Article Per Year (5 Year)
p-Index From 2021 - 2026
1.431
P-Index
This Author published in this journals
All Journal METANA JDM (Jurnal Dinamika Manajemen) Prosiding Seminar Nasional Teknoka DHARMA EKONOMI Jurnal Pengelolaan Laboratorium Pendidikan Metalurgi Jurnal Ilmu Manajemen dan Akuntansi Terapan Prima Ekonomika : Jurnal Ekonomi dan Bisnis Jurnal TIKOMSIN (Teknologi Informasi dan Komunikasi Sinar Nusantara) Journal of Practical Computer Science (JPCS) Makara Journal of Technology Prosiding Seminar Nasional Teknik Sipil UMS Metalurgi Jurnal Pengabdian Masyarakat Ilmu Komputer Jurnal Pengabdian Masyarakat Teknologi dan Pendidikan (MANTAP) Journal of Information Technology, Computer Engineering and Artificial Intelligence (ITCEA)
Sri Harjanto
Departemen Metalurgi dan Material, Fakultas Teknik, Universitas Indonesia, Depok 16424, Indonesia
Religion Arts Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Social Sciences

Published : 21 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 21 Documents
Search

 1   2   3 
Mechanical Alloying-assisted Coating of Fe–Al Powders on Steel Substrate Noviyanto, Alfian; Harjanto, Sri; Widayatno, Wahyu Bambang; Wismogroho, Agus Sukarto; Amal, Muhamad Ikhlasul; Rochman, Nurul Taufiqu
Makara Journal of Technology Vol. 24, No. 3
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The coating layer of Fe–Al powders on the steel substrate was prepared by mechanical alloying at room temperature. Fe, Al, and the steel substrates were milled with high-energy ball milling for 32 h with a ball-to-powder ratio of 8 in an argon atmosphere to prevent oxidation during milling. Although mechanical alloying was performed for 32 h, no new phases were observed after mechanical alloying, as analyzed by X-ray diffraction. However, the crystallite size of the milled powders for 32 h decreased by factor two compared with the initial powders. Scanning electron micrographs showed that the coating layers formed >8 h after mechanical alloying. The intermetallic Fe3Al formed after the substrate was annealed at 500 ℃.
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

Abstract

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.
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

Abstract

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

Abstract

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)

Abstract

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
Human Development Index Classification in Central Java Using the K-Nearest Neighbors Method for Data-Driven Policy Making Vulandari, Retno Tri; Harjanto, Sri
Journal of Practical Computer Science Vol. 5 No. 2 (2025): November 2025
Publisher : DPPM Universitas Pelita Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37366/jpcs.v5i2.5996

Abstract

Human development in Central Java continues to show positive progress, as reflected in the consistent increase of the Human Development Index (HDI) across the province. The HDI serves as a key indicator for assessing the success of initiatives aimed at improving the overall quality of life. It measures how well residents are able to access the benefits of development, including long and healthy lives, education, knowledge, and a decent standard of living. The HDI is influenced by four primary components: life expectancy, expected years of schooling, mean years of schooling, and per capita expenditure. Currently, the Central Bureau of Statistics determines HDI values for each regency and city in Central Java using a specific calculation formula. In this study, we aim to classify these regions into three categories based on their HDI levels: very high, high, and moderate estimate areas. To perform this classification, we applied the K-Nearest Neighbors (KNN) algorithm—an effective, non-parametric method that classifies data points based on the majority class among their nearest neighbors in the feature space. KNN is well-suited for classification tasks involving complex, real-world data, offering both accuracy and interpretability. The classification of the 2024 HDI data using KNN resulted in three distinct groups: Cluster 1 (moderate estimate) includes 18 regions: Cilacap, Banyumas, Purbalingga, Banjarnegara, Kebumen, Wonosobo, Magelang, Wonogiri, Grobogan, Blora, Rembang, Temanggung, Kendal, Batang, Pekalongan, Pemalang, Tegal, and Brebes. Cluster 2 (high estimate) consists of 13 regions: Purworejo, Boyolali, Klaten, Sukoharjo, Karanganyar, Sragen, Pati, Kudus, Jepara, Demak, Semarang Regency, Kota Pekalongan, and Kota Tegal. Cluster 3 (very high estimate) comprises 4 urban areas: Kota Magelang, Kota Surakarta, Kota Salatiga, and Kota Semarang. This classification provides valuable insights into regional development disparities and can support evidence-based planning and policy-making.
Pembuatan Sistem Informasi Monitoring dan Evaluasi Member Klinik Ummat Manang Harjanto, Sri; Sefriani, Eka Widya; Tri Vulandari, Retno
Jurnal Pengabdian Masyarakat Teknologi dan Pendidikan (MANTAP) Vol. 2 No. 1 (2025): Jurnal Pengabdian Masyarakat Teknologi dan Pendidikan (Jurnal Mantap)
Publisher : Redtech Putra Benua

