Physical Sciences and Mathematics Commons^™

Genetic Diversity Of Chamaecrista Fasciculata (Fabaceae) From The Usda Germplasm Collection, Erika Bueno, Ted Kisha, Sonja L. Maki, Eric J.B. Von Wettberg, Susan Singer

College of Agriculture and Life Sciences Faculty Publications

Objective: Chamaecrista fasciculata is a widespread annual legume across Eastern North America, with potential as a restoration planting, biofuel crop, and genetic model for non-papillinoid legumes. As a non-Papilinoid, C. fasciculata, belongs to the Caesalpiniod group in which nodulation likely arose independently of the nodulation in Papilinoid and Mimosoid legumes. Thus, C. fasciculata is an attractive model system for legume evolution. In this study, we describe population structure and genetic diversity among 32 USDA germplasm accessions of C. fasciculata using 317 AFLP markers developed from 12 primer pairs, to assess where geographically there is the most genetic variation. Results: We …

Systems Thinking As A Design Process, Elizabeth Lockwood

Systems Science Friday Noon Seminar Series

During my master’s degree I analyzed sustainable practices in the built environment. What came from that work was a deep level of understanding that the current practices and rating systems appeared to be technical approaches to a larger system at play. I realized I have a gift to see hidden connections and find links between systems. Currently I use systems mapping as part of the design process to unearth the hidden elements in a system. I believe it is important to understand where designers, clients and stakeholders can insert themselves into a system. Part of this understanding is having empathy …

Flowering Resources Distract Pollinators From Crops: Model Predictions From Landscape Simulations, Charlie C. Nicholson, Taylor H. Ricketts, Insu Koh, Henrik G. Smith, Eric V. Lonsdorf, Ola Olsson

Rubenstein School of Environment and Natural Resources Faculty Publications

Enhancing floral resources is a widely accepted strategy for supporting wild bees and promoting crop pollination. Planning effective enhancements can be informed with pollination service models, but these models should capture the behavioural and spatial dynamics of service-providing organisms. Model predictions, and hence management recommendations, are likely to be sensitive to these dynamics. We used two established models of pollinator foraging to investigate whether habitat enhancement improves crop visitation; whether this effect is influenced by pollinator foraging distance and landscape pattern; and whether behavioural detail improves model predictions. The more detailed central place foraging model better predicted variation in bee …

Food And Earth Systems: Priorities For Climate Change Adaptation And Mitigation For Agriculture And Food Systems, Ana Maria Loboguerrero, Bruce M. Campbell, Peter J.M. Cooper, James W. Hansen, Todd Rosenstock, Eva Wollenberg

Rubenstein School of Environment and Natural Resources Faculty Publications

Human activities and their relation with land, through agriculture and forestry, are significantly impacting Earth system functioning. Specifically, agriculture has increasingly become a key sector for adaptation and mitigation initiatives that address climate change and help ensure food security for a growing global population. Climate change and agricultural outcomes influence our ability to reach targets for at least seven of the 17 Sustainable Development Goals. By 2015, 103 nations had committed themselves to reduce greenhouse gas emissions from agriculture, while 102 countries had prioritized agriculture in their adaptation agenda. Adaptation and mitigation actions within agriculture still receive insufficient support across …

Gardening Resources, Center For Urban Resilience

Module 10: Garden Ecology

No abstract provided.

Sdstate Sustainability Newsletter: Vol. 3 Issue 4, Jennifer Mclaughlin

SD State Sustainability Newsletter

Sustainability Benchmark Report Submission Soon
SDState Participates in RecycleMania for Ninth Year
Sustainability Institute Coming in May
Volunteers Needed for Don't Dump! Donate!
Students Prepare for Second Annual "The BIG Event"
Mark Your Calendars for Upcoming Sustainability Events

Network Meta-Metrics: Using Evolutionary Computation To Identify Effective Indicators Of Epidemiological Vulnerability In A Livestock Production System Model, Serge Wiltshire, Asim Zia, Christopher Koliba, Gabriela Buccini, Eric Clark, Scott Merrill, Julie Smith, Susan Moegenburg

