It is widely recognized that mineral fertilizers must play an important part in improving agricultural productivity in western Kenyan farming systems. This paper suggests that for this goal to be realized, farmers’ knowledge must be strengthened to improve their understanding of fertilizers and their use. We analyzed smallholder knowledge of fertilizers and nutrient management, and draw practical lessons from empirical collective fertilizer-response experiments. Data were gathered from the collective fertilizer-response trials, through focus group discussions, by participant observation, and via in-depth (...) interviews representing 40 households. The collective trials showed that the application of nitrogen (N) or phosphorous (P) alone was insufficient to enhance yields in the study area. The response to P on the trial plots was mainly influenced by incidences of the parasitic Striga weed, by spatial variability or gradients in soil fertility of the experimental plots, and by interactions with N levels. These results inspired farmer to design and conduct experiments to compare crop performance with and without fertilizer, and between types of fertilizers, or responses on different soils. Participating farmers were able to differentiate types of fertilizer, and understood rates of application and the roles of respective fertilizers in nutrient supply. However, notions were broadly generated by unsteady yield responses when fertilizers were used across different fertility gradients, association with high cost (especially if recommended rates were to be applied), association of fertilizer use with hybrids and certain crops, historical factors, among other main aspects. We identified that strengthening fertilizer knowledge must be tailored within existing, albeit imperfect, systems of crop and animal husbandry. Farmers’ perceptions cannot be changed by promoting more fertilizer use alone, but may require a more basic approach that, for example, encourages farmer experimentation and practices to enhance soil properties such as carbon build-up in impoverished local soils. (shrink)

This study reports on action research efforts that were aimed at developing institutional arrangements beneficial for soil fertility improvement. Three stages of action research are described and analyzed. We initially began by bringing stakeholders together in a platform to engage in a collaborative design of new arrangements. However, this effort was stymied mainly because conditions conducive for learning and negotiation were lacking. We then proceeded to support experimentation with alternative arrangements initiated by individual landowners and migrant farmers. The implementation of (...) these arrangements too ran into difficulties due to intra-family dynamics and ambiguities regarding land tenure. Further investigations to find out how ambiguities could be tackled revealed that the local actors themselves had taken initiatives towards developing institutional innovations to reduce ambiguities. However, there is still considerable scope for further development of these self-organized innovations. The article ends with a reflection on inter-disciplinary action research, where it is argued that making “mistakes” is an inherent and necessary characteristic in action research that aims to address complex social issues. (shrink)

The following values have no corresponding Zotero field: PB - Lawrence Erlbaum Associates Ltd Hove,, UK.

Human clinical research has become a huge economic enterprise (Morin et al. 2002; Noah 2002). Because the human subject at the center can be so easily marginalized, many commentators recommend spec...

:The problems of poor or biased information and of misleading health and well-being advice on the Internet have been extensively documented. The recent decision by the Internet Corporation for Assigned Names and Numbers to authorize a large number of new generic, top-level domains, including some with a clear connection to health or healthcare, presents an opportunity to bring some order to this chaotic situation. In the case of the most general of these domains, “.health,” experts advance a compelling argument in (...) favor of some degree of content oversight and control. On the opposing side, advocates for an unrestricted and open Internet counter that this taken-for-granted principle is too valuable to be compromised, and that, once lost, it may never be recovered. We advance and provide evidence for a proposal to bridge the credibility gap in online health information by providing provenance information for websites in the.health domain. (shrink)

We attempt to quantify and qualify the preferences of consumers for beef with a number of environmental and food quality attributes. Our goal is to evaluate the viability of a proposed food co-operative based in the Wood River watershed of southern Saskatchewan, Canada. The food co-operative was designed to provide a price premium to producers who adopted alternative management practices. In addition, the study evaluated the acceptance of a proposed food co-operative by consumer that had environmental interests as compared to (...) the general population. Conjoint analysis was used to determine the trade-off and relative value of beef with the following production and purchasing characteristics: (a) use of hormones, antibiotics and vaccination in production; (b) method of obtaining the beef including monthly or yearly purchase contracts or a local market; (c) price relative to beef purchased from the local grocery store; and (d) impact on the river ecosystem. Consumers from environmental groups had stronger environmental and food quality preferences than individuals from the general population. However, consumers from both groups expressed a willingness to pay higher prices for food that had these attributes. It was uncertain whether the magnitude of the premium, in combination with a desire not to enter a long-term purchasing commitment, would be large enough to encourage farmers to adopt the alternative management. (shrink)

