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Wyświetlanie 1-15 z 134
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:
The Effect of Natural Silica from Rice Husk Ash and Nickel as a Catalyst on the Hydrogen Storage Properties of $MgH_2$
Autorzy:
Malahayati, -
Yufita, Evi
Ismail, Ismail
Mursal, Mursal
Idroes, Rinaldi
Jalil, Zulkarnain
Powiązania:
https://bibliotekanauki.pl/articles/2028172.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
hydrogen storage
natural silica
rice husk ash
high energy ball milling
desorption temperature
Opis:
The characteristics of $MgH_2$ as a hydrogen storage material in this study were observed by varying the composition of the catalyst. The added catalyst was a dual catalyst, namely nickel and natural silica extracted from rice husk ash with a composition of $MgH_2$ + 10 wt% $SiO_2$ + 10 wt% Ni (Sample A), then $MgH_2$ + 5 wt% $SiO_2$ + 10 wt% Ni (Sample B) , and $MgH_2$ + 10 wt% $SiO_2$ + 5 wt% Ni (sample C). The samples were prepared using the high energy ball milling (HEBM). The results showed that the natural silica extracted from rice husk ash (hereafter called “RHA“) can be used as a catalyst in $MgH_2$. Then, simultaneous use of nickel with silica as dual catalyst has shown the improvement in the hydrogen storage characteristics such as temperature and desorption time. The results of this study also indicate that the composition of the catalyst affects the particle size, although the time and milling treatment are the same. Furthermore, the particle size affects the characteristics of $MgH_2$ as a hydrogen storage material. Apart from particle size, there are other parameters that influence the characteristics of $MgH_2$, which appear during the sample preparation process such as impurity and agglomeration phases, all of which are closely related to the composition and type of catalyst used and the milling treatment applied to the sample. The 10 hours milling time used in this study has succeeded in reducing the sample to nano size. The Mg-based materials which have a nanostructure will have a larger contact area for the hydrogen reaction. The diffusion distance during the hydrogen absorption reaction also becomes smaller so as to improve the kinetic and thermodynamic characteristics of $MgH_2$.
Źródło:
Journal of Ecological Engineering; 2021, 22, 11; 79-85
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Orderings and preorderings in rings with involution
Autorzy:
Idris, Ismail
Powiązania:
https://bibliotekanauki.pl/articles/965823.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Opis:
The notions of a preordering and an ordering of a ring R with involution are investigated. An algebraic condition for the existence of an ordering of R is given. Also, a condition for enlarging an ordering of R to an overring is given. As for the case of a field, any preordering of R can be extended to some ordering. Finally, we investigate the class of archimedean ordered rings with involution.
Źródło:
Colloquium Mathematicum; 2000, 83, 1; 15-20
0010-1354
Pojawia się w:
Colloquium Mathematicum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
USING ONLINE FACILITATION TO ENCOURAGE STUDENT PARTICIPATION IN COLLABORATIVE PROJECTS ONLINE: GOOD DEEDS IEARN PROJECT IN ACTION
Autorzy:
Fayed, Ismail
Powiązania:
https://bibliotekanauki.pl/articles/941183.pdf
Data publikacji:
2006
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej w Lublinie. IATEFL Poland Computer Special Interest Group
Opis:
Encouraging student participation in meaningful online collaborative projects is important in the learning process since it involves students in practical, hands-on experiences and raises their awareness of issues related to their local societies and/or educational needs. Although the use of online educational interaction still poses many challenges, it also provides outstanding learning outcomes. This paper describes the outcomes of an ongoing iEARN ( http://www.iearn.org/ ) project that uses a variety of blended learning techniques. Included are summaries of technical requirements, pedagogical and technological methods, and achievements, plus comments on feedback and expected outcomes for future action plans.
