Since the mid-20th century, there has been considerable debate over how the earliest forms of life evolved and how to classify them, especially at the kingdom and domain levels and organisms that are or have been considered bacteria.

" Since the term " CPU " is generally defined as a device for software ( computer program ) execution, the earliest devices that could rightly be called CPUs came with the advent of the stored-program computer.

Since the earliest days of the Church, the authorship has been debated.

Since the earliest times, Christians have sung " psalms and hymns and spiritual songs ", both in private devotions and in corporate worship (; ; ; ; ; cf.

Since it takes many generations for a microbe and a new host species to co-evolve, an emerging pathogen may hit its earliest victims especially hard.

Since the earliest samurai government in Japan, during the Kamakura period ( 1185 – 1333 ), sword fighting, together with horse riding and archery, were the main martial pursuits of the military clans.

Since there is evidence that Lombardic participated in, and indeed shows some of the earliest evidence for, the High German consonant shift, it is classified as an Elbe Germanic or Upper German dialect.

Since the earliest Christian times, it has focused on the redemptive act of God in the death and resurrection of Christ.

Since the Sami are the earliest ethnic group in the area, they are consequently considered an indigenous population of the area.

Since the earliest days of Esperanto, the colour green has been used as a symbol of mutual recognition and it appears prominently in all Esperanto symbols.

Since the name Shiraz has been used primarily in Australia in modern times, while the earliest Australian documents use the spelling " Scyras ", the name Shiraz has been speculated ( among others by Jancis Robinson ) to be in fact a so-called " strinization " of Syrah's name via Scyras.

Since the 1970s, however, Egyptologists have concluded that the text dates from the New Kingdom at the earliest.

Since the earliest days of computer architecture, some CPUs have added several additional arithmetic logic units ( ALUs ) to run in parallel.

Since the earliest know MK V is dated 1916, these sources are probably referring to the earlier MK I, MK II, MK III & MK IV Morse and Schrader helmets.

Since Jeremiah emerges well trained and fully literate from his earliest preaching, the relationship between him and the Shaphan family has been used to suggest that he may have trained at the scribal school in Jerusalem over which Shaphan presided.

The earliest microscopic signs of BPH usually begin between the age of 30 and 50 years old in the PUG, which are posterior to the proximal urethra .< sup >: 694 </ sup > However, the majority of growth eventually occurs in the TZ .< sup >: 694 </ sup > In addition to these two classic areas, the peripheral zone ( PZ ) of the prostate is also involved to a lesser extent .< sup >: 695 </ sup > Since prostatic cancer also occurs in the PZ, BPH nodules in the PZ are often biopsied to rule out cancer .< sup >: 695 </ sup >

Since Xu Shen did not have access to Chinese characters in their earliest forms, his analysis cannot always be taken as authoritative.

Since the Jiahu site dates from about 6600 BC, it predates the earliest confirmed Chinese writing by more than 5, 000 years.

Since the earliest days Smethport has been considered a topographic crown jewel of the Pennsylvania Wilds region.

Since the earliest days Smethport operated and serviced its transmission lines and purchased electricity from outside providers.

Since earliest times, rivers have been the arteries of inland travel, and the history of exploration in North America has been based in its waterways.

Since the earliest Russian entry, Siberia was administered by voyevodas.

Since the earliest record of medical history, the coexistence of intense, divergent moods within an individual has been recognized by such writers as Homer, Hippocrates and Aretaeus, the last describing the vacillating presence of impulsive anger, melancholia and mania within a single person.

Since Inachus was dated 400 years after the flood of Ogyges and that Ogyges himself was considered a Titan or a primordial Autochthon " from earliest ages ", some ancient Greek or Romans dated the creation ( beginning with Chaos or Gaia ) only a few hundred years before Ogyges ( 2376 – 2050 BC ).

Since the earliest cave paintings, people have been fascinated by the representation of movement.

Since, necessarily, no time elapses in this pretemporal void, then there could be no alteration, and therefore nothing ( including time ) would ever come to be: so the antithesis is proven.

Since their invention and subsequent proliferation in the mid-20th Century, ballpoint pens have proven to be a versatile art medium for professional artists as well as amateur doodlers.

