Catalogue Search | MBRL
Are you sure you want to remove the book from the shelf?
{{itemTitle}}
60,938
result(s) for
"fences"
Sort by:
Chain link
\"Lee Friedlander is celebrated for his ability to weave disparate elements from ordinary life into uncanny images of great formal complexity and visual wit. And few things have attracted his attention--or been more unpredictable in their effect--than the humble chain link fence. Erected to delineate space, form protective barriers and bring order to chaos, the fences in Friedlander's pictures catch filaments of light, throw disconcerting shadows and visually interrupt scenes without fully occluding them. Sometimes the steel mesh seems as delicate as lace; at others it appears as tough as snakeskin. In this book's 97 pictures, drawn from over four decades of work, it recurs as versatile, utilitarian and ubiquitous--not unlike the photographer himself\"--Amazon.com.
Book
Border walls
Two decades after the fall of the Berlin Wall, why are the notable democracies of the United States, India, and Israel building massive walls and fences on their borders? Despite predictions of a borderless world through globalization, these three countries alone have built security barriers totaling an astonishing 5,700 kilometers in length. In this groundbreaking work, Reece Jones analyzes how these controversial walls were justified, their impact on those living behind them, and the long-term effects of the hardening of political boundaries. Border Walls is a bold, important intervention that demonstrates that the exclusion and violence necessary to secure the borders of the modern state often undermine the very ideals of freedom and democracy the barriers are meant to protect.
eBook
No benefit in using rubber‐coated wire to counter loss of voltage due to tall grass in large carnivore deterring fences
Electric wire enclosures to protect livestock represent one intervention to mitigate negative impacts of large carnivores. However, appropriate fence construction and voltage level in the live wires are crucial to deter carnivores. To ensure that the voltage level remains sufficiently high, maintenances and clearing the wires from tall or growing vegetation is regularly needed. In this study, we investigate the performance of a fence wire coated with conductive rubber, claimed by the supplier not to short circuit and drop in voltage due to contact with e.g. ground and vegetation. We examine the voltage of the rubber‐coated wire during contact with soil, ground, and wet vegetation and observed a voltage loss comparable to that of the standard metal fence wire. Our results imply that the rubber‐coated wire does not perform better than a conventional metal fence wire when in contact with growing grass and other elements that usually short circuit an electric fence.
Journal Article
Human–elephant conflict mitigation as a public good: what determines fence maintenance?
Negative interactions between humans and elephants are known to have serious consequences, resulting in loss of life and deterioration in the quality of life for both species. Reducing human–elephant conflicts (HEC) is essential for elephant conservation as well as social justice. Non-lethal electric fences placed around villages or communities are a widely used intervention to mitigate HEC. Such barriers act as non-excludable and non-subtractable resources—i.e., public goods—that must be maintained collectively by beneficiaries or the State. Despite being fairly effective when well maintained, most such fences in northeast India are poorly maintained. This leads to our central question: why are some fences well maintained and others poorly maintained? We studied 19 such fences using qualitative comparative analysis, Ostrom's social-ecological systems framework, and a grounded theory approach, incorporating qualitative social science tools. We found that, contrary to our hypothesis, the functionality of fences cannot be predicted based on the design of the fence, whether or not the community made cash payments, or ethnic homogeneity or leadership in the village. Instead, we found there are three potential pathways of maintenance: (1) a community maintainer, (2) the community self-organizes, and (3) the Forest Department. Maintenance occurs when there is a congruence between perceived costs and benefits for the entity responsible for fence maintenance. These costs and benefits are diverse, including not just material benefits but intangibles like goodwill, sense of safety, social standing, and a feeling of fairness. We highlight these factors and provide recommendations for practitioners and policy.
Journal Article
Fence Ecology
Investigations of the links between human infrastructure and ecological change have provided eye-opening insights into humanity’s environmental impacts and contributed to global environmental policies. Fences are globally ubiquitous, yet they are often omitted from discussions of anthropogenic impacts. In the present article, we address this gap through a systematic literature review on the ecological effects of fences. Our overview provides five major takeaways: 1) an operational definition of fencing to structure future research, 2) an estimate of fence densities in the western United States to emphasize the challenges of accounting for fences in human-footprint mapping, 3) a framework exhibiting the ecological winners and losers that fences produce, 4) a typology of fence effects across ecological scales to guide research, and 5) a summary of research trends and biases that suggest that fence effects have been underestimated. Through highlighting past research and offering frameworks for the future, we aim with this work to formalize the nascent field of fence ecology.
Journal Article
Experimental evidence that feral cats cause local extirpation of small mammals in Australia's tropical savannas
Small mammal species are declining across northern Australia. Predation by feral cats Felis sylvestris catus is one hypothesised cause. Most evidence of cat impacts on native prey comes from islands, where cat densities are often high, but cats typically occur at low densities on mainland Australia. We conducted a field experiment to measure the effect of predation by low‐density cat populations on the demography of a native small mammal. We established two 12·5‐ha enclosures in tropical savanna in the Northern Territory. Each enclosure was divided in half, with cats allowed access to one half but not the other. We introduced about 20 individuals of a native rodent, Rattus villosissimus, into each of the four compartments (two enclosures × two predator‐access treatments). We monitored rat demography by mark‐recapture analysis and radiotracking, and predator incursions by camera surveillance and track and scat searches. Rat populations persisted over the duration of the study (18 months) in the predator‐proof treatment, where we detected no predator incursions, but declined to extinction in both predator‐accessible compartments. In one case, cat incursions were frequently detected and the rat population was rapidly extirpated (<3 months); in the other, cat incursions were infrequent, and the population declined more gradually (c. 16 months) due to low recruitment. We detected no incursions by dingoes Canis dingo, the other mammalian predator in the area. Synthesis and applications. This is the first study to provide direct evidence that cats are capable of extirpating small mammals in a continental setting, in spite of their low population densities. This finding supports the hypothesis that predation by feral cats is contributing to declines of small mammals in northern Australia. The conservation management of native small mammals in northern Australia may require intensive control of cat populations, including large cat‐free enclosures.
Journal Article
Does Virtual Fencing Work for Grazing Dairy Cattle?
Pasture management in Australia’s dairy industry requires the manual shifiting of temporary electric fences to maintain pasture quality and growth. Virtual fencing presents an alternative to save time and labour costs. We used automated virtual fence (VF) collars to determine the variation in learning of the virtual fence stimuli, and evaluated the success of the technology to contain cows in a predetermined area of pasture. Twelve Holstein-Friesian non-lactating multiparous dairy cows were fitted with the collars, and a VF was used to restrict cows to two grazing allocations (G1 and G2) across six days. Cows received an audio tone (AT) when they approached the virtual fence, and a paired electrical pulse (EP) if they continued forward. The VF contained cows within predetermined areas for 99% of time, but cows spent the least time near the fence (p < 0.01). The number of stimuli reduced through time, demonstrating the ability of cows to learn the VF (p = 0.01). However, the mean number of EP per day ranged from 1 to 6.5 between individuals (p < 0.01). Therefore, successful containment may have a welfare cost for some individuals. Further work should focus on this individual variation, including measures of welfare.
Journal Article