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Collaborative multi-user Augmented Reality (AR) applications pose serious challenges to the underlying network infrastructure due to their all-to-all communication pattern. The Named Data Networking (NDN) paradigm can be a crucial enabler of these applications operated in extremely large scale in terms of users, amount of content, and network size. The inherent multicast support together with a carefully designed naming scheme can provide the efficient network operation, while the inflated Forwarding Information Base (FIB) tables of typical NDN routers can be compressed by powerful algorithms to make the concept feasible. In this demonstration, we showcase an AR application supporting remote collaboration for a large number of users. The software stack of our proof-of-concept prototype leverages open source tools, such as ChronoSync, NDN Forwarding Daemon (NFD), Named Data Link State Routing Protocol (NLSR), and in order to validate the feasibility of the concept, we established a flexible NDN test environment based on Docker containers, real Android clients and emulated users. The framework enables starting arbitrary NDN topologies with predefined FIB contents and to emulate thousands of users. During the live demo, we can show the current network status and relevant performance metrics, such as end-to-end application latency, crucial for AR applications.

The revised U.S. Nuclear Regulatory Commission(NRC), Regulatory Guide(RG) 1.20, rev.3 requires the evaluation of the potential adverse effects from pressure fluctuations and vibrations on piping and components for the reactor coolant, steam, feedwater, and condensate systems. Detailed vibration analyses for the systems attached to the steam generator are very difficult, because these piping systems are very complicated. This paper suggests a screening method for the flow-induced vibration of acoustic resonances and pump-induced vibration of the piping systems attached to the steam generator in order to conduct the APR1400 comprehensive vibration assessment program. This paper seeks to address the areas such as potential vibration sources, and methods to prevent the occurrence of acoustic resonances and pump-induced vibration of piping systems attached to the steam generator, for conducting the APR1400 comprehensive vibration assessment program. The screening method in this paper will be used to estimate the flow-induced vibration of the piping systems attached to the steam generator for the APR1400.

We show that optical second-harmonic generation (SHG) from few-layer MoSe2 can sensitively probe external symmetry perturbations such as chemical doping. The SHGs from few-layer MoSe2 are enhanced after AuCl3 chemical doping, especially more so for the thicker MoSe2 samples. This enhancement is due to an electric-field-induced SHG contribution originating from the charge transfer between the adsorbed chemical dopants and the MoSe2. By using this sensitivity, we demonstrate an in-situ monitoring of the thermal desorption of adsorbed chemical dopants. Moreover, we find that the SHG generated from monolayer MoSe2 is counter-circularly polarized for a circularlypolarized fundamental beam due to the three-fold rotational symmetry of MoSe2. Our work shows that SHG can probe not only the symmetry properties of atomically-thin 2D semiconductors, but also the external symmetry perturbations on them.

Named data networking (NDN) is a novel communication paradigm that employs names rather than references to the location of the content. It exploits in-network caching among different nodes in a network to provide the fast delivery of content. Thus, it reduces the backhaul traffic on the original producer and also eliminates the need for a stable connection between the source (consumer) and destination (producer). However, a bottleneck or congestion may still occur in very crowded areas, such as shopping malls, concerts, or stadiums, where thousands of users are requesting information from a device that resides at the edge of the network. This paper provides an analysis of content delivery in terms of the interest satisfaction rate (ISR) in ultra-dense network traffic situations and presents a final and an adequate statistical model based on multiple linear regression (MLR) to enhance ISR. A four-way factorial design was used to generate the dataset by performing simulations in ndnSIM. The results show that there is no significant interaction between four predictors: number of nodes (NN), number of interests (NI) per second, router bandwidth (RB), and router delay (RD). Moreover, the NI has a negative effect, and log(RB) has a positive effect on the ISR. The NN less than 10 has a significantly higher effect on the ISR compared with other nodes&rsquo, densities.

