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71.
In an attempt to develop a more conceptually oriented system of psychiatric classification, the statistical relationships occurring among various symptomatic reactions were studied in 604 patients. The deviant reactions were organized into symptom clusters, and a test of their stability was made in another group of Ss. The 3 symptom clusters which emerged were "avoidance of others… self-indulgence and turning against others… [and] self-deprivation and turning against the self." (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
72.
Jaesu Kim Kwang-Jae Lee Cheul-Ro Lee Mun Seok Jeong Hoonsoo Kang Jin Dong Song Jung Il Lee Sam Kyu Noh Jae-Young Leem 《Thin solid films》2010,518(22):6500-6504
We report the influences of growth parameters on the characteristics of GaAs quantum rings (QRs) and quantum dots (QDs) formed on AlGaAs/GaAs by the droplet epitaxy (DE) method. After forming Ga droplets on the AlGaAs/GaAs surface, varying amounts of arsenic (As) flux were introduced to fabricate the GaAs quantum structures. By decreasing the As flux from 8 × 10− 5 to 3 × 10− 5 Torr, the shape of the GaAs quantum structures was changed from QDs to elongated QRs. With further decreasing As flux, the shape of the elongated QRs became symmetric. The formation characteristics of the GaAs QRs from the QDs with the amount of As flux were discussed in terms of migration behaviors of the gallium (Ga) atoms on the GaAs(001)-c(4 × 4) surface. The effects of the amount of Ga supply and the growth temperature for the deposition of Ga droplets on the formation of the GaAs quantum structures were also considered. 相似文献
73.
Nornikman Hassan Zahriladha Zakaria Weng Yik Sam Izyan Nazihan Mohd Hanapiah A. Nasoruddin Mohamad Ameer Farhan Roslan Badrul Hisham Ahmad Mohd Khairy Ismail Mohamad Zoinol Abidin Abd Aziz 《国际射频与微波计算机辅助工程杂志》2019,29(1)
This work focusing on the dual‐band antenna design with rectifying circuit for energy transfer system technology for enhancement gain performance. The air gap technique is applied on this microstrip antenna design work to enhance the antenna gain. The work begins with designing and analyzing the antenna via the CST Microwave Studio software. After validation on acceptable performance in simulation side is obtained, the return loss, S11 of the antenna is measured using vector network analyzer equipment. The rectifier circuit is used to convert the captured signal to DC voltage. This projected dual‐band antenna has successfully accomplished the target on return loss of ?44.707 dB and ?32.163 dB at dual resonant frequencies for 1.8 GHz and 2.4 GHz, respectively. This proposed antenna design benefits in low cost fabrication and has achieved high gain of 6.31 dBi and 7.82 dBi for dual‐band functioning frequencies. 相似文献
74.
Shinji Takasugi Hong‐Jae Shin Min‐Kyu Chang Sam‐Min Ko Hyo‐Jin Park Jeong‐Pyo Lee Han‐Seop Kim Chang‐Ho Oh 《Journal of the Society for Information Display》2016,24(7):410-418
In this paper, we present novel organic light‐emitting diode (OLED) display panel compensation technologies for large‐sized ultra‐high‐definition OLED TVs considering variations of threshold voltage, mobility, channel size, OLED efficiency, and OLED uniformity. Using these technologies, we have successfully launched 55‐, 65‐ and 77‐in. ultra‐high‐definition OLED TVs. 相似文献
75.
Detecting pattern-based outliers 总被引:6,自引:0,他引:6
Outlier detection targets those exceptional data that deviate from the general pattern. Besides high density clustering, there is another pattern called low density regularity. Thus, there are two types of outliers w.r.t. them. We propose two techniques: one to identify the two patterns and the other to detect the corresponding outliers. 相似文献
76.
The authors define ordered subset processing for standard algorithms (such as expectation maximization, EM) for image restoration from projections. Ordered subsets methods group projection data into an ordered sequence of subsets (or blocks). An iteration of ordered subsets EM is defined as a single pass through all the subsets, in each subset using the current estimate to initialize application of EM with that data subset. This approach is similar in concept to block-Kaczmarz methods introduced by Eggermont et al. (1981) for iterative reconstruction. Simultaneous iterative reconstruction (SIRT) and multiplicative algebraic reconstruction (MART) techniques are well known special cases. Ordered subsets EM (OS-EM) provides a restoration imposing a natural positivity condition and with close links to the EM algorithm. OS-EM is applicable in both single photon (SPECT) and positron emission tomography (PET). In simulation studies in SPECT, the OS-EM algorithm provides an order-of-magnitude acceleration over EM, with restoration quality maintained. 相似文献
77.
Tirthankar?GhoshEmail author Niki?Pissinou Kami?Sam?Makki 《Mobile Networks and Applications》2005,10(6):985-995
Designing a trusted and secure routing solution in an untrustworthy scenario is always a challenging problem. Lack of physical
security and low trust levels among nodes in an ad hoc network demands a secure end-to-end route free of any malicious entity.
This is particularly challenging when malicious nodes collude with one another to disrupt the network operation. In this paper
we have designed a secure routing solution to find an end-to-end route free of malicious nodes with collaborative effort from
the neighbors. We have also extended the solution to secure the network against colluding malicious nodes, which, to the best
of our knowledge, is the first such solution proposed. We have also proposed a framework for computing and distributing trusts
that can be used with out trusted routing protocol. Our proposed framework is unique and different from the other schemes
in that it tries to analyze the psychology of the attacker and quantifies the behavior in the computational model. Extensive
simulation has been carried out to evaluate the design of our protocol.
