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Work accidents can be said to be a conflict in employment because they cause losses to workers and companies. Although the government has regulated the company's obligations in implementing occupational safety and health through various laws and regulations, in reality the effectiveness of the implementation of these regulations is still a problem, especially in terms of law enforcement in companies that have not fully implemented occupational safety standards according to applicable norms and provisions, one of which is at PT Sinar Semesta which is a metal casting company in Klaten Regency. This study aims to determine the regulations related to Occupational Safety and Health and the implementation of legal protection for Occupational Safety and Health at PT Sinar Semesta. This study uses an empirical legal research method. Based on the results of the study, it can be concluded that Occupational Safety and Health has actually been regulated in several laws and regulations. However, the implementation of legal protection for Occupational Safety and Health at PT Sinar Semesta has not been fully fulfilled because there are no health facilities specifically located in the company environment, the Occupational Safety and Health Management System has not been implemented, and the Occupational Safety and Health Development Committee has not been formed..

Background: Atherosclerosis is a chronic inflammatory cardiovascular disorder strongly associated with elevated low-density lipoprotein cholesterol (LDL-C) levels and serves as a major predictor of adverse cardiovascular events. This study aimed to investigate the relationship between inflammatory markers (adiponectin and TNF-α) and key biochemical parameters in atherosclerosis patients. Methods:  A case-control study was conducted on 60 participants (aged 40–65 years) recruited from private cardiac clinics in Fallujah, Iraq, between October and December 2024. Subjects were stratified into two groups: 30 atherosclerosis patients (diagnosed by specialists) and 30 age-matched healthy controls. Blood samples were collected, centrifuged, and analyzed for CRP, TNF-α, adiponectin, PAI-1, MDA, GSH, sodium (Na), and magnesium (Mg) levels using standardized biochemical assays. Statistical analysis was performed using SPSS, with significance set at *p* ≤ 0.001. Results: Atherosclerosis patients exhibited significantly elevated serum levels of CRP (2.21 ± 14.46 vs. 1.07 ± 7.76 mg/dL), TNF-α (15.14 ± 120.86 vs. 4.27 ± 65.16 pg/mL), PAI-1 (6.52 ± 0.82 vs. 2.02 ± 0.42 ng/dL), MDA (590.26 ± 29.64 vs. 155.52 ± 25.19 ng/mL), and Na (140.16 ± 1.18 vs. 125.46 ± 6.17 nmol/L) compared to controls (*p* ≤ 0.001). Conversely, adiponectin (0.18 ± 1.81 vs. 0.67 ± 4.18 mg/dL), GSH (22.79 ± 1.37 vs. 40.81 ± 3.05 μg/mL), and Mg (1.46 ± 0.175 vs. 1.84 ± 0.67 nmol/L) were markedly reduced in patients. ROC curve analysis demonstrated perfect diagnostic accuracy (AUC = 1.0) for CRP, TNF-α, and adiponectin in distinguishing patients from controls. Conclusion: The study highlights pronounced dysregulation of inflammatory, oxidative, and metabolic pathways in atherosclerosis, with CRP, TNF-α, and adiponectin serving as robust discriminative biomarkers. These findings underscore the potential of targeting these pathways for therapeutic intervention and early diagnosis.

The utilization of clam shells as adsorbents has attracted considerable attention due to their ability to adsorb contaminants such as heavy metals, hazardous substances, and oil. Clam shells, which are composed mainly of calcium carbonate (CaCO₃), possess a porous structure that favors adsorption. Calcium carbonate imparts alkaline properties that neutralize acidic effluents and promote the formation of precipitates. Physical and chemical modifications can enhance the surface area and porosity of the shell, thereby enlarging the active sites for contaminant sorption. Clam shells heavy metals such as Pb, Cd, Hg, organic substances and can be used for oil spill remediation due to their hydrophobic and oleophilic properties. The calcination process converts the shells into a material that contaminants such as TSS, COD, and BOD. This utilization not only mitigates pollution but also creates opportunities for adsorbent products with economic value, especially in coastal areas where shell waste is abundant. However, this application must take into account ecological and health impacts, as overharvesting and non-environmentally friendly processing can damage the ecosystem. A sustainable approach with environmentally friendly regulations and technologies is essential to maximize the benefits of clam shells as adsorbents.  

