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2006

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Articles 1261 - 1290 of 5872

Full-Text Articles in Physical Sciences and Mathematics

Investigations On Electrochemical Characteristics Of Liv_(3)O_(8) Electrode In Lithium Sulfate-Water-Ethanol Electrolytes, An-Bao Yuan Aug 2006

Investigations On Electrochemical Characteristics Of Liv_(3)O_(8) Electrode In Lithium Sulfate-Water-Ethanol Electrolytes, An-Bao Yuan

Journal of Electrochemistry

The active material of LiV_(3)O_(8)prepared using low-temperature pre-reaction in solution followed by intermediate-temperature calcination at 450 ℃.The product was characterized by X-ray diffraction analysis and scanning electron microscope observation.The performance of LiV_(3)O_(8) electrode in neutral lithium sulfate-water-ethanol electrolytes was investigated using electrochemical methods.Galvanostatic charge/discharge results indicated that the specific capacity of LiV_(3)O_(8) electrode decreases with ethanol content increasing in electrolyte.The most appropriate water/ethanol volumetric ratio is 4 ∶1 in terms of conductivity of the electrolyte and stability of the electrode.AC impedance measurements demonstrated that the ohmic resistance of the electrolyte as well as the charge transfer resistance of the electrode/electrolyte …

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Degradation Of P-Nitrophenol Wastewater By Liquid Phase Catalyzed In Bipolar Liquid Bed Cell, Shi-Yuan Guo Aug 2006

Degradation Of P-Nitrophenol Wastewater By Liquid Phase Catalyzed In Bipolar Liquid Bed Cell, Shi-Yuan Guo

Journal of Electrochemistry

This investigation was performed to study the degradation of p-nitrophenol(PNP) in the bipolar liquid bed cell catalyzed by liquid phase.The hydrogen peroxide produced on cathodes with the ferrous generated Fenton's reagent to produce hydroxyl radicals which are very active toward organic compounds to strengthen bipolar liquid bed cell in disposing organic compounds.The effects of cell voltage,ferrous concentration and airflow on the COD and PNP removal efficiency were also studied.When pH=3.0,cell voltage is 30V,ferrous concentration is 500×10~(-6) and airflow is 0.4 m~(3)/h,higher removal efficiency of the COD and PNP are obtained.

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Investigation On The Resistance To Electrochemical Oxidation Of Carbon Nanotubes With Various Diameters, Yu-Yan Shao, Ge-Ping Yin, Yun-Zhi Gao, Peng-Fei Shi Aug 2006

Investigation On The Resistance To Electrochemical Oxidation Of Carbon Nanotubes With Various Diameters, Yu-Yan Shao, Ge-Ping Yin, Yun-Zhi Gao, Peng-Fei Shi

Journal of Electrochemistry

The resistance to electrochemical oxidation of multi-wall carbon nanotubes(CNT) with various diameters is investigated by applying a fixed potential of 1.2 V(RHE) for 120 h in 0.5 mol L~(-1) H_(2)SO_(4).The oxidation current of CNTs decreases with their diameters,but CNTs between 10~20 nm in diameter(D1020) shows the lowest oxidation current.XPS analysis shows that,after oxidation,the increase in surface oxygen for D1020 is the smallest,implying that the oxidation degree for D1020 is the lowest.The conclusion can be reached that CNTs between 10~20 nm in diameter are the most resistant to electrochemical oxidation.The difference in electrochemical stability of CNTs is attributed to the difference …

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Immobilization Of Cytochrome C On The Surface Of Single-Wall Carbon Nanotube And Its Direct Electron Transfer And Electrocatalysis, Ya-Jing Yin, Ya-Fen Lv, Ping Wu, Pan Du, Yan-Mao Shi, Chen-Xin Cai Aug 2006

Immobilization Of Cytochrome C On The Surface Of Single-Wall Carbon Nanotube And Its Direct Electron Transfer And Electrocatalysis, Ya-Jing Yin, Ya-Fen Lv, Ping Wu, Pan Du, Yan-Mao Shi, Chen-Xin Cai

Journal of Electrochemistry

Cytochrome c(Cyto c) was immobilized on the surface of the single-wall carbon nanotube(SWNT) by using the method of adsorption.Infrared spectroscopy indicated that the Cyto c remained in its original structure and did not undergo structural change after its immobilization on the SWNT.The direct electrochemistry of cyto c,which was adsorbed on the surface of the SWNT,was studied by cyclic voltammetry.The voltammetric results demonstrated that the SWNT had promoting effects on the direct electron transfer of Cyto c and also indicated that the immobilized Cyto c retained its bioelectrocatalytic activity to the reduction of H_(2)O_(2).This modified electrode might be used in development …

