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Sainstek : Jurnal Sains dan Teknologi

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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 212 Documents

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PENGEMBANGAN SISTEM EKSPERIMEN VISKOSITAS BERBASIS PERSONAL KOMPUTER DAN MIKROKONTROLER MCS-51 Yohandri, Yohandri
Sainstek : Jurnal Sains dan Teknologi Vol 2, No 1 (2010)
Publisher : IAIN Batusangkar

In this work, viscosity experiment system based on personal computer and microcontroller MCS-51 has been developed. The new model of viscosity experiment system is purposed to perfom the time and viscosity calculation automatically on the personal computer. The graph and statical analysis are used to determine characteristics of LDR sensor and experiment system such as sensitivity, accuracy, and precision. There were four main results of this research as follow : 1). LDR sensor resistance decreased with increasing light intensity and sensitivity of sensor was -11,55.(I)-1,56, 2). The comparator output voltage are two condition depend on light intensity, below 400 lux the output voltage is 4.54 Volt and for above is 0.59 Volt, 3). The accuracy and precision average of system timer was high, each of it was 99.9% and 0.97, 4). Ability of system to determine the value of the liquids viscosity has been tested and obtained three results for glycerin, SAE40 Oil, and cooking oil which the value of each sequence are 1121.99 mPas, 795.08 mPas and 79.78 mPas. Based on repeated measurement in viscosity, the precision of system have been obtained which average 0.994. Key words: viscosity, personal computer, microcontroller, sensitivity, accuracy, precesion

STUDI MOLEKUL m2N2 DENGAN GRUP SIMETRI D~h DAN D2h MENGGUNAKAN METODE AB INITIO Rahmi, Elvy
Sainstek : Jurnal Sains dan Teknologi Vol 2, No 1 (2010)
Publisher : IAIN Batusangkar

The study on molecule m2N2 (m=H, Li, Na, Be, Mg, B, Al, C, Si, N, P, O, S, F, Cl) with symmetrical groups D~h and D2h had been conducted by using Ab Initio method. As a part of HyperChem pro 6.0, this program was operated with Pentium 4. The research involved a number of linear cyclic molecules m-N-N-m as well as m-N-m-N. As the result of the computation process, it was found that generally the cyclic molecules m2N2 were more stable than those of the other linear molecules signed with the smaller total energy. It was also found that the most stable linear molecules were NºN resulted from the optimalization of Cl-N-N-Cl with the total molecule energy: -637778.1251 kcal/mol. Meanwhile, the most stable cyclic molecules were S-N-S-N with the total molecule energy: -560789.9726 kcal/mol. Key words: cyclic molecule, ab initio

KEKONVERGENAN BARISAN INFINITESIMAL Afriyani, Dona
Sainstek : Jurnal Sains dan Teknologi Vol 2, No 1 (2010)
Publisher : IAIN Batusangkar

This article was to find descript methode theory with number of Sequences. Base on theory has found the relationships it, are if has a free infestimal sequences line each other, then number of intestimal konvergencies with distribution of free variable in a function at conditions. Key words: infestimal sequences, convergen, characteristic of function

DESAIN ALAT HITUNG KECEPATAN SUDUT BERBASIS SENSOR MAGNETIK FLUXGATE Yulkifli, Yulkifli; Anwar, Zul; Djamal, Mitra
Sainstek : Jurnal Sains dan Teknologi Vol 2, No 1 (2010)
Publisher : IAIN Batusangkar

This paper explains the design of angular velocity apparatus (Gyrometer) base on fluxgate sensor. The design of sensor elements consists of the double secondary coil (pick-up) and excitation coil with 10 layers, core layer is put into the isolative cavity. Fluxgate magnetic sensor works based on the principles of second harmonics, the intensity of magnetic fields proportional to the output sensor voltage. Based on data analysis on to sensor characterization it was obtained that the sensitivity 4.52 mV/?T, ±20 ?T in ranges. The maximum absolute error obtained from polynomial function approach in 0.53 ?T and the relative error is 1.3% on magnetic fields ~19 ?T. In this research the sensor can measure the frequency in the maximum absolute and relative error 0.68, 0.58, 0.17, 0.71 and 0.026%, 0.022%, 0.006%, 0.021%, whereas the disc magnet with the number of magnet 2, 4, 8 and 16 respectively.Key words: angular velocity, fluxgate sensor, coil, second harmonic

