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Wyszukujesz frazę "Mohammed, Omar." wg kryterium: Autor


Tytuł:
Nie znacie dnia : poszukiwany numer 2 na świecie, duchowy przywódca talibów mułła Mohammed Omar, zapowiada w wywiadzie dla rosyjskiego tygodnika zniszczenie Waszyngtonu.
Autorzy:
Mohammed, Omar.
Powiązania:
Forum 2002, nr 25, s. 14
Data publikacji:
2002
Tematy:
Terroryzm
Operacja antyterrorystyczna 2001- w Afganistanie
Interwencja zbrojna w Afganistanie (2001)
Opis:
Tł. art. zamieszcz. w "Argumienty i Fakty". --- 2002, 12 VI.
Dostawca treści:
Bibliografia CBW
Artykuł
Tytuł:
Implementing GIS and linear regression models to investigate partial building failures
Autorzy:
Merza, Alaa Nuri
Raheem, Aram Mohammed
Naser, Ibrahim Jalal
Ibrahim, Mohammed Omar
Omar, Najat Qader
Powiązania:
https://bibliotekanauki.pl/articles/36072623.pdf
Data publikacji:
2023
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
GIS
IDW technique
crack identification
linear single
multi-regression models
Opis:
One of the most dangerous field problems in the civil engineering discipline is the suddenly developed cracks in the building, which could be caused by the swelling of the subsurface soil. Thus, this work has focused on employing a procedure in the geographic information system known as the inverse distance weighted (IDW) technique, to analyze the extent of cracks in a residential complex in the city of Kirkuk in Iraq using the physical and chemical soil data for seven boreholes from the field of the study. Physical soil parameters such as liquid limit (LL), gravel, sand, silt and clay percentages were characterized first, followed by chemical properties such as gypsum content (GYP), total suspended solids (TSS), potential of hydrogen (pH), and organic content (ORG). Furthermore, statistical studies such as plasticity index (PI) and soil characteristics association, linear single, and various linear multi-regression models were used. The data analysis shows that there are significantly positive and negative relationships between PI as a swelling indicator and the physical and chemical soil properties, although weak to moderate correlations were observed between PI and these variables. The PI values were accurately predicted by the proposed linear multi-regression models of the physical and integrated physical and chemical soil characteristics, with multiple R values of 0.92 for both models. As a result, the suggested statistical models can provide complete geographic and mechanical explanations for the crack sources in the investigated residential complex.
Źródło:
Scientific Review Engineering and Environmental Sciences; 2023, 32, 4; 338-356
1732-9353
Pojawia się w:
Scientific Review Engineering and Environmental Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Secondary treated wastewater as a concrete component and its impact on the basic strength properties of the material
Autorzy:
Ahmad, Omar Asad
Ayyad, Sami Mohammed
Powiązania:
https://bibliotekanauki.pl/articles/1853673.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ścieki wtórnie oczyszczone
woda pitna
właściwości mechaniczne
beton
wytrzymałość na rozciąganie
secondary treated wastewater
potable water
mechanical properties
concrete
tensile strength
Opis:
In Jordan, the unprecedented proliferation of building projects is anticipated to increase the potable water demand in the construction manufacturing. In the present work, secondary treated wastewater (STW) and potable water (PW) were used in the production of concrete mixes, which were subjected to testing after 3 to 28 days of curing to determine how the, mechanical properties of concrete was affected by the addition of secondary treated wastewater in various proportions (25-100%). Results indicated that the use of 25% and 75% of secondary treated wastewater in concrete production increased the compressive strength to 39 MPa after 28 days of curing. A more noticeable increment was recorded in tensile strength, which was double that achieved with the standard design. Overall, the compressive strength increased by 21.95% when secondary treated wastewater was used, while the expenditure related to water usage was halved. Furthermore, there was consistency between the results obtained from scaling up to actual ready-mix concrete production and the results of the empirical work.
