Untangling and smoothing of quadrilateral and hexahedral meshes

[EN]In this paper, we extend a simultaneous untangling and smoothing technique previously developed for triangular and tetrahedral meshes to quadrilateral and hexahedral ones. Specifically, we present a technique that iteratively untangles and smooths a given quadrilateral or hexahedral mesh by minimizing an objective function defined in terms of a modification of an algebraic quality measure. The proposed method optimizes the mesh quality by a local node relocation process. That is, without modifying the mesh connectivity. Finally, we present several examples to show that the proposed technique obtains valid meshes composed by high-quality quadrilaterals and hexahedra, even when we start from tangled meshes…

Detection and localization of GLUTs in spermatozoa from different domestic species

Sperm cells need hexoses as a substrate for their function, for both the maintenance of membrane homeostasis and the movement of the tail. These cells have a peculiar metabolism that has not yet been fully understood, but it is clear that they obtain energy from hexoses through glycolisis and/or oxidative phosphorylation. Spermatozoa are in contact with different external environments, beginning from the testicular and epididymal fluid, passing to the seminal plasma and finally to the female genital tract fluids; in addition, with the spread of reproductive biotechnologies, sperm cells are diluted and stored in various media, containing different energetic substrates. To utilize these energetic sources, sperm cells, as other eukaryotic cells, have a well-constructed protein system, that is mainly represented by the GLUT family proteins. These transporters have a membrane-spanning α-helix structure and work as an enzymatic pump that permit a fast gradient dependent passage of sugar molecules through the lipidic bilayer of sperm membrane. Many GLUTs have been studied in man, bull and rat spermatozoa; the presence of some GLUTs has been also demonstrated in boar and dog spermatozoa. The aims of the present study were - to determine the presence of GLUTs 1, 2, 3, 4 and 5 in boar, horse, dog and donkey spermatozoa and to describe their localization; - to study eventual changes in GLUTs location after capacitation and acrosome reaction in boar, stallion and dog spermatozoa; - to determine possible changes in GLUTs localization after capacitation induced by insulin and IGF stimulation in boar spermatozoa; - to evaluate changes in GLUTs localization after flow-cytometric sex sorting in boar sperm cells. GLUTs 1, 2, 3 and 5 presence and localization have been demonstrated in boar, stallion, dog and donkey spermatozoa by western blotting and immunofluorescence analysis; a relocation in GLUTs after capacitation has been observed only in dog sperm cells, while no changes have been observed in the other species examined. As for boar, the stimulation of the capacitation with insulin and IGF didn’t cause any change in GLUTs localization, as well as for the flow cytometric sorting procedure. In conclusion, this study confirms the presence of GLUTs 1, 2 ,3 and 5 in boar, dog, stallion and donkey spermatozoa, while GLUT 4 seems to be absent, as a confirmation of other studies. Only in dog sperm cells capacitating conditions induce a change in GLUTs distribution, even if the physiological role of these changes should be deepened.

Zum Transport von partikelgebundenen Schadstoffen in der ungesättigten Zone

Bei einer Risikoabschätzung bezüglich einer Gefährdung des Schutzgutes Grundwasser müssen alle relevanten Transportpfade, auf denen Schadstoffe durch die Bodenzone bis ins Grundwasser verlagert werden, identifiziert und quantifiziert werden. Die Verlagerung von Schadstoffen gebunden an mobile Partikel im Sickerwasser wird dabei oft vernachlässigt. In dieser Arbeit wurden sowohl experimentelle Untersuchungen zum Partikeltransport in der Bodenzone als auch Szenarienmodellierungen hinsichtlich der Wechselwirkung Partikel/Schadstoff durchgeführt. Die experimentellen ungesättigten Säulenversuche wurden unter naturnahen stationären und instationären hydraulischen und hydrochemischen Bedingungen durchgeführt. Dabei wurde der Einfluss der Parameter Durchmesser Bodenmatrix, Partikelgröße, Beregnungsintensität, Oberflächenspannung und Hydrochemie auf den Transport von natürlichen und synthetischen Partikeln untersucht. Des Weiteren wurden Untersuchungen zur partikelgebundenen Verlagerung von Phenanthren durchgeführt. In einer numerischen Szenarienmodellierung mit dem Modell SMART wurde untersucht, unter welchen Randbedingungen der Transport von Partikeln gleichzeitig zu signifikanten partikelgebundenen Schadstoffkonzentrationen im Grundwasser führt. Dabei wurden die Parameter Lithologie Partikel/Boden, Hydrophobizität Schadstoff, Partikelkonzentration, Partikeldurchmesser sowie Körnung Bodenmatrix variiert. Die Ergebnisse dieser Arbeit zeigen, dass der partikelgebundene Schadstofftransportpfad in der ungesättigten Bodenzone in verschiedenen Szenarien den Anteil mobiler Schadstoffe, die mit dem Sickerwasser ins Grundwasser gelangen, signifikant erhöht. Auf Basis der experimentellen und theoretischen Untersuchungen wurde ein zweistufiges Bewertungsschema entwickelt, das bereits im Vorfeld einer Risikoabschätzung als Entscheidungshilfe hinsichtlich der Relevanz einer Mobilisierung, eines Transports und des Rückhalts von partikelgebundenen Schadstoffen in der ungesättigten Zone dient.

