Abstract:This research aims to find out how student learning outcomes differ in the Accounting Laboratory course based on previous educational background. The population in this sample is all 91 students who filled out the Googleform…
form provided. The sample size was obtained using the Yamane formula for the two independent variables, namely SMK with 40 students and SMA with 20 students. The type of research in this research is quantitative comparative using the independent sample t-test analysis technique, with the test carried out being a difference test of one group of samples (pairs). The results of this research are that there is no statistically significant difference between the learning outcomes of students with vocational/MAK backgrounds and the learning outcomes of students with high school/MA backgrounds. Keywords: Learning Outcomes, Educational Background
Abstract:This study aims to analyze the relationship and influence of coal quality parameters which include Total Moisture (TM), Ash Content (ASH), and Total Sulfur (TS) on Gross Calorific Value (GCV). The data used in this study…
is data from laboratory tests on 23 samples of Run Of Mine (ROM) coal at seam 16 at PT Unggul Nusantara, North Barito Regency, Central Kalimantan. Data analysis was performed statistically using the help of SPSS software through Pearson correlation test and multiple linear regression analysis. The results of the correlation test showed that simultaneously, the TM, ASH, and TS parameters had a very strong relationship with the GCV value with a correlation coefficient (R) of 0.893 and contributed an influence of 76.5%. Partially, Ash Content (ASH) had a very strong negative relationship (r = -0.881) and had a significant effect on calorie values (p = 0.000). Each 1% increase in ash content would decrease the GCV value by 68.249 Kcal/Kg. Meanwhile, Total Moisture had a significant positive relationship by simple correlation (r = 0.506, p = 0.014), but showed no partial significant effect in multiple regression models (p = 0.364). Total Sulfur was found to have a very weak negative relationship (r = -0.182) and had no significant effect on GCV values (p = 0.406). This study concludes that Ash Content is the most dominant parameter that affects the reduction of the caloric value of coal seam 16 at PT Unggul Nusantara.
Abstract:This paper presents the design and performance evaluation of a high-voltage direct current (DC) generator based on the Cockcroft–Walton (CW) voltage multiplier for laboratory-scale applications in electrical engineering.…
g. Conventional high-voltage generation methods often involve bulky transformers and complex circuitry, making them less suitable for compact and cost-effective laboratory use. To address these limitations, a modular CW-based system is proposed, integrating a high-frequency input source with an optimized diode-capacitor ladder network. The proposed system is designed to achieve high DC voltage output in the kilovolt range while maintaining acceptable levels of ripple and efficiency. Experimental results show that the system can achieve up to 86% of the theoretical output voltage under no-load conditions, with an efficiency of around 70.8%. Furthermore, the ripple voltage of the generated output voltage is very small, demonstrating stable performance suitable for laboratory applications. The proposed design offers a compact, cost-effective, and reliable solution for high-voltage DC generation, making it highly suitable for educational and low-power applications.
Abstract:Laboratory testing plays a crucial role in supporting patient diagnosis and monitoring; therefore, accurate and precise results are essential through the implementation of quality control (QC). Potassium level testing is…
one of the key parameters requiring robust quality control because it is closely linked to patients’ clinical conditions. This study aims to analyze the implementation of QC in potassium level testing using the EasyLyte device at the Kasih Ibu Hospital Laboratory in Surakarta. The research method used was quantitative descriptive with an observational approach using secondary data from QC results for the period from September to November 2025. Analysis was performed by calculating the mean, standard deviation (SD), coefficient of variation (CV), and evaluating the Westgard rules. The results showed that the CV values for normal and abnormal controls were within acceptable limits (≤5%), and no violations of any Westgard rules were found. This indicates that the test results have good precision and there are no deviations, either random or systematic. Overall, the analytical system is in control and the instrument performance is stable. Thus, potassium testing using the EasyLyte instrument meets quality requirements and is suitable for use in laboratory services, while still requiring QC monitoring as well as routine maintenance and calibration.
Abstract:The increasing threat of emerging and re-emerging infectious diseases necessitates the strengthening of the capacity of the Health Laboratory (Labkes) network, including Public Health Laboratories (Labkesmas), through the…
e availability of competent and standardized laboratory human resources (HR). Polymerase Chain Reaction (PCR) testing has become the primary diagnostic method for pathogen detection, both in routine services and in public health emergency situations. The development of a PCR training curriculum and modules by the Center for Health Biology Laboratory (BBLBK) represents a strategic step toward standardizing the competencies of laboratory personnel. This article aims to describe the urgency of implementing certified PCR training policies as part of a national system for enhancing the competence of health laboratory human resources. The writing method employs policy analysis based on document review and the framework of national health regulations. The analysis results indicate variations in laboratory personnel competencies, the absence of a national certification scheme, limited availability of trainers, and the need for continuous curriculum updating. Certified PCR training is therefore recommended as a national instrument for fulfilling competency standards in health laboratories. The integration of training into the health human resource development system, along with the strengthening of quality- and safety-based approaches, is key to the successful implementation of this policy.
