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Rubber ( Hevea brasiliensis Muell. Arg.) is an important plantation crop due to its economic value and adaptability to various environments. Producing uniform and vigorous planting materials requires efficient propagation methods capable of maintaining juvenile characteristics. This study aimed to determine the best propagation method and clone based on shoot formation rate and shoot length in Hevea brasiliensis . The experiment was conducted from March to July 2024 at the Entres Garden of PT. Socfindo, Tanah Besih Estate, Serdang Bedagai, North Sumatra, Indonesia (±15 m a.s.l.). A completely randomized design (CRD) was applied with two factors: propagation method (mature budding and in vitro propagation) and clone type (IRCA 19, PB 235, PB 217, IRCA 317, and IRCA 41), producing ten treatment combinations with ten replications. Observations were made for 12 weeks after pruning. The results showed that clone type and its interaction with propagation method significantly affected both parameters. Clone IRCA 317 exhibited the fastest shoot formation (1 week after pruning) and the longest shoot length in both propagation systems, indicating strong juvenile characteristics and superior vigor. Thus, IRCA 317 propagated via in vitro culture is recommended as a superior source of budwood for rubber propagation systems.

Purpose This paper aims to investigate the influence of Islamic marketing ethics and convergence marketing on competitive advantage and bank performance. Design/methodology/approach This study is based on a survey of 204 Indonesian branch managers from the Islamic banking industry. Results were produced with the partial least square approach. Findings Results revealed that Islamic marketing ethics and convergence marketing have sufficient confidence to have significant influences on competitive advantage, producing a positive association with a competitive advantage. However, Islamic marketing ethics and convergence marketing did not influence bank performance directly. Competitive advantage positively mediated the relationship. Furthermore, organizational digital literacy did not moderate the relationship between convergence marketing and bank performance. Research limitations/implications This study contributes to the conceptualization of convergence marketing and the identification of its effects on competitive advantage and bank performance. The identification of convergence marketing in this dissertation contains dimensions of mobile, security, foreign currency, holistic and interactivity as different aspects from the steps of Islamic banks to digitize their services to the internet in a single application. The results also indicate that convergence marketing does not have a direct effect on bank performance but has an indirect effect through competitive advantage. Convergence marketing must first create a bank advantage over its competitors to have a good effect on bank performance. Practical implications This study offers many opportunities for Islamic bank marketers to improve performance. Many Islamic banks currently do not implement Islamic marketing ethics consistently and thoroughly. The results of this study encourage Islamic banks by showing that the more intensive and consistent they are in implementing Islamic marketing ethics, the better their competitive advantage and the higher the performance. This effort can be done in various ways, such as offering tariffs/ratios of services transparently to customers, not exaggerating the benefits of the products offered to distort customer expectations, building brands that can strengthen customer confidence in Islamic banks and only offering products and services with high-quality standards. Limitation and future research This study uses a sample of Islamic banking so that it is still limited to certain types of banks. Future research needs to conduct model testing in different contexts such as conventional banking. In addition, further research needs to use the capabilities or capabilities of bank IT as a moderator in the effect of convergence marketing on bank performance. Future research also needs to control for more variables and use a scale that is more complex than the binary scale (for example, the percentage of share ownership or territory in the scope of the province or district/city). Originality/value This research views the Islamic bank competitiveness through the lenses of Islamic ethical theory and convergence marketing theory.

Deep-sea sedimentary hydrocarbonoclastic bacteria are still not widely used in the bioremediation field, especially for crude oil spill biodegradation. This study utilized a mixed culture of Raoultella sp., Enterobacter sp., and Pseudomonas sp. isolated from deep-sea sediment to determine the abilities of bacteria to degrade petroleum hydrocarbons while incorporating environmental variations in a microcosm study. The oil biodegradation extent was determined by measuring the remaining oil and grease in the sample vials. The highest percentage of biodegradation was 88.6%, with a constant degradation rate of 0.399 day–1. GC-MS analysis showed that the most degradable compound in the oil samples was paraffin. This study also observed that microbial degradation was optimized within three days of exposure and that degradation ability decreased at 35 °C. The salinity variation effects were insignificant. Based on all analyses, deep-sea sediment bacteria have great potential in oil spill biodegradation in a microcosm scale.

Little is known about the nature of ore fluid at the Sopokomil shale-hosted massive sulfide Zn-Pb deposit (North Sumatra, Indonesia). We therefore investigated its ore-fluid salinities, temperatures, densities, redox state, and pH using fluid inclusion microthermometry, sphalerite composition, and thermodynamic modelling. The fluid salinities and temperatures were ≈6 wt.% NaCl equiv and ≈165 °C, respectively, corresponding to an ore fluid less dense than seawater (≈0.96 g/mL). Sphalerite contains ≈9.9 mole% FeS in the stratiform ore and ≈3.4 mole% FeS in the feeder ore, suggesting a reduced fluid, which must have been acidic to be fertile. Such redox state and acidity invoke fluid dilution as the sulfide depositional mechanism. The bulk of the sulfides were precipitated in the early stage of mixing, within T = 165–155 °C. Key ingredients of sphalerite and galena at Sopokomil include (1) Zn that was primarily transported as ZnCl+, (2) Pb that predominantly occurred as PbCl2(aq), and (3) S that was largely supplied by marine sediment porewater. This study highlights the significance of a dramatic shift in thermal and chemical equilibrium induced by fluid dilution in the making of the first significant shale-hosted massive sulfide Zn-Pb deposit in Indonesia.

