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Budi Prayitno
Pengajar Program Pascasarjana Jurusan Arsitektur dan Perencanaan Universitas Gadjah Mada
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ANALYSIS OF THE INFLUENCE OF LABOR, INVESTMENT, AND INFLATION ON THE GROWTH OF THE MANUFACTURING INDUSTRY IN EAST JAVA FROM 2008-2023 Wijaya, Aldian Jodi Pemana; Prayitno, Budi; Wany, Eva
International Journal of Accounting Innovation Vol. 2 No. 1 (2026): February
Publisher : PT ANTIS INTERNATIONAL PUBLISHER

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61796/ijai.v2i1.31

Abstract

Objective : This study analyzes the impact of labor, investment, and inflation on the growth of the manufacturing sector in East Java Province during 2008–2023. Method: Using an explanatory quantitative approach with a log-linear multiple regression model and annual secondary data from the Central Statistics Agency (BPS). Results: The results show that labor has a positive and significant effect, while inflation has a negative and significant effect on industrial growth. Investment has a positive but statistically insignificant impact. Simultaneously, all three variables show significant influence with an Adjusted R² of 80.76%. These findings highlight the importance of industrial development policies that consider workforce quality, inflation stability, and investment effectiveness. Novelty: This study provides empirical evidence on the simultaneous impact of labor, investment, and inflation on manufacturing sector growth in East Java Province during 2008–2023 using a log-linear multiple regression model with long-term annual data.
Evaluating Petrographic and Mechanical Property Correlations in Sihapas Formation for High-Pressure Hydraulic Fracturing Using Pearson and Spearman Methods Prayitno, Budi; Akhillah, Daffa; Novrianti; Panuh, Dedikarni
Scientific Contributions Oil and Gas Vol 49 No 1 (2026)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v49i1.1999

Abstract

This study aimed to evaluate the suitability of natural frac sand (SiO₂) from the Sihapas Formation as a proppant for hydraulic fracturing in unconventional oil and gas reservoirs in Riau Province, Indonesia. Quantitative–qualitative evaluation in hydraulic fracturing systems is conducted to assess the performance of quartz grains (SiO₂) in enhancing and maintaining fluid flow conductivity under the influence of stress, formation blockage, and chemical interactions. Sieve distribution analysis was performed to determine particle size distribution, crush resistance testing was conducted to evaluate mechanical strength, and X-Ray Diffraction (XRD) was used to characterize mineral composition. The correlative relationships among parameters were further analyzed using Pearson and Spearman statistical methods, with API RP 56 (frac sand) and API 19C (proppant) standards serving as benchmarks. The results showed that the 40/70 mesh fraction dominates across samples, though roundness values fall below specification thresholds while sphericity remains within acceptable ranges. Grain hardness testing at 5000 psi showed relatively high destruction rates, while mineralogical analysis confirmed a consistently high SiO₂ composition (≥98%) with secondary clay minerals. Elevated turbidity and alkaline pH values were also observed. Statistical analysis showed strong correlations among parameters, reflecting the influence of geological transport processes on grain morphology and mineral decomposition due to diagenetic processes. In general, these findings showed that natural frac sand samples do not fully meet API standards, highlighting the need for innovation and direct well testing to enhance material quality for hydraulic fracturing applications.
Pengaruh Kualitas Pelayanan dan Word of Mouth Terhadap Loyalitas Pelanggan dan Keputusan Pembelian Sebagai Intervening Prayitno, Budi; Bambang Trisula, Rudi; Bastaman, Aam
Jurnal Sosial Teknologi Vol. 6 No. 3 (2026): Jurnal Sosial dan Teknologi
Publisher : CV. Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/jurnalsostech.v6i3.32726

