Blockchain Basics: A Non-Technical Introduction in 25 Steps
Imagine a digital ledger that feels like a shared notebook-every entry is visible to everyone, but no one can erase or alter what’s writen. This book breaks down blockchain in simple, relatable terms, guiding you through 25 clear steps to grasp how it works and why it matters. Without needing to know coding or math, you’ll explore its core purpose: creating trust in a world where people frequently enough doubt each other. Think of it as a system that lets strangers collaborate without a middleman,ensuring fairness and openness in everything from financial transactions to supply chain tracking. The language is warm and approachable, using stories and everyday examples to explain complex ideas, so you’ll never feel lost in the jargon.
Whether you’re curious about how blockchain could transform industries or just want to understand its potential, this book dives into real-world use cases. You’ll discover how businesses are using it to streamline processes, cut costs, and reduce fraud-like a tamper-proof digital fingerprint for contracts or a way to track the origin of products without relying on a single authority. The book also highlights what makes blockchain unique and where it might fall short, helping you form a balanced view. With no prior expertise required, it’s like having a friendly guide who explains the technology’s strengths and challenges side by side, so you can see how it fits into your world without overwhelming you.
Pros
- Zero technical barriers: Concepts are explained with analogies, making them accessible to all.
- Thorough yet concise: Covers both technical foundations and business applications in 25 steps.
- Focus on real-world impact: Highlights how blockchain solves everyday problems across industries.
- No jargon: Avoids complex terms, ensuring clarity for newcomers.
cons
- Brief overview: Not a deep dive into advanced topics or niche use cases.
- Generalized examples: May lack specific case studies for specialized sectors.
- Fast-paced format: Some readers might find the concise steps challenging to grasp.
| Feature | Detail |
|---|---|
| Format | 25 concise steps with no technical complexity |
| Content | Technical concepts + business applications |
| Length | 270 pages |
| Language | English |
| Publisher | Apress |
| publication Date | March 16, 2017 |
Fotodiox Designer (Blue) Rear Lens cap Compatible with Nikon F-Mount Lenses (Non-AI, AI, AIS, AF, AFD, AFS, G, DX, FX)
whether you’re using a vintage Nikon F lens or a modern G-series model, this lens cap ensures a snug, reliable fit. Its twist-on design makes it easy to attach and remove without damaging the lens, while the high-quality ABS construction offers durable protection that lasts through countless photo sessions. The convenient colour coding (with blue being the selected option) helps keep your gear organized, making it simple to identify which cap belongs to which lens. Plus, the stylish design adds a subtle but eye-catching touch to your photography setup, blending functionality with a modern aesthetic that complements your camera accessories.
Designed as a cost-effective option to the original, it delivers the same level of secure fit without compromising on quality or performance. The 2-year manufacturer warranty provides peace of mind, ensuring long-term reliability for your equipment. whether you’re out shooting in the field or storing your lenses at home, this cap is built to protect your investment while blending seamlessly with your workflow. Its compact size and intuitive design make it a practical choice for photographers who prioritize both durability and a polished look.
- Global compatibility: Works with all Nikon F-mount lenses, including older and newer models for a consistent fit.
- Secure twist-on mechanism: Ensures a tight, damage-free connection for reliable protection of rear contacts.
- Durable ABS material: Resists wear and tear, maintaining structural integrity over time.
- 2-year manufacturer warranty: Offers extra assurance against defects or issues.
- Color-coding options: Available in 9 colors, including blue, for quick gear identification.
- Stylish and functional design: Adds visual appeal to your setup while keeping your equipment safe.
- Exclusive to Nikon F-mount lenses: Not suitable for other brands or lens types.
