Stabilised Control of Converter Interfaced DERs for Reliable Operation of Microgrid and Microgrid Clusters

This thesis aims to achieve a stabilised control of converter interfaced DER for the reliable and resilient operation of microgrid and microgrid clusters. The suitability of voltage and current control for VSCs is evaluated and corrective measures are proposed to stabilise converter operation. Furthermore, the accurate power demand distribution in islanded MGs and interconnected MGs are ensured by advanced control strategies. The proposal presented in the thesis is verified both through simulation and experimental work

Uterine Pseudoaneurysm: A rare cause of delayed postpartum haemorrhage managed with uterine artery embolisation

MEDICAL IMAG

Estimating the weight of ethnically diverse children attending an Australian emergency department: a prospective, blinded, comparison of age-based and length-based tools including Mercy, PAWPER and Broselow

Objective To prospectively compare the actual weights of Australian children in an ethnically diverse metropolitan setting with the predicted weights using the Paediatric Advanced Weight Prediction in the Emergency Room (PAWPER) tape, Broselow tape, Mercy system and calculated weights using the updated Advanced Paediatric Life Support (APLS), Luscombe and Owens and Best Guess formulae. Methods A prospective, cross-sectional, observational, blinded, convenience study conducted at the Children’s Hospital at Westmead Paediatric Emergency Department in Sydney, Australia. Comparisons were made using Bland-Altman plots, mean difference, limits of agreement and estimated weight within 10% and 20% of actual weight. Results 199 patients were enrolled in the study with a mean actual weight of 27.2 kg (SD 17.2). Length-based tools, with or without body habitus adjustment, performed better than age-based formulae. When measuring estimated weight within 10% of actual weight, PAWPER performed best with 73%, followed by Mercy (69%), PAWPER with no adjustment (62%), Broselow (60%), Best Guess (47%), Luscombe and Owens (41%) and revised APLS (40%). Mean difference was similar across all methods ranging from 0.4 kg (0.0, 0.9) for Mercy to −2.2 kg (−3.5, −0.9) for revised APLS. Limits of agreement were narrower for the lengthbased tools (−5.9, 6.8 Mercy; −8.3, 5.6 Broselow; −9.0, 7.1 PAWPER adjusted; −12.1, 9.2 PAWPER unadjusted) than the age-based formulae (−18.6, 17.4 Best Guess; −19.4, 15.1 revised APLS, −21.8, 17.7 Luscombe and Owens). Conclusion In an ethnically diverse population, lengthbased methods with or without body habitus modification are superior to age-based methods for predicting actual body weight. Body habitus modifications increase the accuracy and precision slightly

Whom to blame for brain health and appetite slump in toddlers? A narrative review

Abstract Food preference in children depends on the interplay between genetic and environmental factors. Exposure to flavors during prenatal and postnatal period through amniotic fluid, breast milk, and weaning foods have been identified as possible influences on food preference and acceptance in children. Therefore, maternal nutrition has a strong influence on the child’s food preference early in life. Aim: The authors carried out a narrative review to understand the contribution of maternal nutrition on the food preferences in children in later life. Methods: The authors retrieved the articles from SCOPUS, Medline, Science Direct, CINAHL, EBSCO, and PubMed central databases. The key words including food preferences, food choice, and acceptance of food, pregnant women, toddlers, and food culture were used to identify the appropriate articles. The authors included in the review, full-text articles, published in English language between 1995 and 2018. In total, six articles, which met the inclusion criteria, were included in the final review. Results: The results revealed that there is a very strong connection between the exposure to flavors during prenatal and postnatal period and food preference and acceptance in children in later life. The olfactory and gustatory exposures to flavors during prenatal period through maternal diet, and during postnatal period through breast milk and weaning foods determines the food preferences in childhood. Conclusion: We conclude that maternal nutrition has a strong influence on the child’s food preference early in the life, therefore effective strategies should be designed to increase healthy feeding choices during the prenatal and postnatal periods

Custom order entry for Parkinson’s medications in the hospital improves timely administration: an analysis of over 31,000 medication doses

