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Sökning: WAKA:kon > Högskolan i Borås

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  • Abbaszad Rafi, Abdolrahim, et al. (författare)
  • Photo-Switchable Nanomechanical Systems Comprising a Nanocontainer (Montmorillonite) and Light-Driven Molecular Jack (Azobenzene-Imidazolium Ionic Liquids) as Drug Delivery Systems; Synthesis, Characterization, and in Vitro Release Studies
  • 2018
  • Ingår i: ACS Biomaterials Science & Engineering. - : American Chemical Society. - 2373-9878. ; 4:1, s. 184-192
  • Tidskriftsartikel (refereegranskat)abstract
    • In this work, photoresponsive nanomechanical systems were prepared through the intercalation of positively charged photoswitching molecular jacks (azobenzene ionic liquids, Azo-ILs) within montmorillonite (MMT) layers (MMT@Azo-ILs). The study shows that MMT@Azo-ILs are photosensitive and the synthesized molecular jacks could change the basal distances of MMT layers upon UV irradiation. These changes come from changes in the structure and geometry of Azo molecules (i.e., cis-trans isomerization) between clay layers upon UV irradiation. The prepared photoresponsive nanomechanical systems were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray powder diffraction (XRD), thermogravimetric analysis (TGA), energy-dispersive X-ray spectroscopy (EDX), field-emission scanning electron microscope (FE-SEM). Moreover, the in vitro release studies were performed in different conditions (upon UV irradiation and darkness) in pH 5.8 at 34 ± 1 °C, and it was found that the release rates from drug loaded MMT@Azo-ILs were higher upon UV irradiation in comparison with the release rates in darkness. According to the release studies, the prepared photoresponsive carriers might be considered as an excellent potential candidate in order to formulate smart sunscreens. © 2017 American Chemical Society.
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  • Aboelwafa, Mariam M. N., et al. (författare)
  • A Machine-Learning-Based Technique for False Data Injection Attacks Detection in Industrial IoT
  • 2020
  • Ingår i: IEEE Internet of Things Journal. - Piscataway : Institute of Electrical and Electronics Engineers (IEEE). - 2327-4662. ; 7:9, s. 8462-8471
  • Tidskriftsartikel (refereegranskat)abstract
    • The accelerated move toward the adoption of the Industrial Internet-of-Things (IIoT) paradigm has resulted in numerous shortcomings as far as security is concerned. One of the IIoT affecting critical security threats is what is termed as the false data injection (FDI) attack. The FDI attacks aim to mislead the industrial platforms by falsifying their sensor measurements. FDI attacks have successfully overcome the classical threat detection approaches. In this article, we present a novel method of FDI attack detection using autoencoders (AEs). We exploit the sensor data correlation in time and space, which in turn can help identify the falsified data. Moreover, the falsified data are cleaned using the denoising AEs (DAEs). Performance evaluation proves the success of our technique in detecting FDI attacks. It also significantly outperforms a support vector machine (SVM)-based approach used for the same purpose. The DAE data cleaning algorithm is also shown to be very effective in recovering clean data from corrupted (attacked) data. © 2014 IEEE.
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  • Abraham, Getahun Yacob, 1958- (författare)
  • A post-colonial perspective on African education systems
  • 2020
  • Ingår i: African Journal of Education and Practice. - : International Peer Reviewed Journals and Books (IPRJB). - 2519-0296. ; 6:5, s. 40-54
  • Tidskriftsartikel (refereegranskat)abstract
    • Purpose: The purpose of this article is to discuss about precolonial and colonial education and the development of the education systems in the postcolonial Africa. The paper will deal with the questions whether there were any education systems in precolonial Africa and motives for introducing the colonial education systems. Further the relation of the colonial education systems with the needs of the local society, the postcolonial education systems and their future will be analysed. Methodology: Postcolonial perspective is a theoretical frame for the study. A desk-research was conducted to identify and select the relevant literature. Content analysis was used as a method to understand, analyse and interpret the literature. Findings: The results of the literature review show that there were socialization mechanisms before colonialism in African societies. Education introduced in its modern form by missionaries was supposed to serve mainly religious purposes and to train low level functionaries by colonial states. Instead of focusing on local realities education was used to teach the glories of the colonial countries, spread their language and culture as well as introduce a new way of life by condemning all that was native. After independence the inherited colonial education systems continued isolating the masses who had no access to the colonial languages. Unique contribution to theory, practice and policy: Findings of this study shows some limitations in African education systems. It is necessary that education policy makers and other concerned stakeholders´ to increase the use of local languages to reach the society at large, to focus on contents relevant to their contexts, to provide both theoretical and skill-based education useful for development of society and to aim towards educating productive, conscious, critical and democratic citizens.
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