53 research outputs found
Crystalline phase, surface morphology and electrical properties of monovalent-doped Nd0.75Na0.25Mn1-yCoyO3 manganites
No full textPerovskite-type manganites Nd0.75Na0.25Mn1-yCoyO3 (y = 0 – 0.05) have been investigated to clarify the influence of Co-doped on crystal phase and morphological study as well as electrical transport properties. The Nd0.75Na0.25Mn1-yCoyO3 samples are prepared via solid state synthesis method. X-ray diffraction analysis revealed all the samples are essentially single phased and the peaks are indexed to an orthorhombic structure with Pnma space. The morphological study from scanning electron microscope shows the improvement of the grains boundaries and sizes as well as the compaction of particles can be seen as cobalt doping increased. On the other hand, the temperature dependence of electrical resistivity measurements using four-point-probe technique indicates all samples maintained an insulator like behaviour down to low temperature. Analysis of the resistivity change with respect to temperature, dlnρ/dT-1 versus T reveals a slope changes of resistivity has been observed and a boarder peak exist for y = 0 sample and the peaks become significantly obvious for y = 0.02 and 0.05 samples. The peaks are observed in the range of charge ordering (CO) transition indicate the existence of CO in the system
The system of arbitration in the U.A.E. : problems and prospects.
No full textSIGLEAvailable from British Library Document Supply Centre- DSC:D174123 / BLDSC - British Library Document Supply CentreGBUnited Kingdo
UNDERGROUND CRUDE OIL PIPELINE LEAKAGE DETECTION USING DEXINED DEEP LEARNING TECHNIQUES AND LAB COLOR SPACE
No full textComputer vision plays a big role in pipeline leakage detection systems and is one of the latest techniques. Still, it requires a powerful image-processing algorithm to detect objects. The purpose of this work is to develop and implement spill detection in oil pipes caused by leakage using images taken by a drone equipped with a Raspberry Pi 4. The acquired images are sent to the base station along with the global positioning system (GPS) location of the captured images via the message queuing telemetry transport Internet of Things (MQTT IoT) protocol. At the base station, images are processed to identify contours by dense extreme inception networks for edge detection(DexiNed) deep learning techniques based on holistically-nested edge detection(HED) and extreme inception (Xception) networks. This algorithm is capable of finding many contours in images. To find a contour with black color, the CIELAB color space (LAB) has been used. The proposed algorithm removes small contours and computes the area of the remaining contours. If the contour is above the threshold value, it is considered a spill; otherwise, it will be saved in a database for further inspection. For testing purposes, three different spill areas were implemented with spill sizes of (1 m^2,2 m^2 ,and 3 m^2). Images have been captured at three different heights (5 m, 10 m, and 15 m) by the drone used to capture the images. The result shows that effective detection has been obtained at 10 meters high. To monitor the entire system, a web application has been integrated into the base station
Does the participation in CSR activities enhance information diffusion? Evidence from US firms
No full textThe purpose of this paper is to investigate the impact of corporate social responsibility (CSR) on firm-specific information diffusion from 1,219 non-financial US firms between 2000 and 2012. By using Arellano-Bond dynamic panel-data estimation, we found evidence that suggests that stock prices of socially responsible firms have higher levels of firm-specific information diffusion. However, the size of firms plays a negative moderating role in this relationship. There is a positive and significant relationship between primary (technical) CSR activities and information diffusion among larger firms, while this relationship is reversed for secondary (institutional) CSR activities for similar firms. This study contributes to existing literature by providing empirical evidence on the CSR-Informativeness relationship, the moderating role of firm size and identifying the importance of primary stakeholders' CSR in US firms. This study has important policy implications for company management as it provides legitimacy to their CSR engagements, and to investors that CSR engagements should be considered as pricing factor
Hafidh Muhammed b. Omar ai-Imadi and edition critique of his book "Mufradat al-Qurra al-Sab"
