scholarly journals Measuring Regional Inequality: A Comparison of Coefficient of Variation and Hoover Concentration Index

2009 ◽  
Vol 2 (1) ◽  
pp. 25-34 ◽  
Author(s):  
Yefang Huang ◽  
Yee Leung
Keyword(s):  
Coefficient Of Variation ◽  
Concentration Index ◽  
Regional Inequality

scholarly journals Trend and Variability Analysis of Rainfall and Temperature Trends in Ilorin Metropolis, Kwara State, Nigeria

2021 ◽  
Vol 74 (1-3) ◽  
Author(s):  
Oluwadare Akinyemi
Keyword(s):  
Coefficient Of Variation ◽  
Concentration Index ◽  
Physical Parameters ◽  
Government Agencies ◽  
Positive Slope ◽  
Precipitation Concentration Index ◽  
Variability Analysis ◽  
Temperature Trends ◽  
Increasing Trend ◽  
High Degree

ABSTRACT Rainfall and temperature are the most important physical parameters that influence climate. This paper examines the trend and variability of rainfall and temperature of Ilorin township in Nigeria between2010- 2018, using standard statistical descriptors. Rainfall had an increasing trend (positive slope value of 5.30), moderate precipitation concentration index of 12.15 percent and extremely high degree of variability with a coefficient of variation ranging between 33.54 percent and 155.73 percent. Temperature also had a slight warming or increasing trend (positive slope value of 0.012) with minimal degree of variability of coefficient of variation between 5.49 percent and 7.31 percent. The oscillating structure of both rainfall and temperature anomalies further confirm yearly fluctuations as well as change in the distribution and characteristics. It is recommended that government and non-government agencies should formulate plans and policies that will accommodate changes in rainfall and temperature patterns to successfully manage the environment.

scholarly journals Spatial analysis of rainfall daily trends and concentration in Chile

2014 ◽  
pp. 53 ◽  
Author(s):  
Pablo Andrés Sarricolea Espinoza ◽  
Javier Martín-Vide
Keyword(s):  
Spatial Analysis ◽  
Coefficient Of Variation ◽  
Seasonal Variability ◽  
Concentration Index ◽  
Rainfall Amount ◽  
The South ◽  
Central Chile ◽  
Size Classes ◽  
The North ◽  
Rainy Days

Chile has a great diversity of climates. In average, the rainfall differs between 0.7 mm (Iquique, North) and 1,814.8 mm (Valdivia, South) according to the main meteorological stations. The small rainfall amount in the North concentrates on few days, with only 3 days per year. In Central Chile, there are among 16 to 42 rainy days and in the South more than 150 days. In order to understand the correlation between precipitation totals (grouped into 1-mm size classes) and the number of rain days, climatologists use the Concentration Index (CI). In the present study, this index was calculated for 17 meteorological stations across Chile for the period between 1965-2005, also using other indicators: Coefficient of Variation, Temporal irregularity and the relation of precipitation with teleconnections. The results of the CI show a high variation among the regions (from 0.51 to 0.76). The highest one was recorded in La Serena (30º S), with values higher than 0.70. From La Serena, the CI decreases gradually, reaching values of about 0.60 in the Atacama Region (North) and further South in the Biobío Region. The concentration of rainfall has increased in the last sub-period (1985-2005), as inter-seasonal variability.

scholarly journals Effective Size and Number of Components

1981 ◽  
Vol 10 (1) ◽  
pp. 63-81 ◽  
Author(s):  
Rein Taagepera ◽  
Bernard Grofman
Keyword(s):  
General Formula ◽  
Coefficient Of Variation ◽  
Concentration Index ◽  
Faculty Perceptions ◽  
Effective Size ◽  
Effective Number ◽  
Weighted Mean ◽  
Number Of Components ◽  
Special Cases ◽  
Index Of Diversity

Two families of indices are defined which may be used to characterize the effective number of components in systems with unequal component sizes. A general formula is staled relating size, effective size, and effective number of components. Special cases of this formula are considered which yield formulae identical or closely related to a variety of other expressions including entropy, the Greehberg-Lieberson index of diversity (also known as the Rae-Taylor fractionalization index), the Herfindahl-Hirschman concentration index, the coefficient of variation, the ordinary mean, the weighted mean and the harmonic mean. Applications of these formulae are considered for a variety of problems, including measurement of population and GNP concentrations, distinguishing between density and crowding, and reconciling differing student and faculty perceptions of average class size.

