Suggestions to the test procedure for technical means of protection of steel welded domestic LPG gas cylinders from physical destruction in fire

2021 ◽  
pp. 67-72
Author(s):  
Владимир Леонидович Малкин ◽  
Владимир Александрович Угорелов ◽  
Петр Алексеевич Леончук ◽  
Руслан Андреевич Загуменников
Keyword(s):  
Coming Out ◽  
Test Procedure ◽  
Video Recording ◽  
Heating System ◽  
Measuring System ◽  
Cylinder Surface ◽  
In Fire ◽  
Gas Leaks ◽  
The Impact ◽  
Gas Cylinders

Разработана методика проведения испытаний технических средств защиты стальных сварных бытовых баллонов для сжиженных углеводородных газов (СУГ) от физического разрушения при воздействии на них пожара. В методике содержатся требования к отбору газовых баллонов, рассматриваемым модельным сценариям, установке для испытаний, мероприятиям по подготовке испытаний, порядку их проведения, к отчету о проведении испытаний. Использование предлагаемой методики позволит с высокой степенью достоверности оценивать эффективность применения технических средств защиты стальных бытовых баллонов для СУГ от физического разрушения при воздействии пожара. The paper contains proposals for inclusion in the testing methodology for technical means of protecting gas cylinders from physical destruction. The proposals relate to the choice of typical scenarios characteristic for emergencies and fire development in a room with LPG cylinders: the ingress of cylinders into the fire center, the impact on the cylinder surface of the heat flow of the adjacent fire center; the impact on the surface of the cylinder of LPG vapors jet combustion, simulating the effect of combustion of LPG vapors coming out of the outlet of the valve (safety valve or membrane) of the adjacent cylinder. The design of the installation for testing cylinders in accordance with the above scenarios is presented. There are given requirements for the test preparation procedure, including the verification of documentation, installation of technical protective equipment, filling and delivery of cylinders, checking for gas leaks from cylinders after delivery, installation for testing. A detailed description of the installation procedure is given in accordance with the presented diagrams for various test scenarios. The basic diagrams of the measuring system for the pressure inside the cylinder, mounting of thermocouples on the wall of the cylinder, and remote supply of liquid fuel to trays are described. There is described the test procedure, which consists of turning on the recording systems, gas supplying to the installation, activating the cylinder heating system, video recording of the experiment with timing, closing the valve in front of the pressure sensor after the end of combustion, discharging LPG from the sealed cylinder to the burner. The requirements for the composition of the test report are given, which make it possible to confirm the reliability of the experiments.

Mobile Phones' Video Recording Tool

2021 ◽  
Vol 11 (2) ◽  
pp. 16-32
Author(s):  
Van Huynh Ha Le ◽  
Huy Ngoc Nguyen
Keyword(s):  
Foreign Language ◽  
Mixed Method ◽  
Mobile Applications ◽  
Video Recording ◽  
Structured Interview ◽  
Foreign Language Anxiety ◽  
Oral Performance ◽  
Speaking Anxiety ◽  
The Past ◽  
The Impact

Foreign language anxiety (FLA) has a debilitating influence on the oral performance of EFL speakers. Over the past decade, most research in MALL has emphasized the use of mobile applications on improving language skills, but little research has explored the impact of using video recording tool to decrease foreign language speaking anxiety (FLSA). Hence, this study examines the effect of using video recording tool on students' EFL speaking anxiety. Twenty-eight pre-intermediate freshmen at Van Lang University, Vietnam, participated in a seven-week project. In this research, mixed method was used in combination with three data collection instruments: questionnaire, observation notes, semi-structured interview. The results indicated that video recording tool significantly lowers EFL speaking anxiety. Therefore, this study makes a major contribution to research on FLA by exploring freshmen's anxiety causes and its impacts on learners' oral performance and offering a technique to help them overcome that phobia: mobile phone video recording.

scholarly journals Investigating the Path from Supply Chain Integration to Business Performance: Evidence from a Sub-Saharan African Economy

2016 ◽  
Vol 11 (6) ◽  
pp. 225 ◽  
Author(s):  
Jonathan Annan ◽  
Nathaniel Boso ◽  
Dominic Essuman
Keyword(s):  
Supply Chain ◽  
Life Cycle ◽  
Financial Performance ◽  
Value Creation ◽  
Coming Out ◽  
Product Life Cycle ◽  
Business Performance ◽  
Supply Chain Integration ◽  
Primary Data ◽  
The Impact

