Estimate of Wave Overtopping Rate on Vertical Wall Using FUNWAVE-TVD Model

This study established a numerical model capable of calculating the wave overtopping rate of coastal structures by nonlinear irregular waves using the FUNWAVE-TVD model, a fully nonlinear Boussinesq equation model. Here, a numerical model was established by coding the mean value approach equations of EurOtop (2018) and empirical formula by Goda (2009), and adding them as subroutines of the FUNWAVE-TVD model. The verification of the model was performed by numerically calculating the wave overtopping rate of nonlinear irregular waves on vertical wall structures and comparing them with the experimental results presented in EurOtop (2018). As a result of the verification, the numerical calculation result according to the EurOtop equation of this model was very well matched with the experimental result in all relative freeboard (Rc/Hmo) range under non-impulsive wave conditions, and the numerical calculation result of empirical formula was evaluated slightly smaller than the experimental result in Rc/Hmo < 0.8 and slightly larger than the experimental result in Rc/Hmo > 0.8. The results of this model were well represented in both the exponential curve and the power curve under impulsive wave conditions. Therefore, it was confirmed that this numerical model can simulate the wave overtopping rate caused by nonlinear irregular waves in an vertical wall structure.

EFEKTIVITAS MODEL PEMBELAJARAN KOOPERATIF DAN MINAT BELAJAR TERHADAP KEWIRAUSAHAAN

Abstrak: Penelitian ini bertujuan untuk mengetahui (1) hasil belajar kewirausahaan yang diajar dengan model pembelajaran kooperatif tipe jigsaw lebih tinggi dibandingkan hasil belajar kewirausahaan yang diajar dengan model pembelajaran kooperatif tipe STAD, (2) secara keseluruhan, siswa yang memilki minat belajar tinggi lebih tinggi hasil belajar kewirausahaan, dibandingkan dengan siswa yang memiliki minat belajar, (3) terdapat interaksi antara model pembelajaran dan minat belajar siswa terhadap hasil belajar kewirausahaan. Metode penelitian yang digunakan adalah quasi eksperimen dengan faktorial 2 x 2. Teknik analisis yang digunakan adalah analisis varian dua jalur dengan taraf signifikansi α = 0,05 dengan Uji F, pengujian lanjut menggunakan Uji Scheffe. Hasil penelitian menunjukkan (1) Hasil belajar kewirausahaan siswa SMK Negeri 8 Medan yang diajar dengan model pembelajaran kooperatif tipe jigsaw lebih tinggi dibandingkan dengan model pembelajaran kooperatif tipe STAD,pada taraf signifikansi α = 0,05 dengan Fh sebesar 6,49 dan Ftabel = 4,00, jadi Fhitung > Ftabel = 6,49 >4,00. Hipotesis telah teruji kebenarannya Ha diterima dan Ho ditolak, (2) hasil perhitungan tentang perbedaan hasil belajar kewirausahaan antara kelompok siswa yang memiliki minat belaja rtinggi dan rendah pada taraf signifikansi α = 0,05 dengan Fh sebesar 28,15 dan Ftabel = 4,00jadi Fhitung> Ftabel = 28,15 >4,00, maka hipotesis telah teruji kebenarannya Ha diterima dan Ho ditolak, (3) besarnya rata-rata hasil belajar kewirausahaan siswa untuk setiap kelompok pembelajaran A1B1 = 91,94dan A1B2 = 78,59 sedangkan A2B1 = 83,06 dan A2B2 = 79,65. Hasil perhitungan Anava factorial 2x2 diperoleh hasil perhitungan Fh = 8,52 dan harga tabel Ft = 4,00 adalah Ft(0,05)(1,64) = 4,00, sehingga dapat dinyatakan Fh (8,52) > Ft (4,00), Kata Kunci: Pengaruh Model, Minat Belajar, Hasil Belajar Kewirausahaan Abstract: This research means to know: (1) The learning result of enterprise of student that thought by JIGSAW type cooperative learning model higher than the result of the enterprise which thought by cooperative learning model STAD type.(2) By all the students who have to learn high interest higher than the result of enterprise study compare with the student who has low-interest learning.(3) There is the interaction between the learning model and the learning interest of students to study enterprise from the student. The technic of taking a sample is used sample Cluster Random Sampling based on student interest so that this research sample in learning group and each group consist of 33 students for the experiment, and 35 students for the control group. The research method which used is experiment quasi with factorial 2x2 analysis technic which used is variant analysis two ways significant level a =0.05 by testing F, the test continues to use scheffe test. The research result mention = (1) learning result of students enterprise that thought with cooperative learning model JIGSAW type higher than cooperative learning model STAD type, at significant level a= 0.05 with Fh as big as 6.49 and = 4 Ftable 00 so Fcount >Ftable=6.49 > 4.00 Hypothesis has tasted its correctness Ha is given and he is refused (2) the calculation result about the difference of learning result enterprise between the group of students who have high study interest and low at a significant level a =0.05 with Fa as big as 28.15 and F table= 4.00 so F count > Ftable =28.15 >4.00 so hypothesis has tested its correctness. Ha is given and Ho is refused,(3) its big average the result of students enterprise learning for each learning group XA1.B1 = 91.94 and XA1 B2 =78.59 whereas XA2B1 =83.06 and XA2B2 =79.65 the calculation result factorial ANOVA 2x2 is received the result of calculation Fh=8.52 and table prise F1=4.00 is Ft (0.05) (1.64)=4.00 Keywords: Effect of Model, Interest Of Student, Result of Enterprise

