scholarly journals Testing and isolation strategies for the vibrational hazards

2019 ◽  
Vol 39 (2) ◽  
pp. 124-131
Author(s):  
Huang Wei ◽  
Xu Jian ◽  
Zhang Tong-yi ◽  
Hu Ming-yi ◽  
Qin Jing-wei ◽  
...  
Keyword(s):  
Active Control ◽  
Control Strategies ◽  
Green Building ◽  
Power Equipment ◽  
Civil Structures ◽  
Severe Problem ◽  
Ground Floor ◽  
Initial Design ◽  
The Future ◽  
Water Pumps

In this paper, a test for investigating the vibrational hazards occurred in a modernized hospital was carried out, in which a lot of power equipment such as chilled water pumps and freezers, etc. were installed in the ground floor. The generated vibrations could be experienced on the upper floors including some medical precision room. Next, solation and active control strategies were proposed, and evidently the active control could improve the suppression a lot. This study illustrated that the great vibrational hazards could not be ignored anymore, and the followed resolution strategies for eliminating these vibrations seemed to be urgent. In tradition, the vibration isolations would not be involved in initial design for civil structures, but in fact this might lead to a severe problem to be addressed in the future, and this study could give inspiration for green building.

Unveiling the Future: ASHA Dedicates Green Building

ASHA Leader ◽  
2008 ◽  
Vol 13 (6) ◽  
pp. 3-13
Author(s):  
Dee Naquin Shafer
Keyword(s):  
Green Building ◽  
The Future

scholarly journals Active Control of Greenhouse Climate Enhances Papaya Growth and Yield at an Affordable Cost

Agronomy ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 378
Author(s):  
Irene Salinas ◽  
Juan José Hueso ◽  
Julián Cuevas
Keyword(s):  
Active Control ◽  
Skin Color ◽  
Natural Ventilation ◽  
Control Strategies ◽  
Soluble Solids ◽  
Growth And Yield ◽  
Climate Control ◽  
Tropical Fruit ◽  
Greenhouse Climate ◽  
Solids Content

Papaya is a tropical fruit crop that in subtropical regions depends on protected cultivation to fulfill its climate requirements and remain productive. The aim of this work was to compare the profitability of different climate control strategies in greenhouses located in subtropical areas of southeast Spain. To do so, we compared papayas growing in a greenhouse equipped with active climate control (ACC), achieved by cooling and heating systems, versus plants growing in another greenhouse equipped with passive climate control (PCC), consisting of only natural ventilation through zenithal and lateral windows. The results showed that ACC favored papaya plant growth; flowering; fruit set; and, consequently, yields, producing more and heavier fruits at an affordable cost. Climate control strategies did not significantly improve fruit quality, specifically fruit skin color, acidity, and total soluble solids content. In conclusion, in the current context of prices, an active control of temperature and humidity inside the greenhouse could be a more profitable strategy in subtropical regions where open-air cultivation is not feasible.

The Use of Damping Based Semi-Active Control Algorithms in the Mechanical Smart-Spring System

2017 ◽  
Vol 140 (2) ◽  
Author(s):  
Wander Gustavo Rocha Vieira ◽  
Fred Nitzsche ◽  
Carlos De Marqui
Keyword(s):  
Active Control ◽  
Control Algorithm ◽  
Control Strategies ◽  
Vibration Reduction ◽  
Flow Analysis ◽  
Coupled Systems ◽  
Control Technique ◽  
Control Algorithms ◽  
Control Techniques ◽  
Spring Mechanism

