https://www.youngju.dev/blog 천천히 올바르게. AI Researcher & DevOps Engineer Youngju's blog. GPU/CUDA, LLM, MLOps, Kubernetes AI workloads, and data engineering — plus mindset essays on confidence, routines, health, and sport psychology. ko fjvbn2003@gmail.com (Youngju Kim) fjvbn2003@gmail.com (Youngju Kim) Wed, 18 Mar 2026 00:00:00 GMT https://www.youngju.dev/blog/culture/2026-03-18-sports-routine-habit-psychology-developer.en https://www.youngju.dev/blog/culture/2026-03-18-sports-routine-habit-psychology-developer.en Rafael Nadal's water bottle ritual, Ichiro Suzuki's 3-hour pre-game preparation, and the martial arts concept of kata — why champions use pre-performance routines, and how developers can build their own to unlock focus, flow, and consistent excellence. Wed, 18 Mar 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) routinehabitsnadalichirosports-psychologydevelopergrowth https://www.youngju.dev/blog/mindset/choking-under-pressure.en https://www.youngju.dev/blog/mindset/choking-under-pressure.en Perfect in practice, broken in the real thing — choking under pressure is not a matter of talent or effort but a malfunction of the attention system. Starting from Jana Novotna at the 1993 Wimbledon final, this post looks at what choking really is, explains its two mechanisms (explicit monitoring and distraction), and shows how to apply the antidotes sports psychology has validated — pressure inoculation training, external focus, and process goals — to live demos, coding interviews, and incident response. Mon, 20 Jul 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) mindsetsports-psychologypressureperformanceconfidence https://www.youngju.dev/blog/mindset/choking-under-pressure.ja https://www.youngju.dev/blog/mindset/choking-under-pressure.ja 練習では完璧なのに本番で崩れてしまう現象、チョーキング（choking）は才能や努力の問題ではなく、注意システムの誤作動です。1993年ウィンブルドン決勝のヤナ・ノボトナの事例からチョーキングの実体を見て、明示的モニタリング理論と注意散漫理論という2つのメカニズム、そしてスポーツ心理学が検証してきた解毒剤（プレッシャー接種訓練、外的焦点、プロセスゴール）を、開発者のライブデモ、コーディング面接、障害対応の場面に適用する方法を整理します。 Mon, 20 Jul 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) mindsetsports-psychologypressureperformanceconfidence https://www.youngju.dev/blog/mindset/choking-under-pressure https://www.youngju.dev/blog/mindset/choking-under-pressure 연습에서는 완벽한데 실전에서 무너지는 현상, 초킹(choking)은 재능이나 노력의 문제가 아니라 주의 시스템의 오작동입니다. 1993년 윔블던 결승의 야나 노보트나 사례로 초킹의 실체를 보고, 실행 감시 이론과 주의 분산 이론이라는 두 가지 메커니즘, 그리고 스포츠 심리학이 검증해 온 해독제(압박 접종 훈련, 외적 초점, 프로세스 골)를 개발자의 라이브 데모, 코딩 인터뷰, 장애 대응 상황에 적용하는 방법을 정리합니다. Mon, 20 Jul 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) mindsetsports-psychologypressureperformanceconfidence https://www.youngju.dev/blog/mindset/choking-under-pressure.zh https://www.youngju.dev/blog/mindset/choking-under-pressure.zh 练习时完美无缺，上场却一败涂地——这种现象叫作窒息效应（choking），它不是天赋或努力的问题，而是注意系统的失灵。本文从1993年温布尔登决赛的亚娜·诺沃特娜说起，剖析窒息效应的真面目，讲清显性监控理论与注意分散理论这两种机制，并把运动心理学反复验证过的解药——压力接种训练、外部焦点、过程目标——应用到开发者的现场演示、编程面试和故障处理场景中。 