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Sainstek : Jurnal Sains dan Teknologi
Published by Institut Agama Islam Negeri Batusangkar
ISSN : 20858019     EISSN : 2580278X     DOI : http://dx.doi.org/10.31958/js
Core Subject : Science, Education,
Computer Science & IT Other
Arjuna Subject : Umum - Umum
Articles 12 Documents
 1   2 
Search results for , issue "Vol 3, No 1 (2011)" : 12 Documents clear
DETEKSI STASIONERITAS DATA RUNTUN WAKTU MELALUI UJI AKAR-AKAR UNIT Rusdi, Rusdi
Sainstek : Jurnal Sains dan Teknologi Vol 3, No 1 (2011)
Publisher : IAIN Batusangkar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (33.276 KB) | DOI: 10.31958/js.v3i1.37

Abstract

even though there is no meaningful relationship between the two variables. Sometime we expect no relationship between the two variables, yet a regression of one on the other variable often shows a significant relationship. This situation exemplifies the problem of spurious regression. Spurious regression problem may arise from regressing a nonstationary time series variable on one or more nonstationary time series variable(s). Therefore, it considers important to be able to determine whether a time series data is stationary or not. A time series data is called stationary if it does not contain any unit roots. A test of stationary (or nonstationary) has become widely popular since the last two decades is the unit root test. This paper is meant to explain how to use unit root test in time series model especially for an autoregressive time series model.Key words: autoregressive time series, stationary, unit root
RESONANSI PADA RANGKAIAN RLC LIZELWATI, NOVIA
Sainstek : Jurnal Sains dan Teknologi Vol 3, No 1 (2011)
Publisher : IAIN Batusangkar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (544.985 KB) | DOI: 10.31958/js.v3i1.40

Abstract

In an ac circuit containing inductance L, resistance R, and capacitance C, when Xc=XL , the applied voltage V and the current I are in phase, this effect is called resonance. To RLC series ac circuit resonant frequency is got when the value of electric current maximum and minimum to RLC parallel ac circuit. The result an exsperiment, in RLC series ac circuit by using R = 99,5 ohm and R= 32,136 ohm have frequence resonance 1800 Hz, and 1950 Hz for R = 9,185 ohm.Whereas in RLC parallel ac circuit with R = 99,5 ohm have frequence resonance 2000 Hz, and have range 1800 ? 1900 Hz to R= 32,136 ohm,if R = 9,185 ohm frequence resonance 1800 Hz. The value frequence resonance by using formula on theory is 1808,53 Hz. So can get conslusion that the difference of value frequence resonance in exsperiment not significant with theory.Key words: eksperiment of phisic, RLC series ac circuit, RLC parallel ac circuit, resonant frequency

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