External Condition Research Articles

The effect of internal, external, and holistic focus of attention on standing long jump performance in novice and skilled karatekas.

An important application for training instructions is found in directing one's attentional focus. This direction can occur in different internal, external, or holistic forms. However, comparison between these three forms of instructions is a relatively recent development rarely reported at different skill levels or various sports including karate. Therefore, the present study attempts to investigate the effects of three forms of instructions on standing long jump performance in skilled and novice karatekas. The participants were 60 skilled and novice karatekas (all females; mean age: 21.32±1.65) who completed 12 standing long jump trials under different focus conditions (3 trials for each condition: internal, external, holistic and control condition) in a counterbalanced order. Our findings suggested significant main effects, indicating that skilled karatekas outperformed the novices. The findings also showed that regardless of skill levels, the participants exhibited similar performance under external and holistic focus conditions while performance in both of these conditions was superior compared to performance under internal focus and control conditions. No difference was observed between the control and internal focus conditions. It seems that skilled and novice karatekas may benefit from holistic and external focus of attention instructions which enhance their motor performance. Thus, it is recommended that coaches should incorporate these two types of attentional focus instructions into their training sessions.

Новые возможности и новые риски устойчивого развития российской Арктики в условии климатических изменений

The Arctic climate has been changing dramatically in recent years. This external condition, on the one hand, increases the risk of sustainable development of the Arctic; on the other hand, in combination with the management factors of the Russian Federation’s Arctic zone, it provides new development oppor-tunities. Based on the authors’ methodology, the paper assesses the efficiency of sustainable development management of the Arctic by comparing the costs of environmental protection and the volume of pollutants entering the Arctic ecosystems. The study showed that, despite the growth of current expenditures on sustainable development management in the Arctic, their use cannot be considered fully effective and efficient: financial investments do not always lead to a reduction in pollution; investments in sustainable development are uneven and depend on the current conjuncture. Changes in the Arctic climate were assessed by comparing indicators for the period from 1971 to the present, characterizing air temperature, precipitation, snow cover, sea and river ice, permafrost, etc. The analysis revealed an accelerated growth of Arctic climate change indicators. The impact of climate change on new opportunities and new risks for the sustainable development of the Russian Arctic was determined on the basis of authors’ research and correlated with the opinion of authoritative Arctic researchers. Based on the results of the study, the positive and negative effects of the implementation of new opportunities for the Arctic territories in the context of climate change have been identified.

No evidence in favor of the existence of "intentional" binding.

Intentional binding refers to the subjective temporal compression between a voluntary action and its subsequent sensory outcome. Despite some studies challenging the link between temporal compression and intentional action, intentional binding is still widely used as an implicit measure for the sense of agency. The debate remains unsettled primarily because the experimental conditions used in previous studies were confounded with various alternative causes for temporal compression, and action intention has not yet been tested comprehensively against all potential alternative causes in a single study. Here, we solve this puzzle by jointly comparing participants' estimates of the interval between three types of triggering events with comparable predictability-voluntary movement, passive movement, and external sensory event-and an external sensory outcome (auditory or visual across experiments). The results failed to show intentional binding, that is, no shorter interval estimation for the voluntary than the passive movement conditions. Instead, we observed temporal (but not intentional) binding when comparing both movement conditions with the external sensory condition. Thus, temporal binding appears to originate from sensory integration and temporal prediction, not from action intention. As such, these findings underscore the need to reconsider the use of "intentional binding" as a reliable proxy of the sense of agency. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

Laplace Transform Based Modeling of Drug Delivery with Reversible Drug Binding in a Multilayer Tissue.

Drug delivery from a drug-loaded device into an adjacent tissue is a complicated process involving drug transport through diffusion and advection, coupled with drug binding kinetics responsible for drug uptake in the tissue. This work presents a theoretical model to predict drug delivery from a device into a multilayer tissue, assuming linear reversible drug binding in the tissue layers. The governing mass conservation equations based on diffusion, advection and drug binding in a multilayer cylindrical geometry are written, and solved using Laplace transformation. The model is used to understand the impact of various non-dimensional parameters on the amounts of bound and unbound drug concentrations as functions of time. Good agreement for special cases considered in past work is demonstrated. The effect of forward and reverse binding reaction rates on the multilayer drug binding process is studied in detail. The effect of the nature of the external boundary condition on drug binding and drug loss is also studied. For typical parameter values, results indicate that only a small fraction of drug delivered binds in the tissue. Additionally, the amount of bound drug rises rapidly with time due to early dominance of the forward reaction, reaches a maxima and then decays due to the reverse reaction. The general model presented here can account for other possible effects such as drug absorption within the device. Besides generalizing past work on drug delivery modeling, this work also offers analytical tools to understand and optimize practical drug delivery devices.

