International Journal of Science and Environment (IJSE)

The Influence of School Principals' Transformational Leadership and Teachers' Self-Efficacy on Teacher Performance at SMP Negeri 1 Tomohon

2025-04-15T07:11:18+00:00

This study aims to analyze the influence of transformational leadership of school principals and teacher self-efficacy on teacher performance at SMP Negeri 1 Tomohon. Employing a quantitative approach, data were collected through a survey involving 68 teachers using valid questionnaires. The analysis was conducted using SPSS, encompassing normality, linearity, and regression tests. The results indicate a significant influence between transformational leadership and teacher performance, with a correlation coefficient of 0.672. Teacher self-efficacy also made a positive contribution, evidenced by a significance value of 0.001 and a t-statistic of 6.107. Simultaneously, both variables explained 52.9% of the variance in teacher performance (R² = 0.529). These findings suggest that enhancing transformational leadership and teacher self-efficacy can improve the quality of education at SMP Negeri 1 Tomohon, serving as a reference for educational policymakers in formulating effective strategies.

Construction of Drug User Identity at South Sulawesi BNNP Rehabilitation Center

2025-05-08T16:54:13+00:00

This study aims to determine: 1) how the construction of drug user identity is formed and developed in rehabilitation centers 2) how the self-identity of drug users in the community 3) how the role of the environment on the self-identity of drug users. The type of research used is qualitative research with a descriptive approach. The number of informants consisted of 12 people, with the criteria namely: 1) clients who undergo outpatient treatment at BNNP South Sulawesi 2) counselors at BNNP South Sulawesi. Data collection techniques used were observation, documentation, and interviews. Data validity check is done by a member check. Data analysis is data condensation, data presentation, and conclusion. The results of the study found that the construction of the identity of drug users was strongly influenced by their environment, this research occurs that many clients who use drugs because of the incitement of friends and environmental influences and an important point that BNNP be the vanguard to make the clients recover productive and functioning socially in society

Study Of Coffee-Based Agroforestry Systems In Community Forests

2025-04-07T11:25:24+00:00

Climate is an important factor in the growth and productivity of coffee plants. This research aims to determine the climate conditions regarding the use of shade on the development and productivity of coffee plants. This observation was carried out on agroforestry coffee plantations in Kare District, Madiun Regency. The coffee plants observed were 4 to 6 years old, and the shade used in the observations was Gamal, Dadap, and Sengon trees. Thus, based on the results of observations carried out over four months, it was found that the highest results were in Sengon stands, with an average of 27.2-27.7°C in January and March in terms of air temperature. Meanwhile, the highest observed humidity occurred in the first month and January at 76%. The highest wind speed occurs in April at 4 -5 km/hour. The highest intensity of light produced occurs in April at 8005 LUX. The results of these observations prove that the use of shade plants does not significantly affect the production and growth of coffee plants.

Phytoplacton Community In The Asahan River As A Fish Cultivation

2025-04-28T06:42:14+00:00

This study aims to analyze the structure of the phytoplankton community in the Asahan River. Using a descriptive survey. Determination of the location of phytoplankton sampling was carried out by purposive sampling. The results showed that overall phytoplankton were found in three divisions Crysophyta, Cyanophyta and Chlorophyta and 17 genera. The highest relative abundance (KR) was found in the genus Pediastrum of 12.7 with a diversity index of an average of 2.39, an evenness index of 0.35 and a dominance index of 0.16. The results of the physical factor measurements are an average turbidity of 3.53 NTU, an average water temperature of 32oC and an average water pH of 6. The results of the average water chemical factor measurements are water DO of 5.15 ppm, BOD = 1.85 ppm, COD = 26.45 ppm, CO2 levels = 18.29 ppm and mercury (Hg) levels measured range from 0 - 0.05 ppm. In conclusion, the abundance of phytoplankton is in the low category with a moderate diversity index and the waters are classified as stable.

Identification Of Sorgum Distribution And Soil Nutrient Status In Local Sorgum Genotype Growing Locations In North Sumatera

2025-05-02T08:28:11+00:00

Sorghum, a drought-resistant cereal crop, has great potential to support food security in North Sumatra. To optimize its utilization, identification and characterization of local sorghum varieties are needed. Identification of local sorghum plants is an important step in efforts to optimize the utilization of plants that are useful for helping to document and preserve biodiversity, can help reveal hidden potential, so that superior varieties can be developed. Farmers can choose the varieties that best suit their agronomic conditions and needs so that they can help open up new opportunities for product development and downstreaming of sorghum, thereby increasing its economic value. By developing and utilizing local sorghum varieties, Indonesia can reduce dependence on food imports and strengthen its food sovereignty Data collection was carried out from August to December 2022 in several regencies/cities in North Sumatra based on information sources from the agricultural service, farmer groups and communities who know about sorghum cultivation. This study aims to collect soil samples in sorghum plantations in various regions in North Sumatra. The soil nutrients in local sorghum growing locations vary, in terms of soil pH content, almost all locations fall into the acid criteria, the soil N content falls into the low criteria, and the soil P content is very low.

