scholarly journals VALIDATION OF RISK INDICATORS IN ASSESSING THE SAFETY OF ELECTRICAL EQUIPMENT BOILER HOUSE IN THUNDERSTORM

Fire Safety ◽  
2021 ◽  
Vol 38 ◽  
pp. 24-31
Author(s):  
Yu. Rudyk ◽  
O. Nazarovets ◽  
I. Golovatchuk ◽  
N. Beznos
Keyword(s):  
Risk Assessment ◽  
High Risk ◽  
Electrical Equipment ◽  
Risk Indicators ◽  
Economic Losses ◽  
Individual Risk ◽  
Lightning Protection ◽  
Protection Measures ◽  
Risk Of Death ◽  
Boiler Environment

Introduction. Today requires the introduction and arrangement of modern enterprises automation of the technological process using various electronic and electrical equipment. The breakdown of one sensor leads to a stoppage of the technical process and thousands of losses. This equipment is sensitive to impulse overvoltages that occur for various reasons, as well as when hit by lightning. There is a misconception that the danger of lightning arises only when struck directly, forgetting about the socalled secondary phenomena, namely electromagnetic and electrostatic pulses. Pulse overvoltage is a short-term increase in voltage above the allowable value. Lightning protection systems are designed and designed to protect objects from dangerous lightning.Purpose. Given the automation of the process and the saturation of boilers with electronic and electrical equipment, there is a high risk of lightning and high potentials, which can lead to large-scale accidents. The purpose of this article is to validate the risk indicators for the boiler environment that occur during a thunderstorm.Methods. The use of various methods of calculation, assessment and ordering of risks during the design and layout of the system allows to implementation system lightning protection of buildings, equipment and people. General principles of risk assessment for the boiler environment must take into account: risk and determine the need for protection; the contribution of various risk components to the overall risk; the effect of various protection measures to reduce risk; selection of protection measures taking into account their economic efficiency.Results. Neglecting the high risk of a dangerous event leads to excessive damage and m irreparable losses, with which a person or community will not be able to achieve sustainable development. Therefore, it is a comprehensive, systematic approach to achieving safety, starting from the assessment stage, should take into account both the characteristics of the hazard, including a fire in the relevant facilities, and personal, the individual risk of death or injury. Lightning is an unpredictable natural event, no one in the world fully understands the mechanism of lightning and it is impossible to provide 100% protection under any circumstances under any standardization. For this purpose, the following calculations are given: loss of human life, including injuries; loss of the ability to provide public services; losses of cultural heritage and economic value of the building (structure) and economic losses required for the installation and operation of the system. Based on the obtained data, it is seen how the reduction of each risk is achieved depending on the proposed solution and the economic effect in general.Conclusion. Statistics on deaths and injuries from lightning hazards, losses from damage to property, buildings and struc-tures confirm that in risk assessment, which is standardized in DSTU EN 62305-2, it is necessary to introduce a methodology that would meet the conditions of Ukraine. The arrangement of the lightning protection system depends on the risk assessment, the reaction of the owner, the influence of control bodies. Therefore, it is important to decide on fire protection measures in lightning risk assessment procedures, but it can also be taken regardless of the results of the risk assessment where there is a desire to avoid unacceptable risk. Equipment that is often associated with two different services, e.g. power lines and data lines suffer a lot of surge damage. This case is not covered by the RX risk component. However, appropriate protection measures can be selected and established (see IEC 62305-4).

scholarly journals New Functional Possibilities of Fire Detectors for Residential and Industrial Rooms

2019 ◽  
Vol 10 (4) ◽  
pp. 341-352
Author(s):  
V. O. Kitikov ◽  
E. V. Ternov ◽  
A. V. Danilenko ◽  
N. I. Mukhurov ◽  
S. V. Denisyuk
Keyword(s):  
Gas Sensors ◽  
Graphical Representation ◽  
Carbon Monoxide Poisoning ◽  
Integrated Approach ◽  
Electrical Equipment ◽  
Economic Losses ◽  
Risk Of Death ◽  
Advantages And Disadvantages ◽  
Hazardous Gases ◽  
Material Values

The relevance of early detection of fire signs is quite obvious because due to the necessary measures for evacuating of people and material values, disconnecting the electrical equipment and extinguishing the fire at the time of the onset of fire or passive smoldering, human casualties can be completely avoided and economic losses can be minimized.A graphical representation of fire detectors' the classification in the form of a generalized scheme using all the main classification features, their advantages and disadvantages is given. The optimal areas for the use of detectors depending on the fire load are determined. The effectiveness of combined fire detectors' use, equipped in addition to traditional smoke and heat sensors with gas sensors, as an integrated approach to the organization of control over protected objects is shown.The results of development of highly sensitive two-zone sensor with sensitive elements based on iron oxide films for detecting the release of explosive and poisonous gases in the initial stage of decay before the formation of ignition conditions are presented. The use of gas sensors that respond to hazardous gases in the environment significantly reduces the risk of death due to carbon monoxide poisoning.

