Field Trials on the Effectiveness of Radon Protection Measures in New Dwellings

1994 ◽  
Vol 56 (1-4) ◽  
pp. 33-40 ◽  
Author(s):  
M. Woolliscroft ◽  
C. Scivyer ◽  
L. Parkins
Keyword(s):  
Indoor Radon ◽  
Field Trials ◽  
Radon Level ◽  
Annual Average ◽  
Protection Measures ◽  
Building Regulations ◽  
South West ◽  
Level 1 ◽  
Protective Membrane

Abstract The purpose of the field trials reported here was to verify the effectiveness of radon protection measures implemented under UK Building Regulations. Measurements were carried out in a total of 423 dwellings using etched track detectors. Some of the dwellings were protected, others were not. Four factors were considered likely to affect the annual average indoor radon level: (1) The radon level of the area. (2) The type of floor construction. (3) The presence or absence of a protective membrane in the floor construction. (4) Whether the dwelling was detached or attached to other dwellings. The radon level of the area is characterised by the proportion of existing houses in the area above the action level. The type of construction is generally in situ concrete floor or block and beam floor. Houses were situated on a total of 33 sites scattered all over Devon and Cornwall in the south west of England (an area of relatively high radon levels) offering a variety of both terrain and housing types. Statistical analysis showed that the effect of the membrane in reducing the radon level was significant at the 0.1% level. The effect of the floor construction, was however only significant at the 5% level. Neither the radon level of the area in which the dwelling was situated nor whether the dwelling was detached or attached had statistically significant effects on the radon level.

In-situ U-Pb dating of Ries Crater lacustrine carbonates (Miocene, South-West Germany): Implications for continental carbonate chronostratigraphy

2021 ◽  
Vol 568 ◽  
pp. 117011
Author(s):  
Damaris Montano ◽  
Marta Gasparrini ◽  
Axel Gerdes ◽  
Giovanna Della Porta ◽  
Richard Albert
Keyword(s):  
West Germany ◽  
South West ◽  
Lacustrine Carbonates

scholarly journals Integrative analysis of <i>Geobacter</i> spp. and sulfate-reducing bacteria during uranium bioremediation

2012 ◽  
Vol 9 (3) ◽  
pp. 1033-1040 ◽  
Author(s):  
M. Barlett ◽  
K. Zhuang ◽  
R. Mahadevan ◽  
D. Lovley
Keyword(s):  
Sulfate Reducing Bacteria ◽  
Field Trials ◽  
Second Phase ◽  
Sulfate Reducing ◽  
Organic Electron ◽  
Poor Understanding ◽  
Key Factor ◽  
Reducing Bacteria ◽  
The Impact

Abstract. Enhancing microbial U(VI) reduction with the addition of organic electron donors is a promising strategy for immobilizing uranium in contaminated groundwaters, but has yet to be optimized because of a poor understanding of the factors controlling the growth of various microbial communities during bioremediation. In previous field trials in which acetate was added to the subsurface, there were two distinct phases: an initial phase in which acetate-oxidizing, U(VI)-reducing Geobacter predominated and U(VI) was effectively reduced and a second phase in which acetate-oxidizing sulfate reducing bacteria (SRB) predominated and U(VI) reduction was poor. The interaction of Geobacter and SRB was investigated both in sediment incubations that mimicked in situ bioremediation and with in silico metabolic modeling. In sediment incubations, Geobacter grew quickly but then declined in numbers as the microbially reducible Fe(III) was depleted whereas the SRB grow more slowly and reached dominance after 30–40 days. Modeling predicted a similar outcome. Additional modeling in which the relative initial percentages of the Geobacter and SRB were varied indicated that there was little to no competitive interaction between Geobacter and SRB when acetate was abundant. Further simulations suggested that the addition of Fe(III) would revive the Geobacter, but have little to no effect on the SRB. This result was confirmed experimentally. The results demonstrate that it is possible to predict the impact of amendments on important components of the subsurface microbial community during groundwater bioremediation. The finding that Fe(III) availability, rather than competition with SRB, is the key factor limiting the activity of Geobacter during in situ uranium bioremediation will aid in the design of improved uranium bioremediation strategies.

