ASSESSMENT OF THE IMPACT OF CHANGES IN THE CHARACTERISTICS OF EXTREME HEAVY RAINS ON THE RELIABILITY OF HYDRAULIC STRUCTURES

2021 ◽  
pp. 99-105
Author(s):  
N. P. KARPENKO ◽  
◽  
A. A. NAUMOVA ◽  
V. V. ILJINICH
Keyword(s):  
Daily Precipitation ◽  
Accurate Method ◽  
Operational Reliability ◽  
Hydraulic Structures ◽  
Normative Values ◽  
Expert Assessment ◽  
Main Hypothesis ◽  
Regulatory Documents ◽  
Maximum Water ◽  
The Impact

The article on the observations of weather stations in the south-west of the Chernozem (Black Earth) zone of Russia checks the main hypothesis about the increase in the maximum daily precipitation which is the basis for calculating the maximum water consumption when designing reservoirs of hydraulic structures on small catchments. Statistical calculations showed a clear regional trend towards an increase in the maximum daily precipitation over time. Studies have confirmed a significant asymmetry in the distribution of their values, the ratio between the coefficients of asymmetry and variation ranges from 2 to 5. It isnoted that there is currently no sufficiently accurate method for determining the coefficients of asymmetry, therefore, approaches to their expert assessment have been proposed. It isrecommended to estimate the normative values of the maximum daily precipitation for erosion calculations using empirical probability curves. Thus, in the current regulatory documents intended for the design of hydraulic structures, there are shortcomings in the methods for determining hydro meteorological characteristics which leads to a decrease in their operational reliability during the passage of dangerous rain floods. The necessity of appropriate updating of the existing regulatory documents is substantiated.

NUMERICAL STUDY OF THE STATE OF SOIL DAMS AS A RESULT OF IMPACT OF SHOCK WAVES AND UNSTEADY LOADS

2021 ◽  
pp. 55-62
Author(s):  
E. V. ANDREEV ◽  
Keyword(s):  
Shock Waves ◽  
Numerical Study ◽  
Pressure Head ◽  
Operational Reliability ◽  
Hydraulic Structures ◽  
Time Interval ◽  
Short Time Interval ◽  
Urgent Task ◽  
Temperature Dependences ◽  
The Impact

At the stage of the life cycle, ensuring the operational reliability and safety of pressure head hydraulic structures is an urgent task. One of the serious threats at the present stage is the destruction of hydraulic structures by the impact of non-stationary loads, by directed explosions in the immediate vicinity of the structures or on their surface. Shock waves pose a serious threat to hydraulic structures. Impulse short-term impact on the solid surfaces of hydraulic structures or on the aquatic environment characterizes the specifi cs of the problem under consideration, as the nonstationary of the process of motion of continuous media into which, in a short time interval, a volume of energy can be released that can deform or completely destroy them. Scenarios of this kind can occur either in the immediate vicinity of a hydraulic structure or as a result of the collision of solid bodies on its surface. Water upstream of the hydro technical structure and its body is a complex liquid because many of its characteristics differ significantly in size from similar characteristics of other liquids or have so-called anomalies on pressure and temperature dependences.

scholarly journals Assessment of the impact of climatic characteristics and landscape changes on the maximum flow of small watersheds

Vestnik MGSU ◽  
2021 ◽  
pp. 1228-1235
Author(s):  
Vitaly V. Ilinich ◽  
Aleksey V. Perminov ◽  
Anna A. Naumova
Keyword(s):  
Maximum Flow ◽  
Surface Flow ◽  
Practical Significance ◽  
Hydraulic Structures ◽  
Landscape Changes ◽  
Landscape Characteristics ◽  
The Past ◽  
Maximum Water ◽  
The Impact ◽  
Small Catchments

