scholarly journals Stand-by spillways in phreatic dams

2018 ◽  
Vol 196 ◽  
pp. 02008 ◽  
Author(s):  
Andrey Mikhasek ◽  
Maxim Rodionov ◽  
Nikolay Malyugin ◽  
Artem Klimov
Keyword(s):  
Discharge Coefficient ◽  
Human Factor ◽  
The Body ◽  
Economic Losses ◽  
Program Complex ◽  
Emergency Situations ◽  
Synthetic Materials ◽  
Downstream Slope ◽  
The Usa ◽  
Technical Construction

Hydraulic structures operation is always connected with accident risks. The authors analyzed emergency situations which affected dams located on the territory of the USA and Russia. This analysis showed that the most dangerous accident which took place at hydroelectric complexes is an overfall through the crest of the dam accompanied with the formation of washouts and blow-out waves. The most striking example here is the accident at St. Francis dam. According to most researchers, its main cause was the human factor. To reduce economic losses which are due to an accident on the hydro-technical construction and to reduce the risk of human influence, the authors propose to use a stand-by spillway in the body of a phreatic dam. For this purpose, they introduce two constructions. The first construction has a melting insert and a spillway channel fastening made of synthetic materials. The second one has filtering covering of a crest and a downstream slope made of coarse-pored concrete. The researchers perform physical and numerical modeling of the developed structures to compare them. On the basis of laboratory experiments and calculations in the program complex, they obtain discharge coefficient values for various spillways, which can be later used for calculating spillway capacity as well as for its construction.

ACE-2-Receptors of the Epidermis, Dermal Vascular Walls and Sebaceous Gland Cells: The Way of COVID-19 Entry into the Body?

2020 ◽  
Author(s):  
Stefan Bittmann
Keyword(s):  
Clinical Trials ◽  
Viral Infection ◽  
Sebaceous Gland ◽  
The Body ◽  
Viral Agent ◽  
Therapy Options ◽  
Vascular Walls ◽  
Fish Market ◽  
The World ◽  
The Usa

Since the outbreak near a fish market in Wuhan, China, in December 2019, researchers have been searching for an effective therapy to control the spreading of the new coronavirus SARS-CoV-2 and inhibit COVID-19 infection. Many countries like Italy, Spain, and the USA were ambushed by this viral agent. To date, more than 2.5 million people were infected with SARS-CoV-2. There is no clear answer, why SARS-CoV-2 infects so many people so fast. To date of April 2020, no effective drug has been found to treat this new severe viral infection. There are many therapy options under review and clinical trials were initiated to get clearer information, what kind of drug can help in this devastating and serious situation. The world has no time.

scholarly journals Pathophysiology of Fever and Application of Infrared Thermography (IRT) in the Detection of Sick Domestic Animals: Recent Advances

Animals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 2316
Author(s):  
Daniel Mota-Rojas ◽  
Dehua Wang ◽  
Cristiane Gonçalves Titto ◽  
Jocelyn Gómez-Prado ◽  
Verónica Carvajal-de la Fuente ◽  
...  
Keyword(s):  
Body Temperature ◽  
Infrared Thermography ◽  
Core Body Temperature ◽  
The Body ◽  
Farm Animals ◽  
Economic Losses ◽  
Febrile Response ◽  
Temperature Range ◽  
Stable Temperature ◽  
Core Body

Body-temperature elevations are multifactorial in origin and classified as hyperthermia as a rise in temperature due to alterations in the thermoregulation mechanism; the body loses the ability to control or regulate body temperature. In contrast, fever is a controlled state, since the body adjusts its stable temperature range to increase body temperature without losing the thermoregulation capacity. Fever refers to an acute phase response that confers a survival benefit on the body, raising core body temperature during infection or systemic inflammation processes to reduce the survival and proliferation of infectious pathogens by altering temperature, restriction of essential nutrients, and the activation of an immune reaction. However, once the infection resolves, the febrile response must be tightly regulated to avoid excessive tissue damage. During fever, neurological, endocrine, immunological, and metabolic changes occur that cause an increase in the stable temperature range, which allows the core body temperature to be considerably increased to stop the invasion of the offending agent and restrict the damage to the organism. There are different metabolic mechanisms of thermoregulation in the febrile response at the central and peripheral levels and cellular events. In response to cold or heat, the brain triggers thermoregulatory responses to coping with changes in body temperature, including autonomic effectors, such as thermogenesis, vasodilation, sweating, and behavioral mechanisms, that trigger flexible, goal-oriented actions, such as seeking heat or cold, nest building, and postural extension. Infrared thermography (IRT) has proven to be a reliable method for the early detection of pathologies affecting animal health and welfare that represent economic losses for farmers. However, the standardization of protocols for IRT use is still needed. Together with the complete understanding of the physiological and behavioral responses involved in the febrile process, it is possible to have timely solutions to serious problem situations. For this reason, the present review aims to analyze the new findings in pathophysiological mechanisms of the febrile process, the heat-loss mechanisms in an animal with fever, thermoregulation, the adverse effects of fever, and recent scientific findings related to different pathologies in farm animals through the use of IRT.

