408 results on '"Ramaiya P"'
Search Results
2. Right atrial myxoma excision with pulmonary thrombectomy
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Chandrasekaran, Ananthanarayanan, Mayilsamy, Karthikaa, Muthukumaran, Naveena, Manthiramoorthy, Saigopalakrishnan, Murugesan, Periyanarkunan Ramaiya, Chinnasamy, Ganesan, Sukumar, Murugan Murugan, Gnanasekaran, Pradeep, Junior, Kevin Patrick, and Krishnan, Deepa
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- 2024
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3. Cultivation of edible Caulerpa species in Malaysia: Current status and future prospects for sustainable aquaculture
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Ismail, Mohd Fakhrulddin, Abdullah, Farah Izana, Ismail, Illisriyani, Karim, Murni Marlina Abd, Ramaiya, Shiamala Devi, Benjamin, Mohammad Amil Zulhilmi, Awang, Mohd Azrie, and Zakaria, Muta Harah
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- 2024
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4. From guidelines to radiology practice: navigating the 2023 ASCO guidelines for advanced gastroesophageal cancer and beyond
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Tippareddy, Charit, Martinez, Orlando M., Benza, Andrew R., Bera, Kaustav, Ramaiya, Nikhil, and Tirumani, Sree Harsha
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- 2024
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5. The Association Between Expanded ACEs and Behavioral Health Outcomes Among Youth at First Time Legal System Contact
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Folk, Johanna B, Ramaiya, Megan, Holloway, Evan, Ramos, Lili, Marshall, Brandon DL, Kemp, Kathleen, Li, Yu, Bath, Eraka, Mitchell, Daphne Koinis, and Tolou-Shams, Marina
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Psychology ,Applied and Developmental Psychology ,Substance Misuse ,Youth Violence Prevention ,Pediatric ,Prevention ,Youth Violence ,Behavioral and Social Science ,Violence Research ,Physical Injury - Accidents and Adverse Effects ,Pediatric Research Initiative ,Peace ,Justice and Strong Institutions ,Good Health and Well Being ,Humans ,Adolescent ,Child ,Adverse Childhood Experiences ,Prospective Studies ,Violence ,Bullying ,Outcome Assessment ,Health Care ,Adverse childhood experiences ,Juvenile justice ,Child welfare ,Substance misuse ,Psychopathology - Abstract
A growing body of literature has documented high rates of adverse childhood experiences (ACEs) and their effects on behavioral health among adolescents impacted by the juvenile legal system. Most research with justice-impacted youth assesses the ten standard ACEs, encompassing abuse, neglect, and household dysfunction. This body of work has largely ignored the five expanded ACEs which assess social and community level adversity. Justice-impacted youth commonly experience expanded ACEs (racial discrimination, placement in foster care, living in a disadvantaged neighborhood, witnessing violence, bullying), and inclusion of these adversities may enhance predictive utility of the commonly used ACEs score. The current study examined the prospective impact of total ACEs (standard and expanded) on alcohol and cannabis use, substance-related consequences, and psychiatric symptoms during the year following first ever contact with the juvenile court. Results indicate justice-impacted youth experience multiple expanded ACEs prior to first court contact. The expanded ACEs did not predict any of the behavioral health outcomes assessed, over and above the standard ACEs. Inclusion of expanded ACEs in the standard ACEs score may not increase utility in identifying prospective behavioral health outcomes among youth in first time contact with the juvenile legal system.
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- 2023
6. Emergency department imaging utilization post-transcatheter aortic valve replacement: single institution 7-year experience
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Chau, Eva, Mew, Andy, Bera, Kaustav, Jiang, Sirui, Ramaiya, Nikhil, and Gilkeson, Robert
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- 2024
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7. 3.0-T MR-guided transgluteal in-bore-targeted prostate biopsy under local anesthesia in patients without rectal access: a single-institute experience and review of literature
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Bera, Kaustav, Ramaiya, Nikhil, Paspulati, Raj Mohan, Nakamoto, Dean, and Tirumani, Sree Harsha
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- 2024
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8. Protocol for a Randomized Controlled Trial of a Family-Based Mental Health Navigator Intervention for Youth in the Child Welfare System (Preprint)
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Tolou-Shams, Marina, Ramaiya, Megan, Lara Salas, Jannet, Ezimora, Ifunanya, Shumway, Martha, Duerr Berrick, Jill, Aguilera, Adrian, Borsari, Brian, Dauria, Emily, Friedling, Naomi, Holmes, Crystal, and Grandi, Adam
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Good Health and Well Being ,child welfare–involved youth ,community engagement ,digital health technology ,foster care ,implementation science ,navigator interventions ,randomized clinical trial ,Clinical Sciences ,Public Health and Health Services ,Health services and systems ,Public health - Abstract
BackgroundYouth in the child welfare system (child welfare-involved [CWI] youth) have high documented rates of mental health symptoms and experience significant disparities in mental health care services access and engagement. Adolescence is a developmental stage that confers increased likelihood of experiencing mental health symptoms and the emergence of disorders that can persist into adulthood. Despite a high documented need for evidence-based mental health services for CWI youth, coordination between child welfare and mental health service systems to increase access to care remains inadequate, and engagement in mental health services is low. Navigator models developed in the health care field to address challenges of service access, fragmentation, and continuity that affect the quality of care provide a promising approach to increase linkage to, and engagement in, mental health services for CWI youth. However, at present, there is no empirically supported mental health navigator model to address the unique and complex mental health needs of CWI youth and their families.ObjectiveUsing a randomized controlled trial, this study aims to develop and test a foster care family navigator (FCFN) model to improve mental health service outcomes for CWI adolescents (aged 12-17 years).MethodsThe navigator model leverages an in-person navigator and use of adjunctive digital health technology to engage with, and improve, care coordination, tracking, and monitoring of mental health service needs for CWI youth and families. In total, 80 caregiver-youth dyads will be randomized to receive either the FCFN intervention or standard of care (clinical case management services): 40 (50%) to FCFN and 40 (50%) to control. Qualitative exit interviews will inform the feasibility and acceptability of the services received during the 6-month period. The primary trial outcomes are mental health treatment initiation and engagement. Other pre- and postservice outcomes, such as proportion screened and time to screening, will also be evaluated. We hypothesize that youth receiving the FCFN intervention will have higher rates of mental health treatment initiation and engagement than youth receiving standard of care.ResultsWe propose enrollment of 80 dyads by March 2024, final data collection by September 2024, and the publication of main findings in March 2025. After final data analysis and writing of the results, the resulting manuscripts will be submitted to journals for dissemination.ConclusionsThis study will be the first to produce empirically driven conclusions and recommendations for implementing a family mental health navigation model for CWI youth with long-standing and unaddressed disparities in behavioral health services access. The study findings have potential to have large-scale trial applicability and be feasible and acceptable for eventual system implementation and adoption.Trial registrationClinicalTrials.gov NCT04506437; https://www.clinicaltrials.gov/study/NCT04506437.International registered report identifier (irrid)DERR1-10.2196/49999.
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- 2023
9. Mid-level healthcare workers knowledge on non-communicable diseases in Tanzania: a district-level pre-and post-training assessment
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Peter Karoli, Mary Mayige, Gibson Kagaruki, Amani Mori, Edgar Macha, Reuben Mutagaywa, Arafa Momba, Harrieth Peter, Ritha Willilo, Pilly Chillo, Aidan Banduka, Bruno Sunguya, Kaushik Ramaiya, Edna Majaliwa, Stella Malangahe, Renatus Nyarubamba, Esther Mtumbuka, Elizabeth Mallya, Deogratias Soka, Sarah Urasa, Willfredius Rutahoile, Best Magoma, Emiliana Donald, David Mwenesano, and Kajiru Kilonzo
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Knowledge ,Non-communicable diseases ,Diabetes ,Rheumatic heart disease ,Sickle cell disease ,PEN plus ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Introduction Over the past two decades, Tanzania’s burden of non-communicable diseases has grown disproportionately, but limited resources are still prioritized. A trained human resource for health is urgently needed to combat these diseases. However, continuous medical education for NCDs is scarce. This paper reports on the mid-level healthcare workers knowledge on NCDs. We assessed the knowledge to measure the effectiveness of the training conducted during the initiation of a Package for Essential Management of Severe NCDs (PEN Plus) in rural district hospitals in Tanzania. Methods The training was given to 48 healthcare employees from Dodoma Region’s Kondoa Town Council District Hospital. For a total of five (5) days, a fundamental course on NCDs featured in-depth interactive lectures and practical workshops. Physicians from Tanzania’s higher education institutions, tertiary university hospitals, research institutes, and medical organizations served as trainers. Before and after the training, a knowledge assessment comprising 28 questions was administered. Descriptive data analysis to describe the characteristics of the specific knowledge on physiology, diagnosis and therapy of diabetes mellitus, rheumatic fever, heart disease, and sickle cell disease was done using Stata version 17 (STATA Corp Inc., TX, USA). Results Complete assessment data for 42 out of the 48 participants was available. Six participants did not complete the training and the assessment. The mean age of participants was 36.9 years, and slightly above half (52%) were above 35 years. Two-thirds (61.9%) were female, and about half (45%) were nurses. The majority had the experience of working for more than 5 years, and the average was 9.4 years (+/- 8.4 years). Overall, the trainees’ average scores improved after the training (12.79 vs. 16.05, p
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- 2024
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10. Understanding the association between menstrual health and hygiene attitudes and personal agency among very young adolescents in Sao Paulo, Brazil: A cross-sectional study
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Ana Luiza Vilela Borges, Christiane Borges do Nascimento Chofakian, Cristiane da Silva Cabral, and Astha Ramaiya
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Medicine - Abstract
Background: Although menstruation is a monthly biological phenomenon, it is shrouded in stigma and shame which directly impacts health, education, gender equality, decent work, and economic growth. However, there is scarce evidence on how personal agency, an individual’s ability to access resources, may act as a protective factor to adequate menstrual health and hygiene practices. Therefore, we assess the association between attitudes toward menstruation and personal agency among very young adolescent girls. Methods: We use cross-sectional data from the Global Early Adolescent Study in São Paulo, Brazil, among 10- to 14-year-old girls who have experienced menarche ( n = 325) and completed a home-based self-administered questionnaire in 2021. “Attitudes toward menstruation” was created based on five indicators on a Likert scale, with a higher score indicating more positive attitudes. The main covariate was personal agency, comprised of three scales and modeled as three continuous variables: voice, decision-making power, and freedom of movement. Data were analyzed using multivariable linear regression. Results: Attitudes toward menstruation mean score was 12.5 (range 5–19). Older adolescents (12–14 years-old) had higher mean scores (more positive) than younger adolescents (10–11 years-old) on attitudes toward menstruation, whereas no other sociodemographic or menstrual health indicator (knowledge or access to products) were associated with attitudes toward menstruation. In the multiple regression model, older age and higher freedom of movement remained positively associated with attitudes toward menstruation (β adjust = 0.5; 95%CI 0.1 to 0.8). Conclusion: Positive attitudes toward menstruation are associated with higher freedom of movement among very young Brazilian adolescent girls. The promotion of personal agency should be recognized as key strategies to accelerate young girls’ positive approaches to their own menstruation and, consequently, well-being.