Wright, Ken Review(s) of: Blind spots: Why We Fail to Do What's Right And What to Do about It, by Max H. Bazerman and Ann E. Tenbrunsel Princeton University Press 2011, x, 191pp.

On the one hand, philosophers have presented numerous apparent examples of indeterminate individuation, i.e., examples in which two things are neither determinately identical nor determinately distinct. On the other hand, some have argued against even the coherence of the very idea of indeterminate individuation. This paper defends the possibility of indeterminate individuation against Evans’s argument and some other arguments. The Determinacy of Identity—the thesis that identical things are determinately identical—is distinguished from the Determinacy of Distinctness—the thesis that distinct things are (...) determinately distinct. It is argued that while the first thesis holds universally and there is no case of indeterminate identity, there are reasons to think that the second thesis does not hold universally, and that there are cases of indeterminate distinctness. (shrink)

Elizabeth Barnes and J. Robert G. Williams claim to offer a new ontic theory of vagueness, the kind of theory which considers vagueness to exist not in language but in reality. This paper refutes their claim. The possible worlds they employ are ersatz possible worlds, i.e., sets of sentences. Unlike reality, they don’t contain concrete and often material objects. As a result, there is nothing in Barnes and Williams’s description of the theory that the semanticist cannot or does not accept. (...) Thus, they have failed to establish their theory as a genuine intelligible ontic alternative to semantic theories. (shrink)

This paper sets forth a new theory of quantifiers and term connectives, called shadow theory , which should help simplify various semantic theories of natural language by greatly reducing the need of Montagovian proper names, type-shifting, and λ-conversion. According to shadow theory, conjunctive, disjunctive, and negative noun phrases such as John and Mary , John or Mary , and not both John and Mary , as well as determiner phrases such as every man , some woman , and the boys (...) , are all of semantic type e and denote individual-like objects, called shadows — conjunctive , disjunctive , or negative shadows, such as John-and-Mary, John-or-Mary, and not-(John-and-Mary). There is no essential difference between quantification and denotation: quantification is nothing but denotation of shadows. Individuals and shadows constitute a Boolean structure. Formal language LSD (Language for Shadows with Distributivity), which takes compound terms to denote shadows, is investigated. Expansions and enrichments of LSD are also considered toward the end of the paper. (shrink)

This 4000 word essay was selected for a special issue of 'Image & Narrative' (Issue 18, September 2007), on 'Thinking Pictures', guest edited by Hanneke Grootenboer, author of 'The Rhetoric of Perspective' (University of Chicago Press, 2005). 'Image & Narrative' is a peer-reviewed e-journal on visual narratology, with essays reviewed by at least two members of the editorial board. The essay addresses contemporary arguments on spectatorship within the philosophy of art. It examines different ways by which internal and external spectators (...) negotiate painting's two perspectives: the absent scene represented by the picture's marked surface and the external point of view of a beholder, standing in real space. The essay argues that if the imaginative engagement provided by an internal spectator (see Wollheim) renders the picture plane transparent, so that we might enter the virtual space of the painting, then in paintings integrated into their architectural contexts the surface plays a semantic role in both connecting and separating different realms. If the picture surface disappears for the internal spectator, then for works integrated into their architectural settings its status is heightened and negated as a threshold separating spatiotemporal realms. The essay challenges semiotic accounts of painting. While linguistic derived semiotic accounts negate a spatial engagement, in Hubert Damisch's proposal that painting is a form of thinking, structure emerges from within the loop of the perspective paradigm. The essay argues, however, that if certain paintings 'think', they do so only in the sense that thought permeates a phenomenological whole where perception and imagination merge. The essay is a development of 'A spatiality of situation', published by Art In-sight, Filmwaves magazine (no. 31, 2006), guest edited with Adam Kossoff. A related paper, 'Levels of Reality', was given at the 'Real Things: matter, materiality, representation' conference at the University of York, 5-8 July 2007. (shrink)

