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Tytuł:
Determination of Accumulated Electrons at PET Surface Using Mirror Effect Phenomena in SEM
Autorzy:
Abood, Tareq H.
Hadi, Hasan A.
Mohi, Ali T.
Powiązania:
https://bibliotekanauki.pl/articles/1192591.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Polyethylene Terephthalate
scanning electron microscope
Magnification Factor Method
Disappearing Method
Opis:
An experimental-theoretical investigation have been presented to exploring phenomena of mirror effect. The Polyethylene Terephthalate (PET) material is chosen to be a case study throughout this work. Where the scanning electron microscope (SEM) is used for executing the experiments. Attention has been focused on determination of the number of electrons that accumulated at PET surface, since it is regarded to be the most important factor for producing mirror effect images. Thus two different procedures are produced to achieve such a task namely Magnification Factor Method and Disappearing Method. Results obtained from these two approaches have clearly shown that mirror effects can accurately be used as an excellent tool to determine dielectric constant of insulator.
Źródło:
World Scientific News; 2016, 55; 27-37
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation and selection process of suppliers through analytical framework: an emprical evidence of evaluation tool
Autorzy:
Imeri, S.
Shahzad, K.
Takala, J.
Liu, Y
Sillanpää, I.
Ali, T.
Powiązania:
https://bibliotekanauki.pl/articles/407383.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
supplier evaluation
supplier performance management
supplier selection model
principal component analysis
supply chain management
Opis:
The supplier selection process is very important to companies as selecting the right suppliers that fit companies strategy needs brings drastic savings. Therefore, this paper seeks to address the key area of supplies evaluation from the supplier review perspective. The purpose was to identify the most important criteria for suppliers’ evaluation and develop evaluation tool based on surveyed criteria. The research was conducted through structured questionnaire and the sample focused on small to medium sized companies (SMEs) in Greece. In total eighty companies participated in the survey answering the full questionnaire which consisted of questions whether these companies utilize some suppliers’ evaluation criteria and what criteria if any is applied. The main statistical instrument used in the study is Principal Component Analysis (PCA). Thus, the research has shown that the main criteria are: the attitude of the vendor towards the customer, supplier delivery time, product quality and price. Conclusions are made on the suitability and usefulness of suppliers’ evaluation criteria and in way they are applied in enterprises.
Źródło:
Management and Production Engineering Review; 2015, 6, 3; 10-20
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurement of Natural radioactivity in tap water samples for selected regions in Thi-Qar Governorate - Iraq
Autorzy:
Hadi, Hasan A.
Karim, Mahmood S.
Mahi, Ali T.
Abood, Tareq H.
Powiązania:
https://bibliotekanauki.pl/articles/1192660.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
(HPGe) detector
Thi-Qar governorate
tap water
specific activity
radionuclides
Opis:
In the present work, we have measured specific activity concentrations in ten tap water samples for selected regions in Thi-Qar governorate by using high purity germanium (HPGe) detector. The results have shown that, the specific activity, for 238U was ranged from (0.65±0.8 Bq/kg) in AL- Nasir region to (1.32±0.7.8 Bq/kg) in AL-Refai region, for 232Th the specific activity was ranged from (0.120±0.34 Bq/kg) in AL-Garraf region to (0.980±0.99 Bq/kg) in AL- Dwaya region, for 40K the specific activity was ranged from (13.33±3.6 Bq/kg) in AL-Nasir region to (38.54±6.2 Bq/kg) in (AL-Garraf) region, with an average values of (0.933±0.16 Bq/kg), (0.737±0.17 Bq/kg), (24.451±7.5Bq/kg), for 238U, 232Th and 40K, respectively. In order to asses the radiological hazards of the radioactivity in tap water, we have been calculated the parameters (Raeq , DƔ, AEDin , AEDout , EAD , Iɣ , Hin and Hex).
Źródło:
World Scientific News; 2016, 47, 2; 112-122
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of the etching time and current density on Capacitance-Voltage characteristics of P-type of porous silicon
Autorzy:
Hadi, Hasan A.
Abood, Tareq H.
Mohi, Ali T.
Karim, Mahmood S.
