Search Results - (Author, Cooperation:H. Ahmed)
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1Latest Papers from Table of Contents or Articles in PressAfaq, A., Alahmed, S., Chen, S.-h., Lengana, T., Haroon, A., Payne, H., Ahmed, H., Punwani, S., Sathekge, M., Bomanji, J.
The Society of Nuclear Medicine (SNM)
Published 2018Staff ViewPublication Date: 2018-01-03Publisher: The Society of Nuclear Medicine (SNM)Print ISSN: 0022-3123Topics: MedicinePublished by: -
2SSOARStaff View
Publication Date: 2023-10-11Description: This study examines and analyses the implementation of musyarakah, mudharabah and murabahah financing and the obstacles in implementing such financing at Bank Muamalat Indonesia Mataram Branch. The type of research used is normative empirical using statutory, sociological and conceptual approach methods. Types and sources of data are carried out using primary and secondary legal materials and field data. Based on the research results, it is known that implementing musyarakah, mudharabah and murabahah financing at Bank Muamalat Indonesia Mataram Branch from the perspective of Islamic law has yet to be appropriate in several aspects. The obstacles in funding come from two factors, namely external and internal.Keywords: Wirtschaft ; Economics ; Financing; Obstacles; Bank Muamalat ; Wirtschaftssektoren ; Wirtschaftspolitik ; Economic Sectors ; Economic Policy ; Finanzierung ; Bankgewerbe ; Indonesien ; funding ; banking ; IndonesiaType: Zeitschriftenartikel, journal article -
3Latest Papers from Table of Contents or Articles in PressDAgostino, E. M., Patel, H. H., Ahmed, Z., Hansen, E., Mathew, M. S., Nardi, M. I., Messiah, S. E.
BMJ Publishing Group
Published 2018Staff ViewPublication Date: 2018-06-13Publisher: BMJ Publishing GroupPrint ISSN: 0143-005XElectronic ISSN: 1470-2738Topics: MedicinePublished by: -
4Latest Papers from Table of Contents or Articles in PressKing, C., Boyd, N., Walker, I., Zadutsa, B., Baqui, A. H., Ahmed, S., Islam, M., Kainja, E., Nambiar, B., Wilson, I., McCollum, E. D., Fernandez, Makwenda, Phiri, Colbourn, Bernstein, Begum, Roy, Abdullah, Hanif
BMJ Publishing
Published 2018Staff ViewPublication Date: 2018-01-31Publisher: BMJ PublishingElectronic ISSN: 2044-6055Topics: MedicineKeywords: Open access, Global healthPublished by: -
5Latest Papers from Table of Contents or Articles in PressJan Jeske, Ángel Rivas, Muhammad H Ahmed, Miguel A Martin-Delgado and Jared H Cole
Institute of Physics (IOP)
Published 2018Staff ViewPublication Date: 2018-09-19Publisher: Institute of Physics (IOP)Electronic ISSN: 1367-2630Topics: PhysicsPublished by: -
6Latest Papers from Table of Contents or Articles in PressJamal A Abbas, Ibtisam A Said, Manaf A Mohamed, Suhad A Yasin, Zeravan A Ali and Idrees H Ahmed
Institute of Physics (IOP)
Published 2018Staff ViewPublication Date: 2018-12-13Publisher: Institute of Physics (IOP)Print ISSN: 1757-8981Electronic ISSN: 1757-899XTopics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision MechanicsPublished by: -
7Latest Papers from Table of Contents or Articles in PressStaff View
Publication Date: 2018-10-20Publisher: Institute of Physics (IOP)Print ISSN: 1757-8981Electronic ISSN: 1757-899XTopics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision MechanicsPublished by: -
