Bibliografie tematiche / Roots

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Letteratura scientifica selezionata sul tema "Roots"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 30 luglio 2024

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Articoli di riviste sul tema "Roots"

Skaggs, Todd H., e Peter J. Shouse. "Roots and Root Function: Introduction". Vadose Zone Journal 7, n. 3 (agosto 2008): 1008–9. http://dx.doi.org/10.2136/vzj2008.0076.

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Hassan, Affendy, Dorte Bodin Dresbøll e Kristian Thorup-Kristensen. "Naturally coloured roots as a tool for studying root interactions in mixed cropping". Plant, Soil and Environment 67, No. 12 (10 dicembre 2021): 700–710. http://dx.doi.org/10.17221/154/2021-pse.

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The objective of this study was to evaluate the usage of species with coloured roots to study root growth patterns during intercropping. Red beet (Beta vulgaris L. cv. Detroit), having clear red roots, was used in a semi-field and field experiment to allow identification and quantification of roots of the individual species in the mixture. In the field experiment, red beet was strip intercropped with lucerne (Medicago sativa L. cv. Creno) and kale (Brassica oleracea L. var. Sabellica), respectively while the red beet-lucerne intercropping was conducted in large rhizoboxes where root growth distribution and <sup>15</sup>N isotope uptake was determined. The study confirmed that the direct visual measurement of root growth using species with coloured roots and indirect tracer uptake measurements contributed to the success of studying root growth dynamics in intercropping systems. Red beet root intensity was not considerably affected by the strip intercropping when the crops were established at the same time, but when established between existing lucerne strips, a reduction in roots at the border row was shown. Lucerne and kale were both observed to be able to exploit the deep soil layers beneath the red beet border row.

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Reșceanu, Ion. "Monarchy by Divine Right as per the Books of Kings in “The Teachings of Neagoe Basarab to His Son Theodosius”". Romanian Orthodox Old Testament Studies 10, n. 2 (31 dicembre 2023): 34–45. http://dx.doi.org/10.24193/roots.2023.2.3.

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The present study aims to address the issue of monarchy by divine right in The Teachings of Neagoe Basarab to His Son Theodosius, which, due to its defining role in the most important work of the Romanian Middle Ages, allows one to observe how Saint Neagoe Basarab bases his teachings on references to the Holy Scriptures and to the Old Testament in particular. Furthermore, the chosen topic allows one to also understand the specific pillars of Slavic Byzantine Eastern theological culture which Neagoe Basarab highlights authentically and originally in his remarkable work.

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Manolache, Ioan-Daniel. "Levirate Marriage – An Overview of an Ancient Matrimonial Custom". Romanian Orthodox Old Testament Studies 9, n. 1 (31 agosto 2023): 42–56. http://dx.doi.org/10.24193/roots.2023.1.3.

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This paper utilizes historical-critical analysis to elucidate the ancient institution of levirate marriage, a type of marital union attested in Assyria, Ugarit, Hatti, ancient Israel, and beyond. It investigates the socio-cultural logic underlying levirate practices as well as their ramifications upon communal dynamics. Through examination of biblical episodes concerning Judah and Tamar along with Boaz and Ruth, two illuminating case studies emerge that reveal the complex interplay of kinship ties, lineage preservation, inheritance rights, and evolving cultural mores governing this marital custom over time. Expanding the historical lens, the study explores post-antiquity manifestations of levirate ideals resurfacing during the Middle Ages and modern period. Yet despite sporadic echoes across human civilization, levirate marriage remains an almost extinct phenomenon today – one largely confined to antiquity. By training a spotlight on ancient Near Eastern sources alongside salient biblical narratives, this investigation unveils the once prominent but now obscure levirate tradition which empowered past generations while also spurring social tensions, informing timeless tropes of sexuality and widowhood, and catalysing legal reforms over successive epochs.

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Vlaicu, Patriciu-Dorin. "Biblical and Canonical Grounds for assuming the fulfilment of Man in the Ecclesial Ministry". Romanian Orthodox Old Testament Studies 9, n. 1 (31 agosto 2023): 76–89. http://dx.doi.org/10.24193/roots.2023.1.5.