scholarly journals User agreements and makerspaces: a content analysis

2015 ◽  
Vol 116 (7/8) ◽  
pp. 358-368 ◽  
Author(s):  
Heather Michele Moorefield-Lang
Keyword(s):  
Content Analysis ◽  
Academic Libraries ◽  
Technology Use ◽  
Academic Library ◽  
The Body ◽  
Library Science ◽  
Learning Space ◽  
Content Type ◽  
The Usa ◽  
Qualitative Data Analysis Software

Abstract – The purpose of this paper is to analyze the user agreements of makerspaces in public and academic libraries. User agreements, also known as maker agreements, user forms and liability forms, can be very important documents between library patrons, staff and faculty. User agreements are similar to the earlier creation of acceptable use policies for technology use in libraries. The author of this study will delve into the user agreements created for public and academic libraries across the USA. Design/methodology/approach – The researcher used content analysis to investigate 24 different user agreements written for public and academic library makerspaces. NVivo qualitative data analysis software was integrated into this research to aid in the breakdown of commonalities across terms, themes and purpose within the user agreements. Findings – Although makerspaces are a very exciting topic in the field of library science at this time, the implementation of a maker learning space is still new to many libraries. Creating a user agreement for a makerspace is newer still. Most user agreements in this study were six months to a year old. Some consistencies found across makerspace user agreements include liability waivers, permissions for minors, safety, copyright and technology replacement costs. Originality/value – At this time, most publications on makerspaces are held in the realm of popular publications (blogs, magazines, zines, etc.). The body of peer-reviewed and scholarly research on makerspaces is growing. Makerspace user agreements are new to this growing field of interest, and a content analysis of these documents will pave the way for the writing of future forms.

Analysis of Collapsed Chimney of Balco Power Plant in India

2011 ◽  
Vol 250-253 ◽  
pp. 2229-2233 ◽  
Author(s):  
Yu Feng Zhang ◽  
Chao Li
Keyword(s):  
Power Plant ◽  
Central India ◽  
Economic Losses ◽  
Cylinder Wall ◽  
Design Codes ◽  
Initial Part ◽  
Scientific Analysis ◽  
The Usa ◽  
Stormy Weather ◽  
Under Construction

A large under-construction chimney at BALCO Power Plant in central India collapsed on Sep. 23, 2009 under severe stormy weather, causing serious casualties and massive economic losses, while another, similarly built, survived. So far, there has been no strict and scientific analysis on the cause of the accident. In this paper, finite element method is used to simulate the effect of wind loads and the whole collapse procedure based on the investigation of information about the design, the construction, the site related records, etc. The results show that the initial part of the chimney destroyed is the top of the structure (specifically the construction platform and the partial top cylinder wall of the chimney); then the debris from the top fells and crashes the lower part of the structure, eventually leading to the whole structure collapsing. The analysis results are basically consistent with the observation of the debris and the toppling scene and what the witnesses described, and scientifically clarify the actual cause of the chimney collapse. In addition, by comparing the chimney design codes between the USA and China, along with the analysis results, some suggestions are proposed to prevent similar accidents in chimney projects.

