Complementary methods to investigate the development of clogging within a horizontal sub-surface flow tertiary treatment wetland

A combination of experimental methods was applied at a clogged, horizontal subsurface flow (HSSF) municipal wastewater tertiary treatment wetland (TW) in the UK, to quantify the extent of surface and subsurface clogging which had resulted in undesirable surface flow. The three dimensional hydraulic conductivity profile was determined, using a purpose made device which recreates the constant head permeameter test in-situ. The hydrodynamic pathways were investigated by performing dye tracing tests with Rhodamine WT and a novel multi-channel, data-logging, flow through Fluorimeter which allows synchronous measurements to be taken from a matrix of sampling points. Hydraulic conductivity varied in all planes, with the lowest measurement of 0.1 md1 corresponding to the surface layer at the inlet, and the maximum measurement of 1550 md1 located at a 0.4m depth at the outlet. According to dye tracing results, the region where the overland flow ceased received five times the average flow, which then vertically short-circuited below the rhizosphere. The tracer break-through curve obtained from the outlet showed that this preferential flow-path accounted for approximately 80% of the flow overall and arrived 8 h before a distinctly separate secondary flow-path. The overall volumetric efficiencyof the clogged system was 71% and the hydrology was simulated using a dual-path, dead-zone storage model. It is concluded that uneven inlet distribution, continuous surface loading and high rhizosphere resistance is responsible for the clog formation observed in this system. The average inlet hydraulic conductivity was 2 md1, suggesting that current European design guidelines, which predict that the system will reach an equilibrium hydraulic conductivity of 86 md1, do not adequately describe the hydrology of mature systems.

Properties of seawater bitterns with regard to liquid-desiccant cooling

This study concerns the properties of the concentrated bittern solutions occurring as by-product from solar salt works, in relation to their potential use as liquid desiccants in cooling systems. Solutions of compositions similar to those of bitterns have been made up in the laboratory, as have concentrated mixtures of MgCl2–MgSO4–H2O. Measurements of vapour pressure have been carried out using an isoteniscope and are reported together with measurements of density and viscosity. Several theoretical models representing these properties are reviewed and compared against the experimental results; the average agreement between theory and experiment is within 5% for vapour pressure and better for the preferred models of the other two properties. Based on these findings, an expression is provided for the equilibrium relative humidity of bitterns as a function of concentration relative to raw seawater. The vapour pressures of bittern solutions are found to be similar to those of solutions containing only magnesium chloride but having the same mass fraction of total salts. Therefore magnesium chloride solution is a reasonable model for bitterns for the purpose of developing the proposed cooling system.

WDM orthogonal subcarrier multiplexing

Electro-optical transceivers can be implemented employing all-analog signal processing in order to achieve low values of power consumption and latency. This paper shows that the spectral efficiency of such solutions can be increased by combining orthogonal multicarrier techniques and off-the-shelf microwave components. A real-time 108-Gbit/s experiment was performed emulating a wavelength division multiplexing (WDM) system composed of five optical channels. The optical carriers were provided by an externally injected gain switched optical frequency comb. Each optical channel transmitted a 21.6-Gbit/s orthogonal subcarrier multiplexing (SCM) signal that was modulated and demodulated in the electrical domain without the requirement for digital signal processing. The net data rate remained higher than 100 Gbit/s after taking into account forward error correction overheads. The use of orthogonally overlapping subchannels achieves an unprecedented spectral efficiency in all-analog real-time broadband WDM/SCM links.

Mean dynamic topography of the North Indian Ocean

A satellite-only Mean Dynamic Topography (MDT) of the North Indian Ocean is estimated from the DIRR5 geoid and CNES_CLS11 mean sea surface (Schaffer et al. 2012). DIRR5 geoid is estimated from the latest release (Release 5) of GOCE gravity data according to previous studies (e.g., Johannessen et al. 2003; Raj, 2014). Note that this MDT estimated is referenced to a time period of 7 years (1993-1999). A correction data obtained from AVISO is later used to convert the MDT to a time reference of 20 years (1993-2012). More details are given in Raj (2016).

All-analogue real-time filter bank OFDM over 50 Km of SSMF using a novel synchronization technique

A 21.6 Gbit/s 1.78 bit/s/Hz OFDM signal is transmitted over 50 Km of fiber without using DSP in the transmitter or the receiver. The synchronization scheme only requires one PLL to synchronize all the subcarriers.

Lives and labors of eminent divines; Charles H. Parkhurst, Dwight Lyman Moody, Ira David Sankey, Philip P. Bliss, and Eben Tourjée. Accounts of their labors of reform and evangelization and sketches of their lives,

Mode of access: Internet.

Seixas family papers, undated, 1746-1911, 1926, 1939.

The collection contains items relating to individual members of the family as well as the Seixas family in general. Included are papers of the following persons: Isaac Mendes Seixas (1708/9-1780/1), a copy of A voyage to Hudson's--Bay, by Henry Ellis, inscribed with his name on the title page, along with additional inscriptions on the end papers (1748); and a daily prayer book printed in Amsterdam (title page missing), with an inscription on the first page indicating that the book was owned by Seixas in 1758/9, and subsequently by his grandson, Theodore J. Seixas, in 1816/17.

Uriah P. Levy collection undated, 1787-1948, 1959, 1961, 1985, 2005.

Contains the notebook and correspondence of Abram Kanof relating to the naval career and activities of Uriah P. Levy; the correspondence, memoranda, newspaper clippings, and a manuscript paper of Isaac Markens pertaining to the alleged claim that Levy was instrumental in abolishing flogging in the Navy; personal documents including a letter to Captain E.A.F. Lavalette concerning the behavior of officers under Levy's command as commodore of the Mediterranean fleet (1859), a photostatic copy of his will and the inventory of his estate (1862), and published material by and about Uriah Phillips Levy including a bound typewritten copy of "Record of Naval Court of Inquiry, 1857;" An essay on flogging in the Navy, 1849; Memorial of Uriah P. Levy, ... 1855; an original copy of a Manual of rules for men-of-war by Captain U.P. Levy, 1862; and Monticello and its preservation, since Jefferson's death, 1862-1902, by George Alfred Townsend. Also contains the halitza of Virginia Lopez Levy, widow of Uriah P. Levy, 1866, signed by J.J. Lyons; copies of letters of Michael Levy to Henry Deering and Dudley Woolridge, 1787-1788, and a published copy of The defense of Captain Jonas P. Levy. Gift, in part, of the Elsie O. and Philip D. Sang Foundation, 1979 and of Herman Herst, Jr., 1987.

Descendants of Benjamin Seixas

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Petition of Benjamin Jacobs to Hayman Levy to marry a non-Jew

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Copy of letter sent to Benjamin Pereira at Jamaica engaging him as teacher in K. K. S. I.

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Letter from Isaac Seixas to Hayman Levy on proposed marriage of Benjamin Seixas to Zipporah Levy

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Letter regarding prohibition of Philip J. Joachimsen from receiving mitzvah

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