scholarly journals Analysis of the existing legal, regulatory and technical support for the prevention of environmental emergencies at gas pipeline facilities in Uzbekistan

2021 ◽  
Vol 937 (2) ◽  
pp. 022025
Author(s):  
S Khodjaeva ◽  
M Musaev ◽  
Sh Akhmedov
Keyword(s):  
Mechanical Damage ◽  
Corrosion Damage ◽  
Gas Pipeline ◽  
Safety Concept ◽  
Diagnostics And Control ◽  
Emergency Situations ◽  
Operational Diagnostics ◽  
And Control ◽  
Pipeline Safety

Abstract Operation of new and existing pipeline systems is carried out in accordance with the relevant instructions, with technical inspections, diagnostics and control carried out, if necessary. In accordance with the pipeline safety concept being developed, the possibility of operational diagnostics of the occurrence and development of emergency situations should be provided. Analysis of data for the last years of gas pipeline operation indicates the occurrence of various environmental emergency situations. Therefore, the task of this study is to classify the factors of accidents and damage to gas pipelines with the determination of the main share of the most significant. The proportion of emergencies due to mechanical damage to pipes by machines and mechanisms during excavation has maximum values. This indicates that during this period of time, many violations of technological regulations were registered. With regard to emergencies due to corrosion damage, there is some stability. As can be evidenced in this research paper, mainly accidents, repairs and leaks occur in summer - winter periods.

Analysis on Effectiveness of Landslide Control Based on Internal Force Monitoring of Anti-Slide Piles

2010 ◽  
Vol 163-167 ◽  
pp. 1274-1280
Author(s):  
Qing Lu Deng ◽  
Da Peng Zhu
Keyword(s):  
Stable State ◽  
Internal Force ◽  
Gas Pipeline ◽  
Landslide Risk ◽  
Control Effectiveness ◽  
Landslide Mass ◽  
Force Monitoring ◽  
Engineering Significance ◽  
And Control ◽  
Pipeline Safety

Landslide, rock falling, river erosion are the serious geological disasters that make effect on Zhongxian-Wuhan gas pipeline safety, and the landslide is the most outstanding disasters among them, and anti-slide pile was often used to reinforce landslide mass. However, computation and design of anti-slide pile approximation in actual`dge issues that worth further studying. Irrational design of anti-slide pile can result in landslide risk still exist, landslide is still possible to failed, and conservative design although eliminate landslide risk, and at same time it causes waste of money. So it has important theoretical and engineering significance to verify the accuracy of the design and assess control effectiveness of landslide based on internal force monitoring of anti-slide pile. Based on axial force monitoring main reinforcement inner anti-slide pile, this paper gets the factual moment variation of anti-slide pile of Shunxi No.1 at different times, and compared factual moment with theory moment calculated by the commonest M method. The result showed that the theory measurement calculated by M method is much more then factual moment, so it is safe to compute internal force of piles by M method. Currently, it indicates that the landslide after treatment is under a stable state because of less stress acting on the pile, and the main threat to the gas pipeline will vanished, and the expected control aim is achieved. It has great reference for internal force design of anti-slide pile retaining structure and control effectiveness evaluation.

scholarly journals Determination of state of electrical equipment by spectra of wattmetrograms

2021 ◽  
Vol 288 ◽  
pp. 01042
Author(s):  
Valeriy Manakhov ◽  
Alexey Tsvetkov
Keyword(s):  
Rapid Development ◽  
Digital Processing ◽  
Electrical Equipment ◽  
Production Equipment ◽  
Diagnostics And Control ◽  
Ability To Work ◽  
Technical Data ◽  
Improve Energy Efficiency ◽  
And Control

The purpose of the work is to develop a method of diagnostics and control of oil production equipment to improve energy efficiency and optimize operation modes, through the use of a wattmeter program and its spectrum. The method of diagnostics according to the wattmetrogram is based on obtaining the active power spent by the electric motor for one period of rocking of the rocker. Analysis of the spectrum of wattmetrograms makes it possible to more accurately diagnose defects of this equipment. Thus, control over the spectra of the wattmetrogram is a more accurate and promising method of diagnosing equipment. Materials and methods: In the development of this issue, both domestic and foreign literature was used. The technical data of the control stations and sensors were used on the basis of actual electrical equipment. The prospects and benefits of using diagnostic options weltmetropole: relatively small number of sensors (current and voltage transformers); ability to measure the electric power consumed by the drive; ability to integrate with automated systems of technical and commercial electricity metering; the task is relevant already today, but it is quite promising in the future, due to the rapid development of technologies that allow for digital processing of wattmetrograms; use of these technologies in practice; economic advantages over similar representatives of this segment; service life of more than 20 years; ability to work in a wide temperature range -40 — +60.

