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Tytuł:
The use of natural fibers in stone mastic asphalt mixtures: a review of the literature
Autorzy:
AlSaadi, Israa
Tayh, Sady A.
Jasim, Abbas F.
Yousif, Rana
Powiązania:
https://bibliotekanauki.pl/articles/27312180.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
włókno celulozowe
właściwości mechaniczne
włókno naturalne
zawartość
mieszanka SMA
asfalt
włókno odpadowe
cellulose fiber
mechanical properties
natural fiber
content
stone mastic asphalt
waste fiber
Opis:
All over the world, highway traffic is increasing rapidly, as is the population and the road network. The country’s maximum and minimum temperatures also vary greatly. Moreover, the pavements are subjected to various types of damage. Pavement binders and mixtures are a constant area of research and development for scientists and engineers. Adding fibers to bituminous mixes may improve the properties of fatigue and strength of the material. Natural fibers may be used to improve asphalt mixtures performance due to their inherent compatibility with asphalt cement and excellent mechanical properties. Also, the high stone content and relatively high asphalt content in SMA mixture led to the occurrence of drain-down of the asphalt mastic from the mixture, and this problem requires the use of stabilizing additives such as cellulose fibers, mineral fibers, or polymers to mitigate this problem and ensure long-term performance. The most public sort of stabilizing additives is cellulose fiber. Overall, natural fibers in stone mastic asphalt mixes are discussed in this paper. An additional focus is on how asphalt concrete will be affected by natural fibers, mixing techniques, and managerial decisions. According to the review, the stabilizing and strengthening impact of natural fibers on the performance of asphalt mixes have been extensively researched. Natural fibers can significantly increase the rut and flow resistance of asphalt mixtures. Adding natural fibers to pavement can increase structural resistance to pavement distress.
Źródło:
Archives of Civil Engineering; 2023, 69, 3; 347--370
1230-2945
Pojawia się w:
Archives of Civil Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The impact of crises situations on the development of business continuity management during the COVID-19 pandemic in Jordanian hospitals
Wpływ sytuacji kryzysowych na rozwój zarządzania ciągłością działania w czasie pandemii COVID-19 w szpitalach Jordanii
Autorzy:
AL-Khrabsheh, Abdullah Abbas
Murad, Maisoon Abo
AL-Bazaiah, Sakher A. I.
Alrabab'a, Mahmoud H.
AL-Nsour, Marwan Muhammad
AL-Khrabsheh, Abdelruhman Abbas
Powiązania:
https://bibliotekanauki.pl/articles/2069797.pdf
Data publikacji:
2022
Wydawca:
Fundacja Ekonomistów Środowiska i Zasobów Naturalnych
Tematy:
crisis
Jordanian hospital
business continuity management
probability of crisis recurrence
kryzys
szpital jordański
zarządzanie ciągłością działania
prawdopodobieństwo nawrotu kryzysu
Opis:
In this paper, the researchers have investigated the effect of various crises on the development of the Business Continuity Management (BCM) process in Jordanian hospitals. They used the quantitative research design technique to fulfil all the study’s objectives. After that, they also tested whether their hypothesised model could be used for developing the BCM. After distributing question-naires amongst the supervisors working in 7 private hospitals in Amman, Jordan, they collected all the data. Then, they carried analysed and sorted all the data using the SPSS software. The study results showed that the hospitals in Jordan were eager to maintain security and stability in the case of a crisis. Additional statistical tests presented evidence regarding the positive effect of different factors (such as external/ internal crises, natural disasters, operational and strategic risks, and the probability of recurrence of a crisis) on the BCM development in Jordanian hospitals. Here, the researchers have attempted to offer insights and knowledge to help practitioners, academicians and policymakers.
W niniejszym artykule zbadano wpływ różnych sytuacji kryzysowych na rozwój procesu zarządzania ciągłością działania (ang. Business Continuity Management, BCM) w jordańskich szpitalach. Wykorzystano technikę projektowania badań ilościowych. Przetestowano również, czy hipotetyczny model można wykorzystać do opracowania BCM. Dane, uzyskane w wyniku badania ankietowego przełożonych pracujących w 7 prywatnych szpitalach w Ammanie w Jordanii, zostały przeanalizowane za pomocą oprogramowania SPSS. Wyniki badania wykazały, że szpitale w Jordanii dbały o zachowanie bezpieczeństwa i stabilności na wypadek kryzysu. Dodatkowe testy statystyczne dostarczyły dowodów na pozytywny wpływ różnych czynników (takich jak kryzysy zewnętrzne/wewnętrzne, klęski żywiołowe, ryzyka operacyjne i strategiczne, prawdopodobieństwo ponownego wystąpienia kryzysu) na rozwój BCM w jordańskich szpitalach. Autorzy próbowali przedstawić spostrzeżenia i wiedzę, które mogą być pomocne praktykom, naukowcom i decydentom.
