scholarly journals Cluster Analysis of Public Bike Sharing Systems for Categorization

2020 ◽  
Vol 12 (14) ◽  
pp. 5501
Author(s):  
Tamás Mátrai ◽  
János Tóth

The world population will reach 9.8 billion by 2050, with increased urbanization. Cycling is one of the fastest developing sustainable transport solutions. With the spread of public bike sharing (PBS) systems, it is very important to understand the differences between systems. This article focuses on the clustering of different bike sharing systems around the world. The lack of a comprehensive database about PBS systems in the world does not allow comparing or evaluating them. Therefore, the first step was to gather data about existing systems. The existing systems could be categorized by grouping criterions, and then typical models can be defined. Our assumption was that 90% of the systems could be classified into four clusters. We used clustering techniques and statistical analysis to create these clusters. However, our estimation proved to be too optimistic, therefore, we only used four distinct clusters (public, private, mixed, other) and the results were acceptable. The analysis of the different clusters and the identification of their common features is the next step of this line of research; however, some general characteristics of the proposed clusters are described. The result is a general method that could identify the type of a PBS system.

2000 ◽  
Vol 37 (5) ◽  
pp. 1000-1024 ◽  
Author(s):  
Mark Foster ◽  
Robin Fell ◽  
Matt Spannagle

The paper describes the results of a statistical analysis of failures and accidents of embankment dams, specifically concentrating on those incidents involving piping and slope instability. The compilation of dam incidents includes details on the characteristics of the dams, including dam zoning, filters, core soil types, compaction, foundation cutoff, and foundation geology. An assessment of the characteristics of the world population of dams was also carried out. By comparing the characteristics of the dams which have experienced failures and accidents to those of the population of dams, it was possible to assess the relative influence of particular factors on the likelihood of piping and slope instability.Key words: dams, failures, piping, instability database.


2013 ◽  
Vol 4 (1) ◽  
pp. 83-96
Author(s):  
Vinnie Jauhari

As the world gets increasingly urbanised, there will be a consequence for energy generation, consumption and distribution. As the world population increases, there will be an increased demand for services- healthcare, transport, housing, infrastructure, information technology among others. The growing economies like India would have even greater challenges. The choice of forms of urbanization should needs to be assessed. What kind of cities would be sustainable is a question that needs more exploration? Walkability, compact housing, sustainable transport, alternate forms of energy generation are all aspects which need to be looked into. The paper focuses on what forms of urbanisation should India look at and how energy choices should be built in the planning process.


As per world economic forum and UN's world population prospects, every year, the world's population is getting increased by 83 million more people, with this increasing population the usage of some of the available abundant natural resource has increased which may lead to scarcity of these resources. The world was using a traditional economic model based on a 'take-make-consume-throw away' approach of resources, it relays on cheap and easily available resources and starts producing goods, uses it and finally destroys it or dump it as a huge waste. So the world has to shift the gear to circular and sharing economy models. On a small scale, many companies are already working on the problems of resource usage efficiency by developing new technologies, such as those underlying the so-called sharing economy. Car sharing, and bike sharing for example. The circular economy is the process of not buying the goods but using the services and performance of the goods than owning it. This is the model where the manufacturers or the retailers are the owners of the goods and products used by us. The maintenance and repairs will be handled by the manufacturer which is also a part of the deal. In the recent years, the circular economy has gained a greater momentum in all parts of the world like corporate, governments, non-profit organizations and industry associations. The Circular economy will act as an innovative national level developmental strategy with a long-term vision for the future of a well-sustained world by increasing the abundance of the available natural resources. Yet the circular economy has a setback in its model; it also needs certain resource and energy for the process of recycling which is comparatively less. The major question will be whether the energy required for recycling is always lower than reproducing the product itself


Author(s):  
Emilie M. Hafner-Burton

In the last six decades, one of the most striking developments in international law is the emergence of a massive body of legal norms and procedures aimed at protecting human rights. In many countries, though, there is little relationship between international law and the actual protection of human rights on the ground. This book takes a fresh look at why it's been so hard for international law to have much impact in parts of the world where human rights are most at risk. The book argues that more progress is possible if human rights promoters work strategically with the group of states that have dedicated resources to human rights protection. These human rights “stewards” can focus their resources on places where the tangible benefits to human rights are greatest. Success will require setting priorities as well as engaging local stakeholders such as nongovernmental organizations and national human rights institutions. To date, promoters of international human rights law have relied too heavily on setting universal goals and procedures and not enough on assessing what actually works and setting priorities. This book illustrates how, with a different strategy, human rights stewards can make international law more effective and also safeguard human rights for more of the world population.


