Probabilistic Inventory Model with Lead Time Equals Single Scheduling Period and Varying Deteriorating Cost under Constraint
Hoda
Abdeldaim
Mathematics Department, Faculty of Science, Al-Azhar University (Girls campus).
author
Hala
Fergany
Statistic Department, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
author
Azza
Omar
Mathematics Department, Faculty of Science, Al-Azhar University (Girls campus).
author
Yasmien
Morsy
Mathematics Department, Faculty of Science, Al-Azhar University (Girls campus).
author
text
article
2020
eng
In this paper inventory model of declining goods with ambiguous and imprecise details about available storage has been established. Here, our targets are: 1- the optimal scheduling period, 2- the optimal order-level, 3- minimize the wastage cost due to the deterioration, 4- minimize the expected average total cost under a restriction on the expected average varying deteriorating cost by using the Lagrange method. This model, is developed for continuously deterioration rate is constant or follows a two-parameter Weibull distribution with varying and constrained expected deteriorating cost, Where the lead time is only one period of time, without shortage and when demand is a random variable during any scheduling time. These probabilistic models are studied in two cases: crisp numbers and trapezoidal fuzzy numbers. Some special cases are deduced. There is a numerical illustration to illustrate the proposed model in the crisp case and the fuzzy case and the sensitivity analysis is performed.
Al-Azhar Bulletin of Science
Al-Azhar University, Faculty of Science (Boys)
1110-2535
31
v.
Issue 2-B
no.
2020
1
15
https://absb.journals.ekb.eg/article_150877_ec0fc18da7ddc6ba6e0ef6e23720de26.pdf
dx.doi.org/10.21608/absb.2020.41932.1083
Cartesian harmonic polynomials for a problem of deformation of a long, current-carrying elastic cylindrical conductor of nearly-circular normal cross-section
Sayed
El Sheshtawy
Mathematics Department, Faculty of Science, Al Azhar University
author
A.-S.
Obada
Department of Mathematics, Faculty of Science, Al Azhar University, Egypt
author
Moustafa
Abu-Dina
Department of Mathematics, Faculty of Science, Cairo University, Giza 12613, Egypt
author
Ahmed
Ghaleb
Department of Mathematics, Faculty of Science, Cairo University, Giza 12613, Egypt
author
text
article
2020
eng
Harmonic Cartesian polynomial and rational functions are used to obtain a semi-analytical solution to the uncoupled, two-dimensional problem of thermo-magnetoelasticity for a long, transversely isotropic elastic cylinder of nearly-circular normal cross-section carrying an axial, steady electric current. Numerical results and plots are provided and discussed. Comparison with the case of a circular cross-section allows to assess the in uence of imperfection of the cross-sectional shape on the quantities of practical interest. The effect of dependence of the magnetic permeability on strain is investigated. We use the magnetic vector potential which is parallel to the axis of the cylinder. The mathematical problem reduces to the determination of ve harmonic functions, interrelated by a set of boundary conditions. Two of these harmonic functions combine to yield Airy's stress function in the cross-sectional domain in case the mechanical problem is solved in stresses. A third harmonic function enters in the formulation of the thermal problem for temperature distribution. The two remaining harmonic functions enter in the description of the vector potential distribution inside the conductor and in the surrounding region. The results nd application in calculating the deformation of straight central sections of electric conductors in various instruments, in particular busbars in electric power stations, and the stresses induced in them due to the electric current.
Al-Azhar Bulletin of Science
Al-Azhar University, Faculty of Science (Boys)
1110-2535
31
v.
Issue 2-B
no.
