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"This book offers an accessible introduction and practical guide to Voice over Internet Protocol (VoIP) technology, providing readers with the know-how to solve the problems encountered in applying VoIP technology across all types of network. It incorporates the latest research findings and brings readers up to date with the challenges that are faced by researchers developing novel applications of VoIP.The authors discuss the general architecture of VoIP technology, along with its application and relevance in conventional and emerging wireless communication networks, including Wireless Local Area Networks (WLANs), Worldwide Interoperability for Microwave Access (WiMAX), Long Term Evolution (LTE) and Cognitive Radio Networks. The book also includes Quality of service (QoS) studies under dynamic and unpredictable network conditions, which examine the reliability of both legacy systems And the upcoming pervasive computing systems. Further, it explains how the heuristic-based learning algorithms that are used in VoIP communications may help develop today’s technology in the area of autonomous systems.This book is a valuable source of information for academics and researchers, as it provides state-of-theart research in VoIP technology. It is also of interest to network designers, application architects, and service providers looking for a coherent understanding of VoIP across a wide range of devices, network applications and user categories."

"Buku ini membahas tentang penerapan dan permasalahan seputar gas dan minyak yang diperuntukkan bagi para pengembang gas dalam cakupan wilayah industri. Beberapa pembahasan seperti latar belakang teknis, CCU Hot Gas Expanders, bahan kimia, sistem dan operasional yang umum terjadi, kerusakan bahan material, dan aspek pendukung terkait lainnya untuk para pengguna atau pengembang untuk mencari sebuah pemecahan masalah"

"Teknologi Light Emitting Diode (LED) telah merevolusi pencahayaan dengan efisiensi energi yang tinggi dan umur panjang, tetapi permasalahan operasional sering menyebabkan lampu LED dibuang meskipun kerusakannya hanya terjadi pada beberapa komponen. Penelitian ini dilakukan karena limbah lampu LED dapat dimanfaatkan kembali, sehingga mengurangi pencemaran limbah elektronik dan mendukung keberlanjutan. Metode yang dilakukan meliputi studi literatur, pengumpulan dan analisis sampel lampu LED bekas dari berbagai merek, identifikasi pola kerusakan seperti matinya chip LED, serta desain dan simulasi rangkaian konversi AC ke DC. Hasil penelitian menunjukkan bahwa kerusakan utama pada lampu LED disebabkan oleh chip LED mati yang dapat diperbaiki dengan metode substitusi, serta konversi dari AC ke DC dapat dilakukan dengan menambahkan rangkaian pendukung, memberikan solusi untuk memanfaatkan limbah LED secara efektif.

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Light Emitting Diode (LED) technology has revolutionized lighting with high energy efficiency and longevity, but operational problems often cause LED lights to be discarded even if the damage only occurs to a few components. This research was conducted because LED lamp waste can be reused, thereby reducing electronic waste pollution and supporting sustainability. The methods carried out include literature studies, collection and analysis of used LED lamp samples from various brands, identification of damage patterns such as the death of LED chips, and design and simulation of AC to DC conversion circuits. The results show that the main damage to LED lights is caused by dead LED chips which can be repaired by substitution methods, as well as the conversion from AC to DC can be done by adding a supporting circuit, providing a solution to effectively utilize LED waste. "