196,605 research outputs found
Biostratigraphy and Paleoenvironmental Reconstruction at the Gebel Nezzazat (Central Sinai, Egypt): A Paleocene Record for the Southern Tethys
No full textThe variations in assemblages of calcareous nannofossils are tracked in the Dakhla and Tarawan Formations exposed at Gebel Nezzazat (central Sinai, Egypt). Five calcareous nannofossil biozones, namely NP2/3, NP4, NP5, NP6, and NP7/8 are identified. A distinct marker bed related to the Latest Danian Event (LDE) occurs within the Dakhla Fm. The earliest representative of fasciculiths, Lithoptychius schmitzii, first occurs just below the LDE distinct bed and is followed by the Los of Diantholitha alata, D. mariposa, L. varolii, L. felis, and L. collaris. The abundance of calcareous nannofossils drops within the LDE distinctive bed. The base of Selandian Stage is here approximated at the base of Zone NP5 in concurrence with a sudden drop in the abundance of calcareous nannofossils. No considerable lithological changes are noted across this transition. The absence of subsequent occurrences of L. ulii, L. janii, L. billii, and L. stegostus suggest inconsistent lowest occurrences (Los) of these taxa, insufficient sampling resolution, and/or a hiatus. The base of Thanetian is approximated with the base of Zone NP7/8 in the topmost of Dakhla Fm. No considerable changes in calcareous nannofossil assemblages are associated in correspondence to this transition except the LO of D. mohleri, lowest continuous occurrence (LctO) of Bomolithus megastypus, and the increase in abundance of Heliolithus kleinpellii as well as a sudden drop in abundance within Zone NP7/8. The variations in calcareous nannofossil assemblages at Gebel Nezzazat suggest prevailing warm-water and oligotrophic conditions during the Paleocene and particularly along the Danian Stage that are interrupted by minor fluctuations in paleoclimatic conditions. In particular, the Danian–Selandian transition marks a decrease in warm and oligotrophic conditions that persisted along the Selandian Stage. The Selandian–Thanetian transition shows an increase of warm and oligotrophic conditions prevailed in the Thanetian record. The sudden decrease in abundance of calcareous nannofossils in both the Selandian and Thanetian is likely resulted from an increase in dissolution of carbonates rather than variations in the paleotemperature and/or paleofertility
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Dr. Glendon Swarthout
No full textHosted by Roger M. Busfield, MSU Assistant Professor of Speech and Theater, Meet the Author is designed to introduce a general audience to a contemporary author and their work through in-depth interviews. This episode features a conversation between Dr. Glendon Swarthout, prolific author and English professor at MSU, and assistant professors Sam S. Baskett and Theodore B. Strandness
Short wave–automated perimetry (SWAP) versus optical coherence tomography in early detection of glaucoma [Corrigendum]
No full textZaky AG, Yassin AT, El Sayid SH. Clin Ophthalmol. 2016;10:1819–1824. Page 1819, Abstract, Patients and methods, line 1, “In this randomized controlled, consecutive, prospective study” should read “In this non-randomized, controlled cross-sectional study”.Page 1820, left column, Patients and methods, line 1, “This consecutive prospective study” should read “This non-randomized, cross-sectional study”.Page 1820, left column, Patients and Methods, Exclusion criteria section, line 5, “pachymetry >480 μm or <540 μm” should read “pachymetry <480 μm or >540 μm”.Page 1821, left column, Results section, line 13, “RNFL thickness measured by OCT was outside normal limits in at least 1 hour in 7 eyes” should read “RNFL thickness measured by OCT was outside normal limits in 1 hour in 7 eyes”.Page 1821, right column, Results section, line 12, “RNFL thickness measured by OCT was outside normal limits in at least 1 hour in 9 eyes” should read “RNFL thickness measured by OCT was outside normal limits in 1 hour in 9 eyes”.Page 1821, Table 1 is incorrect, the correct Table is shown in the pdf below and the HTML. Read the original articl
Simulation of thermal plant optimization and hydraulic aspects of thermal distribution loops for large campuses
No full textFollowing an introduction, the author describes Texas A&M University and its utilities system. After that, the author presents how to construct simulation models for chilled water and heating hot water distribution systems. The simulation model was used in a $2.3 million Ross Street chilled water pipe replacement project at Texas A&M University. A second project conducted at the University of Texas at San Antonio was used as an example to demonstrate how to identify and design an optimal distribution system by using a simulation model. The author found that the minor losses of these closed loop thermal distribution systems are significantly higher than potable water distribution systems. In the second part of the report, the author presents the latest development of software called the Plant Optimization Program, which can simulate cogeneration plant operation, estimate its operation cost and provide optimized operation suggestions. The author also developed detailed simulation models for a gas turbine and heat recovery steam generator and identified significant potential savings. Finally, the author also used a steam turbine as an example to present a multi-regression method on constructing simulation models by using basic statistics and optimization algorithms. This report presents a survey of the author??s working experience at the Energy Systems Laboratory (ESL) at Texas A&M University during the period of January 2002 through March 2004. The purpose of the above work was to allow the author to become familiar with the practice of engineering. The result is that the author knows how to complete a project from start to finish and understands how both technical and nontechnical aspects of a project need to be considered in order to ensure a quality deliverable and bring a project to successful completion. This report concludes that the objectives of the internship were successfully accomplished and that the requirements for the degree of Degree of Engineering have been satisfied
Marine yeast isolation and industrial application
No full textOver the last century, terrestrial yeasts have been widely used in various industries, such as baking, brewing, wine, bioethanol and pharmaceutical protein production. However, only little attention has been given to marine yeasts. Recent research showed that marine yeasts have several unique and promising features over the terrestrial yeasts, for example higher osmosis tolerance, higher special chemical productivity and production of industrial enzymes. These indicate that marine yeasts have great potential to be applied in various industries. This review gathers the most recent techniques used for marine yeast isolation as well as the latest applications of marine yeast in bioethanol, pharmaceutical and enzyme production fields.
