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Journal of Natural Sciences and Mathematics Research Published by Faculty of Science and Technology Universitas Islam Negeri Walisongo Semarang Jl Prof. Dr. Hamka Kampus III Ngaliyan Semarang 50185 Website: https://journal.walisongo.ac.id/index.php/JNSMR Email:jnsmr@walisongo.ac.id
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Journal of Natural Sciences and Mathematics Research
Published by Universitas Islam Negeri Walisongo Semarang
ISSN : 26146487     EISSN : 24604453     DOI : https://doi.org/10.21580/jnsmr
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Materials Science & Nanotechnology Physics
Journal of Natural Sciences and Mathematics Research, an international journal, provides a forum for publishing the original research articles, review articles from contributors, and the novel technology news related to natural sciences and mathematics research. Scientific articles dealing with fundamental sciences, material sciences, mathematics, materials characterization, etc. are particularly welcome. The journal encompasses research articles, original research report, reviews, short communications and scientific commentaries in fundamental sciences and mathematics including: fundamental sciences, fundamental physics, fundamental chemistry, fundamental biology, mathematics, applied sciences, applied physics, applied chemistry,applied biology,applied mathematics and materials characterization.
Arjuna Subject : Umum - Umum
Articles 159 Documents
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Analysis of Angklung Sound Intensity as a Acoustic Instrument Hartanti, Rizka Silviana; Astuti, Budi
Journal Of Natural Sciences And Mathematics Research Vol 2, No 1 (2016): Volume 2, Nomor 1, 2016
Publisher : Faculty of Science and Technology, State Islamic University Walisongo Central Java

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (707.54 KB) | DOI: 10.21580/jnsmr.2016.1.1.1646

Abstract

The purpose of this study was to analysis of angklung sound intensity. The research method is using angklung musician 2 octaves. Each consists of two tube tone that sounded from the tone of G to G , length and diameter of the tube every tone becomes independent variable, while intensity of the sound produced becomes dependent variable. Sound intensity is measured using a Sound Level Meter is placed with a constant distance. The result showed that G tone was a low tone which had a frequency of 49.5 Hz, first tube had 21.6 cm length and 4.1 cm diameter, second tube had 10.1 cm length and 3.4 cm diameter produced the sound intensity of 90.7 dB. G’ tone was a high tone which had a frequency of 99 Hz, first tube had 10 cm length and 3 cm diameter, second tube had 5.5 cm length and 2.1 cm diameter produced the sound intensity of 99.1 dB. It can be concluded that the higher the frequency, the greater the intensity of the sound produced. The shorter tube length and the smaller tube diameter, the greater the intensity of the sound. ©2016 JNSMR UIN Walisongo. All rights reserved.
Morphological Characteristics and Kinship Relationship of Mushroom Schizophyllum commune Fr. Kusrinah, Kusrinah; Kasiamdari, Rina Sri
Journal Of Natural Sciences And Mathematics Research Vol 1, No 2 (2015): Volume 1, Nomor 2, 2015
Publisher : Faculty of Science and Technology, State Islamic University Walisongo Central Java

