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The development of the industrial world and human life is increasingly modern and less attention to environmental sustainability causes the virus causes the epidemic has a high tendency to mutate so that the virus that initially only attack animals, is also found to have the ability to attack humans. The epidemics that lasted some time were bird flu epidemics and swine flu epidemics. The flu epidemic led to several deaths and many people admitted to the hospital. Strain (derivatives) of H5N1 virus was identified as the cause of the bird flu epidemic while the H1N1 strain of the virus was identified as the cause of the swine flu epidemic. The symptoms are similar to seasonal flu caused by H3N2 strain of the virus. Outbreaks of bird flu and swine flu initially only attacked animals, but over time some people were found to be infected with the virus.

This study aims to reveal the use of software that works with Natural Language Processing (NLP) technology by students, teachers, and lecturers in Indonesia. A total of 166 respondents from 51 institutions in 12 provinces in Indonesia have participated in data collection through questionnaires and interviews. Questionnaire data were presented in percentage form, while interview data were analyzed using the purposive sampling technique. The analysis results show that most students are unfamiliar with NLP but have used the technology in various applications. Based on the data analysis, students and lecturers have commonly used Google translate and Grammarly. However, PoP and elicit applications useful for searching metadata for scientific papers are not widely known. VOS-Viewer and Nvivo as qualitative data processing applications have not been widely used. Thus, it is crucial to conduct training on using the applications mentioned.

This study aims to develop the Gramabot application as a means of online learning during the pandemic and to examine its effectiveness as a medium for German grammar learning. The design-based research uses learning experience design methodology. Beside an introduction of the state of the art of chatbots for language learning, the paper describes the concept of the chatbot application and its evaluation. Prior experiences with chatbots, implementation experiences and evaluations insights were obtained from 36 Indonesian students with beginner level German language skills. The data were described using qualitative and simple descriptive statistical analysis. The results of the analysis show that most of the respondents are familiar with several chatbot applications, the use of chatbots is not as a learning medium, but as a means of asking questions about products. In addition, String Matching is a suitable method used to develop Gramabot. Based on the results of the evaluation, it can be concluded that Gramabot can help students understand basic level grammatical material.

Epidemics have a major impact on human life both in the health and economic fields. One such epidemic is avian influenza. This epidemic causes the infected human to get hospitalization. Some action is needed to prevent the extension of this outbreak. Measures undertaken include vaccination in poultry, burning of infected poultry, and quarantine and treatment of infected humans. In this paper, we developed the mathematical model of AI with burning infected poultry and noticing the success ratio of poultry vaccination in a constant population.

In this paper the Poincar’e-Lindstedt perturbation method will be applied to analyse an oscillator with Rayleigh type with Periodic Damping Coefficient. The mathematical model of the oscillator describes flow-induced vibrations in a uniform wind field. The horizontal cylinder supported by springs as a model can be designed vibrate in vertical direction. It will be studied a solution approximation of the oscillator by using Poincar’e-Lindstedt perturbation method. The basic idea of the Poincar’e-Lindstedt perturbation is that from the simple harmonic oscillator, the period of oscillation depends on the amplitude of the motion. The Lindstedt perturbation expansion allows the frequency to adapt to the nonlinearity by defining the “stretched time variable” The periodic solution of Limit cycle will be studied in this paper.

Diagnostic assessment serves as a tool employed to assess students’ mastery levels, measuring both their progress and the effectiveness of the educational program. This study aims to delineate the preliminary diagnostic assessment conducted across five educational institutions. 139 students from five different educational institutions participated in data collection, who were tested using five distinct genres: procedure text, fantasy fairy tale text, description text, folk poetry text, and explanation text. Each class accommodates students exhibiting diverse levels of proficiency: high, moderate, and low. Data were gathered through standardized testing and subjected to quantitative descriptive analysis. The data show that the cognitive diagnostic evaluation within each classroom conforms to a normal distribution. Data analyses indicate that a profound understanding of students’ initial potential forms the cornerstone for tailoring pertinent pedagogical materials and strategies, thereby facilitating the creation of differentiated instructional settings. Through the implementation of diagnostic assessments, educators will be adept at identifying potential scholastic challenges among students at an early stage and consequently institute proactive measures to address them effectively.

Zika disease began to get the world spotlight when in 2016 around 1-1.5 million people were infected with the Zika virus in Brazil and 4000 babies were born Microcephaly. Indonesia is a region that is potentially attacked by Zika virus outbreaks. This study discusses the mathematical model for the spread of Zika disease in humans is associated with the population of spreading vectors which in this case are mosquitoes. The model used is a deterministic model in the form of a compartment model in sub-population classes. The purpose of this research is to build a mathematical model, analyze the stability point, and arrange a simulation of a mathematical model.

Critical and creative thinking give important role in learning matematics for mathematics education students. This research to explored the characteristic of critical and creative thinking of students of mathematics study program in mathematics department. Critical thinking and creative thinking can be illustrated as two sides of a coin, which one is associated to the other. In elementary linear algebra courses, however, critical thinking can be seen as a foundation to build students' creative thinking.

Avian influenza is a terrible respiratory infectious disease caused by the avian influenza virus. The great concern of the world’s health experts is the possibility of spreading avian influenza and becoming an uncontrollable pandemic. The study’s purpose was to derive, analyze, and interpret the mathematical model’s simulation of the avian influenza epidemic with treatment on humans. This paper constructed a mathematical model formed by SI-SIRT (Susceptible poultry, Infectious poultry, Susceptible human, Infected human, Treated human, Recovered human). We obtained a reproduction number (R 0 ) from Analyzing the model. R 0 is a formula to determine whether the disease will disappear or spread over in the future. The free disease equilibrium point was local asymptotically stable if R 0 < 1, and the endemic equilibrium point was local asymptotically stable if R 0 > 1.

In this paper will be studied an Oscillator with Mass that changes periodically and forced vibration of a simple degree of freedom. This system related to the dynamics of cables such as stayed bridges, electricity, telephone, and others. Under normal conditions for all type of cables one would not expect galloping type of vibrations due to wind-forces. There is an exception concerns vibrations excited by a wind-field containing raindrops. As has been observed on scale models in wind-tunnels the raindrops that hit the inclined stay cable generate one or more rivulets on the surface of the cable. It will be studied in this paper an oscillator single degree of freedom with mass that changes periodically and forced vibrations. Small masses which periodically hitting and leaving to the oscillator with different velocity give a forced to the vibration. Because the small mass stay on the oscillator surface for some time then the effective mass of the oscillator will periodically vary in time. In this paper it will be studied the possibilities of the mass and the velocity of the masses which are hitting and leaving to the oscillator by using a perturbation method.