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    Wyświetlanie 1-26 z 26
    Tytuł:
    Estimation of radiation doses for transition from emergency to existing exposure situation
    Autorzy:
    Hamed, A. A.
    Salem, E. F.
    Abdien, A. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/146583.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    nuclear emergency
    emergency computer code
    severe accident
    Opis:
    The transition from emergency to existing exposure situation is an important stage in the nuclear or radiological emergency plan. It requires arrangements to be put in place and to be implemented so as to ensure that the transition is made in a coordinated and orderly manner of guidelines for adjusting the undertaken protective actions and other response actions. The delivering radiation doses to public and environmental pollution are monitoring that measurements should be implemented according to certain plan of intervention and protective actions in the different stages of the N/R accident. In this study, a computer model (RASCAL) is used to calculate the effect of severe accident could have detected on an operating nuclear power reactor PWR and the possible impact on the public. Features for the decision to implement the transition from emergency to existing exposure situation are proposed depending on the estimation of the collection of deliver exposure doses to the public and environment due to monitoring the different radiation sources resulting from the N/R accident.
    Źródło:
    Nukleonika; 2015, 60, No. 4, part 2; 943-950
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of the proanthocyanidin fraction from Medemia argun on the in vitro growth and activity of selected soil microorganisms
    Autorzy:
    Martyniuk, S.
    Hamed, A. I.
    Gębala, B.
    Stochmal, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/960253.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
    Opis:
    Many substances of plant origin, e.g. alkyloresorcinols, benzoxazinoids, essential oils, isothiocyanates or saponins, have been tested as potential antimicrobial agents to control various pathogenic microorganisms. Medemia agrun is a mysterious, not well-known species of the fan palm from the Nubian Desert Oases of Southern Egypt and Northern Sudan. Nuts of M. argun have been found to be rich (about 5%) in proanthocyanidins, consisting of afzelechin, catechin and gallocatechin as the main subunits of these polyphenolic compounds. The aim of this work was to assess effects of the proanthocyanidin (PAC) fraction obtained from M. agrun nuts on the in vitro growth and activity of two soil-borne fungal pathogens of cereals (Gaeumannomyces graminis var. tritici and Cephalosporium gramineum) and a beneficial soil bacterium, Azotobacter chroococcum, known to fix atmospheric nitrogen. The fungi were grown on PDA medium and A. chroococcum was cultured on Burk’s N-free medium supplemented with different concentrations of the PAC fraction. This fraction applied at the highest concentration tested (200 μg cm-3) did not affect the mycelial growth of the fungus Cephalosporium gramineum on PDA medium but significantly reduced (by 20%) that of Gaeumannomyces graminis var. tritici. Proliferation and N2-fixation by Azotobacter chroococcum in N-free liquid medium containing 500 μg cm-3 of the PAC fraction were more intensive than those in the medium with an equivalent concentration of glucose. It has been shown for the first time that this bacterium can use the PAC fraction as the only source of C and energy for N2-fixation.
    Źródło:
    Journal of Elementology; 2017, 22, 1
    1644-2296
    Pojawia się w:
    Journal of Elementology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Examining the Interrelation Between Job Autonomy and Job Performance: A Critical Literature Review
    Autorzy:
    Khoshnaw, Saifaddin
    Alavi, Hamed
    Powiązania:
    https://bibliotekanauki.pl/articles/2064920.pdf
    Data publikacji:
    2020
    Wydawca:
    STE GROUP
    Tematy:
    employee performance
    culture
    job performance
    Opis:
    This paper aims at examining the role of job autonomy in organizations and its relation with employee performance. This will be achieved by providing a critical review of the subject matter in existing management literature. In recent years, the concept of job autonomy has gained an increasing importance in practice of Human Resource Management. Even some studies claimed that job autonomy directly affects job performance and some of its indicators including job satisfaction, motivation, job engagement and job commitment. As a result, current paper aims at studying the effect of job autonomy on employee performance by critically reviewing existing work of human resource scholars. Main research questions approached by authors include: Is there any meaningful relationship between job autonomy and employee’s job performance distinguished in existing literature? If yes, what impact can be expected from job autonomy on employee’s job performance?
    Źródło:
    Multidisciplinary Aspects of Production Engineering; 2020, 3, 1; 606--616
    2545-2827
    Pojawia się w:
    Multidisciplinary Aspects of Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    PCR-based detection of Helicobacter pylori and non-Helicobacter pylori species among humans and animals with potential for zoonotic infections
    Autorzy:
    Youssef, A.I.
    Afifi, A.
    Abbadi, S.
    Hamed, A.
    Enany, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087111.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Helicobacter spp.
    zoonotic infections
    detection
    identification
    Źródło:
    Polish Journal of Veterinary Sciences; 2021, 24, 3; 445-450
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Neuro-fuzzy modelling of blending process in cement plant
    Autorzy:
    Araromi, D O
    Odewale, S A
    Hamed, J O
    Powiązania:
    https://bibliotekanauki.pl/articles/102547.pdf
    Data publikacji:
    2015
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    neuro-fuzzy
    blending
    carbonate content
    raw mix
    Opis:
    The profitability of a cement plant depends largely on the efficient operation of the blending stage, therefore, there is a need to control the process at the blending stage in order to maintain the chemical composition of the raw mix near or at the desired value with minimum variance despite variation in the raw material composition. In this work, neuro-fuzzy model is developed for a dynamic behaviour of the system to predict the total carbonate content in the raw mix at different clay feed rates. The data used for parameter estimation and model validation was obtained from one of the cement plants in Nigeria. The data was pre-processed to remove outliers and filtered using smoothening technique in order to reveal its dynamic nature. Autoregressive exogenous (ARX) model was developed for comparison purpose. ARX model gave high root mean square error (RMSE) of 5.408 and 4.0199 for training and validation respectively. Poor fit resulting from ARX model is an indication of nonlinear nature of the process. However, both visual and statistical analyses on neuro-fuzzy (ANFIS) model gave a far better result. RMSE of training and validation are 0.28167 and 0.7436 respectively, and the sum of square error (SSE) and R-square are 39.6692 and 0.9969 respectively. All these are an indication of good performance of ANFIS model. This model can be used for control design of the process.
