I. INTRODUCTIONThe Parshall Flume, which was invented in 1920 by R. Parshall, is mostly used in wastewater and crop supply. Utilizing equations, Parshall established dimensions that fit the design, one of the advantages is the conversion of position energy to velocity energy since in other measurement structures there are minimum energy losses in this one it does not allow sedimentation. The structuring of the project is adhered to by different models that define its behavior and limit its use. This is (...) the case of an approach length of the channel entrance, which is nothing more than a primary distance for the action of the flow within the channel. Throughout history, some studies were conducted in an attempt to establish an approximate and realistic value of the length at the time of measurements, but the theories put forward were lost. Some people link this length with the narrowing of the gorge, and others suggest flow conditions before entering the flume. For the development of the project established with its respective objectives, the respective structuring was carried out: For the measurement, the points already established in the field will be taken with the help of a total station, GPS, to verify the respective measurements of the Parshall flume. For the calculations and the design, the points will be introduced in the civil 3D to be able to verify if the points taken are the correct ones and what distances they have between them, through this, we can apply different methods to be able to verify the design that has this Parshall flume. For the evaluation and layout of the gutter, if it is the case, we will carry out a layout in plan with the data already calculated in the office and we will evaluate the situation in which it is so that we can apply a possible solution so that a defect does not occur. In this report, we focus on the design and redesign of a hydraulic irrigation channel where we find a Parshall section, which has the function of measuring the flow found in that section. The measurements found in the field can be verified in the office using formulas and software to verify if the data are correct, if so we can say that it is well designed, otherwise we will look for a possible solution by doing a field study. (shrink)

Background: Heart rate variability (HRV) has been considered as a measure of heart-brain interaction and autonomic modulation, and it is modified by cognitive and attentional tasks. In cognitive tasks, HRV was reduced in participants who achieved worse results. This could indicate the possibility of HRV predicting cognitive performance, but this association is still unclear in a high cognitive load sport such as chess Objective: To analyse modifications on HRV and subjective perception of stress, difficulty and complexity in different chess problem (...) tasks. Design: HRV was assessed at baseline. During the chess problems, HRV was also monitored, and immediately after chess problems the subjective stress, difficulty and complexity were also registered. Method: A total of 16 male chess players, age: 35.19 (13.44) and ELO: 1927.69 (167.78) were analysed while six chess problem solving tasks with different level of difficulty were conducted (two low level, two medium level and two high level chess problems). Participants were classified according to their results into two groups: high performance or low performance. Results: Friedman test showed a significant effect of tasks in HRV indexes and perceived difficulty, stress and complexity in both high and low performance groups. A decrease in HRV was observed in both groups when chess problems difficulty increased. In addition, HRV was significantly higher in the high performance group than in the low performance group during chess problems. Conclusions: An increase in autonomic modulation was observed to meet the cognitive demands of the problems, being higher while the difficulty of the tasks increased. Non-linear HRV indexes seem to be more reactive to tasks difficulty, being an interesting and useful tool in chess training. (shrink)

El objetivo del presente estudio es analizar algunos aspectos vinculados a la interpretación de la ley humana y su causa final en el pensamiento del teólogo, f ilósofo y jurista Español Francisco Suárez (1548-1617). En algunos autores resulta indudable su pertenencia a un modo de pensar determinado. Ello se observa, por mencionar algunos ejemplos, en los casos de Alberto Magno y Tomás de Aquino —identiicados con la edad media—. Por el contrario otros autores, aún medievales, desarrollaron doctrinas que se (...) constituyeron en preludio de elaboraciones posteriores modernas. Por este motivo tales figuras resultan fuertemente vinculadas a al- gunas corrientes de pensamiento modernas. Aquí puede mencionarse a Escoto, Ockham y Marsilio de Padua. Esta claridad recientemente señalada no se observa en relación a Francisco Suárez quien aparece como un autor controvertido y considerado de transición, por lo menos temporalmente, entre edad media y moderna. Las discusiones actuales en torno a Suárez se deben a la inexistencia de un cierto consenso respecto al lugar que le corresponde a su doctrina, especialmente filosófico-política, entre las concepciones que caracterizan a los períodos antiguo-medieval y moderno. Por estos motivos esta investigación persigue def inir la ubicación del pensamiento suareciano, en relación al tema propuesto, y de acuerdo a lo que nuestro autor expone en su Tratado de la Ley. (shrink)

