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All Journal Jurnal Teknik Industri Rotasi Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Jurnal Studi Manajemen Organisasi IPTEK The Journal for Technology and Science Biosfer: Jurnal Tadris Biologi Rekayasa Mesin JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI Semesta Teknika Media Mesin: Majalah Teknik Mesin Forum Geografi Jurnal Teknik Sipil BERITA BIOLOGI Journal of Energy, Mechanical, Material and Manufacturing Engineering Conference SENATIK STT Adisutjipto Yogyakarta Jurnal Pengabdian Masyarakat AbdiMas Jurnal STIE Semarang (Edisi Elektronik) Humaniora Jurnal Ilmiah Teknik Mesin "MEKANIK" Matriks Teknik Sipil
Indarto Indarto
Laboratorium Teknik Pengendalian Dan Konservasi Lingkungan (TPKL), PS Teknik Pertanian, FTP – UNEJ, Jl. Kalimantan No. 37 Kampus Tegalboto, Jember, 68121.
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Study on The Physical Characteristics and Hydrology of 15 Watershed in East Java Indarto, Indarto
Forum Geografi Vol 27, No 2 (2013): December 2013
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v27i2.2374

Abstract

The study demonstrated the application of statistical method to describe physical and hydro-meteorological characteristics by means of time series analysis.  Fifteen(15) watersheds in East Java were selected for this study. Data input for the analysis include: physical data, rainfall and discharge. Physical data of the watershed (topography, river network, land use, and soil type) are extracted from existing database and treated using GIS Software. Daily rainfall data were collected from existing pluviometers around the region. Daily discharge data were obtained from measurement station located at the outlet of each watershed. Areal Rainfall for each watershed was determined using average value of existing pluviometers around the watershed and determined using simple arithmetic method. These time series data are then imported to RAP (River Analysis Package).  Analysis on the RAP, include: general statistical, flow duration curve (FDC), and baseflow analysis. The result then presented in graphic and tables. Research shows that among the watersheds have different physical and hydrological characteristics.
The Visualization Study on the Slug Flow Mechanisms of the Air-Water Two-Phase in a 50 mm Horizontal Pipe Dinaryanto, Okto; Hudaya, Akhmad Zidni; Deendarlianto, Deendarlianto; Indarto, Indarto
SENATIK STT Adisutjipto Vol 4 (2018): Transformasi Teknologi untuk Mendukung Ketahanan Nasional [ ISBN 978-602-52742-0-6 ]
Publisher : Sekolah Tinggi Teknologi Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (560.273 KB) | DOI: 10.28989/senatik.v4i0.171

Abstract

The slug flow phenomena are often encountered in various industrial applications such as petroleum, process, and power plant. The presence of slug flow should be avoided as it causes structural damage due to resonance, corrosion and pipes blast. From the view point of multiphase flow, the understanding of the slug initiation mechanism is very important in pipeline design. This research is conducted using horizontal transparent acrylic pipes with diameters of 50 mm with a variation on the superficial velocity of water between 0,1 m/s and 0,77 m/s and superficial velocity of air between 0,31 m/s and 6,2 m/s. In the present experimental study, the slug initiation mechanisms was explained by visual observation by using high speed video cameras. As the results, the slug flow initiation mechanism were clarified. Furthermore, the proposed of flow initiation map was introduced.
Preliminary Assessment of Morphometric and Hydrological Properties of Six Watersheds in the Eastern Part of East Java Indarto, Indarto; Hidayah, Entin
Forum Geografi Vol 33, No 1 (2019): July 2019
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v33i1.7858

