Foreign investment, government expenditure, and economic growth in Malaysia

This study uses the ordinary least squares technique to examine the effect of foreign investment and government expenditure on the growth in GDP per capita in Malaysia over the period 1978-2005. The regression results showed that the growth of export and ratio of government expenditure to GDP are the driving forces in enhancing the economic growth in Malaysia. Foreign investment and previous year real income per capita growth depict positive impact, whereas population growth exerts a negative impact on economic growth

Universal inequalities for the eigenvalues of Schrodinger operators on submanifolds

We establish inequalities for the eigenvalues of Schr\"odinger operators on compact submanifolds (possibly with nonempty boundary) of Euclidean spaces, of spheres, and of real, complex and quaternionic projective spaces, which are related to inequalities for the Laplacian on Euclidean domains due to Payne, P\'olya, and Weinberger and to Yang, but which depend in an explicit way on the mean curvature. In later sections, we prove similar results for Schr\"odinger operators on homogeneous Riemannian spaces and, more generally, on any Riemannian manifold that admits an eigenmap into a sphere, as well as for the Kohn Laplacian on subdomains of the Heisenberg group. Among the consequences of this analysis are an extension of Reilly's inequality, bounding any eigenvalue of the Laplacian in terms of the mean curvature, and spectral criteria for the immersibility of manifolds in homogeneous spaces.Comment: A paraitre dans Transactions of the AM

Deindividuasi dan Kontrol Diri Terhadap Perilaku Perundungan di Media Sosial Instagram Pada Remaja

Penelitian ini bertujuan untuk menguji secara empirik ada atau tidaknya pengaruh deindividuasi dan kontrol diri terhadap perilaku perundungan di media sosial instagram. Penelitian ini menggunakan pendekatan kuantitatif. Subjek penelitian ini adalah remaja sebanyak 86 orang. Teknik sampel yang digunakan adalah purposive sampling, dengan karakteristik responden berusia 13-18 tahun, memiliki kecendrungan perilaku perundungan di media sosial, memiliki akun di media sosial instagram dan aktif menggunakan media sosial instagram. Alat ukur dalam penelitian ini menggunakan skala perundungan di media sosial, skala deindividuasi dan skala kontrol diri. Skala tersebut disusun dengan skala model likert. Teknik analisa data menggunakan uji regresi berganda. Hasil dari penelitian ini menunjukan bahwa terdapat pengaruh deindividuasi dan kontrol diri terhadap perilaku perundungan di media sosial instagram dengan nilai signifikansi p = 0.000, F hitung 11.519 > F tabel = 3.110 dan nilai R2 = 0.217. Pada deindividuasi terhadap perundungan di media sosial terdapat pengaruh dengan nilai koefisien beta (β) = 0.461, nilai t hitung = 4.743 > t tabel = 1.989 dan nilai p = 0.000. Pada kontrol diri terhadap perundungan di media sosial tidak terdapat pengaruh dengan nilai koefisien beta (β) = 0.052, nilai t hitung= 0.534 F table = 3.110 and R2 value = 0.217. On deindividuation toward cyberbullying there was regression with the value of coefficient beta (β) = 0.461, t count value = 4.743 > t table = 1.989 and p value = 0.000. On readiness for change toward job insecurity there was regression with the value of coefficient beta (β) = 0.052, t count value= 0.534 < t table = 1.989 and p value = 0.595

Prevalence of an Entomopathogenic Fungus, Hirsutella citriformis on Leucaena Psyllid, Heterapsylla cubana, in Malaysia

The leucaena psyllid, Heteropsylla cubana Crawford (Homoptera: Psyllidae) is a serious exotic pest of Leucaena leucocephala (Lam.) (Leguminosae) in Southeast Asia, Pacific Islands, Hawaii and Australia. Even though the insect is already widespread throughout Malaysia, no information on the entomopathogens associated with this pest has been recorded. This study reports, for the first time, the occurrence of an entomopathogenic fungus, Hirsutella citriformis Speare (Deuteromycotina: Hyphomycetes) on the leucaena psyllid, H. cubana in Malaysia. Results from monthly sampling of the psyllid over a period of one year established that the leucaena psyllid, H. cubana was susceptible to infection by the fungus, H. citriformis. Dead psyllids were found mummified and cemented by cream-coloured mycelia to the leaves and branches of the leucaena plant. The results also showed that adult psyllids were more prone to fungal infection than nymphs. The adult population had an average infection rate of about 20% while nymphs had an infection rate of less than 2%

On sums of eigenvalues of elliptic operators on manifolds

We use the averaged variational principle introduced in a recent article on graph spectra [7] to obtain upper bounds for sums of eigenvalues of several partial differential operators of interest in geometric analysis, which are analogues of Kr{\"o}ger 's bound for Neumann spectra of Laplacians on Euclidean domains [12]. Among the operators we consider are the Laplace-Beltrami operator on compact subdomains of manifolds. These estimates become more explicit and asymptotically sharp when the manifold is conformal to homogeneous spaces (here extending a result of Strichartz [21] with a simplified proof). In addition we obtain results for the Witten Laplacian on the same sorts of domains and for Schr{\"o}dinger operators with confining potentials on infinite Euclidean domains. Our bounds have the sharp asymptotic form expected from the Weyl law or classical phase-space analysis. Similarly sharp bounds for the trace of the heat kernel follow as corollaries.Comment: in Journal of Spectral Theory, 201

Eigenvalue upper bounds for the magnetic Schroedinger operator

We study the eigenvalues of the magnetic Schroedinger operator associated with a magnetic potential A and a scalar potential q, on a compact Riemannian manifold M, with Neumann boundary conditions if the boundary is not empty. We obtain several bounds for the spectrum. Besides the dimension and the volume of the manifold, the geometric quantity which plays an important role in these estimates is the first eigenvalue of the Hodge-de Rham Laplacian acting on co-exact 1-forms. In the 2-dimensional case, this is nothing but the first positive eigenvalue of the Laplacian acting on functions. As for the dependence of the bounds on the potentials, it brings into play the mean value of the scalar potential q, the L^2-norm of the magnetic field B=dA, and the distance, taken in L^2, between the harmonic component of A and the subspace of all closed 1-forms whose cohomology class is integral (that is, having integral flux around any loop). In particular, this distance is zero when the first cohomology group is trivial.Comment: This preprint partially replaces arXiv: 1611.0193