cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Prof. Dr. Semin
Contact Email
seminits@gmail.com
Phone
+6283856825999
Journal Mail Official
ijmeirjournal@gmail.com
Editorial Address
Department of Marine Engineering, Faculty of Marine Technology, Institut Teknologi Sepuluh Nopember Surabaya Indonesia
Location
Kota surabaya,
Jawa timur
INDONESIA
International Journal of Marine Engineering Innovation and Research
Published by Institut Teknologi Sepuluh Nopember Surabaya
ISSN : 25415972     EISSN : 25481479     DOI : ttp://dx.doi.org/10.12962/j25481479
Core Subject : Science, Social, Engineering,
Automotive Engineering Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Transportation
International Journal of Marine Engineering Innovation and Research (IJMEIR) is an open-access journal, which means that visitors all over the world could publish, read, download, cite and distribute papers published in this journal for free of cost. IJMEIR journal has a vast group of visitors, a far-reaching impact and pretty high citation. IJMEIR adopts a peer-review model, which insured fast publishing and convenient submission. IJMEIR now cordially inviting you to contribute or recommend quality papers to us. This journal is geared towards the dissemination of original innovation, research and practical contributions by both scientists and engineers, from both academia and industry. Theses, dissertations, research papers, and reviews associated with all aspects of marine engineering, marine sciences, and marine technology are all acceptable for publication. International Journal of Marine Engineering Innovation and Research (IJMEIR) focus and scopes are preserve prompt publication of manuscripts that meet the broad-spectrum criteria of scientific excellence. Areas of interest include, but are not limited to: Automotive Biochemical Biology Biomedical science Biophysics and biochemistry Chemical Chemistry Combat Engineering Communication Computer science Construction Energy Energy storage Engineering geology Enterprise Entertainment Environmental Environmental Engineering Science Environmental Risk Assessment Environmental technology Financial Engineering Fire Protection Engineering Fisheries science Fishing Food Science and Technology Health Care & Public Health, Health Safety Health Technologies Industrial Technology Industry Business Informatics Machinery Manufacturing Marine Engineering Marine sciences Marine technology Marine biology Marine economic Marine engines Marine fisheries Marine fuel Marine geology Marine geophysic Marine management Marine oil and gas Marine policy Material sciences Materials science and engineering Mathematics Mechanics Medical Technology Metallurgical Micro-technology Military Ammunition Military Technology Military Technology and equipment Mining Motor Vehicles Naval Engineering Neuroscience Nuclear technology Ocean Robotics and Automation Safety Engineering Sanitary Engineering Space Technology Statistics Traffic Transport Visual Technology
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 1,231 Documents
 120   121   122   123   124 
The Impact of Crew Competency and Procedure Compliance on Minimizing Pertamina’s Fleet Downtime through PMS Effectiveness Jamal Asri Sunandi; Nurhadi Siswantoro; Dwi Priyanta
International Journal of Marine Engineering Innovation and Research Vol. 11 No. 3 (2026)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v11i3

Abstract

Technical disruptions causing unplanned ship downtime present a costly challenge for PT X. Although the International Safety Management (ISM) Code mandates a Planned Maintenance System (PMS), its practical effectiveness depends heavily on human and organizational factors—specifically crew technical competence and SOP compliance. This study aims to determine the priority weights of criteria influencing PMS effectiveness and identify strategic interventions to reduce fleet downtime. A mixed qualitative–quantitative approach based on Multi-Criteria Decision Making (MCDM), specifically the Analytic Hierarchy Process (AHP), was employed to construct a four-level decision hierarchy. Pairwise comparison data were gathered from 7–10 operational and managerial experts at PT X. Expert judgments were aggregated using the geometric mean method and validated through consistency ratio testing ($CR \le 0.10$) and Kendall's Coefficient of Concordance ($W \ge 0.70$). Robustness was further verified using One-at-a-Time (OAT) and threshold sensitivity analyses. The findings anticipate that Procedural and SOP Compliance will emerge as the most dominant criterion, closely followed by Crew Technical Competence. Among the strategic alternatives, PMS Digitalization and Periodic SOP Audits are projected as the top priorities. These results are contextualized against DNV Maritime Safety Trends data (2014–2024) to align PT X challenges with global industry patterns. Ultimately, this study provides PT X management with an evidence-based, weighted decision-support framework to optimize interventions and minimize operational fleet downtime.
sebuah Distribusi Cr, Ni, Cu, dan Zn di Kolam Budidaya Sungai Praambatan, Batu, Jawa Timur Juli Yanti Pangaribuan; Asus Maizar Suryanto Hertika; Muhammad Musa
International Journal of Marine Engineering Innovation and Research Vol. 11 No. 3 (2026)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v11i3

