Covid-19 outbreak, which is considered to be still not optimal enough, the Indonesian government seems to be risking its efforts on a mandatory vaccination policy. However, this intervention will not succeed without the participation of the community in the form of their interest in receiving the Covid-19 vaccination. Therefore, by involving 422 Muslim respondents who live in the Special Region of Yogyakarta, the main objective of this study is to focus on the factors that influence or predict halal Covid-19 vaccination intention. Thus, it is clear that this research is a quantitative descriptive study with a cross-sectional survey. The results of the descriptive analysis of this study then explained that the majority of respondents were Muslim people who were male as much as 217 (51.42%), aged 19 - 24 years (38.39%), domiciled in the city of Yogyakarta (38.63%) and worked as students as many as 188 people (44.55%). While the results of quantitative analysis using the Partial-least square structural equation modeling (PLS-SEM) method in this study revealed that halal Covid-19 vaccination intention was influenced by factors such as attitude toward halal vaccination (β = 0.541, t-value = 10.199, -value = 0.000), subjective norm (β = 0.196, t-value = 3.913, -value = 0.000), and social norm (β = 0.156, t-value = 3.374, -value = 0.001) positively and significant. In addition, the theoretical and practical implications based on the results of the research are also discussed in this study.

This study focuses more on identifying the role of the Theory of Planned Behavior (TPB) in predicting public intentions to get the Covid-19 vaccine in Special Region of Yogyakarta. Three hypotheses were then put forward in the form of attitude (H1), subjective norms (H2) and perceived behavioral control have a positive and significant effect on Covid-19 vaccination intention (H3). By using a quantitative method through a cross-sectional survey approach involving 426 respondents, the results of this study ultimately concluded that Covid-19 vaccination intention was determined by attitudes towards the Covid-19 vaccine (β = 0.447, T-Value = 8,079, p-value = 0.000), subjective norm (β = 0.176, T-Value = 3.271, p-value = 0.001) and perceived behavioral control (β = 0.263, T-Value = 6.348, p-value 0.000). And among the three, attitudes were found to be the strongest and most significant predictor of Covid-19 vaccination intention. Several limitations and suggestions were also proposed in this research.

Since its inception, the 2019 coronavirus disease (Covid-19) outbreak has become a major health problem. At the same time, countries worldwide have been waiting for a Covid-19 vaccine to be sufficiently available. When the Covid-19 vaccine became available, several countries began to adopt mandatory Covid-19 vaccination policies. However, mandatory Covid-19 vaccination has received strong opposition from the start. Rejections have emerged from various parties, including from libertarians. The researcher observes that the current research attempting to analyze the mandatory Covid-19 vaccination still revolves around the perspective of human rights and utilitarianism. Then, this study aims to explore and find out how the libertarian perspective toward mandatory vaccination. Normative research methods with conceptual and comparative approaches were used in this study. After analyzing secondary data sources with prescriptive analysis methods, this study finally succeeded in finding that mandatory Covid-19 vaccination has its place, legitimacy, and justification on the ideological side of libertarianism. It is because libertarians accept that the government may require a mandatory vaccination program against Covid-19. In addition, due to the libertarian framework, the government is still justified in enforcing coercive policies that violate the rights of certain individuals if the policy is necessary to avoid greater harm to others.

In today's world, it is no longer a surprise that (smart) mobile devices have become the most helpful technological devices to be used for various purposes, one of which is in English education. Therefore, studies on improving language learning, especially vocabulary for learners using mobile device technology, have become commonplace in today's digital era. However, to achieve maximum use, there needs to be an intention from students to accept the English vocabulary technology in the learning process. Therefore, the purpose of this study was to evaluate the integration capability of the Technology Acceptance Model (TAM) to predict and explain EFL college students' intention to utilize mobile English vocabulary learning. This research involves TAM because TAM has been widely applied to study information technology because of its effectiveness in assessing the level of user acceptance. Through a quantitative method using a cross-sectional survey approach involving 456 respondents, this study ultimately found that, after being analyzed using the PLS-SEM analysis technique, the constructs in TAM, including perceived ease of use (β = 0.302, T-Value = 6.587, and P-value = 0.000) and usefulness (β = 0.359, T-Value = 7.501, dan P-value = 0.000), had a positive and significant effect on EFL college students' intention to utilize mobile English vocabulary. Perceived usefulness shows the most dominant effect. However, this study has limitations that need to be considered. And, of course, caution in generalizing is necessary.