scholarly journals Recommended dependence for hydraulic calculation of gravity drainage networks in order to improve the ecological well-being of cities

2021 ◽  
Vol 937 (4) ◽  
pp. 042021
Author(s):  
O A Prodous ◽  
D I Shlychkov
Keyword(s):  
Well Being ◽  
Hydraulic Calculation ◽  
Gravity Drainage ◽  
Drainage Networks ◽  
Inner Diameter ◽  
Reference Manual

Abstract In the submitted article comparison of two calculated dependences - formulas of A. Chézyand and N.F. Fedorov used for the hydraulic calculation of gravity drainage networksare presented. For a specific example, dependence is revealed - the A. Chézy formula, which gives the highest accuracy when calculating the hydraulic slope of a gravity pipeline. The appearance of the A. Chézy formula has been clarified due to the introduction of the concept of the reduced inner diameter of the pipes. The graph of the dependence i=f (dred) is plotted, indicating that the refined form of the A. Chézy formula is more accurate. It is recommended to use the A. Chézy formula in a refined form for the hydraulic calculation of gravity drainage networks. It is proposed to develop calculation tables for the hydraulic calculation of drainage networks with internal deposits. The analysis of the calculated dependencies for the hydraulic calculation of gravity drainage networks with internal deposits presented in the paper allows recommending for practical use the formula of A. Chézy refined by the authors, according to which the authors propose to develop the Reference manual “Tables for the hydraulic calculation of gravity drainage networks with internal deposits”.

Technical regulation for the values of hydraulic parameters of used metal pipes in order to extend the period of their use

2021 ◽  
Vol 18 (3) ◽  
pp. 421-427
Author(s):  
Oleg A. PRODOUS ◽  
◽  
Lev D. TEREKHOV ◽  
Petr P. YAKUBCHIK ◽  
Alexander S. CHERNIKH ◽  
...  
Keyword(s):  
Practical Importance ◽  
Hydraulic Calculation ◽  
Technical Regulation ◽  
Supply Networks ◽  
Steel Pipes ◽  
Head Losses ◽  
Metal Pipes ◽  
Inner Diameter ◽  
Pumping Equipment ◽  
The Given

Objective: To compare the characteristics of hydraulic potential in worn steel pipes with internal deposits subjected to cleaning by mechanical and chemical methods. Methods: Calculated dependencies are used for hydraulic calculation of new metal pipes and pipes with internal deposits. Results: A calculated dependence was obtained to determine the value of the inner diameter of pipes with any thickness of the layer of internal deposits. The concept of an efficient pipeline is introduced and a comparison made of the values of head losses in new pipes and in pipes with internal deposits. A specific practical example is considered. For the given example, compare the values of energy consumption of pumping equipment for two methods of cleaning the inner surface of pipes. Measures are indicated to ensure the efficiency of operation of water supply networks. Practical importance: It is shown that the chemical method of technical regulation of the hydraulic characteristics of new steel pipes provides an extension of the period of their further use.

scholarly journals Hydraulic calculations of storm sewer networks

2020 ◽  
Vol 163 ◽  
pp. 03012
Author(s):  
Oleg Primin ◽  
Andrey Ten ◽  
Daria Khudyakova
Keyword(s):  
Russian Federation ◽  
Atmospheric Precipitation ◽  
Storm Water ◽  
Hydraulic Calculation ◽  
Water Drainage ◽  
Software Products ◽  
Run Off ◽  
Drainage Networks ◽  
The Russian Federation ◽  
European Standards

Surface run-off (SR) produced on the territory of cities and other settlement as a result of atmospheric precipitation is an intensive source of the technogenic pollution of environment, including the waterbodies. In accordance with the existing legislation of the Russian Federation, SR requires organized disposal and treatment according to the standards of regulatory documents. In this article we analyze the European document BS EN 752:2017 with regard to determining the flow-rates of surface (storm-water) run-off, and the calculations are made by the authors, which demonstrate that the application of foreign software products is impossible in Russia, due to the differences between the existing Russian regulatory and methodological documents and the European standards. Nevertheless, for the development of electronic models of hydraulic calculations for a storm-water drainage network, the mathematical relationship, which most adequately characterizes the type of surface run-off hydrograph most frequent for the territory of the Russian Federation as a result of atmospheric precipitation, was found. The relevant algorithm of the hydraulic calculation of storm-water drainage networks was also developed.

