Saliency-Based Best Diver Gifts Target Detection And Localization Method

by Mindy

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Posted on 11-08-2020 01:54 AM

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In this paper, we propose a diver detection method based on the saliency of sonar images. On the basis of studying the characteristics of diver sonar images, we employ saliency detection techniques based on frequency analysis to segment the acoustic highlight region from its surroundings, which can adapt to diverse postures and motion directions of the diver target in sonar images. We find that decomposition and median filtering on the original sonar image before conducting saliency detection can significantly improve the effect of the saliency map. Extracting the acoustic shadow region in generated roi can reduce the interference of background and improve the localization accuracy. The experimental results show that the method can effectively detect the a gift for a diver diver mug gifts best gift for a friend diver target with diverse postures and motion directions in sonar images and can meet real-time application requirement.

Passive deep sea diver gifts diver coffee mug gift for a diver detection relies on the detection of sounds emitted by underwater breathing apparatus. It is limited by the ambient noise. Passive detection and localization of scuba divers in a port environment up to 400 m has been reported. The applicability of these methods to warm waters has not been demonstrated yet. Indeed, warm waters are noisy waters whose background noise is usually dominated by the noise produced by the marine life, in particular by snapping shrimps that generate very loud transients. In this study, we report the first investigation of the detectability of scuba gifts for a diver mug diver a gift for a diver s in warm waters using passive acoustics. The study was performed using data collected using the romanis system. Romanis is a 2d array of 1. 3 m meter diameter equipped with 508 sensors and developed at the national university of singapore for ambient noise imaging. The data analysed were collected in april 2010 while scuba divers were deploying a target for imaging at 70 m from the array. The data analysed presents significant level of snapping shrimp noise (more than 200 snaps per second). It was analysed using beamforming. The large number of sensors on the array allows for processing of the data using a subset of sensors, thereby enabling to study the influence of the number of sensors. The beamformed data enabled detection of the scuba diver’s inhalations and to determine their azimuth and elevation. The study indicates that passive diver detection is applicable in warm waters dominated by snapping shrimp noise.

GUARDPOINT DIVER DETECTION SONAR SYSTEM

Guardpoint promises a variety of sonar systems in regards with the operational requirements in maritime security and maritime domain awareness. Guardpoint & mobileguard: fixed and portable diver detection sonar systems which provides detection, tracking and classification of underwater intruders. Subguard: anti submarine warfare sonar system which provides detection of submarines underwater. Guardpoint and mobileguard diver detection sonars are high-end equipment designed to detect, track and classify divers automatically with minimum operator intervention even in tough underwater environment.

Diver detection sonar (dds) systems are sonar and acoustic location systems employed underwater for the detection of divers and submerged swimmer delivery vehicles (sdvs). The purpose of this type of sonar system is to provide detection, tracking and classification information on underwater threats that could endanger property and lives. Further, this information is useful only to the extent that it is made available to authorities in time to make possible the desired response to the threat, be it deterrent or defensive action. Subsurface threats are a difficult problem, because reliable detection is available to date chiefly by use of high-resolution active sonar or trained dolphins or sea lions. The threat of an underwater terrorist attack is a concern to the maritime industry and port law enforcement agencies. Ports face a range of threats from swimmers, boat-delivered ordnance such as limpet mines and other forms of improvised underwater explosive devices. Dds systems have been developed to provide underwater security for ports, coastal facilities, offshore installations, pipelines and ships. Due to the variety of life and objects that exist under the water, it is desirable that a dds system be capable of distinguishing between large sea mammals, shoals of fish; a ship's wake; a diver with an open circuit scuba set and a stealth diver with a rebreather.

Diver detection sonar systems are designed to automatically detect and track underwater and surface threats.

The aquashield™ dds – diver detection sonar supports long range of detection for all types of underwater threats including divers using rebreathing apparatus, scuba divers and unmanned underwater vehicles (uuvs). The aquashield™ architecture is modular to allow maximum flexibility in its deployment and installation. The system offers three sector coverage configurations: 120⁰, 240⁰ and 360⁰. All configurations cover the entire relevant water column.

