A new mobility model and its application in the channel holding time characterization in PCS networks

In this work, alumina (Al2O3) ceramics were prepared using an environmentally friendly slip casting method. To this end, highly concentrated (70 wt.%) aqueous suspensions of alumina (Al2O3) were prepared with different amounts of the ammonium salt of a polycarboxylic acid, Dolapix CE 64, as an electrosteric dispersant. The stability of highly concentrated Al2O3 aqueous suspensions was monitored by viscosity measurements. Green bodies (ceramics before sintering) were obtained by pouring the stable Al2O3 aqueous suspensions into dry porous plaster molds. The obtained Al2O3 ceramic green bodies were sintered in the electric furnace. Analysis of the effect of three sintering parameters (sintering temperature, heating rate and holding time) on the density of alumina ceramics was performed using the response surface methodology (RSM), based on experimental data obtained according to Box–Behnken experimental design, using the software Design-Expert. From the statistical analysis, linear and nonlinear models with added first-order interaction were developed for prediction and optimization of density-dependent variables: sintering temperature, heating rate and holding time.

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A Prediction-Based Spectrum Allocation Algorithm for Highway Mobility Model in Cognitive Radio Networks

2020 IEEE 9th Joint International Information Technology and Artificial Intelligence Conference (ITAIC) ◽

10.1109/itaic49862.2020.9338851 ◽

2020 ◽

Author(s):

Yao Wang ◽

Yi Zhang ◽

Jiamei Chen ◽

Bin Zhao ◽

Chao Gao ◽

...

Keyword(s):

Cognitive Radio ◽

Cognitive Radio Networks ◽

Mobility Model ◽

Radio Networks ◽

Spectrum Allocation ◽

Allocation Algorithm

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A Response Surface Methodology (RSM) Approach for Optimizing the Attenuation of Human IgE-Reactivity to β-Lactoglobulin (β-Lg) by Hydrostatic High Pressure Processing

Foods ◽

10.3390/foods10081741 ◽

2021 ◽

Vol 10 (8) ◽

pp. 1741

Author(s):

Xin Sun ◽

Jialing Vivien Chua ◽

Quynh Anh Le ◽

Francisco Trujillo ◽

Mi-Hwa Oh ◽

...

Keyword(s):

Response Surface Methodology ◽

Optimal Condition ◽

Response Surface ◽

High Pressure Processing ◽

Molecular Structures ◽

Holding Time ◽

P Value ◽

Molecular Change ◽

Ige Reactivity ◽

Β Lactoglobulin

The response surface methodology (RSM) and central composite design (CCD) technique were used to optimize the three key process parameters (i.e., pressure, temperature and holding time) of the high-hydrostatic-pressure (HHP) processing either standalone or combined with moderate thermal processing to modulate molecular structures of β-lactoglobulin (β-Lg) and α-lactalbumin (α-La) with reduced human IgE-reactivity. The RSM model derived for HHP-induced molecular changes of β-Lg determined immunochemically showed that temperature (temp), pressure (p2) and the interaction between temperature and time (t) had statistically significant effects (p < 0.05). The optimal condition defined as minimum (β-Lg specific) IgG-binding derived from the model was 505 MPa at 56 °C with a holding time of 102 min (R2 of 0.81 and p-value of 0.01). The validation carried at the optimal condition and its surrounding region showed that the model to be underestimating the β-Lg structure modification. The molecular change of β-Lg was directly correlated with HHP-induced dimerization in this study, which followed a quadratic equation. The β-Lg dimers also resulted in the undetectable human IgE-binding.

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Opportunistic Network Algorithms for Internet Traffic Offloading in Music Festival Scenarios

Sensors ◽

10.3390/s21103315 ◽

2021 ◽

Vol 21 (10) ◽

pp. 3315

Author(s):

Aida-Ștefania Manole ◽

Radu-Ioan Ciobanu ◽

Ciprian Dobre ◽

Raluca Purnichescu-Purtan

Keyword(s):

High Performance ◽

Geographical Area ◽

Mobility Model ◽

Routing Algorithms ◽

Message Delivery ◽

Opportunistic Network ◽

Key Factors ◽

Network Algorithms ◽

Music Festival ◽

Social Metrics

Constant Internet connectivity has become a necessity in our lives. Hence, music festival organizers allocate part of their budget for temporary Wi-Fi equipment in order to sustain the high network traffic generated in such a small geographical area, but this naturally leads to high costs that need to be decreased. Thus, in this paper, we propose a solution that can help offload some of that traffic to an opportunistic network created with the attendees’ smartphones, therefore minimizing the costs of the temporary network infrastructure. Using a music festival-based mobility model that we propose and analyze, we introduce two routing algorithms which can enable end-to-end message delivery between participants. The key factors for high performance are social metrics and limiting the number of message copies at any given time. We show that the proposed solutions are able to offer high delivery rates and low delivery delays for various scenarios at a music festival.

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