Livres sur le sujet « Tree distance »

La II Sezione dell’AIIA ha promosso un’occasione di incontro, confronto e riflessione sul tema “L’edilizia rurale tra sviluppo tecnologico e tutela del territorio” attraverso l’esposizione dei risultati delle più recenti ricerche condotte sull’argomento dai ricercatori del SSD “Costruzioni rurali e territorio agroforestale”. I lavori hanno previsto tre sessioni: nell’ambito della prima sono stati presentati i risultati del PRIN 2008 su “Integrazione di sistemi tecnologici innovativi per il monitoraggio a distanza di animali”, con interventi delle varie Unità Operative coinvolte. Nella seconda e terza sessione sono stati presentati i risultati scientifici di ricerche sui temi dell’Innovazione tecnologica negli edifici agricoli e delle Tendenze nella progettazione di edifici agricoli per un uso sostenibile del territorio.

Esta edición de Bitácoras de la Maestría es una buena muestra de la diversidad de problemas que se pueden resolver con el aporte de la informática. En el primer capítulo se trata tangencialmente un tema sobre el que hay mucha discusión, la industria 4.0, la denominada cuarta revolución industrial, con énfasis en “adaptación”. El tema del segundo capítulo es la seguridad de los dispositivos móviles que funcionan con un sistema operativo Android. El tercer capítulo presenta una solución para un problema de optimización complejo, el Rooted Distance-Constrained Minimum Spanning Tree (RDCMST), muy útil en temas con el diseño de redes de telecomunicaciones.

The world's gliding mammals are an extraordinary group of animals that have the ability to glide from tree to tree with seemingly effortless grace. There are more than 60 species of gliding mammals including the flying squirrels from Asia, Europe and North America, the scaly-tailed flying squirrels from central Africa and the gliding possums of Australia and New Guinea. But the most spectacular of all are the colugos – or so called flying lemurs – that occur throughout South-East Asia and the Philippines. Animals that glide from tree to tree descend at an angle of less than 45 degrees to the horizontal, while those that parachute descend at an angle greater than 45 degrees. Gliding is achieved by deflecting air flowing past well-developed gliding membranes, or patagia, which form an effective airfoil that allows the animal to travel the greatest possible horizontal distance with the least loss in height. The flying squirrels and scaly-tailed flying squirrels even have special cartilaginous spurs that extend either from the wrist or elbow, respectively, to help support the gliding membrane. Gliding Mammals of the World provides, for the first time, a synthesis of all that is known about the biology of these intriguing mammals. It includes a brief description of each species, together with a distribution map and a beautiful full-colour painting. An introduction outlines the origins and biogeography of each group of gliding mammals and examines the incredible adaptations that allow them to launch themselves and glide from tree to tree.

The need for physical distancing during this COVID-19 pandemic has raised the need for innovative campaign methods to be developed by election contestants because conventional campaign methods such as rallies, public meetings, etc. are prohibited in some jurisdictions. Distant and online election campaigning may be seen as restrictive to both contestants and voters alike due to physical and technological barriers that appear. To what degree is this true? Find the answer and more by following the lecture and read the paper.

The network model of temporal structure allows for many generalized concepts of musical time that can be applied across different modalities (rhythmic, tonal, and formal). This chapter defines network depths, distances, paths, centers, skew, and bias, and partially classifies network types such as piles, tortoises, and starfish. A splitting operation on networks is defined and applied to the problem of relating networks in different modalities and finding true disjunctions.

<p><em>Educaciones Físicas escolares. Prácticas, narrativas y (re)producciones</em> es producto de investigaciones en la educación física escolar desde las perspectivas de profesoras, profesores y estudiantes. Su título refleja los puntos de arribo luego de provechosos años de indagación, así como los conceptos que constituyen y definen las formas que toma la educación física en la escuela junto con los desarrollos que la significan.</p><p>Esta producción tensiona a las actoras y los actores que intervienen en las prácticas educativas escolares y al campo de prácticas, lógicas y saberes que significan y validan la educación física escolar, para intentar (re)significarlos en búsqueda de una voz propia, sin despojarse de otras aunque tomando distancia de diálogos y justificaciones tuteladas desde la ajenidad.</p><p>La estructura del libro se apoya en tres formas de desenvolvimiento de la educación física escolar: las prácticas lúdicas, gímnicas y deportivas; las narrativas y, en especial, las (re)producciones como formas de saber e identificación. La lectura permitirá descubrir otras formas y dar lugar a diálogos y explicaciones genuinas y distintivas que no resultarán extrañas ni distantes.</p>

