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Kab. aceh selatan,
Aceh
INDONESIA
Jurnal Inotera
Published by Politeknik Aceh Selatan
ISSN : 25487574     EISSN : 25811274     DOI : -
Core Subject : Science, Engineering,
Computer Science & IT Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
Arjuna Subject : -
Articles 301 Documents
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Centrifugal Pump Shaft Coupling Durability Material S45C in the Water Treatment Plant Unit with the Destructive Test Method (impact) Fransnazoan Sitorus; Muhammad Fajar Lubis; Nuzuli Fitriadi
Jurnal Inotera Vol. 8 No. 1 (2023): January-June 2023
Publisher : LPPM Politeknik Aceh Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31572/inotera.Vol8.Iss1.2023.ID237

Abstract

The peg is a component that functions as a binder between the shaft and the hub in transmitting power and rotation. In general, the pegs are designed and made using metal materials such as mild carbon steel. In this research, the material of the coupling pin design on the centrifugal pump shaft is S45C. Where on the sample of the designed post, an impact test or the Charpy method of hitting the notch is carried out which aims to determine the amount of resistance to sudden loading and to determine the physical changes (failure modes) experienced by the post material. In this study, the sample of the post with dimensions of 6.10 mm x 6.10 mm x 55 mm obtained a large impact strength (impact strength) in the Charpy method impact test of 0.8445 Joule/mm2. And for the physical change (failure mode) experienced by the post material against the sudden loading, it is a brittle fracture that is characterized by physical characteristics in the form of granular (like sand) on the fracture surface, and the absence of plastic deformation that occurred first.
Transient Numerical Study to Determine the Effect of Inlet Angle Variation on Flow Conditions inside a Circular Aquaculture Tank Ahmad Wali El-Haq; Ryan Anugrah Putra
Jurnal Inotera Vol. 8 No. 1 (2023): January-June 2023
Publisher : LPPM Politeknik Aceh Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31572/inotera.Vol8.Iss1.2023.ID239

Abstract

Seeing how great the contribution and potential of the aquaculture sector to the fulfillment of food for the people of Indonesia, the development of aquaculture including the Recirculating Aquaculture System (RAS) is very important to be carried out intensively. An important aspect that should be considered for the development of RAS is maintaining water quality as the main medium of cultivation. Optimization of the aquaculture tank is an effort that can be conducted to achieve this goal. A transient numerical study to determine the effect of inlet angle variation on flow conditions inside a circular aquaculture tank was conducted to assess the optimum geometry for the application. Single-phase CFD simulations using the k-ω SST turbulent model were carried out to evaluate the effect of inlet nozzle angle variations. Three angle variations 0°, 45°, and 90° were selected and the resultant fluid flow conditions were analyzed. From the CFD results, it can be known that the optimum condition for the circular aquaculture tank is achieved for the angle 0° among the tested angle in this present study.
Maintenance Analysis of Ripple Mill Machine Using PERT Method at PT Ujong Neubok Dalam Aulia Perlijar; Masykur
Jurnal Inotera Vol. 8 No. 1 (2023): January-June 2023
Publisher : LPPM Politeknik Aceh Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31572/inotera.Vol8.Iss1.2023.ID240

Abstract

The purpose of this research is to control time and to anticipate the completion time of maintenance so that it is not late at PT Ujong Neubok Dalam (UND), and also to improve the implementation of maintenance both as cleaning, lubrication and as periodic checks. In carrying out its production, the company has various machine variations, one of which is the Ripple mill machine. In carrying out ripple mill machine maintenance using the PERT treatment method. The PERT method , or project evaluation and review technique, is a management science model for project planning and execution. The results showed that scheduling on a ripple mill machine was 23 hours or 95.49 % of the normal time. With a very high duration of performance, the greater the possibility of damage occurring, from the analysis that has been carried out, to minimize the damage that occurs to the ripple mill machine, the thing that must be done is to check the ripple mill machine every hour to ensure that there is no damage that can cause the ripple machine mill stopped working. When repairing a Ripple mill machine there are several components that must be provided such as Lubricants, Bearings, V-belt-SPB 2630Lw, Ripple Plate, Pully B3x5, Space Ring, Rotor axle, and 4mm MH360 Welding Wire. As for the work steps, the maintenance starts with checking the axle rotor and immediately following the other components. This maintenance is carried out every 3 months, except for the Ripple Plate and Pully B3x5, because these 2 components are replaced once every 6 months.
Analysis of The Effect of Variations in Mud Content on Stability and Flow Values in Asphalt Concrete Mixtures Layer Aus (AC-WC) Safridatul Audah; Adrian Kaifah; Sulaiman AR; Meraty Ramadhini
Jurnal Inotera Vol. 8 No. 2 (2023): July - December 2023
Publisher : LPPM Politeknik Aceh Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31572/inotera.Vol8.Iss2.2023.ID232

