Specta最新文献

{"title":"An Analyze Stability of Traditional Boat in Riau Island","authors":"Sapto Wiratno Satoto","doi":"10.35718/SPECTA.V5I2.325","DOIUrl":"https://doi.org/10.35718/SPECTA.V5I2.325","url":null,"abstract":"Traditional boat are quite important means of transportation in the Riau Islands because of their natural contours consisting of islands. Boat is the main transportation and also lest costs because it only uses simple technology and simple maintenance. This paper is aims to investigate the traditional boat of Riau's curiosity. It is used to find the things that must be prepared with possible dangers arising from the stability of the boat. This research was conducted by collecting data on the main dimension of the traditional boats used in the Riau Islands. From the main dimensions, measurements are made of the shape of the vessel using digital equipment (infrared) combined with simple equipment to obtain maximum results. From the measurement results, then the simulation is carried out using software with several criteria to get the desired results. From the research results, it is found that the boat still has adequate stability on the: lightweight condition, lightweight with 1 person on board and engine, lightweight with one person onboard with engine and even load. In the future, research will continue to simulate loading when the boat will be used to transport people, luggage with variations in wave angle and boat direction.","PeriodicalId":33910,"journal":{"name":"Specta","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49019424","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":"Review: Potensi Pengembangan Membran Polimer Hidrofilik untuk Produksi Biodiesel Berbasis Mikroalga","authors":"Widi Citra Lestari, Ellyzia Sukma Ningtiar, Mochammad Yusuf Irianto, Nur Widiastuti","doi":"10.35718/SPECTA.V5I2.280","DOIUrl":"https://doi.org/10.35718/SPECTA.V5I2.280","url":null,"abstract":"Harvesting microalgae is an important process to be carried out in the production of biodiesel from microalgae. The method of harvesting by filtration technique provides many advantages over other methods. Polymer is a membrane material that is often used for harvesting microalgae. However, polymer membranes have limited hydrophobic properties, thus, modification was needed to improve the hydrophilic properties and performance of polymer membranes. The polyvylene fluoride (PVDF) flat-sheet membrane has advantages over other membrane materials which are rated with a flux rate of 67.3 L / m2h and a rejection value of 100%. Then, the development with hollow fiber modulation on the PVDF membrane was considered very suitable, which was reported to have succeeded in increasing the membrane flux in the harvest of Scenedemus Acuminatus reaching up to 5136 L / m2h. The addition of PVDF with the inorganic additive LiCl was successful in increasing its hydrophilicity as  the water permeation size increased up to 542 L / m2h. In addition, the use of triethyl phosphate (TEP) as a solvent is more environmentally friendly and compatible with PVDF membranes. As a result, it can increase membrane porosity by up to 92.7%. Apart from improving the membrane material, this review also reports the design and economic analysis to produce an effective and efficient of polymeric membranes for microalgae harvesting.","PeriodicalId":33910,"journal":{"name":"Specta","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47402441","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":"Usulan Strategi Pemasaran Menggunakan Blue Ocean Strategy (BOS) pada Usaha Kecil Menengah Pempek Ogan Palembang","authors":"Muhammad Nur, Fitriani Surayya Lubis, Chilsy Vebiola Sandy, Ekie Gilang Permata, S. Silvia","doi":"10.35718/SPECTA.V5I2.265","DOIUrl":"https://doi.org/10.35718/SPECTA.V5I2.265","url":null,"abstract":"UKM Pempek Ogan is a small industry engaged in the food sector. This UKM was founded in 2007. The main problem of UKM Pempek Ogan Palembang is the slow and monotonic development and business innovation i.e. the promotion strategy implemented is not well designed to increase sales and compete with similar businesses. Consequently, the business experienced declined sales and therefore, reducing revenues if appropriate measures are not taken. The purpose of this research is to develop new strategies, marketing strategies, by creating new innovations for UKM Pempek Ogan Palembang using Blue Ocean Strategy. The Blue Ocean Strategy is a method to develop a new value innovation that is not yet owned by competitors to divert from intense competition among business actors. The BOS method has several steps in its application, namely the creation of a strategy canvas, the creation of a four-step