scholarly journals The conceptual of re-design propulsion system and ship electricity management to reduce waste emission

2021 ◽  
Vol 6 (2) ◽  
pp. 104-113
Author(s):  
Abdul Rahman ◽  
Antariksa ◽  
Bambang Semedi ◽  
Slamet Wahyudi
Keyword(s):  
Climate Change ◽  
Support System ◽  
United States Navy ◽  
Electric Propulsion ◽  
The United States ◽  
Climate Fluctuations ◽  
Natural Processes ◽  
Large Benefit ◽  
Almost All

Climate change is a serious threat to the environment and socioeconomic globally. Climate change is caused by natural processes and due to human activities that have resulted in long-term climate fluctuations and even globally over the past few decades, the climate has experienced a fairly rapid rise in average temperatures. Climate change is mainly caused due to ozone depletion which results in changes in greenhouse effect conditions. The International Maritime Organization (IMO) has adopted standards to reduce sulfur pollution from ships. The majority of naval warships today use conventional mechanical propulsion systems where the power from the main propulsion is transmitted to the propeller through gearboxes. The ships owned by the Navy almost all still use conventional thrust systems with diesel engine starters. With a conventional support system. The latest innovation in the support system that has been carried out, namely on the United States Navy warship TAKE-1 (the destroyer ship), whereby changing the support system from conventional to electricity with the concept of Integrated Fully Electric Propulsion (IFEP) can reduce fuel use by 10% to 25%. IFEP application if applied to ships of the Navy, will obtain a very large benefit in overcoming environmental problems namely reducing air pollution.

The geography of climate migration

2021 ◽  
pp. 1-37
Author(s):  
Michał Burzyński ◽  
Frédéric Docquier ◽  
Hendrik Scheewel
Keyword(s):  
Climate Change ◽  
International Migration ◽  
First Century ◽  
Long Term Effects ◽  
Mobility Data ◽  
Rural And Urban ◽  
Working Age ◽  
Internal Mobility ◽  
Almost All

Abstract In this paper, we investigate the long-term effects of climate change on the mobility of working-age people. We use a world economy model that covers almost all the countries around the world, and distinguishes between rural and urban regions as well as between flooded and unflooded areas. The model is calibrated to match international and internal mobility data by education level for the last 30 years, and is then simulated under climate change variants. We endogenize the size, dyadic, and skill structure of climate migration. When considering moderate climate scenarios, we predict mobility responses in the range of 70–108 million workers over the course of the twenty-first century. Most of these movements are local or inter-regional. South–South international migration responses are smaller, while the South–North migration response is of the “brain drain” type and induces a permanent increase in the number of foreigners in OECD countries in the range of 6–9% only. Changes in the sea level mainly translate into forced local movements. By contrast, inter-regional and international movements are sensitive to temperature-related changes in productivity. Lastly, we show that relaxing international migration restrictions may exacerbate the poverty effect of climate change at origin if policymakers are unable to select/screen individuals in extreme poverty.

scholarly journals Testing Farmers’ Perception of Climate Variability: A Case Study from Kirtipur of Kathmandu Valley

2012 ◽  
pp. 30-34
Author(s):  
Jiban Mani Poudel
Keyword(s):  
Climate Change ◽  
Climate Variability ◽  
Global Climate ◽  
Climatic Variability ◽  
Global Perspective ◽  
Kathmandu Valley ◽  
Climatic Fluctuations ◽  
Climate Fluctuations ◽  
Global And Local

In the 21st century, global climate change has become a public and political discourse. However, there is still a wide gap between global and local perspectives. The global perspective focuses on climate fluctuations that affect the larger region; and their analysis is based on long-term records over centuries and millennium. By comparison, local peoples’ perspectives vary locally, and local analyses are limited to a few days, years, decades and generations only. This paper examines how farmers in Kirtipur of Kathmandu Valley, Nepal, understand climate variability in their surroundings. The researcher has used a cognized model to understand farmers’ perception on weather fluctuations and climate change. The researcher has documented several eyewitness accounts of farmers about weather fluctuations which they have been observing in a lifetime. The researcher has also used rainfall data from 1970-2009 to test the accuracy of perceptions. Unlike meteorological analyses, farmers recall and their understanding of climatic variability by weather-crop interaction, and events associating with climatic fluctuations and perceptions are shaped by both physical visibility and cultural frame or belief system.DOI: http://dx.doi.org/10.3126/hn.v11i1.7200 Hydro Nepal Special Issue: Conference Proceedings 2012 pp.30-34