Chance or challenge? Understanding how the Internet affects the nexus between tourism and urban-rural income inequality

The nexus between tourism and income inequality has received much attention but no consensus emerged. It is of interest to explore how this nexus is affected by the important external condition of the Internet. This study examines the spatial threshold effect of the Internet on the nexus between tourism and urban-rural income inequality by developing a spatial threshold model. Using panel data for 280 Chinese cities from 2003 to 2019, the results show that the impact of the Internet is characterised by clear spatial thresholds, and the local and spatial spillover effects of tourism on urban-rural income inequality vary under different regimes of Internet development. Further, by differentiating the Internet’s functions, the inequality-reducing effect of tourism in local and surrounding cities has strengthened significantly as cities’ Internet penetration improves; meanwhile, this effect has increased first and then decreased as cities’ online market penetration deepens, with a relative optimal interval.

In-depth analysis of embedded-type structures of NixMg4-xAl LDO-composited catalysts and the impacts on glycerol conversion under a base- and H2-free condition

Core-shell composite catalysts composing of AgO@SnO2/ZSM-5 embedded by NixMg4-xAlO LDOs with various Ni/Mg ratios were characterized and tested for the activity on the conversion of glycerol to valuable chemicals under a base-free and external H2-free condition. As a result, the catalytic performance of an embedded composite was found greater than that of its individual constituents, owing to the synergy between a NixMg4-xAlO lodge and embedded AgO@SnO2/ZSM-5. The highest yield of 1,2-propanediol and lactic acid was achieved at the Ni/Mg ratio of 0.2/3.8. NixMg4-xAlO lodges were found to simultaneously drive glycerol dehydration to acetol and glycerol reforming, driven by Ni sites, forming in-situ H2 that enhances 1,2-propanediol formation whereas the AgO@SnO2/ZSM-5 clusters governed acetol oxidation and Cannizzaro reaction that led to the formation of lactic acid. At a high Ni/Mg ratio, the NixMg4-xAlO lodges completely covered AgO@SnO2/ZSM-5 clusters entirely, resulting in the suppression of lactic acid yield due to over-oxidation.

Numerical modelling of thermal jet assisted rock cutting with double PDC cutters

AbstractPreconditioning of rock for drilling operations is a potential method to facilitate the mechanical breakage and mitigate the tool wear. This paper numerically investigates one such preconditioning technique, namely, the thermal jet assisted rock cutting. For this end, a numerical method for solving the governing thermo‐mechanical problem is developed and validated. The continuum approach is chosen to describe the rock failure, being based on a damage‐viscoplasticity model with the Drucker–Prager yield surface and the modified Rankine surface as the tensile cut‐off. In the damage part, separate scalar damage variables are employed for tension and compression. The cutters are modelled as rigid bodies and their interaction with the rock is modelled by imposing contact constraints by the forward increment Lagrange multiplier method, which is compatible with the chosen explicit time integration scheme. A damage‐based erosion criterion is applied to remove the contact nodes surrounded by heavily damaged elements. The thermal jets are modelled with a moving external heat flux boundary condition. The global thermo‐mechanical problem is solved with a staggered approach explicitly in time while applying mass scaling to increase the critical time step. The novel 3D numerical simulations involving two cutters demonstrate the capabilities of the method with a special emphasis on cutter‐thermal jet configurations. Therefore, the present method provides a potential tool for the bit design in thermal jet assisted drilling.

Experimentally elevated corticosterone increases song output and complexity in common mynas.