The International Conference on Geoscience and Earth Resources Engineering (ICGERE) is an annual event organized by the Faculty of Mining and Petroleum Engineering, Institut Teknologi Bandung. The conference serves as a collaborative platform for exchanging knowledge, developing new ideas, and advancing technological innovations. It provides opportunities for academics, professionals, policymakers, and students to discuss recent developments in geoscience and earth resources engineering and to explore future research and industrial directions.The 6th ICGERE (ICGERE 2024) was conducted in a hybrid format on 28–29 August 2024. The on-site sessions took place in Bandung, Indonesia, while virtual participation accommodated keynote speakers who were unable to attend physically. This conference proceeding comprises selected papers presented at the event and subsequently reviewed through a rigorous peer-review process consistent with IOP’s Peer Review Policy.The theme of ICGERE 2024, “Advancing Sustainable Futures: Innovations and Collaborations in Geoscience and Earth Resources Engineering,” reflects the conference’s commitment to addressing current challenges and opportunities in the field. The scope of presentations spanned a wide range of topics, including earth resource exploration, mining engineering, drilling and production engineering, oil and gas management, reservoir engineering, exploration and engineering seismology, global geophysics, metallurgical engineering, geothermal engineering, and hazard mitigation.List of The Organizing Committee is available in this PDF.

The purpose of this research is to know the influence of business strategy and Company size to a management control system. The sample in this research is Credit Union in West Java, with the amount of 33 Credit Union, which became an observation unit (respondent) in this research is Manager and Board. The result show to simultaneous as Business strategy and Company size affect the management control system. Business strategy affects management control system. Company size does not affect the management control system

The purpose of this paper is to analyze the effect of entrepreneurial marketing on competitive advantage and Islamic bank performance in Indonesia with the moderating role of vigilant leadership. We used a convenience sampling method to collect data from 204 Islamic bank branches in Indonesia. To test the hypotheses, we employed Smart-Partial Least Square (Smart-PLS) software. The findings indicate that entrepreneurial marketing directly or indirectly (through competitive advantage) influences bank performance. Vigilant leadership does not moderate the influence of entrepreneurial marketing on bank performance. Therefore, Islamic banks in Indonesia need to develop entrepreneurial marketing practices to increase their competitive advantage and bank performance. This study is the first to examine the effect of entrepreneurial marketing on organizational outcomes in Islamic banking and among the first to use vigilant leadership as a research variable in the banking context.

Heterotrigona itama is one of the stingless bee species with high potential for honey production and is widely cultivated in East Kalimantan, particularly in Samarinda. However, its domestication often faces challenges due to limited knowledge of forage management and the influence of microenvironmental factors on productivity. This study aims to examine the effects of floral resource availability and environmental conditions on the daily foraging activity, colony structure, and the productivity of honey and bee bread of H. itama in two meliponiaries in Samarinda. Data were collected from six colonies through direct observation of foraging behavior, pollen identification using the acetolysis method, and measurement of microclimatic parameters including temperature, humidity, light intensity, and wind speed. The results indicated that foraging activity followed a diurnal pattern, peaking at 11:00 a.m., with light intensity showing a very strong positive correlation with nectar collection activity (r = 0.95), while humidity was negatively correlated. A total of 108 plant taxa from 44 families were identified in both honey and bee bread samples, indicating that H. itama is a multifloral species. Wilcoxon tests revealed significant differences (p < 0.05) in pollen composition between the two sites. Honey and bee bread productivity were positively correlated with the proportion of worker bees (r = 0.65 and r = 0.72, respectively), and several plant species such as Nuxia sp. and Capsicum sp. were found to significantly contribute to production output. This study highlights that proper floral resource management and microclimate regulation are key factors in enhancing the productivity of stingless bees in tropical regions.

The rapid evolution of technology has reshaped the global economy, intensified competition, and prompted industry players to embrace innovation to maintain sustained competitiveness. In Indonesia, business incubators, overseen by universities and provincial/city governments, are pivotal. However, understanding the determinants of business incubator performance remains limited. This study investigates 24 statement items aiming to uncover the factors influencing technology business incubators in Indonesia, focusing on knowledge management as a mediating variable from a knowledge-based perspective. Employing a quantitative approach, structural equation modeling (SEM) is utilized to scrutinize these factors’ impact on business incubator performance. The findings reveal that knowledge management serves as a full and partial mediator among funding support, government assistance, incubator governance, and business incubator technology performance. This research offers valuable insights for entrepreneurs and stakeholders by emphasizing the significance of funding, governmental backing, incubator governance, and knowledge management in enhancing incubator business technology performance in Indonesia.

Indonesian's waste production continues to grow as the population increases. Organic waste such as leaves and food waste generally decomposes and can be composted simply with the use of barrels and buckets. Effective Microorganism 4 bioactivator can accelerate this process. This research was conducted to discover if addition of Tithonia diversifolia and chicken manure could increase the nutrients from liquid fertilizer and solid compost. Complete randomized design with 4 treatments and 4 replications was used as follows: A = 100% organic waste (control), B = 60% waste + 28% tithonia + 12% manure, C = 60% waste + 32% tithonia + 8% manure and D = 60% waste + 36% tithonia + 4% manure. The results showed that the addition of manure and tithonia increased N, P and K in liquid fertilizer. The highest increase in N and P occurred with treatment D, and K with treatment C.