Źródło:
Teaching English with Technology; 2006, 6, 3
1642-1027
Pojawia się w:
Teaching English with Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparative empirical analysis of voter behavior 2012 and 2016 US elections
Autorzy:
Tahir, Ismail
Powiązania:
https://bibliotekanauki.pl/articles/2049784.pdf
Data publikacji:
2021
Wydawca:
Instytut Studiów Międzynarodowych i Edukacji Humanum
Tematy:
Campaigns
Election
Voters
Candidate
Party
Opis:
The analysis focuses on similarities and differences of behavior exhibited by voters in the 2012 and 2016 US elections with verification from empirical sources. The analysis has revealed the use of internet in both elections as well as the mobilization of certain groups of voters including Latinos, women, and working class. Social classes are also revealed to also have effect on the election due to the varying response by the groups during elections. The analysis of the two elections is not ample to come up with a decisive conclusion on the behavior of voters during elections in regard to their reaction to the political and other factors involved.
Źródło:
Humanum. Międzynarodowe Studia Społeczno-Humanistyczne; 2021, 2(41); 105-109
1898-8431
Pojawia się w:
Humanum. Międzynarodowe Studia Społeczno-Humanistyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Independent transversal domination in graphs
Autorzy:
Hamid, Ismail
Powiązania:
https://bibliotekanauki.pl/articles/743635.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
dominating set
independent set
independent transversal dominating set
Opis:
A set S ⊆ V of vertices in a graph G = (V, E) is called a dominating set if every vertex in V-S is adjacent to a vertex in S. A dominating set which intersects every maximum independent set in G is called an independent transversal dominating set. The minimum cardinality of an independent transversal dominating set is called the independent transversal domination number of G and is denoted by $γ_{it}(G)$. In this paper we begin an investigation of this parameter.
Źródło:
Discussiones Mathematicae Graph Theory; 2012, 32, 1; 5-17
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Factors That Influenced the 2016 US Presidential Elections
Autorzy:
Tahir, Ismail
Powiązania:
https://bibliotekanauki.pl/articles/2049785.pdf
Data publikacji:
2021
Wydawca:
Instytut Studiów Międzynarodowych i Edukacji Humanum
Tematy:
epending
employs
elections
goverments
democratics
Opis:
This paper analyzes the economic factors that influenced the 2016 US presidential elections. One of the significant factor of the economy that affected the lections is the economic growth that the coun- try experienced that year. After much research it is found that economic factors including unemploy- ment and rates of inflation have reduced influence on elections.
Źródło:
Humanum. Międzynarodowe Studia Społeczno-Humanistyczne; 2021, 2(41); 97-103
1898-8431
Pojawia się w:
Humanum. Międzynarodowe Studia Społeczno-Humanistyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geochemistry of the Igdekoy-Doganlar Na-Ca borate deposit, Emet Province (western Anatolia, Turkey)
Autorzy:
Koçak, İsmail
Powiązania:
https://bibliotekanauki.pl/articles/2060268.pdf
Data publikacji:
2020
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
REE
trace element
borate
mineralogy
ulexite
probertite
Opis:
Borates at the Igdekoy-Doganlar locality were deposited in a Miocene lacustrine environment during periods of Paleogene to Early Quaternary volcanic activity. The mineral paragenesis consists of probertite – NaCaB5O7(OH)4 3H2O, ulexite - NaCa[B5O6(OH)6] · 5H2O, hydroboracite - CaMg[B3O4(OH)3]2 3H2O, colemanite - Ca[B3O4(OH)3] · H2O, halite, anhydrite, glauberite, smectite and illite. The major element, Ca, is higher in the lgdekoy-Doganlar deposits compared to the averages for andesite and the Earth's crust. Within the trace elements, notable enrichment is identified in Li, Se, As, Sb, Sr and Cs. Lithium and Se occur in sufficient concentrations to be considered as economically valuable by-products. B and Sr anomalies can be used as an important marker in the exploration for boron deposits. The Y/Ho ratio of the lgdekoy-Doganlar borates is close to chondritic values. The negative Ce anomaly in borates from the lgdekoy-Doganlar deposit suggests that deposition occurred under oxidative conditions. The Eu and Ce anomalies reflect a hydrothermal contribution of REE. Geochemical and geological data suggest that the lgdekoy-Doganlar borate deposits were formed in high-pH playa lakes that were discharged from volcanic and terrestrial environments under evaporative conditions due to the effect of arid-semi arid climate.
