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All Journal Buletin Udayana Mengabdi Jurnal Fisika FLUX Kappa Journal BULETIN FISIKA
Wayan Gede Suharta
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Analisis Pigmen Alami Daun Mangga (Mangifera Indicalinn) Sebagai Pewarna Batik Dengan UV-VIS Ni Komang Tribuana Cipta Putri; I Gst Agung Ayu Ratnawati; Wayan Gede Suharta
Kappa Journal Vol 3 No 2 (2019): Desember
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v3i2.1627

Abstract

The development of the batik industry has caused batik consumption to increase. Increased clothing and lifestyle needs trigger the need for practical (synthetic) dyes to have an impact on the waste produced. To reduce negative effects, the use of natural dyes needs to be increased. One of the plants that produce natural dyes is mango (Mangifera Indica Linn). Mango plants (Mangifera Indica Linn) including the family Anacardiaceae. The leaves contain a lot of chlorophyll which can produce color pigments for textiles. To find out the potential, an UV-VIS analysis was carried out, namely absorbance and calculation of the amount of chlorophyll contained in the leaves. The method used is the maceration process with technical ethanol solvents, with variations in concentration (70% and 96%) and variations in the immersion time (3 hours, 5 hours, 10 hours, 20 hours). From the results of UV-VIS spectrophotometry analysis showed the maximum absorption or absorbance at a concentration of 96% for 5 hours and the calculation of chlorophyll by the Lichtenthaler & Welburn (1983) method showed that the sweet arum manggu leaves used for research contained more chlorophyll b than chlorophyll a, gives a greenish-yellow pigment with wavelengths of 540 nm and 640 nm.
PEMANFAATAN KOTORAN SAPI SEBAGAI BAHAN BIOGAS SKALA RUMAH TANGGA ANGGOTA SUBAK BANYUMATI DESA UMA ANYAR SERIRIT BULELENG P. Suardana; M. Sumadiyasa; W. G. Suharta; A. A. Ngr. Gunawan; K. N. Suarbawa
Buletin Udayana Mengabdi Vol 16 No 1 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (232.832 KB)

Abstract

Telah dilakukan sosialisasi kepada anggota masyarakat Subak Banyumati Desa Uma Anyar mengenai dampak yang diakibatkan oleh polusi gas metana yang dihasilkan dari kotoran sapi dan telah melakukan usaha pemberdayaan anggota masyarakat Subak Banyumati untuk mengembangkan sistim pertanian terintegrasi antara pertanian, peternakan, dan pemanfaatan teknologi untuk meningkatkan nilai tambah kotoran sapi melalui pelatihan “Pemanfaatan Kotoran Sapi Sebagai Bahan Biogas Skala Rumah Tangga”. Dengan terlaksananya program pengabdian masyarakat ini anggota masyarakat Subak Banyumati mampu membuat instalasi biogas skala rumah tangga hingga menghasilkan gas metana dan mengoprasikannya untuk memasak. Dengan demikian masyarakat Desa Ume Anyar pada umumnya dan anggota masyrakat Subak Banyumati pada khususnya mampu memanfaatkan kotoran sapi sebagai bahan biogas dan mampu membuat pupuk kompos dalam waktu yang lebih cepat dari sebelumnya, serta yang tidak kalah pentingnya adalah masyarakat berkontribusi mengurangi polusi udara oleh gas metana.
Uji Kandungan Limbah Tahu Menggunakan Spektroskopi Fourier Transform Infrared Dan Laser-Induced Breakdown Spectroscopy Di Tukad Buaji Kelurahan Sesetan Denpasar Selatan Novita Susanti Elsi; I Gusti Agung Ayu Ratnawati; Wayan Gede Suharta; Ketut Putra; Anak Agung Ngurah Gunawan; I Nengah Sandi
Kappa Journal Vol 9 No 1 (2025): April
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v9i1.28604

