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Simultaneity Analysis In A Wireless Sensor Network

Miodrag Malović Ljiljana Brajović Zoran Mišković Tomislav Šekara
Metrology and Measurement Systems | 2015 | vol. 22 | No 2 | 275-288 | DOI: 10.1515/mms-2015-0022
Keywords time frequency simultaneity synchronization temperature wireless sensor networks
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Abstract

An original wireless sensor network for vibration measurements was designed. Its primary purpose is modal analysis of vibrations of large structures. A number of experiments have been performed to evaluate the system, with special emphasis on the influence of different effects on simultaneity of data acquired from remote nodes, which is essential for modal analysis. One of the issues is that quartz crystal oscillators, which provide time reading on the devices, are optimized for use in the room temperature and exhibit significant frequency variations if operated outside the 20–30°C range. Although much research was performed to optimize algorithms of synchronization in wireless networks, the subject of temperature fluctuations was not investigated and discussed in proportion to its significance. This paper describes methods used to evaluate data simultaneity and some algorithms suitable for its improvement in small to intermediate size ad-hoc wireless sensor networks exposed to varying temperatures often present in on-site civil engineering measurements.
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Authors and Affiliations

Miodrag Malović
Ljiljana Brajović
Zoran Mišković
Tomislav Šekara

Valuation of mineral project with simultaneous options

Piotr Saługa
Gospodarka Surowcami Mineralnymi - Mineral Resources Management | 2011 | No 1 | 101-113
Keywords real options real options valuation simultaneous options
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Abstract

In the last decades Real Options Valuation (ROV) has been gaining a leading role among methods of economic evaluation and risk analysis of projects. This method enables valuation of managerial flexibility which includes postponing investments and reformulating of operating strategies of companies. By doing this, the method delivers higher project values than derived from the classical discount approaches, such as NPV. The value of flexibility may be of lower or greater importance - depending on types, configuration and sequence of occurring real options. Common methods of real options valuation are built on lattice models which approximate continuous stochastic process. One of the most popular techniques used for real options valuation - a marketed asset disclaimer approach (MAD) - is based on the binomial tree. The paper presents valuation of the mineral project with three simultaneous options: option-to-expand, option-to-contract and option-to-abandon.

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Authors and Affiliations

Piotr Saługa

Multiple emulsions for simultaneous active agents delivery in a skin topical application

Agnieszka Markowska-Radomska Ewa Dluska Agata Metera Maria Wojcieszak
Chemical and Process Engineering | 2021 | vol. 42 | No 3 | 263-273 | DOI: 10.24425/cpe.2021.138930
Keywords multiple emulsions antiseptic agent simultaneous release co-encapsulation
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Abstract

Most antiseptic agents are intended for use on intact skin, e.g. for hand hygiene or skin preparation before any medical procedure. This paper presents multiple emulsion-based antiseptic agents as formulations for application to body surfaces with modified release rates.
Multiple emulsions with a co-encapsulated antiseptic (phenyl salicylate – salol) and an agent preventing microorganism growth (benzoic acid) were formed in a Couette–Taylor flow apparatus. Results confirmed the possibility of the release kinetics modification while two compounds were encapsulated in the internal droplets of emulsions to control the release rates and time of the dose release. The addition of benzoic acid as a second active compound of the encapsulation process in the internal phase of double O1/W/O2 emulsion reduced the time necessary for the total release of salol triggering a two-step release.
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Bibliography

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Dluska E., Cui Z., Markowska-Radomska A., Metera A., Kosicki K., 2017a. Cryoprotection and banking of living cells in a 3D multiple emulsion-based carrier. Biotechnol. J., 12, 1600692. DOI: 10.1002/biot.201600692.
Dluska E., Hubacz R., Wronski S., Kamienski J., Dylag M., Wojtowicz R., 2007. The influence of helical flow on water fuel emulsion preparation. Chem. Eng. Commun., 194, 1271–1286. DOI: 10.1080/00986440701293959.
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Markowska-Radomska A., Dluska E., 2012. The multiple emulsion entrapping active agent produced via one-step preparation method in the liquid-liquid helical flow for drug release study and modelling, In: Starov V., Griffiths P. (Eds.), UK Colloids 2011. Progress in Colloid and Polymer Science, Vol 139. Springer, Berlin, Heidelberg, 29–34. DOI: 10.1007/978-3-642-28974-3_6.
Markowska-Radomska A., Dluska E., 2016. An evaluation of a mass transfer rate at the boundary of different release mechanisms in complex liquid dispersion. Chem. Eng. Process. Process Intensif., 101, 56–71. DOI: 10.1016/j.cep.2015.12.006.
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Purnamawati S., Indrastuti N., Danarti R., Saefudin T., 2017. The role of moisturizers in addressing various kinds of dermatitis: A review. Clin. Med. Res., 15, 75–87. DOI: 10.3121/cmr.2017.1363.
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Authors and Affiliations