framework i.e. eliminating, enhancing, reducing, and creating, of the creation of three characteristics of a good strategy, namely focus, divergence and motto. Our findings from the strategy canvas suggested that there are several indicators whose values ​​are below competitors. The new innovation applied to UKM Pempek Ogan Palembang as a diversion from competitors by the framework of four steps is to reduce a product price. Moreover, product variants, social media advertising, sales promotion, employee appearance, cleanliness and comfort of the place as well as poor-designed-banners should be improved. We suggested frozen pempek and pempek with unique shapes are created for new and fresh looks as a new innovation.","PeriodicalId":33910,"journal":{"name":"Specta","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43075833","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":"Perancangan dan Evaluasi UI/UX Aplikasi E-Learning Berbasis Gamification Menggunakan Metode Cognitive Walktrough","authors":"M. L. Putra, Wira Maulana","doi":"10.35718/specta.v4i3.257","DOIUrl":"https://doi.org/10.35718/specta.v4i3.257","url":null,"abstract":"E-Learning merupakan sebuah media pembelajaran secara online dengan menggunakan jaringan elektronik. Saat ini telah banyak E-Learning yang tersebar diseluruh dunia, akan tetapi dibutuhkan suatu hal yang dapat meningkatkan motivasi belajar para pelajar. Menggunakan metode Gamification yang mana metode ini mengadopsi konsep serta pemikiran pada suatu permainan yang kemudian diterapkan kedalam aktivitas bukan permainan dan dengan rancangan desain user interface E-Learning berbasis Gamification yang baik, selain dapat membantu memperluas media dalam pembelajaran juga dapat meningkatkan minat belajar serta motivasi pelajar dalam belajar. Untuk mengetahui apakah hasil rancangan desain user interface telah baik serta sesuai dengan kebutuhan, diperlukan sebuah evaluasi. Terdapat banyak metode evaluasi, salah satunya yaitu metode Cognitive Walktrough. Metode ini dilakukan dengan beberapa responden melakukan tugas yang telah diberikan serta wawancara kepada responden. Melalui penelitian ini diketahui bahwa masalah paling banyak muncul pada grade 3 dengan tingkat keseriusan rendah yaitu 4 sebesar 0,33. Jenis Masalah yang paling sering ditemukan yaitu Text and Icon dengan angka sebesar 0,07 yang muncul pada grade 4, 3, dan 2 tepatnya pada tugas nomor 3, 4, 5, 6, dan 7. Kemudian masalah ditemukan paling banyak pada tugas nomor 3 dan 6 dengan angka sebesar 0,33. Angka-angka yang ditunjukan terbilang kecil sehingga tidak banyak berpengaruh pada jalannya sistem.","PeriodicalId":33910,"journal":{"name":"Specta","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44234211","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":"The Development of Space Surveillance Settlement Concept in Pesantren Gadingmangu Perak Jombang","authors":"Kurniadi Kurniadi, Arif Jauhar Tontowi Arif Jauhar Tontowi, Eko Wahyudi","doi":"10.35718/specta.v1i3.83","DOIUrl":"https://doi.org/10.35718/specta.v1i3.83","url":null,"abstract":"The existence of Gadingmangu Pesantren in the middle of the global can become one of the interesting object to study, considering that this pesantren is improved of education area. Since the beginning of this pesantren, they have lived in harmony with the community. If observed, there is a strong will to protect traditional culture in the middle of the global culture this day.There are three problem which considered in this research. First is to see how the interaction process between the pesantren and the surrounding societies, and which space and environment setting have a function as media for social interaction between the pesantren and the neighbourhood. Second, how is the attitude and behavior of the community about the existence of Gadingmangu Pesantren settlement. The aims of this study is to see cultural values of pesantren which used in the settlement.Methodology used is field research to study physical and non physical aspect intensively. Area of architecture, environment psychology, and sociology, covers settlement and cultural values of pesantren at Gadingmangu. The research results is to find the concept of space surveillance settlement can be considered by physical aspects. Physically, there is a setting which reflect strong interaction between the pesantren Gadingmangu and the settlement nearly.","PeriodicalId":33910,"journal":{"name":"Specta","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44942199","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":"Characterization of Bark-Midrib Fibers using Chemical Treatment Variations as Reinforcement in Bark-Midrib Fiber