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All Journal Geo Media: Majalah Ilmiah dan Informasi Kegeografian Jurnal Ilmiah WUNY Tunas Geografi Swara Bhumi Pendidikan Geografi Rekayasa Mesin Jurnal Pengabdian Kepada Masyarakat Sakai Sambayan Turbo : Jurnal Program Studi Teknik Mesin Warta Perpustakaan Pusat Undip JURNAL EDUCATION AND DEVELOPMENT JURNAL PENDIDIKAN TAMBUSAI Jurnal Inovator JURNAL REFORMASI ADMINISTRASI Jurnal Ilmiah untuk Mewujudkan Masyarakat Madani GEOGRAPHY : Jurnal Kajian, Penelitian dan Pengembangan Pendidikan JURNAL GEOGRAFI Geografi dan Pengajarannya International Journal of Social Learning (IJSL) Jurnal Otoranpur ARMATUR : Artikel Teknik Mesin dan Manufaktur Improvement: Jurnal Manajemen dan Bisnis Indonesian Journal of Contemporary Multidisciplinary Research Geographica: Science and Education Journal GeoEco Geosfera Indonesia
EKO BUDIYANTO
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Other

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Uji ketahanan fatik aluminium hasil remelting piston bekas menggunakan metode pengecoran centrifugal casting Nugroho, Eko; Budiyanto, Eko; Kurniawan, Rubi; Sumosusilo, Joko
TURBO [Tulisan Riset Berbasis Online] Vol 8, No 2 (2019): Jurnal Turbo Desember 2019
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v8i2.1097

Abstract

Aluminum is one of the non-ferrous metals that are most widely used in the engineering field due to it has mild properties and is resistant to corrosion, but aluminum waste such as used pistons that are damaged or not utilized as an proper resource, on the other hand, that this process is very potential due to it uses a used piston that is not used, and is expected to have a better economic value by doing remelting and centrifugal casting to the used piston. This study aims to determine the value of the fatigue cycle of the used piston which is remelting and printed using the centrifugal casting method by using variations in the pouring temperature and die temperature and rotation variations. Based on the tests conducted using pouring temperature variations and rotation speed are as follows: best cycle value at 250 rpm variation is at pouring temperature 600oC with a value of 76000 N, and the lowest is at room temperature of 750oC with a value of 32000 N, best cycle at a variation of 500 rpm is at a pouring temperature of 700oC with a value of 40000 N, and the lowest is at a room temperature of 660oC with a value of 12000 N. The best cycle value at a variation of 750 rpm is at a pouring temperature of 750oC with a value of 16000 N, and the lowest is at room temperature 660oC with a value of 10000 N. While the results of subsequent tests conducted using variations in die temperature and rotation speed are as follows: the best cycle value at 250 rpm variation is at a print temperature of 350oC with a value of 17400 N, and the lowest is at room temperature of 250oC with a value of 8370 N. The best cycle value at a variation of 500 rpm is at a print temperature of 350oC with a value of 67760 N, and the lowest is at a room temperature of 250oC with a value of 22850 N. The best cycle value at a variation of 750 rpm is at a print temperature of 350oC with a value of 75170oC. and the lowest is at room temperature of 250oC with a value of 28940 N.Keywords: Centrifugal casting, fatigue test, remelting, used piston, aluminum, cycle value.Barbarslot adalah salah satu situs resmi slot deposit 5000, 5rb dan depo 5k terbaru dengan beragam permainan terbaik tahun 2025.
Dinamika Spasial Permasalahan Transportasi di Demak: Perspektif Geografi Transportasi dalam Menghadapi Tantangan Banjir Rob dan Infrastruktur yang Terdampak di Wilayah Kabupaten Demak Maarif, Muhammad Yusuf; Budiyanto, Eko
Jurnal Ilmiah WUNY Vol. 7 No. 2 (2025): Jurnal Ilmiah WUNY
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jwuny.v7i2.84708