This chapter briefly reviews some the challenges encountered in the search for extraterrestrial life. So far, no signs of extraterrestrial life have been found. The search started with radio telescopes, looking for technology-based civilizations, but new strategies have emerged that take on the primary challenges in this search: the enormous distances to exoplanets and the question of the true nature of life. The author outlines the development of new tools for the search, and why the present focus is on Earth-sized exoplanets with a potential for liquid water on their surfaces. Not having been visited by an alien civilization presents us with a paradox: if life develops as quickly elsewhere as on Earth, then why have we not been contacted? Is the speed of light too slow to cross interstellar distances, is life intrinsically rare, or should we conclude that civilizations are intrinsically short-lived?

Critics have defined sentimentalism as a stylized genre that represents and cultivates sympathy and tears. On Sympathetic Grounds demonstrates that sentimentalists evoked sympathy to express a desire for a place that was territorial and emotional, what Greyser calls an affective geography. Affective geographies describe a sense of intimacy across distance that defies linear cartography. This introduction offers affective geographies as a method for analyzing sentimentalism and its place in the production of space. Whether through true friendship, deep understanding, or the power of sympathy to heal social violence, sentimentalists experienced, and mapped, an array of transcendent connections. These spatial arrangements have enriched conditions for living and have also mercilessly enlisted some bodies and lives as the grounds for others’ well-being.

This chapter considers a number of different ways to develop a semantics in which statements are evaluated at partial possibilities rather than possible worlds. These include the exact version of truth-maker semantics in which truth-makers are wholly relevant to the statements they make true, the inexact version in which they are relevant, but not necessarily wholly relevant, to the statements they make true, and the loose version, in which they need only necessitate the statements they make true, regardless of relevance. The chapter explores the question of how these different semantical schemes are related; and it argues for the surprising conclusion that classical logic can only be properly accommodated within the ‘relevantist’ version of these approaches by allowing possible worlds to be among the partial possibilities. Thus, whatever reasons there might be for adopting such a semantics, they should not include a distaste for possible worlds.

Presented reasearch aimed to develop and analyse the suitability of the CART models for prediction of the extent and probability of occurrence of damage to outer soil layers caused by timber harvesting performed under varied conditions. Having employed these models, the author identified certain methods of logging works and conditions, under which they should be performed to minimise the risk of damaging forest soils. The analyses presented in this work covered the condition of soils upon completion of logging works, which was investigated in 48 stands located in central and south-eastern Poland. In the stands selected for these studies a few felling treatments were carried out, including early thinning, late thinning and final felling. Logging works were performed with use of the most popular technologies in Poland. Trees were cut down with chainsaws and timber was extracted by means of various skidding methods: with horses, semi-suspended skidding with the use of cable yarding systems, farm tractors equipped with cable winches or tractors of a skidder type, and forwarding employing farm tractors with trailers loaded mechanically by cranes or manually. The analyses also included mechanised forest operation with the use of a harvester and a forwarder. The information about the extent of damage to soil, in a form of wheel-ruts and furrows, gathered in the course of soil condition inventory served for construction of regression tree models using the CART method (Classification and Regression Trees), based on which the area, depth and the volume of soil damage under analysis, wheel-ruts and furrows, were determined, and the total degree of all soil disturbances was assessed. The CART classification trees were used for modelling the probability of occurrence of wheel-ruts and furrows, or any other type of soil damage. Qualitative independent variables assumed by the author for developing the models included several characteristics describing the conditions under which the logging works were performed, mensuration data of the stands and the treatments conducted there. These characteristics covered in particular: the season of the year when logging works were performed, the system of timber harvesting employed, the manner of timber skidding, the means engaged in the process of timber harvesting and skidding, habitat type, crown closure, and cutting category. Moreover, the author took into consideration an impact of the quantitative independent variables on the extent and probability of occurrence of soil disturbance. These variables included the following: the measuring row number specifying a distance between the particular soil damage and communication tracks, the age of a stand, the soil moisture content, the intensity of a particular cutting treatment expressed by units of harvested timber volume per one hectare of the stand, and the mean angle of terrain inclination. The CART models developed in these studies not only allowed the author to identify the conditions, under which the soil damage of a given degree is most likely to emerge, or determine the probability of its occurrence, but also, thanks to a graphical presentation of the nature and strength of relationships between the variables employed in the model construction, they facilitated a recognition of rules and relationships between these variables and the area, depth, volume and probability of occurrence of forest soil damage of a particular type. Moreover, the CART trees served for developing the so-called decision-making rules, which are especially useful in organising logging works. These rules allow the organisers of timber harvest to plan the management-related actions and operations with the use of available technical means and under conditions enabling their execution in such manner as to minimise the harm to forest soils. Furthermore, employing the CART trees for modelling soil disturbance made it possible to evaluate particular independent variables in terms of their impact on the values of dependent variables describing the recorded disturbance to outer soil layers. Thanks to this the author was able to identify, amongst the variables used in modelling the properties of soil damage, these particular ones that had the greatest impact on values of these properties, and determine the strength of this impact. Detailed results depended on the form of soil disturbance and the particular characteristics subject to analysis, however the variables with the strongest influence on the extent and probability of occurrence of soil damage, under the conditions encountered in the investigated stands, enclosed the following: the season of the year when logging works were performed, the volume-based cutting intensity of the felling treatments conducted, technical means used for completion of logging works, the soil moisture content during timber harvest, the manner of timber skidding, dragged, semi-suspended or forwarding, and finally a distance between the soil damage and transportation ducts. The CART models proved to be very useful in designing timber harvesting technologies that could minimise the risk of forest soil damage in terms of both, the extent of factual disturbance and the probability of its occurrence. Another valuable advantage of this kind of modelling is an opportunity to evaluate an impact of particular variables on the extent and probability of occurrence of damage to outer soil layers. This allows the investigator to identify, amongst all of the variables describing timber harvesting processes, those crucial ones, from which any optimisation process should start, in order to minimise the negative impact of forest management practices on soil condition.

