Homegarden plant diversity in relation to remoteness from urban centers: A case study from the Peruvian Amazon region

Author(s):  
A. Wezel ◽  
J. Ohl
2021 ◽  
Vol 10 (4) ◽  
pp. 230
Author(s):  
Onel Pérez-Fernández ◽  
Juan Carlos García-Palomares

Moped-style scooters are one of the most popular systems of micro-mobility. They are undoubtedly good for the city, as they promote forms of environmentally-friendly mobility, in which flexibility helps prevent traffic build-up in the urban centers where they operate. However, their increasing numbers are also generating conflicts as a result of the bad behavior of users, their unwarranted use in public spaces, and above all their parking. This paper proposes a methodology for finding parking spaces for shared motorcycle services using Geographic information system (GIS) location-allocation models and Global Positioning System (GPS) data. We used the center of Madrid and data from the company Muving (one of the city’s main operators) for our case study. As well as finding the location of parking spaces for motorbikes, our analysis examines how the varying distribution of demand over the course of the day affects the demand allocated to parking spaces. The results demonstrate how reserving a relatively small number of parking spaces for scooters makes it possible to capture over 70% of journeys in the catchment area. The daily variations in the distribution of demand slightly reduce the efficiency of the network of parking spaces in the morning and increase it at night, when demand is strongly focused on the most central areas.


Processes ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 1313
Author(s):  
Antonia Arroyo ◽  
Fabián Provoste ◽  
Montserrat Rodríguez ◽  
Ana L. Prieto

Polycyclic aromatic hydrocarbons (PAHs) are a family of organic compounds of widespread presence in the environment. They are recalcitrant, ubiquitous, prone to bioaccumulation, and potentially carcinogenic. Effluent from wastewater treatment plants (WWTPs) constitutes a major source of PAHs into water bodies, and their presence should be closely monitored, especially considering the increasing applications of potable and non-potable reuse of treated wastewater worldwide. Modeling the fate and distribution of PAHs in WWTPs is a valuable tool to overcome the complexity and cost of monitoring and quantifying PAHs. A mechanistic model was built to evaluate the fate of PAHs in both water and sludge lines of a Chilean WWTP. Naphthalene and benzo(a)pyrene were used as models of low-MW and high-MW PAHs. As there were no reported experimental data available for the case study, the influent load was determined through a statistical approach based on reported values worldwide. For both naphthalene and benzo(a)pyrene, the predominant mechanism in the water line was sorption to sludge, while that in the sludge line was desorption. Compared to other studies in the literature, the model satisfactorily describes the mechanisms involved in the fate and distribution of PAHs in a conventional activated sludge WWTP. Even though there is evidence of the presence of PAHs in urban centers in Chile, local regulatory standards do not consider PAHs in the disposal of WWTP effluents. Monitoring of PAHs in both treated effluents and biosolids is imperative, especially when considering de facto reuse and soil amendment in agricultural activities are currently practiced downstream of the studied WWTP.


2014 ◽  
Vol 2 (1) ◽  
pp. 133-157
Author(s):  
Yasmin Mohd Fauzi ◽  
Juliza Mohamad

AbstrakKelantan terletak dalam pengasingan dari koridor perindustrian di pantai barat dan jauh dari pengaruh KualaLumpur, Pulau Pinang dan Singapura. Adalah penting untuk menentukan daya-daya penentu pertumbuhanbandar di negeri ini kerana pusat-pusat bandar di Kelantan mempunyai gabungan unik antara potensidan kekangan. Walau bagaimanapun, sebagaimana proses globalisasi dan urbanisasi perbandaranyang berlaku di seluruh dunia, evolusi senibina di Kelantan tidak terkecuali dan pemeliharaan nilai-nilaisejarah yang unik perlu dilakukan. Warisan senibina Kelantan hari ini kurang dihargai oleh masyarakatkerana karaktornya yang terpencil dan kurang baik. Hal ini kerana proses pengekalan bangunan warisankurang diberi perhatian dan juga kurang mendapat penekanan daripada pihak berkuasa dan masyarakatsendiri. Terdapat banyak bangunan-bangunan bersejarah di Kota Bharu yang telah dirobohkan untuktujuan pembangunan bandar dan ada sebahagian bangunan diberi pengaruh gaya seni bina modendan kontemporari tanpa mengambil kira nilai sejarah yang sedia ada. Pertumbuhan intervensi senibinaadalah tidak dapat dielakkan atas permintaan untuk memenuhi keperluan perbandaran. Akibatnya, corakpersekitaran bandar dan warisan senibina ini mengalami perubahan sepanjang proses pembandaran.Selain itu, perubahan telah memberi kesan kepada suasana persekitaran iaitu bangunan (warisan alambina), serta perancangan jalan dan aktiviti. Abstract Kelantan is situated somewhat in isolation from the industrial corridor of the west coast and far from thesphere of influence of Kuala Lumpur, Penang and Singapore. It is important to determine the forces of thestate’s urban growth determinants because urban centers in Kelantan have their unique mix of potentialsand constraints. However, as far as globalization and urbanization that are taking place worldwide, thearchitectural evolution in Kelantan is not exempted and the preservation of any unique historical valueshould be done. The heritage architecture value of Kelantan today, has not been appreciated by localfolks and society because of its isolated and poor characters which has not been maintained and wellemphasized by the authority and society themselves. Hence, the remarkable heritage property has been‘invisible’ and demolished due to negligence and time factors. Moreover, there are many historical buildingsin Kota Bharu that had been demolished for urban development purposes and the influence of modernand contemporary architecture style without considering the existing and distinctive of historical value.The growth of architectural intervention is inevitably due to society and its demands to fulfill their urbanneeds nowadays. As a result, the pattern of urban setting and heritage property had changed throughoutthe years of urbanization. Moreover, the changes have affected the ambiance of surrounding i.e. buildings(built-heritage), and streets planning and activities.


