Journal articles on the topic 'Reedy Creek'
To see the other types of publications on this topic, follow the link: Reedy Creek.
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 journal articles for your research on the topic 'Reedy Creek.'
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.
Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.
1
Parece, Tammy E., and Helen Ruth Aspaas. "Reedy Creek Cleanup: The Evolution of a University Geography Service-Learning Project." Journal of Geography 106, no. 4 (November 2007): 153–61. http://dx.doi.org/10.1080/00221340701658794.
Full text
2
MacFarlane, Alexander, Kelly Saikkonen, and Ted McKim. "A Holistic Approach to Organics Co-Digestion: Harvest Power Orlando at Reedy Creek Improvement District." Proceedings of the Water Environment Federation 2014, no. 9 (October 1, 2014): 4538–49. http://dx.doi.org/10.2175/193864714815941090.
Full text
3
Makarynskyy, О., and D. Makarynska. "Long-term natural flow regime (spells) analysis for water treatment discharges." Ukrainian hydrometeorological journal, no. 24 (December 9, 2019): 72–82. http://dx.doi.org/10.31481/uhmj.24.2019.07.
Full textAbstract:
Conducting mineral extraction activities usually requires obtaining a set of permits for each of the activities planned to be undertaken. This directly concerns water management and discharges associated with any mineral extraction operations. In response to the growing demand for energy resources worldwide, the industry demand for permits relating to the extraction of coal seam (and shale) gas also increased dramatically. This was in turn accompanied by the growing community concerns in regard to fracking and wastewater management practices.
To address these concerns, the state governments in Australia developed a strict framework and guidelines for the permit application process and provided terms of reference for the environmental impact assessments, where required. In accord with the guidelines, a liquefied natural gas mining operator was conducting a research to assess several facets of water releases from Reedy Creek Water Treatment Facility to Yuleba Creek in Queensland. The scope for the research was developed in line with such guidelines and included estimating the downstream extents of flows from several Water Treatment Facility discharge volumes over a period of planned discharges. More specifically, the purpose of the study presented in this paper was to assess flows in Yuleba Creek before and after the proposed releases of treated water from the Reedy Creek Water Treatment Facility, and how the planned change to flow parameters would satisfy the regulatory guidelines. The assessment was based on 41 years of data collected at the Forestry Station gauge.
An analysis of the obtained results suggested that the historical maximum was 25,825 ML/d. An analysis of the median flows suggested that the years 1983, 1999, and 2010-2012 had the highest medians of around 15 ML/d, 10 ML/d, and from 9 ML/d to 12 ML/d respectively. The median flow values would exceed from 0.09 ML/d to 0.69 ML/d flows during the months of February and March only. The lowest 90th percentile flows were obtained for the months from April through to October. The highest flow estimates would be in the months from November through to March. An analysis of the flow duration curves suggested that the annually averaged flow of 0.08 ML/d in the Yuleba Creek would be present for around 48% of the time. Flows predictabilities were calculated; for the baseline flow records, the value of predictability was 0.50, and the constancy/predictability ratio was 0.89. The rates of streamflow rise and fall were estimated and analysed. The results suggested that the rate of streamflow rise varied within a range from 0.0 up to 320.0 ML/d per day. The rates of streamflow fall was up to 15.0 ML/d per day.
4
Crist, Anthony. "Reedy Creek, the Project Unique: A Unique Situation with Multiple Peculiar Challenges Leading to an Innovative Solution." Proceedings of the Water Environment Federation 2016, no. 4 (January 1, 2016): 633–58. http://dx.doi.org/10.2175/193864716821124782.
Full text
5
Ayivi, Frederick, and Manoj K. Jha. "Estimation of water balance and water yield in the Reedy Fork-Buffalo Creek Watershed in North Carolina using SWAT." International Soil and Water Conservation Research 6, no. 3 (September 2018): 203–13. http://dx.doi.org/10.1016/j.iswcr.2018.03.007.
Full text
6
Churchill, R. C., C. E. Meathrel, and P. J. Suter. "A retrospective assessment of gold mining in the Reedy Creek sub-catchment, northeast Victoria, Australia: residual mercury contamination 100 years later." Environmental Pollution 132, no. 2 (November 2004): 355–63. http://dx.doi.org/10.1016/j.envpol.2004.03.001.
Full text
7
Dangerfield, P. C., and A. D. Austin. "Biology of Mesostoa kerri (Insecta: Hymenoptera: Braconidae: Mesostoinae), an Endemic Australian Wasp that Causes Stem Galls on Banksia marginata." Australian Journal of Botany 46, no. 4 (1998): 559. http://dx.doi.org/10.1071/bt97042.
Full textAbstract:
The biology of Mesostoa kerri Austin & Wharton, amember of the endemic Australian subfamily Mesostoinae, was investigated inthe laboratory and at the only known field site at Reedy Creek, SouthAustralia, where it causes stem galls onBanksia marginata Cav. Galls vary in shape fromspherical to elongate, with larger elongate galls appearing to inhibit distalfoliage growth. Their internal structure is characterised by a large number ofchambers occupied by wasp larvae, a melanised cambial layer, and partialdisruption and proliferation of xylem tissue. Larvae were observed to feeddirectly on the walls of their chambers. There is a direct relationshipbetween the size of galls and number of resident wasps, with the largest gallscontaining up to 300 individuals. Total wasps dissected from galls had a sexratio close to 1 : 1, although the ratio varied among galls from strongly maleto strongly female biased. Females are sluggish in behaviour and have not beenobserved to fly. They oviposit into preapical green stems and the pattern ofoviposition may determine the shape and size of the resultant gall. Male waspsemerge just prior to females and probably wait on galls for females to emergebefore mating. A number of factors, including the absence of early-stage gallsand substantial foliage growth distal to some galls inSeptember–October, indicates that M. kerri has anannual life cycle. Other gall residents occurred in 57% of sampledgalls, and included 11 species of Hymenoptera, 3 of Coleoptera and 1 ofLepidoptera. Data available for other Mesostoinae suggest thatBanksia is the exclusive host group and all species aregall formers.
8
Gauterin, Frank, Jaroslaw Grochowicz, Michael Haverkamp, Holger Marschner, Johann Pankau, and Marian Rostek. "Creep groan — phenomenology and remedy." ATZ worldwide 106, no. 7-8 (July 2004): 15–18. http://dx.doi.org/10.1007/bf03225301.
Full text
9
Xiao, Liang Li, Ming Yang Pan, and Meng Chen. "Estimating on Creep Strain for Ready-Mixed Concrete during Shrinkage." Applied Mechanics and Materials 357-360 (August 2013): 684–88. http://dx.doi.org/10.4028/www.scientific.net/amm.357-360.684.
Full textAbstract:
This paper presents the development of formulas to estimate the creep strain of the reinforced concrete specimens. The experimental part of the work focused on the dispersion of shrinkage strain between reinforced concrete and plain concrete specimens, as well as the equilibrium condition between concrete tension and reinforcement compression. Based upon the experimental data and development formula, the creep strain and concrete age curves of the reinforced concrete specimens are drawn. Moreover, the characteristics of the creep strain are analyzed in detail. The creep strain formula can provide the important data and theoretic basis to “the code for design of concrete structures”（GB50010－2010）.
10
Park, Yeong-Seong, Yong-Hak Lee, and Youngwhan Lee. "Description of Concrete Creep under Time-Varying Stress Using Parallel Creep Curve." Advances in Materials Science and Engineering 2016 (2016): 1–13. http://dx.doi.org/10.1155/2016/9370514.