Discuss on Lightning Protection of Electrical Engineering

2013 ◽  
Vol 416-417 ◽  
pp. 1808-1812
Author(s):  
Hong Juan Peng
Keyword(s):  
System Analysis ◽  
Electrical Engineering ◽  
Rapid Development ◽  
Electrical Equipment ◽  
Economic Losses ◽  
Lightning Protection ◽  
Construction Technology ◽  
Reinforced Concrete Structure ◽  
Protection Engineering ◽  
Modern Building

Electric is one of the important resources of daily life, has great significance for the development of the national economy and the improvement of living standards. With the rapid development of construction in China, building electrical engineering is becoming more and more prominent, especially the lightning protection engineering in building electrical. Compared with the traditional housing construction, modern building construction gradually tends to be high development of reinforced concrete structure, more prone to lightning disaster, modern buildings have power lines and electrical equipment perplexing, once the lightning disaster, will cause huge economic losses, but also may cause casualties, therefore, lightning protection, pay attention to building electrical engineering is necessary. This paper introduces the lightning harm and building lightning protection system, analysis of the lightning protection design problem in building electrical engineering, discusses the matters needing attention in construction technology of electrical protection.

scholarly journals Risk assessment in the North Caucasus ski resorts

2016 ◽  
Vol 16 (10) ◽  
pp. 2227-2234 ◽  
Author(s):  
Anton Y. Komarov ◽  
Yury G. Seliverstov ◽  
Tatyana G. Glazovskaya ◽  
Alla S. Turchaninova
Keyword(s):  
Risk Assessment ◽  
Quantitative Data ◽  
Large Scale ◽  
Economic Feasibility ◽  
Individual Risk ◽  
Federal Law ◽  
North Caucasus ◽  
Protection Measures ◽  
The North ◽  
Avalanche Risk

Abstract. Avalanches pose a significant problem in most mountain regions of Russia. The constant growth of economic activity, and therefore the increased avalanche hazard, in the North Caucasus region lead to demand for the development of large-scale avalanche risk assessment methods. Such methods are needed for the determination of appropriate avalanche protection measures as well as for economic assessments.The requirement of natural hazard risk assessments is determined by the Federal Law of the Russian Federation (Federal Law 21.12.1994 N 68-FZ, 2016). However, Russian guidelines (SNIP 11-02-96, 2013; SNIP 22-02-2003, 2012) are not clearly presented concerning avalanche risk assessment calculations. Thus, we discuss these problems by presenting a new avalanche risk assessment approach, with the example of developing but poorly researched ski resort areas. The suggested method includes the formulas to calculate collective and individual avalanche risk. The results of risk analysis are shown in quantitative data that can be used to determine levels of avalanche risk (appropriate, acceptable and inappropriate) and to suggest methods to decrease the individual risk to an acceptable level or better. The analysis makes it possible to compare risk quantitative data obtained from different regions, analyze them and evaluate the economic feasibility of protection measures.

scholarly journals Vector Surveillance, Host Species Richness, and Demographic Factors as West Nile Disease Risk Indicators

Viruses ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 934
Author(s):  
John M. Humphreys ◽  
Katherine I. Young ◽  
Lee W. Cohnstaedt ◽  
Kathryn A. Hanley ◽  
Debra P. C. Peters
Keyword(s):  
Risk Assessment ◽  
Species Richness ◽  
Host Species ◽  
Disease Risk ◽  
The United States ◽  
Risk Indicators ◽  
Vector Surveillance ◽  
West Nile ◽  
Risk Of Death ◽  
The Us

