Construction Of Large-scale Research Articles

A Theoretical Basis for the Application of Neuromorphic Concepts to Polychronous Wavefront Computation

Polychronous Wavefront Computation (PWC) defines a simple model of spiking neural networks based on spatially positioned transponders stimulated by signal wavefronts. The simplicity of the concept and elimination of explicit connections between transponders can potentially provide a practical basis for construction of large scale, complex pattern recognition systems. Previous work has shown how PWC transponders can be used to perform basic computations and be organized into simple pattern recognition configurations but the creation of complex pattern recognition behavior remains a difficult problem. The purpose of this work is to identify the key characteristics of complex biological and artificial neural networks and explore the application of those characteristics to the PWC model. The analysis includes a review of neuromorphic processes such as spike-timing-dependent plasticity, synaptic fatigue and potentiation decay as well as biologically inspired artificial neural network structures such as multi-layer perceptrons and convolutional neural networks. Recognition of stimulus sources and use of inhibitive stimulus are identified as key characteristics not addressed by PWC. Approaches to incorporate these key characteristics into the PWC model are discussed with the objective of creating transponder configurations that use unsupervised learning to perform complex pattern recognition.

Writing the Genome: Are We Ready?

Since the completion of the Human Genome Project (HGP-read), improvements of sequencing technology, dramatic reductions in sequencing cost, and importantly, progress in understanding of the function of the human genome have been continual. Recent advances in sequencing-based technologies and DNA-editing methods [e.g., CRISPR (clustered regularly interspaced short palindromic repeat)] present the possibility of synthesizing and editing DNA on a large scale. With these possibilities, a question is raised: would construction of large scale (0.1–1 billion bp) genomes lead to further understanding and applications of genomic information? A collaborative group called the Center of Excellence for Engineering Biology, led by New York University synthetic biologist Dr. Jef D. Boeke, formally announced the Human Genome Project-Write (HGP-write) in the …

DNA origami platform development for the detection of metals in water.

Many people are becoming increasingly interested in learning the composition of their drinking water. However, for a variety of reasons, only very limited information is available to the public and even to the suppliers of drinking water. Clearly, ubiquitous water testing would be ideal, and this challenge provides motivation for the analytical chemistry community to develop new approaches to quantitation. This project seeks to address this information gap through the development of thin organic arrays, composed of DNA, which are functionalized with molecular species which can selectively bind metals of interest and enable optical detection and characterization of these reversible binding events. Progress in two areas, DNA platform development and ligand design will be presented.Tiles constructed from DNA have been generated which can present a variety of molecular species with a local periodicity of ~100 nm. Modulation of the strength and directionality of interaction of these tiles has been shown to lead to partial or local ordering of these tiles, an important step toward the construction of large scale arrays.Organic ligand systems for two metals of interest, Al and U, have been designed. These ligand designs include two modules, one module enabling covalent attachment to the DNA based platforms through a DNA linker sequence, while the other module supports a binding and reporting function. The synthesis of these ligand systems is currently in progress.Funding for this project was provided by the NASA West Virginia Space Grant Consortium and NSF Cooperative Agreement No. OIA-1458952.

Practice Research on Wet-Collapsible Loess Foundation Treatment by High Energy Dynamic Compaction

A systematic and comprehensive study on the design, construction and testing of large scale of Ⅲ～Ⅳ grade wet-collapsible loess foundation treatment by 8000 kN•m high energy dynamic compaction is done in this paper. Effect on the treatment for collapsible loess foundation by dynamic compaction is analyzed through Rayleigh wave velocity test, standard penetration test, lab soil test and static cone penetration test. By comparison with physical and mechanical properties index of the foundation soil without dynamic compaction treatment, the effective reinforcement depth, the elimination of collapsibility and the bearing capacity of foundation are found to meet the design requirements. The results of this paper could supply some reference for the design, construction and testing of other collapsible loess foundations by dynamic compaction treatment.

Mid-water rope nursery—Testing design and performance of a novel reef restoration instrument

Fast degradation of coral reefs worldwide has promoted the exploitation of active restoration instruments, one of which is the ‘gardening concept’. This concept comprises two phases: (1) establishing in situ coral nurseries for rearing large numbers of coral fragments; (2) their transplantation onto denuded reefs. This study tested the design and performance of a novel mid-water floating nursery instrument, a ‘rope nursery’. This nursery accommodated small coral fragments attached to a rope, creating an easily constructed nursery bed that is rapid and inexpensive. Two sets of experiments were conducted: the first tested two mid-water rope nursery prototypes in small-scale trials that tested depth, coral genotypes and construction stability, whereas the second set incorporated lessons learned from the first set, and was designed to carry larger numbers of colonies. These highly economical nurseries (US$ 0.11/fragment) revealed high survivorship low detachment and fast growth rates compared to previous coral-nursery types. Moreover, the coiling force of the ropes adequately held fragments without adhesives, and the minimal surface area of rope nursery beds provided not only improved water flux around farmed corals, but also reduced proliferation of fouling organisms. The rope nursery prototypes studied here attest to the diversity of their potential uses under various conditions and demands, making the construction of large scale nurseries a very feasible target. This restoration instrument was proven to be an effective coral reef rehabilitation tool.

