نتایج جستجو برای: roughened bed

تعداد نتایج: 49912  

2015
Francilena Maria Campos Santos Dias Célia Regina Maio Pinzan-Vercelino Rudys Rodolfo de Jesus Tavares Júlio de Araújo Gurgel Fausto Silva Bramante Melissa Nogueira Proença Fialho

OBJECTIVE To compare shear bond strength of different direct bonding techniques of orthodontic brackets to acrylic resin surfaces. METHODS The sample comprised 64 discs of chemically activated acrylic resin (CAAR) randomly divided into four groups: discs in group 1 were bonded by means of light-cured composite resin (conventional adhesive); discs in group 2 had surfaces roughened with a diamo...

Journal: :Transactions of the Japan Society of Mechanical Engineers 1967

Journal: :Gazi Üniversitesi Fen Bilimleri dergisi 2022

Güneş destekli hava ısıtıcıların çok yaygın kullanım ile birlikte ısı transferi verimlerinin düşük olduğu bilinmektedir. Bu konuda çeşitli çalışmalar yürütülmektedir. Yapılan bu çalışmada yutucu plaka üzerine kare kesit yapay pürüzlülük oluşturularak tasarlanan bir güneş ısıtıcısının sayısal analizi yapılmıştır. Kütle, momentum ve enerji korunumu denklemlerinin simülasyonu, kullanılan hesaplama...

Journal: :Boundary-Layer Meteorology 2022

In this work, we carried out roughness-resolved direct numerical simulations of cube-roughened turbulent channel flows to investigate the effects aligned and staggered arrangements, element spacings, orientations on statistics rough-wall turbulence. The results show that equivalent sandgrain roughness, Reynolds stresses dispersive are affected by spacings arrangements in different ways dependin...

Journal: :Acta Polytechnica CTU Proceedings 2022

In the present study, performance of Reinforced Concrete (RC) beams which were strengthened with Ultra High Performance Fiber (UHPFRC) and dowels at interface was investigated. RC a length 2.2 m UHPFRC layers tensile side. Before application layers, between roughened. During testing, slips recorded using Linear Variable Differential Transformers (LVDTs). The tested under four-point flexural tes...

Journal: :JAMA 2009
Carolyn J Hildreth Alison E Burke Richard M Glass

Journal: :Muscle & nerve 2007
Edwin R Mulder Wolfgang M Kuebler Karin H L Gerrits Joern Rittweger Dieter Felsenberg Dick F Stegeman Arnold de Haan

We analyzed the effects of gravitational unloading on muscular fatigability and the effectiveness of resistive vibration exercise to counteract these changes. Changes in knee extensor fatigability as a consequence of 8 weeks of horizontal bedrest with or without daily resistive vibration exercise were evaluated in 17 healthy male volunteers. Bedrest increased fatigability (% decrease in maximal...

2012
Bhavya Sharma Renee R. Frontiera

The first observations of the Raman spectra of pyridine on roughened silver were made in 19741; however, at this time the authors did not recognize that these spectra were due to any unusual, enhanced, or new phenomena. Since its discovery in 19772, interest in and the use of surface enhanced Raman spectroscopy (SERS) has grown exponentially (Fig. 1). The SERS field has dramatically progressed ...

Journal: :Biochemical Society transactions 2012
Kristy S McKeating Jennifer A Dougan Karen Faulds

SERRS (surface-enhanced resonance Raman scattering) is a vibrational technique, whereby a relatively weak Raman scattering effect is enhanced through the use of a visible chromophore and a roughened metal surface. The direct analysis of DNA by SERRS requires the modification of a nucleic acid sequence to incorporate a chromophore, and adsorption of the modified sequence on to a roughened metal ...

2016
Charles D. Schlesinger

Micro structure is the microscopic surface topography of an implant. In simple terms, is it smooth or is it rough. The rougher the surface, the better. A roughened surface is directly associated with higher implant survival rates (Figure 1) [2]. Micro structure has a direct effect on the osseointegrative process and therefore most important in the long term stability of an implant after healing...

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