bluuebunny/crossref_metadata_2025_split huggingface dataset:
Cue- versus Probe-dependent Prefrontal Cortex Activity during Contextual Remembering
Authors: Dobbins Ian G. , Han Sanghoon 
Published: September 2006

AbstractFunctional neuroimaging comparisons of context and item memory frequently implicate the left prefrontal cortex (PFC) during the recovery of contextually specific memories. However, because cues and probes are often presented simultaneously, this activity could reflect operations involved in planning retrieval or instead reflect later operations dependent upon the memory probes themselves, such as evaluation of probe-evoked recollections. More importantly, planning-related activity, wherein subjects reinstate details outlining the nature of desired remembrances, should occur in response to contextual memory cues even before retrieval probes are available. Using event-related functional magnetic resonance imaging, we tested this by dissociating cue- from probe-related activity during context memory for pictures. Cues forewarning contextual memory demands yielded more activity than those forewarning item memory in the left lateral precentral gyrus, midline superior frontal gyrus, and right frontopolar cortex. Thus, these anticipatory, cue-based activations indicated whether upcoming probe decisions would require contextually specific memories or not. In contrast, the left dorsolateral/midventrolateral and anterior ventrolateral PFC areas did not show differential activity until the probes were actually presented, demonstrating greater activity for context than for item memory probes. Direct comparison of proximal left PFC regions demonstrated qualitatively different response profiles across cue versus probe periods for lateral precentral versus dorsolateral regions. These results potentially isolate contextual memory-planning-related processes from subsequent processes such as the evaluation of recollections, which are necessarily dependent on individual probe features. They also demonstrate that contextual remembering recruits multiple, functionally distinct PFC processes.
Inducing Letter-by-letter Dyslexia in Normal Readers
Authors: Fiset Daniel , Gosselin Frédéric , Blais Caroline , Arguin Martin 
Published: September 2006

Abstract
Letter-by-letter (LBL) dyslexia is an acquired reading disorder characterized by very slow reading and a large linear word length effect. This suggests the use of a sequential LBL strategy, in sharp contrast with the parallel letter processing used by normal subjects. Recently, we have proposed that the reading difficulty of LBL dyslexics is due to a deficit in discriminating visually similar letters based on parallel letter processing [Arguin, M., Fiset, S., & Bub, D. Sequential and parallel letter processing in letter-by-letter dyslexia. Cognitive Neuropsychology, 19, 535–555, 2002]. The visual mechanisms underlying this deficit and the LBL strategy, however, are still unknown. In this article, we propose that LBL dyslexic patients have lost the ability to use, for parallel letter processing, the optimal spatial frequency band for letter and word recognition. We claim that, instead, they rely on lower spatial frequencies for parallel processing, that these lower spatial frequencies produce confusions between visually similar letters, and that the LBL compensatory strategy allows them to extract higher spatial frequencies. The LBL strategy would thus increase the spatial resolution of the visual system, effectively resolving the issue pertaining to between-letter similarity. In Experiments 1 and 2, we succeeded in replicating the main features characterizing LBL dyslexia by having normal individuals read low-contrast, high-pass-filtered words. Experiment 3, conducted in LBL dyslexic L.H., shows that, indeed, the letter confusability effect is based on low spatial frequencies, whereas this effect was not supported by high spatial frequencies.
Lapses in a Prefrontal-Extrastriate Preparatory Attention Network Predict Mistakes
Authors: Padilla Mayra L. , Wood Richard A. , Hale Laura A. , Knight Robert T. 
Published: September 2006

Abstract
Mistakes are common to all forms of behavior but there is disagreement about what causes errors. We recorded electrophysiological and behavioral measures in a letter discrimination task to examine whether deficits in preparatory attention predicted subsequent response errors. Error trials were characterized by decreased frontal-central preparatory attention event-related potentials (ERPs) prior to stimulus presentation and decreased extrastriate sensory ERPs during visual processing. These findings indicate that transient lapses in a prefrontal-extrastriate preparatory attention network can lead to response errors.
Specificity of Action Representations in the Lateral Occipitotemporal Cortex
Authors: Kable Joseph W. , Chatterjee Anjan 
Published: September 2006