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This text explores the path towards human fulfilment in ecclesial ministry. It sees man's call to growth as a path to realizing one's God-given potential. Although sin obscures this call, God gently guides man toward renewal, culminating in Christ's restorative work. Seeking the kingdom reorients one's priorities toward eternity and aligns personal gifts with God's will. The Church nurtures these gifts, making each believer a vital, responsible member of Christ's Body. Through partaking of grace, one becomes a witness to the world. However, authentic Christian living requires continual purification. The calling to priesthood represents the pinnacle of service through total dedication. Chosen for their maturity and theological grounding, priests devote themselves completely to equipping believers for ministry. Necessary qualities include blamelessness, prudence, and virtuous living. Pastoral ministry starts from an inner call later confirmed by the Church. One who feels drawn to service and theological study discovers through this process a crystallization of vocation, assuming responsibility for living out God's gifts.

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Morariu, Maxim (Iuliu-Marius). "“The Teachings of Neagoe Basarab to His Son Theodosius” – a Historiographic Retrospective". Romanian Orthodox Old Testament Studies 10, n. 2 (31 dicembre 2023): 26–33. http://dx.doi.org/10.24193/roots.2023.2.2.

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On the commemoration of five centuries after the death of Romanian Ruling Prince Neagoe Basarab (1512-1521), one of the most important representatives of cultural resistance on Romanian territory in the Middle Ages, the author of the present paper shines a light on the history, context and influences of his masterpiece, The Teachings of Neagoe Basarab to His Son Theodosius. Thus, the paper highlights Neagoe Basarab’s prophetic side, how his writings bring education to his people or the influences of authors like Basil I the Macedonian or Constantine Porphyrogenites on his style and ideas. At the same time, due attention is given to the influence of his work of patristic voices such as St John Chrysostom, Dionysius the Areopagite, John Climacus or mystical authors such as Varlaam și Iosafat, to his way of thinking, and the metamorphosis of his ideas. Furthermore, potential influences such as the one of Machiavelli and his chief work, The Prince, are also brought to attention in the paper, emphasising that there are voices that persist in the claim that the Italian author may have influenced Neagoe Basarab’s activity. The paper concludes, among other things, that, through his work, Neagoe Basarab managed to pave the way for Humanist culture on Romanian territory.

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Moldovan, Alexandru. "Portrait of St. John the Baptist in the prologue of the Fourth Gospel". Romanian Orthodox Old Testament Studies 9, n. 1 (31 agosto 2023): 24–41. http://dx.doi.org/10.24193/roots.2023.1.2.

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This article analyses the portrait of John the Baptist in the prologue of the Gospel of John. It explores both the hymnic prologue (Jn 1:6-8.15) which speaks of John as the witness “sent by God” to testify to the coming Light, as well as the narrative prologue (Jn 1:19-34) where John denies being the Messiah but points to the “Lamb of God who takes away the sin of the world.” The study excavates the mission, role, and testimony of the Baptizer in preparing the way for Christ. Though subordinate to Jesus, John is presented as the first and paradigmatic witness who actualizes the prophetic tradition to proclaim the arrival of the long-awaited salvation. His testimony progresses from affirming the unknown presence of the One “standing among you” to explicitly identifying Jesus as the pre-existent Son. While the Johannine prologue features multiple witnesses to Christ, John the Baptist is the foremost herald who fades humbly into the background once the Bridegroom appears. As the study unpacks this rich, multi-layered portrait across the opening chapters of John's Gospel, it illuminates John's vital function in revealing the incarnate Logos to the world.

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Bora, Ion-Sorin. "Theodore of Mopsuestia – an exponential exegete of the Antiochian School in the golden age of Christianity". Romanian Orthodox Old Testament Studies 9, n. 1 (31 agosto 2023): 12–23. http://dx.doi.org/10.24193/roots.2023.1.1.

