E-Jurnal Universitas Muhammadiyah Palembang
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GREEN SYNTHESIS NANOPARTIKEL GRAPHENE DENGAN AGEN PEREDUKSI URIN MANUSIA DAN APLIKASINYA SEBAGAI ADITIF BIONANOLUBRICANT BERBASIS CPO (CRUDE PALM OIL)
Get PDFGraphene is a nanomaterial that has been widely applied to various fields because of the uniqueness of the material, therefore this material is very interesting to be developed as an additive in lubricant. This study aims to determine the optimum additive weight ratio and obtain optimum operating conditions in the graphene dispersion process in base oil. This research is divided into 2 stages: preliminary research and main research. The preliminary study aims to transform the chemical structure of crude palm oil (CPO) through a three-stage reaction into a polyol as a base oil. The main research is the process of making bionanolubricant. Graphene is synthesized using a combination technique with a human urine as reducing agent. The formulations are known by varying the weight of the additive and the time of the dispersion. Variation of additive weight was 0% (A1), 0.25% (B1), 0.5% (C1), 1% (D1) while for dispersion time variation ranged from 0 min (A2), 60 min (B2), 90 minutes (C2) and, 120 minutes (D2). Based on the SEM-EDX test results, the SEM image formed graphene and spectrum layers on EDX show that the oxide in graphene has been successfully reduced. Bionanolubricant was tested for quality with 7 parameters. The composition of base oil formula 250 gr and graphene nanoparticles 0.5% w / w is the optimum additive weight ratio for C1 sample code whereas the economical dispersion time is 60 minutes. The result of the viscosity index test is 121,72, its pour point is 10,4oC, flash point equal to 228oC with lubrication capability tested through four ball tester got scar diameter equal to 0,87 mm. This Bionanolubricant belongs to the SAE 250 class and is classified as a GL-4 lubricant based on the quality level of API (American Petroleum Institute) performance test
ANALISA PENULANGAN KONSTRUKSI GEDUNG SATU BASEMEN EMPAT LANTAI
Get PDFBased on the artifact drawing in the appendix, it discusses structural planning where only drawings are produced in planning and there is no reinforcement plan which is an important element in the construction of a building in order to produce a strong, safe and economical building. Therefore, the author discusses the reinforcement of the structure. To achieve the planning objectives, structural planning must follow the regulations set by the government in the form of the Indonesian National Standard (SNI). Planning of the building that has been determined so that the strength and safety factors of the building can be achieved and there is no collapse in the planned building. The results of the analysis of a four-story basement office building from the calculations obtained the same results in calculations using the SAP 2000 and SNI programs 03-2847-2002, therefore the reinforcement obtained is accurate, namely the results of the SAP 2000 and SNI programs 03-2847-2002 . The results of planning a four-storey office building from several planned variations obtained a total net concrete area, namely variation 1 of 14800.96 cm², variation 2 of 15172.1 cm², variation 3 of 11297.69 cm² and variation 4 experiencing structural failure. From these results it can be concluded that the safe and economical variations of beams, columns are variation 3 where the dimensions are B1 (30 cm x 40 cm), B2 (15 cm x 25 cm), K1 (50 cm x 50 cm), K2 (45 cm x 45 cm), K3 (40 cm x 40 cm), K4 (35 cm x 35 cm
PENGARUH PENAMBAHAN ABU CANGKANG KERANG HIJAU DAN ZAT ADIKTIF SUPERPLASTICIZER SEBAGAI BAHAN TAMBAH CAMPURAN SEMEN TERHADAP KUAT TEKAN BETON K-400
Get PDFIn thisistudy, the authors took green shell ash and superplasticizer addictive substances as additives in the concrete mixture. This studyiintends to determine the effect of using green shell ash and superplasticizer addictive substances on the compressive strength of concrete K-400. Green shell ash and superplasticizer addictive substances are additives used in concrete mix materials. The total number of test objects in this study were 36 samples, each 9 samples of specimens in 4 variations, namely normal concrete, normal concrete + green shell ash 3% and the addictive substance superplasticizer 1%,inormal concretei+ shell ash green 3% and superplasticizer 2% addictive substance, and normal concrete + green shell ashes 3% and superplasticizer 3% addictive substance. After the addition of green clamshell ash and superplasticizer addictive substance, a compressive strength test of the concrete was carried out, with the obtained characteristic concrete quality on the addition of 3% green clamshell ash and 1% superplasticizer addictive substance, the concrete compressiveistrength value was 403.72 kg/cm2 at the age of 28 days. On the addition of green clamshell ash 3% and 2% superplasticizer addictive substance, the concrete compressive strength value was 411.78 kg/cm2 at the age of 28 day. On the addition of green shell ash 3% and superplasticizer 3% addictive substance, the concrete compressive strength value was 425.48 kg/cm2 at the age of 28 day
