scholarly journals Safe and energy-efficient ventilation in mines – application of the golden ratio method in designing forced air distribution for ventilation networks

2018 ◽  
Vol 198 ◽  
pp. 012010
Author(s):  
Grzegorz Pach
Keyword(s):  
Energy Efficient ◽  
Golden Ratio ◽  
Ratio Method ◽  
Air Distribution ◽  
Forced Air ◽  
Ventilation Networks

scholarly journals Energy Efficient Sensor Node Deployment Scheme for Two Stage Routing Protocol of Wireless Sensor Networks assisted IoT

2020 ◽  
Vol 18 (2) ◽  
pp. 158-169
Author(s):  
Anshu Kumar Dwivedi ◽  
Awadhesh Kumar Sharma ◽  
Pawan Singh Mehra
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Routing Protocol ◽  
Energy Efficient ◽  
Sensor Node ◽  
Golden Ratio ◽  
Real Life ◽  
Wireless Sensor ◽  
Two Stage ◽  
Node Deployment

Now a day wireless sensor networks (WSNs) is an essential unit of the internet of things (IoT). IoT theater a vital role in real-time applications which is more useful in real life. Due to its small price and potential use, WSNs have shown importance in different applications over the past year. Health concerns, environmental observation, human protection, military operations, surveillance systems, etc. WSNs have a small device called a sensor node (SN) that has a limited battery. IoT based WSNs consume more energy in sensor node communication. Therefore a Novel energy-efficient sensor node deployment scheme for two-stage routing protocol (EE- DSTRP) has been proposed to reduce the energy consumption of sensor nodes and extend the lifetime of the network. Sensor node deployment is a novel approach based on the golden ratio. All traditional protocols divide network zones for communication. No existing protocols tell about the sensor node deployment ratio in each zone. The deployment method is an important factor in reducing the energy usage of a network. To validate its efficiency, in this article, simulation results prove that the proposed IoT based EE-DSTRP protocol is superior to other existing protocols.

scholarly journals METHODOLOGICAL APPROACH TO ASSESSING THE COMPETITIVENESS OF INSTITUTIONS OF HIGHER EDUCATION

Management ◽  
2021 ◽  
Vol 32 (2) ◽  
pp. 9-24
Author(s):  
Svitlana Breus ◽  
Yevheniia Khaustova ◽  
Mykola Denysenko ◽  
Svitlana Bondarenko ◽  
Nataliia Kyrylko
Keyword(s):  
Higher Education ◽  
Economic Development ◽  
Factor Analysis ◽  
Methodological Approach ◽  
Golden Ratio ◽  
Ratio Method ◽  
Institutions Of Higher Education ◽  
Strategic Development ◽  
Knowledge Based ◽  
Socio Economic Development

Background and objectives. The problem of competitiveness of institutions of higher education (IHE) is one of the key tasks, the solution of which will help increase the socio-economic development of the country. In the context of Ukraine's European integration interests, competition between Ukrainian and foreign IHEs is intensifying, which encourages the former to find ways of their own competitiveness (which is largely determined by the competitiveness of its graduates and the ability to generate knowledge-based innovations) as a result of using appropriate factors that are directly dependent on increasing competitiveness in the context of its management.Methods. Methods of profiles and ratings using separate methods of comparative, statistical and economic-mathematical analysis (factor analysis), with the formation of an appropriate system of indicators.Findings. The results of assessing the competitiveness of KNUTD indicate a decrease in the level of competitiveness of IHEs. It has been estimated that during 2017–2019 it was at a low level (0.542, 0.541 and 0.466, respectively), which according to the proposed scale for determining the level of competitiveness of IHEs (developed using the golden ratio method) is in the range of 0.383–0.618. Conclusion. Based on studying and assessing the competitiveness of IHEs to improve it in the context of its management and ensure the strategic development of IHEs within the implementation of relevant strategic alternatives and proposed generalized areas, as well as certain factors of competitiveness, it has been determined appropriate to forecast the indicators underlying the calculation of the KNUTD competitiveness, using an improved methodological approach to the main proposed measures.

scholarly journals AN ENERGY-EFFICIENT AIR CONDITIONING SYSTEM FOR COMPUTER ROOM WITH FORCED AIR COOLING EQUIPMENT

1997 ◽  
Vol 62 (494) ◽  
pp. 29-36 ◽  
Author(s):  
Hirofumi HAYAMA ◽  
Hideaki NAKAZATO ◽  
Manabu KISHITA ◽  
Takashi KURABUCHI
Keyword(s):  
Energy Efficient ◽  
Air Conditioning ◽  
Air Cooling ◽  
Air Conditioning System ◽  
Forced Air

The right approach how to design the conditioning system of a sugar silo

2017 ◽  
pp. 476-480
Author(s):  
Jörg Linek ◽  
Norbert Rösch
Keyword(s):  
Water Content ◽  
Energy Efficient ◽  
Weather Conditions ◽  
Air Distribution ◽  
Residual Water ◽  
Work Safety ◽  
Efficient Operation ◽  
Residual Water Content ◽  
Heated Air ◽  
The Right

