Caracterización del error en el corte de desbaste de trayectorias circulares mediante WEDM.

[ES]En la actualidad el proceso de mecanizado mediante electroerosión por hilo (WEDM) posee varias problemáticas a la hora de la ejecución de los cortes para producir diferentes formas, ya sean esquinas, radios de redondeo o de acuerdo y por último la realización de círculos. Es por ello por lo que se elabora el presente trabajo cuya finalidad es llegar a caracterizar los errores cometidos en el corte de desbaste de probetas con trayectorias circulares y tecnología estándar. De esta manera se podrá cuantificar las desviaciones que se producen en las piezas en función del espesor y de sus radios. Toda la información obtenida en el trabajo permitirá una futura actuación en diversos parámetros máquina, elaborando nuevas tecnologías o bien poder mitigarlos realizando correcciones geométricas, ajustando sus tolerancias.

Análisis del mecanizado de un molde para la fabricación de un logo deportivo.

[ES]Las compañías líderes del mundo textil compiten cada día por ser las número 1 en cuanto a ventas se refiere. Para ello, son necesarias diferentes estrategias de venta. Una de ellas es la adición de diferentes adornos de plástico que hacen que el comprador se fije en sus productos. Por otro lado, las tecnologías de mecanizado están en pleno avance y la fabricación de piezas o moldes es cada vez más eficiente. Por eso en este trabajo se quiere analizar y estudiar la fabricación de un molde de inyección de plástico con el logotipo de una de las marcas más famosas en el mundo, Adidas. Se ha de llevar a cabo un estudio de los posibles materiales a utilizar para el molde, así como, las distintas alternativas de mecanizado que hoy en día se emplean para este tipo de procesos. Además, los avances en los distintos programas CAD/CAM son de especial ayuda para este tipo de trabajos. Estos programas son capaces de trazar las trayectorias más eficientes a la hora de mecanizar distintos tipos de piezas y postprocesar la programación de dichas trayectorias para luego ser introducidas en los centros CNC.

Sistemas automaticos de trading

[ES] Este proyecto se centra en los sistemas automáticos de trading, una herramienta cuya utilización en los mercados cada vez es mayor. El objetivo principal es dotar al lector de los conocimientos necesarios para desarrollar un sistema automático. Para ello, en primer lugar se explican la teoría de la eficiencia de los mercados y la de Dow, las cuales introducen al análisis fundamental y técnico, que luego, se definen y comparan entre sí. Después, se describen las figuras principales del análisis chartista y se analizan los indicadores del técnico. Antes de terminar, se ponen a prueba los conocimientos obtenidos mediante la realización del análisis técnico de Meliá Hotels. En la parte final, se define qué son los sistema automático de trading, se clasifican en grupos y se explican las ventajas frente al trading manual. Además, se desarrolla un sistema automático de trading para demostrar que con los conocimientos adquiridos durante el proyecto se podría desarrollar uno.

SupraMOFs: Supramolecular porous materials assembled from metal-nucleobase discrete entities

289 p.

Desarrollo de la empatía en edades tempranas

[es] La empatía es una teoría multidimensional que incluye componentes afectivos y cognitivos y, a su vez, permite comprender y sentir los pensamientos y emociones de las demás personas. El estudio que se lleva a cabo tiene dos objetivos: 1) detectar el nivel de desarrollo de la teoría de la mente; 2) observar las diferencias en empatía en función de las variables de género y edad. Para ello, se utiliza una muestra de 36 participantes de 3 a 6 años, 18 chicos y 18 chicas, de Barakaldo (Bizkaia). Los resultados (ANOVA) muestran diferencias sexuales en empatía, con puntuaciones superiores en las niñas. Además, con la edad aumentan progresivamente las puntuaciones en todas las variables.

Giza-erlazioen psikologia: adimen emozionala eta gizarte harremanak

[eus] Egungo gizartean, konpetentzia emozional maila baxuak “analfabetismo emozionala” jarri du agerian (Goleman, 1996). Arrazoi honengatik, adimen emozionala jorratu beharra dago, bai familia eta baita hezkuntza arloan ere. Hau guztiagatik, ikerketa honen xede nagusia, 7-11 urte tarteko umeen trebetasun sozialak kooperazioaren bitartez sustatzea da; izan ere, garai horretan, gizabanakoaren bizitza soziala goreneko intentsitatera heltzen da. Honetarako, Bilboko Pagasarribide ikastetxean (Lehen Hezkuntzako 5.maila) jorratzeko unitate didaktikoa aurkezten da. Beraz, bertako bi jardueratan lortutako emaitzak kontuan hartuz, baieztatu ahal da, honi esker, ikasleen trebetasun sozialak garatu direla eta emozionalki adimentsuagoak izatea lortuko dutela unitate didaktiko hau bere osotasunean jorratu ondoren.