The Majapahit Museum houses a significant collection of tosan aji, particularly keris, which holds important historical, technological, and symbolic value within Javanese culture. However, a substantial portion of the collection lacks clear provenance and stratigraphic context, resulting in data gaps and potential misinterpretations, especially regarding Majapahit-period attribution. This study aims to examine strategies for managing non-stratigraphic keris collections through standardized visual-morphological identification as an initial curatorial approach. The research employs direct artifact observation, morphological analysis of blades and ricikan, visual examination of pamor configurations, and a review of museological, keris studies, and archaeometallurgical literature. The findings demonstrate that standardized morphological identification provides a systematic framework for preliminary classification while preventing speculative chronological claims. The study also emphasizes the necessity of separating blade analysis from keris fittings and highlights the limitations of visual assessment in determining tangguh, which requires support from non-destructive metallurgical analyses. As a practical contribution, this article proposes strengthening curatorial standards through the development of morphology-based artifact labels (manual and digital), multidisciplinary scholarly catalogues, and the integration of documentation and material analysis technologies. This approach positions the Majapahit Museum as a knowledge-producing institution in tosan aji studies rather than merely a repository of artifacts.   Kata Kunci : Museum Majapahit, Keris, Identifikasi Morfologis, Ricikan, Tangguh Keris

Grade A steel plates are commonly used in marine and offshore structures due to their high corrosion resistance. This study investigates the effect of bevel angle variations (30°, 40°, and 50°) and the use of ceramic backing on the mechanical properties and welding defects of Grade A steel using the Shielded Metal Arc Welding (SMAW) method. Welding was conducted with four-pass multipass welding. An experimental approach was employed, including macro visual inspection, dye penetrant, tensile, and impact testing. Results showed that specimens without ceramic backing (P1) had more defects such as incomplete penetration and spatter compared to those with backing (P2). All specimens met ASTM E23 impact standards (average 23.9–24.1 J/mm²). Tensile tests revealed that ceramic backing improved strength, with the highest UTS (576.1 MPa) and elongation (25%) found.

One of the negative impacts of the mining process is acid mine drainage which is formed from the oxidation of minerals containing iron sulfur, such as pyrite (FeS2) and pyrothite (FeS) by oxidizers such as water and oxygen. To handle or control acid mine drainage, one way is to use activated carbon or often referred to as activated charcoal, which is a type of carbon that has a very large surface area. Charcoal is a porous solid that contains 85% to 95% carbon, produced from materials containing carbon by heating at high temperatures without oxygen (pyrolysis). Activated carbon made from palm shells is an adsorbent that can be used to treat coal mine acid water, so that the water meets standards for flowing into the environment. This study used concentration variants of 4 grams, 6 grams, 8 grams and contact times of 30 minutes, 60 minutes and 150 minutes. The results of this study show that the concentration of palm oil shell activated carbon adsorbent influences the reduction of iron (Fe) and manganese (Mn) metal levels as well as the pH conditions in acid mine drainage water. The higher the concentration and the longer the contact time, the more heavy metals are adsorbed, the contact time is the highest. The optimal concentration in this study was 150 minutes and the optimal concentration was 8 grams with physical activation.

This study uses a qualitative approach that describes the object studied through the process of exploring facts and data on objects in the field as they are, to achieve these objectives, data is needed that is excavated from an in-depth observation process with the principal, vice principal, head of the welding and metal fabrication engineering expertise program and teachers of productive subjects. Data collection techniques using in-depth interviews with, participant observation, and documentation. Data analysis techniques using data reduction, data presentation and drawing conclusions or verification. Checking the validity of the data using triangulation methods. The results of the study indicate that the suitability of students' technical and non-technical competencies with industry needs greatly determines the success rate of graduates in the workforce. Relevant competencies, such as mastery of modern welding technology and soft skills such as communication and teamwork, are key factors. In addition, it was found that aligning the curriculum with industry standards and the active involvement of industry partners through internship programs contributed significantly to improving the quality of graduates. This study recommends strengthening cooperation between vocational schools and the industrial world and developing training programs based on labor market needs.

