Physical Sciences and Mathematics Commons^™

Sensory And Motor Interdependence In Postural Adjustments, Gin Mccollum

Gin McCollum

The sensory reafference from a movement depends upon the movement, and the movement chosen depends upon the available senses, as demonstrated by vestibular patients who abandon certain movements. Often, one variable is assumed to be dependent whereas the other is independent; however, sensory and motor dynamics in posture are interdependent as conditions upon each other. This paper applies conditional dynamics to characterize the global structure of interdependence between sensory states and motor strategies in fast postural adjustments. The mathematical formalism incorporates rich but disparate experimental, clinical, and theoretical results about sensory and motor control of posture.

The control structures presented …

Finding And Characterizing Unstable Fixed Points By Controlling System Dynamics, Daniel Kaplan

Daniel T. Kaplan

No abstract provided.

The He-Lih Potential Energy Surface Revisited. I. An Interpolated Rigid Rotor Surface, Robert Hinde

Robert Hinde

We reconsider the potential energy surface of the He–LiH system recently examined by Gianturco and co-workers [F. A. Gianturco et al., Chem. Phys. 215, 227 (1997)]. We compute the He–LiH interaction energy at the CCSD(T) level using large correlation consistent atomic basis sets supplemented with bond functions. To capture the severe anisotropy of the He–LiH potential, we interpolate our ab initio points in the angular direction with cubic splines, then expand the splines in terms of Legendre polynomials. The resulting smooth potential surface differs substantially from that of Gianturco et al.; in particular, our attractive He–LiH well is more …

Extremal Graphs For Weights, Béla Bollobás, Paul Erdös, Amites Sarkar

Mathematics Faculty Publications

Given a graph G = (V,E) and α ∈ R, we write wα(G)=∑_xyϵEdG(x)^αdG(y)^α, and study the function w_α(m) = max {w_α(G): e(G) = m}. Answering a question from Bollobás and Erdös (Graphs of external weights, to appear), we determine w_i(m) for every m, and we also give bounds for the case α ≠ 1.

Taxonomic And Paelogeographic Approaches To The Dasyclad Algae In The Upper Jurassic (Kimmeridgian)-Upper Cretaceous (Cenomanian) Peritidal Carbonates Of The Fele (Yassıbel) Area (Western Taurides, Turkey), İsmai̇l Ömer Yilmaz

Turkish Journal of Earth Sciences

In the Fele (Yassıbel) area in the north of Beyşehir Lake in the Western Taurides, Upper Jurassic (Kimmeridgian) - Upper Cretaceous (Cenomanian) peritidal carbonates were studied in detail. In this study, 30 species of dasyclad algae were identified and 3 new Salpingoporella species were identified within the peritidal carbonates. It was determined that they belong to 13 different genera: Acroporella, Actinoporella, Campbelliella, Clypeina, Cylindroporella, Epimastopora, Epimastoporella, Kopetdagaria, Macroporella, Otternstella, Rajkaella, Salpingoporella, and Selliporella. Salpingoporella is the dominant genus. Some of the species are new records for Turkey: Clypeina nigra, Clypeina parasolkani, Otternstella lemmensis, Salpingoporella biokovensis, Salpingoporella circassa, Salpingoporella piriniae, and …

Clinopyroxene Compositions Of The Isotropic Gabbros From The Sarıkaraman Ophiolite: New Evidence On Supra-Subduction Zone Type Magma Genesis In Central Anatolia, Kenan M. Yaliniz, M. Cemal Göncüoğlu

Turkish Journal of Earth Sciences

The Sarıkaraman Ophiolite is one of the least dismembered ophiolitic units of the allochthonous Central Anatolian Ophiolites, which retains its recognizable pseudostratigraphy. The Sarıkaraman Ophiolite is represented in its lowermost part by isotropic gabbros. Within the isotropic gabbro sequence, clinopyroxenes are observed as small, colorless relicts with a cloudy appearance. In most of the samples, they are completely replaced by a successive generation of green to brown amphiboles. Clinopyroxenes display diopsitic to augitic compositions within the range of En 45 Fs 5 Wo 49 to En 50 Fs 9 Wo 41 . They are Ca-rich and Na-poor (Na 2 O

