Modeling fertility curves in Africa

The modeling of fertility patterns is an essential method researchers use to understand world-wide population patterns. Various types of fertility models have been reported in the literature to capture the patterns specific to developed countries. While much effort has been put into reducing fertility rates in Africa, models which describe the fertility patterns have not been adequately described. This article presents a flexible parametric model that can adequately capture the varying patterns of the age-specific fertility curves of African countries. The model has parameters that are interpretable in terms of demographic indices. The performance of this model was compared with other commonly used models and Akaike’s Information Criterion was used for selecting the model with best fit. The presented model was able to reproduce the empirical fertility data of 11 out of 15 countries better than the other models considered.African countries, age-specific fertility rates, Akaikes Information Criterion, complementary error function, cubic/quadratic spline, polynomial model

Program for the exploitation of unused NASA patents Annual report, 1 Jun. 1968 - 31 May 1969

Exploitation of unused NASA patent

Computing toric degenerations of flag varieties

We compute toric degenerations arising from the tropicalization of the full flag varieties $\mathcal{F}\ell_4$ and $\mathcal{F}\ell_5$ embedded in a product of Grassmannians. For $\mathcal{F}\ell_4$ and $\mathcal{F}\ell_5$ we compare toric degenerations arising from string polytopes and the FFLV polytope with those obtained from the tropicalization of the flag varieties. We also present a general procedure to find toric degenerations in the cases where the initial ideal arising from a cone of the tropicalization of a variety is not prime.Comment: 35 pages, 6 figure

Pengaruh Penerapan Cause Related Marketing Pada Program “Satu Untuk Sepuluh” Aqua Terhadap Loyalitas Merek Kelompok Konsumen Muda

Penelitian ini bertujuan untuk menguji pengaruh penerapan cause related marketing pada program “Satu Untuk Sepuluh” produk Aqua terhadap loyalitas merek produk Aqua. Penelitian bersandar kepada jurnal Douwe Van De Brink, et al (2006). Variabel penelitian ini terdiri dari empat variabel bebas yaitu kesesuaian, dan durasi, serta satu variabel terikat, yaitu loyalitas merek. Populasi yang digunakan dalam penelitian ini adalah pemuda di bawah umur 25 tahun di Jakarta. Sampel yang digunakan dalam penelitian ini adalah sebesar 100 koresponden. Data dari koresponden dikumpulkan dengan menggunakan kuesioner dan metode analisis data yang digunakan dalam tugas akhir ini adalah regresi berganda. Hasil dari penelitian ini adalah kesesuaian dan durasi secara signifikan terhadap loyalitas merek. Berdasarkan hasil penelitian tersebut Perusahaan sebaiknya mempertimbangkan untuk mengaplikasikan program cause related marketing guna meningkatkan loyalitas merek. Dengan memperpanjang durasi program, meningkatkan kesesuaian untuk mendapatkan hasil maksimal dari penerapan program tersebut