Problem Of Construction Research Articles

Representative Functions, Variational Convergence and Almost Convexity

We develop a new epi-convergence based on the use of bounded convergent nets on the product topology of the strong topology on the primal space and weak star topology on the dual space of a general real Banach space. We study the propagation of the associated variational convergences through conjugation of convex functions defined on this product space. These results are then applied to the problem of construction of a bigger-conjugate representative function for the recession operator associated with a maximal monotone operator on this real Banach space. This is then used to study the relationship between the recession operator of a maximal monotone operator and the normal–cone operator associated with the closed, convex hull of the domain of that monotone operator. This allows us to show that the strong closure of the domain of any maximal monotone operator is convex in a general real Banach space.

Physical and mechanical modeling of shaping pneumatic formwork by bicubic splines

The article deals with the hierarchical design structure, consisting of four stages of the stress state of pneumatic shells. The main tasks of designing and constructing pneumatic formworks during the construction of thin-walled architectural shells are considered. The introduction of pneumatic formwork into architectural and construction practice has a significant impact on the ability of the architect, builder and designer in the search for new and more advanced forms, as well as the builder in translating the creative ideas of the architect into steel and modern concrete. Thanks to the flexibility and elasticity of the material, it allows the construction of curvilinear spatial shells of a new elastic quality level. The proposed geometric model makes it possible to obtain a variety of software as well as the formation of a discrete-point frame of a finite shape by bicubic splines, which provides a predetermined accuracy for solving subsequent software design and construction problems.

Light Planograph for Insolation Energy Characteristics of Buildings and Territory of Multi-Storey Structures Modelling

This article discusses the problems associated with physical and hygienic studies aimed at determining the influence of insolation – an important climatic factor – on the light, radiation and thermal regime of buildings, and territories in urban development. The article proposes the design of an insolation device of a flatbed type, known as a Svetoplanograph‑2, which can be widely used in solving architectural, construction, urban planning, and energy problems in summer in regions with a warm climate. A method of step-by-step assessment of the insolation-light-thermal regime of buildings and territories with a complex morphological structure of buildings, which is a model of the energy characteristics of insolation, has also been developed. The use of a tablet-type device makes it possible to solve practical urban planning tasks, providing an opportunity to calculate and evaluate the quantitative and qualitative characteristics of the insolation regime in order to improve the environmental and climatic situation in urban buildings and development in the summer. The developed method of forecasting the insolation regime using a tablet-type device is the basis for modelling the energy state of insolation in a human environment in buildings and territories of cities with a hot climate.

Research on the Problems and Countermeasures of the Ideological and Political Theory Courses and Values Throughout the Curriculum Collaborative Construction in Higher Vocational Colleges

Higher vocational universities are important bases for the training of technical and skilled personnel, as well as important places for values education. How to combine ideological and political education and specialized education well is a difficult problem faced by the current higher vocational education. This paper discusses the existing problems in the collaborative construction of ideological and political courses in higher vocational universities and the values throughout the curriculum from the perspectives of teaching content, teaching methods, and teaching objectives, and proposes corresponding countermeasures, hoping to provide some reference for promoting the quality improvement of ideological and political education in higher vocational colleges.

Cyclic behavior of UHPC corner beam-column joints under bi-directional bending

Design codes contain special provisions for anchorage lengths of flexural reinforcement and amount of transverse reinforcement in beam-column joints, to safeguard against joint failure and possible structural collapse. However, those stipulations could lead to congested joints with construction problems such as segregation. This study leverages experimental testing of eight corner beam-column joints under constant axial and cyclic bi-directional bending loads. In addition to being one of few on corner joints under a complex and practical loading, the study’s main aim is to evaluate the effectiveness of ultra-high-performance concrete (UHPC) as a joint fill in lieu of normal strength concrete (NSC). Brittle failure, either by pure shear or shear combined with yielding of beam reinforcement occurred in all NSC joints and varied in shape and intensity depending on the column depth-to-beam longitudinal bar diameter (hc ⁄db) ratio and spacing of transverse beam/column reinforcement. Ductile failure characterized by the yielding of beam reinforcement and plastic hinge at the beam-joint interface occurred in all UHPC joints and was independent of the two aforementioned variables. The application of UHPC in the joint region resulted in increasing the joint ultimate strength by 27.6–54.8%, energy dissipation by 24–163%, and stiffness by 20 to 50%, compared to NSC joints. Such results were obtained when no transverse reinforcement is used in the joint, and only half transverse reinforcement is used in the beam/column members, and with hc ⁄db relaxed to 38% of the code recommended ratio, highlighting the advantages of UHPC joints. Predictions of ACI-ASCE 352R code were found to be overly unconservative and in need of future improvement.

