Academic literature on the topic 'Adaptive Fence'
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Journal articles on the topic "Adaptive Fence"
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Jiang, Jiming, Thuan Nguyen, and J. Sunil Rao. "A simplified adaptive fence procedure." Statistics & Probability Letters 79, no. 5 (March 2009): 625–29. http://dx.doi.org/10.1016/j.spl.2008.10.014.
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Egg, Leonhard, Joachim Pander, Melanie Mueller, and Juergen Geist. "Effectiveness of the electric fish fence as a behavioural barrier at a pumping station." Marine and Freshwater Research 70, no. 10 (2019): 1459. http://dx.doi.org/10.1071/mf18459.
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Dyke-based pumping stations have been linked with high fish mortalities during pumping events. Behavioural barriers like electric fish fences have been proposed as a promising solution to prevent entrainment of fish into pumps. In order to test the effectiveness of such barriers, the intake of a pumping station was equipped with a new generation electric fish fence while fish behaviour was observed with an adaptive resolution imaging sonar (ARIS) during non-electrified (reference) and electrified (treatment) operation modes. This study revealed the functionality of the fish fence as a behavioural barrier, with a fish turning rate of up to 72% at a mean water temperature of 4.3°C and a mean current velocity of 0.05ms–1. These field results suggest that new-generation electric fish fences may be a promising solution to reduce the effects of pumping stations on fish.
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Latch, Emily K., Kenneth L. Gee, Stephen L. Webb, Rodney L. Honeycutt, Randy W. DeYoung, Robert A. Gonzales, Stephen Demarais, and Ryan Toby. "Genetic Consequences of Fence Confinement in a Population of White-Tailed Deer." Diversity 13, no. 3 (March 16, 2021): 126. http://dx.doi.org/10.3390/d13030126.
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Fencing wildlife populations can aid wildlife management goals, but potential benefits may not always outweigh costs of confinement. Population isolation can erode genetic diversity and lead to the accumulation of inbreeding, reducing viability and limiting adaptive potential. We used microsatellite and mitochondrial DNA data collected from 640 white-tailed deer confined within a 1184 ha fence to quantify changes in genetic diversity and inbreeding over the first 12 years of confinement. Genetic diversity was sustained over the course of the study, remaining comparable to unconfined white-tailed deer populations. Uneroded genetic diversity suggests that genetic drift is mitigated by a low level of gene flow, which supports field observations that the fence is not completely impermeable. In year 9 of the study, we observed an unexpected influx of mtDNA diversity and drop in inbreeding as measured by FIS. A male harvest restriction imposed that year increased male survival, and more diverse mating may have contributed to the inbreeding reduction and temporary genetic diversity boost we observed. These data add to our understanding of the long-term impacts of fences on wildlife, but also highlight the importance of continued monitoring of confined populations.
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Langkilde, T. "Holding ground in the face of invasion: native fence lizards (Sceloporus undulatus) do not alter their habitat use in response to introduced fire ants (Solenopsis invicta)." Canadian Journal of Zoology 87, no. 7 (July 2009): 626–34. http://dx.doi.org/10.1139/z09-053.
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The introduction of non-native species is becoming increasingly common. Understanding the impact of invaders on native populations is critical for effective management. Red imported fire ants ( Solenopsis invicta Buren, 1972) were introduced to the USA in the 1930s. They will attack, and can kill, native fence lizards ( Sceloporus undulatus (Bosc and Daudin in Sonnini and Latreille, 1801)), which co-occur with these ants across much of their invasive range. I determined whether fence lizards minimize encounters with S. invicta by altering their habitat use following invasion or avoiding cues of the presence of these fire ants. I recorded the habitat use of fence lizards and S. invicta mounds across four sites with different histories of invasion, and quantified lizard avoidance of S. invicta scent. I found that lizards do not alter their habitat use following S. invicta invasion, nor do they spatially avoid their mounds. Fence lizards do avoid S. invicta scent, but this was only evident in naïve or recently invaded populations. The lack of avoidance of S. invicta by fence lizards could be explained by the high prevalence of these fire ants, making them difficult to avoid, and adaptive shifts in the escape behaviour and morphology of these lizards following invasion that permit them to survive fire ant attack.
