scholarly journals Inverse-Scaled Lanczos Filtering for Image Sharpening

2020 ◽  
Vol 2020 (28) ◽  
pp. 215-220
Author(s):  
Hiroaki Kotera
Keyword(s):  
Human Vision ◽  
Sinc Function ◽  
Image Sharpening ◽  
Response Models ◽  
Gaussian Derivative ◽  
Image Scaling ◽  
Smoothing Filter ◽  
Proposed Model ◽  
Edge Response

The edge response in retinal image is the first step for human vision recognizing the outside world. A variety of receptive field models for describing the impulse response have been proposed. Which satisfies the uncertain principle? occupied the interest from a point of minimizing the product (Δx)(Δ w) both in spatial and spectral. Among the typical edge response models, finally Gabor function and 2nd. Gaussian Derivative GD2 remained as strong candidates. While famous D. Marr and R. Young support GD2, many vision researchers prefer Gabor. The retinal edge response model is used for image sharpening.<br/> Different from the conventional image sharpening filters, this paper proposes a novel image sharpening filter by modifying the Lanczos resampling filter. The Lanczos filter is used for image scaling to resize digital images. Usually it works to interpolate the discrete sampled points like as a kind of smoothing filter not as sharpening. The Lanczos kernel is given by the product of sampling Sinc function and the scaled Sinc function. The scaled Sinc function expanded by the scale "s" plays a role of window function. The author noticed that the inverse scaling of Lanczos window can be used not for smoothing but for sharpening filter.<br/> This paper demonstrates how the proposed model works effectively in comparison with Gabor and GD2.

Social Networking Sites Continuance: An Application of Extended Theory of Planned Behaviour

2015 ◽  
Vol 8 (1) ◽  
Author(s):  
Himanshu Rajput
Keyword(s):  
Social Networking ◽  
Social Networking Sites ◽  
Theory Of Planned Behaviour ◽  
Standard Theory ◽  
Planned Behaviour ◽  
Privacy Concerns ◽  
Proposed Model ◽  
Continued Use ◽  
Moderating Role

Social networking sites (SNSs) have become popular in India with the proliferation of Internet. SNSs have gained the interests of academicians and researchers. The current study is an endeavor to understand the continuance of social networking sites in India. The study applies an extended version of theory of planned behavior. Additional factors privacy concerns and habits were incorporated into the standard theory of planned behaviour. A survey was conducted in a Central University in India. Overall, data was collected from 150 respondents. PLS-SEM was used to test the proposed model. All the hypotheses except the moderating role of habits between intentions and continued use of social networking sites, were supported by the results. Habits were found to affect continued use of social networking sites indirectly through continued intentions.

Modeling of unforced demand response programs

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Hassan Jalili ◽  
Pierluigi Siano
Keyword(s):  
Demand Response ◽  
Load Shifting ◽  
Response Models ◽  
Temperature Changes ◽  
Proposed Model ◽  
Equipment Failures ◽  
Demand Response Programs ◽  
Simultaneous Implementation ◽  
Long Term Studies

Abstract Demand response programs are useful options in reducing electricity price, congestion relief, load shifting, peak clipping, valley filling and resource adequacy from the system operator’s viewpoint. For this purpose, many models of these programs have been developed. However, the availability of these resources has not been properly modeled in demand response models making them not practical for long-term studies such as in the resource adequacy problem where considering the providers’ responding uncertainties is necessary for long-term studies. In this paper, a model considering providers’ unavailability for unforced demand response programs has been developed. Temperature changes, equipment failures, simultaneous implementation of demand side management resources, popular TV programs and family visits are the main reasons that may affect the availability of the demand response providers to fulfill their commitments. The effectiveness of the proposed model has been demonstrated by numerical simulation.

Light-Induced Metastable Defects in a-Si:H: Towards an Understanding

1985 ◽  
Vol 49 ◽  
Author(s):  
Martin Stutzmann ◽  
Warren B. Jackson ◽  
Chuang Chuang Tsai
Keyword(s):  
Amorphous Silicon ◽  
Mechanical Stress ◽  
Hydrogenated Amorphous Silicon ◽  
Material Parameters ◽  
Kinetic Behaviour ◽  
Proposed Model ◽  
Special Cases ◽  
The Stability ◽  
Hydrogenated Amorphous

AbstractThe dependence of the creation and the annealing of metastable dangling bonds in hydrogenated amorphous silicon on various material parameters will be discussed in the context of a recently proposed model. After a brief review of the kinetic behaviour governing defect creation and annealing in undoped a- Si:H, a number of special cases will be analyzed: the influence of alloying with O, N, C, and Ge, changes introduced by doping and compensation, and the role of mechanical stress. Finally, possibilities to increase the stability of a-Si:H based devices will be examined.

