To see the other types of publications on this topic, follow the link: Anatomical and morphological structure.
Dissertations / Theses on the topic 'Anatomical and morphological structure'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Anatomical and morphological structure.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Almotiri, Jasem. "A Multi-Anatomical Retinal Structure Segmentation System for Automatic Eye Screening Using Morphological Adaptive Fuzzy Thresholding." Thesis, University of Bridgeport, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10975223.
Full textAbstract:
<p> Eye exam can be as efficacious as physical one in determining health concerns. Retina screening can be the very first clue to detecting a variety of hidden health issues including pre-diabetes and diabetes. Through the process of clinical diagnosis and prognosis; ophthalmologists rely heavily on the binary segmented version of retina fundus image; where the accuracy of segmented vessels, optic disc and abnormal lesions extremely affects the diagnosis accuracy which in turn affect the subsequent clinical treatment steps. This thesis proposes an automated retinal fundus image segmentation system composed of three segmentation subsystems follow same core segmentation algorithm. Despite of broad difference in features and characteristics; retinal vessels, optic disc and exudate lesions are extracted by each subsystem without the need for texture analysis or synthesis. For sake of compact diagnosis and complete clinical insight, our proposed system can detect these anatomical structures in one session with high accuracy even in pathological retina images. </p><p> The proposed system uses a robust hybrid segmentation algorithm combines adaptive fuzzy thresholding and mathematical morphology. The proposed system is validated using four benchmark datasets: DRIVE and STARE (vessels), DRISHTI-GS (optic disc), and DIARETDB1 (exudates lesions). Competitive segmentation performance is achieved, outperforming a variety of up-to-date systems and demonstrating the capacity to deal with other heterogenous anatomical structures. </p><p>
2
Munro, Sioban Lucille. "A morphological-anatomical classification of growth forms in monocotyledons." Doctoral thesis, University of Cape Town, 2000. http://hdl.handle.net/11427/6142.
Full textAbstract:
Bibliography: leaves 334-355.<br>This thesis examines the morphology and anatomy of monocots from the standpoint of both taxic and growth form diversity and attempts to address the problems encountered in classifying and naming the structures which comprise the axial system of monocots. The morphology and anatomy of the growth habits of a variety of monocots were described using standard sectioning and light microscope procedures.
3
Holm, Hannes. "Hereditary non-polyposis colorectal carcinoma (HNPCC) : morphological and immunohistochemical studies." Master's thesis, University of Cape Town, 2005. http://hdl.handle.net/11427/3079.
Full textAbstract:
Includes bibliographical references.<br>Families with hereditary non-polyposis colorectal carcinoma (HNPCC) are not uncommon along the West-Coast of South Africa. These patients present with early onset carcinomas mostly colorectal, predominantly in the right colon. They may develop tumours of other organs, including uterus, breast, stomach and skin. To evaluate and compare the microscopic characteristics of three groups of colorectal carcinomas (HNPCC, early onset colorectal carcinomas and sporadic colorectal carcinomas). 2. To determine the features most characteristic of the group.
4
De, Klerk Willouw. "A study of morphological, immunohistochemical and histochemical features of ampullary carcinomas." Master's thesis, University of Cape Town, 2005. http://hdl.handle.net/11427/3075.
Full textAbstract:
Includes bibliographical references (leaves 66-75).<br>The aim of the first study was to examine clinical, histopathological and immunohistochemical features of ampullary carcinomas and to determine whether any of these features had significant prognostiC value. The immunohistochemical panel was selected after a literature review and included p53, Ki-67, MUC1, MUC1core, MUC2 and CA 19.9. The data was analyzed by multivariate analysis.
5
Diane, Nadja. "Systematic analysis of the Heliotropiaceae based on molecular and morphological-anatomical data." [S.l. : s.n.], 2003. http://www.diss.fu-berlin.de/2003/197/index.html.
Full text
6
Zverkova, Julija. "Augavietės poveikis paprastosios kiaulpienės (Taraxacum officinale F. H. Wigg.) anatominei ir morfologinei sandarai." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2005. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2005~D_20050604_191729-42835.
Full textAbstract:
In this work habitats impact to dandelion´s anatomic and morphologic state.
Dandelion´s leaf is dorsoventral, bifaciral type. Mesophyll habitat epidermal cells are izodeometric, waved, whereas in the higrophyll – slightly waved and extended in tangential direction. Mesophyll habitat epidermal cells´ number is bigger than in the higrophyll. In the mesophyll habitat on the upper epidermal cells´ number is 85,4, on the lower – 87,2 per 1 mm², accordingly in the higrophyll habitat – 79,3 and 82,4 per 1 mm². Stomata apparatus per 1mm² are more in the higrophyll habitat (on the upper lamina´s side there were 20,2, on the lower – 24,9 stomata apparatus), than in the mesophyll (on the upper lamina´s side there were 14,8, on the lowe – 19,5 stomata apparatus). In the mesophyll habitat upper lamina´s side stomata´s coefficient was 19,36% and 45,57%.
Dandelion´s leafstalk is ivugularly – shaped trapezium. In the mesophyll habitat – double, in the higrophyll – single, air spaces´ diameter – 1056 ��. In the lamina´s epidermis the stomata apparatus is not found neither on the upper, nor on the lower side. Dandelion´s leafstalk is represented by tabular collenchyma. In the leafstalk´s parenchyma articulate communicating latex vessel are situated.
Investigated on the Taraxacum officinale, wich is growing in the mesophyll and higrophyll habitats, anatomic state of radix is definited that changing habitat the anatomic state of radix shifts a little bit. Independent of habitat radix is... [to full text]
7
Buisson, Daniel Joseph. "Anatomical and morphological responses of papaya, Carica papaya L., to various light conditions." FIU Digital Commons, 1991. http://digitalcommons.fiu.edu/etd/1817.
Full textAbstract:
Plants that develop under foliar shade encounter both low photosynthetically active radiation (PAR) and low red to far red ratios (R:FR). Both of these factors are important in determining developmental responses to shade. Papaya (Carica papaya L.) seedlings grown under filtered shade (low PAR and low R:FR) were compared with seedlings grown under neutral shade (low PAR with R:FR similar to that of full sunlight), and high light (moderate PAR with R:FR similar to that of full sunlight). The results indicated that papaya exhibits a light seeking strategy as evidenced by morphological and anatomical differences between treatments. Based on past research the results also indicate shade developmental responses in papaya to be phytochrome mediated.
8
Hather, Jonathan G. "The morphological and anatomical interpretation and identification of charred vegetative parenchymatous plant remains." Thesis, University College London (University of London), 1988. http://discovery.ucl.ac.uk/1349599/.
Full textAbstract:
This research project has attempted to develop a methodology for the identification of charred remains of useful non-woody vegetative parts of plants by the use of morphological and anatomical characters. A large number of taxa have been observed covering a wide morphological, anatomical, ethnographic and taxonomic range. The chosen taxa cover a geographic area from Western Europe, through the Mediterranean to the Near East. Anatomy of fresh material viewed under the light microscope has been used to interpret the anatomy of experimentally charred tissues viewed under the Scanning Electron Microscope. Classical morphological and anatomical characters have been used as well as artifactual characters caused by charring. Literature covering root and tuber domestication and the exploitation of roots and tubers as wild resources are reviewed. The origins of root crops in Europe and the Near East is discussed and compared with the origin of root and tuber crops in the tropics. The application of morphological terms such as rhizome, rootstock and corm as well as the use of anatomical and morphological characters of the tissues under observation for classification and identification are discussed. The results first describe the characters of charred non-woody vegetative tissue, so that in the separate descriptions of the charcoal each taxon that follows the morphology and anatomy may be interpreted. Those characters that are diagnosed are indicated. Archaeological charcoal that has been analysed is also described. The results are discussed with a view to methods of identification of parenchymatous tissues and a manual dichotomous key is presented. Applications of the research are examined. Finally a list of concluding points is put forward.
9
Randall, Janet H. "Morphological structure and language acquisition." New York : Garland, 1985. http://catalog.hathitrust.org/api/volumes/oclc/12237695.html.
Full text
10
Lavriv, I. P. "The anatomical features of the parotid gland structure." Thesis, БДМУ, 2022. http://dspace.bsmu.edu.ua:8080/xmlui/handle/123456789/19324.
Full text
11
Mostert, Colin. "The diversity of malignant rhabdoid tumours : a morphological, immunohistochemical and ultrastructural review of cases from the Red Cross Children's Hospital and Groote Schuur Hospitals." Master's thesis, University of Cape Town, 1997. http://hdl.handle.net/11427/26788.
