Pemodelan Dan Simulasi Urutan Pengelasan Bilah Roda Traktor Berbasis Metoda Elemen Hingga

This paper discusses the modelling and simulation of welding process based on the finite element method (FEM) in order to predict the welding distortion of tractor wheel blades. Two FEM modellings are needed to obtain the welding distortion models, namely thermal and elasto-plastic. The effect of welding thermal is assumed as tendon force and to be used as input of the analysis of elasto-plastic modelling. Welding distortion simulation results were verified using the experimental data. The verification results have shown similar shape of the welding deformation between simulations and experimental. Also, deviation value of displacement distortion between simulation and experimental is small. Hence, the simulation of welding deformation modelling using thermal elasto-plastic FEM can be used to predict the welding distortion of tractor wheel blades. Based on simulation results, the shape of radial and axial displacement distortion due to welding the blade with serial sequence was larger than that of the shape distortion due to welding of the blade with a recommended sequence. After welding simulation of those of 16 wheels tractor blades, the predicted value of displacement distortion due to welding of the blade with serial sequence is equal to 3,393mm, which was larger than that of 1,440mm due to welding of the blade with recommended sequence

Effect of Particle Size on Mechanical Properties of Pellets Made from Biomass Blends

AbstractWoody biomass is densified in the form of pellets in order to improve its physical and mechanical properties during handling and storage. However, limited research work has been conducted on the mechanical properties of pellets made from agricultural and wood biomass blends. Two commonly available forestry biomass, spruce (S) and pine (P), and three agricultural biomasses, reed canary grass (RCG), timothy hay (H) and switchgrass (SW), were used to form pellets. The mechanical properties were evaluated for three different particle sizes (150-300, 300-425 and 425-600μm). An Instron attached with an in-house built single unit pelletizer and temperature controlled die was employed to produce a pellet. The aim of this study is to investigate the effect of particle size and blending (agricultural and woody biomass) on the mechanical properties (density and intrinsic yield stress). For all biomasses, pellets made from lower particle size (150-300μm) exhibited higher density (950-1178kg/m3 for spruce and pine; 668-800kg/m3 for RCG, H and SW; 900-970kg/m3 for blended biomass). The intrinsic yield stress exhibited differences in values for individual forestry (40MPa) and agricultural biomass (27-48MPa), however after blending the values converged closest to that value for forestry biomass. In conclusion, blending low cost and abundant available agricultural biomass with woody biomass could not only result in better mechanical properties but would also help to meet the pellet market demand in future

Pemanfaatan Sedimen Aquatis Sebagai Filler dalam Campuran Aspal Beton Lapis Aus

The sedimentation of Lake Limboto causes silting so that dredging is needed to be used later in road construction. This study aims to test the waste of Lake Limboto can be used as a filler in the AC-WC mixture. For the percentage of filler content in the mixture and analyze the value of Marshall characteristics using Limboto Lake sediments. Aggregate originating from AMP PT. Cahaya Nusa Sulutarindo is located in the Isimu sub-district, Gorontalo Regency. The test was carried out at the Engineering LAB, Gorontalo State Civil University. The test method is the Marshall Test which refers to the general specifications of the 2018 Revision II Road and Bridge Highways. Marshall AC-WC mixture uses an optimum asphalt content of 6.35%: sediment variation 0.1% and 0.2% all values of Marshall characteristics meet the requirements according to the general specifications for 2018 revised road and bridge construction work. Variation of 0.1% is obtained the value density 2.304; VIM 3.66; VMAs 17.91; VFA 79.56; free 1259.44; stream 3.18; a variation of 0.2% obtained a density value of 2,314; VIM 3.21; VMA 17.52; VFA 81.68; fortress 1208.08; flow 3.00. The ideal mixture material for the AC-WC mixture using Lake Limboto sediment with an optimum asphalt content of 6.35% obtained 14.0% coarse aggregate (CA) of 157.3 gr, medium aggregate (MA) 34.0% of 382.1 gr and 52.0% fine aggregate (FA) of 584.4 g without sediment, for variations of 0.1% sediment of 0.6 g and 0.2% of 1.2 g

Early Childhood Mindset Stimulation for Understanding Pancasila Through Affective Education

This study aims to find out how to stimulate Early Childhood Mindset in Theodeosius kindergarten through affective education. This research is qualitative research. Data analysis is done by reducing data, presenting data, and drawing conclusions. The research findings show that students are very enthusiastic about following the activities of the teacher with pleasure, happiness and not feeling burdened from the beginning of the activity to the end, students can take part in the activities of the teacher well. The efforts made by TK Theodosius educators are good, so that it can be said that the teacher's efforts to train children's independence are maximized. The students have begun to instill Pancasila values in their daily lives, namely Godhead, Humanity, the Value of Unity, People's Value, and Social Justice. Keywords: Affective Education, Early Childhood Mindset Stimulation, Understanding Pancasila. References Abramson, L., Daniel, E., & Knafo-noam, A. (2018). 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Spiral CT angiography in an infant with a hypoplastic aortic arch

