Hello I'm Purbasha (she/her), a PhD student at the Department of CS in University of Kentucky, Lexington.
I'm also a member of Secure Decentralized Systems Lab, and advised by Professor Yang Xiao.
My research interests include decentralized systems and network security.
I previouly graduated from the Department of CSE, BUET and
worked as a lecturer(currently on study leave) in the Department of CSE, BRAC University.
Secure Decentralized Systems Lab
Department of Computer Science,
University of Kentucky, Lexington
August 2025 — PresentDepartment of Computer Science and Engineering,
BRAC University
June 2023 — PresentCourse Instructor:
(Summer 2023, Fall 2023, Spring 2024, Summer 2024) CSE 331: Automata and Computability
(Summer 2023, Fall 2023) CSE 230: Discrete Mathematics
(Summer 2023) CSE 111: Programming Language II Sessional
Undergraduate thesis project under the guidance of Dr. Rezwana Reaz. We propose a distributed state management system for network functions (NFs) that ensures dynamic and efficient flow and state migration between NFs. Our approach introduces three innovative mechanisms to enhance the performance of stateful NFs. First, we implement multithreaded NFs to accelerate packet processing and optimize resource use. Second, we propose a cluster-based state replication scheme to minimize bandwidth consumption during flow migration, with states continually replicated across cluster members to facilitate smooth migration without overloading the network. Finally, we present an enhanced cluster-based load balancing algorithm to evenly distribute load and prevent bottlenecks. These approaches work together to maintain global state consistency without relying on a central authority. Experimental results demonstrate that our system achieves faster processing and reduced state migration overhead compared to existing solutions.
Recent work with Salsabil Arabi and Adiba Shaira under the supervision of Dr. Tanzima Hashem. In this paper, we introduce a deep learning-based model to predict an individual's point of interest (POI) for meetups at a specific time, even without knowing the companions involved. By leveraging transformer blocks, our approach incorporates features such as individual visit preferences, companions' visit patterns, and historical meetup data derived from check-ins and friendship networks. We demonstrate that these features enable highly accurate POI predictions. Validation on the US-based Foursquare dataset shows that our model significantly outperforms current state-of-the-art baseline models. Currently, our manuscript is under review for publication at ACM TSAS.
University of Kentucky, Lexington
Advisor: Professor Yang Xiao
August 2025 — PresentBangladesh University of Engineering and Technology
April 2018 — May 2023CGPA: 3.68/4.00
Notable Courses:
| CSE405- Computer Security | CSE309- Compiler Design |
| CSE453- High Performance Database Systems | CSE321- Computer Networks |
| CSE471- Machine Learning | CSE313- Operating Systems |
| CSE409- Computer Graphics | CSE305- Computer Architecture |
| CSE411- Simulation and Modeling | CSE463- Introduction to Bioinformatics |
| MATH245- Statistics and Probability | MATH247- Linear Algebra |
Sylhet Govt. Women’s College
2015 — 2017CGPA: 5.00/5.00
- Board Talent Pool Scholarship
Blue Bird School and College, Sylhet
2003 — 2015CGPA: 5.00/5.00
- Board Talent Pool Scholarship
C/C++, Python, Java, Javascript, x86 Assembly, Bash
Docker, Django, NextJS, React, Tensorflow, Oracle DBMS, LaTeX
Sklearn, Pandas, Matplotlib, Seaborn
Visual Studio Code, Git
Tensorflow, Keras, Sklearn
Term Project for CSE 472: Machine Learning Sessional offered by the CSE Department of BUET. In this project, we aim to build a machine learning model that can identify the gender of a person from their voice recording. In the process, we use two intermediary data representation format of the audio clips- Mel Spectrogram (Mel) and Mel-Frequency Cepstral Coefficients (MFCC).
NS3
In this project, Simulation and implementation of a congestion control algorithm on two different topologies using NS3 - a network simulator. This was the term project for the CCSE 322: Computer Networks course offered by the CSE Department of BUET.
Numpy
A vectorized version of a Convolutional Neural Network using only numpy without any deeplearning frameworks. Training and testing of the developed model is done on the NumtaDB: Bengali Handwritten Digits dataset. This project is part of the final assignment of CSE 472: Machine Learning Sessional offered by the CSE Department of BUET. The final score was tested on a hidden dataset.
Video Demonstration View on Github
ExpressJS, Kubernetes, Docker, NAT Streaming Server, MongoDB
EventFly is an online event management platform where users can host and attend online or offline events based on the user preferences. This was the term Project for CSE 408: Software Development Sessional offered by the CSE Department of BUET.
Django, Oracle SQL
Cycloan is a ride sharing platform where users can put up their cycles for renting it to others and vice versa. The motive behind this project was to design a RDBMS based system on using only raw SQL queries. This was the term project for the CSE 216: Database Management System Sessional course offered by the CSE Department of BUET.
Flex, Bison
A compiler for subset of C language is made from scratch using flex and bison. This assignments are for the CSE 310: Compiler Sessional course offered by the CSE Department of BUET.
Logisim - Java Platform (Version 2.7.1)
Designed 8-bit MIPS from scratch and introduced pipelined execution using Logisim simulator. This assignments are for the CSE 306: Computer Architecture Sessional course offered by the CSE Department of BUET.
xv6 Operating System
Developed the paging framework of xv6 operating system, as well as implementing many other functionalities of the operating system.
Graphics, OpenGL
Followed by implementation of the raster based graphics pipeline, implemented ray tracing using OpenGL. This was the term project for the CSE 410: Computer Graphics Sessional course offered by the CSE Department of BUET.
This scholarship is granted to undergraduate students for their academic excellence.
2nd Runner-up at National Mathematical Olympiad
2017Participant at International Mathematical Olympiad Team Selection Camp
2015, 2016Participant at National Mathematical Camp
2014, 2016Participant at Special Mathematical Camp
2015BUET CSE FEST 2022
June 2022 - August 2022 [Visit Our Facebook Page]Coordinated several inter-university competitions such as hackathon, programming contest, deep learning competition, AI contest; as well as cultural programs on behalf of the graduating class.
Tutored many students ranging from middle school, high school and undergrad-level students during my undergrad years.