Disjunct eddy covariance measurements of volatile organic compound fluxes using proton transfer reaction mass spectrometry

Volatile organic compounds (VOCs) are emitted into the atmosphere from natural and anthropogenic sources, vegetation being the dominant source on a global scale. Some of these reactive compounds are deemed major contributors or inhibitors to aerosol particle formation and growth, thus making VOC measurements essential for current climate change research. This thesis discusses ecosystem scale VOC fluxes measured above a boreal Scots pine dominated forest in southern Finland. The flux measurements were performed using the micrometeorological disjunct eddy covariance (DEC) method combined with proton transfer reaction mass spectrometry (PTR-MS), which is an online technique for measuring VOC concentrations. The measurement, calibration, and calculation procedures developed in this work proved to be well suited to long-term VOC concentration and flux measurements with PTR-MS. A new averaging approach based on running averaged covariance functions improved the determination of the lag time between wind and concentration measurements, which is a common challenge in DEC when measuring fluxes near the detection limit. The ecosystem scale emissions of methanol, acetaldehyde, and acetone were substantial. These three oxygenated VOCs made up about half of the total emissions, with the rest comprised of monoterpenes. Contrary to the traditional assumption that monoterpene emissions from Scots pine originate mainly as evaporation from specialized storage pools, the DEC measurements indicated a significant contribution from de novo biosynthesis to the ecosystem scale monoterpene emissions. This thesis offers practical guidelines for long-term DEC measurements with PTR-MS. In particular, the new averaging approach to the lag time determination seems useful in the automation of DEC flux calculations. Seasonal variation in the monoterpene biosynthesis and the detailed structure of a revised hybrid algorithm, describing both de novo and pool emissions, should be determined in further studies to improve biological realism in the modelling of monoterpene emissions from Scots pine forests. The increasing number of DEC measurements of oxygenated VOCs will probably enable better estimates of the role of these compounds in plant physiology and tropospheric chemistry. Keywords: disjunct eddy covariance, lag time determination, long-term flux measurements, proton transfer reaction mass spectrometry, Scots pine forests, volatile organic compounds

Roman Ingarden’s Objectivity vs. Subjectivity as a problem of Translatability

Ingarden (1962, 1964) postulates that artworks exist in an “Objective purely intentional” way. According to this view, objectivity and subjectivity are opposed forms of existence, parallel to the opposition between realism and idealism. Using arguments of cognitive science, experimental psychology, and semiotics, this lecture proposes that, particularly in the aesthetic phenomena, realism and idealism are not pure oppositions; rather they are aspects of a single process of cognition in different strata. Furthermore, the concept of realism can be conceived as an empirical extreme of idealism, and the concept of idealism can be conceived as a pre-operative extreme of realism. Both kind of systems of knowledge are mutually associated by a synecdoche, performing major tasks of mental order and categorisation. This contribution suggests that the supposed opposition between objectivity and subjectivity, raises, first of all, a problem of translatability, more than a problem of existential categories. Synecdoche seems to be a very basic transaction of the mind, establishing ontologies (in the more Ingardean way of the term). Wegrzecki (1994, 220) defines ontology as “the central domain of philosophy to which other its parts directly or indirectly refer”. Thus, ontology operates within philosophy as the synecdoche does within language, pointing the sense of the general into the particular and/or viceversa. The many affinities and similarities between different sign systems, like those found across the interrelationships of the arts, are embedded into a transversal, synecdochic intersemiosis. An important question, from this view, is whether Ingardean’s pure objectivities lie basically on the impossibility of translation, therefore being absolute self-referential constructions. In such a case, it would be impossible to translate pure intentionality into something else, like acts or products.