Controlled foreign companies (CFC) e delocalizzazione delle attività economiche nel diritto interno e nell'ordinamento europeo

Le ragioni della delocalizzazione sono molteplici e di differente natura. Si delocalizza, in primo luogo, per ragioni di stampo economico, finanziario eccetera, ma questa spinta naturale alla delocalizzazione è controbilanciata, sul piano strettamente tributario, dall’esigenza di preservare il gettito e da quella di controllare la genuinità della delocalizzazione medesima. E’ dunque sul rapporto tra “spinte delocalizzative” dell’impresa, da un lato, ed esigenze “conservative” del gettito pubblico, dall’altro, che si intende incentrare il presente lavoro. Ciò alla luce del fatto che gli strumenti messi in campo dallo Stato al fine di contrastare la delocalizzazione (più o meno) artificiosa delle attività economiche devono fare i conti con i principi comunitari introdotti con il Trattato di Roma e tratteggiati negli anni dalla giurisprudenza della Corte di Giustizia. In quest’ottica, la disciplina delle CFC costituisce un ottimo punto di partenza per guardare ai fenomeni di produzione transnazionale della ricchezza e agli schemi di ordine normativo preposti alla tassazione di codesta ricchezza. Ed infatti, le norme sulle CFC non fanno altro che omogeneizzare un sistema che, altrimenti, sarebbe lasciato alla libera iniziativa degli uffici fiscali. Tale “normalizzazione”, peraltro, giustifica le esigenze di apertura che sono incanalate nella disciplina degli interpelli disapplicativi. Con specifico riferimento alla normativa CFC, assumono particolare rilievo la libertà di stabilimento ed il principio di proporzionalità anche nella prospettiva del divieto di abuso del diritto. L’analisi dunque verterà sulla normativa CFC italiana con l’intento di comprendere se codesta normativa, nelle sue diverse sfaccettature, possa determinare situazioni di contrasto con i principi comunitari. Ciò anche alla luce delle recenti modifiche introdotte dal legislatore con il d.l. 78/2009 in un quadro normativo sempre più orientato a combattere le delocalizzazioni meramente fittizie.

