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The development of technology allows one to obtain other people's spatial position data. One mobile technology that utilizes spatial data as a supported factor is location-based services. The large number of employees at the PT.XYZ causes the presence of a controlled process to be under control, and even tends to be questioned. Because it takes a GPS-based presence system on android that is expected to be a solution of the problems that occur at this time. The system development method used is a six-step R&D method, consisting of: Research and information gathering, Planning, Development of initial product forms, initial field testing, major product revisions, main field testing. The final result is the prototype of the Ganesha Employee Presence System Operations. The test results on the system shows the employee attendance system can run on the android platform. The system only responds to presence based on the position of the employee's coordinates with office coordinates. Besides checking the presence process is also based on devices that have been approved in the system. 

Augmented Reality (AR) and Virtual Reality (VR) which are one of the top ten strategic technology trends for 2019 and continue to be developed massively in this 2020, have been widely applied in various mobile applications by many companies in this industrial revolution era 4.0. AR can be applied to help the promotion for housing developers where users can see the 3-dimensional shape of the types of houses offered, while VR allows users to explore each part of the house in a virtual 3D. Pre-existing brochures are used as markers for this application to work, so that AR and VR applications can be a complement to promotional media. The design method used in this paper is Research and Development (RnD). Salespeople can offer types of houses to prospective customers without having to print multiple brochures, but with just one brochure and one android smartphone to present, so the promotion costs are more efficient.   Keywords: AR, VR, house.

The development of smartphones today is very rapid and can not be separated in everyday life in finding information or making information and in all fields of work requires communication tools to access data and information, it is no wonder in terms of smartphone work being an inseparable part separate, this research I use smartphone especially Android which is currently one of the operational systems that are commonly used by the public especially Indonesia so that it can be used to help team performance in the field in this case Merchandiser in conducting Data Processing Asset Material Promotion Using Qr Code to monitor and control the allocation of promotional material assets in the field to facilitate reporting of promotional material assets. QR Code is a two-dimensional matrix code or barcode that comes from the word "Quick Response", where the contents of the code can be deciphered quickly and precisely, Optimizing the use of applications in this case QR code to facilitate monitoring and control of promotional materials in the field which will help merchandiser to help make it easier to do work in the field and directly connected to the admin computer at the head office, so it will be easy, fast, and accurate.

In the daily use of technology, humans cannot be separated from the internet as a need to exchange information. People at this time spend more time in front of computer screens, laptops, even smartphones to find out information, send data to some of their friends. One of the information that is often sought or sent is a file. Apart from that, image files are files that are much searched for and sent, and many also contain important information in them. Image file security is of course very important so that unauthorized parties do not hack or manipulate information from the image. There is a way to secure information so that it does not leak to unauthorized parties, namely by using cryptography and steganography. By combining these two methods, you can maintain the confidentiality and security of a file, especially image files. In this study the algorithm and method used is the AES cryptographic algorithm (Advanced Encryption Standard) 256 and the LSB (Least Significant Bit) steganography method. Data integrity needs to be tested to ensure that the encryption and decryption processes are running properly. Data integrity testing uses the SHA-1 method. Likewise, the image quality after insertion will experience a decrease in quality. To evaluate this, it is necessary to test using the PSNR method. From the results of data integrity testing by comparing the hash value of the decrypted image file with the original image file, there is no difference. So this shows that the encryption and decryption process was successful. While in testing using the PSNR method, the average PSNR value is 44.14086 dB and with an average error value of 2.830403 dB, which means there is a small decrease in quality. From the implementation and testing results, it can be concluded that the AES 256 cryptographic algorithm and the steganography method LSB can be implemented in maintaining the confidentiality and security of secret messages.    

