Grid-connected PV inverter system control optimization using Grey Wolf optimized PID controller.

This paper introduces a robust and adaptive control framework that integrates a Proportional-Integral-Derivative (PID) controller with the bio-inspired Grey Wolf Optimization (GWO) algorithm for real-time tuning of controller parameters in grid-connected photovoltaic (PV) inverter systems. Conventional controllers such as P and PI are widely used in PV applications due to their simplicity, but they exhibit notable limitations in dynamic environments, including increased Total Harmonic Distortion (THD), slower transient response, and poor voltage regulation-particularly under variable irradiance conditions. The proposed GWO-PID method overcomes these limitations by leveraging the GWO algorithm's global search capability to dynamically optimize the PID gains (K, K, K) based on a composite fitness function that minimizes Mean Squared Error (MSE) and THD.

Stillbirth rate and maternal risk factors for antenatal stillbirth in Bihar: A hospital-based cross-sectional study.

Background And Objectives: The prevalence and risk factors of stillbirths vary across geographical and socioeconomic contexts, extending beyond maternal and fetal factors. Many of these risks are preventable with quality pregnancy care. Prevention relies on recognizing and appropriately addressing these factors.

Delay in the diagnosis of oral cancer in India, time to focus toward capacity building of physicians: A prospective observational study.

Background: Delay in diagnosis of head and neck cancers is responsible for advanced presentation of the disease leading to increased morbidity and mortality.

Methods: A questionnaire-based prospective observational study consisting of 150 patients was performed in a tertiary care center established in North India. The factors responsible for professional and patient delay including demographic details and the clinical examination findings, health-related behavior, socio-economic status based on modified Kuppuswamy's scale, and the health care factors were also evaluated.

Band Adhesion Causing Intestinal Obstruction Without Previous Surgery in Pregnancy: A Rare Case.

Intestinal obstruction (IO) during pregnancy is a rare occurrence. Although uncommon, IO in pregnancy carries a significant risk of maternal and fetal mortality. Diagnosing IO can be challenging, as abdominal pain and vomiting in pregnant patients may be mistaken for labor pain or hyperemesis gravidarum.

Uterus-Preserving Management of Intractable Haemorrhage Following Suction and Evacuation: A Case Series.

Suction and evacuation (S&E) is a very common procedure in obstetric patients with minimal blood loss. Although rare, in cases of secondary postpartum haemorrhage (PPH) due to retained products of conception (RPOC) following delivery (vaginal or caesarean section) and in hydatidiform mole, there is a chance of intractable haemorrhage, following S&E, which may require a hysterectomy. Hysterectomies not only lead to premature menopause but also increase overall morbidity and risk of mortality to the patient.

Comparison of Hadlock and INTERGROWTH-21st Growth Charts for Estimating Fetal Weight in the Third Trimester via Ultrasound.

Introduction Early identification of growth abnormalities is crucial in preventing fetal death and ensuring optimal care for fetuses requiring close monitoring and timely delivery. Sonographic estimation of fetal weight must be quantified in centiles according to gestational age reference charts to assess fetal growth velocity and size. These measurements can categorize the fetus as small, appropriate, or large for gestational age.

An uncommon cause of acute hypercapnic respiratory failure managed with endoscopic ultrasound.

Mediastinal cysts can occasionally cause severe respiratory symptoms. A 60-year-old female smoker presented with acute hypercapnic respiratory failure. Imaging revealed a posterior mediastinal cyst compressing the trachea.

Analysis of Gillies Temporal Approach vs Towel Clip Method for Reduction of Zygoma Fractures.

Purpose: The purpose of this study was to analyse Gillies Temporal approach Vs Towel Clip method for reduction of zygoma fractures.

Method: A randomised comparative study was conducted on 30 patients having zygoma fractures confirmed with pre-operative NCCT face with 3 D reconstruction. Patients were divided into 2 groups, Group-1- Gillies temporal approach and Group-2- Towel clip method.

Evaluation of Maxillary Sinus Septa Using Cone Beam Computed Tomography (CBCT): A Retrospective Study.

Background: Maxillary sinus septa, which are bony structures dividing the sinus cavity, can pose challenges during sinus lift or implant surgeries by potentially causing perforation of the Schneiderian membrane. This study aimed to estimate the prevalence, height, location, orientation, and risk of perforation of the maxillary sinus septa using cone beam computed tomography (CBCT).

Materials And Methods: This retrospective, cross-sectional study utilized CBCT (NewTom CBCT machine, of which the scan parameters were 90 KvP, 8 mAs, and 14 s exposure with a field of view (FOV) of 8×8 cm and a 0.

The Minimum Dietary Diversity for Women (MDD-W) Score: Its Association With the Prevalence and Severity of Anemia in Pregnancy.

Background: Anemia during pregnancy is a very common medical disorder and is usually related to poor dietary nutrients.

Objective:  The objective of this study was to study the Minimum Dietary Diversity for Women (MDD-W) score during pregnancy and its correlation with the prevalence and severity of anemia in a tertiary referral hospital.

Material And Method: A total of 430 women in their second and third trimesters of pregnancy were included and details of sociodemographic, obstetric, and nutritional factors were asked from all participants.

