Jurnal Qua Teknika https://ejournal.unisbablitar.ac.id/index.php/qua <div class="row"> <div class="col-sm-6 col-md-12"> <div class="img-responsive">Memuat artikel hasil penelitian dan kajian kritis bidang ilmu-ilmu teknik, terapan, rekayasa, teknik elektro, terknik sipil dan aplikasinya.</div> </div> </div> <p>&nbsp;</p> <p>&nbsp;</p> <p>&nbsp;</p> <p>&nbsp;</p> en-US <div class="page"> <div class="page"> <p>Authors who publish with this journal agree to the following terms:</p> <ol> <li>Copyright on any article is retained by the author(s).</li> <li>Author grant the journal, right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work’s authorship and initial publication in this journal.</li> <li>Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal’s published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.</li> <li>Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work.</li> <li>The article and any associated published material is distributed under the&nbsp;<a href="http://creativecommons.org/licenses/by-sa/4.0/" rel="license">Creative Commons Attribution-ShareAlike 4.0 International License</a></li> </ol> </div> </div> quateknika@unisbablitar.ac.id (Editor jurnal QUATEKNIKA) quateknika@unisbablitar.ac.id (Journal Administrator) Sat, 20 Mar 2021 00:17:28 +0000 OJS http://blogs.law.harvard.edu/tech/rss 60 PERBAIKAN NILAI KUAT TEKAN BIOKERAMIK SCAFFOLD HIDROKSIAPATIT MENGGUNAKAN TREATMENT PLASMA DBD https://ejournal.unisbablitar.ac.id/index.php/qua/article/view/1402 <p><em>On type of Plasma is a Plasma DBD which is generated at atmospheric pressure. Scaffold hydroxyapatite (HA) is a bioceramic which widely developed nowadays in applications. The pores that are owned in the scaffold can effect a mechanical properties, namely compressive strength. Treatment by using Plasma DBD method is expected to have a good improvement to interconnected porous so as to improve the compressive strength of the bioceramic&nbsp; scaffold HA. In this study, we use 3 different time variations are 20 minutes, 25 minutes dan 30 minutes in Plasma DBD treatment to determine the effect of each variations. Pore analysis and compressive strength test will be carried out before and after Plasma DBD treatment. The surface morphology of the scaffold HA was observed by using a Field Emission – Scanning Electron Microscope (FE-SEM), composition by using EDX and compressive strength was observed by using compressive strength test. The result showed that the compressive strength of bioceramic scaffold HA increase relatively to increase of the treatment time.&nbsp; </em></p> Dica A. Nurmanta, Masruroh Masruroh, D.J. Djoko H. Santjojo Copyright (c) 2021 Jurnal Qua Teknika https://creativecommons.org/licenses/by-sa/4.0 https://ejournal.unisbablitar.ac.id/index.php/qua/article/view/1402 Wed, 10 Mar 2021 12:54:18 +0000 PENGARUH PENAMBAHAN LIMBAH BAN BEKAS TERHADAP KEKUATAN BETON https://ejournal.unisbablitar.ac.id/index.php/qua/article/view/1405 <p><em>In the world of construction, concrete still plays an important role as the main material used. This is because concrete has several advantages such as ease of work, the use of solid waste as material substitution in the industry is not new. However, the use of solid waste as a substitute for aggregates in concrete has been increasing in recent years, as a promising solution to reduce inorganic solid waste. From the tests carried out in the university tribhuwana to laboratories, it shows that for compressive strength and tensile strength, it decreases. The concrete compressive strength test results with added material in the form of tire chips and in the testing of compressive strength for 5% used tire waste burned 13.22 MPa, as well as 10%, the value burned 9.74 MPa, and for compressive strength test 15% of the value decreases for compressive strength with a mixture of burnt tire chips 4.77Mpa. The graph of the concrete tensile strength test with added material is in the form of tire chips and in testing the tensile strength for used tire waste 5% with for concrete that is not burned 1.844Mpa value. Likewise with 10% for unburned concrete the value of 2,020Mpa with a mixture of used tire waste as added material. And for the tensile strength test 15% the value decreases for non-burned concrete with a quality of 1.544Mpa.