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Polars Cookbook: Over 60 practical recipes to transform, manipulate, and analyze your data using Python Polars 1.x by Yuki Kakegawa
English | August 23, 2024 | ISBN: 1805121154 | 394 pages | PDF | 26 Mb
Leverage Polars, a lightning-fast DataFrame library, to transform your Python-based data science projects with efficient data wrangling and manipulation

Key FeaturesUnlock the power of Python Polars for faster and more efficient data analysis workflowsMaster the fundamentals of Python Polars with step-by-step recipesDiscover data manipulation techniques to apply across multiple data problemsPurchase of the print or Kindle book includes a free PDF eBookBook Description
The Polars Cookbook is a comprehensive, hands-on guide to Python Polars, one of the first resources dedicated to this powerful data processing library. Written by Yuki Kakegawa, a seasoned data analytics consultant who has worked with industry leaders like Microsoft and Stanford Health Care, this book offers targeted, real-world solutions to data processing, manipulation, and analysis challenges. The book also includes a foreword by Marco Gorelli, a core contributor to Polars, ensuring expert insights into Polars' applications.
From installation to advanced data operations, you'll be guided through data manipulation, advanced querying, and performance optimization techniques. You'll learn to work with large datasets, conduct sophisticated transformations, leverage powerful features like chaining, and understand its caveats. This book also shows you how to integrate Polars with other Python libraries such as pandas, numpy, and PyArrow, and explore deployment strategies for both on-premises and cloud environments like AWS, BigQuery, GCS, Snowflake, and S3.
With use cases spanning data engineering, time series analysis, statistical analysis, and machine learning, Polars Cookbook provides essential techniques for optimizing and securing your workflows. By the end of this book, you'll possess the skills to design scalable, efficient, and reliable data processing solutions with Polars.
What you will learnRead from different data sources and write to various files and databasesApply aggregations, window functions, and string manipulationsPerform common data tasks such as handling missing values and performing list and array operationsDiscover how to reshape and tidy your data by pivoting, joining, and concatenatingAnalyze your time series data in Python PolarsCreate better workflows with testing and debuggingWho this book is for
This book is for data analysts, data scientists, and data engineers who want to learn how to use Polars in their workflows. Working knowledge of the Python programming language is required. Experience working with a DataFrame library such as pandas or PySpark will also be helpful.
Table of ContentsGetting Started with Python PolarsReading and Writing FilesAn Introduction to Data Analysis in Python PolarsData Transformation TechniquesHandling Missing DataPerforming String ManipulationsWorking with Nested Data StructuresReshaping and Tidying dataTime Series AnalysisInteroperability with Other Python LibrariesWorking with Common Cloud Data SourcesTesting and Debugging in Polars

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Politics, Economy, and Society in Twentieth-Century Nigeria By Ayodeji Olukoju, Tokunbo A. Ayoola (eds.)
2023 | 346 Pages | ISBN: 1666929964 | EPUB | 1 MB
Politics, Economy, and Society in Twentieth-Century Nigeria, by Ayodeji Olukoju and Tokunbo A. Ayoola, examines key social, political, and economic issues in Nigeria since the colonial period. This book brings together writings on colonial, postcolonial, and contemporary history of Nigeria that provide a panoramic view of diversity, bridge gaps in Nigerian history, and engage with pioneering scholarship in railway and social history in Nigeria by James Olawale Oyemakinde. Some of the themes and perspectives discussed throughout this collection include: contemporary challenges of poverty, unemployment, leadership and governance deficit, entrepreneurship, urbanization, and the underdevelopment of the agricultural and transport systems. Politics, Economy, and Society in Twentieth-Century Nigeria demonstrates that understanding the past helps to develop appropriate policies for contemporary challenges. As highlighted in this volume, it is important to appreciate the significance of context in historical explanation and in the application and adaptation of ideas across space and time.

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PROMPT ENGINEERING: THE BEST PROMPTS by MARCUS PINTO
English | October 20, 2024 | ISBN: N/A | ASIN: B0DKB5W211 | 110 pages | EPUB | 1.16 Mb
Imagine having a personal assistant who understands your deepest needs and generates innovative ideas on demand. Imagine having access to a vast ocean of knowledge, where you can find answers to any question and solutions to any problem. This is not science fiction; It's the reality of prompt engineering.

