SPECTA Journal of Technology https://journal.itk.ac.id/index.php/sjt <p align="justify">SPECTA Journal of Technology is published by Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM), Institut Teknologi Kalimantan, Balikpapann Indonesia. SPECTA SPECTA Journal of Technology is an open-access peer-reviewed journal that mediates the dissemination of academicians, researchers, and practitioners in the field of Engineering, Technology, and Applied Mathematics. SPECTA Journal of Technology accepts submissions from all over the world, especially from Indonesia. The aims are to provide a forum for national and international academicians, researchers, and practitioners in the broad engineering and technology field to publish the original articles. Accepted articles will be published and will be freely available to all readers with worldwide visibility and coverage. The scope of SPECTA Journal of Technology is the specific topics, issues in various engineering and technology fields above. All articles submitted to this journal can be written in Bahasa Indonesia and English Language.</p> en-US <p>Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a <a href="https://creativecommons.org/licenses/by-nd/4.0/">Attribution-NoDerivs 4.0 Generic(CC BY-ND 4.0)</a> that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.</p> spectajournal@itk.ac.id (Specta Journal) lppm@itk.ac.id (LPPM ITK) Sun, 31 Dec 2023 05:43:25 +0800 OJS http://blogs.law.harvard.edu/tech/rss 60 Analisa Performansi menggunakan Metode Power Link Budget pada Jaringan FTTH Perumahan Balikpapan Regency Cluster Castaric https://journal.itk.ac.id/index.php/sjt/article/view/664 <p>According to research conducted by Telkom, Telkom has experienced the addition of Indihome users up to 1.01 million users. So the total number of Indihome subscribers reached 8.02 million. The increasing demand for Indihome subscriptions and also the farther the customer's location will be to reach, the longer the Fiber Optic cable used, it is necessary to do a network analysis in that area in order to determine the performance of the fiber optic network to the customer's residence. Furthermore, it is necessary to do a network analysis in that area in order to know the performance of the fiber optic network to the customer's residence. The analysis was carried out after processing the data using the method. The calculation method used is the power link budget. The power link budget determines the distance and number of connections that affect the attenuation of the indihome fiber optic network in the Balikpapan Regency Cluster Castarica Housing Complex. And the conclusion obtained is that the FTTH network in Balikpapan Regency Cluster Castarica can be categorized as feasible for the maximum total attenuation on the network of 27.92009 dB and the customer's farthest distance from OLT/STO is 7.0574 Km which is in accordance with the standard set by ITU-T G.984 as well as the regulations set by PT. Telkom</p> Ifandi Rahmad Riswanto, Mohammad Iqbal Ditrinov, Amalia Rizqi Utami Copyright (c) 2023 Amalia Rizqi Utami https://creativecommons.org/licenses/by-nd/4.0 https://journal.itk.ac.id/index.php/sjt/article/view/664 Sun, 31 Dec 2023 00:00:00 +0800 Perancangan Kebijakan Sistem Ketenagalistrikan Kawasan Institut Teknologi Kalimantan https://journal.itk.ac.id/index.php/sjt/article/view/633 <p>The Kalimantan Institute of Technology (ITK) already has 17 study programs and 3002 active students until 2021 and is projected to have 20 study programs by 2025. However, geographical location of ITK affect ITK facilities readiness that later supporting tridharma activities to be carried out perfectly. The Mechanical, Electrical and Plumbing System (MEP) at the ITK Campus needs to be designed with a sustainable design in order to accommodate the needs of electricity, sound, air conditioning, clean water, and dirty water on the ITK Campus until 2025. This study aims to design a sustainable MEP design for distribution of