An Analysis of Force Response by Using Spectrogram

2015 ◽  
Vol 781 ◽  
pp. 466-470
Author(s):  
Napol Varachitchai ◽  
Chowarit Mitsantisuk
Keyword(s):  
Force Sensor ◽  
High Accuracy ◽  
Human Operator ◽  
Flexible Systems ◽  
Force Response ◽  
Bilateral Control ◽  
Accuracy And Precision ◽  
Robot Systems ◽  
Haptic Technology

In haptic technology, robot has to contact with objects and human operator. The robot systems must be flexible systems, high accuracy and precision during the operation for safe the human operator. So, analysis of the force response is a necessary ability to design the controller of the robot systems. This paper proposes a methodology to analyze force response by mean of spectrogram analysis. The master-slave robot based on bilateral control is used by human operator. Disturbance Observe (DOB) is used to estimate the force response instead of force sensor to improve the performance of the whole system. Finally, force response is analyzed by spectrogram. The availability of the proposed method is shown in an experiment.

Simultaneous measurement of two major prostacyclin metabolites in urine

1990 ◽  
Vol 36 (11) ◽  
pp. 1978-1980 ◽  
Author(s):  
S Zureick ◽  
J Nadler ◽  
J Yamamoto ◽  
R Horton
Keyword(s):  
Angiotensin Ii ◽  
Blood Vessels ◽  
Simultaneous Measurement ◽  
Healthy Subjects ◽  
High Accuracy ◽  
High Concentration ◽  
Accuracy And Precision ◽  
Overall Evaluation ◽  
Excretion Rates ◽  
Apparently Healthy

Abstract We describe a combined HPLC-RIA technique to measure both major metabolites of prostacyclin (PGI2): 6-keto PGF1 alpha and 2,3-dinor-6 keto PGF1 alpha. The measurement of the former, which originates from renal blood vessels, and the latter, from systemic vessels and the liver, may provide a better overall evaluation of production than measurement of one metabolite. An aliquot of acidified urine with added 3H-labeled metabolites is adsorbed and then eluted from a C18 Bond-Elut column. The sample is then passed through an HPLC system by use of an isocratic solvent combination that separates the two metabolites from known prostaglandins. The purified metabolites are then quantified by RIA. Using a logit-log10 transform, one can measure between 12 and 250 pg of either metabolite, with high accuracy and precision (CVs of 12% for a low concentration and 7% for a high concentration). Reference values for apparently healthy subjects were, respectively, 107 (SD 45) and 171 (SD 69) ng/g creatinine for 6-keto PGF1 alpha and the dinor metabolite in men (n = 18) and 45 (SD 22) and 141 (SD 28) ng/g creatinine, respectively, in women (n = 15). Indomethacin in standard doses reduced both metabolite values by 50%. Intravenous administration of angiotensin II (5 ng/kg of body wt per minute) did not alter excretion rates, but equipressor doses of norepinephrine (0.1 microgram/kg per minute) increased the production of both metabolites (6-keto greater than dinor).

A Novel Way to Characterize the Non-Specific Surface Adhesion of Cancer Cells and Understand Cancer Metastasis

2009 ◽  
Author(s):  
Xin Tang ◽  
Tony Cappa ◽  
Theresa Kuhlenschmidt ◽  
Mark Kuhlenschmidt ◽  
Taher A. Saif
Keyword(s):  
Cancer Cells ◽  
Primary Tumor ◽  
Cancer Metastasis ◽  
Microelectromechanical Systems ◽  
Adhesion Force ◽  
Colon Adenocarcinoma ◽  
Force Sensor ◽  
Human Colon ◽  
Force Response ◽  
Tumor Spread