Full textAbstract:
An incremental format of creep model was presented to take account of the development of concrete creep due to loading at different ages. The formulation was attained by introducing a horizontal parallel assumption of creep curves and combining it with the vertical parallel creep curve of the rate of creep method to remedy the disadvantage of the rate of creep method that significantly underestimates the amount of creep strain, regardless of its simple format. Two creep curves were combined by introducing an ageing parameter whose value was obtained from two sets of time-dependent laboratory experiments on cylindrical specimens. The presented creep description takes the advantage that a single creep curve due to the initial loading describes the entire development of creep under the persistent change of creep-causing stress. Further, the creep formulation takes advantage of being consistent with the incremental format of age-dependent constitutive formulation. The performance of the presented creep equation was investigated with time-dependent laboratory experiments on cylindrical specimens and compared with the performances of four existing creep models.
11
MOSS, A. L. H., and G. FOUCHER. "Syndactyly: Can Web Creep be avoided?" Journal of Hand Surgery 15, no. 2 (April 1990): 193–200. http://dx.doi.org/10.1016/0266-7681_90_90124-m.
Full textAbstract:
Syndactyly is one of the most common congenital hand deformities but there still remains a high incidence of contractures and web creep after attempts at surgical correction using many assorted techniques. Little attention has been paid to the potential junctional scar in the aetiology of web creep. To remedy this, a technique is described which involves a dorsal flap and two palmar laterally-based flaps. This method not only breaks up the palmar junctional scar but also completely reconstructs the web, not just the floor. The procedure can be used in all varieties of syndactyly and has reduced the incidence of creep in a series of 49 webs.
12
George, R. Y., G. Bodnar, S. L. Gerlach, and R. M. Nelson. "Buffer zones promoting oligotrophication in golf course runoffs: fiddler crabs as estuarine health indicators." Water Science and Technology 44, no. 11-12 (December 1, 2001): 591–98. http://dx.doi.org/10.2166/wst.2001.0885.
Full textAbstract:
Nitrogen pollution above a threshold level induces a eutrophication process in coastal creek ecosystems and consequently impacts on the water quality. The remedy for this scenario is the introduction of methods to enhance oligotrophication by means of constructed wetlands and buffer zones. This paper discusses new data on nitrogen flux and population changes in the primary consumers in the Bradley Creek ecosystem, adjacent to the Duck Haven Golf Course in southeastern North Carolina. In 1998-99, over different seasons, density distribution of the field populations of the fiddler crab Uca minax, was monitored as an indicator of environmental health. A control site at Whiskey Creek, adjacent to the University Center for Marine Sciences, was monitored in the same period since this site is not influenced by any golf course nutrient flux. The results pointed out that threshold level for optimum population density in Spartina grandiflora salt marsh is 0.1 mg/L of nitrates. A dense crab population, adjacent to the golf course with a buffer zone, was indicative of restoration of the estuarine ecosystem. A model, involving the use of constructed wetlands for oligotrophication, is being prepared on the basis of studies conducted by the University of South Alabama for a stormwater wetland constructed adjacent to the university's golf course.
13
An, Li Li, Qiang Xu, Zhong Yu Lu, and Dong Lai Xu. "Analyzing the Characteristics of the Cavity Nucleation, Growth and Coalescence Mechanism of 9Cr-1Mo-VNb Steel (P91) Steel." Advanced Materials Research 744 (August 2013): 412–16. http://dx.doi.org/10.4028/www.scientific.net/amr.744.412.
Full textAbstract:
Creep damage is one of the serious problems for the high temperature industries and computational approach (such as continuum damage mechanics) has been developed and used, complementary to the experimental approach, to assist safe operation. However, there are no ready creep damage constitutive equations to be used for predicting the lifetime for this type of alloy, particularly for low stress. This paper presents an analysis of the cavity nucleation, growth and coalescence mechanism of 9Cr-1Mo-VNb steel (P91 type) under high and low stress levels and multi-axial stress state.
14
Lama, Giuseppe Francesco Cesare, Matteo Rillo Migliorini Giovannini, Alessandro Errico, Sajjad Mirzaei, Roberta Padulano, Giovanni Battista Chirico, and Federico Preti. "Hydraulic Efficiency of Green-Blue Flood Control Scenarios for Vegetated Rivers: 1D and 2D Unsteady Simulations." Water 13, no. 19 (September 23, 2021): 2620. http://dx.doi.org/10.3390/w13192620.
Full textAbstract:
Flood hazard mitigation in urban areas crossed by vegetated flows can be achieved through two distinct approaches, based on structural and eco-friendly solutions, referred to as grey and green–blue engineering scenarios, respectively; this one is often based on best management practices (BMP) and low-impact developments (LID). In this study, the hydraulic efficiency of two green–blue scenarios in reducing flood hazards of an urban area crossed by a vegetated river located in Central Tuscany (Italy), named Morra Creek, were evaluated for a return period of 200 years, by analyzing the flooding outcomes of 1D and 2D unsteady hydraulic simulations. In the first scenario, the impact of a diffuse effect of flood peak reduction along Morra Creek was assessed by considering an overall real-scale growth of common reed beds. In the second scenario, riverine vegetation along Morra Creek was preserved, while flood hazard was mitigated using a single vegetated flood control area. This study demonstrates well the benefits of employing green–blue solutions for reducing flood hazards in vegetated rivers intersecting agro-forestry and urban areas while preserving their riverine ecosystems. It emerged that the first scenario is a valuable alternative to the more impacting second scenario, given the presence of flood control areas.
15
Ekpe, Asuquo Idopise Abasi, and Essien-Ibok Mandu Asikpo. "Trophic Ecology of the Reed Fish, Erpetoicthys calabaricus from a Niger Delta Creek, Nigeria." Asian Journal of Biological Sciences 12, no. 3 (June 15, 2019): 543–49. http://dx.doi.org/10.3923/ajbs.2019.543.549.
Full text
16
Mathis, Maximilian, Dennis Vollberg, Matthäus Langosch, Dirk Göttel, Angela Lellig, and Günter Schultes. "Creep adjustment of strain gauges based on granular NiCr-carbon thin films." Journal of Sensors and Sensor Systems 10, no. 1 (March 12, 2021): 53–61. http://dx.doi.org/10.5194/jsss-10-53-2021.
Full textAbstract:
Abstract. An important property of high-precision mechanical sensors such as force transducers or torque sensors is the so-called creep error. It is defined as the signal deviation over time at a constant load. Since this signal deviation results in a reduced accuracy of the sensor, it is beneficial to minimize the creep error. Many of these sensors consist of a metallic spring element and strain gauges. In order to realize a sensor with a creep error of almost zero, it is necessary to compensate for the creep behavior of the metallic spring element. This can be achieved by creep adjustment of the used strain gauges. Unlike standard metal foil strain gauges with a gauge factor of 2, a type of strain gauges based on sputter-deposited NiCr-carbon thin films on polymer substrates offers the advantage of an improved gauge factor of about 10. However, for this type of strain gauge, creep adjustment by customary methods is not possible. In order to remedy this disadvantage, a thorough creep analysis is carried out. Five major influences on the creep error of force transducers equipped with NiCr-carbon thin-film strain gauges are examined, namely, the material creep of the metallic spring element (1), the creep (relaxation) of the polymer substrate (2), the composition of the thin film (3), the strain transfer to the thin film (4), and the kind of strain field on the surface of the transducer (5). Consequently, we present two applicable methods for creep adjustment of NiCr-carbon thin- film strain gauges. The first method addresses the intrinsic creep behavior of the thin film by a modification of the film composition. With increasing Cr content (at the expense of Ni, the intrinsic negative creep error can be shifted towards zero. The second method is not based on the thin film itself but rather on a modification of the strain transfer from the polyimide carrier to the thin film. This is achieved by controlled cutting of well-defined deep trenches into the polymer substrate via a picosecond laser.
17
Gamnitzer, Peter, Andreas Brugger, Martin Drexel, and Günter Hofstetter. "Modelling of Coupled Shrinkage and Creep in Multiphase Formulations for Hardening Concrete." Materials 12, no. 11 (May 29, 2019): 1745. http://dx.doi.org/10.3390/ma12111745.