electricity especially in lightning protection in order to meet the characteristics of safe, reliable and appropriate design. The stages involved include 8 (eight) processes, namely: 1) data collection and design of the existing MEP, 2) projecting the growth of the academic community and equipment needs until 2025, 3) reviewing the existing MEP system as the existing protection system, 4) calculation of the suitability of the existing MEP system based on projected needs, SNI and SPLN, 5) planning for improvement of existing systems and plans for developing MEP systems, 6) making working drawings of the MEP system, 7) drafting Bill of Quantity MEP, and 8) MEP budgeting. This research is expected to produce output in the form of MEP planning drawings that are recommendation of detailed engineering design which are documented in strategic policies through the rector's regulation. This research is aimed to be used as a reference for MEP design for ITK development in the future development.</p> Happy Aprillia, alfian djafar, Firilia Filiana Copyright (c) 2023 081347087013 Aprillia, alfian djafar, Firilia Filiana https://creativecommons.org/licenses/by-nd/4.0 https://journal.itk.ac.id/index.php/sjt/article/view/633 Sun, 31 Dec 2023 00:00:00 +0800 Pengaruh Tingkat Kekristalan Material Grafena Oksida Tereduksi Terhadap Nilai Kuat Tekan Beton Normal https://journal.itk.ac.id/index.php/sjt/article/view/947 <p>Reduced graphene oxide (rGO) phase from coconut shell charcoal through heating using either a furnace or an artificial burner has been successfully formed. Heating was carried out through 2 temperature variations, namely 500 and 1000ᵒC, with a holding time of 5 hours. Heating through an artificial burner is carried out using used fuel oil equipped with a thermostat to measure the temperature. Phase identification was carried out using Xrays Diffraction Spectroscopy (XRD) testing with an angle of 2θ, namely 15-50ᵒ. The diffraction pattern shows that all samples have rGO phases with different intensity values. The higher the temperature, the greater the intensity value compared to the other samples. This intensity value indicates an increase in the sample's crystallinity due to an increase in temperature.</p> umi nuraini, Rahayu Pradita, Qurrotus Shofiyah, Mohammad Dani Al Qori , dedi Copyright (c) 2023 umi nuraini, Rahayu Pradita, Qurrotus Shofiyah, Mohammad Dani Al Qori , dedi https://creativecommons.org/licenses/by-nd/4.0 https://journal.itk.ac.id/index.php/sjt/article/view/947 Sun, 31 Dec 2023 00:00:00 +0800 Optimasi Algoritme Xtreme Gradient Boosting (XGBoost) pada Harga Saham PT. United Tractors Tbk. https://journal.itk.ac.id/index.php/sjt/article/view/1031 <p>The issue of a recession in 2023 continues to increase, affecting the rise and fall of the stock price index. From <br />2015 to 2023 the share price of PT. United Tractors Tbk. experiencing fluctuations. The method used to determine <br />fluctuations in PT. United Tractors Tbk. share data is an ensemble learning. One of the ensemble learning <br />algorithms that is popular and often used for prediction or classification problems is Extreme Gradient Boosting <br />(XGBoost). The aim of this research is to obtain the best model ofPT. United Tractors share prices using XGBoost. <br />XGBoost is a development of Gradient Boosting which has the advantage of faster implementation. The data used <br />is the share price of PT. United Tractors Tbk. from March 16 2021 to March 31, 2023. This research uses four <br />technical indicators in analyzing share price movements, namely Exponential Moving Average (EMA), Simple <br />Moving Average (SMA), Relative Strength Index (RSI) and Moving Average Convergence /Divergence (MACD). <br />This experiment produced a MAPE value of 3.89%, which shows the optimization of the XGBoost algorithm on <br />PT share prices. United Tractor Tbk. produces accurate models.