Body Structure Research Articles

Ideas of Russian students about the essence, types and methods of propaganda: based on the results of empirical research

This article is devoted to the comparison and analysis of a number of results of sociological studies conducted at the sociological faculty of Moscow State University named after M.V. Lomonosov in February 2024 and in April–May 2024. As part of a February 2024 pilot study conducted by standardized interview method, 42 under graduate (48%) and graduate (52%) students of the Faculty of Sociology were selected. The age of 36% of respondents was in the range of 17–18 years, 52% from 19 to 22 years, 12% — from 23 to 26 years. As part of a sociological study conducted at the Faculty of Sociology of Moscow State University named after M.V. Lomonosov in April–May 2024, a sociological study “Social communication in modern society: essence and features” a total of 401 students of the sociological faculty of Moscow State University named after M.V. Lomonosov. The study was conducted by questionnaire. 401 students of the sociological faculty of Moscow State University named after M.V. Lomonosov, of which 73,32% of bachelors and 26,68% of masters, which corresponds to the structure of the student body of the sociological faculty. Among the surveyed students, 70,07% were female, and 29,93% were male, which generally corresponds to the overall gender composition of the faculty students. 65,75% of respondents (i.e. almost two thirds of respondents) were young people aged 19 to 22 years, 19,5% — from 23 to 26 years, 14,75% — from 14 to 18 years. As part of these studies, students were asked a number of questions, including those aimed at identifying their ideas about the essence of the phenomenon of propaganda, types of propaganda, perception of propaganda, destructive and constructive propaganda. Research results have shown that in the student environment as a whole, incorrect and vague ideas about the essence of the phenomenon of propaganda, its various types and methods, as well as the negative attitude of respondents to the phenomenon of propaganda itself prevail, which is clearly visible in a number of detailed definitions of this phenomenon given by them. A significant part of students primarily associates the concept of propaganda with the concepts of “imposition”, “manipulation”, primarily because of the prevailing neoliberal ideologies in social networks and instant messengers, popular among young people, that young people themselves are not particularly aware of. Nevertheless, they state the fact that there is an acute ideological struggle in the Russian Federation and an active neoliberal ideology in modern Russia.

Utilizing Drones to Assess the Body Condition of Tamanend’s Bottlenose Dolphins (Tursiops erebennus) in the Charleston Estuarine System

Body condition is a measure of an animal’s energy reserves relative to its body structure that provides important information about individual- and population-level health. Monitoring the body condition of free-ranging cetaceans has historically been difficult, but in recent years, the unmanned aerial system (UAS, or “drone”) has facilitated noninvasive ways of estimating the cetacean body condition. The Charleston Estuarine System (CES) includes the estuarine and coastal ecosystems surrounding Charleston, South Carolina, and is utilized by Tamanend’s bottlenose dolphins (Tursiops erebennus) throughout the year. The main goals of this study were (1) to test if UASs are suitable for monitoring body condition of dolphins in an estuarine environment, and (2) to determine if site, season, and age class influence the body condition of dolphins in the CES. Land-based UAS surveys were conducted at four sites throughout the CES between September 2022 and May 2023. The body condition of each dolphin was evaluated using images of the individual positioned flat with a straight body at the surface, and a linear mixed effects model was constructed to determine which effects were associated with significant differences in dolphin body condition. After filtering images for quality, 428 images of 174 unique dolphins were included in the final analysis, with repeated body condition estimates of 24 dolphins from multiple seasons. Both season and age class were significant predictors of dolphin body condition, but site was not. In addition, individual dolphins were catalogued in a Drone Dolphin ID database, which allowed some dolphins’ unique body condition changes to be tracked over time. These findings provide an important baseline for dolphin body condition in the CES that can be built upon in future studies to better understand how body condition changes in response to environmental and anthropogenic stressors or for different age classes.

Joseph G. Gall (1928-2024): Cell biologist, naturalist, and mentor extraordinaire.