The advent of multislice computed tomography (CT) has revolutionised the performance of body CT and allowed the development of CT angiography (CTA). CTA is a robust and minimally invasive method of visualizing the arterial vascular system. The newer generation of multidetector scans has allowed for shorter scanning times with no respiratory misregistration at peak vascular opacification following peripheral contrast injection. The volume of data obtained from these scans can be further manipulated to generate two-dimensional (2D) and three-dimensional (3D) images with no increase in radiation to the patient. Hence, CTA has gained popularity and importance as the alternative diagnostic tool especially for ill patients in which conventional angiography is inadvisable

Relationship Between Islamic Stock Prices and Macroeconomic Variables: Evidence From Jakarta Stock Exchange Islamic Index

This paper attempts to analyze the relationship between Jakarta Stock Exchange Islamic Index (JII) and selected macroeconomic variables namely exchange rate, industrial production, inflation rate, and money supply. We used monthly data from January 2000 toDecember 2010.The methodology used in this paper is time series techniques of co-integration and vector autoregression (VAR). In the analysis, we rely on variance decompositions and impulse-response functions to capture the strength of interactions among variables. The results revealed that there is co-integration between Islamic stock prices and macroeconomic variables. Specifically, Indonesian Islamic stock market are driven more by domestic factors. These macroeconomic factors considered to be emphasized as the policy instruments by the governments in order to stabilize Islamic stock prices

Hubungan Keaktifan Siswa dalam Kegiatan Ekstrakurikuler dan Perilaku Belajar dengan Hasil Belajar Geografi Kelas XI Is SMA Negeri 5 Banda Aceh

Penelitian ini berjudul hubungan keaktifan siswa dalam kegiatan ekstrakurikuler dan perilaku belajar dengan hasil belajar geografi kelas XI IS SMA Negeri 5 Banda Aceh. Rumusan masalah dalam penelitian adalah apakah terdapat hubungan yang positif dan signifikan antara keaktifan siswa dalam ekstrakurikuler dan perilaku belajar dengan hasil belajar geografi. Hipotesis penelitian adalah terdapat hubungan positif dan signifikan antara keaktifan siswa dalam ekstrakurikuler dan perilaku belajar dengan hasil belajar geografi. Populasi dan sampel penelitian berjumlah 31 orang dengan kriteria pengambilan sampel secara purposive sampling. Teknik analisis data dilakukan dengan menggunakan koefisien korelasi ganda, koefisien determinasi ganda, uji F dan regresi ganda. Berdasarkan hasil pengolahan data diperoleh nilai koefisien korelasi ganda antara keaktifan siswa dalam ekstrakurikuler dan perilaku belajar dengan hasil belajar geografi sebesar 0,72 yang berarti terdapat korelasi positif dengan tingkat hubungan sedang. Nilai koefisien determinasi ganda sebesar 51,84% sisanya 48,16% ditentukan faktor lain. Hasil pengujian signifikansi diperoleh Fhitung > Ftabel yaitu 21 > 4,27 yaitu terima Ha. Artinya terdapat hubungan yang positif dan signifikan antara keaktifan siswa dalam kegiatan ekstrakurikuler dan perilaku belajar dengan hasil belajar geografi kelas XI IS SMA Negeri 5 Banda Aceh. Artinya semakin baik keaktifan siswa dalam kegiatan ekstrakurikuler dan perilaku belajar maka semakin baik pula hasil belajar geografi

Pemanfaatan Ketan Hitam dalam Pembuatan Kopi Bubuk

The purpose of this research was to obtain precise ratio between coffee bean and black sticky rice to reach result the most preferred coffee by panelists and comply standard quality of coffee product. This research used a Complete Randomized Design (CRD) with 5 treatments and 3 replications. The Treatments were BKKH0 (100% Coffee), BKKH1(90% Coffee and 10% Black sticky Rice) BKKH2 (80% Coffee and 20% Black sticky Rice), BKKH3 (70% Coffee and 30% Black sticky rice), BKKH4 (60% Coffee and 40% Black sticky rice). The Collected Data was analyzed statistically with analysis of variance (ANOVA) and Duncan's New Multiple Range Test (DNMRT) at 5% stage. The research showed, the application of coffee and black sticky rice had significant effect to water content, ash content, antioxidant content, caffeine content and organoleptic test. The best treatment of this research was treatment BKKH4 which had a water content 4,23%; ash content 3,51%; antioxidant content 12,60 µg/ml, and caffeine content 1,24%. It was described as brown coloured and coffee scent for it's powder, then black coloured and had coffee scent for the coffee. It was also the most preffered by panelists according the over all assessment