ENSAINS JOURNAL最新文献

{"title":"ANALYSIS OF IMPROVEMENT CAUSING DAMAGE TO CYLINDER LINERS AND PISTON RODS IN VEHICLE MODELS (F65 # -3SZ)","authors":"Cecep Deni Mulyadi","doi":"10.31848/ENSAINS.V2I2.241","DOIUrl":"https://doi.org/10.31848/ENSAINS.V2I2.241","url":null,"abstract":"Abstract: Cases that occur complaining about the engine on the vehicle is abnormal, both in idling and high rpm, when the initial inspection is carried out, there appear to be abnormal symptoms on the vehicle's engine.So it needs repairs to the vehicle where there is a problem in the vehicle, which complains about the abnormal state of the engine both the state of idling or middle and high rpm.After doing repairs, the problems that occur occur. The water hammer is caused by a cowl top seal that has no locking clip and water filter assembly. As a result of the water hammer being produced, there is damage to the components inside the cylinder block, namely the cylinder liner and piston rod.Keywords: Abnormal, When Idling, High Rpm","PeriodicalId":297097,"journal":{"name":"ENSAINS JOURNAL","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133046138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SISTEM PENDUKUNG KEPUTUSAN DALAM KONSULTASI MEMBER UNTUK PENCAPAIAN MENJADI LEADER PADA SUATU PERUSAHAAN SWASTA NASIONAL","authors":"S. Suhanda","doi":"10.31848/ENSAINS.V2I2.237","DOIUrl":"https://doi.org/10.31848/ENSAINS.V2I2.237","url":null,"abstract":"Abstract: This journal describes the Development of a Consultation Member to achieve becoming a Leader in a National Private Company, which is a Case Study that needs to be addressed. Available Websites can be used for all members and leaders to update every day all activities, products, network development, and company activities as well as member bonus payments. The shortcomings of the system owned by the company is that there is no facility in making decisions for members to become a leader at PT. Melia Sejahtera which is a private company. This facility is needed, because many members do not understand and do not understand how to make decisions in running their business at PT. Melia Sehat Sejahtera. So from the description above in this Journal, there needs to be an explanation to be used as a rest and explanation For the person invol vedinit.To support the members in improving their achievements,become a leader (leader), it is necessary to have a support facility for decision on the website, namely in the form of a decision support system (SPK). SPK is a method that can be done for decision making in assessing, choosing and making a decision for a decision making Decision Support System or Decision Support System (SPK), generally defined as a system that is able to provide both the ability of problem solving ability and communication ability to semi-structured problem. Specifically. SPK is defined as a system that supports the work of a manager in solving semi-structured problems by providing information or proposal stoward scertain decisions.For the alternative to get the maximum decision alternatives, the members will choose the conditions according to the actual situation, so they will get an alternative decision for the members to reach and become leaders. Besides that it can spur work morale that is supported by the ability, and a satisfying work position for the Employees, soas to achieve the optimal target. Keywords: Decision Support Systems (SPK), Problems, Members, Leaders. Abstrak: Jurnal ini menjelaskan tentang Pengembangan Konsultasi Member untuk mencapai menjadi Leader di Perusahaan Swasta Nasional, yang merupakan Studi Kasus yang perlu ditangani. WebSite yang sudah tersedia dapat dipergunakan bagi seluruh member dan leader-nya dalam meng-update setiap hari seluruh aktivitas, produk, pengembangan jaringan, dan kegiatan-kegiatan perusahaan serta pembayaran bonus member. Adapun kekurangan dari Sistem yang dipakai oleh perusahaan adalah belum adanya fasilitas dalam pengambilan keputusan untuk member menjadi seorang leader di PT. Melia Sejahtera yang merupakan suatu Perusahaan swasta. Fasilitas ini diperlukan, karena banyak member yang kurang mengerti serta kurang paham bagaimana mengambil keputusan dalam menjalankan bisnisnya pada PT.Melia Sejahtera tersebut. Maka