Resolving the organization of the New World monkey third visual complex: The dorsal extrastriate cortex of the marmoset (Callithrix jacchus)

We tested current hypotheses on the functional organization of the third visual complex, a particularly controversial region of the primate extrastriate cortex. In anatomical experiments, injections of retrograde tracers were placed in the dorsal cortex immediately rostral to the second visual area (V2) of New World monkeys (Callithrix jacchus), revealing the topography of interconnections between the third tier cortex and the primary visual area (V1). The data indicate the presence of a dorsomedial area (DM), which represents the entire upper and lower quadrants of the visual field, and which receives strong, topographically organized projections from the superficial layers of V1. The visuotopic organization and boundaries of DM were confirmed by electrophysiological recordings in the same animals and by architectural characteristics which were distinct from those found in ventral extrastriate cortex rostral to V2. There was no electrophysiological or histological evidence for a transitional area between V2 and DM. In particular, the central representation of the upper quadrant in DM was directly adjacent to the representation of the horizontal meridian that marks the rostral border of V2. The present results argue in favor of the hypothesis that the third visual complex in New World monkeys contains different areas in its dorsal and ventral components: area DM, near the dorsal midline, and a homolog of area 19 of other mammals, located more lateral and ventrally. The characteristics of DM suggest that it may correspond to visual area 6 (V6) of Old World monkeys. (C) 2005 Wiley-Liss, Inc.

Herbicides implicated as the cause of severe mangrove dieback in the Mackay region, NE Australia: consequences for marine plant habitats of the GBR World Heritage Area

Herbicides, particularly diuron, were correlated with severe and widespread dieback of the dominant mangrove, Avicennia marina (Forsk.) Vieth. var. eucalyptifolia (Val.) N.C. Duke (Avicenniaceae), its reduced canopy condition, and declines in seedling health within three neighbouring estuaries in the Mackay region of NE Australia. This unusual species-specific dieback, first observed in the early 1990s, had gotten notably worse by 2002 to affect > 30km(2) of mangroves in at least five adjacent estuaries in the region. Over the past century, agricultural production has responded well to the demands of increasing population with improvements in farm efficiency assisted by significant increases in the use of agricultural chemicals. However, with regular and episodic river flow events, these chemicals have sometimes found their way into estuarine and nearshore water and sediments where their effects on marine habitats have been largely unquantified. Investigations over the last three years in the Mackay region provide compelling evidence of diuron, and possibly other agricultural herbicides, as the most likely cause of the severe and widespread mangrove dieback. The likely consequences of such dieback included declines in coastal water quality with increased turbidity, nutrients and sediment deposition, as well as further dispersal of the toxic chemicals. The implications of such findings are immense since they describe not only the serious deterioration of protected and beneficial mangrove habitat but also the potential for significant direct and indirect effects on other highly-valued estuarine and marine habitats in the region, including seagrass beds and coral reefs of the Great Barrier Reef lagoon. This article reviews all key findings and observations to date and describes the essential correlative and causative evidence. (c) 2004 Elsevier Ltd. All rights reserved.

The multimodal world of medical monitoring displays

A vision of the future of intraoperative monitoring for anesthesia is presented-a multimodal world based on advanced sensing capabilities. I explore progress towards this vision, outlining the general nature of the anesthetist's monitoring task and the dangers of attentional capture. Research in attention indicates different kinds of attentional control, such as endogenous and exogenous orienting, which are critical to how awareness of patient state is maintained, but which may work differently across different modalities. Four kinds of medical monitoring displays are surveyed: (1) integrated visual displays, (2) head-mounted displays, (3) advanced auditory displays and (4) auditory alarms. Achievements and challenges in each area are outlined. In future research, we should focus more clearly on identifying anesthetists' information needs and we should develop models of attention in different modalities and across different modalities that are more capable of guiding design. (c) 2006 Elsevier Ltd. All rights reserved.

Whither the responsibility to protect? Humanitarian intervention and the 2005 World Summit

At the 2005 World Summit, the world's leaders committed themselves to the "responsibility to protect", recognizing both that all states have a responsibility to protect their citizens from genocide, war crimes, ethnic cleansing and crimes against humanity and that the UN should help states to discharge this responsibility using either peaceful means or enforcement action. This declaration ostensibly marks an important milestone in the relationship between sovereignty and human rights but its critics argue that it will make little difference in practice to the world's most threatened people. The purpose of this article is to ask how consensus was reached on the responsibility to protect, given continuing hostility to humanitarian intervention expressed by many (if not most) of the world's states and whether the consensus will contribute to avoiding future Kosovos (cases where the Security Council is deadlocked in the face of a humanitarian crises) and future Rwandas (cases where states lack the political will to intervene). It suggests that four key factors contributed to the consensus: pressure from proponents of the International Commission on Intervention and State Sovereignty, its adoption by Kofi Annan and the UN's High Level Panel, an emerging consensus in the African Union, and the American position. Whilst these four factors contributed to consensus, each altered the meaning of the responsibility to protect in important ways, creating a doctrine that many states can sign up to but that does little to prevent future Kosovos and Rwandas and may actually inhibit attempts to build a consensus around intervention in future cases.

Border Patrol in the Borderless World: Negotiating Intercultural Internet Discussion

Public Internet discussion forums appear to offer limitless opportunities for communication across linguistic, geographical and cultural borders. Closer inspection, however, reveals that cordial intercultural exchanges are far from widespread in this genre. And yet, such forums have a great deal to offer the independent language learner in terms of ease of access, potential for meaningful language practice and feedback, and exposure to different cultural conventions. This paper explores obstacles to the participation of advanced language learners in public forums of this kind through an examination of the speaking positions most readily available to the non-native speaker. A case study of sustained intercultural interaction on a public discussion thread suggests an alternative to these. Here a core of Francophone and Anglophone participants manage to negotiate an intercultural identity in order to pursue their communicative goals. The paper traces the way in which participants shift footing to regulate insider and outsider status on the forum and draws conclusions regarding the conditions for successful intercultural exchange in this genre