NiaCe/SiO2 catalysts were prepared by calcination under Ar, CO2, O2 and H2 ambience, and applied in CO2 reforming of methane for synthesis gas production. BET, XRD, XPS, TPR, SEM, TEM and TPH ...techniques were employed to characterize the fresh and used catalysts. Highly dispersed nickel oxides bearing stronger interaction with SiO2 prevented the metal sintering. The formation of reactive carbon species on NiaCe/SiO2 catalyst calcined under Ar ambience effectively promoted the carbon elimination and kept the catalyst more stable. Nevertheless, the oxygen storage capacity of CeO2 might partly lose on NiaCe/SiO2 calcined under H2 ambience. As a result, the inhibition of carbon elimination and the deposition of inert carbon were responsible for its partial deactivation.
Purpose: The main reason behind carrying out this research is to explain the current position of Pakistan’s automobile industry, what the customer expectations are and what they are doing to achieve ...quality standards and to meet the expectations of the customer and fulfill their satisfaction.The combination of questions addressed in this research has not been worked upon before(Adeel, 2019)
Design/Methodology/Approach: As per the nature of this study, non-random sampling techniques used to collect the data. The sample size for current study was 231 customers of local and important vehicles as participants selected. To test the proposed model, a structured questionnaire was used to collect the data.
Findings: Results that arise in quantitative data show customer satisfaction towards internal features of vehicles and successfully identify what factors having the highest impact on customer satisfaction are feeling, interior refinement, safety and ambient light
Implications/Originality/Value: This will aid car manufacturers to do better market segmentation to target customers living in different cities of Pakistan as well as aid car dealers to know their customer needs regarding car. Moreover, when bigger sample size is used results may be differ from our results as more people will be engaged in survey from all over Pakistan that will help future researchers to know psychographic of people living in non-identical places of Pakistan.
Y3Al5O12:Ce3+ (YAG:Ce3+) transparent ceramic phosphors (TCPs) are regarded as the most promising luminescent converter for laser‐driven (LD) lighting. High‐quality YAG:Ce3+ TCPs are still urgent for ...high efficiency LD lighting devices. YAG:Ce3+ TCPs in a vacuum ambience by using nano‐sized raw materials are prepared. Controlling defects by adding nano‐sized MgO and SiO2 simultaneously enables a high transmittance nearly 80%. After annealing in air furthermore, the luminous efficiency is enhanced greatly from 106 to 223 lm W−1, which is the best result reported now for LD lighting. These results demonstrate that the optimizing YAG:Ce3+ TCPs in a fitting strategy will brighten once again in the next‐generation LD lighting. Based on scanning electron microscopy (SEM) coupled with a cathodoluminescence system, defects and Ce3+ distributions in grains are identified directly for the first time.
Controlling defects by adding nano‐sized MgO and SiO2 enables a high transmittance of nearly 80%. After annealing in air, furthermore, the luminous efficiency is enhanced greatly from 106 to 223 lm W−1. These results demonstrate that the optimization of Y3Al5O12:Ce3+ transparent ceramic phosphors in a fitting strategy will brighten once again the next generation of laser‐driven lighting.
Atmospheres are everywhere: at the workplace, in the soccer stadium, in front of the crackling fireplace. They shape our everyday language and have become quite natural expressions of how we find ...ourselves in certain environments and how we feel about them. Their influence is far-reaching: aesthetic atmospheres are closely linked to a contemporary experience-oriented historical culture whose products and practices claim to establish an immediate contact with the past. With ›Vergangenheitsatmosphären‹ Felix Zimmermann offers for the first time a term to adequately describe this striving for immediacy. By means of in-depth analyses of the digital games »Anno 1800« (2019), »Assassin's Creed Syndicate« (2015), and »Dishonored: The Mask of Wrath« (2012), the term is contoured and the productivity of atmospheric research trained on theories and methods of public history, game studies, and phenomenology is demonstrated.