Joseph Grafton Gall (1928-2024), a founder of modern cell biology, made foundational discoveries on eukaryotic chromosomes and RNA biogenesis. His major contributions include the development of in situ hybridization (later called FISH), demonstration of one DNA double helix/chromosome, isolation of the first eukaryote gene, localization of satellite DNA to centromeric heterochromatin, determination of the first telomeric DNA sequence, and elucidating the structure and functions of Cajal bodies. He was an expert microscopist, a scholar of science history, and an avid naturalist. These attributes, together with his ready embrace of new technologies, contributed to his remarkable success. He was also an early and strong supporter of women in science. His contributions to science and mentoring were recognized by numerous awards including the American Society for Cell Biology's E.B. Wilson Medal, the Society for Developmental Biology's Lifetime Achievement Award, the Albert Lasker Special Achievement Award in Medical Research, and the AAAS Mentor Award for Lifetime Achievement.

A Systematic Review of Upper Extremity Outcome Measures Assessed in Randomized Controlled Trials of Post-Stroke Upper Extremity Rehabilitation in Low-to-Middle-Income and High-Income Countries.

To systematically review Randomized Controlled Trials (RCTs) of post-stroke upper extremity (UE) motor rehabilitation interventions to identify the outcome measures used in studies in low-to-middle-income countries (LMICs) and high-income countries (HICs) and describe the differences in the context of the International Classification of Functioning Disability and Health (ICF). Five databases "Embase, PubMed, CINAHL, Scopus and Web of Science" were searched from 1960 to April 1, 2021. Studies were included if they were: 1) RCTs or RCT crossovers in English; 2) with ≥50% participants affected by ischemic/hemorrhagic stroke; 3) participants ≥18 years old, 4) used an intervention for the hemiparetic UE as the primary objective of the study. Title and abstract screening and full-text studies were reviewed, and data for included studies were extracted by two independent investigators. The study quality was assessed using the Physiotherapy Evidence Database (PEDro) scale. Data analyses were performed using SPSS (V29.0). Of 5,408 records, 1,276 RCTs were eligible, 298 RCTs were conducted in LMICs and 978 in HICs. A higher percentage of RCTs in LMICs employed body structure and function outcome measures for central nervous system (e.g. Fugl Meyer Assessment) and tone and range of motion (e. g. modified Ashworth Scale) as well as activity outcome measures for general activities of daily living (e.g. Barthel Index). In HICs, a higher percentage of RCTs utilized body structure and function outcome measures assessing strength (e.g. Motricity index), activity outcome measures examining motor specific activity (e. g. Action Research Arm Test, Wolf Motor Function Test) and dexterity (e.g. Box and Block Test), as well as participation outcome measures (e. g. Stroke Impact Scale). There were significant differences in the outcome measures chosen for assessing post stroke UE rehabilitation interventions by researchers in LMICs and HICs. This suggests that there might be potential resource and expertise as well as timing constraints that influences the choice of outcome measures in RCTs between HICs and LMICs and highlights the need for investigating the availability of resources, infrastructure, and expertise and their impact on the feasibility and practicality of employing different outcome measures in different countries.

Investigation on the mechanical uncertainty of resistance spot weldings and its effect on structure crashworthiness of automotive B-pillars under side impacts

Resistance spot welding (RSW) is the main connection method for the white body structure of automobiles. Understanding the mechanical uncertainty of RSWs and its effect on structure crashworthiness design is of great significance for vehicle safety and lightweight design. In this work, the mechanical uncertainty of RSW was experimentally investigated and its effect on automotive B-pillar crashworthiness under side impacts was numerically analyzed based on a hybrid response surface model (HRSM). Firstly, the mechanical uncertainty of RSWs and associated failure mechanism were investigated and the fluctuation range of RSW strength under different loading conditions were quantified according to experimental results. Then, a reasonable RSW modeling method and subsystem collision simulation approach were demonstrated and the univariate sensitivity analysis was carried out to reveal the effect of RSWs’ mechanical property on B-pillar crashworthiness. Finally, a HRSM integrating Kriging polynomial and deep neural network (DNN) were proposed as surrogate model, based on which the multi-factor analysis was conducted to explore effects of RSW strength uncertainty on structure crashworthiness design.