    Źródło:
    Advances in Science and Technology. Research Journal; 2015, 9, 28; 27-33
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Some features of salt-architecture in the medieval Sudanic cities: Taghaza in Mali as a model
    Autorzy:
    Ali, Ismail Hamed Ismail
    Powiązania:
    https://bibliotekanauki.pl/articles/18866582.pdf
    Data publikacji:
    2023-06-30
    Wydawca:
    Wydawnictwo Adam Marszałek
    Tematy:
    Salt-Architecture
    West Africa
    Taghaza
    salinas
    Sahara
    Opis:
    The Salt played a vital role in the life of west African societies, including the land of Sudan, from the dawn of their early history. In some cases, it was even more valuable than gold because of the lack of salt in most Sudanic kingdoms, such as Ghana, Mali & Songhai. The most famous of these Salinas was known as Taghaza, in addition to Ulil & Tatantatal, etc. They were related to what is called salt-architecture. We took Taghaza as an example of this rare architecture. West Africans used salt to preserve food, for healing and even for building houses, mosques and city walls. As the city of Taghaza, currently located in Mali, is in the most famous salt region, it is considered to be the best model of a salty city in west Africa. Salt contributed to the Sahara trade, known as the trade of salt and gold. Salt was indispensable for most inhabitants of West Africa. They lived near e salt quarries and used it mainly to build their houses and any other constructions they need.
    Źródło:
    African Journal of Economics, Politics and Social Studies; 2023, 2(1); 69-77
    2956-2686
    Pojawia się w:
    African Journal of Economics, Politics and Social Studies
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hybrid PAPR reduction schemes for different OFDM-based VLC systems
    Autorzy:
    El-Ganiny, Mohamed Y.
    Khalaf, Ashraf A. M.
    Hussein, Aziza I.
    Hamed, Hesham F. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2174839.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
    Tematy:
    visible light communication
    peak-to-average power ratio
    bit error rate
    Opis:
    Orthogonal frequency division multiplexing has been widely used in many radio frequency wireless communication standards as a preferable multicarrier modulation scheme. The modulated signals of a conventional orthogonal frequency division multiplexing system are complex and bipolar. In intensity-modulated direct detection optical wireless communications, transmitted signals should be real and unipolar due to non-coherent emissions of an optical light emitting diode. In this paper, different hybrid optical systems have been proposed to satisfy real and unipolar signals. Peak-to-average power ratio is one of the biggest challenges for orthogonal frequency division multiplexing-based visible light communications. They are based on a combination of non-linear companding techniques with spreading or precoding techniques. Simulation evaluation is performed under direct current-biased optical orthogonal frequency division multiplexing, asymmetrically clipped optical orthogonal frequency division multiplexing, and Flip-orthogonal frequency division multiplexing systems in terms of peak-to-average power ratio, bit error rate, and spectral efficiency. The proposed schemes are investigated to determine a scheme with a low peak-to-average power ratio and an acceptable bit error rate. MATLABTM software has been successfully used to show the validity of the proposed schemes.
    Źródło:
    Opto-Electronics Review; 2022, 30, 3; art. no. e141951
    1230-3402
    Pojawia się w:
    Opto-Electronics Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hybrid PAPR reduction schemes for different OFDM-based VLC systems
    Autorzy:
    El-Ganiny, Mohamed Y.
    Khalaf, Ashraf A. M.
    Hussein, Aziza I.
    Hamed, Hesham F. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2174840.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
    Tematy:
    visible light communication
    peak-to-average power ratio
    bit error rate
    Opis:
    Orthogonal frequency division multiplexing has been widely used in many radio frequency wireless communication standards as a preferable multicarrier modulation scheme. The modulated signals of a conventional orthogonal frequency division multiplexing system are complex and bipolar. In intensity-modulated direct detection optical wireless communications, transmitted signals should be real and unipolar due to non-coherent emissions of an optical light emitting diode. In this paper, different hybrid optical systems have been proposed to satisfy real and unipolar signals. Peak-to-average power ratio is one of the biggest challenges for orthogonal frequency division multiplexing-based visible light communications. They are based on a combination of non-linear companding techniques with spreading or precoding techniques. Simulation evaluation is performed under direct current-biased optical orthogonal frequency division multiplexing, asymmetrically clipped optical orthogonal frequency division multiplexing, and Flip-orthogonal frequency division multiplexing systems in terms of peak-to-average power ratio, bit error rate, and spectral efficiency. The proposed schemes are investigated to determine a scheme with a low peak-to-average power ratio and an acceptable bit error rate. MATLABTM software has been successfully used to show the validity of the proposed schemes.
