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A modified model of the willingness to pay for functional foods

Sándor Kovács Zoltán Szakály Károly Pető Péter Huszka Marietta Kiss

Publication Name: Appetite

Publication Date: 2019-07-01

Volume: 138

Issue: Unknown

Page Range: 94-101

Description:

The aim of this research was to develop a modified version of the Munene model summarizing the factors influencing willingness to pay for functional foods, adjusted to the Hungarian population. The questionnaire survey was conducted in 2014 in Hungary on a sample of 500 individuals, representative for gender, age, settlement type and region. Building blocks of the Munene model were examined and tested with a Latent Variable Path Analysis with the Partial Least Squares (LVPLS) model. According to the results, the strongest relationship in the modified model was identified between attitudes towards, and beliefs about, the attributes of functional foods, i.e. the more consumers believe in the health protecting effect of functional foods, the more positive their attitudes towards those foods, and the more they are willing to pay a premium for them. The highest explanatory power in the model was attributed to the attitudes towards functional foods, followed by beliefs about the attributes of functional foods, and then by consumer demographics. The modification of the original Munene model based on a Hungarian sample contributes to an examination of its usability and provides an example of how it can fit to another culture. Moreover, a comprehensive model including factors influencing WTP has not yet been developed among Hungarian consumers.

Open Access: Yes

DOI: 10.1016/j.appet.2019.03.020

Evaluation of layer 3 multipath solutions using container technologies

Akos Kovacs Gábor Lencse

Publication Name: 2019 42nd International Conference on Telecommunications and Signal Processing Tsp 2019

Publication Date: 2019-07-01

Volume: Unknown

Issue: Unknown

Page Range: 207-211

Description:

The MPT network layer multipath communication library is capable of using multiple communication channels by creating an UDP tunnel over them. The contemporary version of MPT uses the GRE tunnel protocol. MPTCP is another multipath solution, which uses TCP subflows on kernel level to ensure multipath communication. In this paper, we are using multiple container technologies to install these multipath communication solutions. Most common Docker container and a HPC specific Singularity container interconnected with twelve 100Mbit/s links were used to evaluate the aggregation capabilities of the combination of these technologies.

Open Access: Yes

DOI: 10.1109/TSP.2019.8768820

Enhanced separation of maximum boiling azeotropic mixtures with extractive heterogeneous-azeotropic distillation

Andras Jozsef Toth Eniko Haaz Szabolcs Solti J. Nagy Tibor Nagy Botond Szilagyi Peter Mizsey Agnes Szanyi

Publication Name: Chemical Engineering Research and Design

Publication Date: 2019-07-01

Volume: 147

Issue: Unknown

Page Range: 55-62

Description:

In the separation industry the extractive heterogeneous-azeotropic distillation (EHAD) is a new and powerful innovation, that is capable of making the separation of highly non-ideal mixtures feasible and economical. In the last years there has been much attention paid to the separation of the minimum boiling homogeneous azeotropes. Although maximum boiling azeotropes are fewer in numbers than the minimum boiling ones but their separation is more complicated but it could be solved with the EHAD, too. Since EHAD is not limited to the separation of minimum boiling azeotropes, the separation of the maximum boiling azeotropes is studied in this work. Our work is motivated by industrial problems because there are such maximum boiling azeotropes in the liquid wastes of the fine chemical industry. The separation of highly non-ideal Water–Acetone–Chloroform–Methanol and Water–Ethyl Acetate–Chloroform–Ethanol quaternary mixtures are investigated and optimized in professional flowsheet simulator environment. Total Annual Costs are also determined. The purity requirement is 99.5 m/m% for Chloroform and the bottom product should be as clear as possible in water so that less liquid organic waste has to be incinerated. It is also an important merit of the EHAD that the chemicals in the distillate can be usually reused supporting sustainability. Different solutions for the separations supplemented with heat integration are examined. On the basis of the computer simulations and the experimental verification it can be concluded, the first time on the literature, that the separation efficiency of EHAD is superior also for the separation of the maximum boiling azeotrope mixtures.

