Digital Commons Network^™

Dynamic Behavior Of Cellular Architectures And The Role Of Topology, Vincent Brick

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

This work investigates the dependence of strength and energy absorbance characteristics of cellular solids on inner topological features under high-strain-rate normal and mixed mode loading conditions. Topological features investigated in this work include cellular geometry, connectivity, in-plane and out-of-plane cellular aspect ratios. Varying the cellular geometry and connectivity is achieved by investigating cellular specimens with hexagonal, triangular, and square core cell geometries. This work utilizes explicit dynamic finite element simulations to examine the relationships among strength, energy absorbance, cellular geometry, and the underlying deformation mechanisms. Results over the length scales examined strongly indicate that hexagonal geometry has higher specific and …

Computer Aided Design Of Planar Four-Bar Linkages On Ios Using A Novel Svd Algorithm, Xin Ge

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Motion synthesis has been a practical topic existing for a long time. Various methods have been tried and put into practice. It is well done by the scientists and engineers to solve large equations of matrix. Although it can be done and get the good result, the efficiency is low and labor is very much consuming. Comparatively, our methods are much more easier and efficient, it is more suitable for the software to realize the calculation by itself. It is mature in PCs to have a motion synthesis software, but since the mobile system is going into everyday life and …

Lack Of Csk-Mediated Negative Regulation In A Unicellular Src Kinase, Kira Schultheiss

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Tyrosine kinases play important roles in cellular communication in animals. c-Src is a nonreceptor tyrosine kinase that is involved in survival, angiogenesis, proliferation, and invasion pathways. There are 9 Src family kinases, and they have a conserved domain arrangement (SH3-SH2-kinase) that is necessary for regulation. The basal activity of c-Src is normally kept low due to phosphorylation by C-terminal Src kinase (Csk). This regulatory relationship has been conserved throughout the evolution of animals. Until recently, it was thought that complex signaling molecules, such as the tyrosine kinases, did not exist outside of multicellular animals. Newly discovered unicellular precursors to mammalian …

A Distributed Mac Protocol For Efficient Channelization In Wireless Networks, Seyed Kaveh Fayazbakhsh

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

There is a significant interest in designing new wireless multiple access protocols that split a wide frequency channel into multiple sub-channels and assign these sub-channels to competing transmissions. Doing this adaptively depending on the number of competing transmissions has a tremendous potential both in high-speed and white-space networks. While such protocols have been developed, they suffer from limitations such as considerable protocol overheads, dependence on a centralized controller, and assumptions about the network being static, etc. In this work, we develop a new multiple access protocol, Ez-Channel, that adaptively and efficiently channelizes the spectrum for improving throughput, without encountering the …

(I) Synthesis And Application Of Chiral Biphenol-Based Phosphorus Ligands To Catalytic Asymmetric Synthesis; (Ii) Rhodium-Catalyzed Cycloaddition Reactions For Rapid Construction Of Polycyclic Skeletons Of Biological Interest, Chih-Wei Chien

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Chiral ligand design is crucial for the asymmetric transformations. In our laboratory, libraries of fine-tunable phosphorus ligands based on axially chiral biphenol have been well developed. These ligands exhibit excellent enantioselectivity in various transition-metal catalyzed asymmetric reactions. We present here the application of the monodentate phosphoramidite (MPN) ligand library to the Pd-catalyzed intramolecular asymmetric allylic amination (AAA) for the formation of chiral 1-vinyltetrahydroiso-quinoline skeleton, a versatile key intermediate in the synthesis of natural products such as isopyruthaline and (− )-O-methylthaicanine. We also studied the Pd-catalyzed inter-molecular AAA reaction using our bidentate diphosphonite (BOP) ligands. The BOP ligands exhibit excellent efficacy …

Analysis Of Zip1 And Sgs1 Protein Interaction In Budding Yeast, Sana F. Hussain

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Meiotic crossovers (COs) are essential for proper chromosomal separation. Interhomologue recombination is promoted by the synaptonemal complex (SC), which connects paired homologous chromosomes together. Zip1, an integral component of the SC, antagonizes Sgs1 helicase function during meiotic recombination to promote COs. Specifically, Zip1 and other ZMM proteins shield strand invasion intermediates from Sgs1 activity, thus preventing Sgs1 from disassembling them. It has been previously discovered that Zip1 interacts with Sgs1 in two-hybrid experiments, and that full length Zip1 binds to Sgs1 in vitro. These interactions suggest that the antagonism may be due to direct interactions between Sgs1 and Zip1. This …

Stimulated Raman Adiabatic Passage Between Metastable And Rydberg States Of Helium, Yuan Sun

