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Anonymous

Michaelgrify

02 May 2025 - 01:23 pm

Broken spheres
Dyson died in 2020 before any of his spheres could be found — although they are just one of a dozen ideas that bear his name.
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“As a young scientist, Dyson showed that three competing quantum theories were actually the same theory — he summarily ended the competition,” said William Press, the Leslie Surginer Professor of Computer Science and Integrative Biology at the University of Texas at Austin. He was not involved in the study. “Later, he applied his genius to areas of astronomy, cosmology, the extraterrestrial realm, and also the very real problem of nuclear proliferation here on planet Earth. At the time of his death, he was recognized as a provocative and creative thinker.”

George Dyson also attested to his father’s fascination and comprehensive reach across disciplines.
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“Taking advantage of a short attention span and an aversion to bureaucracy, he contributed to five fields of mathematics and eleven fields of physics, as well as to theoretical biology, engineering, operations research, literature, and public affairs,” the younger Dyson said. “Many of his ideas were controversial, with one of his guiding principles being that ‘It is better to be wrong than to be vague.’”

The approach of the researchers behind the new study could offer a more fruitful path in the search for extraterrestrial intelligence, said Tomotsugu Goto, an associate professor of astronomy at the National Tsing Hua University in Taiwan. He also was not involved with the study.

“However, contamination by circumstellar debris disks, which mimic Dyson Sphere infrared signatures, remains a concern,” he added in an email. “Authors argue that the debris disks around (dwarf stars) are rare, but the 7 candidate authors selected out of 5 million sources are also rare. Despite this, the seven candidates warrant further investigation with powerful telescopes for a more definitive evaluation.”

Anonymous

Donaldutemn

02 May 2025 - 12:07 pm

Water and life
Ethereum Mixer
Lightning is a dramatic display of electrical power, but it is also sporadic and unpredictable. Even on a volatile Earth billions of years ago, lightning may have been too infrequent to produce amino acids in quantities sufficient for life — a fact that has cast doubt on such theories in the past, Zare said.

Water spray, however, would have been more common than lightning. A more likely scenario is that mist-generated microlightning constantly zapped amino acids into existence from pools and puddles, where the molecules could accumulate and form more complex molecules, eventually leading to the evolution of life.

“Microdischarges between obviously charged water microdroplets make all the organic molecules observed previously in the Miller-Urey experiment,” Zare said. “We propose that this is a new mechanism for the prebiotic synthesis of molecules that constitute the building blocks of life.”

However, even with the new findings about microlightning, questions remain about life’s origins, he added. While some scientists support the notion of electrically charged beginnings for life’s earliest building blocks, an alternative abiogenesis hypothesis proposes that Earth’s first amino acids were cooked up around hydrothermal vents on the seafloor, produced by a combination of seawater, hydrogen-rich fluids and extreme pressure.
Yet another hypothesis suggests that organic molecules didn’t originate on Earth at all. Rather, they formed in space and were carried here by comets or fragments of asteroids, a process known as panspermia.

“We still don’t know the answer to this question,” Zare said. “But I think we’re closer to understanding something more about what could have happened.”

Though the details of life’s origins on Earth may never be fully explained, “this study provides another avenue for the formation of molecules crucial to the origin of life,” Williams said. “Water is a ubiquitous aspect of our world, giving rise to the moniker ‘Blue Marble’ to describe the Earth from space. Perhaps the falling of water, the most crucial element that sustains us, also played a greater role in the origin of life on Earth than we previously recognized.”

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02 May 2025 - 11:37 am

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Anonymous

Carlosvab

02 May 2025 - 09:55 am

Water and life
Eth Mixer
Lightning is a dramatic display of electrical power, but it is also sporadic and unpredictable. Even on a volatile Earth billions of years ago, lightning may have been too infrequent to produce amino acids in quantities sufficient for life — a fact that has cast doubt on such theories in the past, Zare said.

Water spray, however, would have been more common than lightning. A more likely scenario is that mist-generated microlightning constantly zapped amino acids into existence from pools and puddles, where the molecules could accumulate and form more complex molecules, eventually leading to the evolution of life.

“Microdischarges between obviously charged water microdroplets make all the organic molecules observed previously in the Miller-Urey experiment,” Zare said. “We propose that this is a new mechanism for the prebiotic synthesis of molecules that constitute the building blocks of life.”

However, even with the new findings about microlightning, questions remain about life’s origins, he added. While some scientists support the notion of electrically charged beginnings for life’s earliest building blocks, an alternative abiogenesis hypothesis proposes that Earth’s first amino acids were cooked up around hydrothermal vents on the seafloor, produced by a combination of seawater, hydrogen-rich fluids and extreme pressure.
Yet another hypothesis suggests that organic molecules didn’t originate on Earth at all. Rather, they formed in space and were carried here by comets or fragments of asteroids, a process known as panspermia.

