scholarly journals Mapping the city scale anthropogenic heat emissions from buildings in Kuala Lumpur through a top-down and a bottom-up approach

2021 ◽  
pp. 103443
Author(s):  
Kai Wang ◽  
Yasemin D. Aktas ◽  
Liora Malki-Epshtein ◽  
Di Wu ◽  
Muhammad Firdaus Ammar Bin Abdullah
2009 ◽  
Vol 9 (17) ◽  
pp. 6305-6317 ◽  
Author(s):  
M. Zavala ◽  
S. C. Herndon ◽  
E. C. Wood ◽  
T. B. Onasch ◽  
W. B. Knighton ◽  
...  

Abstract. Mobile emissions represent a significant fraction of the total anthropogenic emissions burden in the Mexico City Metropolitan Area (MCMA) and, therefore, it is crucial to use top-down techniques informed by on-road exhaust measurements to evaluate and improve traditional bottom-up official emissions inventory (EI) for the city. We present the measurements of on-road fleet-average emission factors obtained using the Aerodyne mobile laboratory in the MCMA in March 2006 as part of the MILAGRO/MCMA-2006 field campaign. A comparison of our on-road emission measurements with those obtained in 2003 using essentially the same measurement techniques and analysis methods indicates that, in the three year span, NO emission factors remain within the measured variability ranges whereas emission factors of aldehydes and aromatics species were reduced for all sampled driving conditions. We use a top-down fuel-based approach to evaluate the mobile emissions from the gasoline fleet estimated in the bottom-up official 2006 MCMA mobile sources. Within the range of measurement uncertainties, we found probable slight overpredictions of mean EI estimates on the order of 20–28% for CO and 14–20% for NO. However, we identify a probable EI discrepancy of VOC mobile emissions between 1.4 and 1.9; although estimated benzene and toluene mobile emissions in the inventory seem to be well within the uncertainties of the corresponding emissions estimates. Aldehydes mobile emissions in the inventory, however, seem to be underpredicted by factors of 3 for HCHO and 2 for CH3CHO. Our on-road measurement-based estimate of annual emissions of organic mass from PM1 particles suggests a severe underprediction (larger than a factor of 4) of PM2.5 mobile emissions in the inventory. Analyses of ambient CO, NOx and CO/NOx concentration trends in the MCMA indicate that the early morning ambient CO/NOx ratio has decreased at a rate of about 1.9 ppm/ppm/year over the last two decades due to reductions in CO levels rather than by NOx. These trends, together with the analysis of fuel sales and fleet size, suggest that the relative contribution of diesel vehicles to overall NOx levels has increased over time in the city. Despite the impressive increase in the size of the vehicle fleet between 2000 and 2006, the early morning ambient concentrations of CO and NOx have not increased accordingly, probably due to the reported low removal rates of older vehicles, which do not have emissions control technologies, and partially due to the much lower emissions from newer gasoline vehicles. This indicates that an emission-based air quality improvement strategy targeting large reductions of emissions from mobile sources should be directed towards a significant increase of the removal rate of older, highly-polluting, vehicles.


Jurnal HAM ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 85
Author(s):  
Sabrina Nadilla

Upaya untuk membawa nilai-nilai Hak Asasi Manusia (HAM) ke tingkat lokal sudah mencuat sejak 1990-an, melalui berbagai konsep, salah satunya human rights in the city. Konsep tersebut menantang pendekatan HAM yang selama ini hanya terpusat pada negara, sehingga membuka ruang bagi ide bahwa implementasi nilai-nilai HAM harus ditangani oleh berbagai tingkatan pemerintahan, bukan lagi terbatas pada pemerintah pusat. Dalam konteks Indonesia, upaya melokalkan nilai-nilai HAM telah dilakukan melalui berbagai kebijakan hak asasi manusia. Kebijakan tersebut antara lain penghargaan kabupaten/kota peduli HAM yang diselenggarakan oleh Kementerian Hukum dan Hak Asasi Manusia, dan proyek Kota HAM Bandung. Kajian ini menggunakan pendekatan kualitatif yang berbasis pada studi kasus, analisis dilakukan dengan menerapkan konsep pendekatan hak asasi manusia (human rights-based approach) dalam kebijakan hak asasi manusia. Dalam perspektif pelokalan hak asasi manusia, kebijakan HAM di Kota Bandung menunjukkan beberapa indikasi. Pertama, kebijakan Deklarasi HAM Bandung sebagai suatu kebijakan berbasis hak asasi manusia yang bersifat bottom-up masih belum mampu mendukung upaya pelokalan HAM di kota Bandung. Kedua, kebijakan Penghargaan Kabupaten/Kota Peduli HAM sebagai suatu kebijakan yang bersifat top-down, meskipun mendapatkan respons positif dari pemerintah kota dan instansi vertikal sebagai bagian dari pelaksana kebijakan, tidak mendapatkan legitimasi yang cukup dari masyarakat kota Bandung. 


