Roman Britain in 1938

1939 ◽  
Vol 29 (2) ◽  
pp. 199-230

Mr. V. E. Nash-Williams reports discoveries on three sites. (1) At Llantwit Major, Glamorganshire, where a house was partially excavated in 1888, trial cuttings showed that the structural remains covered an area of about 2 acres, enclosing roughly a square of about 300 ft., on the N, S, and W sides of which were the main buildings with detached outbuildings on the E side. In its final stage the plan was of winged-corridor type with main range on the W and others to the N and S, the latter possibly additional; it was fronted by an internal colonnade of imported freestone and faced on to a cobbled courtyard. A subsidiary range had been tacked on at right angles to the N wing. The walls of local limestone and sandstone remained up to 6 ft. and were decorated with coloured plaster; the floors were mostly of opus signinum. A hypocaust or furnace-chamber in the western or main range, after long use, had been filled in with refuse and a small iron-smelting furnace had been built over it. Two rooms in the N wing, opened in 1888, were cleared ; much of the geometric pavement survived. Three or four more skeletons were found ; they had been buried in rough cists sunk into the pavement or cut through the walls, and therefore at a period when the house was no longer in use. A massively constructed outbuilding, measuring 80 by 26 ft., stood just within the remains of a ditch system. (2) At Caerleon a trench was cut on the SW side of White Hart Lane in the praetentura of Isca abutting on the SE defences. It revealed the primary clay rampart, 15 ft. wide and 6 ft. high, with the inner face of the latest stone rampart outside it ; inside the rampart, and between it and the rampart roadway, a stone building had been inserted (cf. JRS xix, 182). The roadway was 20 ft. wide and heavily metalled and was bordered by the stone culvert of the main drainage-system. On the inner side of the roadway the walls and floor of a stone building, probably a barrack-block, were found.

2017 ◽  
Vol 86 ◽  
pp. 50-59
Author(s):  
Haifeng Liu ◽  
Wei Qian ◽  
Jianli Chen ◽  
Hongli Chen ◽  
Matthew L. Chastain ◽  
...  

2018 ◽  
Vol 2017 (2) ◽  
pp. 552-560 ◽  
Author(s):  
Manfred Schütze ◽  
Maja Lange ◽  
Michael Pabst ◽  
Ulrich Haas

Abstract This contribution serves two purposes. (1) It presents an updated version of the Astlingen example developed by the working group ‘Integral Real Time Control’ of the German Water Association (DWA), which serves as a benchmark example for the setup and evaluation of real time control strategies. As this benchmark is also intended for educational use, it demonstrates a simple RTC algorithm, illustrating the main concepts of RTC of drainage system. (2) The paper also encourages the preliminary analysis of the potential feasibility and benefit of a temporal increase of inflow to the wastewater treatment plant (WWTP) before analysing the WWTP behaviour in detail. For the present example, RTC within the sewer system alone led to almost the same reduction of overflow volume as permitting the inflow to the WWTP to be increased for 6 h within any 24 h, if at all permitted.


Author(s):  
E. M. E. K. Ekanayake ◽  
J. A. Weliwita ◽  
S. Witharana ◽  
J. K. A. T. Rajika ◽  
M. Narayana

2012 ◽  
Vol 163 ◽  
pp. 7-11 ◽  
Author(s):  
Xing Huang ◽  
Wei Qian

Based on historical documents and field survey, the wood bellow of No.3 iron smelting furnace in Liao Dynasty was reconstructed at Shuiquangou, Yanqing in Beijing. Its ultimate wind pressure and the speed were estimated. The ventilate ability for its portion was calculated respectively. Furthermore, the flow field in the furnace blasted with the wood bellow was simulated with software FLUENT. The effect on the iron smelting techniques for single-tuyere blast furnace with this blast ability of the bellow was discussed.