    Źródło:
    Opto-Electronics Review; 2022, 30, 3; art. no. e141951
    1230-3402
    Pojawia się w:
    Opto-Electronics Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Risk Analysis in Construction Phase of Oil and Gas Projects: A Critical Literature Review
    Autorzy:
    Alavi, Hamed
    Nadir, Soma Latif
    Powiązania:
    https://bibliotekanauki.pl/articles/2064865.pdf
    Data publikacji:
    2020
    Wydawca:
    STE GROUP
    Tematy:
    project management
    construction projects
    risk management
    oil and gas industry
    Opis:
    The construction phase of oil and gas projects (OGPs) is a risky process and project managers face numerous challenges during this particular period. A proper risk analysis and management during the construction phase of the OGPs not only will affect the timely and successful operation of the project as a whole, it can also affect occurrence of risks in subsequent phases and overall economic viability of the project. As a result, via using extensive literature review, this study tries to answer the question of what are main risks involved in construction phase of OGPs and which methods are used for identifying them? The outcome of this research would likely be a valuable source for construction professionals to improve project performance while managing existing risks. It is also useful to avoid common problems that befall many project managers and will assist them to have a better understanding of risk management as part of a project plan.
    Źródło:
    Multidisciplinary Aspects of Production Engineering; 2020, 3, 1; 668--680
    2545-2827
    Pojawia się w:
    Multidisciplinary Aspects of Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A proposed preamble channel estimation scheme for flip FBMC-based indoor VLC systems
    Autorzy:
    El-Ganiny, Mohamed Y.
    Khalaf, Ashraf A. M.
    Hussein, Aziza I.
    Hamed, Hesham F. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2063904.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
    Tematy:
    channel estimation
    filter bank multicarrier
    IEEE 802.15.7 standard
    interference approximation method
    visible light communication
    Opis:
    Filter bank multicarrier waveform is investigated as a potential waveform for visible light communication broadcasting systems. Imaginary inter-carrier and/or inter-symbol interference are causing substantial performance degradation in the filter bank multicarrier system. Direct current-biased optical filter bank multicarrier modulation overcomes all the problems of direct current-biased optical-orthogonal frequency division multiplexing modulation approaches in terms of speed and bandwidth. However, it also wastes a lot of energy while transforming a true bipolar signal into a positive unipolar signal by adding direct current-bias. In this paper, a flip-filter bank multicarrier-based visible light communication system was introduced to overcome this problem. In this system, a bipolar signal is converted to a unipolar signal by isolating the positive and negative parts, turning them to positive and then delivering the signal. Also, a new channel estimation scheme for a flip-filter bank multicarrier system is proposed which improves the channel estimation performance compared to that of each of the conventional schemes. The proposed system performance is measured in terms of bit error rate, normalized mean squared error, and constellation diagram. The superiority of the proposed scheme over other conventional structures has been successfully verified by MATLAB 2020b simulation experiments results. These results are evaluated under indoor visible light communication standard.
    Źródło:
    Opto-Electronics Review; 2022, 30, 1; art. no. e140859
    1230-3402
    Pojawia się w:
    Opto-Electronics Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Surface Effect on Electronic, Magnetic and Optical Properties of PtCoBi Half-Heusler: A DFT Study
    Autorzy:
    Rezazadeh, Hamed
    Hantehzadeh, Mohamadreza
    Boochani, Arash
    Powiązania:
    https://bibliotekanauki.pl/articles/2048803.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    PtCoBi
    [001] film
    DFT
    electronic property
    optical property
    Opis:
    The electronic, magnetic, and optical properties of PtCoBi half-Heusler compound [001] surfaces and its bulk state have been investigated in the framework of density functional theory using GGA approximation. The half-metallic behaviors of CoBiterm, CoPt-term and PtBi-term decrease with respect to its bulk state. The spin polarization at the Fermi level is 73.2% for the bulk state, and it is -64.4% and -64.1% for the CoBi-term and PtBi-term, respectively while less polarization has been observed for the CoPt-term. All terminations have given almost similar optical responses to light. Plasmon oscillations for the terminations occur in the range of 12.5 to 14.5 eV (21 to 22 eV) along xx (zz), and it occurs at 23 eV for the bulk state. The refractive index for the bulk and all three terminations is very high in the infrared and visible areas, meaning a very strong metallic trend in these compounds. The phenomenon of super-luminance occurs for the incident light with energy exceeding 5.5 eV for all three terminations, and it occurs in the range of 10 eV for the bulk mode. These terminations show transparent behavior after the energy of 10 eV.
    Źródło:
    Archives of Metallurgy and Materials; 2022, 67, 1; 155-166
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A comparative assessment of meteorological drought in the Tafna basin, Northwestern Algeria
    Autorzy:
    Bougara, Hanane
    Baba-Hamed, Kamila
    Borgemeister, Christian
    Tischbein, Bernhard
    Kumar, Navneet
    Powiązania:
    https://bibliotekanauki.pl/articles/2048629.pdf
    Data publikacji:
    2021
    Wydawca:
    Instytut Technologiczno-Przyrodniczy
    Tematy:
    drought
    meteorological drought indices
    Tafna basin
    trend analysis
    Opis:
    The drought ranked first in terms the natural hazard characteristics and impacts followed by tropical cyclones, regional floods, earthquakes, and volcanoes. Drought monitoring is an important aspect of drought risk management and the assessment of drought is usually done through using various drought indices. The western region in Algeria is the most affected by the drought since the middle of the 70s.The current research focuses on the analysis and comparison of four meteorological drought indices (standardized precipitation index – SPI, percent of normal index – PN, decile index – DI, and rainfall anomaly index – RAI) in the Tafna basin for different time scales (annual, seasonal, and monthly) during 1979–2011. The results showed that the SPI and DI have similar frequencies for dry and wet categories. The RAI and PN were able to detect more drought categories. Meanwhile, all indices have strong positive correlations between each other, especially with Spearman correlation tests (0.99; 1.0), the meteorological drought indices almost showed consistent and similar results in the study area. It was determined in 1982 as the driest year and 2008 as the wettest year in the period of the study. The analysis of the trend was based on the test of Mann–Kendall (MK), a positive trend of the indices were detected on a monthly scale, this increasing of indices trend represent the increasing of the wet categories which explains the increasing trend of the rainfall in the last 2000s. These results overview of the understanding of drought trends in the region is crucial for making strategies and assist in decision making for water resources management and reducing vulnerability to drought.