dari uraian diatas dalam Jurnal ini perlu adanya penjelasan untuk dijadikan sandaran dan penjelasan bagi orang yang terlibat si dalamnya. Untuk menunjang member dalam me","PeriodicalId":297097,"journal":{"name":"ENSAINS JOURNAL","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123943413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"STUDY DETAIL ENGINEERING DESIGN ( DED ) BANGUNAN GEDUNG HOTEL SHEO DI BANDUNG","authors":"D. Kusmana","doi":"10.31848/ENSAINS.V2I2.244","DOIUrl":"https://doi.org/10.31848/ENSAINS.V2I2.244","url":null,"abstract":"Abstract: Study Author's Engineering Detail Design at PT. Buff Buana Kriyasa. PT.ini has tested the Hotel Sheo Building on Monday-Saturday 11 to March 16, 2019 which was witnessed by Hotel Technicians. With the aim of planning, testing, and measuring the feasibility of hotels in the city of Bandung. For example, the author planned this one of them at the Sheo Hotel, including the Condition of Buildings, Rooms, Guest Rooms, BaseCame, Hotel Pages, Regions and Land strength. So that the establishment of hotels can be relied upon, and become an attraction for guests who come to the Hotel. So that hotels in the city of Bandung become an inn, a meeting event, which can satisfy the visitors. Besides that it is a hotel that is included as a favorite, with its territory in a strategic area, and has the strength of a sturdy and attractive building. So there is no need to worry. Therefore, the author will describe the Hotel planning problem by conducting tests including taking Profometer, Hammer Test, and Ultrasonic Pulse Velocity. Herewith, the author will describe the results of the tests that present the objectives, the results of field testing. So that interested parties and contributors are satisfied and helpful about the planning. For the smooth running of this work and also the opportunity given, the author is very useful to support the path of planning the Hotel Building in Bandung Keywords: Detail Engineering, Hotel Sheo, Ultrasonic Pulse Velocity. Abstrak: Study Detail Engineering Desaign Penulis lakukan di PT.Sangga Buana Kriyasa. PT.ini  telah  melakukan pengujian Gedung Hotel Sheo pada hari Senin-Sabtu 11 s/d 16 Maret 2019 yang disaksikan oleh Teknisi Hotel. Dengan tujuan untuk merecanakan, mengetes, dan mengukur kelayakan dari Hotel yang ada di Kota Bandung. Sebagai contoh Penulis melakukan perencanaan ini salah satunya pada Hotel Sheo, meliputi Kondisi Bangunan, Ruangan, Kamar Tamu, BaseCame, Halaman Hotel, Wilayah dan kekuatan Tanah. Supaya pendirian Hotel dapat diandalkan, dan menjadi daya tarik untuk para Tamu yang datang ke Hotel tersebut. Sehingga Hotel di Kota Bandung menjadi sebuah penginapan, acara pertemuan, yang dapat memuaskan para pengunjungnya. Disamping itu merupakan Hotel yang termasuk favorit, dengan wilayahnya ada di wilayah Strategis, serta mempunyai kekuatan Bangunan Gedung yang Kokoh dan menarik. Sehingga tidak perlu dikhawatirkan Maka dari itu Penulis akan menguraikan tentang masalah perencanaan Hotel tersebut dengan melakukan Pengujian meliputi pengambilan Profometer, Hammer Test, dan Ultrasonic Pulse Velocity. Bersama ini Penulis akan menguraikan hasil pengujian tersebut yang menyajikan tujuan, hasil pengujian lapangan. Sehingga pihak yang berkepentingan dan berkontribusi merasa puas dan membantu tentang perencanaan tersebut.untuk kelancaran pekerjaan ini dan juga kesempatan yang diberikan, kepada Penulis sangat bermanfaat untuk mendukukung jalannya perencanaan Bangunan Gedung Hotel yang ada di Kota Bandung. Kata Kunci ","PeriodicalId":297097,"journal":{"name":"ENSAINS JOURNAL","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113966156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ANALISA DAN PERANCANGAN MECHANICAL BAR SCREEN PADA INSTALASI PENGOLAHAN AIR MINUM (Analysis and Design of Mechanical Bar Screen in Drinking Water Treatment Plants)","authors":"Wisnu Wijaya","doi":"10.31848/ENSAINS.V2I2.243","DOIUrl":"https://doi.org/10.31848/ENSAINS.V2I2.243","url":null,"abstract":"Abstract: Installation to process raw water into consumable water consists of processing units that have their respective functions. The selection of these units is based on parameters that must be set aside in accordance with the