A postpartum woman in her 40s, with a history of peripartum cardiomyopathy, developed neutropenic sepsis after caesarean section and hysterectomy for placenta previa. She presented high fever, respiratory distress, splenomegaly, along severe neutropenia (absolute neutrophil count <100 cells/mm³). Blood cultures showed coagulase-negative staphylococci, viral tests were positive cytomegalovirus (CMV). suspected complication haemophagocytic lymphohistiocytosis (HLH) following CMV infection was...

Hydriding and dehydriding properties of MgH2 - x wt. % NiMn9.3Al4.0Co14.1Fe3.6 (x = 10, 25, 50) nanocomposites have been investigated in present work. Doped alloy was prepared by arc melting method ball milled with to get nanocomposites. Onset temperature as low 180 °C observed for MgH2-50 wt% system which is 80°C lower than the as-milled giving 131.34 KJ/mol activation energy. Structural analysis shows tetragonal, orthorhombic monoclinic phases MgH2, Al60Mn11Ni4 Mg2NiH4. Morphology SEM were...

High power electron beam generation studies were carried out in a planar diode configuration to investigate the effect of accelerating gap, voltage, and anode-cathode materials on electrode plasma expansion. The voltage has been varied from 145–428 kV, whereas current density 208–2215 A/cm2 with 100 ns pulse duration. It was found that follow bipolar space-charge limited flow model. anode cathode expansion velocities calculated using perveance data. expands at 11 cm/μs for 34 mm gap velocity...

High power microwave (HPM) generation studies were carried out in KALI-5000 pulse system. The intense relativistic electron beam was utilized to generate HPMs using a coaxial virtual cathode oscillator. typical parameters 350 kV, 25 kA, and 100 ns, with few hundreds of ampere per centimeter square current density. Microwaves generated graphite polymer velvet at various diode voltage, current, accelerating gaps. A horn antenna setup detector attenuators used measure the power. It observed...

This paper presents the design and development of a repetitive Marx generator rated at 1 kJ, 300 kV, 12 kA, 10 Hz which is suitable to drive load directly. Bipolar charging scheme has been adopted get following: 1) faster rise time 2) relatively low voltage. The due reduced number spark gaps down six for in-series capacitors (0.15 μF 50 kV) six-stage bipolar-charging generator. Interstage inductive further enhances efficiency overall system as compared resistive charging. characterized by an...

Crop residue (CR) retention is one of the viable option for improving soil properties as well microbial community. Different enzymatic activity in used indicator biological health. Experiment was conducted to access crop and P fertilization on fluorescein diacetate (FDA) which an important vis-a-vis health soil. Maize-wheat cropping system third most after rice-wheat rice-rice India. @50% 75% significantly enhanced soil, irrespective sampling zone depth. FDA higher rhizospheric than...

The present investigation was carried out at Organic Research Farm, Department of Horticulture, Institute Agricultural Sciences, Bundelkhand University, Karguanji, Jhansi, Uttar Pradesh during the Kharif-2023 with a view to identify effects different combinations organic and inorganic fertilizers its role in growth, yield quality Okra variety Pusa A4. experiment laid Randomized block design 9 treatments 3 replications combination RDF application nutrition. Under this experiment, overall,...

Our research, titled "IoT-based Smart Waste Management System using Arduino," is driven by the primary goal of contributing to Swacch Bharat Abhiyan initiated our Honorable Prime Minister, Shri. Narendra Modi. Leveraging advancements in emerging technologies, we focused on implementing a smart system for waste management, specifically targeting bins and their contents. In employed Internet Things (IoT) principles develop fully functional model. The core working model an Arduino...

The most fundamental issues in virtual cathode oscillator (vircator)-based high-power microwave devices are efficiency improvement and oscillation frequency control. We present a study of the time-dependent behavior reflex-triode vircator for various anode-cathode (AK) gaps. typical electron-beam parameters were 200 kV, 4 kA, 300 ns, with current density few hundreds amperes per square centimeter. Time-dependent analysis is applied to output signal investigate time evolution emitted spectrum...