Źródło:
Geological Quarterly; 2020, 64, 3; 807--817
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Finite element model updating of reinforced concrete beams with honeycomb damage
Autorzy:
Ismail, Z.
Powiązania:
https://bibliotekanauki.pl/articles/230829.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
parametr uszkodzenia
model elementów skończonych
plaster miodu
uaktualnienie
moduł Younga
damage parameter
finite element model
honeycombing
updating
Young's modulus
Opis:
A method of detecting honeycombing damage in a reinforced concrete beam using the finite element model updating technique was proposed. A control beam and two finite element models representing different severity of damage were constructed using available software and the defect parameters were updated. Analyses were performed on the finite element models to approximate the modal parameters. A datum and a control finite element model to match the datum test beams with honeycombs were prepared. Results from the finite element model were corrected by updating the Young’s modulus and the damage parameters. There was a loss of stiffness of 3% for one case, and a loss of 7% for another. The more severe the damage, the higher the loss of stiffness. There was no significant loss of stiffness by doubling the volume of the honeycombs.
Źródło:
Archives of Civil Engineering; 2012, 58, 2; 135-151
1230-2945
Pojawia się w:
Archives of Civil Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
BEHIND THE SCENE: STUDENT-CREATED VIDEO AS A MEANING-MAKING PROCESS TO PROMOTE STUDENT ACTIVE LEARNING
Autorzy:
Anas, Ismail
Powiązania:
https://bibliotekanauki.pl/articles/569347.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej w Lublinie. IATEFL Poland Computer Special Interest Group
Tematy:
student-created video
meaning-making process
active learning
ELL
Opis:
Although many studies reported that student-created video task could promote learners’ active learning and engagement, the investigation on how the students worked and created the videos is still scarce. The process of video creation in a micro-reality context of English language learning involves social practice and cognition (a socio-cognitive process) of the students. The student-created video is an output-based learning activity that reflects a meaning-making process upon the completion of the project. This paper sheds light on how the students worked on the project through such stages as preparing the materials, setting the scene, selecting the video recording tool and editing the video before the submission. Encapsulated from the videos and semi-structured interviews from 41 Polytechnic students in Indonesia, the approaches that students employed during the process of video creation were explored to arrive at a meaning-making process of learning. As a result, the activity enabled the student active learning, vocabulary building, autonomous learning and self-confidence as well as the student’s technological skill. In addition to that, the challenges encountered by the students during the video-making process will also be presented.
Źródło:
Teaching English with Technology; 2019, 19, 4; 37-56
1642-1027
Pojawia się w:
Teaching English with Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wiki moderators’ contributions to enhance the pedagogical implementation of Wiki
Autorzy:
ISMAIL, NASHWA
Powiązania:
https://bibliotekanauki.pl/articles/628831.pdf
Data publikacji:
2013
Wydawca:
Fundacja Pro Scientia Publica
Tematy:
wiki, constructivism, pedagogy, collaboration, engagement, moderator
Opis:
Wiki has proved extensively that it is an innovative technology situated among other so-cial network applications, because it enables its users to develop web content collaboratively, thereby making it open to all online users. The pedagogical use of Wiki is still in early stages; for this reason a lot of academic research has highlighted the lack of investigation into the pe-dagogical use of Wiki as a tool for collaborative learning. This paper investigates Wiki by fo-cusing on its advantages and disadvantages for the learning process, while highlighting how Wiki moderators can contribute by embedding Wiki successfully into the learning process.