Powiązania:
https://bibliotekanauki.pl/articles/1178661.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
electrochemical etching
heterojunction
porous silicon
thin films
Opis:
In This paper, electrochemical etching teqniques was using to formation of nano crystalline porous silicon layer on p-type Si substrates. Measurement of capacitance – voltage characteristics at various etching time and current densities were used for calculated built in voltage and type of heterojunction. The built in voltage values were decreased with increasing etching time and current densities for both anisotype Al/PS/p-Si/Al heterojunction. These characteristics are interpreted by assuming the abrupt heterojunction model. The effect of different etching time and current densities on electrical properties of PS have been investigated.
Źródło:
World Scientific News; 2017, 67, 2; 149-160
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental and Theoretical Investigation to Study the Molecular Structure, Electronic Properties, UV–Vis Spectra of Coumarin 102
Autorzy:
Mohi, Ali T.
Abood, Tareq H.
Hadi, Hasan A.
Karim, Mahmood S.
Mutlik, Falah A-H.
Alwan, Tariq J.
Powiązania:
https://bibliotekanauki.pl/articles/1178533.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
DFT
Ionization potential
TDDFT
electron affinity
energy gap and UV spectra
Opis:
In this work, we study the structure, electronic properties and electronic spectra of Coumarin 102 (C102) dissolved in ethanol as an experimental-theoretical investigation. The various properties of the ground and excited electronic states of coumarins 102 using density functional theory (DFT) and time-dependent density functional theory (TDDFT) was calculated by the B3LYP density functional model with 6-31G(d,p) basis set by Gaussian 09 W program. Spectral characteristics of coumarin 102 have been probed into by methods of experimental UV-visible, and quantum chemistry. The UV spectrum was measured in Ethanol. The optimized structures, total energies, electronic states (HOMO- LUMO), energy gap, ionization potentials, electron affinities, chemical potential, global hardness, softness, global electrophilictity, dipole moment and electrostatic potential was calculated. were calculated. We find good agreement between experimental data of UV spectrum and TDDFT excitation energies.
Źródło:
World Scientific News; 2017, 70, 2; 216-229
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Miniature size multiband planar patch antenna fabricated on a bioplastic substrate
Autorzy:
Ahsan, M. R.
Islam, M. T.
Ullah, M. H.
Arshad, H.
Ali, M. T.
Powiązania:
https://bibliotekanauki.pl/articles/199786.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
bioplastic substrate material
multiband antenna
planar patch antenna
RFID
C/X band
WiMAX application
substrat
antena szerokopasmowa
C/X
aplikacja WiMAX
Opis:
In this article, a simple design of rectangular microstrip feed planar antenna with wide arcs and square shape slot is proposed for Radio Frequency Identification (RFID),Worldwide Interoperability for Microwave Access (WiMAX) and C/X-band wireless communications. The prototype of the antenna has been fabricated 1.0 mm thick ceramic filled bioplastic substrate by using optimal dimension obtained from design/simulations and antenna performances are experimentally tested. The experimental results confirm the impedance bandwidths for S11 ≤ −10 dB are of 712 MHz (0.355-1.067 GHz), 1.38 GHz (2.92-4.3 GHz) and 2.46 GHz (6.55-9.01 GHz) for 0.788, 3.34 and 8.01 GHz band respectively. The proposed antenna shows almost steady and symmetrical radiation patterns for all three bands with the maximum gains of 1.37, 2.8 and 3.56 dBi respectively. Based on the antenna performances, it can successfully cover the frequency band requirement for RFID, WiMAX and C/X-band applications.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 4; 971-976
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ergasilus boleophthalmi sp. n. (Copepoda: Ergasilidae) parasitic on gobiid fishes from Shatt Al-Basrah Canal, South of Iraq
Autorzy:
Adday, T.
Ali, A.
Powiązania:
https://bibliotekanauki.pl/articles/840611.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
Ergasilus boleophthalmi
Copepoda
Ergasilidae
parasite
gobiid fish
Shatt Al-Basrah Canal
Iraq
animal parasite
Gobiidae
Boleophthalmus dussumieri
Bathygobius fuscus
mudskipper
dusky frillgoby
fish
new species
Źródło:
Annals of Parasitology; 2011, 57, 3
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ergasilus boleophthalmi sp. n. (Copepoda: Ergasilidae) parasitic on gobiid fishes from Shatt Al-Basrah Canal, South of Iraq
Autorzy:
Adday, T.
