Academic literature on the topic 'Alpac'

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Journal articles on the topic "Alpac"

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Gerster, Helga. "International Conference on Antioxidants and Lipid Peroxidation in Atherosclerosis and Cancer (ALPAC), Helsinki, 22–25 August 1995." Journal of Nutritional & Environmental Medicine 6, no. 2 (January 1996): 233–36. http://dx.doi.org/10.3109/13590849609001046.

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CHURCH, KENNETH WARD. "Emerging trends: A tribute to Charles Wayne." Natural Language Engineering 24, no. 1 (October 9, 2017): 155–60. http://dx.doi.org/10.1017/s1351324917000389.

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AbstractCharles Wayne restarted funding in speech and language in the mid-1980s after a funding winter brought on by Pierce’s glamour-and-deceit criticisms in the ALPAC report and ‘Whither Speech Recognition’. Wayne introduced a new glamour-and-deceit-proof idea, an emphasis on evaluation. No other sort of program could have been funded at the time, at least in America. One could argue that Wayne has been so successful that the program no longer needs him to continue on. These days, shared tasks and leaderboards have become common place in speech and language (and vision and machine learning) research. That said, I am concerned that the community may not appreciate what it has got until it’s gone. Wayne has been doing much more than merely running competitions, but he did what he did in such a subtle Columbo-like way. Going forward, government funding is being eclipsed by consumer markets. Those of us with research to sell need to find more and more ways to be relevant to potential sponsors given this new world order.
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Majia, Jidi. "Alpaca." Manoa 30, no. 1 (2018): 96. http://dx.doi.org/10.1353/man.2018.0112.

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Wei, Xiao Ying, En Long Yang, Yuan Xue, and Shi Yuan Sun. "Morphology and Performance Analysis of Alpaca and Cashmere Fiber." Applied Mechanics and Materials 477-478 (December 2013): 1336–39. http://dx.doi.org/10.4028/www.scientific.net/amm.477-478.1336.

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Alpaca wool is soft and thin, smooth and delicate, can be applied to many areas of production, such as coat, stuffed shirts, scarves, tapestries, bags, carpets, etc. In this paper, surface morphology and mechanical performance of four kinds of alpaca wool and cashmere were investigated. Fiber diameter, strength and surface morphology of Peru alpaca is similar to Cashmere. Fiber diameter, strength of Peru alpaca is much smaller than those of the other three alpaca wool. The results provide a reference for spinning process development and fiber identification.
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Lawlor, Deborah A., Melanie Lewcock, Louise Rena-Jones, Claire Rollings, Vikki Yip, Daniel Smith, Rebecca M. Pearson, et al. "The second generation of The Avon Longitudinal Study of Parents and Children (ALSPAC-G2): a cohort profile." Wellcome Open Research 4 (February 20, 2019): 36. http://dx.doi.org/10.12688/wellcomeopenres.15087.1.

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Background: The Avon Longitudinal Study of Parents and Children-Generation 2 (ALSPAC-G2) was set up to provide a unique multi-generational cohort. It builds on the existing ALSPAC resource, which recruited 14,541 pregnancies to women resident in the South West of England who were expected to deliver between 01/04/1991 and 31/12/1992. Those women and their partners (Generation 0; ALSPAC-G0) and their offspring (ALSPAC-G1) have been followed for the last 26 years. This profile describes recruitment and data collection on the next generation (ALSPAC-G2)—the grandchildren of ALSPAC-G0 and children of ALSPAC-G1. Recruitment: Recruitment began on the 6th of June 2012 and we present details of recruitment and participants up to 30th June 2018 (~6 years). We knew at the start of recruitment that some ALSPAC-G1 participants had already become parents and ALSPAC-G2 is an open cohort; we recruit at any age. We hope to continue recruiting until all ALSPAC-G1 participants have completed their families. Up to 30th June 2018 we recruited 810 ALSPAC-G2 participants from 548 families. Of these 810, 389 (48%) were recruited during their mother’s pregnancy, 287 (35%) before age 3 years, 104 (13%) between 3-6 years and 30 (4%) after 6 years. Over 70% of those invited to early pregnancy, late pregnancy, second week of life, 6-, 12- and 24-month assessments (whether for their recruitment, or a follow-up, visit) have attended, with attendance being over 60% for subsequent visits up to 7 years (to few are eligible for the 9- and 11-year assessments to analyse). Data collection: We collect a wide-range of social, lifestyle, clinical, anthropometric and biological data on all family members repeatedly. Biological samples include blood (including cord-blood), urine, meconium and faeces, and placental tissue. In subgroups detailed data collection, such as continuous glucose monitoring and videos of parent-child interactions, are being collected.
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Lawlor, Deborah A., Melanie Lewcock, Louise Rena-Jones, Claire Rollings, Vikki Yip, Daniel Smith, Rebecca M. Pearson, et al. "The second generation of The Avon Longitudinal Study of Parents and Children (ALSPAC-G2): a cohort profile." Wellcome Open Research 4 (December 16, 2019): 36. http://dx.doi.org/10.12688/wellcomeopenres.15087.2.

