Dieses Buch wendet sich an Studierende der Elektrotechnik sowie an Praktiker, die numerische Probleme der Netzwerkana- lyse schnell und einfach auf Basic-Rechnern loesen wollen, ohne selbst Programme schreiben zu mussen. Vorangestellt ist ein Kapitel mit den wesentlichen Formeln und Methoden der Netzwerkanalyse. Es dient z" Cd sehen Infor- mation fur das Studium und die Prufungsv0cbereitung und ist hilfreich fur Leser, die bei der Lekture der Programme und der ubungsaufgaben auf theoretische Schwierigkeiten stossen. Fur die Netzwerkanalyse braucht man nur wenige, aber univer- selle Programme. Hier werden vier leistungsfahige Standard- programme beschrieben. Ihre vielfaltigen Anwendungsmoeglich- keiten werden an zahlreichen UEbungsaufgaben demonstriert. Die UEbungsaufgaben behandeln alle wichtigen Fragestellungen der Netzwerkanalyse und koennen zur Klausurvorbereitung dienen. Fur elementare Netzwerkberechnungen ist ein Programm gedacht, das Kettenrechnungen in komplexer Arithmetik in einfacher Weise auszufuhren gestattet. Groessere Probleme werden haufig mit dem Maschenstrom- oder dem Knotenpunktpotentialverfahren geloest. Diese fuhren auf kom- plexe symmetrische lineare Gleichungssysteme, die mit dem komplexen Gauss-Algorithmus aufgeloest werden. Hierfur ist ein Programm vorgesehen, das die Symmetrie des Gleichungssystems ausnutzt, um die Eingabe zu vereinfachen, Speicher zu sparen und die Rechenzeit zu verkurzen. Der Benutzer muss allerdings das Gleichungssystem selbst aufstellen.

The IoT developer's complete guide to building powerful dashboards, analyzing data, and integrating with other platforms Key Features Connect devices, store and manage data, and build powerful data visualizations Integrate Grafana with other systems, such as Prometheus, OpenSearch, and LibreNMS Learn about message brokers and data forwarders to send data from sensors and systems to different platforms Book DescriptionGrafana is a powerful open source software that helps you to visualize and analyze data gathered from various sources. It allows you to share valuable information through unclouded dashboards, run analytics, and send notifications. Building IoT Visualizations Using Grafana offers how-to procedures, useful resources, and advice that will help you to implement IoT solutions with confidence. You'll begin by installing and configuring Grafana according to your needs. Next, you'll acquire the skills needed to implement your own IoT system using communication brokers, databases, and metric management systems, as well as integrate everything with Grafana. You'll learn to collect data from IoT devices and store it in databases, as well as discover how to connect databases to Grafana, make queries, and build insightful dashboards. Finally, the book will help you implement analytics for visualizing data, performing automation, and delivering notifications. By the end of this Grafana book, you'll be able to build insightful dashboards, perform analytics, and deliver notifications that apply to IoT and IT systems. What you will learn Install and configure Grafana in different types of environments Enable communication between your IoT devices using different protocols Build data sources by ingesting data from IoT devices Gather data from Grafana using different types of data sources Build actionable insights using plugins and analytics Deliver notifications across several communication channels Integrate Grafana with other platforms Who this book is forThis book is for IoT developers who want to build powerful visualizations and analytics for their projects and products. Technicians from the embedded world looking to learn how to build systems and platforms using open source software will also benefit from this book. If you have an interest in technology, IoT, open source, and related subjects then this book is for you. Basic knowledge of administration tasks on Linux-based systems, IP networks and network services, protocols, ports, and related topics will help you make the most out of this book.

Get to grips with building reliable, scalable, and maintainable database solutions for enterprises and production databases Key Features Implement PostgreSQL 13 features to perform end-to-end modern database management Design, manage, and build enterprise database solutions using a unique recipe-based approach Solve common and not-so-common challenges faced while working to achieve optimal database performance Book DescriptionPostgreSQL has become the most advanced open source database on the market. This book follows a step-by-step approach, guiding you effectively in deploying PostgreSQL in production environments. The book starts with an introduction to PostgreSQL and its architecture. You'll cover common and not-so-common challenges faced while designing and managing the database. Next, the book focuses on backup and recovery strategies to ensure your database is steady and achieves optimal performance. Throughout the book, you'll address key challenges such as maintaining reliability, data integrity, a fault-tolerant environment, a robust feature set, extensibility, consistency, and authentication. Moving ahead, you'll learn how to manage a PostgreSQL cluster and explore replication features for high availability. Later chapters will assist you in building a secure PostgreSQL server, along with covering recipes for encrypting data in motion and data at rest. Finally, you'll not only discover how to tune your database for optimal performance but also understand ways to monitor and manage maintenance activities, before learning how to perform PostgreSQL upgrades during downtime. By the end of this book, you'll be well-versed with the essential PostgreSQL 13 features to build enterprise relational databases. What you will learn Understand logical and physical backups in Postgres Demonstrate the different types of replication methods possible with PostgreSQL today Set up a high availability cluster that provides seamless automatic failover for applications Secure a PostgreSQL encryption through authentication, authorization, and auditing Analyze the live and historic activity of a PostgreSQL server Understand how to monitor critical services in Postgres 13 Manage maintenance activities and performance tuning of a PostgreSQL cluster Who this book is forThis PostgreSQL book is for database architects, database developers and administrators, or anyone who wants to become well-versed with PostgreSQL 13 features to plan, manage, and design efficient database solutions. Prior experience with the PostgreSQL database and SQL language is expected.

