Log in

Relevant bibliographies by topics / Dry heather

Contents

Journal articles
Dissertations / Theses
Books
Book chapters
Conference papers
Reports

Academic literature on the topic 'Dry heather'

Author: Grafiati

Published: 4 June 2021

Last updated: 15 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Dry heather.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Dry heather"

1

Welch, David, and David Scott. "Response of moorland vegetation to 20 years of conservation management in two Cairngorm glens." British & Irish Botany 1, no. 1 (2019): 20–38. http://dx.doi.org/10.33928/bib.2019.01.020.

Full text

Abstract:

The response of vegetation to a large reduction in red deer numbers was assessed over a 20 year period in two contrasting glens in the Eastern Cairngorms. Monitoring was done in spring when the annual maximum herbivore impact accumulates on the heather. We estimated deer presence from pellet-group counts, and for heather we measured cover, height and shoot browsing. Deer numbers declined earlier in Glen Derry, and correspondingly heather height increased sooner. Trends in Glen Lui were related to plot wetness and distance from places where the deer were fed in winter; dry plots received much heavier usage from deer and rabbits initially, keeping the heather short and cover stable, whereas on wet plots usage was much lower and heather increased both in cover and height. Subsequently, as deer densities fell, the Lui heather thrived, and by 2013 heather height on dry plots had surpassed height on wet plots. Colonisation by pine saplings was very patchy, being virtually confined to plots within 50 m of mature trees and having heather swards less than 25 cm tall. Despite deer numbers falling, saplings still suffered browsing by black grouse, lagomorphs and voles. Annual increments were greatest on dry plots in Glen Lui. However, we estimate that another eight years of negligible deer numbers are needed for the present sapling crop to become safe from deer damage. A limited regime of burning near mature pines may assist regeneration.

APA, Harvard, Vancouver, ISO, and other styles

2

Voortman, B. R., R. P. Bartholomeus, S. E. A. T. M. van der Zee, M. F. P. Bierkens, and J. P. M. Witte. "Quantifying energy and water fluxes in dry dune ecosystems of the Netherlands." Hydrology and Earth System Sciences 19, no. 9 (2015): 3787–805. http://dx.doi.org/10.5194/hess-19-3787-2015.

Full text

Abstract:

Abstract. Coastal and inland dunes provide various ecosystem services that are related to groundwater, such as drinking water production and biodiversity. To manage groundwater in a sustainable manner, knowledge of actual evapotranspiration (ETa) for the various land covers in dunes is essential. Aiming at improving the parameterization of dune vegetation in hydrometeorological models, this study explores the magnitude of energy and water fluxes in an inland dune ecosystem in the Netherlands. Hydrometeorological measurements were used to parameterize the Penman–Monteith evapotranspiration model for four different surfaces: bare sand, moss, grass and heather. We found that the net longwave radiation (Rnl) was the largest energy flux for most surfaces during daytime. However, modeling this flux by a calibrated FAO-56 Rnl model for each surface and for hourly time steps was unsuccessful. Our Rnl model, with a novel submodel using solar elevation angle and air temperature to describe the diurnal pattern in radiative surface temperature, improved Rnl simulations considerably. Model simulations of evaporation from moss surfaces showed that the modulating effect of mosses on the water balance is species-dependent. We demonstrate that dense moss carpets (Campylopus introflexus) evaporate more (5 %, +14 mm) than bare sand (total of 258 mm in 2013), while more open-structured mosses (Hypnum cupressiforme) evaporate less (−30 %, −76 mm) than bare sand. Additionally, we found that a drought event in the summer of 2013 showed a pronounced delayed signal on lysimeter measurements of ETa for the grass and heather surfaces, respectively. Due to the desiccation of leaves after the drought event, and their feedback on the surface resistance, the potential evapotranspiration in the year 2013 dropped by 9 % (−37 mm) and 10 % (−61 mm) for the grass and heather surfaces, respectively, which subsequently led to lowered ETa of 8 % (−29 mm) and 7 % (−29 mm). These feedbacks are of importance for water resources, especially during a changing climate with an increasing number of drought days. Therefore, such feedbacks need to be integrated into a coupled plant physiological and hydrometeorological model to accurately simulate ETa. In addition, our study showed that groundwater recharge in dunes can be increased considerably by promoting moss vegetation, especially of open-structured moss species.

APA, Harvard, Vancouver, ISO, and other styles

3

Voortman, B. R., R. P. Bartholomeus, S. E. A. T. M. van der Zee, M. F. P. Bierkens, and J. P. M. Witte. "Quantifying energy and water fluxes in dry dune ecosystems of the Netherlands." Hydrology and Earth System Sciences Discussions 12, no. 4 (2015): 4541–94. http://dx.doi.org/10.5194/hessd-12-4541-2015.

Full text

Abstract:

Abstract. Coastal and inland dunes provide various ecosystem services that are related to groundwater, such as drinking water production and biodiversity. To manage groundwater in a sustainable manner, knowledge of actual evapotranspiration (ETa) for the various land covers in dunes is essential. Aiming at improving the parameterization of dune vegetation in hydro-meteorological models, this study explores the magnitude of energy and water fluxes in an inland dune ecosystem in the Netherlands. Hydro-meteorological measurements were used to parameterize the Penman–Monteith evapotranspiration model for four different surfaces: bare sand, moss, grass and heather. We found that the net longwave radiation (Rnl) was the largest energy flux for most surfaces during daytime. However, modelling this flux by a calibrated FAO-56 Rnl model for each surface and for hourly time steps was unsuccessful. Our Rnl model, with a novel sub-model using solar elevation angle and air temperature to describe the diurnal pattern in radiative surface temperature, improved Rnl simulations considerably. Model simulations of evaporation from moss surfaces showed that the modulating effect of mosses on the water balance is species dependent. We demonstrate that dense moss carpets (Campylopus introflexus) evaporate more (5%, +14 mm) than bare sand (total of 258 mm in 2013), while more open structured mosses (Hypnum cupressiforme) evaporate less (−30%, −76 mm) than bare sand. Additionally, we found that a drought event in the summer of 2013 showed a pronounced delayed signal on lysimeter measurements of ETa for the grass and heather surfaces respectively. Due to the desiccation of leaves after the drought event, and their feedback on the parameters of the Penman–Monteith equation, the potential evapotranspiration in the year 2013 dropped with 9% (−37mm) and 10% (−61 mm) for the grass and heather surfaces respectively, which subsequently led to lowered ETa of 8% (−29 mm) and 7% (−29 mm). These feedbacks are of importance to water resources, especially during a changing climate with increasing number of drought days. Therefore, such feedbacks need to be integrated into a coupled plant physiological and hydro-meteorological model to accurately simulate ETa. In addition, our study showed that groundwater recharge in dunes can be increased considerably by promoting moss vegetation, especially of open structured moss species.