Full textAbstract:
The durability and serviceability of concrete structures is influenced by both the early-age behavior of concrete as well as its long-term response in terms of shrinkage and creep. Hygro-thermo-chemo-mechanical models, as they are used in the present publication, offer the possibility to consistently model the behavior of concrete from the first hours to several years. However, shortcomings of the formulation based on effective stress, which is usually employed in such multiphase models, were identified. As a remedy, two alternative formulations with a different coupling of shrinkage and creep are proposed in the present publication. Both assume viscous flow creep to be driven by total stress instead of effective stress, while viscoelastic creep is driven either by total or effective stress. Therefore, in contrast to the formulation based on effective stress, they predict a limit value for shrinkage as observed in long-term drying shrinkage tests. Shrinkage parameters for the new formulations are calibrated based on drying shrinkage data obtained from thin slices. The calibration process is straightforward for the new formulations since they decouple shrinkage and viscous flow creep. The different formulations are compared using results from shrinkage tests on sealed and unsealed cylindrical specimens. Shrinkage strain predictions are significantly improved by the new formulations.
18
Teegavarapu, Ramesh S. V. "Exploring geometrical patterns in streamflow time series: utility for forecasting?" Hydrology Research 49, no. 6 (April 23, 2018): 1724–39. http://dx.doi.org/10.2166/nh.2018.127.
Full textAbstract:
Abstract Streamflow time series often provide valuable insights into the underlying physical processes that govern responses of any watershed to storm events. Patterns derived from time series based on repeated structures within these series can be beneficial for developing new or improved data-driven forecasting models. Data-driven models, artificial neural networks (ANN), are developed in the current study for streamflow prediction using input structures that are classified by geometrically similar patterns. A new modular and integrated ANN architecture that combines multiple ANN models, referred to as pattern-classified neural network (PCNN), is proposed, developed and investigated in this study. The PCNN relies on the development of several independent local models instead of one global data-driven prediction model. The PCNN models are evaluated for one step-ahead prediction of daily streamflows for Reed Creek and Little River, Virginia, and Elkhorn Creek, Kentucky in the United States. Results obtained from this study suggest that the use of these patterns has improved the performance of the neural networks in prediction. The improved performance of the PCNN models can be attributed to prior classification of data benefiting generalization abilities. PCNN model outputs can also provide an ensemble of forecasts that help quantify forecast uncertainty.
19
Powell, Brian A., Lara D. Hughes, Aurelie M. Soreefan, Deborah Falta, Michael Wall, and Timothy A. DeVol. "Elevated concentrations of primordial radionuclides in sediments from the Reedy River and surrounding creeks in Simpsonville, South Carolina." Journal of Environmental Radioactivity 94, no. 3 (May 2007): 121–28. http://dx.doi.org/10.1016/j.jenvrad.2006.12.013.
Full text
20
Hudson, Alan, Jenny Vincent, Ray Wilks, and Ronald Drabman. "“Beat the Buzzer” for Early Morning Dawdling: Two Case Illustrations." Behaviour Change 2, no. 2 (June 1985): 136–42. http://dx.doi.org/10.1017/s0813483900008950.
Full textAbstract:
Many parents experience considerable difficulty in getting their children ready for school or kindergarten in the morning. The “Beat the Buzzer” procedure described by Drabman and Creed on (1979) has been used extensively by clinicians to eliminate morning confrontations between parents and their children. The steps to be followed in the use of the procedure are outlined, and two case studies illustrating modification to the basic procedure are presented. Finally, discussion is given to issues that need to be considered when using the procedure and suggestions for further research evaluations are made.
21
Kingsley, Ronald F. "Chestnut Grove: An Early 19th-Century Lime Burning Industry in the Connecticut Western Reserve." North American Archaeologist 14, no. 1 (July 1993): 71–85. http://dx.doi.org/10.2190/vg8m-7fna-mge0-dyry.
Full textAbstract:
Information is limited regarding the development of early industries along Lake Erie's northeastern shore of the Connecticut Western Reserve. With the opening of the Ohio Country, farmers and pioneer industrialists found the virgin land abundant with natural resources and ready to be exploited. Evidence derived from a rescue excavation of a stone structure at the outlet of the Cowles Creek together with documents established the presence of a lime burning industry. Early settlers found a plentiful wood supply located on the mainland which provided the necessary fuel for burning limestone mined on Cunningham (Kelleys) Island and permitted the construction of shops for use on Lake Erie. Some of the ships that were constructed locally were used to transport lime for the industry. The Sandusky Bay Islands eventually became a rich source of limestone for the expanding American consumer market.
22
Powell, Adrian R., Joseph J. Sumakeris, Yuri Khlebnikov, Michael J. Paisley, R. T. Leonard, Eugene Deyneka, Sumit Gangwal, et al. "Bulk Growth of Large Area SiC Crystals." Materials Science Forum 858 (May 2016): 5–10. http://dx.doi.org/10.4028/www.scientific.net/msf.858.5.
Full textAbstract:
The growth of large diameter silicon carbide (SiC) crystals produced by the physical vapor transport (PVT) method is outlined. Methods to increase the crystal diameters, and to turn these large diameter crystals into substrates that are ready for the epitaxial growth of SiC or other non homogeneous epitaxial layers are discussed. We review the present status of 150 mm and 200 mm substrate quality at Cree, Inc. in terms of crystallinity, dislocation density as well as the final substrate surface quality.
23
Kennard, Olga, and William N. Hunter. "Oligonucleotide structure: a decade of results from single crystal X-ray diffraction studies." Quarterly Reviews of Biophysics 22, no. 3 (August 1989): 327–79. http://dx.doi.org/10.1017/s0033583500002997.
Full textAbstract:
Writing a review gives authors a splendid opportunity to view developments in a particular area of science from a very personal angle. They are at liberty to select material, emphasize aspects of direct interest to their own work and air speculations which, wisely or not, referees have caused to have removed from their publications. Such personal accounts often make good reading, but may be somewhat misleading especially for readers seeking an introduction to the field. One remedy is to aim at a comprehensive review with equal weight given to all publications but boredom, if not bias, is then likely to creep in.
24
Finnane, Mark. "Wolston Park Hospital, 1865–2001: A Retrospect." Queensland Review 15, no. 2 (July 2008): 39–58. http://dx.doi.org/10.1017/s1321816600004761.
Full textAbstract:
We know about the first day at Wolston Park from a report in theBrisbane Courierof 1865. On 12 January of that year, seven prison warders (two of them women) and ten police constables escorted 57 male and twelve female lunatics from Brisbane Gaol ‘to the new Asylum at Woogaroo’. Since 1859, Queensland's insane had no longer been sent to Sydney, but were lodged instead at the Brisbane Gaol. Now the asylum was ready, its residents were loaded into cabs and taken down to the river. There they boarded a steamer namedSettlerand were conveyed down the river to the landing point near Woogaroo Creek. The name of the asylum hinted at the reality that this was Aboriginal land: the word Woogaroo, so it was remembered in the 1930s, being a corruption of an Aboriginal word meaning ‘to step over a person lying down’. Aboriginal people would be among the earliest inhabitants of the asylum, but not in great numbers. Instead, the institution was rapidly filled from its earliest days with the immigrant settlers who made up most of the colony's growing population.
25
Rogacki, K., P. Esquinazi, E. Faulhaber, and W. Sadowski. "Low-temperature magnetization and flux creep studies of a DyBa2Cu3O7 single crystal with a vibrating reed." Physica C: Superconductivity 246, no. 1-2 (May 1995): 123–32. http://dx.doi.org/10.1016/0921-4534(95)00142-5.
Full text
26
MacSwain, Robert. "Above, Beside, Within: The Anglican Theology of Austin Farrer." Journal of Anglican Studies 4, no. 1 (June 2006): 33–57. http://dx.doi.org/10.1177/1740355306064518.
