Physical Sciences and Mathematics Commons^™

Upper Cenomanian – Lower Turonian (Cretaceous) Calcareous Algae From The Eastern Desert Of Egypt: Taxonomy And Significance, Ioan I. Bucur, Emad Nagm, Markus Wilmsen

Studia UBB Geologia

An assemblage of calcareous algae (dasycladaleans and halimedaceans) is described from the Upper Cenomanian to Lower Turonian of the Galala and Maghra el Hadida formations (Wadi Araba, northern Eastern Desert, Egypt). The following taxa have been identified: Dissocladella sp., Neomeris mokragorensis RADOIČIĆ & SCHLAGINTWEIT 2007, Salpingoporella milovanovici RADOIČIĆ 1978, Trinocladus divnae RADOIČIĆ 2006, Trinocladus cf. radoicicae ELLIOTT 1968, and Halimeda cf. elliotti CONARD & RIOULT, 1977. Most of the species are recorded from the first time from Egypt. Three of the identified algae (T. divnae, S. milovanovici and H. elliotti) also occur in Cenomanian limestones of the Mirdita zone, Serbia, …

Investigations On Some Zeolitic Volcanic Tuffs From Cluj County (Romania), Used For Zinc Ions Removal From Aqueous Solution, Horea Bedelean, Andrada Maicaneanu, Silvia Burca, Maria Stanca

Studia UBB Geologia

Representative samples of zeolitic tuffs from Măcicaş, Aluniş and Apahida occurrences (Cluj County, Romania) were investigated using optical microscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD) and wet chemical analyses. The studied tuffs samples are mainly represented by vitric and vitric crystal varieties. The mineral assemblage suggests a rhyo-dacitic petrographic type of the volcanic tuff. Diagenetic alteration process in the pyroclastic sequence from this region led to the formation of zeolites, mainly clinoptilolite. The zeolitic tuffs under study can be used in wastewaters treatment to remove Zn2+ ions. Zn2+ removal was performed on some bulk samples: Aluniş (labelled A1), Apahida …

Managing The Geodiversity In Baia Mare Region: From The Scientific To The Public Interest, Alexandrina Fülöp, Marinel Kovacs

Studia UBB Geologia

The management of the geodiversity develops around the geological sites with scientific significance, which may be used for education. It is a key component of the natural resources in the Baia Mare region, which encompasses the Oaş and Gutâi Mts. and the adiacent Oaş, Maramureş and Baia Mare basins. After the decline of the mining-derived activities in the region, the development of the scientific and public interest on the geodiversity can be an alternative for the future. The scientific value of the geodiversity in the Baia Mare region is justified by the complex geology of the Neogene magmatic rocks and …

Do We Teach Disciplines Or Do We Teach Students?—What Difference Does It Make?, Marshall W. Gregory

Marshall W. Gregory

The single most difficult notion for graduate students and new professors to grasp about teaching--and, indeed, many experienced teachers never grasp this point either--is that successful teaching to undergraduates has little to do with the degree of one's mastery of disciplinary knowledge.

Somalian Immigration And Assimilation To Minnesota, Chantae Erickson

Academic Symposium of Undergraduate Scholarship

No abstract provided.

Difference Between The Second-Brewster And Pseudo-Brewster Angles When Polarized Light Is Reflected At A Dielectric–Conductor Interface, A. Alsamman, R. M.A. Azzam

Electrical Engineering Faculty Publications

For a given pseudo-Brewster angle ϕpB of minimum reflectance ∣∣rp∣∣ of p-polarized light at a dielectric-conductor interface, the second-Brewster angle ϕ2B of minimum reflectance ratio |ρ|=∣∣rp∣∣/|rs| of the p and s polarizations is determined for all possible values of the complex relative dielectric function ϵ that lead to the same ϕpB . The difference ϕ2B−ϕpB is considered as a function of ϕpB and θ=arg(ϵ) . For any given ϕpB , the difference ϕ2B−ϕpB=0 atθ=0(ϵr>0,ϵi=0) increases monotonically as a function of θ and reaches maximum value {ϕ2B−ϕpB}max in the limit as θ→180° (ϵr<0,ϵi=0) . This maximum difference {ϕ2B−ϕpB}max has an upper limit of 15.701° whenϕpB=28.195° .