Faktorer som initierar och påverkar prat i långsiktiga relationer

Den klassiska situationen där konsumentinformationen på ett ensidigt sätt tidigare har levererats av företagen får ge vika för en ny situation där dagens konsument aktivt sprider information för att påverka andra konsumenters köpbeslut genom att prata med andra om köpupplevelser och specifika tjänsteleverantörer t ex genom diskussionsgrupper på Internet. För företagen är situationen kritisk då de håller på att mista sina maktmonopol på informationen. Innehållet i pratet är mycket viktigt för mottagarna av pratet eftersom de flesta kunder om de inte själva har upplevt företaget, skapar sina åsikter och förväntningar om företaget samt om dess varor och tjänster på basen av vad andra berättar om saken. Man kan då säga att pratet har fått en viktigare roll vid formandet av konsumtionsbeslutet. Syftet med denna studie är att skapa förståelse för vilka faktorer som initierar och påverkar prat hos kunder i långsiktiga relationer. På basis av de olika resultaten konstruerades en modell som förklarar sambandet mellan faktorerna. Modellens första del visar att prat initieras på basis av långvariga upplevelser i relationer mellan tjänsteleverantör och kund. Modellens andra del visar att pratet påverkas av kundens personliga karaktäristika och relationsrelaterade faktorer som upplevt engagemang i tjänstekategorin och i tjänsteleverantören samt i relationslängden. Modellens tredje del visar att kundernas prat varierar i aktivitet och omfång beroende på valensen av upplevelserna och beroende på om prataren har starka eller svaga band till pratmottagaren. Det är viktigt och mycket aktuellt att öka förståelsen för kunders kommunikationsbeteende ur ett relationsperspektiv. Ur företagsledningssynvinkel är det viktigt att förstå hur kunders prat påverkar utvecklingen av verksamhetsmiljön. Ur praktiskt tillämpningsperspektiv kan en ökad kunskap om pratet vidare hjälpa företaget att fokusera på vad kunderna anser vara viktigt i en relation. Genom att veta vad kunderna pratar om kan företaget förbättra svagheter i verksamheten, och därigenom minska på andelen negativt prat eller uppmuntra kunder att prata om fördelar som relationen med företaget ger åt kunden.

Narrative, Memory and the Crisis of Mimesis: the Case of Adam Elsheimer and Giordano Bruno

The triangular space between memory, narrative and pictorial representation is the terrain on which this article is developed. Taking the art of memory developed by Giordano Bruno (1548 – 1600) and the art of painting subtly revolutionised by Adam Elsheimer (1578 – 1610) as test-cases, it is shown how both subvert the norms of mimesis and narration prevalent throughout the Renaissance, how disrupted memory creates “incoherent” narratives, and how perspective and the notion of “place” are questioned in a corollary way. Two paintings by Elsheimer are analysed and shown to include, in spite of their supposed “realism”, numerous incoherencies, aporias and strange elements – often overlooked. Thus, they do not conform to two of the basic rules governing both the classical art of memory and the humanist art of painting: well-defined places and the exhaustive translatability of words into images (and vice-versa). In the work of Bruno, both his philosophical claims and the literary devices he uses are analysed as hints for a similar (and contemporaneous) undermining of conventions about the transparency and immediacy of representation.

Hyveiden harjoittaminen : edellytykset ja esteet

In the first half of the 20th century, most moral philosophers took the concept of virtue to be secondary to moral principles or emotions, though in various and mutually conflicting ways. In the early 1960s interest in the virtues was restored by the analytic philosophers Elizabeth Anscombe and Georg Henrik von Wright, the younger colleagues and friends of the late Wittgenstein. Later, Alasdair MacIntyre became a leading virtue ethicist. In 1981, MacIntyre introduced in After Virtue the concept of practices, which he based on the Aristotelian distinction between praxis and poiesis. This dissertation examines MacIntyre s characterization of the interconnectedness between practices and virtues, especially in relation to skills, education, and certain emotions. The primary position of the virtues is defended against the tendency in modern moral philosophy to overemphasize the role either of principles and rules or of emotions. The view according to which rational action and acting according to the virtues is best conceptualized as following rules or principles is criticized by arguments that are grounded by some Wittgensteinian observations, and that can be characterized as transcendental. Even if the virtues cannot be defined by, and are not based entirely on, emotions, the role of certain emotions on the learning and education of skills and virtues are studied more carefully than by MacIntyre. In the cases of resentment, indignation, and shame, the analysis of Peter Strawson is utilized, and in the case of regret, the analysis of Bernard Williams. Williams analysis of regret and moral conflict concludes in a kind of antirealism, which this study criticizes. Where education of practices and skills and the related reactive emotions are examined as conditions of learning and practicing the virtues, institutions and ideologies are examined as obstacles and threats to the virtues. This theme is studied through Karl Marx s conception of alienation and Karl Polanyi s historical and sociological research concerning the great transformation . The study includes six Finnish-published articles carrying the titles Our negative attitudes towards other persons , Authority and upbringing , Moral conflicts, regret and ethical realism , Practices and institutions , Doing justice as condition to communal action: a transcendental argument for justice as virtue , and Alienation from practices in capitalist society: Alasdair MacIntyre s Marxist Aristotelianism . The introductory essay sums up the themes of the articles and presents some central issues of virtue ethics by relating the classical Socratic questions to Aristotelian practical philosophy, as well as to current controversies in metaethics and moral psychology.

