Serwis Infona wykorzystuje pliki cookies (ciasteczka). Są to wartości tekstowe, zapamiętywane przez przeglądarkę na urządzeniu użytkownika. Nasz serwis ma dostęp do tych wartości oraz wykorzystuje je do zapamiętania danych dotyczących użytkownika, takich jak np. ustawienia (typu widok ekranu, wybór języka interfejsu), zapamiętanie zalogowania. Korzystanie z serwisu Infona oznacza zgodę na zapis informacji i ich wykorzystanie dla celów korzytania z serwisu. Więcej informacji można znaleźć w Polityce prywatności oraz Regulaminie serwisu. Zamknięcie tego okienka potwierdza zapoznanie się z informacją o plikach cookies, akceptację polityki prywatności i regulaminu oraz sposobu wykorzystywania plików cookies w serwisie. Możesz zmienić ustawienia obsługi cookies w swojej przeglądarce.
The knowledge of water temperature profiles of the upper-ocean mixed layer provides valuable input to climate studies, weather forecasts and oceanography in general. A remote-sensing lidar is an attractive method for real-time measurements of these data. The principle idea of our approach is a lidar using the time-of-flight information to measure the depth and relying on spontaneous Brillouin scattering...
The Office of Technology, Planning, and Integration for Observation (TPIO) maintains gap analysis tools that are used to compare both observing system attributes and the National Oceanic and Atmospheric Administration (NOAA) User Observation Requirements to help answer NOAA-wide business questions regarding observational needs and investment. Using the information connected to NOAA products, a capabilities...
Deep-sea hydraulic system has a high demand for the quality of hydraulic oil. Vacuum filtration and heating operation can effectively remove the water and air bubbles in the mixed oil. A multifunctional oil equipment is proposed in this paper, which possesses both oil filtering and filling functions by vacuum-heating filtering and vacuum-high pressure oiling methods. Finally, the purification effect...
An enhanced current meter was deployed in the Antarctic in March, 2017, to measure vertical heat flux in the deep ocean. The purpose of this measurement of flux is to understand how mixing of dense Weddell Sea Bottom Water becomes Antarctic Bottom Water (AABW), the densest water of the Atlantic Ocean outside of trenches. Deep mixing is one of the problems that is not yet well understood despite its...
The surf-zone presents unique challenges and opportunities for observational oceanography. Physical and biogeochemical signals change quickly in and around breaking surface waves due to high magnitudes of momentum and mass transfer. Autonomous instruments can be challenging to deploy in this energetic zone. We are developing the Smartfin, a surfboard fin capable of measuring geolocated ocean chemistry...
Recent studies on global climate change have identified the Arctic as the fastest warming region on Earth. Resulting trends of receding sea ice have led to more accessible Arctic waterways during summer months and an anticipated increase in maritime transport throughout the region. Prolonged access between North America and Europe via the Northeast Passage is of significant interest to the international...
Alaska's coastal communities are facing increased coastal hazards. Accurate predictive models are necessary to anticipate how various hazards may affect communities over time. Currently, erosion projections do not take into account the non-linear increase in erosion due to warming near-shore water, air, and permafrost. University of Alaska, Anchorage (UAA) is developing an arctic-capable coastal geomorphic...
Hydrothermal vent fluids play very important role in the deep-sea geochemistry cycle, and support the extreme biological communities. But, there are very few sensors can be used for the in situ measurement of the chemical compositions of the emerging vent fluids. The extremely high temperature and pressure will kill most of them. The traditional sampling technology cannot maintain the sample temperate...
The QARTOD methodology of a standard sequential string of tests on individual measurements has high applicability to constrained data systems. The QARTOD methodology has the benefit of a coherent and replicable test structure that enables relatively easy expansion into new measurements. However, as data streams become more complex the series of tests described becomes increasingly difficult to analyse...
The extremely cold environment experienced by outboard cables used in the Earth's polar regions necessitates careful selection of polymers for use as jackets. The U.S. Navy has two specifications for neoprene (polychloroprene) cable jackets — one designated “Arctic neoprene” because of its extreme low temperature flexibility requirement (−54°C) and the other designated by default as “standard neoprene”...
In this study, turbulent flows were measured using the Expendable Vertical Microstructure Profiler (VMP-X) at the hydrothermal fields in the Okinawa Trough (Iheya North field and Noho site) and Sagami Bay (off Itoh and at Ohmuro Caldera) to characterize the turbulence intensity. For each observation point, the turbulent flow data were successfully measured between the sea surface and the sea floor...
This paper presents an approach using small and swarm-capable autonomous underwater vehicles (AUVs) as flexible measurement devices for observing oceanic submesoscale eddies. The robots equipped with environmental sensors are placed near interesting oceanographic structures to measure the water column along different trajectories. The robots communicate acoustically while diving in a saw tooth pattern...
The National Oceanic and Atmospheric Administration's Ecosystems and Fisheries Oceanography Coordinated Investigations biophysical mooring site 2 (M2, 56.9°N, 164°W) time series, one of the longest running time series of its kind, has provided near-continuous biophysical measurements of the southeastern Bering Sea shelf since 1995. Since then, the array has evolved into four long-term monitoring sites...
User friendly tools strongly influence the use of scientific measurements from marine observatory platforms. Nowadays, because of the huge amount of marine data, available in many different formats, automate methodologies are required to effectively reduce the human effort. This work presents oceanobs, an open-source Python package that provides a wide range of tools to analyze data from marine observatories,...
Nowadays, Long sequences observations and modeling of artificial upwelling area is the key research direction in artificial upwelling. The traditional single point observations are not representative to the artificial upwelling region where environmental parameters are uneven distribution or change is complex. In order to obtain real-time, continuous and large-scale flow rate and temperature distribution...
While low Dissolved Oxygen (DO) concentrations are not uncommon in the coastal ocean, what is less understood is how the location and size of these low DO regions vary and what impact that variability has on ecosystem health. Therefore, alternative sampling strategies are needed to continuously map these low DO areas in a way that quantifies this variability. This project applies a series of Autonomous...
The following paper describes the design, implementation and preliminary tests of an Unmanned Surface Vessel (USV) robot, able to collect water quality parameters and bathymeter measurements in lakes and bodies of fresh water at the Peruvian highlands. The USV robot is developed in order to be a measurement tool to monitor water pollution and help to improve the current methods used for this task...
An application guide for the design, installation, testing, commissioning and maintenance of skin effect trace heating systems for pipelines, vessels, equipment, and structures intended for use in general industrial applications are provided in this standard. This standard provides requirements when utilizing skin effect trace heating systems in ordinary as well as hazardous areas having potentially...
Specific testing requirements for qualifying electrical resistance trace heating for use in industrial applications in ordinary locations, as well as a basis for electrical and thermal design, are included in this standard.
The semiconductor packaging technology trend for electronic products continues to achieve greater miniaturization and higher functionality. Thinner profile chip scale packaging (CSP), such as flip chip CSP (fcCSP), with increasing die complexities is a very important technology for next generation communication devices and internet of things (IoT) applications. Recently, integrated fan out wafer-level...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.