Category: Ebook

Ata O Antenna Engineering and Radiowave Propagation with MatLAB 2025

General:

Name: Ata O Antenna Engineering and Radiowave Propagation with MatLAB 2025
Format: pdf
Size: 14.01 MB

Book:

Title: Antenna Engineering and Radio Wave Propagation with MATLAB®
Author: Osama W. Ata
Language: English
Year: 2024
Subjects: N/A
Publisher: Independently Published
ISBN: 9788365719294
Total pages: 449

Description:

Unlock the world of ham radio with Building Antennas for HAM Radios, your ultimate guide to mastering the art of antenna construction. Whether you’re a novice eager to set up your first station or a seasoned operator looking to refine your skills, this comprehensive eBook offers a journey from foundational concepts to intricate builds, ensuring you’re equipped for success on-air.

Begin with a deep dive into the fascinating science behind ham radio antennas. You’ll gain a solid understanding of radiation patterns, resonance, polarization, and the critical role that feed points play in affecting your signal quality. With this knowledge, selecting the right antenna for your station will become second nature, tailored perfectly to suit your specific operating goals, space constraints, and budget considerations.

Step into the workshop with confidence as you explore basic tools, materials, and best practices that will set the stage for safe and precise construction. From crafting reliable wire antennas to assembling sophisticated vertical and VHF-UHF models, this guide provides detailed instructions to help you build antennas that are both effective and adaptable to your unique needs.

Navigate the complexities of feed lines, matching, and baluns with clear explanations on how to ensure optimal energy transfer and minimize mismatches. Hone your skills in measuring, tuning, and troubleshooting with practical techniques using SWR meters and antenna analyzers, empowering you to enhance performance and solve common challenges.

Installation serves as a crucial final step, and this eBook prioritizes safety with thorough guidance on correct setup, grounding, and lightning protection. For those ready to elevate their skills, delve into advanced projects exploring multiband and portable solutions that push the boundaries of what’s possible.

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astrophoto13ed

General:

Name: astrophoto13ed
Format: pdf
Size: 132.64 MB

Book:

Title: Astrologia, Astronomia, Astrofizyka
Author: Tadeusz Zbigniew Dworak
Language: polski
Year: 1986
Subjects: N/A
Publisher: Wydawnictwo: Ludowa Spółdzielnia Wydawnicza
ISBN: 83-205-3750-9
Total pages: 164

Description:

Ta książka nie posiada jeszcze opisu.

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Grazia – September 29, 2025 UK

General:

Name: Grazia – September 29, 2025 UK
Format: pdf
Size: 28.8 MB

Book:

Title: AppleMagazine – September 19, 2025 USA
Author: Street Cars 101 Magazine
Language: English
Year: 2022
Subjects: N/A
Publisher: Wydawnictwo: Davis Publications
ISBN: 978-1387616855
Total pages: 170

Description:

Street Cars 101 Magazine-September 2022 Issue 17 Featured Enthusiasts: MyKalSoCal Laguagua Royal CP_STI Heaven Sent Kitt Vipaltima Family Tradition Photographer Spotlight Hunter’s Eye Photographer SHDC4L Photos FFracing19

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AirForces Monthly – July 2025 UK

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Name: AirForces Monthly – July 2025 UK
Format: pdf
Size: 29.42 MB

Book:

Title: Air Force Times – July 2025 USA
Author: Somtow Sucharitkul, Martin Gardner&nbspi inni , Jeff Duntemann, William F. Wu, Ted Reynolds, Baird Searles, Isaac Asimov, Erwin S. Strauss, Richard Sean McEnroe, Peter Allen David, Jon L. Breen, Gordon Dykstra, Larry Tritten, William F. Wu, Peter Payack, Cam Thornleyzwiń
Language: angielski
Year: 1980
Subjects: N/A
Publisher: Wydawnictwo: Davis Publications
ISBN: N/A
Total pages: 60

Description:

CONTENTS

Novella
"Skinner" by Richard Sean McEnroe

Novelette
"Rabid in Mallworld" by Somtow Sucharitkul

Short Stories
"Off We’re Going to Shuttle" by Martin Gardner
"Alternate Genesis" by Peter Allen David
"Cold Hands" by Jeff Duntemann
"The Day of the Trifles" by Jon L. Breen
"Broken Toys" by Gordon Dykstra
"Land of the Great Horse Laughs" by Larry Tritten
"Alien Lover" by Ted Reynolds and William F. Wu
"Dust" by Peter Payack

Poetry
"Last Quarter" by Cam Thornley

Departments
"Editorial: Welcome, Sibling!" by Isaac Asimov
"On Books" by Baird Searles
"Under the Rainbow: On Science Fiction in Hollywood" by Craig Miller
"The SF Conventional Calendar" by Erwin S. Strauss
"Letters"
George H. Scithers, editor
Cover art by Roger Stine

