56 research outputs found
State of charge control based improved hybrid energy storage system for DC microgrid
No full textThis paper proposes a non-communication power management plan for a renewable solar-photovoltaic (PV) hybrid direct current (DC) microgrid consisting of batteries and supercapacitors (SCs). An effective control strategy for bidirectional converters has been proposed for power supply and load generation at different operating modes and state of charge (SOC) limits of the hybrid energy storage system (HESS). The battery and SC combination provides power to the load during normal or peak operating hours. The proposed hybrid power management system was tested under uneven load and generation using MATLAB. The proposed control enhanced the operation of microgrids by utilizing HESS with a novel control strategy based on the SOC. Seamless mode switches among different operating modes are also presented in this paper. This approach ensures stable current control, minimizes charging-discharging mode changes, mitigates the risk of overcharging and over-discharging batteries, extends battery service life, and balances the SOC across different energy storage units. Consequently, this strategy enhances the operational stability and economic efficiency of the DC microgrid. The proposed methodology provided better power allocation and improved the life of the battery
Electronic structures and optical characteristics of fluorescent pyrazinoquinoxaline assemblies and Au interfaces
No full text© 2021, The Author(s).Understanding the excitonic processes at the interfaces of fluorescent π-conjugated molecules and metal electrodes is important for both fundamental studies and emerging applications. Adsorption configurations of molecules on metal surfaces significantly affect the physical characteristics of junctions as well as molecules. Here, the electronic structures and optical properties of molecular assemblies/Au interfaces were investigated using scanning probe and photoluminescence microscopy techniques. Scanning tunneling microscopy images and tunneling conductance spectra suggested that the self-assembled molecules were physisorbed on the Au surface. Visible-range photoluminescence studies showed that Au thin films modified the emission spectra and reduced the lifetime of excitons. Surface potential maps, obtained by Kelvin probe force microscopy, could visualize electron transfer from the molecules to Au under illumination, which could explain the decreased lifetime of excitons at the molecule/Au interface.11Nsciescopu
Recursive differentiation method to study the nature of carbon nanobeams: A numerical approach
No full textOptimisation of a three-dimensional (3D) cell culture model for use in a miniature satellite system
No full textFollowing the return of astronaut Scott Kelly after a year in space comparisons with his twin showed large pathological changes in many organs, it is still not clear why this occurs; this is a growing concern with sending astronauts to Mars and on longer space flights.
Understanding the morphology of cells using cell-culture and the physiological and pathophysiological changes that a cell undergoes when subjected to stress, like when exposed to radiation or in reduced gravity, is beneficial to human health and can be applied to many conditions including osteoporosis, muscle atrophy and organ
damage (Biolo et al., 2003; Honda et al., 2014).
There are still many limitations with traditional two-dimensional monolayer culture, including distortion of shape due to growth area restraints. This has led to the introduction of 3D cell-culturing; the resulting cultures more closely mimic the pattern of cell growth in vivo (Antoni et al., 2015). This enables a far more accurate representation of the morphology of these cells and their interactions with their microenvironment, providing invaluable information for development of treatments and progression of healthcare. 3D culture allows for experiments which generate data that would otherwise require an animal model which is costly and time consuming (Pampoloni, Reynaud and Stelzer, 2007).
The aim of this study was to optimise a 3D cell culture model that can be used to grow mammalian cells on the BAMMSat that is currently being developed by Professor David Cullen at Cranfield University
Exploitation of Cache Based Side-Channels on ARM: Correlation Analysis of Access-driven Cache Attacks on Android Smartphones
No full textAndroid smartphones collect and compile a huge amount of sensitive information which is secured using cryptography. There is an unintended leakage of information during the physical implementation of a cryptosystem on a device. Such a leakage is often termed as side channel and is used to break the implementation of cryptographic algorithms. In this work, we utilize cache memory based side channels on android smartphones to retrieve crypto-process information. These side channels are based on the information leakage through the operating system, micro-architecture of the processor and the state of the processor's memory cache. We demonstrate the retrieval of data dependent memory access patterns using a spy application running in the background to recover the full secret key of cryptographic primitives such as AES T-table implementation in OpenSSL, all that would be necessary is a rogue app downloaded from an app store that is run under normal privileges.We show that a mathematical correlation which depends on the guessed key and can be utilized to recover the \emph{complete} key in access-driven cache attacks (CAs). We show the effectiveness of the proposed method using access time measured in noisy environments. We analyze the changes in the correlation values with the number of plaintexts/ciphertexts for a successful attack using key estimation. Furthermore, we discuss and demonstrate the applicability of cache memory based side channel attacks on a white-box implementation of AES
Detection of cadmium ion in water using films of nanocomposite of functionalized carbon nanotubes and anionic polymer
No full textHealth and wellbeing of staff working at higher education institutions globally during the post-COVID-19 pandemic period : evidence from a cross-sectional study
