From calculus to wavelets: A new mathematical technique

A ‘wavelet’ is a function that exhibits oscillatory behaviour in some interval and then decays rapidly to zero outside this interval. A remarkable discovery of recent years is that the translations and dilations of certain wavelets can be used to form sets of ‘basic’ functions for expanding general functions into infinite series, and these expansions have many theoretical and practical applications.     

Dynamics of the frame in visual composition

The position of an object within a visual composition produces an effect on the observer. Does an observer see the object as strong and active if it is in the center of the picture, in one corner, “floating” off-center? Does the framing of the object or the field surrounding it give an object more meaning? Forty-four college students rated six framed, black-andwhite, single-object pictures. The 264 observations were subjected to principal axis factoring, resulting in four dimensions: activity, potency, evaluative, and verticality.     

Epidemiology of child homicide in Jefferson County, Alabama

OBJECTIVE: The purpose of this study was to present the epidemiology of homicide among children younger than 6 years of age in Jefferson County, Alabama. This study focused on obtaining great detail on homicides and suspicious deaths occurring within a fixed population. METHODS: For purposes of this study, cases included Jefferson County deaths attributed to "homicide" or that were "undetermined" as noted in the coroner files among children younger than 6 years of age who were born and died between January 1, 1988 and December, 31, 1998. Victim and offender characteristics were obtained from the Jefferson County Coroner/Medical Examiner Office records. Environmental factors and circumstances surrounding the death were noted as well. RESULTS: The 53 study subjects were mainly female (55%), Black (69%), younger than 2 years of age (85%), had single mothers (38%), and a history of abuse (53%). Offenders were more likely to be male (64%), Black (73%), and a parent of the victim (53%). Homicides primarily resulted from an angry impulse (61%), with hands the most common weapon (61%). CONCLUSIONS: The majority of deaths in this study occurred among children younger than age 2, with a high proportion of fatalities among Black children of unmarried mothers. The offender most often knew the victim, with half of all homicides and two-thirds of all infant homicides involving a parent. More than half of the homicides resulted from an angry impulse, while the most common scenario for deaths with undetermined intent involved the caretaker finding the child unresponsive.     

An analysis of predictors of college students' ethical inclinations

Correlational and path analyses are used to examine the effects of four situations on self-reported ethical behaviors on four primary ethical dimensions among 323 undergraduate communication students in two mid-Atlantic public universities. The four situations are: the students' self-reported ethical beliefs, the students' perceptions of their professors' ethical beliefs, and the students' perceptions of both the beliefs and behaviors of their peers. The ethical dimensions, which form the basis for path models, are direct-testing, indirect-testing, indirect-substitution, and direct-substitution behaviors. Results indicate that different path models fit different types of behaviors. For example, professors' beliefs, as perceived by the students, have an indirect effect on students' behaviors, particularly in the indirect dimensions. Also, in three dimensions, interactions among professors' beliefs and most college students' beliefs and behaviors influence students' behaviors. An interpretation of these behaviors is suggested, based on an adaptation of the Ajzen and Fishbein theory of reasoned action.     

Preference for signaled shock phenomenon: Direct and indirect evidence for modifiability factors in the shuttlebox

The experiments reported here investigated whether unauthorized shock modification is a factor which mediates the preference for signaled shock phenomenon (PSS) in the shuttlebox. This factor appearednot to have a critical role in PSS on the basis of earlier experiments which reported that PSS occurred in the shuttle-box even when shock was made unmodifiable by scrambling. However, the scrambling used in these experiments was not complete. In Experiments I and II reported here, no PSS occurred with completely scrambled grids; the phenomenon emerged only with unscrambled shock. Experiment III reports evidence indicating a connection between directly assessed modification and PSS with unscrambled shock, with PSS emerging only when modification had begun to occur. The pattern of results from these shuttlebox experiments parallels that found in an earlier study of PSS using a symmetrical-choice, barpress preparation.     

Solutions to certain classes of linearized reaction–diffusion equations

A systematic study is presented for the linear manifold of solutions to a generic system of reaction–diffusion equations in the neighborhood of a constant uniform (equilibrium) solution. The theory pertains directly to an arbitrary number of reacting and diffusing molecular or biological species in an arbitrary bounded spatial (1-, 2- or 3-dimensional) region with an impermeable boundary, so that the normal gradient of any species concentration function is zero at all boundary points. The stability analysis developed by previous authors is streamlined here for the case of two reacting and diffusing species, worked out completely for the case of three species, and made more amenable to specialized treatment for cases with four or more species. With the use of modern algebraic computational methods, explicit analytical general solutions to the linearized reaction–diffusion equations are derived for certain classes of model theories. These results either apply directly or admit extension to a wide range of practical reaction–diffusion problems in physical chemistry and biology.     

International Differences in Information Privacy Concerns: A Global Survey of Consumers

We examine three possible explanations for differences in Internet privacy concerns revealed by national regulation: (1) These differences reflect and are related to differences in cultural values described by other research; (2) these differences reflect differences in Internet experience; or (3) they reflect differences in the desires of political institutions without reflecting underlying differences in privacy preferences. Using a sample of Internet users from 38 countries matched against the Internet population of the United States, we find support for (1) and (2), suggesting the need for localized privacy policies. Privacy concerns decline with Internet experience. Controlling for experience, cultural values were associated with differences in privacy concerns. These cultural differences are mediated by regulatory differences, although new cultural differences emerge when differences in regulation are harmonized. Differences in regulation reflect but also shape country differences. Consumers in countries with sectoral regulation have less desire for more privacy regulation.     

Using online glossing lessons for accelerated instruction in ASL for preservice deaf education majors

Teachers of deaf and hard of hearing students must serve as language models for their students. However, preservice deaf education teachers typically have at most only four semesters of American Sign Language (ASL) training. How can their limited ASL instructional time be used to increase their proficiency? Studies involving deaf and hard of hearing students have revealed that glosses (written equivalents of ASL sentences) can serve as "bridges" between ASL and English. The study investigated whether glossing instruction can facilitate hearing students' learning of ASL. A Web site was developed in which ASL glossing rules were explained and glossing exercises provided. Posttest scores showed the experimental group improving from 39% to 71% on ASL grammar knowledge. These findings indicate that online glossing lessons may provide the means to obtain ASL skills more readily, thus preparing deaf education teachers to serve as ASL language models.