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Number of results: 90
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Dobrochna Bolewska 1943-2011

Wanda Karkucińska
Pamiętnik Biblioteki Kórnickiej | 2013 | tom 30 | 239
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Authors and Affiliations

Wanda Karkucińska

Classification of text documents by using expanded terms in Latent Semantic Analysis

Bożena Śmiałkowska Marcin Gibert
Theoretical and Applied Informatics | 2013 | vol. 25 | No 3-4 | 239-250
Keywords text classification information extraction Latent Semantic Analysis information retrieval text representation
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Abstract

In this article attention is paid to improving the quality of text document classification. The common techniques of analysis of text documents used in classification are shown and the weakness of these methods are stressed. Discussed here is the integration of quantitative and qualitative methods, which is increasing the quality of classification. In the proposed approach the expanded terms, obtained by using information patterns are used in the Latent Semantic Analysis. Finally empirical research is presented and based upon the quality measures of the text document classification, the effectiveness of the proposed approach is proved.

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Authors and Affiliations

Bożena Śmiałkowska
Marcin Gibert

Probing 3D chaotic Thomas’ cyclically attractor with multimedia encryption and electronic circuitry

NajeebAlam Khan Muhammad Ali Qureshi Saeed Akbar Asmat Ara
Archives of Control Sciences | 2023 | vol. 33 | No 1 | 239-271 | DOI: 10.24425/acs.2023.145120
Keywords Thomas’ cyclically attractor fractional calculus chaos encryption
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Abstract

This study investigates Thomas’ cyclically symmetric attractor dynamics with mathematical and electronic simulations using a proportional fractional derivative to comprehend the dynamics of a given chaotic system. The three-dimensional chaotic flow was examined in detail with Riemann-Liouville derivative for different values of the fractional index to highlight the sensitivity of chaotic systems with initial conditions. Thus, the dynamics of the fractional index system were investigated with Eigenvalues, Kaplan–Yorke dimension, Lyapunov exponent, and NIST testing, and their corresponding trajectories were visualized with phase portraits, 2D density plot, and Poincaré maps. After obtaining the results, we found that the integer index dynamics are more complex than the fractional index dynamics. Furthermore, the chaotic system circuit is simulated with operational amplifiers for different fractional indices to generate analog signals of the symmetric attractor, making it an important aspect of engineering. The qualitative application of our nonlinear chaotic system is then applied to encrypt different data types such as voice, image, and video, to ensure that the developed nonlinear chaotic system can widely applied in the field of cyber security.
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Authors and Affiliations

NajeebAlam Khan
1
Muhammad Ali Qureshi
2
Saeed Akbar
1
Asmat Ara
3
  1. Department of Mathematics, University of Karachi, Karachi 75270, Pakistan
  2. Department of Physics, University of Karachi, Karachi 75270, Pakistan
  3. College of Humanities and Sciences, PAF-KIET, Karachi 75190, Pakistan

Endogeneous Structural Change in General Equilibrium

Krzysztof Makarski Joanna Tyrowicz
Central European Journal of Economic Modelling and Econometrics | 2023 | No 3 | 215-239 | DOI: 10.24425/cejeme.2023.147909
Keywords structural change demographic change inequality
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Abstract

We study the evolution of income and wealth inequality in an economy undergoing endogenous structural change with imperfect labor mobility. Our economy features two sectors: services and manufacturing. With faster TFP growth in manufacturing, labor reallocates from manufacturing to services. This reallocation is slower due to labor mobility frictions, which in turn, raises relative wages in services. As a result, income inequality is higher. Moreover, we study the impact of structural change on wealth inequality. Its economic intuition is more ambiguous. On the one hand, increased income dispersion implies increased dispersion in the ability to accumulate wealth across individuals. On the other hand, younger workers who hold the least assets are the most mobile across sectors. Their incomes are improved, which boosts their savings, which works towards equalizing wealth distribution. The consequence of these changes can only be verified with a computational model. To this end, we construct an overlapping generations model with two sectors: manufacturing and services. Our model also features heterogeneous individuals. With our model, we are able to show how the structural change affected the evolution of income and wealth inequality in Poland as of 1990.
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Authors and Affiliations

Krzysztof Makarski
1
Joanna Tyrowicz
2
  1. SGH Warsaw School of Economics and FAME|GRAPE
  2. FAME|GRAPE, University of Regensburg, University of Warsaw, and IZA

The English interjection oh in specialist literature and translation

Anna Drzazga
LINGUISTICA SILESIANA | 2021 | vol. 42 | 239-259 | DOI: 10.24425/linsi.2021.137239
Keywords interjections interjection oh translation translation strategies
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Abstract