Ali, A.
Powiązania:
https://bibliotekanauki.pl/articles/2143376.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
Ergasilus boleophthalmi
Copepoda
Ergasilidae
parasite
gobiid fish
Shatt Al-Basrah Canal
Iraq
animal parasite
Gobiidae
Boleophthalmus dussumieri
Bathygobius fuscus
mudskipper
dusky frillgoby
fish
new species
Opis:
A new species of Ergasilus von Nordmann, 1832 (Copepoda: Ergasilidae) parasitic on the gills of two gobiid fishes Boleophthalmus dussumieri Valenciennes and Bathygobius fuscus (Rüppell, 1930) from Shatt Al-Basrah Canal, Iraq, is described. The new species differs from all its congeners by a combination of character states including the shape of the body, and the structure and armature of the swimming legs.
Źródło:
Wiadomości Parazytologiczne; 2011, 57, 3; 137-142
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Factors determining Italian online shoppers’ preference of cash on delivery : empirical analysis
Czynniki określające preferencje włoskich kupujących online w przypadku CoD : analiza empiryczna
Autorzy:
Pencarelli, T.
Škerháková, V.
Ali Taha, V.
Valentiny, T.
Powiązania:
https://bibliotekanauki.pl/articles/406075.pdf
Data publikacji:
2018
Wydawca:
Politechnika Częstochowska
Tematy:
e-shop
online shoppers
preferences
payment method
cash-on-delivery
e-sklep
klienci online
preferencje
sposób płatności
gotówka przy odbiorze
Opis:
In recent years, there is a significant expansion of online-shopping which creates the need for a thorough marketing analysis of online customer behavior. The study examines the factors influencing Italian online shoppers’ preferences of a particular payment method, precisely, it investigates the use of cash-on-delivery as a preferred payment method among Italian online shoppers. We consider both the impact of online shopping trends of the population and the impact of the determinants affecting e-shop preferences on cash-on-delivery preference while shopping online. Research based on primary data obtained through a self-administered questionnaire among Italian online shoppers revealed that improving e-shop’s reputation and online support leads to a decrease in the probability of using cash-on-delivery as a payment method.
W ostatnich latach obserwuje się znaczną ekspansję zakupów online, co wymaga dokładnej analizy marketingowej zachowań klientów online. W badaniu przeanalizowano czynniki wpływające na preferencje włoskich klientów internetowych dotyczące konkretnej metody płatności, a dokładnie analizowano wykorzystanie płatności gotówkowych jako preferowanej metody płatności wśród włoskich kupujących online. Uwzględniono zarówno wpływ trendów zakupowych online, jak i wpływ czynników określających preferencje sklepów internetowych na preferencje dotyczące gotówki przy dostawie podczas zakupów online. Badania oparte na danych pierwotnych uzyskanych za pomocą samodzielnie przeprowadzonego kwestionariusza wśród włoskich kupujących online wykazały, że poprawa reputacji e-sklepu i obsługi online prowadzi do zmniejszenia prawdopodobieństwa użycia metody płatności za pobraniem jako metody płatności.
Źródło:
Polish Journal of Management Studies; 2018, 18, 2; 245-258
2081-7452
Pojawia się w:
Polish Journal of Management Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Frequency Offset Compensation for OFDM Systems Using a Combined Autocorrelation and Wiener Filtering Scheme
Autorzy:
Ramadan Ali, A.
Khanzada, T. J.
Omar, A.
Powiązania:
https://bibliotekanauki.pl/articles/308065.pdf
Data publikacji:
2010
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
channel characterization
frequency offset
OFDM measurement
Wiener filtering
Opis:
One of the orthogonal frequency division multiplexing (OFDM) system disadvantages is its sensitivity to frequency offset and phase noise, which lead to losing the orthogonality between the subcarriers and thereby degrade the system performance. In this paper a joint scheme for frequency offset and pilot-based channel estimation is introduced in which the frequency offset is first estimated using an autocorrelation method, and then is fined further by applying an iterative phase correction by means of pilot-based Wiener filtering method. In order to verify the capability of the estimation algorithm, the scheme has been implemented and tested using a real measurement system in a multipath indoor environment. The results show the algorithm capability of compensating for the frequency offset with different transmission and channel conditions.
