Massive bleeding and wound infection are the major problems often observed during severe trauma, and achieving rapid hemostasis in cases of high‐dose bleeding in arteries and viscera remains an acute ...clinical demand. Herein, a mussel‐ and barnacle cement proteins‐inspired dual‐bionic hydrogel is first proposed. Benefiting from abundant phenolic hydroxyl groups, a tough dissipative matrix, removal of interfacial water, as well as dynamic redox balance of phenol‐quinone, the multinetwork hydrogel achieves repeatable robust wet‐tissue adhesiveness (151.40 ± 1.50 kPa), a fast multimodal self‐healing ability, and excellent antibacterial property against both Gram‐positive/negative bacteria. For rabbit/pig models of cardiac penetration holes and femoral artery injuries, the dual‐bionic bioadhesive shows better hemostatic efficiency than commercial gauze due to the synergistic effect of strong wound sealing capability, excellent red blood cell capturing property, and activation of hemostatic barrier membrane. More interestingly, the hydrogel combined with commercial hemostatic sponge presents accelerated wound healing as well as great potential for treating deep‐wound hemorrhage in a battlefield environment. Overall, owing to these unique advantages, the novel tissue‐adhesive hemostat opens up a new avenue to rapid sealing hemostasis and wound healing applications.
Inspired by mussels and barnacles, a dual‐bionic hydrogel with repeatable adhesiveness, multimodal self‐healing property, and ideal hemostatic effect is constructed as a novel tissue‐adhesive hemostat. The bioadhesive achieves low blood loss and short hemostasis time in various arterial hemorrhage models of rabbits and pigs, showing promising potential in the field of clinical treatment of lethal nonpressing hemorrhage.
Abstract The field of neurobionics offers hope to patients with sensory and motor impairment. Blindness is a common cause of major sensory loss, with an estimated 39 million people worldwide ...suffering from total blindness in 2010. Potential treatment options include bionic devices employing electrical stimulation of the visual pathways. Retinal stimulation can restore limited visual perception to patients with retinitis pigmentosa, however loss of retinal ganglion cells precludes this approach. The optic nerve, lateral geniculate nucleus and visual cortex provide alternative stimulation targets, with several research groups actively pursuing a cortically-based device capable of driving several hundred stimulating electrodes. While great progress has been made since the earliest works of Brindley and Dobelle in the 1960s and 1970s, significant clinical, surgical, psychophysical, neurophysiological, and engineering challenges remain to be overcome before a commercially-available cortical implant will be realized. Selection of candidate implant recipients will require assessment of their general, psychological and mental health, and likely responses to visual cortex stimulation. Implant functionality, longevity and safety may be enhanced by careful electrode insertion, optimization of electrical stimulation parameters and modification of immune responses to minimize or prevent the host response to the implanted electrodes. Psychophysical assessment will include mapping the positions of potentially several hundred phosphenes, which may require repetition if electrode performance deteriorates over time. Therefore, techniques for rapid psychophysical assessment are required, as are methods for objectively assessing the quality of life improvements obtained from the implant. These measures must take into account individual differences in image processing, phosphene distribution and rehabilitation programs that may be required to optimize implant functionality. In this review, we detail these and other challenges facing developers of cortical visual prostheses in addition to briefly outlining the epidemiology of blindness, and the history of cortical electrical stimulation in the context of visual prosthetics.
Display omitted
•Frontier research on plant biomimetics was analyzed.•Three research areas of biomimetic architecture based on plant inspiration were summarized.•Potential of plant biomimetics in the ...field of architecture was emphasized.•Classification showcases practical cases of green biomimetic buildings inspired by plants.•The development trend of future green buildings was summarized.