Microstructure Evolution of Super304H Steel Used in a Service Power Station Boiler

The microstructure and structure of a Super304H superheater steel pipe after 47,000 h were analyzed by metallographic microscope, scanning electron microscope (SEM), and EDS, and its mechanical properties were measured by hardness meter. The results show that the austenitic grains appear on the outer wall of Super304H steel pipe after service, while the SEM and metallographic microscope tests show that the outer wall particles are coarse. There is an obvious corrosion layer on the outer surface, and the thickness of the corrosion layer on the windward surface is significantly higher than that on the leeward surface. The inner surface is refined and the hardness of the material is significantly increased; the outer surface, the inner surface, and the center all grow abnormally. In this case, the room temperature tensile strength and impact performance of the rough crystal area of the outer wall of the Super304H steel pipe are reduced and fracture along the crystal. Supervision should be strengthened to eliminate the safety risks caused by the abnormal growth of the outer wall austenite grain. The results of crystal phase microscopy show that the main structure of the material still maintains the basic structure of austenitic steel, and particle aggregation mainly occurs in the sub-inner layer of the inner and outer surface. Compared with the lee surface, the middle body structure is basically the same, but whether the thickness of the corrosion layer on the inner surface or the outer surface increases, the deformation degree of the deformation layer is greater. The hardness measurement finds that the hardness of the corrosion layer is caused by the increase in Super304H steel surface stress. In case of pipe explosion accident, the highest chance of pipe explosion here should be closely observed.

Animals of the Mustelid Family in the Linguistic Picture of the World of the Altaians

Purpose. The article describes zoonyms of the Altai language and folklore denoting mustelids, representatives of the fauna of the Altai Mountains. This lexical-semantic group of lexemes in the Altai linguistic culture has not been thoroughly studied yet. The identification of the lexical potential of zoonyms denoting mammals of the mustelid family provide information about the etymology, dialect variants, donative and connotative features that express ideas about those animals in the language and folklore of the Altaians, and their mythological context of use.Results. Lexical meanings of zoonyms have been identified and established: agas /aas ‘ermine’, kish ‘sable’, borsuk ‘badger’, jeeken ‘wolverine’, saras ‘kolinsky’, ‘weasel’, kushkuly/kalazak ‘weasel’, suzar ‘marten’, ‘mink’, toktonok ‘weasel’. Of these, the general Turkic layer of vocabulary includes: agas ‘ermine’, suzar ‘marten’, kish ‘sable’, borsuk ‘badger’, küzen/joonmoiyn ‘ferret’, jeeken ‘wolverine’. Denotative and connotative features that characterize animals are presented in various folklore and literary texts that provide information about their color, body structure, habitat, and their habits.Conclusion. In the religious and mythological picture of the world of the Altaians, such animals as kish/albaa ‘sable’, agas ‘ermine’ were revered totem animals. In relation to these animals, there were certain rules of behavior during the hunt. These factors influenced the development of a system of euphemisms in the language of hunters, formed with the help of such linguistic means of objectifying concepts as metaphor and metonymy.

Scalable O(log2n) Dynamics Control for Soft Exoskeletons

Robotic exoskeletons are being actively applied to support the activities of daily living (ADL) for patients with hand motion impairments. In terms of actuation, soft materials and sensors have opened new alternatives to conventional rigid body structures. In this arena, biomimetic soft systems play an important role in modeling and controlling human hand kinematics without the restrictions of rigid mechanical joints while having an entirely deformable body with limitless points of actuation. In this paper, we address the computational limitations of modeling large-scale articulated systems for soft robotic exoskeletons by integrating a parallel algorithm to compute the exoskeleton’s dynamics equations of motion (EoM), achieving a computation with O(log2n) complexity for the highly articulated n degrees of freedom (DoF) running on p processing cores. The proposed parallel algorithm achieves an exponential speedup for n=p=64 DoF while achieving a 0.96 degree of parallelism for n=p=256, which demonstrates the required scalability for controlling highly articulated soft exoskeletons in real time. However, scalability will be bounded by the n=p fraction.

A Randomized Feasibility Study of Rehabilitation Targeting Upper Extremity Function and Participation Using Hippotherapy and the Equine Environment for Children with Cerebral Palsy and Autism Spectrum Disorder.

