75 research outputs found
Jean-François Breton et Muhammad 'Abd Al Qàdir BàfaqIh, avec M. 'Amir, R. Audouin, M. BaPafïr, F. Baratte, J. Barrera, M. Kazanski, J. Koltès, Ch. Robin, J.-C. Roux, S. Tassinari, Kh. Az-Zubaydï, Trésors du wādī Dura (République du Yemen), Fouille franco- yèmènite de la nécropole de Hajar am- Dhaybiyya, (Bibliothèque archéologique et historique, tome 141)
No full textBron François. Jean-François Breton et Muhammad 'Abd Al Qàdir BàfaqIh, avec M. 'Amir, R. Audouin, M. BaPafïr, F. Baratte, J. Barrera, M. Kazanski, J. Koltès, Ch. Robin, J.-C. Roux, S. Tassinari, Kh. Az-Zubaydï, Trésors du wādī Dura (République du Yemen), Fouille franco- yèmènite de la nécropole de Hajar am- Dhaybiyya, (Bibliothèque archéologique et historique, tome 141). In: Syria. Tome 72 fascicule 1-2, 1995. pp. 279-281
Importance Sampling for a Markov Modulated Queuing Network with Customer Impatience until the End of Service
No full textFor more than two decades, there has been a growing of interest in fast simulation techniques for estimating probabilities of rare events in queuing networks. Importance sampling is a variance reduction method for simulating rare events. The present paper carries out strict deadlines to the paper by Dupuis et al for a two node tandem network with feedback whose arrival and service rates are modulated by an exogenous finite state Markov process. We derive a closed form solution for the probability of missing deadlines. Then we have employed the results to an importance sampling technique to estimate the probability of total population overflow which is a rare event. We have also shown that the probability of this rare event may be affected by various deadline values.Importance Sampling, Queuing Network, Rare Event, Markov Process, Deadline
Astrology in literature: how the prohibited became permissible in the Arabic poetry of the mediaeval period
No full textThis thesis is concerned to position the art of astrology within the context of classical Arabic poetry, primarily by investigating and elucidating attitudes to the notion of
qadar (fate) and the ideology in which it was embedded. These attitudes were revelatory of the broader world view of the Arabs of those periods, and their shifts from those held in the pre-Islamic and early Islamic eras tell us a good deal about the importance given to the nature and role of fate and about the various understandings of its influence. The pre-Islamic Arab's notion of qadar was in some ways similar to that of the early Muslims: both emphasised predetermination and the irresistible power of fate. But while the jahilf (Pre-Islamic) Arabs identified fate with the malign power of dahr (Time), the Muslims believed the power of fate lies in the hands of God the
Omnipotent, who alone is responsible for the fate of the whole universe. Thus the astrology of the pre-Islamic era was one aspect of divination (kihana) and claimed to be
able to reveal in advance an individual's destiny, which could be avoided by taking certain precautions. These precautions, however, were considered effective only in
relatively trivial cases; they were useless in the areas of major impact: a person's happiness or misery (shaqiiwa aw sa ada), sustenance (rizq) and one's term (ajal), the
three inevitable and irresistible manifestations of fate. In the Islamic period not only these major aspects of life are governed and controlled by the Omnipotent; the destiny
of the universe, in even its most minute details, is determined and controlled by God alone. Astrology was considered to be of no value whatsoever, and its practitioners were subject to the death penalty. These two irreconcilable views are evident in early Islamic poetry, which reflected clearly the response of poets, and society, to astrology from the perspective of qadar.
