Gotowe bibliografie tematyczne / Pione / Rozprawy doktorskie

Rozprawy doktorskie na temat „Pione”

Kliknij ten link, aby zobaczyć inne rodzaje publikacji na ten temat: Pione.
Autor: Grafiati
Data publikacji: 27 lipca 2024
Data aktualizacji: 29 lipca 2024

Utwórz poprawne odniesienie w stylach APA, MLA, Chicago, Harvard i wielu innych

Wybierz rodzaj źródła:

Sprawdź 50 najlepszych rozpraw doktorskich naukowych na temat „Pione”.

Przycisk „Dodaj do bibliografii” jest dostępny obok każdej pracy w bibliografii. Użyj go – a my automatycznie utworzymy odniesienie bibliograficzne do wybranej pracy w stylu cytowania, którego potrzebujesz: APA, MLA, Harvard, Chicago, Vancouver itp.

Możesz również pobrać pełny tekst publikacji naukowej w formacie „.pdf” i przeczytać adnotację do pracy online, jeśli odpowiednie parametry są dostępne w metadanych.

Przeglądaj rozprawy doktorskie z różnych dziedzin i twórz odpowiednie bibliografie.

1

BONUTTI, FAUSTINO. "MISURA DELLA DIPENDENZA DAL NUMERO DI MASSA DELLA REAZIONE PIONE POSITIVO PIONE POSITIVO E PIONE POSITIVO/NEGATIVO SU NUCLEI". Doctoral thesis, Università degli studi di Trieste, 1995. http://thesis2.sba.units.it/store/handle/item/12901.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
2

FRAGIACOMO, ENRICO. "LA DIFFUSIONE ELASTICA PIONE-PROTONE NELLA REGIONE DI INTERFERENZA COULOMBIANO-NUCLEARE". Doctoral thesis, Università degli studi di Trieste, 2000. http://thesis2.sba.units.it/store/handle/item/12689.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
3

Lacroix, Benoit 1960. "Pion charges distribution in presence of induced transitions". Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65496.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
4

Li, Zhujun L. "An analysis of pion photoproduction". Diss., Virginia Tech, 1992. http://hdl.handle.net/10919/40180.

Pełny tekst źródła
Streszczenie:
A partial-wave analysis of pion photoproduction data up to a photon lab energy of 1.8 GeV has been performed. Both energy-dependent and energy-independent solutions have been obtained. The energy-dependent parametrization incorporates the recently determined elastic pion nucleon scattering amplitudes in such a way as to satisfy unitarity and utilize the resonance structure contained in the pion nucleon elastic amplitudes. Starting from the energy-dependent solution, energy-independent partial-wave solutions are obtained at a set of energies from threshold to 1.8 GeV. The data base used in the analysis contains 11,911 data from the reactions. The predictions of our solution are compared with the experimental data and previous analyses. Suggestions are made for future experiments. A total of sixteen resonances exist in the energy range from threshold to 1.8 GeV. These resonance states are studied using our energy-independent solutions. Photon decay couplings to the sixteen resonances are extracted. These couplings are also compared with previous solutions and quark model predictions.
Ph. D.
Style APA, Harvard, Vancouver, ISO itp.
5

Scheinast, Werner. "Schwellennahe Erzeugung von Kaonen und Antikaonen in Proton-Kern-Stößen". Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2004. http://nbn-resolving.de/urn:nbn:de:swb:14-1098890673515-82225.

Pełny tekst źródła
Streszczenie:
Am Schwerionensynchrotron der GSI Darmstadt wurde die Produktion von K- und pi-Mesonen in Proton-Kern-Kollisionen ("pA") experimentell untersucht. Verschiedene Targetkerne (C, Au), Strahlenergien (1.6, 2.5, 3.5 GeV) und Beobachtungswinkel (32°-64°) ergaben eine reichhaltige Systematik und gestatteten Extrapolationen auf totale Wirkungsquerschnitte. In der Arbeit werden Vergleiche der einzelnen Messungen miteinander und mit pA-Messungen anderer Gruppen angestellt und diskutiert. Die Einordnung zwischen pp- und AA-Daten und der Vergleich mit theoretischen Vorhersagen ermöglicht grundlegende Aussagen über das Verhalten von K-Mesonen in Kernmaterie, sogenannte Medium-Effekte.
Style APA, Harvard, Vancouver, ISO itp.
6

Ter-Antonyan, Ruben. "Search for rare multi-pion decays of the tau lepton using the BABAR detector". Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1143148602.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
7

Sossi, Vesna. "Pion induced pion production on deuterium". Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/31516.

Pełny tekst źródła
Streszczenie:
This thesis describes measurements of the pion induced pion production reaction π⁺d → π⁺π⁻p p performed with a 280 MeV incident π⁺ beam at TRIUMF. The data are compared with an improved version of the Oset and Vicente-Vacas theoretical model [12]. The goal of the experiment and of the analysis was to provide a larger body of data for the free reaction and to test the validity of theoretical models. In the process, the ability to determine the values of the coupling constants C, f∆ , gN*∆π within such a model framework would be explored. The knowledge of the precise value of these coupling constants would constrain N* decay branching ratios and other pion induced reaction mechanisms like Double Charge Exchange. A previous experiment [23] had indicated that the pion induced pion production on deuterium is essentially a quasifree process with the reaction occurring on the neutron leaving the proton merely a spectator. The main difference with respect to the free reaction is the effect of Fermi motion of the neutron. Although we were interested in studying the free reaction (π⁻p → π⁺π⁻n), we chose a deuterium target so that the experiment could be run with a π⁺beam, since the π⁻ beam flux is about 6 times lower than the flux of the positive pion beam at 280 MeV, the energy at which our experiment was performed. Such a flux would have required a much longer running time for the experiment in order to achieve the same statistical accuracy. The quasifree nature of the process was also confirmed in our experiment. This experiment involved a coincidence measurement of the quasifree process and as such provided four-fold differential cross section spectra of the reaction thus allowing for a microscopic comparison between data and theoretical models. In the theoretical description we incorporated additional amplitudes for the N* → N(ππ)p-wave diagrams required to describe the reaction cross section at Tπ = 280 MeV. We also added the Fermi motion of the nucleon to the model to account for the deuterium environment. The 'free' parameters of the model are the largely unknown coupling constants listed above. We fixed C to be -2.08 by requiring the energy dependence of the model to be that of the measurement of [22] and compared the energy and angular distributions of the model to our data for several values of the f∆ and gN*∆π coupling constants ranging between 0 and 2 (where the units are 4/5 fNNπ) and between 1.08 and 1.53 respectively. We found reasonable sensitivity of the model to the f∆ variation, but only limited sensitivity to the value of the gN*∆π coupling constant. Overall we achieved a very good agreement between data and the theoretical predictions for f∆ values smaller than 0.5 and gN*∆π values closer to its lower limit. Improved statistical accuracy of the data would however be needed to better constrain the values of the coupling constants. On the basis of our results we feel that this model is a useful tool for planning future experiments and that a more extensive (π, 2π) experimental program, where differential cross sections are measured for differing isospin channels, would provide a further, more stringent test on the model allowing for a more precise determination of the coupling constants.
Science, Faculty of
Physics and Astronomy, Department of
Graduate
Style APA, Harvard, Vancouver, ISO itp.
8