Open Access: Yes

DOI: 10.1016/j.cherd.2019.05.002

Leveraging the Internet of Things and blockchain technology in Supply Chain Management

Horst Treiblmaier John G. Keogh Abderahman Rejeb

Publication Name: Future Internet

Publication Date: 2019-07-01

Volume: 11

Issue: 7

Page Range: Unknown

Description:

Modern supply chains have evolved into highly complex value networks and turned into a vital source of competitive advantage. However, it has become increasingly challenging to verify the source of raw materials and maintain visibility of products and merchandise while they are moving through the value chain network. The application of the Internet of Things (IoT) can help companies to observe, track, and monitor products, activities, and processes within their respective value chain networks. Other applications of IoT include product monitoring to optimize operations in warehousing, manufacturing, and transportation. In combination with IoT, Blockchain technology can enable a broad range of different application scenarios to enhance value chain transparency and to increase B2B trust. When combined, IoT and Blockchain technology have the potential to increase the effectiveness and efficiency of modern supply chains. The contribution of this paper is twofold. First, we illustrate how the deployment of Blockchain technology in combination with IoT infrastructure can streamline and benefit modern supply chains and enhance value chain networks. Second, we derive six research propositions outlining how Blockchain technology can impact key features of the IoT (i.e., scalability, security, immutability and auditing, information flows, traceability and interoperability, quality) and thus lay the foundation for future research projects.

Open Access: Yes

DOI: 10.3390/fi11070161

Characterization of edge and scrape-off layer fluctuations using the fast Li-BES system on COMPASS

M. Berta P. Hacek J. Krbec M. Szutyányi A. Buzás A. Bencze

Publication Name: Plasma Physics and Controlled Fusion

Publication Date: 2019-06-21

Volume: 61

Issue: 8

Page Range: Unknown

Description:

Recently the Lithium-Beam Emission Spectroscopy (Li-BES) system on COMPASS has reached its full diagnostic power in terms of routine automatic operation in any kind of plasma scenarios and it is normally used as a standard tool for reconstruction of ultra fast density profiles in the edge region of COMPASS plasmas. The purpose of this study is to investigate the advantages and limitations of the COMPASS Li-BES system in characterizing plasma electron density fluctuations. We show how the atomic physics of plasma-beam interactions can affect the interpretation of the measurement at different radial positions and for different electron density profiles. We also demonstrate the usability of generalized sequential probability ratio test for automatic event detection. Using non-perturbative diagnostic, we verify the validity of the stochastic Garcia-model for scrape-off layer filaments and accompanying holes (density deficits).

Open Access: Yes

DOI: 10.1088/1361-6587/ab24a0

Optimal protocols for quantum quenches of finite duration in the Luttinger model

Masudul Haque Ádám Bácsi Balázs Dóra Balázs Dóra

Publication Name: Physical Review B

Publication Date: 2019-06-06

Volume: 99

Issue: 24

Page Range: Unknown

Description:

Reaching a target quantum state from an initial state within a finite temporal window is a challenging problem due to nonadiabaticity. We study the optimal protocol for switching on interactions to reach the ground state of a weakly interacting Luttinger liquid within a finite time τ, starting from the noninteracting ground state. The protocol is optimized by minimizing the excess energy at the end of the quench, or by maximizing the overlap with the interacting ground state. We find that the optimal protocol is symmetric with respect to τ/2, and can be expressed as a functional of the occupation numbers of the bosonic modes in the final state. For short quench durations, the optimal protocol exhibits fast oscillation and excites high-energy modes. In the limit of large τ, minimizing energy requires a smooth protocol while maximizing overlap requires a linear quench protocol. In this limit, the minimal energy and maximal overlap are both universal functions of the system size and the duration of the protocol.

