Search

Enhancing the energy efficiency of thermal systems reduces their consumption, lowers costs, and reduces undesired environmental impact, thus making these systems more sustainable. The current work introduces a passive method for heat transfer enhancement that is carried out using natural convection by nanofluid. This work introduces a computational study of the process of natural convection within a square cavity containing Cu/H2O nanofluid. The cavity wall on the left side undergoes partial isothermal heating, while the opposing side is fully cooled isothermally, with all other boundaries maintained adiabatic. A mathematical model formulated based on a 2-D model was used to provide the solution for the system of governing equations of mass, momentum, and energy conservation, employing the finite element technique. A commercial CFD package is utilized to perform the computational simulation. The present investigation delves into the impact of the Rayleigh number, nanoparticle concentration, heater length, and heater location on the flow field and heat transfer characteristics. The model outcomes were displayed for a wide range of the pertinent parameters as 103 ≤ Ra ≤ 106, 0.25 ≤ lh ≤ 1.0, 0.125 ≤ hc ≤ 0.875, and 0.02 ≤ ϕ ≤ 0.10. Also, correlation equations relating the average Nusselt number to these crucial parameters are derived. These equations are simple and can be applied in practice easily in many fields, such as electric and electronic equipment cooling and thermal management of heat sources. Also, these equations gather all the parameters that affect the heat transfer process. They are shedding light on the intricate interplay between these parameters in the natural convection heat transfer process. [ABSTRACT FROM AUTHOR]

In this article, I offer an innovative approach to examining the reproduction of commoning in the longue durée. I adopt a broad, but fundamentally spatial, understanding of commoning and enclosure that recognises not only the material but also the political, socio‐cultural, and labour commons. This allows for the identification of both the diversity of commoning practices and institutions and how enclosure has shaped these new commons. Drawing on ethnographic fieldwork, I integrate the concepts of "threshold spatiality" and the "commons circuit" to describe how commoning practices have been adapted to new spatialities following enclosure. The reproduction of commoning in various forms in the Basque Country illustrates what I call "resilient commoning" practices over centuries of political‐economic change. In doing so, I offer a narrative that moves beyond the debate over the Basque Country being historically egalitarian or stratified, instead focusing on the dialectical processes of commoning and enclosure. [ABSTRACT FROM AUTHOR]

Natural or buoyant convection flow is an exemplary heat transfer phenomenon, with growing applications in various industries. This article develops a new algorithm, which models and solves the buoyancy-driven turbulent flows in enclosures more accurately than the past similar solvers. A careful literature review shows that the past existing approaches have mostly had serious limitations to apply their algorithms to buoyancy-driven flows with high temperature differences magnitude because of employing the classical Boussinesq approximation. As the novelty of this study, it benefits from a momentum-based variable approach in the context of the semi-implicit method for the pressure linked equations (SIMPLE) algorithm, which lets it accurately solve the strong compressible buoyant flows with high temperature differences. The algorithm is applied to both the Navier-Stokes and the accompanied turbulent flow governing equations using OpenFOAM 4.1 as the platform. To validate the developed algorithm, the current results are compared with experimental data in both square and tall cavities considering low (8.6 × 105), high (1.43 × 106), and very high (1.58 × 109) Rayleigh numbers. As the major contribution of this work, it improves the accuracy of the thermo-buoyant turbulent flow prediction at both low and high Rayleigh numbers. All test cases are carried out employing two different turbulence models of k-ω and k-ε. Furthermore, comparing the results of the present non-Boussinesq algorithm and those of the past developed methods with the experimental data, it is shown that the present algorithm provides a more accurate prediction for the temperature field, that is, <10% differences with the experimental data. Moreover, the present maximum velocity results surpass the solution of the past numerical methods and show <3% differences with the experimental data. [ABSTRACT FROM AUTHOR]

Copyright of Revue Archéologique de Picardie is the property of Revue Archeologique de Picardie and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The relevance of this study is due to the lack of information space regarding potential biological threats when keeping service dogs and their management methods. The purpose of the work is to analyze and clarify the meaning of the terms “bioprotection and biosecurity”, outline the methods of ensuring biological protection and safety when working with service dogs, expand and generalize the understanding of this issue both in practical and theoretical-legal fields of implementation and implementation in practice In the course of research and analysis of scientific literature, certain general conclusions were formed, which allow to better understand and distinguish specific practical and theoretical-legal components of ensuring biological protection and safety of service dog enclosures. Therefore, the biological management system should provide for and implement principles, rules, and recommendations, the implementation of which is intended to prevent penetration and the spread and release of potential carriers of biological hazards. It was established that to ensure the sanitary and hygienic well-being of the center for keeping service dogs, the “wind rose” principle should be taken into account. You should not neglect the generally accepted requirements for keeping primary documentation of animal records and preventive and curative features of their care, and stringent compliance with the prescriptions for deworming and vaccination of animals. Particular attention should be paid to preventive veterinary measures such as disinfection, namely disinfection of dishes for feeding and watering animals, premises for their taming and operation, disinsection, and derivatization, which, to a large extent, ensure a high level of internal biosafety and protection. Based on the research I conducted, I would like to draw attention to the need to clarify the regulatory and legal mechanisms for ensuring compliance and implementing the provisions of the current legislation of Ukraine and legal doctrine in the field of guaranteeing biological protection and safety. [ABSTRACT FROM AUTHOR]

