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Research And Application Of Casing Milling And Fishing Technology In Floor Comb-Shaped Directional Borehole, Guan Qiangsheng, Wei Hongchao

Coal Geology & Exploration

In order to solve the problem that using the conventional strong-force rotary drawing process for borehole sticking accident in comb-shaped directional borehole in floor is not ideal, and using reverse thread drill pipe or strong twist cause big time and economic loss, through the calculation and analysis of the passing capacity of casing milling and fishing pipe in the curved hole, the technical parameters of casing milling and fishing, the sticking accident of floor comb-shaped directional borehole with the depth of 344 m in a coal mine in Henan Province was successfully solved. The application results show that the maximum …

Evaluation Of Coalbed Methane Drainage Effect For Multi-Target Seams In Jincheng Region, Yang Jianchao, Li Guihong, Liu Yuhui, Li Guofu, Wang Chaoshuai, Sun Tianyu

Coal Geology & Exploration

The study of the multi-target seams drainage effect on coalbed methane wells has great value, including coal safe mining, underground gas control, determination of development technical indicators, single well production, rational division of development layer, efficient development of coalbed methane, and development of medium and long-term coalbed methane development planning. Taking Chengzhuang mine of Jincheng as an example, the sampling data of the extraction effect in the middle and late stages of development are compared with the original gas content of the adjacent wells to evaluate the extraction effect, and the main control factors affecting the drainage effect are analyzed …

Supporting Technology Of Roadway Crossing Fractured Zone Of Fault Under Dynamic And Static Load, Song Weihua, Di Chunlei, Deng Zhaorui

Coal Geology & Exploration

The gateway 5303 encountered multiple normal faults during the driving in Changping mine of Jinmei Group. For the purpose that the gateway can pass through the faults safely and rapidly and ensure applicative methods and scope of supporting. So based on the principle of maximum principal stress and fracture damage mechanics of rock, the paper analyzes the crushing mechanism of the normal fault zone under dynamic and static load from macroscopic and microscopic perspectives. Then, the plastic failure model of fault zone was established, the normal fault sliding mechanism and supporting theory were combined to derive the expression of the …

Comprehensive Evaluation Technology And Application Of Grouting Reinforcement Effect For Broken Coal And Rock Mass, Wang Xiaolei, Ji Zhigang, Luo Wenqiang

Coal Geology & Exploration

Grouting reinforcement of broken coal and rock mass plays an important role in controlling the stability of surrounding rocks, and the grouting effect detection is an important link to ensure the grouting engineering to meet the requirements. The evaluation index was quantitatively analyzed by slurry filling rate method, mechanical parameter method, segmented water injection method, geological radar method, drilling television method and core inspection method. The comprehensive evaluation form of grouting effect was put forward, and the application research was carried out. The results show:The rate of filling slurry and coring was more than 90%; After grouting, the compressive strength …

Deformation Characteristics And Support Timing Of Deep High Stress Roadway, Geng Weile, Dong Ziwen, Guo Shengli, Pi Zikun

Coal Geology & Exploration

The rock occurrence environment and structural characteristics determine its strength criteria, and affects the mechanical and deformation characteristics of surrounding rock. This paper relies on the deep replacement project of a mine in Yunnan, based on the rock strength criteria, and analyzes the mechanics and deformation characteristics of surrounding rock and the reasonable secondary support time of roadway to decrease the influence of the roadway support effect because of the obvious rheological properties present under high ground stress. The results showed that the min-average simulated deviations mf was generalized H-B criterion which was aimed at the sum of deviation absolute …

Answering Global Warming’S Hottest Debate: A Better Way To Tax Carbon, Saleh Husseini

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

Some of you are sick of hearing about it, some of you don’t really care, and the rest of you are probably the reason the first group is sick of hearing about it, but regardless of which category you fall into, one thing is certain: climate change is real and it’s already happening. With that said, I’m moving forward under the assumption that all of us here believe in science and understand this phenomenon to be largely a result of post-industrial anthropogenic activity. In which case, reducing our emissions is the only way to prevent climate change from becoming a …

Synthesis And Connection Of Iridium Hydrogen Evolution Catalyst To Chlorella Vulgaris Photosystem I For Light-Driven Hydrogen Evolution, Anna Ramirez

Honors Program Theses and Projects

Hydrogen gas has been shown to be a promising energy source as options other than fossil fuels are being looked at in the face of anthropogenic climate change. It is known that anthropogenic climate change is caused by the production of greenhouse gases being let into the atmosphere, specifically a common reason for this is the burning of fossil fuels for energy. The overall goal of this project is to design a biochemical hybrid system that will be used to make H 2 gas and does not require the use of fossil fuels. Burning hydrogen as fuel produces only water …

Neglecting A Wind Energy Portfolio Leaves Nebraska Behind Its Neighbors, Conner Vokoun

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

Nebraska is a state that prides itself on the productivity of our land. We dutifully don our foam corn hats at Memorial Stadium and boast that Nebraska beef is what’s for dinner. But Nebraska’s land holds an untapped resource that our neighboring states are taking advantage of: wind. Nebraska must adopt a renewable portfolio to double production of wind energy in our state over the next five years. A renewable portfolio is a regulation that sets a minimum amount of power that can be produced by renewable sources, such as solar, wind, and hydroelectric. Currently, Nebraska does not have any …

