Multiobjective optimal TCSC placement using multiobjective grey wolf optimizer for power losses reduction.

This study investigates the application of the multiobjective grey wolf optimizer (MOGWO) for optimal placement of thyristor-controlled series compensator (TCSC) to minimize power loss in power systems. Two conflicting objectives are considered: (1) minimizing real and reactive power loss, and (2) minimizing real power loss and TCSC capital cost. The Pareto-optimal method is employed to generate the Pareto front for these objectives. The fuzzy set technique is used to identify the optimal trade-off solution, while the technique for order preference by similarity to the ideal solution suggests multiple optimal solutions catering to diverse utility preferences. Simulations on an IEEE 30 bus test system demonstrate the effectiveness of TCSC placement for power loss minimization using MOGWO. The superiority of MOGWO is confirmed by comparing its results with those obtained from a multiobjective particle swarm optimization algorithm. These findings can assist power system utilities in identifying optimal TCSC locations to maximize their performance.

Energy curve based enhanced smell agent optimizer for optimal multilevel threshold selection of thermographic breast image segmentation.

Multilevel thresholding image segmentation will subdivide an image into several meaningful regions or objects, which makes the image more informative and easier to analyze. Optimal multilevel thresholding approaches are extensively used for segmentation because they are easy to implement and offer low computational cost. Multilevel thresholding image segmentation is frequently performed using popular methods such as Otsu's between-class variance and Kapur's entropy. Numerous researchers have used evolutionary algorithms to identify the best multilevel thresholds based on the above approaches using histogram. This paper uses the Energy Curve (EC) based thresholding method instead of the histogram. Chaotic Bidirectional Smell Agent Optimization with Adaptive Control Strategy (ChBSAOACS), a powerful evolutionary algorithm, is developed and employed in this paper to create and execute an effective method for multilevel thresholding segmentation of breast thermogram images based on energy curves. The proposed algorithm was tested for viability on standard breast thermogram images. All experimental data are examined quantitatively and qualitatively to verify the suggested method's efficacy.

Design and implementation of single DC-link based three-phase multilevel inverter with CB-PWM techniques.

Simulation and implementation of a single DC-link-based three-phase inverter are investigated in this article. The primary focus is on designing a single DC-link three-phase inverter for high power applications. Unlike conventional inverters that require 600 V to generate 400 V (RMS) at the output, the proposed system achieves this with only 330 V, facilitated by a 12-terminal 1:1 transformer. The system employs Proportional Integral (PI) and Neural Network (NN) controllers to optimize performance. Various Carrier-Based Pulse Width Modulation (CB-PWM) techniques, including Phase Disposition (PD), Phase Opposition Disposition (POD), and Alternative Phase Opposition Disposition (APOD), are implemented and evaluated based on Total Harmonics Distortion (THD) concerning the Modulation Index (MI) of the inverter. The proposed inverter achieves a THD reduction to 4.8%, demonstrating superior performance compared to recent studies. The system's performance is validated through extensive MATLAB/Simulink simulations and practical implementation using XILINX FPGA software, confirming the efficacy of the proposed design.

Appropriate analysis on properties of various compositions on fluids with and without additives for liquid insulation in power system transformer applications.

Transformer is a well-known power system apparatus utilized in conjunction with solid insulations such as paper and press board, as well as liquid insulations like mineral oil, a petroleum-based fluid. Despite the notable drawbacks associated with mineral oil, such as limited resources for future generations and its non-eco-friendly nature, its usage remains ubiquitous. There is a growing imperative to explore alternative fluids that surpass mineral oil in terms of environmental impact and performance. Amidst the global shift towards green energy, this study focuses on vegetable seed oils such as corn oil, soybean oil, mustard oil, and rice bran oil as potential substitutes. The research evaluates these oils based on key transformer properties including breakdown voltage, water content, interfacial tension, viscosity, acidity, flash point, and fire point. Interestingly, rice bran oil and soybean oil exhibit promising characteristics that suggest they could effectively replace petroleum-based fluids in transformers. Furthermore, the study extends to blending mineral oil with vegetable seed oils in various compositions, incorporating natural and synthetic antioxidant additives ranging from 0 to 1%. Comparative analyses between samples with and without additives reveal that the inclusion of 1% propyl gallate yields outstanding performance improvements. For instance, a blend comprising 25 ml of mineral oil and 25 ml of soybean oil, supplemented with 1% propyl gallate, demonstrates 90% higher effectiveness compared to other blends and additives tested. Moreover, the research employs statistical regression analysis to establish relationships between different parameter variables, providing deeper insights into the performance and compatibility of these blended oils in transformer applications. This comprehensive investigation underscores the potential of vegetable seed oils as viable alternatives to mineral oil, contributing to the advancement of eco-friendly solutions in power systems.