Vocalization is an important communication tool that can reflect many aspects of an individual's internal and external condition. This is especially true for birds. Previous research has shown that bird calls and songs change in response to a variety of potential stressors, although the extent and direction of the changes depend on the nature of the stressor and the environment. Circulating glucocorticoids, such as corticosterone, often increase in response to stressors and mediate some of the observed changes via alterations of the individual's physiological state. Acute elevations of corticosterone often occur as a physiological response to short-term stressors; however, the effects of this elevation on adult vocalizations have not been well documented. Here, we experimentally elevated corticosterone at two different levels using a noninvasive method and examined the effects on the vocal communication of male and female adult common mynas (Acridotheres tristis). Corticosterone elevation temporarily increased song output and some measures of song complexity, while call output decreased. These effects were dosage dependent (higher corticosterone levels had a stronger effect), most evident 40 min after ingestion, and some vocal changes were sex-specific. Future studies should investigate whether the changes in vocal performance due to elevated glucocorticoids have consequences for the birds' behavior, reproductive success, and survival.

Perceptual learning changes the amplitude not the shape of the temporal window of visual processing.

Perceptual learning (PL) can significantly improve human performance in perceptual tasks primarily through template reweighting. Previous studies have documented how PL changes perceptual template in stimulus feature space. We investigated how PL reweights visual information in time. With a dynamic external noise paradigm and the elaborated perceptual template model (ePTM) analysis, we found that training with an orientation identification task in the zero external noise condition reduced contrast thresholds in both zero and high external noise conditions, whereas training in the high external noise condition only reduced contrast thresholds in high external noise conditions. The ePTM analysis showed that training in both zero and high external noise changed the overall amplitude, but not the shape of the temporal window of the perceptual template to exclude external noise across time, and training in zero external noise additionally reduced additive internal noise. Our results provided additional constraints for models of PL. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

Dilemma in primary care facility development:a qualitative study based on grounded theory in Guilin city

BackgroundSince the new medical reform, remarkable progress was achieved in primary care facilities in the number of consultations and essential public health service program. However, the problems including low quality and high mobility of personnel, weakened capacity and low efficiency of service still remain. Therefore, it has become an urgent task to solve the dilemma in primary care facility development. ObjectiveTo analyze the development dilemma of primary care facilities and propose corresponding countermeasures. MethodsFrom April to May 2021 the managers of 16 primary care facilities in 6 counties and 2 districts in Guilin were selected using multi-stage sampling method and invited to attend semi-structured interviews, which main contents included resource allocation, service capacity building, health insurance policy implementation, and development dilemmas. Grounded theory method was applied to classify, summarize and refine the original interview data at each level by NVivo 11.0 software. ResultsA total of 38 initial concepts, 9 initial categories, 4 main categories, and 1 core category were extracted, and nodes of stagnation in four dimensions including "Constraints in Resource Allocation," "Deviation in Functional Positioning," "Obstacles in the approach of the joint reform of 3Ms(medical service system, medical security system and medicine system)," and "Lack of Cohesion in Hospital Group Construction" were obtained. ConclusionThe development of primary care facilities is constrained by a variety of factors, with resource allocation balance and compensation mechanism improvement as core issue, "approach of the joint reform of 3Ms" as an external condition, "adjustment of functional positioning"(adjustment of functional positioning of primary care facilities) as key link, and the construction of cohesion hospital group as important approach.

Priority Strategy For Improving Dam Operation and Maintenance Performance (Cacaban Dam Case Study)

Dam operation and maintenance activities are critical, so the dam usually works and provides benefits according to plan. Over time, the performance of the Cacaban Dam has decreased significantly. The physical condition of the main building, supporting buildings, and instruments have experienced damage, which could pose a risk to the dam's safety. The main objective of this research is to determine priority strategies for improving operations and maintenance of the Cacaban Dam. Determining priority strategies for improving operations and maintenance in this research uses the DSS (Decision Support System) method with SWOT (Strength, Weakness, Opportunity, and Threat) and QSPM (Quantitative techniques Strategic Planning Matrix). Based on the SWOT analysis results, the resulting strategy is the Diversity Strategy, meaning that the Cacaban Dam is in good internal condition. In contrast, the external condition is not good. The proposed strategy is to minimize external threats/threats with strategic priorities referring to the scoring results using the QSPM method. Meanwhile, from the results of the dam performance assessment, Cacaban Dam obtained an average performance score of 3.45, considered adequate performance. However, if you look at several items of poor performance, there are two items, namely reservoir condition and border and greenbelt conditions, which have poor performance. There are seven components, namely intake buildings, spillway buildings, support hills, dam services, emergency action plans, instrumentation, and surrounding communities, whose performance is quite close to the deficient limit and has the potential for performance to decline. Extra handling is needed to restore the performance of dams and reservoirs.

