Two low pitch berimbaus ( called berra-boi and médio ) form the base and a high pitch berimbau ( called viola ) makes variations and improvisations.

Two Guinean MiGs made a low flyover of Freetown and Toure placed the Guinean military on alert ' because of the serious troubles affecting the fraternal peoples of Sierra Leone.

Two output terminals can be defined at the active devices, which will have complementary states ; one will have high voltage while the other has low voltage, ( except during the brief transitions from one state to the other ).

* Two inputs ( from the low and high level switches ) represented by contacts of the float switches

Two public figures claimed in interviews that one of the main causes for poverty in Africa is a low average intelligence, an idea which caused great controversy.

Two plays later, Kiick scored on a 1-yard blast behind Little and Csonka with just 18 seconds left in the half, and Yepremian's extra point gave the Dolphins a lead of 14 – 0 before halftime ( once again, Yepremian noticed the kick was too low ).

Two hands give the player more control, while one hand can generate a slice shot, applying backspin on the ball to produce a low trajectory bounce.

Two Space Shuttle missions – the ill-fated STS-51-L ( ended by the Challenger disaster ) and STS-61-E – were scheduled to observe Halley's Comet from low Earth orbit.

Two additional genera usually form in the low altitude range, but may be based at higher levels under conditions of very low humidity.

Two important characteristics of CMOS devices are high noise immunity and low static power consumption.

Open All Hours aired one series in 1976 on BBC Two but was not renewed due to low ratings.

In 2011 the Nine Network announced a new " Home of Comedy " line-up with comedy shows such as Two and a Half Men, The Big Bang Theory and other American sitcoms along with the launch of a live comedy show Ben Elton Live From Planet Earth which was cancelled after only three episodes due to low ratings.

Two practices were of particular concern: the " roundsman " system, where overseers hired out paupers as cheap labour, and the Speenhamland system, which subsidised low wages without relief.

Two economic advantages the municipality has are its well development commerce and services sector and its low rate of unemployment.

Two additional amplifiers detected this low frequency and triggered the 4th tube ( a gas-filled thyratron ) to set off the detonator.

Two other pentaquark states were reported albeit with low statistical significance — the ( ddss ), with a mass of and the ( uudd ), with a mass of.

Two or three white eggs are laid in a stick-nest located in a bush or low branch.

Two young caribou at Wager Bay during low tide

Two partners in love who lacked a right to connubium might enter into concubinage, or even a highborn woman who loved a man of low social status.

Two focal objectives of low cost leadership and differentiation clash with each other resulting in no proper direction for a firm.

Two factors limit the usefulness of ELF communications channels: the low data transmission rate of a few characters per minute and, to a lesser extent, the one-way nature due to the impracticality of installing an antenna of the required size on a submarine ( antennas need to be of exceptional size for the users to achieve successful communication ).

Two British Railways Class 416 trains working on the North London Line pass at Stratford ( low level ) station.

The season finished on a low note: even though Cheltenham had used 51 players, they had conceded over 100 goals in all competitions, and they were relegated back to League Two on the penultimate day of the season after three seasons in League One.

Two unmanned CSM's, one unmanned LM and one manned CSM were carried into space by Saturn IB launch vehicles for low Earth orbit Apollo missions.

Two of the major design goals of 3270's are related to this: minimizing the amount of data transmitted, and minimizing the frequency of interrupts to the mainframe.

Two oscillators that have the same frequency and different phases have a phase difference, and the oscillators are said to be out of phase with each other.

Two frequency converters would be used, and the radio would be a double conversion superheterodyne ; a common example is a television receiver where the audio information is obtained from a second stage of intermediate-frequency conversion.

Two curves are drawn ; one for the linearly amplified signal at an input tone frequency, one for a nonlinear product.

Two newer studies examined the frequency of collisions in two regional districts using the latest analytical tools.

Two were used for all low-power stations and the large stations each got their own frequency.

Two separate frequency bands have been allocated by the FCC for air-ground telephone service.

Two signals are transmitted on one out of 40 ILS channels in the carrier frequency range between 108. 10 MHz and 111. 95 MHz ( with the 100 kHz first decimal digit always odd, so 108. 10, 108. 15, 108. 30, and so on are LOC frequencies but 108. 20, 108. 25, 108. 40, and so on are not ).

Two major kinds of test modes can be used to probe the viscoelastic properties of polymers: temperature sweep and frequency sweep tests.

Two applications of frequency response analysis are related but have different objectives.

Two months after completion of withdrawal patients suffering from medication overuse headache typically notice a marked reduction in migraine and other headache frequency and intensity.

Two examples of analytic interests are population frequency distributions and prediction.

Two measurements of the same physical quantity often exhibit different noise levels in different frequency ranges.

Two way voice radio communication and regular news broadcasts by voice using vacuum tube technology to provide high frequency amplitude modulated radio transmission became common by the mid-1920s.

Two incremental improvements over the exponential horn include slightly better support for low frequency extension and a somewhat broader high-frequency coverage pattern.

Two different intervals are perceived to be the same when the pairs of pitches involved share the same frequency ratio.

Two years later, on 2 August 1980, 2NM changed its frequency again from 1458 kHz to 981 kHz to improve reception in parts of the Upper Hunter.

Two useful introductions to the fundamental theory underlying the unit of selection issue and debate, which also present examples of multi-level selection from the entire range of the biological hierarchy ( typically with entities at level N-1 competing for increased representation, i. e., higher frequency, at the immediately higher level N, e. g., organisms in populations or cell lineages in organisms ), are Richard Lewontin's classic piece " The Units of Selection " and John Maynard-Smith and Eörs Szathmáry's co-authored book, The Major Transitions in Evolution.

Two different values for its frequency have been given: 1420. 356 MHz ( J. D. Kraus ) and 1420. 4556 MHz ( J. R. Ehman ).

Two common CTAF allocations are UNICOM, a licensed non-government base station that provides air-to-ground communications ( and vice versa ) and may also serve as a CTAF when in operation, and MULTICOM, a frequency allocation ( without a physical base station ) that is reserved as a CTAF for airports without other facilities.

Two years later, on August 21, 1959, the Catholic University of Chile made an experimental transmission between its main campus and the El Mercurio newspaper headquarters, both in Santiago's downtown, inaugurating the country's second channel, Canal 13, occupying frequency 2 for a few years ( now 13 ).

Two transmitters cannot broadcast on the same frequency in the same area as this would cause co-channel interference.