The Runnins Report 2010

Watershed Access Lab Projects

Fall 2009 marks the second year that all 10th grade Biology II students and their teachers joined the watershed study project initiated by AP Biology students at Seekonk High School. Students traveled to 2 sites along the Runnins River: the Burr’s Pond site and an upstream site at the home of the Masons; to assess the health of the river at these sites. This highly successful venture allowed these students to relate ecological concepts to real, hands on research. Students, with the assistance of Kim McCoy, collected and filtered water grab samples, collected macroinvertebrate samples, took pictures of their classmates …

Smelt Brook: An Autumn Snapshot

Watershed Access Lab Projects

No abstract provided.

Abbott Run Annual Study 2010

Watershed Access Lab Projects

The purpose of our study was to make certain that Abbott Run met the standards of a Class A River. We are concerned that the Abbott Run remains a Class A river because it is the source of drinking water for Pawtucket, Rhode Island.

Abbott Run is located in the Western section of North Attleborough and is within the Blackstone River Watershed. Rhode Island to the West, and Plainville and North Attleborough to the South border the river. The Watershed section that is in North Attleborough is four square miles in size.

Land use is mostly single-family residential use except …

Norroway Pond: Conditions At Grove Street

Watershed Access Lab Projects

No abstract provided.

Furnace Brook Stream Profile

Watershed Access Lab Projects

No abstract provided.

Furnace Brook Water Quality

Watershed Access Lab Projects

No abstract provided.

Santuit Pond - An Environmental Analysis

Watershed Access Lab Projects

No abstract provided.

Hanson River Watch 2009-2010

Watershed Access Lab Projects

The Indian Head River is part of the large and complex system of streams and rivers, which contribute to the South Coastal Plain Watershed. A portion of the river forms the border to the Town of Hanson from where it flows into the main stem of the North River. Further upstream, the river is called the Drinkwater which itself drains into Factory Pond directly upstream of our study site A.

Historically the Indian Head, its headwaters and tributaries provided an important fishery for alewives, shad and rainbow smelt. However, the river suffered much the same as other river systems in …

The Mashpee River: Water Quality Index & Macroinvertebrates

Watershed Access Lab Projects

The Mashpee River is a short river, flowing only 5 miles before becoming tidal and draining into Popponesset Bay. In order to determine the overall water quality of our river, we ran tests on its levels of dissolved oxygen, BOD, temperature, pH, nitrates, phosphates, turbidity, and the presence of macroinvertebrates. A low level of dissolved oxygen is a sign of pollution, but our levels were better than ideal. Healthy pH levels for most fish fall between the values 5 and 9. Our pH levels were measured at around 6, well within the healthy range. Our river also maintained stable temperatures, …

Agawam River Project: Year 7

Watershed Access Lab Projects

No abstract provided.

Watershed Access Lab Program Overview - Spring 2010, Kim Mccoy

Watershed Access Lab Projects

Brief overview of the RiverNet Watershed Access program - its history and the achievements of the many participating teachers and students from throughout Southeastern Massachusetts.

Patterns In Fish Community Structure In A Regulated River, Richard Davis

Theses and Dissertations

I examined the abundance, composition, and distribution of fish communities in the lower Roanoke River, a hydropeaking system in North Carolina. Fishes were sampled at before and after peaking events over three years; 2007 to 2009. I evaluated trends in species richness, diversity, and assemblage composition. There were no significant differences in either richness or diversity suggesting consistent trends in richness and diversity throughout the study. I used non-metric multidimensional scaling (NMDS) to create a community composition model. Fish composition was noticeably greater post-peaking and changed minimally across time and event. There were no statistically significant differences in species composition …

Onset Of Rayleigh-Bénard Convection In Cylindrical Containers, Janet Scheel, Francois Herbert, Ryan Hufschmid, Guenter Ahlers

