739 research outputs found
Dr. L.H. Whelchel, ITC, June 27, 2014
No full textThis video is a conversation with Dr. L.H. Whelchel. Dr. Whelchel talks about his book, "Sherman's March and the Emergence of the Independent Black Church Movement". Brad Ost, AUC Woodruff Library, is the interviewer
Dr. L.H. Whelchel, ITC, June 2011
No full textThis video is a conversation with Dr. L.H. Whelchel. Dr. Whelchel talks about his book, "The History and Heritage of African American Churches". Brad Ost, AUC Woodruff Library, is the interviewer
Proteomics as a tool to explore human milk in health and disease
No full textProteins in milk have wide range of functions, they are carriers of minerals or chemically vulnerable and insoluble vitamins and other compounds, stabilisers of large aggregates or micelles of lipids, and components of both innate and acquired immune defence systems. Together with other components of milk, proteins may also contribute to the selection and establishment of appropriate microbiome in the gut of the infant. The proteome of mammalian milk is now known to be dynamic and changes radically with time after birth from colostrum to mature lactation. Significantly, immune and innate defence proteins appear in milk during infection of the mammary gland and possibly also during systemic infections. The understanding of the human milk proteome and how it changes with time during lactation and in disease is developing rapidly, and is to a large extent informed by proteomics of the milks of non-human mammals, domestic animals in particular. We review general methods now being applied for proteomic analysis of human milk. Moreover we place emphasis on how the milk proteome may change in different ways in response to disease, mastitis in particular, how such changes may be specific to pathogen types, and we give some insights about evolution
Waves in oceanic and coastal waters: Observation techniques
No full textEmergency Notes CT5316: These notes have been taken from a draft manuscript “Waves in oceanic and coastal waters” by L.H. Holthuijsen to be published separately
Review about "Topological quantum information, Khovanov homology and the Jones polynomial" by Kauffman L.H.
No full textIn the paper under review the author gives a quantum statistical interpretation for the bracket and the Jones polynomial of a link
Interacting artificial surf reefs
No full textWave surfing is existing and becoming more attractive in the Netherlands. However natural wave conditions are not suited to encourage the sport. To improve the surf conditions of the local waves, Artificial Surf Reefs are potential solutions. As a part of intentions to optimise the design of Artificial Surf Reefs, this thesis is aimed at gaining insight into the wave-induced circulations and the wave-current interactions around an artificial reef. Impacts of the channel width on these processes were assessed by varying the width of the channel. Several surf-ability parameters were measured or observed to verify the performance of the proposed design. The surface currents on either side of the reef show a decrease in intensities and dimensions resulting in less intense wave-current interactions around the structure. It was found that rip currents with a Froude number smaller than 0.1 do not cause negative impact on the breaker shapes.Civil Engineering and Geoscience
袁桷作品對琴史的總體貢獻
No full textYuan Jue (1266-1327), courtesy name Bochang, pseudonym Qing Rong Jushi (Retired Scholar of Refined Demeanor), was one of the most distinguished scholars during Yuan dynasty, his biography record can be found in the 172nd chapter of the official biographies in the History of Yuan Dynasty. To understand Yuan Jue’s knowledge of Qin, is possible to refer to some of his works concerning different aspects of Qin tablatures, schools, masters of the Northern and Southern Song periods. Yuan Jue makes some special remarks on the original source of some melodies played during his own time, pointing out the effective contributions of some of the most relevant Qin masters during Southern Song Dynasty in the formation of the so-called Zhe School, underlining his doubts and believes, especially over master Yang Zuan, the author the Zi Xia Dong tablatures (now lost). According to Yuan Jue, some of the melodies collected in the Zi Xia Dong pu where not made Yang Zuan himself: after some comparisons, he discovered that the Cai Shi wunong (Five melodies by Cai [Yong]) were mostly identical to the same tablature transmitted by Zhang Yan from Southern Song Dynasty. The famous Qin player Guo Chuwang has been a hanger-on of Zhang Yan’s household; after receiving the tablatures collected by Zhang himself, he underwent a further reassembling and passed them down to later generations, till Yuan Jue’s days. Yuan Jue displays deep respect towards Zhang Yan and Guo Chuwang contributions (Yuan Jue also wrote two poems on Qin melodies written by Guo Chuwang), and the main aim of his texts on Qin is evidently to clarify and attest the real importance and influence of his past masters
Overtopping on Grass Covered Dikes: Resistance and Failure of the Inner Slopes
