scholarly journals Research on Urban Public Green Space Planning Based on Taxi Data: A Case Study on Three Districts of Shenzhen, China

2019 ◽  
Vol 11 (4) ◽  
pp. 1132 ◽  
Author(s):  
Quanyi Zheng ◽  
Xiaolong Zhao ◽  
Mengxiao Jin
Keyword(s):  
Green Space ◽  
Spatial Interaction ◽  
Quadratic Function ◽  
Unsupervised Classification ◽  
Spatial Layout ◽  
Trajectory Data ◽  
Activity Intensity ◽  
Access Mode ◽  
The One ◽  
Public Green Space

Urban public green space (UPGS) plays an important role in sustainable development. In China, the planning, classification, and management of green spaces are based on the Standard for Classification of Urban Green Space (SCUGS). However, limitations to the UPGS exist due to the over-emphasis on quantitative standards and insufficient consideration of the actual access mode of residents. Though the taxi trajectory data are widely selected to study public service facilities, its adoption in UPGSs research remains limited. Based on the case of UPGSs in the three districts of Shenzhen, we used the taxi (including cruise taxis and Didi cars, which are like Uber) trajectory data to investigate the spatial layout and the allocation of management resource of the UPGSs from the spatial interaction perspective. By rasterizing and visualizing the percentage of pick-up and drop-off points in the UPGSs’ buffer, the service scope of UPGSs was defined, which reflected the spatial distribution and activity intensity of the visitors. Then, an unsupervised classification method was introduced to reclassify the twenty two municipal parks in the three districts. Compared to the traditional planning method, the results show that the service scope of the same type of UPGS in the traditional classification is not the same as the one obtained by the study. Visitors to all UPGSs are distributed as a quadratic function and decay as the distance increases. In addition, the attenuation rates of the same type of UPGSs are similar. The findings of this study are expected to assist planners in improving the spatial layout of UPGSs and optimizing the allocation of UPGS management resources based on new classifications.

scholarly journals Urban Gardening and Green Space Governance: Towards New Collaborative Planning Practices

2016 ◽  
Vol 1 (1) ◽  
pp. 5-19 ◽  
Author(s):  
Sofia Nikolaidou ◽  
Tanja Klöti ◽  
Simone Tappert ◽  
Matthias Drilling
Keyword(s):  
Urban Areas ◽  
Open Space ◽  
Green Space ◽  
Local Politics ◽  
Small Scale ◽  
Public And Private ◽  
Urban Forms ◽  
Urban Gardening ◽  
The One ◽  
Public Green Space

In the context of urban densification and central urban areas’ lack of open spaces, new forms of small-scale urban gardening practices have emerged. These gardening practices respond to urban pressures and open new modes of green space governance, presenting alternative and multifunctional ways to manage and revitalise cities. Focusing on the case of Geneva, the article unfolds two levels of discussion. On the one hand—and with reference to the theorist Habermas—it examines how multiple actors with different interests interplay and cooperate with each other in order to negotiate over open space, while discussing implications for local politics and planning. On the other hand, it describes how these negotiations result in new, innovative, and hybrid forms of public green space. The main findings indicate emerging forms of collaboration, partnerships, and governance patterns that involve public and private sectors and increase participation by civil society actors. Cooperation amongst several interested groups and the collective re-invention of public urban spaces increase these spaces’ accessibility for multiple users and actors, as well as present possibilities for alternative and diversified uses and activities. This might underline the hypothesis that future cities will be governed in less formalised ways, and that urban forms will be created through spontaneous, temporary, mobile, and adaptive negotiation processes.

scholarly journals Public Green Space Policy Implementation: A Case Study of Krakow, Poland

2021 ◽  
Vol 13 (2) ◽  
pp. 538
Author(s):  
Anita Kwartnik-Pruc ◽  
Anna Trembecka
Keyword(s):  
Legal Status ◽  
Green Space ◽  
Sustainable Urban Development ◽  
Original Research ◽  
Space Policy ◽  
The Public ◽  
Central Statistical ◽  
Central Statistical Office ◽  
Public Green Space

Green space is essential for the implementation of the idea of sustainable urban development. This paper contains original research on the implementation of local government tasks in the development of public green space. The aim of this research was to analyse the actions taken by the municipal authorities regarding the development of public green space, including the acquisition of real properties, the regulation of their legal status, as well as the adoption of planning and programme documents. The Polish Central Statistical Office data on the public green space of the largest cities in Poland were analysed in order to determine the dynamics of changes. Then, the focus was placed on Krakow, where the authors analysed in detail the distribution and type of urban green space as well as the actions taken by the Municipality to both extend it and to protect it against building development. The criterion of green space accessibility to city residents was indicated as a necessary aspect to be considered in the overall assessment of the existing greenery. The conclusions include the assessment of the actions of the Krakow authorities and the observed trends in the development of public green space.