    Źródło:
    Journal of Water and Land Development; 2021, 51; 78-93
    1429-7426
    2083-4535
    Pojawia się w:
    Journal of Water and Land Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A note on the functional law of the iterated logarithm for Lévys area process
    Autorzy:
    N’zi, Modeste
    Eddahbi, M’hamed
    Powiązania:
    https://bibliotekanauki.pl/articles/1339281.pdf
    Data publikacji:
    1997
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Tematy:
    law of the iterated logarithm
    Lévy's area process
    Brownian motion
    maximum likelihood
    Opis:
    By using large deviation techniques, we prove a Strassen type law of the iterated logarithm, in Hölder norm, for Lévy's area process.
    Źródło:
    Applicationes Mathematicae; 1996-1997, 24, 2; 223-229
    1233-7234
    Pojawia się w:
    Applicationes Mathematicae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A study of challenges in entrepreneurship development and potential role of public sector in mitigating them – evidence from Kurdistan region of Iraq
    Autorzy:
    Alavi, Hamed
    Ghafour, Shano Ibrahim
    Powiązania:
    https://bibliotekanauki.pl/articles/2064722.pdf
    Data publikacji:
    2019
    Wydawca:
    STE GROUP
    Tematy:
    entrepreneurship
    economy
    entrepreneurship ecosystem
    market
    finance
    Opis:
    The purpose of this paper is to identify the main challenges faced by entrepreneurs in the Kurdistan region of Iraq and possible ways that regional public sector can take for the purpose of improving entrepreneurship development. Given the importance of entrepreneurs in the economic development and job creation, it’s critical to understand what drives entrepreneurs to become less effective and to investigate how the implementation of “entrepreneurship ecosystem” practiced by public policy makers mitigates these challenges. As a result, authors strive to answers two main questions in this paper: “What are the factors that hold back entrepreneurs in the Kurdistan Region to start their own businesses? “And “What measures the local government can take to mitigate such challenges?” The methodology used in this study is quantitative approach, involving a survey questionnaire. This paper consists of four parts: After the introduction, second part will provide empirical data on challenges facing entrepreneurs in Kurdistan Region of Iraq. Discussion and analysis of the findings are done in the third part. Finally, in the last part, paper will offer conclusions by summarizing the key findings.
    Źródło:
    Multidisciplinary Aspects of Production Engineering; 2019, 2, 1; 589--599
    2545-2827
    Pojawia się w:
    Multidisciplinary Aspects of Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of Security Criteria for IoT-Based Supply Chain: A Case Study of FMCG Industries
    Autorzy:
    Nozari, Hamed
    Fallah, Mohammad
    Szmelter-Jarosz, Agnieszka
    Krzemiński, Maciej
    Powiązania:
    https://bibliotekanauki.pl/articles/1934124.pdf
    Data publikacji:
    2021
    Wydawca:
    Akademia Leona Koźmińskiego w Warszawie
    Tematy:
    Internet of Things
    Fuzzy AHP
    MCDM
    supply chain management
    FMCG
    Opis:
    Purpose: In supply chains, creating a secure space for data production, sending, storing, and analysis has always been a critical issue. The main goal of this research was to evaluate the importance of various security criteria in an intelligent supply chain system. Methodology: The main data collection method was the expert survey. Experts validated the security criteria and sub-criteria. Then, the importance of these criteria was evaluated using the fuzzy analytic hierarchy process method. Findings: The results revealed that reliability and privacy with their sub-criteria were the most important ones among the obtained security criteria for IoT-based supply chain management. Practical implications: The research results can provide valuable insight for supply chains’ decision-makers. The findings can also be a good reference point for researchers who work on the IoT-based supply chain concept in other countries and sectors. Research limitations: Limitations of this study are the purposive sampling method and the limited scope of studied companies and sectors. Therefore, the article provides initial insight on the matter. Originality: The study presents the research problem from a new perspective and gives possible solutions for IoT-based supply chain management.
