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ANALISIS PEMBELAJARAN MATEMATIKA PADA SEKOLAH YANG MENERAPKAN PENDEKATAN PMRI DAN SEKOLAH YANG TIDAK MENERAPKAN PENDEKATAN PMRI DI KOTA YOGYAKARTA Negara, Hasan S; Sujadi, Imam; Pangadi, Pangadi
Jurnal Pembelajaran Matematika Vol 1, No 7 (2013): Pembelajaran Matematika
Publisher : Jurnal Pembelajaran Matematika

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Abstract: The aims of this study were describing the process of mathematics learning and its problem solving for primary III students whom school was applying PMRI approach and non applying PMRI approach. This research was a qualitative case study type. The subject of this study divided into 2, which were: subject for searching information about learning process and subject for searching information about problem solving. Subject in this study were 2 primary teachers, 1 teacher from SD Kanisius Demangan Baru and 1 teacher from SD Muhammadiyah Demangan, another subject were 4 students, 2 students from SD Kanisius Demangan Baru and 2 students from SD Muhammadiyah Demangan. The data was divided into 2, which were learning process data that contain about teacher and student activities in learning and mathematical problem solving data that contain about information problem solving in mathematics. Learning process data was collected from recording transcription result of learning activities toward two observations, while mathematical problem solving data was collected by using the think aloud method. The result revealed that mathematical problem solving abilities in students with high ability type in school PMRI approach better than students in schools that do not implement PMRI approach, but problem solving abilities in students with low ability types in school PMRI approach is not better than students in schools that do not applying the PMRI approach.Key words: Learning process, problem solving, PMRI approac

PROSES BERPIKIR SISWA SMA DALAM PENYELESAIAN MASALAH APLIKASI TURUNAN FUNGSI DITINJAU DARI TIPE KEPRIBADIAN TIPOLOGI HIPPOCRATES-GALENUS Agustina, Rina; Sujadi, Imam; Pangadi, Pangadi
Jurnal Pembelajaran Matematika Vol 1, No 4 (2013): Pembelajaran Matematika
Publisher : Jurnal Pembelajaran Matematika

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Abstract:The aims of the research is to describe the thinking process at senior high school students in solving the application problems of the derivative function viewed from personality type choleric, sanguine, melancholies, and phlegmatic. The research was a descriptive qualitative. The subjects of the research was students of class XII Senior High School 1 Surakarta consist of one student for each personality types. The prosedure of selecting the subjects used purposive sampling. The data of the research was collected by using think aloud method. The validity of the data used was triangulation. Technique analyzing of the data were: (1) classifying the data into three categories: (a) understanding the information, (b) solving the problems, (c) convincing the answer, and then reducing the data, (2) presenting the data, and (3) concluding the data in each categories. The results of the research showed that thinking process for, (1) choleric student: (a) reading and creating an image, understanding information and question, (b) devising solution, connecting the first equation with the planned solution, solving the problem and only using one way solution, (c) substituting the answers into the first equation and determining maximum value of the function, (2) sanguine student: (a) reading and looking, then creating an image, understanding information although having difficulties and understanding question, (b) devising solution, connecting the first equation with the planned solution, solving the problem although having difficulties and using the other solution, (c) substituting the answers into the first equation and adjusting the answers with the problem in question, (3) melancholies student: (a) reading repeatedly, then creating an image, understanding information although having difficulties and understanding question, (b) devising solution, connecting the first equation with the planned solution although having difficulties, solving the problem and using the other solution (c) determining maximum value of the function, (4) phlegmatic student: (a) looking and then creating an image, understanding information and question, (b) devising solution, connecting the first equation with the planned solution although having difficulties, solving the problem and only using one way solution, (c) looking back at the anwers and adjusting with the actual event.Keywords: thinking process, problem solving, personality type Typology Hippocrates-Galenus

MAMPUAN KOMUNIKASI MATEMATIS DALAM PEMECAHAN MASALAH MATEMATIKA SESUAI DENGAN GAYA KOGNITIF PADA SISWA KELAS IX SMP NEGERI 1 SURAKARTA TAHUN PELAJARAN 2012/2013 Pratiwi, Dona Dinda; Sujadi, Imam; Pangadi, Pangadi
Jurnal Pembelajaran Matematika Vol 1, No 5 (2013): Pembelajaran Matematika
Publisher : Jurnal Pembelajaran Matematika

