I was deeply saddened to hear about Ting-Ning’s passing away.  A totally devastating shock.

Ting-Ning’s smiles touched everyone who had the honor to be his friends. we felt his intellectual wisdom thru his smiles when he talked. he was always positive towards others, his signature humors will forever be remembered and cherished by those who knew and loved him — his friends, his students, his colleagues, and his dear family.

He will be forever in our heart, a person who was widely admired, respected and missed. I know he is in heaven now, because he brought sunshine to those around him.

Cathy

老師的笑容

          —永懷李定寧教授

2023.04.21，驚聞李老師已經在2023.02.14逝世，心情無比悲痛。與老師在一起的點點滴滴，都浮現在眼前，都是那麼清晰，一切都徬佛就在昨天。

唸研究所時，在GWU的Academic Center 教室聽我們學校控制學的大師李老師講座，清晰地記得李老師面帶笑容，以豪邁的聲音講解ALOHAnet，課堂上，他還一直鼓勵我們學生，要時時注意科技的發展，不要只注重在課本上的學問，特別是來自其他國家的學生，感覺上是在對我說的。李老師總是微笑面對著我，孜孜不倦教導我。每當我想起課堂上老師的笑容，總能想起來老師講課的樣子，和他孜孜不倦的鼓勵！

在GWU生活期間，每當學術研究上碰到瓶頸時，或是研究論文有壓力時，我都會去他的辦公室傾訴，李老師總是面帶笑容，跟我說：「Charles，你現在所面臨的挑戰是正常的，博士生的訓練是讓你有能力看懂每一本書，解決每一個困難，甚至面對你的未來人生也是一樣的！」每次跟老師傾訴之後，人生就好像重新充電，正面的迎向您的未來。

畢業之後，老師也非常關心我的工作和家庭生活，有好幾次都和師母來我家看看和聊天，重要節日時也會邀請我們去老師家過節。我們的關係是師生，但情同父子。對於老師，心中有無限的懷念和感恩，謝謝您．．

謝謝老師您的辛勞，塑造我們的靈魂工作是偉大的，紅燭的燃燒是短暫的，照亮我們的心卻是永恆的。

懷念老師的傳道，不僅僅在於傳授我們的科學文化知識，更在於給我們樹立了一個做人的典範。

感謝老師在人生上的鼓勵，您讓我們在美國生活更有自信的，鼓勵我們要超越自我。您的笑容告訴我們：學習並不是一種負擔，而是一種快樂和責任。您的笑容像是一把通向我們從未知道的天地的鑰匙，鼓勵我們用自己的頭腦和雙手大膽探索，去尋找和發現，讓生活充滿驚喜!

永懷師恩

Professor Lee will be in our hearts forever

Professor’s Smile

In Memory of Professor Ting Ning Lee

On April 21, 2023, I was deeply shocked to hear untimely demise of Professor Lee on February 14, 2023. I felt extremely sad not only the GWU has lost a great scholar, but also I lost my teach. The bits and pieces of being with Professor are all in front of my mind, so clear, everything seems just to be yesterday.

When I studied at GWU, I took the lectures from Professor Lee, the Master of Control Theory at GWU, in the Academic Center classroom. I clearly remember that Prof. Lee explained ALOHAnet in a lower speaking voice. He always asked us to pay attention to the development of science and technology from time to time, and don't just focus on the knowledge in textbooks, especially for those students from other countries, it feels like he was just talking to me. Whenever I think of Professor’s smile in class, it always remind me his passionate teaching and his endless encouragement!

During my student life at GWU, whenever I encountered bottlenecks in academic research or when my research works were under pressure, I would go to his office to talk to him. Professor Lee always smiled and said to me: "Charles, he challenges and difficulties you have now are normal, and the training for doctoral students is to enable you to read and understand every book, solve every difficulty you may have, and even give you skills to face your future life!" Every time I talk to you, it seems to be recharged and I am able to face positively.

After graduation, Professor Lee also concerned my work and family very much. You visited us several times, and we also chatted on phone frequently. We were also invited to your house for important festivals. Our relationship is that of teachers and students, but we are like father and son. For You, I have infinite nostalgia and gratitude in my heart, thank you. ．

Thank you, teacher, for your hard work. The work of shaping our souls is great. The burning of a red candle is short-lived, but it is eternal to illuminate our hearts.

Missing the teacher's preaching is not only to impart our scientific and cultural knowledge, but also to set a model for us to be a human being.

Thank you teacher for your encouragement in life. You have made us more confident in living in the United States and encouraged us to surpass ourselves. Your smile tells us: learning is not a burden, but a joy and responsibility. Your smile is like a key to the world we have never known, encouraging us to use our minds and hands to explore boldly, to seek and discover, and to make life full of surprises!

Forever cherishing teacher's kindness

Professor Lee will be in our hearts forever

師母您好，

我是明愷。收到李老師去世的消息，心理非常的難過和震驚。請師母務必保重身體。也非常遺憾和難過的是去年帶家人去DC，原預定拜訪李老師和師母，因李老師當時身體不是很好，師母婉拒而沒能成行，只能請斯老師代為轉達問候之意。原想說等李老師身體康復後再來拜訪，當面向老師表達問候和謝意。  没想到當時的決定，竟然成為一個無法實現的遺憾。

回憶起當初在GWU求學唸書，李老師對所有的學生都非常的照顧，教學的品質更是系上之最。李老師在教學和專業課程的素養之深厚，另人印象深刻。尤其是每次上課，老師從不需要看書或材料，卻能將非常複雜的數學原理和公式推導出來讓台下學生理解，大師風範，實至名歸！