Abstract

Telah dilakukan penelitian dengan judul uji kandungan limbah tahu menggunakan spektroskopi Fourier Transform Infrared dan Laser Induced Breakdown Spectroscopy di Tukad Buaji Kelurahan Sesetan Denpasar Selatan. Limbah yang dihasilkan pada proses produksi tahu pada umumnya dibagi menjadi dua bentuk limbah, diantaranya adalah limbah padat dan limbah cair. Jenis limbah tahu yang di uji pada penelitian ini adalah limbah cair, hal ini disebabkan karena limbah cair tahu banyak menghasilkan permasalahan terhadap lingkungan yang dilaluinya terutama aliran air sungai. Penelitian ini bertujuan untuk mengetahui kadar dari BOD, COD, pH, mengindentifikasi gugus fungsi serta mengetahui unsur apa yang terkandung di dalam limbah cair tahu. Metode pengujiannya dilakukan dengan menggunakan metode titrimetri, spektroskopi FTIR dan LIBS. Berdasarkan hasil pengujian dengan metode titrimetri pada limbah tahu adalah diperoleh perhitungan rata-rata dan standar deviasi untuk kadar BOD sebesar 13,306 7,886 mg/L (hasil ini masih dibawah standar baku mutu), kadar COD sebesar 28,416 12,908 mg/L (hasil ini masih dibawah standar baku mutu) dan pH sebesar 7,55 0,02 (hasil dalam kisaran baku mutu). Hasil pengujian dengan FTIR menunjukkan adanya gugus fungsi O-H, O=C=O, C=O dan C-H pada limbah tahu, sedangkan hasil uji yang diperoleh dengan menggunakan LIBS adalah terdapat unsur Ca, Na, K, W, Cd dan Cu yang terkandung di dalam limbah tahu.
Pengaruh Variasi Suhu Sintering Terhadap Struktur Kristalin Hidroksiapatit Tulang Iga Sapi Murzid, Jihan Qothrunada; Suharta, Wayan Gede; Spardi, I Wayan; Suardana, Putu; Kasmawan, I Gde Antha; Artawan, I Nengah; Prajitno, Djoko Hadi
Kappa Journal Vol 7 No 2 (2023): Agustus
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v7i2.20840

Abstract

A study entitled " The Effect of Sintering Temperature Variations on the Crystalline Structure of Bovine Bone Hydroxyapatite" has been carried out. The aim of this research is to understand how the sintering temperature influences the hydroxyapatite lattice parameters and to understand how the sintering temperature influences the volume and density of hydroxyapatite. The synthesis process begins with a calcination at 300 °C for one hour, followed by a sintering process with varying temperatures, namely 600 °C, 700 °C and 800 °C for samples A, B and C, respectively. To determine the hydroxyapatite content in the samples, then characterization using XRD was carried out. XRD results analysis was carried out using match3 and Rietica software. Identification results using match3 software obtained the presence of hydroxyapatite compounds and impurity compounds in the form of (Calcium trimagnesium carbonate huntite, Fluorine, Magnesium Hydrogensulfate Hydrate, Sassolite, Zemannite). The volume fraction of hydroxyapatite obtained in this study ranged from 68.6 – 82.8%. The higher the sintering temperature, the greater the volume fraction of hydroxyapatite. The Refinement results show that the higher the sintering temperature, the smaller the value of the lattice parameters in the direction of the a and c axes. Variations in sintering temperature also affect the resulting unit cell volume and density. The higher the sintering temperature, the smaller the unit cell volume, conversely the greater the unit cell density value.
Identifikasi Air Tanah Dengan Metode Geolistrik Konfigurasi Wenner Di Daerah Perumahan Pesraman Unud Bukit Jimbaran Bali Ratu, Trivena Sesilia; Wendri, Nyoman; Nurmalasari, Ni Putu Yuni; Putra, I Ketut; Suharta, I Wayan Gede; Baskoro, Winardi Tjahyo
Kappa Journal Vol 7 No 3 (2023): Desember
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v7i3.20928

