1,355,181 research outputs found
Interview with Muhammad Emara
No full textمقابلة مع المفكر الإسلامي المصري محمد عمارة حول محاولة رسم خريطة للرأي العام العربي والإسلامي تجاه حرب الخليج وهل من الممكن أن تحدث تغيرات في خطوط هذه الخريطة تبعا لسير الأحداث القادمة في حرب الخليج. قامت بالمقابلة إيمان رافع.An interview with the Egyptian Islamic thinker Muhammad Emara about his attempt to draw a map of Arab and Islamic public opinion towards the Gulf War and whether it is possible that changes will occur in the lines of this map according to the course of upcoming events in the Gulf War. The interview was conducted by Iman Rafi
Multiple nucleotide sequence alignment of two conserved motifs in the emaravirus RdRp gene where primers EMARA F7/R8 were designed using Primaclade.
No full textThe alignment of EMARA F7 corresponds to the anti-sense strand of the emaraviruses genome, and EMARA R8 corresponds to the sense strand. The underlined sequence in EMARA R8 shows a customized 5’ non-complementary sequence. Stars above the alignment indicate conserved positions. EMARA F7 and EMARA R8 align to the nucleotide regions 4532–4563 and 4830–4803, respectively, in the anti-sense strand genome of the European mountain ash ringspot-associated virus (AY563040). Both primers are in the Bunya_RdRp conserved domain (PFAM: PF04196) in the emaravirus RdRp gene. (TIF)</p
SPICE-Based Circuit Modelling and Validation of an NFC Energy-Harvesting Strain Sensor for Structural Health Monitoring
No full textStructural Health Monitoring (SHM) demands advanced and reliable systems and circuits capable of continuously detecting environmental and mechanical stressors that may impair the integrity, durability, and stability of critical infrastructure. This study introduces an innovative, untethered, and battery-free solution that combines Near Field Communication (NFC)-powered circuits with flexible strain gauge (SG) sensors for non-invasive SHM, specifically targeting surface-level cracks and deformations. The system is based on a specially designed NFC circuit that handles both energy harvesting and wireless data transmission, enabling seamless deployment in structurally sensitive, remote, or hard-to-reach areas without the need for wiring or extensive modifications. Flexible SGs, configured in quarter- and half-Wheatstone-Bridge arrangements, are bonded to critical components to measure strain and detect crack propagation. The complete system was modelled and simulated using SPICE to evaluate the behaviour of both the strain sensing and the NFC-based wireless energy transfer. Hardware implementation closely matched simulation results, demonstrating full system functionality using a 13.56 MHz NFC link, with optimized power delivery at 2.7 V across an operational distance of up to 4 cm. Both simulations and experimental tests were conducted to investigate the transient and steady-state behaviour of the circuit. The NFC energy harvesting circuit delivered up to 12.5 mW under load conditions. A functional hardware prototype, built using off-the-shelf components, demonstrated the feasibility of the system for autonomous and long-term SHM applications
Report with Radio program presentings of Tarek El-Bishry, Mohamed Emara, and others
No full textتقرير بمقاطع صوتية لعدد من المفكرين والكتاب، مثل طارق البشري ومحمد عماره، حول قضية الرواية السورية "وليمة لأعشاب البحر" والقلق السياسي الذي أحدثته في مصر.A report with A radio program presentings for several intellectuals and writers, including Tarek El-Bishry and Mohamed Emara, discussing the Syrian novel "A Feast for the Seaweeds" and the political commotion it produced in Egypt
Essays on the effect of inflation volatility and institutions on growth and development
No full textThe purpose of this dissertation is to analyze empirically and theoretically the impact of the decrease in inflation volatility versus the impact of the improvement in institutions on growth and development. The first chapter of this dissertation estimates the effects of inflation and inflation volatility on economic growth in the presence of different degrees of legal and financial institutions. The main contribution of this chapter is to show that while the level of inflation does not have a significant effect on growth, which is in line with previous studies; inflation volatility does significantly impact growth even for countries with moderately high levels on inflation. In addition, improving either legal or financial institutions has a statistically significant positive impact on growth and helps to reduce the negative impact of inflation volatility on growth.
