Mapana Journal of Sciences

Boltzmann Machines Associated Recommender System: A Review

Dheeraj Kumar Sahni, Dhiraj Khurana — Wed, 21 Sep 2022 00:00:00 +0000

Nowadays, the information on the internet presents explosive growth; similar information from the space of information available overwhelms users. Collaborative filtering is one of the alternatives used for solving this problem. Recommendations are the need of daily life to choose the better alternative from the given choices. Everyone uses recommendations to approach the good items and services in this interconnected world. The recommender system is a software solution to make this process easy. This article presents the application of Boltzmann machines in recommendation systems for the last twenty years.

Role of Defects in the Band Gap Tailoring of Carbon Black

Elma Elizaba Mathew, Manoj Balachandran — Wed, 21 Sep 2022 00:00:00 +0000

With the rise in the need for cost-effective production of graphene-like systems, Carbon Black (CB) is found to be a potential candidate. This report presents the structural modification of Carbon Black (CB) subjected to hydrothermal exfoliation at various temperatures. X-ray diffraction (XRD) revealed the graphitic structure with a broad peak, indicating the amorphous nature regardless of the variation in temperatures. Raman spectroscopy revealed that defect intensity increased with the increase in temperature. The band-gaps are found to be 4eV, 2.95eV, 2.86eV and 2.21eV at the exfoliation temperatures 160⁰C,180⁰C,200⁰C and 220⁰C respectively exhibiting a lowering with rise in temperature.

A Novel and Sustainable Method for the Synthesis of 2-chloro-3-[trans-4-(4-chlorophenyl) cyclohexyl]-1,4-naphthoquinone, accomplished by systematic process development studies - Trans-Cl synthesis

Wed, 21 Sep 2022 00:00:00 +0000

Present work reports a novel and commercially viable method for the synthesis of 2-chloro-3-[trans-4-(4-chlorophenyl) cyclohexyl]-1,4-naphthoquinone 1, a renowned intermediate of Atovaquone (an antimalarial drug). Majority of the prior arts disclose the synthesis of this intermediate from the expensive starting material 2-chloro-1,4-naphthoquinone 2, in relatively low yield. In this regard, it was considered worthwhile to synthesize 1 by a novel route using cheaper starting material 2,3-dichloro-1,4-naphtoquinone 5, in high yield and purity. In the present study, emphasis was given for selecting the reagents and solvents, optimizing the reaction conditions, recovery and reuse of solvents and silver salt. This optimized novel process is cost effective and would generate less effluent.

Lossy & Lossless Capacitance Multipliers: A Series of Realization Using VDTAs & Single Grounded Capacitor

Tapas Kumar Paul, Suvajit Roy, Radha Raman Pal — Wed, 21 Sep 2022 00:00:00 +0000

The article presents new realizations of capacitance multiplier circuits, employing two voltage differencing transconductance amplifiers (VDTAs) and one capacitor without any passive resistors. The equivalent capacitance value of the proposed capacitance simulators can be achieved electronically by regulating the DC bias currents of VDTAs. All the proposed realizations do not require any critical component matching conditions. The lossless floating negative capacitor multiplier (NCM) circuit is studied in detail. The capacitive cancellation scheme and a quadrature sinusoidal oscillator circuit are included to demonstrate the effectiveness of the circuit. The effect of the VDTA non-idealities and parasitic on the realized circuits is analysed. SPICE simulation results using TSMC 0.18 μm CMOS technology parameters are presented to reflect the workability of the proposed NCM.

Drug Usage Analysis by VADER Sentiment Analysis on Leading Countries

Sandipan Biswas, Shivnath Ghosh — Wed, 21 Sep 2022 00:00:00 +0000

In Twitter people from all part of the planet will build their opinions and take feed from the opinions which produces around five hundred million of tweets daily that amounts regarding 8TB of information. Data which are scrapped from Twitter may be helpful if analyzed as we are able to extract vital information via sentiment analysis. Opinions or comments regarding any news or launch of a product of quite trend may be ascertained well in twitter information. Our aim is to analysis of tweets on use of drugs for the treatment of COVID-19 diseases. In twitter sentiment analysis, we have a tendency to categorize those tweets into positive and negative sentiment and cluster along or a pack of cluster. We have conducted a study and locate that the application will quickly and efficiently distinguish numerous tweets on the idea of their sentiment scores and proportion and may notice weak and powerful positive or negative tweets once clustered with results of various dictionaries and establish a powerful support on our assumption. This paper surveys the polarity activity exploitation using VADER sentiment analysis on the utilization of drug for of COVID-19 treatment.