Mon, 20 Jul 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) mindsetsports-psychologypressureperformanceconfidence https://www.youngju.dev/blog/mindset/confidence-is-a-skill.en https://www.youngju.dev/blog/mindset/confidence-is-a-skill.en The moment you believe confidence is a personality trait, you stop training it. Sports psychology treats confidence as a repeatable skill. This post covers the four sources of confidence in Bandura's self-efficacy theory, the mastery-experience design and self-talk training that world-class athletes actually use, and how to apply it all to a developer's daily life: interviews, presentations, and incident response. Mon, 20 Jul 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) mindsetconfidencesports-psychologyself-efficacyself-improvement https://www.youngju.dev/blog/mindset/confidence-is-a-skill.ja https://www.youngju.dev/blog/mindset/confidence-is-a-skill.ja 自信を性格だと信じた瞬間、訓練をやめてしまいます。スポーツ心理学は自信を反復可能なスキルとして扱います。バンデューラの自己効力感理論が示す自信の4つの源泉、世界的な選手が実際に使う成功体験の設計法とセルフトーク訓練、そしてそれらを開発者の日常(面接、発表、障害対応)に応用する方法までまとめました。 Mon, 20 Jul 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) mindsetconfidencesports-psychologyself-efficacyself-improvement https://www.youngju.dev/blog/mindset/confidence-is-a-skill https://www.youngju.dev/blog/mindset/confidence-is-a-skill 자신감을 성격이라고 믿는 순간 훈련을 멈추게 됩니다. 스포츠 심리학은 자신감을 반복 가능한 기술로 다룹니다. 반두라의 자기효능감 이론이 말하는 자신감의 4가지 원천, 세계적인 선수들이 실제로 쓰는 성공 경험 설계법과 셀프토크 훈련을 개발자의 일상(면접, 발표, 장애 대응)에 적용하는 방법까지 정리했습니다. Mon, 20 Jul 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) mindsetconfidencesports-psychologyself-efficacyself-improvement https://www.youngju.dev/blog/mindset/confidence-is-a-skill.zh https://www.youngju.dev/blog/mindset/confidence-is-a-skill.zh 当你相信自信是一种性格时，你就停止了训练。运动心理学把自信当作一项可重复的技能来对待。本文梳理了班杜拉自我效能感理论所说的自信的四大来源、世界级运动员实际使用的成功经验设计法和自我对话训练，以及如何把这一切应用到开发者的日常(面试、演讲、故障处理)之中。 Mon, 20 Jul 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) mindsetconfidencesports-psychologyself-efficacyself-improvement https://www.youngju.dev/blog/mindset/flow-state-engineering.en https://www.youngju.dev/blog/mindset/flow-state-engineering.en That stretch of total absorption where four hours felt like fifteen minutes was not luck — it was the product of specific conditions. This post walks through the three preconditions of flow that Csikszentmihalyi identified (clear goals, immediate feedback, challenge-skill balance), explains why the zone athletes describe and the deep work of developers are the same phenomenon, breaks down the cost structure by which context switching destroys immersion, and lays out a practical method for designing flow blocks into your day. Mon, 20 Jul 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) mindsetflowfocussports-psychologyproductivity https://www.youngju.dev/blog/mindset/flow-state-engineering.ja https://www.youngju.dev/blog/mindset/flow-state-engineering.ja 時間を忘れて没頭したあの最高の集中状態は、運ではなく条件の産物です。チクセントミハイが確立したフロー理論の3つの前提条件(明確な目標、即時フィードバック、挑戦とスキルのバランス)を整理し、アスリートの語る「ゾーン」体験と開発者のディープワークが同じ現象である理由、コンテキストスイッチングが没入を破壊するコストの構造、そして1日の中に没入ブロックを設計する実践的な方法をまとめます。 