Bücher zum Thema „Propagation risk“

This work is a critical update of the most recent and innovative developments of the avalanche science. It aims at re-founding it on clear scientific bases, from field observations and experiments up to strong mathematical and physical analysis and modeling. It points out snow peculiarities, regarding both static mechanical properties and flow dynamics, that may strongly differ from those of compact solids for the former, and of Newtonian fluids for the latter. It analyzes the general processes involved in avalanche release, in terms of brittle fracture and ductile plasticity, specific friction laws, flow of healable granular materials, percolation concepts, cellular automata, scale invariance, criticality, theory of dynamical systems, bifurcations, etc. As a result, slab triggering (including remote triggering) can be summarized by the “slab avalanche release in 4 steps” concept, based on weak layer local collapse and subsequent propagation driven by slab weight. The frequent abortion of many incipient avalanches is easily explained in terms of snow grain dynamical healing. Sluffs and full-depth avalanches are also analyzed. Such advances pave the way for significant progress in risk evaluation procedures. In the present context of a speeding-up climate warming, possible evolutions of snow cover extent and stability are also tentatively discussed. We show how, in mountainous areas, the present analysis can be extended to other gravitational failures (rock-falls, landslides) that are likely to take over from avalanches in such circumstances. The text is supported by on-line links to field experiments and lectures on triggering mechanisms, risk management, and decision making.

Atherosclerosis is the main underlying cause of heart disease. The continuous exposure to cardiovascular risk factors induces endothelial activation/dysfunction which enhances the permeability of the endothelial layer and the expression of cytokines/chemokines and adhesion molecules. This results in the accumulation of lipids (low-density lipoprotein particles) in the extracellular matrix and the triggering of an inflammatory response. Accumulated low-density lipoprotein particles suffer modifications and become pro-atherogenic, enhancing leucocyte recruitment and further transmigration across the endothelium into the intima. Infiltrated monocytes differentiate into macrophages which acquire a specialized phenotypic polarization (protective or harmful), depending on the stage of the atherosclerosis progression. Once differentiated, macrophages upregulate pattern recognition receptors capable of engulfing modified low-density lipoprotein, leading to foam cell formation. Foam cells release growth factors and cytokines that promote vascular smooth muscle cell migration into the intima, which then internalize low-density lipoprotein via low-density lipoprotein receptor-related protein-1 receptors. As the plaque evolves, the number of vascular smooth muscle cells decline, whereas the presence of fragile/haemorrhagic neovessels increases, promoting plaque destabilization. Disruption of this atherosclerotic lesion exposes thrombogenic surfaces that initiate platelet adhesion, activation, and aggregation, as well as thrombin generation. Both lipid-laden vascular smooth muscle cells and macrophages release the procoagulant tissue factor, contributing to thrombus propagation. Platelets also participate in progenitor cell recruitment and drive the inflammatory response mediating the atherosclerosis progression. Recent data attribute to microparticles a potential modulatory effect in the overall atherothrombotic process. This chapter reviews our current understanding of the pathophysiological mechanisms involved in atherogenesis, highlights platelet contribution to thrombosis and atherosclerosis progression, and provides new insights into how atherothrombosis may be modulated.

This chapter characterizes the robustness of multiplex and multilayer networks using classical percolation, directed percolation and antagonistic percolation. Classical percolation determines whether a finite fraction of nodes of the multilayer networks are connected by any type of connection. Classical percolation can be affected by multiplexity since the degree correlations among different layers can modulate the robustness of the entire multilayer network. Directed percolation describes the propagation of a disease requiring cooperative infection from different layers of the multiplex network. It displays a rich phase diagram including both continuous and discontinuous phase transitions. Antagonist percolation on a duplex network describes the competition between two layers and can give rise to hysteresis loops corresponding to phases that either one layer or the other can percolate Avalanches generated by the generalized Sandpile Model and Watts–Strogatz Model are also discussed, emphasizing their relevance for studying the stability of power grids and financial systems.

Possibilities of using existing ground (TV centers, broadcasting stations) and space (global navigation satellite systems) radio systems for solving the problem of remote sensing and monitoring of the environment and objects in it are considered. The methods of diagnostics of the troposphere, description of the refractive index with the use of semi-Markov processes and atomic functions of Kravchenko-Rvacheva are proposed. The seasonal and altitudinal dependencies of radio-meteorological parameters and radio-climatic features of Ukraine were studied. Technologies for determining the effective gradient of the refractive index by damping factor of the VHF signals of television centers on the OTH routes in the zone of the near geometric shadow, on the angles of radioa "rise" and "sets" of the AES, detection of precipitation zones by the fluctuations of the pseudoranges and changes of the coordinates estimates, parameters of the surface of the earth by the fluctuations of the GNSS signals. Reviewers: Head of the Department of Radio waves propagation in the natural environments of the O. Ya. Usikov Institute for Radiophysics and Electronics NASU, Doctor of Physical and Mathematical Sciences, Professor Kivva F.V., Professor of the Department of Designing Radioelectronic Devices of Aircraft of the National Aerospace University. M.E. Zhukovsky (KhAI), Doctor of Technical Sciences, Professor Volosyuk V.K.