Abstract

Heavy metals accumulated in sediments have the potential to be transferred to benthic organisms and affect the quality of aquaculture water sources. This study aims to analyze variations in the accumulation of heavy metals Cr, Ni, Cu, and Zn in sediments and Sulcospira testudinaria in inlet rivers, cultivation ponds, and outlet rivers to describe the distribution patterns of heavy metals and evaluate the potential of Sulcospira testudinaria as a bioindicator of heavy metal pollution in freshwater. Metal concentrations in sediments and Sulcospira testudinaria were analyzed using ICP-AES, while bioaccumulation ability was evaluated by calculating the Biota-Sediment Accumulation Factor (BSAF). The results showed that the concentrations of Cr and Zn in sediments were still below the Interim Sediment Quality Guideline (ISQG), Cu was in the range of ISQG-Probable Effect Level (PEL), while Ni at most stations exceeded the PEL. The metal accumulation pattern in Sulcospira testudinaria follows the order Zn > Cu > Ni > Cr. The average BSAF values indicate that Cu (1.72) and Zn (2.97) have high bioaccumulation capacity (BSAF>1), while Cr (0.34) and Ni (0.25) have low bioaccumulation capacity (BSAF<1). Therefore, Sulcospira testudinaria has the potential to be used as a bioindicator of heavy metal pollution in freshwater systems.
ANALISIS PENGARUH CYCLONE INTAKE MANIFOLD TERHADAP PROSES PEMBAKARAN PADA MESIN DIESEL DENGAN METODE CFD Fathur Rahman; Semin; Alfiy Alfatarizqi
International Journal of Marine Engineering Innovation and Research Vol. 11 No. 3 (2026)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v11i3

Abstract

Improving the air-fuel mixing process remains a practical route for increasing the combustion quality of naturally aspirated marine diesel engines. This study evaluates a passive cyclone installed in the intake manifold of a single-cylinder Yanmar TF-85 MH engine using three-dimensional computational fluid dynamics and experimental validation. Twenty-seven cyclone geometries were generated from combinations of vane height, vane length, and twist angle, and simulations were performed at 1,600, 1,800, and 2,000 rpm. The numerical model employed an RNG k-epsilon turbulence formulation, moving-valve and piston domains, a chemical-kinetics combustion solver, and a B40 surrogate composed of methyl decanoate and n-dodecane. The optimum geometry, designated GD 11560, increased turbulent kinetic energy from 330.35 to 367.34 m2/s2, or 11.20%, while reducing the inducted air mass by 4.12%. The indicated mean effective pressure increased by 1.88% at 1,600 rpm and 0.36% at 1,800 rpm, but decreased by 0.87% at 2,000 rpm. Maximum combustion temperature and pressure rose by 2.43% and 1.08%, respectively, at 1,600 rpm. Validation errors remained below 5%. The cyclone therefore improves low-to-medium-speed combustion through stronger axial-tangential motion, although its flow restriction becomes important at high speed.
Effect of Cyclone on Marine Diesel Engine Performance Mochammad Arif Hidayatullah; Semin; Alfiy Alfatarizqi
International Journal of Marine Engineering Innovation and Research Vol. 11 No. 3 (2026)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v11i3

