Estimation of Mean Radiant Temperature in Urban Canyons Using Google Street View: A Case Study on Seoul

Extreme heat exposure has severe negative impacts on humans, and the issue is exacerbated by climate change. Estimating spatial heat stress such as mean radiant temperature (MRT) is currently difficult to apply at city scale. This study constructed a method for estimating the MRT of street canyons using Google Street View (GSV) images and investigated its large-scale spatial patterns at street level. We used image segmentation using deep learning to calculate the view factor (VF) and project panorama into fisheye images. We calculated sun paths to estimate MRT using panorama images from Google Street View. This paper shows that regression analysis can be used to validate between estimated short-wave, long-wave radiation and the measurement data at seven field measurements in the clear-sky (0.97 and 0.77, respectively). Additionally, we compared the calculated MRT and land surface temperature (LST) from Landsat 8 on a city scale. As a result of investigating spatial patterns of MRT in Seoul, South Korea, we found that a high MRT of street canyons (>59.4 °C) is mainly distributed in open space areas and compact low-rise density buildings where the sky view factor is 0.6–1.0 and the building view factor (BVF) is 0.35–0.5, or west-east oriented street canyons with an SVF of 0.3–0.55. However, high-density buildings (BVF: 0.4–0.6) or high-density tree areas (Tree View Factor, TVF: 0.6–0.99) showed low MRT (<47.6). The mapped MRT results had a similar spatial distribution to the LST; however, the MRT was lower than the LST in low tree density or low-rise high-density building areas. The method proposed in this study is suitable for a complex urban environment consisting of buildings, trees, and streets. This will help decision makers understand spatial patterns of heat stress at the street level.

Community Policing: Misunderstanding and Misapplication Following Police Shootings

Prevailing community policing theory identifies the purpose of community policing being to empower state policing not diminish it. This basis identifies a major misconception of those arguing for police defunding, as it fails to address the realities and limitations of street-level bureaucrats in exercising their authority. Misapplying emotional calls for restructuring into perceived democratic control of the bureaucracy. This article explores the inherent problems within community policing and serves to link these problems within a larger discussion of governance and policing, making an argument that the calls for defunding and community policing at best demonstrate misunderstanding and at worst represent a poorly articulated political ploy. In either case, understanding the larger role of how the state legitimates policing identifies an inherent disconnect between policy and implementation. Substantive change in policing must come from changes in the law that provide the staying power for reform to overcome bureaucratic retrenchment to change and in our view of governance, specifically in what should be enforced and the role of government in maintaining order, to ensure that these reflect the realities of policing.

The Street-Level Organisation in-between Employer Needs and Client Needs: Creaming Users by Motivation in the Norwegian Employment and Welfare Service (NAV)

Employer engagement is increasingly emphasised in the context of efforts to bring more disadvantaged people into work. A new approach in the Norwegian Employment and Welfare Service (NAV) combines demand-side and supply-side measures in a ‘combined workplace-oriented approach’. Through qualitative interviews with frontline staff – including job coaches following the Supported Employment (SE) method – the paper examines the intermediary role of the street-level organisation (SLO) through the targeted use of SE methods directed at young users and employers. The findings suggest that young users are ‘creamed by motivation’ into the SE programme, which can be explained by the importance the SLO places: on maintaining inter-organisational relationships with employers, on job coaches’ performance goals and the need to uphold an organisational structure in the SLO that seemingly works efficient to shift caseloads of young unemployed into work. Hence, creaming is not specific to outsourcing but can also occur when insourcing employer engagement services into a public SLO. Although relational work directed at both employers and young clients is seen as the benefit of a combined workplace-oriented approach, it appears a rather flimsy foundation for successful ALMPs unless supported by more structural demand-side measures.