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PENDUGAAN NILAI TAHANAN JENIS BATUAN UNTUK MENGETAHUI STRUKTUR GEOLOGI PADA ENDAPAN VULKANIK DI KEC. PADARINCANG, PROVINSI BANTEN. Endyana, Cipta; Hirnawan, Febri; Hendrawan, Hendrawan; Mardiana, Undang
Buletin Sumber Daya Geologi Vol 6, No 3 (2011): Buletin Sumber Daya Geologi
Publisher : Buletin Sumber Daya Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6143.995 KB)

Abstract

Pendugaan nilai-nilai tahanan jenis batuan menggunakan metode Schlumberger merupakan pendekatan yang efektif untuk menduga kondisi batuan bawah permukaan. Penggunaan teknik interpolasi danpengelompokkan nilai tahanan jenis lebih lanjut dapat menafsirkan kontinuitas lateral jenis batuan dan struktur geologi.Pengolahan dan pengujian secara statistik  analisis regresi berganda pada nilai tahananjenis menghasilkan enam jenis kelompok batuan, yaitu: Breksi grain supported, Tuf Lapili, Tuf Kasar, Breksi grain supported, tuf lapili, breksi matrix supported. Hasil uji korelasi pada karakter tahanan jenis keenam kelompok batuan tersebut ditemukan bahwa ada tiga sumber material yang berbeda pada saat pengendapannya. Material endapan diyakini berasal dari Gunung Parakasak, Gunung Karang dan Gunung Kamuning. Kesamaan nilai tahanan jenis pada pola berarah barat-timur menunjukkan kesamaan litologi, sedangkan kesamaan nilai tahanan jenis pada pola dengan arah utara-selatan menunjukkan nilai kontras tahanan jenis yang disebabkan oleh dua jenis sesar berarah relatif barat-timur dengan mekanisme yang berbeda.
PERFORMANCE EVALUATION OF A2-A4-RSRQ AND A3-RSRP HANDOVER ALGORITHMS IN LTE NETWORK Hendrawan, Hendrawan; Zain, Ayu Rosyida; Lestari, Sri
Jurnal Elektronika dan Telekomunikasi Vol 19, No 2 (2019)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jet.v19.64-74

Abstract

In LTE Network, users can move freely in the network through fast and seamless handover (HO). This research focuses on intra-LTE handover which occurs using interface X2 to move an EU between two eNBs, i.e. source eNB and target eNB without any changes in MME and SGW at EPC level. Two popular algorithms of intra-LTE handover namely A2-A4-RSRQ and A3-RSRP were evaluated and compared through simulations as well as direct measurements in the field. Simulation is conducted using NS3 simulation tool where performances of various scenarios from both algorithms were evaluated. The performance metrics studied include the average number of HOs that occur, throughput and optimized ratio. Simulations carried out for various scenarios in term of EU numbers, user speeds, and channel conditions. In addition, the results of one-month measurement of three eNBs were also presented. The measurement results are then compared and used to verify the simulation results. Furthermore, by using the optimizing ratio metric, the optimal pair of parameter values of Threshold as well as Offset and Handover Margin (HOM) along with Time-to-Trigger (TTT) are sought for the A2-A4-RSRQ and A3-RSRP respectively.
Eksperimen Estimasi Biaya Proyek Perangkat Lunak Menggunakan Metode Function Point Analysis (FPA) Hendrawan, Hendrawan; Jusia, Pareza Alam; Rasywir, Errissya; Pratama, Yovi
JURIKOM (Jurnal Riset Komputer) Vol 6, No 4 (2019): Agustus 2019
Publisher : STMIK Budi Darma

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (217.06 KB) | DOI: 10.30865/jurikom.v6i4.1329

Abstract

In building software, it should start with project planning. This activity is initialized with estimation activity. When estimation is done, it is necessary to make predictions in the future and handle the uncertainty that will be passed in running a software project. There are several options in project estimation. However, in this study, we used the most common and familiar technique to be tested on project data that had been running in the field. From the results of experiments conducted in the study on 20 (twenty) data software development projects in one of the software houses in Jambi city using the Function Point Analysis (FPA) method, the results of the calculation of the RMSE (root mean squared error) of Rp 1,073,001, - and an error value of 0.25. This means that it can be concluded that the difference in RMSE from the real price comparison transacted in the field with the price estimated using the Function Point Analysis (FPA) method is equal to the value mentioned above, which value includes a value with a fairly small gap. As well, the error value produced is also quite small at 0.25.
Internet Congestion Control System Rusmin, Pranoto Hidaya; Machbub, Carmadi; Harsoyo, Agung; Hendrawan, Hendrawan
Makara Journal of Technology Vol. 12, No. 1
Publisher : UI Scholars Hub

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Abstract

Internet Congestion Control System. Internet congestion occurs when resource demands exceeds the network capacity. But, it is not the only reason. Congestion can happen on some users because some others user has higher sending rate. Then some users with lower sending rate will experience congestion. This partial congestion is caused by inexactly feedback. At this moment congestion are solved by the involvement of two controlling mechanisms. These mechanisms are flow/congestion control in the TCP source and Active Queue Management (AQM) in the router. AQM will provide feedback to the source a kind of indication for the occurrence of the congestion in the router, whereas the source will adapt the sending rate appropriate with the feedback. These mechanisms are not enough to solve internet congestion problem completely. Therefore, this paper will explain internet congestion causes, weakness, and congestion control technique that researchers have been developed. To describe congestion system mechanisms and responses, the system will be simulated by Matlab.
Peran dan Pengawasan Keimigrasian dalam Menghadapi Ancaman Kedaulatan Negara Hendrawan, Hendrawan; Siregar, Lidya Marsaulina; Shatrya, Maulana
JIIP - Jurnal Ilmiah Ilmu Pendidikan Vol. 5 No. 12 (2022): JIIP (Jurnal Ilmiah Ilmu Pendidikan)
Publisher : STKIP Yapis Dompu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (497.471 KB) | DOI: 10.54371/jiip.v5i12.1184

Abstract

Keimigrasian adalah proses masuk atau keluar wilayah Indonesia beserta pengaturannya untuk menjaga keamanan negara (Undang-Undang Nomor 6 Tahun 2011). Adanya orang asing yang masuk ke wilayah Negara Kesatuan Republik Indonesia dengan berbagai alasan mengharuskan negara menerapkan peraturan keimigrasian bagi semua orang asing yang, yakni kebijakan selektif. Penelitian ini bertujuan untuk mengetahui peran pengawasan keimigrasian dalam mengatasi ancaman kedaulatan negara yang ditimbulkan oleh orang asing yang memasuki wilayah Indonesia. Penelitian menggunakan pendekatan deskriptif dan data sekunder dari buku, jurnal, artikel, tesis, internet, dan mengambil dari berbagai sumber literatur. Berdasarkan temuan penelitian ini, peran keimigrasian adalah untuk menegakkan pengawasan terhadap orang asing yang berada di wilayah Negara Kesatuan Republik Indonesia dan yang perbuatannya sedang melanggar hukum. Upaya hukum tambahan meliputi pencegahan dan penangkalan, yang dikeluarkan oleh Direktorat Jenderal Imigrasi di bawah kewenangan Kementerian Hukum dan Hak Asasi Manusia dan meminimalkan ancaman kepemilikan negara.