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Detecting Pipeline Anomalies and Variations in Acoustic Velocity in Multiphase Flow Regimes Using Computational Fluid Dynamics

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Open Journal of Fluid Dynamics 2020年第3期10卷 184-197页

作者： Amod kumar Claudio Olmi Oluwatosin Ogundare pranab Jha David Bennett Halliburton Energy Services Inc. Houston TX USA

The use of hydrodynamic pressure wave generated from the action of a fast acting valve as well as acoustic reflectometry in the detection of anomalies like leaks, deposits and blockages in a pipe or fluid flow system in the context of the prevailing scientific theories in fluid flow is discussed. The focus of this paper is the application of the theories to more complex scenarios involving multi-phase fluid flow, specifically, two-phase and two-component fluid flow. The principal concern is the determination of acoustic velocity in a two-phase flow regime;which is problematic because it varies with mixture composition along multiphase flowlines. A technique for simulating flow regimes in the laboratory using stacked S-shaped pipes is presented as well as a discussion of the results from a computational fluid dynamics model.

关键词： Multiphase Flow Acoustic Reflectometry Pipeline Anomaly Acoustic Velocity

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The Effects of Omega-3 Fatty Acids Supplementation in Bronchial Asthma

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Journal of Biosciences and Medicines 2023年第4期11卷 208-219页

作者： Uttam kumar Barua pranab Karmaker Arup kumar Saha Md. Merazul Mostofa Dilip kumar Ghosh Kamal Krishna Biswas Department of Respiratory Medicine Shaheed Suhrawardy Medical College Hospital Dhaka Bangladesh Bangladesh Reference Institute for Chemical Measurements (BRiCM) Dhaka Bangladesh Department of Dental Public Health City Dental College and Hospital Dhaka Bangladesh Department of Genetic Engineering and Biotechnology University of Rajshahi Rajshahi Bangladesh Department of Gastroenterology Shaheed Suhrawardy Medical College Hospital Dhaka Bangladesh Department of Biochemistry and Molecular Biology University of Rajshahi Rajshahi Bangladesh

Bronchial asthma is a chronic inflammatory disease. Allergies are intensely related to bronchial asthma and to other respiratory diseases such as chronic sinusitis, middle ear infections, and nasal polyps. Treatment can vary from inhalers to oral medications to drugs delivered in a nebulizer or breathing machine. Besides, dietary involvement was a significant tool to reduce the severity of many chronic inflammatory diseases including asthma. Randomly assigned, double blind, and placebo controlled 290 adults with mild to moderately persistent bronchial asthma concluded in this study, were subjected to alternating phases of supplementation with omega-3 fatty acids, vitamin C and Zn either singly or in combination. Subjective symptom improvement, pulmonary function, and biochemical tests were carried out at the beginning of the study and at the end of each therapeutic phase. The study findings showed that nearly half of the cases were in age between 18 years to 40 years followed by 29.6 of the cases that fall in age range between 40 years and 60 years. It was clear that all the four supplements (ogema-3 fatty acids, vitamin C and Zn, and combination) contributed more than placebo in reducing the severity of bronchial asthma. However, omega 3 fatty acids and combined supplement significantly contributed in symptomatic improvement (p < 0.05). There was a significant improvement of pulmonary function and sputum inflammatory markers with diet supplementation (p < 0.05). So, the subjects with mild and moderately persistent bronchial asthma may get benefit from their dietary supplementation with omega 3 fatty acids, Zinc and vitamin C. It is evident from this study that omega 3 fatty acids and combined supplementation significantly improved the severity of bronchial asthma.

关键词： Bronchial Asthma FEV1 FVC Omega 3 Fatty Acids

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Management of Sepsis in Intensive Care Units in Rajshahi Medical College, Bangladesh

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Advances in Infectious Diseases 2020年第1期10卷 11-25页

作者： Abu Hena Mostafa Kamal pranab Karmaker Wahida Khatun Arup kumar Saha Md. Latifur Rahman Parvez Hassan ICU Rajshahi Medical College Hospital Rajshahi Bangladesh Institute of Biological Sciences University of Rajshahi Rajshahi Bangladesh City Dental College Dhaka Bangladesh Islami Bank Medical College and Hospital Rajshahi Bangladesh

Background: Sepsis was a life-threatening situation affecting roughly 27 million individuals globally every year. Devoid of proper management, sepsis could develop to austere sepsis and septic shock that reason certain eight million expiries every year. Initial identification and analysis of contaminations and quick introductions of antimicrobial management had long been predictable as essential principles of treatment. Methods: All patients were evaluated thoroughly by history, clinical and laboratory findings. Serum lactate levels were collected at 0 hr and 24 hrs of the total admission in the ICU. Blood culture and sensitivity was performed prior to antibiotic administration in this study. Results: In this research, total sample was 1367 patients. Among these sepsis patients were 305 (nearly 22%). These 305 studied sepsis cases, majority 128 (42%) of the patients were within the age group of 41 - 65 years, followed by 18 - 30 years consisting of 116 (38%) and the least number of sepsis patients were in the age group of >65 years (20%). This study found that 129 (42.3%) out of 305 blood samples screened from assumed sepsis infection were affirmative for the presence of sepsis causing pathogens. Among the 129 culture positive samples, majority of the isolated micro-organisms were gram negative bacteria 58% (75), followed by gram positive bacteria 38% (49), and 3.8% (5) were the fungi Candida albicans. Conclusion: At present, mortality & morbidity of sepsis subject was too big due to late identification, wrong & inadequate management of sepsis in the ward and also in the intensive care unit of Bangladesh.

关键词： Sepsis ICU SIRS Empirical Antibiotic

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