Log in/Sign up
Arts & Humanities
Biology & Life Sciences
Business & Economics
Chemistry & Materials Science
Computer Science & Mathematics
Environmental & Earth Sciences
Medicine & Pharmacology
Public Health & Healthcare
Metaverse as a Learning Environment
The metaverse is unavoidable in an increasingly digitalized society and will potentially have a profound influence on what is understood as teaching and learning in its formal and informal dimensions, both in initial and continuing education.
06 Feb 2023
Calendar of 13 Months
Has anyone of us missed an event because he was confused between days and dates? Do we really remember the date of any day if we do not have a calendar? Is the current Gregorian Calendar efficient enough for use, and does it really facilitate our life or make it more complicated? Have you ever thought about a much simpler way to calculate days and dates in a year? All these questions are answered in this article, in which the author proposes an original calendar that might facilitate our lives if we can apply it.
12 Jan 2023
Digitainability and Smart Education
Smart education, with its multidimensional interdisciplinarity, allows the promotion of a learning process that is simultaneously efficient and effective, enhancing digitainability and, consequently, more proactive attitudes in shaping a Sustainable Digital Society.
03 Dec 2022
Six Stages to Choose Sampling Techniques
In order to answer the research questions, it is doubtful that researcher should be able to collect data from all cases. Thus, there is a need to select a sample. The entire set of cases from which researcher sample is drawn in called the population. Since, researchers neither have time nor the resources to analysis the entire population so they apply sampling technique to reduce the number of cases. There are six stages to choose sampling techniques.
17 Jul 2023
Imamate (Twelver Doctrine)
Imāmah (Arabic: اٍمامة) means "leadership" and is a concept in Twelver theology. The Twelve Imams are the spiritual and political successors to Muhammad, the Prophet of Islam, in the Twelver branch of Shia Islam. According to Twelver theology, the successors to Muhammad are infallible human beings, who rule justly over the community and maintain and interpret sharia and undertake the esoteric interpretation of the Quran. The words and deeds of Muhammad and the Imams guide the community. For this, the Imams must be free from error and sin and chosen by divine decree—nass—through the Prophet. Shi'a believe that divine wisdom—'Aql—is the source of the souls of the Prophets and Imams and gives them esoteric knowledge—hikmah—and that their suffering is a means by which their devotees may acquire divine grace. The Imam is not the recipient of divine revelation, but has a close relationship with God, who guides him, allowing the Imam in turn to guide others. The Imamat, or belief in the divine guide, is a fundamental belief in Shia Islam and is based on the concept that God would not leave humanity without access to divine guidance. According to the Twelvers, an Imam of the Age is always the divinely appointed authority on all matters of faith and law. Ali was the first Imam in this line and in the view of Twelvers the rightful successor to Muhammad, followed by the male descendants of Muhammad through his daughter Fatimah. Each Imam was the son of the previous Imam, with the exception of Husayn ibn Ali, who was the brother of Hasan ibn Ali. The twelfth and final Imam is Muhammad al-Mahdi, who is believed by the Twelvers to be alive and in hiding.
17 Oct 2022
Society 5.0. has for finality to strengthen the potential of cyber-physical-social relations in promoting the improvement of the quality of life of all people through a super smart society.
30 Oct 2020
Path Planning and Optimization Techniques
The optimization algorithms for pathfinding for ground robotics [20,21,22,23,24], aerial vehicles [25,26,27], and underwater vehicles [28,29] includes a wide range of applications. The most well-known applications for autonomous vehicles are obstacle avoidance, path planning, localization, navigation, sensing, and communication, which works on pre-essential maps related to the environment; they also play a vital role in communication relay, aviation industry for surveillance, and loitering dominated missions.
09 Oct 2021
Ammonia is the second-largest global chemical products, utilized as agricultural fertilizer, food production, industrial materials, refrigerants, and additives. Recently, the utilization of ammonia as the energy carrier (secondary energy source) has attracted many interests, due to its high volumetric hydrogen density, low storage pressure, high stability for long-term storage, high auto-ignition temperature, low condensation pressure, and lower gas density than air. in general, ammonia production includes the currently adopted thermochemical (Haber–Bosch), electrochemical, and photochemical cycle processes.
20 May 2022
MDPI is a pioneer in scholarly open access publishing, supporting academic communities since 1996. Based in Basel, Switzerland, MDPI’s mission is to foster open scientific exchange in all forms, across all disciplines. Its 283 diverse, peer-reviewed, open access journals are supported by more than 35,500 academic editors. MDPI serves scholars from around the world to ensure that the latest research is freely available, and all content is distributed under a Creative Commons Attribution License (CC BY).
17 Jan 2022
Arginine Signaling and Cancer Metabolism
Arginine is an amino acid critically involved in multiple cellular processes including the syntheses of nitric oxide and polyamine, and is a direct activator of mTOR, a nutrient sensing kinase strongly implicated in carcinogenesis. In this review, we will discuss arginine as a signaling metabolite, arginine’s role in cancer metabolism, arginine as an epigenetic regulator, arginine as an immunomodulator, and arginine as a therapeutic target. The different cell killing mechanisms associated with various cancer types will also be described.
23 Feb 2023
Featured Entry Collections
Encyclopedia of Social Sciences
Encyclopedia of COVID-19
Encyclopedia of Fungi
Luis V. Lopez-Llorca
Encyclopedia of Digital Society, Industry 5.0 and Smart City
Log in/Sign up
Terms and Conditions
Browse our user manual, common Q&A, author guidelines, etc.
Rate your experience
Let us know your experience and what we could improve.
Report an error
Is something wrong? Please let us know!
Other feedback you would like to report.
Did you find what you were looking for?
Do you agree to share your valuable feedback publicly on
Yes, I agree. Encyclopedia can post it.
No, I do not agree. I would not like to post my testimonial.
Upload a screenshot
(Max file size 2MB)