Simulation of Bubbles Aggregation Process Base on Interface Compression Method

2012 ◽  
Vol 569 ◽  
pp. 277-281
Author(s):  
Yong Guang Nie ◽  
Yu Mao ◽  
Juan Wang ◽  
Jiang Yun Wang
Keyword(s):  
Open Source ◽  
Aggregation Process ◽  
Compression Method ◽  
Vof Model ◽  
Key Factor ◽  
The Difference

Interface compression method is a VOF model presented in recent years. In this paper, the difference between interface compression method and classic acceptor-donor methods was revealed. The advection test shown the interface compression method was more accurate than HRIC scheme. The bubble aggregation process was simulated by this method using open source CFD tool OpenFOAM. Simulation shown the method can accurately capture the interface in the process of bubble aggregation and the loop flow is a key factor in the process.

Selective Transport of Water-Soluble Proteins from Aqueous to Ionic Liquid Phase via a Temperature-Sensitive Phase Change of These Mixtures

2012 ◽  
Vol 65 (11) ◽  
pp. 1548 ◽  
Author(s):  
Yuki Kohno ◽  
Nobuhumi Nakamura ◽  
Hiroyuki Ohno
Keyword(s):  
Phase Change ◽  
Aqueous Phase ◽  
Selective Dissolution ◽  
Selective Extraction ◽  
Soluble Proteins ◽  
Water Soluble ◽  
Temperature Sensitive ◽  
Salting Out ◽  
Key Factor ◽  
The Difference

Mixtures of some ionic liquids (ILs) and water show reversible phase change between a homogeneous mixture and phase-separated state by a small change in temperature. Some water-soluble proteins have been migrated from the aqueous to the IL phase. When tetrabutylphosphonium 2,4,6-trimethylbenzenesulfonate was used as an IL, cytochrome c (Cyt.c) was found to be extracted from the water phase to the IL phase. Conversely, both horseradish peroxidase (HRP) and azurin remained in the aqueous phase. This selective extraction was comprehended to be due to the difference in solubility of these proteins in both phases. The separated aqueous phase contained a small amount of IL, which induced the salting-out of Cyt.c. On the other hand, condensed IL phase promoted the salting-in of Cyt.c. As a result, Cyt.c was preferably dissolved in the hydrated IL phase rather than aqueous phase. In the case of HRP, there was only a salting-out profile upon increasing the concentration of IL, which induced selective dissolution of HRP in the aqueous phase. These results clearly suggest that the profile of salting-out and salting-in for proteins is the key factor to facilitate the selective extraction of proteins from aqueous to the IL phase.

scholarly journals Resistência a tração (por compressão diametral) em gessos odontológicos: influência da espessura dos corpos de prova

2021 ◽  
Vol 12 (1) ◽  
pp. 91-108
Author(s):  
Léo Werner Süffert ◽  
Ennio Pessoa
Keyword(s):  
Compression Method ◽  
Diametral Compression ◽  
The Difference ◽  
Tensile Strenght

The influence of different specimen thicknesses on the tensile strenght (by diametral compression method 11) of dental stones has been studdied. It was observed that there was greater reproducibility os results as the thickness of the samples decreased. This leads us to recommend the latter type os samples when conducting diametral compression tensile strenght tests. A relationship between the compression strenght and tensile strenght was also studdied. It was found that the difference between the two strenghts decrenses as the thickness os the diametral compression strenght samples increases. The results were expressed in stress values.

scholarly journals Software-Defined Congestion Control Algorithm for IP Networks

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Yao Hu ◽  
Ting Peng ◽  
Lianming Zhang
Keyword(s):  
Congestion Control ◽  
Transmission Control Protocol ◽  
Rapid Evolution ◽  
Centralized Control ◽  
Network Congestion ◽  
Ip Network ◽  
Key Factor ◽  
Flow Information ◽  
Underlying Network ◽  
The Difference

The rapid evolution of computer networks, increase in the number of Internet users, and popularity of multimedia applications have exacerbated the congestion control problem. Congestion control is a key factor in ensuring network stability and robustness. When the underlying network and flow information are unknown, the transmission control protocol (TCP) must increase or reduce the size of the congestion window to adjust to the changes of traffic in the Internet Protocol (IP) network. However, it is possible that a software-defined approach can relieve the network congestion problem more efficiently. This approach has the characteristic of centralized control and can obtain a global topology for unified network management. In this paper, we propose a software-defined congestion control (SDCC) algorithm for an IP network. We consider the difference between TCP and the user datagram protocol (UDP) and propose a new method to judge node congestion. We initially apply the congestion control mechanism in the congested nodes and then optimize the link utilization to control network congestion.