Ultrastructural changes in sciatic nerve tissue: Effects of passive maternal smoking

1983 ◽  
Vol 41 ◽  
pp. 650-651
Author(s):  
Amankwah K.S. ◽  
A.D. Weberg ◽  
R.C. Kaufmann
Keyword(s):  
Sciatic Nerve ◽  
Maternal Smoking ◽  
Ultrastructural Level ◽  
Uranyl Acetate ◽  
Nerve Tissue ◽  
Ultrastructural Changes ◽  
Cacodylate Buffer ◽  
And Control ◽  
Spontaneous Delivery

Previous research has revealed that passive (involuntary inhalation) tobacco smoking during gestation can have adverse effects upon the developing fetus. These prior investigations did not concentrate on changes in fetal morphology. This study was undertaken to delineate fetal neural abnormalities at the ultrastructural level in mice pups exposed in utero to passive maternal smoking.Pregnant study animals, housed in a special chamber, were subjected to cigarette smoke daily from conception until delivery. Blood tests for determination of carbon monoxide levels were run at 15-18 days gestation. Sciatic nerve tissue from experimental and control animals were obtained following spontaneous delivery and fixed in 2.5% gluteraldehyde in 0.1M cacodylate buffer pH 7.3. The samples were post-fixed in osmium ferrocyanide (1:1 mixture of 1.5% aqueous OSO4 and 2.5% K4 Fe(CN)6). Following dehydration, the tissues were infiltrated with and embedded in Spurr. Sections were stained with uranyl acetate and lead citrate.

Application of EDS Technique for OSP Film Thickness Measurement

2006 ◽  
Author(s):  
Prong Kongsubto ◽  
Sirarat Kongwudthiti
Keyword(s):  
Thin Film ◽  
Quantitative Analysis ◽  
Joint Strength ◽  
Critical Factor ◽  
Thickness Measurement ◽  
Ic Manufacturing ◽  
And Control ◽  
Film Thickness Measurement ◽  
Non Destructive

Abstract Organic solderability preservatives (OSPs) pad is one of the pad finishing technologies where Cu pad is coated with a thin film of an organic material to protect Cu from oxidation during storage and many processes in IC manufacturing. Thickness of OSP film is a critical factor that we have to consider and control in order to achieve desirable joint strength. Until now, no non-destructive technique has been proposed to measure OSP thickness on substrate. This paper reports about the development of EDS technique for estimating OSP thickness, starting with determination of the EDS parameter followed by establishing the correlation between C/Cu ratio and OSP thickness and, finally, evaluating the accuracy of the EDS technique for OSP thickness measurement. EDS quantitative analysis was proved that it can be utilized for OSP thickness estimation.

Forecasting the fl ood situation using space images in the city of Tavda Sverdlovsk region

2018 ◽  
Vol 934 (4) ◽  
pp. 46-52
Author(s):  
A.S. Bruskova ◽  
T.I. Levitskaya ◽  
D.M. Haydukova
Keyword(s):  
Water Levels ◽  
Economic Damage ◽  
Geoinformation System ◽  
Space Images ◽  
Geoinformation Systems ◽  
Emergency Situations ◽  
The Earth ◽  
Maximum Water ◽  
The City

Flooding is a dangerous phenomenon, causing emergency situations and causing material damage, capable of damaging health, and even death of people. To reduce the risk and economic damage from flooding, it is necessary to forecast flooding areas. An effective method of forecasting emergency situations due to flooding is the method of remote sensing of the Earth with integration into geoinformation systems. With the help of satellite imagery, a model of flooding was determined based on the example of Tavda, the Sverdlovsk Region. Space images are loaded into the geoinformation system and on their basis a series of thematic layers is created, which contains information about the zones of possible flooding at given water level marks. The determination of the area of flooding is based on the calculation of the availability of maximum water levels at hydrological stations. According to the calculated security data, for each hydrological post, flood zones are constructed by interpolation between pre-calculated flood zones of standard security. The results of the work can be used by the Main Directorate of the Ministry for Emergency Situations of Russia for the Sverdlovsk Region.

scholarly journals Biodegradation of Poly(Lactic Acid) Biocomposites under Controlled Composting Conditions and Freshwater Biotope

Polymers ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 594
Author(s):  
Pavel Brdlík ◽  
Martin Borůvka ◽  
Luboš Běhálek ◽  
Petr Lenfeld
Keyword(s):  
Degradation Rate ◽  
Poly Lactic Acid ◽  
Screw Extruder ◽  
Flat Film ◽  
Twin Screw ◽  
Acetyl Tributyl Citrate ◽  
And Control ◽  
Aerobic Biodegradability ◽  
Qualitative Analyses