What happens to our understanding of property regimes when they are analyzed through the case of a translocated colonial fish? The British introduction of trout to South Africa led to enclosures through restrictions on access to trout streams, but also through comparisons with British landscapes 'at home'. These compound dispossessions went hand in hand with a commoning of access for White people to a fish and a sport reserved for elites. Today, debates over trout as an alien species are entangled with post-apartheid struggles over property rights and restoration. While property relations are relations between people, this case shows that relations between people and fish, and the properties of fish, help us understand processes of dispossession, commoning, enclosures, and a bioethical regime in contemporary South Africa. [ABSTRACT FROM AUTHOR]

This study introduces a method of using a composite absorber, including a magnetic absorber, to maintain or improve shielding effectiveness, even if the metallic enclosure has unintentional and intentional apertures. The proposed structure places absorbers on the inner side of an enclosure’s aperture. The electric fields entering the enclosure through the aperture primarily decrease as they pass through the absorber, degrading the resonance characteristics of the enclosure by an inner absorber, thereby reducing the electric field strength within an enclosure and consequently improving the shielding property. A 3D numerical analysis confirmed the improved shielding property of the enclosure [ABSTRACT FROM AUTHOR]

This paper is dedicated to a numerical study of natural convection through a cavity with finned surface where its base temperature is variable with linear profile. An approach based on modelling of internal fluid flow around a finned surface in laminar and at steady state conditions is used. Thermal and hydrodynamic aspects of the fluid flow were analyzed through the numerical resolution of equations of fluid dynamics. For this purpose, we have developed a computer code (in Fortran 90) based on the finite volume method. The studied model consists of a rectangular cavity where vertical walls are thermally insulated, the horizontal ones are maintained at different temperatures: cold and constant temperature on the upper wall and hot temperature with linear profile on the lower wall. The Rayleigh number used is in the range of 103 to 106 and the Prandtl number is fixed at 0.71. The plotted results are related to temperature distribution, streamlines, velocity fields as well as the mean Nusselt number.

In this paper, we explore relations between race, capital and wildlife conservation in the town of Hoedspruit and its surroundings, which has developed into one of the main centres of the lucrative and rapidly growing 'wildlife economy' in South Africa. Behind its image as a shining 'green' example of wildlife-based development is a highly unequal and racialised state of affairs that is deeply unsustainable. At the core of these dynamics are private wildlife reserves, high-end nature-based tourism and gated 'wildlife estates', which have further consolidated land into private, mostly white, ownership. In addition to contestations about the building of a shopping mall and land claims, Hoedspruit's wildlife economy is dependent upon black labourers who commute daily from former homeland areas. Municipal efforts to mediate this situation by building affordable housing, have been thwarted by several wealthy inhabitants and property developers. We build on Mbembe's 'logic of enclosure' to argue that the wildlife economy and its 'green' image perpetuate and reinvent older forms of colonial and apartheid geographies of segregation, in effect creating a form of 'new green apartheid'. While physical-geographical enclosures are at the centre of the wildlife economy, we show that they are reinforced by class and racial enclosures and ideological enclosures, the latter consisting of both the belief in the market as a natural solution for social and environmental causes and apartheid as an historical era that has now ended. We conclude that Hoedspruit serves as an important example of the regressive and unsustainable forms of development that the wildlife economy in South Africa can create. [ABSTRACT FROM AUTHOR]

This paper describes a singular group of evidence gathered on a small hill at ca. 900 meters of altitude. The hill is located in mid-eastern Asturias, near the Cantabrian Mountains in the northern part of Iberia. The archaeological remains consist of one prehistoric barrow at the top part which is already included in the Sites and Monuments Record. Moreover, several other tiny elevations surround the main barrow, and around them, a few new enclosures have been identified. Despite their irregular conservation, all of them have small parapets meaning clear archaeological features. Old and new data were gathered thanks to three different techniques used in this research: fieldwork, aerial photographs and LiDAR analysis. Due to the lack of archaeological excavations and geophysics analysis, the chronology suggested here must be, at this point of the research, very broad. Finally, the manuscript explores different kinds of enclosures, from prehistoric and historic times, which can be similar to the evidence identified in el Cuetu. [ABSTRACT FROM AUTHOR]