Introduction. The article dedicated to safety of hydraulic structures in small catchments. The research consists in the development of a methodology for assessment of influence of climatic and landscape changes on the maximum flow which determins sizes for the construction elements. The practical significance is due to the assessment of changes in the reliability of hydraulic structures, as well as the degree of potential flooding of territories and soil erosion during rain floods. In scientific terms, the practical significance lies in the justification of changes in the parameters of the formula for the maximum flow calculating. The main goal of the study was to test hypotheses about an increase in the intensity of storm rainfalls and of changes in landscape characteristics during recent decades. Accordingly the next problems were desided: assessment the increase in the daily maximums of precipitation and landscape changes over the past decades; as well as assessing the degree of influence of the above factors on the increase in the maximum water. Materials and methods. The data of the network weather station and the landscape characteristics of the catchment area served as the research materials. Methods of statistical analysis and geoinformation technologies were used as research methods. Results. The main results of the research were the characteristics of the increase in maximum daily precipitation and landscape changes over the past decades and the characteristics of their influence on the increase in maximum water flow, obtained on the base of probability theory and of the surface flow theory. Conclusions. A confirmation of the effectiveness of the proposed methodology for assessing changes in the climatic and landscape characteristics of catchments and their impact on the flood maximums. The hydraulic structures built both in the second half of the twentieth century on small catchments, and in subsequent years when using existing building regulations that do not have proper updating have lost their original reliability.

Epigenetic Studies in Psychotherapy: A Systematic Review

2020 ◽  
Vol 16 (2) ◽  
pp. 86-92
Author(s):  
Rafael Penadés ◽  
Bárbara Arias ◽  
Mar Fatjó-Vilas ◽  
Laura González-Vallespí ◽  
Clemente García-Rizo ◽  
...  
Keyword(s):  
Systematic Review ◽  
Dna Methylation ◽  
Mental Disorders ◽  
Epigenetic Modifications ◽  
Symptom Improvement ◽  
Epigenetic Changes ◽  
Main Hypothesis ◽  
Psychological Treatments ◽  
Time Period ◽  
The Impact

Background: Epigenetic modifications appear to be dynamic and they might be affected by environmental factors. The possibility of influencing these processes through psychotherapy has been suggested. Objective: To analyse the impact of psychotherapy on epigenetics when applied to mental disorders. The main hypothesis is that psychological treatments will produce epigenetic modifications related to the improvement of treated symptoms. Methods: A computerised and systematic search was completed throughout the time period from 1990 to 2019 on the PubMed, ScienceDirect and Scopus databases. Results: In total, 11 studies were selected. The studies were evaluated for the theoretical framework, genes involved, type of psychotherapy and clinical challenges and perspectives. All studies showed detectable changes at the epigenetic level, like DNA methylation changes, associated with symptom improvement after psychotherapy. Conclusion: Methylation profiles could be moderating treatment effects of psychotherapy. Beyond the detected epigenetic changes after psychotherapy, the epigenetic status before the implementation could act as an effective predictor of response.

scholarly journals Driver Liability Assessment in Vehicle Collisions in Spain

2021 ◽  
Vol 18 (4) ◽  
pp. 1475
Author(s):  
Almudena Sanjurjo-de-No ◽  
Blanca Arenas-Ramírez ◽  
José Mira ◽  
Francisco Aparicio-Izquierdo
Keyword(s):  
Road Safety ◽  
Accurate Estimation ◽  
Main Hypothesis ◽  
Self Organizing Maps ◽  
Safety Measures ◽  
Vehicle Collisions ◽  
Promising Tool ◽  
Visual Clustering ◽  
Open Question ◽  
The Impact

An accurate estimation of exposure is essential for road collision rate estimation, which is key when evaluating the impact of road safety measures. The quasi-induced exposure method was developed to estimate relative exposure for different driver groups based on its main hypothesis: the not-at-fault drivers involved in two-vehicle collisions are taken as a random sample of driver populations. Liability assignment is thus crucial in this method to identify not-at-fault drivers, but often no liability labels are given in collision records, so unsupervised analysis tools are required. To date, most researchers consider only driver and speed offences in liability assignment, but an open question is if more information could be added. To this end, in this paper, the visual clustering technique of self-organizing maps (SOM) has been applied to better understand the multivariate structure in the data, to find out the most important variables for driver liability, analyzing their influence, and to identify relevant liability patterns. The results show that alcohol/drug use could be influential on liability and further analysis is required for disability and sudden illness. More information has been used, given that a larger proportion of the data was considered. SOM thus appears as a promising tool for liability assessment.