The following paper aims to analyse the functions of the interjection oh in the English corpus provided by Helen Fielding’s Bridget Jones’s Diary and its translation into Polish. Once the functions and patterns of the form are defined, the translation strategies employed are analysed. The study reveals which translational strategies proposed by Cuenca (2006) are employed in the translation of oh: literal translation, using an interjection with dissimilar form but having the same meaning, using a non‑interjective structure but with similar meaning, using an interjection with a different meaning, omission, or addition of usually a primary interjection. The analysis of the interjection oh is preceded by a very brief presentation of various approaches focusing on the problem of defining and classifying interjections, as well as the presentation of the research concerning the interjection oh and its description in the specialist literature.
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Authors and Affiliations

Anna Drzazga
1
  1. University of Silesia in Katowice

Foreign language writing anxiety among adult advanced learners of English

Małgorzata Marzec-Stawiarska
LINGUISTICA SILESIANA | 2012 | vol. 33 | 221-239
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Abstract

The article aims to discuss foreign language writing anxiety and present the results of the study which was to investigate whether writing apprehension can be observed among advanced adult learners of English. Analysing anxiety from a three dimensional perspective proposed by Lang (1971) the study revealed that advanced adult students most intensely experience cognitive anxiety whose most prevailing symptoms are panic, worry and elements of test anxiety. Somatic anxiety has also been observed in this group of participants with heart pounding, freezing up, mind going blank and jumbled thoughts as the most common symptoms. Finally, the research revealed that avoidance behaviour appears infrequently among advanced writers. The research results have been used as the basis for formulating pedagogical implications on how to reduce students’ writing apprehension.

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Authors and Affiliations

Małgorzata Marzec-Stawiarska

Sound Wave Radiation from Partially Lined Duct

Burhan Tiryakioglu Ahmet Demir
Archives of Acoustics | 2019 | vol. 44 | No 2 | 239-249 | DOI: 10.24425/aoa.2019.128487
Keywords Wiener-Hopf Fourier transform duct saddle point
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Abstract

The radiation of sound waves from partially lined duct is treated by using the mode-matching method in conjunction with the Wiener-Hopf technique. The solution is obtained by modification of the Wiener-Hopf technique and involves an infinite series of unknowns which are determined from an infinite system of linear algebraic equations. Numerical solution of this system is obtained for various values of the problem parameters, whereby the effects of these parameters on the sound diffraction are studied. A perfect agreement is observed when the results of radiated field are compared numerically with a similar work existing in the literature.

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Authors and Affiliations

Burhan Tiryakioglu
Ahmet Demir

Commercial Penta-BDE Mixtures in Dust Samples from Indoor Environments in Lublin, Poland - a Case Study

Amelia Staszowska Bernard Połednik Marzenna R. Dudzińska Jacek Czerwiński
Archives of Environmental Protection | 2008 | vol. 34 | No 3 | 239-247
Keywords Flame retardants polybrominated diphenyl ethers (PBOEs) Penta-BOE dust indoor air quality
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Abstract

Levels and distribution of selected polybrorninated diphenyl ether congeners in dust samples taken from different indoor environments in Lublin, South-Eastern Poland, are reported. The most abundant congeners, found in the majority of sampling sites, were BOE 47, 100 and 28, respectively. The highest levels of examined congeners were observed in dust samples taken from a computer repair facility and labs. BOE 47, 99 and 100, occurring at highest levels and having the greatest contribution confirm that in Polish indoor environments polymer products contain Penta - BOE technical mixture.
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Authors and Affiliations

Amelia Staszowska
Bernard Połednik
Marzenna R. Dudzińska
Jacek Czerwiński

Rhizospheric Penicillium and Talaromyces strains in Austrocedrus chilensis native forests: identification and evaluation of biocontrol candidates against the pathogen Phytophthora austrocedri

Jorge Ariel Marfetán María Laura Vélez Ricardo Comerio Ana Gallo Stella Romero
Journal of Plant Protection Research | 2023 | vol. 63 | No 2 | 239-253 | DOI: 10.24425/jppr.2023.145757
Keywords Austrocedrus chilensis biological control fungal diversity Phytophthora disease rhizosphere
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Abstract

The aims of this study were to prospect Penicillium and Talaromyces species associated with Austrocedrus chilensis in sites with and without Austrocedrus Root Disease (ARD), which is caused by the pathogen Phytophthora austrocedri; and to find Penicillium sp. strains with biocontrol activity against this disease. Isolations from sites with and without the prevalence of ARD were made, and the obtained isolates were phenotypically and molecularly identified to species level. Several Penicillium species were isolated from all sites; five of them were exclusively isolated from sites with ARD. Penicillium communities were compared through multivariate analyses; communities were more complex in sites with ARD. Biocontrol activity of Penicillium and Talaromyces isolates was evaluated using co-cultures with Ph. austrocedri. Penicillium glabrum, T. amestolkiae, P. palitans, and P. crustosum showed the highest biocontrol effect. Our results highlight that Penicillium species have high biocontrol activity, which also reinforces the hypothesis that some Penicillium species could be used in formulating a control strategy.
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Authors and Affiliations

