Judul: Sistem Kendali Intensitas Cahaya pada Tanaman Hidroponik Indoor
Abstrak: Sistem kendali intensitas cahaya dibutuhkan pada sistem hidroponik indoor karena kurangnya sinar matahari yang masuk. Penggunaan light-emitting diode (LED) dapat dijadikan sebagai pengganti cahaya matahari dalam pertumbuhan tanaman. LED memungkinkan kegiatan bercocok tanam dilakukan di dalam ruangan dengan minim cahaya. Penelitian ini bertujuan untuk membuat dan menguji prototype sistem kendali intensitas cahaya pada sistem hidroponik indoor. Sistem kendali dibuat menggunakan mikrokontroler Arduino Uno. Pengaturan intensitas cahaya dalam rentang 1440-1500 lx. Perbedaan pertumbuhan tanaman yang menggunakan tambahan LED dan tanpa menggunakan LED terlihat signifikan. Pertumbuhan dengan tambahan LED tumbuh dengan normal, sedangkan tanpa menggunakan LED mengalami etiolasi., A light intensity control system is needed in indoor hydroponic system because of the lack of incoming sunlight. The use of light-emitting diodes (LED) can be used as a substitute for sunlight in plant growth. LED allow farming activities to be carried out indoors with minimal light. This study aims to create and test a light intensity control system prototype in an indoor hydroponic system. The control system uses Arduino Uno as a microcontroller. Light intensity setting in the range 1440-1500 lx. The difference in plant growth using an additional LED and without using an LED is significant. Growth with the addition of LEDs grows normally, whereas those without using LED are etiolated.
Keyword: Control System, Indoor Hydroponic, Light Intensity, LED

Judul: Pertumbuhan Bibit Padi Sistem Hidroponik pada Berbagai Spektrum Cahaya LED
Abstrak: Light plays an important role in the growth of rice seedlings. Sowing rice seeds using hydroponic seeding racks has the disadvantage that the distribution of sunlight on the middle shelf with the lowest level has a small light intensity. The use of LED lights can increase the intensity of light in the hydroponic rack thereby increasing the productivity of the rice seedling nursery using the hydroponic seeding rack. The purpose of this study was to determine the optimum combination of LED light spectrum and to analyze the effect of the combination of LED light spectrum on the growth of rice seedlings on hydroponic seeding racks. The research was carried out by adding LED lights with a combination of red and blue lights 3:1, 4:1, and 5:1 respectively on the hydroponic rack and then analyzing the growth of the most optimum rice seedlings. Based on the results of the analysis of variance for several parameters, namely plant height, number of leaves, and leaf green level, the best treatment combination was the use of 5 red LED lights and 1 blue light at level 1 of the hydroponic seeding rack. Based on this treatment, an increase in light intensity of 6392 Lux was obtained, which was directly proportional to the results of the rice seedling nursery which produced an average rice seedling height of 19.53 cm, 2 panicles of leaves, and 2 levels of green leaves.
Keyword: hydroponics, LED lights, nursery shelve, rice nursery

Judul: Penentuan Premi Tahunan Asuransi Jiwa Berjangka  Last Survivor dengan Model Copula Generalized-Farlie-Gumbel-Morgenstern Tipe I dan II
Abstrak: Last-survivor life insurance is an example of multi-life insurance (two or more insureds) in which failure occurs if all insureds have died. The risk of death of the insureds influences the determination of the annual premium. Premiums calculations are usually carried out by assuming independence among the insureds, however, in reality, husband and wife often share the risk. The correlation between the risk of death of a husband to his wife may differ from that of a wife to her husband. Therefore, the correlation between the risk of death of husband and wife is asymmetric. In this scientific paper, the annual premiums for n-year term life insurance with last survivor status for married couples are calculated using the assumption of independent mortality and dependent mortality using the type I Generalized-Farlie-Gumbel-Morgenstern (GFGM) copula as symmetrical copula and the type II GFGM copula as asymmetrical copula. Based on calculation results, the annual premium determined by the asymmetrical copula is greater than the symmetrical copula and independent mortality. The annual premium determined by symmetrical copula is greater than the independent mortality.
Keyword: annual premium, type I GFGM copula,, type II GFGM copula, last
survivor, life insurance