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Effect of sandblasting on the characterization of 95MXC coating layer on 304 stainless steel prepared by the twin wire arc spray (TWAS) coating method Deni Fajar Fitriyana; Windy Desti Puspitasari; Agustinus Purna Irawan; Januar Parlaungan Siregar; Tezara Cionita; Natalino Fonseca Da Silva Guteres; Mateus De Sousa Da Silva; Jamiluddin Jaafar
Mechanical Engineering for Society and Industry Vol. 4 No. 2 (2024)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/mesi.10898

Abstract

Twin wire arc spraying (TWAS) is a thermal spray process that is widely used in various industries. Nevertheless, the impact of repeated sandblasting on the coating characteristics of FeCrBSiMn coating created using the TWAS technique has not been extensively researched. Therefore, this study aims to investigate the influence of repeated sandblasting on the properties of the FeCrBSiMn coating layer created using the TWAS process. The study used stainless steel 304, 75B, and FeCrBSiMn as the substrate, bond coat, and top coat materials. The substrate materials underwent sandblasting with a repetition of 1, 2, and 3 cycles before the coating procedure. The coating's quality in this study was assessed using surface roughness, thickness, hardness, corrosion rate, bond strength, and Scanning Electron Microscope (SEM) examination. The findings of this investigation indicate that the sandblasting treatment substantially elevates the surface roughness of 304 stainless steel substrates. As the substrate surface becomes rougher, there is an increase in the percentage of porosity and unmelted material, as well as an increase in the thickness of the coating layer. Furthermore, the hardness of the resulting coating layer diminishes. Specimen A exhibited superior qualities in comparison to the other specimens. The coating layer on this specimen has a percentage of unmelted material and porosity, thickness, hardness and adhesion of 7.122%, 0.125 mm, 1081.6 HV and 14.5 MPa respectively. This investigation's results indicate that the substrate material's corrosion rate (x 10−6 mmpy) is 3648.6, which is lower than the corrosion rate of specimen A, which is 37.802.
SYSTEMATIC LITERATURE REVIEW INNOVATION MODEL AS A MEDIATING AND MODERATING VARIABLE IN MSMEs PERFORMANCE I Wayan Sukania; Agustinus Purna Irawan; Fransisca Iriani Roesmala Dewi
International Journal of Application on Economics and Business Vol. 2 No. 3 (2024): Agustus 2024
Publisher : Graduate Program of Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/ijaeb.v2i3.279-287

Abstract

Systematic literature reviews that focus on research on innovation variables as moderating and mediating exogenous variables on the performance of Micro, Small and Medium Enterprises (MSMEs) are still relatively rare. Therefore, the aim of this research is to determine the factors that influence MSME performance which are mediated or moderated by innovation variables. This type of qualitative research uses the Systematic Literature Review method. Article data collection comes from the Google Scholar database. Based on the search results, 180 articles were obtained from 2015 to 2024. After selecting and adjusting them to the research objectives, 30 articles were obtained. The results of this research show that factors influencing MSME performance are mediated by innovation variables including business networks, competitor orientation, market orientation, learning orientation, marketing strategies, entrepreneurial characteristics, business capital, entrepreneurial orientation, entrepreneurial competencies, learning capital, learning capability, technology orientation , technological capability, transactional capability, innovation-oriented technology assimilation strategy, human resource information system, leadership, relational capability, knowledge management, relational capability, market orientation, administrative innovation strategy, customer orientation, market orientation, and HRM. Other findings also found that factors influencing MSME performance were moderated by innovation variables, including supply chain management practices, learning orientation, market orientation, total quality management, and social media adoption. Factors influencing innovation performance which are moderated by innovation variables include open innovation, social media strategic capability, and innovation culture. This research provides recommendations for MSME players to be able to utilize various innovation models or variables to further develop and have competitiveness. This research provides suggestions for future researchers in conducting SLR regarding MSME Innovation and Competitive Advantage by focusing on the Moderation model.
SYSTEMATIC LITERATURE REVIEW: EXPLORATION OF FACTORS THAT INFLUENCE INNOVATION PERFORMANCE AND MANUFACTURING COMPANY PERFORMANCE Lithrone Laricha Salomon; Agustinus Purna Irawan; Eko Suhartanto
International Journal of Application on Economics and Business Vol. 2 No. 3 (2024): Agustus 2024
Publisher : Graduate Program of Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/ijaeb.v2i3.162-182

