KadRTT: Routing with network proximity and uniform ID arrangement in Kademlia

Author(s):  
Hidehiro Kanemitsu ◽  
Hidenori Nakazato
Keyword(s):  
2019 ◽  
Vol 8 (8) ◽  
pp. 336
Author(s):  
Minmin Li ◽  
Renzhong Guo ◽  
You Li ◽  
Biao He ◽  
Yong Fan

Evaluation of the railway network distribution and its impacts on social and economic development has great significance for building an efficient and comprehensive railway system. To address the lack of evaluation indicators to assess the railway network distribution pattern at the macro scale, this study selects eight indicators—railway network density, railway network proximity, the shortest travel time, train frequency, population, Gross Domestic Product (GDP), the gross industrial value above designated size, and fixed asset investment—as the basis of an integrated railway network distribution index which is used to characterize China’s railway network distribution using geographical information system (GIS) technology. The research shows that, in 2015, the railway network distribution was low in almost half of China’s counties and that there were obvious differences in distribution between counties in the east and west. In addition, multiple dense areas of railway network distribution were identified. The results suggest that it might be advisable to strengthen the connections between large and small cities in the eastern region and that the major urban agglomerations in the midwest could focus on strengthening the construction of railway facilities to increase the urban vitality of the western region. This study can be used to guide the optimization of railway network structures and provide a macro decision-making reference for the planning and evaluation of major railway projects in China.


2006 ◽  
Vol 36 (3) ◽  
pp. 39-50 ◽  
Author(s):  
Puneet Sharma ◽  
Zhichen Xu ◽  
Sujata Banerjee ◽  
Sung-Ju Lee
Keyword(s):  

2013 ◽  
Vol 28 (1) ◽  
pp. 99-129 ◽  
Author(s):  
Marcel Fafchamps ◽  
Måns Söderbom

Author(s):  
Imre Lengyel ◽  
Zsolt Fenyővári ◽  
Bendedek Nagy

Az innovatív vállalati kapcsolatokkal foglalkozó vizsgálatok sokasága az innovációs folyamatok „kettősségéről” ad számot. Egyrészt felértékelődött a térbeli közelség szerepe, emiatt az innovatív vállalkozások, intézmények térben koncentrálódnak, főleg a nagyvárosokban. Másrészt szerteágazó hálózatok jöttek létre a különböző országokban működő innovatív vállalatok, intézetek között, amelyek többsége a nagy távolságok ellenére is sikeres. Mindezen megfigyelések arra utalnak, hogy pontosítani kell a közelség és távolság üzleti szerepéről vallott ismereteket a változó globalizációs feltételekhez igazítva. A szerzők tanulmányukban áttekintik a térbeli közelség szerepének főbb jellemzőit az innovatív tevékenységeken alapuló vállalati együttműködések kialakulásában és fenntartásában. A hagyományos felfogások rövid ismertetése után a „hálózati közelség”, másképpen „kapcsolati közelség” (relational proximity) egyes típusait elemzik. Részletesen kitérnek a regionális klaszterek és a lokális innovatív miliő főbb jellemzőire, amelyek a térbeli és a kapcsolati közelségekből eredő előnyöket egyaránt hasznosítják. Ezek a mérvadó nemzetközi tapasztalatok itthon is alkalmazhatók az egyetemi és vállalati együttműködések, illetve a helyi gazdaságfejlesztési és vállalkozásfejlesztési programok kidolgozásakor. ________ Multiple studies of innovative business relations give an account about „the double character” of innovative processes. On the one hand, the role of proximity has been appreciated, for this reason, the innovative companies, institutes are concentrated in space, especially in big cities. On the other hand extensive networks have been established among innovative companies, institutes operating in the different countries, most of which are successful in spite of the long distance. All these observations suggest there is a need to clarify business skills on the role of proximity and distance, tailored to the changing conditions of globalization. In their study the authors review the role of the main features of spatial proximity in formation and maintenace of corporate cooperation based on innovative activities. After a brief description of traditional concepts certain types of „network proximity” otherwise relational proximity are analyzed. They cover main features of regional clusters and the local innovative environment which utilize advantages coming both from spatial and relational proximities. This leading international experience are applicable at home as well when elaborating academic and corporate cooperation resp. local development programs for the economy and corporations.


2021 ◽  
pp. 089124242110466
Author(s):  
Xiaochu Hu ◽  
Michael J. Dill ◽  
Sarah S. Conrad

This study contributes to the current understanding of what drives physicians to practice in rural areas by analyzing new, comprehensive survey data of practicing physicians in the United States. This research confirmed that rural origin is a powerful and reliable predictor for rural practice and revealed that new and experienced physicians have different priorities regarding location choice. Physicians choosing rural practice locations are more likely to be motivated by compensation, the resemblance of the environment to the one they grew up in, patient needs, and prenegotiated service obligations or visa/immigration status. They are less likely to attribute their location choice to social network proximity. These findings have important implications for salary incentives and policy initiatives aimed at increasing the rural physician workforce. The results of this study will help decrypt the difficulties rural areas face in attracting and retaining medical and other professionals and inform policy development.


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