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Jurnal IPTEK
Published by Institut Teknologi Adhi Tama Surabaya
ISSN : 14117010     EISSN : 2477507X     DOI : -
Core Subject : Science, Engineering,
Civil Engineering, Building, Construction & Architecture Computer Science & IT Industrial & Manufacturing Engineering Mechanical Engineering
Jurnal IPTEK - Media Komunikasi Teknologi Diterbitkan secara berkala setahun 2 (dua) kali pada bulan Mei dan Desember oleh Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM), Institut Teknologi Adhi Tama Surabaya (ITATS). Jurnal ini memuat hal-hal yang berkaitan dengan bidang Teknik Sipil, Teknik Mesin, Teknik Elektro, Teknik Arsitektur, Teknik Perkapalan, Teknik Informatika, Teknik Industri, Teknik Kimia, Teknik Lingkungan, Teknik Pertambangan, Teknik Geologi, Desain Produk, Sistem Informasi, dan Sistem Komputer baik yang ditulis dalam bahasa Indonesia maupun bahasa Inggris (diutamakan).
Arjuna Subject : -
Articles 378 Documents
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CLASSIFICATION OF ROASTING RATES IN COFFEE BEANS BY DIGITAL IMAGE PROCESSING USING THE NAIVE BAYES CLASSIFIER (NBC) METHOD Hidayat, M. Mahaputra; Prasetyo, Eko; Wicaksono, Bambang Teguh
Jurnal IPTEK Vol 27, No 1 (2023)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2023.v27i1.3697

Abstract

Coffee is the bean of the coffee plant and is the source of coffee drinks. Coffee beans must pass through the coffee roasting stage or also called coffee roasting, from this stage of the process the coffee will be roasted and this process also has its own level. At this stage of the roasting process coffee shop business people often do not know this process, then in this case used Local Binary Pattern (LBP) method. LBP is a simple and very efficient texture operator by labeling pixels by doing thresholding on each pixel neighbors and considers the result as a binary number. This method is used to obtain the texture ektrasi of an image. While for the classification method using the Naive Bayes Classifier (NBC) method. Naive Bayes is a simple probabilistic classifier that calculates a set of probabilities by summing the frequencies and combinations of values from a given dataset. The algorithm uses Bayes' theorem and assumes all the independent or non-interdependent attributes given by the values on the class variables. From the test results by comparing training data and testing data obtained an accuracy rate of 81%. For an image-based developed system with display recognition difficulties, this performance is good.
Critical Barriers in Reverse Logistics Implementation: Case Study on Construction Machinery Remanufacturing Company in Indonesia Yuliawati, Evi; Suroso, Hastawati Chrisna
Jurnal IPTEK Vol 25, No 2 (2021)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2021.v25i2.1429

Abstract

Increasing customer awareness of environmental issues, including awareness of the decreasing capacity of landfills for final disposal, requires industries puts more thought into the reverse logistics (RL) process. Implementing this process requires an in-depth study, especially on barriers to implementing an effective RL system. Based on these problems, this study aims to analyze the RL system's barriers, especially in Indonesian construction machinery remanufacturing companies. In general, the barriers to implementing an effective RL system are categorized as internal and external barriers. Data gathering was carried out to identify internal and external barriers to implementing an effective RL system in construction machinery remanufacturing companies. This step was carried out through literature studies, interviews with academics and practitioners in the field of RL systems, and distributing questionnaires. Furthermore, the Analytical Hierarchy Process (AHP) approach ranks the barriers to implementing the RL system, which is a priority for construction machinery remanufacturing companies. This research contributes to a compilation of RL system barriers, especially in the construction machinery remanufacturing industry. The result analysis using AHP showed that the priority score of criteria activity front-end is the biggest.
Student Attendance System Prototype With IoT-Based on Fingerprint and Temperature Sensors in New Normal Era of COVID-19 Pandemic Simatupang, Joni Welman; Qurais Shihab, Rizky Aryan
Jurnal IPTEK Vol 26, No 2 (2022)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2022.v26i2.3000

Abstract

SourceURL:file:///home/nfrozi/itats/ejurnal/iptek/3000-10559-1-ED.docxCurrently, we are entering the new normal era of the COVID-19 pandemic. Attendance activities can be one of the media for spreading COVID-19. Manual attendance activities make people gather in one place. Manual attendance activities also take a long time. By utilizing internet technology, this research combines body temperature measurement with the internet of things (IoT) based and is equipped with a hand sanitizer. The results of attendance data will be displayed on the web server. This device is made using ESP8266, MLX90164 temperature sensor, fingerprint sensor, IR sensor, pump motor, MB-102 power supply module, and buzzer. The tested device requires only input to activate three sensors (one integrity). As a result, this research succeeded in making the device able to work very well. The device can read body temperature with an average accuracy of 97.55–99.67% with the K3S Infrared Digital Pool Thermometer as a comparison. This device is designed to only take three seconds to clean hands compared to washing hands with soap and running water. The web server design works well too.
Implementation of the Islamic Form Concept in the Main Building of the Islamic Center Area in Sidoarjo City Rozi, M. Fatchur; Widjajanti, Wiwik Widyo; Ratniarsih, Ika
Jurnal IPTEK Vol 29, No 1 (2025)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2025.v29i1.6714

