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Sumardi Yosaphat
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Astronomy Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Mathematics Physics

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THE EFFECTIVENESS OF PROBLEM BASED LEARNING MODEL TO INCREASE PHYSICS COGNITIVE AND PSYCHOMOTOR ACHIEVEMENTS THROUGH LABORATORY ACTIVITY IN HOOKE LAW LESSON Sri Wahyuningsih Leli; Sumardi Yosaphat
Jurnal Pendidikan Fisika Vol 5, No 2 (2016): Jurnal Pendidikan Fisika
Publisher : Universitas negeri Yogyakarta

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This research was performed with the two purposes below. (1) Discover if there was difference in increasing cognitive and psychomotor achievements between students who were taught by using problem based learning (PBL) through experiment and students who were taught by using direct instruction model with experiment method. (2) Discover the effectiveness of problem based learning model to increase cognitive and psychomotor achievements through experiment activity in Hooke Law lesson.The method of this research was quasi experiment by using pretest-posttest control group design. This research was conducted in SMA Negeri 5 Yogyakarta. The populations of this research are the students of science 11th grade of SMA Negeri 5 Yogyakarta which consist of 6 classes. Sampling technique used cluster random sampling. The classes used in this experiment were 11th science 1 and 11th science 3. The instruments of this research were lesson plan, student worksheet, test of cognitive achievement which consist of two types, i.e. essay test and psychomotor observation sheet in form of rating scale. The data analysis method to test the hypothesis is MANOVA test. The results of this research show the two conclusions below. (1) There was difference in increasing cognitive and psychomotor achievements between students who were taught Hooke Law by using PBL model through experiment activity and the students who were taught by using direct instruction model through experiment method. (2) PBL model through experiment activity was more effective to increase cognitive and psychomotor achievements then direct instruction learning model and experiment method.Key words: PBL model, direct instruction, experiment method, cognitive and psychomotor achievements.
IDENTIFICATION OF UNDERGROUND STRUCTURE OF OPAK FAULT LINE IN PATEN SUBVILLAGE WITH GEOELECTRIC METHOD USING DIPOLE-DIPOLE CONFIGURATION nabiada maria widyati lisia rini; wibowo Nugroho Budi; Sumardi Yosaphat
Jurnal Ilmu Fisika dan Terapannya (JIFTA) Vol 5, No 1 (2016): Jurnal Fisika
Publisher : Prodi Fisika, Departemen Pendidikan Fisika

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This research was aimed to determine the distribution of resistivity value and to identifyunderground structure of Opak fault line in Paten subvillage using geoelectric data. Research locationwas located in Paten subvillage, Srihardono village, Pundong subdistrict, Yogyakarta. It hasgeographical coordinates of 7o 56’34,2’’S to 7o56’54.94’’S and 110o21’38.44’’E to 110o21’58.22’’E. Themethod used was geoelectric method with dipole-dipole configuration based on resistivity value of rocks.Data acquisition used Naniura NRD 22 S resistivitymeter. The measurements were conducted for 3 lines.The results showed that the value of resistivity for first line is between 0,056 to 2000 Ωm, second linewas about 0,705 to 2700 Ωm, and for third line was about 2,16-1300 Ωm. Subsurface structure in Opakfault line in Paten is dominated by clay with resistivity value of 1-100 Ωm, limestone with resistivity valueof 500-10000 Ωm and alluvium with resistivity value of 1-20 Ωm .Keywords: geoelectric method, dipole-dipole configuration, Opak fault, Paten subvillage
MICROTREMOR CHARACTERISTICS ON THE SURFACE OF BRIBIN UNDERGROUND RIVER, GUNUNG SEWU KARST AREA, BASED ON SPECTRAL ANALYSIS, ANALYSIS OF HORIZONTAL TO VERTICAL SPECTRAL RATIO (HVSR) CURVE, AND TIME FREQUENCY ANALYSIS (TFA) NURHANAFI KHOLIS; wibowo Nugroho Budi; Sumardi Yosaphat
Jurnal Ilmu Fisika dan Terapannya (JIFTA) Vol 5, No 2 (2016): Jurnal Fisika
Publisher : Prodi Fisika, Departemen Pendidikan Fisika

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This research aimed to determine microtremor characteristics in the area pass by Bribin Underground River and around its surface.Microtremor measured on fiveteen points on Bribin Underground Research line using Digital Portable Seismograph tools. The result of measurement recorded by three waves component and analized by Fast Fourier Transform (FFT) algoritm, and Konno-Ohmachi smoothing. Then, data were analized with Horizontal to Vertical Spectral Ratio (HVSR) and Time Frequency Analysis (TFA).The results of this research were microtremor characteristics on the surface of Bribin Underground River was determined by frequency at Fourier spectral peak of microtremor signal, these values were 0,44-0,78 Hz for EW horizontal component, 0,29-0,78 Hz for NS horizontal component, and 0,43-0,78 Hz for vertical component. Frequency of HVSR curve peak was between 1,0-15,5 Hz. Based on microtremor TFA curve of vertical component, research area was classified into two zones, and there was no spesific value which show (berkembangnya) Bribin Underground River line at research area based on frequency characteristics of Fourier spectral peak each microtremor component. The area (yang dilalui) Bribin Underground River was at 5,5-15,5 Hz based on HVSR curve analysis, and most was at zone II due to microtremor TFA curve characteristics of vertical component. Keywords: Microtremor Characteristics, Bribin Underground River
Co-Authors Kholis Nurhanafi nabiada maria widyati lisia rini Sri Wahyuningsih Leli Wibowo Nugroho Budi