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Özdemir, Ayhan, and Mehmet Taştan. "PLL Based Digital Adaptive Filter for Detecting Interharmonics." Mathematical Problems in Engineering 2014 (2014): 1–10. http://dx.doi.org/10.1155/2014/501781.
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Studies on the PLL (phase locked loop) based interharmonic measurements have been considerably increased recently. The method proposed in this study is a hybrid method based on the frequency analysis. The proposed method presents solutions for the leading problems about the interharmonic measurement, such as fundamental frequency shifting, spectral leakage, and picket-fence effect, using digital PLL and adaptive notch filter. In addition, a new approach is presented to solve the multizero crossing problem encountered in the analysis of the harmonic-interharmonic. Both simulative and field data tests have been performed to verify the effectiveness of the proposed method.
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Li, Tao, Xue Jun Pi, and Rui Liu. "A Real Time Adaptive Monitoring Method for Power Signal Harmonic Analysis." Advanced Materials Research 811 (September 2013): 447–52. http://dx.doi.org/10.4028/www.scientific.net/amr.811.447.
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With wider deployments of smart meters, smart grids, and distributed generation, power quality monitoring has become increasingly important. It is well known that fast Fourier transform (FFT) is a powerful tools for power signal harmonic analysis, but leakage effect, picket fence effect, and aliasing effect make FFT suffer from specific restrictions. In this paper, we proposed a new method for power signal harmonic analysis. The major components of this method are a frequency and phasor estimating algorithm, a real time procedure and an adaptive monitoring. To verify this method, we provided the comparisons of this method with FFT.
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Zier-Vogel, Adam, and Karsten Heuer. "The First 3 Years: Movements of Reintroduced Plains Bison (Bison bison bison) in Banff National Park." Diversity 14, no. 10 (October 19, 2022): 883. http://dx.doi.org/10.3390/d14100883.
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We assessed 3 years of post-release movements of a reintroduced plains bison (Bison bison bison) population for evidence of anchoring, settling, exploratory and adaptive behavior within a 1200 km2 target reintroduction zone in Banff National Park. We first held them in a soft-release pasture for 18 months, then partially constrained their movements with drift fences and hazing trials to discourage excursions from a 1200 km2 target reintroduction zone. Their post-release movements were within 13 km of the soft-release pasture for the first 3 months, but management interventions were needed to keep the animals within 29 km of the release site and inside the reintroduction zone for the remainder of the 3-year study period. Bison exploration was high in the first year but decreased thereafter, as did the size of their annual home range. Step lengths did not decrease but the frequency of “surge movements” (step lengths > 4 km in 2 h) did. Fence visits did not decrease over time but the need to herd/haze the bison from other, unfenced boundary areas did. The reintroduced bison seasonally selected for rugged, high-elevation habitat despite being translocated from a flat landscape. Our results suggest wild bison reintroductions to areas of just a few hundred square kilometres are possible without perimeter fencing, so long as good habitat and management interventions to discourage broad movements are in place. Trends suggest such interventions will need to continue in Banff until the bison range can be expanded and/or bison movements are constrained by other forces, such as regulated hunting outside the park.
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Liu, Jin Shui, Xue Li, Jin Laing Zhang, and Cun Lei Li. "3D Visualization for Detailed Sedimentary-Facies Modeling of Lishui Depression, East China Sea Basin." Applied Mechanics and Materials 442 (October 2013): 489–93. http://dx.doi.org/10.4028/www.scientific.net/amm.442.489.
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Geological body is the product of the geological evolution in the time dimension and is also the record and the process of structural changes and sequence changes presenting in 3D configuration, so 3D visualization for sedimentary-facies modeling can results in a large quantity of spatial data which can be used for detailed sedimentary-facies modeling. Lishui Depression is taken for an example and the lower of Mingyuefeng Formation is the target formation for this study. Based on the analysis of sequence cycles and sedimentary environment and interpretation of 3D geological objects, the detailed 3D sedimentary-facies model for the lower Mingyuefeng Formation is built with Sequential Indicator Simulation. Then the 3D visualization of local sedimentary-facies is detailedly presented through fence models and profile models. The results prove that the methodology is competent for 3D modeling and self-adaptive visualization of large geological objects and it is a good way to solve the problem of integration and share of geological spatial data.