Relativistic electron beam generation studies have been carried out in LIA-400 system through explosive emission for various cathode materials. This paper presents the properties of different materials at peak diode voltages varying from 10 to 220 kV and current levels 0.5 2.2 kA a single pulse duration 160-180 ns. The used are graphite, stainless steel, red polymer velvet. perveance data calculated experimental waveforms compared with 1-D Child Langmuir formula obtain plasma expansion...

The present study describes the synthesis and preliminary characterization of a novel nanocrystalline AlCuCrFeMnWx (x = 0, 0.05, 0.1 0.5 mol) high entropy alloy (HEA) powders via mechanical alloying (MA). During MA, formation supersaturated solid solution with major BCC 1 2 phase minor FCC fraction in HEAs. average crystallite size all HEA powder samples after 20 h milling was less than nm as determined by using Debye–Scherrer formula. particle morphology composition HEAs were investigated...

The objective of VRNPR is to extract vehicle license plate information from number vehicles. As the traffic control and proprietor recognizable proof a significant issue in every country, it important develop such device that automatically detects those owners who violates rules drives fast [1]. There are many systems present but there challenging factor like accuracy extraction, speed vehicles, lightening condition, quality images [2]. In this paper, different methods emerging technologies...

The microstructure and mechanical properties of plasma sprayed nanostructured 2024Al alloy were investigated before after adding SiC particles on weathering steel (Cor-Ten A242) substrate. Mechanical alloying (MA) was used to synthesise the 2024Al–15 wt-%SiC composite powders. X-ray diffraction studies showed p embedment in Al matrix MA nanograins powder coatings. It found that porosity level coating reduced 2% hardness increased 3276 MPa. high adhesion strength coatings observed can be...

We present a study of the shot-to-shot variation in frequency reflex-triode virtual cathode oscillator with respect to peak diode voltage, current, impedance, and perveance. The typical electron-beam parameters were 185 kV, 7 kA, 300 ns, current density few hundreds amperes per square centimeter. one-way analysis variance was employed examine statistical correlation perveance emitted microwave frequency. It shown that dominant is statistically correlated only current. However, secondary not...

Guiding magnetic field plays a very important role in the efficient operation of relativistic backward-wave oscillator (RBWO). Generally, fields are made using solenoid coils extended behind cathode region to get desired beam-microwave interaction region. Large diameter anodes required generate electron beam with low radial velocity. This paper presents pulsed coil design which uniform extends just up and requires much lesser volume has be kept lower number turns. setup been tested for 18-A...

The importance of advanced high strength steel having with balanced ductility has led to immense researches all over the world for increasing weight ratio in different structural applications. results quenching and partitioning (QP) heat treatment process on a hot rolled medium carbon (0.3C–1.0Mn–0.4Si–0.6Cr–0.46Ni–0.26Mo) have been analyzed present investigation. Hardness, tensile yield show considerable improvement after process. Microstructural analyses by Optical, Scanning Transmission...

Multi-Gigawatt level High Power Microwave (HPM) generation is a very active area of research. Here we are presenting the design and experimental results uniform slow wave structure (SWS) based relativistic backward oscillator (RBWO) operating in S-band frequency. SWS designed by analytical methods verified with simulation results. A frequency selective resonant reflector reflects generated microwave forward direction. Complete simulated 3D Particle Cell (PIC) simulations. The expected HPM...

Intense electron beam generation studies were carried out in high power cylindrical diode to investigate the effect of accelerating gap and voltage on current. The has been varied from 130 356 kV, whereas current density 87 391 A/cm2 with 100 ns pulse duration. experimentally obtained compared Langmuir–Blodgett law. It was found that can be explained by a model anode cathode plasma expanding toward each other. However, do not follow bipolar space-charge limited flow model. also initially...

Abstract To study the effect of explosive field emission cathodes on high power microwave generation, experiments were conducted a reflex triode virtual cathode oscillator. Experimental results with made graphite, stainless steel nails, and carbon fiber (needle type) are presented. The have been performed at 1 kJ Marx generator (200 kV, 300 ns, 9 kA). experimentally obtained electron beam diode perveance has compared one-dimensional Child-Langmuir law. plasma expansion velocity calculated...