USU-IR Repositori Institusi Universitas Sumatera Utara
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Analysis of the Dynamics of Mangrove Cover Change in Langkat Regency, North Sumatra Province in 2004-2023
No full textMangrove forests have crucial ecological functions in mitigating coastal disasters, such as abrasion and tsunamis, as well as providing important habitat for various species of fish and marine life. However, mangrove forests have been converted to other land uses, resulting in the loss of these functions. The purpose of this study was to analyze the dynamics of mangrove cover change and evaluate the use of Modular Mangrove Recognition Index (MMRI) for the period 2004 – 2023 in the coastal area of Langkat Regency, North Sumatra. Land cover analysis was conducted using the Random Forest (RF) guided classification method. Satellite images used in this study are Landsat 5 TM images for the period 2004 and 2008, while in 2013, 2018, and 2023 using Landsat 8 OLI images. The results showed a decrease in mangrove forest area in the period 2004 to 2013, from 30,800.78 ha to 12,189.4 ha. Mangrove cover increased from 2013 to 2023 from 12,189.4 ha to 20,218.4 ha in 2023. However, the overall area of mangrove forests in Langkat Regency decreased by 10,582.38 ha from an area of 30,800.78 ha in 2004 to 20,218.4 ha in 2023.62 PagesSkripsi Sarjan
The Role of Picture Book Illustrations in Reading Interest Among Upper Elementary School Students in Binjai City
No full textThe low reading interest among elementary school students remains a major concern in the field of education. One approach believed to help improve reading interest is the use of illustrations in picture books. This study aims to determine whether picture book illustrations play a role in enhancing the reading interest of upper elementary school students in Binjai City. The study involved 161 students selected through purposive sampling. The quality of illustrations was assessed using a rating rubric, while reading interest was measured using a reading interest scale. Descriptive analysis results showed that the illustrations in the books were rated as good, and most students had a high level of reading interest. However, the Spearman correlation test revealed no significant relationship between illustrations and reading interest. The correlation coefficient (r = 0.096) indicated a very weak relationship, and the significance value (p = 0.228; p > 0.05) suggested that the relationship was not statistically strong. Thus, picture book illustrations did not play a significant role in increasing students' reading interest.131 PagesSkripsi Sarjan
Promotion Through Social Media at the Library of University of Medan Area
No full textThe rapid development of information technology over the past two decades has
transformed various aspects of life, including the management and services of
libraries. In this context, social media has emerged as an effective and efficient
communication tool to reach a wide audience quickly. The University of Medan
Area (UMA) Library has utilized social media as a promotional tool and a channel
for disseminating relevant information to the academic community, including both
students and lecturers. This study aims to explore the use of social media for
promotional purposes at the UMA Library and identify the challenges encountered
in its implementation. Data collection methods include observation, interviews,
literature review, and documentation. The findings reveal that promotional
activities via social media include information on library services, engaging video
content, documentation of events, weekly quizzes, and a book donation program.
The latter has attracted both students and lecturers, particularly as it supports
lecturers’ requirements for academic promotion by obligating them to donate three
copies of their authored books or published journals to the library. The promotional
strategies align with the AIDA model (Attention, Interest, Desire, Action), aiming
to attract attention, stimulate interest, generate desire, and prompt action among
users. However, the implementation faces challenges such as limited human
resources in videography and content creation. In conclusion, social media
promotion at the UMA Library has proven to be fairly effective in capturing
attention and increasing library visits, although improvements in human resource
management are needed to optimize social media content development.56 PagesKertas Karya Diplom
An Analysis of Waste in UMKM Kerupuk Cap Udang Kembar Through the Application of Lean Manufacturing and Kaizen Principles
