Judul: The Calibration Model for Predicting Non- Invasive Blood Glucose Levels by Using the Principal Component of Quantile Regression
Abstrak: Diabetes mellitus (DM), a chronic metabolic disorder, is caused by pancreas inability to produce enough insulin (a hormone that regulates blood glucose) or of which the body cannot use the insulin produced effectively. As a result, there is an increase in the concentration of glucose in the blood (hyperglycemia). If it is not immediately prevented or addressed, DM will induce complications leading to death. DM is one of the global health problems with the fastest-growing emergency in the 21st century, so it is necessary to take preventive actions. Including checking blood glucose levels regularly. Furthermore, blood glucose level test is usually conducted in invasive ways such as by using injection and a glucometer which may injure the body. This method is takes times and spends a big expense. Based on those phenomena, the IPB bio marking team was motivated to develop a noninvasive blood glucose monitoring device that is non-injurious for the body. The development of this blood test requires calibration analysis model. The previous research had shown that there were outlier data on the results of invasive blood glucose levels measurement. However, in the study the outlier data were omitted. The outlier data in this case cannot be simply omitted, because there was suspicion of which a respondent has a blood glucose level that is extremely higher than the normal blood glucose level. The quantile regression method was applied in this case, since the method is robust to outliers and does not need a normal distribution assumption. However, the calibration modeling requires a variable reduction in advance because in general, the calibration data is highly multi collinear in explanatory variables. The method that can be used to solve this problem is the principal component analysis. This study aimed to build a calibration model for predicting non-invasive blood glucose level by using the principal component of Quantile Regression method. The response variable (Y) was the result of invasive measurements in the form of blood glucose levels (mg/dL). The explanatory variable (X) was the result of non – invasive measurement in the form of a spectrum of residual light intensity toward the time domain. This study applied 2017 and 2019 data with different tool designs. In 2017, the design of the tool with the light captured by the sensor was the light transmitted/passed by the bloods. In 2019, the tool designed sensor which captured the light reflected by the bloods. Prior to modeling, data pre-processing was carried out by two approaches. First, the approach was to summarize the area under the residual intensity curve for each periode time (period area). Second, the approach was to summarize the area under the residual intensity curve for each the lamps were on (peak area). The model was constructed by various quantiles and several numbers of principal components which were selected based on various proportions of the cumulative variance. Based on our analysis, overall RMSEP value from summarizing period area data were steadier compared to summarizing of peak area. The sixth quantile had RMSEP value of 0,0184, which was the best in predicting blood glucose level tested
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Judul: Regresi Elastic Net dengan Peringkasan Luas untuk Mengukur Keakuratan Alat Non-Invasive Produk Tahun 2017 dan 2019
Abstrak: Diabetes melitus merupakan salah satu penyakit yang berbahaya karena sulit untuk disembuhkan. Oleh karena itu, pemeriksaan kadar glukosa darah harus rutin dilakukan agar tidak menaikkan tingkat keparahan penyakit diabetes melitus. Tim Non-Invasive Biomarking IPB sedang mengembangkan purwarupa alat ukur kadar glukosa darah secara non-invasive. Saat ini, tim Non-Invasive Biomarking IPB sudah menciptakan 2 alat, yaitu produk tahun 2017 dan tahun 2019 dengan output berbentuk spektrum residu intensitas terhadap time-domain. Oleh karena itu, dibutuhkan pemodelan kalibrasi untuk memprediksi kadar glukosa darah. Metode pemodelan kalibrasi terbaik pada produk tahun 2017 ditemukan oleh Herianti (2020) dengan menggunakan regresi elastic net dengan algoritma detect deviating cell (DDC) untuk mengatasi pencilan. Pada tahun 2019 dilakukan pengukuran kadar gula darah non-invasive dengan alat yang berbeda. Penelitian ini bertujuan untuk menentukan alat yang lebih stabil dalam mengukur kadar gula darah secara non-invasive dari 2 alat yang tersedia, serta untuk menentukan metode peringkasan dari spektrum residu intensitas yang lebih akurat. Alat yang lebih stabil untuk mengukur kadar gula darah secara non-invasive adalah produk tahun 2017. Peringkasan pada penelitian ini menggunakan pendekatan peringkasan luas trapesium dan peringkasan 3 angka. Hasil penelitian menunjukkan bahwa, metode peringkasan terbaik adalah metode peringkasan luas., Diabetes melitus is one of dangerous disease because it’s hard to be cured. This is shows it’s important for everyone to always control and checking their blood glucose levels to prevent make the diabetes melitus is getting worse. Non-invasive biomarking team from IPB currently developing blood glucose device measurement with non-invasive method. Now, the non-invasive biomarking team from IPB already created 2 products, design product for 2017’s and 2019’s with the output in the form of a residual intensity spectrum with respect to the time-domain. Therefore, calibration modeling is needed to predict blood glucose level. The best calibration modeling method for 2017’s device discovered by Herianti (2020) with elastic net regression and DDC algorithm for resolve the outlier. In 2019, measuring the blood glucose level were using different tools. This research aims to determine a more stable tool for measuring the blood glucose level with non-invasive method from 2 available tools, and to determine a more accurate summarization method of the intensity residual spectrum. More stable tool for measuring the blood glucose level is a 2017’s device. The summarization method in this research uses a trapezoidal area and 3 digit summarization approach. The result showed that the best summarization method is trapezoidal area summarization approach.
Keyword: 3 digit summarization, area summarization, detect deviating cell, elastic net, non-invasive

Judul: Budidaya dan pelestarian buaya air tawar irian (Crocodylus novaeguineae)
Abstrak: Di Indonesia terdapat beberapa spesies buaya diantaranya adalah Crocodylus porosus, Crocodylus novaeguineae, Tomistoma schlegelii dan Crocodylus siamenesis. Crocodylus novaeguineae baru ditemukan tahun 1928 di lrian Jaya dan Papua New Guinea oleh Schmidt. Dengan adanya perdagangan kulit buaya maka masyarakat mulai memburu buaya-buaya alam untuk dijual tanpa memperhatikan kelangsungan hidup spesies tersebut. Tempat hidup buaya-buaya inipun semakin sempit karena diubah jadi perladangan, lalu lintas air dan daerah pemukiman sehingga terjadi penurunan jumlah buaya secara cepat.
Keyword: Crocodylus porosus, Crocodylus novaeguineae, Tomistoma schlegelii, Crocodylus siamenesis