Green bionic architecture serves as a crucial means to ensure the harmonious coexistence of buildings with the natural environment, preserve ecological balance, and promote energy conservation for sustainable development. Plants, being exemplary bionic prototypes, possess outstanding adaptability and systemic performance. Despite achieving some progress in plant-inspired architectural designs, a comprehensive analysis of the functions, structures, and materials used is lacking, necessitating a thorough examination of these aspects. This study examines practical applications and typical cases of green bionic architecture inspired by plants, summarizing bionic technologies employed in the development of architectural functions, structures, and materials. Drawing inspiration from the light-conducting properties of plants, improvements in indoor temperature conditions and reduced energy consumption can be achieved, with photosensitivity mitigating excessive heating from direct sunlight. The study extracts insights from plant characteristics to guide the design morphology and enhance structural resilience. Bio-mimetic building materials, inspired by natural elements such as plant leaves, corn leaves, and plant fibers, exhibit autonomous compensation, adaptability, and maintenance capabilities, enhancing the environmental adaptability of buildings. Moreover, based on environmental adaptability and plant growth mechanisms, this study proposes a holistic design concept for plant-inspired green architecture, emphasizing key considerations for future designs. These include the development of plant-inspired architectural structures for improved energy efficiency through technological optimization and the strengthening of material technologies to achieve self-regulation, environmental protection, and efficient low-consumption maintenance. Bionic architecture should adhere to natural laws, study plant growth mechanisms, and integrate modern architectural technologies to support innovation and the rapid development of plant-inspired green architecture.
Remora optimization algorithm Jia, Heming; Peng, Xiaoxu; Lang, Chunbo
Expert systems with applications,
12/2021, Letnik:
185
Journal Article
Recenzirano
In this paper, Remora Optimization Algorithm (ROA) is proposed, which is a new bionics-based, natural-inspired, and meta-heuristic algorithm. The inspiration for ROA is mainly due to the parasitic ...behavior of remora. Different locations are updated in different hosts: In some large hosts, remora feeds on the host's ectoparasites or wreckage and evades natural enemies, for example in the case of giant whales. In some small hosts, remora follows the host to move to the bait-rich area to prey, taking the fast-moving swordfish as an example. In the case of these two update methods, remora also makes some judges based on experience. If it takes the initiative to prey, it updates the host, makes a global update. If it eat around the host, remora does not change the host, and continues to local update. This algorithm is more inclined to provide a new idea for memetic algorithm, because the host in ROA can be reasonably replaced, such as ships, turtles, etc. The above dynamic mode and behavior are simulated mathematically and the validity of the ROA is tested with 29 benchmark questions and 5 actual engineering questions. Parallel comparisons are made with 10 other natural heuristics. The statistical results and comparisons show that ROA provides a very promising prospect and a strong competitive ability compared to other state-of-the-art heuristic techniques.
Traditional electronic skin (e‐skin), due to the lack of human‐brain‐like thinking and judging capability, is powerless to accelerate the pace to the intelligent era. Herein, artificial intelligence ...(AI)‐motivated full‐skin bionic (FSB) e‐skin consisting of the structures of human vellus hair, epidermis–dermis–hypodermis, is proposed. Benefiting from the double interlocked layered microcone structure and supercapacitive iontronic effect, the FSB e‐skin exhibits ultrahigh sensitivity of 8053.1 kPa−1 (<1 kPa), linear sensitivity of 3103.5 kPa−1 (1–34 kPa), and fast response/recovery time of <5.6 ms. In addition, it can realize the evolution from tactile perception to advanced intelligent tactile cognition after being equipped with a “brain”. First, static/dynamic contactless tactile perception is achieved based on the triboelectric effect of the vellus hair bionics. Second, the supercapacitive iontronic effect based structural bionics of the epidermis–dermis–hypodermis and a five‐layer multilayer perception (MLP) enable the general intelligent tactile cognition of gesture cognition and robot interaction. Most importantly, by making full use of the FSB e‐skin with a six‐layer MLP neural network, an advanced intelligent material cognition system is developed for real‐time cognition of the object material species and locations via one contact, which surpasses the capability of humans.
An artificial intelligence (AI)‐motivated full‐skin bionic (FSB) e‐skin based on vertically integrated triboelectric e‐skin and supercapacitive iontronic e‐skin is proposed through the mimicry of skin structures including human vellus hair, epidermis–dermis–hypodermis. Assisted by the AI‐motivated “brain,” the proposed FSB e‐skin can promote the function of tactile perception to advanced intelligent tactile cognition.
