Determination of Integrated Safety of High-Risk Structures According to Criteria of Acceptable and Manageable Risks

2020 ◽  
Vol 1006 ◽  
pp. 143-148
Author(s):  
Sergiy Azarov ◽  
Sergiy Yeremenko ◽  
Roman Shevchenko ◽  
Stanislav Shcherbak ◽  
Viktor Mashkov

The paper considers the transition from traditional methods and systems for determining the standard and limit states of potentially dangerous objects by criteria of strength, resource and reliability to new perspective methods for assessing the risks of managing them. The conditions for ensuring the complex safety and security of the equipment and high-risk structures by the criteria of acceptable and managed risks are determined. It is established that the level of risk for assessing the safety status of a potentially dangerous object is defined as a probabilistic measure of the occurrence of man-made or natural phenomena, which are accompanied by the formation and action of harmful factors, as well as inflicted social, environmental, economic and other kinds of losses.

1975 ◽  
Vol 21 (3) ◽  
pp. 428-431 ◽  
Author(s):  
Godfrey Moses ◽  
Edwin Olivero ◽  
Thomas F Draisey

Abstract An isopropanolic extract of serum can be made suitable for the simultaneous estimation of cholesterol and triglycerides by passing it through a commercially-available chromatographic column containing activated metallic oxides in which alumina predominates. No centrifugation step nor phase separation is required. Use of the purified extract allows existing methods to be simplified and shortened without loss of reproducibility or stability. Results compare well with those obtained by traditional methods.


1994 ◽  
Author(s):  
Leo A. Morris ◽  
Douglas E. Smith ◽  
Siraj M. Khan
Keyword(s):  

Author(s):  
Eric Brehm ◽  
Robert Hertle ◽  
Markus Wetzel

In common structural design, random variables, such as material strength or loads, are represented by fixed numbers defined in design codes. This is also referred to as deterministic design. Addressing the random character of these variables directly, the probabilistic design procedure allows the determination of the probability of exceeding a defined limit state. This probability is referred to as failure probability. From there, the structural reliability, representing the survival probability, can be determined. Structural reliability thus is a property of a structure or structural member, depending on the relevant limit states, failure modes and basic variables. This is the basis for the determination of partial safety factors which are, for sake of a simpler design, applied within deterministic design procedures. In addition to the basic variables in terms of material and loads, further basic variables representing the structural model have to be considered. These depend strongly on the experience of the design engineer and the level of detailing of the model. However, in the clear majority of cases [1] failure does not occur due to unexpectedly high or low values of loads or material strength. The most common reasons for failure are human errors in design and execution. This paper will provide practical examples of original designs affected by human error and will assess the impact on structural reliability.


2017 ◽  
Vol 2017 (2) ◽  
Author(s):  
Kwan Tze-wan

AbstractIn the Shuowen, one of the earliest comprehensive character dictionaries of ancient China, when discussing where the Chinese characters derive their structural components, Xu Shen proposed the dual constitutive principle of “adopting proximally from the human body, and distally from things around.” This dual emphasis of “body” and “things around” corresponds largely to the phenomenological issues of body or corporeality on the one hand, and lifeworld on the other. If we borrow Heidegger’s definition of Dasein as Being-in-the world, we can easily arrive at a reformulation of Xu Shen’s constitutive principle of the Chinese script as one that concerns “bodily Dasein.” By looking into various examples of script tokens we can further elaborate on how the Chinese make use not only of the body in general but various body parts, and how they differentiate their life world into material nature, living things, and a multifaceted world of equipment in forming a core basis of Chinese characters/components, upon which further symbolic manipulation such as “indication”, “phonetic borrowing”, semantic combination, and “annotative derivation”, etc. can be based. Finally, examples will be cited to show how in the Chinese scripts the human body (and its parts) might interact with other’s bodies (and their parts) or with “things around” (whether nature, living creatures, or artifacts) in various ways to cover the social, environmental, ritual, technical, economical, and even intellectual aspects of human experience. Bodily Dasein, so to speak, provides us with a new perspective of understanding and appreciating the entire scope of the Chinese script.