results of water quality checks. The final result of processing must meet the standards set by the government. In addition to technical aspects, which must be considered also in the determination of the unit on the installation of drinking woter is an economic aspect and the availability of human resources.One of the components contained in the installation of drinking water is a mechanical bar screen. Cleaning of garbage on the bar screen is mechanically intended for cleaning to take place effectively and is not limited by time or weather conditions around the drinking water installation. From the design results obtained motor power required 1226.936 watts while the tensile stress of the flexrake results from the design calculation of . in this design also used material stailess stell AISI 304.Keywords: Designing, Mechanical Bar Screen,Abstrak: Instalasi untuk mengolah air baku menjadi air yang dapat dikonsumsi terdiri dari unit-unit pengolahan yang memiliki fungsi masing-masing. Pemilihan unit-unit ini didasarkan pada parameter-parameter yang harus disisihkan sesuai dengan hasil pemeriksaan kualitas air. Hasil akhir dari pengolahan harus memenuhi bakumutu yang ditetapkan oleh pemerintah. Selain dari segi teknis, yang harus diperhatikan juga dalam penentuan unit pada instalasi air minum adalah segi ekonomis dan ketersediaan sumber daya manusia.Salah satu komponen yang terdapat pada instalasi air minum adalah mechanical bar screen.  Pembersihan sampah pada bar screen secara mekanik dimaksudkan agar pembersihan dapat berlangsung secara efektif dan tidak dibatasi oleh waktu maupun kondisi cuaca di sekitar instalasi air minum. Dari hasil perancangan didapatkan daya motor yang dibutuhkan 1226.936 watt sedangkan tegangan tarik dari pada flexrake hasil dari perhitungan perancangan sebesar  . pada perancangan ini juga digunakan material stailess stell AISI 304.Kata Kunci : Perancangan, Mechanical Bar Screen,","PeriodicalId":297097,"journal":{"name":"ENSAINS JOURNAL","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117066806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"COMMUNICATION STRATEGY FOR TAX AMNESTY SOCIALIZATION","authors":"Dannisa Maulita Lestari, I. N. Pamungkas","doi":"10.31848/ENSAINS.V2I2.227","DOIUrl":"https://doi.org/10.31848/ENSAINS.V2I2.227","url":null,"abstract":"Abstract: The Tax Amnesty Program in Indonesia has been successfully implemented by the Directorate General of Taxes. With the communication strategy made by the Directorate General of Taxation P2Humas Directorate of Taxes, the tax amnesty program was awarded the world level organized by the International Public Relations Association (IPRA), the Golden World Award for Excellent in Public Relations 2018 in the Public Sector. IPRA considered that this tax amnesty program has bern achieved and remarkable achievements from the time which took place in mid-2016 to 2017. The purpose of this study is to know rhat communication strategie s such as what was done by the P2Humas Directorate in disseminating the Tax Amnesty program. This research use qualitative methods with qualitative descriptive research and constructivist paradigms. Based on the results of this study, it was found that the communication strategy carried out by the P2Humas Directorate in disseminating the Tax Amnesty program was to use all communication media, establish cooperative relations and conduct face-to-face socialization. Keywords: communication strategy, Public Relations, Amnesty Tax","PeriodicalId":297097,"journal":{"name":"ENSAINS JOURNAL","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124947100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"FUNGSI LINGKUNGAN TERBANGUN DI KAWASAN CIBADUYUT SEBAGAI KAWASAN EKONOMI KREATIF SENTRA SEPATU DI KOTA BANDUNG","authors":"Sufrin Sarman, Karto Wijaya, Rahy R. Soekardi, Raksa Maulana Subki","doi":"10.31848/ENSAINS.V2I2.245","DOIUrl":"https://doi.org/10.31848/ENSAINS.V2I2.245","url":null,"abstract":"Abstract: The Cibaduyut area is one of the largest industrial sectors of leather shoes and shopping tourism in the city of Bandung. The creative sector of leather shoes industry, Cibaduyut is also a supporting sector for Bandung's economy. However, if viewed from the point of view of City