</p> Tiyas Astutiningsih, Dewi Retno Sari Saputro, Sutanto Copyright (c) 2023 Tiyas Astutiningsih https://creativecommons.org/licenses/by-nd/4.0 https://journal.itk.ac.id/index.php/sjt/article/view/1031 Sun, 31 Dec 2023 00:00:00 +0800 Kontrol Penggunaan Air Bersih Perumda Tirta Manuntung Balikpapan dengan Multivariat Exponentially Weighted Moving Avarage https://journal.itk.ac.id/index.php/sjt/article/view/1032 <p><em><span style="font-weight: 400;">Perumda Tirta Manuntung Balikpapan merupakan perusahaan daerah yang didirikan untuk menjamin pemerataan dan keseimbangan pelayanan air minum untuk kebutuhan masyarakat dan usaha lainnya. Dalam proses distribusi Perumda Tirta Manuntung Balikpapan memerlukan kontrol pengendalian yang akan membantu proses pemerataan distribusi. Dengan mengambil studi kasus pelanggan air minum dikawasan MT. Haryono Balikpapan periode Januari – Desember 2022. Diagram kontrol yang paling optimal untuk data distribusi air minum Perumda Tirta Manuntung Balikpapan adalah multivariat exponentially weighted moving average (MEWMA) karena diagram kontrol ini sangat sensitif terhadap pegeseran kecil rata-rata proses dari suatu variabel yang berdistribusi normal multivariat, sehingga dari diagram kontrol tersebut didapatkan Batas kendali atas (UCL) sebesar 22.8 dan batas kendali bawah (LCL) sebesar 0. Selain itu, data distribusi penggunaan air yang memiliki jumlah out-of-control terendah terjadi pada bulan April dengan jumlah 4 pengamatan yang memiliki nilai </span></em><span style="font-weight: 400;"> T</span><span style="font-weight: 400;">i </span><span style="font-weight: 400;">2</span><em><span style="font-weight: 400;">&nbsp; out-of-control dan yang memiliki jumlah out-of-control tertinggi dikawasan tersebut terjadi pada bulan September dengan jumlah 94 pengamatan yang memiliki nilai </span></em><span style="font-weight: 400;"> T</span><span style="font-weight: 400;">i </span><span style="font-weight: 400;">2</span><em><span style="font-weight: 400;">&nbsp; out-of-control</span></em></p> Aditya Putra Pratama, Meisy Angelita Copyright (c) 2023 Aditya Putra Pratama https://creativecommons.org/licenses/by-nd/4.0 https://journal.itk.ac.id/index.php/sjt/article/view/1032 Sun, 31 Dec 2023 00:00:00 +0800 Penilaian Bisnis dan Prediksi Kebangkrutan Perusahaan: Studi pada Emiten Yang Listing pada Papan Akselerasi Bursa Efek Indonesia https://journal.itk.ac.id/index.php/sjt/article/view/1022 <p>Business valuation is one of the fundamental aspecs that must be done in making investment decisions and to <br />evaluate company performance. The risk of bankruptcy is a risk that always exists in business, so it is important <br />to mitigate. This research try to determine the value of the company using financial ratio analysis, which consists <br />of liquidity, solvency, activity, and profitability ratios. Furthermore, bankruptcy prediction analysis is also carried <br />out to determine the possibility of the company experiencing bankruptcy. we observed two companies in the <br />transportation and logistics sector that are listed on the acceleration board, PT. Prima Globalindo Logistik, Tbk <br />(Ticker Code: PPGL) and PT. Utama Radar Cahaya, Tbk (Ticker Code: RCCC). The results show that two <br />companies have good financial ratios and a low risk of bankruptcy</p> Agung Prabowo, Deli Yansyah Copyright (c) 2023 Agung Prabowo https://creativecommons.org/licenses/by-nd/4.0 https://journal.itk.ac.id/index.php/sjt/article/view/1022 Sun, 31 Dec 2023 00:00:00 +0800 Analisis Kualitas Website Rumah Sakit Umum Daerah Beriman Balikpapan Menggunakan Metode Webqual 4.0 dan Importance-Performance Analysis (IPA) https://journal.itk.ac.id/index.php/sjt/article/view/1025 <p>RSUD Beriman Balikpapan uses a website to introduce its facilities and services. However, there are several problems on the RSUD Beriman Balikpapan website, such as a lack of clarity in interactions and difficulty understanding the website, unclear directions, pages without content, less detailed information, and minimal interaction between users and the