This book is written for anybody who is intensely curious about nature and motion. Have you ever asked: Why do people, animals, things, images and empty space move? The answer leads to many adventures, and this book presents one of the best of them: the search for a precise, unified and final description of all motion.

The wish to describe all motion is a large endeavour. Fortunately, this large endeavour can be structured in the simple diagram shown in Figure 1. The final and unified description of motion, the topic of this book, corresponds to the highest point in the diagram. Searching for this final and unified description is an old quest. In the following, I briefly summarize its history and then present an intriguing, though speculative solution to the riddle.

The search for the final, unified description of motion is a story of many surprises. For example, twentieth-century research has shown that there is a smallest distance in nature. Research has also shown that matter cannot be distinguished from empty space at those small distances. A last surprise dates from this century: particles and space are best described as made of strands, instead of little spheres or points. The present text explains how to reach these unexpected conclusions. In particular, quantum field theory, the standard model of particle physics, general relativity and cosmology are shown to follow from strands. The three gauge interactions, the three particle generations and the three dimensions of space turn out to be due to strands. In fact, all the open questions of twentieth-century physics about the foundations of motion, all the millennium issues, can be solved with the help of strands.

The strand model, as presented in this text, is an unexpected result from a threefold aim that I have pursued since 1990, in the five previous volumes of this series: to present the basics of motion in a way that is up to date, captivating and simple. In retrospect, the aim for maximum simplicity has been central in deducing this speculation. While the previous volumes introduced, in an entertaining way, the established parts of physics, this volume presents, in the same entertaining and playful way, a speculation about unification. Nothing in this volume is established knowledge – yet. The text is the original presentation of the topic.

The search for a final theory is one of the great adventures of life: it leads to the limits of thought. The search overthrows our thinking habits about nature. A change in thinking habits can produce fear, often hidden by anger. But by overcoming our fears we gain strength and serenity. Changing thinking habits thus requires courage, but it also produces intense and beautiful emotions. Enjoy them!

This book is written for anybody who is curious about nature and motion. Curiosity about how bodies, images and empty space move leads to many adventures. This volume presents the best adventures about the motion inside people, inside animals, and inside any other type of matter – from the largest stars to the smallest nuclei.

Motion inside bodies – dead or alive – is described by quantum theory. Quantum theory describes all motion with the quantum of action h, the smallest change observed in nature. Building on this basic idea, the text first shows how to describe life, death and pleasure. Then, the text explains the observations of chemistry, materials science, astrophysics and particle physics. In the structure of physics, these topics correspond to the three ‘quantum’ points in Figure 1. The story of motion inside living and non-living matter, from the coldest gases to the hottest stars, is told here in a way that is simple, up to date and captivating.

In order to be simple, the text focuses on concepts, while keeping mathematics to the necessary minimum. Understanding the concepts of physics is given precedence over using formulae in calculations. The whole text is within the reach of an undergraduate.

In order to be up to date, the text is enriched by the many gems – both theoretical and empirical – that are scattered throughout the scientific literature.

In order to be captivating, the text tries to startle the reader as much as possible. Read- ing a book on physics should be like going to a magic show. We watch, we are astonished, we do not believe our eyes, we think, and finally we understand the trick. When we look at nature, we often have the same experience. Indeed, every page presents at least one sur- prise that makes the reader think. Also numerous interesting challenges are proposed.

The motto of the text, die Menschen stärken, die Sachen klären, a famous statement by Hartmut von Hentig on pedagogy, translates as: ‘To fortify people, to clarify things.’ Clar- ifying things – and adhering only to the truth – requires courage, as changing the habits of thought produces fear, often hidden by anger. But by overcoming our fears we grow in strength. And we experience intense and beautiful emotions. All great adventures in life allow this, and exploring motion is one of them. Enjoy it!

This is a textbook for first year Computer Science. Algorithms and Data Structures With Applications to Graphics and Geometry.

This book is intended for those who have already learned to read Arabic but are still struggling with the basics of Arabic grammar. The book moves from the very simple to the very complex, and includes examples and exercises in each chapter to reinforce learning. The key to the exercises is found in the back of the book. The book is difficult to find, as it was published at the Defense Language Institute. A free non-searchable PDF version is available through this site, and a searchable PDF is also available for purchase.

American Government is designed to meet the scope and sequence requirements of the single-semester American government course. This title includes innovative features designed to enhance student learning, including Insider Perspective features and a Get Connected Module that shows students how they can get engaged in the political process. The book provides an important opportunity for students to learn the core concepts of American government and understand how those concepts apply to their lives and the world around them. American Government includes updated information on the 2016 presidential election.

This course covers American Government: the Constitution, the branches of government (Presidency, Congress, Judiciary) and how politics works: elections, voting, parties, campaigning, policy making. In addition weęll look at how the media, interest groups, public opinion polls and political self-identification (are you liberal or conservative, Democrat or Republican or something else?) impact politics and political choices. Weęll also cover the basics in economic, social and foreign policy and bring in current issues and show how they illustrate the process.