Since then it has been proven to work, although efficiency to the level required has not yet been accomplished.

Since Brown and Lenneberg believed that the objective reality denoted by language was the same for speakers of all languages, they decided to test how different languages codified the same message differently and whether differences in codification could be proven to affect behavior.

Since its discovery, study of the Codex Sinaiticus has proven to be extremely useful to scholars for the purposes of biblical translation.

Since none have been proven to exist already then the drive is impossible to construct, even if the metric is physically meaningful.

Since being fielded, Hellfire missiles have proven their effectiveness in combat in Operation Just Cause in Panama, Operation Desert Storm in Persian Gulf, Operation Allied Force in Yugoslavia, Operation Enduring Freedom in Afghanistan, in Operation Iraqi Freedom, where they have been fired successfully from Apache and Super Cobra attack helicopters, Kiowa scout helicopters, and Predator unmanned combat air vehicles ( UCAVs ).

Since the Tangut's founding father, Li Deming, was not a very conservative ruler, the Tangut people began to absorb more and more of the Chinese culture that surrounded them, but never lost their actual identity, as is proven by the vast amount of literature which survived the Tangut state itself.

Since Bloch's theorem applies only to periodic potentials, and since unceasing random movements of atoms in a crystal disrupt periodicity, this use of Bloch's theorem is only an approximation, but it has proven to be a tremendously valuable approximation, without which most solid-state physics analysis would be intractable.

Since they had the accommodation and had proven they could hold well-organized games, they received some support.

Since the onset of knock is sensitive to the in-cylinder pressure, temperature and autoignition chemistry associated with the local mixture compositions within the combustion chamber, simulations which account for all of these aspects have thus proven most effective in determining knock operating limits and enabling engineers to determine the most appropriate operating strategy.

Since the Catholic Church reform of 1983, one miracle must be proven to have taken place through the intercession of the person to be beatified, though the medical investigations of the Church are privately conducted and therefore subject to speculation about their methods.

Since their original discovery and the elucidation of their structure, these interaction modules have proven ubiquitous in the biological world.

Since the initial Adleman experiments, advances have been made and various Turing machines have been proven to be constructible.

Since practical products require at least several hundred million atoms, this technique has not yet proven practical in forming a real product.

Since the late 1990s, the Gillette model has proven very popular and successful for inkjet printer manufacturers, where profit is derived from the sale of expensive ink cartridges.

Since the Roth ruling, to be declared obscene a work of literature had to be proven by censors to: 1 ) appeal to prurient interest, 2 ) be patently offensive, and 3 ) have no redeeming social value.

Since the Banach – Alaoglu theorem is proven via Tychonoff's theorem, it relies on the ZFC axiomatic framework, in particular the axiom of choice.

Since then, she has proven herself to be incapable of personal growth, and Milholland himself has suggested that redemption is not in the cards for her.

Since the Canadian economy entered recession in 2008, temporary foreign workers have proven to be the most vulnerable to job losses.

Since Sapir's death in 1939 linguists have spent their time researching his proposals, and generally there have been two opposing camps in this endeavor: the so-called " lumpers " who are generally favorably inclined towards notions of genetic relationships, and the " splitters " who are generally critical of such proposals expecting successful family relations to be proven by the most rigorous standards of scholarship.

Since modern police frequencies are on a restricted bandwidth it is unlikely that an unlicensed party will interrupt communication ; all operators on a frequency are assumed to be authorized to utilize a channel unless proven otherwise.

Since 2003 flag-carrier, low-cost and regional airlines including Aer Lingus, MyTravelLite, Bmibaby, Ryanair, Aer Arann, flybe, Lufthansa and EasyJet have added several routes linking the airport with UK and European mainland destinations and though not all routes have proven successful, by 2005 the airport was handling 500, 000 passengers per annum.

Since records of Yongle's search of Jianwen were mostly destroyed, the truthfulness of this chat has yet to be proven.

Since this has been shown to be not proven ( 1903 ), Hans Waitz's elaborate study has appeared ( 1904 ), but his view was evidently formed earlier.