2020
16
29
https://absb.journals.ekb.eg/article_150879_91d16cf5bc9e77a877b12b7c952d0afe.pdf
dx.doi.org/10.21608/absb.2020.40436.1081
An Ontology-based Name Entity Recognition NER and NLP Systems in Arabic Storytelling
Marwa
Elgamal
Systems and Computer Department, Faculty of Engineering, Al-Azhar University, Cairo, Egypt
author
Mohamed
Abou-Kreisha
Mathematics Department, Faculty of Science, (Boys) Al-Azhar University, Cairo, Egypt
author
Reda
Abo Elezz
Systems and Computer Department, Faculty of Engineering, Al-Azhar University, Cairo, Egypt
author
Salwa
Hamada
Electronics Research Institute, Cairo, Egypt
author
text
article
2020
eng
Ontology is a descriptive model representing domain knowledge with robust specifications that solve interoperability between humans and machines. In this work, a practical methodology presented for Arabic Storytelling ontology construction for domain ontology extraction from unstructured Arabic story documents. However, the manual construction of ontologies is a time-consuming and challenging process. Still, ontology construction and learning, which extracts ontological knowledge from various data types automatically or semi-automatically, can overcome the bottleneck of knowledge acquisition. This paper intends to investigate the problem of automatically construct and build an Arabic storytelling ontology based on Arabic named entity recognition (NER) from unstructured story text. This paper presents a system designed based on Machine Learning (ML) approach. The system framework is a combination of five main stages: The first stage determines the requirement analysis—second document pre-processing using NLP tasks. The third is Conceptualization. The fourth stage is formal design and construction, and the final step is evaluation.
Al-Azhar Bulletin of Science
Al-Azhar University, Faculty of Science (Boys)
1110-2535
31
v.
Issue 2-B
no.
2020
31
38
https://absb.journals.ekb.eg/article_150881_3e2c4f6e12a50e5a67c5a7be2dadd326.pdf
dx.doi.org/10.21608/absb.2020.44367.1088
Structure and Behavior of Superdeformed Rotational Bands in the A∼190 Mass Region Using Exponential Model with Pairing Attenuation
Alhoseny
Abdalaty
Physics Department, Faculty of Science (Assuit branch), Al-Azhar University, Egypt
author
Madiha
Okasha
Physics Department, Faculty of Science (Girls branch), Al-Azhar University, Cairo, Egypt
author
Mahmoud
Gad
Physics Department, Faculty of Science, (Boys), Al-Azhar University, Cairo, Egypt
author
text
article
2020
eng
The exponential model with pairing attenuation (EMPA) is extended and used to analysis the superdeformed rotational bands(SDRB’s) in Thallium nuclei in the mass region A∼190 .The level spins are extracted by fitting the experimental dynamical moment of inertia J(2) to the theoretical version of Harris expansion in even powers of rotational frequency ħω. Using the assigned spins ,the parameters of the extended exponential model are adjusted by using a computer simulated search program to fit the transition energies with experimental ones .The best adopted parameters are used to calculate transition energies Eγ(I) rotational frequencies ħω ,kinematic J(1) and dynamic J(2) moments of inertia .The variation of J(1) and J(2) versus ħω are examined .A staggering functions depends on the concept of EGOS and finite differences are suggested to investigate and exhibit the I=1 staggering effects in transition energies in the studied SDRB’s. The phenomenon of identical bands in also investigated in Thallium nuclei.
Al-Azhar Bulletin of Science
Al-Azhar University, Faculty of Science (Boys)
1110-2535
31
v.
Issue 2-B
no.
2020
1
9
https://absb.journals.ekb.eg/article_150882_59716377e07b8943f5e2f710d194b214.pdf
dx.doi.org/10.21608/absb.2020.37318.1075
Gas type role on the dynamics of channel spark pulsed electron deposition system
Ahmed
Abdo
Physics Department, Faculty of Science, Al-Azhar University, Cairo, Egypt
author
Mahmoud
Elgarhy
Physics Department, Faculty of Science, Al-Azhar University, Cairo, Egypt
author
Ahmed
Abouelsayed
Spectroscopy Department, Physics Division, National Research Centre, 33 El Bohouth st. (fromer El Tahrir st.) P.O. 12622 Dokki – Giza – Egypt.
author
Usama
Rashed
Physics Department, Faculty of Science, Al-Azhar University, Cairo, Egypt
author
Safwat
Hassaballa
Physics Department, Faculty of Science, Al-Azhar Universitrt, Cairo, Egypt
author
text
article
2020
eng
In this paper, the effect of feeding gas type on the dynamics of channel spark pulsed electron deposition system is investigated. Electrical, magnetic, and optical characterisations of the system were measured for different feeding gases, oxygen (O2), nitrogen (N2), and argon (Ar). The discharge current for each gas type was measured with maximum value of 1189 A for O2 at -13 kV applied voltage. The discharge current and voltage waveforms were simulated by LRC circuit theory. Effect of gas pressure on the maximum discharge current and total inductance was also investigated. The beam current investigated by faraday cup and reached maximum electron beam current of 136 A for O2 gas. Two magnetic pickup coils were employed for the measurements of beam kinetic dynamics and the measured beam speed was around 0.4× 106 m/sec. Electron beam plasma density was calculated from faraday cup and magnetic coils signals and found to be 1.96×1020 m-3. Optical emission spectra were also measured to identify reactive species and its role in electron beam interaction with graphite target for thin film deposition application. The ability of using the system for thin film deposition is demonstrated by depositing amorphous hydrogenated carbon (a-C:H) films over silicon substrates.
