143-425: Durness ( Scottish Gaelic : Diùranais ) is a village and civil parish in the north-west Highlands of Scotland . It lies on the north coast of the country in the traditional county of Sutherland , around 120 miles (190 kilometres) north of Inverness . The area is remote, and the parish is huge and sparsely populated, covering an area from east of Loch Eriboll to Cape Wrath , the most north-westerly point of
286-470: A fractal surface, such as rocks or soil, and are used by navigation radars. A radar beam follows a linear path in vacuum but follows a somewhat curved path in atmosphere due to variation in the refractive index of air, which is called the radar horizon . Even when the beam is emitted parallel to the ground, the beam rises above the ground as the curvature of the Earth sinks below the horizon. Furthermore,
429-424: A transmitter that emits radio waves known as radar signals in predetermined directions. When these signals contact an object they are usually reflected or scattered in many directions, although some of them will be absorbed and penetrate into the target. Radar signals are reflected especially well by materials of considerable electrical conductivity —such as most metals, seawater , and wet ground. This makes
572-442: A 19% fall in bilingual speakers between the 1911 and 1921 Censuses. Michelle MacLeod of Aberdeen University has said that there was no other period with such a high fall in the number of monolingual Gaelic speakers: "Gaelic speakers became increasingly the exception from that point forward with bilingualism replacing monolingualism as the norm for Gaelic speakers." The Linguistic Survey of Scotland (1949–1997) surveyed both
715-564: A Pictish substrate. In 1018, after the conquest of Lothian (theretofore part of England and inhabited predominantly by speakers of Northumbrian Old English ) by the Kingdom of Scotland , Gaelic reached its social, cultural, political, and geographic zenith. Colloquial speech in Scotland had been developing independently of that in Ireland since the eighth century. For the first time,
858-402: A celebration of music, poetry, theatre and other cultural activities in celebration of the spirit of John Lennon who, when in childhood, took summer holidays in the village. Lennon returned for a visit in 1969 with Yoko Ono and their children but the visit was cut short when Lennon drove his car off the road by Loch Eriboll . The track " In My Life " from Rubber Soul is said to be based on
1001-524: A central feature of court life there. The semi-independent Lordship of the Isles in the Hebrides and western coastal mainland remained thoroughly Gaelic since the language's recovery there in the 12th century, providing a political foundation for cultural prestige down to the end of the 15th century. By the mid-14th century what eventually came to be called Scots (at that time termed Inglis ) emerged as
1144-823: A challenge to revitalization efforts which occur outside the home. Positive engagements between language learners and native speakers of Gaelic through mentorship has proven to be productive in socializing new learners into fluency. In the 2022 census, 3,551 people claimed Gaelic as their 'main language.' Of these, 1,761 (49.6%) were in Na h-Eileanan Siar, 682 (19.2%) were in Highland, 369 were in Glasgow City and 120 were in City of Edinburgh; no other council area had as many as 80 such respondents. Gaelic has long suffered from its lack of use in educational and administrative contexts and
1287-593: A clearance when the women of Ceannabeinne township defied the Sheriff Officer sent to deliver the summons of eviction and subsequent disorder occurred at the village inn in Durness when a second attempt was made, causing the officers to be again run out of town. In the first attempt, in August, 1841, a party of sheriff officers and constables were attacked by a mob of about 400 people who were armed with weapons, at
1430-551: A dialect known as Canadian Gaelic has been spoken in Canada since the 18th century. In the 2021 census , 2,170 Canadian residents claimed knowledge of Scottish Gaelic, a decline from 3,980 speakers in the 2016 census . There exists a particular concentration of speakers in Nova Scotia , with historic communities in other parts of Canada having largely disappeared. Scottish Gaelic is classed as an indigenous language under
1573-482: A different dielectric constant or diamagnetic constant from the first, the waves will reflect or scatter from the boundary between the materials. This means that a solid object in air or in a vacuum , or a significant change in atomic density between the object and what is surrounding it, will usually scatter radar (radio) waves from its surface. This is particularly true for electrically conductive materials such as metal and carbon fibre, making radar well-suited to
SECTION 10
#17327800304961716-540: A full radar system, that he called a telemobiloscope . It operated on a 50 cm wavelength and the pulsed radar signal was created via a spark-gap. His system already used the classic antenna setup of horn antenna with parabolic reflector and was presented to German military officials in practical tests in Cologne and Rotterdam harbour but was rejected. In 1915, Robert Watson-Watt used radio technology to provide advance warning of thunderstorms to airmen and during
1859-489: A full range of language skills: speaking, understanding, reading and writing Gaelic. 40.2% of Scotland's Gaelic speakers said that they used Gaelic at home. To put this in context, the most common language spoken at home in Scotland after English and Scots is Polish, with about 1.1% of the population, or 54,000 people. The 2011 UK Census showed a total of 57,375 Gaelic speakers in Scotland (1.1% of population over three years old), of whom only 32,400 could also read and write
2002-586: A language ideology at odds with revitalization efforts on behalf of new speakers, state policies (such as the Gaelic Language Act), and family members reclaiming their lost mother tongue. New learners of Gaelic often have a positive affective stance to their language learning, and connect this learning journey towards Gaelic language revitalization. The mismatch of these language ideologies, and differences in affective stance, has led to fewer speaking opportunities for adult language learners and therefore
2145-426: A modern house. A plaque on the gable of the new house reads “John Lennon 1940-1980 Singer and Songwriter and member of The Beatles Spent many childhood holidays here”. The Balnakeil craft village, established in 1963 on an unused military radar station near to Durness was the subject of a 1974 BBC documentary "The Road to Balnakeil" by Derek Cooper . Ceramic artist Lotte Glob was among early residents. The village
2288-805: A national centre for Gaelic Language and Culture, based in Sleat , on the Isle of Skye . This institution is the only source for higher education which is conducted entirely in Scottish Gaelic. They offer courses for Gaelic learners from beginners into fluency. They also offer regular bachelors and graduate programs delivered entirely in Gaelic. Concerns have been raised around the fluency achieved by learners within these language programs because they are disconnected from vernacular speech communities. In regard to language revitalization planning efforts, many feel that
2431-749: A physics instructor at the Imperial Russian Navy school in Kronstadt , developed an apparatus using a coherer tube for detecting distant lightning strikes. The next year, he added a spark-gap transmitter . In 1897, while testing this equipment for communicating between two ships in the Baltic Sea , he took note of an interference beat caused by the passage of a third vessel. In his report, Popov wrote that this phenomenon might be used for detecting objects, but he did nothing more with this observation. The German inventor Christian Hülsmeyer
2574-404: A poem about Durness which Lennon wrote on a teenage holiday in the area, although most of the original poem's meaning was lost during songwriting with Paul McCartney . A monument dedicated to John Lennon has been erected in a memorial garden by the village hall and has three large stone slabs inscribed with lyrics from “In My Life”. The house where he stayed has now been demolished and replaced with
