Forecasting Analysis of Cement Selling (Non-Bulk) Using The Method of Triple Exponential Smoothing (Case study: PT. Lafarge Holcim Cement Indonesia)

PT. Lafarge Holcim Cement Indonesia is one of the cement companies focusing on construction. The aim of this study is to analyze the sales forecasting applied to know the next period using Triple Exponential Smoothing. The results showed that the values of MAD, MSE and MAPE for PCC's bag are 3980, 20925291 and 13%, respectively. Meanwhuile, the values for OPC's bag are 105, 19497 and 14%, respectively. Furthermore, the forcasting result of the next period of cement selling for PCC's and OPC's bag are 32498 and 792, respectively. Triple exponential smoothing method is a suitable method to forecast the case that has small bias, such as the case in PT. Lafarge Holcim Cement Indonesia

CHARACTERISTICS OF NATURAL MAGNETITE (Fe3O4) FROM BEACH SAND AS CATALYST APPLICATION IN MATERIALS INDUSTRY

An identification of magnetite nanoparticles synthesized from natural iron sand using co-precipitation method has been conducted. The treatment was undertaken at room temperature and the heating used a pair of acid-base compounds, namely HCL as a solvent and NH4OH as a precipitate. Crystal structures, percentages of elements, particle sizes and magnetic characteristics of the materials were characterized by testing XRF, XRD and Permagraph. The results were then compared with the commercial material purchased from Aldrich (with 97% purity). From the results, it was found that the percentage value of the purity of Fe3O4 derived from natural sand before the extraction was 81.42%, and after the extraction it increased to 86.73%. Furthermore, the saturation magnetization (Ms) value for Fe3O4 ferrite from iron sand was 0.29 T, the residual magnetization or Remanen (Br) was 0.081 T, and Coersivity (Hc) was 1.82 kA/m

OVEN SOLAR DRYER TEKNOLOGI SEBAGAI UPAYA PENINGKATAN PRODUKSI IKAN ASIN PADA MASYARAKAT NELAYAN DI GAMPONG DEAH RAYA KOTA BANDA ACEH

Solar Dryer Oven Technology as an Effort to Increase Salted Fish Production in the Fishing Communities in Deah Raya Village, Banda Aceh CityAbstract. Salted fish processing is one of the traditional ways of preserving fish carried out by the community when the fish harvest is so abundant, so that it can reduce the impact of losses due to fish spoilage. Implementation of community service is intended to introduce oven solar dryer technology as a simple technology to help realize increased productivity of salted fish processing. The target of PKM implementation consists of two groups, the engkut taleung group and the asen belideung group, in Gampong Deah Raya, Syiah Kuala District, Banda Aceh. The method used in this PKM is a technology transfer method. PKM provides a solution by utilizing technology as an effort to increase the production of hygienic salted fish production in the coastal area of Banda Aceh. The result of this PKM activity is the success in the manufacture and assembly of solar dryer ovens, so that PKM activities can be carried out. Technical training on the use of ovens can run well, marked by an increase in community knowledge and skills in using ovens for drying and making salted fish. Furthermore, the solar dryer oven unit is handed over to the community as a salted fish processing technology that can be the best solution in reducing fish spoilage and damage, and can overcome excess catches that have not been marketed, and produce more hygienic salted fish production.  Keywords: fishing communities, oven solar dryer, salted fish, technology.Abstrak. Pengolahan ikan asin merupakan salah satu cara pengawetan ikan secara tradisional yang dilakukan oleh masyarakat pada saat hasil panen ikan yang begitu melimpah, sehingga dapat mengurangi dampak kerugian akibat pembusukan ikan. Pelaksanaan pengabdian kepada masyarakat ini dimaksudkan untuk memperkenalkam oven solar dryer teknologi sebagai teknologi sederhana guna membantu mewujudkan peningkatan produktivitas pengolahan ikan asin.  Sasaran pelaksanaan PKM terdiri dari dua kelompok, kelompok usaha engkut taleung dan kelompok usaha asen belideung, di Gampong Deah Raya, Kecamatan Syiah Kuala, Banda Aceh. Metode yang digunakan dalam PKM ini adalah metode alih teknologi. PKM ini memberikan solusi dengan memanfaatkan teknologi berupa oven solar dryer sebagai upaya peningkatan hasil produksi ikan asin yang higienis di wilayah pesisir kota Banda Aceh. Hasil kegiatan PKM ini adalah keberhasilan dalam pembuatan dan perakitan oven solar dryer, sehingga kegiatan PKM dapat terlaksana. Pelatihan teknis penggunaan oven dapat berjalan dengan baik, ditandai dengan adanya peningkatan pengetahuan dan keterampilan masyarakat dalam menggunakan oven untuk melakukan pengeringan dan pembuatan ikan asin. Selanjutnya, unit oven solar dryer tersebut diserahkan kepada masyarakat sebagai teknologi pengolahan ikan asin yang dapat menjadi solusi terbaik dalam mengurangi pembusukan dan kerusakan ikan, serta dapat mengatasi kelebihan hasil tangkapan yang belum laku di pasarkan, dan menghasilkan produksi ikan asin yang lebih higienis.Kata Kunci: masyarakat nelayan, oven solar dryer, ikan asin, teknologi