Field, Petrographic And Geochemical Features Of The Baranadağ Quartz Monzonite Of The Central Anatolian Granitoids, Turkey, Nurdan S. Aydin, A. Piril Önen

Turkish Journal of Earth Sciences

The Baranadağ quartz monzonite is one of the granitioid intrusions of the Central Anatolian Crystalline Complex (CACC) which represents the passive continental margin of the Anatolide-Tauride platform. Medium to coarse-grained Baranadağ quartz monzonites typically include mafic microgranular enclaves and K-feldspar megacrysts and are cut by aplitic dykes representing the youngest magmatic activity of the study area. The intrusion is mainly composed of orthoclase, plagioclase, quartz, hornblende, biotite and clinopyroxene. It displays a slightly alkaline character and relatively well-developed calc-alkaline trend. The metaluminous Baranadağ quartz monzonites show comparable field, petrographic and/or geochemical features with those of the H-type (Hybrid) granitoids of …

Biostratigraphic And Environmental Analysis Of The Upper Jurassic- Lower Cretaceous Carbonate Sequence In The Başoba Yayla Area (Trabzon, Ne Turkey), Kemal Tasli, Erol Özer, Cemi̇l Yilmaz

Turkish Journal of Earth Sciences

In the Başoba Yayla (Trabzon, NE Turkey) area, which is located in the Eastern Pontides northern zone, platform carbonates were deposited during the Late Jurassic-Early Cretaceous time in environments varying from intertidal/ supratidal to outer shelf. The carbonate sequence begins with a thick dolomite unit of the Late Jurassic to Early Cretaceous age. The following unit is rich in benthic foraminifers and pelecypoda shells. The foraminiferal assemblage comprising Vercorsella laurentii/camposaurii and Pseudolituonella gavonensis indicates a Late Hauterivian to Early Aptian age for this unit. The Late Aptian-Albian facies is characterized by bioclastic wackestones containing benthic foraminifers typical of outer platform …

Mafic Microgranular Enclaves In The Kozak Granodiorite, Western Anatolia, Cüneyt Akal, Cahi̇t Helvaci

Turkish Journal of Earth Sciences

Enclaves which are relicts of initial basic magma give important information on the origin and evolution of granitic magmas. The mafic microgranular enclaves from the l-type Kozak pluton are less than 1 m that are located at the margin of pluton and mostly less than 15 cm and are generally in sharp contact with the surrounding granodiorite. In some cases, several enclaves may occur close to each other, but they are not closely clustered to form swarms. Most of the enclaves are ellipsoidal in shape. The largest enclaves are less ellipsoidal with curved boundaries. The mafic microgranular enclaves contain same …

Rock-Forming Nannofossils In Uppermost Jurassic-Lowercretaceous Rock Units Of Northwest Anatolia: Nannoconusand Its Resived Taxonomy, Sevi̇nç Özkan Altiner

Turkish Journal of Earth Sciences

Nannoconids have been recorded in a rock-forming quantity in the uppermost Jurassic-Lower Cretaceous rock units in Northwest Anatolia, Turkey. Samples were collected from seventeen stratigraphic sections spanning the calciturbidities of the Yosunlukbayiri Formation and pelagic micrites of the Sogukçam Limestone. Because of rareness and difficulties for extracting of calcareous nannofossil species particularly zone markers in these type lithologies, nannoconids have particular attention in terms of biostratigraphy. Twenty nine species of nannoconids were recorded in the studied samples. Their taxonomy were revised and their stratigraphic ranges were given. The classification of genus Nannoconusis based on the gross morphology of the test, …

Deformation Of Stibnites And Pyrites In The Madsan Antimony Deposit (Niğde, Turkey): Implications For Pressure-Temperatureconditions Of Local Deformation, İlkay Kuşcu, Ayhan Erler