APA, Harvard, Vancouver, ISO, and other styles

4

Pakeman, R. J., P. D. Hulme, L. Torvell, and J. M. Fisher. "Rehabilitation of degraded dry heather [ Calluna vulgaris (L.) Hull] moorland by controlled sheep grazing." Biological Conservation 114, no. 3 (2003): 389–400. http://dx.doi.org/10.1016/s0006-3207(03)00067-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Erisman, Jan Willem, Arie H. Versluis, Ton A. J. W. Verplanke, et al. "Monitoring the dry deposition of SO2 in the Netherlands: Results for grassland and heather vegetation." Atmospheric Environment. Part A. General Topics 27, no. 7 (1993): 1153–61. http://dx.doi.org/10.1016/0960-1686(93)90150-w.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

López, Carlos López, Rocío Rosa García, Luis M. M. Ferreira, Urcesino García, Koldo Osoro, and Rafael Celaya. "Impacts of horse grazing on botanical composition and diversity in different types of heathland." Rangeland Journal 39, no. 4 (2017): 375. http://dx.doi.org/10.1071/rj17079.

Full text

Abstract:

Plant dynamics under horse grazing was studied in a three-year field experiment in heather-gorse shrublands in NW Spain. The experimental design consisted of three vegetation types with four replicates (paddocks): (1) heather (Ericaceae)-dominated (H), (2) gorse (Ulex gallii Planch.)-dominated (G), and (3) co-dominated by gorse and heath-grasses (GG). Each paddock (1.2 ha) was grazed from May to October by two crossbred mature mares (310 ± 52 kg bodyweight), one dry and one lactating (plus foal). Two other paddocks (one in H and one in GG) were excluded from grazing. Plant cover and height were sampled three times a year (spring, summer, and autumn) with a point-quadrat method. Floristic composition and diversity were annually sampled at 10 25-m2 quadrats per paddock. Data were subjected to mixed models for repeated-measures and redundancy analyses. Horse grazing resulted in overall increases (P < 0.001) in heather and herbaceous cover (from 13% to 27%, and from 16% to 23%, respectively), and decreases (P < 0.001) in gorse cover and height (from 35% to 17%; from 30 to 25 cm), with scarce differences among vegetation types. Floristic diversity (species richness and Shannon index) increased more over time in grazed than in ungrazed paddocks. Redundancy analyses revealed that grazing effects on plant species assemblages depended on vegetation type, and that plant communities evolved differently between grazing treatments for both abundance and frequency data. Some herbaceous species characteristic of heathlands were favoured by horse grazing. Horse grazing reduced gorse dominance in G and GG vegetation, controlling excessive accumulation of combustible material and reducing fire risk, and promoted the presence of species of conservation interest, so it offers a promising management tool for the restoration of heathlands and their biodiversity.

APA, Harvard, Vancouver, ISO, and other styles

7

López, Carlos López, Rafael Celaya, Ana Sofia Santos, Miguel A. M. Rodrigues, Koldo Osoro, and Luis M. M. Ferreira. "Combination of long-chain alcohols and fatty acids with alkanes as faecal markers to estimate feed intake and digestibility in horses and cattle fed on grass-heathland vegetation communities." Canadian Journal of Animal Science 96, no. 2 (2016): 221–31. http://dx.doi.org/10.1139/cjas-2015-0071.

Full text

Abstract:

Application of long-chain alcohols (LCOH) and long-chain fatty acids (LCFA) combined with alkanes as faecal markers to estimate dry matter intake (DMI) and dry matter digestibility (DMD) of equines and cattle was assessed. Six crossbred mares, randomly divided in two groups (H1 and H2), and three nonlactating cows (C) were housed in individual stalls. Groups H1 and C were fed on a diet of ryegrass (Lolium perenne, 0.7) and heather (Erica spp., Calluna vulgaris, 0.3), and H2 received ryegrass (0.4), heather (0.3) and gorse (Ulex gallii, 0.3). Digestibility was estimated using LCOH (C28-OH and C30-OH) and LCFA (C28-FA, C30-FA, and C32-FA) as internal markers. For DMI estimation, animals received daily a paper pellet containing C24, C32, and C36n-alkanes. Intake was estimated from the faecal ratio of naturally occurring LCOH, LCFA, and dosed n-alkanes, and was compared with the known DMI values. In horses, all markers provided accurate estimates of DMD. Similarly, LCOH provided accurate estimates of DMD in cattle, whereas LCFA underestimated it (P < 0.05). Intake estimates were affected (P < 0.05) by the marker pair used in calculations. In general, the C24:C24-FA pair provided the most accurate DMI estimates. Results suggest the usefulness of combining epicuticular compounds as faecal markers to estimate DMI, DMD and diet composition of horses and cattle grazing grass-heathland communities, simultaneously.

APA, Harvard, Vancouver, ISO, and other styles

8

Spence, Samantha, and Helge Kreutz. "The Kingfisher Field, Block 16/8a, UK North Sea." Geological Society, London, Memoirs 20, no. 1 (2003): 305–14. http://dx.doi.org/10.1144/gsl.mem.2003.020.01.26.

Full text

Abstract:

AbstractThe Kingfisher Field is located in the South Viking Graben, Block 16/8a, with a minor extension into Block 16/8c. Block 16/8 was initially awarded in June 1970 to Shell and Esso, with the Kingfisher discovery well 16/8-1 spudded in 1972. The well tested high H2S oil at marginal rates from Upper Jurassic Brae Formation sandstones. Subsequent appraisal well 16/8a-4 (1984) tested gas/condensate from better quality Brae Formation sandstone reservoirs. This well also discovered the deeper Middle Jurassic Heather Formation sandstone gas/condensate accumulation at near-HPHT conditions. The Brae and Heather Formation sandstones contain stacked hydrocarbon accumulations in separate combinations of stratigraphic and structural traps. Production by natural aquifer drive commenced from a sub-sea satellite to Marathon's Brae B platform in 1997, initially from the Brae reservoirs. To date, three production wells have been completed and a fourth well is planned to be on stream in 2000. The Brae Formation sandstones at Kingfisher are interpreted as distal deposits of the Brae/Miller fan-apron system and range in quality from excellent to very poor across the field. The Heather Formation reservoir consists of medium quality sands deposited within a submarine incised valley. The most recent volumetric estimate (1998) for the total field predicts an ultimate recovery of 41.2 MMBBL of pipeline liquids and 280 BCF of dry export gas. Regional reservoir architecture and connectivity as well as hydrocarbon composition are key to understanding the production performance of the critical gas/condensate below dewpoint. Advances in sub-sea and horizontal drilling technology have enabled field development.