2717-403: A predominantly Gaelic speaking area. The landscape of the Durness area is a stark contrast to the surrounding areas due to a down-faulted, isolated wedge of Cambro - Ordovician Durness Group carbonates, also historically (and often now informally) known as the 'Durness Limestone'. Although the unit outcrops as far south as Skye , the full sequence can only be seen in the Durness area, hence
2860-549: A process of Gaelicisation (which may have begun generations earlier) was clearly under way during the reigns of Caustantín and his successors. By a certain point, probably during the 11th century, all the inhabitants of Alba had become fully Gaelicised Scots, and Pictish identity was forgotten. Bilingualism in Pictish and Gaelic, prior to the former's extinction, led to the presence of Pictish loanwords in Gaelic and syntactic influence which could be considered to constitute
3003-610: A proportion of Gaelic speakers greater than 65% (the highest value is in Barvas , Lewis , with 64.1%). In addition, no civil parish on mainland Scotland has a proportion of Gaelic speakers greater than 20% (the highest is in Ardnamurchan , Highland , with 19.3%). Out of a total of 871 civil parishes in Scotland, the proportion of Gaelic speakers exceeds 50% in seven parishes, 25% in 14 parishes, and 10% in 35 parishes. Decline in traditional areas has recently been balanced by growth in
SECTION 20
#17327800304963146-498: A proposal for further intensive research on radio-echo signals from moving targets to take place at NRL, where Taylor and Young were based at the time. Similarly, in the UK, L. S. Alder took out a secret provisional patent for Naval radar in 1928. W.A.S. Butement and P. E. Pollard developed a breadboard test unit, operating at 50 cm (600 MHz) and using pulsed modulation which gave successful laboratory results. In January 1931,
3289-732: A pulsed system, and the first such elementary apparatus was demonstrated in December 1934 by the American Robert M. Page , working at the Naval Research Laboratory . The following year, the United States Army successfully tested a primitive surface-to-surface radar to aim coastal battery searchlights at night. This design was followed by a pulsed system demonstrated in May 1935 by Rudolf Kühnhold and
3432-442: A rescue. For similar reasons, objects intended to avoid detection will not have inside corners or surfaces and edges perpendicular to likely detection directions, which leads to "odd" looking stealth aircraft . These precautions do not totally eliminate reflection because of diffraction , especially at longer wavelengths. Half wavelength long wires or strips of conducting material, such as chaff , are very reflective but do not direct
3575-536: A situation where new learners struggle to find opportunities to speak Gaelic with fluent speakers. Affect is the way people feel about something, or the emotional response to a particular situation or experience. For Gaelic speakers, there is a conditioned and socialized negative affect through a long history of negative Scottish media portrayal and public disrespect, state mandated restrictions on Gaelic usage, and highland clearances . This negative affect towards speaking openly with non-native Gaelic speakers has led to
3718-435: A stronger force on 17 September 1841, again consisting of a party of sheriff officers and special constables, arriving the following evening. They were observed approaching and eventually 200 to 300 local people had gathered, all armed with weapons, to oppose them. The mob made a rush to seize Mackay, but they were defeated and Mackay and his men made it to the inn. However, the local mob now with an additional 100 people, smashed
3861-677: A system might do, Wilkins recalled the earlier report about aircraft causing radio interference. This revelation led to the Daventry Experiment of 26 February 1935, using a powerful BBC shortwave transmitter as the source and their GPO receiver setup in a field while a bomber flew around the site. When the plane was clearly detected, Hugh Dowding , the Air Member for Supply and Research , was very impressed with their system's potential and funds were immediately provided for further operational development. Watson-Watt's team patented
4004-625: A translation of the New Testament. In 1798, four tracts in Gaelic were published by the Society for Propagating the Gospel at Home, with 5,000 copies of each printed. Other publications followed, with a full Gaelic Bible in 1801. The influential and effective Gaelic Schools Society was founded in 1811. Their purpose was to teach Gaels to read the Bible in their own language. In the first quarter of
4147-514: A wide region and direct fighter aircraft towards targets. Marine radars are used to measure the bearing and distance of ships to prevent collision with other ships, to navigate, and to fix their position at sea when within range of shore or other fixed references such as islands, buoys, and lightships. In port or in harbour, vessel traffic service radar systems are used to monitor and regulate ship movements in busy waters. Meteorologists use radar to monitor precipitation and wind. It has become
4290-907: A writeup on the apparatus was entered in the Inventions Book maintained by the Royal Engineers. This is the first official record in Great Britain of the technology that was used in coastal defence and was incorporated into Chain Home as Chain Home (low) . Before the Second World War , researchers in the United Kingdom, France , Germany , Italy , Japan , the Netherlands , the Soviet Union , and
4433-719: Is a Goidelic language (in the Celtic branch of the Indo-European language family ) native to the Gaels of Scotland . As a Goidelic language, Scottish Gaelic, as well as both Irish and Manx , developed out of Old Irish . It became a distinct spoken language sometime in the 13th century in the Middle Irish period, although a common literary language was shared by the Gaels of both Ireland and Scotland until well into
Durness - Misplaced Pages Continue
4576-572: Is a collection of former MoD units dating from the 1950s, which now house various independent shops. Durness is the birthplace and burial site of the poet Rob Donn , born at Achnacaillich in Strathmore in 1714. The Gaelic publication Am Fèillire remarked, in 1875, that he was known for being shrewd and satirical, as well as moral and mannerly. In 2007 Durness hosted the John Lennon Northern Lights Festival ,
4719-490: Is a significant step forward for the recognition of Gaelic both at home and abroad and I look forward to addressing the council in Gaelic very soon. Seeing Gaelic spoken in such a forum raises the profile of the language as we drive forward our commitment to creating a new generation of Gaelic speakers in Scotland." Bilingual road signs, street names, business and advertisement signage (in both Gaelic and English) are gradually being introduced throughout Gaelic-speaking regions in
4862-452: Is a simplification for transmission in a vacuum without interference. The propagation factor accounts for the effects of multipath and shadowing and depends on the details of the environment. In a real-world situation, pathloss effects are also considered. Frequency shift is caused by motion that changes the number of wavelengths between the reflector and the radar. This can degrade or enhance radar performance depending upon how it affects
5005-436: Is a system that uses radio waves to determine the distance ( ranging ), direction ( azimuth and elevation angles ), and radial velocity of objects relative to the site. It is a radiodetermination method used to detect and track aircraft , ships , spacecraft , guided missiles , motor vehicles , map weather formations , and terrain . A radar system consists of a transmitter producing electromagnetic waves in
5148-451: Is as follows, where F D {\displaystyle F_{D}} is Doppler frequency, F T {\displaystyle F_{T}} is transmit frequency, V R {\displaystyle V_{R}} is radial velocity, and C {\displaystyle C} is the speed of light: Passive radar is applicable to electronic countermeasures and radio astronomy as follows: Only