Get familiar with all the concepts related to Raspberry Pi and MQTT, build innovative IoT projects, and discover how to scale these projects to the next level Key Features Learn some of the most popular tools used in IoT - Raspberry Pi, MQTT, ESP8266 and more Build exciting projects such as an IoT weather station and a smart switch board Discover the advantages of taking your MQTT broker global Book DescriptionThe future of IoT has the potential to be limitless. Wouldn't it be great if you could add it to your own technological stacks? But where to start? With the basics, of course. In this book, you will start by learning about the most popular hardware and communication protocol, Raspberry Pi and MQTT. You will see how to use them together by setting up your own MQTT server on Raspberry Pi and understand how it works. This book explores MQTT in detail, including the clients and devices that you can connect to your server. You will discover two very popular IoT development boards among project developers: the ESP8266 and ESP32 development boards. Then, you will learn how to build interactive dashboards on your Pi and monitor your client devices. The book also shows you how to build a dashboard using another popular software - Node-RED. You will be able to put your skills to the test by creating two full-scale projects. That's not all: you will also learn how to host your own MQTT server on a virtual cloud service. Finally, you will be guided on how to move forward from here, what technologies to learn, and some project recommendations to polish or test your knowledge. By the end of this book, you will be able to build meaningful projects using Raspberry Pi and MQTT and create dashboards for your projects on Node-RED. What you will learn Configure and use a Raspberry Pi for IoT projects Implement the MQTT communication protocol for projects Understand how to set up the NodeMCU and ESP32 boards as MQTT clients Control a NodeMCU board through a Node-RED dashboard hosted on Raspberry Pi Get LAMP server, Home Assistant, and MariaDB on the Raspberry Pi Set up an online MQTT broker on a cloud service or enterprise service provider platform Build full-scale, end-to-end prototype projects Who this book is forThis book is for students who are interested in IoT and want to build projects using the available developer hardware. Educators who want to introduce a course on IoT into their curriculum, technology enthusiasts, and IoT developers who are just getting started will also benefit from this book. No prior knowledge about the two main topics that the book covers is required - Raspberry Pi and MQTT. A basic understanding of what IoT is will also be useful but not mandatory.

Learn how to pentest your hardware with the most common attract techniques and patterns Key Features Explore various pentesting tools and techniques to secure your hardware infrastructure Protect your hardware by finding potential entry points like glitches Find the best practices for securely designing your products Book DescriptionIf you're looking for hands-on introduction to pentesting that delivers, then Practical Hardware Pentesting is for you. This book will help you plan attacks, hack your embedded devices, and secure the hardware infrastructure. Throughout the book, you will see how a specific device works, explore the functional and security aspects, and learn how a system senses and communicates with the outside world. You'll set up a lab from scratch and then gradually work towards an advanced hardware lab-but you'll still be able to follow along with a basic setup. As you progress, you'll get to grips with the global architecture of an embedded system and sniff on-board traffic, learn how to identify and formalize threats to the embedded system, and understand its relationship with its ecosystem. You'll discover how to analyze your hardware and locate its possible system vulnerabilities before going on to explore firmware dumping, analysis, and exploitation. The reverse engineering chapter will get you thinking from an attacker point of view; you'll understand how devices are attacked, how they are compromised, and how you can harden a device against the most common hardware attack vectors. By the end of this book, you will be well-versed with security best practices and understand how they can be implemented to secure your hardware. What you will learn Perform an embedded system test and identify security critical functionalities Locate critical security components and buses and learn how to attack them Discover how to dump and modify stored information Understand and exploit the relationship between the firmware and hardware Identify and attack the security functions supported by the functional blocks of the device Develop an attack lab to support advanced device analysis and attacks Who this book is forIf you're a researcher or a security professional who wants a comprehensive introduction into hardware security assessment, then this book is for you. Electrical engineers who want to understand the vulnerabilities of their devices and design them with security in mind will also find this book useful. You won't need any prior knowledge with hardware pentensting before you get started; everything you need is in the chapters.

