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All Journal Jurnal Sains dan Teknologi BAREKENG: Jurnal Ilmu Matematika dan Terapan Bioscientist : Jurnal Ilmiah Biologi Jurnal Altifani Penelitian dan Pengabdian kepada Masyarakat International Journal of Hydrological and Environmental for Sustainability Physikos: Journal of Physics and Physics Education
Buka, Oktosea
Program Studi Fisika, Fakultas Ilmu Alam Dan Teknologi Rekayasa, Universitas Halmahera, Jl. Wari Raya, Tobelo, Halmahera Utara 97762
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Nursing Physics Public Health Social Sciences Transportation

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PENERAPAN POLINOMIAL ORDE-N DAN MALTHUSIAN PADA STUDI KASUS KAJIAN DAYA TAMPUNG WISATAWAN Dalengkade, Mario Nikolaus; Yusniar, Masitah; Tjape, Willyam; Boleu, Fiktor Imanuel; Buka, Oktosea
JST (Jurnal Sains dan Teknologi) Vol 10, No 2 (2021)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jst-undiksha.v10i2.38969

Abstract

Terletak di kawasan timur Indonesia, Tobelo Kabupaten Halmahera Utara terkenal dengan keindahan alamnya. Mamuya adalah destinasi wisata pemandian air panas yang memiliki keindahan alam. Pemandian air panas ini selalu ramai dikunjungi wisatawan lokal. Tapi pada faktanya destinasi mamuya belum dikelola berdasarkan ekologi. Luaran analisis menunjukan y=-0.179x^6+7.086x^5-109.0x^4+824.1x^3-3176x^2-5756x-2832 dengan R2 = 0.793. Fungsi tersebut merepresentasikan kunjungan wisatawan, setiap bilangan yang bernilai positif mengindikasikan penambahan wisatawan. Sedangkan bilangan negatif merupakan kebalikan dari positif. Analisis daya dukung destinasi mamuya yakni 606.25 wisatawan per tahun sedangkan populasi maksimum kunjungan menyentuh angka 737.15 wisatawan per tahun. Data ini mengindikasikan terjadinya kelebihan kapasitas di kawasan wisata.
Literasi Barisan, Deret, Algoritma, Pemograman, dan Pengaplikasiaanya untuk Komputer Sains Mario Nikolaus Dalengkade; Yesti Norce Velanita Tjotjomare; Rukia Loklomin; Maria Elisabet Woka; Triana Ongis; Oktosea Buka; Lian Fira Kutani; Devimega Yulia
Jurnal Altifani Penelitian dan Pengabdian kepada Masyarakat Vol. 2 No. 3 (2022): Mei 2022 - Jurnal Altifani Penelitian dan Pengabdian kepada Masyarakat
Publisher : Indonesian Scientific Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25008/altifani.v2i3.241

Abstract

Revolusi industri 4.0 menuntut perubahan dalam dunia pendidikan dimana tidak hanya menilai pada sisi akademik, tapi sampai pada tahap pengembangan soft skill dan technical skill dengan mengintegrasikan teknologi yang bermuara pada pembentukan karakter. Upaya yang dilakukan guna menunjang tuntutan tersebut, maka pelaksanaan kegiatan Pengabdian Kepada Masyarkat bertujuan mengkombinasikan teknologi dalam pembelajaran untuk materi barisan, deret, algoritma, dan pemograman di Sekolah Menengah Kejuruan Halmahera Utara. Guna mencapai tujuan, pendekatan yang dipakai yakni metode pemecahan masalah, dan pengukuran keberhasilan diukur menggunakan skala linkert. Hasil menunjukkan penggunaan metode pemecahan masalah meningkatkan pengetahuan akan materi yang dijabarkan pada rentang 8%-13%. Menelaah uraian singkat mengenai pendekatan metode pemecahan masalah dapat dikatakan berhasil, sehingga memungkinkan diaplikasikan dalam pembelajaran matematika.
Identification of the Distribution and Volume of Iron Sand in the Gura Beach Area Using the Wenner-Schlumberger Configuration Geoelectric Method Tjinta, Yumarti G B; Sadjab, Bayu Achil; Kurnia, Kurnia; Janis, Harsen Berg; Yusniar, Masitah; Buka, Oktosea; Iwamoni, Steven; Nur, Adrian Rahmat
International Journal of Hydrological and Environmental for Sustainability Vol. 2 No. 2 (2023): International Journal of Hydrological and Environmental for Sustainability
Publisher : CV FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/ijhes.v2i2.253

