Over the past two decades, advanced technologies and space missions have completely transformed our understanding of potential life beyond Earth. The resulting field, astrobiology, has become a multidisciplinary scientific discipline, encompassing many of the natural sciences and having implications for many areas of research. This book presents an introduction and overview of astrobiology. It deals with a wide range of fields, from the search for signs of life on planets in our solar system, to the discovery of exoplanets in distant solar systems and assessing the potential for life there. The book is based on the course of the same name that the author taught for more than two decades at the Hebrew University, and the course recorded on YouTube in the Cornerstones program , which has accumulated tens of thousands of views. The book is accessible not only to students of natural sciences, but to any reader who wants to learn about and understand the fascinating possibilities of life on other worlds.

If a large rock had collapsed in a desert or a tree had fallen in the heart of a distant forest several hundred miles away from living beings, would it have made a sound upon its fall? Different people will give different answers to this ancient question. Objectively, some will say that a sound would have been heard because sound does not exist only in the mind of the listener. Subjectively, some would say that a sound requires someone to listen to it. What is correct? Is this complex answer related to the essence of sound? It's All in the Sound investigates the phenomenon of sound and tries to understand it and answer, among other things, the above questions. It was written to meet the needs of students and teachers, with a desire to update the teaching of physics and fill the shortage of textbooks in this field, which is associated with teaching the subject of sound waves. The gradual development of the concept of sound is discussed in the book by building structured experimental illustrations, as well as mathematical expressions describing this miraculous phenomenon. The illustrations were chosen so that a curious reader could repeat most of the experiments in a home environment without the need for special laboratory equipment. Even for readers unfamiliar with the basics of physical mathematics that describe sound, this book may provide a unique experience and open up a new window to understanding physics.

The New Arabic-Hebrew Dictionary is a comprehensive reference of the Arabic language throughout history, with a focus on its use in spoken and written media. Given Arabic's rich literary tradition spanning over 1,400 years, the language naturally incorporates words and expressions rooted in ancient literary strata, including the Qur'an, classical poetry, proverbs, the Hadith, jurisprudential literature, Adab literature, and historical texts. Terms and expressions from the realm of Islamic theology and jurisprudence, which were considered archaic 50 or 60 years ago, have regained prominence with the rise of fundamentalist Islam in the 1970s. This dictionary offers translations and explanations for these terms as well. After publishing the full dictionary in a large, 700-page edition, we decided it would be useful to publish a more concise version—smaller, portable, and easier to handle. This edition differs from the full dictionary in that it omits examples and comments, as well as archaic entries from ancient poetry, the Hadith, and jurisprudential literature. To the full edition of The New Arabic-Hebrew Dictionary

Mithabrim: Syntax for Higher Levels is a practice, comprehension and expression booklet on syntax topics. The booklet is intended for advanced students according to the curriculum of the Hebrew Teaching Unit at the Hebrew University of Jerusalem. The booklet has two purposes. The first of which is the acquisition and practice of syntactic components and structures at the advanced levels. The topics are practiced in several ways: open exercises, closed exercises, conversions, rewrites. Some of the grammatical topics are preceded by a short grammatical explanation for that section, and at the end of the booklet there are tables related to the syntactic topics as well as solutions to the closed exercises. The second goal of Mithabrim is to cultivate students' comprehension and expression skills with the help of reading passages (essays, articles, etc.). The reading sections, which incorporate the new syntactic topic, deal with different and diverse contents. This is the infrastructure for the activity of reading comprehension and the activity of oral or written expression. For each section, both comprehension questions that relate to the content of the section and expression questions that encourage discussion and conversation on the topic have been added.

This book is part of the series of textbooks for electrical engineers by Dima Budansky. The series is intended for students studying electrical engineering according to the curriculum of the Israeli Ministry of Economy. The author of the book has rich experience of thirty years in teaching and working as an electrical engineer with an electrician engineer license in the fields of planning, execution, and maintenance of electrical installations. The first part of the book describes and details the execution stages of a final project in electrical engineering studies. The second part is a sample project, carried out by students. In the appendices section, technical data sheets of electrical equipment are presented. More in this series by Dima Budansky: Electrical Structures and Power Systems - Theory and Exam Solutions Electric Machines and Drives - Theory and Exam Solutions High Voltage Installations - Principles, Equipment, Operation and Safety