AbstractThe ability to recognize actions is important for cognitive development and social cognition. Areas in the lateral occipitotemporal cortex show increased activity when subjects view action sequences; however, whether this activity distinguishes between specific actions as necessary for action recognition is unclear. We used a functional magnetic resonance imaging adaptation paradigm to test for brain regions that exhibit action-specific activity. Subjects watched a series of action sequences in which the action performed or the person performing the action could be repeated from a previous scan. Three regions—the superior temporal sulcus (pSTS), human motion-sensitive cortex (MT/MST), and extrastriate body area (EBA)—showed decreased activity for previously seen actions, even when the actions were novel exemplars because the persons involved had not been seen previously. These action-specific adaptation effects provide compelling evidence that representations in the pSTS, MT/MST, and EBA abstract actions from the agents involved and distinguish between different particular actions.
Processing of Musical Syntax Tonic versus Subdominant: An Event-related Potential Study
Authors: Poulin-Charronnat Bénédicte , Bigand Emmanuel , Koelsch Stefan 
Published: September 2006

Abstract
The present study investigates the effect of a change in syntactic-like musical function on event-related brain potentials (ERPs). Eight-chord piano sequences were presented to musically expert and novice listeners. Instructed to watch a movie and to ignore the musical sequences, the participants had to react when a chord was played with a different instrument than the piano. Participants were not informed that the relevant manipulation was the musical function of the last chord (target) of the sequences. The target chord acted either as a syntactically stable tonic chord (i.e., a C major chord in the key of C major) or as a less syntactically stable subdominant chord (i.e., a C major chord in the key of G major). The critical aspect of the results related to the impact such a manipulation had on the ERPs. An N5-like frontal negative component was found to be larger for subdominant than for tonic chords and attained significance only in musically expert listeners. These findings suggest that the subdominant chord is more difficult to integrate with the previous context than the tonic chord (as indexing by the observed N5) and that the processing of a small change in musical function occurs in an automatic way in musically expert listeners. The present results are discussed in relation to previous studies investigating harmonic violations with ERPs.
The Role of the Striatum in Processing Language Rules: Evidence from Word Perception in Huntington's Disease
Authors: Teichmann Marc , Dupoux Emmanuel , Kouider Sid , Bachoud-Lévi Anne-Catherine 
Published: September 2006

Abstract
On the assumption that linguistic faculties reflect both lexical storage in the temporal cortex and combinatorial rules in the striatal circuits, several authors have shown that striatal-damaged patients are impaired with conjugation rules while retaining lexical knowledge of irregular verbs [Teichmann, M., Dupoux, E., Kouider, S., Brugières, P., Boissé, M. F., Baudic, S., Cesaro, P., Peschanski, M., & Bachoud-Lévi, A. C. (2005). The role of the striatum in rule application. The model of Huntington's disease at early stage. Brain, 128, 1155–1167; Ullman, M. T., Corkin, S., Coppola, M., Hickok, G., Growdon, J. H., Koroshetz, W. J., & Pinker, S. (1997). A neural dissociation within language: Evidence that the mental dictionary is part of declarative memory, and that grammatical rules are processed by the procedural system. Journal of Cognitive Neuroscience, 9, 266–276]. Yet, such impairment was documented only with explicit conjugation tasks in the production domain. Little is known about whether it generalizes to other language modalities such as perception and whether it refers to implicit language processing or rather to intentional rule operations through executive functions. We investigated these issues by assessing perceptive processing of conjugated verb forms in a model of striatal dysfunction, namely, in Huntington's Disease (HD) at early stages. Rule application and lexical processes were evaluated in an explicit task (acceptability judgments on verb and nonword forms) and in an implicit task (lexical decision on frequency-manipulated verb forms). HD patients were also assessed in executive functions, and striatal atrophy was evaluated with magnetic resonance imaging (bicaudate ratio). Results from both tasks showed that HD patients were selectively impaired for rule application but lexical abilities were spared. Bicaudate ratios correlated with rule scores on both tasks, whereas executive parameters only correlated with scores on the explicit task. We argue that the striatum has a core function in linguistic rule application generalizing to perceptive aspects of morphological operations and pertaining to implicit language processes. In addition, we suggest that the striatum may enclose computational circuits that underpin explicit manipulation of regularities.
Neuroanatomical Evidence for Distinct Cognitive and Affective Components of Self
Authors: Moran J. M. , Macrae C. N. , Heatherton T. F. , Wyland C. L. , Kelley W. M. 
Published: September 2006

