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All Journal Justek : Jurnal Sains Dan Teknologi CHEESA: Chemical Engineering Research Articles AXIOM : Jurnal Pendidikan dan Matematika MAJAMATH: Jurnal Matematika dan Pendidikan Matematika Sang Pencerah: Jurnal Ilmiah Universitas Muhammadiyah Buton Jurnal Review Pendidikan dan Pengajaran (JRPP) JURNAL ANALIS LABORATORIUM MEDIK Jurnal Riset Teknologi Pencegahan Pencemaran Industri REACTOR : Journal of Research On Chemistry And Engineering Jurnal Pendidikan dan Teknologi Indonesia Jurnal Pengabdian Kepada Masyarakat Jurnal Sains dan Teknologi Journal of Engineering Science and Technology International Journal of Applied Research and Sustainable Sciences (IJARSS) Jurnal Pengabdian Masyarakat dan Riset Pendidikan
Dimas Frananta Simatupang
Program Studi Teknik Kimia, Politeknik Teknologi Kimia Industri Medan
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SIGNIFIKANSI HASIL BELAJAR MAHASISWA VOKASI TERHADAP MATA KULIAH MATEMATIKA TEKNIK DENGAN PEMBELAJARAN DARING DAN LURING Sitinjak, Anna Angela; Simatupang, Dimas Frananta
AXIOM : Jurnal Pendidikan dan Matematika Vol 12, No 1 (2023)
Publisher : Universitas Islam Negeri Sumatera Utara Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30821/axiom.v12i1.11547

Abstract

Masa pandemi Covid-19 memberikan dampak terhadap pendidikan, namun segera diberikan solusi yaitu diberlakukannya pembelajaran daring (dalam jaringan), yang pada awalnya sangat menarik bagi mahasiswa, namun dengan adanya berbagai kendala yang dihadapi membuat masyarakat memiliki dua pandangan yang berbeda yaitu ada yang setuju terhadap metode pembelajaran daring dan ada juga yang menginginkan pembelajaran luring (luar jaringan). Tujuan penelitian ini adalah untuk mengetahui bagaimana hasil belajar mahasiswa vokasi khususnya mahasiswa politeknik jenjang diploma tiga dengan kedua teknik pembelajaran tersebut dan apakah terjadi perbedaan antara keduanya. Jika terjadi perbedaan, akan dilihat mana yang lebih tinggi hasil belajarnya sehingga dapat dijadikan referensi bagi pemangku jabatan dalam menjawab sistem pendidikan online dapat digunakan atau tidak pada pendidikan vokasi. Metode penelitian yang digunakan dalam penelitian ini adalah quasi-eksperimen yang terdiri dari 2 kelompok dengan jumlah mahasiswa setiap kelompok sebanyak 39 orang yang diambil dengan teknik cluster random sampling. Data penelitian kemudian dianalisis lebih lanjut dengan uji normalitas dan homogenitas. Kemudian dilakukan uji-t untuk melihat perbedaan keduanya secara signifikan. Hasil penelitian menunjukkan bahwa hasil belajar dengan teknik pembelajaran luring lebih tinggi daripada hasil metode pembelajaran daring, dengan nilai thitung (0,237) > ttabel (0,223). Hal ini dapat disimpulkan bahwa secara statistik terdapat perbedaan antara teknik pembelajaran luring dan daring pada mata kuliah matematika teknik di pendidikan vokasi. AbstractThe Covid-19 pandemic had an impact on education, but a solution was immediately given, namely the implementation of online learning (distance learning), which was initially very attractive to students, but with the various obstacles, the community had two different views, namely, those who prefer online learning methods and those who prefer offline learning (face-to-face classroom). The purpose of this study was to find out the learning outcomes of vocational students, especially polytechnic students in the D3 level (a level three diploma), learning through online and offline classes and whether there are differences between the two ways of learning. If there is a difference, it will be seen which has better learning outcomes so that it can be used as a reference for stakeholders in deciding whether the online education system can be used or not in vocational education. This study follows a quasi-experimental method consisting of 2 groups with a total of 39 students in each group taken using a cluster random sampling technique. The research data were then analyzed further with normality and homogeneity tests. Then a t-test was carried out to see a significant difference between the two. The results of the study show that learning outcomes with offline learning techniques are better than those of online learning methods, with t-count (0.237) > t-table (0.223). It can be concluded that statistically there are differences between offline and online learning techniques in engineering mathematics courses in vocational education.
Determination of Sodium Sulfate Requirement for Obtaining Sodium Sulfide Content in Green Liquor at the Recovery Boiler Unit in PT XYZ North Sumatra Donda; Paranita, Darni; Simatupang, Dimas Frananta
International Journal of Applied Research and Sustainable Sciences Vol. 1 No. 4 (2023): December 2023
Publisher : MultiTech Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59890/ijarss.v1i4.937

