Review
Chemistry, Analytical
Md Eshrat E. Alahi, Arsanchai Sukkuea, Fahmida Wazed Tina, Anindya Nag, Wattanapong Kurdthongmee, Korakot Suwannarat, Subhas Chandra Mukhopadhyay
Summary: As the global population grows and urbanization becomes more prevalent, cities face challenges in providing convenient and sustainable lifestyles. The Internet of Things (IoT) has emerged as a solution to this, connecting physical objects using electronics and communication networks. By leveraging Artificial Intelligence (AI) and analyzing IoT data, opportunities arise to design and manage smart cities. This review article explores the characteristics of smart cities, the architecture of IoT, wireless communication technologies, AI algorithms, and the integration of IoT and AI in smart city scenarios.
Review
Chemistry, Analytical
Maurizio Murroni, Matteo Anedda, Mauro Fadda, Pietro Ruiu, Vlad Popescu, Corneliu Zaharia, Daniele Giusto
Summary: Smart cities and 6G are transformative technologies that require a critical reassessment of the wireless communication sector for smart cities, including IoT infrastructure, economic factors, and operational strategies. Various technical issues such as interoperability, data privacy, security, the digital divide, and implementation concerns need to be addressed. This article focuses on the potential impact of 6G on smart cities and explores the extensive range of applications it can introduce, building on the groundwork laid by the current 5G standard.
Review
Agriculture, Multidisciplinary
Yu Tang, Sathian Dananjayan, Chaojun Hou, Qiwei Guo, Shaoming Luo, Yong He
Summary: In the next decade, 5G technology will significantly impact the agricultural sector, improving crop yield and quality, enabling smart farming, and promoting automation and unmanned farms.
COMPUTERS AND ELECTRONICS IN AGRICULTURE
(2021)
Article
Chemistry, Analytical
Celio Marcio Soares Ferreira, Charles Tim Batista Garrocho, Ricardo Augusto Rabelo Oliveira, Jorge Sa Silva, Carlos Frederico Marcelo da Cunha Cavalcanti
Summary: The emergence of 5G will lead to a widespread adoption of IoT devices, particularly in Smart Cities. The integration of Blockchain with IoT can provide distributed security information to address challenges in reliability and security.
Article
Urban Studies
Leonidas G. Anthopoulos, Zohreh Pourzolfaghar, Kristina Lemmer, Tobias Siebenlist, Bjoern Niehaves, Ioannis Nikolaou
Summary: This paper discusses the importance of smart cities as hubs and introduces the concept of SC Hub, which aims to standardize and control the various flows in cities.
Article
Telecommunications
Huidi Li, Peng Gao, Yi Zhan, Min Tan
Summary: This article discusses the advantages and applications of integrating blockchain technology into 5G networks, including network security, transaction trustworthiness, and application ecosystems. A multi-framework blockchain service network architecture has been deployed in a real environment.
CHINA COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Ivica Lukic, Kruno Milicevic, Mirko Kohler, Davor Vinko
Summary: This paper proposes a digitalization strategy for the City of Osijek, aiming to improve administration and solve urbanization problems using blockchain technology.
APPLIED SCIENCES-BASEL
(2022)
Review
Energy & Fuels
Yousaf Murtaza Rind, Muhammad Haseeb Raza, Muhammad Zubair, Muhammad Qasim Mehmood, Yehia Massoud
Summary: Smart energy has evolved to integrate multiple domains and technology themes through communication technology and cloud processing. Advances in sensing, communication, and computation technologies enable better implementation of smart energy systems. However, there are still design challenges, including underutilization of available technology and lack of interdisciplinary approach.
Article
Construction & Building Technology
Jose Joaquin Peralta Abadia, Christian Walther, Ammar Osman, Kay Smarsly
Summary: Recent developments in smart sensing technologies have led to the widespread use of smart city applications that rely on IoT frameworks. However, the definitions of smart city and IoT framework vary. This study aims to consolidate these definitions and provide a systematic survey of IoT frameworks for smart city applications, ultimately proposing an abstract IoT framework concept.
SUSTAINABLE CITIES AND SOCIETY
(2022)
Article
Green & Sustainable Science & Technology
Seung-Yoon Shin, Dongwook Kim, Soon Ae Chun
Summary: A smart city aims to be citizen-centered, but disadvantaged groups may be excluded from its benefits. The study found that the social and technical readiness of smart citizens can predict the adoption of emerging 5G smart city innovations.