</em></p> Handika Setya Wijaya, Evangelino Da Cruz Evangelino Copyright (c) 2021 Jurnal Qua Teknika https://creativecommons.org/licenses/by-sa/4.0 https://ejournal.unisbablitar.ac.id/index.php/qua/article/view/1405 Wed, 10 Mar 2021 13:15:49 +0000 RANCANG BANGUN SISTEM INFORMASI PENJUALAN MENGGUNAKAN METODE WATERFALL https://ejournal.unisbablitar.ac.id/index.php/qua/article/view/1407 <p><em>Abstract - esign and Design of Computer Sales Information Systems using the waterfall method is a study that aims to design and build sales information systems at a computer retail store or "Artha Komputer Center". Artha Computer Center is one of the retails or stores in Pacitan that provides various types of computers and laptops. In the management of sales that are still conventional in nature, this research focuses more on the design and implementation of systems that hope to provide alternative solutions in the management of goods. So with this sales information system, it is expected that the management of goods is more organized, sales transactions are safer from mistakes. This waterfall method uses a sequential approach by following several phases, including system requirements analysis, system design, coding on the system, testing and the last one is maintenance.</em><em>.</em></p> Candra Budi Susila Candra Budi Susila, Miftahul Huda Huda Copyright (c) 2021 Jurnal Qua Teknika https://creativecommons.org/licenses/by-sa/4.0 https://ejournal.unisbablitar.ac.id/index.php/qua/article/view/1407 Wed, 10 Mar 2021 00:00:00 +0000 EVALUASI STABILITAS DINDING PENAHAN TANAH PADA SUNGAI NAMBAAN KECAMATAN NGANTANG KABUPATEN MALANG https://ejournal.unisbablitar.ac.id/index.php/qua/article/view/1433 <p>Bangunan yang didesain untuk menahan tekanan lateral (horizontal) tanah disebut bangunan dinding penahan tanah. Biasanya bangunan dinding penahan dibuat ketika terjadi perubahan dalam elevasi tanah yang melampaui sudut <em>at-rest</em> dalam tanah. Tekanan tanah lateral di belakang dinding penahan tanah tergantung kepada sudut geser dalam tanah (</p> Suhudi Suhudi, Vinsensia Elviana Apli Copyright (c) 2021 Jurnal Qua Teknika https://creativecommons.org/licenses/by-sa/4.0 https://ejournal.unisbablitar.ac.id/index.php/qua/article/view/1433 Thu, 18 Mar 2021 08:01:33 +0000 ANALISIS DESAIN EMBUNG SEBAGAI PENGATUR SUPLAI AIR IRIGASI DENGAN MENGGUNAKAN METODE WATER BALANCE (STUDI KASUS: EMBUNG KOLAK DESA TEMPUREJO KECAMATAN WATES KABUPATEN KEDIRI) https://ejournal.unisbablitar.ac.id/index.php/qua/article/view/1436 <p><em>Embung compote is a water structure that functions to distribute and ensure the availability of water supply for crops or livestock in the dry and rainy season. Located in Tempurejo Village, Wates District, Kediri Regency. Embung is a micro-sized water reservoir (reservoir) around agricultural land that is built to accommodate the amount of rainwater during the rainy season and become a supply in the dry season. The current condition in the reservoir source compote is experiencing a problem of decreasing water resources and part of the reservoir building is leaking.</em></p> <p><em>The initial step of this research is hydrological analysis to determine monthly rainfall, effective rainfall R80, effective rainfall 10 days. The results of the analysis are then used to calculate water requirements using the Water Balance method and design planning of the compote reservoir. Water Balance / Water Balance is a comparison between the available water debit and the water required for irrigation purposes.</em></p> <p><em>Based on the results of the analysis and design planning of the embung, the dimensions of the embung are 2.3 m high, round lighthouse type, 1 flushing door with a size (2.14 mx 1 m), a volume of water reservoir is 1.086.84 m3, foundation depth is 0.8 m , the volume of the foundation is 0.217 m3 which can withstand a load of 3.255 tons.