Condition Based Maintenance, Life Cycle Management, and Autolog

2003 ◽  
Author(s):  
Edward L. Hilferty
Keyword(s):  
United States Navy ◽  
Gas Turbines ◽  
Life Cycle Management ◽  
The United States ◽  
Condition Based Maintenance ◽  
Critical Systems ◽  
Time Data ◽  
Record Keeping ◽  
Mean Time

Condition Based Maintenance (CBM) was instituted by the United States Navy in a policy outlined in OPNAV INSTRUCTION 4790.16 dated 6 May 1998. The goal is to move from time-directed preventive maintenance to condition-directed maintenance. It is hoped this will optimize readiness while reducing maintenance and manning requirements. The concept is that use of sensors, algorithms, and automated reasoning and decision making models to monitor equipment operations will provide critical analyses to operators that will help prevent impending failure. Red flags to operators allows maximization of maintenance effort that will focus limited resources to areas most needed to ensure safety and mission readiness while simultaneously minimizing operating costs (O & S), labor, and risk of mission degrading failures (Hedderich [3]). For the U.S. Navy, there is a large chasm to bridge between vision and reality. CBM technology is being slowly tested and integrated. But testing, modifying and back fitting all the Navy’s critical systems with CBM technology will be long term and costly and will be constantly faced with the dilemma of having just integrated one technology as it is being replaced by newer ones. In the mean time, more focus could be paid to possible interim phases that could be more quickly and cheaply integrated and still move the Navy forward in utilizing CBM technology. Autolog is such an effort and is offered here as an application and process to gather more real time data needed for CBM from one source that can be quickly and easily provided to distant engineering support activities for Gas Turbines systems while also easing record keeping and data transmittal requirements for the fleet.

A public-private collaboration initiative for innovative Earth Observation (EO) technologies and methodologies for investigating climate change impacts by means of an inter-disciplinary approach: the OT4CLIMA project

2020 ◽  
Author(s):  
Nicola Pergola ◽  
Carmine Serio ◽  
Francesco Ripullone ◽  
Francesco Marchese ◽  
Giuseppe Naviglio ◽  
...  
Keyword(s):  
Climate Change ◽  
Technological Innovation ◽  
Regional Scale ◽  
Climate Change Impacts ◽  
Earth Observation ◽  
Ministry Of Education ◽  
Natural Processes ◽  
Company Survey ◽  
Industrial Partnership

<p>The OT4CLIMA project, funded by the Italian Ministry of Education, University and Research, within the PON 2014-2020 Industrial Research program, “Aerospace” thematic domain, aims at developing advanced Earth Observation (EO) technologies and methodologies for improving our capability to better understand the effects of Climate Change (CC) and our capability to mitigate them at the regional and sub-regional scale. Both medium-to-long term impacts (e.g. vegetation stress, drought) and extreme events with rapid dynamics (e.g. intense meteorological phenomena, fires) will be investigated, trying a twofold (i.e. interesting both “products” and “processes”) technological innovation: a) through the design and the implementation of advanced sensors to be mounted on multiplatform EO systems; b) through the development of advanced methodologies for EO data analysis, interpretation, integration and fusion.</p><p>Activities will focus on two of the major natural processes strictly related to Climate Change, namely the Carbon and Water Cycles by using an inter-disciplinary approach.</p><p>As an example, the project will make it possible the measurements, with an unprecedented accuracy of atmospheric (e.g. OCS, carbon-sulphide) and surface (e.g. soil moisture) parameters that are crucial in determining the vegetation contribution to the CO2 balance, suggesting at the same time solutions based on the analysis and integration of satellite, airborne and unmanned data, in order to significantly improve the capability of local communities to face the short- and long-term CC-related effects.</p><p>OT4CLIMA benefits from a strong scientific expertise (14 CNR institutes, ASI, INGV, CIRA, 3 Universities), considerable research infrastructures and a wide industrial partnership (including both big national players, i.e. E-Geos and IDS companies and well-established italian SMEs consortia, i.e. CREATEC, CORISTA and SIIT, and a spin-off company, Survey Lab) specifically focused on the technological innovation frontier.</p><p>This contribution would summarize the project main objectives and show some activities so far carried out.</p>

