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Building Construction Labour Productivity in Arid Climate Environment

Abstract

Productivity is a significant aspect of construction industry that plays vital role for success and failure of any construction project. This industry generates 11% to 13% of GDP all around the globe and the cost of labour in any building project is 20% to 35% of the cost of Building. On daily basis labour utilizes 30% of time on productive activities rest 70% of the time is ruined in non-productive activities, there are multi factors which are affecting the labour production in construction industry hence this study provides an overview of productivity, Total Factor productivity, method used to measure accurate productivity in construction projects. The objective of this study is find out percentage up to what extent labour production is affected due to weather conditions, however this study is carried out in arid climate region in Month of June 2018, where minimum temperature was recorded 26.0 Celsius degree at 7:30 AM and Maximum was 47.80 Celsius degree at 3:00 PM. A descriptive survey research design approach was adopted using continuous observation method of study. Project work study manual served as the research instrument to collect the data on selected building sites for 30 working days. Data collected were analyzed using descriptive statics. The results show that average monthly production of mason gang was recorded with less production of 28.759%, Carpentry gang with average monthly loss of production 16.74% & steel fixer gang had average monthly loss of production was 12.188. This concludes that prior to signing the contract for construction project. The location, environment, topography of region, capacity of construction operatives must be kept in mind to decide the proper timeline for the successful of project.

Open access
Carpatella rossica sp. nov., a new Late Paleocene–Eocene dinoflagellate species from European Russia and Ukraine

Abstract

Palynological study of two Paleogene core sections from the Voronezh and Rostov regions (SW Russia) and one outcrop in Ukraine revealed the presence of a new Late Paleocene–Eocene species, Carpatella rossica sp. nov. The new species is attributed to the genus Carpatella because of the presence of both apical and antapical horns. However, it is suggested that the taxon represents some features transitional between the three genera of the “Aptiana–Ventriosum complex” of Helenes (1986). Based on the observation of a thin smooth inner layer of the wall in some specimens of Carpatella rossica sp. nov., and given some morphological features of other species described after 1988, a new emendation of the genus Carpatella (Grigorovich 1969) Damassa 1988 is proposed here.

Open access
CFD Approach to Modelling Hydrodynamic Characteristics of Underwater Glider

Abstract

Autonomous underwater gliders are buoyancy propelled vehicles. Their way of propulsion relies upon changing their buoyancy with internal pumping systems enabling them up and down motions, and their forward gliding motions are generated by hydrodynamic lift forces exerted on a pair of wings attached to a glider hull. In this study lift and drag characteristics of a glider were performed using Computational Fluid Dynamics (CFD) approach and results were compared with the literature. Flow behavior, lift and drag forces distribution at different angles of attack were studied for Reynolds numbers varying around 105 for NACA0012 wing configurations. The variable of the glider was the angle of attack, the velocity was constant. Flow velocity was 0.5 m/s and angle of the body varying from −8° to 8° in steps of 2°. Results from the CFD constituted the basis for the calculation the equations of motions of glider in the vertical plane. Therefore, vehicle motion simulation was achieved through numeric integration of the equations of motion. The equations of motions will be solved in the MatLab software. This work will contribute to dynamic modelling and three-dimensional motion simulation of a torpedo shaped underwater glider.

Open access
City Nature Challenge
Open access
Communication and didactics, the difficult but needful symbiosis in higher education systems

Abstract

The first purpose of the university system is to deliver qualitative education through solid didactics/educational, but not many university structures seem really interested in the subject.

Sets of laws, measures, rules, and prescriptions of all kinds are in fact relegating it to a corner, making it less and less central and effective while also increasing the difficult to decipher, update and innovate it.

As a matter of fact, the issue of modernization of teaching methods has been tackled decisively by the European Commission, which has placed it among the priorities of its agenda. By acting in this way, EU is manifesting the conviction that a better quality for higher education will determine a growth in development and competitiveness not only for the Union itself but also for the individual universities that will define a strategy to improve the level of their teaching and learning and to give equal importance to research and teaching.

In its report on the theme of modernization and quality of teaching and learning, the European Commission summarizes its conclusions in 16 recommendations, including:

- the need for adequate teaching training for teachers;

- the need for the merits of teachers who make a significant contribution to improving teaching and learning methods to be recognized and rewarded.

But in order to achieve such quality prospects, it is necessary for university teachers to combine the knowledge of their discipline with specific communicative, cognitive and, more generally, relational skills. All this must become a principle of the university teaching of the future.

However, on a practical level, it is not uncommon to meet teachers who are not sufficiently attentive to these dimensions of the teaching-learning dynamic, failing to identify the “language” capable of transferring their theoretical/practical knowledge in the function of real learning of the student.