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/jnsmr.2015.1.2.1620

Abstract

Schizophyllum commune is a mushroom from the division of Basidiomycota which abundance at rainy season on wood that have been moldered for its habitat. S. commune has been distributed widely at various types of wood habitat (jack fruit, bamboo, rubber, mango etc). Existence of this mushroom has not been known as well as any mushroom are able to be consumed/edible yet. In Java, the societies who have known it as consumption mushroom called it with local name jamur gigit. Jamur gigit is potential to become food material and based on organoleptic test indicates that jamur gigit is more delicious from oyster mushroom. The purpose of research is to investigate the morphology character of S. commune at various growth phases and to study the S. commune relationship in Java. The result of this research is expected can give information about morphology character of S. commune in each its growth phase and to understand S. commune relationship in Java. Sample for research has been collected in 3 areas in Java. The macroscopic morphology character and microscopic character of S. commune were observed. The character that had been obtained is used to compile description and be analyzed by cluster using SPSS 13.0 to study the kinship relationship. The result of research indicates that morphology character of S. commune in Java of fruit body when old and young phase was different, while the microscopic character almost same to the obtained sample. The result of analysis cluster indicated that at similar level of 38,1 % there were two clusters, first cluster was Sidoarjo a S. commune and S. commune Yogyakarta. The second cluster has member the Sidoarjo b S. commune, Malang S. commune, Tangerang S. commune, Semarang S. commune and Kuningan S. commune. © 2015 JNSMR UIN Walisongo. All rights reserved.
The Application of Music Therapy For Children with Autism Based On Facial Recognition Using Eigenface Method Yusufiyah, Hesti Khuzaimah Nurul; Usuman, Ilona; Putra, Agfianto Eko; Widodo, Triyogatama Wahyu
Journal Of Natural Sciences And Mathematics Research Vol 3, No 1 (2017): Volume 3, Nomor 1, 2017
Publisher : Faculty of Science and Technology, State Islamic University Walisongo Central Java

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (801.747 KB) | DOI: 10.21580/jnsmr.2017.3.1.1695

Abstract

This research is motivated by the condition of children with autism who require continuous monitoring without a parent accompany, and certain therapies who is capable to reduce repetitive behaviors and increase the concentration. Music therapy is one of the treatment which able to perform it. The implementation of this research is located in a special schools with autism, the perform is proper at certain times and requires tools for music therapy. Therefore, the integrated device was made to monitor the activities of children with autism, as well as providing music therapy automatic face recognition based on Eigenface method.This device perform when the children with autism under certain conditions (e.g. crying, the teacher would not work orders, etc.), then by capturing the the facial image, the system will process to compare the similarity with the existing database. Then, the shortest distance of euclidean is chosen. If the captured of facial image is similar to the one existing database, then the music is performed as music therapy for children with autism. The results of this system, indicates that the childs responses become more calm, easy concentration, and the repetitive attitude is reduced. While the accuracy of the system achieves by 80% (compare with the old and new database) and 20%. (without new database). ©2017 JNSMR UIN Walisongo. All rights reserved.
Classical Cryptography of Winds Eye Cell Circles Saputro, Razis Aji; Sokawati, Risti; Mudrikah, Mudrikah; Puspita, Nikken Prima
Journal Of Natural Sciences And Mathematics Research Vol 2, No 2 (2016): Volume 2, Nomor 2, 2016
Publisher : Faculty of Science and Technology, State Islamic University Walisongo Central Java

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1770.461 KB) | DOI: 10.21580/jnsmr.2016.1.2.1658

Abstract

This classic cryptographic algorithms was designed from the concept of cardinal directions and the S-box. circles Concept given 16 directions winds and 8 circles lined with each cells according to ASCII table. The process of encryption algorithm using two kinds of key symbol that are (k1) form 16 symbols of the wind, and (k2) is a 7-bit binary number. plaintext encryption process become chiperteks1 with forming angle against north wind and k1 roomates are from plaintext rotating accordance angle formed. Chipertext 1 to chipertext 2 using binary numbers divided become r1 as directions displacement away from the center circle and r2 move with rotating around the center circle. Spinning process followed directions clockwise circle if even if odd and vice versa. Decryption process is done by doing a backward on the algorithm by using the key k2 (r2 then r1) and then r1. Spins counter-encryption process. ©2016 JNSMR UIN Walisongo. All rights reserved.
Influence Analysis of Heating Time Towards Degradation of Anti Oxidant Activity on Water Spinach Leaves (Ipomoea Aquatica Forsk) Arsyad, Akhmad Baihaqi; Nirwana, Ratih Rizqi; Firmansyah, R. Arizal
Journal Of Natural Sciences And Mathematics Research Vol 2, No 1 (2016): Volume 2, Nomor 1, 2016
Publisher : Faculty of Science and Technology, State Islamic University Walisongo Central Java

