scholarly journals PENENTUAN PARAMETER DESAIN RODA BESI BERSIRIP MELALUI PENGUKURAN TAHANAN PENETRASI TANAH DI SAWAH (Determining Parameters of Lug Wheels Design by Measurement of Soil Penetration Resistance in Paddy Field)

2015 ◽  
Vol 34 (04) ◽  
pp. 473
Author(s):  
Taufik Rizaldi ◽  
Wawan Hermawan ◽  
Tineke Mandang ◽  
Setyo Pertiwi
Keyword(s):  
Linear Regression ◽  
Reaction Force ◽  
Construction Materials ◽  
Penetration Resistance ◽  
Paddy Fields ◽  
Design Parameters ◽  
Linear Regression Method ◽  
Outer Diameter ◽  
Soil Penetration Resistance ◽  
Plate Size

The objective of this study was to predict the design parameters of lugged wheel that fit through the soil penetration resistance measurement directly in paddy fields. Location of the study was on paddy fields in the village Situ Gede Bogor, West Java. Penetrometer with a plate size of 5 cm x 20 cm is used to press the soil to a depth of 20 cm with inclination press angle of 90o, 75o, 60o, 45o and 30o. Data were analyzed by linear regression method to obtain the relationship between the pressure force and depth presseure for each different inclination of pressure angle. By using the equation of force generated by active lug wheels were touching the soil and the resulting linear regression equation to predict the lugged wheel design for two-wheeled tractor (Yanmar TF85 MLY-in). Tractor assumed to be operating at 15 cm sinkage so that the selected design is a design in which the resulting reaction force able to resist the load supplied by the tractor and implement and used the most minimum construction materials. The results of the calculations recommended number of lugs 12, 45o angle of lugs, width of lugs 10 cm, length of lugs 35 cm, outer diameter wheels 84 cm is the lugged wheel design optimum.Keywords: Lug wheels, force reaction, penetrometer, parameter design ABSTRAKTujuan penelitian ini adalah untuk memprediksi parameter desain roda besi bersirip yang sesuai melalui pengukuran tahanan penetrasi tanah secara langsung di lahan sawah. Lokasi penelitian berada pada lahan sawah di Desa Situ Gede Bogor, Jawa Barat. Penetrometer dengan ukuran plat 5 cm x 20 cm digunakan untuk menekan tanah sampai kedalaman20 cm dengan kemiringan sudut tekan 90o, 75o, 60o, 45odan 30. Data dianalisis dengan metode regresi linier untuk memperoleh hubungan antara gaya penekanan dan kedalaman penekanan untuk tiap sudut penekanan yang berbeda. Dengan menggunakan persamaan gaya yang dihasilkan oleh sirip aktif roda yang menyentuh tanah dan persamaanregresi linier yang dihasilkan maka dapat diprediksi desain roda besi bersirip untuk traktor roda dua (yanmar TF85 MLY-di). Traktor diasumsikan beroperasi pada sinkage 15 cm sehingga desain yang dipilih adalah desain di mana gaya reaksi yang dihasilkan mampu mengatasi beban yang diberikan oleh traktor dan implemen serta penggunaan bahankonstruksi yang paling minimum. Hasil perhitungan merekomendasikan jumlah sirip 12, sudut sirip 45o, lebar sirip 10 cm, panjang sirip 35 cm, diameter luar roda 84 cm adalah desain roda besi bersirip yang optimum. Kata kunci: Roda besi bersirip, gaya reaksi, penetrometer, parameter desain

scholarly journals Tahanan Penetrasi Tanah Terhadap Penekanan Plat Dengan Sudut Penekanan dan Ukuran Plat yang Berbeda di Sawah

2018 ◽  
Vol 1 (2) ◽  
pp. 238-243
Author(s):  
Taufik Rizaldi ◽  
Sumono Sumono
Keyword(s):  
Water Content ◽  
Bulk Density ◽  
Rice Field ◽  
Compressive Force ◽  
Field Measurements ◽  
Penetration Resistance ◽  
Paddy Fields ◽  
Soil Penetration Resistance ◽  
Plate Size ◽  
Measuring Plate