Analisa Efesiensi Bahan Bakar Dan Dampak Lingkungan Emisi Gas Buang Pembangkit Listrik Tenaga Diesel (Pltd) Terhadap Pembangkit Listrik Mesin Gas (PLTMG)
Get PDFThe need for electrical energy is a primary human need at this time, the need for electricity is almost a necessity for both industry, offices, and the general public. The main problem of the power generation industry today is the use of oil as fuel for power generation which will increase the cost of electricity production. One of the government's efforts to reduce the use of fuel oil is to use oil fuel with the consideration that natural gas is more effective and efficient, its use is more practical and its emissions are more environmentally friendly when compared to solar power. From these problems arose the idea of calculating the efficiency between a diesel-fired power plant (PLTD) and a gas engine power plant (PLTMG) powered by LNG (Liquedfied Natural Gas) and the resulting emission measurement results. The study conducted an efficiency analysis by carrying out a 50% and 75% load test of installed capacity and analyzing its environmental friendliness by taking the emission test results
KAJIAN LINGUISTIK FORENSIK DALAM KOMENTAR POSTINGAN KASUS N.S. GAMBUS PADA MEDIA SOSIAL FACEBOOK
Get PDFLatar belakang penelitian ini adalah ada gejala yang ramai membicarakan tentang kasus N.S Gambus yang menyebabkan keriupan masyarakat atas sikapnya yang tidak sesuai antara penampilan dan perbuatannya. Penelitian ini bertujuan untuk menemukan atau mengkaji pelanggaran dalam penggunaan bahasa pada media sosial facebook pada komentar postingan terkait kasus N.S. Gambus tahun 2021 yang mengandung makna kata/kalimat merendahkan, menodai dan merugikan nama baik orang lain yang dapat menyebabkan adanya tindak hukum pidana. Metode dalam penelitian ini menggunakan metode deskriptif kualitatif. Data dikumpulkan dengan menggunakan Teknik simak dan catat. Hasil penelitian menunjukkan bahwa bentuk tindak tutur yang merendahkan terdapat 57 data tuturan, tindak tutur menodai terdapat 34 data tuturan, dan tindak tutur merugikan terdapat 9 data tuturan. Bentuk tindak tutur yang paling banyak ditemukan di komentar facebook terkait kasus N.S Gambus yaitu tindak tutur merendahkan. Gejala tutur seperti ini tentu memiliki interpretasi tersendiri atas karakter masyarakat yang berkomentar di media sosial. Sementara itu tindak tutur paling sedikit yaitu tindak tutur yang merugikan
PEMBELAJARAN FONETIK BAHASA INDONESIA PADA MAHASISWA ASAL NUSA TENGGARA TIMUR DI UNITRI MALANG
Get PDFPenelitian ini didasarkan pada beberapa persoalan berbahasa di kalangan mahasiswa Unitri asal Nusa Tenggara Timur (NTT) khususnya pada kompetensi berbicara. Permasalahan pada penelitian ini adalah bagaimana pengucapan kata yang tepat dan sesuai dengan fonetik simbol Bahasa Indonesia. Tujuan penelitian ini adalah untuk memberi pembelajaran kepada mahasiswa dalam memahami simbol-simbol fonetik, sehingga mengantarkan mahasiswa dapat mengucapkan kata-kata dalam Bahasa Indonesia yang benar. Untuk mendapatkan kompetensi yang sesuai, peneliti melakukan langkah pembelajaran sebagai berikut. Pertama pengajaran pelafalan dengan materi membaca dan menuliskan simbol fonetik, kedua mengumpulkan respon mahasiswa terhadap proses pembelajaran pengucapan. Penelitian ini menggunakan pendekatan kualitatif, dengan observasi digunakan untuk mengumpulkan beberapa informasi tentang pengucapan. Instrumen yang digunakan untuk mengumpulkan dokumen-dokumen yang berhubungan dengan data pengucapan didokumentasi dan dibuat dalam bentuk modul. Kuesioner digunakan untuk mendapatkan persepsi mahasiswa dalam proses belajar mengajar pada pelatihan pembelajaran fonetik Bahasa Indonesia. Hasil penelitian ini menunjukkan bahwa proses pembelajaran simbol fonetik pada mahasiswa asal Nusa Tenggara Timur di UNITRI telah ditunjang oleh modul dan media yang digunakan adalah video pembelajaran, serta zoom. Metode yang digunakan adalah metode langsung atau alami, teknik yang diterapkan di kelas daring adalah teknik membaca dengan keras. Evaluasi pelatihan pembelajaran ini diambil pada minggu kedua dengan memberikan tes tertulis.
