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Suwanto Raharjo
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JNANALOKA
Published by Lentera Dua Indonesia
ISSN : 27227332     EISSN : 27222896     DOI : https://doi.org/10.36802/jnanaloka.2020.v1-no1
Core Subject : Science, Education, Social, Engineering,
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Engineering Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences Transportation Other
JNANALOKA merupakan jurnal ilmiah berbasis blind peer review dan open access terbit mulai tahun 2020 dipublikasikan oleh Lentera Dua Indonesia. Jurnal terbit sebanyak 2 (dua) kali dalam setahun yakni bulan Maret dan September. Redaksi Jurnal JNANALOKA menerima artikel ilmiah orisinil lintas bidang ilmu yang memiliki fokus namun tidak terbatas pada bidang sains dan teknologi baik tingkat dasar, menengah, dan tinggi lintas dan multi disiplin ilmu. JNANALOKA juga menerima artikel yang didasarkan pada penelitian ilmiah secara umum.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 6 Documents
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Search results for , issue "Vol. 03 No. 02 September Tahun 2022" : 6 Documents clear
Analisa gambar citra MRI otak dengan watershed dan ekstraksi fitur GLCM Astika Wulansari; Aulia Tegar Rahman
JNANALOKA Vol. 03 No. 02 September Tahun 2022
Publisher : Lentera Dua Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36802/jnanaloka.2022.v3-no2-39-46

Abstract

Brain tumor is an infection in the form of unwanted tissue and considered as malignant. Nevertheless, it is very difficult to distinguish brain tumor tissue from the rest of the brain. Early detection of tumors is crucial to save the patient’s life. Segmentation strategy is used to identify and parse brain tumor areas utilizing the Magnetic ResonanceImaging (MRI) images of the brain. This is an important breakthrough for the future. Magnetic Resonance Imaging is an extreme field in the image processing area due to the very high level of precision needed by the doctors to obtain precise recommendations about the infections to save the patients’ lives. MRI images can be used to provide information on the separation of brain tumor tissue. Segmentation of MRI images with median filtering and skull stripping preprocessing techniques, threshold grip with watershed obtained contrast results of 4.287, correlation 0.946, homogeneity 0.721, and energy 0.278.
Analisis Efektivitas Marka Kotak Kuning Di Simpang Tiga Jalan Soekarno Hatta – Jalan Arifin Ahmad Kota Pekanbaru Muchammad Zaenal muttaqin; Abdul Kudus Zaini; Zhella Indah Saviri
JNANALOKA Vol. 03 No. 02 September Tahun 2022
Publisher : Lentera Dua Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36802/jnanaloka.2022.v3-no2-57-65

Abstract

One of the interchanges in Pekanbaru City, namely simpang tiga (Jalan Soekarno Hatta - Jalan Arifin Ahmad) has quite dense activities, because this road is an access to the center of community activities to the market area, offices and others. An increase in the number of vehicles larger compared to the available roads leads to congestion. One of the efforts to reduce congestion at intersections is to use yellow box markings. This marking is designed as a vehicleless area, if there is a traffic congestion, vehicle users who are still outside the marking must stop and wait until the traffic jam breaks down. This study aims to analyze the effectiveness of the yellow box markings and the suitability of the yellow box markings. This study used the Regulation of the Minister of Transportation No. 34 of 2014 and the Traffic Signs Manual Chapter 5 Road Markings (2018) and the Indonesian Road Capacity Manual (MKJI) 1997 to determine the effectiveness of intersection performance. The parameter used to determine the effectiveness of interchange performance is the degree of saturation. The results of the analysis found that the size of the yellow box markings at the research site was not appropriate according to Permenhub No.34 of 2014 the width of the straight line and the diagonal line was 10-18 cm and the Traffic Signs Manual Chapter 5 Road Markings (2018) the width of the diagonal line was 15 cm and the width of the straight line was 20 cm, while at the research location the width of the straight line and the diagonal line was 30 cm. For the number of offenders the yellow box markings were 7195 offenders. Based on the results of the saturation degree analysis, for intersection three, the saturation degree value exceeds 1.00 which indicates that the yellow box marking is not effective in improving the performance of the intersection.
Pelatihan Google Classroom Untuk Meningkatkan Kompetensi Guru SD Dalam Pembelajaran Daring Nureyzwan Sabani; Reza Ulva Tamimi; Lisnawati Ruhaena
JNANALOKA Vol. 03 No. 02 September Tahun 2022
Publisher : Lentera Dua Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36802/jnanaloka.2022.v3-no2-47-56