Abstract

Aggregat mud affect the weakening of asphalt adhesion and bonds between aggregate grains which will cause damage more quickly before reaching the design age, one of which is the formation of holes in the road surface layer.The purpose of this study was to measure the effect of variations in silt content on the stability and flow values ​​of Asphalt-coated concrete mix (AC-WC). All tests were carried out using the Marshall test method and each test object became the basis for calculations to analyze the stability and flow values ​​of the AC-WC asphalt concrete mixture with variations in silt content of 0%, 5%, 10%, 15% and 20%. The optimal bitumen content used is 6.7%. Furthermore, marshall testing was carried out on variations in silt content in the aggregate to obtain stability and flow values, stability values ​​tended to decrease from 1048.64 kg to 798.96 kg, this affected the minimum stability value of ≥ 800 kg and flow values ​​tended to increase from 1.54 mm to 3.05 mm, but the discharge value still meets the required limit of ≥ 3 mm with a mud content of 13%. Based on the results of the ANOVA analysis obtained from the test, the stability value shows a significant decrease in the level of stability and the flow value shows an insignificant effect on the proportion of sludge.
Information System for South Aceh Historical Stories Sukma Achriadi; M. Arinal Ihsan
Jurnal Inotera Vol. 8 No. 2 (2023): July - December 2023
Publisher : LPPM Politeknik Aceh Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31572/inotera.Vol8.Iss2.2023.ID241

Abstract

Making this application aims to create an application that can accommodate historical stories in South Aceh in the form of a reading application that is easily accessible. The making of this application is made with a programming language that is processed into an application that contains historical stories obtained from various sources as well as from narrators or historical storybooks in South Aceh. From the development of this application, a lot of knowledge was gained from historical stories in South Aceh. Making this application produces an application that includes useful and historical stories so that all historical stories in South Aceh are not lost and forgotten and can also be accessed easily by anyone.
Optimization of Geopolymer Compressive Strength Using Response Surface Methodology Cut Rahmawati
Jurnal Inotera Vol. 8 No. 2 (2023): July - December 2023
Publisher : LPPM Politeknik Aceh Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31572/inotera.Vol8.Iss2.2023.ID242

Abstract

Geopolymers have issues related to cracking resistance and pore filling, decreasing their mechanical strength. However, the addition of nanosilica and Cellulose Nanocrystals (CNCs) has been found to enhance their mechanical properties. This study focused on optimizing the utilization of nanosilica and CNCs to enhance the compressive strength of geopolymers. This research employed Response Surface Methodology (RSM) with Central Composite Design (CCD). The concentrations of nanosilica and CNCs used in the experiments ranged from 2% to 4% and 1% to 3%, respectively. The experimental results consist of 13 runs, including 5 center point runs. The model suggested concentrations of nanosilica and CNCs of 3.98% and 1%, respectively, for an optimal compressive strength of 22.20 MPa. The proposed quadratic model exhibited high accuracy, as evidenced by an R2 of 0.9865, Adj- R2 of 0.9769, and predicted R2 of 0.9168. The closeness of R2 to 1 indicates a strong correlation between the actual and predicted values, thus highlighting the model's significant relevance. Ultimately, the model developed in this study holds the potential for predicting the compressive strength of geopolymers incorporating nanosilica and CNCs.
Comparative Analysis of Soft Pneumatic Actuator Designs for Effective Human Finger Movement: A Study on Continuous and Non-Continuous Chamber Configurations Ritonga, Syahirul Alim; Herianto
Jurnal Inotera Vol. 8 No. 2 (2023): July - December 2023
Publisher : LPPM Politeknik Aceh Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31572/inotera.Vol8.Iss2.2023.ID243

Abstract

Soft actuators show immense potential in various fields, such as wearable medical devices and the rehabilitation of stroke patients. This study aims to design and fabricate a soft pneumatic actuator (SPA) that effectively mimics human finger movements, with specific focus on post-stroke rehabilitation. Two SPA designs, referred to as M1 and M2, were developed and compared. M1 featured segmented chambers to mimic finger joints, while M2 had continuous chambers. The performance of the SPAs was evaluated based on curvature, generated force, and similarity to natural finger movement. Results showed that M1 exhibited superior curvature and achieved greater bending angles compared to M2 at the same pressure levels. This makes M1 well-suited for applications requiring high bending angles such as gripping. Additionally, M2 demonstrated the ability to mimic specific angles associated with picking-like movements. The findings highlight the potential for further research to explore the customization of SPAs for specialized tasks by modifying the number of sections and chambers. In terms of force, M2 generated slightly higher forces than M1, although the difference was not statistically significant. Overall, it is expected that this research contributes to the development of soft actuators and wearable medical devices, particularly in the field of post-stroke rehabilitation.
Influence of Service Quality on Customer Loyalty at BSI KCP Imam Bonjol, Aceh Barat Regency Nur Fajri; Ahmad Arkadius; Sri Hartati; Meri Saputra
Jurnal Inotera Vol. 8 No. 2 (2023): July - December 2023
Publisher : LPPM Politeknik Aceh Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31572/inotera.Vol8.Iss2.2023.ID244