APA, Harvard, Vancouver, ISO, and other styles

9

Starchenko, Galyna, Andriy Hrytsyk, Ain Raal, and Oleh Koshovyi. "Phytochemical Profile and Pharmacological Activities of Water and Hydroethanolic Dry Extracts of Calluna vulgaris (L.) Hull. Herb." Plants 9, no. 6 (2020): 751. http://dx.doi.org/10.3390/plants9060751.

Full text

Abstract:

According to the WHO data (2017), depression is the most predominant disease worldwide, with about 300 million people suffering from it, and bipolar disorder is the second most common. Therefore, it is relevant to research new medicines based on medicinal herbal raw materials with anti-anxiety and antidepressant effects. Common heather (Calluna vulgaris (L.) Hull.), a flowering plant of the Ericaceae family, is a promising species for research in this area. The aim of this study was to investigate the phytochemical profile and several biological activities of hydroethanolic dry extracts from the C. vulgaris herb. Nineteen phenolic substances were identified and quantified in the extracts by HPLC. The quantitative content of the basic groups of biologically active compounds was determined by spectrophotometry. Arbutin was dominant among the hydroquinone derivatives; chlorogenic acid among the hydroxycinnamic acids; rutin, hyperoside and quercetin-3-D-glucoside among the flavonoids; and (+)-gallocatechin and (-)-epigallocatechin among the tannin metabolites. The water and hydroethanolic extract were compared, the extract of C. vulgaris herb obtained with 70% hydroethanolic had the most pronounced anti-inflammatory, antimicrobial, anxiolytic, stress-protective, anti-anxiety and anti-depressant effects, and it is a promising substance for the development of new drugs or food supplements.

APA, Harvard, Vancouver, ISO, and other styles

10

Wu, Shasha, Youping Sun, and Genhua Niu. "Morphological and Physiological Responses of Nine Ornamental Species to Saline Irrigation Water." HortScience 51, no. 3 (2016): 285–90. http://dx.doi.org/10.21273/hortsci.51.3.285.

Full text

Abstract:

To provide more species for landscapes where poor-quality irrigation water is used, salt tolerance of commonly used landscape plants should be characterized. Nine ornamental species, including six herbaceous and three woody, were irrigated with nutrient solution at electrical conductivity (EC) of 1.2 dS·m−1 (control) or saline solution at EC of 5.0 or 10.0 dS·m−1 (EC 5 or EC 10) for 8 weeks and their growth and physiological responses were determined. Although growth was reduced in orange peel jessamine (Cestrum ‘Orange Peel’) and mexican hummingbird bush (Dicliptera suberecta) as salinity increased, no obvious signs of stress or injury were observed, indicating that orange peel jessamine and mexican hummingbird bush were the most salt tolerant. Flame acanthus (Anisacanthus quadrifidus var. wrightii), rock rose (Pavonia lasiopetala), and ‘Dark knight’ bluebeard (Caryopteris ×clandonensis ‘Dark Knight’) had more growth reduction than that of orange peel jessamine and mexican hummingbird bush with minimal or no foliar damage in EC 5 and slight foliar damage in EC 10. Cardinal flower (Lobelia cardinalis) and mexican false heather (Cuphea hyssopifolia) exhibited mortality rates of 30% and 20%, severe foliar damage, and greater than 70% reduction in leaf area and dry weight in EC 10 compared with their respective controls. Although the growth reductions in butterfly blue (Scabiosa columbaria) were not as great as cardinal flower and mexican false heather, 40% of butterfly blue plants were dead with moderate foliar damage in EC 10. Therefore, cardinal flower, mexican false heather, and butterfly blue plants were considered as moderately salt sensitive. Eastern red columbine (Aquilegia canadensis) was the most salt sensitive among the species investigated with moderate foliar damage in EC 5 and all plants died in EC 10. Four out of the nine species tested had significant differences in net photosynthetic rate (Pn), stomatal conductance (gs), and/or relative chlorophyll content between the control and EC 10, and the difference varied with species. Shoot ion concentrations of the nine ornamentals were also affected by salinity levels and varied among species.

APA, Harvard, Vancouver, ISO, and other styles

More sources

Dissertations / Theses on the topic "Dry heather"

1

Uren, Sally Clare. "The effects of wet and dry deposited ammonia on Calluna vulgaris." Thesis, Imperial College London, 1992. http://hdl.handle.net/10044/1/8895.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Nyström, Erika. "Long term restoration effects : Effects of restoration measures on restoration success in nature reserves in acidic fen, buffered fen, dry heather, wet heather, and wet grassland in Drenthe, Netherlands." Thesis, Uppsala universitet, Institutionen för biologisk grundutbildning, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-425223.

Full text

Abstract:

Habitat degradation, fragmentation and loss are important factors causing loss in biodiversity and red listed species, and restoring habitats is essential in preventing this. However, there is a limited knowledge of the long term effects of restoration measures. This study focuses on analysing the long term restoration success of restoration measures carried out in a restoration program between the 1980's and early 2000's in locations of acidic fen, buffered fen, dry heather, wet heather, and wet grassland. The aim of the restoration program was to diminish the effects on ecosystems that were influenced by eutrophication, acidification, and dehydration. The locality species composition and Ellenberg values of nitrogen (EVN), moisture (EVM) and pH levels (EVpH) are analysed, by using previous and current restoration success scores from 54 locations in the province of Drenthe in the Netherlands. The dependence of restoration success score and Ellenberg values on change over time, habitat type, restoration method and EVN, EVM and EVpH are analysed. Restoration success depended on habitat type, with wet heather having significantly higher success compared to wet grasslands. The change in score over time, however, did not vary among habitats. Restoration success did not depend on restoration method(s), nor did change in restoration success. Ellenberg values varied among habitat types, and EVM changed significantly over time in dry heather, but was not significantly related to restoration success score. In conclusion, wet heather was shown to be doing quite well, but could benefit from additional restoration. Acidic fen, buffered fen, dry heather, and wet grassland have all shown poor long term restoration effects, indicating an overall need for further restoration measures. The results also highlight the importance of further studies into the effect of long term restorations, especially focused on finding successful restoration methods, and the importance of detailed data gathered in the field.