An Infrared Obstacle Avoidance Car Based on STM32

With the rapid development and wide application of artificial intelligence technology, the function of intelligent obstacle avoidance vehicle is becoming increasingly prominent. This article presents a design and realization method of infrared obstacle avoidance intelligent car based on STM32 MCU. The design is driven by two DC motors as main power sources. The motor drive circuit adopts L298N driver chip to control the DC motor to achieve the purpose of controlling the trolley. The infrared obstacle-avoidance sensor is used to judge obstacles and road conditions, and the distance between the car and obstacles is monitored in real time. The error caused by external physical condition can be eliminated by the calibration and optimization of the infrared obstacle avoidance module and the program of the single-chip microcomputer, so as to achieve the goal of accurate location of obstacles.

Procreating in an Overpopulated World: Role Moralities and a Climate Crisis.

It is an open question when procreation is justified. Antinatalists argue that bringing a new individual into the world is morally wrong, whereas pronatalists say that creating new life is morally good. In between these positions lie attempts to provide conditions for when taking an anti or pronatal stance is appropriate. This paper is concerned with developing one of these attempts, which can be called qualified pronatalism. Qualified pronatalism typically claims that while procreation can be morally permissible, there are constraints on when it is justified. These constraints often concern whether an individual is motivated to procreate for the right reasons. For instance, if someone is not sufficiently concerned with the child's future welfare, the qualified pronatalist will say that procreation is not justified. Moreover, David Wasserman says that this concern forms a role-based duty. That is, prospective parents have special duties to be concerned for the child's future welfare by virtue of the role they occupy. In this paper, I argue that a proper examination of a prospective parent's role-based duties entails that more is needed to justify procreation. Bringing a new person into the world leaves fewer resources for people who already need them, and the current size of the human population is unsustainable from a planetary point of view. Therefore, even if there is nothing wrong with procreation per se, the external condition of overpopulation, and its ensuing public health issues, plausibly gives rise to a role-based duty that prospective parents must account for when deciding whether to procreate.

Does having an external focus in immersive virtual reality increase range of motion in people with neck pain?

BackgroundWhen instructing exercises to improve Range of Motion (ROM), clinicians often create an internal focus of attention, while motor performance may improve more when using an external focus. Objectives: Using Virtual Reality (VR), we investigated the effect of tasks with an internal and external focus on maximal ROM in people with neck pain and explored whether this effect was associated with fear of movement. MethodIn this cross-over experimental design study, the cervical ROM of 54 participants was measured while performing a target-seeking exercise in a VR-environment (external focus task) and during three maximal rotation and flexion-extension movements with the VR-headset on, without signal (internal focus task). The main statistical analysis included two dependent T-tests. Pearson correlation coefficients were calculated to investigate whether the differences in ROM in both conditions were correlated to fear of movement. ResultsMaximal neck rotation was larger in the external focus condition than in the internal focus condition (mean difference: 26.4°, 95% CI [20.6, 32.3]; p < 0.001, d = 1.24). However, there was a difference favouring the internal focus condition for flexion-extension (mean difference: 8.2°, 95% CI [-14.9, −1.5]; p = 0.018, d = 0.33). The variability in ROM was not explained by variability in fear of movement (for all correlations p ≥ 0.197). ConclusionAn external focus resulted in a larger range of rotation, but our flexion-extension findings suggest that the task has to be specific to elicit such an effect. Further research, using a task that sufficiently elicits movement in all directions, is needed to determine the value of an external focus during exercise.

Effects of Polyether Amine Canopy Structure on Heavy Metal Ions Adsorption of Magnetic Solvent-Free Nanofluids.

Three Fe3O4 magnetic solvent-free nanofluids with different amine-based coronal layer structures are synthesized and characterized by using magnetic Fe3O4 as the core, silane coupling agent as the corona, and polyether amines with different graft densities and chain lengths as the canopy. The concentration of heavy metal ions after adsorption is measured by atomic absorption spectrometry (AAS) to study the effect of Fe3O4 magnetic solvent-free nanofluids on the adsorption performance of the heavy metal ions lead (Pb(II)) and copper (Cu(II)) in water. The adsorption of Fe3O4 magnetic solvent-free nanofluid was explored by changing external condition factors such as adsorption contact time and pH. Additionally, the adsorption model is established. The magnetic solvent-free nanofluid is separated from water by applying an external magnetic field to the system, and desorption and cyclic adsorption tests are carried out. Based on the adsorption mechanism, the structure design of Fe3O4 magnetic solvent-free nanofluid was optimized to achieve optimal adsorption performance.