Horn, Tanja. "The pion charge form factor through pion electroproduction". College Park, Md. : University of Maryland, 2006. http://hdl.handle.net/1903/3486.

Pełny tekst źródła
Streszczenie:
Thesis (Ph. D.) -- University of Maryland, College Park, 2006.
Thesis research directed by: Physics. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
Style APA, Harvard, Vancouver, ISO itp.
9

Lara-Chavez, Alejandra M. "Somatic embryogenesis in southern and tropical pine species: Loblolly pine (Pinus taeda), Longleaf pine (P. palustris) and Oocarpa pine (P. oocarpa)". Diss., Virginia Tech, 2010. http://hdl.handle.net/10919/77176.

Pełny tekst źródła
Streszczenie:
The focus of the current project was to establish an improved and reliable protocol for somatic embryogenesis in 1) Pinus taeda and Pinus palustris; pine species of high value for commercial applications and germplasm conservation supported through breeding programs at The Virginia Department of Forestry (Chapter III); and 2) Pinus oocarpa; an economically important pine species in the southern half of Mexico and Central America (Chapter IV). In addition, 3) the study of the gene expression analysis of developmental stages of both somatic and zygotic embryos of P. taeda was compared to assess developmental fidelity at the molecular level (Chapter V). By testing four basal media combined with different plant growth regulator combinations, we have established stable embryogenic cultures from high value families of P. taeda and P. palustris using the tissue culture medium 1218 (Pullman et al 2005) in combination with an auxin:citokinin ratio at 10:5 (molar). However, optimization of the protocols for the maturation and further conversion of somatic embryos to seedlings requires further work. For P. oocarpa, we hypothesized that somatic embryo induction may be possible by mimicking natural seed-embryo developmental conditions, and a new tissue culture medium, based on the mineral content of the seed nutritive tissue (megagametophyte), was formulated. The novel culture medium (PO) was tested in combination with different plant growth regulator concentrations for the initiation of somatic embryogenesis from fresh collections of P. oocarpa immature zygotic embryos. Additionally, the established embryogenic cultures were able to mature and germinate, to our knowledge resulting in the first report of the production of P. oocarpa plantlets through somatic embryogenesis. PO medium also has the potential to be used successfully for other tropical pine species which today suffer from suboptimal somatic embryogenesis protocols. The fundamental study of molecular regulation of embryo development showed that under the current maturation conditions, P. taeda somatic embryos were temporally similar in gene expression to zygotic embryos of the same species. However, potentially important differences were found and results could potentially explain the low germination success during somatic embryogenesis. More research is still needed to further explore the natural environment of developing seed embryos to improve the somatic embryogenesis protocols and to enable full integration of this clonal propagation method into the breeding programs for pines.
Ph. D.
Style APA, Harvard, Vancouver, ISO itp.
10

Gross, Donovan. "Mountain Pine Beetle Fecundity and Offspring Size Differ Among Lodgepole Pine and Whitebark Pine Hosts". DigitalCommons@USU, 2008. https://digitalcommons.usu.edu/etd/34.

Pełny tekst źródła
Streszczenie:
Whitebark pine (Pinus albicaulis Engelmann) is a treeline species in the central Rocky Mountains. Its occupation of high elevations previously protected whitebark pine from long-term mountain pine beetle outbreaks. The mountain pine beetle, however, is currently reaching outbreaks of record magnitude in high-elevation whitebark pine. We used a factorial laboratory experiment to compare mountain pine beetle (Dendroctonus ponderosae Hopkins) life history characteristics between a typical host, lodgepole pine (Pinus contorta Engelmann), and whitebark pine. We tested the effects of natal host and brood host on beetle fecundity, offspring size, and brood sex-ratio. We reared mountain pine beetles from whitebark pine and from lodgepole pine, and infested half of them into their natal host and half into the other host. Fecundity was greater overall in lodgepole pine brood hosts. Among lodgepole brood hosts, beetles from whitebark pine had greater fecundity. Fecundity was also significantly related to phloem thickness, which was greater in lodgepole pine. Offspring were larger from whitebark brood hosts than from lodgepole, regardless of their parents’ natal host. Finally, sex-ratio was closer to 1:1 in lodgepole than in whitebark brood hosts. We conclude that host species affects life history of mountain pine beetle with consequences for individual beetle fitness.
Style APA, Harvard, Vancouver, ISO itp.
11

Rozon, Francis Martin. "Pion induced pion production on Oxygen at 280 MeV". Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/29379.