Full textAbstract:
Malignant rhabdoid tumours of the kidney are rare childhood neoplasms. Extra-renal rhabdoid tumours are known to have a distinctive biological behaviour and do not always occur in the paediatric age group. As the histogenesis of rhabdoid tumours, and their apparent relationship to nephroblastoma is still unclear, careful assessment of new cases is required. This investigation illustrates diverse ultrastructural, light microscopic and immunohistochemical findings. These features are related to each other and to the biological behaviour of renal rhabdoid tumours, and six extra-renal lesions with rhabdoid features obtained from the Pathology Archives of the Red Cross Children's Hospital and Groote Schuur Hospital. In this series primitive epithelial elements are a dominant feature, but ultrastructural features of one renal rumour suggest diverse differentiation. The extra-renal lesions investigated include three undifferentiated rhabdoid lesions, a primitive neuro-ectodermal tumour, a malignant epithelioid Schwannoma and a possible undifferentiated hepatocellular carcinoma; all showing areas of extensive rhabdoid differentiation. Pseudo-rhabdoid cells in an additional two cases were also examined. These particular tumours were a nephroblastoma and a fibro-lamellar carcinoma of the liver. These rhabdoid tumour mimics were ultrastructurally different from true rhabdoid cells. Strong immunohistochemical co-expression of Vimentin and cytokeratin in rhabdoid tumour cell inclusions has been noted by previous investigators. (Vogel, 1984) (Gansler, 1991), (Berry, 1992). We speculate that the predominant line of differentiation in renal rhabdoid tumours is epithelial although, as in nephroblastoma multiple lines of differentiation may occur. The extra-renal lesions appear to represent more than one entity, but once again epithelial or neuro-epithelial differentiation appears to be present. Ultrastructural examination is a more useful investigation than immunohistochemistry because of inherent non-specific uptake of antibodies by the filamentous cytoplasmic inclusions.
12
TysonMayer, Kilian. "A Morphological and Anatomical Investigation of Shoot Apical Meristems Expressing Ring Fasciation in Clarkia tembloriensis." Miami University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=miami1574731415182166.
Full text
13
Kemzūraitė, Renata. "Augavietės poveikis blizgės (Lunaria L.) morfologinei ir anatominei sandarai." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2004. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2004~D_20040608_172831-47960.
Full textAbstract:
The master thesis contains anatomical – morphological description of axial parts, normally steams, rhizomsteams and leaves, of Lunaria rediviva L., Lunaria annua L. All investigated parts contains (heterobathmy). Steams and rhizomsteams contain glands of shizogenical origin, but roots do not have it. Impact of vegetation conditions to anatomical – morphological texture of mezohygrophites was investigated. In creah (humid habital) hygromorphical characteristics were revealed: - more space among the cells were found and the were bigger; - less amount of supporting tissues; - wolls of the were less warred; - relatively less atomata in a measurement. In a terrace (dry habital) kseromorphical characteristics were revealed: - cells of the supporting tissues were more solid and there bigger quantity of them; - epidermal cells were smaller but wolls the cells were more warred; - the type stoma apparatus and amount of stomata in a measurement. Circulating tissues in steams of Lunaria rediviva were changing are arranged in fascicular type, in rhizomesteams in non – fascicular type. Size of circulating tissues varies depending on habital. Medulles rays are heteroghenical, composed by 2 – 5 cells rows.
14
Carvalho, Giorgia Borges de. "Estudo dos sinais anatômicos em íris humana com finalidade de pintura da íris em prótese ocular." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/23/23144/tde-22042008-123028/.
Full textAbstract:
A devolução da estética em prótese ocular está diretamente relacionada ao conhecimento da anatomia e morfologia da íris humana, e uma pintura da íris mais fiel será decorrente de uma boa determinação e reprodução dos sinais anatômicos presentes na íris remanescente do paciente. Nesta pesquisa, foi realizado um estudo dos sinais anatômicos presentes em ambas as íris do globo ocular de 112 indivíduos escolhidos aleatoriamente, através de imagens fotográficas digitais. Foram elaboradas tabelas de avaliação dos sinais: lacunas, anéis de tensão,radiis solaris, sulcos radiais, manchas, flocos de neve, nuvens e anel de gordura, verificando a freqüência com que os mesmos aparecem nas íris consideradas de cor escura (castanho, castanho claro e castanho escuro); de cor clara (azul, verde e cinza) e de média (hazel e âmbar). Os dados obtidos foram processados em análise estatística, através do Teste Exato de Fisher e qui quadrado em nível de significância de 5%. Os resultados mostraram que: os sinais anatômicos são menos evidentes nas íris de cor escura, sendo que, as lacunas e os anéis de tensão foram os mais observados e as nuvens não foram observadas. Nas íris de cor clara, os sinais mais observados foram as manchas e os flocos de neve e o anel de gordura não foi observado. As íris de cor média foram as que apresentaram maior variedade de sinais, prevalecendo os anéis de tensão e as lacunas, e os menos freqüentes foram as nuvens e o anel de gordura. O sinal anel de gordura foi observado apenas em indivíduos em idade superior a 50 anos. Por fim, verificou-se também, que as íris direita e esquerda do mesmo indivíduo são similares, mas não iguais, havendo pequenas alterações na quantidade do mesmo sinal presente em ambas.<br>The devolution of the aesthetics in ocular prosthesis is directly related to the knowledge of the anatomy and morphology of the iris, and a painting of the most fidelity iris will be due to a good determination and reproduction of the present anatomical signs in the patient\'s remaining iris. In this research, the study of the anatomical signs was accomplished in 112 individuals\' human iris, analyzing the right and left irises, through images of digital pictures. Tables of evaluation were created of the signs: tension rings, lacuna, clouds, cholesterol ring, radiis solaris, snow flakes (lymphatic rosary), spots and spastic furrows and later verified the frequency with that the same ones appear in the irises of color blue, green, gray, hazel, amber, brown colors (brown, dark brown and light brown). The sequence of obtained data was processed in statistical analysis, and the results showed that the signs that more they appeared were the lacuna, stress ring and radiis solaris, and the anatomical signs that fewer appeared in the human iris were snow flakes (lymphatic rosary), clouds and cholesterol ring, however the signs of the type cholesterol rings presented the characteristic of being related the patient\'s age (above 50 years). The irises of color amber and hazel were the ones that presented the largest variety of anatomical signs. Already in the irises of brown color (dark brown, brown and light brown), the signs as a whole is less evident. Finally the same individual\'s right and left irises are similar and no same, suffering alteration in the amount of the same sign presented in both.
15
Dempsey, Matthew Anthony. "Anatomical and Morphological Responses of Cardiospermum Halicacabum L. (Balloon Vine), to Four Levels of Water Availability." Thesis, University of North Texas, 2011. https://digital.library.unt.edu/ark:/67531/metadc67974/.
Full textAbstract:
C. halicacabum (Sapindaceae) is an invasive plant that is considered a nuisance species in Texas riparian environments. Little is known of the tolerance of C. halicacabum to flooding and drought; however, this information may provide insight into the characteristics that contribute to C. halicacabum purported invasiveness. C. halicacabum seedlings (n = 92) were exposed to one of four levels of water availability (flooded, saturated, intermediate and dry) over six weeks under greenhouse conditions. Plant performance was affected by water availability; however, there was no effect on survivorship. Flooded and saturated plants exhibited morphological adaptations; producing adventitious roots, hypertrophy, and aerenchyma tissue. Morphological measures, anatomical responses, and patterns of biomass allocation all indicate that C. halicacabum is able to survive periodic inundation, perform in saturation, and establish and thrive on the drier end of a moisture gradient.
16
Meier, Dominik Simon. "Structure-driven image-warping for anatomical labeling of the human brain /." The Ohio State University, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=osu148820217119762.
Full text
17
Noyer, Robert Rolf. "Features, positions and affixes in autonomous morphological structure." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/12895.
Full text
18
Zhai, Shengcheng. "Anatomical and mechanical features of palm fibrovascular bundles." Kyoto University, 2013. http://hdl.handle.net/2433/180521.
Full textAbstract:
Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第17904号<br>農博第2027号<br>新制||農||1018(附属図書館)<br>学位論文||H25||N4800(農学部図書室)<br>30724<br>京都大学大学院農学研究科森林科学専攻<br>(主査)教授 杉山 淳司, 教授 矢野 浩之, 教授 髙部 圭司<br>学位規則第4条第1項該当
19
Crole, Martina Rachel. "A gross anatomical and histological study of the oropharynx and proximal oesophagus of the emu (Dromaius novaehollandiae)." Diss., University of Pretoria, 2009. http://hdl.handle.net/2263/24625.