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- 2024
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11. Characterization of indigenous Durio species from Sarawak, Borneo: relationships between chemical composition and sensory attributes
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Gerevieve Bangi Sujang, Shiamala Devi Ramaiya, Shiou Yih Lee, and Muta Harah Zakaria
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Indigenous durians ,Wild species ,Durian ,Nutritional properties ,Sensory ,Phytochemical ,Medicine ,Biology (General) ,QH301-705.5 - Abstract
Sarawak, Borneo, harbours 16 unique Durio species, half of which are edible, with only Durio zibethinus widely cultivated. Despite their nutritional and economic significance to the rural communities in Sarawak, the lesser-known indigenous durians remain underrepresented in the scientific literature while facing the risk of extinction in the wild. Thus, the aim of this study was to conduct comprehensive chemical analyses of these wild edible durians, offering insights into their nutritional and sensory taste attributes. The edible part was separated at optimal ripeness, and the samples were subjected to further analysis. Wild edible durian genotypes exhibit varied characteristics, even within the same species. The majority of wild durians are characterized by a sugar composition consisting predominantly of sucrose, constituting 67.38–96.96%, except for the red-fleshed Durio graveolens renowned for its low total sugar content (0.49 ± 0.17 g per 100 g). Despite its bland taste, this species possessed significantly greater fat (14.50 ± 0.16%) and fibre (12.30 ± 0.14%) content. Durio dulcis exhibited a significantly greater carbohydrate content (29.37–30.60%), and its intense smell was attributed to its low protein content (2.03–2.04%). Indigenous durians offer substantial percentages of daily mineral intake, with 100 g servings providing approximately 15.71–26.80% of potassium, 71.72–86.52% of phosphorus, 9.33–27.31% of magnesium, and sufficient trace minerals. The vibrant flesh colours of yellow-, orange- and red-fleshed Durio graveolens and Durio kutejensis show high levels of ascorbic acid (31.41–61.56 mg 100 g−1), carotenoids (976.36–2627.18 µg 100 g−1) and antioxidant properties, while Durio dulcis and Durio oxleyanus, despite their dull flesh, contained high phenolic (67.95–74.77 mg GAE 100 g−1) and flavonoid (8.71–13.81 QE mg 100 g−1) levels. These endeavours provide a deeper understanding of the nutritional richness of wild edible durians, thereby supporting commercialization and conservation efforts.
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- 2024
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12. Toxicity Detection for Indic Multilingual Social Media Content
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Jhaveri, Manan, Ramaiya, Devanshu, and Chadha, Harveen Singh
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Computer Science - Computation and Language - Abstract
Toxic content is one of the most critical issues for social media platforms today. India alone had 518 million social media users in 2020. In order to provide a good experience to content creators and their audience, it is crucial to flag toxic comments and the users who post that. But the big challenge is identifying toxicity in low resource Indic languages because of the presence of multiple representations of the same text. Moreover, the posts/comments on social media do not adhere to a particular format, grammar or sentence structure; this makes the task of abuse detection even more challenging for multilingual social media platforms. This paper describes the system proposed by team 'Moj Masti' using the data provided by ShareChat/Moj in \emph{IIIT-D Multilingual Abusive Comment Identification} challenge. We focus on how we can leverage multilingual transformer based pre-trained and fine-tuned models to approach code-mixed/code-switched classification tasks. Our best performing system was an ensemble of XLM-RoBERTa and MuRIL which achieved a Mean F-1 score of 0.9 on the test data/leaderboard. We also observed an increase in the performance by adding transliterated data. Furthermore, using weak metadata, ensembling and some post-processing techniques boosted the performance of our system, thereby placing us 1st on the leaderboard., Comment: It was meant for IEEE BigM conference
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- 2022
13. Metformin for the prevention of diabetes among people with HIV and either impaired fasting glucose or impaired glucose tolerance (prediabetes) in Tanzania: a Phase II randomised placebo-controlled trial
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Garrib, Anupam, Kivuyo, Sokoine, Bates, Katie, Ramaiya, Kaushik, Wang, Duolao, Majaliwa, Edna, Simbauranga, Rehema, Charles, Godbless, van Widenfelt, Erik, Luo, Huanyan, Alam, Uazman, Nyirenda, Moffat J., Jaffar, Shabbar, and Mfinanga, Sayoki
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- 2023
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14. Formative qualitative research on the potential for digital solutions to address diabetes care gaps in Tanzania and Sri Lanka
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Ishu Kataria, Kaushik Ramaiya, Omary Ubuguyu, Sumithra Krishnamurthy Reddiar, Angela M Jackson-Morris, Michael J Calopietro, Manilka R Sumanathilleke, Champika Wickramasinghe, Bakari Salum, David P Ngilangwa, Festo K Shayo, Vijayapala Sinnathamby, and Appu Hennedi Totahewage Lihini Sandunika de Silva
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Medicine - Abstract
Objectives Diabetes care remains unavailable and unaffordable for many people. Adapting models of care to low-income and middle-income country contexts is a priority. Digital technology offers substantial potential yet must surmount health system, technological and acceptability issues. This formative research aimed to identify the potential for a digital technology solution (Diabetes Compass) to address diabetes care gaps in primary healthcare.Design Qualitative research was conducted in selected districts of Sri Lanka and Tanzania with practitioners, patients and family members. In-depth interviews assessed how digital solutions may improve diabetes care, acceptability and usability; contextual and clinical observations identified practitioner clinical competencies, strengths and weaknesses, and the influence of the care environment on service delivery; and workshop discussions explored strategies to encourage digital solution uptake and sustain use.Setting The research was undertaken in 2022 at nine health facilities in Sri Lanka’s Southern Province (Galle), and 16 health facilities in Tanzania’s Lindi and Pwani Regions.Participants Participants included primary and secondary care practitioners, facility managers, patients and family members.Results There was striking concordance in the diabetes care gaps and potential for digital solutions in the two countries, and between practitioners, patients and family members. Five main gaps were practitioner training; health information systems and data; service delivery; infrastructure, equipment and medication; and community awareness and knowledge. Practitioners, patients and family members saw strong potential for digital solutions to improve early detection, diagnosis, secondary prevention of complications and improve patients’ and families’ experience of living with diabetes. They identified specific design and implementation considerations to enable the Diabetes Compass to realistically meet these needs and overcome challenges.Conclusion There was a strong appetite among practitioners, patients and family members for a digital solution to strengthen diabetes care. Their experience of challenges and practical recommendations informed the Diabetes Compass design.
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- 2024
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15. Understanding how socioecological factors affect COVID-19 vaccine perceptions among adolescents: qualitative evidence from seven high-, middle- and low-income countries
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Astha Ramaiya, Kristin Mmari, Ana Luiza Borges, Christiane Cabral, Eric Mafuta, Aimee Lulebo, Chunyan Yu, Anggriyani Wahyu Pinandari, Siswanto Agus Wilopo, Effie Chipeta, and Kara Hunersen
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Public aspects of medicine ,RA1-1270 - Abstract
# Background The number of studies examining family, community, institutional and policy factors on COVID-19 vaccine perceptions is limited, with most concentrating on high-income countries and using predominantly quantitative methods. To address this gap, the goal of this manuscript is to qualitatively explore these factors and how they shape adolescents’ perspectives on COVID-19 vaccines across diverse contexts. # Methods Focus group discussions were conducted among adolescent populations (13 - 18 years) across seven countries: Ghent, Belgium; Sao Paulo, Brazil, Shanghai; China, Kinshasa, Democratic Republic of Congo (DRC); Semarang and Denpasar, Indonesia; Blantyre, Malawi and New Orleans, United States of America (USA). An inductive thematic analytical approach was used to understand the emerging themes across the different countries based on the study’s objectives. # Results The study found that all influences were inter-connected and contributed towards vaccine perceptions among adolescents, which were largely positive except in the two African countries and to an extent in the USA. Family and community influences played a large role in vaccine perceptions, however, this differed by context. Our findings suggest adolescents’ perceptions about vaccines were more positive in countries with higher vaccination rates, i.e. China and Indonesia versus countries with lower vaccination rates i.e. Malawi and DRC. Vaccine mandates within schools, offices, and public places were also discussed with varying perceptions based on government trust. # Conclusions Adolescents’ perceptions of the Covid-19 vaccine are based on a variety of elements, such as families, community, institutions, and policies. Prioritizing one or another path may not be sufficient to improve vaccine adherence during future pandemics, as we experienced with Covid-19. Strategies to make vaccine perceptions more positive among urban poor adolescents should address both family and community perceptions. However, policies and robust programs around immunization are still needed.
