84 research outputs found
Applications of well logging techniques to evaluate the groundwater aquifers in the area between southwest Bani Sweif and west Asyoute governorate, upper Egypt
No full textApplications of well logging techniques to evaluate the groundwateraquifers in the area between southwest Bani Sweif and west Asyoute governorate, upper Egypt Safi Eldein.M. Metwally 1, Shimaa. M. Elska 1, *, Fardous. M. Zarif 1, Abdallah. F. Saad 21 Dept. of geophysical exploration, Desert Research Center, Cairo, Egypt 2Dept of Physics., Faculty of Science, Zagazig University, Zagazig, Egypt *Corresponding author: [email protected] AbstractThe relevance of detecting aquifer characterization and aquifer potential has risen with the application of well logging technique as the demand for water has increased. Apart from pumping data, 16 geophysical well logs (resistivity, gamma ray, self-potential, and nuclear logs) are utilized to achieve the main goal of estimating petrophysical parameters (porosity (∅), effective porosity (∅!""), hydraulic conductivity (k), permeability (K) and shale volume
Maximum Entropy Model-Based Spatial Sinkhole Occurrence Prediction in Karap?nar, Turkey
No full textSinkholes in Karapinar and their rapidly increasing occurrence rate are considered one of the main hazards that threaten arable lands and human life. The sudden occurrence and unavoidable characteristics of sinkholes make them more dangerous and challenging to avoid. More than 300 sinkholes have been recorded in the Karapinar region of Konya province in Turkey. There are intensive agricultural activities in the region, and therefore over 60,000 water wells are used to meet the demand. Thus, drought, the effects of climate change and decreasing precipitation rate reveal stress on sinkhole occurrence due to the geological structure of the region and its high tendency to sinkholes since ancient times due to its volcanic history.The primary purpose of this study is to predict possible sinkhole occurrence probabilities in Konya, Karapinar region based on historical occurrences and to report to the authorities to raise awareness about this problem. The Maximum Entropy (MaxEnt) model is applied for sinkhole susceptibility mapping by evaluating 17 variables affecting sinkhole occurrence in meteorological, topographic, environmental, and geological aspects. The results indicated that 458.52 km2 (2.48%) of the study area is highly susceptible to sinkholes. 100 sinkholes were assigned as sample data, and 45 sinkholes were set as test data for the MaxEnt model. The AUC values of training data with 0.978 and test data with 0.963 were calculated where a good correlation was provided. The variables Annual Mean Temperature, Precipitation Seasonality (Coefficient of Variation) Geology, and precipitation, which are mostly responsible for sinkhole formations, have been calculated
Study on the benefits of using the date palm trees residuals in Saudi Arabia for development of the non-traditional wooden industry
No full textAnalysis and modeling of human performance in nuclear power plants
No full textThis work investigates two important areas in human reliability engineering: models for human performance analysis, and reliable data for these models. In the first area, the author addresses the two modeling techniques "THERP" and "SAINT" showing that the flexibility and nuclear relevance of the second give it the merit to be used in modeling and analyzing human tasks in complex man-machine systems such as nuclear systems. A case study is investigated and simulated by the "SAINT" to explore its dynamic capabilities;In the second area, the author evaluates all the available human data sources, develops a new description format for human related events with all the information matrices needed for human reliability analysis. A complete operations data bank for sixty-five commercial power plants in the U.S.A. over a period of ten years is constructed;Data analysis, with qualitative and quantitative evaluations using the information matrices provided in the operations data bank, is presented. Operator error probability computations are made for some operational tasks in selected nuclear engineered safety feature systems. Moreover, the assessment of the role of the performance shaping factors is discussed.</p
Dynamics of three qubit systems in a noisy environment
No full textSome properties of three-qubit systems interacting with a noisy
environment are discussed. The amount of the survival entanglement
is quantified for the GHZ and W states. It is shown that the
entanglement decay depends on the noise type ( correlated or
non-correlated), the number of interacting qubits with the
environment and the initial state which passes through this noisy
environment. In general, the GHZ state is more fragile than the
W state. The phenomena of entanglement sudden death appears in GHZ
state only for non-correlated noise.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author
