Facilitating the Search for Partners on Matching Platforms

2021 ◽  
Author(s):  
Yash Kanoria ◽  
Daniela Saban
Keyword(s):  
Stochastic Models ◽  
Search Model ◽  
Pareto Improvement ◽  
Short Side ◽  
Search Effort ◽  
Potential Partner ◽  
Strategic Agents ◽  
Evolutionarily Stable ◽  
Do So

Two-sided matching platforms can control and optimize over many aspects of the search for partners. To understand how matching platforms should be designed, we introduce a dynamic two-sided search model with strategic agents who must bear a cost to discover their value for each potential partner and can do so nonsimultaneously. We characterize evolutionarily stable stationary equilibria and find that, in many settings, the platform can mitigate wasted search effort by imposing suitable restrictions on agents. In unbalanced markets, the platform should force the short side of the market to initiate contact with potential partners, by disallowing the long side from doing so. This allows the agents on the long side to exercise more choice in equilibrium. When agents are vertically differentiated, the platform can significantly improve welfare even in the limit of vanishing screening costs by forcing the shorter side of the market to propose and by hiding information about the quality of potential partners. Furthermore, a Pareto improvement in welfare is possible in this limit. This paper was accepted by Baris Ata, stochastic models and simulation.

The theater of memory: Direct speech in Palestinian oral history

2018 ◽  
Vol 13 (4) ◽  
pp. 633-648
Author(s):  
Kobi Peled
Keyword(s):  
Oral History ◽  
Striking Feature ◽  
Direct Speech ◽  
The Past ◽  
Theatrical Performance ◽  
Main Thing ◽  
Significant Figures ◽  
Arabic Speaking ◽  
Do So

A striking feature of Palestinian oral history projects is the extensive use that interviewees make of direct speech to communicate their memories—especially those born before the 1948 Arab–Israeli war. They do so irrespective of whether or not they participated in or actually heard the dialogues they wish to convey. This article seeks to characterize and explain this phenomenon. In the interviews conducted by the author—an Arabic-speaking Jew—as well as in other projects, this mode of speech is marked by ease of transition from character to character and between different points in time. It clearly gives pleasure to those engaged in the act of remembering, and it grades readily into a theatrical performance in which tone of speech and the quality of the acting become the main thing. This form of discourse sprang up from the soil of a rural oral culture and still flourishes as a prop for supporting memory, a vessel for collecting and disseminating stories, and a technique for expressing identification with significant figures from the past.

Stochastic hydrology-how much hydrology does it contain and how much does it matter?

1984 ◽  
Vol 16 (1) ◽  
pp. 19-19
Author(s):  
V. Klemeš
Keyword(s):  
Water Management ◽  
Probability Theory ◽  
Stochastic Models ◽  
Mathematical Statistics ◽  
Stochastic Hydrology ◽  
Management Decisions ◽  
Quality Of Water ◽  
The Way

Most of what is routinely labeled ‘stochastic hydrology’ does not contain any hydrology at all and could be more properly identified as the fitting of stochastic models to samples of data of hydrologic origin. T0 engage in this enterprise, no hydrologic knowledge is necessary, nor do the results contribute to hydrologic knowledge. Moreover, the bulk of the current stochastic hydrology does not appreciably enhance the quality of water management decisions-an aim which provided the original impetus for its development. It seems that the mainstream of stochastic hydrology follows in the steps of ‘dam theory’, the only difference being that while the latter has become a self-contained branch of pure probability theory, the former is on the way to becoming a branch of pure mathematical statistics.

Materials Science and Engineering Education

MRS Bulletin ◽  
1992 ◽  
Vol 17 (9) ◽  
pp. 18-21 ◽  
Author(s):  
R. Abbaschian
Keyword(s):  
Quality Of Life ◽  
Iron Age ◽  
Materials Science ◽  
Critical Role ◽  
Economic Security ◽  
Intraocular Lenses ◽  
Science And Engineering ◽  
Materials Science And Engineering ◽  
Do So

