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  1. Article ; Online: Commentary on: Cerebral Embolism as a Result of Facial Filler Injections: A Literature Review.

    Rahman, Eqram

    Aesthetic surgery journal

    2021  Volume 42, Issue 3, Page(s) NP176–NP178

    MeSH term(s) Cosmetic Techniques/adverse effects ; Dermal Fillers/adverse effects ; Face ; Humans ; Injections ; Intracranial Embolism
    Chemical Substances Dermal Fillers
    Language English
    Publishing date 2021-06-10
    Publishing country England
    Document type Editorial ; Comment
    ZDB-ID 2087022-X
    ISSN 1527-330X ; 1090-820X ; 1084-0761
    ISSN (online) 1527-330X
    ISSN 1090-820X ; 1084-0761
    DOI 10.1093/asj/sjab250
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    Zs.A 5721: Show issues Location:
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  2. Article ; Online: Solar thermionic energy converters with micro-gap spacers.

    Zhang, Xin / Rahman, Ehsanur

    Optics letters

    2023  Volume 48, Issue 15, Page(s) 4173–4176

    Abstract: We present a solar thermionic energy converter (STEC) incorporating interelectrode spacer structures for solar energy harvesting. We demonstrate the impact of spacer loss on the optimal performance and gap size of STECs with and without interelectrode ... ...

    Abstract We present a solar thermionic energy converter (STEC) incorporating interelectrode spacer structures for solar energy harvesting. We demonstrate the impact of spacer loss on the optimal performance and gap size of STECs with and without interelectrode spacers. Under a solar concentration factor of 100, we show that the maximum efficiency of STECs with a spacer (5.3%) is significantly lower than that of STECs without a spacer (8.7%) at different optimal gaps due to the interelectrode spacer that conducts heat parasitically. The optimal gap ranges from a few tenths of a micron to a few microns for STECs without spacers, while the optimal gap is around 8
    Language English
    Publishing date 2023-07-28
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4794
    ISSN (online) 1539-4794
    DOI 10.1364/OL.498374
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  3. Article ; Online: Solar thermionic energy converters with micro-gap spacers: publisher's note.

    Zhang, Xin / Rahman, Ehsanur

    Optics letters

    2023  Volume 48, Issue 17, Page(s) 4549

    Abstract: This publisher's note contains corrections to Opt. Lett.48, 4173 (2023)10.1364/OL.498374. ...

    Abstract This publisher's note contains corrections to Opt. Lett.48, 4173 (2023)10.1364/OL.498374.
    Language English
    Publishing date 2023-07-15
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4794
    ISSN (online) 1539-4794
    DOI 10.1364/OL.502667
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  4. Article ; Online: Converging on a Singular Path: Revealing Contrasting Perspectives on Evidence Levels in Aesthetic Medicine and Surgery.

    Rahman, Eqram / Nahai, Foad

    Aesthetic surgery journal

    2023  Volume 44, Issue 1, Page(s) NP98–NP103

    MeSH term(s) Humans ; Surgery, Plastic ; Plastic Surgery Procedures ; Esthetics
    Language English
    Publishing date 2023-07-20
    Publishing country England
    Document type Journal Article
    ZDB-ID 2087022-X
    ISSN 1527-330X ; 1090-820X ; 1084-0761
    ISSN (online) 1527-330X
    ISSN 1090-820X ; 1084-0761
    DOI 10.1093/asj/sjad238
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  5. Article ; Online: Commentary on: Relationship Between Vertical Glabellar Lines and the Supratrochlear and Supraorbital Arteries.

    Rahman, Eqram

    Aesthetic surgery journal

    2019  Volume 40, Issue 12, Page(s) 1349–1350

    MeSH term(s) Forehead/surgery ; Humans ; Ophthalmic Artery
    Language English
    Publishing date 2019-06-05
    Publishing country England
    Document type Journal Article ; Comment
    ZDB-ID 2087022-X
    ISSN 1527-330X ; 1090-820X ; 1084-0761
    ISSN (online) 1527-330X
    ISSN 1090-820X ; 1084-0761
    DOI 10.1093/asj/sjaa193
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  6. Article ; Online: OSPE for non-surgical aesthetic training programme.

    Kumar, Narendra / Rahman, Eqram

    The clinical teacher

    2022  Volume 19, Issue 5, Page(s) e13515

    Abstract: Background: Objective structured practical examination (OSPE) has proven a reliable assessment tool in many specialities. Therefore, we aimed to construct an OSPE tool that could assess the clinical facial anatomy knowledge of non-surgical aesthetic ... ...

