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Psychological Repercussions of Morbid Adherent Placenta (MAP) Patients

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Open Journal of Obstetrics and Gynecology 2019年第9期9卷 1284-1289页

作者： Laila yahya A. Alhubaishi Department of Obstetrics & Gynecology Latifa Hospital Dubai Health Authority Duabi UAE

Morbidly adherent placenta (MAP) is a major cause of maternal morbidity and cause of severe fear and stress to the patient, family and the treating staff. Proper counseling and sympathetic case handling and management is of great relief. Detailed explanation for the pathology and the treatment plan will support the psychology of the patient and surrounding.

关键词： Morbid Adherent Placenta Maternal Morbidity Maternal Mortality Psychological Repercussions

Antimicrobial and Catalytic Activities of Green Synthesized Silver Nanoparticles Using Bay Laurel (<i>Laurus nobilis</i>) Leaves Extract

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Journal of Biomaterials and Nanobiotechnology 2019年第1期10卷 26-39页

作者： Abdulaziz yahya Al-Ghamdi Department of Biology Faculty of Science Al-Baha University KSA

In this study, bay laurel extract (BLE) used as a reducing and capping agent for the synthesis of silver nanoparticles (AgNPs). The green-prepared AgNPs investigated using UV-visible spectroscopy, Fourier-transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD), Scanning Electron Microscopy with Energy Dispersive X-ray (SEM-EDX) and Transmission electron microscopy (TEM). Formation of AgNPs monitored at ambient temperature by a change in color from the starting solution to da.k.brown. Green synthesis AgNps were investigated for antimicrobial activity. The microorganisms employed were E. coli, k. pneumoniae, B. cereus, S. aureus, C. lbicans and Aspergillus. The susceptibility of microorganisms against the six AgNPs solutions was determined using the disk diffusion method. The catalytic activity of the prepared AgNPs (sample, d) for basic brown 1 dye was investigated. The results showed the characteristic surface plasmon resonance peak of the AgNPs appeared at approximately 415 - 440 nm. XRD revealed peaks at 38.2, 44.16, 64.24 and 77.22 Ɵ, and the intensity of these peaks enhanced when using microwave curing compared to ambient temperature. SEM and TEM results showed that the silver nano particles have a spherical shape and the particle size for samples is less than 34 nm. FTIR spectroscopy measurements showed the binding of organic compounds on the surface of the silver nanoparticles. Highest antibacterial activity was enhanced with increasing of AgNPs dose and with increasing of extract ration against most of microorganisms except. Removal of basic brown 1 dye by the prepared AgNPs indicated complete dye removal after 8 h.

关键词： Green Synthesis AgNPs Removal Basic Brown 1 Biological Activity

Numerical Study of the Effect of Thermosiphon on the Vertical Dispersion of Pollutants

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Journal of Mechanics Engineering and Automation 2016年第6期6卷 295-300页

作者： Zeinebou yahya Cheikh Mbow Department of Physics Faculty of Sciences and Arts Qassim University Buraidah 51452 Kingdom of Saudi Arabia Department of Physics Faculty of Science and Technology Cheikh Anta Diop of Dakar University Dakar 61641 Sengal

The dispersion of pollutants in urban environments is a major problem. Because of this fact our study comes to propose prevention and security system against the dispersion of releases and fumes from industrial smokesta.k.. The system is modeled by a plume-thermosiphon interaction flow resulting from a vertical cylinder open at both ends with a generating source of the plume centered at the opening of the cylinder. The cylindrical wall heats under the effect of the thermal radiation emitted by the generator source, which causes a flow of thermosiphon around the flow of the thermal plume. In order to determine the radiosity of radiation leaving the wall we have been used the Simpson quadrature and the Gaussian elimination method with a dominant pivot. Numerical simulations have been executed for different positions of the thermosiphon compared to the plume source, and for a number of Rayleigh fixed Ra = 10＋7, and a radius of the hot source corresponds to R＊ = 0.46. The results oftbe numerical model that we have been developed, help first identify the behavior of pollutants from the dynamic and thermal point of view and then explore the different locations of the thermosiphon compared to the source of the plume which causes a major influence on the dispersion of pollutants.

关键词： Interaction numerical modelling pollutants thermosiphon.

