text stringlengths 59 1.12k |
|---|
33 were rescued from Technical Specs - Video Codec: XVID - Video Bitrate: 1570 kbps - Video Resolution: 368x672 (height x width) - Video Aspect Ratio: 13x24 (1:1,83) - Audio |
Codec: MPEG-1 Layer 3 (MP3) <0x0055> - Audio BitRate: 192 kbps - Audio Streams: 1 - Audio Languages: English - RunTime Per Part: 58 min 55,76 s (88394 Frames) - |
Number of parts: 5 - TV-cap: NO SUBS - Ripped by: ashinc Release Post Official Website Related Documentaries - Wilderness Explored - Captain's Log - Charting New Zealand's Maritime Heritage |
- World's Toughest Expeditions - 1421 The Year China Discovered America - Around the World in 80 Treasures - Beyond 2000: The New Explorers - Columbus - The Lost Voyage |
- Desperate Crossing - The Untold Story of the Mayflower - Empire: How Britain Made the Modern World - In the Land of the Northern Lights - Journeys to the |
Ends of the Earth - Maps: Power Plunder and Possession - Marco Polo: The China Mystery Revealed - Navigators - Baudin Vs Flinders - Shackletons Antarctic Adventure - The Discoverers |
- The Explorers - A Century of Discovery - The Last Explorers - The Mystery of Champlain - The Silk Road (NG) - The Silk Road (NHK) - The Universe |
With the myriad of options on the market today, it is getting harder and harder to choose the right toothpaste for your dental needs. Toothpaste used to be sold as a one size fits all but with sensitivity, enamel recalcifying, gum issues, dry mouth, or for whitening it has become |
much more customized to each individual. The primary function of toothpaste is to clean teeth and prevent tooth decay. Fluoride is a main ingredient in almost every toothpaste on the market today. Fluoride has the ability to enhance remineralization of the tooth’s enamel which can allow for reversal of very |
small tooth decay. Different Types Of Toothpaste -Whitening. This has become quite popular to the general public. These teeth whitening toothpastes contain hydrogen peroxide, baking soda, or some other custom ingredient. These toothpastes work in a variety of ways to whiten your teeth. Some work through the mechanical action of |
brushing while others work chemically to whiten our teeth. Some are even able to remove staining present on our teeth from our daily eating activities. -Sensitivity. Tooth sensitivity is a very common issue for many of us. Luckily, there are many good sensitivity toothpastes on the market today including crest |
pro health line of toothpastes. Many of these toothpastes contain potassium nitrate. The potassium nitrate is able to plug the holes in our dentin layer of our tooth to form a protective layer, protecting the nerve, thus relieving sensitivity. -Remineralizing. These types of toothpastes allow for tooth enamel to repair |
itself and remineralize. This is only effective in small areas of decay and will not work for very large tooth decay. A good example of this is colgate prevident or GC MI paste with recaldent. -Xylitol. This is a commonly used as a sugar substitute but it also has the |
added properties of not allowing bacteria to adhere to tooth enamel. This gives it the ability to lower a person’s risk for tooth decay. It has also been found that xylitol when combined with fluoride (fluoride concentration greater than 0.8 ppm) it can provide additional remineralization benefits. -SLS free toothpaste. |
SLS or sodium lauryl sulfate is the bubbling agent in toothpaste. For some people, SLS causes irritation to oral tissue, apthous ulcers (canker sores), peeling or red gums. -Mouthrinse in toothpaste. Many toothpastes contain mouth rinse, supposedly to help gums, and give fresher breath. -Fluoride free. Some people prefer natural |
toothpaste without fluoride. -Specialty toothpaste for children. It is important to choose a toothpaste specifically for children because a toothpaste with fluoride when they are too young to swish and spit will be swallowed. The level of fluoride in toothpaste is much higher than in the water supply, fluoride if |
swallowed often, can be harmful. As a child gets older, you can use children’s toothpaste with fluoride, but only a pea size amount. With the multitude of toothpaste choices comes the responsibility of choosing the right toothpaste for you and your family. It is important to use the toothpaste that |
suits your needs. Brush at least twice a day to stave off tooth decay as well periodontal disease. Luckily, for dentists and patient, with all these choices a toothpaste can be custom selected for each individuals needs. |