Abstract

Small direct-injection (DI) diesel engines remain indispensable for stationary power generation and small marine applications, where improving their output and fuel economy carries real practical value. This study evaluates the effect of modifying an intake manifold using a passive cyclone-type swirl generator on the performance of a marine diesel engine. The research presents a combined numerical and experimental approach to analyze the impact of the cyclone on engine power, torque, brake specific fuel consumption (BSFC), and thermal efficiency. Numerical simulations using Ansys Forte were initially conducted on 27 cyclone geometries to identify optimal turbulent kinetic energy (TKE) generation. Subsequently, experimental testing was performed on a Yanmar TF-85 single-cylinder diesel engine across varying speeds (1400–2200 RPM) and loads (1–3 kW). The numerical results indicated that the 110560-cyclone model generated the highest TKE (+11.20%) despite a slight reduction in mass flow. Experimental findings revealed that the cyclone significantly enhanced power and torque at low-to-medium speeds (1400–1800 RPM). Notably, at 1800 RPM, the optimal cyclone reduced BSFC by up to 20.8% and increased thermal efficiency by 26.3% compared to the standard intake. The enhanced TKE improved air-fuel homogenization, which successfully compensated for the slight volumetric efficiency drop at high speeds, providing practical evidence for intake-side swirl enhancement as an affordable route to improved marine engine performance
Analysis of Cylinder Lubrication Strategy for Wear Reduction and Performance Improvement in Common Rail Marine Diesel Engines Fueled with LSFO Agus Khumaidi; Benny Cahyono
International Journal of Marine Engineering Innovation and Research Vol. 11 No. 3 (2026)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v11i3

Abstract

The implementation of the IMO 2020 regulation (MARPOL Annex VI), limiting marine fuel sulphur content to 0.5% m/m, has introduced new operational challenges to the Pertamina International Shipping fleet operating Wärtsilä 7RT-flex 58T and MAN Mitsui engines equipped with common rail systems. Indonesian LSFO supplied from local bunker sources exhibits very low kinematic viscosity (3–21 mm²/s at 50 °C) far below the global VLSFO average of approximately 80–105 mm²/s and has been associated with a series of incidents including compression-area oversizing, piston ring breakage, and cylinder liner cracking. This paper addresses these challenges through a systematic analysis of the cylinder lubrication strategy, comprising: (1) comprehensive characterization of three representative Indonesian LSFO samples from Cilacap, a Jakarta blend, and a Singapore baseline (2) evaluation of combustion chamber condition under various cylinder oil configurations and (3) analysis and evaluation of cylinder oil Base Number (BN) and feed rate. The methodology integrates fuel characterization (ASTM D445, D4052, HFRR ISO 12156-1, SARA D2007), engine testing over 27 screening combinations (3 fuels × 3 BN × 3 feed rates, 25 hours per condition) followed by validation of the 9 best combinations (100 hours per condition), and deposit characterization via XRD, SEM-EDS, and Vickers microhardness. The results confirm the predictions of VPS (2020) and Schildhauer (2019) that pairing BN 40 cylinder oil with low-sulphur LSFO causes abrasive CaCO₃ deposit accumulation (62% w/w by Rietveld refinement), triggering wear rates 4–5 times above normal. The best performing combination is identified at BN 25 with a feed rate of 0.7 g/kWh for low-sulphur Indonesian LSFO (Samples A and B), yielding iron content of 145–170 ppm, stable reserve BN of 28–35%, and wear rates of 0.016–0.022 mm/1000 h all well within acceptable thresholds while the baseline Sample C retains its optimum at BN 40 with 0.9 g/kWh, consistent with international practice. A viscosity- and sulphur-based decision tool is developed as a practical output and is projected to save USD 245 thousand per vessel-year (26.5%) compared with current baseline operation, supporting the safe, reliable, and economical implementation of Indonesian LSFO under the IMO 2020 regime.
Simulation of a Refrigerated Sea Water (RSW) Based Cooling System for a 30 GT Purse Seine Fishing Boat Nur Hasan; Sutopo Purwono Fitri; Ede Mehta Wardhana
International Journal of Marine Engineering Innovation and Research Vol. 11 No. 3 (2026)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v11i3