West Nile virus (WNV) is the most common arthropod-borne virus (arbovirus) in the United States (US) and is the leading cause of viral encephalitis in the country. The virus has affected tens of thousands of US persons total since its 1999 North America introduction, with thousands of new infections reported annually. Approximately 1% of humans infected with WNV acquire neuroinvasive West Nile Disease (WND) with severe encephalitis and risk of death. Research describing WNV ecology is needed to improve public health surveillance, monitoring, and risk assessment. We applied Bayesian joint-spatiotemporal modeling to assess the association of vector surveillance data, host species richness, and a variety of other environmental and socioeconomic disease risk factors with neuroinvasive WND throughout the conterminous US. Our research revealed that an aging human population was the strongest disease indicator, but climatic and vector-host biotic interactions were also significant in determining risk of neuroinvasive WND. Our analysis also identified a geographic region of disproportionately high neuroinvasive WND disease risk that parallels the Continental Divide, and extends southward from the US–Canada border in the states of Montana, North Dakota, and Wisconsin to the US–Mexico border in western Texas. Our results aid in unraveling complex WNV ecology and can be applied to prioritize disease surveillance locations and risk assessment.

Characteristics and clinical course of the first 500 patients (pts) from SPHERE (SelexiPag: tHe usErs dRug rEgistry) receiving selexipag in real-world clinical practice

2020 ◽  
Vol 41 (Supplement_2) ◽  
Author(s):  
V McLaughlin ◽  
K.B Highland ◽  
A.R Hemnes ◽  
N.H Kim ◽  
K.M Chin ◽  
...  
Keyword(s):  
Risk Assessment ◽  
High Risk ◽  
Median Time ◽  
Real World ◽  
Maintenance Dose ◽  
Clinical Course ◽  
Low Risk ◽  
Funding Source ◽  
Risk Of Death ◽  
Disease Characteristics

Abstract Background SPHERE is a US, multicentre, prospective registry collecting real-world data from pts with pulmonary arterial hypertension (PAH) treated with selexipag, a selective oral IP prostacyclin receptor agonist. Methods SPHERE (planned N=800) included newly initiated (NI, receiving selexipag ≤60 days) and previously initiated (PI) pts. We describe disease characteristics, selexipag dose and clinical course of the first 500 pts and risk assessment based on REVEAL 2.0 risk calculator and COMPERA risk assessment strategy. Results Disease characteristics at initiation were: 75.0% female, median age 61.0 years, idiopathic etiology (49.2%) or associated with connective tissue disease (26.4%). Pts were mostly WHO functional class (FC) II (31.0%) or III (49.6%) (unknown for 9.2%). Median time from PAH diagnosis to selexipag initiation was 3.4 years. Of the first 500 pts enrolled, 138 (28%) were NI and 362 (72%) were PI; characteristics were consistent between NI and PI. Risk classification at initiation differed depending on method used: with REVEAL 2.0, low/intermediate/high risk were 41.8%/29.6%/28.6% (38.4%/26.1%/35.5% for NI and 43.1%/30.9%/26.0% for PI, respectively) and with COMPERA were 22.0%/67.2%/9.6% (13.8%/73.2%/10.9% for NI and 25.1%/64.9%/9.1% for PI), respectively. Note, missing variables in real-world registry data may affect risk assessment. In both cohorts, median individualised maintenance dose was 1200 μg twice daily (NI 1000 μg, PI 1200 μg); median time to individualised maintenance dose was 8.1 weeks. Median treatment duration was 21.7 months (17.7 months NI, 25.8 months PI). Overall, 32.4% of pts discontinued selexipag (46.4% NI, 27.1% PI), most commonly (22.8%) for adverse events (AEs) (34.8% NI, 18.2% PI). Of note, disease progression is classified as an AE. No selexipag-related deaths were reported. At 18 months, WHO FC improved/remained stable in the majority of pts (205/235, 87%; improved, 24%; stable, 63%), but worsened in 12.8% of pts. At 18 months, the majority of pts had improved/stable risk by REVEAL 2.0 (265/334, 79% [improved, 22%; stable, 57%]) and by COMPERA (255/316, 81% [improved, 23%; stable, 58%]). This was consistent for NI and PI. For both risk assessment tools higher risk was associated with increased risk of death. With REVEAL 2.0, risk of death was 2.9 and 9.3 times higher for intermediate and high risk, respectively vs low risk. Similarly with COMPERA, risk of death was 3.2 and 11.4 times higher in intermediate and high risk, respectively vs low risk. Conclusions Of the first 500 pts in SPHERE, the vast majority were prevalent PAH cases in FC II or III. Around one-quarter of pts had improved FC and/or risk; the majority of pts remained stable risk. Higher risk was associated with increased mortality risk. Over 50% of pts completed 18 months of selexipag. Discontinuations were most commonly for AEs and/or PAH progression. Funding Acknowledgement Type of funding source: Private company. Main funding source(s): Actelion Pharmaceuticals US, Inc.