Composites","authors":"O. -","doi":"10.35718/specta.v3i2.154","DOIUrl":"https://doi.org/10.35718/specta.v3i2.154","url":null,"abstract":"Bark midrib are not fully utilized. Utilize the characterization of the fiber and process it into polymer composites with natural fiber reinforcement. The study was conducted using a variety of chemical treatments in the form of bark midribs without treatment, delignification treatment that is immersion using NaOH media concentration of 1%, 5%, 10% with 3 hours immersion time and bleaching treatment using H2O2 media 2% concentration with immersion time 30, 60 and 90 minutes. In obtaining suitable properties, tensile tests, impact tests, Scanning Electron Microscopy (SEM) images, and Fourier-Transform Infra-Red (FTIR) tests are performed. Optimal delignification treatment at 5% NaOH concentration with a tensile test value of 25.47 MPa (increasing 76.86%) and an impact test value of 11.95 kJ/m2 (increasing 11.45%). The optimal bleaching treatment at 90 minutes immersion with a tensile test value of 35.09 MPa (increased 36.36%) and impact test value of 13.77 kJ/m2 (increased 15.22%). The results of SEM images show that the bark midrib fiber composite without treatment has a lousy interface, delignification treatment with a reasonable good interface, and bleaching treatment with an excellent interface. FTIR test results showed that the bark midrib fiber composite without treatment had a cellulose component but hemicellulose and lignin levels still dominated. Based on the results of the study, bark midrib fiber with delignification chemical treatment using 5% NaOH for 3 hours followed by bleaching treatment using 2% H2O2 for 90 minutes is the treatment with the best results and then applied to a natural fiber composite product.","PeriodicalId":33910,"journal":{"name":"Specta","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41787901","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":"Studi Metode Pendinginan Super Cepat untuk Pembentukan Bulk Metallic Glasses pada Paduan Cu45Zr45Al5Ag5","authors":"Andromeda Dwi Laksono, Rifqi Aulia Tanjung","doi":"10.35718/specta.v3i2.41","DOIUrl":"https://doi.org/10.35718/specta.v3i2.41","url":null,"abstract":"Bulk Metallic Glass (BMG) memiliki sifat mekanik, magnetik, kimia dan fisik yang berbeda dengan paduan polikristalin karena susunan internal atomnya yang tidak teratur. Sehingga, BMG memiliki kekuatan mekanik yang baik, kekerasan yang tinggi, ketahanan terhadap aus dan korosi yang tinggi, dan kehalusan permukaan yang baik. Berdasarkan sifat tersebut, BMG memiliki kelayakan yang menjanjikan di bidang industry. Dalam penelitian ini, metode pengecoran cetakan di tembaga digunakan untuk menyiapkan BMG paduan Cu45Zr45Al5Ag5. Paduan dileburkan ulang dengan pendinginan super cepat menggunakan mesin pendingin di bawah temperatur -25 oC. Dengan metode pengecoran cetakan di tembaga, sampel ukuran besar berbentuk batang dipotong dengan diameter 2 mm hingga 4 mm dan panjang 30 mm. Batang kemudian dipotong lagi menjadi spesimen berbentuk cakram. Untuk memastikan apakah sampel adalah BMG atau tidak, sampel dievaluasi dengan Scanning Electron Microscopy (SEM), Energy Dispersion Spectrometer (EDS), Differential Scanning Calorimetry (DSC), Electron Probe X-ray Micro Analyzer (EPMA), dan X -ray Difraction (XRD). Hasilnya dibahas dalam penelitian ini. \u0000Kata Kunci: Bulk Metallic Glasses, Cu45Zr45Al5Ag5, Pengecoran Cetakan di Tembaga.","PeriodicalId":33910,"journal":{"name":"Specta","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45781584","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 Rangkaian Full Wave Rectifier dengan Filter Kapasitor, Pembagi Tegangan, Buffer dan Penguat Differensial pada Sensor Arus","authors":"Andhika Giyantara, Vicky Mudeng, R. Ramadhani, Rizky Wulandari","doi":"10.35718/specta.v3i2.44","DOIUrl":"https://doi.org/10.35718/specta.v3i2.44","url":null,"abstract":"Abstrak \u0000Penelitian ini menyajikan perancangan dan analisis sebuah sensor arus yang terdiri dari rangkaian penyearah gelombang penuh dengan filter kapasitor, pembagi tegangan, buffer, dan penguat diferensial. Metode yang digunakan untuk mengukur nilai arus pada sensor adalah dengan menetapkan salah satu resistor pada rangkaian pembagi tegangan sebagai resistor referensi (Rs). Metode ini didasarkan pada hukum Ohm dalam menentukan nilai arus yang melalui suatu jalur. Hasil percobaan yang dilakukan telah membuktikan teori yang disajikan. \u0000 \u0000Kata Kunci: metode resistif, pengukuran arus, rangkaian sensor arus.","PeriodicalId":33910,"journal":{"name":"Specta","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49392836","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":"Desain Rute Jaringan Moda Bus Kota di Balikpapan sebagai Antisipasi Kemacetan