No full textBackground: The ongoing global crisis of Higher Education (HE) institutions during the post-COVID-19 pandemic period has increased the likelihood of enduring psychological stressors for staff. This study aimed to identify factors associated with job insecurity, burnout, psychological distress and coping amongst staff working at HE institutions globally. Methods: An anonymous cross-sectional study was conducted in 2023 with staff at HE institutions across 16 countries. Job insecurity was measured using the Job Insecurity Scale (JIS), burnout using the Perceived Burnout measure question, psychological distress using the Kessler Psychological Distress Scale (K10), and coping using the Brief Resilient Coping Scale. Multivariable logistic regression with a stepwise variable selection method was used to identify associations. Results: A total of 2,353 staff participated; the mean age (± SD) was 43(± 10) years and 61% were females. Most staff (85%) did not feel job insecurity, one-third (29%) perceived burnout in their jobs, more than two-thirds (73%) experienced moderate to very high levels of psychological distress, and more than half (58%) exhibited medium to high resilient coping. Perceived job insecurity was associated with staff working part-time [Adjusted Odds Ratio 1.53 (95% Confidence Intervals 1.15–2.02)], having an academic appointment [2.45 (1.78–3.27)], having multiple co-morbidities [1.86 (1.41–2.48)], perceived burnout [1.99 (1.54–2.56)] and moderate to very high level of psychological distress [1.68 (1.18–2.39)]. Perceived burnout was associated with being female [1.35 (1.12–1.63)], having multiple co-morbidities [1.53 (1.20–1.97)], perceived job insecurity [1.99 (1.55–2.57)], and moderate to very high levels of psychological distress [3.23 (2.42–4.30)]. Staff with multiple co-morbidities [1.46 (1.11–1.92)], mental health issues [2.73 (1.79–4.15)], perceived job insecurity [1.61 (1.13–2.30)], and perceived burnout [3.22 (2.41–4.31)] were associated with moderate to very high levels of psychological distress. Staff who perceived their mental health as good to excellent [3.36 (2.69–4.19)] were more likely to have medium to high resilient coping. Conclusions: Factors identified in this study should be considered in reviewing and updating current support strategies for staff at HE institutions across all countries to reduce stress and burnout and improve wellbeing. © The Author(s) 2024. **Please note that there are multiple authors for this article therefore only the name of the first 30 including Federation University Australia affiliate “Muhammad Aziz Rahman, Pritmoy Das, Sheikh Alif, Masudus Salehin, Biswajit Banik, Bindu Joseph, Parul Parul, Andrew Lewis, Dixie Statham, Joanne Porter, Wendy Cross, Remco Polman” is provided in this record*
A CASE REPORT ON PSORIASIS VULGARIS WITH KNOWN CASE OF REITERS'S SYNDROME AND PSORIASIS ARTHRITIS WITH SPLEENOMEGALY AND HERPES PROGENITALIS
No full textPsoriasis is a chronic autoimmune skin disease with systemic dermatosis characterized by hyperproliferation and inflammation of the skin. Psoriasis Arthritis (PsA) is arthropathy which includes numerous “domains”, such as axial disease, peripheral arthritis, enthesis’s, dactylitis, and skin or nail disease. Reiter’s syndrome also known as reactive arthritis, is the classic triad of conjunctivitis, urethritis, and arthritis occurring after an infection. Splenomegaly is enlargement of the spleen measured by size or weight. Herpes progenitalis is sexually transmitted infection which is caused by the herpes simplex virus type 2 (HSV-2) or herpes simplex virus type 1 (HSV-1). The patient had multiple disease conditions. Despite on standard therapy with Methotrexate and topical corticosteroids and other symptomatic relieving agents the patient was unable to recover, leading to disease progression. Hence, it becomes necessary to evaluate the balance between benefits and risks of therapeutic agents, while developing strategies on how to fill up the gaps between characteristics of any individual patient along with presence of complex disease related aspects.Corresponding Author
Priyancy Patel
Department of Pharmacy
Practice, Parul Institute of
Pharmacy & Research, Parul
University, Vadodara,
Gujarat, Indi
DIFFERENT METABOLIC PATHWAYS IN DIABETIC KIDNEY DISEASE AND RECENT ADVANCES IN SLOWING DISEASE PROGRESSION
No full textGlobally, diabetic kidney disease (DKD) is the leading cause of end-stage renal disease. As the most common microvascular complication of diabetes, DKD is a thorny, clinical problem in terms of its diagnosis and management. Intensive glucose control in DKD could slow down but not significantly halt disease progression. Revisiting the tremendous advances that have occurred in the field would enhance recognition of DKD pathogenesis as well as improve our understanding of translational science in DKD in this new era. In this review, we summarize advances in the understanding the local microenvironmental changes in diabetic kidneys and discuss the involvement of genetic factors in the pathogenesis of DKD. The review also focuses on understanding how the hemodynamic, metabolic, inflammatory, and alternative pathways are all entangled in pathogenesis of DKD and discuss various conventional and novel therapeutic targets that may play role in slowing DKD.*Corresponding Author: S. P. Srinivas Nayak
Assistant Professor, Dept. of Pharmacy Practice, Parul Institute of Pharmacy and Research, Parul University, Vadodara, Gujara
CASE REPORT: MIXED CONNECTIVE TISSUE DISEASE (MCTD)
No full textBackground:The term mixed connective tissue disease (MCTD) was coined by Sharp and colleagues in 1972 proving to that mixed connective tissue disease a systemic autoimmune disease which involves antibodies like anti-sm, Ro-52 recombinant, nucleosome,anti-Jo-1,anti ds-DNA,etc. Case presentation: A 28-year-old lady presented with complaints of multiple joint pain since 3 days along with weakness. She also complained about low grade fever associated with chills and rigor, vomiting, headache and body ache. There was involvement of morning stiffness in small joints of fingers and toes. Reports were done and she was eventually treated according to it. Conclusion: The work has reported a rare case of an adult patient with MCTD characterized by a severe multiple joint pain along with severe weakness and positive AntiU1-RNP levels and was treated with corticosteroid (Prednisolone), Methotrexate and analagesic (Tramadol and Paracetamol).*Corresponding Author: S P Srinivas Nayak*
Assistant Professor, Department of Pharmacy Practice, Parul Institute of
Pharmacy and Research,Parul University,Vadodara,Gujarat
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