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Ahmed FE, Lalia BS, Hashaikeh R, Hilal N. 2020. Alternative heating techniques in membrane distillation: A review. Desalination. 496(September):114713. doi:10.1016/j.desal. 2020.114713.Alkhudhiri A, Darwish N, Hilal N. 2012. Membranedistillation: A comprehensive review. Desalination. 287(January):2– 18. doi:10.1016/j.desal.2011.08.027.Baksir A, Daud K, Wibowo ES, Akbar N, Haji I. 2019. Halmahe- ra , North Maluku Province. 22.Blanco Gálvez J, García-Rodríguez L, Martín-Mateos I. 2009. Seawater desalination by an innovative solar-powered membranedistillation system: the MEDESOL project. De- salination. 246(1-3):567–576. doi:10.1016/j.desal.2008.12.005.Flexer V, Baspineiro CF, Galli CI. 2018. Lithium recovery from brines: A vital raw material for green energies with a po- tential environmental impact in its mining and proces- sing. Science of The Total Environment. 639:1188–1204. doi:10.1016/j.scitotenv.2018.05.223.H Tangkas IWCW, Astuti W, Sutijan, Sumardi S, Petrus HTBM. 2021. Lithium titanium oxide synthesis by solid-state re- action for lithium adsorption from artificial brine source. IOP Conference Series: Earth and Environmental Scien- ce. 882(1):012005. doi:10.1088/1755-1315/882/1/012005.Hartono M, Astrayudha MA, Petrus HT, Budhijanto W, Sulis- tyo H. 2017. Lithium recovery of spent lithium-ion battery using bioleaching from local sources microorganism. Ra- sayan Journal of Chemistry. 10(3):897–903. doi:10.7324/ RJC.2017.1031767.Joko S. 2020. Makalah ilmiah. 15:89–100.Li Q, Omar A, Cha-Umpong W, Liu Q, Li X, Wen J, Wang Y, Ra- zmjou A, Guan J, Taylor RA. 2020. The potential of ho- llow fiber vacuum multi-effect membrane distillation for brine treatment. Applied Energy. 276(June):115437. doi: 10.1016/j.apenergy.2020.115437.Li X, Mo Y, Qing W, Shao S, Tang CY, Li J. 2019. Membrane- based technologies for lithium recovery from water lithi- um resources: A review. Journal of Membrane Science. 591(January):117317. doi:10.1016/j.memsci.2019.117317.Mustika PCBW, Astuti W, Sumardi S, Petrus HTBM, Sutijan. 2022. Separation Characteristic and Selectivity of Lithi- um from Geothermal Brine Using Forward Osmosis. Jo- urnal of Sustainable Metallurgy. doi:10.1007/s40831-022-00602-z.Natasha NC, Lalasari LH, Miftakhur R, Sudarsono JW. 2018. Ekstraksi Litium dari β – Spodumen Hasil Dekomposisi Batuan Sekismika Indonesia Menggunakan Aditif Natri- um Sulfat.Prawira J. 2017. Karakteristik Membran dan Pengaruhnya Ter- hadap Kinerja Proses Distilasi Membran. Delft University of Technology. 3(1):0–11. doi:10.5281/zenodo.1134034.Purnomo BJ, Pichler T. 2014. Geothermal systems on the is- land of Java, Indonesia. Journal of Volcanology and Geo- thermal Research. 285:47–59. doi:10.1016/j.jvolgeores.2 014.08.004.Roobavannan S, Vigneswaran S, Naidu G. 2020. Enhan- cing the performance of membrane distillation and ion- exchange manganese oxide for recovery of water and lithium from seawater. Chemical Engineering Journal. 396(May):125386. doi:10.1016/j.cej.2020.125386.Setiawan FA, Rahayuningsih E, Petrus HTBM, Nurpratama MI, Perdana I. 2019a. Kinetics of silica precipitation in geo- thermal brine with seeds addition: minimizing silica sca- ling in a cold re-injection system. Geothermal Energy. 7(1). doi:10.1186/s40517-019-0138-3.Setiawan H, Petrus HTBM, Perdana I. 2019b. Reaction kineti- cs modeling for lithium and cobalt recovery from spent lithium-ion batteries using acetic acid. International Journal of Minerals, Metallurgy, and Materials. 26(1):98– 107. doi:10.1007/s12613-019-1713-0.Siekierka A, Tomaszewska B, Bryjak M. 2018. Lithium cap- turing from geothermal water by hybrid capacitive deio- nization. Desalination. 436(February 2018):8–14. doi: 10.1016/j.desal.2018.02.003.Sujoto VSH, Sutijan, Astuti W, Mufakhir FR, Petrus HTBM. 2021. Lithium recovery from synthetic geothermal bri- ne using electrodialysis method. IOP Conference Seri- es: Earth and Environmental Science. 882(1):012003. doi: 10.1088/1755-1315/882/1/012003.Sujoto VSH, Sutijan, Astuti W, Sumardi S, Louis ISY, Petrus HTBM. 2022. Effect of Operating Conditions on Lithium Recovery from Synthetic Geothermal Brine Using Ele- ctrodialysis Method. Journal of Sustainable Metallurgy. 8(1):274–287. doi:10.1007/s40831-021-00488-3.Sutijan S, Wahyudi S, Ismail MF, Mustika PCB, Astuti W, Prase- tya A, Petrus HTBM. 2022. Forward osmosis to concentra- te lithium from brine: the effect of operating conditions (pH and temperature). International Journal of Techno- logy. 13(1):136. doi:10.14716/ijtech.v13i1.4371.Zhang Y, Peng Y, Ji S, Li Z, Chen P. 2015. Review of thermal effi- ciency and heat recycling in membrane distillation pro- cesses. Desalination. 367:223–239. doi:10.1016/j.desal.20 15.04.013.Zhao K, Heinzl W, Wenzel M, Büttner S, Bollen F, Lange G, He- inzl S, Sarda N. 2013. Experimental study of the memsys vacuum-multi-effect-membrane-distillation (V-MEMD) module. Desalination. 323:150–160. doi:10.1016/j.desal. 2012.12.003.

