Tag, Benjamin

ターク, ベンヤミン

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論文審査の要旨および担当者 
報告番号 甲	 第	 	 	 号 氏	 名 	 Benjamin Tag 
論文審査担当者
： 
 慶應義塾大学准教授 Kai Kunze (Dr. rer. nat.)	
 副査 慶應義塾大学教授 中村	 伊知哉		博士（政策・メディア） 
 副査 慶應義塾大学教授 Matthew	Waldman 
 副査 DFKI	Kaiserslautern,Prof.	Andreas	Dengel	(Dr.rer.nat.)	
  	
（論文審査の要旨)  
 
The thesis is on the topic of cognitive state assessments in the Wild (real world environments). The work 
presented by the candidate focuses on developing unobtrusive sensing approachs, that allow for continuous 
cognitive state assessment in everyday life.  
 
Mr. Benjamin Tag presents several studies where he collects psychophysical signals from a smart eyewear 
equipped with sensors for measuring eye movement and eye blink. He also applies infrared cameras and sensor to 
obtain measurements of changing facial temperature. His goal is to automatically infer states of alertness, 
sustained attention, and cognitive engagement with unobtrusive wearables allow for the development of new 
adaptive user interfaces and a new direction of cognitive activity recognition.  
 
Overall, his contributions are strong in technical terms (cognitive state sensing, algorithms, user studies) as well as 
in the design area (discussing alternative approaches, potential use cases, applications and guidelines for 
technology usage). 
The thesis is clearly structured and easy to follow. Chapter 1sets the motivation, foundation and related work. 
Chapter 2 goes into details which physiological signals are used and why for the alertness and cognitive load 
studies. Chapter 3 is then the main content, describing several studies related to facial thermography and EOG 
based blink detection and fatigue recognition.  
 
The thesis draft needed a little improvement in clarity and description. As fatigue and alertness measurements are 
well established in psychology a more in-depth discussion and comparison to those methods is required: making 
clear the advantages and uniqueness of his approach. Another small change involves the thermal studies presented 
in the paper, here Mr. Benjamin Tag could answer perfectly the reasons and rational behind the studies and their 
consecutive order, yet the draft was still lacking. The revised thesis version already addresses both points and 
contains an extended comparison to traditional approaches as well as a better rational for the thermal studies. 
 
The thesis underlines that Mr. Benjamin Tag has exceptional academic skills. From his work it is visible that it 
takes him very little time to absorb new knowledge and apply it. Although his background is linguistics, the work 
he presents in his thesis is well published in the computer science fields of ubiquitous computing and human 
computer interaction. Most astonishingly, he was able to publish the major results of his thesis at The ACM CHI 
Conference on Human Factors in Computing Systems 2019. CHI is the premier international conference of 
Human-Computer Interaction with acceptance rates under 20 %. This shows away from other contributions the 
impact the thesis has. The thesis contributions are well published with over 12 paper publications (2 full papers), 
this in addition to the very positive reception of the thesis from the review committee shows the value and impact 
of the work in several academic fields. 
 
 
 


Cognitive state assessments through monitoring physiological signals on the face (審査報告)

http://koara.lib.keio.ac.jp/xoonips/modules/xoonips/download.php?koara_id=KO40001002-20185047-0001

Cognitive state assessments through monitoring physiological signals on the face (審査報告)

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