Abstract At the site Vasagård on the island of Bornholm a double causewayed enclosure dating from EN II to MN AIII is superseded by palisade enclosures constructed from the beginning of MN AV and covering a larger area. The transition from MN AIII to MN AV is dated to ca. 2900BCE, without allowing for an intermediate period 'MN AIV', and regarded as a significant change in terms of artefact composition, ritual activities and possibly social organization. Within the palisade enclosures seven post circles were investigated. The material found in the postholes indicates that they are remains of cult houses, and that the rituals that took place there included destruction by burning of flint implements and other objects. Burnt, decorated daub from house walls emphasizes the special character of these buildings. The finds from Vasagård include hundreds of 'sun stones', small slabs of shale most of which are decorated with sun motives. Two stones with cup marks were found in contexts dating to respectively MN AIII and MN AV, indicating for the first time that cup marks were carved into stones as early as during the TRB Culture. Activities at the palisade enclosures came to an end ca. 2800BCE. On Bornholm, MN AV is followed by a later and final stage of the TRB Culture in MN BI, which is represented by the settlements Limensgård and Nordre Grødbygård and to some degree also Rispebjerg, the second site with palisade enclosures found on Bornholm. [ABSTRACT FROM AUTHOR]

These days, most machine tools are interlocked by an enclosure for safety control. At that time, internal heat generation in machine tools first causes thermal deformation of the machine structure, which reduces the machining accuracy of the workpiece. Furthermore, the internal heat generation heats the air inside the enclosure, causing a heat build-up phenomenon, and the trapped heat causes re-thermal deformation of the machine tool structure. As a result, machine tools with enclosures are subject to extremely complex thermal deformation. On the other hand, we would like to use FEM thermal simulation to study thermal deformation countermeasures for machine tools with enclosures at the design stage, but it is difficult to analyse the heat build-up phenomenon using conventional FEM thermal simulation. In this research, the new FEM thermal simulation technology for the heat build-up phenomenon was developed and heat build-up phenomenon in a CNC lathe with enclosure was calculated using the proposed FEM simulation technology. As a result, it had been concluded that the proposed FEM simulation could calculate with high accuracy for the phenomenon of heat build-up in a CNC lathe with enclosure, and the proposed technology is very effective in the design. [ABSTRACT FROM AUTHOR]

Shrub encroachment threatens grassland ecosystem services including herbaceous plant diversity, productivity, and overall grazing capacity. Hence, various shrub control methods including mechanical removal and herbicides are applied to restore herbaceous vegetation. However, the knowledge regarding the outcomes of integrated shrub management on herbaceous vegetation is limited. We investigated herbaceous vegetation responses after 7 years following the integration of shrub control and herbivory at Telperion Nature Reserve, Mpumalanga Province, South Africa. In a split-plot experiment using four enclosures and non-enclosures as main plots, we randomly assigned each of the following treatments in four 4 χ 4-m subplots in each main plot: 1) foliar metsulfuron-methyl herbicide, 2) 50% mechanical shrub removal, 3) 100% removal, and 4) no removal (untreated controls). A one-off Seriphium plumosum removal and the application of species-specific herbicide were conducted in 2015. Shrub control by herbivory interaction was significant (p < 0.05) for herbaceous canopy cover, basal cover, density, and species richness. The effects of herbivory were significant (p < 0.05) in the 50% removal treatment, increasing herbaceous plant diversity, density, and richness to the same level as 100% removal and herbicide treatments. In enclosures, however, the 50% shrub removal treatment attained relatively low herbaceous plant cover, density, species diversity, and richness compared to the herbicide treatment. Overall, this study revealed that herbivory and shrub control interact to facilitate herbaceous vegetation restoration, with 50% shrub removal by herbivory combination showing potential for management of S. plumosum-encroached grasslands. [ABSTRACT FROM AUTHOR]

Politicians and mainstream media in the EU, UK, and US regularly emphasize the need for highly skilled migrants, but, over the last few decades, the terms and conditions for these highly skilled migrants have changed drastically. As part of the neoliberal migrant control regime, highly skilled migrants are brought to countries under very restrictive conditions. They work and contribute taxes but have few to no political rights. Based on data on highly skilled Indian migrants in the US during the pandemic, we argue that highly skilled "nonimmigrants" are placed within a thicket of laws and policies that act as enclosures, but these seemingly neutral enclosures remain "hidden in plain sight" because of the silence about their near‐indentured life conditions. [ABSTRACT FROM AUTHOR]

Politicians and mainstream media in the EU, UK, and US regularly emphasize the need for highly skilled migrants, but, over the last few decades, the terms and conditions for these highly skilled migrants have changed drastically. As part of the neoliberal migrant control regime, highly skilled migrants are brought to countries under very restrictive conditions. They work and contribute taxes but have few to no political rights. Based on data on highly skilled Indian migrants in the US during the pandemic, we argue that highly skilled "nonimmigrants" are placed within a thicket of laws and policies that act as enclosures, but these seemingly neutral enclosures remain "hidden in plain sight" because of the silence about their near‐indentured life conditions. [ABSTRACT FROM AUTHOR]