Medieberättelser om den politiska retoriken om invandring - Hur konstrueras vår bild av invandring genom nyhetsrapportering?

I min pro gradu-avhandling undersöker jag hur media bidrar till att konstruera bilden av invandring till Finland. Mitt material består av tre nationella tidningar, varav Helsingin Sanomat och Huvudstadsbladet representerar dagstidningar och Iltalehti kvällspressen. Bakgrunden för undersökningen är en tre månaders period under vintern 2008-2009, då invandring låg högt på den politiska agendan. Under denna period skärptes den politiska retoriken mot invandring. Detta tillskrivs främst sannfinländarnas valframgång i kommunalvalet hösten 2008. Materialet består av s.k. hårda nyheter om invandring från tidningarnas inrikessidor samt åsiktsjournalistik i form av ledare och kolumner. Tidigare forskning i medierapportering om invandring och den finländska politiska debatten om invandring utgör den teoretiska bakgrunden för avhandlingen. Långvariga kartläggningsprojekt av medierapporteringen om invandring har utförts av Centret för forskning om etniska relationer och nationalism, gällande finlandssvenska tidningar (se Haavisto 2007) och av Journalismin tutkimuskeskus, gällande finskspråkiga tidningar (se Raittila & Vehmas 2005). Dessa utgör bakgrundskunskap som jag bygger vidare på. Andra viktiga källor är Kaarina Horstis (2005) avhandling, som handlar om medierapporteringen om asylsökande och mångkulturalism och Outi Lepolas (2008) avhandling gällande riksdagsdebatter om invandring och mångkulturalism på 1990-talet. I analysen använder jag kritisk diskursanalys, men tar inslag ur ramanalys och retorikanalys. Ett centralt begrepp i min avhandling är nyhetsgenre och jag undersöker hur nyhetens konventioner påverkar sättet på vilket frågor om invandring presenteras. Media bygger upp olika tolkningar av den sociala verkligheten genom att beskriva berättelser. Jag analyserar rapporteringen av den politiska debatten ur detta perspektiv och ser på vilka talarpositioner ges åt de olika politiska aktörerna i debatten. I rapporteringen om invandrargruppers ankomst till Finland var en krisinramning dominerande. Genom negativa metaforer konstrueras invandring som ett hot mot det finska samhället. Frågan om asylsökande, framom andra invandrargrupper, får mycket utrymme i tidningarna och bidrar till att rama in diskussionen om invandring i stort. I rapporteringen om den politiska debatten från perioden förekommer tillspetsad retorik mot invandring också från politiker ur de stora partierna. Genom denna retorik konstruerar man invandring som ett hot. Denna retorik tillhör den invandrarkritiska diskursen. Andra diskurser genom vilka man behandlar invandring i materialet är den arbetsrelaterade diskursen och den mångkulturella diskursen. Argument som stödjer sig mot dessa diskurser är dock mycket färre och hamnar i skymundan av den invandrarkritiska diskursen.