Materials science and engineering (MSE), as a field as well as a discipline, has expanded greatly in recent years and will continue to do so, most likely at an even faster pace. It is now well-accepted that materials are crucial to the national defense, to the quality of life, and to the economic security and competitiveness of the nation. Mankind has recognized the importance of manmade materials to the quality of life for many centuries. In many cases, the security and defense of tribes and nations have substantially depended on the availability of materials. It is not surprising that historical periods have been named after materials—the Bronze Age, the Iron Age, etc. The major requirements from materials in those days were their properties and performance. Today, in this age of advanced materials, the importance of materials to defense and quality of life has not changed. However, the critical role of materials has taken an additional dimension: it has become essential to enhancing industrial competitiveness.The knowledge base within MSE has also expanded vastly throughout these years and continues to do so at an increasing rate. We are constantly gaining a deeper understanding of the fundamental nature of materials, developing new ways to produce and shape them for applications extending from automobiles to supersonic airplanes, optoelectronic devices to supercomputers, hip implants to intraocular lenses, or from household appliances to gigantic structures. We are also learning that, in many of these applications, we need to depend on the combinations or composites of different classes of materials (metals, ceramic, polymers, and electronic materials) to enhance their properties.

Catalog Design: Design Using Available Assets

1992 ◽  
Author(s):  
S. Vadde ◽  
J. K. Allen ◽  
F. Mistree
Keyword(s):  
Deterministic Model ◽  
Limited Resources ◽  
Complex Task ◽  
Cooling Fluid ◽  
Selection Problems ◽  
Catalog Design ◽  
Standard Framework ◽  
Selection Of ◽  
Do So

Abstract Catalog design is a procedure in which a system is assembled by selecting standard components from catalogs of available components. Selection in design involves making a choice among a number of alternatives taking into account several attributes. The information available to a designer to do so during the early stages of project initiation may be uncertain. The uncertainty in information may be imprecise or stochastic. Under these circumstances, a designer has to balance limited resources against the quality of solution obtained or decisions made by accounting for uncertainty in information available. This complex task becomes formidable when dealing with coupled selection problems, that is problems that should be solved simultaneously. Coupled selection problems share a number of coupling attributes among them. In an earlier paper we have shown how selection problems, both coupled and uncoupled can be reformulated as a single compromise Decision Support Problem (DSP) using a deterministic model. In this paper, we show how the traditional compromise DSP can be extended to represent a nondeterministic case. We use fuzzy set theory to model imprecision and Bayesian statistics to model stochastic information. Formulations that can be solved with the same solution scheme are presented to handle both fuzzy and stochastic information in the standard framework of a compromise DSP. The approaches are illustrated by an example involving the coupled selection of a heat exchanger concept and a cooling fluid for a specific application. The emphasis in this paper is placed on explaining the methods.

Creative Participation and the Expansion of Political Engagement

2021 ◽  
Author(s):  
Yannis Theocharis ◽  
Joost de Moor
Keyword(s):  
Political Participation ◽  
Public Space ◽  
Common Good ◽  
Political Engagement ◽  
Research Topic ◽  
The Common ◽  
Catch Up ◽  
Ongoing Assessment ◽  
Do So

Creative participation refers to citizens’ invention of, and engagement in, new action forms that aim to influence, or take responsibility for, the common good in society. By definition, these action forms are constantly evolving and cannot be listed or summarized. Yet some, like guerrilla gardening, have over time become more established in political repertoires, and specific arenas are known to be particularly productive sites for their development. These include in particular the Internet, and lifestyles and consumption. The constant changes in how citizens become active represented by creative participation present considerable challenges for scholars of political participation—both in terms of theory and methodology. In particular, such forms test our ability to distinguish political from nonpolitical activities. However, how political creative participation is, is often subtle and implicit, and therefore hard to establish. Yet being able to do so is essential for an ongoing assessment of the quality of participatory democracy. With conventional forms of participation declining and creative participation becoming more common, scholars must be able to agree on definitions and operationalizations that allow for the comparison of participatory trends. For instance, a key concern has been whether creative forms of participation crowd out more conventional ones, like voting or lobbying politicians. Developments in survey research have been able to show that this is not the case and that creative participation may in fact increase conventional participation. In addition, qualitative research methods like focus groups and ethnography, allow for more open-ended explorations of this elusive research topic. As to who participates, creative participation has enabled traditionally underrepresented groups like women and young people to catch up with, and sometimes overtake, those older men who have long dominated conventional political participation. Still, education remains a key obstacle even to creative participation. The COVID-19 crisis that took hold of the world in 2020 has compromised access to collective action and public space. It has thereby once more put the onus on citizens to engage creatively with ways to influence, and take responsibility for, society. At the same time, the crisis presents a need and opportunity for political participation scholarship to engage more deeply with theoretical debates about what it means to be political or to participate.