APA, Harvard, Vancouver, ISO, and other styles

3

af, Klintberg Tord. "Heated air gaps : a possibility to dry out dampness from building constructions." Licentiate thesis, KTH, Civil and Architectural Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-9490.

Full text

Abstract:

<p>The air gap method is a modification of the common way of building indoor walls and floors. The aim of the method is to make a construction, less fragile to water damage, with air gaps where moisture can be removed with a thermally driven air flow, caused by a heating cable. The thesis includes a number of experimental studies of this method.</p><p>Temperature and convective air flow in a vertical air gap was studied and it was noted how air flow increased with raised power of the heating cable. The air flow for one meter of wall varied between 50 m3/day (13 air changes per hour) and 140 m3/day (36 air changes per hour). The lower value was caused by a temperature difference in the range 0.2-0.3 oC. Without heating no air flow was found.</p><p>In studies of moisture and RH in wet “slab on ground” constructions, it was noted how the slab in the room with the air gap method dried to a much higher extent than the slab in the room built in an ordinary way. It was also noted that moisture was transported from the air gap in the floor and up through the air gap in the wall. In the room with the air gap construction, the RH values beneath the floor was at a lower level (and below 75 % RH) than the RH values beneath the floor of conventional construction. Mould does not grow below 75 % RH.</p><p>In the study of a flooded intermediate floor it was noted how the thermally driven convective air flow evidently speeded up drying of the construction. Mould growth was only noted in the case where the heating cables were turned off.</p><br><p>Spaltmetoden är en modifiering av det reguljära sättet av att bygga innerväggar och bjälklag. Syftet med metoden är att skapa en byggnadskonstruktion som är mindre skör med avseende på fuktskador. Detta görs med spalter där fukt kan avlägsnas genom ett termiskt drivet luftflöde som orsakas av en värmekabel. Denna avhandling innehåller ett antal experimentella studier på metoden. Spaltmetoden har studerats med avseende på 1. Samband mellan temperatur och luftflöde, 2. Uttorkning och RF nivåer i golvkonstruktioner samt 3. Översvämning av ett mellanbjälklag</p><p><strong>1. Samband mellan temperatur och luftflöde</strong></p><p>Temperatur och konvektivt luftflöde har studerats i en vertikal spalt och resultatet visar att luftflödet ökar med ökad effekt hos värmekabeln. Luftflödet i en vägg med en meters bredd varierade mellan 50 kubikmeter/dag (13 luftväxlingar per timme) och 140 kubikmeter/dag (36 luftväxlingar per timme). Det lägre flödet orsakades av en temperaturskillnad på 0,2-0,3 oC mellan luftspalt och rum. När värmekabeln var avstängd så registrerades inget luftflöde.</p><p><strong>2. Uttorkning och RF nivåer i golvkonstruktioner ovan betongplatta</strong></p><p>Detta experiment visade att fukt har transporterats från spalten i golvet genom spalten i väggen ut i rumsluften. I spaltkonstruktion var RF inuti golvkonstruktionen lägre (och understeg 75 % RF), jämfört med den konventionella konstruktionen, (mögel växer inte under 75 % RF). Det har också registrerats att betongplattan som hörde till spaltmetoden torkade ut snabbare än betongplattan som var inbyggd i ett gängse rum.</p><p><strong>3. Översvämning av ett mellanbjälklag</strong></p><p>I studien där ett mellanbjälklag blev översvämmat noterades att spaltmetoden förkortade torktiden från 21 dagar till 13 vid den fuktigaste mätpunkten. Mögelväxt noterades endast då värmekabeln hade varit frånslagen.</p><p> </p><p> </p>

APA, Harvard, Vancouver, ISO, and other styles

4

Rieks, Martin Johannes [Verfasser]. "Dry reforming of CH4 with CO2 in an electrically heated reactor using renewable energy / Martin Johannes Rieks." München : Verlag Dr. Hut, 2017. http://d-nb.info/1147674361/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Pavlo, Matej. "Kotel na spalování hnědého uhlí." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241847.

Full text

Abstract:

The aim of the master’s thesis is thermal calculation and dimensional design of boiler of 235 t/h which burns brown coal. The work is divided into several parts. In the first part, stoichiometric calculation and the calculations enthalpy of flue gases and air are performed. After calculating the heat balance and loss of the boiler, the boiler efficiency is counted. In the next part, thermal calculation of combustion chamber is calculated. Subsequently, design of the individual heating surfaces is proposed. Finally, the overall heat balance of the boiler is inspected. The calculation is supplemented by drawing of the boiler.

APA, Harvard, Vancouver, ISO, and other styles

6

Maunder, Paul Allan. "The Rebellious Mirror,Before and after 1984:Community-based theatre in Aotearoa." Thesis, University of Canterbury. Theatre and Film Studies, 2010. http://hdl.handle.net/10092/5381.

Full text

Abstract:

In this thesis I outline the contribution Community-based theatre has made to New Zealand theatre. This involves a defining of theatre production as a material practice. Community-based theatre was a tendency from the 1930s, a promise of the left theatre movement and, I argue, was being searched for as a form of practice by the avant-garde, experimental practitioners of the 1970s. At the same time, early Māori theatre began as a Community-based practice before moving into the mainstream. With the arrival of neo-liberalism to Aotearoa in 1984, community groups and Community-based theatre could become official providers within the political system. This led to a flowering of practices, which I describe, together with the tensions that arise from being a part of that system. However, neo-liberalism introduced managerial practices into state contracting and patronage policy, which effectively denied this flowering the sustenance deserved. At the same time, these policies commodified mainstream theatre production. In conclusion, I argue that in the current situation of global crisis, Community-based theatre practice has a continuing role to play in giving voice to the multitude and by being a practice of the Common.