Envelopes are an important topic in the study of architecture and urbanism and have a profound impact on our daily lives. They form boundaries, edges, enclosures and joints with ecological, territorial and representational functions that have social, cultural, economic, technological, environmental and political significance. Referring to warnings about capsular civilisation, this paper promotes the metaphorically telling concept of capsularity, in order to overcome terminological inconsistency as a characteristic phenomenon that denotes enclosures at different scales. It includes both capsules as small-scale cellular units on an architectural or industrial design scale - referred to as units of individual capsularity - and extended structures and territorial enclosures as manifestations of collective capsularity. Furthermore, a typology of collective capsularity is proposed. While complete and permeable envelopes entail physical spatial demarcation, diffuse envelopes are based on a technological system of control and surveillance. However, diffuse envelopes also complement both complete envelopes and permeable envelopes, forming masked capsular hybrids. After contextualising the proposed typology according to accessibility and its representation, the ambivalences of collective capsularities are considered through the lens of three selected and distinctive co-existing effects: Freedom/Control, Reality/Simulation and Seclusion/Exclusion. These effects present the concept and associated discourse as critical, pertinent and stimulating for imagining, inventing, proposing and implementing democratic, participatory and caring urban(istic) activities. The exposed typology and narratives of antagonisms involved in the operation of capsularities propose further research, policy development and planning directed towards the decapsularisation of contemporary space and promote democratic and caring possibilities for urban living in the future. [ABSTRACT FROM AUTHOR]

Copyright of MEMLEKET: Politics & Administration / Siyaset Yönetim is the property of Local Governments Research, Assistance & Education Association and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Shrub encroachment threatens grassland ecosystem services including herbaceous plant diversity, productivity, and overall grazing capacity. Hence, various shrub control methods including mechanical removal and herbicides are applied to restore herbaceous vegetation. However, the knowledge regarding the outcomes of integrated shrub management on herbaceous vegetation is limited. We investigated herbaceous vegetation responses after 7 years following the integration of shrub control and herbivory at Telperion Nature Reserve, Mpumalanga Province, South Africa. In a split-plot experiment using four enclosures and non-enclosures as main plots, we randomly assigned each of the following treatments in four 4 × 4-m subplots in each main plot: 1) foliar metsulfuron-methyl herbicide, 2) 50% mechanical shrub removal, 3) 100% removal, and 4) no removal (untreated controls). A one-off Seriphium plumosum removal and the application of species-specific herbicide were conducted in 2015. Shrub control by herbivory interaction was significant (p < 0.05) for herbaceous canopy cover, basal cover, density, and species richness. The effects of herbivory were significant (p < 0.05) in the 50% removal treatment, increasing herbaceous plant diversity, density, and richness to the same level as 100% removal and herbicide treatments. In enclosures, however, the 50% shrub removal treatment attained relatively low herbaceous plant cover, density, species diversity, and richness compared to the herbicide treatment. Overall, this study revealed that herbivory and shrub control interact to facilitate herbaceous vegetation restoration, with 50% shrub removal by herbivory combination showing potential for management of S. plumosum-encroached grasslands.

Ongoing research in the Balkans is revealing the importance of Early Neolithic ditches that enclosed settlements. As the research continues, more information is being uncovered about the ditches. The initial settlement at Aşağı Pinar, layer 7, also features ditches, with two ditches and associated pits found in the last two phases of this layer. However, none of these ditches had any association with settlement units. The stratigraphy and context of the fills suggest a refilling process was involved. The stratification of the fills, along with a large quantity of pottery sherds found in the fills and other finds, strongly suggest that a complex activity involving material culture led to the refilling process. This paper discusses the refilling processes and the purposes of the ditches in the context of Aşağı Pınar. Evidently, the Neolithic ditches were part of a more intricate activity than a mere enclosure system in the beginning of the Neolithic in Balkans.

This paper focuses on a new addition to the English protected seascape: Highly Protected Marine Areas (HPMAs). HPMAs hold an important value for meeting pressing conservation targets and for studying the interaction between biodiversity conservation and climate change. By prohibiting extractive, destructive and depositional uses, they are test sites for understanding the resilience of marine ecosystems. However, HPMAs are not neutral tools but are highly political, as they limit sea-users' access to marine resources. Being strict reserves, they can be contested and perceived as enclosures. The way in which HPMAs are framed in law and policy has important implications for the effectiveness and social acceptability of these sites. This paper, employing the analytical categories of new commons and commoning, explores the way in which English law and policy are framing HPMAs asking whether they are contributing to a perception of HPMAs as enclosures. [ABSTRACT FROM AUTHOR]