Smart distribution network voltage estimation using PMU technology considering zero injection constraints.

To properly control the network of the power system and ensure its protection, Phasor measurement units (PMUs) must be used to monitor the network's operation. PMUs can provide synchronized real-time measurements. These measurements can be used for state estimation, fault detection and diagnosis, and other grid control applications. Conventional state estimation methods use weighting factors to balance the different types of measurements, and zero injection measurements can lead to large weighting factors that can introduce computational errors. The offered methods are designed to ensure that these zero injection criteria can be strictly satisfied while calculating the voltage profile and observability of the various distribution networks without sacrificing computing efficiency. The proposed method's viability is assessed using standard IEEE distribution networks. MATLAB coding is used to simulate the case analyses. Overall, the study provides a valuable contribution to the field of power distribution system monitoring and control by simplifying the process of determining the optimal locations for PMUs in a distribution network and assessing the impact of ZI buses on the voltage profile of the system.

Cause-Specific Mortality Among Adults Aged ≥65 Years in the United States, 1999 Through 2020.

OBJECTIVE: Reports on recent mortality trends among adults aged ≥65 years are lacking. We examined trends in the leading causes of death from 1999 through 2020 among US adults aged ≥65 years. METHODS: We used data from the National Vital Statistics System mortality files to identify the 10 leading causes of death among adults aged ≥65 years. We calculated overall and cause-specific age-adjusted death rates and then calculated the average annual percentage change (AAPC) in death rates from 1999 through 2020. RESULTS: The overall age-adjusted death rate decreased on average by 0.5% (95% CI, -1.0% to -0.1%) per year from 1999 through 2020. Although rates for 7 of the top 10 causes of death decreased significantly, the rates of death from Alzheimer disease (AAPC = 3.0%; 95% CI, 1.5% to 4.5%) and from unintentional injuries (AAPC = 1.2%; 95% CI, 1.0% to 1.4%), notably falls (AAPC = 4.1%; 95% CI, 3.9% to 4.3%) and poisoning (AAPC = 6.6%; 95% CI, 6.0% to 7.2%), increased significantly. CONCLUSION: Public health prevention strategies and improved chronic disease management may have contributed to decreased rates in the leading causes of death. However, longer survival with comorbidities may have contributed to increased rates of death from Alzheimer disease and unintentional falls.

CT-based retrospective cohort study for the evaluation of mandibular condylar dimensions - A pilot study.

Background: The temporomandibular joint (TMJ) is a unique structure of the body where the mandible, one of the important facial bones, articulates with the temporal part of the skull bone. Obtaining morphometric dimensions for mandibular condyle is important for performing an accurate pre/postoperative assessment, planning temporomandibular and orthognathic surgeries, and applications in forensic sciences in context to the Indian population, which is presently based on dimensions of Caucasian population from available literature. Several investigators noticed the variation in the craniofacial morphology in different ethnic groups and vary according to age and sex. This study aims to provide the normal dimensions of the mandibular condyle in the Indian population, which would be providing racially specific values for diagnosis, treatment planning of surgeries involving condylar processes such as rigid internal fixation of TMJ region, congenital deformities, and customizing TMJ prosthesis concerning these measurements. Aim of the Study: To measure the change in dimensions of mandibular condyle according to age and sex using computed topographic scan imaging. Objectives of the Study: 1. To measure the dimensions of mandibular condyle. 2. To evaluate any age-related changes in dimensions. of mandibular condyle (intercohort comparison). 3. To evaluate any sex-related changes in dimensions of mandibular condyle (intercohort comparison). Materials and Methods: A retrospective analytical cohort study. Inclusion Criteria: Indian adult males and females aged between 20 and 50 years who underwent facial computed tomography (CT) for any reason (e.g., head injury). Exclusion Criteria: Patients with congenital or acquired dentofacial deformities involving TMJ. Data Collection: By assessing the morphometric dimensions of condyle of mandible using CT scan images. Result/Conclusion: Mean condylar dimensions for each age/sex cohort are established; however, no significant change as per age and sex in condylar dimensions in the Indian population is noted.

Quantifying the role of antecedent Southwestern Indian Ocean capacitance on the summer monsoon rainfall variability over homogeneous regions of India.

