Mechanics of “Bumps” in Coal Mines: A Discussion of Violent Deformations in the Sides of Roadways in Coal Seams

1987 ◽  
Vol 40 (8) ◽  
pp. 1033-1043 ◽  
Author(s):  
Horst Lippmann

Since long ago rock bursting has belonged to the most hazardous of events causing damage to material and loss of human life in underground cavities. Nevertheless, attempts to understand the physical principles of rock bursting from the point of view of the mechanical and material sciences seem to be of fairly recent origin. The following article deals especially with rock bursting in coal mines. After a general introduction, approaches based on a specific property of the excavated material called “proneness-to-bursting” are reviewed. This is followed by a survey of structural approaches to the problem. Finally, an elementary structural model is presented, leading to simple approximate conditions for the risk of initiating rock bursts, or for its efficiency.

2011 ◽  
Vol 15 (1) ◽  
pp. 63-88 ◽  
Author(s):  
Elwira Brygoła

The Threatened Identity: An Empirical Study This study explores the phenomenon of threatened identity that occurs because of significant, often abrupt changes in human life. As a result of a difficult experience, decision, change of cultural environment, loss of someone or something very important, an individual may feel he/she is someone different than before. Thus, establishing the continuity of one's personal identity may be a problem. In a report on this type of situation Glynis Breakwell (1986) proposes the term "threatened identity." She places it in the context of her structural model of identity. The present study is aimed at investigating possible images of threatened identity and characterizing them from the point of view of narrative sequences, the affective level and the ultimate - positive or negative - consequences of the individual's functioning. With regard to these aspects, five types of threatened identity have been distinguished from the empirical evidence: (1) the constructive re-evaluation, (2) the key experience, (3) the stable narrative sequence, (4) the seeking of power and autonomy and (5) the loss of part of oneself.


2020 ◽  
Vol 4 (1) ◽  
pp. 67-86
Author(s):  
Elisabeth Heyne

AbstractAlthough visual culture of the 21th century increasingly focuses on representation of death and dying, contemporary discourses still lack a language of death adequate to the event shown by pictures and visual images from an outside point of view. Following this observation, this article suggests a re-reading of 20th century author Elias Canetti. His lifelong notes have been edited and published posthumously for the first time in 2014. Thanks to this edition Canetti's short texts and aphorisms can be focused as a textual laboratory in which he tries to model a language of death on experimental practices of natural sciences. The miniature series of experiments address the problem of death, not representable in discourses of cultural studies, system theory or history of knowledge, and in doing so, Canetti creates liminal texts at the margins of western concepts of (human) life, science and established textual form.


Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4499
Author(s):  
Xiao Hu ◽  
Samuel Ricci ◽  
Sebastian Naranjo ◽  
Zachary Hill ◽  
Peter Gawason

Electrically responsive biomaterials are an important and emerging technology in the fields of biomedical and material sciences. A great deal of research explores the integral role of electrical conduction in normal and diseased cell biology, and material scientists are focusing an even greater amount of attention on natural and hybrid materials as sources of biomaterials which can mimic the properties of cells. This review establishes a summary of those efforts for the latter group, detailing the current materials, theories, methods, and applications of electrically conductive biomaterials fabricated from protein polymers and polysaccharides. These materials can be used to improve human life through novel drug delivery, tissue regeneration, and biosensing technologies. The immediate goal of this review is to establish fabrication methods for protein and polysaccharide-based materials that are biocompatible and feature modular electrical properties. Ideally, these materials will be inexpensive to make with salable production strategies, in addition to being both renewable and biocompatible.