Background: As you get older, health problems increase, one of which is stress. Stress is very important because stress will have an impact on the quality of life and psychological well-being of the elderly. Psychological well-being in the elderly is the elderly's ability to accept themselves as they are, be able to build positive relationships with other people, be able to independently face social pressure, master the environment, have a purpose in life, and be able to realize one's potential in a sustainable manner. Stress in the elderly can describe that a person experiences a decrease in psychological well-being in the elderly which can be said to be low. Objective: This research is to analyze the relationship between stress levels and psychological well-being in elderly people at the Pucang Gading Semarang and Wening Wardoyo Ungaran Elderly Social Service Homes. Method: This research is a type of correlational quantitative research using the cross-section method. The sample taken in this study was 105 elderly people who were in the Pucang Gading Semarang and Wening Wardoyo Ungaran elderly service homes. The instrument for measuring stress levels and psychological wellbeing in the elderly uses a questionnaire. The test used in this research is the Gamma test. Conclusion: There is a relationship between stress levels and psychological wellbeing in the elderly at the Pucang Gading Semarang and Wening Wardhoyo Ungaran Social Service Homes for the Elderly.

This research aims to determine the effect of the level of website-based disclosure of company information on corporate tax avoidance behavior. The objects in this research are all companies listed on the Indonesia Stock Exchange for the period June 2024. Data collection in this research uses content analysis methods and data processing using the SPSS application. The sampling technique in this research used purposive sampling with a final sample size of 399 companies. The research results show that the level of website-based disclosure of company information has a negative and significant effect on tax avoidance behavior in public companies in Indonesia. 

Agricultural tools are important for agrarian communities. However, for some people in Banyumas Regency, Central Java, very few people have businesses in the agricultural tools sector. In fact, this can be a promising business opportunity. Knowledge about making blacksmith agricultural tools is generally obtained from generation to generation. Some blacksmiths in Banyumas generally only produce agricultural tools such as kudi and work machetes, because the need for these tools never stops, is always needed by farmers or workers, and the equipment produced does not require high design, even tends to be monotonous because the main thing is its function as work equipment. That is why Science and Technology for the Community (IbM) was implemented at the Pandai Besi Kirso production house on November 6, 2025, as a method of increasing production. IbM was continued with training in techniques for selecting raw materials, making potions that can improve the quality of iron, and making a variety of new products with high quality both in terms of strength and aesthetics. It was identified that agricultural tool craftsmen generally (1) Have limitations in equipment, (2) Lack expertise in metal blending, (3) Lack of innovative product variations, not only quality but also unique ethnic ones and (4) Low management quality. The implementation of IbM is expected to be able to minimize the problems of agricultural tool craftsmen's businesses, so that the blacksmith craftsmen's community businesses can develop and have a positive impact on the existence of MSMEs in Banyumas Regency.

This research aims to find out and describe the technique of playing flamenco guitar in the song Fiebre by Benjamin Woods. This type of research is descriptive qualitative research, with which this research will describe, describe and describe the flamenco guitar playing technique in the song Fiebre by Benjamin Woods. The object of research which is the center of attention and target of this research is the flamenco guitar playing technique in the song entitled fiebre by Benjamin Woods. The instrument in this research is the researcher himself, assisted by several tools to process the data. Get the sheet music for the song Fiebre with a flamenco guitar transcription adapted directly from the documentation of the performance of the song Fiebre by Benjamin Woods which was published on April 21 2020 on Benjamin Woods' official YouTube channel. The types of data used are primary data and secondary data. The steps for analyzing data are observation and documentation which are organized and interpreted as finding material to answer research problems. The results of the research show that the flamenco guitar playing techniques used in fiebre songs are picado, tirando, golpe, arpeggio, alzapua, and rasgueo. Benjamin Woods also uses a technique that was engineered by Benjamin Woods himself, namely the rasgueo abanico technique. This technique emerged because of Benjamin Woods' musical journey, which had a background in heavy metal music, which then made him want to present a sharper sound character with the rasgueo abanico technique.

