686 research outputs found

    Nursing Intervention for Mothers Having Children Suffering from Acute Bronchitis

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    Context: Acute bronchitis is one of the most common causes of chronic respiratory diseases in childhood with a significant impact on children.Aim: The study aimed to evaluate the effect of nursing intervention on mothers’ knowledge and practices regarding caring for their children suffering from acute bronchitis. Methods: A quasi-experimental design (one group pre/post-test). The study was conducted at the Pediatric Emergency Department and Outpatient clinic in a children's hospital affiliated to Ain Shams University Hospitals. A convenient sample of 52 children newly diagnosed with acute bronchitis accompanied their mothers who were recruited for this study. Two tools were used to collect data: a structured interview questionnaire, and a mothers’ observation checklist. Results: The study shows that there was a highly statistically significant improvement found in the post-test compared to their pre-test, regarding the mothers' knowledge and practices related to the care of their children suffering from acute bronchitis.Conclusion: The implementation of a nursing intervention program improves the mothers' knowledge and practices related to their children with acute bronchitis. These study findings were supporting the study hypotheses. Continuous mothers’ evaluation and monitoring for their knowledge and practices toward children with acute bronchitis are recommended in the pediatric emergency and outpatient clinics. Periodic health education for children and their mothers leads to improving their knowledge and practice regarding acute bronchitis

    Hybrid Wind and Solar Systems Optimization

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    Solar and wind energy systems are considered as promising power-generating sources due to their availability and advantages in local power generation. However, a drawback is their unpredictable nature. This problem can be partially overcome by integrating these two resources or more in a proper combination to form a hybrid energy system. Nevertheless, the harmonization of different energy sources, energy storage, and load requirements is a challenging task. Thus, the performance of various possible configurations has to be investigated to reach the optimum combination using a simulation program. The number of simulations and time required for calculation increases with the increase in number of optimization variables. Therefore, the selection of a quick and accurate optimization technique is very important. Different software packages, such as HOMER and iHOGA, were developed, where each of them is based on a different optimization algorithm

    Optimal Design of Photovoltaic, Biomass, Fuel Cell, Hydrogen Tank Units and Electrolyzer Hybrid System for a Remote Area in Egypt

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    In this paper, a new isolated hybrid system is simulated and analyzed to obtain the optimal sizing and meet the electricity demand with cost improvement for servicing a small remote area with a peak load of 420 kW. The major configuration of this hybrid system is Photovoltaic (PV) modules, Biomass gasifier (BG), Electrolyzer units, Hydrogen Tank units (HT), and Fuel Cell (FC) system. A recent optimization algorithm, namely Mayfly Optimization Algorithm (MOA) is utilized to ensure that all load demand is met at the lowest energy cost (EC) and minimize the greenhouse gas (GHG) emissions of the proposed system. The MOA is selected as it collects the main merits of swarm intelligence and evolutionary algorithms; hence it has good convergence characteristics. To ensure the superiority of the selected MOA, the obtained results are compared with other well-known optimization algorithms, namely Sooty Tern Optimization Algorithm (STOA), Whale Optimization Algorithm (WOA), and Sine Cosine Algorithm (SCA). The results reveal that the suggested MOA achieves the best system design, achieving a stable convergence characteristic after 44 iterations. MOA yielded the best EC with 0.2106533 /kWh,thenetpresentcost(NPC)with6,170,134/kWh, the net present cost (NPC) with 6,170,134 , the loss of power supply probability (LPSP) with 0.05993%, and GHG with 792.534 t/y

    THREE OLD KINGDOM FRAGMENTARY RELIEFS AND THEIR OWNERS

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    This paper aims to publish three fragments preserved in the archaeological store at Atfiyah and belong to three mastaba tombs at Giza; two of them were mostly collapsed. The importance of this paper is due to that two fragments of those in question only contain the names of their owners (the second and the third fragments), while the first one bears some titles without its owner name. Although two fragments bear the names of their owners, these names were frequently repeated in the Old Kingdom which makes it more difficult to determine their identity. So, identifying the persons who held these names is also the aim of this paper. Accordingly, this paper tries to find out the owners of those fragments and their tombs. After examining the names and the titles inscribed on these fragments and after reconstructing and supplementing the texts of the first fragment, the study concluded that the first fragment belongs to KA(⸗j)-xr-PtH:Ftk-tA of the Sixth Dynasty, and the owner of the mastaba tomb G 7652 in Giza, while the second fragment is one of the two stelae of anx 5pss-kA⸗f of the Fifth Dynasty, and the owner of the mastaba tomb G 6040 in Giza. The third fragment is a lintel of 1p-Hr-nfr, the wife of Prj-sn who lived during the middle of the Fifth Dynasty and the beginning of the Sixth Dynasty. This fragment may have been a part of his mastaba tomb LD 78 in Giza.تتهدف تلک الورقة البحثية إلى نشر ثلاثة قطع محفوظة بالمخزن الأثري في أطفيح، وتنتمي إلى بقايا ثلاثة مقابر تهدمت معظم أجزائها. وتکمن أهمية تلک الورقة البحثية في التعرف على أسماء أصحاب تلک القطع الثلاثة؛ حيث إن قطعتين فقط من تلک القطع الثلاثة تحمل أسماء مالکيها (القطعتين الثانية والثالثة)، بينما القطعة الأولى تحمل بقايا ألقاب بدون أي اسم يدل على صاحب تلک القطعة. وتزداد المشکلة أن تلک الأسماء تکرر ظهورها کثيرًا في الدولة القديمة. وبعد فحص الألقاب والأسماء التي وردت على تلک القطع وإعادة ترکيب واستکمال النصوص التي وردت على القطعة الأولى، فقد انتهت تلک الدراسة إلى أن القطعة الأولى تخص المدعو کا خر بتاح فتک تا من الأسرة السادسة، وصاحب المقبرة G 7652 بالجيزة، بينما القطعة الثانية هي لوحة مستديرة القمة من إحدى لوحتين لشخص يدعى عنخ شبسسکاف من الأسرة الخامسة، وصاحب المقبرة G 6040 بالجيزة، أما القطعة الثالثة فهي عبارة عن جزء من عتب يحمل اسم السيدة حتب حر نفرت زوجة المدعو بري سن ، الذي ربما عاش في الفترة ما بين منتصف الأسرة الخامسة وحتى بداية الأسرة السادسة وربما کانت تلک القطعة هي جزء من مقبرته في الجيزة رقم LD 78