공공임대주택 거주자의 주거만족도 영향요인 연구 - 서울시 행복주택을 중심으로

This study aims to comparatively analyze the influencing factors of residents’ housing satisfaction of public rental housing types in Seoul, focusing on Happy Housing, and provide policy implications. The analysis methods were t-test and multiple regression analysis using the SPSS program. Based on the result of the analysis, we find that the more satisfied the residents of Happy Housing are with their living environment (convenience of public transportation, amenities, access to public facilities, etc.), the lower the burden of economic characteristics such as security deposit or monthly rent, the higher their housing satisfaction. Residents of Happy Housing were more satisfied with their housing when the number of household members was smaller and the duration of residency was longer. However, the internal condition of the house (housing performance, interior quality, facility condition, etc.) and external condition (recreation/green space, parking/community facilities, facilities for the disabled/elderly, etc.) were not statistically significant. Based on these research findings, policy implications were recommended to improve the housing satisfaction of residents of public rental housing.

Postoperative outcomes in patients after modified inguinal reconstruction: An observational cohort study

Background. Despite major progress in surgical care, the need remains to reduce the number of recurrences in the postoperative period in inguinal hernia patients and to improve their quality of life (QoL). To this end, the development of a technique for hernia repair, which would decrease dependence on the availability of consumables, appears promising. We present the surgical outcomes of inguinal hernia patients treated by the technique of tension-free hernioplasty using implants and auto-tissue flaps. Objective. To develop a technique for hernia repair with a reduced dependence on the availability of consumables, which could decrease the number of recurrences in the postoperative period in inguinal hernia patients and to improve their QoL indicators. Methods. An observational cohort study of 759 patients with inguinal hernias aged 18 years and older was conducted. The patients underwent treatment at the Ryazan City Clinical Hospital No. 11 and the Ryazan Region Clinical Hospital in the period from 2006 to 2022. The main group included 39 patients, who were operated by the Desarda technique modified by the authors. The modification consisted in the formation of a flap from the aponeurosis of the external oblique muscle, covering the seminal canal, with fixation of its free end to the inguinal ligament. The control group included 720 patients, 454 and 266 of whom were operated by the Bassini and Lichtenstein techniques, respectively. In order to evaluate the surgical outcomes, a comprehensive examination was performed, including collection of complaints, anamnesis, examination of the postoperative suture, and inguinal region. This included the size, shape, and hernia repairability, if any, dilation of the external inguinal ring, skin condition, painfulness and cough tremor at palpation, and ultrasound examination of the inguinal region. QoL was assessed using the SF-36 (Short Form) questionnaire. Statistical analysis was performed using the Statistica 13 software package (StatSoft, USA). Results. The patients of the main and control groups were divided into those who were admitted as planned and emergency patients. Long-term hernioplasty outcomes in the planned surgery patients were as follows: recurrences after the Desarda technique modified by the authors — 0 out of 24 (0.00%); recurrences after the Bassini technique — 44 out of 310 (14.20%); recurrences after the Lichtenstein technique — 7 out of 181 (3.87%). Long-term hernioplasty outcomes in the emergency patients were as follows: recurrences after the Desarda technique modified by the authors — 0 out of 15 (0,00%); recurrences after the Bassini technique — 31 out of 144 (21.53%); recurrences after the Lichtenstein technique — 4 out of 85 (4.70%). In the planned surgery patients of the main group, 5 QoL indicators were statistically significantly higher in relation to at least one method of hernioplasty of the control group. In the emergency patients, this number was 4 indicators. The absence of recurrences, both in planned and emergency patients, was associated with the non-invasiveness of auto-tissue, preserved non-tension, reduced dependence on the availability of consumables, and improved QoL of patients with inguinal hernias. These factors determine the advantages of the Desarda technique modification proposed by the authors. Conclusion. The application of the Desarda technique modified by the authors reduced the number of recurrences in the postoperative period in inguinal hernia in both planned surgery and emergency patients, improving their QoL. The suggested method of herniorrhaphy ensures reduced dependence on the availability of consumables.

