Comparison of Contemporary Protocols for High-speed Data Transport via 10 Gbps WAN Connections

This work is dedicated to comparison of open source as well as proprietary transport protocols for highspeed data transmission via IP networks. The contemporary common TCP needs significant improvement since it was developed as general-purpose transport protocol and firstly introduced four decades ago. In nowadays networks, TCP fits not all communication needs that society has. Caused of it another transport protocols have been developed and successfully used for e.g. Big Data movement. In scope of this research the following protocols have been investigated for its efficiency on 10Gbps links: UDT, RBUDP, MTP and RWTP. The protocols were tested under different impairments such as Round Trip Time up to 400 ms and packet losses up to 2%. Investigated parameters are the data rate under different conditions of the network, the CPU load by sender andreceiver during the experiments, size of feedback data, CPU usage per Gbps and the amount of feedback data per GiByte of effectively transmitted data. The best performance and fair resources consumption was observed by RWTP. From the opensource projects, the best behavior is showed by RBUDP.

Dois ácaros associados à abelha (Apis mellifera L.) no Perú

Larvas de Leptus sp. (Acari, Prostigmata, Erythraeidae) foram coletadas das membranas intersegmentares dos tergitos e esternitos abdominais de abelhas (Ápis mellifera L.) em Cerro de Pasco, Peru. Não foram relatados danos por este ectoparasito. Fêmeas de Blattisoeius dentriticus (Berlese, 1918) (Acari, Mesostigmata, Ascidae) foram coletadas de colméias de abelhas, junto com Tyrophagus putrescentiae (Schrank, 1781) (Acari, Astigmata, Acaridae), em Lima, Peru.

Non root feeding with two sources of zinc on Coffea arábica L. 'mundo novo'(B.Rodr.) Choussy

A trial was carried out on an eight old coffee plantation with visible zinc problems. The plantation was situated nearly the city of Jaú (22º30'S, 48º30'W). State of São Paulo, Brazil. The soil is classified as medium texture Oxisol of low base saturation (Latossol Vermelho Amarelo - fase arenosa). The pulverization program started in november 1977, followed in march and July 1978 (heavy harvest) and ended in march and July 1979 (light harvest). Is should be mentioned that a well reconized characteristic of arábica coffe is its habit of biennial bearing, a very heavy harvest is most often followed by a light load the next year. The following treatments and amounts of chemicals per cova hole (4 trees) were tested in accordance with a random block design: 1. 1 g of zinc (zinc sulphate, 0.5%) 2. 3 g of nitrogen (urea, 1.3%) 3. 1 g of zinc + 3 g of nitrogen (zinc sulphate 0.5% + urea 1.3%) 4. 0.25 g, 0.50 g, 1.00 g, 2.00 g of zinc plus 0.75 g, 1.50 g, 3.00 g and 6.00 of nitrogen (correspondent to NZN* 15-0-0-5 as 0.75%, 1-5%, 3.0% and 6.0% by v/v). Foliar absorption data were obtained by collecting the 3rd and 4th pairs of the coffee leaves and analysed them for N, P, K, Ca, Mg, S, B, Cu, Fe, Mn, and Zn. The main results may be summarized as follows: 1. The maximum calculated yields of clean coffee were obtained by the applications of 5.84 1 of NZN (1.13%) per hectare. 2. The applications of zinc sulphate (0.5%) and urea (1.3%) together or separate did not affected the coffee bean production. 3. The applications of 15.0 1 of NZN per hectare reduced the coffee yields. 4. Leaf damages and burning symptoms were observed by the applications of urea (1.3%) plus zinc sulphate (0.5%) and larger doses than 7.5 1 of NZN per hectare. 5. Leaf tissue analysis show that the concentrations of the elements were affecred by the age of the leaves and by the yields of the coffee trees. 6. The applications of increasing doses of NZN causes an increase in the concentration of zinc, manganese and boron in the leaves and decreased the concentration in calcium and potassium the leaves. 7. The concentration of zinc in the leaves associated with the heavy harvest, in July, was 70.0 ppm.

pressure resistance of hollow glass fibers at internal pressure load

Otto-von-Guericke-Universität Magdeburg, Fakultät für Maschinenbau, Univ., Dissertation, 2015

Organization of the cysts in bee (Hymenoptera, Apidae) testis: number of spermatozoa per cyst

The morphology of the cyst cells in Apis mellifera Linné, 1758, Scaptotrigona postica Latreille, 1804, and Melipona bicolor bicolor Lepeletier, 1836 testis, as well as the average number of spermatic cells are reported. The data indicates a supporting and nourrishing role of the cyst cells to the developing cystocytes. The counts of immature spermatozoa in the cysts show an average of 202.8 ± 21.2 spermatozoa for A. mellifera, 117.4 ± 8.68 for S. postica and 88.8 ± 15.57 for M. bicolor, which predict the occurrence of 8 mitotic cycles in the cystocytes of A. mellifera and 7 in the meliponines, considering that only one spermatozoom originates of each final spermatogonium.

