Bøker av Ali Keyhani

The Persian King Darius I (reigned 522-486 BCE) constructed a canal connecting the Nile to the Red Sea- an ancient precursor to the Suez Canal. Artachaies was a Persian engineer who engineered the Xerxes Canal in Greece. The Persian Empire witnessed remarkable contributions to various fields, particularly during the Sassanian period (224-651 CE). Barbad was a Persian musician from the Sassanid empire. Barbad is remembered in many documents and has been named as a remarkably highly skilled musician of his time.Bozorgmehr made significant contributions to medicine. The "Book of Medicine" by Bozorgmehr contains knowledge from Greek and Indian sources and reflects advancements in medical understanding. The Persian mathematician and scholar Kushyar ibn Labban wrote extensively on mathematics. The Sassanian Empire was known for its impressive architectural achievements. The construction of structures like the Taq Kasra, a grand arch, highlighted advanced engineering skills. The intellectual achievements of pre-Islamic Persia laid the foundation for further developments during the Islamic Golden Age.However, I must admit there are a few surviving works and that's mostly because Persia was conquered and burnt to the ground twice by Alexander and Arab Muslims. At the heart of this cultural mosaic are the Persian prophets, individuals who played pivotal roles in shaping the spiritual landscape of the region. These prophets, often associated with the Zoroastrian faith, have left an indelible mark on the religious consciousness of the Persian people. Another significant Persian prophet was Mani, who emerged centuries later in the 3rd century CE. Mani founded Manichaeism, a syncretic religion that integrated elements of Zoroastrianism, Buddhism, and Christianity. His teachings focused on the eternal struggle between the forces of light and darkness, and the need for spiritual enlightenment to overcome the material world's illusions. Mani's influence extended beyond the borders of Persia, gaining followers across the ancient world. In the narrative of Persian prophets, one cannot overlook the influential figure of Mazdak, a reformer who emerged during a period of societal transformation in 6th-century Sassanian Persia. Babak Khorram-Dinan, also known as Babak the Khorram-Dinan, was a Persian revolutionary and leader of the Khurramites, a social and religious movement that emerged in the 8th century during the Abbasid Caliphate. Babak played a significant role in challenging the Abbasid rule and advocating for social justice and equality. He was a follower of Mazdak. Then Persians changed Islam and created a new prophet named "Mahdi" in Shia Islam. Mahdi is believed by Shia Muslims to be the guided and awaited leader who will emerge in the future to restore justice and righteousness. Mahdi" means "guided one" or "the guided one." Shia Muslims believe that the Mahdi is the twelfth Imam, known as Imam al-Mahdi, who went into occultation and will reappear to bring justice to the world. Then the last Persian Prophet is Bahaullah. Bahaullah claimed to be the latest in a line of divine messengers that includes figures like Abraham, Moses, Buddha, Jesus, and Muhammad. Baha'u'llah's public declaration of his mission occurred in 1863, in the garden of Ridvan (meaning Paradise) in Baghdad, Iraq. Baha'u'llah's teachings emphasize the oneness of humanity, the unity of all religions, the importance of education, the equality of men and women, and the elimination of prejudice.

SHADOWS ARE HANGING ON 1515 CARDIFF.Boredom settled heavily on Cardiff Road; its weight palpable in the air. The adage that misfortunes always arrive in threes was dismissed as nothing more than an old wives' tale, as misfortunes, it seemed, had a will of their own, arriving in any number fate deemed fit. To exist as a worldly being among other human beings, enduring whatever calamities fate thrust one's way, to remain steadfast and unyielding, unbroken by the trials of life - this, it seemed, was the ultimate purpose of existence. To witness the passage of time, to persist in the face of adversity, and to greet each new dawn, whether in life or death. Life, with its ever-unpredictable nature, had taken an unexpected turn, weaving a story of love intertwined with the unanticipated twists of karma. A heavy, painful silence hung in the air as she sat there, her husband's gaze fixed upon her. The silence seemed to stretch endlessly, its weight becoming increasingly unbearable with each passing moment. Faced with the oppressive stillness, she summoned a grin and met her husband's gaze, breaking the tension as she asked, "What becomes of people as they grow older?" The question lingered in the air, a poignant reflection of the uncertainties that accompany the passage of time.

The Updated Third Edition Provides a Systems Approach to Sustainable Green Energy Production and Contains Analytical Tools for the Design of Renewable MicrogridsThe revised third edition of Design of Smart Power Grid Renewable Energy Systems integrates three areas of electrical engineering: power systems, power electronics, and electric energy conversion systems. The book also addresses the fundamental design of wind and photovoltaic (PV) energy microgrids as part of smart-bulk power-grid systems.In order to demystify the complexity of the integrated approach, the author first presents the basic concepts, and then explores a simulation test bed in MATLAB® in order to use these concepts to solve a basic problem in the development of smart grid energy system. Each chapter offers a problem of integration and describes why it is important. Then the mathematical model of the problem is formulated, and the solution steps are outlined. This step is followed by developing a MATLAB® simula-tion test bed. This important book:* Reviews the basic principles underlying power systems* Explores topics including: AC/DC rectifiers, DC/AC inverters, DC/DC converters, and pulse width modulation (PWM) methods* Describes the fundamental concepts in the design and operation of smart grid power grids* Supplementary material includes a solutions manual and PowerPoint presentations for instructorsWritten for undergraduate and graduate students in electric power systems engineering, researchers, and industry professionals, the revised third edition of Design of Smart Power Grid Renewable Energy Systems is a guide to the fundamental concepts of power grid integration on microgrids of green energy sources.

* Provides practical oriented system analysis and synthesis that is instructional and inspiring for engineers. * Topics cover major power conversion applications that tend to help professionals from a variety of industries. * Includes well designed and class tested homework and project assignments.