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Voltammetric Behavior And Its Determination Of Acetaminophen At Poly (Congo Red) Modified Electrode, Hong-Bin Luo, Ya-Feng Zhang, Wei Chen, Xin-Hua Lin Aug 2006

Voltammetric Behavior And Its Determination Of Acetaminophen At Poly (Congo Red) Modified Electrode, Hong-Bin Luo, Ya-Feng Zhang, Wei Chen, Xin-Hua Lin

Journal of Electrochemistry

Cyclic voltammetry was used to prepare poly(Congo Red) film on glassy carbon electrode and to study the electrochemical behavior of acetaminophen on poly(congo red) modified electrode.Experimental resultal shows that the poly(congo red) modified electrode exhibits excellent electrocatalytic effect on the oxidation of acetaminophen.The peak currents of linear sweep voltammogram are linear to the acetaminophen concentrations over the range of 2.0×10~(-7) ～2.0×10~(-6) mol·L~(-1).The detection limit has been estimated to be 4.0×10~(-8) mol·L~(-1).This method can be used for the determination of acetaminophenin real sample.

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Electrochemical Behavior Of Electrolytic Manganese Dioxide In Mgso_(4) Solution, Dan-Mei Yu, Yu-Jun Si, Chang-Guo Chen, Yu-Ping Liu, Yan Liu Aug 2006

Electrochemical Behavior Of Electrolytic Manganese Dioxide In Mgso_(4) Solution, Dan-Mei Yu, Yu-Jun Si, Chang-Guo Chen, Yu-Ping Liu, Yan Liu

Journal of Electrochemistry

The rechargeability and crystal structure changing of electrolytic manganese dioxide(EMD) in MgSO_(4) electrolyte were investigated by cyclic voltammetry,galvanostatic charge/discharge and X-ray diffraction.The results have shown that the EMD has good rechargeability;after several initial cycles,the charge and discharge became stability;after discharge,the γ-MnO_(2) structure of EMD was changed,the production was reversible and could be recharged to γ-MnO_(2) structure again which ensured the rechargeability of EMD.

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Sound Absorption And Sound Power Measurements In Reverberation Chambers Using Energy Density Methods, David B. Nutter Aug 2006

Sound Absorption And Sound Power Measurements In Reverberation Chambers Using Energy Density Methods, David B. Nutter

Theses and Dissertations

Measurements in a reverberation chamber use spatially averaged squared pressure to calculate sound absorption, sound power, and other sound measurements. While a reverberation chamber provides an approximation of a diffuse sound field, variations in the measurements introduce uncertainty in measurement results. Room qualification procedures require a sufficient number of source-receiver locations to obtain suitable measurements. The total acoustic energy density provides greater spatial uniformity than squared pressure, which requires fewer source-receiver positions to produce similar or better accuracy in measurement results. This paper explores the possibility of using energy density in place of squared pressure, using methods outlined in current …

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Nanostructured Bi2se3 Films And Their Thermoelectric Transport Properties., Xiaofeng Qiu, Leah Austin, Philip Muscarella, Jeffrey Dyck, Clemens Burda Aug 2006

Nanostructured Bi2se3 Films And Their Thermoelectric Transport Properties., Xiaofeng Qiu, Leah Austin, Philip Muscarella, Jeffrey Dyck, Clemens Burda

Jeffrey Dyck

No abstract provided.

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Evaluation Of Voip Technologies As A Replacement For Traditional Pstn Based Pbx Systems, Albert Culleton Aug 2006

Evaluation Of Voip Technologies As A Replacement For Traditional Pstn Based Pbx Systems, Albert Culleton

Regis University Student Publications (comprehensive collection)

This project deals with a company in the SME sector with offices located in the midlands of Ireland. The company is well established in the field of Agri-Feed Manufacturing Process Control Systems or SCADA systems, and has been established for over 20 years. The communications requirements of the company have changed over these 20 plus years to a mix of various technologies from PSTN lines to Broadband ADSL. The present telephone system has been in use since 1991 and has several questions marks over it in terms of usage costs, usage reporting, support and maintenance and features available. This project …

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Sinkhole Structure Imaging In Covered Karst Terrain, Sarah E. Kruse, M. Grasmueck, Matthew Weiss, D. Viggiano Aug 2006