No full textMicro, Small, and Medium Enterprises (MSMEs) play a significant role in Indonesia's economy, particularly in the snack food industry such as cracker production. However, production efficiency often remains a challenge. UMKM Kerupuk Cap Udang Kembar is a micro enterprise engaged in the production of snack foods, specifically crackers. Although some machines are used in its production activities, many processes still rely heavily on manual labor and conventional systems. In practice, the production of Palembang crackers at this MSME often falls short of the monthly targets. Observations revealed the presence of non-value-added activities that indicate the existence of waste, which negatively impacts production efficiency. This study aims to identify and reduce waste in the Palembang cracker production process at UMKM Kerupuk Cap Udang Kembar through the application of Lean Manufacturing and Kaizen principles. The methods used include Value Stream Mapping (VSM), Process Activity Mapping (PAM), seven waste analysis, fishbone diagrams, and improvement strategies using the 5W+1H method. The analysis shows that the most dominant type of waste is waiting, particularly at the mixing and drying stations, with an initial Process Cycle Efficiency (PCE) of 44.52%. The root causes of waste stem from imbalanced work distribution, limited machine availability, and dependence on weather conditions. The proposed improvements focus on reevaluating task allocation using a line balancing approach and developing a hybrid drying system that utilizes oven machines. Post-improvement evaluation indicates a significant efficiency increase, with PCE rising to 84.95% and Non-Value-Added (NVA) activities decreasing from 49.88% to 2.88%. These findings demonstrate that the implementation of Lean and Kaizen can effectively enhance efficiency and reduce waste in MSMEs.208 PagesSkripsi Sarjan
Study on Efficiency and Consistency of Adaptive Simple Additive Weighting Method in Stock Selection Decision-Making Using Moving Window Entropy and Monte Carlo Simulation
No full textThis study aims to examine the Simple Additive Weighting (SAW) method to enhance
its adaptability to the dynamics and uncertainties inherent in stock selection decision
making. An adaptive approach is implemented through the integration of dynamic
weighting based on Moving Window Entropy (MWE), along with result validation using
Monte Carlo Simulation to assess market uncertainty through the probability of positive
returns and market risk. Additionally, an adaptive threshold strategy is employed
to filter stock alternatives based on the confidence level derived from the simulation
outcomes. A case study was conducted on three IDX-listed stocks (BBRI, PTBA,
and UNVR) as alternatives, using two observation phases at different time periods
to evaluate the method’s performance. The criteria used include return, volatility,
liquidity, and stock beta. Validation results demonstrate that the adaptive SAW method
shows consistency with the actual rankings in the first phase. In the second phase, the
top-ranked stock remained consistent with the actual ranking, although a swap occurred
between the second and third positions. These findings suggest the potential presence
of model misalignment, indicating the need for further refinement through continued
research. Nevertheless, the Adaptive SAW was able to produce the top-ranked stock
in both phases, reflecting the general stability of the model. This approach highlights
the potential of adaptive SAW as a flexible and context-aware evaluation framework for
stock selection amid market uncertainty.89 PagesSkripsi Sarjan
The Efectiveness of Nuts (Myristica fragrans Houtt) Leaf as an Antibacterial in Inhibiting The Gowth of Streptococcus mutans In Vitro
No full textA problem that is currently occurring in developed and developing countries
regarding dental and oral health is dental caries. One of the countries where dental
caries is often found is our own country, namely Indonesia.1 Behavioral factors that
ignore the cleanliness and health of the teeth and mouth are one of the factors causing
problems with the teeth and mouth. This is due to a lack of knowledge about the health
and maintenance of teeth and mouth. The World Health Organization (WHO) has
recommended the use of traditional medicines, such as plants and herbal plants to
maintain public health. One of these medicinal plants is nutmeg. This study used 7
treatment groups, namely; group 1: Nutmeg leaf extract 50%, Group 2: Nutmeg leaf
extract (25%, group 3: Nutmeg leaf extract 12.5%, group 4: Nutmeg leaf extract 6.25%,
group 5: Nutmeg leaf extract 3.125%, group 6: Dimethyl sulfoxide (Negative Control),
group 7: Chlorhexidine gluconate 0.2% (Positive Control). Kirby-Baeur, where sterile
paper discs were soaked in nutmeg leaf extract and left for 24 hours and the inhibition
zone was calculated, then the most effective results were obtained in group 1 with 50%
nutmeg leaf extract with an inhibition zone of 16,525 mm.76 PagesSkripsi Sarjan
Experimental Study of Vios Car Braking Analysis
No full textThis study evaluates the performance of the front disc brake system on a Toyota Vios through an experimental comparison of conditions before and after servicing (service brake). Tests were conducted at speeds of 10 km/h, 30 km/h, and 50 km/h using three variations of pedal force (10 N, 12 N, and 15 N). Measured parameters include braking time and distance, hydraulic pressure, caliper clamping force, frictional force, and braking torque. Data were collected on a dry asphalt straight track using a measuring tape, stopwatch, spring scale, and pressure sensors.
The results show a significant improvement after servicing: the percentage of stopping distance within the safety category increased from 33.33% to 88.88%. Maximum hydraulic pressure reached 63.7 kPa at 20 N pedal force, generating a clamping force of 115.28 N and braking torque of 21.90 Nm; at 15 N and 12 N, pressures of 47.71 kPa and 38.17 kPa were recorded with torques of 11.48 Nm and 5.25 Nm, respectively. The average stopping time and distance decreased by over 40% after servicing, indicating a linear relationship between pedal force and braking effectiveness.
In conclusion, replacing brake pads and servicing the hydraulic system significantly enhanced the Toyota Vios braking performance, making it more responsive and safer. The braking system demonstrated proportional characteristics: the greater the pedal force, the higher the hydraulic pressure, clamping force, frictional force, and braking torque generated. This study recommends further testing with a wider range of speeds and analysis of the influence of vehicle age and maintenance patterns on braking efficiency.72 PagesSkripsi Sarjan
Analysis of The Influence of Governance, Organizational Commitment, Rewards and Punishment on The Implementation of Performance-based Budgeting at the Regional General Hospital of Panyabungan
No full textThis research aims to determine the influence of Governance, Organizational Commitment, Rewards and Punishment On The Implementation Of Performance-Based Budgeting at The Regional General Hospital of Panyabungan. The population in this study were all employees of Panyabungan Regional Hospital. This research used the Disproportionate Stratified Random Sampling method to obtain a sample of 110 employees. Data collection was carried out by distributing questionnaires to respondents and the data obtained was tabulated by excel and processed by using SPSS Version 25. The results of data analysis showed that each of Governance, Organizational Commitment, Reward and Punishment had a significant effect on the Implementation of Performance-Based Budgeting at the Panyabungan Regional General Hospital.101 PagesSkripsi Sarjan
Analysis of the Factors Affecting the Export Volume of RSS-1 Rubber Product of PTPN IV Regional I
No full textThe export of RSS-1 rubber produced by PTPN IV Regional I has experienced
significant fluctuations over the past five years. The company contributes more than 20 percent to the national export volume; however, in recent years, global demand for
RSS-1 rubber exports has declined. This study aims to analyze the influence of
production volume, export price, domestic price, domestic sales volume of RSS-1 from
PTPN IV Regional I, and the Rupiah to USD exchange rate on the export volume of
Ribbed Smoked Sheet-I (RSS-1) rubber produced by PTPN IV Regional I during the
period of January 2019 to December 2023. The research method used is the Vector
Error Correction Model (VECM). The independent variables in this study include
production volume, export price, domestic price, domestic sales volume of RSS-1
rubber from PTPN IV Regional I, and the Rupiah to USD exchange rate, while the
dependent variable is the export volume of RSS-1 rubber produced by PTPN IV
Regional I. The VECM method uses 60 months of time series data that is stationary at the first difference level with a significance level of 5 percent. The results show that in the short term, the production volume variable has a significantly positive effect on export volume, while the export volume itself, export price, and domestic sales volume have a significantly negative effect. The domestic price and the Rupiah to USD exchange rate variables do not show a significant effect on the export volume of RSS-1 rubber produced by PTPN IV Regional I in the short term. In the long term, the production volume and domestic price variables show a significantly negative effect on the export volume of RSS-1 rubber, while the export price and domestic sales volume variables have a significantly positive effect. The Rupiah to USD exchange rate variable does not show a significant effect on the export volume of RSS-1 in the long term.101 PagesSkripsi Sarjan
Design of a Digital Art Gallery in the Open Space of Ex-Taman Ria Medan Using a Green Architecture Approach
No full textMedan City is a city with a rich culture, very diverse history, and also
has many very interesting tourist attractions to visit. According to the North
Sumatra Culture and Creative Economy Agency (Disbudparekraf) also stated
that Medan has great potential to become one of the shopping tourism
objects in Indonesia. This has led to the development of many Medan City
tours that are more directed at shopping centers, culinary and others related
to shopping tourism. Medan currently still lacks a special space that can be
a place for digital art expression. The art gallery itself is a place that has a
function to display various arts that will be shown to the public, especially
art that will be displayed digitally. The design of this gallery art uses digital
technology to display works of art. The design of digital technology in this
gallery applies the principles of green architecture so that it can produce
environmentally friendly buildings. One of its applications is a green base
area in the form of a landscape that will be created on the art gallery land
located in the open space of the former Medan City amusement park, then
the technology used does not impact the environment and is also energy
efficient. This digital art gallery is expected to become a new landmark for
Medan City which not only attracts tourists but also promotes art and
culture by considering environmental sustainability.174 PagesSkripsi Sarjan