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This paper explores the life and work of Theodore of Mopsuestia, a key exponent of the Antiochene school of biblical interpretation. After providing biographical background situating Theodore as a student of Libanius and Diodore of Tarsus, the article outlines the history of the School of Antioch and Theodore's role as a teacher propagating principles of grammatical-historical exegesis. His prolific writings included commentaries on much of Scripture, though his interpretation emphasized the literal sense while downplaying typological readings. Doctrinally, Theodore combatted contemporary heresies but evidenced questionable Christology himself. He spoke of two subjects or persons in Christ and rejected the communication of attributes between Christ's divinity and humanity. Though initially orthodox, Theodore's theology anticipated Nestorian ideas, leading Cyril of Alexandria to critique his work. Ultimately the Fifth Ecumenical Council condemned Theodore posthumously. Modern scholarship has aimed to rehabilitate his legacy by distinguishing his use of terminology, assessing newly discovered writings, and analysing translation issues, yet his condemnation has not been overturned. Thus, this study presents a complex picture of this exegetical pioneer – a creative, ingenious interpreter who crossed boundaries into heterodoxy.

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Mihăilă, Alexandru. "The Teachings of Amenemope and the Book of Proverbs of Solomon (22:17-24:22)". Romanian Orthodox Old Testament Studies 10, n. 2 (31 dicembre 2023): 69–81. http://dx.doi.org/10.24193/roots.2023.2.5.

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The study explores the links between the Teachings of Amenemope from Ancient Egypt and the Proverbs of Solomon book. Egyptologist Erman observed the first connections. Since then, there have been hypotheses about the Proverbs author’s access to Amenemope’s text. Analysis reveals significant parallels between the two works – calls for obedience, respect for the poor and elderly, and warnings against greed. The author also highlights specific adaptations to Israelite realities and beliefs. He notes the Egyptian influence on biblical wisdom, with the author redefining this wisdom in an Israelite context. The influences point to a universalist view, transcending cultural boundaries, with the search for wisdom from diverse sources.

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Chirilă, Ioan. "“The Teachings of Neagoe Basarab” – a Manual of Leadership and a Model of Dynamic Embodiment of the Eternal Word". Romanian Orthodox Old Testament Studies 10, n. 2 (31 dicembre 2023): 13–25. http://dx.doi.org/10.24193/roots.2023.2.1.

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The work of the Wallachian ruler Neagoe Basarab “The Teachings to his son Theodosius” remains an essential landmark of medieval Romanian culture and spirituality. The writing synthesizes an original vision of Christian teaching with the great models of universal political thought, becoming a manual for future rulers. Its importance is reflected in its overwhelming influence on later Romanian culture, as well as in the timeliness of its perspective on leadership based on enduring values. This study highlights the author's multiple sources of inspiration, harmoniously integrating biblical, patristic and philosophical traditions in a work that goes beyond medieval political treatises. From a theological perspective, the writing reflects a unified conception of divine revelation, promoting a mystical pedagogy that proposes a model of integral human formation. And the virtues and values enunciated have universal anthropological resonances. Thus, the integral message of Neagoe Basarab's work is not only a major expression of local political literature but also a permanent invitation to rediscover the Christian ethos that was the basis of European culture. And the recovery of this spiritual paradigm remains indispensable for overcoming the contemporary crisis.

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Tesi sul tema "Roots"

Calusi, Benedetta. "Penetration Mechanics of Plant Roots and Related Inspired Robots". Doctoral thesis, Università degli studi di Trento, 2018. https://hdl.handle.net/11572/367957.

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The ability of plant roots to penetrate soils is affected by several stimuli from the surrounding medium such as mechanical stresses and chemical changes. Therefore, roots have developed multiple responses to the several outer stimuli. Since plant roots have to face very complex problems to grow deeply into the ground, they are remarkable examples of problem-solving behaviour and adaptation to the outer constraints. The adaptation strategies of a natural root are not yet completely known and understood with exhaustive explanations. For this reason, mathematical models and experimental techniques applied to biological phenomena can perform a key role in translating the Nature adaptive solutions into engineering applications. The aim of this thesis is to provide further insights in understanding biological phenomena for the development of new technologies inspired by the adaptive ability of plant roots. Accordingly, both theoretical and experimental explanations to the adaptive behaviour of plant roots are proposed. The mathematical modelling is based on a modified version of the extended West, Brown and Enquist universal law, considering the root growth as an inclusion problem. The proposed equation has as a particular case a growth equation exploiting an approach similar to Lockhart taking into account the soil impedance. The influence of mechanical stresses and nutrient availability on the root growth are studied. The solutions of the analytical models are compared with experimental data collected in real and artificial soils. In addition, the theories and hypotheses of the root ability to grow in the apical region through nanoindentation, wettability, and photoelasticity are investigated. The first technique provided insights for the possible role and function at both different tissues levels and distances from the tip in the root movement and penetration during the growth. The investigation of root tissue properties revealed that the penetration and adaptation strategies adopted by plant roots could be enhanced by a combination of soft and stiff tissues. The second technique aimed to highlight the wettability of the apical zone and root hairs for the acquisition of water and nutrients. Finally, photoelastic experiments provided a non-invasive and in situ observation of plant roots growth and, by exploiting the fringe multiplication, a set up for the study of plant roots growing in edible gelatine is proposed.