Architecture, the Cibaduyut area is not only a tourist area for shopping for leather shoes, but also can be a supporting sector for the progress of Cibaduyut and Bandung City communities. Because the Cibadunyut area has characteristics or characteristics that can support the progress of the Cibaduyut community and the city of Bandung. This research is a qualitative descriptive study using a qualitative approach that aims to provide an overview of the facts and phenomena that occur in the field. The function of the environment is built in the cibaduyut area as a regional identity. Cibaduyut has a character, which arises from the habits of the people themselves and develops, and becomes a characteristic of the Cibaduyut likungan area. The entire Cibaduyut area sells leather shoes based on Home industry, to improve the quality of its economy.Keywords: Identity, Built Environment Function in Cibaduyut Area.Abstrak: Kawasan cibaduyut merupakan salah satu sektor industri pengrajin sepatu kulit dan wisata belanja terbesar di kota Bandung. Sektor industri kreatif sepatu kulit, Cibaduyut juga menjadi sektor pendukung pendapatan perekonomian kota bandung. Namun jika dilihat dari sudut pandang Arsitektur Kota, kawasan Cibaduyut bukan hanya sebagai kawasan wisata belanja sepatu kulit saja, namun juga bisa menjadi sektor pendukung kemajuan masyarakat Cibaduyut dan Kota Bandung. Di karenakan Kawasan Cibadunyut mepunyai krakteristik atau ciri khas yang dapat mendukung kemajuan masyarakat Cibaduyut dan Kota Bandung. Penelitian ini merupakan penelitian deskriptif kualitatif dengan menggunakan pendekatan kualitatif yang bertujuan untuk memberikan gambaran mengenai fakta dan fenomena yang terjadi di lapangan. Fungsi lingkungan terbangun di kawasan cibaduyut sebagai identitas kawasan. Cibaduyut mempunyai karakter, yang timbul dari kebiasaan masyarakatnya itu sendiri dan berkembang, dan menjadi suatuh ciri khas kawasan likungan Cibaduyut. Kawasan Cibaduyut hampir keseluruhan masyarakatnya menjual sepatu kulit yang berbasis Home industry, untuk meningkatkan kualitas perokonomiannya.  Kata Kunci: Identitas, Fungsi Lingkungan Terbangun Di Kawasan Cibaduyut.","PeriodicalId":297097,"journal":{"name":"ENSAINS JOURNAL","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128445577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"KOMUNIKASI DAN IDENTITAS KULTURAL REMAJA SUKU DAWAN DI KOTA KUPANG, TIMOR BARAT, NUSA TENGGARA TIMUR","authors":"Erna Suminar","doi":"10.31848/ensains.v2i1.176","DOIUrl":"https://doi.org/10.31848/ensains.v2i1.176","url":null,"abstract":"Abstract: The purpose of this research is to identify and descripting Dawan ethnic group teenager from the rural area of South Timor Tengah regency to communicate as the part of identity conservation and development when enrolling high school or working in Kupang City. Identification and description include how they’re communicating and using traditional words, daily habits, and using social media as communication forum with the fellow Dawan ethnic group. This research method is using qualitative approach with case study. Selected observation technique, unstructured interview is utilized for data collecting. Post-teenager ethnical background interacting with the different ethnical group could shift and change their original ethnical identity. Keywords: cultural identity, dawan ethnic group, teenager, communicationAbstrak: Tujuan penelitian ini untuk mengidentifikasikan dan mendeskripsikan  remaja Suku Dawan yang berasal dari  pedalaman Kabupaten Timor Tengah Selatan dalam berkomunikasi sebagai upaya melestarikan dan mengembangkan identitas kulturalnya saat mereka menempuh sekolah lanjutan maupun bekerja di Kota Kupang. Identifikasi dan deskripsi meliputi bagaimana mereka : berbahasa dan menggunakan kata-kata, beradat kebiasaan sehari-hari dan  menggunakan media sosial sebagai forum komunikasi dengan sesama dari suku  dan daerah yang sama. Metode penelitian ini menggunakan pendekatan kualitatif dengan studi kasus. Pengumpulan data menggunakan teknik observasi terseleksi, wawancara tak terstruktur. Latar budaya etnik setelah remaja tersebut bersentuhan dengan etnik yang berbeda dan membawa pergeseran dalam identitas budaya.Keywords : identitas kultural, Suku