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All Journal Jurnal Teknik Mesin METANA Jurnal Sains Materi Indonesia JDM (Jurnal Dinamika Manajemen) Prosiding Seminar Nasional Teknoka JURNAL EKONOMI MANAJEMEN AKUNTANSI DHARMA EKONOMI Jurnal Pengelolaan Laboratorium Pendidikan Metalurgi Jurnal Ilmu Manajemen dan Akuntansi Terapan Jurnal Metalurgi dan Material Indonesia Prima Ekonomika : Jurnal Ekonomi dan Bisnis Jurnal TIKOMSIN (Teknologi Informasi dan Komunikasi Sinar Nusantara) International Journal Law and Legal Ethics (IJLLE) Journal of Practical Computer Science (JPCS) Makara Journal of Technology Abdi Makarti Prosiding Seminar Nasional Teknik Sipil UMS Jurnal Ekonomi Manajemen Akuntansi Dharma Ekonomi Metalurgi Riset Ilmu Manajemen Bisnis dan Akuntansi Jurnal Pengabdian Masyarakat Ilmu Komputer Jurnal Akuntan Publik

Sri Harjanto

Departemen Metalurgi Dan Material, Fakultas Teknik, Universitas Indonesia, Depok 16424, Indonesia

Author-ID : 276273

Aerospace Engineering Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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EFFECTIVENESS OF THE SEPARATION OF MAGNESIUM AND LITHIUM FROM SEAWATER WITH SODIUM SILICATE PRECIPITATION PROCESS Latifa Hanum Lalasari; Eko Sulistiyono; Sri Harjanto; Florentinus Firdiyono; Nadya Chrisayu Natasha; Yosephin Dewayani
Metalurgi Vol 37, No 1 (2022): Metalurgi Vol. 37 No. 1 April 2022
Publisher : National Research and Innovation Agency (BRIN)

Experiments have been carried out to separate elements of magnesium and lithium from seawater to produce a lithium concentrate product that is free of magnesium through sodium silicate precipitation processes. In this study, the sample used was seawater taken from the Ancol Lagoon Area, North Jakarta. The sea water used contains 0.1674 ppm lithium ions and 1761 ppm magnesium ions with a high Mg/Li ratio of 10521. The seawater containing high levels of magnesium is not suitable as a raw material for for the manufacture of lithium carbonate (battery active ingredient) prior to initial processing. The research variable was the volume of sodium silicate solution added by 10 ml, 20 ml, 30 ml, 40 ml, 50 ml, 60 ml, 70 ml, and 100 ml which were equivalent to 13%, 27% 40%, 53%, 67%. , 80 %, 93%, and 107% stoichiometry of magnesium ion and the technique of adding sodium silicate solution included a single stage and multi-stages. From the experimental results, it can be seen that the most effective addition of sodium silicate is the addition of 80% stoichiometry. The sodium silicate precipitation process succeeded in separating magnesium ions and lithium ions from seawater as indicated by a decrease in the Mg/li ratio from 10521 to 64. The obstacle in this study was that there were still many lithium ions that were also precipitated with magnesium silicate during the precipitation process so that the lithium lost in the filtrate reached 82.26% in the single stage process. Therefore, a multi-stage process was carried out with 6 stages of the process that the addition of sodium silicate for each stage was 1/6 of the volume of sodium silicate solution at single stage optimum conditions. The results obtained from the multi-stage process were able to reduce the lithium ion lost in the filtrate to 76.54%. From the results of the study, it can be concluded that efforts to reduce the percentage of lithium ions lost in the filtrate product need to be carried out through the development of a sodium silicate precipitation process.

ULTRASONIC TREATMENT EFFECT ON THE CONSOLIDATION OF Fe-Cr PARTICLE MIXTURES AFTER COMPACTION AND SINTERING PROCESS Marzuki Silalahi; Pudji Untoro; Bambang Suharno; Sri Harjanto
Metalurgi Vol 29, No 2 (2014): Metalurgi Vol.29 No.2 Agustus 2014
Publisher : National Research and Innovation Agency (BRIN)