College of Agriculture and Life Sciences Faculty Publications

We developed an agent-based susceptible / infective model which simulates disease incursions in the hog production chain networks of three U.S. states. Agent parameters, contact network data, and epidemiological spread patterns are output after each model run. Key network metrics are then calculated, some of which pertain to overall network structure, and others to each node’s positionality within the network. We run statistical tests to evaluate the extent to which each network metric predicts epidemiological vulnerability, finding significant correlations in some cases, but no individual metric that serves as a reliable risk indicator. To investigate the complex interactions between network …

Umphlett Qci March 2019, Natalie Umphlett

High Plains Regional Climate Center: Personnel Publications

Highlights for the Basin

Temperature Anomalies

Plains Snowpack

Agriculture

Energy

Transportation

Temperature

Precipitation

A New Direction For Salinity Management In Western Australia: A Consultative Review, Ghd

Natural resources commissioned reports

In May 2018, the Office of the Auditor General (OAG) published an audit into the management of salinity and recommended that the Department of Primary Industries and Regional Development (DPIRD), in consultation with the Department of Biodiversity, Conservation and Attractions (DBCA) and the Department of Water and Environmental Regulation (DWER), set a strategic direction for salinity management for WA and improve monitoring, cooperation, coordination, promotion of soil conservation, and compliance of salinity impacts and its management.

The OAG’s audit focused on two questions:

1. Do agencies know the extent and impact of dryland salinity in the South West agricultural regions?
2. Are …

How Climate Change Is Driving Corporate Social Responsibility And Business Innovation, Faith Taylor

Sustainability Seminar Series

Climate Change continues to create ongoing challenges to companies, our communities and planet. Key stakeholders from employees to Investors request that we are all held accountable. Learn how companies have responded and the innovation that is driving change and hope for a better world. Be humbled, educated and inspired to make a difference.

Limits To The World’S Green Water Resources For Food, Feed, Fiber, Timber, And Bioenergy, Joep F. Schyns, Arjen Y. Hoekstra, Martijn J. Booij, Rick J. Hogeboom, Mesfin Mekonnen

Daugherty Water for Food Global Institute: Faculty Publications

Green water––rainfall over land that eventually flows back to the atmosphere as evapotranspiration––is the main source of water to produce food, feed, fiber, timber, and bioenergy. To understand how freshwater scarcity constrains production of these goods, we need to consider limits to the green water footprint (WFg), the green water flow allocated to human society. However, research traditionally focuses on scarcity of blue water––groundwater and surface water. Here we expand the debate on water scarcity by considering green water scarcity (WSg). At 5 × 5 arc-minute spatial resolution, we quantify WFg and the maximum sustainable level to this footprint (WFg,m), …

Fuzzy Random Optimization Of Generalized Kelvin Constitutive Model For Creep Of Artificial Freezing Clay, Yao Yafeng, Cheng Hua, Rong Chuanxin, Zhang Nan, Lin Jian

Coal Geology & Exploration

The constitutive model of freezing creep is one of the important reference data for shaft building using freezing method. Uniaxial creep tests under different stress levels were conducted for the artificial freezing clay at -5℃, -10℃, -15℃ and -20℃. So the changing rules of creep curves were obtained under the condition of different temperatures and different stress levels. On this basis, traditional Guess-Newton algorithm has been improved by fuzzy random iterative search and the of the fuzzy random Guess-Newton algorithm steps were obtained, then we use the improved algorithm to optimize the parameters of the generalized Kelvin constructive model, obtained …

Properties Of Mud Cake Associated With Silica Shale Powder Intrusion Into Drilling Fluid, Mo Dingqiang, Sun Pinghe, Zhao Binkui, Wang Jingyuan, Zhang Shaohe, Cao Han

Coal Geology & Exploration

Drilling fluid is very important for maintaining the stability of the hole wall in shale drilling. The mud cake formed by the fluid loss also plays a decisive role in protecting the reservoir. In order to study the influence of shale rock powder intrusion into low-solid-phase drilling fluids on the basic properties of mud cakes, the paper selects the siliceous shale powders in northwestern Hunan as the research object, and designs orthogonal experiments. In addition, the test results are analyzed using variance and range, which show that the content of rock powder is the main factor affecting the thickness of …