Jurnal KIRANA ◽  
2020 ◽  
Vol 1 (1) ◽  
pp. 12
Author(s):  
Lenny Widjayanthi ◽  
Yeni Anggun Widayanti

Grouper fish is a type of reef fish that is exported as a commodity to various countries such as Hong Kong, Japan, Singapore and China. Grouper fish can be cultivated using floating net cages and have a high selling price (high profit) but also have a high risk (high risk), thus affecting the market and the number of grouper aquaculture. The purpose of this research is to determine the socioeconomic impact of the use of floating net on grouper farmers. The determination of the research area was carried out deliberately in Situbondo Regency. The study was conducted with a qualitative approach. Data collection is done by observation and depth interview. The informants of the research were determined intentionally, namely grouper fish farmers who do aquaculture with floating net cages. The data analysis method uses Milles and Huberman. The results showed that the use of floating nets for grouper culture had social and economic impacts. The social impact on grouper farmers is the formation of grouper farmers, thus creating a social network in the form of interaction between farmers; construction of supporting facilities for the development of aquaculture businesses but also raises social prejudices between farmers because of frequent theft of fish in floating nets. While the economic impact is based on increasing grouper production which has a direct impact on the income of grouper farmers. Keywords : Floating net, grouper fish farmers, socio-economic impacts


2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Bernhard Bauer-Marschallinger ◽  
Senmao Cao ◽  
Claudio Navacchi ◽  
Vahid Freeman ◽  
Felix Reuß ◽  
...  

AbstractWe present a new perspective on Earth’s land surface, providing a normalised microwave backscatter map from spaceborne Synthetic Aperture Radar (SAR) observations. The Sentinel-1 Global Backscatter Model (S1GBM) describes Earth for the period 2016–17 by the mean C-band radar cross section in VV- and VH-polarisation at a 10 m sampling. We processed 0.5 million Sentinel-1 scenes totalling 1.1 PB and performed semi-automatic quality curation and backscatter harmonisation related to orbit geometry effects. The overall mosaic quality excels (the few) existing datasets, with minimised imprinting from orbit discontinuities and successful angle normalisation in large parts of the world. Regions covered by only one or two Sentinel-1 orbits remain challenging, owing to insufficient angular variation and not yet perfect sub-swath thermal noise correction. Supporting the design and verification of upcoming radar sensors, the obtained S1GBM data potentially also serve land cover classification and determination of vegetation and soil states. Here, we demonstrate, as an example of its potential use, the mapping of permanent water bodies and evaluate against the Global Surface Water benchmark.


2000 ◽  
Author(s):  
Salvatore Torquato ◽  
Thomas S. Deisboeck

Abstract Intensive medical research over the last fifty years has left the prognosis for patients diagnosed with malignant brain tumors nearly unchanged. This suggests that a new perspective on the problem may offer important insight. We have undertaken an interdisciplinary research program, seeking to study brain tumors as complex systems. This research aims to develop computational models coupled with experimental assays to investigate the hypothesis of self-organizing behavior in tumor systems. Preliminary assays have revealed behavior consistent with this hypothesis. A cellular-automaton model to study the growth of the tumor core has been developed. This model has proven successful in reproducing macroscopic tumor growth from a limited parameter set. Further, it has been applied to investigate the importance of heterogeneity to determination of a clinical prognosis and has demonstrated the importance of understanding clonal composition in making an accurate prognosis.


2019 ◽  
Vol 11 (35) ◽  
pp. 4501-4510 ◽  
Author(s):  
Pu Wu ◽  
Qiuzheng Du ◽  
Yiyang Sun ◽  
Zhonghong Li ◽  
Hua He

This study provides a new perspective for the determination of weak ultraviolet absorption or non-fluorescent substances.


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