2014 ◽  
Vol 889-890 ◽  
pp. 1022-1026
Author(s):  
Bo Yang ◽  
Wen Jie Ding ◽  
Xiao Yu Zhang

In order to solve the problem of safe automation ignition process for vanadium iron smelting furnace, characteristics of ignition process, matching problem of device to process and its security design direction were analyzed. The requirements of process safety improvement were proposed. Key designs includes ignition furnace trolley positioning mechanism, swinging arm mechanism, the fire pole stretching mechanism, safety parclose, security monitoring devices, automated process of electronic ignition and automatic withdrawal of ignition guns. Application shows 13 safety advantages. In the research, process analysis is foundation, it includes steps refinement of manufacturing operations process, the order, the status, and problems that may occur in each step, this method for automation safe ignition process building could be a reference for similar research and development.


2020 ◽  
Vol 41 (S1) ◽  
pp. s308-s309
Author(s):  
Paz Aranega Bou ◽  
Nicholas Ellaby ◽  
Matthew Ellington ◽  
Ginny Moore

Background: Carbapenemase-producing Enterobacterales (CPE) have become an increasingly common cause of hospital-acquired infections while their reservoirs within the clinical setting remain poorly understood. Outbreaks have been linked to hospital sinks, which have been shown to harbor and, under certain conditions, disperse CPE to surrounding surfaces. Hospital and laboratory studies have proposed that Gram-negative organisms, including CPE, can migrate through plumbing biofilms, leading to widespread contamination of the drainage system. Methods: To assess the prevalence of CPE in hospital sinks, drain swabs and waste trap water samples were taken from 10 sinks in 10 hospitals. Hospitals were in different regions of England; 4 had reported recent cases of CPE infection. To investigate spread and dispersal of CPE, waste traps from a single hospital were installed in a laboratory model sink system. Built to simulate a clinical setting, the model incorporated 12 sinks, 6 of which were connected through a common waste pipe. All 12 taps were automatically flushed. Drainage was automatically controlled. Nutrients were provided daily to maintain the bacterial populations, which were regularly sampled to monitor their composition. At 3 weeks after installation, the waste traps were subjected to a drainage backflow event. Waste trap water populations continued to be monitored, and when transfer between sinks was suspected, isolates were characterized and compared using whole-genome sequencing. Results: Between January and June 2019, 200 samples were taken from 103 sinks. In total, 24 (23%) sinks (in 8 hospitals) harbored CRE; of which 10 (in 5 hospitals) harbored at least 1 CPE. Immediately after a backflow event in the laboratory model system, 2 KPC-producing E. cloacae were recovered from a waste trap in which CPE had not been previously detected. The isolates were identified as ST501 and ST31 and were genetically indistinguishable from those colonizing sinks elsewhere in the system. Following intersink transfer, KPC-producing E. cloacae ST501 successfully integrated into the microbiome of the recipient sink and was detected in the waste trap water at least 6 months after the backflow event. At 2 and 3 months after the backflow, other intersink transfers involving Escherichia coli and KPC-producing E. cloacae were also observed. Conclusions: Sink waste traps and drains are a reservoir for CPE in hospitals. Once established, CPE contamination might not be confined to a single sink and could spread through wastewater plumbing. Hospitals frequently report drainage problems, which could cause or facilitate CPE transfer between sinks and could lead to long-term establishment.Funding: NoneDisclosures: None


Author(s):  
Amir Syam ◽  
Zulfikar Zulfikar ◽  
Muhammad Idris Hutasuhut

<span class="12paswordenglishChar"><span>The rotary smelting furnace is a cast iron smelting furnace with the working principle of raw material rotated in a melting drum. The difficulty of this type of furnace is if the furnace wall is damaged, it will be very difficult to determine the appropriate conduction coefficient material as a replacement material. Numerical simulations are required to obtain the heat transfer information that occurs on the furnace wall. This analysis aims to (1) obtain the temperature distribution occurring in the furnace wall, and (2) obtain the heat transfer coefficient on the wall surface on the inside, center, and outside of the melting furnace. Calculation of numerical simulation in this research is assisted by using Ansys software. The theoretical basis of numerical heat transfer simulation analysis can be determined by using the conduction temperature equation in each node. The load conditions in this case are assumed as thermal loads. The result obtained temperature distribution on the inner wall is 1590 <sup>o</sup>C, middle 1470 <sup>o</sup>C, and outside 1104 <sup>o</sup>C.</span></span>


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