Jorge Ariel Marfetán
1 2
ORCID: ORCID
María Laura Vélez
3 4
ORCID: ORCID
Ricardo Comerio
5
ORCID: ORCID
Ana Gallo
1 6
ORCID: ORCID
Stella Romero
2
ORCID: ORCID
  1. Phytopathology and Applied Microbiology, Centro de Investigación y Extensión Forestal Andino Patagónico (CIEFAP), Argentina
  2. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
  3. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Phytopathology and Applied Microbiology, Centro de Investigación y Extensión Forestal Andino Patagónico (CIEFAP), Argentina
  4. Facultad de Ingeniería y Facultad de Ciencias Naturales y Ciencias de la Salud, Universidad Nacional de la Patagonia San Juan Bosco (UNPSJB), Argentina
  5. Estación Experimental Agropecuaria Anguil “Ing. Agr. Guillermo Covas”, Instituto Nacional de Tecnología Agropecuaria (INTA), Argentina
  6. Fondo para la Investigación Científica y Tecnológica (FONCYT), Agencia Nacional de Promoción de la Investigación, el Desarrollo Tecnológico y la Innovación (Agencia I+D+I), Argentina

Dynamic modelling of an anaerobic reactor treating coffee wet wastewater via multiple regression model

Yans Guardia-Puebla Edilberto Llanes-Cedeño Ana Velia Domínguez-León Quirino Arias-Cedeño Víctor Sánchez-Girón Gert Morscheck Bettina Eichler-Löbermann
Journal of Water and Land Development | 2021 | No 50 | 229-239 | DOI: 10.24425/jwld.2021.138178
Keywords coffee wet wastewater modelling multiple regression model upflow anaerobic sludge blanket (UASB)
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Abstract

A multiple regression model approach was developed to estimate buffering indices, as well as biogas and methane productions in an upflow anaerobic sludge blanket (UASB) reactor treating coffee wet wastewater. Five input variables measured (pH, alkalinity, outlet VFA concentration, and total and soluble COD removal) were selected to develop the best models to identify their importance on methanation. Optimal regression models were selected based on four statistical performance criteria, viz. Mallow’s Cp statistic (Cp), Akaike information criterion ( AIC), Hannan– Quinn criterion ( HQC), and Schwarz–Bayesian information criterion ( SBIC). The performance of the models selected were assessed through several descriptive statistics such as measure of goodness-of-fit test (coefficient of multiple determination, R2; adjusted coefficient of multiple determination, Adj-R2; standard error of estimation, SEE; and Durbin–Watson statistic, DWS), and statistics on the prediction errors (mean squared error, MSE; mean absolute error, MAE; mean absolute percentage error, MAPE; mean error, ME and mean percentage error, MPE). The estimated model reveals that buffering indices are strongly influenced by three variables (volatile fatty acids (VFA) concentration, soluble COD removal, and alkalinity); while, pH, VFA concentration and total COD removal were the most significant independent variables in biogas and methane production. The developed equation models obtained in this study, could be a powerful tool to predict the functionability and stability for the UASB system.
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Authors and Affiliations

Yans Guardia-Puebla
1
ORCID: ORCID
Edilberto Llanes-Cedeño
2
ORCID: ORCID
Ana Velia Domínguez-León
3
Quirino Arias-Cedeño
1
ORCID: ORCID
Víctor Sánchez-Girón
4
ORCID: ORCID
Gert Morscheck
5
Bettina Eichler-Löbermann
5
ORCID: ORCID
  1. University of Granma, Study Center for Applied Chemistry, Cuba
  2. Faculty of Architecture and Engineering, International SEK University, Quito, Ecuador
  3. Language Center, University of Granma, Cuba
  4. College of Agricultural, Food and Biosystems Engineering, Technical University of Madrid, Spain
  5. Faculty of Agronomy and Crop Science, University of Rostock, Germany

The eco-hydraulics base as flood mitigation to overcome erosion and sedimentation problems: A case study in the Lae Kombih River, Indonesia

Ziana Ziana Azmeri Azmeri Alfiansyah Yulianur Ella Meilianda
Journal of Water and Land Development | 2022 | No 55 | 229-239 | DOI: 10.24425/jwld.2022.142326
Keywords eco-hydraulics erosion riverbank sedimentation vegetation diameter
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Abstract

