Böcker av Rachna Sharma

Underwater wireless communication system designers have been confronted with an ever-increasing need for high-capacity and high-data-rate wireless applications for real-time image and video transmission. Acoustic wireless communication (AWC) has been preferred inside the water over a long-range communication (a few kms). However, due to having a drawback of low data rate (upto kbps) in AWC, the visible light communication (VLC) is growing attention as an attractive alternative to AWC, as VLC supports high data rate. Di¿erent sorts of light transmissions, such as horizontal, vertical, and slant, are possible. When visible light travels through an underwater channel, it encounters a variety of negative factors due to the interaction of the light wave with underwater constituents. Path loss and turbulence are two of the most critical factors that cause severe fading. Path loss quanti¿es the amount of power a signal loses as it travels through a communication channel. Underwater turbulence occurs due to the change in refractive index of the water, thereby causing random ¿uctuations in the received signal strength. This phenomenon is referred as turbulence-induced fading. The main cause of change in refractive index is variation of temperature, eddy particles and pressure inside water. Since surface of the sea is directly imposed with sun rays and due to which the temperature of the surface water is higher as compared to the temperature of deeper dark water. Visible Light Communication refers to optical wireless communication systems that operate in the visible band (390 ¿ 750 nm). LEDs or lasers are used in VLC systems because they can be pulsed at very high speeds without äecting the lighting output or the human eye. The use of LEDs is a sustainable and energy- e¿cient strategy for both illumination and communication. The properties of sea water are transparent to blue and green light (450 nm to 530 nm) and exhibit low attenuation. Underwater VLC is able to provide data rate up to Gbps in a real-time environment. In the Underwater VLC system, spatial diversity has proven to be an e¿ective and widely used technique to alleviate the e¿ects of fading and improve the performance of communication systems. In spatial diversity, several parallel communication links are formed between transmitter and receiver by employing multiple transmit and/or receive branches (MIMO systems).

Sunderkand for Kids-revised version 2023 is a detailed explanation of a few important verses from Sunderkand, the fifth chapter of Ramcharitmanas written by Goswami Tulsidas ji. It is written in very simple language to make the messages accessible for young children. Sunderkand is not just a chapter in the story of Ramayan, rather it has hidden messages that can be very useful in day-to-day life. A historical Katha- a story that is simplified for children. This will help children to connect with the relevance the story of Ramayan.

Young children experience a wide range of emotions when presented withchallenges in their learning. These emotions, such as stress and anxiety, can lead to physical symptoms of distress yet these can be supportedproactively by having children explore appropriate strategies to copewith them. Magic PIE is our first book to help and guide children to usean effective breathing strategy as a tool when faced with overwhelmingemotions while in school.This book is intended to address the social-emotional-learning (S.E.L.) skillsin Mathematical Processes and has a direct connection with Ontario MathCurriculum. The SEL skills aim at helping students, identify and manageemotions, express and manage feelings, all while they engage positivelyin mathematics activities. On the other hand, these feelings and emotionscan be emerging in many other situations regardless of the subject area.Therefore, this book and the skills within have relevance in many differentareas in the day-to-day life of a child.Through this book, young minds may find connections to the situationsthat affect them, sensations that they feel as a result of anxieties andworries and the coping strategies that can be helpful to them.

As parents and teachers, we often try to fix the situations and circumstances our kids are in to avoid themgetting hurt, frustrated or disappointed. However, when kids are on their own on the playground, in aclassroom, or at a gathering, they may find themselves in challenging situations without you.The earlier our kids learn to analyze and reflect on their days and develop an understanding of lesspredictable situations, the better skills they'll have to navigate through their world. They must develop toolsand strategies to support themselves independently.Mindfulness is one immensely helpful tool that children can use to help themselves in difficult situations. It istruly a magic wand that one can use to create space between problems, and reactions to such problems.This book highlights valuable strategies such as positive affirmations, gratitude, mindful listening, kindness,empathy, positive thinking patterns, taking breaks, and deep breathing to deal with negative emotions andsituations. The book also highlights how mindfulness can add to your life and relationships in general.Triggering situations may vary day to day, but mindfulness remains a reliable tool that children can lean on.