AMERICAN WHIGS (IN U. S. HISTORY), the first American political party. Of the two English parties during the years 176-5, the tories upheld the principle of passive obedience to the |
crown, while the whigs aimed to "fight up against the king and against the people." Neither pretended to uphold "the people" as a political force. When George II., abandoning the |
direct assertion of royal prerogative, but still aiming to exert it indirectly through a purchased parliament as his instrument, attempted to ignore or subvert the legislative bodies in America, those |
Americans who had the political wisdom to see that they were contending against the king under the mask of parliament naturally preferred the name of American whigs. Its first appearance |
seems to have been in New York city in 1768. When the king declared his American subjects out of his allegiance, and they consequently declared their independence of him, the |
name whig became synonymous with that of patriot, while that of tory was given to the American supporters of the crown. After the peace the whigs, having banished the most |
prominent tories, and confiscated their estates, remained the only party in America until the question of a closer union divided Americans into federalists and anti-federalists. (See DECLARATION OF INDEPENDENCE, ANTI-FEDERAL |
Endocrine Disrupting Chemicals, EDC’s, include Bisphenol-A (BPA), PCB’s, phthalates and agricultural pesticides that are in everyday items such as plastic water bottles, shower curtains, beauty products (including nail polish, hair spray, shampoo, deodorants, and fragrances), vinyl floor coverings, and more. The joint study highlights a range of health problems associated with EDC’s including breast cancer in women; developmental effects on |
the nervous system in children and attention deficit hyperactivity in children. Theo Colborn, Ph.D., President of the Endocrine Disruption Exchange talks about chemicals, parents and dreams of the future for our children. Theo asks ‘Where are parents going to get information to help understand the myriad of factors in the environment and the effect on their children’. ‘Growing Greener Children’is |
such a resource for parents. Mark Bittman’s article on cosmetics testing in The New York Times highlights the fact that personal care product makers don’t have to prove that the ingredients in their shampoos, toothpastes or other cosmetics are safe before you use them. The Environmental Working Group (E.W.G.) offers a database of more than 79,000 personal care products, from |
soap to lip plumper ranked by level of hazard. The database is an excellent way to find out what is in you and your children’s products. In Australia the Green Party have created a new poll to understand parents perspectives on early childhood education and care. The Green Party has said it’s time to hear what parents thought about childcare. |
ways. Information now appears with a click. Overseas friends are part of our daily lives. And even grandma loves Wii. But what are we missing when we are behind screens? And how will this impact our children, our society, and eventually, our planet? At a time when children play more behind screens than outside, PLAY AGAIN explores the changing balance |
between the virtual and natural worlds. Is our connection to nature disappearing down the digital rabbit hole? This moving and humorous documentary follows six teenagers who, like the “average American child,” spend five to fifteen hours a day behind screens. PLAY AGAIN unplugs these teens and takes them on their first wilderness adventure – no electricity, no cell phone coverage, |
no virtual reality. Through the voices of children and leading experts including journalist Richard Louv, sociologist Juliet Schor, environmental writer Bill McKibben, educators Diane Levin and Nancy Carlsson-Paige, neuroscientist Gary Small, parks advocate Charles Jordan, and geneticist David Suzuki, PLAY AGAIN investigates the consequences of a childhood removed from nature and encourages action for a sustainable future.’ Is Western education |
superior? We have an institution globally that is branding millions and millions of innocent people as failures. They are the in-between people and they are falling through the cracks of an in-between world. We have moved from wisdom to knowledge and now we are moving from knowledge to information. We have moved from wisdom to knowledge and now we are |
