15 research outputs found
City Architectural Heritage Revival: The Need of a New Applied Approach
No full textEgypt is a nation of 4000 years of civilization, which was known for its ancient architecture that occupied the highest rank of importance, but how long will our neglected heritage sites survive in our recent era? This is a rising debate. This paper is based on a hypothesis whether the conservation of the neglected or isolated heritage sites, particularly in the inhabited areas, can bind the citizens to their past. For this reason, the research provides scenes of many applied conservation practices in other countries. The study calls for developing a new applied approach of conservation that takes the interaction between citizens and the city heritage zones into consideration
Towards Effective and Sustainable Urban Parks in Alexandria
No full textAbstractUrban parks are now viewed as an important part of the urban and neighborhood development rather than just recreation and leisure facilities. They are oriented for multifunctional services. Besides, they play an important role in improving the environment and landscape conditions that result in green spaces which have become an essential part in cities due to their strategic importance for the quality of life. As the world's urban population increases, urban areas encounter new problems such as: uncontrolled use of resources, greenhouse effect, ozone depletion, …… etc. To face these problems of urban areas, sustainable urban parks have become a significant urban planning policy and development approach.The city of Alexandria (Egypt) is rich with its urban parks such as Al Montazah Park, Al Shalalat Park and Antoniadis Park. However, the lack of coordination of physical planning activities within the city, has resulted into an unpleasant quality of the environment and decrease in the number of sustainable urban parks. Moreover, urban population has rapidly increased, thus the city of Alexandria has been enlarged and gradually human relations with nature have been damaged. For these reasons, people in Alexandria have lost the opportunity to come in contact with nature.The paper will discuss the causes of decreasing urban parks and its effects on people's health and the significant need to improve these spaces to develop the city and achieve sustainability. It will also highlight the important role of urban parks and their design strategies. It will analyze an international example which was transformed to provide a high quality of living environment presenting the suggested ways to create sustainable open spaces as an integrated part of a sustainable city. Finally, the paper will focus on developing Al Montazah urban park in Alexandria to achieve sustainability. The aim of the paper is to transform urban parks within the environment of Alexandria to improve and enhance the quality of life in order to reach a sustainable city
Do Unions Matter? Trade Reform and Manufacturing Wages in South Africa-super- †
No full textThe effect of nominal tariff cuts on industry wage differentials has been the subject of a number of recent empirical studies. In this paper we investigate the latter relationship with respect to the South African trade reform experience using micro-level labour data for the period from 1995 to 2004. Our study extends on the existing literature in two respects: first, we are the first controlling for the potential effect of labour market institutions, such as collective bargaining power, in assessing the relationship between tariffs and industry wages. Second, we account for general equilibrium effects by controlling for the impact of changes in effective tariff rates. On the one hand, we find that only wages in industries with levels of unionisation beyond a certain threshold were adversely affected by tariff cuts. This negative effect is exacerbated by the extent of sectoral union power. The reported large magnitudes of the tariff impact on wages is in line with the considerably high mark-ups documented for South Africa. On the other hand we find some evidence suggesting that wages in industries with union power below the threshold were positively affected by the tariff cuts. This evidence suggests the omitted variable bias resulting from not controlling for industry heterogeneities in bargaining power when examining the wage--trade relationship. Copyright 2010 The author 2009. Published by Oxford University Press on behalf of the Centre for the Study of African Economies. All rights reserved. For permissions, please email: [email protected], Oxford University Press.
Evaluasi Buku Ajar Bahasa Arab Kelas X Madrasah Aliyah: Pendekatan Saintifik Kurikulum 2013
No full textThis study aims to evaluate Arabic teaching materials in Islamic High School (Madrasah Aliyah). The purpose of this evaluation is to find out the quality of Arabic textbooks for class X based on the 2013 curriculum, published by the Ministry of Religious Affairs Republik Indonesia in 2014. The 2013 curriculum is a curriculum based on character and competence that requires children to be active in learning. The Arabic language textbooks are evaluated using a scientific approach to know the quality. In this study, the author uses descriptive qualitative methods, namely by emphasizing the aspect of understanding quality in depth to a problem and the results are not in the form of numbers, then systematically describing the facts and characteristics of the objects and subjects studied appropriately. The evaluation results of this teaching material show that from the aspect of presentation it has been systematic, coherent, consistent, and balanced between the chapters. From the aspect of supporting the dish, it does not contain a complete list of supporters. What's more, the connection of sentences is rather complicated. Meanwhile, from the linguistic aspect, there are still some misconceptions, especially in the use of alif and hamzah.This study aims to evaluate Arabic teaching materials in Islamic High School (Madrasah Aliyah). The purpose of this evaluation is to find out the quality of Arabic textbooks for class X based on the 2013 curriculum, published by the Ministry of Religious Affairs Republik Indonesia in 2014. The 2013 curriculum is a curriculum based on character and competence that requires children to be active in learning. The Arabic language textbooks are evaluated using a scientific approach to know the quality. In this study, the author uses descriptive qualitative methods, namely by emphasizing the aspect of understanding quality in depth to a problem and the results are not in the form of numbers, then systematically describing the facts and characteristics of the objects and subjects studied appropriately. The evaluation results of this teaching material show that from the aspect of presentation it has been systematic, coherent, consistent, and balanced between the chapters. From the aspect of supporting the dish, it does not contain a complete list of supporters. What's more, the connection of sentences is rather complicated. Meanwhile, from the linguistic aspect, there are still some misconceptions, especially in the use of alif and hamzah
Higher stability and better photoluminescence quantum yield of cesium lead iodide perovskites nanoparticles in the presence of CTAB ligand
No full textInorganic halide perovskites, such as CsPbI3, have unique optoelectronic properties which made them promising candidates for several applications. Unfortunately, these perovskites undergo rapid chemical decomposition and transformation into yellow δ-phase. Thus, the synthesis of stable cesium lead iodide perovskites remains an actual challenging field and it is imperative to develop a stabilized black phase for photovoltaic applications. For this purpose, a surfactant ligand was used to control the synthesis of inorganic perovskite CsPbI3 nanoparticles. Herein we demonstrate a new avenue for lead halide perovskites with the addition of either hexadecyltrimethylammonium bromide (CTAB) or silica nanoparticles to maintain in the first place; the stability of the α-CsPbI3 phase, and later on to boost their photoluminescence quantum yield (PLQY). The prepared perovskites were characterized using UV–visible absorption spectroscopy, fluorescence spectroscopy, scanning electron microscopy, thermogravimetric analysis and X-Ray diffraction technique. Results show higher stability of α-CsPbI3 phase and improvement in PLQY % to reach 99% enhancement in presence of CTAB. Moreover, the photoluminescence intensity of CsPbI3 nanoparticles was higher and was maintained for a longer duration in the presence of CTAB. Graphical abstract: [Figure not available: see fulltext.]. © 2023, The Author(s), under exclusive licence to European Photochemistry Association, European Society for Photobiology
Use of genetic algorithms in operations management. Part II - Results.