A Self-Sensing and Self-Powered Wearable System Based on Multi-Source Human Motion Energy Harvesting.

Wearable devices play an indispensable role in modern life, and the human body contains multiple wasted energies available for wearable devices. This study proposes a self-sensing and self-powered wearable system (SS-WS) based on scavenging waist motion energy and knee negative energy. The proposed SS-WS consists of a three-degree-of-freedom triboelectric nanogenerator (TDF-TENG) and a negative energy harvester (NEH). The TDF-TENG is driven by waist motion energy and the generated triboelectric signals are processed by deep learning for recognizing the human motion. The triboelectric signals generated by TDF-TENG can accurately recognize the motion state after processing based on Gate Recurrent Unit deep learning model. With double frequency up-conversion, the NEH recovers knee negative energy generation for powering wearable devices. A model wearing the single energy harvester can generate the power of 27.01mW when the movement speed is 8km h-1, and the power density of NEH reaches 0.3W kg-1 at an external excitation condition of 3Hz. Experiments and analysis prove that the proposed SS-WS can realize self-sensing and effectively power wearable devices.

Relational Dialectics on Couples of Childbearing Age in Underprivileged Chinese Ethnicity Families in the Use of Contraception in Medan City

Dialectics in the form of contradictions in relationships which can occur due to various things and problems in couple life, as well as in determining the decision to carry out a family planning (KB) program or in determining the use of contraception. This research aims to analyze how the condition of internal and external dialectics and the strategies for resolving internal and external dialectics on couples of childbearing ages in underprivileged families of Chinese ethnicity in Medan City. The research approach uses a combined approach with a mixed methods model embedded design in data collection techniques and data analysis techniques. Therefore, the data produced is quantitative data to answer the internal and external dialectical condition, and qualitative data to answer strategies for resolving internal and external dialectics. Researcher prioritize quantitative data obtained from 100 respondents, while qualitative data collected through focus group discussion with 6 resource persons as informants are meant to complement the data and elaborate the analysis results more fully. The results of the study based on quantitative data with descriptive statistical analysis showed the condition of internal dialectic variables obtained an average value of 4.10 and the external dialectic variables obtained an average value of 3.49 on a 5-point Likert Scale. Based on the assessment criteria using the grand mean analysis, both are in a relatively stable condition. However, this value means that the respondents in this study tend to be more able to cope with the internal dialectics which occur than the external dialectics of contraceptive use. Meanwhile, the dialectic resolution strategy used by respondents in resolving internal dialectics tends to use a balance strategy and in resolving external dialectics using an integration strategy.

BIFURCATION STATE AND RATIONAL DESIGN OF THREE-LAYER REINFORCED COMPOUND CONE-СYLINDER SHELL STRUCTURE UNDER COMBINED LOADING

An analytical-numerical approach to solving the problem of state bifurcation in terms of local and overall stability of a three-layer cone-cylinder shell structure discretely supported by intermediate rings, in particular of modern launch vehicles, under static combined loading by external pressure, axial forces, and torque is proposed in the paper taking into account the stiffness parameters of the intermediate rings in the plane of the initial curvature and for torsion. Corresponding solving equations for the problem are ordinary differential equations of the sixth order (for a cylindrical compart- ment with constant coefficients and for a conical one with variable coefficients along the axial coordinate). Differential relations that determine the conditions of conjugation through the intermediate ring are used. For the numerical solution, the finite difference method is used with central finite differences of the third and second order at the inner points of the shell determination segments and at its ends, respectively, and the second order differences with one step backward or forward at the conjugation points through the ring. The agreement of the calculation results with the known data for three-layer conical and cylindrical shells is shown, as well as in the limiting case, it is done when passing to a single-layer compound cone-cylinder structure. For the considered class of cone-cylinder shell structures, boundary surfaces are constructed that separate the stability region of the structure being under study, depending on the geometric and stiffness parameters of the compartments, reinforcing elements, and the external load condition. The external load effect on the parameter of the post-critical wave formation for the structure under investigation is studied, provid- ing the visualization of the deformation behavior. The analysis of the calculation results has shown that this approach to solving the problem of bifurcation and equistability of the compound structure compartments in relation to the local and overall forms of protrusion allows choosing rational geometric and stiff- ness parameters of the shell components and force elements in terms of improving the weight characteristics of the structure.