Mitochondrial Dna Replacement Versus Nuclear Dna Persistence

In this paper we consider two populations whose generations are not overlapping and whose size is large. The number of males and females in both populations is constant. Any generation is replaced by a new one and any individual has two parents for what concerns nuclear DNA and a single one (the mother) for what concerns mtDNA. Moreover, at any generation some individuals migrate from the first population to the second. In a finite random time $T$, the mtDNA of the second population is completely replaced by the mtDNA of the first. In the same time, the nuclear DNA is not completely replaced and a fraction $F$ of the ancient nuclear DNA persists. We compute both $T$ and $F$. Since this study shows that complete replacement of mtDNA in a population is compatible with the persistence of a large fraction of nuclear DNA, it may have some relevance for the Out of Africa/Multiregional debate in Paleoanthropology

Lack of self-average in weakly disordered one dimensional systems

We introduce a one dimensional disordered Ising model which at zero temperature is characterized by a non-trivial, non-self-averaging, overlap probability distribution when the impurity concentration vanishes in the thermodynamic limit. The form of the distribution can be calculated analytically for any realization of disorder. For non-zero impurity concentration the distribution becomes a self-averaging delta function centered on a value which can be estimated by the product of appropriate transfer matrices.Comment: 17 pages + 5 figures, TeX dialect: Plain TeX + IOP macros (included

So, Where are You from Originally? Using Ineffective and Inappropriate Questions in MIS Tenure-Track Job Interviews

This paper presents the results of a study examining the procedures used by information systems departments when recruiting for tenure track faculty. An overview of the relevant legal environment is presented, along with a review of the current recruiting procedures used by the IS discipline. The results of the study indicate that professors use ineffective and inappropriate interviewing techniques during job interviews, including inappropriate inquiries into a candidate\u27s children, family, age, and country of origin

Optimal Strategies for Prudent Investors

We consider a stochastic model of investment on an asset of a stock market for a prudent investor. She decides to buy permanent goods with a fraction \a of the maximum amount of money owned in her life in order that her economic level never decreases. The optimal strategy is obtained by maximizing the exponential growth rate for a fixed \a. We derive analytical expressions for the typical exponential growth rate of the capital and its fluctuations by solving an one-dimensional random walk with drift.Comment: 14 pages, LaTeX, epsfig.sty, 7 eps figures, minor changes; accepted for International J. of Theoretical and Applied Financ

PAM: Cooking up a Model that Encourages Faculty to Stick to Active Learning Pedagogies

This study proposes PAM—a model that tests the specific factors that predict faculty\u27s intention to adopt active learning pedagogies. The study adapts the technology acceptance model (TAM) to better understand the factors that might affect a faculty member’s intention to adoption new technology. The results largely support the model. For external factors, the percentage of time lecturing was significantly related to perceived ease of adoption and social influence. Instructor perceptions of the usefulness of the pedagogy significantly predicted instructor’s pedagogical attitude. Finally, pedagogical attitude significantly predicted the instructor’s intention to adopt a pedagogy. These results suggest that a TAM-based model is useful for understanding faculty adoption behaviors

A general methodology to price and hedge derivatives in incomplete markets

We introduce and discuss a general criterion for the derivative pricing in the general situation of incomplete markets, we refer to it as the No Almost Sure Arbitrage Principle. This approach is based on the theory of optimal strategy in repeated multiplicative games originally introduced by Kelly. As particular cases we obtain the Cox-Ross-Rubinstein and Black-Scholes in the complete markets case and the Schweizer and Bouchaud-Sornette as a quadratic approximation of our prescription. Technical and numerical aspects for the practical option pricing, as large deviation theory approximation and Monte Carlo computation are discussed in detail.Comment: 24 pages, LaTeX, epsfig.sty, 5 eps figures, changes in the presentation of the method, submitted to International J. of Theoretical and Applied Financ

The Effects of Trustworthiness Perceptions on the Formation of Initial Trust: Implications for MIS Student Teams

Teamwork is a growing part of management education. One aspect of ensuring a successful team experience as part of the educational process involves the formation of trust between teammates. We present the results of an experiment that examines how students form initial trust under two general conditions - when selecting teammates to complete class assignments (task context) and when selecting teammates to forge new relationships (relationship context). The findings indicate that the factors that result in trust are weighted differently, depending on the purpose of the teams. Teams that are focused on completion of a task weighed prospective team members\u27 ability the most, while teams that were focused on forming friendships focused on the prospective team members\u27 integrity. We present specific recommendations and an exercise that MIS instructors can use to encourage trust formation in their teams

BEYOND THE FIVE-MINUTE UNIVERSITY: IMPROVING LEARNING IN OUR MIS CLASSES

In a classic Saturday Night Live skit in the seventies, Don Novello, in character as Father Guido Sarducci, skewered higher education by proposing to open the Five Minute University. The institution would teach basic statements which students would parrot back, in effect achieving what they would have retained five years after graduation. The skit was a huge success for Novello, because it characterized the state of learning in higher education at that time. Over thirty years later, we seek to understand what is necessary for MIS students to truly learn and find that the discipline’s conceptualization of learning remains largely consistent with the practices mocked in the skit. Although academia’s main mission is to educate students, many faculty continue to rely on pedagogies that focus on memorization, and on assessments that focus on students parroting back answers. This essay explores the components of learning as outlined in Ambrose et al. 2010, applies them to MIS, and makes recommendations to the discipline for improving student learning

Data Fusion Techniques for Processing Aerospace Remote Sensing Electro-Optical Data

This paper deals with data fusion between different resolution multispectral (MS) and panchromatic (Pan) images in order to obtain high spatial resolution MS images. A survey is provided about the state-of-the-art data fusion techniques and synthesized product's quality assessment criteria. Several fusion algorithms and quality indexes were implemented in a Toolbox with a graphical user interface developed in MATLAB environment, namely Fusion Tool Box (FTB), developed to obtain experimental results. The analysis performed through FTB on two different data sets was oriented to validate the theoretical analysis and to perform a quantitative comparison among fusion algorithms for several applications. Results allow a first level evaluation of advantages and drawbacks of the various techniques for specific applications