The environment greatly influences the establishment of human character and large urban suburbs are areas inhabited majority by the lower middle class. The main goal in community service is to provide character education through free tutoring for Mathematics and English  for primary school in course center Pencil Generation in Zone V Simalingkar B Sub-District Medan Tuntungan North Sumatera. The method used in process of the character education is the Whole Brain Teaching (WBT) method which is integrated during the teaching and learning process in the course center. The steps taken by the team in order to carry out this activity are as follows: (1). preparation for service activities, (2). provide guidance about characters, (3). forming learning groups based on class, (4). guide children to learn with the Whole Brain Teaching method, (5). sometimes play games related to Mathematics and English. The result of this service is  academic improvement in Mathematics and English. Beside the academic improvement, there is also an increase in character that is manners, perseverance, discipline, tolerance, and caring.

Abstrak: Faktorisasi polinomial merupakan suatu proses penguraian suatu  polinomial berderajat n menjadi polinomial-polinomial lain yang berderajat lebih kecil dari n.  Faktorisasi polinomial atas lapangan hingga  merupakan suatu proses pengerjaan yang relative tidak mudah. Oleh karena itu, diperlukan suatu metode yang berupa algoritma untuk memproses faktorisasi polinomial. Algoritma Faktorisasi Berlekamp merupakan salah satu metode terbaik dalam memfaktorisasi polinomial atas lapangan hingga . Polinomial atas lapangan terbagi dua kategori berdasarkan faktorisasinya, yaitu polinomial square-free dan bukan square-free. Polinomial square-free adalah polinomial dimana setiap faktorisasi tak tereduksi tunggal. Sedangkan bukan square-free adalah sebaliknya. Penelitian ini bertujuan untuk membuat suatu algoritma untuk menfaktorkan polinomial square-free dan bukan square-free atas lapangan hingga. Adapun (Divasὀn, Joosten, Thiemann, & Yamada, 2017) yang menjadi referensi utama dalam penelitian ini adalah berdasarkan. Namun, dibatasi hanya untuk polinomial square-free saja. Untuk itulah dengan menggunakan konsep polinomial faktorisasi ganda. Pada bagian akhir penelitian akan mengimplementasikan algoritma baru yang telah disusun. Abstract:  Polynomial factorization is a decomposition of a polynomial of degree n into other polynomials whose degree is less than n. Polynomial factorization over finite field  is a relatively easy in process. Therefore, it’s needed a method in the form of an algorithm to process polynomial factorization. Algorithm Factorization Berlekamp is one of the best methods in factoring polynomials over a finite field  . Polynomials over field are divided into two category based on its factorization, namely square-free and not square-free polynomials. Square-free polynomials are polynomials in which each irreducible factorization is single. When non square-free is the opposite. This research aims to set an algorithm for factoring square-free polynomials and non square-free polynomials over a finite field   . The main reference in this research is based on (Divasὀn, Joosten, Thiemann, & Yamada, 2017) (Saropah, 2012). However, it is restricted only  to square-free polynomials. For this reason, this research will use the concept of repeated factorization polynomials. At the end of the research will implement a new algorithm that has been set.

Epidemi merupakan suatu keadaan berjangkitnya suatu penyakit menular dalam populasi pada suatutempat yang melebihi perkiraan yang normal dalam periode yang singkat. Penulisan ini membahasmenurunkan model epidemi SIRS dengan time delay melalui model matematika berdasarkan modelepidemi SIRS (Susceptible, Infective, Recovered, Susceptible). Model epidemi mempunyai dua titikkesetimbangan, yaitu adalah titik kesetimbangan bebas infeksi penyakit dan titik kesetimbanganendemi. Syarat dan kestabilan titik kesetimbangan ditentukan oleh bilangan (R0), yaitu nilai yangmenentukan ada atau tidaknya penyebaran infeksi penyakit pada suatu populasi. Hasil penelitiandiketahui bahwa kesetimbangan bebas penyakit stabil global untuk semua > 0 ketika jumlahbilangan R0 < 1. Dapat dikatakan, time delay tidak dapat mempengaruhi kestabilan kesetimbanganbebas penyakit. Dengan kata lain, pengaruh time delay dapat diabaikan untuk R0 < 1. Namun, ketika,R0 > 1 kestabilan kesetimbangan endemi akan dipengaruhi oleh time delay.

The research objective was to measure the relative efficiency value of Medan city health centers using the DEA model and determine the calculation of input and output targets to increase the efficiency value of the inefficient DMU. The research subjects were patients at the Medan City Health Center. The data collection technique was carried out using BPS secondary data. The discussion in this study shows that inefficient health centers, namely Health Center of Medan Tuntungan, Health Center of Medan Johor , Health Center of Medan Polonia, Health Center of Medan Baru, Health Center of Medan Barat, and inefficient target improvements refer to CRS for non-optimal variables. It can be achieved by increasing the number of nurses, increasing the number of midwives, increasing the number of diarrhea patients, adding number of baby births and carried out through socialization activities regarding the relevant puskesmas facilities The inefficient improvements to the Puskesmas repairs were 0.71966, 0.7946, 0.938, 1.1356 and 0.99659.

This community service aims to increase students' enthusiasm in learning sets so that students are interested in learning sets. The method used in this service is the game method in answering questions from the set. The results obtained from service activities using the game method are that students are faster at solving set problems compared to solving problems in a theoretical way. The conclusion that can be drawn from this service activity is that learning math using the game method can teach students to concentrate more in the process of learning math at school.