B. K. Singh

Remote retail monitoring and stock assessment using mobile robots

This paper describes a Virtual Reality (VR) based system for automating data collection and surveying in a retail store using mobile robots. The manpower cost for surveying and monitoring the shelves in retail stores are high, because of which these activities are not repeated frequently causing reduced customer satisfaction and loss of revenue. Further, the accuracy of data collected may be improved by avoiding human related factors. We use a mobile robot platform with on-board cameras to monitor the shelves either autonomously or through tele-operation. A remote operator can control the robot from a console which shows a 3D of view of the store as well as, capture real images and videos of the store. The robot is designed to facilitate automatic detection of Out-of-Stock (OOS) situations. It would be possible for a single operator to control multiple robots placed at different stores thus optimizing the available resources. As the deployment of the proposed system does not require modifying existing infrastructure of the store, the cost of the entire solution is cheaper with shorter return-on-investment (ROI) period.

Role of the humic acid for sorption of radionuclides by synthesized titania

Abstract Present work reports on synthesis, characterization and application of titania powder (anatase) for sorption of 137Cs (monovalent), 133Ba (divalent) and 154Eu (trivalent) radionuclides in the presence and absence of humic acid (Aldrich). In order to obtain a detailed sorption behavior of all the three aforementioned radionuclides, a series of experiments were conducted with respect to effect of pH, humic acid (HA), and concentration of radionuclides. Sorption studies of 137Cs, 133Ba and 154Eu onto synthesized titania have been carried out over a wide range of pH scale varying from 3 to 11 in the presence and absence of Aldrich Humic acid (2 mg/L). Sorption of all the three radionuclides rises sharply with the pH of the suspension with saturation value of ∼ 70%, 80% and 85% respectively for monovalent, bivalent and trivalent radionuclides. Humic acid could not make any influence for sorption of 137Cs, but significantly altered with respect to 133Ba and 154Eu sorption. The sorption data at various concentrations were fitted with Freundlich isotherm model.

Stability-indicative HPLC determination of donepezil hydrochloride in tablet dosage form

Asimple, selective, precise and stability-indicative high-performance liquid chromatography (HPLC) method of analysis of donepezil hydrochloride in tablet dosage form has been developed and validated. The drug undergoes degradation under acidic, basic, peroxide, photochemical and thermal conditions. The method has been statistically validated for linearity, accuracy, precision, limit of detection, limit of quantitation, solution stability, and selectivity according to ICH recommendations. Due to its simplicity and accuracy, the method can be used for routine drug quality control.

Dosimetric Analysis of Physical and Enhanced Dynamic Wedge and Its Implication in 3D-Conformal Radiotherapy Planning

Background: Across the history of radiotherapy, wedges are generally used to modify the shape of isodose lines to achieve desired clinical dose coverage to the target and to reduce the hot spot as well. Aim: The main aim of this study was to analyse and compare the dosimetric properties of Varian’s physical and enhanced dynamic wedges, and their dosimetric impact on radiotherapy plan (3D-Conformal). Materials and Methods: All plans were generated and evaluated in Varian’s eclipse planning system. For comparing the isodose line alteration, the plans were prepared in water phantom with field of size 10 cmx 10 cm. Wedges of angle 15°, 30°, 45° and 60° were used for generating isodose lines in the current study. All wedge factors were measured in water phantom using FC65 farmer type chamber. Discussion: In the current study, the dosimetric characteristics of EDW and PW were analyzed and compared. For analyzing the impact of EDW and PW, 22 patients were taken into consideration, and 50 Gy dose was prescribed to PTV in 25 fractions. Conclusion: The analysis of EDW and PW shows slightly different dosimetric features. EDW gives better target’s coverage, less hyper dose and comparatively less MUs as compare to PW. Hence the use EDW in 3D-conformal radiotherapy plan is a prudent practice.

CCDC 1482048: Experimental Crystal Structure Determination

Related Article: Archana Pandey, Chandrabhan Verma, B. Singh, Eno E. Ebenso|2018|J.Mol.Struct.|1155|110|doi:10.1016/j.molstruc.2017.10.114

Study of multiply charged Argon-ions formed by decay of 2p-hole state under e-- Ar collision employing energy selected ion coincidence technique

Inner shell de-excitation of atoms and molecules give rise to rearrangement of internal electron distribution, for light atoms non-radiative and for heavier atoms radiative transition are dominant de-excitation mechanisms. Correlated many-particle dynamics in Columbic systems is one of today’s grand challenges in physics. Multi-ionization studies on atoms and molecules provide information on the correlation between the electrons and also on the dynamics of the ionization processes [1]. There are various applications of such study particularly in the field of atomic, molecular and optical (AMO) physics, atmospheric physics, plasma physics and many more fields.