Full textAbstract:
ABSTRACTAustin Farrer is highly praised but curiously under-read. Despite being recognized as ‘possibly the greatest Anglican mind of the 20th century,’ his influence in discussions of Anglican identity and theology is almost non-existent. As an attempt to remedy this deficit, this paper provides a sketch of Farrer's life and work, and then presents him as a specifically Anglican theologian through considering a sermon, a meditation on the Apostles' Creed, and a set of lectures to Oxford undergraduates. But presenting Farrer as ‘a specifically Anglican theologian’ is problematic if we cannot agree on the nature of Anglican theology. Therefore, the paper concludes by referencing a debate between Stephen Sykes and Paul Avis on this question, and asks if Farrer can function as a paradigm for contemporary Anglican theologians.
27
Black, Jason. "A Clash of Native Space and Institutional Place in a Local Choctaw-Upper Creek Memory Site: Decolonizing Critiques and Scholar-Activist Interventions." American Indian Culture and Research Journal 36, no. 3 (January 1, 2012): 19–44. http://dx.doi.org/10.17953/aicr.36.3.c875884204q12h21.
Full textAbstract:
This essay - a combination of authorial narrative and scholarly critique - examines a grassroots organization's (Friends of Historic Northport) campaign to preserve a site in west Alabama where a pivotal Choctaw-Upper Creek battle took place in 1785. The organization has faced opposition from city planners and business leaders intent on developing the site. I argue herein that these institutional agents have maneuvered within colonial contexts and neocolonial ideologies to mute the voices of indigenist-centered preservation efforts, mostly by occluding a key Native-centered narrative that affirms the battle's location. In the process, Native memories and indigenous "space" have been ignored, and a presentation of these memories has been left out of the "place" of the site. Here, Native memories are made illegitimate by the trumping of oral stories with paid-for physical evidence deemed authoritative as a part of municipal "governing rules." In addition to demystifying the institutional agents' colonial and neocolonial renderings, this essay offers an interventionist charge through prescriptive decolonial tactics to remedy this particular moment of neocolonization. These more local decolonial prescriptives are then extended to general struggles involving Native memory and "space."
28
Kimball, Matthew E., Kenneth W. Able, and Thomas M. Grothues. "Evaluation of Long-Term Response of Intertidal Creek Nekton to Phragmites australis (Common Reed) Removal in Oligohaline Delaware Bay Salt Marshes." Restoration Ecology 18, no. 5 (September 2010): 772–79. http://dx.doi.org/10.1111/j.1526-100x.2009.00543.x.
Full text
29
Helton, Douglas, Donna Lawson, and Martin McHugh. "NATURAL RESOURCE DAMAGE ASSESSMENT OF THE PRESIDENTE RIVERA OIL SPILL, DELAWARE RIVER1." International Oil Spill Conference Proceedings 1995, no. 1 (February 1, 1995): 333–38. http://dx.doi.org/10.7901/2169-3358-1995-1-333.
Full textAbstract:
ABSTRACT On June 24, 1989, the Uruguayan merchant marine tanker Presidente Rivera, loaded with 19 million gallons of No. 6 fuel oil, ran aground in the Delaware River near Marcus Hook, Pennsylvania, spilling between 200,000 and 300,000 gallons of oil. Currents spread the oil over approximately 29 miles of shoreline in New Jersey, Delaware, and Pennsylvania, reaching upstream as far as Little Tinicum Island, a wildlife refuge near Philadelphia, and downstream as far as Reedy Island, south of the Chesapeake and Delaware Canal. Natural resources under the trusteeship of New Jersey, Delaware, Pennsylvania, the U.S. Department of the Interior, and the National Oceanic and Atmospheric Administration (U.S. Department of Commerce) were affected by the spill, including shoreline parks, fisheries, marshes, birds, and wildlife. Additionally, portions of the river were closed to vessel traffic and nearby creeks were boomed off, preventing access to marinas and boat ramps. After three years of damage assessment, pretrial discovery, and negotiations, the trustees reached a settlement on natural resource damages with the responsible party. This paper discusses the strategy used by the trustees in developing a natural resource damage claim and highlights some of the lessons learned during the assessment and settlement process.
30
Wu, BW, GX Chen, JZ Lv, Q. Zhu, and X. Kang. "Generation mechanism and remedy method of rail corrugation at a sharp curved metro track with Vanguard fasteners." Journal of Low Frequency Noise, Vibration and Active Control 39, no. 2 (May 2, 2019): 368–81. http://dx.doi.org/10.1177/1461348419845992.
Full textAbstract:
In Chinese metro lines, Vanguard fastener system is widely used as vibration damping fastener. However, the rails mounted with this fastener system are deeply affected by rail corrugation. The generation mechanism of corrugation wear at a metro track mounted with Vanguard fastening is revealed through the numerical simulation method. A finite element model including two rails, the track system, and a leading wheelset is set up. The parameter sensitivity analysis is conducted to identify the dominant factors affecting the rail corrugation. Then, the remedy method to suppress the corrugation wear is put forward on the basis of the parameter analysis results. The results indicate that the severe corrugation wear on the inner rail is attributed to the self-sustained vibration of the wheelset–track system aroused by the saturated wheel–rail creep force. The frequency of the rail corrugation calculated by the model is very close to the measured data. The elastic modulus and the damping coefficient of the rubber rest pad in the Vanguard fasteners have a high impact on rail corrugation. Increasing the elastic modulus and the damping coefficient can effectively restrain or even eliminate the rail corrugation. Bringing the damping coefficient of the rubber rest pad above 0.0001 can significantly alleviate the rail corrugation. The influence of the damping and stiffness of the rubber pad under the floating slab track bed is negligible.
31
Stroganova, Yevgeniya. "Ivan Yuvachev: personal and public." Przegląd Wschodnioeuropejski 8, no. 1 (July 1, 2017): 91–99. http://dx.doi.org/10.31648/pw.3606.
Full textAbstract:
The article draws on the personal fund of Ivan P. Yuvachev, member of the revolutionary organisation Narodnaya Volia, political convict and hard labourer, who eventually became a religious writer and memorialist. His literary heritage – unlike his son’s, the absurdist poet Daniil Kharms – has long remained forgotten. Basing on the biographical method, we elucidate the difference of self-expression of a writer in his texts designed for publication and his ego-documents. Our analysis aims at showing that his memoirs and essays uncovered Yuvachev’s external biography, while his private texts – his diaries and personal correspondence – are more pertinent to reveal his creed, particularly the idealism that constituted the core of his personality. This raises the question of the writer’s preserving the documents which concerned his private life. Our hypothesis is that Yuvachev was deliverately constructing his personal archive, ready to the fact that in future his life and destiny would become known in every detail.
32
Ozyildirim, H. Celik, and Harikrishnan Nair. "Durable Concrete Overlays in Two Virginia Bridges." Transportation Research Record: Journal of the Transportation Research Board 2672, no. 27 (June 11, 2018): 78–87. http://dx.doi.org/10.1177/0361198118777606.
Full textAbstract:
The purpose of this study was to implement innovative concretes with low permeability and reduced cracking potential in overlays to reduce chloride infiltration into the bridge decks. Two parallel bridges on Route 64 over Dunlap Creek in Alleghany County, Virginia, were selected for this study. For low cracking potential, relatively low water contents, shrinkage reducing admixtures, and lightweight aggregates were used. For low permeability, concretes had supplementary cementitious material and relatively low water–cementitious material ratios. In the overlays, five different materials were used: latex-modified concrete with rapid set cement; silica fume concrete alone; and silica fume concrete with shrinkage reducing admixture, lightweight coarse aggregate, and partial lightweight fine aggregate. A compressive strength of 3,000 psi at 3 days was sought. The performance of the overlay concretes was observed after two to three winters. The overlays used in this study achieved the specified strength and low permeability. There were minimal tight cracks except for one section with the latex-modified concrete with rapid set cement in the left lane of the westbound bridge. The extensive cracks in that section were attributed to plastic shrinkage from adverse weather conditions at placement and the fact that a truck had caught fire in that lane. Silica fume concrete overlays with shrinkage reducing admixture, lightweight coarse aggregate, or lightweight fine aggregate are ready for implementation in the field for low cracking overlays.
