USU-IR Repositori Institusi Universitas Sumatera Utara
Not a member yet
100433 research outputs found
Sort by
Spatial Pole Analysis of Orangutan (Pongo abelii) Nesting Pohon Distribution in Halaban Restoration Area Sei Betung Resort Langkat District
No full textNests are a key element in Orangutan ecology, serving as a resting, breeding, and protection place. In Orangutans, nests are one of the most important evidences to see their presence in an area. This study aims to analyze the spatial pattern of the distribution of Orangutan nest trees (Pongo abelii) in the Halaban restoration area, Sei Betung Resort, Langkat Regency, as an effort to support Orangutan habitat conservation strategies. This study was conducted in January 2025. Based on the results of the study, 29 Orangutan nest points were found at the research location. Modeling was carried out using the Maximum Entropy (MaxEnt) method to predict the suitability of Orangutan nest habitat. The results showed that the elevation factor contributed the most to habitat suitability (44.1%), followed by distance from the river, slope, land cover, and Normalized Difference Vegetation Index (NDVI). The Area Under Curve (AUC) value of the suitability of Orangutan nest tree habitat was 0.837 which can be classified as a good model. The distribution of nest trees tends to cluster (Crowd) in certain areas. The nest trees found were mostly also food trees, confirming the close relationship between nest location and food resource availability.63 PagesSkripsi Sarjan
The Contribution of Digitalization, Road Infrastructure, and Fiscal Allocation in Enhancing the Output of Micro and Small Industries: A Perspective from Sumatera
No full textMicro and Small Industry (IMK) play a strategic role in Indonesia's economy, particularly in providing employment and driving regional economic growth. However, their contribution to the Gross Regional Domestic Product (GRDP) in Sumatra remains relatively low, with a much smaller output proportion compared to medium-sized enterprises. The role of society as human resources and the government as policymakers is crucial in enhancing IMK productivity through aspects such as digitalization, infrastructure development, and fiscal allocation. Digitalization improves production efficiency and market expansion, while road infrastructure influences the mobility of production factors, and fiscal allocation aims to support sectoral development, though its effectiveness needs further evaluation. Thus, this study aims to assess the contribution of digitalization, road infrastructure, and fiscal allocation in increasing the output of Micro and Small Industries across 10 provinces in Sumatera from 2017 to 2023.
This study employs a quantitative research approach using secondary data published by Statistics Indonesia (BPS), the Ministry of Public Works and Housing (PUPR), and the Directorate General of Fiscal Balance (DJPK). The digitalization aspect is proxied by the ICT Access & Infrastructure Index (IAI) and the ICT Usage Index (IP). The road infrastructure aspect is represented by the Total Road Length (TPJ) and the Road Quality Length (PKJ). Meanwhile, fiscal allocation is proxied by the Special Allocation Fund for Cooperatives and MSME Capacity Building (DAK). The analysis technique used in this study is panel data regression, with the Random Effect Model (REM) as the selected model.
The results show that, partially, the variables IAI, IP, and TPJ have a positive effect on IMK output, while PKJ and DAK have a negative effect. Simultaneously, all variables have a positive and significant impact on IMK output across 10 provinces in Sumatera from 2017 to 2023.118 PagesSkripsi Sarjan
The Influence of Income Cigarette Prices and Dependency Ratio on Cigarette Consumption in Indonesia
No full textThis research is motivated by the high level of cigarette consumption in
Indonesia, which negatively impacts the economy and public health. The study
aims to examine the influence of income, cigarette prices, and dependency ratio
on cigarette consumption in Indonesia.
This study uses a quantitative approach with panel data covering the
period 2019-2023 for 34 provinces in Indonesia.. The Random Effect Model
(REM) was employed to analyze the influence of income, cigarette prices, and
dependency ratio variables. The data were analyzed using Eviews 12.
The findings indicate that income, cigarette prices, and dependency ratio
simultaneously have a significant effect on cigarette consumption in Indonesia.
