Design and Experimental Study of a Cascade Thermoacoustic Engine for Remote and Rural Communities

2017 ◽  
Vol 139 (3) ◽  
Author(s):  
Isares Dhuchakallaya ◽  
Patcharin Saechan
Keyword(s):  
Rural Communities ◽  
Rural Areas ◽  
Traveling Wave ◽  
Low Frequency ◽  
Acoustic Power ◽  
Point Of View ◽  
Working Fluid ◽  
Thermoacoustic Engine ◽  
The People ◽  
In Series

The design, construction, and experimental evaluation of a cascade thermoacoustic engine are presented in this paper. The system was designed and built under the constraint of an inexpensive device to meet the energy needs of the people based in remote and rural areas. From the cost and straightforward system point of view, the air at atmospheric pressure was applied as a working fluid, and the main resonator tubes were then constructed of conventional polyvinyl chloride (PVC) pipes. Such device consists of one standing-wave unit and one traveling-wave unit connected in series. This topology is preferred because the traveling-wave unit provides an efficient energy conversion, and a straight-line series configuration is easy to build and allows no Gedeon streaming. The system was designed to operate at a low frequency of about 57 Hz. The measured results were in a reasonably good agreement with the predicted results. So far, this system can deliver up to 61 W of acoustic power, which was about 17% of the Carnot efficiency. In the further step, the proposed device will be applied as the prime mover for driving the thermoacoustic refrigerator.

Cities and Countryside: An International Law Perspective

2021 ◽  
Vol 30 (1) ◽  
pp. 155-165
Author(s):  
Francesco Francioni
Keyword(s):  
Rural Communities ◽  
International Law ◽  
Urban Communities ◽  
Rural Areas ◽  
Dominant Role ◽  
Historical Narrative ◽  
Balanced Approach ◽  
The People ◽  
The World ◽  
Economic Interaction

Cities, as spaces of socio-cultural organization and economic interaction among people, have always played a dominant role in the development and implementation of international law. Today, a new strand of legal scholarship focuses on cities and local communities as competitors and partners with the nation State in a new project of modernization and democratization of international law. This paper looks at this new trend against the background of the historical narrative of cities in the development of international law. At the same time, it calls attention to the fact that half of humanity still lives and works in rural areas, in the vast countryside of the world. Rural communities have been the servants of the city since the beginning of time. Today, their dignity and rights are beginning to be recognized by acts of the United Nations such as the 2007 Declaration of the Rights of Indigenous Peoples and the 2018 Declaration on the Rights of Peasants. Yet, these people remain a disadvantaged and vulnerable class. A true modernization and democratization of international law requires that we keep a balanced approach to the legal recognition of the voices and rights of urban communities and those of the people who work and live in the countryside of the world.

Requirements Engineering in the ICT4D Domain

2012 ◽  
pp. 187-200
Author(s):  
Kristina Pitula ◽  
Daniel Sinnig ◽  
Thiruvengadam Radhakrishnan
Keyword(s):  
Rural Communities ◽  
Software Development ◽  
Requirements Engineering ◽  
Information And Communication Technologies ◽  
Rural Areas ◽  
Local Population ◽  
Communication Technologies ◽  
Social Contexts ◽  
The People ◽  
Information And Communication

Requirements engineering is an important stage in any software development. It is more so in the case of software development for social development projects in rural areas of the developing countries. ICT4D which stands for “Information and Communication Technologies for Development” is gaining more and more attention as computing is more widely affordable. This article is concerned with requirements engineering in the ICT4D domain. In many developing counties, a significant effort is being put into providing people in rural areas with access to digital content and services by using Information and Communication Technologies. Unfortunately most ICT4D projects pursue a top-down development model which is driven by the technology available and not by the very needs and social problems of the people living in rural communities (Frohlich et al., 2009). Existing technologies are often applied in a non-inclusive manner with respect to the local population, without sufficient adaptation or re-invention, and often without regard for user’s needs and their social contexts.

