A simulation of damping vibration on valve spring hydraulic system has been done. This research is a study of the simulation that aims to control excess vibration on valve spring hydraulic system as a result of excitation force that is affected by the changes of pressure periodically, to produce a stable system. The simulation performed by using Matlab simulink with applying a PID method (P, PD, PI and PID) and noticed to variations of proportional constant (Kp), integral constant (Ki) and the derivative constant (Kd). The simulation results obtained show that by combining these three constants Ki, Kp and Kd can dampen the vibration better. For the total excitation force, using the value of Kp = 106, Ki = 7 x 106 and Kd = 6 x 104 can provide damping vibration system response on valve spring with a rise time of 1.2119 s, settling time of 1.2792 s, stable at setpoint 1, error steady state 0% and a small maximum overshoot of 0.3309. This is the result of a stable system response and best compared to the other combinations of the constant values.

The main problem studied in this study is mapping and analyzing the activity of the types of radioisotope content in rock samples at the mouth of the Sumlili river in West Kupang. The research objectives included: determining the counting range and mass type activity (C) radioisotope content in the sand samples at the Sumlili River mouth in West Kupang, estimating the level of radioisotope contamination according to the standards around the Sumlili river estuary, and mapping the distribution of radioisotope counts in the area covered by surveys in field. Research methods include: observation / survey, sampling, and analysis and interpretation of data. The range of radiation counts in the field, in the laboratory, and the value of the type of mass activity of radioisotope content in 52 sand samples from the study locations in the West Kupang Sumili River are 19 cpm to 60 cpm, 29 cpm to 73 cpm, and 0.107 x 10-5µCi / gram up to 0.269 x 10-5µCi / gram. Based on the three-dimensional contour and curve of radiation from radioisotope counts in sand samples in the field and in the laboratory and three-dimensional contours and curves the activity of mass types in the Sumlili estuary of West Kupang can be seen that the distribution of radioisotope contamination in the Sumlili estuary of West Kupang is higher west and tends to decline to the east. The results of the calculation of the type of mass activity of radioisotope content in sand samples at the mouth of the Sumlili River in West Kupang, are referred to in low contamination for alpha (a) and beta (ß) radiation, but this area needs to be watched out for there are several points in the field, nuclear radiation in mineral deposits quite high exceeding IAEA standards.

Research on the characterization of the physical and the chemical of groundwater in wells along Merdeka Village Kupang East District of Kupang Regency had been done.This research aims to describe and to know the feasible of water in the wells based on salinity, dissolved oxygen(DO), acidity(pH), temperature, and conductivity of groundwater. Data retrieval used portable tools and processed by surfer 13 and Arcgis 10. The result varies because there are several environmental factor. Overall these values are suitable in the standard of feasible water consumption.

In this work, the fluorescence (FL) and bathochromic of the photophysical properties from protonated small molecule in cast film state have been investigated. To realize these purposes, the material of 4’,4’’’’-(1,4-phenylene bis (2,2’:6’,2”-terpyridine) (Phtpy) as a small molecule and camphorsulfonic acid (CSA) as an acid for protonation was selected. For Phtpy, its maxima absorption is 300 nm and no FL color emission. After CSA solution was added in chlorofom solution of Phtpy, the absorption spectrum of protonated Phtpy is broaden to longer wavelength with two new peaks appear at around 350 and 370 nm. Upon direct excitation at wavelength of 300 nm, the range of FL spectrum of original and protonated Phtpy is from 320 to 580 nm and from 370 to 580 with their maxima FL intensities at 360 and 460 nm. Interestingly, protonated Phtpy emits blue FL color emission. In addition, energy gap of protonated Phtpy is smaller than that of pristine Phtpy. Finally, the FL and remarkable red shift of absorption and FL spectra of protonated Phtpy will pave the way to develop sensor and other photonic devices with high performances in the ultaviolet region.

Hydram pump is one type of pump that does not require electricity or fuel. Potential energy from water sources that is channeled as a driving force. Where this tool works at a source of water that has a slope, because this tool requires water flow energy from a height greater than or equal to 1 meter into the pump. In the operation of this pump has the advantage of using PVC pipes which are simple to design can also be made with workshop equipment. This research was conducted to determine the effect of variations in the distance between the waste valve and the delivery valve on the efficiency of the hydram pump. The method used is a real experimental with some changes in the variation of the distance between the waste valve and the delivery valve is 10 cm, 20 cm, 30 cm. From the results of the study that the optimum pumping discharge increased in the short size of 0.00011633 m3 / second, the greater the discharge of waste at a long-distance size of 0.00086013 m3 / second, with the number of beats occurring at 84 times. So that the efficiency of hydrams according to the theory of aubussion obtained the highest yield of 71.02%.

