An example of Learning based on competences: Use of Maxima in Linear Algebra for Engineers

This paper analyzes the role of Computer Algebra Systems (CAS) in a model of learning based on competences. The proposal is an e-learning model Linear Algebra course for Engineering, which includes the use of a CAS (Maxima) and focuses on problem solving. A reference model has been taken from the Spanish Open University. The proper use of CAS is defined as an indicator of the generic ompetence: Use of Technology. Additionally, we show that using CAS could help to enhance the following generic competences: Self Learning, Planning and Organization, Communication and Writing, Mathematical and Technical Writing, Information Management and Critical Thinking.

Quartus scripti Oxoniensis super sententias / [editum a fratre Joa[n]ne Duns ordinis fratrum minorum ... per ... Mauritium de Portu hiberni cum eiusdem ordinis fratrum minorum ... maxima xum diligentia emendatum].

Marca tip. xil. en colofón en 4E6r

Quartus scripti Oxoniensis super sententias / [editum a fratre Joa[n]ne Duns ordinis fratrum minorum ... per ... Mauritium de Portu hiberni cum eiusdem ordinis fratrum minorum ... maxima xum diligentia emendatum].

Marca tip. xil. en colofón en 4E6r

Explicit summa Angelica de casib[us] [con]sci[enti]e / p[er] fratre[m] Angelu[m] d[e] clauasio co[m]pilata ; maxima cu[m] dilige[n]tia reuisa, [et] fideli studio emendata ; sicut ip[sum] op[us] p[er] se sat[is] attestabit[ur].

Huecos para iniciales

Polydori Vergilii vrbinatis adagiorum liber ; eiusdem de inuentoribus rerum libri octo / ex accurata autoris castigatione, locupletationeq[ue] non vulgari, adeo vt maxima ferè pars primae ante hac vtriusq[ue] voluminis aeditioni accesserit.

Pie de imp. tomado del colofón

Do principio da probidade administrativa e de sua maxima efetivação

Inclui notas explicativas e bibliograficas

Phloem sap proteins from Cucurbita maxima and Ricinus communis have the capacity to traffic cell to cell through plasmodesmata

In angiosperms, the functional enucleate sieve tube system of the phloem appears to be maintained by the surrounding companion cells. In this study, we tested the hypothesis that polypeptides present within the phloem sap traffic cell to cell from the companion cells, where they are synthesized, into the sieve tube via plasmodesmata. Coinjection of fluorescently labeled dextrans along with size-fractionated Cucurbita maxima phloem proteins, ranging in size from 10 to 200 kDa, as well as injection of individual fluorescently labeled phloem proteins, provided unambiguous evidence that these proteins have the capacity to interact with mesophyll plasmodesmata in cucurbit cotyledons to induce an increase in size exclusion limit and traffic cell to cell. Plasmodesmal size exclusion limit increased to greater than 20 kDa, but less than 40 kDa, irrespective of the size of the injected protein, indicating that partial protein unfolding may be a requirement for transport. A threshold concentration in the 20–100 nM range was required for cell-to-cell transport indicating that phloem proteins have a high affinity for the mesophyll plasmodesmal binding site(s). Parallel experiments with glutaredoxin and cystatin, phloem sap proteins from Ricinus communis, established that these proteins can also traffic through cucurbit mesophyll plasmodesmata. These results are discussed in terms of the requirements for regulated protein trafficking between companion cells and the sieve tube system. As the threshold value for plasmodesmal transport of phloem sap proteins falls within the same range as many plant hormones, the possibility is discussed that some of these proteins may act as long-distance signaling molecules.

Comparación de las macroalgas epizóicas de la madreperla Pinctada mazatlanica (Hanley 1856) con las de fondos rocosos en la bahía de La Paz, Baja California Sur, México

