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1. Toward Cost-Effective and Lightweight Doppler Radars: Papercraft-Based Components and Comparisons With Aluminum and 3-D Printed Alternatives

Author

Karatay, Anil, Atac, Enes, and Yaman, Fatih

Abstract

Doppler radar systems have an essential role in various applications, including aviation, weather forecasting, and military surveillance. However, their high fabrication costs and heavy weight may limit their utilization in rapid prototyping, small-scale applications, and seamless transportation. To address these challenges, a novel papercraft-based approach for producing the entire Doppler radar system’s horn antenna, hybrid tee, and short termination components in the X-band was investigated with details in this study, alongside conventional aluminum and 3-D printing methods. This article presents the first attempt to develop a Doppler radar using papercraft-based manufacturing. The papercraft-based approach is cost-effective, lightweight, flexible, and readily available, offering a promising route for improving and fabricating Doppler radar systems that are both affordable and accessible, particularly in resource-limited settings. The experimental results show that the papercraft-based components can perform comparably to conventional aluminum-based and 3-D-printed components, making it an innovative and cost-effective solution for fabricating Doppler radar systems.

Published
2024
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5. Comparison of Isotonic Seawater Nasal Spray Containing Chamomile Liquid Extract and Other Isotonic Seawater Nasal Washing Solutions for Allergic Rhinitis.

Author

Atar, Yavuz, Karaketir, Semih, Aydogdu, Imran, Sari, Hüseyin, Bircan, Hasan Sami, Uyar, Yavuz, Ekincioglu, Enis, Karaketir, Seyma Görcin, Atac, Enes, and Berkiten, Güler

Subjects
DRUG efficacy, KRUSKAL-Wallis Test, STATISTICS, AEROSOLS, STEROIDS, ONE-way analysis of variance, RHINITIS, NASAL irrigation, TERTIARY care, MANN Whitney U Test, PRE-tests & post-tests, RANDOMIZED controlled trials, T-test (Statistics), OCEAN, MUCOCILIARY system, QUESTIONNAIRES, DESCRIPTIVE statistics, CHI-squared test, PLANT extracts, STATISTICAL sampling, DATA analysis software, DATA analysis, PHYSIOLOGIC salines
Abstract

Objective: We aim to demonstrate the effect of an isotonic seawater spray containing chamomile liquid extract on symptoms and nasal mucociliary clearance in patients with allergic rhinitis by comparing it with other isotonic seawater nasal washing solutions. Methods: The study included 123 patients. Based on Allergic Rhinitis and its Impact on Asthma guidelines, mometasone furoate intranasal spray treatment was started for all patients in the group diagnosed with allergic rhinitis. In addition to this treatment, isotonic seawater spray with chamomile liquid extract was added to Group A, isotonic seawater spray to Group B, and isotonic seawater nasal irrigation to Group C. The fourth group (Group D) was given only nasal steroid spray without nasal washing treatment. Before and after treatment in all patients, the Sino-Nasal Outcome Test-22 was performed, and nasal mucociliary clearance times were measured by the saccharin test. Results: The differences in duration of nasal mucociliary clearance and Sino-Nasal Outcome Test-22 values were taken before and after treatment. In Group A, B, C, and D the Sino-Nasal Outcome Test-22 differences were statistically significant (P ≤.001; P ≤.001; P ≤.001, and P =.048, respectively). Only Group A and Group B experienced a significant difference in nasal mucociliary clearance times (P ≤.001; P =.010, respectively). When the Sino-nasal Outcome Test-22 score and nasal mucociliary clearance time differences before and after treatment were compared between all groups, the Sino-Nasal Outcome Test-22 score difference was higher in Group A than in Groups B, C, and D, the differences were found as statistically significant (P =.010; P =.003; P ≤.001, respectively). The nasal mucociliary clearance time difference was higher in Group A than in Groups C and D, the differences were found as statistically significant (P =.010; P =.001, respectively). Conclusion: Isotonic seawater spray containing chamomile liquid extract is seen as a good alternative treatment option for allergic rhinitis patients. [ABSTRACT FROM AUTHOR]

Published
2022
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7. Visual and LIDAR Data Processing and Fusion as an Element of Real Time Big Data Analysis for Rail Vehicle Driver Support Systems

Author

Zoral, Yesim E., Dogan, Sinan, Belenlioglu, Burak, Atac, Enes, and Selver, Alper M.

Abstract

This chapter reviews the challenges, processing and analysis techniques about visual and LIDAR generated information and their potential use in big data analysis for monitoring the railway at onboard driver support systems. It surveys both sensors' advantages, limitations, and innovative approaches for overcoming the challenges they face. Special focus is given to monocular vision due to its dominant use in the field. A novel contribution is provided for rail extraction by utilizing a new hybrid approach. The results of this approach are used to demonstrate the shortcomings of similar strategies. To overcome these disadvantages, dynamic modeling of the tracks is considered. This stage is designed by statistically quantifying the assumptions about the track curvatures presumed in current railway extraction techniques. By fitting polynomials to hundreds of manually delineated video frames, the variations of polynomial coefficients are analyzed. Future trends for processing and analysis of additional sensors are also discussed.

Published
2018

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