Design and Simulation Analysis of the Lock-up Pressure Observer of the Lock-up Clutch by Zhang Xiaodong, Hu Ning, Bian Xianzhang

“…The lock-up clutch pressure observer is designed based on input-to-state stability（ ISS）.Considering the modeling error and additional disturbance,the ISS theory is introduced to theory to adjust the estimator parameter and ensure the system stability,and taking the uncertainty of model as disturbance inputs and the estimator is designed to ensure the error system is input- to- state stable.Based on the AMESim,the transmission model of automatic transmission is established.The designed observer is realized in the MATLAB/Simulink,and the joint simulation with the transmission model is carried out to verify the correctness of designed lock- up pressure observer of lock- up clutch.Comparing with the sliding mode observer,the designed pressure observer has the better performance.…”
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Fixed-Time Sliding Mode Control for Robotic Manipulators Based on Disturbance Observer by Tianli Li, Gang Zhang, Tan Zhang, Jing Pan

“…A novel controller using fixed-time sliding mode (FTSM) and fixed-time disturbance observer (FTDO) is proposed to achieve trajectory tracking control of robotic manipulators. …”
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Dermocosmetics as an integral part of isotretinoin therapy in acne patients: results of an observational study by Dominika Kwiatkowska, Diana Wolańska-Buzalska, Barbara Zegarska, Adam Reich

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Observational Diagnostics: The Building Block of AI-Powered Visual Aid for Dental Practitioners by Ruchika Raj, Ravikumar Rajappa, Vijayalakshmi Murthy, Mahyar Osanlouy, Daniel Lawrence, Mahen Ganhewa, Nicola Cirillo

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Characterization of the Ionospheric Vertical Error Correlation Lengths Based on Global Ionosonde Observations by L. Yuan, Timothy Kodikara, M. M. Hoque

“…The results show that the proposed model is stable and well‐correlated with the observed VCLs, which implies a potential to be generalized for a global correlation model. …”
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Ischemic Strokes: Observations from a Hospital Based Stroke Registry in Bangladesh by Nirmalendu Bikash Bhowmik, Aamir Abbas, Mohammad Saifuddin, Md. Rashedul Islam, Rumana Habib, Aminur Rahman, Md. Amirul Haque, Zahid Hassan, Mohammad Wasay

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Disturbance Observer-Based Dynamic Surface Control for Servomechanisms with Prescribed Tracking Performance by Xingfa Zhao, Wenhe Liao, Tingting Liu, Dongyang Zhang, Yumin Tao

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Prediction of Severe Injury in Bicycle Rider Accidents: A Multicenter Observational Study by Il-Jae Wang, Young Mo Cho, Suck Ju Cho, Seok-Ran Yeom, Sung Wook Park, So Eun Kim, Jae Chol Yoon, Yeaeun Kim, Jongho Park

“…This was a multicenter observational study. For four years, we included patients with bicycle rider injuries in the Emergency Department-Based Injury In-depth Surveillance database. …”
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Mesospheric tide comparisons at low latitudes observed by two collocated meteor radars by Jian Li, Wen Yi, XiangHui Xue, Jie Zeng, HaiLun Ye, JianYuan Wang, JinSong Chen, Na Li, TingDi Chen

“…However, overall good agreement is observed between the two radars in terms of horizontal winds and tide observations. …”
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Audio–Visual Modeling and its Effect on Behavior of Pediatric Patient: An Observational Study by Sujata Kumari, Amreen Aijazuddin, Anand Nanasaheb Patil, Amish Diwanji, Ranadheer Eeraveni, Disha Makwani, Akshaya Ojha

“…Significant change was observed in behavior of children in before and after the video was shown to them (<0.001). …”
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Perceived stress and coping strategies used by undergraduate dental students: An observational study. by Saira Atif, Nilofar Mustafa, Sarah Ghafoor

“…The aim of the study was to describe the perceived stress and coping strategies that undergraduate students at dental schools of Lahore, Pakistan employ. This observational study was conducted in year 2023 to report perceived stress and coping strategies among 720 undergraduate dental students of Lahore using modified Dental Environment Stress (DES) and brief Coping Orientation to Problems Experienced (COPE) questionnaires. …”
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Chaos Synchronization Based on Unknown Input Proportional Multiple-Integral Fuzzy Observer by T. Youssef, M. Chadli, H. R. Karimi, M. Zelmat

“…This paper presents an unknown input Proportional Multiple-Integral Observer (PIO) for synchronization of chaotic systems based on Takagi-Sugeno (TS) fuzzy chaotic models subject to unmeasurable decision variables and unknown input. …”
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Unprecedented mechanical wave energy absorption observed in multifunctional bioinspired architected metamaterials by Zhendong Li, Xinxin Wang, Kexin Zeng, Zichao Guo, Chong Li, Xiang Yu, Seeram Ramakrishna, Zhonggang Wang, Yang Lu

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Histopathological Spectrum and Immunohistochemistry Expression of Pediatric Solid Malignant Tumors: An Observational Study by Bhumika Patel, Jagadale Kunda, Reena Bharadwaj

“…Aims & Objectives: This study was undertaken to evaluate the histopathological spectrum of pediatric solid malignant neoplasms with IHC and to assess the role of IHC in pediatric solid malignant tumors. Study Design: An observational study of resected malignant solid tumors in the pediatric population including Gross and Histopathological examination was conducted. …”
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Early-time Millimeter Observations of the Nearby Type II SN 2024ggi by Maokai Hu, Yiping Ao, Yi Yang, Lei Hu, Fulin Li, Lifan Wang, Xiaofeng Wang

“…Multiepoch observations were conducted using ALMA band 6 at +8, +13, and +17 days after the discovery. …”
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Assessing climate-growth relationships with daily and monthly observational and gridded meteorological data by Nina Škrk Dolar, Katarina Čufar, Jernej Jevšenak

Subjects: “…observational data…”
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COMPASS: A New COnductance Model Based on PFISR And SWARM Satellite Observations by Zihan Wang, Shasha Zou

“…The underlying physical mechanisms of the observed variations of the model parameters are also discussed. …”
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Interhospital Patient Transfers from the Emergency Department: A Retrospective, Observational Study by Ali Cankut Tatlıparmak

“…Materials and methods: This retrospective, observational, descriptive study examined interhospital patient transfers from İstanbul Emergency Department to other hospitals for four years (2018–2022). …”
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Public Health Messaging on Twitter During the COVID-19 Pandemic: Observational Study by Ashwin Rao, Nazanin Sabri, Siyi Guo, Louiqa Raschid, Kristina Lerman

“…We also analyzed their interactions with political elites and the public’s engagement with PHEs to gain a deeper understanding of their influence on public discourse. MethodsFor this observational study, we gathered a dataset of >539,000 original posts or reposts from 489 PHEs and 356 pseudoexperts on Twitter (subsequently rebranded X) from January 2020 to January 2021, along with the replies to the original posts from the PHEs. …”
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Taste Dysfunction in COVID-19 Patients; A Cross-Sectional Observational Study by Sreedevi Nunkappa Thippeswamy, Keerthi Kumar Kabbyar Chidananda, Kamalesh Tagadur Nataraju

“…Materials and methods:It is a cross sectional observational study involving COVID-19 patients aged between 18 to 100 years. …”
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