The role of ocean variability is at a focal point in improving the weather and climate forecasts at different spatial and temporal scales. We study the effect of antecedent southwestern Indian Ocean mean sea level anomaly (MSLA) and sea surface temperature anomalies (SSTA) as a proxy to upper ocean heat capacitance on all India summer monsoon rainfall (AISMR) during 1993-2019. SSTA and MSLA over the southwestern Indian Ocean (SWIO) have been influenced by El Niño-Southern Oscillation (ENSO), the impact of ENSO-induced SWIO variability was low on rainfall variability over several homogeneous regions. Rainfall over northeast (NE) and North India (EI) has been modulated by ENSO-induced SSTA and MSLA over SWIO, thus effecting the total AISMR magnitude. The ENSO-induced changes in heat capacitance (SSTA and MSLA) over SWIO during antecedent months has less impact on west coast of India, central India and North India (NI) rainfall variability. The long-term trend in pre-monsoonal SSTA and MSLA over SWIO shows decreasing rainfall trend over NI, NE, and EI in the recent time. Furthermore, the cooler (warmer) anomaly over the western Indian Ocean affects rainfall variability adversely (favourably) due to the reversal of the wind pattern during the pre-monsoon period. While SSTA and MSLA are increasing in the SWIO, large-scale variability of these parameters during preceding winter and pre-monsoon months combined with surface winds could impact the inter-annual AISMR variability over homogeneous regions of India. Similarly, from an oceanic perspective, the antecedent heat capacitance over SWIO on an inter-annual time scale has been the key to the extreme monsoon rainfall variability.

The effect of modern devices of alveolar ridge split and expansion in the management of horizontally deficient alveolar ridge for dental implant: A systematic review.

The alveolar ridge split and expansion (ARSE) can be performed using conventional devices (osteotome/chisel) or modern devices (ultrasonographic [USG], motorized ridge expansion [MRE], etc.). The aim of this systematic review was to evaluate the effect of modern devices for ARSE. This review has been registered at PROSPERO under the number CRD42020213264. A systematic search was conducted by two reviewers independently in databases PubMed, MEDLINE, Cochrane Central Register of Controlled Trials, Grey Open, Hand search of reference lists of relevant studies, and previously published systematic reviews. The article published until September 2020 were searched for this review. The searches identified 24 eligible studies, twenty-two cohort and two randomized control trial studies. A total of 1287 dental implants were installed in 634 patients with the age range of 17-70 years and a minimum of 3 months of follow-up. Ten articles of USG device and seven of MRE device were finally evaluated for metanalysis. The mean ridge width gain was 3.40 mm (USG device) and 2.83 mm (MRE device). The overall implant survival rate was 98.07%. Mean width gain between USG and MRE devices was significantly different (P < 0.0001, HS). Test of heterogeneity was significant (Q = 88.3877, P < 0.0001, HS) and there was no publication bias (Intercept = 6.6634, P = 0.6142, NS) by Egger's test. The most commonly used devices were USG and MRE. USG is more effective for osteo-mobilization type and MRE device for minimally invasive osteo-condensation.

Realizing quasi-monochromatic switchable thermal emission from electro-optically induced topological phase transitions.

Explorations into the photonic analogs of topological materials have garnered significant research interest due to their application potential. Particularly in planar systems, the prospects of engendering extinguishable topological states can have wide-ranging implications. With an objective of employing these concepts for thermal emission engineering, here, we design and numerically investigate a quasi-monochromatic highly directional mid-infrared source elicited from inversion symmetry-protected topological interface states. Notably, by relying on the architecture of electro-optic effect-induced topological phase transitions, we introduce the possibility of ultrafast switching of thermal radiation. These reversible phase transitions, being free from carrier transport are inherently fast and evoke thermal emission modulation with a modulation depth upto 0.99. Specifically, our platform exhibits a near-perfect extinguishable spectral emission peak at [Formula: see text]m with a quality factor of over 18500, displaying negligible parasitic emissions. Furthermore, the optimized interface state manifests itself for only one of the polarization modes, resulting in polarized emission under resonance conditions. To establish a methodical approach to parameter optimization, we also model our platform as a leaky mode resonator using the framework of temporal coupled-mode theory. We believe, our findings can provide a way forward in establishing complete control over the optical characteristics of the infrared thermal emitters.

ATOM technique: Anatomic reduction using screw-wire Traction for Open reduction and internal fixation of Mandibular fractures.