In recent decades, semi-active control strategies have been investigated for vibration reduction. In general, these techniques provide enhanced control performance when compared to traditional passive techniques and lower energy consumption if compared to active control techniques. In semi-active concepts, vibration attenuation is achieved by modulating inertial, stiffness, or damping properties of a dynamic system. The smart spring is a mechanical device originally employed for the effective modulation of its stiffness through the use of semi-active control strategies. This device has been successfully tested to damp aeroelastic oscillations of fixed and rotary wings. In this paper, the modeling of the smart spring mechanism is presented and two semi-active control algorithms are employed to promote vibration reduction through enhanced damping effects. The first control technique is the smart-spring resetting (SSR), which resembles resetting control techniques developed for vibration reduction of civil structures as well as the piezoelectric synchronized switch damping on short (SSDS) technique. The second control algorithm is referred to as the smart-spring inversion (SSI), which presents some similarities with the synchronized switch damping (SSD) on inductor technique previously presented in the literature of electromechanically coupled systems. The effects of the SSR and SSI control algorithms on the free and forced responses of the smart-spring are investigated in time and frequency domains. An energy flow analysis is also presented in order to explain the enhanced damping behavior when the SSI control algorithm is employed.

scholarly journals Synthesis of novel heterocyclic Quinolone compound for anti -tubercular activity

2018 ◽  
Vol 4 (3) ◽  
pp. 44-49
Author(s):  
Rahul K. Godge ◽  
Rahul Kunkulol
Keyword(s):  
Control Strategies ◽  
Secondary Amines ◽  
Organic Reaction ◽  
Severe Problem ◽  
Mycobacterium Tuberculosis H37rv ◽  
Monitoring Tools ◽  
H37rv Strain ◽  
And Control ◽  
Quinolone Derivatives ◽  
Made In

In last few decades, though significant progress has been made in the treatment and control strategies of tubercular infections by introducing new diagnostic and monitoring tools and combination therapy, it still continues to be severe problem. The need of study was only because of there are many drugs in market to treat infection but most of the drugs are showing resistance because of the same it is difficult to treat the infection. In this study we chosen quinolone nucleus for study and over it.  Thus with the aim of developing novel molecule with improved potency for treating Mycobacterium tuberculosis H37Rv strain infections and with decreased probability of developing drug resistance. Methodology: The synthesis of Quinolone derivatives, starting from substituted aniline and ethyl acetoacetate, by conventional organic reaction and results of investigations of their anti-mycobacterial activity. Results: MICs of the synthesized compounds are compared with existing drugs Cytotoxicity. The substituted quinolones are synthesized by taking mixture of 7-substituted-2-(3-chloro-2-oxopropyl) quinolin-4(1H)-one and different secondary amines.  Many compounds have shown promising activity while some were inactive. Conclusion: It was found that Compound A1, A3, B1, B3, have shown promising anti tubercular activity whereas compound A2, A4,B2,B4 were showing moderate anti tubercular activity  against std. Streptomycin. 

Comparative research on semi-active control strategies for magneto-rheological suspension

2009 ◽  
Vol 59 (3) ◽  
pp. 433-453 ◽  
Author(s):  
Xiao-min Dong ◽  
Miao Yu ◽  
Chang-rong Liao ◽  
Wei-min Chen
Keyword(s):  
Active Control ◽  
Comparative Research ◽  
Control Strategies ◽  
Magneto Rheological

scholarly journals The Application of Principles of Green Building in Traditional Housing in Iraq

2015 ◽  
Vol 747 ◽  
pp. 7-11
Author(s):  
Maryam Qays Oleiwi ◽  
Ayat Ali ◽  
Nangkula Utaberta ◽  
Mastor Surat
Keyword(s):  
Developing Countries ◽  
Global Warming ◽  
Natural Resources ◽  
Green Building ◽  
Developed Countries ◽  
Green Buildings ◽  
Climatic Changes ◽  
Global Issue ◽  
The Future ◽  
Definition Of

Green building has become an important issue among architects and urban planners due to the increment in global warming risks and climatic changes which influenced negatively on natural resources. It is also one of measures been put forward to alleviate the significant impacts of the influence of buildings on the environment, society and economy. There have been extensive studies on green buildings, as evidenced in the rapid growing number of papers been published in last decades. These studies have been conducted in both developed countries and developing countries, indicating this is a global issue. However, there is lack of extensive researches on the green buildings in Iraq that is crucial for the future exerts. This paper reports the definition of green building, the environmental, social and economical aspects of green building, and application of green building's principles in traditional housing in Iraq.

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