scholarly journals CURRENT APPROACHES IN THE SYSTEM LIGHTNING PROTECTION ARRANGEMENT OF BUILDINGS IN VIEW OF FIRE HAZARD AND PERSONAL RISK

Fire Safety ◽  
2018 ◽  
pp. 88-94
Author(s):  
Yu. Rudyk ◽  
O. Nazarovets ◽  
I. Golovatchuk
Keyword(s):  
Risk Assessment ◽  
Systematic Approach ◽  
Fire Hazard ◽  
Protection System ◽  
National Standard ◽  
Individual Risk ◽  
Lightning Protection ◽  
Technical Regulation ◽  
Protective Measures ◽  
Protection Systems

Introduction. The complexity and power of a natural phenomenon with hazardous and dangerous properties, which is lightning, should be adequately evaluated and prevented at the most accessible organizational and technical level of a particular society. According to the principle of ALARA (as low as reasonably achievable) applied in post-industrial countries, this risk, like others, should be reduced to the extent that is achievable. Neglecting to take a high risk of a hazardous event leads to excessive damage and large irreparable losses that a person or community cannot achieve sustainable development. Therefore, it is the complex, systematic approach in achieving safety, from the stage of assessment, to take into account both the characteristics of hazards, including fire in the relevant facilities, as well as personal, individual risk of death or injury. Purpose. Concerning to the situation with the systematic approach to technical regulation in Ukraine of such a safety sector as lightning protection, it is precisely this neglect that does not correspond to the current potential of the industrial, scientific, regulatory and social development levels. The purpose of this article is to analyze this problem in several areas. The state of technical regulation shows the priority of bringing normative documents into compliance with the legislation. Methods. Application of various methods of calculation, estimation, design and layout of the system allows realizing lightning protection system of buildings, equipment and people. To this aim, comparative characteristics of the passive and active lightning protection systems offered on the market are given; protective angle, rolling sphere, geometric methods of direct impact intercepting are compared. Results. Lightning is an unpredictable natural event; no one in the world is fully understand the mechanism of lightning, it is impossible for any standardization to provide 100% protection in all circumstances. In this view no liability shall attach to IEC and any other publications. Consideration of the implementation of the protection system grounded part is postponed with the condition of its full compliance with the selected components and the configuration of the system as a whole. System calculation of protection and assessment of the individual risk level is impossible without the internal elements and links in lightning protection system. A number of identified gaps in regulatory documents, the relationship between regulatory and supervisory bodies, users requests are suggested in the conclusions. The analysis of active normative and technical requirements to the lightning protection systems is conducted and the necessity of additional protective measures from the direct strike of lightning or voltage induction by a remote discharge by protective measures choice and charts of their setting is determined. On this basis the schemes of application of lightning protective systems from impulsive overvoltage are complemented, that substantially reduces the risk of fires and individual injures. Conclusion. The statistics of death and injury from lightning hazardous factors, losses from property, buildings and structures damages confirms that in the risk assessment, which is standardized in DSTU EN 62305-2, it is necessary to introduce a methodology that complies with the conditions of Ukraine. Further application in the design of lightning protection systems of the national standard ДСТУ Б.В.2.5-38:2008 went beyond the technical regulation system of Ukraine. Arrangement of system lightning protection depends on: risk assessment, owner response, and influence of regulatory and supervisory bodies. Criteria for fire hazard of a facility require a more complete analysis by the supervise bodies and the owner, the methodology of which has not been implemented for today. The development of such criteria is carried out in the workgroup 1 of the Technical Committee 315, which involves the scientists of the LSULS.

scholarly journals The blues, and an almost shocking surprise – Unexpected PE in a catatonic patient, that almost had ECT

BJPsych Open ◽  
2021 ◽  
Vol 7 (S1) ◽  
pp. S130-S130
Author(s):  
Michael Cheah ◽  
Ashma Mohamed ◽  
Anand Mathilakath
Keyword(s):  
Risk Assessment ◽  
High Risk ◽  
Psychiatric Inpatients ◽  
Sudden Onset ◽  
Near Miss ◽  
Psychotic Depression ◽  
Risk Of Death ◽  
Successful Recovery ◽  
Increased Risk ◽  
Early Intervention In Psychosis

