Digital Commons Network^™

Interview No. 1388, Maria Zarate

Combined Interviews

Maria Zarate was born in Paracho, Michoacán, México. Her father worked as a bracero in the United States. At a young age her father pasted away, for this reason she started working with her brothers caring for animal and planting seeds. At an age of twenty, she married for the first time. One year later, her husband passed away. Eight years later she married a second time only to take care of her second husband’s daughters. Her second husband, Federico worked as a bracero in the United States in 1954. Ms. Zarate lasted long periods of time without her husband …

Estimating Risk Under Interval Uncertainty: Sequential And Parallel Algorithms, Vladik Kreinovich, Hung T. Nguyen, Songsak Sriboonchitta

Departmental Technical Reports (CS)

In traditional econometrics, the quality of an individual investment -- and of the investment portfolio -- is characterized by its expected return and its risk (variance). For an individual investment or portfolio, we can estimate the future expected return and a future risk by tracing the returns x₁, ..., x_n of this investment (and/or similar investments) over the past years, and computing the statistical characteristics based on these returns. The return (per unit investment) is defined as the selling of the corresponding financial instrument at the ends of, e.g., a one-year period, divided by the buying price …

Intelligence Techniques Are Needed To Further Enhance The Advantage Of Groups With Diversity In Problem Solving, Oscar Castillo, Patricia Melin, J. Esteban Gamez, Vladik Kreinovich, Olga Kosheleva

Departmental Technical Reports (CS)

In practice, there are many examples when the diversity in a group enhances the group's ability to solve problems -- and thus, leads to more efficient groups, firms, schools, etc. Several papers, starting with the pioneering research by Scott E. Page from the University of Michigan at Ann Arbor, provide a theoretical justification for this known empirical phenomenon. However, when the general advise of increasing diversity is transformed into simple-to-follow algorithmic rules (like quotas), the result is not always successful. In this paper, we prove that the problem of designing the most efficient group is computationally difficult (NP-hard). Thus, in …

Mathematical Justification Of Spectral/Covariance Techniques: On The Example Of Arc Detection, Jan Beck, David Nemir, Vladik Kreinovich

Departmental Technical Reports (CS)

Detecting arcing faults is an important but difficult-to-solve practical problem. Many existing methods of arc detection are based upon acquiring a signal that is proportional to current and then making an analysis of the signal's power spectrum (or, equivalently, its covariance function). Since the power spectrum, i.e., the absolute values of the Fourier transform, carries only partial information about the signal, a natural question is: why should we restrict ourselves to the use of this partial information? A related question is caused by the fact that even the most efficient methods still miss some arcing faults and/or lead to false …

Computing With Tensors: Potential Applications Of Physics-Motivated Mathematics To Computer Science, Martine Ceberio, Vladik Kreinovich

Departmental Technical Reports (CS)

In this paper, we explain what are tensors and how tensors can help in computing.

Interview No. 1421, Ramiro Solis

Combined Interviews

Ramiro Solis was born on December 28, 1922 in Tekax Yucatán, México attended school and learned to read and write, however, after his father passed away, everyone in the family had to start working. Ramiro left school to work with his father’s former Chinese countrymen who paid Ramiro $0.02 cents a row for harvesting herbs and he would earn $0.10 -$0.12 cents a day for his work. He went on to work as a roper (one who makes ropes) in Mérida, Yucatán. Then there was a decline in jobs, and the Mexican government began pushing for unemployed men to enter …

Interview No. 1424, Feliciano Zarupe

Combined Interviews

Feliciano never went to school and from a very young age he began working, collecting resin from pine trees so it could be processed for various needs. Feliciano entered the Bracero Program in 1960 and the first part of the recruitment process, the physical examination, took place in Empalme. Then they were sent to Calexico where they were dusted against lice. Feliciano first went to Oxnard in Parque del Sol when he arrived in the United States and then was sent to Lompoc in Santa Maria county, California where he worked harvested lettuce for 45 days. A typical day began …