费托合成反应中纳米铁催化剂上La和Ba助剂的协同效应(英文)

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催化学报 2012年第7期33卷 1119-1124页

作者： yahya ZAMANI Mehdi BAkAVOLI Mohamad RAHIMIZADEH Ali MOHAJERI Seyed Mohamad SEYEDI Department of Chemistry Ferdowsi University of MashhadAzadi SquareMashhad91735-48974Iran Research Institute of Petroleum Industry(RIPI) National Iranian Oil Company West Blvd. Near Azadi Sports Complex P.O.BOX 14665-137TehranIran

Effect of promoters such as Barium and Lanthanum has been investigated on the conventional nanostructured iron catalyst in Fischer-Tropsch synthesis (FTS). The nanosized iron-based catalysts were prepared by a microemulsion method with the general formulation of 100Fe/4Cu, 100Fe/4Cu/2La, 100Fe/4Cu/ 1La/1Ba, and 100Fe/4Cu/2Ba. The phase, structure, and morphology of the catalysts were characterized by X-ray diffraction, N2 adsorption, transmission electron microscopy, temperature-programmed desorption of CO2, and temperature- programmed reduction. The results indicated that the addition of promoters could improve the activity of Fe catalysts for FTS and WGS (water-gas shift reaction) and lower the gas fraction at the outlet. In addition, both Ba- and La-promoted Fe catalysts exhibit the highest activity due to the synergetic effect.

关键词：纳米结构铁催化剂协同作用 Ba 合成透射电子显微镜水煤气变换反应 Fe催化剂

Antibacterial Activity of Green Synthesis Silver Nanoparticles Using Some Wild Edible Plants Commonly Used in Al Baha, Saudi Arabia

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Advances in Microbiology 2018年第12期8卷 938-949页

作者： Abdulaziz yahya Al-Ghamdi Department of Biology Faculty of Science Al Baha University Al Baha Saudi Arabia

In the present study, aqueous extract of Cissus rotundifolia (Wild edible plants) was used as a reducing and capping agent in the formation of silver nanoparticles (AgNPs). UV-visible spectroscopy (Uv-Vis) was used to monitor the formation of AgNPs in the aqueous medium. The green-prepared AgNPs investigated using Fourier-transform infrared spectroscopy (FTIR) and X-ray powder diffraction (XRD). The morphology and size of the benign silver nanoparticles were carried out by the transmission electron microscope (TEM) and field emission scanning electron microscope (FE-SEM). The susceptibility of bacteria strains against the green synthesis AgNPs was determined using the disk diffusion method. The microorganisms employed were E. coli, k. pneumoniae, B. cereus, S. aureus, C. lbicans and Aspergillus. The results showed the characteristic surface plasmon resonance peak of the AgNPs appeared at approximately 418 - 446 nm. XRD revealed peaks at 38.2, 44.16, 64.24 and 77.22 θ, and the intensity of these peaks enhanced when using microwave curing compared to ambient temperature. SEM and TEM results showed that the silver nanoparticles have a spherical shape and the particle size for samples is less than 37 nm. FTIR spectroscopy measurements showed the binding of organic compounds on the surface of the silver nanoparticles. The highest antibacterial activity was enhanced with increasing of AgNPs dose and with increasing of extract ration against most of microorganisms.

关键词： Green Synthesis AgNPs FTIR XRD SEM-EDX & TEM Biological Activity

Extraction of Signals Buried in Noise: Non-Ergodic Processes

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International Journal of Communications, Network and System Sciences 2010年第12期3卷 907-915页

作者： Nourédine yahya Bey 不详

In this paper, we propose extraction of signals buried in non-ergodic processes. It is shown that the proposed method extracts signals defined in a non-ergodic framework without averaging or smoothing in the direct time or frequency domain. Extraction is achieved independently of the nature of noise, correlated or not with the signal, colored or white, Gaussian or not, and locations of its spectral extent. Performances of the pro-posed extraction method and comparative results with other methods are demonstrated via experimental Doppler velocimetry measurements.

