Frequency

I snap my fingers and the air around me shifts then vibrates. When the air vibrates, it creates a sound wave. Our ears pick up this wave and translates it so we can understand and comprehend what amazing intangible creation is before us. A middle C key is pushed on a piano, the hammer hits the tuned wire, the wire vibrates and creates the sound humans recognize as a simple C. As time has passed, humans have progressed from single note instruments, to handwriting sheet music for orchestras, to…

How does sound travel through the three parts of the ear? There are three parts of the ear in which sound must travel; the outer, middle, and inner ear. Sound does not simply go from the outer ear to the inner ear; it must become four different types of energy in order to pass through. These types of energy are acoustic, mechanical, hydraulic, and electrical. Ears work in a pair to help us localize and discriminate where sounds are coming from in our surroundings. It seems hard to believe but…

2.3.1 Frequency attacks Techniques that are based on deterministic encryption are usually susceptible to frequency attacks. The party receiving the “so thought” secure encrypted data can perform a frequency analysis on selected fields in order to uncover the original data. For example, if the attacker has access to the demographic or census data of a particular population, he could calculate the frequency of a selected field and try to map it to the encrypted data frequencies to deduce a…

measured by frequency measure similar to that used by Mäkinen, Borodulin, Laatikainen, Fogelholm and Prättälä (2009). The stem: “During a regular week before the military service, how often do you exercise at least 30 minutes so that you sweat and get out of breath?” was followed by seven options response scale that was collapsed into four categories: Not at all to once a month = 1, 2–4 times/month = 2, 2–3 times/ week = 3, 4–7 times/week = 4. Eating was measured by a 36-item food frequency…

showing antenna attachment, where it’s turned on, where the battery is plugged in, and channel button} Changing the Channel button changes the frequency that the goggles display, like changing the station on the radio. The dip switch on RubiQ’s PCB controls the frequency band that the VTX transmits, so that during a race, different drones can be…

Abstract: The goal of the study was to develop and validate a weekly, semi-quantitative food frequency questionnaire for low-income women. The food frequency questionnaire (FFQ) was developed from an already existing, validated 195-item FFQ that was based on a standard reference period of 1-month. Mean daily servings of each food item in the original 195-item FFQ were calculated to determine the most frequently consumed food items. Emphasis on these items reduced the resultant FFQ to 95 items.…

on gaining new resources from war. Therefore, Raaflaub highlights that while political and social gains were important, there did exist the question of being able to obtain wealth, resources, and survival through warfare, which would increase the frequency of war. Even more central to Raaflaub’s argument is his insistence that the ancient Romans engaged in a type of preemptive warfare out of fear of being conquered. The ancient Romans remembered well the fear of tyranny after the…

The frequency of hate crimes has risen over the past two years drastically, in not only the United States, but all over the world. Daily, we see news articles and broadcasts about gun violence, murders, and suspected hate crimes, so much so that people merely shrug it off if the person(s) who died or injured were not close to them. The New York Times printed an article by Elisabetta Povoledo on February 3, 2018 about a suspected hate crime in Rome, Italy. The article outlines the scene of the…

planned system can management the entry and exit of scholars to and from the bus exploitation RFID (Radio Frequency Identification)…

for her brains also. So, Hedy Lamar invented frequency hopping. Frequency hopping is a secret communication used to guide torpedoes. She showed it to the Navy, but they told her it wouldn't work. She then watched in silence as other inventors took her invention to new heights. She signed the patent over to the Navy and never made any money from her invention. Hedy never got any credit for inventing frequency hopping. She changed the world. Frequency hopping is used in wifi. The inventors of…