631 Sleep SMART in Adolescents with Neurodevelopmental Disorders

SLEEP ◽  
2021 ◽  
Vol 44 (Supplement_2) ◽  
pp. A247-A248
Author(s):  
Alyson Hanish ◽  
Abbey Jo Klein ◽  
Therese Mathews ◽  
Ann Berger ◽  
Kevin Kupzyk ◽  
...  
Keyword(s):  
Sleep Disturbance ◽  
Neurodevelopmental Disorders ◽  
Sleep Disturbances ◽  
Immediate Release ◽  
Sleep Time ◽  
Normative Values ◽  
Exogenous Melatonin ◽  
Contingency Contracting ◽  
Sleep Questionnaires ◽  
The Impact

Abstract Introduction: Introduction Sleep disturbances are common in adolescents with neurodevelopmental disorders (NDDs). Inclusion of vulnerable populations such as adolescents with NDDs into sleep intervention efforts is essential as they are at high-risk for poor physical/mental health outcomes. The objective of this study is to pilot a sequential, multiple assignment, randomized trial (SMART) design to compare the impact of a sequence of sleep interventions, based on treatment response, to optimize sleep health in adolescents with NDDs. Methods: Methods Recruitment began June 2019 using convenience sampling. The SMART pilot feasibility study includes 1-week of baseline sleep data, and two 4-week periods of a sleep intervention (9-week total study enrollment). Interventions include exogenous melatonin, The Bedtime Bank, and their combination. Exogenous melatonin (liquid, immediate release, 3mg) is administered 30 minutes before bedtime. The Bedtime Bank, a behavioral sleep intervention, is based upon contingency contracting that relies on a credit- or debt-based system to hold adolescents accountable for maintaining a consistent bedtime. At baseline participants completed demographics, PROMIS pediatric sleep questionnaires, the Cleveland Adolescent Sleepiness Questionnaire (CASQ), salivary & urinary endogenous melatonin measurement, and one week of actigraphy. Upon enrollment, participants were randomly assigned to either melatonin or The Bedtime Bank. Participants who respond (nightly increase in total sleep time (TST) ≥18 minutes) remain on the assigned intervention; if non-responsive participants are re-randomized to a different sleep intervention or combination. Results: Results At baseline, participants (n=29, aged 10–18 years) had an average TST of 7 hours 11 minutes. PROMIS Sleep Disturbance (M=64.3, SE=2.5), PROMIS Sleep-Related Impairment scores (M=58.9, SE=2.2), and CASQ scores (M=40.0, SD= 10.5) were higher than reported normative values. Salivary DLMO & urinary 6-sulfatoyxmelatonin analysis is ongoing. For participants who completed the full 9-week trial, nearly 30% (n=7/24) were responsive (increased baseline TST ≥18 minutes) to one of the 4-week interventions. Conclusion: Conclusion Baseline data of the enrolled participants demonstrates poor indicators of TST, sleep disturbance, and sleep related impairment. Preliminary results of this SMART indicate some adolescents are responsive to sleep interventions aimed to improve their TST. Support (if any) Support: This clinical trial is funded by the National Institute of Nursing Research, National Institutes of Health (1K01NR017465-01A1).

scholarly journals Research of the Technical Seismicity Due to Blasting Works in Quarries and Their Impact on the Environment and Population