The influence of additives such as natural-based plasticiser acetyl tributyl citrate (ATBC), CaCO3 and lignin-coated cellulose nanocrystals (L-CNC) on the biodegradation of polylactic acid (PLA) biocomposites was studied by monitoring microbial metabolic activity through respirometry. Ternary biocomposites and control samples were processed by a twin-screw extruder equipped with a flat film die. Commonly available compost was used for the determination of the ultimate aerobic biodegradability of PLA biocomposites under controlled composting conditions (ISO 14855-1). In addition, the hydro-degradability of prepared films in a freshwater biotope was analysed. To determine the efficiency of hydro-degradation, qualitative analyses (SEM, DSC, TGA and FTIR) were conducted. The results showed obvious differences in the degradation rate of PLA biocomposites. The application of ATBC at 10 wt.% loading increased the biodegradation rate of PLA. The addition of 10 wt.% of CaCO3 into the plasticised PLA matrix ensured an even higher degradation rate at aerobic thermophilic composting conditions. In such samples (PLA/ATBC/CaCO3), 94% biodegradation in 60 days was observed. In contrast, neat PLA exposed to the same conditions achieved only 16% biodegradation. Slightly inhibited microorganism activity was also observed for ternary PLA biocomposites containing L-CNC (1 wt.% loading). The results of qualitative analyses of degradation in a freshwater biotope confirmed increased biodegradation potential of ternary biocomposites containing both CaCO3 and ATBC. Significant differences in the chemical and structural compositions of PLA biocomposites were found in the evaluated period of three months.

scholarly journals Viscoelastometry for detecting oral anticoagulants

2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Philipp Groene ◽  
Daniela Wagner ◽  
Tobias Kammerer ◽  
Lars Kellert ◽  
Andreas Giebl ◽  
...  
Keyword(s):  
Healthy Volunteers ◽  
Prospective Observational Study ◽  
Oral Anticoagulants ◽  
Plasma Concentrations ◽  
Factor Xa ◽  
Clotting Time ◽  
Emergency Situations ◽  
Tissue Plasminogen ◽  
The Impact

Abstract Background Determination of anticoagulant therapy is of pronounced interest in emergency situations. However, routine tests do not provide sufficient insight. This study was performed to investigate the impact of anticoagulants on the results of viscoelastometric assays using the ClotPro device. Methods This prospective, observational study was conducted in patients receiving dabigatran, factor Xa (FXa)-inhibitors, phenprocoumon, low molecular weight heparin (LMWH) or unfractionated heparin (UFH) (local ethics committee approval number: 17–525-4). Healthy volunteers served as controls. Viscoelastometric assays were performed, including the extrinsic test (EX-test), intrinsic test (IN-test) Russel’s viper venom test (RVV-test), ecarin test (ECA-test), and the tissue plasminogen activator test (TPA-test). Results 70 patients and 10 healthy volunteers were recruited. Clotting time in the EX-test (CTEX-test) was significantly prolonged versus controls by dabigatran, FXa inhibitors and phenprocoumon. CTIN-test was prolonged by dabigatran, FXa inhibitors and UFH. Dabigatran, FXa inhibitors and UFH significantly prolonged CTRVV-test in comparison with controls (median 200, 207 and 289 vs 63 s, respectively; all p < 0.0005). Only dabigatran elicited a significant increase in CTECA-test compared to controls (median 307 vs 73 s; p < 0.0001). CTECA-test correlated strongly with dabigatran plasma concentration (measured by anti-IIa activity; r = 0.9970; p < 0.0001) and provided 100% sensitivity and 100% specificity for detecting dabigatran. Plasma concentrations (anti-XA activity) of FXa inhibitors correlated with CTRVV-test (r = 0.7998; p < 0.0001), and CTRVV-test provided 83% sensitivity and 64% specificity for detecting FXa inhibitors. Conclusions In emergency situations, ClotPro viscoelastometric assessment of whole-blood samples may help towards determining the presence and type of anticoagulant class that a patient is taking. Trial registration German clinical trials database ID: DRKS00015302.

Advanced high-performance processing tools for diagnostics and control in fusion devices

2021 ◽  
Vol 170 ◽  
pp. 112529
Author(s):  
N. Cruz ◽  
A.J.N. Batista ◽  
J.M. Cardoso ◽  
B.B. Carvalho ◽  
P.F. Carvalho ◽  
...  
Keyword(s):  
High Performance ◽  
Diagnostics And Control ◽  
And Control
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