127 research outputs found
Pengaruh Konsep Diri dan Kebiasaan Belajar terhadap Hasil Belajar Matematika Siswa Kelas VIII SMP YP PGRI 4 MAKASSAR
This research aims to: (1) understand the self-concept of students, habit of students, and students mathematics learning outcomes, (2) determine how the effects of self-concept on students mathematics learning outcomes, the influence of learning habit on students' mathematics learning outcomes, the influence of self-concept and learning habit with the students' mathematics learning outcomes.This research wasex-post facto research. The research was conducted in SMP YP PGRI 4 Makassar with sample 40 people. Data collection in this research used question naires and do cumentation. Technique of data analysis used simple linear regression and multiple regressions. The results showed that (1) the concept of self concept of the students, learning habit, and learning outcomes have a tendency in the high category, (2) a significant difference between self concept and mathematics learning outcomes, learning habit with students' mathematics learning outcomes, self concept and learning habit with the learning outcomes of VIII grademath students of SMP YP PGRI 4 Makassar
An Accelerated Homotopy Perturbation Method for Solving Nonlinear Two-Dimensional Volterra-Fredholm Integrodifferential Equations
We propose and apply coupling of the variational iteration method (VIM) and homotopy perturbation method (HPM) to solve nonlinear mixed Volterra-Fredholm integrodifferential equations (VFIDE). In this approach, we use a new formula called variational homotopy perturbation method (VHPM) and variational accelerated homotopy perturbation method (VAHPM). This approach is based on the form of He’s polynomials and on a new form of He’s polynomials. We discuss the convergence of the technique. Some numerical examples are introduced to verify the efficiency of this technique
Eco Splash-tank, Penyiram Pupuk Cair Dengan Sumber Solar Cell Sebagai Solusi Pemupukan Tanaman Melon
The process of exhausting long melon cultivation is one of the rarity factor farmers grow the The long and exhausting process in melon cultivation is one of factor the farmer rarity to grow up the fruit. The liquid fertilization is done once per 2/3 days. And the spraying can reach up to 23 time until the harvesting. Not maximum liquid fertilization will take longer time and more draining. Thats way, it needs a technology which can solve both these problems in one tool. This tool is called eco splash tank. This tank can also used in remote area without electricity because it is equipped by solar panels for energy source. the one wheel using for design makes the eco splash tank has capacity 30 L and strong. The result for a single full charge can be turned on and pump for 8 hrs. and the charging time for solar panels to accu until full is 9,5 hrs. in a pilot watering can be done up to 30 plants/minute and spray up to 27 plants/minute. It increases from 20 plants/minute(watering) and 17 plants/minute (spraying). In addition the functional benefits are felt by farmers. Because they don\u27t need to hold, pump, and by the fuel. furthermore the design of eco splash tank will be developped for agricultural crops and then RAMP Technopreneurship, patent, and a list of 107 Innovation
The Variational Homotopy Perturbation Method for Solving (
The variational homotopy perturbation method VHPM is used for solving n-dimensional Burgers’ system. Some examples are examined to validate that the method reduced the calculation size, treating the difficulty of nonlinear term and the accuracy
Some exact solutions of F(R) gravity with charged (a)dS black hole interpretation
In this paper we obtain topological static solutions of some kind of pure
gravity. The present solutions are two kind: first type is uncharged
solution which corresponds with the topological (a)dS Schwarzschild solution
and second type has electric charge and is equivalent to the
Einstein--conformally invariant Maxwell solution. In other word,
starting from pure gravity leads to (charged) Einstein- solutions
which we interpreted them as (charged) (a)dS black hole solutions of pure
gravity. Calculating the Ricci and Kreschmann scalars show that there is
a curvature singularity at . We should note that the Kreschmann scalar of
charged solutions goes to infinity as , but with a rate slower
than that of uncharged solutions.Comment: 21 pages, 4 figures, generalization to higher dimensions, references
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Stringy Stability of Charged Dilaton Black Holes with Flat Event Horizon
Electrically charged black holes with flat event horizon in anti-de Sitter
space have received much attention due to various applications in Anti-de
Sitter/Conformal Field Theory (AdS/CFT) correspondence, from modeling the
behavior of quark-gluon plasma to superconductor. Crucial to the physics on the
dual field theory is the fact that when embedded in string theory, black holes
in the bulk may become vulnerable to instability caused by brane
pair-production. Since dilaton arises naturally in the context of string
theory, we study the effect of coupling dilaton to Maxwell field on the
stability of flat charged AdS black holes. In particular, we study the
stability of Gao-Zhang black holes, which are locally asymptotically anti-de
Sitter. We find that for dilaton coupling parameter > 1, flat black
holes are stable against brane pair production, however for 0 < < 1,
the black holes eventually become unstable as the amount of electrical charges
is increased. Such instability however, behaves somewhat differently from that
of flat Reissner-Nordstr\"om black holes. In addition, we prove that the
Seiberg-Witten action of charged dilaton AdS black hole of Gao-Zhang type with
flat event horizon (at least in 5-dimension) is always logarithmically
divergent at infinity for finite values of , and is finite and positive
in the case tends to infinity . We also comment on the robustness of
our result for other charged dilaton black holes that are not of Gao-Zhang
type.Comment: Fixed some confusions regarding whether part of the discussions
concern electrically charged hole or magnetically charged one. No changes to
the result
Modulation of Sn concentration in ZnO nanorod array: intensification on the conductivity and humidity sensing properties
Tin (Sn)-doped zinc oxide (ZnO) nanorod arrays (TZO) were synthesized onto aluminum-doped ZnO-coated glass substrate via a facile sonicated sol–gel immersion method for humidity sensor applications. These nanorod arrays were grown at different Sn concentrations ranging from 0.6 to 3 at.%. X-ray diffraction patterns showed that the deposited TZO arrays exhibited a wurtzite structure. The stress/strain condition of the ZnO film metamorphosed from tensile strain/compressive stress to compressive strain/tensile stress when the Sn concentrations increased. Results indicated that 1 at.% Sn doping of TZO, which has the lowest tensile stress of 0.14 GPa, generated the highest conductivity of 1.31 S cm− 1. In addition, 1 at.% Sn doping of TZO possessed superior sensitivity to a humidity of 3.36. These results revealed that the optimum performance of a humidity-sensing device can be obtained mainly by controlling the amount of extrinsic element in a ZnO film
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