Turkish Journal of Earth Sciences

The Madsan antimony deposit at the southeastern part of the Niğde province (south-central Turkey) includes a series of epithermal veins hosted by marbles and gneisses. The veins have a simple mineralogy of quartz, calcite, stibnite and pyrite as major constituents, and cinnabar occurs in trace amounts. The deposit experienced a progressive deformation evidenced by a set of textures developed especially in stibnite and pyrite. These are pressure lamellae and annealing as the main textures, and curvature, off-set of pressure lamellae and fracture filling as the textures of minor importance. These were developed in three successive deformation phases. Pressure lamellae represent …

Geology Of The Dereiçi (Şavsat, Artvin) Cu-Pb-Zn Deposits, Mesut Soylu, Ayhan Erler

Turkish Journal of Earth Sciences

The geological relationships between the rock units in the Dereiçi/Şavsat (Artvin) region and vein-type Cu-Pb-Zn deposits were presented in this paper. The study area comprises the Upper Cretaceous intermediate volcanic rocks and sedimentary rocks, with Post-Eocene dykes of andesitic and diabasic composition. The mineral deposits are classified as (1) Sphalerite-Galena-Chalcopyrite-Pyrite veins (Talatin Madeni, Binektasi and Fikrinin Madeni), (2) milky quartz-Chalcopyrite-Sphalerite-Galena-Pyrite veins and (3) Chalcopyrite-Pyrite veins. The general paragenetic sequence of the mineralizations is observed as quartz I-pyrite-chalcopyrite-sphalerite-galena-quartz II-chalcocite-covellite. The wall rocks are subjected to silicification, sericitic alteration, chloritization and carbonatization.

Along-Strike Discontinuity Of Active Normal Faults And Its Influence On Quaternary Travertine Deposition; Examples From Western Turkey, Zi̇yadi̇n Çakir

Turkish Journal of Earth Sciences

Detail mapping of active fault zones bounding four travertine masses in the Gediz and Menderes grabens of western Turkey revealed that they are divided into geometric fault segments up to 13 km long. Fissures, supplying the carbonate-rich waters that give rise to the travertines are preferentially developed at the ends of the fault segments or in extensional step-over zones where the offset between the fault strands is about 1 km or more. The deposition of travertines in such structural settings is probably a consequence of the network of fissures supplying the carbonate-rich waters being highly interconnected where extensional strains were …

Use Of Engineering Geophysics In The Design Of Highway Passing Lanes, P. Michaels

CGISS Publications and Presentations

The addition of passing lanes has been a long standing need on Idaho Route 55. This narrow, winding road is one of the few routes that links Boise, Idaho, with destinations to the north. The roadway is bounded by a steep rising slope on the east, and a precipitous drop to the Payette River on the west. Additionally, the area is known for landslide hazards. Given these hazards and uncertainties in the subsurface geology, Idaho Transportation Department (ITD) commissioned an engineering geophysical survey to aid in the design of the passing lanes just south of Banks, Idaho.

The engineering design …

Boise Hydrogeophysical Research Site (Bhrs): Objectives, Design, Initial Geostatistical Results, Warren Barrash, Tom Clemo, Michael D. Knoll

CGISS Publications and Presentations

The Boise Hydrogeophysical Research Site (BHRS) is a wellfield developed in a shallow, coarse (cobble-and-sand), alluvial aquifer with the goal of developing cost-effective methods for quantitatively characterizing the distribution of permeability in heterogeneous aquifers using hydrologic and geophysical techniques. Responses to surface geophysical techniques (e.g., seismic, radar, transient electromagnetics) will be calibrated against a highly characterized control volume (the wellfield) with 3-D distributions of geologic, hydrologic, and geophysical properties determined from extensive field measurements. Also, these data sets will be used to investigate relationships between properties and to test petrophysical models. Well coring and construction methods, and the well arrangement …

