Historical background and evolution of Soil Mechanics

2021 ◽  
Vol 18 ◽  
pp. 96-113
Author(s):  
Philotheos Lokkas ◽  
Ioannis Chouliaras ◽  
Theodoros Chrisanidis ◽  
Dimitrios Christodoulou ◽  
Emmanouil Papadimitriou ◽  
...  

The behavior of soil either as a building material or as a load receiver is particularly important and presents a paramount significance in both infrastructure and building construction. Geotechnical engineering has shown a rapid development over the last fifty years and holds a prominent position in all scientific fields of engineers. This paper mainly aims at the historical background along with the progress made on Soil Engineering as an important branch of Surveyors, Civil and Mining Engineers, where, through an important citation of technical works and constructions over time, may be considered as a significant tool for teaching and education of students

2017 ◽  
Vol 33 (4) ◽  
pp. 1369-1384 ◽  
Author(s):  
David Lallemant ◽  
Henry Burton ◽  
Luis Ceferino ◽  
Zach Bullock ◽  
Anne Kiremidjian

This study proposes a framework for incorporating time-dependent fragility into large-scale risk assessment models, focusing on incremental building expansion as a significant driver of changes in vulnerability. In rapidly urbanizing areas in developing countries, the pay-as-you-go process of informal building construction and staged expansion is the de facto pattern of growth. While there is a common understanding that such expansions increase the earthquake vulnerability of buildings, this study proposes a framework to model and quantify this increase. Vulnerability curves are developed through incremental dynamic structural analysis for common building expansion typologies. Building expansions are modeled as Markov chain processes and used to simulate stochastic expansion sequences over a building's lifetime. The model is then used to simulate a hypothetical neighborhood in the Kathmandu valley area to understand neighborhood-level risk over time. The study provides a new methodology to analyze changing seismic risk over time, driven by any building modification that impacts the building's vulnerability (incremental expansion, deterioration, retrofit, etc.).


2018 ◽  
Vol 768 ◽  
pp. 306-313 ◽  
Author(s):  
Chun Zhi Zhao ◽  
Yi Liu ◽  
Shi Wei Ren ◽  
Jiang Quan

Concrete is the most extensively used material in building and civil project structure. With the rapid development of economic construction, urban construction and infrastructure construction increase year by year, so there is a greater demand for concrete, which brings the rapid development of ready-mixed concrete industry. During the rapid development, structural safety and durability problems caused by concrete quality appear frequently. Meanwhile, to implement the fundamental national policies of resource conservation and environment protection, according to Green Building Action Plan (GUOBANFA [2013] No.1) approved by CPC Central Committee and the State Council, besides meeting the quality requirements, ready-mixed concrete must also meet the green products requirements of "energy conservation, emission reduction, safety, convenience and recyclability" for the vigorous development of green building material and supporting the requirements for building energy conservation, green building and new-type urbanization construction. By quality testing, this paper elaborates the green assessment technology for ready-mixed concrete in combination with raw material quality control, design of mix ratio, production process quality control, construction process quality control, residual concrete treatment, hardened concrete quality control, and control of dust, noise and wastewater. The greening of ready-mixed concrete brings the production and application of green building material, promotes the transformation and upgrading of building material industry and drives the development of green building.


2020 ◽  
Vol 26 ◽  
pp. 00054
Author(s):  
Marina Listkova

The current difficult situation with the spread of the COVID 2019 virus forced us to take a new look at the workflow and rebuild medicine as well as the entire education system. The rapid development of computer technologies over the past ten years allows education to find a reasonable way out of a difficult situation. Thus, the existing system of distance education helped to continue students ‘education during the pandemic. The new format of education forced University lecturers (and other educational institutions) to look for the most appropriate and effective ways to implement the educational process. The Physical culture is not an exception. This article suggests and proves the most rational content of conducting remote physical education classes. They improve physical education help to maintain and strengthen the health of the younger generation.