Abstract

This research literature review that reviews the literature on the factors that influence innovation variables has been a lot, but those that review innovation performance variables are relatively still not much. Therefore, the literature review in this study aims to investigate the factors that affect innovation performance in manufacturing companies, as well as factors that act as mediation and moderation. The Systematic Literature Review (SLR) method is used in this study to analyze and review or look back at findings that are systematically identified based on previous research evidence related to factors that affect the innovation performance of manufacturing companies. Research data was obtained from Google Scholar with a time span of 2015-2023. Findings on journal searches found 304 articles. Based on the search for articles that discuss and focus on factors that affect the specific innovation performance of manufacturing companies, 25 articles were found. The article is used as a data source and will be examined in more depth. The results of the research found that (1) Various factors affect innovation performance in manufacturing companies; (2) Several factors can mediate and moderate exogenous (independent) variables on the innovation performance of manufacturing companies; and (3) Various theories have been used in research on the innovation performance of manufacturing companies. Therefore, manufacturing companies can use the above variables as factors that can be used to improve innovation performance to increase productivity, effectiveness, and can drive growth for manufacturing companies. These findings can be used as reference material for further research on variables that are able to mediate and moderate the relationship between exogenous variables on innovation performance in manufacturing companies and the theory used.
Nurse Anesthetists' Experience In Maintaining Patient Safety In The Operating Room With High Workload: A Phenomenological Qualitative Study Lukas Handoko; Agustinus Purna Irawan
JHSS (JOURNAL OF HUMANITIES AND SOCIAL STUDIES) Vol 9, No 2 (2025): Journal of Humanities and Social Studies
Publisher : UNIVERSITAS PAKUAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33751/jhss.v9i2.12092

Abstract

This study aims to explore in depth the experiences of nurse anesthetists in maintaining patient safety in operating rooms with high workloads. A qualitative descriptive approach with a phenomenological approach was used to explore the subjective meaning of nurse anesthetists towards their work challenges. Data were collected through in-depth interviews with ten nurse anesthetists in a general hospital with a minimum work experience criterion of two years. The results of the study identified five main themes, namely: (1) high workload characterized by high volume of operations and limited rest time, (2) the impact of workload on physical and psychological conditions and patient safety, (3) adaptation strategies such as time management, spiritual approaches, and team communication, (4) preparedness in dealing with emergency situations, and (5) the need for institutional support from hospital management. Senior nurses tend to rely more on experience, spirituality, and emotional control, while junior nurses need more supervision and advanced training. The conclusion of this study shows that high workload significantly affects the work performance and well-being of anesthesia nurses. Individual coping strategies and institutional support are key to maintaining patient safety and maintaining anesthesia nurse addiction in a high-intensity work environment. This study provides an important contribution to more humanistic hospital policies and supports frontline health workers.
Influence Of Satisfaction Level Patient To Outpatien Services In Hospitals (Case Study In Private Hospitals In West Jakarta) Irisha Kirana Wiradisuria; Agustinus Purna Irawan
JHSS (JOURNAL OF HUMANITIES AND SOCIAL STUDIES) Vol 9, No 2 (2025): Journal of Humanities and Social Studies
Publisher : UNIVERSITAS PAKUAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33751/jhss.v9i2.12087

Abstract

The background of this study is to understand how the level of patient satisfaction can affect the image and performance of a hospital, and to identify factors that contribute to patients' satisfaction and/or dissatisfaction. This study also aims to provide strategic recommendations for hospitals in improving the quality of service and creating a better patient experience. This study aims to identify and analyze factors that influence patient satisfaction in hospitals, focusing on the quality of medical services, hospital facilities, communication between patients and health workers, and service waiting time. Through a quantitative approach using a survey of 200 respondents consisting of outpatients and inpatients, the data obtained were analyzed using appropriate statistical methods, such as linear regression or SEM-PLS analysis, to identify the relationship between the variables studied. The results of the analysis were used to draw conclusions about the factors that most influence patient satisfaction. The final step is the preparation of a research report containing the main findings and recommendations for hospitals in improving the quality of service and overall patient satisfaction. The results of the study indicate that the quality of medical services and communication between patients and health workers have a significant influence on the level of patient satisfaction. In addition, hospital facilities and service waiting time also contribute to determining patient satisfaction, although to a lesser extent. SW Hospital needs to maintain and continuously improve the quality of medical services and existing facilities to ensure patient satisfaction levels remain high.
Mechanical Performance of Alkali-Treated Rattan Strips with Epoxy Coating for Sustainable Composite Applications Sujentheran Nair Kalatharan; Al Ichlas Imran; Agustinus Purna Irawan; Januar Parlaungan Siregar; Tezara Cionita; Deni Fajar Fitriyana; Samsudin Anis; Rozanna Dewi; Yuris Setyoadi; Wisnu Prayogo
Advance Sustainable Science Engineering and Technology Vol. 7 No. 3 (2025): May - July
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v7i3.2017