Źródło:
Journal of Telecommunications and Information Technology; 2010, 1; 40-47
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phytoextraction of Cr by maize (Zea mays L.) : the role of plant growth promoting endophyte and citric acid under polluted soil
Autorzy:
Ali, J.
Mahmood, T.
Hayat, K.
Afridi, M. S.
Ali, F.
Chaudhary, H. J.
Powiązania:
https://bibliotekanauki.pl/articles/204568.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
maize
phytoextraction
chromium
citric acid
Burkholderia vietnamiensis
Opis:
High chromium (Cr) toxicity has turned into a serious environmental concern. Cr contaminated agronomic soils negatively affect the growth and yield of crops. Current research was conducted to enhance the phytoextraction potential of maize by using Burkholderia vietnamiensis and citric acid (CA). Plants were subjected to three concentrations of Cr (0.86, 350, and 500 ppm). A pot experiment was conducted under greenhouse conditions with completely randomized design (CRD). After 72 days of experiment, plants were harvested to analyze the morphological and biochemical attributes of soil, bacteria and plant. Results revealed that plant fresh, dry biomass, root, shoot length and chlorophyll contents significantly increased by 56%, 50%, 58%, 78% and 60%, respectively, at 500 ppm Cr concentration in combine treatment of B. vietnamiensis and CA. Maize plants treated with both B. vietnamiensis and CA significantly increased the bioaccumulation (BA) of Cr up to 50% and translocation factor (TF) by 31%. Furthermore, superoxide dismutase (SOD), proline and peroxidase dismutase (POD) activities in leaves were markedly increased by 30%, 42% and 15%, respectively, when treated with CA. Current study reveals that exogenous co-application of B. vietnamiensis + CA enhance plant growth by alleviating heavy metal stress and accelerate the phytoextraction of Cr. Taking into account the heavy metal tolerance and accumulation capacity, Zea mays is suitable for phytoremediation of contaminated soils in combination with B. vietnamiensis and CA.
Źródło:
Archives of Environmental Protection; 2018, 44, 2; 73-82
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Water supply performance evaluation of the public service of drinking water Case study: East of Algeria
Ocena działania publicznych służb zaopatrzenia w wodę pitną – przykład wschodniej Algierii
Autorzy:
Boutebba, Khereddine
Bouamrane, Ali
Ganaoui, Nawel
Bouziane, Mohamed T.
Powiązania:
https://bibliotekanauki.pl/articles/293270.pdf
Data publikacji:
2019
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
correspondence factor analysis (CFA)
GIS
performance evaluation
public service
survey
ankieta
czynnikowa analiza korespondencji (CFA)
ocena działania
usługi publiczne
Opis:
This article presents the results of a survey using a questionnaire conducted in Algeria, to evaluate the quality of public drinking water service, and at the same time the level of dissatisfaction / satisfaction of the subscribers. A statistical analysis of the data has been conducted on a representative sample of general population to identify weaknesses and strengths related to the current state of water management. The assessment of the quality of service, and the quality of water, as well as the price of water under the influence of the geographical distribution of the population was also studied. The results of the statistical analyses show a wide variability regarding the level of dissatisfaction/satisfaction of the subscribers. In order to simplify the interpretation, we gathered the results in the form of classes and groups in such way that the cities appear on GIS mapping software, with their inhabitants’ degree of satisfaction.
W artykule przedstawiono wyniki ankiety przeprowadzonej w Algierii metodą kwestionariuszy celem oceny jakości usług publicznego zaopatrzenia w wodę, a tym samym satysfakcji/niezadowolenia ankietowanych. Statystyczną analizę danych przeprowadzono na reprezentatywnej próbie generalnej populacji, aby określić mocne i słabe strony bieżącego stanu gospodarki wodnej. Przeprowadzono także ocenę jakości usług, jakości wody i ceny wody w odniesieniu do geograficznego rozmieszczenia ludności. Wyniki analiz statystycznych wskazują na duże zróżnicowanie poziomu satysfakcji/niezadowolenia ankietowanych. Aby uprościć interpretację, zebrano wyniki w postaci grup i klas w taki sposób, że miasta pojawiają się w graficznym programie GIS wraz z poziomem satysfakcji ich mieszkańców.