Abstract
This study examines whether the cognitive and affective components of self-reflection can be dissociated using functional magnetic resonance imaging. Using a simple paradigm in which subjects judged the personal relevance of personality characteristics that were either favorable (e.g., “honest”) or unfavorable (e.g., “lazy”, we found that distinct neural circuits in adjacent regions of the prefrontal cortex subserve cognitive and emotional aspects of self-reflection. The medial prefrontal cortex responded only to material that was self-descriptive, and this did not differ as a function of the valence of the trait. When material was judged to be self-relevant, the valence of the material was resolved in an adjacent region of ventral anterior cingulate. The nature of self is one of the most enduring questions in science, and researchers are now beginning to be able to decompose the neural operations that give rise to a unitary sense of self.
Computer Law of Tunisia: Promoting Secure E-Commerce Transactions with Electronic Signatures
Authors: Blythe Stephen 
Published: September 2006

AbstractTunisia's Electronic Exchanges and Electronic Commerce Law ("ECL") was enacted for the purpose of achieving more security in E-commerce transactions. The ECL provides that: (1) electronic documents may be used to satisfy a statutory requirement for paper documents to be stored for a given period of time; and (2) an electronic signature affixed to an electronic document may be used to satisfy a statutory requirement for an ink signature to be executed on a paper document. The National Agency for Electronic Certification ("NAEC") licenses Certification Authorities ("CA") and regulates their business operations. The purpose of a CA is to verify the authenticity and integrity of an electronic signature that was created by its client—the "subscriber"—and the electronic document it is attached to. The CA issues a certificate to a subscriber containing evidence that her electronic signature was created with a private key that was issued to her by the CA. Tunisia recognizes certificates issued by a foreign CA that has met licensing requirements which are comparable to that of Tunisia. The CA carries potential liability for: the veracity of the information stated in the certificate; ensuring the cryptographic relationship between the private key and the public key (which is used by relying third parties to ascertain the electronic signature's authenticity); and for maintenance of security of the subscriber's private information. The subscriber has potential liability based on her duty to maintain security over the private key and to promptly inform the CA if the private key's security has been compromised. The ECL contains rules governing E-commerce contracts. Furthermore, it has some of the best consumer protections to be found anywhere. For example, Tunisian consumers have a 10-day window of opportunity to back out of the deal after an E-contract has been consummated. This is progressive and commendable; many consumers in Western Europe and North America do not enjoy such a protection. The ECL also contains a list of computer crimes and punishments:fines (up to 10,000 dinars) may be assessed for these infractions, and imprisonment may be imposed against a cyber-seller who uses coercion or trickery against a consumer.
Lost and Found Theories of Law in Early China
Authors: Richey Jeffrey 
Published: September 2006