A comprehensive analysis of the problems in sustainable construction and mitigation strategies

The challenges arising due to the construction industry in balancing the development along with ecological concerns are being focussed upon in this paper. The detailed analysis of the materials that are being brought to use as a sustainable material in the constructions sectors is being focussed upon. Since the late 20th century, there have been significant developments in the building industry. Since the population is rising and the need for housing is increasing, all available resources must be employed to satisfy the demand as it stands. This will have a significant long-term effect on the situation since the resources at hand are insufficient to meet the demand. There are many data and trends about sustainable construction approaches that is being developed by the researchers across the world that form the basis of this review study. The work found that associated industries should be encouraged to take part in the seminars, workshops, and other training programs that are organized at various events in order to deepen and improve their comprehension of the concept of sustainable development. The comparison drawn-out in between the conventional and a smart building concludes the benefits of using sustainable methods in the construction industry.

ОБЗОР ИССЛЕДОВАНИЙ ПО ДИСЦИПЛИНАРНОМУ ПОСТРОЕНИЮ ВЫСШЕГО ОБРАЗОВАНИЯ

Higher education is a discipline that originated in the XNUMXs. It started late compared to developed countries. Higher education in our country has developed on the basis of classical theories of disciplines. However, from the point of view of building and researching a higher discipline, education has distinctive features. In this article, the general problems of building the discipline of higher education will be considered as the main content of the discussion. Having analyzed the prerequisites for building a specialized discipline of higher education in our country, focusing on conceptual theory, it discusses the basic principles of building a discipline of higher education. The content analyzes the existing problems in the subject construction of higher education in our country and suggests countermeasures to play a positive role in the development of the discipline of higher education and the improvement of the system of subject construction of higher education.

News Recommendation System Based on User Interest and Deep Network

In order to provide the personalized news recommendation for users more efficiently, the personalized recommendation system combined with deep network was investigated. Based on the deep network, a news recommendation system for users was designed. By means of neural network and aggregating users’ interest characteristics, users’ personalized needs for news recommendation was met. In order to solve the problem of inaccurate construction of users’ interest preference characteristics, a personalized news method based on users’ search records and interest preference was proposed. By constructing exogenous user interest preferences from user search records, the final recommendation list was generated by using the fusion method of the two preferences. Because the traditional recommendation algorithm ignored time series of the users’ browsing behaviors, an improved circulation model of neural network algorithm was proposed. The parallel convolution neural network based on attention was used to aggregate characteristics of users’ interest and the recursive neural network based on attention mechanism was used to explore hidden time series characteristics. At the same time, it was tested on real news data sets and the results showed that this method had a good recommendation effect.

Numerical simulation of the defect's behavior in building structure elements during ultrasonic diagnostics

One of the important scientific problems of modern construction is the detection of cracks in elements of building structures. Among a significant number of methods, ultrasound diagnostics is popular due to automation and speed of processing results. However, the accuracy of ultrasonic methods is in the range of 40%, which does not meet modern requirements. The article considers the problem of ultrasonic wave propagation in a brick and conducts a numerical analysis of the behavior of defects in the form of a crack. The results were obtained in the form of fields of displacements, deformations and stresses in the structure as a function of time. The results obtained make it possible to identify the characteristic features of the reaction of defects to dynamic impact and obtain numerical dependences of the response of the structure in comparison with samples without defects.