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Calusi, Benedetta. "Penetration Mechanics of Plant Roots and Related Inspired Robots". Doctoral thesis, University of Trento, 2018. http://eprints-phd.biblio.unitn.it/3015/1/BenedettaCalusiPhDThesis.pdf.

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Lorentz, Rudy. "Roots and Routes". Thesis, Konstfack, Grafisk design & illustration, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:konstfack:diva-6338.

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The project Roots and Routes is an intergenerational narrative connecting three locations: London, Mandeville and Stockholm, focusing primarily on the histories of women and non-binary people. It looks at what affect it has on our sense of cultural identity to grow up in the diaspora, disconnected from the country of our parents or grandparents. Roots and Routes presents the search for a sense of belonging, whilst existing in the in-between. This report explores the different elements of the project, through text and image.

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Poirier, Schmitz Alfredo. "Approximating square roots". Pontificia Universidad Católica del Perú, 2014. http://repositorio.pucp.edu.pe/index/handle/123456789/96654.

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Browning, Robin Eileen. "Evolution of roots". CONNECT TO THIS TITLE ONLINE, 2008. http://etd.lib.umt.edu/theses/available/etd-08282008-142232/.

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Skidmore, Jennifer Elaine. "Thoroughbreds European roots /". Click here to view, 2010. http://digitalcommons.calpoly.edu/agbsp/18/.

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Thesis (B.S.)--California Polytechnic State University, 2010.
Project advisor: Jim Ahern. Title from PDF title page; viewed on Mar. 24, 2010. Includes bibliographical references. Also available on microfiche.

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Noble, Hannah. "Mueller Matrix Roots". Diss., The University of Arizona, 2011. http://hdl.handle.net/10150/204893.

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This dissertation is comprised of two separate topics within the domain of polarization optical engineering. The first topic is a Mueller matrix roots decomposition, and the second topic is polarization computer generated holography. The first four chapters of the dissertation are on the topic of the Mueller matrix roots decomposition. Recently, an order-independent Mueller matrix decomposition was proposed in an effort to organize the nine depolarization degrees of freedom. Chapter 1 discusses relevant Mueller matrix decomposition prior art and the motivation for this work. In chapter 2, the critical computational issues involved in applying this Mueller matrix roots decomposition are addressed, along with a review of the principal root and common methods for its calculation. The choice of the pth root is optimized at p = 10⁵, and computational techniques are proposed which allow singular Mueller matrices and Mueller matrices with a half-wave of retardance to be evaluated with the matrix roots decomposition. A matrix roots algorithm is provided which incorporates these computational results. In chapter 3, the Mueller matrix roots decomposition is reviewed and a set of Mueller matrix generators are discussed. The parameterization of depolarization into three families, each with three degrees of freedom is explained. Analysis of the matrix roots parameters in terms of degree of polarization maps demonstrates that depolarizers fall into two distinct classes: amplitude depolarization in one class, and phase and diagonal depolarization in another class. It is shown that each depolarization family and degree of freedom can be produced by averaging two non-depolarizing Mueller matrix generators. This is extended to provide further insight on two sample measurements, which are analyzed using the matrix roots decomposition. Chapter 4 discusses additional properties of the Mueller matrix roots generators and parameters, along with a pupil aberration application of the matrix roots decomposition. Appendix C, adapted from a conference proceedings paper, presents an application of the matrix roots depolarization parameters for estimating the orientation of a one-dimensionally textured object. The last two chapters are on the topic of polarization computer generated holography. In chapter 5, an interlaced polarization computer-generated hologram (PCGH) is designed to produce specific irradiance and polarization states in the image plane. The PCGH produces a tangentially polarized annular pattern with correlated speckle, which is achieved by a novel application of a diffuser optimization method. Alternating columns of orthogonal linear polarizations illuminate an interlaced PCGH, producing a ratio of polarization of 88% measured on a fabricated sample. In chapter 6, an etched calcite square-wave retarder is designed, fabricated, and demonstrated as an illuminator for an interlaced polarization computer generated hologram (PCGH). The calcite square-wave retarder enables alternating columns of orthogonal linear polarizations to illuminate the interlaced PCGH. Together, these components produce a speckled, tangentially polarized PCGH diffraction pattern with a measured ratio of polarization of 84% and a degree of linear polarization of 0.81. An experimental alignment tolerance analysis is also reported.