Comparative study on e-bikes’ decision-making behaviors under flashing green and green countdown

2021 ◽  
pp. 1-8
Author(s):  
Haoyang Meng ◽  
Sheng Dong ◽  
Jibiao Zhou ◽  
Shuichao Zhang ◽  
Zhenjiang Li
Keyword(s):  
Decision Making ◽  
Critical Issue ◽  
Trajectory Data ◽  
Decision Points ◽  
Binary Logit ◽  
The One ◽  
Common Signal ◽  
And Function ◽  
Decision Behaviors ◽  
Stop Line

Green flash light (FG) and green countdown (GC) are the two most common signal formats applied in green-red transition that provides drivers additional alert before termination of green phase. Due to their importance and function in stop-pass decision-making process, proper use of them has become a critical issue to greatly improve the safety and efficiency of signalized intersections. Gradually e-bike riders have become more important commuters in China, however, the influence of FG or GC on them is not clear yet and need pay more attention to it. This study chooses two almost identical intersections to obtain highly accurate trajectory data of e-bike riders to study their decision-making behaviors under FG or GC. The e-bike riders’ behavior is classified into four categories and is to identify their stop-pass decision points using the acceleration trend. Two binary-logit models were built to predict the stop–pass decision behaviors for the different e-bike rider groups, explaining that the potential time to the stop-line is the dominant independent factor of the different behaviors of GC and FG. Furthermore empirical analysis of decision points indicated that GC provides the earlier stop-pass decision point and longer decision making duration on the one side while results in more complexity of decision making and greater risk of stop-line crossing than FG on the other side.

scholarly journals Socioeconomic Differences in Walking Time of Children and Adolescents to Public Green Spaces in Urban Areas—Results of the German Environmental Survey (2014–2017)

2021 ◽  
Vol 18 (5) ◽  
pp. 2326
Author(s):  
Julia Rehling ◽  
Christiane Bunge ◽  
Julia Waldhauer ◽  
André Conrad
Keyword(s):  
Young People ◽  
Children And Adolescents ◽  
Urban Areas ◽  
Green Space ◽  
Positive Impact ◽  
Green Spaces ◽  
Environmental Survey ◽  
Urban Green Spaces ◽  
Public Green Space ◽  
Walking Time

Public green spaces have a high potential for a positive impact on people’s health and wellbeing, especially in urban areas. Studies on environmental justice indicate socially unequal access possibilities to urban green spaces. This article presents results on associations between individual socioeconomic position (SEP) and walking time from home to public green spaces in young people living in urban areas with more than 20,000 inhabitants in Germany. Data were derived from the German Environmental Survey for Children and Adolescents 2014–2017 (GerES V), the environmental module of the German Health Interview and Examination Survey for Children and Adolescents (KiGGS Wave 2). The sample comprises 1149 participants aged 3 to 17 years. A total of 51.5% of the participants reach a public green space on foot within five and 72.8% within ten minutes from home. The lower the participant’s SEP, the longer the walking time. Logistic regression models controlling for age group, sex, migration background, and region of residence show that participants with a low SEP have a significantly higher risk (odds ratio = 1.98; 95% confidence interval: 1.31–2.99) of needing more than ten minutes to walk from home to a public green space than participants with a high SEP. GerES V data indicate that young people living in urban areas in Germany do not equally benefit from the health-promoting potential of green spaces, which is an important aspect of environmental health inequalities.

Unknown input fractional-order functional observer design for one-side Lipschitz time-delay fractional-order systems

2019 ◽  
Vol 41 (15) ◽  
pp. 4311-4321 ◽  
Author(s):  
Mai Viet Thuan ◽  
Dinh Cong Huong ◽  
Nguyen Huu Sau ◽  
Quan Thai Ha
Keyword(s):  
Time Delay ◽  
Nonlinear Systems ◽  
Fractional Order ◽  
Sufficient Conditions ◽  
Quadratic Function ◽  
Observer Design ◽  
Linear Matrix ◽  
Unknown Input ◽  
Functional Observer ◽  
The One

This paper addresses the problem of unknown input fractional-order functional state observer design for a class of fractional-order time-delay nonlinear systems. The nonlinearities consist of two parts where one part is assumed to satisfy both the one-sided Lipschitz condition and the quadratically inner-bounded condition and the other is not necessary to be Lipschitz and can be regarded as an unknown input, making the wider class of considered nonlinear systems. By taking the advantages of recent results on Caputo fractional derivative of a quadratic function, we derive new sufficient conditions with the form of linear matrix inequalities (LMIs) to guarantee the asymptotic stability of the systems. Four examples are also provided to show the effectiveness and applicability of the proposed method.

scholarly journals TINGKAT KESESUAIAN RUANG PUBLIK DENGAN KONSEP LIVABLE CITY DI KOTA SURAKARTA