APA, Harvard, Vancouver, ISO, and other styles

7

Riesch, Friederike. "Vegetation patterns and processes in semi-natural open habitats and the contribution of wild red deer to their conservation." Doctoral thesis, 2019. http://hdl.handle.net/21.11130/00-1735-0000-0003-C1C5-4.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Books on the topic "Dry heather"

1

Richards, J. N. Habitat guidelines for dry lowland heaths. Oxford Brookes University, 1997.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

2

Bond, Brian. Design and operation of a solar-heated dry kiln for tropical latitudes. Southern Research Station, 2011.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

3

Wengert, Eugene. Solar Heated Lumber Dry Kiln Designs. Vitality Assoc, 1989.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

4

Heath/catch/day. Jove, 1988.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

5

Gemmen, Heather, and Mary McNeil. Win or Lose: Opposites, 1 Samuel 17 (Gemmen, Heather. Rocket Readers. Day By Day.). Faith Kidz, 2004.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

6

Henry, Heather French. What Freedom Means To Me: A Flag Day Story (Henry, Heather French. Claire's Holiday Adventures.). Cubbie Blue, 2004.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

7

My Day at the Baseball Game: A Book About a Special Day (Feldman, Heather L. My World.). PowerKids Press, 2000.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

8

Day, Valentine's Day Valentine's. I Love You Heather Happy Valentine's Day : Composition Notebook: Valentine's Day Gift for an Happy Valentine Day Gratitude Your Lover. Independently Published, 2020.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

9

Lafayllve, Patricia M., and Cat Heath. Elves, Witches and Gods: Spinning Old Heathen Magic in the Modern Day. Llewellyn Publications, 2021.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

10

Heath Mathematics Problem Of The Day Copymasters. 8th ed. D.C. Heath and Company, 1992.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

More sources

Book chapters on the topic "Dry heather"

1

Schieberle, P., and T. Hofmann. "Characterization of Key Odorants in Dry-Heated Cysteine—Carbohydrate Mixtures: Comparison with Aqueous Reaction Systems." In ACS Symposium Series. American Chemical Society, 1998. http://dx.doi.org/10.1021/bk-1998-0705.ch026.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Tikkanen, E., and H. Raitio. "Nutrient Stress in Young Scots Pines Suffering from Needle Loss in a Dry Heath Forest." In Management of Nutrition in Forests under Stress. Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3252-7_24.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Reid, Peter H. "Trial Day Nine." In Every Hill a Burial Place. University Press of Kentucky, 2020. http://dx.doi.org/10.5810/kentucky/9780813179988.003.0030.

Full text

Abstract:

On Sunday, the hearing begins with a heated clash after Effiwat accuses Georgiadis of threatening and intimidating potential witnesses. The judge waives off the accusation, and the trial continues. However, before proceeding, he deals with a new volatile issue as several soldiers with submachine guns are stationed at the back of the courtroom. He orders them to leave. At this point, Dr. Gerald Dockeray, the eminent pathologist from Nairobi, begins his testimony, stating that he had performed a postmortem two days after Peppy’s death. Under Georgiadis’s questioning, Dockeray testifies that he did not believe the injuries could have been caused by either the pipe or the stones, as the prosecution alleged. It was more likely that when Peppy pitched forward, fallen, and a stone had caused the injuries.

APA, Harvard, Vancouver, ISO, and other styles

4

Elabbassi, Elmountacer Billah, Stéphane Delanaud, Karen Chardon, Jean-Pierre Libert, and Victor Candas. "Electrically heated blanket in neonatal care: assessment of the reduction of dry heat loss from a thermal manikin." In Environmental Ergonomics - The Ergonomics of Human Comfort, Health and Performance in the Thermal Environment. Elsevier, 2005. http://dx.doi.org/10.1016/s1572-347x(05)80068-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Bogaard, Paul A. "Examining Whitehead’s ‘First Lecture: September, 1924’." In Whitehead at Harvard, 1924-1925. Edinburgh University Press, 2020. http://dx.doi.org/10.3366/edinburgh/9781474461351.003.0003.

Full text

Abstract:

A quick comparison of Whitehead’s manuscript for his first Harvard lecture and the notes of his Harvard and Radcliffe students reveals that the manuscript does not exactly reflect the lecture that he actually delivered at Harvard on September 25, 1924. Paul Bogaard, the editor of the first year of Whitehead’s Harvard lectures during the academic year 1924-1925, undertakes a thorough examination of the manuscript and the notes of Winthrop Bell and Louise Heath and draws some conclusions which help explain the differences between these different sources. The manuscript was likely a little long to be delivered within the allotted time on the day, and it seems that Whitehead made some adjustments of the fly, including the removal of British anecdotes with which Americans would have been less familiar.

APA, Harvard, Vancouver, ISO, and other styles

6

Long, Paul. "State-sponsored amateurism: cultural intermediation, participation and non‑professional production." In Cultural Intermediaries Connecting Communities. Policy Press, 2019. http://dx.doi.org/10.1332/policypress/9781447344995.003.0005.

Full text

Abstract:

This chapter asks: what roles does participation as production have in cultural intermediation projects? How are individuals afforded agency in the making of cultural works and connected to the cultural ecology, between activities that are publicly funded, commercial and homemade? The chapter proceeds with an exploration of a contemporary injunction to be creative. It then deals with some of the prompts for thinking with the label of amateurism in relation to an understanding of participation and processes of intermediation. Drawing on indicative examples of activity in Balsall Heath is an exploration of a form of ‘sponsored amateurism’, a label describing every day creative work amongst non-professionals engendered by intermediaries and cultural policy. The chapter concludes with reflections on a field of production that falls outside of the obvious attention of policymakers and cultural intermediation objectives.

APA, Harvard, Vancouver, ISO, and other styles

7

Kahn, Richard J. "**C207** Chap. 7th." In Diseases in the District of Maine 1772 - 1820, edited by Richard J. Kahn. Oxford University Press, 2020. http://dx.doi.org/10.1093/med/9780190053253.003.0023.

Full text

Abstract:

After brief comments on Hippocrates, Celsus, Cullen, and others, Barker discusses “the unfortunate [John] Brown,” whose “excentric notions & heated imagination . . . fascinated a considerable number of physicians, both in Europe & America.” About 1788, when Brown’s Elements of Medicine first appeared in Maine to be read by physicians, lawyers, and divines, the lancet and other depleting means were replaced by stimulants, chiefly of spiritous liquors. People with pulmonary consumption seldom consulted physicians, preferring the stimulating plan to the lancet. Physicians also preferred the stimulating plan and rarely used the lancet until 1798, when Dr Rush’s Inquiry into the Causes and Cure of the Pulmonary Consumption, printed in 1793, was brought to Portland and read by Barker and others. But prejudice against the use of the lancet in consumption was strong, and the change didn’t take place until the beginning of the nineteenth century.

APA, Harvard, Vancouver, ISO, and other styles

8

Bradley, Richard. "The New Order." In The Idea of Order. Oxford University Press, 2012. http://dx.doi.org/10.1093/oso/9780199608096.003.0016.

