•Explosion characteristics of hydrogen/air mixtures were studied.•Effects of initial turbulent intensity on explosion were studied.•Effects of equivalence ratio on turbulent explosion were ...studied.•Maximum pressure, explosion duration, fast explosion duration were analyzed.•Maximum rate of pressure rise, deflagration index, and heat loss were analyzed.
Explosion always occur in turbulent ambience, but few researches focusing on the effects of turbulence on explosion characteristics has been performed in the current. In the present investigation, the effects of initial turbulence on the explosion characteristics of stoichiometric and rich hydrogen-air mixtures were experimentally studied and analyzed on the basis of explosion pressure traces. Maximum explosion pressure, explosion duration, maximum rate of pressure rise, fast explosion duration, deflagration index, and the averaged heat flux through the wall during explosion were systematically examined. The results indicated that, turbulence will reduced the corresponding equivalence ratio to maximum rate of pressure rise but won’t change the corresponding equivalence ratios to maximum explosion pressure and two explosion durations. In turbulent ambience, two explosion durations will decline for the accelerated propagation of pressure wave, the values of maximum explosion pressure and maximum rate of pressure rise will be raised for the reduced heat flux through the vessel’s wall during explosion. In addition, turbulence raises the value of deflagration index, namely it raises the hazardous level.
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•Indium tin oxide nanotubes with different Sn doping concentrations were synthesized by electrospinning.•A specific response has been proposed to better characterize the sensing ...performances of gas sensors.•Facilitated transport channel for electrons can benefit the decrease in working temperatures.•Oxygen vacancies can mainly affect the sensitivity of gas sensor.
It’s demonstrated that the defects induced by doping can greatly influence the sensing properties of oxide-based gas sensors. In this work, the authors have designed indium tin oxide nanotubes (ITO NTs) with different Sn doping concentrations. Results showed that the walls of ITO NTs are comprised of the formed ITO and redundant In2O3 nanoparticles (NPs) at low doping concentration, and the doping-induced oxygen vacancies (Vo··S) can be tuned by Sn concentrations. Series of sensing tests to formaldehyde gas indicated that the ITO-7 NTs show the lowest working temperature (160 °C) and the highest specific response. Here, It is noted that to eliminate the influence of the coating amount of sensing performances, a concept of specific response was proposed i.e., Rair/(m–Rgas), where Rair and Rgas respectively stand for the resistances of gas sensors in the reference gas (in air this case) and in the test gas ambience, and m stands for the mass of the coated sensing materials. The decreased working temperature could be attributed to the formed In2O3 NPs/ITO tubular structure, and the enhanced specific response might be mainly associated with the Vo··S. Furthermore, a possible gas sensing enhancing mechanism via Vo··S for ITO-based gas sensors was proposed based on our results and analysis. This research would give some instructive advice to design high-performances oxide-based gas sensors via tuning the Vo··S.
Mental Health Atmospheres Video Games : New Directions in Game Research II Jimena Aguilar Rodríguez, Federico Alvarez Igarzábal, Michael S. Debus, Curtis L. Maughan, Su-Jin Song, Miruna Vozaru, Felix Zimmermann / Jimena Aguilar Rodríguez, Federico Alvarez Igarzábal, Michael S. Debus, Curtis L. Maughan, Su-Jin Song, Miruna Vozaru, Felix Zimmermann
10/2022, Letnik:
15
eBook
Odprti dostop
Gaming has never been disconnected from reality. When we engage with ever more lavish virtual worlds, something happens to us. The game imposes itself on us and influences how we feel about it, the ...world, and ourselves. How do games accomplish this and to what end? The contributors explore the video game as an atmospheric medium of hitherto unimagined potential. Is the medium too powerful, too influential? A danger to our mental health or an ally through even the darkest of times? This volume compiles papers from the Young Academics Workshop at the Clash of Realities conferences of 2019 and 2020 to provide answers to these questions.
This article aims at problematizing, from an aesthetic perspective, the contemporary “atmospheric turn”. From a confrontation between French impressionist painting and the painting of the Danish ...Vilhelm Hammershøi (1864-1916), we thus distinguish three concepts, which define three different aesthetic paths: — the ambience, appropriate to the Impressionists and the philosophies of the situation or, as we will say, of the surroundings; — the atmosphere, implied by the painting as it is thought by a certain French philosophy of the 20th century (Deleuze, Merleau-Ponty, Levinas); — finally, the silence, specific to Hammershøi’s painting. Could this silence, without ambiance or atmosphere, define an art of the common freed from the atmospheric turn?
Abstract
This study presents the new look on the dormitory's territory, which is located in Jedlikova 5, Kosice, Slovakia. Landscaping design has a significant impact on people, and touches both ...aesthetic and physical needs, environmental integrity of the area and has an impact on nature habitants. Good landscaping helps to provide a conducive living environment for students by creating needful places for recreation, physical education and studying, as well as producing the natural and healthy ambience to the surrounding by using green roofs, creating a pond for collection of rainwater and planting a lot of greenery. The study framework covers aspects, which are related to the ecological state of the territory, existing environmental problems, natural features and needs of the residents of the dormitory. The aim of the study is to create such a sustainable space, where both students and nature will be in harmony.
•Temperatures ranges for isothermal coal combustion in air and oxygen ambience estimated.•Coal particle size affects combustion process under different temperature regimes.•Product gas compositions ...varied during combustion and gasification stages.•Reactivity index differ based on particle sizes and reaction temperatures.•Higher reactivity potential observed for small particles from kinetic constants computation.
