Mahidol University's Institutional Repository

คลังสารสนเทศสถาบันของมหาวิทยาลัยมหิดล

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Recent Submissions

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Culinary linguistic landscapes of emerging Chinatowns: the case of Huai Khwang, Bangkok
(2026-01-01) Wu J.; Robinson-Jones C.; Chik A.; Wu J.; Mahidol University
While traditional Chinatowns have been widely studied, less is known about how Chinese diasporic communities become visible in emerging Chinatowns. Since restaurant signage is both prominent and economically driven, the culinary linguistic landscape is an ideal site for examining how multilingual and multimodal resources convey cultural authenticity and commercial branding. This study analyses 109 photographs of signage from 32 Chinese restaurants in Huai Khwang, an emerging Chinatown in urban Bangkok, Thailand, using a multimodal linguistic landscape approach. Four semiotic practices were identified: commodification of regional authenticity; multimodal semiotics (e.g. lanterns and couplets), the (localised) recontextualisation of Chinese semiotic resources, and internet catchphrase-themed fake street signs. Simplified Chinese predominates, suggesting an orientation towards co-ethnic audiences and mainland China, while Thai and English function as access, regulatory, and marketing resources. Huai Khwang’s ‘emergence’ as a Chinatown is thus characterised by the dominance of Simplified Chinese in combination with recognisable Chinese semiotic resources, in contrast to the prevalence of Traditional Chinese in many long-established Chinatowns. Restaurant signage therefore functions as a multimodal semiotic resource communicating Chineseness while serving commercial goals. These findings extend discussions on commodification and diasporic place-making and offer insights relevant to urban governance in rapidly transforming migrant commercial districts.
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Comparison of Prone and Supine Positions for Suction Mini Percutaneous Nephrolithotomy (PCNL) for Kidney Stone Disease. Results from a Prospective Multicenter Series from the Endourology Section of the European Association of Urology and the Suction Mini-PCNL Collaborative Study Group
(2026-03-01) Castellani D.; Gauhar V.; Kalathia J.; Mehta A.; Gadzhiev N.; Malkhasyan V.; Kumar N.; Kalbit R.H.; Gorgotsky I.; Gokce M.I.; Laymon M.; Inoue T.; Tak G.R.; Baker A.; Dholaria P.; Chawla A.; Beltrán-Suárez E.; Mahajan A.; Fong K.Y.; Yuen S.K.K.; Tan K.; Omar M.; Petkova K.; Taguchi K.; Ketsuwan C.; Lakmichi M.A.; Palaniappan S.; Tanidir Y.; Akdogan N.; Cepeda M.; Martov A.; Tokhtiyev Z.; Tzelves L.; Skolarikos A.; Acuña E.; Zawadzki M.; Kamal W.; Lopes L.G.; Gorelov D.; Agrawal M.S.; Mohan V.C.; Herrmann T.R.W.; Somani B.K.; Castellani D.; Mahidol University
Background and objective: The optimal patient position for percutaneous nephrolithotomy (PCNL) remains a matter of debate. Our aim was to evaluate the association between prone versus supine positioning and perioperative and postoperative outcomes of suction mini-PCNL. Methods: In this prospective multicenter observational study, we analyzed data for 1534 patients treated in 30 centers between March and November 2024. Outcomes included the stone-free rate (SFR) assessed via 30-d computed tomography, and complication rates. Multivariable analysis was used to assess the effect of prone positioning on stone-free status (zero fragments) and overall complications, with adjustment for other covariates. Key findings and limitations: There were 653 patients (43%) in the prone group and 881 (57%) in the supine group. Patient demographics were similar between the groups, except for body mass index. In terms of Guy's stone score, the prone group had a higher proportion of score 1 stones (60% vs 47%) and the supine group a higher proportion of score 4 stones (6.9% vs 3.2%). Median stone volume did not differ significantly, at 1636 mm3 in the supine group and 1725 mm3 in the prone group (p = 0.7). The prone group had more frequent use of spinal anesthesia (68% vs 29%; p < 0.001), fluoroscopy-only guidance (86% vs 61%; p < 0.001), and supracostal access (36% vs 22%; p < 0.001). Surgical time, pain scores, hospital length of stay, and readmission rates were similar between the groups. Zero-fragment stone-free rates were comparable (85% prone vs 81% supine; p = 0.052). Prone position was associated with higher rates of blood transfusion (2.8% vs 0%; p < 0.001), renal pelvic perforation (2.8% vs 0.23%; p < 0.001), and pneumothorax (1.5% vs 0%; p < 0.001). Multivariable analysis revealed that prone positioning was not significantly associated with grade A stone-free status (odds ratio 0.92, 95% confidence interval [CI] 0.66–1.29; p = 0.6) or the overall complication rate (odd ratio 0.87, 95% CI 0.59–1.28; p = 0.5). The nonrandomized study design may have introduced selection bias and limited our ability to establish causal relationships between variables. Conclusions and clinical implications: Both prone and supine positioning for PCNL achieved excellent SFRs with acceptable safety profiles.