</em></p> Vanesa Indriani, nurjanah nurjanah Copyright (c) 2021 Jurnal Qua Teknika https://creativecommons.org/licenses/by-sa/4.0 https://ejournal.unisbablitar.ac.id/index.php/qua/article/view/1436 Sat, 20 Mar 2021 00:00:00 +0000 PENGARUH KONDISI PENCAHAYAAN TERHADAP HASIL SURVEI KECEPATAN KENDARAAN DENGAN PORTABLE SPEED GUN DAN APLIKASI BERBASIS ANDROID https://ejournal.unisbablitar.ac.id/index.php/qua/article/view/1451 <p><em>&nbsp;</em><em>Technological advances developed rapidly with the use of the Android system in 2007. Android is an operating system or mobile-based operating system that is very widely used today. Mainly on smart phones (smartphones) or tablets. In addition, Android has a large community of application developers that extend the functionality of the device, generally written in a customized version of the programming language. One of the applications based on android is the "Speed ​​Gun" application. This application functions to measure the speed of an object moving by touch such as a velocimeter.</em></p> <p><em>The expected objective of the results of this study is to determine the results and the difference between the vehicle speed survey method using a portable speed gun and Android-based applications in each period.</em></p> <p><em>And the effect of lighting between the morning and evening periods on portable speed gun equipment and Android-based applications for vehicle speed surveys.The results of the speed survey using the speedgun android application equipment show that the speed data is close to the manual method, the difference in speed using the portable speedgun equipment for the afternoon period has an average difference of 9.2 km / hour which is the biggest difference compared to the speed difference between the speedgun android application equipment. and the manual method and the use of equipment for lighting conditions, shows that the portable speedgun equipment is highly influenced by lighting conditions, where from the analysis of the morning period, the average difference is 2.3 km / hour and the average difference is 9.2 km / evening.</em></p> Udi Subagyo Udi Subagyo, Achendri .Kurniawan Copyright (c) 2021 Jurnal Qua Teknika https://creativecommons.org/licenses/by-sa/4.0 https://ejournal.unisbablitar.ac.id/index.php/qua/article/view/1451 Tue, 30 Mar 2021 00:00:00 +0000 SUMBERDAYA, CADANGAN, PRODUKSI MINERAL DAN BATUAN PROVINSI JAWA TIMUR TAHUN 2018 https://ejournal.unisbablitar.ac.id/index.php/qua/article/view/1452 <p><em>Indonesia memiliki sumber daya alam yang melimpah salah satuya sumberdaya mineral yang dapat &nbsp;dimanfaatkan oleh negara untuk kepentingan &nbsp;masyarakat. Pulau jawa bagian timur yang diwakili oleh Provinsi Jawa Timur mempunyai potensi komoditas mineral sejumlah tiga puluh satu mineral. Potensi &nbsp;sumberdaya mineral suatu daerah dapat dihitung dengan menggunakan neraca sumberdaya &nbsp;mineral. Pengklasifikasian sumberdaya mineral adalah menjadi empat sumberdaya &nbsp;hipotetik, sumberdaya &nbsp;tereka, sumberdaya &nbsp;terindikasi, dan sumberdaya &nbsp;terukur. Acuan yang digunakan untuk menghitung neraca sumberdaya mineral suatu daerah adalah &nbsp;SNI 6728.4:2015. Cadangan diklasifikasikan menjadi dua yaitu cadangan terbukti dan cadangan terkira. Sumberdaya mineral paling besar di Jawa Timur &nbsp;adalah batu gamping sebesar 4.360.675.461 ton. Cadangan terbesar adalah komoditas Batu Gamping sebesar 2.567.292.867 ton dengan cadangan terkira sebesar 1.794.000.000 ton dan terbukti 773.292.867 ton. Tiga besar komoditas yang paling produktif adalah Sirtu, Andesit dan Batu Gamping. Sisa cadangan tebesar di tahun 2019 sebesar 2.566.060.071 komoditas Batu Gamping. Potensi beberapa komoditas sumberdaya mineral di Provinsi Jawa Timur pada tahun 2018 sangat besar sehingga diperlukan pengelolaan yang bijaksana. Sisa cadangan yang besar beberapa komoditas dapat dimanfaatkan untuk kesejahteraan masyarakat. Komoditas yang sudah dimanfaatkan oleh masyarakat merupakan komoditas yang digunakan untuk pembangunan infrastruktur di berbagai daerah. Pengelolaan potensi sumberdaya mineral dapat memberikan keuntungan bagi daerah dan masyarakat berupa pajak mineral dan batuan yang wajib dibayarkan oleh perusahaan</em></p> Gregorius Aryoko Gautama1, Dandung Novianto, Agus Suhardono Copyright (c) 2021 Jurnal Qua Teknika https://creativecommons.org/licenses/by-sa/4.0 https://ejournal.unisbablitar.ac.id/index.php/qua/article/view/1452 Tue, 30 Mar 2021 11:42:21 +0000