Various techniques are well documented to obtain anatomic reduction, such as reduction forceps, manual reduction, or a combination of these methods. However, these techniques have inherent drawbacks. We propose a new intra-operative technique for anatomic reduction using screw-wire traction for open reduction and internal fixation of mandibular fractures.

Experimental observation of Berreman modes in an uniaxial anisotropic nanoporous alumina film on aluminum substrate.

In this Letter, we demonstrate experimentally and verify numerically the excitation of Berreman modes that propagate in a dielectric film of uniaxial anisotropic nanoporous alumina grown on an aluminum substrate. It is an air-dielectric-metal asymmetric polaritonic system with a real part of the effective permittivity having a value near zero. The modes are excited at a wavelength lower than the epsilon-near-zero wavelength region. Minimum reflection is observed for the mid-infrared p-polarized light, while maximum reflection is observed for the s-polarized light. The experimental results are numerically reproduced for both p- and s-polarized light and confirm the excitation of Berreman modes in the system. At the exciting wavelength, the field is confined in the dielectric region near the air-dielectric interface. The reported system is straightforward and can be easily fabricated over a large scale and is helpful in a variety of mid-infrared applications such as thermal management systems, sensors, passive radiative cooling devices, nonlinear applications, and terahertz frequency generation.

Seasonal variation in fall-related emergency department visits by location of fall - United States, 2015.

INTRODUCTION: In the United States, fall-related emergency department (ED) visits among older adults (age 65 and older) have increased over the past decade. Studies document seasonal variation in fall injuries in other countries, while research in the United States is inconclusive. The objectives of this study were to examine seasonal variation in older adult fall-related ED visits and explore if seasonal variation differs by the location of the fall (indoors vs. outdoors), age group, and sex of the faller. METHODS: Fall-related ED visit data from the National Electronic Injury Surveillance System-All Injury Program were analyzed by season of the ED visit, location of the fall, and demographics for adults aged 65 years and older. RESULTS: Total fall-related ED visits were higher during winter compared with other seasons. This seasonal variation was found only for falls occurring outdoors. Among outdoor falls, the variation was found among males and adults aged 65 to 74 years. The percentages of visits for weather-related outdoor falls were also higher among males and the 65-74 year age group. CONCLUSIONS: In 2015, there was a seasonal variation in fall-related ED visits in the United States. Weather-related slips and trips in winter may partially account for the seasonal variation. PRACTICAL IMPLICATIONS: These results can inform healthcare providers about the importance of screening all older adults for fall risk and help to identify specific patients at increased risk during winter. They may encourage community-based organizations serving older adults to increase fall prevention messaging during winter.

Compliance of postoperative instructions following the surgical extraction of impacted lower third molars.

INTRODUCTION: The way postoperative care instructions are presented by the professional (verbal and/or written) is the key element that influences quality of treatment. Hence, the aim of the present study was planned to assess the patient's compliance with postoperative care instructions given in different forms following the surgical removal of impacted lower third molars. MATERIALS AND METHODS: Forty patients scheduled to undergo surgical extraction of impacted lower third molars under local anesthetic were randomly assigned to one of two groups. Before surgery, basic demographic data about age, gender, deleterious habits were recorded. Group A (verbal postoperative care instructions) and Group B (verbal + pictorial postoperative care instructions) were given with a prescription of medication after the surgical removal of impacted lower third molars. Patient were recalled on 7th postoperative day for suture removal and asked to fill the closed-ended questionnaire. RESULTS: Out of 20 patients in each group, one patient from Group A was eliminated as the patient did not turn for the follow-up visit. Therefore, result was based on 39 patients (19 males and 20 females) of age 28-41 years with a mean of 33.2 years (SD ± 3.3). The significance level was set at P < 0.05. The compliance of patients regarding gargling with lukewarm water and mouth opening exercises was seen more significantly in Group B (Pictorial + Verbal). CONCLUSION: Verbal instructions are inadequate due to difficulty in retention. Hence, a pictorial form of delivering postoperative instructions increases information retention which significantly increases pain relief without extending the analgesic consumption.

Microscopic evidence for Mn-induced long range magnetic ordering in MAX phase compounds.

Zero and low field nuclear magnetic resonance measurements have been performed on MAX phase samples (Cr1-x Mn x )2AC with A = Ge and Ga in order to obtain local microscopic information on the nature of magnetism in this system. Our results unambiguously provide evidence for the existence of long-range magnetic order in (Cr0.96Mn0.04)2GeC and for (Cr0.93Mn0.07)2GaC, but not for (Cr0.97Mn0.03)2GaC. We point to a possible dependence of long range magnetic order in these MAX phase compounds on the A atom.

