scholarly journals Measurement of Sea Waves

Sensors ◽  
2021 ◽  
Vol 22 (1) ◽  
pp. 78
Author(s):  
Giovanni Battista Rossi ◽  
Andrea Cannata ◽  
Antonio Iengo ◽  
Maurizio Migliaccio ◽  
Gabriele Nardone ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Human Activities ◽  
Measurement Techniques ◽  
Satellite Observation ◽  
Natural Phenomenon ◽  
Sea Waves ◽  
Global Networks ◽  
Measurement Principle

Sea waves constitute a natural phenomenon with a great impact on human activities, and their monitoring is essential for meteorology, coastal safety, navigation, and renewable energy from the sea. Therefore, the main measurement techniques for their monitoring are here reviewed, including buoys, satellite observation, coastal radars, shipboard observation, and microseism analysis. For each technique, the measurement principle is briefly recalled, the degree of development is outlined, and trends are prospected. The complementarity of such techniques is also highlighted, and the need for further integration in local and global networks is stressed.

scholarly journals Diesel in Antarctica and a Bibliometric Study on Its Indigenous Microorganisms as Remediation Agent

2021 ◽  
Vol 18 (4) ◽  
pp. 1512
Author(s):  
Rasidnie Razin Wong ◽  
Zheng Syuen Lim ◽  
Noor Azmi Shaharuddin ◽  
Azham Zulkharnain ◽  
Claudio Gomez-Fuentes ◽  
...  
Keyword(s):  
Energy Source ◽  
Renewable Energy ◽  
Low Temperature ◽  
Bibliometric Analysis ◽  
Human Activities ◽  
Enzymatic Degradation ◽  
Gradual Increase ◽  
Bibliometric Study ◽  
Natural State ◽  
Living Organisms

Diesel acts as a main energy source to complement human activities in Antarctica. However, the increased expedition in Antarctica has threatened the environment as well as its living organisms. While more efforts on the use of renewable energy are being done, most activities in Antarctica still depend heavily on the use of diesel. Diesel contaminants in their natural state are known to be persistent, complex and toxic. The low temperature in Antarctica worsens these issues, making pollutants more significantly toxic to their environment and indigenous organisms. A bibliometric analysis had demonstrated a gradual increase in the number of studies on the microbial hydrocarbon remediation in Antarctica over the year. It was also found that these studies were dominated by those that used bacteria as remediating agents, whereas very little focus was given on fungi and microalgae. This review presents a summary of the collective and past understanding to the current findings of Antarctic microbial enzymatic degradation of hydrocarbons as well as its genotypic adaptation to the extreme low temperature.

scholarly journals Procesy zarządzania ryzykiem ekologicznym

2009 ◽  
Vol 7 (1) ◽  
pp. 157-164
Author(s):  
Marta Dołęga ◽  
Krzysztof Biernat
Keyword(s):  
Risk Management ◽  
Human Activities ◽  
Natural Phenomenon ◽  
Environmental Component ◽  
Potential Risks

Risk management relies on identification, estimation, control and finance of potential risks. Excient process of management against alternate of ecological threat it’s people and nature resources protection before threats related to pollution of water, air, soil and other components of environment, which balance has been broken by reason of pronouncement of unexpected natural phenomenon, industrial failure and human activities. Negative environmental results are caused in case of pronouncement of threat damage to environmental component pollutions and ecosystems changes.

scholarly journals Arctic stratospheric dehydration – Part 1: Unprecedented observation of vertical redistribution of water

2013 ◽  
Vol 13 (22) ◽  
pp. 11503-11517 ◽  
Author(s):  
S. M. Khaykin ◽  
I. Engel ◽  
H. Vömel ◽  
I. M. Formanyuk ◽  
R. Kivi ◽  
...  
Keyword(s):  
Water Vapour ◽  
Stratospheric Ozone ◽  
Measurement Techniques ◽  
Thick Layer ◽  
Satellite Observation ◽  
The Arctic ◽  
Ice Particles ◽  
Climate Interactions ◽  
Stratospheric Clouds