Agnieszka Markowska-Radomska
1
ORCID: ORCID
Ewa Dluska
1
ORCID: ORCID
Agata Metera
1
Maria Wojcieszak
1
  1. Warsaw University of Technology, Faculty of Chemical and Process Engineering, Warynskiego 1, 00-645 Warsaw, Poland

Pragmatic equivalence as a challenge for interpreters of political discourse

Magdalena Bartłomiejczyk
LINGUISTICA SILESIANA | 2019 | vol. 40 | 385-408 | DOI: 10.24425/linsi.2019.129419
Keywords simultaneous interpreting European Parliament discourse analysis equivalence pragmatics
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Abstract

The article offers a discourse-analytic examination of original (English) and interpreted (Polish) versions of several extracts from plenary speeches by three Members of the European Parliament (Janusz Korwin-Mikke, Nigel Farage and Guy Verhofstadt). Controversial statements that have met with adverse reactions of the audience and/or the media are selected for analysis. The author endeavours to assess the degree to which pragmatic equivalence has been achieved by Polish interpreters. Another pertinent question is whether the identifi ed shifts are due to some systemic differences between the pragmatics of the source and target languages or to other factors, such as the constraints typical for simultaneous interpreting or specific, local problems.

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Authors and Affiliations

Magdalena Bartłomiejczyk

Simultaneous removal of phenol and Cu(II) from wastewater by tallow dihydroxyethyl betaine modified bentonite

Xiangyang Hu Bao Wang Gengsheng Yan Bizhou Ge
Archives of Environmental Protection | 2022 | 48 | 3 | 37-47 | DOI: 10.24425/aep.2022.142688
Keywords simultaneous adsorption; bentonite; tallow dihydroxyethyl betaine; Cu(II); phenol;
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Abstract

An organobentonite modified with an amphoteric surfactant, tallow dihydroxyethyl betaine (TDHEB), was used as an adsorbent to simultaneously remove Cu(II) and phenol from wastewater. The characteristic of the organobentonite (named TDHEB-bentonite) was analyzed by X-ray diffraction, Fourier-transform infrared spectra and nitrogen adsorption-desorption isotherm. Batch tests were conducted to evaluate the adsorption capacities of TDHEB-bentonite for the two contaminants. Experiment results demonstrated that the adsorption of both contaminants is highly pH-dependent under acidic conditions. TDHEB-bentonite had about 2.0 and 5.0 times higher adsorption capacity toward Cu(II) and phenol, respectively, relative to the corresponding raw Na-bentonite. Adsorption isotherm data showed that the adsorption processes of both contaminants were well described by Freundlich model. Kinetic experiment demonstrated that both contaminants adsorption processes correlated well with pseudo-second-order model. Cu(II) had a negative impact on phenol adsorption, but not vice versa. Cu(II) was removed mainly through chelating with the organic groups (-CH2CH2OH and -COO-) of TDHEB. Otherwise, partition into the organic phase derived from the adsorbed surfactant was the primarily mechanism for phenol removal. Overall, TDHEB-bentonite was a promising adsorbent for removing Cu(II) and phenol simultaneously from wastewater.
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Bibliography

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  45. Cao, L., Li, Z., Xiang, S., Huang, Z., Ruan, R. & Liu, Y. (2019). Preparation and characteristics of bentonite–zeolite adsorbent and its application in swine wastewater. Bioresource Technology, 284, pp. 448-455. DOI:10.1016/j.biortech.2019.03.043
  46. Chen, H., Zhou, W., Zhu, K., Zhan, H. & Jiang, M. (2004). Sorption of ionizable organic compounds on HDTMA-modified loess soil. Science of The Total Environment, 326(1), pp. 217-223. DOI:10.1016/j.scitotenv.2003.12.011
  47. Chen, Y., Zhang, X., Wang, L., Cheng, X. & Shang, Q. (2020). Rapid removal of phenol/antibiotics in water by Fe-(8-hydroxyquinoline-7-carboxylic)/TiO2 flower composite: Adsorption combined with photocatalysis. Chemical Engineering Journal, 402, 126260. DOI:10.1016/j.cej.2020.126260
  48. Chu, Y., Khan, M. A., Xia, M., Lei, W., Wang, F., Zhu, S. & Yan, X. (2020). Synthesis and micro-mechanistic studies of histidine modified montmorillonite for lead(II) and copper(II) adsorption from wastewater. Chemical Engineering Research and Design, 157, pp. 142-152. DOI:10.1016/j.cherd.2020.02.020
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  50. Fan, H., Zhou, L., Jiang, X., Huang, Q. & Lang, W. (2014). Adsorption of Cu2+ and methylene blue on dodecyl sulfobetaine surfactant-modified montmorillonite. Applied Clay Science, 95, pp. 150-158. DOI:10.1016/j.clay.2014.04.001
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Authors and Affiliations