Penelitian dilakukan di Desa Lubuk Bayas Kecapamatan Perbaungan Kabupaten Serdang Bedagai pada lahan sawah bertekstur lempung berpasir dengan kadar air 49.17% dan dry bulk density 1.26 g/cm3. Tahanan penetrasi tanah ditentukan melalui pengukuran tahanan penetrasi plat dengan menggunakan penetrometer secara langsung di sawah. Pengukuran dilakukan dengan ukuran plat 5x5 cm2, 5x10 cm2, 5x15 cm2 dan 5x20 cm2. Sudut penekanan 90o, 75o, 60o, 45o, 30o dan kedalaman penekanan 4 cm, 8 cm, 12 cm, 16 cm dan 20 cm. Dari hasil pengukuran diperoleh bahwa semakin besar ukuran plat maka gaya penekanan semakin besar namun tahanan penetrasi tanah semakin kecil. Sedangkan semakin dalam plat masuk ke tanah maka tahanan penetrasi tanah semakin besar. Semakin besar sudut penekanan tahanan penetrasi tanah semakin besar. Untuk ukuran plat, sudut tekan dan kedalaman penekanan plat yang sama pada kedalaman lumpur yang berbeda akan menghasilkan gaya penekanan dan tahanan penetrasi tanah yang berbeda. The study was conducted in Lubuk Bayas Village, Perbaungan Subdistrict, Serdang Bedagai District, in paddy fields with sandy clay texture with a water content of 49.17% and dry bulk density of 1.26 g / cm3. Soil penetration resistance iwas determined by measuring plate penetration resistance using a penetrometer directly in the rice field. Measurements were made with a plate size of 5x5 cm2, 5x10 cm2, 5x15 cm2 and 5x20 cm2. The angle of emphasis was 90o, 75o, 60o, 45o, 30o and the depth of emphasis was 4 cm, 8 cm, 12 cm, 16 cm and 20 cm. Results showed that the larger the plate size found, the greater the compressive force, but the penetration resistance of the soil got smaller. Whereas the deeper the plate entered the ground, the greater the penetration resistance of the soil occurred. The greater the angle of suppression the greater the penetration penetration of the soil. For the plate size, the pressure angle and depth of the same plate compression at different mud depths will result in a different force of suppression and soil penetration resistance.

Modeling of soil penetration resistance using multiple linear regression (MLR)

2017 ◽  
Vol 10 (20) ◽  
Author(s):  
Anis Elaoud ◽  
Hanen Ben Hassen ◽  
Nahla Ben Salah ◽  
Afif Masmoudi ◽  
Sayed Chehaibi
Keyword(s):  
Linear Regression ◽  
Multiple Linear Regression ◽  
Penetration Resistance ◽  
Soil Penetration Resistance

Rainfall Prediction in South-Eastern Part of Bangladesh by Linear Regression Method

2018 ◽  
Vol 6 (6) ◽  
pp. 119
Author(s):  
Mohammad Shohidul Islam ◽  
Sultana Easmin Siddika ◽  
S M Injamamul Haque Masum
Keyword(s):  
Linear Regression ◽  
Correlation Coefficients ◽  
Rain Gauge ◽  
Regression Method ◽  
Linear Regression Method ◽  
Climate Data ◽  
Rainfall Forecasting ◽  
Statistical Parameters ◽  
Time Duration ◽  
Rainfall Prediction

Rainfall forecasting is very challenging task for the meteorologists. Over the last few decades, several models have been utilized, attempting the successful analysing and forecasting of rainfall. Recorded climate data can play an important role in this regard. Long-time duration of recorded data can be able to provide better advancement of rainfall forecasting. This paper presents the utilization of statistical techniques, particularly linear regression method for modelling the rainfall prediction over Bangladesh. The rainfall data for a period of 11 years was obtained from Bangladesh Meteorological department (BMD), Dhaka i.e. that was surface-based rain gauge rainfall which was acquired from 08 weather stations over Bangladesh for the years of 2001-2011. The monthly and yearly rainfall was determined. In order to assess the accuracy of it some statistical parameters such as average, meridian, correlation coefficients and standard deviation were determined for all stations. The model prediction of rainfall was compared with true rainfall which was collected from rain gauge of different stations and it was found that the model rainfall prediction has given good results.

