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All Journal Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) EKONOMIS : Journal of Economics and Business Indonesian Physical Review Management Studies and Entrepreneurship Journal (MSEJ) Jurnal Politik Pemerintahan Dharma Praja The World of Public Administration Journal Jurnal Tadbir Peradaban JIPITI: Jurnal Pengabdian kepada Masyarakat Journal of Management
Yayat Sudrajat
Pusat Penelitian Geoteknologi LIPI
Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Physics Social Sciences Other

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Changes in the Configuration of the Fresh Water Lens due to ASRRG, Western Part of the Tiny Pari Island, Seribu Islands, Jakarta, Indonesia Utomo, Edi Prasetyo; Purwoaminta, Ananta; Sudrajat, Yayat
Jurnal Geologi dan Sumberdaya Mineral Vol 18, No 1 (2017): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (465.671 KB)

Abstract

Pari Island (Pulau Pari) is a small coral island in the Seribu Islands group off the north coast of the Jakarta Capital Special Region. Government has planned to develop this island into a tourist attraction because of its beautiful environment. However, the government development plans have not included facilities to meet the demand for groundwater, which represents the principal resource to meet the demand for freshwater. Pari Island has limited resources of groundwater due to the small size of the area where recharge of groundwater from rainfall can take place. A problem will arise that with the increase of visitors to the island the demand for freshwater will increase, while  groundwater resources of the island are very limited and dominated by brackish and saline groundwater. The objective of this research was to explore the possibility to increase the resources of fresh groundwater of Pari Island to support the increasing demand of fresh water. The method employed in the research is the application of ASRRG technology by the injection of the largest possible volume of rainwater and monitor changes of electrical conductivity and geoelectrical resistivity. Installation of an ASRRG network proved effective in lowering the salinity of groundwater in small islands. By increasing pore volume from 30% to 60% salinity decreases by 77%, which is reflected by the effect that the fresh groundwater lens which before comprised brackish water became fresh water with a thickness of 2.5 meter. The gain in pore volume equaled the decrease in salinity.Key words: Artificial recharge, Island hydrology, Salt-water/fresh-water relations, Indonesia
UPAYA PENINGKATAN KUALITAS PELAYANAN PERIZINAN LEWAT INOVASI JEMPUT BOLA Kajian Deskriptif pada Dinas Penanaman Modal dan Pelayanan Terpadu Satu Pintu Kabupaten Semarang Provinsi Jawa Tengah Sudrajat, Yayat
Jurnal Politik Pemerintahan Dharma Praja Vol 12 No 1 (2019): Jurnal Politik Pemerintahan Dharma Praja
Publisher : Fakultas Politik Pemerintahan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (86.181 KB) | DOI: 10.33701/jppdp.v12i1.937

Abstract

Efforts to Improve Licensing Service Quality through Ball Pick Up Innovation. Descriptive Study on the Office of Investment and One-Stop Services in Semarang Regency, Central Java Province. This research is intended to find out how the innovation of licensing services by picking up the ball in improving the quality of licensing services at the Semarang One-Stop Service of Investment and Integrated Services. Other objectives are to find out the factors that hamper the path of innovation in pick-up licensing services and to find out the efforts made by the Semarang District One-Stop Investment Service and Integrated Services to improve the quality of licensing services. In this study the author uses the theory of Basuki Johanes (2013: 179) who sees public service innovation from relative benefits, suitability, complexity, the possibility of observable experiments. The method used in this research is inductive descriptive. Data collection is done by using interview methods, documentation, and observation. Data analysis techniques used include data reduction, data presentation and conclusion drawing. The results of the study showed that in the implementation of the licensing service innovation, picking up the ball had already been running but not yet maximally. It should be noted again about the location in implementing the licensing service for picking up the ball. The limiting factor that arises is the limited number of apparatus resources, the lack of facilities that support the innovation of ball picking licensing services, implementation that is not in accordance with standard operating procedures and lack of public awareness about the importance of licensing
IDENTIFICATION OF SEAWATER INTRUSION DISTRIBUTION PATTERNS USING 2D ELECTRICAL RESISTIVITY TOMOGRAPHY (ERT) DATA IN SEMARANG, INDONESIA Minarto, Eko; Utami, Amanda Rizky; Handayani, Lina; Sudrajat, Yayat
Indonesian Physical Review Vol. 8 No. 2 (2025)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v8i2.461

