Nonlinear FEM Analysis of Experimentally Tested Flat Slabs with Openings

2019 ◽  
Vol 292 ◽  
pp. 191-196 ◽  
Author(s):  
Tomáš Augustín ◽  
Ľudovít Fillo ◽  
Jaroslav Halvonik
Keyword(s):  
Model Calibration ◽  
Fem Analysis ◽  
Linear Analysis ◽  
Experimental Results ◽  
Nonlinear Fem ◽  
Flat Slabs ◽  
The World ◽  
The Face ◽  
Effective Depth ◽  
Reference Specimens

Experimental programs focused on the issues related to the flat slabs still attract the attention of the scientists around the world. At the Central Laboratories of STU in Bratislava, together 8 fragments of the flat slabs were tested, focusing on the influence of the openings on the punching resistance. The two reference specimens were without openings and the others had two symmetrically placed openings. The openings were moved from the face of the column in multiples of the effective depth (0d, 1d, 2d). For the assessment of the tests, the models introduced in the relevant standards and codes were applied. The experimental results were also used for NFEM model calibration. The paper will deal with comparison of the theoretical and experimental results as well as with non-linear analysis that was performed in the ATENA FEM program, with the goal to obtain the most realistic behaviour of the flat slabs with openings. The material properties used in the analysis were obtained from the laboratory tests.

scholarly journals Nonlinear Analysis of Compressed Concrete Elements Reinforced with FRP Bars

Materials ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 4410
Author(s):  
Małgorzata Wydra ◽  
Maria Włodarczyk ◽  
Jadwiga Fangrat
Keyword(s):  
Reinforced Concrete ◽  
Fem Analysis ◽  
Negative Influence ◽  
Experimental Results ◽  
Nonlinear Fem ◽  
Steel Reinforced Concrete ◽  
Failure Loads ◽  
Frp Reinforcement ◽  
Concrete Elements ◽  
Frp Bars

Although fiber reinforced polymer (FRP) bars have proved their usefulness in the case of reinforced concrete flexural elements, there are still limited data on their performance in such structures under compression. Despite multiple benefits of using FRP bars as the reinforcement in concrete elements, their potential application as main reinforcement in compressed elements is still very controversial, mainly due to the limited amount of published research results. The presented work partly fulfills this knowledge gap. Two series of theoretical analyses—one based on the stress distribution in the cross-section and the second using the finite elements method (FEM)—with reference to the experimental results are presented. The analyses concern basalt FRP, glass FRP, and steel-reinforced concrete elements under axial compression. There are derived calculations of load–displacement relations and stress values in bars. Damage progression was analyzed as well. Main findings are as follows: (1) a good agreement between calculated failure loads and experimental results has been achieved; (2) potential negative influence of FRP reinforcement on the compressive capacity of the reinforced element should not be neglected; (3) nonlinear FEM analysis is useful in predicting the maximum value of load and damage zones; (4) stress values of only about 100 MPa (much lower than their compressive strength value) were obtained in non-metallic bars. The results might be useful for the further establishment of design rules.

scholarly journals Validating the correct wearing of protection mask by taking a selfie: design of a mobile application "CheckYourMask'' to limit the spread of COVID-19

2020 ◽  
Author(s):  
Karim Hammoudi ◽  
Adnane Cabani ◽  
Halim Benhabiles ◽  
Mahmoud Melkemi
Keyword(s):  
Infectious Disease ◽  
Decision Making ◽  
Mobile Application ◽  
Experimental Results ◽  
Old People ◽  
Feature Descriptors ◽  
The World ◽  
The Face ◽  
Key Features ◽  
First Time

In a context of a virus that is transmissive by sputtering, wearing masks appear necessary to protect the wearer and to limit the propagation of the disease. Currently, we are facing the 2019-20 coronavirus pandemic. Coronavirus disease 2019 (COVID-19) is an infectious disease with first symptoms similar to the flu. COVID-19 appeared first in China and very quickly spreads to the rest of the world. The COVID-19 contagiousness is known to be high by comparison with the flu. In this paper, we propose a design of a mobile application for permitting to everyone having a smartphone and being able to take a picture to verify that his/her protection mask is correctly positioned on his/her face. Such application can be particularly useful for people using face protection mask for the first time and notably for children and old people. The designed method exploits Haar-like feature descriptors to detect key features of the face and a decision-making algorithm is applied. Experimental results show the potential of this method in the validation of the correct mask wearing. To the best of our knowledge, our work is the only one that currently proposes a mobile application design ``CheckYourMask'' for validating the correct wearing of protection mask.