El presente estudio describe la comunidad de macroalgas epizóicas de Pinctada mazatlanica y la compara con la del substrato rocoso. Colectamos un total de 36 muestras de la comunidad de macroalgas, 18 muestras sobre ostras y otras tantas sobre substrato rocoso en la Península San Juan Nepomuceno, bahía de La Paz, México. Las algas fueron colectadas mediante buceo SCUBA raspando las distintas superficies (25 cm2 de substrato rocoso). El tamaño de muestra fue ajustado por curva de acumulación de especies y expresado con un modelo polinomial. Comparamos las comunidades de algas con análisis multivariantes de similitud basados en el índice de Bray-Curtis, entre substratos, diferentes alturas de ostras perleras y profundidades. Encontramos 27 especies de algas epizóicas (15.4% Clorophyta, 3.8% Phaeophyta y 80.8% Rhodophyta) con una disimilitud de 71.16% con respecto al substrato rocoso. El dendrograma mostró tres agrupaciones de macroalgas en P. mazatlanica. El primero caracterizado por Chondria, Jania, Herposiphonia tenella y Gracilaria. El segundo compuesto por Jania, Polysiphonia acuminata, P. decusata y Spyridia filamentosa. El tercero constituido por Polysiphonia sp., Jania, Herposiphonia tenella, Ceramium canouii y Amphiroa sp. Estas agrupaciones y los talos filamentosos de las algas epizóicas corresponden a estados iniciales de sucesión.

Terrae Yemen maxima Pars. seu Imperii Imami, Principatus Kaukebân, nec non ditionum Haschid U Bekîl, Nehhm, Chaulân, Abu Arîsch Et Aden Tabula: ex observationibus astronomicis et hodometricis jussu et suntibus Potentissimor: Daniae Regnum Friderici V et Christiani VII institutis

delineata Auctore C. Niebuhr ; Gustav Conrad Lotter Sculps.

Q. Asco. Pediani In Ciceronis orationes commentarii atq[ue] Georgius Trapezuntius, De artificio Ciceroniae orationis Pro. Q. Ligario : nuper maxima diligentia excuti.

Edit16,

Crisis astrologica physica mathematica y choronologica y pronostico universal sobre la maxima conjuncion del año 1723, dia ... de Enero : con expresion de los sucessos politicos cosechas de frutos ... y singular enarració de ... y constitucion de los tiempos, en particular, se ... el pronostico de cada uno de los años, y sus eclypses visibles hasta el año 1741 /

Mode of access: Internet.

Theatrum universale omnium animalium, piscium, avium, quadrupedum, exanguium, aquaticorum, insectorum et angium : CCLX tabulis ornatum ex scriptoribus tam antiquis quam recentioribus Aristoteles, Theophrasto, Dioscoride ... & aliis maxima curâ à J. Jonstonio collectum ac plus quam trecentis piscibus nuperrime ex Indiis Orientalibus allatis ... /

Contiene: Collectio nova piscium amboinemsium partim ibi ad vivum delineatorum partim ex museo Henrici Ruysch, 40 p., XX h. de grab. ; Historia naturalis piscium / cura H. Ruysch ; praefatio Joh. Jonstoni, [6], 160 p., XLVIII h. de grab. ; Theatri universalis animalium : pars secunda sive Historiae naturalis de avibus ..., [12], 160 [i.e. 168] p., 62 h. de grab., la última con port. propia

Theatrum universale omnium animalium, piscium, avium, quadrupedum, exanguium, aquaticorum, insectorum et angium : CCLX tabulis ornatum ex scriptoribus tam antiquis quam recentioribus, Aristoteles, Theophrasto, Dioscoride ... & aliis maxima curâ à J. Jonstonio collectum ac plus quam trecentis piscibus [et]nuperrime ex Indiis Orientalibus allatis ... /

Contiene: Historiae naturalis de quadrupedibus, 163, [1] p., LXXX h. de grab. ; Theatro universalis animalium pars quarta sive Historiae naturalis de exanguibus ..., [4], 3-58, [2] p., XX h. de grab. ; Theatri universalis animalium pars quinta sive Historiae naturalis de insectis ..., [6], 147, [1] p., XXVIII h. de grab. ; Theatri universalis animalium pars sexta sive Historiae naturalis de serpentibus, [4], 3-37 [i.e. 39], [1] p., XII h. de grab., las tres últimas con port. propia

Collectio maxima Conciliorum Hispaniae, epistolarumque decretalium celebriorum /

Mode of access: Internet.

Iuris civilis septimus tomus continens absolutissimum indicem et summam omnium, quae continentur tam in textu, quam in glossa totius iuris civilis maxima distinctione contextum ... /

Contiene: [7.1]: [A-I] ; 7.2: [L-Z]