No abstract

The study of women’s management and leadership in education has become a central research topic and the copious work published in many countries encompasses various issues relating to gender and educational leadership. The study of female school principals from the Arab minority in Israel has only recently begun. This is a minority that lives mostly in separate settlements, distinguished from the majority Jewish population by their lifestyle and culture, in a society that can be described as developing. In-depth interviews were conducted with the seven female school principals, from different socio-cultural backgrounds, who had successfully climbed the professional ladder to senior positions in the Arab education system in Israel. Data-analysis addressed three areas: biographical background; the social and political aspects of the women’s nomination to principalship; and the social and professional acceptance of the women as principals. Findings indicated that women principals contribute significantly to the development of Arab schools. As women in senior roles, the majority faces resistance; a change of societal norms and willingness to accept women’s leadership would enable many more women to fill public roles and to contribute to their society’s progress.

Following our previous results, which provide evidence for the emergence of a chiral p-wave tripletpairing component in superconducting Nb upon the adsorption of chiral molecules, we turned to investigate whether such an effect can take place in a proximal superconductor consisting of metal on superconductor bilayer. Note that in such proximity systems, correlated electron-hole (Andreev) pairs exist in the normal metal rather than genuine Cooper pairs. To that end, we used scanning tunneling spectroscopy (STS) on thin Au films grown in-situ on NbN (a conventional s-wave superconductor) before and after adsorbing helical chiral, alpha-helix polyalanine molecules. The tunneling spectra measured on the pristine Au surface showed conventional (s-wave like) proximity gaps. However, upon molecules adsorption the spectra significantly changed, all exhibiting a zero-bias conductance peak embedded inside a gap, indicating unconventional superconductivity. The peak reduced with magnetic field but did not split, consistent with equal-spin triplet-pairing p-wave symmetry. In contrast, adsorption of non-helical chiral cysteine molecules did not yield any apparent change in the order parameter, and the tunneling spectra exhibited only gaps free of in-gap structure.

Restriction of glutamine synthetase to the nervous system is mainly achieved through the mutual function of the glucocorticoid receptor and the neural restrictive silencing factor, NRSF/ REST. Glucocorticoids induce glutamine synthetase expression in neural tissues while NRSF/REST represses the hormonal response in non-neural cells. NRSF/REST is a modular protein that contains two independent repression domains, at the N and C termini of the molecule, and is dominantly expressed in nonneural cells. Neural tissues express however splice variants, REST4/5, which contain the repression domain at the N, but not at the C terminus of the molecule. Here we show that full-length NRSF/REST or its C-terminal domain can inhibit almost completely the induction of gene transcription by glucocorticoids. By contrast, the N-terminal domain not only fails to repress the hormonal response but rather stimulates it markedly. The inductive activity of the N-terminal domain is mediated by hBrm, which is recruited to the promoter only in the concomitant presence of GR. Importantly, a similar inductive activity is also exerted by the splice variant REST4. These findings raise the possibility that NRSF/REST exhibits a dual role in regulation of glutamine synthetase. It represses gene induction in nonneural cells and enhances the hormonal response, via its splice variant, in the nervous system.