Abstract

Various environmental problems exist in the northern coast area of Semarang, Indonesia, including land subsidence, tidal flooding, increased chloride content in several monitoring wells, and salinity in resident wells. These issues indicate a decrease in groundwater quality caused by seawater intrusion. Sanitary and health issues have a significant impact on many environmental issues, including decreased soil fertility and building damage. The problem of seawater intrusion can be identified by the geoelectric resistivity method (multi-electrode dipole-dipole configuration). The aim of this research is to detect the presence of seawater intrusion in groundwater zones and determine the extent of its distribution to the mainland. Data collection was carried out along the western canal flood. The data obtained distribution of subsurface apparent resistivity values. Interpretation of the 2D cross-sectional model identified as a seawater intrusion zone with low resistivity (𝜌 < 3 Ω m) ranging from 0-2.600 m. Thick in the northward with a depth of 30-60 m and becomes thin in the south at 2.600 m. At a trajectory 2.600-7.000 m low resistivity is still found in a local spot. The result of the 2D cross-section model inversion shows very good result. Predicted data is quite close to the observed data shown by an average small RMS 2.37% - 4.11%. And shown by a fast convergence curve. The coastal area of Semarang is also found to be made up of five layers: alluvial soft clay, silt clay, sandy clay, granule sand, and coarse sand. These results fit with the well log data around the research area. Estimates of the distribution of seawater intrusion in more detail to the mainland need to be further investigated using other geophysical methods and testing of monitoring wells or resident wells around the research area for more accurate results.
Efektivitas Penggunaan Sistem Informasi Administrasi Kependudukan (SIAK) Pada Dinas Kependudukan Dan Pencatatan Sipil Kabupaten Subang Riki, Wicaksono Aditya; Melani, Melani; Iwa, Jatmika; Sudrajat, Yayat; Sumarna, Sumarna
The World of Public Administration Journal Volume 7 Issue 1, Juni 2025
Publisher : Fakultas Ilmu Administrasi Universitas Subang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37950/wpaj.v7i1.2358

Abstract

Abstrak Penelitian Efektivitas Penggunaan Sistem Informasi Administrasi Kependudukan (SIAK) bertujuan untuk mengetahui bagaimana Efektivitas Penggunaan Sistem Informasi Administrasi Kependudukan (SIAK) Pada Dinas Kependudukan dan Pencatatan Sipil Kabupaten Subang. Lokasi yang dijadikan objek penelitian yaitu Penggunaan Sistem Informasi Administrasi Kependudukan (SIAK) di Dinas Kependudukan dan Pencatatan Sipil Kabupaten Subang. Penelitian ini membahas tentang Efektivitas Penggunaan Sistem Informasi Administrasi Kependudukan (SIAK) dalam pengelolaan data secara online maka kelemahan dalam pengelolaan data secara konvensional dapat ditekan. Perkembangan teknologi informasi yang kian pesat kini menimbulkan suatu revolusi baru, yaitu peralihan dari sistem kerja yang konvensional ke era digital. Dalam penelitian ini penulis menggunakan metode penelitian deskriptif kualitatif melalui observasi dan wawancara, studi kepustakaan dan dokumentasi. Metode pengumpulan data diperoleh langsung dan dokumen diperoleh dalam bentuk peraturan-peraturan, sedangkan pengelolaan data dengan menganalisis hasil wawancara dan observasi. Hasil penelitian menunjukkan bahwa Efektivitas Penggunaan Sistem Informasi Administrasi Kependudukan (SIAK) Pada Dinas Kependudukan dan Pencatatan Sipil Kabupaten Subang belum efektif sesuai dengan teori pengukuran efektivitas menurut Martani dan Lubis. Hasil penelitian ini menunjukkan bahwa Dinas Kependudukan dan Pencatatan Sipil Kabupaten Subang memiliki sarana dan prasarana untuk menunjang keberlangsungan proses pelayanan yang diberikan, terkhusus bagi pelaksanaan SIAK. Sistem Informasi Administrasi Kependudukan sejauh ini sudah berjalan efektif di Dinas Kependudukan dan Pencatatan Sipil Kabupaten Subang. Pengelolaan SIAK oleh operator dalam menginput data kependudukan dengan didukung sarana dan prasarana yang cukup memadai sudah berjalan efektif. Kata kunci:  Efktivitas Organisasi, Sistem Informasi Administrasi Kependudukan
Mekanisme Pengangkatan Pegawai dalam Konsep Islam Sudrajat, Yayat; Adinda, Dhea; Putri, Andini; Rosiana, Irma; Suhendar, Fikry Ramadhan
Jurnal Tadbir Peradaban Vol. 4 No. 1 (2024): Jurnal Tadbir Peradaban
Publisher : Prodi Manajemen STIE Hidayatullah Depok

