reforms to local teaching innovation and scholarship of teaching and learning. In Lupo’s contribution, the focus is “a meditation on competences”, those which are the heart of the Tuning community. The contribution starts from a description of the different competences and roles, which occur in a well-structured editorial process (whose achievement was the aim of those 5 years). Such an example – in its particular context – shows the complementarity and the circularity of competences, qualities which are present even in more general contexts of human life. Moreover, this example leads to a deeper understanding of the splendour and magnificence, that the competences may generate.
We prove that a large class of finite rank perturbations of diagonal operators and, in general, of diagonalizable normal operators of multiplicity one acting boundedly on a separable, infinite ...dimensional complex Hilbert space are decomposable operators in the sense of Colojoară and Foiaş 1. Consequently, every operator T in such a class has a rich spectral structure and plenty of non-trivial closed hyperinvariant subspaces which extends, in particular, previous theorems of Foiaş, Jung, Ko and Pearcy 5–7, Fang and J. Xia 3 and the authors 8,9 on an open question posed by Pearcy in the seventies.
We address the existence of non-trivial closed invariant ideals for positive operators defined on Banach lattices whose order is induced by an unconditional basis. In particular, for band-diagonal ...positive operators such existence is characterized whenever their matrix representations meet a positiveness criteria. For more general classes of positive operators, sufficient conditions are derived proving, particularly, the sharpness of such results from the standpoint of view of the matrix representations. The whole approach is based on studying the behavior of the dynamics of infinite matrices and the localization of the non-zero entries. Finally, we generalize a theorem of Grivaux regarding the existence of non-trivial closed invariant subspaces for positive tridiagonal operators to a more general class of band-diagonal operators showing, in particular, that a large subclass of them have non-trivial closed invariant subspaces but lack non-trivial closed invariant ideals.
We study the existence of reducing subspaces for rank-one perturbations of diagonal operators and, in general, of normal operators of uniform multiplicity one. As we will show, the spectral picture ...will play a significant role in order to prove the existence of reducing subspaces for rank-one perturbations of diagonal operators whenever they are not normal. In this regard, the most extreme case is provided when the spectrum of the rank-one perturbation of a diagonal operator $T=D + u\otimes v$ (uniquely determined by such expression) is contained in a line, since in such a case $T$ has a reducing subspace if and only if $T$ is normal. Nevertheless, we will show that it is possible to exhibit non-normal operators $T=D + u\otimes v$ with spectrum contained in a circle either having or lacking non-trivial reducing subspaces. Moreover, as far as the spectrum of $T$ is contained in any compact subset of the complex plane, we provide a characterization of the reducing subspaces $M$ of $T$ such that the restriction $T\mid _M$ is normal. In particular, such characterization allows us to exhibit rank-one perturbations of completely normal diagonal operators (in the sense of Wermer) lacking reducing subspaces. Furthermore, it determines completely the decomposition of the underlying Hilbert space in an orthogonal sum of reducing subspaces in the context of a classical theorem due to Behncke on essentially normal operators.
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