Abstract

Indonesia has very diverse topographical and geographical conditions. This gives rise to the frequent occurrence of natural disasters in several regions. One of them is Demak Regency, which is included in the North Coast of Java area and is located in lowlands, basins, and close to river flows. Tidal flooding disasters often hit the area, and certainly the occurrence of these disasters will impact several aspects. One aspect that is affected is the disruption of transportation network access. This article discusses the impact of tidal flooding on infrastructure conditions, particularly related to transportation in Sayung, Bonang, and Karang Tengah Districts of Demak Regency. The method used in writing this article is descriptive qualitative. Source collection was conducted through literature study or library research through various previous studies that can be accessed on the internet. The results of the research are Spatial Dynamics of Tidal Flooding, Impact of Tidal Flooding on Infrastructure and Transportation, Challenges in Facing Transportation Problems, and Solutions in Overcoming Transportation Problems.
SENSITIVITAS MATA AIR KARST GOA GREMENG TERHADAP HUJAN DI AREA TANGKAPANNYA Budiyanto, Eko
JURNAL GEOGRAFI Geografi dan Pengajarannya Vol 17 No 1 (2019): JURNAL GEOGRAFI Geografi dan Pengajarannya
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jggp.v17n1.p63-70

Abstract

Abstrak : mata air merupakan satu bentuk sumberdaya air yang vital bagi masyarakat di wilayah karst. Bentang lahan karst yang rentan memerlukan pengelolaan lingkungan yang tepat untuk melindungi kelestarian mata air tersebut. Mata air karst Goa Gremeng adalah satu contoh mata air di lingkungan karst Gunungsewu yang perlu dikelola dan dilindungi. Air dari mata air ini dimanfaatkan oleh penduduk untuk beberapa keperluannya. Dalam rangka upaya perlindungan mata air karst Goa Gremeng, maka perlu dipahami karakteristik dari mata air ini terutama berkaitan dengan sensitivitasnya terhadap hujan. Tujuan dari penelitian ini adalah untuk mengetahui sensitivitas mata air Goa Gremeng terhadap hujan di area tangkapannya. Metode yang dilakukan adalah dengan pengukuran dan observasi terhadap fluktuasi parameter kualitas air dan dikorelasikan dengan pola curah hujan yang turun di area tangkapannya. Parameter yang diukur adalah pH, TDS, kekeruhan, temperature, DO, dan nitrat. Pengukuran dilakukan secara langsung di lapangan dan di laboratorium. Penelitian ini menunjukkan adalah fluktuasi beberapa parameter kualitas air yang memiliki korelasi sangat kuat dan kuat terhadap tebal hujan. Parameter TDS memiliki korelasi negative sangat kuat yaitu sebesar -0,85. Parameter kekeruhan memiliki korelasi positif yang kuat yaitu sebesar 0,76. Parameter nitrat dan temperature memiliki korelasi negative yang kuat yaitu masing-masing sebesar -0,73 dan -0,65. Korelasi tertinggi dari parameter-parameter tersebut terhadap tebal hujan terjadi pada hari yang sama dengan saat pengukuran parameter kualitas air. Temuan ini mengindikasikan bahwa mata air karst Goa Gremeng memiliki tingkat sensitivitas yang tinggi terhadap hujan di area tangkapannya.
KETERSEDIAAN RUANG TERBUKA HIJAU MENGGUNAKAN METODE NORMALIZED DIFFERENCE VEGETATION INDEX DI KABUPATEN GRESIK TAHUN 2021 Sari, Khofifah Maulida; Budiyanto, Eko; Muzayanah, Muzayanah; Kurniawati, Aida
JURNAL GEOGRAFI Geografi dan Pengajarannya Vol 19 No 1 (2021): JURNAL GEOGRAFI Geografi dan Pengajarannya
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jggp.v19n1.p49-62

Abstract

Pembangunan kawasan industri menarik banyak tenaga kerja baik dari dalam maupun luar Kabupaten Gresik dan membutuhkan lahan tempat dibangunnya fasilitas-fasilitas industri. Penambahan jumlah penduduk di Kabupaten Gresik juga berdampak pada meningkatnya kebutuhan lahan permukiman. Sejalan dengan pertumbuhan dan perubahan penggunaan lahan tersebut, keberadaan RTH harus tetap dijaga. Hal ini ditujukan untuk menjaga agar ekosistem suatu wilayah tetap seimbang. Penelitian ini berbasis interpretasi citra secara digital menggunakan software Quantum GIS 3.16.5 dengan metode Normalized Difference Vegetation  Index (NDVI). Penelitian ini dilakukan di seluruh wilayah Kabupaten Gresik. Penentuan klasifikasi jenis tutupan lahan dilakukan dengan menentukan nilai ambang batas maksimum dan minimum melalui uji threshold. Hasil penelitian ini menunjukkan bahwa terjadi penurunan luas RTH dalam rentang 5 tahun. Pada tahun 2021 luas RTH hanya sebesar 160,15 km² atau 13% dari keseluruhan luas wilayah Kabupaten Gresik. Untuk memenuhi ketetapan minimal proporsi RTH, Kabupaten Gresik membutuhkan penambahan luas sebesar 17% atau 202,93 km².
A DAILY CO2 CONCENTRATION IN NORTHERN SURABAYA CITY Magita, Nastiti Sigra Dewi; Muzayanah, Muzayanah; Budiyanto, Eko
JURNAL GEOGRAFI Geografi dan Pengajarannya Vol 20 No 2 (2022): JURNAL GEOGRAFI Geografi dan Pengajarannya
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jggp.v20n2.p89-96

