<p>Perpustakaan sebagai penyedia layanan kepada para pemustaka atau pengunjung yang membutuhkan metode layanan yang cepat, akurat, mudah dan efisien. Salah satu pengembangan perpustakaan digital berbasis web yang terintegrasi dalam memberikan akses mudah mendapatkan informasi yang cepat, akurat, mudah dan efisien. Metode pengembangan sistem informasi ini menggunakan waterfall, dan UML untuk menggambarkan aktivitas suatu proses sistem yang menggunakan bahasa pemrograman PHP dan database MySQL. Hasil dalam penelitian ini adalah sistem informasi karya ilmiah berbasis web, membuat sistem informasi memberikan layanan alternatif untuk mengatasi hambatan dalam mengakses informasi di perpustakaan. Sistem informasi ini mudah digunakan, data yang disimpan akurat dan terkini.</p><p><em>Library as a service provider to visitors or visitors who need a fast, accurate, easy and efficient service method. One of the development of a web-based digital library that is integrated in providing easy access to get information that is fast, accurate, easy and efficient. This information system development method uses waterfall, and UML to describe the activities of a system process that uses the PHP programming language and MySQL database. The results in this study are web based scientific information systems, making information systems provide alternative services to overcome obstacles in accessing information in the library. This information system is easy to use, the data stored is accurate and up to date.</em></p>

Gamerground is a computer shop engaged in the sale of laptops, computers, spare parts, accessories supporting and providing repair services. The marketing process is less than optimal because it only sells by phone or social media. There are some problems that occur between them : 1. Stock management is not optimal because of frequent discrepancies between stock records with the amount of goods available so often consumers feel disappointed with the services provided, 2. The issue of uploaded ad duration in uploaded social media will alternate from one product content display to another in a relatively short period of time, 3. The absence of management of consumer sales transactions thus requiring recording of repeated transactions, 4. The decline in sales turnover in recent months, 5. The management of customer or consumer data is less noticed. Based on these problems, this study aims to design a web-based online sales information system mobile on gamerground. This research uses the development of SDLC waterfall model system which consists of planning, analysis, design, implementation and maintenance. Using PHP and MySQL Server programming language as database. The results of research in the form of Online Sales Information System Web-Based Mobile that can facilitate consumers to view products, make reservations for consumers and management for the admin. This information system is equipped with product management features, order data management, customer data management, preparing order reports and payment confirmation. So that this information system can provide convenience both consumer and admin on gamerground.

Optimized Link State Routing (OLSR)is one of the two standard for mesh networks. OLSR is a link state routing protocol, which use hallo message and topology control (TC) to determine the link state information across the mobile ad-hoc network. OLSR is widely used in the wireless mesh network. Raspberry Pi is a mini computer which can be used as a node router to replace the function of a router in a wireless mesh network. In this research, Raspberry Pi is used as a router nodes to determine the performance of routing protocol OLSR. The parameters used to measure its performance is self-configure time, self-healing and bandwidth usage. The test results showed that the use of routing protocols OLSR on the Raspberry Pi in a wireless mesh network proved able to repair itself if there is a problem on the network since it has ability to self-configure and self-healing.

The development of telecommunications technology continues to increase, especially in the use of cellular communication networks. Users of cellular networks today need high-speed communication to be able to enjoy the facilities offered such as streaming video, web browsing, e-mail and others. With the current increase in user capacity, it causes a lot of interference. Therefore, the use of modulation techniques needs to be considered. To find out the proper use of modulation, in accordance with the conditions of the region and the network used, this study examines the performance of variations in modulation levels, namely QPSK, 16QAM, 64QAM and 256QAM. The parameters measured in this study include RSRP, CINR, BER, user connected and throughput. Based on the coverage by RSRP simulation results, it was found that the RSRP did not change because the power signal will always adjust to any use of the modulation level. For coverage by CINR obtained to obtain a higher rate value, a higher CINR value is needed and for coverage by BER parameters, BER does not affect the bit per symbol carried by each modulation, only affects the different types of modulation. Meanwhile, in the capacity by Throughput parameter, QPSK modulation produces the lowest average throughput value of 14.01 Mbps followed by 16QAM 21.58 Mbps 64QAM 28.6 Mbps and 256QAM 33.87 Mbps. In addition, for the capacity by user connected parameters all connected users on all modulation used will produce 100% for capacity by user connected.