Al-Azhar Bulletin of Science
Al-Azhar University, Faculty of Science (Boys)
1110-2535
31
v.
Issue 2-B
no.
2020
11
19
https://absb.journals.ekb.eg/article_150884_793a6a10ceb5f48b418862e37cd224d3.pdf
dx.doi.org/10.21608/absb.2020.41063.1082
Effect of gamma radiation on the structure and thermal properties of polyaniline-cobalt/polycarbonate nanocomposite
Rania
Samy
physics department, faculty of science girls-brunch, Azhar university, Cairo, Egypt.
author
Sayed
hassan
Nuclear Material Authority, Maadi, Cairo, Egypt.
author
Mohamed
El-Feky
Nuclear Material Authority, Maadi, Cairo, Egypt.
author
Tarek
Hegazy
Physics Department, Faculty of girls, Ain Shams University, Cairo Egypt.
author
A.
Al-Hagg
Physics Department, Faculty of Science, Al-Azhar University (Girl Branch), Cairo, Egypt.
author
text
article
2020
eng
The induced alterations in the structure and thermal properties of polyaniline-cobalt/polycarbonate, PANI-Co/PC, nanocomposite (NCP) owing to irradiation have been investigated. The chemical composition and morphology of the prepared NCP samples were studied using scanning electron microscopy and energy dispersive spectrometry technique. Additionally, X-ray diffraction (XRD), FTIR spectroscopy, thermogravimetric analysis (TGA) and differential thermal analysis (DTA) were performed to investigate the resulted effect of radiation. The radiation with doses 50-350 kGy leads to the prevalence of intermolecular crosslinking which enhances the disordered phase and increases the bonds between the hydrogen of the PANI amine groups and carbonyl groups of PC. This is reflected in a rise in the degradation temperature values from 400 to 475oC indicating an improvement in the thermostability of the NCP samples. Additionally, the melting temperature increased from 350 to 361 oC indicating a more compact structure of the NCP samples.
Al-Azhar Bulletin of Science
Al-Azhar University, Faculty of Science (Boys)
1110-2535
31
v.
Issue 2-B
no.
2020
19
28
https://absb.journals.ekb.eg/article_150885_93f7b9928995100a78b63b8b4bb80405.pdf
dx.doi.org/10.21608/absb.2020.39732.1080
Video semantics exploration for indexing and retrieval
text
article
2020
eng
Video semantic concepts exploration is a fundamental problem in a video indexing and retrieval. It has a long history of investigation since early days till recent achievements. The challenges lie in bridging the gap between low level features and semantic level ones. To stand on the thoroughly situation, video semantic concepts exploration for indexing and retrieval purposes evolution from conventional methods to the state-of-the-art ones will be reviewed. The main contribution is to unify concepts involved and evolution in this interesting topic.
Al-Azhar Bulletin of Science
Al-Azhar University, Faculty of Science (Boys)
1110-2535
31
v.
Issue 2-B
no.
2020
39
50
https://absb.journals.ekb.eg/article_210373_14ac63c2dc219fa2e4135d46f14855b4.pdf
dx.doi.org/10.21608/absb.2020.210373
A COMPARATIVE STUDY AMONG THE MAIN CATEGORIES OF NoSQL DATABASES
text
article
2020
eng
Relational databases are usually used for data storage and retrieval. They are suitable for limited data volume. But when it comes to Bigdata, we need to use more flexible databases that satisfy the need to handle semi-structured and unstructured data. These databases are called NoSQL (Not only SQL) databases. This type of database was developed to interact with data of large volumes. NoSQL databases provide many features such as scalability, availability, replication models, file sharing, and schema-free. This paper’s main purpose is to present a comparative study of the five main categories of NoSQL databases; key-value stores, document stores, column family stores, graph stores databases, and object store NoSQL systems. Also, it discusses the famous database management systems for each one of these five categories. The comparison criteria used are performance, scalability, flexibility, complexity, and functionality. Moreover, this paper presents an overview of big data concepts. It briefly discusses the SQL databases versus NoSQL databases in terms of their high-level characteristics. Furthermore, this paper emphasizes the advantages and disadvantages of NoSQL databases. It illustrates the query languages in both SQL and NoSQL databases and represents the most common uses for each category to help users choose the most convenient DBMS for their organization.
