scholarly journals Explosive Burning of a Mechanically Activated Al and CuO Thermite Mixture

Energies ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 489
Author(s):  
Alexander Dolgoborodov ◽  
Boris Yankovsky ◽  
Sergey Ananev ◽  
George Valyano ◽  
Galina Vakorina

The results of experiments to determine the role of structural schemes for the ignition of a mechanically activated thermite mixture Al–CuO and the formation of its combustion flame are presented. The reaction initiated in the bulk of the experimental assembly transforms into torch combustion in an open space. The dynamics of the volume of the flame reaction region was determined. The stage of flame formation has a stochastic character, determined by the random distribution of the reaction centres in the initial volume of the components. A high-speed camera, a pyrometer and electro contact sensors were used as diagnostic tools. The ultimate goal of the study was to optimize the conditions for the flame formation of this mixture for its effective use with a single ignition of various gas emissions.

Author(s):  
Arnold Waldberg ◽  
Sergej Safonov

The paper gives theoretic analysis and results of experimental investigation of suspended particle collecting in high‐speed fibrous mist collectors. A dominating role of inertial mechanism of suspended particle precipitation in highspeed mist collectors was determined and a method of calculation of their efficiency by means of probability integral was proposed. Applicability of physical analogy method to deduction of dependency determining values of d50 (diameter of particles collected in an apparatus under given technological mode of its operation with the efficiency of 50 %) on the basis of experimental data is shown. Experimental assembly used for research, testing techniques and result estimating methods are described. Investigation results allowed achieving an improved formula for calculating the value of d50 depending on hydraulic resistance of apparatus and density of collected particles.


TAPPI Journal ◽  
2009 ◽  
Vol 8 (1) ◽  
pp. 20-26 ◽  
Author(s):  
PEEYUSH TRIPATHI ◽  
MARGARET JOYCE ◽  
PAUL D. FLEMING ◽  
MASAHIRO SUGIHARA

Using an experimental design approach, researchers altered process parameters and material prop-erties to stabilize the curtain of a pilot curtain coater at high speeds. Part I of this paper identifies the four significant variables that influence curtain stability. The boundary layer air removal system was critical to the stability of the curtain and base sheet roughness was found to be very important. A shear thinning coating rheology and higher curtain heights improved the curtain stability at high speeds. The sizing of the base sheet affected coverage and cur-tain stability because of its effect on base sheet wettability. The role of surfactant was inconclusive. Part II of this paper will report on further optimization of curtain stability with these four variables using a D-optimal partial-facto-rial design.


Author(s):  
Rajbir Singh

Optical networks are bandwidth efficient networks are used for long haul communication providing seamless data transfer. For high speed data transmission in open space between different satellites, Inter-satellite Optical wireless communication (IsOWC) is widely used .In this paper we have evaluated the performance of IsOWC communication link for high speed data transmission .The performance of the system is evaluated on the basis of qualitative parameters such as Q-factor and BER using optisystem simulator.


Author(s):  
Nikolai Petrov ◽  
Nikolai Petrov ◽  
Inna Nikonorova ◽  
Inna Nikonorova ◽  
Vladimir Mashin ◽  
...  

High-speed railway "Moscow-Kazan" by the draft crosses the Volga (Kuibyshev reservoir) in Chuvashia region 500 m below the village of New Kushnikovo. The crossing plot is a right-bank landslide slope with a stepped surface. Its height is 80 m; the slope steepness -15-16o. The authors should assess the risk of landslides and recommend anti-landslide measures to ensure the safety of the future bridge. For this landslide factors have been analyzed, slope stability assessment has been performed and recommendations have been suggested. The role of the following factors have been analyzed: 1) hydrologic - erosion and abrasion reservoir and runoff role; 2) lithologyc (the presence of Urzhum and Northern Dvina horizons of plastically deformable rocks, displacement areas); 3) hydrogeological (the role of perched, ground and interstratal water); 4) geomorphological (presence of the elemental composition of sliding systems and their structure in the relief); 5) exogeodynamic (cycles and stages of landslide systems development, mechanisms and relationship between landslide tiers of different generations and blocks contained in tiers). As a result 6-7 computational models at each of the three engineering-geological sections were made. The stability was evaluated by the method “of the leaning slope”. It is proved that the slope is in a very stable state and requires the following measures: 1) unloading (truncation) of active heads blocks of landslide tiers) and the edge of the plateau, 2) regulation of the surface and groundwater flow, 3) concrete dam, if necessary.


Author(s):  
Mokal et

This chapter discusses the complementary tools and incentives that can be adopted by jurisdictions to ensure the proper and effective use of the Modular Approach and to give due regard to the position and role of the various types of stakeholders involved in a MSME insolvency process. It specifically focuses on the roles and obligations of the MSME entrepreneur, both at times approaching insolvency and during the MSME insolvency process. Entrepreneurs do not always possess the education and skills to monitor the financial situation of their business and to react accordingly. With regard to the MSME framework, they would usually not be capable of designing a proper continuation plan. They might not even be aware that there is a chance to turn their business around by using mechanisms under insolvency law. In all these areas, education is a useful remedy. Jurisdictions should establish a method for providing affordable educational counselling and legal advice.


2021 ◽  
Vol 25 ◽  
pp. 101170
Author(s):  
Mohd Fandi Al Khafiz Kamis ◽  
Mohd Naim Mohd Yaakob ◽  
Ezamin Abdul Rahim ◽  
Ahmad Sobri Muda ◽  
Mohamad Syafeeq Faeez Md Noh

2020 ◽  
Vol 131 ◽  
pp. 105336 ◽  
Author(s):  
Yinan Jiao ◽  
Yifan Zhang ◽  
Shiqing Ma ◽  
Deli Sang ◽  
Yang Zhang ◽  
...  

Life ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 593
Author(s):  
Srikanth Umakanthan ◽  
Maryann M Bukelo

Global genomic studies have detected the role of genomic alterations in the pathogenesis of Epstein–Barr virus (EBV)-associated tumors. EBV oncoproteins cause a vital shift of EBV from an infectious virus to an oncogenic form during the latent and lytic phase within the lymphoid B cells and epithelial cells. This epigenetic alteration modulates the virus and host genomes and inactivates and disrupts numerous tumor suppressors and signaling pathways. Genomic profiling has played the main role in identifying EBV cancer pathogenesis and its related targeted therapies. This article reviews the role of genetic changes in EBV-associated lymphomas and carcinomas. This includes the prolific molecular genesis, key diagnostic tools, and target-specific drugs that have been in recent clinical use.


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