Based on the Department of Agriculture which still does not have the tools or media to manage the letter of service, both the incoming and outgoing mail which impact on the weak supervision follow-up of the service letter due to ignorance that the letter should be processed. This study was made as a visual and text notification of incoming and outgoing mail data with more detailed archive storage. This website application is supported by using social media telegram API service that is used as notification in the form of notification to the employee so that the Service Letter can be followed up immediately.

This study examines whether the function f(x)=x2-9x-99 can be used as a key generator in cryptography. The quadratic function is regenerated using the fixed point iteration method into an iteration function. The distribution of digits to the output of iterative function to generate a number of chaos. Randomization testing uses run test and monobit testing. Followed by cryptographic testing to get the correlation between ciphertext and key which will be used as a decision whether the resulting key is random or not. Based on research that has been done iteration function xi = (xi-12-9xi-1-99)/9 can generate CSRPNG Chaos random numbers with the correlation level closest to the value of 0.

The Intrusion Prevention System (IPS) Snort is a server security System that can prevent attacks by examining and recording all data packets as well as recognizing packets with sensors, when the attack has been identified, IPS Snort will deny the access (block) and log of all data packets identified. However by using only IPS Snort which can only check and note the Allert attacks that are incoming in less sense to secure a server by collaborating with the other server's secure system in the sense of being able to make the network security of the server better. Honeypot Artillery chosen which works when there is a Hacker trying to penetrate through open ports can be detected as if hackers can break through the system, then Honeypot Artillery will provide information about who attackers and how the attacker could enter the Snort IPS system for later record in the database that can be viewed on the Web interface, Allert recorded on the experiment that has been done in the database as much as 9453 on TCP protocol as much as 9%, UDP as much as < 1%, and ICMP As much as 91%.

The implementation of 4G LTE network and its advantages gave us faster speed of mobile network. We need to know the performance of LTE mobile network in Sokaraja Tengah – Indonesia, which deployed by Telkomsel network provider by comparing its  RSRP, SINR, RSRQ, and throughput using drive test method of Genex Probe. Signal performance was measured by drive test dedicated mode on the streamed videos and analyzed with Genex Assistant. The result shows that generally Telkomsel’s 4G LTE network in Sokaraja Tengah has 99.7% of (-70) – (-90) dBm RSRP value, 85.09% of 1-15 SINR value, 99.23% of (-15)-0 dBm RSRQ value, average uplink 2575 kbps and downlink 1530 kbps of throughput.

When interacting with others, each person certainly needs a good skill in communication so that the purpose of socializing at school goes smoothly and is achieved. But for student with special needs seems difficult to achieve because they have obstacles or problems in communication. Therefore we need a treatment or assistance called social skills training. The purpose of the study was to determine the effectiveness of the strategy of a game technique called "Bite & Step" to improve social skills in student with special needs so that the effort to interact went smoothly and not be wrong in communicating with friends at school. As participants are groups of student with special needs who have attended elementary school. The research method used is the experimental model in a single case which is the treatment of social skills training using the game technique "Bite & Step" which is then evaluated using graph analysis. The results showed that the technical strategy of "Bite Step" has not been effective for helping to improve the social skills of children with special needs so it needs to be reviewed, evaluated, and retested again

The community's need for electricity is getting higher, so alternative energy sources such as solar heat are needed to replace energy sources from fossil fuels in meeting electricity needs. In this paper we design a two-axis solar tracker with an LDR sensor. A sun tracking system is a unit that is combined into one to control the position of the tracking device with the aim of making the surface of the solar panel module always facing the direction of sunlight. This research discusses the Prototype of the Sun Tracking System in Arduino Based Solar Power Generation Systems to get maximum solar energy. This system will make solar panels move automatically so that sunlight absorption can be maximized. The main control uses Arduino nano which gets input values ??from the LDR sensor then is processed to the output system. With the control system method can automatically be seen the difference in the results of a fixed solar panel with a solar panel with a tracker, from the comparison we get a solar panel with a tracker to get more optimal results.