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55182/jtp.v4i1.377

Abstract

Penelitian ini menjelaskan tentang konsep Islam dalam pengangkatan pegawai agar perusahaan tidak salah pilih dalam mengankat pegawainya. metode yang digunakan dalam penelitian ini yaitu dengan menggunakan metodologi kualitatif dengan analisis deskriptif berupa sumber yang akurat seperti jurnal, buku-buku dan beberapa referensi di internet lainnya. Pembahasan tulisan ini menggambarkan bagaimana pandangan Islam mengenai mekanisme pengangkatan pegawai dalam konsep Islam, karyawan tetap dan karyawan kontrak, penetapan upah dalam persfektif Islam dan pengembangan kompetensi pelatihan. Dari pemaparan diatas perusahaan yang bergerak dibidang barang maupun jasa dapat menerapkan konsep Islam sebagai tolak ukur dalam menjalankan kegiatan perusahaan dan dapat dijadikan sebagai sumber daya manusia yang mempunyai kualitas.
Analisis Reformasi Tata Kelola Administrasi Pemerintahan (Studi Kasus Provinsi Jawa Barat) Sudrajat, Yayat
Ekonomis: Journal of Economics and Business Vol 8, No 2 (2024): September
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/ekonomis.v8i2.2169

Abstract

The challenges of governance in the era of globalization are becoming increasingly complex, particularly in West Java Province, which faces public demands for efficiency, transparency, and accountability in public services. Although governance reforms have been implemented, obstacles such as complex bureaucracy, a lack of accountability, and rapid socio-economic changes continue to impact service quality. This study aims to analyze the impact of administrative governance reforms on the efficiency of public services. The main focus of this research is on the changes in transparency and public participation resulting from the implemented reforms, as well as the primary challenges faced in their implementation, including bureaucratic obstacles and technology adoption. The research employs a qualitative approach. Data were collected through 30 in-depth interviews with 10 government officials, 10 business actors, and 10 members of the general public. Additionally, focus group discussions (FGDs) were conducted involving 8-12 participants to gain deeper insights into their experiences related to governance reforms. Data analysis was performed using a thematic approach. The findings indicate that governance reforms in West Java Province have accelerated public administrative services, particularly through digitalization, which has reduced processing times for permits. However, challenges remain, such as limitations in human resources and technology, resistance to change among civil servants, and discrepancies in policy implementation across regions. Therefore, enhancing employee training and simplifying bureaucratic procedures are essential to ensure the sustainability of these reforms.
Buying Motorcycles: What Part Does the Marketing Mix Play Tadjie, Gilang Sekar; Sudrajat, Yayat
Journal of Management Vol. 3 No. 1 (2024): January - June
Publisher : Yayasan Pendidikan Belajar Berdikari

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Abstract

The purpose of this study is to determine the extent to which motorcycle purchase decisions at PT. Daya Anugrah Mandiri Bandung are influenced by variables in the marketing mix. According to this study, a variety of factors influence consumers' decision to buy. From low fuel consumption, well-known brands, stylish looks, quantity and quality, limited edition models, and a host of other considerations. Additionally, it is quite challenging to pique consumers' interest in buying four-wheeled cars due to competition among marketers. Multiple linear regression is employed as an analytical tool for qualitative description, together with partial and simultaneous hypothesis testing. In this study, 45 respondents served as samples, and sampling was done using the Roscoe technique. The study's findings indicate that, according to the t test results, there isn't a positive or significant influence on any variable's ability to influence decisions made at PT. Daya Anugrah Mandiri Bandung about purchases.
Literasi Keuangan Masyarakat : Pemberdayaan Perempuan melalui Pelatihan Pengelolaan Keuangan Rumah Tangga Utiarahman, Nurnaningsih; Sudrajat, Yayat; Jayanto, Imam; Yulistina, Yulistina; Zulfikar, Zulfikar
JIPITI: Jurnal Pengabdian kepada Masyarakat Vol. 2 No. 4 (2025): November 2025 - JIPITI: Jurnal Pengabdian kepada Masyarakat
Publisher : PT. Technology Laboratories Indonesia (TechnoLabs)