moving from knowledge to information. Schooling the World: The White Man’s Last Burden is set in Ladakh and examines the long-unquestioned assumption that the western model of education and schooling improves lives wherever it goes. “For the child…it is not half so important to know as to feel. If facts are the seeds that later produce knowledge and wisdom, then |
the emotions and the impressions of the senses are the fertile soil in which the seeds must grow…. It is more important to pave the way for a child to want to know than to put him on a diet of facts that he is not ready to assimilate.” “First and foremost, our job as heart-centered educators must be to |
understand the potential of each ‘seed’ we are nurturing. The great Spanish cellist Pablo Casals said it well: ‘The child must know that he (or she) is a miracle, that since the beginning of the world there hasn’t been, and until the end of the world there will not be, another child like him (or her).’ Supporting the miracle of |
each child’s uniqueness does not lend itself to standardization. It is not ‘convenient.’ It may seem easier to find a one-size-fits-all way of delivering and assessing learning, but if we pay attention, the natural world will help us realize the futility of trying to do so. Nothing in nature, including human beings, can be completely ‘standardized.’ (1) We need to |
advocate for an education based on the understanding of our children’s uniqueness. This is a fundamental right of every child. A beautiful and powerful song about identity and connection to country from Shellie Morris and the Yanyuwa Borroloola Song Women. Singing Yanyuwa Identity – Shellie Morris, the Yanyuwa Songwomen and the Gondwana National Indigenous Children’s Choir perform ‘li-Anthawirriyarra’ at the |
Sydney Opera House for the DEADLY AWARDS 2011. This chorus is a traditional/contemporary collaboration born from saltwater people their Yanyuwa identity and connection to the country. It involves the traditional singers, Shellie Morris and children from Borroloola . Waliwaliyangu li-Anthawirriyarra li-Yanyuwa Calling from island to island. A must watch segment on ABC TV’s Catalyst program on plastic waste and our |
environment. Oceans are silently choking on our plastic waste. Plastic and synthetic materials are the most common types of debris in our oceans and are having horrific impacts on marine wildlife and systems. As an island continent ‘girt by sea’ marine debris is of particular importance for Australia. Creatures get entangled in plastics and drown and ingested concentrated toxins from |
plastics pose a threat to the health of the food chain. Plastics also transport and introduce species into new environments. Anja Taylor catches up with the CSIRO research team spearheading the Marine Debris Survey, a world-first study of the plastics around our coastline. |
Ti AM33XX PRUSSv2 The PRUSS (Programmable Real-time Unit Sub System) consists of two 32-bit 200MHz real-time cores, each with 8KB of program memory and direct access to general I/O. These cores are connected to various data memories, peripheral modules and |
an interrupt controller for access to the entire system-on-a-chip via a 32-bit interconnect bus. PRUs are programmed in Assembly, with most commands executing in a single cycle with no caching or pipe-lining, allowing for 100% predictable timings. At 200Mhz, a |
single cycle will always take 5ns (nanoseconds) to execute. This is a Work In Progress Available PRU Resources - 8KB program memory - Memory used to store instructions and static data AKA Instruction Memory (IRAM). This is the memory in |
which PRU programs are loaded. - Enhanced GPIO (EGPIO) - High-speed direct access to 16 general purpose output and 17 general purpose input pins for each PRU. - pr1_pru_0_pru_r30[15:0] (PRU0 Register R30 Outputs) - pr1_pru_0_pru_r31[16:0] (PRU0 Register R31 Inputs) - |
pr1_pru_1_pru_r30[15:0] (PRU1 Register R30 Outputs) - pr1_pru_1_pru_r31[16:0] (PRU1 Register R31 Inputs) - Hardware capture modes - Serial 28-bit shift in and out. - Parallel 16-bit capture on clock. - MII standardised capture mode, used for implementing media independent Fast Ethernet |
(100Mbps - 25MHz 4-bit). - A 32-bit multiply and accumulate unit (MAC) - Enables single-cycle integer multiplications with a 64-bit overflow (useful for decimal results). - 8KB data memory - Memory used to store dynamic data. Is accessed over the |