No full textThe insight gained into the relationship between genetic algorithm (GA) structure and optimisation performance, through the research reported in this paper, provided the knowledge to integrate GAs with discrete event simulation which formed the output from IMI EPSRC Project GR/N05871 ‘Responsive Design and Operation of Flexible Machining Lines’ rated by EPSRC as “Tending to Internationally Leading” where industrial partners included [email protected], Unipart Group Ltd and [email protected], Preactor International. The author was Principal Investigator for the project
Use of genetic algorithms in operations management. Part I: Applications.
No full textThis output reports application solutions being further advanced and exploited as part of two DTI Technology Programme research projects, ie (i) £1.4 million H0254E ‘Improving customer demand and cost forecasting methods’ where industrial partners include [email protected], Unipart Logistics and [email protected], Trelleborg Industrial AVS, and (ii) £1.0 million K1532G ‘Accelerated Process Excellence using Virtual Discrete Event Process Simulation’ where industrial partners include [email protected], Perkins Engines Group Ltd and [email protected], Intier Automotive Interiors. The author is Principal Investigator for both projects
Selective Detection of Silver Ions Based on Resonance Rayleigh Scattering Spectrometry Using Colloidal Silica Nanoparticles
No full textColloidal silica or silicon dioxide nanoparticles (SiO2 NPs) are extremely amorphous nanomaterials owing spherical shape. These nanoparticles have gained much interest due to their usage in various fields; going from the industrial domain to the biomedical field. In this study, the synthesis of SiO2 NPs was investigated and optimized by varying two essential parameters including the type of silica precursor and the concentration of sodium hydroxide. The suitable nanoparticles were formed according to the best silica precursor (Colloidal Silica) and the optimum NaOH concentration (C = 100 mM). The applicability of the prepared nanoparticles was performed for the detection of silver ions in the concentration range between 5 and 300 μM based on resonance Rayleigh scattering (RRS) spectrometry. The limit of detection obtained was equal to 130 nM and the recovery percentage was between 98.4 and 100.4%. The detection of silver ions based on RRS technique was find to be easy to manipulate, simple and fast with low cost, compared to the usual techniques used as chromatography and calorimetric techniques. © 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature
Interaction of Curcumin with Poly Lactic-Co-Glycolic Acid and Poly Diallyldimethylammonium Chloride By Fluorescence Spectroscopy
No full textPoly Lactic-Co-Glycolic Acid (PLGA) and Poly Diallyldimethylammonium Chloride (PDDA) are widely being used for drug delivery and curcumin is being studied as potential drug molecule for its anti-oxidant, anti-inflammatory and anti-cancer activities. The interaction between PLGA, PDDA and curcumin was investigated by fluorescence spectroscopy. The modified Stern–Volmer equation was used to estimate the value of the binding constant Ka and the van't Hoff equation was used to estimate the corresponding thermodynamic parameters (ΔHo, ΔSo, and ΔGo). The obtained results showed that the binding constant between PLGA and Curcumin is due to the formation of hydrogen bonds and van der Waals forces. However, PDDA interacts with curcumin through hydrophobic interactions. Moreover, zeta potential measurements were obtained for these polymers and the surface charge was compared in presence and absence of the negatively charged curcumin molecules. It was found that the results obtained by zeta potential measurements are in agreement with those obtained by fluorescence spectroscopy. It is also found that binding of curcumin with PDDA is further encouraged in the presence of PLGA. © 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature
Predicting the effects of common levels of variability on flow processing systems.
No full textThe simulation models reported are being employed within a £101k EPSRC Life Sciences Interface Programme cross-disciplinary research project E057020 ‘Discrete Event Simulation of Biological Control Processes and its Application to Autonomous Decision-Making in Manufacturing Systems’ where Maria Schilstra, ([email protected]), University of Hertfordshire is a collaborator. The reported methodology will also form an essential component of the £1.0 million DTI Technology Programme research project K1532G ‘Accelerated Process Excellence using Virtual Discrete Event Process Simulation’ where industrial partners include [email protected], Perkins Engines Group Ltd and [email protected], Intier Automotive Interiors. The author is Principal Investigator for both project
