National Institute of Technology, Meghalaya

About: National Institute of Technology, Meghalaya is a education organization based out in Shillong, India. It is known for research contribution in the topics: Control theory & Computer science. The organization has 503 authors who have published 1062 publications receiving 6818 citations. The organization is also known as: NIT Meghalaya & NITM.

A Reduced Device Count Single DC Hybrid Switched-Capacitor Self-Balanced Inverter

Abstract: Multilevel inverter (MLI) with switched-capacitor combinations have attained lots of attention for reducing the switch count, source count and control complexity. This brief discloses a cross-switched hybrid 13-level inverter (CHI) topology consisting of switched-capacitor circuits. The proposed CHI includes a single-dc source and only 12 switches to generate the 13-level triple voltage boost output. The desired output voltage levels are realized by self-balanced operation of the capacitors. The voltage across two capacitors is inherently maintained at input dc voltage ( ${V}_{in}$ ) and other two capacitors are self-charged to 0.5 ${V}_{in}$ , which reduces the control complexity. Comparative assessment with prior-art MLIs indicates the merits such as fewer devices and low voltage stress of proposed CHI. To ascertain the operational principles simulation and experimental results are finally acquired under several steady and dynamic conditions.

Mechanochemical Synthesis of Olanzapine Salts and Their Hydration Stability Study Using Powder X-ray Diffraction

Abstract: A series of olanzapine (OLN) dicarboxylic acid salts including earlier reports on olanzapinium malonate (1:1) and maleate (1:1 and 1:2) were prepared mechanochemically using liquid assisted grinding (LAG) in order to study their hydration stability. Powder X-ray diffraction was used as a characterization tool during the investigation. On the basis of the single crystal structures of respective OLN salts, a negative correlation between the dicarboxylic acid chain length and the hydration stability of the corresponding OLN salt was found. Our observations suggest that the overall crystal packing, beyond the stronger hydrogen bond synthon (N+–H···O– in OLN salts compared to O–H···N in OLN hydrates) plays an important role in designing OLN salts with better hydration stability. In addition, melting point analysis showed that OLN dicarboxylic acid salts follow melting point alteration behavior similar to the pure diacids.