5291-523: Is home to well-known chocolate manufacturers Cocoa Mountain . There are claims that the rugged scenery around Durness and Cape Wrath may have inspired Tolkien in creating his Middle Earth epics. A bench placed on the shore of Loch Borralie by actress Juliet Stevenson commemorates her elder brother Johnny who died in a car accident at the Kyle of Durness in 2000. Durness is on the A838 road . This links
5434-567: Is intended. Radar relies on its own transmissions rather than light from the Sun or the Moon, or from electromagnetic waves emitted by the target objects themselves, such as infrared radiation (heat). This process of directing artificial radio waves towards objects is called illumination , although radio waves are invisible to the human eye as well as optical cameras. If electromagnetic waves travelling through one material meet another material, having
5577-411: Is no evidence that Gaelic was ever widely spoken. Many historians mark the reign of King Malcolm Canmore ( Malcolm III ) between 1058 and 1093 as the beginning of Gaelic's eclipse in Scotland. His wife Margaret of Wessex spoke no Gaelic, gave her children Anglo-Saxon rather than Gaelic names, and brought many English bishops, priests, and monastics to Scotland. When Malcolm and Margaret died in 1093,
5720-543: Is said to have been built by the monks from Dornoch Cathedral in the 13th century. At Ceannabeinne lies "Clach a Breitheanas" or the Judgement Stone. This was said to be where judgement was meted out to malefactors and those found guilty were thrown over the cliff to their doom below. The parish of Durness was for centuries a part of Dùthaich MhicAoidh, the land of the Clan Mackay , who held their title to
5863-465: Is the largest village in the northwestern corner of Scotland, has a population of around 400, and is on the A838 road . It is located on the north coast between the towns of Thurso , 72 mi (116 km) to the east, and Ullapool 68 mi (109 km), to the south. This area is notable for being the most sparsely populated region in Western Europe . Until some 50 years ago, Durness was
Durness - Misplaced Pages Continue
6006-417: Is the range. This yields: This shows that the received power declines as the fourth power of the range, which means that the received power from distant targets is relatively very small. Additional filtering and pulse integration modifies the radar equation slightly for pulse-Doppler radar performance , which can be used to increase detection range and reduce transmit power. The equation above with F = 1
6149-837: The European Charter for Regional or Minority Languages , which the UK Government has ratified, and the Gaelic Language (Scotland) Act 2005 established a language-development body, Bòrd na Gàidhlig . The Scottish Parliament is considering a Scottish Languages Bill which proposes to give the Gaelic and Scots languages official status in Scotland. Aside from "Scottish Gaelic", the language may also be referred to simply as "Gaelic", pronounced / ˈ ɡ æ l ɪ k / GAL -ik in English . However, "Gaelic" / ˈ ɡ eɪ l ɪ k / GAY -lik also refers to
6292-628: The Nyquist frequency , since the returned frequency otherwise cannot be distinguished from shifting of a harmonic frequency above or below, thus requiring: Or when substituting with F D {\displaystyle F_{D}} : As an example, a Doppler weather radar with a pulse rate of 2 kHz and transmit frequency of 1 GHz can reliably measure weather speed up to at most 150 m/s (340 mph), thus cannot reliably determine radial velocity of aircraft moving 1,000 m/s (2,200 mph). In all electromagnetic radiation ,
6435-555: The Outer Hebrides , accommodation ethics exist amongst native or local Gaelic speakers when engaging with new learners or non-locals. Accommodation ethics, or ethics of accommodation, is a social practice where local or native speakers of Gaelic shift to speaking English when in the presence of non-Gaelic speakers out of a sense of courtesy or politeness. This accommodation ethic persists even in situations where new learners attempt to speak Gaelic with native speakers. This creates
6578-717: The RAF's Pathfinder . The information provided by radar includes the bearing and range (and therefore position) of the object from the radar scanner. It is thus used in many different fields where the need for such positioning is crucial. The first use of radar was for military purposes: to locate air, ground and sea targets. This evolved in the civilian field into applications for aircraft, ships, and automobiles. In aviation , aircraft can be equipped with radar devices that warn of aircraft or other obstacles in or approaching their path, display weather information, and give accurate altitude readings. The first commercial device fitted to aircraft
6721-688: The Scottish Lowlands . Between the 2001 and 2011 censuses, the number of Gaelic speakers rose in nineteen of the country's 32 council areas. The largest absolute gains were in Aberdeenshire (+526), North Lanarkshire (+305), the Aberdeen City council area (+216), and East Ayrshire (+208). The largest relative gains were in Aberdeenshire (+0.19%), East Ayrshire (+0.18%), Moray (+0.16%), and Orkney (+0.13%). In 2018,
6864-440: The electromagnetic spectrum . One example is lidar , which uses predominantly infrared light from lasers rather than radio waves. With the emergence of driverless vehicles, radar is expected to assist the automated platform to monitor its environment, thus preventing unwanted incidents. As early as 1886, German physicist Heinrich Hertz showed that radio waves could be reflected from solid objects. In 1895, Alexander Popov ,
7007-460: The radio or microwaves domain, a transmitting antenna , a receiving antenna (often the same antenna is used for transmitting and receiving) and a receiver and processor to determine properties of the objects. Radio waves (pulsed or continuous) from the transmitter reflect off the objects and return to the receiver, giving information about the objects' locations and speeds. Radar was developed secretly for military use by several countries in
7150-407: The reflective surfaces . A corner reflector consists of three flat surfaces meeting like the inside corner of a cube. The structure will reflect waves entering its opening directly back to the source. They are commonly used as radar reflectors to make otherwise difficult-to-detect objects easier to detect. Corner reflectors on boats, for example, make them more detectable to avoid collision or during
7293-786: The significant increase in pupils in Gaelic-medium education since that time is unknown. Gaelic Medium Education is one of the primary ways that the Scottish Government is addressing Gaelic language shift. Along with the Bòrd na Gàidhlig policies, preschool and daycare environments are also being used to create more opportunities for intergenerational language transmission in the Outer Hebrides. However, revitalization efforts are not unified within Scotland or Nova Scotia, Canada. One can attend Sabhal Mòr Ostaig ,
SECTION 50
#17327800304967436-534: The "new boy" Arnold Frederic Wilkins to conduct an extensive review of available shortwave units. Wilkins would select a General Post Office model after noting its manual's description of a "fading" effect (the common term for interference at the time) when aircraft flew overhead. By placing a transmitter and receiver on opposite sides of the Potomac River in 1922, U.S. Navy researchers A. Hoyt Taylor and Leo C. Young discovered that ships passing through
7579-477: The 17th century. Most of modern Scotland was once Gaelic-speaking, as evidenced especially by Gaelic-language place names. In the 2011 census of Scotland , 57,375 people (1.1% of the Scottish population aged over three years old) reported being able to speak Gaelic, 1,275 fewer than in 2001. The highest percentages of Gaelic speakers were in the Outer Hebrides . Nevertheless, there is a language revival , and
7722-413: The 1920s went on to lead the U.K. research establishment to make many advances using radio techniques, including the probing of the ionosphere and the detection of lightning at long distances. Through his lightning experiments, Watson-Watt became an expert on the use of radio direction finding before turning his inquiry to shortwave transmission. Requiring a suitable receiver for such studies, he told