Xiangyang Hu
1
Bao Wang
2
ORCID: ORCID
Gengsheng Yan
1
Bizhou Ge
2
  1. PowerChina Northwest Engineering Corporation Limited, China
  2. Xi’an University of Architecture and Technology, China

Wissensaktivierende Strategien im Simultandolmetschprozess. Ein Explikationsversuch

Anna Bajerowska
Kwartalnik Neofilologiczny | 2021 | No 4 | 505-514 | DOI: 10.24425/kn.2021.139556
Keywords conceptual compressions Theory of Conceptual Integration transcoding vertical translation simultaneous interpreting
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Abstract

This paper aims to investigate the role conceptual compressions play in the strategy of transcoding commonly applied in simultaneous interpreting. First, the most fundamental rules of the form-based transcoding and the meaning-based translation will be described. Second, the idea of conceptual compressions derived from the Conceptual Integration Theory will be discussed. As the last step, a specific pattern of conceptual compressions typical for the strategy of transcoding will be outlined.
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Authors and Affiliations

Anna Bajerowska
1
ORCID: ORCID
  1. Uniwersytet Warszawski

Homography augmented particle filter SLAM

Paweł Leszek Słowak Piotri Kaniewsk
Metrology and Measurement Systems | 2023 | vol. 30 | No 3 | 423-439 | DOI: 10.24425/mms.2023.146420
Keywords Simultaneous Localization and Mapping (SLAM) homography matrix particle filter robot navigation visual-inertial systems
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Abstract

The article presents a comprehensive study of a visual-inertial simultaneous localization and mapping (SLAM) algorithm designed for aerial vehicles. The goal of the research is to propose an improvement to the particle filter SLAM system that allows for more accurate and robust navigation of unknown environments. The authors introduce a modification that utilizes a homography matrix decomposition calculated from the camera frame-to-frame relationships. This procedure aims to refine the particle filter proposal distribution of the estimated robot state. In addition, the authors implement a mechanism of calculating a homography matrix from robot displacement, which is utilized to eliminate outliers in the frame-to-frame feature detection procedure. The algorithm is evaluated using simulation and real-world datasets, and the results show that the proposed improvements make the algorithm more accurate and robust. Specifically, the use of homography matrix decomposition allows the algorithm to be more efficient, with a smaller number of particles, without sacrificing accuracy. Furthermore, the incorporation of robot displacement information helps improve the accuracy of the feature detection procedure, leading to more reliable and consistent results. The article concludes with a discussion of the implemented and tested SLAM solution, highlighting its strengths and limitations. Overall, the proposed algorithm is a promising approach for achieving accurate and robust autonomous navigation of unknown environments.
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Authors and Affiliations

Paweł Leszek Słowak
1
Piotri Kaniewsk
1
  1. Military University of Technology, Faculty of Electronics, Gen. S. Kaliskiego 2, 00-908 Warsaw, Poland

The Performance of Max-GWMA Control Chart in the Presence of Measurement Errors

Saeid Sharafi Mohammad Reza Maleki Ali Salmasnia Reihaneh Mansoor
Management and Production Engineering Review | 2022 | vol. 13 | No 4 | 26-37 | DOI: 10.24425/mper.2022.142392
Keywords Max-GWMA Control Chart Average Run Length measurement errors Simultaneous Monitoring Multiple Measurements
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Abstract

Recently, simultaneous monitoring of process mean and variability has gained increasing attention. By departing from the accurate measurements assumption, this paper investigates the effect of gauge measurement errors on the performance of the maximum generally weighted moving average (Max-GWMA) chart for simultaneous monitoring of process mean and variability under an additive covariate model. Multiple measurements procedure is employed to compensate for the undesired impact of gauge inaccuracy on detection capability of the Max- GWMA chart. Simulation experiments in terms of average run length (ARL) are conducted to assess the power of the developed chart to detect different out-of-control scenarios. The results confirm that the gauge inaccuracy affects the sensitivity of the Max-GWMA chart. Moreover, the results show that taking multiple measurements per item adequately decreases the adverse effect of measurement errors. Finally, a real-life example is presented to demonstrate how measurement errors increases the false alarm rate of the Max-GWMA chart.
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Authors and Affiliations

Saeid Sharafi
1
Mohammad Reza Maleki
2
Ali Salmasnia
3
Reihaneh Mansoor
4
  1. Smart Research Center, Häme University of Applied Sciences, Finland
  2. Industrial Engineering Group, Golpayegan College of Engineering, Isfahan University of Technology, Golpayegan, Iran
  3. Department of Industrial Engineering, Faculty of Engineering, University of Qom, Iran
  4. Department of Industrial Engineering, University of Eyvanekey, Eyvanekey, Iran

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