Smoking is one of the public health problems in Indonesia by remembering that smoking is one of the main risk factors of several chronic diseases that can lead to death. Smoking among adolescents is caused by curiosity or trying out new experiences, trying to eliminate boredom, wanting to be considered more male and want to be accepted in the group. The purpose of this study was to analyze the effect of the use of whatsapp social media and booklets on knowledge about cigarettes and student attitudes at SMA Negeri 13 Medan. This research is a quasi experimental study. The study population was all students of SMAN 13 Medan class 11 in 2018/2019 with 128 male students and the sample was 21 male students for the social media group WA) and 21 male students for the booklet group. Data analysis methods used in this study consisted of univariate and bivariate analyzes. The results were obtained as follows: 1) The use of whatsapp social media affected the knowledge of cigarettes and student attitudes, 2) The use of booklet media influenced the knowledge of cigarettes and student attitudes. From the research results obtained, suggestions are given that students can increase their knowledge through a number of ways including finding information through internet media or books relating to smoking and smoking as well as the dangers posed by smoking so that they can understand it and change attitudes towards more and produce good behavior, also. AbstrakMerokok merupakan salah satu masalah kesehatan masyarakat di Indonesia dengan mengingat bahwa merokok merupakan salah satu faktor risiko utama dari beberapa penyakit kronis yang dapat mengakibatkan kematian.Merokok dikalangan remaja disebabkan oleh rasa ingin tahu atau mencoba-coba pengalaman baru, mencoba menghilangkan kejenuhan, ingin dianggap lebih jantan dan ingin diterima dikelompoknya. Tujuan dari penelitian ini adalah untuk menganalisis pengaruh penggunaan media sosial whatsapp dan booklet terhadap pengetahuan tentang rokok dan sikap siswa di SMA Negeri 13 Medan. Penelitian ini merupakan penelitian eksperimen semu. Populasi penelitian adalah seluruh siswa SMAN 13 Medan kelas 11 tahun ajaran 2018/2019 sebanyak 128 orang laki-laki dan sampel diperoleh sebanyak 21 siswa laki-laki untuk kelompok media sosial WA) dan 21 siswa laki-laki untuk kelompok booklet. Metode analisa data yang digunakan dalam penelitian ini terdiri dari analisa univariat dan bivariat. Hasil penelitian diperoleh sebagai berikut: 1) Penggunaan media sosial whatsapp berpengaruh terhadap pengetahuan tentang rokok dan sikap siswa, 2) Penggunaan media booklet berpengaruh terhadap pengetahuan tentang rokok dan sikap siswa. Dari hasil penelitian yang diperoleh disampaikan saran yaitu siswa dapat menambah pengetahuannya melalui beberapa cara diantaranya dengan mencari informasi melalui media internet atau buku yang berkaitan dengan rokok dan merokok serta bahaya yang ditimbulkan akibat merokok sehingga dapat memahaminya dan merubah sikap kearah yang lebih dan menghasilkan perilaku yang baik pula.

Hyperemesis gravidarum is nausea, vomiting that occurs until 20 weeks' gestation, vomiting is so severe that everything that is eaten and drunk is vomited so that it affects general circumstances and daily work, weight loss, dehydration and acetone in the urine not due to diseases such as appendicitis, pielitis, and so on. This study aims to determine the risk factors for age, gravida, nutritional status and multiple pregnancy against the incidence of hyperemesis gravidarum (case control study in Aceh Tamiang District Hospital 2018). This research was conducted in January 2018-December 2018. The type of research used was analytic observational research with a case-control approach. The population in this study were all pregnant women with a diagnosis of hyperemesis gravidarum treated in the obstetric room of Aceh Tamiang Regional Hospital since January-December 2018 obtained from the hospital's medical record data of 94 people. The sample in this study was divided into two, namely 94 case samples and 94 control samples. Based on statistical tests, the results show that there is a relationship between age and hyperemesis gravidarum with ρ value = 0,000. Value of p = 0,000 which is smaller than a = 0.05, there is a relationship between gravida factor and the occurrence of hyperemesis gravidarum with ρ value = 0,000. Value p = 0,000 which is smaller than a = 0.05, there is a relationship between nutritional status factors and the incidence of hyperemesis gravidarum with ρ value = 0.001. P value = 0.001 which is smaller than a = 0.05 and there is no relationship between multiple pregnancy factors and hyperemesis gravidarum with a value of value = 0.274. Value of p = 0.274 which is greater than a = 0.05 in Aceh Tamiang District Hospital. The researcher suggests that this research can be information in providing maximum services in health facilities and sources of broadening insight for education.  AbstrakHiperemesis gravidarum adalah mual muntah yang terjadi sampai umur kehamilan 20 minggu, muntah begitu hebat dimana segala apa yang dimakan dan diminum dimuntahkan sehingga mempengaruhi keadaaan umum dan pekerjaan sehari-hari, berat badan menurun, dehidrasi dan terdapat aseton dalam urin bukan karena penyakit seperti appendisitis, pielitis, dan sebagainya.Penelitian ini bertujuan untuk mengetahui faktor risiko umur, gravida, status gizi dah kehamilan ganda terhadap kejadian hiperemesis gravidarum (studi kasus control di RSUD Aceh Tamiang Tahun 2018). Penelitian ini di laksanakan bulan Januari 2018-Desember 2018. Jenis penelitian yang digunakan adalah penelitian observasi analitik dengan pendekatan case-control. Populasi dalam penelitian ini adalah seluruh ibu hamil dengan diagnosa hiperemesis gravidarum yang di rawat di ruang kebidanan RSUD Aceh Tamiang sejak januari-desember 2018 yang diperoleh dari data rekam medik rumah sakit tersebut sebanyak 94 orang. Sampel dalam penelitian ini terbagi 2 yaitu sampel kasus sebanyak 94 orang dan sampel kontrol sebanyak 94 orang. Berdasarkan uji statistik diperoleh hasil ada hubungan faktor umur dengan kejadian hiperemesis gravidarum dengan nilai ρ value = 0,000. Nilai p= 0,000 yang lebih kecil dari a= 0,05, Ada hubungan faktor gravida dengan kejadian hiperemesis gravidarum dengan nilai ρ value = 0,000. Nilai p= 0,000 yang lebih kecil dari a= 0,05, Ada hubungan faktor status gizi dengan kejadian hiperemesis gravidarum dengan nilai ρ value = 0,001. Nilai p= 0,001 yang lebih kecil dari a= 0,05 dan Tidak ada hubungan faktor kehamilan ganda dengan hiperemesis gravidarum dengan nilaiρ value = 0,274. Nilai p= 0,274 yang lebih besar dari a= 0,05 Di RSUD Aceh Tamiang. Peneliti menyarankan agar penelitian ini dapat menjadi informasi dalam pemberian pelayanan yang maksimal dalam fasilitas kesehatan dan sumber memperluas wawasan bagi pendidikan.