A diver is an underwater swimmer who carries a self contained underwater breathing apparatus (scuba) system and can stay underwater for a long time. Because of the presence of water,  people ashore find it difficult to find, to search for, and to communicate with divers. In addition, when a diver is in danger, the probability of misfortune is high, even with the help of rescuers. There are active and passive sonar system for underwater detection. In shallow water, the active sonar system faces the challenge of reverberation, and the performance requirements of small targets are high. Compared with the active mode, passive sonar has small energy consumption, is cheaper and more hidden, and is being pursued as an alternative [ 1 ].

Aquashieldâ„¢ is a high-performance diver detection sonar (dds) system, which is used for long-lasting underwater protection in naval bases, docks, oil and gas depots, offshore platforms, underwater pipelines and cables, nuclear energy facilities, and canals. The aquashieldâ„¢ dds provides long-range recognition for many marine threats, including divers using rebreathing devices, scuba divers, and unmanned underwater vehicles (uuvs).

Underwater Port Security System

The base system, sentinel, is configured to meet the needs of commercial and infrastructure facility protection projects. It can be used as a standalone security sensor or integrated with third party command and control (c2) security systems. Support for networked sonar is also offered, meaning that entire waterfronts can be protected using a single operator station.

The threats to offshore and coastal critical infrastructure have produced a need for sophisticated underwater surveillance solutions. Designed with a single purpose in mind – superior performance – dsit’s fixed and portable systems provide the most advanced underwater security solutions available. Our solutions are tailored for port security, energy terminal protection, platform security, ship protection and harbor surveillance. Our comprehensive line of underwater security products covers the entire spectrum of surveillance, from the very long range detection of submarines up to close monitoring of close circuit divers.

"the importance of protecting our ports, waterways, ships and bridges from underwater security threats has never been greater, and these advances in technology will address this need — providing powerful, user-friendly software that will continue to be upgraded for operation on our world-leading system technology," said phil andrew, manager of underwater security for kongsberg mesotech, based in port coquitlam, british columbia.

As the size and complexity of large yachts has evolved, so has the level of sophistication of their security systems. Simply having door locks and a few cameras is no longer suitable for today’s largest super-yachts. Common security equipment includes: thermal and night vision cameras, motion sensors, deck pressure sensors, rfid based access controls, and high resolution radars. Farsounder’s ship protection system adds underwater surveillance to the suite of sensors available to a yacht’s security team. Such a large variety of data sources can easily overwhelm crew. In such cases, a well thought-out, integrated security solution is required.

Diver detection sonar (dds) systems are sonar and acoustic location systems employed underwater for the detection of divers and submerged swimmer delivery vehicles (sdvs). The purpose of this type of sonar system is to provide detection, tracking and classification information on underwater threats that could endanger property and lives. Further, this information is useful only to the extent that it is made available to authorities in time to make possible the desired response to the threat, be it deterrent or defensive action. Subsurface threats are a difficult problem, because reliable detection is available to date chiefly by use of high-resolution active sonar or trained dolphins or sea lions. The threat of an underwater terrorist attack is a concern to the maritime industry and port law enforcement agencies. Ports face a range of threats from swimmers, boat-delivered ordnance such as limpet mines and other forms of improvised underwater explosive devices. Dds systems have been developed to provide underwater security for ports, coastal facilities, offshore installations, pipelines and ships. Due to the variety of life and objects that exist under the water, it is desirable that a dds system be capable of distinguishing between large sea mammals, shoals of fish; a ship's wake; a diver with an open circuit scuba set and a stealth diver with a rebreather. Dds systems have been developed that can be mounted on the seabed , on a pier or on the hull of a vessel. For complete port security these systems are integrated with the surface surveillance and security systems employed at ports, coastal facilities and offshore installations. Various systems provide specialized features to facilitate their use in port security systems including automatic detection features.

March 26, 2009 - prlog -- the contract also includes the provision of the new sonardyne underwater loudhailer called ‘scylla’. This option for a sentinel system allows users to broadcast underwater warning messages to deter submerged intruders once they have been detected. With support from nato, the slovenian navy evaluated numerous diver detection technologies last summer (2008). During the trials, slovenian navy divers attempted to evade or deceive the ‘invisible’.

