Theoretically exact backprojection filtration algorithm for multi-segment linear trajectory

Recent studies suggest that the developmental curves in adolescence, related to the development of executive functions, could be fitted to a non-linear trajectory of development with progressions and retrogressions. Therefore, the present study proposes to analyze the pattern of development in Perceptual Inhibition (PI), considering all stages of adolescence (early, middle, and late) in intervals of one year. To this aim, we worked with a sample of 275 participants between 10 and 25 years, who performed a joint visual and search task (to measure PI). We have fitted ex-Gaussian functions to the probability distributions of the mean response time across the sample and performed a covariance analysis (ANCOVA). The results showed that the 10- to 13-year-old groups performed similarly in the task and differ from the 14- to 19-year-old participants. We found significant differences between the older group and all the rest of the groups. We discuss the important changes that can be observed in relation to the nonlinear trajectory of development that would show the PI during adolescence.

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Region-of-interest reconstruction of motion-contaminated data using a weighted backprojection filtration algorithm

Medical Physics ◽

10.1118/1.2184439 ◽

2006 ◽

Vol 33 (5) ◽

pp. 1222-1238 ◽

Cited By ~ 8

Author(s):

Martin King ◽

Xiaochuan Pan ◽

Lifeng Yu ◽

Maryellen Giger

Keyword(s):

Region Of Interest ◽

Contaminated Data ◽

Filtration Algorithm

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Desain dan pemodelan kontrol kinematik pergerakan robot beroda dengan menggunakan 6 roda omni-wheels

JURNAL ELTEK ◽

10.33795/eltek.v18i1.226 ◽

2020 ◽

Vol 18 (1) ◽

pp. 116

Author(s):

Indrazno Siradjuddin ◽

Gilang Al Azhar ◽

Anggit Murdani ◽

Mukhamad Luqman Muttaqin Faizin

Keyword(s):

Mobile Robots ◽

General Equation ◽

Robot Control ◽

Sine Wave ◽

Graphical Form ◽

Circular Trajectory ◽

Kinematic Control ◽

Linear Trajectory ◽

Mobile Robot Control ◽

Control Equation

Pengembangan desain kontrol kinematic sangatlah penting dalam pengembangan kontrol untuk robot beroda. Hal ini sangat dibutuhkan mengingat bahwa robot beroda memiliki banyak parameter yang mampu merubah persamaan kontrol kinematiknya terutama pada kontrol kinematik untuk robot beroda dengan jenis roda omnidirectional, baik dari segi jenis roda yang digunakan hingga jumlah roda penggerak yang digunakan. Dengan berbagai macam hal yang dapat merubah persamaan kontrol kinematiknya, maka pada makalah ini dibuat sebuah persamaan kontrol kinematik yang general, yang dapat diaplikasikan untuk berbagai macam roda omnidirectional, serta berbagai jumlah roda yang digunakan. Selain itu persamaan general yang telah dibuat, diaplikasikan untuk menguji respon robot beroda dengan menggunakan 6 buah omni-wheels untuk menguji hasil respon dari persamaan general kontrol yang telah dibuat. Pengujian dilakukan dengan menggunakan simulasi program dengan menggunakan pemrograman dengan menggunakan Bahasa pemrograman python. Hasil yang didapatkan menunjukkan robot mampu bergerak sesuai dengan arah gerak target yang ditentukan, yaitu membentuk pola jalur yang linier serta mampu bergerak membentuk pola lingkaran dan pola setengah gelombang sinus. Hal ini menunjukkan bahwa kontrol kinematik yang dirancang mampu membuat robot bergerak sesuai dengan yang direncanakan. Hasil dari respon robot berupa sinyal kontrol, pola yang dibentuk serta nilai perubahan error disajikan dalam bentuk grafik. Development of the kinematics control is very important for the development of kinematics control for mobile robots. This is very necessary because mobile robots have a lot of factors that can manipulate the equation of its kinematic control, such as the type of wheels, the number of wheels, etc. With this kind of problem, it necessary to generate a general equation for the robot’s kinematic control, which in this journal we purpose the general equation for the mobile robot control, and we evaluate the outcome by applying the general equation into the 6 omnidirectional robot control. To make a valid statement, we simulate the control to understanding the control outcome by using a python program. The results of the simulation show us that the robot can move as planned, that the robot produces a linear trajectory, circular trajectory, and half sine wave trajectory. Depends on the results, it can be concluded that the proposed kinematics control equation can make the robot moves well as we planned. The results of the respons, the trajectory, and the changes in error values are presented in graphical form

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A Study on non-linear trajectory shaped apparatus applied solar tracking device

The Journal of the Korea institute of electronic communication sciences ◽

10.13067/jkiecs.2015.10.11.1277 ◽

2015 ◽

Vol 10 (11) ◽

pp. 1277-1284 ◽

Cited By ~ 1

Author(s):

Jae-Hyeon Han ◽

Chae-Joo Moon ◽

Young-Hak Chang ◽

Man-Soo Choi ◽

Young-Gon Kim ◽

...