When the orthodox caliphate was replaced by dynastic rule the status of astrology was changed dramatically. The idea that the stars, as indicators, play a role in the life of
human beings found popowerful supporters in some governors of the Islamic world, who allowed astrology to fulfil a public function regardless of the hostility of the official
religion of that society. This social phenomenon generated rich material of a controversial character in the realm of literature. Investigating the factors, motivations
and impact of mediaeval political, theological and philosophical attitudes to astrology, in relation to the notions of free will and predestination, is the concern of this study
Phytochemical screening and preliminary investigation of momordica charantia extracts for antimicrobial deodorant applications
No full textThis preliminary research investigates the potential of Momordica charantia (bitter melon) extracts which is momordicine - a triterpenoid saponin - as an active antimicrobial ingredient in deodorant stick products. This research aimed to extract, identify and characterize bioactive compounds from seeds and leaves of Momordica charantia and evaluate their antimicrobial activity against Staphylococcus hominis, a skin-resident bacterium that contributes to body odor. Extraction was performed via maceration by using ethanol as a solvent for extraction, and the presence of triterpenoid saponins was confirmed through qualitative phytochemical analysis that Liebermann-Burchard, and saponins test and FTIR-ATR spectral analysis. A broad band at 3362.31 cm⁻¹ indicates O–H stretching, typical of saponin glycone and phenolic groups. The C–H stretching at 2926.37 cm⁻¹ reflects aliphatic –CH/CH₂ groups, consistent with triterpenoid backbones. A peak at 1641.8 cm⁻¹ suggests C=C or conjugated C=O, characteristic of aglycone structures. Bending vibrations at 1455.01 and 1377.97 cm⁻¹ indicate CH₂ and CH₃ groups, while peaks at 1079.37 and 1037.77 cm⁻¹ correspond to C–O bonds, associated with esters, ethers, or alcohols. A minor peak at 689.21 cm⁻¹ suggests aromatic C–H bending, possibly from co-extracted phenolic compounds. These findings align with previous studies, supporting the identification and bioactive potential of momordicine II. The identification of active constituents was effectively accomplished. However, antimicrobial assessment of the crude ethanolic extracts against Staphylococcus hominis using the agar well diffusion assay did not yield measurable zones of inhibition under the tested conditions. This lack of observed activity suggests potential challenges requiring furthe
The 'Ulama' of Iran in the 19th century hagiographical literature
No full textThis study is concerned with the biographies of the Shi'i 'ulama'in Iran during the 19th century, who played a major role in the emergence of the Shi'i hierocracy as religious executors of state affairs. Chapter I: provides an overview of the relations between state and 'Ulamd' in the Safavid period and traces the development of usuli doctrine as the dominant school of ShT'i fiqh (jurisprudence). Chapters II, III and IV: focus on the lives and works of three groups of the mujtahids divided according to their generation. The first generation comprises the students of Bihbihani, who were concerned primarly with the consolidation of the Usuli school. The second generation was responsible for the formulation of the concept of wildyat al-faqih. Finally the third generation emphasised the concept of the role of the marja' al taqlid, thus paving the way for the mujtahids to intervene in affairs of state
Analisa Nilai Hinge Moment Coefficient Pada Pengaruh Bentuk Rudder Pesawat N-2XX Dengan Variasi Defleksi Rudder 0°,10°, dan 25° Berbasis Computational Fluid Dynamics
No full textPesawat N-2XX adalah pesawat yang dirancang oleh PT. Dirgantara Indonesia untuk penerbangan rute perintis dan dibuat dengan teknologi full mechanical dalam melakukan penerbangannya. Pengendalian rudder yang dilakukan oleh pilot tersebut akan menghasilkan sebuah gaya ¬counter yang disebut dengan coefficient hinge moment. Nilai coefficient hinge moment dari rudder tergantung dari bentuk rudder yang dimiliki pesawat, sehingga dilakukan analisa mengenai variasi nilai hinge moment terhadap bentuk rudder yang berbeda. Penggunaan rudder dengan bentuk conic dengan defleksi 0° dan 10° memiliki nilai coefficient hinge moment yang lebih kecil dibanding rudder circle. Namun pada sudut defleksi 25° rudder conic memiliki nilai Ch sebesar 0.051166 pada angle of attack -5°, lalu sebesar 0.060217 pada angle of attack 0°, dan sebesar 0.069274 untuk angle of attack 5°.
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Indonesian Aerospace Company ( PT. Dirgantara Indonesia) is developing new generation of aircraft, prototype N-2XX to solve the problem of transportation between islands. N-2XX aircraft use full mechanical technology for flying, thus the pilot will control the aircraft without electronic steering assist. Rudder is used to make the aircraft perform yawing, then the pilot just steering the rudder to do so. Controlling the rudder will results a counter measure. The counter measure is called hinge moment coefficient. The value of hinge moment coefficient depends on the shape of the rudder, thus analysist of hinge moment in different shape of rudder should be conducted. The use of conic shaped rudder in 0° and 10° deflection angles has smaller hinge moment coefficient than circle shaped rudder. Only for 25° deflection angles conic shaped rudder has more Ch which is 0.051166 for angle of attack -5°, then 0.060217 for angle of attack 0°, and 0.069274 for angle of attack 5°
Performance Evaluation of Hollow Fiber Membrane Contactors for Dispersion-Free Extraction of Cu2+ through Modelling and Simulation
No full textIn this work extraction of copper (II) (Cu2+) from aqueous solution has been studied theoretically in commercially available hollow fiber membrane contactors (HFMCs) X-40 and X-50 modules from Liqui CelTM. Trifluoro-acetylacetone (TFA) has been used as extractant. A mathematical model based on resistance-in-series has been presented to investigate the mass transfer mechanism and distribution of Cu2+ at interface. Model simulation was performed for various hydrodynamics and membrane geometrical characteristics in order to determine the solute efficiency, transmembrane flux and height of transfer unit (HTU) for both modules. In case of X-40 module, extraction efficiency reached to 78 % when the feed flowrate was 1.67 m3s-1 while that for X-50, it was found to be just 20 % under same hydrodynamic conditions. On the basis of model results it was inferred that HFMCs could be the appropriate devices for extraction owing to exceptional low HTU value
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