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Background: The Avon Longitudinal Study of Parents and Children-Generation 2 (ALSPAC-G2) was set up to provide a unique multi-generational cohort. It builds on the existing ALSPAC resource, which recruited 14,541 pregnancies to women resident in the South West of England who were expected to deliver between 01/04/1991 and 31/12/1992. Those women and their partners (Generation 0; ALSPAC-G0) and their offspring (ALSPAC-G1) have been followed for the last 27 years. This profile describes recruitment and data collection on the next generation (ALSPAC-G2)—the grandchildren of ALSPAC-G0 and children of ALSPAC-G1. Recruitment: Recruitment began on the 6 th of June 2012 and we present details of recruitment and participants up to 30 th June 2018 (~6 years). We knew at the start of recruitment that some ALSPAC-G1 participants had already become parents and ALSPAC-G2 is an open cohort; we recruit at any age. We hope to continue recruiting until all ALSPAC-G1 participants have completed their families. Up to 30 th June 2018 we recruited 810 ALSPAC-G2 participants from 548 families. Of these 810, 389 (48%) were recruited during their mother’s pregnancy, 287 (35%) before age 3 years, 104 (13%) between 3-6 years and 30 (4%) after 6 years. Over 70% of those invited to early pregnancy, late pregnancy, second week of life, 6-, 12- and 24-month assessments (whether for their recruitment, or a follow-up, visit) have attended, with attendance being over 60% for subsequent visits up to 7 years (too few are eligible for the 9- and 11-year assessments to analyse). Data collection: We collect a wide-range of socioeconomic, lifestyle, clinical, anthropometric and biological data on all family members repeatedly. Biological samples include blood (including cord-blood), urine, meconium and faeces, and placental tissue. In subgroups detailed data collection, such as continuous glucose monitoring and videos of parent-child interactions, are being collected.
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Mamani Mondragón, Camilo Vicente, Gustavo Augusto Gutiérrez Reynoso, Polina Perelman, Warren E. Johnson, and Federico Abel Ponce de León Bravo. "Uso de la micromatriz de alta densidad de bovino para la construcción de un mapa físico de polimorfismos de nucleótido simple en alpacas (Vicugna pacos)." Revista de Investigaciones Veterinarias del Perú 31, no. 3 (September 29, 2020): e18725. http://dx.doi.org/10.15381/rivep.v31i3.18725.

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El objetivo del estudio fue desarrollar un mapa físico preliminar de polimorfismos de nucleótido simple (PNSs) en alpaca usando un panel celular híbrido irradiado alpaca/hámster y una micromatriz de genotipado de alta densidad de bovino (BovineHD BeadChip-Illumina). Se realizó el genotipado de 92 clones celulares híbridos irradiados y cuatro muestras control (alpaca macho, alpaca hembra, hámster y 1:10 alpaca/hámster mezcla de ADN) con la micromatriz. Luego del genotipaje de las muestras control del ADN de alpaca y hámster solo se retuvieron PNSs de bovinos que mostraron una frecuencia de señal positiva de 1. Los PNSs identificados en el ADN de alpaca fueron filtrados para sustraer los presentes en el hámster. De estos últimos, solo se retuvieron para el análisis final aquellos que tuvieron una frecuencia de señal positiva de 0.2 a 0.8 para los 92 clones y se eliminaron los PNSs que presentaron falsos positivos. Los restantes PNSs específicos de alpaca fueron tabulados en el formato MapMaker y fueron analizados con el programa Carthagene para identificar grupos de ligamiento. Los grupos ligados fueron ubicados en el genoma referencial Vicugna_pacos-2.0.2, aplicando el programa BLAST y el comando SHORTBLAST, en la plataforma Galaxy. Las dos muestras control de alpaca registraron 294 165 PNSs, con señal positiva en la micromatriz de bovino. La cantidad de PNSs de alpaca, después de eliminar los PNSs positivos comunes con hámster, fue 50 686 y luego de eliminar los posibles falsos positivos quedaron 2924 PNSs. Esta cantidad se analizó con el programa Carthagene y resultó en 33 grupos de ligamiento, con un total de 216 PNSs. Las distancias calculadas entre estos PNSs oscilan entre 65.3 y 671.9 cR, con un logaritmo de probabilidades (LOD) >6.0. Finalmente, se encontraron un total de 31 PNSs en el genoma referencial (E-value<0.05).
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Sampaio, Natalia, Mark Gishen, Kevin Reed, Mel Brown, Daphne Gregory, and Kylie Munyard. "The occurrence and severity of grass toxicoses in Australian alpaca (Vicugna pacos) herds." Australian Journal of Experimental Agriculture 48, no. 8 (2008): 1099. http://dx.doi.org/10.1071/ea06325.