Erosion and sedimentation have a very big influence on flooding. Floods are strongly influenced by land use and population activities that change the river’s physical condition, including erosion and sedimentation. The river upstream was very steep, and the downstream was narrowing and meandering with high rainfall recorded. This study analyses erosion, sedimentation, and its handling using the eco-hydraulic base. The method involves input rainfall data, river hydraulics, land use, watershed area, and land cover. The analysis of hydrology, hydraulics, land use, flood discharge, and eco-hydraulic, inundation height, vegetation diameter, velocity reduced, and riverbank width measured in five bridges cross-sections along the river. The eco-hydraulic compares the width of existing riverbanks and design, high inundation, and the vegetation diameter to minimise flood discharge. Erosion in the right cliff is 22.73% and the left cliff is 37.04%, land erosion was 225.83 Mg∙ha –1∙year –1. The river’s bottom is formed by rocks of 0.18–1.30 mm. The plantation land used around the Lae Kombih River grows mainly an oil palm with a diameter of 0.5–0.7 m. The riverbank design on 100 m for vegetation diameter of 0.1–1.0 m can retain flood discharge for five years return period up to 72.3%, resulting in discharge of 112.04209.43 m 3∙s –1. The largest erosion and sedimentation on the river border is Dusun Silak, so it is recommended to plant Vetiveria zizanioides, Ipomoea carnea and Bambusoideae. An inundation height of 0.9 m can be recommended to design an embankment to be used as flood mitigation.
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Authors and Affiliations

Ziana Ziana
1 2
ORCID: ORCID
Azmeri Azmeri
1 2
ORCID: ORCID
Alfiansyah Yulianur
1 2
ORCID: ORCID
Ella Meilianda
1 2
ORCID: ORCID
  1. Universitas Syiah Kuala, Doctoral Program, School of Engineering, Banda Aceh, 23111, Indonesia
  2. Universitas Syiah Kuala, Department of Civil Engineering, Banda Aceh, 23111, Indonesia

Retraction: Comparative physiological aspects of plasma hemostasis of some commercial fish species [The editors of the Journal of Water and Land Development retract this article because of autoplagiarism found: an article with the same title and results by Daria Igorevna Berezina and Luybov Leonidovna Fomina was identified in the Egyptian Journal of Aquatic Biology & Fisheries ( https://ejabf.journals.ekb.eg/article_209965.html].

Holya Alobaidy Hayder Dawood Saleem Aiman Mohammed Baqir Al-Dhalimy
Journal of Water and Land Development | 2022 | No 54 | 239-242 | DOI: 10.24425/jwld.2022.141578
Keywords blood carp clotting coagulogram commercial fish species plasma hemostasis sturgeon tilapia
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Abstract

The hemostasis system is designed to ensure the integrity of the body’s internal environment, stop bleeding, and maintain a liquid state of blood in the vascular channel. Modern biological and veterinary science presents highly fragmented and scarce data containing clinical and diagnostic clotting characteristics in different fish species. An essential point emphasising the practical component of such studies is spontaneous thrombus formation in fish farming described in the literature. The present research is devoted to the study of the functional state of plasma hemostasis in some ray- finned commercial fishes: phylogenetically more ancient cartilaginous ganoids – sturgeon Acipenser baerii and hybrid of sterlet A. ruthenus and starred sturgeon A. stellatus, as well as bony fishes – carp Cyprinus carpio and tilapia Oreochromis niloticus. It should be noted that the current study was performed at the aquaculture development center “AquaBioCenter” of VSDFA from 2015 to 2020. Species-specific features of clotting were revealed: activation by common and extrinsic pathways, characterised by thrombin time ( TT), prothrombin time ( PT), and fibrinogen concentration, is several times faster in cartilaginous ganoids than in both bony fish species; hemostasis with activation of the intrinsic pathway, characterised by activated partial thromboplastin time ( APTT), is faster in hybrids and tilapias, in contrast to carps and sturgeons. Content of soluble fibrin monomer complexes ( SFMC) in all fish was higher than in dogs and humans but lower than in cattle. The highest amount of SFMC was detected in carps, the lowest – in cartilaginous ganoids.
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Authors and Affiliations

Holya Alobaidy
1
ORCID: ORCID
Hayder Dawood Saleem
2
ORCID: ORCID
Aiman Mohammed Baqir Al-Dhalimy
3 4
ORCID: ORCID
  1. Al-Nisour University College, College of Science, Nisour Square Tunnel 8934+85M, Baghdad, Iraq
  2. Al-Manara College For Medical Sciences, Department of Dentistry, Misan, Iraq
  3. Altoosi University College, College of Nursing, Najaf, Iraq
  4. Islamic University of Najaf, Najaf, Iraq

Molecular detection, typing, and virulence potential of Salmonella Serotypes isolated from poultry feeds

G. Shahbazi J. Shayegh C. Ghazaei M.H.M. Ghazani S. Hanifian
Polish Journal of Veterinary Sciences | 2023 | vol. 26 | No 2 | 239-247 | DOI: 10.24425/pjvs.2023.145028
Keywords Salmonella feed BOXAIR-PCR Rep- PCR drug resistance biofilm
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Abstract