Full textAbstract:
This study describes the gross anatomical, histological and surface morphological features of the oropharynx and proximal oesophagus of the emu in order to address the scarcity of information on this region in this commercially important bird. Heads obtained from birds at slaughter (and a younger and older bird from emergency farm slaughter) were used for this study and described using basic gross anatomical and histological techniques, supplemented by scanning electron microscopy. The findings of the study were compared with the relevant literature. The oral and pharyngeal cavities could not be morphologically separated and formed a single cavity. This cavity was dorso-ventrally flattened and clearly divided, both on the floor and the roof, into rostral pigmented and caudal non-pigmented parts. The non-pigmented floor housed the tongue and laryngeal mound which had a wide glottis and no papillae. The choana was triangular-shaped, with a small caudo-lateral fold on either side, and was situated in the nonpigmented part of the roof. Caudal to the choana were two rounded pharyngeal folds with a pitted ventral surface. A small bilateral projection from the caudo-lateral edge consisted mainly of diffuse lymphoid tissue. The pharyngeal folds contained numerous large simple branched tubular mucus-secreting glands as well as large accumulations of lymphoid tissue. The pigmented regions of the roof and floor were aglandular and lined by a keratinised stratified squamous epithelium which, particularly in the roof, contained numerous Herbst corpuscles in the underlying connective tissue. SEM revealed the surface to be composed of sheets of desquamating flattened polygonal cells. The non-pigmented regions were glandular and lined by a non-keratinised stratified squamous epithelium. Surface cells displayed a pattern of microplicae or microvilli while individual surface cells were seen to desquamate. The connective tissue housed small, simple tubular and large, simple branched tubular mucus-secreting glands, Herbst corpuscles (only absent from the pharyngeal folds and proximal oesophagus), lymphoid tissue, blood vessels and nerves. The glands of the upper digestive tract were polystomatic and named as follows according to their location: Caudal intermandibular, lingual, crico-arytenoid, oral angular, caudal palatine, pharyngeal and oesophageal. The openings of the glands to the surface were seen on SEM as variably sized holes on the surface, some being obscured by mucus secretions from the underlying glands. Taste receptors were sparse and present only in the caudal non-pigmented oropharyngeal floor, tongue root and proximal oesophagus. Accumulations of lymphoid tissue were identified at the junction between the two regions of the roof, and in the non-pigmented roof, the non-pigmented floor, tongue ventrum, root and frenulum, proximal oesophagus and pharyngeal folds. The consistent dense accumulation of lymphoid tissue in the pharyngeal folds constituted pharyngeal tonsils (Lymphonoduli pharyngeales). The lymphoid tissue of the non-pigmented floor was visible macroscopically as round raised nodules. Specific, unnamed larger lymphoid tissue aggregations were located at the junction of the tongue ventrum and frenulum and in the small folds lateral to the choana. Surface morphology, as seen by SEM, revealed a pattern of microridges on the surface cells of the keratinised areas, whereas the surface cells of the non-keratinised areas displayed microplicae, microvilli and cilia. Microvilli and cilia were associated with the gland openings and ducts. The proximal oesophagus was a cylindrical tube with a longitudinally folded mucosa and displayed the typical tissue layers described in birds. The mucosa was formed by a nonkeratinised stratified epithelium which on SEM showed minimal surface desquamation. The lamina propria contained numerous simple tubular mucus-secreting glands which sometimes branched and occasional diffuse lymphoid tissue aggregations. The gland openings to the surface were seen on SEM as small and large dark holes. The muscularis mucosae was very prominent and was a longitudinal smooth muscle layer separating the mucosa from the submucosa. The tunica muscularis was composed of a thicker inner circular and a thinner outer longitudinal smooth muscle layer surrounded by the outer loose connective tissue forming the tunica adventitia. The emu tongue was divided into a body and a root. The body was triangular, dorso-ventrally flattened, pigmented and displayed caudally directed lingual papillae on both the lateral and caudal margins. The root, a more conspicuous structure in comparison to other ratites, was triangular, with a raised bulbous component folding over the rostral part of the laryngeal fissure. The lingual skeleton was formed by the triangular-shaped paraglossum (hyaline cartilage), forming the core of the tongue body, and the rostral projection of the basihyale, ventral to the paraglossum. Following the general trend in ratites, the emu tongue was greatly reduced in comparison to the bill length and specifically adapted for swallowing during the cranioinertial method of feeding employed by palaeognaths. The tongue was invested by a non-keratinised stratified squamous epithelium. The glands in the connective tissue formed the bulk of the parenchyma and were composed of both small simple tubular and large simple branched tubular mucus-secreting glands similar to those seen in the oropharynx. The lingual glands were grouped as follows: dorsal and rostro-ventral (large glands), caudo-ventral and radical (large and small glands) and frenular (small glands). The large glands were visible macroscopically as doughnut-shaped structures. Melanocytes were absent from the tongue ventrum and occasionally from the tongue root. Lymphoid tissue was absent from the tongue dorsum. Herbst corpuscles were present in the tongue body and root and generally closely associated with the large mucus-secreting glands. The surface morphology varied in the different regions of the tongue. The dorsal and rostro-ventral tongue body showed individual desquamating cells and large gland openings only, the caudo-lateral ventrum showed less desquamation and both large and small openings. The mid-ventral aspect had an undulating uneven appearance with round raised cells on the surface which were densely packed with microvilli. Very large, large and small openings were present in this region and ciliated cells occurred in the vicinity of gland openings. This study presented various unique findings regarding the morphology of the emu oropharynx compared to other ratites. Although the sense of taste has been confirmed in many avian species, this study presented the first evidence of taste in the emu and ratites in general and suggests the possibility of taste being previously overlooked in the other birds studied (ostrich and greater rhea). The tongue root of the emu was clearly defined and is unique in structure and possible function amongst the ratites and other birds. Previously unmentioned functions of the emu tongue revealed by this study include: touch (Herbst corpuscles), taste (taste bud), lubrication and mechanical protection (mucus-secreting glands), immunological (lymphoid tissue) and digestive (swallowing). It was also noted that the various structures and organs of the oropharynx revealed important and often interesting differences between the emu and the other ratites documented. The prominent serrations of the rostral mandibular tomia of the emu also appear to be unique amongst ratites. The presence and wide distribution of Herbst corpuscles within the emu oropharynx and tongue show these areas to be highly sensitive to touch. The caudo-lateral projections of the pharyngeal folds effectively formed pharyngeal tonsils, a feature not apparent in other ratites. Despite the differences noted between the emu and other ratites it was possible to discern a common pattern of structures and features, with their modifications, both within and forming the oropharynx in this group of birds.<br>Dissertation (MSc)--University of Pretoria, 2009.<br>Anatomy and Physiology<br>unrestricted
20
De, Silva Margherita <1989>. "Gross and Microscopic Morphological Anatomical Study of the Guinea Pig (Cavia porcellus) and the Capybara (Hydrochoerus hydrochaeris), Aimed at the Preparation of a Comparative Anatomical Atlas of the Different Systems." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2022. http://amsdottorato.unibo.it/10467/1/Tesi%20dottorato%20Margherita%20De%20Silva%20XXXIV%20ciclo.pdf.
Full textAbstract:
In recent years, there has been an exponential increase in the so-called “new pets”, including the domestic guinea pig (Cavia porcellus) and the capybara (Hydrochoerus hydrochaeris), two closely related Caviid rodents native to South America. Both historically bred for food purposes, they have more recently become increasingly popular as pets in the European and American continents, respectively. This led to an increasing veterinary interest in deepening the knowledge regarding their normal anatomy, as a basic contribution to other fields of veterinary medicine, including diagnostic imaging, surgery, and pathological anatomy.
Being part of a bilateral framework co-tutelage agreement leading to a joint Doctoral Degree between the Alma Mater Studiorum of Bologna, Italy and the Universidad Nacional del Litoral of Santa Fe, Argentina, this research project was partly carried out in Italy (study of guinea pigs) and partly in Argentina (study of capybaras). It consisted in the macroscopic study, through anatomical dissections of carcasses of both species as well as the use of anatomical casts, and in the histological study of the various systems in the two species, and was aimed at creating a gross and microscopic comparative anatomical atlas.
From the gross and microscopic morphological and morphometrical anatomical study of the different system of the guinea pig and capybara, several analogies and differences emerged.
The creation of a comparative anatomical atlas of gross and microscopic anatomy of the capybara and the guinea pig might prove useful for clinical, zootechnical and research purposes.
21
Highsmith, Jason Michael. "Computer Modeling of Anatomical Structure: A Representative Example of Modeling the Inguinal Canal." VCU Scholars Compass, 1996. http://scholarscompass.vcu.edu/etd/5070.
Full textAbstract:
As computers become an increasingly important part of medical education, a proper understanding of the techniques and applications of computer aided modeling is vital. An initial overview of medical imaging and the techniques of computer modeling is presented. Construction of three-dimensional models of anatomical structures is then discussed in great detail with specific focus on modeling structures like the inguinal canal. The inguinal canal is one region where computer modeling efforts should be directed because it presents a special challenge. Understanding the walls, borders and layering of the inguinal canal is especially difficult but vital to accurate clinical diagnoses of hernias. Computer-based instruction based on high-quality three dimensional images promises to greatly enhance students’ learning and comprehension of difficult anatomical structures and relationships.
22
Božić, Mirjana. "Morphological structure in visual word recognition : behavioural and neuroimaging evidence." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.614134.
Full text
23
Petryshen, O. I. "Morphological structure of the kidney under the influence of salts." Thesis, БДМУ, 2020. http://dspace.bsmu.edu.ua:8080/xmlui/handle/123456789/17547.
Full text
24
Bozkurt, Uğur Süel Akın. "The morphological characteristics of the block structure in central areas/." [s.l.]: [s.n.], 2004. http://library.iyte.edu.tr/tezler/master/sehirplanlama/T000303.pdf.