No full textBu araştırma, Hafız İmadi'nin (ö. h.783) Mufredatu'l-Kurrai's-Seb'a adlı eserinin tahkikidir. Kitabın başlangıcından İbn Amir eş-Şami müfredesine kadar tahkik edilmiştir. Müellifinin VII. asrın alimlerinden ve disiplininde gözde bir isim olmasından dolayı bu eser, kıraat ilmi hususunda önemli bir eser sayılmaktadır. Çalışmada kariler ayrı bir şekilde incelenmektedir, ihtilaf ve ittifak yönleri ortaya koyulmaktadır. Yapıtta özellikle usulde ilkeleri ihlal etmeyen bir özetleme/ihtisar, ferşte gerekli olan şekilde detaylara girilme metodu benimsenmiştir. Bu tez giriş, dört bölüm, Sonuç ve ön sözden oluşmaktadır. Girişte eserin öneminden, seçilme nedeninden ve çalışma planından bahsedilmektedir. ve kıraat ilmi tanımlanmış, yedi harf ile kıraat ilmi arasındaki farklar açıklanmış, sahih kıraatin esasları vurgulanmıştır. Müfredeler tarif edilmiş, yedi mütevatir kıraatin imamları ve ravileri, Şatıbiyye tarikine göre anlatılmıştır. Birinci Bölüm: Müellifin hayatına dair kısa bir çalışma içermektedir. İkinci Bölüm: Kitaba ilişkin muhtasar bir araştırma barındırmaktadır. Üçüncü Bölüm: İmadi'nin Mufredatu'l-Kurrai's-Seb'a genel bilgiler. Sonuç bölümünde araştırmada ulaşılan en önemli sonuçlar ortaya konmuştur: - Kitabın İmam İmadi'ye nisbetinin doğruluğu ve başkalarına yapılan atıfların yanlışlığını ispatlanmıştır. - İmadi'nin biyografisi mevcut imkanlar çerçevesinde sunulmuş, kendisinin kıraat alanında mühim bir yeri olduğu vurgulanmıştır. - İmam Ahmed b. Halil el-Ferahidi'den nakledilen yedi harfin yedi kıraat olduğunu söyleyen görüşün doğru olmadığı, yedi kıraati toplayan alim Mücahit onun vefatından 75 sene doğduğu saptanmıştır. Dördüncü Bölüm: Tahkik hususunda üç nüshanın karşılaştırılması yapılmış, dipnotta nüsha farkları belirtilmiş, gerekli açıklama ve yorumlarla birlikte sunulmuştur.
This thesis is the investigation and study of the (Mufradat Alq-urrat AlSabea) book by Al-Emadi (T 783) from the beginning of the book to the Imam Ibn Amer Al-Shami. This book presented as one of the most important books in the science of the "Al-Qurra'" with mentioning the agreement and the difference between the narrators in a manner that combines the unkind abbreviation especially in the fundamentals and the verbiage which are not boring especially in the science of "Al-Farsh". Where it has been worked on according to the method of achieving scientific research, it consists of an introduction and two sections; The introduction: contains the importance of the topic, the reason for its selection and the research plan. And the first section is The study: It contains a preamble, and three chapters, and its conclusion. While the preamble contains: Introducing the science of readings, and explaining the difference between the seven letters and the seven readings, as well as the conditions for accepting readings, and then introducing vocabulary and the most important literature in it and then the definition of the seven readers and their narrators and their methods of "AlShatbyah". As for the first chapter: it contains a brief study about the author. The second chapter contains a study about the book. The third chapter contains General information about the "Al-Mofrdat". The last part is the conclusion: I mentioned the most important findings of the study, including (Determining the author of the (Mufradat Alq-urrat Al-Sabea) book and its attribution to Imam Muhammad bin Amr Al-Emadi (T. After 783) and proof of his fault attributed to others, detection of a translation; And if it was not sufficient for al-Emadi, may God have mercy on him, and to prove the year of his death, while emphasizing that al-Emadi, may God have mercy on him, is a distinguished scholar who is proficient in the sciences of readings and the Arabic language and clarification and statement of the prevailing error that Imam Ahmed bin Khalil Al-Farahidi had interpreted the seven letters with the seven famous readings Especially if we know that Ibn Mujahid who collected the seven recitations was born after the death of Al-Farahidi by (seventy-five years).). The second section: The investigation: The complete investigative text was mentioned in it after his interview in three written copies, and the difference between them was fixed in the margin with comment and clarification on what needs to be clarified
Khartoum Summit and its impact on Saudi-Sudanese relations in 1967
