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"This is a Scrabo sandstone church, but one that has undergone little conservation. It exhibits a variety of decay types, including the rapid retreat of individual blocks. This occurs when a block loses an outer layer of material through, for example, the falling away of a large scale. The effect of this is to produce a hollow in which salts can continue to accumulate because it is sheltered from rainwash. This salt accumulation, combined with the higher humidity in the shadow of the hollow, creates an excellent environment for accelerated decay. This reinforcement process is known as 'positive feedback' and it means that once decay is 'switched on' in these kinds of weak sandstones it becomes very difficult to turn off.
Part of the detailing on the church includes a string course of Doulting limestone. This is a potential source of gypsum for the quartz sandstone, and it is possible to see how this has lead to the decay of blocks below the limestone. Gypsum can also wash out of the mortars and this can lead to the formation of gypsum crusts on the top parts of stone blocks. The final feature is the growth of algae and lichen on many blocks. There is anecdotal evidence that this greening of sandstone buildings has become widespread across Northern Ireland over the last couple of years and you will see other examples on buildings such as the Elmwood Hall at the other end of the Avenue. Recent work by the Weathering Research Group has suggested that this greening may be linked to changes in weather conditions in which winters have become milder and wetter. This has resulted in stonework remaining saturated for long periods of time, which in turn might encourage biological colonisation and growth. Whether this represents a short-term effect or is indicative of a longer-term change in climate will take more research. However, if it is indicative of a permanent environmental change, it might mean that we have to change many of our ideas about building stone decay. The frequency of the wetting and drying of salts could, for example, decrease and with it the effectiveness of salt weathering. But we would have to take the effects of biological weathering much more seriously. Likewise, conservators may find less call for the treatment of gypsum crusts and a greater interest in the effectiveness of biocide treatments."
B.J. Smith (Weathering Research Group, School of Geography, Queen's University Belfast)
The Frequency au Festival d'été de Québec
Scène Molson Dry du parc de la Francophonie
15 juillet 2010
(crédit: Renaud Philippe)
There is a danger that two transmitters can be set to the same frequency. This club has set up a system of clothespins and numbers. Each frequency has a close pin and when you take a clothespin is removed that frequency is not to be used again. The clothespin also has the frequency on it
Images of different frequency bands formed via EEG in reaction to a N-Back Task.
Image by Jenny Qui.
Nike Air Max 95, Frequency Pack, Men’s Size 13, Black, Yellow, AV7939-001, UPC 00091209658352, 2018, Nike Air Max Frequency Pack, radio-inspired graphic insoles, custom insoles with mixtape graphics, interconnected music and sneaker industries, ‘90s-inspired yellow and black color scheme, yellow waffle-pattern rubber outsole, loop lace system, Padded tongue with NIKE Air Max logo graphic detail, Cushioned inner sole, Traction rubber air bubble outsole, visible Air Unit in the and forefoot heel, unique lacing system, nylon eye stays, leather and mesh upper, AM 95 logo found on the tongue, asymmetrical lacing system, chunky black midsole, Solid rubber modified Waffle outsole, 777
A depiction of the KAP sessions per month for the last 12 years. Well, up to 2002 it is actually rolls of KAP film. After I switched to digital thereabouts it is frequency of KAP Sessions.
© Scarlet Phoebe, 2013
- "On retrouve une certaine mélancolie dans ton album qui n'était pas présente dans l'ancien, comment l'expliques tu ?"
- "Dans la vie on peut pas toujours être heureux, l'année dernière était une année moins heureuse, bah, voila..."
Frequency Dubstep Stage @ Extreme Thing 2013 by Fred Morledge - www.PhotoFM.com
© Fred Morledge 2013
For prints or usage terms/rights please email me Fred@PhotoFM.com
Enjoy and see you next year!
Frequency setting modeDigital, Analog, Serial Communication, Multi-Step Speed , PID etc.
PID control function
Multi-step Speed Control function 8 steps speed control
Energy saving running mode
Siemens model
When the power failed, the system can bypass the fault and continue running.
Rotate speed trace and regenerate function
Assembled shortcut key function
Menu of copy function
When the system failed, it can bypass the fault and continue running.
Timing voltage adjusted functionwhen power supply voltage fluctuate ,it can keep the output voltage constant
Offer the full fault protection function
link: www.china-inverter.net/