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

We investigate the coherent population transfer and associated effects for a three level atomic system, with the third level being a Rydberg state. The scheme adopted here is the stimulated Raman adiabatic passage (STIRAP). An atomic beam of metastable helium is orthogonally crossing two laser beams in a tunable dc electric field. The ir laser of 790 - 830 nm connects the triplet 3P state to the Rydberg states (n = 12 - 50) and the uv laser of 389 nm connects the metastable triplet 2S state to the triplet 3P state. A third laser of 1083 nm driving 2S-2P …

System Evaluation And Design Of Delay-Sensitive Wireless Networks, Xi Deng

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Wireless networks have now been widely used and enjoyed in many aspects of human life and the society. Delay-sensitive wireless network, in a strict sense, is not a particular type of wireless networks. It represents a large number of wireless networks whose performance is greatly affected by the packet end-to-end delay, defined as the duration between a packet's generation at the source node and its delivery to the destination. Such network has been growing rapidly in recently years due to the tremendous demands from network applications. Emerging multimedia applications including Video-on-demand (VOD) and Voice-over-IP (VoIP) have become one of the …

An Automated, Track-Based Climatology Of Rossby Wave Packets, Matthew Souders

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

This research produces an objective, track-based climatology of Rossby wave packets (RWPs) and tests the sensitivity of the results to changes in the methods used in filtering the raw data and in tracking. NCEP/NCAR Reanalysis wind and geopotential height data at 300 hPa every 6 hours were spectrally filtered using a Hilbert transform technique under the assumption that RWPs propagate along a waveguide defined by the 14-day running average of the 300 hPa wind. After some spatial smoothing, the local maxima in RWP envelope amplitude (WPA) were tracked using two objective techniques: a point-based cost optimization routine and a hybrid …

Comparisons Of Intermediate Oxidation State Sulfur Compounds In The Episodically, Lan Thi Tong

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

The anoxic Cariaco Basin located on the Venezuela continental shelf and the seasonally anoxic Forge River located on the south shore of Long Island are two quite different aquatic systems. However, they are both characterized by the pulsed intrusion of oxygen into sulfidic waters, where sulfur intermediates including sulfite (SO32-), thiosulfate (S2O32-), and zero-valent sulfur (So) are usually found. In this study, I investigated the distribution of sulfur intermediates and the relative importance of chemical and biological hydrogen sulfide oxidation to the sulfur intermediates distribution in these two systems. The sulfide oxidation rate, determined using Forge River water with an …

The Genetic Diversity Of Endangered Fishes In The Northwest Atlantic, Shannon Joy O'Leary

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Genetic diversity is the fundamental building block of biodiversity, harboring the adaptive potential of populations. The magnitude of the two main factors eroding genetic diversity, inbreeding and genetic drift, increases as the effective population size (Ne) decreases. Ne describes the number of reproductively mature adults effectively contributing to the next generation. In populations with overlapping generations, the effective number of breeders (Nb). Loss of genetic diversity has long been a concern for terrestrial and freshwater organisms, but traditionally less so for fisheries management due to the paradigm that marine fish populations are large, panmictic and thus resistant to the erosion …

Simulation Of Electron Beam Dyanmics In The 22 Mev Accelerator For A Coherent Electron Cooling Proof Of Principle Experiment, Justin Owen

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Coherent electron cooling (CeC) offers a potential new method of cooling hadron beams in colliders such as the Relativistic Heavy Ion Collider (RHIC) or the future electron ion collider eRHIC. A 22 MeV linear accelerator is currently being built as part of a proof of principle experiment for CeC at Brookhaven National Laboratory (BNL). In this thesis we present a simulation of electron beam dynamics including space charge in the 22 MeV CeC proof of principle experiment using the program ASTRA (A Space charge TRacking Algorithm). | 48 pages

Measurements Of The W Boson Mass With The D0 Detector, Rafael Coelho Lopes De Sa

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Thesis est omnis divisa in partes tres. In the first part, we describe what is the W boson mass in the context of the Standard Model. We discuss the prominent role this physical observable plays in the determination of the internal self consistency of the Electroweak Sector. We review measurements and calculation of the W boson mass done in past and argue about the importance and feasibility of improving the experimental determination. We give a description of the Fermilab Tevatron Collider and the D0 detector, highlighting the relevant parts for the measurement described in this Dissertation. In the second part, …

Comparisons Of Intermediate Oxidation State Sulfur Compounds In The Episodically, Lan Thi Tong