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/jnsmr.2016.1.1.1640

Abstract

The purpose of this research is to analyze the impact of water spinach leaves heating (Ipomoea aquatica Forsk) at 100oC by different time duration on its antioxidant activity. The method was experimental method involved several steps, such as sample preparation, extraction process, and evaluation of antioxidant activity with UV-Visible Spectrophotometer. The result of this research shown that IC50 value from K1, K2, K3 to K4 were 25.25 μg/mL (very high), 96.75 μg/mL (high), 181.47μg/L (low, and 280μg/mL (very low). The IC50 value of K1 to K2 decreased 71.49 μg/L, The K2 to K3 decreased 84.72 μg/L, K3 to K4 decreased 98.53 μg/L. By this result, it was predicted that the antioxidant of water spinach will diminish, or even it will be lowered when it is steamed more than 15 minutes in 100 C. ©2016 JNSMR UIN Walisongo. All rights reserved.
Characteristics of Coconut Coir Composite Acoustic with Epoxy Matrix Amalia, Lia Solikhatul; Fadllan, Andi; Wahib, Abdul
Journal Of Natural Sciences And Mathematics Research Vol 1, No 2 (2015): Volume 1, Nomor 2, 2015
Publisher : Faculty of Science and Technology, State Islamic University Walisongo Central Java

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/jnsmr.2015.1.2.1593

Abstract

The aim of this research is to measure the absorption coefficient of composite material synthesized from coconut fiber as filler and epoxy matrix and to discover the alternative interval of sound reducer material from natural resources, i.e (coconut fiber : fine fiber, rough fiber and crude fiber). After pressing, the sample was then cutted and examined using Bruel and Kjaer characterization. From the characterization process, the absorption coefficient of composite with filler of fine, rough and crude coconut fiber is calculated and found to be 0.997, 0.97 and 0.96, respectively. © 2015 JNSMR UIN Walisongo. All rights reserved.
CHARACTERIZATION OF PROPERTIES OF PVDF/POLY(DIMETHYLSILOXANE) COMPOSITES SEPARATOR WITH BLENDING MEMBRANE METHOD Arifin, Devi Eka Septiyani
Journal Of Natural Sciences And Mathematics Research Vol 3, No 2 (2017): Volume 3, Nomor 2, 2017
Publisher : Faculty of Science and Technology, State Islamic University Walisongo Central Java

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/jnsmr.2017.3.2.1780

Abstract

The aims of this research to make poly(vinylidene fluoride) (PVDF) and poly(dimetilsiloksan) (PDMS) composites separator with blending membrane method. Synthesized of  PVDF/PDMS composites separator used various ratio were 10/0, 9/1, 8/2, and 7/3. The purpose of increasing concentration of PDMS/PVDF to improve the performance of the composites separator which includes a dimensions of porosity, a pore density, and a electrical conductivity. Based on crystallographic analysis using XRD, the increasing concentration number of PDMS to make compositess was influence decreasing of crystallinity until 29.26% in a ratio 7/3.The analysing of FTIR have sound the wavenumber of each phase can distinguish, which this material includes in the criteria of the composites. The result using XRD and FTIR to material PVDF/PDMS composites in all of the ratio constituens have shown the identification of the structure α-phase of PVDF. The increase of concentration number PDMS influenced decreasing of pore dimension and increasing of pore density with the small of pore dimension 1.71 µm and pore density 4.07x1011 count/m2 inthe ratio 7/3. In a ratio 7/3, the value of the electrical conductivity was 3.45x10-4S/cm and the resistance increased up to 80%.
Eigen Value of Fuzzy Matrices Suroto, Suroto; Wardayanti, Ari
Journal Of Natural Sciences And Mathematics Research Vol 3, No 2 (2017): Volume 3, Nomor 2, 2017
Publisher : Faculty of Science and Technology, State Islamic University Walisongo Central Java

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (824.755 KB) | DOI: 10.21580/jnsmr.2016.1.2.1669