scholarly journals The lawn grew too quickly! Perception of rural idyll by Czech amenity migrants

GeoScape ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 55-67 ◽  
Author(s):  
Jan Píša
Keyword(s):  
Rural Communities ◽  
Rural Areas ◽  
Point Of View ◽  
Social Dimension ◽  
Way Of Life ◽  
Structured Interviews ◽  
Initial Image ◽  
Rural Space ◽  
Initial Perception

Abstract The arrival of amenity migrants has significant impacts for many rural areas in economic, environmental and social terms. While the causes of relocation from cities to remote rural localities can be generally understood as attempts to change the way of life, the consequences of this phenomenon are relatively diverse. Perception of rural space from the migrant´s point of view stems partly from the so-called rural idyll, which shapes the image of the countryside across society, especially through media, tourism and recreation. This study aims to discover links between rural idyll and motivational factors of the Czech amenity migrants. Semi-structured interviews with the Czech amenity migrants have been used in order to uncover the social dimension of the phenomenon of rural idyll. Emphasis has been put both on the genesis of their relationship to the rural environment, but also on the consistency and differences between expectations and the reality of rural life. I identify the key role of tourism and recreation in shaping the initial perception of rural space, whereas the role of media is rather implicit. In the perception of amenity migrants, the initial image of rural space differed only slightly when the physical environment of rural space is considered but a mismatch is found between initial ideas about rural communities and their real experience after moving there.

scholarly journals Identity in the conditions of the united communities

2019 ◽  
Vol 22 (2) ◽  
pp. 5-15
Author(s):  
Liana Zelenkevich
Keyword(s):  
Rural Communities ◽  
Local Government ◽  
Identity Development ◽  
Rural Areas ◽  
Interpersonal Relations ◽  
Point Of View ◽  
The Future ◽  
Model Of Management ◽  
Decentralization Reform ◽  
New Community

Based on the theoretical basis and empirical data, the article discusses from the sociological point of view the problem of identity development within the framework of the reform of local government, namely within the process of creating the united territorial communities.Understanding identity as a person’s property to feel belonging to a group, the author focuses on the issues of its change in rural communities that have joined the process of reforming local self-government.Based on the analysis of information on the first elections in the united communities of Zaporizhzhia and Lviv regions, a general social portrait of the current head of the united territorial community was developed.The author analyzes the recent results of community association and expressed the opinion that the structural process of construction of territorial units is characterized in general by the same regional trends, caused by more or less equivalent community consciousness of the entire rural population of the country.At the same time, there are differences in the results of the restructuring of power in different parts of the country, namely the spread of tendencies of ignorance and the opposition to decentralization in the West and the success of the restructuring of local authorities in the East of Ukraine.This is due, according to the author, to a greater degree of traditionalist identity in the western regions and an increase in the modern identity component in the eastern regions.Attention is drawn to the fact that decentralization, which is accompanied by the transformation of the boundaries of the rural community, raises problems of identity change.There is a problem of forming the perception of the new community of the united community as an ident for the rural man.It is revealed that decentralization in Ukraine, in particular the creation of united territorial communities, will have as a result of the destruction of the traditionalist identity of a person living in rural areas, the erosion of the communal content of interpersonal relations through the weakening of communal ties, which, in turn, the question of the future effectiveness of the system of local self-government, the mechanism of which is being built, since the essence of such a model of management is the collective solution of problems of local importance on the basis of a single identity .In this context, the author proposes to distinguish between the traditional community and the modernized community.The study focuses on the specific features of a modernized community, which, on the one hand, relate it in some respects to the urban community, and on the other hand, characterize it as a hybrid of the community and the urban community.At the same time, members of the united community will in the future form a new identity that is not inherited, but constructed on the basis of formal principles, rather than cultural attributes.The researcher concludes that it is problematic to achieve the goal of decentralization reform, which was declared by the authorities, to create a capable local government that will address all local issues and bear responsibility for it, because the community of unions as a means of transformation does not take into account the complexities of identity.

