開発スタッフがアプリ関連の最新技術やニュースをご紹介します。

今回はUnity VRの開発環境で、VIVE Eye Tracking SDK のセットアップをおこなう方法について紹介します。
以下の手順をおこなうことによりHTC VIVE Pro Eyeのアイトラッキング機能のセットアップおよび開発環境の構築をおこなうことが可能になります。

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Static IPをアタッチしたLightsailとLinuxが動作しているローカルPCをtailscaleのVPNで繋いで
手軽に固定IPを利用してみます。

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UUIDs, or Universally Unique Identifiers, are strings of characters used to uniquely identify information in computer systems. They play a crucial role in various applications, from databases to distributed systems. In this blog, we will explore the different versions of UUIDs, each designed for specific use cases and scenarios.

1. UUID Basics

Before delving into the versions, it’s essential to understand the basic structure of a UUID. A UUID is a 128-bit number typically represented as a 32-character hexadecimal string, separated by hyphens into five groups. The uniqueness of UUIDs is achieved by combining timestamps, node information, and random or pseudo-random numbers.

2. UUID Version 1: Time-based UUIDs

UUID version 1 is based on the current timestamp and the unique node (typically a MAC address) to ensure uniqueness. The timestamp component allows sorting and ordering of UUIDs based on their creation time. While effective, the reliance on a timestamp makes it less suitable for scenarios where privacy and security are top priorities.

3. UUID Version 2: DCE Security UUIDs

Version 2 is similar to Version 1 but includes additional information related to the POSIX UID/GID and POSIX timestamps. However, Version 2 is rarely used in practice, and Version 1 is more widely accepted.

4. UUID Version 3 and 5: Name-based UUIDs (MD5 and SHA-1)

These versions are generated by hashing a namespace identifier and a name using MD5 (Version 3) or SHA-1 (Version 5). The resulting hash is then combined with specific bits to form the UUID. While these versions ensure uniqueness within a given namespace, the use of MD5 and SHA-1 has raised security concerns due to vulnerabilities in these hashing algorithms.

5. UUID Version 4: Random UUIDs

Version 4 UUIDs are generated using random or pseudo-random numbers. This version prioritizes randomness over time-based information, making it suitable for scenarios where ordering is less critical, and privacy is a priority. The randomness is achieved through the use of a random number generator.

6. UUID Version 6: Modified Version 1

A newer addition, Version 6 combines the best of both Version 1 and Version 4. It includes timestamp information for ordering and randomness for improved security. This version is designed to address some of the privacy concerns associated with Version 1.

Conclusion

Understanding the different versions of UUIDs is essential for choosing the right type based on the specific requirements of your application. Whether you prioritize time-based ordering, security, or randomness, there’s a UUID version designed to meet your needs. As technology evolves, so do UUID specifications, ensuring that these unique identifiers continue to play a vital role in the ever-expanding digital landscape.

Asahi

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At Samsung’s latest launch event, the company unveiled its innovative Live Translation feature, a noteworthy addition to the AI-powered Galaxy S24 smartphone line. The Live Translation feature aims to enhance the calling experience by enabling users to make or receive calls in languages they do not speak, providing real-time audio and on-screen translations. Demonstrated during the Unpacked event, the technology showcased how users could effortlessly make a restaurant reservation in a foreign language, with the conversation seamlessly translated within the native Call app. This feature creates a personalized interpreter experience, emphasizing the convenience it brings to users.

Samsung’s Vice President of Product Management, Drew Blackard, likened the Live Translation feature to having a personal interpreter during phone calls. The technology is designed to support audio and text translations for up to 13 languages, ensuring a versatile and inclusive communication experience. Notably, all translation processes occur on the device itself, preserving the privacy of Samsung owners’ phone calls.

Furthermore, the Live Translation feature is designed to remember users’ language settings and the preferred language of each contact, streamlining communication for those engaging in frequent international calls or travel.

As part of this language-focused enhancement, Samsung is extending translation capabilities to the Samsung keyboard. Users can now directly translate words and phrases as they type, offering a dynamic language translation experience during text-based conversations. The keyboard’s language detection feature ensures a seamless translation process, proving useful not only for international communication but also for users comfortable communicating in their native language, even when conversing with others who speak the same language. This comprehensive language integration showcases Samsung’s commitment to leveraging AI for an improved and more accessible user experience.

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本記事は前回の「OpenAI GPT API(13) WebAppでの活用」の続きです。

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