organization. Apart from that, an assessment of the quality of the website has never been carried out by the Beriman Balikpapan Regional Hospital. Based on these problems, it is necessary to analyze the quality of RSUD Beriman Balikpapan's website using the Webqual method and IPA (Importance-Performance Analysis) analysis. The assessment aims to increase the problem visibility to the stakeholders to improve the quality of the website. The instruments used in this research come from the Webqual 4.0 method, which includes three main dimensions: usability, information quality, and service interaction quality. The analysis technique applied is Importance-Performance Analysis (IPA), which will provide an overview of indicators that require improvement or need to be maintained based on the difference between perceived performance and user expectations. The results of the Webqual Index (WQI) calculation show an average value of 0.79, indicating that overall, the quality of the RSUD Beriman Balikpapan website is relatively good. Hypothesis testing shows significant differences between perceived performance and user expectations in all dimensions. The gap analysis produces an average gap value of -0.37. From the Importance-Performance Analysis, several indicators need to be considered for improvement. These indicators are related to the ease of navigation and use of the RSUD Beriman Balikpapan website, the provision of always up-to-date information, and services that align with the expectations promised on the RSUD Beriman Balikpapan website</p> Sri Rahayu Natasia, Vika Fitratunanny Insanittaqwa, Adil Al Hafid Copyright (c) 2023 Sri Rahayu Natasia https://creativecommons.org/licenses/by-nd/4.0 https://journal.itk.ac.id/index.php/sjt/article/view/1025 Sun, 31 Dec 2023 00:00:00 +0800 Analisis Peramalan Inflasi Di Kota Balikpapan Menggunakan Metode ARIMA https://journal.itk.ac.id/index.php/sjt/article/view/1026 <p>Uncontrolled inflation is one of the problems in a country's economy. This is because inflation is used as a reference for monetary policy. However, controlling the inflation rate is relatively difficult to do. Therefore, an accurate inflation rate forecast is needed so that it can predict future inflation. This research aims to predict future inflation using the ARIMA method. The data used in this research is inflation in Balikpapan City from January 2016 to December 2022. From the analysis results, the best ARIMA method for predicting inflation in Balikpapan City is ARIMA([1,2,12],0,[6]) which has an RMSE value of 0.22886. Further research that can be carried out to improve the accuracy of Balikpapan City inflation forecasting is the use of combined methods or adding independent variables that are able to explain Balikpapan City inflation in the future.</p> Gebryani Rante Lembang, Mega Silfiani, Irma Fitria Copyright (c) 2023 Irma Fitria https://creativecommons.org/licenses/by-nd/4.0 https://journal.itk.ac.id/index.php/sjt/article/view/1026 Sun, 31 Dec 2023 00:00:00 +0800 The Impact of Increasing Sigma Value on the Performance of the Weapon Production Line at PT. X https://journal.itk.ac.id/index.php/sjt/article/view/907 <p>PT X is one of the companies that produces the Main Armament System (Alutsista) used by the Indonesian National Army. In an effort to meet the production needs of Assault rifle weapons, PT. X must meet the quality standards set by the Ministry of Defense to support the operational tasks of the Indonesian National Army. This study aims to improve the performance of the weapon production line by measuring and evaluating the amount of sigma value in long-barreled weapons. The method used in this research is DMAIC (Define, Measure, Analyze, Improve, and Control), which is a structured approach to quality improvement. This method is used to address problems that occur on the weapon production line and analyze improvements that can be made to improve production performance. The steps recommended in this study include using the Critical to Quality method to identify the causes of problems that occur in weapon production. Furthermore, the Cause and Effect method is used to rank the most significant causes of problems based on the scores obtained. The 5W+1H method is also used to formulate appropriate improvement proposals based on the ranking results from the Cause and Effect Matrix. Thus, it is expected that an effective improvement proposal can be found to improve the performance of PT. X weapon production line.