Abstract

A hydrological process on the watersheds is driven by rainfall as the input. Physical properties  also affect the magnitude response of the watershed to produce run-off. This paper presents the identification, assessment and visualisation of morphometric and hydrological properties of the watersheds.  Six watersheds in the eastern part of East Java were used for the analysis.  Physical characteristics obtained by cropping the GIS layer with a watershed. Topographic and morphometric properties of the watersheds derived from the ASTER G-DEM2. Furthermore, hydrological properties are derived statistically by analysing available rainfall and discharge data. Hydrological data (rainfall and discharge) are available from 1996 ? 2014.  Finally, simple statistical analysis by plotting obtained values are used to interpret the relation between morphometric and hydrological properties of the watersheds. The results show the quantitative number (unit) to describe the morphometric and hydrological properties of the six watersheds that can be used for watershed classification.
PENGARUH PERENDAMAN LARUTAN ETHREL TERHADAP KECEPATAN MASAK DAN KUALITAS BUAH PISANG AMBON (MUSA PARADISIACA LINN.) SETYOWATI, N.; INDARTO, INDARTO
BERITA BIOLOGI Vol 3, No 7 (1987): (Supplement)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (269.773 KB) | DOI: 10.14203/beritabiologi.v3i7.1373

Abstract

N. SETYOWATMNDARTO,1987.The effect of dipping in Ethrel solution on ripening rate and quality of pisang Ambon (Musa paradisiaca LINN) fruits. Suppl.Berita Biologi 3 : 20 - 25.The solution of ethrel for dipping were 750 pprn, 1000 ppm and it were dipped for 2, 4, 8 minutes and control (untreated).The results showed that the treatment accelerated the ripening of pisang Ambon faster 9-1 1 days than control.These werehighly significant difference according to Duncan's multiple range test, P = 1%.The observation indicated that the colour changes,firmness and vitamin C contents did not significanly difference compared to control on every stage of the ripening So that to accelerate ripening of pisang Ambon was recommended to use 750 ppm ethrel solution for 2 minutes.
Identifikasi Problematika Pelacuran dalam Perspektif Hukum Indarto, Indarto
Humaniora Vol 6, No 4 (2015): Humaniora
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/humaniora.v6i4.3388

Abstract

Prostitution is a classic social problem existed continuously as though it is difficult to eradicate. It makes the topic on prostitution becomes interesting to discuss. This paper identified the problem of prostitution from the viewpoint of positive law and empirical reality in society. By combining normative and empirical studies, the article aims to provide an overview of the problem of prostitution more clearly. From the library resarch, it is found various types of prostitution occur. In addition, the motivation to commit prostitution was not solely caused by economic motives, but there were other motives such as drug abuse, for instance. To keep prostitution is not rampant, it is not solely relying on legal instruments, but the role and function of the family is important. Therefore, the problem of prostitution is not simply seen from one point of view, there are other factors as its cause. 
ANALISIS KURVA PENDIDIHAN DALAM CELAH SEMPIT VERTIKAL UNTUK KASUS BILATERAL HEATING BERDASARKAN PERUBAHAN TEMPERATUR AWAL PLAT Catrawedarma, IGN Bagus; Indarto, Indarto; Juarsa, Mulya; Handoyo, Ismu; Kiswanta, Kiswanta
MEKANIK: Jurnal Ilmiah Teknik Mesin Vol 1 No 2 (2015): November 2015
Publisher : Jurusan Teknik Mesin, Fakultas Teknologi Industri, Institut Teknologi Medan (ITM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (585.396 KB)

