Engineering Commons^™

Underground Coal Gasification Field Tests In China: History And Prospects, Qin Yong, Yi Tongsheng, Yang Lei, Zhou Yongfeng, Wang Jun, Wang Lingxia

Coal Geology & Exploration

To achieve peak carbon dioxide emissions and carbon neutrality in China, a low-carbon and efficient coal energy structure is essential for the sustainable energy development of China. Underground coal gasification (UCG) is an important strategy for transforming the coal energy structure in China. Based on the review of previous literature, this study analyzes the exploration history of the UCG field tests in China and delivers the prospects of UCG industrialization in China. The analytical results show that the development and field tests of UCG technologies in China have experienced five stages, namely the initial attempt, silence/recovery, extensive explorations, making technological …

Enhancing The Battleverse: The People’S Liberation Army’S Digital Twin Strategy, Joshua Baughman

Military Cyber Affairs

No abstract provided.

Enter The Battleverse: China's Metaverse War, Josh Baughman

Military Cyber Affairs

No abstract provided.

Book Review: This Is How They Tell Me The World Ends: The Cyberweapons Arms Race (2020) By Nicole Perlroth, Amy C. Gaudion

Dickinson Law Review (2017-Present)

No abstract provided.

Distribution Characteristics And Paleo-Climatic Significance Of Continental Climate-Sensitive Sediments In The Late Cretaceous In China, Bin Xu, Fang Xiang, Shuxia Li

Coal Geology & Exploration

The Cretaceous is a typical period for studying the greenhouse climate and the earth system interactions, and the world's most extensive terrestrial strata are mainly in East Asia, especially in China. Continental sediments can effectively reflect the paleo-climate change, but the previous studies of the Late Cretaceous paleo-climate, based on the combined characteristics of continental climate-sensitive sediments, were barely found in China. To obtain the Late Cretaceous paleo-climate characteristics of China, the distribution characteristics of different continental climate-sensitive sediment types in the early, middle and Late Cretaceous in China were studied in detail. According to the distribution and combination characteristics …

International Analysis On The Traffic Impact Of The Covid-19 Pandemic, Fanny Margaretha Kristiansson

Doctoral Dissertations and Master's Theses

The purpose of this research was to assess, compare, and contrast the impact of COVID-19 activity restrictions on road-based transportation activity in regions of the US, Sweden, and China from January 1st to December 31st, 2020. Roadway traffic volumes were used to relate the progression of reported COVID-19 cases and government directives for social separation in three countries with diverse governmental responses.

Among the contributions of this paper was the illustration of the timeline and level of public responses to closures, lockdowns, and reopening as represented through rapid traffic decreases and increases. Traffic was greatly impacted, showing that the pandemic …

Alternate Warfare: The Unseen Weapons Of Mass Destruction, Elyse Keener

Liberty University Journal of Statesmanship & Public Policy

Biological warfare is a national security concern that transcends centuries. In the current international climate, biowarfare is of particular interest due to the COVID-19 pandemic. This article seeks to follow historical cases of biological warfare and international response to these cases in order to understand the implications of COVID-19, if it were to be weaponized. Also covered is the current capabilities that Russia, China, and Iran are assessed to possess.

Advances On Geological-Geochemical Research Of Coal-Type Uranium In China, Zhou Xianqing, Qin Yong, Lu Lu

Coal Geology & Exploration

There is a huge gap in uranium resources in China. Only developing traditional uranium resources is unable to meet the increasing demand in energy and national defense construction. The exploitation and utilization of coal-type uranium resources can relieve the pressure of demand for uranium resources to a certain extent. By summarizing the research results of coal-type uranium in recent years, the ore location, uranium content range, formation time and distribution range of coal-bearing strata of major coal-type uranium deposits in China, and the definition criteria of coal-type uranium are given, which provides a basis for the classification of coal-type uranium …

Measuring And Modeling Bare Desert Wind Erosion From Steppe Grassland Of Northern China As Affected By Soil Moisture And Climate, Nicholas Morgan Potter

Civil & Environmental Engineering Theses & Dissertations

Soil erosion by wind has been found to be negatively related to soil water content, as evidenced by that for a given area, such a soil erosion can be much less in a wet than a dry year. However, few studies have examined the functional relationship between wind erosion and soil moisture, primarily due to lack of field measured data. The objectives of this study were to: 1) measure wind erosion in field using a portable wind tunnel devised and made by the author; 2) use the measured data to calibrate/validate a wind erosion model previously developed by the author; …