scholarly journals Impacts of stochastic models on real-time 3D UAV mapping

2014 ◽  
Vol XL-1 ◽  
pp. 35-44
Author(s):  
M. Alqurashi ◽  
J. Wang
Keyword(s):  
Stochastic Model ◽  
Real Time ◽  
Stochastic Models ◽  
Feature Matching ◽  
Critical Role ◽  
Image Feature ◽  
Mapping Process ◽  
Camera Orientation ◽  
Camera Position

In UAV mapping using direct geo-referencing, the formation of stochastic model generally takes into the account the different types of measurements required to estimate the 3D coordinates of the feature points. Such measurements include image tie point coordinate measurements, camera position measurements and camera orientation measurements. In the commonly used stochastic model, it is commonly assumed that all tie point measurements have the same variance. In fact, these assumptions are not always realistic and thus, can lead to biased 3D feature coordinates. Tie point measurements for different image feature objects may not have the same accuracy due to the facts that the geometric distribution of features, particularly their feature matching conditions are different. More importantly, the accuracies of the geo-referencing measurements should also be considered into the mapping process. In this paper, impacts of typical stochastic models on the UAV mapping are investigated. It has been demonstrated that the quality of the geo-referencing measurements plays a critical role in real-time UAV mapping scenarios.

scholarly journals Experimental evaluation of the light sword lens performance with a variable pupil size

2018 ◽  
Vol 10 (2) ◽  
pp. 36 ◽  
Author(s):  
Walter Torres-Sepúlveda ◽  
Alejandro Mira-Agudelo ◽  
John Fredy Barrera ◽  
Andrzej Kolodziejczyk
Keyword(s):  
New York ◽  
Experimental Study ◽  
Pupil Size ◽  
Focal Depth ◽  
Optical Element ◽  
Depth Of Focus ◽  
Variable Diameter ◽  
Diffraction Structure ◽  
Do So

This paper presents an experimental study designed to test the performance of the light sword lens (LSL) with different pupil sizes. To do so, Snellen optotype images obtained by a monofocal lens either with or without an LSL, were compared. Images were obtained for three different pupil sizes at several target vergences. The correlation coefficient and through-focus curves were obtained and compared. The experimental results show differences in the contrast and the depth of focus with different pupil sizes using the monofocal lens without an LSL. In contrast, when using the monofocal lens in combination with the LSL, the quality of the images is similar for all pupils and target vergences used, with slight differences only in halos and contrast. Full Text: PDF ReferencesG. Mikula, Z. Jaroszewicz, A. Kolodziejczyk, K. Petelczyc, M. Sypek, G. P. Agrawal, "Imaging with extended focal depth by means of lenses with radial and angular modulation", Opt Express 15, 9184, (2007). CrossRef A. Kolodziejczyk, S. Bará, Z. Jaroszewicz, M. Sypek, "The Light Sword Optical Element—a New Diffraction Structure with Extended Depth of Focus", J. Mod Opt. 37, 1283, (1990). CrossRef K. Petelczyc et al, "Presbyopia compensation with a light sword optical element of a variable diameter", Photonics Lett. Pol. 1, 55 (2009). DirectLink A. Mira-Agudelo et al, "Compensation of Presbyopia With the Light Sword Lens", Invest Ophthalmol Vis Sci 57, 6871, (2016). CrossRef R.A. Fisher, Statistical Methods for Research Workers (New York, Hafner, 13th Ed., 1958) CrossRef

Horatian Notes IV: despised readings in the manuscripts of Satires Book 1

1987 ◽  
Vol 33 ◽  
pp. 16-37
Author(s):  
C.O. Brink
Keyword(s):  
Good Sense ◽  
Half Century ◽  
The Right ◽  
Do So

