scholarly journals APPLICATION OF VORTEX TECHNOLOGIES OF REFRACTORY COATING FORMATION FOR CONVERTER LINING. REPORT 2. FEATURES AND MOVEMENT PARAMETERS OF SLAG DROPS

2016 ◽  
Vol 58 (12) ◽  
pp. 896-900
Author(s):  
A. N. Kalinogorskii ◽  
E. V. Protopopov ◽  
A. G. Chernyatevich ◽  
S. V. Feiler ◽  
V. I. Bagryantsev
Keyword(s):  
Converter Lining ◽  
Refractory Coating ◽  
Coating Formation ◽  
Movement Parameters

scholarly journals APPLICATION OF VORTEX TECHNOLOGIES OF REFRACTORY COATING FORMATION FOR CONVERTER LINING. REPORT 1. FEATURES OF LIQUID SLAG CRUSHING AT BLOWING BY VORTEX TUYERE

2015 ◽  
Vol 58 (10) ◽  
pp. 756 ◽  
Author(s):  
A. N. Kalinogorskii ◽  
E. V. Protopopov ◽  
A. G. Chernyatevich ◽  
S. V. Feiler ◽  
V. I. Bagryantsev
Keyword(s):  
Liquid Slag ◽  
Converter Lining ◽  
Refractory Coating ◽  
Coating Formation

Analysis of movement of persons with disabilities during evacuation by lift

2020 ◽  
Vol 15 (1) ◽  
pp. 209-220
Author(s):  
Martin Szénay ◽  
Martin Lopušniak
Keyword(s):  
Computational Models ◽  
Persons With Disabilities ◽  
Entire Process ◽  
Injured Person ◽  
Impaired People ◽  
Movement Parameters ◽  
The Times ◽  
Mobility Impaired

Abstract Lifts are indispensable for the evacuation of mobility-impaired people from buildings in case of emergency. It is necessary to quantify the movement parameters of these people and describe the entire process using a suitable algorithm. The aim of the research was to quantify the times and speeds of movement for a person using a wheelchair and for an injured person. An experiment in situ was used. During the experiment, arrivals at the lift, cabin entries, and exits were monitored. The results include the times and speeds of a mobility-impaired person's movement. The experiments showed that a person using a wheelchair was slower than an injured person. The results can be used to expand computational models to account for the possibility of using lifts for evacuation.

scholarly journals Study and Use of Rice Husk Ash as a Source of Aluminosilicate in Refractory Coating

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3440
Author(s):  
Mohd Na’im Abdullah ◽  
Mazli Mustapha ◽  
Nabihah Sallih ◽  
Azlan Ahmad ◽  
Faizal Mustapha ◽  
...  
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Agricultural Waste ◽  
Fire Retardant ◽  
Sem Analysis ◽  
Refractory Coating ◽  
Alkyd Paint ◽  
Passive Fire Protection ◽  
In Fire ◽  
Geopolymer Binder

The utilisation of rice husk ash (RHA) as an aluminosilicate source in fire-resistant coating could reduce environmental pollution and can turn agricultural waste into industrial wealth. The overall objective of this research is to develop a rice-husk-ash-based geopolymer binder (GB) fire-retardant additive (FR) for alkyd paint. Response surface methodology (RSM) was used to design the experiments work, on the ratio of RHA-based GB to alkyd paint. The microstructure behaviour and material characterisation of the coating samples were studied through SEM analysis. The optimal RHA-based GB FR additive was formulated at 50% wt. FR and 82.628% wt. paint. This formulation showed the result of 270 s to reach 200 °C and 276 °C temperature at equilibrium for thermal properties. Furthermore, it was observed that the increased contents of RHA showed an increment in terms of the total and open porosities and rough surfaces, in which the number of pores on the coating surface plays an important role in the formation of the intumescent char layer. By developing the optimum RHA-based GB to paint formulation, the coating may potentially improve building fire safety through passive fire protection.

scholarly journals Plasma Electrolytic Oxidation (PEO) Process—Processing, Properties, and Applications

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1375
Author(s):  
Soumya Sikdar ◽  
Pramod V. Menezes ◽  
Raven Maccione ◽  
Timo Jacob ◽  
Pradeep L. Menezes
Keyword(s):  
Plasma Electrolytic Oxidation ◽  
Nanocomposite Coatings ◽  
Mechanical And Tribological Properties ◽  
Electrolytic Oxidation ◽  
Recent Developments ◽  
Coating Formation ◽  
Wear And Corrosion Resistance ◽  
Plasma Electrolytic ◽  
Peo Coatings ◽  
Future Work

Plasma electrolytic oxidation (PEO) is a novel surface treatment process to produce thick, dense metal oxide coatings, especially on light metals, primarily to improve their wear and corrosion resistance. The coating manufactured from the PEO process is relatively superior to normal anodic oxidation. It is widely employed in the fields of mechanical, petrochemical, and biomedical industries, to name a few. Several investigations have been carried out to study the coating performance developed through the PEO process in the past. This review attempts to summarize and explain some of the fundamental aspects of the PEO process, mechanism of coating formation, the processing conditions that impact the process, the main characteristics of the process, the microstructures evolved in the coating, the mechanical and tribological properties of the coating, and the influence of environmental conditions on the coating process. Recently, the PEO process has also been employed to produce nanocomposite coatings by incorporating nanoparticles in the electrolyte. This review also narrates some of the recent developments in the field of nanocomposite coatings with examples and their applications. Additionally, some of the applications of the PEO coatings have been demonstrated. Moreover, the significance of the PEO process, its current trends, and its scope of future work are highlighted.

Evaluation of electroacupuncture for symptom modification in a rodent model of spontaneous osteoarthritis

2021 ◽  
pp. 096452842110207
Author(s):  
Alexa P Spittler ◽  
Maryam F Afzali ◽  
Richard B Martinez ◽  
Lauren A Culver ◽  
Sarah E Leavell ◽  
...  
Keyword(s):  
Rodent Model ◽  
Knee Joints ◽  
Control Group ◽  
Disease Modification ◽  
Inflammatory Biomarker ◽  
Knee Oa ◽  
Significant Difference ◽  
Gene Transcripts ◽  
Restricted Mobility ◽  
Movement Parameters

Objective: Faced with the frustration of chronic discomfort and restricted mobility due to osteoarthritis (OA), many individuals have turned to acupuncture for relief. However, the efficacy of acupuncture for OA is uncertain, as much of the evidence is inconclusive. The purpose of this study was to evaluate electroacupuncture (EA) in a rodent model of OA such that conclusions regarding its effectiveness for symptom or disease modification could be drawn. Methods: Ten 12-month-old male Hartley guinea pigs—which characteristically have moderate to advanced OA at this age—were randomly assigned to receive EA for knee OA (n = 5) or anesthesia only (control group, n = 5). Treatments were performed three times weekly for 3 weeks, followed by euthanasia 2 weeks later. Gait analysis and enclosure monitoring were performed weekly to evaluate changes in movement. Serum was collected for inflammatory biomarker testing. Knee joints were collected for histology and gene expression. Results: Animals receiving EA had significantly greater changes in movement parameters compared to those receiving anesthesia only. There was a tendency toward decreased serum protein concentrations of complement component 3 (C3) in the EA group compared to the control group. Structural and antioxidant gene transcripts in articular cartilage were increased by EA. There was no significant difference in total joint histology scores between groups. Conclusion: This study provides evidence that EA has a positive effect on symptom, but not disease, modification in a rodent model of OA. Further investigations into mechanistic pathways that may explain the efficacy of EA in this animal model are needed.

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