Dawan, remaja, komunikasi.","PeriodicalId":297097,"journal":{"name":"ENSAINS JOURNAL","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129889803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CYCLE DEVELOPMENT PROCESS IMPROVEMENT IN EXTRACTION LEVEL ON PRODUCTION PLAN UNDERGROUND GRASBERG BLOCK CAVE (GBC) AT PT.FREEPORT INDONESIA","authors":"Jeffryson Munsaki Rumbewas, Akbar Adhiutama","doi":"10.31848/ENSAINS.V2I1.182","DOIUrl":"https://doi.org/10.31848/ENSAINS.V2I1.182","url":null,"abstract":"Abstract:. Development is a process of making aperture (tunnel) is done by dismantling (excavation) both manually and mechanically. The results to be obtained that is in the form of opening holes according to Grasberg Block Cave (GBC Mine) production plan based on the purpose of the open pit function. Propose is done to support other fix facility in order to support the Production Plan in 2018. Completion of a hole openings (Tunnel) with the rule that is a continuous stage (cycle development) that there must be a good control system of development process. Control that is done design engineering and its application in the field. The fact is that in 2015 - 2016, the target gain is not in line with expectations and causes the meter (d Equivalent meter) of operational development at the extraction level in the GBC Underground mine to decrease by 50 - 55% or about 641 meter up to 1000 meter difference of the second plan of the year.Identification of the current problem is the process of progress of opening aperture that has not reached the target because one of the process in the cycle development of Mucking and Hauling not achieved the target because of some basic things. The minimal information and low support of the reporting system caused some strategic decisions to be delayed and caused simultaneous cycles to experience significant constraints. A centralized and fast-accessible Information System from either input or share data by all stakeholders responsible for operational project development tunnel is very supportive. Good motivation greatly affects the performance of each stakeholder working on the project, so that the appropriate approach according to Human needs can be done in order to increase productivity.Project Management with CPM method as well as Human Resource Management (Motivation application of Abraham Maslow) becomes an option in humanizing according to the Root problem obtained by the Current Reality Tree method. The hope is that the development process runs quickly, safely and safely and operational with little operational expense and minimal repetitiveKeywords: cycle development, production plan, underground mine","PeriodicalId":297097,"journal":{"name":"ENSAINS JOURNAL","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133562257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ANALISIS KUALITAS AIR UNTUK KONSENTRASI FLUORIDE PADA SISTEM JARINGAN DISTRIBUSI AIR MINUM DENGAN FLUORIDASI","authors":"Arif Susanto, P. Purwanto, A. Hadiyarto","doi":"10.31848/ENSAINS.V2I1.149","DOIUrl":"https://doi.org/10.31848/ENSAINS.V2I1.149","url":null,"abstract":"Abstract:. The requirement of consumed drinking water so that it does not create disturbance to public health is that it needs a quality monitoring. Water fluoridation in Tembagapura City aims to reach its concentration level toward certain safe level, and it can provide maximum benefits for dental health. Analysis and simulation methods using EPAnet software. The results of hydrolic simulation and water quality for fluoride concentration of each node and link in the drinking water distribution network system have changed in every time change following the drinking water distribution segment. From hydraulic simulations, especially for head and flow at separate points, it consists of simultaneous solution in flow equivalence for every junction and headloss relationship in every link of network as a result of hydraulic balancing. New segment will be made at the end of each link that receives inflow from a node if the quality of the new node is different from the link in the last segment. Every pipe in network contains singular segment where the water quality is in line with the preliminary quality stated in the preliminary node. With the availability of hydraulic model and water quality for fluoride concentration, a further research can be conducted for chlorine decay, growth of by product i.e. Trihalomethans (THMs) as well as water age simultaneously in drinking water supply systems in Tembagapura City.  