Introduction: Children with upper extremity neuromotor impairments often have decreased participation in life activities. Hippotherapy and rehabilitation in the equine environment might be effective in targeting participation, given the community context and natural activity involvement. This randomized controlled feasibility trial assessed recruitment, retention, treatment fidelity, and acceptability of rehabilitation using hippotherapy and the equine environment, targeting upper extremity function and participation for children with neuromotor impairments to inform a larger trial. Methods: This 6-month trial occurred in Ohio, June-December 2021. Participants were 6-17 years old with upper extremity neuromotor impairment (and primary diagnosis of cerebral palsy and/or autism). Participants were randomized into treatment or waitlist control using REDCap. Treatment was 16 h (4 h/week/4 weeks) of rehabilitation using hippotherapy and the equine environment. Control participants completed a 4-week waiting period, then received the treatment. Recruitment, screening, enrollment, attendance, and retention were tracked. Nonblinded assessments of body structures and functions, activity, and participation were administered pre- and postcontrol and treatment. Assessment measure completion, treatment fidelity, and acceptability were recorded. Results: Twenty-six participants were screened between July and October 2021; 77% (20/26) met inclusion criteria; 70% (14/20) enrolled and randomized: 6 control and 8 treatment. Two withdrew after randomization and one was excluded for fear of horses. In total, n = 5 control and n = 6 treatment completed initial assessment. Retention was 80% (4/5) control and 83% (5/6) treatment, just below the a priori criteria (85%). Assessment measure completion was variable (77%-100%) and replacement of some should be considered before advancing to a clinical trial. Treatment fidelity and acceptability were moderate to high. There were no adverse events from study participation. Conclusions: Results demonstrated preliminary evidence of fidelity and acceptability of rehabilitation using hippotherapy and the equine environment for children with upper extremity neuromotor impairments. Some changes should be made to improve enrollment, retention, and outcome measure completion before advancing to a definitive trial. Trial registration: ClinicalTrials.gov identifier: NCT0653068. Trial funding: Eunice Kennedy Shriver National Institute of Child Health and Human Development, Foundation for Physical Therapy Research, American Academy of Cerebral Palsy and Developmental Medicine, and Pedal With Pete Foundation.

IFGAN: Pre- to Post-Contrast Medical Image Synthesis Based on Interactive Frequency GAN

Medical images provide a visual representation of the internal structure of the human body. Injecting a contrast agent can increase the contrast of diseased tissues and assist in the accurate identification and assessment of conditions. Considering the adverse reactions and side effects caused by contrast agents, previous methods synthesized post-contrast images with pre-contrast images to bypass the administration process. However, existing methods pay inadequate attention to reasonable mapping of the lesion area and ignore gaps between post-contrast and real images in the frequency domain. Thus, in this paper, we propose an interactive frequency generative adversarial network (IFGAN) to solve the above problems and synthesize post-contrast images from pre-contrast images. We first designed an enhanced interaction module that is embedded in the generator to focus on the contrast enhancement region. Within it, target and reconstruction branch features interact to control the local contrast enhancement region feature and maintain the anatomical structure. We propose focal frequency loss to ensure the consistency of post-contrast and real images in the frequency domain. The experimental results demonstrated that IFGAN outperforms other sophisticated approaches in terms of preserving the accurate contrast enhancement of lesion regions and anatomical structures. Specifically, our method produces substantial improvements of 7.9% in structural similarity (SSIM), 36.3% in the peak signal-to-noise ratio (PSNR), and 8.5% in multiscale structural similarity (MSIM) compared with recent state-of-the-art methods.

Key point trajectory prediction method of human stochastic posture falls

ABSTRACT The human body will show very complex and diversified posture changes in the process of falling, including body posture, limb position, angle and movement trajectory, etc. The coordinates of the key points of the model are mapped to the three-dimensional space to form a three-dimensional model and obtain the three-dimensional coordinates of the key points; The construction decomposition method is used to calculate the rotation matrix of each key point, and the rotation matrix is solved to obtain the angular displacement data of the key points on different degrees of freedom. The method of curve fitting combined with the weight distribution kernel function based on self-organizing mapping theory is used to obtain the motion trajectory prediction equation of the human body falling in different degrees of freedom at random positions in three-dimensional space, determine the key point trajectory of human random fall behaviour. The experimental results show that the mapped 3D model is consistent with the real human body structure. This method can accurately determine whether the human body falls or squats randomly, and the prediction results of the key points of the human fall are consistent with the actions of the human body after the fall.

Hymenoptera and biomimetic surfaces: insights and innovations.