Pełny tekst źródła
Streszczenie:
A first coincident measurement of the pion induced pion production reaction cross-section on a complex nucleus (A > 2) has been successfully performed. In particular, the reaction ¹⁶O(π⁺,π⁺,π⁻) was measured at 280 MeV incident pion energy. The only previous published measures of this reaction on nuclei consisted of a dated measurement done on emulsion nuclei [BBD*69] and did not provide very stringent limits to the nuclear cross section. Single arm experiments have previously been done elsewhere on the proton [BJK*80] and the deuteron [PGM*84]. The reaction was measured at TRIUMF using the QQD magnetic spectrometer in coincidence with the CARUZ [RGR88], a total absorption scintillator range telescope. The measured four-fold differential cross sections were extrapolated to the unmeasured portions of the phase-space to extract the total reaction cross-section at 280 MeV, which was found to be σtot = 2.250 ± .350m6. The (π,2π) cross-section is thus observed to provide approximately 40% of the inclusive double charge exchange cross section [Woo84] at this energy. The model of [OV86] is found to explain many of the features of the data, including σtot. The present data do not preclude effects due to pion condensate precursor phenomena as proposed by [CE83] but they do not support the existence of a strong effect. The data are also compared to kinematical Monte Carlo simulations of some possible reaction mechanisms and it is found that the presence of an intermediate ∆ can aid the explanation of the low energy features of the π⁺ energy spectrum.
Science, Faculty of
Physics and Astronomy, Department of
Graduate
Style APA, Harvard, Vancouver, ISO itp.
12

Aouissat, Zoheir. "Corrélations pion-pion dans le milieu nucléaire chaud et dense". Grenoble 1, 1993. http://www.theses.fr/1993GRE10074.

Pełny tekst źródła
Streszczenie:
Un potentiel separable est construit pour traiter l'interaction - dans le vide. Il reproduit les dephasages dans le canal scalaire-isoscalaire et vecteur-isovecteur. Le modele est ensuite deploye dans la matiere nucleaire avec une prescription consistante pour la propagation des pions. Un schema a deux niveaux est etabli en couplant le pion aux excitations delta-trou. Le mixage et le repoussement des niveaux, a mesure que leur couplage se renforce, rend l'equation de dispersion du pion molle. Ceci provoque la formation d'une structure rehaussee pres du seuil 2 m# dans la fonction spectrale de 2 pions. La contrainte d'invariance de jauge detruit ce resultat dans le canal du meson rho, mais preserve le deplacement de la masse de ce dernier vers les hautes energies. Dans le canal du meson fictif sigma, la forte attraction entre pion a basse energie entraine la production d'etats lies a 2 pions a densite 0. Les excitations particules-trous poussent le champ fort a la condensation. Cette instabilite precede la condensation du pion simple. Deux objections a ceci sont a soulever. La premiere, qui n'est pas etudiee dans cette these, concerne la sensibilite de ce resultat aux effets hors couche de l'interaction. La seconde, detaillee dans la troisieme partie de ce travail, concerne l'effet des boucles fermioniques sur la propagation des 2 pions. La derniere partie de cette these a ete consacree a l'etude de la diffusion en presence d'un gaz chaud de pions susceptible de se former dans la region centrale dans les experiences urhic. Il en decoule que la section efficace de diffusion est considerablement diminuee dans les deux canaux de spin-isospin par rapport a celle dans le vide. Ceci suggere un temps de hadronisation tres court, pour rendre compte de l'exces des # mous de la collaboration na35
Style APA, Harvard, Vancouver, ISO itp.
13

Wallertz, Kristina. "Pine weevil feeding in Scots pine and Norway spruce regenerations /". Alnarp : Southern Swedish Forest Research Centre, Swedish University of Agricultural Sciences, 2009. http://epsilon.slu.se/200960.pdf.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
14

McCormick, John T. II. "Jack Pine Scraggly". Miami University / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=miami1091500019.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
15

DeGomez, Tom, i Deborah Young. "Pine Bark Beetles". College of Agriculture, University of Arizona (Tucson, AZ), 2015. http://hdl.handle.net/10150/550373.

Pełny tekst źródła
Streszczenie:
Revised; Originally Published 2002
4 pp.
Pine bark beetles in Arizona are generally of the genus Ips or Dendroctonus. Fading foliage in the tree is often the first sign of a beetle attack. Prevention is best practiced since control is not possible once the beetles have successfully colonized the tree. Colonization is dependent upon trees being in a vulnerable condition caused by stress from various agents and site conditions.
Style APA, Harvard, Vancouver, ISO itp.
16

DeGomez, Tom, i Deborah Young. "Pine Bark Beetles". College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2009. http://hdl.handle.net/10150/146729.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
17

Estenne, Vincent. "Electroproduction de pion au seuil sur le proton : comment atteindre le facteur de forme axial du nucléon ? Etude préparatoire de l'expérience et réalisation d'un spectromètre à pions". Lyon 1, 1988. http://www.theses.fr/1988LYO10152.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
18

Estenne, Vincent. "Electroproduction de pion au seuil sur le proton comment atteindre le facteur de forme axial du nucléon ? étude préparatoire de l'expérience et réalisation d'un spectromètre à pions /". Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb376133960.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
19

Oneil, Elaine E. "Developing stand density thresholds to address mountain pine beetle susceptibility in eastern Washington forests /". Thesis, Connect to this title online; UW restricted, 2006. http://hdl.handle.net/1773/5536.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
20

Collin, Niklas, Carl Ögren i Martin Thyrestam. "Frekvensanalys av pinne-skiva maskin". Thesis, KTH, Maskinkonstruktion (Inst.), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-183038.