Abstract

The Naniura NRD300 HF tool has been used in research using the Wenner-Schlumberger configuration geoelectric method to determine the direction of iron sand distribution, the volume of iron sand, and the concentration of iron sand in the Gura beach area. The collected measurement results are then processed by the RES2DINV software into a 2 Dimension (2D) cross-section that shows the distribution values of the subsurface layer as shown by a color image. Once saved in (.xyz) format, the RES2DINV software results are processed in RockWork software to create pseudo-3D cross sections. The RES2DINV software's results show that line 1's resistivity value ranges from 39.6 to 1000 Ωm, whereas line 2's resistivity value ranges from 0.16 to 1.7 Ωm. These findings suggest that line 2 has a lower resistivity value than line 1 does. The volume of iron sand processed by RockWork software is 221,000 cubic meters for linek 2 and 273,000 cubic meters for line 1. The distribution of iron sand deposits in the study region is south to north, based on the volume of iron sand in line 1, which is bigger. A method used to determine the composition of the minerals present in a sample is called X-ray fluorescence (XRF). The results of analyzing the Fe content in line 2 are 55.01%, which is higher when compared to the Fe content in line 1, which is 40.5%.
Geoelectric Interpretation of Wenner-Schlumberger Configuration Using Res2Dinv Software: A Case Study of 2D Mapping of Seawater Intrusion in a Landslide Potential Area, North Halmahera District, Indonesia Tambanaung, Andrisal; Sadjab, Bayu Achil; Kurnia, Kurnia; Janis, Harsen Berg; Yusniar, Masitah; Buka, Oktosea; Iwamoni, Steven; Nur, Adrian Rahmat
International Journal of Hydrological and Environmental for Sustainability Vol. 3 No. 1 (2024): International Journal of Hydrological and Environmental for Sustainability
Publisher : CV FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/ijhes.v3i1.378

Abstract

Research has been carried out on landslides in Saluta-Pelita Village, North Galela District, North Halmahera Regency, Indonesia using the Wenner-Schlumberger method using a Geoelectric Resistivity tool - Naunira NRD 300 HF. This research aims to determine the structure of the subsurface layer in the potential landslide area of Saluta-Pelita Village. In addition, this research aims to determine the slip plane (boundary layer) of sea water intrusion in the research area. The measurement results are processed using Res2Dinv software for 2D resistivity which describes the subsurface layer shown in color. The measurement results on track 1 show a clay layer with a resistivity value of 3.1 ohm -27 ohm at a distance of 1-80 meters (blue and green), a silt layer of 44.3 ohm - 184.1 ohm at a depth of 1-20 meters (Yellow) which is a slip plane (boundary layer) of sea water intrusion with a path length of 40 meters, conglomerate 210 ohm (red) at a depth of more than 7.50 meters. In track 2 there is a layer of clay with a resistivity of 1.4 ohm - 39 ohm at a depth of 1-24 meters (blue and green), silt 43.1 m-185.6 m (yellow) is the slip plane (layer boundary) of sea water intrusion with a 95 meter long track, a conglomerate layer with a resistivity of 203.4 ohm - 407.8 ohm (red) at a depth of more than 12.8 meters. On track 3 there is a layer of clay with a resistivity of 0.186 ohm - 31.4 ohm (blue and green) at a depth of up to 24 meters with a length of more than 120 meters, silt with a resistivity value of 44.4 ohm - 189 ohm (yellow) which is a slip plane (boundary layer) sea water intrusion with a path of 65 meters at a depth of 2.50 meters-24.9 meters.
VISIT PROFILES AND TOURISM DESTINATION THRESHOLDS USING POLYNOMIAL AND MALTHUSIAN Dalengkade, Mario Nikolaus; Kaseside, Meidy; Maatoke, Cornelia Dolfina; Boleu, Fiktor Imanuel; Buka, Oktosea; Loklomin, Samsul Bahri; Mangimbulude, Jubhar Christian
BAREKENG: Jurnal Ilmu Matematika dan Terapan Vol 16 No 1 (2022): BAREKENG: Jurnal Ilmu Matematika dan Terapan
Publisher : PATTIMURA UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (650.581 KB) | DOI: 10.30598/barekengvol16iss1pp113-120