Full text
25
Henderson, Haley. "Investigations into the anatomical structure and differentiation related gene expression in the dog claw." Thesis, De Montfort University, 2007. http://hdl.handle.net/2086/13245.
Full text
26
Dowgiewicz, Jason M. "Inter- and Intra-Specific Variation in Wear Mechanisms in Agrostis: I. Wear Tolerance and Recovery Ii. Anatomical, Morphological and Physiological Characteristics." Amherst, Mass. : University of Massachusetts Amherst, 2009. http://scholarworks.umass.edu/theses/243/.
Full text
27
Ishii, Nobuyuki. "Morphological differences in crano-facial structure between Japanese and Caucasian subjects." Thesis, University College London (University of London), 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269736.
Full text
28
Yoon, Chae-Shin. "Plan schematization : a computational approach to morphological structure of architectural space." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/11445.
Full textAbstract:
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Architecture and Planning, 1995.<br>Includes bibliographical references (leaves 260-263).<br>In this thesis an architectural design theory is premised so that plan making can start from a 'space scheme' which is a description of 'hierarchic balloon representation'. The space organization of a plan is described in hierarchic balloon representation in terms of a part/whole hierarchy of adumbrated space units. The information processing from bitmap representation of a plan image to hierarchic balloon representation of a space scheme is proposed to have two intermediate representations: FEB representation and primitive balloon representation. The purpose of constructing an FEB representation is to provide a principled ground for space identification. The idea of the FEB representation originates from the simulation of the directional inclination resulting from imaginary space perception in a plan. The primitive balloon representation is constructed to explicate the process of identifying and describing space primitives in a plan. The primitive balloon representation is so named because space primitives are described by extending the basin core outward which resembles the process of inflating a balloon. Hierarchic balloon representation differs from both FEB representation and primitive balloon representation in that it is dependent on primitive balloon representation by using the transform algorithm of deriving FEB representation but it also allows optional modifications.<br>by Chaeshin Yoon.<br>Ph.D.
29
Shampa. "Hydro-morphological Study of Braided River with Permeable Bank Protection Structure." Kyoto University, 2019. http://hdl.handle.net/2433/242463.
Full text
30
Copot, Maria-Sorina. "The paradigmatic organisation of morphological knowledge." Electronic Thesis or Diss., Université Paris Cité, 2023. http://www.theses.fr/2023UNIP7094.
Full textAbstract:
Cette thèse porte sur les relations implicatives fines qui soudent les paradigmes, et sur leur rôle dans la structure du lexique mental. Elle commence par un aperçu des concepts clés tels que les paradigmes, les relations implicatives fines, la mémoire et la prédictibilité, puis présente cinq articles sur le sujet, qui s'appuient sur des méthodes relevant de la linguistique de corpus, la linguistique expérimentale et la linguistique computationnelle. "Behavioural evidence for implicative paradigmatic relationships" montre que les locuteurs sont conscients des relations implicatives dans le système flexionnel de leur langue, et examine la relation entre la prédictibilité paradigmatique et la fréquence. "Baseless derivation : the behavioural reality of derivational paradigms" présente des résultats expérimentaux soutenant l'hypothèse selon laquelle les paradigmes dérivationnels sont également structurés par des relations implicatives. "Idiosyncratic frequency as a measure of derivation vs. inflection" opérationnalise l'affirmation selon laquelle la flexion relie des mots appartenant au même lexème et la dérivation relie des mots appartenant à des lexèmes différents, et place les procédés morphologiques du français sur le continuum flexion-dérivation, sur la base d'une mise en œuvre quantitative de ce critère de distinction. "Defectiveness in French as a product of prescriptivism" explore la relation entre la défectivité et les constructions stigmatisées, apportant des arguments pour soutenir que les locuteurs évitent les mots défectifs pour des raisons en partie sociolinguistiques. "A word-and-paradigm workflow for fieldwork annotation" présente un outil pour l'analyse morphologique et l'annotation des langues sous-documentées basé sur la morphologie mot-et-paradigme, qui permet d'impliquer plus facilement la communauté des locuteurs de la langue dans le processus de documentation. Les articles sont suivis d'une discussion soulignant les thèmes communs entre eux et les futures directions de recherche<br>This thesis is about the fine implicative relationships that hold paradigms together, and their role in the structure of the mental lexicon. It starts with an overview of key concepts such as paradigms, fine implicative relationships, memory and predictability, and subsequently features five articles on the subject, relying on methods from corpus, experimental and computational linguistics. "Behavioural evidence for implicative paradigmatic relationships" shows that speakers are aware of and make use of implicative relations in their inflectional system, and examines the relationship between paradigmatic predictability and frequency. "Baseless derivation: the behavioural reality of derivational paradigms" presents experimental evidence in favour of the hypothesis that derivational paradigms are also structured by implicative relationships. "Idiosyncratic frequency as a measure of derivation vs. inflection" operationalises the statement that inflection links words belonging to the same lexeme and derivation links words belonging to different lexemes, and places morphological processes of French along the inflection-derivation continuum based on a quantitative implementation of this criterion for the distinction. "Defectiveness in French as a product of prescriptivism" explores the relationship between defectiveness and stigmatised constructions, finding evidence in favour of the hypothesis that speakers avoid defective words for partly social reasons. "A word-and-paradigm workflow for fieldwork annotation" outlines a tool for the morphological analysis and annotation of underdocumented languages based on word-and-paradigm morphology, which makes it easier to involve the community of speakers of the language in the process of documentation. The articles are followed by a discussion outlining common themes between them, and future research directions
31
Islam, Mahmuda [Verfasser], Achim [Akademischer Betreuer] Bräuning, and Bernhard [Gutachter] Schuldt. "Impacts of climate on wood anatomical features in tree species with different anatomical structure from tropical monsoon Asia / Mahmuda Islam ; Gutachter: Bernhard Schuldt ; Betreuer: Achim Bräuning." Erlangen : Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2019. http://d-nb.info/1190892243/34.
Full text
32
Morhardt, Ashley C. "Gross Anatomical Brain Region Approximation (GABRA): Assessing Brain Size,Structure, and Evolution in Extinct Archosaurs." Ohio University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1470743129.
Full text
33
Böhnke, Martin [Verfasser], Helge [Akademischer Betreuer] Bruelheide, Christian [Akademischer Betreuer] Wirth, and Lourens [Akademischer Betreuer] Poorter. "Functional diversity in a subtropical forest based on anatomical and morphological species traits / Martin Böhnke. Betreuer: Helge Bruelheide ; Christian Wirth ; Lourens Poorter." Halle, Saale : Universitäts- und Landesbibliothek Sachsen-Anhalt, 2011. http://d-nb.info/1025301749/34.
Full text
34
Sharma, Sundrish. "Characterization of quantitative loci for morphological and anatomical root traits on the short arm of chromosome 1 of rye in bread wheat." Diss., [Riverside, Calif.] : University of California, Riverside, 2009. http://proquest.umi.com/pqdweb?index=0&did=1899491951&SrchMode=2&sid=1&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1269025605&clientId=48051.
Full textAbstract:
Thesis (Ph. D.)--University of California, Riverside, 2009.<br>Includes abstract. Title from first page of PDF file (viewed March 18, 2010). Includes bibliographical references. Issued in print and online. Available via ProQuest Digital Dissertations.
35
Malyk, Yu Yu. "Morphological structure of the left ventricle papillary muscles of the human’s heart." Thesis, БДМУ, 2022. http://dspace.bsmu.edu.ua:8080/xmlui/handle/123456789/19351.
Full text
36
Crivellaro, Alan. "Wood, bark and pith structure in trees and shrubs of Cyprus: anatomical descriptions and ecological interpretation." Doctoral thesis, Università degli studi di Padova, 2012. http://hdl.handle.net/11577/3422435.
Full textAbstract:
The dissertation deals with wood, bark and pith anatomy of trees and shrubs of Cyprus. It consist of three parts: (1) the anatomical description of stem wood, twig bark and pith of the endemic and indigenous trees and shrubs species belonging to the flora of the island, (2) the ecological wood and bark anatomies interpretation and (3) a study focused on conductive vs. mechanical tradeoff in climbers vs. subshrubs.
Original samples for each species were collected during 3 field trips on Cyprus. About 270 species were collected, and 600 double stained (astra blue and safranin) slides were prepared. New lists of anatomical features were developed for the specific needs of this research, especially for bark and pith anatomy. The described species represent almost the entire woody flora of the island. A great number of them have never been anatomically described before. The anatomical descriptions are a perfect base for wood anatomists interested to wood structure of single species or the range of anatomical patterns within the Eastern Mediterranean region, and also for archeologist and palaeobotanists who determine wood remains, and for wood technologist who compare structures with physical wood properties.