Sinkhole Structure Imaging In Covered Karst Terrain, Sarah E. Kruse, M. Grasmueck, Matthew Weiss, D. Viggiano

Geology Faculty Publications

Ground penetrating radar (GPR) and resistivity techniques have been widely used to map the locations of sinkholes in covered karst terrain. To determine whether a sinkhole is a likely preferential conduit for groundwater flow, however, requires higher-resolution imaging than that used in conventional sinkhole mapping surveys. Field observations combined with simulated surveys for a 15-m diameter 3-m deep sinkhole in west-central Florida are used to assess the resolution of GPR and resistivity surveys targeting the semiconfining unit that floors the sinkhole depression. 2D resistivity surveys clearly show the central depression as well as resistivity contrasts between the cover sediments within …

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Landscape Use And Movements Of Wolves In Relation To Livestock In A Wildland–Agriculture Matrix, Andreas S. Chavez, Eric M. Gese Aug 2006

Landscape Use And Movements Of Wolves In Relation To Livestock In A Wildland–Agriculture Matrix, Andreas S. Chavez, Eric M. Gese

United States Department of Agriculture Wildlife Services: Staff Publications

Wolves (Canis lupus) have expanded their distribution into areas of the midwest United States that have not had wolves for several decades. With recolonization of wolves into agricultural areas, there is increasing concern of wolf–livestock conflicts. To assess the risk wolves may pose to livestock, we initiated a 3-year study investigating the activity patterns, movements, habitat use, visitation to livestock pastures by wolves, and the occurrence of depredation events in an agricultural–wildland matrix in northwestern Minnesota, USA. From June 1997 to November 1999, we captured 23 wolves, including pups, from 3 packs; we radio-collared 16 of these wolves. …

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Preprojective Representations Of Valued Quivers And Reduced Words In The Weyl Group Of A Kac-Moody Algebra, Mark Kleiner, Allen Pelley Aug 2006

Preprojective Representations Of Valued Quivers And Reduced Words In The Weyl Group Of A Kac-Moody Algebra, Mark Kleiner, Allen Pelley

Mathematics - All Scholarship

This paper studies connections between the preprojective representations of a valued quiver, the (+)-admissible sequences of vertices, and the Weyl group by associating to each preprojective representation a canonical (+)-admissible sequence. A (+)-admissible sequence is the canonical sequence of some preprojective representation if and only if the product of simple reflections associated to the vertices of the sequence is a reduced word in the Weyl group. As a consequence, for any Coxeter element of the Weyl group associated to an indecomposable symmetrizable generalized Cartan matrix, the group is infinite if and only if the powers of the element are reduced …

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A Flexible Statistical Method For Detecting Genomic Copy-Number Changes Using Hidden Markov Models With Reversible Jump Mcmc , Oscar M. Rueda, Ramon Diaz-Uriarte Aug 2006

A Flexible Statistical Method For Detecting Genomic Copy-Number Changes Using Hidden Markov Models With Reversible Jump Mcmc , Oscar M. Rueda, Ramon Diaz-Uriarte

COBRA Preprint Series

We have developed a statistical method for the analysis of array based CGH data to detect genomic DNA copy number changes. Our method allows us to answer the biologically relevant questions (what is the probability that a given gene or region has increased or decreased copy number changes) in a clear and simple way, within a rigorous statistical framework. We use a non-homogeneous Hidden Markov Model that incorporates distance between genes, a crucial requirement to analyze data from platforms where distances between probes is highly variable. As the true number of hidden states (states of copy number changes) is not …

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Proceedings Of 8th Bird Strike Committee Usa/Canada Annual Meeting: 21-24 August 2006 Aug 2006

Proceedings Of 8th Bird Strike Committee Usa/Canada Annual Meeting: 21-24 August 2006

Bird Strike Committee-USA/Canada Joint Annual Meeting: 8th (2006)

Includes abstracts of 26 papers and 12 poster sessions. Complete in one document (39 pages).