Abstract

The use of block ice by traditional fishermen at Muncar Port, Banyuwangi, presents technical and economic limitations, such as increased vessel weight leading to higher fuel consumption and reduced cargo hold capacity. This thesis research aims to design and analyze the performance of a Refrigerated Sea Water (RSW) cooling system using a closed-loop recirculation method for the hold of a 30 GT purse seine vessel (KM Kota Abadi). The system is designed to cool 11,144 kg of pelagic fish from an initial temperature of 30 °C down to −5 °C within a target time of 3 hours. Based on analytical calculations, the total cooling load required is 4,094 MJ, necessitating a design refrigeration capacity of 436 kW using R404A refrigerant and a semi-hermetic screw compressor. The chilled seawater circulation system requires a flow rate of 100 m³/h, evenly distributed through 8 spray nozzles per hold at a spray velocity of 8 m/s. Cooling performance evaluation was conducted through 3D transient Computational Fluid Dynamics (CFD) simulations using ANSYS Fluent across 90% and 70% hold filling rate variations. The numerical model was validated against the transient analytical results at the 30th second, demonstrating high agreement with a percentage error in Area-Weighted Average Wall Heat Flux of only 3.22% (7,989.13 W/m² for the numerical model versus 7,740.00 W/m² for the analytical method). Simulation results revealed that although the air temperature distribution inside the hold was relatively similar for both variations (~271 K to ~307 K), the wall heat flux parameter on the fish surface showed significant differences in cooling effectiveness. A 70% filling rate proved to be faster and more effective due to lower thermal load and minimal shadowing effect, whereas a 90% filling rate resulted in slower heat dissipation with a maximum heat flux peaking at 6,687 W/m² (18.3% higher than the 70% variation).
Pemantauan Penyimpangan Rute Berorientasi VTS untuk Kendaraan Permukaan Otonom Menggunakan Telemetri Pelacakan Titik Arah dan Peringatan Navigasi Dwi Antoro; Nursyamsu; Dapid Rikardo; Kusharyanto; Setyawan Ajie Sukarno
International Journal of Marine Engineering Innovation and Research Vol. 11 No. 3 (2026)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v11i3

Abstract

Autonomous surface vehicles (ASVs) are increasingly deployed for hydrographic survey, coastal observation, and unmanned maritime monitoring. Although autonomous waypoint navigation enables an ASV to execute predefined missions, shore-side operators still require a supervision mechanism that can interpret navigation telemetry, identify route deviation tendencies, and provide timely operational alerts. This paper proposes a VTS-oriented route deviation monitoring framework for ASVs using waypoint-tracking telemetry and navigation alert classification. The proposed framework utilizes mission waypoints, actual GPS position, heading, speed, mission status, and communication streams to evaluate whether the vessel remains consistent with its planned navigation task. Instead of focusing on onboard control performance, the framework transforms waypoint error, heading deviation, and telemetry status into operator-oriented alert levels, namely normal, caution, warning, and danger. The framework is developed using datasets and system components from a catamaran-type ASV testbed supported by autonomous waypoint navigation, web-based telemetry transmission, and onboard logging infrastructure. The available navigation dataset consists of ten simulation trials and ten real-world trials, with baseline results showing a mean waypoint error of 0.49 m and mean heading error of 4.21° in simulation, and a mean waypoint error of 1.15 m and mean heading error of 10.8° under real-world operation. The monitoring infrastructure further supports real-time supervision through web-based telemetry and low-latency data transmission, with previous testing reporting a GPS positional error of 3.66 m, data fetch time of 199 ms, and data transmission time of 165 ms. In addition, mission logging data demonstrated a 618.0 s operational record with 100.0% file completeness and 99.81% multi-sensor continuity. These results indicate that the developed ASV testbed provides sufficient telemetry readiness for route deviation monitoring and shore-side navigation alert generation. Unlike previous studies that focus on waypoint control, communication performance, or onboard collision avoidance, this study positions route deviation monitoring as a VTS-relevant safety supervision layer for small and medium ASVs operating in restricted and coastal waters.
Pemantauan Risiko Tabrakan dari Darat untuk Kendaraan Permukaan Otonom Menggunakan Penilaian Pertemuan CPA/TCPA Dedtri Anwar; Zainal Arifin; Siwi Woro Herningsih; Deny Adi Setyawan; Setyawan Ajie Sukarno
International Journal of Marine Engineering Innovation and Research Vol. 11 No. 3 (2026)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v11i3

