Study on Tellurium Vapor Composition by Static Method

Heat transfer coefficients were investigated for saturated nucleate pool boiling of binary mixtures of water and glycerin at atmospheric pressure in a wide range of concentrations and heat fluxes. Mixtures with water mass fractions from 100% to 40% were boiled on a horizontal flat copper surface at heat fluxes from about 25 up to 270kWm−2. Experiments were carried out by static and dynamic method of measurement. Results of the static method show that the impact of mixture effects on heat transfer coefficient cannot be neglected and ideal heat transfer coefficient has to be corrected for all investigated concentrations and heat fluxes. Experimental data are correlated with the empirical correlation α=0.59q0.714+0.130ωw with mean relative error of 6%. Taking mixture effects into account, data are also successfully correlated with the combination of Stephan and Abdelsalam (1980) and Schlünder (1982) correlations with mean relative error of about 15%. Recommended coefficients of Schlünder correlation C0=1 and βL=2×10−4ms−1 were found to be acceptable for all investigated mixtures. The dynamic method was developed for fast measurement of heat transfer coefficients at continuous change of composition of boiling mixture. The dynamic method was tested for water–glycerin mixtures with water mass fractions from 70% down to 35%. Results of the dynamic method were found to be comparable with the static method. For water–glycerin mixtures with higher water mass fractions, precise temperature measurements are needed.

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On the Tidal Prism: The Roles of Basin Extension, Bottom Friction and Inlet Cross-Section

Journal of Marine Science and Engineering ◽

10.3390/jmse9010088 ◽

2021 ◽

Vol 9 (1) ◽

pp. 88

Author(s):

Marco Petti ◽

Sara Pascolo ◽

Silvia Bosa ◽

Nadia Busetto

Keyword(s):

Cross Section ◽

Bottom Friction ◽

Static Method ◽

Tidal Prism ◽

Empirical Relationships ◽

Cross Sectional ◽

Asymptotic Regime ◽

Static Regime ◽

The One ◽

Basin Area

The prism of the Lignano tidal inlet was approximately constant over the last forty years, although the section width has halved. This has led to questions concerning the factors that most influence the tidal prism, and on the applicability of the well-known A–P relationship. A conceptual scheme of the sea–channel–lagoon system has been used to perform a sensitivity analysis of different parameters that characterize both the basin and the inlet cross-section. A 2D hydrodynamic model has been applied to evaluate the prism and compare it to the one derived by a static method, which is the basis of the analytical derivation of the A–P linkage. Three regimes have been found in the prism variability as a function of the basin extension: a linear static regime between prism and basin area; an asymptotic regime in which the prism depends only on the basin bottom friction; and an intermediate one. In addition, the roles of the inlet and channel sizes on the prism value have been investigated. The results, compared to the empirical relationships between the prism and the inlet cross-section, show that a variation in the cross-sectional area does not always corresponds to a change in tidal prism.

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ChemInform Abstract: Study of the Vapor of the Cr-Ge, Cr-Sn, and Cr-Pb Systems: Vapor Composition and Dissociation Energy of the Intermetallic Molecules CrGe, CrGe2, CrSn, and CrPb

ChemInform ◽

10.1002/chin.199002009 ◽

1990 ◽

Vol 21 (2) ◽

Author(s):

K. HILPERT ◽

K. RUTHARDT

Keyword(s):

Dissociation Energy ◽

Vapor Composition

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The Application of Fuzzy Optimization Theory in the Selection of Foundation Improvement Methods

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.723.341 ◽

2015 ◽

Vol 723 ◽

pp. 341-344

Author(s):

Li Juan Zhang ◽

Jiang Han ◽

Zhang Ming Li

Keyword(s):

Evaluation Criteria ◽

Fuzzy Optimization ◽

Optimization Theory ◽

Static Method ◽

Optimal Selection ◽

Construction Time ◽

Optimal Degree ◽

Selection Of

Research was conducted on the optimal selection of foundation improvement methods in the paper. Based on fuzzy optimization theory, four evaluation criteria such as construction time are used to evaluate the five improvement methods. The relative optimal degree 0.798 of dynamic-static consolidation method is the maximum which shows that the dynamic-static method is the optimal one; relative optimal degree and multi-evaluating criteria are used to evaluate multi-goals in the fuzzy optimization theory which will lead to the high optimal reliability result.

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Some Relationship between Safety Factor of Earthquake Slope and Related Parameters

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.422.688 ◽

2011 ◽

Vol 422 ◽

pp. 688-692

Author(s):

Xiao Hei He ◽

Geng You Han ◽

Rui Hua Xiao

Keyword(s):

Numerical Simulation ◽

Rock Mechanics ◽

Safety Factor ◽

Limit Equilibrium ◽

Static Method ◽

Acceleration Coefficient ◽

The Wenchuan Earthquake ◽

Stability Of Slope ◽

The Stability ◽

The Relationship

Abstract:Since the Wenchuan earthquake happened, the slope stability had been paid much more attention. The safety factor is an important parameter that can be used to evaluate the stability of slope. The pseudo-static method that based on limit equilibrium and the method of numerical simulation can calculate the safety factor accurately, but the velocity that gets the result is slow. If we can establish the relationship between safety factor and some other parameters, then we can calculate the safety factor by using the relationship more quickly. This paper establishes much relationship, such as the relationship between the rock mechanics parameters and the average danymic safety factor, the relationship between the rock mechanics parameters and the ratio of average danymic safety factor to static safety factor, the relationship between the rock mechanics parameters and the average earthquake acceleration coefficient, the relationship between the average earthquake acceleration coefficient and the ratio of average danymic safety factor to static safety factor, and the relationship between the earthquake acceleration coefficient and the ratio of danymic safety factor to static safety factor on the condition of different rock mass.

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THE SENSITIVITY, SPECIFICITY AND ACCURACY OF STATIC METHOD OF ULTRASONOGRAPHY TO CONFIRM ENDOTRACHEAL INTUBATION IN EMERGENCY DEPARTMENT.

10.36106/ijsr/6729269 ◽

2021 ◽

pp. 8-13

Author(s):

Pankaj Kumar Singh ◽

Budhaditya Sanyal ◽

Mohit Bhatnagar ◽

Mandeep Joshi ◽

Shreya Verma

Keyword(s):

Diagnostic Accuracy ◽

Endotracheal Tube ◽

Predictive Value ◽

Static Method ◽

Tube Placement ◽

Short Course ◽

Endotracheal Tube Placement ◽

Linear Probe ◽

Post Intubation ◽

Sensitivity Specificity

Aims and objectives: This study aims to assess the diagnostic accuracy and timeliness of ultrasonography by static method only for identication of Endotracheal tube (ET Tube) placement in the trachea in emergency settings vs existing clinical methods. Material and Methods: This prospective study was carried out in the emergency room from October 2018 till the end of March 2019. The ultrasonography was performed in 120 emergency patients only after the intubation had been completed ie, static phase. A linear probe was used over the neck to identify the predened signs of ET intubation. Residents who perform ultrasound examination ll a form after assessment of each patient. Results: It was found that Tracheal Intubation-USG Sensitivity was 99.1, Specicity was 91.7, Positive Predictive Value: 99.1, Negative Predictive Value was 91.7 and Accuracy was 98.3%. Ultrasonography can be used as an adjunct tool to verify the ETTposition by Emergency Physicians which can be performed easily after a brieng or short-course training.Conclusion:This study demonstrates that US imaging has a high diagnostic accuracy to immediately conrm proper ETT placement post-intubation in an emergency setup. Therefore, it seems that ultrasonography using a static technique only is a proper screening tool in determining endotracheal tube placement.

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