No full textA large part of the Vietnamese population is living close to the coast. The sea is an essential source for supporting lives. Coastal flooding, on the other hand, threatens the people, land and infrastructures every year. Some hundreds years ago, the first sea dikes were built in Thai Binh and Nam Dinh provinces. In the north, the coastline is now protected with more than 700 km of estuary and sea dikes. Being directly exposed to waves and currents, these dikes must be sufficiently stable and durable to function as coastal defences. The present thesis contributes to better understand how a dike performs under overtopping during a storm surge. The research limits itself to a slope that is covered with grass on the landward side. Therefore, this slope is mainly attacked by the overtopping flows. The research mainly explores four issues concerning a) damage pattern of grass dike slopes in Vietnam, b) how to quantify overtopping flows, c) how roots strengthen soil within a grass cover and d) classify and model damage to slopes due to overtopping. First, a wave overtopping simulator was used to test the strength of some grass covered slopes in Vietnam. The simulator was designed to generate overtopping flows at real dikes in normal weather conditions. The tested slopes could withstand a mean discharge varying from 20 to 100 l/s per metre of dike length during several hours. Damage usually starts at bare spots, at the inner toe, at the transition between different materials, and around objects (e.g., big trees). These features reduce the strength of a dike slope and therefore should be avoided as much as possible. Second, the thesis established formulas to quantitatively estimate overtopping flows. To this end, the research re-analysed an available set of data. The flow velocity and the water-layer thickness are related to the corresponding run-up level and overtopping volume. Within their ranges of application, the formulas can predict the flows in front of the simulator and on the dike slope relatively well. Third, the thesis investigated how roots strengthen soil on Vietnamese dike slopes. Measurements were carried out with four grasses Bermuda, Carpet, Ray and Vetiver to determine the diameter, the volume, the weight and the number of roots; and how strong they are. About 60 to 80% of roots have a diameter varying between 0.1 to 0.2mm. The volume, the weight are proportional to the number regardless of the size. About 60 to 90% of the root amount are present within the top 10 cm under the soil surface. There are less than 10% under 20 cm. A root thread can resist a pulling force of several Newton and this value often increases when grass becomes older. Formulas are developed to estimate the reinforcement to soil where roots are embedded in. The soil strength depends directly on the number (density) and the strength of roots. Fourth, the findings achieved earlier are integrated to investigate how a grass covered slope behaves when being attacked by overtopping flows. Based on the observations with the simulator tests, damage is classified into different manners depending on grass, material components and corresponding layer thickness. Erosion usually starts at weak spots so the thesis examined their spatial distribution along a dike stretch. The resistance of a grass cover can be estimated with two approaches. The first one assumes a critical velocity depending on the soil cohesion and the apparent cohesion induced by roots. The cover is damaged when the flow velocity exceeds the critical value. The second one solely considers a total tensile strength produced by the intact roots. The flows exert force to gradually break root by root, and the Root Bundle Model was developed to assess this process. Calculations show that older grass with a greater density and stronger threads of roots increases the resistance. By addressing these four issues above, the thesis has achieved its main research objective. By and large, it provides more profound insights into the damage of a grass covered slope due to overtopping. Besides, the study proves the potential strength of grass in protecting a dike slope. This strength would increase proportionally to the development of grass. Notably, a mean discharge appears to indicate partly the destructive effect of overtopping. Therefore, one should be aware of the simplification when using this value to design and appraise a sea dike. Last but not least, high dikes with no overtopping are expensive to obtain in developing countries like Vietnam due to the budgetary constraints. As a matter of fact, sea dikes might be lower and therefore cheaper when certain rates of water are allowed by taking into account the resistance of the applied grass.Hydraulic EngineeringCivil Engineering and Geoscience
AUC Author Series
No full textThe AUC Author Series is a production of the AUC Robert W. Woodruff Library librarians. The series began in 2011 when Dr. L.H. Whelchel of the Interdenominational Theological Center was interviewed about his newly published book, The History & Heritage of African-American Churches : A Way Out of No Way. Woodruff Librarians have since gone on to interview members from Clark Atlanta University, Morehouse College, Spelman College and the AUC Woodruff library. Our goal is to showcase, through video interviews with the creators themselves, the most important books, articles and other creative efforts produced by members of our Atlanta University Center community.
At the AUC Robert W. Woodruff Library we are always striving to improve our digital collections. We welcome additional information for any of the works in this collection. To submit information, please contact us at: [email protected]
Suggestions for improved control in cane sugarfactories
No full textElectrical Engineering, Mathematics and Computer Scienc
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