</p> Fatmawati Fatmawati, Aries Sudiarso, Juprianto, Vicky Aditiyo Nugroh, Andini Aprilia Ardhana, Rudy AG Gultom Copyright (c) 2023 Fatmawati Fatmawati, Aries Sudiarso, Juprianto, Vicky Aditiyo Nugroh, Andini Aprilia Ardhana, Rudy AG Gultom https://creativecommons.org/licenses/by-nd/4.0 https://journal.itk.ac.id/index.php/sjt/article/view/907 Sun, 31 Dec 2023 00:00:00 +0800 Perencanaan Kapasitas dan Waktu Produksi Tahu di Rumah Produksi Bapak Rahim, Sentra Industri Kecil Somber Balikpapan https://journal.itk.ac.id/index.php/sjt/article/view/1005 <p>The Somber Small Industry Center's Regional Technical Implementation Unit (UPTD) is one of Balikpapan's tofu and tempeh industrial sectors. Based on observations performed throughout the implementation of tofu production at Mr. Rahim's production house, it is known that the production capacity of tofu varies every month due to the shortage of a tofu production plan, resulting in Mr. Rahim's production house losing 816 kg worth Rp. 20.400.000 in 2022. The purpose of this study was to plan and offer recommendations for tofu manufacturing capacity and time that are suitable for Mr. Rahim's production house. Forecasting moving averages, weight moving averages, exponential smoothing, and linear trend line models are applied in the tofu production planning approach. The research results in capacity planning and production time of tofu using the forecasting method of moving average over 3 periods and 6 periods, respectively, 6081 kg/month and 6025 kg/month; weight moving average over 3 periods and 2 periods, respectively, 5792 kg/month and 5504 kg/month; exponential smoothing method with alpha 0.80, 0.90, and 0.95, respectively, 5258 kg/month, 5080 kg/month, and 4990 kg/month; and the linear trend line model method of 6317 kg/month. The conclusion of this study using the best feasible forecasting method is the weight moving average with two weighting periods, with a total required capacity of tofu production time of 1671.0144 hours/year and a total capacity of available tofu production time of 1874.6112 hours/year due to the difference in actual demand with a forecast of 732 kg, which does not exceed the value of lost sales in 2022.</p> Aditya Permana, Budiani Fitria Endrawati, Faishal Arham Pratikno Copyright (c) 2023 Budiani Fitria Endrawati, Aditya Permana, Faishal Arham Pratikno https://creativecommons.org/licenses/by-nd/4.0 https://journal.itk.ac.id/index.php/sjt/article/view/1005 Sun, 31 Dec 2023 00:00:00 +0800 Garbage Bank Transaction Processing Information System https://journal.itk.ac.id/index.php/sjt/article/view/798 <p><em>Waste bank is a solution in waste management in Indonesia. The existence of this waste bank program can change people's minds to be more concerned about useless waste and goods that have value and price. Through the waste bank program, people can store waste and the waste can be exchanged for money that can be saved. However, in the management of the waste bank there are several problems, such as the community does not know information about becoming a customer or how to open a waste bank account, people who are already customers do not know the amount of their waste bank savings, because the system uses bookkeeping, customers do not know what type of waste price is set by the waste bank, and the waste bank manager still uses books for recording, can cause data loss, delays in processing data, so it is inefficient. Therefore we need a system to overcome this problem, namely by creating a waste bank processing information system. This system uses the waterfall model as a software development model and uses blackbox testing for testing.