7865-601: The 19th century, the SSPCK (despite their anti-Gaelic attitude in prior years) and the British and Foreign Bible Society distributed 60,000 Gaelic Bibles and 80,000 New Testaments. It is estimated that this overall schooling and publishing effort gave about 300,000 people in the Highlands some basic literacy. Very few European languages have made the transition to a modern literary language without an early modern translation of
8008-404: The 2011 Census. The 2011 total population figure comes from table KS101SC. The numbers of Gaelic speakers relate to the numbers aged 3 and over, and the percentages are calculated using those and the number of the total population aged 3 and over. Across the whole of Scotland, the 2011 census showed that 25,000 people (0.49% of the population) used Gaelic at home. Of these, 63.3% said that they had
8151-460: The 2012–13 academic year the school had 22 children enrolled, a figure which is predicted to decline to 13 by 2026–27. Children transfer to Kinlochbervie High School which opened in the 1990s. Before this school opened children had to lodge during the week to attend schools at Dornoch Academy or Golspie High School . Cape Wrath , to the west of the parish across the Kyle of Durness is the site of
8294-407: The 4th–5th centuries CE, by settlers from Ireland who founded the Gaelic kingdom of Dál Riata on Scotland's west coast in present-day Argyll . An alternative view has been voiced by archaeologist Ewan Campbell , who has argued that the putative migration or takeover is not reflected in archaeological or placename data (as pointed out earlier by Leslie Alcock ). Campbell has also questioned
8437-569: The Bible; the lack of a well known translation may have contributed to the decline of Scottish Gaelic. Counterintuitively, access to schooling in Gaelic increased knowledge of English. In 1829, the Gaelic Schools Society reported that parents were unconcerned about their children learning Gaelic, but were anxious to have them taught English. The SSPCK also found Highlanders to have significant prejudice against Gaelic. T. M. Devine attributes this to an association between English and
8580-568: The Cape Wrath Training Area, a military live firing range. The area is used for gunnery practice by naval and air forces as well as a training area for land forces. It is the only military firing range in the UK where aircraft are allowed to deliver 1,000-pound (450-kilogram) bombs. Scottish Gaelic language Scottish Gaelic ( / ˈ ɡ æ l ɪ k / , GAL -ik ; endonym : Gàidhlig [ˈkaːlɪkʲ] ), also known as Scots Gaelic or simply Gaelic ,
8723-546: The EU's institutions. The Scottish government had to pay for the translation from Gaelic to other European languages . The deal was received positively in Scotland; Secretary of State for Scotland Jim Murphy said the move was a strong sign of the UK government's support for Gaelic. He said; "Allowing Gaelic speakers to communicate with European institutions in their mother tongue is a progressive step forward and one which should be welcomed". Culture Minister Mike Russell said; "this
SECTION 60
#17327800304968866-538: The Forth–Clyde line and along the northeastern coastal plain as far north as Moray. Norman French completely displaced Gaelic at court. The establishment of royal burghs throughout the same area, particularly under David I , attracted large numbers of foreigners speaking Old English. This was the beginning of Gaelic's status as a predominantly rural language in Scotland. Clan chiefs in the northern and western parts of Scotland continued to support Gaelic bards who remained
9009-684: The Gaelic Act falls so far short of the status accorded to Welsh that one would be foolish or naïve to believe that any substantial change will occur in the fortunes of the language as a result of Bòrd na Gàidhlig 's efforts. On 10 December 2008, to celebrate the 60th anniversary of the Universal Declaration of Human Rights , the Scottish Human Rights Commission had the UDHR translated into Gaelic for
9152-762: The Gaelic aristocracy rejected their anglicised sons and instead backed Malcolm's brother Domnall Bán ( Donald III ). Donald had spent 17 years in Gaelic Ireland and his power base was in the thoroughly Gaelic west of Scotland. He was the last Scottish monarch to be buried on Iona , the traditional burial place of the Gaelic Kings of Dàl Riada and the Kingdom of Alba. However, during the reigns of Malcolm Canmore's sons, Edgar, Alexander I and David I (their successive reigns lasting 1097–1153), Anglo-Norman names and practices spread throughout Scotland south of
9295-619: The Highland and Island region. In 1616, the Privy Council proclaimed that schools teaching in English should be established. Gaelic was seen, at this time, as one of the causes of the instability of the region. It was also associated with Catholicism. The Society in Scotland for the Propagation of Christian Knowledge (SSPCK) was founded in 1709. They met in 1716, immediately after the failed Jacobite rising of 1715 , to consider
9438-416: The Highlands and Islands, including Argyll. In many cases, this has simply meant re-adopting the traditional spelling of a name (such as Ràtagan or Loch Ailleart rather than the anglicised forms Ratagan or Lochailort respectively). Some monolingual Gaelic road signs, particularly direction signs, are used on the Outer Hebrides , where a majority of the population can have a working knowledge of
9581-726: The Inner Hebridean dialects of Tiree and Islay, and even a few native speakers from Western Highland areas including Wester Ross , northwest Sutherland , Lochaber and Argyll . Dialects on both sides of the Straits of Moyle (the North Channel ) linking Scottish Gaelic with Irish are now extinct, though native speakers were still to be found on the Mull of Kintyre , on Rathlin and in North East Ireland as late as
9724-410: The Irish language ( Gaeilge ) and the Manx language ( Gaelg ). Scottish Gaelic is distinct from Scots , the Middle English -derived language which had come to be spoken in most of the Lowlands of Scotland by the early modern era . Prior to the 15th century, this language was known as Inglis ("English") by its own speakers, with Gaelic being called Scottis ("Scottish"). Beginning in
9867-414: The Scottish mainland. The population is dispersed and includes a number of townships including Kempie, Eriboll , Laid , Rispond, Sangobeg , Leirinmore , Smoo, Sangomore, Durine, Balnakeil and Keoldale. The name could be Norse "Dyrnes", meaning "deer/animal headland". No one knows for sure where the name derives; it has variously been translated as from "Dorainn nis" tempest point, or "Dhu thir nis"
10010-433: The Smoo Cave Hotel. The village is also used as a base by visitors to Cape Wrath . The main attractions in Durness are Smoo Cave , a conjoined sea cave and freshwater cave with a small river running through it and a waterfall in wet weather, unspoilt beaches backed by cliffs and the local seabirds , seals , porpoises and minke whales . The surrounding coastline is some of Europe's most isolated and spectacular, with
10153-428: The UK Government as Welsh . With the advent of devolution , however, Scottish matters have begun to receive greater attention, and it achieved a degree of official recognition when the Gaelic Language (Scotland) Act was enacted by the Scottish Parliament on 21 April 2005. The key provisions of the Act are: After its creation, Bòrd na Gàidhlig required a Gaelic Language Plan from the Scottish Government. This plan
10296-787: The United States, independently and in great secrecy, developed technologies that led to the modern version of radar. Australia, Canada, New Zealand, and South Africa followed prewar Great Britain's radar development, Hungary and Sweden generated its radar technology during the war. In France in 1934, following systematic studies on the split-anode magnetron , the research branch of the Compagnie générale de la télégraphie sans fil (CSF) headed by Maurice Ponte with Henri Gutton, Sylvain Berline and M. Hugon, began developing an obstacle-locating radio apparatus, aspects of which were installed on
10439-826: The Western Isles (−1,745), Argyll & Bute (−694), and Highland (−634). The drop in Stornoway , the largest parish in the Western Isles by population, was especially acute, from 57.5% of the population in 1991 to 43.4% in 2011. The only parish outside the Western Isles over 40% Gaelic-speaking is Kilmuir in Northern Skye at 46%. The islands in the Inner Hebrides with significant percentages of Gaelic speakers are Tiree (38.3%), Raasay (30.4%), Skye (29.4%), Lismore (26.9%), Colonsay (20.2%), and Islay (19.0%). Today, no civil parish in Scotland has
