Effective Medium Theory of Metamaterials and Metasurfaces

Metamaterials, including their two-dimensional counterparts, are composed of subwavelength-scale artificial particles. These materials have novel electromagnetic properties, and can be artificially tailored for various applications. Based on metamaterials and metasurfaces, many abnormal physical phenomena have been realized, such as negative refraction, invisible cloaking, abnormal reflection and focusing, and many new functions and devices have been developed. The effective medium theory lays the foundation for design and application of metamaterials and metasurfaces, connecting metamaterials with real world applications. In this Element, the authors combine these essential ingredients, and aim to make this Element an access point to this field. To this end, they review classical theories for dielectric functions, effective medium theory, and effective parameter extraction of metamaterials, also introducing front edge technologies like metasurfaces with theories, methods, and potential applications. Energy densities are also included.

Abel Gance po trzykroć oskarża: metafizyka i apokaliptyczna wyobraźnia w służbie pacyfizmu

This text is inspired by monumental and editorially perfect BluRay/DVD box set J’accuse (Gaumont, Paris 2017). It includes BluRay and DVD editions of all three J’accuse films (1919, 1937, 1956), two other Gance’s films, specifying the context of „trilogy” (Les Gaz mortels, 1916 and La Fin du monde, 1931) and the large director’s monography by Laurent Véray. From this revelatory archive emerges the image of Abel Gance as an artist who for 40 years of his filmmaker’s career was incessantly reworking deep trauma caused by World War One. It resulted in three J’accuse films, two other finished films and some other never realized screenplays and projects which made up particular work-in-progress whose mission is a message of peace. The text analyzes all three versions of J’accuse, concentrating on their allegorical style, metaphysical concept of ressurrection of fallen soldiers and apocalyptic vision of resurrected dead men’s processions which by its horror should persuade the mankind to stop all wars. In the last J’accuse (1956) – in fact, strongly shortened and reedited film from 1937 – Gance used the technique of triptych in which the picture was projected by three parallelly set projectors on the large screen with proportions 4:1. This version, immersing perceptually and sensorically spectator in the wide-format picture full of war horrors, today seems to be much more effective medium for message of peace than undecided between pacifism and patriotism, impressionistic in its style film from 1919, or laden with full of pathos verbal rhetorics J’accuse 1937.

Theorization the Use of Podcasts as an Alternative Medium of Da’wah and Its Impact on the Audience: The Case of Indonesia

The purpose of this research is to provide novelty in the study of communication science, especially on the role of new media, namely podcasts as a medium of da’wah, which so far has not been widely studied. Through a phenomenological approach and conducted interviews with two uploaders da’wah content of Baha’uddin Nursalim, and two active listeners, the results obtained that podcast as an alternative medium of da’wah is a message about society’s civilization towards the need for auditory media to obtain religious content is increasing. Moreover, users and listeners are considered quite active in choosing an effective medium of da’wah because podcasts provide several advantages during high community mobility and an adaptive and dominative effort to strengthen the existence of Nahdlatul Ulama organizations in the digital era.

Analisis Pesan Dakwah Di Acara Mutiara Ramadhan Di TVKU Semarang

Television as a very effective medium in spreading da'wah and the most influential in shaping attitudes and personality broadly, many programs on TVKU Semarang made the author choose the Mutiara Ramadhan program, one of these events is a special program that inspires and educates many people, the event was five speakers competent in their field. In this study, the researcher used content analysis theory, which was used to analyze the video content of Mutiara Ramadhan and took the da'wah messages from the text and compared it using the Qur'an, Hadith, and the opinions of the figures. The results of this study are as follows: (1) The message of da'wah in the Mutiara Ramadhan program on TVKU Semarang includes: in the Maesaroh episode there is a message of death, practicing patience. Then in the Iswatun Khasanah episode there is a message, try, be grateful. Siti Maemunah which contains the message of Islam rahmatan lil alamin, Tolerance, Bhineka Tunggal Ika. Umi Nu'ammah there is a message of sidiq, trust, help, Istiqomah. Muta'allimah contained messages about health, magfirah and the night of lailatul qadar, and (2) The da'wah method used in the Mutiara Ramadhan program on TVKU Semarang, researchers found the methods used were the Bil-lisan, Muidzah-Hasanah and Bil wisdom methods.