Ship Protection System [ edit ]

Ship protection system[ edit ] the ship protection system or sps is a ship-based underwater threat detection system manufactured by farsounder, inc. Based on farsounder's 3d forward looking sonar, their sps offers 360° coverage of underwater threats to vessels at anchor or at dock. This is a commercial product suitable for mega yachts.

By john haystead, contributing editor the applied physics laboratory (apl) of the university of washington (seattle, wa) has developed a hand-held sonar (sound navigation and ranging) system that can detect and identify objects underwater despite near-zero visibility. Sponsored by the us navy office of special technology and managed by the naval explosive ordnance disposal technology division, the limpet mine-imaging sonar (limis) system is intended to help navy divers find "limpet" mines attached to the hulls of ships and to locate other explosives on the sea bottom.

Download our white paper sps for the ship operator: diver detection sonar explained to read more about what to consider when selecting an underwater security system. Our engineers are always happy to evaluate your diver detection needs and recommend possible solutions. Don't hesitate to contact us with your project's requirements. Our ship protection system is designed to provide real time navigation capabilities while underway and underwater threat detection while on anchor.

When underway, the bow sensor switches to navigation mode. The ship protection system's 3d forward looking sonar capabilities match the argos 1000. Only farsounder's ship protection systems offer security at anchor and underway with a single integrated system.

Accomplished – fulfils multiple naval roles, including minesweeping, mine hunting, mine disposal, asw, surveillance, force protection, diver support. Deployable – with portable containerised systems, arcims can be deployed rapidly by sea, air and road. Intelligent –can be operated remotely, autonomously or as a manned vessel. Adaptable – engineered versatility, allowing a stand- alone mission system or fully integrated with a mother ship.

Sentinel is commercial-off-the-shelf (cots) underwater security technology that is now in service with several navies around the world. Two ship-fit sentinels have now been tested and delivered with more to follow, as part of a wider contract to equip each opv with a fully integrated force-protection capability. Working with marss group’s nidar long range maritime surveillance system, the sentinels will provide complete underwater domain awareness by detecting unauthorised divers and subsurface vehicles approaching the opvs and the assets they protect.

Sentinel IDS Diver Detection Sonar System

The wg diver detection sonar system is a single-or multi-head active sonar system designed to automatically detect and track underwater and surface threats, principally divers (scuba or closed-circuit, with or without propulsion aids), surface swimmers and un-manned underwater vehicles. The system will track simultaneously multiple targets up to a range of 900 metres in ideal conditions, with classification of targets such as divers, the system will also provide upon classification the targets previous trail.

September 30, 2010 photo courtesy paul eastaugh pems marine & offshore pr a sonardyne sentinel diver detection sonar is to be supplied as part of an integrated security package for one of the world’s largest megayachts currently under construction in a european shipyard. Sonardyne is working with marineguard systems ltd, the yacht’s security systems integrator, to provide a sentinel intruder detection sonar and an electro-hydraulic through-hull deployment system. This will consist of gate valves, extension tubes, coffer dam and associated ancillaries and will enable the immediate automatic deployment and recovery of the sentinel sonar array. The installation will be an application of a sonar solution developed by sonardyne for all types of superyacht and includes through-hull, over-the-side and seabed frame deployment.

The system has been deployed to protect the platform against the threat of attack from underwater intruders. Sentinel is the world’s most widely deployed intruder detection sonar, developed to meet the underwater security requirements of private, commercial, government and naval end users. The system reliably detects, tracks and classifies divers and small underwater vehicles approaching a protected asset from any direction and alerts security personnel to the potential threat. Whether it is protecting a critical infrastructure facility, offshore platform, sea port or superyacht at anchor, sentinel’s autonomous monitoring capabilities, long range detection and proven low false alarm rates provide a rapidly deployable, 360° underwater security solution for any application.

Diver Detection Sonar Systems

The indian navy will be further enhancing its underwater surveillance capabilities in low intensity maritime operations with the induction of the portable diver detection sonar (pdds). The navy said it has concluded a contract with tata power strategic engineering division for supply of pdds under the ‘buy and make (indian)’ category.