Abstract

Identification of groundwater using the geoelectric method in the housing area of the Udayana University boarding house, Bukit Jimbaran, Bali. Data acquisition was carried out using the Wenner configuration to determine the location of the aquifer depth with rock resistivity values. This measurement parameter is the resistivity value of the rock which is then processed using the Res2dinv software for data mapping. After that, aquifer interpretation and geoelectric data interpretation is carried out. The results showed that the aquifer in the residential area of the Bukit Jimbaran Bali Udayana University boarding house is located at a relatively shallow depth of 1.25-12.4 meters below the ground surface. On tracks 1 and 2 have 3 groups of resistivity values. The resistivity value of 2.16–37.5 Ωm with a depth of 1.25-12.4 meters is suspected as a type of tufa lithology. The resistivity value of 72.8–226 Ωm with a depth of 1.25-12.4 meters is suspected to be limestone associated with tuff. The resistivity value of 423–1363 Ωm with a depth of 1.25-12.4 meters is suspected to be limestone.
Solution of Time-Independent Schrodinger Equation (TISE) by Using Finite Difference Approach Widagda, I Gusti Agung; Artawan, Nengah; Kasmawan, I Gde Antha; Suharta, I Wayan Gede; Nurmalasari, Ni Putu Yuni
BULETIN FISIKA Vol. 26 No. 1 (2025): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/BF.2025.v26.i01.p02

Abstract

This research investigates the numeric solution of the time-independent Schrödinger equation for the quantum harmonic oscillator by finite difference approach. The harmonic oscillator, described by a quadratic function potential, is a fundamental model in quantum mechanics due to its broad applications, ranging from molecular vibrations to quantum field theory. The time-independent Schrödinger equation is a second-order differential equation that typically poses challenges when solved analytically for complex potentials. The finite difference method become an attractive choice as it transforms the continuous differential equation into a system of linear equations that can be computationally solved through computer programming code. In this study, the spatial domain is discretized, and the second derivative is calculated by using central differences, transforming the TISE into a tridiagonal matrix representing Hamiltonian of system. By finding solutions to this matrix eigenvalue problem, wavefunctions and eigenvalues are obtained. The study results demonstrate that the finite difference approach effectively solves the TISE for the harmonic oscillator. The results obtained by using the finite difference method closely approximate the analytical results. The linear regression results show respectively that the gradient (β1), regression coefficient (β0) and coefficient of determination (R²) approach ideal values of 1, 0, and 1. The z-test results also show that the value of calculated z < critical z, indicating that the wavefunction and probability density, whether estimated by using finite difference approach or analytical methods, are equivalent with confidence level of 95 percent.
Penyelesaian Persamaan Schrodinger Tidak Bergantung Waktu Dengan Metode Finite Difference I Gusti Agung Widagda; I Nengah Artawan; Wayan Gede Suharta; I Gde Antha Kasmawan
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 21, No 3 (2024): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v21i3.19289

Abstract

The solution of time-independent Schrodinger equation (TISE) has been studied by several researchers. In this research, a TISE solution is found by using the finite difference method which is implemented in computer program code by using the Python language. TISE in the form of a second order differential equation is solved by using the finite difference method. In order to normalize the resulting wave function it is necessary to divide it by square root of the integral of the squared wave function. The integral method used is the Riemann method. In order to prove quantitatively that the TISE solution of the finite difference method is the same as or close to that of the analytical method, it is carried out by using linear regression and the z test. The research results show that the linear regression results from the two methods are nearly close. This is able to be seen from the values of  gradient (m), intercept (c) and coefficient of determination (R2) which are close to ideal values, namely, 1, 0 and 1, respectively. In addition, from the z test it is concluded that the null hypothesis H0 is accepted, which means the solution of finite difference method is equal to analytical solution by a confidence level of 95 percent.
Co-Authors A. A. Ngr. Gunawan A.A. Made Wisnu Wijaya Putra Aji Priyo Utomo Anak Agung Ngurah Gunawan Artawan, I Nengah Artawan, Nengah Baskoro, Winardi Tjahyo Djoko Hadi Prajitno Hery Suyanto I G. A. Widagda I G. Cahya Pradhana I Gde Antha Kasmawan I Gede Astina I Gusti Agung Ayu Ratnawati I Gusti Agung Ayu Ratnawati I Ketut putra, I Ketut I Nengah Artawan I Nengah Sandi Jeris Habfrons Wiatri Djereng K. N. Suarbawa Ketut Putra Laura Laudensia Senly Jalut Made Sumadiyasa Murzid, Jihan Qothrunada Ni Komang Tribuana Cipta Putri Ni Luh Putu Trisnawati Novita Susanti Elsi Nurmalasari, Ni Putu Yuni Nyoman Wendri P. Suardana Ratu, Trivena Sesilia Selvi Marcellia Spardi, I Wayan Widagda, I Gusti Agung Windaryoto Windaryoto