Following the growing concerns on the inconsistent findings in previous research and drawing on the social exchange and networking theories, this study re-examined the impact of supply chain integration (SCI) on business performance (i.e. value creation and financial performance). The study argues that the impact of SCI on financial performance is through value creation and is depended upon longevity of product life cycle. Using primary data from 79 firms in Ghana, the study finds that value creation is a short-run consequence of SCI while financial performance is a long-run outcome of SCI. Additionally, results show that the financial performance outcome of SCI is experienced more from integrative efforts than from the value creation outcome. Results further indicate that firms whose products stay relatively shorter on the market are more likely to experience lower positive impact of SCI on value creation, and thus firms’ ability to become proactive, monitor, and collect market information on product performance throughout its life cycle is key for coming out with strategies that will enable them maximize product’s life span so as to experience greater benefits that come with pursuing integration with other channel members.

scholarly journals The Influence of Communicative Relations on Facial Responses to Pain: Does It Matter Who Is Watching?

2014 ◽  
Vol 19 (1) ◽  
pp. 15-22 ◽  
Author(s):  
Anna J Karmann ◽  
Stefan Lautenbacher ◽  
Florian Bauer ◽  
Miriam Kunz
Keyword(s):  
Facial Pain ◽  
Pain Catastrophizing ◽  
Video Recording ◽  
Heat Pain ◽  
Social Situations ◽  
Situational Demands ◽  
Facial Expressiveness ◽  
The Impact ◽  
The Relationship ◽  
Healthy Participants

BACKGROUND: Facial responses to pain are believed to be an act of communication and, as such, are likely to be affected by the relationship between sender and receiver.OBJECTIVES: To investigate this effect by examining the impact that variations in communicative relations (from being alone to being with an intimate other) have on the elements of the facial language used to communicate pain (types of facial responses), and on the degree of facial expressiveness.METHODS: Facial responses of 126 healthy participants to phasic heat pain were assessed in three different social situations: alone, but aware of video recording; in the presence of an experimenter; and in the presence of an intimate other. Furthermore, pain catastrophizing and sex (of participant and experimenter) were considered as additional influences.RESULTS: Whereas similar types of facial responses were elicited independent of the relationship between sender and observer, the degree of facial expressiveness varied significantly, with increased expressiveness occurring in the presence of the partner. Interestingly, being with an experimenter decreased facial expressiveness only in women. Pain catastrophizing and the sex of the experimenter exhibited no substantial influence on facial responses.CONCLUSION: Variations in communicative relations had no effect on the elements of the facial pain language. The degree of facial expressiveness, however, was adapted to the relationship between sender and observer. Individuals suppressed their facial communication of pain toward unfamiliar persons, whereas they overtly displayed it in the presence of an intimate other. Furthermore, when confronted with an unfamiliar person, different situational demands appeared to apply for both sexes.

scholarly journals Can trophic rewilding reduce the impact of fire in a more flammable world?

2018 ◽  
Vol 373 (1761) ◽  
pp. 20170443 ◽  
Author(s):  
Christopher N. Johnson ◽  
Lynda D. Prior ◽  
Sally Archibald ◽  
Helen M. Poulos ◽  
Andrew M. Barton ◽  
...  
Keyword(s):  
Fire Regimes ◽  
Ground Vegetation ◽  
Litter Layer ◽  
Theme Issue ◽  
Large Herbivores ◽  
Plant Matter ◽  
The World ◽  
Large Animals ◽  
In Fire ◽  
The Impact

Large vertebrates affect fire regimes in several ways: by consuming plant matter that would otherwise accumulate as fuel; by controlling and varying the density of vegetation; and by engineering the soil and litter layer. These processes can regulate the frequency, intensity and extent of fire. The evidence for these effects is strongest in environments with intermediate rainfall, warm temperatures and graminoid-dominated ground vegetation. Probably, extinction of Quaternary megafauna triggered increased biomass burning in many such environments. Recent and continuing declines of large vertebrates are likely to be significant contributors to changes in fire regimes and vegetation that are currently being experienced in many parts of the world. To date, rewilding projects that aim to restore large herbivores have paid little attention to the value of large animals in moderating fire regimes. Rewilding potentially offers a powerful tool for managing the risks of wildfire and its impacts on natural and human values. This article is part of the theme issue ‘Trophic rewilding: consequences for ecosystems under global change’.