Abstract

Kumo, Kupa-Kupa, Pitu, and Luari beaches are tourist destinations that are always crowded with local and foreign tourists. This becomes interesting, because recently the problem of human population density in an area has become a hot topic for study. Using the polynomial method, it resulted in 6th order with R2 0.950 (Kumo), 0.868 (Kupa-Kupa), 0.799 (Pitu), and 0.399 (Luari) representing the distribution of visits. The highest levels of visits occurred in the twelfth, fifth, fourth, and sixth months, respectively. The analysis by applying the logistics function shows the highest level of visits throughout 2018 which are Kumo 283.95 tourists, Kupa-Kupa 342.12 tourists, Pitu 81.77 tourists and, Luari 1088.35 tourists. Based on the threshold analysis, the threshold value shows 255.56 tourists (Kumo), 297.08 tourists (Kupa-Kupa), 65.58 tourists (Pitu), and 836.42 tourists (Luari). The results of this study inform the level of tourist visits exceeding the threshold value in four tourist destinations. Given that the four tourist destinations carry the concept of ecology as a selling point, the manager needs to reorganize the level of tourist visits. Excess levels of tourist arrivals can have a negative impact on the comfort and sustainability of tourist destinations
Analisis Kualitas Air pada Mata Air di Desa Galao, Kecamatan Loloda Utara, Kabupaten Halmahera Utara Buka, Oktosea; Lotono, Mutia; Yusniar, Masitah; Janis, Harsen Berg; Boleu, Fiktor Imanuel; Akyuwen, Frandy
Physikos: Journal of Physics and Physics Education Vol 4 No 1 (2025): Physikos: Journal of Physics and Physics Education
Publisher : Pattimura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/physikos.4.1.19767

Abstract

Water plays an important role in human life, and one of the water resources that can be a source of clean water is groundwater or what is also called a spring. Therefore, the spring in Galao Village, North Loloda District, North Halmahera Regency, needs to be maintained and cared for. In this study, researchers tested water content using several parameters, namely hardness, TDS (Total Dissolved Solids), DHL (Electrical Conductivity), turbidity, and pH. The results of sample testing carried out in two laboratories showed a turbidity of 1.00 NTU and a pH of 7.145 which were tested at the North Halmahera Regency Environmental Service Laboratory. Meanwhile, the main parameters of hardness were recorded at 231 mg/l, TDS 391 mg/l, and DHL 521 μS/cm which were tested at the Manado Industrial Standardization and Service Center (BSPJI) Laboratory. Physically, the three main parameters, namely hardness, TDS and DHL are interrelated; Hardness is caused by contact between water and limestone in the soil layer through which water passes, allowing calcium (Ca) and magnesium (Mg) to dissolve into it. In line with the cause of the presence of dissolved substances caused by weathering, dissolution of rocks and soil and other organic and inorganic substances dissolved in water, there is a relationship between Electrical Conductiv ity (ECP) and the ions contained therein, ions in water come from dissolved salts of alkali compounds, chloride sulfide dissolved in water. The purpose of this study is to determine the content of Hardness, Total Dissolved Solids (TDS), Electrical Conductivity (DHL), Turbidity, and pH contained in water.
PENERAPAN POLINOMIAL ORDE-N DAN MALTHUSIAN PADA STUDI KASUS KAJIAN DAYA TAMPUNG WISATAWAN Dalengkade, Mario Nikolaus; Yusniar, Masitah; Tjape, Willyam; Boleu, Fiktor Imanuel; Buka, Oktosea
JST (Jurnal Sains dan Teknologi) Vol. 10 No. 2 (2021)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (396.514 KB) | DOI: 10.23887/jstundiksha.v10i2.38969