In the ecological wood anatomy analysis we observed wood diffuse porous structure associated to woody chamaephytes. We detected semi-ring and ring porous xylems related to nanophanerophytes and phanerophytes. Rays features seem to be associate to space filling in wood, and the rays dimensional features seems to be constrained by vessels. In fact, rays became larger moving from woody chamaephytes to phanerophytes, and the numbers of rays per millimeter decrease moving from woody chamaephytes to phanerophytes, maybe allowing vessels to be greater in taller life forms. Raylessness is clearly associated to woody chamaephytes. Rays composition vary from homogeneous in woody chamaephytes, to heterogeneous in nanophanerophytes and phanerophytes. The axial parenchyma was rare in woody chamaephytes, apotracheal in nanophanerophytes and mainly paratracheal in phanerophytes. Endemic species showed absence of axial parenchyma, raylessness, homogeneous rays, and did not show association to tension wood. We recorded a predominance of diffuse porous species in dry/hot site, and the presence of ring porous species in wet/cold sites. Diffuse porous structures were associated to rocky and sandy sites, and semi-ring porous woods to forest and shrublands habitats. Thick walled fibers species were associated to moist and ruderal habitats, thin walled fibers to forest and shrubland species. A clear trend was observed in fiber wall thickness vs. wood density: greater in the fiber wall thickness, greater is the wood density.
The bark anatomical features describe sieve tube morphology and distribution, sclerenchyma presence and arrangement, rays, phellem, phelloderm, crystals, secretory structures, and appearance under polarized light. Sieve tubes were typically arranged tangentially in nanophanerophytes but not in woody chamaephytes. Bark ray dilatation was noted in moist site species but lacking in endemic, shrubland, and forest species. Sclerenchyma tended to be lacking in woody chamaephytes, and in endemic and dry site species. The tangential arrangement of fibers tended to be lacking in woody chamaephytes and Mediterranean species. The presence of prismatic crystals was associated with nanophanerophytes and phanerophytes, but not with endemic, shrubland, or forest species. Phloem homogeneity was associated with endemic species. Phellem homogeneity was associated with climbers, phanerophytes, and species of moist habitats. The association of sclerenchyma with life form suggests a biomechanical role, especially for young twigs. The level of endemism and the species' habitat were strongly linked to a number of bark features opening new fields of ecophyletic and ecophysiological investigation.
In the third part of the dissertation the all sampled woody climbers (10 species) and most of the woody subshrubs (25 species) of Cyprus were characterized by their vessel and fiber anatomies relative to mechanical and hydraulic function. Consistent with their lower need for self-support, on average the climbers had lower wood density than did the subshrubs, and had a lower proportion of their cross-section devoted to fibers. Consistent with climbers’ need for higher hydraulic conductance and total plant height, climbers had vessel sizes and frequencies closer to the theoretical packing limit than did subshrubs.<br>La tesi si occupa di anatomia del legno, della corteccia e del midollo di alberi e arbusti appartenenti alla flora dell'isola di Cipro. Si compone di tre parti: (1) la descrizione anatomica del legno del tronco, e di corteccia e midollo dei rametti, (2) l'interpretazione ecologica dell'anatomia del legno e della corteccia e (3) uno studio focalizzato sul compromesso delle funzioni di conduzione e di sostegno meccanico in liane a piccoli arbusti.
Nel corso di 3 campionamenti a Cipro sono stati raccolti campioni per circa 270 specie. Da questi sono stati realizzati 600 preparati anatomici a doppia colorazione (astra blu e safranina). Nuove liste codificate per la descrizione delle caratteristiche anatomiche della corteccia e del midollo sono state sviluppate appositamente per gli scopi di questa ricerca. Le specie descritte rappresentano quasi l’intera flora legnosa dell’isola. Un gran numero di specie sono qui descritte prima dal punto di vista anatomico. Le descrizioni anatomiche sono una base perfetta per anatomisti legno interessati alla struttura in legno di singole specie o allo studio della gamma di modelli anatomici nella regione del Mediterraneo orientale, e anche per archeologi e paleobotanici che hanno la necessità di identificare reperti legnosi, e anche per tecnologi del legno che confrontano le strutture anatomiche con le proprietà fisiche e meccaniche del legno.
Le indagini di ecologia del legno hanno rilevato relazioni statisticamente significative tra legno a porosità diffusa e camefite legnose, mentre le porosità semi diffusa e anulare sono legate alle nanofanerofite e alla fanerofite arboree rispettivamente. Le caratteristiche dei raggi sembrano associate al riempimento dello spazio nel legno e le dimensioni dei raggi in sezione trasversale sembrano limitate dai vasi. Infatti i raggi sono più larghi nelle fanerofite arboree che nelle camefite legnose e il numero di raggi per millimetro diminuisce passando da fanerofite arboree, a nanofanerofite fino alle camefite legnose, consentendo così alla forme biologiche con altezza maggiore di avere vasi più grandi. L'assenza di raggi è una caratteristica tipica delle camefite legnose. La composizione dei raggi varia da omogenea nelle camefite legnose a eterogenea in nanofanerofite e fanerofite arboree. Il parenchima assiale è raro o difficilmente osservabile nelle camefite legnose, tipicamente apotracheale nelle nanofanerofite e principalmente paratracheale nelle fanerofite arboree. Le specie endemiche a Cipro sono caratterizzate dall'assenza di parenchima assiale, dall'assenza di raggi o dalla presenza di raggi omogenei e non mostrano alcuna relazione significativa con la presenza di legno di tensione. È stata riscontrata una netta predominanza di specie a porosità diffusa nei siti caldi e secchi, e di specie a porosità anulare in siti umidi e freddi. Legni a porosità diffusa appartengono a specie che vivono in siti rocciosi e sabbiosi, la porosità anulare è associata ad habitat forestali e di macchia mediterranea. Le fibre a parete spessa risultano legate a a siti umidi, fibre a pareti sottili ad habitat forestali e di macchia mediterranea. Un chiaro trend lega proporzionalmente lo spessore delle fibre con la densità del legno.
Le caratteristiche anatomiche analizzate per la corteccia descrivono morfologia e distribuzione dei tubi cribrosi, la presenza e la disposizione di tessuti sclerenchimatici, i raggi, il sughero, il felloderma, i cristalli, le strutture di secrezione e la visibilità in luce polarizzata. I tubi cribrosi sono tipicamente disposti in bande tangenziali nelle nanofanerofite, ma non nelle camefite legnose. L'allargamento dei raggi nel felloderma è legato a specie che vegetano in siti midi, non è presente nelle specie endemiche, in quelle tipiche di macchia mediterranea a negli habitat forestali. I cristalli sono associati alle nanofanerofite e alle fanerofite arboree, non alle specie endemiche, di macchia e di ambiente forestale. L'omogeneità del felloderma è stata riscontrata nelle fanerofite lianose, in quelle arboree e alle specie di ambienti umidi. L'associazione di tessuti sclerenchimatici con le forme biologiche suggerisce un ruolo biomeccanico di questo tessuto, soprattutto nei giovani rametti. Il livello di endemico e l'habitat delle specie sono fortemente legati a diverse caratteristiche anatomiche della corteccia offrendo nuove possibilità di studio nel campo dell'ecologia e dell'ecofisiologia.
Nella terza parte che costituisce la tesi tutte le 10 specie di fanerofite lianose campionate e la maggior parte delle camefite legnose (25 specie) sono state caratterizzate per quanto riguarda le caratteristiche anatomiche di vasi e fibre che hanno ripercussioni importanti nelle funzioni di conduzione e di sostegno meccanico del legno. In accordo con la loro inferiore necessita di auto-sostegno, le fanerofite lianose hanno una densità basale inferiore rispetto alle camefite legnose. Inoltre, le liane presentano una inferiore proporzione di sezione trasversale destinata a fibre. In accordo con le maggiori necessità conduttive e in relazione alla loro altezza, le liane hanno un diametro e una frequenza dei vasi che le colloca più vicine al funzione "packing limit" rispetto alle camefite legnose.
37
Gu, Hongmei. "Structure Based, Two-dimensional, Anisotropic, Transient Heat Conduction model for Wood." Diss., Virginia Tech, 2001. http://hdl.handle.net/10919/28938.
Full textAbstract:
The importance of precise values for the parameters used in heat and mass transfer models has been demonstrated by many research studies. Thermal conductivity values used in previous models are usually empirical and fluctuate. Theoretical analysis and estimations of wood thermal conductivities in the radial and tangential directions were conducted with the geometric models built up from the macro- and micro-structure observations. Theoretically, thermal conductivity in the radial direction is about 1.5 to 2.5 times of the tangential direction for softwood species with moisture content (MC) below Fiber Saturation Point (FSP). When MC is over the FSP, tangential radial thermal conductivity both increase dramatically and are linear function of MC. The two thermal conductivity values are close with a ratio of near one estimated by the model for MC above the FPS. In hardwood species, radial thermal conductivity estimated by the model is 1.5 times of the tangential thermal conductivity. Validation tests for model estimations of thermal conductivities in the radial and tangential directions for three wood species showed the reliability of the geometric models developed in this project. Correlations between the wood thermal conductivity and structure parameters, such as latewood percentage and cell wall percentage, were examined. Linear relationships for the thermal conductivity and average temperature in wood were established in both radial and tangential directions of three wood species.