    A New Learning Theory-based Framework for Combining Flow State with Game Elements to Promote Engagement and Learning in Serious Games

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    Serious games (SGs) are seen as a clear aid and a potential technique for motivating learners to engage in active and beneficial learning. The creation of SGs is a difficult task. Learning theory, learning aspects (pedagogy and learning materials), and game design are three cross-disciplinary issues related to successful SG design. Numerous studies have looked at this matter and provided guidelines and frameworks for resolving important research concerns. We discovered, however, that research hardly ever discusses the roots of learning theory in SGs. Unfortunately, designing proper SGs is still more of an art than a science. The science of SGs has to be developed on a strong theoretical basis. By illustrating how SGs may be understood from several theoretical viewpoints in learning theory and going through a number of core game design elements that are necessary for successful learning, this paper makes an attempt to solve this issue. Then, in order to encourage engagement and learning in SG contexts, we provide a new framework for the design and development of SG models that makes it easier to combine flow state with such game elements. The agile software process model serves as the basis for the development process in our system. The Unified Modeling Language was used to model prototypes and diagrams. A case study entitled One day without the use of computer-based intervention technologies was used to demonstrate the effectiveness of the proposed framework

    Power Quality Issue of Grid Connected DFIG Wind Farm System

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    Quality of power is known as any power problem manifested as a non-standard frequency, current and voltage which cause failure of end customer apparatus. The wind utilization, generation and its penetration in utility grid are increasing worldwide. One of the master issues in wind generation is the insertion to the network. When the wind energy is injected to the grid generally controls the voltage disturbances on the system power quality, variation of voltage is the almost prevalent kind of disturbance which affects stability and the quality of power for grid-inserted wind system. This study investigates the two widespread kinds of voltage variations such as voltage dip and swell, which can happen if large amount of wind system is connected to an electrical grid. This research also studies the response and performance under faults of a wind farm inserted to distribution systems. In this paper, a wind turbine with induction machine (DFIG) is simulated by using MATLAB/Simulink program. The simulated model is subjected to disturbances which known as; voltages (dip and rise). The results of simulation presents that, how both variations; voltage dip & voltage rise lead to mal-operation as well as shut-down of entire system, therefore deteriorating the improvement of power quality for the grid

    Tautness and applications of the Alexander-Spanier cohomology of K

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    The aim of the present work is centered around the tautness property for the two K-types of Alexander-Spanier cohomology given by the authors. A version of the continuity property is proved, and some applications are given

    The European system and the Egyptian question 1827-1841 : a study in the theory of balance of power

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    Ankara : The Department of International Relations and Institute of Economics and Social Sciences, Bilkent Univ., 1996.Thesis (Ph.D.) -- Bilkent University, 1996.Includes bibliographical references leaves 289-295.This work aims at explaining the events of the Egyptian Question through the tools of balance of power theory. It is the main hypothesis of this work that the Egyptian Question affected the balance of power in Europe, i.e. Equilibrium, and therefore, was subjected to the mechanics of balance of power. It is further believed that the reactions of the major European powers were in full conformity with this mechanics. The first chapter explains the theory of balance of power and its major concepts. In the following chapter, these concepts are applied to the European system o f interstate relations, tracing it from the Treaty of Westphalia. The third chapter explains the link between Egypt and the European system, as well as the rise of the Egyptian Question. Chapter four deals with the effect of the Egyptian intervention in the Wars of Morea 1827, Anatolia 1832-3 and the European system. The final chapter is the mechanics of balance of power applied to pacify the Egyptian Question.Abd El Sattar El Badri, MohammedPh.D

    A validated stability indicating HPLC method for determination of sitagliptin

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    A comparative and stability-indicating reversed phase high performance liquid chromatographic study have been developed and validated for sitagliptin phosphate. The liquid chromatographic determination was achieved isocratically on Poroshell 120 EC-C18 (100 × 4.6 mm, i.d.; particle size, 2.7 µm), Pursuit 5PFP (150 × 4.6 mm, i.d.; particle size, 5 µm) and Chromolith performance RP-18e (100 × 4.6 mm, i.d.; macropore diameter, 2 µm) columns using a mobile phase consisting of methanol:water:triethylamine:acetic acid (60:40:0.1:0.1; v:v:v:v), at a flow rate 0.5 mL/min and UV detection at 268 nm. The method was linear over the concentration range of 100-1000 µg/mL (r = 0.9998) with a limit of detection and quantitation of 10 and 30 µg/mL, respectively. All the validation parameters and stability indicating study were studied on Poroshell 120 EC-C18 column, which achieved the best separation. The proposed method has been found to have the required accuracy, selectivity, sensitivity, and precision to assay sitagliptin phosphate in bulk form and in a pharmaceutical dosage form. Degradation products resulting from the stress studies did not interfere with the detection of sitagliptin phosphate that indicates that the assay are stability-indicating assay
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