Mon, 20 Jul 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) mindsetflowfocussports-psychologyproductivity https://www.youngju.dev/blog/mindset/flow-state-engineering https://www.youngju.dev/blog/mindset/flow-state-engineering 시간 가는 줄 모르고 빠져들었던 최고의 집중 상태는 운이 아니라 조건의 산물입니다. 칙센트미하이가 정립한 플로우 이론의 3가지 전제 조건(명확한 목표, 즉각적 피드백, 도전-기술 균형)을 살펴보고, 운동선수들이 말하는 존 경험과 개발자의 딥워크가 같은 현상인 이유, 그리고 컨텍스트 스위칭이 몰입을 파괴하는 비용 구조와 함께 하루에 몰입 블록을 설계하는 실전 방법을 정리합니다. Mon, 20 Jul 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) mindsetflowfocussports-psychologyproductivity https://www.youngju.dev/blog/mindset/flow-state-engineering.zh https://www.youngju.dev/blog/mindset/flow-state-engineering.zh 那段忘记时间、完全沉浸其中的最佳专注状态,不是运气,而是特定条件的产物。本文梳理契克森米哈赖建立的心流理论的三大前提条件(清晰的目标、即时反馈、挑战与技能的平衡),解释为什么运动员口中的“进入状态”与开发者的深度工作是同一种现象,拆解上下文切换借由注意力残留摧毁心流的成本结构,并给出在一天之中设计心流区块的实战方法。 Mon, 20 Jul 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) mindsetflowfocussports-psychologyproductivity https://www.youngju.dev/blog/mindset/pre-performance-routines.en https://www.youngju.dev/blog/mindset/pre-performance-routines.en Ichiro's batter's box ritual, Nadal's water bottle alignment, a basketball player's free-throw dribbles. The motions the best athletes repeat are not superstition — they are science. This post looks at the psychological mechanisms by which pre-performance routines lift performance in tense situations (attentional control, uncertainty reduction, procedural memory activation), and lays out a three-step design method for transplanting them into a developer's day, from morning routines to deep-work start routines. Mon, 20 Jul 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) mindsetroutinesports-psychologyhabitsfocus https://www.youngju.dev/blog/mindset/pre-performance-routines.ja https://www.youngju.dev/blog/mindset/pre-performance-routines.ja イチローの打席ルーティン、ナダルのボトル整列、バスケットボール選手のフリースロー前のドリブル。一流選手が繰り返す動作は迷信ではなく科学です。プリパフォーマンスルーティンが緊張場面でパフォーマンスを引き上げる心理学的メカニズム(注意のコントロール、不確実性の縮小、手続き記憶の起動)を掘り下げ、朝のルーティンやディープワーク開始ルーティンなど、開発者の一日に移植する3ステップの設計法をまとめます。 Mon, 20 Jul 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) mindsetroutinesports-psychologyhabitsfocus https://www.youngju.dev/blog/mindset/pre-performance-routines https://www.youngju.dev/blog/mindset/pre-performance-routines 이치로의 타석 루틴, 나달의 물병 정렬, 농구 선수의 자유투 드리블. 최고의 선수들이 반복하는 동작은 미신이 아니라 과학입니다. 프리 퍼포먼스 루틴이 긴장 상황에서 수행을 끌어올리는 심리학적 메커니즘(주의 통제, 불확실성 축소, 절차 기억 활성화)을 살펴보고, 아침 루틴과 딥워크 시작 루틴 등 개발자의 하루에 이식하는 3단계 설계법을 정리합니다. Mon, 20 Jul 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) mindsetroutinesports-psychologyhabitsfocus https://www.youngju.dev/blog/mindset/pre-performance-routines.zh https://www.youngju.dev/blog/mindset/pre-performance-routines.zh 铃木一朗的打席例行动作、纳达尔的水瓶摆放、篮球运动员罚球前的运球。顶级选手反复做的动作不是迷信，而是科学。本文剖析赛前例行程序在紧张情境下提升表现的心理学机制(注意控制、减少不确定性、激活程序性记忆)，并整理出把它移植到开发者一天之中的三步设计法，涵盖晨间例行程序和深度工作启动程序等。 Mon, 20 Jul 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) mindsetroutinesports-psychologyhabitsfocus