The Characteristics Of Organic Matter In Coal-Measure Source Rocks And Coal-Measure Gas Resource Potential In Eastern Henan Province, Yang Yanqing, Zhang Xiaodong, Xu Yakun, Zhang Peng, Wang Kun, Zhu Chunhui

Coal Geology & Exploration

In order to evaluate the hydrocarbon generation potential of coal-measure source rocks in eastern Henan Province, based on the measurement results of organic carbon content, vitrinite reflectance and the identification of maceral and type of kerogen in source rocks, the organic geochemical characteristics and the resource potential of coal-measure gas in different blocks of eastern Henan Province were comprehensively analyzed, and favorable blocks for coal-measure gas exploration were designated. The results show that the organic carbon mass fraction of coal-measure source rocks presents low as a whole(less than 1.5%). Kerogen in coal-measures source rocks is mainly of type Ⅲ and …

Numerical Analysis Of Temperature Field Of Underwater Dredging Artificial Frozen Plate, Wu Yuwei, Hu Jun, Wang Zhixin, Zeng Dongling, Wang Shucheng

Coal Geology & Exploration

In order to understand the development of the temperature field of artificial freeze dredging plates and the process of the formation of frozen curtains, the finite element analysis was used to perform numerical analysis using the single factor analysis method for research of the frozen process in different circumstances of geometric size of plate and physical environment of the soil under water. The results show that the correlation between the different geometric dimensions of the frozen plate and the dredging depth is weak, and the geometric dimension of the frozen plate can only change the area of dredging; for the …

Study On Pore Structure And Pressure-Sensitive Effect Of Tectonic Coal In Huaibei Xutuan Mine, Dong Kui, Jia Jiancheng, Gong Zewen, Wu Yan

Coal Geology & Exploration

In order to discuss pore structure and pressure-sensitive effect of tectonic coal, coal samples of Huaibei Xutuan mine were measured by optical microscope, scanning electron microscope, mercury injection, and triaxial servo-controlled seepage equipment for thermo-fluid-solid coupling to reveal the pore structure and the influence of effective stress on permeability or permeability coefficient of structural coal. The results show that cataclastic structure of tectonic coal is regular, flat and has good connectivity; the pores of primary coal are mainly composed of micropores, micropores and transitional pores are dominant in tectonic coal has. The effective stress of ductile deformed coal has a …

Preparation Of Polished Slice Of Special Coal And Its Influence On Coal Petrology Analysis, Liu Shande

Coal Geology & Exploration

Coal petrology analysis is widely used in coal facies research, geological exploration and coal blending test. Qualified polished coal slice is the premise of coal petrology analysis. In order to solve the preparation problem of special coal optical plates, such as brittle samples and aging coal optical plates, a complete preparation process was raised, and the feasibility of the process was verified. The results showed that R_max was very little affected by secondary preparation, but the maceral group composition content was significantly affected, and the fluctuation of the anthracite' microcomponent was the greatest. When the maceral group composition quantification …

Experimental Of Water Unlocking Stimulation Mechanism On Surfactant Fracturing Fluid, Song Jinxing, Yu Shiyao, Su Xianbo, Wang Qian

Coal Geology & Exploration

This paper presents an experimental study of water unlocking stimulation mechanism on surfactant fracturing fluid based on the measurements of surface tension, contact angle, gas-phase permeabilities and desorption of nitrogen on synthetic coal samples. The coking coal in Liulin zone of Hedong coal field was used as testing object in this study. Active water and surfactant fracturing fluids were used as testing liquids in this study. Results show that the surfactant fracturing fluid(1.5%KCl+0.05%AN) reduces the surface tension of active water fracturing fluid(1.5%KCl) and increases the wettabil-ity of active water fracturing fluid to coal reservoir; the surfactant fracturing fluid reduces the …