Abstract

Analisis perpindahan kalor pendidihan untuk mengetahui pengaruh temperatur awal plat utama terhadap karakteristik pendidihan yang meliputi waktu rewetting, pola rewetting, fluks kalor, serta Critical Heat Flux (CHF) telah dipelajari berdasarkan kurva pendidihan dan fluks kalor yang dihitung dari transien temperatur permukaan plat, yang merupakan hasil eksperimen dengan menggunakan 2 plat vertikal dengan celah sempit antar plat utama dan penutup adalah 1 mm. Debit dan temperatur air pendingin ditetapkan sebesar 0,09 lt/detik dan temperatur saturasi. Temperatur awal plat utama divariasikan dari 500oC, 550oC, dan 600oC. Hasil analisis menunjukkan bahwa waktu rewetting terendah sebesar 30 sekon dan tertinggi sebesar 290 sekon. CHF tertinggi sebesar 750 kW/m2 dan terendah sebesar 400 kW/m2. Semakin tinggi temperatur awal plat, maka semakin lama waktu rewettingnya. Perubahan temperatur awal plat utama tidak mempengaruhi pola rewetting. Semakin tinggi temperatur awal plat, maka nilai CHF-nya semakin rendah. Daerah didih film tidak sesuai dengan kasus pool boiling. Pada daerah transisi, semakin rendah temperatur awal plat, maka semakin mendekati korelasi Murase (2001). Nilai CHF mendekati korelasi Leinhard. dkk (2002). Titik Leidenfrost sesuai dengan korelasi Zuber (1958). Daerah didih inti mendekati korelasi Murase (2001) untuk superheat vapor.
Fenomena Hydraulic Jump Look Like Dan Onset Of Flooding Dalam Pipa Vetikal Mahmuddin, M; Kamal, Samsul; Indarto, Indarto; Purnomo, P
Jurnal Teknik Industri Vol 12, No 2 (2011): Agustus
Publisher : Department Industrial Engineering, University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1661.251 KB) | DOI: 10.22219/JTIUMM.Vol12.No2.182-191

Abstract

Experiments have been conducted on countercurrent flow of air and water in pipe of 24 mm diameter. Flow patterns observations, measurement of the pressure gradient and film thickness conducted at water Reynolds numbers (ReL) are varied 322, 465, 630 and 709 combined to injected air with velocity from 1.845 m/s to 6.148 m/s at a distance of 400 mm, 1600 mm and 2200 mm from the water inlet. The data showed that the pressure gradient and film thickness did not increase appreciably until just before the onset of flooding. Otherwise, when flooding conditions wave propagation in surface the film flow from the bottom of air inlet, increasing film thickness gradually and pressure gradient also increase quickly. Increasing film thikcness gradually indicated as phenomenon hydraulic jump look like.
PEMISAHAN ALIRAN KEROSEN-AIR (Pada Variasi Sudut Kemiringan Side Arm vertikal keatas) Puspitasari, Dewi; Indarto, Indarto; Purnomo, Purnomo; Khasani, Khasani
ROTASI VOLUME 14, NOMOR 2, APRIL 2012
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1340.945 KB) | DOI: 10.14710/rotasi.14.2.11-16

Abstract

Penelitian mengenai pemisahan fase air-kerosen yang melewati T-junction telah dilakukan. Hasil pemisahan fase akan diamati dengan mengubah sudut kemiringan side arm (branch) dimulai dari posisi vertical keatas 90o, ,60o dan 30o dengan radius belokan 15 mm.Untuk mengamati pengaruh sudut kemiringan side arm terhadap pemisahan fase yang dihasilkan maka dibuatlah seksi uji T-junction dengan diameter pipa horisontal 36 mm, diameter side arm 26 mm (rasio diameter 0,7), bahan pipa adalah acrylic dengan variasi water cut 49% - 70%, kecepatan superfisial air 0,20 ~ 0,39 m/s, kecepatan superfisial kerosene 0,15 ~ 0,25 m/s pada tiga variasi hambatan downstream. Berdasarkan data hasil eksperimen dan visualisasi aliran pada seksi uji, hasil pemisahan fase terbaik dicapai pada sudut kemiringan branch 90o dengan tekanan downstream 107843,5 Pa, watercut 49% yang menghasilkan fraksi kerosene di branch Fk = 94,7% dan fraksi air di branch Fw = 3,4% dengan efisiensi pemisahan fase sebesar η = 95%. Kondisi terbaik diatas diperoleh pada Jw = 0,20 m/s, Jk = 0,22 m/s pada pola aliran Three Layer (3L-2).
FLUKTUASI BEDA TEKANAN DARI POLA ALIRAN SLUG AIR-UDARA PADA ALIRAN DUA FASE SEARAH PIPA HORIZONTAL Santoso, Budi; Indarto, Indarto; Deendarlianto, Deendarlianto; W., Thomas S.
ROTASI VOLUME 14, NOMOR 2, APRIL 2012
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (659.869 KB) | DOI: 10.14710/rotasi.14.2.1-6