Abstract

Autonomous surface vehicles (ASVs) require reliable encounter assessment to support remote supervision in restricted and coastal waters. This paper proposes a shore-side collision-risk surveillance approach based on Closest Point of Approach (CPA) and Time to Closest Point of Approach (TCPA). The proposed framework combines own-ship telemetry, target-track data, relative-motion estimates, and communication status to produce a four-tier alert status for the monitoring operator. Evaluation used records from waypoint navigation, dynamic obstacle trials, web-based telemetry, and fail-safe testing. Simulation and field navigation produced mean waypoint errors of 0.49 and 1.15 m and mean heading errors of 4.21° and 10.8°, respectively. Ten dynamic obstacle trials achieved 100.0% avoidance success and mission recovery, with a mean activation delay of 0.004 s, observation-to-maneuver time of 0.881 s, and avoidance duration of 54.184 s. The communication infrastructure reported a GPS error of 3.66 m, data-fetch time of 199 ms, transmission time of 165 ms, and end-to-end monitoring latency below 250 ms. The combined records demonstrate adequate data readiness for encounter surveillance, while full CPA/TCPA validation still requires continuous target trajectories. The resulting approach supports remote situational awareness without changing the existing vehicle-control architecture.
Financial Feasibility Analysis of Vannamei Shrimp (Litopenaeus vannamei) Farming in Mesjid Raya District, Aceh Besar Regency, Indonesia Nova Lianda Tambunan; Makwiyah A. Chaliluddin; Ichsan Setiawan
International Journal of Marine Engineering Innovation and Research Vol. 11 No. 3 (2026)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v11i3

Abstract

Vannamei shrimp (Litopenaeus vannamei) is one of Indonesia's leading aquaculture commodities, by which high economic value and significant export potential are held. This study was aimed, so that the financial feasibility of vannamei shrimp farming in Mesjid Raya District, Aceh Besar Regency, was analyzed. The research was conducted from December 2025 to May 2026 using observation and structured interviews with 37 shrimp farmers who were selected through purposive sampling and surveyed using a census approach. Primary data were collected through questionnaires and field observations, whereas secondary data were obtained from relevant literature and institutional reports. Financial feasibility was analyzed using short-term indicators, including investment, production costs, revenue, profit, and the Revenue Cost Ratio (R/C), as well as long-term indicators that are consisted of Net Present Value (NPV), Net Benefit Cost Ratio (Net B/C), Internal Rate of Return (IRR), and Payback Period (PP). It was shown by the results that the average R/C values ranged from 1.46 to 2.81, by which it is indicated that revenues exceeding production costs were generated by all farming enterprises. Positive NPV values ranging from IDR 30,790,484.79 to IDR 2,889,612,837.71, Net B/C values between 2.07 and 3.12, IRR values ranging from 39% to 68%, and Payback Periods between 1.5 and 2.6 years were revealed by the long-term financial analysis. It is indicated by these findings that vannamei shrimp farming in all study villages is financially feasible and profitable, with the highest investment, revenue, profit, and long-term financial performance being shown by Lamreh Village.
Integrating Master’s Voyage Planning Competence and Green Voyage Management to Improve Fuel Efficiency, Emission Performance, and Operational Reliability in Commercial Shipping Barnabas Fendy Tallu; Egber Edward Djajasasana; Sarifuddin; Sultan
International Journal of Marine Engineering Innovation and Research Vol. 11 No. 3 (2026)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v11i3

Abstract

The transition toward sustainable maritime transportation requires more than technological innovation; it also depends on the competence of maritime professionals responsible for operational decision-making. This study investigates the role of Master’s voyage planning competence in improving sustainable shipping performance through green voyage management. A mixed-method approach is proposed by integrating Partial Least Squares Structural Equation Modeling (PLS-SEM) with qualitative validation from maritime professionals. The conceptual model examines the relationships between Master’s voyage planning competence, green voyage management, fuel efficiency, emission performance, and operational reliability in commercial shipping. The findings indicate that management-level nautical competence significantly contributes to the implementation of green voyage practices, which subsequently enhance fuel efficiency, reduce emission intensity, and improve operational reliability. The study contributes to maritime transport management literature by extending green shipping research beyond technological perspectives and highlighting human competence as a strategic capability for sustainable maritime operations. The proposed model provides practical implications for shipping companies, maritime education institutions, and regulators in developing competency-based strategies aligned with global decarbonisation objectives.

Page 123 of 124 | Total Record : 1231

 120   121   122   123   124 

Filter by Year

2016 2026


Reset
Filter By Issues
All Issue Vol. 11 No. 3 (2026) Vol. 11 No. 2 (2026) Vol. 11 No. 1 (2026) Vol. 10 No. 4 (2025) Vol. 10 No. 3 (2025) Vol 10, No 2 (2025) Vol. 10 No. 2 (2025) Vol 10, No 1 (2025) Vol. 10 No. 1 (2025) Vol. 9 No. 4 (2024) Vol 9, No 4 (2024) Vol. 9 No. 3 (2024) Vol 9, No 3 (2024) Vol 9, No 2 (2024) Vol. 9 No. 2 (2024) Vol 9, No 1 (2024) Vol. 9 No. 1 (2024) Vol 8, No 4 (2023) Vol. 8 No. 4 (2023) Vol. 8 No. 3 (2023) Vol 8, No 3 (2023) Vol 8, No 2 (2023) Vol. 8 No. 2 (2023) Vol 8, No 1 (2023) Vol. 8 No. 1 (2023) Vol. 7 No. 4 (2022) Vol 7, No 4 (2022) Vol. 7 No. 3 (2022) Vol 7, No 3 (2022) Vol 7, No 2 (2022) Vol. 7 No. 2 (2022) Vol 7, No 1 (2022) Vol. 7 No. 1 (2022) Vol 6, No 4 (2021) Vol. 6 No. 4 (2021) Vol. 6 No. 3 (2021) Vol 6, No 3 (2021) Vol 6, No 2 (2021) Vol. 6 No. 2 (2021) Vol 6, No 1 (2021) Vol. 6 No. 1 (2021) Vol. 5 No. 4 (2020) Vol 5, No 4 (2020) Vol 5, No 3 (2020) Vol. 5 No. 3 (2020) Vol 5, No 2 (2020) Vol. 5 No. 2 (2020) Vol 5, No 1 (2020) Vol. 5 No. 1 (2020) Vol 4, No 3 (2019) Vol. 4 No. 3 (2019) Vol. 4 No. 2 (2019) Vol 4, No 2 (2019) Vol 4, No 1 (2019) Vol. 4 No. 1 (2019) Vol 3, No 4 (2019) Vol. 3 No. 4 (2019) Vol 3, No 3 (2019) Vol. 3 No. 3 (2019) Vol 3, No 2 (2018) Vol. 3 No. 2 (2018) Vol 3, No 1 (2018) Vol. 3 No. 1 (2018) Vol 2, No 4 (2018) Vol. 2 No. 4 (2018) Vol 2, No 3 (2018) Vol. 2 No. 3 (2018) Vol. 2 No. 2 (2018) Vol 2, No 2 (2018) Vol. 2 No. 1 (2017) Vol 2, No 1 (2017) Vol. 1 No. 4 (2017) Vol 1, No 4 (2017) Vol. 1 No. 3 (2017) Vol 1, No 3 (2017) Vol. 1 No. 2 (2017) Vol 1, No 2 (2017) Vol 1, No 1 (2016) Vol. 1 No. 1 (2016) More Issue