Implementasi Metode Weighted Moving Average Untuk Sistem Peramalan Penjualan Markas Coffee

Headquarters Coffee is one of the businesses engaged in the culinary field of coffee drinks. The problem that occurs at the Coffee Headquarters is that business activities are still carried out manually. In addition, determining sales in the next period only refers to the sales data of the previous period, resulting in owners often experiencing shortages or excess stocks of coffee to be sold due to uncertain sales. Therefore we need a forecasting method (Forecasting) that is appropriate and can be applied to an Information System in the form of a Website. The purpose of making this forecasting information system is to assist companies in recording sales to make it more practical by applying the Weighted Moving Average (WMA) method. From the results of the calculation of the WMA method, the level of accuracy will then be calculated using the Mean Absolute Percentage Error (MAPE) method. The results of forecasting by applying the WMA method and MAPE calculations on weights 3, 4 and 5 show that the Robusta coffee on the Robusta menu which has the smallest MAPE is weight 3 with a calculation result of 19.2499 and the Robusta Milk menu which has the smallest MAPE is weight 4 with the calculation result is 15.21879166 and Excelsa coffee on the excelsa menu which has the smallest MAPE is weight 3 with a calculation result of 19.1538 and the Excelsa Susu menu which has the smallest MAPE is weight 5 with a calculation of 17.27650182 while for Arabica coffee on the Arabica menu which has the smallest MAPE is weight 4 with a calculation result of 18.1735 and the Arabica Susu menu which has the smallest MAPE is weight 5 with a calculation result of 16.24012072. Where the Mape value produced by each type of coffee is still below 20%, which means the forecasting results can be categorized as good.

Proto-Austronesian historical relations on the development of the proto-melayic aspect of Malay with Lampung language

The purpose of this paper is to determine the facts of language that have historical relations in comparative diachronic linguistics studies. The existence of the Lampung language (LL) as a reflection of the Proto *WPM was initially studied by Dyen 1965 and has been conservative for four decades or forty years old. During those four decades, apart from Dyen 1965, the research results showed 89.1% (Figure 0); there is also Walker's (1976) inference at the observation point of Way Lima Lampung used 200 Swadesh Vocabulary Lexicon, the calculation result is 82.2%. Furthermore, Sudirman and Fernandez, the National Seminar on Austronesian Language and Culture II, studied the "Status of the Komering Isolect in the LL Group" the results of the 82.16 % Dialectometric Lexicostatistics calculations were close to the results of Walker's previous study of 82.2%, so that the historical relation of the isolect with the status of a conservative dialect can be observed in Figure 1. In addition to conservative results, there are also innovative results, namely the occurrence of share retentions and share innovations shown by the results of the 48.5% Dialectometric Lexicostatistics calculation as the realization of the historical relation between Malay Language (ML) and Lampung Language (LL).