In this book, you will:
- Master the art of creating effective prompts: Learn how to formulate the right questions to get the best answers from language models.
- Unlocking the Potential of Artificial Intelligence: Discover how to utilize AI to increase your productivity, creativity, and problem-solving skills.
- Explore diverse application areas: From creative writing to data analysis, prompt engineering has endless applications.
- Increase your influence: Learn to communicate your ideas more clearly and persuasively, using AI as your ally.
- Spark your curiosity: Discover how prompt engineering can open doors to new areas of knowledge and experiences.
This book is for you if you:
- You are a professional who seeks to optimize your work processes and increase your productivity.
- You are a creative who wants to explore new forms of expression and generate innovative content.
- You are a student who seeks to delve deeper into the world of artificial intelligence.
- It's anyone curious about the future of technology and how to interact with it.
With prompt engineering, you'll have the key to unlocking the potential of artificial intelligence and turning it into your most powerful ally. Imagine being able to generate ideas for a new project, write a persuasive email, create an effective marketing plan, or even write a novel, all with the help of a language model and your skills in prompt engineering.
This book will teach you:
- How to create prompts that generate specific, personalized results.
- How to explore different styles and tones of voice.
- How to iterate and refine your prompts for the best results.
- How to apply prompt engineering in a variety of areas, from leadership to education.
With this book, you'll be ready to unlock the infinite potential of artificial intelligence and shape the future in your own way.
About the author
Prof. Marcão, with extensive experience in information technology and marketing, works as a business consultant, career mentor and content producer. Author of more than 100 books, he uses innovative methodologies for efficient projects, contributing to information architecture.

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Proper Group Actions and the Baum-Connes Conjecture by Guido Mislin , Alain Valette
English | PDF | 2003 | 138 Pages | ISBN : 3764304081 | 14.3 MB
A concise introduction to the techniques used to prove the Baum-Connes conjecture. The Baum-Connes conjecture predicts that the K-homology of the reduced C^*-algebra of a group can be computed as the equivariant K-homology of the classifying space for proper actions. The approach is expository, but it contains proofs of many basic results on topological K-homology and the K-theory of C^*-algebras. It features a detailed introduction to Bredon homology for infinite groups, with applications to K-homology. It also contains a detailed discussion of naturality questions concerning the assembly map, a topic not well documented in the literature.

The book is aimed at advanced graduate students and researchers in the area, leading to current research problems.
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Luigi Siciliani, "Public Health Care "
English | ISBN: 1009578766 | 2025 | 75 pages | PDF | 1303 KB
This Element discusses the role of the government in the financing and provision of public health care. It summarises core knowledge and findings in the economics literature, giving a state-of-the-art account of public health care. The first section is devoted to health system financing. It provides policy rationales for public health insurance which rely on both equity and efficiency, the co-existence of public and private health insurance, how health systems deal with excess demand, and the effect of health insurance expansion. The second section covers the provision of health care and the effect of policy interventions that aim at improving quality and efficiency, including reimbursement mechanisms, competition, public-private mix, and integrated care. The third section is devoted to the market for pharmaceuticals, focusing on the challenges of regulating on-patent and off-patent markets, and discussing the main incentives for pharmaceutical innovation.

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Public Relations and Strategic Communication in 2050 by Alexander V. Laskin, Karen Freberg
English | November 25, 2024 | ISBN: 103273096X | 280 pages | MOBI | 4.20 Mb
Taking stock of the technological, political, economic, and social trends that exist today, this book extends the discussion to analyze and predict how these trends will affect the public relations and strategic communication industry of the future.

This book is divided into two sections, the first addressing such key topics as artificial intelligence (AI), big data, political polarization, and misinformation, the second looking at key facets of the profession, such as media relations, crisis communication, and measurement and evaluation. Leading researchers in the discipline share their analysis of these topics while also providing theoretically based and practically relevant insights on how the industry must evolve to keep up with, and perhaps anticipate, changes in culture, society, and technology.
This book will be of interest to scholars, industry professionals, and advanced undergraduate and graduate students in public relations and strategic communication.