Źródło:
Journal of Water and Land Development; 2019, 40; 53-58
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis and Simulation Performance of a Reverse Osmosis Plant in the Al-Maqal Port
Autorzy:
Yousif, Yasameen T.
Abbas, Abdulhussain A.
Yaseen, Dina Ali
Powiązania:
https://bibliotekanauki.pl/articles/2086424.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
reverse osmosis
Iraq
Basrah
Shatt Al-Arab
TDS
total dissolved solids
Winflows
Opis:
The Basrah province (southern of Iraq) was interested in establishing desalination plants to provide drinking water due to the high levels of salinity in its water resources. This work was carried out in order to evaluate and simulate the functionality of the reverse osmosis plant in the Al-Maqal port. From the field and laboratory measurement, this study concluded that the considered parameters of product water by reverse osmosis (RO) plant were within the Iraqi standard (IRS) limits. The calculation of operation indices showed that the recovery rate of plant (72%) and the permeate flux of plant (20 lmh) was within for limitation of brackish surface water. In turn, the plant has a low salt rejection (90.1%) and a high pressure drop (5 bar); therefore, the membranes require backwashing or chemical cleaning. Then, the performance of RO membrane was simulated by the Winflows software. The best operating parameters were identified. The coefficient of determination (R2) between simulated and measured TDS was 0.83. Therefore, the simulated TDS of permeate multiplied by 5.3 was given a good estimation for actual TDS within acceptable an error rate of 17%.
Źródło:
Journal of Ecological Engineering; 2022, 23, 5; 173--186
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Building International Capacity in Mining Engineering: The NUST-WITS Mining Educational Collaboration
Budowanie międzynarodowego potencjału w inżynierii górniczej: współpraca edukacyjna NUST-WITS w dziedzinie górnictwa
Autorzy:
Cawood, Frederick T.
Ali, Sarfraz
Ashraf, Hamid
Feroze, Tariq
Powiązania:
https://bibliotekanauki.pl/articles/318012.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
university collaboration
Pakistan mining
South African mining
capacity building
twenty-first century mining
współpraca międzyuczelniana
górnictwo w Pakistanie
górnictwo w RPA
budowanie zdolności
górnictwo XXI wieku
Opis:
Pakistan has not developed its mining sector to its full potential. This is despite its quality mineral resources. Mining in Pakistan is mostly ‘artisanal’ and ‘small-scale’, and for this to change, the country must develop the skills to support a flourishing formal sector of significance in the twenty-first century. Pakistan has good quality universities with some of them already providing courses in mining. Building on this platform, NUST University approached the School of Mining Engineering at the University of the Witwatersrand (Wits Mining) in 2011 to start a collaboration that will result in greater sector benefit for Pakistan. The outcome of the discussions was to do capacity building for mining professionals in Pakistan at postgraduate and post-doctorate levels. The approach used was to identify university staff requirements to support a teaching, learning and research programme for a 21st century mining sector and then to match these with the qualifications of the lecturers who were identified to deliver the programme at NUST. The collaboration has proved to be successful because of leadership, energy and carefully selected ‘champions’ on both sides. One of the many highlights of the collaboration was the establishment of an excellent laboratory doing research on how the fourth industrial revolution is affecting the mining sector. The Digital Mining Project formed the core of the research, and it still allows for regular exchanges of students, staff and post-doctorates on a consistent research theme.
Pakistan nie rozwinął w pełni swojego sektora wydobywczego. Dzieje się tak pomimo wysokiej jakości zasobów mineralnych. Górnictwo w Pakistanie jest głównie „rzemieślnicze” i „na małą skalę”, a aby to się zmieniło, kraj ten musi rozwinąć umiejętności, aby wspierać kwitnący sektor formalny o znaczeniu w XXI wieku. Pakistan ma wysokiej jakości uniwersytety, a niektóre z nich już oferują kursy górnicze. Opierając się na tej platformie, NUST University zwrócił się w 2011 roku do School of Mining Engineering na University of the Witwatersrand (Wits Mining), aby rozpocząć współpracę, która przyniesie większe korzyści sektorowe dla Pakistanu. Wynikiem dyskusji było budowanie potencjału specjalistów górnictwa w Pakistanie na poziomie studiów podyplomowych i podyplomowych. Zastosowano podejście, które polegało na zidentyfikowaniu wymagań personelu uniwersyteckiego w zakresie wspierania programu nauczania, uczenia się i badań dla sektora górniczego XXI wieku, a następnie powiązaniu ich z kwalifikacjami wykładowców, którzy zostali wyznaczeni do realizacji programu na NUST. Współpraca okazała się udana dzięki przywództwu, energii i starannie dobranym „czempionom” po obu stronach. Jedną z wielu atrakcji współpracy było utworzenie doskonałego laboratorium prowadzącego badania nad wpływem czwartej rewolucji przemysłowej na sektor górniczy. Projekt Digital Mining stanowił rdzeń badań i nadal umożliwia regularną wymianę studentów, pracowników i doktorantów w ramach spójnego tematu badawczego.