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Building Consolidation Project, Robert Fridell Aug 2006

Building Consolidation Project, Robert Fridell

Regis University Student Publications (comprehensive collection)

This project paper proposes a technical solution to the problem of consolidating, a company's two main Datacenters together into one single Datacenter. The project paper specifically addresses issues pertaining to the projects Local Area Networks, Wide Area Networks and Storage Area Networks. The project paper will provide an overview concerning the requirements gathered for the project, a design to meet the requirements, a plan to implement the new designs, and provide information about the plans implementation successes and problems encountered. Though the project lacked a common methodology, project schedule and did not meet certain key goals, the project was successfully …

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Marine Investigations Of Greece's Santorini Volcanic Field, Haraldur Sigurdsson, Steven Carey, Matina Alexandri, Georges Vougioukalakis, Katherine Croff, Chris Roman, Dimitris Sakellariou, Christos Anagnostou, Grigoris Rousakis, Chrysanti Ioakim, Aleka Goguo, Dionysis Ballas, Thanassis Misaridis, Paraskevi Nomikou Aug 2006

Marine Investigations Of Greece's Santorini Volcanic Field, Haraldur Sigurdsson, Steven Carey, Matina Alexandri, Georges Vougioukalakis, Katherine Croff, Chris Roman, Dimitris Sakellariou, Christos Anagnostou, Grigoris Rousakis, Chrysanti Ioakim, Aleka Goguo, Dionysis Ballas, Thanassis Misaridis, Paraskevi Nomikou

Graduate School of Oceanography Faculty Publications

The most recent major explosive eruption of the Santorini volcano in Greece—around 3600 years before present (B.P.), often referred to as the Minoan eruption—is one of the largest volcanic events known in historical time and has been the subject of intense volcanological and archeological studies [Druitt et al., 1999]. The submarine volcano Kolumbo, located seven kilometers northeast of Santorini and associated with Santorini's tectonic system, erupted explosively in 1650 A.D., resulting in fatalities on the island of Thera [Fouqué, 1879]. A large fraction of the erupted products from the Minoan eruption has been deposited in the …

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Novel Method For Structured Light System Calibration, Song Zhang, Peisen S. Huang Aug 2006

Novel Method For Structured Light System Calibration, Song Zhang, Peisen S. Huang

Song Zhang

System calibration, which usually involves complicated and time-consuming procedures, is crucial for any 3-D shape measurement system. In this work, a novel systematic method is proposed for accurate and quick calibration of a 3-D shape measurement system we developed based on a structured light technique. The key concept is to enable the projector to “capture” images like a camera, thus making the calibration of a projector the same as that of a camera. With this new concept, the calibration of structured light systems becomes essentially the same as the calibration of traditional stereovision systems, which is well established. The calibration …

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Simultaneously Optimizing Dose And Schedule Of A New Cytotoxic Agent, Thomas M. Braun, Peter F. Thall, Hoang Nguyen, Marcos De Lima Aug 2006

Simultaneously Optimizing Dose And Schedule Of A New Cytotoxic Agent, Thomas M. Braun, Peter F. Thall, Hoang Nguyen, Marcos De Lima

The University of Michigan Department of Biostatistics Working Paper Series

Traditionally, phase I clinical trial designs determine a maximum tolerated dose of an experimental cytotoxic agent based on a fixed schedule, usually one course consisting of multiple administrations, while varying the dose per administration between patients. However, in actual medical practice patients often receive several courses of treatment, and some patients may receive one or more dose reductions due to low-grade (non-dose limiting) toxicity in previous courses. As a result, the overall risk of toxicity for each patient is a function of both the schedule and the dose used at each adminstration. We propose a new paradigm for Phase I …

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Direct Synthesis Of Single-Walled Carbon Nanotubes Bridging Metal Electrodes By Laser-Assisted Chemical Vapor Deposition, J. Shi, Yongfeng Lu, K.J. Yi, Yushun Lin, Sy_Hwang Liou, J.B. Hou, X.W. Wang Aug 2006

Direct Synthesis Of Single-Walled Carbon Nanotubes Bridging Metal Electrodes By Laser-Assisted Chemical Vapor Deposition, J. Shi, Yongfeng Lu, K.J. Yi, Yushun Lin, Sy_Hwang Liou, J.B. Hou, X.W. Wang

Sy-Hwang Liou Publications

Direct synthesis of single-walled carbon nanotubes (SWNTs) bridging prepatterned Mo electrodes has been achieved using laser-assisted chemical vapor deposition (LCVD). The synthesized SWNTs are found predominantly semiconducting. By controlling the spot size of the focused laser beam, synthesis of SWNTs can be achieved in a localized manner, which is governed by the thermal and optical properties of materials as well as the laser parameters. The synthesis process is fast and can be achieved in both far- and near-infrared laser wavelength regions. LCVD method provides a potential approach to in situ remove SWNTs with specific chiralities during the growth. © 2006 …