A TRAVELING WAVE THERMOACOUSTIC ENGINE - DESIGN AND TEST

2021 ◽  
pp. 1-9
Author(s):  
Mitchell McGaughy ◽  
Chengshi Wang ◽  
Eric Boessneck ◽  
Thomas Salem ◽  
John R Wagner
Keyword(s):  
Acoustic Wave ◽  
Traveling Wave ◽  
System Analysis ◽  
Waste Heat ◽  
Electrical Power ◽  
Performance Testing ◽  
Cost Effective ◽  
Acoustic Power ◽  
Consumer Products ◽  
Thermoacoustic Engine

Abstract The demand for clean, sustainable, and cost-effective energy continues to increase due to global population growth and corresponding use of consumer products. The provision of heat to a thermoacoustic prime mover results in the generation of an acoustic wave that can be converted into electrical power. Thermoacoustic devices offer highly reliable and transportable power generation with low environmental impact using a variety of fuel sources. This paper focuses on the design and testing of a single stage, traveling wave, thermoacoustic engine. The system configuration, component design, and integration of sensors will be described. Performance testing and system analysis shows that for a 300 W heat source, the thermoacoustic machine generates a 54 Hz acoustic wave with a thermal efficiency of 7.8%. The system's acoustic power output may be increased by 84% through improved heat exchanger design. Tuning of the acoustic system and optimization of the bi-directional turbine merit attention to realize an applicable waste heat energy harvesting system.

scholarly journals Topeng Ireng Sebagai Wujud Rasa Syukur di Kabupaten Magelang pada Era Globalisasi

2019 ◽  
Author(s):  
hana haqiqi
Keyword(s):  
Rural Communities ◽  
Cultural Heritage ◽  
Rural Areas ◽  
Research Method ◽  
Cultural Assets ◽  
The People ◽  
History Of

Topeng ireng is a typical art from Magelang that was originally used as a means for spreading the islamic teachings. But, as time goes by, Topeng Ireng used as a form of gratitude for the people after making a celebration such as wedding, circumcision, or another celebration. Topeng Ireng commonly found in rural areas because rural communities still preserving the cultural heritage of their ancestors. In this era of globalization, Topeng Ireng art which had been abandoned began to appear again that looks more modern without leaving its characteristics, that is by adding campursari or dangdut music. The research method is descriptive in which this research explains in more detail about Topeng Ireng. The results of the study explain the history of Topeng Ireng as well as what is the Topeng Ireng and what was used when performing Topeng Ireng. The benefit of this research is to extended the knowledge of the community around Magelang and outside Magelang about Topeng Ireng existence that needs to be preserved and preserved as state-owned cultural assets and as a tribute to ancestors.

scholarly journals PEMBERDAYAAN BADAN USAHA MILIK DESA DALAM MENINGATKAN USAHA DAN EKONOMI MASYARAKAT DENGAN PENDEKATAN KELOMPOK DESA JABON KECAMATAN KALIDAWIR KABUPATEN TULUNGAGUNG

2020 ◽  
Vol 2 (1) ◽  
pp. 99-126
Author(s):  
Siswahyudianto
Keyword(s):  
Rural Communities ◽  
Social Services ◽  
Computer Technology ◽  
Rural Areas ◽  
Poverty Alleviation ◽  
Local Community ◽  
Economic Activities ◽  
Institutional Strengthening ◽  
The People ◽  
The Village

Establishment "BUMDes is also intended to encourage, facilitate, protect and empower economic activities in rural areas that are based on potential" villages or activities both" develop according to the customs and culture of the local community. Village economic institutional strengthening is ultimately intended to improve the socio-economic welfare of rural communities and support the optimization of poverty alleviation programs. The vision of BUMDes "Mekar Jaya" is to realize the welfare of the people of Jabon Village through the development of economic businesses and social services, with the motto, let's build the village together. Based on village deliberations, the village empowerment program concentrates on agriculture, fisheries and computer technology for entrepreneurs.