33
Misrak, Abel, Luu Nguyen, Steven Kummerl, and Dereje Agonafer. "Characterization of Mechanical Properties and Creep Behavior of Woven Glass/Epoxy Substrates by Nanoindentation." Journal of Microelectronics and Electronic Packaging 15, no. 2 (April 1, 2018): 95–100. http://dx.doi.org/10.4071/imaps.654387.
Full textAbstract:
Reliability is of a concern when designing new products. Extensive set of reliability tests are performed before a product is ready to be shipped for use. Drop testing, thermal cycling, power cycling, etc. are some of the tests used to assess the reliability of new electronic products. However, performing experimental study of every new design is costly and time consuming. Computational tools (such as finite element analysis software) are often employed to perform the required reliability analysis in a shorter time period and save valuable resources. One of the challenges of performing computational analysis is obtaining accurate material property data to be used for building accurate models. Extensive set of material characterization work needs to be carried out before an accurate model can be developed. For example, for a new printed circuit board (PCB), the bulk properties are often characterized by equipment such as thermomechanical analyzer and tensile testing machines to obtain the bulk properties that can be used for the computational study. However, if a detailed layer-by-layer model is required for the study, it is often difficult to obtain location-dependent mechanical properties for a given woven glass/epoxy substrate. In this article, the use of nanoindentation technique to measure the modulus and creep behavior for a specific layer in the PCB stack-up is investigated. Using measurements at room temperature, the effect of surface roughness, hold time, and maximum load on measurement values is examined.
34
SRINIVASAN, MARUWADA, and N. MANOJ KUMAR. "A LABORATORY STUDY OF BITUMINOUS MIXES USING A NATURAL FIBRE." YMER Digital 21, no. 04 (April 29, 2022): 567–79. http://dx.doi.org/10.37896/ymer21.04/57.
Full textAbstract:
Generally, a hydrocarbon mixture could be a mixture of coarse combination, fine combination, filler and binder. A Hot combine Asphalt could be a hydrocarbon mixture wherever all constituents ar mixed, placed and compacted at warm temperature. HMA is Dense ranked mixes (DGM) called Bituminous Concrete (BC) or gap ranked called Stone Matrix Asphalt (SMA). SMA requires stabilising additives composed of polysaccharide fibbers, mineral fibres or polymers to prevent drain down of the combination. within the gift study, an effort has been created to review the consequences of use of a naturally and domestically out there fibre known as SISAL fibre is employed as stabilizer in SMA associated as an additive in BC. For preparation of the mixes combination gradation has been taken as per MORTH specification, binder content has been varied often from fourdimensional to seven-membered and fibre content varied from 1/3 to most zero.5% of total combine. As a district of preliminary study, ash has been found to result satisfactory Marshall Properties and therefore has been used for mixes in subsequent works. victimization Marshall Procedure Optimum Fibre Content (OFC) for each B.C. and SMA mixes was found to be zero.3%. equally Optimum Binder Content (OBC) for B.C. and SMA were found to be five-hitter and five.2% severally. Then the B.C. and SMA mixes ready at OBC and OFC ar subjected to totally different performance checks like Drain down test, Static Indirect strength check and Static Creep check to judge the consequences of fibre addition on combine performance. it's ended that addition of sisal fibre improve the combination properties like Marshall Stability, Drain down characteristics and indirect strength just in case of each BC and SMA mixes. Ii is ascertained that SMA is healthier than B.C. in respect of indirect tensile strength and creep characteristics.
35
Donahue, Tammy L. Haut, Colin Gregersen, M. L. Hull, and Stephen M. Howell. "Comparison of Viscoelastic, Structural, and Material Properties of Double-Looped Anterior Cruciate Ligament Grafts Made From Bovine Digital Extensor and Human Hamstring Tendons." Journal of Biomechanical Engineering 123, no. 2 (October 1, 2000): 162–69. http://dx.doi.org/10.1115/1.1351889.
Full textAbstract:
Due to ready availability, decreased cost, and freedom from transmissible diseases in humans such as hepatitis and AIDS, it would be advantageous to use tendon grafts from farm animals as a substitute for human tendon grafts in in vitro experiments aimed at improving the outcome of anterior cruciate ligament (ACL) reconstructive surgery. Thus the objective of this study was to determine whether an anterior cruciate ligament (ACL) graft composed of two loops of bovine common digital extensor tendon has the same viscoelastic, structural, and material properties as a graft composed of a double loop of semitendinosus and gracilis tendons from humans. To satisfy this objective, grafts were constructed from each tissue source. The cross-sectional area was measured using an area micrometer, and each graft was then pulled using a materials testing system while submerged in a saline bath. Using two groups of tendon grafts n=10, viscoelastic tests were conducted over a three-day period during which a constant displacement load relaxation test was followed by a constant amplitude, cyclic load creep test (first day), a constant load creep test (second day), and an incremental cyclic load creep test (third day). Load-to-failure tests were performed on two different groups of grafts n=8. When the viscoelastic behavior was compared, there were no significant differences in the rate of load decay or the final load (relaxation test) and rates of displacement increase or final displacements (creep tests) p>0.115. To compare both the structural and material properties in the toe region (i.e., <250 N) of the load-elongation curve, the tangent stiffness and modulus functions were computed from parameters used in an exponential model fit to the load (stress)—elongation (strain) data. Although one of the two parameters in the functions was different statistically, this difference translated into a difference of only 0.03 mm in displacement at 250 N of load. In the linear region (i.e., 50–75 percent of ultimate load) of the load-elongation curve, the linear stiffness of the two graft types compared closely (444 N/mm for bovine and 418 N/mm for human) p=0.341. At failure, the ultimate loads (2901 N and 2914 N for bovine and human, respectively) and the ultimate stresses (71.8 MPa and 65.6 MPa for bovine and human, respectively) were not significantly different p>0.261. The theoretical effect of any differences in properties between these two grafts on the results of two types of in vitro experiments (i.e., effect of surgical variables on knee laxity and structural properties of fixation devices) are discussed. Despite some statistical differences in the properties evaluated, these differences do not translate into important effects on the dependent variables of interest in the experiments. Thus the bovine tendon graft can be substituted for the human tendon graft in both types of experiments.
36
Cameron, Euan. "For Reasoned Faith or Embattled Creed? Religion for the People in Early Modern Europe." Transactions of the Royal Historical Society 8 (December 1998): 165–87. http://dx.doi.org/10.2307/3679293.
Full textAbstract:
There has long been some measure of agreement that European people in the middle ages adhered to a form of Christianity which was ‘folklorised’, ‘enchanted’, or ‘magical’. Interwoven with the traditional creeds and the orthodox liturgy were numerous beliefs and practices which were intended to ensure spiritual and bodily welfare, and guard against misfortune. To the endless frustration of theologians, ‘religion’ and ‘superstition’ stubbornly refused to remain clearly separate, despite the intellectual effort expended in forcing them into different compartments. ‘Superstitious’ rites or beliefs repeatedly intersected with the official Catholic cult. It was believed that if a talisman were placed under an altar-cloth during mass, it would acquire spiritual potency. Orthodox prayers were constantly adapted to serve the needs of popular magic. Clergy, let alone layfolk, found the line between acceptable and superstitious practice difficult to draw. For a graphic illustration of this problem, one need only look at the following recipe for curing a hailstorm caused by sorcery:But against hailstones and storms, besides those things said earlier about raising the sign of the cross, this remedy may be used: three little hailstones are thrown into the fire with the invocation of the most Holy Trinity; the Lord's Prayer with the Angelic Salutation is added twice or three times, and the Gospel of St John, ‘In the beginning was the word’, while the sign of the cross is made against the storm from all quarters, before and behind, and from every part of the earth. And then, when at the end one repeats three times, ‘the Word was made flesh’, and says three times after that, ‘by these Gospels uttered, may that tempest flee’, then suddenly, so long as the storm was caused to happen by sorcery, it will cease.
