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All Journal Buletin Udayana Mengabdi Jurnal Biologi Udayana Bumi Lestari BULETIN FISIKA Jurnal Keselamatan Radiasi dan Lingkungan
I Gde Antha Kasmawan
Department Of Physics, Faculty Of Mathematics And Natural Sciences, Udayana University, Indonesia
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Environmental Science Materials Science & Nanotechnology Physics

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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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (279.284 KB) | DOI: 10.24843/BUM.2018.v17.i01.p18

Abstract

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.
PENGELOLAAN LABORATORIUM DAN PENGETAHUAN GURU IPA DALAM MEMBUAT MODUL PRAKTIKUM DI SMP TAMAN SASTRA JIMBARAN G. N. Sutapa; N. N. Ratini; I. M. Yuliara; I. G. A. Kasmawan
Buletin Udayana Mengabdi Vol 19 No 1 (2020): Buletin Udayana Mengabdi
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (326.987 KB) | DOI: 10.24843/BUM.2020.v19.i01.p23

Abstract

Hasil identifikasi keberadaan tenaga laboratorium IPA di SMP Taman Sastra Jimbaran Kuta Selatan, Badung adalah sekolah swasta yang menunjukkan bahwa umumnya kualifikasi pendidikan tenaga yang ditugaskan di laboratorium IPA belum memenuhi persyaratan standar tenaga laboratorium sekolah. Data yang diperoleh dari interview dengan guru IPA di SMP Taman Sastra Jimbaran, menyatakan bahwa sebagian besar guru IPA masih mengalami masalah untuk melakukan praktikum tentang topik-topik tertentu, tidak semua konsep-konsep IPA eksperimental dapat diajarkan dengan praktikum karena keterbatasan alat-alat dan bahan yang tersedia. Salah satu kendala yang menghambat kelancaran pelaksanaan pembelajaran IPA di laboratorium adalah terbatasnya jumlah dan/atau jenis alat yang tersedia dan belum memiliki petunjuk praktikum yang tersusun secara permanen (dalam bentuk Modul). Hasil pengabdian ini telah mengasilkan beberapa alat praktikum sederhana dan dilengkapi dengan modul praktikum yang telah tersusun dengan baik. Diakhir kegiatan alat praktikum dan modul prkatikum diserahkan kepada SMP Taman Sastra Jimbaran. . Kata kunci : Laboratorium, alat praktikum, modul praktikum
ANALISIS WAKTU PEMUPUKAN TANAMAN SAWI HIJAU (Brassica rapa var. parachinensis) DENGAN TEKNIK PERUNUT RADIOAKTIF Gusti Ngurah Sutapa; Ni Nyoman Ratini; Gde Antha Kasmawan
Jurnal Biologi Udayana Vol 20 No 1 (2016): Jurnal Biologi
Publisher : Program Studi Biologi, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Udayana

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Abstract

Telah dilakukan penelitian analisis waktu pemupukan pada tanaman sawi hijau (Brassica rapa var. parachinensis)dengan teknik perunut radioaktif. Untuk menuju sistem pertanian berkelanjutan perlu adanya perbaikan pertanian(intensifikasi) selama beberapa tahun yang lalu masih signifikan, karena ketersediaan sumber daya alam danteknologi pertanian cukup memadai dan berimbang dengan ketersediaan lahan dan peningkatan jumlah penduduk.Keadaan ini sulit untuk dipertahankan dimasa yang akan datang, kecuali ada pendekatan baru yang menawarkan ide dan teknik untuk meningkatkan produktifitas pertanian. Efesiensi pemupukan tanaman dengan teknik perunut (tracer) radioisotop adalah salah satu potensi menujusistem pertanian berkelanjutan. Teknik perunut dapat digunakan antara lain untuk mempelajari hubungan antaratanah dan tanaman, menentukan kondisi optimal dalam penggunaan pupuk (waktu pemupukan, pola perakaranaktif tanaman, jenis dan takaran pupuk), mempelajari proses dekomposisi dan mineralisasi bahan organik, sertamempelajari proses fotosintesis tanaman,baik dengan metoda langsung maupun tidak langsung.Waktu pemupukanyang lebih tepat dapat ditentukan dengan teknik perunut tersebut, sehingga optimalisasi pemupukan dapat dicapai,tanpa pemborosan yang tidak berguna.Dari penelitian dengan menggunakan radioisotop P, ternyata waktupemupukan pada tanaman sawi hijau (Brassica rapa var. parachinensis) yang paling signifikan adalah padapukul 9.00 pagi. Waktu siang hari mulai pukul 11.00 sampai pukul 15.00 adalah waktu pemupukan yang sangatburuk. Sedangkan waktu sore hari yaitu pukul 15.00 sampai 17.00 menunjukkan waktu pemupukan yang semakinbaik namun tidak signifikan.32
Pemberdayaan Kelompok Lanjut Usia melalui Pengenalan Teknologi Pembuatan Pupuk Organik Cair (POC) sebagai Upaya Bentuk Kepedulian terhadap Lingkungan I Gde Antha Kasmawan; Gusti Ngurah Sutapa; I Made Yuliara
Bumi Lestari Journal of Environment Vol 17 No 2 (2017)
Publisher : Environmental Research Center (PPLH) of Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/blje.2017.v17.i02.p01