This booklet is a test booklet that accompanies the book Hebrew from Scratch Part 2 . The booklet follows the 16 chapters of the book and includes 9 exams following the chapters. The booklet is intended for students studying from the book Hebrew from Scratch Part 2 who wish to test themselves independently at the end of each chapter to assess their level of knowledge and their abilities. Students can also use the solutions at the end of the booklet. The exams refer to all aspects studied in the chapter: reading comprehension, writing following a text, repeating vocabulary, and grammatical knowledge. At the end of the booklet are solutions for the tests. The solutions are for the grammar sections, but not for the comprehension sections. The linguistic instructions are translated into English to make it easier for the students, and in addition, examples are given to solve the exercises. Each exam includes a section with questions followed by a writing section. In addition, each exam includes grammatical materials: a verb or syntax studied or emphasized in the chapter. Some of the exams are also accompanied by vocabulary exercises based on the studied chapter or on previous chapters.

In the book From the Word to the Sentence , advanced Hebrew learners deal with the syntax system and the morphology of the Hebrew language. The book repeats structures and forms studied in lower levels and combines them in contexts adapted to the exemption level in terms of vocabulary. It also deals extensively with structures used in high literary and academic writing. At the beginning of the book is a table of the morphological and syntactic items taught in all levels in the Hebrew teaching unit at the Hebrew University. These grammatical items serve as an outline for the contents of the book. The book opens with the parts of speech and different types of conjunctions and continues with different types of sentences. Each chapter discusses one topic and opens with a poem that includes or demonstrates the use of the structure discussed in the chapter. Detailed and in-depth explanations, tables and comments follow. The practice is done through many and varied exercises both in sentences and in cloze exercises, which can also be seen as texts for discussion and as a basis for expression. The solutions are given at the end of the book.

This book is published as part of a series of textbooks for electrical engineers by Dima Budansky. The series is intended for students studying electrical engineering by the curriculum of the Israeli Ministry of Economy. The author of the book has rich experience of about thirty years in teaching and working as a licensed electrical engineer in the fields of planning, execution and maintenance of electrical installations. The first part of the book combines topics included in the curriculum and solving questions from the MHT (Technological Training Institute) tests. The second part is a collection of test solutions from recent years.

The New Arabic-Hebrew Dictionary is a dictionary of the Arabic language across the ages, with focus on the language of the spoken and written media. The dictionary also reflects the rich literary history of the Arabic language, of more than 1,400 years, including the Qur'an, ancient poetry, proverbs, the Hadith and jurisprudential literature, Adab literature and historical literature. Terms and expressions from the sphere of Islamic theology and jurisprudence, which were considered archaic 50 or 60 years ago, have come back into use following the rise of fundamentalist Islam in the 1970s, and this new dictionary provides translations and explanations for these terms as well. With over 44,000 entries, this dictionary is today the most comprehensive, up-to-date and reliable dictionary of contemporary Arabic. User-friendly: full vocalization of all Arabic and Hebrew entries. About 6,000 examples from Arabic literature of all eras and from the press clarify the use of words. Over 4,000 grammatical and historical notes. The New Arabic-Hebrew Dictionary is intended for university students and scholars, school pupils and teachers and anyone interested in the Arabic language. To the concise edition of The New Arabic-Hebrew Dictionary

Here and Now - Audio are Hebrew study audio sequences designed for those who wish to practice speaking, listening, writing and reading on everyday topics and situations. The sequences accompany the booklet, which is suitable for intermediate levels and consists of five units, each of them focuses on a different aspect of life: movement, housing, food, work and family. Each unit has appropriate dialogues.

Despite many decades of research, we seem to linger in a state of confusion regarding what leadership is and if or how it might be cultivated. The book offers a new perspective on leadership, whereby what defines leadership is not one’s position or successful conduct but action of a certain kind. More specifically, leadership is about realizing the human potential to think, create or act outside the boundaries of what is known and safe in order to serve the greater good. What distinguishes “acts of leadership” is that they take place in a sphere of ambiguity and uncertainty. As such, acts of leadership are essentially risky, bold and adventurous. Obstacles and opponents are to be expected and no measure of success can be guaranteed. By placing leadership in its unique sphere of action, we realize that widely accepted prescriptions for rational or sensible conduct do not apply and that relying on them may shut us down before we even begin. We further appreciate that such acts exemplify “action” in its deepest sense: what we choose to do as free individuals in an uncertain universe, and how we do it, is a self-defining act; it makes us who we are.