Copyright of Cuadernos de Arqueología de la Universidad de Navarra is the property of Cuadernos de Arqueologia de la Universidad de Navarra and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper looks at the cluster of phenomena that aggregates into what has been called a crisis of time, where experiences of time have become at once stretched to perpetuity and compressed to negligibility. The former results from the perceived endurance of digital media that feign everlasting memory and recall, whilst the latter is due to the speeds at which information is processed, making wait times feel intolerable. In either case, digital technologies have seemingly rendered time into something unrecognisable on a human scale. Whilst there are several competing theories on elements that contribute to this, such literature has largely been confined to the discourse on speed, acceleration, and standardisation. What has been so far overlooked is the logic of optimisation, a mode of operation that is endemic to digitality. Optimisation, which captures aspects of digitality that exceed the scope of efficiency, is particularly insidious within the digital milieu due to the abstraction necessitated by digital processes. I analyse optimisation as it surfaces in capitalist history in the form of land privatisation and imperialism, tracing it through to the digital milieu, producing what I term “time enclosures”. This term parallels the land enclosures that were the historical preconditions of capitalism in order to articulate a specific element of privatisation and commercial value in the crisis of time. Finally, I relate optimisation to the entwined values and histories of imperialism that are premised on linearity and progress to explore the thread that corrupts our sense of time through digital technology’s effects on retention and protention.

Colombia is considered a pioneer in inclusive recycling in Latin America and the state-led formalisation policies are considered a referent for the socio-economic inclusion of waste pickers beyond the region. Nevertheless, more than 60,000 waste pickers in Colombia are struggling to remain in place despite these inclusive recycling and formalisation policies. This paper examines the implementation of formalisation policies and their consequences for the population of waste pickers by comparing evidence from two Colombian cities: Bogotá and Cartagena de Indias. The paper draws on extensive qualitative community-based research methodology with waste pickers in both cities guided by an interdisciplinary epistemological position to support Colombian waste pickers' political struggle for recognition from a theoretical reflection. This paper shows how formalisation policies became a mechanism of manifold dispossessions in both cities. This paper categorises three forms of enclosures faced by waste pickers: (a) material and socio-economic; (b) bodily and spatial; and (c) political and organisational. Finally, this paper concludes by urging to consider the situated social, political, and cultural facets of waste pickers' labour to enhance grassroots reflections on how to achieve greater levels of social justice and inclusion. [ABSTRACT FROM AUTHOR]

4th Industrial Revolution technologies that blur the lines across physical, digital and biological domains have entered seed systems. The digitalisation of seeds' DNA is generating the unstoppable growth of big data on digital sequence information (DSI). The paper analyses the legal vacuum for DSI, which aggravates the dematerialisation and fragmentation of seed, rendering it easier to control under legal, technological, social and logistical enclosures. Open-source seed is explored as a governance mechanism across physical and digital spheres. DSI emerges as a critical juncture for seed movements, revealing how the construction of seed and food sovereignty is a digital and technological affair. [ABSTRACT FROM AUTHOR]

The article presents the excavation materials of a series of Turkic enclosures of the Kudyrge complex located in the Eastern Altai. These objects were investigated by the expedition under the leadership of A.S. Vasyutin in 1982. A detailed description of the studied early medieval enclosures was made based on the information presented in the reporting documentation on the results of excavations. An analysis of the recorded features of the structures, as well as the discovered objects, became the basis for the conclusion on the dating of structures within the second half of the 5th–6th centuries AD and attributing them to the initial stages in the development of the Turkic archaeological culture. It was established that the materials reflect both local traditions related with the nomads of the Syanbi-Rouran time and innovations that indicate the arrival of a new population group in the territory under consideration. Published objects, as well as other complexes, demonstrate the necessity of further field studies of the sites in East Altai dated by the pre-Turkic and Early Turkic periods for the reconstruction of complicated processes of cultural genesis in the Central Asian region in the middle of the 1st millennium AD.

Mining of the global commons in the deep seabed and outer space is grow-ing in technological and economic feasibility. Concurrently, we have in-creasing scientific knowledge of the environmental and social risks in-volved. Is the concept of the global commons and the related international law principle of the common heritage of humankind useful for negotiating such risks? Can this principle overcome its disciplinary legacy of strong mercantilist values and make an evolutionary turn towards greater ecologi-cal and social consciousness? To answer these questions, this reflection examines the role of the commons, corporations, and European empire in the creation of international law as well as environmental crises. It con-cludes that to overcome disciplinary legacies of imperialism and corporate greed, it would be helpful to conceive of international law as itself a global commons. Rather than Eurocentric values writ large, an international law where all cultures could participate on their own terms makes space for more sustainable and equitable legal traditions to reshape the global order. [ABSTRACT FROM AUTHOR]