Abstract

The use of natural materials like rattan in eco-friendly composites is gaining attention in materials engineering. However, its hydrophilic nature and interaction with other materials can affect mechanical strength. This study investigates how variations in rattan size and alkali treatment influence the tensile properties of single rattan strips through an epoxy dipping process. Rattan was prepared with varying lengths (5–15 cm), widths (3–8 mm), and a consistent thickness (0.5 mm). Alkali treatment used 5% and 10% NaOH concentrations for 1 and 24 hours. Tensile testing showed that a 5 cm × 8 mm strip achieved the highest tensile strength (49.95 MPa), Young's modulus (3562.77 MPa), and low strain (5.4%), while the 15 cm × 3 mm strip had the lowest strength (9.48 MPa) and modulus (475.69 MPa) with higher strain (10.32%). A 5% NaOH treatment for 24 hours improved adhesion and performance, while 10% caused degradation.
Mechanical Properties of Epoxy Composite Reinforced with Spent Coffee Ground and Coffee Husk Etanto Heiliano Wijayanto; Al Ichlas Imran; Januar Parlaungan Siregar; Mohd Ruzaimi Mat Rejab; Tezara Cionita; Wisnu Prayogo; Deni Fajar Fitriyana; Rozanna Dewi; Thomas Junaedi; Agustinus Purna Irawan
Advance Sustainable Science Engineering and Technology Vol. 7 No. 4 (2025): August-October
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v7i4.2052

Abstract

This study aims to investigate the effect of increasing the concentration of natural filler on the mechanical properties of Spent Coffee Ground (SCG) / Coffee Husk (CH) reinforced epoxy matrix composite. The materials used in this study are epoxy resin as a matrix and waste coffee grounds and coffee husks as natural fillers with sizes of 100-mesh and concentrations of 10, 20, and 30 wt.%. The results showed that SCG 10 wt.% produced the best mechanical properties compared to the other samples based on tensile strength (19.58 MPa), tensile modulus (1.70 GPa), flexural strength (44.55 MPa), and flexural modulus (2.32 GPa). On the other hand, CH 30 wt.% contributed the highest hardness value of 50.33 HRB compared to other samples. The findings in this study prove that the appropriate composition will affect the compatibility between the filler and the matrix, thus impacting the mechanical properties of the composite. This phenomenon can be seen based on microscope analysis, which shows a strong interaction between the matrix and filler and the formation of voids and agglomeration
The Effect of Lean Management on Innovation Performance: How Absorptive Capacity Affects Food Manufacturing Industry? Lithrone Laricha Salomon; Agustinus Purna Irawan; Eko Suhartanto
Advance Sustainable Science Engineering and Technology Vol. 8 No. 1 (2026): November - January
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v8i1.2820

Abstract

This study analyzes the effect of Lean Management Practices (LMP) on Innovation Performance (IP) through the mediating role of Absorptive Capacity (AC) in Indonesia’s food and beverage industry. A structured questionnaire adapted from validated instruments (Gaspersz, 2007; Cohen & Levinthal, 1990; Damanpour, 1991) was distributed to 200 managers and supervisors from food manufacturing firms listed in the Indonesian Ministry of Industry registry, yielding 180 valid responses (90% response rate). Data were analyzed using Partial Least Squares Structural Equation Modeling (PLS-SEM) with SmartPLS 4.0, assessing reliability, convergent, and discriminant validity (HTMT ≤ 0.90). The results indicate that Lean Management strongly influences Absorptive Capacity (β = 0.919, p < 0.001) and both directly and indirectly enhances Innovation Performance (β = 0.690 and 0.725, respectively). Effect sizes (f² = 0.482 – 5.431) and R² > 0.83 confirm the model’s high explanatory power, while confidence intervals (95%) validate the path significance. These findings demonstrate that lean implementation enhances innovation effectiveness primarily through knowledge assimilation and transformation. The study’s main limitation is its single-sector, self-reported cross-sectional design, which may introduce common-method bias. Future research should apply multi-method or longitudinal approaches to increase generalizability.
Model Pengendalian Banjir Terpadu Dengan Manajemen Hulu-Tengah-Hilir Di Propinsi Lampung: Studi Kasus Way Bulok Kabupaten Pringsewu Anwar; Agustinus Purna Irawan; Endro Prasetyo Wahono
Borneo Engineering: Jurnal Teknik Sipil Volume 9 Nomor 1 Tahun 2025
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/be.v9i1.30