Study on Evaluation Procedures for Prestressed Concrete Bridges Damaged by Salt Attack with Severe Corrosion of PC Cables

2019 ◽  
Author(s):  
Koji Osada ◽  
Kiyohisa Ono ◽  
Masafumi Hattori ◽  
Shoji Nojima
Keyword(s):  
Prestressed Concrete ◽  
Fem Analysis ◽  
Highway Bridges ◽  
Concrete Bridges ◽  
Experimental Results ◽  
Nonlinear Fem ◽  
Prestressed Concrete Bridges ◽  
Design Formula ◽  
Evaluation Procedures

<p>Considering the management of highway bridges in service under severe conditions for more than 100 years, evaluation of safety is indispensable. By adopting design formulae, it is possible to evaluate the safety quantitatively without complicated processes. However, to adopt a formula from the design, the structure needs to satisfy the Navier hypothesis and other requirements. For these reasons, the authors carried out an examination of evaluation procedures to define the limit deterioration state of PC structures for adopting a design formula. By comparing evaluation results of a design formula and experimental results of an actual PC beam removed from service, and also nonlinear FEM analysis results, the study shows the limit deterioration state of PC structures for adopting a design formula for the evaluation of safety.</p>

scholarly journals Validating the correct wearing of protection mask by taking a selfie: design of a mobile application "CheckYourMask'' to limit the spread of COVID-19

2020 ◽  
Author(s):  
Karim Hammoudi ◽  
Adnane Cabani ◽  
Halim Benhabiles ◽  
Mahmoud Melkemi
Keyword(s):  
Infectious Disease ◽  
Decision Making ◽  
Mobile Application ◽  
Experimental Results ◽  
Old People ◽  
Feature Descriptors ◽  
The World ◽  
The Face ◽  
Key Features ◽  
First Time

In a context of a virus that is transmissive by sputtering, wearing masks appear necessary to protect the wearer and to limit the propagation of the disease. Currently, we are facing the 2019-20 coronavirus pandemic. Coronavirus disease 2019 (COVID-19) is an infectious disease with first symptoms similar to the flu. COVID-19 appeared first in China and very quickly spreads to the rest of the world. The COVID-19 contagiousness is known to be high by comparison with the flu. In this paper, we propose a design of a mobile application for permitting to everyone having a smartphone and being able to take a picture to verify that his/her protection mask is correctly positioned on his/her face. Such application can be particularly useful for people using face protection mask for the first time and notably for children and old people. The designed method exploits Haar-like feature descriptors to detect key features of the face and a decision-making algorithm is applied. Experimental results show the potential of this method in the validation of the correct mask wearing. To the best of our knowledge, our work is the only one that currently proposes a mobile application design ``CheckYourMask'' for validating the correct wearing of protection mask.

Power of Darkness: Narrative and Biographical Reflexivity in A Series of Unfortunate Events

2008 ◽  
Vol 1 (2) ◽  
pp. 200-212
Author(s):  
ELIZABETH BULLEN
Keyword(s):  
The Self ◽  
Risk Society ◽  
Project Risk ◽  
Young Readers ◽  
The World ◽  
The Face ◽  
High Earning ◽  
Textual Culture ◽  
Children’S Exposure ◽  
Central Claim

This paper investigates the high-earning children's series, A Series of Unfortunate Events, in relation to the skills young people require to survive and thrive in what Ulrich Beck calls risk society. Children's textual culture has been traditionally informed by assumptions about childhood happiness and the need to reassure young readers that the world is safe. The genre is consequently vexed by adult anxiety about children's exposure to certain kinds of knowledge. This paper discusses the implications of the representation of adversity in the Lemony Snicket series via its subversions of the conventions of children's fiction and metafictional strategies. Its central claim is that the self-consciousness or self-reflexivity of A Series of Unfortunate Events} models one of the forms of reflexivity children need to be resilient in the face of adversity and to empower them to undertake the biographical project risk society requires of them.

Persons in a World of Things

2018 ◽  
Author(s):  
Alan L. Mittleman
Keyword(s):  
Explanatory Power ◽  
The World ◽  
The Face ◽  
Classic Essay

This chapter focuses on the reality of persons in a world of things. It begins and ends with some relevant views drawn from the Jewish philosophers Buber (1878–1965), Heschel (1907–72), and Joseph B. Soloveitchik (1903–93). Framed by the Jewish concerns, it turns to a philosophical exploration of human personhood. The chapter begins by consiering Sellars's classic essay on the scientific and manifest images of “man-in-the-world.” Sellars shows how urgent and difficult it is to sustain a recognizable image of ourselves as persons in the face of scientism. With additional help from Nagel and Kant, it argues that persons cannot be conceptually scanted in a world of things. Notwithstanding the explanatory power of science, there is more to life than explanation. Explanation of what we are needs supplementing by a conception of who we are, how we should live, and why we matter. Those are questions to which Jewish sources can speak.

