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Search Results: 1 - 10 of 1697 matches for " Mahmood Miah "
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Bioart: Transhuman and Posthuman Performance Bioarte: actuación transhumana y posthumana
Andy Miah
Teknokultura : Revista de Cultura Digital y Movimientos Sociales , 2012,
Abstract: For over a century, science fiction has gripped the attention of audiences world-wide, with some of its most successful achievements furnishing the world with utopian and dystopian narratives about the progress of science and the limits of humanity's ability to understand its own complexity and place in the world. However, it is only in the last 30 years that ideas of transhumanism and posthumanism have become part of the intellectual influences of various other art forms that engage with similar subject matter. It is even more recent that posthuman and transhuman scholars have interpreted the work of many pioneering artists and designers as manifestos for their ideas, or as rejections of the possible futures their ideas imply. This is not to say that transhumanist and posthumanist thought is absent from art works that precede this period, but that the explicit link between theories of post-/trans- humanism and such artwork has only recently been made. This article makes explicit the association of certain art forms and art works to trans- and posthumanist ideas, which have become constitutive of the political, cultural and philosophical differences and similarities that exist between these concepts. It discusses a range of art practices with a view to identifying themes within trans- and posthuman art, while also articulating some of the foundational contributions in this field. It begins by advancing a definition of bioart to capture the common ground between transhuman and posthuman art. It then considers interpretations of such works and rejection of their collective definition, by drawing attention to their socio-political and bioethical context. Finally, I consider how one may read bioart from the perspective of transhuman and posthuman thought. Throughout, some of the defining artists in the fields of transhuman and posthuman art are considered. Durante más de un siglo la ciencia ficción ha atraído la atención de toda la población mundial, habiendo obtenido uno de sus mayores éxitos en el hecho de proporcionarnos narrativas utópicas y distópicas sobre el progreso de la ciencia y los límites de la capacidad humana para entender su propia complejidad y su lugar en el mundo. Sin embargo, hace apenas 30 a os que las ideas de transhumanismo y posthumanismo han pasado a formar parte de las influencias intelectuales de otras formas de arte diversas que manejan temáticas similares. Pero todavía es más reciente el hecho de que académicos del transhumanismo y del posthumanismo hayan interpretado los trabajos de muchos artistas y dise adores pioneros como ma
Cu-Doping Effects in CdI2Nanocrystals: The Role of Cu-Agglomerates
Miah M
Nanoscale Research Letters , 2008,
Abstract: Cu-doping effects in CdI2nanocrystals are studied experimentally. We use the photostimulated second harmonic generation (PSSHG) as a tool to investigate the effects. It is found that the PSSHG increases with increasing Cu content up to 0.6% and then decreases due to the formation of the Cu-agglomerates. The PSSHG for the crystal with Cu content higher than 1% reduces to that for the undoped CdI2crystal. The results suggest that a crucial role of the Cu-metallic agglomerates is involved in the processes as responsible for the observed effects.
Electron-Spin Precession in Dependence of the Orientation of the External Magnetic Field
Miah M
Nanoscale Research Letters , 2009,
Abstract: Electron-spin dynamics in semiconductor-based heterostructures has been investigated in oblique magnetic fields. Spins are generated optically by a circularly polarized light, and the dynamics of spins in dependence of the orientation (θ) of the magnetic field are studied. The electron-spin precession frequency, polarization amplitude, and decay rate as a function ofθare obtained and the reasons for their dependences are discussed. From the measured data, the values of the longitudinal and transverse components of the electrong-factor are estimated and are found to be in good agreement with those obtained in earlier investigations. The possible mechanisms responsible for the observed effects are also discussed.
Photo-Induced Spin Dynamics in Semiconductor Quantum Wells
Miah M
Nanoscale Research Letters , 2009,
Abstract: We experimentally investigate the dynamics of spins in GaAs quantum wells under applied electric bias by photoluminescence (PL) measurements excited with circularly polarized light. The bias-dependent circular polarization of PL (P PL) with and without magnetic field is studied. TheP PLwithout magnetic field is found to be decayed with an enhancement of increasing the strength of the negative bias. However,P PLin a transverse magnetic field shows oscillations under an electric bias, indicating that the precession of electron spin occurs in quantum wells. The results are discussed based on the electron–hole exchange interaction in the electric field.
GENETICALLY MODIFIED ATHLETES: BIOMEDICAL ETHICS, GENE DOPING AND SPORT
Andy Miah
Journal of Sports Science and Medicine , 2004,
Abstract: The author discusses the extremely important issue of modifying athletes genetically in order to develop elite sportsmen. He sheds light on various aspects of bioethics and their implications for the practices and management of sport in general.
Portfolio as a Stimulus for Improving the Work of Teacher Educators: An Experience at a College in the Arab Sector  [PDF]
Mahmood Khalil
Creative Education (CE) , 2014, DOI: 10.4236/ce.2014.517177
Abstract: The present article examines the contribution of building a portfolio to the professional development of teacher educators, and the effectiveness of their progress within the organized framework. The results of long-time research that was carried out in a college for teachers’ education show the contribution of the derivative works that contain reflection and accompanies reflective thinking meetings for professional progress of teacher educators; for strengthening their motivation; for improving their level of education and ensuring its quality; to develop their involvement in the duty they are fulfilling and for a annual and future planning cultivation. Moral education, values and attitudes via acquiring knowledge in science content knowledge as Dreyfus (1995) emphasized that “biological knowledge is a prerequisite for the development of students’ values and attitudes”. Science knowledge role is not only for academic achievement and mastery of cognitive and metacognitive skills, but to educate students on the affective domain being active in the community life based on moral and ethical values, and positive attitudes toward societal issues, like social justice, preservation of the environment and peace, the last two being addressed due to the fact of having a mutual impact connection in one of the STS learning units presented.