Open access
Comparative Analysis of Macro- and Microstructure of Printed Elements in the FDM, SLS and MJ Technologies

Abstract

The article presents research conducted with the project: ‘Additive manufacturing in conduction with optical methods used for optimization of 3D models’’ [2]. The article begins with the description of properties of the materials used in three different additive technologies – Fused Deposition Modelling (FDM), Selective Laser Sintering (SLS) and Material Jetting (MJ). The next part focuses on the comparative analysis of macro- and microstructure of specimens printed in order to test selected materials in additive technologies mentioned above. In this research two types of specimens were used: dumbbell specimens and rectangular prism with hole specimens. In order to observe macrostructure specimens, they were subjected to load test until it broke. In the case of observing microstructure, they were cut in some places. Each of described additive technologies characterizes by both different way of printing and used materials. These variables have a significant influence on macro- and microstructure and fracture appearance. FDM technology specimens printed of ABS material characterized by texture surface appearance. SLS technology specimens printed of PA12 material characterized by amorphous structure. MJ technology specimens printed of VeroWhite Plus material characterized by fracture appearance which had quasi- fatigue features. The microstructure of these specimens was uniform with visible inclusions.

Open access
Comparison of Composite Laminates Machining Methods and its Influence on Process Temperature and Edge Quality

Abstract

The article presents the description of technological trials and the results of three methods of machining carbon fiber reinforced composites panels. It also reviews the literature concerned heat affected zone in composites and its influence on material properties. As a part of the research, the cutting method using diamond coated saw was tested, as well as the milling method with two different types of carbide milling cutters. The processing of the panels was done using 4-axis CNC machine with special adapter for cutting discs in Composite Testing Laboratory (Center for Composite Technologies, Warsaw Institute of Aviation). The methods were compared in terms of machined edge quality and panel temperature during the processes. For this purpose, thermocouples were mounted into panels. Records from thermocouples were included. Edge quality and surface roughness have been checked by microscopic observation. Additionally, samples machined by each evaluated processing method were tested using differential scanning calorimetry (DSC). The method was used to determine the glass transition temperature of the tested material. The article conclusions contain a comparison of three processing methods in terms of cutting quality, process temperature, processing method productivity as well as DSC tests results.

Open access
The composition and age of the Ul’ya flora (Okhotsk-Chukotka volcanic belt, North-East of Russia): paleobotanical and geochronological constraints

Abstract

The Ul’ya flora comes from the Amka Formation of the Ul’ya Depression, located in the Okhotsk–Chukotka volcanic belt (North-East Russia). This flora includes ~50 species, among which conifers predominate. Ferns and angiosperms are also diverse. The Ul’ya flora is characterized by high endemism and by the presence of numerous Early Cretaceous relicts (Hausmannia, Podozamites, Phoenicopsis, Baiera, Sphenobaiera). Four new endemic species of conifers from the Ul’ya flora are described: Elatocladus amkensis Golovneva, sp. nov., Araucarites sheikashoviae Golovneva, sp. nov., Elatocladus gyrbykensis Golovneva, sp. nov. and Pagiophyllum umitbaevii Golovneva, sp. nov. Two-lobed leaves of Sphenobaiera are assigned to S. biloba Prynada based on their epidermal structure. Because of its systematic composition the Ul’ya flora is correlated with the Coniacian Chaun flora of Central Chukotka, with the Coniacian Aliki flora from the Viliga–Tumany interfluve area, and with the Coniacian Kholchan flora of the Magadan Region. The U-Pb age of zircon (ID-TIMS method) from plant-bearing tuffites within the Amka Formation at the Uenma River is 86.1 ± 0.3 Ma. Thus, Coniacian age (most likely the end of the Coniacian, near the Coniacian/Santonian boundary) is assigned to the Ul’ya flora and plant-bearing pyroclastic deposits of the Amka Formation on the basis of paleobotanical and isotopic data.

Open access
Crucial Directions of the Development of Continuing Education in Russia. Aspects of Quality

Abstract

The development of the lifelong education system is one of the most important areas of educational activity, which implies the continuity of processes in the systems of preschool, general secondary, primary, secondary, higher, postgraduate and additional professional education. The effectiveness and the possibility of educational activities are determined by the interconnections between the various stages of the innovation cycle, producers and consumers of services; firms, market, government and other social partners. Continuing education can be seen as part of a lifelong learning concept. Continuing education is not just a pedagogical system, characterized by certain structural features, functional relationships and teaching technologies, but also a specific component of the whole society. It becomes continuous, connected with life, and not just final, prescribed to a person during his studies at school, secondary school or university. The development of the lifelong education system allows creating all the necessary conditions to ensure the response of the education system to the dynamically changing needs of the individual, society, and the economy. In addition, many scientists note that the continuing education system plays an important role in the formation of personnel for the innovative development of Russian regions. The development of the lifelong education system is aimed at supporting the competent development of the individual, at implementing the concept of developing education. A competency-based approach to education creates all the necessary conditions for the diverse development of the individual, the formation of competencies and personal qualities that allow effective action in various life situations. The concept of lifelong education is based on the principles of continuity, flexibility, fast dynamics associated with changing needs in the labor market, for the implementation of education “not FOR life, but THROUGH life”. The article is devoted to the problem of implementation of continuing education in Russia and its impact on the quality of education in our country.

Open access
Databáze antropologického podsbírky
Open access