    Źródło:
    Central European Management Journal; 2021, 29(4); 149-171
    2658-0845
    2658-2430
    Pojawia się w:
    Central European Management Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of microwave system location on floatability of chalcopyrite and pyrite in a copper ore processing circuit
    Autorzy:
    Gholami, Hamed
    Rezai, Bahram
    Mehdilo, Akbar
    Hassanzadeh, Ahmad
    Yarahmadi, Mohammadreza
    Powiązania:
    https://bibliotekanauki.pl/articles/109728.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    microwave technology
    chalcopyrite
    pyrite
    comminution circuits
    separation efficiency
    Opis:
    The present work aims at investigating the effect of microwave local positions (i.e. before crushing (BC), after crushing (AC) and after milling (AM)) on microwave-assisted flotation of chalcopyrite and pyrite in a porphyry copper complex deposit. Individual given samples for each state were pre-treated with a variable power microwave at a power level of 90 to 900W for 15, 30, and 60s. Furthermore, froth floatation experiments were carried out using a laboratory mechanical Denver flotation cell on both microwave-treated and untreated samples. Particle surface properties were characterized by a scanning electron microscopy (SEM) and an energy-dispersive X-ray spectroscopy (EDX) analysis. The results showed that the chalcopyrite and pyrite floatabilities increased monotonically by rising the exposure time and power level for the uncrushed preconditioned samples (BC) due to the enhancement of mineral liberation degrees together with the formation of sulphide species and polysulphides on the mineral surfaces. However, flotation results of treated samples for the crushed one (AC) revealed an optimum range. Formation of intensive oxide layers on the mineral surfaces of milled samples (AM) led to a substantial reduction in their recoveries by increasing the microwave’s power level and the sample’s exposure time. The results obtained from mineral’s floatabilities in recleaner stage showed that the microwave-assisted sample at 900W for 30s at BC state favourably provided 5% higher S.E.’s than that of the untreated sample. Finally, it was concluded that the microwave pretreatment of samples induced the best floatability responses if it located before the crusher.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2020, 56, 3; 432-448
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Taxonomic Descriptions of Two Marine Ciliates, Euplotes dammamensis n. sp. and Euplotes balteatus (Dujardin, 1841) Kahl, 1932 (Ciliophora, Spirotrichea, Euplotida), Collected from the Arabian Gulf, Saudi Arabia
    Autorzy:
    Chen, Xumiao
    Zhao, Yan
    Al-Farraj, Saleh A.
    AL-QURAISHY, Saleh
    El-Serehy, Hamed A.
    Shao, Chen
    Al-Rasheid, Khaled A. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/763475.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Tematy:
    Marine ciliate, morphogenesis, morphology, new species, SSU-rRNA, taxonomy
    Opis:
    The morphology, morphogenesis and infraciliature of two marine euplotid ciliates, Euplotes dammamensis n. sp. and Euplotes balteatus (Dujardin, 1841) Kahl, 1932, isolated from a sandy beach of the Arabian Gulf, Saudi Arabia, were investigated using observations in vivo and protargol-impregnation methods. Euplotes dammamensis n. sp. is characterized by a combination of features including its huge body size (100–170 × 80–120 μm), 10 conspicuous dorsal ridges, 10 normal-sized frontoventral and two marginal cirri, and 11 dorsal kineties. Euplotes balteatus is mainly characterized by 10 frontoventral, two caudal, and two left marginal cirri, 7–10 dorsal kineties and 5–7 prominent dorsal ridges as well as double-eurystomus silverline system. The small subunit rRNA (SSU-rRNA) gene sequences were determined for both species and phylogenetic analyses based on these data indicated that E. dammamensis is most closely related to E. parabalteatus Jiang et al., 2010, and E. balteatus clusters with E. plicatum Valbonesi et al., 1997, E. orientalis Jiang et al., 2010, and E. bisulcatus Kahl, 1932.
    Źródło:
    Acta Protozoologica; 2013, 52, 2
    1689-0027
    Pojawia się w:
    Acta Protozoologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Exact solution for heat conduction inside a sphere with heat absorption using the regularized Hilfer-Prabhakar derivative
    Autorzy:
    Elhadedy, Hager
    Latif, Mohamed S. Abdel
    Nour, Hamed M.
    Kader, Abbas H. Abdel
    Powiązania:
    https://bibliotekanauki.pl/articles/2175524.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    fractional derivatives
    Laplace transform
    finite sine-Fourier transform
    heat transfer
    pochodne ułamkowe
    transformata Laplace'a
    skończona transformata sinusoidalna-Fouriera
    wymiana ciepła
    Opis:
    In this article, we utilize the finite Sine-Fourier transform and the Laplace transform for solving fractional partial differential equations with regularized Hilfer-Prabhakar derivative. These transforms are used to get analytical solutions for the time fractional heat conduction equation (TFHCE) with the regularized Hilfer-Prabhakar derivative associated with heat absorption in spherical coordinates. Two cases of Dirichlet boundary conditions are considered by obtaining an analytical solution in each case. The effect of the parameters of the regularized Hilfer-Prabhakar derivative on the heat transfer inside the sphere is discussed using some figures.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2022, 21, 2; 27--37
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Anti-breast cancer potential of honey: a narrative review
    Autorzy:
    Qadirifard, Mohammad Sadegh
    Fathabadi, Amirhossein
    Hajishah, Hamed
    Gholami, Kosar
    Abbasi, Mohammadmehdi
    Sami, Nafiseh
    Zo, Mostafa Mahmoudi
    Kadkhodaei, Fateme
    Sina, Mahla
    Ansari, Arina
    Rahimi, Zahra
    Deravi, Niloofar
    Powiązania:
    https://bibliotekanauki.pl/articles/2047807.pdf
    Data publikacji:
    2022-03-31
    Wydawca:
    Medical Education
    Tematy:
    honey
    breast cancer
    anticancer
    complementary medicine
    Opis:
    Cancer is responsible for the death of millions of people all around the world. Among the large group of cancers, the prevalence of breast cancer is highest in women. Therapeutic interventions, including removal surgery, radiation therapy, hormone therapy, and chemotherapy which is largely used, may cause adverse effects on the quality of patients’ life. This fact has encouraged researchers to find natural substances such as honey to overcome harmful effects. Nowadays, honey is recommended for plenty of abnormalities because of its antioxidant, anti-inflammatory, and antimicrobial properties. Various studies have been conducted to explore the anticancer benefits of different types of honey from different origins. In this review, we are going to summarize in-vitro, animal, and human studies on the anti-breast cancer potential of honey.