Salmonella contamination in poultry feed is one of the main issues in poultry industry and public health. The aim of the present study was molecular detection and typing of Salmonella serotypes isolated from poultry feeds. Moreover, we determined the antibiotic resistance pattern and the ability of biofilm formation in the serotypes. To this end, eighty feed samples were collected from aviculture depots. Salmonella serotypes were identified by culture and PCR methods. For serological identification, a slide agglutination test was used. BOXAIR and rep-PCR methods were applied to evaluate the diversity of serotypes. The disc diffusion method was performed to evaluate the antibiotic susceptibility of serotypes to sixteen antibiotics. Biofilm formation was also assessed by the microtiter-plate test. From a total of 80 feed samples, 30 samples were contaminated with Salmonella spp., which were divided into 5 different serotypes belonging to B, C, and D serogroups. BOXAIR-PCR (D value [DI] 0.985) and rep-PCR (DI 0.991) fingerprinting of isolates revealed 23 and 19 reproducible fingerprint patterns, respectively. A higher antibiotic resistance was observed to ampicillin and doxycycline (100% each), followed by chloramphenicol (83.33%) and tetracycline (73.33%). Multidrug resistance (MDR) was detected in all Salmonella serotypes. Half of the serotypes possessed the ability of biofilm formation with varied adhesion strengths. These results revealed the high and unexpected prevalence of Salmonella serotypes in poultry feed with MDR and biofilm formation ability. BOXAIR and rep-PCR revealed a high diversity of Salmonella serotypes in feeds and subsequently indicated variation in the source of Salmonella spp. The unknown sources harboring high diversity of Salmonella serotypes indicated poor control, which could cause problems for feed manufacturing.
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Authors and Affiliations

G. Shahbazi
1
J. Shayegh
1
C. Ghazaei
2
M.H.M. Ghazani
1
S. Hanifian
3
  1. Department of Veterinary Medicine, Faculty of Veterinary and Agriculture, Shabestar Branch, Islamic Azad University, Shabestar, Iran
  2. Department of Microbiology, University of Mohaghegh Ardabili, Ardabil, Iran
  3. Department of Food Science and Technology, Biotechnology Research Center,Tabriz Branch, Islamic Azad University, Tabriz, Iran

A Dual-Band Compact Integrated Rectenna for Implantable Medical Devices

Shamil H. Hussein Khalid K. Mohammed
International Journal of Electronics and Telecommunications | 2023 | vol. 69 | No 2 | 239-245 | DOI: 10.24425/ijet.2023.144356
Keywords Implantable rectenna Folded Dipole Antenna FDA Phantom tissues layers CST suit Simulation
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Abstract

This work describes a dual band compact fully integrated rectenna circuit for implantable medical devices (IMDs). The implantable rectenna circuit consists of tunnel diode 10×10μm2 QW-ASPAT (Quantum Well Asymmetric Spacer Tunnel Layer diode) was used as the RF-DC rectifier due to its temperature insensitivity and nonlinearity compared with conventional SBD diode. SILVACO atlas software is used to design and simulate 100μm2 QW InGaAs ASPAT diode. A miniaturized dual band implantable folded dipole antenna with multiple L-shaped conducting sections is designed using CST microwave suits for operation in the WMTS band is 1.5GHz and ISM band of 5.8GHz. High dielectric constant material Gallium Arsenide (εr=12.94) and folded geometry helps to design compact antennas with a small footprint of 2.84mm3 (1×4.5×0.63) mm3. Four-layer human tissue model was used, where the antenna was implanted in the skin model at depth of 2mm. The 10-dB impedance bandwidth of the proposed compact antenna at 1.5GHz and 5.8GHz are 227MHz (1.4-1.63GHz) with S11 is -22.6dB and 540MHz (5.47-6.02GHz) with S11 is -23.1dB, whereas gains are -36.9dBi, and -24.3dBi, respectively. The output DC voltage and power of the rectenna using two stage voltage doubler rectifier (VDR) are twice that produced by the single stage at input RF power of 10dBm.
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Authors and Affiliations

Shamil H. Hussein
1
Khalid K. Mohammed
1 2
  1. Faculty of Engineering University of Mosul, Iraq
  2. University of Nineveh, Iraq

Smith, Mark. Between Temple and Tomb: The Demotic Ritual Text of Bodl. MS. Egypt. A. 3 (P), SSR 30. Wiesbaden: Harrassowitz, 2019. S. 7–205, Pl. 1–14. ISBN 978-3-447-11331-1

Stefan Bojowald
Folia Orientalia | 2022 | vol. 59 | 237-239 | DOI: 10.24425/for.2022.143843
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Authors and Affiliations