Abstract

This study aims to develop an integrated flood control model in the Way Bulok watershed, Pringsewu Regency, Lampung. Using the HEC-RAS application, a design flood discharge analysis was carried out to evaluate the potential for flooding based on maximum daily rainfall data from 2014 to 2024. The methods used include dispersion analysis, distribution suitability test, and design rainfall calculation using the Log Pearson III method. The results show that the design flood discharge value increases with increasing recurrence period, ranging from 25.17 m³/second to 123.76 m³/second. Inundation modeling at three focal points (upstream, middle, and downstream) shows no inundation at the two and 5-year return periods, while at the 10-year return period, one point experiences a maximum value without inundation. At the 25 year return period, two points experience inundation. This study concludes that the HEC-RAS model effectively predicts and controls flood potential in the Way Bulok Watershed, providing a strong basis for better water resource management and disaster mitigation strategies in the region.
Hospital Marketing Strategies to Increase the Number of Patient Visits M Miladi Fauzan; Agustinus Purna Irawan
Danadyaksa: Post Modern Economy Journal Vol. 4 No. 1 (2026): Post Modern Economy Journal
Publisher : Yayasan Pendidikan Islam Bustanul Ulum Mojokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69965/danadyaksa.v4i1.419

Abstract

The healthcare industry in Indonesia is facing increasingly intense competitive pressures, particularly in urban areas. According to data from the Indonesian Ministry of Health (2023), the total number of hospitals in Indonesia has reached more than 3,100, with the number of private hospitals increasing to more than 1,900. This growth forces each healthcare facility to develop more adaptive and data-driven marketing strategies. However, most hospitals, especially those in the middle to lower scale, still rely on conventional marketing approaches that have not optimally utilized digital platforms as communication channels for patients. This study aims to analyze the influence of hospital marketing strategies on the number of patient visits, focusing on three main variables: (1) digital promotion and marketing strategies, (2) service quality based on the 7P marketing mix, and (3) patient experience, as well as the mediating role of online reputation and patient trust. Patient experience in this study is operationally defined as the quality of service interactions perceived by patients, including the service process and staff interactions, while online reputation is defined as digital-based public perception formed through online reviews, ratings, and testimonials. The study uses a quantitative approach with an explanatory research design, namely the collection and analysis of quantitative data from structured surveys using a Likert-scale questionnaire for patients. Quantitative data analysis used the Structural Equation Modeling–Partial Least Squares (SEM-PLS) model. The expected outcome of this study is the formation of a strategic model that explains the relationship between hospital marketing variables and patient visits, while also generating practical recommendations for hospital management in designing effective, sustainable, and responsive marketing strategies to patient needs in the digital era.