Historical Perspectives: Physiology in microgravity

2000 ◽  
Vol 89 (1) ◽  
pp. 379-384 ◽  
Author(s):  
John B. West
Keyword(s):  
Orthostatic Intolerance ◽  
Cell Mass ◽  
Space Station ◽  
The United States ◽  
Skeletal Muscle Atrophy ◽  
Physiological Changes ◽  
Historical Perspectives ◽  
The Past ◽  
Almost All

Studies of physiology in microgravity are remarkably recent, with almost all the data being obtained in the past 40 years. The first human spaceflight did not take place until 1961. Physiological measurements in connection with the early flights were crude, but, in the past 10 years, an enormous amount of new information has been obtained from experiments on Spacelab. The United States and Soviet/Russian programs have pursued different routes. The US has mainly concentrated on relatively short flights but with highly sophisticated equipment such as is available in Spacelab. In contrast, the Soviet/Russian program concentrated on first the Salyut and then the Mir space stations. These had the advantage of providing information about long-term exposure to microgravity, but the degree of sophistication of the measurements in space was less. It is hoped that the International Space Station will combine the best of both approaches. The most important physiological changes caused by microgravity include bone demineralization, skeletal muscle atrophy, vestibular problems causing space motion sickness, cardiovascular problems resulting in postflight orthostatic intolerance, and reductions in plasma volume and red cell mass. Pulmonary function is greatly altered but apparently not seriously impaired. Space exploration is a new frontier with long-term missions to the moon and Mars not far away. Understanding the physiological changes caused by long-duration microgravity remains a daunting challenge.

scholarly journals China and Climate Change Governance: A Golden Opportunity

2022 ◽  
pp. 1-12
Author(s):  
Barry Buzan
Keyword(s):  
Climate Change ◽  
The United States ◽  
The European Union ◽  
Climate Governance ◽  
Policy Adjustment ◽  
The World ◽  
Golden Opportunity ◽  
Climate Action ◽  
Climate Crisis

Climate change is a threat to all of humankind, yet there is still a leadership vacuum on climate governance. At the same time, the deepening climate crisis also presents a golden opportunity for Beijing to assume the role of a global leader. China has the capacity to do it in a way that the United States, Russia, India, and the European Union do not. Taking swift climate action is in Beijing’s interest. Greater contributions to climate governance will certainly help advance China’s long-term political interest in both raising its political status and demonstrating the claimed superiority of its system of government. Positive rhetoric and robust action by China are likely to have a disproportionate effect on the rest of the world. Policy adjustment and implementation by Beijing will bring benefits to the rest of the world. Climate policy options that Beijing may take in the future are not mutually exclusive. The policy shift on climate change could also be attached more firmly to the idea of sustainable development as a defining factor of China’s approach to tackling the climate change threat.

scholarly journals Not all biodiversity rich spots are climate refugia

2021 ◽  
Vol 18 (24) ◽  
pp. 6567-6578
Author(s):  
Ádám T. Kocsis ◽  
Qianshuo Zhao ◽  
Mark J. Costello ◽  
Wolfgang Kiessling
Keyword(s):  
Climate Change ◽  
Global Warming ◽  
Global Scale ◽  
Absolute Temperature ◽  
Elevated Risk ◽  
Anthropogenic Climate Change ◽  
Range Shifts ◽  
Future Warming ◽  
Almost All

Abstract. Anthropogenic climate change is increasingly threatening biodiversity on a global scale. Rich spots of biodiversity, regions with exceptionally high endemism and/or number of species, are a top priority for nature conservation. Terrestrial studies have hypothesized that rich spots occur in places where long-term climate change was dampened relative to other regions. Here we tested whether biodiversity rich spots are likely to provide refugia for organisms during anthropogenic climate change. We assessed the spatial distribution of both historic (absolute temperature change and climate change velocities) and projected climate change in terrestrial, freshwater, and marine rich spots. Our analyses confirm the general consensus that global warming will impact almost all rich spots of all three realms and suggest that their characteristic biota is expected to witness similar forcing to other areas, including range shifts and elevated risk of extinction. Marine rich spots seem to be particularly sensitive to global warming: they have warmed more, have higher climate velocities, and are projected to experience higher future warming than non-rich-spot areas. However, our results also suggest that terrestrial and freshwater rich spots will be somewhat less affected than other areas. These findings emphasize the urgency of protecting a comprehensive and representative network of biodiversity-rich areas that accommodate species range shifts under climate change.