32-bit bus and so not single-cycle. - One PRU may access the memory of another for passing information but it is recommend to use scratch pad or shared memory, see below. - Open Core Protocol (OCP) master port - Access |
to the data bus that interconnects all peripherals on the SoC, including the ARM Cortex-A8, used for data transfer directly to and from the PRU in Level 3 (L3) memory space. - Scratch pad - 3 banks of 30 32-bit |
registers (total 90 32-bit registers). - Single-cycle access, can be accessed from either PRU for data sharing and signalling or for individual use. - 12KB data memory - Accessed over the 32-but bus, not single-cycle. Local peripherals are those present |
within the PRUSS and not those belonging to the entire SoC. Peripherals are accessed from PRUs over the Switched Central Resource (SCR) 32-bit bus within the PRUSS. Attached to the SCR bus is also an OCP slave, enabling OCP masters |
from outside of the PRUSS to access these local peripherals in Level 4 (L4) memory space. - Enhanced Capture Model (eCAP) - Industrial Ethernet Peripheral (IEP) - Universal Asynchronous Receiver/Transmitter (UART0) - Used to perform serial data transmission to the |
TL16C550 industry standard. - 16-bit FIFO receive and transmit buffers + per byte error status. - Can generate Interrupt requests for the PRUSS Interrupt Controller. - Can generate DMA requests for the EDMA SoC DMA controller. - Maximum transmission speed |
of 192MHz (192Mbps - 24MB/s). Communication between various elements of the PRUSS or the wider SoC may take place either directly, over a bus, via interrupts or via DMA. The following lists will expose all possible communication approaches for each |
likely scenario. For communication via interrupts, please first read the section on the PRUSSv2 Interrupt Controller. PRU to Host (PRU to ARM Cortex-A8) Host to PRU (ARM Cortex-A8 to PRU) Each PRU has access to host interrupt channels Host-0 and |
Host-1 through register R31 bit 30 and bit 31 respectively. By probing these registers, a PRU can determine if an interrupt is currently present on each host channel. PRU to external peripherals External peripherals to PRU PRU to internal peripherals |
Worker Safety in a Power Outage Preventing Electrocutions by Undetected Feedback Electrical Energy During power outages, many people use portable electrical generators. If the portable generator is improperly sized, installed, or operated, it can send power back to the electrical lines. This problem is called backfeed or feedback in the electrical energy in power lines. Backfeed can seriously injure or |
kill repair workers or people in neighboring buildings. This fact sheet provides workers with information on how to restore power safely to local communities when a portable generator is being used in a home or homes in the area. Effects of Backfeed The problem of backfeed in electrical energy is a constant risk for electrical energy workers. Electrocutions are the |
fifth leading cause of all reported occupational deaths. Understanding the Process When power lines are down, residents can restore energy to their homes by another power source such as a portable generator. If the generator is plugged into a household circuit, the electrical current could reverse, go back through the circuit to the power grid, and then increase in voltage. |
If a worker attempts to repair power lines when this happens, the worker could be electrocuted. Following certain safety guidelines can reduce this risk. Safeguards against Backfeed - Workers should treat all power lines as “hot” unless the lines have been de-energized and grounded. Because of the possibility of a feedback circuit, the worker should ground all lines on both |
sides of the work area unless he/she is wearing the proper personal protective equipment. - Prevent electrocutions by conducting standard tests to decide if there is high voltage in the power lines . Low voltage includes voltages from 50 to 600 volts. High voltage includes voltages of 601 volts to 230,000. Extra high voltage is any voltage over 230,000 volts. |
- Workers should also use low voltage testing equipment such as glowing a neon light or light-emitting diode type equipment to determine whether there is low voltage present. High voltage tests may not identify lower voltage levels. Lower voltages are also deadly. - Power lines should not be repaired or otherwise accessed without adequate personal protective equipment such as NEC |