The analysis of emergency situations related to fires at nuclear power plants

2021 ◽  
Vol 30 (5) ◽  
pp. 66-75
Author(s):  
S. A. Titov ◽  
N. M. Barbin ◽  
A. M. Kobelev
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Nuclear Reactor ◽  
Reactor Core ◽  
Emergency Situations ◽  
The Usa ◽  
Large Fires ◽  
Short Circuits ◽  
Nuclear Reactor Core

Introduction. The article provides a system and statistical analysis of emergency situations associated with fires at nuclear power plants (NPPs) in various countries of the world for the period from 1955 to 2019. The countries, where fires occurred at nuclear power plants, were identified (the USA, Great Britain, Switzerland, the USSR, Germany, Spain, Japan, Russia, India and France). Facilities, exposed to fires, are identified; causes of fires are indicated. The types of reactors where accidents and incidents, accompanied by large fires, have been determined.The analysis of major emergency situations at nuclear power plants accompanied by large fires. During the period from 1955 to 2019, 27 large fires were registered at nuclear power plants in 10 countries. The largest number of major fires was registered in 1984 (three fires), all of them occurred in the USSR. Most frequently, emergency situations occurred at transformers and cable channels — 40 %, nuclear reactor core — 15 %, reactor turbine — 11 %, reactor vessel — 7 %, steam pipeline systems, cooling towers — 7 %. The main causes of fires were technical malfunctions — 33 %, fires caused by the personnel — 30 %, fires due to short circuits — 18 %, due to natural disasters (natural conditions) — 15 % and unknown reasons — 4 %. A greater number of fires were registered at RBMK — 6, VVER — 5, BWR — 3, and PWR — 3 reactors.Conclusions. Having analyzed accidents, involving large fires at nuclear power plants during the period from 1955 to 2019, we come to the conclusion that the largest number of large fires was registered in the USSR. Nonetheless, to ensure safety at all stages of the life cycle of a nuclear power plant, it is necessary to apply such measures that would prevent the occurrence of severe fires and ensure the protection of personnel and the general public from the effects of a radiation accident.

Vitamin D therapy: problems and prospects

1975 ◽  
Vol 13 (8) ◽  
pp. 29-31
Keyword(s):  
Vitamin D ◽  
Ultraviolet Irradiation ◽  
The Body ◽  
Natural Vitamin ◽  
The Usa ◽  
Solar Ultraviolet ◽  
Regular Intake ◽  
Children Under 5

Natural vitamin D (D3, cholecalciferol) reaches the body from animal sources in the diet and from endogenous skin synthesis by the action of solar ultraviolet irradiation. Vitamin D2 (ergocalciferol) is used for fortifying proprietary foods such as margarine (and milk in the USA and Canada). These compounds have equal potency in man. A regular intake of 2.5 micrograms (100 i.u.) daily for adults and about 10 micrograms (400 i.u.) daily for children under 5 years old is usually recommended to prevent nutritional osteomalacia and rickets.

scholarly journals Gene Variations in Cis-Acting Elements between the Taiwan and Prototype Strains of Porcine Epidemic Diarrhea Virus Alter Viral Gene Expression

Genes ◽  
2018 ◽  
Vol 9 (12) ◽  
pp. 591
Author(s):  
Tsung-Lin Tsai ◽  
Chen-Chang Su ◽  
Ching-Chi Hsieh ◽  
Chao-Nan Lin ◽  
Hui-Wen Chang ◽  
...  
Keyword(s):  
Gene Expression ◽  
Porcine Epidemic Diarrhea Virus ◽  
The Body ◽  
Economic Losses ◽  
Viral Gene ◽  
Sequence Motif ◽  
Cis Acting ◽  
Diarrhea Virus ◽  
Porcine Epidemic Diarrhea ◽  
In Cis

In 2013, the outbreak of porcine epidemic diarrhea (PED) in Taiwan caused serious economic losses. In this study, we examined whether the variations of the cis-acting elements between the porcine epidemic diarrhea virus (PEDV) Taiwan (TW) strain and the prototype strain CV777 alter gene expression. For this aim, we analyzed the variations of the cis-acting elements in the 5’ and 3’ untranslated regions (UTRs) between the PEDV TW, CV777, and other reference strains. We also determined the previously unidentified transcription regulatory sequence (TRS), a sequence motif required for coronavirus transcription, and found that a nucleotide deletion in the TW strain, in comparison with CV777 strain, immediately downstream of the leader core sequence alters the identity between the leader TRS and the body TRS. Functional analyses using coronavirus defective interfering (DI) RNA revealed that such variations in cis-acting elements for the TW strain compared with the CV777 strain have an influence on the efficiency of gene expression. The current data show for the first time the evolution of PEDV in terms of cis-acting elements and their effects on gene expression, and thus may contribute to our understanding of recent PED outbreaks worldwide.