No full textThe research highlighted the role of the Sudanese government in ending the conflict between Arab countries, especially between the Kingdom of Saudi Arabia and Egypt, over Yemen, through the role played by the Sudanese Prime Minister, Muhammad Ahmad Mahjoub, in the success of the Khartoum Conference in 1967, after convincing the Saudi side and Egypt to attend the conference, and urged them to unify Arab efforts and unity of the Arab ranks to confront the Zionist entity and recover all Arab lands from the Zionist entity that it occupied During the June 5, 1967 war, as well as urging it to join forces with all Arab energies after Arab leaders felt responsible as a result of losing that war, and securing the withdrawal of the Zionist entity from Arab lands through political action at the Arab and international level within the scope of its three principles: There is no peace with the Zionist entity There is no recognition of the Zionist entity or negotiations with the Zionist entity
Molecular Docking and In Vitro Studies of Synthesized Oxadiazole Derivatives as Urease Inhibitors
No full textA novel sequence of 1,3,4-oxadiazoles (7a–h) was synthesized. The compounds were characterized by IR, ¹H NMR, and MS analyses. They were also examined to determine whether they could prevent urease from functioning. Molecular docking was done with AutoDock Vina, and the findings were visualized in Discovery Studio. The H NMR spectra showed peaks at δ 10.20 to 10.69 ppm for NH protons, δ 7.16 to 8.01 ppm for aromatic protons, and δ 4.21 to 4.37 ppm for 2H and CH₂ groups, confirming the structural details. The EI-MS spectra showed molecular ion peaks at 337 m/z with an intensity of 14-67%. Among the bioactivity-tested compounds, 7d resulted in robust activity with IC50 values of 161.6 ± 5.8 µM; compound 7e exhibited the weakest activity, at 453.6 ± 5.8 µM; and no inhibition was discovered by the 7a, 7f, and 7h compounds when compared to the Thiourea, at 21.8 ± 1.51 µM. Molecular dockings confirmed compound 7d as the best-docked complex, with a minimum energy of -7.4 kcal/mol, an RMSD value of 1.573 Å, and hydrogen interactions at His593 with the active site residue, confirming the experimental results. It was determined that 1,3,4-oxadiazoles can be employed as urease inhibitors
Molecular Docking and In Vitro Studies of Synthesized Oxadiazole Derivatives as Urease Inhibitors
No full textA novel sequence of 1,3,4-oxadiazoles (7a–h) was synthesized. The compounds were characterized by IR, ¹H NMR, and MS analyses. They were also examined to determine whether they could prevent urease from functioning. Molecular docking was done with AutoDock Vina, and the findings were visualized in Discovery Studio. The H NMR spectra showed peaks at δ 10.20 to 10.69 ppm for NH protons, δ 7.16 to 8.01 ppm for aromatic protons, and δ 4.21 to 4.37 ppm for 2H and CH₂ groups, confirming the structural details. The EI-MS spectra showed molecular ion peaks at 337 m/z with an intensity of 14-67%. Among the bioactivity-tested compounds, 7d resulted in robust activity with IC50 values of 161.6 ± 5.8 µM; compound 7e exhibited the weakest activity, at 453.6 ± 5.8 µM; and no inhibition was discovered by the 7a, 7f, and 7h compounds when compared to the Thiourea, at 21.8 ± 1.51 µM. Molecular dockings confirmed compound 7d as the best-docked complex, with a minimum energy of -7.4 kcal/mol, an RMSD value of 1.573 Å, and hydrogen interactions at His593 with the active site residue, confirming the experimental results. It was determined that 1,3,4-oxadiazoles can be employed as urease inhibitors
Combination of advanced coagulation Fe(VI) and UF membrane to effectively remove organic compounds and mitigate biofouling during harmful algal blooms
No full textThe effect of different coagulants on the performance of UF membranes to treat seawater containing algal blooms was investigated. The results highlight that using advanced coagulant ferrate (Fe(VI)) in the process prior to the UF process enhanced the membrane permeability and substantially reduced biofouling. Removal of UF process was enhanced with the use of ferrate and removal efficiency of 99 %, 71 %, 98 %, 99 %, and 100 % for turbidity, TOC, ATP, bacteria, and TEP, respectively was achieved. In addition, the treated feed with ferrate led to a thinner fouling layer on the UF membrane surface compared to the layer that was formed with the use of ferric chloride which was thicker and denser. High water flux with a value of 831.0 ± 27 L.m−2.h−1.bar−1 was obtained when algal-laden seawater was treated with the advanced coagulant before the UF process, compared to the value of 602 ± 11 L.m−2.h−1.bar−1when a traditional coagulant was used. Indeed, use of the advanced coagulant ferrate in a hybrid coagulation/UF process could be a promising system to substantially enhance seawater quality, decrease operational cost, and increase the membrane life-expectancy.The research reported was supported by King Abdullah University of Science and Technology (KAUST), Saudi Arabia