</em></p> Agustiena Merdekawati -, Azis Sukma Dhiana Copyright (c) 2023 Agustiena Merdekawati https://creativecommons.org/licenses/by-nd/4.0 https://journal.itk.ac.id/index.php/sjt/article/view/798 Sun, 31 Dec 2023 00:00:00 +0800 Pola Spasial Kejahatan Pencurian Berdasarkan Aspek Temporal di Kecamatan Kadia Kota Kendari https://journal.itk.ac.id/index.php/sjt/article/view/1033 <p><em>Kecamatan Kadia saat ini masuk ke dalam kecamatan yang rawan terjadi kejahatan di Kota Kendari berdasarkan data dari Polres Kendari tahun 2023. Penelitian ini bertujuan untuk menjelaskan pola spasial kejahatan yang terjadi berdasarkan aspek temporal terjadinya kejahatan sehingga dapat mengetahui karakteristik kejahatan di setiap dimensi waktu di Kecamatan Kadia agar memudahkan pencegahan terhadap kriminalitas serta mengidentifikasi daerah yang rawan terjadi pencurian di Kecamatan Kadia, mengingat keterbatasan personil kepolisian yang tidak memungkinkan untuk melakukan pengawasan di seluruh kawasan di Kecamatan Kadia. Penelitian ini menggunakan pendekatan kuantitatif kualitatif dengan metode analisis berupa Nearest Neighborhod Analysis untuk melihat pola kejahatan pencurian yang terbentuk, selain itu metode Kernel Density juga digunakan untuk melihat kawasan yang rawan terjadi pencurian berdasarkan lokasi kejadian. Dari penelitian ini diketahui bahwa kejahatan di malam hari sampai dini hari memiliki pola kejahatan yang cenderung acak (random) dengan kawasan permukiman penduduk menjadi kawasan yang cenderung rawan terjadi kejahatan pencurian sedangkan kejahatan pencurian pada pagi hari sampai sore hari memiliki kecendrungan pola menyebar (dispersed) dengan kecendrungan terjadi di kawasan komersial dan permukiman penduduk. </em></p> Muhammad Ilham, Bambang Hari Wibisono Copyright (c) 2023 Muhammad Ilham, Bambang Hari Wibisono https://creativecommons.org/licenses/by-nd/4.0 https://journal.itk.ac.id/index.php/sjt/article/view/1033 Sun, 31 Dec 2023 00:00:00 +0800 Effect of Aeration Treatment and Ore Size on Gold Percent Extraction with Agitation Leach Test Method https://journal.itk.ac.id/index.php/sjt/article/view/825 <p>Generally, gold processing in the world is carried out through a <em>leaching</em> process to extract its gold content. One of the techniques commonly used in melindi gold ore, especially those with low grades, is the <em>heap leaching</em> method. One of the companies that manages gold with this technique is PT J Resources Bolaang Mongondow. In the <em>heap leaching</em> process at PT J Resources Bolaang Mongondow, there are several parameters that determine the final result of this process, including the concentration of dissolved oxygen and the size of the ore. This study aims to see the effect of aeration and ore size on percent gold extraction through the principle of <em>leaching</em> with the agitation leach test. This study used gold oxide ores with sizes of +6 and -6 mm. The two measures were each subjected to aeration and non-aeration <em>treatment</em> in the <em>leaching</em> process for 48 hours. From the results of experiments that have been carried out, it was found that the highest percent of extraction was produced at a size of +6 mm with a non-aeration <em>treatment</em> of 90%. While at a size of -6 mm, the highest percentage of extraction was obtained in aeration <em>treatment</em> of 84%. After data analysis, it was found that these results are highly dependent on oxygen levels and <em>base metal</em> content in the <em>leaching</em> process.</p> Arief Rakhman Hakim Arief, Tri Wahyuningsih, Ravi'i, Yogi Gautama Yanas, Fahrul Rozzi Usman Copyright (c) 2023 Arief Rakhman Hakim Arief, Tri Wahyuningsih, Ravi'i, Yogi Gautama Yanas, Fahrul Rozzi Usman https://creativecommons.org/licenses/by-nd/4.0 https://journal.itk.ac.id/index.php/sjt/article/view/825 Sun, 31 Dec 2023 00:00:00 +0800