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- 2024
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16. Latent tuberculosis in children and youth with type 1 diabetes mellitus in Dar es Salaam, Tanzania: a cross section survey
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Edna S. Majaliwa, Kandi Muze, Evance Godfrey, Kenneth Byashalira, Blandina T Mmbaga, Kaushik Ramaiya, and Sayoki G Mfinanga
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Diabetes ,T1DM ,Glycaemic ,Latent tuberculosis ,Children ,Youth ,Infectious and parasitic diseases ,RC109-216 - Abstract
Abstract Background Data for latent tuberculosis in patients with type 1 Diabetes in Africa is limited. We assessed the prevalence of latent tuberculosis in youth and children with type 1 Diabetes in Dar es Salaam –Tanzania. Methods Our cross-sectional study recruited children and youth with T1DM by stage of puberty, glycaemic control, and age at diagnosis from January to December 2021 in Dar es Salaam. Participants were screened for the presence of latent Tuberculosis using the QuantiFERON test. A positive test was considered to have latent TB. Results Of the 281 participants, the mean age was 19 (± 6) years, 51.2% were female, and 80.8% had either a primary or secondary level of education at baseline. The prevalence of latent TB was 14.9% and was slightly higher in females (52.4%) than in males. This difference, however, was insignificant (p > 0.05). On the other hand, the proportion of latent TB was significantly higher in uncontrolled HbA1c levels (76.2%) than in those with controlled HbA1c (23.8%) [p = 0.046]. Duration of diabetes and age at diagnosis did not affect the occurrence of latent Tuberculosis [p > 0.05]. Meanwhile, in the regression model, participants with latent TB were more likely to have uncontrolled HbA1c. [p = 0.045] Conclusions Despite the methodological limitations, this survey highlights the high prevalence of latent TB among children and youth with diabetes; shouting for better control. These results clearly show the need to screen for Tuberculosis in children and youth with diabetes and start them on prevention as per protocol, especially in tuberculosis-endemic areas like Tanzania.
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- 2023
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17. Emergency department imaging utilization of cancer patients treated with bevacizumab: single-institution 8-year experience
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Anderson, Wyatt, Bera, Kaustav, Smith, Daniel, Tirumani, Sree Harsha, and Ramaiya, Nikhil
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- 2023
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18. Role of pinch in Argon impurity transport in ohmic discharges of Aditya-U Tokamak
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K. Shah, J. Ghosh, S. Patel, M. B. Chowdhuri, K. A. Jadeja, G. Shukla, T. Macwan, A. Kumar, S. Dolui, K. Singh, R. L. Tanna, K. M. Patel, R. Dey, R. Manchanda, N. Ramaiya, R. Kumar, S. Aich, N. Yadava, S. Purohit, M. K. Gupta, U. C. Nagora, S. K. Pathak, P. K. Atrey, and K. B. K. Mayya
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Medicine ,Science - Abstract
Abstract We present experimental results of the trace argon impurity puffing in the ohmic plasmas of Aditya-U tokamak performed to study the argon transport behaviour. Argon line emissions in visible and Vacuum Ultra Violet (VUV) spectral ranges arising from the plasma edge and core respectively are measured simultaneously. During the experiments, space resolved brightness profile of Ar1+ line emissions at 472.69 nm (3p44s 2P3/2–3p44p 2D3/2), 473.59 nm (3p44s 4P5/2–3p44p 4P3/2), 476.49 nm (3p44s 2P1/2–3p44p 2P3/2), 480.60 nm (3p44s 4P5/2–3p44p 4P5/2) are recorded using a high resolution visible spectrometer. Also, a VUV spectrometer has been used to simultaneously observe Ar13+ line emission at 18.79 nm (2s22p 2P3/2–2s2p2 2P3/2) and Ar14+ line emission at 22.11 nm (2s2 1S0–2s2p 1P1). The diffusivity and convective velocity of Ar are obtained by comparing the measured radial emissivity profile of Ar1+ emission and the line intensity ratio of Ar13+ and Ar14+ ions, with those simulated using the impurity transport code, STRAHL. Argon diffusivities ~ 12 m2/s and ~ 0.3 m2/s have been observed in the edge (ρ > 0.85) and core region of the Aditya-U, respectively. The diffusivity values both in the edge and core region are found to be higher than the neo-classical values suggesting that the argon impurity transport is mainly anomalous in the Aditya-U tokamak. Also, an inward pinch of ~ 10 m/s mainly driven by Ware pinch is required to match the measured and simulated data. The measured peaked profile of Ar density suggests impurity accumulation in these discharges.
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- 2023
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19. Outcomes of Antineoplastic Immunotherapy at a Large Healthcare Organization: Impact of Provider, Race and Socioeconomic Status
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Mirsky MM, Mitchell C, Hong A, Cao S, Fu P, Margevicius S, Wu S, Dowlati A, Nelson A, Selfridge JE, Ramaiya N, Hoimes C, Alahmadi A, and Bruno DS
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disparities ,healthcare delivery ,immunotherapy outcomes ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Matthew M Mirsky,1 Carley Mitchell,1 Augustine Hong,1 Shufen Cao,2 Pingfu Fu,2 Seunghee Margevicius,2 Sulin Wu,1 Afshin Dowlati,1 Ariel Nelson,1 J Eva Selfridge,1 Nikhil Ramaiya,1 Christopher Hoimes,1 Asrar Alahmadi,1,* Debora S Bruno1,* 1University Hospitals Cleveland Medical Center, Case Western Reserve University School of Medicine, Cleveland, OH, USA; 2Department of Population and Quantitative Health Sciences, Case Western Reserve University School of Medicine, Cleveland, OH, USA*These authors contributed equally to this workCorrespondence: Debora S Bruno, University Hospitals Cleveland Medical Center, Case Western Reserve University School of Medicine, 11100 Euclid Avenue, Cleveland, OH, 44106, USA, Tel +1 216 844-3951, Email Debora.Bruno@uhhospitals.orgPurpose: Disparities in cancer care delivery remain a pressing health-care crisis within the United States (US). The use of immune checkpoint inhibitors (ICIs) and their management may be a disparity generator that impacts survival. This retrospective study assessed disparities in a cohort of patients with a variety of solid tumors treated with ICIs within a single health-care organization focusing on the impact of race, socioeconomic status (SES) and site of care delivery on survival and the development of severe immune-related adverse events (irAEs).Patients and Methods: Manual chart review was performed on all patients with solid tumors treated with ICIs within a health-care organization from 2012 to 2018. Care delivery was dichotomized as DOP (disease-oriented provider at academic center) and COP (community oncology provider). Primary and secondary outcomes were overall survival (OS) and rates of grade 3– 4 irAEs, respectively. Relationships with covariates of interest, including race, socioeconomic status and type of care delivery, were assessed among both outcomes.Results: A total of 1070 eligible patients were identified. Of those, 11.4% were of Black race, 59.7% had either non-small cell lung cancer (NSCLC) or melanoma and 82.8% had stage IV disease. Patients of Black race and lower SES were more likely to be treated by DOPs (p< 0.0001). A superior OS was associated with care delivered by DOPs when compared to COPs (HR 0.68; 95% CI 0.56– 0.84; p=0.0002), which was durable after accounting for race, SES, histopathologic diagnosis and disease stage. Melanoma patients experienced higher rates of severe irAEs (HR 2.37; 95% CI 1.42– 3.97; p=0.001). Race, SES and site of care delivery were not related to rates of severe irAEs.Conclusion: In a large health-care organization, patients treated with checkpoint inhibitors by DOPs benefited from a significant OS advantage that was durable after controlling for racial and socioeconomic factors, providing evidence that disease-oriented care has the potential to mitigate racial and socioeconomic disparities.Keywords: disparities, healthcare delivery, immunotherapy outcomes
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- 2023
20. User requirements for non-invasive and minimally invasive glucose self-monitoring devices in low-income and middle-income countries: a qualitative study in Kyrgyzstan, Mali, Peru and Tanzania
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David Beran, Maria Lazo-Porras, Kaushik Ramaiya, Maria Maixenchs, Stephane Besancon, Guillermo Z Martínez-Pérez, Castory Munishi, Silvana Perez-Leon, Elvis Safary, Beatrice Vetter, Molly Lepeska, Aida Abdraimova, Asel Dunganova, Jill Portocarrero Mazanett, and Happy Nchimbi
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Medicine - Abstract
Aims Development of non-invasive and minimally invasive glucose monitoring devices (NI-MI-GMDs) generally takes place in high-income countries (HICs), with HIC’s attributes guiding product characteristics. However, people living with diabetes (PLWD) in low-income and middle-income countries (LMICs) encounter different challenges to those in HICs. This study aimed to define requirements for NI-MI-GMDs in LMICs to inform a target product profile to guide development and selection of suitable devices.Methods This was a multiple-methods, exploratory, qualitative study conducted in Kyrgyzstan, Mali, Peru and Tanzania. Interviews and group discussions/activities were conducted with healthcare workers (HCWs), adults living with type 1 (PLWD1) or type 2 diabetes (PLWD2), adolescents living with diabetes and caregivers.Results Among 383 informants (90 HCW, 100 PLWD1, 92 PLWD2, 24 adolescents, 77 caregivers), a range of differing user requirements were reported, including preferences for area of glucose measurement, device attachment, data display, alert type and temperature sensitivity. Willingness to pay varied across countries; common requirements included ease of use, a range of guiding functions, the possibility to attach to a body part of choice and a cost lower than or equal to current glucose self-monitoring.Conclusions Ease-of-use and affordability were consistently prioritised, with broad functionality required for alarms, measurements and attachment possibilities. Perspectives of PLWD are crucial in developing a target product profile to inform characteristics of NI-MI-GMDs in LMICs. Stakeholders must consider these requirements to guide development and selection of NI-MI-GMDs at country level, so that devices are fit for purpose and encourage frequent glucose monitoring among PLWD in these settings.
