Compression efficiency of encoders is typically defined by the bit rate, because compression ratio depends on the bit depth and sampling rate of the input signal. Nevertheless, compression ratios are often published. They may use the Compact Disc (CD) parameters as references (44.1 kHz, 2 channels at 16 bits per channel or 2×16 bit), or sometimes the Digital Audio Tape (DAT) SP parameters (48 kHz, 2×16 bit). Compression ratios with this latter reference are higher, which demonstrates the problem with use of the term compression ratio for lossy encoders.
What defines the compression efficiency of encoders?
bit rate


Input: Federal Bureau of Investigation
The FBI is near-impenetrable, with applicants intensely scrutinized and assessed over an extended period. To apply to become an FBI agent, one must be between the ages of 23 and 37. Due to the decision in Robert P. Isabella v. Department of State and Office of Personnel Management, 2008 M.S.P.B. 146, preference-eligible veterans may apply after age 37. In 2009, the Office of Personnel Management issued implementation guidance on the Isabella decision. The applicant must also hold American citizenship, be of high moral character, have a clean record, and hold at least a four-year bachelor's degree. At least three years of professional work experience prior to application is also required. All FBI employees require a Top Secret (TS) security clearance, and in many instances, employees need a TS/SCI (Top Secret/Sensitive Compartmented Information) clearance. To obtain a security clearance, all potential FBI personnel must pass a series of Single Scope Background Investigations (SSBI), which are conducted by the Office of Personnel Management. Special Agents candidates also have to pass a Physical Fitness Test (PFT), which includes a 300-meter run, one-minute sit-ups, maximum push-ups, and a 1.5-mile (2.4 km) run. Personnel must pass a polygraph test with questions including possible drug use. Applicants who fail polygraphs may not gain employment with the FBI.

Who conducts SSBIs?
Output: Office of Personnel Management


Input: Article: The Roman Empire reached its greatest territorial extent during the 2nd century AD; the following two centuries witnessed the slow decline of Roman control over its outlying territories. Economic issues, including inflation, and external pressure on the frontiers combined to make the 3rd century politically unstable, with emperors coming to the throne only to be rapidly replaced by new usurpers. Military expenses increased steadily during the 3rd century, mainly in response to the war with Sassanid Persia, which revived in the middle of the 3rd century. The army doubled in size, and cavalry and smaller units replaced the legion as the main tactical unit. The need for revenue led to increased taxes and a decline in numbers of the curial, or landowning, class, and decreasing numbers of them willing to shoulder the burdens of holding office in their native towns. More bureaucrats were needed in the central administration to deal with the needs of the army, which led to complaints from civilians that there were more tax-collectors in the empire than tax-payers.

Now answer this question: In what century did the revival of Persia occur under the Sassanids?

Output: 3rd century


Article: On 1 September, Germany invaded Poland from the west. Within the first few days of the invasion, Germany began conducting massacres of Polish and Jewish civilians and POWs. These executions took place in over 30 towns and villages in the first month of German occupation. The Luftwaffe also took part by strafing fleeing civilian refugees on roads and carrying out a bombing campaign. The Soviet Union assisted German air forces by allowing them to use signals broadcast by the Soviet radio station at Minsk allegedly "for urgent aeronautical experiments".

Question: What day did German invade Poland?
Ans: 1 September


Here is a question about this article: Polytechnic Institutes are technological universities, many dating back to the mid-19th century. A handful of world-renowned Elite American universities include the phrases "Institute of Technology", "Polytechnic Institute", "Polytechnic University", or similar phrasing in their names; these are generally research-intensive universities with a focus on engineering, science and technology. The earliest and most famous of these institutions are, respectively, Rensselaer Polytechnic Institute (RPI, 1824), New York University Tandon School of Engineering (1854) and the Massachusetts Institute of Technology (MIT, 1861). Conversely, schools dubbed "technical colleges" or "technical institutes" generally provide post-secondary training in technical and mechanical fields, focusing on training vocational skills primarily at a community college level—parallel and sometimes equivalent to the first two years at a bachelor's degree-granting institution.
What is the answer to this question: In what year was Rensselaer Polytechnic Institute founded?
****
So... 1824


Article: In Greece, there are 2 "Polytechnics" part of the public higher education in Greece and they confer a 5-year Diplom Uni (300E.C.T.S – I.S.C.E.D. 5A), the National Technical University of Athens and the Technical University of Crete. Also, there are Greek Higher Technological Educational Institutes (Ανώτατα Τεχνολογικά Εκπαιδευτικά Ιδρύματα – Α.T.E.I). After the N.1404/1983 Higher Education Reform Act (Ν.1404/1983 - 2916/2001 - Ν. 3549/2007 - N. 3685/2008 - N. 4009/2011) the Technological Educational Institute constitute, a parallel and equivalent with universities part of the public higher education in Greece. They confer 4-year bachelor's degree (Diplom FH) (240E.C.T.S – I.S.C.E.D. 5A).

Question: What's the name of the Act that changed how Greek public institutes of technology were designated?
Ans:
Higher Education Reform Act