Influence of Loosely-Bonded Sandwiched Initially Stressed Visco-Elastic Layer on Torsional Wave Propagation

2016 ◽  
Vol 33 (3) ◽  
pp. 351-368 ◽  
Author(s):  
A. K. Singh ◽  
Z. Parween ◽  
A. Das ◽  
A. Chattopadhyay

AbstractAssumption that the common interfaces of the media are perfectly bonded may not be always true. Situation may arise that composition of the two medium may be responsible for weakening the contact between them. So, it becomes obligatory to consider a loosely bonded interface in such cases which may affect the propagation of elastic waves through them. This paper thrashes out the propagation of torsional surface wave in an initially stressed visco-elastic layer sandwiched between upper and lower initially stressed dry-sandy Gibson half-spaces, theoretically. Both the upper and lower dry-sandy Gibson half-spaces are considered to be loosely-bonded with the sandwiched layer. Mathematical model is proposed and solution in terms of Whittaker's and Bessel's function is obtained. Velocity equation is obtained in closed form, its real part deals with the dispersion phenomenon whereas its imaginary part provides the damping characteristics. Influence of heterogeneities, sandiness, gravity parameters, initial-stresses, loose-bonding and internal-friction on the phase and damped velocities of torsional wave are computed numerically and depicted graphically. Deduced dispersion equation and damped velocity equation matches with classical Love-wave equation and vanishes identically for the isotropic case respectively.

1969 ◽  
Vol 21 (01) ◽  
pp. 001-011 ◽  
Author(s):  
K Onoyama ◽  
K Tanaka

SummaryThe tissue fibrinolysis was studied in 550 specimens of 7 kinds of arteries from 80 fresh cadavers, using Astrup’s biochemical method and Todd’s histochemical method with human fibrinogen.In the microscopically normal aortic wall, almost all specimens had the fibrinolytic activity which was the strongest in the adventitia and the weakest in the media.The fibrinolytic activity seemed to be localized in the endothelium.The stronger activity lay in the adventitia of the aorta and the pulmonary artery and all layers of the cerebral artery.The activity of the intima and media of the macroscopically normal areas seemed to be stronger in the internal carotid artery than in the common carotid artery.Mean fibrinolytic activity of the macroscopically normal areas seemed to decrease with age in the intima and the media of the thoracic aorta and seemed to be low in the cases with a high atherosclerotic index.The fibrinolytic activities of all three layers of the fibrous thickened aorta seemed to decrease, and those of the media and the adventitia of the atheromatous plaque to increase.The fibrinolytic activity of the arterial wall might play some role in the progress of atherosclerosis.


2020 ◽  
Vol 11 (SPL1) ◽  
pp. 907-912
Author(s):  
Deepika Masurkar ◽  
Priyanka Jaiswal

Recently at the end of 2019, a new disease was found in Wuhan, China. This disease was diagnosed to be caused by a new type of coronavirus and affected almost the whole world. Chinese researchers named this novel virus as 2019-nCov or Wuhan-coronavirus. However, to avoid misunderstanding the World Health Organization noises it as COVID-19 virus when interacting with the media COVID-19 is new globally as well as in India. This has disturbed peoples mind. There are various rumours about the coronavirus in Indian society which causes panic in peoples mind. It is the need of society to know myths and facts about coronavirus to reduce the panic and take the proper precautionary actions for our safety against the coronavirus. Thus this article aims to bust myths and present the facts to the common people. We need to verify myths spreading through social media and keep our self-ready with facts so that we can protect our self in a better way. People must prevent COVID 19 at a personal level. Appropriate action in individual communities and countries can benefit the entire world.


2021 ◽  
pp. 000276422110055
Author(s):  
Marçal Sintes-Olivella ◽  
Pere Franch ◽  
Elena Yeste-Piquer ◽  
Klaus Zilles

What is the opinion held by the European press on the U.S. election campaign and the candidates running for president? What are the predominant issues that attract the attention of European print media? Does Europe detest Donald Trump? The objective of the present study is to analyze the perception European commentators had of the 2020 race for the White House. The media, the audience, and European governments were captivated more than ever before by how the U.S. election campaign unfolded, fixing their gaze on the contest between Donald Trump and Joe Biden. Through a combined quantitative and qualitative methodology, a combination of content analysis and the application of framing theory (hitherto scarcely applied to opinion pieces), our research centers on exploring the views, opinions, and analyses published in eight leading newspapers from four European countries (France, Germany, Spain, and the United Kingdom) as expressed in their editorials and opinion articles. This study observes how the televised presidential debates were commented on, interpreted, and assessed by commentators from the eight newspapers we selected. The goal was to identify the common issues and frames that affected European public opinion on the U.S. presidential campaign and the aspirants to the White House.