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- 2024
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21. Author Correction: Role of pinch in Argon impurity transport in ohmic discharges of Aditya-U Tokamak
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Shah, K., Ghosh, J., Patel, S., Chowdhuri, M. B., Jadeja, K. A., Shukla, G., Macwan, T., Kumar, A., Dolui, S., Singh, K., Tanna, R. L., Patel, K. M., Dey, R., Manchanda, R., Ramaiya, N., Kumar, R., Aich, S., Yadava, N., Purohit, S., Gupta, M. K., Nagora, U. C., Pathak, S. K., Atrey, P. K., and Mayya, K. B. K.
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- 2023
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22. Latent tuberculosis in children and youth with type 1 diabetes mellitus in Dar es Salaam, Tanzania: a cross section survey
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Majaliwa, Edna S., Muze, Kandi, Godfrey, Evance, Byashalira, Kenneth, Mmbaga, Blandina T, Ramaiya, Kaushik, and Mfinanga, Sayoki G
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- 2023
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23. Role of pinch in Argon impurity transport in ohmic discharges of Aditya-U Tokamak
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Shah, K., Ghosh, J., Patel, S., Chowdhuri, M. B., Jadeja, K. A., Shukla, G., Macwan, T., Kumar, A., Dolui, S., Singh, K., Tanna, R. L., Patel, K. M., Dey, R., Manchanda, R., Ramaiya, N., Kumar, R., Aich, S., Yadava, N., Purohit, S., Gupta, M. K., Nagora, U. C., Pathak, S. K., Atrey, P. K., and Mayya, K. B. K.
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- 2023
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24. Measurement and Conceptualisation of Attitudes and Social Norms Related to Discrimination against Children with Disabilities: A Systematic Review
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Sood, Suruchi, Kostizak, Kelli, Stevens, Sarah, Cronin, Carmen, Ramaiya, Astha, and Paddidam, Priyanka
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Despite multiple global commitments to protect the rights of people with disabilities, discriminatory attitudes and social norms continue to disadvantage children with disabilities (CWD) in various ways. This manuscript examines the conceptualisation and measurement of discriminatory attitudes and social norms towards to CWD. A systematic review of the literature was conducted across three databases. Peer-reviewed or grey literature published between 2005 and 2016 in English was included. Quality assessment was conducted for 44 articles. Overall, 45% were assessed as low quality, 7% were assessed as high quality, 57% had an explicit conceptual framework, 52% did not outline any definitions, and 7% involved participants in the research. The most commonly used scales were the Chedoke-McMaster Attitudes towards Children with Handicaps Scale (9%), the Attitude Towards Disabled Person Scale (6.8%), and the Opinions Relative to Integration scale (6.8%). The results demonstrate a general lack of clear definitions, methodological rigour in selecting participants, and beneficiary involvement in programming and evaluation. More efforts are needed to define the psychometric properties of key constructs and the language describing attitudes in commonly used scales requires significant updating. Overall, there is little evidence regarding measurement of discriminatory social norms against CWD. Several best practices for future research are discussed.
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- 2022
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25. Environmental exposures are important for type 2 diabetes pathophysiology in sub-Saharan African populations
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Christensen, Dirk L., Hjort, Line, Mpagama, Stellah G., and Ramaiya, Kaushik L.
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- 2023
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26. Dataset of gallic acid quantification and their antioxidant and anti-inflammatory activities of different solvent extractions from Kacip Fatimah (Labisia pumila Benth. & Hook. f.) leaves
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Mohd Azrie Awang, Mohammad Amil Zulhilmi Benjamin, Adilah Anuar, Mohd Fakhrulddin Ismail, Shiamala Devi Ramaiya, and Siti Nur Aisyah Mohd Hashim
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Gallic acid ,Antioxidant ,Anti-inflammatory ,Labisia pumila ,Computer applications to medicine. Medical informatics ,R858-859.7 ,Science (General) ,Q1-390 - Abstract
The article presents data on the quantification of gallic acid (GA) and the assessment of the antioxidant and anti-inflammatory properties of Kacip Fatimah (Labisia pumila Benth. & Hook. f.) leaves using various solvents. GA was quantified using high-performance liquid chromatography analysis. Total phenolic content (TPC) was assessed using the Folin-Ciocalteu method. The antioxidant activities were evaluated using xanthine oxidase superoxide (XOD-Superoxide) and 2,2-diphenyl-1-picrylhydrazyl (DPPH) assays, while anti-inflammatory activities were examined through lipoxygenase (LOX) and xanthine oxidase (XOD) inhibition assays. Results showed that the water-extracted sample had the highest GA and TPC among the solvents tested, along with the strongest inhibition activities in the XOD-Superoxide and DPPH assays. Both water and ethanol extracts showed significant inhibitory activities in the LOX assay but were inactive in the XOD assay. These findings suggest that the bioactivity of L. pumila leaf extract is associated with GA and TPC. GA and TPC strongly correlated with antioxidant and anti-inflammatory activities, except for the XOD assay. The dataset highlights the potential dietary benefits of L. pumila leaves as a natural source of antioxidants and anti-inflammatory properties for pharmaceutical and nutraceutical applications.
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- 2023
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27. Competency of primary care providers to assess and manage suicide risk in Nepal: The role of emotional validation and invalidation techniques
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Megan Ramaiya, Connor McCabe, Anupa Gewali, Tsering Wangmo, Jane M. Simoni, Lori A. Zoellner, Shannon Dorsey, Stella Roth, and Brandon A. Kohrt
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suicide prevention ,Competency ,Primary care providers ,Validation ,Invalidation ,Nepal ,Mental healing ,RZ400-408 ,Public aspects of medicine ,RA1-1270 - Abstract
Screening for suicide risk in primary care settings is a recommended strategy worldwide for suicide prevention. However, few studies examine which clinical behaviors on the part of primary care providers are most predictive of competency in suicide risk assessment and management. The current study used ratings on the Enhancing Assessment of Common Therapeutic Factors (ENACT) tool during observations of provider-patient role plays (N = 91) to understand how primary care providers’ use of emotional validation and invalidation strategies associate with competency in assessing for and managing suicide risk. Structural equation modeling revealed that emotional validation by primary care providers (β = 0.63, p
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- 2023
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28. Assessing the health, social, educational and economic impact of the COVID-19 pandemic on adolescents in low- and middle-income countries: a rapid review of the literature
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Astha Ramaiya, Venkatraman Chandra-Mouli, Rosalijn Both, Ann Gottert, Silvia Guglielmi, Sam Beckwith, Mengmeng Li, and Robert W. Blum
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COVID-19 ,adolescents ,impact ,mental health ,education ,disparities ,Diseases of the genitourinary system. Urology ,RC870-923 ,The family. Marriage. Woman ,HQ1-2044 - Abstract
AbstractCOVID-19 has caused profound health, social, educational and economic devastation around the world, especially among the lives of adolescents in low- and middle-income countries. This paper looks at a wide array of outcomes impacting adolescents’ daily lives including health (mental, physical, sexual and reproductive health, vaccine perceptions and overlap between these topics), social relationships (family and peer), education and socio-economic disparities. Both scientific and grey literature between December 2019 and February 2022 were sought from PubMed, Google Scholar and organisations conducting research among adolescents, and coded. A total of 89 articles were included, 73% of which were peer-reviewed; 37% of the articles were from WHO’s Western Pacific region; 62% of the articles were cross-sectional; 75% were quantitative. Three major topics emerged in more than half the articles: mental health (72%), education (61%) and socio-economic ramifications (55%). However, there were regional differences in topics and many of them overlapped. The results indicate that, where there has been research, almost all findings have been linked to worse mental health during the pandemic. Overall, remote education was seen as a negative experience. The ramification of school closures on future aspirations, in particular early school leaving, highlights the importance of prioritising education during future pandemics based on the situation within the country. Gender and other disparities have made marginalised adolescents vulnerable to the economic ramifications of containment measures. Given the risks identified, there is a pressing need to put adolescents at the centre of establishing priorities for their health agenda for post-pandemic recovery.