Źródło:
Journal of Education Culture and Society; 2013, 4, 2; 192-199
2081-1640
Pojawia się w:
Journal of Education Culture and Society
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The automatic focus segmentation of multi-focus image fusion
Autorzy:
Hawari, K.
Ismail
Powiązania:
https://bibliotekanauki.pl/articles/2173548.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
deep learning
ResNet50
multifocus image fusion
głęboka nauka
wieloogniskowa fuzja obrazu
Opis:
Multi-focus image fusion is a method of increasing the image quality and preventing image redundancy. It is utilized in many fields such as medical diagnostic, surveillance, and remote sensing. There are various algorithms available nowadays. However, a common problem is still there, i.e. the method is not sufficient to handle the ghost effect and unpredicted noises. Computational intelligence has developed quickly over recent decades, followed by the rapid development of multi-focus image fusion. The proposed method is multi-focus image fusion based on an automatic encoder-decoder algorithm. It uses deeplabV3+ architecture. During the training process, it uses a multi-focus dataset and ground truth. Then, the model of the network is constructed through the training process. This model was adopted in the testing process of sets to predict the focus map. The testing process is semantic focus processing. Lastly, the fusion process involves a focus map and multi-focus images to configure the fused image. The results show that the fused images do not contain any ghost effects or any unpredicted tiny objects. The assessment metric of the proposed method uses two aspects. The first is the accuracy of predicting a focus map, the second is an objective assessment of the fused image such as mutual information, SSIM, and PSNR indexes. They show a high score of precision and recall. In addition, the indexes of SSIM, PSNR, and mutual information are high. The proposed method also has more stable performance compared with other methods. Finally, the Resnet50 model algorithm in multi-focus image fusion can handle the ghost effect problem well.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 1; e140352, 1--8
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Jurassic and Cretaceous evolution of Tethys: Palaeoceanographic events
Autorzy:
Yilmaz, İsmail Ömer
Powiązania:
https://bibliotekanauki.pl/articles/24202104.pdf
Data publikacji:
2023
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
Tethys
Cretaceous
Jurassic
Opis:
Jurassic and Cretaceous evolution of Tethys Ocean is characterized by extension of oceans basins, rifting, development of carbonate platforms and sea level fluctuations. Ocean basins and platform margins were sides of records of collaboration of oceanic, sea level and climate changes in different scales. Deposition of organic sediment increased on the margins of the ocean basins at certain time intervals due to changes in oceanic circulation and chemistry, productivity, climate and sea level. Oceanic Anoxic Events (OAE) stated to took place at aperiodic time intervals and generally associated with organic matter deposits and anoxic water columns. Records of oceanic anoxic event can also be associated by potential source rocks in Jurassic and Cretaceous along Tethys Ocean basins and can be tracked by stable isotope shifts, turnover of fossil groups, presence of black shales/organic rich mudstones, change in redox sensitive elements. Volcanic contribution in oceans is also considered as one of the collaborators of OAE generations. OAE records in Jurassic is seen in Toarcian interval and stated as Toarcian OAE. In Cretaceous, OAE records can be stated as Weissert, Faraoni, Selli (OAE1a), Noir, Fallot, Jacop, Kilian, Paquier (OAE1b), Leenhardt, Amadeus (OAE1c), Breistroffer (OAE1d), Bonarelli (OAE2), and OAE3. Generally, Cretaceous OAE are globally correlated or at least hemispherical. Some of them can be weakly correlated due to different duration and magnitude. Stratigraphic positions of OAE can also be used better marker levels in sequence stratigraphic interpretations. Therefore, positions of OAE are very important in terms of higher resolution for platform to basin correlations and even basin to basin. Cretaceous Oceanic Anoxic Events in eastern Tethys Ocean in Pontides and Taurides can be seen in Cretaceous successions (Mid-Barremian, Aptian, Albian, Cenomanian-Turonian) of Central Pontides (NW Turkey) and Central Taurides (S Turkey) (Yilmaz et al., 2004, 2010, 2012) as presence of black shales. The Mid-Barremian black shales (MBE) have been recorded within turbidite succession in deep marine setting in central Sakarya zone of Pontides following the drowning of the platform (Yilmaz et al., 2012). 