The Process of System Collapse Based on Areas of Vulnerability

2006 ◽  
Author(s):  
Donald McGillis ◽  
Khalil EL-Arroudi ◽  
Reginald Brearley ◽  
Geza Joos
Keyword(s):  
System Collapse

What causes the immune system collapse seen in AIDS?

Science ◽  
1993 ◽  
Vol 260 (5112) ◽  
pp. 1256-1256 ◽  
Author(s):  
J Cohen
Keyword(s):  
Immune System ◽  
System Collapse

Bacteria and Protozoa Population Dynamics in Biological Phosphate Removal Systems

1994 ◽  
Vol 29 (7) ◽  
pp. 109-117 ◽  
Author(s):  
J. S. Čech ◽  
P. Hartman ◽  
M. Macek
Keyword(s):  
Population Dynamics ◽  
Phosphorus Removal ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Sole Source ◽  
Phosphate Removal ◽  
Enhanced Biological Phosphorus Removal ◽  
Biological Phosphorus Removal ◽  
System Collapse ◽  
Biological Phosphorus

Population dynamics of polyphosphate-accumulating bacteria (PP bacteria) was studied in a laboratory sequencing batch reactor simulating anaerobic-oxic sludge system. The competition between PP bacteria and another microorganism (“G bacteria”) for anaerobic-oxic utilization of acetate as the sole source of organic carbon was observed. The competition was found to be seriously influenced by protozoan and metazoan grazing: Predation-resistant “G bacteria” forming large compact flocs outcompeted PP bacteria. Several breakdowns of enhanced biological phosphorus removal were observed. The first one was related to the development of an euglenid flagellate Entosiphon sulcatus and attached ciliates Vorticella microstoma and V. campanula. The second system collapse was connected with a rapid proliferation of rotifers. An alternative-prey predation was thought to be a mechanism of PP bacteria elimination.

scholarly journals Mitigate risk of healthcare delivery system collapse: Some measures of Taiwan

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Wen-Hui Su ◽  
Wei-Ling Huang ◽  
Pei-Shan Shie ◽  
Lin-Kun Wu ◽  
Shih-Huai Hsiao
Keyword(s):  
Delivery System ◽  
Healthcare Delivery ◽  
Healthcare Delivery System ◽  
System Collapse

scholarly journals The Impact of HVDC Links on Transmission System Collapse

2018 ◽  
Vol 6 (1) ◽  
Author(s):  
Hualei Wang ◽  
Hanjing Zhang ◽  
Chengqing Song ◽  
Chao Xu
Keyword(s):  
Transmission System ◽  
System Collapse ◽  
The Impact

scholarly journals Power system voltage collapse prediction using a new line stability index (NLSI-1): A case study of the 330-kV nigerian national grid

2019 ◽  
Vol 9 (6) ◽  
pp. 5125
Author(s):  
I. A. Samuel ◽  
J. Katende ◽  
C. O. A. Awosope ◽  
A. A. Awelewa ◽  
A. I. Adekitan ◽  
...  
Keyword(s):  
Power System ◽  
Stability Index ◽  
Base Case ◽  
Voltage Collapse ◽  
Cumulative Number ◽  
The Novel ◽  
A Value ◽  
System Collapse ◽  
The Difference ◽  
Reliability Issue

The cumulative number of historical and recent power system outages substantiates the fact that further studies are necessary for an improved solution to the issue of voltage instability on the grid and the subsequent system collapse. Voltage collapse is a serious reliability issue which inhibits the objective of running a reliable and secure power system network. In this study, a new line stability index (NLSI_1) for predicting voltage collapse is presented.  The new index considers a switching logic which is derived from the difference of voltage angle between the two load buses. The index is deployed for performance analysis using the 28-bus, 330-kV Nigeria National Grid (NNG).  The simulation implemented in MATLAB shows that the index gives the same results as Line stability index (Lmn) and Fast Voltage Stability Index (FVSI) indices. The base case and the contingency scenarios were considered during the simulation. The base case analysis using the NNG values of all the three indices FVSI, Lmn, and NLSI_1 for simulation generates a value less than one for the entire lines which implies that the NNG is stable in this mode. The values of the three indices are almost the same, which confirms the accuracy of the novel index developed. The analysis for the contingency case reveals that the load bus 16 (Gombe) which has the lowest, maximum permissible reactive load of 139.5MVAR is the weakest; also power line 16-19 is identified as the critical line. The result of the simulation confirms that the accuracy was improved by using NLSI_1.

Extinguishing Ability: How We Became Postextinction Persons

2018 ◽  
Author(s):  
Claire Colebrook
Keyword(s):  
Global Warming ◽  
Resource Depletion ◽  
Prima Facie ◽  
System Collapse ◽  
The Future ◽  
Forms Of Life ◽  
The Relationship

What is the relationship between extinction and disability? As “we” face a future of resource-depletion, eco-system collapse, and runaway global warming, it might seem more urgent than ever to develop new forms of rationality and technology to allow us to survive. The conception of survival, or living-on, is at the heart of Derrida’s deconstruction, as is an inherently promissory account of time and experience. In the spirit of deconstruction, this chapter looks at the ways in which ability, capacity, and radically future promising are intertwined with an inflated and unsustainable mode of existence. Just as extinction threats pose necessary questions to the present regarding what life or lives will survive into the future, so the legacy of philosophy’s past and conditions pose questions as to the forms of life that have been granted a prima facie right to survival.

Japan: Keeping the Death Toll to the Minimum

2021 ◽  
pp. 147-160
Author(s):  
Tomoya Ono ◽  
Shigenori Matsui
Keyword(s):  
Medical System ◽  
Health Crisis ◽  
Government Response ◽  
Public Health Crisis ◽  
Death Toll ◽  
System Collapse ◽  
Prevention System ◽  
Legal Sanctions ◽  
Unique Approach ◽  
Deadly Disease

This chapter assesses the Japanese government’s responses to the Covid-19 pandemic. Despite the strong criticisms and deep-rooted concerns with the insufficiency of government response to Covid-19, together with a limited availability of PCR testing, the government’s concentration on the treatment of more serious patients, its focus on prevention of cluster transmission, and its soft lockdown without any legal sanctions might be sufficient to achieve the primary goal of keeping the death toll to the minimum. However, it is not clear whether it could be ultimately successful as the pandemic continues to unfold, nor is it clear whether Japan could respond effectively to the outbreak of a much more deadly disease in the future. The Japanese unique approach against Covid-19 might work out to prevent pandemic outbreaks and medical system collapse, but some problems and challenges remain. Japan surely needs to re-evaluate its response to Covid-19 and reconsider, in a holistic and systematic way, the entire infectious disease prevention system and the possibility of emergency powers during a public health crisis.

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