关键词： Buried Signals Stationary Non-Ergodic Processes Spectral Analysis White Noise Colored Noise Correlated Noise Doppler Velocimetry

Prioritization of W. Alarab Sub-Watersheds (North Jordan) for Conservation Measures Using RS, GIS, and Multi-Criteria Analysis

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Journal of Water Resource and Protection 2019年第8期11卷 995-1023页

作者： yahya Farhan Samer Nawaieh The Trustee Council for Al-Ahliya University Amman Jordan Yarmouk University Department of Geography Irbid Jordan

Soil erosion and high sediment flow are of eminent environmental concern in Wadi Alarab catchment, northern Jordan. The objective of this research is to conduct a prioritization scheme using RS, GIS, and multi-criteria analysis approach based on morphometric analysis, land use/land cover (LULC) change analysis, and soil loss modeling based on RUSLE model factors. ASTER GDEM and Arc GIS were utilized to delineate watersheds and extract the drainage networks using the Arc Hydro tool. Five basic morphometric parameters, five linear and five shape parameters, six LULC classes, and five soil erosion risk classes are applied to prioritize 13 sub-watersheds connected to W. Alarab basin. LANDSAT images were subjected to supervised classification (the Maximum Likelihood Method) to determine land use/cover changes and to establish the LULC map/layer. Soil erosion risk classes were estimated using the RULSE model. RULSE factors (R, k, L, S, C, and P) were calculated in a GIS environment, then multiplied together so as to estimate soil loss (ton·ha-1·yr-1) and to establish a soil erosion risk map for the entire watershed and the thirteen sub-watersheds. A GIS-based integration of the three layers compiled for each criterion reveals that six sub-watersheds (1, 5, 8, 9, 10, and 11) are categorized under low priority. Further, three sub-basins (4, 12, and 13) are fall under moderate priority, and four sub-basins (2, 3, 6, and 7) are designated as of high priority. It is obvious that 53.8% of these sub-basins must be prioritized immediately for soil and conservation measures. The validity of the achieved priority classes was tested statistically using Discriminant Analysis (DA), and the results showed that morphometric parameters, LULC analysis, and soil loss are accepted criteria for prioritization. These results are intended to help decision-makers to prepare reliable soil erosion management plans.

关键词： Prioritization Morphometric Analysis LULC Soil Erosion Modeling Validation Discriminant Analysis (DA)

Ba.k.rs＇ Views Towards Islamic Ba.k.ng and Islamic Ma.k.ting： The Case of Libyan Main Wahda Ba.k.in Benghazi City

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Management Studies 2018年第1期6卷 37-55页

作者： Sabri Elkrghli Abtesam yahya University of Benghazi Benghazi Libya Wahda Bank Wahda Libya

The research topic of this paper is about the transformation process of Libyan Main Wahda Ba.k.to Islamic Ba.k.ng, and how Islamic Ma.k.ting has been practiced in this ba.k. The study aims to investigate ba.k.rs＇ views towards Islamic Ba.k.ng and Islamic Ma.k.ting practices in Benghazi City. Few interviews with ba.k.rs were conducted to design the research instrument, which validated and circulated to ba.k.rs responsible for Islamic Ba.k.ng affairs at Wahda Ba.k. Data were collected and analysed using Statistical Pa.k.ge for Social Sciences （SPSS）. Tests of normality mean scores, T-test, Anova, Correlations and Reliability Analysis were all used in this research paper. The key finding is that there is a consensus among participants that the ba.k.faces numerous challenges including： cultural obstacles, insufficient regulations, increasing environmental challenges, weaknesses of higher authorities responsible for ba.k.ng affairs, weakness of technology, and poor administrative performances. The study exhibited low level of customer satisfaction on Islamic ba.k.ng products ma.k.ted. The study urges the need to develop a governmental Islamic ba.k.ng strategy to focus on spreading Islamic Ba.k.ng and Islamic Ma.k.ting culture. Learning from leading Islamic countries＇ experiences would be a critical future step to develop Libyan ba.k.＇ practices. It also advises reconsidering the current ba.k.ng legislations, and explaining their implications properly. Islamic Ma.k.ting and customer satisfaction measurement should be given a priority in ba.k.s future strategies. Finally, the paper concludes with research limitations, implications and suggests future research.

关键词： Islamic Ba.k.ng Islamic Ma.k.ting Wahda Bank Libya

Multi-Resolution Fourier Analysis Part I: Fundamentals

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International Journal of Communications, Network and System Sciences 2011年第6期4卷 364-371页

作者： Nourédine yahya Bey 不详

In the first paper of this series, we propose a multi-resolution theory of Fourier spectral estimates of finite duration signals. It is shown that multi-resolution capability, achieved without further observation, is obtained by constructing multi-resolution signals from the only observed finite duration signal. Achieved resolutions meet bounds of the uncertainty principle (Heisenberg inequality). In the forthcoming parts of this series, multi-resolution Fourier performances are observed, applied to short signals and extended to time-frequency analysis.

关键词： Multi-Resolution Spectral Analysis Fourier Analysis Resolution Frequency Resolution