除了教書育人，李老師在課堂外，知道留學生的經濟難處，對台灣和大陸來的留學生都時常的照顧，私下也請我們多次聚餐。不論是課業內或課業外的問題，也會盡力協助，給予指導。我當時前後屆的博士班同學們不論是台灣來的同學例如旭誠，家彬，或是大陸來的博微，謙一都非常的感謝李老師當時的照顧。

做為李老師的博士班學生，我滿懷感激老師當年的學術指導，更是感念和老師相處時老師的氣度胸懷和從老師所學到的待人接物，對我是一輩子的財富。「師者 所以傳道、受業、解惑也。」，老師是當之無愧！

既使老師已然故去，但老師在他的家人中，朋友中，同儕中，和所有老師的學生心中，老師的形象仍然是非常鮮明的。老師的行為和準則仍然是在無時無刻的影響他所相處過的每一位。在我難過的同時，不禁想到一句話-「有些人死了，但他還活著」！

請師母節哀順變，珍重身體。若有需要協助，請務必讓我和蓮美知道，讓我們盡一份力。

明愷 和蓮美

He was and will be shining in my heart with his kind smile forever. I, as a professor in Korea, just hope to do the same teaching to my students.

RIP, Prof. Lee...my Teacher.

驚悉老同學定寧兄突然離世的消息, 實在不敢相信, 也無法接受!

新冠疫情爆發前,內人與我曾藉去華府看望女兒全家之便, 連絡上了久居馬里蘭州的定寧兄嫂, 他們特地在一家高級洋餐舘請我們吃了一頓豐盛的晚餐, 老同學多年未見, 席間相談甚歡, 我們兩家各住美國東西兩岸, 很難見上一面, 豈不知, 那一頓難得的聚會, 竟成了我們最後的晚餐, 不勝唏噓!!

我們倆人, 在成大是同屆同系但不同班, 他是出名用功的好學生, 雖沉默寡言, 他那出眾的高個兒,很難不被注意到, 加上在籃球場上, 精湛的球技和細膩的動作, 立刻被網羅成為校隊的一員, 可是他個性低調, 就以功課繁忙為由, 並未積極參與, 對成大可是一大损失. 不過, 並未改變他對籃球的熱愛, 與他在球場上也常見面, 身高與球技, 我們倆雖有很大一段距離, 跳跳蹦蹦, 活動筋骨, 汗流夾背再加上喜喜哈哈, 就已達到了運動的目的. 你們或許並不知道, 他也是位桌球高手, 並且他的傑出基因, 遺傳給了他的一雙兒女, 他們在年青時, 曾是國家培植的桌球運動員.

不僅如此, 定寧兄還積極推廣地區桌球運動和熱心參予各項義工服務. 我頗以能身為他的同學為榮！👍👍

我們在1962年畢業的暑假, 這些男生們, 都得履行一年的預備軍官役, 我們倆人和多位同學被分發到海軍,在左營的海軍官校接受了 三個月專科教育後,就要開始九個月的少尉軍官生涯, 我是既暈車又暈船的, 在分發前夕, 徹夜難眠, 真是感謝上帝, 居然被分發到基隆海軍軍區司令部, 任職電子修護官, 非常慚愧的, 我是號稱海軍, 並未上過一天船, 也可以說沒有吃過一天苦, 據我所知, 定寧兄和其他多位預備軍官被分發到登陸艦上服役, 常駐金門馬祖, 由於該艦是平底,便於登陸, 一旦遇到風浪, 勢必顛簸不堪, 對於暈船的人, 那就更是苦不堪言了.😥😅

在1966年, 定寧兄在去威斯康辛大學修讀博士前, 來到南加州舉世聞名的3M公司任職工程師, 我們曾有一段短暫的相聚, 那年九月, 蕩平與我在洛杉磯準備結婚, 正巧定寧兄買了一輛新車, 我也就毫不客氣的, 情商借用了他的新車做為囍車, 並且“借一加一”, 連帶車主也一併請來當了我們的 Chauffeur, 我們真是何其幸運! 🙏🙏

我們相識的友情, 超過了一甲子, 定寧兄的誠信待人, 相處的點點滴滴, 不一而足, 將永遠的存在我的心中, 永誌不忘!

老同學 陳尚毅

Dear Nancy,

It is so hard to accept the fact that Dr. T.N. Lee passed away and I just talked to him not that long ago after my back from a short trip to Taiwan.

I always remembered the good old days back in Madison where we study for our Ph. D degree in electrical engineering. we both went back to accept our degree celebrating ceremony where you met my parents.

Dr. Lee had a car and took us to a sea food restaurant regularly where we enjoyed all the shrimps we can eat, and the ice cream place run by the university food department.  He came to see me at the hybrid computer lab at the Engineering Research Building on the tenth floor with a beautiful view of the campus. I had a bicycle and can only stay on campus.

I went back to Madison to see Prof. Rideout when he was ill and bought one of his oil paintings of the Campus and later a trip for his burial services.  Professor Rideout came to Madison teaching in 1945 when I was born in mainland China.  Professor Rideout is very kind to me and offered me a job back to the department to wash out my mushroom smell order.  I regret now that I did not take the offer.

We met at DC and had to hide my dog, Lucy under the table for a Chinese restaurant meal that was the last time some years ago. 

I had a master's degree under Bernstein and Ph. D under Rideout and a MBA at business school during wonderful six years at Madison.  But self-employee unlike Dr. Lee teaches at a university in DC until retired.

I also took him to sailing with me on the lake several times afterward had a famous Madison pizza with beer.

I was planning on taking a train to DC and having a dinner with T N and you but it will always be a regret now.

Take a good care of yourself.

edward pao ping chang