rated and approved gloves and sleeves. How the Public Can Help - Have a trained, qualified electrician install a portable generator. - Be sure that the main circuit breaker is OFF and locked out prior to starting the generator. This will help protect utility workers from possible electrocution. - Electrical Safety and Generators Preventing electrocutions associated with generators plugged Into |
household circuits... - Page last updated August 18, 2004 - Content source: National Center for Environmental Health (NCEH)/Agency for Toxic Substances and Disease Registry (ATSDR), National Center for Injury Prevention and Control (NCIPC) Get email updates To receive email updates about this page, enter your email address: - Centers for Disease Control and Prevention 1600 Clifton Rd Atlanta, GA 30333 |
An aisleless church (German: Saalkirche) is a single-nave church building that consists of a single hall-like room. While similar to the hall church, the aisleless church lacks aisles or passageways either side of the nave separated from the nave by colonnades or arcades, a row of pillars or columns. However, |
there is often no clear demarcation between the different building forms, and many churches, in the course of their construction history, developed from a combination of different types. Early aisleless churches were generally small because of the difficulty of spanning a large, open space without using pillars or columns. In |
many places, where the population made it necessary and money was available, former medieval hall churches were extended over the course of centuries until they became a hall church or basilica. Starting in the Renaissance, the development of new technologies and better building materials allowed larger spaces to be spanned. |
The basic form of the church hall is rectangular. Aisleless churches are generally aligned longitudinally so that the altar and choir are located at one of the narrower ends and are facing east. There are rare examples of transept aisleless churches, in which the altar area occupies the short side |
east of the transept. This form of church building has proliferated since the Renaissance, especially in Protestant churches. It became the basis of modern church architecture. - Church of the Redeemer near Potsdam - Church of St. Lambert's in Bergen - Christuskirche in Dresden-Strehlen, Art Nouveau-style church - The Hofkirche |
at Ludwigslust - The largest aisleless church in Germany is the parish church of St. Vitus in Löningen. - The Saalkirche in the northern Siebengebirge region - The Providenzkirche in Heidelberg - The Jakobikirche in Hildesheim. - The Seminarkirche in Hildesheim. - The Johanniskirche in Frankfurt-Bornheim a Baroque aisleless church. |
The Omo remains are a collection of hominid bones discovered between 1967 and 1974 at the Omo Kibish sites near the Omo River, in Omo National Park in south-western Ethiopia. The bones were recovered by a scientific team from the Kenya National Museums directed by Richard Leakey and others. The remains from Kamoya's Hominid Site (KHS) were called Omo 1 and those from Paul's |
Hominid Site (PHS) Omo 2. Parts of the fossils are the earliest to have been classified by Richard Leakey as Homo sapiens. In 2004, the geologic layers around the fossils were dated, and the authors of the dating study concluded that the "preferred estimate of the age of the Kibish hominids is 195 ± 5 ka [thousand years ago]", which would make the fossils |
the oldest known Homo sapiens remains. In a 2005 article on the Omo remains, Nature magazine said that, because of the fossils' age, Ethiopia is the current choice for the "cradle of Homo sapiens". The bones includes two partial skulls, four jaws, a legbone, around two hundred teeth and several other parts. The two specimens, Omo I and Omo II, differ in morphological traits. |
The Omo II fossils indicate more archaic traits. Studies of the postcranial remains of Omo I indicate an overall modern human morphology with some primitive features. The fossils were found in a layer of tuff, between a lower, older geologic layer dubbed Member I and a higher, newer layer dubbed Member III. The Omo I and Omo II hominid fossils are from similar stratigraphic |
levels over Member I. Because very limited fauna and few stone artefacts were found at the sites when the original Omo remains were discovered, "the reliability of the dates and the provenance of the Kibish hominids" was "repeatedly questioned." Dating and implications About 30 years after the original finds, a detailed stratigraphic analysis of the area surrounding the fossils was carried out. This analysis |