Kongsberg maritime as, sensor & robotics is celebrating the signing of a contract with saab that will see kongsberg delivering its market-leading anti-submarine warfare (asw) and diver detection sonars for the pohjanmaa-class corvettes currently being developed by the finnish navy under its squadron 2020 project. 15 apr 2020 under the terms of the contract, which equates to approximately 100mnok, kongsberg will equip the vessels with its ss2030 and sd9500 sonars, both of which boast acoustic properties which make them ideally suited for deployment in shallow-water environments.

Take control of your underwater domain with sentinel, rapidly deployed diver detection sonar that you can protect your vessel, waterside facility or offshore platform from the threat of attack.

09:16 am, april 15, 2020 1089 saab has selected kongsberg to provide anti-submarine warfare (asw) and diver detection sonars for the finnish navy’s pohjanmaa-class corvettes. “kongsberg maritime as, sensor & robotics is celebrating the signing of a contract with saab that will see kongsberg delivering its market-leading anti-submarine warfare (asw) and diver detection sonars for the pohjanmaa-class corvettes currently being developed by the finnish navy under its squadron 2020 project,” the company said in a statement on april 15.

Dsit’s aquashield™ is a diver detection sonar (dds) that protects ports, naval bases, energy terminals and offshore platforms against underwater intrusion from divers of any type and from divers on swimmer delivery vehicles under the water. Dsit’s aquashield dds is a high-performance system with the best available ranges of detection and classification. It is also designed for maximum flexibility with three configuration models available, depending on the geography of the site to be protected: 120°, 240° or 360°.

Kongsberg to supply finnish navy corvettes with anti-submarine warfare and diver detection sonars the ss2030, principally devised for asw operations and capable of detecting torpedoes or other small objects in the water column, is an active hull-mounted sonar which utilises sophisticated tracking algorithms. Its electronically-stabilised transmitting and receiving beams can be tilted to adjust to challenging sound speed profiles, with its integrated sound propagation model determining the optimal tilt settings and enhancing the probability of detection (pod) ratio. The ss2030 sonars will be delivered to the finnish navy complete with hoist-able hull units and ice protection to ensure safe and efficient operation in the often harsh conditions of the baltic sea.

Diver Detection Sonar – AquaShield™ DDS

Performance: provides world-class diver detection performance; the universal dds benchmark. Reliability: cerberus is deployed globally with many customers, providing 24/7 protection to their infrastructure and assets for years on end with only routine maintenance. Portability: cerberus is the lightest, most compact system on the market; sonar head, cable and operator work station all weigh under 25kg, for a truly one man deployable system.

Kongsberg mesotech has introduced their dds 9000t series diver detection sonar. Two new models, the dds 9000 and dds 9001 operate at 90 khz frequency. Initially kongsberg is offering these two models with 200 degrees and 360 degrees of horizontal coverage, respectively. Different options expand the range to more than sixteen different configurations. Two levels of operator interfaces are offered with the dds 9000 series, a basic sonar processor and a sophisticated target tracking processor that can be expanded to serve up to 10 systems using ethernet connections.

The ministry of defence indicated that in consonance with government of india’s ‘make in india’ policy; indian navy on 15th november 2017, has concluded a contract with tata power strategic engineering division for supply of portable diver detection sonar (pdds) under the ‘buy and make (indian)’ category. This is the second contract to be signed by the indian navy under the ‘buy and make (indian)’ category to boost government of india’s defence indigenisation effort.

Atlas elektronik to provide cerberus portable diver detection sonar for the german navy’s f125 frigate (source: atlas elektronik; issued july 16, 2012) bremen/winfrith, germany --- atlas elektronik will deliver portable diver detection sonars for installation on the latest frigate of the german navy, type f125. Atlas, a leading supplier of naval electronic systems, has been awarded a contract by the german federal office of defence technology and procurement (bwb) for the supply of four cerberus mod2 portable diver detection sonar (dds) systems for the four f125 frigates and a fifth system for training purposes. The first system delivery is scheduled for 2012.

The aquashield ertm was developed based on the best seller aquashieldtm diver detection sonar (dds) which is widely used around the world to protect naval marine technology reporter naval exercises diver detection sonar technology news dsit solutions ltd. , an acorn energy company, receives an order for six portable diver detection sonar systems for the protection of naval vessels.