Examining the Demographic, Socio-cultural, and Economic Dimensions of In-migrant Construction Workers: A Case Study on Internal Migration Trends, Working Conditions, and Quality of Life

According to the International Organization for Migration (IOM) of the United Nations, the global scenario for the number of international migrants increased to 281 million in 2020, meaning that 3.6% of the world's population lived outside their country of birth in that year. The objective of the study demographic condition of the internal migration population, working conditions of in migrant construction workers, inmigrant construction workers socio culture condition, psychological condition, the consequences and problems faced unorganized migrant construction workers. The research study adopted Descriptive Research design for the present study because the primary of the study is to attain information concerning the existing status of quality of life of migrant construction workers. The researcher moved to another location with the reference of previous contact, in the way, snowball sampling method was used to access the required number of population. It was noted that the majority of the construction workers were semi-skilled and were illiterate. Most of the respondents spoke Hindi as their major language, 38 percent of them spoke Oriya. The workers are said to be receiving monthly wages and the majority of them have a monthly income of up to Rs.10,000 on a average. It was identified that construction workers migrated from other states at 19 to 25 years. Temporary migrants migrating with their families are found to be higher. Among the migrant construction workers within the age group of 26 to 35 years migrate more than others. Sizeable size 94 percent of the respondents belong to the male category, most of the people working as a construction labourers are married. Among the in-migrant construction workers, migrants from Odisha are more in number, followed by people from West Bengal, Tamil Nadu, Andhra Pradesh and other states. The Hindu community is dominated in number compared to Muslim and Christian community.

Evaluating Clinical Skill Competence and Professional Behaviors in Nursing Students Following Simulation Training at the University of Tabuk.

Simulation training has become an integral component of nursing education, offering students opportunities to develop and refine their clinical skills in a controlled and safe environment. This study aimed to evaluate the clinical skill competence and professional behaviors of undergraduate nursing students following simulation training. A descriptive cross-sectional design was employed for this study. The study was conducted in the simulation center at the University of Tabuk using the Clinical Competency Questionnaire (CCQ), with data collected between January 1, 2023 and February 28, 2023. Participants were enrolled using a convenience sampling method, including nursing students in the 3rd and 4th years who trained in the simulation center and agreed to participate. The study results indicate that a majority of students demonstrated strong theoretical knowledge and practical competence in performing sterile techniques and administering oral medications with minimal or no supervision, with percentages of 74.7% and 73.3%, respectively. A significant proportion of students reported uncertainty or lack of skill in performing shift reports using SBAR (38.4%) and assessing gastrostomy tube placement (32.9%). Students exhibited satisfactory knowledge and competence in maintaining appropriate appearance, attire, and conduct (71.2%), understanding, and supporting group goals (71.2%), and comprehending patients' rights (69.9%). The findings suggest that nursing students attain a relatively high level of clinical competence and self-confidence after simulation training. This study recommends incorporating simulation training in nursing education, which enhances professional behaviors like appearance, group goals, and patient rights, but requires improvement in constructive criticism, problem prevention, and cultural competence.

Research of direct and inverse problems of sensitivity using methods of practical stability by direction

The general statements of the problems of construction of extreme ranges of tolerances on parameters for a linear system of differential equations in the presence of dynamic restrictions on the spread of the state vector are considered. It was found that such sensitivity problems are closely related to the problems of estimating the maximum area of stability in the corresponding function space. In order to obtain upper estimates of the sought values, the problem of estimating tolerances from the positions of stability in a single direction is formalized. The cases of linear and nonlinear restrictions on the spread of the phase coordinate vector with initial linear initial conditions relative to the vector of the system parameters are studied. Necessary and sufficient conditions are formulated in the form of criteria for estimating tolerances on parameters covering the case of fixed initial conditions. The tasks of estimating the maximum volume of the stability region with respect to the deviations of the state vectors and system parameters are considered. For the case of compatible admissible constraints, the paper gives the corresponding numerical calculations for the upper estimates. In particular, for fixed initial conditions, the maximum set of tolerances for system parameters with compatible dynamic restrictions on fluctuations of state vectors and parameters are determined according to these evaluation criteria. From the standpoint of practical stability in direction, direct sensitivity problems are investigated, numerical estimates of the spread of the phase coordinate vector of the system in the presence of linear and fixed initial conditions relative to the parameter vector are given. It has been demonstrated that in the given specification of the problem of maximum estimation of tolerances it is completely covered by problem statements of practical stability by direction. Thus, to calculate areas of guaranteed sensitivity, the concept of practical stability in a single direction is extended to the space of sensitivity functions at the initial moment of time. The above algorithms are used to estimate the range of tolerances for the adjustment parameters of the discrete model of the induction acceleration system with the given limitations on the spread of the quality criterion; the variation of the quality indicator within the tolerance field is presented in the form of a linear form relative to the spread of the parameter vector.