Es a todas luces evidente que los cambios globales de las últimas décadas, connotados entre otras cuestiones por el desplazamiento masivo de personas y la consolidación de identidades nacionales más borrosas y cambiantes, han repercutido de una manera significativa sobre el mundo académico, con la consecuente renovación de sus intereses. El auge adquirido por el estudio del exilio en América latina forma parte de esta nueva realidad. A la diversificación temática y aparición de nuevos y más sofisticados enfoques se han (...) sumado numerosos congresos y jornadas de estudio y debate, una importante cantidad de libros y artículos y la consolidación de grupos y redes de investigación internacionales. La publicación de Exile, Diaspora and Return es una prueba de este auge. Representa una excelente puesta al día de los alcances y sutileza de los estudios más recientes, a la vez que da cuenta de las decisivas vinculaciones de la cuestión con temas amplios como la globalización, los cambios en la idea de ciudadanía o las transiciones democráticas... (shrink)

Los Estados Unidos de América no emergieron como una auténtica nación con sólidas instituciones estatales hasta bien entrado el siglo XIX, pese a compartir una cultura común. La estructura conf igurada inicialmente para sostener su vínculo político fue el foedus o alianza entre Estados del Derecho de gentes, y el objetivo de este trabajo es precisar en qué medida influiría en la articulación constitucional de la joven república, desde su proclamación de la independencia hasta la Convención de Filadelf ia de (...) 1787. Para ello se examina la influencia de pensadores como Vattel, Montesquieu o Pufendorf en los colonos americanos y se expone el conflicto entre unos y otros Estados de la Unión. El resultado del estudio apunta a que la fórmula federativa que le permitió a la república ser reconocida por las naciones europeas le sirvió también para aplazar sus conflictos internos, y de modo muy especial el referente a la esclavitud, merced a una dinámica territorial de carácter expansivo. (shrink)

Francisco de Miranda (1750-1816), militar, viajero ilustrado, y, sobre todo, precursor de la independencia latinoamericana, ha sido objeto de numerosos estudios biográficos centrados fundamentalmente en su vida azarosa y aventurera. Sin embargo, su periplo intelectual ha sido investigado en un grado mucho menor, sobre todo en lo que se refiere a su meditación constitucional. El presente artículo tiene como fin, precisamente el de estudiar la relación de su pensamiento con la actuación política que le condujofinalmente a convertirse en Generalísimo de (...) la república de Venezuela en el año 1812, llegando a concentrar poderes excepcionales para hacer frente a la metrópoli española. De resultas de tal investigación puede concluirse que Miranda hizo una lectura de diversos autores ilustrados conocidos en Europa y el Nuevo Mundo, pero que también extrajo distintas reflexiones de su propia experiencia política por haber tomado parte en las dos grandes revoluciones del siglo XVIII. (shrink)

God is the creator of the laws of nature and therefore he is able to change and to irrupt them. The suspension of one norm is completely consistent with the affirmation of the law as a whole; and therefore the miracle underlines the eternal law as valid and the fidelity of God.

In this book Saul Kripke brings his powerful philosophical intelligence to bear on Wittgenstein's analysis of the notion of following a rule.