Pełny tekst źródła
Streszczenie:
Denna rapport utreder funktion och problematik med en pinne-skiva maskin som används på Institutionen för Maskinkonstruktion vid KTH. Denna maskin används för forskning kring nötning av bland annat bromsskivor och belägg. Maskinen har påvisat ett ojämnt beteende vid vissa driftsfall, något som utreds i denna rapport. Resultaten har inte verifierats av faktisk provning utan består enbart av modellexperiment. Vad som framgick av analysen är att problematiken förekommer vid frekvenser vida högre än maskinens egna varvtal utan är ett resultat av dess övertoner. Problematiken kan primärt identifieras kring 80 Hz. Konstruktionsförändringar för att minska problemen redovisas.
This report investigates function and problems with a pin-disc machine used at the KTH Department of Machine Design. This machine is used for research on the wear of brake discs and pads. The machine reveals an uneven behavior at certain operating conditions, which are investigated in this report. The results have not been verified by actual physical testing.What has emerged from the analysis are problems that occurs at frequencies much higher than the machine's speed but is a result of its harmonic behavior. The problem can be primarily identified around 80 Hz. Structural modifications to reduce the problems are also presented.
Style APA, Harvard, Vancouver, ISO itp.
21

Raspanti, Elisa. "Sistemi lineari di curve piane". Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2011. http://amslaurea.unibo.it/2604/.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
22

Dari, Giovanni. "Su alcune curve algebriche piane". Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/6922/.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
23

Acharya, Tanka Prasad Somers Greg Lynn. "Prediction of distribution for total height and crown ratio using normal versus other distributions". Auburn, Ala., 2006. http://repo.lib.auburn.edu/2006%20Fall/Theses/ACHARYA_TANKA_3.pdf.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
24

Powell, David B. "A post-harvest evaluation of mechanized thinning in natural loblolly pine in the coastal plain of Arkansas". Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-09192009-040300/.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
25

Bockino, Nancy Karin. "Interactions of white pine blister rust, host species, and mountain pine beetle in whitebark pine ecosystems in the Greater Yellowstone". Laramie, Wyo. : University of Wyoming, 2008. http://proquest.umi.com/pqdweb?did=1594498141&sid=3&Fmt=2&clientId=18949&RQT=309&VName=PQD.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
26

Yang, Hao. "Diffractive production of pion-f1 in pion-proton interactions at COMPASS (CERN)". Diss., lmu, 2012. http://nbn-resolving.de/urn:nbn:de:bvb:19-150065.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
27

Baissalov, Roustem. "Pion deuteron breakup reaction". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ30441.pdf.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
28

Adams, Thomas P. "Reconstructing Scotland's pine forests". Thesis, University of Edinburgh, 2010. http://hdl.handle.net/1842/4730.

Pełny tekst źródła
Streszczenie:
The Caledonian pinewoods are a habitat of crucial environmental and cultural importance, and the sole home of many rare species. However, they have seen steady decline in recent centuries, through the establishment of hunting estates and forestry plantations. A recent trend in management is the attempted transformation of existing plantations (dense communities with a regular spatial structure and low variance in size and age) towards a state mimicking the perceived natural condition, which has a lower density, irregular spatial pattern, high variance in size and age. This presents a problem for traditional forestry practices, which were conceived primarily with “even-aged” plantation populations in mind. The shift towards management of an uneven-aged structure requires a more in-depth consideration of individual trees’ lifecycles and their effect upon long-term population dynamics. In recent years, great advances in computational and mathematical models for spatially interacting populations have been made. However, certain complications have prevented them from being utilised to their full potential for the purposes of forest management. Forest communities are not only spatially structured; the size of each tree plays a role in its ability to acquire resources for growth and survival. Existing models of population dynamics are discussed, and their extension to incorporate both size- and spatially- structured interactions is presented. The key aspects of populations’ structural development are studied. Data from both plantation and semi-natural Scots Pine stands in Scotland allow parameterisation of a stochastic individual-based model, which in turn provides insights into the behaviour of real populations, and the importance of spatial effects and heterogeneity in individuals. A partial differential equation (moment) approximation to the stochastic model is presented. While this is analytically intractable, numerical integration and heuristic analysis of the equations enable clearer identification of the drivers of population structure. Many results are concordant with existing models of both qualitative forest stand development and theoretical dynamics of spatially-structured populations, while others are specific to joint size-space structure. This deeper understanding of the population dynamics allows robust recommendations for diverse uneven-aged stand management objectives to be made. Approaches to accelerating the transformation of plantation stands towards a “natural” state (using two key operations: thinning – removal of trees, and planting) are investigated. Finally, approaches to so-called “continuous cover forestry” – the practice of maintaining a quasi-natural state while also obtaining economic value from a forest – are also considered. In both cases, the model’s simplicity enables clearer conclusions than would be possible using other approaches.
Style APA, Harvard, Vancouver, ISO itp.
29

Howe, Ethan (Ethan Gabriel Grief). "Simulated pion photoproduction experiments". Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/32903.

Pełny tekst źródła
Streszczenie:
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2005.
Includes bibliographical references (leaf 18).
Introduction: In this paper, I will be assessing the capabilities of the Neutral Meson Spectrometer (NMS) detector in a planned experiment at the High Intensity Gamma Source at Duke University. I will review the relevant theory and set out the importance of this experiment. I will describe the proposed apparatus and how I have modeled it in my simulation. I will explain the data we wish to draw from the experiment and present results as to how well I believe this setup will perform.
by Ethan Howe.
S.B.
Style APA, Harvard, Vancouver, ISO itp.
30

Wilson, Kevin Earl. "Pion absorption on ³He". Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/36007.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
31

Mori, Fernando [UNESP]. "O mecanismo do polo do píon e a perda de energia da SN1987 A". Universidade Estadual Paulista (UNESP), 1992. http://hdl.handle.net/11449/132648.

Pełny tekst źródła
Streszczenie:
Made available in DSpace on 2016-01-13T13:27:29Z (GMT). No. of bitstreams: 0 Previous issue date: 1992. Added 1 bitstream(s) on 2016-01-13T13:31:12Z : No. of bitstreams: 1 000179954.pdf: 1712926 bytes, checksum: 1cdc7955ed3eb57ea723f56deadd37e7 (MD5)
Style APA, Harvard, Vancouver, ISO itp.
32

Mori, Fernando. "O mecanismo do polo do píon e a perda de energia da SN1987 A /". São Paulo : [s.n.], 1992. http://hdl.handle.net/11449/132648.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
33

Dean, Diana K. "Host utilization by the mountain pine beetle, Dendroctonus ponderosae Hopkins (Coleoptera: Scolytidae), in mixed stands of limber pine, Pinus flexilis James, and lodgepole pine, Pinus contorta latifolia Engelmann". Laramie, Wyo. : University of Wyoming, 2007. http://proquest.umi.com/pqdweb?did=1404342031&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
34

Romeo, Diego. "Italiano sullo schermo: Ficarra & Picone". Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/9086/.