Janet D. Scheel

We determined the critical Rayleigh numbers Rac for the onset of convection in cylindrical containers with aspect ratios 1≲Γ≡D/L≲9 (D is the diameter and L the height) and the patterns that form just above Rac, both from experiment and by direct numerical simulation (DNS). Results for Rac agree well with the linear stability analysis by Buell and Catton for containers with finite sidewall conductivity. For Γ≤1.58±0.10, we found that the patterns correspond to an azimuthal Fourier mode with mode number m=1, corresponding to a single convection roll. For 1.58≲Γ≲3.26±0.02, the pattern was a concentric roll, corresponding to m=0. For 3.26≤Γ≲4, …

Capturing Genetic Variation During Ecological Restorations: An Example From Kankakee Sands In Indiana, Rebecca W. Dolan, Deborah L. Marr, Andrew Schnabel

Rebecca W. Dolan

Genetic variation in populations, both natural and restored, is usually considered crucial for response to short term environmental stresses and for long term evolutionary change. To have the best chance of successful long-term survival, restored populations should reflect the extant variation found in remnants, but restored sites may suffer from genetic bottlenecks as a result of founder effects. Kankakee Sands is a large-scale restoration being conducted by The Nature Conservancy (TNC) in northwestern Indiana. Our goal was to test for loss of genetic variation in restored plant populations by comparing them with TNC’s seed source nursery and with local remnant …

Capturing Genetic Variation During Ecological Restorations: An Example From Kankakee Sands In Indiana, Rebecca W. Dolan, Deborah L. Marr, Andrew Schnabel

Rebecca W. Dolan

Genetic variation in populations, both natural and restored, is usually considered crucial for response to short term environmental stresses and for long term evolutionary change. To have the best chance of successful long-term survival, restored populations should reflect the extant variation found in remnants, but restored sites may suffer from genetic bottlenecks as a result of founder effects. Kankakee Sands is a large-scale restoration being conducted by The Nature Conservancy (TNC) in northwestern Indiana. Our goal was to test for loss of genetic variation in restored plant populations by comparing them with TNC’s seed source nursery and with local remnant …

Projections And Idempotents With Fixed Diagonal And The Homotopy Problem For Unit Tight Frames, Julien Giol, Leonid V. Kovalev, David Larson, Nga Nguyen, James E. Tener

Mathematics - All Scholarship

We investigate the topological and metric structure of the set of idempotent operators and projections which have prescribed diagonal entries with respect to a fixed orthonormal basis of a Hilbert space. As an application, we settle some cases of conjectures of Larson, Dykema, and Strawn on the connectedness of the set of unit-norm tight frames.

Burr’S Pond And Runnins River: An Annual Watershed Survey, 2010

Watershed Access Lab Projects

AP Biology students at Seekonk High School are required to complete an independent research project to fulfill the Ecology unit of the course during the summer prior to the course. Students must apply what they learned in their readings to a local ecosystem, Burr’s Pond which is attached to the Runnins River. Students spend time at the pond area during the summer documenting organisms, evidence of population dynamics, animal behavior, trophic levels, nutrient cycling, etc. Students put together a Burr’s Pond Summer Field Research Project Portfolio to be submitted on the first day of school. Student projects are displayed at …

The Lick-Carnegie Exoplanet Survey: A Saturn-Mass Planet In The Habitable Zone Of The Nearby M4v Star Hip 57050, Nader Haghighipour, Steve Vogt, R. Paul Butler, Eugenio J. Rivera, Gregory Laughlin, Stefano Meschiari, Gregory W. Henry

Information Systems and Engineering Management Research Publications

Precision radial velocities (RV) from Keck/HIRES reveal a Saturn-mass planet orbiting the nearby M4V star HIP 57050. The planet has a minimum mass of Msin i ∼ 0.3 MJ, an orbital period of 41.4 days, and an orbital eccentricity of 0.31. V-band photometry reveals a clear stellar rotation signature of the host star with a period of 98 days, well separated from the period of the RV variations and reinforcing a Keplerian origin for the observed velocity variations. The orbital period of this planet corresponds to an orbit in the habitable zone of HIP 57050, with an expected planetary temperature …

2010 - The Fifteenth Annual Symposium Of Student Scholars

Symposium of Student Scholars Program Books

The full program book from the Fifteenth Annual Symposium of Student Scholars, held on April 27, 2010. Includes abstracts from the presentations and posters.