Abstract

Teacher are not ready to carry out online learning in using online media during the covid-19 pandemic because of the lack competence of teachers. The purpose of this activity is to improve the competence of elementary school teachers in using Google Classroom to support online learning. The Program of Community Service is carried out by holding google classroom training for elementary school teachers through the Zoom aplication. To find out the increase in teacher competence, a pretest and posttest were carried out, followed by a t-test. The test results show that there is a significant difference between the results of the pretest and posttest with Z score of -2.032 and a p value of 0.042 <0.05, so it can be concluded that there is an increase in the competence of elementary school teachers in using google classroom after being given training. With this training, it is hoped that teachers can carry out learning with the help of Google Classroom so that online learning can be managed and implemented properly.
Pengembangan Soal Berpikir Kritis Menggunakan Aplikasi Wondershare Quiz Creator Pada Materi Hidrolisis Garam Irfandi Irfandi; Rosa Murwindra
JNANALOKA Vol. 03 No. 02 September Tahun 2022
Publisher : Lentera Dua Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36802/jnanaloka.2022.v3-no2-67-74

Abstract

Critical thinking ability is one of the must-have abilities for students in 21st century learning. This study aims to develop critical thinking questions on salt hydrolysis material using the wondershare quiz creator application. This research is a Research and Development with the Plomp model. The research subjects are 20 students and 2 chemistry teachers in a small-scale trial. The instruments used are critical thinking questions, material expert validation sheets, media expert, and response questionnaires for teachers and students. Based on the results of the validation of questions by the material, evaluation, language, and practitioner experts, the validation results have a score of 90% for the material aspect, 96% for the construction aspect, and 94% for the language aspect with a category of Valid. For the results from the media expert are 90% on content substance aspect, 95% on learning design aspect, and 92% on display aspect with a category of Valid. As for the result of the small-scale trial of student responses, it obtained the score of 87% in the “very good” category. While the result of the teacher responses obtained the score of 87.92% in the category of “very good” as well. Based on these results, critical thinking questions on hydrolysis material are valid to be used as an instrument for assessing critical thinking ability.
Analisis lokasi rawan banjir berdasarkan faktor fisik Kabupaten Mamuju Risma Risma
JNANALOKA Vol. 03 No. 02 September Tahun 2022
Publisher : Lentera Dua Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36802/jnanaloka.2022.v3-no2-75-85

Abstract

Mamuju Regency is the capital city of West Sulawesi Province and is one of the districts that are prone to flooding. This study aims to analyze flood-prone locations based on the physical condition of Mamuju Regency which includes rainfall, slope, elevation, soil type, river buffer and land use. The results showed that there is an area of 279.84k㎡ in Mamuju Regency which has a high vulnerability to flooding. Areas that have a high level of flood vulnerability are mostly located in the western part of Mamuju Regency because the land cover is dominated by settlements and ponds and has a relatively flat topography. Meanwhile, areas with moderate and low levels of flood vulnerability are 1695.47k㎡ and 2959.33k㎡, respectively.
Aplikasi sistem informasi geografis untuk pemetaan kerentanan kuantitas mata air dan pengaruhnya terhadap budidaya kopi di Kecamatan Grabag, Kabupaten Magelang. Cherlin Rian Rosalia; Muchlis Muchlis; Arie Noor Rakhman
JNANALOKA Vol. 03 No. 02 September Tahun 2022
Publisher : Lentera Dua Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36802/jnanaloka.2022.v3-no2-87-97

Abstract

The springs in Grabag Sub-district have decreased the quantity of water because of a large amount of water taken from the springs by the residents and PDAM. This can threaten the volume of existing springs. This study aims to analyze the quantity vulnerability of the spring area and identify the conservation in the management of springs in the study area by using a Geographic Information System (GIS) application. The data used is the observation of data in the field and laboratory. Data as soil type, morphometry, constituent lithology, land use, vegetation, water discharge, access, and use of water. We classify the vulnerability of springs in the study area as low - medium vulnerability. Areas of low vulnerability, vulnerability class 2.0–2.6 are scattered in the springs of Tuk Ngrancah, Tuk Tlogosari, Tuk Gedad, and Tuk Tlogorejo. This area is composed of colluvial deposits of regosol soil, low rainfall (1750–2250 mm/year), sloping slopes (9-15°), and they used the land as gardens. Medium classification areas, with vulnerability class 2.7–3.3 spread over the springs of Tuk Bleder, Tuk Mas Kalimas, Tuk Kembar, and Tuk Udal. This area is composed of colluvial deposits of latosol soil, moderate rainfall (2250-2750 mm/year), undulating slopes (16-25°), and land use as gardens. The direction of spring conservation techniques is as agronomic conservation techniques with vegetative methods. The application of this method to springs with low vulnerability classification is the use of bamboo (Bambusa sp.) as a ground cover plant. Coffee liberika (Coffea liberika) together with lamtoro (Leucaena leucochephala) and sugar palm (Arenga pinnata) were directed to springs with moderate susceptibility classification. The existence of agro-tourism land through coffee cultivation is the direction of agronomic conservation techniques in Grabag District. 

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