A two-dimensional transient heat conduction model was developed utilizing thermal conductivity values derived from geometric models. The anisotropic material property affect on heat transport in radial and tangential directions was discussed using an assumed situation. The simulation run showed slightly faster heat flow in the radial direction than in the tangential direction due to higher thermal conductivity in the radial direction. Validation tests on practical wood blocks showed the 2D model with the use of theoretical thermal conductivity values can predict good temperature distribution in wood during the heating process. However, in the practical wood samples with curved rings on the cross section, no significant difference was found in the two transverse directions.
Mathematica software was introduced in this study for the intense and complicated math calculations and model programming. Mathematica was found to be a powerful technique for solving sophisticated math problems. It had abundant and flexible plotting options for providing optimized presentations for the results. These advantages make Mathematica popular for engineering modeling research.<br>Ph. D.
38
Peleteiro, M. C. C. V. "Morphological and cytochemical studies on the skin of rainbow trout, Salmo gairdneri, Richardson." Thesis, University of Stirling, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377513.
Full text
39
Johnston, Jason Clift. "Systematic Homonymy and the Structure of Morphological Categories: Some Lessons from Paradigm Geometry." Thesis, The University of Sydney, 1996. http://hdl.handle.net/2123/396.
Full textAbstract:
This thesis takes as its starting point proposals to model inflectional paradigms as geometrical structures, wherein systematic homonymies are constrained to occupy contiguous regions. It defines a precise criterion for assessing systematicity and shows, for a range of largely Indo-European and Afro-Asiatic data, that such models are observationally adequate in modelling systematic homonymies within a single inflectional dimension, and to a lesser extent, between different inflectional dimensions. This is taken to indicate that widely assumed characterizations of inflectional categories in terms of cross-classifying binary features are incorrect, inasmuch as such characterizations fail to predict the linearizability of natural classes of properties belonging to those categories. The same inadequacy besets attempts to account for systematic homonymies by means of rules that convert or 'refer' one morpho-syntactic representation to another. Rather it is argued that the linearizability of natural classes of properties suggests that inflectional categories are structured as a sub-classification of those properties, but that a phenomenon of 're-marking' serves to define, under strict constraints, additional natural classes beyond those defined by the sub-classification itself. The specific sub- classifications indicated by observed patterns of homonymy are language-specific. In addition, the properties so sub-classified under a single node may in certain cases be drawn from separate morpho-syntactic categories. This is taken to indicate that the terminal nodes of a morphological sub-classification are not morpho-syntactic feature complexes but purely morphological functions performing a discontinuous mapping between morpho-syntactic and morpho-phonological representations. The systematicity of homonymy patterns, then, is shown to be evidence for a linguistic level of 'pure morphology'.
40
Johnston, Jason Clift. "Systematic Homonymy and the Structure of Morphological Categories: Some Lessons from Paradigm Geometry." University of Sydney, Linguistics, 1996. http://hdl.handle.net/2123/396.
Full textAbstract:
This thesis takes as its starting point proposals to model inflectional paradigms as geometrical structures, wherein systematic homonymies are constrained to occupy contiguous regions. It defines a precise criterion for assessing systematicity and shows, for a range of largely Indo-European and Afro-Asiatic data, that such models are observationally adequate in modelling systematic homonymies within a single inflectional dimension, and to a lesser extent, between different inflectional dimensions. This is taken to indicate that widely assumed characterizations of inflectional categories in terms of cross-classifying binary features are incorrect, inasmuch as such characterizations fail to predict the linearizability of natural classes of properties belonging to those categories. The same inadequacy besets attempts to account for systematic homonymies by means of rules that convert or 'refer' one morpho-syntactic representation to another. Rather it is argued that the linearizability of natural classes of properties suggests that inflectional categories are structured as a sub-classification of those properties, but that a phenomenon of 're-marking' serves to define, under strict constraints, additional natural classes beyond those defined by the sub-classification itself. The specific sub- classifications indicated by observed patterns of homonymy are language-specific. In addition, the properties so sub-classified under a single node may in certain cases be drawn from separate morpho-syntactic categories. This is taken to indicate that the terminal nodes of a morphological sub-classification are not morpho-syntactic feature complexes but purely morphological functions performing a discontinuous mapping between morpho-syntactic and morpho-phonological representations. The systematicity of homonymy patterns, then, is shown to be evidence for a linguistic level of 'pure morphology'.
41
Brittin, Mark. "Analytical and morphological studies of polymer-stabilised liquid crystals." Thesis, University of Reading, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297785.
Full text
42
Venkateshwaran, Lakshmi Narayan. "Structural and morphological characterization of model elastomeric ion containing polymers." Diss., Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/54443.
Full textAbstract:
Over the last several years, there has been widespread interest in the structure property behavior of ion containing polymers. Of particular interest are those materials termed ionomers which contain ionic groups that are typically less than 15 mole percent. These ionic interactions provides an additional means of controlling polymer structure and properties. In the conventional ionomers, the ionic groups are placed randomly along the polymeric backbone resulting in a network structure that is rather poorly defined. An alternate approach is to prepare ionomers where the ionic groups are placed at well defined locations along the polymer backbone such as the telechelic ionomers, block ionomers, or the segmented ionomers where the ionene polymers serve as an example. The structure-property behavior of all these three types of ionomers have been investigated in this study.
The telechelic ionomers were based on either a polyisoprene (PIP) or polybutadiene (PBD) backbone. The PIP ionomers have been neutralized with various cations and neutralized to different levels. The bulk properties were found to be highly dependent on the nature of the cation, its valency, and its ionic radius. A series of sulfonated and carboxylated ionomers of similar molecular weight have been studied in order to compare the performance of sulfonated ionomers to that of the carboxylated counterpart. As expected, the nature of ionic association in the sulfonated ionomer was found to be much stronger than in the carboxylate ionomer. The extent of neutralization as well as variations in the non-ionic segment molecular was studied in the PBD telechelic ionomers. For the first time, a bimodal type of SAXS peak was observed for 2000 M̅<sub>n</sub>, PBD ionomer.
In the segmented ionene polymers, the effect of the non-ionic segment (PTMO) molecular weight, the nature of the counterion (Cl vs. Br vs. I), and the architecture of the ionene segment were investigated. From SAXS analysis, a change in the morphology was indicated when the PTMO segment molecular weight exceeded 3400 M̅<sub>n</sub>. It was estimated that the interfacial region was very sharp in all the materials investigated. One of the main limitations of the ionene polymers discussed herein is that the material undergoes irreversible degradation at elevated temperature. It has been shown that with the addition of an ionic plasticizer such as zinc stearate, the softening temperature of the ionene polymer is lowered which allows thermal processing without a major loss of properties.
A detailed morphological investigation of methacrylate based block ionomers was conducted. The effect of ionic block length, the architecture of the segments, and variations in the polarity of the glassy segments were investigated. Though the diblock materials exhibited poor tensile properties, the morphological features of these materials were very interesting. Multiple scattering peaks were observed in the diblock materials using SAXS. Both highly ordered as well as disordered regions were observed from TEM measurements. The spacing observed from TEM measurements correlates quite well with that observed from SAXS. Surprisingly, long range ordering was absent in the triblock ionomer with similar ion content. Finally, the spacing between the ionic domains were found to be a strong function of the ionic block length.<br>Ph. D.
43
Gamieldien, Mohamed Y. "The retromolar foramen in the South African population : prevalence, structure and clinical significance of an anatomical variation." Diss., University of Pretoria, 2014. http://hdl.handle.net/2263/45964.
Full textAbstract:
The retromolar foramen represents a little known anatomical variation in the
posterior mandible of uncertain clinical importance. It has been the subject of limited
study. Findings and conclusions of these studies have been placed under little
scrutiny.
Suggested clinical consequences associated with the presence of the retromolar
foramen include local anaesthetic failure, local haemorrhage during surgery,
perineural spread of infectious and invasive pathology, and loss of sensation in the
normal distribution of the buccal nerve due to surgical intervention. Reports of the
possibility of these complications seem to suggest that the retromolar foramen, canal
and its associated neurovascular bundle are structures of great clinical importance.
Case reports seem to have, however, only included reports of loss of gingival and
buccal sensation as a consequence of third molar surgery in the presence of this
anomaly. This study therefore aimed to report the prevalence of the retromolar foramen and
canal in the South African population, describe its course and structure, and produce
a clinical framework in which to approach the presence of the retromolar foramen.
Comparisons between the present and existing studies were made and conclusions
concerning the clinical importance of this structure were drawn.
Inspection of a sample containing 946 mandibles was performed. Of these, 885 were
regarded as suitable for inclusion. These mandibles were inspected for the presence
of a retromolar foramen in which a 1 mm diameter needle could pass through without
resistance. The distance from the last tooth in the arch to the retromolar foramen
was also measured. Fifty of these mandibles were then randomly selected and
scanned using microfocus computed tomography. Seventy mandibles were found to have at least one retromolar foramen (7.9% of the
total sample). No statistically significant differences were found when the presence
of the retromolar foramen was correlated with race, sex or age. The finding that sex
and age played no significant role in the presence of the retromolar foramen is in
agreement with available literature. Detected prevalence seemed to be heavily
influenced by the method used to determine the presence of the retromolar foramen.
