The wave algorithm used to determine the optimal indoor route for smoke divers in case of fire and fumigation

2021 ◽  
Vol 30 (3) ◽  
pp. 31-40
Author(s):  
E. V. Stepanov ◽  
D V. Tarakanov ◽  
N. G. Topolskiy
Keyword(s):  
Work Performance ◽  
Software Tool ◽  
Point Of Entry ◽  
Fire Extinguishing ◽  
Moore Neighborhood ◽  
Reasonable Choice ◽  
Remote Monitoring Systems ◽  
Fire Spreading ◽  
Theoretical Foundations ◽  
Fire Origin

Introduction. One of the main objectives, pursued by the information analysis support extended to smoke divers, is the preparation of indoor routes. Technical capabilities, represented by advanced remote monitoring systems, provide a fire extinguishing manager with the necessary information about the point of fire origin and mathematical tools allow to predict fire spreading characteristics. The goal of this work is to develop an algorithm for the preparation of an optimal indoor route for smoke divers to support management decisions in the event of fire. To achieve this goal, it is necessary to develop the theoretical framework and implement it in a software programme.Theoretical foundations. The theory of cellular automata is employed in this paper to simulate the routes of smoke divers inside a building. A cellular automaton with a Moore neighborhood is applied. We use differential equations, similar to the Kolmogorov equations, to monitor the fire parameters.Results and discussions. A modified wave algorithm was developed to determine the optimal indoor route. The software tool was applied to simulate the route of gas divers. Coefficients of importance were applied in the process of mathematical modeling; they took account of the prioritized work to be performed by smoke divers.Conclusions. The results of the study suggest that the algorithm allows to identify the optimal itinerary, thereby enabling the decision maker, responsible for sending teams of smoke divers to the work performance location, to make a reasonable choice of the point of entry for the personnel and machinery, as well as their itinerary inside the building.

scholarly journals A Study on the Durability of Fire Hoses of Fire Hydrants

2021 ◽  
Vol 21 (6) ◽  
pp. 97-102
Author(s):  
Hakjoong Kim ◽  
Youngjoo Song
Keyword(s):  
Service Life ◽  
Case Analysis ◽  
Fire Fighting ◽  
Sample Analysis ◽  
Property Damage ◽  
Human Safety ◽  
Fire Extinguishing ◽  
Years Of Service ◽  
Fire Spreading ◽  
Fire Extinguishers

Although the number of fires has not changed considerably in recent times, property damage and casualties due to fires are increasing every year. Maintaining the performance of fire-fighting facilities installed in buildings has been emphasized for maximizing human safety and minimizing property damage caused by fires. As a result, since 2017, the maintenance of fire extinguishers throughout their service life, has been mandated. In case of a fire, initial fire extinguishing and fire spreading prevention are crucial. There have been no available measures for the maintenance and verification of indoor fire hydrants and outdoor fire hydrant hoses used for extinguishing fires and preventing combustion expansion. This study was therefore intended to present measures for ascertaining the service life of these fire extinguishers, by evaluating their firefighting abilities through sample analysis and case analysis of the fire hoses. Research shows that the degradation of performance of the fire hoses becomes evident between 9 and 10 years, so that 10 years of service life is considered appropriate for the fire hoses.

scholarly journals Design and Development of Forest Fire Detecting Drone

2019 ◽  
Vol 8 (4S2) ◽  
pp. 331-333
Keyword(s):  
Forest Fires ◽  
Thermal Imaging ◽  
Research Work ◽  
Smart Phone ◽  
Wide Angle ◽  
The Novel ◽  
Viewing Angle ◽  
Fire Extinguishing ◽  
Imaging Camera ◽  
Fire Spreading

The proposed research work describes a novel fire detecting drone for forest fires. The fire detecting drone helps the fire rescue officers to detect the fire and navigate it. The normal drone is in general high cost and complicated to operate. The proposed drone designed and developed in this work is economical and simple in operation. The weight of the novel drone is also comparatively less than the normal drone. Thermal imaging camera detects the fire and transmits the data to the rescue officer. GPS module sent the exact location of the fired place to the officer. The viewing angle of normal drone camera is about 50°. But the proposed drone provides up to 170° wide angle. When the drone fly’s over the fired area, the camera streams the live situation of the fired to the smart phone through Wi-Fi. Then the location of the affected area is transmitted to the smart phone through GPS module. Then the drone drop CO2 bomb on the fire, which reduce the fire spreading. Then the rescue squad takes charge for the final fire extinguishing.

scholarly journals HOUSEHOLD DIGITAL MEDIA ECOLOGIES - METHODOLOGICAL INNOVATIONS FOR FOSTERING RESEARCHER-PARTICIPANT TRUST

2019 ◽  
Vol 2019 ◽  
Author(s):  
Jenny Kennedy ◽  
Rowan Wilken ◽  
Bjorn Nansen ◽  
Michael Arnold ◽  
Martin Gibbs
Keyword(s):  
Data Collection ◽  
Digital Media ◽  
Recent Work ◽  
Mobile Devices ◽  
Research Methodology ◽  
Software Tool ◽  
Participatory Approach ◽  
Research Projects ◽  
Digital Ethnography ◽  
Point Of Entry

In this paper, we describe a research methodology we have developed, based upon digital ethnography approaches, and which used mobile devices, digital ethnographic software and creative data collection activities. Our approach, refined over the course of a number of interconnected research projects, addressed these difficulties through a staged process – utilising traditional ethnographic techniques, but augmenting them with something more novel: the “domestic probe”. In essence, the domestic probe comprised a box of equipment given to the household to use in order to record and interpret their use of domestic technologies. In more recent work, we extended our participatory approach through the use of digital media, such as by using iPad minis pre-loaded with a data collection software tool, Ethnocorder. As we argue in this paper, these approaches carry three specific trust-related methodological benefits (and challenges): the foster trust in us as researchers; trust in our participants as co-researchers; and, as a result of this mutual researcher-participant trust, insight and a productive point of entry into discussing participant "domestication" of, and trust in, various household technologies.