PENINGKATAN STRATEGI PEMASARAN DAN BRANDING UMKM DESA PENTUR KABUPATEN BOYOLALI MELALUI DIGITAL MARKETING Andriani Kusumaningrum; Sri Harjanto; Sri Siswanti; Setiyowati Setiyowati; Mita Purwati; Retno Tri Vulandari
ABDI MAKARTI Vol 2, No 2 (2023): ABDI MAKARTI
Publisher : Sekolah Tinggi Ilmu Ekonomi AMA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52353/abdimakarti.v2i2.523

Economically, most of the residents of Pentur Village are farmers, both working in paddy fields and fields, apart from that, it is also a center for the bamboo woven craft industry which is the livelihood of some of the residents. In fact, Pentur village also has a fairly well-known foundation called "Tumpi Redhouse" which was founded on July 16 2012. In this library there are 2500 book collections, hundreds of film collections, various magazines and reference books. Apart from being a place to read, this library also holds various community empowerment activities such as agricultural activities and MSME groups. Several arts live in this village, various traditional ceremonies such as cleaning the village with shadow puppet performances are still held every year, apart from that, reog art, music and painting are also the breath of artistic activities in this village. The aim of this service is to implement visuals in content and digital marketing formats to improve the economy of Pentur village. Methods for implementing the service include content creator and digital marketing workshops for MSMEs in Pentur village. The resulting output is the implementation of the workshop. At the end of this program, activities will be published via print and online media.

PENERAPAPAN METODE K-MEANS CLUSTERING DALAM PENGELOLAAN KESEJAHTERAAN SOSIAL DI DESA PENTUR Hakim, Rifaldi Ali; Harjanto, Sri; Wibowo, Ari
Jurnal Teknologi Informasi dan Komunikasi (TIKomSiN) Vol 12, No 1 (2024): Jurnal TIKomSiN Vol 12, No. 1 April 2024
Publisher : STMIK Sinar Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30646/tikomsin.v12i1.820

Managing aid to improve social welfare in the Pentur village environment is carried out conventionally and requires special attention so that it is not misdirected. Community welfare can be seen from several aspects, namely sufficient income, adequate education and health. The application of the k-means clustering method in managing social welfare in Pentur village will facilitate the performance of the village government in improving the social welfare of its citizens. The clustering process, with the calculations used are variables based on family dependents, monthly income of the head of the family and property ownership. K-Means clustering is a method that divides data into groups that have objects with the same characteristics. The results of applying k-means clustering for the Social Welfare cluster are divided into 3 parts, namely cluster 1 or low gets a result of 11, cluster 2 or medium gets a result of 11, and cluster 3 or high gets a result of 3. The results of the validity test are carried out using calculations silhouette coefficient and produces a global s(i) value of 0.360222796 and can be said to be good because there are no numbers that show < 0 or no over lapping occurs so it can be said that the data that has been processed has good quality.

Pengaruh Current Ratio Dan Net Profit Margin Terhadap Harga Saham Dengan Earning Per Share Dan Dividend Per Share Sebagai Variabel Mediasi Pada Perusahaan LQ. 45 Di Bursa Efek Indonesia Tahun 2019-2022 Bella Suci Maylianawati; Sri Harjanto; Dwi Rahayu
Jurnal Rimba Riset Ilmu manajemen Bisnis dan Akuntansi Vol. 2 No. 3 (2024): Agustus : Riset Ilmu Manajemen Bisnis dan Akuntansi
Publisher : Asosiasi Riset Ilmu Manajemen Kewirausahaan dan Bisnis Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/rimba.v2i3.1115

This research aims to analyze the influence of the Current Ratio and Net Profit Margin on share prices with Earning Per Share and Dividend Per Share as mediating variables in LQ45 companies on the Indonesia Stock Exchange in 2019-2012. The sample taken was based on a saturation number of 180 companies. The data collection method used in this research is documentation, and the analysis technique uses regression analysis (path analysis) and the sobel test. The research results show that the Current Ratio has no effect on Earning Per Share and Net Profit Margin has a positive effect on Earning Per Share. Current Ratio and Net Profit Margin have no effect on Dividend Per Share. Current Ratio, Net Profit Margin, Earning Per Share, and Dividend Per Share have no effect on share prices. Earning Per Share is unable to mediate the Current Ratio of Share Prices. Earning Per Share is able to mediate Net Profit Margin on Share Prices. Dividend Per Share is not able to mediate the Current Ratio and Net Profit Margin on Share Prices.