In this research, thermogravimetric and mass-spectrometric (TG-MS) analysis and kinetics of different sized (60μm, 800μm, and 3mm) Saray (Turkish origin) coal is examined at various combustion temperature ranges. Experiments are performed at the heating rate of 40°C/min in an argon atmosphere up to combustion/gasification temperatures (850–1150°C), which is close to the conditions of fluidized bed systems for high ash coal applications. The combustion tests are performed at isothermal conditions under air and oxygen ambience. The reaction regions, peak and burn-out temperatures, mass loss, maximum mass loss rate, and ash content of the different sized coal samples are evaluated. Reactivity index is also calculated to compare the reactivity of various sized coal samples. This research also focused on the main volatile products (H2, O2, CO, CH4, CO2) of different sized coal samples on the basis of both their relative intensities and on their relevancy. Activation energy and Arrhenius constant of the coal samples are calculated using volumetric, grain and the random pore models and the results are discussed. The volumetric model showed higher activation energy values as both in the case of air and oxygen gasification.
Perovskite quantum dots (PQDs) have attracted much attention in the field of photoelectrochemical (PEC) sensors owing to their superb optical properties and efficient charge transport, but the ...inherent poor stability severely hinders their PEC applications. Herein, hydrolysis‐resistant CsPbBr3/reduced graphene oxide nanoscrolls (CsPbBr3/rGO NSs) are obtained by solvent‐assisted self‐rolling process toward water‐stable PEC sensors. CsPbBr3 QDs embedded in rGO nanosheets can be prevented from water since the multilayer rGO shell layers, which maintains excellent optical properties. On account of strong interfacial interactions, rGO nanosheets are crimped spontaneously with CsPbBr3 QDs, which offer access to superb structural and long‐term storage stability. Moreover, appropriate band alignment and ultrafast interfacial carrier transfer enable CsPbBr3/rGO NSs to exhibit greatly enhanced anode photocurrent response for subsequent PEC sensing. As a demonstration, the molecular imprinted PEC sensors for two kinds of mycotoxins (aflatoxin B1 or ochratoxin A) presents an ultra‐high sensitivity and good anti‐interference ability. Significantly, this work provides an inspirable and convenient route for hydrolysis‐resistant PQDs‐based optoelectronic and photoelectrocatalytic applications in aqueous ambience.
Water‐stable CsPbBr3/reduced graphene oxide nanoscrolls (CsPbBr3/rGO NSs) are successfully achieved via rGO self‐rolling and CsPbBr3 encapsulation, appropriate band alignment and ultrafast interfacial carrier transfer enable CsPbBr3/rGO NSs to exhibit greatly enhanced anode photocurrent response for subsequent photoelectrochemical sensing. This work provides an inspirable and convenient strategy for hydrolysis‐resistant perovskite‐based further applications in aqueous ambience.
This study estimated the growth of body, carcass, primal cuts, edible offal, and feathers of Japanese quail reared in two thermal environments, receiving three nutritional plans, from one to 39 days ...of age. A total of 576 one-day-old female chicks (Coturnix japonica) with an average initial weight of 7.51±0.75g/bird were evaluated in a completely randomized design with a 3 × 2 factorial arrangement (three nutritional plans × two temperatures). The animals were housed in two climatic chambers, at 25 ºC and 35 ºC, using 12 replications with eight birds per experimental unit. Nutritional plans (NP) were as follows: NP1: one diet from 1-21days and another from 22-39 days; NP2: one diet from 1-14 days and another from 15-39 days; and NP3: a single diet from 1-39 days. The growth curves and growth rates of body, carcass, primal cuts, feathers, and edible offal were evaluated using the Gompertz mathematical model. Quail fed NP3 showed higher growth curves and rates for body, carcass, drumstick +thigh, and feather. There was an effect on maturity rate, which was lowest in quail housed at 35 ºC. Among the animals kept at 25 ºC, the group fed NP3 exhibited the highest growth rate and breast weight. The nutritional plan consisting of a single diet offered from 1 to 39 days, formulated based on the tables for Japanese and European quail, is the most suitable for estimating the growth curves (Gompertz model) of Japanese quail housed at 25 ºC or 35 ºC.
RESUMO: Objetivou-se estimar o crescimento corporal, carcaça, cortes nobres, vísceras comestíveis e penas de codornas japonesas criadas em dois ambientes térmicos e alimentadas com três planos nutricionais de um a 39 dias. Foram utilizadas 576 pintainhas (Coturnix japônica), fêmeas, com um dia de idade, com peso médio inicial 7,51 ± 0,75g/ave, distribuídas em delineamento inteiramente casualizado em esquema fatorial 3 × 2 (três planos nutricionais x duas temperaturas), alojadas em duas câmaras climáticas de 25º e 35 ºC, com 12 repetições e oito aves por unidade experimental. Os planos nutricionais foram: plano nutricional um (PN1) - uma dieta de 1-21 dias e uma dieta de 22-39 dias; plano nutricional dois (PN2) - uma dieta de 1-14 dias e uma dieta de 15-39 dias; e plano nutricional três (PN3) - dieta única de 1-39 dias. Foram avaliadas as curvas e taxas de crescimento corporal, carcaça, cortes nobres, penas e vísceras comestíveis, através do modelo matemático de Gompertz. Codornas alimentadas com PN3 apresentaram maiores curvas e taxas de crescimento corporal, de carcaça, coxa + sobrecoxa e penas. Houve efeito para taxa de maturidade, sendo inferior para codornas alojadas em 35 ºC. Nas aves mantidas em 25 ºC, observou-se maior taxa de crescimento e peso de peito nas codornas alimentadas com PN3. O plano nutricional composto por uma única dieta ofertada durante o período de um a 39 dias, formulado com base nas recomendações das tabelas para codornas japonesas e europeias, é o mais indicado para estimar curvas de crescimento no modelo de Gompertz de codornas japonesas alojadas em 25 ºC ou 35 ºC.
