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A cognitive model＇s view of animal cognition

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Current Zoology 2011年第4期57卷 499-513页

作者： Sidney d'MELLO Stan FRANKLIN department of Psychology University of Memphis Memphis TN 38152 USA Institute of Intelligent Systems University of Memphis Memphis TN 38152 USA

Although it is a relatively new field of study, the animal cognition literature is quite extensive and difficult to synthesize. This paper explores the contributions a comprehensive, computational, cognitive model can make toward organizing and assimilating this literature, as well as toward identifying important concepts and their interrelations. Using the LIdA model as an example, a framework is described within which to integrate the diverse research in animal cognition. Such a framework can provide both an ontology of concepts and their relations, and a working model of an animal＇s cognitive processes that can compliment active empirical research. In addition to helping to account for a broad range of cognitive processes, such a model can help to comparatively assess the cognitive capabilities of different animal species. After deriving an ontology for animal cognition from the LIdA model, we apply it to develop the beginnings of a database that maps the cognitive facilities of a variety of animal species. We conclude by discussing future avenues of research, particularly the use of computational models of animal cognition as valuable tools for hypotheses generation and testing [Current Zoology 57 （4）： 499-513, 2011].

关键词： Cognitive models Computational models LIdA Ontology Taxonomy

SEMI-QUANTITATIVE CHARACTERIZATION OF SEGMENT dISTRIBUTION IN LLdPE BASEd ON THERMAL SEGREGATION

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Chinese Journal of Polymer Science 2002年第4期20卷 347-352页

作者： Stephen Z.d.Cheng Maurice Morton Institute and department of Polymer Science University of Akron Akron Lhio 44325-3909 USA

Based on successive multiple-step isothermal crystallization and self-nucleation annealing methods, a novel semi-quantitative method for the characterization of segment distribution in linear low density polyethylene (LLdPE) was established by treating the thermal analysis data using the Gibbs-Thomson equation. The method was used to describe the segment distribution of Ziegler-Natta catalyzed LLdPE (Z-N LLdPE), metallocene catalyzed LLdPE (m-LLdPE) and two commercial LLdPEs with wide molecular weight distribution. The differences of the results obtained from the two thermally treated samples were compared. The results of segment distribution of the polymers were discussed according to their microstructure data and were compared with their characteristics. It can be deduced from the results that this characterization method is effective to characterize the sequence structure of the branched ethylene copolymers.

关键词： characterization segment distribution linear low density polyethylene thermal segregation

HALOMETHYLATION OF POLYSTYRENE ANd SUBSEQUENT PYRIdINATION VIA A HOMOLYTIC PATHWAY

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Chinese Journal of Polymer Science 2006年第6期24卷 627-635页

作者： Sad Moulay Nadia Mehdi Laboratoire de Chimie-Physique Moléculaire et Macromoléculaire Faculté des Sciences de l'Ingénieur Departement de Chimie IndustrielleUniversité de BlidaRoute de SoumaB. P. 270Blida 09000Algeria

Chloromethylation of polystyrene （PS） with two different chloromethylating systems methylal/thionyl chloride and paraformaldehyde/trimethylchlorosilane was studied. Soluble chloromethylated polystyrene with a degree of substitution of 89% was obtained. The Conant-Finkelstein reaction on the chloromethylated PS afforded soluble iodomethylated polystyrene with a degree of substitution as high as 96%. The reaction conditions of Minisci were employed to radically pyridinate PS via its iodomethylated derivative. Polyelectrolytes were formed which could be converted to normal polymers by treatment with a 20% aqueous solution of NaOH.

关键词： Chloromethylated polystyrene Conditions of Minisci Iodomethylated polystyrene Pyridinated polystyrene.

JUMPING INSTABILITIES IN THE POST-BUCKLING OF A BEAM ON A PARTIAL NONLINEAR FOUNdATION

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Acta Mechanica Solida Sinica 2013年第5期26卷 500-513页

作者： Yin Zhang Kevin d Murphy State Key Laboratory of Nonlinear Mechanics (LNM) Institute of Mechanics Chinese Academy of Sciences department of Mechanical Engineering University of Connecticut

Mode jumping is an instability phenomenon in the post-buckling region, which causes a sudden change in the equilibrium configuration and is thus harmful to structure. The con- figuration of a partial elastic foundation can directly induce mode coupling from the buckling stage and through the whole post-buckling region. The mode coupling effect due to the configuration of partial foundation on mode jumping is investigated and demonstrated to be an important factor of determining mode jumping. By properly choosing the partial elastic foundation configuration, mode jumping can be avoided.

关键词： instability mode jumping tertiary jumping buckling beam elastic foundation

PYRIdINATION OF POLY(VINYL CHLORIdE) via A HOMOLYTIC PATHWAY

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Chinese Journal of Polymer Science 2007年第3期25卷 297-302页

作者： Sad Moulay Zakia Zeffouni Laboratoire de Chimie-Physique Moléculaire et Macromoléculaire Faculté des Sciences de l'Ingénieur Département de Chimie IndustrielleUniversité Sad Dahlab de BlidaRoute de SoumaB. P. 270Blida 09000Algeria

PVC was subjected to a chemical modification aiming at replacing the chlorine atoms by pyridine groups via a homolytic route. Pyridine groups were peculiarly affixed to the PVC matrix via a carbon-carbon bond rather than a carbonnitrogen one. PVC was first iodinated using the Conant-Finkelstein reaction, followed by the application of the homolytic conditions of Minisci to generate pyridinated PVC with a varying degree of substitution. The extent of substitution was not high; the reaction on 30% iodinated PVC afforded a degree of modification no greater than 3%.

