Understanding and protecting closed-source systems through dynamic analysis

In this dissertation, we focus on dynamic analyses that examine the data handled by programs and operating systems in order to divine the undocumented constraints and implementation details that determine their behavior in the field. First, we introduce a novel technique for uncovering the constraints actually used in OS kernels to decide whether a given instance of a kernel data structure is valid. Next, we tackle the semantic gap problem in virtual machine security: we present a pair of systems that allow, on the one hand, automatic extraction of whole-system algorithms for collecting information about a running system, and, on the other, the rapid identification of “hook points” within a system or program where security tools can interpose to be notified of security-relevant events. Finally, we present and evaluate a new dynamic measure of code similarity that examines the content of the data handled by the code, rather than the syntactic structure of the code itself. This problem has implications both for understanding the capabilities of novel malware as well as understanding large binary code bases such as operating system kernels.Ph.D

On the cross-linguistic equivalence of sentir(e) in Romance languages: a contrastive study in semantics

Recent linguistic studies on perception have focused mainly on verbs referring to the dominant visual and auditory modalities, (e.g. English see/look and hear/listen) and have largely ignored the minor verbs. The present paper seeks to fill this gap by comparing the complex semantics of the cognate verbs sentir(e) in three Romance languages, namely Spanish, French and Italian. Because the objective study of semantics is a problematic issue, we pay special attention to methodological problems and opt for a combined corpus approach involving both a translation corpus and comparable data. Evidence from both corpora indicates that, notwithstanding the fact that the rich polysemy of the three verbs partly coincides, each individual verb has undergone semantic specializations differentiating the morphological cognates

An Investigation of the Emotional Connotations of Printing Types

This thesis addresses itself to the problem of understanding the emotional connotations of printing types. It is hypothesized that there is a model useful in predicting reactions to a given type style based on atmosphere value and usage. The majority of the literature on this subject is nonempirical. It is characterized by the author\u27s stating their opinions with little or no attempt to validate them. The empirical literature shows that there is an emotional connotation associated with particular type faces. These studies have not shown, however, the importance of this connotation in terms of appropriate choice of type faces . There seems to be a need for research which measures the ability of printing type to change the contextual meaning of a message. Five hypotheses were formulated in order to study this problem. The hypotheses utilized type face predictions -- appropriate, inappropriate, and neutral. It was hypothesized that those type faces predicted to be appropriate would arouse stronger emotions compared to type faces predicted to be neutral or inappropriate; and that those predicted to be inappropriate would arouse stronger emotions compared to a type face predicted to be neutral. It was also hypothesized that the prediction for the neutral type face would not arouse stronger emotions compared to all other types tested. A six-scale semantic differential was used to test the reactions of students and employees at RIT to six type faces and six messages. The scores were taken as absolute values in order to see the strength of the emotional response to the message/type face combinations. Z scores were calculated to test the hypotheses at the 90% level of significance. The results show that some of tne hypotheses are valid at the desired level of significance in all cases tested, some are valid for certain messages only, and a few are rarely valid. The results seem to show that the emotional connotations of messages are indeed influenced by type face selection, and that a methodology for measuring this phenomonen has been developed. While the number of type faces and messages tested was small, the large number of responses obtained tend to establish the methodology as a sound one for developing a more extensive body of knowledge on this subject

Scene construction in developmental amnesia: An fMRI study.

Amnesic patients with bilateral hippocampal damage sustained in adulthood are generally unable to construct scenes in their imagination. By contrast, patients with developmental amnesia (DA), where hippocampal damage was acquired early in life, have preserved performance on this task, although the reason for this sparing is unclear. One possibility is that residual function in remnant hippocampal tissue is sufficient to support basic scene construction in DA. Such a situation was found in the one amnesic patient with adult-acquired hippocampal damage (P01) who could also construct scenes. Alternatively, DA patients' scene construction might not depend on the hippocampus, perhaps being instead reliant on non-hippocampal regions and mediated by semantic knowledge. To adjudicate between these two possibilities, we examined scene construction during functional MRI (fMRI) in Jon, a well-characterised patient with DA who has previously been shown to have preserved scene construction. We found that when Jon constructed scenes he activated many of the regions known to be associated with imagining scenes in control participants including ventromedial prefrontal cortex, posterior cingulate, retrosplenial and posterior parietal cortices. Critically, however, activity was not increased in Jon's remnant hippocampal tissue. Direct comparisons with a group of control participants and patient P01, confirmed that they activated their right hippocampus more than Jon. Our results show that a type of non-hippocampal dependent scene construction is possible and occurs in DA, perhaps mediated by semantic memory, which does not appear to involve the vivid visualisation of imagined scenes

10 years of BAWLing into affective and aesthetic processes in reading: what are the echoes?

Reading is not only “cold” information processing, but involves affective and aesthetic processes that go far beyond what current models of word recognition, sentence processing, or text comprehension can explain. To investigate such “hot” reading processes, standardized instruments that quantify both psycholinguistic and emotional variables at the sublexical, lexical, inter-, and supralexical levels (e.g., phonological iconicity, word valence, arousal-span, or passage suspense) are necessary. One such instrument, the Berlin Affective Word List (BAWL) has been used in over 50 published studies demonstrating effects of lexical emotional variables on all relevant processing levels (experiential, behavioral, neuronal). In this paper, we first present new data from several BAWL studies. Together, these studies examine various views on affective effects in reading arising from dimensional (e.g., valence) and discrete emotion features (e.g., happiness), or embodied cognition features like smelling. Second, we extend our investigation of the complex issue of affective word processing to words characterized by a mixture of affects. These words entail positive and negative valence, and/or features making them beautiful or ugly. Finally, we discuss tentative neurocognitive models of affective word processing in the light of the present results, raising new issues for future studies

The role of second person narration in representing mental states in Sylvia Plath’s Smith Journal

This paper looks at instances of second person narration in the first journal published in The Unabridged Journals of Sylvia Plath (Kukil, 2000) in order to determine the potential that second person narration can have for the linguistic representation of mental states. The contributions of different disciplines (narratology, linguistics, psychology) to the study of second person narration are considered and their findings are re-applied to a non-fictional text. In a corpus-informed comparative analysis, the paper takes into consideration both perspectives from narratology and developments in the understanding of language use in the field of psychology to provide an interdisciplinary, but cognitively inclined perspective on the phenomenon. Appearances of second person narration are chronologically tracked through the data and compared to biographical developments in Sylvia Plath's life; entries written in the first- and second person are compared to each other to determine linguistic differences using corpus methods; the results of the two analyses are then interpreted in the light of traditional functions attributed to second person narration in narratology, and in the light of research in narrative psychology. The paper aims to demonstrate that second person narration can project a sense of emotional depth and inner conflict as well as of emotional balance. However, the temporal orientation of a given text will influence which of these effects predominates