Differences in the level of body equilibrium by sex in early school-age children

2020 ◽  
Author(s):  
Sanja Ljubičić ◽  
Ljubomir Antekolović ◽  
Vedran Dukarić
Keyword(s):  
Statistical Significance ◽  
Parametric Method ◽  
The Body ◽  
School Age Children ◽  
Motor Deficits ◽  
School Age ◽  
Balance Test ◽  
Key Factor ◽  
The Difference ◽  
Female Bodies

Equilibrium represents the motor capability responsible for the performance of virtually all functional movements. Thus, the importance of early diagnosis of equilibrium levels in boys and girls was recognized as the key factor for the prevention of motor deficits and muscles misbalances later in life. Purpose: The purpose of this paper was to show the difference between boys and girls aged 7‒10 years in the level of unilateral static balance of the take-off leg. Methods: Research was conducted at the Kvarner Athletics Club Rijeka, and it involved 80 children aged 7‒10 years (38 boys and 42 girls). Measurement of static unilateral equilibrium was obtained using Gyko Inertial System (Microgate, Bolzano, Italy). Three attempts were made in 20 seconds and two motor variables were observed: medio-lateral and antero-posterior trajectories of the body. For both variables, the arithmetic mean, the minimum and maximum score and standard deviation were calculated. Moreover, a non-parametric method of the Mann-Whitney U test was used to determine statistical significance between boys and girls. Statistical significance was set at p < 0.05. Results: Statistically, girls have significantly better results compared to boys, both in the medio-lateral trajectory variable (M_Sumg = 335.1, M_Sumb = 479.34) and the antero-posterior trajectory variable (M_Sumg = 291.14, M_Sumb = 411.71). Conclusion: The results of this study showed that girls aged 7‒10 years achieved significantly better results compared to boys in observed motor variables (medio-lateral and antero-posterior trajectory of the body), when performing a static unilateral take-off leg balance test. These results are consistent with previous research. Indications for such results stem from different perspectives, among which the most common one refers to the earlier maturation of the systems responsible for postural control in female bodies. Recommendation for further research is to conduct examination on a larger sample of subjects, in younger children (pre-school age) and with both legs.

scholarly journals The use of intragastric nutrition to study saliva secretion and the relationship between rumen osmotic pressure and water transport

1995 ◽  
Vol 73 (2) ◽  
pp. 155-161 ◽  
Author(s):  
G. Y. Zhao ◽  
M. Durić ◽  
N. A. Macleod ◽  
E. R. ØRskov ◽  
F. D. Deb. Hovell ◽  
...  
Keyword(s):  
Linear Relationship ◽  
Osmotic Pressure ◽  
Water Transport ◽  
Rumen Fluid ◽  
Salivary Secretion ◽  
Saliva Secretion ◽  
Key Factor ◽  
The Difference ◽  
Water Outflow ◽  
The Relationship

Four sheep sustained by intragastric nutrition were used to study saliva secretion and the relationship between osmotic pressure in the rumen and net water transport across the rumen wall. Different concentrations of buffer were infused into the rumen to change the rumen osmotic pressure. Salivary secretion was estimated from entrance of P into the rumen. Net water transport across the rumen wall was calculated as the difference between water inflow and water outflow from the rumen. A negative linear relationship between the rumen osmotic pressure (X, mOsm/kg) and the water absorption across the rumen wall (Y, ml/h) was found: Y = (394 SE 8·3)–(l·22 SE 0·03) X, r20·83, (P < 0·001), and a positive linear relationship was found between the rumen osmotic pressure (X, mOsm /kg) and the outflow rate of rumen fluid (Y, ml/h): Y = (34·0 SE 8·0) + (0·97 SE 0·03), X, r2 0·56, (P < 0·001). The implication is that rumen osmotic pressure can be a key factor in the control of the net water transport across the rumen wall, the outflow of rumen fluid to omasum and the rumen liquid dilution rate. A method is suggested by which salivary secretion in sheep may be calculated from the water balance in the rumen.

Uncertainty analysis of fission fraction for reactor antineutrino experiments

2016 ◽  
Vol 31 (20) ◽  
pp. 1650120 ◽  
Author(s):  
X. B. Ma ◽  
F. Lu ◽  
L. Z. Wang ◽  
Y. X. Chen ◽  
W. L. Zhong ◽  
...  
Keyword(s):  
Uncertainty Analysis ◽  
Open Source ◽  
Correlation Coefficient ◽  
Source Code ◽  
Daya Bay ◽  
Neutrino Experiment ◽  
Open Source Code ◽  
Reactor Neutrino ◽  
Antineutrino Flux ◽  
The Difference

Reactor simulation is an important source of uncertainties for a reactor neutrino experiment. Therefore, how to evaluate the antineutrino flux uncertainty results from reactor simulation is an important question. In this study, a method of the antineutrino flux uncertainty result from reactor simulation was proposed by considering the correlation coefficient. In order to use this method in the Daya Bay antineutrino experiment, the open source code DRAGON was improved and used for obtaining the fission fraction and correlation coefficient. The average fission fraction between DRAGON and SCIENCE code was compared and the difference was less than 5% for all the four isotopes. The uncertainty of fission fraction was evaluated by comparing simulation atomic density of four main isotopes with Takahama-3 experiment measurement. After that, the uncertainty of the antineutrino flux results from reactor simulation was evaluated as 0.6% per core for Daya Bay antineutrino experiment.