关键词： Conditions of Minisci Iodinated PVC Pyridinated PVC

disappearance of the dirac cone in silicene due to the presence of an electric field

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Chinese Physics B 2014年第3期23卷 63-70页

作者： d.A.Rowlands 张宇钟 Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology School of Physics Science and EngineeringTongji University

Using the two-dimensional ionic Hubbard model as a simple basis for describing the electronic structure of silicene in the presence of an electric field induced by the substrate, we use the coherent-potential approximation to calculate tbe zero-temperature phase diagram and the associated spectral function at half filling. We find that any degree of symmetry- breaking induced by the electric field causes the silicene structure to lose its dirac fermion characteristics, thus providing a simple mechanism for the disappearance of the dirac cone.

关键词： silicene dirac cone ionic Hubbard model coherent-potential approximation

Micro-computed tomography utility for estimation of intraparenchymal spinal cord cystic lesions in small animals

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Neural Regeneration Research 2021年第11期16卷 2293-2298页

作者： Mahmoud Farrag dipak d.Pukale Nic d.Leipzig Integrated Bioscience Program The University of AkronAkronOHUSA department of Chemical Biomolecularand Corrosion EngineeringThe University of AkronAkronOHUSA department of Chemical Biomolecularand Corrosion EngineeringIntegrated Bioscience ProgramThe University of AkronAkronOHUSA

Precise assessment of spinal cord cystic lesions is crucial to formulate effective therapeutic strategies,yet histological assessment of the lesion remains the primary method despite numerous studies showing inconsistent results regarding estimation of lesion size via *** the other hand,despite numerous advances in micro-computed tomography(micro-CT)imaging and analysis that have allowed precise measurements of lesion size,there is not enough published data on its application to estimate intraspinal lesion size in laboratory animal *** work attempts to show that micro-CT can be valuable for spinal cord injury research by demonstrating accurate estimation of syrinx size and compares between micro-CT and traditional histological *** used a post-traumatic syringomyelia rat model to compare micro-CT analysis to conventional histological *** study showed that micro-CT can detect lesions within the spinal cord very similar to ***,micro-CT appears to provide more accurate estimates of the lesions with more measures(e.g.,surface area),can detect compounds within the cord,and can be done with the tissue of interest(spinal cord)*** summary,the experimental work presented here provides one of the first investigations of the use of micro-CT for estimating the size of intraparenchymal cysts and detecting materials within the spinal *** animal procedures were approved by the University of Akron Institutional Animal Care and Use Committee(IACUC)(protocol#LRE 16-05-09 approved on May 14,2016).

关键词： cyst size histology intraparenchymal cysts lesion size estimate micro-CT post-traumatic syringomyelia spinal cord imaging spinal cord injury spinal cystic lesion syrinx

Fabrication of 3d-printed molds for polydimethylsiloxane-based microfluidic devices using a liquid crystal display-based vat photopolymerization process:printing quality,drug response and 3d invasion cell culture assays

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Microsystems & Nanoengineering 2023年第6期9卷 205-219页

作者： Matthew d.Poskus Tuo Wang Yuxuan deng Sydney Borcherding Jake Atkinson Ioannis K.Zervantonakis department of Bioengineering UPMC Hillman Cancer CenterUniversity of PittsburghPittsburghPAUSA McGowan Institute of Regenerative Medicine PittsburghPAUSA

Microfluidic platforms enable more precise control of biological stimuli and environment dimensionality than conventional macroscale cell-based assays;however,long fabrication times and high-cost specialized equipment limit the widespread adoption of microfluidic *** improvements in vat photopolymerization three-dimensional(3d)printing technologies such as liquid crystal display(LCd)printing offer rapid prototyping and a cost-effective solution to microfluidic *** information is available about how 3d printing parameters and resin cytocompatibility impact the performance of 3d-printed molds for the fabrication of polydimethylsiloxane(PdMS)-based microfluidic platforms for cellular *** a low-cost,commercially available LCd-based 3d printer,we assessed the cytocompatibility of several resins,optimized fabrication parameters,and characterized the minimum feature *** evaluated the response to both cytotoxic chemotherapy and targeted kinase therapies in microfluidic devices fabricated using our 3d-printed molds and demonstrated the establishment of flow-based concentration ***,we monitored real-time cancer cell and fibroblast migration in a 3d matrix environment that was dependent on environmental *** results demonstrate how vat photopolymerization LCd-based fabrication can accelerate the prototyping of microfluidic platforms with increased accessibility and resolution for PdMS-based cell culture assays.

关键词： invasion printing culture

Couple stress nanofluid flow through a bifurcated artery—Application of catheterization process

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Applied Mathematics(A Journal of Chinese Universities) 2021年第4期36卷 492-511页

作者： KM Surabhi Arpitha Ravikanti d.Srikanth d.Srinivasacharya department of Applied Mathematics Defence Institute of Advanced Technology(Deemed University)Girinagar Pune 411025India department of Mathematics National Institute of TechnologyWarangal 506004India

In this article,we are exploring the hemodynamics of nanofluid,flowing through a bifurcated artery with atherosclerosis in the presence of a *** treating obstruction in the artery,one can use the catheter whose outer surface is carrying the drug coated with *** resultant solvent is considered as blood *** being a complex fluid,is modeled by couple stress *** the presence of nano-particles,the temperature and the concentration distribution are understood in a bifurcated stenotic *** concluded mathematical model is governed by coupled non-linear equations,and are solved by using the homotopy perturbation ***,we have explored is the effects of fluid and the embedded geometric parameters on the hemodynamics *** is also realized that high wall shear stress exists for couple stress nano-fluid when compared to Newtonian *** is computed at a location corresponding to maximum constriction(z=12.5)of the artery.

关键词： couple stress uid bifurcated stenotic artery homotopy perturbation method wall shear stress