Urbanity, a notion that originates in the discourses on rhetoric, designates an ethics proper to the city: a witty, distanced behaviour that replaces the authentic person by the playful enactment of a role. This involves - as every theatre - the presence of an illusion; a certain ‘as if’; a deception, yet one that does not deceive anybody. The belief in the illusion becomes interpassively delegated to a kind of virtual, naive observer. Postmodernity, with its obsession with questions of true identity, can be seen as the key enemy of this urban role-play. It thus contributes to the neoliberal privatization and destruction of urban, public space.

This chapter reappraises the connections between narration and argumentation. It contests the claim that narrative is merely a fictional layer superimposed on the nonfictional content (and, by extension, the true essence) of the essay film. The work examined in this chapter explores some of the ways in which narration can give expression to argumentation. The essay form is inherently fragile, with a particular potential for disassemblage. The chapter focuses on epistolarity as a disjunctive narrative form marked by distance and by absence and on the counternarrative aspects of lyricism, based on its tendency to fragmentation, allusiveness, metaphoricity, formalism, and affectivity. Two long-standing traditions are addressed, the epistolary essay via an engagement with Lettres de Panduranga (Letters from Panduranga, 2015) by Nguyễn Trinh Thi and the lyric essay via a study of The Idea of North (1995) by Rebecca Baron.

A new type of illusion, called the antigravity slope illusion, is presented in this chapter. In this illusion a slope orientation is perceived opposite to the true orientation and hence a ball put on it appears to be rolling uphill, defying the law of gravity. This illusion is based on the ambiguity in the distance from a viewpoint to the surface of a three-dimensional solid represented in a single-view image. This illusion also arises in human real life, for example, when a car driver misunderstands the orientation of a road along which he or she is driving. Two assumptions are explored: (a) the human brain prefers to interpret vertical columns in a two-dimensional image as being vertical in three-dimensional space to being slanted and (b) the human brain prefers the most symmetric shape as the interpretation of a two-dimensional image.