The processing of mining products in indonesia has not been utilized optimally. One of them is manganese ore. Way kanan is one of indonesia's potential manganese ore sites. The manganese leaching study used a -200 mesh way kanan manganese ore that was reacted with sulfuric acid at concentrations of 0.1 M, 0.5 M, and 1 M, as well as corncob as a reductant. To separate the dissolved iron in the leaching process, the manganese sulfate solution was purified with sodium hydroxide and then filtered to have a manganese sulfate solution free of iron. Manganese was precipitated using oxalic acid. The manganese oxalate precipitation was calcined at a temperature of 350 °c for two hours. The best manganese extraction obtained at 92.3% was at a sulfuric acid concentration of 1 M, a temperature of 80 °c, and a solution volume of 400 ml. Calcination of manganese oxalate converted the material into hausmannite (Mn3O4).

Sintesis nanopartikel ZnO dari limbah industri baja telah dilakukan menggunakan metode hidrotermal. Penelitian ini bertujuan untuk mengetahui pengaruh suhu (120, 150 dan 200°C) dan waktu pemanasan (1, 3, dan 6 jam) terhadap komposisi kimia, struktur kristal, ukuran partikel dan morfologi dari produk ZnO yang dihasilkan. Karakterisasi yang digunakan ialah Inductively Coupled Plasma-Optical Emission Spectrometry (ICP-OES), X-Ray Fluoresence (XRF) X-Ray Diffraction (XRD) dan Scanning Electron Microscopy (SEM). Proses hidrotermal menghasilkan produk nanopartikel dengan kemurnian tinggi dan ukuran partikel < 100nm dengan suhu hidrotermal yang optimum adalah 150oC selama waktu penahanan 3 jam. Dari hasil karakterisasi XRF diketahui bahwa kadar Zn adalah yang paling dominan yaitu sebesar 98,434%. Selanjutnya, pada karakterisasi XRD diperoleh fasa murni ZnO yaitu zincite dengan nilai 2θ sebesar 36,23° dan ukuran partikel sebesar 33,36 nm dengan morfologi yang terbentuk batang heksagonal (nanorods) seperti yang diperoleh pada karakterisasi FE-SEM.