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A survey of 108 alpaca producers registered with the Australian Alpaca Association examined the occurrence and severity of ‘staggers’ (a colloquial term embracing various diseases of the nervous system in animals, characterised by neck tremors and head nodding in the milder alpaca cases and a lack of coordination in moving, a staggering gait and frequent falling in severe cases) in Australian alpaca and the presence of four pasture grasses, during three production seasons in 2004–2006. There have been few studies on the susceptibility of alpaca to staggers and its effect on productivity and animal welfare. The survey found that 23% of alpaca producers had observed staggering animals, with Victoria and South Australia being the most severely affected states. Clinical signs of staggers were most frequent in January–March, with a mean duration of 3 months. Some animals showed clinical signs lasting up to 12 months. A strong correlation was found between the presence of perennial ryegrass (P < 0.001) and phalaris (P < 0.003) and the occurrence of staggers. Based on grass presence and the timing when staggers was observed, it was concluded that perennial ryegrass toxicosis was the main cause of staggers in alpaca. About 12% and 9% of alpaca grazing pasture containing perennial ryegrass exhibited staggers in the two full seasons for which data were collected. Herds with staggering animals were correlated with those exhibiting possible subclinical effects – heat sensitivity and ill-thrift (P < 0.01) and reduced fertility (P < 0.05) – of perennial ryegrass endophyte toxins. Results indicate that weanlings and cria are more likely to stagger than adults. Thirteen of the 15 mixed farms with staggering alpaca did not observe staggers in other livestock, suggesting that alpaca may be more sensitive to the causal toxins than sheep and cattle.
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Wang, Hua, Farial Islam Farha, and Hafeezullah Memon. "Influence of Ultraviolet Irradiation and Protease on Scale Structure of Alpaca Wool Fibers." Autex Research Journal 20, no. 4 (November 19, 2020): 476–83. http://dx.doi.org/10.2478/aut-2019-0039.

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AbstractThe present research aimed to explore the influence of different felt-proofing methods on alpaca fibers’ scale structure. Dyed alpaca fibers were exposed to a particular wavelength of ultraviolet (UV) light for different periods and treated with protease to analyze the felt property and compare with untreated fibers. Experimental results have shown that alpaca fibers have better shrinkage resistance and dyeability after being exposed to UV light, whereas no recognizable change was obtained on the surface of alpaca fibers’ scale structure by scanning electron microscopy (SEM). In contrary, enzyme-treated alpaca fibers revealed improved dye rate and resistance to shrinkage. Especially, damaged scales on many areas of fiber surface were appeared by SEM, which indicates that UV may have a positive effect on enzyme treatment by damaging alpaca fibers’ surface structure and promoting the amount of protease going into the fibers’ inner layers. Therefore, eventually a better shrinkage resistance was obtained.
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Silva, Valter H. C., Ademir J. Camargo, Hamilton B. Napolitano, and Anselmo E. de Oliveira. "Estudo Químico Quântico da Adsorção dos Gases O2 e H2 sobre a Ftalocianina de Alumínio." Revista Processos Químicos 2, no. 3 (January 2, 2008): 23–30. http://dx.doi.org/10.19142/rpq.v02i03.p23-30.2008.

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Visando o desenvolvimento de novos materiais que possam ser utilizados na construção de sensores químicos seletivos para o oxigênio e dispositivos armazenadores de hidrogênio, cálculos teóricos DFT/B3LYP/6–31G(d) foram realizados nos complexos [AlPc]+ , [AlPc]0 , [(O2 )AlPc]+ , [(O2 )AlPc]0 , [(H2 )AlPc]+ e [(H2 )AlPc]0 com o programa Gaussian03. Os resultados mostram que há uma forte adsorção do O2 na AlPc, tanto no estado oxidado (–44,62 Kcal/mol) quanto no estado reduzido (–108,71Kcal/mol). Essa adsorção química leva a alterações estruturais e eletrônicas da AlPc que possibilita a sua utilização na construção de um sensor químico seletivo para a detecção de O2 . A adsorção física do H2 mostra que a AlPc pode ainda ser usada no desenvolvimento de dispositivos armazenadores de H2.
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Dissertations / Theses on the topic "Alpac"

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López, López Lino Constancio. "Kuna kasta quranakasa allpaqanakaxa (Lama pacos) manqañtakixa ajlliritayna ukhamaraki Ulla Ulla uywa awatiña juqhu pampanakaxa kunja ch'amanchiritaynasa." Diss., CLICK HERE for online access, 2004. http://contentdm.lib.byu.edu/u?/Benson,7272.

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Thesis (Ing.)--Universidad Católica Boliviana "San Pablo". Unidad Acade̕mica Campesina Tiahuanaco, Carrera Ingeniería Zootécnica, 2004.
Reproduced from copy at BYU's Benson Institute. Includes additional t.p. Includes bibliographical references.
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Castro, Modesto Tania Milagros. "Efecto del fluido folicular de alpaca en la maduración ovocitaria in vitro de alpaca (Vicugna pacos)." Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2018. https://hdl.handle.net/20.500.12672/9692.