"Oh really. The Cartesian dualism is the major sin of modernity, didn't you know that?" She began laughing, as if this were some sort of inside joke. "And you don't want to be living in sin, do you? What are you, Wilber, all of 20 years old? And already living in sin.".

RESUMO: Em grande medida, os estudos sobre a constituição do arcabouço teórico do lacanismo têm ocorrido ao largo do exame de sua historicidade. Essa negligência reforça o ocultamento do processo social que levou a produção lacaniana a uma profunda integração entre a formalização e a etificação da teoria. Esse processo não pode ser compreendido sem a contextualização crítica da conjuntura política que cercou a proposta e a existência da École Freudienne de Paris, fundada por Lacan, em 1964. A estreita convivência (...) com os jovens militantes dos grupos da esquerda extraparlamentar da época, notadamente os maoístas, e a assimilação de suas problematizações fizeram do pensamento lacaniano e da EFP o espaço de objetivação de um discurso movido pela paráfrase política e seus efeitos de engajamento. Este artigo pretende expor as linhas de estruturação político-social dos conceitos forjados por Lacan, em meio à instituição e à consolidação de sua Escola. ABSTRACT: To a great extent the studies of the constitution of the Lacanism theoretical framework have occurred off the examination of its historicity. This neglect strengthens the concealment of the social process that led the Lacanian production to a deep integration between the theory formalization and the theory ethification. This process can not be understood without grasping the context of the political environment that surrounded the proposal and the existence of École Freudienne de Paris, founded by Lacan in 1964. The close contact with the young militants of the extra-parliamentary left groups of the time, notably the Maoists, and the assimilation of the problems they rose made the Lacanian thought and EFP the place of objectification of a speech moved by the political paraphrase and their engagement effects. This article aims to expose the lines of political and social structure of concepts forged by Lacan through the establishment and consolidation of his School. (shrink)

This paper offers a theory of quotation by uniting two apparently disparate extant theories, Recanati's pragmatic theory and Washington's identity theory. Recanati draws a distinction between open and closed quotations, and contends that open quotations do not refer. Washington argues that closed quotations refer to various expression types, not just orthographic and/or phonetic types. By combining these views, this paper proposes a theory, according to which quotations, open or closed, may be tokens of semantico-physical types (i.e., meaningful expressions), and while (...) those types are mentioned (or referred to) by closed quotations, they are used in open quotations. (shrink)

The contribution to L2-acquisition which comes from UG is conceptually distinct from that which comes from L1 (or from L1 and L2 jointly), but it is difficult to tease the two apart. The workings of deep, core principles (e.g., locality and subjacency) are so massively evident in L1 and L2 as to be of questionable use in the search for the contribution which is purely of UG.

Ken Safir, Rutgers University Following a line of thought initiated by Kuno (1972), it has been suggested that the coconstrual of first person pronouns is a model for the coconstrual of a logophoric pronoun with its antecedent. This particular proposal has been extended to the forms of logophoricity that have been observed in some African languages (e.g., Ewe, as remarked in passing by Clements, 1975, and Amharic, as proposed by Schlenker, 2000).