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- 2023
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29. Session Key Based an Efficient Cryptographic Scheme of Images for Securing Internet of Things
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Vidwans, Abhinav and Ramaiya, Manoj
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- 2023
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30. Depression and anxiety among HIV-positive men who have sex with men and men who have sex with women in China
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Aunon, Frances M, Simoni, Jane M, Yang, Joyce P, Shiu, Chengshi, Chen, Wei-Ti, Edmunds, Sarah R, Ramaiya, Megan, Cheng, Joy, and Zhao, Hongxing
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Clinical and Health Psychology ,Public Health ,Health Sciences ,Human Society ,Psychology ,Basic Behavioral and Social Science ,Clinical Research ,Behavioral and Social Science ,Depression ,Infectious Diseases ,Mind and Body ,HIV/AIDS ,Mental Health ,Management of diseases and conditions ,2.3 Psychological ,social and economic factors ,Aetiology ,7.1 Individual care needs ,Good Health and Well Being ,Adaptation ,Psychological ,Anxiety ,Child ,China ,Cross-Sectional Studies ,Female ,HIV Infections ,Heterosexuality ,Homosexuality ,Male ,Humans ,Male ,Quality of Life ,Sexual Behavior ,Sexual and Gender Minorities ,HIV ,MSM ,depression ,anxiety ,coping ,Public Health and Health Services ,Public health ,Sociology ,Clinical and health psychology - Abstract
China is experiencing an emerging HIV epidemic among men who have sex with men (MSM). Minority stress theory posits that marginalized populations experience additional stress, which influences experiences of psychological distress and health outcomes. This study aimed to understand psychological distress of MSM relative to men who have sex with women (MSW) in an urban Chinese setting. Cross-sectional survey data were collected from 162 HIV-positive Chinese men receiving HIV treatment at Beijing's Ditan Hospital. Multiple linear regression with imputation was used to identify correlates of psychological distress. Relative to MSW, MSM were younger, more educated, and less likely to be in a relationship or have children. While both groups reported clinically elevated levels of depression and anxiety, sexual behavior was not associated with either outcome. Higher endorsement of depression symptomology was associated with worse reported physical health (β = -1.37, p
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- 2020
31. SOCIAL MEDIA SPAM DETECTION USING DIFFERENT TEXT FEATURE SELECTION TECHNIQUE AND MACHINE LEARNING
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Anubha Sharma and Manoj Ramaiya
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social media spam ,experimental analysis ,text feature selection ,classification ,Computer engineering. Computer hardware ,TK7885-7895 - Abstract
The messaging systems and social media is popular and has essential contributions to our social and professional life. Similarly, Spam is a part of the messaging system and social media. In social media, spam is found in various places (i.e. in posts, in comments, in reviews, and in chatting). Social media Spam is aimed to influence the user’s decision, point of view, and credibility of the service or brand. Therefore, social spam detection is essential. However, using the social media data a number of contributions are available in literature, but a fewer amount of work is available for social media spam detection. In this paper, we proposed a social media spam detection technique using machine learning and text feature extraction techniques. In this context first, a review on social media spam detection techniques has been carried out. Using this review, we extract the different machine learning techniques used, techniques of text feature selection, and experimental datasets used. In this review, we found that the spam messages with the URLs are more critical and harmful. Next step, we design a theoretical model for social media spam detection, which includes text feature selection techniques (i.e. TF-IDF, POS, and Information Gain) and their combinations (POS+TF-IDF and POS+IG). These features are used with Support Vector Machine (SVM), Artificial Neural Network, and Naïve Bayes classifier for training. Experimental analysis with dataset available in Kaggle we found that hybrid features is more effective for accurate classification as compared to individual features. Additionally, we found for classification the SVM and ANN are more accurate as compared to the Bayes classifier.
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- 2022
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32. A Family-Based Mental Health Navigator Intervention for Youth in the Child Welfare System: Protocol for a Randomized Controlled Trial
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Marina Tolou-Shams, Megan Ramaiya, Jannet Lara Salas, Ifunanya Ezimora, Martha Shumway, Jill Duerr Berrick, Adrian Aguilera, Brian Borsari, Emily Dauria, Naomi Friedling, Crystal Holmes, and Adam Grandi
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Medicine ,Computer applications to medicine. Medical informatics ,R858-859.7 - Abstract
BackgroundYouth in the child welfare system (child welfare–involved [CWI] youth) have high documented rates of mental health symptoms and experience significant disparities in mental health care services access and engagement. Adolescence is a developmental stage that confers increased likelihood of experiencing mental health symptoms and the emergence of disorders that can persist into adulthood. Despite a high documented need for evidence-based mental health services for CWI youth, coordination between child welfare and mental health service systems to increase access to care remains inadequate, and engagement in mental health services is low. Navigator models developed in the health care field to address challenges of service access, fragmentation, and continuity that affect the quality of care provide a promising approach to increase linkage to, and engagement in, mental health services for CWI youth. However, at present, there is no empirically supported mental health navigator model to address the unique and complex mental health needs of CWI youth and their families. ObjectiveUsing a randomized controlled trial, this study aims to develop and test a foster care family navigator (FCFN) model to improve mental health service outcomes for CWI adolescents (aged 12-17 years). MethodsThe navigator model leverages an in-person navigator and use of adjunctive digital health technology to engage with, and improve, care coordination, tracking, and monitoring of mental health service needs for CWI youth and families. In total, 80 caregiver-youth dyads will be randomized to receive either the FCFN intervention or standard of care (clinical case management services): 40 (50%) to FCFN and 40 (50%) to control. Qualitative exit interviews will inform the feasibility and acceptability of the services received during the 6-month period. The primary trial outcomes are mental health treatment initiation and engagement. Other pre- and postservice outcomes, such as proportion screened and time to screening, will also be evaluated. We hypothesize that youth receiving the FCFN intervention will have higher rates of mental health treatment initiation and engagement than youth receiving standard of care. ResultsWe propose enrollment of 80 dyads by March 2024, final data collection by September 2024, and the publication of main findings in March 2025. After final data analysis and writing of the results, the resulting manuscripts will be submitted to journals for dissemination. ConclusionsThis study will be the first to produce empirically driven conclusions and recommendations for implementing a family mental health navigation model for CWI youth with long-standing and unaddressed disparities in behavioral health services access. The study findings have potential to have large-scale trial applicability and be feasible and acceptable for eventual system implementation and adoption. Trial RegistrationClinicalTrials.gov NCT04506437; https://www.clinicaltrials.gov/study/NCT04506437 International Registered Report Identifier (IRRID)DERR1-10.2196/49999
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- 2023
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33. Nutritional values of wild edible freshwater macrophytes
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Muta Harah Zakaria, Shiamala Devi Ramaiya, Nordiah Bidin, Nurul Nur Farahin Syed, and Japar Sidik Bujang
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Freshwater macrophytes ,Nutrients ,Proximate analysis ,Wild plants ,Mineral content ,Medicine ,Biology (General) ,QH301-705.5 - Abstract
Background The social acceptability of wild freshwater macrophytes as locally consumed vegetables is widespread. Freshwater macrophytes have several uses; for example, they can be used as food for humans. This study determined the proximate composition and mineral content of three freshwater macrophyte species, i.e., Eichhornia crassipes, Limnocharis flava, and Neptunia oleracea. Methods Young shoots of E. crassipes, L. flava, and N. oleracea were collected from shallow channels of Puchong (3°00′11.89″N, 101°42′43.12″E), Ladang 10, Universiti Putra Malaysia (2°58′44.41″N, 101°42′44.45″E), and Kampung Alur Selibong, Langgar (06°5′50.9″N, 100°26′49.8″E), Kedah, Peninsular Malaysia. The nutritional values of these macrophytes were analysed by using a standard protocol from the Association of Official Analytical Chemists. Eight replicates of E. crassipes and L. flava and four replicates of N. oleracea were used for the subsequent analyses. Results In the proximate analysis, N. oleracea possessed the highest percentage of crude protein (29.61%) and energy content (4,269.65 cal g−1), whereas L. flava had the highest percentage of crude fat (5.75%) and ash (18.31%). The proximate composition trend for each species was different; specifically, all of the species possessed more carbohydrates and fewer crude lipids. All of the species demonstrated a similar mineral trend, with high nitrogen and potassium and lower copper contents. Nitrogen and potassium levels ranged from 12,380–40,380 mg kg−1 and from 11,212-33,276 mg kg−1, respectively, and copper levels ranged from 16–27 mg kg−1. The results showed that all three plant species, i.e., E. crassipes, N. oleracea, and L. flava are plant-based sources of macro- and micronutrient beneficial supplements for human consumption.
