This study aims to analyze the distribution of research related to the use of the Watson criteria in analyzing student errors at all levels of education. The method used is Systematic Literature Review (SLR). The sample consists of 42 results of qualitative research on the use of Watson's criteria in analyzing student errors. Samples were taken from indexed journals published in the 2017-2021 period. The key question of this research is how the description of the distribution of research related to the use of the Watson criteria in analyzing student errors, is reviewed based on the year of publication, level of research, methods used, number of subjects, types of questions, demographics, and types of errors made by students. Through the SLR method, it was found that there was an increase and decrease in the number of studies over the last five years. Based on the criteria for junior high school level studies, the use of descriptive qualitative methods, using story questions, with less than 30 subjects, and the demographics of research on the island of Java are the most dominant. The most dominant student errors are procedural errors and missing conclusions. This becomes very important to be considered in learning mathematics.

The thermally mediated low-spin and high spin states observed in LaCoO3 appears to be retained with Al substitutions, revealing a strong interplay between bonding and disorder in the system.

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Data scientist is a profession that is claimed to be excellent in the 21st century by many experts from big companies in the world. The area of competence that really needs to be mastered by job seekers other than office computers is Data Scientist skills. For the younger generation, talking about Data Scientist is related to programming or coding. Things that have never been done at PKBM Al Habib. With the service program from the STMIK Pelita Nusantara in collaboration with PKBM Al Habib, Introduction of Data Scientist was carried out for PKBM Al Habib Participants through Basic Python Coding Learning. The purpose of the activity is to introduce Data Scientists to members of the Al Habib PKBM training or course so as to produce Data Scientists through learning basic python coding. The achievement of this training is that participants are able to recognize and master the basics of Python programming.

Increased energy demand in Indonesia is accompanied by increasing demand for natural gas, where in the next 50 years natural gas is predicted to be the number one energy source in Indonesia, pipeline is the cheapest way to distribute natural gas, in this way, length of pipeline infrastructure will increase year by year. it is still very much needed by both the household, industry, and power plants. The longer the pipeline, the risk of pipeline failure also increases, it is necessary to understand what factors have the most influence on pipeline failure, the method used is to create a factor matrix from a modified Muhlbauer, MICMAC is used to test the strength of the relationship between significant factors causing the potential hazard of pipeline failure. based on their influences and dependencies. The value of the dependency relationship between factors is determined from discussions with several pipeline experts in Indonesia, who work in related fields, the result is that there are three main factors that contribute major potential hazards, without being influenced by other factors, that is determining safety factors in the design process, depth pipeline and the existence of SOP in the pipeline system. One factor, namely depth, can be eliminated because there are government regulations requiring natural gas pipelines to be buried in the ground at a certain depth.

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This study aims to determine and understand the liniage status of children resulting from fertilisasi in vitro process (test-tube baby) from surrogate mothers according to Islamic law and positive law. This research is included in the type of library research, which is a research carried out by collecting data from books and literatures from previous studies, using a normative juridical approach, and comparison. The research results found are as follows; First, the determination of the origin of the child in Islamic law is very important, because with that determination it can be seen the nasab relationship between the child and his parents. Second, the position of fertilisasi in vitro  from the mother who replaces her lineage is cut off from her father because it is included in the act of adultery and only has the lineage of the one who gave birth to her. Third, the view of Islamic law on fertilisasi in vitro   from a surrogate mother is unlawful, because its status is the same as adultery, resulting in mixed lineage and causing complicated problems. Meanwhile, according to positive law, fertilisasi in vitro  from surrogate mothers is prohibited because it is not in accordance with article 127 of 2009 concerning health.