    Źródło:
    OncoReview; 2022, 12, 1; 5-15
    2450-6125
    Pojawia się w:
    OncoReview
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of wet cooling tower replacement by Heller cooling tower in a power plant
    Autorzy:
    Malekmohamadi, Mohamad Hasa
    Ahmadikia, Hossein
    Golmohamadi, Siavas
    Khodadadi, Hamed
    Powiązania:
    https://bibliotekanauki.pl/articles/27309880.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    Heller cooling tower
    wet cooling tower
    condenser
    power plant
    wieża chłodnicza Hellera
    mokra wieża chłodnicza
    skraplacz
    elektrownia
    Opis:
    Water resources are the main component of natural systems affected by climate change in the Middle East. Due to a lack of water, steam power plants that use wet cooling towers have inevitably reduced their output power. This article investigates the replacement of wet cooling towers in Isfahan Thermal Power Plant (ITPP) with Heller natural dry draft cooling towers. The thermodynamic cycle of ITPP is simulated and the effect of condenser temperature on efficiency and output power of ITPP is evaluated. For various reasons, the possibility of installing the Heller tower without increasing in condenser temperature and without changing the existing components of the power plant was rejected. The results show an increase in the condenser temperature by removing the last row blades of the low-pressure turbine. However, by replacing the cooling tower without removing the blades of the last row of the turbine, the output power and efficiency of the power plant have decreased about 12.4 MW and 1.68 percent, respectively.
    Źródło:
    Archive of Mechanical Engineering; 2023, LXX, 1; 129--149
    0004-0738
    Pojawia się w:
    Archive of Mechanical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spatial and temporal evaluation of global rainfall products in a data-scarce region: The Dez Basin, Iran
    Autorzy:
    Khoshchehreh, Mostafa
    Ghomeshi, Mehdi
    Shahbazi, Ali
    Bolboli, Hossein
    Saberi, Hamed
    Gorjizade, Ali
    Powiązania:
    https://bibliotekanauki.pl/articles/1844366.pdf
    Data publikacji:
    2021
    Wydawca:
    Instytut Technologiczno-Przyrodniczy
    Tematy:
    CMORPH
    ERA5
    ERA-Interim
    PERSIANN-CCS
    precipitation datasets
    reanalysis data
    satellite-based precipitation
    Opis:
    The limitation in approachability to rainfall data sources with an appropriate spatial-temporal distribution is a significant challenge in different parts of the world. The development of general circulation models and mathematical algorithms has led to the generation of various rainfall products as new sources with the potential to overcome the shortage in datascarce basins. In this study, the performance of the PERSIANN-CCS and CMORPH satellite-based rainfall product, as well as the ERA5 and ERA-Interim reanalysis, was evaluated based on detection skill and quantitative metrics in a daily, monthly and seasonal time scales in the Dez basin located in the southwest of Iran. The basin has a wide topographic variation and scattered rain gauge stations. Overall results denote that the ERA5 dataset has the best performance in all statistic verification than other rainfall products. Based on the daily evaluation of all rainfall products, the false alarm rate (FAR) is higher than 0.5, so none of the datasets could capture the temporal variability of rainfall occurrence. This study has covered the western parts of the Zagros steep slopes in which the topographic conditions have a significant effect on the activity of rainfall systems. On a monthly scale, the mean value of the correlation coefficient (CC) for ERA5, ERA-Interim, PER-SIANN-CCS, and CMORPH was equal to 0.86, 0.85, 0.51, 0.39, respectively. The results of seasonal evaluation suggested that all datasets have better rainfall estimation in autumn and winter, and the capability of all datasets dramatically decreased in the spring. The current paper argues that the ERA5 reanalysis typically outperforms ERA-Interim and can be considered as a reliable rainfall source in the future hydrological investigation in the southwest of Iran.
    Źródło:
    Journal of Water and Land Development; 2021, 48; 148-161
    1429-7426
    2083-4535
    Pojawia się w:
    Journal of Water and Land Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microstructure characterization of Nafion® HP JP as a proton exchange membrane for fuel cell: Positron annihilation study
    Autorzy:
    Mohamed, Hamdy
    Abdel-Hady, E.
    Abdel-Hamed, M.