Źródło:
Archives of Civil Engineering; 2021, 67, 1; 571-583
1230-2945
Pojawia się w:
Archives of Civil Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of sand columns in the reinforcement of weak layers in road engineering
Autorzy:
Ayyad, Sami Mohammed
Ahmad, Omar Asad
Powiązania:
https://bibliotekanauki.pl/articles/1853672.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
kolumna piaskowa
odkształcenie względne
odbudowa
budownictwo drogowe
wzmocnienie
warstwa słaba
sand column
relative deformation
rebuilding
road engineering
reinforcement
weak layer
Opis:
It is an established fact that when roads are planned and constructed, consideration needs to be given to ensuring the strength of the road surface. It is, however, also the case that when an existing road is being rebuilt or is under maintenance, its base may need to be fortified to increase the road’s vehicle-carrying capacity. The base may, for example, contain a high proportion of weak soil that would be difficult, time-consuming, and costly to remove. This paper aims to investigate the efficacy of using sand-filled piles to reduce road deformation. Experiments conducted on sponge samples confirm that there is a relationship between the total area of sand-filled piles and relative reduction in deformation. It finds that the relationship is non-linear, but that the relationship can be made linear by adjusting the area of sand-filled piles. When the area of sand-filled piles increases from 7.8% to 19.4%, the deformation module can change by up to 100%. Relative reduction in deformation can change from 14% to 45.5% when the area of sand-filled piles increases from 7.8% to 11.7%. The maximum reduction in deformation - 92.4% - occurs when the area of sand-filled piles exceeds 19.5%. Changing the loads borne also affects the deformation module. This paper found that when there was a 10 to 15kg load, and the number of sandfilled piles was increased, there was a change in the deformation module by 380-470%. When there was only a 5kg load on the sample, and the number of sand-filled piles was increased, there was a change in the deformation module by up to 1217%.
Źródło:
Archives of Civil Engineering; 2021, 67, 1; 527-538
1230-2945
Pojawia się w:
Archives of Civil Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ɵ(1) Time Algorithm for Master Selection in Ad-hoc Wireless Networks
Autorzy:
Khattabi, Mohammed
Elmesbahi, Jelloul
Khaldoun, Mohammed
Errami, Ahmed
Bouattane, Omar
Powiązania:
https://bibliotekanauki.pl/articles/226674.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cluster-based networks
cluster head selection
ad-hoc networks
wireless sensors networks
SDR
USRP
simulink
Opis:
This paper details a hardware implementation of a distributed Ɵ(1) time algorithm allows to select dynamically the master device in ad-hoc or cluster-based networks in a constant time regardless the number of devices in the same cluster. The algorithm allows each device to automatically detect its own status; master or slave; based on identifier without adding extra overheads or exchanging packets that slow down the network. We propose a baseband design that implements algorithm functions and we detail the hardware implementation using Matlab/Simulink and Ettus B210 USRP. Tests held in laboratory prove that algorithm works as expected.
Źródło:
International Journal of Electronics and Telecommunications; 2020, 66, 3; 521-527
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Enabling Wireless In-band Full-duplex
Autorzy:
Elmesbahi, Jelloul
Khaldoun, Mohammed
Errami, Ahmed
Khattabi, Mohammed El
Bouattane, Omar
Powiązania:
https://bibliotekanauki.pl/articles/226551.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
in-band full-duplex
wireless
USRP
SDR
GNU radio
Opis:
This paper presents a baseband model and an enhanced implementation of the wireless full duplex analog method introduced by [1].Unlike usual methods based on hardware and software self- interference cancelation, the proposed design relies on FSK modulation. The principle is when the transmitter of a local end is sending data by modulating the carrier with the appropriate frequency deviation, its own receiver is checking if the remote transmitter is using the opposite deviation. Instead of architectures often used by both non-coherent and coherent receivers that require one filter (matched filter for coherent detection) for each frequency deviation, our design uses one mixer and one single integrator-decimator filter. We test our design using Universal Software Radio Peripheral as radio frequency front end and computer that implements the signal processing methods under free and open source software. We validate our solution experimentally and we show that in-band full duplex is feasible and synthesizable for wireless communications.
Źródło:
International Journal of Electronics and Telecommunications; 2019, 65, 3; 429-434
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of entrepreneurial self-efficacy on persistence : do financial literacy and entrepreneurial passion matter?
Wpływ samooceny przedsiębiorczości na przetrwanie : czy literacyjność finansowa i pasja przedsiębiorczości mają zastosowanie?
