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Specta Journal of Technology

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Published by Institut Teknologi Kalimantan

ISSN : 25492713 EISSN : 26229099 DOI : https://doi.org/10.0610/specta.v2i3

Core Subject : Science, Social, Engineering,

Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Environmental Science

SPECTA journal is published by Lembaga Penelitian dan Pengabdian kepada Masyarakat, Institut Teknologi Kalimantan, Balikpapann Indonesia. SPECTA is an open-access peer reviewed journal that mediates the dissemination of academicians, researchers, and practitioners in the field of Physics, Mathematics, Mechanical Engineering, Electrical Engineering, Chemical Engineering, Materials and Metallurgy, Civil Engineering, Industrial Engineering, Naval Engineering, Urban Planning, Informatics, Information System, Environmental Engineering, and Ocean Engineering. SPECTA accepts submission from all over the world, especially from Indonesia.

Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)

Articles 10 Documents

Search results for , issue "Vol. 5 No. 2 (2021): SPECTA Journal of Technology" : 10 Documents clear

Influence of Mango Polyphenol Treatment in Mechanical Properties of Dendrocalamus Asper Bamboo Teodoro Astorga Amatosa; Michael E. Loretero; Evelyn B. Taboada; Kramer Joseph Lim
SPECTA Journal of Technology Vol. 5 No. 2 (2021): SPECTA Journal of Technology
Publisher : LPPM ITK

In this study, the effectiveness of mango polyphenol (MPP) powder in seawater pH 7.4 as a natural treatment on the mechanical properties of unidirectional full culm bamboo (Dendrocalamus asper) was investigated. Our observations are explained through the changes in MPP percentage of 5, 10, and 20 of the raw material upon treatment, where the 10% amount of MPP are dominant in compressive strength with 43.83 MPa at the top part (nodal), 10% amount of MPP in compressive strength with 47.13 MPa at the middle part (non-nodal), and 5% in flexural strength with 43.07 MPa at the top part. The treatment process combining sea-water absorption plus mango polyphenol powder is more effective in improving mechanical properties with MPP variations than using them alone. Finally, materials identified as having favorable effects on full bamboo culm.

Penerapan Metode Fuzzy Tsukamoto untuk Mengidentifikasi Banjir Berdasarkan Curah Hujan dan Suhu di Kota Balikpapan pada Tahun 2015 sampai 2019 Ria Adha Sulistyowati; Nashrul Millah
SPECTA Journal of Technology Vol. 5 No. 2 (2021): SPECTA Journal of Technology
Publisher : LPPM ITK

Flooding occurred in several areas in Balikpapan is still a big issue. Floods that occurred in several places in Balikpapan were basically caused by the unavailability of trenches and places to drain rainwater. This causes rainwater going straight down the road and creating a puddle. One way to anticipate the occurrence of floods is to know the conditions that trigger floods, which are rainfall and air temperature. For this reason, it is a necessary to create a classification system for the level of rainfall and air temperature that affect flooding. The method that can be used for this problem is fuzzy logic, specifically the Tsukamoto method. Tsukamoto method of fuzzy logic is one of the most frequently used methods for prediction. Therefore, method can be used to identify floods. Input variables used in this study are rainfall and temperature, while the output variable is flood or not flood.

Penerapan Business Intelligence pada Data Cuaca Badan Meteorologi, Klimatologi, dan Geofisika (BMKG) Melinda Andriyati; Soleh Ardiansyah; Muhammad Gilvy Langgawan Putra
SPECTA Journal of Technology Vol. 5 No. 2 (2021): SPECTA Journal of Technology
Publisher : LPPM ITK

As systems and methods that analyze data, Business Intelligence aims to gain insight. BMKG Kota Balikpapan has an obstacle in data management which takes almost two days. Data management consists of data processing, data analysis, data storage, and data accessing. BMKG Kota Balikpapan's problem can be answered by using Pentaho which is a proper tool for presenting the information from data management processes to gain knowledge. Business Intelligence implementation was performed by adopting a business intelligence roadmap: the business analysis phase, design phase, construction phase, and deployment phase. In conclusion, weather data processing into normal data by Pentaho has been done successfully. Normal data consists of normal data of rainfall, temperature, and humidity, which will be displayed on the dashboard created using Pentaho. The dashboard was displayed on the website localhost that has been built by using the MySQL database as a data storage and Pentaho in conducting the analysis and creation of the dashboard. Forecast for average temperature data in January 2019 also has been done by using Weka. The results of the comparison of original data and forecasting data showed a difference of 0.0573. The comparison of the data shows that Weka can be used as an alternative tool for BMKG of Balikpapan to weather forecasts.

Usulan Strategi Pemasaran Menggunakan Blue Ocean Strategy (BOS) pada Usaha Kecil Menengah Pempek Ogan Palembang Muhammad Nur; Fitriani Surayya Lubis; Chilsy Vebiola Sandy; Ekie Gilang Permata; Silvia Silvia
SPECTA Journal of Technology Vol. 5 No. 2 (2021): SPECTA Journal of Technology
Publisher : LPPM ITK

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.