AimsTo present a case of a near-miss, where an unexpected Pulmonary Embolism (PE) was identified in a patient with psychotic depression and catatonia, who almost had Electroconvulsive Therapy (ECT). Our aim is to highlight the importance of Venous-Thrombo Embolism (VTE) risk assessment in all psychiatric inpatients, particularly those with catatonia, and those about to undergo ECT.MethodA 53-year-old female admitted with her first presentation of psychotic depression, catatonia, poor oral intake, and significant weight loss in the community for months prior to admission. She was recommended for emergency ECT as the severity of her self-neglect was becoming life threatening. Her first ECT session was cancelled due to low potassium levels prior to ECT, which proved to be a fortunate event. She developed sudden onset chest pain the next day, and following further medical investigations; was diagnosed to have a bilateral PE, and subsequently treated with Apixaban. Due to the potential risk of ECT dislodging the clots, treatment was done by optimising medication alone; Venlafaxine 300 mg, Mirtazapine 45 mg, Haloperidol 6 mg. She made a slow but successful recovery, and was discharged home, with ongoing support from Early Intervention in Psychosis services.ResultWe conducted a literature search, and it is well known that there is an increased risk of VTE in catatonic patients, as well as other psychiatric inpatients; due to anti-psychotic medication. Furthermore, cases have been reported where ECT was associated with increased risk of death in patients with known VTE/PE.On retrospective review of the patient's risks of developing VTE in the community, it was clear, that she was at very high risk of developing VTE. It was also noted that she should have had a VTE risk assessment on admission, in accordance with NICE guidelines; where all acute psychiatric inpatients should have this assessed as soon as possible.ConclusionThrough a process of assessment and treatment, VTE is often preventable. Identification of high-risk patients on admission to hospital is therefore crucial. It is thus, imperative that a comprehensive VTE risk assessment is completed on admission and regularly reviewed.This case highlights the risk of missing VTE assessments in WAA Inpatients, particularly those with catatonia, about to undergo ECT, which could have been fatal. As such, VTE/PE risk assessment in such patients, about to undergo ECT, is particularly crucial.Clinicians need to have a high index of suspicion of VTE/PE, particularly in patients with catatonia.

Risk score – valuable tool for individual risk assessment?

2008 ◽  
Vol 56 (S 1) ◽  
Author(s):  
B Osswald ◽  
G Thomas ◽  
U Tochtermann ◽  
V Gegouskov ◽  
D Badowski-Zyla ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Risk Score ◽  
Individual Risk ◽  
Individual Risk Assessment

TWILIGHT: A Randomized Trial of Ticagrelor Monotherapy Versus Ticagrelor Plus Aspirin Beginning at 3 Months in High-risk Patients Undergoing Percutaneous Coronary Intervention

2020 ◽  
Vol 14 ◽  
Author(s):  
Johny Nicolas ◽  
Usman Baber ◽  
Roxana Mehran
Keyword(s):  
Percutaneous Coronary Intervention ◽  
High Risk ◽  
Antiplatelet Therapy ◽  
Dual Antiplatelet Therapy ◽  
Coronary Intervention ◽  
Bleeding Events ◽  
High Risk Patients ◽  
Risk Of Death ◽  
Percutaneous Coronary ◽  
Risk Patients

A P2Y12 inhibitor-based monotherapy after a short period of dual antiplatelet therapy is emerging as a plausible strategy to decrease bleeding events in high-risk patients receiving dual antiplatelet therapy after percutaneous coronary intervention. Ticagrelor With Aspirin or Alone in High-Risk Patients After Coronary Intervention (TWILIGHT), a randomized double-blind trial, tested this approach by dropping aspirin at 3 months and continuing with ticagrelor monotherapy for an additional 12 months. The study enrolled 9,006 patients, of whom 7,119 who tolerated 3 months of dual antiplatelet therapy were randomized after 3 months into two arms: ticagrelor plus placebo and ticagrelor plus aspirin. The primary endpoint of interest, Bleeding Academic Research Consortium type 2, 3, or 5 bleeding, occurred less frequently in the experimental arm (HR 0.56; 95% CI [0.45–0.68]; p<0.001), whereas the secondary endpoint of ischemic events was similar between the two arms (HR 0.99; 95% CI [0.78–1.25]). Transition from dual antiplatelet therapy consisting of ticagrelor plus aspirin to ticagrelor-based monotherapy in high-risk patients at 3 months after percutaneous coronary intervention resulted in a lower risk of bleeding events without an increase in risk of death, MI, or stroke.

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