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PREDIKSI PARAMETER-PARAMETER BIOFISIK TANAMAN PADI DARI DATA GROunDSPECTROmETER DAN HYPERSPECTRAL PESAWAT TERBANG DENGAN MENGGUNAKAN TEKNIK PARTIAL LEAST SquARE REGRESSIOn (PLSR) DAN nORmALIzED DIFFEREnCE SPECTRAL InDEx (NDSI)
Darmawan, Arief;
Hariyanto, Teguh;
Sukojo, Bangun Muijo;
Sadly, Muhamad
Jurnal Teknologi Lingkungan Vol. 12 No. 1 (2011)
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology
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DOI: 10.29122/jtl.v12i1.1266
Paddy rice canopy hyperspectral was measured by using ground-based spectroradiometer and HyMap sensor onboard an airplane from 350 nm up to 2500 nm in the same timethat covered various growth stages. Coinciding with hyperspectral measurement, biophysical parameters such as leaf area index (LAI), SPAD value were measured onground during the airplane passed over area of interest (AOI). Rice yield was measured at the time of final harvesting by random selected yield (ubinan method) for each sampling area. In finding the best correlation among canopy hyperspectral reflectance with crop development, optimal individual waveband explored with involving all possible waveband combinations to obtain the best fitted two-pair waveband related to crop biophysical parameters. Normalized Difference Spectral Index (NDSI) was appliedfrom spectral transformations (obtained from optimal waveband selected by exploring all possible waveband) to improve sensitivity analysis on plant. Canopy hyperspectralprovided information about plant, soil and water background when plant canopy don’t completely cover soil surface yet. The present study was directed to examine spectralindices and establish the relationships between biophysical parameters of rice by using partial least square regression (PLSR) technique.ÂÂ
PENERAPAN SISTEM MANAJEMEN MUTU ISO 9001 PADA KONTRAKTOR PT. X
Darmawan, Arief;
Wacono, Sidiq;
Saputra, Jonathan
Construction and Material Journal Vol 2, No 3 (2020): CONSTRUCTION AND MATERIAL JOURNAL VOL. 2 NO. 3 NOVEMBER 2020
Publisher : Politeknik Negeri Jakarta
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ABSTRACTInfrastructures development in Indonesia is experiencing a high increase. However, many construction failures were due to construction that was not following the predetermined quality. Data obtained from the Investigation of the PNK Technical Team in 2013 contained 5 cases of construction project failure handled by the authorities with a total loss of more than 5 billion to the state. The reality shows that many construction service businesses have names but do not have the supporting facilities. Therefore, data collection aims to analyze the application of the ISO 9001: 2015 application quality management system and its application constraints. Processing data use descriptive statistical analysis and using SPSS version 25 software. The data testing techniques used include validity, reliability, and descriptive hypothesis. The data was collected using a questionnaire method for construction employees in the Design Project for the Tanjung Barat Station Flats. This analysis indicates that the application of the ISO 9001: 2015 quality management system by taking into account all the points from clause 4 to clause 10 is 85.19% and is in the excellent category (80-100%). Factors that become obstacles in implementing ISO 9001: 2015 are due to the lack of socialization regarding the application of ISO 9001, documented information, and communication between project teams.Keywords : ISO 9001; ISO 9001:2015; Quality Management System.ABSTRAKPerkembangan infrastruktur di Indonesia sedang mengalami peningkatan yang tinggi. Tetapi, banyak ditemui kegagalan konstruksi yang disebabkan oleh pelaksanaan konstruksi yang tidak sesuai dengan kualitas yang sudah ditetapkan. Data yang diperoleh dari Investigasi Tim Teknis PNK pada tahun 2013 menunjukkan 5 kasus kegagalan proyek konstruksi yang ditangani pihak berwajib dengan nilai kerugian negara mencapai lebih dari 5 milyar. Kenyataan menunjukkan banyak usaha jasa konstruksi yang memiliki nama tetapi tidak memiliki fasilitas yang mendukung. Oleh karena itu, dilakukan pengambilan data yang bertujuan untuk menganalisis penerapan sistem manajemen mutu ISO 9001:2015 dan faktor kendala dalam penerapannya. Pengolahan data menggunakan uji hipotesis deskriptif dan menggunakan bantuan software SPSS versi 25. Teknik pengujian data yang digunakan meliputi uji validitas, uji reliabilitas dan hipotesis deskriptif. Pengumpulan data dilakukan menggunakan metode kuesioner terhadap karyawan konstruksi yang terlibat dalam Proyek Rancang Bangun Rumah Susun Stasiun Tanjung Barat. Hasil analisis ini menunjukkan bahwa penerapan sistem manajemen mutu ISO 9001:2015 dengan memperhatikan seluruh butir dari klausul 4 sampai klausul 10 adalah sebesar 85,19% dan masuk kategori sangat baik (80-100%). Faktor yang menjadi kendala dalam penerapan ISO 9001:2015 adalah akibat kurangnya sosialisasi mengenai penerapan ISO 9001, informasi terdokumentasi, dan komunikasi antar tim proyek.Kata kunci : ISO 9001; ISO 9001:2015; Sistem Manajemen Mutu.