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Kitchen, J. L., G. K. McDonald, K. W. Shepherd, M. F. Lorimer, and R. D. Graham. "Comparing wheat grown in South Australian organic and conventional farming systems. 1. Growth and grain yield." Australian Journal of Agricultural Research 54, no. 9 (2003): 889. http://dx.doi.org/10.1071/ar03039.
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Organic farming standards do not allow addition of water-soluble fertilisers and therefore it is likely that growth of organically grown crops will be limited by nutrient availability. However, in marginal rainfall conditions, when growth in conventional systems is limited by water availability, yields of organically grown crops could be comparable with those conventionally grown. Similarly, micronutrient-efficient plant varieties could be expected to perform comparatively better under organic farming conditions than they do in conventional systems, when compared with micronutrient-inefficient varieties.In this study, biomass and grain production of wheat from certified organic farming systems were compared with neighbouring conventional farming systems in 'across the fence' field trials in 1 moderate and 2 marginal rainfall areas of South Australia. Wheat varieties compared included 2 old wheat varieties developed under relatively low-input conditions (Baroota Wonder and Dirk-48) and varieties shown to be micronutrient-efficient (Janz and Trident) and inefficient (Yallaroi).The organic farming systems produced significantly less biomass than the conventional farming systems at late tillering in both the moderate and marginal rainfall areas. Grain yield was variable, but significantly lower in the organic farming system for 11 of the 14 comparisons. None of the varieties showed an adaptive advantage for 1 farming system over the other. The relative yield of the organic system, compared with the conventional system, was not associated with rainfall.
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Johnson, David C., Richard Teague, Steven Apfelbaum, Ry Thompson, and Peter Byck. "Adaptive multi-paddock grazing management’s influence on soil food web community structure for: increasing pasture forage production, soil organic carbon, and reducing soil respiration rates in southeastern USA ranches." PeerJ 10 (July 19, 2022): e13750. http://dx.doi.org/10.7717/peerj.13750.
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Background Measurement of two grazing management’s influence on pasture productivity, soil food web structure, soil organic carbon and soil microbial respiration efficiency was conducted on five southeastern US, across-the-fence ranch pairs to compare adaptive multi-paddock grazing (AMP) management, using short grazing events with planned, adaptive recovery periods, to conventional grazing (CG) management, with continuous grazing at low stock density. Methodology A point-in-time experimental field analysis was conducted to compare five AMP or CG ranch pairs to better understand the influence of grazing management on (a) standing crop biomass productivity; (b) soil food web community population, structure and functionality; (c) soil organic carbon accrual; and d) soil-C (CO2) respiration kinetics. Results AMP grazing systems outperformed CG systems by generating: (a) 92.68 g m−2 more standing crop biomass (SCB), promoting 46% higher pasture photosynthetic capacity (Two sample Mann-Whitney; Z = 6.1836; no DF in MW; p = 6.26 × 10−10; Effect size = 0.35) (b) a strong positive linear relationship of SCB with fungal biomass (R = 0.9915; F(1,3) = 175.35; p = 0.015); fungal to bacterial (F:B) biomass ratio (R = 0.9616; F(1,3) = 36.75; p = 0.009) and a soil food web proxy (R = 0.9616; F(1,3) = 36.75; p = 0.009) and a concurrent very strong inverse relationship with bacteria biomass (R = −0.946; F(1,3) = 25.56; p = 0.015); (c) significant predator/prey interactions with an inverse relationship with bacterial population biomass (R = − 0.946; F(1,3) = 25.56; p = 0.015) and a positive relationship with total protozoa enumeration (R = 0.9826; F(1,3) = 83.68; p = 0.003) when compared to SCB; (d) a 19.52% reduction in soil C (CO2) respiration rates (Two sample t-test; T = −2.3581; DF = 52.3541; p = 0.0221; Effect size = 0.59); and (e) a 20.6% increase in soil organic carbon (SOC) in the top 10 cm of soil profile (Two sample Mann–Whitney; Z = 2.6507; no DF in MW; p = 0.008; Effect size = 0.24). Rancher conversion to AMP grazing strategies would appear to regenerate soil food web population, structure, diversity and biological functionality helping to improve: carbon flow into plant biomass, buildup of soil carbon, predator/prey nutrient cycling and soil microbial respiration efficiency while offering improved climate resilience and a strategy to increase the capture and storage of atmospheric CO2 in soils of the world’s rangeland.