Determination of Discharge Coefficient for Ball Valves With Calibrated Inserts

2004 ◽  
Author(s):  
Gino James Rouss ◽  
William S. Janna
Keyword(s):  
Discharge Coefficient ◽  
Polynomial Equation ◽  
The Body ◽  
Orifice Diameter ◽  
Flow Parameters ◽  
Dimensionless Groups ◽  
Order Polynomial ◽  
Experimental Process ◽  
Power Law Equation

The valve coefficient was measured for 1, 1-1/4, 1-1/2 and 2 nominal ball valves. A recently designed orifice insert was used with these valves to obtain smaller valve coefficients. Orifice inserts were threaded into the body of a ball valve just upstream of the ball itself. The valve coefficient was measured for every insert used with these valves, and an expression was determined to relate the orifice diameter to other pertinent flow parameters. Two dimensionless groups were chosen to correlate the collected data, and expressions were developed that can be used as aids in sizing the orifice insert needed to obtain the desired valve coefficient. The study has shown that a 2nd order polynomial equation as well as a power law equation can both be used to predict the desired results. Knowing pipe size and schedule, the diameter of the orifice insert needed to obtain the required valve coefficient can be approximated with minimum error. An error analysis performed on the collected data shows that the results are highly accurate, and that the experimental process is repeatable.

scholarly journals The Red Machine: The Dehumanization of the Communist Enemy in American Cold War Cinema

2020 ◽  
Vol 8 (2) ◽  
Author(s):  
Oleg Riabov
Keyword(s):  
Cold War ◽  
The Body ◽  
The Political ◽  
Dual Model ◽  
Inanimate Object ◽  
Moral Exclusion ◽  
Human Creativity ◽  
The Us ◽  
The Usa ◽  
Materials Used

This article deals with the US Cold War cinematographic construction of the Soviet enemy. The researcher focuses on the means of dehumanising the communist enemy, external and internal, by equating it to a machine. The author applies Nick Haslam’s dual model of dehumanization (2006), according to which dehumanization is visible in two main forms: animalistic, by associating members of the out-group with animals, and mechanistic, by associating them with a soulless machine. The materials used consist of US films from the “Long Fifties”, in which Hollywood, equating the enemy to machines, developed three plots: the robotic existence of individuals in a totalitarian society; the transformation of Americans into zombies by communists by means of Soviet science; and the body snatching of Americans by an alien mind, an allegory of a future communist occupation of the USA. The article demonstrates that dehumanization was implemented by directly labeling the representatives of the communist world as robots and by attributing to them a lack of emotions, consciousness, will, individuality, initiative, warmth, love, friendship, creative abilities, and even the ability to smile. Such an image of the enemy implied a moral exclusion, treating them as an inanimate object unworthy of empathy, including in the event of their destruction. The author points out that the use of mechanistic dehumanization was very effective. Essentialization of the differences between “us” and “them” occurred: the symbolic border between them is presented as a boundary between living and nonliving. The image of mortal danger was created: the “Red Machine” is strong and merciless, it cannot be moved to pity, and so it is permissible to destroy it. This image contributed to the legitimation of power: the political opponents of the authorities are represented as internal enemies who are anxious to turn Americans into obedient executors of someone else’s will and to deprive them of humanity. At the same time, the machine also has weaknesses, and it is possible to defeat it: since it is devoid of human creativity, it is clearly inferior to the free human spirit embodied in America.

scholarly journals Women Working in Botanic Gardens Globally

2015 ◽  
pp. 33-49
Author(s):  
Katherine Braithwaite
Keyword(s):  
Quantitative Data ◽  
The Body ◽  
Perceived Barriers ◽  
Current Status ◽  
Botanic Gardens ◽  
Educational History ◽  
Qualitative And Quantitative ◽  
The Usa ◽  
Barriers And Opportunities ◽  
Royal Botanic Gardens

This paper represents a condensed account of a thesis produced during the author’s studies at the Royal Botanic Gardens, Kew. The body of work represents the findings from a study into the current status of the barriers and opportunities for women working in botanic gardens. The research makes a global assessment of the careers of women working presently in botanic horticulture and science, from the perspective of those women working in the industry. A survey of 29 questions was produced and distributed to over 800 botanic gardens. With responses from women working across the globe, the report measures and correlates qualitative and quantitative data from participants, assessing areas such as their educational history, opportunities in their workplace, perceived barriers and hopes for the future. The survey produced 573 responses, with women participating from all parts of the globe from the USA to Yemen, New Zealand to Brazil. The report includes an introduction, methodology, a short literature review, the significant findings and conclusions arising from the data.

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