Influence of the Accuracy of Determining the Inner Diameter of Pressure Polyethylene Pipes by the Amount of Head Loss by Length

2018 ◽  
Vol 284 ◽  
pp. 1012-1017
Author(s):  
Maria A. Vasilyeva
Keyword(s):  
State Standard ◽  
Head Loss ◽  
Hydraulic Calculation ◽  
Hydraulic Characteristics ◽  
Polyethylene Pipes ◽  
Inner Diameter ◽  
Made In

The article presents the results of the analysis of the requirements of All Union State standard No18599-2001 to the thickness of the walls of pressure polyethylene pipes. An example of hydraulic calculation of a pipeline made of polyethylene PE 100 with a diameter d = 315 mm is considered. It is made in two versions - without taking into account and with allowance for dimensional tolerances stipulated by the requirements of the standard. The influence of the limitations on the thickness of the pipe walls on the values of their internal diameters and hydraulic characteristics is analyzed.

The Relationship Between Hearing Loss Self-Management and Hearing Aid Benefit and Satisfaction

2019 ◽  
Vol 28 (2) ◽  
pp. 274-284 ◽  
Author(s):  
Elizabeth Convery ◽  
Gitte Keidser ◽  
Louise Hickson ◽  
Carly Meyer
Keyword(s):  
Decision Making ◽  
Hearing Loss ◽  
Hearing Aids ◽  
Clinical Decision Making ◽  
Hearing Aid ◽  
Well Being ◽  
Self Report ◽  
Self Management ◽  
Hearing Aid Benefit ◽  
The Relationship

Purpose Hearing loss self-management refers to the knowledge and skills people use to manage the effects of hearing loss on all aspects of their daily lives. The purpose of this study was to investigate the relationship between self-reported hearing loss self-management and hearing aid benefit and satisfaction. Method Thirty-seven adults with hearing loss, all of whom were current users of bilateral hearing aids, participated in this observational study. The participants completed self-report inventories probing their hearing loss self-management and hearing aid benefit and satisfaction. Correlation analysis was used to investigate the relationship between individual domains of hearing loss self-management and hearing aid benefit and satisfaction. Results Participants who reported better self-management of the effects of their hearing loss on their emotional well-being and social participation were more likely to report less aided listening difficulty in noisy and reverberant environments and greater satisfaction with the effect of their hearing aids on their self-image. Participants who reported better self-management in the areas of adhering to treatment, participating in shared decision making, accessing services and resources, attending appointments, and monitoring for changes in their hearing and functional status were more likely to report greater satisfaction with the sound quality and performance of their hearing aids. Conclusion Study findings highlight the potential for using information about a patient's hearing loss self-management in different domains as part of clinical decision making and management planning.

Inclusion of Transgender Voice and Communication Training in a University Clinic

2017 ◽  
Vol 2 (10) ◽  
pp. 109-115 ◽  
Author(s):  
Jennifer Oates ◽  
Georgia Dacakis
Keyword(s):  
Training Program ◽  
Clinical Education ◽  
Well Being ◽  
Evidence Base ◽  
Communication Training ◽  
Speech Language Pathology ◽  
Transgender People ◽  
Language Pathology ◽  
Effectiveness Of Training ◽  
Negative Impacts

Because of the increasing number of transgender people requesting speech-language pathology services, because having gender-incongruent voice and communication has major negative impacts on an individual's social participation and well-being, and because voice and communication training is supported by an improving evidence-base, it is becoming more common for universities to include transgender-specific theoretical and clinical components in their speech-language pathology programs. This paper describes the theoretical and clinical education provided to speech-language pathology students at La Trobe University in Australia, with a particular focus on the voice and communication training program offered by the La Trobe Communication Clinic. Further research is required to determine the outcomes of the clinic's training program in terms of student confidence and competence as well as the effectiveness of training for transgender clients.

Improving Feeding Outcomes in the NICU: Moving From Volume-Driven to Infant-Driven Feeding

2010 ◽  
Vol 19 (3) ◽  
pp. 68-74 ◽  
Author(s):  
Catherine S. Shaker
Keyword(s):  
Intensive Care Unit ◽  
Dynamic Systems ◽  
Neonatal Intensive Care ◽  
Well Being ◽  
Dynamic Systems Theory ◽  
Feeding Problems ◽  
Care Giving ◽  
Extremely Preterm ◽  
Extremely Preterm Infants

Current research on feeding outcomes after discharge from the neonatal intensive care unit (NICU) suggests a need to critically look at the early underpinnings of persistent feeding problems in extremely preterm infants. Concepts of dynamic systems theory and sensitive care-giving are used to describe the specialized needs of this fragile population related to the emergence of safe and successful feeding and swallowing. Focusing on the infant as a co-regulatory partner and embracing a framework of an infant-driven, versus volume-driven, feeding approach are highlighted as best supporting the preterm infant's developmental strivings and long-term well-being.

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