National Secession asks which projects for new nation-states give rise to campaigns that cause discord—and sometimes mayhem—in the politics of existing states. This has been explained by identities, grievances, greed, and tactical-logistical opportunities. Yet, under the strategic constraints faced by most national-secession campaigns, the essential element in almost all campaigns is the ability of the campaign’s program to coordinate expectations within a platform population on a common goal so that independence becomes the only viable option. In their strategy of programmatic coordination, which has guided the most important national-secession campaigns, the critical task of campaign leaders is propagating an authentic and realistic nation-state project. This explains which campaigns are most likely to draw attention in the capitals of the great powers that control admission to the international community, bring their disputes with their central governments to an intractable deadlock, and engage in protracted intense struggles to convince the international community that independence is the only viable option.

Almost every country throughout the globe has been affected by the Covid-19 pandemic. The virus's propagation has a disastrous effect on both human health and the economy as a whole. The COVID-19 global recession is the worst since World War II ended. According to the IMF's April 2021 World Economic Outlook Report, the global economy declined by 3.5 percent in 2020, 7 percent drop from the 3.4 percent growth predicted in October 2019. While almost every IMF-covered nation saw negative growth in 2020, the decline was more extreme in the world's poorest regions. The global supply system and international trade of all countries, including India, were affected by the nationwide lockdown in India and around the world to stop the pandemic from spreading. Since the beginning of 2020, the Covid-19 pandemic has had a negative impact on the global business climate. The COVID-19 pandemic has resulted in significant public health and economic problems in South Asian countries and the worst impacted being India, Bangladesh and Pakistan in recent years. The nationwide lockdown adopted by the countries was effective in slowing down the spread of the coronavirus in South Asia, but it came at a substantial financial and social cost to society. Manufacturing activities in Japan, South Korea, Indonesia, Vietnam, and the Philippines have shrunk sharply. Tourism, trade and remittances, and all major sources of foreign money for South Asian countries, have been substantially impacted. The COVID-19 spread has had a significant influence on global financial markets. The international financial and energy markets substantially dropped as the number of cases began to rise globally, primarily in the United States, Italy, Spain, Germany, France, Iran, and South Korea along with South Asian countries. Reduced travel has had a substantial impact on service businesses such as tourism, hospitality, and transportation. According to IMF, (space required after,) 2020 South Asian economies are likely to shrink for the first time in 4 decades. The pandemic has pushed millions into poverty and widened income and wealth disparities because of premature deaths, workplace absenteeism and productivity losses. A negative supply shock has occurred with manufacturing and productive activity decreasing due to global supply chain disruptions and factory closures. This resulted in a severe short-term challenge for policymakers, especially when food and commodity prices rise, exacerbating economic insecurity. Failure to achieve equitable recovery might result in social and political unrest, as well as harsh responses from governments that have been less tolerant of dissident voices in recent years. Almost every area of the Indian economy is being ravaged by the pandemic. But the scope and degree of the damage vary from sector to sector within each area. One of the worst-affected areas in India is the Micro, Small, and Medium Enterprises (MSMEs) sector. Apart from MSMEs, Agriculture and Agro-based industries, Banking companies and NBFCs and Social Sectors are also in jeopardy. The pandemic creates turmoil in the Capital Market and Mutual Funds industry. India's auto manufacturing and its ancillary sectors were badly hit during the initial stages of the pandemic when lockdown measures were adopted and the situation continued to remain subdued for many quarters. It is still uncertain whether this recession will have long-term structural ramifications for the global economy or will have only short-term financial and economic consequences. Additionally, the speed and the strength of the healing may be crucially dependent on the capability of the governments to accumulate and roll out the COVID-19 vaccines. In the context of the pandemic and its devastating impact on the Indian economy, an edited volume is proposed which intends to identify and analyse the footfalls of the pandemic on various sectors and industries in India. The proposed edited volume endeavours to understand the status, impact, problems, policies and prospects of the agricultural and agro-based industries, Banking and NBFCs, MSMEs, Social Sector, Capital Market and Mutual Funds during the pandemic and beyond. The proposed volume will contain research papers/articles covering the overall impact of the pandemic on various sectors, measures to be adopted to combat the situation and suggestions for overcoming the hurdles. For this, research papers and articles will be called from academicians, research scholars and industrialists having common research interests to share their insights relating to this area. It is anticipated that the volume will include twenty to twenty-five chapters. An editorial committee will be constituted with three chief editors and another external editor to review the articles following a double-blind review process to assure the quality of the papers according to the global standards and publisher's guidelines. The expected time to complete the entire review process is one month, and the publication process will start thereafter. The proposed volume is believed to be having significant socio-economic implications and is intended to cater to a large audience which includes academicians, researchers, students, corporates, policymakers, investors and general readers at large.