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

The anoxic Cariaco Basin located on the Venezuela continental shelf and the seasonally anoxic Forge River located on the south shore of Long Island are two quite different aquatic systems. However, they are both characterized by the pulsed intrusion of oxygen into sulfidic waters, where sulfur intermediates including sulfite (SO32-), thiosulfate (S2O32-), and zero-valent sulfur (So) are usually found. In this study, I investigated the distribution of sulfur intermediates and the relative importance of chemical and biological hydrogen sulfide oxidation to the sulfur intermediates distribution in these two systems. The sulfide oxidation rate, determined using Forge River water with an …

The Dynamical Basis Of The Decanalization Of Gene Expression In Kr Uppel Mutant Embryos, Lena Panok

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Canalization is the ability of an organism's phenotype to remain stable under a perturbation in their genotype or the environment. It has been noted that there is no canalization or canalization is to a much smaller degree in mutants than in wild type. Waddington's idea was to understand canalization through studying gene interactions. We investigate the mechanisms of canalization of gap gene patterns in D.melanogaster through dynamical analysis of the gene circuit. To carry out this investigation we construct a dynamical model of the evolution of the concentration of protein products of the gap genes in time. Our model, which …

Scalable Particle And Mesh Algorithms For Elliptic Components Of Multiphase Problems, Tongfei Guo

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

New mesh and meshless algorithms for elliptic boundary and elliptic interface problems have been developed. By utilizing the embedded boundary method, a mesh based algorithm to solve elliptic interface problem is implemented as an extension of hybrid Eulerian-Lagrangian hydrodynamic library FronTier which employs the method of front tracking for interface propagation and this implementation is parallelized for distributed memory clusters. The use of embedded boundary method supports arbitrary discontinuities of density and other physics properties across the interfaces and significantly improves methods that smear interface discontinuities across several grid cells. This code has been applied to process simulation for heat …

Crystallization And Structure Relationship Of Polyolefin-Based Polymers Under Static And Flow Conditions, Xiaowei Li

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Polyolefins have played an important role in human society, partially due to wide applications, such as their extensive use in packaging films, cables, wires, bags, containers, and appliances. Therefore, it becomes a worthwhile undertaking to investigate and to improve their properties, which can reduce cost and decrease pollution to the environment. Polyethylene (PE) and Polypropylene (PP) take a large role in polyolefin products. They occupy more than half of the thermoplastic market. They are semi-crystalline polymers with a relatively high degree of crystallinity. The crystal structure is an important factor that should be considered as they are closely related to …

The Design, Synthesis And Biological Evaluation Of Novel Taxoid Anticancer Agents And Their Tumor-Targeted Drug Conjugates, Joshua Seitz

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Cancer is the second leading cause of death in the United States and is responsible for one in eight deaths worldwide. Traditional chemotherapeutics target the processes involved in cell division and consequently produce dangerous and dose-limiting side effects. In an effort to identify the therapeutic windown of these drugs, tumor targeted drug conjugates (TTDCs) are currently under development. The Ojima lab has developed and extensive panel of next-generation taxoids that possess the requisite sub-nanomolar potency for incorporation into effective conjugates. A small library of 17 taxoids was synthesized and their cytotoxicity investigated. Selected taxoids were synthesized on the half-gram to …

Anger And Memory: Misleading People Is Easy When They Are Mad, Michael J. Greenstein

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Previous work has shown that different discrete emotional states (e.g. anger) affect cognitive processing differently. Anger has been associated with simplifying cognition to promote rapid action-related processes. For example, anger promotes an increased tendency to rely on preexisting cognitive biases. Such a processing style may have been advantageous in evolutionary history, but it can also lead to increased memory errors. The present study examined the simplifying effects of anger on memorial processing, using three different misinformation paradigms. The first experiment, using a classic three-phase misinformation paradigm, showed that anger directly affects memory performance and that anger increases acceptance of misinformation …

On The Optimization Of Grid Systems, Kai Wang

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Grid systems are widely used to transfer power and information in various forms in many engineering and scientific areas such as grid computing systems, electrical grids, control grid and etc. A good handling of task partition, task allocation and load balancing can significantly increase a grid systems' efficiency. In this dissertation, balancing the loads in electrical grid systems and optimizing grid computing systems are analyzed. Unbalanced loads on feeders increase power system investment and operating costs. Three-phase lateral loads phase swapping is one of the popular methods to balance such systems. We employed a dynamic programming algorithm that makes optimal …

Characteristics Of Aerosolized Ice Forming Marine Biogenic Particles, Peter Aaron Alpert

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Ice particles are ubiquitous in the atmosphere existing as the sole constituents of glaciated cirrus clouds or coexisting with supercooled liquid droplets in mixed-phase clouds. Aerosol particles serving as heterogeneous ice nuclei for ice crystal formation impact the global radiative balance by modification of cloud radiative properties, and thus climate. Atmospheric ice formation is not a well understood process and represents great uncertainty for climate prediction. The oceans which cover the majority of the earth's surface host nearly half the total global primary productivity and contribute to the greatest aerosol production by mass. However, the effect of biological activity on …