Highly-strained BiFeO3 (BFO) thin films have been found to exhibit a ‘tetragonal-like monoclinic’ crystal structure different from the bulk rhombohedral structure. Here, we report our second harmonic generation (SHG) study of epitaxially-strained tetragonal-like (T-like) BiFeO3 films as a function of temperature and film thickness. We observed a strong SHG peak at ∼370 K, corresponding to a structural phase transition between two T-like BFO phases. Our SHG symmetry analysis revealed that a non-tetragonal intermediate phase that appeared at the structural transition was responsible for the enhanced SHG. We also observed a noticeable enhancement and symmetry change of SHG at the G-type-to-C-type anti-ferromagnetic transition, suggesting the possibility of a structural change coupled to the magnetic transition.

We studied the e ect of laser spike annealing (LSA) on the defects of hafniumoxide (HfO2) high-k dielectric stacks. We found that positive charge generation, extracted from C-V measurements was suppressed for laserspikeannealed HfO2 gate stacks compared with conventional rapidthermallyannealed (RTA) gate stacks. It seems that LSA suppresses the growth of under-oxidized interfacial oxide layer by minimizing oxygen di usion, resulting in less positive charge generation. C-V hysteresis and defect photoluminescence, however, showed enhanced charge trapping and increased oxide defect density for the laser spike annealed HfO2 gate stacks. High-density non-equilibrium chargetrapping defects seem to be created in the HfO2 layer during the rapid cooling process of LSA. We performed post-LSA, lowthermalbudget annealings in various ambient gases to quench or passivate chargetrapping defects, but they didn't seem to e ectively deactivate the LSAcreated oxide defects.

In this paper, we adopted E-MOLD patent technology in order to fabricate Prismless LGP(Light Guide Panel) fur cellular phone and estimate the transcription of injection-molded parts. Then, we manufactured the Ni stamper fur Prismless LGP using MEMS process. And the stamper was installed in the movable heated core which is the key part of a patented mold. Using this mold, we manufactured injection-molded plastic LGP parts with different mold temperatures so that we investigate effect of the temperature on the transcription of the parts. The CAE analysis was also conducted in order to compare with the experimental results. The transcription of LGP parts with various mold temperature displayed (25.0nm), (48.4nm), (52.1nm) and when compared with stamper(521Inm), transcription was superior at . According to the CAE results, moldability was improved as mold temperature () increased, but when filling time() increases, it decreased at . And transcription and moldability were improved markedly at glass transition temperature().

We conducted and verified the structural safety analyses for a type B transport package for a radioactive waste drum. The type B package is used to transport one high-level radioactive waste drum from a waste facility to a temporary site in a nuclear power plant. It is important that the structural integrity of a type B transport package should be maintained under normal transport conditions such as the free drop test, the stacking test and the penetration test, and accident conditions of transport such as the 9 m height free drop test and the puncture test. Based on the ASME Boiler and Pressure Vessel Code, Section III, Division 3 we evaluated the structural safety integrity of the type B package for a radioactive waste drum using finite element analysis. For the stacking test condition the maximum stress is a very low value when compared with the stress limits. The impact of the penetration bar on the overpack does not affect the containment part. For the free drop test condition and the puncture test condition the local stresses appear at the impact part and the containment part connected with the inner structure. The maximum stresses for all of the conditions are lower than the stress limits, so the structural integrity of the type B package for a radioactive waste drum was maintained. Also, the structural safety analyses were verified by using the data acquired from the 9 m drop and the puncture tests of the real model. The analytic accelerations of the 9 m drop test are similar to the test results. For the puncture test condition the analytic result is conservative when compared to the test. The analysis for the structural safety of the type B package reveals conservative results and it is proved that its structural integrity is maintained under normal and accident conditions of transport.