Pełny tekst źródła
Streszczenie:
Spesso la comicità non può prescindere dalla lingua di cui si serve, per lo meno quando essa si rende complice della buona riuscita di una battuta, di uno sketch, di un film. E' il caso dei comici Ficarra e Picone, i quali utilizzano con bravura la lingua della propria città per dare corpo alla propria surreale comicità. Analizzare questa lingua, l'italiano regionale di Palermo, è l'obiettivo principale dell'elaborato, che sfrutta la molteplicità di esempi fornita dal film "Il 7 e l'8" (2007) per approfondire gli aspetti linguisticamente più rilevanti nel modo di esprimersi dei due comici e degli altri interpreti che con loro interagiscono.
Style APA, Harvard, Vancouver, ISO itp.
35

Chiatti, Francesco. "Molteplicità dell'intersezione di curve algebriche piane". Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/11455/.

Pełny tekst źródła
Streszczenie:
La tesi si prefigge di definire la molteplicità dell’intersezione tra due curve algebriche piane. La trattazione sarà sviluppata in termini algebrici, per mezzo dello studio degli anelli locali. In seguito, saranno discusse alcune proprietà e sarà proposto qualche esempio di calcolo. Nel terzo capitolo, l’interesse volgerà all’intersezione tra una varietà e un’ipersuperficie di uno spazio proiettivo n-dimensionale. Verrà definita un’ulteriore di molteplicità dell’intersezione, che costituirà una generalizzazione di quella menzionata nei primi due capitoli. A partire da questa definizione, sarà possibile enunciare una versione estesa del Teorema di Bezout. L’ultimo capitolo focalizza l’attenzione nuovamente sulle curve piane, con l’intento di studiarne la topologia in un intorno di un punto singolare. Si introduce, in particolare, l’importante nozione di link di un punto singolare.
Style APA, Harvard, Vancouver, ISO itp.
36

Vosyliūtė, Aušrinė. "Vitaminas E piene ir pieno produktuose". Master's thesis, Lithuanian Academic Libraries Network (LABT), 2013. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2013~D_20130618_094622-60025.

Pełny tekst źródła
Streszczenie:
Darbo tikslas – nustatyti piene ir jo produktuose esantį riebaluose tirpų vitaminą E ir įvertinti jo dinamiką įtakojančius veiksnius bei jų reikšmingumo lygį. Darbo uždaviniai: 1. Mokslinės literatūros apie riebaluose tirpius vitaminus piene ir jo produktuose analizė ir apibendrinimas. 2. Nustatyti piene ir jo produktuose esantį riebaluose tirpų vitaminą E. 3. Įvertinti veiksnius įtakojančius piene ir jo produktuose esančio riebaluose tirpaus vitamino E dinamiką. 4. Nustatyti piene ir pieno produktuose esančio riebaluose tirpaus vitamino E dinamiką įtakojančių veiksnių reikšmingumo lygį. Tirti iš 3 Lietuvoje esančių pieno ūkių paimti pieno mėginiai ir iš šio pieno pagaminti produktai: pasterizuotas pienas, acidofilinis pienas, raugintas pienas, kefyras, grietinėlė, grietinė, sviestas, išrūgos. Prekybos centre tyrimams įsigyti fermentiniai puskiečiai sūriai ir saldintas sutirštintas pienas. Tyrimai atlikti Lietuvos sveikatos mokslų universiteto Lietuvos veterinarijos akademijos biochemijos katedroje ir maisto tyrimų laboratorijoje. Atliktas tiriamojo pieno cheminės sudėties nustatymas. Vitamino E kiekio piene ir pieno produktuose nustatymas didelės skyros skysčių chromatografijos metodu. Išvados: 1. Atlikus vitamino E kiekio tyrimą iš pieno ūkių paimtuose pieno mėginiuose didžiausią vitamino E kiekį nustatėme Lietuvos žalųjų karvių ūkyje vasarą 0,85 mg/kg, žiemą – 0,80 mg/kg. Mažiausią vitamino E kiekį vasaros piene nustatėme mišriame karvių ūkyje 0,72 mg/kg, žiemos... [toliau žr. visą tekstą]
The aim of the work – determine the milk fat–soluble vitamin E, and evaluate the dynamics influencing factors and their significance levels. Objectives: 1. Analysis and generalization of scientific literature about the fat-soluble vitamins in milk and its products. 2. To detect the fat-soluble vitamin E in milk and milk products. 3. To access the factors influencing the fat-soluble vitamin E dynamics in milk and its products. 4. To determine significance of fat-soluble vitamin E dynamics influencing factors in milk and milk products. Milk samples and dairy products from this milk: pasteurized milk, acidophilic milk, acidified milk, kefir, cream, sour cream, butter, were investigated which have been taken from dairy farms in Lithuania. The research was carried out in the Biochemical department of Lithuanian Health Science University Veterinary Academy and laboratory of food analysis; Lithuanian fermented semi-hard cheese and sweetened condensed milk from trade centers were investigated. The chemical composition of milk has been determinated. Vitamin E content in milk and milk products were determinate by high performance liquid chromatography. Conclusions: 1. During examination of vitamin E content in milk from farms, the highest content of vitamin E was found in the third cows farm: at summer 0,85 mg/kg, at winter 0,80 mg/kg. The lowest content of vitamin E at summer was found in the second farm 0,72 mg/kg and the lowest content of vitamin E at winter was found... [to full text]
Style APA, Harvard, Vancouver, ISO itp.
37

Petkevičienė, Diana. "INHIBITORINIŲ MEDŽIAGŲ NUSTATYMO PIENE METODŲ PALYGINIMAS". Master's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140618_233130-42882.