Abstract. We present high-resolution measurements of water vapour, aerosols and clouds in the Arctic stratosphere in January and February 2010 carried out by in situ instrumentation on balloon sondes and high-altitude aircraft combined with satellite observations. The measurements provide unparalleled evidence of dehydration and rehydration due to gravitational settling of ice particles. An extreme cooling of the Arctic stratospheric vortex during the second half of January 2010 resulted in a rare synoptic-scale outbreak of ice polar stratospheric clouds (PSCs) remotely detected by the lidar aboard the CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation) satellite. The widespread occurrence of ice clouds was followed by sedimentation and consequent sublimation of ice particles, leading to vertical redistribution of water inside the vortex. A sequence of balloon and aircraft soundings with chilled mirror and Lyman- α hygrometers (Cryogenic Frostpoint Hygrometer, CFH; Fast In Situ Stratospheric Hygrometer, FISH; Fluorescent Airborne Stratospheric Hygrometer, FLASH) and backscatter sondes (Compact Optical Backscatter Aerosol Detector, COBALD) conducted in January 2010 within the LAPBIAT (Lapland Atmosphere-Biosphere Facility) and RECONCILE (Reconciliation of Essential Process Parameters for an Enhanced Predictability of Arctic Stratospheric Ozone Loss and its Climate Interactions) campaigns captured various phases of this phenomenon: ice formation, irreversible dehydration and rehydration. Consistent observations of water vapour by these independent measurement techniques show clear signatures of irreversible dehydration of the vortex air by up to 1.6 ppmv in the 20–24 km altitude range and rehydration by up to 0.9 ppmv in a 1 km thick layer below. Comparison with space-borne Aura MLS (Microwave Limb Sounder) water vapour observations allow the spatiotemporal evolution of dehydrated air masses within the Arctic vortex to be derived and upscaled.

scholarly journals Revitalization of Renewable Energy Generation in Nusa Penida

2020 ◽  
Author(s):  
Core UDAYANA ◽  
Satya Kumara
Keyword(s):  
Renewable Energy ◽  
Electricity Generation ◽  
Power Plants ◽  
Central Government ◽  
Electrical Energy ◽  
Biofuel Production ◽  
Sea Waves ◽  
Natural Energy ◽  
Waves And Currents ◽  
The Republic

Tiga Nusa is a group of small islands in the southeast of Bali separated by Badung Straits. The group consists of Nusa Penida, Nusa Ceningan and Nusa Lembongan islands. The electricity network of Tiga Nusa is isolated from Bali. Most of the used electrical energy is produced using fossil-based fuel power plants, although the islands have a high potential of natural energy resources. The identified potential of natural energy in the islands include PV electricity generation, wind power electricity generation, as well as electricity from sea waves and currents. Biofuel production from jatropha has also been identified. From this perspective, the islands have huge potential for renewable generation. In fact, many of these resources have been captured and used to generate electricity. For example, wind turbines, solar photovoltaic, and biofuels production facilities have been developed. The projects are built by government or state-owned-enterprises and handed over to local communities. In general, most of the renewable energy pilot projects in Nusa Penida also have experienced problems and many of them are now actually abandoned and require substantial repairs. The central government of the Republic of Indonesia has allocated budget to revitalize these facilities including conducting repairs to many of these plants.

scholarly journals Land Use Activities and Their Effects on Soil Erosion on the Slopes of Kajulu Hills, Kisumu County, Kenya

2019 ◽  
Vol 11 (2) ◽  
pp. 68
Author(s):  
Otieno, J. ◽  
Otieno, A. C. ◽  
Tonui, K. W
Keyword(s):  
Land Use ◽  
Soil Erosion ◽  
Human Activities ◽  
World Wide ◽  
Arable Land ◽  
Mitigation Measures ◽  
Natural Phenomenon ◽  
Mountainous Regions ◽  
The World ◽  
The Hill

Soil erosion is a natural phenomenon, but human activities accelerate it between ten to forty times the natural occurrences. It therefore calls for mitigating measure to curb the effects of erosion since soils form at a slower rate than they are destroyed. A study on land use activities and their effects on soil erosion was conducted in the upland ecosystem in Kenya, Kajulu hills. The study assessed the effectiveness of the mitigation measures adopted by the residents to ease the effects erosion on the hill slopes. A sample size of 295 households out of 1600 households engaged in various mitigating practices was used. The study collected data on the magnitude of soil (kg) lost from the arable lands using collector ditch technique. The data were analyzed using frequency distribution tables and Man U-test. The result showed a double amount (1.198kg/m2) of soil lost on the arable land without mitigation measures as compared to plots under cut off ditches (0,615kg/m2) and vegetative strips (0.904kg/m2) with Man U=7. These findings were above the world wide estimation of soil erosion on arable mountainous regions which range between 1.3-40.kg/m2/year (13-40T/Ha/year) as it was based on one rainy season.

scholarly journals Thermal Balance in the Process of Fresh Water Production from Atmospheric Air Using the Sea Waves Renewable Energy