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Abstract

Pemberdayaan perempuan dalam pengelolaan keuangan rumah tangga merupakan aspek strategis dalam meningkatkan kesejahteraan keluarga dan mendukung kemandirian ekonomi masyarakat. Kegiatan pengabdian ini bertujuan untuk meningkatkan literasi keuangan perempuan melalui pelatihan pengelolaan keuangan rumah tangga yang sistematis dan aplikatif. Pelaksanaan program dilakukan pada kelompok perempuan di lingkungan masyarakat yang memiliki peran sentral dalam pengaturan keuangan keluarga, namun masih menghadapi keterbatasan pengetahuan terkait perencanaan dan pengelolaan keuangan yang efektif. Metode pelaksanaan kegiatan meliputi penyampaian materi melalui ceramah interaktif, diskusi kelompok kecil, dan simulasi penyusunan anggaran keluarga. Selain itu, peserta diberikan pendampingan dalam penerapan konsep dasar literasi keuangan seperti perencanaan keuangan, pencatatan pendapatan dan pengeluaran, strategi menabung, serta manajemen risiko keuangan. Evaluasi dilakukan melalui pre-test dan post-test untuk mengukur peningkatan pemahaman serta melalui observasi terhadap kegiatan praktik penyusunan anggaran rumah tangga. Hasil kegiatan menunjukkan adanya peningkatan yang signifikan pada pemahaman peserta mengenai manajemen keuangan rumah tangga serta perubahan pola perilaku keuangan ke arah yang lebih terencana dan bijaksana. Peserta mampu menerapkan teknik pencatatan keuangan dan menyusun prioritas kebutuhan rumah tangga sesuai kemampuan finansial. Pelatihan ini menjadi langkah positif dalam memperkuat kapasitas perempuan sebagai pengelola ekonomi keluarga serta memberikan dampak sosial yang berkelanjutan terhadap kesejahteraan masyarakat.
Analisis Pengaruh Lingkungan Kerja Terhadap Kepuasan Kerja Karyawan Pada Perusahaan Ritel Di Jawa Barat Laelawati, Kania; fauzi, Haris; Sudrajat, Yayat
Management Studies and Entrepreneurship Journal (MSEJ) Vol. 7 No. 2 (2026): Management Studies and Entrepreneurship Journal (MSEJ)
Publisher : Yayasan Pendidikan Riset dan Pengembangan Intelektual (YRPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37385/msej.v7i2.10182

Abstract

Penelitian ini bertujuan untuk menganalisis pengaruh lingkungan kerja terhadap kepuasan kerja karyawan pada salah satu perusahaan ritel di Jawa Barat. Penelitian menggunakan pendekatan kuantitatif dengan desain deskriptif dan asosiatif. Populasi dalam penelitian ini berjumlah 55 karyawan tetap, dengan teknik pengambilan sampel menggunakan sampel jenuh sehingga seluruh populasi dijadikan responden. Pengumpulan data dilakukan melalui kuesioner yang disusun berdasarkan indikator lingkungan kerja dan kepuasan kerja, serta didukung oleh observasi dan wawancara untuk memperkuat informasi penelitian. Analisis data dilakukan menggunakan bantuan SPSS versi 26 melalui uji validitas, uji reliabilitas, uji korelasi Spearman, koefisien determinasi, dan uji hipotesis menggunakan uji t. Hasil penelitian menunjukkan bahwa seluruh item pernyataan dinyatakan valid dengan nilai r hitung lebih besar dari r tabel, serta reliabel dengan nilai Cronbach’s Alpha sebesar 0,948 untuk variabel lingkungan kerja dan 0,972 untuk variabel kepuasan kerja. Uji korelasi Spearman menghasilkan koefisien korelasi sebesar 0,916 yang menunjukkan hubungan positif sangat kuat antara lingkungan kerja dan kepuasan kerja. Koefisien determinasi menunjukkan nilai R Square sebesar 0,840 yang berarti lingkungan kerja berkontribusi sebesar 84 persen terhadap variasi kepuasan kerja, sedangkan 16 persen dipengaruhi faktor lain di luar penelitian. Uji hipotesis menunjukkan nilai t hitung sebesar 16,658 dengan signifikansi 0,000 lebih kecil dari 0,05 sehingga dapat disimpulkan bahwa lingkungan kerja berpengaruh positif dan signifikan terhadap kepuasan kerja karyawan. Implikasi penelitian menegaskan pentingnya perbaikan lingkungan kerja fisik dan non fisik sebagai strategi peningkatan kepuasan kerja karyawan pada sektor ritel.
Co-Authors Adinda, Dhea Ananta Purwoaminta, Ananta Andini Putri, Andini Baehaqi Edi Prasetyo Utomo, Edi Prasetyo Endar Widi Sugiyo, Endar Widi FAUZI, HARIS Fikry Ramadhan Suhendar Gilang Sekar Tadjie Iwa, Jatmika Jayanto, Imam Laelawati, Kania Lina Handayani Melani Melani Riki, Wicaksono Aditya Rosiana, Irma Sumarna Sumarna Utami, Amanda Rizky Utiarahman, Nurnaningsih Yulistina Yulistina Zulkarnaini Zulkarnaini