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Erb, Ronald T. "The effect of roots on the shearing strength of soil". The Ohio State University, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=osu1119364987.

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Ma, Xinyi M. Arch Massachusetts Institute of Technology. "From roots to routes". Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/109027.

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Thesis: M. Arch., Massachusetts Institute of Technology, Department of Architecture, 2017.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 78-79).
Over the past two decades, more than 200 million people in China moved from rural to urban areas. These migrants fled the countryside, which is regarded as an economic wasteland in perpetual stagnation that is locked by feudal traditions and peasant values, to the largest cities. They sought to be connected to a modern China, one that is marked by a booming economy and pronounced popular culture. These rural- to-urban migrants have formed the largest peacetime inland migration in history. Mobility is a socially produced motion that often bears ideologies. It is associated with a desire for progress, freedom, and opportunity. The massive inland migration in China demonstrates the tremendous social force that aims to overcome the outdated social strata. However, as migrants move, limitations on mobility emerge. The Hukou, the household registration system in China, is an institutional framework that has entrenched the social strata for ages. Records of births, marriages, and moves identify each person with a place. As soon as migrants move from their designated origins, immobility appears: welfare exclusion, job inequity, urban transit inaccessibility, to name just a few. This thesis proposes to study this condition of mobility, immobility and estrangement in the district of Minhang, Shanghai, where 1.5 million migrants currently live and work. Scooter, an emerging fast and cheap personal vehicle, is the protagonist in this story of migrants. Linking closely to migrants' life, scooters are not only their primary means of transportation but also their means of production. Its mobility empowers migrants to move beyond their territory, while its unique scale and flexibility links to rich spatial possibilities.
by Xinyi Ma.
M. Arch.

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Marx, Aaron J. "THE ROOTS OF SUFFERING". Bowling Green State University / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1155839549.

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Libri sul tema "Roots"

V, Abdulla, a cura di. Roots. Hyderabad: Orient Longman, 2002.

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1979-, Bedarida Raffaele, a cura di. Roots. Milano: Charta, 2012.

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Brathwaite, Kamau. Roots. Ann Arbor,Mich: University of Michigan Press, 1993.

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Farndon, John. Roots. Detroit: Blackbirch Press, 2006.

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Molebalwa, Gaoretelelwe. Roots. [Johannesburg, South Africa]: Botho Publishing, 2007.

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Whitehouse, Patricia. Roots. Chicago, Ill: Heinemann Library, 2009.

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Haley, Alex. Roots. London: Vintage, 1991.

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Farndon, John. Roots. San Diego, CA: Blackbirch Press, 2005.

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Stone, Lynn M. Roots. Vero Beach, FL: Rourke Pub., 2008.

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Wolper, David L., William Blinn e Stan Margulies. Roots. 3^a ed. Burbank, CA: Warner Brothers Entertainment, 2011.

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Capitoli di libri sul tema "Roots"

Berg, Björn, e Charles McClaugherty. "Decomposition of Root Tips, Fine Roots, and Coarse Roots". In Plant Litter, 189–208. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-59631-6_8.

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Gabriel, P., e A. V. Roiter. "Roots". In Representations of Finite-Dimensional Algebras, 56–62. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-642-58097-0_6.

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Gelfand, Israel M., e Alexander Shen. "Roots". In Algebra, 120–23. Boston, MA: Birkhäuser Boston, 2004. http://dx.doi.org/10.1007/978-1-4612-0335-3_63.

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Simons, Geoff. "Roots". In The United Nations, 3–34. London: Palgrave Macmillan UK, 1994. http://dx.doi.org/10.1007/978-1-349-23389-2_1.