Stefan Bojowald
1
ORCID: ORCID
  1. University of Bonn, Germany

Proposed Approach for Positioning Anchorage System in Concrete

M. Habib A. Malkawi M. Awwad
Archives of Civil Engineering | Vol. 66 | No 3 | 239-252 | DOI: 10.24425/ace.2020.134395
Keywords anchor bolts setting out column base plate
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Abstract

The problem of setting out in civil engineering applications has been addressed in the literature for a long time. However, technological development has provided researchers with an opportunity of having other procedures in line with modern techniques in surveying sciences. One of the most important procedures in erecting steel structures, bridges, and precast columns of a building is the accurate placement of the anchorage system in concrete. The traditional method for staking out anchor bolts relies on sight rails, string lines, and tape measure. The precision of this art depends not only on the accuracy of observed offset distances during layout operations but also on the centerline of the anchoring template itself. Nowadays, the process of designing structures is executed using software that can perform a digital plan in CAD environment, where the coordinates of each anchor bolt can be defined. This research presents an accurate approach of positioning anchor bolts based on the second problem in surveying and total station. Error analysis and field application are described to evaluate the performance of the proposed method. However, the results indicate that the developed technique increases productivity, reduces the cost, and improves the positional accuracy.

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Authors and Affiliations

M. Habib
A. Malkawi
M. Awwad

Cracking control technique for continuous steel-concrete composite girders under negative bending moment

Min Cai Wenjie Li Zhiyong Wan Jianjun Sheng Juliang Tan Chao Ma
Archives of Civil Engineering | 2023 | vol. 69 | No 3 | 239-251 | DOI: 10.24425/ace.2023.146078
Keywords continuous steel-concrete composite girder hogging moment cracking performance strengthening approach ultra-high performance concrete
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Abstract

Continuous steel-concrete composite girder can fully utilize material strength and possess large spanning ability for bridge constructions. However, the weak cracking resistance at the negative bending moment region of the girder seriously harms its durability and serviceability. This paper investigates practical techniques to improve the cracking performance of continuous steel-concrete composite girders subjected to hogging moment.Areal continuous girderwas selected as the background bridge and introduced for numerical analysis. Modeling results show that under the serviceability limit state, the principle stress of concrete slabs near the middle piers of the bridgewas far beyond the allowable material strength, producing a maximum tensile stress of 10.0 MPa. Approaches for strengthening concrete decks at the negative moment region were developed and the effectiveness of each approach was assessed by examing the tensile stress in the slabs. Results indicate that the temporary counterweight approach decreased the maximum tensile stress in concrete slabs by 22%. Due to concrete shrinkage and creep, more than 65% of the prestressed compressive stresses in concrete slabs were finally dispersed to the steel beams. A thin ultra-high performance concrete (UHPC) overlay at the hogging moment region effectively increased the cracking resistance of the slabs, and practical engineering results convicted the applicability of the UHPC technique.
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Authors and Affiliations

Min Cai
1
ORCID: ORCID
Wenjie Li
2
ORCID: ORCID
Zhiyong Wan
3
ORCID: ORCID
Jianjun Sheng
1
ORCID: ORCID
Juliang Tan
4
ORCID: ORCID
Chao Ma
1
ORCID: ORCID
  1. Guangdong Highway Construction Co., LTD, 510623 Guangzhou, China
  2. Guangdong Yunmao Expressway Co. Ltd, 525346 Guangzhou, China
  3. Guangdong Communication Planning & Design Institute Co., Ltd,510507 Guangzhou, China
  4. Guangdong Communication Planning & Design Institute Co., Ltd, 510507 Guangzhou, China

Effect of selected bacteria of the genus Pseudomonas on the quality of raw cow’s milk

M. Kováčová J. Výrostková I. Regecová E. Dudriková J. Zahumenská S. Marcinčák
Polish Journal of Veterinary Sciences | 2024 | vol. 27 | No 2 | 229-239 | DOI: 10.24425/pjvs.2024.149353
Keywords enzymatic activity food safety microorganisms milk quality milk contamination pigment production Pseudomonas raw milk spoilage
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Abstract

Pseudomonas spp. are a psychrotrophic species associated with milk spoilage caused by its enzymatic activities. The aim of this study was to identify Pseudomonas spp. in raw cow’s milk and to investigate their associated enzymatic properties and the ability to produce pyoverdine pigment. For microbiological analysis, 2 ml of milk samples was taken in sterile sample boxes. Milk sampling was carried out according to the principles of STN EN ISO 707. By identification using the PCR method, of n=320 samples of raw cow milk a total of 73 isolates of Pseudomonas spp. were identified as P. putida (34.25%); P. fragi (13.70%); P. lundensis (9.59%) and Pseudomonas spp. (42.47%). Proteolytic activity determined at a temperature of 7°C was positive from n=20 selected isolates of Pseudomonas spp. (60%) isolates and a temperature of 25°C was positively detected (85%). Lipolytic activity determined at a temperature of 7°C was confirmed in 35% of isolates and a temperature of 25°C it was confirmed in 70% isolates. Pyoverdine pigment production was detected in 65% of isolates. The results reveal the enzymatic activity of Pseudomonas spp. present in raw cow’s milk and its spoilage potential at different temperatures in relation to pigment production.
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Bibliography

Alves MP, Salgado RL, Eller MR, Dias RS, de Paula SO, de Carvalho AF (2018) Temperature modulates the production and activity of a metallo-protease from Pseudomonas fluorescens 07A in milk. J Dairy Sci 101: 992-999.