On the role of the anthropocentric factor in the realization of the derivational potential of names of ungulates as motivating lexical units

2021 ◽  
pp. 191-210
Author(s):  
Nikolay D. Golev ◽  
◽  
Irina P. Falomkina ◽  
Keyword(s):  
Native Speakers ◽  
Russian Language ◽  
Search System ◽  
Proposed Model ◽  
Data Capturing ◽  
Building Behavior ◽  
Building System ◽  
Google Search ◽  
The Russian Language

The paper is dedicated to describing the word-building system of the Russian language in terms of its vocabulary. Lexical factors are discussed influencing the formation of lexical units’ potential as motivating units of word-building processes and relations and the realization of this potential in language activities. Of most interest for the authors are anthropocentric determinants, most of which are coordinating the lexical system and, through its mediation, the word-building system with the worldview of native speakers of the Russian language. The proposed model of derivational development of vocabulary provides such coordination through studying the deep-seated process of conceptualization of the words that are the potential motivators of neologisms. This study identifies the word frequency as an external manifestation of conceptualization. The frequency data were obtained from Google search system statistical data. Capturing not only usual but also occasional and potential words, this source is an effective tool for studying word-building processes and their results. This study has unveiled the interrelation between the language worldview of native speakers of Russian and their “word-building behavior” in language activities. The worldview has been found, first of all, to be determined by the pragmatic factor, which primarily influences the usage of a word in the speech reflected by its frequency. The frequency ranks lexical units due to their derivational potential and thereby provides a researcher with a reliable instrument for its study.

The coupling of single-photon exciton–biexciton quantum dot and cavity

2017 ◽  
Vol 26 (03) ◽  
pp. 1750029 ◽  
Author(s):  
Lina Jaya Diguna ◽  
Yudi Darma ◽  
Muhammad Danang Birowosuto
Keyword(s):  
Correlation Function ◽  
Quantum Dot ◽  
Density Matrix ◽  
High Probability ◽  
Single Photon ◽  
Photon Emission ◽  
Emission Properties ◽  
Proposed Model ◽  
Cavity System

We investigate the influence of multiple excitons on the photon emission properties of a quantum dot (QD)-cavity system via the master equation for the density matrix. We show that in the intermediate to strong coupling regimes, the multiple excitons lead to the suppressed QD emissions as well as the absence of anti-crossing near zero detuning, arising from the interaction between the multiple excitons and cavity. Furthermore, we analyze the role of the cavity-biexciton detuning in the photon emission properties of cavity and exciton through the second-order correlation function. The small cavity-biexciton detuning yields the significant Purcell effect and the high probability of single photon emissions. The proposed model offers the fundamental approach in developing efficient single-photon emitting devices.

scholarly journals Sustainability and Business Outcomes in the Context of SMEs: Comparing Family Firms vs. Non-Family Firms

2018 ◽  
Vol 10 (11) ◽  
pp. 4080 ◽  
Author(s):  
María López-Pérez ◽  
Iguácel Melero-Polo ◽  
Rosario Vázquez-Carrasco ◽  
Jesús Cambra-Fierro
Keyword(s):  
Business Models ◽  
Family Firms ◽  
Medium Size ◽  
Stewardship Theory ◽  
Business Practices ◽  
Socially Responsible ◽  
Business Outcomes ◽  
Proposed Model ◽  
Moderator Role

Society is demanding more sustainable and socially responsible business models. Therefore, the concept of sustainability has become a cornerstone to help understand the success of many firms in the current competitive context. However, the context of SMEs has received little attention thus far. In order to solve this gap this article analyses the links between sustainability practices and business outcomes—both financial and non-financial (i.e., image and reputation)—for small and medium-size enterprises (SMEs). In addition, the study strives to analyze the potential differences between family firms and non-family firms. To this end, a quantitative study is carried out using PLS techniques to analyze a sample of SME owners and managers with a view to testing the proposed model based on the Stewardship Theory and Socioemotional Wealth Theory. In this sense, our study is pioneering in that it aims to assess—from a quantitative viewpoint—the moderator role of family firms on a series of relevant sustainability-driven outcomes. The data suggest that, in SME contexts, sustainability influences the corporate reputation, brand image, and financial value of the company. Importantly, we find that the profile (family vs. non-family) of the firm moderates the links between sustainability and business outcomes. Hence, our findings have important implications for sustainability implementation in SME contexts. Finally, we provide a series of guidelines aimed at maximizing the effectiveness of sustainability-based business practices.