Abstract

CO2 concentration is one air quality parameter set by WHO. High concentrations of carbon dioxide will have an impact on human health. CO2 is a gas that can cause a greenhouse effect in a city like Surabaya. This study aims to reveal the dynamics of CO2 concentration in northern Surabaya, which is a center of urban activity in Surabaya. This type of research is descriptive analytic with a quantitative approach. The population used is based on the division of administrative regions in Surabaya u tara section. Sampling is carried out in a purposive way, where each land use is taken five locations. Data collection techniques use measurement and observation. The data analysis technique used is descriptive. The results of the data analysis showed that there was a difference in the average CO2 concentration in the morning and evening. All research sites have CO2 concentrations above the safe threshold of CO2 concentrations set by WHO. There is an increase in CO2 concentrations in the morning and evening variably. The average CO2 concentration in the morning was recorded at 436.05 ppm and increased at night to 518 ppm. The highest CO2 concentration in the morning occurred on Colombo road at 467 ppm and the lowest at 345 ppm on Bangunsari road. The highest average CO2 concentration at night occurred on Morokrembangan road, which was 558 ppm and the lowest on Bangunsari road was 460 ppm. Keywords: CO2 concentration, air pollution, northern Surabaya
Pemetaan Daerah Rawan Banjir di Kecamatan Kwadungan Kabupaten Ngawi Burhany, Alven Ahmad; Budiyanto, Eko
Jurnal Pendidikan Tambusai Vol. 8 No. 2 (2024)
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Kecamatan Kwadungan merupakan kecamatan di Kabupaten Ngawi yang sering terjadi banjir. Bencana banjir tersebut sering terjadi dikarenakan intensitas curah hujan yang tinggi serta luapan air Sungai Madiun yang berdampak pada jalan lokal kecamatan, permukiman, persawahan serta fasilitas umum. Penelitian ini bertujuan untuk mengetahui sebaran daerah rawan dan zonasi daerah bencana banjir. Penelitian menggunakan pendekatan deskriptif kuantitatif. Pengambilan sampel dengan metode non probability sampling menggunakan purposive sampling. Data dikumpulkan melalui observasi dan dokumentasi. Teknik pengolahan dan analisis data menggunakan teknik skoring, pembobotan dan overlay. Hasil dari penyebab banjir di Kecamatan Kwadungan memiliki nilai penentu paling besar adalah curah hujan dan ketinggian permukaan. Penelitian ini menunjukkan bahwa tingkat kerawanan banjir di Kecamatan Kwadungan memiliki indeks persentase sebesar 55,89% pada kelas Sangat Rawan dengan luas 1.794,24 Ha, kemudian indeks persentase sebesar 43,92% pada kelas Cukup Rawan dengan luas 1.410,99 Ha dan indeks persentase sebesar 0,19% pada kelas Tidak Rawan dengan luas 6,1 Ha.
Pengaruh waktu anodizing dan jarak anoda-katoda terhadap nilai laju korosi Aluminium 6061-T6 Eko Budiyanto; Yususf Rizal fauzi
Jurnal INOVATOR Vol. 2 No. 1 (2019): Jurnal INOVATOR
Publisher : LPPM Politeknik Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (571.753 KB) | DOI: 10.37338/inovator.v2i1.110

