Neeraj Kumar

This book covers theory and practical knowledge of Probabilistic data structures (PDS) and Blockchain (BC) concepts. It introduces the applicability of PDS in BC to technology practitioners and explains each PDS through code snippets and illustrative examples. Further, it provides references for the applications of PDS to BC along with implementation codes in python language for various PDS so that the readers can gain confidence using hands on experience. Organized into five sections, the book covers IoT technology, fundamental concepts of BC, PDS and algorithms used to estimate membership query, cardinality, similarity and frequency, usage of PDS in BC based IoT and so forth.

The deterioration of water quality and unavailability of drinkable water are pressing challenges worldwide. The removal of toxic organic and inorganic pollutants from water is vital for a clean environment, as a response to water scarcity. Adsorption-based water technologies are among the most widely used because of their high efficiency and low cost, without relying on a complex infrastructure. In recent years, carbon nanomaterials (CNMs), such as graphene and derivatives, carbon nanotubes, carbon nanofibers, nanoporous carbon, fullerenes, graphitic carbon nitride, and nanodiamonds have been extensively exploited as adsorbents due to their extraordinary surface properties, ease of modification, large surface area, controlled structural varieties, high chemical stability, porosity, low density, ease of regeneration, and reusability. This book provides a thorough overview of the state of the art in carbon nanomaterials as they are used for adsorption applications in water purifications, as well as addressing their toxicological challenges. This volume primarily explores the fundamentals of adsorption, its mechanical aspects, synthesis and properties of CNMs, and adsorption performances of CNMs and their nanocomposites with organic and inorganic materials. Structural engineering and activation processes produce materials with enhanced adsorptive properties and separation efficiencies. Furthermore, the formation of CNMs with 2D and 3D macro-and microstructures and high porosities is a potential approach to improve adsorption performances and extend CNM use at the industrial level. The book also addresses important issues regarding these adsorbents that potentially affect future research and industrial applications of carbon-based nanoadsorbents in water security.

December 13, 2001: Pak-based terrorists carry out an audacious attack on the Indian Parliament killing eight security personnel and a gardener; all five terrorists are killed in their gun-battle with policemen deployed at the citadel of Indian democracy; the case is solved and all accused arrested within 72 hours. December 16, 2012: a 23-year-old physiotherapist is brutally gang raped in a moving bus in Delhi; the case is cracked within five days despite the lack of initial leads; a head constable loses his life in the line of duty during riots that follow the dastardly crime. In Khaki Files, Neeraj Kumar, a former Delhi Police Commissioner revisits many such high profile police cases of his career -from investigation of one of the biggest lottery frauds in the country to foiled ISI attempt to kill Tarun Tejpal and Anirudh Behal of Tehalka-bringing to light numerous achievements of the country's police force, otherwise largely reviled and ridiculed.

This book is focused on fabrication of composite material with powder metallurgy. It also includes the hardness test for finding the mechanical properties & machining operation for getting optimize MRR. With the help of SEM, EDS and hardness test Micro structure and properties were investigated to know effect of sintering temperature and time composite materials. The micrographs of Cu-graphite reflect the clean interface and good compatibility between matrix and reinforcement. The result showed that Cu- SiC composite is having more uniform structure visualized after the sintering, everywhere reinforcement material located in base material. Machining of fabricated composite Cu-SiC is more easy compare than other because it is having more material removal rate (MRR). The results obtained by this research will be useful for various Manufacturing Industries and researchers working in this field.

The main aim of this book is to analyze the effect of utilization of butanol and ethanol on emissions, exhaust temperature, power and efficiency, taken in definite quantities in spark ignition engine with gasoline. Due to concerning shortage of fossil fuels and there harmful effects on environment and human life has lead the world to think about an effective alternative to these, So we will try to reduce all these emissions from the gasoline engines. It is imminent that the petroleum reserve will be finished soon if some alternative fuels does not at least partly replaces petrol and diesel. It should have satisfactory brake power, thermal efficiency, low polluting emissions and should be long lasting and economical. Government has mandated the use of gasoline-ethanol blends in many countries. The Results obtained by this research will be useful for various Automobiles Industries and researchers working in this field.

This story is about an extraordinary journey of an ordinary Indian Immigrant to the UK. He grew up in a middle-class Indian family, had troubled childhood, struggling working life, and failed relationships. Despite all personal and professional setbacks, his desperation to keep moving forward in life, hunger for success and persistent hard work takes him to the level of success that most people can only dream to achieve. It's an amazing story of hope, courage, perseverance and how an ordinary middle-class Indian boy builds a bridge between his dreams and reality, to become one of the richest tycoons in England.

The last decade has witnessed an unprecedented development and growth in global wireless communications systems, technologies and network "traffic" generated over network infrastructures. This book presents state-of-the-art energy-efficient techniques, designs and implementations that pertain to wireless communication networks such as cellular networks, wireless local area networks (WLANs) and wireless ad hoc networks (WAHNs) including mobile ad hoc networks (MANETs), and wireless sensor networks (WSNs) as they are deployed across the world to facilitate "always on" reliable high-speed wireless access from anywhere, at anytime to accommodate the new paradigm of the "Internet of Things" (IoT). The pervasive and exponential growth of Wi-Fi and the impact of bandwidth-intensive applications on the energy consumption of Wi-Fi-enabled devices are discussed along with energy harvesting as an advantageous option to power WAHNs. The book aims to serve as a useful reference for researchers, students, regulatory authorities, and educators.