Asymptotic Behavior of Solutions for the Cauchy Problem of a Dissipative Boussinesq-Type Equation

We consider the Cauchy problem for an evolution equation modeling bidirectional surface waves in a convecting fluid. Under small condition on the initial value, the existence and asymptotic behavior of global solutions in some time weighted spaces are established by the contraction mapping principle

Ab-initio study of the bandgap engineering of Al(1-x)Ga(x)N for optoelectronic applications

A theoretical study of Al(1-x)Ga(x)N, based on full-potential linearized augmented plane wave method, is used to investigate the variations in the bandgap, optical properties and non-linear behavior of the compound with the variation of Ga concentration. It is found that the bandgap decreases with the increase of Ga in Al(1-x)Ga(x)N. A maximum value of 5.5 eV is determined for the bandgap of pure AlN which reaches to minimum value of 3.0 eV when Al is completely replaced by Ga. The static index of refraction and dielectric constant decreases with the increase in bandgap of the material, assigning a high index of refraction to pure GaN when compared to pure AlN. The refractive index drops below 1 for photon energies larger than 14 eV results group velocity of the incident radiation higher than the vacuum velocity of light. This astonishing result shows that at higher energies the optical properties of the material shifts from linear to non-linear. Furthermore, frequency dependent reflectivity and absorption coefficients show that peak value of the absorption coefficient and reflectivity shifts towards lower energy in the UV spectrum with the increase in Ga concentration. This comprehensive theoretical study of the optoelectronic properties of the alloys is presented for the first time which predicts that the material can be effectively used in the optical devices working in the visible and UV spectrum.Comment: 18 pages, 7 figure

RISK IN HUMAN RESOURCE MANAGEMENT AND IMPLICATIONS FOR EXTENSION PROGRAMMING - RESULTS OF FOCUS GROUP DISCUSSIONS WITH DAIRY AND GREEN INDUSTRY MANAGERS

Employees are both a source of risk and means of addressing risk, and good employee management practices can increase risk resilience. Forty green industry managers and 22 dairy managers discussed personnel issues related to their industry. Influx of Hispanic labor has changed personnel management and the focus of risk management.Teaching/Communication/Extension/Profession,

Using The “Dash” (Duplicated Answer Sheets) Method In Improving Students' Reading Comprehension

This study aims at finding out to what extent DASH method improves students' reading comprehension and how good the students' improvement regarding their reading comprehension after taught through DASH method. This study was conducted at SMAN 1 Tanete Rilau, Barru Regency. The study used pre-experimental design involving only one class to observe, out of two hundred-eighty population of eleventh-grade students of IPA-II classes at SMAN-1 Tanete Rilau in academic year 2014/2015. The technique sampling was cluster random sampling. The instruments of collecting data used in this study were multiple choice and essay which were used to measure the students' comprehension in reading. Based on the data collected from the students showed that the post-test value is higher than pre-test table, so the null hypothesis is rejected. It means there is an influence of “DASH” (Duplicated Answer Sheets) method on student reading ability. So the students have responsibility and feel enjoy the learning process. It means that can “DASH” (Duplicated Answer Sheets) method be used as one of the alternatives to teach reading. Further study is suggested to conduct the investigation of other teaching method or strategy that can be applied by the teacher to encourage their student in reading comprehension

Cooperative Learning Stad Type Method to Improve the Students Reading Achievement

The objective of the research is to find out the improvement of the students\u27 reading achievement. It is done through cooperative learning STAD type method. It is a classroom action research at the first-grade students of SMP Kartika XX-3 Makassar. The research was conducted in two cycles in which every cycle consisted of four meetings. This research was held at the first year students of SMP KARTIKA XX-3 MAKASSAR. The subject of this research was class VII.B in 2011/2012 academic year. The students\u27 improvement in reading comprehension could be seen in their mean score namely 5,59 in D-test, 6,33 in cycle 1 and then it became 7,29 in cycle 11. The students\u27 literal reading comprehension dealing with the main idea and meaning of the word sentence in reading the text was 5, 65 in D-test 6, 44 in cycle 1 and it became 7, 65 in cycle 11. In D-test in the first meeting, the percentage of students\u27 activeness is 69%, and in the second meeting is 75%, and in the third meeting is 77% while in the last meeting is 82%. And then after the evaluation in the cycle II the improvement of the students\u27 reading comprehension