The purpose of this study is to find out the steps for developing instruments and characteristics of creative thinking skills test on momentum material and impulses. The research subjects were students of class X IPA 1 Cut Nyak Superior High School Dhien Langsa who had received momentum and impulse material. The type of research used is research and development (R&D). The research conducted refers to the development of a product in the form of a creative thinking skills test instrument. Before the test instrument for creative thinking skills was tested on students, expert validation tests were carried out first. The subject of product development consists of content or material experts, instrument experts, and linguists. The data analysis technique used in this study is descriptive analysis techniques. The conclusions obtained after the research are the process of developing creative thinking skills test instruments for physics lessons at Cut Nyak Dhien Langsa High School through several stages, namely the analysis of requirements and characteristics, stages of designing or designing grids and questions, product validation stage, and trial stage product; The characteristics of the test instruments for creative thinking skills developed were declared valid with high interpretations, reliable with very high interpretations, and the level of difficulty and differentiation were classified as good; The creative thinking skills of Cut Nyak Dhien Langsa High School students in class X are classified as good (creative).
Abstract. The potency of the Indonesian geothermal resources able to supply 40% of world's demand on the geothermal resources. These resources are spread over 251 locations at 33 provinces having the total potential energy of 27.149 MW. One of these geothermal resources is Tinggi Raja located at Distric of Dolok Marawa, Simalungun Regency, North Sumatera 449385 E -473025 E and 324105 N -349545 N. This paper reports the study on mapping of the prospect of geothermal resource area by utilizing a remote sensing. The remote sensing consisted of Landsat 8 OLI which was published on February 8th 2015 and June 29th 2015 with Path 129 Row 58 as input data for ENVI 4.7 and ArcGIS 10 as mapping tools. Calculated land surface temperature (LST) was essential for mapping and calculating a geothermal resources. In this study, land surface temperature was used as the Thermal Infrared images obtained from the thermal infrared remote sensor. The highest achieved LST was 310.889587 K. The obtained LST distribution indicated the location of the geothermal potential.
The Earth’s environmental surface have change in local, regional and also global scale in any environmental parameter. Medan, one of big city or region in Indonesia, has fluctuated tropical climate in hydrological cycle. Soil moisture is a key variable in the hydrologic processes that play an important role in determining the availability of water as a fundamental element in human life. Soil moisture is an important parameter for many processes’ hydrology, biology and biogeochemistry. The aim of this study to integrated soil moisture over land area in Medan and surrounding. One of the existing methods to obtain information about soil moisture is Temperature-dryness Vegetation Index (TVDI). TVDI a drought index that is determined based on the empirical parameters of the relationship between surface temperature (TS) and vegetation index (NDVI). The index is associated with soil moisture and obtained only by the input of satellite remote sensing information. Dataset use Landsat 5 TM during 2005 to 1989, Landsat 7 ETM image for 2011, and Landsat 8 OLI for 2014 - 2016. Vegetation index value calculation using InfraRed band (4 to Landsat 5 TM and Landsat 7 ETM or 5 for Landsat 8 OLI) and Band Shortwave InfraRed (5 for Landsat 5 TM and Landsat 7 ETM or 6 for Landsat 8 OLI). The result will be classified from low to high value TVDI. TVDI maximum value each period of the years showed value above > 0.5 that means from moderate to high moisture. From the linear function of TVDI shows the decreasing soil moistures during those time period that assumes assumed the source of soil moisture decreasing conditions due to the surface runoff that resulting in a change in vegetation area and surface temperatures. Reduction of a soil’s capacity to accept, retain, release and transmit water reduces biomass productivity, whether of crops, pasture species, shrubs or trees.
The 7.5-magnitude earthquake was intensified epicentre located in the Mountains Donggala Regency, Central Sulawesi. Devastating earthquake and tsunami on September 2018, that struck and erased urbans and suburbs in stricken city in Central Sulawesi and surrounded. The main priorities of the risk disaster management in post-event are fast and safe detection of geohazards to help search and rescue team do mitigation. Satellite radar and optical remote sensing represent the aim of this research to answer this task with Interferometric Synthetic Aperture Radar (InSAR) by Sentinel-1 Interferometric Wide (IW) Level-1 Single Look Complex (SLC) images and optical satellite data by Sentinel-2 Level-1C product. We collected both of satellite images covering the time interval October 2018 – July 2019. We improved the proposed approach, named as Goldstein interferogram filter and the landslide mapping in Central Sulawesi. The methodology, which is intended as an effective process to suppress phase noise to improve the accuracy assessment and represent the experimental information from a full stack of InSAR data and optical data, is ideally acceptable for geohazard mitigation strategies. This potential method refers to great performance for detecting more than 100 areas affected by active deformation that are most dangerous for one or more risky elements in several parts of three cities.
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