Politicization and Polarization in Climate Change News Content, 1985-2017

2020 ◽  
Vol 42 (1) ◽  
pp. 112-129 ◽  
Author(s):  
Sedona Chinn ◽  
P. Sol Hart ◽  
Stuart Soroka
Keyword(s):  
Climate Change ◽  
United States ◽  
News Coverage ◽  
The United States ◽  
Media Representations ◽  
Computer Assisted ◽  
Political Actors ◽  
Content Analyses ◽  
Long Term Trends

Despite concerns about politicization and polarization in climate change news, previous work has not been able to offer evidence concerning long-term trends. Using computer-assisted content analyses of all climate change articles from major newspapers in the United States between 1985 and 2017, we find that media representations of climate change have become (a) increasingly politicized, whereby political actors are increasingly featured and scientific actors less so and (b) increasingly polarized, in that Democratic and Republican discourses are markedly different. These findings parallel trends in U.S. public opinion, pointing to these features of news coverage as polarizing influences on climate attitudes.

scholarly journals Religion and Climate Change: Rain Rituals in Israel, China, and Haiti

Religions ◽  
2020 ◽  
Vol 11 (11) ◽  
pp. 554
Author(s):  
Gerald Murray ◽  
Haiyan Xing
Keyword(s):  
Climate Change ◽  
Northwest China ◽  
Human Populations ◽  
Climate Fluctuations ◽  
African Rainfall ◽  
Urban Minorities ◽  
Anthropological Fieldwork ◽  
Religious Systems ◽  
Climate Crisis

Human populations confront three distinct climate challenges: (1) seasonal climate fluctuations, (2) sporadic climate crises, and (3) long term climate change. Religious systems often attribute climate crises to the behavior of invisible spirits. They devise rituals to influence the spirits, and do so under the guidance of religious specialists. They devise two types of problem-solving rituals: anticipatory climate maintenance rituals, to request adequate rainfall in the forthcoming planting season, and climate crisis rituals for drought or inundations. The paper compares rainfall rituals in three different settings: Israel (Judaism), Northwest China (ethnic village religion), and Haiti (Vodou). Each author has done anthropological fieldwork in one or more of these settings. In terms of the guiding conceptual paradigm, the analysis applies three sequentially organized analytic operations common in anthropology: (1) detailed description of individual ethnographic systems; (2) comparison and contrast of specific elements in different systems; and (3) attempts at explanation of causal forces shaping similarities and differences. Judaism has paradoxically maintained obligatory daily prayers for rain in Israel during centuries when most Jews lived as urban minorities in the diaspora, before the founding of Israel in 1948. The Tu of Northwest China maintain separate ethnic temples for rainfall rituals not available in the Buddhist temples that all attend. The slave ancestors of Haiti, who incorporated West African rituals into Vodou, nonetheless excluded African rainfall rituals. We attribute this exclusion to slavery itself; slaves have little interest in performing rituals for the fertility of the fields of their masters. At the end of the paper, we identify the causal factors that propelled each systems into a climate-management trajectory different from that of the others. We conclude by identifying a common causal factor that exerts a power over religion in general and that has specifically influenced the climate responses of all three religious systems.

Decentralized wastewater management: challenges and opportunities for the twenty-first century

2004 ◽  
Vol 4 (1) ◽  
pp. 95-102 ◽  
Author(s):  
G. Tchobanoglous ◽  
L. Ruppe ◽  
H. Leverenz ◽  
J. Darby
Keyword(s):  
United States ◽  
The United States ◽  
First Century ◽  
Wastewater Management ◽  
Challenges And Opportunities ◽  
Liquid Portion ◽  
Twenty First Century ◽  
Almost All ◽  
Economic Constraints

Decentralized wastewater management (DWM) may be defined as the collection, treatment, and reuse of wastewater from individual homes, clusters of homes, subdivisions, and isolated commercial facilities at or near the point of waste generation. In some areas, the liquid portion could be transported to a central point for further treatment and reuse. At the time of writing (2002), more than sixty million people in the United States live in homes where individual decentralized systems are used for wastewater management. Further, the U.S. EPA now estimates that about 40 percent of the new homes being built are served with onsite systems. In the early 1970s, with the passage of the Clean Water Act, it was often stated that it was only a matter of time before sewerage facilities would be available to almost all residents of the continental United States. Now, more than 25 years later, it is recognized that complete sewerage of the entire U.S. may never be possible, due to both geographic and economic constraints. Because complete sewerage is unlikely in the foreseeable future, it is clear that DWM systems are needed for the protection of public health and the environment and for the development of long-term strategies for the management of our water resources. The challenges and opportunities for DWM systems in the twenty-first century are discussed in this paper.

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