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Monitoring and evaluation (Monev) activities play a crucial role in overseeing the implementation of a program. However, clinic management has not yet optimized member data management due to limited human resources and the existing system. The problem formulation of this practical work is how to develop a web-based monitoring and evaluation information system for members at Klinik Ummat Manang. The presence of this system aims to facilitate clinic staff in monitoring clinic members. During the analysis phase, data collection methods include interviews with clinic representatives, observations, and literature studies. The data sources consist of primary and secondary data. The system design utilizes Unified Modeling Language (UML), while the construction phase employs PHP as the programming language and MySQL as the database management system (DBMS). The software used includes Sublime Text 3 and Laragon as a virtual server. This system is designed to be accessible on both desktop and mobile devices. The expected outcome is the development of a monitoring and evaluation information system for Klinik Ummat members, which simplifies data management and member monitoring for all relevant parties.  Keywords: Monitoring and Evaluation System, Web-Based System, Member Management.
ANALISA PENGARUH STRUKTUR ASET DAN NON PERFORMING FINANCING TERHADAP TINGKAT PROFITABILITAS DENGAN STRUKTUR PEMBIAYAAN SEBAGAI VARIABEL INTERVENING: STUDI EMPIRIS PADA KOPERASI SIMPAN PINJAM PEMBIAYAAN SYARIAH DI KABUPATEN JEPARA Muslimin, Muslimin; Winarti HS, Endah; Harjanto, Sri
Jurnal Ilmu Manajemen dan Akuntansi Terapan (JIMAT) Vol. 9 No. 2 (2018): Jurnal Ilmu Manajemen dan Akuntansi Terapan (JIMAT)
Publisher : Sekolah Tinggi Ilmu Ekonomi Totalwin

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1660.86 KB) | DOI: 10.36694/jimat.v9i2.168

Abstract

Savings and Loans Cooperatives Syari'ah Financing in Jepara Regency is a cooperative that must be able to stand alone in carrying out its business activities to earn profits. This research is about level of profitability in syari'ah financing savings and loan cooperative in the Cooperative Office, Small and Medium Enterprises, Labor and Transmigration in Jepara Regency. The aim is to analyze effect of asset structure and Non Performing Financing (NPF) on level of profitability with financing structure as an intervening variable. The sample was selected through 34 purposive sampling cooperatives. Data was obtained by analyzing financial statements of the annual member meetings of each cooperative that reported reports in the Cooperative Office, Small and Medium Enterprises, Labor, and Transmigration in Jepara District from 2013 to 2017. Analysis of data using multiple linear regression using SEM-PLS 4.0 program. The results show that asset structure has a significant negative effect on financing structure. NPF has a significant negative effect on financing structure. The asset structure does not effect profitability. NPF has a significant negative effect on profitability. Financing Structure has a significant positive effect on profitability. Financing to Deposit Ratio mediates effect of asset structure on profitability. The Financing Structure mediates effect of NPF on profitability.
Analisa Tingkat Kepuasan Pengguna Website Badan Kepegawaian, Pendidikan, Dan Pelatihan Daerah Pemerintah Kabupaten Boyolali Menggunakan Metode End User Computing Satisfaction Agustiningsih, Yuliana; Harjanto, Sri; Setiyowati
Journal of Information Technology, Computer Engineering and Artificial Intelligence (ITCEA) Vol. 1 No. 1 (2024): Journal of Information Technology, Computer Engineering and Artificial Intellig
Publisher : Redtech Putra Benua