2021 ◽  
Vol 11 (5) ◽  
pp. 2118
Author(s):  
Jan Feher ◽  
Jozef Cambal ◽  
Blazej Pandula ◽  
Julian Kondela ◽  
Marian Sofranko ◽  
...  
Keyword(s):  
Particle Velocity ◽  
Normative Values ◽  
Internal Environment ◽  
Negative Effects ◽  
Vibration Acceleration ◽  
Limit Values ◽  
Vibration Intensity ◽  
Timing Interval ◽  
Millisecond Timing ◽  
The Impact

Vibrations caused by blasting works have an impact not only on buildings but also the internal environment of the buildings. If these buildings are situated in the surroundings of quarries, the citizens can perceive these vibrations negatively. By applying an appropriate millisecond timing interval, it is possible to lower the intensity of vibrations to the levels that the citizens will not perceive as negative effects inside the buildings. The limit values for this vibration intensity have not been defined to date. For the protection of the building from the vibrations, normative values of the particle velocity and frequency were determined. Hygienic standards for the inhabitants of the housing were applied, which assessed the impact of the vibration on humans through the measurement of the vibration acceleration in the housing. In this article, the results of the research carried out in Trebejov Quarry are presented. The experimental blasts carried out in Trebejov Quarry proved that the reduction in the vibration intensity under the value 2 mm.s−1 led to the satisfaction of the inhabitants.

Transgovernmental Interaction in the International Monetary System, 1960–1972

1973 ◽  
Vol 27 (4) ◽  
pp. 431-464 ◽  
Author(s):  
Robert W. Russell
Keyword(s):  
International Monetary System ◽  
Policy Formation ◽  
Economic Policies ◽  
Interaction Patterns ◽  
Industrialized Countries ◽  
Actor Model ◽  
Main Hypothesis ◽  
Monetary System ◽  
Rational Actor ◽  
The Impact

The main hypothesis of this article is that transgovernmental interaction among central banks and finance ministries of industrialized countries was as significant in economic policy formation as intergovernmental interaction. Elite interview data indicate, however, that the international consultative process among deputy central bank governors and deputy finance ministers conformed more closely to the intergovernmental image of international politics than had been expected. Both interaction patterns within the deputies’ consultative group and the impact of international consultations upon national economic policies could be explained moderately well in terms of a unified rational actor model. Examination of the transgovernmental interaction does suggest ways to systematically modify and improve interpretations based upon the rational actor model. In addition, the degree of politicization of issues may prove to be a reliable guide when deciding whether the transgovernmental dimension of an issue requires detailed study.

scholarly journals ENSO and Wintertime Extreme Precipitation Events over the Contiguous United States

2008 ◽  
Vol 21 (1) ◽  
pp. 22-39 ◽  
Author(s):  
Siegfried D. Schubert ◽  
Yehui Chang ◽  
Max J. Suarez ◽  
Philip J. Pegion
Keyword(s):  
United States ◽  
West Coast ◽  
Extreme Precipitation ◽  
East Coast ◽  
Daily Precipitation ◽  
Precipitation Variability ◽  
The West ◽  
Extreme Precipitation Events ◽  
The Impact ◽  
Precipitation Events