Quantum Binary Improved Artificial Bee Colony Algorithm to Solve the Spanning Tree Construction Problem in Vehicular Ad hoc Network

Quantum Binary Improved Artificial Bee Colony Algorithm to Solve the Spanning Tree Construction Problem in Vehicular Ad hoc Network

Government-Led Rural Planning And Construction In China: An Empirical Study From Jiangsu Province

Abstract With the expansion of investment in rural resources by the China government, it has become the main force supporting rural development initiatives, and government-led efforts have become an important angle for studying current Chinese rural development. This article takes the characteristic idyllic countryside construction in Jiangsu Province as the research object, analyzing the role played by the government in various stages of its construction practice, and forming a clear path for characteristic idyllic countryside construction. Furthermore, it combines practical village analysis to identify issues with the current “top-down” government-led characteristic of idyllic countryside construction. The study finds that the core reason for construction problems in practice is the neglect of village self-organizing capacity and insufficient alignment with actual village needs in the “top-down” construction path. This can be addressed through nurturing “bottom-up” village self-organizing capacity and optimizing the characteristic idyllic countryside construction system and path.

Problems and challenges of using randomized automatically evaluating geometric construction problems in Moodle LMS

<abstract><p>The objective of this paper was to examine the present state of geometric constructions in both international and national mathematics assessments. Additionally, it aimed to shed light on the noticeable lack of geometric construction items in these assessments and propose a solution to incorporate such items by utilizing a web-based mathematics assessment tool. After providing a brief summary of the unique benefits associated with geometric construction problems, the subsequent paper explored the development of a web-based mathematics assessment tool, the procedure for generating automatic evaluation GeoGebra applets for geometric construction problems, and their integration into Moodle learning management system (LMS). The purpose of this assessment tool was to enhance the evaluation of a substantially larger group of students within the realm of geometric constructions. The final section of the paper examined the difficulties encountered in the creation of the automatic evaluation applets and their incorporation into Moodle LMS. Through the development of such a web-based mathematics assessment tool, we enabled the evaluation of a significantly larger number of students, thus aiding not only national and international mathematics examinations but also assisting mathematics teachers in tracking students' scores and progress.</p></abstract>

Experimental and Numerical Investigation of a Real Four‐Story Building with an Open Ground Floor in a Seismic Region for Proper Strengthening

Many existing buildings fail to meet the requirements of current earthquake resistance codes. Therefore, it is necessary to strengthen and/or upgrade such buildings. Strengthening and/or upgrading include adding new floors, parts, elements, etc. Modern codes usually do not reflect upgrading of existing buildings. These buildings may be damaged and require maintenance and repairs, which may change the original material and structural properties. Design of such buildings is based on dominant vibration periods obtained by empirical dependences according to the building codes or from dynamic numerical analysis using available software. In both cases, the results usually do not consider the present state of the structure, influence of nonstructural elements, and possible differences in material properties in various elements of the building due to construction problems, concrete creep, etc. Such evaluation can be done just based on dynamic analysis, experimental and numeric, whereas the first one is essential. Therefore, the present research is aimed at numerical and experimental investigation of an existing real multistory residential reinforced concrete building before its strengthening and/or upgrading according to the requirements of modern seismic codes. The present study is a first stage of the research. It is focused on obtaining the dynamic parameters of the building before its strengthening and upgrading. Experimental values of natural vibration periods and damping ratios are compared with those obtained numerically. Following these values, the design spectrum of the seismic code is updated and the building is designed using this updated spectrum. The findings of this study form a basis for the second research stage that will be aimed at monitoring and analyzing of this building at each stage of its strengthening and upgrading. This approach iaimed at improving the available techniques for strengthening and upgrading the building. It will also be the basis for further research in this direction.