Abstract

In this paper we discuss about eigen value of fuzzy matrices by adopted the substract operation of fuzzy matrices in Sidky and Emam (1992). By applying this substraction, it’s yields that some properties eigen value of fuzzy matrices in Joe Anand and Edal Anand is not satisfied.©2016 JNSMR UIN Walisongo. All rights reserved.
The Abundance Analysis of Mangrove Crab (Scylla spp.) in the Mangrove Area at Senik Hamlet, Bedono Village, Sayung Subdistrict, Demak District Adha, Miftahul; Mukhlisoh, Siti; Armanda, Dian Triastari
Journal Of Natural Sciences And Mathematics Research Vol 2, No 1 (2016): Volume 2, Nomor 1, 2016
Publisher : Faculty of Science and Technology, State Islamic University Walisongo Central Java

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (722.598 KB) | DOI: 10.21580/jnsmr.2016.1.1.1647

Abstract

The abration at Senik hamlet, Bedono village, Demak district has alternated the land became mangrove ecosystem’s area. This ecosystem supply the habitat such as group of mangrove crab (Scylla sp). The purpose of this research to analyze the abundance of mangrove crab at various location in the mangrove’s ecosystem at Senik’s hamlet. The mangrove crabs sampling are taken at three station in the Rejosari The result of variances analyzis prove there are the significant differences (Fhitung=17,67; α=0,05) in the abundance of mangrove crab among station. The most abundant of mangrove crab in the station III (815 ind/Ha), then Station II (563 ind/Ha), and Station I (341 ind/Ha), The Domination of mangrove crab in the three of station is Scylla tanquebarica species (female and the age is adolescent). The analyzis result of Pearson Products Moment at the environment parameter obtained that the water salinity (r=0,77) and the depth of water (r=0,72) to be the most powerfull positive correlation with the abundance of mangrove crab. The conclusion of this research is the height of the abundance of mangrove crab at Senik’s Hamlet supported by the combination of various environment factor, especially the salinity factor, the water depth, and the density of mangrove vegetation. ©2016 JNSMR UIN Walisongo. All rights reserved
The Study of Iron Metal (Fe) Content in Water Morning Glory Plants (Ipomoea Aquatica Forsk) using Atomic Absorption Spectrophotometry (AAS) Method Kholifah, Khusnul; Fadllan, Andi; Yuniarti, Wenty Dwi
Journal Of Natural Sciences And Mathematics Research Vol 1, No 2 (2015): Volume 1, Nomor 2, 2015
Publisher : Faculty of Science and Technology, State Islamic University Walisongo Central Java

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/jnsmr.2015.1.2.1621

Abstract

There are several hazardous material compounds in water morning glory that cannot be consumed. This study aimed to Fe content in water morning glory taken from different locations using Atomic Absorption Spectrophotometry (AAS) method. The data were acquired through documentation method, observational method and experimental method. All of the data were analysed by quantitative approach and descriptive analysis. The number of samples taken was 3 pieces of water morning glory per location. From the AAS method, the results showed that Fe concentrations in all samples varied. The average of Fe content in water taken from Industrial area was 0,258 ppm, from green house was 0 ppm, and from rural area was 0,175 ppm. The numbers of Fe content in water morning glory taken from industrial area were 10,78 ppm, 9,0 ppm, 9,3 ppm; from green house were 1,9 ppm, 4,4 ppm, 2,4 ppm; and from rural area were 6,4 ppm, 4,94 ppm, 4,98 ppm. The results of the study showed that Fe content in water or water morning glory taken from green house and rural area was below the threshold level of metal contamination, meanwhile in industrial area, the Fe content was almost approaching the threshold level of metal contamination. In the industrial area, the water morning glory could be used to reduce water pollution, not as food sources because of the high content of Fe. Meanwhile, in green house and rural area, water morning glory might be consumed by people because of the low content of Fe. © 2015 JNSMR UIN Walisongo. All rights reserved.

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