A spent fuel storage cask is required to prove the safety of its canister under a hypothetical accidental drop condition which means that the canister is assumed to be free dropped on to a pad of the storage cask during the loading of the canister into a storage cask. In this paper, finite element analyses and verifying tests for a shock-absorbing effect of a pad in a spent fuel dry storage cask were carried out to improve the structural integrity of the canister under a hypothetical accidental drop condition. The pad of the storage cask was originally designed as cylindrical steel structure filled with concrete. The pad was modified by using the structure composed of steel and polyurethane-foam instead of the quarter of the upper concrete as an impact limiter. The effects of the shape and the thickness of the steel structure and the density of the polyurethane-foam which was used in between steel structures were studied. As the optimized pad of a spent fuel dry storage cask, the quarter of the upper concrete was replaced with 12 mm thick circular steel structure and polyurethane-foam whose density was 85 kg/m 3 . The drop tests of a 1/3 scale model for the canister on to the original pad and the optimized pad were conducted. The effect of the pad structure was evaluated from the drop tests. The optimized pad has a greater shock-absorbing effect than the original pad. In order to verify the analysis results, strains and accelerations in the time domain by the analytical methods were compared with those by a test. The numerical method of simulating the free drop test for a dry storage cask was verified and the numerical results were found to be reliable.

In this study the effect of a free drop impact on the bolted joint of the transport package of radioactive material was studied under various directions. A drop test of a type A or a type IP transport package of radioactive material should be conducted under normal transport conditions. After a drop test the radioactive content of the transport package should not be loss or dispersal. A bolt tension during a drop impact under various directions was measured using a force sensor. And the torque to loosen a bolt was measured after the tests. A bolt tension measured by the tests was compared with the result of a finite element analysis. The effect of the drop direction was examined. The vertical drop directions shows larger bolt tension than horizontal drop. For the torque to loosen a bolt, a horizontal drop condition shows larger value than a vertical drop direction.

A numerical study was conducted to evaluate some creep deformation parameter forms. These forms, which have been developed in Part 1, include both the C∗ parameter and ETM δ5 based parameter. They use a separated format that is being verified both experimentally and numerically. The experimental part of the study, Part 2, was conducted with a Mg alloy, AZ31, using notched fracture mechanics specimens. The same material and geometry is being used for this numerical study. The numerical results show that the separated form of the equation appears to be validated. The results were further used to look at the relationships between the various creep deformation parameters. These results show that the C∗ parameter and δ5 rate are related in ways that make it easy to evaluate one from the other.

Kim et al. suggested an experimental method to determine the Q parameter in situ from the out-of-plane displacement and the in-plane strains on the surface of side necking near the crack tip. In this paper, the procedure to evaluate the stress triaxiality near a crack tip such as the Q parameter is to be polished in the details for simplicity and accuracy. That is, Q and hydrostatic stress are determined only from the out-of-plane displacement, but not using in-plane strain, which is hard to measure. And also, the plastic modulus is determined by an alternative way. Through three-dimensional finite element analyses for a standard CT specimen with 20% side-grooves, the validities of the new procedures are examined in comparison to the old ones. The effect of location where the displacements are measured to determine the stress triaxiality is explored.

A way to measure the second parameter of CT specimens is described. The displacement which is measured continuously from visual images of the lateral surface during crack growth is used to calculate the A, as a function of crack growth. The crack length is measured by DCPD(Direct Current Potential Drop) method and the J-resistance curve is determined according to ASTM standard E1737-96. To prove the validity of this method, three dimensional finite element analyses were performed, and variations of the displacements and along the thickness were explored. As the result, it has been shown that the measured from the visual images of the lateral surface and the corresponding can be regarded as the average through the thickness for 1T and 1/2T specimens of SA106Gr.C steel.steel.

Results of fracture experiments of brass/solder/brass sandwich CTS (Compact Tension-Shear) specimens are presented together with observations of the crack propagation behavior and the fractographs. The fracture behaviors of the interface crack are analyzed by the finite element method with a modified boundary layer formulation. Several fracture mechanisms and the corresponding criteria are examined. And the crack growth behavior and fracture toughness are predicted. As the results various crack growth procedures such as the crack jump to another interface on the opposite side, the nucleation of a new crack far from the initial crack front, and the asymmetric relation of fracture toughness versus mode mix J∞c−φ can be successfully explained. The fractographs, the crack growth behaviors, and stress-strain distribution along the interface are inter-related.

