Design and implementation of a communication network and operating system for an adaptive integrated hybrid AC/DC microgrid module

This paper proposes an adaptive integrated hybrid AC/DC microgrid module to accommodate a wide range of distributed renewable energy resources (DRERs), distributed energy storage devices (DESDs) and distributed demand resources (DDRs) into the existing distribution systems. This microgrid module is designed to be portable, scalable, easy to deploy, and simple to operate. The modeling of the proposed microgrid module, based on the IEC 61850 standard, is presented. A novel logical node is introduced, which describes functionalities of the bidirectional interlinking converter (BIC) interfacing AC sub-grid and DC sub-grid in a better way. To achieve the target of plug-and-play functionalities, specific microgrid module communication network (MMCN) and microgrid module operating systems (MMOS) are designed and implemented in the hardware prototype built in the laboratory. Experimental results obtained from the lab prototype clearly validate the effectiveness of the proposed design of the microgrid module, communication network and operating system.Published versio

REV Technology

Abstract—REV technology uses the mechanism of Reverse Electro Vibration, hence the name REV. It is an augmented reality technology. Augmented Reality has come along a long way. Many innovations have been made in this field. But most of these are restricted to a particular type of usage since they make use of actuators, which are mechanisms for controlling the environment. REV, on the other hand, is a tactile technology which gives the user an enhanced touch of real world objects by augmenting them with virtual tactile sensations using a device which the user will wear. It bridges the gap between the real and virtual world. According to this, we inject a weak electrical signal on the user’s body, which creates an electrical oscillating field around the user’s fingers. When the user slides his or her fingers around the object, the user experiences distinct textures after augmenting the physical object. The properties of the signal can be varied by programming to provide a wide range of tactile sensations. REV, thus, manipulates the user's tactile sensations and enhances the sense of touch

Role of Ultrasound in Evaluation of Nodular Thyroid Lesions

BACKGROUND AND PURPOSE: Thyroid disorders have become widely prevalent in India. Using latest sonography techniques,  evaluation of thyroid nodule and diagnosing as Malignant  without FNAC has risen to 90% specificity. MATERIAL AND METHODS: The study was done in  100 patients who came to sonography department with clinical suspicion of thyroid nodule. High frequency superficial ultrasound probe is used in this study. The ultrasound characteristics used in our  examination were echogenicity (hypoechoic /isoechoic /hyperechoic) , composition (solid /cystic /mixed /spongiform), margin, shape, echogenic foci as specified by ACR-TIRADS . RESULTS: In this study on 100 patients with thyroid nodules, 34 cases were classified as TIRADS 3, 4 or 5.  From this 30 patients underwent surgical resection of which 30  people had histopathological proved thyroid carcinoma meaning the accuracy of sonography with TIRADS has 90% specificity and 100% sensitivity in diagnosing Malignancy.  CONCLUSION: Ultrasonography with ACR TIRADS  scoring is very much helpful tool  in diagnosing Malignancy without FNAC is cost effective and easy available modality. In hands of a good sonologis