Sheena S. Iyengar

Sheena S. Iyengar
Columbia University | CU

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82
Publications
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11,461
Citations

Publications

Publications (82)
Article
Full-text available
Pipeline networks are one of the key infrastructures of our modern life. Proactive monitoring and frequent inspection of pipeline networks are very important for sustaining their safe and efficient functionalities. Existing monitoring and maintenance approaches are costly and inefficient because pipelines can be installed in large scale and in an i...
Article
A series of laboratory and field experiments reveal a detrimental effect of presenting options sequentially (one at a time) versus simultaneously (all at once) on choosers’ satisfaction with and commitment to their chosen option. This is because choosers presented with their options simultaneously tend to remain focused on the current set of option...
Article
This paper proposes an integrating mathematical method that unifies a new Contextual Processing model with that of the Spicule visual authentication method. In previous work the Spicule has been initially determined to be much faster at generation of authentication signatures for spatial data than standard encryption methods. It however could be mu...
Article
We consider the problem of constructing a single spanning tree for the single-sink buy-at-bulk network design problem for doubling-dimension graphs. We compute a spanning tree to route a set of demands along a graph G to or from a designated sink node. The demands could be aggregated at (or symmetrically distributed to) intermediate edges where the...
Article
Contextual processing is a new emerging field based on the notion that information surrounding an event lends new meaning to the interpretation of the event. Data mining is the process of looking for patterns of knowledge embedded in a data set. The process of mining data starts with the selection of a data set. This process is often imprecise in i...
Article
This paper studies the optimal inspection of autonomous robots in a complex pipeline system. We solve a 3-D region-guarding problem to suggest the necessary inspection spots. The proposed hierarchical integer linear programming optimization algorithm seeks the fewest spots necessary to cover the entire given 3-D region. Unlike most existing pipelin...
Article
The authors propose that a crowded product space motivates consumers to better discriminate between choice options of different quality. Specifically, this article reports evidence from three controlled experiments and one natural experiment that people are prepared to pay more for high-quality products and less for low-quality products when they a...
Article
Intelligent agents help to automate time and resource consuming tasks such as anomaly detection, pattern recognition, monitoring and decision-making. One of the major issues in automation of cyberspace is the discordance between the concept people use and the elucidation of the corresponding data by existing algorithms. Moreover, the measurement an...
Article
Full-text available
We investigate how making highly consequential, highly undesirable decisions affects emotions and preference for autonomy. We examine individuals facing real or hypothetical decisions to discontinue their infants’ life support who either choose personally or have physicians choose for them. Findings from a multidisciplinary approach consisting of a...
Article
In this work we suggest that trait observability is an important predictor of what kind of feedback will be incorporated into self-knowledge. In two studies we find evidence that feedback about ones own observable traits, referencing social or physical characteristics, becomes incorporated into self-knowledge. In our work, feedback on less observab...
Conference Paper
In this paper, we present the design concept and motion planning of a single-moduled fully autonomous mobile pipeline exploration robot that can be used for the inspection of Φ130~150mm pipelines. In this robot, the four straight wall-press caterpillar wheels are fixed 90 degrees apart in its circumstance and each wheel is operated by two DC motors...
Conference Paper
In the oblivious buy-at-bulk network design problem in a graph, the task is to compute a fixed set of paths for every pair of source-destinations in the graph, such that any set of demands can be routed along these paths. The demands could be aggregated at intermediate edges where the fusion-cost is specified by a canonical (non-negative concave) f...
Article
Belief in one's ability to exert control over the environment and to produce desired results is essential for an individual's wellbeing. It has repeatedly been argued that perception of control is not only desirable, but is also probably a psychological and biological necessity. In this article, we review the literature supporting this claim and pr...
Article
In settings such as investing for retirement or choosing a drug plan, individuals typically face a large number of options. In this paper, we analyze how the size of the choice set influences which alternative is selected. We present both laboratory experiments and field data that suggest larger choice sets induce a stronger preference for simple,...
Article
Full-text available
The explosion of wireless technologies with their ever increasing popularity has made it essential to have vertical handoff solutions where users can move among a choice of networks proficiently and seamlessly. An array of mechanisms supporting vertical handoffs selecting the best promising network interfaces have recently beenanticipated but none...
Article
Purpose – We outline a novel perspective on the role the allocation medium plays in how groups allocate resources fairly. Building upon recent research that demonstrates the unique norms invoked by the resource of money, we propose that what individuals’ judge to be a fair allocation principle among group members systematically varies as a function...
