Browsing by Author "ALI RAZA"

Now showing 1 - 4 of 4
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    Growth and characterization of multilayer NiO/Agand NiO/Al structures for energy saving heat mirrors
    (UMT, Lahore, 2020) ALI RAZA
    Optically Transparent multilayer NiO/Ag and NiO/Al heat mirrors were prepared which allow the visible radiation to pass through it and reflect the Infrared radiations. NiO thin film was deposited by sol-gel spin coating technique, while Ag and Al thin films were prepared by thermal evaporation. XRD analysis showed that the formation of the cubic structure of NiO. The chemical analysis reveals that the Ni2O3 phase also presents along with the NiO phase. The transmittance spectra of NiO/Ag and NiO/Al coatings showed good transmittance in the visible region while highly reflective in the infrared region.
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    ROLE OF FACEBOOK ALGORITMIC CURATION & GENERATIVE AI IN POLITICAL POLARIZATION
    (UMT.Lahore, 2024) ALI RAZA
    This research paper investigates the impact of AI Algorithmic curation and filter bubbles on the spread of misinformation and political polarization in Pakistan. It also highlights the recommendation system of Facebook and its role in exposing users to content based on selective exposure. The role of AI and recommendation algorithm curation in spreading misinformation, and deepening polarized political views have raised concerns. The Social Media Algorithmic Curation crafts a system based on personalization that improves user experience on the platform and maximizes engagement. However, this technique is also deepening polarization in society by reinforcing pre-existing beliefs and limiting dissenting viewpoints.
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    Scaffolding c++ on smart phone for novice learners of programming
    (UMT.Lahore, 2016) ALI RAZA
    Learning programming has been a tedious and challenging task for the novice programmers of high school and university level. If timely guidance is not provided to the learners then dropout from programming courses is increased and overall low score by students is achieved. If Scaffolding (support) is being provided to students then results can be optimistic for the novice learners of programming that can not only provide them guidance but will also increase their learning ability with constructive interest. Scaffolding is guidance, the support provided to learners in the form of tools, curriculum, pedagogy, advice or any tutorial to accomplish a task which learner would not have been able to do without any support. As the learner make the transition from naïve to expert, the guidance provided to learner starts to fade off. The use of Smart phones in Pakistan is on the rise, especially in the young generation of the country. This thing motivates us to build a programming environment in C++ for novice learners of computer programming. In order to design this application, a comprehensive scaffolding framework has been proposed which helps novices for learning computer programming on handheld devices. To provide proof of concept, a programming environment for novice learners outside the classroom/lab is provided, which is built on the scaffolding principles. Most of the Pakistani universities use C++ as a first programming language in their fundamental computer programming course. We implemented the proof of concept in the form of a programming environment on Smart phones that provides scaffolding (Support) to learners. This application is specifically created for the android platform because of the low cost of an android phone and large audience of this platform. Two experiments have been conducted in order to understand the effectiveness of the construction of programs on Smart phones in C++. Participants from both universities UOS and UOL participated in the experimentation. Our designed first draft of the application named “Scaffoldy” was compared with a non-scaffolded system taken from Google Play store. A study was evaluated using different parameters such as task success, efficiency, a time required for the task, number of errors and learnability. Learners were provided scaffolding in the “Scaffoldy” in the form of static and automatic scaffolding. Learners showed a great response to the support provided to them in both the forms. Specifically programming with parts, default statements and hints were highly appraised by the participants in the experiment. Learners found practising with errors feature highly effective as they were able to learn about new errors. Their error finding skill enhanced greatly as they practised error finding feature. “Scaffoldy” showed better results in term of attempted and completed tasks as compared to a non-scaffolded system. Learners showed fruitful results specifically in terms of efficiency, task success and learning from their errors. The feedback from learner suggested that working with the “Scaffoldy” was helpful for them and learners adopted to scaffolding techniques again, when scaffolding provided to them was faded away.
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    Study of optical properties of quartz and fabrication of polarizing element
    (UMT, Lahore, 2022) ALI RAZA
    Quartz crystal, which is used in the making of polarizing elements, is found naturally in Pakistan in abundant quantity at a cheaper cost. However, in Pakistan, we have been unable to use this crystal of magnificent optical properties in the optics industry as a phase-changing element such as a retarder. In this research work, firstly the optical properties and structure of quartz are discussed. Later, some samples of quartz have been processed to observe that the unpolarized light gets polarized when it passes from the quartz crystal in a specific direction. This change of polarization states happens due to helical structure of quartz crystal.