scholarly journals Performance Analysis of Different Embedded Systems and Open-Source Optimization Packages Towards an Impulsive MPC Artificial Pancreas

2021 ◽  
Vol 12 ◽  
Author(s):  
Jhon E. Goez-Mora ◽  
María F. Villa-Tamayo ◽  
Monica Vallejo ◽  
Pablo S. Rivadeneira
Keyword(s):  
Embedded Systems ◽  
Open Source ◽  
Control Strategies ◽  
Artificial Pancreas ◽  
Performance Comparison ◽  
Raspberry Pi ◽  
Portable Devices ◽  
Technological Advances ◽  
Computer Environment ◽  
The Difference

Current technological advances have brought closer to reality the project of a safe, portable, and efficient artificial pancreas for people with type 1 diabetes (T1D). Among the developed control strategies for T1D, model predictive control (MPC) has been emphasized in literature as a promising control for glucose regulation. However, these control strategies are commonly designed in a computer environment, regardless of the limitations of a portable device. In this paper, the performances of six embedded platforms and three open-source optimization solver algorithms are assessed for T1D treatment. Their advantages and limitations are clarified using four MPC formulations of increasing complexity and a hardware-in-the-loop methodology to evaluate glucose control in virtual adult subjects. The performance comparison includes the execution time, the difference concerning the evolution obtained in MATLAB, the processor temperature, energy consumption, time percentage in normoglycemia, and the number of hypo- and hyperglycemic events. Results show that Quadprog is the package that faithfully follows the results obtained with control strategies designed and tuned on a computer with the MATLAB software. In addition, the Raspberry Pi 3 and the Tinker Board S embedded systems present the appropriate characteristics to be implemented as portable devices in the artificial pancreas application according to the criteria set out in this work.

scholarly journals Node-Match Tool

2013 ◽  
Author(s):  
Asankhaya Sharma
Keyword(s):  
Open Source ◽  
Graphical Representation ◽  
Ontology Matching ◽  
Ontology Alignment ◽  
Text Similarity ◽  
Node Ranking ◽  
Alignment Algorithms ◽  
The Difference

We present a tool Node-Match that can do ontology matching using node ranking over graphical representation of the ontologies. Simple ontology matching algorithms are based on lexical measures that only consider text similarity. Taking the shape and structure of the ontology into account while matching can lead to better results [1, 2, 3]. Node-Match illustrates the difference between the two approaches. It is based on S-Match [4] an open source toolkit for lightweight ontology matching and alignment. S-Match supports a rich GUI for designing lightweight ontologies and several ontology alignment algorithms. We use the Department Ontology from the running example in [1] to show the difference between difference ontology matching algorithms.

scholarly journals Lung lesions caused by COVID-19 in comparison with bacterial pneumonia and influenza pneumonia: pathomorphological features

2021 ◽  
Vol 102 (5) ◽  
pp. 703-715
Author(s):  
R R Gainetdinov ◽  
S V Kurochkin
Keyword(s):  
Bacterial Pneumonia ◽  
Morphological Difference ◽  
Lung Lesions ◽  
Morphological Findings ◽  
Pulmonary Capillary ◽  
Key Factor ◽  
Influenza Pneumonia ◽  
The Difference ◽  
Development Outcomes ◽  
Course Outcomes

This review aimed to summarize the literature data regarding the pathomorphology of lung lesions in COVID-19 and compare it with lung lesions in bacterial pneumonia and pneumonia caused by influenza virus. The analysis of scientific literature containing studies of domestic and foreign authors of different years related to morphology and anatomical pathology of lung injury was carried out. Special attention was paid to the data devoted to COVID-19 obtained between 2019 and 2021. Based on the study, the main aspects of lung lesions were identified and grouped into blocks depending on the etiology of the process. The review collects and summarizes information on etiology, pathogenesis and stages of disease development, outcomes and morphological picture during the autopsy of patients with bacterial pneumonia, influenza pneumonia and COVID-19 pneumonia. The common features and differences in the course, outcomes and typical morphological findings, most characteristics for each of the diseases were presented in the table. There is a great similarity of morphological findings in influenza pneumonia and COVID-19 pneumonia despite the background of the difference in their epidemiology. Most Russian and foreign authors agree that a key factor in the pathogenesis of the development of COVID-19 is the presence of a specific receptor-mediated pathway of penetration into the cells of the respiratory epithelium. According to most authors, the main morphological difference that determines the severity and unfavorable outcome of COVID-19 is angiopathy and microthrombosis of the pulmonary capillary bed, which aggravate the typical picture of viral pneumonia.

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