The extraordinary adaptations that Hymenoptera (sawflies, wasps, ants, and bees) exhibit on their body surfaces has long intrigued biologists. These adaptations, which enabled the immense success of these insects in a wide range of environments and habitats, include an amazing array of specialized structures facilitating attachment, penetration of substrates, production of sound, perception of volatiles, and delivery of venoms, among others. These morphological features offer valuable insights for biomimetic and bioinspired technological advancements. Here, we explore the biomimetic potential of hymenopteran body surfaces. We highlight recent advancements and outline potential strategic pathways, evaluating their current functions and applications while suggesting promising avenues for further investigations. By studying these fascinating and biologically diverse insects, researchers could develop innovative materials and devices that replicate the efficiency and functionality of insect body structures, driving progress in medical technology, robotics, environmental monitoring, and beyond.

In-situ observations of gelatinous zooplankton aggregations in inshore and offshore Arctic waters

AbstractGelatinous zooplankton (GZ), play a crucial role in marine food webs, nutrient cycling, and carbon sequestration, however, quantifying their abundances remains challenging due to their delicate body structure, complex life cycles and variable population dynamics. Their tendency to form sporadic, large-scale aggregations further complicate the differentiation between true ecosystem alterations and stochastic variations in their abundance. In the Arctic Ocean, our understanding of GZ aggregations remains generally incomplete. Using in-situ observations from a towed pelagic camera system, we assessed the diversity and vertical distributions of GZ in fjord and offshore environments in northern Norway and the Svalbard archipelago. We found that Atlantic water masses harbored the highest GZ abundance, while intermediate waters showed the highest diversity. We documented dense aggregations of Beroe spp. in Van Mijenfjorden in Svalbard (observed during ascent of the camera system, not quantified in ind. m−3) and Bolinopsis infundibulum in the open Barents Sea (> 2.67 ind. m−3 at 100 m). Other observed taxa included the hydrozoans Aglantha digitale, Melicertum octocostatum, Solmundella bitentaculata, Pandeidae sp. and Physonectae spp., the scyphozoan Cyanea capillata and the ctenophores Mertensia ovum and Euplokamis sp. By linking the vertical distribution and observations of local aggregations with physical and biotic factors, we described the potential drivers of the distributional patterns observed. Towed camera surveys contribute to accurate in-situ observations, thereby improving our understanding of GZ aggregations and distributions in the Arctic Ocean.

A novel cobweb-like sub-grain structured Al-Cu-Mg alloy with high strength-plasticity synergy

Al-Cu-Mg alloys, as the most widely used lightweight structural materials, have been recognized as promising candidates in the transportation field for a low-carbon economy. However, the tensile strength and plasticity of alloys cannot be simultaneously improved to satisfy the requirements of continuously upgraded transportation vehicles. In this work, inspired by high-tensile strength and high plasticity of cobweb structure, a novel cobweb-like sub-grain structure was developed in Al-Cu-Mg alloys by a successive solution, high-strain-rate rolling (4.4 s-1), cryogenic treatment (–196°C) and aging process (SRCA). Notably, the tensile strength and plasticity of this alloy were superior to those reported in the current study. An ultrahigh Vickers hardness and tensile strength value of 206.2 Hv and 619.6 MPa, which were 39.8% and 31.8% higher than those of traditional T6 heat-treated Al-Cu-Mg alloys, were obtained after SRCA. Meanwhile, an increase in the elongation of this alloy from 4.31% to 8.23% (increase of 90.9%) was also achieved. More importantly, the high strength-plasticity (“double high”) Al-Cu-Mg alloy was attributed to a cobweb-like sub-grain structure, which was proposed for the first time by utilizing reverse thinking to enhance plasticity through elevating dislocations, due to the formation of high-density dislocations from high-strain-rate rolling and rearrangement effect of dislocations from cryogenic treatment. Furthermore, the strength-plasticity mechanism was verified using in-situ tensile electron back scatter diffraction (EBSD), molecular dynamics (MD) simulations, and crystal plasticity (CP) models. The results indicated that the cobweb-like sub-grain structure, resembling countless walls, formed barriers that hindered dislocation migration towards high-angle grain boundaries (HAGBs) and absorbed them, thereby reducing the occurrence of stress concentration zones, i.e., the dislocation absorption and stress-strain sharing mechanisms. Additionally, the strengthening mechanism was associated with synergistic strengthening by multiscale microstructures, including micron-sized grains, micron-sized high-density dislocation lattices, and nanosized Al2CuMg phases, which were activated by successive deformation processes. Consequently, the concept of biomimetic structure design, which may serve as an effective method for achieving structural materials with high strength-plasticity synergy, can be extended to transportation fields, such as railway tracks and body structure design.