In his paper, "Explanations of Irrelevance" (1983), Paul Horwich proposes an amended version of hypothetico-deductivism, (H-D * ). In this discussion note it is shown that (H-D * ) has the consequence that "A is a non-black raven" confirms "All ravens are black" relative to any tautology! It is noted that Horwich's (H-D * ) bears a strong resemblance to Hempel's prediction criterion of confirmation and that the prediction criterion faces the same obstacle. A related problem for hypothetico-deductivism in its (...) simplest form--that is, E confirms H iff E is an (observational) consequence of H--is displayed. The discussion concludes with a suggestion about how (H-D * ) and simple hypothetico-deductivism might be amended in order to avoid these results. (shrink)

There is an intimate connection between proofs of the natural deduction systems and typed lambda calculus. It is well-known that in simply typed lambda calculus, the notion of formulae-as-types makes it possible to find fine structure of the implicational fragment of intuitionistic logic, i.e., relevant logic, BCK-logic and linear logic. In this paper, we investigate three classical substructural logics (GL, GLc, GLw) of Gentzen's sequent calculus consisting of implication and negation, which contain some of the right structural rules. In terms (...) of Parigot's -calculus with proper restrictions, we introduce a proof term assignment to these classical substructural logics. According to these notions, we can classify the -terms into four categories. It is proved that well-typed GLx--terms correspond to GLx proofs, and that a GLx--term has a principal type if stratified where x is nil, c, w or cw. Moreover, we investigate embeddings of classical substructural logics into the corresponding intuitionistic substructural logics. It is proved that the Gödel-style translations of GLx--terms are embeddings preserving substructural logics. As by-products, it is obtained that an inhabitation problem is decidable and well-typed GLx--terms are strongly normalizable. (shrink)

The author proposes sustainability as the criterion for business ethics. The argument here is that in today’s world, business success depends on sustainability. This in turn depends on respect for the environment, employees, customers and stakeholders at large. Thinking about ethics in terms of sustainability involves thinking about ethics in strategic terms. Indeed sustainability could and should be raised to the status of a global ethic. There is evidence to show that corporate social responsibility pays; e.g. the Dow Jones sustainability (...) group index outperformed the Dow Jones index by 36% over the past three‐year period. This suggests that taking ethics seriously goes hand in hand with successful business. (shrink)

The following is an essay on the notion of scientific explanation as unification. In it a new notion of content is used to explicate Michael Friedman's notion of "k-atomicity," and to explicate the notion of the surplus content of hypothesis h relative to evidence e. From this basis an analysis of unification as theoretical reduction is advanced. A second notion of unification, unification as reconciling prima facie incompatible statements, is introduced again with the aid of this new notion of content. (...) More generally, it is argued that rather than seek the essence of scientific explanation we should carefully catalog the various distinct explanatory virtues. Finally it is argue that in particular philosophical explanations put a high premium on the quality of unification through showing how to make compatible seemingly irreconcilable claims. (shrink)

This paper introduces Richard Montague's theory of determiner phrases to the philosophically oriented readers who are familiar with Russell's traditional treatment. Determiner phrases include not only quantifier phrases in the narrow sense, such as every man, some woman, and nothing, but also DP conjunctions such as Adam and Betty and Adam or Betty, and even proper names such as Adam and Betty. Montague treats all determiner phrases as belonging to type t, i.e., the type of functions from properties of individuals (...) to truth values. This paper also introduces the simply typed lambda-calculus for the explication of Montague's theory. Two major problems with Montague's theory, one more philosophical and the other more linguistic, are discussed. (shrink)

The attempt to explicate the intuitive notions of confirmation and inductive support through use of the formal calculus of probability received its canonical formulation in Carnap's The Logical Foundations of Probability. It is a central part of modern Bayesianism as developed recently, for instance, by Paul Horwich and John Earman. Carnap places much emphasis on the identification of confirmation with the notion of probabilistic favorable relevance. Notoriously, the notion of confirmation as probabilistic favorable relevance violates the intuitive transmittability condition that (...) if e confirms h and h' is part of the content of h then e confirms h'. This suggests that, pace Carnap, it cannot capture our intuitive notions of confirmation and inductive support. Without transmittability confirmation losses much of its intrinsic interest. If e, say a report of past observations, can confirm h, say a law-like generalization, without that confirmation being transmitted to those parts of h dealing with the as yet unobserved, then it is not clear why we should be interested in whether h is confirmed or not. The following paper rehearses these difficulties and then proposes a new probabilistic account of confirmation that does not violate the transmittability condition. (shrink)

The purpose of this paper is to review and discuss Luciano Floridi’s 2019 book The Logic of Information: A Theory of Philosophy as Conceptual Design, the latest instalment in his philosophy of information (PI) tetralogy, particularly with respect to its implications for library and information studies (LIS) .

