Semen merupakan salah satu bahan baku yang amat penting dalam pembangunan infrastruktur. Salah satu perusahaan yang bergerak di bidang produksi semen adalah PT XYZ. Tahapan terpenting dalam proses pembuatan semen adalah pada tahap pembakaran batu kapur dan tanah liat (clinker). Dalam proses pembakaran clinker membutuhkan ba-han bakar utama yaitu batubara. Semakin banyak jumlah produksi clinker yang dihasilkan dan semakin sedikit batubara yang digunakan dalam proses pembakaran, maka semakin efektif dan efisien proses produksi tersebut. Dalam penelitian ini akan dilakukan analisis untuk memprediksi indeks batu-bara dengan beberapa variabel yang diduga mempengaruhi ya-itu kualitas batubara, bahan baku, dan operasional yang kemu-dian akan dilakukan estimasi terhadap indeks batubara. Me-tode yang digunakan untuk mengestimasi indeks batubara ada-lah metode Regresi Ridge dan metode Support Vector Regression (SVR). Model yang terbentuk dengan metode SVR akan dibandingkan dengan metode regresi ridge yang kemudian akan dipilih model terbaiknya diantara kedua model yang ter-bentuk menggunakan nilai RMSE. Hasil analisis didapatkan metode terbaik dengan nilai RMSE terkecil yaitu Support Vector Regression (SVR) dan menggunakan kernel-polynomial yang menghasilkan parameter sigma bernilai 0,100 dan nilai c sebesar 1 dengan nilai RMSE sebesar 0,619.

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Bleeding is one of the most common complaints when coming to the hospital which can be mild to life-threatening. The balance of the impaired hemostasis system allows for abnormal bleeding such as hemorrhagic diathesis. Balance between blood clotting and bleeding is always maintained in the body under normal physiology. The coagulation system stops existing bleeding with vasoconstricts of blood vessels and the formation of early platelet plugs, this blockage is strengthened by the presence of a cascade of coagulations to form stable and sturdy blockages. Once bleeding has stopped, the fibrinolytic pathway is initiated to dissolve the blood clot to restore normal blood flow. balance the coagulants, fibrinolytic and inhibitor systems, creating a perfect physiological balance. Hemostatic imbalance is a global problem that can lead to thrombosis or hemorrhage.

Caries cases are mostly found at the age of development, namely elementary school children. The daily food consumed by school children at home and outside the home is a cariogenic food which is one of the causes of caries. The purpose of this study was to determine the incidence of caries rates that occur in elementary school age children and the dietary pattern of cariogenic food consumed by elementary school aged children in Semarang City.This type of research is analytic observational with a case control study approach. The sample was elementary school children in Tembalang Subdistrict, Semarang City as a group of cases with caries and non-caries as a control group. Cariogenic dietary variables were measured from the sugar content, frequency and consumption method using the Kariogenic Diet Survey. The data analysis used was the Chi-Square Test. Then proceed to test the causal factor analysis using the Odd Ratio.The results of the Odd Ratio showed that children who ate cariogenic foods with a high frequency had a higher caries rate than children who ate cariogenic foods less frequently. Based on the results of data analysis (correlation), it is known that caries and food frequency have a significance value of 0.004 0.05, which means that there is a significant correlation. Furthermore, between caries and food content the significance value is 0.030 0.05, which means that there is a significant correlation.The conclusion of this study is that there is a relationship between the frequency of cariogenic foods and the content of cariogenic foods on the incidence of caries. The higher the frequency of eating cariogenic foods, the higher the incidence of caries. Keywords : cariogenic food,, caries rate