scholarly journals Towards an Ontology of Representation

2021 ◽  
Author(s):  
Riichiro Mizoguchi ◽  
Stefano Borgo
Keyword(s):  
Natural Language ◽  
Proposed Model ◽  
Ontological Analysis ◽  
Ontological Model

In philosophy information is mainly discussed along with the notion of aboutness. In more practical communities, information is mainly addressed together with notions like data and knowledge. This paper proposes a different approach. We look at information (and related concepts) as roles played by representations. This view implies that the notion of representation is central for any ontological analysis of information and related concepts. The paper provides arguments for this new stand and discusses an ontological model of representation based on the systematic distinction between form and content. The broadness and flexibility of the proposed model is shown by discussing a list of variegated representation entities from music to procedure, from novel to painting. The paper also investigates the role of letters (characters) in natural language expressions, which turns out to be quite complex.

scholarly journals Assessment of the impact of the COVID-19 pandemic on the poverty of households

2021 ◽  
Vol 11/1 (-) ◽  
pp. 37-39
Author(s):  
Olena POSHYVALOVA
Keyword(s):  
Economic Impact ◽  
Social Protection ◽  
Economic Implications ◽  
Exogenous Shocks ◽  
Proposed Model ◽  
The Social ◽  
National Economies ◽  
The Impact ◽  
Information Basis

Introduction. The COVID-19 pandemic has caused grave and severe losses in many of the economies across the globe. The impact and the duration of the economic crisis occurring due to the pandemic among certain households is difficult to anticipate since the indeterminacy is being defined through the duration of the crisis and costs for the recovery of the economy. The purpose of the paper is to study theoretical aspects related to the assessment of the impact of the COVID-19 pandemic on the poverty of households. Methods. The theoretical and methodological basis of the study are modern theories, concepts, hypotheses. Comparative analysis is used. The methodological and information basis of the work are scientific works, materials of periodicals, information resources. Results. The paper incorporates a content analysis of studies focusing on the economic impact of the COVID-19 on the development of national economies. The majority of studies assess economic implications of the COVID-19 however they are concentrated on the macroeconomic and financial impact of the Corona Crisis. The impact on national economies is subsequently reduced to the microlevel, specifically the social and economic impact on individuals. Nonetheless, there is a need for a microanalysis which may better describe the interrelation between sectors and countries (the effect of macroeconomic aggregate indicators) and supplement the macroanalysis, providing more relevant evaluations of the impact of the distribution of income, outline the authorities of households, the role of people's savings, determine the resilience of households. The work establishes main assumptions and restrictions of formulating the model of impact of social and economic implications of the COVID-19 pandemic on the poverty of households Conclusion. Taking into consideration the distribution of incomes for various sectors, the proposed model allows to ensure the assessment of losses in the consumption of households, savings depletion and time for their recovery. It has been proven that without the social protection of the population the Corona Crisis will lead to a massive economic shock for the national economy. Prospects of further studies lie in the assessment of the impact of indirect macro-level factors, role of indeterminacy in the decision-making of households and implications in case of numerous waves of social crisis as well as the possible effect in the condition of concurrent exogenous shocks.

scholarly journals One-factor model for default rates by loan type

Bankarstvo ◽  
2021 ◽  
Vol 50 (2) ◽  
pp. 88-100
Author(s):  
Miloš Božović
Keyword(s):  
Factor Model ◽  
Risk Measures ◽  
Loan Default ◽  
Macroeconomic Risk ◽  
Default Rates ◽  
Proposed Model ◽  
Default Rate ◽  
Systemic Component ◽  
Very High

This paper investigates the link between default rates by loan types and the systemic credit risk component. This link is described by a linear model that combines systemic and idiosyncratic contributions. The systemic component is a latent factor that depends directly on the aggregate loan default rate, while the idiosyncratic component drives specific variations of default rates across loan types. By transforming observable risk measures, the model can be econometrically represented as a mixed-effects model, where the systemic and idiosyncratic components represent, respectively, the slope and the intercept that are specific for each loan type individually. The proposed model is illustrated on a panel of defaulted loans of the Association of Serbian Banks. The obtained results show the model's very high power in explaining average default rates for all loan types. Thus, the aggregate default rate plays the role of a unique systemic component that mimics the influence of fundamental macroeconomic risk factors easily, without the necessity to model this relationship explicitly.

Sign in / Sign up

Export Citation Format

Share Document