PROSES DECISION TREE PADA DATAMINING DENGAN ALQORITMA ID3 MUCHLIS, LITA SARI
Sainstek : Jurnal Sains dan Teknologi Vol 2, No 1 (2010)
Publisher : IAIN Batusangkar

This article was study about decision process data meaning with algoritma ID3. Data meaning is an atomatic extraction process of large data. It was found with a contour data. Data meaning have a function to produce a different contour wich other. The function of classification of data meaning is helping write decision tree, the function with algoritma ID3.Key words: data meaning, classification, decision tree

PREPARASI DYE SENSITIZED SOLAR CELL (DSSC) MENGGUNAKAN EKSTRAK ANTOSIANIN UBI JALAR UNGU (Ipomoea batatas L.) Damayanti, Retno; Hardeli, Hardeli; Sanjaya, Hary
Sainstek : Jurnal Sains dan Teknologi Vol 6, No 2 (2014)
Publisher : IAIN Batusangkar

This study aims to determine the effect of the concentration of semi-solid electrolyte/polymer gel and determine the effect of the dye absorption technique on TiO2 paste the resulting DSSC efficiency. The results obtained by XRD characterization of TiO2 crystal phase is anatase and rutile TiO2 with a crystal size of 30.27 nm. Based of testing the light absorption of dye extract of purple sweet potato is known that the spectrum of the dye can absorb light at 533 nm wavelength maximum. The result of the conversion of sunlight into electrical energy obtained the highest value is at the highest PEG concentration at 0.1 M is 0,38% for TiO2 paste is mixed directly with the dye and 0,23% for TiO2 paste soaking in the dye for 24 hours using an electrolyte semi-solid/gel polymer with an area of 1 cm2.Key words: anthocyanin, DSSC, semi-solid electrolyte, FTIR, UV-Vis, XRD

PREPARASI DYE SENSITIZED SOLAR CEL MENGGUNAKAN EKSTRAK ANTOSIANIN KULIT BUAH MANGGIS (Garcinia Mangostana L) Maulina, Anna; Hardeli, Hardeli; Bahrizal, Bahrizal
Sainstek : Jurnal Sains dan Teknologi Vol 6, No 2 (2014)
Publisher : IAIN Batusangkar

This study aims to determine the effect of the concentration of semi-solid electrolyte/polymer gel and determine the effect of the dye absorption technique on TiO2 paste the resulting DSSC efficiency. The results obtained by XRD characterization of TiO2 crystal phase is anatase and rutile TiO2 with a crystal size of 30.27 nm. Based of testing the light absorption of dye extract of purple sweet potato is known that the spectrum of the dye can absorb light at 533 nm wavelength maximum. The result of the conversion of sunlight into electrical energy obtained the highest value is at the highest PEG concentration at 0.1 M is 0,38% for TiO2 paste is mixed directly with the dye and 0,23% for TiO2 paste soaking in the dye for 24 hours using an electrolyte semi-solid/gel polymer with an area of 1 cm2.Key words: Anthocyanin, DSSC, semi-solid electrolyte, FTIR, UV-Vis, XRD

KAJIAN ANALISIS URIN BAYI PEREMPUAN DAN LAKI LAKI DENGAN COMPUTED RADIOGRAPHY MAIYENA, SRI
Sainstek : Jurnal Sains dan Teknologi Vol 6, No 2 (2014)
Publisher : IAIN Batusangkar

