scholarly journals Ionospheric Effects on GPS Signal in Low-Latitude Region: A Case Study Review of South East Asia and Africa

2015 ◽  
Vol 34 (3) ◽  
pp. 523 ◽  
Author(s):  
I Abba ◽  
WAWZ Abidin ◽  
T Masri ◽  
KH Ping ◽  
MS Muhammad ◽  
...  
Keyword(s):  
East Asia ◽  
South East Asia ◽  
Low Latitude ◽  
Ionospheric Effects ◽  
Latitude Region ◽  
Study Review

scholarly journals Statistical correlation of spectral broadening in VLF transmitter signal and low-frequency ionospheric turbulence from observation on DEMETER satellite

2008 ◽  
Vol 8 (5) ◽  
pp. 1105-1111 ◽  
Author(s):  
A. Rozhnoi ◽  
M. Solovieva ◽  
O. Molchanov ◽  
O. Akentieva ◽  
J. J. Berthelier ◽  
...  
Keyword(s):  
Middle Latitude ◽  
Statistical Correlation ◽  
Occurrence Rate ◽  
Signal Spectrum ◽  
Ionospheric Turbulence ◽  
Low Latitude ◽  
Demeter Satellite ◽  
Ion Cyclotron ◽  
Latitude Region

Abstract. In our earlier papers we have found the effect of VLF transmitter signal depression over epicenters of the large earthquakes from observation on the French DEMETER satellite that can be considered as new method of global diagnostics of seismic influence on the ionosphere. At present paper we investigate a possibility VLF signal-ionospheric turbulence interaction using additional characteristic of VLF signal-spectrum broadening. This characteristic is important for estimation of the interaction type: linear or nonlinear scattering. Our main results are the following: – There are two zones of increased spectrum broadening, which are centered near magnetic latitudes Φ=±10° and Φ=±40°. Basing on the previous case study research and ground ionosonde registrations, probably it is evidence of nonlinear (active) scattering of VLF signal on the ionospheric turbulence. However occurrence rate of spectrum broadening in the middle-latitude area is higher than in the near-equatorial zone (~15–20% in comparison with ~100% in former area) that is probably coincides with the rate of ionospheric turbulence. – From two years statistics of observation in the selected 3 low-latitude regions and 1 middle-latitude region inside reception area of VLF signal from NWC transmitter we find a correlation of spectrum broadening neither with ion-cyclotron noise (f=150–500 Hz), which possibly means poor representation of the turbulence by the noise due to its mixture with natural ELF emission (which correlates with whistler), nor with magnetic storm activity. – We find rather evident correlation of ion-cyclotron frequency noise, VLF signal depression and weak correlation of spectrum broadening with seismicity in the middle-latitude region over Japan. But in the low-latitude regions we do not find such a correlation. Statistical decrease of VLF signal supports our previous case study results. However rather weak spectrum broadening-seismicity statistical correlation means probably that passive scattering prevails upon nonlinear (active) one.

scholarly journals Politics and Health at the WHO Regional Office for South East Asia: The Case of Portuguese India, 1949–61

2017 ◽  
Vol 61 (3) ◽  
pp. 380-400
Author(s):  
Monica Saavedra
Keyword(s):  
East Asia ◽  
International Health ◽  
Health Policies ◽  
World Health ◽  
South East Asia ◽  
Regional Office ◽  
Post Colonial ◽  
Nation States ◽  
The Face

This paper analyses how the 1950–61 conflict between Portugal and India over the territories that constituted Portuguese India (Goa, Daman and Diu) informed Portugal’s relations with the World Health Organization’s Regional Office for South East Asia (SEARO). The ‘Goa question’ determined the way international health policies were actually put into place locally and the meaning with which they were invested. This case study thus reveals the political production of SEARO as a dynamic space for disputes and negotiations between nation-states in decolonising Asia. In this context, health often came second in the face of contrasting nationalistic projects, both colonial and post-colonial.

scholarly journals Adaptando la agricultura al cambio climático

2012 ◽  
Vol 11 (2) ◽  
pp. 109 ◽  
Author(s):  
Ana Iglesias ◽  
Sonia Quiroga ◽  
Agustín Diz ◽  
Luis Garrote
Keyword(s):  
Climate Change ◽  
Water Resources ◽  
East Asia ◽  
Water Scarcity ◽  
Northern Europe ◽  
South East Asia ◽  
Costs And Benefits ◽  
Low Latitude ◽  
Current Water ◽  
Northern Russia

<div data-canvas-width="503.8516666666665">We evaluate the potential impacts and measure the potential limits of adaptation of agri culture to climate change. Pressures on land and water resources are expected to intensify existing risks in low latitude areas – e.g., South-East Asia deltas – and in regions with current water scarcity – e.g. Mediterranean, and create new opportunities in some northern temperate areas – e.g., Northern Russia, Northern Europe. The need to respond to these risks and opportunities is addressed by evaluating the costs and benefits of a number of technical and policy actions. The discussion aims to assist stakeholders facing the adaptation challenge and develop measures to reduce the vulnerability of the sector to climate change.</div>

scholarly journals Towards the Feasibility of Instituting a Philippine Digital Audio Library: A Case Study

2021 ◽  
Vol 8 (2) ◽  
pp. 1-12
Author(s):  
Jia Li
Keyword(s):  
East Asia ◽  
The Philippines ◽  
South East Asia ◽  
Digital Audio ◽  
Music Research ◽  
Field Notes ◽  
Musical Traditions ◽  
The University ◽  
East Asia Region

As a spearhead force in music research, especially in the area of South East Asia region, the University of the Philippines (UP) Center for Ethnomusicology (UPCE) caters to a gigantic collection of audio materials which covers different musics and musical traditions in the Philippines, South East Asia and representative areas from other continents. As an outcome of its former appellation, the “UP Ethnomusicology Archives”, UPCE hosts an ethnomusicological collection of about 2500 hours of recorded music in open reel and cassette tape formats, under the authorship of Jose Maceda whose visionary work of putting together these valuable recorded materials left a treasure for ethnomusicology scholarship and research. In recognition of his influential contribution that made the UCPE an archive and repository of materials on music, philosophy, anthropology and other cognate disciplines, these audio materials, together with field notes, music transcriptions, song texts, photographs, music instruments, music compositions, personal files, about 200 books and journals, all of which he personally initiated and developed as a unified institution resource for music research are called “Jose Maceda Collection”.

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