Overview of the PALM model system 6.0

In this paper, we describe the PALM model system 6.0. PALM (formerly an abbreviation for Parallelized Largeeddy Simulation Model and now an independent name) is a Fortran-based code and has been applied for studying a variety of atmospheric and oceanic boundary layers for about 20 years. The model is optimized for use on massively parallel computer architectures. This is a follow-up paper to the PALM 4.0 model description in Maronga et al. (2015). During the last years, PALM has been significantly improved and now offers a variety of new components. In particular, much effort was made to enhance the model with components needed for applications in urban environments, like fully interactive land surface and radiation schemes, chemistry, and an indoor model. This paper serves as an overview paper of the PALM 6.0 model system and we describe its current model core. The individual components for urban applications, case studies, validation runs, and issues with suitable input data are presented and discussed in a series of companion papers in this special issue

The other veterans: Socialist humanitarians return to Vietnam

This essay examines alternative circuits of memory of the "American War" and the return of other "veterans" to postwar Vietnam; namely, socialist experts from East Germany who contributed to war efforts and urban reconstruction in the 1970s. It follows a delegation of experts who returned in 2007 to the devastated city of Vinh, which they had helped to rebuild. The motivations and itineraries of these returnees diverged from the typical agendas of "war tourists," including the return journeys of U.S. veterans. For the socialist humanitarians, returning to Vietnam offered an opportunity for important memory work within and across former Cold War divisions

Reclaiming rights to the socialist city: Bureaucratic artefacts and the affective appeal of petitions

A long history of war and revolution in the industrial city of Vinh has perpetuated cycles of mass destruction followed by urban renewal. This paper examines citizen responses to the shift from post-war socialist urbanization that sought to eradicate inequality to post-reform city planning that advocates private property. It asks: how do urban residents at risk of relocation articulate their rights to the post-socialist city? Tracing the use and circulation of bureaucratic artefacts between citizens, developers and the state, it shows how government documents, far from being mere tools of state regulation, are productive of active, participatory subjectivities and a growing sense of moral-political agency. This agency manifests itself in the collective act of petitioning through which residents contest urban redevelopment and the withdrawal of the state by employing the language of tình cam (sentiment) as an affective tool and logic of bureaucratic rationality

The other veterans: Socialist humanitarians return to Vietnam

This essay examines alternative circuits of memory of the "American War" and the return of other "veterans" to postwar Vietnam; namely, socialist experts from East Germany who contributed to war efforts and urban reconstruction in the 1970s. It follows a delegation of experts who returned in 2007 to the devastated city of Vinh, which they had helped to rebuild. The motivations and itineraries of these returnees diverged from the typical agendas of "war tourists," including the return journeys of U.S. veterans. For the socialist humanitarians, returning to Vietnam offered an opportunity for important memory work within and across former Cold War divisions

Spectacular infrastructure and its breakdown in socialist Vietnam

No material resource and public good is more critical to sustaining urban life than water. During postwar reconstruction in Vietnam, planners showcased urban infrastructure as a spectacular socialist achievement. Water-related facilities, in particular, held the potential for emancipation and modernity. Despite East German-engineered systems, however, taps remained dry in socialist housing. Lack of water exposed existing hierarchies that undermined the goal of democratic infrastructure yet enabled new forms of solidarity and gendered social practice to take shape in response to the state's failure to meet basic needs. Infrastructural breakdown and neglect thus catalyzed a collective ethos of maintenance and repair as the state shifted responsibility for upkeep to disenchanted tenants. I track these processes in a housing complex in Vinh City, where water signified both the promises of state care and a condition of its systemic neglect. [materiality, infrastructure, socialist modernity, urbanization, decay, maintenance and repair, water, Vietnam] No material resource and public good is more critical to sustaining urban life than water. During postwar reconstruction in Vietnam, planners showcased urban infrastructure as a spectacular socialist achievement. Water-related facilities, in particular, held the potential for emancipation and modernity. Despite East German-engineered systems, however, taps remained dry in socialist housing. Lack of water exposed existing hierarchies that undermined the goal of democratic infrastructure yet enabled new forms of solidarity and gendered social practice to take shape in response to the state's failure to meet basic needs. Infrastructural breakdown and neglect thus catalyzed a collective ethos of maintenance and repair as the state shifted responsibility for upkeep to disenchanted tenants. I track these processes in a housing complex in Vinh City, where water signified both the promises of state care and a condition of its systemic neglect

Spectacular infrastructure and its breakdown in socialist Vietnam

No material resource and public good is more critical to sustaining urban life than water. During postwar reconstruction in Vietnam, planners showcased urban infrastructure as a spectacular socialist achievement. Water-related facilities, in particular, held the potential for emancipation and modernity. Despite East German-engineered systems, however, taps remained dry in socialist housing. Lack of water exposed existing hierarchies that undermined the goal of democratic infrastructure yet enabled new forms of solidarity and gendered social practice to take shape in response to the state's failure to meet basic needs. Infrastructural breakdown and neglect thus catalyzed a collective ethos of maintenance and repair as the state shifted responsibility for upkeep to disenchanted tenants. I track these processes in a housing complex in Vinh City, where water signified both the promises of state care and a condition of its systemic neglect. [materiality, infrastructure, socialist modernity, urbanization, decay, maintenance and repair, water, Vietnam] No material resource and public good is more critical to sustaining urban life than water. During postwar reconstruction in Vietnam, planners showcased urban infrastructure as a spectacular socialist achievement. Water-related facilities, in particular, held the potential for emancipation and modernity. Despite East German-engineered systems, however, taps remained dry in socialist housing. Lack of water exposed existing hierarchies that undermined the goal of democratic infrastructure yet enabled new forms of solidarity and gendered social practice to take shape in response to the state's failure to meet basic needs. Infrastructural breakdown and neglect thus catalyzed a collective ethos of maintenance and repair as the state shifted responsibility for upkeep to disenchanted tenants. I track these processes in a housing complex in Vinh City, where water signified both the promises of state care and a condition of its systemic neglect

Reclaiming rights to the socialist city: Bureaucratic artefacts and the affective appeal of petitions

A long history of war and revolution in the industrial city of Vinh has perpetuated cycles of mass destruction followed by urban renewal. This paper examines citizen responses to the shift from post-war socialist urbanization that sought to eradicate inequality to post-reform city planning that advocates private property. It asks: how do urban residents at risk of relocation articulate their rights to the post-socialist city? Tracing the use and circulation of bureaucratic artefacts between citizens, developers and the state, it shows how government documents, far from being mere tools of state regulation, are productive of active, participatory subjectivities and a growing sense of moral-political agency. This agency manifests itself in the collective act of petitioning through which residents contest urban redevelopment and the withdrawal of the state by employing the language of tình cam (sentiment) as an affective tool and logic of bureaucratic rationality