2018 ◽  
Vol 16 (1) ◽  
pp. 112-119
Author(s):  
VLADIMIR GLEB NAYDONOV

The article considers the students’ tolerance as a spectrum of personal manifestations of respect, acceptance and correct understanding of the rich diversity of cultures of the world, values of others’ personality. The purpose of the study is to investgate education and the formation of tolerance among the students. We have compiled a training program to improve the level of tolerance for interethnic differences. Based on the statistical analysis of the data obtained, the most important values that are significant for different levels of tolerance were identified.


2020 ◽  
Vol 11 (SPL1) ◽  
pp. 550-557
Author(s):  
Harini P ◽  
Abilasha R

The most unexpected pandemic global outbreak is COVID 19 which is a newly discovered viral infection which originated in Wuhan, China and it caused the outbreak of pneumonia in the rest of the world. Dental practitioners are more susceptible to COVID 19 infection as their work is related to the aerosol formation during various procedures through which the virus spreads. The aim of the study is to create awareness about precautionary measures against COVID- 19 exposure among dental practitioners in Tamilnadu. A Survey based questionnaire was formulated with questions related to the various precautionary measures to be adopted by dental practitioners which would be effective to prevent Covid-19 exposure. A questionnaire with a total of 20 questions was circulated among dental practitioners and the responses were collected by google forms SPSS software statistical analysis was done. The overall awareness of dental practitioners against Covid-19 was above average. The dental practitioners were relatively well aware of the precautions to be adopted while treating the patients, but the implementation in practice is lacking due absence of hands-on experience in using various kinds of PPE. There is a gap between knowledge and attitude and practice among the participants of this survey. It is therefore essential to plan for organising training sessions and hands-on workshops for the use of PPE and public training of the general population regarding Covid-19 to improve the knowledge among the patients visiting the dental clinic as well.


2014 ◽  
Vol 6 (01) ◽  
Author(s):  
JAVED ALAM SHEIKH

Almost 50 per cent of the world population is constituted by the women and they have been making substantial contribution to socio-economic development. But, unfortunately their tremendous contribution remains unrecognized and unnoticed in most of the developing and least developed countries causing the problem of poverty among them. Empowering women has become the key element in the development of an economy. With women moving forward, the family moves, the village moves and the nation moves. Hence, improving the status of women by way of their economic empowerment is highly called for. Entrepreneurship is a key tool for the economic empowerment of women around the world for alleviating poverty. Entrepreneurship is now widely recognized as a tool of economic development in India also. In this paper I have tried to discuss the reasons and role of Women Entrepreneurship with the help of Push and Pull factors. In the last I have also discussed the problems and the road map of Women Entrepreneurs development in India.


2020 ◽  
Author(s):  
Serena Stefani ◽  
Gabriele Prati

Research on the relationship between fertility and gender ideology revealed inconsistent results. In the present study, we argue that inconsistencies may be due to the fact that such relationship may be nonlinear. We hypothesize a U- shaped relationship between two dimensions of gender ideology (i.e. primacy of breadwinner role and acceptance of male privilege) and fertility rates. We conducted a cross-national analysis of 60 countries using data from the World Values Survey as well as the World Population Prospects 2019. Controlling for gross domestic product, we found support for a U-shaped relationship between gender ideology and fertility. Higher levels of fertility rates were found at lower and especially higher levels of traditional gender ideology, while a medium level of gender ideology was associated with the lowest fertility rate. This curvilinear relationship is in agreement with the phase of the gender revolution in which the country is located. Traditional beliefs are linked to a complementary division of private versus public sphere between sexes, while egalitarian attitudes are associated with a more equitable division. Both conditions strengthen fertility. Instead, as in the transition phase, intermediate levels of gender ideology’s support are associated with an overload and a difficult reconciliation of the roles that women have to embody (i.e. working and nurturing) so reducing fertility. The present study has contributed to the literature by addressing the inconsistencies of prior research by demonstrating that the relationship between gender ideology and fertility rates is curvilinear rather than linear.


1973 ◽  
Author(s):  
Robert R. Read ◽  
Richard S. Elster ◽  
Gerald L. Musgrave ◽  
John W. Creighton ◽  
William H. Githens

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