10582-589: The Western Isles. The Scottish Qualifications Authority offer two streams of Gaelic examination across all levels of the syllabus: Gaelic for learners (equivalent to the modern foreign languages syllabus) and Gaelic for native speakers (equivalent to the English syllabus). An Comunn Gàidhealach performs assessment of spoken Gaelic, resulting in the issue of a Bronze Card, Silver Card or Gold Card. Syllabus details are available on An Comunn's website. These are not widely recognised as qualifications, but are required for those taking part in certain competitions at
10725-522: The age and reliability of the medieval historical sources speaking of a conquest. Instead, he has inferred that Argyll formed part of a common Q-Celtic -speaking area with Ireland, connected rather than divided by the sea, since the Iron Age. These arguments have been opposed by some scholars defending the early dating of the traditional accounts and arguing for other interpretations of the archaeological evidence. Regardless of how it came to be spoken in
10868-463: The annual mods . In October 2009, a new agreement allowed Scottish Gaelic to be formally used between Scottish Government ministers and European Union officials. The deal was signed by Britain's representative to the EU, Sir Kim Darroch , and the Scottish government . This did not give Scottish Gaelic official status in the EU but gave it the right to be a means of formal communications in
11011-537: The arrest of Oshchepkov and his subsequent gulag sentence. In total, only 607 Redut stations were produced during the war. The first Russian airborne radar, Gneiss-2 , entered into service in June 1943 on Pe-2 dive bombers. More than 230 Gneiss-2 stations were produced by the end of 1944. The French and Soviet systems, however, featured continuous-wave operation that did not provide the full performance ultimately synonymous with modern radar systems. Full radar evolved as
11154-479: The beam path caused the received signal to fade in and out. Taylor submitted a report, suggesting that this phenomenon might be used to detect the presence of ships in low visibility, but the Navy did not immediately continue the work. Eight years later, Lawrence A. Hyland at the Naval Research Laboratory (NRL) observed similar fading effects from passing aircraft; this revelation led to a patent application as well as
11297-603: The bill be strengthened, a revised bill was published; the main alteration was that the guidance of the Bòrd is now statutory (rather than advisory). In the committee stages in the Scottish Parliament, there was much debate over whether Gaelic should be given 'equal validity' with English. Due to executive concerns about resourcing implications if this wording was used, the Education Committee settled on
11440-498: The carbonate bedrock and resultant lime-rich soils. An unusually wide variety of rock types for such a relatively small area can be found within the parish. This is partly due to extensive faulting in the area which has placed a variety rocks of different ages ( Archaean – Ordovician ) in contact with one another. A down-faulted section of the Moine Thrust can also be seen in the area at both Faraid Head and Sango Bay despite
11583-625: The census of pupils in Scotland showed 520 students in publicly funded schools had Gaelic as the main language at home, an increase of 5% from 497 in 2014. During the same period, Gaelic medium education in Scotland has grown, with 4,343 pupils (6.3 per 1000) being educated in a Gaelic-immersion environment in 2018, up from 3,583 pupils (5.3 per 1000) in 2014. Data collected in 2007–2008 indicated that even among pupils enrolled in Gaelic medium schools, 81% of primary students and 74% of secondary students report using English more often than Gaelic when speaking with their mothers at home. The effect on this of
11726-568: The cities and professors of Celtic from universities who sought to preserve the language. The Education (Scotland) Act 1872 provided universal education in Scotland, but completely ignored Gaelic in its plans. The mechanism for supporting Gaelic through the Education Codes issued by the Scottish Education Department were steadily used to overcome this omission, with many concessions in place by 1918. However,
11869-626: The cliff top and the dunes, partly due to the high sea-shell content of the sands in the Durness area. As a result, Durness is part of the North West Highlands Geopark and is a popular destination for both postgraduate and undergraduate geology students during the summer. Tourists are catered for by a campsite spectacularly sited on the cliffs above the beach (with easy access down to the beach), an SYHA hostel, housed by some converted army buildings, bed and breakfast accommodation and two hotels and restaurants, Mackay's and
12012-499: The concept of 'equal respect'. It is not clear what the legal force of this wording is. The Act was passed by the Scottish Parliament unanimously, with support from all sectors of the Scottish political spectrum, on 21 April 2005. Under the provisions of the Act, it will ultimately fall to BnG to secure the status of the Gaelic language as an official language of Scotland. Some commentators, such as Éamonn Ó Gribín (2006) argue that
12155-408: The detection of aircraft and ships. Radar absorbing material , containing resistive and sometimes magnetic substances, is used on military vehicles to reduce radar reflection . This is the radio equivalent of painting something a dark colour so that it cannot be seen by the eye at night. Radar waves scatter in a variety of ways depending on the size (wavelength) of the radio wave and the shape of
12298-476: The detection process. As an example, moving target indication can interact with Doppler to produce signal cancellation at certain radial velocities, which degrades performance. Sea-based radar systems, semi-active radar homing , active radar homing , weather radar , military aircraft, and radar astronomy rely on the Doppler effect to enhance performance. This produces information about target velocity during
12441-411: The detection process. This also allows small objects to be detected in an environment containing much larger nearby slow moving objects. Doppler shift depends upon whether the radar configuration is active or passive. Active radar transmits a signal that is reflected back to the receiver. Passive radar depends upon the object sending a signal to the receiver. The Doppler frequency shift for active radar
12584-626: The device in patent GB593017. Development of radar greatly expanded on 1 September 1936, when Watson-Watt became superintendent of a new establishment under the British Air Ministry , Bawdsey Research Station located in Bawdsey Manor , near Felixstowe, Suffolk. Work there resulted in the design and installation of aircraft detection and tracking stations called " Chain Home " along the East and South coasts of England in time for
12727-499: The dialect of the Scottish Gaelic language, and also mixed use of English and Gaelic across the Highlands and Islands. Dialects of Lowland Gaelic have been defunct since the 18th century. Gaelic in the Eastern and Southern Scottish Highlands, although alive until the mid-20th century, is now largely defunct. Although modern Scottish Gaelic is dominated by the dialects of the Outer Hebrides and Isle of Skye, there remain some speakers of
12870-590: The early 19th century the population of the parish was around 1,100, spread widely throughout scattered small townships. The population today is much diminished, with the whole of the Durness area suffering greatly from the Highland Clearances , the first in 1809 and thereafter throughout the greater part of the 19th century until the Crofting Act of the 1886 finally gave crofters a measure of security of tenure. The Durness Riots of 1841 were caused by