Too WEIRD, Too Fast: Preprints about COVID-19 in the Psychological Sciences

2020 ◽  
Author(s):  
Arathy Puthillam
Keyword(s):  
Overwhelming Majority ◽  
Global Pandemic ◽  
The Us ◽  
The World ◽  
The Face ◽  
Conducting Research ◽  
Psychological Studies

That American and European participants are overrepresented in psychological studies has been previously established. In addition, researchers also often tend to be similarly homogenous. This continues to be alarming, especially given that this research is being used to inform policies across the world. In the face of a global pandemic where behavioral scientists propose solutions, we ask who is conducting research and on what samples. Forty papers on COVID-19 published in PsyArxiV were analyzed; the nationalities of the authors and the samples they recruited were assessed. Findings suggest that an overwhelming majority of the samples recruited were from the US and the authors were based in US and German institutions. Next, men constituted a large proportion of primary and sole authors. The implications of these findings are discussed.

Aplikasi Kuartu Berbasis Android Sebagai Media Pertukaran Informasi Kartu Nama

2017 ◽  
Vol 9 (1) ◽  
pp. 25-32
Author(s):  
Nandi Syukri ◽  
Eko Budi Setiawan
Keyword(s):  
Mobile Devices ◽  
Information Exchange ◽  
Smart Phone ◽  
Black Box ◽  
Qr Code ◽  
Business Card ◽  
Large Numbers ◽  
The World ◽  
The Face ◽  
Index Terms

Business Card is the most efficient, effective and appropriate tool for every business men no matter they are owners, employees, more over marketers to provide information about their businesses. Unfortunately, it is very difficult to bring and manage business card in large numbers also to remember the face of the business card owner. A Business Card application need to be built to solve all those issues mentioned above. The Application or software must be run in media which can be accessed anywhere and anytime such as smart phone. Kuartu is as business card application run in mobile devices. Kuartu is developed using object base modeling for mobile sub system. The platform of the mobile sub system is android, as it is the most widely used platform in the world. The Kuartu application utilizing NFC and QR Code technology to support the business card information exchange and the Chatting feature for communication. Based on the experiment and test using black box methodology, it can be concluded that Kuartu application makes business card owner to communicate each other easily, business card always carried, easy to manage the cards and information of the business card owner can be easily obtained. Index Terms— Business Card, Android, Kuartu, NFC, QrCode, Chatting.

The Writings of Skryabin

2018 ◽  
Author(s):  
Simon Nicholls ◽  
Michael Pushkin ◽  
Vladimir Ashkenazy
Keyword(s):  
World View ◽  
Creative Activity ◽  
Creative Play ◽  
Religious Feeling ◽  
The World ◽  
The Face ◽  
Section Viii ◽  
The Universe ◽  
Final Text ◽  
Life Work

An introduction by Boris de Schloezer gives the genesis of the final text in the section, the Preliminary Action, and explains its relation to Skryabin’s projected life-work, the Mystery. Section I: an effusion of Orthodox religious feeling from teenage years. Sections II-VII: Around 1900, an expression of rejection of God in the face of disillusion is followed by the text of the choral finale of the First Symphony, declaring faith in the power of art. An unfinished opera libretto, symbolic in narrative, expressing belief in Art’s power to seduce and persuade. Three notebooks develop a world view in which the world is the result of the self’s creative activity. The creation of art and of the universe are identical. There is a higher self, identical with divinity. Forgetfulness of individuality leads to freedom and universal consciousness. Section VIII: The literary poem written during the composition of the symphonic Poem of Ecstasy summarises the scenario developed in the notebooks. Life starts with the desire to create, delight in creative play meets opposition, the creative goal is achieved and disappointment sets in. The process is repeated until it is realized that the struggle is itself joyful and self-affirmation is achieved. Section IX: The text of the Preliminary Action is symbolic in structure. Primal Male and Female Principles emerge; the Female is identified with Death. Life arises from the union of energies. Struggle and bloodshed follow. The conclusion is an impulse towards unification, the synthesis of experience and dematerialisation. Both the complete first draft and the incomplete revision are included.

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