Fuzzy Membership Functions Tuning For Speed Controller Of Induction Motor Drive: Performance Improvement.

Fuzzy logic controller (FLC) has gained high interest in the field of speed control of machine drives in both academic and industrial communities. This is due to the features of FLC of handling non-linearity and variations. FLC system consists of three main elements: scaling factors (SFs), membership functions (MFs), and rule-base. Fuzzy MFs can be designed with different types and sizes. For induction motor (IM) speed control, (3x3), (5x5) and (7x7) MFs are the most used MFs sizes, and normally designed based on symmetrical distribution. However, changing the width and peak position of MFs design enhance the performance. In this paper, tuning of MFs of FLC speed control of IM drives is considered. Considering (3x3), (5x5) and (7x7) MFs sizes, the widths and peak positions of these MFs are asymmetrically distributed to improve the performance of IM drive. Based on these MFs sizes, the widths and peak positions are moved toward the origin (zero), negative and positive side that produces a controller less sensitive to the small error variations. Based on simulation and performance evaluations, improvement of 5% in settling time (Ts), 0.5% in rise time and 20% of steady-state improvement achieved with the tuned MFs compared to original MFs

Investing in Community-Based Education to Improve the Quality, Quantity and Retention of Physicians in Three African Countries

Please help populate SUNScholar with the full text of SU research output. Also - should you need this item urgently, please send us the details and we will try to get hold of the full text as quick possible. E-mail to [email protected]. Thank you.Geneeskunde en GesondheidswetenskappeSentrum vir Gesondheidsberoepe Onderwy

Internal Facilitation by Health Assistants for the “WHO Lay Health Worker Dementia Care” in Rural Uganda: A Formative Evaluation

Edith K Wakida,1,2 Celestino Obua,2 Godfrey Zari Rukundo,3 Mary Samantha,2 Samuel Maling,4 Christine K Karungi,2 Zohray M Talib,1 Jessica Haberer,5,6 Stephen J Bartels5,6 1Department of Medical Education, California University of Science and Medicine, Colton, California, USA; 2Department of Research and Development, Alpha Center for Research Administration, Mbarara, Uganda; 3Department of Psychiatry and Behavioral Neurosciences, McMaster University, Hamilton, Ontario, Canada; 4Department of Psychiatry, Mbarara University of Science and Technology, Mbarara, Uganda; 5Department of Internal Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA; 6Harvard Medical School, Harvard University, Boston, Massachusetts, USACorrespondence: Edith K Wakida, Email [email protected]: Dementia is characterized by cognitive symptoms like memory loss, difficulty with language, and impaired judgment, alongside behavioral and psychological symptoms such as depression, anxiety, and aggression. Early diagnosis and tailored care are essential for managing these symptoms, improving quality of life, and reducing caregiver burden. Dementia affects a substantial portion of older people globally, especially in low- and middle-income countries like Uganda, where rural healthcare systems face challenges in dementia care access. To address these needs, we gathered key stakeholders’ perspectives on a culturally tailored model employing lay health workers, supported by health assistants as internal facilitators, to implement the World Health Organization dementia toolkit in rural communities.Methods: We conducted a formative qualitative study, utilizing one-on-one interviews with health assistants, district health team members, and primary healthcare providers in rural Uganda. We solicited their perspectives on implementing the World Health Organization dementia toolkit at the village level. The integrated Promoting Action on Research Implementation in Health Services (i-PARIHS) framework guided data collection and analysis, focusing on implementation support, process improvement, and practice sustainment.Results: Strong support was found for health assistants’ roles in facilitating lay health worker-led dementia care at the community level. Health assistants’ familiarity with lay health workers and pre-established structures were considered facilitating factors. Key challenges included knowledge gaps in dementia care and limited resources. Participants emphasized the importance of training, mentorship, and standardized reporting tools to enhance the implementation of dementia care. They recommended providing the health assistants with job guides, updated reporting templates to collect dementia indicators, and orientation on what they should do during internal facilitation with the lay health workers using the dementia toolkit.Conclusion: Health assistants’ internal facilitation provides a promising strategy for scaling dementia care in rural Uganda by leveraging community-based lay health workers. Addressing identified knowledge gaps, communication needs, and resource constraints will be essential to sustaining dementia care interventions in these communities.Keywords: dementia care, internal facilitation, lay health workers, Uganda, rural health, i-PARIHS framewor

Fuzzy membership functions tuning for speed controller of induction motor drive: performance improvement

&lt;p&gt;Fuzzy &lt;span&gt;logic controller (FLC) has gained high interest in the field of speed control of machine drives in both academic and industrial communities. This is due to the features of FLC of handling non-linearity and variations. FLC system consists of three main elements: scaling factors (SFs), membership functions (MFs), and rule-base. Fuzzy MFs can be designed with different types and sizes. For induction motor (IM) speed control, (3x3), (5x5) and (7x7) MFs are the most used MFs sizes, and normally designed based on symmetrical distribution. However, changing the width and peak position of MFs design enhance the performance. In this paper, tuning of MFs of FLC speed control of IM drives is considered. Considering (3x3), (5x5) and (7x7) MFs sizes, the widths and peak positions of these MFs are asymmetrically distributed to improve the performance of IM drive. Based on these MFs sizes, the widths and peak positions are moved toward the origin (zero), negative and positive side that produces a controller less sensitive to the small error variations. Based on simulation and performance evaluations, improvement of 5% in settling time (Ts), 0.5% in rise time and 20% of steady-state improvement achieved with the tuned MFs compared to original &lt;/span&gt;MFs.&lt;/p&gt;</jats:p