Developing of prototype now are became easier with the existence  of 3 d printer, now is common known as rapid prototyping method. There are many different method on 3d printing depend on material used for printing. The wide range of material that can be print using 3d printer such as metal to plastic even ceramic. The rapid prototyping using 3d printer have various advantage compare to traditional prototyping. The development of 3d printing makes it not only for prototyping but can be a small batch manufacture, where economic scale of production cannot be reach with traditional production. The fast development of computer and internet technology have big impact on the 3d printer development, before the development of reprap 3d printing was only knew by industrialist and manufacturer. After reprap born, 3d printer is became more common to personal user. People can have their 3d printer at home. People can design their own product using CAD software and send it to 3d printer, or send it via internet to print by 3d printing company. Even there ara lot of advantages of 3D printer development , there is some disadvantages of 3d printer, especially on regulation.        
 

Increasing competition in business competition, especially in companies engaged in the trading sector, requires every business actor to be quick and responsive in handling or responding to the condition of his sales, this is intended so that the company's sales results continue to increase And one of the main keys in sales is the inventory of goods, inventory goods or inventory are goods that can usually be found in closed warehouses, fields, open warehouses, or other storage places, either in the form of raw materials for semi-finished goods, goods for operational purposes, or goods for the needs of a project. By managing goods properly, it will certainly make it easier to find and get information for available goods. And to manage this information, a computer-based inventory information system is needed, which is expected to increase sales volume. The information system created will assist companies in finding or processing data on available goods, processing the entry and exit of goods, as well as knowing information on suppliers

The devastating earthquake that struck Palu on the island of Sulawesi last September ripped through the Earth's crust at a rare high speed, scientists have found. When the disaster is over, many natural disaster victims need immediate help. The call center provided is usually busy with services and complaints from victims of natural disasters. The greater the impact of natural disasters, the more information services that must be carried out. By using CEPAT chatbot for disaster evacuation in Palu, information about evacuation place can be given to victim by access it. Then when the victim shares their location, CEPAT will give the nearest evacuation place information using LBS improvement Chabot.

In general, the college admission process is done through registration, file selection, examinations, an announcement of the results of students who pass, and ends with re-registration. In this case, a problem was found where there is a significant decrease in the number of student who register with those who re-register .Things like this can reduce the balance between new students and students who meet the requirements, to make a decrease in the quality of higher education and affect accreditation. Based on these problems, a classification method was developed to look for patterns of students who would enter institutions and what factors influence students to re-register.To improve the accuracy of the decision tree algorithm the author use adaptive boosting (adaboost) in finding factors that make prospective students continue to the re-registration process.From the results of the study, the AdaBoost-based decision tree algorithm shows that the level of accuracy has an increase of 20%. The presentation of results is as follows, 61.4% (decision tree); 91.35% (decision tree + AdaBoost)

This study aims to design an ordering and sales information system at CV New Flashphone Semarang. Through the creation of the Ordering and Sales Information System, it is expected to be able to simplify the process of ordering and selling goods, as well as to make reports of goods more quickly, which is used by the company as a management tool in sales activities at CV New Flashphone Semarang.
                The research method used is the Real Time Processing research method, which is one of the processing with concrete processes that uses online media. This input is done continuously and can automatically be obtained through the sensor. In using this real time processing, the user gets much more benefit because the time it takes to get the results is instant. So you don't have to wait long to get the desired result. The reaction is much faster than some of the previous processing.
                The results of the research from the design of ordering and sales information systems are to make it easier for consumers to make purchases and order goods, as well as to facilitate companies in marketing their products and also make it easier for companies to control existing goods. Currently the company is still using a manual system in recording ordering transactions and selling goods, even though implementing an information system will minimize the risk of recording errors in reports, so that information is faster and more complete.

This study generally aims to design an information system that can handleproblems in putting and sorting goods into warehouses at CV. Sekar Intan KIC Gatsu,Semarang. In terms of using the Information System, CV. Sekar Inran KIC Gatsu,Semarang. In the transfer and sort of goods in the warehouse still using a manualsystem when the implementation, warehouse employees must take and place the goodsto the warehouse that has been determined each - each type of item, so employees mustcalculate the number of items when the goods take place, here various problems occur,because it requires some HR to manage the warehouse performance process at CV.Sekar Intan.To support the research, researchers used Research and Development (R & D)research methods through the microcontroller-based moving robot design simulationdesign stages that have been tested by experts declared valid with Valid validity levelsand final product development design simulation prototypes carried out. goods transferrobot uses Arduino IDE development software that is integrated with Arduino Mega2560, 6 pin line sensor, dc motor, motor driver, servo motor, motor driver, lcd, and hasbeen tested in the field by General Adv. Administration and HRD as users / users andstated to be very effective.Based on the results of the research and discussion, it can be concluded that therobot design system developed can overcome the problems in the old system on the CV.Sekar Inran KIC Gatsu, Semarang, so as to produce a system that can facilitate workprocesses and parking processes for employees to be more effective and efficient.Keywords: Arduino IDE integrated with Arduino Mega 2560, 6 pin line sensor, dcmotor, motor driver, servo motor, motor driver, lcd.