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Public Service Exemplars by J. Michael Martinez
English | August 2, 2024 | ISBN: 103221225X | 364 pages | PDF | 5.17 Mb
Understanding and encouraging the development of good leaders are so important that schools of business administration, public administration, public policy, and organizational development teach courses in leadership. Within the public administration literature, scholars have discussed the value of studying outstanding individuals who have been uniquely effective in fulfilling their formal duties, as well as ethical in leading their organizations. Public Service Exemplars is the first book to highlight the decision-making styles of American public servants who serve as models of excellence in public service.

While the roles they held, eras in which they served, formal training for the job, personalities, and relative levels of fame differ widely, the figures profiled in this book are united in their strong belief in the efficacy of government service and a willingness to employ innovative methods for accomplishing objectives. Examining three theories of decision-making by effective leaders (autocratic leadership, democratic leadership, and delegative leadership), this book explores the way that unelected leaders working within public agencies―and, in a couple of cases, the US military―reached decisions that are widely considered to be highly effective. Profiling leaders as diverse as Robert Moses, Frances Perkins, James Webb, Colin Powell, and Anthony Fauci, to name a few, Public Service Exemplars questions whether great leadership truly is, as it is often assumed, an elusive, almost indefinable quality. Can it be taught? Are effective leaders born, made, or a combination thereof? This book will be of keen interest to both current and future public service leaders, including students enrolled in public administration and nonprofit management courses.

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Python Automation for Small Business Owners: Boost Efficiency and Simplify Operations by Dargslan Publishing
English | December 3, 2024 | ISBN: N/A | ASIN: B0DPKB426W | 379 pages | EPUB | 0.51 Mb
Unlock the power of automation for your small business with "Python Automation for Small Business Owners: Streamline Operations and Boost Efficiency." This comprehensive guide is designed to help entrepreneurs and small business managers harness the potential of Python programming to simplify tasks, save time, and drive growth.

In today's fast-paced business world, every minute counts. As a small business owner, you're constantly juggling multiple responsibilities, from sales and marketing to customer support and inventory management. This book offers a practical solution to the time crunch, introducing you to the world of Python automation - even if you have no prior coding experience.
Why Python? It's a versatile, beginner-friendly programming language that's perfect for automation tasks. With its readable syntax and extensive libraries, Python provides powerful tools that are easy to learn and implement in your business operations.
Inside this book, you'll discover:A step-by-step approach to learning Python basics, tailored for busy entrepreneursPractical applications of Python automation in various aspects of small business operationsHow to use essential Python libraries like Pandas, Requests, and BeautifulSoupTechniques for automating data analysis, web scraping, and report generationMethods to integrate Python scripts with popular business tools like Google Sheets, Mailchimp, and CRM systemsReal-world case studies and examples that you can adapt to your specific business needsTroubleshooting tips and best practices for smooth implementationEach chapter focuses on specific small business challenges and provides actionable solutions. You'll learn how to:Automate inventory management and generate real-time stock reportsStreamline customer data analysis and personalize marketing effortsCreate automated social media posting schedulesSimplify bookkeeping and financial reporting tasksSet up automated email responses and customer support workflowsScrape web data for market research and competitor analysisGenerate custom reports and data visualizationsThe book is structured to accommodate both complete beginners and those with some coding experience. You can follow the chapters sequentially or jump to sections that address your immediate business needs. Each chapter includes practical examples, sample codes, and exercises to reinforce your learning.
"Python Automation for Small Business Owners" goes beyond just teaching code - it shows you how to think strategically about automation in your business. You'll gain insights into:Identifying processes that are ripe for automationBalancing automation with the personal touch that sets small businesses apartScaling your automation efforts as your business growsStaying compliant with data protection regulations while leveraging automationBy the end of this book, you'll have the skills and confidence to implement Python automation solutions that can dramatically improve your business efficiency. You'll be able to reclaim valuable time, reduce errors in repetitive tasks, and gain deeper insights into your business operations.
Start your journey towards a more efficient, data-driven, and competitive small business today with "Python Automation for Small Business Owners: Streamline Operations and Boost Efficiency."