Abstract

Terletak di kawasan timur Indonesia, Tobelo Kabupaten Halmahera Utara terkenal dengan keindahan alamnya. Mamuya adalah destinasi wisata pemandian air panas yang memiliki keindahan alam. Pemandian air panas ini selalu ramai dikunjungi wisatawan lokal. Tapi pada faktanya destinasi mamuya belum dikelola berdasarkan ekologi. Luaran analisis menunjukan y=-0.179x^6+7.086x^5-109.0x^4+824.1x^3-3176x^2-5756x-2832 dengan R2 = 0.793. Fungsi tersebut merepresentasikan kunjungan wisatawan, setiap bilangan yang bernilai positif mengindikasikan penambahan wisatawan. Sedangkan bilangan negatif merupakan kebalikan dari positif. Analisis daya dukung destinasi mamuya yakni 606.25 wisatawan per tahun sedangkan populasi maksimum kunjungan menyentuh angka 737.15 wisatawan per tahun. Data ini mengindikasikan terjadinya kelebihan kapasitas di kawasan wisata.
Inovasi Grafting Mangga Dodol (Mangifera indica L.) Berdasarkan Tipe Mata Tunas dan Panjang Entres Boleu, Fiktor Imanuel; Buka, Oktosea; Nusa, Davidson Corneles; Samloy, Vanhurd
Bioscientist : Jurnal Ilmiah Biologi Vol. 12 No. 1 (2024): June
Publisher : Department of Biology Education, FSTT, Mandalika University of Education, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/bioscientist.v12i1.10104

Abstract

The research was conducted to determine the effect of selecting the type of entres length and bud eyes in grafting dodol mango (Mangifera indica L) on the process of bud initiation, bud height, and leaf width. The experimental design used was Randomized Complete Block Design with factorial pattern. The first treatment is the type of entres length, namely 7 cm (P1), 10 cm (P2) and 13 cm (P3) while the second treatment is the type of bud eye of the entres, namely without bud eye (M1), 1 bud eye (M2) and 2 bud eyes (M3). Based on the type of bud eye, treatments P2 and P3 showed a better effect than P1 on the bud initiation process and leaf width parameters. While in the measurement of bud height, P3 treatment showed a better effect than P2 and P1. Meanwhile, in terms of the type of buds, treatments M2 and M3 had a better effect than M1 on the process of bud initiation, bud height and leaf width. The results of the analysis of variance showed that there was an interaction between the type of length and the type of bud eye on all three parameters.
Efektivitas Fotokatalis Arang Untuk Mendegradasi COD, BOD, dan TSS Pada Limbah Tahu Buka, Oktosea; Nurhaedah, Nurhaedah; Kurnia, Kurnia
Bioscientist : Jurnal Ilmiah Biologi Vol. 12 No. 2 (2024): December
Publisher : Department of Biology Education, FSTT, Mandalika University of Education, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/bioscientist.v12i2.12676