Efektivitas Pelatihan Split Squat Jump Terhadap Ketepatan Spike Bola Voli
Abidin, Dindin;
Darmawan, Arief;
Bujang, Bujang
Jurnal SPORTIF : Jurnal Penelitian Pembelajaran Vol 6 No 3 (2020): Jurnal SPORTIF: Jurnal Penelitian Pembelajaran
Publisher : Universitas Nusantara PGRI Kediri
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DOI: 10.29407/js_unpgri.v7i1.14771
Spike merupakan salah satu teknik serangan pada permainan bolavoli yang sangat penting untuk ditingkatkan, karena spike merupakan salah satu cara untuk mendapatkan poin dan kemenangan. Penelitian ini bertujuan untuk membahas efektivitas pelatihan split squat jump sebagai alternatif pengembangan teknik ketepatan spike. Penggunaan metode penelitian yang digunakan jenis eksperimen (one-group pretest-posttest design) dan populasinya adalah keseluruhan anggota ekstrakulikuler SMK PGRI Karisma Bangsa dengan jumlah 30 siswa. Uji prasyarat normalitas dan homogenitas dilalui, menghasilkan data berdistibusi normal serta homogen. Kemudian analisis deskriptif dan kelanjutan model statistik efektivitas memakai uji-t, menghasilkan penjelasan bahwa setelah mengikuti pelatihan split squat jump mengalami peningkatan ketepatan teknik spike 77,77% dan program pelatihan split squat jump membeikan efek positif signifikan (thitung = 10,78 > ttabel = 1,679) terhadap ketepatan spike bolavoli dan menjadi alternatif untuk program pelatihan atlet dalam meningkatkan teknik spike bolavoli di Indonesia.
Penyuluhan Kesehatan dan Donor Darah Mewujudkan Masyarakat Desa Peduli Pencegahan COVID-19
Triwijaya, Santi;
Darmawan, Arief;
Puspitasari, Mariana Diah;
Feriando, Dara Aulia;
Iswanto, Ary Putra
JPP IPTEK (Jurnal Pengabdian dan Penerapan IPTEK) Vol 5, No 1 (2021)
Publisher : LPPM ITATS
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DOI: 10.31284/j.jpp-iptek.2021.v5i1.1425
Upaya perintah dalam mencegah penyebarluasan penularan virus COVID-19 masyarakat diwajibkan untuk mematuhi protocol kesehatan. Program pengabdian masyrakat yang di laksanakan oleh Politeknik Perkereta Apian Indonesi untuk meningkatkan pengetahuan dan pemahaman masyarakat untuk nenikiki kesadaran tinggi untuk memathui protocol keseahatan melalui Mencuci tangan, Memakai masker, dan Menjaga jarak (3M). Kesadaran masyarakat akan protokol kesehatan berupa rajin mencuci tangan, memakai masker dan menjaga jarak (3M) dapat mencegah penularan virus COVID-19. Selain kegiatan tersebut juga di adakan kegitan berupa donor darah untuk membantu rumah sakit dan puskesmas dalam menyediakan stok darah di masa pandemic. Metode pelaksanaan adalah dengan penyuluhan tentang perilaku 3M untuk mencegah penularan virus COVID-19, Pemeriksaan gratis dan donor darah, Dialog interaktif perilaku 3M dan praktik 3M untuk anak2. Kegiatan ini melibatkan seluruh masyarakat desa Manisrejo berjumlah 120 rumah tangga. Hasil kegiatan menunjukkan adanya peningkatan pengetahuan dan kesadaran masyarakat akan pentingnya 3M dan anak-anak mampu untuk melakuan 3M dengan benar.