8Latest Papers from Table of Contents or Articles in PressM. Rolland ; P. T. Edlefsen ; B. B. Larsen ; S. Tovanabutra ; E. Sanders-Buell ; T. Hertz ; A. C. deCamp ; C. Carrico ; S. Menis ; C. A. Magaret ; H. Ahmed ; M. Juraska ; L. Chen ; P. Konopa ; S. Nariya ; J. N. Stoddard ; K. Wong ; H. Zhao ; W. Deng ; B. S. Maust ; M. Bose ; S. Howell ; A. Bates ; M. Lazzaro ; A. O'Sullivan ; E. Lei ; A. Bradfield ; G. Ibitamuno ; V. Assawadarachai ; R. J. O'Connell ; M. S. deSouza ; S. Nitayaphan ; S. Rerks-Ngarm ; M. L. Robb ; J. S. McLellan ; I. Georgiev ; P. D. Kwong ; J. M. Carlson ; N. L. Michael ; W. R. Schief ; P. B. Gilbert ; J. I. Mullins ; J. H. Kim
Nature Publishing Group (NPG)
Published 2012Staff ViewPublication Date: 2012-09-11Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: AIDS Vaccines/adverse effects/*immunology ; Genetic Predisposition to Disease ; HIV Antibodies/immunology ; HIV Infections/immunology/*prevention & control/*virology ; HIV-1/*genetics/*immunology ; Humans ; Molecular Sequence Data ; Phylogeny ; Randomized Controlled Trials as Topic ; Sequence Analysis, DNA ; env Gene Products, Human Immunodeficiency Virus/*genetics/*immunologyPublished by: -
9Latest Papers from Table of Contents or Articles in PressHanbyeol Jo, Ahmed H. E. Hassan, Seung Young Jung, Jae Kyun Lee, Yong Seo Cho and Sun-Joon Min
American Chemical Society (ACS)
Published 2018Staff ViewPublication Date: 2018-01-31Publisher: American Chemical Society (ACS)Print ISSN: 1523-7060Electronic ISSN: 1523-7052Topics: Chemistry and PharmacologyPublished by: -
10Latest Papers from Table of Contents or Articles in PressHebah A. Kutbi; Hala H. Mosli; Ahmed H. Alhasan; Rana H. Mosli
Nature Publishing Group (NPG)
Published 2018Staff ViewPublication Date: 2018-09-08Publisher: Nature Publishing Group (NPG)Electronic ISSN: 2044-4052Topics: MedicinePublished by: -
11Latest Papers from Table of Contents or Articles in PressAhmed H. Dorrah, Carmelo Rosales-Guzmán, Andrew Forbes, and Mo Mojahedi
American Physical Society (APS)
Published 2018Staff ViewPublication Date: 2018-10-25Publisher: American Physical Society (APS)Print ISSN: 1050-2947Electronic ISSN: 1094-1622Topics: PhysicsKeywords: Quantum optics, physics of lasers, nonlinear optics, classical opticsPublished by: -
12Articles: DFG German National LicensesEngland, J. M. C. ; Timans, P. J. ; Hill, C. ; Augustus, P. D. ; Ahmed, H.
[S.l.] : American Institute of Physics (AIP)
Published 1993Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: Time-resolved reflectivity measurements have been used to investigate the morphology of an evolving amorphous-crystalline interface during solid phase epitaxial regrowth of an ion-implanted polycrystalline silicon film. Isothermal electron beam heating was used to produce partly regrown specimens for cross-sectional transmission electron microscopy analysis, and this has enabled a direct correlation to be established between the interface shape and the observed reflectivity transients. Using a thin-film optical model of an evolving rough interface, this correlation has enabled interface shapes to be inferred from the reflectivity at higher temperatures, where it is difficult to achieve partial regrowth. For undoped material, smaller grain sizes have been found to lead to rougher interfaces, with regrowth rates typically 20 times slower than for single crystal. At 620 °C, the presence of high concentrations of arsenic results in a smoother interface, but as the regrowth temperature is increased, the interface becomes rougher. The complex interplay between doping, temperature, and initial microstructure is investigated at temperatures up to 850 °C.Type of Medium: Electronic ResourceURL: -
13Articles: DFG German National LicensesEngland, J. M. C. ; Zissis, N. ; Timans, P. J. ; Ahmed, H.