Reservoir-Forming Conditions Of Shale Gas In Badaowan Formation In Fukang Area, Xinjiang, Zhang Min, Li Xianqing, Zhang Jizhen, Sun Jie, Liang Wanle, Duan Zhiyou, Li Hanqing

Coal Geology & Exploration

In order to evaluate the potential of shale gas of coal measures in Fukang area, Xinjiang, taking the shale of Jurassic coal measures in Badaowan Formation as an example, the study was carried out and the favorable accumulation area for shale gas was preliminarily put forward according to the drilling, core data and sample analysis results in this paper. The result shows that the accumulative thickness of Jurassic Badaowan Formation shale is big(200-400 m), the buried depth is shallow(<1 500 m), the organic carbon content is high(average TOC>2.0%), mainly of type Ⅲ and Ⅱ2, thermal evolution level is moderate(R_ran is 0.8%-1.1%, mature), physical property of reservoir …

Method For Determination Of Measurent Time Of Resistivity Logging In Artificial Well Liquid, Wang Haijun, Ma Liang

Coal Geology & Exploration

In order to solve the problem of determining the most critical parameter of the logging time of artificial well fluid resistivity logging, and get rid of the method that depends on the construction experience for a long time, guide logging technicians to obtain reliable logging curves, from the factors influencing the measurement time, the mass conservation law was used to build the calculation model for the best measurement time of logging, the computational formula for the best measurement time was derived, which was verified through in-site contrast experiment of boreholes. The results show that the computational formula set up by …

Table Of Contents, The Editors

Coal Geology & Exploration

No abstract provided.

Progress In The Research On Drilling Technology And Equipment In Coal Mining Areas Of China, Li Quanxin, Shi Zhijun, Tian Hongliang, Yao Ke, Liu Jianlin, Yao Yafeng, Xu Chao, Fang Jun, Liu Fei

Coal Geology & Exploration

Drilling technology and equipment play a key role in coalbed methane(gas) development and ensuring coal mine safe production in coal mining areas. The complicated geological and mining conditions of coal seams in China determine that the drilling technology and equipment must be based on the basic situation of coal mining areas and take the way of independent innovation. The representative achievements of drilling technology and equipment in coal mining area during the Eleventh Five-Year Plan and the Twelfth Five-Year Plan were systematically summarized in this paper. Additionally, it presents comprehensive introduction to the great achievements of surface drilling and underground …

Research On Key Technology Of The 15 000 N·M High-Power Directional Drilling Rig, Fang Peng

Coal Geology & Exploration

According to the actual demand for ultra-long distance directional drilling in coal seam and large diameter directional drilling in seam roof, and the function of compound directional drilling technology for drilling rig, the technical idea of modular development for the functional development and design of high-power directional drilling rig are put forward. Combined with the contradiction among high-power matching, large capacity output and compact layout design of drilling rig, the key technologies of 15 000 N·m high-power directional drilling rig are researched in this paper, including overall layout design, large capacity rotary head design and layer board analysis, large opening …

Design Of Parameter Monitoring Software For Full Hydraulic Drilling Rig Based On Embedded Technology, Liao Jiangnan, Jiang Nan, Song Haitao, Dong Hongbo, Ma Bin

Coal Geology & Exploration

In order to reduce the development cost of the coal mine hydraulic drilling rig monitoring and diagnosis system, realize the versatility and portability of the monitoring and diagnosis system, and simplify the operation process, an embedded parameter monitoring software for the domestic mainstream full hydraulic drilling rig was designed. The software took STM32F407 microprocessor as the running environment and was developed in the environment of Visual Studio 2013 with C language. After completing GUI simulation on emWin Simulation, the software function verification experiment was carried out on the ZDY4000LR drilling rig. The experiment shows that the software ran stably and …

Trajectory Design Of Oblique Section In Nearly Horizontal Directional Hole In Inclined Formation In Underground Coal Mine, Zhang Yingjie, Zhao Yongzhe, Yang Zhong, Mo Haitao