Article
Computer Science, Information Systems
Jiani Fan, Wenzhuo Yang, Ziyao Liu, Jiawen Kang, Dusit Niyato, Kwok-Yan Lam, Hongyang Du
Summary: A smart city is a concept that aims to better serve residents through new technology. This article focuses on four major smart city domains: smart utility, smart transportation, smart homes, and smart healthcare. However, the existing smart city IoT solutions often lack appropriate security strategies. The objective of this article is to provide application designers with the missing security link they may need in order to improve their security designs.
IEEE INTERNET OF THINGS JOURNAL
(2023)
Article
Engineering, Multidisciplinary
Amin S. Ibrahim, Khaled Y. Youssef, Ahmed H. Eldeeb, Mohamed Abouelatta, Hesham Kamel
Summary: Internet of Things (IoT) technology is driving lifestyle changes in smart city infrastructure, but it faces challenges such as increasing number of nodes, large amount of data, and network congestion. This paper proposes adaptive aggregation techniques based on IoT traffic types to optimize the operational efficiency of IoT smart city networks.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Green & Sustainable Science & Technology
Shayla Islam, Anil Kumar Budati, Mohammad Kamrul Hasan, Hima Bindu Valiveti, Sridhar Reddy Vulupala
Summary: The 5G network fulfills the high data requirements of smart city users and improves mobile data services. This study proposes non-cooperative detection techniques to accurately detect spectrum information for smart city users, leading to sustainable development.
Article
Physics, Multidisciplinary
Mehtab Singh, Sahil Nazir Pottoo, Suvidhi, Sanjeev Dewra, Rishabh, Amit Grover, A. Manikandan, Anu Sheetal
Summary: The demand for high data rate transmission is increasing exponentially, with Radio over Free Space Optics (RoFSO) seen as a promising solution to provide high speed data transmission. The study shows that under dust weather conditions, using Non-Return to Zero (NRZ) modulation performs better than Return to Zero (RZ) modulation in terms of transmission performance and reliability.
FRONTIERS IN PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Jun-Ho Huh, Jae-Hyeon Choi, Kyungryong Seo
Summary: This paper proposes an IoT-based Smart Trash Separation Bin model that can reduce the cost of trash separation work, presenting three efficient designs that use sensor, image processing, or spectroscope technology. These designs can significantly reduce both manpower costs and administrative costs involved.
APPLIED SCIENCES-BASEL
(2021)
Article
Optics
Hang Dong, Zhixin Sun, Jingyi Li, Yahui Li, Wei Zhang, Guangyong Jin
Summary: This paper calculates thermal stresses and adsorption forces to determine laser cleaning conditions and establishes relevant models. Experimental results show that the removal effect is better with increasing nanosecond pulse delay, with the best effect achieved at 600 milliseconds pulse delay. Based on the findings, the mechanisms of oxide film removal involve thermal stress against adsorption and plasma shock wave breaking the oxide layer.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Junjie Zhang, Wenjun Li, Bingtao Li, Zheng-Da Hu, Jicheng Wang, Feng Zhang, Lei Wang
Summary: A multilayer thin film device structure based on Tamm plasmons is proposed for high-performance near-infrared hot electron photodetectors. By optimizing the device structure parameters, high responsivity detection can be achieved.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Hong Huang, Zhiguang Han
Summary: This paper proposes a new ghost imaging reconstruction method using ordered orthogonal Hadamard derived speckle as the illumination speckle series, and introduces the alternating direction multiplier method to improve the imaging performance. The evaluation results show that the method can achieve high-quality reconstructed images under low sampling conditions.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Moritsugu Sakamoto, Yuki Ono, Kohei Noda, Tomoyuki Sasaki, Nobuhiro Kawatsuki, Masayuki Tanaka, Hiroshi Ono
Summary: The effect of wavelength and polarization of illuminating light in polarization imaging for birefringent objects placed behind a scattering structure was experimentally investigated. The result shows that the spatial distribution of the birefringent object was more clearly visualized in the longer wavelength combined with circularly polarized light illumination. This finding indicates the potential of using polarization imaging with circularly polarized light illumination in the near-infrared range for visualizing birefringent objects with scattering.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Peihui Du, Hongfang Wang, Pengwei Li, Rukeyemuhan Abadula, Hmbat Batelbek, Min Gao
Summary: In this study, we theoretically demonstrate the strong coupling between Tamm plasmons and exciton polaritons in metal Al/DBR-molecular structures, extending the operating wavelength to the deep ultraviolet region. The coupling strength can be effectively manipulated by adjusting the structure parameters, offering potential benefits for the development of new-style optical filters.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Priyanka Chaudhary, Akhilesh Kumar Mishra