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- 2023
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34. National Non-Communicable Diseases Conferences- A Platform to Inform Policies and Practices in Tanzania
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Davis E. Amani, Harrieth P. Ndumwa, Jackline E. Ngowi, Belinda J. Njiro, Castory Munishi, Erick A. Mboya, Doreen Mloka, Amani I. Kikula, Emmanuel Balandya, Paschal Ruggajo, Anna T. Kessy, Emilia Kitambala, James T. Kengia, James Kiologwe, Omary Ubuguyu, Bakari Salum, Appolinary Kamuhabwa, Kaushik Ramaiya, Bruno F. Sunguya, and Ntuli Kapologwe
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non-communicable diseases (ncds) ,ncds conferences ,ncds policies ,tanzania ,Infectious and parasitic diseases ,RC109-216 ,Public aspects of medicine ,RA1-1270 - Abstract
Background: Non-communicable diseases (NCDs) arise from diverse risk factors with differences in the contexts and variabilities in regions and countries. Addressing such a complex challenge requires local evidence. Tanzania has been convening stakeholders every year to disseminate and discuss scientific evidence, policies, and implementation gaps, to inform policy makers in NCDs responses. This paper documents these dissemination efforts and how they have influenced NCDs response and landscape in Tanzania and the region. Methods: Desk review was conducted through available MOH and conference organizers’ documents. It had both quantitative and qualitative data. The review included reports of the four NCDs conferences, conference organization, and conduct processes. In addition, themes of the conferences, submitted abstracts, and presentations were reviewed. Narrative synthesis was conducted to address the objectives. Recommendations emanated from the conference and policy uptake were reviewed and discussed to determine the impact of the dissemination. Findings: Since 2019, four theme-specific conferences were organized. This report includes evidence from four conferences. The conferences convened researchers and scientists from research and training institutions, implementers, government agencies, and legislators in Tanzania and other countries within and outside Africa. Four hundred and thirty-five abstracts were presented covering 14 sub-themes on health system improvements, financing, governance, prevention intervention, and the role of innovation and technology. The conferences have had a positive effect on governments’ response to NCDs, including health care financing, NCDs research agenda, and universal health coverage. Conclusion: The National NCDs conferences have provided suitable platforms where stakeholders can share, discuss, and recommend vital strategies for addressing the burden of NCDs through informing policies and practices. Ensuring the engagement of the right stakeholders, as well as the uptake and utilization of the recommendations from these platforms, remains crucial for addressing the observed epidemiological transition in Tanzania and other countries with similar contexts.
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- 2024
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35. Micro-particle injection experiments in ADITYA-U tokamak using an inductively driven pellet injector
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Sambaran Pahari, Rahulnath P.P., Aditya Nandan Savita, Pradeep Kumar Maurya, Saroj Kumar Jha, Neeraj Shiv, Raghavendra K., Harsh Hemani, Belli Nagaraju, Sukantam Mahar, Manmadha Rao, I.V.V. Suryaprasad, U.D. Malshe, J. Ghosh, B.R. Doshi, Prabal Kumar Chattopadhyay, R.L. Tanna, K.A. Jadeja, K.M. Patel, Rohit Kumar, Tanmay Macwan, Harshita Raj, S. Aich, Kaushlender Singh, Suman Dolui, D. Kumawat, M.N. Makwana, K.S. Shah, Shivam Gupta, V. Balakrishnan, C.N. Gupta, Swadesh Kumar Patnaik, Praveenlal Edappala, Minsha Shah, Bhavesh Kadia, Nandini Yadava, Kajal Shah, G. Shukla, M.B. Chowdhuri, R. Manchanda, Nilam Ramaiya, Manoj Kumar, Umesh Nagora, Varsha S., S.K. Pathak, Kumudni Asudani, Paritosh Chaudhuri, P.N. Maya, Rajiv Goswami, A. Sen, Y.C. Saxena, R. Pal, and S. Chaturvedi
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pellet injector ,fusion ,disruption mitigation ,electromagnetic launcher ,ITER ,Nuclear and particle physics. Atomic energy. Radioactivity ,QC770-798 - Abstract
A first-of-its-kind, inductively driven micro-particle (Pellet) accelerator and injector have been developed and operated successfully in ADITYA-U circular plasma operations, which may ably address the critical need for a suitable disruption control mechanism in ITER and future tokamak. The device combines the principles of electromagnetic induction, pulse power technology, impact, and fracture dynamics. It is designed to operate in a variety of environments, including atmospheric pressure and ultra-high vacuum. It can also accommodate a wide range of pellet quantities, sizes, and materials and can adjust the pellets’ velocities over a coarse and fine range. The device has a modular design such that the maximum velocity can be increased by increasing the number of modules. A cluster of lithium titanate/carbonate (Li _2 TiO _3 /Li _2 CO _3 ) impurity particles with variable particle sizes, weighing ∼50–200 mg are injected with velocities of the order of ∼200 m s ^−1 during the current plateau in ADITYA-U tokamak. This leads to a complete collapse of the plasma current within ∼5–6 ms of triggering the injector. The current quench time is dependent on the amount of impurity injected as well as the compound, with Li _2 TiO _3 injection causing a faster current quench than Li _2 CO _3 injection, as more power is radiated in the case of Li _2 TiO _3 . The increase in radiation due to the macro-particle injection starts in the plasma core, while the soft x-ray emission indicates that the entire plasma core collapses at once.
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- 2024
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36. Overview of physics results from the ADITYA-U tokamak and future experiments
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R.L. Tanna, J. Ghosh, K.A. Jadeja, Rohit Kumar, Suman Aich, K.M. Patel, Harshita Raj, Kaushlender Singh, Suman Dolui, Kajal Shah, S. Patel, Nandini Yadava, Tanmay Macwan, A. Kanik, Ankit Kumar, Bharat Hegde, Ashok Kumawat, A. Kundu, R. Joshi, Deepti Sharma, Ankit Patel, L. Pradhan, K. Galodiya, Shwetang Pandya, Soumitra Banerjee, Sk Injamul Hoque, Komal, M.B. Chowdhuri, R. Manchanda, N. Ramaiya, Ritu Dey, G. Shukla, D. Modi, Vishal Sharma, Aman Gauttam, M.N. Makwana, Kunal Shah, S. Gupta, Supriya Nair, S. Purohit, U.C. Nagora, A. Adhiya, Kiran Patel, Kumudni Asudani, S.K. Jha, D. Kumawat, Santosh Pandya, Varsha S., Praveenlal Edappala, B. Arambhadiya, Minsha Shah, Pramila Gautam, V. Raulji, Praveena Shukla, Abhijeet Kumar, Mitesh Patel, R. Rajpal, M. Bhandarkar, Imran Mansuri, Kirti Mahajan, K. Mishra, Sunil Kumar, B.K. Shukla, Jagabandhu Kumar, P.K. Sharma, Snehlata Aggarwal, Kumar Ajay, M.K. Gupta, S.K. Pathak, P.K. Chattopadhyay, D. Raju, S. Dutta, S. Pahari, N. Bisai, Chetna Chauhan, Y.C. Saxena, A. Sen, R. Pal, and S. Chaturvedi
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fusion ,tokamak ,plasma ,magnetic confinement ,experiments ,Nuclear and particle physics. Atomic energy. Radioactivity ,QC770-798 - Abstract
The ADITYA upgrade (ADITYA-U), a medium-sized $\left( {{R_0} = 75{\text{ cm}},\,\,a = 25{\text{ cm}}} \right)$ conventional tokamak facility in India, has been consistently producing experiments findings by using circular and shaped-plasmas. Recognizing the plasma parameters aligning closely with the design parameters of circular limited plasmas, ADITYA-U shifted its focus toward exploring the operational regime for experimentation on saw-tooth and MHD phenomena. Moreover, ADITYA-U has made consistent advancements toward conducting preliminary plasma shaping experiments through the activation of top and bottom divertor coils utilizing hydrogen as well as deuterium fuels. Confinement is improved by a factor of ∼1.5 in ${D_2}$ plasmas when compared to H _2 plasmas of ADITYA-U. Further, ADITYA-U operations emphasize preventing disruptions and runaway electrons (REs) to ensure safe operations for future fusion devices. Significant suppression of REs has been achieved in ADITYA-U with the application of pulsed localized vertical magnetic field (LVF) perturbation, thereby establishing the technique’s independence from the tokamak device. The successful RE mitigation requires a critical threshold of LVF pulse magnitude, which is approximately 1% of the toroidal magnetic field, and a minimum duration of ∼5 ms. Apart from this, several novel findings have been achieved in the ADITYA-U experiments, including the modification of sawtooth duration through gas-puff, the emergence of MHD-induced geodesic acoustic mode-like oscillations, the propagation of fast heat pulses induced by MHD activity, the control of RE dynamics through Gas-puffs, the propagation of pinch-driven cold-pulses, the transport and core accumulations of argon impurities, the mass dependency of plasma toroidal rotation and the detection of ‘RICE’ scaling, as well as the characterization of edge plasma using wall conditioning methods, such as glow discharge cleaning using a combination of Ar -H _2 mixture, localized wall cleaning by electron cyclotron resonant plasma, and the development of machine learning-based disruption predictions, will be discussed in this paper.
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- 2024
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37. The effect of impurity seeding on edge toroidal rotation in the ADITYA-U tokamak
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Ankit Kumar, K. Shah, M.B. Chowdhuri, N. Ramaiya, Aman Gauttam, K.A. Jadeja, Bharat Hedge, N. Yadava, Kaushlender Singh, Suman Dolui, Tanmay Macwan, Ashok Kumawat, Pramila Gautam, Laxmikanta Pradhan, Harshita Raj, G. Shukla, Dipexa Modi, S. Patel, Soumitra Banerjee, Injamul Hoque, Komal, Suman Aich, Ankit Patel, Utsav, A. Kanik, Rohit Kumar, Priyanka Verma, K.M. Patel, Kalpesh Galodiya, M. Shah, R.L. Tanna, and Joydeep Ghosh
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toroidal rotation ,rotation reversal ,impurity seeding ,Nuclear and particle physics. Atomic energy. Radioactivity ,QC770-798 - Abstract
Intrinsic toroidal rotation velocity ( V _φ ) has been measured from the Doppler shift of C ^5+ carbon spectral lines (at 529.05 nm) in the edge region of the ADITYA-U tokamak without any auxiliary torque input in an ohmically heated pure hydrogen (H _2 ) plasma as well as in H _2 plasmas seeded with medium-Z (neon and argon) impurities . The toroidal rotation in the edge region is observed to reverse its direction from the counter-current to the co-current direction with an increase in plasma current beyond I _p ∼ 145–150 kA. Furthermore, a systematic decrease in the co-current V _φ has been observed with the edge density, which tends to decrease to almost zero velocity with an increase in the edge density. The injection of medium- Z (neon and argon) impurities is observed to influence the edge toroidal rotation significantly. In low I _p discharges, argon injection leads to a reversal of edge intrinsic rotation from the counter-current to the co-current direction. In high I _p discharges, both neon and argon seeding enhance the co-current rotation by about ∼5–10 km s ^−1 , at a constant I _p compared to pure H _2 discharges. Simultaneous measurements of the edge radial electric field, E _r , shows that the E _r × B _θ flow seems to be driving the edge toroidal rotation in ADITYA-U. With impurity injection, the E _r also gets modified, leading to an observed increase in the edge toroidal rotation.