Studi sui Ragni Malesi e Papuani / per T. Thorell. Parte IV : dell'Indo-Malesia, raccolti da O. Beccari, G. Doria, H. Forbes, J. G. H. Kinberg Ed Altri.

v.2:p.4 (1891-1892)

Studi sui Ragni Malesi e Papuani / per T. Thorell. Parte IV : dell'Indo-Malesia, raccolti da O. Beccari, G. Doria, H. Forbes, J. G. H. Kinberg Ed Altri.

v.1:p.4 (1889-1890)

Icones filicum ad eas potissimum species illustrandas destinatæ, quæ hactenus, vel in herbariis delituerunt prorsus incognitae, vel saltem nondum per icones botanicis innotuerunt.Figures and descriptions of ferns, principally of such as have been altogether unnoticed by botanists, or as have not yet been correctly figured.By William Jackson Hooker and Robert Kaye Greville.

v. 1

Icones filicum ad eas potissimum species illustrandas destinatæ, quæ hactenus, vel in herbariis delituerunt prorsus incognitae, vel saltem nondum per icones botanicis innotuerunt.Figures and descriptions of ferns, principally of such as have been altogether unnoticed by botanists, or as have not yet been correctly figured.By William Jackson Hooker and Robert Kaye Greville.

v. 2

GEPA: Garantia d'Espai per la Perpetuïtat de l'Accés

L'objectiu d'aquest estudi és doble: la de presentar els elements fonamentals a resoldre de cara a crear un magatzem col·laboratiu que solucioni els problemes creats per la manca d'espai per a les col·leccions existents i futures, així com presentar les característiques pràctiques d'un cas recent que l'autor coneix directament.

Anàlisi de viabilitat d'un entorn informàtic comú per al nou sistema de gestió de les biblioteques universitàries

Totes les universitats públiques catalanes, entre d'altres institucions, fan servir el programari VTLS per a la gestió de les seves biblioteques. Per a aquesta funció, cada universitat disposa d'un sistema propi en què esta instal·lada localment la base de dades del seu catàleg. El CBUC posseeix el catàleg col·lectiu, resultat de la fusió de tots els fons. En base a aquest últim es realitza la catalogació per còpia i la consulta global de tots els fons simultàniament. Aquest sistema de col·laboració ha estat pioner des de fa molts anys a Espanya, seguint les principals tendències internacionals. Però, en aquests moments, raons tecnològiques i de funcionalitat fan inevitable un canvi de sistema, davant el qual els membres del CBUC estan oberts a noves solucions tècniques i organitzatives que els proporcionin nous avantatges funcionals i econòmics. Per això, el CBUC ha analitzat l'oportunitat d'obrir un nou marc de col·laboració que es fonamentaria en l'establiment d'una instal·lació única i comuna per allotjar el nou sistema informàtic. Un cop analitzats els diferents escenaris possibles, l'opció que es proposa és tenir una aplicació individual per a cada institució compartint un únic sistema informàtic. L'èxit d'experiències internacionals similars avalen una col·laboració com aquesta. És especialment representativa la finlandesa: totes les biblioteques universitàries feien servir des de fa anys el programari VTLS per gestionar-se i van evolucionar conjuntament cap a un nou sistema comú, integrant els disset servidors locals de cada institució en un únic sistema global per a totes (Linnea2). Aquesta col·laboració suposaria l'adquisició d'un únic sistema informàtic que s'instal·laria al CESCA per allotjar les aplicacions de les diferents institucions. Aquestes hi accedirien a través de l'Anella Científica. L'administració de les aplicacions la faria el CBUC. Els principals avantatges que aportaria aquesta solució són: · Increment substancial de la disponibilitat del sistema. · Estalvis econòmics importants (entre 1.742.000 i 2.149.000 euros en cinc anys).

Aproximació al disseny de procediments i instruments per a la personalització de l'ensenyament a l'etapa primària des d'una perspectiva inclusiva

The main objective of this research is to found a new process about the personalization's curriculum for pupils with especial educational needs. In this research there are two objectives: the first objective is to describe a procedure for to do the individual planning for this pupils. This procedure is called "Procediment per cartes de personalització" (Pedragosa 2002). The other objective is centered to validate this procedure for teachers who are in active service in primary's etapa and to check if it's a good process for to do the individual planning in an inclusive approach. The procedure's cobcretion is about three basic referents: In the first, we consult with the current regulations, in the second we incorporate the inclusion's approach and the fundamentals of universal learning design, and finally we consult Ruiz's (1999) provides. We obtain the information for the research until, during and after of the formation's course (in 2003/2004). We introduced two questionnaire (until and after of formation sessions) and we register all of the sessions with a parlimentary report. About the main research results we can to affirm that the procedure is a good option for the professional's practice. It's an organized, ordered and coherent design with our curriculum. But, in spite of, we can to probate that there some interesting variables which are to influence to the procedure's efficiency.