On the choice of criteria for the effectiveness of gas-vortex stabilization of plasma torches

A rationale of the principles of evaluating the effectiveness of gas-vortex stabilization of plasma torches has been provided. Taking into account the new possibilities of numerical modeling methods, new criteria have been introduced, their application allows both the developing of new gas-vortex stabilization methods and their using for evaluating the results of plasma equipment designing.

Interpolation-Based Smart Video Stabilization

Video stabilization is the process of eliminating unwanted camera movements and shaking in a recorded video. Recently, learning-based video stabilization methods have become very popular. Supervised learning-based approaches need labeled data. For the video stabilization problem, recording both stable and unstable versions of the same video is quite troublesome and requires special hardware. In order to overcome this situation, learning-based interpolation methods that do not need such data have been proposed. In this paper, we review recent learning-based interpolation methods for video stabilization and discuss the shortcomings and potential improvements of them.

Stabilization methods and biochemical parameters of drone brood

The range of practical use of bee products is constantly expanding. Among the large assortment of these products, in recent years, drone brood larvae have received great attention, which can be obtained without harming the bee colony during the active period of the beekeeping season. Drone brood contains a complex of biologically active substances, including unique fatty acids, vitamins, essential amino acids, steroid hormones. The content in the drone brood of a large amount of nutritious and biologically active components serves as the basis for its inclusion in the diet of animal feeding and the diet of people in order to improve the body’s health. Drone brood homogenate is a new beekeeping product, which is a biomass obtained from homogenized drone larvae. This product is a biologically active raw material with a rich composition necessary for the normal functioning of the body. Once removed from the hive, the brood must be stabilized for further use. In this work, the following methods of stabilization of the drone brood homogenate have been studied: freezing, adsorption using a lactose-glucose adsorbent, and lyophilization. The use of stabilization of drone brood by means of freeze-drying (freeze-drying) allows preserving some biologically active compounds in the brood. But freeze-dried products actively adsorb moisture from the environment, which stimulates the development of reactions that lead to a decrease in the quality of the product. Adsorption, in comparison with freeze drying, makes it possible to better preserve biologically active substances in a homogenate obtained from drone larvae. Stabilization of drone brood by freezing provided the most complete fixation of the most important components of drone brood in contrast to other stabilization methods.

Development of Digital Twins to Optimize Trauma Surgery and Postoperative Management. A Case Study Focusing on Tibial Plateau Fracture

Background and context: Surgical procedures are evolving toward less invasive and more tailored approaches to consider the specific pathology, morphology, and life habits of a patient. However, these new surgical methods require thorough preoperative planning and an advanced understanding of biomechanical behaviors. In this sense, patient-specific modeling is developing in the form of digital twins to help personalized clinical decision-making.Purpose: This study presents a patient-specific finite element model approach, focusing on tibial plateau fractures, to enhance biomechanical knowledge to optimize surgical trauma procedures and improve decision-making in postoperative management.Study design: This is a level 5 study.Methods: We used a postoperative 3D X-ray image of a patient who suffered from depression and separation of the lateral tibial plateau. The surgeon stabilized the fracture with polymethyl methacrylate cement injection and bi-cortical screw osteosynthesis. A digital twin of the patient’s fracture was created by segmentation. From the digital twin, four stabilization methods were modeled including two screw lengths, whether or not, to inject PMMA cement. The four stabilization methods were associated with three bone healing conditions resulting in twelve scenarios. Mechanical strength, stress distribution, interfragmentary strains, and fragment kinematics were assessed by applying the maximum load during gait. Repeated fracture risks were evaluated regarding to the volume of bone with stress above the local yield strength and regarding to the interfragmentary strains.Results: Stress distribution analysis highlighted the mechanical contribution of cement injection and the favorable mechanical response of uni-cortical screw compared to bi-cortical screw. Evaluation of repeated fracture risks for this clinical case showed fracture instability for two of the twelve simulated scenarios.Conclusion: This study presents a patient-specific finite element modeling workflow to assess the biomechanical behaviors associated with different stabilization methods of tibial plateau fractures. Strength and interfragmentary strains were evaluated to quantify the mechanical effects of surgical procedures. We evaluate repeated fracture risks and provide data for postoperative management.

Features and Applications of Urine Stabilization Methods: A Review

The recovery of nutrients from unconventional water such as domestic sewage is considered as a sustainable solution to environmental sanitation, personal hygiene, water, and food safety issues. Source separation of urine and the sequenced treatment techniques are the promising approaches to recover the resources from this unconventional water. However, in the storage of urine, urea is hydrolyzed under the action of urease, resulting in odor, precipitation and the loss of ammonia, which is a challenge to be overcome in the process of urine recycling. This review collates research related to urine stabilization, and aims to summarize the characteristics and applications of existing urine stabilization methods, such as acidification, alkalization, electrochemistry, inhibitors and etc. Overall, acidification and alkalization have higher dosage requirements and have an attentional impact on the environment; electrochemical technology is suitable for decentralized sanitation facilities, but the inhibition duration is short; inhibitors are the least effective and are usually used to regulate urease activities in soil environment rather than for urine stabilization. Choosing the appropriate approaches of urine stabilization should focus on the overall perspective of urine resource utilization, consider the separation method and recovery form, and combine it with the concentration technology.