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Kirschner, Roman. "Roots". In Code und Material Exkursionen ins Undingliche, 142–51. Vienna: Springer Vienna, 2010. http://dx.doi.org/10.1007/978-3-7091-0121-6_13.

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Dolan, L., P. Linstead, K. Roberts, T. I. Baskin, R. Williamson, P. Benfey, J. W. Schiefelbein, K. Okada e Y. Shimura. "Roots". In Arabidopsis, 91–131. New York, NY: Springer New York, 1994. http://dx.doi.org/10.1007/978-1-4612-2598-0_2.

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Passione, Roberta. "Roots". In Psychiatry and the Human Condition, 65–102. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-09304-3_4.

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Beebe, Nelson H. F. "Roots". In The Mathematical-Function Computation Handbook, 215–42. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-64110-2_8.

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Kraehmer, Hansjoerg. "Roots". In Grasses, 435–46. Chichester, UK: John Wiley & Sons, Ltd, 2019. http://dx.doi.org/10.1002/9781119417095.ch9.

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Datta, Surja, Sandeep Roy e Tobias Kutzewski. "Roots". In Unlocking Strategic Innovation, 94–118. New York: Routledge, 2021.: Routledge, 2021. http://dx.doi.org/10.4324/9780429317514-6.

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Atti di convegni sul tema "Roots"

Lafaille, Alexis. "Roots". In SIGGRAPH '15: Special Interest Group on Computer Graphics and Interactive Techniques Conference. New York, NY, USA: ACM, 2015. http://dx.doi.org/10.1145/2745234.2746798.

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Bianchi, Giovanni, Aldo Agoni e Simone Cinquemani. "Design of a Pneumatic Growing Robot Inspired to Plants’ Roots". In ASME 2021 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/smasis2021-67686.

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Abstract Although plants are usually seen as static organisms, they exhibit a wide range of movements that only in recent years have been considered as a source of inspiration for robots. The motion of roots is one of the most interesting, because they are extraordinary diggers, able to navigate in unstructured environments, finding their way around obstacles. Moreover, root growth is featured by high energy efficiency because they penetrate the soil adding new material at their tip, without moving the already grown part, preventing friction from dissipating energy and reducing the inertia. A robot inspired to roots’ growth could be employed in search and rescue operations or in environmental monitoring. In this work the design of a soft robot inspired to root’s growth is presented. The body of the robot consists of a cylindrical plastic membrane folded inside itself. When air is blown from the base, the body of the robot is inflated, and its tip is everted increasing its length. On the external surface some Velcro stripes are mounted, which keep the membrane folded. Inside the tip a head is mounted, where the mechanism controlling the direction of growth is placed. It consists of a housing for some balloons, which can be inflated selectively, and their expansion exerts a pressure on the external surface able to open the Velcro stripes. The direction of growth is controlled by selecting which balloon to inflate. The robot has been built and a kinematic model of its motion in the plane has been developed and compared with experimental results.

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Casazza, Jack (John). "Forgotten roots". In 2007 IEEE Conference on the History of Electric Power. IEEE, 2007. http://dx.doi.org/10.1109/hep.2007.4510257.

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Joisha, Pramod G. "Overlooking roots". In the 6th international symposium. New York, New York, USA: ACM Press, 2007. http://dx.doi.org/10.1145/1296907.1296926.

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Plecnik, Mark M., e Ronald S. Fearing. "Finding Only Finite Roots to Large Kinematic Synthesis Systems". In ASME 2016 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/detc2016-60428.

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In this work, a new method is introduced for solving large polynomial systems for the kinematic synthesis of linkages. The method is designed for solving systems with degrees beyond 100,000, which often are found to possess a number of finite roots that is orders of magnitude smaller. Current root-finding methods for large polynomial systems discover both finite and infinite roots, although only finite roots have meaning for engineering purposes. Our method demonstrates how all infinite roots can be avoided in order to obtain substantial computational savings. Infinite roots are avoided by generating random linkage dimensions to construct start-points and start-systems for homotopy continuation paths. The method is benchmarked with a four-bar path synthesis problem.