scholarly journals Reconstructing burnt area during the Holocene: an Iberian case study

2021 ◽  
Author(s):  
Yicheng Shen ◽  
Luke Sweeney ◽  
Mengmeng Liu ◽  
Jose Antonio Lopez Saez ◽  
Sebastián Pérez-Díaz ◽  
...  
Keyword(s):  
Fire Regimes ◽  
Weighted Averaging ◽  
Pollen Data ◽  
Burnt Area ◽  
The Holocene ◽  
Quantitative Estimates ◽  
In Fire ◽  
The Impact ◽  
Pollen Records

Abstract. Charcoal accumulated in lake, bog or other anoxic sediments through time has been used to document the geographical patterns in changes in fire regimes. Such reconstructions are useful to explore the impact of climate and vegetation changes on fire during periods when the human influence was less prevalent than today. However, charcoal records only provide semi-quantitative estimates of change in biomass burning. Here we derive quantitative estimates of burnt area from vegetation data in two stages. First, we relate the modern charcoal abundance to burnt area using a conversion factor derived from a generalized linear model of burnt area probability based on eight environmental predictors. Then, we establish the relationship between fossil pollen assemblages and burnt area using Tolerance-weighted Weighted Averaging Partial Least-Squares with sampling frequency correction (fxTWA-PLS). We test this approach using the Iberian Peninsula as a case study because it is a fire-prone region with abundant pollen and charcoal records covering the Holocene. We derive the vegetation-burnt area relationship using the 29 records that have both modern and fossil charcoal and pollen data, and then reconstruct palaeo-burnt area for the 114 records with Holocene pollen records. The pollen data predict charcoal abundances through time relatively well (R2 = 0.47) and the changes in reconstructed burnt area are synchronous with known climate changes through the Holocene. This new method opens up the possibility of reconstructing changes in fire regimes quantitatively from pollen records, which are far more numerous than charcoal records.

scholarly journals Investigation of the influence of recyclate content on Poisson number of composites

2021 ◽  
Vol 28 (1) ◽  
pp. 668-675
Author(s):  
Daria Żuk ◽  
Norbert Abramczyk ◽  
Sebastian Drewing
Keyword(s):  
Testing Machine ◽  
Solid Material ◽  
Measuring System ◽  
Variable Load ◽  
Low Weight ◽  
Mechanical And Physical Properties ◽  
Static Tensile ◽  
Composite Production ◽  
The Impact ◽  
Made In

Abstract Composite materials are used in many industries. Their mechanical and physical properties as well as their low weight make them suitable for use in many constructions. Their wide application generates a problem with their disposal. Therefore, it is necessary to design new materials based on waste from polyester–glass laminates in order to introduce a closed circuit in the composite production process. The article presents research aimed at determining solid material composites with polyester–glass recyclate, in order to use these materials for modeling the structure. The aim of this study was to determine the effect of the addition of recyclate to the polyester–glass composite on the deformation and the value of the Poisson number of the material. During the study, samples from composites with the addition of polyester–glass recyclate were used. Samples made in accordance with the standard for plastics PN-EN ISO 527-4_2000P were subjected to static tensile test on a universal testing machine, with variable load parameters. During the test, the longitudinal and transverse elongations of the samples were measured using a strain gauge measuring system. On the basis of the measurements, the values of Poisson numbers were determined, which allowed for a preliminary assessment of the impact of the recyclate content in the composite on its deformability.

scholarly journals Thermal Comfort Modeling of a Church Heated with Static Heaters

2019 ◽  
Vol 9 (1) ◽  
pp. 121-124
Author(s):  
Florin-Emilian Turcanu ◽  
Ana Diana Ancas ◽  
Mihai Profire ◽  
Marina Verdes ◽  
Marius Costel Balan
Keyword(s):  
Temperature Distribution ◽  
Thermal Comfort ◽  
Heating System ◽  
Xviii Century ◽  
Static Heating ◽  
The Impact ◽  
The Church

Abstract This paper evaluates a static heating system from a church. They are presented in almost every church. Temperature distribution in the church is done in 2d plane. The simulation is presented on a particular example, the Dormition of the Mother of God Church from Jassy, Romania. The heating system had been simulated in FLUENT and the consequences over the interior climate in the church are showed. An important issue is the impact of this system over the artwork, the church being rise in XVIII century.

Sign in / Sign up

Export Citation Format

Share Document