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- 2024
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38. Plasma performance enhancement and impurity control using a novel technique of argon–hydrogen mixture fueled glow discharge wall conditioning in the ADITYA-U tokamak
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K.A. Jadeja, J. Ghosh, K.M. Patel, A.B. Patel, R.L. Tanna, Kiran Patel, B.G. Arambhadiya, K.D. Galodiya, Rohit Kumar, S. Aich, Harshita Raj, L. Pradhan, M.B. Chowdhuri, R. Manchanda, N. Ramaiya, Nandini Yadava, Sharvil Patel, Kajal Shah, Dipexa Modi, A. Gauttam, K. Singh, S. Dolui, Ankit Kumar, B. Hegde, A. Kumawat, Minsha Shah, R. Rajpal, U. Nagora, P.K. Atrey, S.K. Pathak, Shishir Purohit, A. Adhiya, Manoj Kumar, Kumudni Assudani, D. Kumavat, S.K. Jha, K.S. Shah, M.N. Makwana, Shivam Gupta, Supriya Nair, Kishore Mishra, D. Raju, P.K. Chattopadhyay, and B.R. Kataria
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tokamak ,wall conditioning ,plasma wall interaction ,Nuclear and particle physics. Atomic energy. Radioactivity ,QC770-798 - Abstract
Effective control of impurities and precise regulation of the fueling gas are supreme prerequisites for optimal operation in any fusion device. Conventional wall-conditioning methods fall short of achieving optimal wall conditioning. Conventional wall-conditioning methods, such as vessel baking and H _2 /(D _2 )-fueled glow discharge cleaning (GDC), are generally required to remove wall-absorbed impurities in bulk after vessel venting. The excess amount of hydrogen, injected during H _2 GDC, can be reduced by helium (He)-fueled GDC. However, He removal from the vessel is more challenging due to its low molecular mass, very low condensation temperature, and inert characteristics. In ADITYA-U, optimal wall conditioning cannot be achieved using H _2 followed by He-fueled GDC when applied for extended periods spanning hours or days. A GDC with a mixture of argon and hydrogen (Ar–H _2 ) is introduced in the ADITYA-U tokamak to obtain better wall conditioning than H _2 followed by He GDC. In Ar–H _2 GDC, long-lived ArH ^+ ions are formed in sufficient numbers and accelerated toward the vessel wall with high momentum. This results in the breaking of high energy bonds of impurities with the wall/plasma facing components, which is not possible by H ^+ , H _2 ^+, H _3 ^+ ions in H _2 GDC due to their lower momentum. An optimal blend ratio of Ar to H _2 is established at 15%–20% for the mixture. This composition ensures that the introduction of high- Z Ar does not adversely affect tokamak plasma operations. The C- and O-containing impurities are reduced beyond the limit of the prolonged operation of H _2 GDC. Relative low pressures of dominant impurities such as CO, CH _4 , and H _2 O are obtained due to the Ar–H _2 GDC compared to routinely operated H _2 GDC. A comparison study of H _2 GDC and the developed Ar–H _2 GDC is performed in terms of wall conditioning and tokamak plasma operation. The encouraging results of the Ar–H _2 GDC are obtained in both wall cleaning and tokamak operation scenarios in the midsize tokamak ADITYA-U. This development and application of Ar–H _2 GDC are beneficial for large-sized fusion devices, leading to improved impurity reduction, reduced operational fuel consumption (H _2 /D _2 /He), and enhanced control over fuel recycling/extraction.
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- 2024
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39. Enhancing the value of radiology reports: a primer for residents
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Petraszko, Andrew, Chagarlamudi, Kaushik, and Ramaiya, Nikhil
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- 2022
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40. The complete chloroplast genome sequence of Durio oxleyanus (Malvaceae) and its phylogenetic position
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Xue Jing Wong, Douglas Law, Zheng-Feng Wang, Shiamala Devi Ramaiya, and Shiou Yih Lee
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durian ,durioneae ,genomic resource ,next-generation sequencing ,phylogenomics ,Genetics ,QH426-470 - Abstract
Durio oxleyanus (Griff) of Malvaceae is considered a natural heritage by the countries that produce it, including Peninsular Malaysia, Sumatra, and Borneo. Even though the species is regarded as a commercially valuable fruit, cultivation of this species is uncommon. The dwindling population of this species in the wild has put its survival in jeopardy. Conservation efforts are required for this species, which are limited. In this study, the complete chloroplast (cp) genome of D. oxleyanus was assembled and characterized as a genomic resource for conservation programs. The complete cp genome size was 164,831 bp in length, with a pair of inverted repeats of 23,782 bp each, separating the 96,446-bp large and the 20,823-bp small single copies. A total of 135 genes were predicted, which consisted of 90 protein-coding, 37 tRNA, and eight rRNA genes. The overall GC content was 35.8%. The phylogenetic analysis based on the maximum-likelihood and Bayesian inference methods revealed that D. oxleyanus is closely related to D. zibethinus. The genomic data obtained will be useful for future studies of Malvaceae’s phylogenetics and evolution.
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- 2022
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41. Skeletal muscle fibre type and enzymatic activity in adult offspring following placental and peripheral malaria exposure in foetal life
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Dirk L. Christensen, Theonest K. Mutabingwa, Ib C. Bygbjerg, Allan A. Vaag, Louise G. Grunnet, Fanny Lajeunesse-Trempe, Jannie Nielsen, Christentze Schmiegelow, Kaushik L. Ramaiya, and Kathryn H. Myburgh
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malaria exposure ,hypoxia ,myosin heavy chain ,skeletal muscle enzymes ,glucose metabolism ,Public aspects of medicine ,RA1-1270 - Abstract
BackgroundMaternal malaria may restrict foetal growth. Impaired utero-placental blood flow due to malaria infection may cause hypoxia-induced altered skeletal muscle fibre type distribution in the offspring, which may contribute to insulin resistance and impaired glucose metabolism. This study assessed muscle fibre distribution 20 years after placental and/or peripheral in-utero malaria exposure compared to no exposure, i.e., PPM+, PM+, and M-, respectively.MethodsWe traced 101 men and women offspring of mothers who participated in a malaria chemosuppression study in Muheza, Tanzania. Of 76 eligible participants, 50 individuals (29 men and 21 women) had skeletal muscle biopsy taken from m. vastus lateralis in the right leg. As previously reported, fasting and 30 min post-oral glucose challenge plasma glucose values were higher, and insulin secretion disposition index was lower, in the PPM+ group. Aerobic capacity (fitness) was estimated by an indirect VO2max test on a stationary bicycle. Muscle fibre sub-type (myosin heavy chain, MHC) distribution was analysed, as were muscle enzyme activities (citrate synthase (CS), 3-hydroxyacyl-CoA dehydrogenase, myophosphorylase, phosphofructokinase, lactate dehydrogenase, and creatine kinase activities. Between-group analyses were adjusted for MHC-I %.ResultsNo differences in aerobic capacity were found between groups. Despite subtle elevations of plasma glucose levels in the PPM+ group, there was no difference in MHC sub-types or muscle enzymatic activities between the malaria-exposed and non-exposed groups.ConclusionThe current study did not show differences in MHC towards glycolytic sub-types or enzymatic activity across the sub-groups. The results support the notion of the mild elevations of plasma glucose levels in people exposed to placental malaria in pregnancy being due to compromised pancreatic insulin secretion rather than insulin resistance.
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- 2023
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42. Anorectal pathology in the HIV population: a guide for radiologists
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Vos, Derek, Wang, Margaret, Ramaiya, Sita, Kikano, Elias G., Tirumani, Sree H., and Smith, Daniel A.
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- 2022
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43. Type 2 diabetes mellitus in sub-Saharan Africa: challenges and opportunities
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Motala, Ayesha A., Mbanya, Jean Claude, Ramaiya, Kaushik, Pirie, Fraser J., and Ekoru, Kenneth
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- 2022
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44. Rewinding the Clock: Preparing the Next Generation of Radiology Residents for Oral Boards.