2020 ◽  
Vol 88 ◽  
pp. 119-150
Author(s):  
Penelope J. Goodman

Scholarship on the fourteen Augustan regions of Rome has tended to focus on their political and topographical significance. As a result, evidence for their social meaning and their impact on the mindsets and practices of the city's administrators and rulers has been under-exploited. This article seeks to address this lacuna. It begins by reviewing the history of Rome's regions and asking how and where the boundaries of the Augustan regions were recorded, before moving on to consider the impact of the regions on the Romans’ understanding and experiences of their city. This includes examining the evidence for bottom-up social identification with the regions, despite their top-down original creation. The paper also looks at the administrators who worked with the regions (regional magistrates and the food, water and fire services), arguing that the conceptual framework which the regions provided began to shape their working practices. Finally, it demonstrates the existence of a rhetoric of consistent provision across all fourteen regions, propagated especially by the emperors. The findings across all of these areas reveal that it is essential to take the regions and their impact into account when attempting to understand the topography of the city and the lives of its inhabitants.


2019 ◽  
Author(s):  
◽  
Ashvina Patel ◽  

This research examines the subjective experience of human security by Rohingya urban refugees who fled to New Delhi, India, from Myanmar, in 2012. It uses bottom-up, top-down, and historical-to-present approaches to recognize the myriad factors that influence the path to security. The bottom-up approach frames the Rohingya present-day experience; the top-down approach delineates motivations embedded in the current India state and the international refugee regime; and the past-to-present approach explains the perspectives of each of these actors. One urban refugee settlement was chosen as a primary field site to examine the challenges and varied everyday experiences of the city for migrants. Two other urban settlements were selected for supplementary participant observation and the collection of quantitative data. At my primary field site, Rohingya men and women were interviewed to assess their feeling of security (in Rohingya hefazat or in Hindi suraksha). The perceptions of United Nations High Commissioner for Refugees (UNHCR) employees, government officials, and community representative were also recorded. Human security, defined as a person-centered security, was assessed on three dimensions: political, economic, and community. Analysis of the data compelled me to focus on what I call political human security. Anthropologists theorize the embeddedness of new immigrants and resettled refugees through acts of cultural citizenship, assimilation, and integration. This study, however, demonstrates that for urban refugees their primary need is basic security. This security is inevitably political; Rohingya refugees are deemed “illegal” immigrants by the state, but are permitted to stay as protected wards of the UNHCR. They assume a refugee identity that both expose them to further exploitation, while also shielding them from starvation and disease. This politically formed identity must be negotiated in daily interaction in order to find security. India is a first country of asylum for the Rohingya in this study. No South Asian country has signed the 1951 Refugee Convention or its 1967 Protocol, making India a good case study for how South Asia may respond to refugee influxes into urban spaces. India is unwilling to allow Muslim refugees to become naturalized citizens, pointing to religious and cultural factors that produce insecurity in the South Asia region. Furthermore, tensions rise when apolitical agencies like the UNHCR call upon India’s conservative administration to protect a population they define as undesirable. By focusing on urban refugees and their interactions with the state and supranational organizations, this research demonstrates the importance of statehood and citizenship as instruments of sovereignty that uphold human rights and protect against insecurity.


2009 ◽  
Vol 9 (2) ◽  
pp. 6363-6395 ◽  
Author(s):  
M. Zavala ◽  
S. C. Herndon ◽  
E. C. Wood ◽  
T. B. Onasch ◽  
W. B. Knighton ◽  
...  