Subsidize Or Suffer, Dallas Smith

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

The standard for energy production and consumption in the US has historically been the use of coal or oil. In the earliest days of the industrial revolution, coal was king. For a society to achieve such a goal as the expansion and fortification of infrastructure, well, society as a whole, the means absolutely justify the ends. But what if the means of producing energy didn’t have to look like what they did over a hundred years ago? Well they don’t. The use of new renewable, sustainable energy could prove to be beneficial in many aspects, environmental health especially. By subsidizing …

Is More Investment Needed In Solar And Biogas Energy Sources In Rwanda?, Herve Christian Kabanda

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

The Rwanda Third National Communication Under the United Nations Framework Convention on Climate Change mentions that Green House Gas (GHG) emissions per capita increased from 532.39kg (2006) to 676.23kg (2015) with an annual increase of 2.46%. As of 2015, the dominant emissions are from agriculture (70.4%) followed by energy (20.11%). Urea application in agriculture have increased from 1,246,400 to 2,559,000 tons of CO2 eq. Charcoal or wood being the primary source for cooking; emissions from domestic energy use has increased from 626,800 to 741,400 tons of CO2 eq. If such trends continue severe health issues, deforestation, soil erosion and droughts …

People And Planet First—Time Permitting, Jennifer Gilbert

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

Is it just me or is there something about election time that makes politicians overly ambitious? The candidates for the 2020 presidential election are fighting to convince American voters they are the best choice. One of the most common tactics for accomplishing this is providing voters with an unattainable amount of promises for making our problems magically disappear. While these ambitions are “attention-grabbing” and somewhat successful in acquiring votes, so many of them go unaccomplished or un-addressed once the candidate enters the white house. No candidate, from any party, is immune to this infectious tendency that accompanies running a campaign. …

The Wind Energy Adaptation Of Nebraska, Samuel Bogert

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

The Wind Energy Adaptation of Nebraska

Today there are many things in the world that we rely on, heaters for warmth, cars for travel, and many other commodities that our way of living is dependent on. One of the most overlooked aspects of society is the need for power. Each and every American is dependent on power somehow, yet the vast majority of us do not think twice when flipping a switch. We all know that flipping a switch means the lights come on, when turning the ignition in our car we don’t think of the process behind the engine …

Making Renewables Profitable For Lincoln Electrical System, Jack Mensinger

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

The potential for Nebraska to integrate renewable energy sources, such as solar and wind, in a financially sustainable and profitable method, has been proposed and shot down. Too many Nebraskans continue to doubt and reject renewables due to the perception that they are too expensive and the continued cost over traditional energy sources are too high. Most of Nebraska’s energy comes from coal, (63%) as of 2018, with the remainder lying primarily in nuclear (15%), and wind (14%). With the innovations and adoption of renewables by other states, what is keeping Nebraskans from joining the renewable party? The primary reason …

Positive Points Of Bernie's Green New Deal, Bailey Mullins

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

The Green New Deal will help will create jobs in the energy market. Many people fear that the workers in the coal mines or oil plants will be out of job but this is actually false. The Green New Deal will create jobs in the energy market, all while switching our infrastructure to 100% renewable energy. The Green New Deal is the best way for our country to become more sustainable, modernize our energy infrastructure, and do it without costing americans jobs. First off the Green New Deal will create 20 million new job openings according to Bernie Sanders campaign …

Adaptation To Climate Change, Pascal Ntaganda

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

Climate is changing rapidly. Some scientists say that the effects are now irreversible. The foundation on which government organizations, some of them being the congress in the United States, is not strong enough to stop climate change. The fact that the approaches being taken target market-based situations, makes it inefficient. Governments create solutions to reduce the impacts, as they make sure that these activities do not affect their economies. The level at which effects of climate change threaten life and resources of a country, is what stimulates the economy to adapt to the strategies set to mitigate climate change. In …

Facts, Not Feelings, Gannon Rush

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

“The world is gonna end in 12 years if we don't address climate change and your biggest issue is how are we gonna pay for it? ” This is a direct quote from Alexandria Ocasio-Cortez, a sitting U.S. congresswoman. In the next few sentences, she also proceeds to say that climate change is “our generations World War II”. 70 million people died in World War II, not only is it doing disrespect to those who gave the ultimate sacrifice, but it is physically impossible to compare war to climate change. What she and others, such as Greta Thunberg and Al …

Wind Is The First Step To Winning, Martin Brannaman

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

Wind energy is the way of the future, and those who don’t have it will get left behind. Wind has already proven to be useful to countries in Europe, such as Denmark, Germany, and Spain. These countries are benefited from EU policy, to help alleviate some economic stress that might come from having diversified energy sources. This diversification of energy is good for countries economically and energy wise, allows them to not be too heavily reliant upon one source. This issue is clearly on display in America who is heavily reliant on oil and coal for example, the 1973 oil …