The purpose of this research is to produce tangible results in providing comfort or convenience in turning on or off the night life at home everyday, especially for people who forget to turn off the lights. The method used in making microcontroller-based home lighting control using an android smartphone is. This research method consists of several stages, analysis methods, design methods, implementation testing methods, and maintenance. The results achieved are improving the aspects of comfort and convenience for agencies, where this series of tools works after bluetooth devices are available on android smartphones. connected to a bluetooth module which is connected to the Arduino microcontroller. Basically, the principle of using this tool is that users must be able to operate a smartphone based on the Android operating system. The conclusion of this research is that the Arduino-based light control device using bluetooth can fulfill its function to control the lights properly and the device is designed to be minimalist and safety so it is safe to use.

Pengabdian masyarakat ini dilaksanakan di Karang Taruna Eka Karya yang beralamat di desa Slametan RT 10, RW 04, Gatak, Ngawen, Klaten, Jawa Tengah. Waktu pelaksanaan Pengabdian kepada masyarakat ini yaitu dari tanggal 13 Oktober sampai 15 Oktober 2017. Pengabdian ini dengan berlandaskan pada sebuah penyadaran akan pentingnya sumber daya manusia yang berpotensi untuk masa depan yang lebih baik. Dengan adanya manusia sebagai sumber daya yang sangat berpotensi, maka dari itu, penting adanya sebuah peningkatan ilmu pengetahuan terutama bahasa. Hal itu akan mendampingi mereka dalam proses modernisasi yang semakin banyak membutuhkan pemahaman dan pengertian yang lebih. Penting bagi mereka untuk mendapatkan ilmu bahasa untuk menghadapi modernisasi yang semakin maju. Beberapa permasalahan yang dihadapi para pembelajar bahasa adalah pemikiran bahwa belajar bahasa asing sukar dan membosankan. Bagi mereka yang telah bekerja, belajar bahasa asing dengan mendatangi lembaga bimbingan belajar juga kurang fleksibel waktunya, di masyarakat belum terdapat platform interaktif sebagai media pembelajaran, biaya yang mahal serta beberapa permasalahan lain yang banyak dihadapi oleh pembelajar bahasa. Untuk mengatasi beberapa permasalahan tersebut maka aplikasi mobile untuk belajar Bahasa khususnya bahasa Inggris hadir untuk menjadi solusi bagi masyarakat yang ingin belajar bahasa asing dengan cara yang lebih efektif, efisien dan fleksibel dalam masalah waktu. Para pembelajar bahasa juga dapat belajar bahasa asing dimanapun dan kapan saja mereka suka. Dengan hadirnya Aplikasi mobile tersebut, maka diharapkan akan banyak masyarakat Indonesia baik di kota dan pedesaan yang mampu menguasai bahasa asing dengan cara yang mudah dan menyenangkan.Kata Kunci : Digital Lietarcy, Aplikasi Belajar Bahasa di smarthpone

Sejalan dengan era global ini, saat dibutuhkan informasi yang bersifat mobile. Kemudahan dankecepatan akses saat ini sangat didukung dengan berbagai sarana seperti smartphone. Semakin lama banyakorang yang bermigrasi dalam pemenuhan kebutuhan informasi dari komputer beralih ke smartphone. Halini dikarenakankemudahan dan kepraktisan dalam menggunakannya. Orang tidak harus mengotonggotong laptop dalam mencari informasi, tetapi informasi saat ini telah dalam satu genggaman tangan.Sistem informasi ini dibangun guna mendukung kebutuhan informasi bagi penyelenggarapemerintahan dalam membuat suatu keputusan, adapun informasi yang diolah saat ini berdasarkan kartukeluarga. Aplikasi ini membangun informasi kependudukan pengolahan data perjenis kelamin, programpengolahan data tempat kelahiran, program pengolahan data tahun kelahiran, program pengolahan dataagama, program pengolahan data pendidikan, program pengolahan data status pernikahan, programpengolahan data status hubungan, program pengolahan data kewarganegaraan, program pengolahan dataPekerjaan serta updating data pada kartu keluarga. Hasil dari sistem menunjukkan bahwa kemudahandan validitas data sangat bergantung pada database yang diolah. Sistem ini mampu menyajikan dataolahan yang sangat dibut uhkan oleh para pemanggu pemerintahan. Dari tingkat RT hingga tingkatkecamatan bahkan tingkatan yang lebih tinggi.