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All Journal Buletin Udayana Mengabdi Jurnal Biologi Udayana Bumi Lestari BULETIN FISIKA Jurnal Keselamatan Radiasi dan Lingkungan International Journal of Life Sciences (IJLS) International Journal of Physical Sciences and Engineering (IJPSE)

I Gde Antha Kasmawan

Department Of Physics, Faculty Of Mathematics And Natural Sciences, Udayana University, Indonesia

Author-ID : 598180

Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Physics Social Sciences Other

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PEMBUATAN PUPUK ORGANIK CAIR MENGGUNAKAN TEKNOLOGI KOMPOSTING SEDERHANA I.G.A. Kasmawan; G.N. Sutapa; I.M. Yuliara
Buletin Udayana Mengabdi Vol 17 No 1 (2018): Buletin Udayana Mengabdi
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Plants in growth and development require two types of nutrients, namely macro and micro nutrients.However, only N, P, and K elements are needed plants for larger amount. The purpose of this research is toprovide liquid organic fertilizer as balancing fertilizer considering the increasing price of fertilizer in themarket. Research on the use of simple composting technology in the manufacture of liquid organic fertilizeris done by involving participants from the elderly group, which is light and can be done alone. The composterused is a 25 L gallon with an outer connecting hose. The end of the hose is immersed in a bottle of water toensure the sustainability of the composting process in an anaerobic atmosphere. Production of liquid organicfertilizer using main ingredient in the form of foliage (5 kg) and livestock waste (1kg), with additivessuchshrimp paste (100 g) and brown sugar (200 g), and 200 mL EM4 as bioactivator. Five successful liquidorganic fertilizer products have the highest nitrogen (N), phosphorus (P), and potassium (K) content of0.16%, 153,75 mg/L and 663,98 mg/L, respectively.

Rancangan Alat Ukur Suhu dan Kelembaban Udara Menggunakan Mikrokontroler ATmega 328P Hadi Apriandi; Satriya Wibawa I Made; Antha Kasmawan I Gde
BULETIN FISIKA Vol 23 No 1 (2022): 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.2022.v23.i01.p02

It has been successfully made design of a digital temperature and humidity measuring instrument using ATmega 328P microcontroller. The results of temperature and humidity data are measured using the DHT22 sensor which receives data signals in the form of temperature and humidity. Design of the instrument is placed in the same place as the reference instrument, namely in the instrument shop, then the results of the design of the reference instrument and instrument are processed into graphical form and proven using linear regression equations. The measurement results are displayed on the LCD keypad shield. The results of the instrument design calibration carried out on the reference instrument have a fairly good level of accuracy, namely for air temperature of 99.99% and humidity of 98.34%. From the results of the calibration carried out, it shows that the design of the instrument made has good validity (accuracy and precision).

PENGARUH KONSENTRASI DAN ION VALENSI LARUTAN TERHADAP RAPAT ARUS DIFUSI ION PADA MEMBRAN KITOSAN Umi Hariyani; Ni Nyoman Rupiasih; I Gde Antha Kasmawan
BULETIN FISIKA Vol 14 No 2 (2013): 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

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An investigation of the effect of concentration and ion valence of solution on the current density on biopolymer chitosan membrane has been done. The study aimed to determine the current-voltage characteristics of chitosan membrane especially for ion diffusion. Membrane used was chitosan membrane with matrix of 2%, and the electrolyte solution was NaCl (ionic valence+1) and CaCl2 (ionic valence+2), with various concentration of 0.1 mM, 1mM, 10mM, 100mM and 1000mM. Transport process is done by using a model cell membrane consisting of 2 rooms. The voltage difference of membrane is measured using “a calomel electrode of Activon AEP Single Jnct 12x120 mm”. From the observations obtained, the higher concentration difference in the both rooms and the greater value of ion valence, the current density of ionic diffusion increased, especially at the highest concentration difference e.g. 1000 mM: 0.1 mM, the diffusion force generated was large enough.