Abstract. Mobile emissions represent a significant fraction of the total anthropogenic emissions burden in the Mexico City Metropolitan Area (MCMA) and, therefore, it is crucial to use top-down techniques informed by on-road exhaust measurements to evaluate and improve traditional bottom-up official emissions inventory (EI) for the city. We present the measurements of on-road fleet-average emission factors obtained using the Aerodyne mobile laboratory in the MCMA in March 2006 as part of the MILAGRO/MCMA-2006 field campaign. A comparison of our on-road emission measurements with those obtained in 2003 using essentially the same measurement techniques and analysis methods indicates that, in the three year span, NO emission factors remain within the measured variability ranges whereas emission factors of aldehydes and aromatics species were reduced for all sampled driving conditions. We use a top-down fuel-based approach to evaluate the mobile emissions from the gasoline fleet estimated in the bottom-up official 2006 MCMA mobile sources. Within the range of measurement uncertainties, we found probable slight overpredictions of mean EI estimates on the order of 20–28% for CO and 14–20% for NO. However, we identify a probable EI underprediction of VOC mobile emissions between 1.4 and 1.9; although estimated benzene and toluene mobile emissions in the inventory seem to be well within the uncertainties of the corresponding emissions estimates. Aldehydes mobile emissions in the inventory, however, seem to be under predicted by factors of 3 for HCHO and 2 for CH3CHO. Our on-road measurement based estimate of annual emissions of organic mass from PM1 particles suggests a severe underprediction (larger than a factor of 4) of PM2.5 mobile emissions in the inventory. Analyses of ambient CO, NOx and CO/NOx concentration trends in the MCMA indicate that the early morning ambient CO/NOx ratio has decreased at a rate of about 1.9 ppm/ppm/year over the last two decades and that the decrease has been driven by reductions in CO levels rather than by NOx concentration changes, suggesting that the relative contribution of diesel vehicles to overall NOx levels has increased over time in the city. Despite the impressive increases in the size of the vehicle fleet between 2000 and 2006, the early morning ambient concentrations of CO and NOx have not increased accordingly, probably due to the reported low removal rates of older vehicles, which do not have emissions control technologies, and partially due to the much lower emissions from newer gasoline vehicles. This indicates that an emission-based air quality control strategy targeting large reductions of emissions from mobile sources should be directed towards a significant increase of the removal rate of older, highly-polluting, vehicles.


2013 ◽  
Vol 220 (2946) ◽  
pp. 50-51
Author(s):  
Tim Smedley
Keyword(s):  
Top Down ◽  

Multilingua ◽  
2018 ◽  
Vol 37 (6) ◽  
pp. 701-720 ◽  
Author(s):  
Saeed Rezaei ◽  
Maedeh Tadayyon

AbstractThis paper reports on the diversity of languages displayed in the linguistic landscape of Julfa district, a largely Armenian dominated area, in the city of Isfahan in Iran. The data included a corpus of 323 photographs taken from the top-down and bottom-up signage in this quarter of the city. Ethnographic fieldwork was also conducted to reach a deeper understanding of the linguistic landscape in Julfa. The results of the analyses indicated that Julfa, as home to Armenians in diaspora and also a luxurious neighborhood frequented by more modern strata of the Isfahani society, is occupied more noticeably with Persian and English language and to a lesser extent with Armenian language. The findings further revealed that this neighborhood represents not only Iranian but also Armenian and Christian identities. The results are analyzed based on Bourdieu’s theory of language as a symbolic power. Furthermore, the collective identity and language ecology of Julfa in Isfahan are discussed. At the end, some lines of research for further studies in the LL of Iran are provided.


2012 ◽  
Vol 21 (2) ◽  
pp. 68-88 ◽  
Author(s):  
Kornelia Ehrlich

This article analyses the phenomenon of urban regeneration and development in the context of globalisation and processes of Europeanisation with a focus on culture and creativity. It asks how the process of negotiating EU-rope is being reflected in places situated at the 'edge' of the European Union and which actors are involved in these processes of negotiating EU-rope, its culture, values and urban regeneration. The author presents an empirical example from Ljubljana, Slovenia. The focus lies on negotiating the usage and development of an abandoned industrial site. Here, different ideas of negotiating and developing the city in the context of globalisation and Europeanisation come to the fore: top-down approaches that follow the image of a creative city as well as bottom-up initiatives that develop anti-global and anti-capitalistic criticism with the help of social-spatial and cultural practices.


2019 ◽  
Vol 11 (20) ◽  
pp. 5714
Author(s):  
Yung-Jaan Lee

Taiwan suffers from many natural disasters and is vulnerable to climate change. A continuous increase in its ecological footprint (EF) would pose numerous threats to the city. Taipei is Taiwan’s most densely populated city. Whether its citizens are consuming more resources because of their high income and high degree of urbanization, thereby burdening the environment, warrants study. In contrast to most top-down EF analyses, in this study, 445 residents were surveyed to calculate their carbon, built-up land and water footprints. Gender, occupation, age, education level, personal annual income and socio-economic background do not influence water footprint or EF. Moreover, an individual’s water footprint is not correlated with his or her EF. The built-up land footprint that is obtained in this bottom-up study is similar to that in Taiwan’s top-down national footprint account. However, the personal carbon footprint found herein is smaller than that in the national footprint account, because this study asked respondents’ only about consumption related to everyday activities. Since Taipei residents have a high income and high daily consumption, the water footprint herein is larger than the top-down water footprint. This bottom-up EF analysis reflects residents’ daily consumption patterns and can be used in future urban decision-making.


Sign in / Sign up

Export Citation Format

Share Document