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Evalúa el efecto del fluido folicular como suplemento en el medio de maduración sobre las tasas de maduración in vitro de ovocitos de alpaca. Las muestras biológicas fueron colectadas en el camal municipal de Huancavelica y trasladadas en una solución de NaCl al 0.9% a 4 ºC. En el laboratorio, los complejos cumulus-oophorus (CCO) fueron aislados de los folículos mediante dos métodos (aspiración y cortes) y los CCOs seleccionados fueron colocados en un medio de maduración suplementado con suero fetal bovino (SFB), fluido folicular (FF) o ambos (SFB+FF) y cultivados a 38.5 ºC, 5% de CO2 y 100% de humedad relativa durante 32 a 36 horas. La madurez de los ovocitos fue evaluada post-cultivo mediante la presencia del primer cuerpo polar. Para determinar la capacidad de los ovocitos maduros para completar los procesos de fertilización y desarrollo embrionario se realizaron 4 ensayos de FIV. Se trabajó con espermatozoides aislados de la zona caudal del epidídimo los que fueron seleccionados por el método de swim-up. La fertilización se realizó con una concentración de 2x106 esp/mL en medio HAM suplementado con heparina y PHE como agentes capacitantes. Los espermatozoides y ovocitos se cultivaron juntos bajo condiciones similares a las usadas para la maduración durante 18 horas, luego del cual, los ovocitos fueran lavados y cultivados en medio KSOM suplementado con SFB, piruvato sódico y gentamicina durante 7 días. En primer lugar, se comparó el promedio de CCO aislados mediante los métodos utilizados. Se obtuvo un promedio de 2.1 CCO aislados por ovario mediante el método de aspiración, mientras que con el método de cortes se obtuvo un promedio de 1.2 CCO por ovario, encontrándose diferencia significativa entre estos resultados (p˃0.05). En conclusión, los resultados sugieren que el método de aspiración muestra una mayor proporción de aislamiento de CCO en comparación con el método de cortes, asimismo se demuestra que el FF puede ser usado como un suplemento natural equivalente al SFB en los medios de maduración in vitro para ovocitos de alpaca.
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Zegarra, Mendizabal Rolando Rody. "Producción y comercialización de las prendas de Alpaca, una alternativa para el desarrollo del Altiplano Boliviano." Universidad Mayor de San Andrs. Programa Cybertesis BOLIVIA, 2008. http://www.cybertesis.umsa.bo:8080/umsa/2008/zegarra_mr/html/index-frames.html.

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En el presente trabajo de investigación veremos como las prendas de alpaca son demandadas por casi todo el mundo, si esta demanda internacional se incrementara y se continua trabajando en mejorar la producción además de proyectar políticas de ESTADO que permitan al productor trabajar en mejores condiciones, la producción de prendas de vestir de alpaca se constituirá en una fuente importante de generación de recursos que servirán para disminuir los índices de pobreza en las regiones mas deprimidas del país. Dichas prendas son un bien muy apreciado por sus propiedades, al mismo tiempo nuestro país es después de Perú el segundo a nivel mundial en tener materia prima disponible que puede ser empleada en la producción y elaboración para su exportación, al presente existe una gran demanda por países como E.E.U.U., JAPÓN, CHINA, AUSTRALIA y el continente EUROPEO, por esta razón es muy importante el desarrollo de la industria en este sector a través de un alto nivel de producción , calidad, competitividad y una promoción exagerada de las exportaciones para el desarrollo de todas estas prendas y de las respectivas regiones que la producen. Por la existencia de una gran demanda es que se debe mejorar, incentivar y sobre todo fomentar la industria de este sector para el desarrollo del país, ya que las exportaciones de prendas de alpaca son muy cotizadas aun más que las prendas de cachemira y las prendas de piel de camello por su alto grado de termosidad.
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Canorio, Pariona Nadia Milagro. "Criocapacitación del espermatozoide de alpaca (Lama pacos)." Master's thesis, Universidad Nacional Mayor de San Marcos, 2009. https://hdl.handle.net/20.500.12672/3175.