Al-Azhar Bulletin of Science
Al-Azhar University, Faculty of Science (Boys)
1110-2535
31
v.
Issue 2-B
no.
2020
51
60
https://absb.journals.ekb.eg/article_210374_b9b7bf0dc214666bfa98ccd394579e04.pdf
dx.doi.org/10.21608/absb.2020.210374
HISTORICAL STUDY OF POLLUTANTS EMISSION OVER EGYPT USING ACCMIP DATA
text
article
2020
eng
Statistical analysis for the emissions of some pollutants over Egypt during the period from 1850 to 2000 using the ACCMIP (Atmospheric Chemistry and Climate Model Intercomparison Project) history emission inventory dataset has been done. The seasonal and annual variations of the following compounds: Black Carbon (BC), Carbon monoxide (CO), Propane (C3H8), Formaldehyde (HCHO), Nitrogen Oxides (NOX), Toluene (C7H8), Ethylene (C2H4), Ammonia (NH3), Propene (C3H6), Sulfur Dioxide (SO2) and Organic Carbon (OC) have been examined. It is found that these pollutants are intense over Nile Delta and Greater Cairo (30.25º - 31.75º E and 29.25º - 31.25º N); it produces mainly from human activities. The annual analysis of these pollutants illustrates that four of them (C3H8, HCHO, SO2 and NOX) have the same behavior during the period of study, where an obvious increase appears from about 1930 to 2000. Also, there are four pollutants (BC, C2H4, C3H6 and OC) that have the same behavior, where an evident increase appears from 1830 to 2000. The higher values of the coefficient of variation (COV) appears with the seasonal and annual time series of CH2O and C3H8 while the lower values of COV were found with the time series of C2H4 and C3H6. The trend analyses conclude that an obvious increase of all pollutants emissions except with NH3 where a negative trend appears with the seasonal and annual time series during the period from 1930 to 2000.
Al-Azhar Bulletin of Science
Al-Azhar University, Faculty of Science (Boys)
1110-2535
31
v.
Issue 2-B
no.
2020
1
9
https://absb.journals.ekb.eg/article_210378_98654302bfadff90a8da9ec0ae8f950c.pdf
dx.doi.org/10.21608/absb.2020.210378
VACUUM DESALINATION SYSTEM FOR SEAWATER AT LOW TEMPERATURES
text
article
2020
eng
In this paper a proposed apparatus for seawater desalination at low temperature and low pressure is discussed. Based on the idea of Torricelli barometer, water vapor above seawater and water vapor above fresh water are forced to gather in a tube connecting the two water sources in nearly vacuum environment. Creating temperature difference between the two water sources develops large pressure difference between the saturated water vapor pressures above the two water sources. This pressure difference forces water vapor to move from the hotter seawater surface to condense in the cooler fresh water area. The apparatus automatically substitutes the evaporated seawater and transmits the fresh water to where it is needed, i.e. no energy is required to feed the apparatus with seawater or to transfer fresh water. The apparatus also automatically get rid of brine (more salty seawater due to evaporation) by replacing with fresh warm seawater. The variability of atmospheric surface pressure due to season change or the passage of atmospheric systems that can disturb the apparatus performance is also considered. The study indicates, theoretically, that this technique which was known to be suitable for small-scale freshwater needs can yield one order of magnitude larger than expected. Theoretically, it is shown that with the simple proposed apparatus, the estimated fresh water yield can be more than 10 m3 per day. Experiments are required to test the idea.
Al-Azhar Bulletin of Science
Al-Azhar University, Faculty of Science (Boys)
1110-2535
31
v.
Issue 2-B
no.
2020
11
18
https://absb.journals.ekb.eg/article_210379_800fd9203ae1c80426546e321b656b8b.pdf
dx.doi.org/10.21608/absb.2020.210379