Penelitian ini bertujuan untuk mengetahui perbedaan orientasi masa depan terkait pernikahan pada wanita bekerja dan wanita tidak bekerja. Penelitian ini menggunakan pendekatan kuantitatif dengan jenis komparatif. Analisis yang digunakan dalam penelitian ini menggunakan uji-t untuk melihat apakah ada perbedaan orientasi masa depan terkait pernikahan pada wanita bekerja dan wanita tidak bekerja. Penelitian ini menggunakan teknik non probability sampling. Jumlah subjek dalam penelitian ini adalah tujuh ratus lima puluh lima orang wanita wanita bekerja dan wanita tidak bekerja. Hasil penelitian terdapat perbedan orientasi masa depan terkait pernikahan pada wanita bekerja dan wanita tidak bekerja dilihat berdasarkan hasil uji hipotesis 0,031. Terdapat selisih nilai yang terlihat ialah dimana wanita bekerja berkategori rendah sedangkan wanita tidak bekerja berkategori tinggi. Hal tersebut dikarenakan wanita bekerja walaupun sudah memiliki pasangan tetap saja menganggap pernikahan bukanlah prioritas utama dalam hidupnya. Sedangkan, Wanita tidak bekerja walaupun belum memiliki pasangan tetapi mereka sudah memiliki gambaran akan pernikahan nantinya.

Penelitian ini bertujuan untuk melihat bagaimana kondisi perencanaan karir siswa SMK yang mengalami pembelajaran daring di Masa Pandemi covid 19 ini. Metode yang digunakan dalam penelitian ini adalah metode kuantitatif deskriptif dengan analisis univariate (satu variable) yakni perencanaan karir. Metode pengumpulan data menggunakan skala perencanaan karir yang dimodifikasi dari penelitian yang dilakukan oleh Hidayat (2014). Penelitian ini menggunakan teknik purposive sampling dalam pengumpulan subjek. Subjek dalam penelitian ini memiliki kriteria 1) siswa yang menghadapi sistem pembelajaran daring 2) siswa SMK. Adapun hasil penelitian ini adalah Siswa SMK yang mengalami proses pembelajaran daring selama pandemi covid 19 lebih banyak memiliki perencanaan karir yang rendah. Siswa berjenis kelamin laki-laki maupun perempuan sama-sama memiliki jumlah dan presentase perencanaan karir siswa dengan kategori rendah yang lebih besar. Selain itu siswa berjenis kelamin perempuan memiliki presentase perencanaan karir yang lebih besar daripada siswa dengan jenis kelamin laki-laki dan perempuan juga lebih memiliki persentase perencanaan karir yang lebih tinggi. Pada setiap jurusan siswa yang tergolong pada kategori perencanaan karir rendah lebih banyak daripada tinggi. Siswa paling banyak memiliki kategori rendah pada mengeksplorasi peluang dan mengevaluasi hasil. Selain itu siswa pada kategori tinggi banyak pada aspek menyusun rencana, penilaian diri dan melakukan tindakan.

Salah satu sektor yang terdampak pandemi Covid-19 adalah sektor Pendidikan. SMKN1 Peureulak Timur sebagai satu satunya sekolah menengah kejuruan yang ada di kecamatan Peureulak Timur, Aceh Timur harus tetap memberikan pelayanan Pendidikan bagi seluruh siswa dengan kualitas yang terbaik. Salah satu upaya untuk meningkatkan skill mendidik dan pengajaran bagi Guru SMKN 1 Peureulak Timur dengan mmberikan pelatihan e-learning. Salah satu media elearning yang sering digunakan adalah Goggle Classroom karena fiturnya yang lengkap dan lumayan mudah untuk dioperasikan. Oleh karena itu, kegiatan yang akan dilakukan pada abdimas ini adalah pelatihan Google Classroom. Diharapkan setelah mendapatkan pelatihan Google Classroom ini, Guru SMKN 1 Peureulak Timur dapat meningkatkan performanya dalam menghadapi Revolusi Industri 4.0.

Monosodium glutamate (MSG) is a sodium salt derived from amino acids and glutamic acids. These acids can be found naturally in the body and in the variation of other foods. MSG has the chemical formula C5H8NO4Na-NH2 with the percentage of the main elements contained in MSG including glutamate of 78.2%; Na by 12.2%; and 9.6% H2O and 1 g of monosodium glutamate contains 0.122 Na. MSG also functions as a reagent in extraction processes such as the leaching process under alkaline conditions causing the glutamate to be strongly bound to metal ions and can selectively enrich unwanted elements such as Fe, Al, Mg, and Ca in residual solids. The use of MSG is not currently the optimal which can be an opportunity to develop research on extraction from the leachate process and as an additive in the selective reduction process in the future owing to the sodium content., Periodico di Mineralogia, Vol. 91 No. 2 (2022)

Layout is one of the most important things in a company in designing the needs and facilities that support a business and production process. The purpose of this study was to make a facility layout plan for the trolley assembly practicum at the Production and Manufacturing Systems Laboratory, Universitas Buana Perjuangan Karawang. The method used in this study uses the blocplan algorithm analysis method. Based on the results of the research that has been carried out, making part drawings and operation process charts are used to obtain an accurate and unambiguous description of the geometric features of a component and obtain an overview of the plant layout requirements obtained based on the needs of raw materials, machines, and the efficiency of each operating process and examination, while activity relationship chart analysis, blocplan algorithm analysis and area allocation diagram analysis were used to determine a detailed description or layout template for factory facilities in the hope of optimizing productivity and reducing company losses.