Konveksi Muzammil adalah sebuah perusahaan yang bergerak di bidang produsen celana jeans, yang berlokasi di desa Cepoko Mulyo Kendal Jawa Tengah yang didirikan sejak tahun 1998. Perhitungan biaya produksi dan harga jual Konveksi Muzammil Cepoko Mulyo masih menggunakan perhitungan secara konvensional. Padahal era sekarang diperlukan manajemen strategi yang lebih baik demi bersaing secara kompetitif di dunia industri. Oleh karena itu diperlukan sebuah sistem informasi yang sesuai guna mendukung aktifitas bisnis Konveksi Muzammil dalam melakukan pengelompokan biaya, data dan pembuatan sistem laporan. Salah satu cara yang bisa dilakukan adalah memanfaatkan sistem informasi berbasis teknologi informasi untuk memudahkan proses penghitungan biaya produksi dan meningkatkan ketepatan dalam memanajemen keuangan secara keseluruhan. Penelitian ini merancang sebuah Sistem Informasi Akuntansi Perhitungan Harga Pokok Produksi Menggunakan Metode Variable Costing, dengan menggunakan Visual Basic 6.0 sebagai bahasa program dan MySQL sebagai database. Hasil dari aplikasi ini yaitu pencatatan seluruh data yang berkaitan dengan proses perhitungan Harga pokok Produksi secara terkomputerisasi. Hasil dari aplikasi ini dapat mempermudah proses penghitungan harga pokok produksi, mempermudah dalam pengelompokan data produksi dan  dengan adanya metode variable costing pada sistem ini menjadikan penghitungan harga pokok produksi menjadi lebih sesuai dengan biaya yang dikeluarkan.

Virtual teachers are devices or agents with the function of replacing the role of humans (teachers) with their teaching skills. The virtual teacher also has a function as task facilitator and is presented during training, especially when the teacher is actually not present. The virtual teacher's objectivity is carried out by explaining the subject matter in a virtual environment, for example, virtual independent learning. In the western world, virtual schools are quite widely applied, especially to students who are homeschooling. In a virtual school, all materials, assignments and grades are accessed via the internet. The virtual teacher concept refers to a device that provides guidance and practice. Teachers who are equipped with interactive agent functions that can provide direction and feedback in order to improve student abilities. By utilizing natural language processing (NLP) and pattern matching to help students learn alone without being accompanied by a teacher. NLP is used as a learning tool as outlined in the text of the sentence as part of the learning material which is done virtually. Meanwhile, pattern matching is used to group the questions asked so that the computer can gain an understanding of the questions posed by students. This grouping aims to solve problems with different word order which basically have different meanings. The teacher has the facility to make material, make questions, and answer student questions. A teacher can add knowledge about the database to enrich the source of knowledge for students.

Basically, the principles of Al-Qur'an learning can be carried out using various methods, all of which have the same goal, namely so that children can read the Al-Qur'an properly and correctly. The low motivation of students in learning the Qur'an is still one of the reasons for the low quality of education, especially in the ability to read the Qur'an. One of the efforts to increase motivation to learn to Read and Write the Qur'an is the use of online methods during the Covid-pandemic. 19 can be carried out by educators or teachers in the reading and writing subject of the Koran which is the basis of learning in Islam
The low motivation of students in learning Al-Qur'an is still one of the reasons for the low quality of education, especially in the ability to read Al-Qur'an. So it can be said that motivation and learning achievement are directly proportional to the learning methods developed. One of the efforts to increase the motivation to learn to read and write al-quran is to use appropriate methods that can be used by educators or teachers in reading and writing al-Qur'an subjects which are the basis of learning in Islam.

Pondok Pesantren is a non-formal institution that is engaged in religious education. Pesantren is one of the places of education and preaching that is required to be able to provide information about Islam to the wider community. Easy access to information and communication, can be used to introduce pesantren to the public. Promotion using video profiles, brochures and banners has not been able to provide as much information as possible to the public, causing the pesantren to be less well known to the public.
This research, in general, aims to promote and provide the widest possible information about Pondok Pesantren Addainuriyah 2 and its activities to the public through the website. In particular, it makes it easy for the public to access information and communicate intensively with administrators of the Addainuriyah 2 Semarang Islamic boarding school. The research method in this study is based on the suitability and type of research, using the Research and Development (R&D) method. R&D in education is often called research-based development.
As a result of this research, the implementation of the website as a media of promotion and information in the Addainuriyah 2 Semarang Islamic boarding school, can provide a lot of information to the public, and as a means of communication between the general public and administrators of Pondok Pesantren Addainuriyah 2 Semarang.