Źródło:
Ekonomia i Środowisko; 2022, 1; 84--108
0867-8898
Pojawia się w:
Ekonomia i Środowisko
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Challenge of Terminographic Gaps in Translation: A Text-based Approach Put to Practice
Autorzy:
Mehrpooya, Abbas
Moinzadeh, Ahmad
Dabaghi, Azizollah
Powiązania:
https://bibliotekanauki.pl/articles/620653.pdf
Data publikacji:
2019-01-22
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
Specialized discourse
Technical term
Terminological gap
Terminography
Translation
Opis:
The issue of terminographic gaps in specialized discourses has always concerned the researchers and readers alike. However, due to the interlingual nature of such a technical issue, the need for interdisciplinary collaboration between translation and terminography seems to be in prospect. For such a reciprocation scheme to come into practical effect, the present study has aimed to conduct a translational-terminographic concerto by putting a specialized English text to the test of Persian translation. This has been done to answer the question if a translator is required to provide for any terminological gap once all attempts at finding the corresponding terminological items have failed. In this pursuit, certain workable criteria for terminographic proposition via translation have been discussed. As such, the practical phase of this study concerns itself with addressing the issue of Persian terminological gaps in a language-related metadiscoursal field and consequently detecting the problem zones of non-equivalence in a specialised text carefully selected for translation. Ultimately, a list of Persian terminological items constructed on the basis of the proposed translational-cum-terminographical scheme is compiled to address the identified terminological gaps in the target metadiscourse under study.
Źródło:
Research in Language; 2018, 16, 2
1731-7533
Pojawia się w:
Research in Language
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis of CdSe nanostrucature using thermal evaporation method toward Light-emitting-diode
Autorzy:
Muttalib, Alrabab A. Abdul
Dakhil, Osama A.
Abbas, Khaldoon N.
Powiązania:
https://bibliotekanauki.pl/articles/1046545.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
CdSe nanoparticles
Light-emitting-diode (LED)
Thermal evaporation
Opis:
Efficient Light-emitting-diode (LED) constructed of CdSe/Si CdSe nano particles were synthesized through thermal evaporation method using tube furnace and Ar as carrier gas. The synthesized nanoparticles were subjected to structural, optical, morphological, and electrical investigation. The nanoparticles structural properties studied by X-Ray diffraction, confirm the formation of hexagonal structure of CdSe (NPs). The preferred growth direction toward (100) orientation. Crystallite size was calculated by Scherrer’s equation. The surface morphology formation studied by Scanning Electron Microscopy (SEM) and average grain size also has been calculated. FESEM images revel sheets and tetra pods constructed of nano particles with average size 15-40 nm. Ultraviolet-visible (UV-Vis) absorption spectrum showed the absorption peak of CdSe at 350 nm. PL measurements show the emission peaks at 641 and 678 nm. The results of (I-V) measurements show the large ratio between the darkness and light state, which shows the correct behavior of LEDs. The ideality factor was estimated at the optimum conditions and it has been found (1.18).
Źródło:
World Scientific News; 2019, 138, 2; 248-259
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of solidification behaviour and mechanical properties of arc stud welded AISI 316L stainless steel
Autorzy:
Abass, M. H.
Alali, M. S.
Abbas, W. S.
Shehab, A. A.
Powiązania:
https://bibliotekanauki.pl/articles/367964.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
arc stud welding
AISI 316L stainless steel
solidification mode
solidification cracking
second phase
spawanie łukowe
stal nierdzewna AISI 316L
model krzepnięcia
druga faza
Opis:
Purpose: This paper aims to investigate the impact of arc stud welding (ASW) process parameters on the microstructure and mechanical properties of AISI 316L stainless steel stud/plate joint. Design/methodology/approach: The weld performed using ASW machine. The influence of welding current and time on solidification mode and microstructure of the fusion zone (FZ) was investigated using optical microscope and scanning electron microscope (SEM). Microhardness and torque strength tests were utilised to evaluate the mechanical properties of the welding joint. Findings: The results showed that different solidification modes and microstructure were developed in the FZ. At 400 and 600 A welding currents with 0.2 s welding time, FZ microstructure characterised with single phase austenite or austenite as a primary phase. While with 800 A and 0.2 s, the microstructure consisted of ferrite as a primary phase. Highest hardness and maximum torque strength were recorded with 800 A. Solidification cracking was detected in the FZ at fully austenitic microstructure region. Research limitations/implications: The main challenge in this work was how to avoid the arc blow phenomenon, which is necessary to generate above 300 A. The formation of arc blow can affect negatively on mechanical and metallurgical properties of the weld. Practical implications: ASW of austenitic stainless steel are used in multiple industrial sectors such as heat exchangers, boilers, furnace, exhaust of nuclear power plant. Thus, controlling of solidification modes plays an important role in enhancing weld properties. Originality/value: Study the influence of welding current and time of ASW process on solidification modes, microstructure and mechanical properties of AISI 316 austenitic stainless steel stud/plate joint.