2‰ shifts in carbon isotope curve is recorded in parallel with European basins, but with low TOC value. The Aptian black shales (OAE1a) are recorded in pelagic carbonate slope environments in central and north of Sakarya zone of Pontides and represented by a negative carbon isotope shift with 2‰, and TOC around 2% (Yilmaz et al., 2004; Hu et al., 2012). In Sakarya zone of Pontides, OAE2 is recorded in pelagic slope carbonates with carbon isotope curve more than 1‰ positive shift and >2% TOC. Another OAE2 was recorded in Antalya Nappes of Taurides without carbon isotope curve but TOC > 20% (Yurtsever et al., 2003, Bozcu et al., 2011). OAE1a equivalent in Tauride Carbonate platform can be interpreted as presence of dark colored thick stromatolite bearing platform carbonates transgressivley overlying the karstic sequence boundary. The OAE1a and OAE2 levels recorded in Turkey can easily be correlated with European examples and mainly controlled by sea level and tectonics in largescale and climate and oceanographic changes in small-scale. The most extensive distribution of the OAE records in Turkey belong to OAE1a and OAE2, and display potential for source rocks for hydrocarbon exploration.
Źródło:
Geotourism / Geoturystyka; 2023, 1-2 (72-73); 81--81
1731-0830
Pojawia się w:
Geotourism / Geoturystyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphemic analysis increases vocabulary and improves comprehension
Autorzy:
Jarad, Najib Ismail
Powiązania:
https://bibliotekanauki.pl/articles/914944.pdf
Data publikacji:
2015-12-14
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
morphemic analysis
reading comprehension
explicit teaching
vocabulary instruction
Opis:
The present study explored the effects of explicit and systematic teaching of morphemic analysis on vocabulary learning and comprehension. The reading class taught by the researcher was purposely taught the most common (30) prefixes and the most common (30) roots. Following fourteen 50-minute lessons, students were tested on their ability to recall the meanings of words used to teach the morphemic analysis skills, to derive meanings for new words that contained taught morphemic elements, and to comprehend text containing new words. The results indicated that (a) there was an immediate and delayed effect of morphemic analysis for lesson words, and (b) there was evidence that a morphemic approach improved students’ vocabulary and, consequently, their comprehension. The findings of this study provide support for the implementation of a morphemic approach for vocabulary instruction.
Źródło:
Glottodidactica. An International Journal of Applied Linguistics; 2015, 42, 2; 31-43
0072-4769
Pojawia się w:
Glottodidactica. An International Journal of Applied Linguistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Remediation technologies of diazinon and malathion residues in aquatic system
Autorzy:
Derbalah, A.
Ismail, A.
Powiązania:
https://bibliotekanauki.pl/articles/207344.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
biotechnology
bioremediation
microorganisms
water pollution
remediation technologies
contaminated water
biotechnologia
bioremediacja
mikroorganizmy
zanieczyszczenie wody
remediacja
techniki remediacyjne
woda zanieczyszczona
Opis:
The study was carried out to evaluate the efficiencies of various remediation technologies (advanced oxidation processes and bioremediation) for removing diazinon and malathion residues from water. Nano photo-Fenton reagent (Fe0(nano)/H2O2AJV) was the most effective treatment for diazinon and malathion removal while ultraviolet alone was the least effective one. Bioremediation of diazinon and malathion by effective microorganisms (EMs) removed about 100% of their initial concentration. There was no remaining toxicity in contaminated water after remediation except for ultraviolet alone on treated rats. Advanced oxidation processes with nanomaterials and bioremediation with effective microorganisms can be regarded as safe and effective remediation technologies.
Źródło:
Environment Protection Engineering; 2013, 39, 3; 135-147
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 134

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