The Home of Hearing : George Lindbeck's understanding of community

The aim of this thesis was to examine the understanding of community in George Lindbeck s The Nature of Doctrine. Intrinsic to this question was also examining how Lindbeck understands the relation between the text and the world which both meet in a Christian community. Thirdly this study also aimed at understanding what the persuasiveness of this understanding depends on. The method applied for this task was systematic analysis. The study was conducted by first providing an orientation into the nontheological substance of the ND which was assumed useful with respect to the aim of this study. The study then went on to explore Lindbeck in his own context of postliberal theology in order to see how the ND was received. It also attempted to provide a picture of how the ND relates to Lindbeck as a theologian. The third chapter was a descriptive analysis into the cultural-linguistic perspective, which is understood as being directly proportional to his understanding of community. The fourth chapter was an analysis into how the cultural-linguistic perspective sees the relation between the text and the world. When religion is understood from a cultural-linguistic perspective, it presents itself as a cultural-linguistic entity, which Lindbeck understands as a comprehensive interpretive scheme which structures human experience and understanding of oneself and the world in which one lives. When one exists in this entity, it is the entity which shapes the subjectivities of all those who are at home in this entity which makes participation in the life of a cultural linguistic entity a condition for understanding it. Religion is above all an external word that moulds and shapes our religious existence and experience. Understanding faith then as coming from hearing, is something that correlates with the cultural-linguistic depiction of reality. Religion informs us of a religious reality, it does not originate in any way from ourselves. This externality linked to the axiomatic nature of religion is also something that distinguishes Lindbeck sharply from liberalist tendencies, which understand religion as ultimately expressing the prereflective depths of the inner self. Language is the central analogy to understanding the medium in which one moves when inhabiting a cultural-linguistic system because language is the transmitting medium in which the cultural-linguistic system is embodied. The realism entailed in Lindbeck s understanding of a community is that we are fundamentally on the receiving end when it comes to our identities whether cultural or religious. We always witness to something. Its persuasiveness rests on the fact that we never exist in an unpersuaded reality. The language of Christ is a self-sustaining and irreducible cultural-linguistic entity, which is ontologically founded upon Christ. It transmits the reality of a new being. The basic relation to the world for a Christian is that of witnessing salvation in Christ: witnessing Christ as the home of hearing the message of salvation, which is the God-willed way. Following this logic, the relation of the world and the text is one of relating to the world from the text, i.e. In Christ through the word (text) for the world, because it assumes it s logic from the way Christ ontologically relates to us.

“And now to the rest of the trash…” Representations of begging Roma and an ideal society in two Nordic newspapers

Since begging East European Roma became a common view in the streets of larger Nordic cities, vivid discussions about their presence and activities have been carried out in the mass media. This thesis examines the public debates in Finland and Norway through a discursive analysis and comparison of press content from the two countries. The aim of the study is firstly to identify the prominent discourses which construct certain images of the beggars, as well as the elements and internal logics that these discourses are constructed around. But in addition to scrutinizing representations of the Roma, also an opposite perspective is applied. In accordance with the theoretical concept of ‘othering’, debates about ‘them’ are assumed to simultaneously reveal something significant about ‘us’. The second research question is thus what kind of images of the ideal Finnish and Norwegian societies are reflected in the data, and which societal values are salient in these images. The analysis comprises 79 texts printed in the main Finnish and Norwegian quality newspapers; Helsingin Sanomat and Aftenposten. The data consists of news articles, editorials, columns and letters to the editor from a three-month period in the summer of 2010. The analysis was carried out within the theoretical and methodological framework of critical discourse analysis as outlined by Norman Fairclough. A customized nine-step coding scheme was developed in order to reach the most central dimensions of the texts. Seven main discourses were identified; the Deprivation-solidarity, Human rights, Order, Crime, Space and majority reactions, Authority control, and Authority critique discourse. These were grouped into two competing normative stances on what an ideal society looks like; the exclusionary and the inclusionary stance. While the exclusionary stance places the begging Roma within a frame of crime, illegitimate use of public space and threat to the social order, the other advocates an attitude of solidarity and humanitarian values. The analysis points to a dominance of the former, although it is challenged by the latter. The Roma are “individualized” by quoting and/or presenting them by name in a fair part of the Finnish news articles. In Norway, the opposite is true; there the beggars are dominantly presented as anonymous and passive. Overall, the begging Roma are subjected to a double bind as they are faced with simultaneous expectations of activity and passivity. Theories relating to moral panics and ‘the good enemy’ provide for a deepened understanding of the intensity of the debates. Keywords: East European Roma, begging, media, newspapers, Helsingin Sanomat, Aftenposten, critical discourse analysis, Norman Fairclough, othering, ideal society, moral panics, good enemy, double bind, Finland, Norway