Cancer deaths are mostly caused by the metastasis of the malignant cells, not by the primary tumor itself. During metastasis, cancer cells detach from the primary tumor, spread to different tissues via blood circulation or lymph system, and reattach to invade new tissues and organs. In this project, we hypothesize that cancer cells manage their invasion by changing their surface adhesivity. To study the cell surface adhesivity, a novel and versatile microelectromechanical systems (MEMS) force sensor is developed to quantify the strength of adhesion between living cancer cells and a probe. The Silicon sensors consist of a probe and 2 flexible cantilever beams, while the probe is used to contact the cancer cell and the flexible beams are used to measure the cell force response in the range from nN to uN. The spring constant of the sensor is 14 nN/ μm. Our results demonstrate that the aggressive HCT-8 cells (from human colon adenocarcinoma) show high nonspecific adhesivity when they aggregate into cell islands, and low surface non-specific adhesivity after they disassociate from the cell islands. The surface adhesivity of less aggressive Caco-2 cells (from human colon carcinoma) and normal MA104 cell (from monkey kidney) are found to be lower than that of before-disassociation HCT-8 cells. Furthermore, the adhesion force response of cancer cells is found to show 2-slope force behavior, which is different from previous results of focal-adhesion detachment experiments. The 2-stage force bearing model is proposed to interpret the underlying mechanism.

scholarly journals Expanding NIST Calibration of Fluorescent Microspheres for Flow Cytometry to More Fluorescence Channels and Smaller Particles

Materials ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4111
Author(s):  
Paul DeRose ◽  
Linhua Tian ◽  
Elzafir Elsheikh ◽  
Aaron Urbas ◽  
Yu-Zhong Zhang ◽  
...  
Keyword(s):  
Flow Cytometry ◽  
Living Cells ◽  
High Accuracy ◽  
Flow Cytometer ◽  
National Institutes Of Health ◽  
Fluorescent Microspheres ◽  
Accuracy And Precision ◽  
Working Together

The National Institute of Standards and Technology (NIST), the National Institutes of Health (NIH) and other industry stakeholders have been working together to enable fluorescence intensities of flow cytometer calibration beads to be assigned quantitative equivalent reference fluorophore (ERF) values with high accuracy and precision. The ultimate goal of this effort is to accurately quantify the number of antibodies bound to individual living cells. The expansion of this effort to assign ERF values to more than 50 fluorescence channels and particles with diameters ranging from 10 μm down to 80 nm is reported here.

Measurement of Vehicle Tire Footprint Pattern and Pressure Distribution Using Piezoresistive Force Sensor Mat and Image Analysis

2010 ◽  
Vol 437 ◽  
pp. 467-471 ◽  
Author(s):  
Rong Sheng Lu ◽  
Ning Liu ◽  
Xiao Huai Chen
Keyword(s):  
Image Processing ◽  
Image Analysis ◽  
Pressure Distribution ◽  
Digital Image Processing ◽  
Force Sensor ◽  
High Accuracy ◽  
Envelope Curve ◽  
Calculation Algorithm ◽  
Measurement Principle ◽  
Novel Method

In this paper, a novel method to measure the footprint pattern of a vehicle tire and its pressure distribution will be put forward. The measurement principle will be presented. The automatic digital image processing methods of the footprint pattern and pressure distribution images, which are used to characterize the footprint pattern, are described. Especially, a novel envelope curve calculation algorithm for finding a pattern boundary is introduced. The experimental results have shown that the methods mentioned in the paper are of robustness and high accuracy.

Evaluation of Vibration Parameters under Machining

2015 ◽  
Vol 669 ◽  
pp. 228-234 ◽  
Author(s):  
Anton Panda ◽  
Marek Prislupčák ◽  
Jozef Jurko ◽  
Tibor Krenický ◽  
Marek Jančík
Keyword(s):  
Feed Rate ◽  
High Accuracy ◽  
Water Jet ◽  
Material Damage ◽  
Abrasive Water Jet ◽  
Accuracy And Precision ◽  
Vibration Parameters ◽  
Unconventional Methods ◽  
Chemical Material

AWJ abrasive water jet belongs to the unconventional methods of machining. Waterjet offers a number of advantages over other cutting methods. There is no heat or chemical material damage, high accuracy and precision, the ability to cut any material and others. Despite many advantages of AWJ has some technical elements that can be improved and optimized. This article deals with effect of vibration on the technological head and consequently wears. The aim of the experiments is to find the most appropriate feed rate, which extends the life of the technological head.

scholarly journals Efficient Proximal Gradient Algorithms for Joint Graphical Lasso