Geophysical Surveys Across The Boise Hydrogeophysical Research Site To Determine Geophysical Parameters Of A Shallow, Alluvial Aquifer, William P. Clement, Michael D. Knoll, Lee M. Liberty, Paul R. Donaldson, Paul Michaels, Warren Barrash, John R. Pelton

CGISS Publications and Presentations

At the Boise Hydrogeophysical Research Site (BHRS), we are characterizing the hydrogeophysical parameters of a cobble-and-sand, unconfined aquifer using a wide variety of geophysical methods. Our goal is to develop methods for mapping variations in permeability by combining non-invasive geophysical data with hydrologic measurements. We are using seismic, ground penetrating radar, and electrical methods in a variety of configurations to provide images of and parameter distributions at the BHRS. Issues such as resolution, depth of penetration, and the ability to image the desired parameters will help determine the most effective methods. Supporting data sets from the BHRS include core analyses …

3‐D Gpr Imaging Of Complex Fluvial Stratigraphy At The Boise Hydrogeophysical Research Site, William R. Peretti, Michael D. Knoll, William P. Clement, Warren Barrash

CGISS Publications and Presentations

A series of three-dimensional (3-D) ground-penetrating radar (GPR) data sets were acquired over the central wellfield area at the Boise Hydrogeophysical Research Site (BHRS). The survey region is 30 m x 18 m and encompasses 13 wells. The goal of the surveys is to image the complex fluvial (cobble-and-sand) stratigraphy around the wellfield. These images will be used to construct 3-D models of the sedimentary architecture and to help constrain fine-scale models of hydrologic and geophysical parameters at the site. The data sets were acquired using 25 MHz, 50 MHz, 100 MHz and 200 MHz antennas. Depth of penetration ranges …

Brownfield Redevelopment Strategies For Gary, In,, Kirstin Toth, Donald T. Iannone

All Maxine Goodman Levin School of Urban Affairs Publications

The Great Lakes Environmental Finance Center conducted a technical assistance workshop for Gary, Indiana officials on June 29, 1999. This workshop represented an important step in the city’s efforts to address its brownfields cleanup and redevelopment needs. The city has begun its participation in a regionally-awarded brownfields pilot grant from the U.S. Environmental Protection Agency (EPA). The workshop agenda focused discussion on overcoming the barriers to brownfields redevelopment and the financing basics of brownfields redevelopment. These topics were discussed in the context of the redevelopment of the Airport Development Zone and a major area of Gary’s waterfront.

Title Page

Journal of Mathematics and Science: Collaborative Explorations

No abstract provided.

Challenges For Science And Mathematics Faculty, S. T. Thornton

Journal of Mathematics and Science: Collaborative Explorations

The increased science and mathematics teacher licensure requirements for K-8 teachers are clearly necessary to prepare teachers to appropriately teach the new Virginia SOLs [1]; The expectations of a program equivalent to 12 hours of science and 12 hours of mathematics for the PreK-6 endorsement and the 21 hours each of math and science to teach middle school math and science must be chosen very carefully indeed if future teachers are to be prepared to teach the specific SOL content, as well as "practical applications and the use of appropriate technology“. Most Virginia colleges and universities are not currently offering …

Title Page, Editor's Note

Journal of Mathematics and Science: Collaborative Explorations

No abstract provided.

Education School Challenges: The Increasing Demands On K-8 Teachers, A. J. Benson

Journal of Mathematics and Science: Collaborative Explorations

The educational needs of future K-8 teachers in the areas of mathematics and science are greater as a result of the increased (and, I would add, appropriate) student expectations in the area of mathematics and science as enunciated in the SOL and the specific content areas as described in the new licensure requirements. The sophistication and understanding of science and mathematics that is needed at both the elementary school and middle school levels is indeed substantial. However, proficiency in science and mathematics is only one portion of the total needs of new teachers. How are we all, from the Colleges …

Contents

Journal of Mathematics and Science: Collaborative Explorations

No abstract provided.