The income and dependency ratio variables negatively but insignificantly affect
cigarette consumption, whereas cigarette prices positively and significantly
influence it. This study concludes that cigarette consumption in Indonesia is
influenced by economic and social factors, necessitating comprehensive policy
strategies and education to reduce cigarette consumption in the country.80 PagesSkripsi Sarjan
Characteristics of Microplastics in Water in Coastal Areas of Sumatra Island
No full textMicroplastics are small pieces of large plastics that measure 1-5 mm and become a type of marine debris that becomes an obstacle because of its very small size and can be consumed by marine biota. This study aims to determine the characteristics of microplastics based on type, size, color and polymer and their distribution in water in the Coastal Region of Sumatra Island. The research method was carried out by purposive sampling by selecting 10 research locations. The data analysis method uses the comparison between the number of microplastic particles and the amount of filtered water (m³). The results found 5 types of microplastics, namely fragments, fibers, films, foam and pellets. The most microplastic color found is black as many as 1504 particles. The largest size of microplastics in the size range of 1000-2000 μm, as many as 1108 particles. The polymer constituent of microplastics most often found at the research site is Nylon polymer. The distribution of microplastics was highest in the Belawan area with an abundance of 4.94 particles/m³.65 PagesSkripsi Sarjan
The Impact of System Quality, Information Quality, and Services Quality on User Satisfaction of Accounting Information Systems (Study on Users of The Tokopedia E-Commerce Application)
No full textThis research aims to determine the effect of system quality, information quality and service quality on user satisfaction of accounting information systems by conducting studies on users of the Tokopedia application. The type of research used is the cause and effect research. The research uses primary data obtained by distributing questionnaires to undergraduate students of Accounting Study, Program Faculty of Economics and Business, Universitas Sumatera Utara. The analytical techniques used are double linear regression and data processed using SPSS. The results of the research show that the system quality, information quality and service quality simultaneously and partially have a positive and significant impact on user satisfaction of the accounting information system.102 PagesSkripsi Sarjan
The Histology of the Male Mice Testicles (Mus musculus L.) Exposed to the Cigarette Smoke and Given by Chinese Betel Leaf Extract (Peperomia pellucida L.)
No full textChinese betel leaf extract has the potential to omit the free radicals due to its antioxidant activity. The aim of this study was to determine the efficacy of Chinese betel leaf extract on the morphology and histology of the teste of male mice (Mus musculus L.) exposed to cigarette smoke. This study used a completely randomized design (CRD) with 6 treatments and 4 replicates. Negative control was normal mice treatment, followed by positive control exposed of cigarette smoke and vitamin C; mice treatment exposed of cigarette smoke by Chinese betel leaf extract at doses of 50, 70, 90 mg/kgBB, respectively After 20 days of treatment, the mice were necropsied and the testicular organs were harvested and prepared by the paraffin method with hematoxylin and eosin (HE) staining. The results show that the chinese betel leaf extract (Peperomia pellucida L.) has no significant differences in testicular morphology weight, but give significant effect on improving of the seminiferous tubule diameter, the germinal apithelium thickness of seminiferous tubules, the spermatogonium, the spermatocytes, the spermatids and the Leydig cells.61 PagesSkripsi Sarjan
Analysis of Marketing and Financial Aspects of Intensive Layer Duck Farming in Sunggal District
No full textThis study aims to assess the financial and marketing feasibility for laying duck farmers in Sunggal District. The method used is purposive sampling, with criteria requiring a minimum of 300 laying ducks per farm. The research was conducted from January to February 2024. Data analysis methods include both qualitative and quantitative descriptive analyses. Based on the research findings using financial and marketing analysis, it is shown that laying duck farming in Sunggal District is viable, meeting investment criteria such as R/C > 1, BEP price and production values for the breeding system being lower than the price and quantity of eggs produced, BEP price and production values for the trading system being higher than the price and quantity of eggs produced, NPV > 0 or positive, and the Payback Period returning within 1 year. Additionally, based on marketing analysis, it is indicated that laying duck farming is feasible to undertake.91 PagesSkripsi Sarjan
The Role of Teacher Stress on Organization Commitment of Teachers at Al-Ulum Elementary School in Medan
No full textOrganizational commitment in teachers is one of the important components in determining the success of education. One of the variables related to organizational commitment in teachers is teacher stress. Teacher stress is an experience experienced by teachers that includes negative emotions caused by demands that exceed the teacher's ability. This study aims to determine the negative role of teacher stress on organizational commitment in SDS Al-ulum teachers in Medan. The respondents in this study amounted to 38 teachers from SDS Al-ulum in Medan. Data collection was conducted using a teacher stress scale prepared based on Kyriacou & Sutcliffe's theory and an organizational commitment scale prepared based on Meyer & Allen's theory. The data obtained were processed with simple linear regression analysis techniques with a significance value of p which is 0,001 (p < 0.05). This shows that teacher stress has a significant role on organizational commitment in teachers of SDS Al-ulum Medan City.86 PagesSkripsi Sarjan
The Utilization Of The Ethanol Extract Of The Bitter Melon Fruit (Momordica charantia L.) As a Hepatoprotector in Mice (Mus Musculus L.) Exposed By The Electric Mosquito Repellent (Allethrin)
No full textFree radicals found in electrical mosquito repellent can cause damage to the liver organs. The damage can be treated by administering antioxidants. Bitter melon (Momordica charantia L.) contains of the flavonoid compounds which has function as natural antioxidants. The research on the use of ethanol extract of the bitter melon fruit (Momordica charantia L). as a hepatoprotector in mice (Mus musculus L.) which were exposed to the electric mosquito repellent drugs was carried out at the Laboratory of Animal Physiology and Experimental Animal Houses of the Biology Study Program, FMIPA USU, Laboratory of Bioorganic Chemistry, Chemistry Study Program, FMIPA USU and Laboratory of Anatomical Pathology, Faculty of Medicine, University of North Sumatra, Medan, North Sumatra. The experimental method used was a complete random design (RAL) consisting of 6 treatments and 4 replicates. The treatment consists of control (no treatment); only exposure to electrical mosquito repellent drugs; exposure to electric mosquito repellent and vitamin C; exposure to electric mosquito repellent and given by ethanol extract of bitter melon fruit with doses of 50, 75 and 100mg/KgBB. The test animals used were male mice (Mus musculus L.) as many as 24 heads. The observations were examined included the morphology (weight, color, texture, surface, and index of liver organs) and the histology (normal hepatocytes, parenchymatous degeneration, hydrophilic degeneration and necrosis). The results show that bitter melon ethanol extract can improve the weight, color, texture, surface and index of liver organs as well as increase the number of normal hepatocytes and reduce the parenchymatous degeneration, the hydrophilic degeneration and the cell necrosis. The ethanol extract of the bitter melon with a dose of 100 mg/KgBB has the potential to be a hepatoprotector in mice exposed to electric mosquito repellent.105 PagesSkripsi Sarjan
The Species of Poaceae at Sipirok Botanical Garden, Tapanuli Selatan Regency North Sumatera
No full textPoaceae are grass plants that are found in primary or secondary forest areas. Sipirok Botanical Garden is one of the conservation areas that has 5 types of vegetation, namely the natural forest, the former plantations, the old secondary forests, the shrubs, and the grasslands. Various types of plant families are found in those five types of vegetation, one of which is Poaceae, but the types of plants from the Poaceae family in the Sipirok Botanical Garden area are not yet known. This study aims to determine the types of Poaceae in the Sipirok Botanical Garden area using the exploration method, which are opening exploration routes and making observations in five forest blocks representing each type of vegetation. The results show that there were 26 species and 21 genera with 2 types of creeping growth and the other types are upright growth. The Sipirok Botanical Garden area occupies a variety of habitats and different topographic conditions, namely the edge of the forest with full sunlight, and areas inside the forest shaded by tree canopies, as well as different physical and chemical factors.66 PagesSkripsi Sarjan