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Testing for the endogenous nature between women\u27s empowerment and antenatal health care utilization: Evidence from a cross-sectional study in Egypt
No full text© 2014 Hassan H. M. Zaky et al. Women\u27s relative lack of decision-making power and their unequal access to employment, finances, education, basic health care, and other resources are considered to be the root causes of their ill-health and that of their children. The main purpose of this paper is to examine the interactive relation between women\u27s empowerment and the use of maternal health care. Two model specifications are tested. One assumes no correlation between empowerment and antenatal care while the second specification allows for correlation. Both the univariate and the recursive bivariate probit models are tested. The data used in this study is EDHS 2008. Factor Analysis Technique is also used to construct some of the explanatory variables such as the availability and quality of health services indicators. The findings show that women\u27s empowerment and receiving regular antenatal care are simultaneously determined and the recursive bivariate probit is a better approximation to the relationship between them. Women\u27s empowerment has significant and positive impact on receiving regular antenatal care. The availability and quality of health services do significantly increase the likelihood of receiving regular antenatal care
Sintesis dan Karakterisasi Senyawa Kompleks dari Perak Nitrat dengan Ligan Campuran Tiourea dan Trifenilstibina
No full textABSTRAK Zaky, M. Faqihuddin. 2013. Sintesis dan Karakterisasi Senyawa Kompleks dari Perak Nitrat dengan Ligan Campuran Tiourea dan Trifenilstibina. Skripsi, Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Malang. Pembimbing: (1) Prof. Effendy, Ph.D. (2) Dr. Fariati, M.Sc. Kata-kata kunci: sintesis, kompleks perak nitrat, tiourea, trifenilstibina. Perak nitrat telah dilaporkan dapat membentuk senyawa kompleks dengan ligan campuran tiourea dan trifenilfosfina dengan stoikiometri 1 : 1 : 1. Kompleks yang dihasilkan adalah {[Ag(PPh3)(tu)]2(NO3)2.[Ag(PPh3)(tu)(NO3)]2}. Kisi kristal dari kompleks tersebut mengandung dua jenis kompleks dimer, yaitu dimer ionik [Ag(PPh3)(tu)]2(NO3)2 dan dimer molekuler [Ag(PPh3)(tu)(NO3)]2. Penelitian yang serupa yaitu dengan menggunakan trifenilstibina sebagai ganti trifenilfosfina belum dilaporkan. Trifenilstibina merupakan famili dari trifenilfosfina sehingga memungkinkan untuk membentuk senyawa kompleks dengan perak nitrat dan tiourea. Tujuan penelitian adalah untuk mensintesis senyawa kompleks dari perak nitrat dengan ligan tiourea dan trifenilstibina dan memprediksi strukturnya berdasarkan analisis EDX, HyperChem 8.0.3, dan daya hantar listrik (DHL). Senyawa kompleks disintesis melalui reaksi antara [Ag(µ-S-tu)](∞|∞)NO3 dan trifenilstibina dengan stoikiometri 1 : 1 dalam pelarut dimetilsulfoksida. Senyawa kompleks [Ag(µ-S-tu)](∞|∞)NO3 diperoleh dengan mereaksikan perak nitrat dalam pelarut asetonitril dan tiourea dalam pelarut metanol dengan stoikiometri 1 : 1. Senyawa kompleks hasil sintesis diukur titik leburnya dan dianalisis dengan EDX untuk memperoleh rumus empiris. Kemungkinan struktur yang didapat berdasarkan rumus empiris dianalisis dengan HyperChem 8.0.3 untuk menghitung energi bebasnya. Analisis daya hantar listrik dan uji kualitatif ion nitrat dilakukan untuk menentukan senyawa kompleks yang dihasilkan merupakan ionik atau molekuler. Sintesis yang dilakukan menghasilkan kristal senyawa kompleks yang tidak berwarna. Pengukuran titik lebur menunjukkan bahwa senyawa kompleks hasil sintesis adalah senyawa baru. Analisis EDX memberikan rumus empiris C55H49AgN3O3SSb3. Perhitungan energi bebas dengan HyperChem 8.0.3 menunjukkan bahwa semua struktur prediksi merupakan senyawa yang stabil. Pengukuran daya hantar listrik dan uji kualitatif ion nitrat memastikan bahwa senyawa kompleks hasil sintesis adalah kompleks molekuler. Struktur yang paling sesuai dengan senyawa kompleks hasil sintesis setelah dilakukan karakterisasi adalah [(Ph3Sb)3Ag(tu)NO3] dengan geometri trigonal bipiramidal terdistorsi di sekitar Ag(I). Penentuan struktur menggunakan difraksi sinar-X kristal tunggal diperlukan untuk memperoleh hasil yang lebih tepat
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