Irteerak ikaskuntza baliabide bezala: Armañon Interpretazio Zentroa

[eus] Haur Hezkuntzan zientziaren ikaskuntzarako baliabide aberasgarrienetako bat irteerak dira, hauek beharrezkoak baitira haurraren garapen integralerako. Horretarako, irteerak eskolaren parte izan behar dute eta irakasleek bisitaldiak proposatu behar dituzte. Hainbat toki daude bisitak egiteko HHko haurrekin eta lan honetan Armañongo Interpretazio Zentroaren hezkuntza eskaintza aztertuko da, adin txikiko umeen kasuan bertako baliabideen eragina ikusi ahal izateko. Zentroaren arduradunen iritziak ezagututa eta HHko haurren bisitaldia aztertuta, emaitzak eta ondorioak aterako dira.

Preliminary biological evaluation of some formulated feeds for P. monodon

Rice bran is widely used by fish farmers as supplementary feed while soybean cake is used both as feed and as fertilizer in fishponds. Both fish meal and shrimp head have been found acceptable as feed ingredients. However, not much is known of the acceptability and efficiency of a mixture of these ingredients as feed for Penaeus monodon larvae. Ninety 127-day old P. monodon were measured for length and weight and were randomly divided into nine aquaria each containing 20 liters of water. These were fed 'lampirong' for two months previous to the study. There were three replications for each treatment. Length, weight, and survival rates were used to compare the efficiency of the diets. Weighed amounts of pellets equivalent to 100% of the body weight were fed during the first three days and reduced to 50% thereafter. A stopwatch was used to determine the length of time that elapsed before the shrimps would approach the pellet. Ten shrimps approximately 4 months in age were placed in 10 liters of water in a 25-liter aquarium. Two grams of each pellet type were placed simultaneously on opposite sides of the aquarium. The time that elapsed from the moment the pellets sunk to the bottom up to the time that any one shrimp approached the pellets was recorded. The group fed the imported pellets gained the most. Those fed FP-2s-77 elongated faster than those fed FP-1s-77. Survival rate of those fed FP-2s-77 was 37% while those fed imported pellets was 73%. Both 1s and 2s pellets disintegrated in water easily but the imported pellets were stable even after six hours in water. The attractability test for the pellets showed that the prawns were more readily attracted to the pellets 1s and 2s than to the imported pellets.

A preliminary study on the protein requirement of Chanos chanos (Forskal) fry in a controlled environment

Growth rate of fish appeared to be related to the levels of the protein in the diet up to 40%. Fish fed diets containing 50 and 60% grew slower than those fed 40%, and the optimum level appears to be 40% when fed to fry at a rate of 10% of body weight. Best feed conversion of 1.96 was also obtained from the 40% protein diet. Mean survival rates were low in all treatments, but highest for the 40% protein diet. The competition of 5 isocaloric experimental diets containing various levels of protein are tabulated, as are weight gains, diet conversions and survival rates for milkfish fry fed various dietary levels of protein. Growth curves for milkfish fry are shown, and the relationship between weight gains of milkfish fry and the dietary levels of protein are illustrated.

Growth and survival of Penaeus monodon postlarvae fed shrimp head meal and fish meal as primary animal source of protein

Although shrimp head meal alone does not provide for good growth and survival, fish meal can provide high survival rate. The addition of shrimp head improves this diet. It is suggested that cholesterol present in shrimp could have caused this difference. Composition of the test diets is tabulated, as are proximate chemical analysis of the diets, and the mean initial weights, final weights, weight gains, survival rate, feed consumed, protein consumed, of Penaeus monodon postlarvae, feed conversion and protein efficiency ratio.

The effect of different binders on the water stability of feeds for prawn

Corn starch, gelatin, sago palm starch, agar, and bread flour were tested for their binding capacity in pelleted diets for Penaeus monodon . Agar was found to be good binder, but it costs too much, while bread flour was also good but as it's commonly used for human comsumption its use for animal feed should be minimized. The use of 20% bread flour, or a combination of 5% sago palm starch or corn starch with 15% bread flour is recommended, depending on the cost and availability. Basic composition of the formulated diet is tabulated, as is water stability of 2 and 4 mm diameter steamed pellets after 2, 6 and 18 h.

A preliminary study on the use of the local variety of ipil-ipil Leucaena leucocephala as a protein source for prawn feed

A study was carried out to determine the effect of 10 or 20% leaves or seeds in the diet of Penaeus monodon , and the extent to which local ipil-ipil (Leucaena leucocephala ) could replace head shrimp meal. A brief description is given of the experimental methodology, and details of composition of the diet, proximate chemical composition of the diets, mean weight gain and survival of Penaeus monodon larvae fed shrimp head meal and ipil-ipil as protein sources, are presented. Mean weight gains for all groups were poor and not statistically significant. Survival rates for those fed 10% ipil-ipil were significantly higher than those fed 20% diets. Wherever the survival rate was high, mean weight gain was low and vice versa. The presence of the toxic alkaloids mimosine in ipil-ipil could have caused the low survival rate.

Fishwater and agar as binders in a prawn diet

The objectives of the study were to find out the proportion of water to fish fins, skin and bones that would give a good gel and to determine the effect of a combination of fish water and commercial crude agar on the water stability of the prawn diet. Under the conditions of the experiments it was concluded: (1) Fish water and commercial agar or agar bar gave the most stable pellet, 65% water stability; (2) a strong gel is obtained when one part shark fin is boiled in 1.5 parts water; (3) more fish water can be obtained from guitar fish than from shark fish.