Pełny tekst źródła
Streszczenie:
Magistro baigiamajame darbe tyrimams atlikti naudoti metodai, kurie taikomi tetraciklinų ir β-laktamų grupės antibiotikų likučiams piene nustatyti: Imunofermentinės analizės ELISA; spektrometrijos analizės tyrimas; COWSIDE® II; DELVOTEST®; CHARM BLUE-YELLOW II; ROSA. Spartieji metodai, pvz. COWSIDE II, DELVOTEST, CHARM BLUE-YELLOW II ir ROSA yra pakankamai pigūs, tačiau mažesnio jautrumo ir nenustato tikslios koncentracijos. Lėtesni metodai, pvz. ELISA ir SPEKTROMETRINĖS ANALIZĖS, yra pakankamai brangūs, tačiau pakankamai tikslūs ir galima nustatyti tikslią antibiotikų koncentraciją.
Master's thesis research used methods to determine for tetracycline and β-lactam antibiotics residues in milk: Immunosorbent assay ELISA; spectrometric analysis; COWSIDE ® II; DELVOTEST ®; CHARM BLUE YELLOW-II; ROSA. Quick techniques, such as: COWSIDE II; DELVOTEST, CHARM BLUE YELLOW-II and ROSA are fairly cheap, but a lower sensitivity and does not the exact concentration. Slower methods, eg. ELISA and spectrometric analysis, is expensive enough, but precise enough to determine the exact concentration of antibiotics.
Style APA, Harvard, Vancouver, ISO itp.
38

Ferm, Marcus. "Det digitala livet på en pinne". Thesis, Mittuniversitetet, Institutionen för design, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-36521.

Pełny tekst źródła
Streszczenie:
Svenskar är de som motionerar mest i europa, men samtidigt är svenska barn de mest stillasittande i norden. Barn och ungdomars fysiska aktivitet har minskat med 12-30% sedan år 2000. Detta leder till att de sitter stilla i en allt för stor utsträckning, ibland så mycket som 9h per dag, något som kan medföra vissa hälsorisker. Den främsta orsaken till detta är överkonsumtionen av skärmtid bland barn och ungdomar. Denna studie syftar till att undersöka ungdomars skärmvanor och hur skärmtid kommuniceras visuellt.   Studien baseras på en enkätundersökning och visuell research. Dessa metoder avser att samla in data kring ungdomars rådande skärmvarnor och undersöka hur ett urval mobilapplikationer kom­municera spenderad skärmtid visuellt. Resultatet visar att ungdomar spenderar stora mängder tid vid skärmen dagligen, och att de inte väljer att ta regelbundna pauser under dessa perioder. Resultatet visar även att vissa applikationer som syftar till att hjälpa oss hantera vår skärmtid inte fungerar som effektiva hjälpmedel då den visuell kommunikationen är bristfällig.
Style APA, Harvard, Vancouver, ISO itp.
39

Fries, Megan L. "Relationships between Rooting Restrictions, Radial Growth, and Drought Stress with White Pine (Pinus strobus) Decline in Southern Maine". Fogler Library, University of Maine, 2002. http://www.library.umaine.edu/theses/pdf/FriesML2002.pdf.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
40

Cedervind, Jan. "Impact of pine looper defoliation in Scots pine : secondary attack by pine shoot beetles, tree mortality, top-kill, growth losses, and foliage recovery /". Uppsala : Dept. of Entomology, Swedish Univ. of Agricultural Sciences, 2003. http://epsilon.slu.se/s297.pdf.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
41

Runesson, Ulf Torarind. "Considerations for early remote detection of mountain pine beetle in green-foliaged lodgepole pine". Thesis, University of British Columbia, 1991. http://hdl.handle.net/2429/31483.

Pełny tekst źródła
Streszczenie:
A general review of the mountain pine beetle (Dendroctonus ponderosae Hopkins) - lodgepole pine (Pinus contorta Dougl.) complex, including previous broad-band remote sensing studies aimed at early detection, is provided. The main emphasis of this thesis is on the utility of waveform analysis, based on in-situ spectroscopy, to successfully differentiate between tree canopies experiencing various degrees of stress. Damage to the tree canopies was both beetle-induced and artificial. In support of the spectroscopy, foliar analysis was performed. In addition, for comparative purposes, large-scale color-infrared photographs were both visually interpreted and measured for dye layer densities. Further, airborne digital broad-band data for the same study site were also acquired and analyzed. Despite significant differences in pigmentation levels and moisture status, the analysis showed poor detection success with both the densitometry and visual interpretation of the color-infrared photographs. This is in sharp contrast with previous studies and is concluded to be attributed to the natural variation from year to year and from site to site. The analysis of the digital airborne data resulted in equally poor differentiation between healthy and damaged tree canopies. The main objective of utilizing waveform analysis to take advantage of anticipated pigmentation reductions in stressed trees yielded very positive results. There were significant blue-shifts in the red-edge positions of currently attacked tree canopies. The data suggest that in a situation where conventional detection means such as those based on photo sensitivity fail, a suitable red-edge threshold can be determined from attacked trees and used to successfully differentiate healthy from currently attacked lodgepole pines.
Forestry, Faculty of
Graduate
Style APA, Harvard, Vancouver, ISO itp.
42

Surya, Yohanes. "A relativistic model of pion nucleon scattering and pion photoproduction on a single nucleon". W&M ScholarWorks, 1994. https://scholarworks.wm.edu/etd/1539623861.