This study aimed to see whether there are differences in the profile line image and the linear attenuation coefficient in the urine baby boys and baby girls who drink only breast milk alone and additional milk with computed radiography, and relation to differences in impurity law. The study was conducted in the x-ray radiology Hospital National Stroke Bukittinggi. The study sample consisted of urine male and female babies who drink only breast milk and urine only baby girls and boys who drank ation and additional milk. CR image retrieval is performed three days (22, 25 and 26 September 2014) with a voltage variation of 50 and 60 kV and 100 mA using a strong current and exposure time of 5 ms. The image was analyzed visually, and physical image quality. The results showed that visual image acquisition of the third day and with two different voltage variations indicate that there are differences in the brightness, contrast and sharpness of the image. Analysis of image quality (based grafi line profile image) shows the pattern of the same line profile image on the third day of taking images at a voltage of 60 kV. Physical Analysis of the image showed that the urine samples tested had a pattern of linear attenuation coefficient value equal to the voltage of 60 kV on three different days. Linear attenuation coefficient values greatest U1 and U3 linear attenuation coefficient on the third day of the smallest image retrieval. The big difference in the value of the significant linear attenuation coefficient between U1 and U3 sample is related to differences in the urine purification unclean baby boys and baby girls.Key words: baby boy urine, urine baby girl, computed radiography, law unclean in Islam

POTENSI ANTIFERTILITAS EKSTRAK TEH HITAM PADA MENCIT (Mus musculus L.) JANTAN DELFITA, RINA
Sainstek : Jurnal Sains dan Teknologi Vol 6, No 2 (2014)
Publisher : IAIN Batusangkar

The effects of black tea extract on mice fertility was studied in twenty four (n=24) sexually matured male mice. Mices were randomly divide into four (4) groups of six (6) mices per group. The experimental groups ware treated as follows: Group I treated with no received treatment, Group II with 1,25 %, Group III with 2,5 %, and Group IV with 5 % black tea extract. The extract was orally administered 1 ml/100 g body weigh for 35 days. The epididymis weight, sperm count, motility, viability and normal sperm morphology changes were determined. The epididymis weight, sperm count, motility, viability and normal sperm were decreased. Treatment with highest dose 5 % of the extract resulted in a significant decreased when compared to the control. Result showed that black tea extract has potential for use as antifertility for animal in future.Key words: black tea extract, mice fertility

PENGARUH LATIHAN SUBMAKSIMAL TERHADAP KADAR INTERLEUKIN-6 PADA SISWA PUSAT PENDIDIKAN LATIHAN PELAJAR SUMATERA BARAT Yuniarti, Elsa
Sainstek : Jurnal Sains dan Teknologi Vol 6, No 2 (2014)
Publisher : IAIN Batusangkar

This study to determine the effect of submaximal exercise on muscle tissue and endothelial damage in athletes indicated by increased levels of IL-6 plasma in the students of The Education Center and Sport Training Student West Sumatera. This study was experimental pre and post-test group design to 17 students sport of football in PPLP West Sumatera. IL-6 before and after exercise submaximal examined was method by ELISA. Statical analysis was bypaired samples t-test and the results obtained statistically significant when p <0,05. The results showed the mean levels IL-6 before the submaximal exercise 4,2±2,8 pg/ml and 7,2±3,6 pg/ml after exercise. The increase levels of IL-6 statistically highly significant p<0,001.Key words : IL-6, submaximal exercise

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Home Page

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Editorial Address Fakultas Tarbiyah dan Ilmu Keguruan IAIN Batusangkar Jl. Sudirman No. 137 Kuburajo Lima Kaum Batusangkar, Sumatera Barat. 27213

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Contact Name
Marjoni Imamora

Contact Email
-

Phone
+6282169719397

Journal Mail Official
sainstek@iainbatusangkar.ac.id

Editorial Address
Fakultas Tarbiyah dan Ilmu Keguruan IAIN Batusangkar Jl. Sudirman No. 137 Kuburajo Lima Kaum Batusangkar, Sumatera Barat. 27213

Location
Kab. tanah datar,

Sumatera barat

INDONESIA