2018 ◽  
Vol 170 ◽  
pp. 04018 ◽  
Author(s):  
Victor Mironov ◽  
Yuriy Ivanyushin ◽  
Evgeniy Zhernakov ◽  
Dmitriy Mironov
Keyword(s):  
Drinking Water ◽  
Renewable Energy ◽  
Fresh Water ◽  
Technology Implementation ◽  
Political Stability ◽  
Water Production ◽  
Sea Waves ◽  
Atmospheric Air ◽  
Drinking Water Production ◽  
Water Sufficiency

Climatic changes and man-induced environmental load cause to a shortage of drinking quality fresh water. Upon that, fresh water sufficiency is one of the preconditions for quality assurance in adequate living standards as well as for domestic and foreign political stability especially in developing countries. A lot of technologies of fresh drinking water production are known today. Most of them involve significant power consumption and endanger to environment. As a rule these technologies use non-renewable hydrocarbons as power source. The author-developed technology of fresh drinking water obtaining from atmospheric air involves the use of clean renewable energy of the sea. This article bases the method of water production from the air. It is also describes technology implementation energy balance.

scholarly journals Strategies to Improve Urban Energy Efficiency for Urban Resilience

2021 ◽  
Vol 1203 (2) ◽  
pp. 022020
Author(s):  
Yalim Gültekin
Keyword(s):  
Climate Change ◽  
Energy Efficiency ◽  
Renewable Energy ◽  
Human Activities ◽  
Urban Form ◽  
Energy Use ◽  
Building Design ◽  
Urban Resilience ◽  
Spatial Strategies ◽  
Urban Energy

Abstract Greenhouse gas (GHG), which is a determining factor in climate change is a result of human activities, namely climate change is human-caused (anthropogenic). Cities, where 60% of the world's population of approximately 7.3 billion living today, are responsible for 60-80% consumption of energy, which is the lifeblood of intense human activities, thus at least 70% of GHG. Nevertheless, cities are the cause of climate change and other global environmental problems, as well as the innovation centres and laboratories to deal with their impact. With climate change becoming more explicit and active in the 21st century, researchers, governments and international institutions question cities’ strength/vulnerability against these problems, especially their energy production and consumption patterns that cause GHG, and they anticipate that urban resilience be the motivating force for urban policies. The widespread and effective use of renewable energy is regarded as an influential tool against climate change. However, this should be endorsed by spatial strategies. In the light of this approach, this study evaluates the urban form, building design and production technologies that are focused on energy efficiency and renewable energy use.

A Helium II Heat Transfer Level Meter

2000 ◽  
Author(s):  
T. Zhang ◽  
M. R. Smith ◽  
S. W. Van Sciver
Keyword(s):  
Heat Transfer ◽  
Transfer Rate ◽  
Measurement Techniques ◽  
Liquid Level ◽  
Heat Transfer Analysis ◽  
New Type ◽  
Measurement Principle ◽  
Level Meter ◽  
Helium Level ◽  
The Relationship

Abstract This paper presents the design and measurement techniques for a new type of liquid helium level meter. The measurement principle is given by the change of heat transfer rate with the liquid level. Detailed heat transfer analysis has been done to show the anticipated behavior and accuracy of the meter. To verify our design, a prototype level meter was fabricated and tested in saturated He II bath with temperature from 1.7 K to 2.0 K. With the experiment, we obtained the relationship between overall heater power and liquid level. The data indicate that the device can measure liquid level with the uncertainty of ±1 mm in a practical system.

scholarly journals Land use change impact on flood reduction capacity of lake sentani, jayapura

2018 ◽  
Vol 7 (3.29) ◽  
pp. 115
Author(s):  
Elroy Koyari ◽  
Runi Asmaranto
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Human Activities ◽  
Surface Runoff ◽  
Hydrological Cycle ◽  
Land Use Changes ◽  
Natural Phenomenon ◽  
Flood Discharge ◽  
Change Impact ◽  
Impervious Areas

Flood is a natural phenomenon that occurs in certain places due to natural causes and human activities. However, the imbalance in hydrological cycle will cause the flood to do damage, both materially and non-materially. Therefore, it is important to control the occurrence and magnitude. Human activities that can cause such imbalance, one of them, is land use change. Many areas of pervious area are shifting into impervious areas, which will increase the amount of surface runoff generated. This research will cover about how land use changes over the year can influence the surface runoff generated in a certain area. This research is conducted in Sentani watershed, Jayapura, Papua, Indonesia. Calculation with the aid of ArcMap 10.1 and WinTR-20 results in around 6% changes in flood discharge in the outlet for land use in year 2007, 2010, 2012, and 2016. The reservoir capacity in reducing flood discharge is also increasing over the years.   

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