    Said, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1057926.pdf
    Data publikacji:
    2017-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.70.Bj
    82.47.Nj
    72.80.Le
    36.10.Dr
    88.30.J-
    88.30.pf
    Opis:
    Free volume size V_{f} and proton conductivity σ of a novel polymer electrolyte membrane were investigated as a function of temperature and relative humidity up to 140°C and 80%, respectively. The free volume size V_{f} for Nafion® HP JP reflect the α-transition temperature at about 98°C. In addition the free volume size V_{f} for Nafion® HP JP is smaller than that for Nafion® NRE212 membrane which leads to lower methanol permeability of the former membrane. The proton conductivity σ for Nafion® HP JP decreases with increase of temperature up to transition temperature due to free and bound water loss, then it starts to increase due to dynamic segmental motion. It increases for Nafion® HP JP with the increase of the relative humidity. A good correlation between V_{f} and σ was successfully established for both membranes which indicates that σ is governed by the free volume. In conclusion, Nafion® HP JP is a suitable membrane for a proton exchange membrane fuel cell application.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 5; 1543-1547
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A combined field and automatic approach for lithological discrimination in semi-arid regions, the case of geological maps of bir later region and its vicinity, Nementcha mounts, Algeria
    Autorzy:
    Chibani, Abdelmouhcene
    Hadji, Riheb
    Younes, Hamed
    Powiązania:
    https://bibliotekanauki.pl/articles/2201670.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet Rolniczy im. Hugona Kołłątaja w Krakowie
    Tematy:
    Nememcha Mountains
    PCA
    MNF
    directional filter
    unsupervised classification
    Góry Nememcha
    filtr kierunkowy
    klasyfikacja nienadzorowana
    Opis:
    The Sahara’s Nememcha mountains chain suffers from a significant lack of large-scale geological information. In the Bir Later region with complex morpho-structural settings and arid climate conditions; geological maps have not been yet completed by competent authorities. However, this region harbours Algeria’s largest phosphate mine; with its reserves estimated at more than one billion tons of ore grading 20% phosphorus pentoxide. Geomatic-based techniques of Multisource Remote Sensing data allow the classification and identification of the lithologic features. The adopted method quarries the spectral signal, the alteration processes, and the thickness of the rocky banks. For this task, we apply Principal Component Analysis (PCA), Minimum Noise Fraction (MNF), directional filters, and unsupervised classification (K-Means data) techniques to calibrate and correct Landsat 8 OLI and Sentinel-2A multispectral images. A petrographic study with field and laboratory work was carried out in order to confirm the machine description of the different facies. The results showed that the proposed lithology classification scheme can achieve accurate classification of all lithologic types, in the Cenozoic, Mesozoic, and Holocene deposits of the study area. The lithological map obtained from the GIS-RS-Processing is highly correlated with our field survey. Therefore, multispectral image data (Landsat 8 OLI and Sentinel-2A) coupled with an advanced image enhancement technique and field surveys are recommended as a rapid and cost-effective tool for lithologic discrimination and mapping. The experimental results fully demonstrated the advantages of the reliance on laboratory tests in the sensed lithology validation in an arid area.
    Źródło:
    Geomatics, Landmanagement and Landscape; 2022, 4; 7--26
    2300-1496
    Pojawia się w:
    Geomatics, Landmanagement and Landscape
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Detection of partial rotor bar rupture of a cage induction motor using least square support vector machine approach
    Autorzy:
    Birame, M’hamed
    Bessedik, Sid Ahmed
    Benkhoris, Mohamed Fouad
    Powiązania:
    https://bibliotekanauki.pl/articles/1840890.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    fault diagnosis
    partial rupture rotor bar
    spectral analysis
    least square support vector machine
    LS-SVM
    diagnostyka uszkodzeń
    silnik indukcyjny
    wirnik
    analiza widmowa
    maszyna wektorów nośnych
    Opis:
    Squirrel cage induction motors suffer from numerous faults, for example cracks in the rotor bars. This paper aims to present a novel algorithm based on Least Squares Support Vector Machine (LS-SVM) for detection partial rupture rotor bar of the squirrel cage asynchronous machine. The stator current spectral analysis based on FFT method is applied in order to extract the fault frequencies related to rotor bar partial rupture. Afterward the LS-SVM approach is established as monitoring system to detect the degree of rupture rotor bar. The training and testing data sets used are derived from the spectral analysis of one stator phase current, containing information about characteristic harmonics related to the partial rupture rotor bar. Satisfactory and more accurate results are obtained by applying LS-SVM to fault diagnosis of rotor bar.
    Źródło:
    Diagnostyka; 2021, 22, 1; 57-63
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hybrid binary whale optimization algorithm based on taper shaped transfer function for software defect prediction
    Hybrydowy, binarny algorytm WOA oparty na transmitancji stożkowej do prognozowania defektów oprogramowania
    Autorzy:
    Alnaish, Zakaria A. Hamed
    Hasoon, Safwan O.
    Powiązania:
    https://bibliotekanauki.pl/articles/27315468.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
    Tematy:
    feature selection
    binary whale optimization algorithm
    taper-shaped transfer function
    software defect prediction
    wybór cech
    algorytm optymalizacji binarnej
    transmitancja stożkowa
    przewidywanie defektów oprogramowania
    Opis:
    Reliability is one of the key factors used to gauge software quality. Software defect prediction (SDP) is one of the most important factors which affectsmeasuring software's reliability. Additionally, the high dimensionality of the features has a direct effect on the accuracy of SDP models.The objective of this paper is to propose a hybrid binary whale optimization algorithm (BWOA) based on taper-shape transfer functions for solving feature selection problems and dimension reduction with a KNN classifier as a new software defect prediction method. In this paper, the values of a real vector that representsthe individual encoding have been converted to binary vector by using the four types of Taper-shaped transfer functionsto enhance the performance of BWOA to reduce the dimension of the search space. The performance of the suggestedmethod (T-BWOA-KNN)was evaluatedusing eleven standard software defect prediction datasets from the PROMISE and NASA repositories depending on the K-Nearest Neighbor (KNN) classifier. Seven evaluation metrics have been used to assess the effectiveness of the suggested method. The experimental results have shownthat the performanceof T-BWOA-KNNproduced promising results compared to other methods including ten methods from the literature, four typesof T-BWOAwith the KNN classifier. In addition, the obtained results are compared and analyzed with other methods from the literature in termsof the average numberof selected features (SF) and accuracy rate (ACC) using the Kendall W test. In this paper, a new hybrid software defect prediction methodcalledT-BWOA-KNNhas been proposed which is concerned with the feature selection problem. The experimental results have provedthatT-BWOA-KNN produced promising performance compared with other methods for most datasets.