Article
The demand for oil is growing steadily from emerging and developing economies while oil field discoveries continue to decline. Therefore the gap between demand and supply will increase with time. Subsurface Exploration deals with extracting valuable hydrocarbons from oil wells. Due to its hazardous nature, it’s one of the most difficult fields to c...
Article
Full-text available
The demand for oil is growing steadily from emerging and developing economies while oil field discoveries continue to decline. Therefore the gap between demand and supply will increase with time. Subsurface Exploration deals with extracting valuable hydrocarbons from oil wells. Due to its hazardous nature, it’s one of the most difficult fields to c...
Conference Paper
Full-text available
Pipeline-based applications have become an integral part of life. However, knowing that the pipeline systems can be largely deployed in an inaccessible and hazardous environment, active monitoring and frequent inspection of the pipeline systems are highly expensive using the traditional maintenance systems. Robot agents have been considered as an a...
Article
We consider the problem of constructing a single spanning tree for the single-source buy-at-bulk network design problem for doubling-dimension graphs. We compute a spanning tree to route a set of demands (or data) along a graph to or from a designated root node. The demands could be aggregated at (or symmetrically distributed to) intermediate nodes...
Article
Differentiated product models are predicated on the belief that a product's utility can be derived from the summation of utilities for its individual attributes. In one framed field experiment and two natural field experiments, we test this assumption by experimentally manipulating the order of attribute presentation in the product customization pr...
Conference Paper
Full-text available
Pipeline-based applications have become the indispensable part of life. Active monitoring and frequent inspections are critical to maintaining pipeline health. However, these tasks are highly expensive using the traditional maintenance systems, knowing that the pipeline systems can be largely deployed in an inaccessible and hazardous environment. I...
Article
Organized groups face a fundamental problem of how to distribute resources fairly. We found people view it as less fair to distribute resources equally when the allocated resource invokes the market by being a medium of exchange than when the allocated resource is a good that holds value in use. These differences in fairness can be attributed to be...
Conference Paper
Full-text available
In this poster, we demonstrate a novel cost effective, scalable, and customizable RFID-based autonomous pipeline monitoring system, called RAMP system, which combines sensing technologies with robot agent based technologies for efficiently inspecting health related events and RFID technologies for the storage of event related information and locati...
Article
Full-text available
In this paper, we introduce a new paradigm for global computation, one in which the context of collected information drives the type of processing and dissemination the information receives as it is dispersed around the world. The creation of this model has necessitated the development of new types of methods for securing contextual information bec...
Article
A broad range of current airborne gamma ray spectrometry (AGRS) applications involve environmental mapping and mineral exploration. One common goal for such applications is the development of an algorithm for reliable on line classification of radio elements. In this paper, we propose the concept of maximization of correlated information as the sim...
Article
Due to complex nature of resonance region interactions, significant effort has been devoted to quantify the resonance parameter uncertainty information through covariance matrices. Statistical uncertainties arising from measurements contribute only to the diagonal elements of the covariance matrix, but the off-diagonal contributions arise from mult...
Article
What is the effect of option categorization on choosers' satisfaction? A combination of field and laboratory experiments reveals that the mere presence of categories, irrespective of their content, positively influences the satisfaction of choosers who are unfamiliar with the choice domain. This "mere categorization effect" is driven by a greater n...
Article
We examine racial preferences in dating. We employ a Speed Dating experiment that allows us to directly observe individual decisions and thus infer whose preferences lead to racial segregation in romantic relationships. Females exhibit stronger racial preferences than males. The richness of our data further allows us to identify many determinants o...
Conference Paper
Much research work in datamining has gone into improving the predictive accuracy of statistical classifiers by applying the techniques of discretization and feature selection. As a probability-based statistical classification method, the Naive Bayesian classifier has gained wide popularity despite its assumption that attributes are conditionally mu...
Conference Paper
This paper presents a novel approach on bootstrapping chord and other ring-based peer-to-peer (P2P) systems over mobile ad hoc networks (MANETs). Only inter-neighbor communication is used to build the ring topology in node ID space of structured P2P systems. Upon this ring entire chord could be put into normal operation without lengthy stabilizatio...
Article
The provision of choice is one of the most common vehicles through which managers empower employees in organizations. Although past psychological and organizational research persuasively suggests that choice confers personal agency, and is thus intrinsically motivating, emerging research indicates that there could be potential pitfalls. In this cha...
Conference Paper
One of the major conceptual analyses in analytical CRM is customer loyalty. Current methods use user defined and statistical methods for loyalty analysis. One of the major limitations of these methods is that they assign every customer into exactly one segment, which may be counter intuitive. In this paper a novel approach using fuzzy logic has bee...
