منابع مشابه
Developing the MTO Formalism
The TB-LMTO-ASA method is reviewed and generalized to an accurate and robust TB-NMTO minimal-basis method, which solves Schrödinger’s equation to Nth order in the energy expansion for an overlapping MT-potential, and which may include any degree of downfolding. For N = 1, the simple TBLMTO-ASA formalism is preserved. For a discrete energy mesh, the NMTO basis set may be given as: χ (r) = ∑ n φ ...
متن کاملSubstation Protection and the Climatic Environment of Niger Delta
Substation protection is one of the most important schemes in power system. Rainfall, Humidity, Temperature and contaminations do not produce over voltage but are capable of lowering the flashover voltage and affect the operation of the equipment. The aim of the study was to identify the climatic factors especially the average lightning days and / or ground flash density so that substation desi...
متن کاملOutcome of Teenage Pregnancy in the Niger Delta of Nigeria
BACKGROUND Young maternal age at delivery has been proposed as risk factor for adverse pregnancy outcome, it occurs in all races, faiths, socioeconomic statuses, and regions. Teenage pregnancy can have serious physical consequences and teenage mothers are likely to be unmarried, poor and remain uneducated. The objective of the study was to evaluate risk factors associated with teenage pregnancy...
متن کاملTechnical Efficiency of Family Poultry Production in Niger-delta, Nigeria
This study assessed the technical effi ciency of family poultry production in NigerDelta, Nigeria. The technical effi ciency estimate shows that the technical effi ciency of family poultry ranges between 0.09 and 0.63, with mean of 0.22. This indicates that on the average, the respondents are 22% effi cient in the use of combination of their inputs. The elasticity estimate of 12.29 indicates th...
متن کاملHypertension in Rural Niger Delta of Nigeria: Frequency and Correlates
Background And Aim: Hypertension remains a major cardiovascular disease globally and in particular sub-Saharan Africa including Nigeria. The challenge of control is the continuous monitoring of prevalence, risk factors and institution of primary prevention measures and adequate treatment programmes. This study reports the frequency of hypertension and its correlates in a rural adult population....
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ژورنال
عنوان ژورنال: SAGE Open
سال: 2014
ISSN: 2158-2440,2158-2440
DOI: 10.1177/2158244014556994