Savage denied that Bayesian decision theory applies in large worlds. This paper proposes a minimal extension of Bayesian decision theory to a large-world context that evaluates an event E\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$E$$\end{document} by assigning it a number π\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\pi $$\end{document} that reduces to an orthodox probability for a class of measurable events. The Hurwicz criterion evaluates π\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\pi $$\end{document} (...) as a weighted arithmetic mean of its upper and lower probabilities, which we derive from the measurable supersets and subsets of E\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$E$$\end{document}. The ambiguity aversion reported in experiments on the Ellsberg paradox is then explained by assigning a larger weight to the lower probability of winning than to the upper probability. However, arguments are given here that would make anything but equal weights irrational when using the Hurwicz criterion. The paper continues by embedding the Hurwicz criterion in an extension of expected utility theory that we call expectant utility. (shrink)

Although the effects of pro-organizational motives on pro-organizational behaviors [i.e., unethical pro-organizational behavior and organizational citizenship behavior ] and their boundaries have been explored to some extent, extant studies are rather piecemeal and in need of synthesis and extension. Based on prior motivational research on pro-organizational behaviors, we developed a comprehensive contingent model in which moral identity and impression management motives would moderate the links between pro-organizational motives, UPB, and OCB. Adopting a time-lagged design, we collected data from 218 salespeople (...) in an internet technology service company in China. Results showed that pro-organizational motives were positively related to UPB and OCB. Moral identity weakened the impact of pro-organizational motives on UPB but strengthened the influence of pro-organizational motives on OCB. Furthermore, we found that impression management motives strengthened the effects of pro-organizational motives on UPB and OCB, and the interaction of impression management motives and pro-organizational motives was stronger on UPB than on OCB. Theoretical and practical implications, limitations, and future directions are discussed. (shrink)

There is an epistemological skepticism that I might be dreaming now, or I might be a brain in a vat (BIV). There is also a demonstration that derives the skeptical conclusion about knowledge of the external world from the premise C1, i.e., I do not know “I am not dreaming (not a BIV) now.” Pessimistic critics (e.g., F. Strawson, B. Stroud) consider that the refutation of C1 is impossible, whereas others have attempted the direct refutation of C1 (e.g., G. E. (...) Moore, H. Putnam, C. Wright), and some (e.g., F. Dretske, R. Nozick) have attempted to refute the closure principle of knowledge used in the demonstration while permitting the validity of C1. Another scholar, M. Williams, maintains that the skeptical demonstration is true only if we presuppose the epistemological premise that we choose to accept or reject at will. It seems that most critics tend to adopt a strategy that allows them to effectively avoid the skeptical consequence, thereby conceding the validity of C1. However, it is difficult to say whether their attempts succeeded, and in my opinion, they are indeed unsuccessful. This is because their concession to Descartes’ argument is insufficient. Their lack of success could also stem from the incompletion of Descartes’ own methodological doubt. The somewhat paradoxical‐sounding aim of this thesis is to show that the skeptical paradox about knowledge can be dissolved only if the Cartesian skepticism is extended far beyond the endpoint of his attempt. The argument of this thesis is based on the important arguments of Wittgenstein's On Certainty （OC）. (shrink)

