The concept of data depth has been used for multivariate control charts. One of the advantages of data depth is that statistics constructed independent of the distribution of quality characteristics or is known as free distributions. One of them is depth based on Mahalanobis distance. Individual Mahalanobis distance is essentially formed by the ratio of generalized variance (GV) calculated by not involving the individual to be calculated distances to the mean by GV calculated from the complete data. The Control charts constructed with Mahalanobis Depth can be visualized (exploration) is plot depth over depth, so it is known DD-diagram and create control limits as control chart Shewhart. The main disadvantage of Mahalobis distance lies in GV, the value of GV depends on the sample size and the number of quality characteristics, in addition two different covariance matrices can give the same GV value. Departing from the weakness of GV, this research will be focused on the formation of vector data depth control diagrams (VV), because VV can resolve the GV weaknesses. Based on the simulation study, it shows that both DD-GV and DD-VV control charts give the same pattern in ongoing process of in-control that is forming a straight line through point (0,0) and (1,1), for correlation between weak variables, but for correlation between variables are very strong, the DD-GV control does not expressly state the in control process. The application process control of data in both diagram medical product, indicate that there is a symptom of mean vector or covariance matrix.

Dayeuhkolot Village, in the Sagalaherang Sub-district, Subang District, West Java Province, is striving to become an ecotourism area. One of the products that was intended to be preserved was palm sugar. However, palm trees (Arenga Pinnata) are no longer available in the village. Apart from having economic value, palm trees are important as they are a buffer for the soil since their roots can prevent landslides, which frequently occur at the village during the rainy season. The training program that we implemented to overcome these problems wass the preservation and planting of palm trees. In addition to the training, we also provided 150 palm seeds. To determine the success of tree planting, the team measured the height of the palm trees every month. The results showed that the average growth is 10%. Keywords: conservation, planting, aren trees

Abstract. Multicollinearity is a correlation between independent variables, the existence of multicollinearity is often difficult to see the effect of independent variables on dependent variables. Handling multicollinearity can be done using the Elastic-net regression method where this method can shrink the regression coefficient to zero, besides that Elastic-net regression also performs simultaneous selection of variables and can select groups of correlated variables. In 2020, the open unemployment rate in West Java Province was relatively high, at 10.46, exceeding the national average of 7.07. This study uses data on the open unemployment rate in West Java Province in 2020. Based on the test results of the seven independent variables used, only five independent variables have an influence on the open unemployment rate in West Java, namely the dependency ratio, the average length of schooling, percentage of poor population, district/city minimum wage, and population density. While the independent variable that has no effect on the open unemployment rate is the human development index. Based on the value of the importance variable, the independent variable that has the greatest influence on the open unemployment rate in West Java Province is the district/city minimum wage. Abstrak. Multikolinearitas merupakan korelasi antar peubah bebas, keberadaan multikolinearitas seringkali menyulitkan untuk melihat pengaruh antara peubah bebas terhadap peubah tak bebas. Penanganan multikolinearitas dapat dilakukan menggunakan metode regresi Elastic-net dimana metode ini dapat menyusutkan koefisien regresi tepat nol, selain itu regresi Elastic-net juga melakukan seleksi peubah secara simultan dan dapat memilih kelompok peubah yang berkorelasi. Pada tahun 2020 tingkat pengangguran terbuka di Provinsi Jawa Barat relatif tinggi yaitu sebesar 10,46 melebihi nilai rata-rata nasional sebesar 7,07. Penelitian ini menggunakan data mengenai tingkat pengangguran terbuka di Provinsi Jawa Barat pada tahun 2020. Berdasarkan hasil pengujian dari tujuh peubah bebas yang digunakan hanya lima peubah bebas saja yang memberikan pengaruh tehadap tingkat pengangguran terbuka di Jawa Barat yaitu dependency ratio, rata-rata lama sekolah, presentase penduduk miskin, upah minimum kabupaten/kota, dan kepadatan penduduk. Sedangkan peubah bebas yang tidak memberikan pengaruh terhadap tingkat pengangguran terbuka yaitu indeks pembangunan manusia. Berdasarkan nilai importance variable peubah bebas yang memberikan pengaruh paling besar terhadap tingkat pengangguran terbuka di Provinsi Jawa Barat adalah upah minimum kabupaten/kota.

Tujuan  kegiatan Pengabdian Kepada Masyarakat yang kami lakukan ialah untuk meningkatkan wawasan masyarakat Desa Dayeuhkolot kabupaten Subang Jawa Barat menjadi desa Ekowisata, sehingga ada peningkatan pendapatan daerah serta meningkatkan kesejahteraan masyarakat. Di desa Dayeuhkolot, musibah banjir dan tanah longsor adalah kejadian yang terjadi pada musim hujan. Untuk mengatasi masalah tersebut, maka langkah awal dari kegiatan pengabdian yang kami lakukan adalah melakukan kegiatan tentang pelestarian lingkungan dan kegunaan pohon Enau (Arenga Pinnata). Metode yang kami lakukan adalah dengan sosialisasi, penyuluhan/edukasi tentang lingkungan dan keguanaan dari pohon enau. Untuk mengetahui efektifitas peningkatan pengetahuan sosialisasi dan penyuluhan kami melakukan pretest dan postest, hasil dari pengujian dengan menggunakan statistik uji t dan taraf nyata (α) 5% dapat disimpulkan bahwa sosialisasi dan penyuluhan efektif meningkatkan pengetahuan masyarakat desa Dayeuhkolot.