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Hemmings Motor News – September 2025 USA

General:

Name: Hemmings Motor News – September 2025 USA
Format: pdf
Size: 33.7 MB

Book:

Title: All About History 159 – 2025 UK
Author: JOHN D. MacDONALD – Margery Sharp, Mary Lavin, James Purdy, Rona Jaffe, Gloria Vanderbilt, Brooks Baldwin, Stephen Birmingham, Tom & Alice Fleming, Jon Whitcomb, Lyn Tornabene, Ilka Chase, Michele Wood
Language: angielski
Year: 1962
Subjects: N/A
Publisher: Hearst Corporation., New York, NY, USA.
ISBN: 9781534333963
Total pages: 84

Description:

An action-packed sci-fi anthology series following normal people navigating an alternate world where time is having a crisis, and just stepping outside your door can send you on an unexpected adventure.
Time is having a crisis.
Mingling in the red-light district, you can find actual cavemen, medieval knights, and cyborg soldiers on leave from World War IV. Victorian debutantes amble their way into cell phone stores, confused and bewildered (what is a data plan?). On their way to work, bleary-eyed commuters get trapped in time-loops, assaulted by alternate-reality versions of themselves, and try to avoid post-apocalyptic wastelands. And LOOK: the 3:15 bus just took a wrong turn.into the neolithic era.
Rising stars DENIZ CAMP (20TH CENTURY MEN, The Ultimates) and ERIC ZAWADZKI (House of El) and Eisner winners JORDIE BELLAIRE and HASSAN OTSMANE-ELHAOU are proud to present ASSORTED CRISIS EVENTS, an ongoing, zig-zagging anthology series about the compromised clicks of our clocks-full of one-shot stories both beautiful and ugly, tragic and redemptive, surreal and somehow all too familiar.
Stories of people (and reality) in CRISIS-trying to keep it together while the world is falling apart, second by twisted second.

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Arora J Advanced Digital Technologies in Financial and Business Management 2025

General:

Name: Arora J Advanced Digital Technologies in Financial and Business Management 2025
Format: pdf
Size: 46.91 MB

Book:

Title: Advanced Digital Technologies in Financial and Business Management
Author: Jyoti Batra Arora
Language: English
Year: 2025
Subjects: N/A
Publisher: Apple Academic Press
ISBN: 1774917688
Total pages: 377

Description:

Most adults are concerned that children have much too much technology in their lives these days and are spending way too much time on screens. But as Professor Indre Viskontas points out in How Digital Technology Shapes Us, we are not the first to worry that new technology will harm our children and future generations. At least since the beginning of recorded history, we have been underestimating the capacity of the human brain to adapt to and take advantage of emerging technologies. In this course, Professor Viskontas shares some of the most exciting research into this relatively new topic, providing a scientific approach to judging the true pros and cons of our interaction with technology in the digital age.

Many of us believe we are adjusting well to this new digital technology with its constant demands on our time and attention by increasing our multitasking. But multitasking cannot save us because our brain is not capable of true multitasking. What we experience as multitasking is actually our brain flitting back and forth from this task to the next to the next to the next. That we can do, but in the process, we could be losing the ability – and opportunity – to perform deep work, the opportunity for deep reading, and the empathy that builds up when we think deeply about people who are different from us, to truly expand the tribe rather than reinforce tribalism.

The good news is that just recognizing the significance of deep work and deep reading, we can make it a priority and arrange some time to focus on just that without distractions. If we do, those pathways that lead to deeper cognition can become reinforced. We can also help our children focus on the positives of digital media, empowering them to connect with others to find purpose, motivation, and support. We can spend time with them to encourage them to find opportunities for deep reading and deep work in age-appropriate ways.

Digital technology definitely shapes us. But once we learn how it does so, we can make good decisions for our ourselves and our children.

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Arkes J Regression Analysis A Practical Introduction 3ed 2025

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Name: Arkes J Regression Analysis A Practical Introduction 3ed 2025
Format: pdf
Size: 7.4 MB

Book:

Title: Regression Analysis: A Practical Introduction
Author: Jeremy Arkes
Language: English
Year: 2025
Subjects: N/A
Publisher: Wydawnictwo: Wydawnictwo Naukowe PWN
ISBN: 978-1040416556
Total pages: 524

Description:

This thoroughly practical and engaging textbook conveys the skills needed to responsibly develop, conduct, scrutinize, and interpret statistical analyses, without requiring any high-level math.
Regression Analysis details the most common sources of statistical biases, including some not covered in other textbooks. Rather than focusing on complicated equations, the book describes these biases visually and with examples of situations in which they could arise. As the author argues, just learning how to conduct regressions without learning how to properly assess and interpret regressions can do more harm than good. Other unique features include an innovative approach to describing the elusive concept of "holding other factors constant" and proper interpretations of the strength of evidence in light of the Bayesian critique of hypothesis testing. This third edition enhances the emphasis on ethical and responsible research practices and creates more examples demonstrating how the biases and their corrections could affect the regression results.
This is the textbook the author wishes he had learned from, as it would have helped him avoid many research mistakes he made in his career at research organizations and in academia. It is ideal for undergraduate and postgraduate students learning quantitative methods in the social sciences, business, medicine, and data analytics. It will also appeal to researchers and academics looking to better understand regressions.