Źródło:
Inżynieria Mineralna; 2020, 1, 2; 311-322
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation of Suspended Sediment Load Using Artificial Neural Network in Khour Al Zubair Port, Iraq
Autorzy:
Hassan, Ayman A.
Ibrahim, Husham T.
Al-Aboodi, Ali H.
Powiązania:
https://bibliotekanauki.pl/articles/24201740.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
suspended sediment concentration
multilayer perceptron
neural network
Khour Al-Zubair port
Basrah city
Opis:
The port of Khour Al-Zubair is located 60.0 km south of the city centre of Basrah; it is also located 105.0 kilometres from the northern tip of the Arabian Gulf. The main goal of this paper is to estimate the concentration of suspended deposit (SSC) in “Khour Al-Zubair” port using a Multilayer Perceptron Neural Network (MLP) based on hydraulic and local boundary parameters while also studying the effect of these parameters on estimating the SSC. Five input parameters (channel width, water depth, discharge, cross-section area, and flow velocity) are used for estimating SSC. Different input hydraulic and local boundary parameter combinations in the three sections (port center, port south, and port north) were used for creating nine models. The use of both hydraulic and local boundary parameters for SSC estimation is very important in the port area for estimating sediment loads without the need for field measurements, which require effort and time.
Źródło:
Journal of Ecological Engineering; 2023, 24, 6; 54--64
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Batch and Continuous Photo-Fenton Oxidation of Reactive-Red Dye from Wastewater
Autorzy:
Hassan, Ali A.
AlJaberi, Forat Yasir
Al-Khateeb, Raid T.
Powiązania:
https://bibliotekanauki.pl/articles/2025725.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
dye
wastewater treatment
advanced oxidation process
central composite design
optimization
Opis:
This paper aims to investigate the ability of photo-Fenton technology to remove Reactive Red dye (RR-dye) from wastewater using batch and continuous operating modes. The batch mode of photo-Fenton removal of organic content was conducted under the influence of solution pH (3–10), hydrogen peroxide (25–100 ppm), irradiation time (20–90 min), ferrous sulphate (5–20 ppm), and temperature (25–60 °C). For comparison, the continuous treatment was conducted under the influence of the flow rate of the contaminated solution (10, 20, 30, 40, and 50 mL/min). The results revealed that the treatability of the batch mode was more effective compared to the continuous mode. In the batch process, the organic contaminant was completely removed compared to that of 82% obtained when the continuous system was performed. The optimization process showed that the optimal values of the operating variables in the case of the batch removal of RR-dye were 3, 78 ppm, 90 min, 20 ppm, and 60 °C for pH, hydrogen peroxide, irradiation time, ferrous sulphate, and temperature, respectively. Moreover, the reversion F-value was 21.69, the probability P value was less than 0.001, and the correlation coefficient was (R2 = 0.9455), which illustrative the significance of the model obtained for the batch process.
Źródło:
Journal of Ecological Engineering; 2022, 23, 1; 14-23
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preliminary investigations of rocks and soil at the lower reach of Al-Shor Wadi for water harvesting
Autorzy:
Al-Naqib, Salim Q.
Sulaiman, Ali M
Al-Youzbakey, Kotayba T.
