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15. In situ resin‐injection approach for repairing barely visible impact damaged carbon‐fiber reinforced epoxy laminates: Optimizing the repair parameters using Taguchi method.

Author

Lai, W. L., Saeedipour, H., Wong, W. L. E., and Goh, K. L.

Subjects
TAGUCHI methods, LAMINATED materials, EPOXY resins, TRANSFER molding, ELASTICITY, MECHANICAL efficiency, REPAIRING, ATMOSPHERIC pressure
Abstract

A new portable resin injection device has been developed to repair barely visible impact damage (BVID) in carbon fiber reinforced polymer (CFRP) laminates. Repair was conducted on damaged 16‐ and 24‐ply laminates at two different ambient pressures, that is, atmospheric pressure and vacuum, using three different adhesive types, that is, neat epoxy, epoxy blended with respective halloysite nanotubes (E1HNT) and carbon nanotubes (NF100). The repair effectiveness was assessed by infrared thermography and in‐plane compression testing. All damaged laminates suffered significant degradation in fracture properties as compared to pristine laminates. According to Taguchi method, the main factor affecting the repair efficiency is the laminate ply number. The findings revealed that the optimal repair parameters corresponds to using neat epoxy or E1HNT in vacuum could restore the elastic properties and using E1HNT adhesive at atmospheric pressure could restore the fracture properties of damaged 16‐ply laminate after repair. Regardless of repair parameters, the repair efficiency for the mechanical properties of 24‐ply laminates revealed minimal restoration to the laminate pristine conditions after repairing the damaged laminates due to the complexity of BVID for allowing the adhesive to infiltrate and filled the crack structures. The choice of repair parameters was discussed based on the effectiveness of restoring elastic and fracture properties. [ABSTRACT FROM AUTHOR]

Published
2023
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29. Worldwide Management of Inflammatory Bowel Disease During the COVID-19 Pandemic: An International Survey

Author

Bernstein, Charles N, Ng, Siew C, Banerjee, Rupa, Steinwurz, Flavio, Shen, Bo, Carbonnel, Franck, Hamid, Saeed, Sood, Ajit, Yamamoto-Furusho, Jesus K, Griffiths, Anne, Benchimol, Eric I, Travis, Simon, Lopes, Susana, Rubin, David T, Kaplan, Gilaad G, Armstrong, David, Gearry, Richard, Rahman, M Masudur, Mohsin, Mostafa N, Vieira, Andrea, Salgado, Nayara Carvalho, Machado, Marta Brenner, Wu, Hao, Mak, Joyce W Y, Miao, Ying-Lei, Abdullah, Murdani, Chowers, Yehuda, Ogutu, Elly, Devani, Smita, Yang, Suk-Kyun, Omar, Mahmoud, Goh, K L, Hilmi, Ida, Raja Ali, Raja Affendi, Aye, Than Than, Wai, Tin Moe, Joshi, Neeraj, Abbas, Zaigham, Magro, Fernando, Sollano, Jose, Torres, Esther A, Mohiuddin, Syed Adnan, Diculescu, Mircea, Almadi, Majid, Ong, David, Watermeyer, Gillian, Metthananda, Navarathne, Wei, Shuchen, Limsrivilai, Julajak, Pausawasdi, Nonthalee, Pisepongsa, Pises, Kochhar, Gursimran, Rodríguez, Ximena, and Viet, Dao

Subjects
medicine.medical_specialty, Coronavirus disease 2019 (COVID-19), Ibdjnl/9, COVID-9, Global Health, Inflammatory bowel disease, 03 medical and health sciences, Original Research Article—Clinical, 0302 clinical medicine, inflammatory bowel disease, Pandemic, Health care, medicine, Immunology and Allergy, Humans, Practice Patterns, Physicians', 030304 developmental biology, AcademicSubjects/MED00260, 0303 health sciences, business.industry, SARS-CoV-2, pandemic, International survey, Gastroenterology, COVID-19, Disease Management, Guideline, medicine.disease, Inflammatory Bowel Diseases, 3. Good health, Underlying disease, Steroid use, Family medicine, Health Care Surveys, 030211 gastroenterology & hepatology, immunomodulatory therapy, business, management
Abstract

Background and Aims Persons with inflammatory bowel disease (IBD) may be particularly vulnerable to COVID-19 either because of their underlying disease or its management. Guidance has been presented on the management of persons with IBD in the time of this pandemic by different groups. We aimed to determine how gastroenterologists around the world were approaching the management of IBD. Methods Members of the World Gastroenterology Organization (WGO) IBD Task Force contacted colleagues in countries largely beyond North America and Europe, inviting them to review the WGO website for IBD and COVID-19 introduction, with links to guideline documents, and then to respond to 9 ancillary open-ended management questions. Results Fifty-two gastroenterologists from 33 countries across 6 continents completed the survey (April 14 to May 16, 2020). They were all adhering for the most part to published guidelines on IBD management in the COVID-19 era. Some differences and reductions in services related to access, and some related to approach within their communities in terms of limiting virus spread. In particular, most gastroenterologists reduced in-person clinics (43 of 52), limited steroid use (47 of 51), limited elective endoscopy (45 of 52), and limited elective surgeries (48 of 51). If a patient was diagnosed with COVID-19, immunomodulatory therapy was mostly held. Conclusions In most countries, the COVID-19 pandemic significantly altered the approach to persons with IBD. The few exceptions were mostly based on low burden of COVID-19 in individual communities. Regardless of resources or health care systems, gastroenterologists around the world took a similar approach to the management of IBD.

Published
2020

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