Finding a way for airway: a retrospective study.

BACKGROUND: Maxillofacial trauma is complex kind of injury that requires complex treatment, hence it is difficult in selecting the type of intubation technique depending on trauma. With the advent of various technologies and devices, surgeon and anesthetist should select right method of intubation that will benefit patient. METHODS: In a retrospective study, patients of either sex, admitted in Lata Mangeshkar Hospital under Oral and Maxillofacial Surgery unit for treating maxillofacial trauma operated during year 2018 to year 2019 as elective basis were studied. RESULTS: Of 78 patients, the majority (37, 47.4%) were in the 21-30 age group, followed by the young adults 31-40 years age group (19, 24.3%). Mandible fracture was found to be the most common injury in 35 patients (44.3%) followed by fracture zygoma in 26(33.3%) patients and panfacial in eight patients (10.2%). There was frontal bone fracture in three patients (3.8%). Fiberoptic intubation under sedation was carried out in 34 (43.5%) and submental intubation in 20 (25.6%) and nasal intubation with direct visualization of vocal cords in 14 (17.9%) and blind nasal intubation was performed in eight (10.2%). CONCLUSIONS: The results of this study suggest that the old concept of securing the airway in difficult situation by tracheostomy should be revised.

Performance enhancement due to a top dielectric coating on a metamaterial perfect absorber.

A tri-layer metamaterial structure with enhanced absorption is demonstrated at infrared wavelengths by coating the top surface of the metamaterial absorber with an additional thin layer of dielectric material. The metamaterial absorber, which consists of a micrometer-sized metallic circular patch separated from a metal ground plane by a dielectric spacer layer, when coated with a supplementary protective dielectric layer on the top, shows a spectral red shift of the peak absorption along with a change in the absorption amplitude. The increase or decrease in absorption arises basically from an interference phenomenon of light reflected from the surface of the protective dielectric and the surface of metamaterial structures, and is highly dependent on the thickness of the top dielectric layer. The protective dielectric coatings provide an alternative way to modify and optimize the absorption in a metamaterial absorber along with a robustness that protects metamaterial structures from environmental and mechanical degradation.

Intensification of tidally generated internal waves in the north-central Bay of Bengal.

Flow of barotropic tidal currents over topographic features, such as continental slopes and submarine ridges, generates internal gravity waves at tidal periods known as internal tides. Amplitude of these waves are generally large near the generation regions. Analysis of Sea Surface Height (SSH) data, derived from satellite altimeter revealed the amplification of internal tides in the semidiurnal period in the north-central Bay of Bengal (BoB) (around 89[Formula: see text]E, 16[Formula: see text]N), which is about 450 km away from their generation sites. SSH signals found in the north-central BoB ([Formula: see text]3 cm) were comparable to the maximum amplitudes (2.5 to 3.5 cm) observed near their potential generation sites in the BoB such as continental slopes in the head of the bay and Andaman-Nicobar (AN) Ridge. Simulations from a high-resolution regional ocean model also confirmed the presence of large internal tide amplitude in the north-central BoB. Our study revealed that convergence of internal tides, which were generated along the concave-shaped source (continental slopes in the head of the bay and the northern parts of AN Ridge), into its focal region caused their amplification in the north-central BoB. It was also found that internal tide energy dissipation rates in this focal region were about 10 times larger than those in other open ocean regions.

Basin-wide sea level coherency in the tropical Indian Ocean driven by Madden-Julian Oscillation.

Changes in sea level may be attributed either to barotropic (involving the entire water column) or baroclinic processes (governed by stratification). It has been widely accepted that barotropic sea level changes in the tropics are insignificant at intraseasonal time scales (periods of 30-80 days). Based on bottom pressure records, we present evidence for significant basin-wide barotropic sea level variability in the tropical Indian Ocean during December-April with standard deviations amounting to ∼30-60% of the standard deviation in total intraseasonal sea level variability. The origin of this variability is linked to a small patch of wind over the Eastern Indian Ocean, associated with boreal winter Madden-Julian Oscillations (MJO). These large fluctuations are likely to play a prominent role in the intraseasonal sea level and mass budgets. Because of their much faster propagation than baroclinic processes, they allow the basin to adjust to climatic perturbations much more rapidly than was previously thought.