Co-Authors Aang Subiyakto Aazokhi Waruwu Abd Rahim Bin Awang Achmad Sutowo Adrian Adrian Agus Halim Agus Halim Agus Halim Agus Halim, Agus Agustina Kahumako Agustina Kahumako Ahmad Athoillah Al Ichlas Imran Al Ichlas Imran Aldias Bahatmaka Alrasyid, Mochamad Dzaki Alvin Soesilo Antonius Singgih Setiawan Anwar Aripin, Muhammad Bustanul Averil, Robin Belda, Madeline Billy Muchtar Boris Karlop Lubangaol Boris Karlop Lumbangaol Bright Levin Tolukun Brigida Endah Nuraeni Bryan Septiano Christly Charisma Dwilestari Christopher Adryan Ichsan Cionita, Tezara Clementinus Benny Agung Pambayu Cokki Cokki Cokki Cokki Danardono Agus Sumarsono Danendra, Albertus Raditya Debataraja, Semangat Marudut Tua Deni Fajar Fitriyana Devotyasto, Mario Diana Putri Lazirkha Dimyati, Saeful Doringin, Ferry Eddy Supriyatna Marizar Edi Purwanto Edi Sumarya Eko Reinaldo Eko Suhartanto Elisabeth Dhany Retno Putri Emanoelle Napoleon Endah Murtiana Endro Prasetyo Wahono Erwin Siahaan Eryuniyanti, Eryuniyanti Esanov Azamat Esirgapovich Etanto Heiliano Wijayanto Eunice Mareth Querol Areola Eunice Mareth Querol Areola Finny Pratama Putera Fitriyana, Deni Fajar Frans Jusuf Daywin Fransisca I. R. Dewi Fransisca Iriani Roesmala Dewi Fransisca Iriani Roesmala Dewi Fransisca Iriani Roesmala Dewi Handoko, Lukas Haris Maupa Haris Maupa Haris Maupa Hasan Tjahaya Hetty Karunia Tunjungsari Husni Teja Sukmana I Wayan Sukania I Wayan Sukania Ichsan, Christopher Adryan Ignasius Heri Satrya Wangsa Indra Widjaja Indra Widjaja Irisha Kirana Wiradisuria Isyak Meirobie Isyak Meirobie Jamiluddin Jaafar Januar Parlaungan Siregar Januar Parlaungan Siregar Januar Parlaungan Siregar Januar Parlaungan Siregar Jasmine Syabania Noviantri Jason Waworuntu Jauhary, Minerva Cessilia Nafileita Jefvin Firnandius Johanis Anggawan Johanis Anggawan Junianto, Pilifus Kahumako, Agustina Kevin Jonathan JM Kevin Raynaldo Kistiawan, Tony Kriswanto Kriswanto, Kriswanto Latumahina, Fanya Felicia Nadin Lim, Andriew Lin, Linda Lin-Chin Linda Lin- Chin Lin Lithrone Laricha Salomon Lithrone Laricha Salomon Lucia Yeni Wijayatri Lukas Handoko M Miladi Fauzan M. Agung Wibowo, M. Manalu, Janviter Masdar Helmi Mateus De Sousa Da Silva Mega Waty Mega Waty Mega Waty Moehammad Gafar Yoedtadi Mohd Ruzaimi Mat Rejab Mubangaol, Boris Karlop Muh Masri Sari Muhammad Agung Wibowo Muhammad Idrus Taba Muhammad Khafidh Muji Muji Mutiara, Maitri Widya Nanda Syah Alam Napoleon, Emanoelle Natalino Fonseca Da Silva Guteres Noviyanto Noviyanto, Noviyanto Nuke Puji Lestari Santoso Nur Hidayah Ismail Oei Fuk Jin Oie Fuk jin Panie, William Dae Paramita, Sinta Paula T. Anggarina Paula Tjatoerwidya Anggarina Pilifus Junianto Pranoto, Wati A. Prasetyo, Ares Yudi Puspitasari, Windy Desti Putri, Dhita Widya Rahim Awang, Abd Rahmadi Yotenka Rahmat Doni Widodo Raynaldo, Kevin Revi Kristioni Rifky Ismail Robin Averil Rochimat, Dedy Rozanna Dewi Rudy Rudy Sadat, Andi Muhammad Samoedro, Erlang Samsudin Anis Santoso, Aloysius Budi Sari, Endah Murtiana Satrio Tauladan Setyanto, Yugih Sinta Paramita Siregar, Januar Parlaungan Sitinjak, Manuntun Siva, Farrell Sofyan Djamil Stefanus Billy Suugondo Sugih Rahmansyah Suhartanto, Eko Sujentheran Nair Kalatharan Supriyatna-Mz, Eddy Suriano Buyung Sutikno Sutikno Sutikno Tauladan, Satrio Tezara Cionita Tezara Cionita Theresia Dwinita Laksmidewi Thomas Junaedi Tolukun, Bright Levin Tresna P. Soemardi Umran, M. Fankar Utama, Didi Widya Wang, Yan-Ting Wati A Pranoto Wati A Pranoto Waworuntu, Jason Widjajalaksmi Kusumaningsih, Widjajalaksmi Widya Utama, Didi William Dae Panie Windy Desti Puspitasari Wisnu Prayogo Wulan Purnama Sari Yang, Ghung-Hsin Yehezkiel Panji Pamungkas Yuris Setyoadi