Geopolitics Of Rare Earth Elements, Bert Chapman

Libraries Faculty and Staff Presentations

Rare earth elements (REE) contain unique chemical physical properties such as lanthamum, are found in small concentrations, need extensive precise properties to separate, and are critical components of modern technologies such as laser guidance systems, personal electronics such as IPhones, satellites, and military weapons systems as varied as Virginia-class fast attack submarines, DDG-51 Aegis destroyers, the F-35 Joint Strike Fighter, and precision guided munitions. The U.S. has some rare earth resources, but is heavily dependent on access to them from countries as varied as Afghanistan, Bolivia, and China. Losing access to these resources would have significant adverse economic, military, and …

Investigation Of Mimo Channel Characteristics In A Twosection Tunnel At 1.4725 Ghz, Rongchen Sun, David W. Matolak, Cheng Tao, Liu Liu, Zhenhui Tan, Tao Zhou

Faculty Publications

This paper presents results from a wide band single-input–single-output (SISO) and 16 16 virtual multiple-input–multiple-output (MIMO) measurement campaign at a center frequency of 1.4725 GHz in a 100-meter long tunnel laboratory which is terminated by a vertical wall with a metallic door. The path loss, root-mean-square delay spread (RMS-DS) characteristics, and power delay profiles (PDPs) are described. In addition, we provide results for the MIMO channel amplitude matrix, which offers a new perspective in understanding MIMO characteristics in tunnel scenarios. Our measurement results are analyzed and compared to ray tracing simulations. The relationships among the angle spread, channel matrix singular …

Artificial Islands In The South China Sea, Aaron Holmes

OSR Journal of Student Research

The purpose of this study was to understand the value and implications of artificial islands constructed by the People's Republic of China (PRC) in the South China Sea. Qualitative analysis was used with the available literature, sources, and treaties of the topics concerned. The paper concludes that the PRC gains many benefits primarily within the realm of energy security and explores what effects they may

Comparative Empirical Analysis On Computer Software Piracy Behaviors Between China And The United States: An Exploratory Study, Xiang Fang, Sooun Lee

Journal of International Technology and Information Management

Using the data collected from several universities in China and the United States, which have drastically different piracy rates, economic development stages, income levels, and national cultures, this study aims to identify which demographic factors affect software piracy significantly. Totally, the dataset includes 600 valid responses. Multivariate data analysis, supported by Multivariate Analysis of Variance and Turkey’s test, reveals that among various factors, country difference and gender most significantly influence software piracy. In addition, this study offers recommendations on how to curb software piracy effectively.

Estimated Grass Grazing Removal Rate In A Semiarid Eurasian Steppe Watershed As Influenced By Climate, Xixi Wang, Shohreh Pedram, Tingxi Liu, Ruizhong Gao, Fengling Li, Yanyun Luo

Civil & Environmental Engineering Faculty Publications

Grazing removal rate of grasses needs to be determined for various climate conditions to address eco-environmental concerns (e.g., desertification) related to steppe grassland degradation. The conventional approach, which requires survey data on animal species and heads as well as grass consumption per individual animal, is too costly and time-consuming to be applied at a watershed scale. The objective of this study was to present a new approach that can be used to estimate grazing removal rate with no requirement of animal-related data. The application of this new approach was demonstrated in a Eurasian semiarid typical-steppe watershed for an analysis period …

Corporate Social Responsibility And Performance: A Study Of A Chinese Industrial Development Zone, Chih-Chieh Chen, Yanxia Wang, Kuo-Chung Shang, Patricia Fosh, Chin-Shan Lu

Journal of Marine Science and Technology

This study was exploratory in nature; it was one of the first to investigate the relationship between corporate social responsibility (CSR) dimensions and firm performance in China. The authors undertook a questionnaire survey of firms located in the Chengdu Hi-tech Industrial Development Zone in Sichuan Province, China, in order to establish the link between managers' perception of their firms' adoption of corporate social responsibility and of their firm performance. Factor analysis demonstrated that the CSR activities or attributes adopted by firms could be grouped into three orientations: employee and consumer interests, community involvement, and disclosure. The 256 respondent firms were …

National Culture And Business Resilience: An Exploratory Study Of Two Chinese Construction Firms Operating In Singapore, Low Sui Pheng, Gao Shang, Teo Wee Kiat Ken

Business Review

The study of national culture focuses on differences in values and beliefs among people of different nationalities. With the increasing globalization of economies around the world, the construction industry is inherently exposed to risk at an unprecedented level. This is particularly true for Chinese construction firms, which are aggressively setting up subsidiaries and branches all around the world as they partake in large-scale complex projects overseas. With the liberal foreign trade policies adopted by China after its reforms, domestic construction firms in China also face immense pressure from the international players that are now able to enter the Chinese construction …

Social Media For Informal Science Learning In China: A Case Study, Ke Zhang, Fei Gao