Atia RM, Mohamed HA, AboELRoos NA, Awad DA (2023) Growth patterns of Pseudomonas aeruginosa in milk fortified with chitosan and selenium nanoparticles during refrigerated storage. World J Microbiol Biotechnol 11: 312.

Bedeltavana A, Haghkhah M, Nazar A (2010) Phenotypic characterization and PCR-ribotyping of Pseudomonas fluorescens isolates, in tracking contamination routes in the production line of pasteurized milk. Iran J Vet Res 1: 222-232.

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Authors and Affiliations

M. Kováčová
1
J. Výrostková
1
I. Regecová
1
E. Dudriková
1
J. Zahumenská
1
S. Marcinčák
1
  1. Department of Food Hygiene Technology and Safety, University of Veterinary Medicine and Pharmacy in Košice, Komenského 73, 041 81 Košice, Slovakia

Conceptual transfer from a bilingual perspective: research trends and suggestions

Jolanta Latkowska
LINGUISTICA SILESIANA | 2009 | vol. 30 | 239-251
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Abstract

This paper examines the notion of conceptual transfer within the framework of current psycholinguistic research into bilingual memory and multi-competence. In particular, it seeks to delimit the form and direction of conceptual transfer in the bilingual lexicon, as well as outlining the conditions for its occurrence. These are discussed in relation to the data collection methods employed to date, and in the light of recent findings and developments in the area of psycholinguistics and bilingualism.
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Authors and Affiliations

Jolanta Latkowska

Innovative method for heat transfer enhancement through shell and coil side fluid flow in shell and helical coil heat exchanger

Rajesh Kumar Prakash Chandra Prabhansu
Archives of Thermodynamics | 2020 | vol. 41 | No 2 | 239-256 | DOI: 10.24425/ather.2020.133631
Keywords Overall heat transfer coefficient effectiveness helical coil pressure drop
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Abstract

The effect of shell side and coil side volume flow rate on overall heat transfer coefficient, effectiveness, pressure drop and exergy loss of shell and helical coil heat exchanger were studied experimentally under steady state conditions. The working fluid, i.e., water was allowed to flow at three different flow rates of 1, 2, and 3 l/min on shell side (cold water) and at 1, 1.5, 2, 2.5, and 3 l/min on coil side (hot water) for each shell side flow rate at the temperatures of 298±0.4K and 323±0.4K, respectively. The results found that the overall heat transfer coefficient increased with increasing both shell side and coil side volume flow rates. The inner Nusselt number significantly increased with the coil side Dean number.

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Authors and Affiliations

Rajesh Kumar
Prakash Chandra
Prabhansu

A Forgotten Polish and American Medallion from 1854 in the Collection of Ludwik Gocel

Jacek Serwański
Wiadomości Numizmatyczne | 2021 | Rok LXV | 239-254 | DOI: 10.24425/wn.2021.138457
Keywords medallion biographical writings Henryk Dmochowski Saunders Charles Mason Ludwik Gocel November Uprising
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Abstract

The essay will focus on a mid-nineteenth century medallion from the vast collection of Polish bibliophile Ludwik Gocel (1889–1966). Made in 1854 in the U.S. capital, Washington, D.C., it depicts a prominent nineteenth century American, Judge Charles Mason (1804–1882), and is a valuable token of the U.S. history. It was designed and completed by Polish distinguished medalist, Henryk Dmochowski (in the U.S. known as Henry Dmochowski Saunders; b. 1810–d. 1863) who can be called a “soldier-artist,” since he participated in three Polish uprisings. Expelled from partitioned Poland, in 1851 he came to America where he was offered the chance to work as a sculptor. This essay’s main aim is to describe the fate of the medallion, apparently almost unknown in both America and Poland, with special emphasis on the role of Ludwik Gocel in its preservation. This rare piece of art has never been included in Polish or American art publications in the field of sculpture.
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Authors and Affiliations

Jacek Serwański
1
ORCID: ORCID
  1. The Institute of Slavic Studies, Polish Academy of Sciences, Warsaw, Poland

Discussion on different controllers used for the navigation of mobile robot

Ravi Raj Andrzej Kos
International Journal of Electronics and Telecommunications | 2024 | vol. 70 | No 1 | 229-239 | DOI: 10.24425/ijet.2024.149535
Keywords Artificial Intelligence (AI) autonomous mobile robot(AMR) deep learning (DL) human-robot interaction (HRI) mobile robot (MR) machine learning (ML) PID controller
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Abstract