Research on migration in arrival cities, particularly in the west, has traditionally focused on spatial formations such as 'ethnic enclaves' or 'immigrant neighbourhoods' in order to investigate questions around assimilation, integration and settlement issues relating to more permanent forms of migration. By shifting attention to the cities of migration in Asia that operate largely under a regime of temporary migration, we foreground the twin concepts of enclavisation and enclosure not as fixed entities but as ongoing spatial-temporal strategies of disciplinary power with uneven consequences for migrant life and labour in the city. Set within the context of Singapore, we draw on qualitative interviews with two groups of transient migrant workers – male construction workers and female domestic workers – to examine two sets of conjoined processes underpinning their spatial containment in the city-state: ground-driven enclavisation or the formation of 'weekend enclaves' /gathering grounds as co-national social spaces of support and comfort zones of co-ethnic belonging; and state-driven enclosure in dormitories or home-workspaces as a set of containment measures in response to gender-differentiated concerns about enclavisation. As spatial–temporal processes that shape the migrant's place in, and mobility through, the city in highly gendered and disciplined ways, enclavisation and enclosure work in tandem to reinforce the non-integration of low-waged transient migrants in the city. [ABSTRACT FROM AUTHOR]

This article presents the current state of research on the Early Neolithic settlement enclosures in the Eastern Balkans (ca. 6200/6000–5500 cal. BC), with a focus set on the ditch-digging practices. A large database was accumulated in the last decade during surface surveys, large-scale excavations, and geomagnetic prospection, demonstrating conclusively that ditch enclosures were indeed a tradition rather than an exception. In the Eastern Balkans, enclosures consist mostly of single or multiple ditches and rarely a combination of ditch and wooden, emplectum, or a stone wall. Moreover, some sites existed long enough that the development of the settlement pattern demanded also changes in the enclosures’ layout and/or design. Most of the settlements were enclosed as early as their initial stages. However, no enclosure features have been identified at the earliest Neolithic sites in the area even though this might reflect biased research strategies.

This article is a case study from the Hebron Offshore Oil Platform located in Atlantic Canada focusing on fire-resistant medium-voltage enclosures that were supplied for the seawater lift pumps and fire water pumps. The purpose of this article is to show where fire-resistant enclosures may be utilized and to detail the testing involved in achieving fire resistance with the enclosures for the Hebron Platform. [ABSTRACT FROM AUTHOR]

Copyright of Roca: Revista Científico-Educacional de la Provincia de Granma is the property of Universidad de Granma, Departamento Editorial and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Starting from the analysis of Marx's Chapter 26 of the first volume of Capital, this article describes Marxian emphasis on the extremely violent aspects—a list of the main cases is also provided—of the so-called "enclosures" as fundamental procedures that favored the "primitive accumulation", that is, the first social and economic step that led to capitalism. The "enclosures" that characterized the primitive accumulation process, violently expropriating peasants, razing their cottages and dwellings, are illustrated in detail. At the same time, we will describe what we call the "moral bubble", created by the narratives—morally edifying—about enclosures, only devoted to the emphasis on the positive economic and social outcomes: the moral bubble acts as a powerful conceptual device capable of concealing the violence that accompanies enclosures. The second part of the article stresses the fact that the mechanism of enclosures can be traced back not only to violently expropriating common lands in which the peasants flourished but also to the violent processes against women to have them basically reduced to machines for the production of new workers, in the framework of the new "patriarchy of the wage". The importance of the so-called "new enclosures" is further delineated after having shown how enclosures express the historical and general tendency of capitalistic accumulation and not only of the primitive one. The violent aspects of primitive accumulation, and so of primitive enclosures, are described as the main characters of every phase of the recent capitalist globalization, marked by continuous and unprecedented assault (as smart social, political, and economic mechanisms for producing enclosures) on the commons, perpetrated by the World Bank, the International Monetary Fund, coronavirus lockdown and, currently, also by the paradoxical economic effects of the interplay between the green era and Ukraine war–global food and energy crisis. Finally, the last section provides insight on what we called the "terminal enclosure" related to the aggression of the ultimate common good: water. [ABSTRACT FROM AUTHOR]

This article draws on the work of Raymond Williams to argue that under covid-19 the dominant 'ways of seeing' the countryside and the city in Britain are working to obscure the structural violence of capitalism. Cultural narratives of 'exodus' from the city abound in British media, fuelling a material 'race for space' as the middle class rush to buy up rural properties. The 'cottagecore' social media aesthetic has proliferated, offering privatized solutions to the crisis through nostalgic imagery of pastoral escape. At the same time, nineteenth-century discourses of dark, diseased cities have been rearticulated, providing ideological support for racist migration policies. Exploited migrant workers in Leicester are framed as 'modern slaves' in the city's 'dark factories'; their bodies are transcoded as 'dirt' which must be 'rooted out' of the nation. We argue that these binary narratives and aesthetics of a bountiful, white countryside and an infested, racialized city lead to an 'unseeing' of the deep structural causes of inequality. We develop Williams's analysis to show how these cultural imaginaries also sustain the gendered and racialized division of labour under capitalism, arguing that the country-city distinction, and the material injustices it obscures, ought to become a central focus for cultural studies. [ABSTRACT FROM AUTHOR]