argon-dated the Member I layer to 195,000 years ago and that of Member III to 105,000 years ago. The numerous new lithic records from Members I and III verify tool technology to the Middle Stone Age. The lower layer (below the fossils) is considerably older than the 160,000-year-old Herto remains designated Homo sapiens idaltu, which were previously thought to have been the earliest humans. |
This suggests that, if humans did originate in Africa as is the current hypothesis, then they did not extend beyond there until much later than was previously thought. The rainy conditions at that time, which are known from isotopic ages on the Kibish Formation corresponding to the ages of Mediterranean sapropels, suggest increased flow of the Nile River and, therefore, increased flow of the |
2011-08-27] - Fleagle, Jg; Assefa, Z; Brown, Fh; Shea, Jj (Sep 2008). "Paleoanthropology of the Kibish Formation, southern Ethiopia: Introduction". Journal of Human Evolution 55 (3): 360–365. doi:10.1016/j.jhevol.2008.05.007. ISSN 0047-2484. PMID 18617219. - Mcdougall, Ian; Brown, FH; Fleagle, JG (2005). "Stratigraphic placement and age of modern humans from Kibish, Ethiopia". Nature 433 (7027): 733–736. Bibcode:2005Natur.433..733M. doi:10.1038/nature03258. PMID 15716951. - Hopkin, Michael (2005-02-16). "Ethiopia is |
top choice for cradle of Homo sapiens". Nature News. doi:10.1038/news050214-10. - Ian McDougall, Francis H Brown, John G Fleagle Sapropels and the age of hominins Omo I and II, Kibish, Ethiopia. Journal of Human Evolution (2008) Volume: 55, Issue: 3, Pages: 409-20PubMed: 18602675 Copyright © 2012 Mendeley Ltd. All rights reserved. doi:10.1016/j.jhevol.2008.05.012 [Retrieved 2012-01-02] - Pearson, Om; Fleagle, Jg; Grine, Fe; Royer, Df (Sep |
2008). "Further new hominin fossils from the Kibish Formation, southwestern Ethiopia". Journal of Human Evolution 55 (3): 444–7. doi:10.1016/j.jhevol.2008.05.013. ISSN 0047-2484. PMID 18691739. - Vaks, Anton; Bar-Matthews, Miryam; Ayalon, Avner; Matthews, Alan; Halicz, Ludwik; Frumkin, Amos (2007). "Desert speleothems reveal climatic window for African exodus of early modern humans". Geology 35: 831. doi:10.1130/G23794A.1. |
carried. The community development programme which was launched in 1952 in Himachal, in certain selected areas was later extended to the entire rural Himachal. In Mandi and Kangra, package programmes were undertaken in collaboration with the West Germany for popularising modern techniques of cultivation among the farmers. Suitable agricultural machinery and animal husbandary were introduced in these areas. Well equipped soil testing laboratories, dairy |
farms and agricultural workshops were set up at various centres, besides an Agriculture University at Palampur. Himachal is one of those states in India which was rapidly transformed from the most backward part of the country to one of most advanced states. At present Himachal ranks fourth in respect of per capita income among the states of the Indian Union. Himachal education system is |
well established, its agriculture is enough for its self-sufficiency, its horticulture is highly impressive in the country and even in abroad, its road connectivity system has emerged as the best in the mountainous areas in India, the infrastructure for its industrial development are well laid out, its rich forest resources being augmented and above all, the increasing attention of the nation towards the exploitation |
of its hydel resources are the signs for its bright future. It has already become the ideal in respect of development for the hill areas of the country. Agriculture contributes nearly about 45% to the net state domestic product. It is the main source of income as well as employment in Himachal. About 93% of the state population depend directly upon agriculture.The main cereals |
grown in the state are wheat, maize, rice and barley. Kangra, Mandi and Paonta valley of Sirmaur district (to some extent) are the major producers of the first three cereals, while barley is mostly cultivated in Shimla. Fruit cultivation has also proved to be an economic boon to the state. There are huge tracts of land suitable only for growing fruits. Fruit of all |
cultivation does not add to the problem of soil erosion and its employment potential is more than the conventional farming. The yield per acre in terms of income is also much higher. Apple produces the maximum income. Fruit growing in the state is fetching over Rs.300 crore annually. Special efforts are being made to promote cultivation of crops like olives, figs, hops, mushrooms, flowers, |