13013-538: The electric field is perpendicular to the direction of propagation, and the electric field direction is the polarization of the wave. For a transmitted radar signal, the polarization can be controlled to yield different effects. Radars use horizontal, vertical, linear, and circular polarization to detect different types of reflections. For example, circular polarization is used to minimize the interference caused by rain. Linear polarization returns usually indicate metal surfaces. Random polarization returns usually indicate
13156-473: The entire area in front of it, and then used one of Watson-Watt's own radio direction finders to determine the direction of the returned echoes. This fact meant CH transmitters had to be much more powerful and have better antennas than competing systems but allowed its rapid introduction using existing technologies. A key development was the cavity magnetron in the UK, which allowed the creation of relatively small systems with sub-meter resolution. Britain shared
13299-582: The entire region of modern-day Scotland was called Scotia in Latin, and Gaelic was the lingua Scotica . In southern Scotland , Gaelic was strong in Galloway , adjoining areas to the north and west, West Lothian , and parts of western Midlothian . It was spoken to a lesser degree in north Ayrshire , Renfrewshire , the Clyde Valley and eastern Dumfriesshire . In south-eastern Scotland, there
13442-466: The firm GEMA [ de ] in Germany and then another in June 1935 by an Air Ministry team led by Robert Watson-Watt in Great Britain. In 1935, Watson-Watt was asked to judge recent reports of a German radio-based death ray and turned the request over to Wilkins. Wilkins returned a set of calculations demonstrating the system was basically impossible. When Watson-Watt then asked what such
13585-560: The first time. However, given there are no longer any monolingual Gaelic speakers, following an appeal in the court case of Taylor v Haughney (1982), involving the status of Gaelic in judicial proceedings, the High Court ruled against a general right to use Gaelic in court proceedings. While the goal of the Gaelic Language Act was to aid in revitalization efforts through government mandated official language status,
13728-479: The initiatives must come from within Gaelic speaking communities, be led by Gaelic speakers, and be designed to serve and increase fluency within the vernacular communities as the first and most viable resistance to total language shift from Gaelic to English. Currently, language policies are focused on creating new language speakers through education, instead of focused on how to strengthen intergenerational transmission within existing Gaelic speaking communities. In
13871-431: The inn of Durine in the parish of Durness. The whole party were injured by the mob and some of them narrowly escaped with their lives. Their eviction papers were also burned by the mob in the presence of the leading sheriff officer who was of the surname Campbell. The second attempt was made by the police super-intendant, Phillip Mackay, but he was treated in a similar manner and returned home. Mackay made another attempt with
14014-653: The land extending from Melvich in the east to Kylesku in the west. The area is also important to the Clan Morrison , who live with their traditional allies, the Clan Mackay. "Many sanguinary battles, still recounted by tradition , were fought between the Mcleods and Macaulays on one side and the Morisons on the other. At last the Morisons were forced to leave Lewis and take refuge with that part of their clan which
14157-502: The language. Compared with the 2001 Census, there has been a diminution of about 1300 people. This is the smallest drop between censuses since the Gaelic-language question was first asked in 1881. The Scottish government's language minister and Bòrd na Gàidhlig took this as evidence that Gaelic's long decline has slowed. The main stronghold of the language continues to be the Outer Hebrides ( Na h-Eileanan Siar ), where
14300-455: The language. These omit the English translation entirely. Bilingual railway station signs are now more frequent than they used to be. Practically all the stations in the Highland area use both English and Gaelic, and the use of bilingual station signs has become more frequent in the Lowlands of Scotland, including areas where Gaelic has not been spoken for a long time. Radar Radar
14443-532: The late 15th century, it became increasingly common for such speakers to refer to Scottish Gaelic as Erse ("Irish") and the Lowland vernacular as Scottis . Today, Scottish Gaelic is recognised as a separate language from Irish, so the word Erse in reference to Scottish Gaelic is no longer used. Based on medieval traditional accounts and the apparent evidence from linguistic geography, Gaelic has been commonly believed to have been brought to Scotland, in
14586-597: The main thrust area being found several miles east at Loch Eriboll . The thrust exposures within Sango Bay are the most accessible localities to observe the Moine Thrust Zone. Additionally, Sango Bay (geologically a graben ) also exposes some of the best basin bounding fault outcrops in the British Isles . Faraid Head is also important geologically for one of Scotland's largest sand dune systems where
14729-459: The members of Highland school boards tended to have anti-Gaelic attitudes and served as an obstacle to Gaelic education in the late 19th and early 20th century. Loss of life due to World War I and the 1919 sinking of the HMY Iolaire , combined with emigration, resulted in the 1910s seeing unprecedented damage to the use of Scottish Gaelic, with a 46% fall in monolingual speakers and
14872-734: The mid-20th century. Records of their speech show that Irish and Scottish Gaelic existed in a dialect chain with no clear language boundary. Some features of moribund dialects have been preserved in Nova Scotia, including the pronunciation of the broad or velarised l ( l̪ˠ ) as [w] , as in the Lochaber dialect. The Endangered Languages Project lists Gaelic's status as "threatened", with "20,000 to 30,000 active users". UNESCO classifies Gaelic as " definitely endangered ". The 1755–2001 figures are census data quoted by MacAulay. The 2011 Gaelic speakers figures come from table KS206SC of
15015-532: The modern era. Some of this was driven by policy decisions by government or other organisations, while some originated from social changes. In the last quarter of the 20th century, efforts began to encourage use of the language. The Statutes of Iona , enacted by James VI in 1609, was one piece of legislation that addressed, among other things, the Gaelic language. It required the heirs of clan chiefs to be educated in lowland, Protestant, English-speaking schools. James VI took several such measures to impose his rule on
15158-480: The name of the unit. This thick sequence (c. 800 m or 2,625 ft) of dolomites with subordinate limestones and chert is softer than the surrounding hills which are formed of more resistant Lewisian Gneiss or Torridonian sandstones, sometimes capped by Cambrian Quartzite . As a result, the local area is generally flatter and more fertile than other areas in the North West Highlands due to
15301-575: The nearby Clo Mor Cliffs being the highest on the British mainland, at 922 feet (281 m) high. Balnakeil Old Church, is a scheduled monument with the grave of Donuill Mac Morraichaidh, a serial bandit and murderer, inside one wall of the church so, it is said, "that his enemies couldn't walk over his grave". The area around Loch Croispol and Loch Borrallie abounds in archeological interest, from brochs to round houses to medieval and pre-clearances settlements. The Balnakeil Craft Village can be found approximately 1 mile (1.5 kilometres) outside Durness and
15444-434: The number of speakers of the language under age 20 did not decrease between the 2001 and 2011 censuses. In the 2022 census of Scotland , it was found that 2.5% of the Scottish population had some skills in Gaelic, or 130,161 persons. Of these, 69,701 people reported speaking the language, with a further 46,404 people reporting that they understood the language, but did not speak, read, or write in it. Outside of Scotland,
15587-508: The ocean liner Normandie in 1935. During the same period, Soviet military engineer P.K. Oshchepkov , in collaboration with the Leningrad Electrotechnical Institute , produced an experimental apparatus, RAPID, capable of detecting an aircraft within 3 km of a receiver. The Soviets produced their first mass production radars RUS-1 and RUS-2 Redut in 1939 but further development was slowed following