Environmental enrichment seeks to improve the quality of care for animals in captivity through the constant generation of new sources of stimuli to simulate a complexand changing environment. Salvator merianae is a species of large lizard whose native distribution covers the subtropical and humid zones of southeastern South America. The study was carried out in the Experimental Lizard Hatchery belonging to the Facultad de Agronomía y Zootecnia from Universidad Nacional de Tucumán, UNT for its initials in Spanish. Two pens were used, a control group R1 (Enclosure 1) and an experimental group R2 (Enclosure 2), where data were taken ithout enrichment (R2 W/O-E) and with enrichment (R2 WE). An ethogram was used to record the different behaviors that were then grouped into eight categories to evaluate how animals spend their time. Behaviors were recorded on video, the applied technique was the focal animal sampling with instantaneous recording, the extracted data were ex- ported into individual spreadsheets. The Landau index was calculated to determine the existence of hierarchies. The data suggest that the modification of the enclosure conditions has the capacity to alter the behavioral profiles. Only a few behavioral categories showed significant differences. No significant differences were found, in the frequency of the behavioral categories, between males and females. There was a decrease in the frequency of reproductive behavior in males in R2. There was a non-linear hierarchy among the individuals. A ecrease in the chases was observed among individuals in R2.

Most studies concerning parasitic infections in European bison have been performed on free-ranging animals: comparatively little is known about the abomasal nematodes of captive wisents, which are widely used in reintroduction programmes. The aim of the study was to determine the infection level and species composition of abomasal nematodes in captive European bison in enclosures (including zoos) and breeding centres compared to free-ranging individuals. It also includes a morphological analysis of the parasites based on figures and measurement data. Altogether, 11 species of nematodes were detected, with both captive and free-ranging animals demonstrating similar species compositions. Among those, 2 species of blood-sucking nematodes were detected, including Ashworthius sidemi and Haemonchus contortus . Interestingly, A. sidemi was found in almost all free-roaming animals, but only in 1 captive European bison. In addition, H. contortus was predominant in captive animals. The morphological identification was confirmed molecularly for 5 nematode species: A. sidemi , H. contortus , Ostertagia kolchida , O. ostertagi and Spiculopteragia boehmi . The identification was performed using small subunit ribosomal rDNA. The study provides the first available set of specular lengths of the gastric nematodes of European bison, and the first molecular data of O. kolchida and S. boehmi derived from the same host species. Our findings may simplify the morphometrical and molecular identification of Trichostrongylidae species infecting European bison, and can be useful in developing new management strategies for populations of this near-threatened species in Europe.

This article discusses how the first-person genre, especially a Gazan wartime diary, allows both writer and reader to imagine new possibilities for understanding contemporary colonial drone warfare, which is instrumental in the strategic silencing and invisibilization of war victims. By creating this zone of invisibilization (one that I will name the "dronesphere") through obfuscating loss of life, war perpetrators aim to drown out the voices of opposition and resistance in Gaza. This is precisely why an increasing autonomy of military technologies that I call the "anthropomorphizing of drones" has triggered fierce debates over the unaccountability for war crimes committed against those on the receiving end of such autonomous weaponry. One specific case that deserves serious attention in this regard is the deafening silence surrounding Israel's use of lethal drones to assassinate people in Palestine, which has led to the strategic silencing and invisibility of Palestinian deaths and a struggle for survival through the use of top-down control via drones in the region. However, Atef Abu Saif's use of "strategic anthropomorphism" in his wartime diary The Drone Eats with Me: A Gaza Diary does not grant the drone absolute autonomy in death-dealing but imagines Drone as a fictional character. Instead, the execution of Gazans is presented as a prolonged reconnaissance performance, which not only allows Gazans to see drones as an extension of (absent) drone operators' bodies, but also to register their protest against the Israeli authorities by imagining Drone as a living entity. Therefore, using the authority of direct experience that Youval Noah Harari calls "flesh witnessing" (2008), Abu Saif's wartime diary enables the formation of Palestinian subjectivities held under the sign of erasure, thereby claiming their rights as social and political human bodies. [ABSTRACT FROM AUTHOR]

This study analyzed that the penetration of electromagnetic waves through an unknown opening in a large enclosure generated standing waves within the enclosure, thereby reducing its shielding characteristics. A 3D numerical analysis confirmed that the shielding performance can be improved by using electromagnetic absorbers to reduce the standing wave. This was verified experimentally. [ABSTRACT FROM AUTHOR]