Coal Geology & Exploration

Trajectory design of the near-horizontal directional drilling technology in underground coal mine is one of key aspects to successfully implement the technology. The trajectory of hole in a nearly horizontal formation is designed generally by two-dimensional method, and this method usually leads to the problem that the deflecting section of the hole travels out of the inclined target formation.Therefor, the calculation methods of the drilled formation true thickness were studied in the paper, the method using the unit normal vector of formation was proposed, and computation table in Excel was developed to guide trajectory design of near-horizontal directional drilling. The …

Geological Consideration For Site Selection Of Underground Coal Gasifier, Han Lei, Qin Yong, Wang Zuotang

Coal Geology & Exploration

Underground coal gasification(UCG) is a revolution in traditional coal mining technology, and the site selection of underground coal gasifier is a prerequisite for a successful UCG project. Refining and analyzing the previous research results, the principle of UCG and the geological controls of site selection of underground coal gasifier were reviewed. The results show that lignite is the most suitable for UCG. UCG should choose thickness greater than 2 m, angle is less than 70° and buried depth of coal seam is 300 to 2 000 meters. At the same time, the UCG process may pollute the groundwater, and the …

Fracture Extension Law Of Hydraulic Fracture In Coal With Different Structure, Jia Qifeng, Ni Xiaoming, Zhao Yongchao, Cao Yunxing

Coal Geology & Exploration

To find out the fracture extension law of coal hydraulic fracturing with different coal body structures can lay a foundation for reasonable well pattern deployment. Taking Shizhuang block of Qinshui basin as the research object, the fracture of coal core was observed, and four kinds of coal with fracture development degree were divided. Based on the theory of rock mass mechanics, the stress field calculation model of fracture tip and the judgment criterion of whether hydraulic fracture can pass through natural fracture in hydraulic fracturing process were established. According to the measured data of CBM wells, the reliability of theoretical …

Model Of Gas-Bearing Coal Permeability Prediction Based On Apso-Wls-Svm, Mao Zhiyong, Huang Chunjuan, Lu Shichang, Han Rongyue

Coal Geology & Exploration

In order to predict gas-bearing coal permeability accurately and prevent gas accidents effectively, a weighted least square support vector machine(WLS-SVM) algorithm based on Adaptive Particle Swarm Optimization(APSO) is proposed. Based on the related theory and literature research on gas-bearing coal permeability, the effective stress, gas pressure, temperature and compressive strength were selected as the main characteristic indexes. The APSO algorithm was used to optimize the combination parameters(C, σ) of the WLS-SVM model and APSO-WLS-SVM gas-bearing coal permeability prediction model was established. According to the field data, 40 sets of data were used as training samples and the remaining …

Data Modeling And Analysis Of Coal Resources Based On 3dmine Software, Liu Xiaoning, Luo Jinhui, Ma Xiaoli, Dong Zhibo

Coal Geology & Exploration

Taking No.3 coal in Gucheng coal mine, Shandong Province as the target, 3D coal seam entity models were built in 3DMine software, coaly quality indices' distributions were analyzed and coal reserve was calculated and compared to the reserve estimation in method of geological block. Firstly, a boreholes database is established using the geological data and borehole data of the target, and a 3D surface model of the coal seam with faults embedded was constructed. Then, the surface model was interpolated into an entity blocks model through the algorithm of inverse distance weighted(IDW) interpolation. Finally, the recoverable coal reserve of the …

Analysis Of Diffusion Properties Of Methane In Low Rank Coal, Meng Zhaoping, Zhang Guiyuan, Li Guoqing, Liu Jinrong

Coal Geology & Exploration

Diffusion properties of methane in coal is an important reservoir parameter affecting CBM production. Using the lignite samples from the Xiaolongtan Formation of the Miocene Neogene in southeastern Yunnan Province, the isothermal adsorption experiments of methane in low rank coal were carried out. Based on the relationship between adsorption amount and time obtained from isothermal adsorption experiment, the diffusion coefficient of methane in coal was calculated by using an unipore model of unsteady gas diffusion. The diffusion law of methane in coal and its control mechanism were revealed. The results show that gas diffusion law in coal obeys Langmuir equation; …