Analisis Pengaruh Viral Marketing Dan Kepercayaan Terhadap Keputusan Pembelian Pelanggan Tas Tiruan Secara Online Melalui Media Sosial Facebook

This study aimed to analyze the effect of viral marketing on customer purchasing decisions knockoff handbags online through social media Facebook and to analyze the effect of confidence in the purchasing decisions of customers knockoff handbags online through social media Facebook. This study used a sample of 100 respondents using purposive sampling with criteria for the sampling of respondents had been put through a mock online purchase bags and a minimum age of 12 years, the WHO criteria divides teens, ranging from 12-21 years. Distribution of early adolescence (12-15 years), middle adolescence (15-18 years) and late adolescence (18-21 years). The procedure is done by filling out the questionnaire: the questionnaire that has been prepared is sent to the inbox of an individual consumer online knockoff handbag ago after being charged by the respondent, the questionnaire tsbt sent back via inbox on Facebook and on the answers of respondents were then processed and uploaded in SPSS. The research results showed that the viral marketing variables (X1) and trust (X2) have an influence on purchasing decisions knockoff handbags online at facebook networking

Data Driven Surrogate Based Optimization in the Problem Solving Environment WBCSim

Large scale, multidisciplinary, engineering designs are always difficult due to the complexity and dimensionality of these problems. Direct coupling between the analysis codes and the optimization routines can be prohibitively time consuming due to the complexity of the underlying simulation codes. One way of tackling this problem is by constructing computationally cheap(er) approximations of the expensive simulations, that mimic the behavior of the simulation model as closely as possible. This paper presents a data driven, surrogate based optimization algorithm that uses a trust region based sequential approximate optimization (SAO) framework and a statistical sampling approach based on design of experiment (DOE) arrays. The algorithm is implemented using techniques from two packages—SURFPACK and SHEPPACK that provide a collection of approximation algorithms to build the surrogates and three different DOE techniques—full factorial (FF), Latin hypercube sampling (LHS), and central composite design (CCD)—are used to train the surrogates. The results are compared with the optimization results obtained by directly coupling an optimizer with the simulation code. The biggest concern in using the SAO framework based on statistical sampling is the generation of the required database. As the number of design variables grows, the computational cost of generating the required database grows rapidly. A data driven approach is proposed to tackle this situation, where the trick is to run the expensive simulation if and only if a nearby data point does not exist in the cumulatively growing database. Over time the database matures and is enriched as more and more optimizations are performed. Results show that the proposed methodology dramatically reduces the total number of calls to the expensive simulation runs during the optimization process

Alignment in Gamma-Hadron Families of Cosmic Rays

Alignment of main fluxes of energy in a target plane is found in families of cosmic ray particles detected in deep lead X-ray chambers. The fraction of events with alignment is unexpectedly large for families with high energy and large number of hadrons. This can be considered as evidence for the existence of coplanar scattering of secondary particles in interaction of particles with superhigh energy, $E_0 > 10^{16}$ eV. Data analysis suggests that production of most aligned groups occurs low above the chamber and is characterized by a coplanar scattering and quasiscaling spectrum of secondaries in the fragmentation region. The most elaborated hypothesis for explanation of alignment is related to the quark-gluon string rupture. However, the problem of theoretical interpretation of our results still remains open.Comment: 15 pages, 2 tables, 6 figures (not included), Stanford University preprint SU-ITP-94-2

SciRecSys: A Recommendation System for Scientific Publication by Discovering Keyword Relationships

In this work, we propose a new approach for discovering various relationships among keywords over the scientific publications based on a Markov Chain model. It is an important problem since keywords are the basic elements for representing abstract objects such as documents, user profiles, topics and many things else. Our model is very effective since it combines four important factors in scientific publications: content, publicity, impact and randomness. Particularly, a recommendation system (called SciRecSys) has been presented to support users to efficiently find out relevant articles

