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Deshpande SV, Harikrishnan R, Sampe J, Patwa A. An algorithm to create model file for Partially Observable Markov Decision Process for mobile robot path planning. MethodsX 2024; 12:102552. [PMID: 38299041 PMCID: PMC10828799 DOI: 10.1016/j.mex.2024.102552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Accepted: 01/04/2024] [Indexed: 02/02/2024] Open
Abstract
The Partially Observable Markov Decision Process (POMDP), a mathematical framework for decision-making in uncertain environments suffers from the curse of dimensionality. There are various methods that can handle huge sizes of POMDP matrices to create approximate solutions, but no serious effort has been reported to effectively control the size of the POMDP matrices. Manually creating the high-dimension matrices of a POMDP model is a cumbersome and sometimes even impossible task. The PCMRPP (POMDP file Creator for Mobile Robot Path Planning) software package implements a novel algorithm to programmatically generate these matrices such that: •The sizes of the matrices can be controlled by configuring the granularity of discretization of the components of the state and•The sparseness of the matrices can be controlled by configuring the spread of the observation probability distribution. This kind of flexibility allows one to achieve a trade-off between time complexity and the level of robustness of the POMDP solution.
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Affiliation(s)
- Shripad V. Deshpande
- Symbiosis Institute of Technology, Pune Campus, Symbiosis International (Deemed University), Pune, India
| | - R. Harikrishnan
- Symbiosis Institute of Technology, Pune Campus, Symbiosis International (Deemed University), Pune, India
| | - Jahariah Sampe
- Institute of Microengineering and Nanoelectronics, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia
| | - Abhimanyu Patwa
- Symbiosis Institute of Technology, Pune Campus, Symbiosis International (Deemed University), Pune, India
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Nadzirah S, Mohamad Zin N, Khalid A, Abu Bakar NF, Kamarudin SS, Zulfakar SS, Kon KW, Muhammad Azami NA, Low TY, Roslan R, M Nassir MNH, Alim AA, Menon PS, Soin N, Gopinath SCB, Abdullah H, Sampe J, Zainal Abidin HE, Mohd Noor SN, Ismail AG, Dee CF, Hamzah AA. Detection of SARS-CoV-2 in Environment: Current Surveillance and Effective Data Management of COVID-19. Crit Rev Anal Chem 2023:1-12. [PMID: 37358486 DOI: 10.1080/10408347.2023.2224433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/27/2023]
Abstract
Since diagnostic laboratories handle large COVID-19 samples, researchers have established laboratory-based assays and developed biosensor prototypes. Both share the same purpose; to ascertain the occurrence of air and surface contaminations by the SARS-CoV-2 virus. However, the biosensors further utilize internet-of-things (IoT) technology to monitor COVID-19 virus contamination, specifically in the diagnostic laboratory setting. The IoT-capable biosensors have great potential to monitor for possible virus contamination. Numerous studies have been done on COVID-19 virus air and surface contamination in the hospital setting. Through reviews, there are abundant reports on the viral transmission of SARS-CoV-2 through droplet infections, person-to-person close contact and fecal-oral transmission. However, studies on environmental conditions need to be better reported. Therefore, this review covers the detection of SARS-CoV-2 in airborne and wastewater samples using biosensors with comprehensive studies in methods and techniques of sampling and sensing (2020 until 2023). Furthermore, the review exposes sensing cases in public health settings. Then, the integration of data management together with biosensors is well explained. Last, the review ended with challenges to having a practical COVID-19 biosensor applied for environmental surveillance samples.