scholarly journals KAJIAN KRIMINOLOGIS TERJADI TINDAK PIDANA KORUPSI DANA DESA DI DESA PENAGA (Studi Desa Penaga Kabupaten Bintan Kepulauan Riau)

2021 ◽  
Vol 9 (1) ◽  
pp. 8-18
Author(s):  
Heni Widiyani ◽  
Pery Rahendra Sucipta ◽  
Ahmad Ansyari Siregar ◽  
Ayu Efritadewi
Keyword(s):  
Rural Communities ◽  
State Government ◽  
Rural Areas ◽  
Actual Situation ◽  
Government Structure ◽  
Legal Literature ◽  
The People ◽  
Community Economy ◽  
The Guardian ◽  
The Village

Corruption that occurs in rural areas is very disturbing because it greatly affects the lives of rural communities, villages as the lowest government in the Indonesian state government structure are formed so that there is independence and progress and prevent the movement of people to cities. Corruption makes the infrastructure in the village not achieved according to the needs of the community. This juridical empirical research is to collect legal literature and compare the actual situation that occurs in the community by conducting interviews so as to find the facts and data needed, then the required data is collected, then the identification of the problem is carried out which ultimately comes to solving the problem . The people of the guardian village currently cannot enjoy the facilities that have been corrupted by the village head and the community economy poured out through BUMDES is not running properly due to the effects of corruption that occurred in 2017.Keywords : Corruption, Village Fund, Penaga Village

Requirements Engineering in the ICT4D Domain

2011 ◽  
pp. 52-65
Author(s):  
Kristina Pitula ◽  
Daniel Sinnig ◽  
Thiruvengadam Radhakrishnan
Keyword(s):  
Rural Communities ◽  
Software Development ◽  
Requirements Engineering ◽  
Information And Communication Technologies ◽  
Rural Areas ◽  
Local Population ◽  
Communication Technologies ◽  
Social Contexts ◽  
The People ◽  
Information And Communication

Requirements engineering is an important stage in any software development. It is more so in the case of software development for social development projects in rural areas of the developing countries. ICT4D which stands for “Information and Communication Technologies for Development” is gaining more and more attention as computing is more widely affordable. This article is concerned with requirements engineering in the ICT4D domain. In many developing counties, a significant effort is being put into providing people in rural areas with access to digital content and services by using Information and Communication Technologies. Unfortunately most ICT4D projects pursue a top-down development model which is driven by the technology available and not by the very needs and social problems of the people living in rural communities (Frohlich et al., 2009). Existing technologies are often applied in a non-inclusive manner with respect to the local population, without sufficient adaptation or re-invention, and often without regard for user’s needs and their social contexts.

Study of a small-scale standing-wave thermoacoustic engine

2009 ◽  
Vol 224 (1) ◽  
pp. 133-141 ◽  
Author(s):  
S Jung ◽  
K I Matveev
Keyword(s):  
Standing Wave ◽  
Acoustic Pressure ◽  
Acoustic Power ◽  
Vitreous Carbon ◽  
Working Fluid ◽  
Small Scale ◽  
Balance Theory ◽  
Reticulated Vitreous Carbon ◽  
Thermoacoustic Engine ◽  
Atmospheric Air

This article reports experimental and modelling results obtained with a small-scale standing-wave thermoacoustic engine. Reticulated vitreous carbon is used as the stack material and atmospheric air as the working fluid. The engine is tested with resonators of variable lengths in the range 57–124 mm. The engine starts generating sound at temperature differences of 200–300 °C between the hot and cold parts of the system. The acoustic pressure amplitudes up to 2 kPa are measured inside the resonator in the excited regimes. A simplified energy-balance theory adequately predicts a trend in the temperature difference for the sound onset, while underestimating actual values. Model estimations show that the stack-generated acoustic power reaches 100 mW at the stack-based efficiencies of several per cent.

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