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Topic Review
Green Extraction Techniques for Bioactive Natural Products
Green extraction techniques represent a paradigm shift in the field of NP extraction, emphasizing sustainability, environmental consciousness, and efficiency. These methods prioritize minimizing the environmental impact associated with traditional extraction processes. Their importance lies in addressing the limitations of conventional techniques, such as low yields, substantial solvent usage, and the risk of degrading heat-sensitive compounds. The benefits of green extraction include enhanced efficiency, reduced solvent consumption, and the preservation of valuable bioactive compounds. Examples of green extraction techniques encompass “supercritical fluid extraction (SFE), subcritical water extraction (SWE), ultrasound-assisted extraction (UAE), and microwave-assisted extraction (MAE)”, among others. The significance and advantages of each method contribute to a more sustainable and eco-friendly approach to NP extraction. Detailed discussions on each green extraction technique are provided below, highlighting their unique principles, applications, and advantages in obtaining bioactive natural products.
  • 242
  • 29 Dec 2023
Topic Review
Theory and Application of Zero Trust Security
As cross-border access becomes more frequent, traditional perimeter-based network security models can no longer cope with evolving security requirements. Zero trust is a novel paradigm for cybersecurity based on the core concept of “never trust, always verify”. It attempts to protect against security risks related to internal threats by eliminating the demarcations between the internal and external network of traditional network perimeters. Nevertheless, research on the theory and application of zero trust is still in its infancy, and more extensive research is necessary to facilitate a deeper understanding of the paradigm in academia and the industry.
  • 243
  • 29 Dec 2023
Topic Review
Fly Ash—Slag One-Part Geopolymers
One-part geopolymer concrete/mortar is a pre-mixed material made from industrial by-products and solid alkaline activators that only requires the addition of water for activation. Apart from being environmentally friendly, it also reduces complexity and improves consistency in the mixing process, leading to more efficient production and consistent material properties.
  • 193
  • 29 Dec 2023
Topic Review
Energy Management for Techno-Economic Hybrid Microgrid Optimization
Integrating energy management techniques into renewable energy systems (RESs) improves microgrids’ energy efficiency and stability. This implementation reduces peak loads and energy costs by aligning consumption patterns with producing renewable energy sources.
  • 181
  • 29 Dec 2023
Topic Review
Cross-Laminated Timber in Finland
Although cross-laminated timber (CLT) construction, driven by only a few domestic manufacturers, is relatively new in Finland, sustainability concerns may increase interest in renewable materials, and therefore, CLT may be more accepted in the Finnish construction market. Additionally, active communication about successful projects and new applications can open new avenues for CLT to gain popularity in the Finnish construction market.
  • 282
  • 28 Dec 2023
Topic Review
Metal-Oxide Heterojunction
As technologies like the Internet, artificial intelligence, and big data evolve at a rapid pace, computer architecture is transitioning from compute-intensive to memory-intensive. The emulation of the behaviors of a synapse at the device level by ionic/electronic devices has shown promising potential in future neural-inspired and compact artificial intelligence systems.
  • 167
  • 28 Dec 2023
Topic Review
Natural Zeolites in Cement-Based Construction Materials
Natural zeolite is a honeycomb-structured aluminosilicate mineral with an open crystalline structure which makes it suitable for a variety of applications. The influence of natural zeolites on the workability and setting time of cement-based construction materials revealed that increasing the zeolite content led to a reduction in workability compared to the control mixes. At the same time, the initial and final setting times of cement pastes showed a decreasing trend with an increase in the replacement percentage. The slow pozzolanic reaction of clinoptilolite zeolite results in lower flexural strength and compressive strength values of mortars at the age of 28 days. Blending zeolites with other supplementary cementitious materials resulted in improved values of the mechanical properties of mortar and concrete. The findings regarding the impact of zeolite on the durability of concrete suggest that zeolite shows promise as a viable alternative to cement, with positive effects on various aspects of durability. The majority of the durability factors are interconnected. The presence of conflicting findings is particularly significant in this context, highlighting the need for a comprehensive approach to address these challenges in the future.
  • 275
  • 28 Dec 2023
Topic Review
Power Line Insulators in Digital Images
The power infrastructure is of key importance for the proper functioning of the economy, both industry and services, and for the stable functioning of households.
  • 188
  • 28 Dec 2023
Topic Review
Multi-Input Multi-Output and Non-Orthogonal Multiple Access
Multi-input multi-output and non-orthogonal multiple access (MIMO-NOMA) Internet-of-Things (IoT) systems can improve channel capacity and spectrum efficiency distinctly to support real-time applications. Age of information (AoI) plays a crucial role in real-time applications as it determines the timeliness of the extracted information. In MIMO-NOMA IoT systems, the base station (BS) determines the sample collection commands and allocates the transmit power for each IoT device.
  • 163
  • 27 Dec 2023
Topic Review
A Vision-Based Micro-Manipulation System
Micro-manipulation systems play a critical role in various scientific and industrial applications, enabling precise handling and control of microscopic objects. Precise micro-manipulation is essential, whether it involves the assembly of microelectronic components, the handling of biological samples, or the fabrication of micro-scale structures. However, achieving accurate manipulation at the micro-scale poses unique challenges, primarily due to the minuscule size of the objects involved.
  • 236
  • 27 Dec 2023
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