400-P: High Levels of Glycemic Coefficient of Variation Are Associated with Higher Hypoglycemia Episodes in T1D Adults in a Brazilian Tertiary Hospital

Diabetes ◽  
2020 ◽  
Vol 69 (Supplement 1) ◽  
pp. 400-P
Author(s):  
THAIS B. BRASIL ◽  
ANDREI C. SPOSITO ◽  
BEATRIZ ADACHI ◽  
WALKYRIA M. VOLPINI ◽  
ELIZABETH J. PAVIN
Keyword(s):  
Coefficient Of Variation ◽  
Tertiary Hospital

Sustainability and adaptability of regional development in the conditions of digitalization

2020 ◽  
Vol 19 (9) ◽  
pp. 1550-1613
Author(s):  
O.E. Akimova ◽  
S.K. Volkov ◽  
E.A. Gladkaya ◽  
I.M. Kuzlaeva
Keyword(s):  
Sustainable Development ◽  
Regional Development ◽  
Economic Behavior ◽  
Regional Inequality ◽  
Environmental Damage ◽  
Economic Potential ◽  
Human Welfare ◽  
Long Time ◽  
The Stability ◽  
Smart Technologies

Subject. The article discusses the sustainability of regional economy development, its definition, and the substance of sustainable development. Objectives. We aim at performing a comprehensive analysis of indicators of sustainability and adaptability of regional development in the context of digitalization, formulating a strategy for economic behavior that takes into account the multidimensional nature of regional inequality and is focused on boosting the economic potential of regions. Methods. The study draws on dialectic and systems approaches, general scientific methods of retrospective, situational, economic and statistical, and comparative analysis. Results. The sustainability of the region focuses on improving the human welfare over long time horizon. This happens in three areas, i.e. maximizing the efficiency of resource use; ensuring justice and democracy; minimizing resource consumption and environmental damage. The stability of the region can be assessed by using one parameter, or by combining the parameters in accordance with the type of region and expected results. Conclusions. The adaptation of a region to changing conditions depends on its type (‘adapted’, ‘adaptive’, and ‘non-adapted’). Regional inequality has two main components: difference in economic potential and social satisfaction of residents. Another component, affecting the stability and adaptability of regions, is the level of their digitalization. However, some regions have only formally embarked on the path of digitalization. Moreover, a focus on smart technologies, solutions and digitalization often leads to ignoring the goals of sustainable development. Smart technologies should be aimed at ensuring sustainability within the framework of the smart sustainable city concept.

KELAYAKAN DAN RISIKO USAHATANI JERUK KEPROK MADURA DI KABUPATEN SUMENEP

2013 ◽  
Vol 3 (2) ◽  
Author(s):  
Isdiantoni Isdiantoni
Keyword(s):  
Discount Rate ◽  
Coefficient Of Variation

Menurut Direktorat Budidaya Tanaman Buah Deptan (2009), potensi pengembangan tanaman jeruk keprok Madura di Kabupaten Sumenep, cukup besar yaitu seluas 400 hektar yang tersebar di 3 (tiga) kecamatan, yaitu Kecamatan Dasuk, Kecamatan Ambunten dan Kecamatan Pasongsongan. Salah satu faktor yang dapat menenunjang keberhasilan pengembangan komoditas jeruk ini, adalah kelayakan ekonomis (menguntungkan secara finansial).Dipihak lain, petani sebagai pelaku utama kegiatan pengembangan jeruk keprok Madura dan sebagai produsen, harus mengetahui kemungkinan resiko yang akan diterimanya dan besarnya keuntungan dari usaha ini. Pengetahuan terhadap hubungan antara resiko dan keuntungan ini, akan memberikan dasar pertimbangan yang rasional bagi petani dalam mengembangkan komoditas jeruk keprok Madura. Informasi/data pada penelitian ini, diperoleh dari petani jeruk keprok Madura yang bibitnya berasal dari cangkokan dan mulai dibuahkan pada umur 3 (tiga) tahun.Pengukuran kelayakan finansial usahatani jeruk keprok Madura dilakukan dengan melihat kriteria investasi, dan pengukuran terhadap hubungan antara tingkat resiko dengan keuntungan, diukur secara statistik dengan melihat koefisien variasi (coefficient of variation) dan batas bawah keuntungan. Kriteria investasi pada usahatani jeruk keprok Madura menunjukkan nilai NPV sebesar Rp. 118,342,271 (> 0), Net B/C sebesar 1.38 (> 1) dan IRR sebsar 23,7% (> discount rate), sehingga proyek usahatani jeruk keprok Madura dapat dikatakan go! (layak dilaksanakan).Periode yang diperlukan untuk menutup biaya investasi, yaitu 9 tahun 10 bulan (di bawah dari umur ekonomis proyek), sehingga proyek ini layak diusahakan. Selama periode proyek (15 tahun) nilai koefisien variasi (CV) didapatkan 0.588 (CV > 0.5) dan nilai batas bawah keuntungan (L) didapatkan sebesar Rp. (31,204,042) yang menunjukkan L < 0.  Dengan demikian, pengusahatani jeruk keprok Madura harus berani menanggung resiko (kerugian) sebesar  Rp. 31,204,042,- pada setiap proses produksi. Kata kunci: Usahatani Jeruk Keprok Madura, Kelayakan, dan Resiko Finansial

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