Źródło:
Journal of Achievements in Materials and Manufacturing Engineering; 2019, 97, 1; 5-14
1734-8412
Pojawia się w:
Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sporadoceratid ammonoids from the Shotori Range (east-central Iran) - a case of putative gigantism caused by hydraulic sorting?
Autorzy:
Korn, Dieter
Ghaderi, Abbas
Devaere, Léa
Hairapetian, Vachik
Khanehbad, Mohammad
Belka, Zdzisław
Powiązania:
https://bibliotekanauki.pl/articles/949758.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Late Devonian
Famennian
Iran
ammonoids
body size
conodonts
dewon
famen
amonoidy
rozmiar
konodonty
Opis:
The Shotori Range of east-central Iran (east of Tabas) has yielded Famennian ammonoid assemblages dominated by the family Sporadoceratidae. Four genera Maeneceras Hyatt, 1884, Iranoceras Walliser, 1966, Sporadoceras Hyatt, 1884 and Erfoudites Korn, 1999 are represented. The conodont assemblage of one sample containing Iranoceras revealed an Upper marginifera Zone age. The ammonoid assemblages are characterised by comparatively large specimens; they reach conch diameters of 300 mm (including the body chamber) and the mean size is larger than 100 mm. The preservation of the material from the Shotori Range and size comparison with sporadoceratid assemblages from the Anti-Atlas of Morocco and the Rhenish Mountains of Germany suggest that hydraulic sorting has resulted in a bias towards large conchs, explaining the size distribution, rather than latitudinal differences. The new species Maeneceras tabasense is described; the genus Iranoceras is revised with a new description of the two species Iranoceras pachydiscus (Walliser, 1966) and Iranoceras pingue (Walliser, 1966).
Źródło:
Acta Geologica Polonica; 2019, 69, 1; 27-49
0001-5709
Pojawia się w:
Acta Geologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spatial distribution of early blight disease on tomato, climatic factors and bioefficacy of plant extracts against Alternaria solani
Autorzy:
Hussain, A.
Ali, S.
Abbas, H.
Ali, H.
Khan, S.W.
Powiązania:
https://bibliotekanauki.pl/articles/12689876.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
Pakistan
plant cultivation
tomato
vegetable
climatic factor
bioefficacy
plant extract
plant pathogen
Alternaria solani
plant disease
blight
early blight
field survey
spatial distribution
spatial analysis
Geographic Information System
Opis:
Information on the spatial variability in plant disease is essential for location-based disease management. In the current study, the spatial distribution of tomato early blight disease was ascertained in District Gilgit, GilgitBaltistan, Pakistan. The comprehensive field survey was carried in two growing seasons (2014–2015), whereas in each growing season, 62 tomato fields were surveyed. Based on the distribution of disease, the respective thematic maps (incidence and severity) were prepared using Arc Map 10.1 with spatial analyst function of Arc GIS software by means of the inverse distance weight (IDW) interpolation method. Results indicate that early blight of tomato is spatially distributed in both growing seasons. However, in the first growing season, the disease incidence ranged from 10.22% to 44.16% and during later season 14.03–49.16%, whereas 5.37–16.40% and 6.52–26.94% severity was recorded. Furthermore, this information indicates that higher disease infestation occurred in 2015 in relation to 2014. This information linked to metrological data (temperature, precipitation and relative humidity), seemingly favored the early blight development during the growing period. Seven botanical extracts were tested against pathogen Alternaria solani at different concentrations (4, 6 and 8%). Results revealed that all tested plant extracts showed antifungal activities. However, at 8% concentration of plant extract, Datura starmonium, Berberis orthobotry, Podophyllum emodi and Uretica dioica exhibited >60%, while Peganum harmala, Artemisia maritima and Capparis spinosa <60% antifungal properties. The information generated due to this study could help the tomato growers regarding disease management and selection of resistant cultivars, improving profitability and food security in the Gilgit region.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2019, 18, 6; 29-38
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some new existence results and stability concepts for fractional partial random differential equations
Autorzy:
Abbas, S.
Benchohra, M.
Darwish, M. A.
Powiązania:
https://bibliotekanauki.pl/articles/357770.pdf
Data publikacji:
2016
Wydawca:
Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
Tematy:
random differential equations
left-sided mixed Riemann-Liouville integral
Caputo fractional-order derivative
Banach space
Darboux problem
Ulam stability
równanie różniczkowe
pochodna Caputo
przestrzeń Banacha
problem Darbouxa
Opis:
In the present paper we provide some existence results and Ulam’s type stability concepts for the Darboux problem of partial fractional random differential equations in Banach spaces, by applying the measure of noncompactness and a random fixed point theorem with stochastic domain.