Powiązania:
https://bibliotekanauki.pl/articles/1064782.pdf
Data publikacji:
2020
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
water investigations
Al-Shor Wadi
water harvesting
Mosul
dams
Opis:
The last four decades weather forecasting data marks the precipitation declination and increase dry years, in addition to the desertification migration on the west and northwestern Mosul city. This led to studying the Al-Shor Wadi area to try to make use of the karstic spring water flow through it and to harvest the rainfall flow water. These need to select the best site to construct a dam taking into consideration the geological and geotechnical characteristics of both dam site and lake behind. The dam site appears to be appropriate relying on the large thickness and frequencies of the marl bed, the restriction of gypsum bed thicknesses and frequencies as well as, of the approximate nill karstification.
Źródło:
Scientific Review Engineering and Environmental Sciences; 2020, 29, 4; 435-443
1732-9353
Pojawia się w:
Scientific Review Engineering and Environmental Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Qualifying the geotechnical and hydrological characteristic of the Bandawaya stream valley - Northern Iraq
Autorzy:
Al-Jawadi, Azealdeen S.
Abdul Baqi, Yousra T.
Sulaiman, Ali M
Powiązania:
https://bibliotekanauki.pl/articles/118661.pdf
Data publikacji:
2020
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
geotechnical characteristic
hydrology
Bandawaya
dam
stream valley
Northern Iraq
Opis:
In northern Iraq, countless non-abuse stream valleys can be used to store water for a variety of purposes; domestic, supplementary irrigation, and recharging groundwater. Bandawaya is one of the stream valleys, which form the first perspective has excellent quality. The location of the suggested dam has been evaluated by hydrological and geotechnical studies. Geotechnical studies included measurement of all the parameters related to the rock mass classification for evaluation based on four classification systems, which are the Q-System, the rock mass rating (RMR), the geological strength index (GSI), and the rock mass index (RMi). The classification results indicated that the rocks of the valley are good for constructing a dam on them, with some weak zones that may affect the integrity of the dam, which the study recommended treating before starting the construction of the dam. According to preliminary studies on different dam’s heights the qualification demonstrates an excellent choice of the site. Four stream orders are recognized, dendritic pattern in the southern part of the watershed, and trellised in the northern part. Three heights assumed to the proposed dam 450, 460, 470 m a.s.l. with 640,764; 3429,787; 8,590,763 m3 storage capacity respectively. According to the Q-System, the RMR, the GSI, and the RMi, the rock mass of the study area is evaluated. The findings illustrate the excellent selection by geotechnical, hydrological, and engineering features of the dam place.
Źródło:
Scientific Review Engineering and Environmental Sciences; 2020, 29, 3; 319-331
1732-9353
Pojawia się w:
Scientific Review Engineering and Environmental Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The meaning of physical activity in the quality of life management aspect
Autorzy:
Rosak-Szyrocka, Joanna
Clark, Cain C. T.
Abbas, Ali Abdulhassan
Ullah, Irfan
Powiązania:
https://bibliotekanauki.pl/articles/104063.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
quality of life
management
health activity
sport
running
jakość życia
zarządzanie
aktywność zdrowotna
bieganie
Opis:
Quality of life is an ambiguous concept with a medical, sociological and economic dimension, as well as psychological, the most subjective one. Physical activity is considered one of the most important elements of a healthy lifestyle and a factor that determines the physical and mental health of an individual. The article presents the issue of physical activity in the aspect of quality of life management. It was found that respondents notice a very large relationship between sport and quality of life. The authors showed that it is very important in the quality of life management aspect not only to promote physical culture, but also to develop the habit of practicing it.
Źródło:
Quality Production Improvement - QPI; 2020, 2, 1; 69-76
2657-8603
Pojawia się w:
Quality Production Improvement - QPI
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
In vitro propagation of Althaea officinalis: the role of plant growth regulators in morphogenesis
Autorzy:
Mujib, A.
Pipal, T.
Ali, M.
Tonk, D.
Zafar, N.
Gulzar, B.
Powiązania:
https://bibliotekanauki.pl/articles/79918.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Althaea officinalis
marshmallow
in vitro propagation
clonal multiplication
2,4-dichlorophenoxyacetic acid
plant growth regulator
morphogenesis
rooting
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2017, 98, 3
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of Triangular Core Rotation of a Hybrid Porous Core Terahertz Waveguide
Autorzy:
Ali, S.
Ahmed, N.
Alwee, S.
Islam, M.
Rana, S.
Bhuiyan, T.