Background: Patients with Parkinson's disease (PD) are at increased risk for hospital acquired complications. Deviations from home medication schedules and delays in administration are major contributing factors. We had previously developed a protocol to ensure adherence to home medication schedules using "custom" ordering. In this study we are assessing the impact this order type may have on reducing delays in PD medication administration in the hospital. Material and methods: We reviewed 31,404 orders placed for PD medications from January 2, 2016 to April 30 2021. We evaluated the orders to determine if they were placed in a Custom format or using a default non-custom order entry. We further evaluated all orders to determine if there was a relationship with the order type and timely administration of medications. We compared medications that were administered within 1 min, 15 min, 30 min and 60 min of due times across custom orders vs. non-custom default orders. We also evaluated the relationship between ordering providers and type of orders placed as well as hospital unit and type of orders placed. Results: 14,204 (45.23%) orders were placed using a custom schedule and 17,200 (54.77%) orders were placed using non-custom defaults. The custom group showed a significantly lower median delay of 3.06 minutes compared to the non-custom group (p<.001). Custom orders had a significantly more recent median date than non-custom default orders (2019-10-07 vs. 2018-01-06, p<0.001). In additional analyses, medication administration delays were significantly improved for custom orders compared to non-custom orders, with likelihoods 1.64 times higher within 1 minute, 1.40 times higher within 15 minutes, and 1.33 times higher within 30 minutes of the due time (p<0.001 for all comparisons). Conclusion: This is the largest study to date examining the effects of order entry type on timely administration of PD medications in the hospital. Orders placed using a custom schedule may help reduce delays in administration of PD medications

Giant response and selectivity of Hansen solubility parameters-based graphene-SBS co-polymer matrix composite room temperature sensor to organic vapours

A styrene-butadiene-styrene co-polymer matrix nanocomposite filled with graphene nanoplatelets was studied to prepare chemiresistive volatile organic compounds (VOCs) room temperature sensors with considerable response and selectivity. Nanofiller concentration was estimated from the electrical conductivity percolation behaviour of the nanocomposite. Fabricated sensors provided selective relative responses to representative VOCs differing by orders of magnitude. Maximum observed average relative responses upon exposure to saturated vapours of the tested VOCs were ca. 23% for ethanol, 1600% for acetone, and the giant values were 9 × 106% for n-heptane and 10 × 106% for toluene. The insensitivity of the sensor to the direct saturated water vapour exposure was verified. Although high humidity decreases the sensor’s response, it paradoxically enhances the resolution between hydrocarbons and polar organics. The non-trivial sensing mechanism is explained using the Hansen solubility parameters (HSP), enabling a rational design of new sensors; thus, the HSP-based class of sensors is outlined.DKRVO, (RP/CPS/2022/007); Ministerstvo Školství, Mládeže a Tělovýchovy, MŠMT; Univerzita Tomáše Bati ve Zlíně, UTB, (IGA/CPS/2022/002, IGA/CPS/2023/006)Ministry of Education, Youth, and Sports of the Czech Republic-DKRVO [RP/CPS/2022/007]; Tomas Bata University in Zlin [IGA/CPS/2022/002, IGA/CPS/2023/006

Molecular Modeling and Docking Studies of Neu5Ac2en analogues against Cholera toxin

Abstract Neu5Ac2en (2-deoxy-2, 3-didehydro-N-acetylneuraminic acid

State Dependent Effects of Transcranial Rotating Permanent Magnet Stimulation of the Primary Motor Cortex

Non-invasive devices that stimulate the brain can enhance or suppress neuronal activity depending on the frequency, rate, and duration of stimuli. These devices can be useful in brain research, and may help diagnose and treat neuropsychiatric diseases in the future. For example, previous studies have shown that non-invasive brain stimulation alters the activity of cortical neurons. Stimulation of the primary motor cortex (PMC) activates muscles on the opposite side of the body because motor neurons within it control contralateral voluntary movements. Our aim was to study the effects on cerebral cortical and peripheral muscle activities produced by short continuous oscillatory stimuli delivered by the TRPMS device to a target PMC site. At the end of our study we found that there were state dependent increases in muscle response after the stimulation of the corresponding cortex. This project was completed with constributions from Santosh Helekar from the Houston Methodist Research Institute.Biology and Biochemistry, Department ofHonors Colleg

A DC power exchange highway based power flow management for interconnected microgrid clusters

In this paper, the concept of dc power exchange highway (DCPEH) is introduced to interconnect a cluster of ac microgrids (MGs) to facilitate an efficient and resilient energy system. A power flow controller is proposed to manage the power flow between an MG and DCPEH, based on local load demand, surplus power, and power shortfall of an individual MG. This control integrated with DCPEH will improve the resiliency and reliability of MG clusters by utilizing the maximum available power from uncertain distributed energy resources (DERs) like solar or wind energy conversion systems in individual MGs. Each MG is connected to the DCPEH through an active front-end converter and a storage capacitor. The converter holds the dc voltage at a predefined value. A dynamic droop control for the DCPEH is adopted to effectively distribute the power demand between MGs. In this paper, it has been assumed that the cluster operates autonomously with the presence of a utility grid. It has been further assumed that the MGs are dominated by converter interfaced DERs, and hence, the power sharing is performed using angle droop control. To verify the efficacy of the interconnected MG clusters using DCPEH, various simulation studies are conducted using power system computer aided design electro magnetic transient design and control