For over a century now, American scholars (among others) have been debating the merits of “bad Samaritan” laws — laws punishing people for failing to attempt easy and safe rescues. Unfortunately, the opponents of bad Samaritan laws have mostly prevailed. In the United States, the “no-duty-to-rescue” rule dominates. Only four states have passed bad Samaritan laws, and these laws impose only the most minimal punishment — either sub-$500 fines or short-term imprisonment. -/- This Article argues that every state should criminalize (...) bad Samaritanism. There are three main reasons. First, criminalization is required by the supreme value that we place on protecting human life, a value that motivates laws against both homicide and manslaughter. Second, criminalization is recommended by the “proportionality principle” — i.e., the principle that a law’s level of punishment should be directly proportional to the moral severity of the offense. Third, criminalization would yield a number of significant benefits, including helping to minimize needless deaths and injuries and providing society with an institutional outlet for its outrage against bad Samaritans. -/- Still, many objections have been leveled against bad Samaritan laws. This Article will argue that while some of these objections — for example, the objections involving foundational criminal law principles such as the actus-reus requirement, the harm principle, and causation — are all easily refuted, five other objections are not. These five objections involve pragmatic considerations such as the difficulties with obtaining evidence against bad Samaritans and psychological considerations such as people’s understandable reasons for not wanting to “get involved.” This Article will then put these five objections into reflective equilibrium with the moral arguments for bad Samaritan laws and conclude that while bad Samaritanism should indeed be criminalized, the punishment that convicted bad Samaritans receive should be mild — certainly milder than the level of punishment recommended by the “proportionality principle.” The corollary of this conclusion is that the criminal law should sometimes abandon the proportionality principle. (shrink)

A surprisingly large number of scholars believe that (a) we are blameworthy, and therefore punishable, only for what we have control over; (b) we have control only over our actions and intentions, not the consequences of our actions; and therefore (c) if two agents perform the very same action (e.g., attempting to kill) with the very same intentions, then they are equally blameworthy and deserving of equal punishment – even if only one of them succeeds in killing. This paper argues (...) against these “equivalence theorists” that harmful consequences do make a moral difference, that the harm produced by the killer’s attempt retroactively makes her action more blameworthy, and therefore deserving of more punishment, than the failed attempter’s attempt. The primary argument for this “non-equivalence theory” is an analogy with gambling. Just as a gambler makes a deal with the casino to allow metaphysical luck to retroactively determine the “profit status” of her bet, so too the attempted killer makes a deal with “the casino of morality” to allow metaphysical luck to retroactively determine the moral status of her attempt. She makes the “moral deal” that if her attempt succeeds, her attempt was more blameworthy than if her attempt does not succeed. And it is the greater blameworthiness of the killer’s attempt that justifies our intuition that the killer should be punished more harshly than the failed attempter. (shrink)

Bayesians standardly identify irrelevance with probabilistic irrelevance. However, there are cases where e is probabilistically irrelevant to h but intuitively e is relevant to h. For instance, ‘Die A came up 1 and die B came up 1, 3, 5 or 6’ is probabilistically irrelevant to ‘Die A came up odd and die B came up even’, yet, intuitively, it is not, irrelevant to that claim, in the sense that ‘Sydney has a harbour Bridge’ is irrelevant to it. In the (...) context of decision making this notion of irrelevance combined with such rules as ‘Do not expend resources on irrelevant evidence’ leads to bad results. A stronger notion of irrelevance fitting our intuitions and the contexts of decision making is proposed: e is irrelevant to h if and only if every part of e is probabilistically irrelevant to every part of h. However, we need to take care in determining what counts as part of a statement. (shrink)

Ageing is basically a natural or physical phenomenon. For a human being, it belongs to the body. When this fact is noticed, a drama of oldness and life/death begins: ageing is a problem of experience. There are losses and gains in this experience. Indeed, a particular respect was paid to a rhapsodist/bard and a hermit because of their memory power and deep wisdom respectively. Since we recognize in these cases accumulation and maturation, the core subject in the experience of ageing (...) is memory and the time structure. Vis-à-vis the hard memories such as stone monuments and IC memory, the live memory is characterised by a creativity, which vivifies our past time. I pay a particular attention to friendship, because one of the most painful experiences of ageing consists in the loss of dear friends. Recollecting creatively the time shared with them, we can vivify our past, i.e. our being: that is the appropriation of ourselves. (shrink)