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Quantum Mechanics via Lie Algebras by Arnold Neumaier, Dennis Westra
English | March 1, 2023 | ISBN: 3110406101 | 504 pages | MOBI | 1.50 Mb
This monograph introduces mathematicians, physicists, and engineers to the ideas relating quantum mechanics and symmetries - both described in terms of Lie algebras and Lie groups. The exposition of quantum mechanics from this point of view reveals that classical mechanics and quantum mechanics are very much alike. Written by a mathematician and a physicist, this book is (like a math book) about precise concepts and exact results in classical mechanics and quantum mechanics, but motivated and discussed (like a physics book) in terms of their physical meaning. The reader can focus on the simplicity and beauty of theoretical physics, without getting lost in a jungle of techniques for estimating or calculating quantities of interest.

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R Data Structures and Algorithms
English | 2016 | ISBN: 9781786465153 | 363 Pages | EPUB (True) | 19 MB
We begin by answering the fundamental question: why data structures? We then move on to cover the relationship between data structures and algorithms, followed by an analysis and evaluation of algorithms. We introduce the fundamentals of data structures, such as lists, stacks, queues, and dictionaries, using real-world examples. We also cover topics such as indexing, sorting, and searching in depth.

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Reds, Whites, and Blues: Social Movements, Folk Music, and Race in the United States (Princeton Studies in Cultural Sociology) by William G. Roy
English | July 21, 2010 | ISBN: 0691143633, 0691162085 | True EPUB | 296 pages | 2.8 MB
Music, and folk music in particular, is often embraced as a form of political expression, a vehicle for bridging or reinforcing social boundaries, and a valuable tool for movements reconfiguring the social landscape. Reds, Whites, and Blues examines the political force of folk music, not through the meaning of its lyrics, but through the concrete social activities that make up movements. Drawing from rich archival material, William Roy shows that the People's Songs movement of the 1930s and 40s, and the Civil Rights Movement of the 1950s and 60s implemented folk music's social relationships-specifically between those who sang and those who listened-in different ways, achieving different outcomes.

Roy explores how the People's Songsters envisioned uniting people in song, but made little headway beyond leftist activists. In contrast, the Civil Rights Movement successfully integrated music into collective action, and used music on the picket lines, at sit-ins, on freedom rides, and in jails. Roy considers how the movement's Freedom Songs never gained commercial success, yet contributed to the wider achievements of the Civil Rights struggle. Roy also traces the history of folk music, revealing the complex debates surrounding who or what qualified as "folk" and how the music's status as racially inclusive was not always a given.
Examining folk music's galvanizing and unifying power, Reds, Whites, and Blues casts new light on the relationship between cultural forms and social activity.

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Regeln der Jurisprudenz: Die Grundsätze und Methoden der Rechtswissenschaft als professionelle Standards By Bernhart, Christof
2008 | 176 Pages | ISBN: 3428128052 | PDF | 1 MB
Christof Bernhart geht von einem simplen Befund aus, der gleichwohl nicht gebührend beachtet wird: Die Rechtswissenschaft beschränkt sich zunehmend auf eine Gesetzestechnik. Es handelt sich um einen allmählichen Abbau, der aber bereits konkrete Auswirkungen zeitigt. Sie reichen bis auf das Selbstverständnis der Berufsangehörigen, denen die Vorstellung, einen wissenschaftlichen Beruf auszuüben, zunehmend abhanden kommt. Die Wissenschaftlichkeit der Jurisprudenz wird allerdings verschiedentlich in Zweifel gezogen. Die verbreitete methodische Ratlosigkeit und berufsethische Beliebigkeit machen die Klärung des Selbstverständnisses des Juristen notwendig.Das Ziel des Autors besteht darin, die wissenschaftlichen Grundsätze und Methoden zu definieren und ihre praktische Bedeutung als professionelle Standards darzustellen. Es soll in einer knappen Darlegung eine in sich schlüssige Konzeption präsentiert werden. Dafür ist es erforderlich, Aspekte zu behandeln, die in der Literatur keine gebührende Berücksichtigung finden. Hier sollen nicht abermals die gängigen Positionen der Rechtsphilosophie und der Methodenlehre wiederholt werden. Der Verfasser erhebt zwar den Anspruch einer Abhandlung. Es handelt sich aber auch um ein Manifest, das über die Behandlungsweise des positiven Rechts hinausführt, mit dem Ziel, im Recht mehr als eine bloße Spielregel der Gesellschaft zu sehen.