Fei Gao

This article reports a case study on a popular informal science learning community via social media in China, named GuoKr (meaning “nutshell” in English). Data were collected through a variety of Chinese social media and social networking sites, web-based community portals, and discussion boards. Content analyses and data mining were conducted to investigate how GuoKr successfully attracted and engaged public in informal learning on scientific topics in particular. The study found three key characteristics that contributed to the success of such learning communities: (a) utilizing a variety of social media to empower participants with just-in-time, accidental learning opportunities; (b) daily …

Too Enthusiastic To Care For Safety: Present Status And Recent Developments Of Nanosafety In Asean Countries

Faculty of Engineering University of Malaya

Nanotechnology has the prospect to vibrate the imagination of human being and has the ability to be used in almost every sector of human need. With its limitless potentials, there are many environmental, health and safety related concerns due to extremely ambivalent effects of nanoparticles. Studies revealed that nanoparticles can enter the human body through the lungs, intestinal tract, and skin. Therefore, the researchers and workers who handle nanoparticles and nanomaterials can theoretically and primarily be affected, whereas on the consumers this will have secondary effects. This paper aims at sharing and evaluating the investment scenario, present status and recent …

A Comparison Of Float Ownership Issues For Construction Projects Between Taiwan And China, Ming-Teh Wang, Su-Ling Fan, Chi-Chen Tsai, Luh-Maan Chang

Journal of Marine Science and Technology

Float ownership is a controversial issue in construction projects. This study, which focuses on Taiwan and China, finds that attitudes regarding float ownership differ among stakeholders with different national and occupational backgrounds. To avoid disputes, practitioners should notice these differences before signing contracts. This study uses surveys to identify the potential differences in attitude regarding three important float ownership issues. The results vary from a previous study undertaken in the United Kingdom. The major findings of the study include: (1) contracts need to include clauses related to float ownership; (2) Taiwanese contractors and Chinese owners tend to view the float …

Spatio-Temporal Patterns Of Water Table And Vegetation Status Of A Deserted Area, Limin Duan, Tingxi Liu, Xixi Wang, Yanyun Luo

Civil & Environmental Engineering Faculty Publications

Understanding groundwater-vegetation interactions is crucial for sustaining fragile environments of desert areas such as the Horqin Sandy Land (HSL) in northern China. This study examined spatio-temporal variations in the water table and the associated vegetation status of a 9.71 km² area that contains meadowland, sandy dunes, and intermediate transitional zones. The depth of the water table and hydrometeorologic parameters were monitored and Landsat Thematic Mapper (TM) and Moderate Resolution Imaging Spectroradiometer (MODIS) data were utilized to assess the vegetation cover. Spatio-temporal variations over the six-year study period were examined and descriptive groundwater-vegetation associations developed by overlaying a water table …

Evaluation Of A Modified Monod Model For Predicting Algal Dynamics In Lake Tai, Jian Huang, Qiujin Xu, Xixi Wang, Beidou Xi, Keli Jia, Shouliang Huo, Hongliang Liu, Changyou Li, Bingbing Xu

Civil & Environmental Engineering Faculty Publications

Several modified versions of the Monod model have been proposed to simulate algal dynamics in lakes by keeping the parent model's advantages of simplicity and low data requirement. This study evaluated the performance of a widely-used modified Monod model in predicting algal dynamics at various time scales in Lake Tai, a typical shallow lake in east China, using multiple time series. Chlorophyll-a (Chl-a) concentration was used as a surrogate for algal (CyanoHABs: cyanobacterial harmful algal blooms) growth and the independent variables were total nitrogen (TN), total phosphorus (TP), and either water temperature or air temperature. The evaluation indicated that the …

Air Service Liberalization: China And Its Top Destinations, Tamilla Curtis, John Ledgerwood, Blaise Waguespack

Dr. Tamilla Curtis

Fatigue Strength Of End-Coped Crane Runway Girders, Xiaoli Tong, Christopher Tuan, Jianping Yang, Jiaqi Zhang, Qingrui Yue

Christopher Y. Tuan

Fatigue cracks were found on a series of end-coped crane runway girders after 14 years of service in a steel mill building in China. Two typical crane runway girders with different spans were studied in this paper. Finite element analyses were conducted to investigate the stress concentration at the coped ends. Analytical results showed the stress concentration effect was highly localized and the stress concentration factor decreased with increasing cope radius and decreasing total depth. The analytical results agreed well with the field measured data. Fatigue tests were conducted to determine the fatigue strength using eight 1/5-scaled end-coped girder specimens. …

Social Media For Informal Science Learning In China: A Case Study, Ke Zhang, Fei Gao