Entropy ◽  
2021 ◽  
Vol 23 (12) ◽  
pp. 1623
Author(s):  
Jie Chen ◽  
Ryosuke Shimmura ◽  
Joe Suzuki
Keyword(s):  
Graphical Model ◽  
State Of The Art ◽  
High Accuracy ◽  
Alternating Direction Method ◽  
Main Approach ◽  
First Order ◽  
Gradient Algorithms ◽  
Graphical Lasso ◽  
Alternating Direction ◽  
Accuracy And Precision

We consider learning as an undirected graphical model from sparse data. While several efficient algorithms have been proposed for graphical lasso (GL), the alternating direction method of multipliers (ADMM) is the main approach taken concerning joint graphical lasso (JGL). We propose proximal gradient procedures with and without a backtracking option for the JGL. These procedures are first-order methods and relatively simple, and the subproblems are solved efficiently in closed form. We further show the boundedness for the solution of the JGL problem and the iterates in the algorithms. The numerical results indicate that the proposed algorithms can achieve high accuracy and precision, and their efficiency is competitive with state-of-the-art algorithms.

scholarly journals Frame Difference Method to Detect Fire and Compare the Accuracy and Precision with Vibe Method

2021 ◽  
Vol 36 (1) ◽  
pp. 629-634
Author(s):  
D. Niharika ◽  
J. Mohana
Keyword(s):  
Conventional Method ◽  
Video Processing ◽  
Difference Method ◽  
High Accuracy ◽  
Monitoring Systems ◽  
Control Group ◽  
Frame Difference ◽  
Accuracy And Precision ◽  
Improved Accuracy ◽  
Experimental Group

Aim: In this paper, the main aim is to detect fire using a novel frame difference method and compare it with conventional method. This is based on video processing and computational methods to reduce the computational complexity. Materials and method: The method was performed over a sample size of 20. Same samples were applied for both the control group and experimental group. Improved accuracy detection was obtained using the proposed method. Results: The Accuracy and precision was found (94.03, 64.62) and (86.24,57.19) was obtained for the frame difference method and conventional method. It also shows a significance of 0.048 for accuracy and 0.018 for precision which is less than 0.05. Conclusion: It would be concluded that the frame difference method is producing high accuracy and precision when compared with the Vibe method. It is applicable for monitoring systems and home security.

scholarly journals Quantitative analysis of gadolinium doped cerium oxide thin films via online-LASIL-ICP-OES

2019 ◽  
Vol 34 (11) ◽  
pp. 2333-2339 ◽  
Author(s):  
C. Herzig ◽  
J. Frank ◽  
A. K. Opitz ◽  
J. Fleig ◽  
A. Limbeck
Keyword(s):  
Thin Films ◽  
Quantitative Analysis ◽  
Cerium Oxide ◽  
High Accuracy ◽  
Icp Oes ◽  
Oxide Thin Films ◽  
Accuracy And Precision

LASIL-ICP-OES is used to determine the stoichiometry of gadolinium doped cerium oxide thin films ranging from 220 to 14 nm with high accuracy and precision.

scholarly journals Determination of Sodium in Biological Materials by Instrumental Neutron Activation Analysis

1997 ◽  
Vol 80 (4) ◽  
pp. 871-882 ◽  
Author(s):  
William C Cunningham ◽  
Stephen G Capar ◽  
David L Anderson
Keyword(s):  
Neutron Activation Analysis ◽  
Instrumental Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Biological Materials ◽  
High Accuracy ◽  
Analytical Technique ◽  
Accuracy And Precision ◽  
Instrumental Neutron Activation

Abstract A formalized method for determining sodium in biological materials by instrumental neutron activation analysis is presented. The method includes common procedures from the numerous options available to this historically nonformalized analytical technique. The number of procedural options is restricted to minimize the method’s complexity, yet the method is still applicable to a variety of neutron activation facilities. High accuracy and precision are achieved by placing bounds on allowed uncertainty at critical stages of the analysis. Analytical results from the U.S. Food and Drug Administration laboratory and 4 other laboratories demonstrate the method’s performance.

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