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Sheng, Max, Ritchie, Brandon, Ramaiya, Nikhil, and Mohamed, Inas
- Abstract
The replacement of the ABR in-person oral examination with the DR certifying examination affected approximately 15,000 radiologists, spanning from 2013 to 2027. This decision was motivated by better aligning with the timing of other American Board of Medical Specialty (ABMS) members, more closely reflecting real-world practice of radiology and narrowing training geared towards the trainee's subspecialty preference. However, in retrospect, this change may have subtracted from the quality and value of diagnostic radiology training as a whole with the de-emphasis on competence in general radiology, communication skills, and cognitive reasoning. In this paper, the authors lay out a blueprint necessary in order to rewind the clock of how diagnostic radiology programs can prepare their trainees for the new DR oral examination. Such a change will require substantial redactions affecting all designations, including radiology faculty, education teams, departmental leadership, academic institutions, ACGME, and ABR. The authors believe that implementing these modifications will not only effectively equip radiology candidates for the new DR oral examination but will also augment the significance of radiologists as indispensable members of multidisciplinary teams. The authors also outline the challenges that could emerge from these changes and speculate on the anticipated role of AI in future oral board examinations. [ABSTRACT FROM AUTHOR]
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- 2024
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45. Non-communicable Diseases Week: Best Practices in Addressing the NCDs Burden from Tanzania
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Belinda J. Njiro, Jackline E. Ngowi, Harrieth P. Ndumwa, Davis Amani, Castory Munishi, Doreen Mloka, Emmanuel Balandya, Paschal Rugajo, Anna T. Kessy, Omary Ubuguyu, Bakari Salum, Appolinary Kamuhabwa, Kaushik Ramaiya, Bruno F. Sunguya, Erick A. Mboya, Amani I Kikula, Emilia Kitambala, James Kiologwe, James T. Kengia, and Ntuli Kapologwe
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non-communicable diseases (ncds) ,ncds week ,ncds advocacy ,tanzania ,Infectious and parasitic diseases ,RC109-216 ,Public aspects of medicine ,RA1-1270 - Abstract
Background: Five million people die every year from non-communicable diseases (NCDs) globally. In Tanzania, more than two-thirds of deaths are NCD-related. The country is investing in preventive and advocacy activities as well as interventions to reduce the burden. Of particular interest, the Ministry of Health (MoH) commemorates NCDs’ week using a multisectoral and multi-stakeholders’ approach. This paper highlights activities conducted during NCDs week with the aim of sharing lessons for other countries with similar context and burdens. Methods: A thorough review of official reports and the national strategic plans for NCDs was done including the 2020 and 2021 National NCDs’ week reports, the National Strategic Plan for NCDs 2015–2020, and the National NCDs agenda. Findings: NCDs week is commemorated annually throughout the country involving the five key activities. First, community awareness and participation are encouraged through media engagement and community-based preventive and advocacy activities. Second, physical activities and sports festivals are implemented with a focus on developing and renovating infrastructures for sports and recreation. Third, health education is provided in schools to promote healthy behaviors for secondary school adolescents in transition to adulthood. Fourth, health service provision and exhibitions are conducted involving screening for hypertension, diabetes, obesity, alcohol use, and physical activities. The targeted screening of NCDs identified 10% of individuals with at least one NCD in 2020. In 2021, a third of all screened individuals were newly diagnosed with hypertension, and 3% were found to have raised blood glucose levels. Fifth, the national NCDs scientific conferences conducted within the NCDs week provide an avenue for stakeholders to discuss scientific evidence related to NCDs and recommend strategies to mitigate NCDs burden. Conclusion: The initiation of NCDs week has been a cornerstone in advocating for NCDs control and prevention in the country. It has created awareness on NCDs, encourage healthy lifestyles and regular screening for NCDs. The multi-stakeholder and multi-sectoral approaches have made the implementation of the mentioned activities feasible and impactful. This has set an example for the united efforts toward NCD control and prevention at national, regional, and global platforms while considering contextual factors during adoption and implementation.
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- 2023
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46. Mitigating the Rising Burden of Non-Communicable Diseases through Locally Generated Evidence-Lessons from Tanzania
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Harrieth P. Ndumwa, Davis E. Amani, Jackline E. Ngowi, Belinda J. Njiro, Castory Munishi, Erick A. Mboya, Doreen Mloka, Amani I. Kikula, Emmanuel Balandya, Paschal Ruggajo, Anna T. Kessy, Emilia Kitambala, Ntuli Kapologwe, James T. Kengia, James Kiologwe, Omary Ubuguyu, Bakari Salum, Appolinary Kamuhabwa, Kaushik Ramaiya, and Bruno F. Sunguya
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non-communicable diseases (ncds) ,epidemiological transition ,advocacy ,multi-stakeholders ,tanzania ,Infectious and parasitic diseases ,RC109-216 ,Public aspects of medicine ,RA1-1270 - Abstract
Background: The burden of Non-Communicable Diseases (NCDs) is rapidly increasing globally, and low- and middle-income countries (LMICs) bear the brunt of it. Tanzania is no exception. Addressing the rising burden of NCDs in this context calls for renewed efforts and commitment by various stakeholders. This paper highlights local initiatives and strategies to combat NCDs in Tanzania and provides lessons for countries with similar contexts. Methods: We reviewed published and grey literature and conducted policy analysis on NCDs in Tanzania to examine the burden of NCDs and the national response addressing it. The documents included National NCD strategic plans, NCD research agenda, and reports from the World Diabetes Foundation and the World Health Organization. Moreover, a scoping review of ongoing NCD activities and programs in other countries was also conducted to supplement the evidence gathered. Results: The rising burden of NCDs as a result of the epidemiological transition in Tanzania called for the launching of a dedicated National NCD Control and Prevention Program. The Ministry of Health collaborates with local, national, and international partners on NCD prevention and curative strategies. This led to the development of important guidelines and policies on NCDs, including strengthening the capacity of health facilities and healthcare workers, increased community engagement and awareness of NCDs, and increased advocacy for more resources in NCD initiatives. Strong governmental commitment has been vital; this is demonstrated by a renewed commitment to the fight through national NCD week and related advocacy activities conducted annually. To ensure multi-stakeholders’ engagement and political commitment, all these activities are coordinated at the Prime Minister’s office and provide strong lessons for countries with contexts similar to Tanzania. Conclusion: Multi-stakeholders’ engagement, innovative approaches, and coordinated governmental efforts to address NCDs have shone a light on addressing the burden of NCDs and may be sustainable if aligned with locally available resources. Such initiatives are recommended for adoption by other nations to address the burdens of NCDs.
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- 2023
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47. Efforts to Address the Burden of Non-Communicable Diseases Need Local Evidence and Shared Lessons from High-Burden Countries
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Jackline E. Ngowi, Castory Munishi, Harrieth P. Ndumwa, Belinda J. Njiro, Davis E. Amani, Erick A. Mboya, Doreen Mloka, Amani I. Kikula, Emmanuel Balandya, Paschal Ruggajo, Anna T. Kessy, Emilia Kitambala, Ntuli Kapologwe, James T. Kengia, James Kiologwe, Omary Ubuguyu, Bakari Salum, Appolinary Kamuhabwa, Kaushik Ramaiya, and Bruno F. Sunguya
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non-communicable diseases (ncds) ,epidemiological transition ,advocacy ,tanzania ,Infectious and parasitic diseases ,RC109-216 ,Public aspects of medicine ,RA1-1270 - Published
- 2023
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48. Author Correction: Role of pinch in Argon impurity transport in ohmic discharges of Aditya-U Tokamak
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K. Shah, J. Ghosh, S. Patel, M. B. Chowdhuri, K. A. Jadeja, G. Shukla, T. Macwan, A. Kumar, S. Dolui, K. Singh, R. L. Tanna, K. M. Patel, R. Dey, R. Manchanda, N. Ramaiya, R. Kumar, S. Aich, N. Yadava, S. Purohit, M. K. Gupta, U. C. Nagora, S. K. Pathak, P. K. Atrey, and K. B. K. Mayya
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Medicine ,Science - Published
- 2023
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49. The modern therapeutic & imaging landscape of metastatic prostate cancer: a primer for radiologists
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Yoon, Justin G., Mohamed, Inas, Smith, Daniel A., Tirumani, Sree H., Paspulati, Raj M., Mendiratta, Prateek, and Ramaiya, Nikhil H.
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- 2022
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50. Clinical-demographic markers for improving diabetes mellitus diagnosis in people with tuberculosis in Tanzania
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Kenneth Cleophace Byashalira, Nyasatu Godfrey Chamba, Yosra Alkabab, Peter Masunga Mbelele, Nyanda Elias Ntinginya, Kaushik Laxmidas Ramaiya, Mohamed Zahir Alimohamed, Scott Kirkland Heysell, Blandina Theophil Mmbaga, Ib Christian Bygbjerg, Dirk Lund Christensen, Stellah George Mpagama, Troels Lillebaek, and ADEPT Consortium
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Implementation ,DM screening ,TB patients ,Clinical-demographic ,Tanzania ,Infectious and parasitic diseases ,RC109-216 - Abstract
Abstract Background Tuberculosis (TB) control is threatened by an increasing prevalence of diabetes mellitus (DM), particularly in endemic countries. Screening for DM is not routinely implemented in Tanzania; therefore, we aimed to screen for DM at TB diagnosis using clinical-demographic markers. Methods Our cross-sectional study recruited TB patients who received anti-TB treatment between October 2019 and September 2020 at health care facilities in three regions from Tanzania. Patients were screened for DM using DM symptoms (polydipsia, polyphagia and polyuria) and random blood glucose (RBG) testing. Patients with a history of DM and those with no history of DM but an RBG ≥ 7.8 mmol/L had point-of-care glycated haemoglobin (HbA1c) testing, and were considered to have DM if HbA1c was ≥ 48 mmol/mol. Results Of 1344 TB patients, the mean age was 41.0 (± 17.0) years, and 64.7% were male. A total of 1011 (75.2%) had pulmonary TB, and 133 (10.4%) had at least one DM symptom. Overall, the prevalence of DM was 7.8%, of which 36 (2.8%) TB patients with no history of DM were newly diagnosed with DM by RBG testing. TB/DM patients were older than those with only TB (50.0 ± 14.0 years vs 40.0 ± 17.0 years, p
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- 2022
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