- Color selection fixed in the variant: Only blue is available for the selected product, tho other colors are offered.
| Feature | detail |
|---|---|
| Compatibility | All Nikon F-mount lenses |
| Material | High-quality ABS |
| warranty | 2-Year Manufacturer |
| Color Options | 9 available (blue selected) |
| Fit | Tight, secure twist-on |
| Design | Stylish, practical |
Ultimate Coding Kit for Kids 8-12+. Coding Game for Tweens with 100+ Free Code & STEM Projects. Girls & Boys Learn STEM Hands-On with C++ Programming. Makes a Great Gift for Techy Teens
Discover a Hands-On Coding Adventure
This kit transforms coding into an exciting,tangible experience by blending physical circuit building with creative digital projects. With a dedicated circuit board and access to over 100 online activities,kids learn to code through immediate results-lighting up LEDs,controlling sensors,or crafting interactive sound projects. The combination of guided videos, examples, and challenges ensures a smooth learning curve, while the real-time feedback keeps young learners motivated and curious. Designed by educators and engineers, it fosters a deep understanding of STEM principles, empowering children to think critically and explore the same coding languages used by NASA and leading tech companies. The free software, compatible with Windows, Mac, or Chromebook, requires minimal setup, making it easy to start experimenting without technical barriers.
Empowering Future Innovators
Ideal for kids aged 8 to 15+, this kit offers a flexible learning experience tailored to different skill levels. Younger learners follow structured projects, while older ones can dive into writing their own code and pushing boundaries beyond the lessons. Its all-inclusive design means everything from sensors and buttons to an LCD screen is included, eliminating the need for extra purchases. The emphasis on physical components and real-world applications sets it apart from screen-only tools, encouraging creativity and problem-solving. While it requires an internet connection for software access and may need an adapter for USBC ports, its simplicity and safety-without breadboards or excess wiring-make it accessible for both classrooms and at-home exploration.
- Pros:
- Hands-on circuit building with real-time feedback
- Over 100+ projects and compatibility with major tech platforms
- Award-winning recognition for educational excellence
- Self-paced learning for diverse ages and skill levels
- Comprehensive components included-no extra purchases needed
- Quick setup with minimal software requirements
- Cons:
- Requires internet connection for software access
- Not compatible with tablets or smartphones
- Includes small parts; safety warnings must be followed
- May need an adapter for USBC computer ports
| Feature | Detail |
|---|---|
| Age Range | 8-15+ |
| Compatibility | Windows, Mac, Chromebook (adapter for USBC) |
| Components Included | LED strip, sensors, buttons, LCD screen, USB-A cable |
| Awards | Family Choice Seal of Approval, Gold Award, Modern Library Platinum Award |
| Learning experience | Safety-focused, no resistors or breadboards required |
LongPlus Security Camera System, 4K Cameras 8 Channel Wired Cameras for Home Security camera Outdoor 2TB 4pcs wired PoE Cameras System with AI Detection, Audio&Strobe Light Alarm, LP8ME84D1
Experience unparalleled clarity and coverage with this advanced security camera system, engineered to provide 4K UHD resolution that sharpens every detail, whether it’s a sunrise, sunset, or midnight scene. its 132° ultra-wide view angle, paired with HDR technology, ensures no blind spots-perfect for monitoring large areas like driveways, yards, or entryways. The triple night vision modes deliver vibrant, full-color footage even in low light, letting you see faces and objects clearly from up to 100 feet away. when motion is detected, the system’s clever alerts and customizable activity zones help you stay informed while minimizing distractions from unwanted activity, giving you peace of mind without the hassle.
Designed for both indoor and outdoor use, the camera’s durable metal casing withstands extreme weather, making it a reliable guardian for your home or business. With two-way audio, you can interact with visitors or deter intruders in real time, and the strobe light alarm adds a visible deterrent. Flexible storage options let you leverage up to 10TB of HDD capacity (2TB included) or cloud backup, ensuring your footage is securely preserved without ongoing subscription fees. The system also supports remote access via a user-friendly app, allowing up to 32 users to view and share footage seamlessly. plus, the included 2-year warranty and lifetime technical support ensure your investment is protected for the long haul.