Abstract

In order to avoid post power syndrome, the elderly who have a hobby of farming / gardening can be empowered through the introduction of LOF (liquid organic fertilizer) making technology and its application. The aim is for the elderly to understand the technology of making organic fertilizers that are lightweight, useful and entertaining as well as for them to feel contribute in maintaining the environment. The training method applied is a combination of interactive lecture and practice methods. Based on these methods, have succeeded in growing their creativity in making LOF and feel comforted on the results obtained. Successful LOF products contained nitrogen, phosphorus and potassium (NPK) of 146,701 mg / L, 0.741 mg / L, and 0.035 mg / L, respectively, and magnesium (Mg) and calcium (Ca) of 86.332 mg / L and 1.970 mg / L. The application of LOF products has been done on the orchid plants (Phalaenopsis amabilis) with satisfactory results. Thus, the mastery of LOF making technology and its application will reduce the dependence of chemical fertilizer use and replace it with homemade organic fertilizer so it can contribute in maintaining health and environmental sustainability.
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 February Edition
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

Abstract

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).
Rancang The Prototype of Water Level Detection System Using HC-SR04 Sensor and GSM SIM800L Module Based on ATMega 328 Microcontroller I Putu Wahyu Pranata Kusuma Jaya; I Gusti Agung Widagda; I Gde Antha Kasmawan
BULETIN FISIKA Vol 24 No 1 (2023): BULETIN FISIKA February Edition
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.2023.v24.i01.p05

Abstract

A prototype of water level detection has been designed using the HC-SR04 sensor and the GSM SIM800L module based on the ATMega328 Microcontroller. This study aims to monitor the water level through indication media such as LED colors and different buzzer sounds. In addition, the communication medium between the user and the design tool is using SMS. Users can also control the Relay and provide information in the form of current water levels via SMS. The components used to design this system are Arduino Uno, sensor HC-SR04, GSM SIM800L Module, LCD, LED, buzzer and Step-Down regulator. The principle of this system is the system will indicate the water level through predetermined statuses, such as safe, alert and dangerous. Each status has a different LED color and buzzer sound. When the water level reaches the threshold value for each status, the design tool will send a message to the user in the form of the current status and water level. When the water level reaches dangerous status, the relay will turn on and off when the water level reaches safe status. Based on the standard deviation value, the designed tool has a fairly small standard deviation between 0-0.2 cm so that the tool is said to be quite precision. Meanwhile, based on the results of the calibration test between the read distance on the LCD and the ruler, the coefficient of determination is 0.9996 or 99.96% and SMS with the ruler obtained 0.9997 or 99.97%. This indicated that the designed tool has good accuracy. Abstrak Telah dirancang sistem pendeteksi ketinggian air menggunakan sensor HC-SR04 dan modul GSM SIM800L berbasis Mikrokontroler ATMega328. Penelitian ini bertujuan untuk memantau ketinggian air melalui media indikasi seperti warna LED dan bunyi buzzer yang berbeda. Selain itu, media komunikasi antara pengguna dengan alat rancangan yaitu menggunakan SMS. Pengguna juga dapat mengontrol Relay dan memberi informasi berupa ketinggian air saat ini kepada alat rancangan melalui SMS. Komponen-komponen yang digunakan dalam merancang sistem ini adalah Arduino Uno, sensor HC-SR04, modul GSM SIM800L, LCD, LED, buzzer, regulator step-down. Prinsip kerja dari sistem ini adalah sistem akan mengindikasikan ketinggian air melalui status-status yang telah ditentukan yakni aman, siaga dan bahaya. Setiap status memiliki warna LED serta bunyi buzzer. Ketika ketinggian permukaan air mencapai nilai ambang pada setiap status maka alat rancangan akan mengirimkan pesan kepada pengguna berupa status serta ketinggian air saat ini. Ketika tinggi permukaan air mencapai status bahaya, maka Relay akan menyala dan mati ketika ketinggian permukaan air mencapai status aman. Berdasarkan nilai standar deviasi, alat yang dirancang memiliki standar deviasi yang cukup kecil antara 0-0,2 cm sehingga alat dikatakan cukup presisi. Sedangkan, berdasarkan hasil uji kalibrasi antara jarak yang terbaca pada LCD dengan mistar diperoleh koefisien determinasi sebesar 0,9996 atau 99,96% dan SMS dengan mistar diperoleh 0,9997 atau 99,97%. Hal ini menunjukkan bahwa alat yang dirancang memiliki akurasi yang baik.
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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Abstract

