Review on Precast Beam Column Joint

Building projects purvey many advantages by the use of precast concrete frame structures in expeditious construction, lowering formwork, upgrade construction condition, carbon emission depletion and environmental conservation. The behavior of precast concrete structures are subjected to different loading conditions. Loading conditions depend on type, location and the connections between elements. Exiguous strength and indigent ductility of the beam column joint create the weakest link in the structure, which the reason for failure of any kind of structures. So various literature have been reviewed to ensure the reliable connections between the beam column joints.

An IoT device for striking of vertical concrete formwork

PurposeTimely removal of formwork is one of the crucial aspects of construction management that directly influences the safety and quality of the structure as well as the economy of the project. Code recommendations in this regard are not widely practiced because of the difficulties in their implementations. Also, such code recommendations are not robust for all the possible construction conditions. The present paper proposes an IoT-enabled system that notifies the minimum striking time of vertical formwork based on a specified target compressive strength.Design/methodology/approachAn IoT device is proposed for the timely removal of vertical formwork by monitoring of early age concrete compressive strength in real-time. The maturity method is utilized for this purpose. The implementation of the proposed system is demonstrated on three concrete columns. The proposed system is found to be suitable for any construction condition.FindingsThe proposed system is a novel, cost-effective, IoT-enabled real-time monitoring system which includes features like cloud connectivity and remote monitoring. This system can be easily implemented at the site without any human intervention.Practical implicationsThe study explores the development of an IoT device for the timely removal of vertical formwork which will ensure quality, safety and productivity in concrete construction.Originality/valueThis paper is the first attempt to determine the minimum striking time of vertical formwork using IoT-based technology.

Middle Verbs and Their Acquisition

The ultimate goal of this paper is to provide an in-depth analysis of the L2 learners’ acquisition of middle constructions. One of the properties of middle constructions is that the subject of middle verbs must be a definite NP. Middle verbs can occur by revealing an intrinsic characteristic or property of the definite NP. In addition, middle verbs can only occur along with short adverbs such as well and easily. In this paper, we conduct a survey and evaluate the L2 learners’ responses to middle verbs. More specifically, we have examined how the L2 learners acquired the abstract constraint, the middle construction condition, the definite DP condition, and the adverb constraint. It is worth noting that 45% of the adult subjects acquired the definite condition, 32.5% of the L2 learners acquired the middle construction condition, 50% of the adult subjects acquired the abstract noun constraint, and 20% of the L2 learners acquired the adverb constraint. This in turn indicates that that the abstract noun constraint was first acquired by the adult subjects, followed by the definite DP condition, the middle construction condition, and the adverb constraint, in that order. With regard to middle verbs, it is significant to note that English are subject to the abstract noun constraint, the middle construction condition, the definite DP condition, and the adverb constraint, whereas Korean is not subject to the abstract noun constraint, the middle construction condition, and the definite DP condition. This in turn suggests that Korean is a superset language, compared to English. Thus, learning difficulty arises. Finally, this paper argues that unlike Chomsky’s UG hypothesis (Chomsky 1981, 1982, 2019a, 2019b), the L2 learners looked for similarities between L1 and L2 and thus relied on their L1.

Situace neprůmyslových venkovských brownfields v průběhu deseti let na příkladu okresu Jindřichův Hradec

The aim of the article is to summarize the main results of research conducted in 2005-2006 and 2015-2017, focused on non-commercial brownfields in rural areas on the example of the Jindřichův Hradec district. The buildings of the former schools, cultural houses and retail shops of Jednota were examined. These objects were found in 165 localities in a total of 336 objects. 69 of them were marked as so-called real brownfields, depressing their surroundings, mainly due to their poor construction condition. The second phase of the research examined changes occurred during a decade on selected 53 objects of real brownfields from the first research phase. The standardized observation, document analysis, semi-structured and in-depth interviews were used as data collection methods. Relatively variable situation of municipalities was identified. Active inhabitants, who taking care of cultural and social activities and facilities, as well as individual possibilities of using problematic objects proved to be the main factors of positive changes. The economically favorable situation after 2013 contributed to possibility of making the necessary building reconstruction. The use of public funds by municipalities was not frequent, mainly due to the non-existence of a suitable grant title or to the reluctance to run into debt and uncertainty of objects use. Nevertheless, the number of problematic objects decreased within examined decade and many of the objects found their use.

