Abhishek Sebastian

Mr. Abhishek Sebastian

orcid

Research Focus & Metrics

Academic Career Length

4Years (2023-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 January 2023
Verified
Conference Paper
Open access
PDF file
ASAbhishek Sebastian
Abhishek Sebastian
PRPragna R
Pragna R
SGSudhakaran G
Sudhakaran G
RNRenjith P N
Renjith P N
LHLeela Karthikeyan H
Leela Karthikeyan H
Federated learning is a technique of decentralized machine learning that allows multiple parties to collaborate and learn a shared model without sharing their raw data. Our paper proposes a federated learning framework for intrusion detection in Internet of Vehicles (IOVs) using the CIC-IDS 2017 dataset. The proposed framework employs SMOTE for handling class imbalance, outlier detection for identifying and removing abnormal observations, and hyperparameter tuning to optimize the model's performance. We evaluated the proposed framework using various performance metrics and demonstrated its effectiveness in detecting intrusions with other datasets (KDD-Cup 99 and UNSW-NB-15) and conventional classifiers. Furthermore, the proposed framework can protect sensitive data while achieving high intrusion detection performance.



29 November 2024 in IEEE Access
Verified
Journal Article
Open access
ASAbhishek Sebastian
Abhishek Sebastian
VMVinay Murali
Vinay Murali
RPR. Pragna
R. Pragna
AFA. Annis Fathima
A. Annis Fathima
The Capsule Shape All-Terrain Robot (CS-ATR) is designed to address the challenges of navigating rough and unpredictable environments, such as disaster zones, where stability, maneuverability, and adaptability are critical. This study presents the design and development of the CS-ATR, focusing on its perpendicular dual-track system, real-time PID-controlled tilt correction mechanism specifically for capsule-shaped robots, and autoencoder-based anomaly detection system. The perpendicular dual-track system enables the robot to perform precise lateral movements, allowing navigation through confined spaces, while the PID controller ensures continuous real-time adjustments to maintain balance across uneven terrains. The variational autoencoder enhances the robot’s ability to detect and correct abnormal movements, improving overall system reliability. Extensive simulation experiments using Simscape™ were conducted to evaluate the robot’s ability to maintain balance and adapt to disturbances, such as rocks and pits. Additionally, the performance of the physical prototype was tested on various terrains, including river sand, rocky paths, and simulated pits, to validate its operational effectiveness in real-world conditions. The results demonstrate that CS-ATR effectively overcomes obstacles, maintains stability, adapts to changes in traction, and corrects anomalies, making it a promising solution for applications such as search and rescue missions.

3 October 2024 in TechRxiv
Verified
Preprint
Open access
ASAbhishek Sebastian
Abhishek Sebastian
PRPragna R
Pragna R
As artificial intelligence (AI) continues to advance, its application in healthcare is rapidly evolving from automating routine tasks to handling complex medical decision-making. This paper critically evaluates OpenAI's GPT-o1 model, a large language model, as a potential AI-powered medical practitioner. The study analyzes its performance across various domains of medical practice, including clinical knowledge, differential diagnosis, pharmacology, treatment planning, ethical decision-making, and patient communication. A diverse range of clinical scenarios-spanning cardiology, endocrinology, pulmonology, oncology, and other specialties-was used to assess the model's accuracy, clinical reasoning, and ability to adhere to current evidence-based guidelines. The results revealed that GPT-o1 performs impressively in areas such as diagnosing acute conditions, with an accuracy rate of over 95% in certain cases like STEMI, and offering evidence-based treatment plans, especially in chronic disease management. The model demonstrated significant ethical sensitivity, particularly in handling patient autonomy and end-of-life care, with more than 90% of its responses aligning with ethical best practices. However, challenges remain in the model's ability to manage complex, multifactorial cases that require nuanced reasoning and contextual awareness. In scenarios involving differential diagnoses, such as tuberculosis in endemic regions, GPT-o1's accuracy dropped by 20% due to a lack of consideration of broader epidemiological factors. Moreover, the study found that while GPT-o1 excels in providing medically sound responses that adhere to clinical guidelines, it struggles in emergent, time-sensitive situations where rapid decision-making is critical. The model's response time in medical emergencies, like diabetic ketoacidosis (DKA) or hyperosmolar hyperglycemic state (HHS), lagged behind human judgment by 15-20%, raising concerns about its viability in high-pressure environments.Despite its high overall performance, with accuracy rates ranging between 85-95% across most specialties, GPT-o1 still requires substantial development to fully replicate the nuanced decision-making of human practitioners. This study concludes that while AI holds enormous potential to support healthcare providers, particularly in diagnostics and treatment planning, its current limitations emphasize the need for continued human oversight. To integrate AI models like GPT-o1 into healthcare systems effectively, ongoing collaboration between AI developers and medical professionals is crucial to ensure safety, reliability, and the continuous incorporation of the latest medical research.

23 November 2023 in arXiv
Verified
Preprint
Open access
PDF file
ASAbhishek Sebastian
Abhishek Sebastian
PRPragna R
Pragna R
SGSudhakaran G
Sudhakaran G
RNRenjith P N
Renjith P N
LHLeela Karthikeyan H
Leela Karthikeyan H
Federated learning is a technique of decentralized machine learning. that allows multiple parties to collaborate and learn a shared model without sharing their raw data. Our paper proposes a federated learning framework for intrusion detection in Internet of Vehicles (IOVs) using the CIC-IDS 2017 dataset. The proposed framework employs SMOTE for handling class imbalance, outlier detection for identifying and removing abnormal observations, and hyperparameter tuning to optimize the model's performance. The authors evaluated the proposed framework using various performance metrics and demonstrated its effectiveness in detecting intrusions with other datasets (KDD-Cup 99 and UNSW- NB-15) and conventional classifiers. Furthermore, the proposed framework can protect sensitive data while achieving high intrusion detection performance.