Abstract In this study the authors examine the impact of El Niño–Southern Oscillation (ENSO) on precipitation events over the continental United States using 49 winters (1949/50–1997/98) of daily precipitation observations and NCEP–NCAR reanalyses. The results are compared with those from an ensemble of nine atmospheric general circulation model (AGCM) simulations forced with observed SST for the same time period. Empirical orthogonal functions (EOFs) of the daily precipitation fields together with compositing techniques are used to identify and characterize the weather systems that dominate the winter precipitation variability. The time series of the principal components (PCs) associated with the leading EOFs are analyzed using generalized extreme value (GEV) distributions to quantify the impact of ENSO on the intensity of extreme precipitation events. The six leading EOFs of the observations are associated with major winter storm systems and account for more than 50% of the daily precipitation variability along the West Coast and over much of the eastern part of the country. Two of the leading EOFs (designated GC for Gulf Coast and EC for East Coast) together represent cyclones that develop in the Gulf of Mexico and occasionally move and/or redevelop along the East Coast producing large amounts of precipitation over much of the southern and eastern United States. Three of the leading EOFs represent storms that hit different sections of the West Coast (designated SW for Southwest coast, WC for the central West Coast, and NW for northwest coast), while another represents storms that affect the Midwest (designated by MW). The winter maxima of several of the leading PCs are significantly impacted by ENSO such that extreme GC, EC, and SW storms that occur on average only once every 20 years (20-yr storms) would occur on average in half that time under sustained El Niño conditions. In contrast, under La Niña conditions, 20-yr GC and EC storms would occur on average about once in 30 years, while there is little impact of La Niña on the intensity of the SW storms. The leading EOFs from the model simulations and their connections to ENSO are for the most part quite realistic. The model, in particular, does very well in simulating the impact of ENSO on the intensity of EC and GC storms. The main model discrepancies are the lack of SW storms and an overall underestimate of the daily precipitation variance.

LEGAL REGULATION IN THE IMPLEMENTATION OF A SET OF MEASURES AIMED AT ENSURING THE OPERATIONAL RELIABILITY AND SAFETY OF OWNERLESS HYDRAULIC STRUCTURES

2020 ◽  
Vol 3 (82) ◽  
pp. 81-88
Author(s):  
Z.M. Kadiev ◽  
◽  
A.N. Kochetov ◽  
Keyword(s):  
Legal Regulation ◽  
Operational Reliability ◽  
Hydraulic Structures

На территориях, поднадзорных Федеральной службе по экологическому, технологическому и атомному надзору, территориальными Управлениями в рамках возложенных полномочий, проводятся регулярные работы, направленные на выявление и сокращение количества бесхозяйных гидротехнических сооружений. Статус гидротехнического сооружения в качестве бесхозяйного, являющегося объектом, создающими повышенную опасность для населения, требует принятия незамедлительных мер по постановке их на учет и передаче в собственность и/или оперативное управление эксплуатирующей организации для обеспечения безопасности с целью предотвращения чрезвычайных ситуаций и стихийных бедствий. Законодатель уделил особое внимание вопросу соблюдения обязательных требований безопасности бесхозяйных ГТС. И отнес их к наиболее вероятно опасным объектам хозяйственного права. Отсутствие собственника и/или эксплуатирующей организации, подготовленного и аттестованного штата обслуживающих сооружения специалистов, не может не отразиться на потенциальной опасности самого сооружения и, как следствие, территории его расположения. Эти события могут послужить причиной возникновения ситуаций, влекущих за собой негативные последствия, ввиду наличия опасности для жизни и здоровья людей, проживающих на данной территории.

Selection and evaluation of suppliers as a quality control element for bakery products

2021 ◽  
pp. 21-25
Author(s):  
Natalia A. Jurk ◽  
Keyword(s):  
Physicochemical Parameters ◽  
Raw Materials ◽  
Objective Assessment ◽  
Expert Assessment ◽  
Control Element ◽  
Bakery Products ◽  
Regulatory Documents ◽  
Tree Diagram ◽  
Organoleptic Parameters

The article presents research in the field of quality management by suppliers of dairy whey to a bakery enterprise in the Omsk region. The general assessment criteria are systematized in the form of a tree diagram, which makes it possible to identify them depending on the target orientation. When evaluating suppliers, such fundamental elements as the quality of purchased raw materials, their cost and timeliness of delivery were taken into account. The results of an expert assessment of the organoleptic parameters of serum, controlled physicochemical parameters and subsequent regression analysis made it possible to establish their compliance with the requirements of regulatory documents. A comprehensive assessment of the possibilities allowed us to give an objective assessment, as well as to make a decision on choosing in favor of one of the suppliers.

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