Źródło:
Journal of Mathematics and Applications; 2016, 39; 5-22
1733-6775
2300-9926
Pojawia się w:
Journal of Mathematics and Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Removal of reactive yellow dye 145 from wastewaters over activated carbon that is derived from Iraqi kehdrawy date palm seeds
Autorzy:
Esmael, Hussein A.
Lafta, Abbas J.
Nema, Noor A.
Kahdum, Salih H.
Mousa, Abdulazeez A.
Abdali, O. Karar
Powiązania:
https://bibliotekanauki.pl/articles/1193943.pdf
Data publikacji:
2015
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Activated carbon
Activated charcoal
Adsorption over activated carbon
Textile dyes
activated carbon
date palm seeds
linear Freundlich
linear Langmuir
Opis:
This work involves synthesis of activated carbon from Iraqi date palm seeds as agricultural wastes using kehdrawy palm seeds. The preparation was conducted by chemical activation method using ZnCl2 as an activator. The synthesized activated carbon (AC) was characterized by different analytical and spectroscopic methods. This involves using scanning electron microscopy (SEM), flourier transformation infrared (FTIR), ash content, adsorption capacity, the percentage of humidity and the point zero charge (PZC). The activity of the prepared activated carbon was investigated by following the removal of reactive yellow 145 dye (RY 145) from the aqueous solutions. For a comparison a sample of non- activated carbon (NAC) was used in the same process. From the obtained results it was found that AC was more efficient in dye removal in comparison with NAC under the same conditions
Źródło:
World Scientific News; 2015, 21; 77-89
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Predicting and minimizing the blasting cost in limestone mines using a combination of gene expression programming and particle swarm optimization
Autorzy:
Bastami, Reza
Bazzazi, Abbas Aghajani
Shoormasti, Hadi Hamidian
Ahangari, Kaveh
Powiązania:
https://bibliotekanauki.pl/articles/1853861.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
kopalnia wapienia
wybuch detonacyjny
regresja nieliniowa
blasting cost
limestone mine
gene expression programming
non-linear multivariate regression
particle swarm optimization algorithm
environmental impacts
Opis:
Blasting cost prediction and optimization is of great importance and significance to achieve optimal fragmentation through controlling the adverse consequences of the blasting process. By gathering explosive data from six limestone mines in Iran, the present study aimed to develop a model to predict blasting cost, by gene expression programming method. The model presented a higher correlation coefficient (0.933) and a lower root mean square error (1088) comparing to the linear and nonlinear multivariate regression models. Based on the sensitivity analysis, spacing and ANFO value had the most and least impact on blasting cost, respectively. In addition to achieving blasting cost equation, the constraints such as frag-mentation, fly rock, and back break were considered and analyzed by the gene expression programming method for blasting cost optimization. The results showed that the ANFO value was 9634 kg, hole dia-meter 76 mm, hole number 398, hole length 8.8 m, burden 2.8 m, spacing 3.4 m, hardness 3 Mhos, and uniaxial compressive strength 530 kg/cm2 as the blast design parameters, and blasting cost was obtainedas 6072 Rials/ton, by taking into account all the constraints. Compared to the lowest blasting cost among the 146-research data (7157 Rials/ton), this cost led to a 15.2% reduction in the blasting cost and optimal control of the adverse consequences of the blasting process.
Źródło:
Archives of Mining Sciences; 2020, 65, 4; 835-850
0860-7001
Pojawia się w:
Archives of Mining Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Power System Transient Stability Case Study: A Power Sub-Station Plant in Sudan
Autorzy:
Abbas, Asma
Kamal, Ramadan Doud
Elmustafa, Sayed Ali Ahmed
Powiązania:
https://bibliotekanauki.pl/articles/1193487.pdf
Data publikacji:
2021
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Dynamic Stability
GARRI power stations
Swing Equation
Transient Stability
power angle
synchronism
Opis:
Power system stability is defined by the tendency of the energy system to develop recovery forces equal or greater than the disturbing forces to maintain a stable equilibrium state. In general, power system stability problems are usually divided into two parts, steady state and transient state. An extension of steady-state stability is dynamic stability. Transient stability deals with the effects of large disturbances such as malfunctions, sudden line interruptions, and sudden application or load removal. This research is presents load angle method to transient stability problem for multi-machine system. The ETAP program is used to simulate the above method to study transient stability. A sub-station plant in Khartoum (GARRI) with four generation sections (1, 2 and 4) has been taken as a case study. The simulation result shows that when a single line-ground fault occurs at main busbar and cleared at time t = 0.4 sec the system is stable, in case 2, when the same fault cleared at t = 3 sec the system become unstable.
Źródło:
World Scientific News; 2021, 158; 267-284
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
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