pistachio nuts, sarda melon and saffron. The state has also earned the name of the Apple State of India. Ecology has been given importance in the state during the last few years. Industries becoming the cause of water or air pollution are not encouraged. Every industrial project has to be passed by the clearance of the Environment Protection Organization before its establishment. Himachal is |
facing a number of difficulties in the advancement of industries. Lack of means of dependable transport and poor accessibility was one of the major drawbacks. Other problems faced by the state were the poor mineral resources, non-availability of infrastructure and communication facilities, shortage of capital and lack of modern skills. The only plus point of the state was the ample availability of electricity. Parwano, |
Barotiwala, Baddi, Paonta Sahib, Mehatpur, Shamshi, Nagrotu Bagwan, Bilaspur, Reckong Peo and Sansar Pur Tera are some of the industrial areas of the state at present. As the dust free climate of Himachal is extremely suitable for the setting up of electronic industries, many electronic complexes have been established at Solan, Mandi, Hamirpur, Shogi, Raga-Ka-Bagh, Chamba, Ambi, Taliwala and Keylong. Moving one step further |
Hydroacoustics is a general term for the study and application of sound in water. The term comes from Greek υδρο, water, and ακουστική, acoustics. Hydroacoustics, utilizing SONAR technology, is most commonly used for detection, assessment, and monitoring of underwater physical |
and biological characteristics. Hydroacoustics can be utilized to detect the depth of a water body (bathymetry), as well as the presence or absence, abundance, distribution, size, and behavior of underwater plants and animals. Hydroacoustic sensing involves "passive acoustics" (listening for |
sounds) or active acoustics making a sound and listening for the echo, hence the common name for the device, echo sounder or echosounder. There are a number of different causes of noise from shipping. These can be subdivided into those |
caused by the propeller, those caused by machinery, and those caused by the movement of the hull through the water. The relative importance of these three different categories will depend, amongst other things, on the ship type One of the |
main causes of hydro acoustic noise from fully submerged lifting surfaces is the unsteady separated turbulent flow near the surface's trailing edge that produces pressure fluctuations on the surface and unsteady oscillatory flow in the near wake.The relative motion between |
the surface and the ocean creates a turbulent boundary layer (TBL) that surrounds the surface. The noise is generated by the fluctuating velocity and pressure fields within this TBL. - Surveillance Towed Array Sensor System - Fisheries Acoustics - Acoustic |
Doppler Current Profiler for water speed measurement - Acoustic Camera - Passive Acoustic Monitoring Related Publications - Quality assurance of hydroacoustic surveys: the repeatability of fish-abundance and biomass estimates in lakes within and between hydroacoustic systems (free link to document) |
- Hydroacoustics as a tool for assessing fish biomass and size distribution associated with discrete shallow water estuarine habitats in Louisiana - Acoustic assessment of squid stocks - Summary of the use of hydroacoustics for quantifying the escapement of adult |
salmonids (Oncorhynchus and Salmo spp.) in rivers. Ransom, B.H., S.V. Johnston, and T.W. Steig. 1998. Presented at International Symposium and Workshop on Management and Ecology of River Fisheries, University of Hull, England, 30 March-3 April 1998 - Multi-frequency acoustic assessment |
of fisheries and plankton resources. Torkelson,T.C., T.C. Austin, and P.H. Weibe. 1998. Presented at the 135th Meeting of the Acoustical Society of America and the 16th Meeting of the International Congress of Acoustics, Seattle, Washington. - Acoustics Unpacked A great |
reference for freshwater hydroacoustics for resource assessment - Inter-Calibration of Scientific Echosounders in the Great Lakes - Hydroacoustic Evaluation of Spawning Red Hind Aggregations Along the Coast of Puerto Rico in 2002 and 2003 - Feasibility Assessment of Split-Beam Hydroacoustic |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.