This research aims to Identifed the distribution coulomb stress changed that can be used to seesthe subsequent earthquake that occurs within a short distanceand time span. This research uses earthquake data on 2 August 2019 with Mw 6.9 in Tugu Hilir, Indonesia, at 104.825°E and 7.267°S, with 52.8 km depth (USGS). The focus mechanism (strike, dip, rake) is (201°, 49°, 54°). This data prosessed by using Coulomb 3.3 software in MATLAB. The result found that this main earthquake had an increase coulomb stress changed (= 1.0 bar) in the northeast-southwest and was a subsequent earthquake area. Whereas the area of decrese of coulomb stress changed (= -1.0 bar) in the northwest-southeast.

Analysis of the trend rainfall and air temperature has been conducted on Flores Island (Labuan Bajo, Ruteng, Maumere and Larantuka). The purpose of this study was to determine the profile of air temperature and rainfall and determine air temperature and rainfall trend on the island of Flores for the areas of Labuan Bajo, Ruteng, Maumere, and Larantuka. Data obtained from BMKG Kupang Climatology Station. Data processing by calculating the average to determine the profile of rainfall and air temperature and using linear regression methods to calculate air temperature and rainfall trends. Based on data processing, rainfall profiles on Flores Island for the areas of Labuan Bajo, Ruteng, Maumere, and Larantuka are Monsoon Rain Patterns, for the temperature profile on Flores Island the highest average air temperatures occur in November at 29.90C and the temperature the lowest average air occurred in July of 18,50C. Rainfall trend in Labuan Bajo experienced a downward trend of -0.919 mm, Ruteng experienced an upward trend of 1.2688 mm, Maumere experienced an upward trend of 0.1442 mm, Larantuka had an upward trend of 0.2734 mm. For air temperature trends in Labuan Bajo experiencing an upward trend of 0.03470C, Ruteng experiencing an upward trend of 0.0050C, Maumere experiencing an upward trend of 0.01440C,and Larantuka experiencing an upward trend of 0.0360C.

Hydraulic Pump is a device used to raise water from low to high places Automatically with energy, hydram pump works without using fuel or additional energy from outside and the material used uses PVC pipes, because it is economical and easier to repair when there is damage. In this study the research method used was using an experimental method with independent variables namely Check Valve waste valve distance variations (4 cm, 8 cm, and 12 cm), Check Valve diameter used 2 in. This research was conducted to determine pumping discharge, waste discharge, total knock, DAabussion and Rankine Efficiency. the results showed the highest efficiency was found at the Check Valve distance of 4 cm in diameter of 2.5 in sewage valve at 76.46% for DAbussion efficiency, and 68.29% for Rankine efficiency. While the lowest efficiency is in the 12 cm distance variation of 2.5 in. Sewage valves at 75.13% for DAabussion efficiency and 67.42% for Rankine efficiency.

The study was conducted entitled "The Effect of Magnetic Fields on the Diameter of Green Bean Germination". This study aims to determine the effect of the magnetic field on the diameter of green bean germination. This research was arranged in a Completely Randomized Design (CRD) with one factor, namely magnetic field strength at the same time consisting of controls (0 mT), 5.3 mT, 10.7 mT, 16.1 mT, 21.5 mT . The parameter measured is the diameter of the green bean sprout stem. Data were analyzed by continued variance with DMRT test at a = 5%. The results showed that exposure to the magnetic field affected the diameter of the green bean sprout stem. The treatment that caused the largest stem diameter development was 21.5 mT.

Packing fraction shows the degree of arrangement of fibers in a yarn, which is calculated based on the ratio between the volume of fiber to the volume of yarn or total fiber area to yarn area. In the condition of fiber length and yarn length have the same length, then to calculate volume of fiber and volume of yarn it can be approached by calculating the total fiber surface area and yarn surface area. Precise calculation of the fiber surface area to yarn surface area is very difficult to obtain due to the arbitrary shape of the fiber surface and complex mathematical calculation. To overcome this problem, we need an image processing method to calculate the surface area of any fiber. In this research, a method for measuring the value of Packing fraction has been better obtained using an image processing method to obtain a random area of ??fiber.

The general objective of this work was investigation of radioisotope distribution and accumulation center in mineral deposit at sub-district of Middle Kupang West Timor Island Indonesia. The purposes of research were: to map of radioisotope distribution in the mineral deposit, to estimate area of radioisotope accumulation center in the mineral deposit, to establish range of nuclear radiation counts in the center region of radioisotope content in mineral deposit. The general methods used in this research were observation, survey, mapping, analysis, and interpretation. Procedures detail of research consists of: observe and identify the potential region and plot gridding, calibrate equipment necessary, measure background count in around of survey location and nuclear radiation in the survey location, plot of three dimensions curve and contour after corrected by background count. Based on geology information or geology data (drilling data) three depth levels determined (about 20 m, 40 m and 60 m), Radiation powers were calculated for estimation of accumulation center of radioisotope in deposit mineral, and contour and three dimensions curves of radiation power of radioisotope in deposit mineral were plotted. Results: Based on three dimensional curves and contour map (radiation counts and radiation powers on three levels) of radioisotope in mineral deposit respectively was distributed on area 3.00 x 106 m2, and 1.56 x 104 m2. The interval of radiation counts of radioisotope in mineral deposit was 10 counts per minute-137 counts per minute.