Merge pull request #255 from shiba24/update-sshiba-2023-2

Update README: Ph.D. thesis

README.md

@@ -3022,6 +3022,10 @@ Ph.D. Thesis, University of Adelaide, Adelaide, Australia, 2022.
 - <a name="Chamorro22Phd"></a>Chamorro, W. O.,  
 *[Event-based Simultaneous Localization and Mapping](https://www.iri.upc.edu/thesis/show/136)*,  
 Ph.D. Thesis, Universitat Politècnica de Catalunya, Barcelona, Spain, 2023. [PDF](http://www.iri.upc.edu/people/cetto/William_thesis/Chamorro_phdthesis.pdf)
+- <a name="Shiba23Phd"></a>Shiba, S.,  
+*[Estimating motion with an event camera](https://koara.lib.keio.ac.jp/xoonips/modules/xoonips/detail.php?koara_id=KO50002002-20236069-0003)*,  
+Ph.D. Thesis, Keio University, Tokyo, Japan, 2023. [PDF](https://koara.lib.keio.ac.jp/xoonips/modules/xoonips/download.php/KO50002002-20236069-0003.pdf?file_id=174804)
+
 
 <a name="theses-master"></a>
 ## Master's (and Bachelor's) Theses