[S.l.] : American Institute of Physics (AIP)
Published 1991Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: Experiments have been carried out to determine the temperature distributions induced during swept-line electron-beam heating of silicon. In situ measurements of the reflectivity were used to determine the temperature rise, using as a basis the rise in reflectivity exhibited by silicon with increasing temperature. Sweep speeds between 10 and 60 cm/s were studied using line beams between 60 and 300 μm wide. The experimental results were compared with analytic one- and two-dimensional models assuming constant thermal properties, and with a one-dimensional (1D) numerical model which takes into account the variation of heat capacity and thermal conductivity with temperature. The analytic models were used to show the range of conditions over which the 1D approximation could be applied and to quantify the errors introduced as this approximation breaks down. The experimentally measured peak temperatures and those predicted by the numerical model were found to agree to within 5% for conditions where the heat flow was in the 1D regime. For other conditions, the experimental and numerical results were found to differ, but the size of this discrepancy was consistent with the errors introduced by making the 1D approximation in the numerical model.Type of Medium: Electronic ResourceURL: -
14Articles: DFG German National LicensesHornsey, R. I. ; Thornton, T. J. ; Cleaver, J. R. A. ; Ahmed, H.
[S.l.] : American Institute of Physics (AIP)
Published 1993Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: Channeled ions offer a means of patterning a wafer with a two-dimensional electron gas (2DEG) buried deep below the surface. The implantation of 60–140 keV Si++ ions into a 580-nm-deep 2DEG formed at a GaAs/AlGaAs heterojunction has been characterized, with respect to ion energy, dose, and angle of incidence. Transverse electron focusing measurements have been used to investigate the roughness of the implanted boundary, leading to measured values for the specularity coefficient of about 0.5 at 1.7 and 4.2 K. Similar measurements at lower temperatures (120 mK) have shown fine structure in the magnetoresistance, in addition to the classical transverse electron focusing effect. The fine structure is attributed to electron interference effects at, or close to, the boundary. Channeled ion implantation has been used to define an in-plane-gated transistor which, at 300 mK, shows clear evidence of ballistic electron transport.Type of Medium: Electronic ResourceURL: -
15Articles: DFG German National LicensesWilkinson, R. J. ; Ager, C. D. ; Duffield, T. ; Hughes, H. P. ; Hasko, D. G. ; Ahmed, H. ; Frost, J. E. F. ; Peacock, D. C. ; Ritchie, D. A. ; Jones, G. A. C. ; Whitehouse, C. R. ; Apsley, N.
[S.l.] : American Institute of Physics (AIP)
Published 1992Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: We report far infrared (FIR) studies of plasmons in spatially modulated two-dimensional electron gases (2DEGs) in AlGaAs/GaAs heterostructures using biased overlaid metal gratings, including interdigitated gratings, both as optical couplers and as spatially modulating gates. Comparison of the experimental results with the predictions of scattering matrix calculations of the FIR response of a modulated 2DEG in the presence of a perfectly conducting lamellar grating allow us to deduce the spatial variation of the number density distribution in the 2DEG as a function of grating bias. For the interdigitated grating gates, the 2DEG can be modulated at a period of twice that of the grating fingers by differentially biasing alternate fingers; 2D plasmon resonances have been observed at half-integral values of the grating wave vector G, corresponding to the electrically induced periodicity of the 2DEG modulation itself acting as an optical coupler in addition to the metal grating. The observed G/2 plasmon frequencies decrease with increasing amplitude of the 2DEG number density modulation, in quantitative agreement with those obtained from scattering matrix calculations of the optical response of a modulated 2DEG under a perfectly conducting lamellar grating; calculations of the oscillating charge density profiles show that this occurs because, as the modulation amplitude increases, the oscillation becomes localized in regions of low 2DEG number density which are also under one of the sets of grating fingers, and is therefore better screened.Type of Medium: Electronic ResourceURL: -
16Articles: DFG German National LicensesKhundkar, Lutfur R. ; Zewail, Ahmed H.