This article appraises a theoretical model that relates personality, satisfaction, loyalty, ambience, and image in a hotel setting. The results of the structural equation modeling indicated that ...extraversion, agreeableness, and neuroticism among the Big Five Personality Factors significantly affect satisfaction. Satisfaction had a significant impact on hotel image and guests’ loyalty. Compared to satisfaction, hotel image had a lesser impact on loyalty as well as being a mediator for the impact of satisfaction on loyalty. The moderating role of hotel ambience in the proposed theoretical framework was also identified. The results offer hoteliers potential strategies/tactics for loyalty enhancement.
•Signals which overlaps in both time and frequency domain, are very difficult to separate out without distortion.•In multimedia content making, sound plays a vital role.•Deep Neural Networks ...(DNN)have been used to handle the full separation of overlapping sources.•DNNs for audio signal separation depends on factors such as the quality, size of the training data, architecture of the network, and the specific task at hand.
Separating the signals from the mixture when the signals share same frequency and time domain pattern is always a matter of concern. In natural environment, sound events often appear simultaneously, increasing the complexity. Movie making and audio-visual content creation is an industry which covers a huge share of our economy. With the advancement of technology, it becomes important to give audience more realistic experience. But sometimes due to certain environmental conditions, recording devices capture sound signals which overlap with the character voice of the script or required ambience sound either in frequency domain or time domain or in both. To fix the problem, sound engineers mostly dub the sound in the studio and try to collect the ambience sound later on. Further mixing is done during post processing of sound. Although different software tools are available in market, but here aesthetic value and originality of the sound has been compromised. Because, it is very hard to get the exact voice parameters and same ambience in studio environment. This paper gives an overview of different approaches to deal with the overlapping sound by focussing the recently reported literature and highlights the key attributes which are catalysing the evolving scenario.
•Personal Comfort Systems (PCS) provide thermal comfort at an individual level.•PCS operate on heating, cooling, ventilation and combination modes.•Conventionally, PCS need less than half the energy ...required for HVAC operation.•This review discusses the results of over 150 published studies on PCS.
Conventional heating, ventilation, and air-conditioning (HVAC) systems are designed to condition the entire building volume. In contrast, Personal Comfort Systems (PCS) target conditioning only the occupied zones of the space, while maintaining the remaining volume at a relatively under-conditioned state. PCS offer the occupants the choice of modulating their immediate thermal ambience with local controls. The individual-level control helps in improving the subjective thermal and air quality acceptability with the desired thermal sensation. This review paper details on the various types of heating, cooling, ventilation, heating with ventilation, and cooling with ventilation PCS devices. It summarises the thermal ambience created by the respective PCS devices and the resultant subjective responses of the occupants. This review also identifies the energy saving potential of various kinds of PCS devices, the power use of PCS devices, and discusses their economic viability.
A green and facile protocol of thermal treatment of graphene oxide (GO) with urea was adopted to synthesize nitrogen-doped graphene (NG-Urea-air) at a low temperature (350 °C) in the static air. The ...resulting sample exhibited outstanding catalytic performance to activate peroxymonosulfate (PMS) toward organic degradation. The NG-Urea-air induced 49.7- and 11.5-fold enhancement over GO and pristine reduced graphene oxide (rGO-air). Moreover, the influences of nitrogen precursors including organic chemicals (urea, cyanamide, and melamine) and inorganic salts (ammonium nitrate and ammonium chloride) were investigated, and urea was demonstrated to be the best precursor for synthesizing N-doped graphene with a relative high doping level (18.7 at.%). The classical radical quenching and advanced in situ electron paramagnetic resonance (EPR) technology revealed that the outstanding oxidative effectiveness of PMS/NG-Urea-air system was originated from the nonradical oxidation pathway, in which PMS was activated by the positively charged carbon domains next to nitrogen atoms and the phenol was oxidized simultaneously on the carbon network via rapid charge transfer. Meanwhile, singlet oxygen and radicals may also partially contribute to the complete phenol degradation. This study facilitates a fundamental investigation of heteroatom doping progress during thermal treatment and sheds light on the insights into carbocatalysis in environmental remediation.
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