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shuaixin.cc Personal Blog

website·Indexed 32 days ago

https://shuaixin.cc

A personal knowledge base and blog by Shuai (劉昕), an MIS/Software Engineer and former physical therapist. The site features a diverse collection of study notes, book reviews, and technical guides covering topics such as Home Assistant, Google Analytics 4, digital music production, financial independence, and linguistics.

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What's inside shuaixin.cc

  1. Overview of AppArmor and Access Control models

    AppArmor is a Linux kernel security module used to restrict programs' capabilities. It relates to two primary access control models: DAC (Discretionary Access Control) and MAC (Mandatory Access Control). In security certification contexts (like CC), RBAC (Role-Based Access Control) is a common implementation pattern for managing these permissions.

  2. Overview of Home Assistant Community Store (HACS)

    HACS (Home Assistant Community Store) is a community-driven store that allows users to install custom plugins developed by the community. It is essential for integrating third-party devices (such as Xiaomi/Mi Home devices and Zigbee devices) and bridging devices into Apple Home. A GitHub account is required for the installation and authorization process.

  3. Overview of 'Who’s in Charge? Free Will and the Science of the Brain'

    This book by Michael S. Gazzaniga explores the relationship between brain science and free will. The central thesis is that while we live in a deterministic universe governed by physical laws, the mind (created within the brain) can conversely constrain the brain. It argues that consciousness is an emergent property of a complex system rather than the result of a single central controller.

  4. Overview of the song '強者我朋友的質問信'

    The song '強者我朋友的質問信' is a critical reflection on faith and divine justice, questioning why those who work hard and remain honest often struggle while others succeed through shortcuts. It is designed to resonate with people who have put in immense effort but have not received fair rewards.

  5. Overview of the two stages of military training at Jinliujie

    The four-month military training service is divided into two distinct phases:

    1. First Stage (First Month): Focuses on 'New Soldier' training and passing the 'Assessment' (鑑測). This period is the busiest due to adapting to the schedule and environment. Note that assessment results generally do not affect the probability of being called for reserve training (教召).
    2. Second Stage (Remaining Three Months): Trainees are upgraded to 'Trainees' (訓員). This phase is significantly more relaxed with more free time. Trainees may be reshuffled into different companies within the same battalion.

  6. Overview of Dawarich as a Google Timeline alternative

    Dawarich is an open-source, self-hosted alternative to Google Timeline. It allows users to collect GPS location data via a mobile device and send it directly to their own server, eliminating the need to share location history with Google. Key features include a web interface, a mobile-friendly view, a 'Poster Studio' for creating custom trajectory posters, and data insights such as activity time analysis.

  7. Overview of 'The Last Life Chinese Class' (上一堂人生國文課)

    This book, written by Teacher Yangmie (羊咩老師) and published by Yuanliu (遠流) in 2022, reimagines the high school Chinese literature curriculum as a way to 'preview life.' The author connects classical Chinese texts with modern movies, dramas, anime, and music to make ancient wisdom accessible and relevant to contemporary students and adults, focusing on themes of fate, choice, pain, and resilience.

  8. Understand the Illusion of Knowledge and Memory Indexing

    The 'illusion of knowledge' occurs because humans often store only the 'index' of knowledge rather than internalizing the information itself. We rely on external storage systems to supplement our memory: the physical body (biological markers/instincts), the external environment (environmental cues), and other people's minds. The hippocampus acts as an indexing master rather than a storage master, leading people to believe they know more than they actually do because the retrieval process feels natural.

  9. Hardware requirements for Home Assistant OS (x86-64)

    To run Home Assistant OS on a PC or laptop, the device must have an x86-64 architecture. Hardware performance should be better than a Raspberry Pi 3B. Low-power devices like the HP T520 Flexible or Acer Switch 10 are confirmed to be functional for this purpose.

  10. Apply fundamental investment principles for capital growth

    Investment is a 'mirror world' where luck often outweighs skill. To invest successfully:

    • Capital vs. Funds: Funds only become capital when they possess three elements: Wisdom > Time Horizon > Amount. Use 'idle money' (money with no immediate need) to ensure a long time horizon.
    • Risk Management: Never bet everything on a single opportunity. Use the Kelly Criterion to determine the optimal size of a bet based on the probability of winning.
    • Safe Strategy: Use 'Dollar Cost Averaging' (DCA/定投) into growth-oriented assets.
    • Growth Rate: Focus on the 'growth of the growth rate' (accelerating growth) rather than a fixed growth rate.
    • Time Horizon: Define 'long term' as the time it takes for the principal to double twice. Use the 'Rule of 72' to calculate this (e.g., an 8% annual return doubles the principal every 9 years, making the 'long term' 18 years).

  11. Understand the paradox of productivity and time management

    Modern productivity anxiety often stems from the false belief that it is possible to 'complete' all tasks or absorb all information. The core realization is that tasks are inherently infinite and cannot be fully completed. Accepting this limitation changes one's perspective on life and the attitude toward using time, shifting the focus from optimizing efficiency to accepting the necessity of choosing and abandoning certain paths.