USU-IR Repositori Institusi Universitas Sumatera Utara
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Internet of Things Bassed Solar Powered Mini Pump for Rice Field Irrigation in Sidoarjo II Ramunia
No full textSidoarjo II Ramunia Village is an agricultural area that has great potential in the agricultural sector, but still faces obstacles in the irrigation system which is less efficient and relies on conventional energy sources. Irrigation is an effort to regularly flow water from water sources to agricultural land. So a water pump is needed to move water from one place to another. However, the use of water pumps also requires additional costs, such as for fuel or electricity, which is a burden for famers. This research aims to design and build a mini pump using solar power based on the internet of things (IoT) as an automatic irrigation solution that is energy efficient and environmentally friendly. This research includes designing a system powered by solar panels and integrating IoT modules (such as ESP32) for remote monitoring and control via a web-based application, so that it can activate the water pump automatically. Testing was carried out with watering cycles in different weather conditions. The results of the study show that this system does not require electricity supply from PLN and the system also runs stably and responsively. The proposed system proved effective in improving irrigation efficiency and is suitable for implementation as a modern irrigation solution in rural areas with limited electricity access.When the solar panel absorbs sunlight energy for 1 hour, it produces an energy value of 0,79 Wh and can pump 1.166 mL of water with the energy released by the pump being 0.024 Wh.50 PagesKertas Karya Diplom
An Analysis of Service Quality at Ar-Rayhan Integrated Islamic School Using The Servqual Approach
No full textThis study aims to evaluate the quality of services at Ar-Rayhan Integrated Islamic
School and its relationship to parental satisfaction. The research employed a descriptive
qualitative method, with data collected through interviews, observations, and
documentation. The findings indicate that, in general, parents are fairly satisfied with
the school's services, particularly in the dimensions of reliability and empathy.
However, there remains a gap between the expectations and the actual services
received. The average score for perceived service quality was 4.27, while the expected
score was 4.58, resulting in an average gap of -0.31. The largest negative gap was
found in the aspect of supporting educational facilities (Gap = -2.28), reflecting a
weakness in the tangibles dimension. Conversely, the highest positive gap was observed
in teachers' responsiveness to students' issues (Gap = +0.20), indicating strengths in the
dimensions of responsiveness and empathy. This study is expected to provide strategic
input for the school to improve weaker service dimensions, so that overall service
quality can better meet parents' expectations.99 PagesTesis Magiste
Waste Analysis in the Coffee Bean Roasting Production Process Using the Lean Manufacturing and Failure Mode and Effects Analysis (FMEA) Approach
No full textThe roasting process in coffee production is a crucial stage with a significant impact on the final product quality. However, this stage often faces challenges that prevent production outcomes from meeting expected targets. Observations reveal the presence of non-value-added activities that lead to waste in the form of waiting time, overprocessing, and unnecessary motion. These issues result in longer processing times and reduced work efficiency. To address these problems, a systematic approach is needed to thoroughly identify and eliminate waste. Lean Manufacturing is applied to detect non-value-added activities through workflow mapping using Value Stream Mapping, while Failure Mode and Effect Analysis (FMEA) is used to prioritize improvements based on the most impactful potential failures. The integration of these two methods is expected to provide effective process improvement solutions, enhance production efficiency, and support the achievement of sustainable production targets.147 PagesSkripsi Sarjan
Synthesis and Photocatalytic Activity of Zno/Cuo Composite Using Green Tea (Camellia Sinensis) Leaf Extract for Methylene Blue Degradation
No full textIn this study, the synthesis, characterization, and analysis of a ZnO/CuO composite
photocatalyst based on green tea leaf extract were successfully carried out. The
ZnO/CuO composite was synthesized using a green synthesis method. The synthesis
process began with the mixing of Zn and Cu precursor solutions with green tea leaf
extract, followed by stirring at 60 °C for 2 hours. After drying, the sample was calcined
at 500 °C for 4 hours to obtain a composite powder that was then characterized.
Characterization using SEM showed that the particle morphology was non-uniform
and exhibited agglomeration. This agglomeration is likely caused by van der Waals
forces between closely spaced particles. XRD analysis confirmed the formation of two
distinct crystalline phases, ZnO (hexagonal structure) and CuO (monoclinic
structure). The CuO peaks became more pronounced with increasing CuO content in
the samples. The addition of CuO also led to an increase in crystallite size and degree
of crystallinity. FTIR data showed absorption bands at 909 cm⁻¹ and 685 cm⁻¹,
indicating the presence of Zn–O and Cu–O bonds, as well as an –OH group around
3400 cm⁻¹ attributed to biomolecules from the green tea extract. UV-Vis analysis
showed that the maximum absorption wavelength of methylene blue was observed at
664 nm. The highest degradation efficiency was obtained in the ZnO:CuO = 8:2
sample, with a concentration reduction from 10 ppm to approximately 0.53 ppm, or
about 94.32%. This high photocatalytic activity is presumed to result from the
formation of a p–n heterojunction that enhances charge separation and boosts
photocatalytic performance.80 PagesSkripsi Sarjan
Early Warning Score As A Predictor Of Mortality In Intensive Care Unit Patients At RS Adam Malik Medan
No full textLatar Belakang: Early Warning Score (EWS) merupakan sistem skoring yang dirancang untuk mendeteksi dini pasien yang mengalami perburukan klinis melalui pemantauan rutin tanda-tanda vital. Penelitian ini bertujuan mengevaluasi efektivitas EWS sebagai prediktor mortalitas pada pasien di Intensive Care Unit (ICU).
Objektif: Penelitian ini bertujuan untuk mengevaluasi efektivitas Early Warning Score sebagai prediktor mortalitas pasien di ICU di RS Adam Malik Medan.
Metode: Penelitian ini menggunakan desain observasional analitik dengan pendekatan kohort prospektif di ICU RSUP Haji Adam Malik Medan. Sampel terdiri dari 120 pasien ICU yang memenuhi kriteria inklusi. Pengukuran parameter EWS (frekuensi napas, saturasi oksigen, tekanan darah, denyut jantung, suhu tubuh, dan tingkat kesadaran) dilakukan pada hari pertama perawatan dan diikuti hingga hari ke-7 perawatan atau sampai pasien meninggal dunia.
Hasil: Dari 84 pasien yang diteliti, 40 pasien (33,3%) memiliki skor EWS tinggi (≥7). Mortalitas pada kelompok EWS tinggi mencapai 65% (26 dari 40 pasien), sementara pada kelompok dengan skor EWS rendah (<7) hanya 12,5% (10 dari 84 pasien). Analisis statistik menunjukkan hubungan signifikan antara skor EWS tinggi dengan mortalitas pasien (p < 0,001; RR = 5,2, IK 95% = 2,8-9,7).
Kesimpulan: EWS terbukti efektif sebagai prediktor mortalitas pasien ICU. Pasien dengan skor EWS tinggi memiliki risiko kematian yang lebih besar dibandingkan dengan pasien yang memiliki skor rendah. Implementasi EWS secara rutin dapat meningkatkan identifikasi dini pasien berisiko tinggi dan menurunkan angka mortalitas ICU.109 PagesTesis Magiste
The Religious System of the Toba Society in the Legend of Lake Toba: A Literary Anthropological Study
No full textLiterary works are created to be enjoyed, understood, and utilized by the
community. This study discusses the religious system of the Toba people in the
legend of Lake Toba. This legend is not only considered an oral story passed
down from generation to generation, but also as a system of religion, culture,
norms and the spiritual relationship of the community with nature and ancestors.
The purpose of this study is to describe the religious system of the Toba people
contained in the legend of Lake Toba itself and describe how the community
perceives the legend of Lake Toba. The method used in this study is a qualitative
method using an interview method to collect data that will be studied by the
author. The results of the study show that the religious system contained in the
legend of Lake Toba is (1) religious emotions, (2) belief systems, (3) rites and
ceremonies systems, (4) rites and ceremonies equipment and, (5) religious
communities. Furthermore, the community's perception of the legend of Lake
Toba comes from a questionnaire answer from the Bakara community. From the
results of the study using a Likert scale calculation, 83,2% of the Bakara
community has a positive perception of the legend of Lake Toba.84 PagesSkripsi Sarjan
Analysis of the Dynamics of Changes in Coastal Mangroves in Serdang Bedagai Regency, North Sumatra Province, 2004-2023
No full textMangroves have an important role in maintaining the balance of coastal ecosystems, but are experiencing changes due to human activities and natural factors. This study aims to analyze the dynamics of mangrove land cover change in the coastal area of Serdang Bedagai Regency, North Sumatra, in the period 2004-2023. The research method used Landsat satellite image analysis with classification techniques based on the Random Forest algorithm in Google Earth Engine. The results showed that the dynamics of mangroves over the past 19 years experienced significant changes due to mangrove utilization with land conversion that turned into oil palm, rice fields, settlements, and ponds. The existence of land conversion is due to the interests of the surrounding community to improve the economy and income. However, there is an increase in mangrove area in some areas due to rehabilitation efforts. This study emphasizes the importance of community participation-based management policies to preserve mangrove ecosystems and reduce the impact of environmental degradation.63 PagesSkripsi Sarjan
The Influence of Imposition of Value Added Tax on Decisions to Purchase Mobile Legend Items (Study on Mobile Legend Application Users in Berastagi City)
No full textAs a nation, Indonesia is actively engaged in various sectors, this is for the sake of creating a prosperous society, for example providing services to the community, enforcing fair laws and maintaining security and prosperity for the country. Value added tax (VAT) has just imposed value added tax on trading via electronic systems (PMSE), one of which is the purchase of items in online games, so that the receipt of value added tax on electronic trading is better known to many people. So the author researched in his final assignment with the title “"The Influence of Value Added Tax Implementation on Mobile Legend Game Item Purchase Decisions (Study on Mobile Legend Application Users in Berastagi City)
This research aims to find out whether the imposition of value added tax influences the decision to purchase online game items among Mobile legend applictaion users in Berastagi city and also to find out how tax is applied to the purchase of online game items.
The form of research used in this research is quantitative research with an associative approach. Quantitative research methods are research methods that are based on the philosophy of positivism, used to research certain populations or samples, collecting data using research instruments, quantitative or statistical data analysis, with the aim of describing and testing predetermined hypotheses.
The results of research using questionnaires and questionnaire data processed using SPSS show that the imposition of tax on purchasing online game items influences purchasing decisions. Also, the application of tax to the purchase of online game items apparently has the same mechanism as other PMSE VAT taxation.98 PagesKertas Karya Diplom
Factors Related to Low Back Pain Complaints in Workers in Small Industry Center Medan City
No full textLow back pain is pain felt in the lower back to the buttock crease that can radiate
to the legs. Low back pain is one of the most common occupational diseases,
especially in tailors and particularly workers at the Small Industry Centre in Medan
City. The workers sew with a static posture for a long time every day. This study
aims to analyse the relationship between age, length of service, work posture, and
length of work with low back pain complaints in workers at the Small Industry
Centre of Medan City. This type of research uses a cross-sectional approach. This
type of research uses a cross-sectional approach. This study used a total sampling
technique involving all workers at the Small Industry Centre of Medan City as many
as 35 people as samples. The data collection method used the Nordic body map
questionnaire and REBA observation sheet. Data were analysed using the
Spearman Correlation test. The results showed no significant relationship between
age and low back pain complaints (p-value = 0.289), but there was a significant
relationship between working period and low back pain complaints (p-value =
0.024), there was a significant relationship between work posture and low back
pain complaints (p-value = 0.046), and there was a significant relationship between
work duration and low back pain complaints (p-value = 0.023). It is recommended
for workers to pay attention to work postures during work, stretching regularly,
and take regular breaks.83 pagesSkripsi Sarjan
Performance Measurement of Supply Chain using SCOR and AHP Methods at PT Keloria Moringa Jaya
No full textPT. Keloria Moringa Jaya is company in Medan City that produces herbal products,
one of which is andaliman coffee. In its production process, the company faces
various obstacles in the supply chain such as late delivery of raw materials and
inconsistencies in the amount of raw materials which result in delayed production
processes and financial losses. This study aims to measure the performance of the
andaliman coffee supply chain at PT. Keloria Moringa Jaya using the Supply Chain
Operations Reference (SCOR) and Analytical Hierarchy Process (AHP) methods.
This study uses primary data in the form of observations, interviews, and AHP
questionnaires to related parties, as well as secondary data from company
documents and literature studies. Identification of Key Performance Indicators
(KPIs) is carried out based on the five main processes in the SCOR model, namely
plan, source, make, deliver, and return. Performance values are calculated using
the Snorm De Boer method, while criteria weighting is carried out using the AHP
method. The results of the study show that the overall supply chain performance
value is in the Average category with a score of 55,06. Based on the analysis of the
traffic light system, 8 indicators were found to be red, 1 indicator was yellow, and
6 indicators were green136 PagesSkripsi Sarjan