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El proceso de criopreservación de espermatozoides es ampliamente usado en los programas de reproducción asistida y de mejora genética de diversas especies. La alpaca es una especie doméstica de importancia económica en nuestro país. Existen diversas técnicas para el manejo de esta especie con la finalidad de realizar un programa de mejora genética. En el caso de la criopreservación de espermatozoides, se ha trabajado tanto con espermatozoides de semen y de epidídimo, siendo más factible para el presente trabajo el uso de espermatozoides del epidídimo. Una característica que presentan los espermatozoides criopreservados en la mayoría de especies es una alteración a nivel de la membrana plasmática la cual conlleva a una reacción del acrosoma prematura, así como el descenso de la movilidad, provocando que el tiempo de vitalidad de estos espermatozoides sea muy reducido, todas estas alteraciones son producto de un tipo especial de capacitación llamada “Criocapacitación” que hasta la fecha, la posible causa, no ha sido definida. El objetivo de este estudio fue demostrar la presencia de un estado de Criocapacitación en espermatozoides criopreservados de alpaca, estudiando principalmente la movilidad, viabilidad, estabilidad de la membrana plasmática, el patrón de proteínas fosforiladas en residuos de tirosina, el estado del sistema Proacrosina-Acrosina y la capacidad de unión a zona pelúcida que tienen estos espermatozoides a diferencia de lo que presentan espermatozoides capacitados in vitro. Los resultados indican que la criopreservación afecta directamente la movilidad, viabilidad e integridad de membrana acrosomal, mostrando que tanto espermatozoides capacitados y criopreservados ofrecen un mismo patrón de proteínas fosforiladas, y que los espermatozoides criopreservados presentan una mayor cantidad de enzima activa (Acrosina) en la región del acrosoma.
-- The process of sperm cryopreservation is widely used in the programs of assisted reproduction and genetic improvement of many species. The alpaca is a domestic species of economic importance in our country. There are many techniques for managing this species in order to carry out a genetic improvement program. For the cryopreservation of sperm, samples of sperm from semen and epididymis have been used, being more feasible for the present study the use of sperm from the epididymis. One feature present in the cryopreserved sperm in most species is a disturbance at the plasma membrane which leads to a premature acrosome reaction, as well as declining mobility, making the lifetime of the sperm very small. All these changes are the result of a special type of process called "Cryocapacitation" that so far, the possible cause, has not been defined. The aim of this study was to demonstrate the presence of a state of cryocapacitation on Alapaca’s cryopreserved spermatozoa, studying mainly mobility, viability and stability of the plasma membrane, the pattern of proteins phosphorylated in tyrosine residues, the state of Proacrosin-Acrosin system and the ability of binding to pellucida zone that have these cryopreserved sperm and compare these results with those from capacitated in vitro sperm. The results indicate that cryopreservation directly affects mobility, viability and integrity of acrosomal membrane, showing that both capacitated in vitro and cryopreserved sperm offered the same pattern of proteins phosphorylated in tyrosine residues and that cryopreserved sperm has an increment of active enzyme (Acrosin) in the acrosome region.
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Jacklitsch, Brenda Louise. "Texas camelid health and management survey." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-1930.

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Hilario, Poma Javier Alfredo. "Hiladora automática de fibra de lana de alpaca." Bachelor's thesis, Pontificia Universidad Católica del Perú, 2016. http://tesis.pucp.edu.pe/repositorio/handle/123456789/6596.

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El presente trabajo tiene como finalidad el desarrollo de una máquina automática que facilite el proceso de hilado de lana, en especial el hilado de lana de alpaca, a las personas y artesanos de zonas rurales, cuyo trabajo está relacionado al comercio y producción de dicha fibra. Con ayuda de este sistema mecatrónico, el artesano podrá ahorrar tiempo en el proceso de hilado y podrá invertirlo en otras actividades, como es el tejido o bordado. Además, gracias a este sistema, el hilo que se obtenga tendrá una mejor precisión con respecto al grosor de este, aumentando así su calidad; el usuario podrá seleccionar entre grosores de 1 mm, 2 mm o 3 mm de acuerdo al uso que él piense darle al hilo. También, debido a que ya no se invertirá demasiado tiempo en el proceso de hilado, las personas que exportan fibra de lana de alpaca en bruto y sin ningún acabado, podrán generar un valor agregado a sus exportaciones de una forma sencilla mediante el hilado de la fibra que exportan. En el capítulo 1 se plantea la problemática existente en el país con respecto al proceso del hilado y que el sistema mecatrónico debe resolver. En el capítulo 2 se mencionan los requerimientos y condiciones que el sistema mecatrónico debe cumplir, asimismo, se presenta el concepto de la solución que logrará cumplir tales requerimientos. En el capítulo 3 se explica detalladamente el funcionamiento del sistema, así como los elementos mecánicos y electrónicos que lo conforman, el detalle se muestra en los planos, esquemáticos y diagramas de flujo. En el capítulo 4 se hace el cálculo del presupuesto necesario para la implementación del sistema mecatrónico. Por último en el capítulo 5 se muestran las conclusiones a las que se llegaron al finalizar el presente trabajo.
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Montenegro, Bernales Juan Ignacio. "Caracterización histológica del timo en fetos de alpaca." Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2006. https://hdl.handle.net/20.500.12672/668.