di Balikpapan","authors":"W. Winarni, Evina Rahmatya Pratiwi, S. Subchan","doi":"10.35718/specta.v2i3.39","DOIUrl":"https://doi.org/10.35718/specta.v2i3.39","url":null,"abstract":"Abstract. Public transport facilities are fundamental needs as population growth and society mobility increases. Nowadays, Balikpapan is one of the cities growing quite rapidly, including the level of society mobility. If it is not anticipated, this could lead Balikpapan becomes a crowded city such as Jakarta, Surabaya, Bandung and others. One of public transportation in Balikpapan is angkot which has capacity only about 10 passengers. Others are taxi and online transportation such as Gojek, Go-Car, and Grab. These are not yet the appropriate solution for public transportation services for all levels of society. Thus, it needs to be developed the integrated mass public transportation system in Balikpapan and become an alternative solution to the problems. One of the public demands in using public transportation service is passengers can reach any location from anywhere (strongly connected). Therefore, it is necessary to design the route of mass public transport system such as city busway. In this paper it is called Trans Balikpapan Busway. In this paper, we use graph concept to design Trans Balikpapan Busway route. The result is the design of Transbalikpapan Busway route. It is ilustrated by a directed graph. The matrix that represents the graph has unique eigen value, so that the graph is strongly connected. It connects all districts in Balikpapan with places that people ussually visit such as schools/campuses, shops, malls, hospitals, terminals, air port, harbour, institutions, companies, recreation destinations, etc. \u0000Abstrak. Fasilitas transportasi umum merupakan kebutuhan vital seiring pertumbuhan penduduk dan mobilitas masyarakat meningkat. Saat ini, Balikpapan adalah salah satu kota yang berkembang cukup pesat, termasuk tingkat mobilitas masyarakat. Jika tidak diantisipasi, ini dapat menyebabkan Balikpapan menjadi kota yang padat seperti Jakarta, Surabaya, Bandung dan lain-lain. Salah satu angkutan umum di Balikpapan adalah angkutan kota yang kapasitasnya hanya sekitar 10 penumpang. Angkutan umum lainnya adalah taksi argo dan transportasi online seperti Gojek, Go-Car, dan Grab. Itu pun belum menjadi solusi yang tepat untuk layanan transportasi umum bagi semua lapisan masyakat. Dengan demikian, perlu dikembangkan sistem transportasi umum massal terpadu di Balikpapan dan menjadi solusi alternatif untuk masalah tersebut. Salah satu tuntutan masyarakat dalam menggunakan layanan angkutan umum adalah penumpang dapat mencapai suatu lokasi dari mana saja (strongly connected). Oleh karena itu, perlu dirancang rute sistem transportasi umum massal seperti moda bus kota. Dalam hal ini dinamakan Trans Balikpapan Busway. Dalam paper ini, digunakan konsep graf untuk merancang rute Trans Balikpapan Busway. Hasil penelitian ini adalah desain rute Transbalikpapan Busway. Jaringan Transbalikpapan Busway diilustrasikan dalam graf berarah. Matriks yang mewakili graf tersebut memiliki nilai eigen yang tunggal/unik, sehingga dapat disimpulkan graf tersebut stron","PeriodicalId":33910,"journal":{"name":"Specta","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69928660","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":"Studi Ketahanan Benturan pada Komposit Serat Rami-epoksi dan Polimer Blend ABS-PP untuk Aplikasi Bahan Alternatif Soket Prostesis","authors":"Fadli Robiandi, Menasita Menasita, Ikal M","doi":"10.35718/specta.v2i3.17","DOIUrl":"https://doi.org/10.35718/specta.v2i3.17","url":null,"abstract":"Fabrication of rami fiber based on composite with epoxy matrixs and polymer blend of ABS-PP for alternative prosthetic soket application have been conducted. This research attemp to analyze impact resistance of rami-epoxy based on composite and polymer blend base ABS-PP. Those sample was made by hand lay up and simple hot casting methode at a temperature of 250 oC. rami-epoxy based on composite and polymer blend samples with volume fraction variation 0%, 25%, 50% and 75%. The result of charpy impact test showed an increase in impact energy along with an increase in the volume fraction of rami. In other hand, an increase in ABS volume fraction could reduce the impact energy of polymer blend samples. From impact testing result, both samples showed brittle like-structure. Broken Fiber with low fiber pull out mechanism was found out in rami-epoxy composite samples. Polymer blend samples showed pull out mechanism on ABS grain.","PeriodicalId":33910,"journal":{"name":"Specta","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47217660","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}