Pesawat terbang adalah moda transportasi tercepat dengan jangkauan hingga antar benua, menjadikannya pilihan utama untuk perjalanan jarak jauh. Meskipun peluang kecelakaan pesawat sangat kecil, yaitu rata-rata 4 kali dalam 1 juta jam terbang dampaknya sangat fatal bagi penumpang, dengan peluang selamat hanya 24% Penyebab utama kecelakaan pesawat umumnya berasal dari tiga faktor: teknis, cuaca, dan kesalahan manusia (human error). Perawatan pesawat dilakukan secara rutin (scheduled maintenance) dan non-rutin (non-scheduled maintenance) berdasarkan interval waktu yang telah ditentukan. Ada berbagai sumber daya yang digunakan untuk sistem kelistrikan pesawat, termasuk generator mesin, unit daya tambahan (APU), daya eksternal, dan udara ram turbin. Penelitian ini bertujuan untuk mengukur tingkat bahaya dalam kondisi penerbangan saat terjadi gangguan pada sistem kelistrikan, mengevaluasi pengaruh performa pesawat terhadap keandalan sistem kelistrikan, serta menilai peran kemajuan teknologi pembangkit listrik terhadap keselamatan penerbangan. Penelitian dilakukan di Hanggar Batam Aero Teknik, Kecamatan Nongsa, Kota Batam, dengan menggunakan metode analisis data kualitatif. Hasil penelitian menunjukkan bahwa kegagalan sistem kelistrikan pada pesawat meliputi kegagalan pada sistem pembangkit dan distribusi. Terdapat komponen dalam sistem distribusi yang, jika rusak, dapat menyebabkan kegagalan kelistrikan yang signifikan. Sistem pembangkit listrik pada pesawat saling mendukung, sehingga perawatan komponen kelistrikan harus dilakukan tepat waktu dan sebaik mungkin.

This research evaluates the effectiveness of playback TV media in improving students' listening skills at SD 012 Kampung Panjang. Qualitative methods with classroom observations were used to collect data related to student interactions with this media. The research results show that rotating TV can increase students' motivation and involvement in listening learning. This media offers an interesting and realistic learning experience, even though there are obstacles. This research suggests the use of rotating TV and active interaction after listening as effective strategies in language learning.

PT The lathe is one of the essential machines in production activities in this company. The amount of downtime caused by machine failure will reduce product quality and quantity. Therefore, this research aims to identify the factors that most influence the risk of lathe failure so that repair priorities and maintenance strategies can be determined. This can be achieved by using the Failure Mode and Effect Analysis (FMEA) method. FMEA is a method that can be used to identify the causes and impacts of each possible failure mode on machine components by systematically explaining the levels of failure so that appropriate prevention or repair can be carried out. The FMEA method shows the Risk Priority Number (RPN) value as a reference in determining the choice of maintenance strategy, namely, predictive maintenance, preventive maintenance or corrective maintenance. The research results show that the highest RPN value is found in the motor shaft pulley component at 320 and Nut Screw at 210. Maintenance priorities are determined based on the Pareto diagram principle. The appropriate maintenance strategy carried out by PT.
 
Keywords: FMEA, Lathe, Maintenance, RPN

The foundation is a substructure which functions to support the loads and forces caused by the superstructure (superstructure) to the soil layer which will carry these loads and forces. Deep foundations are usually used to obtain a large enough soil bearing capacity and if the depth of the hard soil is far below the ground surface. The aim of this task is to analyze the bearing capacity of pile foundations using sondir data, standard penetration test (SPT) data, as well as the finite element method using the plaxis program. The method used in this final assignment is by studying literature, then collecting the necessary data, and after that carrying out calculation analysis using existing methods. From the results of the calculations carried out, different results were obtained. Where for sondir data at point S1 obtained Qu =115.80 tons; at point S2 obtained Qu = 104.80 tons; at point S3 obtained Qu = 105.50 tons. Meanwhile, based on SPT data at point BH-01, Qu = 398.23 tons, and using the plaxis program Qu = 425 tons

Memory ability plays an important role in achieving optimal results in cognitive aspects, especially in the context of education which is measured through learning achievement. One of the methods used to hone memory is through memorizing the Qur'an. A study was conducted to examine the effect of the ability to memorize the Qur'an on improving cognitive aspects in tahfidz class students at Bustanul Ulum High School in Central Lampung. The research method used was quantitative involving 33 participants. Data were collected through observation, questionnaires to assess the ability to memorize the Qur'an, and documentation of students' report cards. The results showed that the ability to memorize the Qur'an had a significant effect on improving students' cognitive aspects, with an R Square value of 29.7%. That is, about 29.7% of the improvement in cognitive aspects can be explained by the ability to memorize the Qur'an. Other factors outside the method of memorizing al-Qur'an also contribute to the increase.