Keyword(s):

Linear Trajectory ◽

Solar Tracking ◽

Non Linear ◽

Tracking Device

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DAAM mediates the assembly of long-lived, treadmilling stress fibers in collectively migrating epithelial cells in Drosophila

eLife ◽

10.7554/elife.72881 ◽

2021 ◽

Vol 10 ◽

Author(s):

Kristin M Sherrard ◽

Maureen Cetera ◽

Sally Horne-Badovinac

Keyword(s):

Epithelial Cells ◽

Cell Movement ◽

Stress Fibers ◽

Linear Trajectory ◽

Epithelial Migration ◽

Cells In Culture ◽

Multiple Cell ◽

Developmental Switch ◽

Over Time

Stress fibers (SFs) are actomyosin bundles commonly found in individually migrating cells in culture. However, whether and how cells use SFs to migrate in vivo or collectively is largely unknown. Studying the collective migration of the follicular epithelial cells in Drosophila, we found that the SFs in these cells show a novel treadmilling behavior that allows them to persist as the cells migrate over multiple cell lengths. Treadmilling SFs grow at their fronts by adding new integrin-based adhesions and actomyosin segments over time. This causes the SFs to have many internal adhesions along their lengths, instead of adhesions only at the ends. The front-forming adhesions remain stationary relative to the substrate and typically disassemble as the cell rear approaches. By contrast, a different type of adhesion forms at the SF’s terminus that slides with the cell’s trailing edge as the actomyosin ahead of it shortens. We further show that SF treadmilling depends on cell movement and identify a developmental switch in the formins that mediate SF assembly, with Dishevelled-associated activator of morphogenesis acting during migratory stages and Diaphanous acting during postmigratory stages. We propose that treadmilling SFs keep each cell on a linear trajectory, thereby promoting the collective motility required for epithelial migration.

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Milestone Level Changes From Residency to Fellowship: A Multicenter Cohort Study

Journal of Graduate Medical Education ◽

10.4300/jgme-d-20-00954.1 ◽

2021 ◽

Vol 13 (3) ◽

pp. 377-384

Author(s):

Taylor Sawyer ◽

Megan Gray ◽

Shilpi Chabra ◽

Lindsay C. Johnston ◽

Melissa M. Carbajal ◽

...

Keyword(s):

Professional Development ◽

Medical Knowledge ◽

Fellowship Training ◽

Multicenter Cohort Study ◽

Perinatal Medicine ◽

Linear Trajectory ◽

Next Accreditation System ◽

Fellowship Programs ◽

The Individual ◽

Vital Element

ABSTRACT Background A vital element of the Next Accreditation System is measuring and reporting educational Milestones. Little is known about changes in Milestones levels during the transition from residency to fellowship training. Objective Evaluate the Accreditation Council for Graduate Medical Education (ACGME) Milestones' ability to provide a linear trajectory of professional development from general pediatrics residency to neonatal-perinatal medicine (NPM) fellowship training. Methods We identified 11 subcompetencies that were the same for general pediatrics residency and NPM fellowship. We then extracted the last residency Milestone level and the first fellowship Milestone level for each subcompetency from the ACGME's Accreditation Data System on 89 subjects who started fellowship training between 2014 and 2018 at 6 NPM fellowship programs. Mixed-effects models were used to examine the intra-individual changes in Milestone scores between residency and fellowship after adjusting for the effects of the individual programs. Results A total of 1905 subcompetency Milestone levels were analyzed. The average first fellowship Milestone levels were significantly lower than the last residency Milestone levels (residency, mean 3.99 [SD = 0.48] vs fellowship 2.51 [SD = 0.56]; P < .001). Milestone levels decreased by an average of -1.49 (SD = 0.65) from the last residency to the first fellowship evaluation. Significant differences in Milestone levels were seen in both context-dependent subcompetencies (patient care and medical knowledge) and context-independent subcompetencies (professionalism). Conclusions Contrary to providing a linear trajectory of professional development, we found that Milestone levels were reset when trainees transitioned from general pediatrics residency to NPM fellowship.

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