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Cryptographic Key Generation From Biometric Data Using Lattice Mapping, Gang Zheng, Wanqing Li, Ce Zhan Aug 2006

Cryptographic Key Generation From Biometric Data Using Lattice Mapping, Gang Zheng, Wanqing Li, Ce Zhan

Faculty of Informatics - Papers (Archive)

Crypto-biometric systems are recently emerging as an effective process of key management to address the security weakness of conventional key release systems using passcodes, tokens or pattern recognition based biometrics. This paper presents a lattice mapping based fuzzy commitment method for cryptographic key generation from biometric data. The proposed method not only outputs high entropy keys, but also conceals the original biometric data such that it is impossible to recover the biometric data even when the stored information in the system is open to an attacker. Simulated results have demonstrated that its authentication accuracy is comparable to the well-known k-nearest …

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A Shunting Inhibitory Convolutional Neural Network For Gender Classification, Fok Hing Chi Tivive, Abdesselam Bouzerdoum Aug 2006

A Shunting Inhibitory Convolutional Neural Network For Gender Classification, Fok Hing Chi Tivive, Abdesselam Bouzerdoum

Faculty of Informatics - Papers (Archive)

Demographic features, such as gender, are very important for human recognition and can be used to enhance social and biometric applications. In this paper, we propose to use a class of convolutional neural networks for gender classification. These networks are built upon the concepts of local receptive field processing and weight sharing, which makes them more tolerant to distortions and variations in two dimensional shapes. Tested on two separate data sets, the proposed networks achieve better classification accuracy than the conventional feedforward multilayer perceptron networks. On the Feret benchmark dataset, the proposed convolutional neural networks achieve a classification rate of …

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Heliospheric Response To Different Possible Interstellar Environments, Hans-Reinhard Muller, Priscilla C. Frisch, Vladimir Florinski, Gary P. Zank Aug 2006

Heliospheric Response To Different Possible Interstellar Environments, Hans-Reinhard Muller, Priscilla C. Frisch, Vladimir Florinski, Gary P. Zank

Dartmouth Scholarship

At present, the heliosphere is embedded in a warm, low-density interstellar cloud that belongs to a cloud system flowing through the local standard of rest with a velocity near ~18 km s-1. The velocity structure of the nearest interstellar material (ISM), combined with theoretical models of the local interstellar cloud (LIC), suggest that the Sun passes through cloudlets on timescales of ≤103-104 yr, so the heliosphere has been, and will be, exposed to different interstellar environments over time. By means of a multifluid model that treats plasma and neutral hydrogen self-consistently, the interaction of the …

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Perchlorate And Nitrate Remediation Efficiency And Microbial Diversity In A Containerized Wetland Bioreactor, Paula Krauter, Bill Daily Jr., Valerie Dibley, Holly Pinkart, Tina Legler Aug 2006

Perchlorate And Nitrate Remediation Efficiency And Microbial Diversity In A Containerized Wetland Bioreactor, Paula Krauter, Bill Daily Jr., Valerie Dibley, Holly Pinkart, Tina Legler

All Faculty Scholarship for the College of the Sciences

We have developed a method to remove perchlorate (14–27 μg/L) and nitrate (48 mg/L) from contaminated groundwater using a wetland bioreactor. The bioreactor has operated continuously in a remote field location for more than 2 yr with a stable ecosystem of indigenous organisms. This study assesses the bioreactor for long-term perchlorate and nitrate remediation by evaluating influent and effluent groundwater for oxidation-reduction conditions and nitrate and perchlorate concentrations. Total community DNA was extracted and purified from 10-g sediment samples retrieved from vertical coring of the bioreactor during winter. Analysis by denaturing gradient gel electrophoresis of short, 16S rDNA, polymerase-chain-reaction products …

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Categorification Of The Colored Jones Polynomial And Rasmussen Invariant Of Links, Anna Beliakova, Stephan Wehrli Aug 2006

Categorification Of The Colored Jones Polynomial And Rasmussen Invariant Of Links, Anna Beliakova, Stephan Wehrli

Mathematics - All Scholarship

We define a family of formal Khovanov brackets of a colored link depending on two parameters. The isomorphism classes of these brackets are invariants of framed colored links. The Bar-Natan functors applied to these brackets produce Khovanov and Lee homology theories categorifying the colored Jones polynomial. Further, we study conditions under which framed colored link cobordisms induce chain transformations between our formal brackets. We conjecture that, for special choice of parameters, Khovanov and Lee homology theories of colored links are functorial (up to sign). Finally, we extend the Rasmussen invariant to links and give examples, where this invariant is a …