Diver Detection Sonar (DDS)

Kongsberg maritime as, sensor & robotics is celebrating the signing of a contract with saab that will see kongsberg delivering its market-leading anti-submarine warfare (asw) and diver detection sonars for the pohjanmaa-class corvettes currently being developed by the finnish navy under its squadron 2020 project. Under the terms of the contract, which equates to approximately 100mnok, kongsberg will equip the vessels with its ss2030 and sd9500 sonars, both of which boast acoustic properties which make them ideally suited for deployment in shallow-water environments.

April 29, 2012: south korea is buying an unspecified number of cerberus diver detection systems to protect its major harbors from attack by terrorists or north korean commandos. The cerberus diver detection system is a (large) refrigerator sized device that is lowered to the ocean floor in the middle of the area you want to guard. Cerberus uses sonar to detect anything large enough to be a threat, up to 1,000 meters (or more) out. Cerberus works well in shallow water and can be tweaked by the operator, once emplaced, to be even more accurate.

Ultrasound detection artificial intelligence and electronic neural networks and developments in ultrasound have made possible specialized diver-detector sonars. Experience has showed that passive sonar (i. E. Merely listening for underwater sounds) cannot detect everything; in particular it cannot easily detect rebreather divers and unequipped surface swimmers; and it can detect direction, but not distance unless readings from two or more listening stations can be correlated.

Cerberus provides diver detection (source: qinetiq; issued june 24, 2003) the threat of asymmetric attacks against ships and harbors has led to the development and launch of a new diver detection sonar by qinetiq. The attack on the uss cole in yemen, which claimed the lives of 17 american sailors and caused severe damage to the destroyer in october 2000, opened eyes to a range of threats, not only of a strike by small explosives-laden speedboats, but also from divers or small underwater vehicles.

An acoustic marine communication application that is designed to work in conjunction with other diver detection systems such as sonar etc. It is both an underwater communications system, and a high powered acoustic disruption system which can be used to ‘warn off’ or if necessary, ‘disrupt’ any unauthorised divers detected approaching or in a restricted area.

Kongsberg maritime’s anti-submarine warfare (asw) and diver detection sonars will be used on the finnish navy's new pohjanmaa-class corvettes. The corvettes are being developed under the finnish navy's squadron 2020 project. Kongsberg sensor & robotics signed a contract with saab for £7. 6 million to equip the vessels with its ss2030 and sd9500 sonars. Both sonars feature acoustic properties which make them suitable for deployment in shallow-water environments. Saab is providing and integrating the combat system for the new corvettes.

Detection of Open Circuit Diver (SCUBA) – 1000 m

2 2. R. Stolkin, a. Sutin, s. Radhakrishnan, m. Bruno, b. Fullerton, a. Ekimov, and m. Raftery, “ feature based passive detection of underwater threats,” proc. Spie 6204, 40–49 (2006). And localization 3 3. A. J. Hunter, l. Fillinger, m. Zampolli, m. C. Clarijs, and k. Verolme, “ underwater passive acoustic detection and tracking for waterside surveillance,” in proceedings of the european conference on undersea defence technology, udt, london, u. K. (june 7–9, 2011). Of an open circuit underwater breathing apparatus (uba) has been demonstrated in a harbor environment. Open circuit uba is the most common type of uba in which the breathing gas is inhaled by the diver and exhaled in the water in the form of bubbles. Even though the bubble release generates sounds, it is the inhalation that is the object of passive acoustic.

This thesis evaluates automated open-circuit scuba diver detection using low-cost passive sonar and machine learning. Previous automated passive sonar scuba diver detection systems required matching the frequency of diver breathing transients to that of an assumed diver breathing frequency. Earlier work required prior knowledge of both the number of divers and their breathing rate. Here an image processing approach is used for automated diver detection by implementing a deep convolutional neural network. Image processing was chosen because it is a proven method for sonar classification by trained human operators. The system described here is able to detect a scuba diver from a single acoustic emission from the diver. Twenty dives were conducted in support of this work at the whoi pier from october 2018 to february 2019. The system, when compared to a trained human operator, correctly classified approximately 93% of the data. When sequential processing techniques were applied, system accuracy rose to 97%. This demonstrated that a combination of low-cost, passive sonar and a properly tuned convolutional neural network can detect divers in a noisy environment to a range of at least 12. 49 m (50 feet).