Dissertations / Theses on the topic "Adaptive Fence"
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Robbins, Travis R. "Geographic Variation in Life History Tactics, Adaptive Growth Rates, and Habitatspecific Adaptations in Phylogenetically Similar Species: The Eastern Fence Lizard, Sceloporus undulatus undulatus, and the Florida Scrub Lizard, Sceloporus woodi." Scholar Commons, 2010. http://scholarcommons.usf.edu/etd/3602.
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To understand the evolutionary and ecological significance of geographic variation in life
history traits, we must understand whether the patterns are induced through plastic or adaptive
responses. The Eastern Fence Lizard, Sceloporus undulatus
, exhibits countergradient variation
(larger body sizes, et cetera, in northern, cooler environments; presumed adaptive) in life history
traits across its large geographic range. However, cogradient variation (the expected result from
a plastic response, although not necessarily inconsistent with adaptation) has been suggested as
a null hypothesis, especially on fine geographic scales because of relatively small environmental
changes. Here we focus on life history variation on a fine geographic scale to test whether
cogradient variation is exhibited even though countergradient variation is exhibited at larger
scales, and if so, what mechanisms are involved in the switch. We examined north and south
populations (~2° latitude between) of the S. undulatus, and the Florida Scrub Lizard, S. woodi
, by
measuring adult body sizes, reproduction, and hatchling body sizes over a two year period and
conducting reciprocal transplants of juvenile lizards each year. Our results indicate cogradient
variation (larger body size in the southern population experiencing a warmer environment) in life
history traits of S. undulatus
and countergradient variation, a lack of variation in adult body size,
in S. woodi along the Florida peninsula. Thus, S. undulatus
exhibits cogradient variation at fine
geographic scales and countergradient variation at larger scales. Reciprocal transplants revealed
that the larger adult body sizes in the southern population of S. undulatus
could be explained by
longer growth periods allowed by greater intrinsic survival. In
S. woodi,
the larger than expected
adult body sizes in the north could be explained by faster intrinsic and extrinsic juvenile growth
rates in the northern population. Because
S. undulatus and S. woodi
remain distinct species
associated with distinct, though adjacent, habitats, we also looked for habitat-specific
adaptations. The second reciprocal transplant (between species and habitats) revealed habitatspecific
adaptations in juvenile growth rates, but not juvenile survival. Each native species grew
faster and had a higher average probability of reaching size at maturity in their native
environment than did the foreign species.
Book chapters on the topic "Adaptive Fence"
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Ferguson, Ken, Laura Adam, and Ferran Jori. "An Adaptive Monitoring Programme for Studying Impacts Along the Western Boundary Fence of Kruger National Park, South Africa." In Fencing for Conservation, 105–23. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4614-0902-1_7.
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"Adaptive Fence." In The Fence Methods, 43–59. WORLD SCIENTIFIC, 2015. http://dx.doi.org/10.1142/9789814596077_0003.
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Keohane, Georgia Levenson. "Financing the Future: The Lessons of Innovative Finance and the TIES That Bind." In Capital and the Common Good. Columbia University Press, 2016. http://dx.doi.org/10.7312/columbia/9780231178020.003.0007.
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A globalized world means that the challenges we face are not confined to any one geography or sector; nor must be the solutions. Local carbon emissions produce global warming. Epidemics spread with rapid and cruel caprice. Conflict drives people over fences and oceans in search of sanctuary. Poverty exacerbates all of these problems, and investing in its alleviation is the paramount public good. Accordingly, innovative finance allows and encourages integrative, borderless thinking that makes critical linkages and investments across issues and regions: poverty and environmental degradation, public health and global warming, humanitarian disasters and long-term resilience, and community development that is both place- and people-centric. That is why, when it comes to finance, innovation is not so much about a new product or service as it is about creative application in different circumstances: an expert in securitization who translates future development aid pledges into vaccines today; an entrepreneur who turns a mobile phone into pay-as-you-go solar electricity; the conversion of pay-for-success contracts from bridges and roads to affordable housing, early childhood education, and maternal health. This adaptive approach—the ability to think beyond bounds, to overcome market failure in one context with market solutions from another—is a hallmark of innovative finance....
Conference papers on the topic "Adaptive Fence"
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Radestock, Martin, Alexander Falken, Johannes Riemenschneider, and Markus Kintscher. "Hybrid Skin Design of the Transition Region Between Morphing Wing and Fixed Wing." In ASME 2018 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/smasis2018-7976.