Visual Communications and Technology Education Faculty Publications

This article reports a case study on a popular informal science learning community via social media in China, named GuoKr (meaning “nutshell” in English). Data were collected through a variety of Chinese social media and social networking sites, web-based community portals, and discussion boards. Content analyses and data mining were conducted to investigate how GuoKr successfully attracted and engaged public in informal learning on scientific topics in particular. The study found three key characteristics that contributed to the success of such learning communities: (a) utilizing a variety of social media to empower participants with just-in-time, accidental learning opportunities; (b) daily …

Health Hazards Of China’S Lead-Acid Battery Industry: A Review Of Its Market Drivers, Production Processes, And Health Impacts, Tsering Jan Van Der Kuijp, Lei Huang, Christopher R. Cherry

Lei Huang

Despite China’s leaded gasoline phase out in 2000, the continued high rates of lead poisoning found in children’s blood lead levels reflect the need for identifying and controlling other sources of lead pollution. From 2001 to 2007, 24% of children in China studied (N = 94,778) were lead poisoned with levels exceeding 100 μg/L. These levels stand well above the global average of 16%. These trends reveal that China still faces significant public health challenges, with millions of children currently at risk of lead poisoning. The unprecedented growth of China’s lead-acid battery industry from the electric bike, automotive, and photovoltaic …

Health Hazards Of China’S Lead-Acid Battery Industry: A Review Of Its Market Drivers, Production Processes, And Health Impacts, Tsering Jan Van Der Kuijp, Lei Huang, Christopher R. Cherry

Faculty Publications and Other Works -- Civil & Environmental Engineering

Despite China’s leaded gasoline phase out in 2000, the continued high rates of lead poisoning found in children’s blood lead levels reflect the need for identifying and controlling other sources of lead pollution. From 2001 to 2007, 24% of children in China studied (N = 94,778) were lead poisoned with levels exceeding 100 μg/L. These levels stand well above the global average of 16%. These trends reveal that China still faces significant public health challenges, with millions of children currently at risk of lead poisoning. The unprecedented growth of China’s lead-acid battery industry from the electric bike, automotive, and photovoltaic …

Do We Have The Reliable Data? An Exploration Of Data Quality For Aids Information System In China, Hong Chen, Ping Yu, Ning Wang

Faculty of Engineering and Information Sciences - Papers: Part A

A national AIDS program evaluation system has been applied to the ranking of the performance of involved public health organizations in China since 2007. The system provides quantitative performance comparison information based on automatic mining of the data stored in a unified web-based national information system, China AIDS Comprehensive Response Information Management System (the CRIMS). Hence, the quality of the AIDS program evaluation system is directly related to the data quality in the CRIMS. This study aims to evaluate the performance of the AIDS program evaluation system. The research method is qualitative interview of public health practitioners in Jiangxi Province. …

Analysis - Toward A New American Military., Adam Lowther, Jan Kallberg

Jan Kallberg

In releasing the United States Department of Defense’s (DoD) Sustaining U.S. Global Leadership: Priorities for 21st Century Defense and Defense Budget Priorities and Choices in January 2012, President Barack Obama and Secretary of Defense Leon Panetta offered a rationale for the administration’s reductions in defense spending. By stating that the shift in strategic direction is an effort to “put our fiscal house in order” and a response to the 2011 Budget Control Act, which requires DoD to reduce spending by $487 billion between fiscal years 2012 and 2021, the United States’ NATO partners in Europe were given considerable reason for …

Practice And Prospects Of Fully Mechanized Mining Technology For Thin Coal Seams In China, F Wang, S Tu, Qingsheng Bai

Faculty of Engineering - Papers (Archive)

In China, thin coal seams are rich in resources but are technically challenging. The mineable reserves in these seams account for 20.4% of the total coal resources, while the current production accounts for only 10.4% of the total annual production. Characteristics such as narrow mining space, low level of mechanization, poor working environment, and high cost of mining, restrict the development of mining safety and efficiency. Recently, fully mechanized mining technology has developed rapidly for thin coal seams, the level of yield and efficiency has reached or exceeded the international standard, and some state-owned key coal mines are considering automation …

Evolutionary Algorithm For Water Storage Forecasting Response To Climate Change With Small Data Sets: The Wolonghu Wetland, China, Qingwei Ni, Li Wang, Binghui Zheng, Muttucumaru Sivakumar

Faculty of Engineering - Papers (Archive)

"A novel genetic programming (GP) technique, a new method of evolutionary algorithms, was applied to a small data set to predict the water storage of Wolonghu wetland in response to the climate change in the northeastern part of China. Fourteen years (1993-2006) of annual water storage and climatic data of the wetland were used for model training and testing. Results of simulations and predictions illustrate a good fit between calculated water storage and observed values (mean absolute percent error = 9.47, r = 0.99). By comparison, a multilayer perceptron method (a popular artificial neural network model) and Grey theory model …