This course is a survey of American Literature from 1650 through 1820. It covers Early American and Puritan Literature, Enlightenment Literature, and Romantic Literature. It teaches in the context of American History and introduces the student to literary criticism and research.

Analytical chemistry spans nearly all areas of chemistry but involves the development of tools and methods to measure physical properties of substances and apply those techniques to the identification of their presence (qualitative analysis) and quantify the amount present (quantitative analysis) of species in a wide variety of settings.

Analytical chemistry is more than a collection of analytical methods and an understanding of equilibrium chemistry; it is an approach to solving chemical problems. Although equilibrium chemistry and analytical methods are important, their coverage should not come at the expense of other equally important topics. The introductory course in analytical chemistry is the ideal place in the undergraduate chemistry curriculum for exploring topics such as experimental design, sampling, calibration strategies, standardization, optimization, statistics, and the validation of experimental results. Analytical methods come and go, but best practices for designing and validating analytical methods are universal. Because chemistry is an experimental science it is essential that all chemistry students understand the importance of making good measurements.

Anatomy and Physiology is a dynamic textbook for the two-semester human anatomy and physiology course for life science and allied health majors. The book is organized by body system and covers standard scope and sequence requirements. Its lucid text, strategically constructed art, career features, and links to external learning tools address the critical teaching and learning challenges in the course. The web-based version of Anatomy and Physiology also features links to surgical videos, histology, and interactive diagrams.

Veterinary nurses need to have a firm grasp of the normal structure of an animal’s body and how it functions before they can understand the effect diseases and injuries have and the best ways to treat them. This book describes the structure of the animal body and the way in which it works. Animals encountered in normal veterinary practice are used as examples where possible.

Ancient History Encyclopedia is a non-profit educational website with a global vision: to provide the best ancient history information on the internet for free.

The Advanced Certificate and the Advanced Diploma in Applications of ICT in Libraries permit library staff to obtain accreditation for their skills in the use of ICT. Anyone can make use of the materials and assessment is available in variety of modes, including distance learning.

This textbook provides a toolbox, a guidebook, and an instruction manual for researchers and interventionists who want to conceptualize and study applied problems from a developmental systems perspective, and for those who want to teach their graduate (or advanced undergraduate) students how to do this. It is designed to be useful to practitioners who focus on applied developmental problems, such as improving the important developmental contexts where people live, learn, and work, including the applied professions in education, social work, counseling, health care, community development, and business, all of which at their core are concerned with optimizing the development of their students, clients, patients, workers, citizens, and others whose lives they touch.

Applied Finite Mathematics covers topics including linear equations, matrices, linear programming, the mathematics of finance, sets and counting, probability, Markov chains, and game theory. Endorsed by CollegeOpenTextbooks.org.

This is a blogspot through which the author has gathered a number of videos, PDF files, and articles to teach basic Arabic. There is information on how to install Arabic on a windows computer, vocabulary lists including the days of the week and Arabic phrases, an article on the history of Arabic grammar, information on the alphabet and how to read and write it, an Arabic keyboard, recorded conversations, links to the Madinah Books, and more. The majority of the information given is accompanied YouTube videos and written explanations.

This textbook is designed for beginning students in Arabic and focuses on formal grammar. It tackles grammar from a classical standpoint and relies on highly technical terminology. The textbook includes exercises based on passages from classic Arabic literature as well as brief anecdotes. Two glossaries are appended at the end of the text. The filesize is 16 MB.

First published in 1910, this book focuses exclusively on the grammar of Modern Standard Arabic as it is used in written Arabic. It contains an introduction that explains the Arabic alphabet and pronunciation and 49 lessons that describe the foundational grammatical elements of MSA, including articles, gender, and the noun and verb systems. The text includes Arabic-English and English-Arabic vocabulary sections as well as a supplement with extract from the Qur'an, classical literature, media, and correspondence. The filesize of the PDF is 32 MB.

This is a textbook for beginning Arabic language learning. The textbook is divided into twelve lessons. Each lesson focuses on an activity and common theme to introduce the basics of Arabic. Each lesson starts with a short video, which you'll be asked to watch. To help you understand the video, each lesson also includes a transcript (in English), a list of vocabulary (with audio clips), and language and grammar notes.

This is an online textbook for basic Arabic. It begins with a brief lesson on the alphabet and then proceeds to units grouped by topic, which move into more advanced Arabic vocabulary and grammar. The lessons are accompanied by audio files and videos, and the videos come with bilingual transcripts. There are 6 total units, and 15 lessons. Each unit has stated learning goals, broken up into specific lessons. Each lessons comes with videos, vocabulary (with corresponding audio files), and notes that relate to grammar.