Virginia Commonwealth University's Program For K-6 And 6-8 Teachers: The Interdisciplinary B.S. In Science, R. W. Farley

Journal of Mathematics and Science: Collaborative Explorations

Virginia Commonwealth University (VCU) has very recently revised its requirements for the K-6 Certification to include a total of 21 hours in mathematics and science as well as a three credit hour methods course in mathematics and science. This requirement includes a physical science and a biological science course, each with a laboratory component, a contemporary mathematics course with extensive student projects, collaborative work and applications, a statistics course and interdisciplinary science and mathematics course. We believe that as students complete these requirements they will meet the new State K-6 licensure requirements in all areas, with the exception of geometry. …

Liberal Studies At Longwood College: Preparing Teachers For Virginia's Future, J. D. Smith

Journal of Mathematics and Science: Collaborative Explorations

The Liberal Studies Major provides future teachers studying at Longwood College with an excellent opportunity to prepare for all aspects of teaching in elementary school classrooms. In the area of mathematics and science, the Liberal Studies Major contains a total of 24 hours of mathematics and science, and prepares future K-6 classroom teachers to teach all components of the Virginia Standards of Learning (SOL) in these disciplines. Longwood College is currently studying how requirements can be modified within the Liberal Studies Program to make it possible for students to complete the discipline specific course work that will be necessary for …

Higher Education's Greatest Current Opportunity And Responsibility, R. F. Watson

Journal of Mathematics and Science: Collaborative Explorations

Preparing the next generation of teachers at all levels from kindergarten through college is higher education’s greatest current opportunity. Getting it right may be our greatest challenge. The face of science and technology is by definition changing constantly. Today, many feel that the most important work in science is going on increasingly at and across the interfaces of the traditional discipline. To serve our society well, education in the sciences, mathematics, engineering, and technology must change accordingly. In my view, curricula at all levels (K-16) too often continue to reflect only the narrow traditional disciplinary approaches that science has taken …

A New Interdisciplinary Mathematics And Science Course, P. E. Mcneil

Journal of Mathematics and Science: Collaborative Explorations

As Norfolk State University has been considering how to adequately prepare students to teach the challenging new mathematics and science called for the Virginia Standards of Learning [1], we have reached the conclusion that the student programs need to provide interdisciplinary experiences linking mathematics and science. We reached the conclusion for two reasons. First, even with the larger number of courses called for in the new licensure regulations, there are not enough course hours available to teach all of the different mathematics and science topics that future teachers need to have studied. Second, elementary and middle school students do not …

Scientists And The Science Educators: Collaborating To Develop Conceptual Change Teaching Strategies, G. E. Glasson

Journal of Mathematics and Science: Collaborative Explorations

Research in science education has identified conceptual change teaching strategies that may enhance pre-service teachers’ understanding of scientific concepts and processes. These strategies, supported by constructivist learning theory in the social and cognitive sciences, include the use of discrepant events to engage students’ prior knowledge, the learning cycle, and collaborative learning. Science educators have used these strategies to challenge alternative conceptions of pre-service K-8 teachers in methods courses in an effort to facilitate learning scientific concepts. Pre-service K-8 teachers, motivated to explore scientific phenomena and clarify their own understandings, gain confidence in their ability to learn science and are better …

A Preliminary Analysis Of The Supply And Demand For Middle School Mathematics And Science Teachers In Virginia, J. A. Sigler

Journal of Mathematics and Science: Collaborative Explorations

Virginia Colleges and Universities have a major challenge to produce educated elementary and middle school students. The magnitude of this challenge can be measured by studying the number of current teachers in each grade in Virginia and the anticipated retirements and departures from the profession for other reasons. The new licensure requirements have their biggest impact for the preparation of middle school teachers since middle school teachers will no longer be able to receive general middle school certification.

Teaching And Learning Seminar For Science And Mathematics Faculty, D. R. Sterling

Journal of Mathematics and Science: Collaborative Explorations

A yearlong seminar for science and mathematics faculty to investigate teaching and learning is in its second year at George Mason University in Fairfax, Virginia. This article describes the seminar and preliminary findings from the first year.