Analisis Pengaruh Variasi Temperatur Proses Pack Carburizing Terhadap Laju Korosi Material Baja Karbon ASTM A36 Ade Wahyu Yusariarta Putra Parmita; Bobby Chandra Priyandoko; Hizkia Alpha Dewanto; Rifqi Aulia Tanjung; Satrio Alam Bramantyo; Rizki Febriyanto
SPECTA Journal of Technology Vol. 5 No. 2 (2021): SPECTA Journal of Technology
Publisher : LPPM ITK

Baja ASTM A36 tergolong ke dalam baja struktural, penggunaannya banyak dalam dunia industri misal konstruksi jembatan, struktur bangunan, roda gigi, dan konstruksi kapal. Baja ASTM A36 memiliki beberapa kekurangan yaitu kapasitas kedalaman pengerasannya yang rendah, ketahanan korosi yang buruk, dan sifat mekanik seperti kekerasan yang relatif rendah. Oleh karena itu, untuk menanggulangi permasalahan baja ASTM A36 maka dilakukan proses pengerasan permukaan menggunakan metode pack carburizing dengan menggunakan variasi temperatur 850, 900, dan 950ºC dan waktu tahan selama 2 jam menggunakan karbon aktif konvensional dan energizer dari cangkang telur. Pengujian yang dilakukan meliputi pengujian struktur mikro, dan pengujian laju korosi (polarisasi linier). Hasil yang diperoleh yaitu proses pack carburizing berpengaruh terhadap laju korosi dari baja ASTM A36 dengan ditunjukkan oleh penurunan laju korosi yang terjadi, sementara variasi temperatur pada proses pack carburizing terhadap laju korosi dari baja ASTM A36 tidak berpengaruh secara signifikan. Variasi temperatur optimal dalam proses pack carburizing terhadap laju korosi baja ASTM A36 diperoleh pada spesimen C1 dengan variasi temperatur karburisasi sebesar 850°C dan terjadi penurunan laju korosi sebesar 48,6% dari spesimen N (tanpa perlakuan).

Review: Potensi Pengembangan Membran Polimer Hidrofilik untuk Produksi Biodiesel Berbasis Mikroalga Widi Citra Lestari; Ellyzia Sukma Ningtiar; Mochammad Yusuf Irianto; Nurul Widiastuti
SPECTA Journal of Technology Vol. 5 No. 2 (2021): SPECTA Journal of Technology
Publisher : LPPM ITK

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.

Sifat Mekanik Produk Metalurgi Serbuk dari Proses Ball Milling dengan Bahan Baku Al7075 Terhadap Variasi Temperatur Sinter dan Tekanan Kompaksi Hizkia Alpha Dewanto; Muhammad Zaini Abdi; Achmad Maulana; Ainun Zulfikar; Gusti Umindya Nur Tajalla
SPECTA Journal of Technology Vol. 5 No. 2 (2021): SPECTA Journal of Technology
Publisher : LPPM ITK

Powder metallurgy samples, made from Al7075 powder from ball milling, were produced and investigated. Samples were subjected to two different variables, those were compaction pressure and sintering temperatur. Compaction pressure variables were 250, 300, and 350 MPa with constant sintering temperatur of 505oC. Sintering temperatur variations were 425, 465, and 505oC with constant compaction pressure of 350 MPa. The results of density measurement and hardness test were directly proportional to both of research variables, whereas the porosity was inversely proportional. The properties of sample with variables of 350 MPa compaction pressure and 505oC sintering temperatur were the closest one to conventional Al7075, with density of 2.173 g/cm3, 22.2% porosity, and 12.56 VHN hardness. The properties of conventional Al7075 sample were 2.8 g/cm3 density, 0.26% porosity, and 12.68 VHN hardness. The abrupt increase of hardness between 465oC and 505oC sintering temperatur was similar in pattern of its porosity decrease. This means optimum porosity decrease was started between 465oC and 505oC which affecting hardness increase. Highest hardness of powder metallurgy Al7075, which was 99% of conventional Al7075 and porosity of 22.2%, suggested wide application potential of Al7075 produced by powder metallurgy.

An Analyze Stability of Traditional Boat in Riau Island Sapto Wiratno Satoto
SPECTA Journal of Technology Vol. 5 No. 2 (2021): SPECTA Journal of Technology
Publisher : LPPM ITK

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.