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The adaptation of a wing contour is important for most aircraft, because of the different flight states. That’s why an enormous number of mechanisms exists and reaches from conventional slats and flaps to morphing mechanisms, which are integrated in the wing. Especially integrated mechanisms reduce the number of gaps at the wing skin and produce less turbulent flow. However these concepts are located at a certain section of the wing. This leads to morphing and fixed wing sections, which are located next to each other. Commonly, the transition between these sections is not designed or a wing fence is used. If the transition is not designed, the wing has a step with an activated morphing mechanism and that produces additional vortices. A new skin design will be presented in order to smooth the contour between a fixed wing and a morphing wing. Here the transition between a droop nose and a fixed wing is considered. The skin material is a mix of ethylene propylene diene monomer rubber and glass-fiber reinforced plastic. The rubber is the baseline material, while the glass-fiber is added as stripes in chord-wise direction. In span-wise direction the glass fiber is connected with the rubber. The rubber carries the loads in span-wise direction and reduces the required actuation force. The glass fiber stiffens the skin locally in chord wise direction and keeps the basic contour of the skin. Some geometrical parameters within the skin layup can be varied to change the transition along the span or to reduce the maximum strain within the skin. The local strain maximum is a result of the material transition with different modules. One design of a leading edge was manufactured with an existing mold and it has a span of 200 mm. There are two essential aspects from a structural point of view. One is a nearly continuous deformation along the span and the second is the maximum strain in the rubber. Both aspects are investigated in an experiment and the results are compared with a simulation model. The results show a reliable concept and its numerical model, which will be assigned to a full scale demonstrator. This demonstrator will have a span of 1000 mm and will show the smooth skin transition between a droop nose and a fixed wing.
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Calkins, F. T., J. H. Mabe, and R. T. Ruggeri. "Overview of Boeing’s Shape Memory Alloy Based Morphing Aerostructures." In ASME 2008 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2008. http://dx.doi.org/10.1115/smasis2008-648.
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The Boeing Company has a goal of creating aircraft that are capable of continuous optimization for all flight conditions. Toward this goal we have developed morphing-capable, adaptive structures based on Shape Memory Alloy (SMA) technology that enable component and system level optimization at multiple flight conditions. The SAMPSON Smart Inlet program showed that fully integrated SMA wire bundles could provide a fighter aircraft with a Variable Engine Inlet capability. The Reconfigurable Rotor Blade program demonstrated the ability of highly robust, controlled 55-Nitinol tube actuators to twist a rotor blade in a spin stand test to optimize aerodynamic characteristics. The Variable Geometry Chevrons program, which was the first use of 60-Nitinol for a major aerospace application, included a flight test and static engine test of GE90–115B engine fitted with controlled morphing chevrons that reduced noise and increased engine efficiency. The Deployable Rotor Tab employed tube actuators to deploy and retract small fences which are capable of significantly reducing blade vortex interaction generated noise on a rotorcraft. Most recently, the Variable Geometry Fan Nozzle program has built on the VGC technology to demonstrate improved jet engine performance. The Boeing Company continues to mature SMA technology in order to develop innovative applications and support their commercialization.
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Hanaoka, Sho. "A Study on the Relevance between the Progress of IT and Business Ethics in Typical Japanese Organizations." In 2003 Informing Science + IT Education Conference. Informing Science Institute, 2003. http://dx.doi.org/10.28945/2682.
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Each lower-level organization within in most Japanese companies has its own implicit code of conduct based on its own organizational culture. The structure of the ordinary Japanese organization is expressible as a closed space surrounded by higher walls on all four sides. Also the walls are expressible as roll-away fences, changing their positions by adapting to the changes in the environment. The position of each wall becomes more indefinite by adapting to new business models such as SCM, ERP, ASP, etc. As a consequence, some of these walls become to invisible from time to time, and most companies are confronted with unconformity and confusion between the organizations in doing business. Moreover, the progress of internationalization adds momentum to the confusion. In this paper, first, the author elucidates the peculiar characteristics of the Japanese organization's culture and problems it poses in bus iness ethics. Then, the issue of using IT on business ethics is discussed. Finally, a "wall-in model" expressing the gaps of the adjacent organizations is proposed. Then we discuss the effective use of IT for solving the problems of business ethics.