Der Wirkungsmechanismus von Neurosteroiden auf das Cytoskelett neuronaler Zellen

Neurosteroide können langsame genomische und schnelle nicht-genomische Effekte zeigen. Die Synthese und der Metabolismus von Neurosteroiden werden entwicklungsbedingt reguliert. In den letzten Jahren sind immer mehr schnelle Steroideffekte bekannt geworden, die sowohl über klassische als auch über nicht-klassische Rezeptoren laufen. Zum heutigen Stand der Forschung sind die morphologischen Effekte von Neurosteroiden auf das neuronale Cytoskelett und die involvierten Signalkaskaden noch weitgehend unerforscht. In diesem Zusammenhang stellen sich auch die Fragen nach den verantwortlichen Rezeptoren und dem Transportmechanismus sowie der subzellulären Lokalisation der Steroide. Die im Rahmen meiner Promotion erhaltenen Ergebnisse zeigen, dass die Steroide DHEA und Testosteron eine Reorganisation des Aktincytoskeletts in neuronalen Zellen induzieren und dass diese Effekte diesen Steroiden und nicht ihren Folgemetaboliten zuzuordnen sind. DHEA bewirkt die Kontraktion der Zellen, eine erhöhte Ausbildung von Stressfasern und fokalen Adhäsionskomplexen sowie die Bildung von Filopodien. Der diesen Effekten zu Grunde liegende Signalweg konnte eindeutig identifiziert werden. DHEA induziert in neuronalen Zellen die Aktivierung des Rho-Signalwegs. Diese Aktivierung führt zu einem erhöhten Phosphorylierungsstatus der regulatorischen leichten Kette von Myosin II (MRLC) an Serin 19 und der damit verbundenen erhöhten Myosin-Aktin-Interaktion. Die Ausbildung von Filopodien wird vermutlich über eine Aktivierung der GTPase Cdc42 vermittelt. Testosteron induziert das Auswachsen langer Neuriten sowie eine Verminderung von Stressfasern in neuronalen Zellen. Diese Effekte sind abhängig von der Aktivität der PI3-Kinase. Die im Rahmen dieser Arbeit gewonnenen Erkenntnisse deuten darauf hin, dass Testosteron über die PI3-Kinase und FAK den Rac-Signalweg induziert, da es zu einer Inhibierung des Rho-Signalwegs kommt. Zahlreiche Erkenntnisse weisen darauf hin, dass DHEA und Testosteron die Aktivierung der beteiligten Signalwege über einen G-Protein gekoppelten Rezeptor induzieren. DHEA und Testosteron beeinflussen auch die Expression und die Lokalisation der regulatorischen leichten Ketten von Myosin II. Im Gegensatz zu DHEA (Lokalisation der MRLC in der kortikalen Region der Zelle), induziert Testosteron eine Umlokalisation der MRLC in den Zellkern. Daher ist es denkbar, dass die MRLCs, wie auch Aktin, als Transkriptionsfaktoren wirken können. Die Synthese eines funktionalen, fluoreszierenden DHEA-Derivats (DHEA-Bodipy) ermöglichte erstmals, den Transport und die subzelluläre Lokalisation von DHEA in neuronalen Zellen zu beobachten. DHEA-Bodipy wird in neuronalen Zellen in den Mitochondrien lokalisiert. Diese Lokalisation ergibt völlig neue Ansätze im Verständnis zellulärer Wirkungsorte von Steroiden und beteiligter Rezeptoren. Das in meiner Arbeit vorgestellte Verfahren zur Fluoreszenzmarkierung von Steroiden bietet vielfältige Möglichkeiten im Einsatz zellbiologischer Methoden. Nach diesem Verfahren hergestellte, fluoreszierende Steroide eignen sich aufgrund ihrer Stabilität sehr gut für die Untersuchung des Transports und der subzellulären Lokalisation von Steroiden an fixierten und lebenden Zellen sowie für Colokalisationsexperimente. Diese Methode grenzt somit auch die Anzahl möglicher molekularer Interaktionspartner ein. Für Testosteron konnte ebenfalls ein fluoreszierendes Testosteron-Derivat (Testosteron-Bodipy) synthetisiert werden. Die Aufklärung der Effekte von Steroiden auf das neuronale Cytoskelett und der beteiligten Signalkaskaden sowie die Identifizierung der zellulären Wirkungsorte ermöglichen therapeutische Ansätze zur Behandlung neurodegenerativer Erkrankungen, deren Ursachen in Abnormitäten des Cytoskeletts oder fehlregulierter Neurosteroidogenese zu begründen sind.

"A la búsqueda de nuevos horizontes". La scrittura della migrazione africana in Spagna

La migrazione genera spesso nei soggetti migranti forme di spaesamento, poiché lo spostamento fisico condiziona la sfera emotiva: in loro può emergere il senso di nostalgia verso la patria e il desiderio del ritorno, oppure la volontà di annullare le proprie radici e di conformarsi ai modelli della società ricevente. Spesso tali sensazioni di spaesamento possono essere superate grazie alla pratica creativa della scrittura; è per questo che nelle varie realtà di immigrazione ha preso campo la pratica della scrittura migrante, dove si dà spazio all’altro che cerca di far sentire la propria voce, ricorrendo alla lingua del Paese d’arrivo, senza rinunciare ai tratti distintivi della sfera culturale d’origine, creando testi ibridi, che disegnano un ponte tra le culture. Focus della ricerca è la scrittura della migrazione africana in Spagna, studiata sia in prospettiva generale che specifica, mediante quattro autori e le relative opere selezionate: Laila (2010) della marocchina Laila Karrouch, Las tres vírgenes de Santo Tomás (2008) dell’equatoguineana Guillermina Mekuy, Una vida de cuento (2006) del camerunese Boniface Ofogo, Amina (2006) del senegalese Sidi Seck. L’analisi dei testi è effettuata sulla base di due filoni tematici, la famiglia e il rapporto con la società d’arrivo, ed è corredata dallo studio del lessico relativo ai due temi di riferimento. Leggere fra le righe il microcosmo della famiglia significa porre l’attenzione sulle diverse dinamiche affettive che stanno dietro alla parola “migrazione” e sulle particolari dimensioni familiari che caratterizzano la vita odierna, dove spesso avviene il contatto fra più culture. Un contatto che si riflette nel macrocontesto della realtà ospite dove si ha modo di avviare un dialogo fra nativi e stranieri, poiché spesso le iniziali forme di contrasto si tramutano in sete di conoscenza e volontà di avvicinarsi, facendo emergere l’idea che la diversità non separa ma arricchisce.