37
Justice, Benjamin. "Thomas Nast and the Public School of the 1870s." History of Education Quarterly 45, no. 2 (2005): 171–206. http://dx.doi.org/10.1111/j.1748-5959.2005.tb00034.x.
Full textAbstract:
In the decade and a half after the Civil War, the American public school rose and fell as a central issue in national and state politics. After a relative calm on matters of education during and immediately after the War, the Republican Party and Catholic Church leaders in the late 1860s and early 1870s joined a bitter battle of words over the future of public education—who should control it, how should it be financed, and what should it teach about religion. These battles often reflected very different world views. Leading Protestant ministers and Republican politicians waved the threat of a rising antidemocratic “Catholic menace” as the new bloody shirt and championed their own educational ideal as a remedy—religiously neutral, ethnically and racially inclusive common schools. While Democrats tended to downplay school issues, Catholic Church leaders countered with their own screed: common schools were hardly common, embodying either inherently Protestant notions of religion or the atheism of no true religious creed at all. New York City became the epicenter of these cataclysmic debates, and the brilliant cartoonist Thomas Nast immortalized the Radical Republican side of the issue in the pages ofHarper's Weekly.
38
Gribsholt, B., E. Struyf, A. Tramper, L. De Brabandere, N. Brion, S. van Damme, P. Meire, F. Dehairs, J. J. Middelburg, and H. T. S. Boschker. "Nitrogen assimilation and short term retention in a nutrient-rich tidal freshwater marsh – a whole ecosystem <sup>15</sup>N enrichment study." Biogeosciences 4, no. 1 (January 11, 2007): 11–26. http://dx.doi.org/10.5194/bg-4-11-2007.
Full textAbstract:
Abstract. An intact tidal freshwater marsh system (3477 m2) was labelled by adding 15N-ammonium as a tracer to the flood water inundating the ecosystem. The appearance and retention of 15N-label in different marsh components (leaves, roots, sediment, leaf litter and invertebrate fauna) was followed over 15 days. This allowed us to elucidate the direct assimilation and dependence on creek-water nitrogen on a relatively short term and provided an unbiased assessment of the relative importance of the various compartments within the ecosystem. Two separate experiments were conducted, one in spring/early summer (May 2002) when plants were young and building up biomass; the other in late summer (September 2003) when macrophytes were in a flowering or early senescent state. Nitrogen assimilation rate (per hour inundated) was >3 times faster in May compared to September. On both occasions, however, the results clearly revealed that the less conspicuous compartments such as leaf litter and ruderal vegetations are more important in nitrogen uptake and retention than the prominent reed (Phragmites australis) meadows. Moreover, short-term nitrogen retention in these nutrient rich marshes occurs mainly via microbial pathways associated with the litter and sediment. Rather than direct uptake by macrophytes, it is the large reactive surface area provided by the tidal freshwater marsh vegetation that is most crucial for nitrogen transformation, assimilation and short term retention in nutrient rich tidal freshwater marshes. Our results clearly revealed the dominant role of microbes in initial nitrogen retention in marsh ecosystems.
39
Emmanuel, Foadieng, Fouotsa Woutsop Christian Martial, Azeufack Tonfack Ulrich Gaël, Talla Pierre Kisito, and Fogue Medard. "Mechanical Behavior of Pericopsis elata Relative to Age during Growth." Advances in Materials Science and Engineering 2021 (March 17, 2021): 1–14. http://dx.doi.org/10.1155/2021/4374181.
Full textAbstract:
The assamela (afrormosia) whose scientific name is “Pericopsis elata” (Harms), a large tree of great commercial value, is an exploited species. It is considered “endangered” by the IUCN.” Trees ready for harvesting are scarce because the logging diameter, which has been set at 100 cm, is very big. The studies recommended by the Cameroonian government as part of the ITTO/CITES project activities should be carried out to determine a new minimum logging diameter as the diameter increases with age. No credible solution is provided in the scientific literature to compensate for its scarcity of exploitation. Moreover, little or no information is available for describing the variation of its mechanical properties over time in order to determine the age at which its wood mechanical properties are good enough to be marketable. It is in this context that this work was undertaken. In this study, we adopted an experimental approach to evaluate the mechanical properties of this species exploited in southeast Cameroon. We then studied the variations in these properties as a function of tree age in order to propose leads for their exploitation. Thus, the compression and bending tests allowed us to estimate the relationship between the mechanical properties in three main directions of the log (MOE in compression and bending, failure stress in compression and bending, and creep in compression) and age (or diameter). We also used the 10-hour creep under low axial compressive loading data to implement the theoretical fractional Maxwell (MF) model, which was compared to the experimental data. For this purpose, after three months of natural drying in the laboratory, we evaluated the above mechanical properties according to age. This study shows that the mechanical properties change as the diameter increases and change very quickly from 70 cm diameter upwards. From the analysis of the experimental data, we deduced that the minimum diameter of exploitable trees should be equal to 80 cm corresponding to the age of about 200 years.
40
Parikh, Margie. "Launch and closure of an Indian cement plant." Emerald Emerging Markets Case Studies 1, no. 1 (January 1, 2011): 1–11. http://dx.doi.org/10.1108/20450621111125450.
Full textAbstract:
Subject area Decision making, behavioural decision making, heuristics, optimistic bias, confirmatory bias, anchoring bias, ready mix cement (RMC) business in India. Study level/applicability Post graduate management course, executive training program in the subject areas. Case overview Arco is a Projects and Infrastructure-sector company. Some of its key officials, believing that entering the RMC can be beneficial for Arco, plan entry into the manufacturing of RMC but order a feasibility report. The report confirms the hunch and Arco starts the business under the aegis of its associate, EG Ltd (EGL) which is into equipment rental business. At this time a new dimension of reality opens up but the senior officers refuse to accept a revised proposal which is adjusted to the new realities. After a few months and some losses, EGL closes down the RMC plant and rents it out. Expected learning outcomes This case study is developed with a purpose to provide a basis to discuss how decisions are taken in real life and how various behavioural elements affect the quality of decisions that affect not only the decision makers but many others and their organizations. Focus is especially on prejudice, heuristics and bias that creep into important organizational decisions such as venturing into new business. Supplementary materials Teaching note.
41
Grehl, Elaine, and Gerald Kauffman. "The University of Delaware Rain Garden: Environmental Mitigation of a Building Footprint." Journal of Green Building 2, no. 1 (February 1, 2007): 53–67. http://dx.doi.org/10.3992/jgb.2.1.53.
Full textAbstract:
Green technology best management practices such as rain gardens are often used to retrofit and mitigate the footprints of buildings and impervious cover in watersheds. Rain gardens are a recent technology created to help remedy water abuses. A rain garden promotes the environmental benefits of storm water mitigation, water conservation, groundwater recharge, and reduced waterbody pollution. This research documents the process of implementing a rain garden from initiation through completion on the campus of the University of Delaware in the White Clay Creek National Wild and Scenic River watershed. The design considered the surrounding drainage area, infiltration rates, and plant selection. Through this project the researcher sought to create a demonstration that could inspire the public to create rain gardens. Initial goals of the research included preventing standing water from remaining in the garden after a four-day period, avoiding amendments to the native soil, and foregoing the removal of excavated soil from the rain garden depression off the site. In addition, no plant species were to be planted within the rain garden depression that were not native to within a five-hundred mile radius of Newark, Delaware. From this research, recommendations were generated for those wishing to install a rain garden. These include establishing initial goals, involving stakeholders, considering alternative overflow outlets, and inspecting soils to at least a 6-foot (1.83 m) depth. Further recommendations include stabilizing the contributing drainage area; utilizing aged, triple shredded hardwood mulch; and considering berms for use in capturing runoff and regulating outflows. In addition to mitigating the impacts of stormwater runoff from the buildings and parking lots in the watershed, the rain garden also serves as an outdoor education and research laboratory on campus.