_Naming and Necessity_ has had a great and increasing influence. It redirected philosophical attention to neglected questions of natural and metaphysical necessity and to the connections between these and theories of naming, and of identity. This seminal work, to which today's thriving essentialist metaphysics largely owes its impetus, is here reissued in a newly corrected form with a new preface by the author. If there is such a thing as essential reading in metaphysics, or in philosophy of language, this is (...) it. (shrink)

This essay explores the speech act of dogwhistling (sometimes referred to as ‘using coded language’). Dogwhistles may be overt or covert, and within each of these categories may be intentional or unintentional. Dogwhistles are a powerful form of political speech, allowing people to be manipulated in ways they would resist if the manipulation was carried outmore openly—often drawing on racist attitudes that are consciously rejected. If philosophers focus only on content expressed or otherwise consciously conveyed they may miss what is (...) most powerful and pernicious in the speech of political culture. This essay is a call to start paying attention to these more covert speech acts, and a first attempt at beginning to theorize them. It argues that dogwhistles present a complex and interesting case for the philosopher of language, and explores their implications for democratic politics. (shrink)

Substitution and simple sentences -- Simple sentences and semantics -- Simple sentences and implicatures -- The enlightenment problem and a common assumption -- Abandoning (EOI) -- Beyond matching propositions -- App. A : extending the account -- App. B : belief reporting.

Denialism concerning free will and moral responsibility combines, in its minimal form, the rejection of libertarian free will and the rejection of compatibilism. I will address the more ambitiously “happy” or “optimistic” version of denialism, which also claims that we are better off without belief in free will and moral responsibility, and ought to try to radically reform our moral, social and personal lives without such beliefs. I argue that such denialism involves, for various reasons, a dangerous gamble, which it (...) would be morally irresponsible to follow. I conclude by reflecting upon the implications. (shrink)

This article provides a state of the art review of the philosophical literature on scientific representation. It first argues that the topic emerges historically mainly out of what may be called the modelling tradition. It then introduces a number of helpful analytical distinctions, and goes on to divide contemporary approaches to scientific representation into two distinct kinds, substantive and deflationary. Analogies with related discussions of artistic representation in aesthetics, and of the nature of truth in metaphysics are pursued. It is (...) finally urged that the most promising approaches - and the ones most likely to feature prominently in future developments - are deflationary. In particular, a defence is provided of a genuinely inferential conception of representation. (shrink)

This article provides a state-of-the-art review of the philosophical literature on scientific representation. It first argues that the topic emerges historically mainly out of what may be called the modelling tradition. It then introduces a number of helpful analytical distinctions and goes on to divide contemporary approaches to scientific representation into two distinct kinds, substantive and deflationary. Analogies with related discussions of artistic representation in aesthetics and the nature of truth in metaphysics are pursued. It is finally urged that the (...) most promising approaches—and the ones most likely to feature prominently in future developments—are deflationary. In particular, a defense is provided of a genuinely inferential conception of representation. (shrink)

As the premier early modern advocate of an Epicurean alternative to the prevailing neo-Scholastic framework of Aristotelianism, Pierre Gassendi promoted not only ancient but also innovative reasoning on behalf of atomism, probabilism, empiricism, psychological hedonism, social contractarianism, and a range of other stances associated with the philosophy of the Garden. Much commentary has focused on the extent to which Gassendi ‘baptizes’ Epicurean thought. Beyond this aspect of his Epicureanism are questions as to whether, and how, Gassendi is true to core (...) Epicurean thinking, and what he preserves and promotes as valuable to philosophical and natural investigations of his time. Indeed, much subsequent modern philosophy builds on or reacts to an Epicurean legacy bequeathed by Gassendi, comprising his adjustments to, constraints on, or corrections of, the canonical views. Yet, for all his amendments, he retains as a primary philosophical motivation the Epicurean goal of striving for ataraxia. In this, he signals his firm commitment to philosophy in the tradition of the canonical Epicurean views. And, as with Epicurus’ own notion, his account of the centrality of attaining tranquility directs us to a better understanding of our nature and that of the world around us; amenable, in Gassendi’s framework, to Christian thought and contemporary natural philosophical investigations. (shrink)

On a purely epistemic understanding of experimental realism, manipulation affords a particularly robust kind of causal warrant, which is – like any other warrant – defeasible. I defend a version of Nancy Cartwright’s inference to the most likely cause, and I conclude that this minimally epistemic version of experimental realism is a coherent, adequate and plausible epistemology for science.