PEMBELAJARAN TEKS DESKRIPSI BERBASIS PENDEKATAN MIKiR PADA SISWA KELAS VII SMP NEGERI MUARO JAMBI
Get PDFTujuan penelitian yaitu untuk mendeskripsikan pembelajaran teks deskripsi berbasis pendekatan MIKiR pada siswa kelas VII di salah satu SMP Negeri Muaro Jambi. Pembelajaran teks deskripsi berbasis MIKiR meliputi merancang, pelaksanaan, dan penilain yang dilaksanakan oleh pendidik ataupun peserta didik. Penelitian ini menggunakan metode kualitatif dengan pendekatan studi kasus. Data penelitian meliputi RPP, skenario, media, dan LKPD MIKiR. Sumber penelitian yaitu informan yang dapat memberikan data meliputi pendidik dan peserta didik. Informan/partisipan dipilih dengan menggunakan teknik purposeful sampling berdasarkan karakteristik individu yaitu pendidik dan peserta didik. Pengumpulan data dilakukan dengan analisis data, wawancara mendalam, dan observasi. Teknik analisis data meliputi kegiatan mengorganisasikan data, memoing, mengklasifikasikan dan menfasirkan data menggunakan open coding, axial coding, dan selective coding. Penyajian data dideskripsikan sesuai dengan tema. Hasil penelitian pembelajaran teks deskripsi MIKiR meliputi kegitan merancang skenario, RPP, media, dan LKPD, pelaksanaan pembelajaran berdasarakan aktivitas pendidik dan peserta didik seperti unsur mengalami peserta didik mengamati teks, unsur interaksi peserta didik berdiskusi, unsur komunikasi peserta didik menampilkan hasil kerja, dan unsur interaksi peserta didik memberikan kesimpulan tentang struktur teks deskripsi, serta penilaian pembelajaran menggunakan penilaian diagnostik. Hasil penelitian dapat dijadikan dasar penguatan pembelajaran teksdeskripsi berbasis MIKiR di SMP
POTRET ISLAM DALAM NOVEL JEJAK LANGKAH DENGAN PENDEKATAN TEOLOGI PEMBEBASAN SERTA RELEVANSINYA PADA PENDIDIKAN KARAKTER
Get PDFTujuan penelitian ini adalah mendeskripsikan Islam dalam novel Jejak Langkah karya Pramoedya Ananta Toer serta relevansinya pada pendidikan karakter. Potret Islam dalam novel tersebut dikaji dan ditarik relevansinya pada konsep pendidikan karakter di Indonesia. Teori yang digunakan dalam melihat fenomena Islam adalah teori Teologi Pembebasan. Pada perspektif ini Islam dipahami sebagai suatu ideologi dan gerakan sosial yang melakukan perlawanan terhadap ketidakadilan. Islam yang disebutkan Islam yang tidak terkait dengan salat dan zikir namun tidak melakukan sembahyangan untuk membela yang susah dan melawan kezaliman. Penelitian ini menggunakan studi pustaka, pengumpulan data dilakukan dengan teknik dokumentasi, membaca dan mencatat, data yang diperoleh dianalisis dengan teknik deskriptif kualitatif. Hasil penelitian ini mengedepankan perjuangan yang kuat serta mengangkat persoalan realitas sosial. Islam menjadi agam yang rahmat bagi semua alam serta relevan untuk segala zaman
TEACHING EXTENSIVE LISTENING IN EFL CLASSROOM USING WEBSITE WWW.ER-CENTRAL.COM
Get PDFThe COVID 19 pandemic has affected living systems around the world; one of them is in the education system. It has led to the complete closure of schools, universities and colleges around the world. In response to this situation, many schools, universities and colleges are encouraged to use distance learning programs and open education applications and platforms in which schools and teachers can use these platforms to reach students remotely and limit educational interruptions. In this research, the website (www.er-central.com) was used as one of the distance learning programs for extensive listening by EFL students. This research aims to determine whether there is an effect of websites used by English language learners on the global spread of the COVID 19 pandemic. In this research, the reserchers used quantitative research in pre-experimental method design using one group of pre-tests and post-tests.. In pre-experimental research design, the researcher used concept one group Pre-test and Post-test for the third semester in university. The result of the data analysis indicated that there was significant difference of student’ test before and after being taught by using website. It can be said that there is a significant difference of student’s score after the treatment. It means that the website used is effective and can be used as a distance learning program for extensive listening in pandemic situations
READINESS TO LEARN: PRINCIPLES. CONTRIBUTING FACTORS AND HOW IT AFFECTS LEARNING
Get PDFThis study attempts to inform definition of learning readiness, the principle of readiness, factors contributing to readiness to learn and how readiness affects learning. This study is theory-based research or library research.This study used secondary data. The technique used for collecting the data is literature study. This study concludes that the principles of readiness are not only affected by one’s physical development but also his/ her mental development since they are closely interrelated. Moreover, the suitability of the learning experiences that will be given or the existing (prior) experiences become crucial to result in learning readiness and simultaneously , and the adaptation process of basic readiness for certain activities is considered as a natural thing when it is in the formation period at the time of development .Factors contributing to readiness to learn are maturation ,Intelligence, and motivation and readiness can generate active self directed learner, improve learning outcome/achievements.grow responsibility in learning ,and influence students’ activeness in learning.