Arsitektura ◽  
2017 ◽  
Vol 15 (1) ◽  
pp. 165
Author(s):  
Ifni Farida ◽  
Galing Yudana ◽  
Erma Fitria Rini
Keyword(s):  
Public Space ◽  
Green Space ◽  
National Average ◽  
Research Approach ◽  
The Public ◽  
Analysis Technique ◽  
Medium Level ◽  
The City ◽  
Public Green Space ◽  
Deductive Research

<div align="center"><table border="1" cellspacing="0" cellpadding="0"><tbody><tr><td valign="top" width="518"><p><strong><em>Abstract:</em></strong><em> Development of the urban population in Indonesia that growing rapidly these days, of course will cause impacts for the city itself, including in terms of environmental degradation. Therefore, society needs of a comfortable and livable city is getting higher, which is known as the concept of livable city. One of the key principles of the concept of livable city is the availability of public space as a place to socialize and interact. Surakarta, within 5 (five) years, being actively promote provision of public green space, as one of the public space, as evidenced by the increase of public green space area 23,16% in 2016. In a study titled Indonesia Most Livable City Index, Surakarta has a livable city index reached 69,38% above the national average. The problem in this research is how the level of conformity of the public space in Surakarta with the concept of livable city? This study aims to determine the level of conformity of the public space in Surakarta with the concept of livable city, which covers several aspects, including: availability, coverage, accessibility, comfort, amenity, and supporting activity. The method in this study using deductive research approach and scoring analysis technique. Based on the analysis, it can be seen that the level of conformity of the public space in Surakarta with the concept of livable city included into the category of medium-level conformity. Nonetheless, it needs improvement in some aspects of public space in Surakarta whose value is still low, in order to realize the public space in Surakarta according to the concept of livable city.</em></p></td></tr><tr><td valign="top" width="518"><p><strong><em> </em></strong></p></td></tr><tr><td valign="top" width="518"><p><strong><em>Keywords: </em></strong><em>level of conformity, public space, livable city, scoring analysis</em></p></td></tr></tbody></table></div>

scholarly journals Accessibility and attractiveness of primary care services in Algeria: Models of spatial interaction of the NHPF of the Eastern Health Region

2017 ◽  
Vol 1 (2) ◽  
pp. 24-34
Author(s):  
Nasreddine AISSAOUI ◽  
Said BRIKA
Keyword(s):  
Spatial Interaction ◽  
Eastern Health ◽  
Negative Effects ◽  
Positive Effects ◽  
Care Services ◽  
Primary Care Services ◽  
Eastern Algeria ◽  
The One ◽  
Financial Allocation

The restructuring of basic health care structures represented by public institutions nearby care in Algeria, according to Executive Decree 07/140 of 19 May 2007, could have effects both positive and negative: positive effects as we quote the approximation of diversified health services towards the citizen. As for the negative effects they live in ignorance of the real role of this kind of structure, namely the prevention in the broad sense of the term before the one of care. Among the results of our case study on the 7 wilayas of eastern Algeria, we noted: a small financial allocation and a shortage of medical and paramedical human resources, which have frozen the role of these NHPF, and which have favored the caregiver’s recourse to hospital emergencies. On the other hand, we have also noticed the sufficient number of these structures throughout all the communes of the country and their proximity to the living environments, despite the derisory number of services rendered, which were able to meet certain needs of the inhabitants.

scholarly journals Real-Time Return Demand Prediction Based on Multisource Data of One-Way Carsharing Systems

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Dongbo Liu ◽  
Jian Lu ◽  
Wanjing Ma
Keyword(s):  
Prediction Model ◽  
Real Time ◽  
Supply And Demand ◽  
Optimization Strategy ◽  
Trajectory Data ◽  
Demand Prediction ◽  
Data User ◽  
User Characteristic ◽  
Destination Station ◽  
The One

One-way carsharing system has been widely adopted in the carsharing field due to its flexible services. However, as one of the main limitations of the one-way carsharing system, the imbalance between supply and demand needs to be solved. Predicting pick-up demand has been studied to achieve the goal, but using returned vehicles to reduce unnecessary relocation is also one of the important methods. Nowadays, trajectory data and other data are available for real-time prediction for return demand. Based on the return demand prediction, the relocation response can be more reasonable. Thus, the balance of demand and supply can be largely improved. The multisource data include trajectory data, user application log data, order data, station data, and user characteristic data. Based on these data, a return demand prediction model was used to predict whether the user will return the vehicle in 15 min in real time, and a destination station prediction model was applied to forecast which station the user will park at. Finally, a case study using ten stations’ one-week field data was conducted to test the benefit of the dynamic return demand prediction. The results showed that the return demand prediction improves the efficiency of the relocations by mitigating the condition that the station parking space is full or empty. The potential application of this study would effectively reduce unnecessary relocation and further formulate an active operation optimization strategy to reduce the system’s operational cost and improve the service quality of the system.

Sign in / Sign up

Export Citation Format

Share Document