42
Violante, Teresa. "Bring Back the Politics: The PSPP Ruling in Its Institutional Context." German Law Journal 21, no. 5 (July 2020): 1045–57. http://dx.doi.org/10.1017/glj.2020.63.
Full textAbstract:
AbstractIn this paper, I argue that the conflict between the German Federal Constitutional Court and the Court of Justice of the European Union is the story of a clash foretold, if one takes seriously constitutional courts as institutions designed to be “dogs that bite.” The German Court consistently developed a doctrinal tool to guide its role as guardian of the national constitutional order and the democratic principle, and enforced it when the constitutional control of monetary policy measures so required. I analyze the PSPP ruling, focusing on where the Court concluded that the lack of a satisfactory statement of reasons by the European Central Bank prevented it from reviewing the proportionality of the program. I argue that the Court, after conducting a substantive assessment, applied a weak remedy, thereby deferring the last word on the constitutionality of the PSPP to the political branches. In doing so, the Court opens space for the political assessment of a controversial monetary policy, enhancing the politicization of the Economic and Monetary Union, and provides a doctrinal toolbox for national constitutional courts that face competence creep of EU law in their jurisdictions. I conclude that, ultimately, the main merit of constitutional courts’ interventions in the EU integration is that they are in a privileged position to allow for the politicization of technocratic processes.
43
Hyrcza-Michalska, Monika. "Research on Mechanical Properties of Thin Sheets Blanks Made of Creep-Resisting Nickel Superalloys." Solid State Phenomena 212 (December 2013): 259–62. http://dx.doi.org/10.4028/www.scientific.net/ssp.212.259.
Full textAbstract:
Mechanical working manufacturing methods of nickel alloys used conventionally strips and blanks need to solve many problems concerning high strength material forming which is characteristic limited plasticity. The production pressed elements of vehicle constructions and aircraft engine elements requires the high quality drawpieces since these are essential for safety. They are also the main structural components. Conventional methods of mechanical working such as pressing can be used in quantity production of the above mentioned elements and their production can also be cost-effective. Forming nickel alloys generates a lot of technological wastes resulting from back-springing effects determining the most appropriate pressure in the process of pressing. Failure holes in the process of bulging as well as cracking of drawpieces in the process of deep drawing. The heterogeneous mechanical properties distribution on thin sheet blanks made of Inconel alloy, which is different than material quality certificate shows, produces also a lot of manufacturing problems. These problems are usually solved by production engineers in the following way: dividing the production of ready drawpieces into a bigger number of simple blank profiling operations, shallow pressing, using a rubber punch for pressing or hydroforming. Complex drawpieces shapes are quite often made of several parts which are next welded. In the case of presented tube a tubular diffuser made of Inconel 718 alloy blank and cone made of Inconel 625. However the process of forming high strength materials like nickel alloys requires the application bigger forming forces than in the same kind of conventional formable steel processes. Tools get jammed quite often in the process and high force presses of 10 MN or more need to be used so is very expensive. The aspect of cold mechanical forming discussed materials has been a particular interest. The researches based on precise evaluation mechanical properties and technological plasticity of the selected materials in basic mechanical and technological tests as well as in FEM numerical simulation (finite elements method). The material models applied to simulation contain the pointed out experimentally the mechanical characteristics of Inconel alloys. The thin sheets blanks made of 0,9 mm thick Inconel 718 alloy and 0,45 mm thick Inconel 625 alloy blanks have been examined. The possibilities of using numerical simulations for solving the problems of selecting or modifying the pressing technology and hydroforming that type materials as well as forecasting the results of forming processes have been also presented. The evaluation of drawability of thin sheets blanks made of Inconel 718 and 625 alloys has also been discussed in the paper.
44
Valentine, Deborah. "Book Reviews : When You're Ready: A Woman's Healing from Childhood Physical and Sexual Abuse by Her Mother. By Kathy Evert. Walnut Creek, CA Launch Press, 1987, 194 pp , $9 95 (paperback." Affilia 4, no. 2 (July 1989): 101–3. http://dx.doi.org/10.1177/088610998900400215.
Full text
45
Distaso, E., G. Calò, R. Amirante, P. De Palma, M. Mehl, M. Pelucchi, A. Stagni, and P. Tamburrano. "Highlighting the Role of Lubricant Oil in the Development of Hydrogen Internal Combustion Engines by means of a Kinetic Reaction Model." Journal of Physics: Conference Series 2385, no. 1 (December 1, 2022): 012078. http://dx.doi.org/10.1088/1742-6596/2385/1/012078.
Full textAbstract:
Abstract The urgent need to reduce the dependence on fossil fuels has re-ignited the interest toward Hydrogen Internal Combustion Engines (HICEs). Nevertheless, there are still criticalities that need to be assessed for accelerating the development of this technology. The undesired but unavoidable participation of lubricant oil to the combustion process can be the cause of many of these. Due to an extremely low autoignition resistance at low temperatures, lubricant oil is considered the main responsible for the onset of abnormal combustion modes, which need to be understood for delivering reliable and ready to market HICEs. By employing a kinetic reaction mode, this work analyses the autoignition tendency of hydrogen contaminated with n-C16H34 (n-hexadecane), the latter being selected as a surrogate species representative of lubricant oil chemical characteristics. Starting from the detailed CRECK model (Version 2003), a reduced mechanism with very small size (169 species and 2796 reactions) was developed, which makes it suitable for the use in practical CFD engine simulations. Zero-dimensional numerical simulations were performed employing the reduced mechanism to quantify the variation of hydrogen ignition delay time due to the presence of different amounts of lubricant oil. Operating conditions typical of engine chambers were considered in the analysis. The results show that lubricant oil can have a significant impact on the charge reactivity, especially in the low-temperature range, with consequences that can potentially hamper the development of HICEs.
46
Kocurek, Robert, and Janusz Adamiec. "Structural Stability of Welded Joints of Magnesium Alloy EZ33A-T5." Materials Science Forum 782 (April 2014): 408–14. http://dx.doi.org/10.4028/www.scientific.net/msf.782.408.
Full textAbstract:
Magnesium alloys of Mg-Zn-RE-Zr group are characterized by creep resistance up to 250°C, good castability, absence of the microporosity and gas corrosion resistance. Defect of these alloys are low mechanical properties at ambient temperature. Magnesium alloys are used in the automotive, aerospace and defense industries, mainly as gravitational casts to sand moulds or die-casting. Casting defects often appear in these casts (misruns, micro-shrinkage, cracks), especially for large-size castings. The welding technologies are most often applicable to repair of casts, mainly non-consumable electrode welding in the inert-gas cover. Welded joints made of magnesium alloys should have properties at least the same as the ready cast, in particular it should ensure stability of the structure and properties of all welded joint in working temperature. In the literature there is a lack of information about stability and properties of welded joints of Mg-4E-3Zn (EZ33A-T5 acc. to ASTM B80) alloy castings. In research work determined the structure of welded joints of Mg-4RE-3Zn alloy casting after stress-relief annealing and defined changes of structure and properties during long-term annealing at the temperature of 250°C. It was found that the structure of welded joint of casting alloy Mg-4RE-3Zn is stable at the temperature of 250°C through at least 1000 hours. The hardness of tested joints equal 80 HV. Therefore welding technologies can be used for repair of magnesium alloy casts with addition of zinc and rare earth elements.
47
Ubaidillah, Aan Eko Khusni. "Science and Charity, Educational therapy and active learning, increasing brain intelligence or heart intelligence." Progressa: Journal of Islamic Religious Instruction 3, no. 2 (December 24, 2019): 59–66. http://dx.doi.org/10.32616/pgr.v3.2.195.59-66.