2016 ◽  
Vol 54 (10) ◽  
pp. 2413-2432 ◽  
Author(s):  
Thomas Kenworthy ◽  
Jaydeep Balakrishnan

Purpose The purpose of this paper is to analyze more than three decades of theory testing published in leading operations management (OM) journals. Design/methodology/approach This piece examines the amount of theory testing, the extent to which theories are tested multiple times, and the disciplinary origins of the theories that are tested. Findings The analysis revealed that empirical OM researchers have increasingly responded to demands for more theory-driven knowledge over time. OM researchers are developing and using a wide array of domestic theories to understand empirical data. The examination also revealed a substantial focus on theory borrowed from other scientific fields. Originality/value The findings here suggest that OM is clearly a maturing discipline. As the discipline matures, it is important to consider to what extent borrowed theories and frameworks can offer value to OM. A preliminary vetting model is advanced in order to critically assess foreign theory. It is hoped that future screening promotes only the most useful non-domestic theory, thereby ensuring sufficient journal space for domestic theory and resulting in effective solutions to the pressing, practical problems of the OM field.


2019 ◽  
Vol 17 ◽  
pp. 394-407
Author(s):  
Cristian Ștefan Liușnea

In the present paper * we set out to analyze the concept of leisure, from the perspective of its historical evolution, to understand the content and meanings thatspecialists from different scientific fields propose or accept. Leisure activities have, over time, involved religious, cultural and sporting activities. The emergence of urban services offered by libraries, museums, sports fields, etc. is related to this concept. We consider that in the post-modern society, the problem of leisure is very important, today there is a major change reflected in the choices of people, who have less and less free time, and the rising costs of participating in leisure activities of a sporting nature, first, restrict access to them for a large part of the urban population, to whom it is mainly addressed. The concept of leisure is related not only to the social or economic domain, through the relation with the tourism activities or services, but also to culture, some authors even talking about a culture of leisure, through which people not only relax or relax. They have fun, but they also have access to values that are vital to personal development. Also, the concept of leisure is related to health, fitness (physical condition).


2021 ◽  
Vol 1 (1) ◽  
pp. 23-32
Author(s):  
Muhammad Natsir ◽  
Fauziah Khairani Lubis

This study deals with the phenomenon while language can be lost slowly if it can't be defended. This happens along with the rapid development of the era towards modernization which is feared that in the future, the Tanjung Balai Malay language, which is owned and proudly has been threatened with extinction over time, but what needs to be realized is that it does not mean to displace the position of Indonesian which has been agreed as the national language. This research took place in Tanjung Balai when in Tanjung Balai Malay language is used as the habitual language.  This study was conducted using descriptive with qualitative method purposed to find out the words as dysfunction verb in Tanjung Balai Language. Qualitative research was related to assisting in describing the common elements of the various forms of qualitative methods. Thirty dysfunctional Malay verbs were collected and analyzed as the data findings.


This chapter presents an introductory overview of the application of computational intelligence in biometrics. Starting with the historical background on artificial intelligence, the chapter proceeds to the evolutionary computing and neural networks. Evolutionary computing is an ability of a computer system to learn and evolve over time in a manner similar to humans. The chapter discusses swarm intelligence, which is an example of evolutionary computing, as well as chaotic neural network, which is another aspect of intelligent computing. At the end, special concentration is given to a particular application of computational intelligence—biometric security.


Author(s):  
Paul C. Okonkwo ◽  
Israr Ul Hassan ◽  
Wesam H. Beitelmal

The extraction of building materials from their resources through harvesting, preservation, and utilization has become a significant segment of human contribution to the global ecosystem since the industrial revolution. Bamboo is the world's fastest-growing woody plant, and bamboo grows multiple times quicker than most species. Housing is one of the focused demands for bamboo, and as a result of the current scarcity of home units, the demand for bamboo is increasing. Bamboo building construction is portrayed by a basic edge approach like that applied in traditional building design and construction. Applying bamboo as an environmentally friendly material is seen as a movement towards creating a sustainable environment and reducing greenhouse emissions. The need to employ government policy in addressing the production and application of bamboo is reported, and the challenges of bamboo in the global market are highlighted in this chapter.


2019 ◽  
Vol 60 (1) ◽  
pp. 373-383
Author(s):  
Eduard R. Müller

Johannes Bobrowski’s iconic poem BERICHT (REPORT) refers to an historical photograph showing the interrogation of a young Polish Jewish woman by officers of the German Wehrmacht in Brest-Litovsk. It has long been assumed that the woman referred to as Bajla Belblung was a resistance fighter who escaped from the Warsaw ghetto in 1943. But further research has shown that the interrogation took place in September 1939 after the end of the third week of the war. This work examines the historical background of the photos of Bajla Gelblung taken at that time as well how the photograph captions have changed over time. It also raises questions about the development of a legend, to which Bobrowski’s poem has made a decisive contribution.


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