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.
PENGARUH TINGKAT INTENSITAS GELOMBANG ULTRASONIK TERHADAP JUMLAH SEL DARAH PUTIH (LEUKOSIT) DAN SEL DARAH MERAH (ERITROSIT) PADA MENCIT M. Zully Amrul Hadi; I Gusti Ngurah Sutapa; I Gde Anta Kasmawan
BULETIN FISIKA Vol 17 No 1 (2016): 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

The level of sensitivity and auditory responses observed due to the influence of sound waves can be used as bio-indicators of noise. The aims of this study are to determine the effect of the intensity level of ultrasonic waves to leukocytes and erythrocytes, and to observe the optimal intensity level that can affect the quantity of leukocytes and erythrocytes of mice. Ultrasonic waves with varying levels of intensity of 70 dB, 75 dB, 80 dB, 85 dB, and 90 dB were exposed to the mice for 2 hours, then the quantity of leukocytes and erythrocytes of the mice were observed. The average number of leukocytes in those variation of the intensity level respectively are (4,13±0,50) x103; (5,20±0,62) x103; (5,48±0,72) x103; (5,87±0,65) x103 dan (6,04±0,32) x103; while the average number of erythrocytes respectively are (7,29±0,14) x106; (7,10±0,22) x106; (6,18±0,24) x106;( 5,96±0,52) x106; dan (5,75±0,41) x106 . The average number of leukocytes increased, while erythrocytes decreased as the increasing of intensity level of ultrasonic waves. The optimal intensity level of ultrasonic waves affecting the quantity of leukocytes and erythrocytes of mice has not been known yet from this study.
PEMANFAATAN RADIASI GAMMA Co-60 DALAM PEMULIAAN TANAMAN TOMAT (Lycopersicon esculentum L.) DENGAN METODE MUTAGEN FISIK I Gusti Agung Ngurah Ari Kusuma Putra; I Gusti Ngurah Sutapa; I Gde Antha Kasmawan
BULETIN FISIKA Vol 18 No 1 (2017): 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

A research on Co-60 gamma radiation effect of induced mutation in physiological growth of tomato plant (Lycopersicon Esculentum L.) has been done. Tomato plant quality can be improved through induced mutation Co-60 gamma radiation. Genetic change could be caused by induced mutation from radioactive material as a human effort. IRPASENA plant with Co-60 gamma radiation source exposed with dosage treatment of 50 Gy, 100 Gy, 150 Gy, 200 Gy and 250 Gy in tomato seeds. The measurement carried out against the physiological growth of plant height, leaves width, amount and weight of tomato fruits at the first week until harvest time. Result shows that the correct radiation dosage for tomato breeding is 100 Gy. Radioactivity concentration in improved tomato fruits after radiation exposure is less than 1.00 Bq/kg. Vitamins content on improved tomato fruits after exposure, particularly on vitamin C is 130.000 mg/kg compared to control fruit that is 70.000 mg/kg, the vitamin B1 also shows increased value (0.63 mg/kg) compared with control fruit (0.496%).
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

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 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 Ni Made Wedayani Ni Nyoman Rupiasih Ni Nyoman, Ratini Satriya Wibawa, I Made Suandayani, Ni Komang Tri Umi Hariyani Winardi Tjahjo Baskoro Winardi Tjahyo Baskoro Windaryoto Windaryoto Yuliara, I Made