Summary: We design and numerically investigate the switching dynamics between two outer waveguides in a parity-time (PT)-symmetric adiabatically coupled three waveguides nonlinear directional coupler (NLDC) system. The study shows that the device can provide switching even when the middle waveguide is nonlinear and the outer waveguides are linear. Furthermore, the effect of loss to gain ratio on critical switching power and the impact of launched light power and gain (loss) value on transmitted power are also studied.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Wei Feng, Yongcong Yi, Shuyang Li, Zhi Xiong, Boya Xie, Zhen Zeng
Summary: Traditional imaging techniques are ineffective in achieving clear underwater imaging due to the presence of scattering media. Single-pixel imaging (SPI) system based on Unet++ offers a solution for reconstructing high-quality images in highly turbid water environments.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Xiaorui Qu, Jufeng Zhao, Haijun Tian, Junjie Zhu, Guangmang Cui
Summary: This paper studies the structural similarity between RGB and spectral images and proposes a non-iterative Images Structure Similarity (ISS) method for fast reconstruction of spectral images. Additionally, the input of the Deep Image Prior (DIP) method is optimized for the first time by using the initial spectral data reconstructed by ISS, leading to an improved starting value for the iteration. The experimental results show that the proposed method can enhance the reconstruction quality in both spectral and spatial resolutions, while significantly reducing the reconstruction time compared to other DIP-based methods.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Donghe Sheng, Zhe Han, Zanyang Qiao, Tianpei Dong, Chenxi Wang, Huiping Tian
Summary: In this study, a distributed multi-parameter sensor based on an etched few-mode multi-core fiber is proposed, allowing simultaneous sensing of temperature, strain, and sample refractive index. By combining space division multiplexing and stimulated Brillouin scattering, the sensor achieves high sensitivity in detecting these parameters.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Dehao Chen, Zhenwu Mo, Zehong Liang, Junjie Jiang, Huilin Tang, Yidan Sun, Ziyu Wang, Quanfeng Wei, Yanru Chen, Dongmei Deng
Summary: In this study, a novel family of elliptical Airyprime vortex beams (EAPVBs) is introduced, which inherits the excellent self-focusing properties of the circular Airyprime vortex beam (CAPVB). The asymmetric focusing of EAPVB leads to some novel properties, such as the splitting of high-order optical vortex and the formation of two foci. By taking advantage of these properties, EAPVB is constructed as a tunable optical bottle for particle capture.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Xiao Ma, Qiongchan Shao, Jian-Jun He
Summary: In this study, an SHS chip based on Su8 waveguide was designed and fabricated. By physically adjusting the metal electrodes and compensating for transmissivity fluctuations, the generation of side ripples was successfully suppressed.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Hongbin Zhang, Jiansen Du, Zongtao Chi, Hailin Cong, Bin Wang
Summary: In this paper, a novel type of dual-wavelength confocal metalens is proposed to solve the spatial crosstalk between two wavelengths. The metalens can greatly reduce the spatial crosstalk and achieve high precision and efficiency in confocal imaging. It can also focus light in specific wavelength ranges, making it suitable for imaging, microscopy, and optical fiber communication.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Rui Qiu, Guanmao Zhang, Shaokai Du, Jie Liu, Hongyu Jib, Kaiyun Bi, Bochuan Xing, Guangchao Diao
Summary: Recent research has developed an achromatic metalens that shows potential for replacing traditional lenses. This study focuses on a continuously variable focus height broadband achromatic metalens for long-wavelength infrared applications. By optimizing materials and parameters, chromatic aberration is effectively corrected, making it suitable for high-resolution LWIR imaging and spectroscopy systems.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Marcos Troncoso-Costas, Gaurav Jain, Yiming Li, Mohammed Patel, Lakshmi Narayanan Venkatasubramani, Sean O'Duill, Frank Smyth, Andrew Ellis, Francisco Diaz-Otero, Colm Browning, Liam Barry
Summary: In this work, a fast-switching tuneable laser capable of wide wavelength coverage, low noise and linewidth levels suitable for high-order modulation formats is demonstrated. The laser is characterized to cover a wavelength range of 35 nm in the C-band with nanosecond switching time. It is used to successfully demonstrate 480 Gbit/s 16QAM transmission over 25 km of single-mode fiber for a wavelength range of 19 nm.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Takeshi Moriyasu, Masahiko Tani, Hideaki Kitahara, Takashi Furuya, Jessica Afalla, Toshiro Kohmoto, Daishiro Koide, Hiroki Sato, Mitsutaka Kumakura
Summary: Optical pump-terahertz probe spectroscopy was used to study the photocarrier dynamics and optical characteristics of semiconductor Si. The results showed that the thickness of Si influenced the transmitted terahertz field amplitude and peak delay time, indicating differences in photocarrier dynamics between different Si materials.
OPTICS COMMUNICATIONS
(2024)