Intangible Cultural Property, Tangible Databases, Visible Debates: The Sawau Project

2009 ◽  
Vol 16 (3) ◽  
pp. 255-272 ◽  
Author(s):  
Guido Carlo Pigliasco
Keyword(s):  
Intellectual Property ◽  
Cultural Property ◽  
Pacific Island ◽  
Protection Measures ◽  
International Agencies ◽  
Intangible Heritage ◽  
Collaborative Tool ◽  
Digital Documentation ◽  
Pacific Island Countries

AbstractIntellectual property claims have long been sustained in a way that is now under severe scrutiny. Pacific Island countries continue to face unauthorized uses of their traditional knowledge and practices. In response, international agencies in collaboration with Pacific Island countries are promoting sui generis forms of protection. The Institute of Fijian Language and Culture's Cultural Mapping Programme looks beyond ongoing debates about indigenous collection and digitization of intangible heritage to promote sui generis protection measures in lieu of western intellectual property law. Supported by an Institute grant, the unfolding Sawau Project creates an archive of sites, stories, and shared memories of the Sawau people of Beqa, an island iconic in Fiji for its firewalking practice (vilavilairevo). Advocating a form of social intervention in situ, The Sawau Project has become a collaborative tool to encourage digital documentation, linkages, and institutional collaborations among Fijian communities and their allies to negotiate and promote alternative forms of protection.

Yield response of restricted-tillering wheat to transient waterlogging on duplex soils

2003 ◽  
Vol 54 (10) ◽  
pp. 957 ◽  
Author(s):  
A. G. Condon ◽  
F. Giunta
Keyword(s):  
Grain Size ◽  
Biomass Production ◽  
Wheat Yield ◽  
Relative Yield ◽  
Field Trials ◽  
Growth And Yield ◽  
Yield Response ◽  
South West ◽  
Relative Extent ◽  
Before And After

Transient waterlogging during winter and spring reduces wheat yield in many parts of southern Australia. Yield reductions from waterlogging are associated with reduced production and survival of tillers, fewer and smaller fertile tillers, and smaller grain size. Under favourable conditions, wheats that have the tiller-inhibition ('tin') gene produce a lower total number of tillers but a higher proportion of large, productive tillers and larger grains than wheats without this gene. These characteristics of restricted-tillering wheat may contribute to improved yield under transient waterlogging. We compared the growth and yield of the commercial variety Bodallin and 2 Bodallin backcross derivatives containing the 'tin' gene in 8 field trials grown on shallow, duplex soils in 1995 and 1996 at 3 locations in the south-west of Western Australia. Trials were sown at standard (1995) and standard and high (1996) seeding rates. Trial-mean yield ranged from 0.5 to 4.7 t/ha, depending on the occurrence and severity of waterlogging before anthesis and of soil water deficit before and after anthesis. Grain yield of the restricted-tillering (RT) lines averaged only c. 80% of Bodallin. At all sites and seeding rates the RT lines had fewer spikes per m2 (45% fewer, on average) but averaged 44% more grains per spike. In 1996 only, grain weight of the RT lines was 6% greater than of Bodallin. There was no evidence that the relative yield of the RT lines was greater at waterlogged sites than at other sites. Waterlogging reduced the number of fertile spikes of RT lines and of Bodallin to the same relative extent and differences in grains per spike and grain size had little effect on relative yields. Even though harvest index of the RT lines was slightly elevated in some environments, biomass production of the RT lines was low in all environments. We conclude that wheats with the 'tin' gene are unlikely to have a yield advantage under transient waterlogging unless their biomass production can match that of more freely tillering wheats.