Legal Analysis of Default in House Building Contract Agreement

2025-05-08T16:52:23+00:00

Building contracting is an act in which one party gives work to another party as a contractor to complete a building. Obstacles in practice in the field often occur so that there is a discrepancy in the agreement that has been agreed between the parties. To protect the parties, a building contracting agreement is needed so that there is a binding between the two parties. If one party cannot fulfill the performance (default) according to the agreed agreement, then the party who does not receive the performance from the other party can file an objection or even a lawsuit in court if no peace is reached between the parties. A contracting agreement is a reciprocal agreement between rights and obligations, in which there is an agreement between one party, namely the contractor, who binds himself to carry out the work, while the other party who contracts, binds himself to pay a predetermined price. With research that uses a normative legal approach, this study aims to determine the legal consequences of default for contractors in a house building contracting agreement.

Production Of Acid-Activated Bleaching Earth From Bentonite Clay For Edible Oil Bleaching

2025-03-16T05:41:17+00:00

The main aim of this study was to produce acid-activated bleaching earth from bentonite clay for edible oil bleaching, which is a clay mineral that can be used in its natural or acid-activated states to clarify and reduce the colour intensity of fats and edible oil. This study was conducted in two stages. The first involved the characterization of activated bentonite clay (moisture content and bulk density determination) and choosing an effect on acid-activated bleaching earth performance by considering the significant parameters, which are sulfuric acid concentration (1, 3, 5M), bleaching time (25, 40 and 60min) and dosage of acid-activated bleaching earth per millilitre of impure edible oil (1.5, 4.5, 6g). The raw bentonite clay acquired from Afar Bentonite Mineral Mining Plc. was activated by diluted sulfuric acid at a temperature of 90℃, neutralized, and the impure edible oil was prepared. A 3M acid concentration at a bleaching time of 40 min and 4.5 g of acid-activated bleaching earth dosage resulted in the highest percentage of colour reduction, which was 97%. In general, the findings of this study support the notion that bentonite clay is an effective adsorbent for edible oil bleaching. This study has strengthened the idea that acid-activated bentonite can eliminate pigments that are the result of different impurities, while also reducing the health impact of unqualified edible oil products.

Physical Properties Of Ultisol Soil In Pangkatan Sub-District With The Provision Of Organic Material Types

2025-05-14T00:54:49+00:00

This study entitled the provision of various organic materials on physical properties and ultisols in Pangkatan Sub-District Labuhan Batu Regency which was carried out in the experimental garden at the Labuhan Batu University campus, North Sumatra. This study aims to determine the best type of organic material to improve the physical properties of ultisol soil from the Rantau Selatan land at the Labuhan Batu. This study used a non-factorial randomized block design (RBD) with a treatment factor of 8 types of organic matter and 3 replications so that there were 27 experimental units. L₀ Treatment: Control, L₁: Palm oil solid waste, L₂: Sugar factory waste, L₃: Fish waste, L₄: animal feed waste, L₅: Chicken manure, L₆: Cow manure, L₇: Leguminose compost, L₈: Compost organic waste fertilizer Medan city with a dose of each organic material 150g / 10 kg TKO. After incubation, bulk density (g /cm³) was taken using the Ring Sample method, Total Pore Space (%) with soil particle density and permeability (cm/hour) using the De Bootd method. Research Results Giving fish waste has the highest significant effect in improving soil physical properties such as reducing soil bulk density, namely 1.02 g / cm³, and increasing the total soil pore space by 61.63%, while the highest soil permeability is obtained in the treatment of animal feed waste, which is 60.22 cm. hour while the lowest was in the Control treatment of 29.11 cm/hour.

Legal Aspects of Seller's Liability in a Sales and Purchase Agreement with an Installment Payment System

2025-05-14T00:56:19+00:00

System Installment payment system in a sale and purchase agreement has become a common practice in modern trade transactions that require a clear legal basis for the payment of installments. modern trade transactions that require a clear legal basis to protect the rights of the parties. protect the rights of the parties. This research aims to examine the legal aspects of legal aspects of seller liability in a sale and purchase agreement with an installment payment system. installment payment system. This study elaborates on the details of civil law in installment payments, investigates the legal implications for consumers. installment payments, investigates the legal implications for consumers and sellers, and analyzes how the seller's liability can be enforced in the framework of the applicable civil law in Indonesia, particularly when there are default or dispute between the parties. The research uses the method of normative juridical method with a statutory approach and conceptual approach, analyzing various primary and secondary legal sources related to installment payment system. The results of the research show that the seller's liability in the installment payment system has a complex legal basis based on the Civil Code, especially Article 1. complex legal basis based on the Civil Code, especially Articles 1320 and 1338 which emphasize the validity of the agreement. 1338 which emphasize the validity of the agreement and the principle of good faith. LAW Consumer Protection Law strengthens this aspect of seller liability by emphasizing consumers' rights to transparent information and product quality assurance. product quality. In the event of default, the seller may be subject to sanctions in the form of compensation which includes costs, losses, and interest.