Abstract

Islamic Center in Sidoarjo City is a building area that aims to facilitate the growth and development of Islam in Sidoarjo City. This is due to the absence of facilities that provide for Islamic religious activities. With the existence of this building area, it is expected to be able to accommodate scholars and Muslims to develop and maintain the values of Islam. Through the application of the Islamic Architecture theme, the buildings in this area apply the concept of Islamic Geometry to the form of the building with the aim of creating a form of Islamic architecture that is able to express the characteristics of Islamic architecture. The concept of Islamic geometry in the form of architecture will focus on creating an attractive, charming design that has deep meaning. Islamic Geometry Design can include various elements that make the building an attractive and inviting sight. The concept of this form must create an eye-catching form for people towards the surrounding environment, so that the existing building form is able to respond to the conditions of the surrounding environment.
De Stijl Style Board Design Of Waste Processing Of HDPE and LDPE Plastic Bags Adiani, Ningroom -; Fitri, Andina Rizky
Jurnal IPTEK Vol 26, No 1 (2022)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2022.v26i1.2951

Abstract

The classification of plastic bag waste made from HDPE and LDPE is based on colour obtained white and black in dominant quantities in addition to red, blue, yellow, and others. Through the experimental method, heating on a gas stove at a temperature of 40-700C can melt the plastic bag waste. Heating is done to meet the trash so that it can be manually moulded into various geometric shapes. Selection of the optimal shape and size of the mould is needed to realize the geometric board shape. De Stijl's style in Piet Mondrian's 2D work is used as the basis for composing the printed composition. The design method is used to realize the arrangement into a geometric board shape with a colour composition in De Stijl's modernism style. The boards will be resin reinforced by the FRP method. The board is used to make stool products, pegboards and corner tables.
Characteristic and Provenance of Talang Akar Formation Sandstone, Sukamoro Area, South Sumatera Rochmana, Yogie Zulkurnia; Idarwati, Idarwati; Harnani, Harnani; Mayasari, Elisabet Dwi
Jurnal IPTEK Vol 27, No 1 (2023)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2023.v27i1.4434

Abstract

Sukamoro area, Banyuasin Regency, South Sumatera, was the research location. This investigation focuses on the origin of sandstones from the Talang Akar Formation. In the area of investigation, sandstones are widely dispersed and exhibit a variety of properties. Due to the abundance of sandstones found and their high resistance and physical compactness, an analysis of the original rock can be carried out. Generally, the material that makes up sandstone comes from the previous rock. This investigation was undertaken using a descriptive-analytical methodology to determine the origin of the rock. The collected surface data is subsequently petrographically examined. After determining the composition of the constituent minerals, a provenance analysis was conducted to determine that the Talang Akar Formation's sandstones originated from the Magmatic Arc. Furthermore, the Talang Akar sandstone reveals the origin of the Recycle Orogen. Thus, it is considered that the sandstones of the Talang Akar Formation have seen many uplift episodes as a result of tectonic activity, almost to the point where they have experienced an increase in the maturity or stability of their continental block provenances
Application of Symbolic Architecture to The Design of The Fashion Carnaval Cultural Activity Center in The Jember City Nurshella, Febriany; Widjajanti, Wiwik Widyo; Nareswarananindya, Nareswarananindya
Jurnal IPTEK Vol 25, No 2 (2021)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2021.v25i2.2337