Interview No. 1100, Margarita Flores

Combined Interviews

Ms. Flores briefly recalls her childhood and the financial difficulties her parents endured; Ms. Flores recalls that she and her mother were in the United States without documentation; her father went through the contracting center in Juárez, Chihuahua, México; upon being hired, he was sent to Rio Vista, a processing center in Socorro, Texas; she and her parents were allowed to reside at Sparks Ranch, while the majority of the other braceros were transported to another camp; her mother’s primary duties on the ranch consisted of cooking for the braceros; as a bracero, her father completed one contract and labored …

Interview No. 1423, Ben Zapata

Combined Interviews

Benjamin Zapata was born in 1935 in the Yucatán. In the village that Benjamin lived, they worked in in making hats and head gear. Benjamin had friends who came into the Bracero Program and convinced him to join as well. In 1958, Benjamin decided to join the Bracero Program and he went to Empalme Sonora, México to register for the Bracero Program. From there Benjamin went to Mexicali, México and then he crossed the border and traveled to San Joaquin and Tracy, California. His first job had Benjamin picking tomatoes, that contract lasted for forty-five days. At the end of …

A New Simplified Derivation Of Nash Bargaining Solution, Tanja Magoc, Vladik Kreinovich

Departmental Technical Reports (CS)

In the 1950s, the Nobel Prize winner John F. Nash has shown that under certain conditions, the best solution to the bargaining problem is when the product of the (increase in) utilities is the largest. Nash's derivation assumed that we are looking for strategies that assign a single situation to each bargaining situation. In this paper, we propose a simplified derivation of Nash bargaining solution that does not requires this assumption.

An Aspect-Based Approach To Checking Design Constraints At Run-Time, Yoonsik Cheon, Carmen Avila, Steve Roach, Cuauhtemoc Munoz, Neith Estrada, Valeria Fierro, Jessica Romo

Departmental Technical Reports (CS)

Design decisions and constraints of a software system can be specified precisely using a formal notation such as the Object Constraint Language (OCL). However, they are not executable, and assuring the conformance of an implementation to its design is hard. The inability of expressing design constraints in an implementation and checking them at runtime invites, among others, the problem of design drift and corrosion. We propose runtime checks as a solution to mitigate this problem. The key idea of our approach is to translate design constraints written in a formal notation such as OCL into aspects that, when applied to …

On Chromatic Numbers Of Space-Times: Open Problems, Olga Kosheleva, Vladik Kreinovich

Departmental Technical Reports (CS)

No abstract provided.

A Paradox Of Altruism: How Caring About Future Generations Can Result In Poverty For Everyone (Game-Theoretic Analysis), Tanja Magoc, Vladik Kreinovich

Departmental Technical Reports (CS)

Political and social activists are rightfully concerned about future generations: whenever a country borrows money, or an environmental situation worsens, this means, in effect, that we impose an additional burdens on future generations. There is clearly a conflict between the present generation's actions and interests and the welfare of the future generations. There exists a mathematical toolbox that provides solutions to many well-defined conflict situations: namely, the toolbox of game theory. It therefore seems reasonable to apply game theory techniques to the conflict between the generations. In this paper, we show that we need to be very cautious about this …

Borderplex Economic Outlook: 2008-2010, Thomas M. Fullerton Jr.

Border Region Modeling Project

No abstract provided.

Viability Of Travel-Time Sensitivity Testing For Estimating Uncertainty Of Tomographic Velocity Models: A Case Study, Matthew G. Averill, Kate C. Miller, Vladik Kreinovich, Aaron A. Velasco

Departmental Technical Reports (CS)

Seismic tomography is now a common approach to estimating velocity structure of the Earth, regardless of whether the data sources are earthquake recordings or controlled sources such as explosions, airguns or Vibroseis. Seismic tomography is convenient to implement because it requires little to no a priori knowledge of Earth structure and is much less time consuming than forward modeling schemes. Despite its convenience, the method still lacks satisfactory quantitative assessments of model reliability. Here we explore the viability of applying travel-time sensitivity testing that uses a modified Cauchy distribution as its statistical foundation to assessing the uncertainty in velocity models …

Interview No. 1418, Porfirio Z. Rico

Combined Interviews

Porfirio Rico was born in Jéruco Michoacán, México on September 14, 1914. He attended school until the second grade when Porfirio was taken out of school so he could learn to tend to animals and do housework and light field work. When he was about 10 or 11 years old, Porfirio worked with his grandfather, earning $.15 cents an hour. Porfirio worked in various places such as Morelia, Irapuato Guanajuato, Guadalajara, Aguascalientes in México. Porfirio heard about the Bracero Program and decided to give it a try because the work in México was becoming very hard to come by. When …

