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This research explores the role of nanotechnology in enhancing energy storage systems for renewable energy applications. The study aims to evaluate the potential of nanomaterials, including carbon nanotubes, graphene, and fullerenes, in improving the performance of energy storage devices, specifically batteries, by focusing on their ability to enhance energy conversion efficiency, storage capacity, and battery lifespan. A case study was conducted using a prototype battery incorporating these nanomaterials, connected to a photovoltaic system to simulate real-world energy production conditions. The methodology included testing key parameters, such as energy conversion efficiency, charging time, and battery degradation through multiple charge-discharge cycles. The findings showed a significant improvement in energy conversion efficiency, with the nanomaterial-based batteries outperforming conventional batteries by up to 20%. Additionally, the nanomaterial-based batteries demonstrated an increased storage capacity and longer cycle life, maintaining performance after hundreds of charge-discharge cycles. Nanomaterials contributed to these improvements by enhancing electrical conductivity, reducing internal resistance, and preventing degradation that typically occurs in conventional batteries during prolonged use. Furthermore, nanostructured coatings on the electrodes were found to improve light trapping and anti-reflection capabilities, which directly contributed to the higher efficiency of the battery. This research highlights the transformative potential of nanotechnology in energy storage systems, offering a promising solution to the intermittency challenges of renewable energy sources such as solar and wind. The study also suggests that further research is needed to explore other nanomaterials, scale up the technology for industrial applications, and integrate smart energy management systems to optimize energy storage in renewable energy systems.

Archiving is a process or activity that starts from creation, receipt, collection, regulation, control, maintenance, care, and storage as well as evaluation according to a certain predetermined system. As time goes by and also the many activities that have been carried out at PT Pelindo IV (Persero) Balikpapan Branch, more and more archives have been created. The purpose of this study was to find out the causes of archive management and to find out the efforts made in overcoming obstacles to archive management in the HR and general division at PT Pelindo IV (Persero) Balikpapan Branch. The type of research used in this research is descriptive research with a qualitative approach in which data is collected through observations, interviews, and documentation. Based on the research results, several things can be improved for more efficiency and effectiveness in archiving 1) What can be improved is the system currently used. Pelindo IV (Persero) Balikpapan Branch, namely the system regarding this is quite good, it's just that in recovering it is still difficult to find because letters are in other classification sections such as payment archives in the information system classification. 2) Tools and equipment used in managing archives are wooden and glass cabinets. The arrangement is still disorganized because the order folders are just piled up. The archive storage space is too small so many archives accumulate and cannot be put in the cupboard. 3) There are still many archives whose duration of archive destruction is too long, considering the number of incoming documents or document production is quite high and quite a lot because archives that are old and no longer needed will be destroyed within a yearly period.

PT. Petrosida is a manufacturing company engaged in pesticide production. The production system in this company is Make To Order (MTO) where the company will produce products after an order or order from consumers. In its production PT. Petrosida has problems with the main tools used for packaging, one of which is a 1-liter induction semi-automatic filling machine in the herbicide unit, where treatment is carried out after damage to a component. Critical components in filling machines experience an average of 20 times damage in 2022-2023 and the machine maintenance process is still not optimal with an average downtime of 5 hours / month. Therefore, the purpose of research is to be able to carry out preventive maintenance using the modularity design method in the hope that there will be no more breakdowns that hamper the production process so as to reduce machine maintenance costs and to find out the minimum total machine maintenance cost planning using the life cycle cost (LCC) method. By implementing preventive maintenance with modularity design, the total maintenance cost of Rp. 9,747,782 is lower than the company's total maintenance cost of Rp. 23,023,176 with an efficiency rate of 42.3%. And obtained the lowest total life cycle cost of Rp. 340,459,348, - with an optimal life on the machine of 3 years & the number of mechanics one person.

Developments in the industrial world are increasingly rapid, resulting in increased competition in the industrial world, so that industrial companies are competing to improve production efficiency and effectiveness. Especially companies in the manufacturing sector, increasing productivity in a production system is an absolute thing that must be done. One of the main indicators in increasing productivity is the level of rehabilitation of production machines at the company. In measuring how good the rehabilitation of a production machine is, an effective and efficient maintenance maintenance process is needed for the company. Continuous use of the machine will decrease the level of readiness of the machine itself. In an effort to maintain the level of machine readiness so that production results are guaranteed due to continuous use of the machine, regular machine maintenance and maintenance activities are needed which are expected to prolong the condition of production machines so that they are not damaged, in case of machine damage it can disrupt production activities.

Efforts to increase income, provide employment, contribute to the availability of animal protein and increase production activities are part of food security in the aquaculture sector. Based on data reported from the DGT KKP Statistics, (2021) aquaculture can increase production activities, where in 2020 the third quarter of fish farming production reached 11.5 million tons and increased to 12.25 million tons in 2021 in the third quarter.  Alternative techniques that can be done as an effort to increase fish farming production results are optimizing the use of biofloc system technology (Pramono et al., 2018; Faridah et al., 2019 and Permana et al., 2021). This biofloc system is a union of living organic substances into the form of blobs, where this biofloc is composed of the word bio which means life while floc means blob. For example, in tilapia farming, to increase production results so that they can ... Meeting market demand can implement a biofloc system. Tilapia is classified as a type of freshwater fish that is in great demand in the market. The advantages of implementing a biofloc system in tilapia farming are environmentally friendly so that it is easy to carry out advanced cultivation, there is efficiency in water utilization, short maintenance period, and maximizing stocking density. In addition to the advantages, there are also obstacles faced, fish farming with a biofloc system such as lack of understanding of fish farming with the biofloc method, directly providing feed without paying attention and lack of water quality control. Furthermore, the research conducted implemented the observational descriptive method.