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Abstract: The purpose of this research was describing the ability of mathematical communication in solving the mathematics problem. This research was include of study case situation analysis research. The subjects of this research consisted of four students of Class IXb of the ninth grade SMPN 1 Surakarta in the second semester of the academic year 2012/2013.Â They were two students who had field dependence cognitive style and two students who had field independence cognitive style. The subjects were taken by using the purposive sampling technique. The data of this research were gathered through think aloud method. The data were then analyzed by using the technique with the procedureas follows: (1) the data were classified on the basis of the indicators of mathematical communication after the data had been obtained from the first and the second collections; (2) the data were presented in table form; and (3) the conclusions were drawn. The validity of the data was conducted by using time triangulation. The result of this research were analyzed by using constant comparison in which subject in i (i= 1, 2) with the j (j= 1, 2) cognitive style which was already valid as well compared with subject in k (k= 1, 2) with the the j (j= 1, 2) cognitive style which was already valid as well. The equal ability of mathematical communication was made the main finding wheares the different ability of mathematical communication was made the other finding. The result of this research valid because of the dependability proved. The ability of mathematical communication of the students with the field dependence cognitive style is different from that of those with the field independence cognitive style. The students with the field dependence cognitive style can communicate the ideas in written way well but they have difficulties in communicating ideas in spoken way as well as inclination to receive information without reorganizing it in such a way that the problem-solving ideas presented cannot reveal the actual problem solution. Meanwhile, the students with the field independence cognitive style can communicate the ideas well in both spoken and written ways and process as well as reorganize information in such a way that the problem-solving ideas presented can reveal the actual problem solution. Keywords: Mathematical Communication. Problem Solving. Cognitive Style.

POLA INTERAKSI GURU DAN SISWA TUNANETRA DALAM PEMBELAJARAN MATEMATIKA DI SMPLB A YKAB SURAKARTA (Studi Kasus Pada Siswa Kelas IX SMPLB A YKAB Surakarta Semester Ganjil Tahun Pelajaran 2012/2013) Khoiriyah, Siti; Sujadi, Imam; Pangadi, Pangadi
Jurnal Pembelajaran Matematika Vol 1, No 3 (2013): Pembelajaran Matematika
Publisher : Jurnal Pembelajaran Matematika

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with visual impairment in mathematics teaching learning on a conceptual and procedural knowledge in class IX SMPLB A YKAB Surakarta. This research was a qualitative case study, investigating deeply about the interaction of the teacher and the students in order that the interaction pattern can be described in the mathematics teaching learning. The subjects of this research were a mathematics teacher and all students of class IX SMPLB A YKAB Surakarta. The data in this study were in the form of teacher and students interactions obtained from transcriptions of the teaching learning recordings during twice observations. The transcription results were the teacher and the studentsâ conversations that are further reduced in order to obtain certain conversation related to the teaching learning of conceptual and procedural knowledge. Furthermore, labeling speech act and speech interaction was conducted in the conversation of conceptual and procedural teaching learning. Based on the labeling, speech interaction were categorized into three, namely: 1) speech interaction that was begun with speech act of giving information (BIn), 2) speech interaction that was begun with speech act of performing information (UIn), and 3) speech interaction that was begun with speech act of stimulating information (TIn). Each of the categories was analyzed so that the subjects that are interacting can be examined. The result of the analysis became the data of teacher and students interaction. The technique used to validate the data was time triangulation done by matching the data of the teacher and the studentsâ interaction taken from the first observation and the data of the teacher and the studentsâ interaction taken from the second observation.The results of the matching process were used to describe the interaction pattern. The findings of this research were: 1) the interaction pattern of the teacher and the students with visual impairment in mathematics teaching learning on a conceptual knowledge in class IX SMPLB A YKAB Surakarta was a two-way interaction pattern with inter-students interactions.Two-way interactionwith studentteachersis dominatedby theactivities ofthe teacherto giving information (BIN) and the performing information (TIN) to the students. While theinteractionbetween studentsis dominatedbythe activities ofthe studentsto performanceinformation(UIN). 2) the interaction pattern of the teacher and the students with visual impairment in mathematics teaching learning on a procedural knowledge in class IX SMPLB A YKAB Surakarta was a multiple-way interaction pattern (optimal result). Teacherinteractionwith studentsis dominatedby theactivities ofthe teacherto giving information(BIN), andstimulating information(TIN) to the students. Whilestudent interactionwith studentsspreadis dominated bythe performanceof information(UIN).Keywords:interactionpattern, conceptual knowledge, procedural knowledge, mathematics teachinglearning, students with visual impairment