Keyword: EPAnet, distribution network, fluoride concentration. Abstrak: Persyaratan kualitas air minum yang dikonsumsi masyarakat agar tidak menimbulkan gangguan kesehatan, maka penyelenggara air minum perlu melakukan pemantauan kualitasnya. Fluoridasi air di Kota Tembagapura ditujukan untuk mencapai tingkat konsentrasi fluoride pada level tertentu yang aman dan dapat memberikan manfaat maksimal bagi kesehatan gigi. Metode analisis dan simulasi menggunakan perangkat lunak EPAnet. Hasil simulasi hidrolis dan kualitas air untuk konsentrasi fluoride pada setiap node dan link pada sistem jaringan distribusi air minum berubah pada setiap perubahan waktu mengikuti segmen distribusi air minum tersebut. Dari simulasi hidrolis, khusus untuk head dan aliran pada titik yang terpisah meliputi penyelesaian secara simultan dalam persamaan aliran untuk tiap sambungan (junction), dan hubungan headloss pada setiap link pada jaringan sebagai akibat dari hydrolic balancing. Segmen baru terbentuk pada akhir dari setiap link yang menerima inflow dari sebuah node, jika kualitas node baru berbeda dari link pada segmen terakhir. Setiap pipa dalam jaringan mengandung segmen tunggal, di mana kualitas air sebanding dengan kualitas awal yang ditetapkan di node awal. Dengan tersedianya model hidrolis dan kualitas air untuk konsentrasi fluoride, maka dapat dilakukan penelitian lanjutan untuk peluruhan klorin, pertumbuhan by product yaitu trihalomethans (THMs) serta usia air secara simultan pada sistem penyediaan air minum di Kota Tembagapura.Kata Kunci: EPAnet, jaringan distri","PeriodicalId":297097,"journal":{"name":"ENSAINS JOURNAL","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130888248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PENGARUH WAKTU CURING TERHADAP KUAT TEKAN GEOPOLIMER BERBASIS FLY ASH","authors":"Andrie Harmaji, Claudia Claudia, Lia A T W Asri, Bambang Sunendar, A. Nuruddin","doi":"10.31848/ENSAINS.V2I1.152","DOIUrl":"https://doi.org/10.31848/ENSAINS.V2I1.152","url":null,"abstract":"Abstract:. Suralaya power plant produces fly ash about 219.000 ton per year. Fly ash contents of silica and alumina as major components that can be used as precursors for geopolymer, a three dimensional networks aluminosilicate polymers. This research aim is to utilize fly ash for geopolymer made by mixing fly ash, fine aggregate, and alkali activator in a cubic mould and curing was carried out at room temperature for 7 and 28 days. After 28 days of curing the compressive strength of geopolymer reached 41.70 MPa. XRD characterization shows Albite (NaAlSi3O8) formation which has similarity to geopolymer compound. Fourier Transform Infra Red spectra show siloxo and sialate bond. These are typical functional groups that are found in geopolymer materials.Keyword: geopolymer, fly ash, aluminosilicate, alkali activator, albite, siloxo, sialateAbstrak: Pembangkit Listrik Tenaga Uap (PLTU) Suralaya menghasilkan fly ash (abu terbang) sekitar 219.000 ton per tahun. Fly ash memiliki silika dan alumina sebagai komponen utama yang dapat digunakan sebagai prekursor untuk geopolimer, suatu material polimer aluminosilikat tiga dimensi. Penelitian ini bertujuan untuk memanfaatkan fly ash untuk geopolimer yang dibuat dengan mencampur fly ash, agregat halus, dan aktivator alkali dalam cetakan kubik dan pengawetan dilakukan pada suhu kamar selama 7 dan 28 hari. Setelah 28 hari curing kekuatan tekan geopolimer mencapai 41,70 MPa. Karakterisasi XRD menunjukkan pembentukan Albite (NaAlSi3O8) yang memiliki kemiripan dengan senyawa geopolimer. Hasil spektroskopi Fourier Transform Infra Red (FTIR) menunjukkan ikatan siloxo dan sialate yang merupakan gugus fungsional khas yang ditemukan dalam geopolimer.Kata Kunci: geopolimer, abu terbang, aluminosilikat, alkali aktivator, albite, siloxo, sialate","PeriodicalId":297097,"journal":{"name":"ENSAINS JOURNAL","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123495480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}