    Abstract Background: Objective structured practical examination (OSPE) has proven a reliable assessment tool in many specialities. Therefore, we aimed to construct an OSPE tool that could assess the clinical facial anatomy knowledge of non-surgical aesthetic practitioners in a simulated environment.
    Approach: Ten subject matter experts identified the themes individually with significant experience in teaching non-surgical aesthetic practitioners. A consensus is then reached following extensive discussion to determine the final themes. After blueprinting, 25 stations were created comprising a single best answer with a clinical vignette and either a dissected Cephalus or a high-resolution picture of a dissected Cephalus or a skull and a full-face photograph of a patient. Finally, concurrent and construct validity were assessed for individual questions. Twenty-five novices and 25 experts participated in the OSPE pilot. Each cycle lasted 45 minutes (90 seconds per station; 25 clinical and five rest stations). Internal reliability was measured by Cronbach's alpha. In addition, the novices and experts group scores were compared, employing an independent t-test.
    Evaluation: The mean item difficulty of the 25 questions was 0.65. There was a significant difference in the scores for experts (M = 48.56, SD = 1.003), novices (M = 33.60, SD = 3.18) and conditions; t (48) = 22.38, p = 0.000. These results suggest the construct validity and confirm the robustness of the OSPE set-up to accomplish the learning outcomes.
    Implication: We successfully designed and validated OSPE as an assessment tool to examine non-surgical aesthetic practitioners' clinical facial anatomy knowledge. We envisage using OSPE in our future programmes and encourage programme directors to integrate it into the postgraduate curriculum in non-surgical aesthetics.
    MeSH term(s) Clinical Competence ; Education, Medical, Undergraduate/methods ; Educational Measurement/methods ; Esthetics ; Humans ; Reproducibility of Results ; Students, Medical
    Language English
    Publishing date 2022-07-18
    Publishing country England
    Document type Journal Article
    ZDB-ID 2151518-9
    ISSN 1743-498X ; 1743-4971
    ISSN (online) 1743-498X
    ISSN 1743-4971
    DOI 10.1111/tct.13515
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    Zs.A 6678: Show issues Location:
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  7. Article ; Online: Diversity analysis of

    Cheng, Gang / Cheng, Yan / Rahman, Erkin

    PeerJ

    2023  Volume 11, Page(s) e15934

    Abstract: The bacterial diversity ... ...

    Abstract The bacterial diversity in
    MeSH term(s) Populus ; Phylogeny ; Rivers ; Bacteria/genetics ; Firmicutes ; China ; Actinobacteria ; DNA, Ribosomal ; Gammaproteobacteria
    Chemical Substances DNA, Ribosomal
    Language English
    Publishing date 2023-08-28
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2703241-3
    ISSN 2167-8359 ; 2167-8359
    ISSN (online) 2167-8359
    ISSN 2167-8359
    DOI 10.7717/peerj.15934
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  8. Article ; Online: Experimental construction of force- and frequency-response curves of nonlinear resonators.

    Elhady, Alaaeldin / Alghamdi, Majed S / Abdel-Rahman, Eihab

    Chaos (Woodbury, N.Y.)

    2023  Volume 33, Issue 6

    Abstract: We present an experimental technique to construct the response of nonlinear resonators under harmonic excitation as a control parameter is swept. Our technique can resolve nonlinear features in the resonator response, such as bifurcations and hysteresis. ...

    Abstract We present an experimental technique to construct the response of nonlinear resonators under harmonic excitation as a control parameter is swept. Our technique can resolve nonlinear features in the resonator response, such as bifurcations and hysteresis. To validate it, we construct the frequency response of a MEMS resonator while the excitation frequency is swept. The response is measured optically and recorded in the time domain. The root-mean-square of the response is calculated over a variable-size time-window. The sweep time, window size, and frequency step size were found to be limited by the quality factor of the resonator under test. We examine and describe those limitations in terms of the slew rate and sampling frequency. Although we used optical measurements to validate the technique, the methods described herein are applicable to any measured response signal.
    Language English
    Publishing date 2023-06-05
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1472677-4
    ISSN 1089-7682 ; 1054-1500
    ISSN (online) 1089-7682
    ISSN 1054-1500
    DOI 10.1063/5.0152209
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  9. Article ; Online: Semiconductor thermionics for next generation solar cells: photon enhanced or pure thermionic?

    Rahman, Ehsanur / Nojeh, Alireza

    Nature communications

    2021  Volume 12, Issue 1, Page(s) 4622

    Abstract: Semiconductors have been used in solar energy conversion for decades based on the photovoltaic effect. An important challenge of photovoltaics is the undesired heat generated within the device. An alternative approach is thermionics, which uses the ... ...

    Abstract Semiconductors have been used in solar energy conversion for decades based on the photovoltaic effect. An important challenge of photovoltaics is the undesired heat generated within the device. An alternative approach is thermionics, which uses the thermal excitation of electrons from an emitter to a collector across a vacuum gap. If the emitter is a p-type semiconductor, the photogeneration-induced quasi-Fermi level splitting can reduce the effective barrier for electron emission-a mechanism used by a photon enhanced thermionic emission device. Here, we evaluate the prospects of this alternative solar conversion technology considering different semiconductor materials and thermionic device configurations. We also reveal that whether such a device operates in the photon enhanced or purely thermionic mode, depends on the complex interplay among materials properties, device physics and solar concentration level.
    Language English
    Publishing date 2021-07-30
    Publishing country England
    Document type Journal Article
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-021-24891-2
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  10. Article ; Online: Response to: Neutralizing Antibodies to Botulinum Toxin Type A Are Rare Following Aesthetic Indications.

    Rahman, Eqram / Mosahebi, Ash

    Aesthetic surgery journal

    2021  Volume 41, Issue 11, Page(s) NP1802–NP1803

    MeSH term(s) Antibodies, Neutralizing ; Botulinum Toxins, Type A/adverse effects ; Esthetics ; Humans ; Neuromuscular Agents/adverse effects
    Chemical Substances Antibodies, Neutralizing ; Neuromuscular Agents ; Botulinum Toxins, Type A (EC 3.4.24.69)
    Language English
    Publishing date 2021-08-01
    Publishing country England
    Document type Letter ; Comment
    ZDB-ID 2087022-X
    ISSN 1527-330X ; 1090-820X ; 1084-0761
    ISSN (online) 1527-330X
    ISSN 1090-820X ; 1084-0761
    DOI 10.1093/asj/sjab319
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