Author(s):  
Angela de Castro Gomes

The first decades of the 21st century brought back to the international arena a family of terms well known in Latin America to designate both styles of politics and the leaders who embodied them: populism and populists. Brazil is seen as a paradigmatic example of this type of experience, called “classic populism,” for two periods of its history, corresponding to its process of transition from a “traditional” society to a “modern” economy and society. The first period ran from the 1930 revolution until 1945, with the fall of the Estado Novo and the removal of its “leader,” Getúlio Vargas. The latter period covered the 1950s, “the golden years of populism,” since, despite the socioeconomic development achieved, democracy did not manage to establish itself in the country. The populist interpretation of this period of Brazilian history was formulated and shared by academia, essentially after the 1964 coup, and was dominant in the 1960s and 1970s. However, it extended these frontiers, using the language of the media, political conflicts, and the common sense of Brazilians. Widely used, the concepts of populism and populist were conflated with the events and characters they name, only being critiqued in the 1980s and 1990s. Since then, the number of scholars seeking other references has grown, whether redrafting the meanings of the original proposal, the case of the “populist political system,” or abandoning it completely, in the example of the “trabalhista pact.” In this dense debate, one constant can be observed: in Brazil populism became a “category of accusation,” translating negative values present in the “other” to whom one is referring. Although many academic studies do not use this pejorative tone, it is so consolidated in Brazilian politics that it has become part of the political culture of parties and trade unions, circulating widely.


2020 ◽  
Vol 128 (5) ◽  
pp. 627
Author(s):  
О.Н. Гапоненко

The questions regarding the measurements of the integral characteristics of the scattering function for the media with the strong forward scattering are considered. It is shown that in the common case the contribution of the small angles in the average scattering cosine is underestimated, whereas this contribution is important for the dominant forward scattering. The method that allows to obtain the necessary corrections for such case is proposed.


2018 ◽  
Vol 9 ◽  
pp. 135-143
Author(s):  
Anna Hłuszko

Shock content as a manipulative component of conflict discourseDifficult socio-political situation in Ukraine creates specific media discourse, which in turn gives rise to a number of phenomena, connected to information war categories, war of meanings, hate speech etc. Active entry of military issues into web news content affects traditional approach to the media-text drafting. The report examines the trends of shock visual content and its announcement in the web headlines. The influence of the content emotionalization, which is one of the common features for conflict discourse, not only on text style, but also on features of page making, selection and use of photo illustrations, headline creation, is studied. The material covering military developments usually involve deaths, injuries, loss, destruction of settlements as a result of hostilities, that is, they focus on information on suffering of both military and civilians. This results in stronger integration of shock visual content into the news, which in turn may be used as manipulation and propaganda tool. On the one hand it is used to demonstrate crimes of the enemy, on the other — as an evidence of Ukrainian military success. From the point of view of ethic and humanism the justification of such tactic is doubtful in both cases. However, the study shows that open image of death, blood, injuries in the materials and the announcement of such content in headlines are the cause of high popularity of such publications, and this mainstreams the problem of dehumanizing impact both on material’s subjects and on media audience.


Intersections ◽  
2020 ◽  
Vol 6 (2) ◽  
Author(s):  
Anna Malewska-Szałygin

Typical conversations about political matters are charged with emotion. Political matters are understood here as a thematic field involving talks about central authorities and parliament, as well as comments on news provided by the media. Talks about this topic often occur during neighborly meetings and family or social gatherings. I conducted ethnographic interviews to analyze how rural inhabitants talk about such political matters. During the interviews, especially polyphonic ones, I observed the accom-panying emotions, such as raised voices, faces bloodshot with irritation, lively gestures, the use of irony, and sometimes vulgar language and swearing. Anger, resentment, anxiety, fear, contempt, hostility, and even hatred were unmistakable signals of emotional involvement in political matters and engagement in debate about the common good and public affairs. Thus, the question arises: are such conversations a form of civility?


2018 ◽  
Vol 3 (1) ◽  
pp. 11-30
Author(s):  
Nisa Rizkiah ◽  
Andi Suwirta ◽  
Encep Supriatna