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Affiliation(s)
- Sh Nadzirah
- Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia (UKM), Bangi, Malaysia
- Institute of Nano Electronic Engineering (INEE), Universiti Malaysia Perlis (UniMAP), Kangar, Malaysia
| | - Noraziah Mohamad Zin
- Center for Diagnostic, Therapeutic and Investigative Studies, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Arif Khalid
- Center for Diagnostic, Therapeutic and Investigative Studies, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Nur Faizah Abu Bakar
- Center for Diagnostic, Therapeutic and Investigative Studies, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Siti Syafiqah Kamarudin
- Center for Diagnostic, Therapeutic and Investigative Studies, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Siti Shahara Zulfakar
- Center for Toxicology and Health Risk Studies, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Ken Wong Kon
- Department of Medical Microbiology and Immunology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Nor Azila Muhammad Azami
- Medical Molecular Biology Institute (UMBI), Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Teck Yew Low
- Medical Molecular Biology Institute (UMBI), Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Roharsyafinaz Roslan
- Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia (UKM), Bangi, Malaysia
| | - M Nizar Hadi M Nassir
- Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia (UKM), Bangi, Malaysia
| | - Anis Amirah Alim
- Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia (UKM), Bangi, Malaysia
| | - P Susthitha Menon
- Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia (UKM), Bangi, Malaysia
| | - Norhayati Soin
- Faculty of Engineering, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Subash C B Gopinath
- Institute of Nano Electronic Engineering (INEE), Universiti Malaysia Perlis (UniMAP), Kangar, Malaysia
- School of Bioprocess Engineering, Universiti Malaysia Perlis (UniMAP), Kangar, Malaysia
| | - Huda Abdullah
- Department of Electrical, Electronic & Systems Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia (UKM), Bangi, Malaysia
| | - Jahariah Sampe
- Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia (UKM), Bangi, Malaysia
| | | | - Siti Nurfadhlina Mohd Noor
- Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia (UKM), Bangi, Malaysia
| | - Ahmad Ghadafi Ismail
- Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia (UKM), Bangi, Malaysia
| | - Chang Fu Dee
- Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia (UKM), Bangi, Malaysia
| | - Azrul Azlan Hamzah
- Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia (UKM), Bangi, Malaysia
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Haris H, Jin TS, Batumalay M, Muhammad AR, Sampe J, Markom AM, Zain HA, Harun SW, Hasnan MMIM, Saad I. Single and Bunch Soliton Generation in Optical Fiber Lasers Using Bismuth Selenide Topological Insulator Saturable Absorber. Nanomaterials (Basel) 2023; 13:nano13091538. [PMID: 37177083 PMCID: PMC10180442 DOI: 10.3390/nano13091538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 04/08/2023] [Accepted: 04/21/2023] [Indexed: 05/15/2023]
Abstract
In this work, we present the generation of two distinct types of soliton pulses using a Bismuth Selenide (Bi2Se3) saturable absorber (SA) synthesized in our laboratory. The soliton pulses were generated in two different laser cavity configurations, resulting in two types of solitons: a soliton pulse with Kelly sidebands and a bunched soliton pulse with peak-dip sidebands. Both solitons operated at the fundamental repetition rate-23.3 MHz (for the soliton with Kelly sidebands) and 13 MHz (for the bunched soliton with peak-dip sidebands). We observed that the accumulation of nonlinear phase shift from the added single mode fiber (SMF) split the single soliton pulse into 44 pulses in a bunched oscillation envelope. At the same time, peak-dip sidebands were imposed on the bunched soliton spectrum due to constructive and destructive interferences between soliton pulse and dispersive waves. The measured pulse width for both solitons were 0.63 ps (for the soliton with Kelly sidebands) and 1.52 ps (for the bunched soliton with peak-dip sidebands), respectively. Our results demonstrate the potential of Bi2Se3 SAs in generating different types of soliton pulses, which could have potential applications in various areas of optical communication and spectroscopy.
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Affiliation(s)
- Hazlihan Haris
- Faculty of Engineering, Universiti Malaysia Sabah (UMS), Kota Kinabalu 88400, Sabah, Malaysia
| | - Tan Sin Jin
- School of Engineering, KDU University College, UOW Malaysia, Shah Alam 40150, Selangor, Malaysia
- KDU University College, UOW Malaysia, George Town 10400, Pulau Pinang, Malaysia
| | - Malathy Batumalay
- Faculty of Data Science & IT, INTI International University, Nilai 71800, Negeri Sembilan, Malaysia
| | - Ahmad Razif Muhammad
- Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia (UKM), Bangi 43600, Selangor, Malaysia
| | - Jahariah Sampe
- Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia (UKM), Bangi 43600, Selangor, Malaysia
| | - Arni Munira Markom
- School of Electrical Engineering, College of Engineering, Universiti Teknologi MARA, Shah Alam 40450, Selangor, Malaysia
| | - Huda Adnan Zain
- Department of Electrical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia
| | - Sulaiman Wadi Harun
- Department of Electrical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia
| | | | - Ismail Saad
- Faculty of Engineering, Universiti Malaysia Sabah (UMS), Kota Kinabalu 88400, Sabah, Malaysia
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