Garbage is the consequence human activity in the form of disposal or waste. There are 2000 tons of garbage per day in Medan, and most of the garbage which comes from people’s homes and is produced by housewives reaches to 1,500 to 1,600 tons per day.  which is caused by several factors that are predisposition, enabler and amplifier. The objective of the research was to find out some factors which were correlated with the behavior of action throwing garbage at Lingkungan IV, Kelurahan Helvetia, Medan Helvetia, in 2017. The population was178 people, and 123 of them were used as the samples. The research used observational analytic method with cross sectional design. The data were analyzed by using univariate anaslysis, bivariate analysis, and multivariate analysis. The result of the research showed that there was the correlation of knowledge (p-value = <0.001), attitude (p-value = 0.004), education (p-value = <0.001), availability of facility (p-value = <0.001), socialization of health care providers (p-value = <0.001), and knowledge about perda no 6 year 2015 (p-value = <0.004) of throwing garbage. The variable which had the most dominant correlation with of throwing garbage was knowledge which 8.6 times of the possibility to be a good behavior in throwing garbage compared with those who had bad knowledge. It is recommended that the Government do regular evaluation and promote environmental health by making public figures participate in good behavior of throwing garbage.Keywords: Predisposition, Enabling, Enforcing, Action   Throwing Garbage

Smart Campus can be defined as a concept that uses technology in campus life that consists of complex system interactions to support its’s user primary needs, push to achieve higher skill, and motivate problem-solving. Many campuses failed in an attempt to implement a smart campus because of unreadiness in the transformation to be a smart campus. To assess smart campus readiness, assessment is needed using the instrument of smart campus readiness model which evaluate supporting instrument of several aspects which is people and living, economy, energy, environment, and mobility. This smart campus readiness model is developed by combining the smart campus model of Pagliaro and the smart city readiness framework from the smart city council. A smart campus readiness instrument is developed to assess the supporting factor of smart campus indicator in people and living aspect. People and living is an aspect that is directly involved by the improvement of people’s living quality as the user of a smart campus. The instrument is tested for validity to make sure it is used correctly to assess smart campus readiness. The instrument is tested for reliability so it can be used as an assessment instrument of smart campus readiness in another place.

Liner equations with n variables can be solved if there are n equations, the matrix is formed n x n square matrix, using the inverse matrix method. In this research, the linear equation used comes from the rod and mesh grounding system method, which is solved by the finite element method to calculate the grounding impedance, from the results of other research researchers. Here the researcher wants to inform in this study how to solve the linear equation with a calculation program. And the research results are plotted in Cartesian coordinates V = V (t). The results of this calculation program can be used to estimate how much the transient voltage is in the ground rod / mesh in the place where the electrical power system substation will be built when lightning strike with an amplitude of 34 kA/switching with a current of 34 kA/step with a current of 34 kA crash it. To adjust the transient voltage by adjusting the length of the finite element, required in accordance with the applicable safety level, while the subsequent arrangement can by increasing the number of mesh or increasing the length of the mesh.