Get to grips with key IoT aspects along with modern trends, architectures, and technologies that support IoT solutions, such as cloud computing, modern app architecture paradigms, and data analytics Key Features Understand the big picture of designing production-grade IoT solutions from an industry expert Get up and running with the development and designing aspects of the Internet of Things Solve business problems specific to your domain using different IoT platforms and technologies Book DescriptionWith the rising demand for and recent enhancements in IoT, a developer with sound knowledge of IoT is the need of the hour. This book will help you design, build, and operate large-scale E2E IoT solutions to transform your business and products, increase revenue, and reduce operational costs. Starting with an overview of how IoT technologies can help you solve your business problems, this book will be a useful guide to helping you implement end-to-end IoT solution architecture. You'll learn to select IoT devices; real-time operating systems; IoT Edge covering Edge location, software, and hardware; and the best IoT connectivity for your IoT solution. As you progress, you'll work with IoT device management, IoT data analytics, IoT platforms, and put these components to work as part of your IoT solution. You'll also be able to build IoT backend cloud from scratch by leveraging the modern app architecture paradigms and cloud-native technologies such as containers and microservices. Finally, you'll discover best practices for different operational excellence pillars, including high availability, resiliency, reliability, security, cost optimization, and high performance, which should be applied for large-scale production-grade IoT solutions. By the end of this IoT book, you'll be confident in designing, building, and operating IoT solutions. What you will learn Understand the detailed anatomy of IoT solutions and explore their building blocks Explore IoT connectivity options and protocols used in designing IoT solutions Understand the value of IoT platforms in building IoT solutions Explore real-time operating systems used in microcontrollers Automate device administration tasks with IoT device management Master different architecture paradigms and decisions in IoT solutions Build and gain insights from IoT analytics solutions Get an overview of IoT solution operational excellence pillars Who this book is forThis book is for E2E solution architects, systems and technical architects, and IoT developers looking to design, build, and operate E2E IoT applications and solutions. Basic knowledge of cloud computing, software engineering, and distributed system design will help you get the most out of this book.

Mit der programmgesteuerten Rechenanlage (Ziffern-Rechenautomat) ist vor etwa zwanzig Jahren ein Maschinentyp auf den Plan getreten, der Leistungen zu voll bringen imstande ist, die bis dahin der menschlichen Geistestatigkeit vorbehalten waren. Zu der Kraft-Maschine, welche menschliche Muskelkraft ersetzt, kam die Informations-Maschine *) hinzu, welche logisch erfaBbare Tatigkeiten der mensch lichen Ratio ausfiihren und somit den Menschen auf einer hoheren, der geistigen, Ebene entlasten kann. 1m Zuge der Entwicklung hat sich die programmgesteuerte Rechenanlage, der Prototyp der InformationsmaschiI'l'2, ein viel groBeres Anwendungsfeld erschlossen, als es durch die Interessen der Mathematiker gekennzeichnet ist. Andere Maschinentypen sind hinzugekommen, auf welche die Bezeichnung Rechen Automat nurmehr bedingt paBt, die aber andererseits Anspruch haben, ebenbiirtig an deren Seite gestellt zu werden. Dabei denkt man zum Beispiel an die tech nischen Modelle zur Beschreibung von Lernvorgangen, an Spezialzweckanlagen zur Datenverarbeitung, Spracheniibersetzung, logischen Beweisfiihrung, zur Aus fiihrung von Strategiespielen usw. In Anbetracht der Vielfalt der Interessen er scheint es nicht unbillig zu fragen, wo, an welcher Stelle im Gebaude der Natur und technischen Wissenschaften wir uns iiberhaupt befinden, ob eine einfache Interpretation des Sachverhalts iiberhaupt moglich ist, die uns ein Zurechtfinden erlaubt."

The Igth century was distinguished by the construction of machines with enormous power. During the last decade rapid progress has been made in the development of a completely different type of machine. These new machines, the electronic computers, are not built to generate power or to do mechanical work, but to perform logical operations and ca1culations. This new concept will have a profound influence on engineering, science, ami economy. In fact, the first effects of this development are already taking shape today. It is the purpose 01 this book to give a survey of the basic principles and applications of computers for the benefit of those who hitherto did not work with them, but who might have use for them in the future. The rapid progress of the engineering science has, naturally, led to a situation in which the practicing scientist and engineer cannot keep abreast of the progress in neighboring fields. The chapters of this book were prepared by distinguished experts in the field of computers for the non-expert who does not intend to become an expert, but W}: l0 wants Jo acquire a general understanding of the problems and solutions which he needs to effectively perform the work in his proper field. We address this book to the engineers and scientists who want to know the performance of computers, as weH as to the managers who are rnainly concerned with their econornic aspect.