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Topic Review
Impacts of COVID-19 on the Food Supply Chain
The COVID-19 outbreak has significantly impacted supply chains and has caused several supply chain disruptions in almost all industries worldwide. Moreover, increased transportation costs, labor shortages, and insufficient storage facilities have all led to food loss during the pandemic, and this disruption has affected the logistics in the food value chain. 
  • 306
  • 15 Jun 2023
Topic Review
Reconfigurable Intelligent Surface-Assisted Heterogeneous Networks
With the development of the next generation of mobile networks, new research challenges have emerged, and new technologies have been proposed to address them. On the other hand, reconfigurable intelligent surface (RIS) technology is being investigated for partially controlling wireless channels. RIS is a promising technology for improving signal quality by controlling the scattering of electromagnetic waves in a nearly passive manner. Heterogeneous networks (HetNets) are another promising technology that is designed to meet the capacity requirements of the network. RIS technology can be used to improve system performance in the context of HetNets.
  • 325
  • 15 Jun 2023
Topic Review
Parity–Time-Symmetric Inductor–Capacitor Sensing Systems
Inductor–capacitor (LC) passive wireless sensors is usually composed of an inductor and a sensitive capacitor, whose resonant frequency is modulated by parameters of interest. An external impedance analyzer interrogates the sensors via near-field coupling to realize the purpose of passive wireless detection. Parity–time (PT) symmetry challenges the long-held theoretical basis that only Hermitian operators correspond to observable phenomena in quantum mechanics. Non-Hermitian Hamiltonians satisfying PT symmetry also have a real-valued energy spectrum. In the field of inductor–capacitor (LC) passive wireless sensors, PT symmetry is mainly used for improving performance in terms of multi-parameter sensing, ultrahigh sensitivity, and longer interrogation distance. 
  • 443
  • 15 Jun 2023
Topic Review
Sensor Topology Optimization by Applying Neural Network Configuration
In dense IoT deployments of wireless sensor networks (WSNs), sensor placement, coverage, connectivity, and energy constraints determine the overall network lifetime. In large-size WSNs, it is difficult to maintain a trade-off among these conflicting constraints and, thus, scaling is difficult. The neural network dynamically proposes and handles sensor placement coordinates in a 2D plane, having the ultimate goal to extend network lifetime. Simulation results show that algorithm improves network lifetime, while maintaining communication and energy constraints, for medium- and large-scale deployments.
  • 310
  • 15 Jun 2023
Topic Review
Additive Manufacturing in Orthopedics
Biomaterial implants are utilized to fix fractures or replace parts of the body. For the majority of these implant cases, either metal or polymer biomaterials are chosen in order to have a similar functional capacity to the original bone material. Additive manufacturing, also known as 3D printing, is a manufacturing technique that creates 3D objects by adding material layer by layer. The use of biodegradable polymers, additive manufacturing, and advanced 3D printing technologies offers promising solutions for improving biocompatibility, mechanical properties, and customization in the development of implants and tissue engineering constructs.
  • 323
  • 15 Jun 2023
Topic Review
Role of Metaverse in Education
The potential of the metaverse as a tool to connect people has been increasingly recognized. The opportunities offered by the metaverse seem enormous in many sectors and fields of application. The metaverse presents a promising opportunity for educational innovation, particularly in fields that require hands on experience and practical training.
  • 356
  • 15 Jun 2023
Topic Review
Biological Synthesis of Nanoparticles from Microalgae
Microalgae have been a source of useful compounds mainly used as food and dietary supplements. They have been used as a source of metabolites that can participate in the synthesis of several nanoparticles through inexpensive and environmentally friendly routes alternative to chemical synthesis.
  • 454
  • 15 Jun 2023
Topic Review
Equipment Purchase Orders for Steel Plants Maintenance
Recently, equipment replacement and maintenance repair and operation (MRO) optimization have substantially increased owing to the aging and deterioration of industrial plants, such as steel-making factories in Korea. Therefore, plant owners are required to quickly review equipment supply contracts, i.e., purchase order (PO) documents, with suppliers and vendors.
  • 339
  • 14 Jun 2023
Topic Review
Sources and Attributes of Membrane-Coated Nanosystems
Achieving precise cancer theranostics necessitates the rational design of smart nanosystems that ensure high biological safety and minimize non-specific interactions with normal tissues. In this regard, “bioinspired” membrane-coated nanosystems have emerged as a promising approach, providing a versatile platform for the development of next-generation smart nanosystems.
  • 391
  • 14 Jun 2023
Topic Review
Logic Operations Based on Memristive Devices
Memristor, as a promising computing and memory integration device, offers a new research idea for the conventional logic circuit structure and architecture innovation, given its non-volatility, scalability, low power consumption, fast switching speed, etc. A brief overview of the characteristics and current status of memoristor-based logic circuits,and analyzes their applications in numerical expression and memory were introduced here. The benefits and drawbacks of various analog logic circuit structures are summarized and compared. In addition, some solution strategies for these issues are presented. The prospects for the applications of memristors in logic implementation of large-scale memristor arrays, the novel structure of computing in-memory, and neural network computing were described.
  • 680
  • 14 Jun 2023
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