Garden cities sought to combine the best of town and country living to provide healthy vibrant communities on a human scale: affordable housing for all classes in tree-lined streets with well-tended gardens, jobs within easy commuting distances, integrated transport, all surrounded by a green belt to prevent urban sprawl. The first examples were built in England in the early years of the twentieth century but the idea soon caught on internationally, with garden cities being planned and built in the USA, Australia, Germany and Japan amongst countries. Alfred Sennett's little known classic work offers one of the most comprehensive accounts of garden cities. Its two volumes cover not only the history and idea of the garden city but are unique in their encycopaedic coverage of the practicalities of the garden city. Among the topics covered are transport, building materials, agriculture, self-cleansing streets, rolling roofs, as well as the sociological aspects. He draws comparisons with cities of the ancient world but also with cities in other countries.

This chapter presents a detailed analysis of children’s practices of sharing earbuds with friends and peers. Portable music technologies mediate face-to-face relationships among schoolchildren, and the social links they support provide an intimate environment for interaction that mostly excludes adults. These face-to-face interactions using digital audio technologies challenge theoretical perspectives from two fields. First, a prominent view of sound technologies as progressively isolating individuals from one another fails entirely to account for children’s sociable practices. Second, while approaches to portable communication technologies increasingly do privilege communication among intimates, in their focus on communication at a distance they neglect the face-to-face connections in which these devices are embedded. Technology studies are also largely unconcerned with portable music listening as “new media,” accepting the view that portable music is isolating. The opposite is true for children, for whom music devices make connections in materially and spatially grounded face-to-face relationships.

In Chapter 1, the Reformation is presented as the paradigmatic site of Gothic escape: the evil monastery can be traced back to Wycliffe’s ‘Cain’s castles’ and the fictional abbey ruin to the Dissolution. Central Gothic tropes are shown to have their origin in this period: the Gothic heroine is compared to the female martyrs of Foxe’s Acts and Monuments; the usurper figure is linked to the papal Antichrist; and the element of continuation and the establishment of the true heir is related to Reformation historiography, which needs to prove that the Protestant Church is in continuity with early Christianity—this crisis of legitimacy is repeated in the Glorious Revolution. Lastly, Gothic uncovering of hypocrisy is allied to the revelation of Catholicism as idolatry. The Faerie Queene is interpreted as a mode of Protestant Gothic and Spenser’s Una provides an allegorical gesture of melancholic distance, which will be rendered productive in later Gothic fiction.