DDS-03 – Diver detection sonar.

September 28, 2006 qinetiq recently made the first private, non-military sale of its cerberus high performance diver and swimmer detection sonar system into the yacht market. The system will be deployed to protect a large private yacht and its passengers while at anchor or alongside in harbour. Cerberus, designed to provide early warning of underwater threats to ships and other high value assets, has previously been trailed with naval forces around the world and is currently under extended evaluation with the us navy. A cerberus unit will be accommodated in a specially designed moon-pool built into the hull of the private yacht and is expected to go into service in early 2007. Cerberus is able to detect and locate swimmers and divers at ranges exceeding 800 metres, providing operators with sufficient time to establish whether that individual represents a threat and decide upon an appropriate response.

Image: shark marine technologies image: shark marine technologies shark marine technologies inc. Announced the integration of the ebinger 725k underwater metal detector with its own navigator diver-held imaging sonar and navigation system. This integration provides the diver with another underwater tool whose collected data can now be completely geo-referenced to the location of the diver using it. Sensory data from the metal detector is recorded to the navigators internal solid-state hard-drive where shark marine’s divelog software correlates it to the position data from the systems multiple navigation sensors. The data is provided to the diver both graphically and audibly. Integration with the navigator also allows the diver to take advantage of the system’s additional features such as the multi-beam imaging sonar which provides visual target detection capabilities and guidance even through murky waters.

Us navy orders sea guardian diver detection sonar systems (source : thales underwater systems ; issued aug. 19, 2002) thales underwater systems (tus) of templecombe, uk, in partnership with klein associates, of salem, new hampshire, usa, have recently received orders from the us navy for the supply of 15 sea guardian diver detection sonar systems.

Kongsberg maritime as, sensor & robotics has signed a contract with saab to provide anti-submarine warfare (asw) and diver detection sonars for the pohjanmaa-class corvettes currently being developed by the finnish navy under its squadron 2020 project, the company has announced on 15th april. Under the terms of the contract, which equates to approximately 100mnok, kongsberg will equip the vessels with its ss2030 and sd9500 sonars, both of which boast acoustic properties which is suited for deployment in shallow-water environments.

The sd9500, meanwhile, is a light and compact over-the-side dipping sonar with outstanding horizontal and vertical positioning capabilities for diver detection, asw duties and volumetric survey assignments in shallow, reverberation-limited waters. “we are very pleased to have been selected for another sonar program for the finnish navy and to further strengthen our position as a principal supplier of shallow-water asw, diver detection and mine-hunting equipment,” says thomas h dahle, director of sales at kongsberg.

Marine underwater magnetic, passive, concealed perimeter intrusion detection system. Perfect diver detection perimeter security solution for shallow water or near to wall or pier, wher a sonar systems are limited. Can be installed under any surface including asphalt, concrete, water or ice. Both highly sensitive and extremely reliable. Detect an intruder carrying or wearing ferromagnetic object.

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Pool leak detection and  pool leak repair in cincinnati, pool leak repair in mason and the tri-state region since 2009. Our team are the gold standard for leak repair around cincinnati ohio. Our service includes a 5 day no leak warranty and the patches are warrantied for the life of the liner so if it falls off we fix the patch for free.

if you are adding water to your pool on a regular basis, then you most likely have a crack in your pool, or a tear in your liner. Our services consist of in-water pool repair service and/or electronic leak detection. This dual inspection capability enables us to specialize in finding even the sneakiest of leaks. During every service call the, the diver dispatched will complete a full inspection on every inch of your pool. Any leaks found are fixed right on the spot.

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Prior to calling to schedule our leak detection services, please follow the below instructions and call us with the results so we can determine which service with be appropriate to help identify the source of your leak. Detecting leaks in addition to regular pool maintenance programs, our company offers fast leak detection services to diagnose and repair the source of a leak. Whether you know the source of the water loss or not, our team has the equipment to repair the problem.

Mike chellew established atlantic leak detection in 2008. Mike is a graduate of great bridge high school and virginia tech. He is also currently a vb firefighter. Mike specializes in liner resets, underwater wrinkle removal and underground plumbing leak repairs. Jamie, mike's wife, is the business manager and receptionist for the company. Mike and jamie have two children and reside in chesapeake.

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