    Niezawodność jest jednym z kluczowych czynników stosowanych do oceny jakości oprogramowania.Przewidywanie defektów oprogramowania SDP (ang. Software Defect Prediction) jest jednym z najważniejszych czynników wpływających na pomiar niezawodności oprogramowania. Dodatkowo, wysoka wymiarowość cech ma bezpośredni wpływ na dokładność modeli SDP.Celemartykułu jest zaproponowanie hybrydowego algorytmu optymalizacji BWOA (ang. Binary Whale Optimization Algorithm) w oparciu o transmitancję stożkową do rozwiązywania problemów selekcji cech i redukcji wymiarów za pomocą klasyfikatora KNN jako nowej metody przewidywania defektów oprogramowania.W artykule, wartości wektora rzeczywistego, reprezentującego indywidualne kodowanie zostały przekonwertowane na wektor binarny przy użyciu czterech typów funkcji transferu w kształcie stożka w celu zwiększenia wydajności BWOA i zmniejszenia wymiaru przestrzeni poszukiwań.Wydajność sugerowanej metody (T-BWOA-KNN) oceniano przy użyciu jedenastu standardowych zestawów danych do przewidywania defektów oprogramowania z repozytoriów PROMISE i NASA w zależności od klasyfikatora KNN. Do oceny skuteczności sugerowanej metody wykorzystano siedemwskaźników ewaluacyjnych. Wyniki eksperymentów wykazały, że działanie rozwiązania T-BWOA-KNN pozwoliło uzyskaćobiecujące wyniki w porównaniu z innymi metodami, w tym dziesięcioma metodami na podstawie literatury, czterema typami T-BWOA z klasyfikatorem KNN. Dodatkowo, otrzymane wyniki zostały porównanei przeanalizowane innymi metodami z literatury pod kątem średniej liczby wybranych cech (SF) i współczynnika dokładności (ACC), z wykorzystaniem testu W.Kendalla. W pracy, zaproponowano nową hybrydową metodę przewidywania defektów oprogramowania, nazwaną T-BWOA-KNN, która dotyczy problemu wyboru cech. Wyniki eksperymentów wykazały, że w przypadku większości zbiorów danych T-BWOA-KNN uzyskała obiecującą wydajnośćw porównaniu z innymi metodami.
    Źródło:
    Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2023, 13, 4; 85--92
    2083-0157
    2391-6761
    Pojawia się w:
    Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Efficiency of some meteorological drought indices in different time scales, case study: wadi Louza basin (NW-Algeria)
    Efektywność niektórych wskaźników suszy meteorologicznej w różnej skali czasu na przykładzie zlewni uedu Louza w północno-zachodniej Algierii
    Autorzy:
    Djellouli, F.
    Bouanani, A.
    Baba-Hamed, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/293111.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Technologiczno-Przyrodniczy
    Tematy:
    drought
    effective drought index
    standardised precipitation index
    wadi Louza
    efektywny wskaźnik suszy
    susza
    ued Louza
    wskaźnik standaryzowanego opadu
    Opis:
    Drought is an insidious hazard of nature in many parts of the world. It originates from persistent shortage of precipitation over a specific region for a specific period of time and has a conceptual and operational definition. Drought impact on some activity, group, or environmental sector depends on the extent of water shortage and ground conditions. Algeria and especially the western region has experienced several periods of drought over the last century, since 1975 to the present day. The most recent drought in 1981, 1989, 1990, 1992, 1994 and 1999 was characterized by its intensity and spatial extent. Drought is identified using various drought indices (meteorological, hydrological and agricultural). In this research, we focus on the meteorological drought, to assess the reliability of these indices under changing climatic conditions. Data was recorded for the period of 1980–2009 at wadi Louza catchment (NW-Algeria). For describing and monitoring drought severity periods, we calculated the correlation between both meteorological drought indices: Standardised Precipitation Index (SPI) and Effective Drought Index (EDI). The results show that the watershed of wadi Louza has experienced a severe meteorological drought. The correlation between meteorological drought indices was good for all time steps and the best was found for 9-month time step. The obtained results may provide some scientific support for fighting against droughts.
    Susza jest naturalnym zagrożeniem w wielu częściach świata. Powstaje wskutek trwałego ograniczenia ilości opadów w danym regionie i okresie czasu. Jest zdefiniowana w sensie konceptualnym i operacyjnym. Wpływ suszy na różne rodzaje działalności człowieka i na środowisko zależy od rozmiaru deficytu wody i od warunków glebowych. Algieria, szczególnie jej zachodnia część doświadczyła okresów intensywnej suszy już w ubiegłym wieku, począwszy od roku 1975 r., i doświadcza ich po dzień dzisiejszy. Ostatnia susza charakteryzowała się dużą intensywnością i przestrzennym zasięgiem. Suszę identyfikuje się, używając różnych wskaźników meteorologicznych, hydrologicznych lub rolniczych. W badaniach prezentowanych w niniejszej pracy skupiono się na suszy meteorologicznej, aby ocenić wiarygodność tych wskaźników w zmieniających się warunkach klimatycznych. Dane notowano w okresie 1980–2009 w zlewni uedu Louza w północno-zachodniej Algierii. Na potrzeby charakterystyki i monitoringu okresów suszy obliczono korelację między dwoma wskaźnikami – wskaźnikiem standaryzowanego opadu (SPI) i efektywnym wskaźnikiem suszy (EDI). Wyniki dowodzą, że w zlewni uedu Louza wystąpiła głęboka susza meteorologiczna. Korelacja między wskaźnikami suszy meteorologicznej była dobra w odniesieniu do wszystkich kroków czasowych, ale najlepsza w odniesieniu do okresów 9-miesięcznych. Uzyskane wyniki mogą stanowić naukowe wsparcie w walce z suszą.
    Źródło:
    Journal of Water and Land Development; 2016, 31; 33-41
    1429-7426
    2083-4535
    Pojawia się w:
    Journal of Water and Land Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-26 z 26

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