Disseminating knowledge resources through Weblogs

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Resource sharing protocol Z39.50: A Bird's Eye View

This article discusses the Z39.50 protocol, its genesis, development and structure. It highlights the basic functions with diagrammatic representation. Briefly describes about record syntaxes and definition. The paper also discusses the advantages and disadvantages of this protocol

Review on conductivity enhancement in n-ZnO/p-Si heterojunction diodes with the influence of Rare earth ions as donor impurities.

Nanoelectronics is an emerging field of nanotechnology where innumerable nanomaterials are used to fabricate electronic devices like LEDs, Photodiodes, Transistors, FETs, UJTs, SCRs, Laser diodes, etc.  The accomplishment of high-efficiency electronic devices at low cost tends to be the foremost challenging task in the field of nanoelectronics. The p-n heterojunction is a junction of two dissimilar p and n-type crystalline materials with different bandgap energies, work functions and electron affinities.The n-ZnO/p-Si heterojunction device tends to be cost-effective and also potential candidates for integration with microelectronic based photonic and optoelectronic devices. Th electrical properties of n-ZnO/p-Si heterojunction diode can be fine-tuned by the addition of dopants at different concentrations.This article presents a brief overview on the influence of different  rare earth dopants on chargecarrier enhancement and transport mechanism in n-ZnO/p-Si heterojunction diode. This review paper also presents an outline on heterojunction formation theories and applications of n-ZnO/p-Si heterojunction diod

Enhancing Load-Carrying Capacity of Reinforced Concrete Columns with High Aspect Ratio Using Textile-Reinforced Mortar Systems

This research investigates the effectiveness of textile-reinforced mortar (TRM) systems for enhancing the load-carrying capacity of reinforced concrete columns (RCCs) with high aspect ratio. This study focuses on the use of the TRM systems as an alternative to fiber-reinforced polymer (FRP) systems, addressing challenges such as high cost, poor performance at high temperatures, incompatibility with substrate materials, and inability to be applied to damp surfaces. It includes a detailed analysis of the TRM systems’ effectiveness through an experimental evaluation, with a particular focus on RCCs having high aspect ratio. The obtained results reveal a significant strength improvement, ranging from 50% to 129%, for RCCs with the aspect ratios decreasing from three to two, with the workmanship contributing to the observed strength enhancement. Achieving a consistent and uniform distribution of the mortar layer, seamlessly aligned with the column surfaces, proves crucial. The study also highlights the importance of the mortar layer thickness, particularly in cases of the reduced aspect ratios. An enhancement of the load-carrying capacity ranges from 3.65% to 8.53%, for the reduction in the aspect ratio from 5 to 4.16 and 3.24, respectively. The confined specimens display varying peak axial strains, exhibiting commendable elastic–plastic behavior with non-linear ascending curves

Initiation of piezoelectricity expands the photocatalytic H2 production and decomposition of organic dye through g-C3N4/Ag/ZnO tri-components

The enhancement of photocatalytic reactivity through the internal electric field has received much attention. The combination of the piezoelectric effect and the photo-exiting process facilitates the segregation of the photogenerated carriers, thereby boosting the piezo-photocatalytic activity. We have constructed g-C3N4/Ag/ZnO tri-component composites; with various g-C3N4 precursors to achieve reliable photo/piezo-photocatalysis for H2 production and Rhodamine B (RhB) dye degradation. We observed that urea-based g-C3N4/Ag/ZnO (UCAZ) tri-components exhibit a superior H2 production rate of 1125.5 μmol h−1 g−1 under photocatalytic conditions. When piezoelectric-potential was introduced into the photocatalysis reaction via ultrasonic, the H2 rate increased dramatically to 1637.5 μmol h−1 g−1, which is approximately 145% greater than that light irradiation alone.Similarly, the catalytic decomposition ratio of Rhodamine B (RhB) under the coexistence of ultrasound and light, and degradation efficiency reached 99% in 120 min, which is higher than the value of (42%, 0.0031 min−1) for piezo-catalysis and (80%, 0.01 min−1) for photocatalysis condition alone. The rate constant under synergistic simulation reaches 0.021 min−1, which is 200% and 645% times higher than the sole light and ultrasonic illumination. Additionally, RhB degradation of all the tri-components was performed under solar light (Sunlight) and ultrasound irradiation, and efficiency reached 99.5% in 45 min with a rate constant of 0.06 min−1, which is 300% higher than the piezo-photocatalytic under LED source. The enhanced performance of the g-C3N4/Ag/ZnO tricomponent is attributed to the high specific surface area (168 m2 g−1) and synergetic effect of piezo catalysis and photocatalysis

An Analysis on Various Ballast Water Treatment Techniques for ORV Sagar Nidhi

2042-2052<span style="font-size:9.0pt;font-family: " times="" new="" roman";mso-fareast-font-family:calibri;mso-bidi-font-family:"times="" roman";="" mso-ansi-language:en-us;mso-fareast-language:en-us;mso-bidi-language:ar-sa"="" lang="EN-US">Discharge of ballast water from ship is a major source of introduction of non-indigenous species to marine, estuarine, and freshwater ecosystems. Ships carry ballast water to have stability and maneuverability during voyage.Transport of ballast water across the globe playsa majorrole in ecological imbalance as it carries organisms from oceanic to shallow areas, where they may start a new invasion. In 2004, the International Maritime Organization (IMO) initiated regulatory measures to minimize the species shift by adopting the International convention for the control and management of ship’s ballast water and sediments. Since then, vessels have been increasingly practicing ballast water exchanges. To keep up with IMO requirements and also the stricter requirements stipulated by few ports around the world, ships need to have effective ballast water treatment system. An analysis is carried-out to optimize the selection of ballast treatment system for ORV Sagar Nidhi among the number of existing systems based on their compatibility and suitability.Sagar Nidhi is a state of art ice class ocean research vessel (ORV) of the National Institute of Ocean Technology (NIOT), carrying research at both Indian and Antarctic waters. Such vessels have limited options for treating ballast water, since a few treatment systems are designed specifically for their needs. Efficacy, residual toxicity, size, weight, electrical load requirement, and safety were the parameters considered while evaluating a ballast water system for Sager Nidhi. As a result of optimization, a<span style="mso-bidi-font-weight: bold"> ballast water treatment system with filtration and ultra violet treatment was chosen.</span