Needs for news information has increased since the change from physical media to online media. News is grouped according to categories to making it easier for readers to get the news as desired. Grouping to determine the category of news information is known as text classification. The number of words in the news text create diversity of words that appear and can be minimized by the stemming process, which is changing an affixed word into its root word. This study comparing between use of stemming and without stemming and finding the best value of K and optimum distance calculation of K-Nearest Neighbor. The best accuracy is 0.9671 which is obtained when stemming algorithm not applied, number of K=9 and cosine distance is used as distance metric. This result is greater than the classification that applies stemming algorithm in condition K=7 using cosine distance which resulted accuracy in 0.9660., Journal of Data Science and Its Applications, Vol 4 No 1 (2021): Journal of Data Science and Its Applications

Selective reduction methods are being developed to process lateritic nickel ore to produce nickel with high content with low temperature or energy consumption. This research was carried out to study the effect of binary basicity (CaO/SiO2) in the lateritic nickel ore's selective reduction process. The lateritic nickel ore with 1.38% Ni and 38.2% Fe content was used in this study. The reduction was conducted at 1150°C for 60 minutes in a muffle furnace with 10 wt.% additives of sodium sulfate, bituminous coal as reductant, and calcium oxide addition to modify its binary basicity. The results showed that the nickel grades generates from the 0,1 basicity due to the breakage of magnesium, iron, and nickel silicate into metallic iron and nickel. However, the next increase of basicities decreased the nickel grade due to the formation of a high melting point compound. lateritic nickel ore, selective reduction, binary basicity, reductant, additive., Periodico di Mineralogia, Vol. 90 No. 2 (2021): In progress

Cancer is a world-famous deadly disease. According to the World Health Organization (WHO), cancer is the second leading cause of death globally and is responsible for an estimated 9.6 million deaths in 2018. One well-known technique for cancer detection is the DNA microarray technique. DNA microarray technology provides an opportunity for researchers to analyze thousands of gene expression profiles at the same time to determine whether a person has cancer or not. However, one of the problems in DNA microarray data is the large number of features that require feature selection. In overcoming these problems, this study will use the feature selection Support Vector Machine-Recursive Feature Elimination (SVM-RFE) and Chi-Square and use the Naïve Bayes classification method. The accuracy results from using feature selection with those that are not will be compared. The accuracy between using the two feature selection methods will also be compared to find which feature selection method is better when combined with the Naïve Bayes classification method. To get an overall picture of the performance comparison, this study also considers precision, recall, and F1-score. The best accuracy results obtained were 100% lung cancer data with SVM-RFE and Chi-Square, 99.6% ovarian cancer with SVM-RFE, 93.7% breast cancer with SVM-RFE, and 90% colon cancer with SVM- RFE., Journal of Data Science and Its Applications, Vol 3 No 2 (2020): Journal of Data Science and Its Applications

Increasing consumer concern for environmental sustainability is getting bigger, with the issue of green marketing starting to shift from just as added value to being a priority. The emergence of the green consumer and the growing efforts to protect the environment, encourage the industry to consider the environmental impact caused by each of its activities. Industri screen printing is one of the manufacturing companies located in the Surya Cipta industrial area that produces Screen Printing products. In the process of making Screen Printing with one of the items produced, namely named sheet panel can not be separated from the main raw material and support that has chemical elements that have the potential to harm the environment. For this reason, it is necessary to do an evaluation and analysis to determine the value of the environmental impact produced by using the life cycle assessment and life cycle cost method with the support of simapro software so that the value of eco efficiency index (EEI) can be identified from sheet panel products. From this research, it is known that the value of each life cycle assessment and life cycle score is 58.1768704pt at a cost of USD USD 9389,1355 and the value of the eco efficiency index (EEI) sheet panel product is 0.3245, which means that the eco efficiency sheet is affordable but not environmentally friendly (not sustainable).