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Pros
- Crystal-clear 4K resolution for vivid detail
- Triple night vision modes for reliable visibility
- Two-way audio and strobe light alarm for immediate response
- Durable outdoor design with weather resistance
- Flexible storage solutions with 10TB capacity
- 32-user access for shared security monitoring
- 2-year warranty and lifetime technical support
- Higher price compared to basic models
- Requires additional 10TB HDD for full capacity
- 99% motion detection accuracy may miss rare events
- Depends on internet connectivity for advanced features
Cons
| Resolution | 4K UHD |
|---|---|
| Night Vision | Triple modes (IR, color, smart) |
| View Angle | 132° wide |
| Storage | Up to 10TB HDD (2TB included) |
| Users | 32 users (includes privacy mask) |
| Product | Key Features | Pros | Cons |
|---|---|---|---|
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LongPlus PoE IP Camera 4K |
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Achieve New Heights
LongPlus Security Camera System, 4K Cameras 8 Channel Wired Cameras for Home Security Camera Outdoor 2TB 4pcs Wired PoE Cameras System with AI Detection, Audio&Strobe Light Alarm, LP8ME84D1
✅【4K UHD/132° Wide View Angle】
Capature stunning moments in any light-sunrises, sunsets, and night scenes with crystal-clear 4K resolution(3840X2160) to record footage with better contrast, color, and low-light performance than what was previously possible.Combinate 132° wide view angle and HDR, when incidents do occur, this 4K/8MP home security camera system offers the best chance of capturing great details.
✅【AI Motion Detection/Activity Zone】
This smart PoE security camera’s object detection can detect a wide range of objects, including humans, vehicles, and pets, with up to 99% accuracy. When motion is detected, the AI system can classify it and send real-time alerts about potential security threats. Setting Activity Zones & privacy mask allow you to eliminate areas in your camera’s field of view which will ignore the motion occurring in the activity zone to prevent sending unwanted motion notifications.
✅【triple Night Vision Modes】
longplus 4K security camera system stands out as a top choice for color night vision IP cameras, offering 4K UHD resolution for remarkable clarity. its low-light color night vision delivers vibrant, full-color footage even in low light condition, allowing you to clearly identify faces and objects from up to 100ft/30m away, 3 mode night visions(IR Night Vision/ Color Night Vision/ Smart Night Vision) are available for different scenario.
✅【Audio & Strobe Light Alarm/ Two-way Audio】
When detected a humanoid(vehicle/pets motion), you can tap into the two-way audio to have a conversation, meanwhile the PoE dome camera will automatically trigger an audio and Red & Blue strobe light to scare off the intruder promptly. This house security system is the best choice for you to install it outside such as garaga, yard, doorway, store, apartment ect.
✅【Flexible Storage/ Playback】
Benefit from cost-effective storage solutions to utilize up to 10TB HDD storage (2TB HDD is included), eliminating the need for additional subscription fee. Bank-level encrypted cloud storage is for your option. Just grab your smart device to playback the live view via Longvision APP/Client in no time with highlighted lines on the timeline and event that indicate motion events.
✅【Play and Plug PoE IP Camera】
This PoE camera 4K can be placed in locations without access to power outlets, providing greater flexibility in surveillance coverage. This versatility allows homeowners and businesses to deploy cameras in strategic position without being limited by power constraints.
✅【Design for outdoor/ 32 Users Access】
Featuring a durable metal body, you can holds up Longplus NVR camera system to a range of extreme weather conditions without missing a beat making it ideal for both indoor and outdoor surveillance. You can access live footage remotely via Longvision app compatible with iOS, Mac, Windows, and Android and share the video with other 31 users (support 32 users) to enjoy the peace of mind.
✅【2-Years Warranty】
LongPlus provides a 2-year warranty and lifetime technical support for our customers. If you have any inquiries, feel free to contact us. Our professional technical team will respond to your queries within 24 hours.
- Pros:
- Cons: