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PENGARUH PERSONAL BRANDING OWNER DAN STRATEGI PEMASARAN MELALUI INSTAGRAM MANGKOKKU TERHADAP MINAT BELI Tarigan, Arihta; Kembau, Agung Stefanus; Setiawan, Sean Nicholas; Wijaya, Hubert; Chandra, Steven
Ultima Management : Jurnal Ilmu Manajemen Vol 16 No 1 (2024): Ultima Management : Jurnal Ilmu Manajemen
Publisher : Universitas Multimedia Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31937/manajemen.v16i1.3553

Abstract - The purpose of this research is to see the influence of owner branding and marketing strategies via Instagram social media on buying interest in Mangkokku, where one of the founders of Mangkokku is Kaesang Pangarep who is the son of the president of the Republic of Indonesia. The number of respondents in this study was 100 and lived in Tangerang. The variables of this research include the personal branding of Mangkokku owner Kaesang Pangarep and also the marketing strategy via Mangkokku's Instagram account. This research uses a quantitative approach method by distributing questionnaires and processing the data using the SPSS application. This research concludes that the personal branding of the owner of Mangkokku does not influence people's buying interest in Tangerang City, but marketing strategies using social media Instagram influence people's buying interest in Tangerang City. Thus, to influence purchasing interest, Mangkokku must focus more on marketing strategies through social media, rather than just displaying the personal branding image of Kaesang Pangarep. Keyword : Instagram; Personal Branding; Retail Marketing; Social Media

OPTIMASI PRODUKTIVITAS SUMUR X MELALUI ANALISIS PENGGUNAAN SISTEM GAS LIFT DENGAN PENDEKATAN SOFTWARE KOMERSIAL Erlely, Roberth; Chandra, Steven; Silahooy, Stevi
Petro : Jurnal Ilmiah Teknik Perminyakan Vol. 13 No. 4 (2024): Desember 2024
Publisher : Jurusan Teknik Perminyakan Fakultas Teknologi Kebumian dan Energi Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/petro.v13i4.21594

Decreased well productivity is a common problem in the petroleum industry caused by decreased flow rates and reservoir pressure. One solution to overcome this problem is the use of artificial lift, namely the gas lift method. Gas lift is a method that injects high-pressure gas into the well to reduce hydrostatic pressure, allowing the fluid to rise to the surface. This study aims to analyze the effectiveness of the gas lift system in increasing the productivity of well X using commercial software. The method used in the research is a quantitative method with the help of commercial software used as a data processing tool. The results showed that the optimum production rate that can be achieved at well X is 378.32 STB/day with an optimum gas injection rate of 0.3 MMscf/day. In addition, several parameters affecting well productivity were analyzed, namely water cut, reservoir pressure, and gas injection rate where it was found that every 10% increase in water cut caused a decrease in production of 40-43 STB/day, while a decrease in reservoir pressure to 500 psig decreased production from 435.5 STB/day to 162.3 STB/day. Increasing the gas injection rate is proven to increase oil production, but there is an optimal limit to avoid increasing operational costs that are not balanced with increased production.

Critical Factors in Injector Well Design for Carbon Capture and Storage Campaign in Field “X” Wardhana, Annisa Nur Syifa; Chandra, Steven; Tony, Brian
Journal of Petroleum and Geothermal Technology Vol. 5 No. 2 (2024): November
Publisher : Universitas Pembangunan Nasional "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jpgt.v5i2.13144

Indonesia’s total energy supply increased nearly 60% from 2000 to 2021. However, the total energy sector emissions have grown faster than energy demand, more than doubling over the last two decades. In 2021, energy sector emissions were around 600 million tonnes of carbon dioxide (Mt CO₂) – making Indonesia the world’s ninth-largest emitter. Indonesia faces a big challenge with the target to reach net zero emissions by 2060. Carbon capture and storage (CCS) is considered as a potential solution. However, CO₂ injection wells face well integrity issues that may lead to leakage. One of the most common problems in CO₂ injection wells is corrosion. Corrosion may cause damage on the downhole equipment which leads to degradation of the well integrity. Therefore, a thorough material selection should be considered. This study examines critical factors in designing CO₂ injector wells for a CCS campaign in Field "X", a major offshore gas condensate field with a planned injection rate of 160.2 MMSCFD. This study aims to determine suitable casing schemes, tubular material selection, and corrosion analysis for CO₂ injector wells, while evaluating leakage potential based on well barrier concepts. The drilling of “X” field CO₂ injection wells is planned to be executed with an estimated five casing sections consists of 30” conductor casing, 20” surface casing, 13-3/8” intermediate casing, 9-5/8” intermediate liner and 7” production liner. Based on the analysis using ECE (Electronic Corrosion Engineer) software, ISO 15156-3 standard, and the Nippon steel chart, the most suitable tubular materials for the CO₂ injector well is Duplex Stainless Steel SM22Cr or SM25CR.

Implementation of CO2 Source-Sinks Match Database Development. Case Study: West Java Tony, Brian; Nugraha, Fanata Yudha; Al Hakim, Muhamad Firdaus; Putra, I Putu Raditya Ambara; Chandra, Steven
Journal of Petroleum and Geothermal Technology Vol. 5 No. 2 (2024): November
Publisher : Universitas Pembangunan Nasional "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jpgt.v5i2.13432

Carbon capture and storage (CCS) is widely recognized as a significant technology in mitigating carbon dioxide (CO2) emissions from major industrial facilities, such as power plants and refineries. CCS involves the capture of concentrated CO2 streams from point sources, followed by subsequent safe and secure storage in appropriate geological reservoirs. We developed spatial database system using Geographic Information System (GIS) tools to facilitate source-sink matching between CO2 emitter and CO2 storage to foster the implementation of CCS/CCUS technologies in Indonesia. In this study, we proposed workflow approach to determine the location of CO2 sinks/storage candidates given limited data available. Additionally, this method spatially characterizes and represents probable clusters where opportunities for CCS/CCUS implementation are present. We consider the existing pipeline route and Right of Ways (ROW) to minimize the potential cost related to transportation of CO2 using pipeline. The priority of available storage is classified based on the storage capacity, distance, and other technical criteria to determine the optimal location of potential CO2 injection. We applied the workflow to Coal Fired Power Plant in West Java as the CO2 source, and we obtained 6 depleted fields that are connected to the existing ROW with CO2 storage capacity of 42.03 MMT.

Comparative Analysis of RESTful, GraphQL, and gRPC APIs: Perfomance Insight from Load and Stress Testing Chandra, Steven; Farisi, Ahmad
Jurnal Sisfokom (Sistem Informasi dan Komputer) Vol. 14 No. 1 (2025): JANUARY
Publisher : ISB Atma Luhur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32736/sisfokom.v14i1.2315

Backend constitutes a critical component of digital infrastructure, responsible for processing business logic, managing data, and facilitating communication between software systems. APIs serve as the interface that enables software interaction and plays a pivotal role in backend operations. This study investigates the performance of three API architectures: RESTful, GraphQL, and gRPC. The experimental approach involves the implementation of Load Testing and Stress Testing to assess the performance of these architectures. The experiment utilizes a dedicated server and client hardware to simulate real- world conditions, with parameters such as CPU usage, memory usage, response time, load time, latency, success rate, and failure rate evaluated using a dataset comprising 1,000 rows of student- related records. Result show that RESTful achieves the highest total request but exhibit greater resource consumption and a higher failure rate. GraphQL demonstrated better CPU and memory efficiency with strong stability, though it has higher latency and slower response times. gRPC strikes a balance with a moderate latency and resource usage, albeit with slightly higher memory consumption under stress. By presenting a comprehensive analysis of each API architecture, this study contributes a comprehensive performance analysis under practical testing scenarios giving developers and system architect with data-driven guidance for selecting API architecture to their application needs. RESTful is well suited for high-throughput scenarios with less critical operations, GraphQL excels in resource efficiency and stability, and gRPC offers balanced performance across diverse workloads.

Redefining EOR In Indonesia’s Oil & Gas Industry: A Novel Solution to Overcome Lengthy Lag Time from EOR Implementation In Indonesia Post Gross Split Fiscal System Chandra, Steven; Rachmat, Sudjati
Indonesian Journal of Energy Vol. 1 No. 2 (2018): Indonesian Journal of Energy
Publisher : Purnomo Yusgiantoro Center

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33116/ije.v1i2.26

In the wake of a new fiscal system related to oil and gas industry in Indonesia, namely the gross split system, concerns have been risen due to the fact that the new regulation puts forward EOR as an obligation for oil and gas contractors in order to gain significant incentives to improve field economics. Although EOR itself is a mature and proven technologically and economically to alleviate oil production thus encouraging profitable business, it has to be realized that most greenfields in Indonesia are relatively small compared to previous discoveries or case studies encountered abroad, rendering EOR to be economically obsolete to be implemented in full field scale. This study presents a new concept and suggestions for stakeholders to implement massive tertiary recovery in oil reservoirs around Indonesia using the less expensive and more result oriented, reducing the need for lengthy procedure before full scale EOR can take place.

PENGARUH PERSONAL BRANDING OWNER DAN STRATEGI PEMASARAN MELALUI INSTAGRAM MANGKOKKU TERHADAP MINAT BELI Tarigan, Arihta; Kembau, Agung Stefanus; Setiawan, Sean Nicholas; Wijaya, Hubert; Chandra, Steven
ULTIMA Management Vol 16 No 1 (2024): Ultima Management : Jurnal Ilmu Manajemen
Publisher : Universitas Multimedia Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31937/manajemen.v16i1.3553

Abstract - The purpose of this research is to see the influence of owner branding and marketing strategies via Instagram social media on buying interest in Mangkokku, where one of the founders of Mangkokku is Kaesang Pangarep who is the son of the president of the Republic of Indonesia. The number of respondents in this study was 100 and lived in Tangerang. The variables of this research include the personal branding of Mangkokku owner Kaesang Pangarep and also the marketing strategy via Mangkokku's Instagram account. This research uses a quantitative approach method by distributing questionnaires and processing the data using the SPSS application. This research concludes that the personal branding of the owner of Mangkokku does not influence people's buying interest in Tangerang City, but marketing strategies using social media Instagram influence people's buying interest in Tangerang City. Thus, to influence purchasing interest, Mangkokku must focus more on marketing strategies through social media, rather than just displaying the personal branding image of Kaesang Pangarep. Keyword : Instagram; Personal Branding; Retail Marketing; Social Media

A Comparison of Endotracheal Intubation Success Using Video Laryngoscopy and Reconstructed Laryngoscopes Among Health Workers in Nusa Penida Parami, Pontisomaya; Tethool, Heinz Fernando; Chandra, Steven
JAI (Jurnal Anestesiologi Indonesia) Vol 17, No 3 (2025): JAI (Jurnal Anestesiologi Indonesia)
Publisher : Perhimpunan Dokter Spesialis Anestesiologi dan Terapi Intensif

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jai.v0i0.70666

Background: Endotracheal intubation is a critical procedure in the management of patients with respiratory distress. The two main methods used are video laryngoscopy and reconstructive laryngoscopy. This study aims to compare the duration and number of intubation attempts using video laryngoscopy and reconstructed laryngoscopy in health workers in Nusa Penida.Objective: This study aimed to compare the time and number of endotracheal intubations performed by healthcare workers in Nusa Penida using two strategies, video laryngoscopy and repeat laryngoscopy. The study involved healthcare specialists who performed intubations in the model, with two groups of 31 people each.Methods: This study used a quasi-experimental design involving health workers in Nusa Penida who performed endotracheal intubation using a video laryngoscope and a reconstructed laryngoscope on mannequins. Two groups of 31 samples were created for the study, and both were given intubation training using a laryngoscope video and direct laryngoscopy.Results: The outcomes of this study were the duration of intubation and the number of attempts required by each respondent to intubate successfully after training. The study used statistical analysis to compare outcomes, employing a paired t-test. The results indicated that the average duration of intubation using laryngoscopy was 31.7 seconds (range: 13 - 93 seconds), while video laryngoscopy took 22.9 seconds (range: 11-49 seconds), with a significance level of P < 0.014. Additionally, the average number of intubation trials was 1.29 (range: 1 - 3) for direct laryngoscopy and 1.03 (range: 1 - 2) for video laryngoscopy, with a significance level of P < 0.018.Conclusion: There is a difference in the use of the video laryngoscope better in terms of duration and intubation attempts.

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