This study aims to analyze the logo of the State Islamic University of North Sumatra (UINSU) using Charles Sanders Peirce's semiotic approach. Peirce's theory divides signs into icons, indexes, and symbols, and views meaning through a triadic process: representamen, object, and interpretant. With a qualitative approach, this study identifies visual elements in the UINSU logo and interprets their meaning based on the context of Islam, science, and nationalism. The results of the analysis show that each visual component, whether shape, color, or typography, contains deep philosophical and ideological meanings and represents the identity and institutional vision of UINSU.

In the era of the industrial revolution 4.0, a skill is needed that can lead someone to success in their life. These skills are 4C skills, namely Critical Thinking, Communication, Creative Thinking, and Collaboration skills. These 4C skills are needed in the 21st century. 4C skills can be trained through learning in educational institutions. (1) Critical Thinking and Creative Thinking, can be trained with an approach that begins with problems such as with problem-based learning strategies, project-based learning, cooperative group investigation, inquiry learning which in the implementation of these strategies, is continued with challenges in the form of different ways of solving problems by looking at the problem from various perspectives. (2) Collaboration or working together can be trained through cooperative learning strategies and other learning strategies that are implemented in groups by bringing up cooperative learning values. (3) Communication can be trained through: compiling activity results reports, project assignment presentations, group/class discussions, online learning, and other activities that create interaction between students with other students, lecturers, and with other school/campus communities.

A gate is a structure in the form of an entrance or gate to an area or area. This structure is often found in temples and other Hindu religious shrines, because the gate is an important element in Hindu architecture. Gapura is also often interpreted as a gate. Pendopo is a building without walls with many pillars or pillars, this building is used as a place for meetings, pilgrimages, community meetings, and so on. Along with the progress of Kandawati village, especially the progress of Religious Tourism, it is necessary to build a gate as an icon of Kandawati Village. This gate building serves as an icon to attract tourists who will visit Kandawati Village. Therefore, the purpose of this service is to plan the design of the gate and pavilion of the Gandawati tomb in accordance with the cultural characteristics of Kandawati Village. The method of implementing the service includes site surveys, making working drawings of gates and pavilions, making budget plans, exposing the results of drawing designs and costs to the village. The result of this service is the compilation of technical drawings and budget plans that can be used by the village as the basis for the gate and pavilion construction plan. In this way, the village will be equipped with plans and cost plans when construction work is carried out.

Rivest Cipher 4 (RC4) has the main factors that make this algorithm widely used, namely its speed and simplicity, so it is known to be easy for efficient implementation. The nature of the key in the RC4 algorithm is symmetrical and performs a plain per digit or byte per byte encryption process with binary operations (usually XOR) with a semirandom number. To improve the visual image after the encryption process, in this article we use the Least Significant Bit (LSB). In this study, the quality of the stego image and the original image has been calculated using MSE, PSNR and Entropy. Experiments were carried out by images with a size of 128x128 pixels to 2048x2048 pixels. Experiments using imperceptibility prove that the stego image quality is very good. This is evidenced by the image quality which has an average PSNR value above 53 dB, while the lowest PSNR value is 48 dB with a minimum dimension of 128x128 pixels.