In three earlier instalments of these ‘Horatian Notes’ (1969, 1971, 1982) I have tried to weigh the claims to truth of manuscript variants in the transmitted text of Odes and Epodes. In the Satires there is so much of that sort of thing that I have had to restrict myself to Book 1. Now, as well as earlier, disagreements with the decisions of all or most contemporary editors arise. I note, however, that this paper was written before D. R. Shackleton Bailey's edition appeared in 1985. Readers of the present notes will find that we have come, independently if perhaps unsurprisingly, to similar conclusions on a number of passages.There is then much to say, and because of a plethora of evidence I do not propose to comment on the numerous cases where editors of the last half-century or so make what I regard as the right choice, yet, in one way or another, give rise to the suspicion that they do so for the wrong reasons. Thus at 1.1.38 very few editors now follow Keller and Vollmer, not to mention many of their early predecessors, in printing patiens to describe ‘the tiny ant’ in the animal fable designed to illustrate human failings. With Lambinus and Bentley, they do now print sapiens; yet a perusal of commentaries shows how right was A. Palmer, not usually a herald of Bentley's virtues, to refer to Bentley's note both in his app. crit. and his commentary. It is possible to print sapiens and yet to misunderstand it as ‘prudent, thrifty’; so e.g. L. Mueller. A reference to Bentley (and here also to Lambinus), which can be provided briefly in an app. crit. as much as in a commentary, is here and often elsewhere a reminder of good sense. Nevertheless, in order to save space I pass by such cases in this paper. Nor, as a rule, do I discuss cases where the quality of variants, whether preserved directly or indirectly, happens to be more or less balanced.

Early Childhood Education and Child Care in Arizona : Is Availability Alone Sufficient?

2020 ◽  
Vol 2 (1) ◽  
Author(s):  
Kathryn Chapman ◽  
◽  
Margarita Pivovarova ◽  
Keyword(s):  
Early Childhood ◽  
Child Care ◽  
Early Childhood Education ◽  
Value Of Information ◽  
Household Level ◽  
Childhood Education ◽  
Quality Rating ◽  
The Relationship ◽  
Do So

With many states increasingly adopting Quality Rating and Improvement Systems (QRIS) to rate their early childhood education (ECE) and child care programs, researchers question the use of these systems. Specifically, they are trying to understand the value of information provided by QRIS ratings and the implications QRIS ratings have on the quality of and access to ECE and child care programs for families. In this study, we attempt to understand the value of QRIS ratings when they are provided for families at the household level. To do so we take a close look at the relationship between availability of programs rated by the Quality Improvement and Rating System (QIRS) in Arizona and demographics of the communities they serve, and compare the utilization of the programs in communities with varying demographic compositions. While we find that more high-quality ECE and child care programs are available for children that are Hispanic, Black, and eligible for free and reduced-price lunch, we also find that families underutilized those programs. We argue that this underutilization might be due to a variety of barriers that the families are experiencing and believe that efforts should be directed to work with families and assist them in understanding their enrollment options.

Automatic IQ Estimation Using Stylometric Methods

2019 ◽  
pp. 32-45 ◽  
Author(s):  
Polina Shafran Abramov ◽  
Roman V. Yampolskiy
Keyword(s):  
Computer Science ◽  
Educational Tool ◽  
Forensic Evidence ◽  
Text Features ◽  
High Degree ◽  
Iq Estimation ◽  
The Average Range ◽  
Do So ◽  
Wide Exposure

Stylometry is a study of text linguistic properties that brings together various fields of research such as statistics, linguistics, computer science and more. Stylometry methods have been used for historic investigation, as forensic evidence and an educational tool. This chapter presents a method to automatically estimate individual's IQ based on quality of writing and discusses challenges associated with it. The method utilizes various text features and NLP techniques to calculate indexes which are used to estimate individual's IQ. The results show a high degree of correlation between expected and estimated IQs in cases when IQ is within the average range. Obtaining good estimation for IQs on the high and low ends of the spectrum proves to be more challenging and this work offers several reasons for that. Over the years stylometry benefitted from wide exposure and interest among researches, however it appears that there aren't studies that focus on using stylometry methods to estimate individual's intelligence. Perhaps this work presents the first in-depth attempt to do so.

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