Evaluations of Morphometric Traits and Body Conformation Indices of Horse Ecotypes Reared in the Highlands of Bale Eco-Region, Ethiopia.

Morphometric traits discrepancies are associated with production, reproduction, adaptation and behaviours in horses. It also determines the design of harnessing implements, physical injury level and working performance of the native horses. Thus, the study was conducted to evaluate morphometric traits and body conformation indices of horse ecotypes reared across four districts of Bale Zone, Ethiopia. Data of croup height, croup length, hip height, mid-back height, wither height, hip width, thoracic depth, chest width, body length, sternum height, thorax perimeter and cannon perimeter were measured in 500 horses (294 male and 206 female). Using those traits, 17 body conformation indices were calculated to define the horses for multi-faceted performances. The study revealed that croup height, hip height, wither height, hip width, croup length, body length, thorax perimeter and sternum height were significantly (p < 0.0001) different among the studied districts. The district effect was also significant at p < 0.05 for mid-back height, thoracic depth, chest width and cannon perimeter. The sexual dimorphism effect was statistically significant for all measured traits; however, females were inferior to males except for cannon perimeter. Body conformation indices of pelvic index, body index, transversal pelvic index and weight were highly significant (p < 0.0001) among the studied districts. The sex dimorphism effect was significant (p < 0.001) for dactyl-costal index, pelvic index, longitudinal pelvic index, transversal pelvic index, weight, tare index 1 (trot or gallop), tare index 2 (walk) and riding comfort degree, while non-significant (p > 0.05) for the remaining indices. The studied horses were classified as mediline, elipometric, light, small and suitable riding ecotypes with a medium-conforming body structure and good capacity for carrying loads on carts and backs for functional effectiveness. The correlations of body conformation indices ranged from very high to low, with positive and negative associations for functional capabilities. Therefore, selection for improvement needs to rank morphometric traits and body conformation indices in correlation to developing racing and modern sport horses in the highlands of the Bale eco-regions. Further, molecular studies will be essential to determine whether the predominated phenotypic multiplicity is genetic or environmentally progressed.

Reasons for contraceptive discontinuation among women of reproductive age in Kano, Nigeria: A qualitative study

Women’s attempts to achieve their desired levels of fertility are hindered when they stop using contraceptives, which could lead to unwanted pregnancies. This study aimed to assess reasons for contraceptive discontinuation among women of reproductive age in urban and rural areas of Kano State, Nigeria. Qualitative data were collected in urban and rural communities of Kano State in February to May, 2022 from women of reproductive age group, their male partners, family planning service providers, and community and religious leaders. Focus group discussions (FGD), and key informant interviews (KII), using multi-stage sampling methods explored previous experience with contraceptive use, fertility consequences and reasons for contraceptive discontinuation. Following data collection, digitally recorded data were transcribed verbatim, translated, and coded using thematic analysis through an inductive approach. Study reported the high discontinuation rates and identified side effects as the primary reason for discontinuation, with injectable contraceptives being the most commonly discontinued method. Other reported reasons for contraceptive discontinuation by respondents in both urban and rural groups were: method failure, intention to get pregnant, health concerns, husband disapproval, methods not available, inconvenience to use and interference with body structure or functions. The high contraceptive discontinuation poses significant risks of unintended pregnancies and unsafe abortions, thereby increasing maternal morbidity and mortality rates in Kano State. These consequences emphasize the need for family planning interventions that incorporate quality of care in service provision to address contraceptive discontinuation. Engaging men and other social influencers in family planning programs and services will help gather support for contraception, rather than focusing exclusively on women.

From structure to therapy: the critical influence of cartilaginous endplates and microvascular network on intervertebral disc degeneration.