Analisis Sebaran Total Suspended Matter dan Klorofil-a di Wilayah Pesisir Prigi dengan Menggunakan Penginderaan Jauh
Zakiyah, Umi;
Darmawan, Arief;
Lazuardi, Dian Senja
Jurnal Perikanan dan Kelautan Vol 25, No 2 (2020)
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau
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DOI: 10.31258/jpk.25.2.88-93
Total Suspended Matter (TSM) dan klorofil-a merupakan parameter kualitas air yang dapat dipetakan dengan penginderaan jauh. Nilai TSM yang tinggi dapat mempengaruhi klorofil-a dalam fitoplankton untuk berfotosintesis. Penelitian ini bertujuan untuk menganalisis sebaran, akurasi, serta hubungan antara parameter TSM dan klorofil-a berdasarkan data in situ dan data citra di perairan Pesisir Prigi. Metode yang digunakan dalam penelitian ini yaitu metode deskriptif. Data yang digunakan adalah citra Landsat 8 tanggal 20 Mei 2018 dan sampel in situ yang diambil dengan menggunakan teknik purposive sampling di 9 lokasi pada tanggal 19 Mei 2018. Dari penelitian ini didapatkan hasil nilai TSM in situ berkisar 41-64 ppm, nilai TSM citra berkisar 44–65 ppm, nilai klorofil-a in situ berkisar 1,15-2.68 mg/m3, dan nilai klorofil-a citra berkisar 1,24-2,41 mg/m3. Dari hasil data in situ dan citra didapatkan akurasi sebesar 74,37% untuk TSM dan 80,33% untuk klorofil-a. Nilai hubungan TSM dan klorofil-a adalah y= -0.045x + 3.9103 dengan nilai koefisien 85%, yang artinya variabel X yaitu TSM mempengaruhi variabel Y yaitu klorofil-a. Kesimpulan dalam penelitian ini adalah perairan Pesisir Prigi memiliki nilai yang berada pada ambang batas masing – masing parameter, sehingga perairan Pesisir Prigi tergolong baik. Akurasi yang tinggi antara data citra dan data in situ menunjukkan metode penginderaan jauh sesuai untuk digunakan di wilayah perairan Pesisir Prigi.
Perancangan Sistem Otomatis Pendeteksi Perawatan Sarana Kereta Api
Rachman, Natriya Faisal;
Darmawan, Arief
Jurnal Perkeretaapian Indonesia (Indonesian Railway Journal) Vol 2 No 2 (2018): Jurnal Perkeretaapian Indonesia Volume 2 Nomor 2 Tahun 2018
Publisher : Politeknik Perkeretaapian Indonesia Madiun
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DOI: 10.37367/jpi.v2i2.19
The use of android now not only acts as a means of communication for the community, but also very active role in the dissemination of information quickly and easily. With the current situation which is very practical, in this study, the design of a motorcycle safety history database was designed using android-based QRcode method. Because previously the executor still used the check list sheet, with the design of the Android-based barcode method, the executor did not need to see the data in the archive or add data through the check list sheet. The design of the andoid-based money order motor maintenance database was made in three stages, namely the creation of a database using Firebase. Making android as an interface using Android Studio and making code scanning with QRcode. Data displayed in real time, i.e. data can update data by other devices automatically so that data can be recorded and stored. Data can be opened on more than two devices that have an application installed, provided that the device must scan the QRcode. From the results of testing of the database design that has been made, it can be concluded that the android-based database system can speed up the process of data retrieval compared to taking attendance manually which is the archive of maintenance results. This system can only be used if the device used is on an internet network connection.
Anti-Collition Device (ACD) Lokomotif Diesel Electric Seri CC201 Dengan Induksi Dual Tone Multiple Frequency (DTMF)
Darmawan, Arief;
Winjaya, Fathurozzi
Jurnal Perkeretaapian Indonesia (Indonesian Railway Journal) Vol 2 No 2 (2018): Jurnal Perkeretaapian Indonesia Volume 2 Nomor 2 Tahun 2018
Publisher : Politeknik Perkeretaapian Indonesia Madiun
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DOI: 10.37367/jpi.v2i2.51
Railroad transportation has characteristics in the pattern of operation that a block block is only allowed to be passed by a train facility whose safety is guaranteed by the railroad signaling system. The existing signaling system in Indonesia currently uses a wayide signal aspect indicator and has not been equipped with a warning and protection system against violations of the unsafe signal aspect / SPAD (Signal Pass At Danger) or speed limit violations. To improve travel safety absolutely requires warning equipment for drivers about violations of signal aspects and violations of speed restrictions. This study discusses the calculation of the braking profile on the CC201 series electric locomotive and the Anti-Collition Device (ACD) prototype design using the Audio Frequency (AF) induction system using Dual Tone Multiple Frequency (DTMF) coding as well as the Atmel AT89S52 type Microcontroller control system. Based on the analysis of the braking distance at a speed of 120 Km / h using the minden method, the AF sensor is installed at a distance of 1,168.79 meters before the incoming signal. Based on the measurement results of the signal intensity received by the DTMF locomotive sensor, the biggest signal is at the gap gap between the AF sensors with a distance of 80 mm, while for the lowest reading level at a distance of 120mm.
