A Survey on Graph Database Management Techniques for Huge Unstructured Data

Data analysis, data management, and big data play a major role in both social and business perspective, in the last decade. Nowadays, the graph database is the hottest and trending research topic. A graph database is preferred to deal with the dynamic and complex relationships in connected data and offer better results. Every data element is represented as a node. For example, in social media site, a person is represented as a node, and its properties name, age, likes, and dislikes, etc and the nodes are connected with the relationships via edges. Use of graph database is expected to be beneficial in business, and social networking sites that generate huge unstructured data as that Big Data requires proper and efficient computational techniques to handle with. This paper reviews the existing graph data computational techniques and the research work, to offer the future research line up in graph database management

Analysis of curtailment at The Geysers geothermal Field, California

Geothermal energy has traditionally been viewed as a baseload energy source, but the rapid growth of intermittent renewable energy has led to a need for more flexibility in power generation to avoid mandatory curtailment imposed by grid operators. This study of curtailment at The Geysers provides insights into the magnitude, duration, frequency, temporal and spatial distribution, and potential causes of curtailment events between 2013 and 2018. Annual levels of curtailment range during this period from 9 to 47 GW h, representing 0.15 to 0.81 % of the net generation. Most curtailments occurred at the power plants connected to a lower capacity transmission line and may result from transmission constriction. There is a clear link between negative pricing and economic curtailment, especially when solar production is higher. Economic curtailment events tend to be only a few hours and vary in magnitude up to almost 300 MW, whereas transmission-related curtailment events can be up to several weeks in duration. It is likely that curtailment of geothermal power will be an increasing concern, and could be mitigated by flexible generation strategies and increases in energy storage. It is critical to know the nature of curtailment events so that flexible generation options can be assessed properly

Structural, optical and nanomechanical properties of (1 1 1) oriented nanocrystalline ZnTe thin films

Structural, optical and nanomechanical properties of nanocrystalline Zinc Telluride (ZnTe) films of thickness upto 10 microns deposited at room temperature on borosilicate glass substrates are reported. X-ray diffraction patterns reveal that the films were preferentially oriented along the (1 1 1) direction. The maximum refractive index of the films was 2.74 at a wavelength of 2000 nm. The optical band gap showed strong thickness dependence. The average film hardness and Young’s modulus obtained from loaddisplacement curves and analyzed by Oliver-Pharr method were 4 and 70 GPa respectively. Hardness of (1 1 1) oriented ZnTe thin films exhibited almost 5 times higher value than bulk. The studies show clearly that the hardness increases with decreasing indentation size, for indents between 30 and 300 nm in depth indicating the existence of indentation size effect. The coefficient of friction for these films as obtained from the nanoscratch test was ∼0.4.Financial support in the form of fellowships to MSRNK and SK from the ACRHEM project of DRDO is acknowledged

Comparison of different brands of centrally acting skeletal muscle relaxants: a cost analysis study

Background: Skeletal muscle relaxants are structurally distinct drugs prescribed for reducing muscle spasms, pain, and hyperreflexia. Centrally acting skeletal muscle relaxants are manufactured by various pharmaceutical companies with variable price. The present study, aimed to analyze the cost variation of various brands of centrally acting skeletal muscle relaxants, so as to help the physician to choose the cost effective treatment.Methods: Current index of medical stores (CIMS) April 2018 and online literature were used as information guide to review the prices of drugs used in the treatment of musculo skeletal pain and spastic neurological disorders.Results: Among anti spasmodic group, thiocolchicoside 4 mg shows maximum price variation of 337.5%, whereas carisoprodol 350 mg shows the least variation of 0.1%. It is evident from antispastic group that baclofen 10 mg shows maximum price variation of 93.91% and 5 mg of Baclofen shows the least variation of 11.22%. It is observed that, among anti spastic group, a percentage prize variation of 93.91 for 10 mg and 11.22 for 5 mg baclofen. Largest % prize variation is seen in metaxalone + diclofenac sodium (400+50) mg as 525% and the least variation is observed in tolperisone+ paracetamol (150+325) mg as 3.88%.Conclusions: Centrally acting orally effective skeletal muscle relaxants are commonly prescribed for painful musculoskeletal and spastic neurological disorders. Physicians should give due importance for the cost of the drugs while selecting appropriate drug for musculo skeletal disorders