AbstractThe so-called "Chinese view of law" is but one among many ways of understanding law in early China. Early Chinese thinkers held varied views of law's origins in nature or culture, its relationship to the sacred, and its connection with sagehood. Confucians tended to present law as an artificial and ineffective instrument for the promotion of moral order. In contrast, Mohist and Huang-Lao thinkers consistently viewed law as a natural and effective tool for the moral rectification of society when wielded by the sagely ruler, but differed in their conceptions of the sacred and the nature of the cosmic order. On parle souvent de « La perspective chinoise sur la loi » comme si elle était unique. Cependant, les penseurs chinois anciens avaient plusieurs perspectives différentes sur les origines naturelles ou culturelles des lois et sur leurs rapports avec le sacré et avec la sagesse. Les Confuciens présentaient surtout la loi comme un moyen artificiel et inefficace de promouvoir l'ordre moral. Au contraire—quoique les Mohistes et les Huanglaos aient eu des notions très différentes du sacré et de l'ordre cosmique—les deux voyaient surtout la loi comme un outil naturel et efficace qu'un roi éclairé pouvait utiliser pour rectifier les mœurs.
Ugarit and the Southern Levantine Sea-Ports
Authors: Vidal Jordi 
Published: September 2006

AbstractThe texts studied in this paper show that the extent of the commercial and political relationships between Ugarit and the Phoenician cities, particularly Tyre, was far superior to that of the ties with the Southern Levantine sea-ports. However, the importance of the commercial ties between Ugarit and Ashdod may be de fined using the written sources. In fact, if our interpretation of RS 19.96 is correct, the intensity of the contacts between both cities even led to the establishment of an Ashdodite merchant station in Ugarit, from which their commercial affairs were structured. Les textes étudiés dans le présent article montrent la façon dont Ugarit avait maintenu des rélations commerciales et politiques avec les royaumes phéniciens, spécialement avec Tyr. Ces rélations furent plus intenses que celles maintenues avec les ports du sud du Levant. De toute façon, ces textes constatent les liens commerciaux trés etroit qui auraient existé entre Ugarit et Ashdod. De fait, si nôtre interprétation de RS 19.96 est correcte, l'intensité des contacts entre les deux villes aboutit à l'établissement d'une station commerciale d'Ashdod à Ugarit, station qui fut chargée d'organiser ces relations commerciales.
Retrieval of Hydrometeor Profiles in Tropical Cyclones and Convection from Combined Radar and Radiometer Observations
Authors: Jiang Haiyan , Zipser Edward J. 
Published: September 2006

Abstract
A retrieval algorithm is described to estimate vertical profiles of precipitation ice water content and liquid water content in tropical cyclones and convection over ocean from combined spaceborne radar and radiometer measurements. In the algorithm, the intercept parameter N0s in the exponential particle size distribution for rain, snow, and graupel are adjusted iteratively to minimize the difference between observed brightness temperatures and simulated ones by using a simulated annealing optimization method. Sensitivity tests are performed to understand the effects of the input parameters. The retrieval technique is investigated using the Earth Resources (ER)-2 aircraft Doppler radar and Advanced Microwave Precipitation Radiometer data in tropical cyclones and convection. An indirect validation is performed by comparing the measured and retrieved 50-GHz (independent channel) brightness temperature. The global agreement shows not only the quality of the inversion procedure, but also the consistency of the retrieved parameters with observations. The direct validation of the ice water content retrieval by using the aircraft in situ microphysical measurements indicates that the algorithm can provide reliable ice water content estimates, especially in stratiform regions. In convective regions, the large variability of the microphysical characteristics causes a large uncertainty in the retrieval, although the mean difference between the retrieved ice water content and aircraft-derived ice water content is very small. The ice water content estimated by a radar-only empirical relationship is higher than those retrieved by the combined algorithm and derived by the aircraft in situ observations. The new combined algorithm contains information that should improve ice water content estimates from either radar-only or passive microwave–only measurements. An important caveat for this study is that it concerns precipitation estimates. In this paper, ice and liquid water content should be interpreted as precipitation ice and liquid water content.
The Effect of Local Atmospheric Circulations on Daytime Carbon Dioxide Flux Measurements over a Pinus elliottii Canopy
Authors: Loescher H. W. , Starr G. , Martin T. A. , Binford M. , Gholz H. L. 
Published: September 2006

