The library is a place that has a large collection of knowledge books, magazines and other media that are arranged or arranged in a certain way so that it is easy for users to use properly and well. In placing books in the library, books are placed according to the book category given the numbering. However, the placement of books has not been regulated by looking at the level of books that are often borrowed and many visitors find it difficult to find books that are often borrowed. So it is necessary to create a system using a priori data mining method to determine the pattern of book layout arrangement in the library, this system can help to make it easier to determine the layout of the book as needed. Based on the results of the implementation of RapidMiner, the highest combination pattern of library book layout is Pure Science and Social Sciences with 50% support and 86% confidence. General Works and Pure Science were obtained with 41% support and 83% confidence. Furthermore, Public Works and Social Sciences with 41% support and 83% confidence.

AbstrakPenelitian ini bertujuan untuk menentukan dampak pengguna smartphone dikalangan masyarakat. Smartphone juga mempunyai kemampuan disetiap fitur-fiturnya yang mampu membantu atau memenuhi kebutuhan penggunanya. Smartphone sudah menjadi bagian dari gaya hidup setiap orang, mulai dari anak-anak, remaja, maupun dewasa. Banyak orang tidak menyadari bahwa dalam menggunakan smartphone memiliki dampak yang berpengaruh bagi penggunanya baik secara internal maupun eksternal. Dalam menentukan dampak pengguna smartphone dikalangan masyarakat, perlu adanya sistem pendukung, sistem pendukung yang digunakan yaitu metode Fuzzy Tsukamoto, dalam metode Fuzzy Tsukamoto penulis menggunakan 4 variabel yaitu jarak, pengguna, waktu dan dampak untuk menentukan dampak pengguna smartphone. AbstractThis study aims to determine the impact of smartphone users among the community. Smartphones also have the ability in each of its features that can help or meet the needs of its users. Smartphones have become a part of everyone's lifestyle, ranging from children, adolescents, and adults. Many people do not realize that using a smartphone has an impact on users both internally and externally. In determining the impact of smartphone users among the public, there needs to be a support system, a support system used is the Fuzzy Tsukamoto method, in the Fuzzy Tsukamoto method the writer uses 4 variables namely distance, user, time and impact to determine the impact of smartphone users.

<p>This study was conducted to determine the effect of  work discipline on employee productivity at PT. Perkebunan Nusantara IV (Persero) Pabatu Business Unit. The population in this study were all employees of the department, engineering / processing,  and  general  at  PT. Perkebunan Nusantara IV (Persero) Unit Business Unit is 1031 people. the number of respondents used in this study were 104 people. The research was obtained from the results of the t test on the variables obeying all company regulations, namely 2.652&gt; T table = 1.980 stating that complying with all company regulations had a positive and significant effect on employee work productivity. Effective use of time is 3,069 &lt;Ttable = 1,980 stating that  effective use of time has a positive and significant effect on employee work productivity variables. Responsibility for work and assignments is 5,467&gt; T table = 1.980 states that work responsibilities and tasks have positive and significant to employee work productivity. The absentee level of 1,200 &lt;Ttable = 1,980 has a positive and insignificant effect  on employee work productivity. The simultaneous test results obtained are 262.880&gt; 2.31, which states that work discipline simultaneously has a positive and significant effect on employee work productivity. And the R value obtained is 0.884. This figure shows that 88.4% of work productivity is explained by the variable work discipline.</p>