Ryan David Valentine is a Welsh footballer who plays as a defender for Bala Town. Valentine signed for Wrexham on a free transfer after leaving Darlington in the summer of 2006. Despite a sending off against Bury on 9 March 2007, Valentine played well for Wrexham, he played a vital part in their bid for survival, scoring the penalty in Wrexham's must win game on 5 May 2007 against Boston United which levelled the score at 1–1. Wrexham stayed in the Football League, it was announced on 18 January 2008 that he has left Wrexham and rejoined his former club Darlington. On 29 May 2009 Valentine signed a one-year deal at League Two side Hereford United. Valentine agreed a further year on his Hereford contract. After an injury hit season which kept him out for 5 months he was told at the end of the season that his contract would not be renewed at Hereford. On 30 June 2011 he signed a one-year deal at AFC Telford United. At the end of the 2011–12 season he signed a new one-year contract with AFC Telford United.
On 11 May 2013 it was announced. On 8 June 2013, Ryan was announced in the Welsh Premier League, he will be eligible to compete for the club in their first European fixtures in the qualifying rounds of the Europa League. Valentine played well in the 2006–07 season and got called up to the Wales national football team to face the Czech Republic and Brazil, again to play Northern Ireland, but has yet to earn a cap. Ryan Valentine at Soccerbase
John Chuang is an American entrepreneur and investor. His parents are immigrants from Taiwan He is the co-founder and CEO of Aquent, a staffing company for the marketing and creative industries, Chairman of the Board of Angie's List, a crowd sourced review website, of which he is a lead investor, he is the co-founder of the litl webbook, a device and cloud-based OS, geared for Internet browsing. He is a graduate of Harvard Business School, he still drove the same 1987 Toyota Corolla he had in college when interviewed by Entrepreneur magazine in 2003. Along with other Harvard College students Mia Wenjen and Steve Kapner, he co-founded in 1986 a typesetting business from the Harvard dorm; that business would go into temporary staffing related to Mac training and late expand into other areas of staffing before becoming one of the largest staffing agencies in the US for creative and marketing industries. He is CEO of an investment fund; the fund is the lead shareholder of Angie's List, a crowd sourced review website, holding 20% of the stock.
Chuang has served on the board of Angie's List since 1996 and assumed the role of Chairman of the board in 2014. Through the fund he has founded companies related to recruiting. In 2007 he was a minority partner with Sean Bisceglia in the creation of TalentDrive, a resume search platform, in 2013 again with Sean Bisceglia, he co-founded Scout, an executive search startup
A level probe is a special pressure transmitter for level measurement of liquids in open vessels and tanks. Level probes are submerged directly into the liquid and remain permanently floating above the tank bottom; the measurement is carried out according to the hydrostatic principle. The gravity pressure of the liquid column causes an expansion of the pressure-sensitive sensor element, which converts the measured pressure into an electrical standard signal; the connecting cable of level probes has several tasks to fulfil. In addition to the power supply and signal forwarding, the level sensor is held in place by the cable; the cable includes a thin air tube that directs the ambient air pressure to the level probe. Level probes are therefore designed as relative pressure sensors, which use the current ambient pressure as the zero point of their measuring range. Without this so-called relative pressure compensation, level probes would not only measure the hydrostatic pressure but the air pressure on the liquid column.
At sea level, this is about 1013 mbar - which would correspond to the pressure exerted by a water column ten meters high. In addition, a variable air pressure would affect the measurement result. Typical air pressure fluctuations of about +/- 20 mbar, corresponding to +/- 20 cmWs. For deep well designs, the Sealed Gauge measuring principle is used. From a depth of approx. 20 m, the relative pressure can only be compensated to a limited extent by the thin hose. The level sensor is designed as an absolute pressure transmitter whose zero point is adjusted to the desired mean air pressure depending on the location of use; this means. Possible fluctuations in air pressure may have an impact on the measurement result, but they play a rather minor role in deep well wells. Hydrostatic pressure gravity pressure or gravity pressure, occurs within a stationary fluid, it depends on the density and height of the liquid column. The mass of the fluid does not matter - see hydrostatic paradox - i. e. not the total weight of the liquid in the container, but the filling level is decisive.
P = ρ g h + p 0 ρ = Density g = Gravitational constant h = Height of the liquid column p 0 = Ambient air pressure p = hydrostatic pressure The measuring minimum level starts from a complete covering of the measuring element near the head end of the level sensor. Filling levels below the level probe are not detected. Depending on the application and mounting height, it is therefore necessary to adjust the level in the evaluation unit to the respective mounting height with an offset setting. Depending on the requirements of the site, level probes offer different features: Protective cap Size and number of openings / holesHousing material Stainless steel, Ttitanium, PTFECable material PE, FEP, PURE EPR, PAMeasuring principle Relative or sealed gaugeSensor technology Piezoresistive silicon sensor, ceramic thick-film sensor, ceramic capacitive