Output feedback stabilization of switching discrete-time linear systems with parameter uncertainties

This paper deals with observer-based control design for a class of switched discrete-time linear systems with parameter uncertainties. The main contribution of the paper is to propose a convenient way based on Finsler’s lemma to enhance the synthesis conditions, expressed in terms of Linear Matrix Inequalities (LMIs). Indeed, this judicious use of Finsler’s lemma provides additional decision variables, which render the LMIs less conservative and more general than all those existing in the literature for the same class of systems. Two numerical examples followed by a Monte Carlo evaluation are proposed to show the superiority of the proposed design technique.     

Agentive suspension of oppressive structures: self-concept and emotion-work among Muslim mothers who study at a Jewish university

This article aims to highlight the significance of self-concept and emotion-work in the everyday experiences of Muslim mothers who are students at a Jewish university. This research objective was achieved by means of in-depth interviews with mothers who are all studying to earn master’s degrees. Our study reveals three main findings. The first is an ‘inundated self’ that experiences frequent phenomenological preoccupation with the dialectic between structure and agency, as well as acute internal transitions between space-affiliated self-concepts, thus making it difficult to establish narrative coherence. The second is the agentive suspension of the structure. And last is the emotion-work (characterized by experiences of aloneness, which is dissimilar from loneliness) and management of emotional tension. The discussion section suggests pondering the unique interaction between structure and agency, especially the agentive strategies that enable creative inventions.     

Ameliorative Effects of <Emphasis Type="Italic">Allium sativum</Emphasis> Extract on iNOS Gene Expression and NO Production in Liver of Streptozotocin + Nicotinamide-Induced Diabetic Rats

Diabetes mellitus (DM) is one of the most prevalent diseases in the world, which is strongly associated with liver dysfunction. Hyperglycemia, through an oxidative stress pathway, damages various tissues. Herbal medicine is a good candidate to ameliorate hyperglycemia and oxidative stress. In this study, the effects of aqueous Allium sativum (garlic) extract (AGE) on gene expression of inducible nitric oxide synthases (iNOS) and production of nitric oxide (NO) were evaluated in the liver tissue of diabetic rats. Four groups of rats contained normal control rats, garlic control rats (AGE), Streptozotocin (STZ) + nicotinamide-induced diabetic rats (DM), and diabetic rats treated with garlic (DM + AGE). Glucose levels and liver enzymes activities were determined by colorimetric assay in the serum. Gene expression of iNOS by real-time PCR, NO levels by Griess method, oxidative stress parameters by spectrophotometric method and histopathological examination by hematoxylin and eosin staining method were evaluated in the liver tissues. Glucose levels, activities of liver enzymes, oxidative stress markers, iNOS gene expression, and NO production increased significantly in diabetic rats in comparison with control rats, whereas after oral administration of garlic, these parameters decreased significantly, close to the normal levels. Hence, the beneficial effects of garlic on the liver injury of diabetes could be included in the hypoglycaemic and antioxidant properties of garlic via a decrease in gene expression of iNOS and subsequent NO production.     

On the tips of their tongues: authors and their views on scholarly publishing

The paper presents the results of an international questionnaire survey of the attitudes of senior authors towards scholarly publishing. It was commissioned by the Publishers Association (PA) and the International Association of Scientific, Technical and Medical Publishers (STM). A total of 5,513 authors participated. The questionnaire included 22 closed questions and one open‐ended question that 1,943 authors used to freely express their views. Using QSR N6 textual analysis software, their comments were processed and themes extracted. The main concerns of the authors were the peer‐review process, faster publishing, better access to journals, journal prices, and issues related to electronic publishing.     

‘A fair go for all?’ Australia’s language-in-migration policy

As the power of tests lies in their uses, language tests that are used to assess immigration eligibility exercise enormous power. Critical Language Testing calls for exposing the power of tests by examining the intentions of introducing tests and their effects on individuals and society, especially from the perspective of test-takers. This case study investigates the rationale for and impact of a particular language-in-migration policy in Australia, drawing on the experiences and perceptions of two skilled migration applicants. One of them was successful and the other unsuccessful, essentially on the ground of their language test results. Insights from the study challenge prevalent discourses about language tests and social integration, employability, economic efficiency, and national security. The article makes some policy recommendations for making the use of language tests more beneficial for immigrants and immigrant-receiving societies in a globalised world that has witnessed unprecedented flows of immigrants.     