An alternative model of the vibronic coupling in octahedral complexes

1988 ◽  
Vol 53 (6) ◽  
pp. 1134-1140
Author(s):  
Martin Breza ◽  
Peter Pelikán
Keyword(s):  
Linear Regression ◽  
Alternative Model ◽  
Potential Surface ◽  
Analytical Formula ◽  
Coupling Model ◽  
Regression Method ◽  
Vibronic Coupling ◽  
Linear Regression Method ◽  
Active Systems ◽  
Jahn Teller

It is suggested that for some transition metal hexahalo complexes, the Eg-(a1g + eg) vibronic coupling model is better suited than the classical T2g-(a1g + eg) model. For the former, alternative model, the potential constants in the analytical formula are evaluated from the numerical map of the adiabatic potential surface by using the linear regression method. The numerical values for 29 hexahalo complexes of the 1st row transition metals are obtained by the CNDO/2 method. Some interesting trends of parameters of such Jahn-Teller-active systems are disclosed.

scholarly journals Mortars with Recycled Aggregates from Building-Related Processes: A ‘Four-Step’ Methodological Proposal for a Review

2021 ◽  
Vol 13 (5) ◽  
pp. 2756
Author(s):  
Federica Vitale ◽  
Maurizio Nicolella
Keyword(s):  
Building Materials ◽  
Thermal Analyses ◽  
Construction Materials ◽  
Physical And Mechanical Properties ◽  
Research Trends ◽  
Mix Design ◽  
Recycled Aggregates ◽  
Design Parameters ◽  
Natural Aggregates ◽  
By Products

Because the production of aggregates for mortar and concrete is no longer sustainable, many attempts have been made to replace natural aggregates (NA) with recycled aggregates (RA) sourced from factories, recycling centers, and human activities such as construction and demolition works (C&D). This article reviews papers concerning mortars with fine RA from C&D debris, and from the by-products of the manufacturing and recycling processes of building materials. A four-step methodology based on searching, screening, clustering, and summarizing was proposed. The clustering variables were the type of aggregate, mix design parameters, tested properties, patents, and availability on the market. The number and the type of the clustering variables of each paper were analysed and compared. The results showed that the mortars were mainly characterized through their physical and mechanical properties, whereas few durability and thermal analyses were carried out. Moreover, few fine RA were sourced from the production waste of construction materials. Finally, there were no patents or products available on the market. The outcomes presented in this paper underlined the research trends that are useful to improve the knowledge on the suitability of fine RA from building-related processes in mortars.

Automated simulation techniques for uncovering high-performance bioinspired cellular structures under blast loads

2021 ◽  
pp. 109963622110204
Author(s):  
Abdallah Ghazlan ◽  
Tuan Ngo ◽  
Tay Son Le ◽  
Tu Van Le
Keyword(s):  
Energy Dissipation ◽  
Trabecular Bone ◽  
Reaction Force ◽  
Blast Loading ◽  
Performance Criteria ◽  
Superior Performance ◽  
Cellular Structures ◽  
Design Parameters ◽  
Engineering Practice ◽  
Automated Simulation

Trabecular bone possesses a complex hierarchical structure of plate- and strut-like elements, which is analogous to structural systems encountered in engineering practice. In this work, key structural features of trabecular bone are mimicked to uncover effective energy dissipation mechanisms under blast loading. To this end, several key design parameters were identified to develop a bone-like unit cell. A computer script was then developed to automatically generate bone-like finite element models with many combinations of these design parameters, which were simulated under blast loading. The optimal structure was identified and its performance was benchmarked against traditional engineered cellular structures, including those with hexagonal, re-entrant and square cellular geometries. The bone-like structure showed superior performance over its engineered counterparts using the peak transmitted reaction force and energy dissipation as the key performance criteria.