Bioinspired actuators with stimuli-responsive and deformable properties are being pursued in fields such as artificial tissues, medical devices and diagnostics, and intelligent biosensors. These ...applications require that actuator systems have biocompatibility, controlled deformability, biodegradability, mechanical durability, and stable reversibility. Herein, we report a bionic actuator system consisting of stimuli-responsive genetically engineered silk–elastin-like protein (SELP) hydrogels and wood-derived cellulose nanofibers (CNFs), which respond to temperature and ionic strength underwater by ecofriendly methods. Programmed site-selective actuation can be predicted and folded into three-dimensional (3D) origami-like shapes. The reversible deformation performance of the SELP/CNF actuators was quantified, and complex spatial transformations of multilayer actuators were demonstrated, including a biomimetic flower design with selective petal movements. Such actuators consisting entirely of biocompatible and biodegradable materials will offer an option toward constructing stimuli-responsive systems for in vivo biomedicine soft robotics and bionic research.
•A novel leaf vein bionic field (LVFF) is proposed based on the feathered veins of plants.•The LVFF is optimized by changing the number of branching channels, and is evaluated by power output, ...parasitic power, reaction gas distribution and water removal capacity.•A bionic streamlined block was designed by studying the forms of dropping water droplets and birds.•A novel composite bionic flow field was formed by adding streamline blocks into leaf vein bionic field.
The flow field structure of proton exchange membrane fuel cell (PEMFC) plays a crucial role in fluid flow, species transport, heat transfer and electrochemical reaction of PEMFC. In this study, an improved leaf vein bionic flow field (LVFF) is designed according to the characteristics of the leaf vein network structure. The flow field structure is optimized with the number of branch channels on one side of the main channel, and a detailed performance study of PEMFC with the LVFF has been conducted by the developed three-dimensional (3-D) multiphase computational fluid dynamic (CFD) model which is verified with the experiment data. It is found that the LVFF has the advantages of lower pressure drop, more uniform reaction gas distribution, and a higher power output compared to the conventional flow field. It is found the LVFF with 10 branch channels (named BC-10) on one side of the main channel has the largest power output, which is increased by 5.894% than the power output of the convention serpentine flow field (CSFF) design. Furthermore, the bionic streamline blocks are placed inside branch channels based on BC-10 configuration to construct a composite bionic flow field (CBFF) by which it seeks the potential to further improve the performance of PEMFC. It is found that the maximum power output of the CBFF is increased by 8.475% than the serpentine flow field’s. In addition, the distribution of reaction gas and current density are found more uniform. The novel composite bionic flow field structure is beneficial to the performance improvement and long-term steady operation of PEMFC.
The manufacture of bionic materials to simulate the natural counterparts has attracted extensive attention. As one of the subcategories of biomimetic materials, the development of artificial enzyme ...is intensive pursuing. As a kind of artificial enzyme, nanozymes are dedicated to solve the limitations of natural enzymes. In recent years, attributed to the explosive development of nanotechnology, biotechnology, catalysis science, computational design and theory calculation, research on nanozymes has made great progress. To highlight these achievements and help researchers to understand the current investigation status of nanozyme, the state‐of‐the‐art development in nanozymes from fabrication materials to bioapplications are summarized. First different raw materials are summarized, including metal‐based, metal‐free, metal‐organic frameworks‐based, and some other novel matters, which are applied to fabricate nanozymes. The different types of enzymes‐like catalytic activities of nanozymes are briefly discussed. Subsequently, the wide applications of nanozymes such as anti‐oxidation, curing diseases, anti‐bacteria, biosensing, and bioimaging are discussed. Finally, the current challenges faced by nanozymes are outlined and the future directions for advancing nanozyme research are outlooked. The authors hope this review can inspire research in the fields of nanotechnology, chemistry, biology, materials science, and theoretical computing, and can contribute to the development of nanozymes.
To highlight these achievements and help researchers to understand the current investigation status of nanozyme, the state‐of‐the‐art development in nanozymes from fabrication materials and catalytic properties to anti‐oxidation, curing diseases, anti‐bacteria, biosensing, bioimaging, and the like are summarized in this review. Furthermore, the challenges faced by nanozymology are outlined and the future directions for advancing nanozyme research are outlooked.
PDF
