Determination of depths to magnetic sources within Abakaliki–Afikpo area and environs, Southeastern Nigeria: implications for mineral and hydrocarbon prospectivity

2021 ◽  
pp. 1-16
Author(s):  
F. X. O. Ugodulunwa ◽  
A. C. Ekwe ◽  
E. M. Abraham ◽  
C. G. Chukwu ◽  
R. M. Onwe
Keyword(s):  
Southeastern Nigeria

scholarly journals Determination of Socio-economic Influence of Tillage and Termite on Incidence, Severity and Yield of Cassava (Manihot esculenta Crantz) in Selected Owerri Agricultural Zones, Southeast Nigeria

2019 ◽  
pp. 1-8
Author(s):  
K. O. Ogbedeh ◽  
T. T. Epidi ◽  
S. A. Dialoke ◽  
B. O. Bosah ◽  
C. A. Emenyonu ◽  
...  
Keyword(s):  
Manihot Esculenta ◽  
High Water ◽  
Field Investigation ◽  
Descriptive Statistics ◽  
Manihot Esculenta Crantz ◽  
Southeastern Nigeria ◽  
Questionnaire Administration ◽  
Cassava Production ◽  
Selection Of

The field investigation was conducted in 2015 in four selected Agricultural zones of Owerri, Southeastern Nigeria namely Ezinnihite Mbaise (Zone 1), Owerri North (Zone 2), Mbaitoli (Zone 3) and Owerri West (Zone 4). A random selection of thirty cassava farmers from each of the study areas was made. The sample size was made up of a total of one hundred and twenty (120) respondents. Data were collected through structural questionnaire administration to the respondents on the four selected zones and were analyzed using Descriptive Statistics such as the use of Percentages, Frequencies and Means. Result indicates that majority of the respondents sampled in this study practiced mounding for their cassava production. Also greater proportion of them (respondents) claimed that apart from other known endemic pests like grasshopper, mealybug, green mites etc., termite poses greater threat to their cassava farm. However, highest cassava yield occurred in areas where mounds and/or ridges were practiced. In view of the prevailing high water table of the sampled areas, farmers are advised to continue with the practice of mounding and/or ridging for their cassava production.

Determination of aquifer parameters from geosounding data in parts of Afikpo Sub-basin, southeastern Nigeria

2020 ◽  
Vol 13 (4) ◽  
Author(s):  
Amobi C. Ekwe ◽  
Alexander I. Opara ◽  
Chukwudike G. Okeugo ◽  
George-best Azuoko ◽  
Elijah E. Nkitnam ◽  
...  
Keyword(s):  
Southeastern Nigeria ◽  
Aquifer Parameters

Galactic orbits of stars

1966 ◽  
Vol 25 ◽  
pp. 93-97
Author(s):  
Richard Woolley
Keyword(s):  
Globular Cluster ◽  
Potential Field ◽  
High Velocity ◽  
Velocity Vector ◽  
Variable Stars ◽  
The Sun ◽  
Proper Motions ◽  
Rr Lyrae ◽  
The Galaxy

It is now possible to determine proper motions of high-velocity objects in such a way as to obtain with some accuracy the velocity vector relevant to the Sun. If a potential field of the Galaxy is assumed, one can compute an actual orbit. A determination of the velocity of the globular clusterωCentauri has recently been completed at Greenwich, and it is found that the orbit is strongly retrograde in the Galaxy. Similar calculations may be made, though with less certainty, in the case of RR Lyrae variable stars.

Distance to SN 1987A and the LMC

1999 ◽  
Vol 190 ◽  
pp. 549-554
Author(s):  
Nino Panagia
Keyword(s):  
Angular Size ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Light Curves ◽  
Distance Modulus ◽  
Absolute Size ◽  
Sn 1987A

Using the new reductions of the IUE light curves by Sonneborn et al. (1997) and an extensive set of HST images of SN 1987A we have repeated and improved Panagia et al. (1991) analysis to obtain a better determination of the distance to the supernova. In this way we have derived an absolute size of the ringRabs= (6.23 ± 0.08) x 1017cm and an angular sizeR″ = 808 ± 17 mas, which give a distance to the supernovad(SN1987A) = 51.4 ± 1.2 kpc and a distance modulusm–M(SN1987A) = 18.55 ± 0.05. Allowing for a displacement of SN 1987A position relative to the LMC center, the distance to the barycenter of the Large Magellanic Cloud is also estimated to bed(LMC) = 52.0±1.3 kpc, which corresponds to a distance modulus ofm–M(LMC) = 18.58±0.05.

International determination of the total motion of the pole

1961 ◽  
Vol 13 ◽  
pp. 29-41
Author(s):  
Wm. Markowitz
Keyword(s):  
Secular Motion ◽  
The Future

A symposium on the future of the International Latitude Service (I. L. S.) is to be held in Helsinki in July 1960. My report for the symposium consists of two parts. Part I, denoded (Mk I) was published [1] earlier in 1960 under the title “Latitude and Longitude, and the Secular Motion of the Pole”. Part II is the present paper, denoded (Mk II).

Time and Latitude in South Africa

1972 ◽  
Vol 1 ◽  
pp. 27-38
Author(s):  
J. Hers
Keyword(s):  
South Africa ◽  
Cape Town ◽  
Astronomical Observations ◽  
Royal Observatory ◽  
The Republic ◽  
Astronomical Determination ◽  
Limited Accuracy ◽  
Better Than

In South Africa the modern outlook towards time may be said to have started in 1948. Both the two major observatories, The Royal Observatory in Cape Town and the Union Observatory (now known as the Republic Observatory) in Johannesburg had, of course, been involved in the astronomical determination of time almost from their inception, and the Johannesburg Observatory has been responsible for the official time of South Africa since 1908. However the pendulum clocks then in use could not be relied on to provide an accuracy better than about 1/10 second, which was of the same order as that of the astronomical observations. It is doubtful if much use was made of even this limited accuracy outside the two observatories, and although there may – occasionally have been a demand for more accurate time, it was certainly not voiced.

Sign in / Sign up

Export Citation Format

Share Document