The Effect of pH and Sodium Silicate Dosage on the Separation of Magnesium and Lithium from Artificial Brine Water Using Chemical Precipitation Techniques Lalasari, Latifa Hanum; Sulistiyono, Eko; Harjanto, Sri; Irawan, Januar; Firdiyono, Florentinus; Arini, Tri; Andriyah, Lia; Suharyanto, Ariyo; Natasha, Nadia Chrisayu; Yunita, Fariza Eka
Metalurgi Vol 38, No 3 (2023): Metalurgi Vol. 38 No. 3 2023
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/metalurgi.2023.728

This study aims to report the findings of an investigation into the separation of lithium and magnesium ions in the artificial brine water. The artificial brine water contains concentrations of magnesium, calcium, and lithium cations that closely resemble the concentrations seen in natural brine water sourced from Gunung Panjang using magnesium chloride, calcium chloride, and lithium chloride p.a. The objective of this experiment was to investigate the impact of pH and the addition of sodium silicate on the separation of magnesium and calcium ions from lithium ions in artificial brine water. The best outcomes were achieved when the pH of the brine water was set at 10, and sodium silicate was added in a stoichiometric ratio of 219%. These parameters led to a lithium content of 90.06%, magnesium removal of 70.32%, and a Mg/Li ratio of 6.29, indicating a substantial presence of magnesium ions precipitated as solids with pyroxene (MgSiO3) phase. This research also succeeded in increasing the lithium content by 94.28% and reducing the Mg/Li ratio to 4.96 after the precipitated solids were subjected to a water-leaching process.

PENGEMBANGAN MEDIA PEMBELAJARAN INTERAKTIF MATA PELAJARAN MATEMATIKA Waskitho, Anggit Widhi; Siswanti, Sri; Raharja, Bayu Dwi; Teguh Susyanto; Irawati, Tri; Wijayanto, Hendro; Vulandari, Retno Tri; Harjanto, Sri
Jurnal Pengabdian Masyarakat Ilmu Komputer Vol. 1 No. 2 (2024): Mei
Publisher : Yayasan Nuraini Ibrahim Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59407/jpmik.v1i2.788

Media pembelajaran interaktif mata pelajaran Matematika dengan menggunakan Adobe Flash CS 6 ini berisi materi tentang bangun-bangun yang termasuk dalam kesebangunan dan kongruen. Tujuan pengabdian masyarakat ini adalah menciptakan sebuah aplikasi media pembelajaran interaktif mata pelajaran Matematika materi kesebangunan dan kongruen dengan menggunakan Adobe Flash CS6 di SMP Negeri 24 Surakarta. Materi kesebangunan dan kongruen merupakan materi pelajaran yang membutuhkan banyak contoh dan pratikum dalam proses belajar, jika hanya menggunakan buku yang bersifat monoton, membuat siswa sulit untuk membayangkan apa yang dimaksud soal dan latihan. Hasil berupa aplikasi media pembelajaran interaktif mata pelajaran Matematika materi kesebangunan dan kongruen dengan menggunakan Adobe Flash CS6 yang disertai dengan latihan soal yang dapat digunakan sebagai alat bantu pengajar dalam pembelajaran ataupun digunakan secara mandiri oleh pengguna.

ANALISIS KESADARAN WAJIB PAJAK DALAM MEMEDIASI PENGARUH PENGETAHUAN PAJAK, KUALITAS PELAYANAN DAN PEMERIKSAAN PAJAK TERHADAP KEPATUHAN WAJIB PAJAK HOTEL, RESTORAN DAN HIBURAN: STUDI KASUS DIKABUPATEN JEPARA Salim, Noor; Sulistiyo, Heru; Harjanto, Sri
PRIMA EKONOMIKA Vol. 9 No. 1 (2018): Prima Ekonomika
Publisher : STIE "YKP" YOGYAKARTA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (629.876 KB)