15730-695: The official language of government and law. Scotland's emergent nationalism in the era following the conclusion of the Wars of Scottish Independence was organized using Scots as well. For example, the nation's great patriotic literature including John Barbour's The Brus (1375) and Blind Harry's The Wallace (before 1488) was written in Scots, not Gaelic. By the end of the 15th century, English/Scots speakers referred to Gaelic instead as 'Yrisch' or 'Erse', i.e. Irish and their own language as 'Scottis'. A steady shift away from Scottish Gaelic continued into and through
15873-531: The outbreak of World War II in 1939. This system provided the vital advance information that helped the Royal Air Force win the Battle of Britain ; without it, significant numbers of fighter aircraft, which Great Britain did not have available, would always have needed to be in the air to respond quickly. The radar formed part of the " Dowding system " for collecting reports of enemy aircraft and coordinating
16016-459: The outcome of the act is distanced from the actual minority language communities. It helps to create visibility of the minority language in civil structures, but does not impact or address the lived experiences of the Gaelic speaker communities wherein the revitalization efforts may have a higher return of new Gaelic speakers. Efforts are being made to concentrate resources, language planning, and revitalization efforts towards vernacular communities in
16159-560: The overall proportion of speakers is 52.2%. Important pockets of the language also exist in the Highlands (5.4%) and in Argyll and Bute (4.0%) and Inverness (4.9%). The locality with the largest absolute number is Glasgow with 5,878 such persons, who make up over 10% of all of Scotland's Gaelic speakers. Gaelic continues to decline in its traditional heartland. Between 2001 and 2011, the absolute number of Gaelic speakers fell sharply in
16302-701: The parish to the A836 at Tongue to the east, and loops around the coast through Rhiconich near Kinlochbervie , to meet the A836 again north of Lairg , which generally runs to Bonar Bridge and the south. The road is single track along most of its length. Bus services are sparse in the area, although one bus a day links Durness with the Far North railway line at Lairg railway station . This provides rail services north to Wick and south to Inverness . Durness primary school educates children from nursery age to age 11. In
16445-1370: The period before and during World War II . A key development was the cavity magnetron in the United Kingdom , which allowed the creation of relatively small systems with sub-meter resolution. The term RADAR was coined in 1940 by the United States Navy as an acronym for "radio detection and ranging". The term radar has since entered English and other languages as an anacronym , a common noun, losing all capitalization . The modern uses of radar are highly diverse, including air and terrestrial traffic control, radar astronomy , air-defense systems , anti-missile systems , marine radars to locate landmarks and other ships, aircraft anti-collision systems, ocean surveillance systems, outer space surveillance and rendezvous systems, meteorological precipitation monitoring, radar remote sensing , altimetry and flight control systems , guided missile target locating systems, self-driving cars , and ground-penetrating radar for geological observations. Modern high tech radar systems use digital signal processing and machine learning and are capable of extracting useful information from very high noise levels. Other systems which are similar to radar make use of other parts of
16588-474: The point of the black land; or from the Norse for deerpoint. Or even from the main village "Durine" which would translate as "Dubh Rinn" the black (or fertile) promontory, with the Norse "ness" tacked onto an existing Gaelic name. The area has been inhabited since prehistoric times. To the south of the village at the former township of Cnocbreac can be seen the remains of two parallel turf dykes of Neolithic origin,
16731-706: The primary tool for short-term weather forecasting and watching for severe weather such as thunderstorms , tornadoes , winter storms , precipitation types, etc. Geologists use specialized ground-penetrating radars to map the composition of Earth's crust . Police forces use radar guns to monitor vehicle speeds on the roads. Automotive radars are used for adaptive cruise control and emergency breaking on vehicles by ignoring stationary roadside objects that could cause incorrect brake application and instead measuring moving objects to prevent collision with other vehicles. As part of Intelligent Transport Systems , fixed-position stopped vehicle detection (SVD) radars are mounted on
16874-402: The processing and consumption of marine and terrestrial foods. Iron slag and boat nails led the archaeologists to surmise that boats were repaired in the sheltered inlet. Four radiocarbon dates from Smoo Cave and Glassknapper's Cave provide evidence for use of these sites between the eighth and 11th centuries AD. In May 1991, the body of a young Viking boy was discovered exposed by the erosion of
17017-472: The prominent headland is exposed to strong winds, building a variety of sand dunes types up to 60 metres (200 ft) above sea level. The cliffs on the eastern side of this headland show the only preserved exposures of Moine metasediments west of the main outcrop of the Moine Thrust in Scotland (as a result of thrusting and later normal-faulting) and excellent machair examples have developed between
17160-466: The prosperity of employment: the Highland economy relied greatly on seasonal migrant workers travelling outside the Gàidhealtachd . In 1863, an observer sympathetic to Gaelic stated that "knowledge of English is indispensable to any poor islander who wishes to learn a trade or to earn his bread beyond the limits of his native Isle". Generally, rather than Gaelic speakers, it was Celtic societies in
17303-416: The purpose of which is unknown. Archaeological investigations in 1995 turned up Neolithic , Norse and Iron Age artifacts in four caves (Smoo Cave, Glassknapper's Cave, Antler Cave and Wetweather Cave) a few hundred meters from Durness. The majority of the artifacts from the cave were related to Viking/Norse or medieval activity . Fish bones, marine shells, plant remains and mammal and bird bones indicated
17446-432: The radial component of the velocity is relevant. When the reflector is moving at right angle to the radar beam, it has no relative velocity. Objects moving parallel to the radar beam produce the maximum Doppler frequency shift. When the transmit frequency ( F T {\displaystyle F_{T}} ) is pulsed, using a pulse repeat frequency of F R {\displaystyle F_{R}} ,
17589-460: The reform and civilisation of the Highlands, which they sought to achieve by teaching English and the Protestant religion. Initially, their teaching was entirely in English, but soon the impracticality of educating Gaelic-speaking children in this way gave rise to a modest concession: in 1723, teachers were allowed to translate English words in the Bible into Gaelic to aid comprehension, but there
17732-587: The region, Gaelic in Scotland was mostly confined to Dál Riata until the eighth century, when it began expanding into Pictish areas north of the Firth of Forth and the Firth of Clyde. During the reign of Caustantín mac Áeda (Constantine II, 900–943), outsiders began to refer to the region as the kingdom of Alba rather than as the kingdom of the Picts. However, though the Pictish language did not disappear suddenly,
17875-414: The response. Given all required funding and development support, the team produced working radar systems in 1935 and began deployment. By 1936, the first five Chain Home (CH) systems were operational and by 1940 stretched across the entire UK including Northern Ireland. Even by standards of the era, CH was crude; instead of broadcasting and receiving from an aimed antenna, CH broadcast a signal floodlighting
18018-410: The resulting frequency spectrum will contain harmonic frequencies above and below F T {\displaystyle F_{T}} with a distance of F R {\displaystyle F_{R}} . As a result, the Doppler measurement is only non-ambiguous if the Doppler frequency shift is less than half of F R {\displaystyle F_{R}} , called
