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| 1 | Generating optical orbital angular momentum at visible wavelengths using a plasmonic metasurface显示文摘Light beams with a helical phase-front possess orbital angular momentum along their direction of propagation in addition to the spin angular momentum that describes their polarisation.Until recently,it was thought that these two‘rotational’motions of light were largely independent and could not be coupled during light–matter interactions.However,it is now known that interactions with carefully designed complex media can result in spin-to-orbit coupling,where a change of the spin angular momentum will modify the orbital angular momentum and vice versa.In this work,we propose and demonstrate that the birefringence of plasmonic nanostructures can be wielded to transform circularly polarised light into light carrying orbital angular momentum.A device operating at visible wavelengths is designed from a space-variant array of subwavelength plasmonic nano-antennas.Experiment confirms that circularly polarised light transmitted through the device is imbued with orbital angular momentum of 62'(with conversion efficiency of at least 1%).This technology paves the way towards ultrathin orbital angular momentum generators that could be integrated into applications for spectroscopy,nanoscale sensing and classical or quantum communications using integrated photonic devices. | Ebrahim Karimi Sebastian A Schulz Israel De Leon Hammam Qassim Jeremy Upham Robert W Boyd | 2014 | Light(Science & Applications)2014，3，1： | 39 |
| 2 | Effectiveness of MRA on embolized intracranial aneurysms: a comparison of DSA, CE-MRA, and TOF-MRA显示文摘Purpose: The endovascular treatment of intracranial aneurysms was proven safe and effective compared to the alternative method of surgical clipping, despite the high recurrence rate. Follow-up of embolized intracranial aneurysms is mandatory for the early detection of recurrence and improved outcomes. DSA is used as the reference standard for this assessment. To determine the effectiveness of MRA in follow-up evaluations of intracranial aneurysms after embolization by comparing DSA, CE-MRA, and TOF-MRA. Materials and Methods: Sixty-eight consecutive patients undergoing DSA, TOF-MRA, and CE-MRA during an interval of <1 week were enrolled in this 6-month study. Images were evaluated for occlusion status, patency of the parent vessels, and artifacts. The modified Raymond-Roy occlusion classification and Aneurysm Embolization Grades were used to assess the occlusion status and initial DSA images for detection of recurrence in two filtered study phases with optimized selection criteria. Seventeen observers(phase I: 9, phase II: 8) independently interpreted the double-blinded images. Agreement was expressed with a Fleiss kappa value; p < 0.05 was considered significant. Results: This study included 68 patients with 77 aneurysms; 38(49.35%) were treated with coil alone and 39(50.65%) with stent-assisted coiling. In both phases, DSA was superior to TOF-MRA and CE-MRA using MRRC(Phase I: k = 0.567, p ≤ 0.001; k = 0.287, p ≤ 0.001; k = 0.117, p ≤ 0.001, respectively; Phase II: k = 0.503, p ≤ 0.001; k = 0.303, p ≤ 0.001; k = 0.115, p = 0.038, respectively). TOF-MRA was as effective as DSA(TOF: k = 0.335, p ≤ 0.001; DSA: k = 0.323, p ≤ 0.001) for recurrence detection. Conclusion: We suggest TOF-MRA as a first-line follow-up tool to detect aneurysm recurrence, and DSA to quantify the filling space to make a definite decision on re-embolization. | Ally Mohamed Qassim Sheng Guan Halfan Saidi Ngowo Binghui Liu Haowen Xu | 2018 | Journal of Interventional Medicine2018，1，1： | 4 |