Penelitian ini mengenai kepatuhan wajib pajak hotel, restoran dan hiburan diKabupaten Jepara. Tujuannya adalah menganalisis kesadaran wajib pajak dalammemediasi pengaruh pengetahuan pajak, kualitas pelayanan dan pemeriksaan pajakterhadap kepatuhan wajib pajakSample terpilih melalui purposive samplingsebanyak 91 responden meliputi 46 hotel, 34 restoran dan 11 hiburan di KabupatenJepara. Data diperoleh dengan membagikan kuesioner. Kuesioner yang kembalisebanyan 87 kuesioner. Analisis data menggunakan regresi linier berganda denganmenggunakan Progarm SEM-PLS 4.0.Hasil menunjukkan bahwa pengetahuan pajak, kualitas pelayanan, danpemeriksaan pajak berpengaruh positif signifikan terhadap kesadaran wajib pajak.Kesadaran wajib pajak berpengaruh positif signifikan terhadap kepatuhan wajibpajak. Kesadaran wajib pajak memediasi hubungan pengaruh pengetahuan pajak,kualitas pelayanan, dan pemeriksaan pajak terhadap kepatuahan wajib pajak pengujian normalitas, penyimpangan asumsi klasik, uji fit data dan pengujianhipotesis serta koefisien determinasi

Pengaruh Kompetensi, Kompleksitas dan Workload terhadap Kualitas Audit dengan Pemahaman Sistem Informasi Sebagai Variabel Moderasi Atta Putra Harjanto; Siti Rahayu Lorosae Murianingsih; Sri Harjanto; Armania Putri Wardhani
Jurnal Ekonomi Manajemen Akuntansi Vol. 30 No. 2 (2024): JURNAL EKONOMI MANAJEMEN AKUNTANSI
Publisher : sekolah Tinggi Ilmu Ekonomi Dharma Putra Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59725/ema.v30i2.111

Purpose: The purpose of this study is to analyze the Influence of Competence, Complexity, Workload on Audit Quality. In addition, this study is to determine whether or not there is a role of understanding information systems in moderating the influence of Competence, Complexity, Workload on Audit Quality. Method: The population in this study were auditors working in Public Accounting Firms in Semarang City. The research sample used a purposive sampling technique. The data collection technique was distributing questionnaires to 15 KAPs in Semarang City, with a note that 11 KAPs were willing to fill out the questionnaire while 4 KAPs refused to fill out the questionnaire. The analysis tool used was IBM SPSS Statistics 23. Findings: The results of the study prove that competence has a significant negative effect on audit quality, complexity and workload do not affect audit quality. Meanwhile, understanding information systems can moderate by strengthening the influence of competence on audit quality and understanding information systems can moderate by weakening the influence of complexity and workload on audit quality. Novelty: In this study, previous studies have not found involvement in competence, complexity, and workload that have an effect on audit quality. So the author is interested in researching more deeply about the factors that influence audit quality by presenting a moderating variable, namely understanding of information systems.

Pengaruh Capital Adequacy Ratio (CAR), Beban Operasional Pendapatan Operasional (BOPO), dan Non Performace Financing (NPF) Terhadap Profitabilitas pada Perusahaan Perbankan pada Bursa Efek Indonesia Tahun 2017-2019 Fidi Kurnianto; Sri Harjanto
Dharma Ekonomi Vol. 29 No. 1 (2022): DHARMA EKONOMI
Publisher : sekolah Tinggi Ilmu Ekonomi Dharmaputra Semarang

Tujuan penelitian ini adalah untuk menguji pengaruh Capital Adequacy Ratio (CAR), Beban Operasional Pendapatan Operasional (BOPO), dan Non Performace Financing (NPF) Terhadap Profitabilitas pada Perusahaan Perbankan pada Bursa Efek Indonesia Tahun 2017-2019. Dalam penelitian ini yang menjadi populasi adalah jumlah perusahaan perbankan yang terdaftar di Bursa Efek Indonesia dari tahun 2017-2019 yang berjumlah 43 perusahaan. Sampel dalam penelitian ini yaitu berjumlah 23 perusahaan dengan metode purposive sampling. Hasil Penelitian menunjukkan bahwa nilai t-hitung Capital Adequacy Ratio (CAR) (X1) adalah sebesar 0,497 dan nilai probabilitas lebih besar dari 0,05 yaitu sebesar 0,621. Hal ini menunjukkan bahwa variabel Capital Adequacy Ratio (CAR) (X1) tidak berpengaruh signifikan terhadap Profitabilitas. Hipotesis pertama dalam penelitian ini ditolak. Nilai t-hitung Beban Operasional Pendapatan Operasional (BOPO) (X2) adalah sebesar -4,745 dan nilai probabilitas lebih kecil dari 0,05 yaitu sebesar 0,000. Hal ini menunjukkan bahwa variabel Beban Operasional Pendapatan Operasional (BOPO) (X2) berpengaruh signifikan terhadap Profitabilitas. Hipotesis kedua dalam penelitian ini diterima. nilai t-hitung Non Performance Financing (NPF) (X3) adalah sebesar 1,237 dan nilai probabilitas lebih besar dari 0,05 yaitu sebesar 0,221. Hal ini menunjukkan bahwa variabel Non Performance Financing (NPF) (X3) tidak berpengaruh signifikan terhadap Profitabilitas. Hipotesis ketiga dalam penelitian ini ditolak.