Conference Paper
Naive Bayes classifier has gained wide popularity as a probability-based classification method despite its assumption that attributes are conditionally mutually independent given the class label. This paper makes a study into discretization techniques to improve the classification accuracy of Naive Bayes with respect to medical datasets. Our experi...
Article
Wireless sensor networks have the potential to become significant subsystems of ecological experiment. Sensor networks consist of large number of tiny sensor nodes, all of which have sensing capabilities. These networks allow coordinated signal detection, monitoring, and tracking to enable sensor nodes to simultaneously capture geographically disti...
Article
Full-text available
The provision of choice in terms of how people use goods and services has been proposed as a vehicle of improvement of social welfare. This article highlights some of the costs and benefits of creating choice, and it discusses how much choice policy makers and other agents (e.g., employers, retailers) should ideally grant and in what form they shou...
Article
Expanding upon Simon's (1955) seminal theory, this investigation compared the choice-making strategies of maximizers and satisficers, finding that maximizing tendencies, although positively correlated with objectively better decision outcomes, are also associated with more negative subjective evaluations of these decision outcomes. Specifically, in...
Article
We study dating behavior using data from a Speed Dating experiment where we generate random matching of subjects and create random variation in the number of potential partners. Our design allows us to directly observe individual decisions rather than just final matches. Women put greater weight on the intelligence and the race of partner, while me...
Article
In settings such as investing for retirement or choosing a drug plan, individuals face a staggering number of options. In this paper, we analyze how an abundance of options influences which alternative is selected. We present both laboratory experiments and field data that confirm our theoretical prediction: larger choice sets induce a stronger pre...
Article
In this paper, we examine people’s appraisals of unusual objects and their intuitions about whether others will like those objects. Prior work suggests uniqueness motives (e.g., Need for Uniqueness) affect appraisals, but the effect of these motives on projection of appraisals to others is unclear. Contrary to some prior work, we argue that uniquen...
Article
Full-text available
Age differences in intrinsic and extrinsic motivation and the relationships of each to academic outcomes were examined in an ethnically diverse sample of 797 3rd-grade through 8th-grade children. Using independent measures, the authors found intrinsic and extrinsic motivation to be only moderately correlated, suggesting that they may be largely ort...
Article
Psychological research has repeatedly demonstrated two seemingly irreconcilable human tendencies. People are motivated towards internal consistency, or acting in accordance with stable, self-generated preferences. Simultaneously though, people dem- onstrate considerable variation in the content of their preferences, often induced by subtle external...
Article
We show that immigrant managers are substantially more likely to hire immigrants than are native managers. The finding holds when comparing establishments in the same 5-digit industry and location, when comparing different establishments within the same firm, when analyzing establishments that change management over time, and when accounting for wi...
Article
Energy is a critical resource in wireless sensor networks. In this paper, we propose a new approach to maintain network wide energy equivalence and maximize network lifetime. Compared to existing protocols, our approach emphasizes on route maintenance instead of route finding. This means no critical nodes would become the bottleneck of network life...
Article
We examine racial preferences in dating using data that allow for the direct observation of decisions of randomly paired individuals in a Speed Dating experiment. Females exhibit stronger racial preferences than males. Furthermore, we observe stronger same race preferences for blacks and Asians than for Hispanics and whites. Accounting for self-rep...
Article
Analysis of heart rate variation (HRV) has become a popular non-invasive tool for assessing the activities of the autonomic nervous system (ANS). HRV analysis is based on the concept that fast fluctuations may specifically reflect changes of sympathetic and vagal activity. It shows that the structure generating the signal is not simply linear, but...
Article
The present study sought to examine the relationship between managers’ perceptions of employee motivation and performance appraisal by surveying managers and employees in three distinct cultural regions (North America, Asia, and Latin America) within a single global organization. Three distinct cultural patterns emerged in the theories managers’ he...
Article
The electrocardiogram (ECG) is a representative signal containing information about the condition of the heart. The shape and size of the P-QRS-T wave, the time intervals between its various peaks etc. may contain useful information about the nature of disease afflicting the heart. However, these subtle details can not be directly monitored by t...
Article
Analysis of heart rate variation (HRV) has become a popular non-invasive tool for assessing the activities of the autonomic nervous system (ANS). HRV analysis is based on the concept that fast fluctuations may specifically reflect changes of sympathetic and vagal activity. It shows that the structure generating the signal is not simply linear, but...
Article
We show that immigrant managers are substantially more likely to hire immigrants than are native managers. The finding holds when comparing establishments in the same 5-digit industry and location, when comparing different establishments within the same firm, when analyzing establishments that change management over time, and when accounting for wi...