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El objetivo del presente trabajo fue el estudio citoarquitectural de los segmentos cervicales y torácicos del timo en fetos de alpaca (Lama pacos), que ofrece complementos al conocimiento de este órgano. Para tal propósito, se recolectaron 10 fetos entre 41 y 188 días de edad, y ellos fueron diseccionados y sometidos a estudio histológico. Los resultados más importantes muestran que el esbozo del timo a los 40 días tiene una morfología citoarquitectural de tipo acinar infiltrado por escasas células linfocíticas y rodeado por células mesenquimales. A los 60 días el esbozo del segmento cervical se presenta como un “folículo” linfoide densamente poblado por timocitos; mientras que la región torácica tiene una apariencia cavitaria con proyecciones trabeculares cortas hacia la zona interna del esbozo. La diferenciación de corteza y médula primero se evidencian en los segmentos cervicales posteriores y torácicos a los 100 días, donde el parénquima tímico comienza a tener proyecciones trabeculares más definidas, dándole la apariencia de seudolobulaciones y es a los 130 días donde se evidencia una tenue diferenciación entre corteza y médula en los segmentos cervicales anteriores. A los 165 días todos los segmentos cervicales, así como el torácico, presentan disposición lobulillar bien definidos en corteza y médula. La cápsula tímica se mantiene principalmente como una doble capa celular y tejido conjuntivo laxo. Los vasos sanguíneos subcapsulares y trabeculares presentan endotelio fenestrado. Las células eritroblásticas se ubican en las zonas subcapsulares y corticales periféricas desde los 100 días. La barrera hematotímica comienza a organizarse desde los 60 días. Los corpúsculos medulares de Hassal son evidentes a los 100 días, así como la barrera celular reticular epitelial en la zona corticomedular desde los 130 días. Palabras Clave: Alpaca, feto, timo, timocito, corpúsculo de Hassal.
--- The aim of the present research was to study the cellular architectural features of the thymus´ cervical and thoracic segments in alpaca fetuses (Lama pacos), and provide accurate information to the knowledge of this organ. For such purpose, 10 alpaca fetuses aged 41-188 days were collected, dissected and histologically analyzed. The most important results shown that the thymus´ anlage, at 40 days of age, had an acinar architectural morphology infiltrated by a few lymphoid cells and surrounded by mesenchymal cells. At 60 days of age, the anlage of cervical region appeared as a lymphoid “follicle” with a dense population of thymocites, whereas the thoracic region had a cystic appearance with short trabecular projections toward the anlage´s inner zone. At 100 days of fetal age, first differentiation between cortex and medulla was evident in the posterior cervical and thoracic segments, where the thymic parenchyma started to have well-defined trabecular projections, giving it an appearance of pseudolobullations. Also, at 130 days of age a little differentiation between the cortex and medulla in the anterior cervical segments was observed. At 165 days of fetal age, all the cervical and thoracical segments shown a well-defined lobular arrangement in the cortex and medulla. Thymic cap remained mainly as a double cellular layer of lax connective tissue. Subcapsular and trabecular blood vessels shown fenestrated endothelium. Erythroblastic cells in the peripheral subcapsular and cortical zones since 100 days were observed. Hema-thymic barrier started to be arranged since 60 days. Hassal´s medullar corpuscle at 100 days, as well as the epithelial reticular cellular barrier in the cortical-medullar zone since 130 days were seen. Key Words: Alpaca, fetus, thymus, thymocite, Hassal´s corpuscle.
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8

Shim, Sohie. "Analytical techniques for differentiating huacaya and suri alpaca fibers." Connect to this title online, 2003. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1064202091.

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Thesis (Ph. D.)--Ohio State University, 2003.
Document formatted into pages; contains x, 108 p. Includes bibliographical references (p. 102-108). Abstract available online via OhioLINK's ETD Center; full text release delayed at author's request until 2006 Sep. 22.
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Nygaard, Erich Johannes. "Signal Transport and RF over Fiber Design for ALPACA." BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/8753.

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The design of the RF over fiber signal transport system for the ALPACA receiver is described, with particular attention to the strict noise requirements as well as dynamic range considerations. Also discussed are analytical tools for analyzing dynamic range in the context of RFI-rich radio astronomy observational settings, including formulas for maximum interference to noise ratios and a simulation framework for predicting distortion levels. Phase and gain stability measurements of the signal transport system are presented, including the effects of the multi-strand armored fiber optic cable. The resulting system meets design requirements, with equivalent noise temperature below 900 K in 90° F ambient air, resulting in less than 1 K contribution to the system noise temperature. Typical gain is 31-37 dB, and gain differences between channels are stable within 0.25 dB in 90° F conditions. Phase drift between channels due to electronics remains below 1° at room temperature, and below 1.3° in a warm environment. The fiber optic cable is predicted to cause phase changes between channels of no more than 1.3° per °C. Typical spurious free dynamic range is 99 dB·Hz^(⅔), and distortion levels for normal RFI conditions at Arecibo are expected to be 28 dB below the system noise floor.
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McElroy, Eoin. "Transdiagnostic psychopathology : testing alternative models using the ALSPAC cohort." Thesis, Ulster University, 2016. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.695306.