Full textAbstract:
Transhumanism, a unique cyber entity perspective, posthumanism offers a unique integration between agency, memory and imagination in a philosophical way to achieve a harmonious ecology harmony that is developing and interrelated, increasing the education provided to graduates is necessary. The purpose of this paper discusses learning of Science and Charity, how education therapy and active learning, as well as improving brain intelligence or heart intelligence. From the results of the discussion it was concluded: 1) Various studies related to the phenomenon of the era of education 4.0 in general need to improve the education given to graduates therefore if society changes, schools need to change preparing students for the real world, rather than instead isolating students from the real world because students need to be a critical thinker and ready to solve problems, collaborate and communicate; 2) Education must teach the renewal of capacity to create, identify issues regarding current situations and actively provide solutions through the integration of faith, knowledge, charity or creed, shari'ah, morals; 3) Education must provide an ideal mode of therapy Lecture, Reading, Audiovisual, Demonstration, Discussion, Practice and Real Practice with a percentage ratio of 5: 10: 20: 30: 50: 75: 90, or use other patterns and not 100% lecture; 4) educational elements and principals must understand the concepts of knowledge for practice and knowledge in practice which consists of different varieties of knowledge as competitors or complementary such as formal knowledge (referring to theory or research and law or policy) and informal (referring to the practice of wisdom, experience personal, intuitive and tacit knowledge); 5) Other countries are fast advancing on the basis of creativity and innovation as the drivers of the knowledge economy by shifting the education system with the core of considering the abilities and talents of individuals and to create new knowledge.
48
Paul, Norvy. "Community Organising in the Social Distancing Era of Pandemic." International Journal of Social Work 9, no. 2 (January 3, 2023): 32. http://dx.doi.org/10.5296/ijsw.v9i2.20523.
Full textAbstract:
Community organisation is one of the social work methods striving towards creating a self-reliant community built on community action promoting a collaborative and cooperative attitude facilitated by collective consciousness. COVID-19 pandemic created constraints on social work practice, especially community organisation. The pandemic affected the world irrespective of class, creed, race, and sex, and the possible remedy suggested is social distancing and social isolation. Social isolation prevents an infected person from accessing community services and communication. Social distancing is a measure that promotes community members to physical distancing and later restricts all interaction with the assistance of virtual platforms. This challenges the practice of community organisation that promotes sustainable development incorporating balanced growth of four capitals that have interplay among economy, society and environment. The practice of social distancing nurtured a distancing consciousness against the human nature of communitarian living, which demands addressing issues related to mental health, public health, economic life, and a safe environment. These challenges pave the way for community organisation’s creative and constructive practice, forming a virtual community rooted in volunteerism built on an existential approach. It thus facilitates meeting the needs of individuals and communities in the distanced era, and resource mobilisation both internally and externally, and networking serves as the best tool for the same. However, this requires revisiting and re-reading the current philosophy, principles and values of community organisation and adapting new strategies where the community organiser is challenged to opt right approach that blends micro, meso and macro, which aims at collective consciousness enhancement. The key to this positioning of individuals and community is to focus on its strength, i.e., a strength-based approach, but without ignoring that the situation is the determinant of the approach. Nevertheless, the challenge to the community organiser is to remove social isolation or social distancing barriers by enhancing the knowledge horizon of both society and profession, improving skills, understanding the suitable approaches required in the situation and thus becoming a hub as a community facilitator.
49
Remez, M. V., Yu M. Podrezov, V. I. Danylenko, M. I. Danylenko, and S. O. Firstov. "Brittle-ductile transition of titanium aluminides, alloyed by β-phase stabilization elements." Uspihi materialoznavstva 2020, no. 01 (December 1, 2020): 86–97. http://dx.doi.org/10.15407/materials2020.01.086.
Full textAbstract:
The temperature, structural, and rate sensitivity of the plasticity characteristics in γ-tita¬nium aluminides with different Al contents, doped with β-phase stabilization elements, are studied. Particular attention is paid to dislocation mechanisms that control the brittle-plastic transition. The main role of grain boundaries in the formation of plasticity characteristics is demonstrated. At low temperatures, the grain boundaries stop propagation of brittle transgranular cracks and confine the development of the plastic zone beyond the boundaries of an individual grain, creating the prerequisites for fracture in the microdeformation level. At elevated temperatures, the boundaries contribute to the formation of dislocations pile-up in the plastic zone with a stress concentration required to set off the Frank-Reed sources and the displacement of the plastic zone beyond the boundaries of an individual grain, changing its configuration and stress distribution and inhibiting the propagation of cracks. Acceleration of rela¬xation processes in the vicinity of the crack’s tip creates the prerequisites for the development of macrodeformation. Local relaxation processes at the crack’s tip contribute to high speed sensitivity of the plasticity characteristics. This effect has important practical consequences, since there is a temperature region near the upper working temperature of γ-TiAl alloys, where the stress value remains high (yield strength σ02 ~700 MPa and ultimate stress σul ~ 1200 MPa at bending tests) regardless of the strain rate, while deformation sharply increases at low speeds. As a result, it is possible to achieve a combination of high strength and ductility during creep tests. In samples tested by tension with low speed (10-5 s-1) the neck formation take a place. Deformation occurs by the dislocation-twinning mechanisms. At small deformations (7%) a twinning mechanism is preferable. Concentration of dislocations sharply increases at large deformations (32%) with formation of dislocation clusters. Stress relaxation on the boundary between γ-phase twins and α2-lamella, occurs by macroscopic shift on α2-lamella. Keywords: γ-titanium-aluminides, structure, strength, plasticity, brittle-ductile transition, temperature and rate sensitivity.
50
Papadopoulos, Y. A., H. T. Kunelius, and A. H. Fredeen. "Factors influencing pasture productivity in Atlantic Canada." Canadian Journal of Animal Science 73, no. 4 (December 1, 1993): 699–713. http://dx.doi.org/10.4141/cjas93-076.
Full textAbstract:
Most pastures in Atlantic Canada are classified as permanent and contain primarily native species. Well-managed native swards have the potential of supporting profitable animal output. Productive cultivars of cool-season perennial grass species such as timothy (Phleum pratense L.), orchardgrass (Dactylis glomerata L.), tall fescue (Festuca arundinacea Schreb.), reed canarygrass (Phalaris arundinacea L.) and legumes such as white clover can increase pasture productivity in the region and ameliorate seasonal fluctuations in dry matter yield associated with native swards. Improved swards gradually revert to native species, partly because forage cultivars and mixtures are not assessed for persistence under grazing.Soil acidity and deficiencies in soil nutrients were shown to reduce herbage yield, legume content of the grazed swards and mineral content of the herbage, all of which may adversely affect livestock performance. High concentrations of K, observed in swards heavily fertilized with N, are likely to cause problems in the metabolism of Ca and Mg in lactating ruminant livestock grazing such swards.Supplemental pasture crops, including annual ryegrass (Lolium multiflorum Lam.) and Brassica species, extend the productive grazing season from approximately 4 to 7 mo, and permit the production of large quantities of biomass close to the barn.Rotational grazing and forward creep-grazing techniques at high stocking rates can improve the number of animal grazing days and average daily gains. Previous experience with grazing and exposure to pasture species before and during weaning appear to influence grazing behavior and species preference of newly weaned livestock. The use of previous grazing experience may help create the desired pasture sward or improve the efficiency of sward utilization by the grazing animal. The high rainfall climate of the Atlantic region, which promotes good herbage production, also encourages heavy and prolonged infestations of infective free-living stages of gastrointestinal parasites on pastures. Permanent pasture is the main source of initial herd infection, which then spreads to newly seeded pastures. Strategic treatments of grazing livestock with anthelmintic drugs are recommended to minimize the impact of these parasites on the productivity of grazing livestock in this region. Key words: Pasture, Atlantic Canada, productivity, grazing management, fertility management, Brassica spp., grasses, legumes