This paper presents the development andvalidation of new measurement tools to exploreself-efficacy toward service and toward civicparticipation. We developed and administereda survey to 851 students in an AACSB-accreditedcollege of business at a comprehensive publicuniversity located in the Midwest. Traditionalscale development methodologies plusconfirmatory factor analysis and simultaneousfactor analysis in several populations wereused to analyze both a primary sample and aholdback sample. Results strongly support thevalidity and reliability of the surveyinstrument. Future use for the instrumentincludes verification of the effectiveness ofpedagogies designed to (...) increase self-efficacytoward service and motivation for civicparticipation in business students. (shrink)

In the rod‐shaped cells of E. coli, chromosome segregation takes place immediately after replication has been completed. A septum then forms between the two sister chromosomes. In the absence of certain membrane proteins, cells grow instead as large, multichromosomal spheres that divide successively in planes that are at right angles to one another. Although multichromosomal, the spherical cells cannot be maintained as heterozygotes. These observations imply that, in these mutants, each individual chromosome gives rise to a separate clone of descendant (...) cells. This suggests a model in which sites for cell division form between pairs of sister chromosomes at the time of segregation, but are not used in spherical cells until further rounds of replication have taken place, thus ensuring clonal (‘hierarchical’) segregation of chromosomes into progeny cells. The role of the morphogenetic membrane proteins is to convert the basically spherical cell into a cylinder that is able to divide as soon as replication and segregation have been completed, and thus to maximise the number of viable cells per genome. (shrink)

In this paper, we discuss some rather puzzling facts concerning the semantics of Warlpiri expressions of cardinality, i.e. the Warlpiri counterparts of English expressions like one,two, many, how many. The morphosyntactic evidence, discussed in section 1, suggests that the corresponding expressions in Warlpiri are nominal, just like the Warlpiri counterparts of prototypical nouns, eg. child. We also argue that Warlpiri has no articles or any other items of the syntactic category D(eterminer). In section 2, we describe three types of readings— (...) "definite", "indefinite" and "predicative"—which are generally found with Warlpiri nouns, including those which correspond to English common nouns and cardinality expressions. A partial analysis of these readings is sketched i n section 3. Since Warlpiri has no determiner system, we hypothesize that the source of (in)definiteness in this language is semantic. More specifically, we suggest that Warlpiri nominals are basically interpreted as individual terms or predicates of individuals and that their three readings arise as a consequence of the interaction of their basic meanings, which are specific to Warlpiri, with certain semantic operations, such as type shifting (Rooth and Partee 1982, Partee and Rooth 1983, Partee 1986, 1987), which universally can or must apply in the process of compositional semantic interpretation. (shrink)

Ergative languages make up a substantial percentage of the world’s languages. They have a case system which distinguishes the subject of a transitive verb from that of an intransitive, grouping the latter with the object — that is, the object of a transitive verb and the subject of an intransitive verb are in the same case, which we refer to as the nominative. However, ergative languages differ from one another in important ways. In Greenlandic Eskimo the nominative, whether it is (...) a subject or an object, is syntactically prominent in the clause, much like a subject in English; but in Warlpiri, the nominative is not prominent, more like an object. The variable prominence of the nominative manifests itself as well in the semantics, e.g., default scope of indefinite and quantified nominals. Using data from Greenlandic Eskimo and Warlpiri, and from Hindi, which represents a split ergative system, this paper develops a general theory of case which explains the observed differences amongst ergative languages. In addition, the theory is designed to account for the accusative language type, represented by English. (shrink)