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Background: Classification is integral to both psychiatric research and clinical practice. However, despite well over 100 years of research and revisions to the nomenclature, our ability to accurately classify even the most common of psychiatric disorders is questionable. Psychiatry continues to be dominated by a number of categorical nosologies, which propagate distinct diagnostic entities. While such systems have been integral to the advancement of research and practice, they are not without limitations. One of the key weaknesses of categorical nosologies is their inability to account for widespread comorbidity. Indeed, research indicates that comorbidity is the rule rather than the exception, and occurs at rates that far exceed chance. The comorbidity phenomenon challenges the putatively distinct nature of psychiatric disorders, which in turn raises questions regarding the validity of these categories. An alternative approach, the liability-spectrum model (Krueger & Markon, 2006) has been proposed in an attempt to address the issue of comorbidity. This model, which has its roots in child and adolescent psychiatry, suggests that psychopathology, rather than consisting of a multitude of discrete disorders, is more likely to reflect as a smaller number of broad dimensions. This model is empirically based and has been supported by a large number of factor analytic studies, which indicate that the variance shared amongst the most common psychiatric disorders can be accounted for by two latent factors; internalizing (INT) and externalizing (EXT). INT reflects emotional disturbance, and encompasses the many mood , and anxiety disorders. EXT involves behavioural disinhibition, and includes such disorders as ADHD, oppositional defiant disorder, and conduct disorder. While this approach has been hailed for its empirical support, researchers have noted consistently high correlations between the !NT and EXT factors. This undermines the liability-spectrum model, as it appears comorbidity remains an issue at the dimension level. Aims: By better understanding the phenomenon of comorbidity, we may improve our understanding of the fundamental nature of psychiatric disorder. The present thesis sought to test a number competing hypotheses that attempt to explain the correlation between the INT and EXT dimensions of psychopathology. Methods: Analysis was conducted on data from the A von Longitudinal Study of Parents and Children (ALSPAC, N=14,541), a community cohort of children in England. Maternal-report versions of the Development and Wellbeing Assessment (DA WBA)were completed by the study mothers at three time points; when children were aged 7.5, 10.5 and 14 years. The DAWBA is used to assess Axis-I disorders. Five common INT disorders were assessed; social phobia, specific phobia, major depression, PTSD, and generalized anxiety disorder (GAD). Three EXT disorders were also assessed; ADHD, oppositional defiant disorder, and conduct disorder. A series of competing models, comprised of both observed and latent variables, were fit to the data. Results: The structure of psychopathology was successfully modelled as; i) two latent variables (INT, EXT) subsumed by a general psychopathological factor (P), ii) four homogenous sub-populations characterised by different patterns of comorbidity, and iii) a network of causally associated disorders. Conclusions: Psychiatric comorbidity is incredibly complex and open to multiple interpretations. It may be difficult to unequivocally establish whether comorbidity is due to an underlying shared aetiological agent (i.e. p) or whether comorbidity arises due to complex networks of association between symptoms and disorders. There are strengths and weaknesses to both approaches, which may become more apparent in particular contexts.
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Books on the topic "Alpac"

1

Balachandran, M. Alpa. Cet. 1: Dewan Bahasa dan Pustaka, 2006.

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Choque, Víctor Bustinza. La alpaca. Puno: Oficina de Recursos del Aprendizaje, Sección Publicaciones, UNA, 2001.

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Eric, Hoffman. The Complete alpaca book. 2nd ed. Santa Cruz, Calif: Bonny Doon Press, LLC, 2006.

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ill, Julian-Ottie Vanessa, ed. Come on, Alpaca. London: Collins, 1988.

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Eric, Hoffman. The alpaca book. Herald, Calif: Clay Press, 1995.

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Kefauver, Amy. Here I am!: Alpacas in America. [Bloomington, IN]: Classical Alpaca Farm Pub., 2009.

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Kefauver, Amy. Here I am!: Alpacas in America. [Bloomington, IN]: Classical Alpaca Farm Pub., 2009.

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Choque, Víctor Bustinza. Razas de alpacas del altiplano: Suri y wacaya. Puno: Universidad Nacional del Altiplano, Instituto de Investigaciones para el Desarrollo Social del Altiplano, 1985.

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Association, International Alpaca. WASI: Del ritual a la crianza = from ritual to breeding. Arequipa, Perú]: International Alpaca Association, 1998.

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Blancas, Juvenal Warthon. Crianza familiar y empresarial de la Alpaca : en las comunidades campesinas de Silco y Colca, provincias de Antabamba y Aymaraes (Apurímac). Cusco: Centro de Estudios Regionales Andinos Bartolomé de las Casas, 1995.

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Book chapters on the topic "Alpac"

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Gooch, Jan W. "Alpaca." In Encyclopedic Dictionary of Polymers, 30. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_473.

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Gooch, Jan W. "Alpaca Stitch." In Encyclopedic Dictionary of Polymers, 30. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_474.

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Bolton, Paul R., Katia Parodi, and Jörg Schreiber. "ALPA Introduction." In Applications of Laser-Driven Particle Acceleration, 1–8. Boca Raton, FL : CRC Press, Taylor & Francis Group, [2018]: CRC Press, 2018. http://dx.doi.org/10.1201/9780429445101-1.

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Bolton, Paul R., Katia Parodi, and Jörg Schreiber. "ALPA Conclusion." In Applications of Laser-Driven Particle Acceleration, 365–70. Boca Raton, FL : CRC Press, Taylor & Francis Group, [2018]: CRC Press, 2018. http://dx.doi.org/10.1201/9780429445101-26.

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Metcalf, Jessica L., Alan Cooper, and Jane C. Wheeler. "Alpaca and Llama: Domestication." In Encyclopedia of Global Archaeology, 145–47. New York, NY: Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4419-0465-2_2212.