L'autotrasporto di cose per conto di terzi: Profili tariffari e prospettive di sviluppo

Il presente elaborato concerne le problematiche giuridiche connesse alla regolamentazione del settore dell’autotrasporto di cose per conto di terzi in Italia, con particolare attenzione alla disciplina dei profili tariffari ed alle dinamiche consolidatesi nella prassi in relazione alle pratiche di dumping sociale, outsourcing e delocalizzazione. Nella prima parte, dopo una premessa finalizzata a descrivere le caratteristiche strutturali dei fornitori di servizi di autotrasporto in ambito nazionale e comunitario nonchè le principali peculiarità del mercato di riferimento, viene descritta ed analizzata l’evoluzione normativa e giurisprudenziale verificatasi con riguardo ai profili tariffari dell’autotrasporto, esaminando in particolare le caratteristiche ed i profili di criticità propri delle discipline in materia di “tariffe a forcella” di cui alla L. n. 298/1974 e di “costi minimi di sicurezza” di cui all’art. 83-bis del D.L. n. 112/2008, fino a giungere all’analisi degli scenari conseguenti alla recente riforma del settore apportata dalla Legge di Stabilità 2015 (L. 23/12/2014, n. 190). Nella seconda parte, vengono esaminate alcune tematiche problematiche che interessano il settore, sia a livello nazionale che comunitario, e che risultano strettamente connesse ai sopra menzionati profili tariffari. In particolare, si fa riferimento alle fattispecie del cabotaggio stradale, del distacco transazionale di lavoratori e dell’abuso della libertà di stabilimento in ambito comunitario concretantesi nella fattispecie della esterovestizione. Tali problematiche sono state analizzate dapprima attraverso la ricostruzione del quadro normativo nazionale e comunitario di riferimento; in secondo luogo, attraverso l’esame dei profili critici emersi alla luce delle dinamiche di mercato invalse nel settore e, infine, in relazione all’analisi dello scenario futuro desumibile dalle iniziative legislative ed amministrative in atto, nonché dagli indirizzi interpretativi affermatisi in ambito giurisprudenziale.

The implementation of DRG-based hospital reimbursement in Switzerland: A population-based perspective

Background Switzerland introduces a DRG (Diagnosis Related Groups) based system for hospital financing in 2012 in order to increase efficiency and transparency of Swiss health care. DRG-based hospital reimbursement is not simultaneously realized in all Swiss cantons and several cantons already implemented DRG-based financing irrespective of the national agenda, a setting that provides an opportunity to compare the situation in different cantons. Effects of introducing DRGs anticipated for providers and insurers are relatively well known but it remains less clear what effects DRGs will have on served populations. The objective of the study is therefore to analyze differences of volume and major quality indicators of care between areas with or without DRG-based hospital reimbursement from a population based perspective. Methods Small area analysis of all hospitalizations in acute care hospitals and of all consultations reimbursed by mandatory basic health insurance for physicians in own practice during 2003-2007. Results The results show fewer hospitalizations and a relocation of resources to outpatient care in areas with DRG reimbursement. Overall burden of disease expressed as per capita DRG cost weights was almost identical between the two types of hospital reimbursement and no distinct temporal differences were detected in this respect. But the results show considerably higher 90-day rehospitalization rates in DRG areas. Conclusion The study provides evidence of both desired and harmful effects related to the implementation of DRGs. Systematic monitoring of outcomes and quality of care are therefore essential elements to maintain in the Swiss health system after DRG's are implemented on a nationwide basis in 2012.