| 3 | Outcome of nucleoplasty in patients with radicular pain due to lumbar intervertebral disc herniation显示文摘 | Sunny Ogbonnaya Chandrasekaran Kaliaperumal Abdulla Qassim Michael O′Sullivan | 2013 | Journal of Natural Science Biology and Medicine2013，，1： | 2 |
| 4 | A survey of intrusion detection andprevention systems显示文摘 | Patel A Qassim Q Wills C | 2010 | Information Management and ComputerSecurity2010，18，4： | 1 |
| 5 | Synthesis of utility systems by simulated显示文摘 | Maia L O A Vidal L A Qassim R Y | 1995 | Comp & Chem Eng1995，19，： | 1 |
| 6 | A novel extractionless HPLC fluorescence method for the determination of glyburide in the human plasma: application to a bioequivalence study显示文摘 | Sami Qassim Omar Abed | 2001 | J Pharm Pharmaceut Sci2001，42，： | 1 |
| 7 | Synthesis of utility systems with variable demands using simulated annealing显示文摘 | Maia L O A Vidal L A Qassim R Y | 1997 | Comp & Chem Eng1997，21，： | 1 |
| 8 | Prioritization of failure risk in subsea flexible pipes via data envelopment analysis显示文摘 | Netto T A Honorato H J Qassim R Y | 2013 | Marine Structures2013，34，： | 1 |
| 9 | A model for the application of Data Envelopment Analysis(DEA) in Activity-based Management (ABM) 显示文摘 | Moto Benzecry Qassim | 1999 | International Journal of Technology Management1999，17，78： | 1 |
| 10 | outcome of nucleoplasty in patients with radicular pain due to lumbar intervertebral disc herniation显示文摘 | OGBONNAYA S KALIAPERUMAL C QASSIM A | 2013 | J nat sci biol med2013，4，1： | 1 |
| 11 | Postharvest deficit irrigation in ' Tatura 204 ' peach: Subsequent productivity and water saving显示文摘 | Abdi Qassim fan Goodwina Rebecca Bruce | 2013 | Agricultural Water Management2013，117，： | 1 |
| 12 | Outcome of nucleo- plasty in patients with radicular pain due to lumbar intervertebral disc herniation显示文摘 | Ogbonnaya C Kaliaperumal C Qassim A | 2013 | J Nat Sci Biol Med2013，1，4： | 1 |
| 13 | A model for the application of Data Envelopment Analysis(DEA) in Activity-based Management (ABM) 显示文摘 | Moto Benzecry Qassim | 1999 | International Journal of Technology Management1999，17，78： | 1 |
| 14 | A novel extractionless HPLC fluorescence method for the determination of glyburide in the human plasma: application to a bioequivalence study 显示文摘 | Qassim S Abed O Abraham B Al-Lami A Masood S | 2001 | J Pharm Pharmaceut Sci2001，4，2： | 1 |
| 15 | A novel extractionless HPLC fluorescence method for the determination of glyburide in the human plasma:application to a bioequivalence study显示文摘 | Khatri J Qassim S Abed O | 2001 | J Pharm Pharm Sci2001，4，2： | 1 |
| 16 | Shielding electronics behind com posite structures 显示文摘 | Qassim K S Spieth B D | 1996 | Nuclear Science1996，45，02： | 1 |
| 17 | Outcome ofnucleoplasty in patients with radicular pain due to lumbar intervertebral disc hemiation显示文摘 | Ogbonnaya S Kaliaperumal C Qassim A | 2013 | Joumal ofnaturalscience biology and medicine2013，4，1： | 1 |
| 18 | A novel extractioless HPLC fluorescence method for the determination of glyburide in the human plasma: application to a bioequivalence study显示文摘 | Qassim S Abed O | 2001 | J Pharm Pharm Sci2001，4，2： | 1 |
| 19 | Project acceleration via activity crashing, overlapping, and substitution 显示文摘 | Gerk J E V Qassim R Y | 2008 | IEEE Transactions on Engineering Management2008，55，4： | 1 |
| 20 | A novel extractioless HPLC fluorescence method for the determination of glyburide in the human plasma: application to a bioequivalence study 显示文摘 | Khatri J Qassim S Abed O | 2001 | J Pharm Sci2001，4，2： | 1 |
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