Pemantauan kebisingan akibat pengaruh genset di daerah tsunami dengan menggunakan pola hemisphere

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Imaging of Hydrodynamic Field Around Submerged Objects Regular Wave and Tsunami Conditions

Hydrodynamic particle movement under regular waves and tsunami wave are rarely studied due to its complicated sensors. This research is aimed at investigating flow fields around submerged structures due to regular waves and tsunami wave. A series of experiments were performed at Tsunami Flume Workshop Facility at Tsunami and Disaster Mitigation Research Center (TDMRC) of Universitas Syiah Kuala. The flume has 60 m in length, 2.5 m in width and 1.7 m in height. To model the both waves, a set of electrical paddle and sensors were placed at one end of the flume. This set of equipment is able to mimic any waveform model, in this case a regular wave with three scenarios and the 2004 Indian Ocean Tsunami wave scenario. A submerged structure was placed on the bed of the flume to model underwater structures. To capture the flow fields, we use a Laser Particle Image Velocimetry (PIV) Camera made in Seika. During the experiment, the results showed different vortex field for both simulations, regular wave and tsunami, generated in front of the submerged structure. Regular wave flow has maximum velocities of 0.5 m/s, 0.7 m/s, 0.9 m/s in each paddle amplitude change scenario. The flow field produces an anticlockwise vortex around the pipe with differents pattern. Tsunami wave flow velocity during the maximum amplitude phase is about 0.25 m/s with a complex vortex field around the pipe, a combination of clockwise and anticlockwise. This could be interpreted as more chaotic hydrodynamic fields around the submerged structures under regular wave and tsunami conditions

BHINNEKA TUNGGAL IKA DAN KONFLIK SOSIAL; (KHAZANAH MULTIKULTURAL INDONESIA DI ERA POST TRUTH)

Indonesia is one of the largest multicultural countries in the world, this can be seen from the sociocultural and geographical conditions of Indonesia that are so complex, diverse and broad. As a plural and heterogeneous country, Indonesia has the potential for multi-ethnic, multicultural, and multi-religious wealth, all of which are potentials to build a large multicultural nation "multicultural nation-state". This nation-state         multicultural can be double charged; integration or conflict, which must be held together with full wisdom and nuances of tasamuh in the midst of society.   As we understand together, the formation of the State of Indonesia on the basis of its country was formulated with a long and bloody struggle until it was proclaimed on August 17, 1945. The proclamation was also preceded by a long debate about the shape of the country - given the reality of Indonesia's plurality as a nation. as the foundation of the State, with the motto of Unity in Diversity.   The effort for Indonesia to survive as a multicultural country continues to be carried out mainly by strengthening education (religion). Because education is believed to have a strategic role to build and restore the way of thinking and attitudes of students into a level that understands pluralism in societ

Preparation of Palm Oil Ash Nanoparticles: Taguchi Optimization Method by Particle Size Distribution and Morphological Studies

The interest in the utilization of palm oil ash is high, mainly due to their renewable material, opportunity to enhance the properties and possibility to use in a wide range of applications. Palm oil ash is the by-product of the palm oil mill boilers and locally available in the form of micro-size particles. In this research, optimization of the milling process was designed using the Taguchi method to find the most influencing parameters for the preparation of palm oil ash (POA) nanoparticles using a ball milling technique. The experiment was applied using a L9 orthogonal array and signal to noise ratio to investigate the performance of parameters, which are milling time, milling speed, and balls size. The results from signal to noise ratio reveal that to produce POA nanoparticles in optimum parameters, the size of balls shows the highest significant effect on the production of POA nanoparticles, followed by milling time and speed. The results of the parameters optimization experiment were validated by a confirmation test of milling machine operations