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Ortrud Westheider, "Rembrandt's Orient: West Meets East in Dutch Art of the 17th Century"
English | ISBN: 3791359630 | 2021 | 264 pages | PDF | 164 MB
This book sheds light on the fascinating ways Rembrandt and other Golden Age painters were influenced by Eastern culture.

In the 17th century, Amsterdam was a vibrant hub of the burgeoning European trade with Asia, Africa, and the Levant, importing copious amounts of foreign items that powerfully stimulated the imagination of numerous Dutch artists. This was notably the case with Rembrandt, whose curiosity and voraciousness as a collector were legendary in his time. Throughout his prolific career, he drew on Eastern influences in genres as diverse as history painting and portraiture, including depictions in which he himself adopted Oriental styled attire. This lavishly illustrated book explores the inventive ways in which Rembrandt and his contemporaries accommodated Eastern imagery into their own repertoire, set within the wider context of Holland's rapidly expanding commercial and cultural exchange with its non-European trading partners. The problematic term "Orient" was widely used in Rembrandt's time and will be discussed at great length in this catalogue.
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Renaturing: Small Ways to Wild the World by James Canton
English | March 13th, 2025 | ISBN: 1837260397 | 256 pages | True EPUB | 2.24 MB
Twenty years ago, James Canton moved from London to the English countryside. Behind his farm labourer's cottage was a small field with a 'for sale' sign. At first it was a site for family picnics and cricket matches with friends, but James knew that the two-acre patch of earth held more potential - as a place for nature to return and flourish.

Here is the story of how, over a number of years, he undertook a project to 'rewild' the field: digging a pond, forging meadowlands, creating habitats for birds and insects, encouraging flowers and plants that support pollinators and wildlife. Eventually what was once just a grassy space was again buzzing with life.
The process raised some interesting questions. Rewilding is about bringing a large landscape back to a natural, self-sustaining state. But that wasn't possible on the scale of a field, a garden or a window box. What if we rethought the term? What if we aimed for 'renaturing' instead? Even on the smallest of scales we can create habitats to support a greater diversity of nature. A single window box planted with pollinator-friendly flowers can provide a mini-habitat to support honeybees; a tower block with a window box on every balcony becomes an acre of bee-friendly ecosystem.
Renaturing shows how the concept of rewilding can be adopted by us all. We can all make positive change, however large or small. We can all be involved in caring for and restoring the natural world.

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Research Problems in Discrete Geometry by Peter Brass , William O. J. Moser , János Pach
English | PDF (True) | 2005 | 507 Pages | ISBN : 0387238158 | 5.1 MB
Although discrete geometry has a rich history extending more than 150 years, it abounds in open problems that even a high-school student can understand and appreciate. Some of these problems are notoriously difficult and are intimately related to deep questions in other fields of mathematics. But many problems, even old ones, can be solved by a clever undergraduate or a high-school student equipped with an ingenious idea and the kinds of skills used in a mathematical olympiad.

Research Problems in Discrete Geometry is the result of a 25-year-old project initiated by the late Leo Moser. It is a collection of more than 500 attractive open problems in the field. The largely self-contained chapters provide a broad overview of discrete geometry, along with historical details and the most important partial results related to these problems. This book is intended as a source book for both professional mathematicians and graduate students who love beautiful mathematical questions, are willing to spend sleepless nights thinking about them, and who would like to get involved in mathematical research.
Important features include:
- More than 500 open problems, some old, others new and never before published
- Each chapter divided into self-contained sections, each section ending with an extensive bibliography
- A great selection of research problems for graduate students looking for a dissertation topic
- A comprehensive survey of discrete geometry, highlighting the frontiers and future of research
- More than 120 figures
- A preface to an earlier version written by the late Paul Erdos
Peter Brass is Associate Professor of Computer Science at the City College of New York. William O. J. Moser is Professor Emeritus at McGill University. Janos Pach is Distinguished Professor at The City College of New York, Research Professor at the Courant Institute, NYU, and Senior Research Fellow at the Rényi Institute,Budapest.
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