Autorzy:
Al Issa, Hussein-Elhakim
Abdelsalam, Mohammed Khalifa
Omar, Mohammed Mispah Said
Powiązania:
https://bibliotekanauki.pl/articles/405350.pdf
Data publikacji:
2019
Wydawca:
Politechnika Częstochowska
Tematy:
entrepreneurial self-efficacy
entrepreneurial passion
financial literacy
entrepreneurial persistence
samoocena przedsiębiorczości
pasja przedsiębiorcza
znajomość finansów
wytrwałość przedsiębiorcza
Opis:
The primary purpose of the current study is to investigate the entrepreneurial self-efficacy as an antecedent to persistency among entrepreneurs. In addition to that, the study examines the mediating role of entrepreneurial passion between entrepreneurial self-efficacy and entrepreneurial persistence. Lastly, the study explored the relationship between financial literacy and persistence and its moderating role between entrepreneurial passion and persistence. Structural equation modeling through of partial least square bootstrapping resampling was used for hypotheses testing to analyze the data collected from a sample of 273 Malaysian entrepreneurs. The results of the study supported all arguments broached in the current research for the subjective norm, entrepreneurial self-efficacy, which showed a significant impact on entrepreneurial passion and entrepreneurial persistence. The moderating effect of financial literacy on entrepreneurial passion and entrepreneurial persistency was also highly significant. The current work is among the pioneering studies that examine entrepreneurial self-efficacy, entrepreneurial passion, financial literacy and entrepreneurial persistence among entrepreneurs.
Głównym celem niniejszego badania jest zbadanie własnej skuteczności przedsiębiorczej jako czynnika poprzedzającego wytrwałość wśród przedsiębiorców. Ponadto badanie bada mediacyjną rolę pasji przedsiębiorczej między samowystarczalnością przedsiębiorczą a wytrwałością przedsiębiorczą. Wreszcie w badaniu zbadano związek między znajomością finansów a wytrwałością oraz jej moderującą rolą między pasją przedsiębiorczości a wytrwałością. Do testowania hipotez wykorzystano modelowanie równań strukturalnych za pomocą częściowego ponownego próbkowania ładowania metodą najmniejszych kwadratów, aby przeanalizować dane zebrane z próby 273 malezyjskich przedsiębiorców. Wyniki badania potwierdziły wszystkie argumenty poruszone w bieżących badaniach na rzecz subiektywnej normy, własnej skuteczności przedsiębiorczej, która wykazała znaczący wpływ na pasję przedsiębiorczą i trwałość przedsiębiorczą. Bardzo istotny był również moderujący wpływ wiedzy finansowej na pasję przedsiębiorczości i trwałość przedsiębiorcy. Obecna praca należy do pionierskich badań, w których analizuje się skuteczność przedsiębiorczą, pasję przedsiębiorczą, znajomość finansów i wytrwałość przedsiębiorczą wśród przedsiębiorców.
Źródło:
Polish Journal of Management Studies; 2019, 20, 2; 60-72
2081-7452
Pojawia się w:
Polish Journal of Management Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of Spraying the Shots Parts with Ascorbic Acid on the Concentration of Some Mineral Nutrients in Vicia faba Treated with Heavy Metals
Autorzy:
Al-Rashedy, Hussein Saber Mohammed Ali
Mame, Suzan Othman Omar
Alsinjari, Waffaa Esam
Powiązania:
https://bibliotekanauki.pl/articles/24201730.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
ascorbic acid
bean plant
heavy metals
magnesium
phosphorous
Opis:
This study aimed examine the impact of Ascorbic acid spraying once and twice at concentrations 250 and 500 mg/L on the concentration of some nutrients in the seeds of the bean plant (Vicia faba L.) grown on soils contaminated with nickel at concentrations 30 and 60 and lead at concentrations 300, 600 mg/kg soil.The results showed that soil treated with 600 mg/kg lead has a significant decrease of concentration of magnesium, phosphorous, potassium and chloride in the seeds of the bean plants which amounted to 1.16 , 1.121, 4.113 and 0.071 mg/g, respectively compared to the control group. It was also found that spraying the vegetative parts of the bean plant with 250 mg/L ascorbic acid twice was attributed to increasing of magnesium significantly in the seeds of the bean plant, which amounted to 4.00 mg/g. otherwise, spraying with the same concentration, but once, led to a significant increase in phosphorous concentration, which reached 1.335 mg/g. The results also showed that one-time spraying of 500 mg/L ascorbic acid led to a significant increase in chloride concentration, which amounted to 0.395 mg/g compared to the control group. The results show that lead treatment had a more negative effect on the concentration of nutrients compared to the effect of nickel. It was found that spraying with ascorbic acid at a concentration of 250 mg/L was significantly superior to the concentration of 500 mg/L of magnesium, phosphorous, potassium and chloride in the seeds of bean plants. Also, spraying with ascorbic acid once was superior to spraying twice with the concentration of both magnesium and chloride.
Źródło:
Journal of Ecological Engineering; 2023, 24, 6; 1--7
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł

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