Quantitative Model of Optimization on Non-Oil Based Fuel Alternative Energy

Research of “Quantitative Model of Optimization On Non-Oil Based Fuel Alternative Energy” is using goal programing method approach which will generate comprehensive mathematic models to determine policy on alternative energy field beside oil based fuel. The result of the research is sensitivity analytic model and optimization model of nonoil based fuel alternative energy. Developed model is goal programing to optimise alternative energy beside oil based fuel. Model implementation conducted on alternative energy are coal, nature gas and hydro. And the calculation result using Expert Choice Version 9.0 is obtained that coal as alternative energy has relative priority value of 36,8% at overall consistency index 0,04 or 4%. Optimization implemented model conducted at alternative oil based energy plan using calculation of Quantitative System 3.0 program conclude that coal = 9.809274, gas = 0.8409028, hydro = 0. Minimal objective = 18.69225

Benefit Evaluation Model of Prefabricated Buildings in Seasonally Frozen Regions

In order to effectively develop the benefit evaluation model of prefabricated houses in seasonal frozen soil areas, and improve the comprehensive benefits of prefabricated buildings, this paper proposes a life cycle benefit evaluation model for prefabricated buildings in seasonally frozen regions. According to the climatic characteristics of the area, the impact of the seasonally frozen regions is listed as an evaluation index in the construction stage for comprehensive analysis. The 16 indicators that affect the comprehensive benefits of prefabricated buildings are grouped by the nearest neighbor element analysis method. Fuzzy cluster analysis and analytic hierarchy process are used to filter out the most influential index group to calculate the index weight. Then the model proposed in this paper is compared with the existing model to test the validity of the model. The research results show that research and development costs weight is 0.23, design cost weight is 0.10, construction cost weight is 0.22, resource consumption weight is 0.25, building demolition cost weight is 0.04, and seasonal freezing effect weight is 0.16. The calculation result passed the consistency test and the expert scoring result conformed to the normal distribution, which proved the accuracy of the conclusion. It is proposed that the calculation result of the comprehensive benefit score of the model is 1.8% lower than the previous results, which proves the validity of the model. The model can speed up the efficiency of comprehensive benefit evaluation of prefabricated buildings thereby improving the development level of prefabricated buildings.

Analysis of Air Side Needs at Mutiara SIS AL-JUFRI Airport Palu

The city of Palu is the capital of the province of central Sulawesi which has hajj waiting list 0f around 31,384 pilgrims with a qouta of 1986 pilgrims until 2034. Garuda indonesia has prepared four tipes of air craft that will serve these filghts including Boeing B777-300ER, B747-400, A330-300 and A330-200. In this study use the secondary data for the next 10 and 20 years forcasting uses the econometric method. The data needed includes climatology, passenger and air craft characteristic at Mutiara Al Jufri Airport. The standard refers to the ICAO. Based on the calculation result obtained that in the exixting condition, the length and width of the runway is 2,510 x 45 m and the width of taxiway is 23 m and the dimension of the apron are 373 x 311,2 m. In 2027, the length of the runway will be 3786 m with a width of 45m, and the width of taxiway 23 m. Apron dimension 541,5 x 195,5 m2. In 2037, the dimension of the runway and taxiway are still fixed, but the apron dimension changes to 714 x 195,5 m. Keywords: Mutiara Sis Al-Jufri Palu Airport, Runway, Taxiway, Apron

Analysis of Force Distribution of Four Rows of Bolts in Aircraft Fitting Joint

With the help of 3D modeling software and finite element analysis software, the force distribution of four rows of bolts in the aircraft fitting joint is obtained in this paper. In 3D modeling software, the solid model is segmented according to the area and height of the center of gravity of the cross-section. In finite element analysis software, the beam elements are used to replace the segmented model to obtain the internal force applied at the end of the segmented model and the stress-strain state of each segment is calculated according to the internal force applied at the end of each segment. Finally, the force distribution of the four rows of bolts is obtained according to the average force difference on the center section between the bolt rows. In order to ensure the validity of this step-by-step calculation result, it was compared with the entire calculation result. It can be concluded that the force distribution of the two calculations is consistent. Under the working conditions of the fitting joint (130 MPa), the force distribution coefficients of the four rows of bolts are 0.182, 0.215, 0.197, and 0.12. Therefore, it is feasible to use the step-by-step method to calculate the force distribution of the four rows of bolts in the fitting joint. Compared with the entire calculation, the step-by-step calculation has the advantages of less calculation amount and faster calculation speed.

Intercomparison exercise on difficult to measure radionuclides in activated concrete—statistical analysis and comparison with activation calculations

This paper reports the results obtained in a Nordic Nuclear Safety Research project during the second intercomparison exercise for the determination of difficult to measure radionuclides in decommissioning waste. Eight laboratories participated by carrying out radiochemical analysis of 3H, 14C, 36Cl, 41Ca, 55Fe and 63Ni in an activated concrete. In addition, gamma emitters, namely 152Eu and 60Co, were analysed. The assigned values were derived from the submitted results according to ISO 13,528 standard and the performance assessments were determined using z scores. The measured results were compared with activation calculation result showing varying degree of comparability.