Asymmetric Information Measures: How To Extract Knowledge From An Expert So That The Expert's Effort Is Minimal, Hung T. Nguyen, Vladik Kreinovich, Elizabeth N. Kamoroff

Departmental Technical Reports (CS)

Knowledge acquisition is when we ask experts questions, and put the answers into the computer system. Since this is a very time-consuming task, it is desirable to minimize the effort of an expert.

As a crude estimate for this effort, we can take a number of binary (yes-no) questions that we ask. The procedure that minimizes this number is binary search.

This approach does not take into account that people often feel more comfortable answering "yes" than answering "no". So, to make our estimates more realistic, we will take into consideration that for a negative answer the effort is bigger. …

Current Financial Crisis And Inadequate Uncertainty Processing: A Comment, Tanja Magoc, Vladik Kreinovich

Departmental Technical Reports (CS)

No abstract provided.

City Of El Paso: Cross Sectional Comparison Of Bilingualism In The Workplace, Elizabeth K. Gibson, Carlos Olmedo, Mario E. Caire

IPED Technical Reports

The Institute for Policy and Economic Development (IPED) at the University of Texas at El Paso conducted an analysis of bilingualism in the workplace between El Paso and other regions. This study, performed for the City of El Paso Department of Economic Development, highlights El Paso’s bilingual workforce in 22 occupational groups and 20 industry sectors and makes cross-sectional comparisons to 19 Metropolitan Statistical Areas (MSAs) that are in geographic proximity or contain a high number or percentage of Spanish-speaking populations. In addition, detailed occupations and detailed industries are reported for El Paso that offer English-Spanish bilinguals good wages, contain …

2008 Utep/Ut-Austin Football Game: Economic Impact On El Paso, Texas, David A. Schauer, Carlos Olmedo, Mario Caire, Guadalupe Corral, Dennis L. Soden

IPED Technical Reports

No abstract provided.

Interview No. 1420, Eduardo Saldaña

Combined Interviews

Eduardo was born in a town (rancho) called Ojos de Agua, located within the Greater México City urban area, in 1920. From the age of five, Eduardo worked with him father, brothers and uncles sowing and plowing in México. When he was 16, he moved to México City. In 1943 after hearing about the Bracero Program in a national ad, Eduardo took a chance to make more money and have a better opportunity through the program. Eduardo and one of his brothers came to the United States via train and were provided food during their travel, courtesy of their new …

Computational Methods For Investment Portfolio: The Use Of Fuzzy Measures And Constraint Programming For Risk Management, Tanja Magoc, Francois Modave, Martine Ceberio, Vladik Kreinovich

Departmental Technical Reports (CS)

Computational intelligence techniques are very useful tools for solving problems that involve understanding, modeling, and analysis of large data sets. One of the numerous fields where computational intelligence has found an extremely important role is finance. More precisely, optimization issues of one's financial investments, to guarantee a given return, at a minimal risk, have been solved using intelligent techniques such as genetic algorithm, rule-based expert system, neural network, and support-vector machine. Even though these methods provide good and usually fast approximation of the best investment strategy, they suffer some common drawbacks including the neglect of the dependence among among criteria …

Maximum Entropy In Support Of Semantically Annotated Datasets, Paulo Pinheiro Da Silva, Vladik Kreinovich, Christian Servin

Departmental Technical Reports (CS)

One of the important problems of semantic web is checking whether two datasets describe the same quantity. The existing solution to this problem is to use these datasets' ontologies to deduce that these datasets indeed represent the same quantity. However, even when ontologies seem to confirm the identify of the two corresponding quantities, it is still possible that in reality, we deal with somewhat different quantities. A natural way to check the identity is to compare the numerical values of the measurement results: if they are close (within measurement errors), then most probably we deal with the same quantity, else …

Trustmap: Towards Trust Recommendations For Maps, Paulo Pinheiro Da Silva, Nicholas Ricky Del Rio, Vladik Kreinovich, Alejandro Castaneda