Full text

Abstract:

How would someone who had been brought up in a roundhouse adapt to life in a rectangular world? The experience of a servant working for a family in Malawi shows how difficult it could be. Her predicament is described in a book entitled Women’s Work in Heathen Lands, published in 1886. Jan Deregowski quotes the following extract:… In laying the table there is trouble for the girl. At home her house is round; a straight line and the right angle are unknown to her or her parents before her. Day after day therefore she will lay the cloth with the folds anything but parallel with one edge of the table. Plates, knives and forks are set down in a confusing manner, and it is only after lessons often repeated and much annoyance that she begins to see how things might be done (Laws 1886, quoted by Deregowski 1973: 180–1)… That simple story introduces a larger issue. Under what circumstances did people make the transition from a world of circular structures to one of squares and rectangles, and how were their lives affected by that process? It is surprising how much attention had been paid to structural changes among ancient buildings and how little to the political and social circumstances in which they happened. One way of approaching this topic is not only studying the advantages offered by new styles of architecture, but also asking which important features might be lost. That is too rarely considered. Many of the approaches described in Chapter 2 emphasized the possibilities offered by the change from circular to rectangular buildings. Houses could be larger and could accommodate more people; they would be easier to maintain; they could be expanded as the number of inhabitants increased and space was subdivided; in many cases rectilinear dwellings could be inhabited over longer periods than roundhouses. None of those arguments is unsatisfactory in itself, but all are incomplete because they do not take into account the motives of the people who chose to live there. Chapter 2 also showed how houses could be used to emphasize subtle distinctions among their inhabitants: differences that were based on age, gender, and social standing.

APA, Harvard, Vancouver, ISO, and other styles

9

Hobbie, John E., and Neil Bettez. "Climate Forcing at the Arctic LTER Site." In Climate Variability and Ecosystem Response in Long-Term Ecological Research Sites. Oxford University Press, 2003. http://dx.doi.org/10.1093/oso/9780195150599.003.0011.

Full text

Abstract:

The Arctic LTER site is located at 68º38'N and 149º43'W, at an elevation of 760 m in the northern foothills of the Brooks Range, Alaska. The location, 208 km south of Prudhoe Bay, was chosen for accessibility to the Dalton Highway, which extends along the Trans-Alaska Oil Pipeline from north of Fairbanks to Prudhoe Bay on the Arctic Ocean (figure 5.1). The rolling foothills at the site are covered with low tundra vegetation (Shaver et al. 1986a), which varies from heaths and lichens in dry sites to sedge tussocks on moist hillslopes to sedge wetlands in valley bottoms and along lakes. Riparian zones often have willow thickets up to 2 m in height. Small lakes are frequent; the best studied such lake is the 25-m-deep Toolik Lake (O’Brien 1992), the center of the LTER research site. Some 14 km from Toolik Lake, the Dalton Highway crosses the fourth-order Kuparuk River, the location of much of the LTER stream research (Peterson et al. 1993). Climate records at Toolik Lake have been kept since the early 1970s when a pipeline construction camp was established. On completion of the road in 1975, climate stations were set up by the U.S. Army Cold Regions Research Laboratory (CRREL, climate reported in Haugan 1982 and Haugen and Brown 1980). Since 1987, the LTER project has maintained climate stations at Toolik Lake (http:// ecosystems.mbl.edu/arc/) whereas the Water Resources Center of the University of Alaska has continuous records beginning in 1985 from nearby Imnavait Creek. An automatic station at Imnavait now reports every few hours to the Natural Resources Conservation Service–Alaska of the U.S. Dept. of Agriculture. The characteristics of the climate in northern Alaska are summarized by Zhang et al. (1996), who pointed out the strong influence of the ocean during both summer and winter months. They reported that the mean annual air temperature is coldest at the coast (–12.4ºC), where there are strong temperature inversions in the winter, and warmest in the foothills (–8.0ºC). At Toolik Lake, snow covers the ground for about eight months, and some 40% of the total precipitation of 250–350 mm falls as snow.

APA, Harvard, Vancouver, ISO, and other styles

10

Huhtinen, Aki-Mauri, Arto Hirvelä, and Tommi Kangasmaa. "The Opportunities of National Cyber Strategy and Social Media in the Rhizome Networks." In Cyber Law, Privacy, and Security. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-8897-9.ch043.

Full text

Abstract:

Securing the society is a central task of the state. In the present day, as well as in the future, knowledge and information are evermore closely tied to electronic data transfer. Finland's newly published Cyber Security Strategy depicts how the government safeguards electronic data transfer, that is, information security against different threat and risk scenarios. Cyberspace has a human element and a technological element. It is a way to influence and affect society. It may be used to influence minds or to attack the physical world, for example by disrupting traffic control. But cyberspace cannot exist without people. The cyberspace offers the platform so called strategic communication. Strategic communication is a concept that unites the efforts of governmental organisations to influence people in support of national interests. Formal organisations and institutions are often seen as being opposed or resistant to change. Social Media and the cyber domain can offer many opportunities but also unknown threats and risks. In this paper we argue that securing an organisation is a living and continuously changing process. Deleuze and Guattari (1983) present the concept of a rhizome, meaning a dynamic weed formation which, opposed to the arboreal and hierarchical structure of the tree, involves spontaneous, unpredictable and distant connections between heterogeneous elements (Linstead & Thanem 2007, 1484) Strategic Communication is the focus of a heated discussion in the military field: How can militaries be credible and uphold the high standards of democracy within the asymmetric and complex battlefield? To be credible one must act according to what is said. The challenge is that the scene is global in the information age. The act, the actor, the scene, the purpose – all are exposed to a global audience through cyberspace on a very short notice. The most effective way of showing the scene and actors is an audiovisual product. Examples of this come from all conflict zones. Militaries are establishing Youtube channels and supplying material from intense fighting and frontline action. The solution for supporting the organisation's own arguments has been the Combat Camera capability, in other words media-trained soldiers who are where the main effort is happening. Within the spirit of strategic communication, the cyber strategy itself is one way to operationalise cyber security by announcing measures to be taken against cyber attacks. In this article the authors reflect on the Finnish Cyber Strategy and Strategic Communications from a phenomenological perspective.

APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Dry heather"

1

Sobhansarbandi, Sarvenaz, Patricia M. Martinez, Alexios Papadimitratos, Anvar Zakhidov, and Fatemeh Hassanipour. "Solar Thermal Collector With Multifunctional Absorber Layers." In ASME 2017 Power Conference Joint With ICOPE-17 collocated with the ASME 2017 11th International Conference on Energy Sustainability, the ASME 2017 15th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2017 Nuclear Forum. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/power-icope2017-3545.

