L. Ambarwati - Academia.edu (original) (raw)
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Papers by L. Ambarwati
JPI (Jurnal Pendidikan Indonesia), 2019
The aim of this research was to improve mathematical written communication and mathematical dispo... more The aim of this research was to improve mathematical written communication and mathematical disposition of students by using think-talk-write (TTW) learning strategy in tenth grade IPS 4 students at SMAN 50 Jakarta 2017/2018 academic year. The design of this study was a classroom action research. The subject of this research consists of 6 students, 2 students with low written communication skills with moderate disposition skills, 2 students having medium-skilled and medium disposition ability and 2 students who have high disposition ability with medium and high disposition ability. The data collection techniques were consist of 1) Giving mathematics written communication ability test, 2) Spreading mathematic disposition questionnaire, 3) Doing filed notes, 4) Interviewing with the research subjects. The result was based on the end of the third cycle, it was obtained all subject experienced has increase in mathematical written communication ability and 4 out of 6 subjects experien...
ITB journal of Sciences, 2011
This paper presents a method of constructing a continuous surface or a (real-valued) function of ... more This paper presents a method of constructing a continuous surface or a (real-valued) function of two variables z = u(x, y) defined on the square S := [0, 1] 2 , which minimizes an energy integral of fractional order, subject to the condition u(0, y) = u(1, y) = u(x, 0) = u(x, 1) = 0 and u(x i , y j ) = c ij , where 0 < x 1 < · · · < x M < 1, 0 < y 1 < · · · < y N < 1, and c ij ∈ R are given. The function is expressed as a double Fourier sine series, and an iterative procedure to obtain the function will be presented.
In this paper we will discuss about an interpolation problem of a set of data on an 2 1 m m grid ... more In this paper we will discuss about an interpolation problem of a set of data on an 2 1 m m grid on 2 1 A A . We will use tensor product of two Chebyshev systems on 1 A and 2 A as the space of interpolants. The procedure will be explained and some examples will be presented.
JPI (Jurnal Pendidikan Indonesia), 2019
The aim of this research was to improve mathematical written communication and mathematical dispo... more The aim of this research was to improve mathematical written communication and mathematical disposition of students by using think-talk-write (TTW) learning strategy in tenth grade IPS 4 students at SMAN 50 Jakarta 2017/2018 academic year. The design of this study was a classroom action research. The subject of this research consists of 6 students, 2 students with low written communication skills with moderate disposition skills, 2 students having medium-skilled and medium disposition ability and 2 students who have high disposition ability with medium and high disposition ability. The data collection techniques were consist of 1) Giving mathematics written communication ability test, 2) Spreading mathematic disposition questionnaire, 3) Doing filed notes, 4) Interviewing with the research subjects. The result was based on the end of the third cycle, it was obtained all subject experienced has increase in mathematical written communication ability and 4 out of 6 subjects experien...
ITB journal of Sciences, 2011
This paper presents a method of constructing a continuous surface or a (real-valued) function of ... more This paper presents a method of constructing a continuous surface or a (real-valued) function of two variables z = u(x, y) defined on the square S := [0, 1] 2 , which minimizes an energy integral of fractional order, subject to the condition u(0, y) = u(1, y) = u(x, 0) = u(x, 1) = 0 and u(x i , y j ) = c ij , where 0 < x 1 < · · · < x M < 1, 0 < y 1 < · · · < y N < 1, and c ij ∈ R are given. The function is expressed as a double Fourier sine series, and an iterative procedure to obtain the function will be presented.
In this paper we will discuss about an interpolation problem of a set of data on an 2 1 m m grid ... more In this paper we will discuss about an interpolation problem of a set of data on an 2 1 m m grid on 2 1 A A . We will use tensor product of two Chebyshev systems on 1 A and 2 A as the space of interpolants. The procedure will be explained and some examples will be presented.