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Scaling And The Smoluchowski Equations, Jerry Goodisman, J. Chaiken Aug 2006

Scaling And The Smoluchowski Equations, Jerry Goodisman, J. Chaiken

Chemistry - All Scholarship

The Smoluchowski equations, which describe coalescence growth, take into account combination reactions between a j-mer and a k-mer to form a (j+k)-mer, but not breakup of larger clusters to smaller ones. All combination reactions are assumed to be second order, with rate constants K jk. The K jk are said to scale if K λj,γk =λ μγ μK jk for j ≤ k. It can then be shown that, for large k, the number density or population of k-mers is given by Ak ae -bk, where A is a normalization constant (a function of a, …

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Application Of Scaling And Kinetic Equations To Helium Cluster Size Distributions: Homogeneous Nucleation Of A Nearly Ideal Gas, J. Chaiken, Jerry Goodisman, Oleg Komilov, J. Peter Toennies Aug 2006

Application Of Scaling And Kinetic Equations To Helium Cluster Size Distributions: Homogeneous Nucleation Of A Nearly Ideal Gas, J. Chaiken, Jerry Goodisman, Oleg Komilov, J. Peter Toennies

Chemistry - All Scholarship

A previously published model of homogeneous nucleation [Villarica et al., J. Chem. Phys. 98, 4610 (1993)] based on the Smoluchowski [Phys. Z. 17, 557 (1916)] equations is used to simulate the experimentally measured size distributions of 4He clusters produced in free jet expansions. The model includes only binary collisions and does not consider evaporative effects, so that binary reactive collisions are rate limiting for formation of all cluster sizes despite the need for stabilization of nascent clusters. The model represents these data very well, accounting in some cases for nearly four orders of magnitude in variation in abundance over …

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Multicentered Integrated Qm:Qm Methods For Weakly Bound Clusters: An Efficient And Accurate 2-Body:Many-Body Treatment Of Hydrogen Bonding And Van Der Waals Interactions, Gregory S. Tschumper Aug 2006

Multicentered Integrated Qm:Qm Methods For Weakly Bound Clusters: An Efficient And Accurate 2-Body:Many-Body Treatment Of Hydrogen Bonding And Van Der Waals Interactions, Gregory S. Tschumper

Chemistry Faculty Research & Creative Works

An efficient integrated QM:QM technique for the description of weakly bound clusters is presented. The computational technique described here takes advantage of the recently developed multicentered (MC) integrated QM:QM methods and reliably describes hydrogen bonding and van der Waals interactions by treating all 2-body interactions with a high-level QM method and the many-body interactions with a low-level QM method. Even for small clusters of He, Ne, HF, and water, the MC QM:QM methods are typically 1-3 orders of magnitude faster than the high-level method while introducing an error of less than 1% in the interaction energy. © 2006 Elsevier B.V. …

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Creation Of Pair Test Online Application, Kevin R. Hayes Aug 2006

Creation Of Pair Test Online Application, Kevin R. Hayes

Regis University Student Publications (comprehensive collection)

This project researches, analyzes, designs and implements a software application to provide the ability for the PAIR Test to be automated. Currently, the PAIR Test is only available in an offline/manual format. The offline process is not efficient and the data collected does not get stored into a database. The goal of this project is to enable the PAIR Test to become more efficient and have the ability to store results of the testing process into a database for future data analysis. The system will also remove the manual scoring and relationship profile creation by automating this process, resulting in …

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The Nuclear Central Force In The Chiral Limit, John Donoghue Aug 2006

The Nuclear Central Force In The Chiral Limit, John Donoghue

John Donoghue

Chiral perturbation theory supplemented by the Omnes function is employed to study the strength of the isoscalar central nuclear interaction, G_S, in the chiral limit vs the physical case. A very large modification is seen, i.e. eta_s = G_S ~ chiral /G_S ~ physical = 1.37 +- 0.10 . This large effect is seen to arise dominantly at low energy from the extra contributions made by massless pions at energies near the physical threshold where the physical spectral function must vanish kinematically. The slope away from the chiral limit, d_S, is also calculated and is correspondingly large. I also explain …

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Efficient Large Scale Acquisition Of Building Interiors, Gleb Bahmutov Aug 2006

Efficient Large Scale Acquisition Of Building Interiors, Gleb Bahmutov

Department of Computer Science Technical Reports

No abstract provided.

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