Profit-Sharing Deposit Accounts in Islamic Banking: Analysing the Perceptions and Attitudes of the Malaysian Depositors
No full textIslamic banking deposits are fundamentally structured in a different way than the conventional banking deposits. Each type of Islamic banking deposits, such as savings, demand, and timed deposits, is devised using the approved Shari’ah contracts such as qard, wadiah, murabahah, and mudarabah. These contracts are opposed to the conventional concepts, as they are based on the concept of a ‘lender-borrower’ relationship. In addition, the Shari’ah-approved contracts are unique as they feature a different nature of risk and return. This is especially the case for mudarabah contracts (henceforth referred to as profit-sharing contracts). The uniqueness of profit-sharing contracts in deposit products has been given due recognition in theory and also in practice, as most of the Islamic banks in Malaysia offered this product. In addition, the unique features and characteristics of profit-sharing based deposit accounts are also highlighted in the prudential standards issued by prominent regulatory bodies such as AAOIFI and IFSB which, have been adopted by the Bank Negara Malaysia (Central Bank of Malaysia).
Nevertheless, it is argued by many Islamic banks practitioners, especially in Malaysia, that the concept of profit-sharing in deposits products is not practical in reality, because the depositors do not behave according to, nor accept the principles that have been laid down in the Shari’ah. Thus it is argued that both the depositors and the Islamic bankers have treated the product similar to any other conventional banking deposits products.
The main aim of this study, hence, is to explore and examine the level of awareness, knowledge, perceptions, and attitude of the Islamic banking depositors in Malaysia towards characteristics of profit-sharing deposits accounts in accordance with the fundamental Shari’ah principles but also the regulations prevailing. In addition, this research also attempts to explore the significant determinant factors that encourage the depositors to engage with Islamic banking deposits accounts in general and profit-sharing deposits accounts in particular.
In fulfilling the aim of the study, primary data collection research was adopted through a survey questionnaire technique. The questionnaires were distributed to eight Islamic banks representing various types of Islamic banks in Kuala Lumpur and Selangor. The questionnaire asked various pertinent questions, which intended to elicit the depositors’ opinions, perceptions, and attitudes towards the unique characteristics of profit-sharing contract as specified in Shari’ah muamalah principles. The characteristics among others are: (i) concept of uncertain deposits returns; (ii) concept of non-guarantee for the deposits; (iii) concept of profit equalization reserve. A total 649 of the returned questionnaires were complete and fit for analysis purpose. The data were analysed using various statistical analysis techniques ranging from simple frequency distribution analysis to the more advanced analyses such as non-parametric statistical analysis, factor analysis, and logistic regression.
In general, the results of the study show that the level of awareness of the need to have Islamic banking deposits accounts because of religious reasons is considered as high among the Malaysian depositors. Nevertheless, the results also indicate that a high level of awareness is not being translated into a high level of understanding concerning the objectives of the products which are structured in accordance to the Shari’ah-compliant contracts. This can be seen in the major findings of this study: the characteristics of profit-sharing contracts, which arguably are the most desirable Shari’ah-compliant contracts, are not acceptable to the depositors. This indirectly implies that they are still strongly influenced by the nature of conventional banking products. In addition, the logistics regression results further proved that related factors (‘financial services’ and ‘income’) emerged as the main determinants in creating demand for profit-sharing deposits accounts.
The results of the research should draw the attention of the Islamic bankers and also the regulators to finding ways for improving the level of understanding among the depositors. However, the critical successful factor in educating the depositors is highly dependent on the level of knowledge exhibited by the Islamic bankers themselves, which can be a real concern as highlighted by the findings of this study
- …
