Results 31 to 40 of about 1,137,900 (287)

Thermal Modal Analysis for Volumetric Error Characterization

, 2023
AbstractThe volumetric accuracy of machine tools is significantly impacted by thermal errors, making the evaluation of volumetric accuracy a significant challenge for the manufacturing industry. Several technical solutions have been implemented, both at the industrial and research level, to address this issue. However, considering thermal errors in the
Natalia Colinas-Armijo, Beñat Iñigo, Luis Norberto López de Lacalle, Gorka Aguirre   +3 more
openaire   +1 more source

Measurement Method of Geometric Error of Coordinate Measuring Machine Using Laser Tracer

工程科学与技术, 2021
Geometric error is an important error source of coordinate measuring machine (CMM). The geometric error measurement methods currently used have the problems of low efficiency and low accuracy, which seriously deteriorate the further improvement of the ...
Lin HAN, Liang MI, Xingbao LIU, Qiang TENG, Qiang TANG, Yangqiu XIA   +5 more
doaj  

Reanalysis of multi-temporal aerial images of Storglaciären, Sweden (1959–99) – Part 2: Comparison of glaciological and volumetric mass balances [PDF]

The Cryosphere, 2010
Seasonal glaciological mass balances have been measured on Storglaciären without interruption since 1945/46. In addition, aerial surveys have been carried out on a decadal basis since the beginning of the observation program.
W. Haeberli, P. Thee, T. Koblet, I. Gärtner-Roer, P. Holmlund, P. Jansson, M. Zemp   +6 more
doaj   +1 more source

Principle and Method of Base Station Calibration Based on a Physical Standard for Multi-Station Laser Tracking Measurement

Machines
In the measurement of volumetric errors in CNC machine tools using multi-station laser tracking technology, the coordinate calibration accuracy of external measurement base stations is a key factor determining the system’s final accuracy.
Haitao Li, Yuanbiao Wang, Yawen Wang, Yunlong Yu, Zehao Wang, Weihao Su, Yehao Zhu, Lijun Yang, Chi Ma, Jie Li, Meng Zhang   +10 more
doaj   +1 more source

Evaluation of dosimetric effect caused by slowing with multi-leaf collimator (MLC) leaves for volumetric modulated arc therapy (VMAT)

Radiology and Oncology, 2016
This study is to report 1) the sensitivity of intensity modulated radiation therapy (IMRT) QA method for clinical volumetric modulated arc therapy (VMAT) plans with multi-leaf collimator (MLC) leaf errors that will not trigger MLC interlock during beam ...
Xu Zhengzheng, Wang Iris Z., Kumaraswamy Lalith K., Podgorsak Matthew B.   +3 more
doaj   +1 more source

Correlation of the gamma passing rates with the differences in the dose-volumetric parameters between the original VMAT plans and actual deliveries of the VMAT plans.

PLoS ONE, 2020
PurposeThe aim of this study was to investigate the correlations of the gamma passing rates (GPR) with the dose-volumetric parameter changes between the original volumetric modulated arc therapy (VMAT) plans and the actual deliveries of the VMAT plans ...
Jong Min Park, Chang Heon Choi, Hong-Gyun Wu, Jung-In Kim   +3 more
doaj   +1 more source

RoundMi: A quantitative method to analyze mitochondrial morphology in mitotic cells

FEBS Open Bio, EarlyView.
RoundMi is a workflow for rapid analysis of mitochondrial morphology in mitotic cells. By combining adaptive preprocessing with automated segmentation and quantification, it enables accurate measurements from single focal plane images, reducing acquisition time and computational demands while remaining compatible with high‐throughput fixed and live ...
Elmira Parvindokht Bararpour, Christine Volmert, Valentina Piano   +2 more
wiley   +1 more source

A Step-by-Step Decoupling and Compensation Method for the Volumetric Error for a Gear Grinding Machine

Actuators
Volumetric error decoupling is a critical prerequisite for effective error compensation. In this paper, the forward volumetric error model is established using the screw theory.
Kai Xu, Hao Huang, Rulong Tan, Zhiyu Ding, Xinyuan Wei   +4 more
doaj   +1 more source

Dosimetric effect of rotational setup errors in single-isocenter volumetric-modulated arc therapy of multiple brain metastases

Journal of Medical Physics, 2019
Aim: The aim of this study is to investigate the dosimetric effects of rotational uncertainties in patient positioning on target coverage in stereotactic radiosurgery (SRS) of multiple brain metastases using single isocenter volumetric modulated arc ...
Kasirajan Tamil Selvan, Ganesan Padma, Murugesan Kesavan Revathy, N Arunai Nambi Raj, K Senthilnathan, P Ramesh Babu   +5 more
doaj   +1 more source

Beta1 subunits enable fentanyl‐induced BK channel activation and opioid regulation of cerebral artery diameter

FEBS Open Bio, EarlyView.
During the current opioid crisis, the majority of overdose deaths are attributed to ultra‐potent synthetic opioids, such as fentanyl. While fentanyl exerts its action via opioid receptors, we propose that potassium channels in the brain blood vessels may also sense fentanyl.
Shiwani Thapa, Mohammed Nooh, Akhil Geddati, Alex Dopico, Anna N. Bukiya   +4 more
wiley   +1 more source