Treatment of 40 kHz continuous ultrasound towards blood cells of mice (Mus musculus L) Kasmawan, I Gde Antha; Sutapa, Gusti Ngurah; Yuliara, I Made
International journal of life sciences Vol. 2 No. 3 (2018): December
Publisher : Universidad Tecnica de Manabi

The application of ultrasound in mice has increased the activity of mice and showed anxious behavior that affects the blood cells of mice. This study aims to observe the effect of 40 kHz ultrasound exposure on the content of leukocytes and erythrocytes in blood cells of mice. For this purpose, five ultrasound treatments with sound pressure levels were 70, 75, 80, 85, and 90 dB respectively and one control in six sample groups, each consisting of five mice with the same weight and age. Sound treatment is carried out with a 40 kHz continuous ultrasound exposure of the same duration for two hours. Taking blood samples of mice is carried out as soon as the sample is given a sound treatment. Based on the results of blood tests of mice it was found that the average increase in the number of leukocyte mice varied between 40-1,070 cells/mm3 for variations in sound pressure levels from 70 to 90 dB with an increase in the highest average number of leukocyte (1,070 cells/mm3) at the sound pressure level 75 dB. With the same level of sound pressure level, the decrease in the average number of erythrocytes varied between 920,000-190,000 cells/mm3 with a decrease in the highest average number of erythrocytes (920,000 cells/mm3) at an 80 dB sound pressure level. The optimum level of sound pressure that can affect the average number of leukocytes and erythrocytes in blood cells of mice are still unknown.

Efek Induksi Mutasi Radiasi Gamma 60Co Pada Pertumbuhan Fisiologis Tanaman Tomat (Lycopersicon esculentum L.) Gusti Ngurah Sutapa; I Gde Antha Kasmawan
Jurnal Keselamatan Radiasi dan Lingkungan Vol 1, No 2 (2016): Desember 2016
Publisher : Pusat Teknologi Keselamatan dan Metrologi Radisasi - BATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (451.402 KB)

Hampir seluruh jenis masakan di Indonesia menggunakan tomat (Lycopersicon esculentum L.) sebagai bahan dasar pembuatannya. Nilai gizi yang terkandung dalam tomat juga cukup tinggi, karena terdapat sejumlah kandungan vitamin yang diperlukan oleh tubuh manusia. Selain itu, tomat menjadi tanaman unggulan nasional komoditas hortikultura dan prioritas utama pada sejumlah provinsi di Indonesia. Demikian banyak manfaat dari tomat mengindikasikan bahwa produktivitas tomat harus segera ditingkatkan. Salah satu peningkatan dari segi kualitas dapat dilakukan dengan cara induksi mutasi dengan radiasi gamma Co-60. Induksi mutasi adalah perubahan genetik yang disebabkan oleh usaha manusia, salah satu caranya yaitu dengan bahan radioaktif. Radiasi gamma Co-60 dari pesawat IRPASENA dipaparkan pada biji tomat dengan perlakuan dosis 50, 100, 150, 200 dan 250 Gy. Selanjutnya dilakukan pengukuran terhadap pertumbuhan fisiologis meliputi lebar daun, tinggi tanaman, jumlah buah dan berat basah buah tomat dari minggu-1 hingga panen. Hasil penelitian menunjukan kurva pertumbuhan fisiologi tanaman tomat sesuai dengan kurva sigmoidal pertumbuhan tanaman. Pertumbuhan fisiologis tanaman tomat optimal pada dosis radiasi gama Co-60 100 Gy. Pada dosis optimal tersebut pertumbuhan fisiologis tanaman tomat diketahui yang terbaik (unggul) dibandingkan pada dosis di bawah dan di atas 100 Gy maupun kontrol. Almost all types of cuisine in Indonesia are using tomatoes as the base material of manufacture. The nutritional value contained in tomatoes is also quite high, because there is a number of vitamin content required by the human body. In addition, the tomatoes in plants featured national horticultural commodity and priority on a number of provinces in Indonesia. So many benefits of tomatoes indicates that the productivity of tomatoes should be improved. One improvement in terms of quality can be done by means of mutation induction with gamma radiation of Co-60. Induction of mutations are genetic changes caused by human effort, one of them is by using radioactive materials. Gamma rays of Co-60 from the IRPASENA facility was exposed to tomato seeds at doses of 50, 100, 150, 200 and 250 Gy. And then measurements were conducted on the physiological growth of leaf width, plant height, number of fruit and wet weight of tomatoes from week 1 until harvest. The results showed a growth curve of tomato is in accordance with sigmoidal plant physiological growth curve. Optimal physiological growth of tomato plants was obtained at dose of gamma radiation of 100 Gy. At this optimal dose physiological growth of tomato plants is the best (superior) than in doses below and above 100 Gy and control.

