A simulation that describes the trajectory of the orbit of a celestial bodies has been done by using Wolfram Mathematica software version 10.3. differential equations in the case of the earth’s orbit around the sun that moves along the ellipsoidal are solved by the Euler-Lagrange equation. This research aimed to proved the law of Kepler II in the case of the orbit an elliptical celestial bodies which includes velocity and position at any time. From the results of the Euler method simulation that has been carried out, it can be seen on the Mathematica notebook in the form of graphs of earth’s elliptical orbit trajectories in each acceleration when the value of , so that it can be said to fulfill Kepler’s I law. From this simulation also obtained the value of eccentricity () : 0,562437, total energy (E) : -0,21875 kg m2/s2 and E: -0,218758 kg m2/s2 and value of period (T) : 21,7112 s and T: 21,7114 s.

Research on tidal analysis has been done using the Least Square method in the sea area surrounding Ende, East Nusa Tenggara. This research aims to determine the components of tidal harmonics using the Least Square method and to analyze the type of tides using Formzhal number. Based on the results of analysis data, it is known that tidal harmonic components are M2, S2, N2, K1, O1, Q1 and the type of tides in Ende sea included mixed type of tide prevailing semidiurnal with Formzhal (F) value of (0.38), (0.31), (0.25), (0.28), (0.38), (0.44), (0.41), (0.33), (0.25), (0.27), (0.35), and 0.42. The results show the amplitude of the main tidal component M2 and S2 is the dominant component in the Ende Sea compared to the main single tidal component K1 and O1.

The preliminary study of the UV-Vis absorption compounds spectrums from the extraction of lime leaves (Citrus aurantifolia) from Tarus on Kupang regency was conducted. The purpose of this study is to determine the absorption range value, absorption coefficient, energy gap, and specific extinction coefficient. Dry lime leaves are mashed, extracted, evaporated, then diluted using ethanol solvent. Furthermore, the results were characterized using a UV-Vis spectrometer to obtain the absorption spectrum. Based on the results of the absorption spectrum analysis, the absorption range for concentrations of 100 ppm, 200 ppm, and 300 ppm ranges from 200 nm to 700 nm. The maximum absorption coefficient values at 100 ppm, 200 ppm, 300 ppm are 4,387 cm-1, 6,589 cm-1, 8,044 cm-1 respectively. The value of the energy gap is 1,838 eV. Based on the energy gap values, the compounds extracted from lime leaves can be classified as semiconductor materials. The maximum specific extinction coefficient value is 15.841 mL gram-1 cm-1at 212 nm.

Research has been conducted on the emergence of the distribution of F above Kupang by using scaling ionogram data from 2013 to 2015. This study aims to study the characteristics of F distribution events and variations in the type of occurrence of F distribution based on their climatology appearance used in High Frequency radio wave moorings (HF ; 3-30 MHz) and a satellite-based navigation system called the Global Navigation Satellite System (GNSS). The appearance of spread F has an interaction with the scintillation event that originates from the activity of the sun and the wave of release that occurs at night (18.00-06.00) LST. The results of the analysis of the emergence of the F spread in the period 2013-2015 indicate that the appearance of the highest F spead in 2014 with the type of spread F frequency in the period of 2014 is still the peak of the 24th solar cycle which is expected to be protected or used by the minimum sun to be used to monitor solar activity such as flares and CME at the beginning of the middle of 2014 is very high, which causes geomagnetic disturbances in the ionospheric layer to be very large where the frequency F type spread is related to geomagnetic interference. The intensity of diffuse F events occurs in the middle of the year in June compared to the initial and end of the year with a low rate of occurrence in the equinox phase. The maximum number of occurrences of the F spread occurs at midnight (10:00 p.m.: 00: 00) LST and minimum at the beginning and end of the night. Analysis in the domain using the Fast Fourier Transform (FFT) method, showed that there were occurrences that spread F for 3 years (36 months) occurring in the range 200 to 600 days. The frequency of occurrence of spread F for each semester is 0.1 to 0.2 per day. This information shows that the intensity of the spread of occurrence of F that can be carried out by radio waves in the ionospheric layer above the Kupang region is still low with an event period of 365 days or 1 year for 3 years (2013-2015) and can be used as an Annual indicator.

Had been researched by using a multi gamma irradiation method for genetic engineering on local soybean plant from Alor in Kabola Sub-District, Kabola District Alor Regency was done. This research aims to develop local soybean from Alor with multigamma irradiation application to obtain superior varieties that can adapt to low relative rainfall conditions and increased production and determine the appropriate dose to obtain superior soybean varieties, as well as to inventory the superior characteristics of soybean result of multigamma irradiation. The results showed that the exact dosage of soybean crop recovery ranged from 2000 rads-3000 rads. Characteristics would be superior at doses of 3000 rads compared to 2000 rads and 4000 rads. The estimated increase in local soybean production Alor shown at doses of 3000 rads and 2000 rads increased by 47.3% and 42.8% respectively compared to the dose of 4000 rads which reached 23.2%.

Telah dirancang sebuah sistem alat peraga praktikum gerak jatuh bebas dengan memanfaatkan fotodioda dan LED inframerah untuk mendeteksi gerak benda. Arduino Mega ADK sebagai pengontrol sistem, digunakan metode regresi non-linear polinomial orde dua dan bantuan bahasa pemrograman delphi 2010 untuk menganalisis persamaan gerak benda. Penelitian ini bertujuan untuk mengetahui nilai waktu tempuh benda, percepatan gravitasi, kecepatan dan grafik ketinggian serta kecepatan terhadap waktu. Nilai waktu tempuh objek yang diperoleh dari sensor pertama hingga sensor duabelas secara berturut-turut adalah 0.013944 s, 0.12069 s, 0.187906 s, 0.242262 s,0.289044 s, 0.330328 s, 0.36791 s, 0.402518 s, 0.435036 s, 0.465516 s, 0.494536 s, 0.522316 s. Nilai Kecepatan dari sensor pertama hingga sensor duabelas secara berturut-turut adalah -0.998308 m/s, 2.043109 m/s, -2.701001 m/s, -3. 233022 m/s, -3.690912 m/s, -4.094988 m/s, -4.462831 m/s, -4.801565 m/s, -5.119842 m/s, -5.418172 m/s, -5.702212 m/s, -5.974115 m/s. Nilai percepatan gravitasi yang diperoleh pada lokasi dengan posisi lintang -10.155021° dan elevasi 43 meter adalah -978,893.4689 ± 26.453

In this article, optical energy gap of compounds from Annona Muricata L. leaves is estimated using Tauc plot. The leaves taken from Sumba Barat Daya are dried and mashed to become powder, which is then extracted by maceration. The extract is then evaporated to obtain a viscous solution of the leaf extract. The solution is further diluted to obtain solutions with concentration of 100 ppm, 200 ppm and 300 ppm. The solutions are then characterized using UV-Vis spectrophotometer. UV-Vis absorption spectrum obtained is then analyzed to obtain optical energy gap of the material. Using Tauc plot method, the average optical energy gap of the extract is found to be 1,830 eV