NOISE REDUCTION EFFECT AND RESISTANCE TO AGGREGATE SCATTERING OF RUBBER ELASTIC PAVEMENTS FOR PARKINGS

In the case of construction of large scale shopping malls and extension of those business hours, consideration on the ambient environment, such as noise issue, is essential. To investigate application of the rubber elastic pay ements, which are expected high noise reduction effect, for the parking of large shopping mall, the measurements both of road vehicle noise and shopping cart noise at low speed were carried out. As a result, it becomes clear that the rubber elastic pavements show high noise reduction of road vehicle noise at low speed and the noise from shop ping carts can also be reduced.

Effects of Protective Capping on Ultra-Thin SIMOX Structures

Abstract Devices for character recognition as well as cellular phones require computational elements that work at higher speeds with lower current requirements. Separation by IMplanted Oxygen (SIMOX) is one type of Silicon On Insulator (SOI) technology that shows great promise in meeting the future demands for faster and more efficient applications. The ultra-thin SIMOX substrates produced by low energy/low dose implant methods make possible the construction of large scale integrated circuits with fully depleted CMOS devices. One of the great challenges in the production of SIMOX technology is achieving high quality Si and Si02 layers. High energy implantation of 0+ ions causes damage to the Si crystal and therefore requires a high temperature annealing step to repair it. Annealing of SIMOX takes place in a mixed atmosphere of argon and oxygen. Having oxygen in the ambient creates a superficial Si02 layer. This reduces the thickness of the SOI layer but also protects the surface from pitting.

大型浮体モデル上でのRTK-GPS計測

We tried to evaluate the adaptability of RTK-GPS to future construction of an ultra large scale floating steel structure, named 'Mega-Float', by the analysis of the acquired data on a very-large-scale model. The standard deviation of short term variation in each direction is less than 1cm. It is smaller than the nominal accuracy of the receiver and seems to be a measure of the amplitude of the oscillation. The deviation in vertical direction increases with the increase of significant wave height. Those in the other directions also reflect wave height variation. Noise level inferred from many patterns of temporal variation of the calculated positions is less than 1 or 2mm. Although when determining the absolute position, the noise level may reach the order of the nominal value mentioned above, due to drift and jump of the calculated positions, it is ensured that only RTK-GPS has an enough accuracy for the offshore construction of such a huge floating structure.

特集 低温貯槽の大型化と溶接技術の動向 ＬＮＧ地上式貯槽の現状と大容量化

特集 低温貯槽の大型化と溶接技術の動向 ＬＮＧ地上式貯槽の現状と大容量化

特集 低温貯槽の大型化と溶接技術の動向 ＬＮＧ地下式貯槽の現状と大容量化

特集 低温貯槽の大型化と溶接技術の動向 ＬＮＧ地下式貯槽の現状と大容量化

特集 低温貯槽の大型化と溶接技術の動向 地上式低温貯槽と溶接技術 現状と今後の動向

特集 低温貯槽の大型化と溶接技術の動向 地上式低温貯槽と溶接技術 現状と今後の動向

特集 低温貯槽の大型化と溶接技術の動向 地上式低温貯槽と溶接技術 現状と今後の展開

特集 低温貯槽の大型化と溶接技術の動向 地上式低温貯槽と溶接技術 現状と今後の展開

Superconducting niobium cavities of improved thermal conductivity

The construction of large scale superconducting accelerators asks for reliable and economical manufacturing procedures for the superconducting cavities. The improvement of thermal conductivity of the niobium used can be of great benefit in that respect. We have built and tested single cell cavities at 500 MHz and 3 GHz from a newly available niobium sheet material of improved thermal conductivity. At 500 MHz a maximum accelerating field of 13.0 MV/m at 4.2 K was achieved. At 3 GHz and 1.5 K as a best result 18.7 MV/m were obtained. A total of 15 cavity tests were carried out and the results clearly exceed field values obtained so far with standard reactor grade niobium at CERN and Wuppertal. Measurements of the thermal conductivity of niobium at helium temperatures are discussed, the temperature dependence of the surface resistance of high purity niobium is given, the observed field and Q limitations and electron loading phenomena are outlined.