Think ◽  
2021 ◽  
Vol 21 (60) ◽  
pp. 33-49
Author(s):  
William Lyons

The author sets out to respond to the student complaint that ‘Philosophy did not answer “the big questions”’, in particular the question ‘What is the meaning of life?’ The response first outlines and evaluates the most common religious answer, that human life is given a meaning by God who created us and informs us that this life is just the pilgrim way to the next eternal life in heaven. He then discusses the response that, from the point of view of post-Darwinian science and the evolution of the universe and all that is in it, human life on Earth must be afforded no more meaning than the meaning we would give to a microscopic planaria or to some creature on another planet in a distant universe. All things including human creatures on Planet Earth just exist for a time and that is that. There is no plan or purpose. In the last sections the author outlines the view that it is we humans ourselves who give meaning to our lives by our choices of values or things that are worth pursuing and through our resulting sense of achievement or the opposite. Nevertheless the question ‘What is the meaning of life?’ can mean quite different things in different contexts, and so merit different if related answers. From one point of view one answer may lie in terms of the love of one human for another.


1927 ◽  
Vol 23 (2) ◽  
pp. 258-258
Author(s):  
G. Baksht

From a social point of view, the problem of abortion was and is, perhaps, more topical today than ever before. The comprehensive coverage of this problem, which involves the most intimate aspect of human life, social and domestic conditions, and ethical issues, can only be the product of the collective efforts of physicians, sociologists, and lawyers.


Author(s):  
В. М. Волкова ◽  
Е. И. Скирмонт ◽  
Л. М. Смирнова ◽  
С. Б. Климашева ◽  
Е. Л. Зимина ◽  
...  

По данным ВОЗ, за последнее столетие продолжительность жизни человека значительно увеличилась во всем мире, но этот процесс неизбежно сопровождается старением. Поэтому лица, достигшие пожилого и старческого возраста, нередко становятся немощными, особенно в физическом плане. В итоге, таким людям всё труднее даются движения, связанные с самообслуживанием и передвижением, при пользовании типовой одеждой и обувью. В процессе обследования 55 пациентов 60-87 лет, проведённого впервые с позиций медико-социальной реабилитации, получены данные о характере ограничений физических возможностей этого контингента людей, существенно осложняющих использование ими типовой одежды и обуви. Основной вывод работы заключается в актуальности разработки медико-технических требований, предъявляемых к проектированию и производству одежды и обуви специально для данной категории людей с учетом их измененных антропометрических параметров и характерных для них функциональных ограничений. According to the World Health Organization, human life expectancy has increased signifi cantly around the world over the past century, but this process is inevitably accompanied by aging. Therefore, persons who have reached the elderly and senile age often become infirm, especially physically. As a result, such people find it increasingly difficult to make movements related to self-service and movement when using standard clothing and shoes. In a study of 55 patients (from 60 to 87 years), conducted for the first time from the point of view of medical and social rehabilitation, data were obtained that reveal the nature of physical limitations of this group of people, which significantly complicate them use of standard clothing and shoes. The main conclusion of the work is the relevance of the development of medical and technical requirements for the design and production of clothing and footwear specifically for the elderly and senile taking into account their changed anthropometric parameters and their characteristic functional limitations.


2018 ◽  
Vol 35 ◽  
pp. 01005 ◽  
Author(s):  
Van Thinh Nguyen ◽  
Waldemar Mijał ◽  
Vu Chi Dang ◽  
Thi Tuyet Mai Nguyen

Methane hazard has always been considered for underground coal mining as it can lead to methane explosion. In Quang Ninh province, several coal mines such as Mạo Khe coal mine, Khe Cham coal mine, especially Duong Huy mine that have high methane content. Experimental data to examine contents of methane bearing coal seams at different depths are not similar in Duong coal mine. In order to ensure safety, this report has been undertaken to determine a pattern of changing methane contents of coal seams at different exploitation depths in Duong Huy underground coal mine.