The aim of the paper was to determine the influence of root systems of chosen tree species found in the Polish Flysch Carpathians on the increase of soil shear strength (root cohesion) in terms of slope stability. The paper's goal was achieved through comprehensive tests on root systems of eight relatively common in the Polish Flysch Carpathians tree species. The tests that were carried out included field work, laboratory work and analytical calculations. As part of the field work, the root area ratio (A IA) of the roots was determined using the method of profiling the walls of the trench at a distance of about 1.0 m from the tree trunk. The width of the. trenches was about 1.0 m, and their depth depended on the ground conditions and ranged from 0.6 to 1.0 m below the ground level. After preparing the walls of the trench, the profile was divided into vertical layers with a height of 0.1 m, within which root diameters were measured. Roots with diameters from 1 to 10 mm were taken into consideration in root area ratio calculations in accordance with the generally accepted methodology for this type of tests. These measurements were made in Biegnik (silver fir), Ropica Polska (silver birch, black locust) and Szymbark (silver birch, European beech, European hornbeam, silver fir, sycamore maple, Scots pine, European spruce) located near Gorlice (The Low Beskids) in areas with unplanned forest management. In case of each tested tree species the samples of roots were taken, transported to the laboratory and then saturated with water for at least one day. Before testing the samples were obtained from the water and stretched in a. tensile testing machine in order to determine their tensile strength and flexibility. In general, over 2200 root samples were tested. The results of tests on root area ratio of root systems and their tensile strength were used to determine the value of increase in shear strength of the soils, called root cohesion. To this purpose a classic Wu-Waldron calculation model was used as well as two types of bundle models, the so called static model (Fiber Bundle Model — FIRM, FBM2, FBM3) and the deformation model (Root Bundle Model— RBM1, RBM2, mRBM1) that differ in terms of the assumptions concerning the way the tensile force is distributed to the roots as well as the range of parameters taken into account during calculations. The stability analysis of 8 landslides in forest areas of Cicikowicleie and Wignickie Foothills was a form of verification of relevance of the obtained calculation results. The results of tests on root area ratio in the profile showed that, as expected, the number of roots in the soil profile and their ApIA values are very variable. It was shown that the values of the root area ratio of the tested tree species with a diameter 1-10 ram are a maximum of 0.8% close to the surface of the ground and they decrease along with the depth reaching the values at least one order of magnitude lower than close to the surface at the depth 0.5-1.0 m below the ground level. Average values of the root area ratio within the soil profile were from 0.05 to 0.13% adequately for Scots pine and European beech. The measured values of the root area ratio are relatively low in relation to the values of this parameter given in literature, which is probably connected with great cohesiveness of the soils and the fact that there were a lot of rock fragments in the soil, where the tests were carried out. Calculation results of the Gale-Grigal function indicate that a distribution of roots in the soil profile is similar for the tested species, apart from the silver fir from Bie§nik and European hornbeam. Considering the number of roots, their distribution in the soil profile and the root area ratio it appears that — considering slope stability — the root systems of European beech and black locust are the most optimal, which coincides with tests results given in literature. The results of tensile strength tests showed that the roots of the tested tree species have different tensile strength. The roots of European beech and European hornbeam had high tensile strength, whereas the roots of conifers and silver birch in deciduous trees — low. The analysis of test results also showed that the roots of the studied tree species are characterized by high variability of mechanical properties. The values Of shear strength increase are mainly related to the number and size (diameter) of the roots in the soil profile as well as their tensile strength and pullout resistance, although they can also result from the used calculation method (calculation model). The tests showed that the distribution of roots in the soil and their tensile strength are characterized by large variability, which allows the conclusion that using typical geotechnical calculations, which take into consideration the role of root systems is exposed to a high risk of overestimating their influence on the soil reinforcement. hence, while determining or assuming the increase in shear strength of soil reinforced with roots (root cohesion) for design calculations, a conservative (careful) approach that includes the most unfavourable values of this parameter should be used. Tests showed that the values of shear strength increase of the soil reinforced with roots calculated using Wu-Waldron model in extreme cases are three times higher than the values calculated using bundle models. In general, the most conservative calculation results of the shear strength increase were obtained using deformation bundle models: RBM2 (RBMw) or mRBM1. RBM2 model considers the variability of strength characteristics of soils described by Weibull survival function and in most cases gives the lowest values of the shear strength increase, which usually constitute 50% of the values of shear strength increase determined using classic Wu-Waldron model. Whereas the second model (mRBM1.) considers averaged values of roots strength parameters as well as the possibility that two main mechanism of destruction of a root bundle - rupture and pulling out - can occur at the same. time. The values of shear strength increase calculated using this model were the lowest in case of beech and hornbeam roots, which had high tensile strength. It indicates that in the surface part of the profile (down to 0.2 m below the ground level), primarily in case of deciduous trees, the main mechanism of failure of the root bundle will be pulling out. However, this model requires the knowledge of a much greater number of geometrical parameters of roots and geotechnical parameters of soil, and additionally it is very sensitive to input data. Therefore, it seems practical to use the RBM2 model to assess the influence of roots on the soil shear strength increase, and in order to obtain safe results of calculations in the surface part of the profile, the Weibull shape coefficient equal to 1.0 can be assumed. On the other hand, the Wu-Waldron model can be used for the initial assessment of the shear strength increase of soil reinforced with roots in the situation, where the deformation properties of the root system and its interaction with the soil are not considered, although the values of the shear strength increase calculated using this model should be corrected and reduced by half. Test results indicate that in terms of slope stability the root systems of beech and hornbeam have the most favourable properties - their maximum effect of soil reinforcement in the profile to the depth of 0.5 m does not usually exceed 30 kPa, and to the depth of 1 m - 20 kPa. The root systems of conifers have the least impact on the slope reinforcement, usually increasing the soil shear strength by less than 5 kPa. These values coincide to a large extent with the range of shear strength increase obtained from the direct shear test as well as results of stability analysis given in literature and carried out as part of this work. The analysis of the literature indicates that the methods of measuring tree's root systems as well as their interpretation are very different, which often limits the possibilities of comparing test results. This indicates the need to systematize this type of tests and for this purpose a root distribution model (RDM) can be used, which can be integrated with any deformation bundle model (RBM). A combination of these two calculation models allows the range of soil reinforcement around trees to be determined and this information might be used in practice, while planning bioengineering procedures in areas exposed to surface mass movements. The functionality of this solution can be increased by considering the dynamics of plant develop¬ment in the calculations. This, however, requires conducting this type of research in order to obtain more data.