Individuals with autism spectrum disorders (ASD) are impaired not only in social competencies but also in sensory perception, particularly olfaction. The olfactory ability of individuals with ASD has been examined in several psychophysical studies, but the results have been highly variable, which might be primarily due to methodological difficulties in the control of odor stimuli (e.g., the problem of lingering scents). In addition, the neural correlates of olfactory specificities in individuals with ASD remain largely unknown. To date, only one study (...) has investigated this issue using functional magnetic resonance imaging (fMRI). The present study utilized a sophisticated method−a pulse ejection system−to present well-controlled odor stimuli to participants with ASD using an ASD-friendly application. With this advantageous system, we examined their odor detection, identification, and evaluation abilities and measured their brain activity evoked by odors using functional near-infrared spectroscopy (fNIRS). As the odor detection threshold (DT) of participants with ASD was highly variable, these participants were divided into two groups according to their DT: an ASD-Low DT group and an ASD-High DT group. Behavioral results showed that the ASD-High DT group had a significantly higher DT than the typically developing (control) group and the ASD-Low DT group, indicating their insensitivity to the tested odors. In addition, while there was no significant difference in the odor identification ability between groups, there was some discrepancy between the groups’ evaluations of odor pleasantness. The brain data identified, for the first time, that neural activity in the right dorsolateral prefrontal cortex (DLPFC) was significantly weaker in the ASD-High DT group than in the control group. Moreover, the strength of activity in the right DLPFC was negatively correlated with the DT. These findings suggest that participants with ASD have impairments in the higher-order function of olfactory processing, such as olfactory working memory and/or attention. (shrink)

In evaluating a metatheory, it is possible and desirable to use methods found in critical metatheory. In this post, I use such tools to rigorously analyze and quantify the internal logical structure of Wilber's metatheory. The results show that Wilber's metatheory is unlikely to be of much use in practical application and that it has much room for growth and improvement.

Objectives: Neuroplastic changes that drive recovery of shoulder/elbow function after stroke have been poorly understood. The purpose of this study was to determine the relationship between neuroplastic brain changes related to shoulder/elbow movement control in response to treatment and recovery of arm motor function in chronic stroke survivors.Methods: Twenty-three chronic stroke survivors were treated with 12 weeks of arm rehabilitation. Outcome measures included functional Magnetic Resonance Imaging (fMRI) for the shoulder/elbow components of reach and a skilled motor function test (Arm (...) Motor Abilities Test, AMAT), collected before and after treatment.Results: We observed two patterns of neuroplastic changes that were associated with gains in motor function: decreased or increased task-related brain activation. Those with significantly better motor function at baseline exhibited a decrease in brain activation in response to treatment, evident in the ipsilesional primary motor and contralesional supplementary motor regions; in contrast, those with greater baseline motor impairment, exhibited increased brain activation in response to treatment. There was a linear relationship between greater functional gain (AMAT) and increased activation in bilateral primary motor, contralesional primary and secondary sensory regions, and contralesional lateral premotor area, after adjusting for baseline AMAT, age, and time since stroke.Conclusions: Recovery of functional reach involves recruitment of several contralesional and bilateral primary motor regions. In response to intensive therapy, the direction of functional brain change (i.e., increase or decrease in task-related brain recruitment) for shoulder/elbow reach components depends on baseline level of motor function and may represent either different phases of recovery or different patterns of neuroplasticity that drive functional recovery. (shrink)

When people talk about kinship systems, they often use co-speech gestures and other representations to elaborate. This paper investigates such polysemiotic (spoken, gestured, and drawn) descriptions of kinship relations, to see if they display recurring patterns of conventionalization that capture specific social structures. We present an exploratory hypothesis-generating study of descriptions produced by a lesser-known ethnolinguistic community to the cognitive sciences: the Paamese people of Vanuatu. Forty Paamese speakers were asked to talk about their family in semi-guided kinship interviews. Analyses (...) of the speech, gesture, and drawings produced during these interviews revealed that lineality (i.e., mother's side vs. father's side) is lateralized in the speaker's gesture space. In other words, kinship members of the speaker's matriline are placed on the left side of the speaker's body and those of the patriline are placed on their right side, when they are mentioned in speech. Moreover, we find that the gesture produced by Paamese participants during verbal descriptions of marital relations are performed significantly more often on two diagonal directions of the sagittal axis. We show that these diagonals are also found in the few diagrams that participants drew on the ground to augment their verbo-gestural descriptions of marriage practices with drawing. We interpret this behavior as evidence of a spatial template, which Paamese speakers activate to think and communicate about family relations. We therefore argue that extending investigations of kinship structures beyond kinship terminologies alone can unveil additional key factors that shape kinship cognition and communication and hereby provide further insights into the diversity of social structures. (shrink)