The current climate and weather patterns are very extreme. This kind of weather condition can harm many people. In recent years, heavy rains have resulted in flooding. So far, computers can be used to help people solve problems. The smarter the system and the higher the level of information handling, the more active the role played by the Weather computer is the condition of the air at a certain time and in a certain area that is relatively narrow and in a short period of time. The weather is formed from a combination of weather elements and the weather period can only be a few hours. For example morning, afternoon, or evening, and the situation can be different for each place and every hour. The purpose of this research is to help predict the weather as information. This research uses the Mamdani method. This Mamdani method uses 4 stages to produce an output value, namely, determining the input value (fuzzification), determining the value of x (implication function application), Combination of Rules (Rules), and finally determining the final value or (Defuzzification). This research produces an output value of 35 which is located in the Panas range.

Information technology era requires speed and processing to obtain information. Users are required to quickly obtain and process information as needed. The use of the internet covers many fields of education but the use of the internet also covers the scope of business and transactions. Development of internet technology is widely used in business and sales transactions. Because the internet can create new entrepreneurs. Internet-based social media is an application service that is widely used as a means for the purpose of publishing a service or product. In the implementation of the service, the pre-test method was used which was given to the mothers of the village of RT 03 RW 01 by giving a questionnaire to measure their understanding of social media. Furthermore, given the delivery of material on understanding social media and the internet. The next method is carried out in practice to implement it. This will provide benefits in understanding social media and the internet for business ventures, both businesses that are established individually or in groups. Because social media can be used as a promotional media, see market developments, provide experiences for consumers and serve as social media for competitors. The results obtained from this service, the community / village mothers have business facilities, namely using the social media Facebook. With this media, the native mothers of the village can promote or sell their products there.. Keywords: internet; social media; transactions  Abstrak: Era teknologi informasi memerlukan kecepatan dan pemrosesan untuk mendapatkan informasi. Pengguna dituntut untuk lebih cepat memperoleh dan mengolah informasi sesuai kebutuhan. Penggunaan internet mencangkup banyak bidang pendidikan tetapi penggunaan internet juga mencangkup lingkup bidang usaha dan transaksi.Perkembagan teknologi internet banyak digunakan dalam bidang usaha dan transaksi penjualan. Kerena internet bisa menciptakan para enterpreneur yang baru. Internet berbasis media sosial merupakan suatu layanan aplikasi yang banyak dimanfaatkan sebagai sarana untuk tujuan mempublikasikan suatu jasa atau produk. Dalam pelaksanaan pengabdian digunakan metode pra test yang diberikan kepada ibu-ibu tiban kampung RT 03 RW 01 dengan memberikan koesioner untuk mengukur pemahaman tentang media social. Selanjutnya diberikan penyampaian materi tentang pemahaman media social dan internet. Metode selanjutnya di lakukan pelaksaan prakterk untuk mengimplemantasikannya.  Hal ini akan memberikan pemanfaatand dalam pemahaman media social dan internet  untuk usaha bisnis, baik usaha yang didirikan secara individual maupun kelompok. Karena media sosial dapat dijadikan suatu media promosi, melihat perkembangan pasar, memberikan pengalaman bagi konsumen dan sebagai media sosial kompetitor. Hasil yang didapat dari pengabdian ini, masyarakat/ibu-ibu tiban kampung mempunyai sarana usaha yaitu menggunakan media sosial facebook. Dengan media tersebut ibu-ibu tiban kampung dapat mempromosikan atau menjual produknya di sana. Kata kunci : media sosia; internet; transaksi

In the midst of technological advances today there are still people who are far from technological advances. This community is a native tribe that is on the sea coast by depending on its life from the sea by becoming fishermen. One of the remaining marine tribes on the coast of Batam City is the Tanjung Gundap sea tribe. Therefore, this service is carried out in Tanjung Gundap. Tanjung Gundap is located in Riau Islands, Batam City, Kecamatan Sagulung, Kelurahan Tembesi. This service was given to the community of Tanjung Gundap in RW 01/ RT 02. The service is done by providing guidance to the community about how they can market their home industry which is snacks (kerupuk) that they have processed and can be sold more maximally by utilizing social media in order to reach consumers more broadly. Coaching is done by creating social media and online stores. The coaching was done twice. The first meeting was about the introduction of social media and online stores that can be optimally utilized for the promotion and sale of products. The second coaching is done by creating emails, social media such as facebook, instagram as well as taking online such as shopee. The coaching that has been done can increase the spirit of the community in making home industry products and market optimally.

Kriminalitas merupakan tindakan pelanggaran hukum yang merusak moral dan kehidupan bersosial dalam masyarakat. Tujuan dari penelitian ini adalah untuk memprediksi tingkat kriminalitas sehingga hasil yang di dapat bisa menjadi bahan pertimbangan bagi pihak terkait. Faktor yang menentukan dalam memprediksi tingkat kriminalitas di Kota Batam yaitu tingkat pengangguran, usia dan populasi. Sumber data diperoleh dari badan pusat statistik dan Polresta Barelang Kota Batam. Untuk melakukan proses tingkat kriminalitas, menggunakan fuzzy logic dengan metode mamdani. Variabel input terdiri dari jumlah pengangguran, usia dan jumlah penduduk sedangkan untuk outputnya yaitu tingkat kriminalitas. Adapun tahapan dalam pemrosesannya dilakukan fuzzy logic mamdani yaitu menentukan pembentukan himpunan fuzzy. Penelitian ini menghasilkan tingkat prediksi kriminalitas di Kota Batam pada posisi 49.5 yang berada pada range sedang, dengan jumlah populasi yang diinputkan sebanyak 50, jumlah pengganguran 60, dan usia 50 tahun. Kata Kunci fuzzylogic;mamdani;matlabKeywords Abstract fuzzylogic;mamdani;matlab Crime is an act of violation of the law that damages morals and social life in society. The purpose of this study is to predict the level of crime so that the results can be considered by related parties. The decisive factors in predicting crime rates in Batam City are unemployment, age and population. Sources of data were obtained from the statistical center agency and the Batam City Barelang Police. To do the crime rate process, use fuzzy logic with the Mamdani method. The input variable consists of unemployment, age and population, while the output is the crime rate. The stages in the processing are done by the Mamdani fuzzy logic that is determining the formation of the fuzzy set. This study produces prediction of crime in Batam City at position 49.5 which is in the medium range, with a population of 50 as inputted, 60 unemployment, and 50 years of age.