The Dirty Clean Fuel, Sawyer Krivanek

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

Hydraulic fracking began nearly 80 years ago and was initially headlined as a brand new, fuel efficient alternative to coal and oil. Natural gas has been disguised as a clean fuel, when in reality it is just another dirty, polluting, environmentally harmful fossil fuel. The detriments of fracking heavily outweigh the benefits, and it needs to be banned on public and private lands. Natural gas has been viewed as a cleaner alternative to coal and oil, so immediately fossil fuel industries took advantage of that narrative. Consumers, eager for cleaner alternatives, have been tricked into buying into the fracking fad. …

Don’T Give Up On Nuclear Energy, Daniel Gertner

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

The nuclear power plant failures at Three Mile Island and Chernobyl in the late 1970s and 1980s split Americans into two passionate camps. For some, nuclear plants posed serious threats to both environmental and national security, and, for others, nuclear energy remained the most viable path to clean, reliable power in the United States. But following the fervent debates of the late 20th century, the national conversation around nuclear power stagnated. A few ardent advocates and opponents notwithstanding, nuclear power left the public eye. Popular energy debates—especially among young people—now center around flashier topics like the Green New Deal, electric …

The Economics Of Residential Solar Panels: Comparing Tiered And Time Of Use Plans, Prashanth Nyer, Candace Ybarra, Jack B. Broughton

Business Faculty Articles and Research

This case study uses data from a Southern California Edison residential customer on a grandfathered tiered rate plan to investigate 1) whether it is economically beneficial for the customer to switch from a tiered-rate plan to a Time-of-Use (TOU) plan, 2) whether going solar now makes financial sense for new solar customers, 3) what level of usage offset (the percentage of the customer’s annual electricity consumption that is provided by the solar panels) would result in the maximum financial benefit for the customer under each of the many TOU plans, and 4) whether solar customers on TOU plans can save …

Multi-Point Flux Approximations Via The O-Method, Christen Leggett

Master's Theses

When an oil refining company is drilling for oil, much of the oil gets left behind after the first drilling. Enhanced oil recovery techniques can be used to recover more of that oil, but these methods are quite expensive. When a company is deciding if it is worth their time and money to use enhanced oil recovery methods, simulations can be used to model oil flow, showing the behavior and location of the oil. While methods do exist to model this flow, these methods are often very slow and inaccurate due to a large domain and wide variance in coefficients. …

Assessing The Limitations Of Integrating Energy And Environmental Standards Into Seaports Of Small Island Developing States, Matthew Kensen

World Maritime University Dissertations

No abstract provided.

Ship Energy Efficiency Management Plan : Analysis Of Biofouling Effect On Co2 Emission Performance Of Iraq Non-Trading Fleet, Oudah Salim Mohammed Ali Alshawi, Tsitskishvili Avtandil

World Maritime University Dissertations

No abstract provided.

Wind Propulsion Optimisation And Its Integration With Solar Power, Mphatso Nsanjama Nyanya, Huy Ba Vu

World Maritime University Dissertations

No abstract provided.

A Study Of National Laws Of Vietnam On Compensation For Ship-Source Oil Pollution, Mai Thanh Truc Nguyen

World Maritime University Dissertations

No abstract provided.

The Significance Of Marine Autonomous Surface Ships : Prospects To The Philippine Maritime Industry, Dennis A. Pandeagua

World Maritime University Dissertations

No abstract provided.

Environmental Regulation Of Emerging Offshore Oil And Gas Activities In Somalia, Abubakar Mohamud Abubakar

World Maritime University Dissertations

No abstract provided.

Marine Safety And Pollution Prevention From Oil Spills In The Arabian Gulf : A Comparative Study Of Applicable International And Regional Conventions, Khalid Rakan Aldosari

World Maritime University Dissertations

No abstract provided.

Fabrication And Characterization Of Electrical Energy Storage And Harvesting Energy Devices Using Gel Electrolytes, Belqasem Aljafari

USF Tampa Graduate Theses and Dissertations

Redox-active materials in the bulk of gel electrolytes are unquestionably holding the primary roles in developing energy harvesting and storage technology. Both technologies are necessary in order to cope with the current challenges of the environmental crises of global warming and finite non-renewable sources while the demand for energy modern societies have been speedily increased. One of the most challenges of making a hybrid device of energy conversion and storage is the cost of the fabrication process. Therefore, gel electrolyte-based materials with redox-active properties can potentially be a promising solution to improve the performance of electrochemical and photoelectrochemical devices for …

Can The Us And Europe Contain Russian Power In The European Energy Market? A Game Theoretic Approach, Jesse Richman, Nurullah Ayyilmaz

Political Science & Geography Faculty Publications

The Russian history of politicization of natural gas supplies led Europe to seek alternatives. US LNG is considered to be a viable alternative for Europe, which positioned the US as a strong competitor against Russia. In a game theoretic approach, we model this strategic decision-making process in simultaneous-move and sequential games. Our findings indicate a mixed strategy equilibrium: Europe cannot commit to diversify in the face of Russian advantages, and Russia cannot fully resist the temptation to politicize its supplies to Europe. The US might attempt to intervene in the European commitment problem through implementing sanctions on Russian gas sales. …