Partially funded by Department of Defense Award No. H98230-04-C-0460, Department of Transportation Project No. FL-26-7102-00
and National Science Foundation Grant Nos. ANI-0123950 and CCR-0196557.
Tirthankar Ghosh is a PhD candidate in the Telecommunications and Information Technology Institute at Florida International University. His
area of research is routing security and trust computation in wireless ad hoc and sensor networks. He received his Bachelor
of Electrical Engineering from Jadavpur University, India and Masters in Computer Engineering from Florida International University.
Dr. Niki Pissinou received her Ph.D. in Computer Science from the University of Southern California, her M.S. in Computer Science from the
University of California at Riverside, and her B.S.I.S.E. in Industrial and Systems Engineering from The Ohio State University.
She is currently a tenured professor and the director of the Telecommunication & Information Technology Institute at FIU.
Previously Dr. Pissinou was a tenured faculty at the Center for Advanced Computer Studies at the University of Louisiana at
Lafayette where she was also the director of the Telecommunication & Information & Technology Laboratory partially funded
by NASA, and the co-director of the NOMAD: A Wireless and Nomadic Laboratory partially funded by NSF, and the Advanced Network
Laboratory. Dr. Pissinou is active in the fields computer networks, information technology and distributed systems.
Dr. Kami (Sam) Makki has earned his Ph.D. in Computer Science from the University of Queensland in Brisbane Australia, his Masters degree in Computer
Science and Engineering from the University of New South Wales in Sydney Australia, and his Bachelor and Masters Degrees in
Civil Engineering from the University of Tehran Iran. Before joining the department of Electrical Engineering and Computer
Science at the University of Toledo he has held a number of academic positions and research appointments at the Queensland
University of Technology in Brisbane, Royal Melbourne Institution of Technology in Melbourne and at The University of Queensland
in Brisbane Australia. He is an active researcher in the fields of distributed systems, databases, mobile and wireless communications,
and has more than 30 publications in peerreviewed journals and international proceedings. He has served as a chair and technical
program committee member and reviewer for a number of IEEE and ACM sponsored technical conferences and has received a number
of achievement awards. 相似文献
78.
NUMERICAL MODELING OF SUSPENDED SEDIMENT TRANSPORT IN CHANNEL BENDS 总被引:18,自引:11,他引:7
1. INTRODUCTION Due to the fact that three-dimensional (3D) numerical models are quite expensive to simulate flow and sediment transport processes, vertically-integrated two-dimensional (2D) models are extensively applied at present, even to the predictio… 相似文献
79.
J. López-Vidrier S. Hernández J. Samà M. Canino M. Allegrezza M. Bellettato R. Shukla M. Schnabel P. Löper L. López-Conesa S. Estradé F. Peiró S. Janz B. Garrido 《Materials Science and Engineering: B》2013,178(9):639-644
In this work we present a structural, optical and electrical characterization of SixC1?x/SiC multilayer systems with different silicon content. After the deposition process, an annealing treatment was carried out in order to induce the silicon nanocrystals formation. By means of energy-filtered transmission electron microscopy (EFTEM) we observed the structural morphology of the multilayers and the presence of crystallized silicon nanoprecipitates for samples annealed up to 1100 °C. We discuss the suitability of optical techniques such as Raman scattering and reflectance and transmittance (R&T) for the evaluation of the crystalline fraction of our samples at different silicon excess ranges. In addition, the combination of R&T measurements with simulation has proved to be a useful instrument to confirm the structural properties observed by EFTEM. Finally, we explore the origin of the extremely high current density revealed by electrical measurements, probably due to the presence of an undesired defective SiCyOz ternary compound layer, already supported by the structural and optical results. Nevertheless, the variation of the electrical measurements with the silicon amount indicates a small but significant contribution from the multilayers. 相似文献
80.
Hemant J. Desai Daniel O. Acheampong Robert Hudson Richard Lacey Claire Stanley Helen Turner 《Journal of Energetic Materials》2017,35(1):109-124
The synthesis of a novel heterocyclic–telechelic polymer, α,ω-oxetanyl-telechelic poly(3-nitratomethyl-3-methyl oxetane), is described. Infrared spectroscopy (IR), gel permeation chromatography (GPC), and nuclear magnetic resonance (NMR) spectroscopy have been used to confirm the successful synthesis, demonstrating the presence of the telechelic-oxetanyl moieties. Synthesis of the terminal functionalities has been achieved via displacement of nitrato groups, in a manner similar to that employed with other leaving groups such as azido, bromo, and nitro, initiated by nucleophiles. In the present case, displacement occurs on the ends of a nitrato-functionalized polymer driven by the formation of sodium nitrate, which is supported by the polar aprotic solvent N,N-dimethyl formamide. The formation of an alkoxide at the polymer chain ends is favored and allows internal back-biting to the nearest carbon bearing the nitrato group, intrinsically in an SN2(i) reaction, leading to α,ω-oxetanyl functionalization. The telechelic-oxetanyl moieties have the potential to be cross-linked by chemical (e.g., acidic) or radiative (e.g., ultraviolet) curing methods without the use of high temperatures, usually below 100°C. This type of material was designed for future use as a contraband simulant, whereby it would form the predominant constituent of elastomeric composites comprising rubbery polymer with small quantities of solids, typically crystals of contraband substances, such as explosives or narcotics. This method also provides an alternative approach to ring closure and synthesis of heterocycles. 相似文献