scholarly journals Tea With Milk? A Hierarchical Generative Framework of Sequential Event Comprehension

Author(s):  
Gina R. Kuperberg
Keyword(s):  
Author(s):  
Woo-Seok Choi ◽  
Sanghoon Lee ◽  
Kyoung-Sik Bang ◽  
Ju-Chan Lee ◽  
Ki-Seog Seo

During safety assessments of transport packages, cumulative damages are naturally accumulated for assessments performed using physical tests specimens. However, the cumulative damages are not as easily accounted when assessments are by numerical simulations. While analysts are comfortable with simulating packages for single events, it is not yet common practice to incorporate the effect handed over from a former event to the next, in a series of sequential load events. Thus, many numerical simulations in SAR (Safety Analysis Report) represent just a single event in the series of sequential event comprising the required accident condition. These single event numerical simulations are then based on initial conditions different from the analogous physical test specimen, which could contribute to a growing disparity in results between assessments by physically testing compared to numerical simulation. The reason why analyses do not consider the cumulative damage is difficulties in delivering the final result of the previous analysis to the current analysis. The hypothetical accident conditions described in the IAEA regulations include drop, puncture, fire, and water immersion conditions, which should be sequentially simulated. There can be cumulative damage between two accident conditions, such as drop and puncture, puncture and fire, and so forth. In this study, as the first step to consider cumulative damage, an analysis technology to perform a puncture analysis incorporating the final response field from a prior drop analysis is proposed. The necessity and validity of the proposed analysis technology are evaluated by a comparison with the results obtained by performing each analysis independently.


2019 ◽  
Vol 10 (4) ◽  
pp. 1250
Author(s):  
E. V. LAPTEVA ◽  
V. V. OSTROUMOV ◽  
S. Yu. BOLDYREVA ◽  
N. I. PROTOPOPOVA

Until the mid-eighteenth century the world economy was slowly evolving, but after the 1750-s a radical change occurred, which had a huge impact not only on the economy, but also on culture, society and life in general.  The industrial revolution became the main lever of change. As a result, its main economic component - agriculture - has ceased to be dominant. Traditionally, the industrial revolution was seen as a sequential event, a chain of events from the lowest to the highest. The author made an attempt to consider the main parameters of the industrial revolution as a chain of paradoxes characteristic of developed European countries. To do this, turning to classical works of a theoretical and scientific-practical nature, the authors tried to consider the problem of European countries entering the industrial stage as a complex, contradictory and difficult process that revealed both leaders and Laggards.


2018 ◽  
Vol 160 ◽  
pp. 05002 ◽  
Author(s):  
Yao Zhou ◽  
Fei Yan

Accident investigation and analysis after the accident, vital to prevent the occurrence of similar accident and improve the safety of the system. Different methods led to a different understanding of the accident. In this paper, a subway accident was analysed with a systemic accident analysis model – STAMP (System-Theoretic Accident Modelling and Processes). The hierarchical safety control structure was obtained, and the system-level safety constraints were obtained, controllers of the physical layer were analysed one by one, and put forward the relevant safety requirements and constraints, the dynamic analysis of the structure of the safety control is carried out, and the targeted recommendations are pointed out. In comparison with the analysis results obtained by the Rail Accident Investigation Branch (RAIB). Some useful findings have been concluded. STAMP treats safety as a control problem and reduces or eliminates causes of the accident from the controlling perspective. Whereas RAIB obtains causes of the accident by analysing the sequence of events related to the accident and reasons of these events, then chooses one(or more)event(s) as the immediate cause and some of the key events as causal factors. RAIB analysis is based on the sequential event models, but STAMP analysis provides us with a holistic, dynamic way to control system to maintain safety.


1980 ◽  
Vol 85 (2) ◽  
pp. 261-265 ◽  
Author(s):  
YEE CHU TOH

Sprague–Dawley rats were castrated either within 24 h of birth or at 4 weeks of age. Control animals were sham operated. Intact female rats were also included for comparison. Sebum production was assessed at 80 days of age by measuring the amount of skin-surface lipids that could be extracted with acetone and which had been produced during 2 days. The removal of the testes at birth reduced the activity of the sebaceous glands to a level more nearly approaching that seen in the female rats whereas castration at 4 weeks of age only partially decreased the rate of sebum secretion so that it was intermediate between the male and female rats. The weights of the pituitary gland, thyroid and adrenal glands increased after castration but there were no differences between rats castrated at birth and those castrated at 4 weeks of age except in the weight of the thyroid gland. It would appear that the role of the testes in the control of the activity of the sebaceous glands is a sequential event which has already started at birth.


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