This study aims to determine the potential zooplankton abundance based on resting eggs in situ cijeuk Sukamekar Village Sukaraja sub-district, Sukabumi district. This research was conducted from October to November 2023. October - November 2023. The sampling location was determined by purposive sampling. The research area was divided into 5 sampling points. Data analysis using the abundance formula and the Microsoft Excel 2013 program and a microscope equipped with the scopeImage 9.0 application scopeImage 9.0 application. The results showed the abundance of Resting eggs at 5 observation points ranged from 92 ± 58 - 1009 ± 1206 grains/m², egg diameter ranged from 4.3 ± 0.57 - 7 ± 1 µm, indicating that the presence of resting egg zooplankton in the cijeruk site still has natural food potential and the results of water quality observations at each station with temperatures ranging between 24.33 ± 0.58 - 25.33 ± 0.58ºC, pH 5.08 ± 2.07 - 6.34 ± 0.31, dissolved oxygen1.83 ± 1.29 - 4.70 ± 1.95 mg/l, brightness 27.50 ± 17.26 - 114 ± 25.06 cm.

Galah shrimp is one type of freshwater shrimp that has great potential for cultivation. One of the obstacles to the growth of king prawns is water quality. This study was conducted to determine the effect of the installation of Vegetable Floating Raft (VFR) on the growth of king prawns (Macrobrachium rosenbergii). This study was conducted using the t-test method, with control and Vegetable Floating Raft treatments. The results showed that the growth pattern of weight and length of king prawns in each treatment was relatively the same. However, the daily weight growth rate of king prawns in the control treatment was greater at 3.36%, compared to the treatment of Vegetable floating raft at 1.26%, while the daily length growth rate of king prawns in the control treatment was 0.86%. The daily length growth rate in the Vegetable floating raft treatment was smaller at 0.61%. During the study the value of the degree of survival of the control treatment was 95%, while in the treatment of Vegetable floating raft the percentage of the degree of survival of king prawns was 62%. Based on the results of visual observations seen the rest of the feed and the rest of the skin during molting. It is suspected that shrimp are stressed due to changes in water quality characterized by increased ammonia levels in the last maintenance week caused by the death of kale plants in the maintenance medium.
 
 
 
 

The background of this research is that vertiqua is considered to have high production costs and small profits. Therefore, a business analysis is needed to increase the effectiveness of the fish farming business using the vertiqua system. The purpose of this study is to analyze the aquaculture business using the vertiqua system including capital and profit obtained. This research uses qualitative methods with descriptive explanations. The results of the research that has been done show that the R / C Ratio value obtained is 1.66, meaning that every 1 cycle cost expenditure will get 1.66 revenue. Koi fish farming using the vertiqua system is said to be feasible to continue because the R / C Ratio value is 1. The JWPM value with the calculation of 8 cycles for 1 year is 1.4, meaning that it takes 2 months and 2 days for the capital to return. Based on the business analysis conducted, the production of koi fish seeds using the upper biofical filter vertiqua system can be said to be feasible and has the potential to be further developed, because it can provide good profits with a good JWPM. In addition, cultivation using the upper biofical filter vertiqua system is very efficient in providing care for koi fish cultivation.
 
 

This study investigates how capital structure and profitability influence the value of PT Astra Agro Lestari Tbk. It employs a quantitative approach using numerical data, specifically analyzing the company's financial reports from 2012 to 2021. The findings indicate that capital structure significantly affects the company's value, with a T-test result showing a calculated value of 5.686, which exceeds the t-table value of 1.89458, and a significance level of 0.031 (less than 0.05). Profitability also has a significant impact, with a calculated value of 5.686 surpassing the t-table value of 1.89458 and a significance level of 0.001 (less than 0.05). This suggests that both capital structure and profitability individually affect the company's value. Additionally, when considered together, capital structure and profitability have a combined significant impact on firm value, with a significance level of 0.002 (less than 0.05) and a calculated F-value of 17.413, which is greater than the F-table value of 4.74. This confirms that both factors together significantly influence the company's value

A city is one of the areas heavily populated by people. In Indonesia, there are a total of 98 cities. A city is a complex area because it has various zones such as central zones, industrial zones, and suburban zones. Additionally, a city should also have green open spaces. Green open spaces can help minimize global warming and the greenhouse effect in urban areas. Moreover, cities often grapple with waste issues. Urban residents should develop good mental attitudes and habits, such as not littering. Cooperation between the government, which builds proper and appropriate urban planning by providing green areas, and the public's awareness to maintain city cleanliness by disposing of waste properly, is necessary.