Understanding trade‐offs associated with occupying various aquatic habitats provides a mechanistic understanding of habitat needs that can be used to evaluate the consequences of habitat loss or alteration. We used instream enclosures and field observations to identify how velocity affects the growth rates of four native species in the upper Gila River basin: longfin dace (Agosia chrysogaster) and speckled dace (Rhinichthys osculus), two species of no conservation concern, and loach minnow (Tiaroga cobitis) and spikedace (Meda fulgida), two federally endangered species. Elevated velocity was predicted to increase food delivery through drift or stimulation of benthic primary production. Energetic costs of high‐velocity habitat were predicted to vary with morphology and behaviour and be lowest for speckled dace and loach minnow because they are adapted to occupy interstitial spaces of the substrate in riffles. Spikedace and longfin dace should perform best in moderate velocities, where the trade‐off between exposure to drifting macroinvertebrates outweighs the energetic costs of maintaining position in the water column. Growth rates of loach minnow and speckled dace increased in higher velocities, but contrary to our initial predictions, spikedace growth rates also increased in high‐velocity habitats while longfin dace grew fastest in low‐velocity habitats; similar to the locations these species occupied based on field observations. These results indicate that for spikedace, the increased abundance of drifting macroinvetebrates in high‐velocity habitats outweighs the energy expenditure, but for longfin dace the energetic costs of occupying moderate to high‐velocity habitats outweigh the benefit to increased food availability. Our experiment provides a mechanistic understanding of habitat requirements across species and may inform predictions on how modifications or restoration of riverine ecosystems influence native fish diversity. [ABSTRACT FROM AUTHOR]

Copyright of Acta Zoologica Lilloana is the property of Fundacion Miguel Lillo and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The article offers a glimpse into the potential of a series of recent LiDAR based explorations, in cases combined with geophysical prospections, pin-pointed excavation and radiocarbon dating of enclosures, to contribute to the better understanding of the anthropic modified relief morphology and layout of several hill-top sites from South-Eastern Transylvania dated in the Bronze and Iron Ages. The study area, which is mostly forested, gathers one of the largest concentrations of Late Prehistory and Protohistory earthworks known on the territory of modern Romania. The presented data opens the pathway for the further exploration of relevant themes such as: diversity of the functions played by enclosures, the sites’ level of interconnectivity and the existence of hierarchies. It also points out the general need for establishing more accurately the earthworks’ chronology, topography and occupation intensity.

The IEC 61000-4-21 and IEEE 299.1 documents report similar but not equal procedures to measure the shielding effectiveness (SE) of enclosures through the use of reverberation chambers. In this article, it is shown that these two measurement procedures can be merged in a single, enhanced, one. In particular, it is shown that the evaluation of the SE of enclosure in Annex H of IEC 61000-4-21, which exploits only mechanical stirring, can be improved by using the hybrid stirring, which includes also the frequency stirring, thus increasing the number of uncorrelated samples. On the other hand, it is shown that at low frequencies the evaluation of the SE of enclosures based on the definition in IEEE 299.1 can be improved through the use of the maximum values of measured powers rather than the average ones. The single, enhanced, proposed procedure provides more prudent SE values than the two standards at the low frequencies, especially for standard IEEE 299.1. The presented measurement approach is supported by results obtained in three different laboratories. [ABSTRACT FROM AUTHOR]

Generally, most of the electronic equipments need a metallic enclosure in order to mechanically protect and electrically shield the interior printed circuit boards (PCBs) and subsystems. But in practical situations, the apertures or slots of various forms are essential parts of the shielding enclosure for thermal dissipation, CD-ROMs, connectors, I/O cabling and so on. The performance of shielding enclosures for high-speed digital systems is compromised by these inevitable discontinuities on enclosure. To minimize the electromagnetic interferences and susceptibility risks by these discontinuities, the shielding enclosures with apertures should be designed based on thorough analysis about the electromagnetic coupling mechanism through apertures. In this paper, the effect of apertures and oblique incident plane wave on shielding effectiveness of the enclosure is studied with the Circuital Approach, and the Finite-Difference Time-Domain (FDTD) method, the simulated SE data are verified by experimental technique. Good agreements are found between these approaches.

This study evaluated the effects of exclsoures (EXs) on restoring woody species diversity and carbon stocks over the adjacent degraded open grazing land (DOGL). Two proximate sites were purposively selected. Then, systematic sampling method was employed. A total of sixty plots were surveyed for both tree/shrub inventory and soil sampling purposes. Overall, 49 woody species belonging to 45 genera and 28 families were identified, it comprising 46 woody species in the EX and 26 woody species in the DOGL. Species richness, Shannon and Simpson diversity indices were significantly higher in the EXs than DOGL. The total carbon stock was significantly higher in EXs (61.3 Mg C ha−1, it ranged from 54.3 to 68.3 Mg C ha−1) than DOGL (40.4 Mg C ha−1, it ranged from 35.1 to 45.7 Mg C ha−1). The conversion of the DOGL to EXs enhanced soil organic carbon and aboveground biomass carbon stock by 38 and 197% at the age of 12 years, respectively. Woody species diversity, abundance and richness were positively correlated with biomass and soil organic carbon stocks. This study revealed that EXs assisted with enrichment planting can be considered as a viable woody species recovery and carbon sequestration strategy. Abbreviations: EXs: Exclosures; DOGL: Degraded open grazing land: REDD+: Reduce Emissions from Deforestation and Forest degradation plus; SOC: Soil organic carbon; dbh: Diameter at breast height; AGB: Aboveground biomass; BGB: Belowground biomass.