SPECTROSCOPIC STRUCTURAL INVESTIGATIONS OF CHARGE-TRANSFER COMPLEXES OF n-DONORS AND SIGMA- AND PI-ACCEPTORS
No full textAuthor Institution: Department of Chemistry and Earth Sciences, Qatar University, P.O.Box 2713 Doha, QatarMolecular charge transfer complexes of n-electron donors such as amines, pyridines and polynitrogen cyclic bases with both sigma- and pi-acceptors have been studied spectrophotometrically in chloroform. The reaction stoichiometries were determined using photometric titration methods. The formed CT-complexes are characterized and formulated based on electronic and infrared spectra as well as elemental and thermal measurements
Conceptual study Revolving leadership - a management prospect
No full textEl- Kaffash (1996 a) (1) suggested the concept revolving leadership as a new paradigm with moreexplanatory power to understand the Islamic state in history. El- Kaffash suggested that the political fieldwas not their main field of leadership and that there were other fields like the social, the communal, theeconomic, the scientific and the religious are more prominent fields in the society. Each of these fields hasits own epistemological sphere (episteme) as well as its own leaders, and according to the time and spaceof any event, the leadership revolves among these leaders.El- Kaffash (1996 b) (2) has suggested a new model for understanding and categorizing art according toits effect and influence on the human being. Combining these two models and transplanting them inmanagerial sciences the author is trying to open a new conceptual framework for understanding andenhancing management. Let us first go through different theories of management
Freezing the driven pulsed information of a single qubit
No full textWe use a rectangular pulse to freeze the possibility of estimating the coherent parameters (θ, ) of a single qubit, the local information, and the fidelity of the driven qubit. The possibility of freezing these three quantities depends on the initial state settings and the strength of the pulse. It is shown that the freezing areas increase as the detuning increases, while they decrease at smaller values of the pulse strength. Moreover, as the Fisher information reaches its minimum bounds, the local information and the fidelity are maximized. We show that, when the Fisher information is completely frozen, the pulsed local information and the fidelity are frozen. The freezing degree depends on the initial detuning and the pulse strength. Our results show that, despite the initial and final states of the system being different, the amount of local information is independent of the initial state of the system. These results may be useful in the context of quantum cryptography, teleportation, and secure communication.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author
Clinical research nurse and midwife as an integral member of the Trial Management Group (TMG): Much more than a resource to manage and recruit patients
No full text\ua9 Author(s) (or their employer(s)) 2022. Re-use permitted under CC BY. Published by BMJ. Background: The clinical research nurse/midwife (CRN/M) makes a unique contribution to research delivery in the National Health Service, resulting from a close therapeutic relationship with research participants. Investment in research infrastructure has led to nurses and midwives undertaking extended roles to deliver clinical research and evidence demonstrates the important contributions they make to the clinical research process, quality of research outcomes and most importantly the safe expert care of research participants. The value of the CRN/M\u27s contribution to the broader research team and acknowledgement of the importance of their input, however, remains unspecified and tacit in nature. Aim: To demonstrate the value a CRN/M has on overall trial design and performance when funded as a co-applicant and member of the Trial Management Group (TMG). Method: This briefing paper outlines the development and implementation of the CRN/M role and will describe its impact to promote the benefits of such a role as much more than a resource to recruit and manage participants. Results: Recognising CRN/Ms expertise, knowledge and contribution within this context is a positive step for the research agenda, individual career development and opportunity to introduce innovative ways of working to benefit the research landscape, ultimately contributing to the growth of the body of evidence available to influence patient care. Conclusion: When a CRN/M is funded as a co-applicant and member of the TMG, the role has a positive demonstrable impact on overall trial success
Correction: Enhancing electric vehicle charging performance through series-series topology resonance-coupled wireless power transfer
No full textThere is an error in affiliation 2 for author Idriss Benlaloui. The correct affiliation 2 is: Department of Electrical Engineering, LSPIE Laboratory, University of Batna 2, Batna, Algeri
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