Using Context Information to Re-architect a System

Successful software systems cope with complexity by organizing classes into packages. However, a particular organization may be neither straightforward nor obvious for a given developer. As a consequence, classes can be misplaced, leading to duplicated code and ripple effects with minor changes effecting multiple packages. We claim that contextual information is the key to rearchitecture a system. Exploiting contextual information, we propose a technique to detect misplaced classes by analyzing how client packages access the classes of a given provider package. We define locality as a measure of the degree to which classes reused by common clients appear in the same package. We then use locality to guide a simulated annealing algorithm to obtain optimal placements of classes in packages. The result is the identification of classes that are candidates for relocation. We apply the technique to three applications and validate the usefulness of our approach via developer interviews.

Translocation of GPIb and Fc receptor gamma-chain to cytoskeleton in mucetin-activated platelets

Recent studies have implied that GPIb-IX-V as well as functioning as an adhesion receptor may also induce signaling to mediate binding of platelets to damaged vessel wall to prevent bleeding. Reorganization of the cytoskeleton and redistribution of platelet structural proteins and signaling molecules are thought to be important in this early activation process, though the molecular mechanisms remain to be fully defined. In this study, we have used mucetin, a snake venom lectin protein that activates platelets via GPIb, to study the redistribution of GPIb in platelets. In unstimulated platelets, a minor portion of GPIb localized to Triton-insoluble cytoskeleton fractions (TIC). This portion increased considerably after platelet activation by mucetin. We also find increased contents of the FcRgamma chain in TIC. Anti-GPIb antibodies, mocarhagin or cytochalasin D completely inhibited the cytoskeletal translocation. In addition, BAPTA-AM, a cytoplasmic calcium chelator, strongly inhibited this process. On the other hand, inhibitors of alphaIIbbeta3, PLCgamma, PKC, tyrosine kinases, ADP receptor, PI3-kinase or EDTA are effective in preventing GPIb relocation in convulxin- but not in mucetin-activated platelets. We propose that cytoskeletal translocation of GPIb is upstream of alphaIIbbeta3 activation and cross-linking of GPIb is sufficient to induce this event in mucetin-activated platelets.

Interrogating the spaces of personal photography : women, identity, and the cultural formation of photographic practice

Personal photographs permeate our lives from the moment we are born as they define who we are within our familial group and local communities. Archived in family albums or framed on living room walls, they continue on after our death as mnemonic artifacts referencing our gendered, raced, and ethnic identities. This dissertation examines salient instances of what women “do” with personal photographs, not only as authors and subjects but also as collectors, archivists, and family and cultural historians. This project seeks to contribute to more productive, complex discourse about how women form relationships and engage with the conventions and practices of personal photography. In the first part of this dissertation I revisit developments in the history of personal photography, including the advertising campaigns of the Kodak and Agfa Girls and the development of albums such as the Stammbuch and its predecessor, the carte-de-visite, that demonstrate how personal photography has functioned as a gendered activity that references family unity, sentimentalism for the past, and self-representation within normative familial and dominant cultural groups, thus suggesting its importance as a cultural practice of identity formation. The second and primary section of the dissertation expands on the critical analyses of Gillian Rose, Patricia Holland, and Nancy Martha West, who propose that personal photography, marketed to and taken on by women, double-exposes their gendered identities. Drawing on work by critics such as Deborah Willis, bell hooks, and Abigail Solomon-Godeau, I examine how the reconfiguration, recontextualization, and relocation of personal photographs in the respective work of Christine Saari, Fern Logan, and Katie Knight interrogates and complicates gendered, raced, and ethnic identities and cultural attitudes about them. In the final section of the dissertation I briefly examine select examples of how emerging digital spaces on the Internet function as a site for personal photography, one that both reinscribes traditional cultural formations while offering new opportunities for women for the display and audiencing of identities outside the family.