Preparation and characterization chemistry of nano-crystalline Ni-Cu-Zn ferrite

In submitted research; nanocrystalline powders having elements Ni0.5Cu0.25Zn0.25Fe2 xInxO4 with varied amounts of indium ( x = 0.0, 0.1, 0.2, 0.3 and 0.4) were grown-up by modified citrate to nitrate alchemy. The realism of single phase cubic spinel creation of the synthesized ferrite samples was studied by the DTA-TGA, XRD, SEM, EDX, FT-IR, VSM and dielectric measurements. SEM was applied to inspect the morphological variations and EDX was used to determine the compositional mass ratios. The studies on the dielectric constant (epsilon'), dielectric loss (epsilon `'), loss tangent (tan delta), ac conductivity (sigma(ac)), resistive and reactive parts of the impedance analysis (Z' and Z `') at room temperature were also carried out. The saturation magnetizations (Ms) were determined using the vibrating sample magnetometer (VSM). Ms. decreased with the increase In3+ doping content, as Fe3+ of 5(mu B) ions are replaced by In3+ of 5 mu(B) ions. (C) 2012 Elsevier B. V. All rights reserved.

Hydrodynamics of soft active matter

This review summarizes theoretical progress in the field of active matter, placing it in the context of recent experiments. This approach offers a unified framework for the mechanical and statistical properties of living matter: biofilaments and molecular motors in vitro or in vivo, collections of motile microorganisms, animal flocks, and chemical or mechanical imitations. A major goal of this review is to integrate several approaches proposed in the literature, from semimicroscopic to phenomenological. In particular, first considered are ``dry'' systems, defined as those where momentum is not conserved due to friction with a substrate or an embedding porous medium. The differences and similarities between two types of orientationally ordered states, the nematic and the polar, are clarified. Next, the active hydrodynamics of suspensions or ``wet'' systems is discussed and the relation with and difference from the dry case, as well as various large-scale instabilities of these nonequilibrium states of matter, are highlighted. Further highlighted are various large-scale instabilities of these nonequilibrium states of matter. Various semimicroscopic derivations of the continuum theory are discussed and connected, highlighting the unifying and generic nature of the continuum model. Throughout the review, the experimental relevance of these theories for describing bacterial swarms and suspensions, the cytoskeleton of living cells, and vibrated granular material is discussed. Promising extensions toward greater realism in specific contexts from cell biology to animal behavior are suggested, and remarks are given on some exotic active-matter analogs. Last, the outlook for a quantitative understanding of active matter, through the interplay of detailed theory with controlled experiments on simplified systems, with living or artificial constituents, is summarized.

El tema del tiempo en la "Expositio in physicam" de Walter Burley

Resumen: El trabajo permite reconstruir el itinerario de la reacción inmediata del ultra realismo de Walter Burley frente a la crítica nominalista, tomando base en la teoría física y particularmente, en el tema del tiempo. Entendemos que el análisis comparativo de las doctrinas de Burley y de Ockham permitirá arrojar cierta luz sobre la historia de los primeros e importantes enfrentamientos al ockhamismo, procurando conformar una intelección nueva del siglo XIV donde Burley pasaría a ser un personaje de interés al motivar la reflexión de una figura como la de Ockham. Centramos nuestro análisis en torno a dos tópicos: aquel vinculado con la determinación del concepto de tiempo y su distinción del movimiento; y en segundo término, consideraremos el problema de la unicidad o pluralidad de tiempos. El trabajo propone tentativamente que ambos autores conocieron mutuamente sus doctrinas, se leyeron y corrigieron recíprocamente; y las profundas diferencias que conforman sus sistemas deben buscarse en una fundamentación gnoseo-ontológica diversa.