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See, Touch, Feel, and Express: Achieving Safe and Natural Outcomes With HA Fillers—An International Consensus
(2026-03-01) Suwanchinda A.; Choi H.; Corduff N.; Cui H.; Garcia L.G.T.; Kerscher M.; Lim T.S.; Ong O.; Park J.Y.; Praditsuwan D.; Siew T.W.; Tseng F.W.; Wu R.; Pavicic T.; Suwanchinda A.; Mahidol University
Background: The concept of “natural outcomes” in filler treatments has been explored in clinical studies and literature, yet remains loosely defined, subjective, and lacks standardized assessment criteria. Aims: To propose a multidimensional Natural Outcomes Framework to systematically define, assess, and communicate natural outcomes following hyaluronic acid (HA) filler treatment, facilitating attainment of desired results. Methods: An international aesthetic multidisciplinary panel developed consensus statements and a practical framework for achieving safe and natural outcomes with HA fillers based on insights from a literature review, survey, and expert meeting. Results: This expert consensus emphasizes safety as a foundational aspect of natural outcomes. The framework extends beyond visual outcomes (“See”) to encompass tactile (“Touch”), experiential (“Feel”) and expressive (“Express”) dimensions of naturalness, which can be assessed by various methods. The panel identified three categories of factors affecting natural outcomes: product, patient, and injector factors. Treatment can be optimized by selecting HA fillers with biomimetic design, suitable rheological properties, and low inflammatory potential; ensuring knowledge and technical competency; individualizing treatment plans; and fostering effective communication. A practical clinical workflow was devised to guide the attainment and assessment of safe and natural outcomes from pre-treatment to follow-up. Conclusions: The Natural Outcomes Framework offers a structured approach to achieving safe and desired outcomes with HA fillers, aligned with this principle: “treat the patient, not the photograph.” It promotes patient-practitioner alignment on treatment goals and use of appropriate products based on biomimetic design principles, contributing to the attainment of predictable and satisfying results with aesthetic HA filler treatments.
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Development of EWMA Control Chart for Detecting Changes in AR(p) with Quadratic Trend Model
(2026-02-27) Jirawattanapalin Y.; Phanyaem S.; Jirawattanapalin Y.; Mahidol University
This study is intended to propose a formula for the Average Run Length (ARL) of the Exponentially Weighted Moving Average (EWMA) control chart when the observed data follow an autoregressive model of order p with quadratic trend. This research emphasizes the fundamental importance of developing precise ARL computation techniques with optimal processing efficiency, as ARL remains the predominant criterion for control chart performance evaluation. The derivation of the explicit ARL formula employs Fredholm’s integral equation methodology, with solution uniqueness assured through the application of Banach’s Fixed Point Theorem. Performance validation involves comparative analysis against approximate ARL values obtained via Numerical Integral Equation (NIE) approaches, specifically utilizing the Midpoint rule technique. The efficiency of the explicit formula of ARL is evaluated using two criteria: absolute percentage difference and CPU Time. The empirical results confirm that the ARL values derived from the explicit formula closely approximate those obtained via numerical integral equation methods, exhibiting an absolute percentage difference of less than 0.001%. Computationally, the proposed explicit formula achieves processing times of approximately 0.001 seconds, while the Midpoint rule method takes 2-3 seconds. In conclusion, the results demonstrate that the proposed explicit ARL formulas for EWMA charts provide accuracy comparable to the NIE method while significantly reducing computational time. This confirms the efficiency and practice applicability to the explicit formulas for monitoring real-world data, such as pneumonia cases at Siriraj Hospital.