Cell shape-dependent early responses of fibroblasts to cyclic strain

Randomly spread fibroblasts on fibronectin-coated elastomeric membranes respond to cyclic strain by a varying degree of focal adhesion assembly and actin reorganization. We speculated that the individual shape of the cells, which is linked to cytoskeletal structure and pre-stress, might tune these integrin-dependent mechanotransduction events. To this aim, fibronectin circles, squares and rectangles of identical surface area (2000μm(2)) were micro-contact printed onto elastomeric substrates. Fibroblasts plated on these patterns occupied the corresponding shapes. Cyclic 10% equibiaxial strain was applied to patterned cells for 30min, and changes in cytoskeleton and cell-matrix adhesions were quantified after fluorescence staining. After strain, megakaryocytic leukemia-1 protein translocated to the nucleus in most cells, indicating efficient RhoA activation independently of cell shape. However, circular and square cells (with radial symmetry) showed a significantly greater increase in the number of actin stress fibers and vinculin-positive focal adhesions after cyclic strain than rectangular (bipolar) cells of identical size. Conversely, cyclic strain induced larger changes in pY397-FAK positive focal complexes and zyxin relocation from focal adhesions to stress fibers in bipolar compared to symmetric cells. Thus, radially symmetric cells responded to cyclic strain with a larger increase in assembly, whereas bipolar cells reacted with more pronounced reorganization of actin stress fibers and matrix contacts. We conclude that integrin-mediated responses to external mechanical strain are differentially modulated in cells that have the same spreading area but different geometries, and do not only depend on mere cell size.

Shaping gender inequalities: critical moments and critical places

Purpose – There is much scientific interest in the connection between the emergence of gender-based inequalities and key biographical transition points of couples in long-term relationships. Little empirical research is available comparing the evolution of a couple’s respective professional careers over space and time. The purpose of this paper is to contribute to filling this gap by addressing the following questions: what are the critical biographical moments when gender (in)equalities within a relationship begin to arise and consolidate? Which biographical decisions precede and follow such critical moments? How does decision making at critical moments impact the opportunities of both relationship partners in gaining equal access to paid employment? Design/methodology/approach – These questions are addressed from the perspectives of intersectionality and economic citizenship. Biographical interviewing is used to collect the personal and professional narratives of Swiss-, bi-national and migrant couples. The case study of a Swiss-Norwegian couple illustrates typical processes by which many skilled migrant women end up absently or precariously employed. Findings – Analysis reveals that the Scandinavian woman’s migration to Switzerland is a primary and critical moment for emerging inequality, which is then reinforced by relocation (to a small town characterized by conservative gender values) and the subsequent births of their children. It is concluded that factors of traditional gender roles, ethnicity and age intersect to create a hierarchical situation which affords the male Swiss partner more weight in terms of decision making and career advancement. Practical implications – The paper’s findings are highly relevant to the formulation of policies regarding gender inequalities and the implementation of preventive programmes within this context. Originality/value – Little empirical research is available comparing the evolution of a couple’s respective professional careers over space and time. The originality of this paper is to fill this research gap; to include migration as a critical moment for gender inequalities; to use an intersectional and geographical perspective that have been given scant attention in the literature; to use the original concept of economic citizenship; and to examine the case of a bi-national couple, which has so far not been examined by the literature on couple relationships.

Do relocated villages experience more forest cover change? Resettlements, shifting cultivation and forests in the Lao PDR

This study explores the relationships between forest cover change and the village resettlement and land planning policies implemented in Laos, which have led to the relocation of remote and dispersed populations into clustered villages with easier access to state services and market facilities. We used the Global Forest Cover Change (2000–2012) and the most recent Lao Agricultural Census (2011) datasets to assess forest cover change in resettled and non-resettled villages throughout the country. We also reviewed a set of six case studies and performed an original case study in two villages of Luang Prabang province with 55 households, inquiring about relocation, land losses and intensification options. Our results show that resettled villages have greater baseline forest cover and total forest loss than most villages in Laos but not significant forest loss relative to that baseline. Resettled villages are consistently associated with forested areas, minority groups, and intermediate accessibility. The case studies highlight that resettlement coupled with land use planning does not necessarily lead to the abandonment of shifting cultivation or affect forest loss but lead to a re-spatialization of land use. This includes clustering of forest clearings, which might lead to fallow shortening and land degradation while limited intensification options exist in the resettled villages. This study provides a contribution to studying relationships between migration, forest cover change, livelihood strategies, land governance and agricultural practices in tropical forest environments.

Las expectativas convivenciales de la desterritorialización global

El proceso de globalización suele pensarse sólo a nivel político y económico, y sobre esta base se lo piensa como homogeneizador y uniformizante. El presente trabajo lo enfoca en su dimensión compleja y multifacética. En consecuencia, nos planteamos la pregunta: En el marco de las redefiniciones de las identidades, ¿cuáles son las posibilidades que ofrece la globalización para la integración y la autoorganización de la sociedad? Postulamos que la desterritorialización es portadora de un futuro con esperanzas convivenciales innumerables porque su capacidad de desplazamiento y de reubicación puede generar una nueva solidaridad que supere las particularidades locales y tenga su fundamento en la humanidad.