2013 ◽  
Vol 38 (4) ◽  
pp. 58-69
Author(s):  
Yasser Elsheshtawy

This paper in its first part aims at contextualizing Abu Dhabi's urban development and understanding the factors that have governed its urban growth through a historical case study approach. Relying on archival records and primary sources five stages of urban growth are identified. Data mining of media archives allows for a first hand account of developments taking place thus grounding the depictions. The second part contextualizes this review through a case study of the Central Market project — also known as Abu Dhabi's World Trade Center. The paper concludes by elaborating on the significance of such a historical analysis as it shifts the discourse away from a focus on the ‘artificiality’ of cities in the Gulf to one that is based on a recognition about the historicity of its urban centers, however recent it may be. Additionally the pertinence of such an analysis for cities worldwide is discussed as well.


2015 ◽  
Vol 32 (4) ◽  
pp. 144-152
Author(s):  
Saulat Pervez

With so much focus on illiteracy, we sometimes forget the dire stateof affairs in our urban centers with regard to education. Educationin the Muslim world has increasingly regressed into an exercise ofrote learning, a mass of discrete knowledge, and a frenzied race towardwhat we deem “useful” skills. By showing the ground realityin private education in Karachi, Pakistan, this article strives to highlightthe cyclical and future-oriented trends in schools that are inimicalto the very spirit of education. In doing so, it emphasizes theneed to adopt thinking as the primary skill taught to students inschools, with everything else encompassed within its fold. WhileKarachi is a case study here, the importance of creating thinkingcultures within schools is a crucial and very relevant concept toschools everywhere in the world, including the United States.


2021 ◽  
Vol 18 (3) ◽  
pp. 281-295
Author(s):  
Vishwambhar Prasad Sati

This study examines the types, reasons, and consequences of out-migration in the Uttarakhand Himalaya. Data were collected from secondary sources, mainly from an interim report on the status of migration in revenue villages of Uttarakhand, published by the ‘Rural Development and Migration Commission, Pauri Garhwal, Uttarakhand’ in 2018. The district-wise analysis was carried out on the types of migration, reasons for migration, age-wise migration, the destination of migrants, and migration’s consequences in terms of depopulation in rural areas. Further, a case study of a village was carried out. The study reveals that in three districts – Pauri, Tehri, and Almora, more than 10% population out-migrated after 2011. Similarly, an exodus migration took place from more than 10% of villages of the same districts. This study further shows that migration is mainly internal – from the mountainous districts to urban centers, within the districts or within the state. About 734 villages are depopulated, and in 367 villages, the population has decreased by more than 50%. Unemployment is the major problem in rural areas as more than 50% of out-migration occurred for employment. 


Author(s):  
James F. Osborne

This chapter proposes a model for how the Syro-Anatolian Culture Complex (SACC) arose during the Late Bronze–Iron Age transition at the end of the second millennium and start of the first millennium BCE. It presents SACC as a case study for diaspora studies in the tradition of Paul Gilroy and James Clifford. A series of demographic transformations took place at this time, including small-scale migrations from central Anatolia and the Aegean into southeastern Anatolia, as well as a ruralization of the local settlement patterns from previous major urban centers. Together, these transformations brought several different populations into close contact with one another, resulting in a diverse ethnolinguistic landscape reminiscent of certain contemporary situations of diaspora. It is precisely these mixed cultural origins that have led SACC to be so difficult for scholars to characterize, leading as it did to multiple affiliation groups sharing cultural and political traditions.


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