Open Access: Yes

DOI: 10.1103/PhysRevB.99.245110

Modeling of Fuzzy Rule-base Algorithm for the Time Dependent Traveling Salesman Problem

Peter Foldesi Boldizsar Tuu-Szabo Ruba Almahasneh L. T. Kóczy

Publication Name: IEEE International Conference on Fuzzy Systems

Publication Date: 2019-06-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

The Traveling Salesman Problem (TSP) is one of the most extensively studied NP-hard graph search problems. In the literature, there have been numerous published attempts, applying various approaches in order to find the optimum (least cost) or semi optimum solution. Time Dependent Traveling Salesman Problem (TD TSP) is one of the most sufficient extensions and modifications of the original TSP problem. In TD TSP the costs of edges between nodes varies, they are assigned higher cost in the traffic jam region, such as city center or during the rush hour periods. In this paper, we introduce an even more realistic approach, the 3FTD TSP (Triple Fuzzy Time Dependent Traveling Salesman Problem); a fuzzified model of the original TD TSP. The 3FTD TSP presents a variation of the TD TSP utilizing fuzzy values in the cost between two nodes (shops, cities, etc.), the geographical areas of the traffic jam region, and also the rush hour period. The goal is to give a practically useful and realistic alternative of the basic TD TSP problem. In order to calculate the (quasi-) optimum solution, the Discrete Bacterial Memetic Evolutionary Algorithm was used, since it has been proven to be rather efficient (and predictably) in a wide range of NP-hard problems, including the original TSP and the TD TSP as well. The results from the runs based on the extensions of the family of benchmarks generated from the original TD TSP benchmark data set showed rather good and credible initial results.

Open Access: Yes

DOI: 10.1109/FUZZ-IEEE.2019.8858853

A multi-level technique for the Method of Fundamental Solutions without regularization and desingularization

Csaba Gáspár

Publication Name: Engineering Analysis with Boundary Elements

Publication Date: 2019-06-01

Volume: 103

Issue: Unknown

Page Range: 145-159

Description:

The traditional Method of Fundamental Solutions is revisited, based on a special strategy of defining the external source points. Unlike the classical Method of Fundamental Solutions, the sources are categorized into groups; the density of the spatial distribution of the sources decreases rapidly far from the boundary. On each group, the original problem is discretized using the same set of boundary collocation points. Such groups of sources are constructed in a fully automated way by the quadtree/octtree algorithm. The discretized problems are solved in the sense of least squares. A simple multi-level method is built up, using the (conjugate) gradient iteration as a smoothing procedure. The resulting method significantly reduces the computational complexity. Moreover, the problem of evaluation singular integrals as well as the problem of severely ill-conditioned matrices are avoided. The method is generalized to 3D axisymmetric potential problems as well.

Open Access: Yes

DOI: 10.1016/j.enganabound.2019.03.006

Studying growth characteristics of yeast strains on vegetal fermentation media and with vitamin supplementation

Balázs Ásványi Judit Molnár

Publication Name: Acta Alimentaria

Publication Date: 2019-06-01

Volume: 48

Issue: 2

Page Range: 143-149

Description:

The primary purpose of these researches was to optimize single-cell protein (SCP) production process using Saccharomyces cerevisiae NCAIM Y.00200 and Kluyveromyces marxianus DSM 4908 strain, and then to analyse the changes in yield of single-cell protein fi nal product using vitamin supplementation. To determine these values, the total sugar content of the fermentation medium, and the protein content of the yeast was determined. During our work, a particular attention was paid to the change of sugar content and yeast protein quantity. Besides, yield (Yx/s) values, typical of the whole fermentation, were also measured. Protein yield, as the final product of fermentation, featured the effi ciency of our work. The results of our optimized trial settings that were considered as control, using S. cerevisiae NCAIM Y.00200 and K. marxianus DSM 4908 strains, were compared with the results of vitaminsupplemented fermentation processes. On this basis, we can say that during our trials vitamin supplementation did not influence the fi nal product yield of processes. The counted protein yields during fermentation were between 0.4-0.7 g g-1

Open Access: Yes

DOI: 10.1556/066.2019.48.2.1