Synthesis And Structures Of New Three-Dimensional Copper Metal-Organic Frameworks, Nitin Kumar Pally

Masters Theses & Specialist Projects

Metal-organic frameworks (MOFs) are crystalline materials with metal ions covalently bonded to organic ligands. The ligands act as spacers often creating a porous structure with very high pore volume and surface area. MOFs are known for their robust structures, high porosity, and different chemical functionalities and are considered for applications in adsorptions, separations, catalysis and gas storage. This work focuses on the synthesis of new MOFs using copper compounds. Different types of carboxylate ligands were used for the synthesis. Two new copper-organic frameworks, [Cu₃(pyz)(btc)] (1), and [(Cu₃(btc))•xH₂O] (2) (btc= benzene-1,3,5-tricarboxylate, pyz= pyrazine) have been …

Full Issue 16(4)

Journal of Public Transportation

No abstract provided.

Tiers 2 & 3 Intervention: Behavior Contracting, Jenna Strahun, Ann O'Connor, Reece L. Peterson

Department of Special Education and Communication Disorders: Faculty Publications

Conclusion

The research on behavior contracts suggests that the procedure is a positively oriented intervention for students with problematic and disruptive behaviors. Behavior contracts are also a tool in which students can generate input in deciding their own goals and rewards for academic and behavioral performance. In addition, behavior contracts are often a smaller element of a larger intervention package that is used to gain compliance and reward the student for adhering to and participating in the intervention. Although much of the research on behavior contracts is outdated and uses small participant sample sizes, behavior contracts may serve to increase …

The Seat-Belt Defense In Georgia, Jacob E. Daly

Mercer Law Review

For a doctrine of common-law origin, the seat-belt defense is a relatively youthful fifty years old. Credit for the first use of this defense has been attributed to the defendant in Stockinger v. Dunisch, a 1964 case in Sheboygan County, Wisconsin, in which the plaintiff's damages were reduced by 10% based on the jury's finding that she was negligent for failing to use a seat belt. Despite this initial success, most states have rejected the defense, some legislatively and others judicially, and therefore exclude evidence of a plaintiffs failure to use an available seat belt. The Georgia Court of …

Administrative Law, Martin M. Wilson, Jennifer A. Blackburn, Courtney E. Ferrell

Mercer Law Review

No abstract provided.

Domestic Relations, Barry B. Mcgough, Elinor H. Hitt

Mercer Law Review

This Article addresses significant case law that arose during the survey period. There were no statutory changes specific to domestic relations during this period, though substantial changes were made to the evidence code.

Insurance, Dean A. Calloway

Mercer Law Review

This survey period, from June 1, 2012 through May 31, 2013, proved eventful. Over the past year, state and federal courts in Georgia had occasion to interpret key provisions of Georgia's Insurance Code, address novel issues of first impression, and resolve disputes with significant policy implications for Georgia's insurance industry.

The following are among the more notable developments: (1) the Georgia Supreme Court formally extended application of the rule in State Farm Mutual Automobile Insurance Co. v. Mabry (the Mabry rule), which is the requirement that an insurer compensate an insured for his vehicle's diminished value resulting from an automobile …

Cite It Right: Critical Assessment Of Open Source Web-Based Citation Generators, Hui-Fen Chang

LOEX Conference Proceedings 2011

Writing proper citations is a critically important part of the research process. Instructing students how to cite is a key component of information literacy initiatives for academic and research libraries. To further support students, many libraries have purchased the licenses to bibliographic management software packages such as RefWorks and EndNote to help create and manage citations. Recently, a number of free or inexpensive Web-based citation generators such as EasyBib, NoodleBib, BibMe, KnightCite, Citation Machine, NCS Citation Builder, SourceAid have emerged and gained the attention of students as well as teaching librarians. While most of these tools are designed to emphasize …

Move Aside Scotty, Jing Is The Thing: Individualized Student-Created Tutorial Collections, Performance Assessment, And Easy Instructor Feedback, Stephanie Wiegand

LOEX Conference Proceedings 2011

If only Scotty could beam us around the world, to wherever and whenever students need our help… But, wait, there's Jing freeware! Engage students in video creation for performance assessment as they build personalized libraries of research tutorials. But, wait, there's more! Address and correct errors in class assignments in seconds. But, wait, there's more! Create individualized instruction for students not enrolled in information literacy courses and videos as follow-ups to one-shot sessions. Attend this session and discover a new frontier of easy and efficient online video utilization for instruction.