Cisplatin is a member of platinum-containing anti-cancer drugs that causes cross-linking of DNA and ultimately cancer cell apoptosis. The therapeutic function of cisplatin on various types of cancers has been widely reported but the side effects have been discovered together and nephrotoxicity has been regarded as major side effect of cisplatin. To select candidates for new sensitive nephrotoxicity biomarker, we performed proteomic analysis using 2-DE/MALDI-TOF-MS followed by cisplatin treatment in human kidney cell line, HK-2 cells, and compared the results to the gene profi le from microarray composed of genes changed in expression by cisplatin from formerly reported article. Annexin A5 has been selected to be the most potential candidate and it has been identifi ed using Western blot, RT-PCR and cell viability assay whether annexin A5 is available to be a sensitive nephrotoxic biomarker. Treatment with cisplatin on HK-2 cells caused the increase of annexin A5 expression in protein and mRNA levels. Overexpression of annexin A5 blocked HK-2 cell proliferation, indicating correlation between annexin A5 and renal cell toxicity. Taken together, these results suggest the possibility of annexin A5 as a new biomarker for cisplatin-mediated nephrotoxicity.

In the two parameter approaches, one of the second parameters, T-stress, Q and A2 is used together with J-integral to describe the constraint loss near the crack tip under large scale yielding states. Among the second parameters, Q seems to be most promising from a practical point of view because it applies for three-dimensional geometries. In order to determine the Q for a given geometry and load, however, three-dimensional elastic-plastic finite element analysis, which is time consuming and costly, has had to be performed so far. In this work an experimental method to measure Q-parameter insitu is described. The basic idea comes from the fact that side necking near a crack tip indicates the loss of stress triaxiality, which can be scaled by Q. From the out-of-plane displacement and the in-plane strain measured on the surface of side necking near the crack tip, stress field averaged through thickness is calculated and then Q is determined from the difference between the stress filed and the HRR field corresponding to the identical J-integral. To prove the validity, three-dimensional finite element simulation has been performed for a CT configuration with side-grooves. Q-value which was calculated directly from the near-tip stress field is compared with that determined by simulating the experimental procedure according to the proposed method, that is, the Q-value determined from the lateral displacement and the in-plane strain. Also, the effect of location where the displacement and strain are measured is explored. Moreover, an easy way for measuring the displacement and strain simultaneously is described. That is based on Stereoscopic Digital Photography and high resolution Digital Image Correlation (DIC) software, and can be performed along with conventional fracture tests. A case study for a CT specimen of ferritic steel is presented.Copyright © 2003 by ASME

The task of reaching with a hand toward a target given in space is generally described as an ill-posed problem. It is often assumed that some kind of internal body model is required to solve this problem. This article provides information concerning the nature of this representation. Experiments were carried out in which blindfolded subjects were stimulated mechanically at one of eight possible stimulation sites on the legs and then asked to move one hand as quickly as possible to the stimulated site. In nine different postures of legs and hands, the frequency was recorded of the use of either hand. In addition, reaction times (RT) were measured and in two choice reaction tasks RTs were measured for different conditions (morphologically compatible vs morphologically incompatible, hands parallel vs hands crossed): The results support the hypothesis that the representation of the body is based on at least two systems, one which provides spatial information concerning the body position and a second one which is based on a morphological representation. According to this hypothesis, our results could be described by the following schema. Following the application of the stimulus, two processes were started in parallel. One concerned the activation of the spatial representation of body position, including the position of stimulus site and the possible response sites. This was more difficult, i.e., took more time, when the hands were crossed. Within this spatial representation, the distances between stimulus site and response sites were determined, and it was found that the smaller the distance, the more strongly the hands were activated. Simultaneously, in a second process the response site which was morphologically ipsilateral to the stimulus was excited. This schema could explain our results: In the behavioral experiments that hand which was most strongly excited, and which therefore exceeded a threshold sooner, won the decision and showed smaller RT values. In the choice reaction experiments, the winning hand was compared with the externally given task. The more strongly, according to the given task, the wrong hand was excited, the longer was the RT of the response.