Abstract

Black liquor is a residual cooking liquid containing organic chemicals utilized as fuel in the recovery boiler and inorganic chemicals that can be recovered into cooking liquid through the recovery boiler process. The recovery boiler is a specialized boiler unit used to restore black liquor by reducing sodium sulfate into sodium sulfide. The research method involved field observations, liquor content analysis, and stoichiometric calculations to determine the sodium sulfate requirement. The calculations revealed that the sodium sulfide content obtained from the recovery boiler process in green liquor was 24.428 g/l Na2O, requiring a reactive amount of 46,5225.0328 kg/day of sodium sulfate. The target sodium sulfide content in the green liquor aimed for was 18-30 g/l. The results indicated that the sodium sulfide content has met the predetermined target and can be utilized for subsequent processes.
Fabrication of Biobriquettes from Mixture of Palm Fronds and Palm Shells with Varying Binders of Tapioca and Sago Flour Simatupang, Dimas Frananta; Simbolon, Merta
International Journal of Applied Research and Sustainable Sciences Vol. 1 No. 4 (2023): December 2023
Publisher : MultiTech Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59890/ijarss.v1i4.1062

Abstract

Biobriquettes are products obtained from the compaction process of biomass residue used as fuel and formed by using a binding agent. In this study, the biomass used comprised palm fronds and palm shells. The objective was to determine the characteristics of biobriquettes. The research methodology adopted was quantitative experimentation. Results showed that the highest calorific value of biobriquettes was 6729.92 cal/g (1:3-sago 15%), the lowest moisture content was 1.1168% (1:3-tapioca 10%), the lowest ash content was 9.5232% (1:3-sago 10%) and the highest density was 0.9927 g/cm3 (1:3-tapioca 20%). Based on the test results, it can be concluded that the optimal ratio of raw materials palm fronds to palm kernel shells for biobriquette fabrication is 1:3 with 10% tapioca flour and 10-15% sago flour as binders.
Calculation of Impurity Levels in SIR 3CV Type Rubber and Mass Balance at the Drying Station in PT. XYZ North Sumatera Tarigan, Ratna Kristina; Simatupang, Dimas Frananta
International Journal of Applied Research and Sustainable Sciences Vol. 2 No. 1 (2024): January 2024
Publisher : MultiTech Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59890/ijarss.v2i1.1253

Abstract

The quality of latex significantly affects the quality level of rubber produced, with one of its parameters being the impurity level, with a standard value of 0.03%. The impurity level strongly influences the rubber quality, where higher impurity levels correspond to lower rubber quality, and vice versa. The research method employed was experimental and calculation using mass balance. The calculated results indicated impurity levels in the rubber as follows: 0.0059%, 0.0069%, 0.0074%, 0.0419%, 0.0054%, 0.0429%, and 0.0444%. The average total impurity level was 0.0219%. However, some rubber samples did not meet quality standards due to contaminated tapping equipment, inadequate washing processes, and damaged filtration tools. In the mass balance at the drying station, the first input material was 125 kg/hour with a water component balance of 50%, HAS (Hevea Acidic Solution) 12%, SMBS (Sodium Metabisulfite) 8%, and latex 30%. The second input material is 18.75 kg/hour, consisting of 100% steam. The output material at the drying station is 143.75 kg/hour, with a water component balance of 43.47%, HAS 10.43%, SMBS 6.95%, latex 26.08%, and steam 13.07%.
Red Palm Oil from Crude Palm Oil Refinement Using The Acid Degumming Method Saputra, Hendra; Rantawi, Azhar Basyri; Siregar, Ahdiat Leksi; Rahardja, Istianto Budhi; Simatupang, Dimas Frananta
International Journal of Applied Research and Sustainable Sciences Vol. 2 No. 6 (2024): June 2024
Publisher : MultiTech Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59890/ijarss.v2i6.1957