Mineralogical And Geochemical Indicators Of Subaerial Weathering In The Pozzolane Rosse Ignimbrite (Alban Hills Volcanic District, Italy), Jennifer M. Dickie

Geosciences Theses

The Pozzolane Rosse ignimbrite [PR] (457±4 ka) in the Alban Hills Volcanic District, Rome, Italy was exposed ~ 40 ka prior to a subsequent volcanic event which coverd it entirely. XRF, XRD, and clay separation results from PR samples from INGV and CA1 boreholes and Castel di Leva quarry show evidence of paleopedogenesis. All locations display loss of base cations, loss of K is consistent with XRD datat showing dissolution or alteration of leucite to analcime. Accumulation of Al and high L.O.I. support XRD evidence of 1:1 clay species at upper depth. Data suggest alteration extent can be determined by …

Censoring Maps In Google China? Visual Analysis Through Foucault't Power/Knowledge, Zhanar Karimbayeva

Geosciences Theses

This thesis explores aspects of map censorship in Google China through a theoretical framework based on Foucault’s power/knowledge. Comparing results of content analysis of maps in Google Ditu in Google China and Google Maps in Google Dot Com, the thesis analyzes the degree of censorship of maps in the Google geoweb. My findings are a higher density of labeling in Google Ditu in comparison with Google Maps, the absence of VGI in Google Ditu, the limitation of zoom level at Google Ditu, and the absence of Street View in China. This thesis suggests possible explanations to differences in map information …

Bifurcations Of Traveling Wave Solutions For An Integrable Equation, Jibin Li, Zhijun Qiao

School of Mathematical and Statistical Sciences Faculty Publications and Presentations

This paper deals with the following equation mt= 1/2 1/mk xxx− 1/2 1/mk x, which is proposed by Z. J. Qiao J. Math. Phys. 48, 082701 2007 and Qiao and Liu Chaos, Solitons Fractals 41, 587 2009. By adopting the phase analysis method of planar dynamical systems and the theory of the singular traveling wave systems to the traveling wave solutions of the equation, it is shown that for different k, the equation may have infinitely many solitary wave solutions, periodic wave solutions, kink/antikink wave solutions, cusped solitary wave solutions, and breaking loop solutions. We discuss in a detail the …

Optically Anisotropic Infinite Cylinder Above An Optically Anisotropic Half Space: Dispersion Interaction Of A Single-Walled Carbon Nanotube With A Substrate, Roger H. French

Faculty Scholarship

A complete form of the van der Waals dispersion interaction between an infinitely long anisotropic semiconducting/insulating thin cylinder and an anisotropic half space is derived for all separations between the cylinder and the half space. The derivation proceeds from the theory of dispersion interactions between two anisotropic infinite half spaces as formulated in Phys. Rev. A 71, 042102 (2005). The approach is valid in the retarded as well as nonretarded regimes of the interaction and is coupled with the recently evaluated ab initio dielectric response functions of various semiconducting/insulating single wall carbon nanotubes, enables the authors to evaluate the strength …

Thermal Shock Resistance Of A Kyanite-Based (Aluminosilicate) Ceramic, Nima Rahbar, B. Aduda, J. Zimba, S. Obwoya, F. Nyongesa, I. Yakub, W. Soboyejo

Nima Rahbar

This paper presents the results of a combined experimental and theoretical study of microstructure and thermal shock resistance of an aluminosilicate ceramic. Shock-induced crack growth is studied in sintered structures produced from powders with different particle size ranges. The underlying crack/microstructure interactions and toughening mechanisms are elucidated via scanning electron microscopy (SEM). The resulting crack-tip shielding levels (due to viscoelastic crack bridging) are estimated using fracture mechanics concepts. The implications of the