Abstract

This research was conducted to identify how influential the duration and anode-cathode distance to the corrotion rate produced in the anodizing process so that it can be used to consider the effectiveness of an anodizing process. This research has been used regular anodizing techniques commonly used for decorative purposes. The method has been used is to vary the anodizing duration (2, 4, and 6 minutes) and anode-cathode distance ( 18, 20, and 22 cm) and apllied the weight loss method to calculated corrotion rate value. The result is that the highest corrotion rate is obtained at 4 minutes anodizing duration and 18 cm anode-cathode distance by 663,7 mm/year, while the lowest corrotion rate is found in 3 exsperiments, at 2 minutes anodizing duration for 20 cm and 22 cm anode-cathode distance, and at 4 minutes anodizing duration for 22 cm anode-cathode distance by 442,5 mm/year.
Development of Virtual Geography Laboratory to Improve Cognitive Learning Outcomes and Spatial Capabilities Social Sciences Education Prasetya, Sukma Perdana; Prasetyo, Ketut; Budiyanto, Eko; Rindawati, Rindawati; Murtini, Sri; Fadirubun, Fahmi Fahrudin; Dock, Chanthoeurn
International Journal of Social Learning (IJSL) Vol. 4 No. 3 (2024): August
Publisher : Indonesian Journal Publisher in cooperation with Indonesian Social Studies Association (APRIPSI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47134/ijsl.v4i3.285

Abstract

This project aims to develop a website that functions as a virtual laboratory for studying geography topics that is suitable for use, as well as testing its effectiveness on cognitive learning outcomes and spatial abilities. The research uses the Borg and Gall development model, which is then summarized and divided into three main activities: introduction, development, and testing. Subject selection was based on the cluster random sampling technique. The subjects consisted of Class Learning outcome data was collected using questionnaires, interviews, pretests and posttest, analyzed using descriptive statistical tests and Mancova inferential statistics. Research Results: 1) the development of a geographic virtual laboratory is suitable for use according to material experts and received the "very good" category, while according to media experts it received the "good" category; 2) students gave a strong response to the implementation of the virtual geography laboratory; 3) there is a significant difference between initial abilities and cognitive learning outcomes and spatial abilities; and 4) there are no significant differences between two schools that implement virtual geography laboratories with cognitive learning outcomes and spatial abilities.
Pengaruh Kualitas Pelayanan, Citra Perusahaan, dan Promosi Media Sosial Terhadap Keputusan Pembelian Pada Usaha Katering Sulistyowati, Eny; Novianti, Rini; Rumpoko HS, Hendro; Budiyanto, Eko
Improvement: Jurnal Manajemen dan Bisnis Vol 4 No 2 (2024): Vol 4 No 2 September 2024
Publisher : UMSurabaya Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/imp.v4i2.24573

Abstract

In an increasingly competitive digital era, it is important for catering businesses to understand the factors that influence consumer behavior. This study aims to analyze the effect of service quality, corporate image and social media promotion on consumer purchasing decisions in the context of the Citra Rasa catering business. The research method used is a survey with a questionnaire instrument distributed to consumers who have made purchases at the Citra catering business, as many as 53 consumers and potential consumers have filled out the questionnaire. The incoming data were analyzed using SEMPls. The results showed that service quality, corporate image, and social media promotion did not have a significant effect on consumer purchasing decisions. The low R-Square value (0.019) and the negative Adjusted R-Square (-0.041) indicate that the independent variables only explain a small part of the variation in purchasing decisions. This finding indicates that other factors, such as price and menu variety, may be more relevant in influencing purchasing decisions. Keywords: Service Quality, Corporate Image, Social Media Promotion, Purchasing Decision, Catering Business Dalam era digital yang semakin kompetitif, penting bagi usaha katering untuk memahami faktor-faktor yang mempengaruhi perilaku konsumen. Penelitian ini bertujuan untuk menganalisis pengaruh kualitas pelayanan, citra perusahaan dan promosi media sosial terhadap keputusan pembelian konsumen dalam konteks usaha katering Citra Rasa. Metode penelitian yang digunakan adalah survei dengan instrumen kuesioner yang disebarkan kepada konsumen yang telah melakukan pembelian di usaha katering Citra, sebanyak 53 orang konsumen dan calon konsumen telah mengisi kuesioner. Data yang masuk dianalisis dengan menggunakan SEMPls. Hasil penelitian menunjukkan bahwa kualitas pelayanan, citra perusahaan, dan promosi media sosial tidak berpengaruh signifikan terhadap keputusan pembelian konsumen. Nilai R-Square yang rendah (0.019) dan R-Square Adjusted yang negatif (-0.041) mengindikasikan bahwa variabel-variabel independen hanya menjelaskan sebagian kecil dari variasi keputusan pembelian. Temuan ini mengindikasikan adanya faktor lain, seperti harga dan variasi menu, yang mungkin lebih relevan dalam mempengaruhi keputusan pembelian. Kata Kunci: Kualitas Jasa, Citra Perusahaan, Promosi Media Sosial, Keputusan Pembelian, Bisnis Katering
Hardening Baja AISI 1045 Menggunakan Gel Aloe Vera Sebagai Media Pendingin Budiyanto, Eko; Choiron, Moch. Agus; Darmadi, Djarot B.
Jurnal Rekayasa Mesin Vol. 7 No. 2 (2016)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2016.007.02.3