Utilization of Bali traditional acoustic tools as physical repellent of bird pest on rice paddy crop Kasmawan, I Gde Antha; Supartha, I Wayan; Wijaya, I Nyoman; Giriantari, Ida Ayu Dwi
International journal of physical sciences and engineering Vol. 2 No. 3: December 2018
Publisher : Universidad Tecnica de Manabi

The purpose of this research is to identify the diversity of Baliâ€™s traditional acoustic tools as a physical repellent of bird pest on rice paddy crop that characterizes local Balinese wisdom as well as analyze their existence and possible modification of tools. The method used is survey method through questionnaire and direct interview to farmers (age 60 years and over) in three rice paddy crop centers, namely Tabanan (6 villages), Badung (5 villages), and Gianyar (2 villages) regencies. Based on the survey of 127 respondents, 52 people from Tabanan, 42 from Badung and 33 from Gianyar, it was found that the most common types of Baliâ€™s traditional acoustic tools used to repel bird pest by farmers, in Balinese terms, are kepuakan (91.3%), followed by pindekan (5.5%), pecut (2.4%) and kulkul (0.8%). Kepuakan is more chosen because it is considered more effective and comfortable to use to repel bird pest in rice paddy crop. According to the respondents, the most effective sequence of acoustic tools from high to low is kepuakan (80.3%), followed by pecut (10.2%), pindekan (8.7%), kulkul (0.8 and for the comfort of the use of tools, the order is kepuakan (85,8%). followed by pindekan (9.4%), kulkul (3.9%) and pecut (0.8%). All the traditional tools are the result of handicrafts Bali farmers use natural materials and are a form of the local wisdom of Balinese farmers that are certainly environmentally friendly.

Bird pest attack and sound characteristics of bamboo traditional instruments as bird pest repellent on rice fields in Bali Kasmawan, I Gde Antha; Supartha, I Wayan; Wijaya, I Nyoman; Giriantari, Ida Ayu Dwi
International journal of life sciences Vol. 2 No. 3 (2018): December
Publisher : Universidad Tecnica de Manabi

The purpose of this study was to observe the attack of bird pest and examine Balinese bamboo traditional instruments, (in local language called kepuakan), as a repellent of bird pest. The research method used is the survey method, sample testing, or a combination of both. For bird pest attack, the survey results show that damage in rice panicles can reach 75% more. For kepuakan, the results of the survey and testing of the kepuakan samples in three rice planting centers, namely Tabanan, Badung, and Gianyar regencies, showed that kepuakan was made of bamboo rope (Giganlochloa apus) and jajang bamboo (Giganlochloa ridleyi) with various dimensions, length from 39.0-75.2 cm, diameter from 4.7-6.6 cm, thick bamboo from 0.4-0.8 cm. Sound characteristics produced by kepuakan are similar to knocking sound with the maximum sound pressure level varies from 101-112 dB at 10 cm distance and with frequency interval between 509-1,889 Hz with an average frequency of 1,205 Hz which is still within the range of hearing of birds. Based on the results of the characteristic test, the instrument of kepuakan is still feasible and safe to use as bird pest repellent on rice fields.

Development and optimization of the ratio vegetation index on the visible and infrared spectrum Yuliara, I Made; Sutapa, Gusti Ngurah; Kasmawan, Gde Antha
International journal of physical sciences and engineering Vol. 2 No. 2: August 2018
Publisher : Universidad Tecnica de Manabi