Full text

Abstract:

Solar water heaters (SWHs) are a well-established renewable energy technology that have been widely adopted around the world. In this study we have significantly improved the Evacuated Tube solar Collectors (ETCs) by utilizing the “dry-drawable” Carbon Nanotube (CNT) sheet coatings to increase the solar energy absorption and Phase Change Materials (PCMs) to increase the heat accumulation for application in solar water heaters. The proposed solar collector utilizes a phase change material namely Octadecane paraffin, with melting temperatures of 28°C which is categorized as non-toxic with long-term chemical stability PCM. As PCMs particularly in powder form may not be effective by itself due to the poor heat transfer rate, low thermal diffusivity and thermal conductivity, by combining CNT layers with the high thermal diffusivity and thermal conductivity compare to phase change materials, we are able to overcome the shortcomings of PCMs and design an innovative and efficient solar water heater. With the current technology, we can provide a near ideal black body surface, absorbing a maximum of 98%, between 600–1100 nm, of solar light striking the surface, and providing additional spectral absorption which improves the performance of the solar heater. Applying CNT sheets in conjunction with PCM enables heat storage directly on the collector for a more constant output, even on a cloudy day and prolonged output of heat at night.

APA, Harvard, Vancouver, ISO, and other styles

2

Guntur, Krishna, R. S. Amano, and Brinda Athreya. "Uniform Heating Device for a Paper Mill Process." In ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/detc2009-87419.

Full text

Abstract:

Paper mills use elaborated drying process using hot rollers to dry the paper. In the recent past, use of hot air for drying has gained some interest. The main disadvantage of this method is non-uniform air temperature, which will cause lateral shrinkage of the paper. This paper discusses a new drying system. The process incorporates a porous medium to ensure uniform temperature by flattening the velocity distribution. The new system requires less equipment pieces and utilized less space for the drying process. A cloth is used in place of paper to increase the repeatability of the experiment. This experiment utilized a conveyor system to transport the cloth within the heater section. Variables concerning velocity and temperature values of the heated air, and heater intensity were adjusted to produce the different drying conditions. Forced air propane heater was used as the heat source. Design modifications were made so that the heater is more suitable for this process. The results showed significant improvement of the velocity and feasibility of extending this technology to the actual scale.

APA, Harvard, Vancouver, ISO, and other styles

3

Ohtake, Hiroyasu, Yasuo Koizumi, Ken Nemoto, and Hisashi Sakurai. "Spot Cooling of Local-High Heat Load by High-Velocity Thin Liquid Flow." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-15074.

Full text

Abstract:

Spot cooling of local-high heat load by high-velocity thin liquid flow was examined experimentally. Steady state experiments were conducted using a copper thin-film and rectangular sub-millimeter-channels. The width of the test channel was 2 mm. The heights of the test channel were 0.5 and 0.2 mm. The width and length of a test heater was 2 mm and 2 mm, respectively. The test liquid was degassed pure water. The liquid velocities were 1.5, 5, 10 and 15 m/s. The liquid subcooling was 20 K. Location of the heater in the test channel also was an experimental parameter: the positions of the heater from the exit of the test channel were 30 mm (middle) and 0 mm (exit). Experimental results showed that the maximum heat flux (CHF or cooling limit) during experiment with the heater at exit of the test channel was similar to that with the heater at middle of the test channel: the maximum heat flux was independent of the position of heater in the test channel. The maximum heat flux occurred when bubbles coalesced together or a dry patch appeared on the heater. The coalescence bubble covered over the heater was observed at CHF in condition of low liquid velocity. For condition of high liquid velocity, a dry patch appeared on the heater, and then the dry region extended over the heater to come around the CHF. The maximum heat flux (critical heat flux) was about 8 MW/m2 in a range of present experiments. The CHF for the present sub-millimeter channel was similar to that for conventional channel. Furthermore, models were proposed using heat transfer around a coalesced bubble and at a dry patch on a heater.

APA, Harvard, Vancouver, ISO, and other styles

4

Bohaichuk, Stephanie, Miguel Munoz Rojo, Gregory Pitner, et al. "Low Power Nanoscale Switching of VO2using Carbon Nanotube Heaters." In 2018 76th Device Research Conference (DRC). IEEE, 2018. http://dx.doi.org/10.1109/drc.2018.8442223.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Byun, Ikjoo, Ryohei Ueno, and Beomjoon Kim. "Fabrication of micro-heaters embedded in PDMS using a dry peel-off process." In 2014 IEEE 27th International Conference on Micro Electro Mechanical Systems (MEMS). IEEE, 2014. http://dx.doi.org/10.1109/memsys.2014.6765690.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Katcher, Kelsi M., and Dereje Amogne. "Impact of Dry Cooler Air-Side Performance on a sCO2 Power Cycle for a CSP Application." In ASME Turbo Expo 2021: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/gt2021-59936.

Full text

Abstract:

Abstract Uncertainty around the design and control of the supercritical CO2 power cycle must be reduced before this technology can be implemented for large-scale grid support. To better understand the day-to-day performance of an sCO2 cycle, off-design performance calculations must be included for all power block components, and performance assumptions must be removed. This study has expanded the modeled scope to include the air-side performance for the dry cooler and has incorporated discretized heat transfer calculations for both streams through the pre-cooler to better predict off-design performance. This study considered a recompression Brayton cycle in a concentrating solar power application. The cycle model utilized fixed sCO2 turbomachinery maps for the main compressor, recompressor, and expander operating to supply approximately 10 MW gross at the design point. Fixed vendor-supplied fan curves were used to calculate the air-side performance of the dry cooler. The primary heater was modeled considering both the sCO2 and heat transfer fluid streams. Off-design performance was predicted for an ambient temperature range of 0–55°C, a HTF temperature range of 705–735°C, and a HTF mass flow range of 50–105% of the design point value. To understand the importance of modeling the air-side performance, the cycle off-design performance was also calculated using a constant CO2 outlet temperature assumption and a constant approach temperature assumption for the dry cooler. Results show that using these assumptions can significantly alter the power output and cycle efficiency predictions.

APA, Harvard, Vancouver, ISO, and other styles

7

Abramson, S. B., J. Yang, E. D. Gomperts, C. K. Kasper, and E. J. Fedor. "RELATIVE THERAPEUTIC EFFICACY AND MOLECULAR WEIGHT DISTRIBUTION OF DRY-HEATED AND n-HEPTANE-HEATED PREPARATIONS OF FACTOR VIII." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1643920.