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The Boyolali District Civil Service, Education, and Training Agency (BKP2D) serves as a platform for exchanging information with Civil Servants (PNS) in Boyolali Regency. The Boyolali Regency Government continuously develops and improves the website to ensure the quality and satisfaction of its users. However, the level of user satisfaction with the BKP2D website among its users is not yet known. Therefore, the End User Computing Satisfaction (EUCS) method is employed to determine the extent of user satisfaction with the website. This method involves measuring variables that encompass content, accuracy, format, ease of use, and timeliness. The BKP2D website for Boyolali Regency can be accessed at http://bkp2d.boyolali.go.id/. The research was conducted by distributing questionnaires through Google Forms to 379 respondents. The data from the questionnaires were processed using SPSS for descriptive statistical analysis. The research results indicate an average score of 3.29 (satisfied), which means that users generally find the BKP2D website satisfactory
Detection of H1N1 Sequence Alignment with Basic Local Alignment Search Vulandari, Retno Tri; Harjanto, Sri
Journal of Information Technology, Computer Engineering and Artificial Intelligence (ITCEA) Vol. 1 No. 2 (2024): Journal of Information Technology, Computer Engineering and Artificial Intellig
Publisher : Redtech Putra Benua

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Bioinformatics is a science that studies the management and analysis of biological information. Bioinformatics includes application of mathematics, statistics, and informatics to biological problems to solve. Bioinformatics can store data generated by the genome project with regular and high degree of accuracy. Basic local alignment search is one of the methods used to process penyejajaran molecular data sequences. In 2009, there is a virus that attacks the respiratory tract that is the swine flu. The virus is spread around the world, so that retrieved the journal research on diverse virus DNA sequences in different endemic countries. Therefore, in this study will be explained about the process sequence alignment of the H1N1 swine flu virus. H1N1 Weiss AF 250365.2 and H1N1 Swine AF250364.2 have 90% similarity level.
Co-Authors Abidin, Faizinal Agus Sukarto Wismogroho, Agus Sukarto Agustiningsih, Yuliana Akhmad Herman Yuwono Amal, Muhamad Ikhlasul Andriyah, Lia Andriyah, Lia Arbi Dimyati Ari Wibowo Bambang Suharno Bustanul Arifin Duroriyatul Aulya, Duroriyatul Eko Sulistiyono, Eko Eny Kusrini Firdiyono, Firdiyono Florentinus Firdiyono Hakim, Rifaldi Ali Hanny Hafiar Heru Sulistiyo, Heru Irawan, Januar Kawigraha, Aji Lalasari, Latifa Hanum Lalasari, Latifa Hanum Marzuki Silalahi Muslimin Muslimin N, Elfi Natasha, Nadia Chrisayu Nofrijon Sofyan, Nofrijon Noor Salim Noviyanto, Alfian Nurhayati, Neni Octapiani Nurul Hidayati Nurul Taufiqu Rochman P, Nur Vita Pudji Untoro Raharja, Bayu Dwi Raharjo Raharjo Raharjo, R Retno Tri Vulandari Sefriani, Eka Widya Senja Rum Harnaeni Setiyowati Sri Siswanti Suharyanto, Ariyo Sulistiyowati, Arini Sutono -, Sutono Teguh Susyanto Tri Arini, Tri Tri Irawati, Tri Tri Vulandari, Retno Wahyu Bambang Widayatno, Wahyu Bambang Waskitho, Anggit Widhi Wijayanto, Hendro Winarti HS, Endah Yunita, Fariza Eka