Robots that can comprehend and navigate their surroundings independently on their own are considered intelligent mobile robots (MR). Using a sophisticated set of controllers, artificial intelligence (AI), deep learning (DL), machine learning (ML), sensors, and computation for navigation, MR's can understand and navigate around their environments without even being connected to a cabled source of power. Mobility and intelligence are fundamental drivers of autonomous robots that are intended for their planned operations. They are becoming popular in a variety of fields, including business, industry, healthcare, education, government, agriculture, military operations, and even domestic settings, to optimize everyday activities. We describe different controllers, including proportional integral derivative (PID) controllers, model predictive controllers (MPCs), fuzzy logic controllers (FLCs), and reinforcement learning controllers used in robotics science. The main objective of this article is to demonstrate a comprehensive idea and basic working principle of controllers utilized by mobile robots (MR) for navigation. This work thoroughly investigates several available books and literature to provide a better understanding of the navigation strategies taken by MR. Future research trends and possible challenges to optimizing the MR navigation system are also discussed.
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Authors and Affiliations

Ravi Raj
1
ORCID: ORCID
Andrzej Kos
1
  1. Faculty of Computer Science, Electronics, and Telecommunications, AGH University of Science and Technology, Krakow, Poland

The influence of weeds growth stage and climate conditions on optimizing dose of herbicides

Renata Kieloch Krzysztof Domaradzki
Journal of Plant Protection Research | 2003 | vol. 43 | No 3 | 233-239
Keywords herbicide efficacy weeds growth stage air temperature rainfall reduced doses
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Abstract

The outdoor pot experiments on the influence of weeds' growth stage and climate conditions on herbicides' effect were carried out in the Danish Institute of Agriculture Science in 2000-2001. The experiment concerning growth stage took into consideration three phases of Galium aparine: l, 2 and 3 whorls. The influence of temperature was performed using climate simulator running at three temperatures: 8/2°C, l 6.5/8°C, 24/16°C. The rain was applied using rain simulator 1, 3 and 6 hours after herbicides' treatment. Herbicides: Grody! 75 WG (amidosulfuron 750 g*kg-1), Aurora Super 61,5 WG (mecoprop 600 g=kg' + carfentrazone-ethyl 15 g*kt1), Lintur 70 WG (dicamba 65.9 g=kg', triasulfuron 4.1 g=kg') and Chwastox Trio 540 SL (dicamba 40 g*r1, MCPA 200 g"l', mecoprop 300 g*r') were applied in four doses: full recommended, 1/2, 1/4 and 1/8 of full dose on G. aparine. Grody! 75 WG and Aurora Super 61,5 WG were the most efficient to the youngest plants of G. aparine. Differences in susceptibility among three growth stages (1, 2, 3 whorls) to Grody! 75 WG were higher than to Aurora Super 61,5 WG. Effectiveness of tested herbicides tended to increase as temperature rose. The addition of adjuvant improved activity of herbicide Lintur 70 WG that showed satisfactory weed control even at four time reduced dose independently from temperature. The rain treatment 1, 3 and 6 hours after spraying caused reduction of Aurora Super 61,5 WG activity at 1/4 and 1/8 doses. The half dose gave a good result only when rain was applied 6 hours after treatment. Herbicide Grody! 75 WG was efficient after rain application (1, 3, 6 HAT) only at full dose.
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Authors and Affiliations

Renata Kieloch
Krzysztof Domaradzki

Synthesis and characterization of YAG:Ce phosphors for white LEDs

V. Tucureanu A. Matei A.M. Avram
Opto-Electronics Review | 2015 | vol. 23 | No 4 | 239-251
Keywords YAG:Ce phosphor solid-state sol-gel (co)precipitation
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Abstract

Worldwide commercial interest in the production of cerium doped yttrium aluminium garnet (YAG:Ce) phosphors is reflected in the widespread use of white light emitting devices. Despite of the fact that YAG:Ce is considered a “cool phosphor” it is the most important in white LED technology. This article reviews the developed techniques for producing phosphors with superior photoluminescence efficiency, including solid-state reaction, sol-gel and (co)precipitation methods. Also, by co-doping with rare earth elements, a red/blue shift is reached in the spectrum. The characteristics of YAG:Ce phosphors are investigated because the properties of the phosphors are strongly influenced by the synthesis routes and the sintering temperature treatment. After the phase analysis, morphology and emission studies of the phosphors there may be seen the conditions when the transition from the amorphous phase to the crystalline phase appears, when luminescent properties are influenced by the crystalline form, purity, average size of the particles, co-doping and so on.

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Authors and Affiliations

V. Tucureanu
A. Matei
A.M. Avram

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