A global questionnaire survey of the scholarly communication attitudes and behaviours of early career researchers

This article describes an international study informed by a 3‐year‐long qualitative longitudinal project, which sought to discover the scholarly communication attitudes and behaviour of early career researchers (ECRs). Using a combination of small‐scale interviews and a larger‐scale survey, ECRs were questioned on their searching and reading behaviour, publishing practices, open data, and their use of social media. Questionnaire invitations were sent out via publisher lists, social media networks, university research networks, and specialist ECR membership organizations. One‐thousand and six‐hundred responses were received, with many coming from China, Russia, and Poland. Results showed that ECRs are adopting millennial‐facing tools/platforms, with Google, Google Scholar, social media, and smartphones becoming embedded in their scholarly activities. Open data sharing obtains widespread support but somewhat less practice. There are some differences in attitudes and behaviour according to age and subject specialism.     

New ways of building,showcasing, and measuring scholarly reputation

The article reports on a study of the views and actions of nearly a hundred scholars – mostly academic researchers from four European countries and four disciplines – in regard to scholarly reputation in the Science 2.0 age. It specifically looks at the role that 'emerging reputational mechanisms and platforms are playing in building, maintaining, and showcasing scholarly reputation in the digital age. Popular examples of such platforms are ResearchGate and Academia.edu . Data were obtained through one‐to‐one interviews and focus groups, supported by desk research. The main findings were: (a) it is early days and uptake is light and patchy with platforms largely used for non‐reputational purposes, such as sharing documents; (b) most users were passive and did not fully engage with the social aspects of the platforms; (c) the reputational focus was very much on just one scholarly activity (research), on just two outputs of that activity (publications and conferences) and one measurement of that activity (citations), but there are the stirrings of change; (d) young researchers are set to profit most from the emerging platforms.     

The effectiveness of the GeoGebra Programme in the development of academic achievement and survival of the learning impact of the mathematics among secondary stage students

Education and Information Technologies - The objective of this research is to identify the effectiveness of the GeoGebra program in developing academic achievement and ensuring survival of the...     

Interdisciplinarity and the information-seeking behavior of scientists

Adopting an intradisciplinary perspective, this article evaluates the information-seeking behavior of academics from different subfields of physics and astronomy. It investigates the effect of interdisciplinarity (reliance on the literature of other subjects) and the scatter of literature on two aspects of the information-seeking behavior: methods used for keeping up-to-date and for identifying articles. To this end a survey of 114 PhD students and staff at the Department of Physics and Astronomy at the University College London was carried out. The findings showed that the subfields that are more interdisciplinary or have a more scattered literature are more likely to use general search facilities for finding information. The study also showed that cross-disciplinary use of the literature is not necessarily an indicator of scattered literature. The study reveals intradisciplinary differences among physicists and astronomers in terms of their information-seeking behavior and highlights the risk of overlooking the characteristics of information-seeking behavior of specialized subject communities by focusing on very broad subject categories.     

A mediation meta-analysis of the role of maternal responsivity in the association between socioeconomic risk and children’s language

This meta-analysis tested maternal responsivity as a mediator of the association between socioeconomic risk and children's preschool language abilities. The search included studies up to 2017 and meta-analytic structural equation modeling, allowed us to examine the magnitude of the indirect effect across 17 studies (k = 19). The meta-analysis included 6433 predominantly White, English speaking children (M_age = 36 months; 50% female) from Western, industrialized countries. All paths in the model were statistically significant, notably, the indirect effect was significant (b = −.052), showing that maternal responsivity may be a proximal intervening variable between socioeconomic risk and children's language development. Moderator analyses found that the indirect effect was stronger for sensitive parenting than warmth and when parenting was assessed in the family home.