Недостатки типового проектирования автоматических установок пожаротушения. Часть 2. Проектный пожар и безопасность применения

2020 ◽  
Author(s):  
Nikolay Smirnov ◽  
Victoria Grishakina ◽  
Galiya Sitdekova
Keyword(s):  
Highly Qualified ◽  
Design Fire ◽  
Development Scenarios ◽  
Fire Extinguishing ◽  
Reasonable Choice ◽  
Typical Design ◽  
Maximum Design ◽  
Freon 114B2

Критерий «максимальный проектный пожар» может использоваться для обоснования эффективности автоматической установки пожаротушения (АУП). Он выбирается из анализа сценариев и динамики развития пожара, представляет собой пожар, наиболее сложный для пожаротушения с помощью АУП. Безопасность огнетушащих газов зависит от их свойств. СО и хладон 114В2 являются наиболее опасными огнетушащими газами. Типовое проектирование АУП не учитывает специфические особенности объектов защиты. Обоснованный выбор АУП должен осуществлять только высококвалифицированный специалист, прошедший соответствующее обучение.The criterion «maximum design fire» is used to justify the effectiveness of automatic fire extinguishing installation (AUP). It is based on the analysis of fire development scenarios and found the most difficult fire for fire-extinguishing with AUP. The safety of extinguishing gases depends on their properties. CO and freon 114B2 are the most dangerous fire extinguishing gases. Typical design of AUP does not take into account the specific features of objects of protection. Reasonable choice of AUP should be made only by a highly qualified specialist after the appropriate training.

scholarly journals Reliability-operational analysis of fixed gas fire extinguishing equipment integrated with fire signalling systems

2019 ◽  
Vol 68 (2) ◽  
pp. 189-200
Author(s):  
Tomasz Klimczak ◽  
Jacek Paś
Keyword(s):  
Data Processing ◽  
Fire Protection ◽  
Redundant System ◽  
Control Room ◽  
Signalling System ◽  
Operational Analysis ◽  
Fire Extinguishing ◽  
Fire Spreading ◽  
Signalling Systems ◽  
Central Station

Fire protection of server rooms and data processing centres, located in public buildings, uses fire extinguishing equipment known as fixed gas fire extinguishing devices (SUG-G). The extinguishing medium (gas in tanks) should be stored at a location indicated in the fire scenario and in the technical contractor project for SUG-G. SUG-G is intended to extinguish a fire in its initial stages and to prevent fire spreading. The fire signalling central station (CSP) receives a fire signal from a group of sensors located in the protected premise and notifies the Fire Brigade (PS), whilst the fire extinguishing control room automatically starts the gas extinguishing process. Such use of a signalling and extinguishing system results in a redundant system. This improves reliability of the fire signalling system (SSP), which is responsible for safety inside the building. Keywords: sensor, operation, fire signalling systems.

No Radiotherapy a Reasonable Choice Over Age 70

Ob Gyn News ◽  
2007 ◽  
Vol 42 (2) ◽  
pp. 7
Author(s):  
BRUCE JANCIN
Keyword(s):  
Reasonable Choice

Social Desirability in Personality Inventories

2014 ◽  
Vol 35 (3) ◽  
pp. 144-157 ◽  
Author(s):  
Martin Bäckström ◽  
Fredrik Björklund
Keyword(s):  
Social Desirability ◽  
Big Five ◽  
Work Performance ◽  
Factor Model ◽  
Five Factor Model ◽  
Peer Ratings ◽  
Personality Inventories ◽  
Model Study ◽  
The Difference ◽  
New Variables

The difference between evaluatively loaded and evaluatively neutralized five-factor inventory items was used to create new variables, one for each factor in the five-factor model. Study 1 showed that these variables can be represented in terms of a general evaluative factor which is related to social desirability measures and indicated that the factor may equally well be represented as separate from the Big Five as superordinate to them. Study 2 revealed an evaluative factor in self-ratings and peer ratings of the Big Five, but the evaluative factor in self-reports did not correlate with such a factor in ratings by peers. In Study 3 the evaluative factor contributed above the Big Five in predicting work performance, indicating a substance component. The results are discussed in relation to measurement issues and self-serving biases.

The Relation Between Financial Incentives, Motivation, and Performance

2017 ◽  
Vol 16 (2) ◽  
pp. 61-76 ◽  
Author(s):  
Anaïs Thibault Landry ◽  
Marylène Gagné ◽  
Jacques Forest ◽  
Sylvie Guerrero ◽  
Michel Séguin ◽  
...  
Keyword(s):  
Financial Incentives ◽  
Work Performance ◽  
Autonomous Motivation ◽  
Compensation Plans ◽  
Work Settings ◽  
Path Analyses ◽  
Three Samples ◽  
And Performance ◽  
Performance Results

Abstract. To this day, researchers are debating the adequacy of using financial incentives to bolster performance in work settings. Our goal was to contribute to current understanding by considering the moderating role of distributive justice in the relation between financial incentives, motivation, and performance. Based on self-determination theory, we hypothesized that when bonuses are fairly distributed, using financial incentives makes employees feel more competent and autonomous, which in turn fosters greater autonomous motivation and lower controlled motivation, and better work performance. Results from path analyses in three samples supported our hypotheses, suggesting that the effect of financial incentives is contextual, and that compensation plans using financial incentives and bonuses can be effective when properly managed.

Sign in / Sign up

Export Citation Format

Share Document