Seunghyun Hwang

This project was carried out in personal time to effectively manage the increasing demand for code interviews in the workplace. Bifrost includes two SPAs for both the interviewer and interviewee. It also includes a mailing system to notify the interview's progress. Interviewers can submit their code and check the results in real-time.

The goal of this project is to implement a framework for creating high-precision 3D maps from lidar data. I have implemented a framework that runs modules used for map creation on multiple machines in a distributed manner and provides an interface for accessing the aggregated map information.

The purpose of the lidar parser is to construct a point cloud from lidar packets. Although the lidar manufacturer provides a library, I needed custom functionality, and since integrating the functionality with the packet parsing process would result in zero-cost implementation, I decided to implement the driver myself. In addition, the official library integrated not only packet parsing but also the network stack, and since packet structures varied by lidar model, it was inconvenient to use. The library I have implemented provides a unified interface for accessing packet information and shows about 3x better performance than the official library.

The objective of the IITP research project conducted in the laboratory is to reduce job latency by using smartphones as edge nodes. My role was to design a fault-tolerant task processing model using a RSU and to implement a communication interfaces between Data Generator, OBU, MEU, and the cloud and these components.

The serverless platform developed for research purposes aims to minimize the cost of messaging between functions and accessing external storage on data dependencies in workflows running in a serverless environment. Two papers related to this project have been published in IEEE MASS 2019and ICICPE 2019, respectively. In addition, it has been used in the IITP research project being carried out in our laboratory.

I developed a web-based dashboard to monitor the status of physical and virtual machines for a research project in the lab. The server was developed using the Express framework, and real-time machine information updated in the MySQL database is sent to clients connected through WebSocket. The component that summarizes real-time monitoring information for machines and displays it in a card format was implemented using Vue.js. The top border color indicates the machine's status, and a dot next to the machine's name blinks when the information is updated, allowing users to check the connection status.

I came up with an idea for my senior project based on my studies in the multimedia signal processing lab, and I thought it was a good idea, so I decided to apply for a patent. The idea is about protecting the presenter's eyesight from the beam of a projector. In summary, by connecting the camera in the direction of the projection area of the projector, separating the background and presenter from the input image, and protecting the eyesight by masking the presenter's area from the projected image.

The goal of this project was to implement a chat program using TCP sockets. The program should provide multiple chat rooms, and allow users in different chat rooms to send private messages to each other.

The goal of this contest is to develop an application for a smartwatch. Our team has developed a cooking assistant application that allows users to view cooking recipes using gestures without using their hands while cooking. We have also implemented a smartphone application that synchronizes with the smartwatch screen. My role was to develop a simple server that responds to recipes and implement the user interface for the smartwatch application. Additionally, I defined the messages and synchronization protocols required for synchronizing the screens between the two applications.

The goal of this project is to implement Point to Point Protocol (PPP) and a 1:1 chat program using it. PPP should include features such as Segmentation & Reassembly, Checksum, Multi-thread, Ring Buffer, Sliding Window Flow Control & Error Control, and Byte Stuffing. I was the only student in this class who implemented Bidirectional Full-Duplex communication with Go-Back-N and Piggyback, and received the highest grade.

The goal of project is to implement an O(1) Scheduler to pass the Alarm-priority Test of Pintos, an educational operating system developed by Stanford University. I was the only student in this class who passed the test, and received the highest grade.

The goal of this project is to develop an Advanced Tic-Tac-Toe game. It is required to design appropriate classes and should use two or more data structures.

The goal of this contest is to develop applications on a Smart TV with webOS. Our team developed a card game that can be played on a Smart TV as shared public table, with each player receiving their own card on their personal smartphone. My role was to manage the game state on the server and send real-time updates of the game state to the client to update their UI state. I implemented a responsive web without existing design framework.

The objective of this contest is to implement a service using public data. We developed a community application using nationwide tourist attraction data. The server periodically queries public data for tourist attractions and creates gallery boards based on the attraction names. Users can share photos or videos taken at these attractions on the corresponding board. My role was to develop the server that provides information of the board through REST and the module that retrieves information from the server on Android.

The goal of this project is to design and create a circuit using logic components and a 555-timer to sequentially display given numbers on a 7-segment display every one second. My numbers were 0, 1, and 3.