The second chapter analyzes the channel through which inflation volatility and financial institutions affect a country's ability to borrow on international capital markets; which affects their ability to invest and therefore grow. The findings of this chapter show that reducing inflation volatility or improving financial institutions will significantly improve a country's sovereign debt rating leading to a drop in its cost of borrowing, which is to be quantified. One important contribution of this chapter is to show that it is inflation volatility that is important in determining a country's sovereign debt rating rather than the level of inflation which has been argued in the literature.
The welfare implications of the decrease in inflation volatility versus the improvement in institutions are quantified in chapter three. This chapter analyzes a micro-foundation based small open economy model that is used to help fully understand the dynamics of a decrease in inflation volatility and an improvement in institutions for a developing economy. The study finds that the welfare effect of improving institutions and of reducing inflation volatility is large with the largest effect being caused by an improvement in financial institutions. One policy implication of these results is that developing economies can get larger welfare gains from improving their institutions than from reducing inflation volatility.Ph.D.Includes bibliographical references (p. 177-188)by Noha Emar
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
A thermo-activated tactile micro-actuator for displays
No full textIn this work we report the design, the fabrication and the characterization of an innovative soft tactile micro-actuator, also called TAXEL (TActile piXEL), which is developed to be integrated in a portable tactile display for providing text content and graphical information to visually impaired people through the sense of touch. It exploits a thermo-active approach, by taking inspiration from common thermometers: the actuator is activated by the thermal deformation of an active material, namely the metallic alloy Galinstan© determined by heating the alloy through an underlying metallic resistor designed to work as a heater. The microfabrication of TAXELs is achieved in several steps consisting in heater fabrication, in SU8 micro chambers fabrication, in the deposition of Galinstan® inside and sealing by a PDMS membrane. Measurements of the TAXEL deformation have been accomplished by measuring the displacement of the PDMS sealing membrane, which is promoted by the expansion of the heated Galinstan® drop. These measurements have been achieved by using the Laser Doppler Vibrometer in the “topography mode “and revealed a total displacement of 50 μm when a tension of 2.4 V is applied at taxel terminals and, according to the Joule's law, a power converted from electrical energy to thermal energy of 7,2 W. © 2018 Elsevier B.V
Variations on the Author
No full text“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Garlic peel-based carbon quantum dots as a sustainable alternative for the sensitive and green spectrofluorometric quantification of molnupiravir in pharmaceutical capsules
No full textSearching for natural alternatives to replace environmentally harmful chemical reagents in analysis is just as crucial as finding easily accessible analytical tools. To reinforce these concepts, this study proposes a simple spectrofluorometric approach using natural carbon quantum dots (n-CQDs) as fluorescence probes for sensitive and environmentally friendly measurement of molnupiravir, an antiviral drug that was initially developed for influenza and has demonstrated potential efficacy against COVID-19. n-CQDs were synthesized using garlic peels (GP), a waste material, via a microwave-assisted method. n-CQDs have a characteristic broad absorbance and narrow emission spectrum, making it easier to analyze several targets. The GP-based n-CQDs showed maximum excitation/emission at 265/347 nm with an acceptable quantum yield. After reaction with molnupiravir, the produced n-CQDs demonstrated unique features to determine the tested analyte. Different factors influencing the synthesis of n-CQDs and their interaction with the studied drug, molnupiravir, were investigated and optimized. Using GP-based n-CQDs as fluorescent probe for measuring molnupiravir byfluorescence (FL), a green analytical approach based on the probes' fluorescence quenching was developed (GP- n-CQDs -QN-FL). The method demonstrated good linearity from 0.5 to 30 μg/mL and detection/quantitation limits of 0.19/0.5 μg/mL. Validation studies confirmed accuracy (98–102 % recovery), precision (<2 % RSD), robustness and selectivity. Various assessment indexes have been utilized to assess the environmental friendliness and suitability aspects of the suggested approach in comparison to other existing techniques. Furthermore, n-CQDs were successfully employed for the precise analysis of molnupiravir in its pharmaceutical capsules. The comprehensive results proved that the method can be deemed eco-friendly and feasible more than the other techniques for its intended purpose for molnupiravir determination in pharmaceutical dosage forms with an average recovery 101.17 %
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