نتایج جستجو برای: dynamic ehd

تعداد نتایج: 406440  

Harmonics have become an important issue in modern power systems. The widespread penetration of non-linear loads to emerging power systems has turned power quality analysis into an important operation issue under both steady state and transient conditions. This paper employs an Extended Harmonic Domain (EHD) based framework for dynamic analysis of long term analysis over voltages during the tra...

Journal: :Physical review letters 2013
C S Dutcher T J Woehl N H Talken W D Ristenpart

Colloids are known to form planar, hexagonal closed packed (hcp) crystals near electrodes in response to electrohydrodynamic (EHD) flow. Previous work has established that the EHD velocity increases as the applied ac frequency decreases. Here we report the existence of an order-to-disorder transition at sufficiently low frequencies, despite the increase in the attractive EHD driving force. At l...

2015
Chiho Song John A. Rogers Jong-Man Kim Heejoon Ahn

Electrohydrodynamic (EHD) jet printing is a direct-writing technique which ejects ink through a fine nozzle using an electric field, which has the advantages of high-resolution, rapid printing speed and a wide range of ink selectivity. In this article, the EHD jet printing system is utilized to print patterns of polystyrene (PS) nanofibers. The effect of parameters such as ink concentration, wo...

2015
Delphine Lamargue Hamel Mathilde Deloire Aurélie Ruet Julie Charré-Morin Aurore Saubusse Jean-Christophe Ouallet Bruno Brochet Friedemann Paul

BACKGROUND Depressive mood and other emotional symptoms are common in multiple sclerosis (MS). The patient-reported outcome version of the "Echelle d'Humeur Dépressive" (EHD-PRO) aims to differentiate between two dimensions of depressive mood in people living with MS (PwMS). OBJECTIVES First, to compare EHD-PRO assessment and its two dimensions, lack of emotional control and emotional bluntin...

Journal: :Langmuir : the ACS journal of surfaces and colloids 2010
C R Vigo W D Ristenpart

Electrohydrodynamic (EHD) flows are known to cause rigid colloids to aggregate near electrodes. Here we report that EHD flows also induce immiscible oil droplets to aggregate and, for sufficiently strong field strengths, to coalesce. We measure the aggregation and coalescence rates of micrometer-scale oil droplets in water, and we find that the most effective way to induce coalescence is by sud...

2016
V. Singhal S V. Garimella Vishal Singhal Suresh V. Garimella

The efficiency of conversion of electrical power into fluidic power in an electrohydrody-namic (EHD) pump depends on the bulk fluid velocity. An analytical formulation is developed for calculation of the efficiency of an EHD pump, with and without the presence of a superimposed flow due to an externally imposed pressure gradient. This formulation is implemented into a numerical model, which is ...

2017
Vito Cacucciolo Hiroki Shigemune Matteo Cianchetti Cecilia Laschi Shingo Maeda

Electrohydrodynamics (EHD) refers to the direct conversion of electrical energy into mechanical energy of a fluid. Through the use of mobile electrodes, this principle is exploited in a novel fashion for designing and testing a millimeter-scale untethered robot, which is powered harvesting the energy from an external electric field. The robot is designed as an inverted sail-boat, with the thrus...

Journal: :Annals of surgery 2016
Universe Leung Mithat Gönen Peter J Allen T Peter Kingham Ronald P DeMatteo William R Jarnagin Michael I D'Angelica

OBJECTIVE The aim of the study was to evaluate outcomes after resection of colorectal liver metastases (CRLM) and concurrent extrahepatic disease (EHD), and to define prognostic factors. BACKGROUND There is increasing evidence to support resection of liver metastases and concurrent EHD in selected patients. Long-term survival data are lacking, and prognostic factors are not well defined. ME...

2013
John Richard Thome Lixin Cheng

Effective and versatile microfluidic pumps can be produced by utilizing various electrokinetic effects, such as electrohydrodynamics (EHD), induced-charge electroosmosis (ICEO) and dielectrophoresis (DEP). Among these, traveling-wave EHD (twEHD) has emerged as a powerful pumping mechanism due to its potential for miniaturization and the ability to pump a variety of liquids. However, when twEHD ...

Journal: :Nuclear medicine and biology 1998
R S Harapanhalli K Z Matalka P L Jones A Mahmood S J Adelstein A I Kassis

Ethidium homodimer (EHD) was conjugated to B72.3 monoclonal antibody using a method whereby 85-90% of the conjugated EHD remains available for DNA intercalation. Antibody was thiopropionylated by reaction with N-succinimidyl 3-(2-pyridyldithio)propionate and reduction of pyridyldithio groups with dithiothreitol. EHD was maleimido-functionalized with succinimidyl-4-(N-maleimidoethyl)cyclohexane-...

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