Optimization research on hinge points of the grader’s working device based on ADAMS

In order to study the hinge points load for grader’s working device, a multi-body dynamic model of the grader is established for analyzing the construction condition and obtain the load of each hinge point. The analysis method is verified by prototype test. Taking the force of the key cylinder as the optimization objective, the positions of all hinge points are optimized. The result show that the scheme reduces the maximum force of the key cylinder by 26.5%, which improve the stability of the grader.

The state of medical physics in Brazil demonstrated by research groups publications: an analytical example of bibliometrics used to investigate a scientific field | O estado da física médica no Brasil por meio das publicações de grupos de pesquisa: um exemplo analítico do uso da bibliometria para investigar um campo científico

RESUMO Este artigo aborda a condição de construção paradoxal do campo da Física Médica (FM) no Brasil através da análise de sua produção científica. Portanto, o objetivo é levantar o estado da arte da FM brasileira e a metodologia foi baseada em ferramentas de webscrapping e análise quantitativa e qualitativa para coletar e analisar dados em bancos de dados públicos e abertos que são referência em divulgação e comunicação tecnocientífica. Os resultados apontam para o fato de que as áreas da medicina e da física produziram em sua sobreposição um campo cujo conhecimento não necessariamente contribui para a consolidação de um suposto campo ou área independente da FM.Palavras-chave: Física Médica: Educação Superior; Grupos de Pesquisa; Bibliometria.ABSTRACT This paper addresses the paradoxical construction condition of the Medical Physics (MP) field in Brazil through an analysis of scientific production. Therefore, the objective is to understand the state of art of Brazilian MP and the methodology was based on webscrapping and quantitative and qualitative analysis tools to collect and analyze data in public and open database that are reference in dissemination and technoscientific communication. The results point to the fact that the areas of medicine and physics produced in their overlap a field whose knowledge does not necessarily contribute to the consolidation of a supposed field or area independent of MP.Keywords: Medical Physics; Higher Education; Research Groups, Bibliometrics.

AN ANALYSIS OF GREEN BUILDING COSTS USING A MINIMUM COST CONCEPT

Green buildings are known for yielding a better indoor habitat, saving energy and protecting the environment. However, they require greater investment than conventional buildings. Green buildings can be classified at different levels ranging through certified, silver, gold and platinum. The classification chosen is likely to affect project costs. Adopting a platinum level of green building specifications tends to incur the highest project costs. While with gold, silver and certified levels expenditure will be reduced accordingly. The actual degree of project cost differences also depends on additional factors, such as site location, design specifications, construction condition, material and equipment selection and LEED consultant expertise. Construction budgeting represents a crucial factor for project owners developing green buildings. This research presents a method for determining the minimum project costs of green building developments. The processes and steps to be completed in determining such minimum project costs are presented based on a case study of a learning centre building which received LEED platinum certification. It was found that choosing certified and silver levels has an indifferent effect on project costs, whereas expenditure increases exponentially with gold and platinum levels of certification.

Spatial Heterogeneous Characteristics of Ridesharing in Beijing–Tianjin–Hebei Region of China

Ridesharing is becoming popular in many cities in China where transportation alternatives are easily accessible. Individuals typically access services by smartphone app developed by ridesharing company to join a trip offered by other private vehicle’s drivers who share same or geographically close destination. However, there are some internal differences within this region indicating the service heterogeneity of ridesharing. In order to discover this regional heterogeneity, this paper chooses Beijing–Tianjin–Hebei (BTH) region as research target and uses BTH regional ridesharing data provided by DiDi Chuxing Company. Then, this paper conducts an in-depth study by summarizing the travel pattern characteristics and evaluating the environmental impacts that result from individuals participating in ridesharing services. Lifecycle analysis of fuel and environmental input–output are applied to estimate the direct and indirect environmental impact separately. The results reveal heterogeneous spatial heterogeneous of ridesharing, including travel pattern and environmental influence caused by service demand and supply, which results from the unbalance of regional development and infrastructure construction condition of the transportation system, and other travel behavior differences.