Bourrat and Griffiths :33, 2018) have recently argued that most of the evidence presented by holobiont defenders to support the thesis that holobionts are evolutionary individuals is not to the point and is not even adequate to discriminate multispecies evolutionary individuals from other multispecies assemblages that would not be considered evolutionary individuals by most holobiont defenders. They further argue that an adequate criterion to distinguish the two categories is fitness alignment, presenting the notion of fitness boundedness as a criterion that (...) allows divorcing true multispecies evolutionary individuals from other multispecies assemblages and provides an adequate criterion to single out genuine evolutionary multispecies assemblages. A consequence of their criterion is that holobionts, as conventionally defined by hologenome defenders, are not evolutionary individuals except in very rare cases, and for very specific host-symbiont associations. This paper is a critical response to Bourrat and Griffiths’ arguments and a defence of the arguments presented by holobiont defenders. Drawing upon the case of the hologenomic basis of the evolution of sanguivory in vampire bats, I argue that Bourrat and Griffiths overlook some aspects of the biological nature of the microbiome that justifies the thesis that holobionts are evolutionarily different to other multispecies assemblages. I argue that the hologenome theory of evolution should not define the hologenome as a collection of genomes, but as the sum of the host genome plus some traits of the microbiome which together constitute an evolutionary individual, a conception I refer to as the stability of traits conception of the hologenome. Based on that conception I argue that the evidence presented by holobiont defenders is to the point, and supports the thesis that holobionts are evolutionary individuals. In this sense, the paper offers an account of the holobiont that aims to foster a dialogue between hologenome advocates and hologenome critics. (shrink)

Contemporary biological research has suggested that some host–microbiome multispecies systems (referred to as “holobionts”) can in certain circumstances evolve as unique biological individual, thus being a unit of selection in evolution. If this is so, then it is arguably the case that some biological adaptations have evolved at the level of the multispecies system, what we call hologenomic adaptations. However, no research has yet been devoted to investigating their nature, or how these adaptations can be distinguished from adaptations at the (...) species-level (genomic adaptations). In this paper, we cover this gap by investigating the nature of hologenomic adaptations. By drawing on the case of the evolution of sanguivory diet in vampire bats, we argue that a trait constitutes a hologenomic adaptation when its evolution can only be explained if the holobiont is considered the biological individual that manifests this adaptation, while the bacterial taxa that bear the trait are only opportunistic beneficiaries of it. We then use the philosophical notions of emergence and inter-identity to explain the nature of this form of individuality and argue why it is special of holobionts. Overall, our paper illustrates how the use of philosophical concepts can illuminate scientific discussions, in the trend of what has recently been called metaphysics of biology. (shrink)

Albert and De Ruiter provide an introduction to the Conversation Analytic approach to ‘repair’: the ways in which people detect and deal with troubles in speaking, hearing and understanding in conversation. They explain the basic turn‐taking structures involved, provide examples, explain recent developments in the field and highlight some important points of contact and contrast with work in the Cognitive Sciences.