The average distance between the second mandibular molar and the retromolar
foramen was 16.83 ± 5.57 mm and the average distance between the third
mandibular molar and the retromolar foramen was 10.47 ± 3.77 mm. These findings
were found to be in agreement with most other reports.
Fifty retromolar canals were selected at random and scanned using microfocus
computed tomography. Analysis revealed four basic patterns. These were type A, a
vertical canal between the inferior alveolar canal and the retromolar area of the
mandible, type B, a curved canal taking a recurrent course between the inferior
alveolar canal and the retromolar area, type C, a canal with an approximately
horizontal path between the inferior alveolar canal and the retromolar area, and the temporal crest canal (TCC, not designated as type D to create a distinction between
it and types A, B and C), a canal terminating on either side of the temporal crest.
Type B was the most common presentation (68% of retromolar canals in the study),
a finding contrary to that of other studies.
The presence of the retromolar neurovascular bundle is of uncertain clinical
importance and requires further anatomical and pharmacological study to determine
its effect on local anaesthetic failure. A model in which the retromolar canal branches
from the inferior alveolar canal does not seem to support a conclusion in which local
anaesthetic failure may be directly attributable the presence of this anatomical
variation alone. Classification of the retromolar canal is of limited clinical use and
may require a revised scheme if clinical application is sought. Complications
associated with the presence of the retromolar foramen are poorly documented and
seem to be of little consequence.<br>Dissertation (MSc)--University of Pretoria, 2014.<br>tm2015<br>Anatomy<br>MSc<br>Unrestricted
44
Hanson, Julienne Mary. "Order and structure in urban space : a morphological history of the City of London." Thesis, University College London (University of London), 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.281848.
Full text
45
Adewole, Akinlabi A. "Mixing, morphological structure and properties relationship for rubber-modified polypropylene-g-polystyrene copolymer blends." Thesis, Loughborough University, 1997. https://dspace.lboro.ac.uk/2134/32028.
Full textAbstract:
As produced reactor copolymer, obtained by in-reactor grafting polymerization technology is a two-phase rigid polymer, which combines the best attributes of semicrystalline polypropylene and those of amorphous polystyrene. In the process, the compatibilizer, PP-g-PS and the non-olefinic polymer component, PS are simultaneously generated from the monomer styrene. The reactor product which has higher modulus but lower impact resistance is further toughened by incorporation of EPR (ethylene propylene rubber) and SEBS (styrene-ethylene-butylene-styrene) triblock copolymer, via intensive melt-mixing in a downstream compounding operation.
46
Escorcia, Gutierrez José. "Image Segmentation Methods for Automatic Detection of the Anatomical Structure of the Eye in People with Diabetic Retinopathy." Doctoral thesis, Universitat Rovira i Virgili, 2021. http://hdl.handle.net/10803/671543.
Full textAbstract:
Aquesta tesi s'emmarca dins del pla integral de prevenció precoç de la Retinopatia Diabètica (RD) posat en marxa pel govern espanyol seguint les recomanacions de l'Organització Mundial de la Salut de promoure iniciatives que consciencien sobre la importància de fer revisions oculars regulars entre les persones amb diabetis.
Per tal de poder determinar el nivell de retinopatia diabètica cal localitzar i identificar diferents tipus de lesions a la retina. Per poder fer-ho, cal que primer s'eliminin de la imatge les estructures anatòmiques normals de l'ull (vasos sanguinis, disc òptic i fòvea) a fi de fer més visibles les anomalies. Aquesta tesi s'ha centrat en aquest pas de neteja de la imatge.
En primer lloc, aquesta tesi proposa un nou marc per a la segmentació ràpida i automàtica del disc òptic basat en la Teoria del Portafoli de Markowitz. En base a aquesta teoria es proposa un model innovador de fusió de colors capaç d'admetre qualsevol metodologia de segmentació en el camp de la imatge mèdica. Aquest enfoc s'estructura com una etapa de pre-processament potent i en temps real que es podria integrar-se a la pràctica clínica diària, permetent accelerar el diagnòstic de la DR a causa de la seva simplicitat, rendiment i velocitat.
La segona contribució d'aquesta tesi és un mètode per fer simultàniament una segmentació dels vasos sanguinis i la detecció de la zona avascular foveal, reduint considerablement el temps de processament d'imatges. A més a més, el primer component de l'espai de color xyY (que representa els valors de crominància) és el que predomina en l'estudi dels diferents components de color desenvolupat en aquesta tesi, centrat en la segmentació dels vasos sanguinis i la detecció de fòvea. Finalment, es proposa una recopilació automàtica de mostres per fer una interpolació estadística del color i que són utilitzades en l'algorisme de segmentació de Convexity Shape Prior.
La tesi també proposa un altre mètode de segmentació dels vasos sanguinis que es basa en una selecció de característiques efectiva basada arbres de decisions. S'ha aconseguit trobar les 5 característiques més rellevants per segmentar aquestes estructures oculars. La validació mitjançant tres tècniques de classificació diferents (arbres de decisions, xarxes neuronals i màquines de suport vectorial).<br>Esta tesis se enmarca dentro del plan integral de prevención contra la Retinopatía Diabética (RD), ejecutado por el Gobierno de España alineado a las políticas de la Organización Mundial de la Salud para promover iniciativas que conciencien a la población con diabetes sobre la importancia de exámenes oculares de manera periódica.
Para poder determinar el nivel de retinopatía diabética hace falta localizar e identificar diferentes tipos de lesiones en la retina. Para conseguirlo primero se han de eliminar de la imagen las estructures anatómicas normales del ojo (vasos sanguíneos, disco óptico y fóvea) para hacer visibles las anomalías. Esta tesis se ha centrado en este paso de limpieza de la imagen.
En primer lugar, esta tesis propone un novedoso enfoque para la segmentación rápida y automática del disco óptico basado en la Teoría de Portafolio de Markowitz. En base a esta teoría se propone un innovador modelo de fusión de color capaz de soportar cualquier metodología de segmentación en el campo de las imágenes médicas. Este enfoque se estructura como una etapa de preprocesamiento potente y en tiempo real que podría integrarse en la práctica clínica diaria para acelerar el diagnóstico de RD debido a su simplicidad, rendimiento y velocidad.
La segunda contribución de esta tesis es un método para segmentar simultáneamente los vasos sanguíneos y detectar la zona avascular foveal, reduciendo considerablemente el tiempo de procesamiento para tal tarea. Adicionalmente, la primera componente del espacio de color xyY (que representa los valores de crominancia) es la que predomina del estudio de las diferentes componentes de color realizado en esta tesis para la segmentación de vasos sanguíneos y la detección de la fóvea. Finalmente, se propone una recolección automática de muestras para interpolarlas basadas en la información estadística de color y que a su vez son la base del algoritmo Convexity Shape Prior.
La tesis también propone otro método de segmentación de vasos sanguíneos basado en una selección efectiva de características soportada en árboles de decisión. Se ha conseguido encontrar las 5 características más relevantes para la segmentación de estas estructuras oculares. La validación utilizando tres técnicas de clasificación (árbol de decisión, red neuronal artificial y máquina de soporte vectorial).<br>This thesis is framed within the comprehensive plan for early prevention of Diabetic Retinopathy (DR) launched by the Spain government following the World Health Organization to promote initiatives that raise awareness of the importance of regular eye exams among people with diabetes.
To determine the level of diabetic retinopathy, we need to find and identify different types of lesions in the eye fundus. First, the normal anatomic structures of the eye (blood vessels, optic disc and fovea) must be removed from the image, in order to make visible the abnormalities. This thesis has focused on this step of image cleaning.
This thesis proposes a novel framework for fast and fully automatic optic disc segmentation based on Markowitz's Modern Portfolio Theory to generate an innovative color fusion model capable of admitting any segmentation methodology in the medical imaging field. This approach acts as a powerful and real-time pre-processing stage that could be integrated into daily clinical practice to accelerate the diagnosis of DR due to its simplicity, performance, and speed.
This thesis's second contribution is a method to simultaneously make a blood vessel segmentation and foveal avascular zone detection, considerably reducing the required image processing time. In addition, the first component of the xyY color space representing the chrominance values is the most supported according to the approach developed in this thesis for blood vessel segmentation and fovea detection. Finally, several samples are collected for a color interpolation procedure based on statistic color information and are used by the well-known Convexity Shape Prior segmentation algorithm.
The thesis also proposes another blood vessel segmentation method that relies on an effective feature selection based on decision tree learning. This method is validated using three different classification techniques (i.e., Decision Tree, Artificial Neural Network, and Support Vector Machine).
47
Huang, Ruoyu. "3D Freehand Ultrasonography in Quantifying Muscle Morphological Parameters in Lower Extremity." Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-294103.