MAMPUAN KOMUNIKASI MATEMATIS DALAM PEMECAHAN MASALAH MATEMATIKA SESUAI DENGAN GAYA KOGNITIF PADA SISWA KELAS IX SMP NEGERI 1 SURAKARTA TAHUN PELAJARAN 2012/2013 Pratiwi, Dona Dinda; Sujadi, Imam; Pangadi, Pangadi
Jurnal Pembelajaran Matematika Vol 1, No 5 (2013): Pembelajaran Matematika
Publisher : Jurnal Pembelajaran Matematika

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Abstract: The purpose of this research was describing the ability of mathematical communication in solving the mathematics problem. This research was include of study case situation analysis research. The subjects of this research consisted of four students of Class IXb of the ninth grade SMPN 1 Surakarta in the second semester of the academic year 2012/2013. They were two students who had field dependence cognitive style and two students who had field independence cognitive style. The subjects were taken by using the purposive sampling technique. The data of this research were gathered through think aloud method. The data were then analyzed by using the technique with the procedureas follows: (1) the data were classified on the basis of the indicators of mathematical communication after the data had been obtained from the first and the second collections; (2) the data were presented in table form; and (3) the conclusions were drawn. The validity of the data was conducted by using time triangulation. The result of this research were analyzed by using constant comparison in which subject in i (i= 1, 2) with the j (j= 1, 2) cognitive style which was already valid as well compared with subject in k (k= 1, 2) with the the j (j= 1, 2) cognitive style which was already valid as well. The equal ability of mathematical communication was made the main finding wheares the different ability of mathematical communication was made the other finding. The result of this research valid because of the dependability proved. The ability of mathematical communication of the students with the field dependence cognitive style is different from that of those with the field independence cognitive style. The students with the field dependence cognitive style can communicate the ideas in written way well but they have difficulties in communicating ideas in spoken way as well as inclination to receive information without reorganizing it in such a way that the problem-solving ideas presented cannot reveal the actual problem solution. Meanwhile, the students with the field independence cognitive style can communicate the ideas well in both spoken and written ways and process as well as reorganize information in such a way that the problem-solving ideas presented can reveal the actual problem solution. Keywords: Mathematical Communication. Problem Solving. Cognitive Style.

PERAMALAN PENGGUNAAN BEBAN LISTRIK JANGKA PENDEK GARDU INDUK BAWEN DENGAN DSARIMA Saptyani, Marita; Sulandari, Winita; Pangadi, Pangadi
MEDIA STATISTIKA Vol 8, No 1 (2015): Media Statistika
Publisher : Department of Statistics, Faculty of Science and Mathematics, Universitas Diponegoro

Bawen substation is a part of electrical distribution system. Forecasting load demand is required for power planning. Data used in this research are an hourly load demand of Bawen, Salatiga for 3 months, from February 2, 2013 to April 29, 2013, measured in Megawatt (MW).A half hourly load demand forecasting is needed for real time controlling and short-term maintenance schedulling. Since the data have two seasonal periods, i.e. daily and weekly seasonality with length 48 and 336 respectively, the model of double seasonal ARIMA (DSARIMA) is proposed as the most appropriate model for the case. Initial model is determined by the pattern of the data, based on the autocorrelation function plot. Some experiments was done by choosing several periods data. The most suitable model is chosen based on the outsample mean absolute percentage error (MAPE). The current study shows that the DSARIMA (0, 1, [1, 20, 47])(0, 1, 1)48(0, 1, 0)336 is the best model to forecastÂ 336 next period.Â Keywords: DSARIMA, MAPE, Electricity, Bawen

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