COMPACT DUAL-BAND CIRCULARLY POLARIZED ANTENNA FOR WIRELESS COMMUNICATIONS

P-shaped dual-band circularly polarized (CP) antenna for wireless communications with right-hand circular polarization (RHCP) and left-hand circular polarization (LHCP) is presented in this article. Optimized electrical volume of the proposed structure is 0.46λ 0 × 0.46λ 0 × 0.02λ 0 at 4.4 GHz resonant frequency. The measured -10 dB impedance bandwidths are 50.7% and 5.7% for (3.37-5.60 GHz) and (10.82-11.46 GHz) resonating bands at frequencies 4.4 GHz and 11.4 GHz respectively. The measured 3 dB impedance axial-ratio bandwidths for (4.65-5.13 GHz) and (11.21-11.52 GHz) bands are 9.7% and 2.7%. Agreement of simulation results with measured results ensure the excellent circular polarization at frequencies 4.96 GHz and 11.4 GHz

Urticarial rash of pregnancy turning into a rare and scary dermatosis of pregnancy: a case report and review of literature

Dermatosis of pregnancy encompasses a group of skin conditions that occurs due to interaction of multiple factors in the body during pregnancy or during post-partum period. We presented a case of 25-year-old G4P1L1A2 with initial symptom of urticarial rash which later progressed to a rare and a scary dermatosis of pregnancy which became a challenge both to the obstetrician and the dermatologist

To study the relation between spontaneous bacterial peritonitis and serum ascitis albumin gradient in chronic liver disease patients

Background: About half the patients with cirrhosis develop ascites during 10 years of observation. The present study was designed to study the relation between spontaneous bacterial peritonitis and serum ascites albumin gradient in chronic liver disease patients.Methods: This prospective observational study was done in 55 patients with chronic liver disease attending IPD of tertiary hospital. Based on investigation findings, patients were divided into two groups: Group A-Patients with sterile cirrhotic ascites, Group B- Patients with spontaneous bacterial peritonitis. Detailed history, examination and relevant investigation were done. Data was collected, recorded and statistical calculation was done using in Microsoft excel 2007.Results: Most common presenting symptoms of SBP patients were increasing ascites refractory to treatment (90%), followed by peripheral edema (80%). Jaundice and hepatic encephalopathy was found in 75% and 65% respectively. Serum and ascites albumin levels were lower in Group B (2.54±0.33 and 0.43±0.23 g/dl respectively) as compared to Group A (2.85±0.36 and 0.91±0.31 g/dl respectively) and it was statistically significant. The Mean±SD of SAAG for group A and group B was (1.94±0.36) and (2.09±0.47 g/dl) respectively. This difference was statistically not significant.Conclusions:Study conclude that the development of spontaneous bacterial peritonitis in chronic liver disease patients with sterile ascites is directly proportional to ascitic fluid albumin and serum albumin concentration whereas occurrence of SBP is not affected by variation in SAAG ratio if it is already higher than 1.1 g/dl.

Study of inflammatory markers for COVID-19 in control population and in pregnant women: a systematic review

COVID-19 infection is an inflammatory state and has varied presentation ranging from mild to severe condition. The second wave of COVID-19 resulted in greater mortality and morbidity as compared to first wave both in general as well as in pregnant patient. As the progression of disease is rapid and fatal hence there is a need of reviewing relevant inflammatory markers for predicting the disease course and severity. The inflammatory markers considered are Interleukins, CRP, LDH, serum Ferritin, Neutrophil/ lymphocyte ratio and in some cases serum Procalcitonin. These markers are raised in other inflammatory conditions also and therefore the maximum predictability of various markers differs in different conditions. COVID-19 in pregnancy in itself is challenging as it alters the immunity and hemodynamic and therefore the value of these markers in pregnancy can affect the sensitivity and specificity in predicting the severity of the disease. This review will evaluate the role of inflammatory markers in general population as well as pregnancy with regards to their prognostication in assessing the disease severity

Recent progress in molybdenum disulfide (MoS2) based flexible nanogenerators: an inclusive review

Energy consumption and structure have changed in the new era along with the growth of the Internet of Things (IoT) and artificial intelligence, and the power sources for billions of dispersed gadgets and sensors have sparked attention globally to protect the environment. Due to the rising usage of non-renewable energy sources and the resulting environmental damage, researchers are investigating alternative energy systems that can harness energy from the environment. Therefore, self-sufficient small-scale electronic systems will be possible through the use of underutilised natural waste energy sources collected in nanogenerators (NGs). The features of the materials used have a significant impact on how well NGs work. In this regard Molybdenum disulfide (MoS2), a 2D material, is one of the compounds that is discussed vastly nowadays due to its exceptional characteristics that made it useful in a variety of applications. Many research papers on the advancement and implementation of MoS2 materials have been published, but this article will give an in-depth overview. It offers an introduction and interpretation of the main properties of 2D MoS2 nanomaterials, starting with their current state, properties, and various synthesis processes. Later, the review concentrates on MoS2 applications and energy-harvesting capabilities and gives a comprehensive study of piezoelectric, triboelectric and thermometrical nanogenerators based on 2D MoS2 nanocomposite materials

Synthesis of Novel Bio-Composite Material for Functional Finishing of Cellulosic Textile Substrate

Development and useful utilization of materials from agricultural wastes and biomass feedstock for the textile-finishing industry is of great significance to the research community worldwide. In this work, a sustainable and green chitosan and waste onion peel extract (CS-OS) composite material is prepared by the co-precipitation method and applied onto cotton fabrics for the development of antibacterial and radical-scavenging textiles. The composite was loaded onto cotton with and without citric acid as a cross-linker to obtain final textile substrate with durable functions. The composite formation and the coated cotton fabrics were examined using SEM, FT-IR, and TGA techniques. Antioxidant activity of the finished fabrics was evaluated using the DPPH assay, and antibacterial tests were performed using the colony counting method. The results revealed that composite-treated cotton showed good radical-scavenging and antibacterial activities. It was found that citric acid-cross-linked cotton fabrics displayed enhanced antibacterial and antioxidant properties

Morphology of functioning trabeculectomy blebs using anterior segment optical coherence tomography

Purpose: To image trabeculectomy blebs using anterior segment optical coherence tomography (AS-OCT), and to correlate the bleb morphologic features at one month postoperatively with bleb function at six months. Materials and Methods: This prospective, observational study included 56 eyes undergoing trabeculectomy with MMC, followed up for minimum of six months. Postoperatively, bleb imaging was done using AS-OCT at one and six month. Bleb morphology was assessed for bleb wall reflectivity, bleb pattern in multiform reflectivity, visibility of drainage route and presence of hyper-reflectivity area. Bleb function was considered successful if IOP was <18 mmHg without medication at six month. Bleb morphology one month postoperatively was correlated with bleb function at six months. Results: At six months successful bleb function was noted in 44 (81.5%) eyes. Morphology of bleb at one month showed uniform bleb wall reflectivity in 6 eyes (11%) and multiform wall reflectivity in 48 eyes (89%). In eyes with multiform wall reflectivity, microcysts with multiple layers was seen in 26 eyes (48%), microcysts with subconjunctival separation in 12 eyes (22%) and only microcyst in 10 eyes (19%). When bleb features at one month were correlated with the bleb function at six months, logistic regression analysis revealed that blebs with multiform reflectivity with multiple internal layers with microcysts were associated with higher chances of success (P < 0.001). Conclusion : AS-OCT demonstrated early bleb morphological features that may be used to predict the functioning of a bleb. Multiform bleb wall reflectivity with a pattern of multiple internal layers and microcysts was associated with increased chances of success of a bleb