Co-Authors A. Zakiyuddin Abidin, Faizinal Achmad Fauzi Trinanda Agus Sukarto Wismogroho, Agus Sukarto Ahmad Zakiyuddin Ain Hajawiyah Aji Kawigraha Aji Wibisono Akhmad Herman Yuwono Aldi Alfarizi Alfian Noviyanto Amal, Muhamad Ikhlasul Andreas Sugiarto Andriani Kusumaningrum Andriani Kusumaningrum Andriyah, Lia Andriyah, Lia Arbi Dimyati Ari Wibowo arie_febrianto febrianto Armania Putri Wardhani Asrori . Atsushi Shibayama Atta Putra Harjanto Bambang Suharno Bambang Suharno Bambang Suharno Bambang Suharno Bambang Suharno Bambang Suharno Bella Suci Maylianawati Benediktus Ma'dika Bustanul Arifin Bustanul Arifin Bustanul Arifin Cahyo Cahyo Didik Nugroho Duroriyatul Aulya, Duroriyatul Eko Sulistiyono Eko Sulistiyono, Eko Elfi N Eny Kusrini Erika Lirachandra Erryani, Aprilia Faizinal Abidin Fatih Abdul Syauqi Fidi Kurnianto Firdiyono Firdiyono Firdiyono, Firdiyono Florentinus Firdiyono Florentinus firdiyono Ghiska Ramahdita Hakim, Rifaldi Ali Hanifah Wijayanti Hanny Hafiar Henki W Ashadi Heru Sulistiyo, Heru Ika Kartika Irawan, Januar Kawigraha, Aji Lalasari, Latifa Hanum Lalasari, Latifa Hanum Latifa Hanum Lalasari Latifa Hanum Lalasari Lia Andriyah Luthfi Dali Ahmad M. Asykar Bangun M. Yogi Riyantama Isjoni Madiyono Madiyono Marzuki Silalahi Marzuki Silalahi Maulana Naufalino Mita Purwati Mohammad Ilham Daradjat Mohammad Risky Arya Pratama Muslimin Muslimin N, Elfi Nadya Chrisayu Natasha Nanda, Is Prima Natasha, Nadia Chrisayu Neni Nurhayati Nofrijon Sofyan, Nofrijon Noor Salim Nur Vita P Nurhayati, Neni Octapiani Nurul Hidayati Nurul Taufiqu Rochman P, Nur Vita Prima Sony Pudji Untoro Pudji Untoro Pudji Untoro Putu Sulastri Raharja, Bayu Dwi Raharjo Raharjo Raharjo, R Ravanya Nabilla Ramadhani Parawansa Retno Tri Vulandari Rima Dimiyati Rokhmanto, Fendy Royan Bagus Hayyu Senja Rum Harnaeni Setiyowati Setiyowati Setyawan, Albertus Deny Heri Setyoaji Fajar Negara Siti Rahayu Lorosae Murianingsih Sonia Ratnaning Pertiwi Sri Siswanti Sri Tomo Subchan . Suharyanto, Ariyo Sulistiyowati, Arini Sutikni Sutikni Sutono -, Sutono Teguh Susyanto Thaha, Yudi Nugraha Tri Arini, Tri Tri Irawati, Tri Wahyu Bambang Widayatno, Wahyu Bambang Wahyuaji Narottama Putra Wahyuaji Putra Waskitho, Anggit Widhi Wijayanto, Hendro Wika Septian Prasetya Winarti HS, Endah Yosephin Dewayani Yucai Cao Yudha Pratesa Yunita Sadeli Yunita, Fariza Eka Yustina Retno Wahyu Utami

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