scholarly journals Examining Beam Oscillations in the Space of Technogenic and Seismic Impact Parameters (Part I)

2021 ◽  
Vol 1079 (3) ◽  
pp. 032057
Author(s):  
Kh P Kulterbayev ◽  
M M Oshkhunov ◽  
L A Baragunova ◽  
A A Kabzhikhov ◽  
S G Bulanov
2021 ◽  
Vol 1079 (3) ◽  
pp. 032058
Author(s):  
Kh P Kulterbayev ◽  
M M Oshkhunov ◽  
L A Baragunova ◽  
A A Kabzhikhov ◽  
S G Bulanov

2021 ◽  
Vol 124 ◽  
pp. 105309
Author(s):  
Vytautas Makarskas ◽  
Mindaugas Jurevičius ◽  
Janis Zakis ◽  
Artūras Kilikevičius ◽  
Sergejus Borodinas ◽  
...  

Challenges ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 9
Author(s):  
Alan C. Logan ◽  
Susan H. Berman ◽  
Richard B. Scott ◽  
Brian M. Berman ◽  
Susan L. Prescott

Planetary health is a broad multidisciplinary effort that attempts to address what has been described as “Anthropocene Syndrome”—the wicked, interrelated challenges of our time. These include, but are not limited to, grotesque biodiversity losses, climate change, environmental degradation, resource depletion, the global burden of non-communicable diseases (NCDs), health inequalities, social injustices, erosion of wisdom and civility, together with the many structural underpinnings of these grand challenges. The ultimate aim of planetary health is flourishing along every link in the person, place and planet continuum. The events of “2020” have illuminated the consequences of “mass trauma” and how sub-threshold anxiety and/or depressive symptoms erase the rigid lines between mental “health” and mental “disorders”, and unmasked the systemic forms of injustice, discrimination, and oppression that have too often escaped discourse. Here, we query the ways in which post-traumatic growth research might inform the larger planetary health community, especially in the context of a global pandemic, broadening socioeconomic inequalities, a worsening climate crisis, and the rise of political authoritarianism. The available research would suggest that “2020” fulfills the trauma criteria of having a “seismic impact on the assumptive world”, and as such, provides fertile ground for post-traumatic growth. Among the many potential positive changes that might occur in response to trauma, we focus on the value of new awareness, perspective and greater wisdom.


Mathematics ◽  
2021 ◽  
Vol 9 (16) ◽  
pp. 1849
Author(s):  
Stelian Alaci ◽  
Constantin Filote ◽  
Florina-Carmen Ciornei ◽  
Oana Vasilica Grosu ◽  
Maria Simona Raboaca

The paper presents an analytical solution for the centric viscoelastic impact of two smooth balls. The contact period has two phases, compression and restitution, delimited by the moment corresponding to maximum deformation. The motion of the system is described by a nonlinear Hunt–Crossley equation that, when compared to the linear model, presents the advantage of a hysteresis loop closing in origin. There is only a single available equation obtained from the theorem of momentum. In order to solve the problem, in the literature, there are accepted different supplementary hypotheses based on energy considerations. In the present paper, the differential equation is written under a convenient form; it is shown that it can be integrated and a first integral is found—this being the main asset of the work. Then, all impact parameters can be calculated. The effect of coefficient of restitution upon all collision characteristics is emphasized, presenting importance for the compliant materials, in the domain of small coefficients of restitution. The results (variations of approach, velocity, force vs. time and hysteresis loop) are compared to two models due to Lankarani and Flores. For quasi-elastic collisions, the results are practically the same for the three models. For smaller values of the coefficient of restitution, the results of the present paper are in good agreement only to the Flores model. The simplified algorithm for the calculus of viscoelastic impact parameters is also presented. This algorithm avoids the large calculus volume required by solving the transcendental equations and definite integrals present in the mathematical model. The method proposed, based on the viscoelastic model given by Hunt and Crossley, can be extended to the elasto–visco–plastic nonlinear impact model.


2010 ◽  
Vol 20 (3) ◽  
pp. 1620-1654 ◽  
Author(s):  
Somayeh Moazeni ◽  
Thomas F. Coleman ◽  
Yuying Li

1995 ◽  
Vol 06 (05) ◽  
pp. 681-692
Author(s):  
R. ODORICO

A Neural Network trigger for [Formula: see text] events based on the SVT microvertex processor of experiment CDF at Fermilab is presented. It exploits correlations among track impact parameters and azimuths calculated by the SVT from the SVX microvertex detector data. The neural trigger is meant for implementation on the systolic Siemens microprocessor MA16, which has already been used in a neural-network trigger for experiment WA92 at CERN. A suitable set of input variables is found, which allows a viable solution for the preprocessing task using standard electronic components. The response time of the neural-network stage of the trigger, including preprocessing, can be estimated ~10 μs. Its precise value depends on the quantitative specifications of the output signals of the SVT, which is still in development. The performance of the neural-network trigger is found to be significantly better than that of a conventional trigger exclusively based on impact parameter data.


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