Sunday, April 24, 2022

043022 Cognitive Hierarchies in Extensive Form Games

Title:
Cognitive Hierarchies in Extensive Form Games

Speaker:
林伯軒 (Po-Hsuan Lin), PhD student, Caltech

Time:
04/30/2022 01:00 PM PDT
04/30/2022 02:00 PM MDT
04/30/2022 03:00 PM CDT
04/30/2022 04:00 PM EDT
05/01/2022 07:00 AM BST
05/01/2022 10:00 PM CEST
05/01/2022 04:00 AM Taiwan


Keywords:
 Economics, Behavioral Game Theory, Experimental Economics, Cognitive Hierarchy, Extensive Form Games, Learning, Centipede Game


Abstract:
  The cognitive hierarchy (CH) approach posits that players in a game are heterogeneous with respect to levels of strategic sophistication. A level-k player believes all other players in the game have lower levels of sophistication distributed from 0 to k-1, and these beliefs correspond to the truncated distribution of a “true” distribution of levels. We extend the CH framework to extensive form games, where these initial beliefs over lower levels are updated as the history of play in the game unfolds, providing information to players about other players’ levels of sophistication. For a class of centipede games with a linearly increasing pie, we fully characterize the dynamic CH solution and show that it leads to the game terminating earlier than in the static CH solution for the centipede game in reduced normal form.

Wednesday, April 20, 2022

042422 以跨文化溝通為導向的華語教材設計

Title:
以跨文化溝通為導向的華語教材設計

Speaker:
李黛颦 (Tai-Ping Lee), PhD Student at NTNU, Visiting Scholar at Indiana University

Time:
04/24/2022 05:00 AM PDT
04/24/2022 06:00 AM MDT
04/24/2022 07:00 AM CDT
04/24/2022 08:00 AM EDT

04/24/2022 01:00 PM BST
04/24/2022 02:00 PM CEST
04/24/2022 08:00 PM Taiwan



Keywords:
  華語二語教學 Teaching Chinese as a second language , 跨文化溝通Intercultural Communication,華語學習教材設計Material Development for Teaching Chinese as a Second Language, 華語教學史Early Chinese Teaching/Learning History, 跨文化溝通Intercultural Communication, 華語教學Teaching Chinese as a second language, 教材設計Textbook Design

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Abstract:
        二語學習除了主要的目標語(target language)語言本體的學習,也應學習目標語的文化(target language culture)。因為跨文化的溝通交際是立基於語言和文化的理解,缺乏任何一項,都可能造成溝通交際的阻礙或誤解。  
        有別於一般華語教材以語言本體為主要學習目標,本文以目標語地--臺灣的外籍生跨文化溝通的需求為教材設計的依據,採用質化分析與文獻探討的方式,收集真實情境中的交際障礙案例,並依據跨文化溝通能力指標,設計以跨文化溝通為導向的華語教材。並在海外針對華語二語學習者提供教材分享,探討如何能透過這套教材,即早預知和理解可能面對因為文化差異所造成的困難,達到與台灣人得體溝通交際的目的。


Sunday, April 10, 2022

041622 熱帶大氣和颱風的簡化模型

Title:
熱帶大氣和颱風的簡化模型

Speaker:
簡睦樺 (Mu-Hua Chien), Ph.D. student, Courant Institute of Mathematical Sciences, NYU

Time:
 Taipei, Taiwan Sun, Apr 17, 2022 at 9:00 am CST
 Los Angeles, USA Sat, Apr 16, 2022 at 6:00 pm PDT
 Boulder, USA Sat, Apr 16, 2022 at 7:00 pm MDT

 Dallas, USA Sat, Apr 16, 2022 at 8:00 pm CDT
 Ann Arbor, USA Sat, Apr 16, 2022 at 9:00 pm EDT
 Berlin, Germany Sun, Apr 17, 2022 at 3:00 am CEST



Keywords:
     Applied Mathematics, Atmospheric Sciences, Moist Convection, Tropical Cyclones, Fluid Dynamics, Fluid Dynamics, Computational Fluid Dynamics, Atmospheric Dynamics, High Performance Computing, Moist Convection, Tropical Cyclone

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Abstract:
        熱帶大氣在氣候變遷下的改變,會直接的影響極端天氣事件出現的機會,並對我們的生活造成影響。儘管熱帶大氣已經被研究超過百年,仍然存在許多不確定因素,其中水氣為主要的來源。本次演講將介紹熱帶大氣的動力、熱力結構和平衡狀態,以及對流產生的條件和扮演的角色,並利用簡化的狀態方程式來進行數學建模。在我們的模型中,簡化了水氣相變的潛熱釋放,並重建熱帶大氣中扮演重要角色的條件不穩定大氣,意即未凝結的空氣塊是對流穩定;而凝結的空氣塊是對流不穩定的。在模擬中,我們找到類似颱風的渦旋,代表許多過去文獻中形成颱風的條件可能是非必要,值得我們更深入去瞭解物理過程在熱帶大氣中所扮演的角色。

Sunday, April 3, 2022

040922 How Imprecise Channel Knowledge Can Affect the Fundamental Limits of Wireless Network

Title:
 How Imprecise Channel Knowledge Can Affect the Fundamental Limits of Wireless Network

Speaker:
 詹曜嘉(Yao-Chia Chan), PhD Candidate, University of California, Irvine

Time:
 04/09 (Sat.) 7:00 pm PDT, 8:00 pm MDT, 9:00 pm CDT, 10:00 pm EDT
 04/10 (Sun.) 4:00 am CEST, 10:00 am Taiwan
 Time zone conversion tool

Keywords:
  Electrical Engineering, Telecommunications and Networking/Information Theory, 傳送端通道狀態資訊(Channel State Information at Transmitters), 網路容量(Network Capacity), 廣義自由度(Generalized Degress of Freedom), 廣播通道(Broadcast Channels), 極網理論(Extremal Network Theory)

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Abstract:
        今日無線網路能同時不間斷傳輸影音給多人,仰賴有效管理無線訊號干擾。訊號經傳播而衰減扭曲,若在傳送端事先知道傳播效果,便可調整傳輸方式,減低網內互打的干擾,提升網路傳輸效能。傳播效果又稱「通道狀態資訊」(Channel State Information),資訊失真程度如何影響效能極限,是近二十年來網路消息理論焦點課題之一。
        在本次分享中,我將介紹此課題近 五年來之突破。首先以有線傳輸通道為例,介紹消息理論的分析架構、效能極限,以及其為現代無線網路之發展所帶來之影響。接著延伸至無線網路,介紹其在完整通道狀態資訊下,效能極限之部分成果與待解問題。最後介紹通道資訊失真下,近五年學界研究成果:若資訊精度略有不足,無線網路之效能極限與完整資訊相比,存在巨大差異;我們利用分析上述問題而發展的「對齊映像不等式」(Aligned Image Bounds),進一步量化在通道資訊精度不足下,大型網路的效能極限。