Full textAbstract:
Muscle morphological parameters such as fascicle length (FL), pennationangle (PA) and physiologic cross-sectional area (PCSA) can provide an insightinto the reasons of the deteriorated muscle functions caused by pathologies.This study investigates the 3D structure of the lower leg muscles using 3Dfreehand ultrasound (3DfUS). This imaging modality uses a motion capturesystem to track the position of the US probe during acquisition and thusreconstruct the structure of the tissues in 3D. In this study, two subjects werescanned on the medial gastrocnemius (MG) and tibialis anterior (TA) musclesin the lower leg using 3DfUS system. The FL and PA of the muscles werecalculated and compared with the values previously measured using diffusiontensor imaging (DTI). The results using 3DfUS were averagely 19.2% largerin FL and 2.9%larger in PA. In conclusion, 3DfUS can successfully determinemuscle morphological parameters within a physiologically acceptable range.But the differences in FL observed between the two imaging modalities werequite big, which probably was due to the differences in sample size and area.The values can also differ greatly within the 3DfUS measurements as a resultof different manipulations during data processing, and the 3DfUS protocolneeds to be further improved in future studies.
48
Farré, Foix Marc. "Morphological structure and biodiversity in fish assemblages = Estructura morfològica i biodiversitat en comunitats de peixos." Doctoral thesis, Universitat de Barcelona, 2016. http://hdl.handle.net/10803/398120.
Full textAbstract:
The study of morphology of organisms has become a widely extended scientific discipline since the beginning of the 20th century, when the scientific community began to establish direct relationships between the anatomical characteristics of organisms and their adaptations and biological strategies. The study of morphological variability allowed determining and understanding the ecological and functional roles of species within the ecosystems where they inhabit. According to this ecomorphological current, ecologists promptly perceived that morphology of species were essential to address many aspects traditionally of their interest that were essential to understand the functioning and organization of communities, such as the resource partitioning or the habitat differentiation. Following these premises, the overall objective of this thesis was to determine and describe the morphological diversity of several fish assemblages, in order to highlight the importance of the study of the morphology of species as an alternative and complementary useful tool in biodiversity and community structure studies. To test the hypotheses and reach the purposes, several fish assemblages with different geographical, environmental, ecological and hydrological conditions were analysed: from mesopelagic fish assemblages from the Canary Islands (NE Atlantic ocean) to coastal fish assemblages along the Catalan coast or demersal fish assemblages along a wide bathymetric range along the continental shelf and slope of the Balearic Islands (NW Mediterranean Sea). The morphological analysis included the overall body shape and the shape and position of fins and sensory organs, and was performed using landmark-based geometric morphometric methods (GM). These analyses are widely used for quantifying and analysing the shape variation between structures, since they allow to describe the geometric characteristics of the structures easily, quickly and with higher level of detail; they conserve the geometric traits of objects along all the procedure and they possess a powerful associated statistical support. Besides, the application of GM also allows the computation of measures of morphological diversity. Thus, another objective of this thesis was to develop new morphological diversity indices from GM methods and describe their correlations with other biodiversity components traditionally more considered (ecological, taxonomical and functional
diversity) in order to demonstrate the validity and provide and additional approach that helps to complement studies of biodiversity of fish assemblages. The morphological structures (morphospaces) and the biodiversity indices were obtained for all the analysed fish assemblages and were compared to assess the ability of the morphological methods in order to describe the structure and organization of fish communities. The results demonstrated that the computed morphological diversity indices correlated significantly with the other biodiversity components, were useful for biodiversity studies since they provide information about the functioning and structure of communities (especially when ecological or functional traits of species and ecosystems are absent or scarce, which can be very common), and in addition they yielded equivalent results when they were computed using quantitative (abundance) and qualitative (presence/absence) data. Besides, the analysis of the morphospaces of the different communities allowed to infer and understand key aspects about the functioning and organization of communities, such as the resource partitioning, the habitat differentiation or interspecific relationships such as coexistence, competence or dominance. Therefore, the general results of the present thesis reinforces and support the hypothesis that the morphology of species is a good tool addressing the ecological and functional roles of species within ecosystems, and that the assessment of the morphological variability among species contributes to better understanding the structure, organization and functioning of communities.<br>L’estudi de la morfologia ha esdevingut una disciplina científica amplament estesa des d’inicis del segle XX, quan es van començar a establir relacions directes entre les característiques anatòmiques dels organismes i les seves adaptacions i estratègies biològiques. L’anàlisi de la variabilitat morfologia permetia definir els rols ecològics i funcionals de les espècies dins els ecosistemes. Seguint aquestes premisses, l’objectiu principal d’aquesta tesi consistia en descriure la diversitat morfològica present en diverses comunitats de peixos teleostis amb condicions ambientals, ecològiques, hidrològiques i geogràfiques diferents, per tal de demostrar la importància de l’estudi de la morfologia com a eina vàlida i complementària en estudis de biodiversitat i d’estructura de comunitats. La caracterització morfològica de les espècies va incloure la forma general del cos així com la forma i posició de les aletes i òrgans sensorials, i va ser mesurada i analitzada mitjançant mètodes de morfometria geomètrica (GM) basats en landmarks. Aquests mètodes son comunament utilitzats per quantificar la variació en la forma entre estructures, ja que permeten descriure les característiques geomètriques del objectes detalladament de manera senzilla i ràpida i presenten un rigorós suport estadístic associat. Un altre objectiu va ser desenvolupar noves mesures de diversitat morfològica a partir de mètodes de GM i determinar la seva correlació amb altres components de la biodiversitat tradicionalment utilitzats (diversitat ecològica, taxonòmica i funcional). Els resultats van demostrar que els índexs morfològics aporten informació addicional en estudis de biodiversitat, que correlacionen significativament amb els altres components de la diversitat i que proporcionen resultats equivalents quan es calculen amb dades qualitatives i quantitatives. A més, l’anàlisi de les estructures morfològiques (morfoespais) de les comunitats va permetre investigar els rols ecològics i funcionals de les espècies, essencials per entendre aspectes que determinen el funcionament i organització de les comunitats, com la repartició de recursos, la diferenciació d’hàbitat o relacions interespecífiques com la coexistència, la competència o la dominància. Per tant, els resultats generals de la tesi reforcen la hipòtesi de que l’avaluació de la variabilitat morfològica es una eina útil que contribueix a millorar el coneixement sobre l’estructura i organització de les comunitats de peixos.
49
Böbel, Alexander [Verfasser], and Gregor [Akademischer Betreuer] Morfill. "Crystallization and demixing: morphological structure analysis in many-body systems / Alexander Böbel ; Betreuer: Gregor Morfill." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2018. http://d-nb.info/1173616233/34.
Full text
50
Kelvin, Lee Steven. "The structure of galaxies : the division of stellar mass by morphological type and structural component." Thesis, University of St Andrews, 2013. http://hdl.handle.net/10023/3689.
Full textAbstract:
The mechanisms which cause galaxies to form and evolve each leave behind distinct structural markers in their wake. Dynamically hot processes (e.g., monolithic collapse, hierarchical merging) give rise to pressure-supported spheroidal structures, including elliptical galaxies and classical bulges. By contrast, dynamically cold processes (e.g., gas accretion, AGN splashback) lead to flattened rotationally-supported disk-like structures, often found on their own or as part of a spiral galaxy. If left in isolation for a sufficient length of time, secular evolutionary processes cause the formation of a bar-like structure within the disk, precipitating the genesis of a rotationally-supported pseudo-bulge. Robustly measuring galaxy structure enables us to ascertain the relative importance of these competing evolutionary mechanisms and; in so doing, help broaden our understanding of how the Universe around us came to be. This thesis explores the relation between galaxy structure, morphology and stellar mass. In the first part I present single-Sérsic two-dimensional model fits to 167,600 galaxies modelled independently in the ugrizYJHK bandpasses using reprocessed Sloan Digital Sky Survey Data Release Seven (SDSS DR7) and UKIRT Infrared Deep Sky Survey Large Area Survey (UKIDSS LAS) imaging data available via the Galaxy and Mass Assembly (GAMA) data base. In order to facilitate this study, we developed Structural Investigation of Galaxies via Model Analysis (SIGMA): an automated wrapper around several contemporary astronomy software packages. We confirm that variations in global structural measurements with wavelength arise due to the effects of dust attenuation and stellar population/metallicity gradients within galaxies. In the second part of this thesis we establish a volume-limited sample of 3,845 galaxies in the local Universe and visually classify these galaxies according to their morphological Hubble type. We find that single-Sérsic photometry accurately reproduces the morphology luminosity functions predicted in the literature. We employ multi-component Sérsic profiling to provide bulge-disk decompositions for this sample, allowing for the luminosity and stellar mass to be divided between the key structural components: spheroids and disks. Grouping the stellar mass in these structures by the evolutionary mechanisms that formed them, we find that hot-mode collapse, merger or otherwise turbulent mechanisms account for ~46% of the total stellar mass budget, cold-mode gas accretion and splashback mechanisms account for ~48% of the total stellar mass budget and secular evolutionary processes for ~6.5% of the total stellar mass budget in the local (z<0.06) Universe.