scholarly journals Thermotaxis of Janus particles

2021 ◽  
Vol 44 (7) ◽  
Author(s):  
Sven Auschra ◽  
Andreas Bregulla ◽  
Klaus Kroy ◽  
Frank Cichos
Keyword(s):  
Temperature Field ◽  
Surface Fluxes ◽  
Metal Nanoparticle ◽  
Janus Particle ◽  
External Temperature ◽  
Simple Theoretical Model ◽  
The Common ◽  
Fine Tune ◽  
Heated Metal ◽  
Phoretic Mobility

Abstract The interactions of autonomous microswimmers play an important role for the formation of collective states of motile active matter. We study them in detail for the common microswimmer-design of two-faced Janus spheres with hemispheres made from different materials. Their chemical and physical surface properties may be tailored to fine-tune their mutual attractive, repulsive or aligning behavior. To investigate these effects systematically, we monitor the dynamics of a single gold-capped Janus particle in the external temperature field created by an optically heated metal nanoparticle. We quantify the orientation-dependent repulsion and alignment of the Janus particle and explain it in terms of a simple theoretical model for the induced thermoosmotic surface fluxes. The model reveals that the particle’s angular velocity is solely determined by the temperature profile on the equator between the Janus particle’s hemispheres and their phoretic mobility contrast. The distortion of the external temperature field by their heterogeneous heat conductivity is moreover shown to break the apparent symmetry of the problem. Graphic abstract

Cardio-Rheumatology: Cardiovascular Complications in Systemic Autoimmune Rheumatic Diseases / Is Inflammation the Common Link and Target?

2020 ◽  
Vol 18 (5) ◽  
pp. 425-430 ◽  
Author(s):  
Antonis S. Manolis ◽  
Athanasios G. Tzioufas
Keyword(s):  
Risk Stratification ◽  
Rheumatic Diseases ◽  
Cardiovascular Imaging ◽  
Cardiovascular Complications ◽  
Preventive Strategies ◽  
Pathogenetic Mechanisms ◽  
Autoimmune Rheumatic Diseases ◽  
The Common ◽  
Fine Tune

In the current Thematic Issue of Current Vascular Pharmacology (CVP), entitled “Systemic Autoimmune Rheumatic Diseases and Cardiology”, presented in two parts, Part 1 and Part 2, review articles are included from specialists in cardiology, rheumatology, immunology and related fields. These reviews discuss the cardiovascular complications of the main systemic Autoimmune Rheumatic Diseases (ARDs). For example, the underlying pathogenetic mechanisms, the role of cardiovascular imaging and recommendations for prevention and management. These articles place inflammation as the key process, linking cardiovascular complications with ARDs. From all these reviews, the conclusion is the need for collaboration between the disciplines of Rheumatology and Cardiology to establish the emerging field of Cardio- Rheumatology. This will aid to fine-tune risk stratification and optimize preventive strategies and pharmacological therapies for patients with ARDs.

Effects of Blowing Ratio on Multiple Shallow Angle Film Cooling Holes

2012 ◽  
Vol 225 ◽  
pp. 49-54 ◽  
Author(s):  
Kamil Abdullah ◽  
Ken Ichi Funazaki
Keyword(s):  
Temperature Field ◽  
Surface Temperature ◽  
Film Cooling ◽  
Cooling Effectiveness ◽  
Ir Camera ◽  
Film Cooling Effectiveness ◽  
Blowing Ratio ◽  
Hole Configuration ◽  
The Common ◽  
Film Cooling Holes

This paper presents the investigation on the effects of the blowing ratio of multiple shallow angle film cooling holes. Multiple film cooling holes having a shallow hole angle (θ = 20°), arranged to perform in-line hole configuration has been considered in the present study. The investigation focuses on the effects of high blowing ratio of the film cooling effectiveness which have been carried out at ReD= 3100 and BR = 2.0, 3.0 and 4.0. The experiments make use of the IR camera in capturing the surface temperature to determine the film cooling effectiveness. The contours of the film cooling effectiveness distribution together with plots on laterally average film cooling effectiveness along the x/D are presented. The discussions have been made with a support of the temperature field captured at x/D = 3, 13, 23, and 33. The results clearly show the benefit of the employment of shallow hole angle (θ = 20°) at high blowing ratio which is much more superior in comparison to the common hole configuration (θ = 35°).