Departmental Technical Reports (CS)

The web is a rich environment for exchanging spatial information. When spatial information is shared in the form of images, i.e., maps, these images almost never come with meta-information about how they were generated. This kind of meta-information is often called knowledge provenance. Access to knowledge provenance may facilitate users to make informed decisions about the quality of maps. In this paper, we propose TrustMap, a new approach for enhancing maps with trust recommendations. For a given map, TrustMap can generate recommendations from the knowledge provenance and a network of trust relations between sources of information used to derive the …

Additional Information About American And Arab Perceptions Of An Arabic Turn-Taking Cue, Nigel Ward, Yaffa Al Bayyari

Departmental Technical Reports (CS)

This technical report is a supplement to "American and Arab perceptions of an Arabic turn-taking cue", a paper submitted to the Journal of Cross-Cultural Psychology. It provides additional details, discussion, figures, tables, and references relating to the main finding, that English speakers tend to misinterpret the prosodic pattern used in Arabic to cue back-channel responses, perceiving it as an expression of negative affect. It also describes an experimental demonstration that being able to detect and respond to this prosodic pattern in dialog can increase native-speaker perceptions of the social effectiveness of learners.

Verified Methods For Computing Pareto Sets: General Algorithmic Analysis, Boglarka G.-Toth, Vladik Kreinovich

Departmental Technical Reports (CS)

In many engineering problems, we face multi-objective optimization, with several objective functions f1,...,fn. We want to provide the user with the Pareto set -- set of all possible solutions x which cannot be improved in all categories (i.e., for which fj(x')>=f_j(x) for all j and fj(x')>fj(x) for some j is impossible). The user should be able to select an appropriate trade-off between, say, cost and durability. We extend the general results about the (verified) algorithmic computability of maxima locations to show that Pareto sets can also computed.

Prevalence Of Mental Health Issues In The Borderlands: A Comparative Perspective, Kathleen A. O'Connor, Robert L. Anders, Hector Balcazar, Jorge Ibarra, Eduardo Perez, Luis Flores, Melchor Ortiz, Nathaniel H. Bean

Departmental Papers (S&A)

The purpose of this paper is to (a) examine the results of a binational study of two colonias near El Paso, Texas, and Ciudad Juarez, Mexico, focusing on mental health and (b) analyze those results in relation to the existing literature on Hispanic mental health to determine how border regions compare with Hispanic enclaves in nonborder regions. We focus on gender, birthplace, length of residency, and level of acculturation correlated with self-reported diagnoses of depression in our analysis. Our survey instrument incorporates portions of the Behavioral Risk Factor and Surveillance Survey; the SF36, version 2; and the CAGE scale for …

Interview No. 1436, Félix Flores Juan

Combined Interviews

Mr. Flores describes what life was like when he was growing up and working with his father as a fisherman; he recalls men coming to town to recruit people for the bracero program; later, when he married, there were no more fish, which prompted him to enlist in the bracero program; he took a boat off the island and then took a bus with a group of men to Empalme, Sonora, México; as a bracero, he worked in the fields of Texas, picking and packing various crops; he goes on to detail housing, provisions, duties, treatment, contract renewals, payment, remittances, …

Hypothesis Testing With Interval Data: Case Of Regulatory Constraints, Sa-Aat Niwitpong, Hung T. Nguyen, Ingo Neumann, Vladik Kreinovich

Departmental Technical Reports (CS)

In many practical situations, there exist regulatory thresholds: e.g., a concentration of certain chemicals in the car exhaust cannot exceed a certain level, etc. If we know the exact value of the corresponding quantity, then we can immediately tell whether, e.g., a car design resulting in this value is acceptable (below the threshold) or not acceptable (above the threshold). In practice, however, the value of the desired quantity comes from measurements or from expert estimates; in both cases, the resulting estimates are not 100% accurate. It is therefore necessary to make an accept/reject decision based on this estimate, i.e., based …

Computing Degrees Of Subsethood And Similarity For Interval-Valued Fuzzy Sets: Fast Algorithms, Hung T. Nguyen, Vladik Kreinovich

Departmental Technical Reports (CS)

We propose fast algorithms for computing degrees of subsethood and similarity for interval-valued fuzzy sets.