El derecho entre ciencia y jurisprudencia

Resumen: El autor introduce su trabajo con una serie de precisiones semánticas acerca de los conceptos principales que definen el objeto de su indagación: derecho, ciencia y jurisprudencia. Critica la noción de ciencia aplicada al derecho, y la aspiración a la certeza que ella conlleva y que pretende ser realizada por el positivismo y la ideología política de la soberanía según el modelo moderno y de la Revolución Francesa. Y pone de manifiesto las contradicciones en las que incurren las diversas corrientes positivistas. En el núcleo teórico de la investigación, contrapone convencionalismo y realismo, para pasar luego a analizar las concepciones modernas y contemporáneas de jurisprudencia y la concepción de Francesco Gentile acerca de lo que él denomina “geometría legal”. La conclusión pretende mostrar que los errores de perspectiva acerca del derecho y la jurisprudencia terminan necesariamente en la desnaturalización del derecho y, en definitiva, en la injusticia.

Alcance y límites de la potencia humana

Resumen: La visión sobre el modo de ser del hombre condiciona, de un modo u otro, su actuar en el mundo. En general, es éste un punto de partida compartido por las distintas corrientes filosóficas al momento de dar respuesta al ejercicio del potencial humano, si bien pueden distanciarse drásticamente al sustentar el pasaje ser-obrar. En este sentido, entre las formas más alejadas entre sí cabe reparar, por una parte, en una concepción que recurre a la justificación de una metafísica realista que reconoce la dialéctica de la participación y, por otra, en una concepción que se declara anti-metafísica al disolver el ser en su negación, en la nada, para exaltar la voluntad de poder del hombre. Si bien este trabajo se desarrollará en el marco de la primera concepción, desde el estudio de la causación del acto de ser en Tomás de Aquino, habré de recurrir a la segunda concepción, en particular al nihilismo nietzscheano, solamente como planteo del estado de la cuestión, buscando remover críticamente una objeción recurrente en la historia del pensamiento sobre el alcance y límites de la operación humana.

Una zoología monstruosa: los leones del Palmerín de Olivia

Resumen: A simple vista, la zoología monstruosa podría verse como una fauna de carácter real, en oposición a otros seres que evidencian su monstruosidad. Sin embargo, bajo ese manto aparente de realismo, se esconde el principio mágico que ha movido a esos animales a un desplazamiento de la más pura realidad a la otredad monstruosa, sea a causa de la metamorfosis, de las profecías o de cualquier otro elemento que no se corresponda directamente con su naturaleza animal, sino que provenga de un principio exterior —la magia— o interior —su propia naturaleza monstruosa/prodigiosa—. Es el caso de los leones del Palmerín de Olivia (Salamanca, Juan de Porras, 1511), que debe enfrentar el héroe en tierras de moros

Una teoría general para la enseñanza del derecho civil : una propuesta para el Bicentenario

Resumen: El presente trabajo propone elementos para una reformulación de la enseñanza del Derecho Civil en la Argentina del Bicentenario. Parte del análisis del estado actual de la enseñanza en esta rama jurídica, con especial referencia a sus etapas históricas. Considera luego lo que se denomina “el modelo del cententario”, con particular atención a la influencia de la modernidad ilustrada y la cultura del Código. Evalúa luego la cuestión a partir de la tensión entre modernidad ilustrada y posmodernidad, proponiendo una alternativa al modelo de enseñanza surgido de la posmodernidad. Como hipótesis de trabajo propone una lectura de la denominada cultura jurídica desde los principios del derecho, y aportar así una alternativa desde la perspectiva del realismo jurídico clásico.