Exploration of Innovative Paths in Higher Education Management under the Background of New Media

In the era of rapid development of internet new media information interaction technology, various universities have also relied on new media technologies such as online MOOC platforms, Weibo, WeChat, DingTalk, etc., combined with the "online and offline" integrated teaching concept, to reform and innovate the existing subject education, ideological and political education, and employment guidance education models on campus, in order to improve the quality of professional course education, ideological and moral education, and behavior management for college students. Starting from the perspective of "comprehensive education" and information transformation development in higher education management, this paper explores the problems of insufficient systematic institutional system construction, inadequate construction of new media platforms, absence of new media management teams, and outdated management content and methods in current education management for student groups. Based on this, guided by constructivist theory and mass communication theory, and based on new media technology, it strengthens the management platform of new media education in universities The innovative construction of educational management content and workflow drives the improvement of efficiency and quality in educational management work.

Матрица расстояний между российскими регионами и её использование в экономическом анализе

The spatial factor plays an important role in solving many practical problems of modern economics — from the analysis of trade and migration to the study of the dynamics of regional prices and the spread of epidemics. At the same time, the method of calculating the distance matrix plays a very important role. Countries and even regions are not point objects, and economic activity in them is distributed all over the territory, but the distance is measured between two points. In addition, the distance between points can be calculated along a straight line (great circle arc), roads and railways, or by some synthetic method. Special attention is paid to the regions without railroad connection. The paper considers the main problems of distance matrix construction and possible ways to solve them. As a result, we recommend a distance matrix that can be used by all specialists in spatial economics.

From Turning Points to Teacher Identity Learning Environments: Late-Career Language Teachers Speak Up

Although learning is usually associated with some regulatory bodies, external education, programmes or experts, there is another kind of learning which can be gained from reflection on a language teacher’s biography and their teacher identity learning in a professional environment. The present article focuses on the analysis of four veteran Polish late-career language teachers of English, French, German and Russian who share their language-teacher lives in in-depth narrative inquiry interviews with the author of this text. The article aims to find out how various language-related critical incidents, or turning points, that took place in these teachers’ lives have affected their succeeding professional lives, and their individual perception of the language-teacher identity learning environments available to them. From the analysis of the data, four teacher identity constructions have been distinguished: “the constructive problem solver”, “the comfort minder”, “the perceiver of language-related social injustice” and “the language learner”, and it transpires that the teachers’ previous experiences are likely to affect how and why other things happen. This finding may have vital pedagogical implications for language-teacher educators, as the construction of teacher identities that are related to the participants’ meaningful and unique past experiences may question the sense of developing one universal language-teacher identity.

Analysis of face stability for shallow shield tunnels in sand

The stability of the tunnel face is the key problem in shield tunnel construction. This paper focuses on the face stability of a shallow tunnel in sand. Numerical simulation and theoretical analysis are combined to study the limit support pressure and failure zone. Firstly, numerical simulation is employed to study the collapse of the tunnel face, obtaining the limit support pressure and collapse zone. A new failure model suitable for shallow tunnels is constructed based on these numerical simulations. Then, an analytic solution for the limit support pressure is derived using limit analysis upper bound theory. The accuracy and applicability of this proposed model are verified by comparing it with numerical results and classical analytical models. Through this research, it is found that the proposed model provides a more accurate description of situations where soil arches cannot be formed for shallow tunnels in sand, leading to higher accuracy in calculating the limit support pressure. The influence of various factors on stability of the tunnel face is analyzed, revealing mechanisms of tunnel face collapse.