Article
We show that the Bandwidth Allocation problem in the ATM network model is NPComplete. Based on that inference we suggest using the Genetic Algorithm technique to select a subset of calls from the set of incoming call requests for transmission, so that the available network bandwidth is utilized effectively, thus maximizing the revenue generated whi...
Article
This paper explores an image processing application of optimization techniques which entails interpreting noisy sensor data. The application is a generalization of image correlation; we attempt to find the optimal gruence which matches two overlapping gray scale images corrupted with noise. Both tabu search and genetic algorithms are used to find t...
Article
The Petersen graph is gaining popularity as an interconnection network because of its several interesting properties. The recursive Petersen architecture is very compact and has some very interesting topological properties. In this paper, we study its topological properties in detail. Two labeling schemes are suggested. Basic routing and broadcasti...
Article
Combinatorial structure of visibility is probably one of the most fascinating and interesting areas of engineering and computer science. The usefulness of visibility graphs in computational geometry and robotic navigation problems like motion planning, unknown-terrain learning, shortest-path planning, etc., cannot be overstressed. The visibility gr...
Article
The process of gradually settling a combinatorial system into configurations of globally minimum energy has variously been called simulated annealing, statistical cooling, and so on. In the past, very large combinatorial optimization problems have been solved using this technique. It has also been shown that this method is effective in obtaining cl...
Article
We address the problem of collision free navigation of a point robot among polygonal obstacles in a bounded known terrain in two dimensional space. The obstacles could be convex or concave polygons. We consider a combinatorial approach to the problem and focus on partitioning the terrain into distinct regions and encoding these regions. We then bui...
Article
The quest for efficient real-time response by autonomous robots in hazardous environments necessitates not only fast computational schemes in expert systems but also requires insights on high performance data structures and concurrent algorithms that lead to elegant problem-solving methods in the AI discipline. towards this objective, this paper pr...
Article
The search for efficient bounds for VLSI problems has spawned an increasingly important research area. In this paper, we derive an asymptotic equality for the number of necklaces in a shuffle-exchange network, and provide a formula for the number of necklaces of a given length. This symptotic equality for the number of necklaces is an extension to...
Conference Paper
The core of the navigation program for the Oak Ridge CESAR (Center for Engineering Systems Advanced Research) robots is a production system developed on the expert system shell CLIPS, which runs on an NCUBE hypercube aboard the robot. The production system can call on C-compiled navigation procedures. The production rules can read the sensor data a...
Article
The distribution of breaks along The DNA strand in hydrodynamic shearing is unknown, and there is no real-world experiment which could directly determine this distribution. This paper presents an extension of the simulation model for hydrodynamic shearing of DNA reported in [1,2]. An empirical model is presented showing a good linear relationship b...
Article
This paper presents an extension of the distribution proposed during hydrodynamic shearing of DNA. In the Fourier least square approximation of uniform random distribution or a square wave, Gibb's phenomena occur at the boundaries. The same behavior occurs at the boundaries of the DNA strands undergoing hydrodynamic shearing of DNA. This hypothesis...
Article
A computer simulation model for the hydrodynamic shearing of DNA is presented. In this model the event space consists of a number of positions at which the DNA strand may break. The results of the model compared with the real world result are reported in this paper. Future endeavors to generalize the model would add significantly to the model's val...
Article
Reviews the research associated with self-determination or choice to document the pervasive, normative view that choice is "good." The authors question this view by pointing to cultural differences: Western cultures put a premium on personal independence and uniqueness; non-Western cultures value interdependence and connectedness with one's own gro...
Article
A considerable amount of work has been reported on the problem of robot navigation in known static terrains. Algorithms have been proposed and implemented to search for an optimum path to the goal, taking into account the finite size and shape of the robot. Not as much work has been reported on robot navigation in unknown, unstructured, or dynamic...
Article
Full-text available
camps have shared, however, is a willingness to speak of an abstract, decontextualized self, and perhaps even more remarkably, of an abstract, undifferentiatedother. The recent flowering of cultural psychology,ingeneral (Fiske et al. 1997; Shweder 1991; Stigler, Shweder, and Herdt 1990; Triandis 1995), and the increasing attention to different cult...
Article
Full-text available
Analysis of heart rate variation (HRV) has become a popular non-invasive tool for assessing the activities of the autonomic nervous system (ANS). HRV analysis is based on the concept that fast fluctuations may specifically reflect changes of sympathetic and vagal activity. It shows that the structure generating the signal is not simply linear, but...
Article
Customer Relationship Management (CRM) aims at optimizing the customer value in an organization by data analysis and communication. One important task of CRM is customer value analysis, which is used to iden tify the value of customers in different segments. In this paper an attempt has been made to develop a framework for value analysis using fuzz...

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