18161-427: The roadside to detect stranded vehicles, obstructions and debris by inverting the automotive radar approach and ignoring moving objects. Smaller radar systems are used to detect human movement . Examples are breathing pattern detection for sleep monitoring and hand and finger gesture detection for computer interaction. Automatic door opening, light activation and intruder sensing are also common. A radar system has
18304-455: The sand dunes at Faraid Head . At Sangobeg beach, a probably Viking settlement and the body of a prehistoric (170 BCE–30 CE) child was discovered in 2000. Durness was formerly a part of the bishopric of Caithness and the old house at Balnakeil was originally the bishop's summer residence. The church at Balnakeil dates back to the Culdean monks but the existing ruined church
18447-407: The scattered energy back toward the source. The extent to which an object reflects or scatters radio waves is called its radar cross-section . The power P r returning to the receiving antenna is given by the equation: where In the common case where the transmitter and the receiver are at the same location, R t = R r and the term R t ² R r ² can be replaced by R , where R
18590-491: The target. If the wavelength is much shorter than the target's size, the wave will bounce off in a way similar to the way light is reflected by a mirror . If the wavelength is much longer than the size of the target, the target may not be visible because of poor reflection. Low-frequency radar technology is dependent on resonances for detection, but not identification, of targets. This is described by Rayleigh scattering , an effect that creates Earth's blue sky and red sunsets. When
18733-475: The technology with the U.S. during the 1940 Tizard Mission . In April 1940, Popular Science showed an example of a radar unit using the Watson-Watt patent in an article on air defence. Also, in late 1941 Popular Mechanics had an article in which a U.S. scientist speculated about the British early warning system on the English east coast and came close to what it was and how it worked. Watson-Watt
18876-879: The transmitter. The reflected radar signals captured by the receiving antenna are usually very weak. They can be strengthened by electronic amplifiers . More sophisticated methods of signal processing are also used in order to recover useful radar signals. The weak absorption of radio waves by the medium through which they pass is what enables radar sets to detect objects at relatively long ranges—ranges at which other electromagnetic wavelengths, such as visible light , infrared light , and ultraviolet light , are too strongly attenuated. Weather phenomena, such as fog, clouds, rain, falling snow, and sleet, that block visible light are usually transparent to radio waves. Certain radio frequencies that are absorbed or scattered by water vapour, raindrops, or atmospheric gases (especially oxygen) are avoided when designing radars, except when their detection
19019-487: The two length scales are comparable, there may be resonances . Early radars used very long wavelengths that were larger than the targets and thus received a vague signal, whereas many modern systems use shorter wavelengths (a few centimetres or less) that can image objects as small as a loaf of bread. Short radio waves reflect from curves and corners in a way similar to glint from a rounded piece of glass. The most reflective targets for short wavelengths have 90° angles between
19162-472: The use of radar altimeters possible in certain cases. The radar signals that are reflected back towards the radar receiver are the desirable ones that make radar detection work. If the object is moving either toward or away from the transmitter, there will be a slight change in the frequency of the radio waves due to the Doppler effect . Radar receivers are usually, but not always, in the same location as
19305-425: The windows and broke down the doors. The constables were all dragged outside and given similar treatment as before, being totally dispersed. The sheriff officers who were in another room were then also dragged outside and dispersed. The locals were later threatened that a military force would be raised against them and did not rise up again. The main sources of employment in the village are crofting and tourism . It
19448-608: Was a 1938 Bell Lab unit on some United Air Lines aircraft. Aircraft can land in fog at airports equipped with radar-assisted ground-controlled approach systems in which the plane's position is observed on precision approach radar screens by operators who thereby give radio landing instructions to the pilot, maintaining the aircraft on a defined approach path to the runway. Military fighter aircraft are usually fitted with air-to-air targeting radars, to detect and target enemy aircraft. In addition, larger specialized military aircraft carry powerful airborne radars to observe air traffic over
19591-399: Was accepted in 2008, and some of its main commitments were: identity (signs, corporate identity); communications (reception, telephone, mailings, public meetings, complaint procedures); publications (PR and media, websites); staffing (language learning, training, recruitment). Following a consultation period, in which the government received many submissions, the majority of which asked that
19734-554: Was long suppressed. The UK government has ratified the European Charter for Regional or Minority Languages in respect of Gaelic. Gaelic, along with Irish and Welsh, is designated under Part III of the Charter, which requires the UK Government to take a range of concrete measures in the fields of education, justice, public administration, broadcasting and culture. It has not received the same degree of official recognition from
19877-510: Was no further permitted use. Other less prominent schools worked in the Highlands at the same time, also teaching in English. This process of anglicisation paused when evangelical preachers arrived in the Highlands, convinced that people should be able to read religious texts in their own language. The first well known translation of the Bible into Scottish Gaelic was made in 1767, when James Stuart of Killin and Dugald Buchanan of Rannoch produced
20020-531: Was quarantined in the loch for months. At cessation of hostilities in 1945 it saw the surrender of some 30 German U-boats. During the Second World War, the RAF built a Chain Home radar station at Sango near Durness. After the war there was also a ROTOR radar station at Faraid Head near Balnakeil, part of which is used by the modern military range and the accommodation area is used for various crafts. In
20163-748: Was sent to the U.S. in 1941 to advise on air defense after Japan's attack on Pearl Harbor . Alfred Lee Loomis organized the secret MIT Radiation Laboratory at Massachusetts Institute of Technology , Cambridge, Massachusetts which developed microwave radar technology in the years 1941–45. Later, in 1943, Page greatly improved radar with the monopulse technique that was used for many years in most radar applications. The war precipitated research to find better resolution, more portability, and more features for radar, including small, lightweight sets to equip night fighters ( aircraft interception radar ) and maritime patrol aircraft ( air-to-surface-vessel radar ), and complementary navigation systems like Oboe used by
20306-460: Was settled in Duirness and Edderachyllius, Sutherland, where still, in 1793, the natives were all, except a few, of the three names of Mac Leay, Morison or Mcleod." Loch Eriboll was used by the battle fleet of King Haakon of Norway on its way south to the disastrous Battle of Largs in 1266. During the Second World War , the battle cruiser "Jamaica" sustained an outbreak of measles on board and
20449-463: Was the first to use radio waves to detect "the presence of distant metallic objects". In 1904, he demonstrated the feasibility of detecting a ship in dense fog, but not its distance from the transmitter. He obtained a patent for his detection device in April 1904 and later a patent for a related amendment for estimating the distance to the ship. He also obtained a British patent on 23 September 1904 for
#495504