Abstract

The presence of tofu waste compounds in water results in pollution that can contaminate biota. A more effective, efficient, easy and cheap organic waste processing technique for the tofu industry is using the photocatalyst method. Photocatalysis is a combination reaction between photochemistry and catalyst with shell charcoal as a catalyst. This research aims to determine the levels of COD, BOD, and TSS in tofu waste before and after photocatalysis, and to determine the effectiveness of charcoal photocatalysis to degrade tofu waste. In the SEM (Scanning Electrone Mycroscope) test results, it was identified that charcoal has a fairly large and loose pore surface. The test results for the water content were 2.4% and the ash content was 11.45% and the ash content did not meet the charcoal quality standards according to SNI 01-1682-1996, the water content was 6% and the ash content was 3%. The FTIR absorption test results that appear indicate the presence of the O-H group, the C-H Streching functional group, the C ≡ N Nitrile functional group (strong), the C=C aromatic ring functional group which is a form of hexagonal charcoal, the C-O functional group and the presence of the C-H aromatic ring functional group. Test results before and after photocatalysis on Tofu waste for COD levels of 122mg/l and >>> mg/l, BOD 3567 mg/l and 2071mg/l, TSS 138 mg/l and 18 mg/l. The effectiveness of charcoal photocatalysis to degrade tofu waste was effectively used for BOD test parameters with a reduction percentage of 41.9%, TSS of 86.9% and for COD test parameters it was not effective for the photocatalyst method.
Identifikasi Sebaran Dan Volume Pasir Besi Menggunakan Metode Geolistrik Konfigurasi Wenner-Schulumberger Dan Analisis Kandungan Fe Didalamnya Menggunakan X-Ray Fluorescence Di Desa Paca Bagian Selatan Papuling, Eminia Sofya; Sadjab, Bayu Achil; Kurnia, Kurnia; Buka, Oktosea; Janis, Harsen Berg; Yusniar, Masitah; Nur, Adrian Rahmat; Anwar, Haerul
Physikos: Journal of Physics and Physics Education Vol 2 No 2 (2023): Physikos: Journal of Physics and Physics Education
Publisher : Pattimura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/physikos.2.2.11723

Abstract

This research uses the Naniura NRD300 HF tool to apply the Wenner-Schlumberger configuration geoelectric method which aims to determine the direction of distribution of iron sand, the volume of iron sand, and the Fe2O3 concentration of iron sand in the southern Paca beach area. The collected measurement results are then processed by RES2DINV software into a 2 Dimensional (2D) cross section which shows the distribution value of the subsurface layer as shown by a color image. After being saved in (.xyz) format, the RES2DINV software results are processed in RockWork software to create a pseudo-3D cross section. The RES2DINV software results show a resistivity value between 0,0761 – 3,59 Ωm which is identified as iron sand with a volume of 13,304 m3 at a depth of 2,50 – 9 meters from the surface of the datum point, while on track 2, the resistivity value ranges between 0,414 – 3,13 Ωm, and at a depth of 2,50 – 7 meters from the surface of the datum point with a volume reaching 12,883 m3 based on the results of the RockWork software. The distribution of iron sand deposits in the study area is from south to north. The method used to determine the composition of minerals present in a sample is called X-ray fluorescence (XRF). The results of the analysis of the Fe2O3 content in the first pass were 36,704% and in pass 2 it was 35,500%.
Co-Authors Adrian Rahmat Nur Akyuwen, Frandy Altje Latununuwe Bayu A. Sadjab Boleu, Fiktor Imanuel Cornelia Dolfina Maatoke Dalengkade, Mario Nikolaus Devimega Yulia Estevanus Kristian Huliselan Haerul Anwar Iwamoni, Steven Janis, Harsen Berg Kaseside, Meidy KURNIA KURNIA, KURNIA Lian Fira Kutani Loklomin, Samsul Bahri Lotono, Mutia Mangimbulude, Jubhar Christian Maranressy, Fera Dominggas Maria Elisabet Woka Nur, Adrian Rahmat Nurhaedah Nurhaedah Nusa, Davidson Corneles Papuling, Eminia Sofya Rukia Loklomin Samloy, Vanhurd Tambanaung, Andrisal Tjape, Willyam Tjinta, Yumarti G B Triana Ongis Yesti Norce Velanita Tjotjomare Yusniar, Masitah