In a wide-ranging, provocative anatomy of modern society and its origins, novelist and historian John Ralston Saul explores the reason for our deepening sense of crisis and confusion. Throughout the Western world we talk endlessly of individual freedom, yet Saul shows that there has never before been such pressure for conformity. Our business leaders describe themselves as capitalists, yet most are corporate employees and financial speculators. We are obsessed with competition, yet the single largest item of international trade is a (...) subsidized market in armaments. We call our governments democracies, yet few of us participate in politics. We complain about "invasive government," yet our legal, educational, financial, social, cultural and legislative systems are breaking down. While most observers view these problems separately, Saul demonstrates that they are largely manifestations of our blind faith in the value of reason. Over the last 400 years, our "rational elites" have gradually instituted reforms in every phase of social life. But Saul shows that they have also been responsible for most of the difficulties and violence of the same period. This paradox arises from a simple truth which our elites deny: far from being a moral force, reason is no more than an administrative method. Their denial has helped to turn the modern West into a vast, incomprehensible, directionless machine, run by process-minded experts - "Voltaire's bastards"--Whose cult of scientific management is bereft of both sense and morality. Whether in politics, art, business, the military, entertainment, science, finance, academia or journalism, these experts share the same outlook and methods. The result, Saul maintains, is a civilization of immense technological power whose peoples increasingly dwell in a world of illusion. Already known to millions of readers as the author of novels which portray the overwhelming effects of this power on the modern individual by weaving together international finance, the oil and arms business, guerrilla warfare, drug traffic, and the world of art, here Saul lays aside the mask of fiction to speak in his own voice. Only by withdrawing from our addiction to "solutions," he argues, reclaiming the citizens' right to question and participate in public life, and recovering a common sense capacity for intelligent panic, can we find a way out of our permanent crisis. (shrink)

In this paper I present a formalization of the theory of ideal concepts applied to the concept of God. It is done within a version of the Simplest Quantified Modal Logic (SQML) and attempts to solve three meta-problems related to the concept of God: the unicity of extension problem, the homogeneity/heterogeneity problem and the problem of conceptual unity.

The hologenome concept of evolution is a hypothesis about the evolution of animals and plants. It asserts that the evolution of animals and plants was partially triggered by their interactions with their symbiotic microbiomes. In that vein, the hologenome concept posits that the holobiont (animal host + symbionts of the microbiome) is a unit of selection. -/- The hologenome concept has been severely criticized on the basis that selection on holobionts would only be possible if there were a tight transgenerational (...) host-genotype-to-symbiont-genotype connection. As our current evidence suggests that this is not the case for most of the symbiont species that compose the microbiome of animals and plants, the opportunity for holobiont selection is very low in relation to the opportunity for selection on each of the species that compose the host microbiome. Therefore, holobiont selection will always be disrupted ‘from below’, by selection on each of the species that compose the microbiome. -/- This thesis constitutes a conceptual effort to defend philosophically the hologenome concept. I argue that the criticism according to which holobiont selection requires tight transgenerational host-genotype-to-symbiont-genotype connection is grounded on a metaphysical view of the world according to which the biological hierarchy needs to be nested, such that each new level of selection includes every entity from below. Applied to hologenomes, it entails that the hologenome is a collection of genomes, and selection of hologenomes is assumed to entail cospeciation of the host with the species that constitute its microbiome. -/- Against that interpretation, I propose the ‘stability of traits’ account, according to which hologenome evolution is the result of the action of natural selection in a non-nested hierarchical world. In that vein, hologenome evolution does not entail cospeciation, and thus it does not require tight transgenerational host-genotype-to-symbiont-genotype connection. By embracing a multilevel selection perspective, I argue that hologenome evolution results from the simultaneous action of natural selection on each of the lineages that compose the microbiome, and on the assemblage composed by the host genome plus the functional traits of its microbiome. Hologenome selection occurs when the evolution of the traits of the microbiome result from their effects on the fitness of the host, and it can take the form of multilevel selection 1, or multilevel selection 2. In both cases, hologenome selection entails the evolution of microbiome traits, as well as evolution of the host genome, rather than cospeciation of lineages. (shrink)

Em analogia com outras discriminações, como o racismo ou o sexismo, o especismo é concebido como uma forma de discriminação moral com base na espécie. Em grande medida, a discussão contemporânea sobre a importância moral dos animais surgiu e desenvolveu-se em torno da crítica e da defesa do especismo. Este artigo oferece uma visão da discussão filosófica contemporânea sobre o especismo. Após uma breve introdução, apresenta-se uma definição de especismo e caracterizam-se vários tipos de especismo, sendo o Antropocentrismo o mais (...) relevante. Depois, expõe-se um argumento proeminente contra o Antropocentrismo: o argumento dos casos marginais. Por fim, algumas posições antropocêntricas são criticamente discutidas. (shrink)