Abstract

Red Palm Oil (RPO) is the result of refining Crude Palm Oil (CPO). In further processing to obtain cooking oil, several processes are undergone to produce a clear oil, which is very different from its original product, CPO. RPO is rich in beta-carotene and its refining process does not include bleaching. The production of RPO utilizes the acid degumming method with different acid variations, namely phosphoric and sulfuric acid, with varying concentrations of 0.05% and 0.075%. The results showed that the average percentage of RPO produced reaches 44.05%. Furthermore, the quality analysis of RPO also meets the SNI-3741-1995 standards (quality standard of cooking oil), with the average of free fatty acid value of 1.41% (max 3%), peroxide value of 1.04 mg oxygen/100 g (max 1.6 mg oxygen/100 g), and moisture value of 0.04% (max 0.3%).
ANALISIS TINGKAT KEMAMPUAN PEMECAHAN MASALAH PESERTA DIDIK KELAS X SMA PADA MATERI SUHU DAN KALOR Simbolon, Merta; Jua, Selestina Kostaria; Simatupang, Dimas Frananta
Jurnal Review Pendidikan dan Pengajaran Vol. 7 No. 2 (2024): Volume 7 No. 2 Tahun 2024
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jrpp.v7i2.26781

Abstract

Penelitian ini bertujuan untuk menganalisis tingkat kemampuan pemecahan masalah peserta didik SMA pada materi suhu dan kalor. Subjek penelitian ini adalah peserta didik kelas X salah satu SMA di kota Merauke yang berjumlah 30 orang. Metode yang digunakan dalam penelitian ini bersifat deskriptif dan data diperoleh dengan memberikan instrumen berupa tes kemampuan pemecahan masalah. Adapun instrumen yang digunakan adalah instrumen kemampuan pemecahan masalah berbasis multimodus representasi Rosengrant yang telah dikembangkan peneliti dan telah diuji validitas dan reliabilitasnya sehingga dinyatakan layak untuk digunakan sebagai instrumen tes. Selain itu, wawancara juga dilakukan terhadap guru sebagai data pendukung. Hasil yang diperoleh menunjukkan bahwa tingkat kemampuan pemecahan masalah peserta didik pada tahap 1 dan tahap 4 lebih baik daripada tahap 2 dan tahap 3.
Co-Authors Agrifa, Utami Nanda Ahdiat Leksi Siregar Azhar Basyir Rantawi Darni Paranita Derry CS Purba Donda Donda, Donda Ginting, Maulidna Hendra Saputra Hendra Saputra Ing Mayfa Situmorang Jua, Selestina Kostaria Martin Siahaan Merta Simbolon Nelza, Novia Nuranika Nuranika Oktavia, Rahma Yusni Paranita, Darni Purba, Switamy A. Rahardja, Istianto Budhi Rahma Yusni Oktavia Ramadhani Ramadhani Rantawi, Azhar Basyri Ratna Kristina Tarigan Ratna Kristina Tarigan Saragih, Gimelliya Sebayang, Mariani Sidabutar, Naqasya Asyrori Sihaloho, Erwin Dani Winata Simbolon, Merta Siregar, Ahdiat Leksi Sitepu, Evi Christiani Sitinjak, Anna Angela Soherawati Rospa Ginting Switamy Angnitha Purba Tampubolon, Ferdinan Rinaldo Tarigan, Ratna Kristina Wiranda Panggabean Yunianto Yunianto Yunianto