ABSTRAKSI: Pers mahasiswa menjadi media alternatif pada masa pemerintahan Orde Baru (1966-1998). Pers mahasiswa mampu dan berani melakukan kritik terhadap pemerintah melalui tulisan dalam media yang diterbitkannya. Dengan menggunakan metode historis, hasil penelitian menunjukan bahwa pers mahasiswa Indonesia, pada periode tahun 1990-an, mulai menunjukan kembali jatidiri dan perannya. “Isola Pos” di Bandung lebih menitikberatkan pemberitaan pada isu-isu besar pendidikan, hal ini karena pendidikan harus dikelola secara benar, jangan dipolitisir, dan harus sesuai dengan cita-cita para pendiri negara-bangsa. Sedangkan “Balairung” di Yogyakarta lebih dominan pada isu-isu politik, karena ianya merupakan langkah untuk melakukan perubahan dalam konteks sosial-politik sebuah negara-bangsa. Meskipun dari segmentasi berita yang diambil berbeda, namun ada benang merah di antara keduanya, yakni sama-sama memiliki tujuan untuk perubahan Indonesia ke arah yang lebih baik, serta melakukan perlawanan terhadap suatu rezim yang dianggap menyimpang dari kebijakan dan cita-cita bersama.KATA KUNCI: Pers Mahasiswa; Pendidikan; Politik; Pemerintah Orde Baru; Kritik Sosial. ABSTRACT: “Students’ Voice of Two Cities: Comparison on Views of Isola Pos in Bandung and Balairung in Yogyakarta toward Political Issues in Indonesia, 1991-1998”. The student’s press was an alternative media during the New Order government (1966-1998). The student’s press was capable and daring to criticize the government through the publication of articles in the media. By using the historical method, this study shows that student press in the period of 1990s, began showed again its identities and roles. The “Isola Pos” in Bandung was choosing more dominant on educational issues, due to that education must be managed properly, not be politicized, and must accordance with the ideals of nation-states’ founders. While “Balairung” in Yogyakarta was more dominant in political issues, due to it was as a step to make changes in the socio-political context. Although the news taken from different segments, but there are the common substances between them, namely they have a goal to change Indonesia into a better direction and the resistance to a regime that is wrong in policy and common ideals.KEY WORD: Student Press; Education; Politics; New Order Government; Social Critics.     About the Authors: Nisa Rizkiah, S.Pd. adalah Alumni Departemen Pendidikan Sejarah FPIPS UPI (Fakultas Pendidikan Ilmu Pengetahuan Sosial, Universitas Pendidikan Indonesia) di Bandung. Andi Suwirta, M.Hum. dan Dr. Encep Supriatna adalah Dosen di Departemen Pendidikan Sejarah FPIPS UPI di Bandung, Jawa Barat, Indonesia. Penulis bisa dihubungi melalui emel di: [email protected] Citation: Rizkiah, Nisa, Andi Suwirta Encep Supriatna. (2018). “Suara Mahasiswa dari Dua Kota: Perbandingan Pandangan Isola Pos di Bandung dan Balairung di Yogyakarta terhadap Isu Politik di Indonesia, 1991-1998” in MIMBAR PENDIDIKAN: Jurnal Indonesia untuk Kajian Pendidikan, Volume 3(1), Maret, pp.11-30. Bandung, Indonesia: UPI [Indonesia University of Education] Press, ISSN 2527-3868 (print) and 2503-457X (online). Chronicle of the article: Accepted (January 15, 2018); Revised (February 17, 2018); and Published (March 30, 2018).


2020 ◽  
Vol 42 (7-8) ◽  
pp. 1293-1308
Author(s):  
Amal Jamal ◽  
Noa Lavie

This article explores the complexity of minority creative workers in the media industry. It challenges the common notion in the literature that minority creative workers are fully submissive to the dominant power structure and examines whether such workers could still be conceived as active agents by resisting submission and marginalization even when they cannot influence their own representation in hegemonic media texts. To answer this question, it explores the performances of minority creative workers in a hegemonic cultural industry. To determine whether one can speak of subaltern agency and, if possible, examine how it manifests itself in reality, it addresses the daily performances of Palestinian creative workers during the production of the second season of the Israeli television series, Fauda. Observations conducted during production demonstrate that since in such contexts minority creative workers cannot avoid being projected in negative roles in the media text, they adopt creative subversive practices of passing and transgressive mimicry, resisting full compliance with the production, without endangering their own position. By doing so, the article contributes not only to the emerging field of creative entrepreneurship in cultural production, but also enables determination of common practices of creative subversion in the cultural industries.


2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Yangyang Fu ◽  
Yadong Xu ◽  
Huanyang Chen

Abstract In common media, electromagnetic wave always possesses a fluctuant field variation, analogous to an undulant surface of sea. While electromagnetic wave in the media with zero index metamaterials (ZIMs), whose refractive indices are near zero, homogeneous or constant field distribution will emerge, resembling a tranquil surface of lake. Such impression almost could be found in all previous literatures related to ZIMs. However, in this letter, we theoretically and numerically find that, in a cavity structure with ZIMs, when higher order modes (e.g., dipole modes) are excited inside cavity, inhomogeneous field could take place in ZIMs. Such a finding challenges the common perception in ZIMs: It is generally considered that homogeneous or constant field is generated in ZIMs. In addition, the proposed cavity structure herein could be used to manipulate radiation of light, such as enhancing or suppressing radiation, controlling radiation pattern and achieving isotropic or directive radiation, thereby potential applications are expected. These effects are well confirmed by numerical simulations.


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