Powiązania:
https://bibliotekanauki.pl/articles/227154.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
porous core waveguide
THz waveguide
flat EML
hybrid design
flat dispersion
triangular design
core rotation
Opis:
In this paper, we investigate the effects for rotating the triangular core air hole arrangements of a hybrid design porous core fiber. The triangular core has been rotated in anticlockwise direction to evaluate the impact on different waveguide properties. Effective Material Loss (EML), confinement loss, bending loss, dispersion characteristics and fraction of power flow are calculated to determine the impacts for rotating the triangular core. The porous fiber represented here has a hybrid design in the core area which includes circular rings with central triangular air hole arrangement. The cladding of the investigated fiber has a hexagonal array of air hole distribution. For optimum parameters the reported hybrid porous core fiber shows a flat EML of ±0.000416 cm⁻¹ from 1.5 to 5 terahertz (THz) range and a near zero dispersion of 0.4±0.042 ps/THz/cm from 1.25 to 5.0 THz. Negligible confinement and bending losses are reported for this new type of hybrid porous core design. With improved concept of air hole distribution and exceptional waveguide properties, the reported porous core fiber can be considered as a vital forwarding step in this field of research.
Źródło:
International Journal of Electronics and Telecommunications; 2017, 63, 1; 25-31
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Carbon Co-Deposition During Gas Reduction of Water-Atomized Fe-Cr-Mo Powder
Autorzy:
Ali, B.
Choi, S. H.
Seo, S. J.
Maeng, D. Y.
Lee, C. G.
Kim, T. S.
Park, K. T.
Powiązania:
https://bibliotekanauki.pl/articles/352709.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
water atomization
Fe-based powder
oxide reduction
powder metallurgy
sinter-hardening alloys
Opis:
The water atomization of iron powder with a composition of Fe-3Cr-0.5Mo (wt.%) at 1600°C and 150 bar creates an oxide layer, which in this study was reduced using a mixture of methane (CH4) and argon (Ar) gas. The lowest oxygen content was achieved with a 100 cc/min flow rate of CH4, but this also resulted in a co-deposition of carbon due to the cracking of CH4. This carbon can be used directly to create high-quality, sinter hardenable steel, thereby eliminating the need for an additional mixing step prior to sintering. An exponential relationship was found to exist between the CH4 gas flow rate and carbon content of the powder, meaning that its composition can be easily controlled to suit a variety of different applications.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 2B; 1119-1124
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of chlortetracycline and sulfapyridine antibiotics on soil enzyme activities
Autorzy:
Molaei, Ali
Lakzian, Amir
Datta, Rahul
Haghnia, Gholamhosain
Astaraei, Alireza
Rasouli-Sadaghiani, MirHassan
T. Ceccherini, Maria
Powiązania:
https://bibliotekanauki.pl/articles/972897.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
alkaline phosphatase
chlortetracycline
dehydrogenase
sulfapyridine
urease
Opis:
Pharmaceutical antibiotics are frequently used in the livestock and poultry industries to control infectious diseases. Due to the lack of proper guidance for use, the majority of administrated antibiotics and their metabolites are excreted to the soil environment through urine and feces. In the present study, we used chlortetracycline and sulfapyridine antibiotics to screen out their effects on dehydrogenase, alkaline phosphatase and urease activity. Factorial experiments were conducted with different concentrations of antibiotic (0, 10, 25 and 100 mg kg-1 of soil) mixed with soil samples, and the enzyme activity was measured at intervals of 1, 4 and 21 days. The results show that the chlortetracycline and sulfapyridine antibiotics negatively affect the dehydrogenase activity, but the effect of sulfapyridine decreases with time of incubation. Indeed, sulfapyridine antibiotic significantly affect the alkaline phosphatase activity for the entire three-time interval, while chlortetracycline seems to inhibit its activity within 1 and 4 days of incubation. The effects of chlortetracycline and sulfapyridine antibiotics on urease activity appear similar, as they both significantly affect the urease activity on day 1 of incubation. The present study concludes that chlortetracycline and sulfapyridine antibiotics have harmful effects on soil microbes, with the extent of effects varying with the duration of incubation and the type of antibiotics used.
Źródło:
International Agrophysics; 2017, 31, 4
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-25 z 32

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