The Accuracy Assessment of Weapon System Using Grey Linear Regression Method

2012 ◽  
Vol 268-270 ◽  
pp. 1809-1813
Author(s):  
Dai Yu Zhang ◽  
Bao Wei Song ◽  
Zhou Quan Zhu
Keyword(s):  
Linear Regression ◽  
Fuzzy Theory ◽  
Accuracy Assessment ◽  
Regression Method ◽  
Small Sample ◽  
Easy Access ◽  
Linear Regression Method ◽  
Grey Theory ◽  
Weapon System ◽  
Complex Engineering

The accuracy assessment of weapon system is always a complex engineering. How to make the most of the information given in only a few tests and obtain reasonable estimate is always a problem. Based on the fuzzy theory and grey theory, a grey linear regression method is presented. From the numerical example, we can see that this method provides an easy access to deal with data in small sample case and may have potential use in the analysis of weapon performance.

Shallow Water Table Fluctuations in Relation to Soil Penetration Resistance

Ground Water ◽  
2003 ◽  
Vol 41 (7) ◽  
pp. 964-972 ◽  
Author(s):  
James B. Shanley ◽  
K. Niclas Hjerdt ◽  
Jeffrey J. McDonnell ◽  
Carol Kendall
Keyword(s):  
Shallow Water ◽  
Water Table ◽  
Penetration Resistance ◽  
Shallow Water Table ◽  
Water Table Fluctuations ◽  
Soil Penetration Resistance

scholarly journals Demineralization Depth Using QLF and a Novel Image Processing Software

2010 ◽  
Vol 2010 ◽  
pp. 1-7 ◽  
Author(s):  
Jun Wu ◽  
Zachary R. Donly ◽  
Kevin J. Donly ◽  
Steven Hackmyer
Keyword(s):  
Image Processing ◽  
Linear Regression ◽  
Polarized Light ◽  
Region Of Interest ◽  
Linear Regression Method ◽  
Percent Loss ◽  
Significant Linear Correlation ◽  
Processing Software ◽  
Image Processing Software ◽  
Imagej Software

Quantitative Light-Induced fluorescence (QLF) has been widely used to detect tooth demineralization indicated by fluorescence loss with respect to surrounding sound enamel. The correlation between fluorescence loss and demineralization depth is not fully understood. The purpose of this project was to study this correlation to estimate demineralization depth. Extracted teeth were collected. Artificial caries-like lesions were created and imaged with QLF. Novel image processing software was developed to measure the largest percent of fluorescence loss in the region of interest. All teeth were then sectioned and imaged by polarized light microscopy. The largest depth of demineralization was measured by NIH ImageJ software. The statistical linear regression method was applied to analyze these data. The linear regression model wasY=0.32X+0.17, whereXwas the percent loss of fluorescence andYwas the depth of demineralization. The correlation coefficient was 0.9696. The two-tailed t-test for coefficient was 7.93, indicating theP-value=.0014. TheFtest for the entire model was 62.86, which shows theP-value=.0013. The results indicated statistically significant linear correlation between the percent loss of fluorescence and depth of the enamel demineralization.

Perancangan Aplikasi Prediksi Jumlah Pendaftar Siswa Baru Dengan Metode Regresi Linier (Studi Kasus: SMA RK Deli Murni Bandar Baru)

2020 ◽  
Vol 3 (3) ◽  
pp. 330-334
Author(s):  
Novita Ria Lase ◽  
Fristi Riandari
Keyword(s):  
Linear Regression ◽  
Regression Method ◽  
Point Of View ◽  
Computational Techniques ◽  
Linear Regression Method ◽  
Simple Linear Regression ◽  
Tuition Fees ◽  
Use Of Data ◽  
New Students ◽  
New Student

The problem of the SMA RK Deli Murni Bandar Baru school is to predict how many facilities that need to be provided for new students such as chairs, tables and others. This study discusses the prediction of the number of new student registrants at SMA RK Deli Murni Bandar Baru based on the amount of tuition fees using a simple linear regression method. From a commercial point of view, the use of data mining can be used to handle the explosion of data volumes, using computational techniques can be used to produce information needed which is an asset that can increase the competitiveness of an institution. Prediction is almost the same as classification and estimation, except that in the prediction the value of the results will be in the future. This system can be used to predict the number of applicants in the following year to help the school. The advantage is that this simple linear regression method is very simple so that it is easy to calculate and use. Saves the time needed to solve problems, especially those that are very complex.

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