Analysis of Thermal Effect on Girder with Side Main Rib Section

2014 ◽  
Vol 501-504 ◽  
pp. 495-500
Author(s):  
Niu Jing Ma
Keyword(s):  
Temperature Field ◽  
Temperature Gradient ◽  
Thermal Effect ◽  
Cross Section ◽  
Stress And Strain ◽  
Cable Stayed Bridge ◽  
The Common ◽  
Equivalent Load ◽  
Thermal Difference

According to the common girder with side main rib section of PC cable-stayed bridge with double cable planes, a computational model of two-dimension temperature field is presented. Temperature gradient of main rib, small longitudinal rib, top plate and flange plate was computed respectively, and then the stress and strain of each section are derived through plane cross-section assumption. For the cable-stayed bridge, member structure FEM is applied to compute node equivalent load and displacement, which resulted from both sunshine and seasonal thermal difference. Finally, a case study is analyzed, the results showed: computed and measured deflection of girder that result from thermal effect are very close, therefore, this method is feasible.

scholarly journals Research on Temperature Field of Support Structure for Independent LNG Tank

2020 ◽  
Vol 2 (1) ◽  
Author(s):  
Shifeng Ding ◽  
Li Zhou ◽  
Yingjie Gu ◽  
Yajun Zhou
Keyword(s):  
Temperature Field ◽  
Structural Design ◽  
Cylindrical Tank ◽  
Support Structure ◽  
Thermal Boundary Conditions ◽  
Hull Structure ◽  
The Common ◽  
Nature Gas ◽  
Lng Tank

The independent LNG (Liquified Nature Gas) containment is widely used for small or medium-sized LNG carrier and ship using LNG as fuels. The common tank pattern includes single-spherical-cylindrical tank and double-spherical-cylindrical tank, which is the key to design the hull structure and its support. The support is designed to connect the hull structure and LNG tank. Its main functions are heat transferring and force loading. This paper focus on the temperature field distribution of hull and its support structure. The thermal boundary conditions are simulated according to the heat transfer action, such as thermal convection, heat conduction and thermal radiation. The method on how to carry out thermal analysis is presented for an independent LNG containment. The case study is carried out with two typical independent LNG tanks. One is a tank with double spherical cylindrical in the LNG carrier, and the other is a tank with single spherical cylindrical on the deck of the ship using LNG as fuels. The result shows the method presented in this paper is a good reference for the structural design with independent LNG containment.

scholarly journals Consumers’ Preference and Their Buying Choice

2019 ◽  
Vol 8 (4) ◽  
pp. 3727-3732
Keyword(s):  
Social Media ◽  
Smart Phone ◽  
Common People ◽  
The Social ◽  
Real Value ◽  
The Common ◽  
Phone User ◽  
The Cost ◽  
Near Future ◽  
Fine Tune

Today’s consumers are too smart to buy their needs through various means. But before buying their needs, they go through various online sites and social media review about product performances and price. While surfing this information they can able to evaluate its real value and price advantages, since online establishment need not spend cost for showroom with staff. Consumers need not roam here and there to various shops to evaluate the product performance and its cost. Moving from one place to other is tedious journey and time-consuming part. It is also difficult to ensure their required models are available or not. Moreover, consumers can view forthcoming new models in the manufacture’s site whereas these details may not be shared in showrooms. Earlier accessing internet is complicated and needs a system to view. Now this can be accessed through smart phone. The prices of smart phone were also drastically lowered. After the entry of Jio network, the cost of one GB data were brought down to Rs 15/to Rs 20/- from Rs 250/-. This could be an affordable price for the common people. With the above improvements, the smart phone usage in the country has increased and every smart phone user are in a habit of surfing the internet or interacting in the social media now and then. While so, everybody can be able to see the various products in the online markets and its review. This will provoke the user to buy the products through online. In America ToySaras and BabySaras, retail showrooms of baby products were forced to close during 2018, since most of Americans preferred to shop through online and few other retail shops are in the same stage of closing. The above situation may also be aroused to Indian Market in the near future. To know the objective of the consumers’ preference and their choice, customers’ voice obtained through survey may be helped to us and its findings may help the online marketers to fine tune their strategies accordingly.

scholarly journals BIC in waveguide arrays

2021 ◽  
Vol 255 ◽  
pp. 07001
Author(s):  
Vladimír Kuzmiak ◽  
Jiří Petráček
Keyword(s):  
Bound State ◽  
Coupled Mode Theory ◽  
One Dimensional ◽  
Waveguide Arrays ◽  
Coupled Mode ◽  
Simple Theoretical Model ◽  
The Common ◽  
The One ◽  
Symmetry Protected ◽  
The Continuum

We propose a simple theoretical model based on the coupled-mode theory which allows to calculate the spectral properties and transmittance of the one-dimensional waveguide structures. The model was verified on the common coupled-waveguide array in which the existence of the symmetry-protected bound state in the continuum (BIC) was confirmed experimentally by Plotnik et al. [Phys. Rev. Lett. 107, 28-31 (2011)]. The method can be extended to topologically nontrivial lattices to explore the properties of the BICs protected by time-reversal symmetry.