Abstract

Karakteristik fluktuasi beda tekanan aliran slug dua fase udara-air diselidiki dalam pipa horisontal dengan panjang 10 m dan diameter dalam 24 mm. Tujuan penelitian ini adalah mengidentifikasi karakteristik dari fluktuasi beda tekanan pola aliran slug menggunakan analisis statistik, probability density function (pdf), autokorelasi dan power spectral density (psd). Sebuah sensor Differential Pressure Tansducer (DPT) dipasang untuk merekam fluktuasi beda tekanan aliran slug. Sinyal beda tekanan dikondisikan oleh pressure amplifier/signal conditioning dan diubah menjadi sinyal digital menggunakan peralatan Analog to Digital Converter (ADC). Karakteristik dari fluktuasi beda tekanan aliran slug sangat dipengaruhi oleh kecepatan superfisial fluida. Perubahan kecepatan superfisial udara dan kecepatan superfisial air dapat dibedakan dengan jelas menggunakan analisis statistik, PDF, autokorelasi dan PSD.
Mediating Role of Strategy in the Relationship between Organization Learning and Business Performance Savitri, Fania Mutiara; Indarto, Indarto
JURNAL STUDI MANAJEMEN ORGANISASI Vol 17, No 1 (2020)
Publisher : Faculty of Economics and Business Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (354.294 KB) | DOI: 10.14710/jsmo.v17i1.31205

Abstract

Business performance was always associated with small and medium scale businesses durability. Wedding Organizer (WO) Business was a seasonal business with poor durability characteristic due to wedding events fluctuation. WO business role was crucial both helping and organizing wedding event that is ussualy needed by the bride and groom in their wedding. This study aimed to analyze the impact of organizational learning on business performance and use collaboration and business diversification as mediating variable in Semarang Wedding Organizer. Research approach used quantitative research method. This research type is an explanatory research in explaining factors that affect business performance. This study took a sample 43 respondents who run Wedding Organizer business in Semarang City by convenience sampling method. Data was collected through a questionnaire with a Likert scale measurement with five measurement scales. Data analysis method uses 3-stage multiple regression using SPSS 20. The results of this study proved that organizational learning affects collaboration, organizational learning affects business performance; Organizational learning does not affect business diversification, collaboration affects business performance and diversification does not affect business performance. The mediation test also explained that collaboration was successful as a mediating variable on research conducted at Semarang Wedding Organizer. This result also give a new concept called collaboration-based project strategy.
Co-Authors A.J, Dyah Nirmala Achilleus Hermawan Astyanto Afisna, Lathifa Putri Akhmad Zidni Hudaya Alva Edy Tontowi Anggita Gigih Wahyu Iriawan, Anggita Gigih Wahyu Aprih Santoso Cahyadi, Puas Deendarlianto Dewi Puspitasari Dwi Budi Santoso Entin Hidayah Herry Pintardi Chandra I Putu Artama Wiguna IGNB. Catrawedarma Ismu Handoyo Khasani Khasani Kiswanta Kiswanta, Kiswanta Mahmuddin, M Medha, Akbar Yuga Adhikara Mulya Juarsa Nugroho, Fellando Martino Nurfalitasari, Iftika Okto Dinaryanto Peter F Kaming Purnomo Purnomo Purnomo, P Reksa Belagama, Hadrian Rufiani Nadzirah Samsul Kamal Savitri, Fania Mutiara SETYOWATI, N. Siti Zubaidah Sukamta Sukamta Sumarsono, Agus Sumarsono, Agus Thomas S. W. Tri Agung Rohmat Tri Agung Rokhmat, Tri Agung Wibawa Endra Juwana, Wibawa Endra Wiratni Wiratni, Wiratni Yundari, Yundari Yusuf Rahman