Abstract

Jember is one of cities in East Java which has been very famous in the world. This city is dubbed as a carnaval city because it organizes an annual festival namely “Jember Fashion Carnaval (JFC)”. It is a fashion carnaval that presents the creativity of Indonesian artists. This sort of event has so famed that many foreign visitors come and see. Jember Fashion Carnaval has become a great event of entertainment and tourism that make Jember and even Indonesian people proud of. Moreover, this event exhibits cultural and art fashion show in the international level. Unfortunately, a specific place which can accommodate this kind of activity has not been available yet. As a result, JFC and art show are paraded along the roads in Jember. Thus, a Cultural Activity Centre of Fashion Carnaval in Jember is necessary to be designed by employing symbolic architecture. To collect the data, the researcher implemented field study and literature study as well as descriptive analysis method. The macro concept of this design entitled iconic under the symbolic theme will make Jember as a Carnival city. Meanwhile, the micro concept of recreational land order is actualized in centered-circulation pattern getting the philosophy of JFC logo. The micro concept of adaptive shape occurs by adapting the shape of JFC symbol as the costume of building, whereas the micro concept of thematic space derives from the philosophy of JFC fashion products which have different themes for every event. The facilities provide show area, convention hall, organizer office, restaurant and inn, training and workshop, art gallery, and souvenir shop. They are designed to facilitate all activities related to JFC. Accordingly, this design is expected to be an area which can support JFC event for youths who want to develop and continue the art works produced by Indonesian people so that this event can last long and improve other subsequent events.
Implementation of the Zachman Framework in the Digital Sales System in Selotapak Permai Trawas Small and Medium Industries Handani, Felix
Jurnal IPTEK Vol 26, No 2 (2022)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2022.v26i2.3719

Abstract

Small and Medium Enterprise (SMEs) is a community of citizens bringing together entrepreneurs within the scope of small-scale businesses. In SMEs, internal management is spontaneous and generally does not have standardized procedures. The use and utilization of technology can accelerate the growth of procedures that occur in a small industry, but not all of them are successful. Human resource management factors and a culture that has existed for many years shape the uniqueness of its procedures and management. Using the Zachman Framework in the software development process helps analyze needs to obtain concrete requirements according to conditions in the field. Program development using the Software Development Life Cycle by designing, implementing, testing, and validating to users. From the testing and validation results conducting interviews and observations, 15% of community members joined and used the application. With the Zachman Framework, this maturity can be measured properly thereby improving management
Implementation of Hot Code Update in Hybrid Mobile Development Using Dynamic Bundle Loading Arhandi, Putra Prima; Putri, Ika Kusumaning; Zaka, Muhammad Nindra
Jurnal IPTEK Vol 26, No 2 (2022)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2022.v26i2.2372

Abstract

Setiap kali developer akan merilis update pada aplikasi mobile, update tersebut akan ditinjau terlebih dahulu oleh marketplace. Sehingga membutuhkan waktu tambahan agar update tersebut bisa sampai ke user. Lamanya proses peninjauan ini bisa menjadi masalah apabila ada perbaikan pada fitur aplikasi yang harus segera diterima oleh user. Sehingga dibutuhkan cara agar user dapat menerima update pada aplikasi mobile tanpa harus menunggu tinjauan dari marketplace. Hot code update merupakan metode yang dapat menambahkan dan memperbaiki fitur pada aplikasi tanpa perlu ditinjau terlebih dahulu oleh marketplace. Dynamic Bundle Loading merupakan salah satu penerapan dari metode hot code update yang dapat diimplementasikan pada hybrid mobile development. Developer akan mengunggah source code javascript terbaru ke server dalam bentuk bundle. Kemudian aplikasi akan mengunduh dan menerapkan fitur - fitur yang ada pada bundle tersebut. Pada penelitian ini akan dibuat sistem untuk menerapkan hot code update menggunakan dynamic bundle loading pada hybrid mobile development menggunakan framework react native.  Hasil dari penelitian menunjukkan bahwa metode hot code update dapat merilis update kepada user dengan lebih cepat daripada mengunggah update melalui google play store  dengan selisih waktu 4 jam 39 menit 54 detik. Selain itu, ukuran file update yang harus diunduh oleh user lebih kecil apabila menggunakan metode hot code update dengan selisih 6.1 MB
Effectiveness of Reducing Ammonia Levels in Hospital Wastewater Using A Combination of Bagasse Bio Adsorbent and Nanofiltration Membrane Lestari, Laily Noor Fitri; Nasir, Subriyer; Komariah, Leily Nurul
Jurnal IPTEK Vol 29, No 1 (2025)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2025.v29i1.7691

Abstract

The increasing environmental impact caused by hospital wastewater, particularly due to its ammonia content, necessitates innovative treatment methods. This study investigates the effectiveness of a combination of sugarcane bagasse-based activated carbon bio-adsorbent and nanofiltration membrane technology to reduce ammonia concentrations in hospital wastewater. The activated carbon was produced through carbonization at 550°C and chemical activation using 10% H2SO4. Adsorption experiments were conducted by varying bed heights (5, 7.5, and 10 cm) and flow rates (2, 3, and 4 L/min), followed by nanofiltration at 25, 30, and 35 Psi pressures. Results showed that the combined treatment reduced the wastewater pH from 9.08 to 6.53 and ammonia concentration from 4.61 mg/L to 0.02 mg/L, successfully meeting regulatory standards. This indicates that the integrated method effectively decreases ammonia levels and improves wastewater quality before discharge.

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