Pełny tekst źródła
Streszczenie:
Pion nucleon scattering is described by a manifestly covariant wave equation in which the pion is restricted to its mass-shell. The kernel of the equation includes nucleon (N), Roper (N*), delta ({dollar}\Delta{dollar}) and {dollar}D\sb{lcub}13{rcub}{dollar} poles, with their corresponding crossed pole terms approximated by contact interactions, and contact {dollar}\sigma{dollar}- and {dollar}\rho{dollar}-like exchange terms. The {dollar}\pi NN{dollar} vertex is treated as a mixture of {dollar}\gamma\sp5{dollar} and {dollar}\gamma\sp\mu\gamma\sp5{dollar} coupling, with a mixing parameter {dollar}\lambda{dollar} chosen so that the dressed nucleon pole will be unshifted by the interaction. Chiral symmetry is maintained at threshold. The resonance contributions are fully unitarized by the equation, with their widths determined by the dynamics included in the model. The {dollar}\Delta{dollar} and {dollar}D\sb{lcub}13{rcub}{dollar} are treated as a pure spin 3/2 particles, with no spin 1/2 amplitude in the S-channel. Pion photoproduction is also described by a manifestly covariant wave equation, which includes a treatment of the final state {dollar}\pi N{dollar} interactions consistent with the covariant, unitary, resonance model of {dollar}\pi N{dollar} scattering. The model is exactly gauge invariant to all orders in the strong coupling, g and satisfies the Low Energy Theorem. Unitarity is maintained up to first order in the charge e (Watson theorem). The complete development of the model which gives a good fit to all the data up to 770 MeV photon energy lab, is presented.
Style APA, Harvard, Vancouver, ISO itp.
43

Métivet, Thibaut. "Lattice QCD at the physical point : pion-pion scattering and structure of the nucleon". Thesis, Paris 11, 2015. http://www.theses.fr/2015PA112243/document.

Pełny tekst źródła
Streszczenie:
La Chromodynamique Quantique (QCD) sur réseau permet d'étudier de façon ab-initio et non-perturbative les processus d'interaction forte. Ce formalisme, qui permet une régularisation covariante de la théorie de l'interaction forte, fournit aussi un cadre naturel pour le calcul et la simulation numérique de la Chromodynamique Quantique. Dans cette thèse, après un tour d'horizon des principales propriétés de la QCD et une présentation détaillée de notre discrétisation de cette théorie sur un réseau, nous étudions de façon approfondie deux problèmes de physique hadronique : le phénomène de diffusion résonante et la structure du nucléon. Les calculs sont réalisés avec les configurations de jauge de la Collaboration Budapest-Marseille-Wuppertal, générées avec une action de Wilson améliorée avec 2+1 saveurs de quarks dynamiques. Elles couvrent une large gamme de pas de réseau, de volumes et de masses des quarks différents, permettant ainsi une étude fine de la sensibilité de nos résultats à ces paramètres, et fournissant un bon contrôle sur l'extrapolation au continu. Notre étude de la diffusion de particules sur le réseau est menée grâce à une méthode proposée par M. Lüscher. Nous avons choisi le cas particulier de la diffusion pion-pion dans le canal résonant du méson rho, et analysé nos données avec une méthode variationnelle aux valeurs propres généralisées. Nous présentons les déphasages pion-pion ainsi que les paramètres de la résonance obtenus de façon détaillée, tout en garantissant un bon contrôle de nos erreurs systématiques. Nos résultats apportent une avancée importante dans le panorama des études de diffusion sur le réseau car ce sont les premiers réalisés à la masse physique du pion, pour laquelle la désintégration du rho en deux pions peut effectivement avoir lieu. Les valeurs obtenues pour les paramètres de la résonance du méson rho sont accord avec l'expérience, et confirment la faible dépendance du couplage entre le rho et les deux pions à la masse du pion. L'exploration de la structure du nucléon se fait à travers un calcul complet des facteurs de forme électrofaibles isovectoriels, avec une étude approfondie du rayon de charge électrique et de la charge axiale. Notre analyse présente aussi des données à la masse physique du pion, ce qui s'avère crucial pour maîtriser les extrapolations au point physique, étant données les variations violentes prédites par la perturbation chirale de ces quantités. Notre calcul utilise une projection sur les états du nucléon à la source et au puits, et une méthode de fit combinant les fonctions de corrélation à deux et trois points afin de réduire et de contrôler au maximum les contaminations pouvant venir des états excités. Bien que davantage de données seraient nécessaires pour déterminer très précisément le rayon et la charge axiale au point physique avec une évaluation pertinente des erreurs systématiques, les valeurs que nous obtenons sont en bon accord avec l'expérience, et suggèrent que les effets dus aux états excités sont faibles et sous contrôle. Notre analyse souligne aussi que l'utilisation de configurations de jauge avec des masses de pion proches de la valeur physique et avec des grands volumes semble indispensable à une étude précise de la structure du nucléon sur réseau
The formalism of Quantum Chromodynamics on the lattice (or Lattice QCD) allows to perform ab-initio non-perturbative studies of strong-interaction driven processes, as it provides both a covariant regularisation of the theory of QCD and a natural framework for numerical computations. In this work, after a review of the main features of QCD and a step-by-step presentation of our discretization of QCD on a lattice, we undertake detailed studies of two problems of hadronic physics: the phenomenon of resonant scattering and the structure of the nucleon. The lattice calculations are performed with the Budapest-Marseille-Wuppertal Collaboration's 2+1-flavour gauge configurations, which give access to a wide range of lattice spacings, volumes and quarks masses, thereby allowing to study the sensibility of our results on these parameters, and to perform a complete continuum extrapolation. These configurations include dynamical quarks, and use a clover-improved Wilson QCD action. To investigate the scattering of particles on the lattice, we set up a Lüscher analysis for the emblematic case of pion-pion scattering in the channel of the rho meson resonance. We analyse our data with a variational generalized eigenvalue method, and give an in-depth calculation of the scattering phase-shifts and the corresponding resonance parameters, with a full control of the systematic errors. Our results provide an important step for lattice studies of scattering states, as they are the first to be performed at the physical pion mass, where one can see the actual decay of the rho into two pions. The obtained rho meson parameters are in good agreement with the experimental values, and consistent with a weak pion mass dependence of the coupling between the rho and two pions. As for our probe of the structure of the nucleon, we present a complete extraction of the electroweak isovector form factors, with a comprehensive study of the electric charge squared radius and of the axial charge. Our analysis also feature data at the physical pion mass, which turns out to be crucial in order to perform safe extrapolations to the physical point, as the chiral perturbation theory predicts violent variations of these quantities near the massless-quarks point. Our calculation includes source and sink projections onto the nucleon state, as well as a combined fit method between the two-point and three-point correlation functions to control the contamination of our data by excited states. Although one would need more data to perform a high-accuracy determination of the nucleon radius and axial charge at the physical point with a relevant estimation of the systematic errors, the results we obtain are in good agreement with the experiment and suggest that the excited-state effects are under control. Our analysis also highlights that gauge configurations ensembles near the physical pion mass and with large volumes must be used in order to extract accurate information about the nucleon structure from lattice calculations
Style APA, Harvard, Vancouver, ISO itp.
44

