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  • 1
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    Magnetic phases of spin-1 spin–orbit-coupled Bose gases (2016)
    Springer Nature
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    Publication Date: 2016-04-01
    Description: Article Phases of matter are characterized by order parameters describing the type and degree of order in a system. Here, the authors explore the magnetic phases and the phase transitions present in a near-zero temperature spin-1 spin-orbit-coupled Bose gas, observing ferromagnetic and unpolarized states. Nature Communications doi: 10.1038/ncomms10897 Authors: D. L. Campbell, R. M. Price, A. Putra, A. Valdés-Curiel, D. Trypogeorgos, I. B. Spielman
    Electronic ISSN: 2041-1723
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General , Physics
    Published by Springer Nature
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  • 2
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    Analysis of Parameters Assessment on Laminated Rubber-Metal Spring for Structural Vibration (2016)
    Institute of Physics (IOP)
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    Publication Date: 2016-03-03
    Description: This paper presents the analysis of parameter assessment on laminated rubber-metal spring (LR-MS) for vibrating structure. Three parameters were selected for the assessment which are mass, Young's modulus and radius. Natural rubber materials has been used to develop the LR-MS model. Three analyses were later conducted based on the selected parameters to the LR-MS performance which are natural frequency, location of the internal resonance frequency and transmissibility of internal resonance. Results of the analysis performed were plotted in frequency domain function graph. Transmissibility of laminated rubber-metal spring (LR-MS) is changed by changing the value of the parameter. This occurrence was referred to the theory from open literature then final conclusion has been make which are these parameters have a potential to give an effects and trends for LR-MS transmissibility.
    Print ISSN: 1757-8981
    Electronic ISSN: 1757-899X
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Institute of Physics (IOP)
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  • 3
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    Solubility dynamic of methyl yellow and carbon black in microemulsions and lamellar liquid crystal of water, non ionic surfactants and cyclohexane system (2016)
    Institute of Physics (IOP)
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    Publication Date: 2016-02-06
    Description: Solubility dynamics of methyl yellow and carbon black in microemulsions and liquid crystals of water, non-ionic surfactants and cyclohexane system, have been investigated. Actually, solubility dynamics of these dyes both in microemulsion (w/o microemulsions) and the lamellar liquid crystal (LLC) were strongly related to the chemical composition, nature and characteristics of microemulsions and the lamellar liquid crystals.
    Print ISSN: 1757-8981
    Electronic ISSN: 1757-899X
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Institute of Physics (IOP)
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  • 4
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    Quenched binary Bose-Einstein condensates: Spin-domain formation and coarsening (2014)
    American Physical Society (APS)
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    Publication Date: 2014-03-26
    Description: Author(s): S. De, D. L. Campbell, R. M. Price, A. Putra, Brandon M. Anderson, and I. B. Spielman We explore the time evolution of two-component Bose-Einstein condensates (BECs), quasi one dimensional with respect to their spinor dynamics, following a quench from one component BECs with a U(1) order parameter into two-component condensates with a U(1)×Z2 order parameter. In our case, these two s... [Phys. Rev. A 89, 033631] Published Tue Mar 25, 2014
    Keywords: Matter waves and collective properties of cold atoms and molecules
    Print ISSN: 1050-2947
    Electronic ISSN: 1094-1622
    Topics: Physics
    Published by American Physical Society (APS)
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  • 5
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    The Effect of Perforation on the Dynamics of a Flexible Panel (2014)
    Hindawi
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    Publication Date: 2014-09-18
    Description: Introduction of holes into plate-like structures is commonly found as one of the practical noise control measures to reduce sound radiation. However, perforation also reduces the panel stiffness and hence increases its vibration. The discussion on this effect is lacking and hence this paper discusses the dynamics of a perforated panel from the results obtained from Finite Element (FE) model. Different hole geometries and arrangement are simulated to investigate their effect on the plate mobility. In general, it is found that increasing the perforation ratio increases the plate mobility. For a fixed perforation ratio, the mobility increases at high frequency (above 1 kHz) for a smaller hole density in the plate. The plate with holes concentrated at the middle shows the largest increase of vibration around the plate centre compared to those uniformly distributed or away from the middle and concentrated at the plate edges. This is because as the hole separation becomes smaller, the reduction of the global stiffness around the mid area of the plate becomes greater. This also corresponds to the finding here that the mobility is greater at the vicinity of the hole. Different conditions of the plate edges are found to give consistent trend of the effect of perforation.
    Print ISSN: 1687-6261
    Electronic ISSN: 1687-627X
    Topics: Physics
    Published by Hindawi
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  • 6
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    Normal Incidence of Sound Transmission Loss of a Double-Leaf Partition Inserted with a Microperforated Panel (2013)
    Hindawi
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    Publication Date: 2013-09-05
    Description: A double-leaf partition in engineering structures has been widely applied for its advantages, that is, in terms of its mechanical strength as well as its lightweight property. In noise control, the double-leaf also serves as an effective noise barrier. Unfortunately at low frequency, the sound transmission loss reduces significantly due to the coupling between the panels and the air between them. This paper studies the effect of a microperforated panel (MPP) inserted inside a double-leaf partition on the sound transmission loss performance of the system. The MPP insertion is proposed to provide a hygienic double-leaf noise insulator replacing the classical abrasive porous materials between the panels. It is found that the transmission loss improves at the troublesome mass-air-mass resonant frequency if the MPP is located closer to the solid panel. The mathematical model is derived for normal incidence of acoustic loading.