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Choi, Ricky Y. S., e Arthur K. O. So. "On the Application of Mechanical Reinforcement of Tree Roots to Slope Stabilization". In The HKIE Geotechnical Division 41st Annual Seminar. AIJR Publisher, 2022. http://dx.doi.org/10.21467/proceedings.126.24.

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The root strengthening effects on soil behind retaining walls may be quantified by a simplified equation ΔS = 1.2TR(AR/A) where ΔS, TR and AR/A are the shear strength increase, tensile strength of root and root area ratio respectively. However, this effect is ignored during stability analysis due to the possible significant variability of the potential beneficial effect and extreme difficulty in fully characterizing the tree roots and quantifying their effects. In this paper, advancements in the last few decades in biotechnical slope stability are reviewed. Representative models to quantify the mechanical effects of tree roots are studied. If other potential beneficial effects due to existence of roots and suction effect due to transpiration of tree are ignored, the term 1.2, root tensile strength and root area ratio may still be the three key parameters to the root strengthening effect in slope stability.

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Yoo, Daisy, Peter Dalsgaard, Alix Ducros, Aurélien Tabard, Eva Eriksson e Clemens Nylandsted Klokmose. "Putting Down Roots". In DIS '20: Designing Interactive Systems Conference 2020. New York, NY, USA: ACM, 2020. http://dx.doi.org/10.1145/3357236.3395587.

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Mancini, Ferdinando. "Our own roots". In HIGHLIGHTS IN CONDENSED MATTER PHYSICS. AIP, 2003. http://dx.doi.org/10.1063/1.1639604.

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Ma, Zane, James Austgen, Joshua Mason, Zakir Durumeric e Michael Bailey. "Tracing your roots". In IMC '21: ACM Internet Measurement Conference. New York, NY, USA: ACM, 2021. http://dx.doi.org/10.1145/3487552.3487813.

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Sawa, Shunichiro, Mitsutoshi Ishimura, Yuya Omiya e Toshiyuki Sawa. "3-D FEM Stress Analysis of Screw Threads in Bolted Joints Under Static Tensile Loadings". In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-38089.

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The stress concentration factor (SCF) for the roots of screw threads in bolted joints under static loadings is analyzed using 3-D elastic FEM taking account the spiral of screw threads. At first, the stress states at the roots of screw threads in initial clamping state in a bolted joint where two hollow cylinders were clamped with a bolt and a nut were analyzed in initial clamping. The elastic FEM result of SCF for the first root was obtained as SCF=3.2. When the bolt was clamped in initial clamping (preload) at the 60 % of bolt yield stress, the plastic deformations were found at the first and the second roots, and non-engaged screw threads. It was found that as the external tensile loads increased, the development in plastic deformation region increased from the first root to the other roots as well as the non-engaged screw threads. It was found that the rupture occurred from the non-engaged screw threaded part while the plastic deformation increased at each root of screw threads. The numerical result was coincided with the experimental result. In the experiments, it was observed that the rupture occurred from the non-engaged screw thread and not from the first root of screw thread. Also, the bolt fatigue was predicted from FEM and it was shown that a fatigue fracture occurred from the first root.

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Rapporti di organizzazioni sul tema "Roots"

Sizer, Walter. Continued Roots. Washington, DC: The MAA Mathematical Sciences Digital Library, febbraio 2010. http://dx.doi.org/10.4169/capsules003373.

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Stanley, April Elisha. Irish Roots. Ames: Iowa State University, Digital Repository, settembre 2016. http://dx.doi.org/10.31274/itaa_proceedings-180814-1616.

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Galor, Oded, e Marc Klemp. Roots of Autocracy. Cambridge, MA: National Bureau of Economic Research, marzo 2017. http://dx.doi.org/10.3386/w23301.

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Galor, Oded, Marc Klemp e Daniel Wainstock. Roots of Inequality. Cambridge, MA: National Bureau of Economic Research, agosto 2023. http://dx.doi.org/10.3386/w31580.

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LaBonte, Don, Etan Pressman, Nurit Firon e Arthur Villordon. Molecular and Anatomical Characterization of Sweetpotato Storage Root Formation. United States Department of Agriculture, dicembre 2011. http://dx.doi.org/10.32747/2011.7592648.bard.