College Park, Md. : American Institute of Physics (AIP)
Published 1990Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: Picosecond photofragment spectroscopy of the ultraviolet (UV) photodissociation of 1,2-diiodotetrafluoroethane reveals consecutive breaking of the two C–I bonds. Spin–orbit excited (I*) atoms show a prompt rise, in agreement with a direct mode dissociation of the first bond. Ground-state (I) atoms show a biexponential buildup, one component being fast (≤1 ps) while the other component is slow (30–150 ps depending on total energy), characteristic of the second bond breaking. The transient behavior of I atoms changes with the available energy. These results are interpreted in terms of a two step model involving a weakly bound radical. Simulations of transient behavior of I atoms, based on estimated internal energy distributions from the primary step and a model for dissociation rates as a function of energy, suggest that surface crossings are relevant to the dynamics and that the quantum yield of I atoms varies with excitation energy.Type of Medium: Electronic ResourceURL: -
17Articles: DFG German National LicensesRose, Todd S. ; Rosker, Mark J. ; Zewail, Ahmed H.
College Park, Md. : American Institute of Physics (AIP)
Published 1989Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: The photodissociation dynamics of some alkali halides are explored via the method of femtosecond transition-state spectroscopy (FTS). The alkali halide dissociation reaction is influenced by the interaction between the covalent and the ground state ionic potential energy surfaces (PES), which cross at a certain internuclear separation. Depending upon the adiabaticity of the PES, the dissociating fragments may be trapped in a well formed by the avoided crossing of these surfaces. Here, we detail the FTS results of this class of reactions, with particular focus on the reaction of sodium iodide: NaI*→[Na---I]°* →Na+I. As in our first report [T. S. Rose, M. J. Rosker, and A. H. Zewail, J. Chem. Phys. 88, 6672 (1988)], we observe the dynamical motion of the wave packet along the reaction coordinate and the crossing between the covalent and ionic surfaces. The studies presented here characterize the effects of various experimental parameters, including pump and probe wavelengths, on the dynamics of the dissociation and its detection. Comparisons of the results with classical and quantum mechanical calculations are also presented.Type of Medium: Electronic ResourceURL: -
18Articles: DFG German National LicensesDantus, Marcos ; Rosker, Mark J. ; Zewail, Ahmed H.
College Park, Md. : American Institute of Physics (AIP)
Published 1988Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: Experimental results obtained for the dissociation reaction ICN*→[I⋅⋅⋅CN]Type of Medium: Electronic ResourceURL: -
19Articles: DFG German National LicensesBernstein, Richard B. ; Zewail, Ahmed H.
College Park, Md. : American Institute of Physics (AIP)
Published 1989Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: Femtosecond transition-state spectroscopy (FTS) of elementary reactions [M. Dantus, M. J. Rosker, and A. H. Zewail, J. Chem. Phys. 87, 2395 (1987)] provides real-time observations of photofragments in the process of formation. A classical mechanical description of the time-dependent absorption of fragments during photodissociation [R. Bersohn and A. H. Zewail, Ber. Bunsenges. Phys. Chem. 92, 373 (1988)] forms the basis for the present scheme for relating observations to the potential energy surface. A direct inversion scheme is presented that allows the difference in the two relevant excited-state potential curves to be deduced from observed transients at different probe wavelength tunings. In addition, from the shape and dependence of the transients on pump wavelength, information on the lower of the two potential curves (i.e., that of the dissociating molecule) is obtained. The methodology is applied to the experimental FTS data (Dantus et al.) on the CN photofragment from the ICN photodissociation.Type of Medium: Electronic ResourceURL: -
20Articles: DFG German National LicensesSemmes, David H. ; Baskin, J. Spencer ; Zewail, Ahmed H.
College Park, Md. : American Institute of Physics (AIP)
Published 1990Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: The vibrational predissociation of several van der Waals complexes of t-stilbene has been studied by directly measuring, in real time, the fluorescence intensity from the initial reactant state and from the individual product states formed in the dissociation process after exciting single vibrational levels of the complex. With the aid of a kinetic model involving sequential processes, the individual rates for intramolecular vibrational redistribution and vibrational predissociation in the overall dissociation process are resolved and distinguished in several cases. In the stilbene–He complex, the dissociation is significantly faster from low energy out-of-plane modes than it is from a higher energy in-plane mode.Type of Medium: Electronic ResourceURL: