USU-IR Repositori Institusi Universitas Sumatera Utara
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Independent Domination Number of Regular Caterpillar and Lobster Graph
No full textLet G=(V,E) be a simple graph with a vertex set V(G) and edge vertex E(G), let I⊆V(G). Set I is called independent domination if there is no vertices are adjacent in I and for all v∈V(G) \ I are adjacent to vertex in I. Minimum size of indepedent domination set in G called independent domination number i(G). Let C_(n_r ) be the regular catepillar graph with r central vertex and n support vertex, in addition L_(n ) (q;r) be the regular lobster graph with n backbone vertex, q hand vertex, and r finger vertex. In this research, it is shown that C_(n_r ) and L_(n ) (q;r) has a domination number and an independent domination number. The domination number of C_(n_r ) is 〖γ(C〗_(n_r ))=r. The independent domination number of C_(n_r ) for r is an even number is 〖i(C〗_(n_r ))=r/2(1+n) and for r is an odd number is 〖i(C〗_(n_r ))=((r-1)(n+1))/2+1. It has also been proven that in L_(n ) (q;r), the domination number is the same as the independent domination number of this graph, γ(L_(n ) (q;r))=i(L_(n ) (q;r))=nq.50 PagesSkripsi Sarjan
Business Strategy to Enhance Marine Fishery Exports at PT. Gemilang Lautan Sumatera
No full textProcessing and reliance on raw materials remain major challenges in enhancing
the competitiveness of marine fishery export products. On the other hand, the
growing demand for international quality standards, advancements in food
Technology, and exchange rate dynamics present strategic opportunities that must
be maximized. This study aims to analyze the internal and external factors
influencing the export enhancement strategy of PT. Gemilang Lautan Sumatera
through a combined SWOT (Strengths, Weaknesses, Opportunities, Threats) and
PESTEL (Political, Economic, Social, Technological, Environmental, Legal)
approach. The research adopts a qualitative case study method, with data
collection techniques including interviews, documentation, and direct observation.
The analysis reveals that the company’s main strengths lie in its research potential
and strategic logistics access, while weaknesses include technological inefficiency
and the quality of human resources. The PESTEL factors highlight that regulatory
challenges in exports and the need for modern equipment financing are critical
issues, while opportunities arise from stable trade policies and increasing
consumer awareness of high-quality seafood products. The main strategy
recommended is to enhance Technology and strengthen human resource capacity
through research-based initiatives and partnerships, in order to overcome internal
weaknesses and respond to external pressures. This combination of strategies is
projected to strengthen PT. Gemilang Lautan Sumatera’s position in the global
export market in a sustainable manner.103 PagesTesis Magiste
Management of Nursing Services and Care for Clients with Perception Disorders: Auditory Hallucinations through the Implementation of an Educational Program in Medan Kota District
No full textSensory perception disorder (hallucination) is a neurobiological phenomenon that involves distortion of false perception in individuals. This happens due to a disorder in the nervous system and usually does not correspond to reality. Usually sufferers feel the sensation of sound, sight, taste, touch, or smell without any real stimulation. These symptoms when not controlled can harm them selves, thers and the environment, so education is needed to help clients control hallucination symptoms. This scnior practice report aims to implement nursing care in clients with sensory perception disorders: visual hallucinations by implementing educational programs such as information about schizophrenia, voice reprimanding exercises, talking to others, performing daily activities as well as the benefits of taking medication. The methods used are lectures, discussions and exercises to control hallucination symptoms. Data was collected through nterviews, observations and physical examinations. The results of this nursing care showed that clients experienced and improvement in the ability to control hallucinations after being given education and training. The educational program can be used by community psychiatric nurses to help clients control hallucinations and is recommended for use by community psychiatric nurses in basic health care facilities (puskesmas)84 pagesKarya Tulis Profes
Effect of Arabica Coffee Skin Processing Method and Drying Temperature on Cascara Tea Characteristics
No full textArabica coffee is one of the most widely developed coffee types with more
desirable characteristics. Cascara, which is a by-product of arabica coffee in the
form of herbal tea, also has special characteristics. The study aims to evaluate the
effect of processing method, drying temperature level of arabica coffee skin on the
quality and organoleptic characteristics of cascara tea and determine the
combination of processing method and drying temperature that produces the
highest quality and organoleptic value in cascara tea. The analytical model used
is a complete randomized design with DMRT (Duncan Multiple Range Test).
Parameters observed included pH, yield, moisture content and organoleptic tests
(aroma, flavor, aftertaste, appearance, texture and viscosity and overall) using
untrained panelists. The results showed that the processing method and
temperature had a significant effect on most of the parameters tested. Cascara tea
processed using the semi wash method at 80℃ showed the lowest moisture
content and the best organoleptic characteristics. Cascara tea processed by the
natural method produced higher weight with high moisture content.88 PagesSkripsi Sarjan
Right Ventricular–Pulmonary Arterial Coupling Improvement as Predictor of Mortality and Rehospitalization in Patients with Acute Heart Failure with Non-Preserved Ejection Fraction at Adam Malik General Hospital, Medan
No full textObjective:
To evaluate the improvement in right ventricular–pulmonary artery (RV–PA) coupling;
measured by the tricuspid annular plane systolic excursion/pulmonary artery systolic
pressure (TAPSE/PASP), during hospitalization as a predictor of mortality and
rehospitalization within six months after treatment in patients with acute heart failure
(AHF) with non-preserved ejection fraction (non-HFpEF) at Adam Malik General
Hospital, Medan.
Methods:
This study was an analytical study with a retrospective cohort design involving patients
with AHF non-HFpEF treated at Adam Malik General Hospital between January 2023
and January 2025. RV–PA coupling was assessed using the TAPSE/PASP ratio obtained
through transthoracic echocardiography (TTE) at admission and discharge. Statistical
analyses were conducted to evaluate the association between changes in the RV–PA
coupling and six-month outcomes of mortality and rehospitalization post-discharge.
Results:
A total of 62 patients were included, predominantly 48 patients (77.4%) were male, with
a mean age of 60 years. Hypertension was the most common comorbidity in 41 patients
(66.1%), and 48 patients (77.4%) of subjects had a sinus rhythm. The most frequently
observed AHF phenotype was acute decompensated heart failure (ADHF) at 30 patients
(48.4%). At follow-up, 32 patients (51.6%) experienced mortality or rehospitalization
within six months after discharge. Analysis showed that increased TAPSE/PASP, with
increase of TAPSE of ≥1 mm or just overall with cutoff 0.39 and 0.53, respectively, was
significantly associated with lower rates of 6 months post mortality or rehospitalization.
However, multivariate analysis revealed RV-PA coupling improvement as an
independent factor in mortality or rehospitalization, with no significant impact of
supportive therapy during hospitalization or guideline-directed medical therapy discharge
on (GDMT <3 out of 4) on these outcomes.
Conclusion:
Improvement of RV–PA coupling during hospitalization may serve as a substantial noninvasive
predictor of mortality and rehospitalization for 6 months in patients with AHF
non-HFpEF. This measurement could be broadly applied in clinical practice to improve
risk stratification and guide patient management.122 PagesTesis Magiste
The Effect of ShopeePay Application Service Quality on Consumer Satisfaction in D-III Finance Students Vocational Faculty University of North Sumatra
No full textThis study analyzes the effect of the quality of ShopeePay application services on consumer satisfaction in D-III Finance students of the Vocational Faculty of the University of North Sumatra. Research problems arise due to the high use of ShopeePay, but the effect of service quality on satisfaction has not been measured. The method used was quantitative with a sample of 101 students selected using the Slovin formula, data collection through an online questionnaire, and data analysis with validity, reliability, simple linear regression, t-test, and determination coefficient tests using SPSS. The results show that the quality of ShopeePay services has a positive and significant effect on consumer satisfaction with a significance value of 0.000 t table 0.67698. The determination coefficient showed that the quality of service affected consumer satisfaction by 56.9%, while the rest was influenced by other factors outside of this study. The research concluded that service quality, including ease of access, reliability, security, responsiveness, and empathy, plays an important role in increasing student satisfaction of ShopeePay users. It is suggested that ShopeePay improves the security and convenience of the application, and further research can expand the variables and population to get more comprehensive results regarding the factors that affect the satisfaction of digital wallet users.78 PagesKertas Karya Diplom
Analysis of Partnership Impact on the Success Rate of Broiler Chicken Livestock Production in Deli Serdang Regency
No full textLimited capital, fluctuating prices of DOC (Day Old Chick), market uncertainty, and lack of farmers’ understanding of broiler chicken productivity are the main obstacles faced by farmers in Deli Serdang Regency. These conditions have encouraged many farmers to join partnership systems. The partnership system is expected to increase farmers' income through a higher success rate in production.
This study aims to analyze the difference in the success rate between broiler chicken farming using the partnership system (treatment group) and the independent system (control group). Data were collected through interviews with 66 broiler chicken farmers selected using the cluster sampling method. The analytical tool used is Propensity Score Matching (PSM) with the Nearest Neighbor Matching method, supported by STATA software. The results show that the partnership system has a significant impact on the success rate of broiler chicken farming, where the average production of farms under the partnership system is 1.33% higher than that of independently operated farms.77 PagesSkripsi Sarjan
The Effect of Magnesium Chloride Administration on Orthodontic Tooth Movement Distance in Wistar Rats
No full textOrthodontic treatment aims to correct malocclusion through tooth movement involving alveolar bone remodeling and periodontal tissue response to mechanical forces. The prolonged duration of orthodontic treatment has led to the use of interventions to modify the rate of tooth movement, one of which is magnesium, an important mineral in bone metabolism and formation. Magnesium chloride (MgCl₂) is a highly water-soluble form of magnesium that is easily absorbed by the body. This study aims to determine the effect of magnesium chloride administration on orthodontic tooth movement distance in Wistar rats. This study is a laboratory experimental study with a post-test only control group design, using 24 Wistar rats divided into control and treatment groups. The rats were subjected to orthodontic force using coil springs, with the treatment group receiving magnesium chloride at a dose of 90 mg/kg body weight via oral administration. Observations were conducted on days 1, 3, and 7 after the application of orthodontic force using direct measurement and photography methods.
The results showed that the mean of tooth movement distance in the experimental group was lower than in the control group, particularly on day 7 (direct method, p=0.043) and days 1 and 3 (photographic method, p=0.002 and p=0.001). Data analysis using ANOVA and post-hoc LSD tests revealed significant differences between the two groups (p<0.05). In conclusion, magnesium chloride has an inhibitory effect on orthodontic tooth movement in Wistar rats, as evidenced by smaller linear tooth movement distances in the experimental group compared to the control group.91 PagesSkripsi Sarjan
Honda Product Placement in the Film Deadpool & Wolverine and Its Impact on Brand Awareness among Students of the Faculty of Social and Political Sciences University of North Sumatra
No full textThis study aims to determine the influence and the extent of the influence of Honda's product placement in the film Deadpool & Wolverine on brand awareness among students of the Faculty of Social and Political Sciences at the University of North Sumatra. The increasing trend of marketing strategies through entertainment media, particularly product placement in films, serves as the background of this research. Product placement is considered a form of promotion that is non-disruptive yet effective in building brand awareness in the minds of the audience. The research uses a quantitative approach with a descriptive causal research design. Data was collected through questionnaires distributed to 97 respondents and analyzed using simple linear regression. The results show that Honda’s product placement in the film Deadpool & Wolverine has a significant influence on brand awareness, with a contribution of 58.7%. This indicates that product placement strategies in films can shape perceptions and brand recall among students as the target audience. This research reinforces the S-O-R (Stimulus–Organism–Response) theory, where product placement (stimulus) in the film affects individual perception (organism), which then results in a response in the form of brand recognition and recall. These findings are consistent with previous studies which concluded that product placement in films can positively impact brand awareness.129 PagesSkripsi Sarjan
The Influence Of Price, Location, And Servicescape On Customer Satisfaction At Sushi Mentai On Jalan Gudang Dalam
No full textThis study aims to determine the influence of Price, Location, and Servicescape on
Customer Satisfaction at the Sushi Mentai restaurant on Jalan Gudang Dalam. This
is an associative study using quantitative data. The sample in this study consisted
of 172 responden selected using a non-probability sampling technique. The data
analysis method used was Multiple Linear Regression Analysis. The results of the
study show that simultaneously, Price and Location have a significant influence on
Customer Satisfaction at Sushi Mentai Jalan Gudang Dalam. Partially, Price and
Brand Trust each have a positive and significant influence on Customer
Satisfaction. Meanwhile, the Servicescape variable also has a positive influence on
Satisfaction but is not statistically significant. These findings indicate that although
the physical elements of the restaurant contribute to customer comfort, their
influence is not strong enough to significantly increase satisfaction based on the
data in this study.135 PagesSkripsi Sarjan