Desain Penguncian Pintu Perlintasan Sebidang Jenis Manual Operation Pln-Power Menggunakan Elektromagnet
Rachman, Natriya Faisal;
Darmawan, Arief;
Imami, Fandhi Dwi
Jurnal Perkeretaapian Indonesia (Indonesian Railway Journal) Vol 3 No 1 (2019): Jurnal Perkeretaapian Indonesia Volume 3 Nomer 1 Tahun 2019
Publisher : Politeknik Perkeretaapian Indonesia Madiun
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DOI: 10.37367/jpi.v3i1.71
A level crossing is a level crossing between a railroad track and a highway. In conditions on the ground, road users often violate their way through crossing lintels. The purpose of this research is to create a locking system using electromagnets and warning sound indications in order to hold the doorstop so that it cannot be lifted manually by violators who will break through the crossing doorstop. This study consists of several stages, namely the analysis of the needs of the components making tools, the process of making tools, testing tools, and analyzing test result data. The components used in this research are Ultrasonic Sensor, Infrared Sensor, Voice Recorder Module, Relay, Amplifier, Speaker Horn, and Electromagnetic Circuits. All tool designs are able to activate the Electromagnet circuit when the crossing door arm position is 30 cm from the sensor, and are able to activate the warning sound indication when the crossing door arm is lifted manually
Perancangan Kursi Roda Naik Tangga Pada Stasiun Sebagai Alat Bantu Orang Berkebutuhan Khusus
Winjaya, Fathurrozi;
Darmawan, Arief
Jurnal Perkeretaapian Indonesia (Indonesian Railway Journal) Vol 4 No 2 (2020): Jurnal Perkeretaapian Indonesia Volume 4 Nomor 2 Tahun 2020
Publisher : Politeknik Perkeretaapian Indonesia Madiun
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DOI: 10.37367/jpi.v4i2.88
Intelligent wheelchairs are motorized resting media designed to help users with physical limitations, where an artificial control system is added or used to replace user controls. The aim is to reduce or eliminate the user's duty to drive a motorized wheelchair. At the station there are still many places that are still not accessible by persons with disabilities. As the difference between platform and train height, usually there are stairs that support to enter the train. Therefore the writer makes an innovation so that it can make it easier for people with disabilities to move up stairs in a wheelchair. The design of the wheelchair design uses a crawler type with the help of universal plates from Tamiya, the gearbox uses Twin Motor with a rotation ratio of 204: 1. Servo motor mounted on the seat which is supported by a gyro sensor as a counterweight to the chair when the position of the chair up or down. In the DC motor and servo PID method is added so that the motion changes can be smooth. PID is installed when testing the equilibrium results obtained a little stable oscillation at Kp = 0.27, Ki = 0.0004, and Kd = 0.0001, while when testing the speed obtained the most stable conditions at Kp = 2, Ki = 1, Kd = 0.25.
Rancang Bangun Turbin Angin Aksis Vertikal Sebagai Alternatif Catu Daya Pada Perlintasan Sebidang Perkeretaapian
Darmawan, Arief;
Winjaya, Fathurrozi
Jurnal Perkeretaapian Indonesia (Indonesian Railway Journal) Vol 3 No 2 (2019): Jurnal Perkeretaapian Indonesia Volume 3 Nomer 2 Tahun 2019
Publisher : Politeknik Perkeretaapian Indonesia Madiun
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DOI: 10.37367/jpi.v3i2.115
Level crossing security gate equipment is a railroad operating facility that requires an electrical energy source. The use of fossil fuels as fuel for power plants is running low, according to estimates the amount of fossil fuel reserves will be exhausted in about 83 years. To save fossil fuel reserves, we need a backup energy source from renewable energy sources such as wind energy. Wind energy around the railroad track has enormous potential to be used as electrical energy. Micro wind electricity builders in this study use wind turbines with vertical blades and wind directors in the form of fins. Based on the results of research and testing it can be concluded that the vertical wind turbine that is implemented to supply crossing door safety equipment can charge batteries with an average charging current of 3.28 A at an average wind speed of 3.90 m / s and rotation of 278 rpm and produces 39.45 watts of power and 394.5 watts of total energy so that it can charge a 75Ah / 12 volt battery for 22 hours