The intervertebral disc (IVD) is the largest avascular structure in the human body. The cartilaginous endplate (CEP) is a layer of translucent cartilage located at the upper and lower edges of the vertebral bodies. On one hand, CEPs endure pressure from within the IVD and the tensile and shear forces of the annulus fibrosus, promoting uniform distribution of compressive loads on the vertebral bodies. On the other hand, microvascular diffusion channels within the CEP serve as the primary routes for nutrient supply to the IVD and the transport of metabolic waste. Degenerated CEP, characterized by increased stiffness, decreased permeability, and reduced water content, impairs substance transport and mechanical response within the IVD, ultimately leading to intervertebral disc degeneration (IDD). Insufficient nutrition of the IVD has long been considered the initiating factor of IDD, with CEP degeneration regarded as an early contributing factor. Additionally, CEP degeneration is frequently accompanied by Modic changes, which are common manifestations in the progression of IDD. Therefore, this paper comprehensively reviews the structure and physiological functions of CEP and its role in the cascade of IDD, exploring the intrinsic relationship between CEP degeneration and Modic changes from various perspectives. Furthermore, we summarize recent potential therapeutic approaches targeting CEP to delay IDD, offering new insights into the pathological mechanisms and regenerative repair strategies for IDD.

Peer-Mediated Social Skills Interventions in Primary School Settings for Autistic Children in the Light of the ICF Bio-psycho-social Model. A Systematic Review.

This systematic review expands the current knowledge about Peer-Mediated Interventions (PMIs) for children with Autism Spectrum Disorder, focusing exclusively on primary school age (6-12years). The study has three aims: (1) describing the main features of the PMI programs; (2) discussing the PMIs efficacy on autistic children's social skills; (3) analyzing whether the PMIs were coherent with the bio-psycho-social model promoted by the International Classification of Functioning, Disability and Health (ICF) classification system, by referring to the person-environment interaction and to the concepts of body functions and structures, environmental factors, and activity and participation. The systematic review followed the PRISMA-P method. The literature search was conducted in August 2024 through PsycInfo, PsycArticles, Education Source, and PubMed databases. A total of 558 articles were generated; 1 study was later added. Twenty-four articles were finally included. Most of the studies used a multiple baseline design across subjects and proved to be effective. Yet, only 5 studies included a follow-up assessment, which showed contrasting results. PMIs partly fit the ICF bio-psycho-social vision, even if they were not designed for this purpose. Our analysis arises from the belief that systematically including the perspective of individual-environment interaction could better guarantee the intervention efficacy.

Arch dam point cloud segmentation based on deep feature learning and normal vector data optimization

Separating the dam body, spillway, and other structures from the point cloud in the dam area is an important step in dam deformation monitoring. Manual segmentation is time consuming and inaccurate. This study proposes a point cloud segmentation neural network model based on normal vector optimization suitable for dam environment: (1) This model utilizes the voxel uniform sampling method of equal length cubes to solve the problem of uneven point cloud density caused by wide range and long-distance measurement during point cloud measurement in dam areas. (2) Designed block input and combined output modules in the model, achieving efficient input of large volume point cloud and eliminating the impact of interpolation points offset during seq2seq model decoding process. (3) In response to the diverse characteristics of point cloud normal vectors presented by vegetation, rock mass, and complex dam structures in the dam area, this paper proposes an adaptive radius plane fitting vector estimation method based on eigenvalue method to improve the accuracy of segmentation. The experiment on the prototype arch dam shows that the proposed normal estimation method improves the classification accuracy of PointNet + + from 96.26 to 98.27%. Compared with the other three normal estimation methods (2-jets, Hough CNN, iterative PCA), the overall accuracy is improved by 0.82%, 1.22%, and 0.22%, and the joint average intersection is improved by 0.0293, 0.0325, and 0.0104. The prototype arch dam experiment shows that our proposed method has a segmentation accuracy of 98.27%. Compared with 2-jets, Hough CNN, and iterative PCA, the overall accuracy has been improved by 0.82%, 1.22%, and 0.22%. This study provides a high-precision segmentation scheme for applications such as deformation detection of dam components based on point clouds.

Design of a Bionic Spider Robot with a Two-Degrees-of-Freedom Leg Structure and Body Frame

Spiders have unique biological characteristics and excellent maneuverability, making them an ideal model for bionic robot design. However, traditional bionic spider robot designs usually have multiple degrees of freedom and confront many challenges. These challenges include complex control requirements, higher energy consumption, larger size and weight, higher risk of failure, and higher cost. This study proposes a leg design with two degrees of freedom to reduce its control and manufacturing costs. It can better control leg movement and improve leg force through a multi-link mechanism and a dual-motor system. In addition, the triangular gait and hexagonal body structure align the weight of the body with the support point, thereby enhancing stability. This study offers a comprehensive and organized approach to bio-inspired robot design, providing a valuable reference for future bionic robot development.