Mechanical Tuning of Fluorescence Lifetime and Bandgap in an Elastically Flexible Molecular Semiconductor Crystal.

Despite having superior transport properties, lack of mechanical flexibility is a major drawback of crystalline molecular semiconductors as compared to their polymer analogues. Here single crystals of an organic semiconductor are reported that are not only flexible but exhibit systematic tuning of bandgaps, fluorescence lifetime, and emission wavelengths upon elastically bending. Spatially resolved fluorescence lifetime imaging and confocal fluorescence microscopy reveals systematic trends in the lifetime decay across the bent crystal region along with shifts in the emission wavelength.

Parental concerns about oral health of children: Is ChatGPT helpful in finding appropriate answers?

Introduction: Artificial intelligence (AI) is becoming an important part of our lives owing to increased data availability and improved power of computing. One of the recently launched modalities of AI, ChatGPT, is being enormously used worldwide for different types of tasks. In medical context, its use is being explored for clinical queries, academia, research help, etc.

Enhancing Proliferation of Stem Cells from Human Exfoliated Deciduous Teeth (SHED) through hTERT Expression while Preserving Stemness and Multipotency.

Background: Stem cells from human exfoliated deciduous teeth (SHED) hold promise in regenerative medicine owing to their multipotent capabilities resembling mesenchymal stem cells (MSCs). Despite their potential, SHED have not been extensively investigated because their limited lifespan and unavailability of cell-lines pose challenges for therapeutic applications. This study investigated the effect of ectopic human telomerase reverse transcriptase (hTERT) expression on SHEDs' proliferation while preserving stemness and genomic integrity.

Deeper Insights into Mixed Crowding through Enzyme Activity, Dynamics, and Crowder Diffusion.

Given the fact that the cellular interior is crowded by many different kinds of macromolecules, it is important that studies be carried out in the presence of mixed crowder systems. In this regard, we have used binary crowders formed by the combination of some of the commonly used crowding agents, namely, Ficoll 70, Dextran 70, Dextran 40, and PEG 8000 (PEG 8), to study how these affect enzyme activity, dynamics, and crowder diffusion. The enzyme chosen is AK3L1, an isoform of adenylate kinase.

Cleidocranial dysplasia associated with dentigerous cyst-review of literature and case report of two siblings.

Cleidocranial dysplasia (CCD) is a developmental anomaly of the skeleton and teeth which may be inherited, be transmitted as dominant characteristics in either male or female or even appear spontaneously. A case was reported in the department of oral medicine and radiology of two sisters age 17 and 19 years old with a chief complaint of milk teeth not falling since childhood. They presented specific physical and oral findings in common which suggested the idea of an undiagnosed syndrome.

Design, synthesis, characterization, in vitro cytotoxic, antimicrobial, antioxidant studies, DFT, thermal and molecular docking evaluation of biocompatible Co(II) complexes of NO-macrocyclic ligands.

Bioactive cobalt (II) macrocyclic complexes [Co(NOML)Cl]-[Co(NOML)Cl] have been synthesized by using the macrocyclic ligands [NOML], [NOML], and [NOML] that have an NO core. These three macrocyclic ligands were all isolated in pure form, together with their complexes. Microanalytical investigations, FT-IR NMR, Mass, magnetic moments, electronic, PXRD, TGA, and EPR spectrum studies were used to analyse their structures.

Analysis of the Variations in the Morphology, Topography of the Pterion, and Their Implications in Neurosurgery: An Osteometric Study.

 Pterion is an "H" shaped formation of sutures located in the temporal fossa of the skull. It is an important anatomical landmark and a craniometric point. The thinness of the skull and its inner relation with the middle meningeal artery make this anatomical landmark clinically significant.

Neglected extensive osteomyelitis of the pelvis, femur, and vertebra in an immunocompetent patient: A case report.

infections of the appendicular skeleton are rare. A 72-year-old female presented with pain and deformity in her left lower limb and an inability to bear weight that had persisted for the last six months. A femur biopsy confirmed the diagnosis of extensive osteomyelitis, and the patient was treated with amphotericin B and oral voriconazole.

Primary signet ring cell carcinoma of prostate: A rare case report and review of literature.

Primary signet ring cell carcinoma (PSRCC) of the prostate is an extremely rare variant of prostatic adenocarcinoma. A PubMed search of the English language literature from January 2000 to June 2020 using the keywords "signet ring cell carcinoma" and "prostate," identified 20 cases of PSRCC of the prostate. On the basis of the combined data from this study and the literature review, 21 such patients were evaluated for clinical characteristics, histologic diagnoses, special and immunohistochemical staining, and treatment.

Repositioning the existing drugs for neuroinflammation: a fusion of computational approach and biological validation to counter the Parkinson's disease progression.

Parkinson's disease is caused by the deficiency of striatal dopamine and the accumulation of aggregated α-synuclein in the substantia nigra pars compacta (SNpc). Neuroinflammation associated with oxidative stress is a key factor contributing to the death of dopaminergic neurons in SNpc and advancement of Parkinson's disease. Two molecular targets, i.