The presence of heavy metals in waste is one of the variables that can pollute and damage the environment. Lead is one of the chemical contents that can be found in hospital liquid waste. Hospital liquid waste comes from work unit processes throughout the hospital environment which contains dangerous chemicals so it needs to be processed before being discharged into the environment. Research has been carried out using the coagulation-flocculation method using sugar palm seeds as a biocoagulant. The aim of this research is to find out how the palm seed coagulant mass influences in reducing lead (Pb) levels. hospital wastewater with the addition of variations in coagulant mass, namely 0.3%, 0.4%, 0.5%, 0.6% and 0.7%. From the filtrate resulting from coagulation-flocculation which was then analyzed based on the Regulation of the Minister of Environment and Forestry of the Republic of Indonesia Number P.68 of 2016 concerning Domestic Wastewater Quality Standards, from the results of this research it is known that sugar palm seeds as a biocoagulant are able to reduce the most optimal PB concentration when the coagulant concentration is added to 0.6%.

This research aims to optimize the operating conditions of nickel-chrome electroplating to increase the corrosion resistance of L profile steel materials. Nickel-chrome electroplating is a metal coating method used to protect steel surfaces from corrosion and improve the aesthetic appearance. The electroplating process involves several variables such as solution concentration, temperature, current density, and plating time. In this research, various operating conditions were optimized to obtain maximum corrosion resistance. The experimental method was carried out with variations of these parameters and the results were evaluated using corrosion tests and microscopic analysis. The research results show that certain operating conditions produce a protective layer that is more effective in preventing corrosion on L profile steel. This optimization is expected to make a significant contribution in industrial applications that require high corrosion protection.

Complexometry titration is a titration based on the formation of complex compounds between cations and complex forming substances. Complexometry is the formation of colored complexes by metals using standard solutions. The purpose of this study was to determine the percentage of levels in calcium lactate samples. According to the pharmacopoeia edition VI calcium lactate tablets contain no less than 94.8% and no more than 186%.  The results obtained from the determination of calcium lactate levels using the Complexometry titration method obtained a level result of 74.68%

This study aims to examine the effect of tax planning, tunneling incentives, and foreign ownership on transfer pricing practices in manufacturing companies listed on the Indonesia Stock Exchange (IDX) for the period 2019–2023. Using a quantitative approach and panel data regression method, this study analyzes secondary data from the company's annual financial statements. The results of the study indicate that tax planning has a significant positive effect on the company's decision to carry out transfer pricing. Meanwhile, tunneling incentives and foreign ownership are proven to negatively affect transfer pricing, although with variations in influence that are not too large compared to other variables. This study provides an important contribution in understanding the factors that influence transfer pricing policies, which can be a reference for policy makers, company managers, and researchers in better tax management.

This research aims to determine calcium lactate levels using the complexometric titration method, which involves the formation of a complex between metal ions and ligands, specifically using EDTA   (Ethylenediaminetetraacetate) as a titrant. The sample was dissolved in distilled water, the murexide indicator was added, and titrated with complexon III solution until the color changed from orange to violet as a marker for the end point of the titration. Data analysis shows that the percentage of calcium lactate levels in replication (1) is 93.32%, replication (2) 101.60%, replication (3) 95.93%, replication (4) 103.78%, replication (5) 109.02%, replication (6) 87.87%, replication (7) 95.93% and replication (8) 100.95%, and the percentage obtained the average purity is 98.55%. However, replications 5 and 6 did not comply with the standards of the Indonesian Pharmacopoeia VI edition (94.0–106.0%). This research shows that the complexometric titration method is effective in determining calcium lactate levels with good accuracy, as long as it is carried out with appropriate procedures and strict control of the analysis conditions. 