Full text

Abstract:

Recent reports by Kemoff et al. (1985) and Gomperts et al. (1987; a multicentered multinational trial) showed that Factor VIII (Antihemophilic Factor, or AHF) “wet” heat-treated in n-hep-tane (Profilate Heat-TreatedR) presented a lower risk of transmitting non-A, non-B hepatitis and HIV than AHF products heated as lyophilized powders. No direct comparison has been reported, however, of the therapeutic efficacy of these products. We compared recovery and half-life in vivo for Profilate Heat-Treated11 with those of the dry-heated products HT ProfilateR and Koate HTR. Two sets of six subjects with severe hemophilia A were infused with either Profilate Heat-TreatedR or a dry-heated AHF in a crossover trial, and blood samples were drawn at times from 10 min to 24 hr. Half-life was determined from a linear regression plot of log (plasma AHF) vs. time from 1 hr to 24 hr. The table gives the mean ± one standard deviation of initial recovery and half-life for each product comparison. Unpaired t-tests showed no significant differences between products. Spearman’s rank analysis showed a high degree of correlation for both the initial recovery and half-life of each product pair.Analysis of molecular weight (MW) distributions of Factor VIII:C polypeptides in several commercial products using the method of Weinstein showed the majority of AHF in all products tested to have MW = 100,000 - 110,000. H.T. FactorateR, which exhibited a substantial amount of the AHF polypeptide whose MW approximates 210,000, is reported by the manufacturer to have a half-life = 11 ± 3.9 hr. We thus conclude that the 210,000 MW form of AHF is not required for therapeutic efficacy.

APA, Harvard, Vancouver, ISO, and other styles

8

Liao, Albert, Feng Xiong, Kristof Darmawikarta, John Abelson, and Eric Pop. "Chalcogenide phase change induced with single-wall carbon nanotube heaters." In 2009 67th Annual Device Research Conference (DRC). IEEE, 2009. http://dx.doi.org/10.1109/drc.2009.5354846.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Qin, Feng, Kevin Chou, Dustin Nolen, and Raymond Thompson. "Chip Clogging in Dry Drilling: Workpiece Temperature Effects." In ASME/STLE 2009 International Joint Tribology Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/ijtc2009-15071.

Full text

Abstract:

This study investigates the chip clogging phenomenon which occurs in dry drilling of aluminum alloys and composites, and yet, is seemingly critical to the drill life. This issue must be resolved in order to facilitate dry drilling. A highspeed dry drilling test using common twist drills was conducted with the workpiece temperature pre-heated to a wide range, room to 265 °C. The drills after testing were then examined in terms of aluminum residue that strongly adheres with the flute surfaces. A possible transition temperature range that may result in severe aluminum build-up and chip clogging was identified under the tested condition.

APA, Harvard, Vancouver, ISO, and other styles

10

Stosic, Zoran V., and Vladimir D. Stevanovic. "Multi-Dimensional Numerical Simulation of Burnout on Horizontal Surface in Pool Boiling." In ASME 2002 Joint U.S.-European Fluids Engineering Division Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/fedsm2002-31367.

Full text

Abstract:

Multidimensional numerical simulation of the atmospheric saturated pool boiling is performed under high heat fluxes, near to and at the occurrence of burnout conditions. Heat flux through the vessel bottom wall is varied and its influence on the pool boiling dynamics is analysed. Dynamics of vapour generation on the heating wall is modelled through the density of nucleation sites and the bubble residence time on the wall. The nucleation sites are determined by a random function. The applied numerical grid is able to represent the nucleation sites on the heating wall for both fresh (polished) and aged (rough) heaters at the atmospheric pool boiling conditions. Results are presented for short time period after the initiation of heat supply and vapour generation on the heating surface, as well as for quasi steady-state conditions after two seconds from pool boiling initiation. The results show a replenishment of the heating surface with water and partial surface wetting for lower heat fluxes, while heating surface dry-out is predicted for high heat fluxes. The influence of the density of nucleation sites and the bubble residence time on the wall on the pool boiling dynamics is investigated. Numerical simulations show that decrease of the density of nucleation sites and increase of bubble residence time on the heating surface (characteristics pertinent to fresh-polished heaters) lead to the reduction of critical heat flux values. Obtained results are in excellent agreement with the recent experimental investigations of the upward facing burnout conditions on the horizontal heated plate. Details of the developed numerical procedure are presented. The introduced method of random spatial and temporal generation of the vapour at the heated wall is a new approach. It enables the macroscopic representation of the population of microscopic vapour bubbles, which are generated at nucleation sites on the heater wall, and which burst through liquid micro-layer in thermal-hydraulic conditions close to the burnout. The applied numerical and modelling method has shown robustness by allowing stable calculations for wide ranges of applied modelling boiling parameters (density of nucleation sites and bubble residence time).

APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Dry heather"

1

Hoeschele, Marc, and Matthew Seitzler. Summer Indoor Heat Pump Water Heater Evaluation in a Hot-Dry Climate. Office of Scientific and Technical Information (OSTI), 2017. http://dx.doi.org/10.2172/1362145.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Hoeschele, Marc, and Matthew Seitzler. Summer Indoor Heat Pump Water Heater Evaluation in a Hot-Dry Climate. Office of Scientific and Technical Information (OSTI), 2017. http://dx.doi.org/10.2172/1358536.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Bond, Brian, Omar Espinoza, and Philip Araman. Design and operation of a solar-heated dry kiln for tropical latitudes. U.S. Department of Agriculture, Forest Service, Southern Research Station, 2011. http://dx.doi.org/10.2737/srs-gtr-134.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Bond, Brian, Omar Espinoza, and Philip Araman. Design and operation of a solar-heated dry kiln for tropical latitudes. U.S. Department of Agriculture, Forest Service, Southern Research Station, 2011. http://dx.doi.org/10.2737/srs-gtr-134.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Adair, Carol, Heather Darby, Tyler Goeschel, Lindsay Barbieri, and Alissa White. Evaluating Greenhouse Gas Emissions in Promising Tillage and Manure Application Practices at Borderview Farm. USDA Northeast Climate Hub, 2017. http://dx.doi.org/10.32747/2017.6957453.ch.

Full text

Abstract:

A research team at UVM, led by Dr. Carol Adair and Dr. Heather Darby, is evaluating the benefits and drawbacks of four different tillage approaches (conventional, strip, vertical, and no till) and two different methods of manure application (broadcast and injection). The goal is to determine the practices best suited for reducing greenhouse gas emission, improving carbon storage and limiting nitrogen losses. The team measures carbon dioxide and nitrous oxide emissions from the treatments every two weeks or more frequently after events (large rainfall, manure application) using a measuring device called photoacoustic multigas monitor.

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!