    Print ISSN: 1687-6261
    Electronic ISSN: 1687-627X
    Topics: Physics
    Published by Hindawi
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  • 7
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    Normal Incidence of Sound Transmission Loss from Perforated Plates with Micro and Macro Size Holes (2014)
    Hindawi
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    Publication Date: 2014-04-18
    Description: This paper studies the sound transmission loss of perforated panels and investigates the effect of the hole diameter on the sound insulation performance under normal incidence of acoustic loading. The hole diameters are distinguished into micro (submillimeter) and macro (millimeter) sizes. In general, the transmission loss reduces as the perforation ratio is increased. However, by retaining the perforation ratio, it is found that the transmission loss increases as the hole diameter is reduced for a perforate with micro holes due to the effect of resistive part in the hole impedance, which is contrary to the results for those with the macro holes. Both show similar trend at high frequency where the fluid behavior inside the hole is inertial. Simple analytical formulae for engineering purpose are provided. Validation of the models with measurement data also gives good agreement.
    Print ISSN: 1687-6261
    Electronic ISSN: 1687-627X
    Topics: Physics
    Published by Hindawi
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  • 8
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    The Effect of Concentration Staging on Performance of Produced Water treatment using Forward Osmosis (2018)
    Institute of Physics (IOP)
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    Publication Date: 2018-11-10
    Description: During oil and gas production, a large amount of produced water (PW) is generated, which would be harmful to the environment if not treated properly. Treatment of such wastewater requires multi-processing units and typically includes fouling prone pressure driven membranes. Forward osmosis (FO) seems promising due to its high salt rejection, high total dissolved solid removal, more reversible fouling type, does not require external pressure to operate and potentially can be used as a standalone unit with minimum pretreatment. However, FO still suffers from low permeate flux, high reverse solute flux (RSF) and membrane fouling, although not as severe as in pressure driven membrane. Since FO depends largely on osmotic pressure difference, the effect of concentration staging was investigated. It was found that multi-stage concentration was able to achieve up to 80% water recovery due to sufficient osmotic pressure.
    Print ISSN: 1757-8981
    Electronic ISSN: 1757-899X
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Institute of Physics (IOP)
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  • 9
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    Effect of Solvent Vapor Treatment on Electrospun Nylon 6,6 Nanofiber Membrane (2018)
    Institute of Physics (IOP)
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    Publication Date: 2018-11-10
    Description: This paper highlights the effect of solvent vapor treatment on characterization of electrospun nanofiber membrane (ENM). Fouling issue in membrane separation has becoming a debate since it reduces the lifetime of the membrane. In order to solve this issue, ENM has been recommended due to its great performance in terms of filtration, permeability and stability. However, ENM has several drawbacks such as low mechanical strength and loosely packed layers of nanofibers. Thus, solvent vapor treatment was used to solve this issue. In this study, nylon 6, 6 was fabricated as ENM and was exposed to formic acid as solvent vapor treatment. Solvent vapor treatment helps to increase the bonding of fiber by promoting crosslinking at the junction of fiber thus making the membrane mechanically durable. By controlling the solvent vapor exposure time, excessive fusion between the fibers can be prevented as over-crosslinking would reduce membrane permeability. Solvent vapor treatment also reduces...
    Print ISSN: 1757-8981
    Electronic ISSN: 1757-899X
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Institute of Physics (IOP)
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  • 10
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    Endovascular laser ablation: minimally invasive intervention for klippel trenaunay syndrome (2018)
    Institute of Physics (IOP)
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    Publication Date: 2018-12-05
    Description: Klippel Trenaunay syndrome (KTS) is a complex congenital malformation that may affect the lower or upper extremities or, less commonly, involve the trunk, head, or neck. The three main components of KTS are varicosities and venous malformations (VMs), capillary malformations (port-wine stains), and hypertrophy of the soft tissue and bone. Management of varicosities in KTS patients is generally conservative. The role of endovascular therapy and minimally invasive intervention has not been widely practiced due to the low prevalence of the disease, but is preferred over open surgery, especially when non operative management is refractory. This case report is aimed to describe our minimally invasive procedure, Endovascular laser ablation for treatment of Klippel Trenaunay Syndrome. A female, 24 years old came to hospital with chief complaint of swelling and pain on her leg. She was diagnosed with Klippel Trenaunay Syndrome and we performed Endovascular Laser Ablation to manage her v...
    Print ISSN: 1757-8981
    Electronic ISSN: 1757-899X
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Institute of Physics (IOP)
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