Braun, David M. "Host colonization behavior of the mountain pine beetle (Dendroctonus ponderosae Hopkins) in thinned and unthinned stands of second-growth ponderosa pine (Pinus ponderosa Laws.) /". Thesis, Connect to this title online; UW restricted, 1998. http://hdl.handle.net/1773/5482.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
45

Sugita, Michiaki. "Evaporation from a pine forest". Ibaraki, Japan : Environmental Research Center, the University of Tsukuba, 1987. http://catalog.hathitrust.org/api/volumes/oclc/17857035.html.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
46

Rost, Matthias. "Strahlungsbegleitete Pion-Photoproduktion am Proton". [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=975912267.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
47

Noble, Anthony James. "Pion transfer in gaseous hydrogen". Thesis, University of British Columbia, 1986. http://hdl.handle.net/2429/26016.

Pełny tekst źródła
Streszczenie:
The experiment consisted of stopping negative pions in a high pressure gas target to measure the transfer rate π-p → π-d in mixtures of H2, D2 and HD gas. The gamma rays from the decay of the π ⁰ in π -p → n + π ⁰ were detected in coincidence using two large sodium iodide crystals. The probability that a pion be transferred to a deuteron from a pionic hydrogen complex was described in terms of a phenomenological model parameterized by B and ∧. Fits to the data yielded B = 0.77 ±0.14 and ∧ = 0.21 ±0.04. These values implied that the hydrogen capture ratio in an equal mix of H2 and D2 was F(H₂D₂) = 0.45 ±0.01. The capture ratio for HD was measured to be F(HD) = 0.355 ±0.021. The ratio F(H₂D₂)/F(HD) indicated that there was likely to be internal transfer in the breakup of π-HD favouring the π-d complex at about a 60% level.
Science, Faculty of
Physics and Astronomy, Department of
Graduate
Style APA, Harvard, Vancouver, ISO itp.
48

Brasted, Charles. "The pion nucleon sigma term /". Title page, contents and abstract only, 1995. http://web4.library.adelaide.edu.au/theses/09SM/09smb823.pdf.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
49

Scully, Daniel I. "Neutrino induced coherent pion production". Thesis, University of Warwick, 2013. http://wrap.warwick.ac.uk/58892/.

Pełny tekst źródła
Streszczenie:
Neutrino-induced coherent pion production is an important channel for the study of neutrino-nucleus interactions. It is both a dangerous background for νe oscillation experiments, and a critical component required for precise understanding of neutrino-nucleus pion production in general. The body of experimental evidence for coherent pion production at high neutrino energies is reviewed. This data is described well by the Rein-Sehgal model, which is described and studied. In light of recent low energy limits set below the Rein-Sehgal model cross-section an alternative low energy model, the Alvarez-Ruso model, was implemented in the neutrino interaction simulation GENIE. The results of this simulation are compared with those from the Rein-Sehgal model, and briefly with those from other models. Finally, a search for νμ-induced charged-current (CC) coherent pion production on 12C was conducted at a mean neutrino energy of 0.86 GeV, using data from the T2K experiment's off-axis near detector. A 3.0 σ excess of events was found above the background prediction, constituting the first experimental evidence of CC coherent pion production below 7 GeV. Preliminary attempts to interpret this excess in the context of the Rein-Sehgal and Alvarez-Ruso models found cross-sections consistent with the limits set by SciBooNE.
Style APA, Harvard, Vancouver, ISO itp.
50

Wiedenbeck, Janice K. "Shrinkage characteristics of lodgepole pine". Thesis, Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/53198.

Pełny tekst źródła
Streszczenie:
This study examined shrinkage and related characteristics of two North American varieties of lodgepole pine: Pinus contorta var. latifolia and Pinus contorta var. murrayana, sampled at 10% of tree height. For var. murrayana, size was the only factor that had a significant effect on specific gravity; specific gravity decreased with increasing tree diameter. For var. Iatifolia, latitude was the only factor that had a significant effect on specific gravity; in general, specific gravity increased with increasing latitude. Conversely, specific gravity had a significant effect on radial shrinkage, the radial shrinkage tangential shrinkage ratio, and volumetric shrinkage for both varieties. The analysis of variance procedure indicated that the factors size, latitude, and elevation had no effect on the shrinkage of var. Iatifolia. However, for var. murrayana, radial shrinkage was affected by both tree size and latitude. Tangential shrinkage was also affected by latitude (increasing with increasing latitude). Linear correlations between radial shrinkage and growth rate, longitudinal shrinkage and distance I from the pith (a negative relationship), and specific gravity and growth rate were highly significant for both varieties. For var. Iatifolia, the linear association between specific gravity and heartwood percent was also significant. For var. murrayana, no difference in shrinkage or specific gravity was detected between the heartwood and sapwood. For var. Iatifolia, heartwood shrank less radially and had a lower specific gravity than sapwood. A comparison of the two varieties at their common latitudes indicated that murrayana trees have both higher specific gravity and shrinkage than do Iatifolia trees of the same size.
Master of Science
Style APA, Harvard, Vancouver, ISO itp.
Możesz być także zainteresowany bibliografiami na temat „Pione” dla innych typów źródeł:
Artykuły w czasopismach Książki
Oferujemy zniżki na wszystkie plany premium dla autorów, których prace zostały uwzględnione w tematycznych zestawieniach literatury. Skontaktuj się z nami, aby uzyskać unikalny kod promocyjny!

Do bibliografii