Critical study of the aeration capacity (k1a) measurement methods for fermentors. I.: Qualitative analysis of k1a measurement errors and steady-state methods.

1991 ◽  
Vol 37 (4) ◽  
pp. 104-109
Author(s):  
V. LINEK ◽  
O. HOLEČEK
Keyword(s):  
Steady State ◽  
Qualitative Analysis ◽  
Measurement Errors ◽  
Measurement Methods ◽  
Critical Study ◽  
Aeration Capacity

scholarly journals Thermal conductivity of insulating refractory materials: comparison of steady-state and transient measurement methods

Open Ceramics ◽  
2021 ◽  
pp. 100118
Author(s):  
Diana Vitiello ◽  
Benoit Nait-Ali ◽  
Nicolas Tessier-Doyen ◽  
Thorsten Tonnesen ◽  
Luís Laím ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Steady State ◽  
Measurement Methods ◽  
Refractory Materials ◽  
Transient Measurement

Experimental amplitude and frequency control of a self-excited microcantilever by linear and nonlinear feedback

2021 ◽  
Author(s):  
Eisuke Higuchi ◽  
Hiroshi Yabuno ◽  
Yasuyuki Yamamoto ◽  
Sohei Matsumoto
Keyword(s):  
Steady State ◽  
Frequency Control ◽  
High Sensitivity ◽  
High Viscosity ◽  
Measurement Methods ◽  
Nonlinear Feedback ◽  
Force Microscopy ◽  
Atomic Force ◽  
Excited Oscillation ◽  
Experimental Approaches

Abstract In recent years, measurement methods that use resonators as microcantilevers have attracted attention because of their high sensitivity, high accuracy, and rapid response time. They have been widely utilized in mass sensing, stiffness sensing, and atomic force microscopy (AFM), among other applications. In all these methods, it is essential to accurately detect shifts in the natural frequency of the resonator caused by an external force from a measured object or sample. Experimental approaches based on self-excited oscillation enable the detection of these shifts even when the resonator is immersed in a high-viscosity environment. In the present study, we experimentally and theoretically investigate the nonlinear characteristics of a microcantilever resonator and their control by nonlinear feedback. We show that the steady-state response amplitude and the corresponding response frequency can be controlled by cubic nonlinear velocity feedback and cubic nonlinear displacement feedback, respectively. Furthermore, the amplitude and frequency of the steady-state self-excited oscillation can be controlled separately. These results will expand application of measurement methods that use self-excited resonators.

scholarly journals Biasplot: A Package to Effective Plots to Assess Bias and Precision in Method Comparison Studies

2017 ◽  
Vol 17 (1) ◽  
pp. 208-221 ◽  
Author(s):  
Patrick Taffé ◽  
Mingkai Peng ◽  
Vicki Stagg ◽  
Tyler Williamson
Keyword(s):  
Measurement Errors ◽  
Measurement Method ◽  
Quantitative Characteristic ◽  
Method Comparison ◽  
Simulated Data ◽  
Worked Examples ◽  
Measurement Methods ◽  
Reference Standard ◽  
Statistical Methodology ◽  
Limits Of Agreement

Bland and Altman's (1986, Lancet 327: 307–310) limits of agreement have been used in many clinical research settings to assess agreement between two methods of measuring a quantitative characteristic. However, when the variances of the measurement errors of the two methods differ, limits of agreement can be misleading. biasplot implements a new statistical methodology that Taffé (Forthcoming, Statistical Methods in Medical Research) recently developed to circumvent this issue and assess bias and precision of the two measurement methods (one is the reference standard, and the other is the new measurement method to be evaluated). biasplot produces three new plots introduced by Taffé: the “bias plot”, “precision plot”, and “comparison plot”. These help the investigator visually evaluate the performance of the new measurement method. In this article, we introduce the user-written command biasplot and present worked examples using simulated data included with the package. Note that the Taffé method assumes there are several measurements from the reference standard and possibly as few as one measurement from the new method for each individual.

Inverse Determination of Temperature-Dependent Thermal Conductivity Using Steady Surface Data on Arbitrary Objects

2000 ◽  
Vol 122 (3) ◽  
pp. 450-459 ◽  
Author(s):  
T. J. Martin ◽  
G. S. Dulikravich
Keyword(s):  
Thermal Conductivity ◽  
Heat Flux ◽  
Steady State ◽  
Measurement Errors ◽  
Three Dimensional ◽  
Convection Heat Transfer ◽  
Computational Procedure ◽  
Heat Fluxes ◽  
Computational Method ◽  
Transfer Coefficients

An inverse computational method has been developed for the nonintrusive and nondestructive evaluation of the temperature-dependence of thermal conductivity. The methodology is based on an inverse computational procedure that can be used in conjunction with an experiment. Given steady-state heat flux measurements or convection heat transfer coefficients on the surface of the specimen, in addition to a finite number of steady-state surface temperature measurements, the algorithm can predict the variation of thermal conductivity over the entire range of measured temperatures. Thus, this method requires only one temperature probe and one heat flux probe. The thermal conductivity dependence on temperature (k-T curve) can be completely arbitrary, although a priori knowledge of the general form of the k-T curve substantially improves the accuracy of the algorithm. The influence of errors of measured surface temperatures and heat fluxes on the predicted thermal conductivity has been evaluated. It was found that measurement errors of temperature up to five percent standard deviation were not magnified by this inverse procedure, while the effect of errors in measured heat fluxes were even lower. The method is applicable to two-dimensional and three-dimensional solids of arbitrary shape and size. [S0022-1481(00)01703-5]

scholarly journals Indonesian Traditional Ulama Notions Against Wahhabism: A Study of Abi al-Faḍal al-Senoriy’s Thought

2018 ◽  
Vol 26 (2) ◽  
pp. 365
Author(s):  
Muhammad Asif
Keyword(s):  
Qualitative Analysis ◽  
19Th Century ◽  
Educational Institutions ◽  
Critical Study ◽  
Important Work ◽  
Early 19Th Century ◽  
Islamic Tradition ◽  
Nahdlatul Ulama ◽  
Intense Debate ◽  
Muslim Scholars

<p>Studies of the early 19th century on the classical literatures of traditional Indonesian Muslim scholars in response to Wahhabi developments have forgotten the important work of <em>Kawākib al-Lammā‘ah</em> written by Abi al-Faḍal al-Senoriy. This book emerged in the midst of a situation of massive expansion of Wahhabi teachings and of intense debate among modernist and traditional Muslim groups in Indonesia. This book also represents Nahdlatul Ulama’s response towards Wahhabi teachings because the 23rd Nahdlatul Ulama Conference in Solo in 1964 was recommended to be a referred book in pesantrens and other educational institutions of the Nahdlatul Ulama. Through descriptive-qualitative analysis, this article examines the thought of Abi al-Faḍal al-Senoriy in the particular book. This article finds that Abi al-Faḍal has carried out a critical study on Wahhabi teachings, which according to him opposes Sunni teachings for the Wahhabi teachings contradict some important foundation in the <em>Ahl al-Sunnah</em> Islamic tradition in terms of theology, fiqh, and Sufism.</p>

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