Abstract

This study aims to determine the effect of service quality on customer loyalty at BSI KCP Imam Bonjol Kabupaten Aceh Barat. The dependent variable in this study is customer loyalty while the independent variable is service quality. The data analysis method used in this study uses the classic assumption test including the normality test, multicollinearity test, heteroscedestity test and autocorrelation test. Meanwhile, hypothesis testing includes multiple linear tests, partial t tests and simultaneous F. Based on the results of the study using the Anova test (F test) shows that the sig value <0.05, in other words H0 rejects, means that service quality affects customer loyalty of BSI KCP Imam Bonjol Kabupaten Aceh Barat.
Comparative Analysis of Custom-Designed Soft Pneumatic Actuators for Human Thumb Movement in Post-Stroke Rehabilitation Ritonga, Syahirul Alim; Herianto
Jurnal Inotera Vol. 8 No. 2 (2023): July - December 2023
Publisher : LPPM Politeknik Aceh Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31572/inotera.Vol8.Iss2.2023.ID246

Abstract

One of the most potential applications of soft actuator is as wearable medical devices for post-stroke rehabilitation as a field that requires high levels of safety and adaptability. Incorporating SPAs into such devices can provide a safer and more secure solution, ensuring controlled movements that do not pose a risk to patients. However, there is a research gap regarding the design considerations for soft actuators specifically targeting the human thumb, which exhibits distinct motion patterns compared to the other fingers. This paper addresses this gap by developing and evaluating custom-designed SPAs for the movement of the human thumb, with a focus on post-stroke rehabilitation. Three SPA models (M1, M2, and M3) were proposed, and their performance in replicating the twisting motion of the thumb was assessed. The SPAs were fabricated using 3D printing, and image processing software was utilized for measurement and analysis. The results showed that the M3 model, with two sections of chambers in different axes, exhibited the best performance in generating the desired twisting angle. Integration of the M3 model with four finger-shaped SPAs enabled successful grasping and picking-like movements. This research contributes to the advancement of soft actuators in wearable medical devices, particularly in post-stroke rehabilitation, and holds promise for enhancing patient recovery and quality of life.
Application of Quadratic Programming Using The Beale Method Shanaz Tulzahrah; Syaripuddin; Asmaidi
Jurnal Inotera Vol. 8 No. 2 (2023): July - December 2023
Publisher : LPPM Politeknik Aceh Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31572/inotera.Vol8.Iss2.2023.ID247

Abstract

Portofolio saham merupakan salah satu alternatif bagi investor dalam pengambilan keputusan investasi. Saham portofolio dapat dimodelkan ke dalam model pemrograman kuadratik dengan menggunakan mean variance Markowitz yang dapat diselesaikan dengan menggunakan metode Beale. Penelitian ini bertujuan untuk mencari hasil optimal dari portofolio saham. Data yang digunakan dalam penelitian ini adalah data saham 10 perusahaan yang membagikan dividen terbesar dalam kategori IDX High Dividend 20 untuk tahun 2022. Terdapat dua portofolio saham yang dipilih. Portofolio saham pertama adalah portofolio saham kovarians negatif dengan perbedaan tingkat return ekspektasi yang jauh berbeda, yaitu portofolio saham PT Astra International Tbk dan PT Indo Tambangraya Megah Tbk. Portofolio saham kedua adalah portofolio saham kovarians negatif dengan perbedaan tingkat return ekspektasi yang tidak jauh berbeda yaitu portofolio saham PT Bank Rakyat Indonesia (Persero) Tbk dan PT Mitra Pinasthika Mustika Tbk. Berdasarkan mean variance Markowitz, fungsi tujuan untuk portofolio saham pertama adalah Z=-1,305x_1-9,832x_2-0,137x_1 x_2+0,681x_1^2+2,358x_2^2 dengan batasan x_1+x_2≤100 dan x_1, x_2≥0. Setelah dilakukan perhitungan dengan menggunakan metode Beale, diperoleh tingkat keuntungan yang diharapkan sebesar 3,432% dan risiko sebesar 0,505% dengan proporsi optimal untuk PT Astra International Tbk sebesar 75,063% dan proporsi optimal untuk PT Indo Tambangraya Megah Tbk sebesar 24,937%. Selain itu, fungsi tujuan untuk portofolio saham kedua adalah Z=-2,426x_1-2,528x_2-0,292x_1 x_2+0,366x_1^2+0,508x_2^2 dengan kendala x_1+x_2≤100 dan x_1+x_2≥0. Dengan metode Beale, tingkat keuntungan yang diharapkan sebesar 2. 471% dan risiko sebesar 0,141% dengan proporsi optimal untuk PT Bank Rakyat Indonesia (Persero) Tbk adalah 56,077% dan proporsi optimal untuk PT Mitra Pinasthika Mustika Tbk adalah 43,923%.

Page 15 of 31 | Total Record : 301

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