scholarly journals The effect of periodic change of external temperature on the temperature field of crude oil

2019 ◽  
Vol 15 ◽  
pp. 100526 ◽  
Author(s):  
Junyang Liu ◽  
Jian Zhao ◽  
Minglin Si ◽  
Hang Dong ◽  
Weiqiang Zhao
Keyword(s):  
Temperature Field ◽  
Crude Oil ◽  
Periodic Change ◽  
External Temperature

An Agenda for Purely Confirmatory Research

2012 ◽  
Vol 7 (6) ◽  
pp. 632-638 ◽  
Author(s):  
Eric-Jan Wagenmakers ◽  
Ruud Wetzels ◽  
Denny Borsboom ◽  
Han L. J. van der Maas ◽  
Rogier A. Kievit
Keyword(s):  
Experimental Data ◽  
Data Analysis ◽  
Statistical Tests ◽  
Fine Tuning ◽  
Actual Data ◽  
The Core ◽  
Extrasensory Perception ◽  
The Common ◽  
Fine Tune ◽  
The Way

The veracity of substantive research claims hinges on the way experimental data are collected and analyzed. In this article, we discuss an uncomfortable fact that threatens the core of psychology’s academic enterprise: almost without exception, psychologists do not commit themselves to a method of data analysis before they see the actual data. It then becomes tempting to fine tune the analysis to the data in order to obtain a desired result—a procedure that invalidates the interpretation of the common statistical tests. The extent of the fine tuning varies widely across experiments and experimenters but is almost impossible for reviewers and readers to gauge. To remedy the situation, we propose that researchers preregister their studies and indicate in advance the analyses they intend to conduct. Only these analyses deserve the label “confirmatory,” and only for these analyses are the common statistical tests valid. Other analyses can be carried out but these should be labeled “exploratory.” We illustrate our proposal with a confirmatory replication attempt of a study on extrasensory perception.

Localized thermal processing with a laser-trapped and heated metal nanoparticle

2007 ◽  
Vol 2 (3) ◽  
pp. 398-401 ◽  
Author(s):  
Takayuki Numata ◽  
Hirokazu Tatsuta ◽  
Yoshiaki Morita ◽  
Yukitoshi Otani ◽  
Norihiro Umeda
Keyword(s):  
Thermal Processing ◽  
Metal Nanoparticle ◽  
Heated Metal

scholarly journals The nonstationary thermoelectric elasticity problem for a long piezoceramic cylinder

2021 ◽  
pp. 181-190
Author(s):  
D. A Shlyakhin ◽  
M. A Kalmova
Keyword(s):  
Thermal Conductivity ◽  
Temperature Field ◽  
Heat Conductivity ◽  
The Body ◽  
Body Volume ◽  
Outer Face ◽  
External Temperature ◽  
Measuring Device ◽  
Wall Boundary Conditions ◽  
Temperature Load

А new closed-loop solution for the coupled nonstationary problem of thermoelectric elasticity is designed for a long piezoceramic radially polarized cylinder. The case of the nonstationary load acting on its inner cylindrical surface is considered as a function of temperature change at a given law of the convection heat exchange on the outer face wall (boundary conditions of heat conductivity of the 1st and 3rd types). Electrodynamic cylinder surfaces are connected to a measuring device with a high input resistance (electric idling). We investigate the problem where the rate of the temperature load changes does not affect the inertial characteristics of the elastic system. It makes it possible to expand the initial linear computational relations with the equilibrium, electrostatics and heat conductivity equations with respect to the radial component of the displacement vector, electric potential as well as the function of temperature field changes. Hyperbolic LS-theory of the thermal conductivity is used in the computations. The problem is solved with a generalized method of biorthogonal finite integral transformation based on a multicomponent ratio of eigen functions of two homogeneous boundary value problems. The structural algorithm of this approach allows identifying a conjugated operator, without which it is impossible to solve non-self-conjugated linear problems in mathematical physics. The resulted computational relations make it possible to determine the stress-strain state, temperature and electric fields induced in the piezoceramic element under an arbitrary external temperature effect. By connecting the electroelastic system to the measuring tool, we can find voltage. Firstly, the analysis of the numerical results allows identifying the rate of the temperature load changes, at which it is necessary to use the hyperbolic theory of thermal conductivity. Secondly, it allows determining the physical characteristics of the piezoceramic material for the case when the rate of changing the body volume leads to a redistribution of the temperature field. The developed computational algorithm can be used to design non-resonant piezoelectric temperature sensors.

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