Refinement Step For Parameter Estimation In The Crs Method

The Common Reflection Surface (CRS) method is a powerful extension of the well established Common Midpoint (CMP) method in the sense that it is able to accept at each trace location on the zero-offset (ZO) section to be constructed, reflection data from source and receiver pairs that are arbitrarily located around that point. The CRS method uses the general hyperbolic moveout, that depends, in the 2D situation considered in this work, on three parameters. One of these parameters is the classical NMO velocity. As in the single-parameter CMP method, the CRS parameters or attributes are estimated by a direct application of suitable coherence analysis to the input multicoverage data. The estimation of the three CRS parameters is generally performed in two steps. The first step has a global character and aims in obtaining an initial estimate of the parameters. The second step has a local character, trying to refine the previous initial values to more accurate values. Here we focus on the refinement step assuming that initial estimates have been already provided. We review and compare three of these methods and compare their performances on illustrative synthetic and real data examples. Comparisons with the application of the conventional CMP method are also provided.213275286BIRGIN, E. et al. Restricted optimization as a due to last and accurate implementation of the common reflection surface stack method. Journal of Applied Geophysics, [S.I.], v. 42, p. 143-155, 1999CASTLE, R. J. A theory of normal move out. Geophysics, [S.I.], v. 59, p. 983-999, 1994CHIRA-OLIVA, P. et al. Formula for a 2D curved measurement surface and finite-offset reflections. Journal of Seismic Eylorotion, [S.I.], v. 10, p. 245-262, 2001GARABITO, G., (2001) Empilhamento de superfícies de reflexão comum: Uma nova seqüência de processamento usando otimização global e local. 2001, , Tese (Doutorado)-Universidade Federal do Pará, BelémGILL, P. E.MURRAY, W.WRIGHT, M. H. Pratical optimization. [S.I.]: Academic Press, 1981HUBRAL, P. Computing true amplitude reflections in a laterally inhomogeneous earth. Geophysics, [S.I.], v. 48, p. 1051-1062, 1983MANN, J. Extensions and application of the common reflection surface stack method. 2002. Thesis (PhD)-University of Karlsruhe, [S.I.], 2002MÜLLER, J. The common reflection surface stack method: seismic imaging without explicit knowledge of the velocity model. 1999. Thesis (PhD)-University of Karlsruhe, [S.I.], 1999NEIDEL, N.TANER, M. Semblance and other coherency measures for multichannel data. Geophysics, [S.I.], v. 36, p. 482-497, 197

MR and CT imaging of pulmonary valved conduits in children and adolescents: normal appearance and complications.

BACKGROUND: The Contegra® is a conduit made from the bovine jugular vein and then interposed between the right ventricle and the pulmonary artery. It is used for cardiac malformations in the reconstruction of right ventricular outflow tract. OBJECTIVE: To describe both normal and pathological appearances of the Contegra® in radiological imaging, to describe imaging of complications and to define the role of CT and MRI in postoperative follow-up. MATERIALS AND METHODS: Forty-three examinations of 24 patients (17 boys and 7 girls; mean age: 10.8 years old) with Contegra® conduits were reviewed. Anatomical description and measurements of the conduits were performed. Pathological items examined included stenosis, dilatation, plicature or twist, thrombus or vegetations, calcifications and valvular regurgitation. Findings were correlated to the echographic gradient through the conduit when available. RESULTS: CT and MR work-up showed Contegra® stenosis (n = 12), dilatation (n = 9) and plicature or twist (n = 7). CT displayed thrombus or vegetations in the Contegra® in three clinically infected patients. Calcifications of the conduit were present at CT in 12 patients and valvular regurgitation in three patients. The comparison between CT and/or MR results showed a good correlation between the echographic gradient and the presence of stenosis in the Contegra®. CONCLUSION: CT and MR bring additional information about permeability and postoperative anatomy especially when echocardiography is inconclusive. Both techniques depict the normal appearance of the conduit, and allow comparison and precise evaluation of changes in the postoperative follow-up

ENERGY ACQUISITION AND ALLOCATION IN PLANTS AND INSECTS: A HYPOTHESIS FOR THE POSSIBLE ROLE OF HORMONES IN INSECT FEEDING PATTERNS

A distributed delay age structure model is presented for plants and insects that describes the dynamics of per capita energy (dry matter) acquisition and allocation patterns, and the within-organism subunit (e.g. leaves, fruit, ova) number dynamics that occur during growth, reproduction, and development. Four species of plants (common bean, cassava, cotton, and tomato) and two species of insects (pea aphid and a ladybird beetle) are modeled. A common acquisition (i.e. functional response) submodel is used to estimate the daily photosynthetic rates in plants and consumption rates in pea aphid and the ladybird beetle. The focus of this work is to capture the essence of the common attributes between trophic levels across this wide range of taxa. The models are compared with field or laboratory data. A hypothesis is proposed for the observed patterns of reproduction in pea aphid and in a ladybird beetl