“We still don’t know the answer to this question,” Zare said. “But I think we’re closer to understanding something more about what could have happened.”

Though the details of life’s origins on Earth may never be fully explained, “this study provides another avenue for the formation of molecules crucial to the origin of life,” Williams said. “Water is a ubiquitous aspect of our world, giving rise to the moniker ‘Blue Marble’ to describe the Earth from space. Perhaps the falling of water, the most crucial element that sustains us, also played a greater role in the origin of life on Earth than we previously recognized.”

Anonymous

Jasonliaky

02 May 2025 - 07:43 am

?get link # **Free Windows Subnet Scanner for Vulnerability Detection: Development and Download Options** ## **Introduction** Network security is a critical concern for IT professionals, and identifying vulnerabilities within subnets is essential for maintaining a secure infrastructure. A subnet scanner is a powerful tool that helps administrators detect open ports, misconfigurations, and potential security flaws across networked devices. For Windows users, several free and open-source subnet scanners are available, allowing both security professionals and developers to analyze networks and contribute to tool improvements. This article explores a free Windows-compatible subnet scanner capable of vulnerability detection, its key features, and how developers can extend its functionality. ## **Top Free Subnet Scanners for Windows** ### **1. Advanced IP Scanner** Developed by Famatech, **Advanced IP Scanner** is a lightweight yet powerful tool for scanning local networks. It provides: - Fast detection of connected devices. - Remote access via RDP and SSH. - Exportable scan reports in CSV format. While not a dedicated vulnerability scanner, it helps identify active hosts for further analysis. ### **2. Angry IP Scanner** **Angry IP Scanner** is an open-source tool that scans IP ranges and ports. Key features include: - Cross-platform compatibility (Windows, Linux, macOS). - Plugin support for extended functionality. - Export results to multiple formats (TXT, CSV, XML). Developers can modify its Java-based code to integrate custom vulnerability checks. ### **3. Nmap (Windows Version)** **Nmap** (Network Mapper) is the industry-standard tool for network discovery and security auditing. The Windows version offers: - Comprehensive port scanning and OS detection. - Scriptable vulnerability checks via NSE (Nmap Scripting Engine). - Integration with tools like Metasploit for penetration testing. Nmap is open-source, allowing developers to write custom scripts for subnet analysis. ### **4. SoftPerfect Network Scanner** This free tool provides advanced scanning capabilities, including: - Detection of shared folders and weak passwords. - Wake-on-LAN and remote shutdown support. - Customizable scan profiles. Though the free version has limitations, it remains useful for subnet analysis. ## **Developing a Custom Subnet Scanner** For developers interested in creating or modifying a subnet scanner, the following approaches can be taken: ### **1. Using Python with Scapy** Python’s **Scapy** library allows for custom packet crafting and network scanning. A basic subnet scanner can be built with: ```python from scapy.all import ARP, Ether, srp def scan_subnet(target_ip): arp = ARP(pdst=target_ip) ether = Ether(dst="ff:ff:ff:ff:ff:ff") packet = ether/arp result = srp(packet, timeout=3, verbose=0)] devices = for sent, received in result: devices.append('ip': received.psrc, 'mac': received.hwsrc) return devices print(scan_subnet("192.168.1.0/24")) ``` ### **2. Extending Nmap with Custom Scripts** Nmap’s **NSE (Nmap Scripting Engine)** allows developers to write Lua-based scripts for vulnerability detection. Example scripts can be found in Nmap’s official repository. ### **3. Building a GUI Scanner in C#** For a Windows-native solution, developers can use **C#** with .NET libraries to create a subnet scanner with vulnerability checks. Libraries like **SharpPcap** enable packet capture and analysis. ## **Conclusion** Free subnet scanners like **Nmap, Angry IP Scanner, and Advanced IP Scanner** provide robust network analysis capabilities for Windows users. Developers can further enhance these tools by contributing to open-source projects or building custom solutions using Python, Lua (NSE), or C#. By leveraging these tools, security professionals can efficiently detect vulnerabilities, secure networks, and prevent potential breaches. For those interested in development, modifying existing scanners or creating new ones offers valuable learning opportunities in cybersecurity. **Download Links:** - (https://nmap.org) - IP Scanner](https://

Anonymous

Jamesunfig

02 May 2025 - 06:59 am

Зачем делать переписывание статей из The New York Times с использованием простых слов и коротких предложений, и как это влияет на понимание и интересование читателями более сложных тем?

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Anthonylaw

02 May 2025 - 03:23 am

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Alexisoxism

01 May 2025 - 07:04 pm

Richard Durand устроил настоящее шоу! В зоне арт-объектов видел фантастические световые инсталляции.

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01 May 2025 - 05:40 pm

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01 May 2025 - 02:26 pm

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