2020 ◽  
Vol 20 (1) ◽  
pp. 2-11
Author(s):  
Nilsen Aparecida Vieira Marcondes

Objetiva-se discutir neste breve intróito retrospectivo de revisão de normatizações constitucionais pátrias a tutela do animal doméstico. Esta síntese reflexiva sobre a tutela do animal doméstico brasileiro no âmbito constitucional se apresenta quanto à forma de abordagem do assunto, como qualitativo, no que tange a modalidade investigativa como básico, do ponto de vista de seus objetivos, como descritivo, com relação aos procedimentos técnicos, qualifica-se como documental e bibliográfico. Conclui-se que os delineamentos, os limites, bem como os avanços na conquista da tutela animal e consequentemente do animal doméstico demonstram o quanto o reconhecimento de tal questão é socialmente construído. Além disso, a expansão, a solidificação e o desenvolvimento contínuo também da vida humana e da sociedade implicam necessariamente na preservação e na ampliação de acesso um direito fundamental nominalmente reconhecido pela Constituição Federal de 1988 como direito ao ambiente ecologicamente equilibrado no qual se insere evidentemente a fauna, ou seja, os animais domésticos, domesticados, silvestres e exóticos. Palavras-chave: Animal Doméstico. Tutela. Constituições Federais. Brasil.  AbstractThe objective of this brief retrospective introjective review of constitutional norms is to discuss the protection of domestic animals. This reflexive synthesis about the protection of the Brazilian domestic animal in the constitutional scope presents itself as to the way of approaching the subject, as qualitative, in what refers to the research modality as basic, from the point of view of its objectives, as descriptive, with respect to the procedures technicians, qualifies as documentary and bibliographical. It is concluded that the delineations, the limits, as well as the advances in the conquest of the animal guardianship and consequently of the domestic animal demonstrate how much the recognition of such question is socially constructed. In addition, the expansion, solidification and continuous development of human life and society necessarily imply the preservation and expansion of access to a fundamental right nominally recognized by the Federal Constitution of 1988 as a right to an environmentally balanced environment in which the animal, domesticated, wild and exotic animals. Keywords: Domestic Animals. Guardianship. Federal Constitutions. Brasil.


2016 ◽  
Vol 1 (1) ◽  
pp. 109-126
Author(s):  
Drance Elias da Silva

This Article may be situated within the rapport field between Philosophy and Social Sciences, at the search regarding to the concept concerning the Representation. Regarding to Philosophy, under a general view, the concept, concerning Representation, has been, since a long time, understood as a trail which one would get througl reaching to the real and true ones. Representation, as the thought contents expression form had not been known departing from Philosophy as a barrier against the objectivity concerning the knowledge. Representation, in its source, has been constituting itself a cognictive, inmanent reflection, related to the conscience inner subjectivity. But departing from the episthemological point of view, it has been not so easy for the campus concerning the Culture Sciences as a totality. In the theory regarding to knowledge, the Social Sciences campus and, more specifically, in the human life Symbolic dimension constitutive aspects, it has been, often, accepted negatively as an entry door for the histotical social reality. Nowadays, one may conclude that the contents concerning the Culture are deeply rooted within the histotical reality, which may present new dimension the reading regarding to the Symbolical side concerning the human life, under the view regarding to the unseen aspect, such as the intellectualistic Western dominant Culture allows understanding the way which could be in.


2021 ◽  
Vol 5 (2) ◽  
pp. 153
Author(s):  
Khotibul Umam ◽  
Abdul Muhid

Technological development has changed human life style. Child's world that was once filled with traditional games has now been eroded by technological advances. Nowadays online games that replace traditional games are not only favored by children, almost all levels of human age like playing online games. But behind it all there is a negative impact that haunts its users. This study aims to reveal the negative side of using online games from the point of view of Islam and Islamic Psychology. The technique used is literature review by compiling some previous articles. The results showed that excessive use of online games will give a bad impact on the physical and psychological users, such as visual impairment, sleep disturbance, addiction, violence and stress. The use of online games is also considered more disadvantage than the benefits and it’s seen as an activity that wastes time, and it is prohibited in Islam.


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