This study aims to find a suitable vegetation index model to analyze the distribution of clove vegetation in Buleleng regency, Bali. Vegetation index model Ratio Vegetation Index (RVI) extracted from Landsat 8 was developed in the visible spectrum (l = 0.450 - 0.680 ?m) and infrared (l = 0.845 - 2.300 ?m). Development methods are carried out on the basis of the spectral reflectance response characteristics of the dominant electromagnetic waves from the visible and infrared spectra of vegetation. Created a multiple regression relationship results from scattergram that links RVI vegetation index with band 3 = B3, band 5 = B5, band 6 = B6, and band 7 = B7. Optimization strategy is carried out by dividing the development of RVI with a variable number factor. There are 4 forms of RVI vegetation index models from the development and optimization of the visible and infrared spectra. Of the 4 new vegetation index forms, which provide optimal results and close to extensive data from the Forestry and Plantation Service, Buleleng regency, Bali is RVInew4 = 0.0022 + 0.00142 * B3 + 0.00028 * B5 + 0.00054 * B6 + 0.00096 * B7. The area produced by this vegetation index model in analyzing the distribution of clove vegetation is 7667.82 ha. Is this area 99.40% of the average data area? the Forestry and Plantation Service, Buleleng regency, Bali in 2014, which is 7622.32 ha. The dominant distribution of clove vegetation is in the rare category with an area of 7441.74 ha.

Comparative Study on NDVI with RVI for Estimated Area and Class Distribution Yuliara, I Made; Ratini, Ni Nyoman; Kasmawan, I Gde Antha
International journal of physical sciences and engineering Vol. 3 No. 2: August 2019
Publisher : Universidad Tecnica de Manabi

This study aims to determine the differences and comparison of the results of the estimated area, the distribution of clove vegetation using the Normalized Difference Vegetation Index (NDVI) and Ratio Vegetation Index (RVI) and to choose a vegetation index that is more suitable for clove vegetation analysis in Buleleng district, Bali. The method used is to compare statistically descriptive area and distribution class produced by the NDVI and RVI models with area data from the Forestry and Plantation Service (FPS), Buleleng regency, Bali in 2014, amounting to 7622.32 ha. The estimated area of ??clove vegetation by the NDVI model was 7852.68 ha and the RVI model was 7669.44 ha. There is an estimated difference in the area of ??clove vegetation of 183.24 ha and a difference in the broad class category of 2453.85 ha for the Rare class (NDVI > RVI) category, for the Medium class of 1611.45 ha (RVI > NDVI), and for the Dense class of 659.16 ha (RVI > NDVI). Comparison of the area with FPS data obtained 97.07% for the NDVI model and 99.39% for the RVI model. This shows that the RVI model vegetation index is more suitable for use in the estimation of the area and class of clove vegetation distribution in Buleleng regency, Bali.

Identification Of Press Brick Composition As A Sound Absorbers Ni Made Wedayani; I Gde Antha Kasmawan; Windaryoto Windaryoto
BULETIN FISIKA Vol 19 No 1 (2018): 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

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Abstract – Sound absorption research using the press brick made of cement and sand has been done. The research was conducted to determine the effect of mixture on the absorption coefficient value of sound of the brick. In this research have made three variations ratio of cement : sand, that is 1:15, 1:10 and 1: 5 at pressure of 0.30 MPa. The physical quantity measured is the intensity of sound (dB) in the cube-shaped building model (74 x 74 x 68) cm3 by using a sound level meter. The intensity of sound is determined by nomogram method by varying the sound frequency of 1 - 10 kHz for 5 minutes. It is found that the absorption coefficient value increases with increasing frequency. At frequency range of 1 – 6 kHz, brick with ratio cement : sand of 1:15 has the highest absorption coefficient value, while at frequency range of 6 - 10 kHz, brick with ratio cement : sand of 1: 5 which has the highest absorption coefficient value.

Co-Authors Efrensiana Ana Melti G. N. Sutapa G. N. Sutapa G.N. Sutapa Gusti Ngurah Sutapa Hadi Apriandi I G. A. Widagda I Gusti Agung Ngurah Ari Kusuma Putra I Made Satriya Wibawa I NYOMAN WIJAYA I Putu Wahyu Pranata Kusuma Jaya I Wayan Supardi I. M. Yuliara I. M. Yuliara I.M. Yuliara Ida Ayu Dwi Giriantari M. Zully Amrul Hadi N. L. P. Trisnawati N. N. Ratini N. N. Ratini Ni Made Wedayani Ni Nyoman Rupiasih Ni Nyoman, Ratini Satriya Wibawa, I Made Suandayani, Ni Komang Tri Umi Hariyani W. T. Baskoro Winardi Tjahjo Baskoro Windaryoto Windaryoto Yuliara, I Made

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