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Original objectives: Anatomical study of storage root initiation and formation. Induction of storage root formation. Isolation and characterization of genes involved in storage root formation. During the normal course of storage root development. Following stress-induced storage root formation. Background:Sweetpotato is a high value vegetable crop in Israel and the U.S. and acreage is expanding in both countries and the research herein represents an important backstop to improving quality, consistency, and yield. This research has two broad objectives, both relating to sweetpotato storage root formation. The first objective is to understand storage root inductive conditions and describe the anatomical and physiological stages of storage root development. Sweetpotato is propagated through vine cuttings. These vine cuttings form adventitious roots, from pre-formed primordiae, at each node underground and it is these small adventitious roots which serve as initials for storage and fibrous (non-storage) “feeder” roots. What perplexes producers is the tremendous variability in storage roots produced from plant to plant. The marketable root number may vary from none to five per plant. What has intrigued us is the dearth of research on sweetpotato during the early growth period which we hypothesize has a tremendous impact on ultimate consistency and yield. The second objective is to identify genes that change the root physiology towards either a fleshy storage root or a fibrous “feeder” root. Understanding which genes affect the ultimate outcome is central to our research. Major conclusions: For objective one, we have determined that the majority of adventitious roots that are initiated within 5-7 days after transplanting possess the anatomical features associated with storage root initiation and account for 86 % of storage root count at 65 days after transplanting. These data underscore the importance of optimizing the growing environment during the critical storage root initiation period. Water deprivation during this phenological stage led to substantial reduction in storage root number and yield as determined through growth chamber, greenhouse, and field experiments. Morphological characterization of adventitious roots showed adjustments in root system architecture, expressed as lateral root count and density, in response to water deprivation. For objective two, we generated a transcriptome of storage and lignified (non-storage) adventitious roots. This transcriptome database consists of 55,296 contigs and contains data as regards to differential expression between initiating and lignified adventitious roots. The molecular data provide evidence that a key regulatory mechanism in storage root initiation involves the switch between lignin biosynthesis and cell division and starch accumulation. We extended this research to identify genes upregulated in adventitious roots under drought stress. A subset of these genes was expressed in salt stressed plants.

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Johnston, Jeffery. Clay, roots, and coexistence. Portland State University Library, gennaio 2000. http://dx.doi.org/10.15760/etd.2764.

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Waisel, Yoav, Bobbie McMichael e Amram Eshel. Decision Making within Plant Root Systems. United States Department of Agriculture, marzo 1996. http://dx.doi.org/10.32747/1996.7613030.bard.

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Architecture of a root system is the expression of the potential of various root types to branch, to grow and to coordinate with other plant organs, under the specific limitations of the environmental conditions. The present investigation has proven the following points. 1) Genotypes with different types of root systems were identified. The growth patterns of their roots and the distribution of laterals along their main axes were recorded. 2) The patterns of development of the root systems of four cotton genotypes, throughout the entire life cycle of the plants, were described, even at such a late stage of development when the total length of the roots exceeded two kilometers. To the best of our knowledge, this is the first time that an analysis of this type is accomplished. 3) The development of root systems under restrictive soil conditions were compared with those that have developed under the non-restrictive conditions of aeroponics. Results indicate that in the absence of the mechanical impedance of the soil, cotton plants develop single roots that reach the length of 6 m, and have a total root length of 2000 m. Thus, root growth is strongly inhibited by the soil, with some root types being inhibited more than others. 4) One of the important decisions, in constructing an operational root system architecture of mature plants, is the shift of the balance between various root fractions in favor of the very fine roots. 5) Root system architecture is determined, in part, by the sites of initiation of the lateral roots. This is determined genetically by the number of xylem archs and by the totuosity of the stele. Selection for such traits should be sought.

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Galor, Oded, e Viacheslav Savitskiy. Climatic Roots of Loss Aversion. Cambridge, MA: National Bureau of Economic Research, novembre 2018. http://dx.doi.org/10.3386/w25273.

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Cochrane, John. The Fiscal Roots of Inflation. Cambridge, MA: National Bureau of Economic Research, maggio 2019. http://dx.doi.org/10.3386/w25811.

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Marshak, David. Bowstreet Comes Back to Its Roots. Boston, MA: Patricia Seybold Group, gennaio 2002. http://dx.doi.org/10.1571/cp1-10-02cc.

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