Abstract:• X is a company engaged in non-construction oil & gas services, namely water base mud (polyamine based) management services, supply of chemical materials, laboratory equipment, and drilling fluid engineers for oil and gas…
gas drilling. problems encountered when drilling through formations containing reactive clay and shale which can cause swelling clay problems and formation damage. This problem can be overcome with a high performance water based mud (HPWBM) mud system which has a super shale inhibition (polyamine) component. Mud which is formulated with the concept of total inhibitor, has inhibitory properties that can stabilize mineral clay and shale. The of this final assignment are to identify and study the high performance water base mud (HPWBM) mud system, then to know the ratio of good polyamines to be used in the KCL polymer polyamine mud formulation, then to look for the value of the physical properties of the KCL polymer polyamine mud formulation. to meet the oil company spec. This test begins with testing the mud properties of the KCl polymer polyamine mud sample from PT. Mitra Mandiri Saktitama before being exposed to Temperature and after being exposed to Temperature. Then analyze the changes in the value of the mud properties that have been made and the specifications of their physical properties, so that they can look for changes in the values of the mud properties of KCl polymer polyamine mud that fall within the specified range of mud properties. This test is carried out under the conditions of a room temperature of 78-300°F.
Abstract:The objective of this study is to examine the management of water production residues and to analyze their implementation in environmental accounting at PERUMDA Air Minum Mutiara Tirta, Gorontalo City. This study employs…
a qualitative method with a case study approach. The research informants were selected using purposive sampling, consisting of individuals who were considered knowledgeable and directly involved in the issues under investigation, including the Production Coordinator, Maintenance Division, Laboratory Officer of Zone 1, Assistant Manager of Secretariat and Public Relations, and the Accounting and Budgeting Officer. Data were collected through interviews, observations, and documentation by applying data source triangulation to ensure data validity. The results indicate that the management of water production residues has been carried out in accordance with Standard Operating Procedures (SOPs); however, its effectiveness remains limited due to constraints in budget allocation, facilities, and waste treatment technology. In terms of environmental accounting implementation, the recognition, measurement, presentation, and disclosure of environmental costs have not been optimally integrated, as environmental costs are still recorded within general operational budgets without specific classification and detailed reporting. This condition reflects existing challenges in linking waste management practices with environmental accounting records. The main obstacles include limited technological capacity, insufficient human resources with expertise in environmental accounting, and the absence of specific regulations governing environmental cost recording. Therefore, clearer regulatory support, dedicated budget allocation, improved waste treatment technology, and employee training are required to ensure a more effective and sustainable implementation of environmental accounting.
Abstract:Laboratory examinations play an important role in supporting disease diagnosis and treatment, one of which is the measurement of uric acid levels. The accuracy of laboratory results is significantly influenced by the pre-analytical…
-analytical stage, including the type of blood collection tube used. Two commonly used tubes are the plain vacutainer and the clot activator vacutainer, each with different additives that may affect blood clotting time and test results. This study aimed to determine the differences in uric acid test results and clotting time using these two types of tubes. A simple experimental method with a comparative design was conducted at Klinik Pratama Rawat Jalan Mambal Medical Care from March to April 2025. The sample consisted of 15 respondents, each undergoing two blood draws using both tube types. The results showed that the average clotting time for the clot activator tube was 9.27 minutes, while for the plain tube it was 24.67 minutes. The average uric acid level measured using the clot activator tube was 5.27 mg/dL, compared to 5.14 mg/dL using the plain tube. Statistical analysis using the Wilcoxon signed-rank test indicated a significant difference in clotting time but no significant difference in uric acid levels (p > 0.05). It can be concluded that the use of clot activator vacutainer tubes accelerates the blood clotting process but does not significantly affect uric acid levels compared to plain tubes.
Abstract:Experiment purpose is to know the kinds, variety and dominance in Amahai Aerono Beach. This experiment was held in February 2017 using cuadran transect with plot size 10 x 10 for tree kind, 5 x 5 for stake kind and 2 x 2…
for seedling. Sample identify process in Center Laboratory of DEEP Sea Experiment (LIPI Ambon). Species variety is a community characteristic based on biological organization, while dominance is the parameter proving the species dominates in a community. In experiments found 7 kinds of mangroves, Rhizophora apiculata, Ceriops tagal, Bruguiera gymnorrhiza, Sonneratia alba, Aegiceras corniculatum, Bruguiera parviflora, and Avicennia officinalis. Included in lowly dominate and have medium characteristics.
Abstract:Obesity is a condition of abnormal or excessive fat accumulation which can be a risk factor for dyslipidemia. Uncontrolled dyslipidemia can directly cause endothelial dysfunction by increasing the production of free radicals,…
cals, causing Low Density Lipoprotein (LDL) oxidation and stimulating the release of inflammatory factors that can cause inflammation. Neutrophils and macrophages are the first leucocytes to appear in the early response to inflammation, so the neutrophil-lymphocyte ratio can be useful for evaluating the prognosis of inflammation as an early detector and as a marker of inflammation that can be detected simply and efficiently. This study aims to determine the correlation between Neutrophil-Lymphocyte Ratio (NLR) and Lipid Profile in adult patients with obesity in Prodia Tangerang Clinical laboratory. This study is an analytical study with a cross-sectional approach and used purposive sampling technique. The research sample data was taken from secondary data from patient medical records. The p-value obtained using Rank Spearman correlation from the comparation of neutrophil-lymphocyte ratio with each lipid profile value is total cholesterol (p=0.003), LDL cholesterol (p=0.013), High Density Lipoprotein (HDL) cholesterol (p=0.375) and tryglicerides (p=0.316). This study found a relationship between the neutrophil-lymphocyte ratio with total cholesterol dan LDL cholesterol, but there was no relationship between the neutrophil-lymphocyte ratio with HDL cholesterol and tryglicerides in obese adult patient in Prodia Tangerang Clinical Laboratory.