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Metcalf, Jessica L., Alan Cooper, and Jane C. Wheeler. "Alpaca and Llama: Domestication." In Encyclopedia of Global Archaeology, 186–88. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-30018-0_2212.

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Elson, R. A. "Antibiotic-Loaded Acrylic Cement (ALAC)." In Current Concepts of Infections in Orthopedic Surgery, 247–50. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-69833-0_35.

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Gramiccia, Gabriele. "The alpaca enterprise, not forgetting cinchonas." In The Life of Charles Ledger (1818–1905), 23–68. London: Macmillan Education UK, 1988. http://dx.doi.org/10.1007/978-1-349-09949-8_2.

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Bathrachalam, C., V. La Manna, C. Renieri, and A. La Terza. "Asip and MCIR cDNA polymorphism in alpaca." In Fibre production in South American camelids and other fibre animals, 93–96. Wageningen: Wageningen Academic Publishers, 2011. http://dx.doi.org/10.3920/978-90-8686-727-1_11.

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Carretero, M. I., C. C. Arraztoa, C. I. Casaretto, W. Huanca, D. M. Neild, and M. S. Giuliano. "Alpaca sperm chromatin evaluation using Toluidine Blue." In Fibre production in South American camelids and other fibre animals, 141–44. Wageningen: Wageningen Academic Publishers, 2011. http://dx.doi.org/10.3920/978-90-8686-727-1_18.

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Conference papers on the topic "Alpac"

1

Eckroth, Joshua, Kim Chen, Heyley Gatewood, and Brandon Belna. "Alpaca." In the 2019 ACM Southeast Conference. New York, New York, USA: ACM Press, 2019. http://dx.doi.org/10.1145/3299815.3314438.

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Vu, Phong Minh, Tam The Nguyen, and Tung Thanh Nguyen. "ALPACA." In the 2019 ACM Southeast Conference. New York, New York, USA: ACM Press, 2019. http://dx.doi.org/10.1145/3299815.3314470.

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King, Jeff, Jennifer Stoll, Michael T. Hunter, and Mustaque Ahamad. "ALPACA." In Proceeding of the 2nd ACM workshop. New York, New York, USA: ACM Press, 2008. http://dx.doi.org/10.1145/1458527.1458540.

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Lesniewski-Laas, Chris, Bryan Ford, Jacob Strauss, Robert Morris, and M. Frans Kaashoek. "Alpaca." In the 14th ACM conference. New York, New York, USA: ACM Press, 2007. http://dx.doi.org/10.1145/1315245.1315299.

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Kang, Nanxi, Ori Rottenstreich, Sanjay Rao, and Jennifer Rexford. "Alpaca." In CoNEXT '15: Conference on emerging Networking Experiments and Technologies. New York, NY, USA: ACM, 2015. http://dx.doi.org/10.1145/2716281.2836092.

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Goldberg, Logan, Joel Katticaran, and Abraham Mhaidli. "Energy profiling with Alpaca." In SPLASH '16: Conference on Systems, Programming, Languages, and Applications: Software for Humanity. New York, NY, USA: ACM, 2016. http://dx.doi.org/10.1145/2984043.2998548.

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Kawata, Kazumasa, T. Asaba, Kinya Hibino, N. Hotta, M. Kataoka, Y. Katayose, Chihiro Kato, et al. "ALPAQUITA Array in the ALPACA Project." In 35th International Cosmic Ray Conference. Trieste, Italy: Sissa Medialab, 2017. http://dx.doi.org/10.22323/1.301.0437.

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Ohnishi, M., T. Asaba, Kinya Hibino, N. Hotta, M. Kataoka, Y. Katayose, Chihiro Kato, et al. "The overview of the ALPACA Experiment." In 35th International Cosmic Ray Conference. Trieste, Italy: Sissa Medialab, 2017. http://dx.doi.org/10.22323/1.301.0827.

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Laslandes, M. "Towards the spatialization of ALPAO dms." In International Conference on Space Optics — ICSO 2021, edited by Zoran Sodnik, Bruno Cugny, and Nikos Karafolas. SPIE, 2021. http://dx.doi.org/10.1117/12.2599663.

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Krzywda, Jakub, Ahmed Ali-Eldin, Eddie Wadbro, Per-Olov Ostberg, and Erik Elmroth. "ALPACA: Application Performance Aware Server Power Capping." In 2018 IEEE International Conference on Autonomic Computing (ICAC). IEEE, 2018. http://dx.doi.org/10.1109/icac.2018.00014.

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Reports on the topic "Alpac"

1

Johnston, Megan Christine. Ombré Alpaca Nuno Felting. Ames: Iowa State University, Digital Repository, September 2016. http://dx.doi.org/10.31274/itaa_proceedings-180814-1614.

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Neijenhuis, Francesca, Marko Ruis, and Martien Bokma. Advies over de geschiktheid van de alpaca als productiedier. Wageningen: Wageningen Livestock Research, 2015. http://dx.doi.org/10.18174/468584.

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