Abstract
The daytime net ecosystem exchange of CO2 (NEE) was measured in an even-aged slash pine plantation in northern Florida from 1999 to 2001 using the eddy covariance technique. In August 2000, two clear-cuts were formed approximately 1 km west of the study site. A statistical approach was used to determine whether the clear-cuts induced changes in CO2 concentration, wind direction, horizontal and vertical wind speeds, and temperature, as measured by instruments above the plantation canopy and, in turn, whether any such changes affected daytime NEE. The NEE estimates were first transformed so that mean responses to incident radiation and vapor pressure deficit were removed using empirically derived functions for each 30-min period. Prior to the clear-cuts, there were significant interactive effects of CO2 concentration and some wind statistics on NEE at the tower when wind was flowing from the direction of the future clear-cuts. Even in this relatively homogenous forest, with flat topography, the CO2 source strength differed with wind direction prior to the clear-cuts. After the clear-cuts, additional two- and three-way interactive effects became significant during flows from the direction of the clear-cuts. There was also a 16.6% reduction in the integrated measure of daytime NEE over 487 days after the clear-cuts. The results herein suggest that the development of local circulations over the clear-cuts contributed to low-frequency effects on the NEE.
Automatic Detection of Local Cloud Systems from MODIS Data
Authors: Cappelluti G. , Morea A. , Notarnicola C. , Posa F. 
Published: September 2006

Abstract
This paper describes an algorithm that is aimed at the identification of cloudy and clear pixels in Moderate-Resolution Imaging Spectroradiometer (MODIS) images to support earth science and nowcasting applications. The process from geolocated and calibrated data allows one to obtain cloud masks with four clear-sky confidence levels for five different cloud system types. The technique has been developed using the MODIS cloud-mask algorithm heritage, but the threshold tests performed have been executed without comparing solar reflectances and thermal brightness temperatures with thresholds determined in advance, but instead with thresholds carried out from classification methods. The main advantage of this technique is that the thresholds are obtained directly from the images. Seventy-five percent of the spectral signatures (known as end members) derived from the winter images in the detection of the various cloud types and 80% of the summer end members can be considered as being well discriminated. Furthermore, it seems that the end members characterizing the different cloud systems are constant throughout the various seasons of the year (they vary with a confidence level of 60%), whereas those describing clear sky change in a notable manner (the associated confidence level is 99%). The algorithm is able to produce cloud masks pertinent to limited regions at a mesoscale level, which may be a key factor for nowcasting purposes. This work shows that the use of end members and spectral angles, as opposed to spectral thresholds, should be carefully examined because of the fact that it might be simpler or that higher performances may be achieved at a regional scale.
The Synoptic Decomposition of Cool-Season Rainfall in the Southeastern Australian Cropping Region
Authors: Pook Michael J. , McIntosh Peter C. , Meyers Gary A. 
Published: September 2006

Abstract
Daily rainfall during the April–October growing season in a major cropping region of southeastern Australia has been related to particular types of synoptic weather systems over a period of 33 yr. The analysis reveals that cutoff lows were responsible for at least 50% of all growing-season rainfall and accounted for 80% of daily rainfall events exceeding 25 mm per station. The proportion of rainfall contributed by cutoff lows varies throughout the growing season. It is highest in austral autumn and spring (55% and 57%, respectively) and falls to a minimum in July (42%). By way of contrast, the total contribution of all types of frontal systems to growing-season rainfall is about 32%, although the monthly value reaches a maximum of 41% in July when mean cutoff rainfall reaches a minimum. Rainfall associated with fronts is strongly concentrated in the lower range of daily falls (less than 10 mm per station). Frontal rainfall is found to be more consistent from year to year than is cutoff rainfall. The number of cutoff lows per season is highly variable, and there is a significant correlation between the number of cutoff days and atmospheric blocking in the region south of Australia in each month of the growing season. The mean amount of rainfall per cutoff day is also variable and has declined by approximately 0.8 mm over the analysis period. An understanding of the mechanisms controlling year-to-year variability of cutoff rainfall is therefore an important step in improving seasonal forecasts for agriculture in southeastern Australia.