Abstract

Saat ini, banyak pelaku UMKM yang mengambil bagian di bidang kuliner. Banyaknya pelaku yang terjun di dunia kuliner di kota Depok membuat persaingan antar pelaku UMKM semakin ketat. Dapur Bunda merupakan salah satu UMKM catering yang berlokasi di Sawangan, Kota Depok menghadapi banyak tantangan dari banyak competitor yang bermain di bisnis catering. Penelitian ini bertujuan untuk mengetahui pengaruh kualitas pelayanan dan word of mouth terhadap loyalitas pelanggan dan keputusan pembelian sebagai intervening. Metode penelitian menggunakan analisis deskriptif dan analisis PLS-SEM dengan software SmartPLS 4.0. Hasil penelitian ini membuktikan bahwa Kualitas pelayanan berpengaruh positif dan signifikan terhadap loyalitas pelanggan. Word of mouth tidak berpengaruh terhadap loyalitas pelanggan. Kualitas pelayanan berpengaruh positif dan signifikan terhadap keputusan pembelian. Word of mouth berpengaruh positif dan signifikan terhadap keputusan pembelian. Keputusan pembelian berpengaruh positif dan signifikan terhadap loyalitas pelanggan. Kualitas pelayanan berpengaruh positif dan signifikan terhadap loyalitas pelanggan melalui keputusan pembelian. Word of mouth berpengaruh positif dan signifikan terhadap loyalitas pelanggan melalui keputusan pembelian.  Temuan ini mengimplikasikan bahwa untuk membangun loyalitas pelanggan, Dapur Bunda perlu meningkatkan kualitas pelayanan secara konsisten dan mengoptimalkan word of mouth sebagai strategi promosi yang pada akhirnya akan mendorong keputusan pembelian dan membentuk loyalitas pelanggan secara berkelanjutan.
Co-Authors Abidin, Khoirul Abidin, Khoirul Abidin Adi Suryadi, Adi Agung R, Risa Rahelia Agung R., Risa Rahelia Agus Pramono Agustin, Tyssa Amelia Vega Ahmad Sarwadi, Ahmad Aini , Auliya Nur Akhillah, Daffa Alfini Baharuddin Anak Agung Istri Sri Wiadnyani Andrie, Attila Alief Anugrah Apri Siswanto Ardhansyah, Mukti Ariadi, Adyanti Putri Aulia, Zahra Windi B. Hari Wibisono, B. Hari Bambang Setyadarma, Bambang Bambang Trisula, Rudi Bastaman, Aam Che Isa, Nik Norziehana Dedikarni Devy Setiorini Sa’adiyah Dewandra Bagus Eka Putra, Dewandra Bagus Eka Dimas Wihardyanto Eva Wany, Eva Fachry Abda El Rahman Fahlepi, Reza Faridah Faridah Fauziyah , Nur Aini Febriansyah G. Perdamaian, Laksana Gatut Yudoyono Guntoro, Pri Joewo harmiyati, harmiyati Heriyanto Husnul Kausarian Idhil Ismail, Andi Ismail, Mohd Suhaili Bin Kartika, Siska Ayu Kasarian, Husnul Kholidiah, Kholidiah Kusuma, Gabriella Liem, Adrianus Leo M. Sani Roychansyah, M. Sani M. Uswah Pawara Mahera, Adinda Kholif Marianti, Annisa Miswaty, Miswaty Mita, Maichel Santo Wijaya Mohamed, Zakiah Munirah, Kultsum Musyarofah Musyarofah Musyarofah Musyarofah, Musyarofah Nafisah, Azmia Rizka Natalia, Venincia Nining Sudini Ningrum, Nining Sudini Ni’matus Sholihah Norhidayah, Siti Novrianti Nuraini , Umi Nuraini, Inas Nurhayati Nurhayati P, Ginanjar Perdana Panuh, Dedi Karni Panut Mulyono Poo-arporn, Yingyot Pratomo Prawirodirjo, Raden Ronggo Bintang Puji Astuti Purwitasari, Fadilla Puspitasari, Nurrisma Qomarun Qomarun Rahastama, Swastya Retno, Deddy Purnomo Rosmiati Rosmiati Roychansyah, M Sani S. Utami, Sentagi Sahid, Reza Achmad Sahira, Putri Salis, Fiki Rahmatika Saputra, Dwi Mulia Nur Sarjono Sarjono, Sarjono Sastrawan, Febrian Dedi Saufik Luthfianto Septiyanti, Resty Dwi shoodiqin, dian mart Sihaloho, Elisabeth Romanauli Simanjuntak, Cristovel Siregar, Riki Ruli Affandi Siti Ramdiah Siwanto, Apri Sri Yuliani Sudarto Sudarto Suhada, Egi Susilo Susilo Syahputra, Junico Dwi Syakirin, Hirzan Fakhrusy Tajalla, Gusti Umindya Nur Tanaka, Isao Tantri Bararoh Tri Yuni Iswati Triwikantoro Triwikantoro Utami, Sentagi Sesotya Utomo, Zinedine Zidane Vaningsiau, Pravangasta Ajeng Wany, Eva Wany Wibisono, B Hari Wiendu Nuryanti Wijaya, Aldian Jodi Pemana Wiwik Setyaningsih Yustie, Renta Yustisie, Renta