Study of the transport properties of Nanocrystalline soft magnetic alloy (Fe0.9Co0.1)73.5-Cu1-Nb3-Si13.5-B9
Mohammad Julhash Miah
Journal of Engineering and Applied Sciences , 2009,
Abstract: Nanocrystalline soft magnetic materials are interesting from both the fundamental and applied viewpoints. Because of various superior mechanical, magnetic and electrical properties, in comparison with those of the crystalline state, these alloys (metallic glasses) form a class of technologically important materials. In order to study the effect of Nb on the magnetotransport properties of the nanocrystalline soft magnetic material (Fe0.9Co0.1)73.5-Cu1-Nb3-Si13.5-B9, temperature and field dependent resistivity as well as magnetoresistance have been measured using conventional four-probe technique. This alloy exhibits metallic behavior in the high temperature range due to the formation of microcrystallites around the crystallization temperature Tx since more and more conduction electrons participating in the conduction mechanism. The value of magnetoresistance is found to vary (1~15%) at different temperatures (28°C~ 240°C). The complex permeability of this magnetic alloy has been measured for both as cast and annealed samples. Permeability measurement has been taken at low frequency (1 KHz-13 MHz). The permeability is found to be in the order of 104. The real part of the complex permeability is found to increase while the imaginary part is found to decrease with annealing temperatures due to local segregations. The best response is obtained for the sample annealed at 450°C for 5 minutes only. The overall permeability of the sample has low value when annealed at 450°C for 1 hour. The frequency range where the sample can be useful as a soft magnetic material is found out as 10 KHz to 1MHz. The magnetization of the sample has been measured as a function of magnetic field at room temperature (28°C) using a vibrating sample magnetometer (VSM). Saturation magnetization for the sample is observed to be around 179emu/gm.
Salt Tolerances of Some Mainland Tree Species Select as Through Nursery Screening
Md. Abdul Quddus Miah
Pakistan Journal of Biological Sciences , 2013,
Abstract: A study of salt tolerance was carried out on germination, survival and height growth performance of important mesophytic species such as Acacia auriculiformis, Acacia hybrid, Artocarpus heterophyllus, Albizia procera, Albizia lebbeck, Acacia nilotica, Achras sapota, Casuarina equisetifolaia, Emblica officinalis, Leucaena leucocephala, Samania saman, Swetenia macrophylla, Terminalia arjuna, Tamarindus indica, Terminalia bellirica and Thespesia populnea in nursery stage using fresh water and salt (NaCl) solutions of 10, 15 and 20 ppm. Effect of salt on germination, survival performance and height growth performance were examined in this condition. Based on the observation, salt tolerance of these species has been determined Acacia auriculiformis, Acacia hybrid, Achras sapota, Casuarina equisetifolia, Leucaena leucocephala and Tamarindus indica has showed the best capacity to perform in different salinity conditions. Acacia nilotica, Emblica officinalis, Thespesia populnea has performed better. Albizia procera, Samania saman and Terminalia bellirica, germination and height performance showed good but when salinity increases survivability were decreases.
ALA-based Photodynamic Therapy of Jurkat Cells: Temperature Dependence
M. Idrish Miah
Pakistan Journal of Biological Sciences , 2002,
Abstract: A study has been performed on the temperature dependence of the light exposure of human leukemic cells when treated with the photosensitizing agent d-aminolevulinic acid, (ALA). The cells were incubated with 1mM ALA for 4h at different temperatures (31-45oC) and irradiated with different light doses in the blue spectral region (430nm). The dose-response curves were studied. Shoulders at the lower exposure regions were observed in the log-survival curves for incubation temperatures 31-37oC. The threshold dose values for the temperatures for which the shoulders had appeared were found to be 3.9, 3.2, 2.2, and 1.6min. for 31, 33, 35 and 37oC incubation temperatures, respectively. The phototoxic effect for the cells with these critical values was small. The activation energy for overcoming the shoulder reactions was 25kcal/mol. An activation energy of 9kcal/mol calculated for the cell type might be for the uptake of ALA by cells or protoporphyrin IX (PPIX) production in cells.
Comparative Study on the Performance of a Coherency-Based Simple Dynamic Equivalent with the New Inertial Aggregation
Abdul Malek Miah
International Journal of Applied Power Engineering , 2012, DOI: 10.11591/ijape.v1i3.1245
Abstract: Earlier, a simple dynamic equivalent for a power system external area containing a group of coherent generators was proposed in the literature. This equivalent is based on a new concept of decomposition of generators and a two-level generator aggregation. With the knowledge of only the passive network model of the external area and the total inertia constant of all the generators in this area, the parameters of this equivalent are determinable from a set of measurement data taken solely at a set of boundary buses which separates this area from the rest of the system. The proposed equivalent, therefore, does not require any measurement data at the external area generators. This is an important feature of this equivalent. In this paper, the results of a comparative study on the performance of this dynamic equivalent aggregation with the new inertial aggregation in terms of accuracy are presented. The three test systems that were considered in this comparative investigation are the New England 39-bus 10-generator system, the IEEE 162-bus 17-generator system and the IEEE 145-bus 50-generator system.
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