scholarly journals Liquid testing with your smartphone

2021 ◽  
Vol 64 (10) ◽  
pp. 75-83
Author(s):  
Shichao Yue ◽  
Dina Katabi
Keyword(s):  
Surface Tension ◽  
Kidney Failure ◽  
Water Contamination ◽  
Protein Concentration ◽  
Liquid Surface ◽  
Alcohol Concentration ◽  
Mobile App ◽  
Characteristic Pattern ◽  
Home Test ◽  
At Home

Surface tension is an important property of liquids. It has diverse uses such as testing water contamination, measuring alcohol concentration in drinks, and identifying the presence of protein in urine to detect the onset of kidney failure. Today, measurements of surface tension are done in a lab environment using costly instruments, making it hard to leverage this property in ubiquitous applications. In contrast, we show how to measure surface tension using only a smartphone. We introduce a new algorithm that uses the small waves on the liquid surface as a series of lenses that focus light and generate a characteristic pattern. We then use the phone camera to capture this pattern and measure the surface tension. Our approach is simple, accurate, and available to anyone with a smartphone. Empirical evaluations show that our mobile app can detect water contamination and measure alcohol concentration. Furthermore, it can track protein concentration in the urine, providing an initial at-home test for proteinuria, a dangerous complication that can lead to kidney failure.

App design of distance art education platform under internet ecological environment

2021 ◽  
pp. 002072092098352
Author(s):  
Lanlan Xu ◽  
Qiang Zhou
Keyword(s):  
Art Education ◽  
Interaction Design ◽  
Rapid Development ◽  
Development Trend ◽  
Mobile App ◽  
Traditional Art ◽  
Art Teaching ◽  
Education Platform ◽  
App Design ◽  
At Home

With the rapid development of computer and network technology, the application of mobile app has been involved in all walks of life, especially the traditional art teaching mode. Therefore, it is of great significance to design an app with art learning and education as the main content based on the concept of young people's cognitive psychology and art training. This paper first analyzes the current situation and development trend of art education app at home and abroad, then analyzes and studies the design and application needs of education app at home, clarifies the needs of students and teachers, analyzes the visual and psychological characteristics of teenagers and their impact on interface and interaction design, and finally designs an art education app that meets the domestic needs. The results show that the app can enhance the interest of young people in art learning.

The gas-liquid surface of the penetrable sphere model. II

1978 ◽  
Vol 358 (1694) ◽  
pp. 267-280 ◽  
Keyword(s):  
Surface Tension ◽  
Correlation Function ◽  
Liquid Surface ◽  
Mean Field ◽  
Field Approximation ◽  
Mean Field Approximation ◽  
Intermolecular Potential ◽  
Direct Correlation Function ◽  
Sphere Model ◽  
One Dimensional

The direct correlation function between two points in the gas-liquid surface of the penetrable sphere model is obtained in a mean-field approximation. This function is used to show explicitly that three apparently different ways of calculating the surface tension all lead to the same result. They are (1) from the virial of the intermolecular potential, (2) from the direct correlation function, and (3) from the energy density. The equality of (1) and (2) is shown analytically at all temperatures 0 < T < T c where T c is the critical temperature; the equality of (2) and (3) is shown analytically for T ≈ T c , and by numerical integration at lower temperatures. The equality of (2) and (3) is shown analytically at all temperatures for a one-dimensional potential.

scholarly journals Trickle/pulse flow regime transition in downflow packed tower involving foaming liquids

2012 ◽  
Vol 18 (3) ◽  
pp. 349-359
Author(s):  
Vijay Sodhi
Keyword(s):  
Surface Tension ◽  
Liquid Flow ◽  
Liquid Surface ◽  
Regime Transition ◽  
Pulse Flow ◽  
Packed Tower ◽  
Flow Rates ◽  
Transition Boundary ◽  
Liquid Surface Tension ◽  
Pulsing Flow

The most of past studies in foaming trickle bed reactors aimed at the improvement of efficiency and operational parameters leads to high economic advantages. Conventionally most of the industries rely on frequently used gas continuous flow (GCF) where operational output is satisfactory but not yields efficiently as in pulsing flow (PF) and foaming pulsing flow (FPF). Hydrodynamic characteristics like regime transitions are significantly influenced by foaming nature of liquid as well as gas and liquid flow rates. This study?s aim was to demonstrate experimentally the effects of liquid flow rate, gas flow rates and liquid surface tension on regime transition. These parameters were analyzed for the air-aqueous Sodium Lauryl Sulphate and air-water systems. More than 240 experiments were done to obtain the transition boundary for trickle flow (GCF) to foaming pulsing flow (PF/FPF) by use excessive foaming 15-60 ppm surfactant compositions. The trickle to pulse flow transition appeared at lower gas and liquid flow rates with decrease in liquid surface tension. All experimental data had been collected and drawn in the form of four different transitional plots which are compared and drawn by using flow coordinates proposed by different researchers. A prominent decrease in dynamic liquid saturation was observed especially during regime transitional change. The reactor two phase pressure evident a sharp rise to verify the regime transition shift from GCF to PF/FPF. Present study reveals, the regime transition boundary significantly influenced by any change in hydrodynamic as well as physiochemical properties including surface tension.

scholarly journals Principle and Characteristics of Microparts Self-alignment using Liquid Surface Tension.

2000 ◽  
Vol 66 (2) ◽  
pp. 282-286 ◽  
Author(s):  
Kaiji SATO ◽  
Tomonori SEKI ◽  
Seiichi HATA ◽  
Akira SHIMOKOHBE
Keyword(s):  
Surface Tension ◽  
Liquid Surface ◽  
Liquid Surface Tension

scholarly journals Micro-Assembly Using Liquid Surface Tension : 2nd Report, Study on Working Fluids(Mechanical Systems)

2010 ◽  
Vol 76 (761) ◽  
pp. 69-75 ◽  
Author(s):  
Tetsuya HAGA ◽  
Takeshi MIZUNO ◽  
Masaya TAKASAKI ◽  
Yuji ISHINO ◽  
Yasuhiro KATO
Keyword(s):  
Surface Tension ◽  
Liquid Surface ◽  
Mechanical Systems ◽  
Working Fluids ◽  
Micro Assembly ◽  
Liquid Surface Tension

scholarly journals Measurements and correlations for gas liquid surface tension at high pressure and high temperature

AIChE Journal ◽  
2018 ◽  
Vol 64 (11) ◽  
pp. 4110-4117 ◽  
Author(s):  
C. Leonard ◽  
J-H. Ferrasse ◽  
O. Boutin ◽  
S. Lefevre ◽  
A. Viand
Keyword(s):  
Surface Tension ◽  
High Pressure ◽  
High Temperature ◽  
Liquid Surface ◽  
Liquid Surface Tension

The Implementation and Acceptability of a Combined Mobile Application with a COVID-19 at-Home Test Kit

2021 ◽  
Author(s):  
Adrian H. Zai ◽  
Molly Caffrey ◽  
Conor S. O'Brien ◽  
Dawei Jiang ◽  
Remona Kanyat ◽  
...  
Keyword(s):  
Mobile Application ◽  
Home Test ◽  
Test Kit ◽  
At Home

Supplement to Calculating Vapor–Liquid Surface Tension According to Gibbs

2019 ◽  
Vol 93 (9) ◽  
pp. 1662-1671 ◽  
Author(s):  
Yu. K. Tovbin
Keyword(s):  
Surface Tension ◽  
Liquid Surface ◽  
Liquid Surface Tension ◽  
Vapor Liquid
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