In the light of the constantly growing requirements regarding efficiency, work safety and increasing capacities the design of silos and its conditioning systems demands for customer-specific and experience-based approach. After production fresh sugar has a residual water content which can lead to agglomerations during storage. This affects the product quality, discharge and transport from the silo and endangers staff who has to remove cakings manually. Therefore it is necessary to prepare and distribute the air constantly at optimal conditions. Time of conditioning, air quantity and humidity are the parameters to be determined simultaneously based on the type of silo, residual water content of stored sugar, size of sugar crystals, product feed-in rate and environmental conditions [1]. In the design the amount of water to be removed, air distribution in the sugar bed and temperature are considered. Depending on weather conditions the supplied air is mixed with fresh, dried, cooled or heated air to meet the needed conditions and to enable an energy-efficient operation of the plant.

scholarly journals An Efficient Golden Ratio Method for Secure Cryptographic Applications

2018 ◽  
Vol 23 (4) ◽  
pp. 58 ◽  
Author(s):  
Anthony Overmars ◽  
Sitalakshmi Venkatraman
Keyword(s):  
Data Storage ◽  
Golden Ratio ◽  
Fibonacci Sequence ◽  
Ratio Method ◽  
Secure Communications ◽  
Security Attacks ◽  
Security Breaches ◽  
Elliptic Curve Cryptosystems ◽  
Electronic Transactions ◽  
Sequence Method

With the increase in the use of electronic transactions in everyday life, secure communications and data storage to withstand any kind of attack is warranted. The golden ratio, being the most irrational among irrational numbers, can be used in elliptic curve cryptosystems, power analysis security, and other applications. However, in such applications, cryptographic operations should take place very quickly before the keys are extracted or decoded by the attackers. This paper proposes an efficient method of golden ratio computation in cryptography to resist information security breaches. We compare our new golden ratio method with the well-known Fibonacci sequence method. The experimental results show that our proposed method is more efficient than the Fibonacci sequence method. Our golden ratio method with infinite precision provides reliable counter measure strategy to address the escalating security attacks.

Numerical Simulation of Air Flow Arrangement and Energy Conservation of Air-Condition

2012 ◽  
Vol 588-589 ◽  
pp. 1341-1345 ◽  
Author(s):  
Jun Qiang Yang ◽  
Hong Bo Wei ◽  
Ming Jun Li
Keyword(s):  
Numerical Simulation ◽  
Energy Conservation ◽  
Simulation Model ◽  
Energy Saving ◽  
Energy Efficient ◽  
Research Team ◽  
Simulation Software ◽  
Air Distribution ◽  
Small Space ◽  
Energy Effect

In this paper, we study the building air-conditioned room in the small space and establishment the mathematical numerical simulation model which is for the designing and energy saving of the air distribution, We analysis the energy effect on five types of the airflow organization based on simulation software developed by our research team to study the designing and energy saving of the air distribution, and the results show that considering both the two ways of the air distribution is more reasonable and energy-efficient.

scholarly journals Influence of Applying Additional Forcing Fans for the Air Distribution in Ventilation Network

2016 ◽  
Vol 23 (3) ◽  
pp. 163-171
Author(s):  
Nikodem Szlązak ◽  
Dariusz Obracaj ◽  
Marek Korzec
Keyword(s):  
Ventilation System ◽  
Underground Mines ◽  
Air Distribution ◽  
Ventilation Network ◽  
Airflow Rate ◽  
Total Resistance ◽  
Subsurface Structure ◽  
Pull Systems ◽  
Underground Workings ◽  
Ventilation Networks

Abstract Mining progress in underground mines cause the ongoing movement of working areas. Consequently, it becomes necessary to adapt the ventilation network of a mine to direct airflow into newly-opened districts. For economic reasons, opening new fields is often achieved via underground workings. Length of primary intake and return routes increases and also increases the total resistance of a complex ventilation network. The development of a subsurface structure can make it necessary to change the air distribution in a ventilation network. Increasing airflow into newly-opened districts is necessary. In mines where extraction does not entail gas-related hazards, there is possibility of implementing a push-pull ventilation system in order to supplement airflows to newly developed mining fields. This is achieved by installing subsurface fan stations with forcing fans at the bottom of downcast shaft. In push-pull systems with multiple main fans, it is vital to select forcing fans with characteristic curves matching those of the existing exhaust fans to prevent undesirable mutual interaction. In complex ventilation networks it is necessary to calculate distribution of airflow (especially in networks with a large number of installed fans). In the article the influence of applying additional forcing fans for the air distribution in ventilation network for underground mine were considered. There are also analysed the extent of overpressure caused by the additional forcing fan in branches of the ventilation network (the operating range of additional forcing fan). Possibilities of increasing airflow rate in working areas were conducted.

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