This paper suggests the democratic direction in which the right of freedom of expression should be conceived and applied. In the first two sections it suggests some counter-examples to, and diagnoses of, the libertarian and liberal conceptions of freedom of expression, taking Scanlon (1972) and Scanlon (1979), respectively, to be their chief proponents. The paper suggests that these conceptions cannot take into account clear examples, like fraudulent propaganda, which should not be legal. The democratic conception takes it to heart that (...) the pillars upon which the right of freedom of expression is founded are individual and collective autonomy, the right to know facts of public interest and information necessary for effective democratic control of government. The paper suggests that in a time when private powers seriously threaten these pillars, it is correct for the government to step in to provide the framework in which genuine discussion geared toward fulfilling the objectives of these pillars can take place. (shrink)

The notion of social progress is not much in favour in these sophisticated times of scepticism, cynicism, relativism and political correctness; at least in the West. Most people might admit that some indubitable advances have occurred, primarily in terms of this or that useful technological innovation. But any wider claim about ‘social progress’ is often met by overwhelming doubt and suspicion, if not outright derision. I provide a short argument for belief in progress.

Tradición patrimonial y administración señorial en la América Latina Aspectos básicos del liberalismo brasileño del siglo XIX - El pensamiento conservador en Colombia, a lo largo del siglo XIX - El pensamiento conservador en Colombia, a lo largo del siglo XX - Iberoamérica como totalidad - Clientelismo mesianismo y liberación en la cultura Latinoamericana - Catequesis misionera y "saber de salvación" en el Brasil colonial - La filosofía brasileña en los siglos XVII, XVIII y XIX - La filosofía brasileña en (...) el siglo XX - Positivismo y realidad Latinoamericana - Cinco concepciones de la integración Latinoamericana - Etica y política en la cultura brasileña - Catolicismo y modernidad : la función moralizadora de la iglesia. (shrink)

In this essay, I focus on Lugones’s relatively lesser explored notion of playfulness. I weigh in on the debate about whether playfulness is necessary for what Lugones calls “world-traveling,” which enables one to recognize another person as a full subject. I argue that although the attribute of playfulness may not be necessary for world-traveling, it is necessary for collaborative world-making––creating a new, shared world that is opened through the activity of play.

Presenting ten diverse and original moral paradoxes, this cutting edge work of philosophical ethics makes a focused, concrete case for the centrality of paradoxes within morality. Explores what these paradoxes can teach us about morality and the human condition Considers a broad range of subjects, from familiar topics to rarely posed questions Makes a concrete case for the centrality of paradox within morality Asks whether the existence of moral paradox is a good or a bad thing Presents analytic moral philosophy (...) in a provocative, engaging and entertaining way; posing new questions, proposing possible solutions, and challenging the reader to wrestle with the paradoxes themselves. (shrink)