Identifikasi Kandungan Batubara Cair Tipe Lignit Menggunakan Metode Pirolisis Daerah Kecamatan Pasir Balengkong Provinsi Kalimantan Timur Muthia Putri Darsini Lubis; Denny Rizky Hervani; Nia Sasria
SPECTA Journal of Technology Vol. 5 No. 2 (2021): SPECTA Journal of Technology
Publisher : LPPM ITK

Batubara merupakan endapan senyawa organik karbonan yang terbentuk secara alamiah dari sisa tumbuh-tumbuhan dan bisa terbakar. Batubara mempunyai beberapa tipe yaitu antrasite, bituminous, sub-bituminous dan lignite. Pembagian jenis batubara dibagi menjadi sumber penghasil energi primer dan penghasil energi sekunder, dimana nilai jual batubara tipe lignit sebagai penghasil energi sekunder sangatlah rendah sehingga perlu dilakukan inovasi untuk mengubah batubara tipe lignit, salah satunya dengan metode pencairan batubara. Pada penelitian ini dilakukan pencairan batubara kualitas rendah yaitu lignit dan kemudian dilakukan pengujian GCMS untuk mengetahui kandungan pada minyak batubara pada batubara tipe lignit. Batubara yang digunakan berasal dari daerah Pasir Balengkong Tanah Grogot Kalimantan Timur, analisis menggunakan penambahan waktu pengambilan sampel setiap 2 jam dengan maksimal waktu operasional 6 jam. Proses pencairan batubara pertama-tama dilakukan pengujian proksimat untuk mengetahui kandungan kalori dari batubara dan volatile matter yang terkandung pada batubara sampel, kemudian dilakukan pencairan yaitu batubara yang masih berbentuk raw coal di timbang sehingga didapatkan berat 16kg, batubara yang telah di cairkan dimasukan kedalam tungku pirolisis dan kemudian dilakukan pembakaran dengan penambahan waktu dan temperatur 2 jam (0 – 200oC), 4 jam (200o – 400oC), dan 6 jam (400o – 600oC). Pengujian GCMS dilakukan untuk mengetahui kandungan pada minyak batubara, hasil pengujian menunjukan batubara lignit daerah pasir balengkong mempunyai kandungan golongan alkana, aldehid, dan fenol.

Pengerasan Baja AISI 316L Menggunakan Metode Pack Carburizing Bersumber Karbon Kayu Mahoni muhammad ghufron; Istiroyah Istiroyah; Rena Wahju Dhiaul In’am
SPECTA Journal of Technology Vol. 5 No. 2 (2021): SPECTA Journal of Technology
Publisher : LPPM ITK

Peningkatan kekerasan paduan baja dapat dilakukan dengan meningkatkan kandungan karbon dipermukaanya. Baja AISI 316 L yang memiliki kekerasan awal 189 HV300 dapat ditingkatkan kekerasannya melalui peningkatan jumlah karbon dipermukaan dengan metode pack carburizing. Pada penelitian ini kayu mahoni digunakan sebagai sumber karbon aktif yang diperoleh dengan pemanasan dan pengayakan 150 mesh. Pack carburizing dilakukan pada suhu tinggi yakni 700oC, 750oC, 800oC dan 850oC selama 8 dan 16 jam yang kemudian dilakukan uji kekerasan menggunakan micro vickers hardness tester. Semua spesimen hasil pack carburizing mengalami kenaikan kekerasan dibandingkan dengan spesimen tanpa perlakuan dengan range kenaikan sebesar 24-367 HV3. Kekerasan tertinggi diperoleh pada pemanasan selama 16 jam pada suhu 700oC. Hasil pengujian sudut kontak menunjukkan adanya perubahan sifat pada permukaan dari hidrofilik ke hidrofobik untuk semua sampel sementara dari hasil mikroskop optik diperoleh distribusi ukuran butir kurang dari 60 µm dengan dominan range 15-25 µm.

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Contact Name
Syamsul Mujahidin

Contact Email
syamsul@lecturer.itk.ac.id

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+6285931379488

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spectajournal@itk.ac.id

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Ruangan LPPM Gedung A lantai 2, Kampus ITK, Jl Soekarno Hatta KM 15, Karang Joang, Balikpapan, Balikpapan Utara, KALTIM

Location
Kota balikpapan,

Kalimantan timur

INDONESIA

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Syamsul Mujahidin

Contact Email syamsul@lecturer.itk.ac.id

Phone +6285931379488

Journal Mail Official spectajournal@itk.ac.id

Editorial Address Ruangan LPPM Gedung A lantai 2, Kampus ITK, Jl Soekarno Hatta KM 15, Karang Joang, Balikpapan, Balikpapan Utara, KALTIM

Location Kota balikpapan, Kalimantan timur INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Syamsul Mujahidin

Contact Email
syamsul@lecturer.itk.ac.id

Phone
+6285931379488

Journal Mail Official
spectajournal@itk.ac.id

Editorial Address
Ruangan LPPM Gedung A lantai 2, Kampus ITK, Jl Soekarno Hatta KM 15, Karang Joang, Balikpapan, Balikpapan Utara, KALTIM

Location
Kota balikpapan,

Kalimantan timur

INDONESIA