answer:The reflector that can change the wave's polarization, according to the given article, is the ionosphere. The ionosphere, a layer of the Earth's atmosphere filled with ions and free electrons, has significant effects on radio wave propagation. One of these effects is the ability to change the polarization of waves. This means that it alters the plane in which the electric field of the radio wave vibrates. This reflection-induced change in polarization is a critical consideration for radio signals that depend on ionospheric reflection, also known as skywave propagation. Such signals cannot retain a consistent polarization after their reflection off the ionosphere because the ionosphere's electron density varies both temporally and spatially, leading to these inconsistent polarization effects. Thus, the wave's polarization that was initially set when the wave was transmitted may not be the same when the wave reaches its receiving point after bouncing off the ionosphere. In contrast, for the line-of-sight communication or ground wave propagation where direct paths are involved, the original polarization of transmitted waves - whether horizontal or vertical - is generally maintained at the receiving location. This is due to the lack of reflection surfaces that could potentially alter the wave's polarization status. Polarization is a significant parameter in antenna design and signal propagation, as the matching of the receiving antenna's polarization to that of the transmitter's can make a tremendous difference in received signal strength. Therefore, understanding the behaviour of polarization upon reflection, particularly from the ionosphere for radio signals, is significant in the field of telecommunications and radio signal propagation.

answer:Yes, the answer is "use computers for everyday sounds." Most modern studios have adopted the use of computers and technology to create everyday sounds, making the process more efficient and less time-consuming for Foley artists. This allows them to focus on creating unique and more complex sound effects required for films.

answer:Now is the time to join Presidents Obama and Medvedev in implementing disarmament. This statement expresses a viewpoint that demonstrates the need for collaboration between nations, particularly the United States and Russia, in the area of disarmament. The mention of Presidents Obama and Medvedev reflects the time when both leaders played an essential role in furthering the dialogue around reducing their countries' nuclear stockpiles and promoting global security. During the period when Barack Obama served as the President of the United States (2009-2017) and Dmitry Medvedev as the President of Russia (2008-2012), both leaders had emphasized the significance of disarmament initiatives. Under their leadership, the two nations signed the New START (Strategic Arms Reduction Treaty) in 2010, which aimed to further reduce strategic arms in both the United States and Russia. The New START treaty has been a crucial step towards promoting a more secure and peaceful international environment. It has limited the number of deployed strategic nuclear warheads and implemented verification mechanisms that have been mutually beneficial for both countries. Additionally, this treaty has contributed to a more transparent and predictable relationship between the United States and Russia, enhancing trust and cooperation in global nuclear disarmament efforts. Disarmament is an essential component of global security, as it seeks to reduce the number of weapons and threats posed by their existence. By joining Presidents Obama and Medvedev in implementing disarmament, nations can work together in achieving a more secure and stable international atmosphere. This action would involve collaboration, negotiation, and a shared responsibility for the establishment and maintenance of a peaceful world. Cooperation between nations in the area of disarmament can positively impact the overall progress towards global nuclear disarmament by reinforcing international norms and strengthening existing treaties and frameworks. This joint effort can also potentially lead to further strides in other areas of global security, such as preventing the proliferation of nuclear weapons and materials to states and non-state actors, and responding to emerging security threats such as cyber warfare and terrorism. In conclusion, the statement stresses the importance of joining forces with Presidents Obama and Medvedev in implementing disarmament as a means of promoting international peace, stability, and security. The collaboration between nations, particularly between the United States and Russia, demonstrates a commitment to fostering a safer global environment, reducing the threats posed by nuclear weapons, and contributing to a more secure and peaceful future for all.

answer:IOM helps families in landslide-hit Kashmir area.