The design of a family room with a contemporary concept aims to create a comfortable, functional, and aesthetic space according to the needs of the user. The contemporary concept prioritizes a simple, clean, and flexible design by combining modern materials such as glass, metal, and concrete with natural elements such as wood and stone. The selection of neutral colors is combined with bold color accents to give a dynamic impression. The layout of the room is designed to be efficient with comfortable circulation and the use of minimalist and multifunctional furniture. Natural lighting is maximized through the use of large openings, supported by warm artificial lighting to create a comfortable atmosphere. The integration of smart home technology is also applied to increase the comfort and ease of use of the space. The design results are expected to produce a family room that is modern, functional, and supports interaction between family members.

Indonesia is a country with abundant gold minerals and it is quite economical to mine. Processing gold minerals is very important to increase gold content, one of the methods used is flotation. Reagent knowledge test in gold ore flotation was carried out to obtain certain mass recovery and metal recovery. In this study, the reagents used were 621 (activator), 530X (frother), and several collectors, namely collector type 1, namely 4000, collector type 3, namely X2, and the reagent test used a varied collector on collector 2, namely with reagent 7042; 7042A; 7042W and without using collector 2. Optimal % mass recovery and % metal recovery results using a variation of collector 2 reagent in the form of 7042 which produces a high recovery value of 4.19% in the final concentrate and a high metal recovery of 85.73%

Fish is one type of aquatic product widely used by the community because of its advantages as a food ingredient, including a source of important nutrients such as protein, vitamins, fat, and minerals. Fish is often found in cans. Canned packaging contains the heavy metals lead (Pb), cadmium (Cd), and zinc (Zn), which can be released into food due to the long storage period. This study aims to identify and analyze heavy metals Pb, Cd, and Zn levels in canned tuna with an expiration date of less than 1 year. Samples of canned tuna came from five different brands. Qualitative analysis used color reagents, while quantitative research used an atomic absorption spectrophotometer (AAS). The qualitative study results showed that three samples of tuna contained heavy metals. Samples B and C were positive for Pb metal, while samples A and B were positive for Zn metal. The concentration of Pb metal was measured in sample B at 117.9 mg/Kg and in sample C at -0.0147 mg/Kg. The concentration of Zn metal in sample A was -0.0048 mg/Kg, and in sample B, it was -0.147 mg/Kg.  

PT. Polyplex Films Indonesia is a manufacturer of Metallize Film products. This polymer film is coated with a tiny aluminum foil coating, giving it a bright metallic appearance. Metalized film materials have extensive use in decoration, food packaging, and specialized uses, including insulation and electronics. The production results of metalized film production show that in the most recent year, 2022, the number of defects was 1.6%, which is higher than the tolerance limit the company set at 0.5% of total annual production. Maintaining the consistency of the quality of the metalized film products that the company produces is much easier. The number of defects settled by the different types: Heat line accounts for 42% of the defects, pinhole accounts for 31%, and Star sky accounts for 27%. The company employs the PDCA method to mitigate issues in the production line. The implementation results demonstrate that the PDCA method has led to a reduction in the number of defects. Specifically, the Heat Line defects decreased from 274 tons to 57 tons, representing a decrease of 79.19%. Similarly, the Star Sky defects decreased from 178 tons to 85 tons, resulting in a reduction of 52%. The pinhole defects decreased from 202 to 51 tons, indicating a 74.8% decrease. The findings of this study should deepen our understanding of how the PDCA technique actually works to enhance product quality. This is because the changes are produced during the action phase, allowing for long-term retention of the gains. Product recommendations for additional investigation include PET (polyethylene terephthalate), BOPP (bi-axially oriented polypropylene), and CPP (cast polypropylene) films.