Abstract

Quenching is a cooling method of heat treatment for metal hardening. Quenching refers to the process of rapidly cooling metal parts from the austenitizing or solution treating temperature, typically from within the range of 815 to 970 °C for steel. The selection of a quenchant medium depends on the hardenability of the particular alloy, the section thickness and shape involved, and the cooling rates to achieve the desired microstructure. The liquid quenchants of oil is commonly used in industrial manufacture. But, oil is not environmental. The aim of this research research is to find new quenchant for change oil as quenchant to more environmental. Gel aloe vera is purposed for it. The material used in this study is AISI 1045 steel. Cooling curve and cooling rate is measured by finite element model, ANSYS APDL 14.5. True experimental is done to view microstructure and measure hardness of steel. Simulation result shown that gel aloe vera has almost similar cooling curve and cooling rate with oil. Microstructure result of steel for gel aloe vera as quenchant is martensite in surface, bainite in center, and pearlite in between surface and center. Hardness number of steel for gel aloe vera as quenchant is 189.63 HVN in surface, 182.566 HVN in center, and 162.866 HVN in between surface and center. By simulation and true experimental analisys concluded that gel aloe vera has opportunities to change oil as quenchant for hardening process.
Co-Authors Achmad Masruri Agus Setiawan AGUSTINA MS, RETNO Aida Kurniawati Aida Kurniawati Aida Kurniawati Aida Kurniawati Aida Kurniawati Aida Kurniawati ALDONAVY PRABUDIMAS, CINDY Ali Imron, Akhmad Andreas Luki Indratmoko APRILIANA, TRIAS Ardhyan Dwi Nurcahyo Ardiyanto Darmanto Asroni Asroni Asroni, Asroni Bahfie, Fathan Bambang Hariyanto Bayu Aji Kuncoro Burhany, Alven Ahmad Deva Agus Setiawan Dimas Anggoro Dimas Hendra Sasmita Djarot B. Darmadi, Djarot B. Dock, Chanthoeurn Ebid Rocky Alfatikh Eduwar, Nurul Eko Nugroho Eko Nugroho Elizabeth Titiek Winanti ENY SULISTYOWATI Fadirubun, Fahmi Fahrudin Fattah, Ariesta Nuur Gde Brahupadhya Subiksa HARIYANTO, SETIYAWAN Harnowo Supriadi Juli Murtini Kemas Ridhuan Ketut Prasetyo Kurniawan, Rubi KUSUMA WARDANI, GANDHI Lalu Saefullah Larasati, Amira Lukito Dwi Yuono, Lukito Dwi Lutfi Ailuul Waahidati Maarif, Muhammad Yusuf Magita, Nastiti Sigra Dewi Moch. Agus Choiron Muhamad Danial, Fikri Muzayanah Muzayanah Muzayanah Muzayanah Muzayanah Muzayanah Muzayanah Muzayanah Muzayanah Muzayanah Muzayanah Muzayanah Nastiti Sigra Dewi Maginta NUGROHO HARI PURNOMO Nugroho Hari Purnomo Nugroho Hari Purnomo Nugroho Hari Purnomo Nugroho Hari Purnomo Nugroho Hari Purnomo Nugroho Hari Purnomo Nurcahyo, Ardhyan Dwi Pamuji, Wirawan Permatasari, Ivana Pertiwi, Sri Endah Pramono, Atik PUJI LESTARI, EKA Rindawati, Rindawati Rini Novianti Rudiyanto Rudiyanto, Rudiyanto Rumpoko HS, Hendro Sari, Khofifah Maulida sri murtini . Sukma Perdana Prasetya Sulis Dri Handono Sulis Drihandono Sulistiyo, Danang Sumosusilo, Joko SYAHADAH NOVITA SARI, ARINI Untung Surya Dharma, Untung Surya Wahyono Wahyono Wahyudi, Tri Cahyo Wahyudin, Dian Wiwik Sri Utami Yususf Rizal fauzi