Ubico indicios de mitos nacionales analizando obras narrativas (de Borges y algunos otros autores), y dichos acerca de Borges, centrándome en cómo se verifica, en la narrativa de Borges, (y también en sus intervenciones públicas y en lo que se dice sobre su figura) la irrupción del peronismo. Propongo un cambio de escala: sin intentar interpretar los grandes momentos constitutivos entendiéndolos como mitos de origen, intento constituir series, de características cuasi-míticas, a partir de poner en relación a breves sintagmas que (...) se reiteran en distintas unidades narrativas. Elementos transversales, que van de un relato a otro. Sintagmas que se analizan tomando al conjunto de la obra de Borges como paradigma, y no sólo relatos aislados. En primer término, exploro ciertas constantes en algunos relatos del período 1945-54. Luego me detengo en una serie de versiones contemporáneas sobre un Borges ciego a quien un joven peronista ayuda a cruzar la calle. En tercer lugar. el tema de la aparición de relatos oníricos, literariamente enunciados, sobre personas con garra de pájaro, vinculándolos a los dilemas morales de la élite intelectual en los tiempos del primer peronismo. En tanto estos conjuntos tienen mucho en común con los mitos al ser reelaboraciones sucesivas de un elemento narrativo, podrían ser abordadas con métodos de análisis míticos propios de la antropología estructural. No obstante, el material utilizado tiene diferencias con las mitologías clásicas: a) tiene versiones orales, pero también escritas; b) hechos ficcionales, pero también históricos; c) admiten un orden cronológico verificable. Por lo tanto, arriesgo aquí una exploración metodológica y teórica más bien experimental, aunque deudora de Lévi-Strauss. Concluyo que en estos dos conjuntos se verifica el funcionamiento un sistema ideológico, que es el de la formación nacional argentina, con sus tensiones y crisis. (shrink)

Max Stirner was one of the most important and seminal thinkers of the mid-nineteenth century. In the shadows of Hegel, Stirner developed possibly the most radical and devastating critique ever of the discourses of modernity, incurring the ire of Marx, prefiguring Nietzsche, and having a major (though often unacknowledged) impact on diverse streams of thought, from existentialism to anarchism and autonomism, literary and artistic avant-gardes, and postmodern theory. This edited volume investigates Stirner's impact on critical thinking and social and political (...) thought, exploring his radical and contemporary importance as a political theorist. In unmasking the religiosity lurking behind discourses of humanism and rationalism, and the domination of the individual immanent within liberal modes of politics, Stirner demolished the ontological foundations and universal grand narratives of our modernity. His thought has implications for contemporary questions of ideology, power, subjectivity, ethics and action, and opens the way for entirely new forms of politics. (shrink)

Saul Smilansky presents an original new approach to the problem of free will, which lies at the heart of morality and self-understanding. He maintains that the key to the problem is the role played by illusion. Smilansky boldly claims that we could not live adequately with a complete awareness of the truth about human freedom and that illusion lies at the center of the human condition.

The units or levels of selection debate concerns the question of what kind of biological systems are stable enough that part of their evolution is a result of the process of natural selection acting at their level. Traditionally, the debate has concerned at least two different, though related, questions: the question of the level at which interaction with the environment occurs, and the question of the level at which reproduction occurs. In recent years, biologists and philosophers have discussed a new (...) aspect of this debate, namely the possibility that certain multi-species consortia formed by a host and its microbiome may act as a unit of selection. This thesis, however, has not been without criticism, as it is doubtful that such consortia could meet the conditions required to achieve the degree of stability that would allow them to experience natural selection. The purpose of this paper is to systematically examine such criticisms and to defend the thesis that the holobiont/hologenome can act as a genuine level of selection both in the form of an interactor and in the form of a reproducer. To do so, it will be argued that the microbiome should be characterized in functional rather than taxonomic terms. (shrink)

Sexting has been defined as sending, receiving, or forwarding sexually explicit messages, images, or photos to others through digital platforms, and can assume more consensual or more abusive and violent forms. This study aims to explore the prevalence of abusive sexting in Portuguese adolescents and the psychological characteristics of sexting abusers in terms of emotional and behavioral problems, potential markers of psychopathy, childhood trauma and maltreatment, and different forms of aggression. A cross-sectional study was conducted with 4,281 participants, aged 12–20 (...) years, of whom 204 engaged in abusive sexting behaviors and 182 self-identified as being a non-consensual sexting victim. Abusive sexting was more common among boys and middle adolescents, and abusive sexting victims were more likely to be children of single-parent families. Engaging in abusive sexting and being a victim of abusive sexting were also related to behavioral and emotional problems, callousness, experiences of neglect and abuse in childhood, and various forms of aggression. Implications for future research and intervention are discussed. (shrink)