Five tombs at Knossos

1963 ◽  
Vol 58 ◽  
pp. 30-43 ◽  
Author(s):  
J. N. Coldstream
Keyword(s):  
Good Condition ◽  
Good Deal ◽  
Lower Edge ◽  
Water Pipe ◽  
The West ◽  
Light In August ◽  
South West ◽  
History Of ◽  
The Temple

On the east slope of Lower Gypsades hill, about 100 metres west of the Temple Tomb, a chamber tomb came to light in August 1958, when a cutting for a new water pipe was driven through the area (A in Plate 9 a). In the course of this operation, part of a plain larnax (iii) was sliced off, and much earth removed from the west end of the collapsed chamber: at no point, however, had the municipal workmen penetrated to the tomb floor.The chamber was approached by a sloping dromos (Plate 9 a: length 2·80 metres; max. width 1 metre), roughly cut into the natural kouskouras rock: its walls were approximately perpendicular. Although the gradient varied a good deal, there was no suggestion of a stairway.The blocking wall was found in good condition. Of especial interest were the numerous fragments of larnakes that had been built into its fabric: some of them could be recognized as belonging to each of the three fragmentary larnakes (i, ii, v) whose scattered pieces were found below and around the two undisturbed burials in the chamber (iii, iv). We may thus distinguish two periods in the history of the tomb: larnakes i, ii, and v were evidently smashed up in order to make room for iv and iii, which must have been deposited in that order. The debris of v was found under iv, with a few adult bones in its wreckage. Part of i lay on the floor near the south-west corner, where two plain vases (2, 3) were found in situ, hence, also, came most of the fragments of the fine L.M. IIIA 2 stirrup vase (1), although its other pieces were scattered all over the floor of the tomb. This small group of offerings may belong to the disturbed adult skeleton, whose skull lay up against the lower edge of iii. Curiously, some fragments of i and ii were also found above the broken lid of iv (Plate 9 b): perhaps the lid of the later larnax was accidentally smashed at the time of the funeral, in which case the debris from earlier burials could have been piled up above it, as a rough and ready means of protection.

scholarly journals TEMUAN FRAGMEN GERABAH SEBAGAI INDIKASI PERMUKIMAN KUNO DI SITUS BOROBUDUR

2013 ◽  
Vol 33 (2) ◽  
pp. 211-226
Author(s):  
Agni Sesaria Mochtar
Keyword(s):  
20Th Century ◽  
Cultural Context ◽  
The Other ◽  
Back Side ◽  
The South ◽  
South West ◽  
Pottery Sherds ◽  
Few Data ◽  
The Temple

Borobudur temple has been famously known as one of the Indonesian heritage masterpiece. Various aspects of it had been studied thoroughly since the beginning of 20th century A.D. Those studies tended to be monumental centric, giving less attention to the cultural context of the temple and its surroundings. Settlement in the nearby places is one of the topics which not have been studied much yet; leaving a big question about how the settlement supported continuity of many activities in the temple, or even the other way around; how the temple affected the settlement. There is only a few data about old settlement found in situ in Borobudur site, only abundance of pottery sherds. The analysis applied on to the potteries find during the 2012 excavation had given some information about the old settlement in Borobodur site. The old settlement predicted as resided in the south west area, in the back side of the monument.

scholarly journals Measurements of Radon-222 and its Daughters Concentrations in Buildings of Department Physics in College of Sciences of Baghdad University

2008 ◽  
Vol 5 (4) ◽  
pp. 605-611
Author(s):  
Baghdad Science Journal
Keyword(s):  
Solid State ◽  
Radon Concentration ◽  
Indoor Radon ◽  
Radon Level ◽  
Nuclear Track Detectors ◽  
Radioactive Sources ◽  
Radon Concentrations

The present work aims to investigate approaches, measures and detection of indoor radon level in buildings of the department of physics in college of science of Baghdad University. CR-39 solid state nuclear track detectors were used to measure the radon concentrations inside the rooms, including five laboratories and five workplace rooms in ground and first storey of the department. The average radon concentration at first storey was found to be 43.1±13.2 Bq/m3 and 40.1±13.4 Bq/m3 at the ground storey. The highest level of radon concentration at the first storey in the radioactive sources store was 87.5±29 Bq/m3 while at the ground storey in room(2) was 70.2±24 Bq/m3 which is due to the existence radioactive sources in some selected places at the buildings.

scholarly journals Vertical profiles of sub-micron aerosol single scattering albedo over Indian region immediately before monsoon onset and during its development: Research from the SWAAMI field campaign