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Anderson A Past and Current Models in Electrochemistry 2025

General:

Name: Anderson A Past and Current Models in Electrochemistry 2025
Format: pdf
Size: 12.61 MB

Book:

Title: Past and Current Models in Electrochemistry
Author: Alfred Anderson
Language: English
Year: 2025
Subjects: Science, Chemistry, Nonfiction
Publisher: Springer, Springer
ISBN: 3031977904
Total pages: 236

Description:

This monograph provides a comprehensive overview of the key experimental and theoretical developments in electrochemistry from the 1800s to the 2020s. It gives the readers an understanding of the historical beginnings of electrochemical science and the significant advances that have shaped our current knowledge. The book traces the evolution of computational and model approaches used in electrochemistry, emphasizing both historical and present-day quantum chemical theories related to electrocatalysis. It offers insights into phenomenological understanding and mathematical expressions while it also provides an accessible overview for theorists new to electrochemistry who are interested in exploring this field. The book serves as a valuable reference for electrochemists interested in the history of their field and the evolving contributions of quantum chemistry.

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An J Safeguarding Satellite Communications Issues, Challenges, Solutions 2025

General:

Name: An J Safeguarding Satellite Communications Issues, Challenges, Solutions 2025
Format: pdf
Size: 5.17 MB

Book:

Title: Safeguarding Satellite Communications
Author: An, Jianping; Wang, Shuai; Yue, Pingyue; Pan, Gaofeng
Language: English
Year: 2025
Subjects: N/A
Publisher: Wiley-IEEE Press
ISBN: 1394304293
Total pages: 311

Description:

An up-to-date discussion about the mitigation of satellite communications vulnerabilities
In Safeguarding Satellite Communications: Issues, Challenges, and Solutions, a team of distinguished researchers deliver an expert discussion of the most relevant issues in contemporary satellite communications security. Over 13 chapters, the authors discuss key vulnerabilities in satellite communications, including potential security attacks and reliability risks. They also explain proposed solutions based on artificial intelligence technologies, blockchain, terahertz, and spaceborne laser communication.
The book describes several promising research directions – like integrated sensing and computer vision-aided communications – and highlights ISAC-aided secure transmission, CV-aided space communications, mega-constellation security problems, and commercialization issues.
Readers will also find:

• A thorough introduction to satellite communication vulnerabilities and how to mitigate them
• A comprehensive performance evaluation method of satellite communication systems in the presence of randomly distributed terminals
• Practical discussions of the relationship between satellite communication network performance and system factors
• Complete treatments of inter- and intra-system interference in satellite communication systems

Perfect for professionals working in satellite communications and engineers designing and developing satellite communication systems, Safeguarding Satellite Communications will also benefit researchers and students interested in areas like wireless communications, telecommunications engineering, and computer engineering.

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All About Space Apollo Missions 6ed 2025

General:

Name: All About Space Apollo Missions 6ed 2025
Format: pdf
Size: 181.84 MB

Book:

Title: The Apollo Moon Missions
Author: Randy Walsh
Language: English
Year: 2025
Subjects: Americas
Publisher: Independently Published
ISBN: 978-1836483991
Total pages: 135

Description:

FINALLY, A REVEALING LOOK AT THE TECHNOLOGICAL CHALLENGES OF SENDING MANNED MISSION TO THE MOON As a child I was fascinated by the Apollo Moon missions. As I got older the fascination never waned, until, approximately 15 years ago, I happened to watch a documentary on one of the Apollo missions. In that they discussed the method used for circumnavigating the Moon during the missions. As a trained pilot I remember questioning that method of navigation and from there I started to doubt the validity of the Apollo Moon missions itself, which led to subsequent years of research. This book is culmination of that research and the reasons why I believe that the Apollo Moon missions were faked. Included in Part 1 of this series I discuss the following key factors: *The Saturn V rocket and the fraudulent claims on the powerful F-1 engines, without which the Apollo landings could not have taken place. *The non-existent capabilities of the Apollo guidance computer and the fact that this computer was a fake. *The conflicting and contradictory information regarding the radiation intensity between the Earth and Moon which would have prevented any manned lunar landing. *The inadequate shielding for both the Command Module and Lunar Module which would have ended any manned mission outside of Low Earth Orbit in a matter of minutes if not seconds. *And the incomplete, missing and/or destroyed documents along with the thousands of missing reels of telemetry tapes containing data that has been ‘lost’ forever.

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