2019 ◽  
Author(s):  
Mohanan R. Manoj ◽  
Sreedharan K. Satheesh ◽  
Krishnaswamy K. Moorthy ◽  
Hugh Coe
Keyword(s):  
Active Phase ◽  
Single Scattering ◽  
Single Scattering Albedo ◽  
Development Research ◽  
Aerosol Absorption ◽  
South West ◽  
Aerosol Scattering ◽  
First Time ◽  
Geographical Locations

Abstract. Vertical structures of aerosol single scattering albedo (SSA), from near the surface through the free troposphere, have been estimated for the first time at distinct geographical locations over the Indian mainland and adjoining oceans, using in-situ measurements of aerosol scattering and absorption coefficients aboard the FAAM BAe-146 aircraft during the South West Asian Aerosol Monsoon Interactions (SWAAMI) campaign from June to July 2016. These are used to examine the spatial variation of SSA profiles and also to characterize its transformation from just prior to the onset of Indian Summer Monsoon (June 2016) to its active phase (July 2016). Very strong aerosol absorption, with SSA values as low as 0.7, persisted in the lower altitudes (

Interfacial Viscoelasticity of Crude Oil/Brine: An Alternative Enhanced-Oil-Recovery Mechanism in Smart Waterflooding

SPE Journal ◽  
2018 ◽  
Vol 23 (03) ◽  
pp. 803-818 ◽  
Author(s):  
Mehrnoosh Moradi Bidhendi ◽  
Griselda Garcia-Olvera ◽  
Brendon Morin ◽  
John S. Oakey ◽  
Vladimir Alvarado
Keyword(s):  
Crude Oil ◽  
Water Chemistry ◽  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Interaction Mechanism ◽  
Field Trials ◽  
Wettability Alteration ◽  
Low Salinity ◽  
Injection Water

Summary Injection of water with a designed chemistry has been proposed as a novel enhanced-oil-recovery (EOR) method, commonly referred to as low-salinity (LS) or smart waterflooding, among other labels. The multiple names encompass a family of EOR methods that rely on modifying injection-water chemistry to increase oil recovery. Despite successful laboratory experiments and field trials, underlying EOR mechanisms remain controversial and poorly understood. At present, the vast majority of the proposed mechanisms rely on rock/fluid interactions. In this work, we propose an alternative fluid/fluid interaction mechanism (i.e., an increase in crude-oil/water interfacial viscoelasticity upon injection of designed brine as a suppressor of oil trapping by snap-off). A crude oil from Wyoming was selected for its known interfacial responsiveness to water chemistry. Brines were prepared with analytic-grade salts to test the effect of specific anions and cations. The brines’ ionic strengths were modified by dilution with deionized water to the desired salinity. A battery of experiments was performed to show a link between dynamic interfacial viscoelasticity and recovery. Experiments include double-wall ring interfacial rheometry, direct visualization on microfluidic devices, and coreflooding experiments in Berea sandstone cores. Interfacial rheological results show that interfacial viscoelasticity generally increases as brine salinity is decreased, regardless of which cations and anions are present in brine. However, the rate of elasticity buildup and the plateau value depend on specific ions available in solution. Snap-off analysis in a microfluidic device, consisting of a flow-focusing geometry, demonstrates that increased viscoelasticity suppresses interfacial pinch-off, and sustains a more continuous oil phase. This effect was examined in coreflooding experiments with sodium sulfate brines. Corefloods were designed to limit wettability alteration by maintaining a low temperature (25°C) and short aging times. Geochemical analysis provided information on in-situ water chemistry. Oil-recovery and pressure responses were shown to directly correlate with interfacial elasticity [i.e., recovery factor (RF) is consistently greater the larger the induced interfacial viscoelasticity for the system examined in this paper]. Our results demonstrate that a largely overlooked interfacial effect of engineered waterflooding can serve as an alternative and more complete explanation of LS or engineered waterflooding recovery. This new mechanism offers a direction to design water chemistry for optimized waterflooding recovery in engineered water-chemistry processes, and opens a new route to design EOR methods.

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